U.S. patent application number 17/600557 was filed with the patent office on 2022-06-02 for cartridge vane pump and pump device.
This patent application is currently assigned to KYB Corporation. The applicant listed for this patent is KYB Corporation. Invention is credited to Hiroki IKEDA, Fumiyasu KATO, Ryouichi NAGASAKA.
Application Number | 20220170458 17/600557 |
Document ID | / |
Family ID | |
Filed Date | 2022-06-02 |
United States Patent
Application |
20220170458 |
Kind Code |
A1 |
NAGASAKA; Ryouichi ; et
al. |
June 2, 2022 |
CARTRIDGE VANE PUMP AND PUMP DEVICE
Abstract
A cartridge vane pump includes: a linkage member being
configured to link the side member and the cover member, the
linkage member has: a first support portion configured to support
the side member; a second support portion configured to support the
cover member; and an extended portion formed so as to extend
between the first support portion and the second support portion,
the extended portion extending in an axial direction of the rotor,
grooves are respectively formed in outer circumferential surfaces
of the side member and the cover member so as to extend in a
circumferential direction, and the first support portion and the
second support portion are respectively received in the grooves
formed in the side member and the cover member.
Inventors: |
NAGASAKA; Ryouichi; (Gifu,
JP) ; KATO; Fumiyasu; (Aichi, JP) ; IKEDA;
Hiroki; (Gifu, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
KYB Corporation |
Tokyo |
|
JP |
|
|
Assignee: |
KYB Corporation
Tokyo
JP
|
Appl. No.: |
17/600557 |
Filed: |
March 5, 2020 |
PCT Filed: |
March 5, 2020 |
PCT NO: |
PCT/JP2020/009485 |
371 Date: |
September 30, 2021 |
International
Class: |
F04C 2/344 20060101
F04C002/344; F04C 15/00 20060101 F04C015/00 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 1, 2019 |
JP |
2019-069831 |
Claims
1. A cartridge vane pump attached to a body of a fluid pressure
device, the cartridge vane pump comprising: a rotor configured to
be driven rotationally; a plurality of vanes provided in the rotor
so as to be able to freely reciprocate in a radial direction of the
rotor; a cam ring having an inner circumference cam face with which
the plurality of vanes are brought into sliding contact; a side
member brought into contact with a first end surface of the rotor
and a first end surface of the cam ring; a cover member brought
into contact with a second end surface of the rotor and a second
end surface of the cam ring, the cover member being attached to the
body; and a linkage member provided so as to extend between the
side member and the cover member, the linkage member being
configured to link the side member and the cover member, wherein
the linkage member has: a first support portion configured to
support the side member; a second support portion configured to
support the cover member; and an extended portion formed so as to
extend between the first support portion and the second support
portion, the extended portion extending in an axial direction of
the rotor, grooves are respectively formed in outer circumferential
surfaces of the side member and the cover member so as to extend in
a circumferential direction, and the first support portion and the
second support portion are respectively received in the grooves
formed in the side member and the cover member.
2. The cartridge vane pump according to claim 1, wherein a straight
groove is formed in the outer circumferential surfaces of the side
member, the cam ring, and the cover member, the straight groove
being configured such that the respective grooves formed in the
side member and the cover member are communicated with each other,
and the extended portion is received in the straight groove.
3. The cartridge vane pump according to claim 1, wherein the
extended portion forms a pair thereof extending in straight lines,
one of the first support portion and the second support portion
forms a pair thereof, the pair respectively extending in mutually
opposite directions from first end portions of the pair of extended
portions, and other of the first support portion and the second
support portion is formed so as to extend between second end
portions of the pair of extended portions.
4. A pump device comprising: the cartridge vane pump according to
claim 1; the body configured to accommodate the cartridge vane
pump; and a low pressure chamber formed between the body and an
outer circumference of the cartridge vane pump, the low pressure
chamber being configured to function as a suction passage
communicating with a suction port of the cartridge vane pump;
wherein the linkage member is accommodated in the low pressure
chamber.
Description
TECHNICAL FIELD
[0001] The present invention relates to a cartridge vane pump, and
a pump device provided with the cartridge vane pump.
BACKGROUND ART
[0002] JP2018-189057A discloses a cartridge vane pump including a
rotor, a plurality of vanes, a cam ring, a side member, a cover
member, and a linkage member provided so as to bridge the side
member and the cover member over an outer circumferential surface
of the cam ring to link the side member and the cover member.
[0003] In the cartridge vane pump described in JP2018-189057A, the
side member and the cover member are linked by the linkage member,
and thereby, the rotor, the vanes, and the cam ring are held
between the cover member and the side member. The linkage member
has: a linkage portion linked to one of the side member and the
cover member; an extended portion extended in the axial direction
of the rotor from the linkage portion towards the other of the side
member and the cover member; and a support portion projected out
from the extended portion in the direction intersecting the
extended portion and supports the other of the side member and the
cover member.
SUMMARY OF INVENTION
[0004] In the above, in a first embodiment of JP2018-189057A shown
in FIGS. 1 to 5, because the support portion is inserted into a
groove formed in the side plate, the support portion projects
outward in the radial direction of the side plate. Therefore, there
is a problem in that the dimension of the cartridge vane pump in
the radial direction is increased.
[0005] In addition, in a second embodiment of JP2018-189057A shown
in FIGS. 6 to 9, because the linkage portion is inserted into holes
formed in the side plate in a freely rotatable manner, the linkage
portion projects outwards in the radial direction of the side
plate. Therefore, similarly to the first embodiment, there is a
problem in that the dimension of the cartridge vane pump in the
radial direction is increased.
[0006] An object of the present invention is to provide a compact
cartridge vane pump.
Solution to Problem
[0007] According to one aspect of the present invention, a
cartridge vane pump attached to a body of a fluid pressure device,
the cartridge vane pump includes: a rotor configured to be driven
rotationally; a plurality of vanes provided in the rotor so as to
be able to freely reciprocate in a radial direction of the rotor; a
cam ring having an inner circumference cam face with which the
plurality of vanes are brought into sliding contact; a side member
brought into contact with a first end surface of the rotor and a
first end surface of the cam ring; a cover member brought into
contact with a second end surface of the rotor and a second end
surface of the cam ring, the cover member being attached to the
body; and a linkage member provided so as to extend between the
side member and the cover member, the linkage member being
configured to link the side member and the cover member, the
linkage member has: a first support portion configured to support
the side member; a second support portion configured to support the
cover member; and an extended portion formed so as to extend
between the first support portion and the second support portion,
the extended portion extending in an axial direction of the rotor,
grooves are respectively formed in outer circumferential surfaces
of the side member and the cover member so as to extend in a
circumferential direction, and the first support portion and the
second support portion are respectively received in the grooves
formed in the side member and the cover member.
BRIEF DESCRIPTION OF DRAWINGS
[0008] FIG. 1 is a sectional view of a pump device provided with a
cartridge vane pump according to an embodiment of the present
invention.
[0009] FIG. 2 is a plan view of a rotor, a vane, and a cam
ring.
[0010] FIG. 3 is a front view of the cartridge vane pump shown in
FIG. 1, in which illustration of a linkage member is omitted.
[0011] FIG. 4 is a perspective view of the cartridge vane pump
according to the embodiment of the present invention and shows a
state in which the linkage member is removed.
[0012] FIG. 5 is a perspective view of the cartridge vane pump
according to the embodiment of the present invention and shows a
state in which the linkage member is attached.
DESCRIPTION OF EMBODIMENTS
[0013] An embodiment of the present invention will be described
below with reference to the drawings.
[0014] A cartridge vane pump (hereinafter, simply referred to as "a
vane pump") 100 according to the embodiment of the present
invention is used as a fluid pressure source for a fluid pressure
device mounted on a vehicle (for example, a power steering
apparatus, a transmission, and so forth). Although descriptions are
given to the vane pump 100 using working oil as working fluid in
this description, aqueous alternative fluid such as working water,
etc. may also be used as the working fluid.
[0015] In the description of each embodiment, although a surface of
each member may be referred to as "an upper surface" or "a lower
surface", the reference as above is made for the surface of each
member only for the sake of ease of explanation, and there is no
intention to limit an orientation and the attachment direction of
the vane pump 100.
[0016] The vane pump 100 according to the embodiment of the present
invention and a pump device 1000 provided with the vane pump 100
will be described first with reference to FIGS. 1 to 5.
[0017] As shown in FIG. 1, the vane pump 100 is provided with a
driving shaft 10, a rotor 20 that is linked to the driving shaft
10, a plurality of vanes 30 that are provided in the rotor 20, and
a cam ring 40 that accommodates the rotor 20 and the vanes 30. The
rotor 20 is rotated together with the driving shaft 10 by a motive
force transmitted from a driving source (for example, an engine, an
electric motor, and so forth) to the driving shaft 10.
[0018] In the following description, the direction along the
rotation center axis of the rotor 20 will be referred to as "the
axial direction", the radiating direction centered at the rotation
center axis of the rotor 20 will be referred to as "the radial
direction", and the direction around the rotation center axis of
the rotor 20 will be referred to as "the circumferential
direction".
[0019] FIG. 2 is a plan view showing the rotor 20, the vanes 30,
and the cam ring 40. As shown in FIG. 2, in the rotor 20, a
plurality of slits 21 are formed in a radiating pattern with
predetermined gaps therebetween. The slits 21 open at an outer
circumferential surface of the rotor 20, and the vanes 30 are
respectively inserted into the slits 21 so as to be freely
reciprocatable in the radial direction.
[0020] Tip-end portions 31 of the vanes 30 face an inner
circumferential surface 40a of the cam ring 40. Base-end portions
32 of the vanes 30 are positioned in the slits 21, and back
pressure chambers 22 are formed by the slits 21 and the vanes
30.
[0021] As the rotor 20 is rotated, the vanes 30 are biased radially
outward by a centrifugal force and projected out from the slits 21.
As a result, the tip-end portions 31 of the vanes 30 are brought
into sliding contact with the inner circumferential surface 40a of
the cam ring 40, and thereby, pump chambers 41 are defined by the
rotor 20, the adjacent vanes 30, and the cam ring 40.
[0022] The inner circumferential surface 40a of the cam ring 40 is
formed to have a substantially oval shape. Thus, as the rotor 20 is
rotated, the vanes 30 reciprocate in the radial direction with
respect to the rotor 20. Along with the reciprocating movement of
the vanes 30, the pump chambers 41 are repeatedly expanded and
contracted. In the following description, the inner circumferential
surface 40a of the cam ring 40 may also be referred to as "the
inner circumference cam face 40a".
[0023] In the vane pump 100, as the rotor 20 completes a full
rotation, the vanes 30 reciprocate twice, and the pump chambers 41
repeat the expansion and contraction twice. In other words, the
vane pump 100 has, in an alternate manner in the circumferential
direction, two expansion regions 42a and 42c where the pump
chambers 41 are expanded and two contraction regions 42b and 42d
where the pump chambers 41 are contracted.
[0024] As shown in FIG. 1, the vane pump 100 is provided with a
body-side side plate (side member) 50 that is brought into contact
with a first end surface 40b of the cam ring 40 and a cover-side
side plate 56 that is brought into contact with a second end
surface 40c of the cam ring 40. An upper surface 50c of the
body-side side plate 50 faces a first end surface of the rotor 20,
and a lower surface 56b of the cover-side side plate 56 faces a
second end surface of the rotor 20.
[0025] The rotor 20 and the vanes 30 are brought into sliding
contact with the upper surface 50c of the body-side side plate 50
and the lower surface 56b of the cover-side side plate 56. The pump
chambers 41 are sealed by the upper surface 50c of the body-side
side plate 50 and the lower surface 56b of the cover-side side
plate 56 (see FIG. 2).
[0026] In the body-side side plate 50, a shaft pit 51 is formed so
as to open at the upper surface 50c. The shaft pit 51 is formed
coaxially with the rotation center axis of the rotor 20, and a one
end portion 11 of the driving shaft 10 is inserted into the shaft
pit 51.
[0027] A bearing 52 is provided between an outer circumferential
surface of the one end portion 11 of the driving shaft 10 and an
inner circumferential surface of the shaft pit 51. The driving
shaft 10 is rotatably supported by the body-side side plate 50 via
the bearing 52.
[0028] In the cover-side side plate 56, a shaft hole 57 is formed
so as to penetrate the cover-side side plate 56 in the axial
direction. The shaft hole 57 is formed coaxially with the rotation
center axis of the rotor 20, and the driving shaft 10 is inserted
through the shaft hole 57.
[0029] As shown in FIGS. 2 and 3, suction ports 43 are formed in
the cam ring 40, the body-side side plate 50, and the cover-side
side plate 56, and an external space of the vane pump 100 is
communicated with the pump chambers 41 through the suction ports
43. The suction ports 43 are located in the expansion regions 42a
and 42c. As the rotor 20 is rotated, the working oil outside the
vane pump 100 is sucked into the pump chambers 41 through the
suction ports 43.
[0030] As shown in FIG. 1, in the body-side side plate 50,
discharge ports 53 are formed so as to penetrate the body-side side
plate 50 in the axial direction, and the pump chambers 41 (see FIG.
2) are communicated with an outside space of the vane pump 100
through discharge ports 53. The discharge ports 53 are located in
the contraction regions 42b and 42d (see FIG. 2). As the rotor 20
is rotated, the working oil in the pump chambers 41 is discharged
from the discharge ports 53 to the outside of the vane pump
100.
[0031] In addition, the vane pump 100 is provided with a cover 61
that is attached to a body 70 of the pump device 1000 by using
bolts (not shown). By attaching the cover 61 to the body 70, the
cam ring 40, the body-side side plate 50, and the cover-side side
plate 56 are fixed to the body 70.
[0032] In the vane pump 100, the cover 61 is formed separately from
the cover-side side plate 56, and a lower surface 61b of the cover
61 is brought into contact with an upper surface 56c of the
cover-side side plate 56. A cover member 60 is formed by the cover
61 and the cover-side side plate 56.
[0033] In the cover 61, a shaft hole 66 is formed so as to
penetrate the cover 61 in the axial direction. The shaft hole 66 is
formed coaxially with the rotation center axis of the rotor 20, and
the driving shaft 10 is inserted into the shaft hole 66. The
driving shaft 10 is rotatably supported by the cover 61 via a
bearing (not shown).
[0034] The lower surface 61b of the cover 61 is formed with pin
holes (not shown) into which dowel pins 46 (see FIG. 2) are
press-fitted. The dowel pins 46 are inserted into pin holes in the
cover-side side plate 56 and the cam ring 40 and into pin holes in
the body-side side plate 50. With the dowel pins 46, the cover 61,
the cover-side side plate 56, and the body-side side plate 50 are
aligned with respect to the cam ring 40.
[0035] The cam ring 40, the body-side side plate 50, and the
cover-side side plate 56 of the vane pump 100 are accommodated in
an accommodating concave portion 71 formed in the body 70. The
accommodating concave portion 71 is formed by a first concave
portion 71a that opens at an upper surface 70a of the body 70, a
second concave portion 71b that opens at a bottom surface of the
first concave portion 71a, and a third concave portion 71c that
opens at a bottom surface of the second concave portion 71b.
[0036] The opening of the first concave portion 71a is closed by
fitting a fitting portion 64 of the cover 61 to an inner
circumferential surface of the first concave portion 71a. Details
of the configuration of the cover 61 will be described below. The
inner circumferential surface of the first concave portion 71a
faces an outer circumferential surface 40d of the cam ring 40 and
an outer circumferential surface 56d of the cover-side side plate
56 such that a gap is formed therebetween. An annular low pressure
chamber 72 that forms a part of a suction passage 73 is formed by
the first concave portion 71a, the cam ring 40, and the cover-side
side plate 56.
[0037] The low pressure chamber 72 communicates with the pump
chambers 41 via the suction ports 43 (see FIG. 3) and with a tank
(not shown) via the suction passage 73 formed in the body 70. When
the vane pump 100 is operated, the working oil in the tank is
sucked into the pump chambers 41 via the suction passage 73, the
low pressure chamber 72, and the suction ports 43.
[0038] A bottom surface of the third concave portion 71c faces a
lower surface 50b of the body-side side plate 50 such that a gap is
formed therebetween. A high-pressure chamber 74 is formed by the
third concave portion 71c and the body-side side plate 50.
[0039] The high-pressure chamber 74 communicates with the pump
chambers 41 via the discharge ports 53 and with a discharge passage
75 formed in the body 70. When the vane pump 100 is operated, the
working oil in the pump chambers 41 is discharged to the discharge
passage 75 via the discharge ports 53 and the high-pressure chamber
74.
[0040] The high-pressure chamber 74 also communicates with the back
pressure chambers 22 (see FIG. 2), and thereby, the working oil in
the high-pressure chamber 74 is guided to the back pressure
chambers 22. Therefore, the vanes 30 are biased radially outward
not only by the centrifugal force, but also by the pressure in the
back pressure chambers 22.
[0041] A part of the body-side side plate 50 is fitted into an
inner circumferential surface of the second concave portion 71b. An
annular seal member 76 is provided between the lower surface 50b of
the body-side side plate 50 and the bottom surface of the second
concave portion 71b. A gap between the lower surface 50b of the
body-side side plate 50 and the bottom surface of the second
concave portion 71b is closed by the seal member 76. By providing
the seal member 76, it is possible to prevent the working oil from
flowing back and forth between the low pressure chamber 72 and the
high-pressure chamber 74 through the gap.
[0042] In a state in which the cover 61 is attached to the body 70,
the seal member 76 is compressed by the body-side side plate 50 and
the body 70 and biases the body-side side plate 50, the cam ring
40, and the cover-side side plate 56 towards the cover 61. Thus, it
is difficult for the working oil in the pump chambers 41 (see FIG.
2) to leak from between the cam ring 40 and the body-side side
plate 50 and from between the cam ring 40 and the cover-side side
plate 56. Therefore, it is possible to improve the discharge
performance of the vane pump 100.
[0043] The cover 61 has a main body portion 63 that is brought into
contact with the upper surface 70a of the body 70 (see FIG. 1), the
fitting portion 64 that is fitted to the inner circumferential
surface of the first concave portion 71a of the body 70, and a
small-diameter portion 65 having the outer diameter that is smaller
than the outer diameter of the fitting portion 64. The fitting
portion 64 projects out from the main body portion 63 in the axial
direction. An annular groove 64a for receiving an O-ring (not
shown) is formed in an outer circumferential surface of the fitting
portion 64. By fitting the inner circumferential surface of the
first concave portion 71a of the body 70 and the fitting portion
64, the communication between the low pressure chamber 72 and the
exterior of the vane pump 100 is shut off. The small-diameter
portion 65 projects out from the fitting portion 64 towards the
opposite side from the main body portion 63 in the axial direction.
An end surface of the small-diameter portion 65 is brought into
contact with the upper surface 56c of the cover-side side plate
56.
[0044] The vane pump 100 is further provided with a linkage member
80 that is provided so as to extend between the body-side side
plate 50 and the cover member 60 to link the body-side side plate
50 and the cover member 60. The linkage member 80 links the
body-side side plate 50 and the cover member 60 by being received
in grooves formed in the outer circumferential surfaces of the
body-side side plate 50, the cam ring 40, the cover-side side plate
56, and the cover 61.
[0045] Next, the grooves for receiving the linkage member 80 will
be described with reference to FIGS. 4 and 5.
[0046] A groove 91 is formed in an outer circumferential surface of
the body-side side plate 50 so as to extend in the circumferential
direction. A groove 93 is formed in an outer circumferential
surface of the small-diameter portion 65 of the cover 61 so as to
extend in the circumferential direction. Straight grooves 92 are
formed in the outer circumferential surfaces of the body-side side
plate 50, the cam ring 40, the cover-side side plate 56, and the
small-diameter portion 65 of the cover 61 such that the groove 91
and the groove 93 are communicated with each other. The grooves 92
are formed so as to extend continuously over the body-side side
plate 50, the cam ring 40, the cover-side side plate 56, and the
small-diameter portion 65 of the cover 61. In this embodiment, a
pair of grooves 92 are formed so as to be located away from each
other by 180.degree.. In FIGS. 4 and 5, only one of the pair of
grooves 92 is shown.
[0047] Next, a configuration of the linkage member 80 will be
described.
[0048] The linkage member 80 has: first support portions 81 that
support the body-side side plate 50; a second support portion 83
that supports the cover 61; and a pair of extended portions 82 that
are each formed so as to extend between the first support portion
81 and the second support portion 83 and that extend linearly in
the axial direction of the rotor 20. In this embodiment, a pair of
first support portions 81 are formed so as to extend in the
mutually opposite directions from respective first end portions of
the pair of extended portions 82. In addition, the second support
portion 83 is formed between respective second end portions of the
pair of extended portions 82, thereby connecting the pair of
extended portions 82 with each other.
[0049] The pair of first support portions 81 of the linkage member
80 are received in the groove 91 that is formed in the outer
circumferential surface of the body-side side plate 50. The pair of
extended portions 82 are respectively received in the pair of
grooves 92 that are formed so as to extend continuously over the
outer circumferential surfaces of the body-side side plate 50, the
cam ring 40, the cover-side side plate 56, and the small-diameter
portion 65 of the cover 61. The second support portion 83 is
received in the groove 93 that is formed in the outer
circumferential surface of the small-diameter portion 65 of the
cover 61.
[0050] As described above, the linkage member 80 is received in the
groove 91, the pair of grooves 92, and the groove 93 over its
entire length. The pair of first support portions 81 support the
body-side side plate 50, and the second support portion 83 supports
the cover 61, and thereby, the body-side side plate 50 is linked
with the cover 61.
[0051] The grooves 91 to 93 are formed to have a depth capable of
receiving the linkage member 80.
[0052] Next, a method of assembling the vane pump 100 will be
described.
[0053] The dowel pins 46 are first press-fitted into the pin holes
of the cover 61 (not shown). Subsequently, the cover-side side
plate 56 and the cam ring 40 are stacked on the cover 61 in this
order. At this time, the dowel pins 46 are inserted into the
respective pin holes of the cover-side side plate 56 and the cam
ring 40.
[0054] Next, the rotor 20 is allowed to be received in the inner
circumference of the cam ring 40, and the driving shaft 10 is
inserted into a splined hole of the rotor 20, the shaft hole 57 of
the cover-side side plate 56, and the shaft hole 66 of the cover
61. The vanes 30 are received in the slits 21 of the rotor 20, and
the tip-end portions 31 of the vanes 30 face the inner
circumference cam face 40a of the cam ring 40.
[0055] Next, the body-side side plate 50 is stacked on the cam ring
40. At this time, the dowel pins 46 are inserted into the pin holes
of the body-side side plate 50, and the driving shaft 10 is
inserted into the shaft pit 51 of the body-side side plate 50.
[0056] Next, the second support portion 83 of the linkage member 80
is caused to be received in the groove 93 of the cover 61, the pair
of extended portions 82 are caused to be respectively received in
the pair of grooves 92 formed in the outer circumferential surfaces
of the body-side side plate 50, the cam ring 40, the cover-side
side plate 56, and the small-diameter portion 65 of the cover 61,
and the first support portions 81 are caused to be respectively
received in the groove 91 of the body-side side plate 50.
[0057] By doing so, the cover 61 and the body-side side plate 50
are linked by the linkage member 80, and thereby, the rotor 20, the
vanes 30, the cam ring 40, and the cover-side side plate 56 are
held between the cover 61 and the body-side side plate 50, and the
assembly of the vane pump 100 is completed.
[0058] In a state in which the cover 61 and the body-side side
plate 50 are linked by the linkage member 80, the movement of the
body-side side plate 50 in the direction away from the cover 61 is
restricted. Therefore, even when only the cover 61 is held and
lifted up with the lower surface 61b of the cover 61 facing
downward, the cover-side side plate 56, the rotor 20, the vanes 30,
the cam ring 40, and the body-side side plate 50 are not separated
away from the cover 61. Thus, it is possible to integrally move the
vane pump 100 without causing it to fall apart due to vibrations,
etc. during a transportation, and in addition, because the vane
pump 100 can be attached to the body 70 with ease, it is possible
to improve the ease of attachment of the vane pump 100.
[0059] In addition, the linkage member 80 is received in the
grooves 91 to 93. Therefore, the dimension of the vane pump 100 in
the radial direction is reduced. Furthermore, because the low
pressure chamber 72 and the body 70 can be made smaller, it is
possible to reduce the size of the pump device 1000.
[0060] According to the above-described first embodiment, the
advantages described below are afforded.
[0061] In the vane pump 100, the linkage member 80 is received in
the grooves 91 to 93 formed in the outer circumferential surfaces
of the body-side side plate 50, the cam ring 40, the cover-side
side plate 56, and the cover 61. Therefore, the first support
portions 81 and the second support portion 83 of the linkage member
80 do not project radially outward of the body-side side plate 50
and the cover member 60, and so, it is possible to reduce the
dimension of the vane pump 100 in the radial direction. Thus, it is
possible to make the vane pump 100 compact. In addition, because
the vane pump 100 can be made compact, it is possible to make the
low pressure chamber 72 and the body 70 of the pump device 1000
smaller, and so, it is possible to reduce the size of the pump
device 1000.
[0062] In addition, the linkage member 80 is received in the
grooves 91 to 93 over the entire length of the first support
portions 81, the pair of extended portions 82, and the second
support portion 83. Therefore, the linkage member 80 does not
project radially outward of the body-side side plate 50 and the
cover 61, and so, it is possible to reduce the dimension of the
vane pump 100 in the radial direction.
[0063] In addition, the linkage member 80 is brought into contact
with the grooves 91 to 93 over the entire length of the first
support portions 81, the pair of extended portions 82, and the
second support portion 83. Therefore, a contact area between the
linkage member 80 and the vane pump 100 is increased, and so, it is
possible to suppress rattling of the vane pump 100.
[0064] In addition, because the body-side side plate 50 and the
cover 61 are linked easily only by causing the linkage member 80 to
be received in the grooves 91 to 93, an assemblability of the vane
pump 100 is improved.
[0065] In addition, in the vane pump 100, the first support
portions 81 of the linkage member 80 are formed to make the pair
that respectively extend in the mutually opposite directions from
the respective first end portions of the pair of extended portions
82. Therefore, the body-side side plate 50 is fixed by receiving a
counter force from the first support portions 81, and therefore, it
is possible to firmly link the body-side side plate 50 and the
cover 61. In addition, because the linkage member 80 is prevented
from falling off from the grooves 91 to 93, it is possible to
prevent unintentional disassembly of the vane pump 100.
[0066] In addition, in the vane pump 100, the rotor 20, the vanes
30, the cam ring 40, and the cover-side side plate 56 are held by
the linkage member 80 between the cover 61 and the body-side side
plate 50. Therefore, the vane pump 100 can be moved integrally
without causing it to fall apart due to the vibrations, etc. during
the transportation, and in addition, the vane pump 100 can also be
attached to the body 70 of the pump device 1000 with ease, and
therefore, it is possible to improve the assemblability of the vane
pump 100.
[0067] Furthermore, in the vane pump 100, the grooves 91 to 93 open
at the outer circumferential surfaces of the body-side side plate
50, the cam ring 40, the cover-side side plate 56, and the cover
61. Therefore, the linkage member 80 can be removed by only pulling
and separating the linkage member 80 away from the grooves 91 to
93. Thus, the linkage between the body-side side plate 50 and the
cover 61 by the linkage member 80 can be released with ease, and
therefore, it is possible to easily disassemble the vane pump
100.
[0068] Next, modifications of the present embodiment will be
described. The modifications described below also fall within the
scope of the present invention. It may also be possible to combine
the following modifications with the respective configurations in
the above-described embodiment, and it may also be possible to
combine the following modifications with each other.
[0069] (1) In the above-described embodiment, the grooves 91 to 93
are formed to have the depth capable of receiving the linkage
member 80. Instead of this configuration, the grooves 91 to 93 may
have a depth with which a part of the linkage member 80 is exposed
from the grooves 91 to 93.
[0070] (2) In the above-described embodiment, the linkage member 80
has two first support portions 81 and two extended portions 82.
Instead of this configuration, the linkage member 80 may have three
or more extended portions 82 and three or more first support
portions 81.
[0071] (3) In the above-described embodiment, in the linkage member
80, the pair of first support portions 81 are received in the
groove 91 to support the body-side side plate 50, and the second
support portion 83 is received in the groove 93 to support the
cover 61. Instead of this configuration, in the linkage member 80,
the pair of first support portions 81 may be received in the groove
93 to support the cover 61, and the second support portion 83 may
be received in the groove 91 to support the body-side side plate
50.
[0072] The configurations, operations, and effects of the
embodiment according to the present invention will be collectively
described below.
[0073] The cartridge vane pump 100 attached to the body 70 of the
fluid pressure device includes: the rotor 20 configured to be
driven rotationally; the plurality of vanes 30 provided in the
rotor 20 so as to be able to freely reciprocate in the radial
direction of the rotor 20; the cam ring 40 having the inner
circumference cam face 40a with which the plurality of vanes 30 are
brought into sliding contact; the body-side side plate 50 brought
into contact with the first end surface of the rotor 20 and the
first end surface 40b of the cam ring 40; the cover member 60
brought into contact with the second end surface of the rotor 20
and the second end surface 40c of the cam ring 40, the cover member
60 being attached to the body 70; and the linkage member 80
provided so as to extend between the body-side side plate 50 and
the cover member 60, the linkage member 80 being configured to link
the body-side side plate 50 and the cover member 60, wherein the
linkage member 80 has: the first support portions 81 configured to
support the body-side side plate 50; the second support portion 83
configured to support the cover member 60; and the extended
portions 82 formed so as to extend between the first support
portions 81 and the second support portion 83, the extended
portions 82 extending in the axial direction of the rotor 20, the
grooves 91 and 93 are respectively formed in the outer
circumferential surfaces of the body-side side plate 50 and the
cover member 60 so as to extend in the circumferential direction,
and the first support portions 81 and the second support portion 83
are respectively received in the grooves 91 and 93 formed in the
body-side side plate 50 and the cover member 60.
[0074] In this configuration, the first support portions 81 and the
second support portion 83 are respectively received in the grooves
91 and 93 extending in the circumferential direction in the outer
circumferential surfaces of the body-side side plate 50 and the
cover member 60. Therefore, the outward projection of the first
support portions 81 and the second support portion 83 in the radial
direction of the body-side side plate 50 and the cover member 60 is
suppressed, and thereby, it is possible to reduce the dimension of
the cartridge vane pump 100 in the radial direction. Thus, it is
possible to make the cartridge vane pump 100 compact.
[0075] In addition, the straight grooves 92 are formed in the outer
circumferential surfaces of the body-side side plate 50, the cam
ring 40, and the cover member 60, the straight grooves 92 being
configured such that the respective grooves 91 and 93 formed in the
body-side side plate 50 and the cover member 60 are communicated
with each other, and the extended portions 82 are received in the
straight grooves 92.
[0076] In this configuration, the extended portions 82 are
respectively received in the straight grooves 92 through which the
grooves 91 and 93 respectively formed in the body-side side plate
50 and the cover member 60 are communicated with each other.
Therefore, the outward projection of the extended portions 82 in
the radial direction of the body-side side plate 50 and the cover
member 60 is suppressed, and thereby, it is possible to reduce the
dimension of the cartridge vane pump 100 in the radial
direction.
[0077] In addition, the extended portions 82 form a pair thereof
extending in straight lines, one of the first support portion 81
and the second support portion 83 forms a pair thereof, the pair
respectively extending in mutually opposite directions from the
first end portions of the pair of extended portions 82, and the
other of the first support portion 81 and the second support
portion 83 is formed so as to extend between the second end
portions of the pair of extended portions 82.
[0078] In this configuration, the one of the first support portion
81 and the second support portion 83 forms the pair thereof by
extending in the mutually opposite directions from the first end
portions of the pair of extended portions 82. Therefore, the
body-side side plate 50 or the cover member 60 is fixed by
receiving the counter force from the first support portion(s) 81 or
the second support portion(s) 83, and thereby, it is possible to
firmly link the body-side side plate 50 and the cover member
60.
[0079] In addition, the pump device 1000 includes: the cartridge
vane pump 100 described above; the body 70 configured to
accommodate the cartridge vane pump 100; and the low pressure
chamber 72 formed between the body 70 and the outer circumference
of the cartridge vane pump 100, the low pressure chamber 72 being
configured to function as the suction passage 73 communicating with
the suction ports 43 of the cartridge vane pump 100, wherein the
linkage member 80 is accommodated in the low pressure chamber
72.
[0080] In this configuration, because the dimension of the
cartridge vane pump 100 in the radial direction is reduced, the low
pressure chamber 72 and the body 70 can be made smaller, and it is
possible to reduce the size of the pump device 1000. Furthermore,
by providing the linkage member 80, the rotor 20, the vanes 30, and
the cam ring 40 are held between the cover member 60 and the
body-side side plate 50. Therefore, the cartridge vane pump 100 can
be attached to the body 70 of the pump device 1000 with ease, and
therefore, it is possible to improve the assemblability of the pump
device 1000.
[0081] Embodiments of the present invention were described above,
but the above embodiments are merely examples of applications of
the present invention, and the technical scope of the present
invention is not limited to the specific constitutions of the above
embodiments.
[0082] With respect to the above description, the contents of
application No. 2019-69831, with a filing date of Apr. 1, 2019 in
Japan, are incorporated herein by reference.
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