U.S. patent application number 15/759990 was filed with the patent office on 2018-09-13 for vane pump.
This patent application is currently assigned to KYB Corporation. The applicant listed for this patent is KYB Corporation. Invention is credited to Koichiro AKATSUKA, Tomoyuki FUJITA, Hiroki GOMI, Shota SHINDO.
Application Number | 20180258931 15/759990 |
Document ID | / |
Family ID | 58289049 |
Filed Date | 2018-09-13 |
United States Patent
Application |
20180258931 |
Kind Code |
A1 |
AKATSUKA; Koichiro ; et
al. |
September 13, 2018 |
VANE PUMP
Abstract
A vane pump includes a pump cartridge that is accommodated in an
accommodating space defined by the concave portion and the pump
cover. The pump cartridge includes a first side plate that is
provided between the bottom portion of the concave portion in the
pump body and a cam ring; first pins that are provided so as to
extend from the cam ring to the first side plate; and second pins
that are provided so as to extend from the first side plate to the
pump body.
Inventors: |
AKATSUKA; Koichiro; (Gifu,
JP) ; FUJITA; Tomoyuki; (Gifu, JP) ; GOMI;
Hiroki; (Gifu, JP) ; SHINDO; Shota; (Gifu,
JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
KYB Corporation |
Tokyo |
|
JP |
|
|
Assignee: |
KYB Corporation
Tokyo
JP
|
Family ID: |
58289049 |
Appl. No.: |
15/759990 |
Filed: |
August 29, 2016 |
PCT Filed: |
August 29, 2016 |
PCT NO: |
PCT/JP2016/075170 |
371 Date: |
March 14, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F04C 2/324 20130101;
F04C 15/06 20130101; F04C 15/0003 20130101; F04C 15/00 20130101;
F04C 2/344 20130101 |
International
Class: |
F04C 15/00 20060101
F04C015/00; F04C 2/324 20060101 F04C002/324; F04C 15/06 20060101
F04C015/06 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 16, 2015 |
JP |
2015-183260 |
Claims
1. A vane pump comprising: a pump body having a concave portion; a
pump cover attached to the pump body, the pump cover being
configured to seal the concave portion; and a pump cartridge
accommodated in an accommodating space defined by the concave
portion and the pump cover, wherein the pump cartridge comprises: a
rotor linked to a driving shaft; a plurality of slits formed in the
rotor in a radiating pattern to open in an outer circumference of
the rotor; a plurality of vanes respectively inserted into the
plurality of slits in a slidable manner; a cam ring having an inner
circumferential surface on which tip-ends of the vanes slide by
rotation of the rotor; a side plate provided between a bottom
portion of the concave portion in the pump body and the cam ring; a
first pin provided so as to extend from the cam ring to the side
plate; and a second pin provided so as to extend from the side
plate to the pump body.
2. The vane pump according to claim 1, wherein the pump cartridge
comprises two or more second pins.
3. The vane pump according to claim 1, wherein the side plate has a
discharge port configured to guide working fluid that has been
discharged from pump chambers in the pump cartridge, the pump
chambers being defined by the rotor, the cam ring, and the adjacent
vanes, the pump body has: an arc-shaped high-pressure chamber into
which the working fluid that has been discharged from the pump
chambers is guided through the discharge port; and a discharge
passage configured to communicate with the high-pressure chamber
through a high-pressure port opening to the high-pressure chamber,
and the second pin is provided at a position where the second pin
does not penetrate through a part of the high-pressure chamber
extending in a circumferential direction between the discharge port
and the high-pressure port.
4. The vane pump according to claim 3, wherein the pump body is
formed with a raised portion, the raised portion being configured
to separate both ends of the high-pressure chamber, and the second
pin is provided so as to extend from the side plate to the raised
portion.
Description
[0001] TECHNICAL FIELD
[0002] The present invention relates to a vane pump.
BACKGROUND ART
[0003] JP2002-21742A discloses a vane pump that includes a pump
unit, a body, and a cover having a concave portion for
accommodating the pump unit. In this vane pump, a pump housing is
formed by the body and the cover.
[0004] In the vane pump disclosed in JP2002-21742A, the pump unit
has a cam ring, a rotor, vanes, a first side plate that covers a
side surface of each of the cam ring and the rotor on the body
side, a second side plate that covers a side surface of each of the
cam ring and the rotor on the cover side, and alignment pins for
aligning positions of the cam ring and the both side plates in the
circumferential direction by penetrating through insertion holes of
the cam ring and by being press-fitted into first press-fitting
holes of the first side plate and second press-fitting holes of the
second side plate. In the vane pump, tip-end portions of the
alignment pins serve as projected portions projected from the first
side plate, and the pump unit is aligned with respect to the cover
by press-fitting the projected portions into the press-fitting
holes of the cover.
SUMMARY OF INVENTION
[0005] With the vane pump disclosed in JP2002-21742A, the pump unit
is aligned by press-fitting the alignment pins penetrating through
the cam ring into the press-fitting holes of the pump cover.
However, because the press-fitting holes need to be formed by
avoiding the inner side of the cam ring in which the rotor is
arranged, there is a restriction on the positions of the
press-fitting holes. As the positions of the press-fitting holes
are restricted as described above, there is also a restriction on a
shape of a passage of working fluid formed in the pump cover.
[0006] An object of the present invention is to improve a degree of
freedom for designing a passage of working fluid in a vane
pump.
[0007] According to one aspect of the present invention, a vane
pump includes: a pump body having a concave portion; a pump cover
attached to the pump body, the pump cover being configured to seal
the concave portion; and a pump cartridge accommodated in an
accommodating space defined by the concave portion and the pump
cover. The pump cartridge includes: a rotor linked to a driving
shaft; a plurality of slits formed in the rotor in a radiating
pattern to open in an outer circumference of the rotor; a plurality
of vanes respectively inserted into the plurality of slits in a
slidable manner; a cam ring having an inner circumferential surface
on which tip-ends of the vanes slide by rotation of the rotor; a
side plate provided between a bottom portion of the concave portion
in the pump body and the cam ring; a first pin provided so as to
extend from the cam ring to the side plate; and a second pin
provided so as to extend from the side plate to the pump body.
BRIEF DESCRIPTION OF DRAWINGS
[0008] FIG. 1 is a sectional view of a vane pump according to an
embodiment of the present invention.
[0009] FIG. 2 is a plan view showing a pump cartridge of the vane
pump according to the embodiment of the present invention.
[0010] FIG. 3 is a plan view showing a bottom portion of a pump
body of the vane pump according to the embodiment of the present
invention.
[0011] FIG. 4 is a sectional view taken along a line A-A in FIG.
3.
[0012] FIG. 5 is a plan view showing a first modification of the
vane pump according to the embodiment of the present invention.
[0013] FIG. 6 is a plan view showing a second modification of the
vane pump according to the embodiment of the present invention.
DESCRIPTION OF EMBODIMENTS
[0014] A configuration of a vane pump 100 according to an
embodiment of the present invention will be described below with
reference to FIGS. 1 to 4.
[0015] The vane pump 100 is used as a fluid pressure source for a
fluid pressure apparatus mounted on a vehicle, such as, for
example, a power steering apparatus, a continuously variable
transmission, or the like. In this embodiment, the fixed
displacement vane pump 100 using working oil as working fluid will
be described. The vane pump 100 may also be a variable displacement
vane pump.
[0016] As shown in FIG. 1, the vane pump 100 has a pump body 30
that has a concave portion 30a, a pump cover 31 that is attached to
the pump body 30 and seals the concave portion 30a, and a pump
cartridge 10 that is accommodated in an accommodating space defined
by the concave portion 30a and the pump cover 31 and discharges the
working oil.
[0017] In the vane pump 100, motive force from an engine (not
shown) is transmitted to an end portion of a driving shaft 1, and a
rotor 2 linked to the driving shaft 1 is rotated. The rotor 2 is
rotated in the clockwise direction in FIG. 2.
[0018] As shown in FIGS. 1 and 2, the pump cartridge 10 includes a
plurality of vanes 3 that are provided so as to be able to
reciprocate in the radial direction relative to the rotor 2, a cam
ring 4 that accommodates the rotor 2 and has a cam face 4a serving
as an inner circumferential surface on which tip-ends of the vanes
3 slide by rotation of the rotor 2, a first side plate 5 serving as
a side plate that is arranged between the cam ring 4 and the bottom
portion of the concave portion 30a of the pump body 30 so as to be
in contact with the one side surface of the cam ring 4 (lower side
surface in FIG. 1), and a second side plate 6 that is arranged
between the cam ring 4 and the pump cover 31 so as to be in contact
with the other side surface of the cam ring 4 (upper side surface
in FIG. 1). Here, FIG. 2 is a plan view showing the pump cartridge
10 in a state in which the second side plate is removed.
[0019] As shown in FIG. 2, in the rotor 2, slits 7 having openings
in an outer circumferential surface of the rotor 2 are formed in a
radiating pattern with predetermined gaps. The vanes 3 are
respectively inserted into the slits 7 in a reciprocatable manner.
In the slits 7, back pressure chambers 8 into which discharge
pressure is guided are defined by base-end portions of the vanes
3.
[0020] The vanes 3 are pushed by the pressure of the working oil
guided to the back pressure chambers 8 in the directions in which
the vanes 3 are drawn out from the slits 7, and tip-end portions of
the vanes 3 are brought into contact with the cam face 4a of the
cam ring 4. With such a configuration, a plurality of pump chambers
9 are defined in the cam ring 4 by the outer circumferential
surface of the rotor 2, the cam face 4a of the cam ring 4, and the
adjacent vanes 3.
[0021] The cam ring 4 is an annular member in which the cam face 4a
on the inner circumference has a substantially oval shape. The cam
ring 4 has suction regions 4b in which volume of each pump chamber
9, which is defined between respective vanes 3 that slide on the
cam face 4a by the rotation of the rotor 2, is increased and
discharge regions 4c in which volume of each pump chamber 9 is
decreased. As described above, respective pump chambers 9 are
expanded/contracted by the rotation of the rotor 2. In this
embodiment, the cam ring 4 has two suction regions 4b and two
discharge regions 4c.
[0022] As shown in FIG. 1, the first side plate 5 and the second
side plate 6 are arranged in such a manner that both side surfaces
of each of the rotor 2 and the cam ring 4 are sandwiched, and
thereby, the pump chambers 9 are sealed.
[0023] As shown in FIG. 2, in the first side plate 5, two
arc-shaped discharge ports 20a and 20b, which open correspondingly
to the discharge regions 4c of the cam ring 4, are formed so as to
penetrate through the first side plate 5. The two discharge ports
20a and 20b are provided so as to face each other with the angular
intervals of 180.degree..
[0024] As shown in FIG. 3, an arc-shaped high-pressure chamber 21
is formed in the bottom portion of the concave portion 30a of the
pump body 30. The working oil that has been discharged from the
pump chambers 9 in the discharge regions 4c is guided into the
high-pressure chamber 21 through the discharge ports 20a and 20b of
the first side plate 5.
[0025] The pump body 30 is formed with a discharge passage 22 that
is in communication with the high-pressure chamber 21 through a
high-pressure port 22a opening to the high-pressure chamber 21 and
that supplies the working oil in the high-pressure chamber 21 to an
external hydraulic apparatus. The high-pressure port 22a opens to
the high-pressure chamber 21 at the position deviated from that of
each of the two discharge ports 20a and 20b in the circumferential
direction. In FIG. 1, illustrations of the high-pressure port 22a
and the discharge passage 22 are omitted.
[0026] The high-pressure chamber 21 is formed to have an arc-shaped
such that both ends of the high-pressure chamber 21 are separated
by a raised portion 35 that is raised from the pump body 30 towards
the first side plate 5 so as to become higher than the bottom
portion of the high-pressure chamber 21. Of two circumferential
direction regions R1 and R2 between the two discharge ports 20a and
20b, the raised portion 35 is provided in the circumferential
direction region R2 that differs from the circumferential direction
region R1 where the high-pressure port 22a is provided. As the
raised portion 35 is provided, flows of the working oil flowing in
the directions (the directions approaching the raised portion 35)
opposite from the directions approaching the high-pressure port 22a
from respective discharge ports 20a and 20b (the directions of
arrows in FIG. 3) are prevented. Therefore, each of the flows of
the working oil guided from the discharge ports 20a and 20b to the
high-pressure chamber 21 tends to flow in one direction (the
directions of the arrows in FIG. 3) towards the high-pressure port
22a directly without being directed towards the raised portion
35.
[0027] The raised portion 35 may be brought into contact with the
first side plate 5, or as shown in FIG. 4, the raised portion 35
may be provided such that a communication gap 36 is formed between
the raised portion 35 and the first side plate 5. In other words,
the high-pressure chamber 21 may not be completely divided by the
raised portion 35, and the raised portion 35 may connect the both
ends of the high-pressure chamber 21 through the communication gap
36 formed between the raised portion 35 and the first side plate 5.
Even in this case, because the communication gap 36 having the
cross-sectional area that is smaller than that of the high-pressure
chamber 21 imparts resistance to the flow of the working oil, the
working oil guided from the discharge ports 20a and 20b to the
high-pressure chamber 21 is less likely to flow towards the raised
portion 35 and tends to directly flow into the high-pressure
chamber 21 towards the high-pressure port 22a. As described above,
as used herein, the phrase "the raised portion 35 that separates
the both ends of the high-pressure chamber 21" is not restricted to
that completely divides the high-pressure chamber 21, and the
phrase also includes the raised portion 35 that allows
communication between the both ends of the high-pressure chamber 21
but makes the working oil to flow in one direction towards the
high-pressure port 22a more easily.
[0028] In addition, in the first side plate 5, two arc-shaped back
pressure ports 23 that are in communication with the high-pressure
chamber 21 are formed (see FIG. 1). The back pressure ports 23
respectively communicate with the back pressure chambers 8. With
such a configuration, the working oil in the high-pressure chamber
21 is guided into the back pressure chambers 8 through the back
pressure ports 23.
[0029] In the second side plate 6, two arc-shaped suction ports
(not shown) that correspondingly open to the two suction regions 4b
of the cam ring 4 (see FIG. 2) and that guide the working oil to
the pump chambers 9 are formed. In addition, in the pump cover 31,
a suction passage (not shown) through which the tank (not shown) is
communicated with the suction ports and that guides the working oil
in the tank to the pump chambers 9 through the suction ports is
formed.
[0030] In the vane pump 100, by the rotation of the rotor 2, the
working oil is sucked from the tank through the suction ports and
the suction passage to the respective pump chambers 9 in the
suction regions 4b of the cam ring 4, and the working oil is
discharged to the outside from the respective pump chambers 9 in
the discharge regions 4c of the cam ring 4 through the discharge
ports 20a and 20b and the discharge passage 22. As described above,
in the vane pump 100, the working oil is supplied/discharged by
expansion/contraction of the respective pump chambers 9 caused by
the rotation of the rotor 2.
[0031] The pump cartridge 10 further has two first pins 11 that are
provided so as to extend from the first side plate 5 to the second
side plate 6 through the cam ring 4 (see FIG. 1) and two second
pins 12 that are provided so as to extend from the first side plate
5 to the pump body 30 (see FIG. 4).
[0032] As shown in FIG. 1, the first pins 11 penetrate through the
cam ring 4, and both ends thereof are respectively press-fitted
into upper-side first press-fitting holes 11a formed in the second
side plate 6 and lower-side first press-fitting holes 11b formed in
the first side plate 5. Thereby, integration of the pump cartridge
10 is achieved. The two first pins 11 are symmetrically arranged
with respect to the center of the cam ring 4 (see FIG. 2). The two
first pins 11 do not respectively penetrate through the first and
second side plates 5 and 6. In other words, the both ends of the
first pins 11 do not project out from end surfaces of the first and
second side plates 5 and 6.
[0033] As shown in FIG. 4, both ends of the second pins 12 are
respectively press-fitted into upper-side second press-fitting
holes 12a formed in the first side plate 5 and lower-side second
press-fitting holes 12b formed in the raised portion 35. As shown
in FIG. 3, the second pins 12 are provided so as to avoid and so as
not to penetrate a part of the high-pressure chamber 21 formed
between the two discharge ports 20a and 20b and the high-pressure
port 22a. By providing the second pins 12, the pump cartridge 10 is
aligned with respect to the pump body 30.
[0034] Because the raised portion 35 is provided, the working oil
guided from the discharge ports 20a and 20b scarcely flows towards
the raised portion 35 and mainly flows directly towards the
high-pressure port 22a through a part of the high-pressure chamber
21 formed between the discharge ports 20a and 20b and the
high-pressure port 22a. Therefore, if the second pins 12 are
provided so as to penetrate through a part of the high-pressure
chamber 21 formed between the discharge ports 20a and 20b and the
high-pressure port 22a, the flow-passage cross-sectional area is
reduced and the flow of the working oil discharged from the pump
chambers 9 is disturbed.
[0035] In contrast, in the vane pump 100, as shown in FIG. 3,
because the second pins 12 are provided in the raised portion 35,
the flow of the working oil is disturbed by the second pins 12.
Thus, by providing the second pins 12 in the raised portion 35, it
is possible to align the pump cartridge 10 with respect to the pump
body 30 without affecting the flow of the working oil discharged
from the pump chambers 9. In addition, because there is no need to
form an alignment hole of the pump cartridge 10 in the pump cover
31, the passage shape of the suction passage formed in the pump
cover 31 is not restricted by the alignment hole. Thus, the degree
of freedom for designing the passage formed in the pump cover 31 is
improved. With such a configuration, because it is possible to
optimize layout of the suction passage and increase the
cross-sectional area, and thereby, the sucking property thereof can
be improved, it is possible to suppress occurrence of vibration and
cavitation of the vane pump 100.
[0036] In addition, in a case in which a single second pin 12 is
provided, the pump cartridge 10 may be rotated about the second
pins 12 by an angle corresponding to a gap formed between the pump
cartridge 10 and the concave portion 30a of the pump body 30 in the
radial direction. In contrast, in the vane pump 100, because two
second pins 12 are provided, the rotation of the pump cartridge 10
about the second pins 12 is reliably prevented. In cases such as
there is no risk of rotation of the pump cartridge 10 about the
second pins 12, the single second pin 12 may be provided. In
addition, three or more second pins 12 may be provided.
[0037] Next, a modification of the above-mentioned embodiment will
be described with reference to FIGS. 5 and 6.
[0038] In the above-mentioned embodiment, the pump cartridge 10 has
the second side plate 6 that is provided between the pump cover 31
and the cam ring 4. Instead of this configuration, the pump
cartridge 10 may not have the second side plate 6, and the pump
cover 31 may be brought into direct contact with the cam ring 4. In
this case, the first pins 11 are provided so as to extend from the
cam ring 4 to the first side plate 5, and the both ends thereof are
respectively press-fitted into the cam ring 4 and the first side
plate 5. In other words, the first pins 11 may be provided such
that one end of the first pins 11, which is press-fitted into the
cam ring 4, does not penetrate through the cam ring 4 and does not
project out from the cam ring 4 towards the pump cover 31.
[0039] In addition, in the above-mentioned embodiment, the
high-pressure port 22a opens to the high-pressure chamber 21 at the
position deviated from that of each of the two discharge ports 20a
and 20b in the circumferential direction. Instead of this
configuration, as shown in FIG. 5, the high-pressure port 22a may
open to the high-pressure chamber 21 at the position facing against
the one discharge port 20a. Even in this case, the working oil
guided from the other discharge port 20b passes through the
high-pressure chamber 21 extending between the discharge port 20b
and the high-pressure port 22a in the circumferential direction
region R1. Therefore, even when the second pins 12 are provided at
the positions where the raised portion 35 is formed in the
circumferential direction region R2 at the opposite side of the
circumferential direction region R1, the flow of the working oil is
not disturbed. Thus, the similar effects as those of the
above-mentioned embodiment are afforded.
[0040] In addition, in the above-mentioned embodiment, the second
pins 12 are provided at the positions where the raised portion 35
is formed. Instead of this configuration, the second pins 12 may be
provided at any positions as long as the flow of the working oil
flowing from the discharge ports 20a and 20b to the high-pressure
port 22a is not disturbed. Specifically, as shown in FIG. 5, the
second pins 12 may be provided at the positions where the second
pins 12 do not penetrates through the high-pressure chamber 21
extending between each of the two discharge ports 20a and 20b and
the high-pressure port 22a. In other words, the second pins 12 may
be provided at any positions in the circumferential direction
region R2, where the raised portion 35 is provided, at the opposite
side of the circumferential direction region R1, where the
high-pressure port 22a is provided. Even in this case, because the
flows of the working oil flowing from the discharge ports 20a and
20b to the high-pressure port 22a are not disturbed by the second
pins 12, the similar effects as those of the above-mentioned
embodiment are afforded.
[0041] In addition, in the above-mentioned embodiment, the vane
pump is the so-called balanced vane pump 100 in which the cam ring
has the two discharge regions and the two suction regions. Instead,
the vane pump may be a so-called unbalanced vane pump 200 in which
the cam ring has one discharge region and one suction region.
[0042] More specifically, in the vane pump 200, the first side
plate is formed with a single suction port (not shown) that opens
correspondingly to the suction region. In addition, the second side
plate is formed with a single discharge port 20c that opens
correspondingly to the discharge region.
[0043] In the pump body 30, as shown in FIG. 6, an arc-shaped
high-pressure chamber 121 is formed at the position corresponding
to the discharge port 20c.
[0044] The second pins 12 are provided at positions where the
second pins 12 avoid and do not penetrate through a part of the
high-pressure chamber 121 extending in the circumferential
direction between the discharge port 20c and the high-pressure port
22a. With such a configuration, even with an unbalanced vane pump,
similarly to the above-mentioned embodiment, it is possible to
align the pump cartridge 10 without disturbing the flow of the
working oil flowing from the discharge port 20c to the
high-pressure port 22a by the second pins 12.
[0045] According to the embodiment mentioned above, the advantages
described below are afforded.
[0046] In the vane pump 100, the pump cartridge 10 integration of
which is achieved with the first pins 11 is aligned with respect to
the pump body 30 by the second pins 12 that are provided so as to
extend from the first side plate 5 to the pump body 30. Thus,
because there is no need to form the alignment hole for the pump
cartridge 10 in the pump cover 31, the shape of the passage of the
working oil formed in the pump cover 31 is not restricted by the
alignment hole. Therefore, the degree of freedom for designing the
passage of the working oil formed in the pump cover 31 is
improved.
[0047] In addition, because the degree of freedom for designing the
passage is improved, it is possible to optimize layout of the
suction passage and to increase the cross-sectional area of the
suction passage, and thereby, the sucking property thereof can be
improved. Therefore, it is possible to suppress occurrence of
vibration and cavitation of the vane pump 100.
[0048] In addition, in the vane pump 100, because the second pins
12 are provided in the raised portion 35, the flow of the working
oil discharged from the pump chambers 9 is not disturbed by the
second pins 12. Thus, it is possible to align the pump cartridge 10
without affecting the flow of the working oil discharged from the
pump chambers 9.
[0049] In addition, in the vane pump 100, because the two second
pins 12 are provided, the rotation of the pump cartridge 10
relative to the pump body 30 is also prevented.
[0050] The configurations, operations, and effects of the
embodiment of the present invention will be collectively described
below.
[0051] The vane pumps 100 and 200 include: the pump body 30 that
has the concave portion 30a; the pump cover 31 that is attached to
the pump body 30 and seals the concave portion 30a; and the pump
cartridge 10 that is accommodated in an accommodating space defined
by the concave portion 30a and the pump cover 31. The pump
cartridge 10 includes: the rotor 2 that is linked to the driving
shaft; the plurality of slits 7 that have opening in the outer
circumference of the rotor 2 and are formed in a radiating pattern;
the plurality of vanes 3 that are respectively inserted into the
plurality of slits 7 in a slidable manner; the cam ring 4 that has
the cam face 4a on which the tip-ends of the vanes 3 slide by the
rotation of the rotor 2; the first side plate 5 that is provided
between the bottom portion of the concave portion 30a in the pump
body 30 and the cam ring 4; the first pins 11 that are provided so
as to extend from the cam ring 4 to the first side plate 5; and the
second pins 12 that are provided so as to extend from the first
side plate 5 to the pump body 30.
[0052] In this configuration, the pump cartridge 10 integration of
which is achieved by the first pins 11 is aligned with respect to
the pump body 30 by the second pins 12 that are provided so as to
extend from the first side plate 5 to the pump body 30. Thus,
because there is no need to form the alignment hole for the pump
cartridge 10 in the pump cover 31, the shape of the passage of the
working oil formed in the pump cover 31 is not restricted by the
alignment hole. Therefore, the degree of freedom for designing the
passage of the working oil in the vane pumps 100 and 200 is
improved.
[0053] In addition, in the vane pumps 100 and 200, the pump
cartridge 10 includes two or more second pins 12.
[0054] According to this configuration, the rotation of the pump
cartridge 10 relative to the pump body 30 can be prevented.
[0055] In addition, in the vane pumps 100 and 200, the first side
plate 5 has the discharge ports 20a, 20b, and 20c that guide the
working fluid discharged from the pump chambers 9 in the pump
cartridge 10, which are defined by the rotor 2, the cam ring 4, and
the adjacent vanes 3; the pump body 30 has the arc-shaped
high-pressure chambers 21 and 121 into which the working oil that
has been discharged from the pump chambers 9 is guided through the
discharge ports 20a, 20b, and 20c and has the discharge passage 22
that is in communication with the high-pressure chamber 21 through
the high-pressure port 22a opening to the high-pressure chambers 21
and 121; and the second pins 12 are provided at the positions where
the second pins 12 do not penetrate through a part of the
high-pressure chamber 21 extending in the circumferential direction
between each of the discharge ports 20a and 20b and the
high-pressure port 22a.
[0056] In addition, in the vane pumps 100 and 200, the pump body 30
is formed with the raised portion 35 that separates the both ends
of the high-pressure chamber 21, and the second pins 12 are
provided so as to extend from the first side plate 5 to the raised
portion 35.
[0057] According to these configurations, because the second pins
12 do not penetrate through a part of the high-pressure chamber 21
extending in the circumferential direction between the discharge
ports 20a, 20b, and 20c and the high-pressure port 22a, the flow of
the working oil guided from the discharge ports 20a, 20b, and 20c
to the high-pressure port 22a is not disturbed by the second pins
12. Therefore, it is possible to align the pump cartridge 10
without affecting the flow of the working oil.
[0058] Embodiments of this invention were described above, but the
above embodiments are merely examples of applications of this
invention, and the technical scope of this invention is not limited
to the specific constitutions of the above embodiments.
[0059] This application claims priority based on Japanese Patent
Application No. 2015-183260 filed with the Japan Patent Office on
Sep. 16, 2015, the entire contents of which are incorporated into
this specification.
* * * * *