U.S. patent application number 11/086450 was filed with the patent office on 2005-09-22 for motor pump assembly.
This patent application is currently assigned to SIEMENS AKTIENGESELLSCHAFT. Invention is credited to Tupy, Matthias.
Application Number | 20050207914 11/086450 |
Document ID | / |
Family ID | 34924519 |
Filed Date | 2005-09-22 |
United States Patent
Application |
20050207914 |
Kind Code |
A1 |
Tupy, Matthias |
September 22, 2005 |
Motor pump assembly
Abstract
The invention relates to a motor pump assembly having a motor
housing, a pump housing, and an electronic component housing
located one behind the other. The pump housing has a hole through
which at least two mutually electrically insulated electric leads
surrounded by an insulating sleeve are ducted from the motor
housing to the electronic component housing. The electric leads,
which are preferably embodied as flat connector lugs, are provided
inside the insulating sleeve with an offset.
Inventors: |
Tupy, Matthias; (Gerbrunn,
DE) |
Correspondence
Address: |
SIEMENS SCHWEIZ
I-44, INTELLECTUAL PROPERTY
ALBISRIEDERSTRASSE 245
ZURICH
CH-8047
CH
|
Assignee: |
SIEMENS AKTIENGESELLSCHAFT
MUNICH
DE
|
Family ID: |
34924519 |
Appl. No.: |
11/086450 |
Filed: |
March 23, 2005 |
Current U.S.
Class: |
417/410.1 ;
417/423.7 |
Current CPC
Class: |
F04B 53/16 20130101;
F04B 17/03 20130101; F04B 1/0404 20130101; B60T 8/368 20130101 |
Class at
Publication: |
417/410.1 ;
417/423.7 |
International
Class: |
F04B 017/00 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 19, 2004 |
EP |
04 006 710.0 |
Claims
What is claimed is:
1. A motor pump assembly comprising: a motor housing, a pump
housing arranged behind the motor housing an electronic component
housing arranged behind the pump housing, and at least two mutually
electrically insulated electric leads surrounded by an insulating
sleeve ducted from the motor housing through the pump housing to
the electronic component housing, wherein the electric leads are
each provided inside the insulating sleeve with an offset.
2. The motor pump assembly according to claim 1, wherein the
electric leads are flat connector lugs.
3. The motor pump assembly according to claim 1, wherein the
insulating sleeve projects beyond the pump housing in an axial
direction and the offset is located in an area of the insulating
sleeve projecting in the axial direction beyond the pump
housing.
4. The motor pump assembly according to claim 1, wherein the
insulating sleeve projects beyond the pump housing in an axial
direction on both sides and an offset is located in both areas of
the insulating sleeve projecting in the axial direction beyond the
pump housing.
5. The motor pump assembly according to claim 3, wherein mutual
spacing of the electric leads is smaller in an area of the pump
housing than the mutual spacing of the electric leads outside the
pump housing after an offset has been provided.
6. The motor pump assembly according to claim 4, wherein mutual
spacing of the electric leads is smaller in an area of the pump
housing than the mutual spacing of the electric leads outside the
pump housing after an offset has been provided.
7. The motor pump assembly according to claim 1, wherein the
electric leads inside the insulating sleeve are each provided with
a step so that a width of the electric leads is different at two
axial ends of the insulating sleeve.
8. The motor pump assembly according to claim 1, wherein electric
leads, including the insulating sleeve, form a single-piece
component together with the motor housing.
9. The motor pump assembly according to claim 1, wherein the
electric leads are arranged inserted into a mating connector
provided on the motor housing.
10. The motor pump assembly according to claim 1, wherein electric
leads, including the insulating sleeve, form a single-piece
component together with the electronic component housing.
11. The motor pump assembly according to claim 1, wherein electric
leads are arranged plugged into a mating connector provided on the
electronic component housing.
12. An electric connecting device having at least two mutually
electrically insulated electric leads surrounded by an insulating
sleeve, which leads are each provided inside the insulating sleeve
with an offset.
13. The electric connecting device according to claim 12, wherein
the electric leads are flat connector lugs.
14. The electric connecting device according to claim 12, wherein
the electric leads are arranged inside the insulating sleeve with a
step so that a width of the electric leads is different at two
axial ends of the insulating sleeve.
15. The electric connecting device according to claim 12, wherein
the electric leads project beyond the insulating sleeve in an axial
direction.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The present application claims priority to European patent
application 04006710.0, filed Mar. 19, 2004, which is herein
incorporated by reference.
BACKGROUND OF THE INVENTION
[0002] The invention relates to a motor pump assembly having a
motor housing, a pump housing, and an electronic component housing
located one behind the other in an axial sandwich arrangement. A
motor pump assembly of said type can be employed in particular in
anti-skid vehicle braking devices.
[0003] An electromotor pump assembly in which the electromotor
housing is contacted with the pump housing is known already from EP
0 698 183 B1. In said known assembly a bearing plate which forms a
seal and to which brushes are secured is provided on the contact
points between the electromotor housing and the pump housing. The
pump housing is provided with a through-hole which accommodates an
electric connecting component embodied as a loom of cables. Said
loom of cables ducted through the pump housing is contacted by
means of a plug-in connection on the side of the pump housing
remote from the motor housing with an electronic control and
regulating means acting as a power supply. According to a further
embodiment the cables of the power supply are emplaced in a pressed
screen extrusion-coated with plastic. The plastic is
injection-molded onto the housing of the electronic regulating unit
so that the housing of the electronic regulating unit and the cable
duct form one integral part. Provided on the end of the cable duct
facing the motor is a plug-in connector plugged into a mating
connector of the end shield. The cable duct can alternatively also
be implemented as a single part having plug-in connectors at both
ends. One of said plug-in connectors contacts the mating connector
on the electromotor while the other plug-in connector contacts a
mating connector of the electronic regulating unit. According to a
further alternative embodiment the cable duct can be produced from
two parts each of which has a wire. The two parts are embodied
mutually symmetrically and can be plugged together to form a cable
duct. The individual elements are for this purpose provided with
mutually engaging lugs or, as the case may be, recesses.
[0004] An electrohydraulic unit for regulating braking fluid
pressure is known from WO 96/28 327 A1. Said known unit has a
hydraulic block on one of whose sides an electromotor is mounted.
The electric connections of the electromotor extend through the
hydraulic block up to its opposite side, where they are connected
to electric leads of a built-on controller or manifold plug. The
cited electric leads are helically wound around guiding pins. Said
pins project during mounting into blind bores in the hydraulic
block in order to position the built-on controller or manifold plug
on the hydraulic block, so that free ends of the electric leads are
placed in fork-shaped ends of the connecting pins before the
built-on controller or manifold plug covers the connections.
[0005] A motor pump assembly having a motor housing, a pump
housing, and an electronic component housing located one behind the
other in an axial sandwich arrangement is known from WO 02/057 121
A1. At least two mutually electrically insulated plug-type supply
leads or, as the case may be, control leads are ducted from the
motor housing through the pump housing to the electronic component
housing. The plug-type supply leads or, as the case may be, control
leads are permanently secured on the motor housing side in a
receptacle, in particular a brush plate, and otherwise move freely
diagonally to their longitudinal extent at least in terms of
tolerance compensating. The plug-type supply leads or, as the case
may be, control leads are parts, in particular single-piece, bent
parts, formed by a combined cutting and bending process, of a
pressed screen accommodated by the receptacle, in particular the
brush plate. The plug-type supply leads or, as the case may be,
control leads are embedded in an elastic insulating sleeve and
contacted at their free ends facing away from the motor housing
with an electronic unit in the electronic component housing, in
particular a printed circuit board.
SUMMARY OF THE INVENTION
[0006] The object of the invention is to disclose a way of
minimizing the space requirements for through-ducting the leads in
a motor pump assembly in which electric leads are ducted through
the pump housing.
[0007] Said object is achieved by means of a motor pump assembly
exhibiting the features indicated in claim 1. Advantageous
embodiments and developments of the invention will emerge from the
dependent claims 2 to 10. Claims 11 to 14 relate to an electric
connecting device that can be employed in connection with the
invention.
[0008] The particular advantages of the invention are that, through
an offset in the electric leads inside the insulating sleeve, the
electric leads can in the area of the pump housing be spaced less
far apart than the electric leads need to be for contacting with
the motor and/or the electronic components. The spacing necessary
between the electric leads for contacting with the motor and/or the
electronic components can be produced by means of the cited offset
in the electric leads, which are preferably embodied as flat
connector lugs.
[0009] Use is advantageously made herein of the different
requirements prevailing inside and outside the pump housing. Inside
the pump housing it is necessary to ensure that a specified minimum
safety clearance is constantly maintained between the electric
leads and the edges of the pump through-hole in order to avoid
voltage punctures. This is ensured by selecting an adequate
thickness for the insulating sleeve. It is not necessary to
maintain a safety clearance of said type outside the pump housing.
The absence of this requirement is exploited according to the
present invention to provide an offset in the electric leads
outside the pump housing of such a type that the spacing between
the electric leads inside the insulating sleeve is increased. The
fact that in this area the spacing between the electric leads and
the outer edge of the insulating sleeve is herein less than the
above-cited safety clearance is inconsequential as the offset in
the electric leads is provided outside the area of the pump
housing.
[0010] A major advantage of the invention is that the offset in the
electric leads can be provided as a function of respectively
prevailing individual customer requirements. The manufacturers of
motors as well as the manufacturers of the electronic components in
particular employ variously dimensioned mating connectors on the
motor or, as the case may be, electronic components, in particular
mating connectors in which the spacing of the electric leads
requiring to be contacted varies in extent. These differing
requirements can be met by means of an offset in the leads that is
respectively adapted. Said offset can be advantageously provided on
one side in the direction of the motor, on one side in the
direction of the electronic components, or on both sides. It is
important for the outside diameter of the insulating sleeve that
must be ducted completely through the pump housing when the motor,
pump, and electronic components are assembled to be in accordance
on both sides of the offset or, as the case may be, offsets so that
ducting of the insulating sleeve through the hole in the pump
housing is in no way impeded.
[0011] According to an advantageous development of the invention
the electric leads of the insulating sleeve can each be provided
with a step so that the width of the electric leads is different at
the two axial ends of the insulating sleeve. Requirements due to
different types of mating connector can be met by means of this
measure also.
[0012] In a further advantageous embodiment of the invention the
electric leads, including the insulating sleeve, are implemented
together with the motor housing as a single-piece component. When
the entire assembly is being assembled, the electric leads,
including the insulating sleeve, can in this case be inserted
through a hole in the pump housing and contacted with the
electronic components on the other side of the pump housing using,
for example, a mating connector.
[0013] In another advantageous embodiment of the invention the
electric leads, including the insulating sleeve, are implemented
together with the electronic component housing as a single-piece
component. When the entire assembly is being assembled, the
electric leads, including the insulating sleeve, can in this case
be inserted through a hole in the pump housing and contacted with
the motor housing on the other side of the pump housing using, for
example, a mating connector.
[0014] In a further alternative embodiment of the invention the
electric leads, including the insulating sleeve, are implemented as
a single-piece component. When the entire assembly is being
assembled, said component can be inserted through a hole in the
pump housing, no matter from which side, then connected on both
sides to the motor housing or, as the case may be, electronic
component housing using in each case a mating connector.
[0015] By means of a respectively suitable offset in the electric
leads, the spacing between the leads, which are preferably embodied
as flat connector lugs, can be accommodated to the respectively
present mating connector. The outside diameter of the insulating
sleeve will always remain the same despite the offset provided, so
that ducting through the hole in the pump housing of the insulating
sleeve containing the electric leads will not be adversely affected
and the hole in the pump housing can be kept small.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0016] Further advantageous characteristics of the invention will
emerge from the exemplary explanation thereof presented with the
aid of the drawings.
[0017] FIG. 1 is an axial part sectional view of a fully assembled
motor pump assembly,
[0018] FIG. 2 shows the motor housing as a preassembly unit having
a supply lead connection or, as the case may be, control lead
connection to the electronic component housing,
[0019] FIG. 3 is a sketch illustrating a first embodiment of the
invention,
[0020] FIG. 4 is a sketch illustrating a development of the
invention,
[0021] FIG. 5 is a sketch illustrating a second embodiment of the
invention,
[0022] FIG. 6 is a sketch illustrating a third embodiment of the
invention, and
[0023] FIG. 7 is a sketch illustrating a fourth embodiment of the
invention.
DETAILED DESCRIPTION OF THE INVENTION
[0024] The invention relates to a motor pump assembly having a
motor housing, a pump housing, and an electronic component housing
located one behind the other in an axial sandwich arrangement. A
motor pump assembly of said type can be employed in particular in
anti-skid vehicle braking devices. In the motor pump assembly
according to the invention the electric leads, which connect the
brush system located inside the motor housing to the control and
regulating unit located inside the electronic component housing,
are ducted through a hole in the pump housing.
[0025] FIG. 1 is an axial part sectional view of a complete motor
pump assembly that can be employed for, for example, an anti-skid
vehicle braking device. A pump housing 2 of a high-pressure pump
for a hydraulic brake fluid is flange-mounted by one of its end
faces in a sealed manner to a pot-shaped motor housing 1 of a
commutator electromotor. An electronic component housing 3 is
attached to the other end face of the pump housing 2. Said
electronic component housing contains a connection unit implemented
in the form of, for example, a printed circuit board, in particular
a supply unit or, as the case may be, control unit for the
commutator electromotor.
[0026] The motor housing 1 is closed in the area of the pot edge
side by a brush plate 6 from which the commutator electromotor's
rotor shaft 7 supported by a bearing 8 protrudes with one shaft
end. This bears an eccentric 9 by which pump plungers of the
high-pressure pump are driven.
[0027] Lug-shaped supply leads or, as the case may be, control
leads 4.1 and 4.2, which, as can also be seen from FIG. 2, run
inside the pump housing 2 substantially perpendicularly to the
plane of the brush plate 6, serve to make the electric connection
between the electronic component housing 3 and the electric
components, in particular the brushes, accommodated by the brush
plate 6.
[0028] As can be seen in FIG. 2, the lug-type electric leads 4.1
and 4.2 surrounded by an insulating sleeve 5 are secured in
position in the brush plate by their ends that are on the motor
housing side in the sense of a preassembly structural unit, for
example in the form of being a single piece with a pressed screen
injection-molded into the brush plate. Said screen serves to
connect the components accommodated by the brush plate and also the
lug-type electric connections 4.1 and 4.2 initially co-pressed in
the plane of the pressed screen which are bent and ducted
perpendicularly out of said plane.
[0029] The insulating sleeve 5 serves to electrically insulate the
electric leads 4.1 and 4.2. It is embodied elastically, emplaced
axially over the electric leads 4.1 and 4.2, and secured in
position by means of a catch. The elasticity of the insulating
sleeve 5 ensures that the lead ends facing away from the motor
housing can move evasively in a tolerance compensating manner
diagonally to the direction of their axial extent when the motor
housing 1, the pump housing 2, and the electronic component housing
3 are being assembled, despite any mutual displacement that may
occur in the housing parts being assembled. Problem-free ducting
through the hole in the pump housing and through the end face of
the electronic component housing is ensured thereby.
[0030] In the embodiment shown in FIG. 2, distortion-free plug-in
connecting of the electric leads 4.1 and 4.2 between the brush
plate in the motor housing right through the pump housing to the
electronic component housing is possible employing a simple
production and assembly technique despite the axial sandwich-type
assembly of the motor housing, pump housing, and electronic
component housing. The cited electric leads are here secured in
position in the brush plate in the manner of a fixed connector by
their ends on the side of the motor housing in the form of a
preassembly component unit, in particular of a bent single-piece
part of a pressed screen injection-molded in said brush plate. At
their free connector ends surrounded by an elastic insulating
sleeve they can furthermore move in a tolerance compensating manner
diagonally to their axial entry extent.
[0031] The spacing between the electric leads inside of the
insulating sleeve 5 and the spacing between each of said leads and
the edge of the hole through the pump housing must be kept as small
as possible so that the diameter of the hole through the pump
housing can be kept as small as possible. The only factor that
needs to be taken into account when said spacing is being
dimensioned is that no voltage punctures must occur. This is
ensured by selecting an appropriate thickness for the material of
the insulating sleeve 5.
[0032] The electric leads according to the present invention have
an offset in order to make a plug-in contact possible with a mating
connector on the motor housing and/or the electronic component
housing despite the narrow ducting of the electric leads in the
area of the pump housing. Said offset is advantageously provided
outside the area of the pump housing but still inside the area of
the insulating sleeve. This is explained in more detail below with
the aid of several embodiments.
[0033] FIG. 3 is a sketch illustrating a first embodiment of the
invention. According to said embodiment an electric connecting
device having the electric leads 4.1 and 4.2 embodied in the form
of flat connector lugs is ducted through a hole in the pump housing
2. Said electric leads run inside the insulating sleeve 5. The end
of the insulating sleeve 5 on the side of the motor housing is
aligned with the end face of the pump housing 2 on the side of the
motor housing. The end of the insulating sleeve 5 on the side of
the electronic components projects beyond the end face of the pump
housing 2 on the side of the electronic components. Inside the area
of the pump housing 2 the electric leads 4.1 and 4.2 have a mutual
spacing a2. The cited leads at the end of the insulating sleeve 5
on the side of the motor housing are ducted out of said sleeve
having said mutual spacing and can be inserted into a mating
connector on the motor housing whose mating connector contacts
likewise have the mutual spacing a2. Inside the area of the pump
housing the electric leads 4.1 and 4.2 have a constant minimum
spacing d1 from the edge of the hole of the pump housing. Said
minimum spacing is necessary to prevent the occurrence of voltage
punctures during operation. Outside the area of the pump housing,
but still inside the area of the insulating sleeve, the lead 4.1 is
provided with an offset K1 and the lead 4.2 is provided with an
offset K2. Said offsets ensure that the electric leads 4.1 and 4.2
will have a mutual spacing a1 when exiting the insulating sleeve 5
on the side of the electronic components, with the following
applying:
a2<a1.
[0034] The fact that owing to said offsets the spacing d2 of the
leads 4.1 and 4.2 from the outer edge of the insulating sleeve 5 is
less than d1 is inconsequential as there is no risk of voltage
punctures in this area, which is outside the area of the pump
housing.
[0035] The electric leads or, as the case may be, flat connector
lugs exiting from the insulating sleeve 5 with the spacing a1 can
be plugged into a mating connector of the electronic component
housing whose mating connector contacts likewise have the spacing
a1.
[0036] The ultimate effect of the described offset in the electric
leads is that said leads can be ducted close together in the area
of the pump housing, as a result of which the hole through the pump
housing can be kept small, and that the leads can nevertheless be
contacted with an existing mating connector whose mating connector
contacts have a mutual spacing greater than that with which the
leads are ducted in the area of the pump housing.
[0037] As can further be seen from FIG. 3, the outside diameter of
the insulating sleeve 5 remains constant despite the offset in the
leads so that insertion of the electric connecting device through
the hole in the pump housing is not adversely affected.
[0038] FIG. 4 is a sketch illustrating an advantageous development
of the invention. According to said development the electric leads
4.1 and 4. 2 contain a step S in the area of the insulating sleeve
5 and also in the area of the pump housing 2. The width of the
electric leads is reduced by said step S from b1 to b2. This
measure makes it possible to contact the cited leads with a mating
connector which is on the side of the motor housing and whose
mating connector contacts have a width b2.
[0039] This change in the width of the electric leads can be
effected independently of an offset in the leads. Said change in
the width of the electric leads also requires adherence to the
minimum spacing from the edge of the hole in the pump housing
necessary to avoid voltage punctures.
[0040] FIG. 5 is a sketch illustrating a second embodiment of the
invention. According to said embodiment an electric connecting
device having the electric leads 4.1 and 4.2 embodied in the form
of flat connector lugs is ducted through a hole in the pump housing
2. Said electric leads run inside an insulating sleeve 5. Both the
end of the insulating sleeve 5 on the side of the motor housing and
the end of the insulating sleeve 5 on the side of the electronic
components project beyond the respective end face of the pump
housing 2. Inside the area of the pump housing the electric leads
4.1 and 4.2 have a mutual spacing a2. Inside the area of the pump
housing the electric leads 4.1 and 4.2 furthermore have a constant
minimum spacing d1 from the edge of the hole of the pump housing.
Said minimum spacing is necessary to prevent the occurrence of
voltage punctures during operation. Outside the area of the pump
housing, but still inside the area of the insulating sleeve 5, the
lead 4.1 is provided with offsets K1 and K3 and the lead 4.2 is
provided with offsets K2 and K4. Said offsets ensure that the
electric leads 4.1 and 4.2 will have a mutual spacing a1 when
exiting the insulating sleeve 5 on the side of the electronic
components, with the following applying:
a2<a1.
[0041] The fact that owing to said offsets the spacing d2 of the
leads 4.1 and 4.2 from the outer edge of the insulating sleeve 5 is
less than d1 is inconsequential as there is no risk of voltage
punctures in this area, which is outside the area of the pump
housing.
[0042] The electric leads or, as the case may be, flat connector
lugs exiting from the insulating sleeve 5 with the spacing a1 can
be inserted into a respective mating connector of the electronic
component housing or, as the case may be, motor housing whose
mating connector contacts likewise have the spacing a1.
[0043] The effect of the described offsets in the electric leads is
that said leads can be ducted close together in the area of the
pump housing, as a result of which the hole through the pump
housing can be kept small, and that the leads can nevertheless be
contacted on both sides with a respectively existing mating
connector whose mating connector contacts have a mutual spacing
greater than that with which the leads are ducted in the area of
the pump housing.
[0044] As can further be seen from FIG. 5, the outside diameter of
the insulating sleeve 5 remains constant despite the offsets in the
leads so that insertion of the electric connecting device through
the hole in the pump housing is not adversely affected.
[0045] FIG. 6 is a sketch illustrating a third embodiment of the
invention. In this embodiment, as already explained above in
connection with FIG. 2, the electric connecting device consisting
of the insulating sleeve 5 and the electric leads 4.1 and 4.2 forms
a structural unit together with the motor housing 1. It can further
be seen from FIG. 6 that the electric leads 4.1 and 4.2 are
provided in the vicinity of the end of the insulating sleeve 5 on
the side of the electronic components with an offset K1 or, as the
case may be, K2. The mutual spacing of the electric leads is
expanded from a2 to a1 by said offset. The electric leads 4.1 and
4.2 exit the insulating sleeve 5 with this expanded spacing a1 and
can be inserted into a mating connector of the electronic component
housing whose mating connector contacts likewise have the mutual
spacing al.
[0046] FIG. 7 is a sketch illustrating a fourth embodiment of the
invention. According to said embodiment the electric connecting
device consisting of the insulating sleeve 5 and the electric leads
4.1 and 4.2 forms a structural unit together with the electronic
component housing 3. It can further be seen from FIG. 7 that inside
the insulating sleeve 5 the electric leads each have an offset K3
or, as the case may be, K4. The mutual spacing of the electric
leads 4.1 and 4.2 is increased from a2 to a1 by said offset. The
electric leads 4.1 and 4.2 exit the insulating sleeve 5 on the side
of the motor housing having said increased spacing a1 and can be
connected to a mating connector which is secured to the motor
housing and whose mating connector contacts likewise have the
mutual spacing a1.
* * * * *