US20120070324A1 - Pump Assembly - Google Patents
Pump Assembly Download PDFInfo
- Publication number
- US20120070324A1 US20120070324A1 US13/235,051 US201113235051A US2012070324A1 US 20120070324 A1 US20120070324 A1 US 20120070324A1 US 201113235051 A US201113235051 A US 201113235051A US 2012070324 A1 US2012070324 A1 US 2012070324A1
- Authority
- US
- United States
- Prior art keywords
- pump
- electric motor
- shaft
- bearing ring
- circuit board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
- B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
- B60T8/3675—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units
- B60T8/368—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units combined with other mechanical components, e.g. pump units, master cylinders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4031—Pump units characterised by their construction or mounting
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/085—Structural association with bearings radially supporting the rotary shaft at only one end of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
- H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
Definitions
- the disclosure relates to a pump assembly for a hydraulic vehicle brake system. It has a pump and an electric motor for driving it, which electric motor is connected to the pump to form the pump assembly.
- Such pump assemblies are used as what are referred to as feedback pumps in slip-controlled hydraulic vehicle brake systems and in electro-hydraulic vehicle brake systems which are power-brake systems in which a brake pressure for performing service braking is built up with the pump assembly.
- the utility model DE 20 2007 017 856 U1 discloses a miniature electric motor, with no purpose of use being specified.
- This electric motor has a disk-shaped rotor which is rotationally fixed to a motor shaft which is mounted with two bearings on each side of the rotor in a motor housing.
- a stator specifically in particular stator windings, are arranged on a printed circuit board which is fixedly arranged in the motor housing, parallel to the rotor and with a small axial air gap with respect thereto.
- the motor shaft passes through a hole in the printed circuit board.
- the windings of the stator are applied to the printed circuit board as conductor tracks using thick film technology. Motor electronics are accommodated on the printed circuit board.
- Laid-open patent application DE 10 2008 055 070 A1 discloses an eccentric gearing for driving a radial piston pump of a hydraulic assembly of a slip-controlled vehicle brake system.
- the eccentric gearing has a transmission shaft, a bearing ring which is mounted thereon with roller bearings, and roller bodies which are arranged in a gap between the transmission shaft and the bearing ring and which rotate around the transmission shaft when said shaft is driven in rotation, and roll on said shaft and in the bearing ring.
- the bearing ring is arranged eccentrically with respect to the transmission shaft, and the roller bodies have different diameters corresponding to a changing gap width between the bearing ring and the transmission shaft owing to the eccentricity of the bearing ring with respect to the transmission shaft.
- the eccentric gearing converts a rotating drive movement of the transmission shaft into a to and fro reciprocating movement of pump pistons which are arranged radially with respect to the transmission shaft and bear with an end side on the outside of the bearing ring.
- the eccentricity of the bearing ring runs around more slowly than would correspond to a rotational speed of the transmission shaft, and the eccentric gearing has a step-down ratio, meaning that a reciprocating frequency of the pump pistons is lower than a rotational speed of the transmission shaft.
- the pump assembly has a pump and an electric motor for driving it.
- the electric motor has a rotor, a stator and a printed circuit board.
- An electronic system can be arranged on the printed circuit board. This may be motor electronics for performing open-loop or closed-loop control, for example for performing electronic commutation of the electric motor.
- the printed circuit board can also have other electronics, for example for performing open-loop or closed-loop control of the hydraulic vehicle brake system for which the pump assembly is provided, that is to say, for example, slip control.
- the printed circuit board does not have to be exclusively a printed circuit board of the electric motor, and there is provision, but this is not compulsory, for motor electronics of the electric motor to be arranged on the printed circuit board.
- other electronics can also be additionally or exclusively arranged on the printed circuit board.
- the stator of the electric motor of the pump assembly according to the disclosure is mounted on the printed circuit board.
- coils of the stator are mounted on the printed circuit board.
- one or more sensors for sensing a rotation and/or a rotational position of the rotor of the electric motor in order to perform electronic commutation are also arranged on the printed circuit board.
- the disclosure has the advantage of reducing installation space and costs.
- a further advantage of the disclosure is a short connection of coils of the stator of the electric motor to motor electronics or other electronics which are arranged on the printed circuit board. The connection is possible without plug-in connectors or other connectors, which excludes a probability of failure because of corroded connectors or connectors which have become loose automatically.
- the disclosure will be explained in more detail below with reference to an exemplary embodiment which is illustrated in the drawing.
- the single drawing shows an axial section through a pump assembly according to the disclosure.
- the drawing is to be understood as a schematic and a simplified illustration for explaining and promoting understanding of the disclosure.
- the pump assembly 1 which is illustrated in the drawing is provided as what is referred to as a feedback pump of a hydraulic, slip-controlled vehicle brake system. It has an electric motor 2 and a pump 3 .
- the electric motor 2 is an electronically commutated brushless motor, but this is not absolutely necessary for the disclosure, for which other embodiments of electric motors can also be used.
- the electric motor 2 has a stator 4 with coils 5 which are arranged in an annular shape and are mounted on a printed circuit board 6 .
- the printed circuit board 6 is arranged radially with respect to a virtual motor axis.
- An electronic system 7 symbolized by electronic components is arranged on the printed circuit board 6 .
- the electronic system 7 comprises motor electronics for commutating the electric motor 2 , and electronics for performing slip control of the hydraulic vehicle brake system, the pump assembly 1 forming a component thereof. These electronics can also be conceived of as an electronic control device of the hydraulic vehicle brake system.
- the printed circuit board 6 is equipped on both sides.
- a sensor 26 for sensing a rotation and/or a rotational position of the rotor 4 for the electronic commutation of the electric motor 2 is also attached to a side of the printed circuit board 6 facing the electric motor 2 .
- the electric motor 2 is what is referred to as an external rotor with a pole pot 8 which encloses the stator 4 coaxially. Permanent magnets 9 are attached to an inner circumference of the pole pot 8 . An open end side of the pole pot 8 faces the printed circuit board 6 , and a closed side of the pole pot 8 faces the pump 3 . The pole pot 8 with the permanent magnet 9 forms a rotor 10 of the electric motor 2 .
- the embodiment of the electric motor 2 as an external rotor permits a compact and installation-space-saving design of the electric motor 2 and of the pump assembly 1 overall. However, the design of an external rotor is not absolutely essential for the disclosure, the electric motor 2 can also have a different embodiment.
- a shaft 11 is attached coaxially and protruding outward on an end side 12 of the pole pot 8 .
- the shaft 11 can be conceived of as a motor shaft, transmission shaft and/or pump shaft and is occasionally also referred to below as such.
- the shaft 11 is rotatably mounted with two ball bearings 13 in a hydraulic block 14 which at the same time also forms a pump housing 15 of the pump 3 .
- the electric motor 2 does not have its own bearing, its rotor 8 is exclusively mounted in a rotatable fashion with the two bearings 13 in the hydraulic block 14 or pump housing 15 .
- the pump assembly 1 or the pump 3 has, between the two bearings 13 , an eccentric gearing 16 which, apart from the shaft 11 , has roller bodies 17 and a bearing ring 18 .
- the shaft 11 can also be referred to as a transmission shaft.
- the bearing ring 18 encloses the shaft 11 in an axis-parallel and eccentric fashion, and a width of a gap between the bearing ring 18 and shaft 11 changes over the circumference.
- the roller bodies 17 have different diameters corresponding to the width of the gap between the bearing ring 18 and the shaft 11 at the location at which the respective roller body 17 is located. When the shaft 11 is driven in rotation, the roller bodies 17 roll on the shaft 11 and in the bearing ring 18 and run around the shaft 11 .
- the bearing ring 18 moves on a virtual orbit eccentrically with respect to the shaft 11 , wherein the bearing ring 18 does not rotate, or at any rate does not have to rotate.
- the movement of the bearing ring 18 on the orbit which is eccentric with respect to the shaft 11 is therefore also slower than would correspond to the rotational movement of the shaft 11 .
- the pump 3 is embodied as a piston pump and has two pump pistons 19 which are arranged opposite one another on the same axis, i.e. in what is referred to as a boxer arrangement.
- An axis of the piston pumps 19 intersects the axis and the rotational axis of the shaft 11 .
- the piston pumps 19 are held in an axially displaceable fashion in pump drill holes 20 in the hydraulic block 14 .
- Pump restoring springs 21 hold the pump pistons 19 in abutment on the outside of the bearing ring 18 .
- the restoring springs 21 are helical compression springs which are arranged on a side of the pump pistons 19 facing away from the eccentric gearing 16 , in the pump drill holes 21 .
- a step-down of the speed of the eccentric gearing 16 occurs, and a reciprocating frequency of the pump pistons 19 is lower than a rotational speed of the shaft 11 .
- a step-down ratio results from the difference between the diameters of the roller bodies 17 and the diameter of the shaft 11 , and high speed step-down ratios can be achieved.
- the eccentric gearing 16 converts a rotational movement of the shaft 11 into a translational movement, specifically the reciprocating movement of the pump pistons 19 .
- the possible large step-down of the speed of the eccentric gearing 16 permits a high-speed and therefore small electric motor 2 .
- the electric motor 2 has a low motor torque owing to its high rotational speed, and this permits its stator 4 to be mounted on the printed circuit board 6 .
- the printed circuit board 6 is mounted on the hydraulic block 14 at a distance therefrom by means of spacer sleeves 24 and screws 25 .
- Hydraulic blocks such as the hydraulic block 14 of the pump assembly 1 according to the disclosure are known for slip-controlled hydraulic vehicle brake systems. Apart from the pump 3 with the pump pistons 19 , further hydraulic components (not illustrated here) such as solenoid valves, hydraulic accumulators, dampers, non-return valves, pressure-limiting valves etc. are arranged and connected hydraulically to one another in such hydraulic blocks. The hydraulic components form hydraulic components of the slip-controlled device of the hydraulic vehicle brake system.
- Such hydraulic blocks are, as stated, known per se and will not be explained here in more detail.
Abstract
A pump assembly as a feedback pump of a hydraulic, slip-controlled vehicle brake system having a piston pump and an electric motor for driving it is disclosed. The electric motor is embodied as an external rotor and the stator is mounted on a printed circuit board which has an electronic system for commutating the electric motor and/or for performing slip control of the vehicle brake system.
Description
- This application claims priority under 35 U.S.C. §119 to German patent application no. DE 10 2010 040 889.1, filed Sep. 16, 2010 in Germany, the disclosure of which is incorporated herein by reference in its entirety.
- The disclosure relates to a pump assembly for a hydraulic vehicle brake system. It has a pump and an electric motor for driving it, which electric motor is connected to the pump to form the pump assembly.
- Such pump assemblies are used as what are referred to as feedback pumps in slip-controlled hydraulic vehicle brake systems and in electro-hydraulic vehicle brake systems which are power-brake systems in which a brake pressure for performing service braking is built up with the pump assembly.
- The utility model DE 20 2007 017 856 U1 discloses a miniature electric motor, with no purpose of use being specified. This electric motor has a disk-shaped rotor which is rotationally fixed to a motor shaft which is mounted with two bearings on each side of the rotor in a motor housing. A stator, specifically in particular stator windings, are arranged on a printed circuit board which is fixedly arranged in the motor housing, parallel to the rotor and with a small axial air gap with respect thereto. The motor shaft passes through a hole in the printed circuit board. The windings of the stator are applied to the printed circuit board as conductor tracks using thick film technology. Motor electronics are accommodated on the printed circuit board.
- Laid-open patent application DE 10 2008 055 070 A1 discloses an eccentric gearing for driving a radial piston pump of a hydraulic assembly of a slip-controlled vehicle brake system. The eccentric gearing has a transmission shaft, a bearing ring which is mounted thereon with roller bearings, and roller bodies which are arranged in a gap between the transmission shaft and the bearing ring and which rotate around the transmission shaft when said shaft is driven in rotation, and roll on said shaft and in the bearing ring. The bearing ring is arranged eccentrically with respect to the transmission shaft, and the roller bodies have different diameters corresponding to a changing gap width between the bearing ring and the transmission shaft owing to the eccentricity of the bearing ring with respect to the transmission shaft. When the transmission shaft is driven in rotation, the changing gap width with the roller bodies runs around the transmission shaft and the bearing ring moves on an orbit about a rotation axis of the transmission shaft. The eccentric gearing converts a rotating drive movement of the transmission shaft into a to and fro reciprocating movement of pump pistons which are arranged radially with respect to the transmission shaft and bear with an end side on the outside of the bearing ring. The eccentricity of the bearing ring runs around more slowly than would correspond to a rotational speed of the transmission shaft, and the eccentric gearing has a step-down ratio, meaning that a reciprocating frequency of the pump pistons is lower than a rotational speed of the transmission shaft.
- The pump assembly, according to the disclosure, has a pump and an electric motor for driving it. The electric motor has a rotor, a stator and a printed circuit board. An electronic system can be arranged on the printed circuit board. This may be motor electronics for performing open-loop or closed-loop control, for example for performing electronic commutation of the electric motor. The printed circuit board can also have other electronics, for example for performing open-loop or closed-loop control of the hydraulic vehicle brake system for which the pump assembly is provided, that is to say, for example, slip control. For this reason, the printed circuit board does not have to be exclusively a printed circuit board of the electric motor, and there is provision, but this is not compulsory, for motor electronics of the electric motor to be arranged on the printed circuit board. As stated, other electronics can also be additionally or exclusively arranged on the printed circuit board.
- The stator of the electric motor of the pump assembly according to the disclosure is mounted on the printed circuit board. In particular, coils of the stator are mounted on the printed circuit board. In particular, one or more sensors for sensing a rotation and/or a rotational position of the rotor of the electric motor in order to perform electronic commutation are also arranged on the printed circuit board.
- The disclosure has the advantage of reducing installation space and costs. A further advantage of the disclosure is a short connection of coils of the stator of the electric motor to motor electronics or other electronics which are arranged on the printed circuit board. The connection is possible without plug-in connectors or other connectors, which excludes a probability of failure because of corroded connectors or connectors which have become loose automatically.
- Advantageous refinements and developments of the disclosure are also set forth below.
- The disclosure will be explained in more detail below with reference to an exemplary embodiment which is illustrated in the drawing. The single drawing shows an axial section through a pump assembly according to the disclosure. The drawing is to be understood as a schematic and a simplified illustration for explaining and promoting understanding of the disclosure.
- The
pump assembly 1 which is illustrated in the drawing is provided as what is referred to as a feedback pump of a hydraulic, slip-controlled vehicle brake system. It has anelectric motor 2 and apump 3. Theelectric motor 2 is an electronically commutated brushless motor, but this is not absolutely necessary for the disclosure, for which other embodiments of electric motors can also be used. Theelectric motor 2 has a stator 4 with coils 5 which are arranged in an annular shape and are mounted on a printedcircuit board 6. The printedcircuit board 6 is arranged radially with respect to a virtual motor axis. An electronic system 7, symbolized by electronic components is arranged on the printedcircuit board 6. The electronic system 7 comprises motor electronics for commutating theelectric motor 2, and electronics for performing slip control of the hydraulic vehicle brake system, thepump assembly 1 forming a component thereof. These electronics can also be conceived of as an electronic control device of the hydraulic vehicle brake system. The printedcircuit board 6 is equipped on both sides. Asensor 26 for sensing a rotation and/or a rotational position of the rotor 4 for the electronic commutation of theelectric motor 2 is also attached to a side of the printedcircuit board 6 facing theelectric motor 2. - The
electric motor 2 is what is referred to as an external rotor with a pole pot 8 which encloses the stator 4 coaxially.Permanent magnets 9 are attached to an inner circumference of the pole pot 8. An open end side of the pole pot 8 faces the printedcircuit board 6, and a closed side of the pole pot 8 faces thepump 3. The pole pot 8 with thepermanent magnet 9 forms a rotor 10 of theelectric motor 2. The embodiment of theelectric motor 2 as an external rotor permits a compact and installation-space-saving design of theelectric motor 2 and of thepump assembly 1 overall. However, the design of an external rotor is not absolutely essential for the disclosure, theelectric motor 2 can also have a different embodiment. - A
shaft 11 is attached coaxially and protruding outward on anend side 12 of the pole pot 8. Theshaft 11 can be conceived of as a motor shaft, transmission shaft and/or pump shaft and is occasionally also referred to below as such. Theshaft 11 is rotatably mounted with twoball bearings 13 in a hydraulic block 14 which at the same time also forms a pump housing 15 of thepump 3. Theelectric motor 2 does not have its own bearing, its rotor 8 is exclusively mounted in a rotatable fashion with the twobearings 13 in the hydraulic block 14 or pump housing 15. - The
pump assembly 1 or thepump 3 has, between the twobearings 13, aneccentric gearing 16 which, apart from theshaft 11, hasroller bodies 17 and abearing ring 18. As a component of theeccentric gearing 16 theshaft 11 can also be referred to as a transmission shaft. Thebearing ring 18 encloses theshaft 11 in an axis-parallel and eccentric fashion, and a width of a gap between thebearing ring 18 andshaft 11 changes over the circumference. Theroller bodies 17 have different diameters corresponding to the width of the gap between thebearing ring 18 and theshaft 11 at the location at which therespective roller body 17 is located. When theshaft 11 is driven in rotation, theroller bodies 17 roll on theshaft 11 and in thebearing ring 18 and run around theshaft 11. The position of the widest gap between thebearing ring 18 and theshaft 11 rolls around theshaft 11 with theroller body 17 with the largest diameter, and the position of the narrowest gap between thebearing ring 18 andshaft 11 roll around theshaft 11 with theroller body 17 with the smallest diameter, and any gap width between thebearing ring 18 and theshaft 11 runs around theshaft 11 likewise. Thebearing ring 18 moves on a virtual orbit eccentrically with respect to theshaft 11, wherein thebearing ring 18 does not rotate, or at any rate does not have to rotate. Theroller body 17 and with it the gap width between the bearingring 18 and theshaft 11 run more slowly round theshaft 11 than would correspond to a rotational speed of theshaft 11. The movement of thebearing ring 18 on the orbit which is eccentric with respect to theshaft 11 is therefore also slower than would correspond to the rotational movement of theshaft 11. - The
pump 3 is embodied as a piston pump and has twopump pistons 19 which are arranged opposite one another on the same axis, i.e. in what is referred to as a boxer arrangement. An axis of the piston pumps 19 intersects the axis and the rotational axis of theshaft 11. The piston pumps 19 are held in an axially displaceable fashion in pump drill holes 20 in the hydraulic block 14. Pump restoringsprings 21 hold thepump pistons 19 in abutment on the outside of thebearing ring 18. In the illustrated exemplary embodiment, the restoring springs 21 are helical compression springs which are arranged on a side of thepump pistons 19 facing away from theeccentric gearing 16, in the pump drill holes 21. The movement of thebearing ring 18 on an orbit which is eccentric with respect to theshaft 11 when theshaft 11 is driven in rotation brings about a reciprocating movement of thepump pistons 19, as a result of which thepump pistons 19 take in brake fluid in a manner known per se throughinlet valves 22 and expel it thoughoutlet valves 23. This taking in and expulsion, i.e. the delivery of brake fluid with piston pumps is known per se and does not need to be explained in more detail here. - As a result of the relatively low speed of the movement of the
bearing ring 18 on the orbit which is eccentric with respect to theshaft 11, compared to a rotational speed of theshaft 11, a step-down of the speed of theeccentric gearing 16 occurs, and a reciprocating frequency of thepump pistons 19 is lower than a rotational speed of theshaft 11. A step-down ratio results from the difference between the diameters of theroller bodies 17 and the diameter of theshaft 11, and high speed step-down ratios can be achieved. Theeccentric gearing 16 converts a rotational movement of theshaft 11 into a translational movement, specifically the reciprocating movement of thepump pistons 19. The possible large step-down of the speed of theeccentric gearing 16 permits a high-speed and therefore smallelectric motor 2. For a given motor power, theelectric motor 2 has a low motor torque owing to its high rotational speed, and this permits its stator 4 to be mounted on the printedcircuit board 6. - The printed
circuit board 6 is mounted on the hydraulic block 14 at a distance therefrom by means ofspacer sleeves 24 and screws 25. - Hydraulic blocks such as the hydraulic block 14 of the
pump assembly 1 according to the disclosure are known for slip-controlled hydraulic vehicle brake systems. Apart from thepump 3 with thepump pistons 19, further hydraulic components (not illustrated here) such as solenoid valves, hydraulic accumulators, dampers, non-return valves, pressure-limiting valves etc. are arranged and connected hydraulically to one another in such hydraulic blocks. The hydraulic components form hydraulic components of the slip-controlled device of the hydraulic vehicle brake system. Such hydraulic blocks are, as stated, known per se and will not be explained here in more detail.
Claims (7)
1. A pump assembly for a hydraulic vehicle brake system, comprising:
a pump; and
an electric motor configured to drive the pump,
wherein the electric motor has a rotor, a stator, and a printed circuit board, and
wherein the stator is mounted on the printed circuit board.
2. The pump assembly according to claim 1 , wherein the stator has coils which are mounted on the printed circuit board.
3. The pump assembly according to claim 1 , wherein the electric motor is an external rotor.
4. The pump assembly according to claim 3 , wherein the rotor is coaxial and rigid with a shaft of the pump.
5. The pump assembly according to claim 1 , wherein the rotor of the electric motor is rotatably mounted in the pump.
6. The pump assembly according to claim 1 , wherein:
the pump has eccentric gearing with a transmission shaft, a bearing ring which is mounted on rolling bearings on the transmission shaft and roller bodies which are arranged in a gap between the transmission shaft and the bearing ring, and
the bearing ring is arranged eccentrically with respect to the transmission shaft, and the roller bodies have different diameters corresponding to a different gap width between the transmission shaft and the bearing ring.
7. The pump assembly according to claim 1 , wherein the pump is a piston pump.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102010040889.1 | 2010-09-16 | ||
DE102010040889A DE102010040889A1 (en) | 2010-09-16 | 2010-09-16 | pump unit |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120070324A1 true US20120070324A1 (en) | 2012-03-22 |
Family
ID=45768728
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/235,051 Abandoned US20120070324A1 (en) | 2010-09-16 | 2011-09-16 | Pump Assembly |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120070324A1 (en) |
JP (1) | JP2012062888A (en) |
CN (1) | CN102420496A (en) |
DE (1) | DE102010040889A1 (en) |
FR (1) | FR2965126A1 (en) |
Cited By (6)
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---|---|---|---|---|
US20150054379A1 (en) * | 2012-04-03 | 2015-02-26 | Mahle International Gmbh | Electric motor |
US20160001624A1 (en) * | 2013-03-04 | 2016-01-07 | Wabco Gmbh | Compressor Arrangement for Operating a Compressed Air Supply Facility, Compressed Air Supply Facility and Compressed Air Supply System, and Vehicle with Such a Compressed Air Supply Facility |
US20180065612A1 (en) * | 2016-09-07 | 2018-03-08 | Robert Bosch Gmbh | Hydraulic Unit for a Slip Controller of a Hydraulic Vehicle Brake System |
US11421669B2 (en) * | 2020-01-09 | 2022-08-23 | Lg Electronics Inc. | Motor assembly and reciprocation compressor including motor assembly |
US11485338B2 (en) * | 2016-01-22 | 2022-11-01 | Advics Co., Ltd. | Electric braking device for vehicle |
US11535216B2 (en) * | 2017-05-12 | 2022-12-27 | Magna International Inc. | Brake by wire |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013223091A1 (en) | 2013-11-13 | 2015-05-13 | Robert Bosch Gmbh | electric motor |
DE102017208672A1 (en) * | 2017-05-23 | 2018-11-29 | Robert Bosch Gmbh | Hydraulic unit of a slip control of a vehicle brake system with an engine block |
CN113246009B (en) * | 2021-05-30 | 2022-05-24 | 江苏长禾胶囊有限公司 | Hollow capsule polishing equipment using ozone for sterilization |
CN114645847B (en) | 2022-05-19 | 2022-08-05 | 浙大城市学院 | Two-dimensional motor piston pump |
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- 2011-09-14 JP JP2011200156A patent/JP2012062888A/en not_active Withdrawn
- 2011-09-14 CN CN2011102762275A patent/CN102420496A/en active Pending
- 2011-09-16 US US13/235,051 patent/US20120070324A1/en not_active Abandoned
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
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US20150054379A1 (en) * | 2012-04-03 | 2015-02-26 | Mahle International Gmbh | Electric motor |
US9859760B2 (en) * | 2012-04-03 | 2018-01-02 | Mahle International Gmbh | Electric motor having an asymmetric stator |
US20160001624A1 (en) * | 2013-03-04 | 2016-01-07 | Wabco Gmbh | Compressor Arrangement for Operating a Compressed Air Supply Facility, Compressed Air Supply Facility and Compressed Air Supply System, and Vehicle with Such a Compressed Air Supply Facility |
US10767639B2 (en) * | 2013-03-04 | 2020-09-08 | Wabco Gmbh | Compressor arrangement for compressed air supply facility |
US11485338B2 (en) * | 2016-01-22 | 2022-11-01 | Advics Co., Ltd. | Electric braking device for vehicle |
US20180065612A1 (en) * | 2016-09-07 | 2018-03-08 | Robert Bosch Gmbh | Hydraulic Unit for a Slip Controller of a Hydraulic Vehicle Brake System |
US10479338B2 (en) * | 2016-09-07 | 2019-11-19 | Robert Bosch Gmbh | Hydraulic unit for a slip controller of a hydraulic vehicle brake system |
US11535216B2 (en) * | 2017-05-12 | 2022-12-27 | Magna International Inc. | Brake by wire |
US11421669B2 (en) * | 2020-01-09 | 2022-08-23 | Lg Electronics Inc. | Motor assembly and reciprocation compressor including motor assembly |
Also Published As
Publication number | Publication date |
---|---|
DE102010040889A1 (en) | 2012-03-22 |
FR2965126A1 (en) | 2012-03-23 |
JP2012062888A (en) | 2012-03-29 |
CN102420496A (en) | 2012-04-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ROBERT BOSCH GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HAECKER, JUERGEN;ALAZE, NORBERT;REEL/FRAME:027529/0234 Effective date: 20111118 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |