CN216530920U

CN216530920U - Electric control brake building module

Info

Publication number: CN216530920U
Application number: CN202123185789.7U
Authority: CN
Inventors: 唐琳; 胡明路; 谢亮; 袁永彬
Original assignee: Wuhu Bethel Automotive Safety Systems Co Ltd
Current assignee: Wuhu Bethel Automotive Safety Systems Co Ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-05-13
Anticipated expiration: 2031-12-17

Abstract

The utility model discloses an electronic control brake pressure building module which comprises a motor assembly, a piston and a transmission component connected with the motor assembly and the piston, wherein the motor assembly comprises a motor rotor and a rotor shaft connected with the motor rotor, the rotor shaft is a hollow shaft, and the piston and the transmission component are positioned in an inner cavity of the rotor shaft. According to the electronic control brake pressure building module, the hollow shaft motor is adopted, the transmission assembly is integrated in the hollow rotor shaft, and the motor rotor directly drives the transmission assembly to build pressure, so that the number of parts is reduced, the structural compactness is improved, the axial length is reduced, the overall arrangement space is saved, and the reliability of a pressure building system is improved.

Description

Electric control brake building module

Technical Field

The utility model belongs to the technical field of automobile brake systems, and particularly relates to an electronic control brake voltage building module.

Background

With the development of automobile electronic technology, intelligent driving technology has been developed rapidly, and under this background, the electrification process of automobiles is accelerated, and electromechanical integration technology and products are applied in large scale on the whole automobiles, wherein electronic control brake products are typical examples. Such products that have appeared in the market today can be roughly divided into two broad categories: the method includes that a traditional vacuum booster is replaced by an electric control driven booster; secondly, products (such as ABS, ESC and the like) of other electric control systems are integrated on the basis of electric control driving voltage build-up. Wherein the integrated product has the advantages of lighter weight, more compact volume and the like.

The defects of the existing integrated product scheme are mainly that the number of parts is large, the structure is complex, the axial length is large, and the arrangement of a vehicle body is not facilitated. Meanwhile, the rotating speed of a motor in the voltage building module is too high, and the noise of the system is not easy to control.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving one of the technical problems of the prior art. Therefore, the utility model provides an electronic control brake building module, aiming at improving the structure compactness and reducing the occupied space.

In order to achieve the purpose, the utility model adopts the technical scheme that: the electric control brake pressure building module comprises a motor assembly, a piston and a transmission component connected with the motor assembly and the piston, wherein the motor assembly comprises a motor rotor and a rotor shaft connected with the motor rotor, the rotor shaft is a hollow shaft, and the piston and the transmission component are located in an inner cavity of the rotor shaft.

The transmission assembly is connected with the first connecting piece, the rotor shaft is connected with the second connecting piece, the first connecting piece is connected with the second connecting piece, and the first connecting piece and the second connecting piece rotate synchronously.

The first connecting piece and the second connecting piece are connected through splines, the first connecting piece is provided with an external spline, and the second connecting piece is provided with an internal spline.

The first connecting piece and the second connecting piece are in spherical surface contact in the axial direction and are provided with self-aligning structures.

The transmission assembly comprises a power input part and a power output part, the power input part is connected with the first connecting piece, the power output part is connected with the piston, and a damping element used for applying axial pretightening force to the first connecting piece and the second connecting piece is arranged on the power input part.

The piston pass through the third connecting piece with the transmission assembly is connected, set up in the interior cavity of rotor shaft and be used for carrying out the mechanism that splines that leads to the piston, spline the mechanism and cooperate with the third connecting piece.

The rotation stopping mechanism comprises a guide sleeve, the guide sleeve is of a hollow structure, a guide groove for embedding the third connecting piece is formed in the inner wall surface of the guide sleeve, and the piston is located in the inner cavity of the guide sleeve.

The rotation stopping mechanism further comprises a fixing plate connected with the guide sleeve.

The motor assembly further comprises a motor shell and an end cover component connected with the motor shell, the rotor shaft is installed on the end cover component through a first bearing, and the second connecting piece is installed in the motor shell through a second bearing.

The rotor shaft is provided with a sensor magnetic ring, the end cover assembly is provided with a sensor assembly matched with the sensor magnetic ring, and the sensor assembly is arranged on the side face of the sensor magnetic ring and forms a certain included angle with the sensor magnetic ring.

According to the electric control brake pressure building module, the hollow shaft motor is adopted, the transmission assembly is integrated in the hollow rotor shaft, and the motor rotor directly drives the transmission assembly to build pressure, so that the number of parts of a transmission system is reduced, the structural compactness is improved, the axial length and the occupied space are reduced, and the reliability of a pressure building system is improved.

Drawings

The description includes the following figures, the contents shown are respectively:

FIG. 1 is a cross-sectional view of an electronically controlled brake pressure building block of the present invention;

FIG. 2 is an exploded view of the electronically controlled brake pressure build module of the present invention;

FIG. 3 is a schematic structural view of the rotation stop mechanism;

FIG. 4 is a schematic view of an internal and external spline engagement;

FIG. 5 is a schematic view of the connection of the piston to the transmission assembly;

FIG. 6 is a cross-sectional view of the structure shown in FIG. 5;

FIG. 7 is a schematic view of sensor assembly and attachment;

labeled as: 1. a valve body; 2. a cylinder barrel; 3. a rotation stopping mechanism; 301. a fixing plate; 302. a guide sleeve; 4. a sensor assembly; 5. a piston; 6. a power supply busbar; 7. a motor housing; 8. a transmission assembly; 9. a first connecting member; 10. a damping element; 11. a second connecting member; 12. a gasket; 13. a first bearing; 14. a motor rotor; 15. a motor stator; 16. an end cap assembly; 17. a second bearing; 18. a sensor magnetic ring; 19. a rotor shaft; 20. a third connecting member; 21. a power take-off component; 22. a power input component.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation.

As shown in fig. 1 to 7, the utility model provides an electrically controlled brake pressure building module, which comprises a cylinder 2, a motor assembly, a piston 5 movably arranged in the cylinder 2 along an axial direction, and a transmission component 8 connected with the motor assembly and the piston 5. The motor assembly comprises a motor shell 7, a motor stator 15, a motor rotor 14, a rotor shaft 19 connected with the motor rotor 14 and an end cover component 16 connected with the motor shell 7, wherein the rotor shaft 19 is a hollow shaft, and the piston 5 and the transmission component 8 are positioned in the inner cavity of the rotor shaft 19.

Specifically, as shown in fig. 1 and 2, the motor stator 15 is fixedly disposed in the inner cavity of the motor housing 7, the motor rotor 14 is sleeved on the rotor shaft 19, the iron core of the motor rotor 14 is rigidly connected to the rotor shaft 19, the rotor shaft 19 is a hollow circular tube with two open ends, the rotor shaft 19 and the piston 5 are coaxially disposed, and the outer diameter of the piston 5 is smaller than the inner diameter of the rotor shaft 19. The transmission assembly 8 is used for converting the rotary motion of the motor rotor 14 into the linear motion of the piston 5, so that the piston 5 reciprocates in the cylinder 2 along the axial direction, and pressure build-up and pressure reduction in the cylinder 2 are realized. The cylinder barrel 2 is provided with hydraulic oil, the cylinder barrel 2 is arranged on a valve body 1 of an automobile braking system, and a motor shell 7 is positioned on one side of the valve body 1 and fixedly connected with the valve body 1. Through adopting the hollow shaft motor design scheme, integrate the transmission assembly 8 of integral type in hollow rotor shaft 19, motor rotor 14 direct drive transmission assembly 8 builds the pressure, can realize the low noise, and high dependability pressure boost, decompression action have reduced the part quantity of system, and effectual reliability and the stability that improves the lift system also are favorable to the control of cost simultaneously.

As shown in fig. 1, 2, 4 to 6, the transmission assembly 8 is connected to the first connecting member 9, the rotor shaft 19 is connected to the second connecting member 11, and the first connecting member 9 and the second connecting member 11 are connected to rotate synchronously. The first connecting piece 9 and the second connecting piece 11 are in spline connection. In assembly, the second connecting member 11 is press-fitted to one end of the rotor shaft 19, and the second connecting member 11 is welded to the rotor shaft 19. A self-aligning structure is arranged between the first connecting piece 9 and the second connecting piece 11, so that self-aligning can be achieved in the pressure and pressure reducing process, the requirements on part machining precision and assembling precision are lowered, self-aligning can be achieved, eccentricity introduced in assembling is eliminated, the influence on durability of a system is reduced, and the noise of the system is lowered.

As shown in fig. 1, 2, 4 to 6, the second connecting member 11 is fixedly connected to one end of the rotor shaft 19 and is coaxial with the rotor shaft 19, the rotor shaft 19 is mounted on the end cap assembly 16 through the first bearing 13, the second connecting member 11 is mounted in the motor housing 7 through the second bearing 17, the first bearing 13 is a deep groove ball bearing and the second bearing 17 is a four-point contact bearing, and the motor rotor 14 is located between the first bearing 13 and the second bearing 17. The force of the hydraulic pressure acting against the piston 5 is transmitted in turn to the transmission assembly 8, the first coupling member 9 and the second coupling member 11, then to the second bearing 17 and finally to the motor housing 7. The molding module part adopts a radial superposition design, shortens the length of a product, reduces the occupied space, has a compact structure, a small number of parts and light weight, and is more beneficial to the space arrangement of a vehicle body, the manufacture of parts and the cost control. Meanwhile, the scheme adopts a direct-drive structure, a gear mechanism is omitted, the number of parts of a transmission system is reduced, the reliability of a pressure building system is improved, the noise of the system is reduced, and the problems in the background art are solved.

As shown in fig. 1, 2, 4 to 6, in the present embodiment, the transmission assembly 8 is a screw-nut mechanism, the transmission assembly 8 includes a power input member 22 and a power output member 21, a screw transmission is formed between the power input member 22 and the power output member 21, the power input member 22 is fixedly connected to the first connecting member 9 and is coaxial with the first connecting member, the power output member 21 is connected to the piston 5 and is coaxial with the piston 5, the piston 5 is hollow, and the power input member 22 is inserted into an inner cavity of the piston 5 and is coaxial with the piston. The power input part 22 is provided with a damping element 10 for applying an axial pretension to the first connecting part 9 and the second connecting part 11. The damping element 10 is a damping pad made of an elastomer material, and the transmission assembly 8 and the motor rotor 14 are firmly extruded together through the damping pad, so that a gap in working is eliminated, and abnormal sound caused by collision in high-speed starting is prevented.

As shown in fig. 1, 2, 4 to 6, the spacer 12 is provided on the power input member 22, the spacer 12 is riveted to the power input member 22, and the damper element 10 is sandwiched between the first connecting member 9 and the spacer 12.

As shown in fig. 1, 2, 3, 5 and 6, the piston 5 is connected to the transmission assembly 8 through a third connecting member 20, the rotation stopping mechanism 3 for guiding the piston 5 is disposed in the inner cavity of the rotor shaft 19, and the rotation stopping mechanism 3 is engaged with the third connecting member 20. One end of the power output part 21 is pressed into the inner cavity of the piston 5, the third connecting piece 20 is an injection molding piece, the third connecting piece 20 is positioned between the end of the piston 5 and the power output part 21, and the third connecting piece 20 is fixedly connected with the piston 5 and the power output part 21. The rotation stopping mechanism 3 comprises a guide sleeve 302, the guide sleeve 302 is of a structure with two open ends and hollow inside, the piston 5 passes through the guide sleeve 302 and is coaxially arranged with the guide sleeve 302, one end of the guide sleeve 302 is inserted into the inner cavity of the rotor shaft 19, the other end of the guide sleeve 302 is inserted into the inner cavity of the cylinder barrel 2, a guide groove for embedding the protrusion on the third connecting piece 20 is arranged on the inner wall surface of the guide sleeve 302, and the piston 5 is located in the inner cavity of the guide sleeve 302. The protrusions of the third connecting member 20 are fitted into the guide grooves to prevent rotation, so that the piston 5 can move only in a straight line in the axial direction. The shape of the protrusion on the third connecting piece 20 is matched with the shape of the guide groove, the guide groove extends along the length direction of the guide sleeve 302, the guide groove is provided with a plurality of guide grooves, all the guide grooves are uniformly distributed on the inner wall surface of the guide sleeve 302 along the circumferential direction, the number of the protrusions on the third connecting piece 20 is the same as that of the guide grooves, and the reliability is higher. Adopt the secondary injection structure anticreep, prevent changeing, direction after being in the same place piston 5 and drive mechanism crimping, simplify complicated fixed and guide structure, increased the reliability of spare part simultaneously, increase life-span.

In the present embodiment, as shown in FIG. 3, the number of the guide grooves in the guide sleeve 302 is set to 1 or more.

As shown in fig. 1 to 3, the rotation stopping mechanism 3 further includes a fixing plate 301 connected to the guide sleeve 302, the fixing plate 301 is sleeved on the guide sleeve 302, the fixing plate 301 is fixedly connected to the guide sleeve 302, and the fixing plate 301 is mounted on the valve body 1.

Preferably, the motor rotor 14 is of a surface-mounted structure, the magnetic steel is embedded into the plastic framework and is wrapped and riveted by the steel sleeve, and the manufacturability of the product is improved.

As shown in fig. 1, 2 and 7, a sensor magnetic ring 18 is disposed on a rotor shaft 19, an end cover component 16 is fixedly connected to one end of a motor housing 7, a sensor assembly 4 matched with the sensor magnetic ring 18 is disposed on the end cover component 16, the sensor assembly 4 is used for detecting the position of a motor rotor 14, the sensor assembly 4 is located inside the motor housing 7, and the sensor magnetic ring 18 is disposed on a side surface of the sensor magnetic ring 18 and forms a certain included angle with the sensor magnetic ring 18. One end of the rotor shaft 19 is fixedly connected with the first connecting piece 9, and the other end of the rotor shaft 19 is fixedly connected with the sensor magnetic ring 18. The sensor assembly 4 and the rotor shaft 19 are arranged in a radial mode, the space utilization rate is improved, and the length of a module product is shortened.

Preferably, as shown in fig. 1, the sensor magnetic ring 18 is located between the end cover assembly 16 and the valve body 1, the sensor magnetic ring 18 is disposed outside the end cover assembly 16, and the end cover assembly 16 is made of metal, so that electromagnetic interference is prevented by the metal isolation effect. The sensor assembly 4 and the end cover assembly 16 are connected together by adopting a riveting process, so that the number of parts is reduced, and the reliability is improved.

As shown in figure 1, when the motor shell 7 and the valve body 1 are assembled, one surface of each pin is positioned, and the pins are integrated on the motor shell 7 in a stamping and stretching mode, so that the number of parts is reduced, the part cost is saved, the accumulated assembly error is avoided, and the assembly precision of the system is improved.

The utility model is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the utility model are not limited in this respect. Various insubstantial improvements are made by adopting the method conception and the technical scheme of the utility model; the present invention is not limited to the above embodiments, and can be modified in various ways.

Claims

1. Automatically controlled braking pressure building block, including motor assembly, piston and with the drive assembly of motor assembly and piston connection, the motor assembly includes electric motor rotor and the rotor shaft of being connected with electric motor rotor, its characterized in that: the rotor shaft is a hollow shaft, and the piston and the transmission assembly are located in an inner cavity of the rotor shaft.

2. The electronically controlled brake pressure building module of claim 1, wherein: the transmission assembly is connected with the first connecting piece, the rotor shaft is connected with the second connecting piece, the first connecting piece is connected with the second connecting piece, and the first connecting piece and the second connecting piece rotate synchronously.

3. The electronically controlled brake pressure building module of claim 2, wherein: the first connecting piece is elastically connected with the second connecting piece.

4. The electronically controlled brake pressure building module of claim 3, wherein: the first connecting piece and the second connecting piece are provided with self-aligning structures.

5. The electronically controlled brake pressure building module of any one of claims 2 to 4, wherein: the transmission assembly comprises a power input part and a power output part, the power input part is connected with the first connecting piece, the power output part is connected with the piston, and a damping element used for applying axial pretightening force to the first connecting piece and the second connecting piece is arranged on the power input part.

6. The electronically controlled brake pressure building module of any one of claims 1 to 4, wherein: the piston pass through the third connecting piece with the transmission assembly is connected, set up in the interior cavity of rotor shaft and be used for carrying out the mechanism that splines that leads to the piston, spline the mechanism and cooperate with the third connecting piece.

7. The electronically controlled brake pressure building module of claim 6, wherein: the rotation stopping mechanism comprises a guide sleeve, the guide sleeve is of a hollow structure, a guide groove for embedding the third connecting piece is formed in the inner wall surface of the guide sleeve, and the piston is located in the inner cavity of the guide sleeve.

8. The electronically controlled brake pressure building module of claim 7, wherein: the rotation stopping mechanism further comprises a fixing plate connected with the guide sleeve.

9. The electronically controlled brake pressure building module of any one of claims 2 to 4, wherein: the motor assembly further comprises a motor shell and an end cover component connected with the motor shell, the rotor shaft is installed on the end cover component through a first bearing, and the second connecting piece is installed in the motor shell through a second bearing.

10. The electronically controlled brake pressure building module of claim 9, wherein: the rotor shaft is provided with a sensor magnetic ring, the end cover assembly is provided with a sensor assembly matched with the sensor magnetic ring, and the sensor assembly is arranged on the side face of the sensor magnetic ring and forms a certain included angle with the sensor magnetic ring.