CN218235919U

CN218235919U - Pressure supply unit of automobile brake system

Info

Publication number: CN218235919U
Application number: CN202223005793.5U
Authority: CN
Inventors: 刘海超; 魏凌涛; 刘子俊
Original assignee: Beijing Yingchuang Huizhi Automobile Technology Co ltd
Current assignee: Beijing Yingchuang Huizhi Automobile Technology Co ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-01-06
Anticipated expiration: 2032-11-11

Abstract

The utility model discloses an automobile brake system supplies pressure unit, including the hollow shaft motor, hollow shaft motor one side is connected and is provided with the end cover, hollow shaft motor internal connection is provided with electric motor rotor, electric motor rotor internal side connection is provided with piston assembly, piston assembly one end is connected and is provided with the uide bushing, the uide bushing one side is connected and is provided with the hydraulic pressure master cylinder, the uide bushing with it is provided with the angle sensor subassembly to connect between the hollow shaft motor. The utility model discloses effectively guaranteed reliability, the stability of work, played effectual optimization and promotion to the degree of integrating, reduced whole volume, improved the life of product, the wholeness is strong, motor job stabilization, system rigidity is high.

Description

Pressure supply unit of automobile brake system

Technical Field

The utility model relates to an automotive industry technical field specifically is a car braking system supplies pressure unit.

Background

The pressure supply unit of the current automobile brake system is that a motor pushes a piston through a speed reducing mechanism and a motion conversion mechanism, pressure is built in a hydraulic cylinder, the scheme is that the motor and the hydraulic cylinder are designed independently, so that the size of the whole product is large, the integration degree is low, disadvantages exist on the product cost and the production process complexity, and the stable operation effect of the whole product is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an automobile brake system supplies pressure unit to solve the problem that provides among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the hollow shaft motor is characterized by comprising a hollow shaft motor, an end cover is connected and arranged on one side of the hollow shaft motor, a motor rotor is arranged in the hollow shaft motor in an internal connection mode, a piston assembly is arranged in the motor rotor in an internal side connection mode, one end of the piston assembly is connected and provided with a guide sleeve, a hydraulic main cylinder is connected and arranged on one side of the guide sleeve, and an angle sensor assembly is connected and arranged between the guide sleeve and the hollow shaft motor.

Preferably, a fixing bolt is connected and arranged on one side of the end cover, one end of the fixing bolt penetrates through the end cover and is connected and arranged with the hollow shaft motor, a first sealing ring is connected and arranged between the hollow shaft motor and the fixing bolt, and an external connecting bolt is connected and arranged on one side of the hollow shaft motor

Preferably, electric motor rotor includes the casing, the casing both sides are connected and are provided with the response rotor, casing one side is equipped with the hole, hole one side is equipped with the second and cuts the plane, the second is cut plane one side and is connected and be provided with first boss, the casing with piston assembly connects the setting.

Preferably, the piston assembly comprises a screw rod, one end of the screw rod is connected with a movable nut, and one side of the movable nut is connected with a piston.

Preferably, a cylindrical surface is connected to one side of the screw rod, a chamfer is arranged at one end of the cylindrical surface, and a first tangent plane is arranged at one end of the cylindrical surface.

Preferably, a hexagonal hole is formed in one end of the piston, and a connecting groove is formed in one end, far away from the hexagonal hole, of the piston.

Preferably, the movable nut is provided with a connecting end in a connecting manner, grooves are formed in two sides of the movable nut, and a third boss is connected to one side of the inner wall of the movable nut.

Preferably, one end of the screw rod extends into the shell, one end of the cylindrical surface penetrates through the inner hole and is provided with a connecting bolt in a connecting mode, one end of the connecting bolt is provided with a clamping ring in a connecting mode, the surface of the clamping ring is provided with a bearing in a connecting mode, the outer ring of the bearing is fixedly arranged on one side of the inner wall of the hollow shaft motor, and one side of a first tangent plane is embedded with the second tangent plane.

Preferably, a second boss is connected and arranged on one side of the inner wall of the guide sleeve, limiting blocks are connected and arranged on two sides of one end of the guide sleeve, a long round hole and a short round hole are formed in one side of the guide sleeve, the second boss is connected with the groove in a sliding mode, a power supply contact pin is connected and arranged on one side of the hollow shaft motor, a signal pin is connected and arranged on one side of the angle sensor assembly, and the signal pin and the power supply contact pin respectively penetrate through the corresponding long round hole and the corresponding short round hole.

Preferably, the outer ring of the hydraulic main cylinder is connected with an outer end sealing ring, the inner ring of the hydraulic main cylinder is connected with an inner end sealing ring and a guide ring, and one end of the piston extends into the hydraulic main cylinder.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a piston links firmly with the nut, lead screw and rotor interference fit to supply with lockbolt and the tangent plane cooperation of preventing starting dislocation, the reliability, the stability of work have been guaranteed to many redundant designs, have designed the uide bushing that prevents the nut rotation, the uide bushing has not only restricted the rotation of nut, can play the guide effect simultaneously, has improved the stationarity of nut and piston motion, has played effectual optimization and promotion to the degree of integration, reduces whole volume;

2. the utility model discloses still all increase spacing design in the extreme position department of distal end and near-end through piston and screw nut combination simultaneously, improve stability and reliability, reduce the operating noise of product, reduced the rigidity collision between the part in addition, improved the life of product to a certain extent, the wholeness is strong, motor job stabilization, system rigidity height, the appearance is pleasing to the eye.

Drawings

Fig. 1 is a schematic view of the overall structure of the pressure supply unit of the automobile brake system of the present invention;

fig. 2 is an explosion structure diagram of a pressure supply unit of an automobile braking system according to the present invention;

fig. 3 is a schematic structural view of a screw rod in the pressure supply unit of the automobile brake system of the present invention;

fig. 4 is a schematic structural view of a piston in the pressure supply unit of the automobile brake system of the present invention;

fig. 5 is a schematic structural view of a nut in the pressure supply unit of the automobile brake system of the present invention;

fig. 6 is a schematic structural view of a guide sleeve in a pressure supply unit of an automobile brake system according to the present invention;

fig. 7 is the utility model discloses a motor rotor's in car braking system supplies pressure unit structural schematic.

In the figure: 1. an end cap; 2. a first seal ring; 3. a bearing; 4. a connecting bolt; 5. fixing the bolt; 7. a hollow shaft motor; 8. a motor rotor; 9. a piston assembly; 10. moving the nut; 11. a screw rod; 16. an angle sensor assembly; 17. a guide sleeve; 18. a hydraulic master cylinder; 21. an outer end sealing ring; 22. a power supply pin; 23. an inner end sealing ring; 24. a piston; 27. a guide ring; 30. a snap ring; 31. a signal pin; 41. a hexagonal hole; 42. connecting grooves; 51. a cylindrical surface; 52. chamfering; 53. a first tangent plane; 61. an induction moving plate; 62. a second tangent plane; 63. a first boss; 64. an inner bore; 65. a housing; 71. a second boss; 72. a limiting block; 73. a long round hole; 74. a short circular hole; 81. a trench; 82. a connecting end; 83. a third boss; 111. and an external connecting bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: the hollow shaft motor comprises a hollow shaft motor 7, wherein an end cover 1 is connected to one side of the hollow shaft motor 7, a motor rotor 8 is connected to the inside of the hollow shaft motor 7, a piston assembly 9 is connected to the inner side of the motor rotor 8, a guide sleeve 17 is connected to one end of the piston assembly 9, a hydraulic main cylinder 18 is connected to one side of the guide sleeve 17, and an angle sensor assembly 16 is connected between the guide sleeve 17 and the hollow shaft motor 7.

The piston assembly consists of a lead screw 11, a nut 10 and a piston 24.

The lead screw 11 of the piston assembly is pressed on the motor rotor 8, so that interference assembly between the cylindrical surface 51 of the lead screw 11 and the inner hole 64 inside the motor rotor 8 is realized, during press mounting, the first tangent plane 53 on one side of the lead screw 11 is completely opposite to the tangent plane 62 of the inner hole 64 on one side of the motor rotor 8, and the cylindrical end 51 of the lead screw 11 of the piston assembly is provided with a chamfer 52 for self-centering in the press mounting process and keeping the initial stability of press mounting.

The motor rotor 8 is in interference fit with the inner ring of the bearing 3 through press fitting, and the outer ring of the bearing 3 is fixed on one side of the shell of the hollow shaft motor 7 through press fitting.

The lead screw 11 is redundantly connected with the motor rotor 8 and the bearing 3 through the connecting bolt 4 and the clamping ring 30, and connection looseness of all parts is prevented when interference fit fails.

The motor rotor 8 is provided with a first boss 63, and the action of the first boss is that, when the piston assembly 9 returns, a third boss 83 on the nut 10 collides with the first boss 63 on the motor rotor 8, so that tangential limitation is realized, and the occurrence of the dead locking condition after end face collision is avoided.

The spindle nut 10 is screwed to the piston 24 for synchronous movement.

An end cover 1 is arranged at the tail end of the hollow shaft motor 7 and is fastened on a shell of the hollow shaft motor 7 through a fixing bolt 5, and meanwhile, a sealing ring 2 is arranged between the end cover 1 and the shell of the hollow shaft motor 7 and used for sealing, dust prevention, protection and the like.

The motor rotor 8 is provided with a petal-shaped induction moving piece 61, and when the motor rotor 8 rotates, the induction moving piece is used for triggering the angle sensor assembly 16 to generate a signal.

The end face of the hollow shaft motor 7 is provided with a guide sleeve 17, so that the interior of the motor is sealed, the nut 10 is prevented from rotating and guided, and meanwhile, the hydraulic main cylinder 18 is limited to form an integral structure.

The inner wall of the round hole of the guide sleeve 17 is provided with a raised second boss 71 along the axial direction, the shape of the second boss is consistent with that of a groove 81 on the outer wall of the nut 10, and the second boss and the groove are matched to realize the rotation prevention and the guide functions.

The guide sleeve 17 is provided with a short round hole 74 and a long round hole 73, so that the power pin 22 of the hollow shaft motor 7 and the pin 31 at one side of the angle sensor assembly 16 can extend out of the hollow shaft motor 7 to be connected with an external circuit conveniently

The outer wall of the hydraulic main cylinder 18 is provided with a sealing groove for installing an outer end sealing ring 21 to realize sealing between the hydraulic main cylinder 18 and the hydraulic block.

The inner wall of the hydraulic main cylinder 18 is provided with a sealing groove for installing an inner end sealing ring 23 to realize the sealing between the piston 24 and the hydraulic main cylinder.

The inner wall of the hydraulic main cylinder 18 is provided with a circular groove for installing a guide ring 27, so that when the speed of the piston assembly 9 is too high or the control fails, the piston assembly 9 is prevented from exceeding the limit position, and the functions of buffering and noise reduction are achieved.

The working principle is as follows: the utility model discloses a when using, starter motor drives electric motor rotor 8 and rotates, the gomphosis of second tangent plane 62 and first tangent plane 53 in the electric motor rotor 8, thereby it rotates to drive lead screw 11, lead screw 11 drives removal nut 10 when pivoted and removes, removal nut 10 is through the slot 81 of both sides along second boss 71 rectilinear movement in uide bushing 17, thereby drive piston 24 and do work in hydraulic master cylinder 18, pressure is established in hydraulic master cylinder 18, this unit is installed on hydraulic block, through the solenoid valve switching on the hydraulic block, communicate pressure oil in the different oil circuits.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A pressure supply unit of an automobile brake system comprises a hollow shaft motor (7), and is characterized in that: the hollow shaft motor (7) is provided with end cover (1) in one side connection, hollow shaft motor (7) internal connection is provided with electric motor rotor (8), electric motor rotor (8) inside side connection is provided with piston assembly (9), piston assembly (9) one end connection is provided with uide bushing (17), uide bushing (17) one side connection is provided with hydraulic pressure master cylinder (18), uide bushing (17) with it is provided with angle sensor subassembly (16) to connect between hollow shaft motor (7).

2. A brake system pressure supply unit for an automobile according to claim 1, wherein: end cover (1) one side is connected and is provided with fixing bolt (5), fixing bolt (5) one end runs through end cover (1) and with hollow shaft motor (7) are connected and are set up, hollow shaft motor (7) with it is provided with first sealing washer (2) to connect between fixing bolt (5), hollow shaft motor (7) one side is connected and is provided with external connection bolt (111).

3. A brake system pressure supply unit for an automobile according to claim 1, wherein: motor rotor (8) include casing (65), casing (65) both sides are connected and are provided with response rotor (61), casing (65) one side is equipped with hole (64), hole (64) one side is equipped with the second and cuts plane (62), the second is cut plane (62) one side and is connected and be provided with first boss (63), casing (65) with piston assembly (9) are connected and are set up.

4. A brake system pressure supply unit for a vehicle according to claim 3, wherein: the piston assembly (9) comprises a screw rod (11), one end of the screw rod (11) is connected with a movable nut (10), and one side of the movable nut (10) is connected with a piston (24).

5. The automotive brake system pressure supply unit according to claim 4, characterized in that: one side of the screw rod (11) is connected with a cylindrical surface (51), one end of the cylindrical surface (51) is provided with a chamfer (52), and one end of the cylindrical surface (51) is provided with a first tangent plane (53).

6. The automotive brake system pressure supply unit according to claim 5, characterized in that: a hexagonal hole (41) is formed in one end of the piston (24), and a connecting groove (42) is formed in one end, far away from the hexagonal hole (41).

7. The pressure supply unit of the automotive brake system according to claim 6, wherein: the movable nut is characterized in that one end of the movable nut (10) is connected with a connecting end (82), grooves (81) are formed in two sides of the movable nut (10), and a third boss (83) is connected to one side of the inner wall.

8. The pressure supply unit of the automotive brake system according to claim 7, wherein: lead screw (11) one end extends to in casing (65), hole (64) are run through to face of cylinder (51) one end, and connect and be provided with connecting bolt (4), connecting bolt (4) one end is connected and is provided with snap ring (30), snap ring (30) surface connection is provided with bearing (3), bearing (3) outer lane is fixed to be set up hollow shaft motor (7) inner wall one side, wherein first tangent plane (53) one side with second tangent plane (62) gomphosis.

9. The pressure supply unit of the automotive brake system according to claim 8, wherein: guide sleeve (17) inner wall one side is connected and is provided with second boss (71), guide sleeve (17) one end both sides are connected and are provided with stopper (72), slotted hole (73) and short round hole (74) have been seted up to guide sleeve (17) one side, second boss (71) with slot (81) sliding connection, hollow shaft motor (7) one side is connected and is provided with power contact pin (22), angle sensor subassembly (16) one side is connected and is provided with signal pin (31), signal pin (31) with power contact pin (22) run through the correspondence respectively slotted hole (73) and short round hole (74).

10. A brake system pressure supply unit for a vehicle according to claim 9, wherein: the outer ring of the hydraulic main cylinder (18) is connected with an outer end sealing ring (21), the inner ring of the hydraulic main cylinder is connected with an inner end sealing ring (23) and a guide ring (27), and one end of the piston (24) extends into the hydraulic main cylinder (18).