Service braking and parking braking integrated device, drive axle assembly and vehicle

Abstract

The invention relates to a driving braking and parking braking integrated device, a drive axle assembly and a vehicle. The driving braking and parking braking integrated device comprises a friction assembly, a driving braking assembly and a parking braking assembly. The service braking assembly is arranged on one side of the friction assembly; the parking braking assembly is arranged on the side, away from the friction assembly, of the traveling braking assembly. During parking braking, the parking braking assembly drives the service braking assembly, so that the service braking assembly drives the friction assembly to decelerate the transmission shaft. The drive axle assembly aims at solving the technical problems that a drive axle assembly in the prior art is large in occupied size, friction plates are seriously abraded, and the service life is short.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and in particular to an integrated device of service brake and parking brake, a drive axle assembly and a vehicle. Background Art

[0002] In the related art, the parking function of the drive axle assembly is achieved by pushing the friction plate with the parking brake piston so that it is pressed against the steel plate, and the driving function is achieved by pushing the friction plate with the service brake piston so that it is pressed against the steel plate. In order to prevent interference between the parking brake piston and the service brake piston, they are often arranged in an up-and-down manner, which makes the drive axle larger in size, and both the service brake piston and the parking brake piston press the edge of the friction plate, which is prone to eccentric wear and affects the service life of the friction plate. Summary of the invention

[0003] The present application provides an integrated device of service brake and parking brake, a drive axle assembly and a vehicle, aiming to solve the technical problems in the related art that the drive axle assembly occupies a large volume, the friction plate is severely worn and the service life is short.

[0004] In order to achieve the above-mentioned object, according to a first aspect of the present application, there is provided an integrated device for service brake and parking brake, comprising:

[0005] Friction components;

[0006] A service brake assembly, wherein the friction assembly is arranged on one side of the service brake assembly; and

[0007] A parking brake assembly, the parking brake assembly being arranged on the other side of the service brake assembly;

[0008] During parking braking, the parking brake assembly drives the service brake assembly, so that the service brake assembly drives the friction assembly to decelerate the transmission shaft.

[0009] Optionally, a piston mounting seat is also included;

[0010] The service brake assembly comprises a service brake piston, and the service brake piston is movably mounted on the piston mounting seat;

[0011] During service braking, the service brake piston abuts against the friction assembly.

[0012] Optionally, the parking brake assembly comprises a parking brake piston, and the parking brake piston is movably mounted on the piston mounting seat;

[0013] During parking braking, the parking brake piston abuts against the service brake piston.

[0014] Optionally, the service brake piston comprises a service abutment portion and a brake abutment portion which are arranged opposite to each other along the axial direction of the service brake assembly;

[0015] The parking brake piston comprises a parking abutment portion, the parking abutment portion is adapted to abut against the driving abutment portion, and the braking abutment portion is adapted to abut against the friction assembly.

[0016] Optionally, the friction assembly comprises a first deceleration portion, a second deceleration portion and a third deceleration portion which are concentric with the friction assembly, the second deceleration portion is located between the first deceleration portion and the third deceleration portion, and the first deceleration portion, the second deceleration portion and the third deceleration portion have the same radial width;

[0017] Wherein, the braking abutment portion is suitable for abutting against the second deceleration portion.

[0018] Optionally, the orthographic projection of the driving abutment portion on the braking abutment portion is located within the boundary of the braking abutment portion.

[0019] Optionally, the piston mounting seat comprises a driving piston mounting seat, and the driving piston mounting seat is provided with a driving piston cavity;

[0020] The service brake piston further comprises a service connection portion, wherein the service connection portion is connected between the service abutment portion and the brake abutment portion, and the service connection portion is movably mounted in the service piston chamber.

[0021] Optionally, a driving boss is provided on the outer peripheral side of the driving connection portion, and the driving piston cavity is suitable for being filled with a driving medium, wherein the driving medium is suitable for pushing the driving boss so that the driving brake piston abuts against the friction assembly.

[0022] Optionally, the piston mounting seat includes a traveling piston mounting seat, and a guide column is provided in the traveling piston mounting seat, and the guide column passes through the traveling abutment portion so that the traveling abutment portion is movably mounted on the guide column.

[0023] Optionally, the piston mounting seat further includes a parking piston mounting seat connected to the driving piston mounting seat, and the parking brake piston is movably mounted on the parking piston mounting seat, wherein the guide column passes through the driving abutment portion and is mounted on the parking piston mounting seat.

[0024] Optionally, the guide column is detachably mounted on the parking piston mounting seat.

[0025] Optionally, the parking piston mounting seat comprises a first sub-seat and a second sub-seat, wherein the first sub-seat is located at the outer peripheral side of the second sub-seat to enclose a parking piston cavity together with the second sub-seat to movably mount the parking brake piston;

[0026] Wherein, the guide column passes through the driving abutment portion and is installed on the second sub-seat.

[0027] Optionally, the service brake assembly further comprises a service elastic member, wherein the service elastic member is connected to the guide column and the service brake piston.

[0028] Optionally, during parking brake application, the service elastic member is in an elastically compressed state and has elastic potential energy for driving the service brake piston to reset.

[0029] Optionally, the piston mounting seat further includes a parking piston mounting seat, and the parking piston mounting seat is provided with a parking piston cavity; the parking brake piston further includes a parking movable portion connected to the parking abutment portion; wherein the parking movable portion is movably mounted on the parking piston cavity.

[0030] Optionally, the parking piston chamber is suitable for being filled with a driving medium, and the driving medium is suitable for pushing the parking movable portion so that the parking abutment portion moves away from the driving abutment portion.

[0031] Optionally, the parking piston mounting seat includes a first sub-seat and a second sub-seat, and the first sub-seat is located on the outer peripheral side of the second sub-seat to enclose the parking piston cavity together with the second sub-seat.

[0032] Optionally, the parking abutment portion is provided with a guide groove, and the parking abutment portion is movably mounted on the second sub-seat through the guide groove.

[0033] Optionally, the opening direction of the guide groove is opposite to the opening direction of the parking piston chamber.

[0034] Optionally, the parking brake assembly further comprises a parking elastic member, wherein the parking elastic member is connected to the parking movable portion and the parking piston mounting seat.

[0035] Optionally, when the parking brake is released, the parking elastic member is in an elastically compressed state and has elastic potential energy for pushing the parking movable portion so that the parking abutting portion abuts against the driving abutting portion.

[0036] Optionally, the parking piston mounting seat is connected to a braking abutment, and the braking abutment is provided with a through hole, and the through hole is used to install a differential bearing; wherein the parking elastic member is connected to the parking movable part and the braking abutment.

[0037] Optionally, the friction assembly includes a plurality of first combining plates and at least one second combining plate, a second combining plate is provided between two adjacent first combining plates, at least one second combining plate is connected to the transmission shaft, and two adjacent first combining plates are connected by a first elastic member;

[0038] Wherein, the service brake assembly is arranged on one side of the first combining plate.

[0039] According to a second aspect of the present application, a drive axle assembly is provided, comprising the above-mentioned integrated device of service brake and parking brake.

[0040] Optionally, it also includes a motor, a differential and a reducer, the differential is arranged at the output end of the motor, the integrated device of service brake and parking brake is arranged on the side of the differential away from the motor, and the reducer is arranged on the side of the integrated device of service brake and parking brake away from the differential.

[0041] According to a third aspect of the present application, a vehicle is also provided, comprising the above-mentioned drive axle assembly.

[0042] Beneficial effects of this application:

[0043] In the technical solution of the present application, the friction component is arranged on one side of the service brake component, the service brake component is used to drive the friction component to work, and the parking brake component is arranged on the other side of the service brake component; when parking brake is applied, the parking brake component drives the service brake component, so that the service brake component drives the friction component to decelerate the transmission shaft. With such an arrangement, the friction component only needs to be connected to the service brake component by driving. When connected, there is no need to consider the positional relationship between the parking brake component and the friction component, only the positional relationship between the service brake component and the friction component needs to be considered. The contact area between the service brake component and the friction component is increased, so that the friction component is subjected to more uniform force, avoiding the phenomenon of eccentric wear of the friction component due to uneven force, and increasing the service life of the friction component.

[0044] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0046] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0047] Figure 1 It is a full cross-sectional schematic diagram of an embodiment of an integrated device for service brake and parking brake provided by the present application;

[0048] Figure 2 yes Figure 1 A schematic diagram of the structure of the driving brake assembly, the parking brake assembly and the piston mounting seat;

[0049] Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle;

[0050] Figure 4 yes Figure 1 A schematic diagram of the structure of the cooperation between the driving brake piston and the friction assembly;

[0051] Figure 5 yes Figure 1 A front view of the friction assembly;

[0052] Figure 6 It is a structural schematic diagram of an embodiment of a drive axle assembly provided by the present application;

[0053] Figure 7 yes Figure 6 Overall cross-sectional view of the middle drive axle.

[0054] Description of reference numerals:

[0055] 1000. Drive axle assembly;

[0056] 100, integrated device of driving brake and parking brake; 10, friction assembly; 11, first deceleration part; 12, second deceleration part; 13, third deceleration part; 14, first coupling plate; 15, second coupling plate; 16, first elastic member; 20, driving brake assembly; 21, driving brake piston; 211, driving abutment part; 212, brake abutment part; 213, driving connection part; 2131, driving boss; 22, driving elastic member; 30, Parking brake assembly; 31, parking brake piston; 311, parking abutment; 3111, guide groove; 312, parking movable part; 32, parking elastic member; 40, piston mounting seat; 41, driving piston mounting seat; 411, driving piston cavity; 42, guide column; 43, parking piston mounting seat; 431, first sub-seat; 432, second sub-seat; 433, parking piston cavity; 50, brake abutment; 51, perforation; 60, transmission shaft;

[0057] 200, motor;

[0058] 300, differential;

[0059] 400. Reducer. DETAILED DESCRIPTION

[0060] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0061] In the related art, the parking function of the drive axle assembly is achieved by pushing the friction plate with the parking brake piston so that it is pressed against the steel plate, and the driving function is achieved by pushing the friction plate with the service brake piston so that it is pressed against the steel plate. In order to prevent interference between the parking brake piston and the service brake piston, they are often arranged in an up-and-down manner, which makes the drive axle larger in size, and both the service brake piston and the parking brake piston press the edge of the friction plate, which is prone to eccentric wear and affects the service life of the friction plate.

[0062] In view of this, the present application proposes an integrated device 100 for driving brake and parking brake. Figures 1 to 5 This is a structural schematic diagram of an embodiment of the integrated device 100 for driving brake and parking brake provided in the present application. The integrated device 100 for driving brake and parking brake provided in the present application has a simple structure, high space utilization, and less wear on the friction component 10. The integrated device 100 for driving brake and parking brake will be described in detail below in conjunction with the main drawings.

[0063] According to a first aspect of the present application, a service brake and parking brake integrated device 100 is provided. Figure 1 The integrated device 100 of service brake and parking brake includes a friction assembly 10, a service brake assembly 20 and a parking brake assembly 30. The service brake assembly 20 is arranged on one side of the friction assembly 10; the parking brake assembly 30 is arranged on the side of the service brake assembly 20 away from the friction assembly 10; wherein, during parking brake, the parking brake assembly 30 drives the service brake assembly 20, so that the service brake assembly 20 drives the friction assembly 10 to decelerate the transmission shaft 60.

[0064] In the technical solution of the present application, the service brake assembly 20 is arranged on one side of the friction assembly 10, and the service brake assembly 20 is used to drive the friction assembly 10 to work. The parking brake assembly 30 is arranged on the side of the service brake assembly 20 away from the friction assembly 10; when parking brake is applied, the parking brake assembly 30 drives the service brake assembly 20, so that the service brake assembly 20 drives the friction assembly 10 to decelerate the transmission shaft 60. With such an arrangement, the friction assembly 10 only needs to be connected to the service brake assembly 20 by driving. When connected, there is no need to consider the positional relationship between the parking brake assembly 30 and the friction assembly 10, and only the positional relationship between the service brake assembly 20 and the friction assembly 10 needs to be considered. The contact area between the service brake assembly 20 and the friction assembly 10 is increased, so that the friction assembly 10 is subjected to more uniform force, and the eccentric wear of the friction assembly 10 due to uneven force is avoided, thereby increasing the service life of the friction assembly 10.

[0065] In some embodiments, the integrated device 100 for service brake and parking brake also includes a housing and a transmission shaft 60, the transmission shaft 60 is rotatably mounted on the housing, the friction assembly 10, the service brake assembly 20 and the parking brake assembly 30 are integrated in the housing, and are all rotatably mounted on the transmission shaft 60; the friction assembly 10 includes a first bonding plate 14 and a second bonding plate 15, the second bonding plate 15 is relatively fixed to the housing, and the first bonding plate 14 can slide relative to the second bonding plate 15 to abut or separate from the second bonding plate 15.

[0066] In some embodiments, please refer to Figure 1 and Figure 2 The integrated device 100 of the service brake and the parking brake further includes a piston mounting seat 40, which is mounted in the housing, and the service brake assembly 20 and the parking brake assembly 30 are both arranged on the mounting seat.

[0067] Further, in some embodiments, the service brake assembly 20 includes a service brake piston 21, and the service brake piston 21 is movably mounted on the piston mounting seat 40, wherein during service braking, the service brake piston 21 abuts against the friction assembly 10. Specifically, the service brake piston 21 is connected to the first bonding plate 14 of the friction assembly 10. During service braking, the service brake piston 21 moves along the axial direction of the transmission shaft 60, driving the first bonding plate 14 to move in a direction close to the second bonding plate 15, so that the first bonding plate 14 and the second bonding plate 15 abut. When the service brake is released, the service brake piston 21 moves along the axial direction of the transmission shaft 60, driving the first bonding plate 14 to move in a direction away from the second bonding plate 15, so that the first bonding plate 14 and the second bonding plate 15 are separated.

[0068] Please continue reading Figure 1 and Figure 2The parking brake assembly 30 includes a parking brake piston 31, which is movably mounted on a piston mounting seat 40; wherein, during parking brake, the parking brake piston 31 abuts against the service brake piston 21. Specifically, the service brake piston 21 is connected to the first bonding plate 14 of the friction assembly 10, and the parking brake piston 31 is connected to the service brake piston 21. During parking brake, the parking brake piston 31 moves along the axial direction of the transmission shaft 60, driving the service brake piston 21 to connect with the first bonding plate 14, thereby driving the first bonding plate 14 to move in a direction close to the second bonding plate 15, so that the first bonding plate 14 and the second bonding plate 15 abut. When the parking brake is released, the parking brake piston 31 moves along the axial direction of the transmission shaft 60, driving the service brake piston 21 to separate from the first bonding plate 14, thereby causing the first bonding plate 14 to move in a direction away from the second bonding plate 15, so that the first bonding plate 14 and the second bonding plate 15 are separated.

[0069] In some embodiments, please refer to Figure 2 The service brake piston 21 includes a service abutment portion 211, a service connection portion 213 and a brake abutment portion 212 which are arranged opposite to each other along the axial direction of the service brake assembly 20. More specifically, the service brake piston 21 is formed with a receiving chamber, the opening of which is arranged toward the friction assembly 10; the receiving chamber includes a chamber wall and a chamber bottom, the chamber wall of the chamber is connected to the friction assembly 10, and the chamber bottom of the chamber is connected to the parking brake piston 31, that is, the opening end of the chamber wall of the chamber is the deceleration ground connection portion, the chamber bottom of the chamber is the service abutment portion 211, and the chamber side wall of the chamber is the service connection portion 213. With such an arrangement, the volume of the service brake piston 21 is reduced, the space is reasonably utilized, and thus the integrated device 100 of service brake and parking brake is reduced.

[0070] In some embodiments, please refer to Figure 2 The parking brake piston 31 includes a parking abutment portion 311 and a parking movable portion 312. The parking abutment portion 311 is suitable for abutting against the driving abutment portion 211, and the brake abutment portion 212 is suitable for abutting against the friction assembly 10. In this embodiment, during parking braking, the parking brake abutment portion abuts against the driving abutment portion 211, pushing the driving abutment portion 211 to move, so that the driving abutment portion 211 abuts against the first bonding piece 14, and the driving abutment portion 211 pushes the first bonding piece 14, so that the first bonding piece 14 and the second bonding piece 15 abut.

[0071] In some embodiments, see Figure 4 and Figure 5The friction assembly 10 has a first deceleration part 11, a second deceleration part 12 and a third deceleration part 13 which are concentric with the friction assembly 10, the second deceleration part 12 is located between the first deceleration part 11 and the third deceleration part 13, the first deceleration part 11 is located on the outside, and the third deceleration part 13 is located on the inside, wherein the brake abutment part 212 is suitable for abutting the second deceleration part 12. In this way, the deceleration part can abut the middle position of the friction assembly 10, the friction assembly 10 is subjected to a more uniform force, the phenomenon of eccentric wear is avoided, and the service life of the friction assembly 10 is improved.

[0072] It should be noted that Figure 5 The auxiliary dotted lines at c and d do not exist in the actual product, and the dotted lines at c and d here are just for the convenience of understanding the first speed reduction part 11, the second speed reduction part 12 and the third speed reduction part 13.

[0073] Further, in this embodiment, please continue to refer to Figure 4 and Figure 5 The radial widths of the first deceleration part 11, the second deceleration part 12 and the third deceleration part 13 are equal; the radial widths of the first deceleration part 11, the second deceleration part 12 and the third deceleration part 13 are reasonably distributed so that the force of the friction component 10 is close to the center position of the friction component 10, thereby ensuring that the force of the friction component 10 is more uniform, avoiding the phenomenon of eccentric wear, and improving the service life of the friction component 10.

[0074] In some embodiments, the orthographic projection of the driving abutment portion 211 on the braking abutment portion 212 is located within the boundary of the braking abutment portion 212. This arrangement makes the diameter of the side of the driving brake piston 21 close to the parking brake piston 31 smaller, which facilitates the design of the parking brake piston 31.

[0075] See 2 and Figure 3 The piston mounting seat 40 includes a driving piston mounting seat 41, and the driving piston mounting seat 41 is provided with a driving piston cavity 411; the driving brake piston 21 also includes a driving connection portion 213, and the driving connection portion 213 is connected between the driving abutment portion 211 and the brake abutment portion 212, and the driving connection portion 213 is movably mounted in the driving piston cavity 411. Specifically, when driving braking is required, hydraulic oil enters the driving piston cavity 411 from the driving brake oil inlet, and the driving piston cavity 411 is filled with hydraulic oil. As the hydraulic pressure in the driving piston cavity 411 continues to increase, the driving brake piston 21 is pushed by the hydraulic pressure and moves toward the direction of the friction assembly 10, driving the first bonding plate 14 to slide until the first bonding plate 14 abuts against the second bonding plate 15, completing the driving braking.

[0076] Please continue reading Figure 3A driving boss 2131 is provided on the outer peripheral side of the driving connection portion 213, and the driving piston cavity 411 is suitable for filling with a driving medium, wherein the driving medium is suitable for pushing the driving boss 2131, so that the driving brake piston 21 abuts against the friction assembly 10. A driving piston cavity 411 is formed between the driving boss 2131 and the piston mounting seat 40, and a driving brake oil inlet is formed on the housing, and the driving brake oil inlet is connected to the driving piston cavity 411, so as to inject hydraulic oil into the driving piston cavity 411, thereby driving the driving brake piston 21 to move.

[0077] See also Figure 2 The integrated device 100 for driving brake and parking brake further includes a guide column 42. A first through hole is formed on the driving abutment portion 211. The guide column 42 passes through the first through hole and is fixedly connected to the driving piston mounting seat 41, so that the driving abutment portion 211 is movably mounted on the guide column 42. In this embodiment, the guide column 42 is located in the accommodating cavity of the driving brake piston 21 and does not occupy additional space.

[0078] In some embodiments, please refer to Figure 1 and Figure 2 The service brake assembly 20 further includes a service elastic member 22, which is connected to the guide column 42 and the service brake piston 21. One end of the service elastic member 22 is fixedly abutted against the guide column 42, and the other end of the service elastic member 22 abuts against the service ground abutment portion; that is, the service elastic member 22 is sleeved on the guide column 42, and a clamping block is formed at one end of the guide column 42 away from the bottom of the accommodating cavity, and the clamping block is clamped with the service elastic member 22, thereby fixing the service elastic member 22.

[0079] Optionally, during parking brake, the service elastic member 22 is in an elastically compressed state and has elastic potential energy to drive the service brake piston 21 to reset. Specifically, when the service brake needs to be released, the hydraulic oil is discharged and leaves the service brake piston 21 cavity. As the hydraulic oil in the service brake piston 21 cavity decreases, the hydraulic pressure in the service brake piston 21 cavity decreases, and the service elastic member 22 begins to rebound. Under the action of the elastic restoring force of the service elastic member 22, the service brake piston 21 moves away from the friction assembly 10, thereby driving the first bonding plate 14 and the second bonding plate 15 to separate, and the service brake is released.

[0080] In some embodiments, the travel elastic member 22 is a spring.

[0081] Exemplarily, the piston mounting seat 40 also includes a parking piston mounting seat 43, which is connected to the driving piston mounting seat 41, and the parking piston seat is located at the end of the driving piston seat away from the driving piston, and the parking brake piston 31 is movably mounted on the parking piston mounting seat 43.

[0082] In some embodiments, the guide post 42 passes through the driving abutment portion 211 and is mounted on the parking piston mounting seat 43 .

[0083] Optionally, the guide column 42 is detachably mounted on the parking piston mounting seat 43, and such a configuration facilitates disassembly and maintenance.

[0084] Please continue reading Figure 2 In some embodiments, the parking piston mounting seat 43 includes a first sub-seat 431 and a second sub-seat 432. The first sub-seat 431 is located on the outer peripheral side of the second sub-seat 432 to enclose a parking piston cavity 433 together with the second sub-seat 432 to flexibly mount the parking brake piston 31. The guide column 42 passes through the driving abutment portion 211 and is mounted on the second sub-seat 432. In this way, the active stroke of the parking brake piston 31 and the active stroke of the driving brake piston 21 are staggered in the radial direction, which is convenient for space design layout, thereby improving space utilization.

[0085] It should be noted that the outer peripheral side of the first sub-seat 431 constitutes a part of the parking piston chamber 433. If the guide column 42 is installed on the first sub-seat 431, the guide column 42 will interfere with the parking lever. Therefore, the guide column 42 is connected to the second sub-seat 432 to avoid interference with the parking lever through reasonable use of space.

[0086] In this embodiment, the parking brake piston 31 is connected to the service brake piston 21, and the parking brake piston 31 can move along the axial direction of the transmission shaft 60 to drive the service brake piston 21 to move, thereby driving the first combining plate 14 to move, so that the first combining plate 14 and the second combining plate 15 are separated or abutted.

[0087] In some embodiments, the parking piston chamber 433 is suitable for being filled with a driving medium, and the driving medium is suitable for pushing the parking movable portion 312 so that the parking abutting portion 311 moves away from the driving abutting portion 211 .

[0088] Specifically, the parking brake piston 31 also includes a parking abutment portion 311 and a parking movable portion 312 connected thereto; wherein the parking movable portion 312 is movably mounted on the parking piston chamber 433, and the parking abutment portion 311 is connected to the driving piston; in the present embodiment, when the parking brake needs to be released, the hydraulic oil enters the parking piston chamber 433 from the parking oil inlet, and as the hydraulic oil in the parking piston chamber 433 increases, the hydraulic pressure in the parking piston chamber 433 also increases, and the parking brake piston 31 is pushed by the hydraulic pressure, and the parking brake piston 31 is separated from the driving brake piston 21 and no longer abuts against the driving brake piston 21, and the driving brake piston 21 is moved away from the friction assembly 10 by the elastic restoring force of the driving elastic member 22, thereby separating the first bonding plate 14 and the second bonding plate 15, thereby completing the release of the parking brake.

[0089] Exemplarily, the parking brake assembly 30 further includes a parking elastic member 32, which is connected to the parking movable portion 312 and the parking piston mounting seat 43. One end of the parking elastic member 32 is fixed, and the other end of the parking elastic member 32 abuts against the parking movable portion 312, and abuts against the side of the parking movable portion 312 away from the parking piston chamber 433.

[0090] For example, when the parking brake is released, the parking elastic member 32 is in an elastically compressed state and has elastic potential energy to push the parking movable portion 312 so that the parking abutting portion 311 abuts against the driving abutting portion 211. When the parking brake is applied, under the elastic restoring force of the parking elastic member 32, the parking brake piston 31 moves toward the side close to the friction assembly 10, so as to drive the parking brake piston 31 to move toward the direction close to the friction assembly 10, so as to drive the first bonding plate 14 and the second bonding plate 15 to abut against each other.

[0091] In some embodiments, the parking elastic member 32 is a spring.

[0092] In some embodiments, please refer to Figure 1 and Figure 2 The parking piston mounting seat 43 includes a first sub-seat 431 and a second sub-seat 432. The first sub-seat 431 is located on the outer peripheral side of the second sub-seat 432 to form a parking piston cavity 433 together with the second sub-seat 432. The parking movable part 312 is movably mounted in the parking piston cavity 433.

[0093] In some embodiments, please refer to Figure 2 The parking abutment portion 311 is provided with a guide groove 3111, and the parking abutment portion 311 is movably mounted on the second sub-seat 432 through the guide groove 3111. Specifically, the guide groove 3111 plays a guiding role, so that the parking movable portion 312 can only move within the guide groove 3111, making the movement of the parking movable portion 312 more stable.

[0094] Furthermore, the opening direction of the guide groove 3111 is opposite to the opening direction of the parking piston chamber 433. The opposite arrangement can offset part of the driving force, making the movement more stable.

[0095] Optionally, the parking piston mounting seat 43 is connected to a brake abutment 50 , which is arranged on the side of the parking brake piston 31 away from the service brake piston 21 , one end of the parking elastic member 32 is fixedly connected to the brake abutment 50 , and the other end of the parking elastic member 32 is connected to the parking movable part 312 .

[0096] Further, in some embodiments, please continue to refer to Figure 1 and Figure 2The brake abutment 50 is provided with a through hole 51, and the through hole 51 is used to install the differential bearing; such a configuration realizes the functional reuse of the brake abutment 50, which serves as the abutment base of the parking elastic member 32 and is also used to install the differential bearing.

[0097] Specifically, when the parking brake needs to be released, hydraulic oil enters the parking piston chamber 433 from the parking oil inlet. As the hydraulic oil in the parking piston chamber 433 increases, the hydraulic pressure in the parking piston chamber 433 also increases. The parking brake piston 31 is pushed by the hydraulic pressure, and the parking brake piston 31 compresses the parking elastic member 32, thereby separating from the service brake piston 21 and no longer abutting the service brake piston 21. The service brake piston 21 is moved away from the friction assembly 10 by the elastic restoring force of the parking elastic member 32, thereby separating the first bonding plate 14 and the second bonding plate 15, thereby completing the release of the parking brake.

[0098] During parking braking, the hydraulic oil in the parking piston chamber 433 is discharged, and the parking brake piston 31 is moved toward the service brake piston 21 by the elastic restoring force of the parking elastic member 32, thereby abutting against the service brake piston 21, pushing the service brake piston 21 toward the friction assembly 10, so as to drive the first engaging plate 14 to abut against the second engaging plate 15, thereby completing parking braking.

[0099] In some embodiments, please refer to Figure 7 The integrated device 100 for service brake and parking brake also includes a transmission shaft 60, which is rotatably mounted on the housing and is used for transmission. More specifically, in this embodiment, the friction assembly 10, the service brake assembly 20 and the parking brake assembly 30 are sleeved on the transmission shaft 60.

[0100] Please continue reading Figure 1 The integrated device 100 for driving brake and parking brake further includes a brake hub, which is fixedly connected to the transmission shaft 60 and connected to the friction assembly 10 .

[0101] In some embodiments, please refer to Figure 1 The friction assembly 10 includes a plurality of first bonding sheets 14 and at least one second bonding sheet 15, a second bonding sheet 15 is arranged between two adjacent first bonding sheets 14, the second bonding sheet 15 is connected to the brake hub, two adjacent first bonding sheets 14 are connected by a third elastic member, and one of the first bonding sheets 14 is connected to the service brake assembly 20. More specifically, a first through hole is formed at one end of the first bonding sheet 14 away from the brake hub, a first support column is formed on the housing, the first support column passes through the plurality of first through holes in sequence, so that the plurality of first bonding sheets 14 are relatively fixed to the housing, and further, a first elastic member 16 is sleeved on the first support column and is located between two adjacent first bonding sheets 14.

[0102] According to a second aspect of the present application, a drive axle assembly 1000 is provided, which includes the above-mentioned integrated device 100 for driving brake and parking brake. The drive axle assembly 1000 has all the beneficial effects of the above-mentioned integrated device 100 for driving brake and parking brake, which will not be described in detail in this application.

[0103] In some embodiments, reference Figure 6 and Figure 7 The drive axle assembly 1000 also includes a motor 200, a differential 300 and a reducer 400. The differential 300 is arranged at the output end of the motor 200, the integrated device 100 of service brake and parking brake is arranged on the side of the differential 300 away from the motor 200, and the reducer 400 is arranged on the side of the integrated device 100 of service brake and parking brake away from the differential 300.

[0104] For further information, please refer to Figure 7 In this embodiment, the motor 200 is a dual-output shaft motor 200, two integrated devices 100 for driving brake and parking brake are provided, one differential 300 is provided, and one speed reducer 400 is provided. The motor 200 includes a left output shaft and a right output shaft.

[0105] Please continue reading Figure 7 , taking the left side structure as an example, the connection relationship among the motor 200, the differential 300, the integrated device 100 for driving brake and parking brake, and the reducer 400 is explained.

[0106] The differential 300 is disposed on the left side of the motor 200 . The differential 300 includes a left housing and a right housing. The left housing and the right housing are connected by bolts. The right housing is connected to the left output shaft of the motor 200 by a spline.

[0107] The differential 300 also includes a first shaft, which passes through the left housing and the right housing. The differential 300 also includes multiple new planetary gear sets, which are arranged on the first shaft. The planetary gear sets are used to transmit power. The specific setting method of the planetary gear sets and the method of transmitting power can refer to the conventional settings in the field and will not be repeated here.

[0108] In some embodiments, the drive shaft 60 of the integrated device 100 for service braking and parking braking is connected to the first shaft, the differential 300 transmits the power of the motor 200 to the drive shaft 60, and the other end of the drive shaft 60 is connected to the reducer 400, and the drive shaft 60 then transmits the power to the reducer 400.

[0109] The reducer 400 includes a primary driven gear, a secondary sun gear, planetary gears, a planetary gear shaft and a planet carrier. Specifically, an output gear is provided at one end of the transmission shaft 60 away from the differential 300, the primary driven gear meshes with the output gear, the transmission shaft 60 transmits power to the primary driven gear, the primary driven gear meshes with the secondary sun gear at the same time, transmits power to the secondary sun gear, the secondary sun gear meshes with the planetary gears, transmits power to the planetary gears, the planetary gears are mounted on the planetary gear shafts, the planetary gears transmit power to the planetary gear shafts, the planetary gear shafts are connected to the planet carrier at the same time, transmit power to the planet carrier, the tire is mounted on the planet carrier by bolts, thereby driving the tire to move.

[0110] The connection method of the right side structure is the same as that of the left side, except that the right side structure is not provided with a differential 300. The integrated device 100 of the service brake and the parking brake in the right side structure is directly connected to the right output shaft of the motor 200, and the reducer 400 is connected to the integrated device 100 of the service brake and the parking brake.

[0111] According to a third aspect of the present application, a vehicle is provided, which includes the above-mentioned drive axle assembly 1000. The vehicle has all the beneficial effects of the above-mentioned drive axle assembly 1000, which will not be described in detail in the present application.

[0112] The vehicle may be a fuel vehicle, a plug-in hybrid vehicle or a new energy vehicle, etc., and this application does not make any specific limitation on this.

[0113] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0114] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0115] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0116] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. An integrated device for service brake and parking brake, characterized in that: include: Friction components; A service brake assembly, wherein the friction assembly is arranged on one side of the service brake assembly; as well as, A parking brake assembly, the parking brake assembly being arranged on the other side of the service brake assembly; During parking braking, the parking brake assembly drives the service brake assembly, so that the service brake assembly drives the friction assembly to decelerate the transmission shaft.

2. The integrated device of service brake and parking brake according to claim 1, characterized in that: Also included is a piston mount; The service brake assembly comprises a service brake piston, and the service brake piston is movably mounted on the piston mounting seat; During service braking, the service brake piston abuts against the friction assembly.

3. The integrated device of service brake and parking brake according to claim 2, characterized in that: The parking brake assembly includes a parking brake piston, and the parking brake piston is movably mounted on the piston mounting seat; During parking braking, the parking brake piston abuts against the service brake piston.

4. The integrated device of service brake and parking brake according to claim 3, characterized in that: The service brake piston comprises a service abutment portion and a brake abutment portion which are arranged opposite to each other along the axial direction of the service brake assembly; The parking brake piston comprises a parking abutment portion, the parking abutment portion is adapted to abut against the driving abutment portion, and the braking abutment portion is adapted to abut against the friction assembly.

5. The integrated device of service brake and parking brake according to claim 4, characterized in that: The friction assembly comprises a first deceleration portion, a second deceleration portion and a third deceleration portion which are concentric with the friction assembly, the second deceleration portion is located between the first deceleration portion and the third deceleration portion, and the first deceleration portion, the second deceleration portion and the third deceleration portion have the same radial width; Wherein, the braking abutment portion is suitable for abutting against the second deceleration portion.

6. The integrated device of service brake and parking brake according to claim 4, characterized in that: The orthographic projection of the driving abutment portion on the braking abutment portion is located within the boundary of the braking abutment portion.

7. The integrated device of service brake and parking brake according to claim 4, characterized in that: The piston mounting seat comprises a driving piston mounting seat, and the driving piston mounting seat is provided with a driving piston cavity; The service brake piston further comprises a service connection portion, wherein the service connection portion is connected between the service abutment portion and the brake abutment portion, and the service connection portion is movably mounted in the service piston chamber.

8. The integrated device of service brake and parking brake according to claim 7, characterized in that: A driving boss is provided on the outer peripheral side of the driving connection portion, and the driving piston cavity is suitable for being filled with a driving medium, wherein the driving medium is suitable for pushing the driving boss so that the driving brake piston abuts against the friction assembly.

9. The integrated device of service brake and parking brake according to claim 4, characterized in that: The piston mounting seat comprises a traveling piston mounting seat, a guide column is arranged in the traveling piston mounting seat, and the guide column passes through the traveling abutment portion so that the traveling abutment portion is movably mounted on the guide column.

10. The integrated device of service brake and parking brake according to claim 9, characterized in that: The piston mounting seat also includes a parking piston mounting seat connected to the driving piston mounting seat, and the parking brake piston is movably mounted on the parking piston mounting seat, wherein the guide column passes through the driving abutment portion and is mounted on the parking piston mounting seat.

11. The integrated device of service brake and parking brake according to claim 10, characterized in that: The guide column is detachably mounted on the parking piston mounting seat.

12. The integrated device of service brake and parking brake according to claim 10, characterized in that: The parking piston mounting seat comprises a first sub-seat and a second sub-seat, wherein the first sub-seat is located at the outer peripheral side of the second sub-seat to enclose a parking piston cavity together with the second sub-seat to movably mount the parking brake piston; Wherein, the guide column passes through the driving abutment portion and is installed on the second sub-seat.

13. The integrated device of service brake and parking brake according to claim 9, characterized in that: The service brake assembly further comprises a service elastic member, wherein the service elastic member is connected to the guide column and the service brake piston.

14. The integrated device of service brake and parking brake according to claim 13, characterized in that: During parking brake, the service elastic member is in an elastically compressed state and has elastic potential energy for driving the service brake piston to return to its original position.

15. The integrated device of service brake and parking brake according to claim 4, characterized in that: The piston mounting seat also includes a parking piston mounting seat, and the parking piston mounting seat is provided with a parking piston cavity; the parking brake piston also includes a parking movable portion connected to the parking abutment portion; wherein the parking movable portion is movably mounted on the parking piston cavity.

16. The integrated device of service brake and parking brake according to claim 15, characterized in that: The parking piston chamber is suitable for being filled with a driving medium, and the driving medium is suitable for pushing the parking movable portion so that the parking abutting portion is away from the driving abutting portion.

17. The integrated device of service brake and parking brake according to claim 15, characterized in that: The parking piston mounting seat includes a first sub-seat and a second sub-seat, wherein the first sub-seat is located on the outer peripheral side of the second sub-seat to enclose the parking piston chamber together with the second sub-seat.

18. The integrated device of service brake and parking brake according to claim 17, characterized in that: The parking abutment portion is provided with a guide groove, and the parking abutment portion is movably mounted on the second sub-seat through the guide groove.

19. The integrated device of service brake and parking brake according to claim 18, characterized in that: The opening direction of the guide groove is opposite to the opening direction of the parking piston chamber.

20. The integrated device of service brake and parking brake according to claim 15, characterized in that: The parking brake assembly further comprises a parking elastic member, wherein the parking elastic member is connected to the parking movable portion and the parking piston mounting seat.

21. The integrated device of service brake and parking brake according to claim 20, characterized in that: When the parking brake is released, the parking elastic member is in an elastically compressed state and has elastic potential energy for pushing the parking movable portion so that the parking abutting portion abuts against the driving abutting portion.

22. The integrated device of service brake and parking brake according to claim 20, characterized in that: The parking piston mounting seat is connected with a brake abutment, and the brake abutment is provided with a through hole, and the through hole is used to install a differential bearing; wherein the parking elastic member is connected to the parking movable part and the brake abutment.

23. The integrated device of service brake and parking brake according to claim 1, characterized in that: The friction assembly includes a plurality of first combining plates and at least one second combining plate, wherein a second combining plate is provided between two adjacent first combining plates, at least one second combining plate is connected to the transmission shaft, and two adjacent first combining plates are connected by a first elastic member; Wherein, the service brake assembly is arranged on one side of the first combining plate.

24. A drive axle assembly, characterized in that: An integrated device comprising service brake and parking brake as described in any one of claims 1-23.

25. The drive axle assembly according to claim 24, characterized in that: It also includes a motor, a differential and a reducer, wherein the differential is arranged at the output end of the motor, the integrated device of the service brake and the parking brake is arranged on the side of the differential away from the motor, and the reducer is arranged on the side of the integrated device of the service brake and the parking brake away from the differential.

26. A vehicle, characterized in that: Comprising a drive axle assembly as claimed in claim 24 or 25.

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