CN114083939B

CN114083939B - Brake anti-lock braking system, wheel rim assembly and vehicle

Info

Publication number: CN114083939B
Application number: CN202111391315.XA
Authority: CN
Inventors: 苗士军; 李贺; 冯涛
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2023-06-30
Anticipated expiration: 2041-11-23
Also published as: CN114083939A

Abstract

The invention belongs to the technical field of vehicle engineering, and discloses a brake anti-lock braking system, a wheel rim assembly and a vehicle, wherein the brake anti-lock braking system comprises a wheel hub, a hub spindle nose, an oil seal assembly and a speed measuring assembly, in the braking process, the wheel hub rotates relative to the hub spindle nose, an annular mounting cavity is defined between a sealing mounting part of the wheel hub and the outer wall of the hub spindle nose, the oil seal assembly is arranged in the annular mounting cavity in a sealing manner and is used for blocking lubricating grease from overflowing, the speed measuring assembly passes through a mounting through hole on the oil seal assembly and stretches into the annular mounting cavity, the real-time rotating speed of the wheel hub in the braking process can be measured, so that the system can rapidly judge the locking state of the wheel, the braking state of the wheel is always at an optimal point, and the speed measuring assembly is arranged in the mounting through hole of the oil seal assembly without additionally arranging a bracket structure, so that the mounting space of the wheel rim part is saved, and the production cost is reduced.

Description

Brake anti-lock braking system, wheel rim assembly and vehicle

Technical Field

The invention relates to the technical field of vehicle engineering, in particular to a brake anti-lock braking system, a wheel rim assembly and a vehicle.

Background

The anti-lock braking system (antilock brake system) is called ABS for short, and is used for automatically controlling the braking force of a brake when the automobile brakes, realizing deceleration and simultaneously ensuring that the wheels are not blocked, ensuring that the wheels are in a rolling and sliding state and ensuring that the adhesion force between the wheels and the ground is at a maximum value. Specifically, during braking, the ABS can rapidly judge the locking state of the wheels according to the speed signals transmitted by each wheel speed sensor, and the feedback system ensures that the braking state is always at the optimal point.

In the existing anti-lock system, a speed sensor is usually installed on a sensor bracket, and the sensor bracket is fixedly connected to an axle housing of an automobile drive axle.

Disclosure of Invention

The invention aims to provide a brake anti-lock system, a wheel rim assembly and a vehicle, which can save the installation space of the wheel rim part and reduce the production cost.

To achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, there is provided a brake anti-lock braking system comprising:

the wheel hub comprises a rotary mounting part and a sealing mounting part which are coaxially arranged;

the hub shaft head is rotatably sleeved with the rotary mounting part, and an annular mounting cavity is formed between the sealing mounting part and the outer wall of the hub shaft head;

the oil seal assembly is arranged on the hub axle head in a sealing manner and is positioned in the annular mounting cavity, the sealing mounting part is rotatably sleeved on the oil seal assembly, and the oil seal assembly is provided with a mounting through hole;

and the speed measuring assembly penetrates through the mounting through hole and stretches into the annular mounting cavity to measure the rotating speed of the wheel hub.

As the preferable scheme of the braking anti-lock braking system provided by the invention, the system further comprises a turntable, wherein the turntable is sleeved on the hub axle head at intervals and is connected with the sealing installation part, a plurality of detection holes are uniformly distributed on the turntable along the circumferential direction, and when the wheel hub rotates, one end of the speed measuring assembly extending into the annular installation cavity can be opposite to the plurality of detection holes in sequence so as to acquire the rotating speed of the wheel hub.

As the preferable scheme of the braking anti-lock braking system provided by the invention, the sealing installation part comprises a stop ring surface, and the outer edge of the turntable is clamped between the stop ring surface and the oil seal assembly.

As the preferable scheme of the braking anti-lock braking system provided by the invention, a bushing is arranged between the inner wall of the installation through hole and the outer wall of the speed measuring assembly.

As the preferable scheme of the brake anti-lock braking system provided by the invention, the system further comprises a sealing ring, the inner wall of the installation through hole is provided with a groove along the circumferential direction, the sealing ring is arranged in the groove and is in sealing contact with the outer wall of the speed measuring assembly, and one end of the bushing is abutted against the sealing ring.

As the preferable scheme of the braking anti-lock braking system provided by the invention, the oil seal assembly comprises an oil seal seat ring and an oil seal sleeved on the oil seal seat ring, the oil seal seat ring is sleeved on the hub axle head, the oil seal is clamped between the outer wall of the oil seal seat ring and the inner wall of the seal installation part, and the installation through hole is formed in the oil seal seat ring.

As the preferable scheme of the braking anti-lock braking system provided by the invention, the anti-lock braking system further comprises a bearing, and the rotation installation part is rotationally connected to the hub axle head through the bearing.

As the preferable scheme of the braking anti-lock braking system provided by the invention, the two opposite sides of the oil seal seat ring along the axial direction are respectively provided with a first contact surface and a second contact surface, the hub shaft head is provided with a first limiting part along the circumferential direction, the first limiting part is abutted to the first contact surface, and the second contact surface is abutted to the inner ring of the bearing.

In a second aspect, there is provided a wheel rim assembly comprising a brake antilock braking system as described above.

In a third aspect, there is provided a vehicle comprising a wheel rim assembly as described above.

The invention has the beneficial effects that:

the invention provides a braking anti-lock braking system, which is characterized in that in the braking process, a wheel hub rotates relative to a hub axle head, an annular mounting cavity is defined between a sealing mounting part of the wheel hub and the outer wall of the hub axle head, an oil seal assembly is arranged in the annular mounting cavity in a sealing way and used for blocking lubricating grease from overflowing, a speed measuring assembly penetrates through a mounting through hole on the oil seal assembly and stretches into the annular mounting cavity, and the real-time rotating speed of the wheel hub in the braking process can be measured, so that the system can rapidly judge the locking state of the wheel, the braking state of the wheel is always at an optimal point, and the speed measuring assembly is arranged in the mounting through hole of the oil seal assembly without additionally arranging a bracket structure, thereby saving the mounting space of the wheel edge part and reducing the production cost.

The invention also provides a wheel rim assembly and a vehicle comprising the wheel rim assembly, the wheel rim part has compact and reasonable structure, the material waste is reduced, and the production cost is reduced.

Drawings

FIG. 1 is a schematic diagram of a brake antilock system according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic view of an oil seal race according to an embodiment of the present invention;

FIG. 4 is a front view of the upper half of the ring gear provided by an embodiment of the present invention;

fig. 5 is a cross-sectional view of the upper half of the ring gear provided by an embodiment of the present invention.

In the figure:

1. a wheel hub; 2. hub axle head; 3. an oil seal assembly; 4. a speed measuring component; 5. an annular mounting cavity; 6. a turntable; 7. a bushing; 8. a seal ring; 9. a bearing;

11. a rotation mounting portion; 12. sealing the mounting part; 121. a stop ring surface;

21. a first limit part; 22. a second limit part;

31. an oil seal seat ring; 32. an oil seal;

311. mounting through holes; 312. a groove; 313. a first contact surface; 314. a second contact surface; 315. a race hole; 316. chamfering; 317. a guide hole;

41. a connection part; 42. a stop portion;

61. and (5) detecting the hole.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

In the existing anti-lock braking system (ABS), a speed sensor for measuring speed is generally installed on a sensor bracket, and the sensor bracket is fixedly connected to an axle housing of an automobile driving axle to monitor the rotation speed of wheels. As shown in fig. 1 and 2, the present embodiment provides a brake anti-lock braking system, which includes a wheel hub 1, a hub spindle nose 2, an oil seal assembly 3, and a speed measuring assembly 4.

Referring to fig. 1, a wheel hub 1 includes a rotational mounting portion 11 and a seal mounting portion 12 coaxially disposed. The rotary mounting portion 11 and the seal mounting portion 12 are formed by a through hole opened in the center of the wheel hub 1, wherein the diameter of the hole section corresponding to the rotary mounting portion 11 is smaller than the diameter of the hole section corresponding to the seal mounting portion 12. The rotary mounting part 11 is rotatably sleeved on the hub spindle head 2, and an annular mounting cavity 5 is formed between the inner wall of the sealing mounting part 12 and the outer wall of the hub spindle head 2. The oil seal assembly 3 is arranged on the hub spindle nose 2 in a sealing way and is positioned in the annular mounting cavity 5, the seal mounting part 12 is rotatably sleeved on the oil seal assembly 3, and the outer wall of the oil seal assembly 3 is always in sealing contact with the inner wall of the seal mounting part 12 and is used for preventing lubricating grease from overflowing the annular mounting cavity 5. The oil seal assembly 3 is provided with a mounting through hole 311. The speed measuring assembly 4 passes through the mounting through hole 311 and extends into the annular mounting cavity 5 for measuring the rotational speed of the wheel hub 1.

In the braking process, the wheel hub 1 rotates relative to the hub shaft head 2, the oil seal assembly 3 is always in sealing connection in the annular mounting cavity 5 and used for blocking lubricating grease from overflowing, the speed measuring assembly 4 penetrates through the mounting through hole 311 on the oil seal assembly 3 and stretches into the annular mounting cavity 5, and the real-time rotating speed of the wheel hub 1 in the braking process can be measured, so that the system can rapidly judge the locking state of the wheel, and the braking state of the wheel is always at the optimal point. Through installing the subassembly that tests the speed 4 in the installation through-hole 311 of oil blanket subassembly 3, need not to additionally set up supporting structure and install the subassembly that tests the speed 4, save the installation space at rim position, reduction in production cost.

Optionally, referring to fig. 1 and 2, a turntable 6 is further disposed in the annular mounting cavity 5, and the turntable 6 is sleeved on the hub spindle head 2 at intervals. Namely, a through hole is formed in the center of the turntable 6, the hub spindle head 2 penetrates through the through hole, and the outer wall of the hub spindle head 2 and the wall of the through hole are arranged at intervals. The turntable 6 is connected to the seal mounting portion 12 so that the turntable 6 can rotate synchronously with the wheel hub 1. As shown in fig. 4 and 5, a plurality of detection holes 61 are uniformly distributed on the turntable 6 in the circumferential direction, and the detection holes 61 penetrate the turntable 6. When the wheel hub 1 rotates, the turntable 6 synchronously rotates along with the wheel hub 1, and one end of the speed measuring assembly 4 extending into the annular mounting cavity 5 can be opposite to the plurality of detection holes 61 in sequence, so that the rotating speed of the wheel hub 1 is obtained.

Illustratively, the speed measuring assembly 4 includes a rotation speed sensor, in which an electromagnetic coil capable of generating magnetic lines of force is disposed, and when the turntable 6 rotates with the wheel hub 1, the region between adjacent detection holes 61 cuts the magnetic lines of force, so that an induction signal is generated in the rotation speed sensor, and the induction signal is a pulse signal, through which the real-time rotation speed of the wheel hub 1 in the braking process can be obtained.

Referring to fig. 2, the seal mounting portion 12 includes a stop annular surface 121, and an outer edge of the turntable 6 is clamped between the stop annular surface 121 and the oil seal assembly 3, so as to prevent the turntable 6 from moving axially along itself. The stop annulus 121 is perpendicular to the axis of the hub axle head 2 and, with reference to the orientation of fig. 2, the left side of the turntable 6 is in contact with the stop annulus 121 and the peripheral edge of the turntable 6 is in contact with the inner wall of the seal mounting portion 12.

Alternatively, referring to fig. 1, the oil seal assembly 3 includes an oil seal race 31 and an oil seal 32 fitted over the oil seal race 31. Referring to fig. 3, the center of the oil-sealed race 31 is provided with a race hole 315, and the oil-sealed race 31 is sleeved on the hub axle head 2 through the race hole 315. The mounting through hole 311 is opened on the oil seal retainer 31. The oil seal 32 is sealingly sandwiched between the outer wall of the oil seal race 31 and the inner wall of the seal mount 12. The oil seal 32 is made of rubber material, has certain elasticity, and the oil seal retainer 31 can be made of cast iron, and has higher strength and wear resistance. The cooperation of the oil seal 32 and the oil seal race 31 can ensure that lubricating grease does not leak out. The oil seal retainer 31 made of cast iron is provided with the mounting through holes 311, so that the strength of the oil seal retainer is not excessively weakened. Referring to fig. 2, the outer edge of the turntable 6 is trapped between the stop annulus 121 and the oil seal 32.

Referring to fig. 2, a bushing 7 is provided between the inner wall of the mounting through hole 311 and the outer wall of the velocimeter assembly 4. The bushing 7 has good sealing property and wear resistance, can prevent lubricating grease from overflowing through a gap between the speed measuring assembly 4 and the mounting through hole 311, and can prevent the oil seal race 31 from excessively rapid wear deformation.

Referring to fig. 3, the inner wall of the mounting through hole 311 is provided with a groove 312 in a circumferential ring. The sealing ring 8 is arranged in the groove 312, and the sealing ring 8 is in sealing contact with the outer wall of the speed measuring assembly 4, so that the sealing effect is further improved. Referring to fig. 2, the seal ring 8 is located between the turntable 6 and the bushing 7, and one end of the bushing 7 abuts against the seal ring 8. During installation, the sealing ring 8 can be installed firstly, and then the bushing 7 is installed, so that the operation is convenient.

Referring to fig. 1, a rotational mounting portion 11 of a wheel hub 1 is rotatably coupled to a hub axle head 2 via a bearing 9. The outer ring of the bearing 9 is sleeved on the hub spindle head 2, the rotation installation part 11 is sleeved on the outer ring of the bearing 9, and the rotation installation part 11 can drive the outer ring of the bearing 9 to rotate relative to the inner ring of the bearing 9, so that transmission efficiency is improved.

Referring to fig. 3, axially opposite sides of the oil seal race 31 are provided with a first contact surface 313 and a second contact surface 314, respectively. The first contact surface 313 and the second contact surface 314 are both annular surfaces and perpendicular to the axis of the hub axle head 2. The first limiting part 21 is arranged on the hub spindle head 2 along the circumferential direction in a ring manner, the first limiting part 21 is abutted on the first contact surface 313, and the second contact surface 314 is abutted on the inner ring of the bearing 9, so that the oil seal seat ring 31 is limited between the inner ring of the bearing 9 and the first limiting part 21, and the oil seal seat ring 31 is prevented from moving along the axis of the oil seal seat ring.

Referring to fig. 1, the hub axle head 2 is further provided with a second limiting portion 22 in a circumferential direction, and the second limiting portion 22 is located at one side of the first limiting portion 21 away from the oil seal race 31. The tachometer assembly 4 includes a connection 41 and a stop 42. The connecting portion 41 is in a long column shape, is inserted into the bushing 7, and extends into the annular mounting cavity 5. The detection head of the speed measuring assembly 4 is arranged on the end face of one end of the connecting part 41 extending into the annular mounting cavity 5, and can be aligned with the detection hole 61 of the turntable 6. The stop portion 42 is located outside the mounting through hole 311, and one end of the stop portion, which is far away from the connecting portion 41, can be abutted to the second limiting portion 22, so that the speed measuring assembly 4 is prevented from being separated from the mounting through hole 311 along the axial direction.

Optionally, referring to fig. 3, the center of the oil seal race 31 is also provided with a guide hole 317. The guide hole 317 is coaxially disposed and communicates with the race hole 315. By providing the guide holes 317, the insertion of the hub axle head 2 into the race holes 315 is more rapid and convenient. In addition, the wall of the guide hole 317 is a chamfer 316. The first limiting part 21 is protruded on the hub spindle head 2, so that a round angle is formed between the first limiting part 21 and the outer wall of the hub spindle head 2, and when the oil seal seat ring 31 is clamped between the inner ring of the bearing 9 and the first limiting part 21, the chamfer 316 is arranged at intervals with the round angle, so that the phenomenon of stress concentration can be avoided.

The embodiment also provides a wheel rim assembly comprising the brake anti-lock braking system. The braking system of the wheel assembly does not need to be provided with a support structure for installing the speed measuring assembly 4, so that the installation space is saved, and the waste of materials is reduced.

The embodiment also provides a vehicle, wherein four wheel positions of the vehicle all comprise the wheel rim assembly. The wheel edge part of the vehicle has compact and reasonable structure, reduces material waste and reduces production cost.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims

1. A brake antilock system, comprising:

a wheel hub (1) comprising a rotary mounting portion (11) and a seal mounting portion (12) coaxially arranged;

the hub shaft head (2), the rotary mounting part (11) is rotatably sleeved on the hub shaft head (2), and an annular mounting cavity (5) is formed between the sealing mounting part (12) and the outer wall of the hub shaft head (2);

the oil seal assembly (3) is arranged on the hub shaft head (2) in a sealing manner and is positioned in the annular mounting cavity (5), the sealing mounting part (12) is rotatably sleeved on the oil seal assembly (3), and the oil seal assembly (3) is provided with a mounting through hole (311);

and the speed measuring assembly (4) penetrates through the mounting through hole (311) and stretches into the annular mounting cavity (5) to measure the rotating speed of the wheel hub (1).

2. The brake anti-lock braking system according to claim 1, further comprising a turntable (6), wherein the turntable (6) is sleeved on the hub axle head (2) at intervals and is connected with the seal installation part (12), a plurality of detection holes (61) are uniformly distributed on the turntable (6) along the circumferential direction, and when the wheel hub (1) rotates, one end of the speed measuring assembly (4) extending into the annular installation cavity (5) can be opposite to the plurality of detection holes (61) in sequence so as to acquire the rotating speed of the wheel hub (1).

3. A brake anti-lock system according to claim 2, wherein the seal mounting portion (12) comprises a stop annulus (121), the outer edge of the turntable (6) being clamped between the stop annulus (121) and the oil seal assembly (3).

4. A brake anti-lock system according to claim 1, characterized in that a bushing (7) is arranged between the inner wall of the mounting through hole (311) and the outer wall of the tachometer assembly (4).

5. A brake anti-lock brake system according to claim 4, further comprising a sealing ring (8), wherein a groove (312) is formed in the inner wall of the mounting through hole (311) in a circumferential ring, the sealing ring (8) is disposed in the groove (312) and is in sealing contact with the outer wall of the speed measuring assembly (4), and one end of the bushing (7) is abutted to the sealing ring (8).

6. A brake anti-lock brake system according to claim 1, wherein the oil seal assembly (3) comprises an oil seal seat ring (31) and an oil seal (32) sleeved on the oil seal seat ring (31), the oil seal seat ring (31) is sleeved on the hub spindle nose (2), the oil seal (32) is sealed and clamped between the outer wall of the oil seal seat ring (31) and the inner wall of the seal mounting part (12), and the mounting through hole (311) is formed in the oil seal seat ring (31).

7. A brake anti-lock system according to claim 6, further comprising a bearing (9), said rotational mounting (11) being rotatably connected to said hub axle head (2) by means of said bearing (9).

8. A brake anti-lock brake system according to claim 7, wherein the oil seal race (31) is provided with a first contact surface (313) and a second contact surface (314) on axially opposite sides respectively, the hub spindle head (2) is provided with a first limit portion (21) circumferentially and annularly, the first limit portion (21) is abutted to the first contact surface (313), and the second contact surface (314) is abutted to the inner ring of the bearing (9).

9. A wheel rim assembly comprising a brake antilock system as claimed in any one of claims 1 to 8.

10. A vehicle comprising the wheel rim assembly of claim 9.