CN112606802A

CN112606802A - Brake bottom plate assembly, wheel hub assembly, brake shoe, brake drum, dust cover, steering drive axle and vehicle

Info

Publication number: CN112606802A
Application number: CN202011501879.XA
Authority: CN
Inventors: 李晓辉; 杨峰; 刘四清; 文峻; 宋峰
Original assignee: Hunan Zoomlion Special Vehicle Co Ltd
Current assignee: Hunan Zoomlion Special Vehicle Co Ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-04-06
Anticipated expiration: 2040-12-17
Also published as: CN112606802B

Abstract

The invention relates to the technical field of steering drive and discloses a brake bottom plate assembly, a hub assembly, a brake shoe, a brake drum, a dust cover, a steering drive axle and a vehicle. The brake bottom plate assembly is used for steering drive axle, the brake bottom plate assembly includes brake bottom plate and ABS sensor, wherein, the brake bottom plate includes accommodation space in order to be used for passing through accommodation space allows the brake bottom plate suit is in the periphery of wheel hub, the brake bottom plate is used for setting up on the knuckle assembly, the ABS sensor sets up along radial direction on the brake bottom plate, and the axis of ABS sensor arranges along radial direction, the radial inner end of ABS sensor includes the electromagnetic induction head. This braking bottom plate assembly can avoid ABS sensor's transmission signal line to take place the fracture risk to avoid ABS ring gear and return spring to produce and interfere, promote the convenience of dismouting.

Description

Brake bottom plate assembly, wheel hub assembly, brake shoe, brake drum, dust cover, steering drive axle and vehicle

Technical Field

The invention relates to the technical field of steering drive, in particular to a brake bottom plate assembly, a hub assembly, a brake shoe, a brake drum, a dust cover, a steering drive axle and a vehicle.

Background

ABS sensors of vehicles are an important component of ABS systems of vehicles. When the vehicle brakes, the ABS sensor acquires the rotating speed signal of the wheel in an electromagnetic induction mode, the rotating speed signal of the wheel is sent to the controller through the conducting wire, the controller analyzes and calculates the signal and sends a control instruction to the pressure regulator according to the movement condition of the wheel, and therefore the vehicle can obtain a good braking effect.

In a steering drive axle in the prior art, an ABS sensor is fixed on a brake bottom plate, the axis of the ABS sensor is parallel to the axis of a transmission shaft, an ABS gear ring is in interference fit with a wheel hub, a brake drum and a hub reduction gear are connected and assembled with the wheel hub and a steering knuckle assembly in a bolt and spline fit mode, the brake bottom plate is fixedly connected with the steering knuckle assembly through a bolt, a brake shoe is assembled with the brake bottom plate through a return spring, and a dust cover and an expander are fixedly connected with the brake bottom plate through bolts.

In the existing steering drive axle, the following defects generally exist:

1. in the running process of the vehicle, because the high-speed rotation of the transmission shaft and the rotation of the steering knuckle assembly in the steering process can cause the transmission signal line of the ABS sensor to have a fracture risk in the driving process, the ABS signal acquisition is abnormal in the braking process, the braking deviation of the vehicle is caused, and the potential safety hazard is caused to the braking of the vehicle;

2. in the frequent braking process of a vehicle, the temperature of the ABS sensor is higher, and the high temperature causes the ABS signal transmission line of the ABS sensor to be easy to damage, so that the ABS signal transmission is abnormal, the brake system cannot work normally, and the driving safety is influenced;

3. in addition, when the axle is repaired and maintained, the ABS gear ring also interferes with the return spring, and the axle assembly is inconvenient to repair and maintain. In addition, the ABS ring gear is heavy in weight.

And 4, the head of the ABS sensor is easily attached by metal powder generated by normal abrasion of a friction plate of a brake shoe in the braking process, so that the strength of a magnetoelectric induction signal is weakened, and the normal work of the ABS sensor is influenced.

Disclosure of Invention

In a first aspect, a first object of the present invention is to provide a brake shoe assembly, which can avoid the risk of breaking the transmission signal line of the ABS sensor, avoid the interference between the ABS gear ring and the return spring, and improve the convenience of assembly and disassembly.

In order to achieve the above object, the present invention provides a brake spider assembly for a steering axle, the brake spider assembly including a brake spider and an ABS sensor, wherein the brake spider includes an accommodation space for allowing the brake spider to be fitted around an outer periphery of a wheel hub through the accommodation space, the brake spider is for being disposed on a knuckle assembly, the ABS sensor is disposed on the brake spider in a radial direction, an axis of the ABS sensor is arranged in the radial direction, and a radially inner end of the ABS sensor includes an electromagnetic induction head.

In the technical scheme, because the ABS sensor sets up on the braking bottom plate along radial direction to the axis of ABS sensor arranges along radial direction, the radial inner of ABS sensor includes the electromagnetic induction head, like this, when the braking bottom plate suit is in the periphery (outside) of wheel hub, can make the signal transmission line of ABS sensor more outwards arrange on radial direction, so that draw forth the signal transmission line of ABS sensor and arrange in the outside of the frame of knuckle assembly, effectively increased the space radial distance of signal transmission line and transmission shaft like this, even in the high-speed rotation of transmission shaft and the steering process of knuckle assembly, can prevent completely because the high-speed rotatory in-process of transmission shaft leads to the cracked risk of signal transmission line, guarantee that ABS signal transmission is reliable and stable, effectively guarantee vehicle braking safe and reliable. Simultaneously, when the brake shoe suit was in wheel hub's periphery (outside), the electromagnetic induction head will arrange more inwards in radial direction, thus, can reduce the external diameter of wheel hub's ABS ring gear setting section correspondingly, thereby make the external diameter of setting up the ABS ring gear on the ABS ring gear setting section reduce, because the external diameter of ABS ring gear reduces, can avoid the return elastic component that the brake shoe is connected to take place to interfere with the ABS ring gear at dismouting in-process, promote the assembly manufacturability of steering drive axle, be convenient for the maintenance of steering drive axle, and reduce the material cost of ABS ring gear, be favorable to lightweight design.

Further, the signal transmission line of the ABS sensor axially extends from the radially outer end of the ABS sensor.

In addition, the brake bottom plate assembly comprises an elastic clamping sleeve and a mounting bracket, wherein the mounting bracket is arranged on the brake bottom plate, the elastic clamping sleeve is assembled in an assembling hole of the mounting bracket, and the ABS sensor is assembled in the elastic clamping sleeve.

In a second aspect, a second object of the present invention is to provide a hub assembly, the hub assembly being used for a steering drive axle, the hub assembly including a hub and an ABS gear ring, wherein the hub includes an ABS gear ring installation section, the ABS gear ring installation section being used for being located in an accommodation space of a brake shoe of the brake shoe assembly according to any of the above first aspects, wherein the ABS gear ring is installed on an outer peripheral surface of the ABS gear ring installation section, and a radial tooth for facing an electromagnetic induction head of an ABS sensor of the brake shoe assembly according to any of the above first aspects in a radial direction is formed on the outer peripheral surface of the ABS gear ring.

Like this, as in the first aspect above, because the electromagnetic induction head will be arranged more inwards in radial direction, like this, can reduce the external diameter of wheel hub's ABS ring gear setting section correspondingly, thereby make the external diameter of the ABS ring gear that sets up on ABS ring gear setting section reduce, because the external diameter of ABS ring gear reduces, can avoid the return elastic component that the brake shoe is connected to take place to interfere with the ABS ring gear at dismouting in-process, promote the assembly manufacturability of steering drive axle, be convenient for the maintenance of steering drive axle, and reduce the material cost of ABS ring gear, be favorable to lightweight design.

Further, the ABS gear ring and the ABS gear ring setting section are integrally formed.

In a third aspect, a third object of the present invention is to provide a brake shoe for a steering transaxle, the brake shoe being adapted to be disposed on an outer periphery of a brake spider of the brake spider assembly as described in any of the above first aspects, wherein the brake shoe is formed with a brake shoe radial direction adjustment through hole for opposing in a radial direction an ABS sensor of the brake spider assembly as described in any of the above first aspects.

Thus, since the brake shoe is formed with the brake-shoe radial direction adjustment through hole for the ABS sensor of the backing plate assembly described in any of the above first aspects in the radial direction, so that the brake shoe is in actual use, the brake drum described in any of the following fourth aspects is rotatably provided radially outward of the brake shoe, and the brake-drum radial direction adjustment through hole can be opposed to the brake-shoe radial direction adjustment through hole in the radial direction, as described in the above first aspect, since the ABS sensor is provided on the backing plate in the radial direction and the axis of the ABS sensor is arranged in the radial direction, so that the radially outer end of the ABS sensor can be arranged further outward in the radial direction, heat generated during braking can be quickly radiated outward from the radially aligned brake-drum radial direction adjustment through hole and brake-shoe radial direction adjustment through hole, reducing the braking temperature, therefore, the risk that the signal transmission line melts in a high-temperature environment can be prevented, ABS signal transmission is normal, and safe and reliable driving braking is facilitated.

In a fourth aspect, a fourth object of the present invention is to provide a brake drum for a steering axle, the brake drum being adapted to be rotatably disposed radially outward of the brake shoe described in the above third aspect, wherein the brake drum forms a brake drum radial adjustment through hole that is adapted to be opposed in a radial direction to the brake shoe radial adjustment through hole of the brake shoe described in the above third aspect.

In this way, since the brake drum forms the brake drum radial direction adjustment through hole which can be used to oppose in the radial direction the brake shoe radial direction adjustment through hole of the brake shoe described in the above third aspect, so that, in actual use, the brake drum is rotatably provided radially outward of the brake shoe, and the brake drum radial direction adjustment through hole can oppose in the radial direction the brake shoe radial direction adjustment through hole, as described in the above first aspect, since the ABS sensor is provided on the backing plate in the radial direction, and the axis of the ABS sensor is arranged in the radial direction, so that the radially outer end of the ABS sensor can be arranged further outward in the radial direction, heat generated during braking can be quickly radiated outward from the radially aligned brake drum radial direction adjustment through hole and brake shoe radial direction adjustment through hole, the braking temperature can be lowered, and the risk of the signal transmission line melting in a high temperature environment can be prevented, the ABS signal transmission is normal, and the safe and reliable running brake is facilitated. Meanwhile, in the braking process, metal powder generated by normal abrasion of a friction plate of the brake shoe can be discharged to the outside through the radial adjusting through hole of the brake drum, so that the metal powder is prevented from being adsorbed on an electromagnetic induction head of the ABS sensor, the cleanliness of the electromagnetic induction head of the ABS sensor can be ensured, and an electromagnetic induction signal is normal.

Further, the brake drum radial direction adjustment through holes are plural in number and arranged circumferentially at intervals, wherein each of the brake drum radial direction adjustment through holes is usable to oppose in a radial direction the brake shoe radial direction adjustment through hole of the brake shoe described in the above third aspect.

Further, an air flow guide groove communicated with the brake drum radial direction adjusting through hole is formed on the outer circumferential surface of the brake drum.

Further, a width of a communication end portion of the air flow guide groove communicating with the brake drum radial direction adjustment through hole is larger than a diameter of the brake drum radial direction adjustment through hole such that the width of the communication end portion extends beyond both radial sides of the brake drum radial direction adjustment through hole.

Further, the air flow guide groove is obliquely arranged.

Further, the air flow guide groove is plural, and one of the brake drum radial direction regulation through holes communicates with one of the air flow guide grooves.

Further, a plurality of the air flow guide grooves are arranged obliquely at the same inclination rate and in the same inclination direction.

Further, the edge of the radial inner side orifice of the brake drum radial adjusting through hole is an outer convex arc edge.

In a fifth aspect, a fifth object of the present invention is to provide a dust cover, where the dust cover is used for a steering drive axle, the dust cover is used for being sleeved on a steering knuckle assembly, the dust cover is used for enclosing an internal cavity for an ABS sensor to extend into with a brake baseplate of a brake baseplate assembly as described in any of the above first aspects and a brake drum as described in any of the above fourth aspects, an axial through hole is formed in the dust cover and is used for being located outside a frame of the steering knuckle assembly, and the axial through hole is used for allowing a signal transmission line of the ABS sensor of the brake baseplate assembly as described in any of the above first aspects to pass through so that the signal transmission line is arranged outside the frame of the steering knuckle assembly.

Like this, through this axial through hole, can effectively increase the radial distance in space of signal transmission line and transmission shaft, like this, even at the high-speed rotation of transmission shaft and the steering process of knuckle assembly, can prevent completely because the high-speed rotatory in-process of transmission shaft leads to the cracked risk of signal transmission line, guarantee ABS signal transmission reliable and stable, effectively guarantee vehicle braking safe and reliable.

In a sixth aspect, a sixth object of the present invention is to provide a steer-drive axle, comprising a brake spider assembly, a knuckle assembly, a hub assembly, brake shoes, a brake drum and a dust cover, wherein the brake spider assembly comprises a brake spider and an ABS sensor, and the brake spider and the dust cover are disposed on a frame of the knuckle assembly; the hub assembly comprises a hub and an ABS gear ring, the brake bottom plate assembly is arranged on the radial outer portion of the hub, the ABS sensor is opposite to the ABS gear ring, and the brake shoe is assembled with the brake bottom plate through a return elastic part; the brake drum is sleeved on the radial outer part of the brake shoe, and the wheel hub and the brake drum are respectively in power transmission connection with a power part of the steering knuckle assembly; the brake drum, the brake bottom plate and the dust cover enclose to form an inner cavity, the ABS sensor extends into the inner cavity, and a signal transmission line of the ABS sensor extends out of the inner cavity to the outside and is located outside a frame of the steering knuckle assembly.

In the technical scheme, an inner cavity is defined by the brake drum, the brake bottom plate and the dust cover, the ABS sensor extends into the inner cavity, and a signal transmission line of the ABS sensor extends out of the inner cavity and is positioned outside a frame of the steering knuckle assembly, so that the spatial radial distance between the signal transmission line and the transmission shaft can be effectively increased, and the risk of signal transmission line breakage caused by the high-speed rotation process of the transmission shaft can be completely prevented even in the high-speed rotation process of the transmission shaft and the steering process of the steering knuckle assembly, thereby ensuring the reliable and stable transmission of ABS signals and effectively ensuring the safe and reliable braking of a vehicle.

Furthermore, a through hole is formed on the cavity wall of the inner cavity.

Further, the brake spider assembly is the brake spider assembly of any of the above first aspects, the hub assembly is the hub assembly of any of the above second aspects, the brake shoe is the brake shoe of the above third aspects, the brake drum is the brake drum of any of the above fourth aspects, and the dust cover is the dust cover of the above fifth aspects, wherein the radial tooth of the ABS ring gear is opposed to the ABS sensor in a radial direction, the brake shoe radial direction adjustment through hole is opposed to the ABS sensor in a radial direction, the brake drum radial direction adjustment through hole is opposed to the brake shoe radial direction adjustment through hole in a radial direction, and wherein a signal transmission line of the ABS sensor passes through the axial through hole and is located outside a frame of the knuckle assembly.

In a seventh aspect, the present invention provides a seventh object to provide a vehicle provided with the steer-drive axle of any of the above sixth aspects.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a cross-sectional structural view of a partial structure of a steering drive axle according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view A-A of FIG. 1;

FIG. 3 is an enlarged view of a portion of the structure of FIG. 1;

fig. 4 is a schematic half-section view of the brake drum of fig. 1.

Description of the reference numerals

1-a brake bottom plate, 2-an ABS sensor, 3-a wheel hub, 4-a steering knuckle assembly, 5-a signal transmission line, 6-a radial outer end, 7-an elastic clamping sleeve, 8-a mounting bracket, 9-an ABS gear ring, 10-an ABS gear ring setting section, 11-radial teeth, 12-a brake shoe, 13-a brake shoe radial adjusting through hole, 14-a brake drum, 15-a brake drum radial adjusting through hole, 16-an air flow guide groove, 17-a communicating end part, 18-an outer convex arc edge, 19-a dust cover, 20-an inner cavity, 21-a frame, 22-an axial through hole, 23-a return elastic element, 24-a transmission shaft, 25-a wheel edge reducer and 26-an expander.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In a first aspect, referring to fig. 1, 2 and 3, the invention provides a brake spider assembly for a steering axle, the brake spider assembly comprising a brake spider 1 and an ABS sensor 2, wherein the brake spider 1 comprises an accommodation space for allowing the brake spider 1 to be fitted around the outer periphery of a hub 3 through the accommodation space, the brake spider 1 is for being disposed on a knuckle assembly 4, the ABS sensor 2 is disposed on the brake spider 1 in a radial direction, and an axis of the ABS sensor 2 is arranged in the radial direction, and a radially inner end of the ABS sensor 2 includes an electromagnetic induction head.

Because the ABS sensor sets up on the braking bottom plate along radial direction, and the axis of ABS sensor arranges along radial direction, the radial inner of ABS sensor includes the electromagnetic induction head, thus, when the braking bottom plate suit is outside at wheel hub's periphery, can make the signal transmission line of ABS sensor more outwards arrange in radial direction, so that draw forth the signal transmission line of ABS sensor and arrange the outside at the frame of knuckle assembly, the space radial distance of signal transmission line and transmission shaft has effectively been increased like this, even in the high-speed rotation of transmission shaft and the steering process of knuckle assembly, can prevent completely because the high-speed rotatory in-process of transmission shaft leads to the cracked risk of signal transmission line, guarantee ABS signal transmission is reliable stable, effectively guarantee vehicle braking safe and reliable. Simultaneously, when the brake bottom plate suit was outside at wheel hub's periphery, the electromagnetic induction head will be arranged more inwards in radial direction, thus, can reduce the external diameter of wheel hub's ABS ring gear setting section correspondingly, thereby make the external diameter of the ABS ring gear that sets up on ABS ring gear setting section reduce, because the external diameter of ABS ring gear reduces, can avoid the return elastic component that the brake shoe is connected to take place to interfere with the ABS ring gear at dismouting in-process, promote the assembly manufacturability of steering drive axle, be convenient for steering drive axle's maintenance, and reduce the material cost of ABS ring gear, be favorable to lightweight design.

In this brake spider assembly, the signal transmission line 5 of the ABS sensor 2 may axially project in a radial direction from any position between the middle and the radially outer end 6 of the ABS sensor 2. For example, in one embodiment, to facilitate the signal transmission line 5 extending axially straight and then directly outside the frame of the knuckle assembly, referring to FIG. 3, the signal transmission line 5 of the ABS sensor 2 extends axially from the radially outer end 6 of the ABS sensor 2. Thus, the signal transmission line 5 axially extends straight from the radially outer end 6 of the ABS sensor 2 and axially extends straight out of the dust cover 19 and directly outside the frame 21 of the knuckle assembly 4, so that the radial distance between the signal transmission line and the transmission shaft can be further increased.

Of course, in this brake spider assembly, in one embodiment, the ABS sensor 2 may be directly disposed on the brake spider 1, for example, a strip-shaped ABS sensor 2 is directly radially inserted into a radial insertion hole on the rotating spider 1. Alternatively, referring to fig. 2 and 3, in another embodiment, the brake shoe assembly includes an elastic clamping sleeve 7 and a mounting bracket 8, wherein the mounting bracket 8 is disposed on the brake shoe 1, for example, by being clamped or screwed or welded, the elastic clamping sleeve 7 is assembled in an assembling hole of the mounting bracket 8, the ABS sensor 2 is assembled in the elastic clamping sleeve 7, and the elastic clamping sleeve 7 can absorb vibration during braking, thereby improving the protection performance of the ABS sensor 2. In addition, the elastic clamping sleeve 7 can keep the ABS sensor 2 in a stable and reliable positioning when the ABS sensor 2 is adjusted to any desired installation position in the radial direction.

In a second aspect, the present invention provides a hub assembly, referring to fig. 1, 2 and 3, for a steering drive axle, the hub assembly comprising a hub 3 and an ABS ring gear 9, wherein the hub 3 comprises an ABS ring gear setting section 10, the ABS ring gear setting section 10 is used to be located in a receiving space of a brake base plate 1 of the brake base plate assembly described in any of the above first aspects, wherein the ABS ring gear 9 is provided on an outer peripheral surface of the ABS ring gear setting section 10, and radial teeth 11 for opposing radial directions of electromagnetic induction heads of the ABS sensors 2 of the brake base plate assembly described in any of the above first aspects are formed on the outer peripheral surface of the ABS ring gear 9.

In addition, in the hub assembly, the hub 3 and the ABS ring gear 9 may be separate components, for example, the ABS ring gear 9 may be shrink-fitted on the ABS ring gear setting section 10. Alternatively, the ABS ring gear 9 and the ABS ring gear installation section 10 may be integrally formed, and for example, the radial teeth 11 may be inserted on the outer peripheral surface of the ABS ring gear installation section 10.

In a third aspect, the present invention provides a brake shoe, and referring to fig. 1, 2 and 3, the brake shoe 12 is for a steering axle, the brake shoe 12 is for being disposed on an outer periphery of a brake spider 1 of a brake spider assembly as described in any of the above first aspects, wherein the brake shoe 12 is formed with a brake shoe radial direction adjustment through hole 13 for opposing the ABS sensor 2 of the brake spider assembly as described in any of the above first aspects in a radial direction.

Thus, since the brake shoe is formed with the brake-shoe radial direction adjustment through hole for the ABS sensor of the backing plate assembly described in any of the above first aspects in the radial direction, so that the brake shoe is in actual use, the brake drum described in any of the following fourth aspects is rotatably provided radially outward of the brake shoe, and the brake-drum radial direction adjustment through hole can be opposed to the brake-shoe radial direction adjustment through hole in the radial direction, as described in the above first aspect, since the ABS sensor is provided on the backing plate in the radial direction and the axis of the ABS sensor is arranged in the radial direction, so that the radially outer end of the ABS sensor can be arranged further outward in the radial direction, heat generated during braking can be quickly radiated outward from the radially aligned brake-drum radial direction adjustment through hole and brake-shoe radial direction adjustment through hole, reducing the braking temperature, therefore, the risk that the signal transmission line melts in a high-temperature environment can be prevented, ABS signal transmission is normal, and safe and reliable driving braking is facilitated. In addition, when the radial adjusting through holes of the brake drum and the brake shoe are aligned in the radial direction, the radial clearance between the ABS sensor and the ABS gear ring can be adjusted through the radial adjusting through holes of the brake drum and the brake shoe which are aligned in the radial direction.

In addition, the brake shoe radial adjustment through hole 13 may be a circular through hole, or may be a square or other shaped through hole.

In a fourth aspect, the present invention provides a brake drum, and referring to fig. 1, 2, 3 and 4, the brake drum 14 is for a steer-axle, the brake drum 14 is for being rotatably disposed radially outwardly of the brake shoe 12 described above in relation to the third aspect, wherein the brake drum 14 defines a brake drum radial adjustment through hole 15, and the brake drum radial adjustment through hole 15 is operable to be diametrically opposed to the brake shoe radial adjustment through hole 13 of the brake shoe 12 described above in relation to the third aspect. That is, since the brake drum is rotated in actual use, the brake drum radial adjustment through hole 15 can be misaligned and aligned with the brake shoe radial adjustment through hole 13.

In this way, since the brake drum forms the brake drum radial direction adjustment through hole which can be used to oppose in the radial direction the brake shoe radial direction adjustment through hole of the brake shoe described in the above third aspect, so that, in actual use, the brake drum is rotatably provided radially outward of the brake shoe, and the brake drum radial direction adjustment through hole can oppose in the radial direction the brake shoe radial direction adjustment through hole, as in the above first aspect, since the ABS sensor is provided on the backing plate in the radial direction, and the axis of the ABS sensor is arranged in the radial direction, so that the radially outer end of the ABS sensor can be arranged further outward in the radial direction, heat generated during braking can be quickly radiated outward from the brake drum radial direction adjustment through hole 15, while also being radiated outward from the brake drum radial direction adjustment through hole and the brake shoe radial direction adjustment through hole which are aligned radially, the brake temperature is reduced, so that the risk that the signal transmission line melts in a high-temperature environment can be prevented, the ABS signal transmission is normal, and the safe and reliable running brake is facilitated. Meanwhile, the brake shoe can move in the radial direction to be in contact with the brake drum for braking or be separated from the brake drum for braking, so that metal powder generated by normal abrasion of a friction plate of the brake shoe can be discharged to the outside through the radial adjusting through hole of the brake drum in the braking process, the metal powder is prevented from being adsorbed on an electromagnetic induction head of the ABS sensor, the cleanliness of the electromagnetic induction head of the ABS sensor can be ensured, and electromagnetic induction signals are normal. In addition, when the radial adjusting through holes of the brake drum and the brake shoe are aligned in the radial direction, the radial clearance between the ABS sensor and the ABS gear ring can be adjusted through the radial adjusting through holes of the brake drum and the brake shoe which are aligned in the radial direction.

In addition, the brake drum radial direction adjustment through hole 15 may be a circular through hole, or may be a square or other shaped through hole.

In addition, the number of the brake drum radial direction adjustment through holes 15 may be one. Alternatively, referring to fig. 4, the brake drum radial direction adjustment through holes 15 are plural in number and circumferentially spaced, wherein each brake drum radial direction adjustment through hole 15 can be used to oppose the brake shoe radial direction adjustment through hole 13 of the brake shoe 12 described in the above third aspect in the radial direction when the brake drum is rotated. In this way, the plurality of brake drum radial direction adjustment through holes 15 arranged at intervals in the circumferential direction can further enhance the heat dissipation effect.

In addition, referring to fig. 3 and 4, in order to further improve the heat dissipation effect, in one embodiment, an air flow guide groove 16 communicating with the brake drum radial direction adjustment through hole 15 is formed on the outer circumferential surface of the brake drum 14. Like this, the air flow guide way 16 on the outer peripheral face of brake drum 14 can increase the air flow, and in braking process, this is favorable to the air to flow in the inside cavity that brake drum, brake bottom plate and dust cover surround, can effectively dissipate the heat that produces in the braking process, reduces brake temperature, further prevents that signal transmission line from producing the risk of melting in high temperature environment, makes ABS signal transmission normal, is favorable to service brake safe and reliable.

Of course, the number of the air flow guide grooves 16 may be one, or may be plural. For example, one air flow guide groove 16 may communicate with one air flow guide groove 16, or one air flow guide groove 16 may communicate with a plurality of air flow guide grooves 16. Alternatively, a plurality of air flow guide grooves 16 may communicate with one air flow guide groove 16, or a plurality of air flow guide grooves 16 may communicate with a plurality of air flow guide grooves 16, respectively. For example, in one embodiment, the air flow guide groove 16 is plural, and one brake drum radial direction adjustment through hole 15 communicates with one air flow guide groove 16, which can further enhance the heat dissipation effect with reference to fig. 4.

In addition, the width of the air flow guide groove 16 may be selected according to actual requirements, for example, the width of the air flow guide groove 16 may be the same as the diameter of the brake drum radial direction adjustment through hole 15. Alternatively, referring to fig. 4, the width of the communication end portion 17 of the air flow guide groove 16 communicating with the brake drum radial direction adjustment through hole 15 is larger than the diameter of the brake drum radial direction adjustment through hole 15 such that the width of the communication end portion 17 extends beyond both radial sides of the brake drum radial direction adjustment through hole 15. Thus, when the brake drum rotates, it is possible to more easily guide heat from the brake drum radial direction adjustment through holes 15 into the air flow guide grooves 16 to be discharged outward.

In addition, the air flow guide grooves 16 may be arranged axially straight. Alternatively, in consideration of the rotation of the brake drum, in one embodiment, referring to fig. 4, the air flow guide grooves 16 are arranged obliquely, so that the hot air generated by braking can be further guided to flow along the air flow guide grooves 16 to dissipate heat when the brake drum rotates.

In addition, the inclination direction and the inclination rate of the plurality of air flow guide grooves 16 may be different, or, referring to fig. 4, the plurality of air flow guide grooves 16 are arranged obliquely at the same inclination rate and the same inclination direction. Like this, when promoting the radiating effect, change in the machine-shaping.

In addition, referring to fig. 4, the radially inner orifice edge of the brake drum radial regulation through hole 15 is an outer convex circular arc edge 18. Therefore, during braking, the outer peripheral surface of the brake shoe and the convex arc edge 18 can be in a smooth process, and the friction plate of the brake shoe is prevented from being partially and slightly damaged due to scraping.

In a fifth aspect, the present invention provides a dust cover 19, referring to fig. 1 and 3, the dust cover 19 is used for a steering drive axle, the dust cover 19 is used for being sleeved on a steering knuckle assembly 4, the dust cover 19 is used for enclosing an internal cavity 20 for allowing the ABS sensor 2 to extend into with the brake spider 1 of the brake spider assembly as described in any of the above first aspects and the brake drum 14 as described in any of the above fourth aspects, an axial through hole 22 is formed on the dust cover 19 for allowing the signal transmission line 5 of the ABS sensor 2 of the brake spider assembly as described in any of the above first aspects to pass through so that the signal transmission line 5 is arranged outside the frame 21 of the steering knuckle assembly 4.

In a sixth aspect, the present invention provides a steer-drive axle, referring to fig. 1, 2 and 3, comprising a brake spider assembly, a knuckle assembly 4, a wheel hub assembly, brake shoes 12, a brake drum 14 and a dust cover 19, wherein the brake spider assembly comprises a brake spider 1 and ABS sensors 2, the brake spider 1 and dust cover 19 are disposed on a frame 21 of the knuckle assembly 4; the hub assembly comprises a hub 3 and an ABS gear ring 9, the brake bottom plate assembly is arranged at the radial outer part of the hub 3, the ABS sensor 2 is opposite to the ABS gear ring 9, and the brake shoe 12 is assembled with the brake bottom plate 1 through a return elastic part 23; the brake drum 14 is sleeved on the radial outer part of the brake shoe 12, and the wheel hub 3 and the brake drum 14 are respectively in power transmission connection with a power part of the steering knuckle assembly 4; the brake drum 14, the brake base plate 1 and the dust cover 19 enclose an inner cavity 20, the ABS sensor 2 extends into the inner cavity 20, and the signal transmission line 5 of the ABS sensor 2 extends out of the inner cavity 20 and is located outside the frame 21 of the knuckle assembly 4.

In the technical scheme, because the brake drum, brake bottom plate and dust cover enclose into there is the inside cavity, the ABS sensor stretches into in the inside cavity, the signal transmission line of ABS sensor stretches out the outside and lies in the outside of the frame of knuckle assembly from the inside cavity, thus, the space radial distance of signal transmission line and transmission shaft has effectively been increased, like this, even in the high-speed rotation of transmission shaft and the steering process of knuckle assembly, can prevent completely because the high-speed rotatory in-process of transmission shaft leads to the cracked risk of signal transmission line, guarantee ABS signal transmission reliable and stable, effectively guarantee vehicle braking safe and reliable.

In this steer-drive axle, the ABS sensor 2 may be arranged axially, or may be arranged obliquely, or may be arranged radially, as long as the signal transmission line 5 of the ABS sensor 2 is allowed to protrude to the outside from the inner cavity 20 and is located outside the frame 21 of the knuckle assembly 4.

In addition, a through hole is formed in the wall of the internal cavity 20. The through hole discharges the brake heat accumulated in the inner cavity in the braking process, and reduces the brake temperature, so that the risk of melting the signal transmission line in a high-temperature environment can be prevented, the ABS signal transmission is normal, and the safety and reliability of the service brake are facilitated.

In one embodiment, the through-hole may be formed on the dust cap. Alternatively, in another embodiment, the through-hole is formed by any of the above-described brake drum radial direction adjustment through-holes 15, or by the above-described brake shoe radial direction adjustment through-hole 13 and brake drum radial direction adjustment through-hole 15 that are capable of radial alignment.

In addition, the brake spider assembly, the knuckle assembly 4, the hub assembly, the brake shoes 12, the brake drum 14 and the dust cover 19 may have various structural forms, but it should be noted that, whatever the structural form, the signal transmission line 5 of the ABS sensor 2 may be extended from the internal cavity 20 to the outside and located outside the frame 21 of the knuckle assembly 4.

For example, in one embodiment, and with reference to FIGS. 1, 2, 3 and 4, the brake spider assembly is any of the brake spider assemblies described above in the first aspect, the hub assembly is any of the brake spider assemblies described above in the second aspect, the brake shoes 12 are the brake shoes 12 described above in the third aspect, the brake drums 14 are the brake drums 14 described above in the fourth aspect, and the dust cover 19 is the dust cover 19 described above in the fifth aspect, wherein, the radial tooth 11 of the ABS gear ring 9 is opposite to the ABS sensor 2 in the radial direction, the brake shoe radial adjusting through hole 13 is opposite to the ABS sensor 2 in the radial direction, when the brake drum rotates, the brake drum radial direction adjustment through hole 15 and the brake shoe radial direction adjustment through hole 13 can be opposed in the radial direction, the signal transmission line 5 of the ABS sensor 2 is led out from the axial through hole 22 and is located outside the frame 21 of the knuckle assembly 4.

In this way, the spreader 26 can be arranged on the brake spider, the brake shoes can be moved radially outwards by the spreader 26 to brake in contact with the brake drum, and after braking is complete, the brake shoes can be returned to disengage from the brake drum by the return resilient member 23, for example a return spring. The hub 3 and the brake drum 14 may be connected to a power unit of the knuckle assembly 4, such as a transmission shaft 24, via a hub reduction gear 25, such that rotation of the transmission shaft 24 causes rotation of the hub 3 and the brake drum 14 via the hub reduction gear 25.

In a seventh aspect, the present invention provides a vehicle provided with the steer-drive axle as recited in any of the above sixth aspects.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. The utility model provides a brake bottom plate assembly, its characterized in that, brake bottom plate assembly is used for steering drive axle, brake bottom plate assembly includes brake bottom plate (1) and ABS sensor (2), wherein, brake bottom plate (1) includes accommodation space for passing through accommodation space allows brake bottom plate (1) suit is in the periphery of wheel hub (3), brake bottom plate (1) is used for setting up on knuckle assembly (4), ABS sensor (2) set up along radial direction on brake bottom plate (1), and the axis of ABS sensor (2) arranges along radial direction, the radial inner of ABS sensor (2) includes the electromagnetic induction head.

2. Brake spider assembly according to claim 1, wherein the signal transmission line (5) of the ABS sensor (2) axially projects from a radially outer end (6) of the ABS sensor (2).

3. The brake spider assembly of claim 1 or 2, comprising a resilient clamping sleeve (7) and a mounting bracket (8), wherein the mounting bracket (8) is arranged on the brake spider (1), the resilient clamping sleeve (7) is fitted in a fitting hole of the mounting bracket (8), and the ABS sensor (2) is fitted in the resilient clamping sleeve (7).

4.A hub assembly, characterized in that, the hub assembly is used for a steering drive axle, the hub assembly comprises a hub (3) and an ABS gear ring (9), wherein, the hub (3) comprises an ABS gear ring setting section (10), the ABS gear ring setting section (10) is used for being located in the accommodating space of the brake base plate (1) of the brake base plate assembly according to any one of claims 1 to 3, wherein, the ABS gear ring (9) is arranged on the outer peripheral surface of the ABS gear ring setting section (10), and radial teeth (11) for being opposite to the electromagnetic induction head of the ABS sensor (2) of the brake base plate assembly according to any one of claims 1 to 3 in the radial direction are formed on the outer peripheral surface of the ABS gear ring (9).

5. A hub assembly according to claim 4, wherein the ABS ring gear (9) and the ABS ring gear seating section (10) are integrally formed.

6. A brake shoe, characterized in that the brake shoe (12) is for a steering axle, the brake shoe (12) being intended to be arranged at the outer periphery of a brake spider (1) of a brake spider assembly according to any one of claims 1-3, wherein the brake shoe (12) is formed with a brake shoe radial adjustment through hole (13) intended to be diametrically opposed to the ABS sensor (2) of the brake spider assembly according to any one of claims 1-3.

7. A brake drum, characterized in that the brake drum (14) is intended for a steering axle, the brake drum (14) being intended to be rotatably arranged radially outside the brake shoe (12) of claim 6, wherein the brake drum (14) forms a brake drum radial adjustment through hole (15), the brake drum radial adjustment through hole (15) being intended for being diametrically opposite the brake shoe radial adjustment through hole (13) of the brake shoe (12) of claim 6.

8. A brake drum according to claim 7, characterized in that the brake drum radial adjustment through holes (15) are plural in number and circumferentially spaced, wherein each brake drum radial adjustment through hole (15) is usable to oppose in a radial direction the brake shoe radial adjustment through hole (13) of the brake shoe (12) of claim 6.

9. A brake drum according to claim 7 or 8, characterized in that the brake drum (14) is formed on its outer circumferential surface with air flow guide grooves (16) communicating with the brake drum radial adjustment through holes (15).

10. A brake drum according to claim 9, characterized in that the width of the communication end (17) of the air flow guide groove (16) communicating with the brake drum radial adjustment through hole (15) is larger than the diameter of the brake drum radial adjustment through hole (15) so that the width of the communication end (17) extends beyond both radial sides of the brake drum radial adjustment through hole (15).

11. A brake drum according to claim 9, characterized in that the air flow guide grooves (16) are arranged obliquely.

12. A brake drum according to claim 9, characterized in that the air flow guide groove (16) is plural, and one of the brake drum radial direction adjustment through holes (15) communicates with one of the air flow guide grooves (16).

13. A brake drum according to claim 12, characterized in that a plurality of the air flow guide grooves (16) are arranged obliquely at the same inclination rate and in the same inclination direction.

14. A brake drum according to claim 7, characterized in that the radially inner aperture edge of the brake drum radial adjustment through hole (15) is an outwardly convex circular arc edge (18).

15. A dust cover, characterized in that the dust cover (19) is for a steer-drive axle, the dust cover (19) is used for being arranged on the steering knuckle assembly (4) in a sleeved mode, the dust cover (19) is used for enclosing an inner cavity (20) for the ABS sensor (2) to extend into with the brake base plate (1) of the brake base plate assembly according to any one of claims 1 to 3 and the brake drum (14) according to any one of claims 7 to 14, the dust cover (19) is formed with an axial through hole (22) for being located outside a frame (21) of the knuckle assembly (4), the axial through hole (22) is used for allowing the signal transmission line (5) of the ABS sensor (2) of the brake shoe assembly of any one of claims 1-3 to pass through, so that the signal transmission line (5) is arranged outside the frame (21) of the steering knuckle assembly (4).

16. A steering drive axle is characterized by comprising a brake bottom plate assembly, a steering knuckle assembly (4), a wheel hub assembly, a brake shoe (12), a brake drum (14) and a dust cover (19), wherein,

the brake bottom plate assembly comprises a brake bottom plate (1) and an ABS sensor (2), and the brake bottom plate (1) and the dust cover (19) are arranged on a frame (21) of the steering knuckle assembly (4);

the hub assembly comprises a hub (3) and an ABS (anti-lock brake system) gear ring (9), the brake bottom plate assembly is arranged on the radial outer portion of the hub (3), the ABS sensor (2) is opposite to the ABS gear ring (9), and the brake shoe (12) is assembled with the brake bottom plate (1) through a return elastic piece (23);

the brake drum (14) is sleeved on the radial outer part of the brake shoe (12), and the hub (3) and the brake drum (14) are in power transmission connection with a power part of the steering knuckle assembly (4) respectively;

the brake drum (14), the brake bottom plate (1) and the dust cover (19) are enclosed to form an inner cavity (20), the ABS sensor (2) extends into the inner cavity (20), and a signal transmission line (5) of the ABS sensor (2) extends out of the inner cavity (20) to the outside and is located outside a frame (21) of the steering knuckle assembly (4).

17. Steering axle according to claim 16, characterized in that the wall of the inner cavity (20) is formed with a through-going hole.

18. The steer-drive axle according to claim 16 or 17, wherein said brake spider assembly is according to any one of claims 1-3, said hub assembly is according to claim 4 or 5, said brake shoes (12) are brake shoes (12) according to claim 6, said brake drum (14) is a brake drum (14) according to any one of claims 7-14, said dust cover (19) is a dust cover (19) according to claim 15, wherein said radial teeth (11) of said ABS ring gear (9) are diametrically opposed to said ABS sensor (2), said brake shoe radial adjustment through hole (13) and said ABS sensor (2) are diametrically opposed, said brake drum radial adjustment through hole (15) and said brake shoe radial adjustment through hole (13) are diametrically opposed, the signal transmission line (5) of the ABS sensor (2) penetrates out of the axial through hole (22) and is located outside a frame (21) of the steering knuckle assembly (4).

19. A vehicle, characterized in that it is provided with a steer-drive axle according to any one of claims 16-18.