CN115247681A

CN115247681A - Transmission device of full-disc brake and full-disc brake

Info

Publication number: CN115247681A
Application number: CN202110852903.2A
Authority: CN
Inventors: 张云科; 张永杰; 李瑞栋; 郭海广; 其他发明人请求不公开姓名
Original assignee: Hebei Exxon Power Technology Co ltd
Current assignee: Hebei Exxon Power Technology Co ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2022-10-28

Abstract

The invention provides a transmission device of an all-disc brake and the all-disc brake, wherein the transmission device comprises a case shell and a linear conversion mechanism in the case shell, and the linear conversion mechanism comprises a ramp gear and a push rod; the box shell comprises an inner annular wall, an outer annular wall and a side wall, wherein the side wall connects the inner annular wall with the outer annular wall; the ramp gear is arranged in a space enclosed between the inner ring wall and the outer ring wall of the box shell, and the peripheral surface of the ramp gear is provided with a plurality of ramps which are spirally arranged; the push rod is arranged between the peripheral surface of the ramp gear and the outer annular wall of the box shell, the push rod comprises a main push rod, a bearing and a side limiting roller, the bearing is arranged at the bottom of the main push rod, the side limiting roller is arranged on one side of the main push rod, and the bearing of the push rod is arranged on the ramp of the ramp gear so as to convert the circular motion of the ramp gear into the linear motion of the push rod; the inner peripheral surface of the outer annular wall of the cabinet has a plurality of grooves, and the side restricting rollers of the push rods are arranged to be located in the grooves, and the outer peripheral surfaces of the side restricting rollers are tightly fitted to the side surfaces of the grooves.

Description

Transmission device of all-disc brake and all-disc brake

Technical Field

The invention relates to the field of vehicle brakes, in particular to a transmission device of an all-disc brake and the all-disc brake.

Background

The automobile brake is a braking device of an automobile, and the brakes used by the automobile are almost all of friction type and can be divided into two types, namely a drum type brake and a disc type brake. The rotary element in the drum brake friction pair is a brake drum, and the working surface of the rotary element is a cylindrical surface; the rotating element of the disc brake is then a rotating brake disc, with the end face being the working surface. The disc brake also uses air pressure or hydraulic pressure as a power source, and the main parts include a brake disc, an air chamber mechanism or a hydraulic mechanism, a brake caliper, a friction plate and the like. The rotating element in a disc brake is a metal disc, called a brake disc, which works with end faces. The brake disc is made of cast iron or alloy steel and is fixed to the wheel, and the friction elements clamp the brake disc from both sides to brake as the wheel rotates. Disc brakes can be broadly divided into caliper disc and full disc types.

The disc brake in the prior art brakes crudely, the brake disc is a rotating part of the brake and can slide back and forth on the spline shaft, and when the brake is used, the friction plate can stop a vehicle in a very short time, so that the whole brake is not smooth. In addition, the transmission device of the brake often bears various forces, such as pressure, bending moment or torque, and the like, and the braking process is not stable.

Disclosure of Invention

In view of the above, embodiments of the present invention provide a transmission device of an all-disc brake and an all-disc brake, so as to obviate or mitigate one or more of the disadvantages in the prior art.

The technical scheme of the invention is as follows:

according to an aspect of the present invention, there is provided a transmission of an all-disc brake, the transmission comprising a housing and a linear translation mechanism within the housing, the linear translation mechanism comprising a ramp gear and a push rod; the box shell is of an annular structure and comprises an inner annular wall, an outer annular wall and a side wall, the side wall connects the inner annular wall and the outer annular wall, the side wall of the box shell is a closed end, and the other end, opposite to the side wall, of the box shell is an open end; the ramp gear is of an annular structure and is arranged in a space enclosed between the inner annular wall and the outer annular wall of the box shell, and the peripheral surface of the ramp gear is provided with a plurality of ramps which are spirally arranged; the push rod is arranged between the peripheral surface of the ramp gear and the outer annular wall of the box shell, the push rod comprises a main push rod, a bearing and a side limiting roller, the bearing is arranged at the bottom of the main push rod, the side limiting roller is arranged at one side of the main push rod, and the bearing of the push rod is arranged on a ramp of the ramp gear so as to convert the circular motion of the ramp gear into the linear motion of the push rod; the inner circumferential surface of the outer ring wall of the box shell is provided with a plurality of grooves which are arranged at intervals and are parallel to the axial direction, the side limiting roller of the push rod is arranged to be positioned in the groove, and the outer circumferential surface of the side limiting roller is clamped with the side surface of the groove.

In some embodiments, one end of the main push rod has a base portion having an inwardly recessed bearing chamber in which the bearing is mounted by a pin.

In some embodiments, the base portion is a U-shaped base, two sides of the base portion have protruding supporting seats, the supporting seats have corresponding through holes, and the pin shaft is inserted into the through holes.

In some embodiments, the side limiting roller is mounted on the pin shaft through a shaft sleeve, and a shaft shoulder of the pin shaft on the inner side and a circlip on the outer side, through which the side limiting roller passes, are fixedly mounted.

In some embodiments, the pin shaft has a first pin hole along a radial direction thereof, and the support seat on one side of the base portion also has a corresponding second pin hole, and the pin shaft is fixedly connected with the base portion through a pin or an elastic rolling sheet installed in the two pin holes.

In some embodiments, an end of the main push rod opposite to the base portion has an axially arranged hollow portion, and/or the base portion is an arc-shaped support seat.

In some embodiments, the entrance end of the recess is flush with the end surface of the open end of the cabinet, and/or the recess has an enlarged portion on the side away from the inner peripheral surface of the outer annular wall, the recess being rectangular in cross section.

In some embodiments, the housing has a thickened structure at locations on both sides of each of the recesses.

In some embodiments, the thickened structure includes a thickened upper rim at an end location of the open end of the cabinet and a thickened lower rim at an end location of the closed end of the cabinet.

In some embodiments, the edges of the groove and the end face of the open end of the cabinet are in transition connection by adopting a chamfer or a fillet; the inner annular wall, the outer annular wall and the side wall of the box shell are integrally formed.

According to another aspect of the invention, there is also provided an all-disc brake comprising the transmission as described above.

According to the transmission device of the full-disc brake and the full-disc brake, the beneficial effects at least comprise that:

(1) According to the full-disc brake of the embodiment of the invention, as the transmission device is provided with the side limiting roller at the outer side of the push rod 100, the inner side surface of the box shell is provided with the groove, and the side limiting roller is clamped in the groove, the torque or bending moment borne by the push rod can be completely transmitted to the box shell and then transmitted to the axle through the box shell. The whole full-disc brake is more scientific and reasonable in stress, and the transmission process of the transmission device is more stable.

(2) According to the push rod provided by the embodiment of the invention, the bottom of the push rod is supported by the bearing, so that the friction resistance can be further reduced, the power consumption is reduced, the brake can exert the maximum efficiency, and the green low-carbon economic requirement is met. The base part of the push rod adopts an arc-shaped supporting structure, so that the bearing capacity of the whole push rod can be improved.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

It will be appreciated by those skilled in the art that the objects and advantages that can be achieved with the present invention are not limited to the specific details set forth above, and that these and other objects that can be achieved with the present invention will be more clearly understood from the detailed description that 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 application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. For purposes of illustrating and describing some portions of the present invention, corresponding parts of the drawings may be exaggerated, i.e., may be larger, relative to other components in an exemplary apparatus actually manufactured according to the present invention. In the drawings:

fig. 1 is a schematic structural diagram of an all-disc brake in the prior art.

Fig. 2 is an exploded view of the transmission according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a transmission device according to an embodiment of the invention.

Fig. 4 is a schematic perspective view of a push rod according to an embodiment of the present invention.

Fig. 5 is a schematic front view of a push rod according to an embodiment of the present invention.

Fig. 6 is a schematic side view of a push rod according to an embodiment of the invention.

Fig. 7 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 6.

Fig. 8 is a schematic perspective view of a push rod according to an embodiment of the present invention.

FIG. 9 is a perspective view of a cabinet according to one embodiment of the present invention.

Fig. 10 is a partially enlarged view of a portion C in fig. 9.

FIG. 11 is a front view of the cabinet in one embodiment of the invention.

FIG. 12 is a side view of the enclosure in one embodiment of the invention.

FIG. 13 is a schematic view of the bottom of the enclosure from the perspective of the bottom of the enclosure in one embodiment of the invention.

Fig. 14 is a schematic diagram illustrating the force analysis of the push rod in the transmission process according to the present invention.

Reference numerals are as follows:

100. a push rod; 110. a main push rod; 111. a base part; 112. a bearing chamber; 113. a supporting seat; 114. a through hole; 115. an arc-shaped supporting seat; 116. a second pin hole; 117. a hollow part; 120. a bearing; 130. a pin shaft; 131. a shaft shoulder; 132. a first pin hole; 140. a side limiting roller; 141. a shaft sleeve; 142. a circlip;

200. a cabinet housing; 210. an inner annular wall; 220. an outer annular wall; 221. a groove; 222. an enlarging portion; 223. thickening the upper edge; 224. thickening the lower edge; 225. a process platform; 226. a cover plate connecting hole; 227. round corners; 230. a side wall; 231. a sidewall thickening portion; 240. a cover plate; 241. a limiting hole; 300. a ramp gear; 301. an inner gear ring; 302. a ramp; 400. a gear shaft;

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the solution according to the present invention are shown in the drawings, and other details not so related to the present invention are omitted.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.

It is also noted that, unless otherwise specified, the term "coupled" is used herein to refer not only to a direct connection, but also to an indirect connection with an intermediate.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar components, or the same or similar steps.

The invention aims to provide a full-disc brake and a transmission device thereof, and aims to solve the problem that the conventional disc brake is unreasonable in stress.

Fig. 1 is a schematic structural diagram of an all-disc brake in the prior art, which may include a driving device, a transmission device, a brake disc 600, friction plates, a casing, and the like. Wherein the housing may include the housing 200, the cover plate 240, and the outer cover 700 arranged in the axial direction of the brake disc 600 and relatively fixedly coupled by the coupling member. Wherein the housing 200 is used to mount the transmission, the cover 240 is used to cover the housing 200 and attach the brake to the axle flange, and the outer cover 700 is used to cover the brake disc 600. The housing 200 and the outer cover 700 serve primarily as housings for the brake of the present invention, and the cover 240 is interposed between the housing 200 and the outer cover 700 for enclosing a portion of the actuator within the housing 200 and mounting the brake to the axle flange.

The full-disc brake can be driven by using the air chamber push rod 100 of the existing drum brake and an automatic adjusting mechanism or an electric device as a driving device. The transmission may use the principles of gear transmission and screw transmission to convert circular motion into linear motion of the friction plates, thereby generating a braking torque. The friction plates are disposed on both sides of the disc, and may include a dynamic friction plate 810 and a static friction plate 820. The transmission means may include the gear shaft 400, the ramp gear 300, the push rod 100, and the like. The ramp gear 300 is a ring gear with partial internal teeth, and the gear shaft 400 is engaged with the internal teeth of the ramp gear 300. The outer peripheral surface of the ramp gear 300 is provided with a plurality of spiral ramps 302, the push rod 100 is arranged at the ramps 302, under the limiting action of the limiting holes 241 of the cover plate 240, the push rod 100 moves along a straight line and pushes the thrust frame 500 to be close to the brake disc 600, the dynamic friction plate 810 is pushed to be pressed against one end of the brake disc 600, the brake disc 600 slides in the axial direction of the outer hub in a small displacement mode and is pressed with the friction plates on two sides of the brake disc 600, and therefore braking torque is generated. The full-disc brake applies a ramp 302 force-increasing principle, a spiral slope surface is arranged on the circumferential surface of a ramp gear 300, the rotary motion of the slope surface is converted into linear motion, and multiple force increasing can be realized through the transmission device.

In the full-disc brake, the push rod is pushed by the ramp gear, and due to the spiral structure of the ramp, the push rod can bear certain torque, so that the friction force between the push rod and the cover plate is increased, and the conditions of unstable transmission process, partial power loss and the like are caused.

According to one aspect of the invention, the transmission device of the full-disc brake is provided, the transmission device can reduce the torque and the friction force between the push rod and the cover plate in the process of transmitting the braking force, so that the stress of the whole full-disc brake is more scientific and reasonable, the transmission process is more stable, and the structural design of the full-disc brake is optimized.

In some embodiments, as shown in fig. 2 and 3, the transmission includes a housing 200 and a linear translation mechanism within housing 200 that includes ramp gear 300 and push rod 100.

As shown in FIG. 9, the cabinet 200 has a ring-shaped structure including an inner ring wall 210, an outer ring wall 220, and a side wall 230, the side wall 230 connects the inner ring wall 210 and the outer ring wall 220, the side wall 230 of the cabinet 200 is a closed end, and the other end of the cabinet 200 opposite to the side wall 230 is an open end.

The ramp gear 300 is of a ring structure and is installed in a space defined between the inner ring wall 210 and the outer ring wall 220 of the cabinet 200, and the outer circumferential surface of the ramp gear 300 has a plurality of ramps 302 spirally arranged.

The push rod 100 is installed between the outer circumferential surface of the ramp gear 300 and the outer circumferential wall 220 of the cabinet 200, the push rod 100 includes a main push rod 110, a bearing 120 and a side limiting roller, the bearing 120 is installed at the bottom of the main push rod 110, the side limiting roller is installed at one side of the main push rod 110, and the bearing 120 of the push rod 100 is disposed on the ramp 302 of the ramp gear 300 to convert the circular motion of the ramp gear 300 into the linear motion of the push rod 100.

The inner circumferential surface of the outer circumferential wall 220 of the cabinet 200 has a plurality of grooves 221 spaced apart from each other in parallel with the axial direction, the side restricting rollers of the push rod 100 are disposed to be positioned in the grooves 221, and the outer circumferential surfaces of the side restricting rollers are engaged with both side surfaces of the grooves 221, that is, the side restricting rollers 140 roll in the grooves 221.

When the ramp gear 300 rotates, the thrust rod 100 is forced by the rotation of the spiral ramp 302, and not only bears a certain thrust force along the rod direction (normal direction of the ramp 302), but also bears a part of the thrust force along the tangential direction of the ramp 302, which may cause the thrust rod 100 to bear a torque or a bending moment. According to the full-disc brake of the embodiment of the invention, as the transmission device is provided with the side limiting roller 140 at the outer side of the push rod 100, the groove 221 is formed in the inner side surface of the box shell 200, and the side limiting roller 140 is clamped in the groove 221, the torque or bending moment borne by the push rod 100 can be completely transmitted to the box shell 200 and then transmitted to the axle through the box shell 200. The whole full-disc brake is more scientific and reasonable in stress, and the transmission process of the transmission device is more stable.

As shown in fig. 14, when the push rod 100 is pushed by the ramp gear, the push rod mainly receives forces in three directions, a reaction force F1 applied by the thrust bracket and the brake disk, a thrust force F2 applied by the ramp gear and perpendicular to the ramp direction, a force F3 applied by the cover plate, and a balance force F4 applied to the push rod and perpendicular to the push rod by the groove of the housing. The balance force F4 can be balanced with the component forces of the acting force F3 and the pushing force F2 exerted by the cover plate, so that the torque or bending moment borne by the lower part of the push rod 100 can be completely transmitted to the box shell 200, the friction force between the push rod and the cover plate is reduced, the transmission process is more stable, and the power consumption is reduced.

In some embodiments, as shown in fig. 4-8, one end of the main push rod 110 has a base portion 111, the base portion 111 has an inwardly recessed bearing chamber 112, and the bearing 120 is mounted in the bearing chamber 112 by a pin 130. The highest point of the outer circumferential surface of the bearing 120 protrudes out of the bearing chamber 112 for rolling on the ramp 302.

Further, the base portion 111 is a U-shaped base, two sides of the base portion are provided with protruding support bases 113, the support bases 113 are provided with corresponding through holes 114, and the pin 130 is inserted into the through holes 114. Preferably, a certain process platform 225 or a thickened design may be designed in the peripheral region of the through hole 114 of the supporting base 113 to avoid bending, breaking and the like at the supporting position around the through hole 114.

In some embodiments, as shown in fig. 7, the side-restraining roller 140 is mounted on the pin 130 through a bushing 141, and the side-restraining roller 140 is fixedly mounted through the shoulder 131 of the inner pin 130 and the circlip 142 of the outer pin.

In some embodiments, the pin 130 has a first pin hole 132 along a radial direction thereof, and the support base 113 on one side of the base portion 111 also has a corresponding second pin hole 116, and the pin 130 is fixedly connected to the base portion 111 by a pin or an elastic rolling sheet installed in the two pin holes.

In some embodiments, an end of the main push rod 110 opposite the base portion 111 has an axially disposed hollow 117. Under the condition of the same material sectional area, the hollow structure has better strength and rigidity, the wall thickness of the hollow structure cannot be too thin, and the phenomenon that the hollow structure is partially folded to lose the bearing capacity is prevented.

Further, as shown in fig. 8, the side surface of the non-support base portion 111 has an arc-shaped recess to further reduce the weight thereof. The base portion 111 of the putter 100 is an arc-shaped support base 115, and the arc-shaped support structure can improve the bearing capacity of the entire putter 100.

In some embodiments, the cross-sectional shape of the base is larger than the cross-sectional shape dimension of the main pushrod 110. The cross section of the main push rod 110 is a rectangle with a pair of arc-shaped sides.

Preferably, the bearing 120 is a needle bearing, which has small friction resistance, small power consumption, compact structure, light weight and more reduced axial dimension.

According to the push rod 100 of the embodiment of the invention, the bottom is supported by the bearing 120, so that the friction resistance can be further reduced, the power consumption is reduced, the brake can exert the maximum efficiency, and the green and low-carbon economic requirements are met.

Experiments prove that the push rod 100 is equivalent to a push rod in the prior art (such as the push rod in fig. 1), the bearing capacity of the push rod can be increased by 50%, and the push rod can transmit the braking force of up to 7 t. In addition, the lateral limiting roller 140 is installed on the outer side of the push rod 100, so that the bending moment or the torque can be effectively transmitted to the box shell 200, and the transmission process is more stable.

According to another aspect of the invention, there is also provided a housing 200 for an all-disc brake. As shown in fig. 9-12, the entrance end of the groove 221 is flush with the end surface of the open end of the cabinet 200 so that the side restricting roller 140 of the push lever 100 is fitted in. The side of the groove 221 away from the inner circumferential surface of the outer circumferential wall 220 has an enlarged portion 222, and the enlarged portion 222 has a size slightly larger than the diameter of the side-restricting roller 140 so that the side-restricting roller 140 can easily enter the groove 221. The cross-section of the groove 221 is substantially rectangular.

In some embodiments, the housing 200 has a thickened structure at locations on both sides of each recess 221 to increase the strength of the housing 200. Specifically, the thickened structure includes a thickened upper rim 223 at the end of the open end of the cabinet 200 and a thickened lower rim 224 at the end of the closed end of the cabinet 200. Further, as shown in fig. 13, the thickened structure may further include a sidewall thickening portion 231 on the sidewall 230, and the sidewall thickening portion 231 is used as a main stress-bearing portion of the sidewall and is located at a position corresponding to the groove of the cabinet shell, so as to enhance the strength of the peripheral region of the groove and avoid the structural damage caused by stress concentration.

In some embodiments, the enclosure 200 has a process station 225 on at least one side of the thickened rim 224.

In some embodiments, the edges of the groove 221 and the end surface of the open end of the cabinet 200 are in transition connection by using chamfers or fillets 227, so that stress concentration is avoided and the installation is convenient; the inner wall 210, the outer wall 220, and the side wall 230 of the housing 200 are integrally formed. The length of the groove 221 is smaller than the thickness of the cabinet 200.

In some embodiments, the number of the grooves 221 is the same as the number of the ramps 302 of the ramp gear 300 and the number of the push rods 100, and three grooves may be provided, but is not limited thereto.

The case 200 of the full-disc brake is provided with the groove 221 capable of being provided with the side limiting roller 140, so that the torque or bending moment of the push rod 100 of the full-disc brake can be effectively borne, and the force is transmitted to the axle, so that the stress of the whole full-disc brake is more scientific and reasonable, and the transmission process is more stable.

According to a further aspect of the invention, there is also provided an all-disc brake comprising the transmission as described above, which is particularly suitable for use in heavy trucks.

According to the transmission device of the full-disc brake and the full-disc brake, the beneficial effects at least comprising the following steps are obtained:

(1) According to the full-disc brake provided by the embodiment of the invention, the transmission device is provided with the side limiting roller at the outer side of the push rod, the inner side surface of the box shell is provided with the groove, and the side limiting roller is clamped in the groove, so that the torque or bending moment borne by the push rod can be completely transmitted to the box shell and then transmitted to the axle through the box shell. The whole full-disc brake is more scientific and reasonable in stress, and the transmission process of the transmission device is more stable.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments in the present invention.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The transmission device of the all-disc brake is characterized by comprising a housing and a linear conversion mechanism in the housing, wherein the linear conversion mechanism comprises a ramp gear and a push rod;

the box shell is of an annular structure and comprises an inner annular wall, an outer annular wall and a side wall, the side wall connects the inner annular wall and the outer annular wall, the side wall of the box shell is a closed end, and the other end, opposite to the side wall, of the box shell is an open end;

the ramp gear is of an annular structure and is arranged in a space enclosed between the inner annular wall and the outer annular wall of the box shell, and the peripheral surface of the ramp gear is provided with a plurality of ramps which are spirally arranged;

the push rod is arranged between the peripheral surface of the ramp gear and the outer annular wall of the box shell, the push rod comprises a main push rod, a bearing and a side limiting roller, the bearing is arranged at the bottom of the main push rod, the side limiting roller is arranged at one side of the main push rod, and the bearing of the push rod is arranged on a ramp of the ramp gear so as to convert the circular motion of the ramp gear into the linear motion of the push rod;

the inner circumferential surface of the outer ring wall of the box shell is provided with a plurality of grooves which are arranged at intervals and are parallel to the axial direction, the side limiting roller of the push rod is arranged to be positioned in the groove, and the outer circumferential surface of the side limiting roller is clamped with the side surface of the groove.

2. The transmission of an all-disc brake according to claim 1, characterized in that one end of the main push rod has a base portion having an inwardly recessed bearing chamber in which the bearing is mounted by a pin.

3. The transmission device of an all-disc brake according to claim 2, wherein the base portion is a U-shaped base having protruding support seats on both sides thereof, the support seats having corresponding through holes, and the pin shaft passing through the through holes.

4. The transmission device of the all-disc brake according to claim 3, wherein the side limiting roller is mounted on the pin shaft through a shaft sleeve, and a shaft shoulder of the inner pin shaft through which the side limiting roller passes and an outer elastic check ring are fixedly mounted.

5. The transmission device of the full-disc brake according to claim 3, wherein the pin shaft has a first pin hole along the radial direction thereof, and the support seat on one side of the base portion also has a corresponding second pin hole, and the pin shaft is fixedly connected with the base portion through a pin or an elastic rolling sheet installed in the two pin holes.

6. The transmission of an all-disc brake according to claim 2, characterized in that the end of the main push rod opposite to the base portion has an axially arranged hollow and/or the base portion is an arc-shaped support seat.

7. An all-disc brake transmission according to claim 1, wherein the inlet end of the recess is flush with the end face of the open end of the housing, and/or the recess has an enlarged portion on the side thereof remote from the inner peripheral surface of the outer annular wall, the recess being rectangular in cross section.

8. The transmission of an all-disc brake according to claim 7, characterized in that said housing has thickened structures at positions on both sides of each of said recesses;

the thickening structure is including being located the thickening of the terminal surface position of the open end of case shell is followed and is located the thickening of the terminal surface position of the blind end of case shell is followed down.

9. The transmission device of the all-disc brake as claimed in claim 7, wherein the edge of the groove is in transition connection with the end face of the open end of the housing by chamfering or filleting; the inner annular wall, the outer annular wall and the side wall of the box shell are integrally formed.

10. An all-disc brake, characterized in that it comprises a transmission device according to any one of claims 1 to 9.