CN211501417U - Pressure arm mechanism of air pressure disc brake and air pressure disc brake - Google Patents

Abstract

The utility model relates to an atmospheric pressure disc brake field discloses a pressure arm mechanism and atmospheric pressure disc brake of atmospheric pressure disc brake, install the pressure arm subassembly in first assembly chamber (2), the pressure arm subassembly includes pressure arm (13), pressure arm bush and roller bearing (14), it has atress portion (4) to form in first assembly chamber (2), the lower terminal surface of atress portion (4) is seted up and is used for cooperating notch (5) with roller bearing (14), the lower extreme of the circumference side of roller bearing (14) contacts with pressure arm (13), the upper end cooperation of the circumference side of roller bearing (14) is in cooperation notch (5); fabrication hole (6) have been seted up to the side of first assembly chamber (2), and cooperation notch (5) fall into in fabrication hole (6) along the projection region of cooperation notch (5) axis direction along the projection of cooperation notch (5) extending direction. The pressure arm mechanism has the advantages of simple assembly, few used parts, high production efficiency and the like.

Description

Pressure arm mechanism of air pressure disc brake and air pressure disc brake

Technical Field

The utility model relates to an atmospheric pressure disk brake field has especially related to an atmospheric pressure disk brake's pressure arm mechanism and atmospheric pressure disk brake.

Background

There are various air disc brakes on the market at present, and if classified according to the pushing mode, the air disc brakes can be classified into single-push-rod air disc brakes and double-push-rod air disc brakes, and the double-push-rod air disc brakes can be classified into axial air disc brakes and radial air disc brakes, and if classified according to the assembling mode of the rotating assembly, the air disc brakes can be classified into upper cover type air disc brakes and non-upper cover type air disc brakes. The non-upper cover type air pressure disc brake is mainly an axial double-push-rod air pressure disc brake, basically, the rotating component is in a small assembly form, and the rotating component is placed in the cavity of the integral caliper body in the assembly form and is sealed by a bottom cover, a sealing cover cap and the like; the upper cover type air pressure disc brake mainly comprises a single push rod air pressure disc brake and a radial double push rod air pressure disc brake.

The technical scheme discloses an integral brake caliper body, wherein a part of the brake caliper body replacing an end cover is of an integrally formed structure, a cavity for installing an adjusting mechanism is formed in the caliper body, wherein a special processing tool needs to be introduced in the processing process of a supporting surface and other parts, the brake caliper body is called an angle head in the industry, the clamping is inconvenient in the processing process of the angle head, the processing process of the angle head is complicated, the production efficiency is low, and the cost is high.

The utility model provides a for divide into two parts with the pincers body, but the lower part of upper cover portion and pincers body forms an organic whole, makes the pincers body upper cover portion need not use more bolt to fix, avoids traditional upper cover portion structural strength to need the defect of more bolted connection greatly.

Among the prior art, wuhan yuan feng automobile parts limited's patent 201410358047.5 discloses "have bearing limit structure's atmospheric pressure disk brake pressure arm", this pressure arm needs the stopper and matches the use at bearing at the installation, and it is narrow and small owing to the pincers body of non-end cover all has the installation cavity assembly mouth, is unfavorable for erection equipment and staff to get into and processes the assembly in this space in the actual assembling process, so the installation of stopper is very complicated under this kind of structure, and production efficiency is lower.

Patent 201510788100.X of Wuhan Yuanfeng automobile parts Limited discloses an assembly method of an air pressure disc brake, which utilizes an integral caliper, and from the attached drawings and the description of the specification, if the supporting surface is of an integrally formed structure, the selected integral caliper body is the integral caliper body of Weibo, and the defects of the caliper body are described in the documents; the supporting solution of the supporting surface selected for this purpose is the solution disclosed in its own patent 201410358047.5, using a limiting block, if the supporting surface is of non-integral structure, the drawbacks of which are also mentioned above. In addition, the assembly scheme requires a special fixture for assembly when the first component and the second component are assembled, so that the whole assembly process cannot be completed on the same processing equipment, and automation is not facilitated.

And traditional pivot and cylinder cap are line contact, and the contact force is great, causes spare part to become invalid easily. And the pivot is mostly the slip design, and frictional resistance is great, though patent 201410358047.5 discloses "the atmospheric pressure disk brake pressure arm that has bearing limit structure" uses needle bearing to realize rolling and replace the slip, but this kind of structural assembly is comparatively complicated.

In view of the problems in the prior art, the applicant provides a new technical solution to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses complicated, the integration pincers body machining efficiency of pivot stop gear is low and traditional pressure wall mechanism is the line contact among the prior art, and the great defects such as cooperation bearing of needs of contact force provide a pressure arm mechanism and atmospheric pressure disk brake of atmospheric pressure disk brake.

In order to solve the technical problem, the utility model discloses a following technical scheme can solve:

a pressure arm mechanism of an air disc brake comprises a first assembly cavity formed in a clamp body formed in an integrated mode, a pressure arm assembly is mounted in the first assembly cavity, the upper end face of the first assembly cavity is provided with a shaft hole and a pressing hole, the pressure arm assembly comprises a pressure arm and a rolling shaft, a stress part is formed in the first assembly cavity, the lower end face of the stress part is provided with a matching notch matched with the rolling shaft, the lower end of the circumferential side face of the rolling shaft is in contact with the pressure arm, the upper end of the circumferential side face of the rolling shaft is matched in the matching notch, and the axis of the matching notch is perpendicular to the axis of the shaft hole; the side of the first assembly cavity is provided with a fabrication hole, and the projection of the matching notch along the extending direction of the matching notch falls into the projection area of the fabrication hole along the axis direction of the matching notch. Thereby this pincers body is through the area of contact of design cooperation notch increase with the roller bearing, has reduced contact force between the two to make the roller bearing can take place to roll in the cooperation inslot, and the fabrication hole of design moreover, make processing cooperation notch simpler, only need fix a position the work piece can realize following the outside cooperation notch of direct processing out of high accuracy at horizontal machining center, the course of working can go on under same clamping condition with other processing position, so has practiced thrift process time greatly.

Preferably, the number of the process holes is two, the process holes are respectively formed in the left side wall of the first assembly cavity and the right side wall of the first assembly cavity, the process holes and the matching notches are coaxially arranged, the two process holes are convenient for machining the left matching notch and the right matching notch, and therefore the process holes are matched with the two rolling shafts.

Preferably, the number of the matching notches is two, and the matching notches are distributed on the left side and the right side of the shaft hole; one end of each matching notch, which is close to the shaft hole, is provided with a limiting surface for limiting the rolling shaft, and one end, which is far away from the shaft hole, is communicated with the fabrication hole in a through state.

As preferred, the number of atress portion is two, distributes in the both sides of shaft hole place axis, and the cooperation notch has all been seted up to the lower terminal surface of every atress portion, and the cooperation notch runs through the side that the atress portion kept away from shaft hole one end.

Preferably, mounting grooves are formed between the force-bearing part and the left side surface and the right side wall of the first mounting cavity, and the fabrication holes and the mounting notches are distributed on two sides of the mounting grooves. The mounting groove is used for facilitating the later stage to seal the process opening, and the guarantee is sealed more conveniently.

Preferably, the cross-section of the mating notch is arcuate. The cambered surface can be matched with the rolling shaft, so that the contact area is increased, and the line contact is changed into surface contact; and the projection of the partial side line of the section of the fabrication hole and the side line of the section of the assembly notch along the axial direction of the assembly notch is superposed.

Preferably, the pressure arm comprises a pressing part and an acting part connected with the pressing part, and further comprises an adjusting mechanism, the lower end of the acting part is abutted against the adjusting mechanism, the upper end of the acting part is provided with an assembling groove for installing a rolling shaft, and the rolling shaft is limited between the assembling groove and the matching notch; when the pressing part moves up and down, the acting part can be driven to rotate around the rolling shaft, and the lower end of the acting part drives the adjusting mechanism to work.

Preferably, the number of the action parts is two, and the action parts are workpieces with sector ring-shaped sections; the sealing seat is installed in the technical port and comprises an inserting portion inserted in the technical port and a limiting portion installed in the installing groove, the limiting portion limits the outer end of the rolling shaft, and the projection of the limiting portion in the axial direction of the rolling shaft covers the part or the whole of the projection of the rolling shaft in the axial direction of the rolling shaft.

Preferably, the sealing seat is in a step shape, and the cross-sectional area of the limiting part is larger than that of the inserting part.

Preferably, the first assembly cavity comprises a second cavity protruding towards the back, the left side and the right side of the first assembly cavity are provided with positioning platforms, the heights of the positioning platforms are smaller than the height of the upper end face of the first assembly cavity, column pin holes are formed in the positioning platforms, positioning shoulders are arranged on the outer sides of the column pin holes and arranged on the positioning platforms, positioning grooves are formed in the left side and the right side of the lower end of the clamp body, and the inner side faces of the positioning grooves are positioning faces. By adopting the structure, the limitation of 6 degrees of freedom of the clamp body can be realized during installation, the clamp body can be conveniently machined on a horizontal machining center, and the accuracy of the size of each position is ensured; the positioning groove is tetrahedron in shape, so the positioning groove can realize the limiting in two directions, and the forming process is optimized. The lower extreme of the preceding terminal surface of pincers body is provided with the plane that is used for the clamping to use as the point of compressing tightly.

The utility model also discloses an atmospheric pressure disk brake, this atmospheric pressure disk brake include above-mentioned pressure arm mechanism.

The utility model discloses owing to adopted above technical scheme, have following apparent technological effect:

the utility model discloses a design pincers body structure, creative adoption outside processing's method makes can form the high accuracy in the pincers body and roller bearing complex arc wall, has practiced thrift the processing cost greatly for traditional integrated into one piece, and machining efficiency is also very high moreover. Meanwhile, the area of the contact part of the assembly notch and the roller is increased, so that the contact force is reduced, and the roller can roll more conveniently and simply. Meanwhile, the clamp body is convenient to clamp and position, all processing items can be completed by one-time clamping on one processing center, and the position accuracy between the processing parts of the clamp body is ensured. Meanwhile, the clamp body with the structure is convenient for assembling parts of the air pressure disc brake.

And utilize the pressure arm mechanism of this kind of pincers body assembly to have the assembly simple, the less advantage of contact force, because adopt curved cooperation notch to assemble the pivot, greatly reduced the contact force of roller bearing and atress portion, make the roller bearing look after need coating lubricating grease just can take place to roll between cooperation notch and assembly groove, the assembly of this partial structure has been simplified greatly, and both ends all carry on spacingly about the roller bearing, can guarantee that the roller bearing can not break away from the effect portion, make the whole atress of effect portion more balanced.

Drawings

Fig. 1 is a schematic view of the overall structure of the caliper body.

Fig. 2 is a perspective view of the rear view of the caliper body.

Fig. 3 is a left side view of fig. 1.

Fig. 4 is a schematic perspective view of the cross-sectional view of fig. 3B-B.

Fig. 5 is an initial state diagram in the clamping state of the caliper body.

Fig. 6 is a schematic structural view of the air disc brake.

Fig. 7 is a left side view of fig. 6.

Fig. 8 is a cross-sectional view of fig. 7.

Fig. 9 is a partially enlarged view of fig. 8.

FIG. 10 is a schematic diagram of the construction of the pressure arm assembly.

The names of the parts indicated by the numerical references in the drawings are as follows: the clamp comprises a clamp body 1, a clamp body 2, a first assembly cavity, a shaft hole 3, a stress part 4, a matching notch 5, a fabrication hole 6, a limiting surface 7, an installation groove 8, a second cavity 9, a positioning table 10, a positioning shoulder 11, a positioning groove 12, a pressure arm 13, a rolling shaft 14, a pressing part 15, an action part 16, an adjusting mechanism 17, an assembly groove 18, a sealing seat 19, an insertion part 20, a limiting part 21, a pin hole 30 and a pressing hole 31.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

As shown in fig. 1 to 4, a pressure arm mechanism of a pneumatic disc brake includes a caliper body 1 formed integrally and a pressure arm assembly installed in the caliper body 1, wherein the caliper body 1 is formed by integral casting. The upper, lower, left, right, front and rear positions below are based on fig. 1. A first assembling cavity 2 for assembling the pressure arm assembly is formed in the clamp body 1, a shaft hole 3 is formed in the upper end face of the first assembling cavity 2, the center of the shaft hole 3 is the braking center of the brake, and an adjusting rod of the adjuster is assembled in the shaft hole 3 during assembling. The first assembly cavity 2 is formed with a stress part 4, and the stress part 4 is a boss integrally formed in the first assembly cavity 2 and extending downwards. The lower end face of the stress part 4 is provided with a matching notch 5 used for matching with the roller 14, and the axis of the matching notch 5 is vertical to the axis of the shaft hole 3; fabrication hole 6 has been seted up to the side of first assembly chamber 2, and cooperation notch 5 falls into in the projection region of fabrication hole 6 along 5 axis directions of cooperation notch along the projection of 5 extending directions of cooperation notch, and fabrication hole 6 is used for processing cooperation notch 5, because directly processes from the lower extreme opening of first assembly chamber 2, not only need use the angle head to reduce machining efficiency, and angle head processing also hardly processes out the cooperation notch 5 of the shape that this embodiment narrated moreover. Thereby this pincers body 1 is through the increase of design cooperation notch 5 and the area of contact of roller bearing 14, contact force between the two has been reduced, thereby make roller bearing 14 can take place to roll in the cooperation inslot, and the fabrication hole 6 of design, make processing cooperation notch 5 simpler, only need fix a position the work piece can realize following outside direct processing and go out the cooperation notch 5 of high accuracy at horizontal machining center, the course of working can go on under same clamping condition with other processing position, so the process time has been practiced thrift greatly.

In the present embodiment, since the single push rod type air disc brake has two rollers 14, the number of the fitting notches 5 and the tooling holes 6 is also two in the present embodiment in order to match therewith. Two fabrication holes 6 are respectively arranged on the left side wall of the first assembly cavity 2 and the right side wall of the first assembly cavity 2, the fabrication holes 6 are coaxially arranged with the matching notches 5, and the two fabrication holes 6 are respectively used for processing the matching notches 5 on the left side and the matching notches 5 on the right side, so that the two fabrication holes are matched with the two rolling shafts 14. The two matching notches 5 are respectively distributed on the left side and the right side of the shaft hole 3; one end of each matching notch 5, which is close to the shaft hole 3, is provided with a limiting surface 7 for limiting the rolling shaft 14, and one end, which is far away from the shaft hole 3, is communicated with the technical hole 6 in a through state.

For the convenience of processing cooperation notch 5 and be convenient for guiding mechanism 17 and pressure arm subassembly assembly, the number of atress portion 4 is two, distributes in the both sides of shaft hole 3 place axis, and cooperation notch 5 has all been seted up to the lower terminal surface of every atress portion 4, and cooperation notch 5 runs through the side that atress portion 4 kept away from 3 one ends in shaft hole. Mounting grooves 8 are formed between the force bearing part 4 and the left side surface and the right side wall of the first assembly cavity 2, and the fabrication holes 6 and the assembly grooves 18 are distributed on two sides of the mounting grooves 8. The mounting groove 8 is used for sealing the process opening in the later period, and the sealing is guaranteed to be more convenient.

Because the cross-section of roller 14 is circular, so the cross-section of cooperation notch 5 is the arc, and when the assembly, the upper end of roller 14 is contradicted in cooperation notch 5 to increased area of contact, made the line contact become the face contact, make roller 14 can roll in cooperation notch 5 smoothly.

For the sake of clarity, how the pliers body 1 is machined in the present embodiment, the following describes how the pliers body 1 is clamped during machining.

Firstly, 6 degrees of freedom of the caliper body 1 need to be limited in the clamping process. The clamping process utilizes a horizontal machining center for machining. First assembly chamber 2 includes to the bellied second chamber 9 in back, the left and right sides setting in first assembly chamber 2 is formed with location platform 10, location platform 10 place highly is less than the height at first assembly chamber 2 up end place, be formed with column pinhole 30 on the location platform 10, the outside of column pinhole 30 is provided with location shoulder 11, location shoulder 11 integrated into one piece is on location platform 10, in this embodiment well, column pinhole 30 is the pipe fitting, the pipe fitting forms an organic whole with pincers body 1, and the shaping has the strengthening rib between the lateral wall of pipe fitting and the pincers body 1. And the left side and the right side of the lower end of the forceps body 1 are both provided with a positioning groove 12, and the inner side surface of the positioning groove 12 is a positioning surface. By adopting the structure, the limitation of 16 degrees of freedom of the clamp body can be realized during installation, the clamp body can be conveniently machined on a horizontal machining center, and the accuracy of the size of each position is ensured. The positioning groove 12 is in a tetrahedron shape, so that the positioning groove 12 can limit in two directions, and a forming process is optimized; the lower end of the front end face of the pliers body 1 is provided with a plane used for clamping and serving as a pressing point.

As shown in fig. 6 to 10, the upper end surface of the first assembling chamber 2 is provided with a pressing hole 31, and it is obvious that the pressing hole 31 and the shaft hole 3 are both communicated with the first assembling chamber 2. In this embodiment, the pressure arm assembly includes a pressure arm 13 and a roller 14, and further includes a pressure arm bushing installed on the pressure arm 13, a lower end of a circumferential side of the roller 14 contacts the pressure arm 13, and an upper end of the circumferential side of the roller 14 is fitted in the fitting notch 5, so that the roller 14 is limited between the upper fitting notch 5 and the lower pressure arm 13, and an end of the roller 14 close to the shaft hole 3 is limited by the limiting surface 7.

The specific structure of the pressure arm 13 is described in detail below. The pressing arm 13 includes a pressing portion 15 and an acting portion 16 connected to the pressing portion 15, and a pressing end of the pressing portion 15 is located at a pressing opening 31, and can act on the pressing portion 15 through the pressing opening 31. The lower end of the action part 16 is abutted against the adjusting mechanism 17. In this embodiment, the upper end of the adjustment mechanism 17 is provided with a semicircular groove in which a bearing assembly is mounted, and the lower end surface of the action portion 16 is fitted with the bearing assembly. The upper end of the acting part 16 is provided with a mounting groove 18 for mounting the roller 14, wherein the pressure arm bushing is mounted in the mounting groove 18 to contact the roller 14, and the roller 14 is limited between the mounting groove 18 and the matching notch 5; when the pressing portion 15 moves up and down, the pressing portion 16 is driven to rotate around the roller 14, and the lower end of the pressing portion 16 drives the adjusting mechanism 17 to work. The number of the action parts 16 is two, the two action parts 16 correspond to the rollers 14 one by one, the two action parts 16 are respectively distributed on the left side and the right side of the pressing part 15, and the action parts 16 are workpieces with sector ring-shaped sections. The pressing portion 15 in this embodiment is in the shape of a rod as a whole.

In order to seal the process opening and prevent the roller 14 from sliding left and right greatly, in the embodiment, a sealing seat 19 is installed in the process opening, the sealing seat 19 includes an inserting part 20 inserted in the process opening, and also includes a limiting part 21 installed in the installation groove 8, the limiting part 21 limits the outer end of the roller 14, the projection of the limiting part 21 along the axial direction of the roller 14 covers part or all of the projection of the roller 14 along the axial direction of the roller 14, so as to limit the left and right movement of the roller 14, in the embodiment, the sealing seat 19 is an elastic rubber member, and the projection of the limiting part 21 along the axial direction of the roller 14 covers all of the projection of the roller 14 along the axial direction of the roller 14. The cross-sectional area of the acting part 16 and the roller 14 can be ensured, and the condition that the acting part 16 is stressed unevenly due to large left-right sliding of the roller 14 and the damage of parts is avoided.

Because the contact surface of the roller 14 and the caliper body 1 is a cambered surface, the contact force per unit area is smaller because the linear contact is replaced by the surface contact, so that the roller 14 can roll, the resistance and the assembly complexity are reduced, and the roller 14 can roll only by coating lubricating grease without using a needle bearing between the roller 14 and the pressure arm 13.

In order to facilitate understanding of the technical solution, the clamping process of the caliper body 1 is further described as follows: it should be noted that the vertical, left, right, front and rear orientations described below are referred to with reference to fig. 5, and fig. 5 shows an initial state when the caliper body 1 is clamped.

Positioning in the up-down direction: the upper end surface of the positioning groove 12, the lower side surface of the positioning shoulder 11 and two surfaces which are symmetrical at the other side are used as positioning surfaces, and the end surface of the upper side caliper body 1 of the positioning groove 12, the upper end surface of the positioning shoulder 11 and points which are symmetrical on the two end surfaces at the other side are used as pressing points; the positioning in the up-and-down direction is realized;

positioning in the left-right direction: the left side surface of the positioning groove 12 and the left side surface of the positioning groove 12 on the other symmetrical side are positioning surfaces, and the end surface of the left end positioning table 10 and the point on the end surface of the positioning table 10 chopped into the other side are selected as compaction points; the positioning in the left and right directions is realized;

positioning in the front-back direction: the front end face and the rear end face of the outer side wall of the second cavity 9 are used as positioning faces to realize positioning in the front-rear direction.

After the positioning is finished, the shaft hole 3, the pin hole 30 and the fabrication hole 6 are processed in the horizontal machining center, and the matching notch 5 is processed from the fabrication hole 6.

According to the embodiment, the structure of the clamp body 1 is designed, and the arc-shaped groove matched with the roller 14 with high precision can be formed in the clamp body 1 by creatively adopting an external processing method, so that the processing cost is greatly saved compared with the traditional integrated forming method, and the processing efficiency is also high. Meanwhile, the area of the contact part of the matching notch 5 and the roller 14 is increased, so that the contact force is reduced, and the roller 14 can roll more conveniently and simply. Meanwhile, the clamp body 1 is convenient to clamp and position, all processing items can be completed on one processing center by one-time clamping, and the position accuracy between the processing parts of the clamp body 1 is ensured. Meanwhile, the clamp body 1 with the structure is convenient for assembling parts of the air pressure disc brake.

And utilize the pressure arm 13 mechanism of this kind of pincers body 1 assembly to have the assembly simple, the advantage that the contact force is less, because adopt curved cooperation notch 5 to assemble the pivot, greatly reduced the contact force of roller 14 with atress portion 4, make roller 14 look after need coat lubricating grease just can take place to roll between cooperation notch 5 and assembly groove 18, the assembly of this part structure has been simplified greatly, and both ends are all carried on spacingly about roller 14, can guarantee that roller 14 can not break away from effect portion 16, make the whole atress of effect portion 16 more balanced.

Example 2

Different from the embodiment 1, the partial side line of the section of the fabrication hole 6 in the embodiment coincides with the projection of the side line of the section of the opening of the assembly groove 18 along the axial direction of the opening of the assembly groove 18, and the structure limits the fabrication hole 6 and the matching notch 5 to be arranged in the same axial line and the same radius, so that the processing precision can be ensured.

Example 3

Different from embodiment 1, the number of fabrication holes 6 is one, and limit surface 7 is not provided, so during processing, only one fabrication hole 6 needs to be continuously processed, two matching notches 5 are processed, and the matching notches 5 penetrate through the left end surface and the right end surface of the stress part 4 where the matching notches are respectively located.

Example 4

This embodiment is different from embodiment 3 in that: the number of the stress parts 4 is one, and the middle part of the stress part 4 is provided with an assembling space for assembling the pressure arm component of the adjusting mechanism 17.

Example 5

This embodiment is different from embodiment 1 in that: the projection of the stopper portion 21 in the axial direction of the roller 14 covers the portion of the roller projected in the axial direction of the roller 14.

Example 6

This embodiment discloses an air disc brake, which is a single push rod brake, equipped with the pressure arm mechanism described in embodiment 1.

In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the scope of the present invention.

Claims (10)

1. A pressure arm mechanism of an air pressure disc brake is characterized in that: the clamp comprises an integrally formed clamp body (1), a first assembly cavity (2) is formed in the clamp body (1), a pressure arm assembly is installed in the first assembly cavity (2), a shaft hole (3) and a pressing hole (31) are formed in the upper end face of the first assembly cavity (2), the pressure arm assembly comprises a pressure arm (13) and a roller (14), a stress part (4) is formed in the first assembly cavity (2), a matching notch (5) matched with the roller (14) is formed in the lower end face of the stress part (4), the lower end of the circumferential side face of the roller (14) is contacted with the pressure arm (13), the upper end of the circumferential side face of the roller (14) is matched in the matching notch (5), and the axis of the matching notch (5) is vertical to the axis of the shaft hole (3); fabrication hole (6) have been seted up to the side of first assembly chamber (2), and cooperation notch (5) fall into in fabrication hole (6) along the projection region of cooperation notch (5) axis direction along the projection of cooperation notch (5) extending direction.

2. The pressure arm mechanism of an air disc brake according to claim 1, wherein: the number of the process holes (6) is two, the process holes are respectively arranged on the left side wall of the first assembly cavity (2) and the right side wall of the first assembly cavity (2), and the process holes (6) and the matching notches (5) are arranged coaxially.

3. The pressure arm mechanism of an air disc brake according to claim 2, wherein: the number of the matching notches (5) is two, and the matching notches are distributed on the left side and the right side of the shaft hole (3); one end of each matching notch (5) close to the shaft hole (3) is provided with a limiting surface (7) used for limiting the rolling shaft (14), and one end far away from the shaft hole (3) is communicated with the technical hole (6) in a through state.

4. A pressure arm mechanism of an air disc brake according to claim 1, 2 or 3, wherein: the number of atress portion (4) is two, distributes in the both sides of shaft hole (3) place axis, and cooperation notch (5) have all been seted up to the lower terminal surface of every atress portion (4).

5. A pressure arm mechanism of an air disc brake according to claim 2 or 3, characterized in that: an installation groove (8) is formed between the stress part (4) and the left side face and the right side wall of the first assembly cavity (2), and the fabrication holes (6) and the assembly groove (18) are distributed on two sides of the installation groove (8).

6. A pressure arm mechanism of an air disc brake according to claim 1, 2 or 3, wherein: the cross section of the matching notch (5) is arc-shaped.

7. The pressure arm mechanism of an air disc brake according to claim 1, wherein: the pressure arm (13) comprises a pressing part (15) and an acting part (16) connected with the pressing part (15), and further comprises an adjusting mechanism (17), the lower end of the acting part (16) is matched with the adjusting mechanism (17), the upper end of the acting part (16) is provided with an assembling groove (18) used for installing a rolling shaft (14), and the rolling shaft (14) is limited between the assembling groove (18) and the matching notch (5); when the pressing part (15) moves up and down, the acting part (16) can be driven to rotate around the rolling shaft (14), and the lower end of the acting part (16) drives the adjusting mechanism (17) to work.

8. The pressure arm mechanism of an air disc brake according to claim 7, wherein: the number of the action parts (16) is two, and the action parts (16) are workpieces with sector ring-shaped sections; a sealing seat (19) is installed in the process port, the sealing seat (19) comprises an inserting part (20) inserted in the process port and a limiting part (21) installed in the installation groove (8), the limiting part (21) limits the outer end of the rolling shaft (14), and the projection of the limiting part (21) along the axial direction of the rolling shaft (14) covers part or all of the projection of the rolling shaft (14) along the axial direction of the rolling shaft (14).

9. The pressure arm mechanism of an air disc brake according to claim 8, wherein: the sealing seat (19) is in a step shape, and the cross section area of the limiting part (21) is larger than that of the inserting part (20); the first assembly cavity (2) comprises a second cavity (9) protruding towards the back, positioning tables (10) are arranged and formed on the left side and the right side of the first assembly cavity (2), the height of each positioning table (10) is smaller than that of the upper end face of the first assembly cavity (2), a column pin hole (30) is formed in each positioning table (10), a positioning shoulder (11) is arranged on the outer side of each column pin hole (30), each positioning shoulder (11) is arranged on each positioning table (10), positioning grooves (12) are formed in the left side and the right side of the lower end of the clamp body (1), and the inner side faces of the positioning grooves (12) are positioning faces; the lower end of the front end face of the clamp body (1) is provided with a plane used for clamping and using as a pressing point.

10. Air disc brake, its characterized in that: a pressure arm mechanism comprising an air disc brake according to any one of claims 1 to 9.

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