CN216519310U - Brake with brake lining capable of returning quickly - Google Patents

Abstract

The utility model relates to the field of brakes and discloses a brake with a brake lining capable of returning quickly, which further comprises a reset reed, wherein the reset reed is supported on an inner friction lining and an outer friction lining, the reset reed comprises a reed base and a shifting sheet which is arranged on the reed base and used for supporting an inner friction sheet and an outer friction sheet, the four corners of the reed base are provided with the shifting sheets, and the whole reset reed is in an X shape; the clamp is characterized by further comprising a pressing plate, the reset reed is installed on the pressing plate to achieve positioning, and the pressing plate is fixedly installed on the clamp body. The reset reed and the reset mechanism have the advantages of being convenient to install, stable in supporting force, capable of reducing the problems of dragging, braking noise and the like.

Description

Brake with brake lining capable of returning quickly

Technical Field

The utility model relates to a disc brake field especially relates to a stopper of quick return of brake facing.

Background

The air pressure disc brake has the advantages of large bearing braking torque, strong heat dissipation performance, good water stability and the like, and becomes one of the preferred schemes of the current commercial automobile brake;

the conventional air disc brake basically has no brake lining resetting mechanism, and the brake lining mechanism cannot be reset after the braking of a driving vehicle is finished.

Although the proposal of patent No. 201510437414.5 proposes an air disc brake and its active return method of friction plates, it adopts two mechanisms of independent return springs sleeved on the pressure rods of the friction plates to provide return elastic force, and the two ends of the return springs are inserted into the long waist holes of the friction plates respectively. It has the following problems:

A. the structure arrangement that the springs are sleeved on the friction plate compression rods is adopted, and the compression rods need to be disassembled firstly when the spring pieces are replaced, so that the spring replacing and disassembling process is complicated;

B. the friction block is provided with a long waist hole, a spring inserted rod inserted into the friction block is in a suspended state, and the inserted rod can not provide return elastic force due to the suspended state in the braking process, so that the problems of insensitive or ineffective resetting of the friction plate and the like are caused;

C. two independent springs, independent action lacks the coupling and coordinates, can lead to the friction disc both sides atress unbalance, one side lag scheduling problem to appear, and then the problem such as clutch blocks vibration noise appears.

SUMMERY OF THE UTILITY MODEL

The utility model provides a brake with a brake lining capable of returning quickly and a return mechanism aiming at the defects of the prior art.

In order to solve the technical problem, the utility model is solved by the following technical scheme:

a brake with a brake lining capable of returning quickly comprises a caliper body, an inner friction lining and an outer friction lining, wherein the inner friction lining and the outer friction lining are used for being in contact with a brake disc; the support comprises a top plate and a bottom plate, the top plate and the bottom plate are positioned on two sides of the brake opening, and the top plate and the bottom plate are both provided with assembling openings used for matching the inner friction lining and the outer friction lining; the reset reed is supported on the inner friction lining and the outer friction lining, the reset reed comprises a reed base and shifting pieces which are arranged on the reed base and used for supporting the inner friction lining and the outer friction lining, the four corners of the reed base are provided with the shifting pieces, and the whole reset reed is in an X shape; the clamp is characterized by further comprising a pressing plate, the reset reed is installed on the pressing plate to achieve positioning, and the pressing plate is fixedly installed on the clamp body.

Preferably, the upper end of the clamp body is provided with a slot for assembling the pressure plate on the side of the reset spring, the opening of the slot faces downwards, the upper end of the pressure plate can be axially inserted into the slot, the lower end of the clamp body is provided with a fixed seat on the side of the reset spring, the lower end of the pressure plate is provided with a matching port, the matching port is inserted into the fixed seat, the fixed seat is provided with a jack penetrating through the fixed seat, the clamp further comprises a locking pin, the locking pin is inserted into the jack, the pressure plate is locked on the inner side of the jack, and two ends of the pressure plate are limited and fixed by the clamp body; the middle part of reset spring base is provided with spacing mouthful, and spacing mouthful protrusion reset spring base sets up, and the clamp plate is pegged graft in spacing mouthful, and reset spring is spacing on the clamp plate through the cooperation of spacing mouthful with the clamp plate.

Preferably, the middle part of the return spring base is provided with a lightening hole, the edge part of the lightening hole is provided with two limiting arms, the two limiting arms are arranged in a butting mode and are L-shaped, and a limiting opening is formed between each limiting arm and the return spring base.

Preferably, the brake pad further comprises a retaining reed, a connecting port used for being connected with the brake lining is formed in the retaining reed, the connecting port comprises at least 2 connecting ports, matching convex blocks matched with the connecting ports are arranged on the inner friction lining and the outer friction lining, the matching convex blocks are matched with the connecting port, the retaining reed is arranged on each of the inner friction lining and the outer friction lining, the limiting effect on the inner friction lining or the outer friction lining is achieved through the matching of the connecting port and the connecting block at the two ends of the retaining reed, the retaining reed is in a bent state when being arranged on the inner friction lining or the outer friction lining, the retaining reed is integrally arched, the arched part of the retaining reed is in a middle position, and the arched part of the retaining reed is abutted against the pressing plate.

Preferably, the reed base comprises a plate body and a shifting piece mounting platform arranged at four corners of the plate body, the shifting piece is fixedly connected with the reed base through the mounting platform, and the shifting piece mounting platform is formed by stamping and bending the reed base.

Preferably, the reed base is integrally in an M shape and is in a shape that the middle part is low and the two sides are high, the slot is arranged at the lower position of the middle part of the reed base, the pressing plate is arranged at the position of the middle part of the reed base, the reed base comprises a flat plate part at the middle part and bending parts at the two ends, and a first arc-shaped opening is formed at the connecting transition part of the flat plate part and the bending parts.

Preferably, the reed base is provided with a first reinforcing rib in a stamping mode, the middle of the reed base protrudes outwards to form at least 2 limiting arms, a limiting opening is formed between each limiting arm and the reed base, and the limiting arms play a role in limiting the left side, the right side and the outer side of the limiting opening.

Preferably, the automatic-adjusting reed switch also comprises automatic-adjusting reeds, wherein the shifting pieces are positioned at the upper end and the lower end of the automatic-adjusting reeds, the number of the automatic-adjusting reeds is 2, the automatic-adjusting reeds are respectively arranged at the left end and the right end of the reed base, and the automatic-adjusting reeds are fixedly arranged on the shifting piece mounting platform; the plectrum and the self-modulation reed be the integrative structure that the punching press formed, and the plectrum includes backing sheet and the supporting part that the backing sheet tip formed to reed base side buckling, and the plectrum is whole to be "claw" type, and the upper end and the equal punching press of lower extreme of self-modulation reed are buckled and are formed fixed platform, and the self-modulation reed passes through fixed platform fixed mounting on plectrum mounting platform, and fixed platform and plectrum mounting platform be welded fastening connection or can dismantle fixed connection.

Preferably, the reed base is punched to form 2 first reinforcing ribs which are respectively arranged on the upper side and the lower side of the limiting opening, the bending positions of the self-adjusting reed and the fixing platform are formed with second punching reinforcing ribs, the bending positions form bending-resistant arc openings, and two ends of each bending-resistant arc opening are abutted to or fixed on the shifting piece mounting platform.

Preferably, the clamp body comprises an assembly cavity at the top, and a pressure arm assembly, a semicircular bearing, a support seat assembly, a support seat, a pressure arm assembly and the like are assembled in the assembly cavity; wherein semi-circular bearing installs on the supporting seat assembly, and support and supporting seat assembly threaded connection, the lower extreme of support contradict including on the friction lining piece, the upper end in assembly chamber is provided with the end cover, and the supporting seat assembly includes return spring, and return spring contradicts on the pincers body, and the both sides of the pincers body are equipped with the guide pin shaft hole, the guide pin peg graft in the guide pin shaft hole and with the support fixed connection of lower extreme.

Through the technical scheme, the utility model has the following technical effects:

the scheme designs a brake with the brake lining capable of returning quickly, firstly, a scheme of arranging two semicircular bearings is adopted in the braking process, the pressure surface of an end cover can be increased, the stability of the structure is improved, meanwhile, the load per unit area is reduced, and the service life of a caliper body is prolonged. Secondly, the brake is provided with a brake block resetting mechanism, wherein a reed structure and inner and outer brake linings are in an elastic supporting state, so that the brake has a self-adjusting and self-adapting function, strong impact resistance and low brake noise; the reed mechanism and the pressing plate are in a penetrating and assembling relationship, and the reed mechanism has the advantages of convenience in replacement and maintenance and the like; in addition, the claw-type shifting piece structure has larger resetting elasticity, so that the brake piece can be ensured to return quickly, and the dragging problem is reduced.

Meanwhile, the brake is provided with a spring retaining mechanism which can flexibly position the friction lining and prevent the radial movement and centrifugal separation movement of the brake lining.

Drawings

Fig. 1 is a schematic view of the overall structure of the brake.

Fig. 2 is a sectional view of fig. 1.

Fig. 3 is a schematic view of the caliper body and end caps of fig. 1 removed.

FIG. 4 is a schematic view of the reset mechanism engaging the inner and outer friction pads.

Fig. 5 is a schematic view of the overall structure of the reset reed.

Fig. 6 is a schematic view of the overall structure of the reset reed.

Fig. 7 is a schematic structural view of the return mechanism.

The names of the parts indicated by the numerical references in the drawings are as follows: the spring plate comprises a spring plate base 1, a spring plate base 2, a shifting plate 3, a plate body 4, a shifting plate mounting platform 5, a flat plate part 6, a bending part 7, a first arc-shaped opening 8, a first reinforcing rib 9, a limiting arm 10, a limiting opening 11, a lightening hole 11, a self-adjusting spring plate 12, a supporting sheet 13, a supporting part 14, a supporting part 15, a fixing platform 16, a second stamping reinforcing rib 17, an anti-bending arc opening 18, a retaining spring plate 19, a connecting opening 20, a pressing plate 21, a support 22, a top plate 23, a bottom plate 23, an inner friction lining 24, an outer friction lining 25, an assembling opening 26, a resetting spring plate 27, a clamp 28, a clamp 29, a slot 29, a fixing seat 30, a locking pin 31, a lug 32, a pressure arm assembly 33, a semicircular bearing 34, a support seat 36, a support seat assembly 37, a guide pin, an end cover 40 and a return spring 41.

Detailed Description

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

Example 1

A brake with a quick return brake lining comprises a caliper body 28, an inner friction lining 24 and an outer friction lining 25, wherein the inner friction lining 24 and the outer friction lining 25 are used for being in contact with a brake disc, the caliper body 28 is provided with a support 21, one side of the support 21 is provided with a brake opening for placing the brake disc, and the inner friction lining 24 and the outer friction lining 25 move towards the middle of the brake opening under the action of a pressure arm; the support 21 comprises a top plate 22 and a bottom plate 23, the top plate 22 and the bottom plate 23 are positioned on two sides of a braking opening, the top plate 22 and the bottom plate 23 are both provided with assembling openings 26 used for matching an inner friction lining 24 and an outer friction lining 25, the support further comprises a reset reed 27, the reset reed 27 is supported on the inner friction lining 24 and the outer friction lining 25, the reset reed 27 comprises a reed base 1 and a plectrum 2 which is arranged on the reed base 1 and used for supporting the inner friction plate and the outer friction plate, the plectrum 2 is arranged at four corners of the reed base 1, and the whole reset reed 27 is in an X shape; the clamp also comprises a pressure plate 20, a reset reed 27 is arranged on the pressure plate 20 to realize positioning, and the pressure plate 20 is fixedly arranged on the clamp body 28. This arrangement ensures that both the inner and outer friction linings are supported by the two paddles 2 at the ends of the inner and outer brake linings 24 and 25, so that the brake linings are more evenly stressed. Meanwhile, the shifting sheet 2 is connected with the same reed base 1, so that the supporting points can be coordinated with each other, the stress of each stress point is balanced, the inner friction lining and the outer friction lining are reset synchronously and stably, and the noise and the vibration are reduced. It should be noted that the radially outer ends of the inner friction lining 24 and the outer friction lining 25 are restricted by the holding spring 18, and the other ends are restricted by the side surface of the fitting opening 26, which is defined as a restricting projection.

In this embodiment, a slot 29 for assembling the pressing plate 20 is disposed at the upper end of the clamp body 28 on the side of the return spring, an opening of the slot 29 is downward, the upper end of the pressing plate 20 can be axially inserted into the slot 29, a fixing seat 30 is disposed at the lower end of the clamp body 28 on the side of the return spring, a matching port 41 is disposed at the lower end of the pressing plate 20, the matching port 41 is inserted into the fixing seat 30, a jack penetrating through the fixing seat 30 is disposed on the fixing seat 30, the clamping device further includes a locking pin 31, the locking pin 31 is inserted into the jack, the pressing plate 20 is locked at the inner side of the jack, and two ends of the pressing plate 20 are limited and fixed by the clamp body 28; the middle part of reset spring base is provided with spacing mouthful 10, and spacing mouthful 10 protrusion reset spring base sets up, and clamp plate 20 pegs graft in spacing mouthful 10, and reset spring is spacing on clamp plate 20 through spacing mouthful 10 and clamp plate 20's cooperation. In this embodiment, the pressure plate 20 is bent at the mating opening 41 to form an arcuate mating opening 42, and the latch is dropped into the mating opening 42.

In this embodiment, a lightening hole 11 is formed in the middle of the return spring base, two limiting arms 9 are arranged on the edge of the lightening hole 11, the number of the limiting arms 9 is two, the two limiting arms are arranged in opposite directions, the limiting arms 9 are L-shaped, and a limiting opening 10 is formed between each limiting arm 9 and the return spring base. The limiting opening 10 with the structure can take out the reset spring by bending one of the limiting arms 9 when the reset reed 27 needs to be detached, so that the disassembly and the assembly are very convenient.

In the embodiment, the brake pad further comprises a retaining reed 18, a connecting port 19 used for being connected with a brake lining is formed in the retaining reed 18, the connecting port 19 comprises at least 2 connecting ports, matching protrusions 32 matched with the connecting port 19 are arranged on the inner friction lining 24 and the outer friction lining 25 respectively, the matching protrusions 32 are matched with the connecting port 19, the retaining reed 18 is arranged on each of the inner friction lining 24 and the outer friction lining 25, the two ends of the retaining reed 18 realize the flexible limiting effect on the inner friction lining or the outer friction lining through the matching of the connecting port 19 and a connecting block, the retaining reed 18 is in a bent state when being arranged on the inner friction lining or the outer friction lining, the retaining reed 18 is integrally arched, the arched part of the retaining reed 18 is in the middle position, and the arched part of the retaining reed 18 abuts against the pressing plate 20. When the brake lining, the retaining spring and the pressure plate 20 are mounted, the retaining spring exerts a certain mounting pretension. And a radial limiting boss is arranged on the other side of the bracket 21. Under the action of the pretension force of the retaining spring, the brake lining is pressed on the limiting boss on the support 21, so that a certain retaining effect is generated on the brake lining, and the brake lining is prevented from radially moving; meanwhile, in the braking process, the pressure plate 20 and the retaining spring also have a limiting effect on the friction lining, so that the friction lining is prevented from generating centrifugal separation movement.

In this embodiment, the reed base 1 includes the plate body 3 and the plectrum mounting platform 4 arranged at the four corners of the plate body 3, the plectrum 2 is fixedly connected with the reed base 1 through the mounting platform, and the plectrum mounting platform 4 is formed by stamping and bending the reed base 1. Meanwhile, the plectrum mounting platform 4 in the embodiment at least comprises a horizontal mounting surface, the horizontally arranged mounting surface is convenient for fixedly connecting the plectrum 2 with the plectrum 2 mounting seat, and is convenient for adjusting the height and the inclination of the whole plectrum 2 to be uniform or not, so that the pre-support force of each support point is ensured to be the same. Meanwhile, the plane arrangement structure is convenient for welding the self-adjusting reed 12 and is also convenient for position control. In this embodiment, the pick mounting platform 4 is a stamped and bent plate and is perpendicular to the spring base 1.

In this embodiment, the whole reed base 1 is "M" type and is the shape with low middle part and high two sides, the slot 29 is arranged at the lower position in the middle part of the reed base 1, the pressing plate 20 is arranged at the position in the middle part of the reed base 1, the reed base 1 comprises a flat plate part 5 in the middle part and bending parts 6 at two ends, and a first arc-shaped opening 7 is formed at the connection transition part of the flat plate part 5 and the bending parts 6. This kind of structure can guarantee that the radial deviation between reed base 1 and plectrum 2 falls to minimumly, and the supporting part 14 of plectrum 2 inwards removes in radial direction to can improve the stability that friction lining position resets, the space that this kind of structural design occupy is less moreover, need not adjust the installation space of stopper.

In this embodiment, the first reinforcing rib 8 is stamped and formed on the reed base 1, so that the rigidity of the base is increased, and the bending resistance of the base is improved. The middle part of the reed base 1 is outwards provided with at least 2 limiting arms 9 in a protruding mode, a limiting opening 10 is formed between the two limiting arms 9 and the reed base 1, and the limiting arms 9 play a role in limiting the left side, the right side and the outer side of the limiting opening 10.

In the embodiment, the automatic reed switch also comprises self-adjusting reeds 12, wherein the shifting pieces 2 are positioned at the upper end and the lower end of each self-adjusting reed 12, the number of the self-adjusting reeds 12 is 2, and the self-adjusting reeds 12 are respectively arranged at the left end and the right end of the reed base 1 and are fixedly arranged on the shifting piece mounting platform 4; plectrum 2 and self-modulation reed 12 are the integrative structure that the punching press formed, plectrum 2 includes backing sheet 13 and backing sheet 13 tip to the supporting part 14 that 1 side buckling of reed base formed, plectrum 2 wholly is "claw" type, the equal punching press of upper end and the lower extreme of self-modulation reed 12 is buckled and is formed fixed platform 15, 2 monolithic couplings of plectrum are on fixed platform 15 and are certain contained angle with fixed platform 15, self-modulation reed 12 passes through fixed platform 15 fixed mounting on plectrum mounting platform 4, fixed platform 15 and plectrum mounting platform 4 are welding fixed connection or can dismantle fixed connection. Wherein the self-adjusting reed 12 is attached to the reed base 1, and the fixed platform 15 and the plectrum mounting platform 4 are welded and fixed.

In this embodiment, the reed base 1 is stamped to form the first reinforcing ribs 8, the number of the first reinforcing ribs 8 is 2, the first reinforcing ribs are respectively arranged on the upper side and the lower side of the limiting opening 10, and reinforcing rib structures are distributed on the two side edges of the base, so that the rigidity of the base is increased, and the bending resistance of the base is improved. And a second stamping reinforcing rib 16 is formed at the bending part of the self-adjusting reed 12 and the fixed platform 15, an anti-bending arc opening 17 is formed at the bending part, and two ends of the anti-bending arc opening 17 are pressed against or fixed on the plectrum mounting platform 4. The shifting sheet 2 is connected with the base mounting platform through welding; the transition structure in the middle of the shifting piece 2 is attached to the end part of the mounting platform to form a double-support structure, so that the support rigidity of the shifting piece 2 is improved; meanwhile, reinforcing ribs are arranged at the arc transition positions of the shifting pieces 2, so that the rigidity of the mounting platform is improved; two sides of the shifting sheet 2 are of claw-shaped structures, so that good contact with a brake lining can be ensured, and the elasticity of the shifting sheet 2 can be improved.

The working principle of the friction lining return mechanism is as follows:

during braking, the caliper body 28 and the support seat assembly 36 move toward each other under the action of the pressure arm, compressing a return spring 60 disposed therebetween. The return spring is compressed and deformed, and elastic compression potential energy is stored; under the pressing action of the clamp body 28 and the support 35, the inner friction lining 25 and the outer friction lining 25 also move oppositely to press the self-adjusting reed 12. The compressed reed mechanism is elastically deformed, and elastic potential energy is stored;

when the service brake is released, the pressure arm returns. The external forces on the support seat assembly 36 and the caliper body 28 are removed. The compression potential energy of the return spring is released, the spring returns to extrude the support seat to be separated from the clamp body 28, and the acting force of the spring on the inner friction lining 25 and the outer friction lining 25 is eliminated; the potential energy stored in the shifting piece 2 is released, and the shifting piece 2 returns to push the brake lining to reset; and the brake lining is separated from the brake disc, thereby eliminating the dragging problem between the brake lining and the brake disc.

The scheme designs a brake with the brake lining capable of returning quickly, firstly, a scheme of arranging two semicircular bearings is adopted in the braking process, the pressure surface of an end cover can be increased, the stability of the structure is improved, meanwhile, the load per unit area is reduced, and the service life of a caliper body is prolonged. Secondly, the brake is provided with a brake block resetting mechanism, wherein a reed structure and inner and outer brake linings are in an elastic supporting state, so that the brake has a self-adjusting and self-adapting function, strong impact resistance and low brake noise; the reed mechanism and the pressing plate are in a penetrating and assembling relationship, and the reed mechanism has the advantages of convenience in replacement and maintenance and the like; in addition, the claw-type shifting piece structure has larger resetting elasticity, so that the brake piece can be ensured to return quickly, and the dragging problem is reduced.

Meanwhile, the brake is provided with a spring retaining mechanism which can flexibly position the friction lining and prevent the radial movement and centrifugal separation movement of the brake lining.

Example 2

This embodiment is different from embodiment 1 in that: the pincers body 28 includes the assembly chamber at top, the assembly intracavity is equipped with pressure arm assembly 33, semi-circular bearing 34, supporting seat assembly 36, support 35, pressure arm assembly 33 and semi-circular bearing 34 are installed on supporting seat assembly 36, support 35 and supporting seat assembly 36 threaded connection, on the friction pad including the lower extreme of support 35 contradicts, the upper end in assembly chamber is provided with end cover 40, supporting seat assembly 36 includes return spring 60, return spring 60 contradicts on pincers body 28, the both sides of pincers body 28 are equipped with guide pin 37 shaft holes, guide pin 37 pegs graft in guide pin 37 shaft holes and with support 21 fixed connection of lower extreme.

The service braking mechanism and the working principle are as follows:

after the driver has initiated the braking action, an external force is applied to the head of the pressure arm 33. The pressure arm is assembled with the support seat assembly 36, the semicircular bearing 34 and the end cover 40 to form a lever mechanism, and the pressure arm rotates around the support seat assembly 36 at a certain angular displacement under the action of external force. In this process, the support seat assembly 36 as a fulcrum is axially displaced by the pressing action of the pressure arm, and the support seat 35 is fitted to the bottom of the support seat assembly. The support 35 is pressed against the inner friction lining 24 towards the brake disc after being subjected to the force of the adjusting sleeve. After the disc surface clearance between the inner friction lining 24 and the brake disc is eliminated, the inner friction lining 24 starts to press the brake disc to form a single-side friction braking action;

the end part of the pressure arm which generates certain angular displacement rotation extrudes the semicircular bearing 34 and the cylinder cover at the other side of the pressure arm, wherein the arrangement scheme of two semicircular bearings 34 is adopted, the pressure surface of the end cover 40 is increased, and the stability of the structure is improved. The end cap 40 subjected to the load force moves the caliper body 28 together by fastening the bolt. The outer friction lining 25 is assembled at the hook head position of the caliper body 28, and the moving caliper body 28 presses the outer brake lining to move towards the brake disc; when the disc surface clearance between the brake disc and the outer brake lining 25 is eliminated, the outer brake lining 25 presses the brake disc to form the friction braking action on the other side of the disc surface.

The caliper body 28 and the bracket 21 are connected together through two guide pins 37, and the two form a mechanical structure of a sliding pair, namely, the caliper body 28 can only slide up and down along the direction of the guide pins 37, and the guide pins 37 are fixed on the bracket 21 through bolts.

Example 3

This embodiment is different from embodiment 1 in that: the self-adjusting reed 12 and the plectrum mounting platform 4 are fixedly connected by screws.

Claims (10)

1. A brake with a brake lining capable of returning quickly comprises a caliper body (28), an inner friction lining (24) and an outer friction lining (25), wherein the inner friction lining (24) and the outer friction lining (25) are used for being in contact with a brake disc, a support (21) is mounted on the caliper body (28), a brake opening used for placing the brake disc is formed in one side of the support (21), and the inner friction lining (24) and the outer friction lining (25) move towards the middle of the brake opening under the action of a pressure arm; the method is characterized in that: the support (21) comprises a top plate (22) and a bottom plate (23), the top plate (22) and the bottom plate (23) are located on two sides of a brake opening, the top plate (22) and the bottom plate (23) are respectively provided with an assembly opening (26) used for being matched with an inner friction lining (24) and an outer friction lining (25), the support further comprises a reset reed (27), the reset reed (27) is supported on the inner friction lining (24) and the outer friction lining (25), the reset reed (27) comprises a reed base (1) and a shifting piece (2) installed on the reed base (1) and used for supporting the inner friction piece and the outer friction piece, the four corners of the reed base (1) are respectively provided with the shifting piece (2), and the whole reset reed (27) is in an X shape; the clamp also comprises a pressure plate (20), the reset reed (27) is arranged on the pressure plate (20) to realize positioning, and the pressure plate (20) is fixedly arranged on the clamp body (28).

2. A brake lining quick-return brake as claimed in claim 1, wherein: the clamp comprises a clamp body (28), wherein a slot (29) for assembling a pressing plate (20) is formed in the upper end of the clamp body (28) on the side of a return spring, the opening of the slot (29) faces downwards, the upper end of the pressing plate (20) can be axially inserted into the slot (29), a fixed seat (30) is formed in the lower end of the clamp body (28) on the side of the return spring, a matching opening (41) is formed in the lower end of the pressing plate (20), the matching opening (41) is inserted into the fixed seat (30), a jack penetrating through the fixed seat (30) is formed in the fixed seat (30), the clamp further comprises a locking pin (31), the locking pin (31) penetrates into the jack, the pressing plate (20) is locked on the inner side of the plug, and the two ends of the pressing plate (20) are limited and fixed by the clamp body (28); the middle part of the reset spring base is provided with a limiting opening (10), the limiting opening (10) protrudes out of the reset spring base, the pressing plate (20) is inserted into the limiting opening (10), and the reset spring is limited on the pressing plate (20) through the matching of the limiting opening (10) and the pressing plate (20).

3. A brake lining quick-return brake as claimed in claim 2, wherein: lightening holes (11) are formed in the middle of the reset spring base, limiting arms (9) are arranged on the edges of the lightening holes (11), the number of the limiting arms (9) is two, the limiting arms (9) are arranged in opposite mode, the limiting arms (9) are L-shaped, and limiting openings (10) are formed between the limiting arms (9) and the reset spring base.

4. A brake lining quick-return brake as claimed in claim 1, wherein: the brake pad further comprises a retaining reed (18), a connecting port (19) used for being connected with a brake lining is formed in the retaining reed (18), the connecting port (19) at least comprises 2 connecting ports, a matching lug (32) matched with the connecting port (19) is arranged on each of an inner friction lining (24) and an outer friction lining (25), the matching lug (32) is matched with the connecting port (19), the retaining reed (18) is arranged on each of the inner friction lining (24) and the outer friction lining (25), the two ends of the retaining reed (18) are limited by the inner friction lining or the outer friction lining through the matching of the connecting port (19) and a connecting block, the retaining reed (18) is in a bent state when being arranged on each of the inner friction lining or the outer friction lining, the retaining reed (18) is arched integrally, the arched part of the retaining reed (18) is in the middle position, and the arched part of the retaining reed (18) is abutted against the pressing plate (20).

5. A brake lining quick-return brake as claimed in claim 1, wherein: the reed base (1) comprises a plate body (3) and a plectrum mounting platform (4) arranged at four corners of the plate body (3), the plectrum mounting platform (4) is perpendicular to the reed base (1), the plectrum (2) is fixedly connected with the reed base (1) through the mounting platform, and the plectrum mounting platform (4) is formed by stamping and bending the reed base (1).

6. A brake lining quick-return brake as claimed in claim 2, wherein: the reed base (1) is integrally M-shaped and is in the shape of high middle parts and low two sides, the slot (29) is arranged at the lower position of the middle part of the reed base (1), the pressing plate (20) is arranged at the position of the middle part of the reed base (1), the reed base (1) comprises a flat plate part (5) at the middle part and bending parts (6) at two ends, and a first arc-shaped opening (7) is formed at the connecting transition part of the flat plate part (5) and the bending parts (6).

7. A brake lining quick-return brake as claimed in claim 1, wherein: first strengthening rib (8) are formed on reed base (1) in a punching mode, the middle of reed base (1) outwards protrudes and is provided with at least 2 limiting arms (9), a limiting opening (10) is formed between the two limiting arms (9) and reed base (1), and limiting arm (9) plays a limiting role in limiting the left side, the right side and the outer side boundary of limiting opening (10).

8. A brake lining quick-return brake as claimed in claim 2, wherein: the automatic reed switch is characterized by further comprising self-adjusting reeds (12), wherein the shifting sheet (2) is located at the upper end and the lower end of each self-adjusting reed (12), the number of the self-adjusting reeds (12) is 2, the number of the self-adjusting reeds is respectively arranged at the left end and the right end of the reed base (1), and the self-adjusting reeds (12) are fixedly installed on the shifting sheet installation platform (4); plectrum (2) and self-modulation reed (12) are the integrative structure that the punching press formed, plectrum (2) include backing sheet (13) and backing sheet (13) tip to supporting part (14) that reed base (1) side bending becomes, plectrum (2) whole is "claw" type, the equal punching press of upper end and the lower extreme of self-modulation reed (12) is buckled and is formed with fixed platform (15), self-modulation reed (12) are through fixed platform (15) fixed mounting on plectrum mounting platform (4), fixed platform (15) and plectrum mounting platform (4) are welded fastening connection or can dismantle fixed connection.

9. A brake lining quick-return brake as claimed in claim 6, wherein: the punching press is formed with first strengthening rib (8) on reed base (1), and the number of first strengthening rib (8) is 2, sets up upside and downside at spacing mouthful (10) respectively, and the department of buckling of self-modulation reed (12) and fixed platform (15) is formed with second punching press strengthening rib (16), and the department of buckling forms anti bending arc mouth (17), and the both ends of anti bending arc mouth (17) are supported and are pressed or are fixed on plectrum mounting platform (4).

10. A brake lining quick-return brake as claimed in claim 9, wherein: the pincers body (28) are including the assembly chamber at top, the assembly intracavity is equipped with pressure arm assembly (33), semi-circular bearing (34), supporting seat assembly (36), support (35), install on supporting seat assembly (36) pressure arm assembly (33) and semi-circular bearing (34), support (35) and supporting seat assembly (36) threaded connection, the lower extreme of support (35) is contradicted on the lining pad that rubs including, the upper end in assembly chamber is provided with end cover (40), supporting seat assembly (36) are including return spring (60), return spring (60) other end is contradicted on pincers body (28), the both sides of pincers body (28) are equipped with uide pin (37) shaft hole, uide pin (37) are pegged graft in uide pin (37) shaft hole and with support (21) fixed connection of lower extreme.

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