Parking brake

Abstract

The utility model provides a parking brake, and belongs to the technical field of brakes. The problem that eccentric wear is prone to occurring is solved. The caliper body is connected to the side portion of the mounting base in a front-back sliding mode, a notch is formed in the bottom of the caliper body, an inner side brake lining block and an outer side brake lining block are arranged in the notch, the outer side brake lining block is fixed to the caliper body, the inner side brake lining block is connected with the caliper body in a front-back sliding mode, and the mounting base is provided with a limiting groove. The elastic reset piece comprises two elastic arms which are arranged in the vertical direction and are in a long strip sheet shape and a connecting part integrally and fixedly connected between the two elastic arms, the connecting part is fixed to the limiting groove through a fastener and limited in the limiting groove in the circumferential direction, and the two elastic arms are distributed in the front-back direction. Wherein one elastic arm abuts against the side, facing the outer side brake pad, of the inner side brake pad, and the other elastic arm abuts against the side, facing the inner side brake pad, of the outer side brake pad. The utility model has the advantages of eliminating eccentric wear, reliable structure and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of brake, and relates to a parking brake. BACKGROUND

[0002] The parking brake is a mechanical device for stabilizing vehicles, commonly known as a hand brake, which mainly functions to prevent vehicle sliding or rolling when parking, ensures safe starting on slopes and provides temporary braking support when the driving system fails. For example, the loader pincer disc parking brake with multi-start screw disclosed in patent application No. 201220075369.5 comprises a brake handle, a brake pull wire, an adjusting screw, a rocker arm, a brake pad support (the brake pad support is composed of a left brake pad base and a right brake pad base), a brake disc, a multi-start screw, a torsion spring, a left brake pad, a right brake pad, a bracket, a guide shaft and a rubber spring. The brake pad support is provided with a multi-start thread, the multi-start screw is connected with the brake pad support through the multi-start thread, the rocker arm is composed of a spline and a rocker arm plate, one end of the rocker arm is connected with the multi-start screw through the spline, and the other end is connected with the brake pull wire. The brake pull wire is controlled by the brake handle, the adjusting screw on the brake pull wire is used to adjust the brake stroke, the multi-start screw is provided with a torsion spring, the other end of the torsion spring is in abutment with the right brake pad base, the bracket and the brake pad support are connected through the guide shaft, the rubber spring is sleeved on the guide shaft, the rubber spring is clamped between the bracket and the brake pad support, is located on the left side of the brake pad support, the left brake pad is fixedly connected with the left brake pad base constituting the brake pad support, and the right brake pad is slidably connected with the right brake pad base constituting the brake pad support. During braking, the brake handle is first pulled upward, the brake handle pulls the brake pull wire and makes the rocker arm rotate upward through the rocker arm plate, the multi-start screw is rotated through the spline at the other end of the rocker arm, the multi-start screw rotates inward and moves and pushes the right brake pad to contact the brake disc, after the right brake pad contacts the brake disc, the brake disc gives the right brake pad a reaction force, at the same time, the brake pad support is pushed outward to make the left brake pad contact the brake disc, when the left brake pad and the right brake pad clamp the brake disc, static friction generated when being stressed is achieved, thereby achieving the parking brake effect; when the brake handle returns to the free state, the restoring force of the torsion spring makes the rocker arm rotate downward, the multi-start screw is rotated through the rocker arm, and the clamping force applied on the brake disc is removed.

[0003] However, the loader pincer disc parking brake with multi-start screw has the following defects: after the parking brake is cancelled, although the clamping force applied on the brake disc is removed, the left brake pad and the right brake pad no longer clamp the brake disc, but the brake pad support does not have an automatic return function, so in practice, the left brake pad or the right brake pad will be attached to the brake disc, so that the left brake pad or the right brake pad attached to the brake disc is dry ground during the starting of the vehicle, thereby causing the eccentric wear phenomenon. UTILITY MODEL CONTENTS

[0004] The utility model discloses a parking brake, solves the problem of easy to appear partial wear.

[0005] The utility model discloses a parking brake, solves the problem of easy to appear partial wear.

[0006] A parking brake, including the mounting seat and the gage body with the recess in the bottom along the front and back sliding connection in the mounting seat side, the recess is equipped with the inside brake pad and the outside brake pad along the front and back opposite setting, the outside brake pad is fixed with the gage body, and the inside brake pad is along the front and back sliding connection with the gage body, and it is characterized in that, this parking brake still includes the elastic reset piece, and the mounting seat is equipped with the limit groove, and the elastic reset piece includes two long strip piece shape elastic arms along the vertical direction setting and the connecting portion integrally fixed between two elastic arms, and the connecting portion is fixed in the limit groove through the fastener and is limited in the limit groove along the circumference, and two elastic arms are along the front and back distribution, and the gage body top is equipped with the let groove, and the lower end of two elastic arms all passes through the let groove to the recess, and one of elastic arms leans on the inside brake pad towards the side of the outside brake pad, and the other elastic arm leans on the outside brake pad towards the side of the inside brake pad.

[0007] In the non-braking state, the elastic force of two elastic arms of the elastic reset piece acts on the inside brake pad and the outside brake pad respectively. When braking, the inside brake pad will extrude the corresponding elastic arm and the outside brake pad will extrude the corresponding elastic arm. Because the position of the connecting portion of the elastic reset piece is fixed, that is, the central position of the elastic reset piece always does not change, so after braking, the two elastic arms will reset under the action of their own elastic force. Because the inside brake pad is slidingly connected with the gage body, the outside brake pad is fixed with the gage body and the gage body is slidingly connected with the mounting seat, so under the action of the elastic force of the two elastic arms, the inside brake pad and the outside brake pad will be pushed away from the brake disc at the same time, and the entire parking brake will return to the initial state, thereby preventing the inside brake pad or the outside brake pad from being attached to the brake disc and causing partial wear after braking.

[0008] Moreover, the connecting portion of the elastic reset piece is fixed in the limit groove through the fastener and is limited in the limit groove along the circumference, which can prevent the elastic reset piece from deflecting, and can ensure the circumferential angle of the elastic reset piece, so that the circumferential position of the elastic reset piece does not need to be adjusted during subsequent assembly to ensure the reliable abutment of the elastic arm and the inside brake pad / outside brake pad, and can also prevent the elastic reset piece from deflecting due to vibration during use, so that the elastic arm cannot stably act on the inside brake pad / outside brake pad.

[0009] In the above-mentioned parking brake, the limiting groove is square, the connecting part is a piece in inverted U shape, the connecting part abuts between the front and rear groove walls of the limiting groove, the top of the connecting part is provided with a sleeve hole, the fastener comprises a fastening screw and a locking nut, the elastic reset member is sleeved on the rod part of the fastening screw outside the sleeve hole, the rod part of the fastening screw penetrates out of the mounting seat upward from the limiting groove, and the locking nut is threadedly connected to the part of the fastening screw that penetrates out of the mounting seat.

[0010] In assembly, the connecting part is put into the limiting groove, then the fastening screw is penetrated out of the mounting seat upward from the limiting groove (the rod part of the fastening screw penetrates through the sleeve hole of the connecting part), and then the locking nut is threadedly connected to the part of the fastening screw that penetrates out of the mounting seat, so that the upper end of the connecting part is clamped by the head of the fastening screw and the locking nut to prevent the elastic reset member from falling out of the limiting groove. Moreover, the limiting groove is square, and the connecting part is a piece in U shape, and the connecting part abuts between the front and rear groove walls of the limiting groove, so that the front and rear groove walls of the limiting groove can limit the rotation of the elastic reset member in the limiting groove, and the circumferential angle of the elastic reset member in installation can be well ensured, so that the circumferential position of the elastic reset member does not need to be adjusted in the subsequent assembly process to ensure the reliable abutment of the elastic arms and the inner / outer brake pads, and the deflection of the elastic reset member caused by vibration in use can be prevented to cause the elastic arms to not stably act on the inner / outer brake pads.

[0011] In the above-mentioned parking brake, as another technical solution, the limiting groove is square, and the connecting part is a block.

[0012] The limiting groove is square, and the connecting part is a block with a shape matched with the limiting groove, so that the circumferential angle of the elastic reset member in installation can be well ensured after the connecting part is fixed in the limiting groove, so that the circumferential position of the elastic reset member does not need to be adjusted in the subsequent assembly process to ensure the reliable abutment of the elastic arms and the inner / outer brake pads, and the deflection of the elastic reset member caused by vibration in use can be prevented to cause the elastic arms to not stably act on the inner / outer brake pads.

[0013] In the above-mentioned parking brake, the distance between the two elastic arms in the front-rear direction gradually increases from top to bottom, and the lower end of the two elastic arms is bent to form an abutment part, and the distance between the two abutment parts in the front-rear direction remains unchanged from top to bottom.

[0014] The distance between the two elastic arms in the front-rear direction gradually increases from top to bottom, so that the two elastic arms and the connecting portion form obvious bending portions, ensuring that the two elastic arms have stable elastic force. Meanwhile, the lower end portions of the two elastic arms are bent to form abutting portions, and the distance between the two abutting portions in the front-rear direction remains unchanged from top to bottom. One elastic arm abuts against the outer brake pad through the abutting portion, and the other elastic arm abuts against the inner brake pad through the abutting portion, so that sufficient contact area is ensured, and the elastic force can be stably applied to the inner brake pad and the outer brake pad.

[0015] In the above-mentioned parking brake, the side of the inner brake pad facing the outer brake pad is provided with a matching groove one, and the side of the outer brake pad facing the inner brake pad is provided with a matching groove two. The abutting portion of one elastic arm is located in the matching groove one and abuts against the groove bottom wall of the matching groove one, and the abutting portion of the other elastic arm is located in the matching groove two and abuts against the groove bottom wall of the matching groove two.

[0016] Through the above-mentioned arrangement, it can be ensured that the two elastic arms do not contact the brake disc when the parking brake is working, and the normal fitting of the outer brake pad / inner brake pad and the brake disc is not affected by the arrangement of the elastic arms.

[0017] In the above-mentioned parking brake, the mounting seat comprises a base plate and a bracket fixedly connected to the side of the base plate through a mounting screw, and the clamp body and the elastic reset member are connected to the bracket.

[0018] The mounting seat of the existing parking brake only comprises a base plate, and the parking brake adds a bracket on the basis of the base plate, and the clamp body and the elastic reset member are connected to the bracket. In this way, the clamp body, the elastic reset member and the bracket can be combined into an assembly during assembly, and then the assembly can be fixedly connected to the side of the base plate through the mounting screw. In particular, such an arrangement can better ensure the stability of the cooperation between the elastic reset member and the inner brake pad / outer brake pad.

[0019] In the above-mentioned parking brake, the bracket comprises a main body in the shape of a long block in the left-right direction and two connecting feet respectively protrudingly arranged at the bottom of the left and right ends of the main body, the two connecting feet are each provided with a guide hole in the front-rear direction, a limiting groove is arranged at the bottom of the main body, the clamp body comprises a main clamp body and a secondary clamp body fixedly connected, the outer brake pad is fixed to the secondary clamp body, the inner brake pad is slidingly connected to the main clamp body, a guide sliding pin is arranged in each of the two guide holes, and the two ends of the guide sliding pin are fixed to the main clamp body and the secondary clamp body, respectively.

[0020] In the process of assembly, the two guide sliding pins are respectively arranged in the two guide holes, and then the auxiliary clamp body and the main clamp body are arranged on the front and back sides of the guide sliding pins and fixedly connected, so that the auxiliary clamp body and the main clamp body are fixed together to form the clamp body, and the two ends of the guide sliding pins are respectively inserted into the main clamp body and the auxiliary clamp body, so that the clamp body can slide on the bracket along the front and back directions, and the clamp body cannot fall off the bracket as a whole.

[0021] In the above-mentioned parking brake, the two ends of the guide hole are respectively provided with a positioning step one, the two ends of the guide sliding pin are respectively provided with a positioning step two, and the two ends of the guide sliding pin are respectively provided with a rubber dust cover, wherein the two ends of one rubber dust cover are respectively fixed at the positioning step one and the positioning step two on one side, and the two ends of the other rubber dust cover are respectively fixed at the positioning step one and the positioning step two on the other side.

[0022] Through the above-mentioned arrangement, the part of the guide sliding pin that extends out of the connecting hole is closed, so that impurities cannot be stuck on the guide sliding pin to cause the clamp body to not smoothly slide during braking.

[0023] Compared with the prior art, the parking brake has the following advantages:

[0024] 1. The elastic return member is connected to the mounting seat, two elastic arms of the elastic return member extend into the recess and abut against the inner brake pad and the outer brake pad respectively, and when the braking is released, the inner brake pad and the outer brake pad are simultaneously pushed away from the brake disc by the elastic force of the two elastic arms, so that the parking brake returns to the initial state, thereby preventing the inner brake pad or the outer brake pad from being abutted on the brake disc to cause uneven wear after the braking is completed.

[0025] 2. The connecting part of the elastic return member is fixed in the limiting groove by the fastener and is circumferentially limited in the limiting groove, which can prevent the elastic return member from being deflected, and can well ensure the circumferential angle of the elastic return member, so that the circumferential position of the elastic return member does not need to be adjusted in the subsequent assembly process to ensure the reliable abutment of the elastic arms and the inner brake pad / outer brake pad, and the elastic arms can stably act on the inner brake pad / outer brake pad without being deflected due to vibration during use. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a perspective view of the parking brake.

[0027] Figure 2 is a sectional view of the parking brake.

[0028] Figure 3 is a perspective view of the bracket.

[0029] Figure 4 is Figure 3 is a sectional view along A-A in Fig.

[0030] Figure 5 is Figure 3 is a sectional view along B-B in Fig.

[0031] Figure 6 is an exploded schematic view at the bracket.

[0032] Figure 7 is a three-dimensional schematic view of the elastic reset member in Embodiment One.

[0033] In the figure, 1, mounting seat; 1a, base plate; 1b, bracket; 1b1, main body; 1b11, limiting groove; 1b2, connecting foot; 2, plier body; 2a, notch; 2b, accommodation groove; 2c, main plier body; 2d, auxiliary plier body; 3, inner side brake pad; 3a, matching groove one; 4, outer side brake pad; 4a, matching groove two; 5, multi-head screw rod; 6, push block; 7, rocker arm; 8, return torsion spring; 9, limiting shaft; 10, connecting column one; 11, blocking nut; 12, acting spring; 13, connecting column two; 14, fastening nut; 15, elastic reset member; 15a, connecting part; 15a1, sleeving hole; 15b, elastic arm; 15b1, abutting part; 16, fastening member; 16a, fastening screw; 16b, locking nut; 17, guiding sliding pin; 18, rubber dust cover; 19, mounting screw; 20, connecting screw. DETAILED DESCRIPTION

[0034] The following is a specific embodiment of the present application and further describes the technical solution of the present application in combination with the accompanying drawings, but the present application is not limited to these embodiments.

[0035] Embodiment One

[0036] As Figures 1-6As shown, a parking brake includes a mounting seat 1 and a jaw body 2 connected to the side of the mounting seat 1 in a front-rear sliding manner, the bottom of the jaw body 2 is provided with a notch 2a, and the notch 2a is provided with an inner brake pad 3 and an outer brake pad 4, the inner brake pad 3 and the outer brake pad 4 are arranged in a front-rear opposite manner, the outer brake pad 4 is fixed to the jaw body 2, and the inner brake pad 3 is connected to the jaw body 2 in a front-rear sliding manner. A multi-start screw 5 is threadedly connected to the jaw body 2 in a front-rear direction, a push block 6 is fixedly connected to the side of the inner brake pad 3 away from the outer brake pad 4, one end of the multi-start screw 5 abuts against the push block 6, the other end of the multi-start screw 5 extends out of the jaw body 2 and is fixedly connected with a rocker arm 7 at the end of the multi-start screw 5, a return torsion spring 8 is arranged outside the jaw body 2 and is fixedly connected with a limiting shaft 9 in a front-rear direction outside the jaw body 2, the limiting shaft 9 is located on the same side of the jaw body 2 as the rocker arm 7, and the two ends of the return torsion spring 8 are connected to the rocker arm 7 and the limiting shaft 9 respectively. In this embodiment, two connecting columns one 10 are integrally and fixedly connected to the side of the inner brake pad 3 away from the outer brake pad 4, the two connecting columns one 10 are arranged in a left-right manner, the two connecting columns one 10 extend out of the jaw body 2 and are respectively threadedly connected with a blocking nut 11, the part of the two connecting columns one 10 extending out of the jaw body 2 is sleeved with an action spring 12, and the two ends of the two action springs 12 abut against the jaw body 2 and the corresponding blocking nut 11 respectively; two connecting columns two 13 are integrally and fixedly connected to the side of the outer brake pad 4 away from the inner brake pad 3, the two connecting columns two 13 are arranged in a left-right manner, the two connecting columns two 13 extend out of the jaw body 2 and are respectively threadedly connected with a fastening nut 14, and the part of the jaw body 2 through which the connecting columns two 13 pass abuts against the outer brake pad 4 and the fastening nut 14 in a front-rear direction.

[0037] The action of the parking brake in braking is the same as that of the prior art, the brake disc is located between the inner brake pad 3 and the outer brake pad 4, in braking, the rocker arm 7 is rotated by the pulling force of the air cylinder or the pull rope and drives the multi-start screw 5 to rotate, the multi-start screw 5 moves and pushes the inner brake pad 3 to contact the brake disc while rotating. Because the position of the brake disc in the front-rear direction does not change, and the multi-start screw 5 is continuously moving, the brake disc forms a reaction force on the inner brake pad 3, and the jaw body 2 moves and makes the outer brake pad 4 also contact the brake disc. When the inner brake pad 3 and the outer brake pad 4 simultaneously clamp the brake disc, the friction force formed clamps the brake disc to achieve parking brake. When the parking brake is cancelled, the rocker arm 7 is no longer pulled by the air cylinder or the pull rope, at this time, the rocker arm 7 is reset to rotate under the action of the return torsion spring 8 and drives the multi-start screw 5 to rotate (if the rotating direction of the rocker arm 7 in braking is counterclockwise, then the resetting rotating direction is clockwise), so that the clamping force applied to the brake disc is removed.

[0038] Further, as shown in FIG. 2, Figure 2 and Figure 7As shown, the parking brake further comprises an elastic reset member 15, the mounting base 1 is provided with a limiting groove 1b11, the elastic reset member 15 comprises two elastic arms 15b in the shape of long strips arranged along the vertical direction and a connecting portion 15a integrally connected between the two elastic arms 15b, the connecting portion 15a is fixed in the limiting groove 1b11 by a fastener 16 and the connecting portion 15a is limited in the limiting groove 1b11 along the circumferential direction. The two elastic arms 15b are distributed along the front and back directions, the top of the caliper body 2 is provided with a letting-in groove 2b, the lower ends of the two elastic arms 15b pass through the letting-in groove 2b into the notch 2a, one of the elastic arms 15b abuts against one side of the inner brake pad 3 facing the outer brake pad 4, and the other elastic arm 15b abuts against one side of the outer brake pad 4 facing the inner brake pad 3.

[0039] In the unbraked state, the elastic forces of the two elastic arms 15b of the elastic reset member 15 act on the inner brake pad 3 and the outer brake pad 4 respectively. When braking, the inner brake pad 3 will press the corresponding elastic arm 15b and the outer brake pad 4 will press the corresponding elastic arm 15b. Because the position of the connecting portion 15a of the elastic reset member 15 is fixed, that is, the central position of the elastic reset member 15 does not change all the time, so after braking, the two elastic arms 15b will reset at the same time under the action of their own elastic force. Because the inner brake pad 3 is in sliding connection with the caliper body 2, the outer brake pad 4 is fixed with the caliper body 2 and the caliper body 2 is in sliding connection with the mounting base 1, so under the action of the elastic force of the two elastic arms 15b, the inner brake pad 3 and the outer brake pad 4 will be pushed away from the brake disc at the same time, and the whole parking brake will return to the initial state, thereby preventing the inner brake pad 3 or the outer brake pad 4 from sticking to the brake disc and causing uneven wear after braking. Moreover, the connecting portion 15a of the elastic reset member 15 is fixed in the limiting groove 1b11 by the fastener 16 and the connecting portion 15a is limited in the limiting groove 1b11 along the circumferential direction, which can prevent the elastic reset member 15 from deflecting, and can well ensure the circumferential angle of the elastic reset member 15, so that the circumferential position of the elastic reset member 15 does not need to be adjusted in the subsequent assembly process to ensure the reliable abutment of the elastic arms 15b and the inner brake pad 3 / outer brake pad 4, and it can also prevent the elastic reset member 15 from deflecting due to vibration during use so that the elastic arms 15b cannot stably act on the inner brake pad 3 / outer brake pad 4.

[0040] Specifically, as shown in FIG. 1, Figure 2 and Figure 7As shown, the distance between the two elastic arms 15b in the front-rear direction gradually increases from top to bottom, and the lower end of the two elastic arms 15b is bent to form an abutting portion 15b1, and the distance between the two abutting portions 15b1 in the front-rear direction remains unchanged from top to bottom. The inner side brake pad 3 is provided with a matching groove one 3a on the side facing the outer side brake pad 4, and the abutting portion 15b1 of one of the elastic arms 15b is located in the matching groove one 3a and abuts against the groove bottom wall of the matching groove one 3a; the outer side brake pad 4 is provided with a matching groove two 4a on the side facing the inner side brake pad 3, and the abutting portion 15b1 of the other elastic arm 15b is located in the matching groove two 4a and abuts against the groove bottom wall of the matching groove two 4a. The limiting groove 1b11 is square, the connecting portion 15a is in the shape of an inverted U-shaped sheet, the connecting portion 15a abuts between the front and rear groove walls of the limiting groove 1b11, and the distance between the two arms of the connecting portion 15a gradually decreases from top to bottom. The top of the connecting portion 15a is provided with a sleeve hole 15a1, the fastener 16 includes a fastening screw 16a and a locking nut 16b, the elastic return member 15 is sleeved outside the rod portion of the fastening screw 16a through the sleeve hole 15a1, the rod portion of the fastening screw 16a passes out of the mounting seat 1 upward and the locking nut 16b is threadedly connected to the portion of the fastening screw 16a passing out of the mounting seat 1. In practice, the entire elastic return member 15 is bent from one metal sheet.

[0041] Further, as Figures 2-6As shown, the mounting base 1 comprises a base plate 1a and a bracket 1b fixedly connected to the side of the base plate 1a by mounting screws 19, and the clamp body 2 and the elastic reset member 15 are both connected to the bracket 1b. The clamp body 2 comprises a main clamp body 2c and a secondary clamp body 2d fixedly connected together, the outer side brake pad 4 is fixed to the secondary clamp body 2d, the inner side brake pad 3 is slidingly connected to the main clamp body 2c, the multi-head screw 5, the rocker arm 7, the return torsion spring 8 and the limiting shaft 9 are all arranged on the main clamp body 2c, and the notches 2a and the clearance grooves 2b are formed after the main clamp body 2c and the secondary clamp body 2d are fixedly connected together; the bracket 1b comprises a main body 1b1 in the shape of a long block along the left-right direction and two connecting feet 1b2 respectively protrudingly arranged at the bottom of the left and right ends of the main body 1b1, the two connecting feet 1b2 are both provided with guide holes along the front-rear direction, the limiting grooves 1b11 are arranged at the bottom of the main body 1b1, the guide sliding pins 17 are both arranged in the two guide holes, and the two ends of the guide sliding pins 17 are respectively fixed to the main clamp body 2c and the secondary clamp body 2d. The two end openings of the guide holes are both provided with positioning steps one, the two ends of the guide sliding pins 17 are both provided with positioning steps two, and the two ends of the guide sliding pins 17 are both provided with rubber dustproof sleeves 18, wherein the two ends of one of the rubber dustproof sleeves 18 are respectively fixed to the positioning steps one and the positioning steps two on one side, and the two ends of the other rubber dustproof sleeve 18 are respectively fixed to the positioning steps one and the positioning steps two on the other side. The two rubber dustproof sleeves 18 make the part of the guide sliding pins 17 extending out of the connecting holes be closed, so that impurities cannot be stuck on the guide sliding pins 17 to cause the clamp body 2 to be unable to smoothly slide during braking.

[0042] Embodiment two

[0043] The structure and principle of this embodiment are basically the same as those of embodiment one, and the difference lies in that in this embodiment, the connecting part 15a is in the shape of a block, and the shape of the connecting part 15a matches the limiting grooves 1b11.

[0044] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. A parking brake comprising a mounting base (1) and a caliper body (2) connected to the side of the mounting base (1) in a front-rear sliding manner and having a recess (2a) in the bottom, the recess (2a) being provided with an inner brake pad (3) and an outer brake pad (4) arranged opposite to each other in a front-rear direction, the outer brake pad (4) being fixed to the caliper body (2) and the inner brake pad (3) being connected to the caliper body (2) in a front-rear sliding manner, characterized in that, The parking brake further comprises an elastic reset member (15), the mounting seat (1) is provided with a limiting groove (1b11), the elastic reset member (15) comprises two elastic arms (15b) in the shape of long strips arranged along the vertical direction and a connecting portion (15a) integrally connected between the two elastic arms (15b), the connecting portion (15a) is fixed to the limiting groove (1b11) through a fastener (16), and the connecting portion (15a) is circumferentially limited in the limiting groove (1b11); the two elastic arms (15b) are distributed along the front and back directions; the top of the clamp body (2) is provided with a letting groove (2b), and the lower ends of the two elastic arms (15b) all pass through the letting groove (2b) into the notch (2a); one of the elastic arms (15b) abuts against one side of the inner brake pad (3) facing the outer brake pad (4), and the other elastic arm (15b) abuts against one side of the outer brake pad (4) facing the inner brake pad (3).

2. A parking brake according to claim 1, wherein, The limiting groove (1b11) is square, the connecting portion (15a) is in the shape of an inverted U-shaped strip, the connecting portion (15a) abuts against the groove walls between the front and back sides of the limiting groove (1b11), the top of the connecting portion (15a) is provided with a sleeving hole (15a1), the fastener (16) comprises a fastening screw (16a) and a locking nut (16b), the elastic reset member (15) is sleeved on the rod portion of the fastening screw (16a) through the sleeving hole (15a1), the rod portion of the fastening screw (16a) passes out of the mounting seat (1) upward from the limiting groove (1b11), and the locking nut (16b) is threadedly connected to the portion of the fastening screw (16a) passing out of the mounting seat (1).

3. A parking brake according to claim 1, wherein, The limiting groove (1b11) is square, the connecting portion (15a) is in the shape of a block, and the shape of the connecting portion (15a) matches the limiting groove (1b11).

4. A handbrake according to claim 2 or 3, wherein, The distance between the two elastic arms (15b) along the front and back directions gradually increases from top to bottom, and the lower ends of the two elastic arms (15b) are bent to form abutting portions (15b1), and the distance between the two abutting portions (15b1) along the front and back directions remains unchanged from top to bottom.

5. A parking brake according to claim 4, wherein, The side of the inner brake pad (3) facing the outer brake pad (4) is provided with a matching groove one (3a), the side of the outer brake pad (4) facing the inner brake pad (3) is provided with a matching groove two (4a), the abutting portion (15b1) of one of the elastic arms (15b) is located in the matching groove one (3a) and abuts against the groove bottom wall of the matching groove one (3a), and the abutting portion (15b1) of the other elastic arm (15b) is located in the matching groove two (4a) and abuts against the groove bottom wall of the matching groove two (4a).

6. A parking brake according to claim 2 or 3, wherein The mounting seat (1) comprises a base plate (1a) and a bracket (1b) fixedly connected to the side of the base plate (1a) through a mounting screw (19), and the clamp body (2) and the elastic reset member (15) are both connected to the bracket (1b).

7. A parking brake according to claim 6 wherein, The bracket (1b) comprises a main body (1b1) in the shape of a long block in the left-right direction and two connecting feet (1b2) respectively protrudingly arranged at the bottom of the left and right ends of the main body (1b1), the two connecting feet (1b2) are each provided with a guide hole in the front-rear direction, a limiting groove (1b11) is arranged at the bottom of the main body (1b1), the forceps body (2) comprises a main forceps body (2c) and a secondary forceps body (2d) fixedly connected, the outer side brake pad (4) is fixed to the secondary forceps body (2d), the inner side brake pad (3) is slidingly connected to the main forceps body (2c), a guide sliding pin (17) is arranged in each of the two guide holes, and the two ends of the guide sliding pin (17) are fixed to the main forceps body (2c) and the secondary forceps body (2d) respectively.

8. A parking brake according to claim 7, wherein, The two ends of the guide hole are each provided with a positioning step one, the two ends of the guide sliding pin (17) are each provided with a positioning step two, the two ends of the guide sliding pin (17) are each provided with a rubber dustproof sleeve (18), and the two ends of one rubber dustproof sleeve (18) are fixed at the positioning step one and the positioning step two on one side, and the two ends of the other rubber dustproof sleeve (18) are fixed at the positioning step one and the positioning step two on the other side.

Images