A brake and brake block assembly

Abstract

The present invention provides a brake and a brake block assembly, belonging to the technical field of brakes. It solves the problem that the positioning of the brake block assembly in the existing brake makes it inconvenient to replace the wheel hub disc assembly. The brake includes a brake block assembly and a caliper body, the caliper body includes a mounting portion fixed to the brake block assembly, the brake block assembly includes a back plate, the back of the back plate is abutted against the inner side of the mounting portion, the back of the back plate has a protruding bump, the mounting portion has a positioning surface for supporting the bump, a pressure plate is detachably fixed on the top of the mounting portion to keep the bump against the positioning surface, a positioning groove is provided on the inner side of the mounting portion, the positioning groove penetrates the top surface of the mounting portion toward the top direction of the mounting portion and forms an entrance, and a positioning block is also provided on the back of the back plate that matches the positioning groove, and the positioning block can be inserted into and removed from the positioning groove through the entrance. The brake structure can facilitate the replacement of the wheel hub disc assembly while positioning the brake block assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of brakes and relates to a brake and a brake block assembly. Background Art

[0002] The braking system refers to a system that forcibly reduces the speed of a sports device. On a vehicle, braking is usually performed by brakes, which include disc brakes and drum brakes. Disc brakes are also called disc brakes, and drum brakes are also called drum brakes. Floating caliper disc brakes are widely used in automobiles due to their advantages such as fast heat dissipation and light weight. The floating caliper disc brake includes a transmission mechanism, a bracket, and a caliper body disposed on the bracket. The bracket is provided with a sliding pin, which passes through the sliding pin hole on the caliper body. The transmission mechanism is connected to the brake pad disposed on the caliper body. Sometimes the caliper body and the components connected to the caliper body are collectively referred to as a brake caliper assembly.

[0003] The bracket is sometimes called a support. Commonly used supports include a car disc brake support disclosed in Chinese patent literature [application number: CN 201510136515.9; publication number: CN 104776134 A]: comprising a symmetrical curved beam, with support heads symmetrically arranged at both ends of the curved beam, a circular hole arranged at the upper part of the support head, and three bolt holes arranged at the lower part. The two support heads arranged opposite to each other are connected by a side edge plate, and the support forms an enclosing structure, and the braking part of the brake disc is located between the two curved beams and is surrounded by the support.

[0004] The inner brake pad assembly and the outer brake pad assembly are placed on the top of the two curved beams, respectively. The inner brake pad assembly and the outer brake pad assembly are located on the inner side and the outer side of the brake disc, respectively. The brake disc is fixed to the wheel hub through a flange structure, and the wheel hub is fixed to the axle of the car through a bearing. The brake disc and the wheel hub form a hub disc assembly. The brake caliper assembly is fixed to the suspension through a bracket. The positional relationship between the suspension and the axle is fixed, and the installation space between the brake caliper assembly and the brake disc is limited. Since the braking part of the brake disc is surrounded by the bracket, the bracket forms restrictions on the inner side, the outer side and the two radial sides of the braking part of the brake disc. When removing and replacing the hub disc assembly, the brake caliper assembly can only be removed from the suspension to allow the hub disc assembly to have enough space to be removed from the axle. Removing the brake caliper assembly means removing the bracket. After removing the bracket, the bracket needs to be repositioned when it is re-fixed, which makes it inconvenient to remove and replace the hub disc assembly.

[0005] Since the bracket restricts the replacement of the wheel hub assembly, canceling the bracket is a way to solve the problem. Chinese patent literature has disclosed a disc brake caliper assembly without a bracket [application number: CN201020511920.7, announcement number: CN 201858286 U], including a caliper body, a piston arranged in the caliper body, an inner brake pad assembly pushed by the piston, and an outer brake pad assembly pushed by the caliper body, the inner brake pad assembly includes a friction block I and a back plate I arranged between the friction block I and the piston, and the outer brake pad assembly includes a friction block II and a back plate II arranged between the friction block II and the caliper body. A limiting boss is arranged on the back plate II, and a limiting hole corresponding to the limiting boss is arranged on the caliper body, and the limiting boss is inserted into the limiting hole.

[0006] The outer brake pad assembly is sometimes called the brake pad assembly, and the inner brake pad assembly is sometimes called the paired brake pad assembly. The bracket is eliminated in the above-mentioned brake caliper assembly, and the outer brake pad assembly is fixedly connected to the caliper body through the limiting boss and the limiting hole. There is no bracket structure on the outside of the brake disc to restrict the removal and replacement of the hub disc assembly, which reduces the restrictions on the removal and replacement of the hub disc assembly in the radial space. However, since the limiting boss and the limiting hole form an annular limit, when the hub disc assembly and the brake caliper assembly are not separated, the outer brake pad assembly cannot be removed from the caliper body to make axial space for the removal of the hub disc assembly. In this way, it is still necessary to disassemble the entire brake caliper assembly before removing the hub disc assembly. Summary of the invention

[0007] The purpose of the present invention is to solve the above problems in the prior art and to propose a brake and brake pad assembly, which solves the technical problem of how to facilitate the removal and replacement of the hub disc assembly while positioning the brake pad assembly.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] A brake comprises a brake pad assembly for cooperating with the outer side surface of a brake disc for braking and a caliper body capable of spanning the brake disc, the caliper body comprising a mounting portion fixed to the brake pad assembly, the brake pad assembly comprising a back plate, the back side of the back plate being abutted against the inner side surface of the mounting portion, the back side of the back plate having a protruding bump, characterized in that the mounting portion has a positioning surface for supporting the bump, a pressure plate is detachably fixed on the top of the mounting portion for keeping the bump against the positioning surface, a positioning groove is provided on the inner side surface of the mounting portion, the positioning groove penetrates the top surface of the mounting portion toward the top direction of the mounting portion and forms an entrance, the back side of the back plate also has a positioning block cooperating with the positioning groove, and the positioning block can be inserted into and removed from the positioning groove through the entrance.

[0010] When installing the brake pad assembly, insert the back plate of the brake pad assembly from the top of the caliper body, insert the positioning block into the positioning groove through the entrance, and the back of the back plate abuts against the inner side of the mounting portion. Then fix the pressure plate on the top of the mounting portion so that the bottom surface of the protrusion remains against the positioning surface. After the positioning block is embedded in the positioning groove, the side walls of the positioning groove located on both sides of the positioning block form circumferential positioning with the back plate, the inner side of the mounting portion forms an axial limit with the back plate, and the positioning surface, the protrusion and the pressure plate form radial positioning with the back plate, so that the brake pad assembly is positioned and installed on the caliper body. The brake pad assembly is located on the outside of the brake disc. When disassembling the brake pad assembly, first remove the pressure plate from the mounting portion, then remove the back plate from the top of the caliper body, and remove the positioning block from the positioning groove through the entrance. After the brake pad assembly is taken out, there is an axial replacement space between the brake disc and the mounting portion, and there is no bracket structure in the bottom space of the mounting portion, so that there is more radial replacement space between the brake disc and the caliper body that was originally occupied by the bracket structure, so that the wheel hub disc assembly can be removed from the axle without removing the brake, thereby facilitating the replacement of the wheel hub disc assembly. The positioning block is arranged on the back plate, and the positioning groove is arranged on the inner side of the mounting portion and the entrance is arranged on the top of the mounting portion. The positioning groove can cooperate with the positioning block to realize the positioning of the brake pad assembly, and can avoid the arrangement of components that hinder the replacement of the wheel hub disc assembly on the inner side of the mounting portion, thereby facilitating the replacement of the wheel hub disc assembly while realizing positioning. This brake structure can facilitate the replacement of the wheel hub disc assembly while positioning the brake pad assembly.

[0011] In the above brake, the positioning groove penetrates the bottom surface of the mounting portion toward the bottom direction of the mounting portion and forms an outlet.

[0012] The outlet is arranged so that the side wall of the positioning groove will not interfere with the radial positioning of the back plate, thereby ensuring that the protrusion on the back plate is supported on the positioning surface of the mounting portion, so that the radial positioning of the back plate is stable.

[0013] In the above brake, the top of the positioning block is located at the inlet or extends out of the inlet, and the bottom of the positioning block extends out of the outlet.

[0014] The top of the positioning block is located at the entrance or extends out of the entrance, and the bottom of the positioning block extends out from the outlet, so that the positioning block has good shear resistance performance, ensuring that the back plate can withstand the tangential shear force when the brake block assembly contacts the brake disc for braking, so that the circumferential positioning of the brake block assembly on the mounting portion is stable.

[0015] In the above brake, there is a gap between the positioning block and the bottom surface of the positioning groove.

[0016] The setting of the gap can avoid interference between the positioning block and the bottom surface of the positioning groove, thereby ensuring that the back plate is axially positioned against the inner side surface of the mounting portion, making the axial positioning of the brake block assembly stable, and can prevent friction and wear between the positioning block and the bottom surface of the positioning groove when the back plate and the mounting portion move relative to each other, reducing the resistance of the brake block assembly during disassembly and assembly on the caliper body, making it easy to disassemble and assemble the brake block assembly from the caliper body, and the smooth removal of the brake block assembly also makes it easy to disassemble and replace the wheel hub assembly.

[0017] In the above brake, there are two positioning blocks respectively located on both sides of the protrusion. This arrangement ensures that the back plate and the mounting portion are positioned stably, and that the back plate is evenly stressed when the brake block assembly contacts the brake disc for braking, thereby ensuring the braking effect of the brake block assembly.

[0018] In the above brake, the positioning block and the convex block are arranged separately, or the positioning block and the convex block are directly connected and a clearance groove is arranged at the connection between the positioning block and the convex block.

[0019] Since the protrusion is used for radial positioning of the back plate, and the positioning block is used for circumferential positioning of the back plate, the positioning block and the protrusion are separately arranged to reduce the parts causing installation interference, so that the positioning of the brake block assembly is stable and easy to disassemble. The positioning block is directly connected to the protrusion, which can improve the structural strength between the positioning block and the protrusion, improve their shear resistance, and make the brake block assembly structure stable. The setting of the clearance groove can reduce the installation interference caused by the connection between the two, so that the positioning of the brake block assembly is stable and easy to disassemble.

[0020] In the above-mentioned brake, a large recess is arranged at the inner edge of the top of the mounting portion, a small recess is recessed on the bottom surface of the large recess, the bottom surface of the small recess is the positioning surface, the protrusion is located in the small recess, and the top of the protrusion extends out of the large recess.

[0021] The setting of the large notch and the small notch can, on the one hand, reduce the weight of the caliper body, and on the other hand, enable the brake pad assembly to have a suitable installation height to cooperate with the brake disc for braking, and enable the bottom of the back plate to protrude from the bottom surface of the mounting portion, making it convenient to eject the brake pad assembly during disassembly.

[0022] In the above brake, the bottom of the back plate protrudes from the bottom surface of the mounting portion. On the one hand, when the brake block assembly is disassembled, the brake block assembly can be pushed out from the bottom of the back plate, which is convenient for disassembly of the brake block assembly. On the other hand, after the brake assembly is removed from the mounting portion, there is enough radial replacement space between the mounting portion and the brake disc, which is conducive to the smooth removal of the hub disc assembly.

[0023] In the above brake, the top surface of the back plate is provided with protrusions on both sides of the protrusion, and an elastic pressure strip that arches away from the top surface of the back plate is fixed between the two protrusions, and the pressure plate abuts against the top of the elastic pressure strip. The elastic pressure strip deforms after being stressed and exerts pressure on the back plate, so that the protrusion is stably abutted against the positioning surface, so that the radial positioning of the brake block assembly is stable.

[0024] In the above brake, the top surface of the protrusion is flush with the top surface of the back plate, which improves the radial shear resistance of the protrusion, improves the structural strength of the protrusion, and ensures the service life of the brake pad assembly.

[0025] In the above-mentioned brake, the brake also includes a bracket and a matching brake pad assembly for cooperating with the inner side of the brake disc for braking, the top of the bracket has a positioning groove, the matching brake pad assembly is located in the positioning groove, the pressure plate acts on the matching brake pad assembly to keep the matching brake pad assembly against the bottom surface of the positioning groove, the matching brake pad assembly can be inserted into and removed from the positioning groove through the top of the caliper body, the bracket has fixing parts on both sides respectively, the front side of the fixing part has a matching surface that can be opposite to the brake disc, and the edge of the fixing part does not protrude from the matching surface.

[0026] The bracket is slidably connected to the caliper body, and the bracket is fixedly connected to the suspension through the fixing part. When installing the matching brake block assembly, the matching brake block assembly is inserted into the positioning groove from the top of the caliper body, and the matching brake block assembly is pressed against the bottom surface of the positioning groove by the pressure plate to realize radial positioning, and the two side walls of the positioning groove face the matching brake block assembly to realize circumferential positioning. When disassembling the matching brake block assembly, the pressure plate is removed, and then the matching brake block assembly is taken out from the top of the caliper body. After the matching brake block assembly is taken out of the positioning groove, the positioning groove provides a certain replacement space for the replacement of the wheel hub disc assembly. In addition, since the edge of the fixing part does not protrude from the mating surface, the bracket does not restrict the brake disc on the radial side, thereby reducing the interference of the bracket structure on the assembly and disassembly of the wheel hub disc assembly, so that the operation of replacing the wheel hub disc assembly can be realized without removing the bracket, so that the wheel hub disc assembly can be easily replaced. Moreover, the structure of the bracket only has the part located on the inner side of the brake disc, which can also reduce the weight of the brake compared with the existing bracket, which is conducive to achieving lightweight of the car.

[0027] In the above brake, at least one of the fixing parts has a protruding limit block on its outer side, and the caliper body is provided with at least one protrusion corresponding to the limit block, and the protrusion is arranged opposite to the front side of the limit block.

[0028] The floating position of the caliper body is limited by setting a limit block to prevent the caliper body from sliding excessively and affecting the stability of the brake structure, thereby making the brake work stably. In the above brake, the reverse side of the fixing part has a protruding mounting boss, and a positioning plane is arranged on the mounting boss.

[0029] When installing the brake, the positioning plane of the bracket is placed against the suspension for positioning, and then the bracket is fixed to the suspension by bolts on the suspension. The bracket is fixed to the suspension, and the brake disc is fixed to the axle. The positional relationship between the axle and the suspension is fixed, so that the positional relationship between the bracket and the brake disc is fixed. Since the positioning plane is located on the mounting boss, and the mounting boss is protruding, the position of the bracket is accurately installed, so that the positional relationship between the bracket and the brake disc is accurate, ensuring that there is a designed sufficient replacement space between the bracket and the brake disc after actual assembly, which is conducive to the convenient replacement of the hub disc assembly.

[0030] A brake block assembly is installed on a caliper body of a brake, the caliper body includes a mounting portion, the brake block assembly includes a back plate that can be abutted against the inner side surface of the mounting portion, and the back surface of the back plate is provided with a protrusion that can be supported on the mounting portion. It is characterized in that a positioning groove is provided on the inner side surface of the mounting portion, the positioning groove penetrates the top surface of the mounting portion toward the top direction of the mounting portion and forms an entrance, and the back surface of the back plate is also provided with a positioning block that can cooperate with the positioning groove, and the positioning block can be inserted into and removed from the positioning groove through the entrance.

[0031] The brake block assembly can be positioned radially by the protrusion and the mounting portion, axially limited by the back of the back plate and the mounting portion, and circumferentially positioned by the positioning block and the mounting portion, so that the brake block assembly can be positioned on the caliper body. The positioning block can be inserted into and removed from the positioning groove from the entrance, so that the positioning block can cooperate with the positioning groove to achieve the positioning of the brake block assembly, and the positioning block assembly can be removed from the caliper body to free up axial replacement space, thereby preventing the brake block assembly from obstructing the replacement of the hub disk assembly, thereby achieving positioning while facilitating the replacement of the hub disk assembly. This positioning brake block assembly can be positioned on the caliper body while facilitating the replacement of the hub disk assembly.

[0032] In the above brake block assembly, the top surface of the protrusion is flush with the top surface of the back plate, and the bottom surface of the positioning block is flush with the bottom surface of the back plate.

[0033] The top surface of the bump is flush with the top surface of the back plate, which improves the radial shear resistance of the bump and the structural strength of the bump. The bottom surface of the positioning block is flush with the bottom surface of the back plate, which improves the circumferential shear resistance of the positioning block and the structural strength of the positioning block, thereby ensuring the service life of the brake block assembly.

[0034] In the above brake block assembly, the positioning block and the convex block are arranged separately, or the positioning block and the convex block are directly connected and a clearance groove is arranged at the connection between the positioning block and the convex block.

[0035] Since the protrusion is used for radial positioning of the back plate, and the positioning block is used for circumferential positioning of the back plate, the positioning block and the protrusion are separately arranged to reduce the parts causing installation interference, so that the positioning of the brake block assembly is stable and easy to disassemble. The positioning block is directly connected to the protrusion, which can improve the structural strength between the positioning block and the protrusion, improve their shear resistance, and make the brake block assembly structure stable. The setting of the clearance groove can reduce the installation interference caused by the connection between the two, so that the positioning of the brake block assembly is stable and easy to disassemble.

[0036] In the above brake block assembly, there are two positioning blocks, which are respectively located on both sides of the protrusion. This arrangement ensures that the back plate and the mounting portion are positioned stably, and that the back plate is evenly stressed when the brake block assembly contacts the brake disc for braking, thereby ensuring the braking effect of the brake block assembly.

[0037] Compared with the prior art, the present invention has the following advantages:

[0038] A positioning surface is provided on the mounting portion of the caliper body, and the convex block of the back plate is pressed against the positioning surface through a pressure plate. The back plate is circumferentially positioned through the positioning groove on the inner side surface of the mounting portion and the positioning block on the back plate, and the positioning groove is provided with an entrance at the top of the mounting portion, and the positioning block can be inserted and removed from the positioning groove through the entrance, so that the positioning of the brake block assembly is achieved while facilitating the removal and replacement of the wheel hub assembly. The positioning groove is provided with an exit at the bottom of the mounting portion, and there is a gap between the positioning block and the bottom surface of the positioning groove, so that the positioning of the brake block assembly is stable and easy to disassemble and assemble. The bracket is only provided with a structure located on the inner side of the brake disc, which reduces the weight of the brake and is also conducive to facilitating the removal and replacement of the wheel hub assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a three-dimensional diagram of the first embodiment of the brake Figure 1 ;

[0040] Figure 2 It is a three-dimensional diagram of the first embodiment of the brake Figure 2 ;

[0041] Figure 3 is an exploded perspective view of the first embodiment of the brake;

[0042] Figure 4 is a positional relationship diagram between the first embodiment of the brake and the brake disc;

[0043] Figure 5 is a schematic diagram of the process of disassembling the hub disc assembly on the first embodiment of the brake;

[0044] Figure 6is a three-dimensional diagram of the brake block assembly after the elastic pressure strip is hidden in the first embodiment of the brake;

[0045] Figure 7 is a three-dimensional diagram of the bracket in the first embodiment of the brake;

[0046] Figure 8 It is a partial stereoscopic diagram of the positioning of the mounting portion and the brake pad assembly in the first embodiment of the brake;

[0047] Fig. 9 is an exploded perspective view of the second embodiment of the brake;

[0048] Fig.10 It is a three-dimensional diagram of the brake block assembly after the elastic pressure strip is hidden in the second embodiment of the brake.

[0049] In the figure, 1, caliper body; 1a, mounting portion; 1a1, large notch; 1a2, small notch; 1a3, positioning surface; 1a4, positioning groove; 1a5, entrance; 1a6, exit; 1b, transmission portion; 1c, bridging portion; 1c1, protrusion one; 1c2, protrusion two; 1d, opening; 2, brake pad assembly; 2a, back plate; 2a1, protrusion; 2a2, positioning block; 2a3, gap; 2a4, protrusion; 2a5, make way groove; 2b, friction block; 2c, elastic pressure strip; 3, matching brake pad assembly; 4, pressure plate; 5, bracket; 5a, positioning groove; 5b, fixing portion; 5b1, matching surface; 5b2, mounting boss; 5b3, positioning plane; 5b4, limit block; 6, brake disc; 7, wheel hub; 8, axle. DETAILED DESCRIPTION

[0050] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0051] Embodiment 1

[0052] like Figure 1-Figure 8As shown, a brake comprises a caliper body 1 capable of crossing a brake disc 6, a brake pad assembly 2 for cooperating with the outer side surface of the brake disc 6 for braking, a matching brake pad assembly 3 for cooperating with the inner side surface of the brake disc 6 for braking, and a bracket 5. The caliper body 1 comprises a mounting portion 1a fixed to the brake pad assembly 2, a transmission portion 1b connected to the bracket 5, and a bridge portion 1c located between the mounting portion 1a and the transmission portion 1b. The mounting portion 1a and the transmission portion 1b are respectively located on the outer side and the inner side of the brake disc 6, and the bridge portion 1c is located on the outer peripheral side of the brake disc 6. The brake pad assembly 2 is fixedly connected to the inner side surface of the mounting portion 1a, a transmission mechanism is installed in the transmission portion 1b, the matching brake pad assembly 3 is connected to the transmission mechanism, and the bracket 5 is slidably connected to the transmission portion 1b. A sliding pin is fixedly connected to the pin hole of the bracket 5, a sliding pin hole is provided on the transmission portion 1b, and the sliding pin is inserted into the sliding pin hole. An opening 1d is provided on the top surface of the bridging portion 1c and passes through the bottom surface of the bridging portion 1c. The circumferential width of the opening 1d is greater than the circumferential width of the brake pad assembly 2. The circumferential width of the opening 1d is greater than the circumferential width of the mating brake pad assembly 3. The opening 1d extends axially to the mounting portion 1a and the transmission portion 1b, so that the brake pad assembly 2 and the mating brake pad assembly 2 can be inserted and removed through the opening 1d.

[0053] The top of the bracket 5 is provided with a positioning groove 5a, and the paired brake block assembly 3 is positioned in the positioning groove 5a. The paired brake block assembly 3 can be inserted into and removed from the positioning groove 5a through the top opening 1d of the caliper body 1. The bracket 5 has a fixing portion 5b on both sides, and the front of the fixing portion 5b has a matching surface 5b1 that can be opposite to the brake disc 6, and the edge of the fixing portion 5b does not protrude from the matching surface 5b1. The fixing portion 5b has a mounting boss 5b2 protruding from the edge of the fixing portion 5b on the side opposite to the matching surface 5b1, and a positioning plane 5b3 is provided on the mounting boss 5b2. There is an arched beam between the two fixing portions 5b, and the arched beam is located at the bottom of the positioning groove 5a. Avoidance recesses are provided between the bottom surface of the positioning groove 5a and the two side wall surfaces of the positioning groove 5a, and the avoidance recesses include a first groove provided on the side wall surface of the positioning groove 5a and a second groove provided on the bottom surface of the positioning groove 5a. The groove wall surface of the first groove is an arc surface, the bottom surface of the second groove is a plane, the side wall surface of the second groove is an arc surface, and the groove wall surface of the first groove and the side wall surface of the second groove have an arc transition. The matching surface 5b1 includes a matching plane, and the matching plane is arranged parallel to the positioning plane 5b3. A protruding reinforcing boss is arranged at the avoidance recess of the positioning groove 5a on the matching plane, and the top of the reinforcing boss extends to the top side of the bracket 5, and the inner side of the reinforcing boss extends to the arched beam. After the reinforcing boss is arranged, the matching surface 5b1 also includes a side of the reinforcing boss facing the brake disc 6, which is a plane and is arranged parallel to the matching plane.

[0054] At least one of the fixed parts 5b has a protruding stopper 5b4 on its outer side, the front side of the stopper 5b4 does not protrude from the mating surface 5b1, and the back side of the stopper 5b4 does not protrude from the back side of the fixed part 5b. Preferably, the mating surface 5b1 protrudes from the front side of the stopper 5b4, and the back side of the fixed part 5b protrudes from the back side of the stopper 5b4. At least one protrusion 1c1 and a protrusion 2c2 corresponding to the stopper 5b4 are provided on the bridge part 1c of the caliper body 1. The stopper 5b4 is located between the protrusion 1c1 and the protrusion 2c2. The protrusion 1c1 is arranged opposite to the front side of the stopper 5b4, and the protrusion 2c2 is arranged opposite to the back side of the stopper 5b4. By setting the stopper 5b4, the floating position of the caliper body 1 is limited to avoid excessive sliding of the caliper body 1 affecting the stability of the brake structure, thereby making the brake work stably. In some brakes, the protrusion 2c2 can also be omitted.

[0055] The brake block assembly 2 includes a back plate 2a abutting against the inner side of the mounting portion 1a, and a protruding bump 2a1 is provided on the side of the back plate 2a abutting against the mounting portion 1a, i.e., the back side of the back plate 2a, and the top surface of the bump 2a1 is flush with the top surface of the back plate 2a. The number of bumps 2a1 can be one or more, and is set as required. A friction block 2b is fixed on the side of the back plate 2a opposite to the mounting portion 1a, i.e., the front side of the back plate 2a, and the friction block 2b can contact the brake disc 6 for braking. The mounting portion 1a has a positioning surface 1a3 for supporting the bump 2a1, and the bottom surface of the bump 2a1 abuts on the positioning surface 1a3. A large recess 1a1 is provided at the inner edge of the top surface of the mounting portion 1a, and a small recess 1a2 is provided on the bottom surface of the large recess 1a1. The bottom surface of the small recess 1a2 is a positioning surface 1a3, and the projection 2a1 is embedded in the small recess 1a2 and the top of the projection 2a1 extends out of the large recess 1a1. A strip-shaped positioning groove 1a4 is provided on the inner side surface of the mounting portion 1a, and the two side walls of the positioning groove 1a4 are arranged in parallel, and the positioning groove 1a4 is arranged perpendicular to the positioning surface 1a3, that is, the two side walls of the positioning groove 1a4 are arranged perpendicular to the positioning surface 1a3. The positioning groove 1a4 penetrates the bottom surface of the large recess 1a1 toward the top direction of the mounting portion 1a and forms an entrance 1a5. The back surface of the back plate 2a also has a strip-shaped positioning block 2a2 that matches the positioning groove 1a4, and the positioning block 2a2 can be inserted into and removed from the positioning groove 1a4 through the entrance 1a5. The positioning block 2a2 is embedded in the positioning groove 1a4, and the two side surfaces of the positioning block 2a2 are arranged in parallel. The two side surfaces of the positioning block 2a2 are respectively abutted against the two side walls of the positioning groove 1a4, and the top of the positioning block 2a2 of the positioning block 2a2 is located at the entrance 1a5 or extends out of the entrance 1a5. There is a gap 2a3 between the back surface of the positioning block 2a2 and the bottom surface of the positioning groove 1a4, and the back surface of the positioning block 2a2 is arranged in parallel with the bottom surface of the positioning groove 1a4. The bottom of the back plate 2a protrudes from the bottom surface of the mounting portion 1a, and the positioning groove 1a4 penetrates the bottom surface of the mounting portion 1a toward the bottom direction of the mounting portion 1a and forms an outlet 1a6, and the bottom of the positioning block 2a2 extends out of the outlet 1a6, and the bottom surface of the positioning block 2a2 is flush with the bottom surface of the back plate 2a. The bottom surface of the positioning block 2a2 and the two side surfaces of the positioning block 2a2 have a rounded transition, so that the positioning block 2a2 is easy to be embedded from the entrance 1a5 into the positioning groove 1a4. The positioning block 2a2 is arranged separately from the protrusion 2a1, and there are two positioning blocks 2a2, which are respectively located on both sides of the protrusion 2a1. The number of the positioning blocks 2a2 can be increased or decreased according to the quantity.

[0056] A pressure plate 4 is detachably fixed on the top of the caliper body 1, one end of the pressure plate 4 is inserted into the transmission part 1b, and the other end of the pressure plate 4 is fixedly connected to the top surface of the mounting part 1a by bolts. Alternatively, the two ends of the pressure plate 4 are respectively fixedly connected to the transmission part 1b and the mounting part 1a by bolts. The pressure plate 4 acts on the paired brake block assembly 3 to keep the paired brake block assembly 3 against the bottom surface of the positioning groove 5a, and the pressure plate 4 acts on the brake block assembly 2 to keep the protrusion 2a1 against the positioning surface 1a3. On the top of the back plate 2a, protrusions 2a4 are respectively provided on both sides of the protrusion 2a1, and an elastic strip 2c that arches away from the top surface of the back plate 2a is fixed between the two protrusions 2a4, and the pressure plate 4 is against the top of the elastic strip 2c.

[0057] When installing the brake pad assembly 2 and the matching brake pad assembly 3, insert the back plate 2a of the brake pad assembly 2 through the top opening 1d of the caliper body 1, and embed the positioning block 2a2 into the positioning groove 1a4 through the opening 1d, the back plate 2a is against the inner side surface of the mounting portion 1a, and the protrusion 2a1 is embedded into the small recess 1a2 and abuts against the positioning surface 1a3; insert the matching brake pad assembly 3 from the top opening 1d of the caliper body 1, and insert it into the positioning groove 5a of the bracket 5, the bottom surface of the matching brake pad assembly 3 abuts against the bottom surface of the positioning groove 5a, and the transmission mechanism is connected to the matching brake pad assembly 2; then fix the pressure plate 4 on the top of the caliper body 1, and under the action of the pressure plate 4, the bottom surface of the protrusion 2a1 remains against the positioning surface 1a3, and the matching brake pad assembly 3 remains against the bottom surface of the positioning groove 5a. The cooperation between the positioning groove 1a4 and the positioning block 2a2 forms circumferential positioning for the back plate 2a, the inner side of the mounting portion 1a forms an axial limit for the back plate 2a, and the positioning surface 1a3, the protrusion 2a1 and the pressure plate 4 form radial positioning for the back plate 2a, so that the brake pad assembly 2 is positioned and installed on the caliper body 1.

[0058] The brake is fixedly connected to the suspension through the fixing portion 5b of the bracket 5, the brake disc 6 is fixedly connected to the wheel hub 7 through the flange structure, the wheel hub 7 is fixedly connected to the axle 8 through the inner bearing and the outer bearing, and the brake disc 6 and the wheel hub 7 constitute a wheel hub assembly. Figure 4 and Figure 5 As shown, the wheel hub assembly can be disassembled without removing the bracket 5. When disassembling the wheel hub assembly, first remove the pressure plate 4 from the caliper body 1; then take out the brake block assembly 2 through the opening 1d at the top of the caliper body 1, and the positioning block 2a2 is separated from the positioning groove 1a4, and the matching brake block assembly 3 is taken out from the positioning groove 5a of the bracket 5 through the opening 1d at the top of the caliper body 1; then take out the inner ring of the outer bearing between the wheel hub 7 and the axle 8, and then move the wheel hub assembly outward and downward for a certain distance to separate the inner ring and outer ring of the inner bearing between the wheel hub 7 and the axle 8, and then take out the wheel hub assembly along the axle 8 while continuously tilting the wheel hub assembly. When installing the wheel hub assembly, the operation can be reversed.

[0059] During the process of replacing the wheel hub disc assembly, after the brake pad assembly 2 is taken out, an axial replacement space is provided between the brake disc 6 and the mounting portion 1a, and there is no bracket 5 structure in the bottom space of the mounting portion 1a, so that there is an additional radial replacement space between the brake disc 6 and the caliper body 1 that was originally occupied by the bracket 5 structure. At the same time, since the edge of the fixing portion 5b of the bracket 5 does not protrude from the mating surface 5b1, the bracket 5 does not restrict the brake disc 6 on the radial side. In addition, the positioning block 2a2 is arranged on the back plate 2a, and the positioning groove 1a4 is arranged on the inner side of the mounting portion 1a and the opening 1d is arranged on the top of the mounting portion 1a. The positioning groove 1a4 can cooperate with the positioning block 2a2 to realize the positioning of the brake block assembly 2, and can avoid setting a component that hinders the removal and replacement of the wheel hub disc assembly on the inner side of the mounting portion 1a. Therefore, there are no other protruding structures on the bottom and both sides of the mounting portion 1a that will hinder the removal and installation of the brake disc 6. The structure of the mounting portion 1a also increases the radial removal and replacement space and axial removal and replacement space of the wheel hub disc assembly, so that the wheel hub disc assembly can be removed from the axle 8 without removing the brake, thereby making the wheel hub disc assembly easy to remove and replace. The brake structure can make the wheel hub disc assembly easy to remove and replace while positioning the brake block assembly 2.

[0060] In the above description, the entire wheel hub disc assembly is removed from the axle 8. Of course, in the actual disassembly process, the fixing state of the wheel hub 7 and the brake disc 6 can be released first, and then the wheel hub 7 is removed from the axle 8, and then the brake disc 6 is removed from the axle 8 according to the disassembly method of the wheel hub disc assembly.

[0061] Embodiment 2

[0062] like Fig. 9 and Fig.10 As shown, the positions of the positioning block 2a2 and the positioning groove 1a4 are different from those in the first embodiment, and the other structures are the same as those in the first embodiment. The positioning block 2a2 is directly connected to the protrusion 2a1, and a clearance groove 2a5 is provided at the connection between the positioning block 2a2 and the protrusion 2a1, and the entrance 1a5 of the positioning groove 1a4 is connected to the small notch 1a2.

[0063] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A brake, comprising a brake pad assembly (2) for cooperating with the outer side surface of a brake disc (6) for braking, and a caliper (1) capable of straddling the brake disc (6), the caliper (1) comprising a mounting portion (1a) fixed to the brake pad assembly (2), the brake pad assembly (2) comprising a back plate (2a), the back surface of the back plate (2a) being in contact with the inner side surface of the mounting portion (1a), and the back surface of the back plate (2a) having a protruding bump (2a1), characterized in that: The mounting portion (1a) has a positioning surface (1a3) for supporting the protrusion (2a1), a pressing plate (4) is detachably fixed on the top of the mounting portion (1a) for keeping the protrusion (2a1) against the positioning surface (1a3), a positioning groove (1a4) is provided on the inner side surface of the mounting portion (1a), the positioning groove (1a4) penetrates the top surface of the mounting portion (1a) toward the top of the mounting portion (1a) and forms an entrance (1a5), and the back surface of the back plate (2a) also has a positioning groove (1a4) which is aligned with the positioning groove (1a3). 4) a matching positioning block (2a2), the positioning block (2a2) being capable of being inserted into and removed from the positioning groove (1a4) through the entrance (1a5), a large notch (1a1) being provided at the inner edge of the top of the mounting portion (1a), a small notch (1a2) being recessed on the bottom surface of the large notch (1a1), the bottom surface of the small notch (1a2) being the positioning surface (1a3), the convex block (2a1) being located in the small notch (1a2), and the top of the convex block (2a1) extending out of the large notch (1a1).

2. The brake according to claim 1, characterized in that The positioning groove (1a4) penetrates the bottom surface of the mounting portion (1a) in the direction of the bottom of the mounting portion (1a) and forms an outlet (1a6).

3. The brake according to claim 2, characterized in that The top of the positioning block (2a2) is located at the inlet (1a5) or extends out of the inlet (1a5), and the bottom of the positioning block (2a2) extends out of the outlet (1a6).

4. The brake according to any one of claims 1 to 3, characterized in that: There is a gap (2a3) between the positioning block (2a2) and the bottom surface of the positioning groove (1a4).

5. The brake according to any one of claims 1 to 3, characterized in that: The brake further comprises a bracket (5) and a matching brake block assembly (3) for cooperating with the inner side surface of a brake disc (6) for braking. The top of the bracket (5) comprises a positioning groove (5a). The matching brake block assembly (3) is located in the positioning groove (5a). The pressure plate (4) acts on the matching brake block assembly (3) to keep the matching brake block assembly (3) against the bottom surface of the positioning groove (5a). The matching brake block assembly (3) can be inserted into and removed from the positioning groove (5a) through the top of the caliper body (1). The bracket (5) has fixing portions (5b) on both sides respectively. The front surface of the fixing portion (5b) comprises a matching surface (5b1) that can be opposite to the brake disc (6). The edge of the fixing portion (5b) does not protrude from the matching surface (5b1).

6. The brake according to claim 5, characterized in that At least one of the fixing portions (5b) has a protruding limit block (5b4) on its outer side, and the clamp body (1) is provided with a protrusion 1 (1c1) corresponding to the limit block (5b4) at at least one location, the protrusion 1 (1c1) being arranged opposite to the front side of the limit block (5b4).

7. A brake block assembly mounted on a brake caliper body (1), the caliper body (1) comprising a mounting portion (1a), the brake block assembly (2) comprising a back plate (2a) capable of abutting against an inner side surface of the mounting portion (1a), a convex block (2a1) capable of supporting the mounting portion (1a) being arranged on the back surface of the back plate (2a), characterized in that: A positioning groove (1a4) is provided on the inner side surface of the mounting portion (1a), the positioning groove (1a4) penetrates the top surface of the mounting portion (1a) towards the top direction of the mounting portion (1a) and forms an entrance (1a5), the back surface of the back plate (2a) also has a positioning block (2a2) capable of cooperating with the positioning groove (1a4), the positioning block (2a2) can be inserted into and removed from the positioning groove (1a4) through the entrance (1a5), a large notch (1a1) is provided at the inner edge of the top of the mounting portion (1a), a small notch (1a2) is recessed on the bottom surface of the large notch (1a1), the bottom surface of the small notch (1a2) is a positioning surface (1a3), the convex block (2a1) can be inserted into the small notch (1a2) and abut against the positioning surface (1a3), and the top of the convex block (2a1) extends out of the large notch (1a1).

8. The brake pad assembly according to claim 7, characterized in that: The top surface of the protrusion (2a1) is flush with the top surface of the back plate (2a), and the bottom surface of the positioning block (2a2) is flush with the bottom surface of the back plate (2a).

9. The brake pad assembly according to claim 7 or 8, characterized in that: The positioning block (2a2) and the convex block (2a1) are arranged separately, or the positioning block (2a2) and the convex block (2a1) are directly connected, and a clearance groove (2a5) is arranged at the connection between the positioning block (2a2) and the convex block (2a1).

Images