Disc brake

Abstract

The invention relates to the field of brakes, and discloses a disc brake which comprises a support, a brake block and a return reed. The support is used for being fixedly installed on a vehicle body and providing space for installation of the brake block and the return reed at the same time; the brake block comprises a back plate and friction plates, and during braking, the inner friction plate and the outer friction plate are attached to the brake disc to achieve braking of a vehicle; the return reed is used as a connecting piece, is fixedly arranged on the bracket and is used for supporting the brake block at the same time; in the braking process, the return reed deforms to accumulate elastic potential energy; and when the brake is released, the deformation is released to drive the brake block to return. The brake has the advantages of being reliable in braking, stable in returning and long in service life.

Description

Technical Field

[0001] The present invention relates to the field of brakes, in particular to disc brakes. Background Art

[0002] Chinese patent application document CN219623115U - low drag electronic brake caliper and electronic parking brake, which is used in the electronic parking brake, is equipped with a return spring for the friction plate. After the braking is completed, the return spring can cause the friction plate to return to its original position, which can correspondingly improve driving comfort and extend the life of the friction plate and brake disc.

[0003] However, this type of brake block return structure has only a single C-shaped ring structure to absorb deformation energy. Due to its long overall length, the C-shaped ring has a large degree of deformation when absorbing energy, and is prone to decay after long-term use. In addition, it is directly bent from the root to form the above structure, and then deformed by force and bent back and forth, resulting in the bending root being subjected to back and forth bending force for a long time, greatly shortening its service life. In addition, this structure has limited clamping force and support force, and the friction block has average stability.

[0004] Moreover, the clamp body and the bracket structure designed therein have poor stability and are heavy, which is not conducive to lightweighting. The installation of the spring and the bracket or the clamp body is also very inconvenient, and the installation stability is also poor. Summary of the invention

[0005] The present invention aims at solving the disadvantages in the prior art and provides a disc brake.

[0006] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0007] A disc brake, including a bracket, a brake pad and a return spring;

[0008] The bracket is used for fixed installation on the vehicle body and provides space for the installation of brake pads and return springs;

[0009] The brake pad includes a back plate and a friction plate. During braking, the inner friction plate and the outer friction plate fit with the brake disc to brake the vehicle.

[0010] The return spring is fixedly mounted on the bracket as a connecting piece and supports the brake block at the same time; during the braking process, the return spring will deform and accumulate elastic potential energy; when the brake is released, the deformation will be released to drive the brake block to return.

[0011] Preferably, limiting ears are provided on both sides of the brake block, and the bracket includes a space for placing the disc brake, which is defined as the braking space, the inner side of the braking space is the inner bracket, and the outer side is the outer bracket; installation grooves are provided on both sides of the inner bracket and the outer bracket, and the installation grooves are used to install return springs, and one side surface of the installation groove is formed by an isolated fixing block; the other side surface of the installation groove is formed by a limiting block.

[0012] Preferably, the return spring includes a mounting seat portion and a clamping portion; a coordinate system is defined, the axial direction is the z direction, the jaws and the back of the jaws are the x direction, and the direction perpendicular to the z direction and the x direction is the y direction;

[0013] The mounting seat portion includes a guide groove arranged in the z direction, the guide groove facing the y direction; wherein the guide groove is installed in the mounting groove and is adapted to the shape of the mounting groove;

[0014] The clamping part is bent from the root of the guide surface and enters the guide groove, and the bending sequentially forms an axially extending extension part, a transition part, an elastic part and a clamping part.

[0015] Preferably, the two sides of the guide groove are respectively a first side plate and a second side plate, a limiting portion is extended from one side of the first side plate, and a fixing portion is extended from one side of the second side plate, the limiting portion and the fixing portion both extend in the x direction and the extension directions are opposite, the first side plate, the second side plate and the guide surface form a guide groove structure; the fixing portion forms a fixing cavity, the fixing cavity and the fixing block cooperate, the fixing cavity is surrounded by elastic spring sheets, and the elastic spring sheets are clamped on the outer side of the fixing block; the limiting portion is attached to the limiting block.

[0016] Preferably, the limiting portion is L-shaped, and the limiting portion, the fixing portion, the mounting portion and the clamping portion are all formed by integrally bending the spring sheet.

[0017] Preferably, a platform is formed at the intersection of the extension portion and the transition portion, the transition portion is an arc-shaped groove, the axial direction of the arc-shaped groove is at an acute angle with the horizontal line, the horizontal line is a line intersecting the axial line of the arc-shaped groove and perpendicular to the extension direction of the guide groove; the lateral length of the transition portion is smaller than the width of the elastic portion; the side of the arc-shaped groove connected to the elastic portion is connection portion one, and the side connected to the platform is connection portion two, the connecting part between connection portion one and connection portion two is an arc-shaped portion, connection portion one, connection portion two and the tail of the arc-shaped portion form a notch, the notch faces the extension portion, and the edge line of the notch is an arc line.

[0018] Preferably, the elastic portion includes a first bending portion and a second bending portion, and the first bending portion and the second bending portion are bent in the Z direction as a whole, and are bent in the y direction at the same time as bending in the z direction to form a curved structure; the first bending portion is a U-shaped structure, which includes a sheet one integral with the connecting portion, a sheet two connected to the second bending portion, and a sheet three connecting the sheet one and the sheet two to form an arc structure, the sheet one and the sheet two are parallel, and the U-shaped structure is facing the area formed in the y direction and the z direction, and the overall direction is toward the direction of the guide groove and biased downward.

[0019] Preferably, the second bending portion forms a C-shaped limit opening, the C-shaped limit opening is facing the area formed in the y direction and the z direction, and is away from the guide groove and biased upward; the extension portion is formed by bending a rectangular spring sheet, which includes a sheet four in the z direction and a sheet five formed by bending the tail of the sheet four, the sheet five is bent in the z direction and the y direction, the sheet four and the sheet five form an L-shaped structure, the width of the sheet four and the sheet five is the same, and is smaller than the width of the transition portion and the elastic portion; the projection of the extension portion in the y direction does not overlap with the projection of the transition portion and the elastic portion in the y direction, and the width of the projection area formed by the two in the y direction is less than or equal to the width of the guide groove.

[0020] Preferably, the clamping portion includes a clamping arm, a limiting claw is extended from the end of the clamping arm, and the interval formed by the limiting portion and the elastic portion is used to limit and restrict the brake block, wherein the extension direction of the limiting claw is the y direction away from the guide groove; wherein the extension direction of the extension portion in the z direction is the direction away from the root of the guide surface and forms the farthest point of the clamping portion in the z direction away from the root, and the extension direction of the transition portion, the elastic portion and the clamping portion in the z direction is opposite to the extension direction of the extension portion in the z direction.

[0021] Preferably, it further comprises a caliper body, which is fixedly mounted on the bracket, and the brake formed by the caliper body and the bracket is a floating caliper.

[0022] Compared with the prior art, this solution has the following advantages. This solution is designed through the overall design. First, an S-shaped structure is used for support in the elastic return part, so that it can withstand deformation forces in multiple directions and multiple fulcrums. Secondly, the U-shaped structure and the C-shaped structure in the S-shaped structure are designed so that the borne force is directed downward on one hand and transmitted to the tail end of the U-shaped structure on the other hand. Since the tail end of the U-shaped structure is upturned, it can not only deform in the z-direction to absorb the elastic force, but also absorb the elastic force in the y-direction. At the same time, the force on the transition part is small, thereby extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the brake.

[0024] Figure 2 It is a schematic diagram of the structure of the bracket.

[0025] Figure 3It is a schematic diagram of the structure of the brake pad.

[0026] Figure 4 It is a schematic diagram of the overall structure of the return reed.

[0027] Figure 5 It is a schematic diagram of the overall structure of the return reed.

[0028] Figure 6 It is a schematic diagram of the overall structure of the return reed.

[0029] Figure 7 It is a schematic diagram of the overall structure of the return reed.

[0030] The technical names of the accompanying drawings are: 1-mounting seat part, 2-clamping part, 3-guide groove, 4-guide surface, 5-extension part, 6-transition part, 7-elastic part, 8-clamping part, 9-platform, 10-connecting part one, 11-connecting part two, 12-arc-shaped part, 13-recess, 14-first bending part, 15-second bending part, 16-piece one, 17-piece two, 18-piece three, 19-piece four, 20-piece five, 21-clamping arm, 22-limiting part, 23-first side plate, 24-second side plate, 25-limiting part, 26-fixing part, 31-bracket, 32-brake block, 33-return spring leaf, 34-limiting ear, 35-brake space, 36-mounting groove, 37-limiting block, 38-fixing block, 39-caliper body. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] Example 1

[0033] The disc brake comprises a bracket 31, a brake block 32 and a return spring 33;

[0034] The bracket 31 is used for fixed installation on the vehicle body and provides space for the installation of the brake block 32 and the return spring 33; the bracket 31 is a C-shaped structure as a whole, which includes inner and outer brackets, and an arc-shaped opening is formed in the middle for placing the brake disc.

[0035] The brake block 32 includes a back plate and a friction plate. During braking, the inner friction plate and the outer friction plate fit with the brake disc to brake the vehicle. The inner brake block is pushed by the brake piston, and the other brake block is driven by the bracket to move relative to the caliper body 39. The braking process in this embodiment is the braking principle of a floating caliper.

[0036] The return spring 33 is an integrally formed spring structure in the present embodiment, and is fixedly mounted on the bracket 31 as a connecting piece, while supporting the brake block 32; during the braking process, the return spring 33 will deform to accumulate elastic potential energy; when the brake is released, the deformation will release and drive the brake block 32 to return.

[0037] Specifically, in this embodiment, the brake block 32 is provided with limiting ears 34 on both sides, the bracket 31 includes a space for placing the disc brake, which is defined as a brake space 35, the inner side of the brake space 35 is the inner bracket 31, and the outer side is the outer bracket 31; both sides of the inner bracket 31 and the outer bracket 31 are provided with mounting grooves 36, and the mounting grooves 36 are used to install the return spring 33, and one side of the mounting groove 36 is formed by an isolated fixing block 38; the other side of the mounting groove 36 is formed by a limiting block 37. The mounting groove 36 is an axially arranged through groove structure.

[0038] The return spring 33 includes a mounting seat portion 1 and a clamping portion 2; a coordinate system is defined, the axial direction is the z direction, the jaw and the back direction of the jaws are the x direction, and the y direction is perpendicular to the z direction and the x direction; wherein the up, down, left, right, front, and back in this article are represented by Figure 1 For reference, up and down are the z-axis direction, front and back are the y-direction, and left and right are the x-direction.

[0039] The mounting seat part 1 comprises a guide groove 3 arranged in the z direction, and the guide groove 3 faces the y direction;

[0040] The clamping portion 2 is bent from the root of the guide surface 4 and enters the guide groove 3, and is bent to form an axially extending extension portion 5, a transition portion 6, an elastic portion 7 and a clamping portion 8 in sequence. Specifically, the mounting seat portion 1 and the clamping portion 2 are formed by bending an integral spring sheet, the cross section of the guide groove 3 is a U-shaped structure, the root is the lower end of the guide surface 4, and the clamping portion 2 extends from the lower end of the guide surface 4 and then bends to form the above structure.

[0041] Due to the limitations of the bending direction and structural structure of the clamping part 2 in this solution, it is necessary to first design the shape of the clamping part 2 before bending. The shape is determined by the problems faced when bending into the above-mentioned clamping part 2.

[0042] The first is the space problem, followed by the bending force problem, as well as the stress concentration problem and whether the operation is convenient.

[0043] Therefore, the shape of the clamping portion 2 is designed as follows. The intersection of the extension portion 5 and the transition portion 6 forms a platform 9. Specifically, in this embodiment, the platform 9 is a plate structure, which is horizontal or slightly raised. The transverse and longitudinal dimensions of the plate are larger than the width of the extension portion 5 and the transition portion 6. The larger platform 9 can withstand a larger deformation and meet different bending requirements, leaving a larger deformation area. Secondly, the transition portion 6 is an arc groove, and the angle between the axis direction of the arc groove and the horizontal line is an acute angle. The horizontal line is a line that intersects the axis of the arc groove and is perpendicular to the extension direction of the guide groove 3; because the transition portion 6 is arranged obliquely as a whole, the transverse length of the transition portion 6 is less than the width of the elastic portion 7.

[0044] In this embodiment, the side of the arc groove connected to the elastic part 7 is the connecting part 10, and the side connected to the platform 9 is the connecting part 2 11. The connecting part between the connecting part 10 and the connecting part 2 11 is the arc part 12. The connecting part 10, the connecting part 2 11 and the tail of the arc part 12 form a notch 13, and the notch 13 faces the extension part 5. The side line of the notch 13 is an arc line.

[0045] The elastic part 7 includes a first bending part 14 and a second bending part 15. The first bending part 14 and the second bending part 15 are bent in the Z direction as a whole, and are bent in the y direction at the same time as they are bent in the z direction to form a curved structure; the first bending part 14 is a U-shaped structure, which includes a sheet 16 integrated with the connecting part 10, a sheet 2 17 connected to the second bending part 15, and a sheet 3 18 connecting the sheet 16 and the sheet 2 17 to form an arc structure. The sheet 16 and the sheet 2 17 are parallel, and the U-shaped structure is oriented toward the y direction and the area formed in the z direction. The overall direction is oriented toward the guide groove 3 and is biased downward. The first bending part 14 plays a major role in deformation. It is relatively long and has a certain inclination angle, so that the sheet 16 not only applies deformation force in the z direction, but also transmits deformation force to the tail, so that the entire first bending part 14 can receive and withstand deformation force, avoiding the problem of stress concentration caused by force at a single position.

[0046] In this embodiment, the second bending portion 15 forms a C-shaped limit opening, which faces the area formed by the y direction and the z direction, and faces away from the guide groove 3 and upwards. The tangent lines at both ends of the C direction are roughly in a right angle structure.

[0047] The extension part 5 is formed by bending a rectangular spring sheet, which includes a sheet 19 in the z direction and a sheet 20 formed by bending the tail of the sheet 19. The sheet 20 is bent in the z direction and the y direction. The sheet 19 and the sheet 20 form an L-shaped structure. The widths of the sheet 19 and the sheet 20 are the same and smaller than the widths of the transition part 6 and the elastic part 7. The sheet 19 of the extension part 5 structure provides deformation space for the subsequent transition part 6 and the elastic part 7, and the final clamping position can be confirmed as needed to meet the needs of various products.

[0048] In this embodiment, in order to avoid stress concentration during the bending process and ensure that the clamping portion 2 is deformed in the z-direction and the y-direction during the entire force-bearing process, wherein deformation mainly occurs in the z-direction, the projection of the extension portion 5 in the y-direction does not overlap with the projection of the transition portion 6 and the elastic portion 7 in the y-direction, and the width of the projection area formed by the two in the y-direction is less than or equal to the width of the guide groove 3.

[0049] The clamping part 8 includes a clamping arm 21, and a limiting claw 22 is extended from the end of the clamping arm 21. The interval formed by the limiting part 25 and the elastic part 7 is used to limit and restrict the limiting ear 34. The upper and lower sides of the limiting ear axial direction are limited by the limiting part 25 and the elastic part 7. The leading direction of the limiting claw 22 is the y direction away from the guide groove 3. The main body angle of the limiting claw 22 and the clamping arm 21 is an acute angle, so that it can be conveniently buckled on the brake block 32. The inclined sheet 5 can also perform the compensation function of the brake.

[0050] In this embodiment, the extension direction of the extension portion 5 in the z direction is the direction away from the root of the guide surface 4 and forms the farthest point of the clamping portion 2 in the z direction away from the root, and the extension direction of the transition portion 6, the elastic portion 7 and the clamping portion 8 in the z direction is opposite to the extension direction of the extension portion 5 in the z direction.

[0051] In this embodiment, the two sides of the guide surface 4 are respectively a first side plate 23 and a second side plate 24, a limiting portion 25 is extended from one side of the first side plate 23, and a fixing portion 26 is extended from one side of the second side plate 24, the limiting portion 25 and the fixing portion 26 both extend in the x direction and in opposite directions, and the first side plate 23, the second side plate 24 and the guide surface 4 form a guide groove 3 structure.

[0052] Example 2

[0053] The difference from the first embodiment is that the limiting portion 25 is located on a side close to the fixing point of the caliper, generally the jaw side.

[0054] Example 3

[0055] The difference from the first embodiment is that the fixing portion 26 is a groove body, and elastic limiting portions 25 are provided at both ends of the groove body in the z direction and on the right side, so that the return spring body is clamped on the mounting block corresponding to the bracket 31.

Claims

1. Disc brake, characterized in that: It comprises a bracket (31), a brake block (32) and a return spring (33); A bracket (31) is used for fixed installation on the vehicle body and provides space for installing a brake block (32) and a return spring (33); The brake block (32) comprises a back plate and a friction plate, and during braking, the inner friction plate and the outer friction plate are fitted with the brake disc to achieve braking of the vehicle; The return spring (33) is fixedly mounted on the bracket (31) as a connecting member and supports the brake block (32) at the same time; during the braking process, the return spring (33) will deform to accumulate elastic potential energy; when the brake is released, the deformation will be released to drive the brake block (32) to return.

2. The disc brake according to claim 1, characterized in that: Limiting ears (34) are arranged on both sides of the brake block (32); the bracket (31) includes a space for placing a disc brake, which is defined as a brake space (35); the inner side of the brake space (35) is an inner bracket (31), and the outer side is an outer bracket (31); both sides of the inner bracket (31) and the outer bracket (31) are provided with mounting grooves (36); the mounting grooves (36) are used to install a return spring (33); one side surface of the mounting groove (36) is formed by an isolated fixing block (38); the other side surface of the mounting groove (36) is formed by a limiting stopper (37).

3. The disc brake according to claim 2, characterized in that: The return spring (33) comprises a mounting seat portion (1) and a clamping portion (2); a coordinate system is defined, the axial direction is the z direction, the jaw and the back direction of the jaws are the x direction, and the direction perpendicular to the z direction and the x direction is the y direction; The mounting seat part (1) comprises a guide groove (3) arranged in the z direction, the guide groove (3) facing the y direction; wherein the guide groove (3) is installed in the mounting groove (36) and is adapted to the shape of the mounting groove (36); The clamping portion (2) is bent from the root of the guide surface (4) and enters the guide groove (3), and is bent to sequentially form an axially extending extension portion (5), a transition portion (6), an elastic portion (7) and a clamping portion (8).

4. The disc brake according to claim 3, characterized in that: The two sides of the guide groove (3) are respectively a first side plate (23) and a second side plate (24); a limiting portion (22) is extended from one side of the first side plate (23); a fixing portion (26) is extended from one side of the second side plate (24); the limiting portion (22) and the fixing portion (26) both extend in the x direction and in opposite directions; the first side plate (23), the second side plate (24) and the guide surface (4) form a guide groove (3) structure; the fixing portion (26) forms a fixing cavity, the fixing cavity cooperates with the fixing block (38), the fixing cavity is surrounded by elastic spring sheets, and the elastic spring sheets are clamped on the outer side surface of the fixing block (38); the limiting portion (22) is attached to the limiting stopper (37).

5. The disc brake according to claim 4, characterized in that: The limiting portion (22) is in an L-shape, and the limiting portion (22), the fixing portion (26), the mounting portion (1) and the clamping portion (2) are all formed by bending a spring sheet in one piece.

6. The disc brake according to claim 2, characterized in that: The platform (9) is formed at the intersection of the extension portion (5) and the transition portion (6); the transition portion (6) is an arc-shaped groove; the angle between the axis direction of the arc-shaped groove and the horizontal line is an acute angle; the horizontal line is a line intersecting the axis of the arc-shaped groove and perpendicular to the extension direction of the guide groove (3); the lateral length of the transition portion (6) is smaller than the width of the elastic portion (7); the side of the arc-shaped groove connected to the elastic portion (7) is the first connecting portion (10); the side connected to the platform (9) is the second connecting portion (11); the connecting portion between the first connecting portion (10) and the second connecting portion (11) is the arc-shaped portion (12); the tail of the first connecting portion (10), the second connecting portion (11) and the arc-shaped portion (12) forms a notch (13); the notch (13) faces the extension portion (5); and the sideline of the notch (13) is an arc-shaped line.

7. The disc brake according to claim 6, characterized in that: The elastic portion (7) comprises a first bending portion (14) and a second bending portion (15), wherein the first bending portion (14) and the second bending portion (15) are bent in the Z direction as a whole, and are bent in the Y direction at the same time as being bent in the Z direction to form a curved structure; the first bending portion (14) is a U-shaped structure, comprising a sheet 1 (16) integral with the connecting portion 1 (10), a sheet 2 (17) connected to the second bending portion (15), and a sheet 3 (18) connecting the sheet 1 (16) and the sheet 2 (17) to form an arc structure, wherein the sheet 1 (16) and the sheet 2 (17) are parallel, and the U-shaped structure is oriented toward the y direction and the z direction to form an area, and the overall direction is oriented toward the guide groove (3) and is biased downward.

8. The disc brake according to claim 7, characterized in that: The second bending portion (15) forms a C-shaped limit opening, the C-shaped limit opening is oriented toward the area formed in the y direction and the z direction, and is opposite to the direction of the guide groove (3) and is biased upward; the extension portion (5) is formed by bending a rectangular spring leaf, and comprises a leaf four (19) in the z direction and a leaf five (20) formed by bending the tail of the leaf four (19), the leaf five (20) is bent in the z direction and the y direction, the leaf four (19) and the leaf five (20) form an L-shaped structure, the width of the leaf four (19) and the leaf five (20) are the same, and are smaller than the width of the transition portion (6) and the elastic portion (7); the projection of the extension portion (5) in the y direction does not overlap with the projection of the transition portion (6) and the elastic portion (7) in the y direction, and the width of the projection area formed by the two in the y direction is less than or equal to the width of the guide groove (3).

9. The disc brake according to claim 1, characterized in that: The clamping portion (8) comprises a clamping arm (21), a limiting claw (22) extending from the end of the clamping arm (21), and an interval formed by the limiting portion (22) and the elastic portion (7) is used to limit and restrict the brake block (32), wherein the extension direction of the limiting claw (22) is the y direction away from the guide groove (3); wherein the extension direction of the extension portion (5) in the z direction is the direction away from the root of the guide surface (4) and forms the farthest point of the clamping portion (2) away from the root in the z direction, and the extension direction of the transition portion (6), the elastic portion (7) and the clamping portion (8) in the z direction is opposite to the extension direction of the extension portion (5) in the z direction.

10. The disc brake according to claim 1, characterized in that: The invention also comprises a caliper body (39), wherein the caliper body (39) is fixedly mounted on the bracket (31), and the brake formed by the caliper body (39) and the bracket (31) is a floating caliper.

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