Return reed

Abstract

The utility model relates to the field of brake block return parts, and discloses a return reed which comprises a mounting seat part (1) and a clamping part (2), a coordinate system is defined, the axial direction is the z direction, the jaw direction and the plier back direction 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, and the guide groove (3) faces the y direction; and the clamping part (2) is bent from the root of the guide surface (4) and then enters the guide groove (3), and an extension part (5), a transition part (6), an elastic part (7) and a clamping part (8) which extend axially are sequentially formed by bending. The return spring has the advantages of reliable structure and long service life.

Description

Technical Field

[0001] The utility model relates to the field of return components of brake blocks, in particular to a return spring leaf. Background Art

[0002] Chinese patent application document CN219623115U - Low-drag electronic brake caliper and electronic parking brake, which is applied in the electronic parking brake. A return spring is configured for the friction plate, which can promote the return of the friction plate through the return spring after braking, and can correspondingly improve driving comfort and extend the service life of the friction plate and the brake disc.

[0003] However, for this type of brake block return structure, it only has a single C-ring structure to absorb deformation energy. Due to its relatively long overall length, the C-ring absorbs a large amount of energy and deforms greatly. It is prone to decline after long-term use. Moreover, it is directly bent from the root to form the above structure, and then bent back and forth under stress, resulting in the bending root being subjected to the force of bending back and forth for a long time, greatly shortening its service life. And this structure provides limited clamping force and supporting force, and the stability of the friction block is average. Summary of the Utility Model

[0004] The utility model provides a return spring leaf aiming at the deficiencies in the prior art.

[0005] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0006] The return spring leaf includes a mounting seat part and a clamping part; a coordinate system is defined, the axial direction is the z direction, the jaw and the back of the jaw directions are the x direction, and the direction perpendicular to the z direction and the x direction is the y direction;

[0007] The mounting seat part includes a guide groove arranged in the z direction, and the guide groove faces the y direction;

[0008] The clamping part bends from the root of the guide surface and then enters the guide groove, and the bending successively forms an axially extending extension part, a transition part, an elastic part and a clamping part.

[0009] Preferably, a platform is formed at the intersection position of the extension part and the transition part, the transition part is an arc groove, the axial direction of the arc groove forms an acute angle with the horizontal line, and 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; the transverse length of the transition part is less than the width of the elastic part.

[0010] Preferably, one side of the arc groove connected to the elastic part is the first connecting part, the side connected to the platform is the second connecting part, the connecting part between the first connecting part and the second connecting part is an arc part, the tails of the first connecting part, the second connecting part and the arc part form a notch, the notch faces the extension part, and the side line of the notch is an arc line.

[0011] Preferably, the elastic part includes a first bending part and a second bending part. The first bending part and the second bending part are bent as a whole in the Z direction, and while being bent in the z direction, they are bent in the y direction to form a bending structure; the first bending part is a U-shaped structure, which includes a first sheet integrated with the connecting part, a second sheet connected to the second bending part, and a third sheet connecting the first sheet and the second sheet to form an arc structure. The first sheet and the second sheet are parallel, and the U-shaped structure faces the region formed by the y direction and the z direction, and the overall direction faces the direction of the guiding groove and is inclined downward.

[0012] Preferably, the second bending part forms a C-shaped limiting opening, which faces the region formed by the y direction and the z direction, and is inclined upward and away from the direction of the guiding groove.

[0013] Preferably, the extending part is formed by bending a rectangular spring piece, which includes a fourth sheet in the z direction and a fifth sheet formed by bending the tail of the fourth sheet. The fifth sheet is bent in the z direction and the y direction. The fourth sheet and the fifth sheet form an L-shaped structure. The fourth sheet and the fifth sheet have the same width, and are smaller than the widths of the transition part and the elastic part.

[0014] Preferably, the projection of the extending part in the y direction does not coincide with the projections of the transition part and the elastic part in the y direction, and the width of the projection region formed by the two in the y direction is less than or equal to the width of the guiding groove.

[0015] Preferably, the clamping part includes a clamping arm, and a limiting part extends from the end of the clamping arm. The interval formed by the support of the limiting part and the elastic part is used to limit and restrict the brake block. The extending direction of the limiting part is the y direction away from the guiding groove.

[0016] Preferably, the extending direction of the extending part in the z direction is the direction away from the root of the guiding surface, and forms the farthest point in the z direction away from the root of the clamping part, and the extending directions of the transition part, the elastic part, and the clamping part in the z direction are opposite to the extending direction of the extending part in the z direction.

[0017] Preferably, the two sides of the guiding surface are a first side plate and a second side plate respectively. A limiting part extends from one side of the first side plate, and a fixing part extends from one side of the second side plate. The limiting part and the fixing part both extend in the x direction and the extending directions are opposite. The first side plate, the second side plate, and the guiding surface enclose a guiding groove structure.

[0018] This solution has the following advantages compared with the prior art. This solution designs the overall solution. 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 at multiple fulcrums. Secondly, through the design of the U-shaped structure and the C-shaped structure in the S-shaped structure, the force received is downward in one direction, and on the other hand, it is transmitted to the tail end of the U-shaped structure. Since the tail end of the U-shaped structure is upturned, it can not only absorb elastic force by deforming in the z direction, but also absorb elastic force in the y direction, and at the same time, the acting force on the transition part is small, thereby extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the device.

[0020] Figure 2 It is a schematic diagram of the overall structure of the device.

[0021] Figure 3 It is a schematic diagram of the overall structure of the device.

[0022] Figure 4 It is a schematic diagram of the overall structure of the device.

[0023] The technical names of the reference numerals in the figure 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 part, 13 - notch, 14 - first bending part, 15 - second bending part, 16 - sheet one, 17 - sheet two, 18 - sheet three, 19 - sheet four, 20 - sheet five, 21 - clamping arm, 22 - limiting part, 23 - first side plate, 24 - second side plate, 25 - limiting part, 26 - fixing part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present utility model will be further described in detail below with reference to the drawings and embodiments.

[0025] Embodiment 1

[0026] The return spring piece includes a mounting seat part 1 and a clamping part 2; a coordinate system is defined, the axial direction is the z-direction, the jaw and the back of the jaw directions are the x-direction, and the direction perpendicular to the z-direction and the x-direction is the y-direction; where the up, down, left, right, front, and back in this article are Figure 1 used as the reference benchmark, specifically, up and down are in the z-axis direction, front and back are in the y-direction, and left and right are in the x-direction.

[0027] The mounting seat part 1 includes a guide groove 3 arranged in the z-direction, and the guide groove 3 faces the y-direction;

[0028] The clamping part 2 starts from the root of the guide surface 4, bends and then enters the guide groove 3, and the bends sequentially form an axially extending extension part 5, a transition part 6, an elastic part 7, and a clamping part 8. Specifically, the mounting seat part 1 and the clamping part 2 are formed by bending an integral spring piece, 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 part 2 extends from the lower end of the guide surface 4 and then bends to form the above structure.

[0029] Due to the limitations of the bending direction and structural configuration of the clamping part 2 in this solution, it is necessary to first design the shape of the clamping part 2 before bending, and what determines its shape is the problems to be faced when bending into the above clamping part 2.

[0030] Firstly, there is the issue of space, followed by the issues of bending force, stress concentration, and operation convenience, etc.

[0031] Therefore, the shape of the following clamping part 2 is designed. A platform 9 is formed at the intersection position of the extension part 5 and the transition part 6. Specifically, in this embodiment, the platform 9 is a plate structure, and the plate structure is horizontal or slightly lifted. The transverse and longitudinal dimensions of the plate are larger than the widths of the extension part 5 and the transition part 6. The larger platform 9 can withstand a larger deformation amount and can meet different bending requirements, leaving a sufficient deformation area. Secondly, the transition part 6 is an arc-shaped groove, and the included angle between the axis direction of the arc-shaped groove and the horizontal line is an acute angle. The horizontal line is a line that intersects the axis of the arc-shaped groove and is perpendicular to the extending direction of the guiding groove 3. Since the transition part 6 is obliquely arranged as a whole, the transverse length of the transition part 6 is smaller than the width of the elastic part 7.

[0032] In this embodiment, one side of the arc-shaped groove connected to the elastic part 7 is the first connecting part 10, and the side connected to the platform 9 is the second connecting part 11. The connecting part between the first connecting part 10 and the second connecting part 11 is the arc-shaped part 12. The tails of the first connecting part 10, the second connecting part 11, and the arc-shaped part 12 form a notch 13. The notch 13 faces the extension part 5, and the side line of the notch 13 is an arc line.

[0033] 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 while being bent in the z direction, they are bent in the y direction to form a bending structure. The first bending part 14 is a U-shaped structure, which includes a first piece 16 integrated with the first connecting part 10, a second piece 17 connected to the second bending part 15, and a third piece 18 connecting the first piece 16 and the second piece 17 to form an arc-shaped structure. The first piece 16 and the second piece 17 are parallel. The U-shaped structure faces the area formed by the y direction and the z direction, and the overall direction faces the guiding groove 3 and is inclined downward. The first bending part 14 plays a major role in deformation. Its dimension is longer and it has a certain inclination angle, so that the first piece 16 not only applies a deformation force in the z direction but also transmits the deformation force to the tail, enabling the entire first bending part 14 to receive and withstand the deformation force, avoiding the problem of stress concentration caused by single-position stress.

[0034] In this embodiment, the second bending part 15 forms a C-shaped limiting opening. The C-shaped limiting opening faces the area formed by the y direction and the z direction, and is directed away from the guiding groove 3 and is inclined upward. The tangents at both ends of the C direction are approximately in a right-angle structure.

[0035] The extension part 5 is formed by bending a rectangular reed, and includes a fourth piece 19 in the z direction and a fifth piece 20 formed by bending the tail of the fourth piece 19. The fifth piece 20 is bent in the z direction and the y direction. The fourth piece 19 and the fifth piece 20 form an L-shaped structure. The fourth piece 19 and the fifth piece 20 have the same width, and the width is smaller than that of the transition part 6 and the elastic part 7. The fourth piece 19 of this extension part 5 structure provides a deformation space for the subsequent transition part 6 and elastic part 7, and can confirm the final clamping position according to needs, meeting the requirements of various products.

[0036] In this embodiment, in order to avoid stress concentration problems during the bending process and ensure that the force received by the clamping part 2 deforms in the z direction and the y direction during the entire force application process, mainly deforming in the z direction. The projection of the extension part 5 in the y direction does not coincide with the projections of the transition part 6 and the elastic part 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.

[0037] The clamping part 8 includes a clamping arm 21, and a limiting part 22 extends from the end of the clamping arm 21. The interval formed by the support of the limiting part 25 and the elastic part 7 is used to limit and restrict the brake block. The extending direction of the limiting part 22 is the y direction away from the guide groove 3. The included angle between the limiting part 22 and the main body of the clamping arm 21 is an acute angle, so that it can be conveniently buckled on the brake block. The inclined sheet 5 can also perform the compensation function of the brake.

[0038] In this embodiment, the extending direction of the extension part 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 part 2 away from the root in the z direction. The extending directions of the transition part 6, the elastic part 7, and the clamping part 8 in the z direction are opposite to the extending direction of the extension part 5 in the z direction.

[0039] In this embodiment, on both sides of the guide surface 4 are a first side plate 23 and a second side plate 24 respectively. A limiting part 25 extends from one side of the first side plate 23, and a fixing part 26 extends from one side of the second side plate 24. The limiting part 25 and the fixing part 26 both extend in the x direction and the extending directions are opposite. The first side plate 23, the second side plate 24, and the guide surface 4 enclose a guide groove 3 structure.

[0040] Embodiment 2

[0041] The difference from Embodiment 1 is that: the limiting part 25 is located on the side close to the caliper fixing point, generally the jaw side.

[0042] Embodiment 3

[0043] The difference from Embodiment 1 is that: the fixing part 26 is a groove body, and elastic limiting parts 25 are provided at both ends and the right side in the z direction of the groove body, so as to clamp the return spring body on the corresponding mounting block of the caliper body.

Claims

1. Return spring piece, characterized in that: It includes a mounting base part (1) and a clamping part (2); a coordinate system is defined, the axial direction is the z-direction, the jaw and the back of the jaw direction are the x-direction, and the direction perpendicular to the z-direction and the x-direction is the y-direction; The mounting base part (1) includes a guiding groove (3) arranged in the z-direction, and the guiding groove (3) faces the y-direction; The clamping part (2) bends from the root of the guiding surface (4) and then enters the guiding groove (3), and the bending successively forms an axially extending extension part (5), a transition part (6), an elastic part (7) and a clamping part (8).

2. The return spring piece according to claim 1, wherein: A platform (9) is formed at the intersection position of the extension part (5) and the transition part (6). The transition part (6) is an arc-shaped groove, and the axial direction of the arc-shaped groove forms an acute angle with the horizontal line. The horizontal line is a line that intersects the axis of the arc-shaped groove and is perpendicular to the extending direction of the guiding groove (3); the transverse length of the transition part (6) is smaller than the width of the elastic part (7).

3. The return spring piece according to claim 2, characterized in that: One side of the arc-shaped groove connected to the elastic part (7) is the first connecting part (10), and the side connected to the platform (9) is the second connecting part (11). The connecting part between the first connecting part (10) and the second connecting part (11) is the arc-shaped part (12). The tails of the first connecting part (10), the second connecting part (11) and the arc-shaped part (12) form a notch (13). The notch (13) faces the extension part (5), and the side line of the notch (13) is an arc-shaped line.

4. The return spring piece according to claim 3, characterized in that: 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 integrally in the Z-direction, and are bent in the y-direction while being bent in the z-direction to form a bending structure; the first bending part (14) is a U-shaped structure, which includes a first piece (16) integrated with the first connecting part (10), a second piece (17) connected to the second bending part (15), and a third piece (18) connecting the first piece (16) and the second piece (17) to form an arc-shaped structure. The first piece (16) and the second piece (17) are parallel. The U-shaped structure faces the region formed by the y-direction and the z-direction, and the overall direction faces the direction of the guiding groove (3) and is inclined downward.

5. The return spring piece according to claim 4, wherein: The second bending part (15) forms a C-shaped limiting opening. The C-shaped limiting opening faces the region formed by the y-direction and the z-direction, and is inclined upward and away from the direction of the guiding groove (3).

6. The return spring piece according to claim 1, characterized in that: The extension part (5) is formed by bending a rectangular spring piece, which includes a fourth piece (19) in the z-direction and a fifth piece (20) formed by bending the tail of the fourth piece (19). The fifth piece (20) is bent in the z-direction and the y-direction. The fourth piece (19) and the fifth piece (20) form an L-shaped structure. The fourth piece (19) and the fifth piece (20) have the same width, and are smaller than the widths of the transition part (6) and the elastic part (7).

7. The return spring leaf according to claim 1, wherein: The projection of the extension part (5) in the y-direction does not coincide with the projections of the transition part (6) and the elastic part (7) in the y-direction, and the width of the projection region formed by the two in the y-direction is less than or equal to the width of the guiding groove (3).

8. The return spring piece according to claim 1, characterized in that: The clamping part (8) includes a clamping arm (21). A limiting part (22) is extended from the end of the clamping arm (21). The interval formed by the support of the limiting part (22) and the elastic part (7) is used to limit and restrict the brake block. The extending direction of the limiting part (22) is the y-direction away from the guiding groove (3).

9. The return spring leaf according to claim 1, characterized in that: Among them, the extending direction of the extension part (5) in the z direction is away from the root of the guiding surface (4), and it forms the farthest point of the clamping part (2) away from the root in the z direction. The extending directions of the transition part (6), the elastic part (7), and the clamping part (8) in the z direction are opposite to the extending direction of the extension part (5) in the z direction.

10. The return spring piece according to claim 1, wherein: On both sides of the guiding surface (4) are the first side plate (23) and the second side plate (24) respectively. A limiting part (22) extends from one side of the first side plate (23), and a fixing part (26) extends from one side of the second side plate (24). Both the limiting part (22) and the fixing part (26) extend in the x direction and have opposite extending directions. The first side plate (23), the second side plate (24), and the guiding surface (4) enclose a guiding groove (3) structure.

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