Double-return low-dragging dry type parking brake

Abstract

The invention relates to the field of brakes, and discloses a double-return low-dragging dry type parking brake which comprises a caliper body, an executing mechanism, a return mechanism and a brake block assembly. The pincer body comprises an upper pincer body and a lower pincer body, a pincer cavity is formed on one side, a pincer back opening is formed on the other side, and the pincer cavity and the pincer back opening are communicated with each other; the upper clamp body is provided with a pin hole, a first pin assembly is installed in the pin hole and provided with a sliding pin, the lower end of the sliding pin is provided with a first limit used for limiting the lower end face of the pin hole, the upper end of the sliding pin is provided with a second limit, the sliding pin is further sleeved with a first return spring, and the upper end of the first return spring is supported on the second limit. The lower end of the first return spring is supported on the upper end face of the pin hole. The brake adopts a double-return buffering structure, is actually convenient to mount and is stable in movement.

Description

Technical Field

[0001] This invention relates to the field of braking, and more particularly to a dual-return low-drag dry parking brake. Background Technology

[0002] Chinese patent CN223648390U discloses a dual-cylinder EPB electronic parking brake, which uses a dual-cylinder setup to meet the demand for high braking force. However, it does not improve noise reduction or low drag. Furthermore, existing electronic parking brakes all require separate brackets for installation, resulting in a larger overall size. Moreover, the larger brake relies solely on a traditional return spring structure for return, which can lead to slow return, fatigue of the return mechanism, and other problems. Additionally, the traditional pin structure is susceptible to external forces affecting its circumferential direction and position. Summary of the Invention

[0003] This invention addresses the problems in existing technologies, such as insufficient return speed of large-volume and heavy parking brakes, easy dragging, and easy damage to the sliding surface of the pin, by providing a dual-return low-drag dry parking brake.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A dual-return low-drag dry parking brake includes a caliper body, an actuator, a return mechanism, and a brake block assembly. The clamp body includes an upper clamp body and a lower clamp body, which forms a clamp mouth on one side and a clamp back mouth on the other side, and the clamp mouth and clamp back mouth are connected to each other; The upper clamp body has a pin hole, in which a first pin assembly is installed. The first pin assembly has a sliding pin. The lower end of the sliding pin has a first limit for limiting the lower end face of the pin hole, and the upper end of the sliding pin has a second limit. A first return spring is also sleeved on the sliding pin. The upper end of the first return spring is supported by the second limit, and the lower end of the first return spring is supported by the upper end face of the pin hole.

[0005] Preferably, the sliding pin includes an upper pin and a lower pin. The upper pin has a connecting hole at its upper end, and the lower pin has a connecting post at its lower end. The connecting post is inserted into the connecting hole and fixed so that the upper pin and the lower pin are an integral structure. The first limit is located at the lower end of the lower pin, and the second limit is located at the upper end of the upper pin.

[0006] Preferably, the sliding pin includes a first pin body and a limiting cover. The upper end face of the first pin body has a limiting claw, and the middle part of the limiting cover is provided with a first mounting hole that matches the limiting claw. The first mounting hole and the limiting claw are fixedly connected after assembly, and the first return spring abuts against the lower end face of the limiting cover.

[0007] Preferably, the sliding pin has a second pin body and an upper cover, with the upper cover being spun and fixed to the upper end of the second pin body.

[0008] Preferably, a first positioning groove is provided around the opening at the upper end of the pin hole, the lower end of the first return spring is positioned in the first positioning groove, the second limit has a second positioning groove, and the upper end of the first return spring is positioned in the second positioning groove.

[0009] Preferably, it also includes a buffer sleeve, which is made of rubber or deformable plastic. The buffer sleeve is a tubular part with a lower limit stop at its lower end and an upper limit stop at its upper end. The buffer sleeve is press-fitted into the pin hole, with the upper limit stop abutting against the upper end face of the pin hole and the lower limit stop abutting against the lower end face of the pin hole.

[0010] Preferably, it also includes a sliding sleeve, which is fixedly installed inside the buffer sleeve. A sliding pin passes through the sliding sleeve and slides along the axial direction of the sliding sleeve. The sliding sleeve has a through-hole in the axial direction and is a metal tube with elastic deformation capability.

[0011] Preferably, the actuator is mounted on the upper clamp body for outputting braking power; the return mechanism has an upper end support wing, a lower end support wing, and a side support part, and the return mechanism also has a limiting port; The brake block assembly includes an upper brake block and a lower brake block. The upper brake block is connected to the output end of the actuator, and the lower brake block is mounted on the lower caliper. The upper end support wing supports the lower end face of the upper brake block, the lower end support wing supports the upper end face of the lower brake block, and the side support wing supports the caliper back sides of the upper brake block and the lower brake block.

[0012] Preferably, the side support wing includes an upper side support wing and a lower side support wing, and the return mechanism includes a main spring frame, an upper support spring frame, a lower support spring frame, and a guide spring frame, and all of the above components have elastic deformation capability. The main spring frame is set vertically, with an upper side support wing at the top and a lower side support wing at the bottom. Both the upper and lower side support wings are U-shaped structures formed by bending. The main spring frame has extension plates extending in the left and right directions in the middle, and the extension plates are bent forward to form a U-shaped fixing part; The upper support spring frame has an upper connecting part in the middle and upper end support wings on the left and right sides. The upper end support wings are connected through the upper connecting part. The lower support spring frame has a lower connecting part in the middle and lower end support wings on the left and right sides. The lower end support wings are connected through the lower connecting part.

[0013] Preferably, the device also includes a pin, a lower clamp body with a first insertion hole, an upper clamp body with a second insertion hole, and a support groove on the back side of both the upper and lower brake blocks that matches the side support wings. The pin has a first limiting ring groove and also includes a drum-shaped locking spring. The locking spring is installed in the first limiting groove and has a first opening. When deformed, the locking spring is fixedly engaged with the first insertion hole. The pin sequentially engages with the first insertion hole, the lower brake block, the limiting opening, the upper limiting opening, and the second insertion hole.

[0014] Because the present invention adopts the above technical solution, it has the following significant technical effects: This solution eliminates the need for a bracket in traditional electronic parking brakes, and the caliper body slides more smoothly without unnecessary shaking or wobbling. A return spring assists in the caliper body's return to its original position, and the pin structure facilitates assembly and accommodates springs of different sizes. Combined with the brake pad return, the overall return is smoother and faster. Both the braking and return processes exhibit linear motion, ensuring reliable braking without drag or abnormal noise. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the brake in one embodiment.

[0016] Figure 2 yes Figure 1 A diagram showing the rear-view perspective.

[0017] Figure 3 This is a schematic diagram of the sliding pin assembly.

[0018] Figure 4 yes Figure 3 Enlarged image.

[0019] Figure 5 This is a schematic diagram showing the fit of structures such as sliding pins and buffer sleeves.

[0020] Figure 6 This is a schematic diagram showing the fit between the return spring frame and the brake block.

[0021] Figure 7 This is a schematic diagram showing the fit between the return spring frame and the brake block.

[0022] Figure 8 This is a structural schematic diagram of the pin assembly.

[0023] Figure 9 This is a schematic diagram of the fit between the sliding sleeve and the sliding pin.

[0024] Figure 10 Another embodiment of the sliding pin schematic diagram.

[0025] Figure 11 yes Figure 10 A magnified view of a portion of the image.

[0026] Figure 12 This is a schematic diagram of another embodiment of sliding.

[0027] The technical names of the reference numerals in the figure are as follows: 1—clamp body, 2—actuator, 3—return mechanism, 4—brake block assembly, 5—upper clamp body, 6—lower clamp body, 7—clamp mouth, 8—clamp back jaw, 9—pin hole, 10—sliding pin, 11—first limit, 12—second limit, 13—first return spring, 14—upper pin, 15—lower pin, 16—connecting hole, 17—connecting post, 18—first pin, 19—limit cover, 20—limiting claw, 21—first mounting hole, 22—second pin, 23— Top cover, 24—first positioning groove, 25—second positioning groove, 26—buffer sleeve, 27—lower limit stop edge, 28—upper limit stop edge, 29—sliding sleeve, 30—seam, 32—upper end face support wing, 33—lower end face support wing, 34—upper side support part, 35—lower side support part, 36—main spring frame, 37—upper support spring frame, 38—lower support spring frame, 39—fixed part, 40—upper connecting part, 42—lower connecting part, 43—pin, 44—first insertion hole, 45—second insertion hole, 46—locking spring. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0029] Example 1 A dual-return low-drag dry parking brake includes a caliper body 1, an actuator 2, a return mechanism 3, and a brake block assembly 4. The clamp body 1 includes an upper clamp body 5 and a lower clamp body 6, which are connected and fixed by long bolts. It forms a clamp mouth 7 on one side and a clamp back mouth 8 on the other side. The clamp mouth 7 and the clamp back mouth 8 are interconnected. The clamp mouth 7 is used to place the brake block assembly 4 and the brake disc. The design of the clamp back mouth 8 is for the cooperation between the brake block and the pin 43 and to facilitate the assembly of the return mechanism 3 and the brake block assembly 4.

[0030] In one embodiment, the brake eliminates the bracket structure required for traditional brake installation. The caliper body 5 has a pin hole 9, which is a through hole. A first pin assembly is installed within the pin hole 9. The first pin assembly has a sliding pin 10, with a fixing hole in its middle. The sliding pin 10 is fixed to the vehicle body through the fixing hole. The sliding pin 10 is fixedly connected to the vehicle body, and during braking, the caliper body 1 slides along the axis of the sliding pin 10. The lower end of the sliding pin 10 has a first limit 11 for limiting its position against the lower end face of the pin hole 9, and the upper end of the sliding pin 10 has a second limit 12. The purpose of the first limit 11 and the second limit 12 is to ensure the position of the caliper body 1 and the sliding pin 10. A first return spring 13 is also fitted onto the sliding pin 10. The upper end of the first return spring 13 is supported by the second limit 12, and the lower end of the first return spring 13 is supported by the upper end face of the pin hole 9. In the initial state, the first return spring 13 is subjected to compression force. Therefore, under the action of the first return spring 13, the first limit 11 is firmly pressed against the lower end face, ensuring that its initial position does not wobble and avoiding damage.

[0031] In one embodiment, the sliding pin 10 includes an upper pin 14 and a lower pin 15. The upper pin 14 has a connecting hole 16 at its upper end, and the lower pin 15 has a connecting post 17 at its lower end. The connecting post 17 is inserted into the connecting hole 16 and fixed, making the upper pin 14 and lower pin 15 an integral structure. The advantage of this design is that it facilitates the installation of the pin. The connecting post 17 and the connecting hole 16 are threaded together, allowing adjustment of the length of the entire sliding pin 10 to adapt to different environments. Specifically, a first limit 11 is located at the lower end of the lower pin 15, and a second limit 12 is located at the upper end of the upper pin 14. Both the upper pin 14 and the lower pin 15 are cylindrical structures with the same outer diameter.

[0032] In one embodiment, a first positioning groove 24 is provided around the opening at the upper end of the pin hole 9. The lower end of the first return spring 13 is positioned within the first positioning groove 24. The second limiter 12 has a second positioning groove 25, and the upper end of the first return spring 13 is positioned within the second positioning groove 25. This structural design facilitates the assembly of the spring, prevents radial movement, and ensures that the sliding pin 10 is subjected to uniform force at all points, while the clamp body 1 always maintains axial movement.

[0033] The upper circumferential side of the sliding pin 10 is provided with a first limiting annular groove 11, and also includes a dust cover. The upper end of the dust cover is engaged with the first limiting annular groove 11, and the other end has a retaining ring that abuts against the upper edge of the pin hole 9.

[0034] Preferably, it also includes a buffer sleeve 26, which is made of rubber or a deformable plastic material. The buffer sleeve 26 is a tubular part with a lower limit stop 27 at its lower end and an upper limit stop 28 at its upper end. The buffer sleeve 26 is pressed into the pin hole 9, with the upper limit stop 28 abutting against the upper end face of the pin hole 9 and the lower limit stop 27 abutting against the lower end face of the pin hole 9.

[0035] Preferably, it also includes a sliding sleeve 29, which is fixedly installed inside the buffer sleeve 26. The sliding pin 10 passes through the sliding sleeve 29 and slides along the axial direction of the sliding sleeve 29. The sliding sleeve 29 has a through-hole 30 in the axial direction. The sliding sleeve 29 is a metal tube with elastic deformation capability.

[0036] Preferably, the actuator 2 is mounted on the upper clamp body 5 and is used to output braking power; the return mechanism 3 has an upper end support wing 32, a lower end support wing 33 and a side support part, and the return mechanism 3 also has a limiting port; The brake block assembly 4 includes an upper brake block and a lower brake block. The upper brake block is connected to the output end of the actuator 2, and the lower brake block is mounted on the lower caliper 6. The upper end support wing 32 is supported on the lower end face of the upper brake block, the lower end support wing 33 is supported on the upper end face of the lower brake block, and the side support wing is supported on the caliper back side of the upper brake block and the lower support block.

[0037] Preferably, the side support wing includes an upper side support wing and a lower side support wing, and the return mechanism 3 includes a main spring frame 36, an upper support spring frame 37, a lower support spring frame 38 and a guide spring frame, and all of the above components have elastic deformation capability. The main spring frame 36 is set vertically, with an upper side support wing at the top and a lower side support wing at the bottom. Both the upper and lower side support wings are U-shaped structures formed by bending. The main spring frame 36 has extension plates extending in the left and right directions in the middle left and right sides, and the extension plates are bent forward to form a U-shaped fixing part 39. The upper support spring frame 37 has an upper connecting part 40 in the middle and upper end support wings 32 on the left and right sides. The upper end support wings 32 are connected through the upper connecting part 40. The lower support spring frame 38 has a lower connecting part 42 in the middle and lower end support wings 33 on the left and right sides. The lower end support wings 33 are connected through the lower connecting part 42.

[0038] Preferably, the device also includes a pin 43, a lower clamp body 6 with a first insertion hole 44, an upper clamp body 5 with a second insertion hole 45, and a support groove for the side support wings of both the upper brake block and the lower brake block. The pin 43 has a first limiting annular groove 11 and also includes a drum-shaped locking spring 46. The locking spring 46 is installed in the first limiting groove 11 and has a first opening. When deformed, the locking spring 46 is fixedly engaged with the first insertion hole 44. The pin 43 is engaged with the first insertion hole 44, the lower brake block, the limiting opening, the upper limiting opening, and the second insertion hole 45 in sequence.

[0039] Because the present invention adopts the above technical solution, it has the following significant technical effects: This solution eliminates the need for a bracket in traditional electronic parking brakes, and the caliper body 1 slides more smoothly without excessive shaking or wobbling. The return spring assists the caliper body 1 in returning to its original position, and the pin structure of this design facilitates assembly and can accommodate springs of different sizes. Combined with the return of the brake pads, the overall return is smoother and faster. Both the braking and return processes exhibit linear motion, ensuring reliable braking without drag or abnormal noise.

[0040] Example 2 The difference from Embodiment 1 lies in the structural design of the sliding pin 10. In this embodiment, the sliding pin 10 includes a first pin body 18 and a limiting cover 19. The upper end of the first pin body 18 has a limiting claw 20, and the middle of the limiting cover 19 is provided with a first mounting hole 21 that matches the limiting claw 20. After the first mounting hole 21 and the limiting claw 20 are assembled, they are fixedly connected. The first return spring 13 abuts against the lower end face of the limiting cover 19. The advantage of this design is that it is low in cost and easy to install. The first pin body 18 is directly inserted into the pin hole 9, and then a spring is fitted on its upper end. Finally, the limiting cover 19 and the limiting claw 20 are assembled. Under the action of the spring, the claw secures the limiting cover 19 and the limiting claw 20 together.

[0041] This design simplifies manufacturing and assembly, saving costs.

[0042] Example 3 The difference from Embodiment 1 lies in the structural design of the sliding pin 10. In this embodiment, the sliding pin 10 has a second pin body 22 and an upper cover 23. The upper cover 23 is assembled and fixed to the upper end of the second pin body 22 by press riveting or ring riveting. Alternatively, other fixing methods can be used to fix the two together.

Claims

1. A dual-return low-drag dry parking brake is characterized by: It includes a clamp body (1), an actuator (2), a return mechanism (3), and a brake block assembly (4); The clamp body (1) includes an upper clamp body (5) and a lower clamp body (6), which forms a clamp mouth (7) on one side and a clamp back mouth (8) on the other side, and the clamp mouth (7) and the clamp back mouth (8) are connected to each other; The upper clamp body (5) has a pin hole (9), and a first pin assembly is installed in the pin hole (9). The first pin assembly has a sliding pin (10). The lower end of the sliding pin (10) has a first limit (11) for limiting the lower end face of the pin hole (9). The upper end of the sliding pin (10) has a second limit (12). A first return spring (13) is also sleeved on the sliding pin (10). The upper end of the first return spring (13) is supported by the second limit (12), and the lower end of the first return spring (13) is supported by the upper end face of the pin hole (9).

2. The dual-return low-drag dry parking brake according to claim 1 is characterized in that: The sliding pin (10) includes an upper pin (14) and a lower pin (15). The upper end of the upper pin (14) is provided with a connecting hole (16), and the lower end of the lower pin (15) has a connecting post (17). The connecting post (17) is inserted into the connecting hole (16) and fixed so that the upper pin (14) and the lower pin (15) are an integral structure. The first limit (11) is located at the lower end of the lower pin (15), and the second limit (12) is located at the upper end of the upper pin (14).

3. The dual-return low-drag dry parking brake according to claim 1 is characterized in that: The sliding pin (10) includes a first pin body (18) and a limiting cover (19). The upper end face of the first pin body (18) has a limiting claw (20). The middle part of the limiting cover (19) is provided with a first mounting hole (21) that is adapted to the limiting claw (20). The first mounting hole (21) and the limiting claw (20) are fixedly connected after assembly. The first return spring (13) abuts against the lower end face of the limiting cover (19).

4. The dual-return low-drag dry parking brake according to claim 1 is characterized in that: The sliding pin (10) has a second pin body (22) and an upper cover (23), the upper cover (23) being spun and fixed to the upper end of the second pin body (22).

5. The dual-return low-drag dry parking brake according to claim 1 is characterized in that: A first positioning groove (24) is provided around the opening of the upper end of the pin hole (9). The lower end of the first return spring (13) is positioned in the first positioning groove (24). The second limit (12) has a second positioning groove (25). The upper end of the first return spring (13) is positioned in the second positioning groove (25).

6. The dual-return low-drag dry parking brake according to claim 1 is characterized in that: It also includes a buffer sleeve (26), which is made of rubber or plastic with deformability. The buffer sleeve (26) is a tubular part with a lower limit stop (27) at its lower end and an upper limit stop (28) at its upper end. The buffer sleeve (26) is pressed into the pin hole (9). The upper limit stop (28) abuts against the upper end face of the pin hole (9), and the lower limit stop (27) abuts against the lower end face of the pin hole (9).

7. The dual-return low-drag dry parking brake according to claim 6 is characterized in that: It also includes a sliding sleeve (29), which is fixedly installed inside the buffer sleeve (26). A sliding pin (10) passes through the sliding sleeve (29) and slides along the axis of the sliding sleeve (29). The sliding sleeve (29) has a through slot (30) in the axial direction. The sliding sleeve (29) is a metal tube with elastic deformation capability.

8. The dual-return low-drag dry parking brake according to claim 1 is characterized in that: The actuator (2) is mounted on the upper clamp body (5) and is used to output braking power; the return mechanism (3) has an upper end face support wing (32) and a lower end face support wing (33) and a side support part, and the return mechanism (3) also has a limit port; The brake block assembly (4) includes an upper brake block and a lower brake block. The upper brake block is connected to the output end of the actuator (2). The lower brake block is mounted on the lower caliper (6). The upper end support wing (32) is supported on the lower end face of the upper brake block, and the lower end support wing (33) is supported on the upper end face of the lower brake block. The side support wing is supported on the caliper back side of the upper brake block and the lower support block.

9. The dual-return low-drag dry parking brake according to claim 8 is characterized in that: The side support wing includes an upper side support wing and a lower side support wing. The return mechanism (3) includes a main spring frame (36), an upper support spring frame (37), a lower support spring frame (38), and a guide spring frame, and all of the above components have elastic deformation capabilities. The main spring frame (36) is set vertically, with an upper side support wing at the top and a lower side support wing at the bottom. Both the upper and lower side support wings are U-shaped structures formed by bending. The main spring frame (36) has extension plates extending in the left and right directions in the middle left and right sides, and the extension plates are bent forward to form a U-shaped fixing part (39). The upper support spring frame (37) has an upper connecting part (40) in the middle and upper end support wings (32) on the left and right sides. The upper end support wings (32) are connected through the upper connecting part (40). The lower support spring frame (38) has a lower connecting part (42) in the middle and lower end support wings (33) on the left and right sides. The lower end support wings (33) are connected through the lower connecting part (42). The upper connecting part (40) and the lower connecting part (42) are both adapted to the corresponding fixing part (39) and are locked on the outside of the corresponding fixing part (39). The upper connecting part (40) and the lower connecting part (42) are riveted and fixed to the main spring frame (36).

10. The dual-return low-drag dry parking brake according to claim 8 is characterized in that: It also includes a pin (43), the lower clamp body (6) has a first insertion hole (44), the upper clamp body (5) has a second insertion hole (45), the upper brake block and the lower brake block clamp back side have support slots that cooperate with the side support wings; the pin (43) has a first limiting (11) ring groove, and also includes a drum-shaped locking spring (46), the locking spring (46) is installed in the first limiting (11) groove, the locking spring (46) has a first opening, the locking spring (46) is fixedly engaged with the first insertion hole (44) when deformed, and the pin (43) is engaged with the first insertion hole (44), the lower brake block, the limiting port, the upper limiting port and the second insertion hole (45) in sequence.

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