Brakes, Brake Systems, and Vehicles

Abstract

A brake (100), a brake system, and a vehicle. The brake (100) includes a hydraulic cylinder (10) having a brake bore (11) and provided with a piston assembly (60) that can move in the axial direction of the brake bore (11), a limit support (20) fixed to the hydraulic cylinder (10) and covering the brake bore (11), a push rod (30) passing through the limit support (20), connected to a piston (12), and adapted to drive the piston assembly (60) to move in the axial direction of the brake bore (11), and an elastic element (40) arranged on the limit support (20) opposite the piston assembly (60) and adapted to abut against the piston assembly (60) to limit the piston assembly (60).

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This disclosure claims priority to and the benefit of Chinese Patent Application No. 202211613491.8, filed December 15, 2022. The entire contents of the above-referenced application are incorporated herein by reference.

[0002] The present disclosure relates to the field of vehicles, and more particularly to brakes, brake systems, and vehicles. [Background technology]

[0003] In the prior art, an existing brake includes a hydraulic cylinder, a piston, and a limit support. The piston is movably disposed within the hydraulic cylinder. The piston is in transmission connection with a vehicle's brake pedal. During brake pedal return, the piston collides with the limit support. The piston makes firm contact with the limit support, causing loud brake operating noise and generating abnormal sounds during brake pedal return. In this way, the noise, vibration, and harshness (NVH) performance of the entire vehicle is reduced. Summary of the Invention

[0004] The present disclosure is intended to solve at least one of the technical problems in the prior art to some extent.

[0005] Therefore, an object of the present disclosure is to provide a brake in which a piston assembly of the brake abuts against a resilient element during brake pedal return, which can reduce impact noise during piston assembly return, thereby improving the overall vehicle NVH performance.

[0006] Another object of the present disclosure is to provide a braking system.

[0007] Another object of the present disclosure is to provide a vehicle.

[0008] The brake according to the present disclosure comprises a hydraulic cylinder, a limit support, a push rod, and a resilient element.

[0009] The hydraulic cylinder has a brake bore with a piston assembly that is movable along the axis of the brake bore.

[0010] The limiting support is fixed to the hydraulic cylinder and covers the brake hole.

[0011] A push rod passes through the limit support and is connected to a piston assembly, the push rod being configured to drive the piston assembly to move axially along the brake bore.

[0012] The elastic element is disposed on the limit support opposite the piston assembly, and is configured to abut against the piston assembly to restrict the piston assembly.

[0013] According to the brake disclosed herein, an elastic element is arranged to avoid a direct collision between the piston assembly and the limit support, and the piston assembly abuts against the elastic element during the return of the vehicle's brake pedal, which can reduce the impact noise during the return of the piston assembly, thereby improving the NVH performance of the entire vehicle.

[0014] A brake system according to the present disclosure includes the brake described above.

[0015] According to the brake system of the present disclosure, impact noise during piston return can be reduced, thereby reducing operating noise of the brake system and improving the NVH performance of the overall vehicle.

[0016] A vehicle according to the present disclosure includes the brake system described above.

[0017] According to the vehicle of the present disclosure, the aforementioned braking system is arranged to thereby improve the NVH performance of the overall vehicle.

[0018] Other aspects and advantages of the disclosure will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the disclosure. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is an exploded view of a hydraulic cylinder, a push rod, a piston, a resilient element, and a limit support according to an embodiment of the present disclosure. [Figure 2] FIG. 1 is a cross-sectional view of a limiting support according to an embodiment of the present disclosure. [Figure 3] 1 is a schematic diagram of an elastic element according to an embodiment of the present disclosure. [Figure 4] FIG. 10 is a schematic diagram of an elastic element according to an embodiment of the present disclosure from another angle. DETAILED DESCRIPTION OF THE INVENTION

[0020] The following describes in detail the embodiments of the present disclosure. Examples of the embodiments are shown in the accompanying drawings, and the same or similar reference symbols in all the accompanying drawings indicate the same or similar components, or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are used only to explain the present disclosure, and should not be construed as limitations on the present disclosure.

[0021] 1-4, a brake 100 according to an embodiment of the present disclosure will be described below. The brake 100 may be mounted on a vehicle. However, the present disclosure is not limited thereto. The brake 100 may also be disposed on another device requiring the brake 100. The present disclosure will be described by using the brake 100 disposed on a vehicle as an example.

[0022] As shown in FIGS. 1 to 4 , a brake 100 according to an embodiment of the present disclosure includes a hydraulic cylinder 10, a limit support 20, a push rod 30, and an elastic element 40. The hydraulic cylinder 10 has a brake bore 11. The brake bore 11 is provided with a piston assembly 60 that can move along the axial direction of the brake bore 11, which may also be understood as the piston assembly 60 being movable relative to the hydraulic cylinder 10 along the axial direction of the brake bore 11. A portion of the structure of the piston assembly 60 is mounted within the brake bore 11. The limit support 20 is fixed to the hydraulic cylinder 10 and covers the brake bore 11. It should be noted that the limit support 20 is disposed outside the hydraulic cylinder 10. The limit support 20 may be fixedly mounted on the hydraulic cylinder 10 by a threaded fastener (e.g., a bolt or a screw). Alternatively, the limit support 20 may be clamped onto the hydraulic cylinder 10. The push rod 30 passes through the limit support 20 and is connected to the piston assembly 60. The push rod 30 is configured to drive the piston assembly 60 to move along the axial direction of the brake bore 11. It should be noted that one end of the push rod 30 may be directly or indirectly connected to a brake pedal of the vehicle, and the other end of the push rod 30 may be directly or indirectly connected to the piston assembly 60. When the brake pedal is depressed, the push rod 30 drives the piston assembly 60 to move within the brake bore 11 along a direction away from the limit support 20. During the return of the brake pedal, the push rod 30 drives the piston assembly 60 to move within the brake bore 11 along a direction toward the limit support 20.

[0023] The elastic element 40 is an elastic member. For example, the elastic element 40 may be a rubber member. However, the present disclosure is not limited thereto. Alternatively, the elastic element 40 may be made of another elastic material. The elastic element 40 is disposed on the limit support 20, and the elastic element 40 is disposed opposite the piston assembly 60. The elastic element 40 is configured to abut against the piston assembly 60 to restrict the piston assembly. It should be noted that the elastic element 40 may be fixedly attached to the limit support 20. The elastic element 40 and the limit support 20 may be integrally formed. Alternatively, the elastic element 40 may be removably attached to the limit support 20. The present disclosure will be described by using the elastic element 40 removably attached to the limit support 20 as an example. The elastic element 40 is disposed opposite the piston assembly 60 along the axial direction of the brake bore 11.

[0024] When the brake pedal is depressed, the push rod 30 drives the piston assembly 60 to move within the brake bore 11 along a direction away from the limit support 20. During the return of the brake pedal, the push rod 30 drives the piston assembly 60 to move within the brake bore 11 along a direction toward the limit support 20. When the piston assembly 60 returns to its original position, the piston assembly 60 abuts against and restricts the elastic element 40. The elastic element 40 stops the piston assembly 60 to avoid a direct collision between the piston assembly 60 and the limit support 20. Due to the specific elasticity of the elastic element 40, the elastic element 40 can absorb collision energy. This can reduce the collision noise during the return of the piston assembly 60, thereby improving the NVH performance of the entire vehicle. Furthermore, the brake 100 of the present disclosure has a simple structure and is easy to assemble.

[0025] Therefore, to avoid a direct collision between the piston assembly 60 and the limit support 20, the elastic element 40 is arranged, and the piston assembly 60 abuts against the elastic element 40 during the return of the vehicle's brake pedal, which can reduce the collision noise during the return of the piston assembly 60, thereby improving the NVH performance of the entire vehicle.

[0026] In some embodiments of the present disclosure, as shown in FIG. 1 , the piston assembly 60 includes the piston 12 and the sleeve 13. The sleeve 13 is fixed to an end of the piston 12 along the axial direction of the piston 12. The elastic element 40 is configured to abut the sleeve 13 to restrict the sleeve. The brake further includes a support rod hole adjacent to the brake hole 11. The axis of the support rod hole is parallel to the axis of the brake hole 11. The brake further includes a support rod 14 fixedly connected to the piston assembly 60. The support rod 14 is fixedly connected to the sleeve 13. The axis of the support rod 14 is parallel to the axis of the piston 12. When the push rod 30 drives the piston assembly 60 to move along the axial direction of the brake hole 11, the support rod 14 moves together along the axis of the support rod hole. The brake further includes a signal generator (e.g., a magnet) and a signal receiver that senses the signal generator. The signal generator is fixedly connected to the support rod 14. The signal receiver is disposed on the hydraulic cylinder 10. The signal receiver is configured to detect a displacement signal after the sleeve 13 is separated from the elastic element 40. During the return of the brake pedal, the push rod 30 drives the piston assembly 60 to move within the brake bore 11 along a direction approaching the limit support 20. When the piston assembly 60 returns to its original position, the sleeve 13 abuts and limits the elastic element 40.

[0027] In some embodiments of the present disclosure, as shown in FIG. 1 , the limit support 20 has an end wall 21 facing the piston assembly 60. The elastic element 40 is disposed on the end wall 21. The push rod 30 passes through the elastic element 40. As shown in FIGS. 1 and 2 , the limit support 20 defines a mounting groove 23 that is open at one end. The bottom wall of the mounting groove 23 defines the end wall 21 facing the piston assembly 60. A flange mounting portion 24 is disposed on the end of the side wall of the mounting groove 23 away from the end wall 21. The flange mounting portion 24 is fixedly connected to the hydraulic cylinder 10. The flange mounting portion 24 may be mounted on the hydraulic cylinder 10 by bolts or screws. The elastic element 40 is mounted on the limit support 20. The elastic element 40 is sleeve-like on the outer surface of the push rod 30, whereby the push rod 30 passes through the elastic element 40. The elastic element 40 is disposed on the end wall 21, and the push rod 30 passes through the elastic element 40, thereby connecting the push rod 30 to the piston assembly 60. This allows the elastic element 40 and the push rod 30 to be appropriately positioned, thereby reducing the difficulty of manufacturing the brake 100.

[0028] In some embodiments of the present disclosure, as shown in FIG. 1 , a first assembly hole 22 is provided in the end wall 21 of the limit support 20. A resilient element 40 is mounted within the first assembly hole 22. In some embodiments of the present disclosure, the resilient element 40 is sleeved over the first assembly hole 22, which may also be understood as the resilient element 40 being disposed within the first assembly hole 22. A second assembly hole 41 is provided in the resilient element 40. The push rod 30 passes through the second assembly hole 41. The first assembly hole 22 passes through the end wall 21 of the limit support 20 along the thickness direction of the end wall 21. The second assembly hole 41 passes through the resilient element 40 along the axial direction of the resilient element 40. The central axis of the second assembly hole 41 is parallel to the central axis of the first assembly hole 22. Furthermore, the central axis of the second assembly hole 41 is collinear with the central axis of the first assembly hole 22. With such an arrangement, the elastic element 40 can be mounted on the end wall 21 of the limit support 20 and the push rod 30 can pass through the elastic element 40 as well.

[0029] In some embodiments of the present disclosure, as shown in FIGS. 1-3 , the elastic element 40 may include a sleeve body 42 and a first limit flange 43. The inner ring wall of the sleeve body 42 forms a second assembly hole 41. The sleeve body 42 is mounted within the first assembly hole 22. It should be noted that the sleeve body 42 is mounted within the first assembly hole 22 and defines the second assembly hole 41. The second assembly hole 41 passes through the sleeve body 42 along the axial direction of the elastic element 40. The first limit flange 43 is disposed on an outer circumferential wall of the sleeve body 42. The first limit flange 43 extends from the outer circumferential wall of the sleeve body 42 around the sleeve body 42. The first limit flange 43 is configured to abut against the sleeve 13 of the piston assembly 60 to restrict the piston assembly. Furthermore, the first limit flange 43 and the sleeve body 42 may be integrally formed. The first limit flange 43 is disposed around the sleeve body 42 along the circumferential direction of the sleeve body 42. During the return of the brake pedal, the push rod 30 drives the piston 12 to move within the brake bore 11 along a direction approaching the limit support 20. When the piston 12 returns to its original position, the sleeve 13 abuts against the first limit flange 43. This can avoid a collision between the piston assembly 60 and the limit support 20.

[0030] In some embodiments of the present disclosure, as shown in FIGS. 3 and 4 , the first limit flange 43 has a first side 431 and a second side 432 arranged oppositely along the axial direction of the elastic element 40. The first side 431 abuts the end wall 21. The second side 432 is configured to abut against the piston assembly 60. After the elastic element 40 is installed in the first assembly hole 22, the first limit flange 43 is positioned within the installation groove 23. The first side 431 of the first limit flange 43 is arranged opposite the end wall 21. The first side 431 of the first limit flange 43 abuts against the inner surface of the end wall 21. The second side 432 of the first limit flange 43 is arranged opposite the piston assembly 60. During brake pedal return, the push rod 30 drives the piston 12 to move within the brake hole 11 along a direction approaching the limit support 20. When the piston 12 returns to its original position, the piston assembly 60 abuts against the second side surface 432, thereby making surface contact between the piston assembly 60 and the elastic element 40. This can ensure a contact area between the piston assembly 60 and the elastic element 40 so that the elastic element 40 can better restrict the piston 12. In this way, collisions between the piston assembly 60 and the limit support 20 can be further avoided, thereby further improving the NVH performance of the entire vehicle.

[0031] In some embodiments of the present disclosure, a limiting structure configured to increase the roughness of the second side surface 432 is disposed on the second side surface 432. The limiting structure may be disposed as at least one of a printed groove structure recessed toward the inside of the first limiting flange 43 and a printed protrusion structure protruding from the first limiting flange 43. The limiting structure is disposed on the second side surface 432 such that the roughness of the second side surface 432 can be increased. In this manner, when the piston assembly 60 contacts the second side surface 432, the friction of the contact surface between the second side surface 432 and the piston assembly 60 can be increased, thereby avoiding slippage between the piston assembly 60 and the elastic element 40.

[0032] 3 and 4 , at least one avoidance groove 433 may be arranged on the second side surface 432. The number of the avoidance grooves 433 arranged on the second side surface 432 may be one or more. The avoidance grooves 433 are arranged on the second side surface 432 so that the contact area between the elastic element 40 and the piston assembly 60 can be reduced and the adhesion between the elastic element 40 and the piston assembly 60 can be relaxed. In this way, when the piston assembly 60 collides with the elastic element 40, the impact noise during the return of the piston assembly 60 can be further reduced, thereby further improving the NVH performance of the entire vehicle.

[0033] In some embodiments of the present disclosure, as shown in FIGS. 3 and 4 , a plurality of avoidance grooves 433 may be provided. The plurality of avoidance grooves 433 are continuously spaced apart along the circumferential direction of the first limit flange 43 to form a boss 44 between two adjacent avoidance grooves 433. Furthermore, the plurality of avoidance grooves 433 are continuously and uniformly spaced apart along the circumferential direction of the first limit flange 43. The spacing between any two adjacent avoidance grooves 433 is the same. The plurality of avoidance grooves 433 are disposed on the second side surface 432, and a boss 44 is formed between the two adjacent avoidance grooves 433. In this manner, when the piston assembly 60 collides with the first limit flange 43, the boss 44 comes into contact with the piston assembly 60, thereby further reducing the contact area between the elastic element 40 and the piston assembly 60 and further loosening the adhesion between the elastic element 40 and the piston assembly 60. In this way, when the piston assembly 60 collides with the elastic element 40, the impact noise during the return of the piston assembly 60 can be further reduced, thereby further improving the NVH performance of the overall vehicle.

[0034] In some embodiments of the present disclosure, as shown in FIG. 4 , each of the bosses 44 has a first surface 441 and a second surface 442 that are disposed oppositely along the circumferential direction of the first limiting flange 43. An angle β is formed between the first surface 441 and the second surface 442 of at least one of the bosses 44. Furthermore, the angle β is formed between the first surface 441 and the second surface 442 of each of the bosses 44, and β is 0°<β. Such an arrangement can enhance the structural strength of the boss 44, thereby reducing the deformation of the elastic element 40. However, the present disclosure is not limited thereto. The first surface 441 and the second surface 442 of the boss 44 may be parallel to each other, in which case β is 0°.

[0035] In some embodiments of the present disclosure, as shown in FIGS. 2 and 3 , the first assembly hole 22 has a first hole section 221 and a second hole section 222 connected to each other, and the first hole section 221 is located at the end of the second hole section 222 closer to the hydraulic cylinder 10. As shown in FIG. 2 , the first hole section 221 is located at the end of the second hole section 222 closer to the mounting groove 23. The diameter of the first hole section 221 is larger than the diameter of the second hole section 222. The first limit flange 43 is assembled within the first hole section 221. The shape of the first limit flange 43 matches the shape of the first hole section 221. For example, when the first limit flange 43 is circular, the first hole section 221 is a circular hole. The outer diameter of the first limit flange 43 is equal to or smaller than the diameter of the first hole section 221. Such an arrangement can ensure that the first limiting flange 43 is assembled within the first hole section 221 .

[0036] Furthermore, after the first limiting flange 43 is assembled within the first hole section 221, the first limiting flange 43 may have an interference fit with the first hole section 221, thereby allowing the elastic element 40 to be securely assembled within the first assembly hole 22.

[0037] 2 and 3, the thickness A of the first limit flange 43 and the depth B of the first hole section 221 satisfy the relationship: B≦A. With such an arrangement, after the first limit flange 43 is assembled into the first hole section 221, the first limit flange 43 can be parallel to the inner surface of the end wall 21, or the first limit flange 43 can protrude from the inner surface of the end wall 21. In this way, it can be ensured that the piston 12 does not collide with the limit support 20 when the piston 12 returns to its original position.

[0038] In some embodiments of the present disclosure, as shown in FIGS. 1 to 3 , the elastic element 40 may further include a second limit flange 45. The second limit flange 45 is disposed on the outer circumferential wall of the sleeve body 42. The second limit flange 45 extends from the outer circumferential wall of the sleeve body 42 around the sleeve body 42. The second limit flange 45 extends around the sleeve body 42 in the circumferential direction of the sleeve body 42. The first limit flange 43 and the second limit flange 45 are spaced apart from each other along the axial direction of the elastic element 40. The first limit flange 43 and the second limit flange 45 are disposed at the two axial ends of the elastic element 40, respectively. After the elastic element 40 is mounted on the limit support 20, the second limit flange 45 is located outside the limit support 20 and abuts against the outer wall opposite the end wall 21. The second limit flange 45 abuts against the outer surface of the end wall 21. The first limit flange 43 is located in the mounting groove 23, the first limit flange 43 abuts the inner surface of the end wall 21, and the second limit flange 45 abuts the outer surface of the end wall 21. In this way, the elastic element 40 can be prevented from moving out of the first assembly hole 22, which allows the elastic element 40 to be tightly assembled onto the limit support 20, thereby preventing the limit support 20 from being separated from the elastic element 40.

[0039] In some embodiments of the present disclosure, the outer surface of the elastic element 40 may be provided with an anti-adhesive coating. The anti-adhesive coating may be disposed as a Teflon coating. The anti-adhesive coating is configured to reduce adhesion between the elastic element 40 and a metal member (e.g., the piston 12). In this way, when the piston assembly 60 collides with the elastic element 40, the impact noise during the return of the piston assembly 60 can be further reduced, thereby further improving the NVH performance of the overall vehicle.

[0040] In some embodiments of the present disclosure, the elastic element 40 can withstand a temperature range of at least −40° C. to 120° C. Optional materials for manufacturing the elastic element 40 may include silica gel, ethylene propylene diene monomer, and the like.

[0041] In some embodiments of the present disclosure, the central axis of the limit support 20 is parallel to the central axis of the piston assembly 60. For example, the central axis of the limit support 20 coincides with the central axis of the piston assembly 60. Furthermore, the central axis of the piston assembly 60 is parallel to the central axis of the brake bore 11. For example, the central axis of the piston assembly 60 coincides with the central axis of the brake bore 11. With such an arrangement, the piston assembly 60 and the push rod 30 are easily assembled, and the structure of the brake 100 is simplified, thereby facilitating production and manufacturing of the brake 100.

[0042] Other configurations of brake 100 according to embodiments of the present disclosure, such as piston 12, are known to those skilled in the art and will not be described in detail herein.

[0043] A brake system according to an embodiment of the present disclosure is provided. The brake system may be an electrically controlled brake system or a wire-controlled brake system. The brake system includes the brake 100 according to the above-described embodiment. This can reduce impact noise during return of the piston 12, reduce operating noise of the brake system, and thereby improve the NVH performance of the entire vehicle.

[0044] A vehicle according to an embodiment of the present disclosure is provided, the vehicle including a brake system according to any of the preceding embodiments, thereby improving the overall vehicle NVH performance.

[0045] In describing the present disclosure, the use of reference terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "particular examples," or "some examples" means that the particular features, structures, materials, or characteristics described with reference to an embodiment or example are included in at least one embodiment or example of the present disclosure. In this disclosure, general descriptions of such terms do not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0046] While embodiments of the present disclosure have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the present disclosure, and that the scope of the present disclosure is defined by the appended claims and their equivalents.

Claims

1. a hydraulic cylinder (10) having a brake bore (11) provided with a piston assembly (60) movable along the axial direction of the brake bore (11); a limiting support (20) fixed to the hydraulic cylinder (10) and covering the brake hole (11); a push rod (30) passing through the limit support (20), connected to the piston assembly (60), and configured to drive the piston assembly (60) to move along the axial direction of the brake bore (11); an elastic element (40) disposed on the limiting support (20) opposite the piston assembly (60) and configured to abut against the piston assembly (60) to limit the piston assembly (60); A brake (100).

2. 2. The brake (100) of claim 1, wherein the limit support (20) has an end wall (21) facing the piston assembly (60), the elastic element (40) is disposed on the end wall (21), and the push rod (30) passes through the elastic element (40).

3. 3. The brake (100) of claim 2, wherein the end wall (21) is provided with a first assembly hole (22), the elastic element (40) is mounted in the first assembly hole (22), the elastic element (40) is provided with a second assembly hole (41), and the push rod (30) passes through the second assembly hole (41).

4. 4. The brake (100) of claim 3, wherein the elastic element (40) comprises a sleeve body (42) and a first limit flange (43), an inner ring wall of the sleeve body (42) defining the second assembly hole (41), the first limit flange (43) extending from an outer circumferential wall of the sleeve body (42) around the sleeve body (42), and the first limit flange (43) configured to abut against the piston assembly (60) to restrict the piston assembly (60).

5. 5. The brake (100) of claim 4, wherein the resilient element (40) is sleeved in the first assembly hole (22).

6. 5. The brake (100) of claim 4, wherein the first limiting flange (43) has a first side (431) and a second side (432) arranged oppositely along the axial direction of the elastic element (40), the first side (431) being configured to abut against the end wall (21) and the second side (432) being configured to abut against the piston assembly (60).

7. The brake (100) of claim 6, wherein a limiting structure is disposed on the second side (432) configured to increase the roughness of the second side (432).

8. 8. The brake (100) according to claim 6 or 7, wherein at least one avoidance groove (433) is arranged on said second side (432).

9. 9. The brake (100) of claim 8, wherein a plurality of avoidance grooves (433) are provided, the plurality of avoidance grooves (433) being spaced apart and successively arranged along the circumferential direction of the first limit flange (43) to form a boss (44) between two adjacent avoidance grooves (433).

10. 10. The brake (100) of claim 9, wherein each boss (44) has a first surface (441) and a second surface (442) arranged oppositely along the circumferential direction of the first limiting flange (43), and an angle β is formed between the first surface (441) and the second surface (442) of at least one boss (44).

11. 11. The brake (100) according to claim 4, wherein the first assembly hole (22) has a first hole section (221) and a second hole section (222) connected to each other, the first hole section (221) being located at an end of the second hole section (222) closer to the hydraulic cylinder (10), the diameter of the first hole section (221) being larger than the diameter of the second hole section (222), and the first limit flange (43) being assembled in the first hole section (221).

12. 12. The brake (100) of claim 11, wherein a thickness A of the first limiting flange (43) and a depth B of the first bore section (221) satisfy the relationship B≦A.

13. 13. The brake (100) according to any one of claims 4 to 12, wherein the elastic element (40) further comprises a second limit flange (45), the second limit flange (45) extending from the outer circumferential wall of the sleeve body (42) around the sleeve body (42), the first limit flange (43) and the second limit flange (45) being spaced apart from each other along the axial direction of the elastic element (40), and the second limit flange (45) being located outside the limit support (20) and abutting an outer wall opposite the end wall (21).

14. Brake (100) according to any one of claims 1 to 13, wherein the outer surface of the elastic element (40) is provided with an anti-adhesion coating.

15. 14. The brake (100) of any one of claims 1 to 13, wherein the piston assembly (60) comprises a piston (12) and a sleeve (13), the sleeve (13) is fixed to an end of the piston (12) along an axial direction of the piston (12), and the elastic element (40) is configured to abut against the sleeve (13) to restrict the sleeve (13).

16. further comprising a support rod hole adjacent to the brake hole (11), the axis of the support rod hole being parallel to the axis of the brake hole (11); a support rod (14) fixedly connected to the piston assembly (60), the support rod (14) being fixedly connected to the sleeve (13), the axis of the support rod (14) being parallel to the axis of the piston (12), and when the push rod (30) drives the piston assembly (60) to move along the axial direction of the brake bore (11), the support rod (14) moves together along the axis of the support rod bore; 16. The brake (100) of claim 15, further comprising a signal generator and a signal receiver sensitive to the signal generator, the signal generator fixedly connected to the support rod (14), the signal receiver disposed on the hydraulic cylinder (10), and the signal receiver configured to detect a displacement signal after the sleeve (13) is separated from the elastic element (40).

17. A braking system comprising a brake (100) according to any one of claims 1 to 16.

18. A vehicle comprising a braking system according to claim 17.

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