A band spring brake and its braking system

Abstract

The present invention relates to the field of vehicle technology, and more specifically, to a strip spring brake and its braking system. The strip spring brake comprises a support assembly, a pressure rod, two brake assemblies, and a rebound assembly. The pressure rod is connected to the support assembly. The brake assembly comprises a drive unit, a base unit, and a friction plate, wherein the drive unit is drive-connected to the base unit, and the friction plate is connected to the base unit. The pressure rod is slidably connected to the base unit. The rebound assembly comprises a support unit and two first rebound units, wherein one end of the first rebound unit is connected to the support unit and the other end abuts the friction plate. The support unit is connected to the pressure rod and abuts the base unit along a second direction. In the braking state, the first abutment and the second abutment move in the same direction until the distance between the first abutment and the central axis of the drive unit is smaller than the distance between the second abutment and the central axis of the drive unit. This solves the problem of how to make the elastic force of the strip spring brake shrapnel sufficient under cost constraints.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a band spring brake and a braking system thereof. Background Art

[0002] Currently, a vehicle's disc brake primarily consists of a brake disc and a brake caliper, with the latter being connected to the vehicle's wheel. During braking, a piston in the caliper drives the friction pad until it contacts the disc. The friction generated between the two reduces the disc's rotational speed, thereby slowing or stopping the vehicle. To release the brake, a spring in the caliper activates, moving the friction pad, restoring the gap between the pad and disc, allowing the vehicle to resume normal driving.

[0003] However, to improve the friction pad's response speed when the brake is released, increasing the spring force of the spring is often used. However, this approach presents practical problems. Increasing the spring force of the spring requires optimization in material selection and structural design, which undoubtedly increases the complexity of the production process and significantly increases production costs. The key issue is that while ensuring the friction pad's response speed when the brake is released, existing technologies that increase the spring force of the spring are difficult to strike a balance between performance improvement and cost control. Summary of the Invention

[0004] In order to solve the problem of how to ensure sufficient elastic force of a spring band brake shrapnel under cost constraints, the present invention provides a spring band brake and a braking system thereof.

[0005] In a first aspect, the present invention provides a band spring brake, comprising:

[0006] Support assembly;

[0007] A pressure rod connected to the support assembly;

[0008] Two brake assemblies, each comprising a drive unit, a base unit, and a friction plate; the drive unit is drivingly connected to the base unit; the friction plate is connected to the base unit; the two brake assemblies are symmetrically spaced along a first direction; the pressure rod is slidably connected to the base unit;

[0009] The rebound assembly comprises a support unit and two first rebound units; one end of the first rebound unit is connected to the support unit, and the other end extends in a direction away from the support unit; the ends of the two first rebound units away from the support unit are respectively abutted against one side of the two friction plates close to the support unit; at least part of the first rebound units is arranged in the space between the two base units; the end of the support unit away from the first rebound unit is abutted against one side of the base unit along the second direction; the abutment point between one first rebound unit and the base unit is a first abutment point; the abutment point between the other first rebound unit and the base unit is a second abutment point; the support unit is connected to the pressure rod; the second direction is the width direction of the base unit;

[0010] The strip spring brake includes a braking state; the braking state includes the first rebound unit applying a force to the base unit abutting against it to move away from the other base unit, the driving unit driving the two friction plates to move closer to each other, and the first abutment and the second abutment moving in the same direction to S1 < S2; wherein S1 is the distance between the first abutment and the central axis of the driving unit, and S2 is the distance between the second abutment and the central axis of the driving unit; the central axis of the driving unit is parallel to the first direction.

[0011] In some embodiments, the rebound assembly further comprises a second rebound unit; the first rebound unit, the support unit, and the second rebound unit are sequentially connected along a third direction; the second rebound unit abuts against a side of the base unit close to the friction plate at one end away from the support unit; at least a portion of the second rebound unit is disposed in a space between the two base units; the second rebound unit exerts a force on the base unit abutting against it to move away from the other base unit; the abutment point between the second rebound unit and the base unit is a third abutment point; the third abutment point and the first abutment point are located on the same base unit; the third direction is the length direction of the base unit;

[0012] The braking state further includes the second rebound unit applying a force to the base unit abutting against the second rebound unit to move the base unit away from the other base unit.

[0013] In some embodiments, the braking state further includes the first abutment, the second abutment, and the third abutment moving in the same direction to S1 < S3; wherein S3 is the distance between the third abutment and the central axis of the drive unit.

[0014] In some embodiments, the rebound assembly includes two second rebound units; one end of one second rebound unit is connected to the end of the support unit away from the first rebound unit, and the other end abuts against one base unit; one end of the other second rebound unit is connected to the end of the support unit away from the first rebound unit, and the other end abuts against another base unit; the abutment between one second rebound unit and one base unit is the third abutment; the abutment between the other second rebound unit and the other base unit is the fourth abutment; the fourth abutment and the first abutment are located on the same base unit;

[0015] The braking state also includes the first abutment, the second abutment, the third abutment, and the fourth abutment moving in the same direction to S3>MAX(S1, S4), S4<MIN(S2, S3); wherein S4 is the distance between the fourth abutment and the central axis of the drive unit.

[0016] In some embodiments, the distance between the end of the first rebound unit close to the support unit and the set reference line is smaller than the distance between the end of the first rebound unit away from the support unit and the set reference line; wherein, the set reference line is parallel to the first direction and vertically arranged on the left side of the first rebound unit.

[0017] In some embodiments, the support unit includes a first support module, a rebound module, and a second support module; the first support module, the rebound module, and the second support module are connected in sequence; the ends of the two first rebound units away from the base unit are respectively connected to the second support modules; the second support module is movably connected to the pressure rod; the first support module abuts against one side of the base unit along the third direction; the first support module applies a force to the base unit in a direction away from the first support module; the rebound module and the friction plate are spaced apart.

[0018] In some embodiments, the first support module includes a support body and a support foot; the support body is connected to one end of the rebound module away from the second support module; one end of the support foot is connected to the support body, and the other end abuts against one side of the base unit along the third direction; the support foot applies a force to the base unit in a direction away from the first support module.

[0019] In some embodiments, the rebound module includes a first spring clip, a second spring clip, a third spring clip, and a fourth spring clip; the first support module, the first spring clip, the second spring clip, the third spring clip, the fourth spring clip, and the second support module are connected in sequence; the first spring clip extends away from one end of the first support module and the third spring clip extends away from one end of the first support module respectively in a direction away from the brake assembly; the second spring clip extends away from one end of the first support module and the fourth spring clip extends away from one end of the first support module respectively in a direction close to the brake assembly.

[0020] In some embodiments, the second support module includes a clamping groove, a first extension piece, and a second extension piece; the clamping groove is connected to the end of the rebound module away from the first support module; the clamping groove is recessed toward the direction close to the brake assembly to form a recessed side; the recessed side is movably connected to the pressure rod; one end of the first extension piece is connected to the end of the clamping groove away from the first support module, and the other end extends toward the end close to the first support module; the pressure rod is arranged in the space surrounded by the clamping groove and the first extension piece; one end of the second extension piece is connected to the end of the clamping groove away from the first support module, and the other end extends toward the end away from the first support module; the second extension piece is connected to the first rebound unit.

[0021] In some embodiments, the first rebound unit includes a first arc spring piece, a fifth spring piece, and a first abutting portion; the first arc spring piece is connected to the support unit; the first arc spring piece protrudes in the direction away from the brake assembly to form an arc-shaped thin plate; one end of the fifth spring piece is connected to the first arc spring piece close to the brake assembly, and the other end extends toward the brake assembly; one end of the first abutting portion is connected to the fifth spring piece, and the other end abuts against the base unit; the first arc spring piece and the fifth spring piece drive the first abutting portion to apply a force to the base unit; one abutment between the first abutment portion and the base unit is the first abutment; another abutment between the first abutment portion and the base unit is the second abutment.

[0022] In a second aspect, the present invention provides a braking system, comprising the spring band brake according to any one of the first aspects, and further comprising:

[0023] a brake disc, the brake disc being arranged in the space between the two friction plates;

[0024] The braking state also includes the driving unit driving the two friction plates to move closer to each other until the two friction plates respectively abut against both sides of the brake disc in the thickness direction.

[0025] To solve the problem of how to ensure sufficient elastic force of the strip spring brake shrapnel under cost constraints, the present invention has the following advantages:

[0026] Two first rebound units are respectively abutted against the sides of the two friction plates closest to the support unit. When the vehicle brakes after braking, the first rebound units drive the two friction plates away from each other, separating the friction plates from the brake disc and ensuring the vehicle can continue to move. The end of the support unit, distal to the first rebound unit, abuts against the side of the base unit along the second direction. The support unit is connected to a pressure rod, securing the relative position of the rebound assembly and the base unit, providing support for the first rebound units to drive the friction plates. In the braking state, because the distance between the first abutment and the central axis of the drive unit is smaller than the distance between the second abutment and the central axis of the drive unit, the resistance arm between the first abutment and the drive unit is smaller. Therefore, the first rebound unit adjacent to the first abutment can more easily drive the friction plate on that side away from the other friction plate, enabling it to move more quickly and separate from the brake disc, thereby improving the vehicle's response speed when braking is released. Furthermore, the first rebound unit adjacent to the second abutment extends less from the support unit, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a brake assembly, a rebound assembly, and a pressure rod according to an embodiment is shown;

[0028] Figure 2 A top view of a brake assembly, a rebound assembly, and a pressure rod according to an embodiment is shown;

[0029] Figure 3 A side view of a brake assembly, a rebound assembly, and a plunger according to an embodiment is shown;

[0030] Figure 4 A schematic diagram of a spring band brake according to an embodiment is shown;

[0031] Figure 5 A front view of a rebound assembly according to one embodiment is shown;

[0032] Figure 6 A schematic diagram of a rebound assembly according to an embodiment is shown;

[0033] Figure 7 A side view of a rebound assembly is shown in one embodiment;

[0034] Figure 8 A schematic diagram of a braking system according to an embodiment is shown.

[0035] Figure markings: 01 brake assembly; 11 drive unit; 12 base unit; 121 base plate; 122 guide hole; 13 friction plate; 02 rebound assembly; 21 support unit; 211 first support module; 2111 support body; 2112 support foot; 212 rebound module; 2121 first spring clip; 2122 second spring clip; 2123 third spring clip; 2124 fourth spring clip; 213 second support module; 2131 clamping groove; 2132 first extension piece; 2133 second extension piece; 22 first rebound unit; 221 first arc spring clip; 222 fifth spring clip; 223 first abutting portion; 23 second rebound unit; 231 second arc spring clip; 232 sixth spring clip; 233 second abutting portion; 03 pressure rod; 04 support assembly; 05 brake disc. DETAILED DESCRIPTION

[0036] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the present disclosure, rather than to imply any limitation on the scope of the present disclosure.

[0037] As used herein, the term "including" and its variations are to be interpreted as open-ended terms meaning "including, but not limited to." The term "based on" is to be interpreted as "based, at least in part, on." The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment." The term "another embodiment" is to be interpreted as "at least one other embodiment." Terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "vertical," "horizontal," "transverse," and "longitudinal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily intended to better describe the present application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationships. For example, the term "on" may, in certain circumstances, be used to indicate a dependency or connection relationship. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" are to be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise specified, "plurality" means two or more.

[0038] In this embodiment, the connection structure between the support assembly 04 and the pressure rod 03, as well as the layout of the brake assembly 01, significantly impacts braking performance in the design of a vehicle spring band brake. Existing spring band brakes typically include a support assembly 04, a pressure rod 03, and two spaced-apart brake assemblies 01. Each brake assembly 01 includes a drive unit 11, a base unit 12, and a friction plate 13. The drive unit 11 is drivingly connected to the base unit 12, and the friction plate 13 is connected to the base unit 12. The pressure rod 03 and the base unit 12 are slidably connected to enable dynamic adjustment during braking. However, the response speed of the friction plate 13 during braking is a key factor limiting the performance of spring band brakes. To improve response speed, existing techniques often increase the spring force of the spring plate. However, this approach not only increases manufacturing costs but can also negatively impact the overall structure and reliability of the spring band brake. Therefore, optimizing the design of the rebound assembly 02 to increase the response speed of the friction plate 13 during braking without increasing costs has become a pressing technical challenge in the field of spring band brake design.

[0039] like Figure 1 、 Figure 4 As shown, the strip spring brake may include a support assembly 04, a pressure rod 03, and two brake assemblies 01. The pressure rod 03 may be connected to the support assembly 04. The pressure rod 03 may be as shown in FIG. Figure 3 As shown, the two ends of the hollow cavity of the support assembly 04 are penetrated; the brake assembly 01 may include a drive unit 11, a base unit 12, and a friction plate 13; the drive unit 11 may be driven and connected to the base unit 12, and the drive unit 11 may be arranged on one side of the base unit 12 along a first direction, and the first direction may be the thickness direction of the base unit 12, that is, Figure 2 The left and right directions are shown; the friction plate 13 can be connected to the side of the base unit 12 away from the drive unit 11; the brake assembly 01 can be arranged in the hollow cavity of the support assembly 04, and the two brake assemblies 01 can be symmetrically spaced along the first direction, and the brake disc 05 can be arranged in the space between the two brake assemblies 01; the pressure rod 03 can be slidably connected to the base unit 12, and the pressure rod 03 can allow the base unit 12 to move only along the first direction, and the drive unit 11 can drive the two friction plates 13 to move toward each other through the base unit 12, so that the friction plate 13 abuts against the brake disc 05 to achieve braking of the vehicle.

[0040] like Figure 3 、 Figure 4As shown, the rebound assembly 02 may include a support unit 21 and two first rebound units 22. The support unit 21 may be connected to the pressure rod 03, one end of the first rebound unit 22 is connected to the support unit 21, and the other end extends away from the support unit 21. The end of the support unit 21 away from the first rebound unit 22 may abut against one side of the base unit 12 along the second direction, and the second direction may be the width direction of the base unit 12, that is, Figure 2 In the up-down direction shown, the base unit 12 can support the support unit 21 , and the support unit 21 can support the first rebound unit 22 . The two first rebound units 22 are respectively in contact with the sides of the two support units 21 close to the friction plates 13 at one end away from the support unit 21, so that the first rebound unit 22 can drive one friction plate 13 to move away from the other friction plate 13 through the base unit 12, so that the friction plate 13 and the brake disc 05 between the two friction plates 13 are spaced apart, so that the vehicle can travel stably; at least part of the first rebound unit 22 can be arranged in the space between the two base units 12, so that the space between the two base units 12 can be fully utilized to achieve the compactness of the strip spring brake; the abutment point between one first rebound unit 22 and the base unit 12 can be a first abutment point; the abutment point between the other first rebound unit 22 and the base unit 12 can be a second abutment point; when the vehicle brakes and the brake is released after braking, the first rebound unit 22 can drive the two friction plates 13 to move away from each other, so that the friction plates 13 and the brake disc 05 are spaced apart, so that the vehicle can travel normally; the end of the support unit 21 away from the first rebound unit 22 can be in contact with the side of the base unit 12 along the second direction (which can be as shown in FIG. Figure 2 The support unit 21 is in contact with the pressure rod 03, and the support unit 21 is connected to the pressure rod 03 to provide stable support when the first rebound unit 22 drives the friction plate 13.

[0041] The strip spring brake may include a braking state; the braking state may include the first rebound unit 22 exerting a force on the base unit 12 abutting therewith to move away from the other base unit 12, the driving unit 11 may drive the two friction plates 13 to move closer to each other, and the first abutment and the second abutment may simultaneously move toward Figure 2The first spring element 22 moves downward to a position S1 < S2, where S1 is the distance between the first abutment point and the central axis of the drive unit 11, and S2 is the distance between the second abutment point and the central axis of the drive unit 11. The central axis of the drive unit 11 is parallel to the first direction. When the spring band brake is released, the drive unit 11 no longer drives the two friction plates 13, and the first rebound element 22 can drive the two friction plates 13 away from each other via the base element 12. In the braking state, the first rebound unit 22 applies a force to the base unit 12 abutting against it to move away from the other base unit 12, and at the same time, the driving unit 11 drives the two friction plates 13 to move closer to each other, so that the two friction plates 13 abut against the brake disc 05 to achieve a braking effect; the first abutment and the second abutment move in the same direction to S1<S2, because the distance between the first abutment and the central axis of the driving unit 11 is smaller than the distance between the second abutment and the central axis of the driving unit 11, the resistance arm between the first abutment and the driving unit 11 is smaller, and the first rebound unit 22 adjacent to the first abutment can more easily drive the friction plate 13 adjacent to the first abutment to move away from the other friction plate 13, so that the friction plate 13 adjacent to the first abutment can move more quickly to a distance from the brake disc 05, thereby improving the response speed of the vehicle to cancel the brake; at the same time, Figure 2 As shown, the length of the first rebound unit 22 adjacent to the first abutment extending from the support unit 21 can be greater than the length of the first rebound unit 22 adjacent to the second abutment extending from the support unit 21, thereby achieving the first abutment and the second abutment moving in the same direction to S1<S2, and the first rebound unit 22 adjacent to the second abutment can be manufactured with less material, thereby achieving the effect of reducing costs.

[0042] In other embodiments, the base unit 12 may include a base plate 121 and a guide hole 122; the guide hole 122 may pass through both sides of the base plate 121 along the first direction. Figure 2 As shown, the driving unit 11 can be connected to the base unit 12 by driving; the driving unit 11, the base plate 121, and the friction plate 13 can be connected in sequence. The pressure rod 03 and the guide hole 122 can be slidably connected to the pressure rod 03, so that the base plate 121 can move along the first direction. The position where a first rebound unit 22 abuts against a base plate 121 can be a first abutment, and the position where another first rebound unit 22 abuts against another base plate 121 can be a second abutment. The end of the support unit 21 away from the first rebound unit 22 can abut against the base plate 121 as shown in FIG. Figure 1 The top end shown is abutted to support the first rebound unit 22 .

[0043] In this embodiment, if Figure 3 、 Figure 4 、 Figure 6As shown, the rebound assembly 02 may further include a second rebound unit 23; the first rebound unit 22, the support unit 21, and the second rebound unit 23 may be sequentially connected along a third direction, and the third direction may be the length direction of the base unit 12, that is, Figure 3 The left and right directions are shown; the second rebound unit 23 can extend away from the end of the support unit 21 to abut against the side of the base unit 12 close to the friction plate 13; at least part of the second rebound unit 23 is arranged in the space between the two base units 12, making full use of the space between the two base units 12 to achieve the compactness of the strip spring brake; the second rebound unit 23 applies a force to the base unit 12 abutting against it to move away from the other base unit 12; the abutment between the second rebound unit 23 and the base unit 12 is the third abutment; the third abutment and the first abutment are located on the same base unit 12. When the brake is released, the second rebound unit 23 and the first rebound unit 22 adjacent to the first abutment can simultaneously drive the friction plate 13 on one side of the first abutment to move away from the other friction plate 13 through the base unit 12, further improving the movement speed and response speed of the friction plate 13 on one side of the first abutment, thereby optimizing the vehicle's handling.

[0044] The braking state may further include the second rebound unit 23 applying a force to the base unit 12 abutting against the second rebound unit 23 to move the second rebound unit 23 away from the other base unit 12 .

[0045] In this embodiment, if Figure 6 、 Figure 7 As shown, the braking state may also include the first abutment, the second abutment, and the third abutment simultaneously moving toward Figure 2 As shown, the distance S1 between the first abutment and the central axis of the drive unit 11 is smaller than the distance S3 between the third abutment and the central axis of the drive unit 11. Since the resistance arm between the first abutment and the drive unit 11 is smaller, the first rebound unit 22 adjacent to the first abutment can easily drive the friction plate 13 adjacent to the first abutment to move away from the other friction plate 13. In addition, the second rebound unit 23 drives the same friction plate 13 in the same direction at the same time, which can further increase the speed at which the friction plate 13 adjacent to the first abutment moves to the distance from the brake disc 05, thereby improving the response speed of the vehicle to cancel the brake. Figure 7 As shown, the length of the first rebound unit 22 adjacent to the first abutment extending from the support unit 21 can be greater than the length of the second rebound unit 23 extending from the support unit 21, thereby achieving S1 < S3 in the braking state, and using less material when manufacturing the second rebound unit 23, which can reduce costs. Figure 3 As shown, the central axis of the driving unit 11 can be disposed between the first rebound unit 22 and the second rebound unit 23 so that the first rebound unit 22 and the second rebound unit 23 are subjected to uniform force.

[0046] In other embodiments, Figure 3 As shown, the brake assembly 01 may include two drive units 11 , and the central axes of the two drive units 11 are evenly arranged between the first rebound unit 22 and the second rebound unit 23 , so that the first rebound unit 22 and the second rebound unit 23 are evenly stressed.

[0047] In this embodiment, if Figure 6 、 Figure 7 As shown, the rebound assembly 02 may include two second rebound units 23; one end of one second rebound unit 23 may be connected to the end of the support unit 21 away from the first rebound unit 22, and the other end may abut against a side of a base unit 12 close to the friction plate 13; one end of another second rebound unit 23 may be connected to the end of the support unit 21 away from the first rebound unit 22, and the other end may abut against a side of another base unit 12 close to the friction plate 13; the abutment point of one second rebound unit 23 and one base unit 12 may be a third abutment point; the other second rebound unit 23 may abut against a side of another base unit 12 close to the friction plate 13; the abutment point of one second rebound unit 23 and one base unit 12 may be a third abutment point; the other second rebound unit 23 may abut against a side of another base unit 12 close to the friction plate 13; the second rebound unit 23 may abut against a base unit 12 ... The point where the second rebound unit 23 abuts against another base unit 12 may be a fourth abutment point; the fourth abutment point and the first abutment point may be located on the same base unit 12. When the brake is released, the second rebound unit 23 adjacent to the fourth abutment point and the first rebound unit 22 adjacent to the first abutment point simultaneously drive the friction plate 13 abutting against the second rebound unit 23 adjacent to the fourth abutment point to move away from the other friction plate 13, thereby increasing the moving speed of the friction plate 13 abutting against the second rebound unit 23 adjacent to the fourth abutment point, so that the vehicle can quickly reach the target speed.

[0048] The braking state may also include the first abutment, the second abutment, the third abutment, and the fourth abutment simultaneously moving toward Figure 2 As shown, the lower part moves to S3>MAX(S1, S4), S4<MIN(S2, S3); wherein S4 is the distance between the fourth abutment and the central axis of the driving unit 11. The first rebound unit 22 adjacent to the first abutment and the second rebound unit 23 adjacent to the third abutment drive one friction plate 13 simultaneously, and the first rebound unit 22 adjacent to the second abutment and the second rebound unit 23 adjacent to the fourth abutment drive the other friction plate 13 simultaneously. When the two friction plates 13 move away from each other, the movement speed is fast, so that the vehicle's response speed to brake release is fast, so that the vehicle can quickly increase to the target speed after brake release. Figure 7As shown, the length of the second rebound unit 23 adjacent to the third abutment extending from the support unit 21 can be respectively less than the length of the first rebound unit 22 adjacent to the first abutment extending from the support unit 21 and the length of the second rebound unit 23 adjacent to the fourth abutment extending from the support unit 21, thereby achieving S3>MAX(S1, S4) in the braking state, and the length of the second rebound unit 23 adjacent to the fourth abutment extending from the support unit 21 can be respectively greater than the length of the first rebound unit 22 adjacent to the second abutment extending from the support unit 21 and the length of the second rebound unit 23 adjacent to the third abutment extending from the support unit 21, thereby achieving S4<MIN(S2, S3) in the braking state, less consumables are used in manufacturing the first rebound unit 22 adjacent to the second abutment and the second rebound unit 23 adjacent to the third abutment, which can reduce costs.

[0049] In other embodiments, the second rebound unit 23 may include a second arc spring piece 231, a sixth spring piece 232, and a second abutting portion 233; the second arc spring piece 231 may be connected to the support unit 21; the second arc spring piece 231 may be convex in a direction away from the brake assembly 01 to form an arc-shaped thin plate, that is, along the Figure 2 One end of the sixth spring piece 232 can be connected to the second arc spring piece 231 close to the brake assembly 01, and the other end can extend toward the direction close to the brake assembly 01, that is, Figure 2 The second abutment portion 233 extends downward as shown; one end of the second abutment portion 233 can be connected to the sixth spring piece 232, and the other end abuts the base unit 12; the second arc spring piece 231 and the sixth spring piece 232 can drive the second abutment portion 233 to apply force to the base unit 12, allowing the second abutment portion 233 to continuously abut against the base unit 12. When the brake is released, the shape of the second arc spring piece 231 can provide elastic force through the sixth spring piece 232, allowing the second abutment portion 233 to drive the two base units 12 away from each other. The second abutment portion 233 wears due to long-term abutment with the base unit 12. The second abutment portion 233 can be made of a wear-resistant material, which can extend the maintenance cycle of the strip spring brake. The point where one second abutment portion 233 abuts the base unit 12 can be the third abutment point; the point where the other second abutment portion 233 abuts the base unit 12 can be the fourth abutment point.

[0050] In this embodiment, if Figure 3 As shown, the distance between the end of the first rebound unit 22 close to the support unit 21 and the set reference line can be smaller than the distance between the end of the first rebound unit 22 away from the support unit 21 and the set reference line; wherein the set reference line can be parallel to the first direction and vertically arranged on the left side of the first rebound unit 22. Figure 3As shown, the set reference line can be vertically set on the left side of the first rebound unit 22, so that the top end of the first rebound unit 22 is closer to the set reference line than the bottom end of the first rebound unit 22.

[0051] When the two friction plates 13 approach each other, the two first rebound units 22 will deform and stretch. Under the action of the support unit 21, this deformation will cause the first rebound unit 22 to move downward away from the lower end of the support unit 21. At the same time, since the force is mutual, the first rebound unit 22 will also have a tendency to move upward. This arrangement allows the first rebound unit 22 to be squeezed by the base unit 12 and then move downward. Figure 5 The upward force component and the leftward force component shown in the figure make it easier for the first rebound unit 22 to move upward. The upward displacement and the downward displacement can be partially offset. Therefore, when the two friction plates 13 approach each other, the area where the two first rebound units 22 move on the base unit 12 is small, reducing wear on the base unit 12.

[0052] In this embodiment, if Figure 5 、 Figure 6 As shown, the support unit 21 may include a first support module 211, a rebound module 212, and a second support module 213; the first support module 211, the rebound module 212, and the second support module 213 may be connected in sequence; the ends of the two first rebound units 22 away from the base unit 12 may be connected to the second support module 213 respectively; the second support module 213 may be movably connected to the pressure rod 03, and when the two friction plates 13 move toward each other, the first rebound unit 22 is extended by the force from the base unit 12, and the end of the first rebound unit 22 away from the support unit 21 will move downward, and at this time, the second support module 213 is movably connected to the pressure rod 03, allowing the second support module 213 close to the first rebound unit 22 to revolve around the pressure rod 03 as shown. Figure 5 The counterclockwise rotation shown in the figure allows the first rebound unit 22 to move upward, and the upward displacement and the downward displacement can be partially offset, so that when the two friction plates 13 approach each other, the area where the two first rebound units 22 move on the base unit 12 is small, reducing the wear on the base unit 12; the first support module 211 can abut against one side of the base unit 12 along the third direction, and the third direction can be the length direction of the base unit 12, that is, Figure 3 The first support module 211 can apply a force to the base unit 12 in a direction away from the first support module 211, such as Figure 2As shown, the first support module 211 can abut against the top of the base unit 12 to provide support; the rebound module 212 can be spaced apart from the friction plate 13. When the two friction plates 13 move toward each other, the space between the rebound module 212 and the friction plate 13 can allow the rebound module 212 to have enough space to deform, thereby allowing the first rebound unit 22 to move up more easily.

[0053] In this embodiment, if Figure 6 As shown, the first support module 211 may include a support body 2111 and a support leg 2112; the support body 2111 may be connected to one end of the rebound module 212 away from the second support module 213; one end of the support leg 2112 may be connected to the support body 2111, and the other end may extend to abut against one side of the base unit 12 along the third direction. Figure 1 As shown, the support foot 2112, which is away from one end of the support body 2111, can extend to abut against the top of the base unit 12, providing support for the rebound module 212. The support foot 2112 can apply a force to the base unit 12 in a direction away from the first support module 211. When the two friction plates 13 move toward each other, the first rebound unit 22 will be deformed and extended by the force from the base unit 12. The support foot 2112 can be compressed to allow the support body 2111 to move toward the base unit 12. At the same time, the rebound module 212 can also be deformed. The support foot 2112 and the rebound module 212 allow the first rebound unit 22 to move upward, thereby offsetting the amount of downward movement of the first rebound unit 22 due to the force, reducing the range of movement of the first rebound unit 22 on the base unit 12 and reducing wear on the base unit 12.

[0054] In this embodiment, if Figure 5 、 Figure 6 、 Figure 7 As shown, the rebound module 212 may include a first spring piece 2121, a second spring piece 2122, a third spring piece 2123, and a fourth spring piece 2124; the first support module 211, the first spring piece 2121, the second spring piece 2122, the third spring piece 2123, the fourth spring piece 2124, and the second support module 213 may be connected in sequence; the first spring piece 2121 away from one end of the first support module 211 and the third spring piece 2123 away from one end of the first support module 211 may extend in a direction away from the brake assembly 01; the second spring piece 2122 away from one end of the first support module 211 and the fourth spring piece 2124 away from one end of the first support module 211 may extend in a direction close to the brake assembly 01. After the first rebound unit 22 is squeezed by the base unit 12, the first rebound unit 22 may be as shown in FIG. Figure 5 The top end shown in FIG2 can move upward, and when the first rebound unit 22 moves, the first spring piece 2121, the second spring piece 2122, the third spring piece 2123, and the fourth spring piece 2124 are easily deformed, so that the first rebound unit 22 can be deformed. Figure 5 The top end shown can move upward more easily, thereby offsetting the downward movement of the first rebound unit 22 due to the force, so that the first rebound unit 22 has a smaller movement range on the base unit 12 and reduces the wear of the base unit 12.

[0055] In this embodiment, if Figure 5 、 Figure 6 、 Figure 7 As shown, the second support module 213 may include a pressing groove 2131, a first extension piece 2132, and a second extension piece 2133. The pressing groove 2131 may be connected to the end of the rebound module 212 away from the first support module 211; the pressing groove 2131 may be concave toward the direction close to the brake assembly 01 to form a concave side, that is, Figure 5 As shown, the recessed side is formed in the direction from top to bottom; the recessed side can be movably connected to the pressure rod 03; one end of the first extension piece 2132 can be connected to the end of the clamping groove 2131 away from the first support module 211, and the other end can extend toward the end close to the first support module 211; the pressure rod 03 can be arranged in the space surrounded by the clamping groove 2131 and the first extension piece 2132. When the second support module 213 rotates around the pressure rod 03, the pressure rod 03 can be prevented from being separated from the second support module 213; one end of the second extension piece 2133 can be connected to the end of the clamping groove 2131 away from the first support module 211, and the other end can extend in the direction away from the first support module 211; the end of the second extension piece 2133 away from the first support module 211 can be connected to the first rebound unit 22. When the two friction plates 13 move closer to each other and the first rebound unit 22 is deformed, the second support module 213 can rotate around the pressure rod 03. The pressure rod 03 is set in the space surrounded by the clamping groove 2131 and the first extension plate 2132 to prevent the pressure rod 03 from being separated from the second support module 213, thereby ensuring that after the brake is released, the first rebound unit 22 can quickly drive the two friction plates 13 to move away from each other.

[0056] In this embodiment, if Figure 5 、 Figure 6 、 Figure 7 As shown, the first rebound unit 22 may include a first arc spring piece 221, a fifth spring piece 222, and a first abutting portion 223; the first arc spring piece 221 may be connected to the support unit 21; the first arc spring piece 221 may be convex in a direction away from the brake assembly 01 to form an arc-shaped thin plate, that is, Figure 2 One end of the fifth spring piece 222 can be connected to the first arc spring piece 221 close to the brake assembly 01 direction, and the other end can extend toward the direction close to the brake assembly 01, that is, Figure 2The first abutment portion 223 extends downward as shown; one end of the first abutment portion 223 can be connected to the fifth spring piece 222, and the other end abuts the base unit 12; the first arc spring piece 221 and the fifth spring piece 222 can drive the first abutment portion 223 to apply force to the base unit 12, allowing the first abutment portion 223 to continuously abut against the base unit 12. When the brake is released, the shape of the first arc spring piece 221 can provide elastic force through the fifth spring piece 222, allowing the first abutment portion 223 to drive the two base units 12 away from each other. The first abutment portion 223 wears due to long-term abutment with the base unit 12. Using a wear-resistant material for the first abutment portion 223 can extend the maintenance cycle of the strip spring brake. The point where one first abutment portion 223 abuts the base unit 12 can be the first abutment portion; the point where the other first abutment portion 223 abuts the base unit 12 can be the second abutment portion.

[0057] In this embodiment, a braking system is provided. The braking system is applied to any of the strip spring brakes in the above embodiments, such as Figure 8 As shown, the braking system may further include a brake disc 05. Brake disc 05 may be positioned within the space between the two friction pads 13. Brake disc 05 may be connected to the vehicle's wheels and rotate at the same speed as the wheels. During normal vehicle operation, brake disc 05 is spaced from the two friction pads 13 and rotates synchronously with the wheels, preventing interference between the brake disc 05 and the friction pads 13.

[0058] The braking state can also include the drive unit 11 driving the two friction plates 13 to move closer to each other until the two friction plates 13 respectively abut against both sides of the brake disc 05 in the thickness direction, so that the two friction plates 13 clamp the brake disc 05, thereby generating a friction torque to prevent the brake disc 05 from rotating, thereby preventing the wheel from rotating and achieving braking.

[0059] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and that in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A band spring brake, characterized in that: The band spring brake comprises: Support assembly; A pressure rod connected to the support assembly; Two brake assemblies, each comprising a drive unit, a base unit, and a friction plate; the drive unit is drivingly connected to the base unit; the friction plate is connected to the base unit; the two brake assemblies are symmetrically spaced along a first direction; the pressure rod is slidably connected to the base unit; The rebound assembly comprises a support unit and two first rebound units; one end of the first rebound unit is connected to the support unit, and the other end extends in a direction away from the support unit; the ends of the two first rebound units away from the support unit are respectively abutted against one side of the two friction plates close to the support unit; at least part of the first rebound units is arranged in the space between the two base units; the end of the support unit away from the first rebound unit is abutted against one side of the base unit along the second direction; the abutment point between one first rebound unit and the base unit is a first abutment point; the abutment point between the other first rebound unit and the base unit is a second abutment point; the support unit is connected to the pressure rod; the second direction is the width direction of the base unit; The strip spring brake includes a braking state; the braking state includes the first rebound unit applying a force to the base unit abutting therewith to move it away from the other base unit, the driving unit driving the two friction plates to move toward each other, and the first abutting point and the second abutting point moving in the same direction to S1 < S2; wherein S1 is the distance between the first abutting point and the central axis of the driving unit, and S2 is the distance between the second abutting point and the central axis of the driving unit; the central axis of the driving unit is parallel to the first direction; The rebound assembly further includes a second rebound unit; the first rebound unit, the support unit, and the second rebound unit are sequentially connected along a third direction; the second rebound unit abuts against a side of the base unit close to the friction plate at one end away from the support unit; at least a portion of the second rebound unit is arranged in a space between the two base units; the second rebound unit applies a force to the base unit abutting against it to move away from the other base unit; the abutment point between the second rebound unit and the base unit is a third abutment point; the third abutment point and the first abutment point are located on the same base unit; the third direction is the length direction of the base unit; The braking state further includes the second rebound unit applying a force to the base unit abutting against the second rebound unit to move the base unit away from the other base unit; The braking state further includes the first abutment point, the second abutment point, and the third abutment point moving in the same direction to S1 < S3; wherein S3 is the distance between the third abutment point and the central axis of the drive unit; The rebound assembly includes two second rebound units; one end of one second rebound unit is connected to the end of the support unit away from the first rebound unit, and the other end abuts against one base unit; one end of the other second rebound unit is connected to the end of the support unit away from the first rebound unit, and the other end abuts against the other base unit; the abutment between one second rebound unit and one base unit is the third abutment; the abutment between the other second rebound unit and the other base unit is the fourth abutment; the fourth abutment and the first abutment are located on the same base unit; The braking state also includes the first abutment, the second abutment, the third abutment, and the fourth abutment moving in the same direction to S3>MAX(S1, S4), S4<MIN(S2, S3); wherein S4 is the distance between the fourth abutment and the central axis of the drive unit.

2. The band spring brake according to claim 1, characterized in that: The distance between the end of the first rebound unit close to the support unit and the set reference line is smaller than the distance between the end of the first rebound unit away from the support unit and the set reference line; wherein, the set reference line is parallel to the first direction and vertically arranged on the left side of the first rebound unit.

3. The band spring brake according to claim 1, characterized in that: The support unit includes a first support module, a rebound module, and a second support module; the first support module, the rebound module, and the second support module are connected in sequence; one end of the two first rebound units away from the base unit is respectively connected to the second support module; the second support module is movably connected to the pressure rod; the first support module abuts against one side of the base unit along the third direction; The first supporting module applies a force on the base unit in a direction away from the first supporting module; the rebound module is spaced apart from the friction plate.

4. The band spring brake according to claim 3, characterized in that: The first support module includes a support body and a support foot; the support body is connected to one end of the rebound module away from the second support module; one end of the support foot is connected to the support body, and the other end abuts against one side of the base unit along the third direction; the support foot applies a force to the base unit in a direction away from the first support module.

5. The band spring brake according to claim 3, characterized in that: The rebound module includes a first spring clip, a second spring clip, a third spring clip, and a fourth spring clip; the first support module, the first spring clip, the second spring clip, the third spring clip, the fourth spring clip, and the second support module are connected in sequence; the first spring clip extends away from one end of the first support module and the third spring clip extends away from one end of the first support module respectively in a direction away from the brake assembly; the second spring clip extends away from one end of the first support module and the fourth spring clip extends away from one end of the first support module respectively in a direction close to the brake assembly.

6. The band spring brake according to claim 3, characterized in that: The second support module includes a clamping groove, a first extension piece, and a second extension piece; the clamping groove is connected to the end of the rebound module away from the first support module; the clamping groove is recessed toward the direction close to the brake assembly to form a recessed side; the recessed side is movably connected to the pressure rod; one end of the first extension piece is connected to the end of the clamping groove away from the first support module, and the other end extends toward the end close to the first support module; the pressure rod is arranged in the space surrounded by the clamping groove and the first extension piece; one end of the second extension piece is connected to the end of the clamping groove away from the first support module, and the other end extends toward the end away from the first support module; the second extension piece is connected to the first rebound unit.

7. The band spring brake according to claim 1, characterized in that: The first rebound unit includes a first arc spring piece, a fifth spring piece, and a first abutting portion; the first arc spring piece is connected to the support unit; the first arc spring piece protrudes in the direction away from the brake assembly to form an arc-shaped thin plate; one end of the fifth spring piece is connected to the first arc spring piece close to the brake assembly, and the other end extends toward the brake assembly; one end of the first abutting portion is connected to the fifth spring piece, and the other end abuts against the base unit; the first arc spring piece and the fifth spring piece drive the first abutting portion to apply a force to the base unit; one abutting point between the first abutting portion and the base unit is the first abutting point; another abutting point between the first abutting portion and the base unit is the second abutting point.

8. A braking system, characterized in that: The braking system comprises a band spring brake according to any one of claims 1 to 7, and further comprises: a brake disc, the brake disc being arranged in the space between the two friction plates; The braking state also includes the driving unit driving the two friction plates to move closer to each other until the two friction plates respectively abut against both sides of the brake disc in the thickness direction.

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