Band-shaped spring brake and braking system thereof

Abstract

The invention relates to the technical field of vehicles, in particular to a strip spring brake and a braking system thereof. The band-shaped spring brake comprises a support assembly, a pressing rod, two brake assemblies and a springback assembly. The pressing rod is connected with the support assembly. The brake assembly comprises a driving unit, a base unit and a friction plate, the driving unit is in driving connection with the base unit, and the friction plate is connected with the base unit. The pressing rod is slidably connected with the base unit. The springback assembly comprises a supporting unit and two first springback units, one end of each first springback unit is connected with the supporting unit, and the other end of each first springback unit abuts against the friction plate. The supporting unit is connected with the pressing rod and abuts against the base unit in the second direction. In the braking state, the first abutting position and the second abutting position move in the same direction till the distance between the first abutting position and the central axis of the driving unit is smaller than the distance between the second abutting position and the central axis of the driving unit, and therefore the problem of how to make the elastic force of the strip-shaped spring brake elastic piece sufficient under the condition that the cost is limited is solved.

Description

Technical Field

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

[0002] Currently, the disc brake of a vehicle mainly consists of a brake disc and a brake caliper, where the brake disc is connected to the vehicle wheel. During vehicle braking, the brake piston in the brake caliper drives the friction plate to move until the friction plate abuts against the brake disc, and the rotational speed of the brake disc is reduced through the frictional force generated between the two, thereby achieving vehicle deceleration or stopping. When braking needs to be cancelled, the elastic piece in the brake caliper plays a role, driving the friction plate to move so that the friction plate and the brake disc return to the spaced state, so that the vehicle can resume normal driving.

[0003] However, in order to improve the response speed of the friction plate when braking is cancelled, the method of increasing the elastic force of the elastic piece is usually adopted. However, this method has problems in practical applications. Since the increase in the elastic force of the elastic piece requires optimization in aspects such as material selection and structural design, this will undoubtedly increase the complexity of the production process, and thus lead to a significant increase in production costs. The key point of the problem is that under the requirement of ensuring the braking cancellation response speed of the friction plate, the existing technical means of increasing the elastic force of the elastic piece are difficult to achieve a balance between performance improvement and cost control. Summary of the Invention

[0004] In order to solve the problem of how to make the elastic force of the elastic piece of the strip spring brake sufficient under cost constraints, the present invention provides a strip spring brake and its braking system.

[0005] In a first aspect, the present invention provides a strip spring brake, which includes: A support assembly; A pressure rod, which is connected to the support assembly; Two braking assemblies, each braking assembly including a driving unit, a base unit, and a friction plate; the driving unit is drivingly connected to the base unit; the friction plate is connected to the base unit; the two braking assemblies are symmetrically spaced along a first direction; the pressure rod is slidably connected to the base unit; A resilient component, the resilient component includes a support unit and two first resilient units; one end of the first resilient unit is connected to the support unit, and the other end extends away from the support unit; the two first resilient units are respectively in contact with one side of the two friction plates close to the support unit at their ends away from the support unit; at least part of the first resilient units are arranged in the space between the two base units; one end of the support unit away from the first resilient unit is in contact with one side of the base unit along the second direction; the contact position of one first resilient unit with the base unit is the first contact position; the contact position of the other first resilient unit with the base unit is the second contact position; the support unit is connected to the pressure rod; the second direction is the width direction of the base unit; The belt spring brake includes a braking state; the braking state includes that the first resilient unit applies a force to the base unit in contact with it to move away from the other base unit, the driving unit drives the two friction plates to move closer to each other, and the first contact position and the second contact position move in the same direction to S1 < S2; where S1 is the distance between the first contact position and the central axis of the driving unit, and S2 is the distance between the second contact position and the central axis of the driving unit; the central axis of the driving unit is parallel to the first direction.

[0006] In some embodiments, the resilient component further includes a second resilient unit; the first resilient unit, the support unit, and the second resilient unit are sequentially connected along the third direction; one end of the second resilient unit away from the support unit is in contact with one side of the base unit close to the friction plate; at least part of the second resilient units are arranged in the space between the two base units; the second resilient unit applies a force to the base unit in contact with it to move away from the other base unit; the contact position of the second resilient unit with the base unit is the third contact position; the third contact position and the first contact position are on the same base unit; the third direction is the length direction of the base unit; The braking state further includes that the second resilient unit applies a force to the base unit in contact with it to move away from the other base unit.

[0007] In some embodiments, the braking state further includes that the first contact position, the second contact position, and the third contact position move in the same direction to S1 < S3; where S3 is the distance between the third contact position and the central axis of the driving unit.

[0008] In some embodiments, the resilient component includes two of the second resilient units; one end of one of the second resilient units is connected to the end of the support unit away from the first resilient unit, and the other end abuts against one of the base units; one end of the other second resilient unit is connected to the end of the support unit away from the first resilient unit, and the other end abuts against the other base unit; the abutting position of one of the second resilient units and one of the base units is the third abutting position; the abutting position of the other second resilient unit and the other base unit is the fourth abutting position; the fourth abutting position and the first abutting position are on the same base unit; The braking state further includes that the first abutting position, the second abutting position, the third abutting position, and the fourth abutting position move in the same direction to S3 > MAX(S1, S4), S4 < MIN(S2, S3); where S4 is the distance between the fourth abutting position and the central axis of the driving unit.

[0009] In some embodiments, the distance between the end of the first resilient unit close to the support unit and a set reference line is less than the distance between the end of the first resilient unit away from the support unit and the set reference line; where the set reference line is parallel to the first direction and perpendicular to the central axis of the driving unit.

[0010] In some embodiments, the support unit includes a first support module, a resilient module, and a second support module; the first support module, the resilient module, and the second support module are connected in sequence; the ends of the two first resilient units away from the base unit are 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 in the third direction; the first support module applies a force to the base unit in a direction away from the first support module; the resilient module is spaced apart from the friction plate.

[0011] In some embodiments, the first support module includes a support body and support feet; the support body is connected to the end of the resilient module away from the second support module; one end of the support feet is connected to the support body, and the other end abuts against one side of the base unit in the third direction; the support feet apply a force to the base unit in a direction away from the first support module.

[0012] In some embodiments, the rebound module includes a first elastic sheet, a second elastic sheet, a third elastic sheet, and a fourth elastic sheet; the first support module, the first elastic sheet, the second elastic sheet, the third elastic sheet, the fourth elastic sheet, and the second support module are connected in sequence; one end of the first elastic sheet away from the first support module and one end of the third elastic sheet away from the first support module extend away from the braking assembly; one end of the second elastic sheet away from the first support module and one end of the fourth elastic sheet away from the first support module extend toward the braking assembly.

[0013] In some embodiments, the second support module includes a pressing groove, a first extension piece, and a second extension piece; the pressing groove is connected to the end of the rebound module away from the first support module; the pressing groove is recessed toward the braking assembly to form a recessed side; the recessed side is movably connected to the pressing rod; one end of the first extension piece is connected to the end of the pressing groove away from the first support module, and the other end extends toward the first support module; the pressing rod is disposed in the space surrounded by the pressing groove and the first extension piece; one end of the second extension piece is connected to the end of the pressing groove away from the first support module, and the other end extends away from the first support module; the second extension piece is connected to the first rebound unit.

[0014] In some embodiments, the first rebound unit includes a first arc-shaped elastic sheet, a fifth elastic sheet, and a first abutting portion; the first arc-shaped elastic sheet is connected to the support unit; the first arc-shaped elastic sheet protrudes away from the braking assembly to form an arc-shaped thin plate; one end of the fifth elastic sheet is connected to the first arc-shaped elastic sheet in the direction of the braking assembly, and the other end extends toward the braking assembly; one end of the first abutting portion is connected to the fifth elastic sheet, and the other end abuts against the base unit; the first arc-shaped elastic sheet and the fifth elastic sheet drive the first abutting portion to apply a force to the base unit; the abutting position of one first abutting portion and the base unit is the first abutting position; the abutting position of the other first abutting portion and the base unit is the second abutting position.

[0015] In a second aspect, the present invention provides a braking system, the braking system includes the band spring brake of any one in the first aspect, and the braking system further includes: a brake disc, the brake disc is disposed in the space between the two friction plates; The braking state further includes that the driving unit drives the two friction plates to move closer to each other until the two friction plates respectively abut against both sides in the thickness direction of the brake disc.

[0016] To solve the problem of how to make the elastic force of the elastic sheet of the band spring brake sufficient under the condition of limited cost, the present invention has the following advantages: By respectively abutting two first resilient units against one side of two friction plates close to the support unit, when braking of the vehicle is cancelled after braking, the first resilient units can drive the two friction plates to move away from each other, so that the friction plates are spaced from the brake disc, ensuring that the vehicle can travel. By virtue of the end of the support unit far from the first resilient unit abutting against one side of the base unit along the second direction, and the support unit being connected to the pressure rod, the relative positions of the fixed resilient assembly and the base unit are fixed, providing support for the first resilient unit to drive the friction plates. In the braking state, since the distance between the first abutting position and the central axis of the driving unit is smaller than the distance between the second abutting position and the central axis of the driving unit, the resistance arm of the first abutting position and the driving unit is smaller. Therefore, the first resilient unit adjacent to the first abutting position can more easily drive the friction plate on this side to move away from the other friction plate, enabling it to move to be spaced from the brake disc more quickly, improving the response speed of the vehicle to cancel braking; at the same time, the length of the first resilient unit adjacent to the second abutting position extending from the support unit is less, thereby achieving the effect of reducing costs. Description of the Drawings

[0017] Figure 1 Schematic diagram of a braking assembly, a resilient assembly, and a pressure rod showing an embodiment; Figure 2 Top view of a braking assembly, a resilient assembly, and a pressure rod showing an embodiment; Figure 3 Side view of a braking assembly, a resilient assembly, and a pressure rod showing an embodiment; Figure 4 Schematic diagram of a band spring brake showing an embodiment; Figure 5 Front view of a resilient assembly showing an embodiment; Figure 6 Schematic diagram of a resilient assembly showing an embodiment; Figure 7 Side view of a resilient assembly showing an embodiment; Figure 8 Schematic diagram of a braking system showing an embodiment.

[0018] Reference numerals: 01 braking assembly; 11 driving unit; 12 base unit; 121 base plate; 122 guide hole; 13 friction plate; 02 rebounding assembly; 21 supporting unit; 211 first supporting module; 2111 supporting body; 2112 supporting foot; 212 rebounding module; 2121 first elastic sheet; 2122 second elastic sheet; 2123 third elastic sheet; 2124 fourth elastic sheet; 213 second supporting module; 2131 pressing groove; 2132 first extension piece; 2133 second extension piece; 22 first rebounding unit; 221 first arc-shaped elastic sheet; 222 fifth elastic sheet; 223 first abutting portion; 23 second rebounding unit; 231 second arc-shaped elastic sheet; 232 sixth elastic sheet; 233 second abutting portion; 03 pressure bar; 04 support assembly; 05 brake disc. Detailed implementation manners

[0019] The present disclosure will now be described with reference to several exemplary embodiments. It should be understood that these embodiments are described only to enable those of ordinary skill in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0020] As used herein, the term "comprising" and its variants are to be construed as open-ended terms meaning "including but not limited to". The term "based on" is to be construed as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be construed as "at least one embodiment". The term "another embodiment" is to be construed as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation. Also, in addition to being used to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific circumstances. In addition, the terms "mounted", "arranged", "provided with", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral structure; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, or there may be internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to 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 and quantity of the indicated device, element or component. Unless otherwise specified, the meaning of "a plurality of" is two or more.

[0021] In this embodiment, in the design of the vehicle band spring brake, the connection structure of the support assembly 04 and the pressure rod 03 and the arrangement of the brake assembly 01 have an important influence on the braking performance. The existing band spring brake generally includes a support assembly 04, a pressure rod 03 and two brake assemblies 01 arranged at intervals, each brake assembly 01 includes a drive unit 11, a base unit 12 and a friction plate 13, wherein 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 is slidably connected to the base unit 12 to achieve dynamic adjustment during the braking process. However, when the brake is canceled, the response speed of the friction plate 13 becomes a key factor restricting the performance of the band spring brake. In order to improve the response speed, the prior art often achieves this by increasing the elastic force of the spring sheet, but this method not only increases the manufacturing cost, but also may have an adverse effect on the overall structure and reliability of the band spring brake. Therefore, how to optimize the design of the rebound assembly 02 to improve the response speed of the friction plate 13 when the brake is canceled without increasing the cost has become a technical problem to be solved in the field of band spring brake design.

[0022] like Figure 1 , Figure 4 As shown, the band 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 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 connected to the base unit 12 by driving, 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 a 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 in a direction close to 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.

[0023] 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 be in contact with 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 the up and 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. One end of each of the two first rebound units 22 away from the support unit 21 is in contact with one side of the two support units 21 close to the friction plate 13, 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, and the friction plate 13 and the brake disc 05 between the two friction plates 13 are arranged at intervals, so that the vehicle runs stably; at least part of the first rebound unit 22 can be arranged in the space between the two base units 12, and the space between the two base units 12 can be fully utilized to realize the compactness of the band spring brake; the contact point of one first rebound unit 22 and the base unit 12 can be the first contact point; the contact point of the other first rebound unit 22 and the base unit 12 can be the second contact point; when the braking of the vehicle is cancelled after braking, the first rebound unit 22 can drive the two friction plates 13 to move away from each other, and the friction plate 13 and the brake disc 05 are arranged at intervals, so that the vehicle can run normally; the end of the support unit 21 away from the first rebound unit 22 can be in contact with one side (which can be the upper side as Figure 2 shown) of the base unit 12 along the second direction, 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.

[0024] The band spring brake may include a braking state; the braking state may include that the first rebound unit 22 exerts a force on the base unit 12 in contact with it to move away from the other base unit 12, the driving unit 11 can drive the two friction plates 13 to move closer to each other, and the first contact point and the second contact point can simultaneously move towards as Figure 2move downward as shown to S1 < S2; where S1 is the distance between the first abutting position and the central axis of the driving unit 11, and S2 is the distance between the second abutting position and the central axis of the driving unit 11; the central axis of the driving unit 11 is parallel to the first direction. When the strip spring brake cancels braking, the driving unit 11 no longer drives the two friction plates 13, and the first return unit 22 can drive the two friction plates 13 to move away from each other through the base unit 12. In the braking state, the first return unit 22 applies a force to the base unit 12 in contact with 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 are in contact with the brake disc 05 to achieve the braking effect; the first abutting position and the second abutting position move in the same direction to S1 < S2. Since the distance between the first abutting position and the central axis of the driving unit 11 is less than the distance between the second abutting position and the central axis of the driving unit 11, the resistance arm of the first abutting position and the driving unit 11 is smaller, and the first return unit 22 adjacent to the first abutting position can more easily drive the friction plate 13 adjacent to the first abutting position to move away from the other friction plate 13, so that the friction plate 13 adjacent to the first abutting position can move to be spaced from the brake disc 05 more quickly, thereby improving the response speed of the vehicle to cancel braking; at the same time, as Figure 2 shown, the length of the first return unit 22 adjacent to the first abutting position extending from the support unit 21 can be greater than the length of the first return unit 22 adjacent to the second abutting position extending from the support unit 21, so as to realize that the first abutting position and the second abutting position move in the same direction to S1 < S2, and the manufacturing material of the first return unit 22 adjacent to the second abutting position can be less, achieving the effect of reducing costs.

[0025] In some other embodiments, the base unit 12 may include a base plate 121 and a guide hole 122; the guide hole 122 may penetrate both sides of the base plate 121 along the first direction. As Figure 2 shown, the driving unit 11 may be drivingly connected to the base unit 12; the driving unit 11, the base plate 121, and the friction plate 13 may be connected in sequence. The pressure rod 03 and the guide hole 122 may be slidably connected to the pressure rod 03, so that the base plate 121 can move along the first direction. The position where one first return unit 22 abuts against one base plate 121 may be the first abutting position, and the position where the other first return unit 22 abuts against the other base plate 121 may be the second abutting position. One end of the support unit 21 away from the first return unit 22 may abut against the top end of the base plate 121 as Figure 1 shown, for supporting the first return unit 22.

[0026] In this embodiment, as Figure 3 、 Figure 4 、 Figure 6As shown, the rebounding assembly 02 may further include a second rebounding unit 23; the first rebounding unit 22, the supporting unit 21, and the second rebounding unit 23 may be connected in sequence along a third direction, and the third direction may be the length direction of the base unit 12, that is, the left - right direction as shown in Figure 3 ; one end of the second rebounding unit 23 away from the supporting unit 21 may extend to abut against one side of the base unit 12 close to the friction plate 13; at least part of the second rebounding 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 realize the compactness of the band - type spring brake; the second rebounding unit 23 applies a force to the base unit 12 in contact with it to move away from the other base unit 12; the contact position between the second rebounding unit 23 and the base unit 12 is the third abutting position; the third abutting position and the first abutting position are on the same base unit 12. When braking is cancelled, the second rebounding unit 23 and the first rebounding unit 22 adjacent to the first abutting position can simultaneously drive the friction plate 13 on one side of the first abutting position to move away from the other friction plate 13 through the base unit 12, further improving the moving speed and response speed of the friction plate 13 on one side of the first abutting position, thereby optimizing the vehicle's controllability.

[0027] The braking state may further include that the second rebounding unit 23 applies a force to the base unit 12 in contact with it to move away from the other base unit 12.

[0028] In this embodiment, as shown in Figure 6 and Figure 7 , the braking state may further include that the first abutting position, the second abutting position, and the third abutting position simultaneously move downward as shown in Figure 2 until the distance S1 between the first abutting position and the central axis of the driving unit 11 is less than the distance S3 between the third abutting position and the central axis of the driving unit 11. Since the resistance arm of the first abutting position and the driving unit 11 is small, the first rebounding unit 22 adjacent to the first abutting position can easily drive the friction plate 13 adjacent to the first abutting position to move away from the other friction plate 13. Coupled with the fact that the second rebounding unit 23 simultaneously drives the same friction plate 13 in the same direction, the moving speed of the friction plate 13 adjacent to the first abutting position moving to a distance from the brake disc 05 can be further increased, thereby improving the response speed of the vehicle to cancel braking. As shown in Figure 7 , the length of the first rebounding unit 22 extending from the supporting unit 21 adjacent to the first abutting position may be greater than the length of the second rebounding unit 23 extending from the supporting unit 21, so as to realize S1 < S3 in the braking state. Less material is used when manufacturing the second rebounding unit 23, which can reduce costs. As shown in Figure 3 , the central axis of the driving unit 11 may be arranged between the first rebounding unit 22 and the second rebounding unit 23 to make the forces on the first rebounding unit 22 and the second rebounding unit 23 uniform.

[0029] In some other embodiments, such as Figure 3 shown, the braking assembly 01 may include two driving units 11. The central axes of the two driving units 11 are uniformly arranged between the first resilient unit 22 and the second resilient unit 23, so that the first resilient unit 22 and the second resilient unit 23 are uniformly stressed.

[0030] In this embodiment, such as Figure 6 , Figure 7 shown, the resilient assembly 02 may include two second resilient units 23; one end of a second resilient unit 23 may be connected to the end of the support unit 21 away from the first resilient unit 22, and the other end may abut against one side of a base unit 12 close to the friction plate 13; one end of the other second resilient unit 23 may be connected to the end of the support unit 21 away from the first resilient unit 22, and the other end may abut against one side of the other base unit 12 close to the friction plate 13; the abutting position of one second resilient unit 23 and one base unit 12 may be the third abutting position; the abutting position of the other second resilient unit 23 and the other base unit 12 may be the fourth abutting position; the fourth abutting position and the first abutting position may be located on the same base unit 12. When canceling the braking, the second resilient unit 23 adjacent to the fourth abutting position and the first resilient unit 22 adjacent to the first abutting position simultaneously drive the friction plate 13 abutting against the second resilient unit 23 adjacent to the fourth abutting position to move away from the other friction plate 13, which can increase the moving speed of the friction plate 13 abutting against the second resilient unit 23 adjacent to the fourth abutting position, so that the vehicle can quickly increase to the target vehicle speed.

[0031] The braking state may further include that the first abutting position, the second abutting position, the third abutting position, and the fourth abutting position simultaneously move downward as shown in Figure 2 shown to S3 > MAX(S1, S4), S4 < MIN(S2, S3); where S4 is the distance between the fourth abutting position and the central axis of the driving unit 11. The first resilient unit 22 adjacent to the first abutting position and the second resilient unit 23 adjacent to the third abutting position simultaneously drive one friction plate 13, and the first resilient unit 22 adjacent to the second abutting position and the second resilient unit 23 adjacent to the fourth abutting position simultaneously drive the other friction plate 13. When the two friction plates 13 move away from each other, the moving speed is fast, so that the response speed of canceling the braking of the vehicle is fast, and the vehicle can quickly increase to the target vehicle speed after canceling the braking. As shown in Figure 7As shown, the length by which the second resilient unit 23 adjacent to the third abutting portion extends from the support unit 21 can be respectively less than the length by which the first resilient unit 22 adjacent to the first abutting portion extends from the support unit 21, and the length by which the second resilient unit 23 adjacent to the fourth abutting portion extends from the support unit 21, so as to achieve S3 > MAX(S1, S4) in the braking state. The length by which the second resilient unit 23 adjacent to the fourth abutting portion extends from the support unit 21 can be respectively greater than the length by which the first resilient unit 22 adjacent to the second abutting portion extends from the support unit 21, and the length by which the second resilient unit 23 adjacent to the third abutting portion extends from the support unit 21, so as to achieve S4 < MIN(S2, S3) in the braking state. When manufacturing the first resilient unit 22 adjacent to the second abutting portion and the second resilient unit 23 adjacent to the third abutting portion, less consumables are used, which can reduce costs.

[0032] In some other embodiments, the second resilient unit 23 may include a second arc-shaped elastic piece 231, a sixth elastic piece 232, and a second abutting portion 233; the second arc-shaped elastic piece 231 may be connected to the support unit 21; the second arc-shaped elastic piece 231 may protrude away from the braking assembly 01 to form an arc-shaped thin plate, that is, protrude to form an arc-shaped thin plate in the direction from bottom to top as shown in Figure 2 ; one end of the sixth elastic piece 232 may be connected to the second arc-shaped elastic piece 231 in the direction close to the braking assembly 01, and the other end may extend in the direction close to the braking assembly 01, that is, extend in the downward direction as shown in Figure 2 ; one end of the second abutting portion 233 may be connected to the sixth elastic piece 232, and the other end abuts against the base unit 12; the second arc-shaped elastic piece 231 and the sixth elastic piece 232 may drive the second abutting portion 233 to apply a force to the base unit 12, so that the second abutting portion 233 continuously abuts against the base unit 12. When the braking is cancelled, the shape of the second arc-shaped elastic piece 231 can provide an elastic force to drive the two base units 12 to move away from each other through the sixth elastic piece 232 by the second abutting portion 233. Since the second abutting portion 233 abuts against the base unit 12 for a long time and wears, the second abutting portion 233 can be made of a material with better wear resistance, which can extend the maintenance cycle of the strip spring brake. The abutting position of one second abutting portion 233 and the base unit 12 may be the third abutting portion; the abutting position of the other second abutting portion 233 and the base unit 12 may be the fourth abutting portion.

[0033] In this embodiment, as shown in Figure 3 , the distance between the end of the first resilient unit 22 close to the support unit 21 and the set reference line may be less than the distance between the end of the first resilient unit 22 far from the support unit 21 and the set reference line; wherein, the set reference line may be parallel to the first direction and perpendicular to the central axis of the driving unit 11. As shown in Figure 3As shown, the set reference line can be vertically arranged on the left side of the first resilient unit 22, such that the top end of the first resilient unit 22 is closer to the set reference line than the bottom end of the first resilient unit 22.

[0034] When the two friction plates 13 approach each other, the two first resilient units 22 will deform and elongate. Under the action of the support unit 21, this deformation will cause the first resilient unit 22 to move downward away from the lower end of the support unit 21. At the same time, due to the interaction of forces, the first resilient unit 22 will also have a tendency to move upward. This setting method enables the first resilient unit 22 to have upward and leftward component forces as shown in Figure 5 when the first resilient unit 22 is squeezed by the base unit 12, so that the first resilient unit 22 is more likely to move upward. The upward displacement and the downward displacement can partially cancel each other out. Thus, when the two friction plates 13 approach each other, the moving area of the two first resilient units 22 on the base unit 12 is small, reducing the wear on the base unit 12.

[0035] In this embodiment, as shown in Figure 5 and Figure 6 , the support unit 21 can include a first support module 211, a resilient module 212, and a second support module 213; the first support module 211, the resilient module 212, and the second support module 213 can be connected in sequence; the ends of the two first resilient units 22 away from the base unit 12 can be respectively connected to the second support module 213; the second support module 213 can be movably connected to the pressure rod 03. When the two friction plates 13 move towards each other, the first resilient unit 22 elongates under the action of the force from the base unit 12, and the end of the first resilient unit 22 away from the support unit 21 will move downward. At this time, the movable connection between the second support module 213 and the pressure rod 03 allows the second support module 213 close to the first resilient unit 22 to rotate counterclockwise around the pressure rod 03 as shown in Figure 5 so that the first resilient unit 22 can move upward. The upward displacement and the downward displacement can partially cancel each other out. Thus, when the two friction plates 13 approach each other, the moving area of the two first resilient units 22 on the base unit 12 is small, reducing the wear on the base unit 12; the first support module 211 can be in contact with 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, the left - right direction as shown in Figure 3 . The first support module 211 can exert a force on the base unit 12 in a direction away from the first support module 211, as shown in Figure 2As shown, the first support module 211 can be in contact with the top end of the base unit 12 to provide support; the resilient module 212 can be spaced apart from the friction plates 13. When the two friction plates 13 move towards each other, the space between the resilient module 212 and the friction plates 13 can allow sufficient space for the resilient module 212 to deform, so that the first resilient unit 22 can move upward more easily.

[0036] In this embodiment, as Figure 6 shown, the first support module 211 can include a support body 2111 and support feet 2112; the support body 2111 can be connected to one end of the resilient module 212 away from the second support module 213; one end of the support feet 2112 can be connected to the support body 2111, and the other end can extend to abut against one side of the base unit 12 in the third direction. As Figure 1 shown, one end of the support feet 2112 away from the support body 2111 can extend to abut against the top end of the base unit 12 to provide support for the resilient module 212. The support feet 2112 can exert a force on the base unit 12 in a direction away from the first support module 211. When the two friction plates 13 move towards each other, the first resilient unit 22 will deform and elongate under the force from the base unit 12. The support feet 2112 can be compressed to move the support body 2111 towards the base unit 12, and at the same time, the resilient module 212 can also deform. The support feet 2112 and the resilient module 212 allow the first resilient unit 22 to move upward, thereby offsetting the amount of downward movement of the first resilient unit 22 under the action of the force, so that the moving range of the first resilient unit 22 on the base unit 12 is small, reducing the wear of the base unit 12.

[0037] In this embodiment, as Figure 5 、 Figure 6 、 Figure 7 shown, the resilient module 212 can include a first elastic sheet 2121, a second elastic sheet 2122, a third elastic sheet 2123, and a fourth elastic sheet 2124; the first support module 211, the first elastic sheet 2121, the second elastic sheet 2122, the third elastic sheet 2123, the fourth elastic sheet 2124, and the second support module 213 can be connected in sequence; one end of the first elastic sheet 2121 away from the first support module 211 and one end of the third elastic sheet 2123 away from the first support module 211 can extend away from the braking assembly 01 respectively; one end of the second elastic sheet 2122 away from the first support module 211 and one end of the fourth elastic sheet 2124 away from the first support module 211 can extend towards the braking assembly 01 respectively. After the first resilient unit 22 is squeezed by the base unit 12, the top end of the first resilient unit 22 as Figure 5 shown can move upward. When the first resilient unit 22 moves, the first elastic sheet 2121, the second elastic sheet 2122, the third elastic sheet 2123, and the fourth elastic sheet 2124 are prone to deformation, allowing the first resilient unit 22 asFigure 5 The top end shown can move upward more easily, thereby offsetting the amount by which the first resilient unit 22 moves downward under the action of a force, so that the first resilient unit 22 has a small movement range on the base unit 12, reducing the wear of the base unit 12.

[0038] In this embodiment, as Figure 5 , Figure 6 , Figure 7 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 one end of the resilient module 212 away from the first support module 211; the pressing groove 2131 may be recessed toward the direction close to the braking assembly 01 to form a recessed side, that is, as Figure 5 shown, it is recessed in the direction from top to bottom to form a recessed side; the recessed side may be movably connected to the pressure lever 03; one end of the first extension piece 2132 may be connected to one end of the pressing groove 2131 away from the first support module 211, and the other end may extend toward one end close to the first support module 211; the pressure lever 03 may be disposed in the space surrounded by the pressing groove 2131 and the first extension piece 2132, and when the second support module 213 rotates around the pressure lever 03, it can prevent the pressure lever 03 from disengaging from the second support module 213; one end of the second extension piece 2133 may be connected to one end of the pressing groove 2131 away from the first support module 211, and the other end may extend in a direction away from the first support module 211; the end of the second extension piece 2133 away from the first support module 211 may be connected to the first resilient unit 22. When the two friction plates 13 move closer to each other until the first resilient unit 22 is deformed, the second support module 213 may rotate around the pressure lever 03, and the pressure lever 03 disposed in the space surrounded by the pressing groove 2131 and the first extension piece 2132 can prevent the pressure lever 03 from disengaging from the second support module 213, so as to ensure that the first resilient unit 22 can quickly drive the two friction plates 13 to move away from each other after the braking is cancelled.

[0039] In this embodiment, as Figure 5 , Figure 6 , Figure 7 shown, the first resilient unit 22 may include a first arc-shaped elastic piece 221, a fifth elastic piece 222, and a first abutting portion 223; the first arc-shaped elastic piece 221 may be connected to the support unit 21; the first arc-shaped elastic piece 221 may protrude toward the direction away from the braking assembly 01 to form an arc-shaped thin plate, that is, as Figure 2 shown, it protrudes in the direction from bottom to top to form an arc-shaped thin plate; one end of the fifth elastic piece 222 may be connected to the first arc-shaped elastic piece 221 in the direction close to the braking assembly 01, and the other end may extend in the direction close to the braking assembly 01, that is, as Figure 2extends in the downward direction shown; one end of the first abutting portion 223 can be connected to the fifth elastic piece 222, and the other end abuts against the base unit 12; the first arc-shaped elastic piece 221 and the fifth elastic piece 222 can drive the first abutting portion 223 to apply a force to the base unit 12 so that the first abutting portion 223 continuously abuts against the base unit 12. When the braking is cancelled, the shape of the first arc-shaped elastic piece 221 can provide an elastic force to drive the first abutting portion 223 to drive the two base units 12 to move away from each other through the fifth elastic piece 222. If the first abutting portion 223 abuts against the base unit 12 for a long time and wears, the first abutting portion 223 can be made of a material with better wear resistance, which can extend the maintenance cycle of the strip spring brake. The abutting position of one first abutting portion 223 and the base unit 12 can be the first abutting position; the abutting position of the other first abutting portion 223 and the base unit 12 can be the second abutting position.

[0040] In this embodiment, a braking system is provided. The braking system is applied to the strip spring brake in any one of the above embodiments, such as Figure 8 shown, the braking system may further include: a brake disc 05. The brake disc 05 can be arranged in the space separated by the two friction plates 13. The brake disc 05 can be connected to the vehicle wheel and rotate at the same speed as the wheel. When the vehicle is driving normally, the brake disc 05 and the two friction plates 13 are respectively arranged at intervals, and the brake disc 05 rotates synchronously with the wheel to avoid interference between the brake disc 05 and the friction plates 13.

[0041] The braking state may further include that the driving unit 11 drives the two friction plates 13 to move closer to each other until the two friction plates 13 respectively abut against both sides in the thickness direction of the brake disc 05, so that the two friction plates 13 clamp the brake disc 05, thereby generating a frictional torque that prevents the brake disc 05 from rotating, and further preventing the wheel from rotating to achieve braking.

[0042] Those of ordinary skill in the art can understand that the above embodiments are specific cases for implementing the present disclosure, and in practical applications, various changes can be made to its form and details without departing from the scope of the present disclosure.

Claims

1. A belt spring brake, characterized in that, The belt spring brake includes: A support assembly; A pressure rod, which is connected to the support assembly; Two braking assemblies, each braking assembly including a driving unit, a base unit, and a friction plate; the driving unit is drivingly connected to the base unit; the friction plate is connected to the base unit; the two braking assemblies are symmetrically spaced along a first direction; the pressure rod is slidably connected to the base unit; A return spring assembly, the return spring assembly including a support unit and two first return spring units; one end of each first return spring unit is connected to the support unit, and the other end extends away from the support unit; the ends of the two first return spring units away from the support unit respectively abut against one side of the two friction plates close to the support unit; at least part of each first return spring unit is disposed within the spaced space between the two base units; the end of the support unit away from the first return spring unit abuts against one side of the base unit along a second direction; the abutting position of one first return spring unit and the base unit is a first abutting position; the abutting position of the other first return spring unit and the base unit is a second abutting position; the support unit is connected to the pressure rod; the second direction is the width direction of the base unit; The belt spring brake includes a braking state; the braking state includes that the first return spring unit applies a force to the base unit with which it abuts to move away from the other base unit, the driving unit drives the two friction plates to move closer to each other, and the first abutting position and the second abutting position move in the same direction to S1 < S2; where S1 is the distance between the first abutting position and the central axis of the driving unit, and S2 is the distance between the second abutting position and the central axis of the driving unit; the central axis of the driving unit is parallel to the first direction.

2. The belt spring brake according to claim 1, characterized in that, The return spring assembly further includes a second return spring unit; the first return spring unit, the support unit, and the second return spring unit are sequentially connected along a third direction; the end of the second return spring unit away from the support unit abuts against one side of the base unit close to the friction plate; at least part of the second return spring unit is disposed within the spaced space between the two base units; the second return spring unit applies a force to the base unit with which it abuts to move away from the other base unit; the abutting position of the second return spring unit and the base unit is a third abutting position; the third abutting position and the first abutting position are located on the same base unit; the third direction is the length direction of the base unit; The braking state further includes that the second return spring unit applies a force to the base unit with which it abuts to move away from the other base unit.

3. The belt spring brake according to claim 2, characterized in that, The braking state further includes that the first abutting position, the second abutting position, and the third abutting position move in the same direction to S1 < S3; where S3 is the distance between the third abutting position and the central axis of the driving unit.

4. The belt spring brake according to claim 3, characterized in that, The rebound assembly includes two of the second rebound units; one end of one of the second rebound units is connected to the end of the support unit away from the first rebound unit, and the other end is in contact with one of the base units; 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 is in contact with the other base unit; the contact position between one of the second rebound units and one of the base units is the third contact position; the contact position between the other second rebound unit and the other base unit is the fourth contact position; the fourth contact position and the first contact position are on the same base unit; The braking state further includes that the first contact position, the second contact position, the third contact position, and the fourth contact position move in the same direction to S3 > MAX(S1, S4), S4 < MIN(S2, S3); where S4 is the distance between the fourth contact position and the central axis of the driving unit.

5. The belt 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 less than the distance between the end of the first rebound unit away from the support unit and the set reference line; where the set reference line is parallel to the first direction and perpendicular to the central axis of the driving unit.

6. The belt 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; the ends of the two first rebound units away from the base unit are respectively connected to the second support module; the second support module is movably connected to the pressure rod; the first support module is in contact with one side of the base unit along the third direction; The first support module exerts a force on the base unit in a direction away from the first support module; the rebound module and the friction plate are arranged at intervals.

7. The belt spring brake according to claim 6, characterized in that, The first support module includes a support body and support feet; the support body is connected to the end of the rebound module away from the second support module; one end of the support feet is connected to the support body, and the other end is in contact with one side of the base unit along the third direction; the support feet exert a force on the base unit in a direction away from the first support module.

8. The belt spring brake according to claim 6, characterized in that, The rebound module includes a first elastic sheet, a second elastic sheet, a third elastic sheet, and a fourth elastic sheet; the first support module, the first elastic sheet, the second elastic sheet, the third elastic sheet, the fourth elastic sheet, and the second support module are connected in sequence; the end of the first elastic sheet away from the first support module and the end of the third elastic sheet away from the first support module respectively extend in a direction away from the braking assembly; the end of the second elastic sheet away from the first support module and the end of the fourth elastic sheet away from the first support module respectively extend in a direction close to the braking assembly.

9. The belt spring brake according to claim 6, characterized in that, The second support module includes a pressing groove, a first extension piece, and a second extension piece; the pressing groove is connected to the end of the spring-back module away from the first support module; the pressing groove is recessed toward the braking assembly to form a recessed side; the recessed side is movably connected to the pressing rod; one end of the first extension piece is connected to the end of the pressing groove away from the first support module, and the other end extends toward the end close to the first support module; the pressing rod is disposed in the space surrounded by the pressing groove and the first extension piece; one end of the second extension piece is connected to the end of the pressing groove away from the first support module, and the other end extends away from the first support module; the second extension piece is connected to the first spring-back unit.

10. The belt spring brake according to claim 1, characterized in that, The first spring-back unit includes a first arc-shaped spring piece, a fifth spring piece, and a first abutting portion; the first arc-shaped spring piece is connected to the support unit; the first arc-shaped spring piece protrudes away from the braking assembly to form an arc-shaped thin plate; one end of the fifth spring piece is connected to the first arc-shaped spring piece in the direction close to the braking assembly, and the other end extends toward the braking 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-shaped spring piece and the fifth spring piece drive the first abutting portion to apply a force to the base unit; the abutting position of one first abutting portion and the base unit is the first abutting position; the abutting position of the other first abutting portion and the base unit is the second abutting position.

11. A braking system, characterized in that, The braking system includes a strip spring brake as described in any one of claims 1-10, and the braking system further includes: a brake disc, the brake disc is disposed in the space between the two friction plates; The braking state further includes that the driving unit drives the two friction plates to move closer to each other until the two friction plates respectively abut against both sides in the thickness direction of the brake disc.

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