Brake shoe and brake device

Abstract

The utility model relates to the technical field of vehicle braking, and provides a brake shoe and a brake device. The brake shoe comprises a brake part and an adjusting part, one end of the brake part is connected with the adjusting part, and the other end of the brake part is matched with the brake assembly and used for moving in the brake direction under driving of the brake assembly. The adjusting part is matched with the adjusting assembly and used for being driven by the adjusting assembly to move so as to adjust the initial position of the braking part when the braking part moves in the braking direction. The end, away from the brake part, of the adjusting part is a first curved surface protruding outwards, and the diameter of the first curved surface is larger than the width of the end, close to the brake part, of the adjusting part. In the process that the brake assembly drives the brake shoe to brake, the adjusting part can rotate in the adjusting assembly without changing the initial position of the brake part during braking, so that the stability of the brake shoe after the initial position is adjusted can be ensured, and a better braking effect can be achieved when the brake shoe is abraded.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle braking, in particular to a brake shoe and a brake device. Background Art

[0002] The brake system consists of a brake shoe and a brake assembly. Driven by an external force, the brake assembly rotates or moves, pushing the brake shoe in the braking direction (for example, expanding outward), causing the shoe to engage the wheel hub, generating friction and thus braking the wheel. After a period of use, the brake shoe's contact area with the wheel hub wears, increasing the distance between the shoe and the hub. When braking again, the brake assembly needs to move a greater distance to drive the brake shoe into contact with the wheel. Or, even at its maximum distance, the brake assembly may not be able to drive the brake shoe into contact with the wheel, affecting braking effectiveness. Utility Model Content

[0003] The purpose of the utility model is to provide a brake shoe and a brake device, aiming to solve the problem in the prior art that the brake shoe has a poor braking effect after being worn.

[0004] In the first aspect, the present application provides a brake shoe, characterized in that it includes a braking part and an adjusting part, one end of the braking part is connected to the adjusting part, and the other end of the braking part cooperates with the braking assembly for moving in the braking direction under the drive of the braking assembly; the adjusting part cooperates with the adjusting assembly for moving under the drive of the adjusting assembly to adjust the initial position of the braking part when it moves in the braking direction; the end of the adjusting part away from the braking part is a first curved surface protruding outward, and the diameter of the first curved surface is greater than the width of the end of the adjusting part close to the braking part.

[0005] In one embodiment, the adjusting portion and the braking portion are integrally formed.

[0006] In one embodiment, the brake shoe further includes a wear-resistant part covering the first curved surface.

[0007] In one embodiment, a groove is formed on the brake portion, and the adjustment portion is installed in the groove.

[0008] In one embodiment, the other end of the brake portion is a plane.

[0009] In a second aspect, the present application provides a brake device comprising a brake assembly, an adjustment assembly, and two brake shoes as described in the first aspect above, wherein the brake assembly and the adjustment assembly are respectively arranged at both ends of the brake shoes.

[0010] In one embodiment, the adjustment assembly includes a fixing member and an adjusting member, the fixing member has a limiting groove, and the two adjusting parts are adjustably positioned to extend into the two ends of the limiting groove; the adjusting member is rotatably installed in the limiting groove, and the adjusting member has a second curved surface with a variable diameter, and the adjusting part is used to contact different positions of the second curved surface when the adjusting member rotates to adjust the initial position when moving in the braking direction.

[0011] In one embodiment, the two side surfaces of the limiting groove are used to limit the adjusting portion in a first direction when the brake shoe is braking.

[0012] In one embodiment, the adjustment assembly further includes a cover plate mounted on the fixing member, and the cover plate and the bottom surface of the limiting groove are used to limit the adjustment portion in the second direction.

[0013] In one embodiment, the brake assembly includes a rotating member, and the rotating member is configured to rotate under the driving of an external force to drive the brake shoe to move in the braking direction.

[0014] The brake shoe provided by the present invention has the following beneficial effects: the brake shoe includes a braking portion and an adjustment portion, the adjustment portion cooperating with an adjustment assembly. When the brake shoe is worn, the adjustment assembly can move the adjustment portion by contacting the adjustment portion, thereby changing the initial position of the brake portion when moving in the braking direction, thereby achieving a better braking effect even when the brake shoe is worn. Furthermore, the end of the adjustment portion away from the braking portion is an outwardly convex curved surface, and the diameter of the first curved surface is greater than the width of the end of the adjustment portion closer to the braking portion. Therefore, the adjustment assembly can limit one end of the adjustment portion at the position where the first curved surface is located, and the other end of the adjustment portion is movable within the adjustment assembly. When the brake assembly drives the brake shoe to brake, the adjustment portion can rotate within the adjustment assembly without changing the initial position of the brake portion when braking. Therefore, the stability of the brake shoe after adjusting the initial position can be ensured, and a better braking effect can be achieved even when the brake shoe is worn. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0016] Figure 1 A schematic diagram of a brake shoe provided in one embodiment of the present utility model;

[0017] Figure 2 A schematic diagram of the assembly of a brake shoe, a brake assembly, and an adjustment assembly provided in one embodiment of the present invention;

[0018] Figure 3A schematic diagram of a brake shoe provided in another embodiment of the present invention;

[0019] Figure 4 A schematic diagram of a brake shoe provided in yet another embodiment of the present invention;

[0020] Figure 5 A schematic diagram of a fixing member provided in one embodiment of the present utility model;

[0021] Figure 6 A schematic diagram of an adjusting member provided in one embodiment of the present utility model;

[0022] Figure 7 A schematic diagram of a brake device provided in one embodiment of the present utility model;

[0023] Figure 8 A schematic diagram of a brake device provided in another embodiment of the present invention.

[0024] Among them, the reference numerals in the figures are:

[0025] 10. Brake shoe; 11. Braking part; 111. Groove; 12. Adjusting part; 121. First curved surface; 13. Wear-resistant part; 20. Braking assembly; 21. Rotating part; 22. Rocker arm; 23. Elastic part; 30. Adjusting assembly; 31. Fixing part; 311. Limiting groove; 32. Adjusting part; 321. Second curved surface; 33. Cover plate; 40. Housing. DETAILED DESCRIPTION

[0026] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout this specification, not all references are to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0028] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0030] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0031] Please refer to Figures 1 to 2 Now, the brake shoe in the embodiment of the present invention will be described.

[0032] The brake shoe 10 includes a braking part 11 and an adjusting part 12. One end of the braking part 11 is connected to the adjusting part 12, and the other end of the braking part 11 cooperates with the braking assembly and is used to move in the braking direction under the drive of the braking assembly; the adjusting part 12 cooperates with the adjusting assembly and is used to move under the drive of the adjusting assembly to adjust the initial position of the braking part 11 when it moves in the braking direction; the end of the adjusting part 12 away from the braking part 11 is a first curved surface 121 protruding outward, and the diameter of the first curved surface 121 is greater than the width of the end of the adjusting part 12 close to the braking part 11.

[0033] Specifically, the other end of the brake part 11 contacts the brake assembly, and the brake assembly drives the brake part 11 to move. The movement of the brake part 11 in the braking direction means that the brake part 11 moves in the direction close to the wheel assembly, thereby fitting with the wheel assembly and braking the wheel assembly through friction. After the brake shoe 10 has been used for a period of time, the part where the brake part 11 contacts the wheel assembly will wear out, causing the gap between the brake part 11 and the wheel assembly to increase when it is in the initial position. When the brake part 11 moves the same movement stroke under the drive of the brake assembly, it cannot fit with the wheel assembly, affecting the braking effect. By adjusting the adjustment component, the adjustment component drives the adjustment part 12 to move a certain distance, and the initial position of the brake part 11 when braking can be adjusted. When the brake part 11 moves the same movement stroke under the drive of the brake assembly, it can fit with the wheel assembly to achieve braking. Since the end of the adjusting portion 12 away from the brake portion is a first curved surface 121 protruding outward, and the diameter of the first curved surface 121 is larger than the width of the end of the adjusting portion 12 close to the brake portion, the adjusting component can limit one end of the adjusting portion 12 at the position where the first curved surface 121 is located, and the other end of the adjusting portion 12 is movable in the adjusting component. During the process of the brake component driving the brake shoe 10 to brake, the adjusting portion 12 can rotate in the adjusting component without changing the initial position of the brake portion 11 when braking. Therefore, the stability of the brake shoe 10 after adjusting the initial position can be guaranteed, and a better braking effect can be achieved when the brake shoe 10 is worn.

[0034] In one embodiment, if Figure 1 As shown, the adjusting portion 12 and the braking portion 11 are integrally formed, thereby facilitating processing.

[0035] Since the adjusting portion 12 rotates in the adjusting assembly during the braking process of the brake shoe, it is easy to wear. Figure 3 As shown, the brake shoe 10 further includes a wear-resistant member 13 covering the first curved surface 121, thereby increasing the wear resistance of the brake shoe 10 and ensuring the braking effect of the brake shoe 10. For example, the adjustment portion 12 and the brake portion 11 are integrally formed and made of aluminum alloy, and the wear-resistant member 13 is made of alloy steel or stainless steel.

[0036] In another embodiment, if Figure 4 As shown, the brake part 11 and the adjustment part 12 are two parts, and the materials of the brake part 11 and the adjustment part 12 can be the same or different. For example, the brake part 11 is provided with a groove 111, and the adjustment part 12 is installed in the groove 111, thereby improving the firmness of the connection between the brake part 11 and the adjustment part 12.

[0037] In one embodiment, the other end of the brake portion 11 is a plane, so that the stability of the brake shoe 10 can be improved when the brake assembly drives the brake portion 11 .

[0038] In one embodiment, the brake shoe 10 further includes a brake ring installed between the brake portion 11 and the wheel assembly, thereby reducing the friction force of the brake shoe 10 on the wheel assembly.

[0039] like Figures 5 to 8 As shown, the present application also provides a braking device, which can be a drum brake or a follow-up brake, etc. The braking device includes a braking assembly 20, an adjusting assembly 30, and the two aforementioned brake shoes 10. The braking assembly 20 and the adjusting assembly 30 are respectively arranged at the two ends of the brake shoe 10. By arranging the aforementioned brake shoe 10 in the braking device, when the brake shoe 10 is worn, the initial position of the brake portion 11 during braking can be adjusted by the adjusting assembly 30 without affecting the braking effect. At the same time, when the brake assembly 20 drives the brake shoe to brake, one end of the brake shoe 10 can rotate within the adjusting assembly 30 without changing the initial position of the brake shoe 10 during braking after adjustment. Therefore, the stability of the brake shoe after the initial position is adjusted can be ensured, and a better braking effect can be achieved even when the brake shoe is worn.

[0040] In one embodiment, the adjustment assembly 30 includes a fixing member 31 and an adjustment member 32. The fixing member 31 has a retaining slot 311, with two adjustment portions 12 adjustable in position extending into the respective ends of the retaining slot 311. The adjustment member 32 is rotatably mounted within the retaining slot 311 and has a second curved surface 321 with a variable diameter. The adjustment portions 12 are configured to contact different locations of the second curved surface 321 when the adjusting member rotates, thereby adjusting the initial position of the brake components 11 during braking. For example, when the adjusting member 32 rotates, the two adjustment portions 12 contact different locations of the second curved surface 321. The distance between the two adjustment portions 12 is equal to the diameter of the contact location of the second curved surface 321. When the adjusting member 32 rotates, causing the two adjustment portions 12 to contact the larger diameter location of the second curved surface 321, the distance between the two adjustment portions 32 increases, thereby changing the initial positions of the two brake components 11 during braking, i.e., moving the brake components 11 closer together in the braking direction. The rotation of the adjustment member 32 can be controlled by a motor.

[0041] In one embodiment, the two side surfaces of the limiting groove 311 are used to limit the adjustment portion 12 in the first direction when the brake shoe 10 is braking. Because the two adjustment portions 12 are in contact with the second curved surface 321, when the brake shoe 10 is braking, the adjustment portion 12 does not move in the first direction or in a direction perpendicular to the tangent of the second curved surface 321, but can only roll on the second curved surface 321. Therefore, when the brake shoe 10 is braking, the initial position of the brake shoe 10 does not change. Therefore, after the brake shoe 10 wears, the stability of the brake shoe 10 after adjusting its initial position is not affected, ensuring the braking effect of the brake shoe 10.

[0042] In one embodiment, the adjustment assembly 30 further includes a cover plate 33 mounted on the fixing member 31. The cover plate 33 and the bottom surface of the limiting groove 311 are used to limit the adjustment portion 12 in a second direction. The second direction is perpendicular to the first direction and is perpendicular to the cross-section of the bottom surface of the limiting groove 311. By limiting the adjustment portion 12 in the second direction, the stability of the brake shoe 10 during braking is further improved.

[0043] In one embodiment, the brake assembly 20 includes a rotating member 21, a rocker arm 22 connected to the rotating member 21, and an elastic member 23 connected to two brake shoes 10. The rocker arm 22 is used to drive the rotating member 21 to rotate during braking, causing the two brake shoes 10 to move in the braking direction. For example, when the brake cable is pulled, the brake cable drives the rocker arm 22 to rotate, causing the rocker arm 22 to rotate the rotating member 21, causing the rotating member 21 to contact the two brake shoes 10 and increase the distance between the two brake shoes 10. In other words, the two brake shoes 10 move in the braking direction and contact the wheel, thereby achieving braking. At this time, the elastic member 23 is in a stretched state. When the brake cable is released, the elastic member 23 resets, driving the two brake shoes 10 to reset, causing the brake shoes 10 to separate from the wheel.

[0044] In one embodiment, the brake device further includes a housing 40 , and the brake shoe 10 and the fixing member 31 are both installed in the housing 40 , thereby better ensuring the braking effect and adjustment accuracy.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A brake shoe, characterized in that: It includes a brake part and an adjustment part, one end of the brake part is connected to the adjustment part, and the other end of the brake part cooperates with the brake assembly, and is used to move in the braking direction under the drive of the brake assembly; the adjustment part cooperates with the adjustment assembly, and is used to move under the drive of the adjustment assembly to adjust the initial position of the brake part when it moves in the braking direction; the end of the adjustment part away from the brake part is a first curved surface protruding outward, and the diameter of the first curved surface is greater than the width of the end of the adjustment part close to the brake part.

2. The brake shoe according to claim 1, characterized in that: The adjusting portion and the braking portion are integrally formed.

3. The brake shoe according to claim 2, characterized in that: The brake shoe further includes a wear-resistant part covering the first curved surface.

4. The brake shoe according to claim 1, characterized in that: The brake part is provided with a groove, and the adjusting part is installed in the groove.

5. The brake shoe according to any one of claims 1 to 4, characterized in that: The other end of the brake portion is a plane.

6. A braking device, characterized in that: It comprises a brake assembly, an adjustment assembly and two brake shoes according to any one of claims 1 to 5, wherein the brake assembly and the adjustment assembly are respectively arranged at two ends of the brake shoes.

7. The brake device according to claim 6, characterized in that: The adjustment assembly includes a fixing part and an adjusting part, the fixing part has a limiting groove, and the two adjusting parts are adjustable in position and extend into the two ends of the limiting groove; the adjusting part is rotatably installed in the limiting groove, and the adjusting part has a second curved surface with variable diameter, and the adjusting part is used to contact different positions of the second curved surface when the adjusting part rotates to adjust the initial position when moving in the braking direction.

8. The brake device according to claim 7, characterized in that: The two side surfaces of the limiting groove are used to limit the adjusting portion in a first direction when the brake shoe is braking.

9. The brake device according to claim 7, characterized in that: The adjustment assembly further includes a cover plate mounted on the fixing member, and the cover plate and the bottom surface of the limiting groove are used to limit the adjustment portion in the second direction.

10. The brake device according to claim 7, characterized in that: The brake assembly includes a rotating member, which is used to rotate under the drive of an external force to drive the brake shoe to move in the braking direction.

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