Brake device, braking device and bicycle

Abstract

The utility model provides a brake device, a brake device and a bicycle, the brake device comprises a brake control assembly, a brake fine adjustment assembly and a shoe block assembly, the brake fine adjustment assembly comprises a ratchet wheel part and a pawl part, and the pawl part is clamped on the ratchet wheel part; the brake control assembly has a first moving range and a second moving range; when the brake control assembly moves in the first moving range, the brake control assembly drives the shoe block assembly to brake; when the brake control assembly moves to a second moving range due to abrasion of the shoe block assembly, the brake control assembly drives the ratchet part to move, and the clamping position of the pawl part on the ratchet part is changed; the ratchet wheel part is used for driving the shoe block assembly to move so as to adjust the initial position of the shoe block assembly during braking, and therefore a good braking effect can be achieved when the shoe block assembly is abraded.

Description

Technical Field

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

[0002] Braking systems are used to brake a vehicle's wheels. They typically include a shoe assembly and a brake control assembly. When braking is required, the brake control assembly drives the shoe assembly to move, causing the shoe assembly to rub against the wheel assembly, thereby braking the wheel assembly. Over time, the shoe assembly will wear out, requiring a greater range of motion to engage the wheel assembly, or even failing to engage the wheel assembly even at its maximum range of motion. This results in poor braking performance. Utility Model Content

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

[0004] In the first aspect, the present application provides a braking device, including a brake operating assembly, a brake fine-tuning assembly and a shoe assembly, the brake fine-tuning assembly including a ratchet member and a pawl member, the pawl member being engaged with the ratchet member; the brake operating assembly has a first moving range and a second moving range; when the brake operating assembly moves within the first moving range, the brake operating assembly drives the shoe assembly to brake; when the shoe assembly wears and causes the brake operating assembly to move to the second moving range, the brake operating assembly drives the ratchet member to move, and the engaging position of the pawl member on the ratchet member changes; the ratchet member is used to drive the shoe assembly to move so as to adjust the initial position of the shoe assembly when braking.

[0005] In one embodiment, the pawl member includes an escapement portion and an extension portion connected to one end of the escapement portion, and the escapement portion is engaged with the ratchet member. When the brake operating assembly moves to the second moving range, the brake operating assembly contacts the extension portion, causing the escapement portion to release the ratchet member, thereby causing the ratchet member to rotate, and further causing the engagement position of the escapement portion on the ratchet member to change.

[0006] In one embodiment, the brake fine-tuning assembly further includes a first elastic member for driving the ratchet member to rotate.

[0007] In one embodiment, the ratchet member includes a ratchet portion and a gear portion connected to each other, the pawl member is engaged with the ratchet portion, and the shoe assembly is configured to rotate under the drive of the gear portion.

[0008] In one embodiment, the ratchet member includes a first ratchet, and the pawl member is engaged with the first ratchet. When the brake operating assembly moves to the second moving range, the brake operating assembly contacts the first ratchet to drive the first ratchet to rotate, causing the engaging position of the pawl member on the first ratchet to change.

[0009] In one embodiment, the ratchet member includes a second ratchet, and the pawl member is engaged with the second ratchet. When the brake operating assembly moves to the second moving range, it abuts the second ratchet, and when it leaves the second moving range, it drives the second ratchet to rotate, so that the engaging position of the pawl member on the second ratchet changes.

[0010] In one embodiment, the brake operating assembly includes a brake member and a second pawl connected to one end of the brake member, and when the brake operating assembly leaves the second movement range, the second pawl drives the second ratchet to rotate.

[0011] In one embodiment, the brake fine-tuning assembly further includes a positioning member, and the ratchet member is rotatably mounted on the positioning member.

[0012] In one embodiment, the brake fine-tuning assembly further includes an adjusting assembly, wherein the adjusting assembly and the brake operating assembly are respectively located at two ends of the shoe assembly, and the adjusting assembly is configured to move under the drive of the ratchet member to drive the shoe assembly to move.

[0013] In one embodiment, the brake fine-tuning assembly further includes an external component connected to the adjustment assembly, wherein the external component is engaged with the ratchet component and is configured to rotate under the drive of the ratchet component to drive the adjustment assembly to move.

[0014] In one embodiment, the adjustment assembly includes a fixing member and an adjusting member, the fixing member has a limiting groove, and one end of the shoe assembly can be adjusted to extend into one end of the limiting groove; the adjusting member is rotatably installed in the limiting groove, and the adjusting member has a first curved surface with a variable diameter; the adjusting member is used to rotate under the drive of the ratchet member, so that the shoe assembly contacts different positions of the first curved surface to adjust the initial position of the shoe assembly when braking.

[0015] In one embodiment, the two side surfaces of the limiting groove are used to limit one end of the shoe assembly in a first direction when the shoe assembly is braking.

[0016] 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 one end of the shoe assembly in the second direction.

[0017] In one embodiment, the shoe assembly includes a brake shoe and a connecting piece connected to one end of the brake shoe, one end of the connecting piece is adjustably positioned to extend into the limiting groove, and the connecting piece is used to contact different positions of the first curved surface when the adjusting piece rotates to adjust the initial position of the shoe assembly during braking.

[0018] In a second aspect, the present application provides a braking device, comprising the braking device and a vehicle lock as described in the first aspect above.

[0019] In a third aspect, the present application provides a bicycle, comprising a bicycle body and the brake device as described in the second aspect above, wherein the brake device is mounted on the bicycle body.

[0020] The brake device provided by the present invention has the following beneficial effects: by providing a pawl member and a ratchet member, the pawl member engages with the ratchet member, and the brake operating assembly drives the shoe assembly to brake when it moves within a first range of movement. When the shoe assembly wears, causing the brake operating assembly to move to a second range of movement during braking, the brake operating assembly drives the ratchet member to rotate, and the engagement position of the pawl member on the ratchet member changes, thereby causing the ratchet member to rotate a certain angle. The ratchet member drives the shoe assembly to move, thereby changing the position of the shoe assembly, i.e., adjusting the initial position of the shoe assembly during braking to compensate for shoe assembly wear. After the shoe assembly wears, the distance between the shoe assembly and the wheel increases, and after the shoe assembly is adjusted, the distance between the shoe assembly and the wheel decreases, i.e., the distance between the shoe assembly and the wheel after the shoe assembly is adjusted returns to the distance before wear. When the brake operating assembly drives the shoe assembly again for braking, the movement stroke of the brake operating assembly is consistent with the movement stroke before wear, thereby achieving braking, thereby achieving a good braking effect even when the shoe assembly is worn. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 A schematic diagram of a brake device provided in one embodiment of the present utility model;

[0023] Figure 2 A diagram showing the working principle of a brake device provided in one embodiment of the present utility model;

[0024] Figure 3 A diagram showing the working principle of a brake device provided in one embodiment of the present utility model;

[0025] Figure 4 A schematic diagram of a ratchet member and a pawl member of a brake device provided in one embodiment of the present utility model;

[0026] Figure 5 A schematic diagram illustrating the rotation of an adjusting member of a brake device according to an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of the cooperation between the ratchet member and the pawl member of the brake device provided in one embodiment of the present utility model;

[0028] Figure 7 A schematic diagram of a ratchet member of a brake device provided in one embodiment of the present utility model;

[0029] Figure 8 A schematic diagram of a fixing member of a brake device provided in one embodiment of the present utility model;

[0030] Figure 9 A schematic diagram of the installation of the fixing member and the external member of the brake device provided in one embodiment of the present utility model;

[0031] Figure 10 A schematic diagram of the installation of a fixing member and an adjusting member of a brake device provided in one embodiment of the present utility model;

[0032] Figure 11 A schematic diagram of a fixing member of a brake device provided by an embodiment of the present invention from another perspective;

[0033] Figure 12 A schematic diagram of a brake device provided in another embodiment of the present invention;

[0034] Figure 13 A schematic diagram of a brake device provided in another embodiment of the present invention;

[0035] Figure 14 for Figure 13 The working principle diagram of the brake device shown;

[0036] Figure 15 A schematic diagram of a brake device provided in another embodiment of the present invention;

[0037] Figure 16 for Figure 15 The working principle diagram of the brake device shown;

[0038] Figure 17 A schematic diagram of a brake device provided by an embodiment of the present invention from another perspective.

[0039] Among them, the reference numerals in the figures are:

[0040] 10. Brake fine-tuning assembly; 11. Ratchet member; 111. Ratchet portion; 112. Gear portion; 113. First ratchet; 114. Second ratchet; 12. Pawl member; 121. Escapement portion; 1211. Escapement body; 1212. Pallet fork; 122. Extension portion; 13. Adjustment assembly; 131. Fixing member; 1311. Limiting groove; 1312. Mounting hole; 132. Adjustment member; 1321. First curved surface; 133. Cover plate; 134. Groove; 14. First elastic member; 15. External member; 16. Positioning member; 20. Brake operating assembly; 21. Rotating member; 22. Rocker arm; 23. Brake member; 24. Second pawl; 25. Second elastic member; 26. Brake cable; 30. Shoe assembly; 31. Brake shoe; 32. Connecting member; 40. Housing. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] Please refer to Figures 1 to 16 Now, the brake device in the embodiment of the present utility model is described.

[0047] The brake device provided in this application can be a drum brake or a follower brake. The brake device includes a brake fine-tuning assembly 10, a brake operating assembly 20, and a shoe assembly 30. The brake fine-tuning assembly 10 includes a ratchet 11 and a pawl 12, with the pawl 12 engaged with the ratchet 11. The brake operating assembly 20 has a first range of motion and a second range of motion. When the brake operating assembly 20 moves within the first range of motion, the brake operating assembly 20 drives the shoe assembly 30 to brake. When the shoe assembly 30 wears and moves to the second range of motion, the brake operating assembly 20 drives the ratchet 11 to move, and the engagement position of the pawl 12 on the ratchet 11 changes. The ratchet 11 is used to drive the shoe assembly 30 to move, thereby adjusting the initial position of the shoe assembly 30 during braking.

[0048] Specifically, movement of the brake operating assembly 20 within the first range of movement refers to reciprocating motion of the brake operating assembly 20 between an initial position and a braking position. When the brake operating assembly 20 moves from the initial position to the braking position, the brake operating assembly 20 drives the two shoe assemblies 30 to expand outward, causing both shoe assemblies 30 to move from their initial positions to positions engaging the wheel, thereby braking the wheel. When the brake operating assembly 20 moves within the first range of movement, the brake operating assembly 20 does not contact the ratchet member 11 or the pawl member 12. As the shoe assemblies 30 wear, the gap between the shoe assemblies 30 and the wheel increases. When the brake operating assembly 20 moves to the braking position, the shoe assemblies 30 cannot engage the wheel, i.e., a gap exists between the shoe assemblies 30 and the wheel. This allows the brake operating assembly 20 to continue moving outside the first range of movement, i.e., to the second range of movement. When the brake operating assembly 20 moves to the second range of movement, the brake operating assembly 20 contacts the ratchet member 11 or the pawl member 12, driving the ratchet member 11 to move. When the brake operating assembly 20 leaves the second range of motion, the ratchet member 11 stops rotating under the action of the pawl member 12, causing the pawl member 12 to change its engagement position on the ratchet member 11. When the ratchet member 11 moves, it drives the shoe assembly 30 to move. When the ratchet member 11 stops moving, the shoe assembly 30 also stops moving, causing the positions of the two shoe assemblies 30 to change to compensate for wear of the shoe assembly 30. In other words, the initial position of the shoe assembly 30 during braking changes. When braking again, the shoe assembly 30 begins moving from the new initial position. The brake operating assembly 20 maintains the same range of motion as before the shoe assembly 30 wore, driving the shoe assembly 30 to a braking position that engages the wheel, thereby achieving braking. This allows the initial position of the shoe assembly 30 to be adaptively adjusted in the event of wear, achieving a better braking effect.

[0049] In one embodiment, the brake operating assembly 20 includes a rotating member 21 and a rocker arm 22. When braking is required, the user squeezes the brake lever to rotate the rocker arm 22, which in turn rotates the rotating member 21. Alternatively, when braking is required, the user squeezes the brake lever to rotate the rotating member 21, thereby applying the brakes, which in turn rotates the rocker arm 22. The rotating member 21 contacts the shoe assembly 30 and has a curved surface with a variable diameter. Rotation of the rotating member 21 changes the contact position between the shoe assembly 30 and the rotating member 21, thereby increasing the distance between the shoe assemblies 30, thereby pushing the shoe assemblies 30 outward and expanding, thereby braking the wheel.

[0050] It can be understood that the brake device includes two shoe assemblies 30, which can be connected or not connected. During the rotation of the rotating member 21, one of the shoe assemblies 30 can be driven to expand outward, or both shoe assemblies 30 can be driven to expand outward at the same time.

[0051] When the shoe assembly 30 is not worn, during braking, the rocker arm 22 swings back and forth and does not contact the pawl member 12 and the ratchet member 11. When the shoe assembly 30 is worn, the rocker arm 22 contacts the pawl member 12 and drives the ratchet member 11 to rotate by driving the pawl member 12. Alternatively, when the shoe assembly 30 is worn, the rocker arm 22 drives the ratchet member 11 to rotate.

[0052] like Figures 1 to 7 As shown, in one embodiment, the pawl member 12 includes an escapement portion 121 and an extension portion 122 connected to one end of the escapement portion 121. The escapement portion 121 engages with the ratchet member 11. The escapement portion 121 includes an escapement body 1211 and two pallet forks 1212 located at both ends of the escapement body 1211. The extension portion 122 extends from one end of the escapement body 1211 in a direction different from the direction in which the pallet forks 1212 extend. Both pallet forks 1212 engage with the ratchet teeth of the ratchet member 11. When the brake operating assembly 20 moves to the second range of movement, the brake operating assembly 20 abuts against the extension portion 122, causing the escapement portion 121 to release the ratchet member 11, thereby rotating the ratchet member 11 and changing the engagement position of the escapement portion 121 on the ratchet member 11. Illustratively, the ratchet member 11 tends to rotate clockwise. When the brake operating assembly 20 is not in contact with the extension 122, the escapement 121 engages with the ratchet member 11, keeping the ratchet member 11 stationary. When the brake operating assembly 20 contacts the extension 122, the brake operating assembly 20 pushes the extension 122 during movement, thereby moving the escapement 121. This releases the ratchet member 11, causing the ratchet member 11 to rotate. Subsequently, under the action of the two pallet forks 1212, the ratchet member 11 rotates a certain angle before being reengaged by the two pallet forks 1212 to stop rotation, causing the escapement 121's engagement position on the ratchet member 11 to change. Illustratively, the engagement position of the two pallet forks 1212 on the ratchet member 11 moves from one ratchet tooth to an adjacent ratchet tooth.

[0053] By engaging the ratchet 11 with the escapement 121, the ratchet 11 can stop rotating after rotating a specified angle, thereby moving the shoe assembly 30 a corresponding distance to compensate for the initial position of the shoe assembly 30, thereby improving the compensation accuracy and thus improving the reliability of the brake.

[0054] In one embodiment, the brake fine-tuning assembly 10 further includes a first elastic member 14 for driving the ratchet member 11 to rotate. Exemplarily, the ratchet member 11 rotates clockwise under the action of the first elastic member 14 .

[0055] In another embodiment, the ratchet member 11 may also be driven to rotate by a motor.

[0056] The ratchet 11 is released by the escapement 121 and rotates, driving the adjustment assembly 13 to rotate, so as to adjust the initial positions of the two shoe assemblies 30 when braking.

[0057] In one embodiment, the ratchet member 11 includes a ratchet portion 111 and a gear portion 112 that are interconnected. The pawl member 12 engages with the ratchet portion 111, and the shoe assembly 30 is configured to rotate under the drive of the gear portion 112. Exemplarily, the gear portion 112 and the ratchet portion 111 are stacked, and rotation of the ratchet portion 111 drives the gear portion 112, thereby driving movement of the shoe assembly 30. The separate arrangement of the ratchet portion 111 and the gear portion 112 prevents interference between the components driving the ratchet member 11 and the components driven by the ratchet member 11, thereby improving the stability of the braking device.

[0058] In one embodiment, the brake fine-tuning assembly 10 further includes an adjustment assembly 13. The adjustment assembly 13 and the brake operating assembly 20 are respectively located at opposite ends of the shoe assembly 30. The adjustment assembly 13 is driven by the ratchet member 11 to move the shoe assembly 30. Specifically, the ratchet member 11 drives the shoe assembly 30 via the adjustment assembly 13 located at one end of the shoe assembly 30, thereby improving the stability of the brake fine-tuning assembly 10.

[0059] In one embodiment, the brake fine-tuning assembly 10 further includes an external member 15 connected to the adjustment assembly 13. The external member 15 engages with the ratchet member 11 and is driven by the ratchet member 11 to rotate, thereby driving the adjustment assembly 13. For example, the external member 15 is fixed to the adjustment assembly 13, and the gear portion 112 engages with the external member 15. Clockwise rotation of the gear portion 112 drives counterclockwise rotation of the external member 15, thereby driving the adjustment assembly 13 to which the external member 15 is fixed. The provision of the external member 15 allows for more flexible design of the position and size of the ratchet member 11, thereby improving the stability of the brake device.

[0060] In another embodiment, the adjusting assembly 13 is provided with a gear engaged with the ratchet member 11 , so that the adjusting assembly 13 can rotate under the drive of the ratchet member 11 .

[0061] like Figures 4 to 11As shown, in one embodiment, the adjustment assembly 13 includes a fixed member 131 and an adjustment member 132. The fixed member 131 has a limiting slot 1311, into which one end of the shoe assembly 30 can be adjusted. The adjustment member 132 is rotatably mounted within the limiting slot 1311 and has a first curved surface 1321 with a variable diameter. Driven by the ratchet member 11, the adjustment member 132 is configured to rotate, causing the shoe assembly 30 to contact different positions of the first curved surface 1321 to adjust the initial position of the shoe assembly 30 during braking. The external member 15 can be mounted on the adjustment member 132 to drive the adjustment member 132 to rotate. The cross-section of the adjustment member 132 is irregular, forming the first curved surface 1321 with a variable diameter. For example, the cross-section of the adjustment member 132 is formed by splicing two identical semicircles, whose diameters do not overlap, thereby forming the first curved surface 1321.

[0062] For example, since the adjusting member 132 has a first curved surface 1321 with a variable diameter, when the ratchet member 11 drives the adjusting member 132 to rotate, the two shoe assemblies 30 contact different positions of the first curved surface 1321. The distance between the two shoe assemblies 30 is equal to the diameter of the contact position of the first curved surface 1321. When the adjusting member 132 rotates, causing the two shoe assemblies 30 to contact the position with a larger diameter of the first curved surface 1321, the distance between the two shoe assemblies 30 increases, thereby changing the initial positions of the two shoe assemblies 30 when braking, that is, the gap between the shoe assembly 30 and the wheel is reduced. When braking again, while the movement stroke of the brake operating assembly 20 remains unchanged, the shoe assembly 30 can be made to fit with the wheel to generate friction, thereby achieving braking.

[0063] It is understandable that during the rotation of the adjusting member 132 , one of the shoe assemblies 30 may be driven to move, or both shoe assemblies 30 may be driven to move in opposite directions at the same time.

[0064] In one embodiment, the two side surfaces of the limiting groove 1311 are used to limit one end of the shoe assembly 30 in the first direction when the shoe assembly 30 brakes. Since the shoe assembly 30 contacts the first curved surface 1321, the two side surfaces of the limiting groove 1311 limit the shoe assembly 30 in the first direction when the shoe assembly 30 brakes. Therefore, when the shoe assembly 30 brakes, the shoe assembly 30 does not move in the first direction or in a tangential direction perpendicular to the first curved surface 1321, but can only roll on the first curved surface 1321. Therefore, when the shoe assembly 30 brakes, the initial position of the shoe assembly 30 does not change. Therefore, after the shoe assembly 30 wears, the stability of the shoe assembly 30 after adjusting the initial position will not be affected, further ensuring the braking effect of the shoe assembly 30. Among them, the two side surfaces of the limiting groove 1311 limit the shoe assembly 30, which means that one end of the shoe assembly 30 cannot move significantly in the first direction in the limiting groove 1311, and a certain gap can be left between one end of the shoe assembly 30 and the side surface of the limiting groove 1311, so that one end of the shoe assembly 30 can rotate in the limiting groove 1311.

[0065] like Figure 1 As shown, in one embodiment, the adjustment assembly 13 further includes a cover plate 133 mounted on the fixing member 131. The cover plate 133 and the bottom surface of the limiting groove 1311 are used to limit the shoe assembly 30 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 1311. By limiting the shoe assembly 30 in the second direction, the stability of the shoe assembly 30 during braking is further improved, further enhancing the braking effect.

[0066] In one embodiment, a mounting hole 1312 is defined at the bottom of the retaining groove 1311, and the adjusting member 132 is rotatably mounted within the mounting hole 1312. A groove 134 is defined on the fixing member 131, communicating with the mounting hole 1312. This allows the external member 15 to extend into the groove 134 and connect to the adjusting member 132, thereby driving the adjusting member 132 to rotate. By defining the groove 134 on the fixing member 131 for mounting the external member 15, the number of components required to secure the external member 15 to the fixing member 131 can be reduced, thereby simplifying the manufacturing process.

[0067] like Figure 12 As shown, in one embodiment, the shoe assembly 30 includes a brake shoe 31 and a connector 32 connected to one end of the brake shoe 31. One end of the connector 32 is adjustably positioned to extend into a retaining groove 1311. The connector 32 is configured to contact different positions of the first curved surface 1321 when the adjusting member 132 rotates, thereby adjusting the initial position of the connector 32 during braking of the brake shoe 31. By connecting the brake shoe 31 and the connector 32, with one end of the connector 32 extending into the retaining groove 1311, the difficulty of processing and installing the brake shoe 31 can be reduced.

[0068] In another embodiment, the brake shoe 31 and the connector 32 are integrally formed, thereby reducing the number of installation steps and lowering production costs.

[0069] like Figure 13 and Figure 14 As shown, in one embodiment, the ratchet member 11 includes a first ratchet 113, and the pawl member 12 engages with the first ratchet 113. When the brake operating assembly 20 moves to the second range of movement, the brake operating assembly 20 contacts the first ratchet 113, driving the first ratchet 113 to rotate, causing the pawl member 12 to change its engagement position on the first ratchet 113. The rotation of the first ratchet 113 drives the shoe assembly 30 to move the adjustment assembly 13 to adjust the initial positions of the two shoe assemblies 30 during braking. For example, when the shoe assembly 30 wears, during the braking process, the rocker arm 22 contacts the first ratchet 113, driving the first ratchet 113 to rotate clockwise. Subsequently, the first ratchet 113 stops rotating under the action of the pawl member 12, causing the external component 15 to rotate counterclockwise by a certain angle, thereby driving the adjustment assembly 13 to rotate, thereby adjusting the initial positions of the shoe assembly 30 during braking.

[0070] In one embodiment, the brake operating assembly 20 includes a brake member 23 and a second pawl 24 connected to one end of the brake member 23. The brake member 23 may be a rocker arm 22, or may include the rocker arm 22 and a rotating member 21. The rocker arm 22 and the rotating member 21 may be integrally formed. When the brake operating assembly 20 moves to the second range of movement, the second pawl 24 drives the first ratchet 113 to rotate. Specifically, a second elastic member 25 is mounted on the brake member 23 to drive the second pawl 24 to rotate. When the brake operating assembly 20 moves to the second range of movement, the second pawl 24 drives the first ratchet 113 to rotate and compresses the second elastic member 25. When the brake operating assembly 20 leaves the second range of movement, the second elastic member 25 returns from the compressed state to its initial state, thereby preventing collision with the first ratchet 113 during rotation. When the first ratchet 113 rotates, the pawl member 12 re-engages on the first ratchet 113, causing the first ratchet 113 to stop rotating, so that the first ratchet 113 can drive the adjustment assembly 13 to rotate a specified angle, thereby compensating the position of the shoe assembly 30 by a corresponding distance, improving the compensation accuracy, and thereby improving the reliability of the brake.

[0071] like Figure 15 and Figure 16As shown, in one embodiment, the ratchet member 11 includes a second ratchet 114, and the pawl member 12 engages with the second ratchet 114. When the brake operating assembly 20 moves to the second range of movement, it contacts the second ratchet 114. When it leaves the second range of movement, it drives the second ratchet 114 to rotate, causing the pawl member 12 to change its engagement position with the second ratchet 114. For example, when the shoe assembly 30 wears, during braking, the brake operating assembly 20 moves to the second range of movement, and the rocker arm 22 contacts the second ratchet 114. When the brake operating assembly 20 returns to its initial position from the second range of movement, the rocker arm 22 drives the second ratchet 114 to rotate counterclockwise. Subsequently, the second ratchet 114 stops rotating under the action of the pawl member 12, causing the external component 15 to rotate clockwise a certain distance, thereby driving the adjustment assembly 13 to rotate a certain angle, thereby adjusting the initial position of the shoe assembly 30 during braking.

[0072] In one embodiment, the brake operating assembly 20 includes a brake member 23 and a second pawl 24 connected to one end of the brake member 23. The brake member 23 may be a rocker arm 22, or may include the rocker arm 22 and a rotating member 21. The rocker arm 22 and rotating member 21 may be integrally formed. When the brake operating assembly 20 moves to a second range of motion, the second pawl 24 engages with the second ratchet 114. When the brake operating assembly 20 leaves the second range of motion, the second pawl 24 drives the second ratchet 114 to rotate. Specifically, a second elastic member 25 is mounted on the brake member 23 to drive the second pawl 24 to rotate. When the brake operating assembly 20 moves to the second range of motion, the second pawl 24 contacts the second ratchet 114, and the second elastic member 25 is compressed. When the brake operating assembly 20 leaves the second range of motion, the second elastic member 25 returns from the compressed state to its initial state, engaging with the second ratchet 114 and driving the second ratchet 114 to rotate. When the second ratchet 114 rotates, the pawl member 12 re-engages on the second ratchet 114, causing the second ratchet 114 to stop rotating, so that the second ratchet 114 can drive the adjustment assembly 13 to rotate a specified angle, thereby compensating the position of the shoe assembly 30 by a corresponding distance, improving the compensation accuracy, and thereby improving the reliability of the brake.

[0073] like Figure 1 As shown, in one embodiment, the brake device further includes a positioning member 16, which can be located between the two shoe assemblies 30. The ratchet member 11 is rotatably mounted on the positioning member 16, thereby saving installation space. In one embodiment, the brake device further includes a housing 40, in which the brake fine adjustment assembly 10, the brake operating assembly 20, the ratchet member 11, the pawl member 12, and the shoe assembly 30 are all located. The positioning member 16 is fixedly mounted on the housing 40, so that the housing 40 protects the internal components and improves the reliability of the brake device.

[0074] like Figure 17 As shown, in one embodiment, the brake operating assembly 20 further includes a brake cable 26 for driving the rotating member 21. For example, the brake cable 26 is located outside the housing 40 and connected to the rocker arm 22. By pulling the brake cable 26, the rotating member 21 is rotated, causing the shoe assembly 30 to expand outward, thereby braking, thereby preventing jamming during braking.

[0075] This application also provides a braking device comprising the aforementioned braking device and a bicycle lock. The bicycle lock can be a smart lock controlled by a motor and used to brake the wheel hub. Using the aforementioned braking device on shared bicycles or shared electric bicycles can reduce maintenance costs.

[0076] The present application also provides a bicycle, comprising a bicycle body and the above-mentioned brake device, wherein the brake device is mounted on the bicycle body. A bicycle using the above-mentioned brake device can reduce the number of maintenance times of the shoe assembly, thereby reducing maintenance costs.

[0077] 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 braking device, characterized in that: The invention comprises a brake operating assembly, a brake fine-tuning assembly and a shoe assembly, wherein the brake fine-tuning assembly comprises a ratchet member and a pawl member, wherein the pawl member is engaged with the ratchet member; the brake operating assembly has a first movement range and a second movement range; when the brake operating assembly moves within the first movement range, the brake operating assembly drives the shoe assembly to brake; When the shoe assembly is worn and causes the brake operating assembly to move to the second movement range, the brake operating assembly drives the ratchet member to move, and the engaging position of the pawl member on the ratchet member changes; The ratchet member is used to drive the shoe assembly to move so as to adjust the initial position of the shoe assembly during braking.

2. The brake device according to claim 1, characterized in that: The pawl member includes an escapement portion and an extension portion connected to one end of the escapement portion, and the escapement portion is engaged with the ratchet member. When the brake operating assembly moves to the second moving range, the brake operating assembly abuts against the extension portion, causing the escapement portion to release the ratchet member, thereby causing the ratchet member to rotate, and further causing the engagement position of the escapement portion on the ratchet member to change.

3. The brake device according to claim 2, characterized in that: The brake fine-tuning assembly further includes a first elastic member for driving the ratchet member to rotate.

4. The brake device according to claim 1, wherein: The ratchet member includes a ratchet portion and a gear portion that are connected to each other. The pawl member is engaged with the ratchet portion. The shoe assembly is used to rotate under the drive of the gear portion.

5. The brake device according to claim 1, wherein: The ratchet member includes a first ratchet, and the pawl member is engaged with the first ratchet. When the brake operating assembly moves to the second moving range, the brake operating assembly contacts the first ratchet to drive the first ratchet to rotate, so that the engagement position of the pawl member on the first ratchet changes.

6. The brake device according to claim 1, wherein: The ratchet member includes a second ratchet, and the pawl member is engaged with the second ratchet. When the brake operating assembly moves to the second moving range, it abuts the second ratchet, and when it leaves the second moving range, it drives the second ratchet to rotate, so that the engaging position of the pawl member on the second ratchet changes.

7. The brake device according to claim 6, characterized in that: The brake operating assembly includes a brake member and a second pawl connected to one end of the brake member. When the brake operating assembly leaves the second moving range, the second pawl drives the second ratchet to rotate.

8. The brake device according to any one of claims 1 to 7, characterized in that: The brake fine-tuning assembly further includes a positioning member, and the ratchet member is rotatably mounted on the positioning member.

9. The brake device according to any one of claims 1 to 7, characterized in that: The brake fine-tuning assembly further includes an adjusting assembly. The adjusting assembly and the brake operating assembly are respectively located at two ends of the shoe assembly. The adjusting assembly is used to move under the drive of the ratchet member to drive the shoe assembly to move.

10. The brake device according to claim 9, characterized in that: The brake fine-tuning assembly further includes an external component connected to the adjusting assembly, wherein the external component is engaged with the ratchet component and is configured to rotate under the drive of the ratchet component to drive the adjusting assembly to move.

11. The brake device according to claim 9, characterized in that: The adjusting component includes a fixing part and an adjusting part, the fixing part has a limiting groove, and one end of the shoe assembly can be adjusted to extend into one end of the limiting groove; the adjusting part is rotatably installed in the limiting groove, and the adjusting part has a first curved surface with a variable diameter; the adjusting part is used to rotate under the drive of the ratchet part, so that the shoe assembly contacts different positions of the first curved surface to adjust the initial position of the shoe assembly when braking.

12. The brake device according to claim 11, characterized in that: The two side surfaces of the limiting groove are used to limit one end of the shoe assembly in a first direction when the shoe assembly is braking.

13. The brake device according to claim 11, wherein: 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 one end of the shoe assembly in the second direction.

14. The brake device according to claim 11, wherein: The shoe assembly includes a brake shoe and a connecting piece connected to one end of the brake shoe, one end of the connecting piece is adjustably positioned to extend into the limiting groove, and the connecting piece is used to contact different positions of the first curved surface when the adjusting piece rotates to adjust the initial position of the shoe assembly during braking.

15. A braking device, characterized in that: The invention comprises a brake device and a vehicle lock as described in any one of claims 1 to 14.

16. A bicycle, characterized in that: The invention comprises a bicycle body and the brake device according to claim 15 , wherein the brake device is mounted on the bicycle body.

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