Brake adjusting assembly, brake device and brake device

Abstract

The invention relates to the technical field of vehicle braking, and provides a brake adjusting assembly, a brake device and a brake device. The brake adjusting assembly comprises a first rocker arm, a cam part and an escapement mechanism, the cam part and the escapement mechanism are both installed on the first rocker arm, and the escapement mechanism is used for synchronously moving with the first rocker arm so as to drive the cam part to move in the brake direction; the escapement mechanism comprises an escapement piece and a ratchet wheel piece, the escapement piece is clamped on the ratchet wheel piece, and when the first rocker arm moves to a preset area, the escapement piece is used for releasing the ratchet wheel piece so as to drive the cam piece to rotate by a preset angle, and therefore the initial position of the cam piece moving in the braking direction is adjusted. And during next braking, the cam piece moves from the new initial position to the braking direction, so that the abrasion of the brake shoe can be compensated, the movement stroke of the first rocker arm during braking is not increased, and the braking effect of the brake shoe is not influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle braking, and in particular to a brake adjustment component, a brake device and a brake device. Background Art

[0002] In bicycles or electric bicycles, the braking effect of the vehicle has an important impact on the vehicle performance. The braking of the vehicle is generally achieved through the friction between the brake shoe and the wheel. For example, the user pulls the brake cable, which drives the brake shoe to fit the wheel, thereby braking the wheel. After the brake shoe is used for a period of time, it will wear out, affecting the braking effect of the vehicle. Summary of the invention

[0003] The object of the present invention is to provide a brake adjustment assembly, a brake device and a brake device, aiming to solve the problem of poor braking effect after the brake shoe is worn in the prior art.

[0004] In the first aspect, the present application provides a brake adjustment assembly, comprising a first rocker arm, a cam member and an escapement mechanism, wherein the cam member and the escapement mechanism are both mounted on the first rocker arm, and the escapement mechanism is used to move synchronously with the first rocker arm to drive the cam member to move in the braking direction; the escapement mechanism comprises an escapement member and a ratchet member, and the escapement member is engaged with the ratchet member, and when the first rocker arm moves to a preset area, the escapement member is used to release the ratchet member to drive the cam member to rotate a preset angle, thereby adjusting the initial position of the cam member to move in the braking direction.

[0005] In one embodiment, the brake adjustment assembly also includes a second rocker arm, which is mounted on the cam member and is used to move synchronously with the escapement mechanism and the first rocker arm to drive the cam member to move in the braking direction; the second rocker arm is used to drive the cam member to rotate a preset angle under the drive of the ratchet member.

[0006] In one embodiment, the second rocker arm includes a gear and a limiting member, the gear is mounted on the cam member and meshes with the ratchet member, and the gear is used for unidirectional rotation under the action of the limiting member.

[0007] In one embodiment, the limiting member includes a first pawl installed on the first rocker arm, and a first elastic member providing a restoring force for the first pawl.

[0008] In one embodiment, the ratchet member includes a first ratchet portion and a first gear portion which are connected to each other, the escapement member is engaged with the first ratchet portion, and the first gear portion is used to drive the cam member to rotate.

[0009] In one embodiment, the first gear portion is rotatably mounted on the first ratchet portion, the escapement is used to release the first ratchet portion when the first rocker arm moves to a preset area, and the first gear portion is used to rotate under the drive of the first ratchet portion when the first rocker arm is reset to drive the cam portion to rotate a preset angle.

[0010] In one embodiment, a first protrusion is provided on the first gear portion, a first groove is provided on the first ratchet portion, and the first protrusion is slidably installed in the first groove.

[0011] In one embodiment, the ratchet member also includes a fourth elastic member and a fifth elastic member, the fourth elastic member is installed between the first ratchet part and the first gear part, and is used to provide a restoring torque for the first gear part, and the fifth elastic member is installed between the first ratchet part and the first rocker arm, and is used to provide a restoring torque for the first ratchet part.

[0012] In one embodiment, the escapement comprises an escapement portion and an extension portion which are connected to each other, and the extension portion is used to abut against a blocking member when the first rocker arm moves to a preset area to drive the escapement portion to move, thereby releasing the ratchet member.

[0013] In one embodiment, the ratchet member is mounted on the cam member.

[0014] In one embodiment, the brake adjustment assembly further includes a second pawl mounted on the first rocker arm, and the second pawl is used to limit the one-way rotation of the ratchet member.

[0015] In a second aspect, the present application provides a brake device, comprising a brake shoe and the brake adjustment assembly described in the first aspect, wherein the cam member is used to contact the brake shoe to drive the brake shoe to move in a braking direction.

[0016] In a third aspect, the present application provides a braking device, comprising a vehicle lock and the braking device described in the second aspect.

[0017] The beneficial effect of the brake adjustment assembly provided by the present invention is: by installing the cam member and the escapement mechanism on the first rocker arm, the escapement mechanism moves synchronously with the first rocker arm to drive the cam member to move in the braking direction, so that the cam member can drive the brake shoe to brake. When the brake shoe is worn, the movement stroke of the brake shoe increases during braking, thereby increasing the movement stroke of the cam member, and then the first rocker arm can move to a preset area. When the first rocker arm moves to the preset area, the escapement member releases the ratchet member to drive the cam member to rotate a preset angle, thereby adjusting the initial position of the cam member moving in the braking direction, and then adjusting the initial position of the brake shoe moving in the braking direction. When braking next time, the cam member and the brake shoe move from the new initial position to the braking direction, thereby compensating for the wear of the brake shoe, without increasing the movement stroke of the cam member and the brake shoe when moving in the braking direction, and thus not increasing the movement stroke of the first rocker arm when braking, and not affecting the braking effect of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0019] Figure 1 A schematic diagram of a brake adjustment assembly provided in one embodiment of the present invention; Figure 2 A schematic diagram of a brake adjustment assembly provided by an embodiment of the present invention from another perspective; Figure 3 A working principle diagram of a brake adjustment assembly provided in one embodiment of the present invention; Figure 4 A schematic diagram of braking when the shoe of the brake adjustment assembly provided by an embodiment of the present invention is not worn; Figure 5 A schematic diagram of braking when a shoe of a brake adjustment assembly provided by an embodiment of the present invention is worn; Figure 6 A schematic diagram of adjusting the position of a cam member of a brake adjustment assembly provided by an embodiment of the present invention; Figure 7 A schematic diagram of a brake adjustment assembly provided in another embodiment of the present invention; Figure 8 A schematic diagram of the connection relationship between the first ratchet portion and the first gear portion of a brake adjustment assembly provided by another embodiment of the present invention; Fig. 9 A schematic diagram of the connection relationship between the first ratchet portion and the first rocker arm of a brake adjustment assembly provided in another embodiment of the present invention; Fig.10 A schematic diagram of a brake adjustment assembly provided in yet another embodiment of the present invention; Fig.11A schematic diagram of a brake adjustment assembly from another perspective provided by yet another embodiment of the present invention; Fig.12 A schematic diagram of a braking device provided in one embodiment of the present invention.

[0020] Among them, the reference numerals in the figure are: 10. brake adjustment assembly; 11. first rocker arm; 12. cam member; 13. escapement mechanism; 131. escapement member; 1311. escapement portion; 1312. extension portion; 1313. escapement fork; 132. ratchet member; 1321. first ratchet portion; 1322. first gear portion; 1323. second ratchet portion; 1324. second gear portion; 1325. first protrusion; 1326. first groove; 1327. fourth elastic member; 1328. fifth elastic member; 14. second rocker arm; 141. gear; 142. stop member; 1421. first pawl; 1422. first elastic member; 15. second elastic member; 16. third elastic member; 17. second pawl; 18. driving member; 20. brake shoe; 30. brake line; 40. blocking member; 50. housing; 51. mounting groove. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, 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 be used to explain the present invention, and should not be construed as limiting the present invention.

[0022] Reference throughout the 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 the specification, not all references are to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0023] 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 drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Please refer to Figures 1 to 11 Now, the brake adjustment assembly in the embodiment of the present invention is described.

[0027] like Figures 1 to 3 As shown, the brake adjustment assembly 10 includes a first rocker arm 11, a cam member 12 and an escapement mechanism 13. The cam member 12 and the escapement mechanism 13 are both mounted on the first rocker arm 11. The escapement mechanism 13 is used to move synchronously with the first rocker arm 11 to drive the cam member 12 to move in the braking direction; the escapement mechanism 13 includes an escapement member 131 and a ratchet member 132. The escapement member 131 is engaged with the ratchet member 132. When the first rocker arm 11 moves to a preset area, the escapement member 131 is used to release the ratchet member 132 to drive the cam member 12 to rotate a preset angle, thereby adjusting the initial position of the cam member 12 to move in the braking direction.

[0028] Specifically, the first rocker arm 11 moves under the drive of an external force, and the escapement mechanism 13 moves synchronously with the first rocker arm 11 under the drive of the first rocker arm 11, thereby driving the cam member 12 to move in the braking direction. The cam member 12 conflicts with the brake shoe 20, thereby driving the brake shoe 20 to move in the braking direction (i.e., the direction close to the wheel). When the brake shoe 20 fits the wheel, the first rocker arm 11 cannot continue to move, and the cam member 12 also stops moving, thereby achieving braking. The brake shoe 20 will wear after being used for a period of time, thereby increasing the gap between the brake shoe 20 and the wheel. The first rocker arm 11 moves under the drive of an external force, and the brake shoe 20 can only fit the wheel when it moves a greater distance. The more the brake shoe 20 wears, the larger the gap between the brake shoe 20 and the wheel, and the longer the movement stroke of the first rocker arm 11 during braking. After the brake shoe 20 wears to a certain extent, the first rocker arm 11 can move to a preset area under the action of an external force. When the first rocker arm 11 moves to the preset area, the escapement 131 releases the ratchet 132, causing the ratchet 132 to rotate, thereby driving the cam member 12 to rotate relative to the first rocker arm 11 by a preset angle, and the cam member 12 further drives the brake shoe 20 to move in a direction close to the wheel. The position of the cam member 12 after rotating the preset angle is the initial position of the cam member 12 during the next braking, and the position of the brake shoe 20 after moving is the initial position of the brake shoe 20 during the next braking. When braking next time, the distance between the worn brake shoe 20 and the wheel decreases, and the initial position of the first rocker arm 11 remains unchanged. Without increasing the movement stroke of the first rocker arm 11, the brake shoe 20 can be driven by the cam member 12 to move to a position in contact with the wheel to achieve braking. Therefore, even if the brake shoe 20 is worn, the braking effect is not affected.

[0029] It can be understood that the movement of the cam member 12 in the braking direction may refer to the cam member 12 rotating in a preset direction around the rotation axis to push the brake shoe 20 in the braking direction, or may refer to the cam member 12 sliding in a straight line in a preset direction to push the brake shoe 20 in the braking direction.

[0030] In one embodiment, the brake adjustment assembly 10 further includes a second rocker arm 14, which is mounted on the cam member 12 and is used to move synchronously with the escapement mechanism 13 and the first rocker arm 11 to drive the cam member 12 to move in the braking direction; the second rocker arm 14 is used to drive the cam member 12 to rotate by a preset angle under the drive of the ratchet member 132. Specifically, the second rocker arm 14 is mounted on the first rocker arm 11, the first rocker arm 11 is rotatably mounted on the cam member 12, and the second rocker arm 14 is fixedly mounted on the cam member 12. Therefore, the cam member 12 can rotate synchronously with the first rocker arm 11 under the action of the second rocker arm 14, and can also rotate relative to the first rocker arm 11. When the first rocker arm 11 moves under the drive of an external force, the second rocker arm 14 moves synchronously with the escapement mechanism 13 and the first rocker arm 11, and the second rocker arm 14 drives the cam member 12 to rotate. When the first rocker arm 11 moves to the preset area, the escapement 131 releases the ratchet 132, causing the ratchet 132 to rotate, and the second rocker arm 14 rotates relative to the first rocker arm 11 under the drive of the ratchet 132, thereby driving the cam member 12 to rotate relative to the first rocker arm 11 by a preset angle to change the initial position of the cam member 12 moving in the braking direction. By connecting the second rocker arm 14 between the escapement 13 and the cam member 12, the rotation angle of the cam member 12 can be controlled by controlling the rotation angle of the second rocker arm 14, thereby improving the control accuracy of the escapement 13 on the cam member 12. At the same time, by setting the angle relationship between the second rocker arm 14 and the ratchet 132, the cam member 12 can be adjusted to a suitable angle after the brake shoe 20 is worn, thereby increasing the number of adjustments of the cam member 12 and extending the service life of the brake adjustment assembly 10.

[0031] In one embodiment, the second rocker arm 14 includes a gear 141 and a stopper 142. The gear 141 is fixedly mounted on the cam member 12 and meshes with the ratchet member 132. The gear 141 is used to rotate unidirectionally under the action of the stopper 142. Specifically, when the ratchet member 132 rotates, the gear 141 is driven to rotate. When the ratchet member 132 stops rotating, the gear 141 is in a relatively static state with the first rocker arm 11 under the action of the stopper 142 and the ratchet member 132, so as to move synchronously with the first rocker arm 11.

[0032] In one embodiment, the limiting member 142 includes a first pawl 1421 mounted on the first rocker arm 11, and a first elastic member 1422 providing a restoring force for the first pawl 1421. Specifically, the first pawl 1421 is engaged with the gear 141, and when the ratchet member 132 rotates, it provides power to the gear 141, and the gear 141 pushes the first pawl 1421 and rotates with the ratchet member 132. When the ratchet member 132 stops rotating, the gear 141 stops rotating, and at the same time, the first pawl 1421 is reset under the action of the first elastic member 1422 and is reengaged with the gear 141 to limit the gear 141 from rotating in the reverse direction.

[0033] In another embodiment, the second rocker arm 14 may also be a one-way bearing.

[0034] In one embodiment, the escapement 131 includes an escapement portion 1311 and an extension portion 1312 connected to each other, the escapement portion 1311 includes two escapement forks 1313, the two escapement forks 1313 are engaged on the ratchet member 132, and the extension portion 1312 is used to contact the blocking member when the first rocker arm 11 moves to a preset area to drive the escapement 1311 to move, thereby releasing the ratchet member 132, so that the cam member 12 can be automatically adjusted, and the cost of the brake adjustment assembly 10 can be reduced. Among them, the blocking member can be set on the housing where the brake adjustment assembly 10 is located, and can also be set on a bicycle or a bicycle lock. The brake adjustment assembly 10 also includes a second elastic member 15 that provides a restoring force for the escapement 131, so that the escapement 131 can be reset after the cam member 12 is adjusted, which is used for the next adjustment of the cam member 12.

[0035] For example, Figure 4 As shown, the escapement mechanism 13 and the gear 141 are both arranged on the first rocker arm 11. When the brake shoe 20 is not worn, the brake line 30 drives the first rocker arm 11, and the first rocker arm 11 rotates counterclockwise. One of the escapement forks 1313 is engaged with the ratchet 132, so that the escapement mechanism 13 and the first ratchet 1421 limit the rotation of the gear 141 from two directions respectively, so that the gear 141 rotates counterclockwise with the first rocker arm 11, and then drives the cam member 12 to rotate, so as to drive the brake shoe 20 to move in the braking direction to achieve braking. At this time, the escapement member 131 will not contact the blocking member 40. Figure 1 As shown, when the brake wire 30 is released, the gear 141 rotates clockwise along with the first rocker arm 11, driving the cam member 12 to rotate, thereby resetting the brake shoe 20.

[0036] like Figure 5 As shown, when the brake shoe 20 is worn to a certain extent, the first rocker arm 11 rotates counterclockwise under the drive of the brake wire 30, and the escapement 131 contacts the blocking member 40 to push the escapement 131 to move, so that one of the escapement forks 1313 is separated from the ratchet member 132, and the other escapement fork 1313 is engaged with the ratchet member 132. Figure 6As shown, when the brake line 30 is released, the escapement 131 is reset under the action of the second elastic member 15, so that after the ratchet member 132 rotates clockwise by an angle of one tooth, one of the escapement forks 1313 is again engaged with the ratchet member 132. When the ratchet member 132 rotates clockwise, it provides rotational power for the gear 141, and the gear 141 pushes the first ratchet 1421 and rotates counterclockwise. After the gear 141 rotates a certain angle, the first ratchet 1421 is again engaged with the gear 141 to limit the gear 141 from rotating in the clockwise direction. The rotation of the gear 141 drives the cam member 12 to rotate, thereby adjusting the initial position of the cam member 12, and further adjusting the initial position of the brake shoe 20 when braking.

[0037] In another embodiment, the brake adjustment assembly 10 further includes a motor for driving the escapement 131. For example, when the first rocker arm 11 moves to a preset area, the motor drives the escapement 131 to move, so that the escapement 131 releases the ratchet 132 to drive the cam 12 to rotate.

[0038] In one embodiment, the ratchet member 132 includes a first ratchet portion 1321 and a first gear portion 1322 connected to each other, the escapement 131 is engaged with the first ratchet portion 1321, and the first gear portion 1322 is used to drive the cam member 12 to rotate. Exemplarily, the first gear portion 1322 is engaged with the gear 141, the escapement 131 releases the first ratchet portion 1321, and the first ratchet portion 1321 rotates, thereby rotating the first gear portion 1322, and the first gear portion 1322 drives the cam member 12 to rotate through the gear 141. By providing the first ratchet portion 1321 and the first gear portion 1322 connected to each other, the ratchet member 132 can better adapt to the escapement 131 and the gear 141, thereby improving the adjustment accuracy of the cam member 12.

[0039] The first ratchet portion 1321 and the first gear portion 1322 can be placed overlappingly, the distance between the first ratchet portion 1321 and the plane where the first rocker arm 11 is located is a first distance, the distance between the first gear portion 1322 and the plane where the first rocker arm 11 is located is a second distance, and the first distance and the second distance are different. The distance between the escapement 131 and the plane where the first rocker arm 11 is located is also the first distance, so that the escapement 131 can be engaged with the first ratchet portion 1321. The distance between the gear 141 and the plane where the first rocker arm 11 is located is also the second distance, so that the gear 141 can be meshed with the first gear portion 1322. The first ratchet portion 1321 and the first gear portion 1322 can be fixedly connected or integrally formed, and the first ratchet portion 1321 and the first gear portion 1322 can also be movably connected.

[0040] In one embodiment, if Figures 7 to 9As shown, the first gear portion 1322 is rotatably mounted on the first ratchet portion 1321, the escapement 131 is used to release the first ratchet portion 1321 when the first rocker arm 11 moves to a preset area, and the first gear portion 1322 is used to rotate under the drive of the first ratchet portion 1321 when the first rocker arm 11 is reset, so as to drive the cam member 12 to rotate by a preset angle. Specifically, when the brake shoe 20 is worn to a certain extent, the first rocker arm 11 rotates counterclockwise under the drive of the brake line 30, and the escapement 131 contacts the blocking member when it moves to the preset area to push the escapement 131 to move, so that the escapement 131 releases the first ratchet portion 1321, and the first ratchet portion 1321 rotates clockwise, and the first gear portion 1322 cannot rotate under the action of the gear 141. When the brake line 30 is released, the first rocker arm 11 rotates clockwise until the first rocker arm 11 is reset. Among them, when the first rocker arm 11 is reset, the gear 141 can rotate. When the first rocker arm 11 is reset, the first gear portion 1322 rotates under the drive of the first ratchet portion 1321, thereby driving the cam member 12 to rotate through the gear 141 to change the initial position of the cam member 12 moving in the braking direction. By rotatably mounting the first gear portion 1322 on the first ratchet portion 1321, the first ratchet portion 1321 rotates first and the first gear portion 1322 rotates later, thereby providing a gap for the rotation of the first gear portion 1322, so that the cam member 12 rotates when the first rocker arm 11 is reset, and the initial position of the cam member 12 is adjusted, so that the adjustment accuracy can be improved.

[0041] In one embodiment, a first protrusion 1325 is provided on the first gear portion 1322, and a first groove 1326 is provided on the first ratchet portion 1321. The first protrusion 1325 can be slidably installed in the first groove 1326, so as to limit the rotation range of the first gear portion 1322 and improve the stability of the connection between the first gear portion 1322 and the first ratchet portion 1321.

[0042] In one embodiment, the ratchet member 132 further includes a fourth elastic member 1327 and a fifth elastic member 1328, wherein the fourth elastic member 1327 is installed between the first ratchet portion 1321 and the first gear portion 1322 to provide a restoring torque for the first gear portion 1322, and the fifth elastic member 1328 is installed between the first ratchet portion 1321 and the first rocker arm 11 to provide a restoring torque for the first ratchet portion 1321. Exemplarily, the fifth elastic member 1328 provides a clockwise rotation torque for the first ratchet portion 1321, and the first ratchet portion 1321 has a tendency to rotate clockwise under the action of the fifth elastic member 1328. When the brake shoe 20 is worn to a certain extent, the first rocker arm 11 rotates counterclockwise under the drive of the brake wire 30, and the escapement 131 moves to the preset area and contacts the blocking member 40 to push the escapement 131 to move, so that the escapement 131 releases the first ratchet part 1321, and the first ratchet part 1321 rotates clockwise under the action of the fifth elastic member 1328, and compresses the fourth elastic member 1327 at the same time, so that the fourth elastic member 1327 provides a clockwise rotation torque for the first gear part 1322. When the first rocker arm 11 is reset, the first gear part 1322 rotates clockwise under the action of the fourth elastic member 1327, thereby driving the gear 141 to rotate, and then driving the cam member 12 to rotate. By providing the fourth elastic member 1327 and the fifth elastic member 1328 , the rotation sensitivity and the rotation accuracy of the first ratchet portion 1321 and the first gear portion 1322 can be improved, and the vibration of the first ratchet portion 1321 and the first gear portion 1322 can be reduced.

[0043] The restoring force provided by the fifth elastic member 1328 is greater than the restoring force provided by the fourth elastic member 1327, and the restoring force provided by the fourth elastic member 1327 is greater than the elastic member providing the restoring force for the cam member 12. For example, the fifth elastic member 1328 is a spiral spring, which can be installed in the first rocker arm 11 and conflict with the first ratchet part 1321, thereby saving space. The fourth elastic member 1327 can be a torsion spring, which is installed on the first ratchet part 1321 and conflicts with the first gear part 1322. The elastic member providing the restoring force for the cam member 12 can be a tension spring installed between two shoes. In one embodiment, the brake adjustment assembly 10 also includes a third elastic member 16 that provides a restoring force for the first rocker arm 11, so that when the brake line 30 is released, the first rocker arm 11 can be provided with a power for resetting, thereby improving the sensitivity of the brake adjustment assembly 10. The third elastic member 16 can be arranged between the first rocker arm 11 and the housing, or between the ratchet member 132 and the housing.

[0044] In one embodiment, if Fig.10 and Fig.11As shown, the ratchet member 132 is mounted on the cam member 12. When the brake shoe 20 is not worn, the ratchet member 132 rotates synchronously with the first rocker arm 11 to drive the cam member 12 to rotate and achieve braking. When the brake shoe 20 is worn, the escapement 131 releases the ratchet member 132 to rotate the ratchet member 132, and the ratchet member 132 drives the cam member 12 to rotate, thereby adjusting the initial position of the cam member 12, and then adjusting the initial position of the brake shoe 20. When the brake shoe 20 is worn, the braking effect can also be guaranteed.

[0045] In one embodiment, the brake adjustment assembly 10 further includes a second pawl 17 mounted on the first rocker arm 11, and the second pawl 17 is used to limit the one-way rotation of the ratchet member 132. Specifically, an elastic member is mounted on the first rocker arm 11 to provide a restoring force for the second pawl 17, and the second pawl 17 is engaged with the ratchet member 132, and the ratchet member 132 pushes the second pawl 17 away and rotates. After the ratchet member 132 rotates, the second pawl 17 is re-engaged with the ratchet member 132 under the action of the elastic member, and the second pawl 17 and the escapement member 131 limit the rotation of the ratchet member 132 from two directions respectively, thereby improving the stability of the brake adjustment assembly 10.

[0046] In one embodiment, the brake adjustment assembly 10 further includes a driving member 18 movably connected to one end of the escapement 131. When the brake shoe 20 is worn to a certain extent, the first rocker arm 11 rotates counterclockwise under the drive of the brake wire 30, and the driving member 18 contacts the blocking member 40 to push the escapement 131 to move, so that the escapement 131 releases the ratchet member 132, thereby rotating the ratchet member 132 and driving the cam member 12 to rotate. After the brake wire 30 is released, the driving member 18 returns to a state of being movably connected to the escapement 131. By providing the driving member 18 for driving the escapement 131 to move, the stability of the escapement 131 can be improved.

[0047] In one embodiment, the ratchet member 132 includes a second ratchet portion 1323 and a second gear portion 1324 connected to each other, the escapement 131 is engaged with the second ratchet portion 1323, and the second pawl 17 is engaged with the second gear portion 1324, thereby improving the stability of the cam member 12 during rotation.

[0048] The present application also provides a brake device, which can be a drum brake or a follower brake. The brake device includes a brake shoe 20 and the above-mentioned brake adjustment assembly 10, and the cam member 12 is used to contact the brake shoe 20 to drive the brake shoe 20 to move in the braking direction. Exemplarily, the brake device includes two brake shoes 20, one end of the two brake shoes 20 is hinged, and the other ends of the two brake shoes 20 are in contact with the cam member 12. When the cam member 12 rotates, the two brake shoes 20 can be driven to move in the braking direction respectively at the same time. By providing the above-mentioned brake adjustment assembly 10 in the brake device, the initial position of the brake shoe 20 can be automatically adjusted when the brake shoe 20 is worn, thereby ensuring the braking effect of the brake device.

[0049] In one embodiment, the brake device also includes a housing 50, the brake shoe 20 is arranged in the housing 50, the first rocker arm 11 and the escapement mechanism 13 are arranged outside the housing 50, and the cam member 12 passes through the housing 50, one end of which is in contact with the brake shoe 20, and the other end is connected to the first rocker arm 11.

[0050] like Fig.12 As shown, the present application also provides a braking device, including a vehicle lock and the above-mentioned braking device, a housing 50 is provided with an installation groove 51 for installing the vehicle lock, and the vehicle lock can be a smart lock or a manual lock, which is used to lock the wheel assembly that conflicts with the brake shoe 20. The above-mentioned brake adjustment assembly 10 is provided in the braking device, and when the brake shoe 20 is worn, the initial position of the cam member 12 during braking can be adjusted during the braking process, and then the initial position of the brake shoe 20 during braking can be adjusted, so that the brake shoe 20 can be moved from the adjusted initial position to the braking direction during the next braking, and braking can be achieved without increasing the movement stroke of the brake shoe 20 and the first rocker arm 11, so that a better braking effect can be achieved even when the brake shoe 20 is worn.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A brake adjustment assembly, characterized in that: It includes a first rocker arm, a cam member and an escapement mechanism, wherein the cam member and the escapement mechanism are both mounted on the first rocker arm, and the escapement mechanism is used for moving synchronously with the first rocker arm to drive the cam member to move in the braking direction; the escapement mechanism includes an escapement member and a ratchet member, and the escapement member is engaged with the ratchet member. When the first rocker arm moves to a preset area, the escapement member is used for releasing the ratchet member to drive the cam member to rotate a preset angle, thereby adjusting the initial position of the cam member to move in the braking direction.

2. The brake adjustment assembly according to claim 1, characterized in that: The brake adjustment assembly also includes a second rocker arm, which is installed on the cam member and is used to move synchronously with the escapement mechanism and the first rocker arm to drive the cam member to move in the braking direction; the second rocker arm is used to drive the cam member to rotate a preset angle under the drive of the ratchet member.

3. The brake adjustment assembly according to claim 2, characterized in that: The second rocker arm includes a gear and a limiting member. The gear is mounted on the cam member and meshes with the ratchet member. The gear is used for unidirectional rotation under the action of the limiting member.

4. The brake adjustment assembly according to claim 3, characterized in that: The limiting member includes a first pawl installed on the first rocker arm, and a first elastic member that provides a restoring force for the first pawl.

5. The brake adjustment assembly according to claim 1, characterized in that: The ratchet member comprises a first ratchet part and a first gear part which are connected to each other, the escapement member is engaged with the first ratchet part, and the first gear part is used for driving the cam member to rotate.

6. The brake adjustment assembly according to claim 1, characterized in that: The first gear portion is rotatably mounted on the first ratchet portion, the escapement is used to release the first ratchet portion when the first rocker arm moves to a preset area, and the first gear portion is used to rotate under the drive of the first ratchet portion when the first rocker arm is reset to drive the cam portion to rotate a preset angle.

7. The brake adjustment assembly according to claim 6, characterized in that: The first gear portion is provided with a first protrusion, the first ratchet portion is provided with a first groove, and the first protrusion is slidably installed in the first groove.

8. The brake adjustment assembly according to claim 6, characterized in that: The ratchet member also includes a fourth elastic member and a fifth elastic member. The fourth elastic member is installed between the first ratchet part and the first gear part to provide a restoring torque for the first gear part. The fifth elastic member is installed between the first ratchet part and the first rocker arm to provide a restoring torque for the first ratchet part.

9. The brake adjustment assembly according to claim 1, characterized in that: The escapement comprises an escapement portion and an extension portion which are connected to each other. The extension portion is used to abut against a blocking member when the first rocker arm moves to a preset area, so as to drive the escapement portion to move, thereby releasing the ratchet member.

10. The brake adjustment assembly according to claim 1, characterized in that: The ratchet member is mounted on the cam member.

11. The brake adjustment assembly according to claim 10, characterized in that: The brake adjustment assembly also includes a second pawl mounted on the first rocker arm, and the second pawl is used to limit the one-way rotation of the ratchet member.

12. A brake device, characterized in that: It comprises a brake shoe and a brake adjustment assembly as claimed in any one of claims 1 to 11, wherein the cam member is used to abut against the brake shoe to drive the brake shoe to move in a braking direction.

13. A braking device, characterized in that: It comprises a vehicle lock and a brake device as claimed in claim 12.

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