Brake adjusting assembly, brake device and brake device

Abstract

The utility model 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 utility model relates to vehicle brake technology field especially is involved in brake adjusting assembly, brake device and brake device. BACKGROUND

[0002] In the bicycle or electric bicycle, the braking effect of the vehicle has important influence on the vehicle performance. The vehicle brake is generally realized through the friction between the brake shoe and the wheel. For example, the user pulls the brake line to drive the brake shoe to adhere to the wheel, thereby braking the wheel. The brake shoe will be worn after being used for a period of time, which affects the braking effect of the vehicle. SUMMARY

[0003] The utility model discloses a brake adjusting assembly, brake device and brake device aim at solving the problem of poor braking effect after brake shoe wear in the prior art.

[0004] In a first aspect, the application provides a brake adjusting assembly, comprising a first rocker arm, a cam member and a escapement mechanism, the cam member and the escapement mechanism are both installed on the first rocker arm, the escapement mechanism is used for synchronous movement with the first rocker arm to drive the cam member to move to the braking direction, the escapement mechanism comprises an escapement member and a ratchet member, the escapement member is clamped on the ratchet member, when the first rocker arm moves to the 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 moving to the braking direction.

[0005] In an embodiment, the brake adjusting assembly further comprises a second rocker arm, the second rocker arm is installed on the cam member and is used for synchronous movement with the escapement mechanism and the first rocker arm to drive the cam member to move to the braking direction, the second rocker arm is used for driving the cam member to rotate a preset angle under the drive of the ratchet member.

[0006] In an embodiment, the second rocker arm comprises a gear and a limiting member, the gear is installed on the cam member and is engaged with the ratchet member, the gear is used for one-way rotation under the action of the limiting member.

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

[0008] In an embodiment, the ratchet member comprises a first ratchet part and a first gear part connected with each other, the escapement member is clamped on the first ratchet part, and the first gear part is used for driving the cam member to rotate.

[0009] In an embodiment, the first gear part is rotatably mounted on the first ratchet part, the escapement is configured to release the first ratchet part when the first rocker arm moves to a preset region, and the first gear part is configured to rotate under the drive of the first ratchet part when the first rocker arm resets, so as to drive the cam part to rotate by a preset angle.

[0010] In an embodiment, the first gear part is provided with a first protrusion, and the first ratchet part is provided with a first recess, and the first protrusion is slidably mounted in the first recess.

[0011] In an embodiment, the ratchet part further comprises a fourth elastic member and a fifth elastic member, the fourth elastic member is mounted between the first ratchet part and the first gear part, and is configured to provide a restoring torque for the first gear part, and the fifth elastic member is mounted between the first ratchet part and the first rocker arm, and is configured to provide a restoring torque for the first ratchet part.

[0012] In an embodiment, the escapement comprises an escapement part and an extension part connected with each other, and the extension part is configured to abut against the blocking part when the first rocker arm moves to a preset region, so as to drive the escapement part to move, thereby releasing the ratchet part.

[0013] In an embodiment, the ratchet part is mounted on the cam part.

[0014] In an embodiment, the brake adjusting assembly further comprises a second pawl mounted on the first rocker arm, and the second pawl is configured to limit the ratchet part to rotate in one direction.

[0015] In a second aspect, the application provides a brake device, comprising a brake shoe and the brake adjusting assembly of the first aspect, and the cam part is configured to abut against the brake shoe, so as to drive the brake shoe to move in a braking direction.

[0016] In a third aspect, the application provides a braking device, comprising a vehicle lock and the brake device of the second aspect.

[0017] The brake adjusting assembly has the beneficial effects that: the cam member and the escapement mechanism are installed 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 is increased when braking, so that the movement stroke of the cam member is increased, and then the first rocker arm can move to the preset area; when the first rocker arm moves to the preset area, the escapement releases the ratchet member to drive the cam member to rotate by a preset angle, so that the initial position of the cam member moving in the braking direction is adjusted, and then the initial position of the brake shoe moving in the braking direction is adjusted; when braking next time, the cam member and the brake shoe move from the new initial position in the braking direction, so that the wear of the brake shoe can be compensated, the movement stroke of the cam member and the brake shoe moving in the braking direction is not increased, and then the movement stroke of the first rocker arm when braking is not increased, and the braking effect of the vehicle is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description.

[0019] Figure 1 A schematic view of a brake adjusting assembly provided by an embodiment of the present application;

[0020] Figure 2 A schematic view of the brake adjusting assembly from another perspective provided by an embodiment of the present application;

[0021] Figure 3 A working principle diagram of the brake adjusting assembly provided by an embodiment of the present application;

[0022] Figure 4 A brake schematic view when the brake shoe of the brake adjusting assembly provided by an embodiment of the present application is not worn;

[0023] Figure 5 A brake schematic view when the brake shoe of the brake adjusting assembly provided by an embodiment of the present application is worn;

[0024] Figure 6 A schematic view of adjusting the position of the cam member of the brake adjusting assembly provided by an embodiment of the present application;

[0025] Figure 7 A schematic view of a brake adjusting assembly provided by another embodiment of the present application;

[0026] Figure 8 A connection relationship schematic view of the first ratchet gear part and the first gear part of the brake adjusting assembly provided by another embodiment of the present application;

[0027] Figure 9 The connecting relationship schematic view of the first ratchet wheel part and the first rocker arm of the brake adjusting assembly provided for another embodiment of the utility model is shown in the figure.

[0028] Figure 10 The schematic view of the brake adjusting assembly provided for another embodiment of the utility model is shown in the figure.

[0029] Figure 11 The schematic view of the brake adjusting assembly provided for another embodiment of the utility model is shown in the figure.

[0030] Figure 12 The schematic view of the brake adjusting assembly provided for another embodiment of the utility model is shown in the figure.

[0031] In the figure, various reference signs are as follows:

[0032] 10, brake adjusting assembly; 11, first rocker arm; 12, cam part; 13, escapement mechanism; 131, escapement part; 1311, escapement; 1312, extension; 1313, escapement fork; 132, ratchet part; 1321, first ratchet wheel part; 1322, first gear part; 1323, second ratchet wheel part; 1324, second gear part; 1325, first protrusion; 1326, first recess; 1327, fourth elastic part; 1328, fifth elastic part; 14, second rocker arm; 141, gear; 142, limiting part; 1421, first pawl; 1422, first elastic part; 15, second elastic part; 16, third elastic part; 17, second pawl; 18, driving part; 20, brake shoe block; 30, brake line; 40, blocking part; 50, housing; 51, mounting groove. DETAILED DESCRIPTION

[0033] Embodiments of the utility model are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as limiting the utility model.

[0034] Throughout the specification, reference 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 application. Therefore, the phrases "in one embodiment" or "in some embodiments" appearing in various places throughout the specification are not all referring to the same embodiment. Furthermore, particular features, structures, or characteristics can be combined in any suitable way in one or more embodiments.

[0035] In the description of the utility model, it is understood that the directions or position relations of the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the directions or position relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0036] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0037] In the utility model, unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] Please refer to Figures 1 to 11 The brake adjusting assembly in the embodiment of the utility model will be described.

[0039] As shown in Figures 1 to 3 The brake adjusting assembly 10 comprises a first rocker arm 11, a cam member 12 and a escapement 13, the cam member 12 and the escapement 13 are both mounted on the first rocker arm 11, the escapement 13 is used for synchronous movement with the first rocker arm 11 to drive the cam member 12 to move to the brake direction; the escapement 13 comprises an escapement member 131 and a ratchet member 132, the escapement member 131 is clamped on the ratchet member 132, when the first rocker arm 11 moves to the preset area, the escapement member 131 is used for releasing 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 moving to the brake direction.

[0040] Specifically, the first rocker arm 11 moves under the drive of the external force, the escapement 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 to the braking direction. The cam member 12 abuts against the brake shoe 20, thereby driving the brake shoe 20 to move to the braking direction (i.e. the direction close to the wheel). When the brake shoe 20 abuts against the wheel, the first rocker arm 11 cannot continue to move, and the cam member 12 stops moving, thereby realizing the braking. The brake shoe 20 is worn 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 the external force, and moves a larger distance to make the brake shoe 20 abut against the wheel. The more worn the brake shoe 20 is, the larger the gap between the brake shoe 20 and the wheel is, and the longer the movement stroke of the first rocker arm 11 is when braking. After the brake shoe 20 is worn to a certain extent, the first rocker arm 11 can move to the preset area under the action of the external force. When the first rocker arm 11 moves to the preset area, the escapement 131 releases the ratchet member 132, so that the ratchet member 132 rotates, thereby driving the cam member 12 to rotate a preset angle relative to the first rocker arm 11, and the cam member 12 further drives the brake shoe 20 to move to the 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 when braking next time, and the position of the brake shoe 20 after moving is the initial position of the brake shoe 20 when braking next time. When braking next time, the distance between the worn brake shoe 20 and the wheel is reduced, and the initial position of the first rocker arm 11 is 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 the position abutting against the wheel, thereby realizing the braking. Therefore, the braking effect is not affected even if the brake shoe 20 is worn.

[0041] It can be understood that the movement of the cam member 12 to the braking direction can refer to the rotation of the cam member 12 around the rotation shaft to the preset direction to push the brake shoe 20 to the braking direction, or can refer to the sliding of the cam member 12 along a straight line to the preset direction to push the brake shoe 20 to the braking direction.

[0042] In an embodiment, the brake adjusting assembly 10 further comprises a second rocker arm 14, which is installed on the cam member 12 and is used to move synchronously with the escapement 13 and the first rocker arm 11 to drive the cam member 12 to move to the brake direction; the second rocker arm 14 is used to drive the cam member 12 to rotate a preset angle under the drive of the ratchet member 132. Specifically, the second rocker arm 14 is installed on the first rocker arm 11, the first rocker arm 11 is rotatably installed on the cam member 12, and the second rocker arm 14 is fixedly installed on the cam member 12. Therefore, the cam member 12 can rotate synchronously with the first rocker arm 11 or relative to the first rocker arm 11 under the action of the second rocker arm 14. When the first rocker arm 11 moves under the drive of an external force, the second rocker arm 14 moves synchronously with the escapement 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 a preset area, the escapement 131 releases the ratchet member 132, so that the ratchet member 132 rotates, and the second rocker arm 14 rotates relative to the first rocker arm 11 under the drive of the ratchet member 132, thereby driving the cam member 12 to rotate a preset angle relative to the first rocker arm 11 to change the initial position of the cam member 12 moving to the brake 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 member 132, the cam member 12 can be adjusted to an appropriate angle after the brake shoe 20 is worn, thereby increasing the adjustment times of the cam member 12 and prolonging the service life of the brake adjusting assembly 10.

[0043] In an embodiment, the second rocker arm 14 comprises a gear 141 and a limiting member 142, the gear 141 is fixedly installed on the cam member 12 and is engaged with the ratchet member 132, and the gear 141 is used to rotate in one direction under the action of the limiting member 142. Specifically, when the ratchet member 132 rotates, the gear 141 rotates, and 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 limiting member 142 and the ratchet member 132, thereby moving synchronously with the first rocker arm 11.

[0044] In an embodiment, the limiting member 142 comprises a first pawl 1421 installed 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 on the gear 141, the ratchet member 132 provides power for the gear 141 when rotating, and the gear 141 pushes away 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 engaged on the gear 141 again to limit the gear 141 from rotating in the opposite direction.

[0045] In another embodiment, the second rocker arm 14 can also be a one-way bearing.

[0046] In an embodiment, the escapement 131 comprises an escapement portion 1311 and an extension portion 1312 connected to each other, the escapement portion 1311 comprises two escapement forks 1313 engaged with the ratchet 132, and the extension portion 1312 is used to abut against the blocking member when the first rocker arm 11 moves to a preset region, so as to drive the escapement portion 1311 to move, thereby releasing the ratchet 132, so that the automatic adjustment of the cam 12 can be realized, and the cost of the brake adjustment assembly 10 is reduced. The blocking member can be arranged on the housing where the brake adjustment assembly 10 is located, or can be arranged on the bicycle or the bicycle lock. The brake adjustment assembly 10 further comprises a second elastic member 15 for providing a restoring force to the escapement 131, so that the escapement 131 can be reset after the adjustment of the cam 12, for the next adjustment of the cam 12.

[0047] As shown in Figure 4 , the escapement 13 and the gear 141 are 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 to rotate counterclockwise. One of the escapement forks 1313 is engaged with the ratchet 132, so that the escapement 13 and the first pawl 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 in turn drives the cam 12 to rotate, so as to drive the brake shoe 20 to move in the braking direction, thereby realizing the brake. At this time, the escapement 131 does not contact the blocking member 40. As shown in Figure 1 , when the brake line 30 is released, the gear 141 rotates clockwise with the first rocker arm 11, drives the cam 12 to rotate, and in turn resets the brake shoe 20.

[0048] As shown in Figure 5 , 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 abuts against the blocking member 40 to push the escapement 131 to move, so that one of the escapement forks 1313 is disengaged from the ratchet 132, and the other escapement fork 1313 is engaged with the ratchet 132. As shown in Figure 6When the brake line 30 is released, the escapement 131 is reset under the action of the second elastic member 15, so that the ratchet member 132 rotates by an angle of one tooth in the clockwise direction, and one of the escapement forks 1313 is engaged with the ratchet member 132 again. When the ratchet member 132 rotates in the clockwise direction, the gear 141 is driven to rotate, and the gear 141 pushes away the first pawl 1421 and rotates in the counterclockwise direction. After the gear 141 rotates by a certain angle, the first pawl 1421 is engaged with the gear 141 again to limit the rotation of the gear 141 in the clockwise direction. The rotation of the gear 141 drives the cam member 12 to rotate, so as to adjust the initial position of the cam member 12, and further adjust the initial position of the brake shoe 20 when braking.

[0049] In another embodiment, the brake adjusting assembly 10 further comprises an electric motor for driving the escapement 131 to move. Exemplarily, when the first rocker arm 11 moves to the preset area, the electric motor drives the escapement 131 to move, so that the escapement 131 releases the ratchet member 132 to drive the cam member 12 to rotate.

[0050] In an embodiment, the ratchet member 132 comprises a first ratchet part 1321 and a first gear part 1322 connected with each other, the escapement 131 is engaged with the first ratchet part 1321, and the first gear part 1322 is used to drive the cam member 12 to rotate. Exemplarily, the first gear part 1322 is engaged with the gear 141, the escapement 131 releases the first ratchet part 1321 to rotate, so as to drive the first gear part 1322 to rotate, and the first gear part 1322 drives the cam member 12 to rotate through the gear 141. By arranging the first ratchet part 1321 and the first gear part 1322 connected with each other, the ratchet member 132 can better adapt to the escapement 131 and the gear 141, so as to improve the adjustment accuracy of the cam member 12.

[0051] In the embodiment, the first ratchet part 1321 and the first gear part 1322 can be arranged in an overlapped manner, the distance between the first ratchet part 1321 and the plane where the first rocker arm 11 is located is a first distance, the distance between the first gear part 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 part 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 engaged with the first gear part 1322. The first ratchet part 1321 and the first gear part 1322 can be fixedly connected or integrally formed, and the first ratchet part 1321 and the first gear part 1322 can also be movably connected.

[0052] In an embodiment, as shown in FIG. 1, the first ratchet part 1321 and the first gear part 1322 are integrally formed. Figures 7 to 9As shown, the first gear part 1322 is rotatably mounted on the first ratchet part 1321, the escapement 131 is used to release the first ratchet part 1321 when the first rocker arm 11 moves to a preset area, and the first gear part 1322 is used to rotate under the drive of the first ratchet part 1321 when the first rocker arm 11 resets, so as to drive the cam piece 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, the escapement 131 moves to the preset area and is in contact with the blocking piece, so as to push the escapement 131 to move and make the escapement 131 release the first ratchet part 1321, the first ratchet part 1321 rotates clockwise, and the first gear part 1322 cannot rotate under the action of the gear 141. When the brake line 30 is loosened, the first rocker arm 11 rotates clockwise until the first rocker arm 11 resets. At this time, the gear 141 can rotate. When the first rocker arm 11 resets, the first gear part 1322 rotates under the drive of the first ratchet part 1321, so as to drive the cam piece 12 to rotate through the gear 141, so as to change the initial position of the cam piece 12 moving to the braking direction. By rotatably mounting the first gear part 1322 on the first ratchet part 1321, the first ratchet part 1321 rotates first, and the first gear part 1322 rotates later, so as to provide a gap for the rotation of the first gear part 1322, make the cam piece 12 rotate under the condition that the first rocker arm 11 resets, realize the adjustment of the initial position of the cam piece 12, and improve the adjustment accuracy.

[0053] In an embodiment, the first gear part 1322 is provided with a first protrusion 1325, the first ratchet part 1321 is provided with a first groove 1326, and the first protrusion 1325 is slidably mounted in the first groove 1326, so as to limit the rotation range of the first gear part 1322 and improve the stability of the connection between the first gear part 1322 and the first ratchet part 1321.

[0054] In an embodiment, the ratchet member 132 further comprises a fourth elastic member 1327 and a fifth elastic member 1328, the fourth elastic member 1327 is installed between the first ratchet part 1321 and the first gear part 1322 for providing a restoring torque to the first gear part 1322, and the fifth elastic member 1328 is installed between the first ratchet part 1321 and the first rocker arm 11 for providing a restoring torque to the first ratchet part 1321. Exemplarily, the fifth elastic member 1328 provides a clockwise rotating torque to the first ratchet part 1321, and the first ratchet part 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 cable 30, and the escapement member 131 is in contact with the blocking member 40 when it moves to the preset area, so as to push the escapement member 131 to move, and the escapement member 131 releases the first ratchet part 1321, the first ratchet part 1321 rotates clockwise under the action of the fifth elastic member 1328, and at the same time, the fourth elastic member 1327 is compressed, so as to provide a clockwise rotating torque to 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, so as to drive the gear 141 to rotate, and further drive the cam member 12 to rotate. By setting the fourth elastic member 1327 and the fifth elastic member 1328, the rotating sensitivity and accuracy of the first ratchet part 1321 and the first gear part 1322 can be improved, and the vibration of the first ratchet part 1321 and the first gear part 1322 can be reduced.

[0055] In an embodiment, 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 restoring force provided by the elastic member for the cam member 12. For example, the fifth elastic member 1328 is a volute spring, which can be installed in the first rocker arm 11 and in contact with the first ratchet part 1321, so as to save space. The fourth elastic member 1327 can be a torsion spring, which is installed on the first ratchet part 1321 and in contact with the first gear part 1322. The elastic member for the cam member 12 can be a tension spring installed between two shoes. In an embodiment, the brake adjusting assembly 10 further comprises a third elastic member 16 for providing a restoring force to the first rocker arm 11, so as to provide power for resetting the first rocker arm 11 when the brake cable 30 is loosened, and improve the sensitivity of the brake adjusting assembly 10. The third elastic member 16 can be arranged between the first rocker arm 11 and the housing, or arranged between the ratchet member 132 and the housing.

[0056] In an embodiment, as shown in FIG. 1, the brake adjusting assembly 10 further comprises a blocking member 40, which is arranged between the first rocker arm 11 and the escapement member 131, and in contact with the escapement member 131 when the first rocker arm 11 rotates counterclockwise under the drive of the brake cable 30. Figure 10 and Figure 11As shown, the ratchet member 132 is installed on the cam member 12, and in the case that 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, thereby realizing braking. In the case that the brake shoe 20 is worn, the escapement 131 releases the ratchet member 132 to rotate, and the ratchet member 132 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, and in the case that the brake shoe 20 is worn, the braking effect can also be ensured.

[0057] In an embodiment, the brake adjusting assembly 10 further comprises a second pawl 17 installed 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, the first rocker arm 11 is provided with an elastic member that provides a restoring force for the second pawl 17, the second pawl 17 is clamped on the ratchet member 132, the ratchet member 132 pushes away the second pawl 17 and rotates, and after the ratchet member 132 rotates, the second pawl 17 is clamped on the ratchet member 132 again under the action of the elastic member. The second pawl 17 and the escapement 131 limit the rotation of the ratchet member 132 from two directions respectively, thereby improving the stability of the brake adjusting assembly 10.

[0058] In an embodiment, the brake adjusting assembly 10 further comprises 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 driving of the brake line 30, the driving member 18 is in contact with the blocking member 40 to push the escapement 131 to move, so that the escapement 131 releases the ratchet member 132, thereby driving the ratchet member 132 to rotate, and further driving the cam member 12 to rotate. After the brake line 30 is loosened, the driving member 18 returns to the 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.

[0059] In an embodiment, the ratchet member 132 comprises a second ratchet portion 1323 and a second gear portion 1324 connected to each other, the escapement 131 is clamped on the second ratchet portion 1323, and the second pawl 17 is clamped on the second gear portion 1324, thereby improving the stability during the rotation of the cam member 12.

[0060] The application further provides a brake device, which can be a drum brake or a follow-up brake. The brake device comprises brake shoes 20 and the brake adjusting assembly 10 described above, and the cam member 12 is used to abut against the brake shoes 20 to drive the brake shoes 20 to move in the braking direction. Exemplarily, the brake device comprises two brake shoes 20, one end of each of the two brake shoes 20 is hinged, and the other end of each of the two brake shoes 20 abuts against the cam member 12. The cam member 12 can simultaneously drive the two brake shoes 20 to move in the braking direction respectively under the condition of rotation. By arranging the brake adjusting assembly 10 described above in the brake device, the initial position of the brake shoes 20 can be automatically adjusted under the condition of wear of the brake shoes 20, and the braking effect of the brake device is ensured.

[0061] In an embodiment, the brake device further comprises a housing 50, the brake shoes 20 are 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 penetrates through the housing 50, one end of the cam member 12 abuts against the brake shoes 20, and the other end of the cam member 12 is connected with the first rocker arm 11.

[0062] As shown in the accompanying drawings, Figure 12 The application further provides a brake device, which comprises a lock and the brake device described above. The housing 50 is provided with a mounting groove 51 for mounting the lock. The lock can be an intelligent lock or a manual lock, and is used to lock a wheel assembly abutting against the brake shoes 20. By arranging the brake adjusting assembly 10 described above in the brake device, the initial position of the cam member 12 during braking can be adjusted in the braking process under the condition of wear of the brake shoes 20, and the initial position of the brake shoes 20 during braking is further adjusted, so that the brake shoes 20 can move from the adjusted initial position in the braking direction during the next braking, and the braking can be realized without increasing the movement stroke of the brake shoes 20 and the first rocker arm 11, so that the brake device can have a better braking effect under the condition of wear of the brake shoes 20.

[0063] The above merely describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A brake adjustment assembly, characterized by, The brake adjusting assembly comprises a first rocker arm, a cam member and an escapement mechanism, the cam member and the escapement mechanism are both mounted on the first rocker arm, the escapement mechanism is used for moving synchronously with the first rocker arm to drive the cam member to move in a braking direction; the escapement mechanism comprises an escapement member and a ratchet member, the escapement member is engaged on 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, so as to adjust an initial position of the cam member moving in the braking direction.

2. The brake adjustment assembly of claim 1, wherein, The brake adjusting assembly further comprises a second rocker arm, the second rocker arm is mounted on the cam member and is used for moving 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 for driving the cam member to rotate a preset angle under the driving of the ratchet member.

3. The brake adjustment assembly of claim 2, wherein, The second rocker arm comprises a gear and a limiting member, the gear is mounted on the cam member and is engaged with the ratchet member, the gear is used for rotating in one direction under the action of the limiting member.

4. The brake adjustment assembly of claim 3, wherein, The limiting member comprises a first pawl mounted on the first rocker arm and a first elastic member providing a restoring force for the first pawl.

5. The brake adjustment assembly of claim 1, wherein, The ratchet member comprises a first ratchet part and a first gear part connected with each other, the escapement member is engaged on the first ratchet part, and the first gear part is used for driving the cam member to rotate.

6. The brake adjustment assembly of claim 5, wherein, The first gear part is rotatably mounted on the first ratchet part, the escapement member is used for releasing the first ratchet part when the first rocker arm moves to a preset area, and the first gear part is used for rotating under the driving of the first ratchet part when the first rocker arm resets to drive the cam member to rotate a preset angle.

7. The brake adjustment assembly of claim 6, wherein, A first protrusion is arranged on the first gear part, a first groove is arranged on the first ratchet part, and the first protrusion is slidably mounted in the first groove.

8. The brake adjustment assembly of claim 6, wherein, The ratchet member further comprises a fourth elastic member and a fifth elastic member, the fourth elastic member is mounted between the first ratchet part and the first gear part and is used for providing a restoring torque for the first gear part, and the fifth elastic member is mounted between the first ratchet part and the first rocker arm and is used for providing a restoring torque for the first ratchet part.

9. The brake adjustment assembly of claim 1, wherein, The escapement member comprises an escapement part and an extension part connected with each other, the extension part is used for abutting against a blocking member when the first rocker arm moves to a preset area to drive the escapement part to move, thereby releasing the ratchet member.

10. The brake adjustment assembly of claim 1, wherein, The ratchet member is mounted on the cam member.

11. The brake adjustment assembly of claim 10, wherein, The brake adjusting assembly further comprises a second pawl mounted on the first rocker arm, and the second pawl is used for limiting the ratchet member to rotate in one direction.

12. A brake device characterized by comprising: The brake device comprises brake shoes and the brake adjusting assembly according to any one of claims 1 to 11, and the cam member is used for abutting against the brake shoes to drive the brake shoes to move in a braking direction.

13. A brake device characterized by comprising: The brake device comprises a lock and the brake device according to claim 12.

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