Brake executing mechanism with manual adjusting function and manual adjusting mechanism

Abstract

The utility model provides a brake actuating mechanism with a manual adjusting function and a manual adjusting mechanism, which comprise a planet wheel assembly, a parking mechanism and the manual adjusting mechanism, the manual adjusting mechanism is provided with a manual adjusting gear fixing shaft and a manual adjusting gear, the manual adjusting gear is fixedly arranged on the manual adjusting gear fixing shaft, the manual adjusting gear is meshed with a secondary gear, and the secondary gear is meshed with the parking mechanism. The secondary gear is connected with a primary gear, and the primary gear is connected with a planet wheel assembly; the slipping torque between the manual adjustment gear fixing shaft and the manual adjustment gear is T1; the releasing torque of the parking mechanism is T2; the transmission ratio between the manual adjustment gear and the parking mechanism is N1, and the destructive moment of the manual adjustment gear is T3; and T2 < T1 * N1 < T3. With the help of the device, rapid disassembly can be realized in a mechanism clamping state. The gear is driven by the device to form reverse motion, so that the parking mechanism is driven to move, and the action that the braking mechanism relieves braking and clamping is achieved.

Description

Technical Field

[0001] The utility model relates to a vehicle brake, in particular to a technology for manually releasing a brake clamping state under a fault state. Background Art

[0002] Many existing automotive electronic mechanical brake actuators use motors as power, and use a reducer to reduce the speed of the motor and increase the torque. The rotational motion output by the reducer is then converted into linear motion (parking mechanism) through a power conversion component, and finally two brake pads are driven to clamp the brake disc to achieve vehicle braking.

[0003] In order to cooperate with the electrification, intelligence and lightweight of automobiles, the current wheel-side mechanical brake actuators are also developing towards highly integrated and lightweight. At present, the motor, reduction mechanism and actuator are generally integrated to greatly reduce their volume and space. In particular, in order to reduce the structure as much as possible and improve the integration, most of the gears are meshed and arranged compactly. Therefore, when a mechanical brake fails after clamping, there is a problem of how to quickly and non-destructively disassemble the brake, especially when the mechanism has torque-increasing force, and easy disassembly becomes a problem. Utility Model Content

[0004] In order to solve the problems existing in the above-mentioned technology, the utility model provides a brake actuator with a manual adjustment function, which solves the problems that multiple gears cannot be easily disassembled, the disassembly and assembly efficiency is low, and the disassembly and assembly process takes a long time, and can effectively solve the problems in the background technology.

[0005] The utility model first provides a brake actuator with a manual adjustment function, which includes a planetary gear assembly, a parking mechanism and a manual adjustment mechanism:

[0006] The planetary gear assembly receives the power from the motor;

[0007] A parking mechanism connected to the planetary gear assembly;

[0008] The manual adjustment mechanism comprises a manual adjustment gear fixing shaft and a manual adjustment gear, wherein the manual adjustment gear is fixedly arranged on the manual adjustment gear fixing shaft; the brake actuator further comprises a primary gear and a secondary gear, wherein the manual adjustment gear meshes with the secondary gear, the secondary gear is connected to the primary gear, and the primary gear is connected to the planetary gear assembly;

[0009] Among them, the slip torque between the manual gear fixed shaft and the manual gear is T1; the parking mechanism disengagement torque is T2; the transmission ratio between the manual gear and the parking mechanism is N1, and the breaking torque of the manual gear is T3; and T2<T1×N1<T3 is satisfied.

[0010] Preferably, the manual adjustment mechanism further includes a mounting seat and a pre-compression spring. The middle part of the mounting seat rotatably mounts the manual adjustment gear fixed shaft, and the mounting seat is fixedly connected to the housing;

[0011] The pre-compression spring is located between the mounting seat and the manual adjustment gear, and the pre-compression spring is sleeved and connected to the manual adjustment gear fixed shaft.

[0012] Preferably, there is a sealing ring between the connection of the mounting seat and the housing;

[0013] The center of the manual adjustment gear and the manual adjustment gear fixed shaft are press-fitted with interference.

[0014] Preferably, the diameter of the secondary gear is 2 times or more than 2 times the diameter of the manual adjustment gear.

[0015] Preferably, it further includes an idler gear, and the idler gear is respectively connected to the primary gear and the secondary gear.

[0016] The present utility model also provides a manual adjustment mechanism for an electromechanical brake, which includes a manual adjustment gear fixed shaft and a manual adjustment gear. The manual adjustment gear is fixedly arranged on the manual adjustment gear fixed shaft. The manual adjustment gear meshes with a secondary gear, and the secondary gear is connected to a primary gear. The primary gear is used to provide power to the parking mechanism;

[0017] Wherein, the slip torque between the manual adjustment gear fixed shaft and the manual adjustment gear is T1; the disengagement torque of the parking mechanism is T2; the transmission ratio between the manual adjustment gear and the parking mechanism is N1, and the breaking torque of the manual adjustment gear is T3; and T2 < T1×N1 < T3 is satisfied.

[0018] Preferably, the manual adjustment mechanism further includes a mounting seat and a pre-compression spring. The middle part of the mounting seat fixes the manual adjustment gear fixed shaft, and the mounting seat is fixedly connected to the housing;

[0019] The pre-compression spring is located between the mounting seat and the manual adjustment gear, and the pre-compression spring is sleeved and connected to the manual adjustment gear fixed shaft.

[0020] Preferably, there is a sealing ring between the connection of the mounting seat and the housing;

[0021] The center of the manual adjustment gear and the manual adjustment gear fixed shaft are press-fitted with interference.

[0022] The beneficial effects of the present utility model are as follows: With the help of this device, rapid disassembly can be achieved in the clamped state of the mechanism. By driving the gears of this device to form a reverse movement, it drives the parking mechanism to move, achieving the action of releasing the braking and clamping of the braking mechanism.

[0023] In a specific application, when it is necessary to manually release the brake of the parking mechanism, power is manually applied to the manual adjustment gear fixed shaft. The manual adjustment gear rotates, and then through the secondary gear and the primary gear, the movement is carried out, successively driving the parking mechanism to work, thereby releasing the brake. It should be noted that the force applied to the manual adjustment gear fixed shaft should be opposite to the force output by the primary gear during braking.

[0024] The parking mechanism belongs to the prior art, that is, by receiving power from the motor and the gear set, the rotational power is converted into a linear thrust, and the braking effect is formed through the linear thrust. This technology belongs to the prior art and will not be elaborated here. For example, the parking mechanism adopts the braking structure composed of a driving unit, an elastic member, and a transmission unit in Chinese Patent Application No. 2024104032880, and its power is also the axial movement formed by the motor driving the gear. When this braking structure fails, the present application realizes the brake release through the reverse driving operation of the driving gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0026] Figure 2 It is a schematic diagram in a partially sectional state of the present utility model.

[0027] Figure 3 It is a schematic diagram of the manual adjustment mechanism structure of the present utility model.

[0028] Description of the reference numerals:

[0029] 10 - planetary gear assembly; 11 - primary gear; 14 - intermediate gear; 20 - parking mechanism; 30 - manual adjustment mechanism; 31 - manual adjustment gear fixed shaft; 32 - manual adjustment gear; 34 - mounting seat; 35 - pre - compression spring; 36 - housing; 37 - sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Embodiment 1:

[0031] As Figures 1 to 3 shown, the present utility model first provides a brake actuator with a manual adjustment function, which includes a planetary gear assembly 10, a parking mechanism 20, and a manual adjustment mechanism 30:

[0032] The planetary gear assembly 10 receives the power of the motor;

[0033] The parking mechanism 20 is connected to the planetary gear assembly 10;

[0034] The manual adjustment mechanism 30 has a manually adjustable gear fixed shaft 31 and a manually adjustable gear 32, and the manually adjustable gear 32 is fixedly arranged on the manually adjustable gear fixed shaft 31; the brake actuator further includes a first-stage gear (11) and a second-stage gear (33), the manually adjustable gear 32 meshes with the second-stage gear 33, the second-stage gear 33 is connected to the first-stage gear 11, and the first-stage gear 11 is connected to the planetary gear assembly 10;

[0035] Among them, the slip torque between the manually adjustable gear fixed shaft 31 and the manually adjustable gear 32 is T1; the release torque of the parking mechanism 20 is T2; the transmission ratio between the manually adjustable gear 32 and the parking mechanism 20 is N1, and the breaking torque of the manually adjustable gear 32 is T3; and T2 < T1×N1 < T3 is satisfied.

[0036] In specific applications, when it is necessary to manually release the brake of the parking mechanism, power is manually applied to the manually adjustable gear fixed shaft 31, the manually adjustable gear 32 rotates, and then the movement is carried out through the second-stage gear 33 and the first-stage gear 11, that is, force transmission is generated on the second-stage gear 33 and the first-stage gear 11 in sequence, and the parking mechanism 20 is successively driven to work, thereby releasing the brake. It should be noted that the force applied to the manually adjustable gear fixed shaft 31 should be opposite to the force output during braking.

[0037] The condition of T2 < T1×N1 < T3 is satisfied, which avoids the problem of damage to the manually adjustable gear 32 and prolongs the overall service life.

[0038] In addition, during braking, the power output by the motor is transmitted to the planetary gear assembly 10, and then successively passes through the first-stage gear 11 and the second-stage gear 33 to achieve braking through the second-stage gear 33. During braking, the rotation of the second-stage gear 33 will drive the manually adjustable gear 32 to rotate idly, that is, the manually adjustable gear 32 rotates under the drive of the second-stage gear 33, but this rotation is an idle rotation and will not generate force transmission to the second-stage gear 33. The direction of the passive idle rotation of the manually adjustable gear 32 during braking is opposite to the rotation direction of the manually adjustable gear 32 under the action of the manually adjustable gear fixed shaft 31 when releasing the brake of the parking mechanism.

[0039] Among them, the process of the motor transmitting power to the planetary gear assembly 10 belongs to the prior art and will not be elaborated here. The planetary gear assembly 10 outputs power and brakes through the parking mechanism 20. The parking mechanism 20 is a structure of the prior art, and its function is to convert the rotational power into a linear thrust for braking, which will not be elaborated here.

[0040] Embodiment 2:

[0041] Based on Embodiment 1, preferably, the manual adjustment mechanism 30 further includes a mounting seat 34 and a pre-compression spring 35. The middle part of the mounting seat 34 rotatably mounts the manual adjustment gear fixed shaft 31, and the mounting seat 34 is fixedly connected to the housing 36; the mounting seat 34 can be fixedly mounted to the housing 36 by means of bolts.

[0042] The pre-compression spring 35 is located between the mounting seat 34 and the manual adjustment gear 32, and the pre-compression spring 35 is sleeved and connected to the manual adjustment gear fixed shaft 31. The pre-compression spring 35 has a certain pressure, which will form an axial pressure on the inner manual adjustment gear 32 to prevent accidental axial movement of the manual adjustment gear 32.

[0043] Preferably, there is a sealing ring 37 between the mounting seat 34 and the housing 36; this makes the pre-compression spring 35 and the manual adjustment gear 32 sealed and isolated from the outside.

[0044] The center of the manual adjustment gear 32 and the manual adjustment gear fixed shaft 31 are press-fitted with interference.

[0045] Preferably, the diameter of the secondary gear 33 is 2 times or more than 2 times the diameter of the manual adjustment gear 32. Through this setting, when rotating, it plays a role in increasing torque to smoothly release the brake.

[0046] Preferably, it further includes an idler wheel 14, and the idler wheel 14 is respectively connected to the primary gear 11 and the secondary gear 33.

[0047] Preferably, the inner end of the manual adjustment gear fixed shaft 31 is rotatably fitted on the mounting housing 36, and the outer end of the manual adjustment gear fixed shaft 31 has an exposed part, which is used to receive external force to release the brake in case of accidents such as failures.

[0048] The planetary gear assembly 10 includes an internal gear ring, planetary gears 12 and a sun gear. The sun gear meshes with a plurality of planetary gears, and the planetary gears mesh with the internal gear ring. The output shaft of the sun gear is connected to the parking mechanism 20.

[0049] Embodiment 3:

[0050] This embodiment also provides a manual adjustment mechanism for an electromechanical brake, which includes a manual adjustment gear fixed shaft 31 and a manual adjustment gear 32. The manual adjustment gear 32 is fixedly arranged on the manual adjustment gear fixed shaft 31. The manual adjustment gear 32 meshes with a secondary gear 33, and the secondary gear 33 is connected to a primary gear 11. The primary gear 11 is used to provide power to the parking mechanism 20;

[0051] Among them, the slip torque between the manually adjustable gear fixed shaft 31 and the manually adjustable gear 32 is T1; the disengaging torque of the parking mechanism 20 is T2; the transmission ratio between the manually adjustable gear 32 and the parking mechanism 20 is N1, and the breaking torque of the manually adjustable gear 32 is T3; and T2 < T1×N1 < T3 is satisfied.

[0052] Preferably, the manual adjustment mechanism 30 further includes a mounting seat 34 and a pre-compression spring 35. The middle part of the mounting seat 34 fixes the manually adjustable gear fixed shaft 31, and the mounting seat 34 is fixedly connected to the housing 36;

[0053] The pre-compression spring 35 is located between the mounting seat 34 and the manually adjustable gear 32, and the pre-compression spring 35 is sleeved and connected to the manually adjustable gear fixed shaft 31.

[0054] Preferably, a sealing ring 37 is provided in the middle of the connection between the mounting seat 34 and the housing 36;

[0055] The center of the manually adjustable gear 32 and the manually adjustable gear fixed shaft 31 are press-fitted with an interference fit.

Claims

1. A brake actuator with a manual adjustment function, characterized in that, Comprising: A planetary gear assembly (10) that receives the power of the motor; A parking mechanism (20) connected to the planetary gear assembly (10); A manual adjustment mechanism (30) having a manually adjustable gear fixed shaft (31) and a manually adjustable gear (32), the manually adjustable gear (32) being fixedly arranged on the manually adjustable gear fixed shaft (31); the brake actuator further includes a first-stage gear (11) and a second-stage gear (33), the manually adjustable gear (32) meshing with the second-stage gear (33), the second-stage gear (33) being connected to the first-stage gear (11), and the first-stage gear (11) being connected to the planetary gear assembly (10); Wherein, the slip torque between the manually adjustable gear fixed shaft (31) and the manually adjustable gear (32) is T1; the release torque of the parking mechanism (20) is T2; the transmission ratio between the manually adjustable gear (32) and the parking mechanism (20) is N1, and the breaking torque of the manually adjustable gear (32) is T3; and T2 < T1 × N1 < T3 is satisfied.

2. The brake actuator with manual adjustment function according to claim 1, characterized in that, The manual adjustment mechanism (30) further includes a mounting seat (34) and a pre-compression spring (35), the middle part of the mounting seat (34) rotatably mounting the manually adjustable gear fixed shaft (31), and the mounting seat (34) being fixedly connected to the housing (36); The pre-compression spring (35) is located between the mounting seat (34) and the manually adjustable gear (32), and the pre-compression spring (35) is sleeved and connected to the manually adjustable gear fixed shaft (31).

3. The brake actuator with a manual adjustment function according to claim 2, characterized in that, A sealing ring (37) is provided between the mounting seat (34) and the housing (36); The center of the manually adjustable gear (32) and the manually adjustable gear fixed shaft (31) are press-fitted with interference.

4. The brake actuator with a manual adjustment function according to claim 1, characterized in that, The diameter of the second-stage gear (33) is 2 times or more than 2 times the diameter of the manually adjustable gear.

5. The brake actuator with manual adjustment function according to claim 1, characterized in that, It further includes an idler gear (14), and the idler gear (14) is respectively connected to the first-stage gear (11) and the second-stage gear (33).

6. A manual adjustment mechanism, characterized in that, Comprising a manually adjustable gear fixed shaft (31) and a manually adjustable gear (32), the manually adjustable gear (32) being fixedly arranged on the manually adjustable gear fixed shaft (31), the manually adjustable gear (32) meshing with the second-stage gear (33), the second-stage gear (33) being connected to the first-stage gear (11), and the first-stage gear (11) being used to provide power to the parking mechanism (20); Wherein, the slip torque between the manually adjustable gear fixed shaft (31) and the manually adjustable gear (32) is T1; the release torque of the parking mechanism (20) is T2; the transmission ratio between the manually adjustable gear (32) and the parking mechanism (20) is N1, and the breaking torque of the manually adjustable gear (32) is T3; and T2 < T1 × N1 < T3 is satisfied.

7. The manual adjustment mechanism according to claim 6, characterized in that, The manual adjustment mechanism (30) further includes a mounting seat (34) and a pre-compression spring (35), the middle part of the mounting seat (34) fixing the manually adjustable gear fixed shaft (31), and the mounting seat (34) being fixedly connected to the housing (36); The pre-compression spring (35) is located between the mounting seat (34) and the manually adjustable gear (32), and the pre-compression spring (35) is sleeved and connected to the manually adjustable gear fixed shaft (31).

8. The manual adjustment mechanism according to claim 7, wherein, A sealing ring (37) is provided in the middle of the connection between the mounting base (34) and the housing (36); The center of the manually adjustable gear (32) and the manually adjustable gear fixed shaft (31) are press-fitted with interference fit.

Images