Brake system and vehicle

Abstract

The utility model discloses a braking system and a vehicle. The braking system comprises an actuator, a main body and a brake. The main body comprises a ball screw and a piston, the piston is arranged on the partial peripheral face of the ball screw in a sleeving mode, and in the first direction, one end of the ball screw is connected with the actuator. And the brake is connected with one end, far away from the actuator, of the piston in the first direction. The main body is configured to drive the piston to push the brake in the first direction when the ball screw receives torque provided by the actuator, and the first direction is parallel to the axis direction of the piston and the axis direction of the ball screw. The actuator provides torque for the ball screw, the piston converts the torque received by the ball screw into thrust pushing the brake in the first direction, and therefore braking is achieved, the structure of a braking system is simplified, the fault rate is reduced, and maintenance is convenient.

Description

Technical Field

[0001] The present application relates to the field of braking technology, and in particular to a braking system and a vehicle. Background Art

[0002] Vehicles are important means of transportation in people's lives, among which the braking system is an important component that affects their safety.

[0003] In the electronic mechanical braking system, electrical energy is the energy source, the brake pads are driven by the motor, and energy is transmitted through wires, and data transmits signals. There is no need for brake fluid to act as a braking medium, and braking is achieved directly through the electronic mechanical brake.

[0004] CN212950557U discloses a dual electronic mechanical coupling safety brake system, which belongs to the field of electronic mechanical brake technology; the brake system includes a main EMB and a secondary EMB, the gear reduction mechanisms of the main EMB and the secondary EMB share a ball screw pair, a secondary shaft and a caliper brake, the main EMB motor and the secondary EMB motor are respectively controlled by a main EMB control module and a secondary EMB control module, the main EMB control module and the secondary EMB control module receive different working condition signals of the working mode recognition module in the electronic control unit, control the start and stop of the main and secondary EMB motors, and realize the control of the main EMB and the secondary EMB. The utility model does not require hydraulic system components, only relies on electronic mechanical braking, and when the main EMB fails, the secondary EMB continues to complete the work, with higher integration and stronger reliability.

[0005] However, the above solution has a relatively complex structure, and has a high failure rate and maintenance cost. Therefore, providing an electronic brake with a compact and simple structure is one of the problems that urgently need to be solved. Summary of the invention

[0006] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a braking system and a vehicle, wherein the braking system has a compact and simple structure, reduces the failure rate, and is easy to maintain.

[0007] A braking system according to an embodiment of the first aspect of the present application includes an actuator, a main body and a brake. The main body includes a ball screw and a piston, and the piston is sleeved on a portion of the outer circumference of the ball screw. In a first direction, one end of the ball screw is connected to the actuator. The brake is connected to an end of the piston away from the actuator in the first direction. Wherein, the main body is configured so that when the ball screw receives the torque provided by the actuator, the piston is driven to push the brake along the first direction, and the first direction is parallel to the axial direction of the piston and the axial direction of the ball screw.

[0008] The braking system according to the embodiment of the present application has at least the following beneficial effects: the actuator provides torque to the ball screw, and the piston converts the torque received by the ball screw into a thrust that pushes the brake in a first direction, thereby achieving braking, simplifying the structure of the braking system, thereby reducing the failure rate and facilitating maintenance.

[0009] In some embodiments, the main body further includes a screw key, the ball screw includes a first end, the first end extends beyond the piston in the first direction, the first end is connected to the actuator, and the screw key is arranged at the first end.

[0010] In some embodiments, the main body further includes a bearing, and the bearing is sleeved on the first end.

[0011] In some embodiments, the main body further includes a force sensor, which is sleeved on the first end and disposed between the bearing and the actuator in the first direction.

[0012] In some embodiments, the main body further includes a shell, the shell is movably connected to the piston, and the shell is sleeved on the outer circumferential surface of the piston.

[0013] In some embodiments, the main body further includes a stopper, one end of which is connected to the piston, and the other end of which is connected to the outer shell, and in the circumferential direction of the piston, the stopper abuts against the outer shell.

[0014] In some embodiments, there are multiple detents, and the multiple detents are arranged at intervals along the circumference of the piston.

[0015] In some embodiments, the main body further includes a dust cover, and in the first direction, the dust cover is disposed at an end of the piston away from the actuator, and the dust cover is disposed between the piston and the housing.

[0016] In some embodiments, the main body further includes a piston O-ring, the piston O-ring is sleeved on the piston, and the piston O-ring is disposed between the piston and the housing.

[0017] A vehicle according to an embodiment of the second aspect of the present application comprises the braking system described in any of the above embodiments.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present application is further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 This is a schematic diagram of the structure of the braking system of an embodiment of the present application;

[0021] Figure 2 An exploded diagram of a braking system according to an embodiment of the present application;

[0022] Figure 3 A schematic diagram of the internal structure of a braking system according to an embodiment of the present application;

[0023] Figure 4 This is a schematic diagram of the internal structure of the braking system of an embodiment of the present application from another perspective.

[0024] Reference numerals: brake system 1;

[0025] Actuator 10;

[0026] Main body 20, ball screw 21, screw flat key 211, first end 212, bearing 213, screw gasket 214, bearing gasket 215, screw retaining spring 216, piston 22, piston O-ring 221, force sensor 23, housing 24, housing O-ring 241, housing retaining spring 242, stopper 25, dust cover 26, bushing 27;

[0027] Brake 30;

[0028] The first direction X is the circumferential direction Y of the piston. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below, and examples of the embodiments 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 only used to explain the present application, and cannot be understood as limiting the present application.

[0030] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] In the description of this application, "several" means more than one, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0033] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0034] Please refer to Figures 1 to 4 , Figure 1 is a schematic diagram of the structure of the braking system of an embodiment of the present application, Figure 2 is an exploded diagram of a braking system according to an embodiment of the present application, Figure 3 is a schematic diagram of the internal structure of the braking system of an embodiment of the present application, Figure 4 This is a schematic diagram of the internal structure of the braking system of the embodiment of the present application from another perspective. Figure 3 The actuator is hidden in the .

[0035] The embodiment of the present application provides a braking system 1. The braking system 1 includes an actuator 10, a main body 20 and a brake 30. The main body 20 includes a ball screw 21 and a piston 22, wherein the piston 22 is sleeved on a portion of the outer circumference of the ball screw 21, and one end of the ball screw 21 is connected to the actuator 10 in a first direction X. The brake 30 is connected to an end of the piston 22 away from the actuator 10 in the first direction X. The main body 20 is configured such that when the ball screw 21 receives the torque provided by the actuator 10, the piston 22 is driven to push the brake 30 along the first direction X, and the first direction X is parallel to the axial direction of the piston 22 and the axial direction of the ball screw 21.

[0036] In some embodiments, the brake system 1 may be an electromechanical brake system.

[0037] In some embodiments, the actuator 10 may be a motor, and the actuator 10 is connected to external wires to provide electrical energy to the actuator 10 .

[0038] In some embodiments, the rotating shaft of the actuator 10 may be connected to the ball screw 21 to provide torque to the ball screw 21 .

[0039] In some embodiments, the ball screw 21 and the piston 22 may both extend in a first direction X. The first direction may be represented by the direction indicated by the letter X in the figure, and the axis of the ball screw 21 may coincide with the axis of the piston 22. The first direction X may be parallel to the axis direction of the ball screw 21. The first direction X may be parallel to the axis direction of the piston 22.

[0040] In some embodiments, the piston 22 is sleeved on a portion of the outer circumference of the ball screw 21 , that is, a portion of the ball screw 21 is located inside the piston 22 , and a portion of the ball screw 21 is located outside the piston 22 .

[0041] In some embodiments, in the first direction X, the actuator 10 and the brake 30 may be respectively located at two ends of the body 20 . The actuator 10 is connected to one end of the ball screw 21 , and the brake 30 is connected to one end of the piston 22 .

[0042] In some embodiments, the ball screw 21 is threadedly connected and fixed to the piston 22 .

[0043] In some embodiments, the ball screw 21 is divided into a first portion of an inner ring and a second portion of an outer ring, the first portion and the second portion are engaged by threads, and a raceway is formed between the first portion and the second portion, and the balls are arranged in the raceway. The first portion and the second portion may both extend along the first direction X.

[0044] When the actuator 10 provides torque to the ball screw 21, the actuator 10 transmits the rotational motion to the ball screw 21, and the balls roll in the raceway, converting the rotational motion into linear motion, that is, the first part starts to rotate. Since the threads of the first part and the second part are engaged with each other, the second part cannot rotate freely. When the first part rotates, the second part can only move along the first direction X. The balls are located in the raceway between the first part and the second part. When the first part rotates, the balls roll forward due to their own rolling, pushing the second part to move along the first direction X. The balls always keep in contact with the first part and the second part during the rolling process, so the input rotational motion is converted into linear motion.

[0045] The first part may be a rotating shaft, and the second part may be a rotating shaft sleeve.

[0046] The piston 22 is sleeved on the rotating shaft sleeve. When the rotating shaft sleeve moves along the first direction X, the piston 22 is driven to move along the first direction X.

[0047] In some embodiments, the piston 22 moves away from the actuator 10 along the first direction X, thereby pushing the brake 30 to move away from the actuator 10 along the first direction X, thereby achieving braking.

[0048] In some embodiments, the brake 30 is simply shown in the figure. The brake 30 may also include a mounting bracket for easy fixation.

[0049] The braking system 1 according to the embodiment of the present application has at least the following beneficial effects: the actuator 10 provides torque to the ball screw 21, and the piston 22 converts the torque received by the ball screw 21 into a thrust that pushes the brake 30 along the first direction X, thereby achieving braking, simplifying the structure of the braking system 1, thereby reducing the failure rate and facilitating maintenance.

[0050] In some embodiments, the main body 20 further includes a screw key 211 , the ball screw 21 includes a first end 212 , in the first direction X, the first end 212 extends beyond the piston 22 , the first end 212 is connected to the actuator 10 , and the screw key 211 is disposed at the first end 212 .

[0051] In some embodiments, the ball screw 21 may include a first end 212, wherein the first end 212 extends beyond the piston 22, that is, the piston 22 is sleeved on a portion of the ball screw 21, while a portion of the first end 212 is not sleeved by the piston 22, thereby exposing the first end 212 for easy connection with the actuator 10.

[0052] In some embodiments, the outer circumferential surface of the first end 212 may be disposed in a mounting groove, a portion of the lead screw flat key 211 is disposed in the mounting groove, and another portion is exposed from the mounting groove.

[0053] In some embodiments, the screw flat key 211 may be interference fit with the mounting slot.

[0054] By providing the screw flat key 211, a more accurate installation position and direction are provided, thereby improving the transmission accuracy and positioning accuracy of the ball screw 21 and the actuator 10. At the same time, when the ball screw 21 is working, the risk of offset or axial shaking is reduced, thereby improving the service life and performance stability of the brake system 1.

[0055] In some embodiments, the main body 20 further includes a bearing 213, and the bearing 213 is sleeved on the first end 212. The inner ring of the bearing 213 can be connected to the first part of the ball screw 21, that is, the inner ring of the bearing 213 is sleeved on the first part, and the second part of the ball screw 21 can be sleeved on the outer ring part of the bearing 213.

[0056] In some embodiments, the bearing 213 may be clearance-fitted with the ball screw 21 in the radial direction.

[0057] By providing the bearing 213, the friction force is reduced and the transmission efficiency of the ball screw 21 from rotation to linear motion is improved.

[0058] In some embodiments, the main body 20 further includes a force sensor 23 , which is sleeved on the first end 212 and disposed in the first direction X between the bearing 213 and the actuator 10 .

[0059] In some embodiments, the force sensor 23 and the ball screw 21 are clearance-matched in the radial direction.

[0060] In some embodiments, in the first direction X, one end of the force sensor 23 may be in contact with the bearing 213 , and the other end of the force sensor 23 may be in contact with the housing 24 in the first direction X.

[0061] In some embodiments, in the first direction X, one end of the force sensor 23 may be in contact with the bearing 213 , and the other end of the force sensor 23 may be in contact with the piston 22 in the first direction X.

[0062] By providing a force sensor 23 to detect the torque transmitted to the ball screw 21 by the actuator 10, it is convenient to detect the working state of the brake system 1, so as to reduce the risk of failure of the brake system 1 and thus affecting the safety.

[0063] In some embodiments, the main body 20 further includes a shell 24 , which is movably connected to the piston 22 and is sleeved on the outer circumferential surface of the piston 22 .

[0064] In some embodiments, the housing 24 may have a receiving groove, the housing 24 may extend along the first direction X, and the axis of the housing 24 may be parallel to the axis of the piston 22 . Alternatively, the axis of the housing 24 may coincide with the axis of the piston 22 .

[0065] In some embodiments, the piston 22 may be loosely matched with the housing 24 in the radial direction, and in the first direction X, the piston 22 may move relative to the housing 24 .

[0066] By providing the housing 24 to be sleeved on the piston 22, the risk of the piston 22 or the ball screw 21 being damaged is reduced, the safety is improved, and the failure rate is reduced.

[0067] In some embodiments, the main body 20 further includes a stopper 25 , one end of which is connected to the piston 22 , and the other end of which is connected to the outer shell 24 . In the circumferential direction Y of the piston 22 , the stopper 25 abuts against the outer shell 24 .

[0068] In some embodiments, the anti-rotation member 25 may be in a block shape.

[0069] In some embodiments, the inner wall of the housing 24 may be provided with a mounting groove, and the mounting groove extends along the first direction X. A portion of the anti-rotation member 25 is fixedly connected to the piston 22, and another portion is disposed in the mounting groove. The anti-rotation member 25 may extend in the first direction X in the mounting groove, so that the piston 22 can move relative to the housing 24 in the first direction X.

[0070] In some embodiments, the stopper 25 abuts against the mounting groove at both ends of the piston 22 in the circumferential direction Y, thereby reducing the risk of rotation of the piston 22 so that the piston 22 can move along the first direction X to push the brake 30, reducing the failure rate.

[0071] In some embodiments, the circumferential direction of the piston 22 can be represented by the direction indicated by the letter Y in the figures.

[0072] In some embodiments, a portion of the stopper 25 may be interference-fitted with the piston 22 , and another portion may be clearance-fitted with the housing 24 .

[0073] In some embodiments, there are multiple detents 25 , and the multiple detents 25 are arranged at intervals along the circumferential direction Y of the piston 22 .

[0074] In some embodiments, the number of the detents 25 may be two, and the two detents 25 may be disposed opposite to each other along the axis of the piston 22 .

[0075] In some embodiments, the number of the detents 25 may be more than two, and the plurality of detents 25 may be arranged at intervals along the circumferential direction Y of the piston 22 .

[0076] In some embodiments, the number of the detents 25 may be more than two, and the plurality of detents 25 may be evenly distributed along the circumferential direction Y of the piston 22 .

[0077] By providing a plurality of anti-rotation members 25, the risk of the piston 22 rotating is further reduced, so that the piston 22 can move along the first direction X to push the brake 30, thereby reducing the failure rate.

[0078] In some embodiments, the main body 20 further includes a dust cover 26 . In the first direction X, the dust cover 26 is disposed at an end of the piston 22 away from the actuator 10 , and the dust cover 26 is disposed between the piston 22 and the housing 24 .

[0079] In some embodiments, an inner end of the dust cover 26 may be interference fit with the piston 22 in the radial direction, and an outer end of the dust cover 26 may be interference fit with the housing 24 in the radial direction.

[0080] By providing the dust cover 26, the risk of external pollution of the piston 22 and thus affecting the operation of the brake system 1 is reduced, thereby reducing the failure rate.

[0081] In some embodiments, the main body 20 further includes a piston O-ring 221 . The piston O-ring 221 is sleeved on the piston 22 . The piston O-ring 221 is disposed between the piston 22 and the housing 24 .

[0082] In some embodiments, a mounting groove may be provided on the inner wall of the housing 24, and the piston O-ring 221 may be provided in the mounting groove.

[0083] In some embodiments, the outer ring of the piston O-ring 221 may be interference fit with the housing 24 in the radial direction, and the inner ring of the piston O-ring 221 may be interference fit with the piston 22 in the radial direction.

[0084] In some embodiments, the material of the piston O-ring 221 may be rubber.

[0085] By providing the piston O-ring 221, the sealing performance is improved, the influence of the outside world on the piston 22 is reduced, and the failure rate is reduced. At the same time, the probability of the piston O-ring 221 moving in the first direction X is small, which further improves the sealing performance.

[0086] In some embodiments, the main body 20 further includes a screw gasket 214 , which can be clearance-matched with the ball screw 21 in the radial direction and fit with the ball screw 21 in the first direction X in a spherical surface.

[0087] In some embodiments, in the first direction X, the screw washer 214 can abut against an end of the bearing 213 facing away from the force sensor 23 .

[0088] By providing the screw gasket 214, the risk of wear of the ball screw 21 is reduced, and the risk of the ball screw 21 shaking or deflecting in the first direction X is reduced, thereby reducing the failure rate.

[0089] In some embodiments, the main body 20 may further include a bearing washer 215 , and the bearing washer 215 may be clearance-matched with the ball screw 21 in the radial direction.

[0090] In some embodiments, in the first direction X, one end of the bearing washer 215 may be in contact with the bearing 213 , and the other end may be in contact with the force sensor 23 .

[0091] By providing the bearing gasket 215, the risk of wear of the bearing 213 is reduced, and the risk of the bearing 213 shaking or deflecting in the first direction X is reduced, thereby reducing the failure rate.

[0092] In some embodiments, the main body 20 may further include a bushing 27. The outer ring of the bushing 27 may be interference-fitted with the piston 22 in the radial direction, and the inner ring of the bushing 27 may be clearance-fitted with the ball screw 21 in the radial direction.

[0093] By providing the bushing 27, the risk of wear of the ball screw 21 is reduced and the failure rate is reduced.

[0094] In some embodiments, the main body 20 may further include a housing O-ring 241. The outer peripheral surface of the housing 24 may be provided with a mounting groove, and the housing O-ring 241 may be disposed in the mounting groove to be interference-fitted with the housing 24 in the radial direction.

[0095] By providing the housing O-ring 241, the risk of the housing 24 shaking is reduced and the failure rate is reduced.

[0096] In some embodiments, the main body 20 may further include a shell retaining spring 242 . The outer peripheral surface of the shell 24 may be provided with a mounting groove. The shell retaining spring 242 may be disposed in the mounting groove and have an interference fit with the shell 24 in the radial direction.

[0097] By providing the housing retaining spring 242, the risk of the housing 24 opening in the radial direction is reduced, thereby reducing the failure rate.

[0098] In some embodiments, the main body 20 may further include a screw retaining spring 216 , and a mounting groove may be provided on the outer peripheral surface of the first end 212 of the ball screw 21 . The screw retaining spring 216 may be provided in the mounting groove and have an interference fit with the ball screw 21 in the radial direction.

[0099] By providing the screw retaining spring 216, the risk of the ball screw 21 shaking is reduced and the failure rate is reduced.

[0100] An embodiment of the present application also provides a vehicle, comprising the braking system 1 of any of the above embodiments.

[0101] In some embodiments, the vehicle may be a two-wheeled vehicle, such as a motorcycle, an electric vehicle, etc., or a four-wheeled vehicle, such as a car.

[0102] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A braking system, characterized in that: include: Actuator; A main body, comprising a ball screw and a piston, wherein the piston is sleeved on a portion of the outer circumference of the ball screw, and one end of the ball screw is connected to the actuator in a first direction; a brake connected to an end of the piston away from the actuator in the first direction; Wherein, the main body is configured so that when the ball screw receives the torque provided by the actuator, the piston is driven to push the brake along the first direction, and the first direction is parallel to the axial direction of the piston and the axial direction of the ball screw.

2. The braking system according to claim 1, characterized in that: The main body also includes a screw key, the ball screw includes a first end, the first end exceeds the piston in the first direction, the first end is connected to the actuator, and the screw key is arranged at the first end.

3. The braking system according to claim 2, characterized in that: The main body further comprises a bearing, and the bearing is sleeved on the first end.

4. The braking system according to claim 3, characterized in that: The main body further includes a force sensor, which is sleeved on the first end and arranged between the bearing and the actuator in the first direction.

5. The braking system according to claim 1, characterized in that: The main body also includes a shell, which is movably connected to the piston and is sleeved on the outer peripheral surface of the piston.

6. The braking system according to claim 5, characterized in that: The main body further comprises a stopper, one end of which is connected to the piston, and the other end of which is connected to the outer shell. In the circumferential direction of the piston, the stopper abuts against the outer shell.

7. The braking system according to claim 6, characterized in that: There are multiple detents, and the multiple detents are arranged at intervals along the circumference of the piston.

8. The braking system according to claim 5, characterized in that: The main body further comprises a dust cover. In the first direction, the dust cover is arranged at an end of the piston away from the actuator, and the dust cover is arranged between the piston and the housing.

9. The braking system according to claim 5, characterized in that: The main body further comprises a piston O-ring, wherein the piston O-ring is sleeved on the piston and arranged between the piston and the housing.

10. A vehicle, characterized in that: Comprising a braking system as claimed in any one of claims 1 to 9.

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