Electromechanical brake and vehicle

Abstract

The embodiment of the utility model discloses an electronic mechanical brake and a vehicle, and relates to the technical field of vehicle braking. The electromechanical brake includes: a housing; the power mechanism is arranged in the shell and is provided with a rotating output end; the rotary transmission mechanism is fixed in the shell, located on one side of the rotary output end and rotationally connected with the rotary output end; the linear transmission mechanism is arranged in the shell and located on the side, perpendicular to the power mechanism and facing the direction of the rotary transmission mechanism, of the rotary transmission mechanism, the linear transmission mechanism is in transmission connection with the rotary transmission mechanism, and the linear transmission mechanism converts rotary motion of the rotary transmission mechanism into linear motion; and the executing mechanism is arranged on the shell and located in the linear motion direction of the linear transmission mechanism, a brake area used for containing and clamping the brake disc is formed on the executing mechanism, and the executing mechanism is connected with the linear motion output end of the linear transmission mechanism so as to change the space size of the brake area.

Description

Technical Field

[0001] This application relates to the technical field of vehicle braking, and particularly to an electro-mechanical brake and a vehicle. Background Art

[0002] Today, with the rapid development of social economy and science and technology, while people pursue the power performance and comfort of vehicles, they also pay more and more attention to the safety of vehicles. Among them, particular emphasis is placed on the braking performance of vehicles, because the braking performance of vehicles is directly related to the safety of life and property, and good braking performance is the basic guarantee for the safe driving of vehicles.

[0003] The widely used hydraulic braking system on existing vehicles mainly consists of several parts such as a brake pedal, a master cylinder, a vacuum booster, hydraulic pipelines, wheel cylinders, and brakes. When vehicle braking is required, the driver steps on the brake pedal. Under the action of a series of mechanical structures and the vacuum booster, the hydraulic oil in the master cylinder flows into each wheel cylinder through the brake pipelines at a certain pressure, and finally drives the disc or drum brake to complete the braking action, thereby achieving the braking of the wheels. After a long period of development, hydraulic braking has become a very mature technology, and existing cars basically all adopt hydraulic braking systems.

[0004] Although the hydraulic braking system has been widely used, the mechanical components and hydraulic pipelines of the hydraulic braking system are numerous, the vacuum booster is large in volume, especially after integrating electronic control functions such as ABS, TCS, and ESP, the hydraulic braking system becomes more complex and difficult to arrange and assemble; in addition, the hydraulic oil of the hydraulic braking system needs to be replaced regularly, and there is a hidden danger of hydraulic oil leakage during use, which is likely to cause environmental pollution. Summary of the Utility Model

[0005] The embodiments of this application provide an electro-mechanical brake and a vehicle, so as to improve the problems of the current hydraulic braking system, such as complex structure, large volume, difficult arrangement and assembly, the need to replace hydraulic oil, and the risk of hydraulic oil leakage.

[0006] In a first aspect, the embodiments of this application provide an electro-mechanical brake for use in a vehicle having a brake disc, the electro-mechanical brake being configured to clamp the brake disc, the electro-mechanical brake comprising:

[0007] A housing;

[0008] A power mechanism disposed within the housing and having a rotational output end;

[0009] A rotation transmission mechanism, the rotation transmission mechanism is fixed in the housing and is located at one side of the rotation output end, and is rotationally connected to the rotation output end;

[0010] A linear transmission mechanism, which is disposed in the housing and located on a side of the rotary transmission mechanism perpendicular to the direction in which the power mechanism faces the rotary transmission mechanism, and is in transmission connection with the rotary transmission mechanism, and converts the rotary motion of the rotary transmission mechanism into a linear motion;

[0011] An actuator is arranged on the housing and located in the direction of the linear motion of the linear transmission mechanism. The actuator forms a braking area for accommodating and clamping the brake disc. The actuator is connected to the linear motion output end of the linear transmission mechanism to change the spatial size of the braking area.

[0012] In some embodiments of the present application, the power mechanism includes a motor assembly and a motor gear, the motor gear is fixedly connected to the output shaft of the motor assembly, the output shaft extends toward the direction of the rotary transmission mechanism, and the rotary transmission mechanism is meshingly connected to the motor gear.

[0013] In some embodiments of the present application, the rotation transmission mechanism includes a first sun gear set, a second sun gear set, a first planetary carrier and a second planetary carrier, the first planetary carrier is rotatably sleeved on the rotation output end, the first sun gear set is rotatably sleeved on the side of the first planetary carrier facing the power mechanism, the second planetary carrier is rotatably sleeved on the output shaft of the power mechanism and is located on the side of the first planetary carrier away from the first sun gear set, the second sun gear set is rotatably sleeved on the side of the second planetary carrier facing the first planetary carrier, the side of the first planetary carrier away from the first sun gear set is rotatably connected with a transmission gear, the second sun gear set is meshed with the transmission gear, and the second sun gear set is transmission-connected to the linear transmission mechanism.

[0014] In some embodiments of the present application, the first sun gear set includes a plurality of first planetary gears, and the second sun gear set includes a plurality of second planetary gears, the plurality of first planetary gears are rotatably disposed on the first planetary carrier and arranged in an array around the center of a circle of the first planetary carrier, the plurality of second planetary gears are rotatably disposed on the second planetary carrier and arranged in an array around the center of a circle of the second planetary carrier, and the plurality of second planetary gears surround the transmission gear and are in meshing engagement with the transmission gear.

[0015] In some embodiments of the present application, the rotational transmission mechanism further includes a rotational stabilizer, which is provided on the inner wall of the housing and is in interference fit with the housing. An internal gear ring is provided on the inner side of the rotational stabilizer, and the first planetary gear and the second planetary gear are both provided on the rotational stabilizer and mesh with the internal gear ring.

[0016] In some embodiments of the present application, the linear transmission mechanism includes:

[0017] An adjusting bolt, which is rotatably provided in the housing and meshes with the gears of the rotational transmission mechanism;

[0018] A piston, which is threadedly connected to the adjusting bolt and moves along the axial direction of the adjusting bolt as the adjusting bolt rotates.

[0019] In some embodiments of the present application, the linear transmission mechanism includes:

[0020] A threaded lead screw, which is rotatably provided in the housing and meshes with the gears of the rotational transmission mechanism;

[0021] A piston, which is sleeved on the threaded lead screw and an internal thread is formed on the inner wall of the piston. The internal thread matches and is spaced apart from the thread on the threaded lead screw to form a rolling space;

[0022] A number of steel balls, which are provided in the rolling space and arranged in sequence along the internal thread.

[0023] In some embodiments of the present application, the linear transmission mechanism includes:

[0024] A screw rod, which is rotatably provided in the housing and meshes with the gears of the rotational transmission mechanism;

[0025] A piston, which is sleeved on the screw rod and an internal thread is formed on the inner wall of the piston. A rotating space is formed between the piston and the screw rod;

[0026] A number of rollers, which are provided in the rotating space and arranged in an array along the circumferential direction of the screw rod. External threads are provided on the rollers, and the external threads extend along the axial direction of the rollers and are in threaded cooperation with the internal thread and the screw rod.

[0027] In some embodiments of the present application, the actuator includes:

[0028] An internal friction plate, which is fixedly connected to the piston and extends to the outside of the housing;

[0029] An outer friction plate, which is arranged on the outer shell and is arranged opposite to the inner friction plate to define the braking area;

[0030] A spring plate, which is fixed on the circumference of the piston and fixedly connected to the inner friction plate.

[0031] In a second aspect, the present application provides a vehicle, including the electromechanical brake as described in the first aspect.

[0032] It can be seen that in the embodiments of the present application, mainly by using the power mechanism, the rotary transmission mechanism, the linear transmission mechanism and the actuator to cooperate in transmission, the power of the power mechanism is transmitted to the actuator to realize the clamping and loosening control of the brake disc, so as to realize mechanical dry braking. There are fewer components compared with the hydraulic braking system, the structure is simple, easy to assemble, and there is no problem of hydraulic oil leakage. Specifically, by using the power mechanism to provide rotational power, the rotary transmission mechanism transmits the rotation of the power mechanism to the linear transmission mechanism, and then uses the linear transmission mechanism to convert the rotational motion of the power mechanism into a linear motion, and uses the linear motion to drive the actuator to change the size of the braking area space, so as to realize the clamping and loosening of the brake disc and the adjustment of the clamping force. Also, by arranging the rotary transmission mechanism on one side of the power mechanism, and arranging the linear transmission mechanism and the actuator on the side perpendicular to the direction of the power mechanism facing the rotary transmission mechanism, the reasonable arrangement of the power mechanism, the rotary transmission mechanism, the linear transmission mechanism and the actuator is realized, reducing the occupied area in one direction and achieving the effect of a compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0034] Figure 1 It is a schematic structural diagram of an electromechanical brake provided by the present practical embodiment;

[0035] Figure 2 For Figure 1 the exploded structural diagram;

[0036] Figure 3 It is a schematic structural diagram of another electromechanical brake provided by the present practical embodiment;

[0037] Figure 4 It is a schematic structural diagram of an adjusting bolt provided by the present practical embodiment;

[0038] Figure 5 Another structural schematic diagram of the adjusting bolt provided by this practical embodiment.

[0039] Explanation of the reference numerals:

[0040] 1. Housing; 11. Caliper housing; 12. Caliper cover; 13. Caliper bracket; 2. Power mechanism; 21. Motor assembly; 22. Motor gear; 3. Rotational transmission mechanism; 31. First planetary gear; 32. Second planetary gear; 33. First planetary carrier; 34. Second planetary carrier; 35. Transmission gear; 36. Rotational stabilizer; 4. Linear transmission mechanism; 41. Adjusting bolt; 42. Piston; 43. Threaded lead screw; 44. Steel ball; 45. Screw; 46. Roller; 5. Actuating mechanism; 51. Outer friction plate; 52. Inner friction plate; 53. Spring plate; 6. Bush; 7. Thrust bearing. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope protected by the present application.

[0042] In the description of the present application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0043] Please refer to Figure 1 and Figure 2 , an electromechanical brake provided by an embodiment of the present application is used in a vehicle. The vehicle has a brake disc, and the electromechanical brake is used to clamp the brake disc. The electromechanical brake includes:

[0044] Housing 1;

[0045] Power mechanism 2, which is arranged in the housing 1 and has a rotational output end;

[0046] Rotational transmission mechanism 3, which is fixed in the housing 1 and located on one side of the rotational output end, and is rotationally connected to the rotational output end;

[0047] A linear transmission mechanism 4 is provided. The linear transmission mechanism 4 is disposed inside the housing 1 and on one side of the rotary transmission mechanism 3 perpendicular to the direction in which the power mechanism 2 faces the rotary transmission mechanism 3. The linear transmission mechanism 4 is in transmission connection with the rotary transmission mechanism 3, and the linear transmission mechanism 4 converts the rotary motion of the rotary transmission mechanism 3 into a linear motion.

[0048] An actuator 5 is provided. The actuator 5 is disposed on the housing 1 and in the direction of the linear motion of the linear transmission mechanism 4. The actuator 5 forms a braking area for accommodating and clamping a brake disc. The actuator 5 is connected to the linear motion output end of the linear transmission mechanism 4 to change the spatial size of the braking area.

[0049] The technical solution provided by the embodiment of the present application mainly realizes the clamping and loosening control of the brake disc by the transmission cooperation of the power mechanism 2, the rotary transmission mechanism 3, the linear transmission mechanism 4 and the actuator 5, so as to realize mechanical dry braking. There are fewer components compared with a hydraulic braking system, the structure is simple, easy to assemble, and there is no problem of hydraulic oil leakage. Specifically, by using the power mechanism 2 to provide rotational power, the rotary transmission mechanism 3 transmits the rotation of the power mechanism 2 to the linear transmission mechanism 4, and the linear transmission mechanism 4 is used to convert the rotational motion of the power mechanism 2 into a linear motion. The linear motion drives the actuator 5 to change the spatial size of the braking area, so as to realize the clamping and loosening of the brake disc and the adjustment of the clamping force. Also, by arranging the rotary transmission mechanism 3 on one side of the power mechanism 2, and arranging the linear transmission mechanism 4 and the actuator 5 on the side perpendicular to the direction in which the power mechanism 2 faces the rotary transmission mechanism 3, a reasonable layout of the power mechanism 2, the rotary transmission mechanism 3, the linear transmission mechanism 4 and the actuator 5 is achieved, reducing the occupied area in one direction and achieving a compact structure.

[0050] All in all, the technical solution provided by the present application has the following compared with the traditional hydraulic braking system:

[0051] A simpler structure: The electro-mechanical brake adopts a relatively simple structure, including a housing 1, a power mechanism 2, a rotary transmission mechanism 3, a linear transmission mechanism 4 and an actuator 5. Compared with the traditional hydraulic braking system, mechanical components and hydraulic pipelines are reduced, thereby improving the convenience of manufacturing and assembly.

[0052] Reduced space requirements: The electro-mechanical brake caliper has a compact shape and does not require a large vacuum booster, which helps to reduce the occupied space of the braking system and makes it applicable to various vehicle models, including those with limited space.

[0053] Simplified maintenance requirements: Unlike traditional hydraulic brake systems that require regular replacement of hydraulic oil and are prone to leakage, the hydraulic part of the electronic mechanical brake caliper is relatively simple, reducing maintenance requirements and the risk of hydraulic oil leakage.

[0054] Improved environmental friendliness: Due to the reduced demand for hydraulic oil, the electromechanical brake system helps to reduce the consumption of hydraulic oil and reduce the risk of environmental pollution.

[0055] Precise braking control: Through the linear transmission mechanism 4 and the actuator 5, the electronic mechanical brake caliper can more accurately control the spatial size of the braking area, provide more controllable braking force, and thus improve braking performance and safety.

[0056] In order to facilitate those skilled in the art and other persons to better understand the technical solution provided by the present application, the housing 1, the power mechanism 2, the rotary transmission mechanism 3, the linear transmission mechanism 4 and the actuator 5 are respectively described in detail below:

[0057] The housing 1 includes a caliper housing 11, a caliper bracket 13 and a caliper cover 12. The caliper bracket 13 is detachably connected to the caliper housing 11 and defines a caliper cavity, in which the power mechanism 2, the rotary transmission mechanism 3 and the linear transmission mechanism 4 are all arranged. The caliper cover 12 is connected to the side of the caliper housing 11 away from the caliper bracket 13, and is used to close the side of the caliper bracket 13 away from the caliper cavity.

[0058] The power mechanism 2 includes a motor assembly 21 and a motor gear 22. The motor gear 22 is fixedly connected to the output shaft of the motor assembly 21, and the output shaft extends toward the direction of the rotation transmission mechanism 3. The rotation transmission mechanism 3 is meshed and connected with the motor gear 22. The motor assembly 21 rotates, thereby driving the motor gear 22 to rotate. The motor gear 22 rotates, and through the meshing of the gears, the rotation of the motor is transmitted to the rotation transmission mechanism 3, driving the rotation transmission mechanism 3 to rotate.

[0059] Furthermore, a motor sensor is provided on the motor assembly 21 for detecting the rotation angle of the output shaft on the motor assembly 21. By controlling the rotation angle of the output shaft of the motor assembly 21, the distance that the linear transmission mechanism 4 pushes the actuator 5 to move is controlled, thereby accurately controlling the size of the braking area and achieving precise braking.

[0060] In some embodiments, the rotation transmission mechanism 3 includes a first sun gear group, a second sun gear group, a first planetary carrier 33 and a second planetary carrier 34, the first planetary carrier 33 is rotatably sleeved on the rotation output end, the first sun gear group is rotatably sleeved on the side of the first planetary carrier 33 facing the power mechanism 2, the second planetary carrier 34 is rotatably sleeved on the output shaft of the power mechanism 2 and is located on the side of the first planetary carrier 33 away from the first sun gear group, the second sun gear group is rotatably sleeved on the side of the second planetary carrier 34 facing the first planetary carrier 33, the side of the first planetary carrier 33 away from the first sun gear group is rotatably connected with a transmission gear 35, the second sun gear group is gear-meshed with the transmission gear 35, and the second sun gear group is transmission-connected to the linear transmission mechanism 4.

[0061] By treating the motor gear 22 as a sun gear, when the power mechanism 2 provides rotational power, this power is transmitted to the first sun gear set through the motor gear 22 fixedly connected to the output shaft, the motor gear 22 rotates, and the planetary gear rotates around the motor gear 22. The first planet carrier 33 is connected to a transmission gear 35 on the side away from the first sun gear set, and the task of the transmission gear 35 is to transmit the rotational motion to the second sun gear set. The second sun gear set receives the power transmitted by the transmission gear 35 and starts to rotate. The rotational motion of the second sun gear set is transmitted to the linear transmission mechanism 4, and the entire transmission process only needs to be completed through a mechanical connection structure. The linear transmission mechanism 4 converts the rotational motion into linear motion. The linear motion is utilized by the actuator 5, which is located on the housing 1 and has a braking area for accommodating and clamping the brake disc. When the output end of the linear transmission mechanism 4 moves, the actuator 5 can change the spatial size of the braking area. The working principle of this rotary transmission mechanism 3 allows the rotational motion to be transmitted from the power mechanism 2 to the linear transmission mechanism 4, so that the actuator 5 can accurately control the size of the braking area, thereby realizing the braking operation. The structure in this embodiment provides highly controllable braking performance and realizes the braking function in a compact structure, and is suitable for braking systems of various vehicles.

[0062] Further, the first sun gear set includes a plurality of first planetary gears 31, and the second sun gear set includes a plurality of second planetary gears 32. The plurality of first planetary gears 31 are rotatably disposed on the first planetary carrier 33 and are arranged in an array around the center of the first planetary carrier 33. The plurality of second planetary gears 32 are rotatably disposed on the second planetary carrier 34 and are arranged in an array around the center of the second planetary carrier 34. The plurality of second planetary gears 32 surround the transmission gear 35 and are in gear meshing with the transmission gear 35. The following is an example to illustrate the structural coordination between the specific sun gear sets:

[0063] In this embodiment, three first planetary gears 31 are provided, three second planetary gears 32 are provided, the first planetary frame 33 is provided in a circular shape, and three first rotating columns are provided on the side of the first planetary frame 33, and the second planetary frame 34 is also provided in a circular shape and three second rotating columns are provided on the side. The three first planetary gears 31 are respectively rotatably connected to the three first rotating columns, the three first planetary gears 31 are arranged in an array along the circumferential direction of the first planetary frame 33, and the motor gear 22 is located at the center of the array of the three first planetary gears 31, and the three first planetary gears 31 are all gear-engaged with the motor gear 22. The three second planetary gears 32 are respectively rotatably connected to the three second rotating columns and are arranged toward the first planetary frame 33. A transmission gear 35 is provided at the center of the first planetary frame 33, and the transmission gear 35 is located between the first planetary frame 33 and the second planetary frame 34, the three second planetary gears 32 are arranged in an array along the circumferential direction of the second planetary frame 34, the transmission gear 35 is located at the center of the array of the three second planetary gears 32, and the three second planetary gears 32 are all gear-engaged with the transmission gear 35. The motor gear 22 rotates, and the three first planetary gears 31 rotate, driving the first planetary carrier 33 to rotate. The transmission gear 35 rotates with the first planetary carrier 33, and the second planetary gear 32 rotates with the transmission gear 35, thereby driving the second planetary carrier 34 to rotate. The second planetary carrier 34 is connected to the linear transmission mechanism 4, thereby driving the linear transmission mechanism 4 to rotate.

[0064] Furthermore, an outer ring gear is provided on the outer edge of the second planet carrier 34, and the outer ring gear is meshed with the gear of the linear transmission mechanism 4. Through the outer ring gear of the second planet carrier 34, when the second planet carrier 34 rotates, the outer ring gear can mesh with the gear of the linear transmission mechanism 4, thereby transmitting the rotational motion of the second planet carrier 34 to the linear transmission mechanism 4.

[0065] In some embodiments, the rotation transmission mechanism 3 further includes a rotation stabilizing member 36. The rotation stabilizing member 36 is disposed on the inner wall of the housing 1 and is interference fit with the housing 1. The rotation stabilizing member 36 is cylindrical and hollow in the middle. The cylindrical rotation stabilizing member 36 is interference fit with the housing 1, thereby achieving the purpose of fixing the rotation stabilizing member 36. In addition, an inner gear ring is disposed on the inner side of the rotation stabilizing member 36, and the inner gear ring is disposed around the inner wall of the rotation stabilizing member 36. The first planetary gear 31 and the second planetary gear 32 are both disposed in the rotation stabilizing member 36 and meshed with the inner gear ring. When the first planetary gear 31 and the second planetary gear 32 respectively make circular motions around the motor gear 22 and the transmission gear 35, by fixing the rotation stabilizing member 36 and using the inner gear ring of the rotation stabilizing member 36 to mesh with the first planetary gear 31 and the second planetary gear 32, the rotational motion of the first planetary gear 31 and the second planetary gear 32 can be further stabilized, so that the rotation of the first planetary gear 31 and the second planetary gear 32 is more stable.

[0066] In some embodiments, the linear drive mechanism 4 includes:

[0067] An adjusting bolt 41 rotatably disposed within the housing 1 and in gear engagement with the rotary drive mechanism 3;

[0068] A piston 42 threadedly connected to the adjusting bolt 41 and moving along the axial direction of the adjusting bolt 41 as the adjusting bolt 41 rotates.

[0069] The adjusting bolt 41 has a screw rod 45 portion and a screw head portion. The screw head portion is circular, and circumferential external teeth are provided on the outer edge of the screw head portion. By engaging the circumferential external teeth with the external gear ring of the second planet carrier 34, the rotational movement of the second planet carrier 34 is transmitted to the adjusting bolt 41. The screw rod 45 portion of the adjusting bolt 41 is provided with threads along its axial direction. The piston 42 is in a hollow cylindrical shape, and threads are provided on the inner wall of the hollow cylindrical shape. The threads of the piston 42 are in threaded fit with the threads of the screw rod 45 portion. The rotational movement of the second planet carrier 34 is transmitted to the adjusting bolt 41, and the adjusting bolt 41 rotates to drive the piston 42 to perform a linear feeding movement, achieving the conversion of rotational movement into linear movement. It should also be noted that in order to make the linear movement of the piston 42 smoother under the rotation of the adjusting bolt 41, the piston 42 and the adjusting bolt 41 are set to have a clearance fit, and the clearance value is between 0.3 mm and 0.5 mm, realizing the clearance fit of the thread pair.

[0070] In addition to the above method of threadedly fitting the piston 42 with the adjusting bolt 41, please refer to Figures 3 to 5 , in other embodiments, a ball screw can also be used. Specifically, the linear drive mechanism includes:

[0071] A threaded screw rod 43 rotatably disposed within the housing 1 and in gear engagement with the rotary drive mechanism 3;

[0072] A piston 42 sleeved on the threaded screw rod 43, and internal threads are formed on the inner wall of the piston 42. The internal threads are matched with and spaced from the threads on the threaded screw rod 43 to form a rolling space;

[0073] A plurality of steel balls 44 disposed within the rolling space and arranged in sequence along the internal threads.

[0074] By using the cooperation between the steel balls on the threaded screw rod 43 and the piston 42, the sliding friction is converted into rolling friction, and on the basis of realizing the linear movement of the piston 42, the transmission efficiency can also be improved.

[0075] In other embodiments, a roller screw can also be used. Specifically, the linear drive mechanism includes:

[0076] A screw rod 45, the screw rod 45 is rotatably arranged in the housing 1 and is in gear engagement with the rotary drive mechanism 3;

[0077] A piston 42, the piston 42 is sleeved on the screw rod 45 and an internal thread is formed on the inner wall of the piston 42, and a rotation space is formed between the piston 42 and the screw rod 45;

[0078] A plurality of rollers 46, the plurality of rollers 46 are arranged in the rotation space and are arranged in an array along the circumferential direction of the screw rod 45, external threads are provided on the rollers 46, and the external threads extend along the axial direction of the rollers 46 and are in threaded cooperation with the internal thread and the screw rod 45.

[0079] By arranging an internal thread steel ball 44 piston 42 extending along its axial direction on the inner wall of the piston 42, the adjusting bolt 41 is replaced with a screw rod 45, and the screw rod 45 extends into the steel ball 44 piston 42 and forms a rotation space with the inner wall of the piston 42. A plurality of rollers 46 are arranged in the rotation space of the steel ball 44, and the plurality of rollers 46 are arranged circumferentially along the inner peripheral wall of the steel ball 44 piston 42, and the rollers 46 are in threaded cooperation with the steel ball 44 piston 42 and the screw rod 45 respectively. By adopting a roller screw, on the basis of realizing the linear motion of the piston 42, the torque transmission can also be increased.

[0080] In some embodiments, the actuator 5 includes:

[0081] An inner friction plate 52, the inner friction plate 52 is fixedly connected to the piston 42 and extends to the outside of the housing 1;

[0082] An outer friction plate 51, the outer friction plate 51 is arranged on the housing 1 and is arranged opposite to the inner friction plate 52 to define the braking area;

[0083] A spring plate 53, the spring plate 53 is fixed on the circumference of the piston 42 and is fixedly connected to the inner friction plate 52.

[0084] Among them, the outer friction plate 51 is used as a passive braking structure, and the inner friction plate 52 is fixedly connected to the piston 42. When the motor rotates, through a series of transmissions, the adjusting bolt 41 will drive the piston 42 to make linear motion, and the linear motion includes moving toward the outer friction plate 51 and moving away from the outer friction plate 51. When the piston 42 moves toward the outer friction plate 51, it will push the inner friction plate 52 to move toward the outer friction plate 51, thereby reducing the space in the braking area, and with the movement of the inner friction plate 52, the inner friction plate 52 and the outer friction plate 51 clamp the brake disc, and the clamping force gradually increases; when the piston 42 moves away from the outer friction plate 51, it will drive the inner friction plate 52 to move away from the outer friction plate 51, thereby increasing the space in the braking area, and the clamping force will decrease until it disappears, releasing the brake disc and canceling the brake. It should also be explained that by fixing the spring sheet 53 on the circumference of the piston 42, when the inner friction plate 52 moves away from the outer friction plate 51, the spring sheet 53 can generate a pulling force on the inner friction plate 52, thereby pulling the inner friction plate 52 back to its initial position. Compared with relying solely on the adjusting bolt 41 to drive the inner friction plate 52 to move, the inner friction plate 52 returns to its initial position more quickly by further pulling back the inner friction plate 52 using the spring sheet 53.

[0085] In some embodiments, the electronic mechanical brake further includes a plurality of sleeves 6 and thrust bearings 7, wherein the plurality of sleeves 6 are fixedly disposed in the housing 1, and the plurality of sleeves 6 are respectively sleeved on the output shaft of the motor and the adjusting bolt 41. The thrust bearing 7 is disposed between the adjusting bolt 41 and the caliper cover 12, and the adjusting bolt 41 is in contact with the thrust bearing 7 and has relative motion.

[0086] The working process of the electromechanical brake provided by the present application is described below, including the braking process and the releasing process:

[0087] Braking process: the motor assembly 21 is controlled to rotate, and the motor gear 22 rotates driven by the rotation of the motor assembly 21. The motor gear 22 serves as the sun gear in the first sun gear set, and its rotation drives the first planetary gears 31 to rotate, thereby driving the first planetary carrier 33 to rotate. The transmission gear 35 rotates with the rotation of the first planetary carrier 33, and the second planetary gear 32 rotates with the rotation of the transmission gear 35, thereby driving the second planetary carrier 34 to rotate. The rotation of the second planetary carrier 34 drives the adjusting bolt 41 to rotate. When the adjusting bolt 41 rotates, the piston 42 moves along the axial direction of the adjusting bolt 41. If the motor is controlled to rotate forward, the piston 42 moves toward the outer friction plate 51, thereby driving the inner friction plate 52 to move toward the outer friction plate 51, thereby realizing the clamping braking of the brake disc.

[0088] Release process: Control the reverse rotation of the motor assembly 21. The motor gear 22 rotates driven by the rotation of the motor assembly 21. As the sun gear in the first sun gear set, the rotation of the motor gear 22 drives several first planetary gears 31 to rotate, thereby driving the rotation of the first planet carrier 33. The transmission gear 35 rotates with the rotation of the first planet carrier 33, and the second planetary gear 32 rotates with the rotation of the transmission gear 35, thereby driving the rotation of the second planet carrier 34. The rotation of the second planet carrier 34 drives the adjustment bolt 41 to rotate. Under the rotation of the adjustment bolt 41, the piston 42 moves in a direction away from the outer friction plate 51, thereby driving the inner friction plate 52 to move in a direction away from the outer friction plate 51, realizing the clamping release of the brake disc; and, during the release process, the elastic force accumulated by the spring piece 53 is also released, thereby forming a pulling force on the inner friction plate 52 in a direction away from the outer friction plate 51 to assist the inner friction plate 52 to reset.

[0089] This practical embodiment also provides a braking system, which includes the electro-mechanical brake described in any one of the above embodiments. As a preferred example, the braking system includes four electro-mechanical brakes, a brake pedal, a central controller, and an ABS control module. The four electro-mechanical brakes, the brake pedal, the central controller, and the ABS control module are connected through communication lines. The brake pedal can adopt an electro-mechanical pedal simulator.

[0090] The braking system proposed in this utility model is an electro-mechanical braking system. Compared with the traditional hydraulic braking system, the electro-mechanical braking system uses electrical energy as the energy source. The power mechanism 2 drives the actuator 5 to press against the brake disc to achieve the braking function, with energy transmitted by wires and signals transmitted by data lines. The simple structure and high efficiency of the electro-mechanical braking system greatly improve the braking safety of vehicles. Compared with the traditional hydraulic braking system, the electro-mechanical braking system has the following advantages: fewer mechanical connections, no hydraulic braking pipelines, which can effectively reduce the vehicle's overall mass; simple structure, small volume, and easy to arrange; mechanical and electrical connections are adopted, with rapid signal transmission, fast braking response, and sensitive reaction; high transmission efficiency, saving energy; powerful electronic intelligent control function, which can achieve complex electronic control functions such as ABS, TCS, ESP, and ACC by modifying software programs and configuring relevant parameters, and is easy to match with new energy vehicles with a braking energy recovery system; the electro-mechanical braking system adopts a modular structure, with simple assembly and convenient maintenance; an electronic pedal is adopted, canceling the mechanical and hydraulic connections between the brake pedal and the brake actuator 5. On the one hand, there will be no rebound vibration of the brake pedal when performing actions such as ABS, improving braking comfort. On the other hand, when the vehicle collides, the impact force will not be transmitted to the cab through the braking system, improving the vehicle's passive safety; there are no hydraulic braking pipelines and brake fluid, eliminating the problems of hydraulic oil replacement and hydraulic oil leakage, which is environmentally friendly. The electro-mechanical braking system has no non-recyclable components and hardly pollutes the environment; more communication interfaces can be expanded, enhancing the integration of the braking system with the vehicle's intelligent networking. The four-wheel braking of the vehicle can be independently controlled, thus achieving a higher level of driverless driving.

[0091] The embodiments of this utility model also provide a vehicle, including the electro-mechanical brake or braking system described in any of the above embodiments. In specific implementation, electro-mechanical brakes can be provided at the four wheels of the vehicle.

[0092] In specific implementation, when the vehicle brakes, the driver steps on the brake pedal, and the signal of the pedal sensor on the brake pedal is sent to the central controller. The central controller analyzes the braking intention of the pedal sensor signal and formulates a reasonable braking force in combination with information such as the current vehicle speed, vehicle body movement posture, and real-time road surface scene through the vehicle CAN signal, and outputs it to the brake controllers of each electro-mechanical brake to control the braking force of each electro-mechanical brake in real time. When the brake controller receives the braking force command from the central controller, the brake controller controls the speed and torque of the four motor assemblies 21 of the electro-mechanical brake to achieve the service braking and ABS anti-lock function.

[0093] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only an example and does not constitute a limitation to this application. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are proposed in this application, so such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of this application.

[0094] Meanwhile, this application uses specific terms to describe the embodiments of this application. Such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0095] Similarly, it should be noted that, in order to simplify the expression of the disclosure of this application and thus help the understanding of one or more embodiments of the application, in the description of the embodiments of this application above, sometimes multiple features are grouped into one embodiment, drawing, or description thereof. However, this disclosure method does not mean that the features required by the subject matter of this application are more than those mentioned in the claims. In fact, the features of the embodiment are fewer than all the features of the single embodiment disclosed above.

[0096] For each patent, patent application, patent application publication, and other materials cited in this application, such as articles, books, specifications, publications, documents, etc., hereby incorporate their entire contents into this application as references, except for the application history documents that are inconsistent with or conflict with the content of this application, and also except for the documents that limit the broadest scope of the claims of this application (currently or subsequently attached to this application). It should be noted that if there are inconsistencies or conflicts between the descriptions, definitions, and / or uses of terms in the attached materials of this application and the content of this application, the descriptions, definitions, and / or uses of terms in this application shall prevail.

[0097] The above are only the preferred embodiments of this application and are not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. An electromechanical brake for use in a vehicle, the vehicle having a brake disc, the electromechanical brake being configured to clamp the brake disc, characterized in that, The electromechanical brake comprises: shell; A power mechanism, the power mechanism is disposed in the housing and has a rotation output end; A rotation transmission mechanism, the rotation transmission mechanism is fixed in the housing and is located at one side of the rotation output end, and is rotationally connected to the rotation output end; A linear transmission mechanism, which is disposed in the housing and located on a side of the rotary transmission mechanism perpendicular to the direction in which the power mechanism faces the rotary transmission mechanism, and is in transmission connection with the rotary transmission mechanism, and converts the rotary motion of the rotary transmission mechanism into a linear motion; An actuator is arranged on the housing and located in the direction of the linear motion of the linear transmission mechanism. The actuator forms a braking area for accommodating and clamping the brake disc. The actuator is connected to the linear motion output end of the linear transmission mechanism to change the spatial size of the braking area.

2. The electro-mechanical brake according to claim 1, characterized in that, The power mechanism includes a motor assembly and a motor gear. The motor gear is fixedly connected to the output shaft of the motor assembly. The output shaft extends toward the direction of the rotary transmission mechanism. The rotary transmission mechanism is meshed and transmission-connected with the motor gear.

3. The electro-mechanical brake according to claim 1, characterized in that, The rotary transmission mechanism includes a first sun gear set, a second sun gear set, a first planetary carrier and a second planetary carrier, the first planetary carrier is centrally rotated sleeved on the rotation output end, the first sun gear set is rotationally arranged on the side of the first planetary carrier facing the power mechanism, the second planetary carrier is centrally rotated sleeved on the output shaft of the power mechanism and is located on the side of the first planetary carrier away from the first sun gear set, the second sun gear set is rotationally arranged on the side of the second planetary carrier facing the first planetary carrier, the side of the first planetary carrier away from the first sun gear set is rotationally connected with a transmission gear, the second sun gear set is meshed with the transmission gear, and the second sun gear set is transmission-connected to the linear transmission mechanism.

4. The electromechanical brake according to claim 3, wherein, The first sun gear set includes a plurality of first planetary gears, and the second sun gear set includes a plurality of second planetary gears. The plurality of first planetary gears are rotatably arranged on the first planetary carrier and arranged in an array around the center of a circle of the first planetary carrier. The plurality of second planetary gears are rotatably arranged on the second planetary carrier and arranged in an array around the center of a circle of the second planetary carrier. The plurality of second planetary gears surround the transmission gear and are meshed with the transmission gear.

5. The electromechanical brake according to claim 4, characterized in that, The rotary transmission mechanism also includes a rotation stabilizing member, which is arranged on the inner wall of the outer shell and has an interference fit with the outer shell, and an inner gear ring is provided on the inner side of the rotation stabilizing member, and the first planetary gear and the second planetary gear are both arranged on the rotation stabilizing member and mesh with the inner gear ring.

6. The electromechanical brake according to claim 1, characterized in that The linear transmission mechanism comprises: An adjusting bolt, the adjusting bolt is rotatably disposed in the housing and meshes with the gear of the rotary transmission mechanism; The piston is threadedly connected to the adjusting bolt and moves along the axial direction of the adjusting bolt as the adjusting bolt rotates.

7. The electromechanical brake according to claim 1, wherein, The linear drive mechanism includes: A threaded lead screw, which is rotatably arranged in the housing and is in gear engagement with the rotary drive mechanism; A piston, which is sleeved on the threaded lead screw and has internal threads formed on the inner wall of the piston. The internal threads are matched with the threads on the threaded lead screw and are spaced apart to form a rolling space; A plurality of steel balls, which are arranged in the rolling space and are arranged in sequence along the internal threads.

8. The electromechanical brake according to claim 1, characterized in that, The linear drive mechanism includes: A screw rod, which is rotatably arranged in the housing and is in gear engagement with the rotary drive mechanism; A piston, which is sleeved on the screw rod and has internal threads formed on the inner wall of the piston. A rotating space is formed between the piston and the screw rod; A plurality of rollers, which are arranged in the rotating space and are arranged in an array along the circumferential direction of the screw rod. External threads are provided on the rollers, and the external threads extend along the axial direction of the rollers and are in screw fit with the internal threads and the screw rod.

9. The electromechanical brake according to any one of claims 6 to 8, characterized in that, The actuator includes: An inner friction plate, which is fixedly connected to the piston and extends to the outside of the housing; An outer friction plate, which is arranged on the housing and is arranged opposite to the inner friction plate to define the braking area; A spring plate, which is fixed on the circumference of the piston and is fixedly connected to the inner friction plate.

10. A vehicle, characterized in that, An electro-mechanical brake according to any one of claims 1 to 8.

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