Actuator assembly of electromechanical brake, electromechanical brake and vehicle

Abstract

An actuator assembly of an electromechanical brake, comprising a housing (100) and a support (200), wherein the support is connected to a first end (101) of the housing, and an inner friction plate (300) and an outer friction plate (400) are mounted on the support. A driving mechanism (500), a transmission mechanism (600) and an actuating mechanism (700) are arranged in the housing, wherein the driving mechanism is arranged side by side on a side surface of the actuating mechanism, and the transmission mechanism is connected between the driving mechanism and the actuating mechanism and transmits the output of the driving mechanism to the actuating mechanism. The actuating mechanism comprises a rotating assembly (710) and an actuating assembly (720), wherein the rotating assembly is rotatably connected outside the actuating assembly and is connected to the transmission mechanism, the actuating assembly is connected to the inner friction plate, and the rotating assembly is driven by the transmission mechanism to rotate around a first axis and drive the actuating assembly to move along the first axis. Further disclosed are an electromechanical brake and a vehicle. The actuator assembly has the advantages of a shorter axial space, a greater clamping force on a brake disc, a lead screw being capable of retracting, in a timely manner, to achieve zero drag when clamping is released, the overall structure being more compact, and the installation cost and assembly difficulty being low.

Description

Electromechanical brake actuator assembly, electromechanical brake and vehicle Technical Field

[0001] This invention relates to the field of brake technology, and more particularly to an electromechanical brake actuator assembly, an electromechanical brake, and a vehicle. Background Technology

[0002] Electromechanical brakes are used in vehicle braking systems; with the development of new technologies such as vehicle electrification and autonomous driving, new demands have been placed on the electrification of vehicle braking systems.

[0003] Traditional vehicle braking systems are hydraulic, requiring the driver to pressurize the system via the brake pedal. This traditional system is not ideal for features like autonomous driving. Electromechanical brakes, on the other hand, allow for electronic control of the braking system. Vehicle braking signals are transmitted to the brake system controller, which then drives the braking system via an electronically controlled motor. Furthermore, the application of electromechanical brakes simplifies the overall vehicle braking structure.

[0004] However, existing electromechanical brakes have several problems in application. For example, the connection between the output wheel and the lead screw has several drawbacks. First, the connection uses a spline or gear meshing, which increases the connection difficulty and the number of parts. Second, the output wheel must be connected to the lead screw at the end furthest from the friction plate, resulting in a large axial space. Furthermore, this connection leads to an excessive force transmission distance, insufficient clamping force, and lingering during the clamping and releasing of the friction plate. Moreover, existing technologies suffer from numerous parts, high installation costs, difficulty in assembly, and a less compact internal structure, all of which are technical problems that need to be addressed by those skilled in the art. Summary of the Invention

[0005] One of the objectives of this invention is to overcome the shortcomings of the prior art and, in view of the above-mentioned problems existing in the vehicle braking system of the prior art, to provide an electromechanical brake actuator assembly, an electromechanical brake, and a vehicle.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] In a first aspect, the present invention provides an actuation assembly for an electromechanical brake, comprising a housing and a bracket, the bracket being connected to a first end of the housing, and an inner friction plate disposed near the housing and an outer friction plate disposed away from the housing mounted on the bracket;

[0008] The housing contains a drive mechanism, a transmission mechanism, and an actuator. The drive mechanism is arranged side by side on the side of the actuator. The transmission mechanism connects the drive mechanism and the actuator and transmits the output of the drive mechanism to the actuator.

[0009] The actuator includes a rotating component and an actuating component. The rotating component is rotatably connected to the outside of the actuating component and connected to the transmission mechanism. The actuating component is connected to the internal friction plate. The rotating component rotates around a first axis under the drive of the transmission mechanism and drives the actuating component to move along the first axis.

[0010] The actuating component includes a lead screw and a baffle, the baffle being fixedly connected to the lead screw and located between the lead screw and the internal friction plate;

[0011] The rotating assembly includes a nut, which is sleeved on the lead screw and rotatably connected to the lead screw; the nut includes a proximal end near the inner friction plate and a distal end away from the inner friction plate;

[0012] The transmission mechanism includes an output wheel, which is sleeved on the near end of the nut and fixedly connected to the nut. The output wheel drives the nut to rotate around the first axis, and the nut drives the lead screw to move along the first axis.

[0013] In a preferred embodiment of this application, the housing has an inner execution shell, which is cylindrical along the first axis and forms a first chamber. The inner execution shell is surrounded by a second chamber. The first chamber and the second chamber are connected at the first end. The execution mechanism is disposed in the first chamber and extends out of the first end. The drive mechanism and the transmission mechanism are disposed in the second chamber.

[0014] In a preferred embodiment of this application, the nut has a backstop protrusion, and the inner wall of the actuator housing has a backstop boss. The backstop protrusion is located between the backstop boss and the output wheel on the first axis, and there is a gap between the backstop protrusion and the backstop boss.

[0015] In a preferred embodiment of this application, the nut has a retaining ring, and the output wheel is fixedly connected to the nut via the retaining ring.

[0016] In a preferred embodiment of this application, an anti-wear member is provided between the nut and the inner housing, and the anti-wear member extends along the first axis.

[0017] In a preferred embodiment of this application, the lead screw and the baffle are fixed together by a screw, which passes through the baffle from the first end along the first axis and extends into the lead screw for fixing.

[0018] In a preferred embodiment of this application, the diameter of the baffle is greater than the diameter of the lead screw and less than the minimum outer diameter of the internal friction plate relative to the first axis.

[0019] In a preferred embodiment of this application, the driving mechanism includes a drive motor and a motor gear. The motor gear is mounted on the drive motor and has a second axis parallel to the first axis. The rotating component includes a lead screw nut. The transmission mechanism includes a planetary gear assembly, an intermediate gear assembly, and an output wheel. The planetary gear assembly is connected to the motor gear by tooth surface meshing. The motor gear and the planetary gear assembly are coaxially arranged on the second axis. The intermediate gear assembly is connected between the planetary gear assembly and the output wheel. The output wheel is sleeved on the lead screw nut and fixedly connected to the lead screw nut.

[0020] In a preferred embodiment of this application, the planetary gear assembly includes a planet carrier, a planet carrier shaft, a ring gear, and a plurality of planetary gears. The planet carrier is fixed between the drive motor and the housing on the second axis via the planet carrier shaft. The ring gear and the plurality of planetary gears are rotatably fixed in the planet carrier. The plurality of planetary gears mesh with the ring gear via tooth surfaces, and are connected to the motor gear via tooth surface meshing. The plurality of planetary gears are arranged around the motor gear, and the outer surface of the planet carrier is a tooth surface.

[0021] In a preferred embodiment of this application, the intermediate gear assembly includes an intermediate gear and an intermediate gear shaft. The intermediate gear is mounted on the housing via the intermediate gear shaft. The intermediate gear is connected between the planetary gear assembly and the output gear. The planetary gear assembly and the intermediate gear, as well as the intermediate gear and the output gear, are connected by tooth surface meshing.

[0022] In a preferred embodiment of this application, the motor gear extends from the drive motor toward the first end.

[0023] In a preferred embodiment of this application, a buffer is further provided between the housing and the rotating assembly, and the buffer is fixedly connected to the inner wall of the housing.

[0024] In a preferred embodiment of this application, the buffer and the housing are connected by an anti-rotation assembly.

[0025] In a preferred embodiment of this application, the anti-rotation component includes an anti-rotation protrusion and an anti-rotation groove, the anti-rotation groove extending axially, one of the anti-rotation protrusion and the anti-rotation groove being disposed on the buffer member, and the other being disposed on the housing.

[0026] In a preferred embodiment of this application, the buffer has an anti-rotation structure that extends into the actuating component. The actuating component can move relative to the buffer through the anti-rotation structure to prevent the actuating component from rotating around the first axis with the rotating component.

[0027] In a preferred embodiment of this application, an elastic pad is further provided between the buffer and the rotating assembly, and the elastic pad is clamped by the buffer and the rotating assembly on the first axis.

[0028] In a second aspect, the present invention provides an electromechanical brake, comprising the actuation assembly as described in the first aspect.

[0029] Thirdly, the present invention provides a vehicle including the electromechanical brake as described in the second aspect.

[0030] The electromechanical brake actuator assembly, electromechanical brake, and vehicle disclosed in this invention have advantages such as shorter axial space, greater clamping force on the brake disc, timely retraction of the lead screw during clamping and release with zero drag, more compact overall structure, and lower installation cost and assembly difficulty. In the electromechanical brake actuator assembly, electromechanical brake, and vehicle of this invention, since the output wheel is sleeved on the lead screw nut, driving the nut to rotate, and the lead screw to move linearly driven by the lead screw nut, the output wheel can be sleeved near the proximal end of the lead screw nut close to the inner friction plate. This arrangement has advantages not found in existing technologies: firstly, the output wheel is closer to the inner friction plate during use, resulting in a shorter force transmission distance and a greater output clamping force; secondly, the output wheel does not need to be connected to the lead screw near the distal end of the lead screw nut, thus the axial dimension of this invention is smaller. In this invention, the output wheel is directly sleeved on the lead screw nut without the need for other parts, which is easier to implement and requires fewer components compared to the method of connecting the output wheel to the lead screw. Since there is no need to install a transmission mechanism such as an output wheel at the far end of the nut, the space saved at this end can be used to install other functional components, such as circuit boards, force sensors, etc., which makes the product structure more flexible. Attached Figure Description

[0031] The present invention is described with reference to the following figures:

[0032] Figure 1 is a schematic diagram of an electromechanical brake installed in a vehicle according to an embodiment of the present invention;

[0033] Figure 2 is a schematic diagram of the execution assembly of an electromechanical brake according to an embodiment of the present invention;

[0034] Figure 3 is a cross-sectional view AA of Figure 2;

[0035] Figure 4 is a cross-sectional view of BB in Figure 2.

[0036] Reference numerals: 1-Electromechanical brake; 2-Wheel; 100-Housing; 101-First end; 102-Second end; 110-Actuating inner housing; 111-Anti-reverse boss; 112-Wear-resistant component; 120-First chamber; 130-Second chamber; 200-Bracket; 201-Return spring; 300-Inner friction plate; 400-Outer friction plate; 500-Drive mechanism; 510-Drive motor; 520-Motor gear; 600-Transmission mechanism; 610-Planetary gear assembly; 611-Planet carrier; 612-Planet carrier axle; 613-Ring gear; 614-Planet gear; 620-Intermediate gear assembly ; 621-Intermediate wheel; 622-Intermediate wheel shaft; 630-Output wheel; 700-Actuator; 710-Rotating assembly; 711-Threaded nut; 712-Anti-rotation protrusion; 713-Fixing ring; 720-Actuator assembly; 721-Threaded screw; 722-Baffle; 723-Screw; 800-Buffer; 901-Anti-rotation protrusion; 902-Anti-rotation groove; 903-Anti-rotation structure; X1-First axis; X2-Second axis. Detailed Implementation

[0037] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0038] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0039] As shown in Figure 1, an embodiment of the present invention discloses a vehicle including an electromechanical brake 1 disposed on four wheels 2. The electromechanical brake 1 includes an actuation assembly.

[0040] As shown in Figure 2, the electromechanical brake 1 of this embodiment includes a housing 100 and a bracket 200. The bracket 200 is connected to the first end 101 of the housing 100. An inner friction plate 300 is mounted on the bracket 200 near the housing 100, and an outer friction plate 400 is mounted away from the housing 100. A drive mechanism 500, a transmission mechanism 600, and an actuation mechanism 700 are disposed within the housing 100. The drive mechanism 500 is arranged side-by-side on the side of the actuation mechanism 700. The transmission mechanism 600 connects the drive mechanism 500 and the actuation mechanism 700 and transmits the output of the drive mechanism 500 to the actuation mechanism 700. The actuation mechanism 700 includes a rotating component 710 and an actuation component 720. The rotating component 710 is rotatably connected to the outside of the actuation component 720 and connected to the transmission mechanism 600. The actuation component 720 is connected to the inner friction plate 300. Under the drive of the transmission mechanism 600, the rotating component 710 rotates around a first axis X1 and drives the actuation component 720 to move along the first axis X1.

[0041] In the execution assembly of this embodiment, the housing 100 has an inner execution shell 110, which is cylindrical along the first axis X1 and forms a first chamber 120. A second chamber 130 is located outside the inner execution shell 110. The first chamber 120 and the second chamber 130 communicate at a first end 101. An execution mechanism 700 is disposed within the first chamber 120 and extends out of the first end 101. A drive mechanism 500 and a transmission mechanism 600 are disposed in the second chamber 130. The inner execution shell 110 defines the position and working space of the execution mechanism 700, ensuring that the rotating component 710 rotates strictly around the first axis X1 without deviation, and that the execution component 720 moves strictly along the first axis X1 with minimal deviation. The separation of the first chamber 120 and the second chamber 130 prevents interference between the drive mechanism 500 and the execution mechanism 700 during operation. Furthermore, in the execution assembly of this embodiment, components such as the motor mounting housing 100 and gear transmission cage required for a separate electronic actuator are eliminated, reducing installation costs and component assembly difficulty.

[0042] In the execution assembly of this embodiment, the drive mechanism 500 includes a drive motor 510 and a motor gear 520, with the motor gear 520 mounted on the drive motor 510. The transmission mechanism 600 includes a planetary gear assembly 610, an intermediate gear assembly 620, and an output gear 630, with the intermediate gear assembly 620 connected between the planetary gear assembly 610 and the output gear 630. In the execution mechanism 700, the rotating component 710 includes a lead screw 711, and the execution component 720 includes a lead screw 721 and a baffle 722, with the baffle 722 fixedly connected to the lead screw 721 and located between the lead screw 721 and the internal friction plate 300.

[0043] In the drive mechanism 500, the drive motor 510 can be a linear motor or a brushless DC motor. The motor gear 520 has a second axis X2, which is parallel to the first axis X1, thus facilitating the arrangement of the planetary gear assembly 610, the intermediate gear assembly 620, and the output gear 630 in the transmission mechanism 600. The motor gear 520 extends from the drive motor 510 toward the first end 101.

[0044] In the transmission mechanism 600, the planetary gear assembly 610 and the motor gear 520 are connected by tooth surface meshing, and the planetary gear assembly 610 and the motor gear 520 are coaxially arranged on the second axis X2. The planetary gear assembly 610 includes a planet carrier 611, a planet carrier shaft 612, a ring gear 613, and a plurality of planet gears 614. The planet carrier 611 is fixed between the drive motor 510 and the housing 100 on the second axis X2 via the planet carrier shaft 612. The ring gear 613 and the plurality of planet gears 614 are rotatably fixed in the planet carrier 611. The motor gear 520 is the sun gear of the plurality of planet gears 614. The plurality of planet gears 614 are connected to the ring gear 613 by tooth surface meshing, and the plurality of planet gears 614 are connected to the motor gear 520 by tooth surface meshing. The plurality of planet gears 614 are arranged around the motor gear 520, and the outer surface of the planet carrier 611 is a tooth surface. The intermediate gear assembly 620 includes an intermediate gear 621 and an intermediate gear shaft 622. The intermediate gear 621 is mounted on the housing 100 via the intermediate gear shaft 622. The intermediate gear 621 is connected between the planetary gear assembly 610 and the output gear 630. The planetary gear assembly 610 and the intermediate gear 621, as well as the intermediate gear 621 and the output gear 630, are connected by tooth surface meshing. The output gear 630 is sleeved on the nut 711 and fixedly connected to it. The function of the transmission mechanism 600 is to reduce speed and increase torque. The first stage of speed reduction and torque increase is achieved through the planetary gears 614 and the ring gear 613. The second stage of speed reduction and torque increase is achieved through the tooth surfaces of the planetary carrier 611, the intermediate gear 621, and the output gear 630. Finally, the output gear 630 drives the nut 711 to rotate. In the execution assembly of this embodiment, the output wheel 630 and the lead screw 711 are directly fixedly connected and rotated together, replacing the spline connection between the electronic actuator 700 and the lead screw 721 in the prior art. This can effectively prevent the spline breakage problem under high torque, solve the bottleneck of the transmission mechanism 600 when transmitting high torque, and thus realize the design of large clamping force.

[0045] In the actuator 700, the lead screw 711 only rotates. The lead screw 711 is sleeved around and rotatably connected to the lead screw 721. The output wheel 630 drives the lead screw 711 to rotate around the first axis X1, and the lead screw 721 moves along the first axis X1. The lead screw 711 has a backstop protrusion 712 and a retaining ring 713. The inner wall of the actuator housing 110 has a backstop boss 111. On the first axis X1, the backstop protrusion 712 is located between the backstop boss 111 and the output wheel 630, with a gap between them. The output wheel 630 is fixedly connected to the lead screw 711 via the retaining ring 713. A wear-resistant component 112 is provided between the lead screw nut 711 and the inner housing 110. The wear-resistant component 112 extends along the first axis X1 and can be an oil-impregnated bearing, which can improve the rotational life of the lead screw nut 711 and reduce its wear. The lead screw 721 is fixed to the baffle 722 by a screw 723. The screw 723 passes through the baffle 722 from the first end 101 along the first axis X1 and extends into and is fixed in the lead screw 721. When the baffle on the lead screw 721 extends, it drives the inner friction plate 300 forward to achieve clamping. When the lead screw 721 and the baffle 722 retract, they drive the inner friction plate 300 to retract to achieve release. The diameter of the baffle 722 is larger than the diameter of the lead screw 721 but smaller than the minimum outer diameter of the inner friction plate 300 relative to the first axis X1. The baffle 722 and the inner friction plate 300 can be connected as a single unit or simply have a contact relationship. When the baffle 722 and the inner friction plate 300 are in contact, the forces exerted by the lead screw 721 to push the baffle 722 and to pull the baffle 722 back can be instantly responded to the inner friction plate 300, but the retraction stroke of the lead screw 721 will be limited. When the baffle 722 abuts against the inner friction plate 300, the inner friction plate 300 is activated by the return spring 201 provided on the bracket 200. The release is achieved by active return. The force of the lead screw 721 extending to push the baffle 722 and retracting to pull the baffle 722 may have a certain delay, but the retraction stroke of the lead screw 721 is not limited. In both cases, since the piston design is eliminated in the actuator 700, the clamping and release action is directly achieved by the extension and retraction of the lead screw 721. The baffle 722 is fixed on the lead screw 721. When the lead screw 721 retracts, it can directly pull the baffle back, thereby achieving zero drag.

[0046] In this embodiment, the working methods of the original lead screw 721 and lead nut 711 are interchanged. The lead screw 721, which is sleeved outside the lead screw 721, rotates around the first axis X1 to drive the more internal lead screw 721 to move linearly along the first axis X1. This allows the transmission mechanism 600, which has a deceleration and torque-increasing function, to be arranged in the overlapping section of the lead screw 721. This makes excellent use of the axial space of the execution assembly, shortens the axial length of the housing 100 between its two ends on the first axis X1, and makes the internal structure of the housing 100 compact, suitable for situations where the chassis brake has very little installation space. Even with very little space available at the wheel 2, interference between the electromechanical brake 1 and components such as the control arm, positioning arm, shock absorber, and steering tie rod can be prevented in extreme space conditions.

[0047] A buffer member 800 is also provided between the housing 100 and the rotating assembly 710. The buffer member 800 is fixedly connected to the inner wall of the housing 100, which can also be the inner wall of the inner shell 110. The buffer member 800 is connected to the housing 100 via an anti-rotation assembly, as shown in Figure 3. The anti-rotation assembly includes an anti-rotation protrusion 901 and an anti-rotation groove 902. The anti-rotation groove 902 extends axially. One of the anti-rotation protrusion 901 and the anti-rotation groove 902 is disposed on the buffer member 800, and the other is disposed on the housing 100. In this embodiment, the anti-rotation protrusion 901 is a structure protruding from the outer wall of the buffer member 800, and the anti-rotation groove 902 is a recess in the housing 100 that is opened from the inner wall of the inner shell 110 and corresponds to the anti-rotation protrusion 901. An elastic gasket is also provided between the buffer member 800 and the rotating assembly 710. The elastic gasket is held by the buffer member 800 and the rotating assembly 710 on the first axis X1. The buffer 800 has an anti-rotation structure 903, which extends into the actuation component 720. The actuation component 720 can move relative to the buffer 800 through the anti-rotation structure 903. In this embodiment, the anti-rotation structure 903 extends into the lead screw 721, as shown in Figure 4, thereby preventing the actuation component 720 from rotating around the first axis X1 with the rotating component 710. The anti-rotation structure 903 is an elliptical cylinder into which the buffer 800 is inserted into the actuation component 720.

[0048] In this embodiment, the electromechanical brake 1's actuator assembly uses a drive motor 510 to drive a reduction transmission mechanism 600 composed of a planetary gear 614, a ring gear 613, an intermediate gear 621, and an output gear 630 to transmit torque. This torque then drives a ball screw pair composed of a lead screw nut 711 and a lead screw 721. The rotation of the lead screw nut 711 causes the lead screw 721 to extend and retract, thus releasing the clamping force between the inner friction plate 300 and the outer friction plate 400 on the brake disc. The first advantage is that the output gear 630 of the transmission mechanism 600 is directly connected to the lead screw 721, eliminating the need for the conventional spline connection used in the prior art and effectively avoiding spline breakage due to insufficient force. The second advantage is that the clamping release achieved through the extension and retraction of the lead screw 721 easily achieves zero drag. The third advantage is that arranging the drive mechanism 500, the transmission mechanism 600, and the actuator 700 within the housing 100 effectively reduces the axial space without increasing the radial dimension.

[0049] The electromechanical brake actuator assembly, electromechanical brake and vehicle disclosed in this invention have advantages such as shorter axial space, greater clamping force on the brake disc, timely retraction of the lead screw to achieve zero drag during clamping and release, more compact overall structure, and lower installation cost and assembly difficulty.

[0050] It should be understood that the above description of specific embodiments of the present invention is only for illustrating the technical approach and features of the present invention, and is intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of the present invention should be covered within the protection scope of the present invention.

Claims

1. An actuator assembly for an electromechanical brake, characterized in that, It includes a housing and a bracket, the bracket being connected to a first end of the housing, and an inner friction plate disposed near the housing and an outer friction plate disposed away from the housing mounted on the bracket; The housing contains a drive mechanism, a transmission mechanism, and an actuator. The drive mechanism is arranged side by side on the side of the actuator. The transmission mechanism connects the drive mechanism and the actuator and transmits the output of the drive mechanism to the actuator. The actuator includes a rotating component and an actuating component. The rotating component is rotatably connected to the outside of the actuating component and connected to the transmission mechanism. The actuating component is connected to the internal friction plate. The rotating component rotates around a first axis under the drive of the transmission mechanism and drives the actuating component to move along the first axis. The actuating component includes a lead screw and a baffle, the baffle being fixedly connected to the lead screw and located between the lead screw and the internal friction plate; The rotating assembly includes a nut, which is sleeved on the lead screw and rotatably connected to the lead screw; the nut includes a proximal end near the inner friction plate and a distal end away from the inner friction plate; The transmission mechanism includes an output wheel, which is sleeved on the near end of the nut and fixedly connected to the nut. The output wheel drives the nut to rotate around the first axis, and the nut drives the lead screw to move along the first axis.

2. The actuator assembly of the electromechanical brake according to claim 1, characterized in that, The housing has an inner execution shell, which is cylindrical along the first axis and forms a first chamber. The inner execution shell is surrounded by a second chamber. The first chamber and the second chamber are connected at the first end. The execution mechanism is disposed in the first chamber and extends out of the first end. The drive mechanism and the transmission mechanism are disposed in the second chamber.

3. The actuator assembly of the electromechanical brake according to claim 2, characterized in that, The nut has a backstop protrusion, and the inner wall of the actuator housing has a backstop boss. On the first axis, the backstop protrusion is located between the backstop boss and the output wheel, and there is a gap between the backstop protrusion and the backstop boss.

4. The actuator assembly of the electromechanical brake according to claim 3, characterized in that, The nut has a retaining ring, and the output wheel is fixedly connected to the nut through the retaining ring.

5. The actuator assembly of the electromechanical brake according to claim 3, characterized in that, A wear-resistant component is provided between the nut and the inner housing, and the wear-resistant component extends along the first axis.

6. The actuator assembly of the electromechanical brake according to claim 1, characterized in that, The lead screw is fixed to the baffle by a screw, which passes through the baffle from the first end along the first axis and extends into the lead screw for fixing.

7. The actuator assembly of the electromechanical brake according to claim 1, characterized in that, The diameter of the baffle is greater than the diameter of the lead screw and less than the minimum outer diameter of the internal friction plate relative to the first axis.

8. The actuator assembly of the electromechanical brake according to claim 1, characterized in that, The driving mechanism includes a drive motor and a motor gear. The motor gear is mounted on the drive motor and has a second axis parallel to the first axis. The rotating component includes a lead screw nut. The transmission mechanism includes a planetary gear assembly, an intermediate gear assembly, and an output wheel. The planetary gear assembly is connected to the motor gear by tooth surface meshing. The motor gear and the planetary gear assembly are coaxially arranged on the second axis. The intermediate gear assembly is connected between the planetary gear assembly and the output wheel. The output wheel is sleeved on the lead screw nut and fixedly connected to the lead screw nut.

9. The actuator assembly of the electromechanical brake according to claim 8, characterized in that, The planetary gear assembly includes a planet carrier, a planet carrier shaft, a ring gear, and multiple planetary gears. The planet carrier is fixed between the drive motor and the housing on the second axis via the planet carrier shaft. The ring gear and the multiple planetary gears are rotatably fixed in the planet carrier. The multiple planetary gears are meshed with the ring gear via tooth surfaces, and the multiple planetary gears are connected to the motor gear via tooth surface meshing. The multiple planetary gears are arranged around the motor gear, and the outer surface of the planet carrier is a tooth surface.

10. The actuator assembly of the electromechanical brake according to claim 8, characterized in that, The intermediate gear assembly includes an intermediate gear and an intermediate gear shaft. The intermediate gear is mounted on the housing via the intermediate gear shaft. The intermediate gear is connected between the planetary gear assembly and the output gear. The planetary gear assembly and the intermediate gear, as well as the intermediate gear and the output gear, are connected by tooth surface meshing.

11. The actuator assembly of the electromechanical brake according to claim 8, characterized in that, The motor gear extends from the drive motor toward the first end.

12. The actuator assembly of the electromechanical brake according to claim 1, characterized in that, A buffer element is also provided between the housing and the rotating assembly, and the buffer element is fixedly connected to the inner wall of the housing.

13. The actuator assembly of the electromechanical brake according to claim 12, characterized in that, The buffer is connected to the housing via an anti-rotation assembly.

14. The actuator assembly of the electromechanical brake according to claim 13, characterized in that, The anti-rotation component includes an anti-rotation protrusion and an anti-rotation groove, the anti-rotation groove extending axially, one of the anti-rotation protrusion and the anti-rotation groove being disposed on the buffer member, and the other being disposed on the housing.

15. The actuator assembly of the electromechanical brake according to claim 14, characterized in that, The buffer has an anti-rotation structure that extends into the actuation component. The actuation component can move relative to the buffer through the anti-rotation structure to prevent the actuation component from rotating around the first axis with the rotating component.

16. The actuator assembly of the electromechanical brake according to claim 14, characterized in that, An elastic pad is also provided between the buffer and the rotating assembly, and the elastic pad is clamped by the buffer and the rotating assembly on the first axis.

17. An electromechanical brake, characterized in that, Includes the execution assembly as described in any one of claims 1-16.

18. A vehicle, characterized in that, Including the electromechanical brake as described in claim 17.

Images