Electromechanical brake and locking device for the same

Abstract

To provide an electromechanical brake, and a locking device for the same.SOLUTION: The locking device includes: a bracket; a rotating lever 81 that has an operating end 811 for being interlocked with a ratchet 33 of the electromechanical brake, the rotating lever being connected to the bracket through a rotating shaft, so that the rotating lever is capable of rotating between an idle position and a working position with the rotating shaft being a rotation axis; and an electromagnet 82 acting on an action end of the rotating lever, thereby causing the rotating lever to rotate from the idle position to the working position.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to the field of vehicle braking systems, and more particularly to electromechanical brakes and locking devices therefor. [Background technology]

[0002] Electromechanical brakes are devices that utilize an electric motor to actuate the brake caliper for braking. Compared with traditional hydraulic brake systems, electromechanical brakes offer advantages such as quick response, simple structure, and ease of maintenance. With the development of vehicle electrification and vehicle intelligence, electromechanical brakes have become a trend in the development of braking systems due to their integration with electric control systems. Since electromechanical brakes are located inside the vehicle hub, it is a challenge to balance compactness and functionality in the design of electromechanical brakes.

[0003] In a conventional hydraulic brake system, the hydraulic pressure in the brake cylinder is maintained by a hand brake or a foot brake, thereby realizing a parking brake. For an electromechanical brake, a parking lock device is generally configured to achieve the parking brake function, for example, a pin driven by an electromagnetic actuator interferes with a transmission mechanism to lock the brake, but such a system requires that the electromagnetic actuator remains powered on when the vehicle is parked, which may lead to brake parking failure when the electromagnetic actuator fails. Summary of the Invention [Problem to be solved by the invention]

[0004] The present application aims to solve or at least alleviate the problems existing in the prior art. [Means for solving the problem]

[0005] In one aspect, a locking device for an electromechanical brake is provided, the locking device comprising: A bracket and a rotating lever, the rotating lever having an operating end for interlocking with a ratchet of an electromechanical brake, the rotating lever being connected to the bracket through a rotating shaft, so that the rotating lever can rotate between an idle position and a working position having the rotating shaft as a rotation axis; an electromagnet acting on an operating end of the rotary lever, thereby rotating the rotary lever from an idle position to a working position; a reset member that returns the rotary lever from the working position to the idle position; The locking device is configured such that the travel distance c of the working end of the rotating lever is more than three times the travel distance d of the working end during movement of the rotating lever from the idle position to the working position, and optionally, the travel distance c of the working end of the rotating lever is more than five times the travel distance d of the working end.

[0006] Optionally, in one embodiment of the locking device, the working end is located on a first side of the rotating shaft, and the rotating lever further includes a counterweight portion located on a second side of the rotating shaft opposite the first side, such that the center of gravity of the rotating lever is near the rotating shaft.

[0007] Optionally, in one embodiment of the locking device, the distance from the center of gravity of the rotating lever to the rotating shaft is less than 1 cm.

[0008] Optionally, in one embodiment of the locking device, the counterweight portion is disposed on the working end, or the rotating lever comprises a first arm, a second arm, and a third arm extending along three directions from the shaft hole, and the ends of the first arm, the second arm, and the third arm are configured as the working end, the working end, and the counterweight portion, respectively.

[0009] Optionally, in one embodiment of the locking device, the working end, the acting end, and / or the counterweight portion have an axially extending extension.

[0010] Optionally, in one embodiment of the locking device, a maximum distance of the working end to the rotating shaft is more than three times a maximum distance from the counterweight portion to the rotating shaft.

[0011] Optionally, in one embodiment of the locking device, a maximum distance of the working end to the rotating shaft is more than five times a maximum distance from the counterweight portion to the rotating shaft.

[0012] Optionally, in one embodiment of the locking device, the bracket is a separate locking device housing, the rotating lever is connected to the locking device housing through a rotating shaft, and the locking device housing comprises a first cavity for accommodating the electromagnet and a second cavity for accommodating the rotating shaft, the rotating lever, and the reset member.

[0013] Optionally, in one embodiment of the locking device, the first cavity is configured to match the shape of the electromagnet, and the first cavity and the second cavity are separated by an intermediate wall, the intermediate wall having a hole that allows the active end of the electromagnet to pass through.

[0014] Optionally, in one embodiment of the locking device, the second cavity comprises opposing walls, and the rotating shaft is connected to a mounting hole in the opposing walls.

[0015] Optionally, in one embodiment of the locking device, a rotating lever is disposed on the rotating shaft in a screening mode, and a washer is disposed between the rotating lever and an opposing wall to axially restrict the rotating lever.

[0016] Optionally, in one embodiment of the locking device, the reset member is a folding spring, mounted on a pin extending from the opposing wall.

[0017] Optionally, in one embodiment of the locking device, the folding spring comprises a first end connected to the first pin, a bend that bypasses the second pin, and a second end connected to the rotating lever.

[0018] Optionally, in one embodiment of the locking device, the locking device further comprises a banking pin extending from the opposing wall, the banking pin configured to restrain the rotating lever when the rotating lever returns from the working position to the idle position.

[0019] Optionally, in one embodiment of the locking device, the banking pin is wrapped with a cushion collar.

[0020] Optionally, in one embodiment of the locking device, the bracket forms an end cap of a main module of the electromechanical brake, the end cap having an additional accommodating cavity for accommodating an electromagnet, the electromagnet being disposed in the additional accommodating cavity.

[0021] Optionally, in one embodiment of the locking device, one end of a rotating shaft of the rotating lever is disposed in a hole in the end cap, the rotating lever is rotatably fixed to the rotating shaft, and the reset member is a torsion spring disposed on the rotating shaft, a first end of the torsion spring abuts against a hook portion of the rotating lever, and a second end of the torsion spring is fixed.

[0022] In another aspect, there is also provided an electromechanical brake, the electromechanical brake comprising: A brake motor; a spindle coupled to a brake motor, the spindle being driven by the brake motor to rotate along a first direction to drive the brake module to perform a braking action, the ratchet being fixedly disposed on the spindle; A locking device according to various embodiments, comprising: a locking device, the operating end of which is disengaged from the ratchet when a rotating lever of the locking device is in an idle position, and the operating end of which is engaged with the ratchet when the rotating lever of the locking device is in a working position; The ratchet and rotatable lever are arranged such that, when in the working position, the operating end interacts with the ratchet to prevent the ratchet from rotating in a second direction opposite the first direction and to prevent the rotatable lever from rotating toward the idle position.

[0023] Optionally, in an embodiment of the electromechanical brake, the spindle has a front end and an opposite rear end, the front end of the spindle is coupled to the brake module through a ball screw nut mechanism, the ratchet is fixedly mounted on the rear end of the spindle, and the worm gear is fixedly disposed in an intermediate section between the front and rear ends of the spindle.

[0024] Optionally, in an electromechanical brake embodiment, the output shaft of the brake motor is configured as a worm that meshes with a worm gear on the spindle.

[0025] Optionally, in one embodiment of the electromechanical brake, the electromechanical brake comprises a brake motor, a main module, a brake module and an electronic control unit, the main module comprises a main housing and an end cap, the spindle, the ball screw nut mechanism, the ratchet, the worm gear and the locking device are housed between the main housing and the end cap, a first end of the main housing is connected to the brake module, a second end of the main housing opposite to the first end is closed by the first end, and the brake motor and the electronic control unit are connected to the main housing from two opposite sides of the main housing.

[0026] Optionally, in one embodiment of the electromechanical brake, the locking device is pre-assembled and then attached to the main housing.

[0027] Optionally, in an embodiment of the electromechanical brake, the locking device housing of the locking device comprises a restrictive feature that mates with the main housing, and the locking device housing further comprises a bolt hole for connection with a bolt passing through a wall of the main housing.

[0028] Optionally, in an embodiment of the electromechanical brake, the electromechanical brake further comprises an adapter attached to the main housing, the electronic control unit being electrically connected to the electromagnet and the brake motor, respectively, through the adapter, the electromagnet having terminals connected to the adapter, the terminals facing the adapter, or the terminals facing the end cap.

[0029] The electromechanical brake according to the embodiment of the present invention has a more compact structure and is more convenient to assemble. [Brief description of the drawings]

[0030] The contents disclosed in the present application can be more easily understood with reference to the attached drawings. Those skilled in the art can easily understand that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present application. Additionally, like numerals in the drawings are used to represent similar components.

[0031] [Figure 1] FIG. 1 shows an exploded view of an electromechanical brake according to an embodiment when assembled to a hub. [Diagram 2] FIG. 2 shows an exploded view of an electromechanical brake according to a first embodiment of the invention. [Diagram 3] FIG. 3 shows an exploded view of an electromechanical brake according to a first embodiment of the invention. [Figure 4] FIG. 4 shows a schematic diagram of an electromechanical brake according to an embodiment of the present invention. [Diagram 5] FIG. 5 shows an exploded view of an end cap and locking device according to a first embodiment of the present invention. [Figure 6] FIG. 6 shows a three-dimensional view of a rotating lever according to a first embodiment of the invention. [Figure 7] FIG. 7 shows an assembly view of an end cap and locking device according to a first embodiment of the present invention. [Figure 8] FIG. 8 shows an exploded view of a locking device according to a first embodiment of the present invention. [Figure 9] FIG. 9 shows a three-dimensional view of the electromechanical brake according to a first embodiment of the present invention with the end caps removed. [Figure 10] FIG. 10 shows a front view and a three-dimensional view, respectively, of a locking device according to a first embodiment of the invention in an idle state. [Figure 11] FIG. 11 shows a front view and a three-dimensional view, respectively, of a locking device according to a first embodiment of the invention in an idle state. [Figure 12] FIG. 12 shows a front view of a locking device according to a first embodiment of the invention during transition from an idle state to a working state. [Figure 13] FIG. 13 shows a front view of a locking device according to a first embodiment of the invention in an operational state. [Figure 14] FIG. 14 shows partial design dimensions of a locking device according to a first embodiment of the present invention. [Figure 15] FIG. 15 shows a schematic diagram of an end cap assembly of an electromechanical brake according to a first embodiment of the present invention when the end caps are assembled. [Figure 16] FIG. 16 shows a schematic diagram of the electronic control unit of the electromechanical brake according to the first embodiment of the invention when assembled. [Figure 17] FIG. 17 shows a perspective view of an electromechanical brake according to a second embodiment of the present invention. [Figure 18] FIG. 18 shows a partial exploded view of an electromechanical brake according to a second embodiment of the present invention. [Figure 19] FIG. 19 shows a three-dimensional view of the end caps and locking device of an electromechanical brake according to a second embodiment of the present invention. [Figure 20] FIG. 20 is an exploded view of an end cap and locking device for an electromechanical brake according to a second embodiment of the present invention. [Figure 21] FIG. 21 shows a three-dimensional view of a rotating lever according to a second embodiment of the invention. [Figure 22] FIG. 22 shows front and rear views, respectively, of a locking device according to a second embodiment of the invention in an idle state. [Diagram 23] FIG. 23 shows front and rear views, respectively, of a locking device according to a second embodiment of the invention in an idle state. [Figure 24] FIG. 24 shows a three-dimensional view and a front view, respectively, of a locking device according to a second embodiment of the invention in an idle state. [Diagram 25] FIG. 25 shows a three-dimensional view and a front view, respectively, of a locking device according to a second embodiment of the invention in an idle state. [Figure 26] FIG. 26 shows a schematic diagram of the end caps of an electromechanical brake according to a second embodiment of the present invention when assembled. [Figure 27] FIG. 27 shows a schematic diagram of an electromechanical brake according to a second embodiment of the invention when assembled. [Figure 28] FIG. 28 shows a three-dimensional view of an electromechanical brake according to a third embodiment of the invention. [Figure 29] FIG. 29 shows a partial exploded view of an electromechanical brake according to a third embodiment of the present invention. [Diagram 30] FIG. 30 shows a three-dimensional view of the end caps and locking device of an electromechanical brake according to a third embodiment of the present invention. [Diagram 31] FIG. 31 shows a three-dimensional view of a locking device according to a third embodiment of the present invention. [Diagram 32] FIG. 32 is an exploded view of an end cap and locking device for an electromechanical brake according to a third embodiment of the present invention. [Diagram 33] FIG. 33 shows a three-dimensional view of a pivot pin according to a third embodiment of the present invention. [Diagram 34] FIG. 34 shows a three-dimensional view of a main housing according to a third embodiment of the present invention, and a close-up view of the pivot pins with their respective holes therein. [Diagram 35]FIG. 35 shows a three-dimensional view of a main housing according to a third embodiment of the present invention, and a close-up view of the pivot pins with their respective holes therein. [Diagram 36] FIG. 36 shows a three-dimensional view of an adapter for an electromechanical brake according to a third embodiment of the present invention. [Figure 37] FIG. 37 shows a three-dimensional view of an electromechanical brake according to a fourth embodiment of the present invention. [Figure 38] FIG. 38 shows an exploded view of an electromechanical brake according to a fourth embodiment of the present invention. [Figure 39] FIG. 39 is an exploded view of a locking device for an electromechanical brake according to a fourth embodiment of the present invention. [Diagram 40] FIG. 40 is an assembly diagram of a locking device for an electromechanical brake according to a fourth embodiment of the present invention. [Diagram 41] FIG. 41 shows different angle views of a locking device and main housing according to a fourth embodiment of the present invention when assembled. [Diagram 42] FIG. 42 shows different angle views of a locking device and main housing according to a fourth embodiment of the present invention when assembled. [Diagram 43] FIG. 43 shows a locking device when assembled according to a fourth embodiment of the present invention. [Diagram 44] FIG. 44 shows a diagram of an electromagnet and its assembly according to an alternative embodiment. [Diagram 45] FIG. 45 shows a diagram of an electromagnet and its assembly according to an alternative embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] 1 is an installation diagram of an electromechanical brake, showing a rotating shaft 97, a damper 92, a bearing 94, a steering knuckle arm 93, a brake disc 95 and a wheel 96, and an electromechanical brake 100 according to one embodiment, which is driven by a motor and provides braking force by clamping the brake disc 95 with a brake caliper. The electromechanical brake 100 is mounted on the steering knuckle arm 93 during assembly, while the electromechanical brake 100 is further housed in a compact space on the inner side of the hub of the wheel 96.

[0033] An electromechanical brake 100 according to a first embodiment of the present invention will be described with reference to Figures 2-16. The electromechanical brake 100 adopts a modular design and generally includes a brake motor 1, a main module 3, a brake caliper module 5, and an electronic control unit 4. A spindle 301 coupled with the brake motor 1 is included in the main module 3, and the direction along which the spindle 301 runs in this specification is defined as an axial direction. The spindle 301 is driven by the brake motor 1 to rotate along a first direction to drive the brake caliper module 5 to perform a braking operation, i.e., to rub against the brake disc 95, and the ratchet 33 is fixedly disposed on the spindle 301.

[0034] Referring to FIG. 4, the spindle 301 comprises a front end 302 and a rear end 303. The front end 302 of the spindle 301, i.e. the end close to the brake caliper module 5, forms a lead screw of the ball screw nut mechanism 304, and the ratchet 33 is arranged at the rear end 303 of the spindle 301, i.e. the end far from the brake caliper module 5. The central part of the spindle 301 (at a position between the front end and the rear end) may be provided with a worm gear 32 for receiving torque from the brake motor 1, and at least a part of the section of the output shaft 11 of the brake motor 1 may be configured as a worm 11, the output shaft being oriented to cross the axial direction and meshing with the worm gear 32 for transmitting torque (FIG. 9). Alternatively, the brake motor 1 may also drive the spindle 301 through a gear. The spindle 301 is driven by the brake motor 1 to rotate along a first direction, driving the plunger 305 to move through the ball screw nut mechanism 304, so that the brake caliper module 5 grips the brake disc 95 to perform the braking function.

[0035] In another embodiment, the locking device 8 is also provided to match with the ratchet 33 to achieve a parking brake function. The locking device includes a rotating lever 81, the rotating lever 81 having an operating end 811, which can be rotated between an idle position where the operating end 811 is separated from the ratchet (as shown in Figs. 10 and 11) and a working position where the operating end 811 is engaged with the ratchet (Fig. 13), an actuating member, and a reset member, the actuating member rotates the rotating lever from the idle position to the working position, and the reset member returns the rotating lever from the working position to the idle position. Therein, the ratchet and the operating end of the rotating lever are arranged such that the operating end 811 interferes with the ratchet 33 in the working position to prevent the ratchet 33 from rotating in a second direction opposite to the first direction, and prevents the rotating lever 81 from returning to the idle position.

[0036] In some embodiments, the main module 3 of the electromechanical brake includes a main housing 31 and an end cap 39, a first end of the main housing 31 is connected to the brake caliper module 5, and a second end of the main housing 31 opposite to the first end is closed by the end cap 39. The spindle 301, the ratchet 33, the worm gear 32, the locking device 8, etc. are included in the space between the main housing 31 and the end cap 39. In a first embodiment, the locking device 8 is disposed in the end cap 39. Specifically, referring to FIG. 5, in some embodiments, the end cap 39 includes a body portion (lower portion) that is generally used to cover the ratchet position in the main housing, and an additional portion (upper portion) that is generally used to cover the worm position in the main housing, and the additional portion of the end cap has an additional receiving cavity 391 that includes the actuating member of the locking device 8, and in this example, the actuating member is an electromagnet 82, which is disposed in the additional receiving cavity 391 of the end cap. In this embodiment, the rotating shaft 83 of the rotating lever 81 is connected between the hole 392 in the end cap and a hole (not shown in the figures) at a corresponding position in the main housing, and the rotating lever 81 is rotatably fixed to the rotating shaft 83, e.g., the rotating shaft 83 passes through a shaft hole 810 in the rotating lever 81. In the particular example shown in Figure 8, the rotating lever 81 is axially positioned on the rotating shaft 83 through slots 831, 832 on the rotating shaft 83 and corresponding fastening rings 833, 834, while the opposing ends 835, 836 of the rotating shaft 83 are interference-fitted into holes in the end cap 39 and the main housing 31, respectively. In this embodiment, the reset member is a torsion spring 84 disposed on the rotating shaft 83 and connected to the rotating lever 81.

[0037] 7, a first end 841 of the torsion spring 84 abuts against the hook portion 817 of the rotating lever 81, and the other end 842 of the torsion spring is fixed, for example, abuts against a first protruding portion 394 on the end cap, and the torsion spring 84 is pre-compressed or pre-tensioned, thereby providing a resetting elastic force. Furthermore, a second protruding portion 393 is also provided on the end cap having the function of restricting the rotating lever 81 when the rotating lever is reset by the elastic member, and in some embodiments, the second protruding portion 393 may be wrapped with a cushioning material to provide cushioning and reduce bumping noise.

[0038] In some embodiments, the working end 819 of the rotating lever 81 extends axially so as to be used to contact and receive power from an actuating mechanism, such as the execution end 821 of an electromagnet 82 (FIG. 8). In a first embodiment, the rotating lever 81 is in the same plane as the ratchet 33, located approximately on one side of the ratchet closer to the worm of the brake motor, and the rotating lever 81 receives rotational power by means of the working end 819 extending axially.

[0039] 10-13, the ratchet 33 rotates with the spindle 301 in a first plane, the rotating lever 81 is arranged to rotate in the first plane, and in the idle position, the rotating lever 81 is located on the radially outer side (worm side) of the ratchet 33, and the latches 331 of the ratchet 33 are located on the periphery of the ratchet 33. In some embodiments, the working end 811 is configured as a hook portion, and in the working position, the hook portion of the working end 811 hooks one of the latches 331 on the periphery of the ratchet, thereby achieving interlocking. 13 as an example, the counterclockwise direction corresponds to the first direction in which the ratchet 33 rotates when the brake motor 1 is driven, and when the brake motor 1 stops working, the ratchet 33 tends to rotate in a second direction opposite to the first direction (clockwise in FIG. 13), and the latch 331 locks with the hook portion of the operating end 811, thereby achieving interlocking, and at this time, even if the electromagnet 82 is turned off, that is, its execution end 821 retreats, the latch 331 and the operating end 811 cannot retreat. Conversely, when the ratchet 33 rotates again along the first direction (counterclockwise in FIG. 13) under the action of the brake motor 1, the latch 331 guides the rotating lever 81 to rotate toward the idle position under the reset elastic force of the torsion spring 84, thereby releasing both the rotating lever 81 and the ratchet 33.

[0040] Referring to FIG. 3, the electromechanical brake according to the present invention adopts a modular design, and includes a main module 3 and a brake caliper module 5 mounted on the distal end of the main module 3, and a fastening nut 61 and a seal ring 62 are disposed therebetween. The main module 3 includes a main housing 31 and an end cap 39, and the main housing 31 includes a spindle 301, a ball screw nut mechanism 304, a ratchet 33, a worm gear 32, a locking device 8, etc. A first end 311 of the main housing 31 is connected to the brake caliper module 5, and a second end 312 of the main housing 31 opposite to the first end is closed by the end cap 39. The brake motor 1 and the electronic control unit 4 are integrated on both sides of the main module 3, such as a first side 313 and a second side 314. It can be seen that the operation of the electromagnet 82 of the brake motor 1 and the locking mechanism 8 is controlled by the electronic control unit 4. Specifically, as shown in FIG. 4, the brake motor 1 and the electromagnet 82 are connected to the electronic control unit 4. In the parking brake control, upon receiving a parking brake signal, the electronic control unit 4 controls the brake motor 1 to rotate the spindle 301 along a first direction, thereby driving the brake caliper module 5 to establish a predetermined brake torque even when the brake caliper clamps the brake disc 95. The electronic control unit 4 then controls the electromagnet 82 to act on the rotating lever 81 to rotate from the idle position to the working position, and at this time, the hook portion of the operating end of the rotating lever 81 does not necessarily need to coincide with the gap between the latches 331 of the ratchet 33 (for example, FIG. 12), and the brake motor 1 is controlled to rotate slightly (for example, by one tooth) along the second direction, thereby moving the operating end 811 of the rotating lever to the working position so as to mesh with the latches 331 of the ratchet 33 as shown in FIG. 13, and at this time, the energization to the electromagnet 82 and the brake motor 1 may be turned off.Because the rotating lever 81 interlocks with the ratchet 33, the brake caliper module 5 can hold the brake torque even when the electromagnet 82 and the brake motor 1 are powered off, so that in the parking brake state of the vehicle, the electromagnet 82 does not need to remain operating, thereby reducing the risk of damage to the electromagnet 82 due to long-term operation. When the vehicle needs to be restarted and only the brake motor 1 needs to be controlled to rotate, the ratchet 33 rotates along the first direction, and the rotating lever 81 returns to the idle position under the guidance of the latch of the ratchet 33 and under the action of the reset member until the next parking brake.

[0041] 14, in some embodiments, the maximum engagement depth c of the ratchet 33 and the latch 331 of the rotating lever 81 is greater than 3 mm, for example, the maximum engagement depth c of the latch 331 of the ratchet 33 is 4.5 mm, ensuring stability when the two are interlocked. Furthermore, the second force arm L2 from the working end of the rotating lever 81 to the center of rotation is more than three times the first force arm L1 from the working end to the center of rotation, for example, in the example shown in the figure, the second force arm L2 is 39.3 mm, the first force arm L1 is 7 mm, and the second force arm L2 is more than five times the first force arm L1, and such a setting can reduce the displacement d of the electromagnet 82. Meanwhile, the rotating lever 81 may have a counterweight portion 818 so that the center of gravity of the rotating lever is closer to the center of rotation, which may reduce the requirement for the capacity of the electromagnet 82, i.e., the electromagnet 82 may have a smaller thrust and therefore a smaller volume.

[0042] 15 and 16, the end cap 39, on which the locking device 8 is pre-mounted, is assembled to the main housing 31, and a first seal piece 318 is placed between the main housing 31 and the end cap 39 to provide a seal therebetween. The electronic control unit 4 is then assembled to the main module 3, the end cap 39 having a port for connection between the electromagnet 82 and the electronic control unit 4, and a second seal piece 396 is placed around the port. The main housing 31 also has a port facing the electronic control unit, on which the output shaft 11 of the brake motor is exposed and a position sensor may be placed so that the angular position of the output shaft is monitored by the electronic control unit 4. An additional hole 310 may be used, for example, to place a line for connecting the brake motor 1 and the electronic control unit 4. A third seal piece 317 surrounds the output shaft 11 of the brake motor 1 and the hole 310 to provide an additional seal. From the above structure, it can be seen that the electromechanical brake according to the first embodiment of the present invention is compact in structure, reasonable in layout, convenient in assembly, and the modular design makes it easy for subsequent maintenance.

[0043] With continued reference to Figures 17-27, a second embodiment of the present invention will be described, in which only the back plate 40 of the electronic control unit is used instead of the electronic control unit 4, and other identical components are indicated by the same reference numerals. In this embodiment, the second end of the main housing 31 of the main module 3 has a cylindrical notch, and the end cap 39 is also arranged in a generally disk-shaped manner. In this embodiment, the locking device 8 is also substantially integrated in the end cap 39, and an actuating member, namely an electromagnet 82, is provided in the main housing 31. In particular, an electromagnet-accommodating cavity 318 is provided in the side wall of the cylindrical notch, the electromagnet 82 is contained in the electromagnet-accommodating cavity 318, and the end cap 39 also has a wall 399 (Figure 20) that matches the cylindrical profile of the electromagnet 82, such that the electromagnet 82 is located between the main housing 31 and the end cap 39 and is in contact with them when mounted in place. 19, when the electromagnet 82 is mounted in place, its working end 821 faces the rotating lever 81 and the connection port on the back of the electromagnet 82 faces the electronic control unit 4.

[0044] 20, it can be seen that the inside of the end cap 39 has a mounting hole 390 in which the rotating shaft 83 of the rotating lever is positioned, and holes 397, 398 for positioning the first and second locating pins 68, 69, and further, the inside of the end cap 39 also has a number of reinforcing bars branching out from the mounting hole 390. One end of the rotating shaft 83 fits into the mounting hole 390 and passes through the shaft hole 810 of the rotating lever 81, and is axially positioned by a fastening ring 833. The folding spring 843 is mounted on the first positioning pin 68 and the second positioning pin 69, in particular, a first end 844 of the folding spring 843 is fixed to the first positioning pin 68, its bent portion 845 bypasses the second positioning pin 69 and its second end 846 abuts against the rotating lever, the second end 846 being formed, for example, as a slot or collar to better support the arm of the rotating lever connected to the operating end 811.

[0045] 21, there is shown a specific structure of the rotating lever 81. The rotating lever 81 comprises a first arm 812, a second arm 813 and a third arm 814 extending from a shaft hole 810 along three directions, the ends of the first arm 812, the second arm 813 and the third arm 814 respectively extending axially from an operating end 811, an action end 819 and a counterweight portion 818, the operating end 811 being used to interact with the ratchet 33 in the manner detailed above in relation to the first embodiment, the operating end 819 receiving the pulling force of the electromagnet 82, and the counterweight portion 818 being located close to the pivot center of the center of gravity of the rotating lever. As can be seen from Figures 21 to 25, the rotation plane of the ratchet 33 is used as a first plane, and the rotation lever 81 rotates in a second plane parallel to the first plane, which is further away from the brake caliper module 5. In some embodiments, the rotation lever 81 at least partially coincides with the ratchet 33 in the axial direction, and its working end 811, working end 819 and counterweight portion 818 extend axially from the second plane to the first plane and are respectively located radially outside the ratchet. More specifically, the working end 819 and the counterweight portion 818 are always located on the radial outside of the ratchet 33 during the rotation of the rotation lever between the idle position and the working position, while the manner of interaction between the working end 811 and the latch of the ratchet is substantially the same as that described in the first embodiment, which will not be repeated here. Through this arrangement, the locking device 8 allows the size of the main module 1 to be increased by a small amount in the axial direction without increasing the size in other directions, allowing the main module 1 to be more compact.

[0046] 26 and 27, the end cap 39 may be formed as a disk and assembled into a cylindrical notch in the main housing 31 while a sealing piece 691 is provided between the two. Similarly, the connection ports of the electromagnet 82 and the end of the motor output shaft extend to the electronic control unit 4.

[0047] The third embodiment according to the present invention will continue to be introduced with reference to Figures 28 to 36. In this example, an adapter 41 is provided between the electronic control unit 4 and the electromagnet 82 and the brake motor 1, and in some embodiments, the adapter 41 may include a clamp portion 43 for receiving the electromagnet 82, as shown in Figure 36. The adapter 41 also includes a plurality of positioning mounting holes 441. Furthermore, the adapter 41 also includes a socket 610 facing the rear side of the electronic control unit 4, two terminals 611 connected to the electromagnet, and three terminals 612 connected to the three-phase brake motor 1.

[0048] 30 and 31, a locking device combined with an end cap 39 and a separate locking device is shown. In some embodiments, the end cap 39 is designed with at least one positioning post 395 inserted into the mounting hole of the main housing to have a reaction force carried by the end cap when the ratchet is engaged with the rotating lever. Furthermore, in the third embodiment, the reset member is similar to the folding spring of the second embodiment, and the rotating shaft 83 is configured to have a first post portion 837, a second post portion 838, and a transition portion 839, since the rotating shaft 83 cannot be drilled at the corresponding position of the main housing, and the first post portion 837 and the second post portion 838 are biased and connected by the transition portion 839. The first post portion 837 passes through a locating pad 63 which is inserted into a hole on the end cap, and the second post portion 838 is inserted into a locating hole 315 in the main housing 31, which is arranged to include both the second post portion 838 and the transition portion 839, thereby inhibiting rotation of the rotating shaft 83. The rotating shaft 83 passes through a rotating lever 81, the working end 811 of which interacts with the ratchet 33 in the manner described above in connection with the first embodiment. An electromechanical brake 100 according to a fourth embodiment of the present invention will be described with reference to Figures 37 to 45. The electromechanical brake 100 employs a modular design and generally comprises a brake motor 1, a main module 3, a brake module 5, and an electronic control unit 4. The electronic control unit 4 may be connected to the brake motor 1 and an actuating mechanism of the locking device 8, such as an electromagnet through an adapter 41. The main module 3 may comprise a main housing 31 and an end cap 39, which may include a spindle 301 connected to the brake motor 1, the spindle 301 being driven by the brake motor 1 to rotate along a first direction to drive the brake module 5 to perform a braking operation, i.e., in frictional contact with the brake disc 95, and the ratchet 33 being fixedly disposed on the spindle 301.

[0049] Further, as shown in FIG. 38, the electromechanical brake according to the present invention includes a main module 3 and a brake module 5 attached to a distal end of the main module 3. The main module 3 includes a main housing 31 and an end cap 39, and the main module 3 includes a spindle 301, a ball screw nut mechanism 304, a ratchet 33, a worm gear 32, a locking device 8, and an adapter 41. A first end of the main housing 31 is connected to the brake module 5, and a second end of the main housing 31 opposite to the first end is closed by the end cap 39. The brake motor 1 and the electronic control unit 4 are integrated on both sides of the main module 3, and an output shaft of the brake motor 1 is inserted into the main housing 31 to mesh with the worm gear on the spindle 301, and an end of the output shaft may extend to the electronic control unit 4, and the angular position of the output shaft of the brake motor 1 is detected by a sensor. It will be appreciated that the operation of the brake motor 1 and the actuating members of the locking mechanism 8 are controlled by an electronic control unit 4 which may be connected to the brake motor 1 and the electromagnet 82 through, for example, an adapter 41 .

[0050] 39 and 40, three-dimensional views of the assembled and disassembled states of the locking device 8 are shown. The locking device 8 comprises a locking device housing 89 connected to a rotating lever 81 of the locking device housing 89 through a rotating shaft 83, the rotating lever 81 having an operating end 811, the rotating lever 81 being rotatable between an idle position and a working position, the operating end 811 of the rotating lever 81 being disengaged from the ratchet 33 in the idle position and the operating end 811 of the rotating lever 81 being engaged with the ratchet 33 in the working position. The locking device 8 also comprises an actuating member and a resetting member, the actuating member rotates the rotating lever 81 from the idle position to the working position, and the resetting member returns the rotating lever 81 from the working position to the idle position. The ratchet 33 and operating end 811 of the rotating lever are positioned such that the operating end 811 interferes with the ratchet 33 in the working position to prevent the ratchet 33 from rotating in a second direction opposite to the first direction and to prevent the rotating lever 81 from returning to the idle position.

[0051] In some embodiments, the locking device housing 89 comprises a first cavity 891 for accommodating the actuating member, a second cavity 890 for accommodating the rotating shaft 83, the rotating lever 81, and a reset member. In some embodiments, the actuating member is an electromagnet 82. The electromagnet 82 may have a generally cylindrical shape and may comprise a terminal 822 for electrical connection and an acting end 821 for performing linear displacement (FIG. 44). The first cavity 891 may be configured to match the shape of the electromagnet 82, for example, the first cavity 891 may be configured as a cylindrical cavity to match a cylindrical electromagnet. In alternative embodiments, the actuating member may adopt any other suitable structure, and the shape of the first cavity 891 may also be adaptively modified. In alternative embodiments, the actuating member may be any other component capable of driving the movement of the rotating lever.

[0052] In some embodiments, the first cavity 891 and the second cavity 890 are spaced apart by an intermediate wall 8971 having a hole 897 that allows the active end 821 of the electromagnet 82 to pass through the hole 897 translationally, thereby acting on a rotating lever 81, which is described in more detail below. As shown in FIG. 39 , the electromagnet 82 may be inserted into the first cavity 891 from one end of the first cavity 891 opposite the intermediate wall 8971, with the shape of the first cavity 891 confining the electromagnet 82 radially.

[0053] In some embodiments, the second cavity 890 comprises opposing walls 893, 894, and the rotating shaft 83 is connected between mounting holes 892 in the opposing walls 893, 894, for example by riveting or other connection style. The rotating lever 81 comprises a shaft hole 810 for mounting in a sifting mode on the rotating shaft 83, and further, in some embodiments, washers 931, 932 may also be provided, which are also provided on both sides of the rotating lever 81 on the rotating shaft 83, thereby providing between the rotating lever 81 and the opposing walls 893, 894 to axially restrict the rotating lever 81. In some embodiments, the rotating lever 81 comprises a concave part 913 corresponding to the washers 931, 932. The washers 931, 932 may be made of a suitable material, for example plastic, rubber, or metal.

[0054] In some embodiments, the reset member is a folding spring 843 mounted on a pin 899 extending from opposing walls 893, 894. In the illustrated embodiment, there are two pins 899 connected to the top wall 893, and the folding spring 843 has a first end 844 connected to the first pin, a bent portion 845 bypassing the second pin, and a second end 846 connected to the rotating lever, the second end 846 being located at a position of the rotating lever 81 close to the operating end 811, thereby allowing the reset force to be provided by the elastic force of the folding spring 843. In alternative embodiments, the reset member may also employ a coil spring, disc spring, or the like, mounted to the locking device housing and applying an elastic force to the rotating lever 81. In some embodiments, the second end 846 of the folding spring 843 is configured with a barb 8431, thereby restricting the rotating lever 81 to prevent it from being separated from the second end 846 during vibration and impact.

[0055] In some embodiments, the locking device 8 further comprises a banking pin 85 extending from one of the opposing walls 893, 894, the banking pin 85 being configured to restrain the rotating lever 81 when the rotating lever 81 returns from the working position to the idle position under the effect of the folding spring 843 of the reset member. In some embodiments, the banking pin 85 is wrapped with a cushion collar 851, such as a layer of rubber, thereby avoiding noise generated when the rotating lever 81 collides with the banking pin 85.

[0056] In some embodiments, the rotating lever 81 has an action end 819 that contacts an actuating member, for example, contacts an execution end 821 of the electromagnet 82 to receive power to drive the rotating lever 81 to rotate, and the shaft hole 810 of the rotating lever 81 is located between the action end 811 and the action end 819. For a compact overall structure of the locking device 8, the action end 819 is closer to the shaft hole 810 than the action end 811, and the force arm is shorter relative to the electromagnet 82 such that the capacity requirement of the electromagnet 82 is greater, thereby increasing the volume of the electromagnet 82. In some embodiments, the action end 819 is configured to have a counterweight portion 818 such that the center of gravity of the rotating lever 81 is located closer to the shaft hole 810, thereby reducing the capacity requirement of the electromagnet 82. In other aspects, in some embodiments, the action end 811 has an axial extension that extends perpendicular to the rotation plane of the rotating lever 81 and thereby interacts with the ratchet 33. In alternative embodiments, the working end 811 may have any structure, such as a pawl, a hook portion or a pin that can interface with the ratchet 33 .

[0057] As shown in Figures 40 to 42, the locking device 8 is first pre-assembled, including assembling the electromagnet 82, the rotating lever 81, the folding spring 843, and the banking pin 85 into the locking device housing 89. In this state, as the execution end 821 of the electromagnet 82 protrudes or retracts based on the control signal, the rotating lever 81 correspondingly rotates upward in the in-plane aa direction, i.e., between the idle position and the working position, using the rotating shaft 83 as the circle center. When installed in a fixed position, the rotation range of the rotating lever 81 is limited by the banking pin 85 and the ratchet 33.

[0058] The pre-assembled locking device 8 is installed in the main housing 31. In some embodiments, the locking device housing 89 of the locking device 8 may have a limiting feature that matches the main housing 31, for example, the wall 894 may have a protruding portion 895 that aligns and matches with a slot 310 on one platform of the main housing 31, and the limiting mechanism ensures that the locking device 8 can remain positioned when it has a reaction force of the ratchet 33. Furthermore, the locking device housing 89 further comprises a bolt hole 896 that is connected with a bolt 91 that passes through the wall of the main housing 31, for example, in the illustrated embodiment, the locking device housing 89 has bolt holes 896 at two corners on one end where the actuating member is located, the bolt holes 896 are aligned with holes 319 on the main housing 31, and the bolts 91 pass through the holes 319 that are connected to the bolt holes 896 of the locking device housing 89. The limiting feature and the bolt fastening are matched to secure the locking device 8 in the main housing 31. In alternative embodiments, the locking device 8 may be secured generally within the main housing 31 by other suitable means, such as, for example, a snap connection, fasteners, or engagement with restrictive features of adhesive.

[0059] As can be seen from Fig. 41 and Fig. 43, the adapter 41 is also mounted in the main housing 31, and the adapter 41 includes a socket 610, which is exposed on the end surface of the main housing 31 facing the electronic control unit 4 to be connected to the adapter when the electronic control unit 4 is mounted. Meanwhile, the adapter also includes a number of terminals 611, 612, a part 611 of the plurality of terminals is used to connect to the actuating mechanism of the locking device 8, and another part 612 of the plurality of terminals is connected to the brake motor 1. An actuating member such as an electromagnet 82 includes a terminal 822 connected to the adapter, and the terminal 822 may be located at the rear end of the electromagnet 82 opposite to the execution end 821. In the embodiment shown in Fig. 43, when assembled in the main housing 31, the terminal 822 of the electromagnet 82 faces the end cap 39 of the main housing, and a wire may be welded between the terminal 822 of the electromagnet and the terminal 611 of the adapter 41. As shown in Figures 44 and 45, in an alternative embodiment, the terminal 822 of the electromagnet 82 may also be located at the same end of the active end 821, with the terminal 822 of the electromagnet 82 facing the adapter 41 when assembled within the main housing 31.

[0060] The electronic brake device according to an embodiment may be operable as follows: during a conventional driving process, the electronic control unit 4 controls the brake motor 1 to rotate and allows the spindle 301 to rotate along a first direction based on the stroke force or input force of the brake pedal, thereby driving the brake module 5 to apply a brake torque corresponding to the stroke force or input force of the brake pedal. In this process, the rotation lever 81 of the locking device always stays in an idle position by the reset member. In the control under parking brake conditions, upon receiving a parking brake signal (such as a hand brake or an electric brake), the electronic control unit 4 controls the brake motor 1 to rotate and allows the spindle 301 to rotate along a first direction, thereby driving the brake module 5 to establish a predetermined brake torque even when the brake caliper clamps the brake disc 95. Thereafter, the electronic control unit 4 controls the actuating member to act on the rotating lever 81 to rotate it from the idle position to the working position as shown by the arrow a in Fig. 45, and at this time, the working end 811 of the rotating lever 81 does not necessarily need to coincide with the latch 331 of the ratchet 33, and the brake motor 1 is controlled to rotate slightly (for example, by one tooth) along the second direction, so that the working end 811 of the rotating lever moves to the working position so as to engage with the latch 331 of the ratchet 33 (in a state where it is sandwiched in the gap 330 between the latches 331), and at this time, the electromagnet 82 and the brake motor 1 may be de-energized. Since it is in the working position, the ratchet 33 and the working end 811 of the rotating lever are arranged such that the working end 811 interacts with the ratchet 33 to prevent the ratchet 33 from rotating in a second direction opposite to the first direction, and prevent the rotating lever 81 from returning to the idle position. The brake module 5 is therefore able to retain braking torque even when the power to the electromagnet 82 and the brake motor 1 is turned off, so that when the vehicle is in the parking brake state, the electromagnet 82 does not need to remain activated, thereby reducing the risk of damage to the electromagnet 82 due to long-term operation.When the vehicle is restarted, the electronic control unit 4 causes the brake motor 1 to rotate the spindle 301 slightly along a first direction, and due to the design of the latch 331, the rotation of the ratchet 33 along the first direction releases the rotation lever 81, and the reset member returns the rotation lever 81 to the idle position until the next parking brake.

[0061] The electromechanical brake according to various embodiments of the present invention is described above. For the design of the locking device in the various embodiments above, an important factor is its size. As described above in relation to FIG. 1, due to the space limitations of the electromechanical brake itself, the size of the locking device to achieve the parking brake function needs to be as small as possible. The design of the rotary lever of the locking device is particularly important as well as its relationship to the size of the electromagnet. In one embodiment, it is desirable to minimize the displacement of the working end 821 of the electromagnet 82 while ensuring sufficient displacement of the working end. Thus, in some embodiments, as shown in FIG. 14, the locking device is configured such that the travel distance c of the working end 811 of the rotary lever 81 during the movement of the rotary lever 81 from the idle position to the working position is more than three times the travel distance d of the working end 819 of the rotary lever 81. In some embodiments, the travel distance c of the working end 811 of the rotary lever 81 is more than five times the travel distance d of the working end 819 of the rotary lever 81, for example, c is approximately 0.8 mm and d is more than 4.5 mm. 8, the working end 819 is located on the same side of the shaft bore 810 as the working end 811, while in other embodiments the working end 819 is located on the opposite side of the shaft bore 810 as the working end 811. The above displacement ratio may be achieved by setting the position of the rotation axis from the working end, for example, the working end 819 is made closer to the rotation axis, i.e., the shaft bore 810. A smaller displacement of the working end 819 corresponds to a smaller displacement and smaller size of the electromagnet 82.

[0062] In some embodiments, the rotating lever 81 further includes a counterweight portion 818 located on a second side of the shaft hole 810 opposite the first side, so that the center of gravity of the rotating lever 81 is close to the shaft hole 810. In some embodiments, the distance from the center of gravity of the rotating lever 81 to the shaft hole 810 is less than 1 cm. Bringing the center of gravity of the rotating lever 81 closer to the center of gravity allows the rotating lever 81 to rotate under a small actuation force. To reduce the displacement, the working end 819 is closer to the center of rotation, which results in a reduction in the torque of the actuation force. Increasing the counterweight portion 818 makes such a small torque to ensure the rotation of the rotating lever 81. The counterweight portion 818 can be achieved in various ways, but in order not to significantly increase the volume, its material may be changed, for example, by selecting a heavy metal or by constructing an extension along the axial direction, which increases the weight. In order not to increase the volume significantly, the maximum distance from the working end 811 to the rotating shaft 83 is more than three times, for example more than five times, the maximum distance from the counterweight portion 818 to the rotating shaft 83, the counterweight portion has a smaller radial dimension, and the weight mainly depends on the axial extension. Considering the third and fourth embodiments as examples, the counterweight portion 818 is disposed on the working end 819 and extends axially in both directions from the working end 819, such that the working end 819 has a larger thickness than the working end. In the second embodiment, the rotating lever 81 comprises a first arm 812, a second arm 813 and a third arm 814 extending from the shaft hole 810 along three directions, and the ends of the first arm 812, the second arm 813 and the third arm 814 are respectively configured as the working end 811, the working end 819 and the counterweight portion 818. In various embodiments, the working end 811, the working end 819, and / or the counterweight portion 818 have an axial extension that extends in the axial direction.

[0063] Additionally, for various embodiments, the locking device 8 may be pre-assembled separately, the end cap 39 may be utilized as a bracket for the various components, and a separate locking device housing 89 may be utilized as a bracket for the various components as shown in the fourth embodiment. Through such an arrangement, the locking device 8 may be pre-assembled on a separate production line and simply attached to or assembled with a main housing manufactured by another production line, which avoids the issue of an overly long single production line.

[0064] The electromechanical brake according to the present application is compact in structure, and during parking braking, the operating mechanism of the locking device does not need to be powered on, thereby avoiding failure caused by long-term power-on, while the requirements for the capacity and volume of the electromagnet are reduced by the special design of the rotating lever.

[0065] The specific examples described above in this application are intended only to more clearly describe the principles of this application, i.e., to clearly illustrate or describe various components to facilitate understanding of the principles of the present invention. Within the scope of this application, those skilled in the art can easily make various modifications or changes to this application. Therefore, it should be understood that these modifications or changes are all included within the scope of patent protection of this application.

Claims

1. A locking device for an electromechanical brake, the locking device comprising: A bracket and a rotating lever (81), the rotating lever (81) having an operating end (811) for interfacing with a ratchet (33) of the electromechanical brake, the rotating lever (81) being connected to the bracket through a rotating shaft (83), so that the rotating lever (81) can rotate between an idle position and a working position having the rotating shaft (83) as a rotation axis; an electromagnet (82) acting on an operating end (819) of the rotating lever (81) to rotate the rotating lever (81) from the idle position to the working position; a reset member that returns the rotating lever (81) from the working position to the idle position; The locking device is configured such that a movement distance c of the operating end (811) of the rotating lever (81) is more than three times a movement distance d of the action end (819) of the rotating lever (81) during the movement of the rotating lever (81) from the idle position to the working position, and optionally, the movement distance c of the operating end (811) of the rotating lever (81) is more than five times the movement distance d of the action end (819) of the rotating lever (81).

2. 2. The locking device of claim 1, wherein the operating end (811) is located on a first side of a shaft hole (810) coinciding with the rotating shaft (83), and the rotating lever (81) further comprises a counterweight portion (818) located on a second side of the shaft hole (810) opposite the first side, and optionally, the distance from the center of gravity of the rotating lever (81) to the shaft hole (810) is less than 1 cm, so that the center of gravity of the rotating lever (81) is close to the shaft hole (810).

3. The counterweight portion (818) is arranged on the working end (819), or the rotating lever (81) comprises a first arm (812), a second arm (813) and a third arm (814) extending along three directions from the shaft hole (810), the ends of the first arm (812), the second arm (813) and the third arm (814) being configured as the working end (811), the working end (819) and / or the counterweight portion (818), respectively, and the working end (811), the working end (819) and / or the counterweight portion (818) have an axial extension extending along the axial direction.

4. 2. The locking device of claim 1, wherein a maximum distance from the working end (811) to the rotating shaft (83) is more than three times a maximum distance from the counterweight portion (818) to the rotating shaft (83), and optionally a maximum distance from the working end (811) to the rotating shaft (83) is more than five times the maximum distance from the counterweight portion (818) to the rotating shaft (83).

5. The locking device according to any one of claims 1 to 4, wherein the bracket is a separate locking device housing (89), the rotating lever (81) is connected to the locking device housing (89) through the rotating shaft (83), and the locking device housing (89) comprises a first cavity (891) for accommodating the electromagnet (82) and a second cavity (890) for accommodating the rotating shaft (83), the rotating lever (81) and the reset member.

6. 6. The locking device of claim 5, wherein the first cavity (891) is configured to match a shape of the electromagnet (82), the first cavity (891) and the second cavity (890) are separated by an intermediate wall (8970) having a hole (897) that allows an active end (821) of the electromagnet (82) to pass through, the second cavity (890) comprises opposing walls (893, 894), the rotating shaft (83) is connected to a mounting hole (892) in the opposing walls (893, 894), the rotating lever (81) is disposed on the rotating shaft (83) in a screening mode, and washers (931, 932) are disposed between the rotating lever (81) and the opposing walls (893, 894) to axially limit the rotating lever (81).

7. 6. The locking device of claim 5, wherein the reset member is a folding spring (843) mounted on a pin (899) extending from the opposing walls (893, 894), the folding spring (843) having a first end (844) connected to a first pin, a bend (845) bypassing the second pin, and a second end (846) connected to the rotatable lever, and the locking device (8) further comprises a banking pin (85) extending from the opposing walls (893, 894), the banking pin (85) configured to limit the rotatable lever (81) when the rotatable lever (81) returns to the idle position from the working position, the banking pin (85) being wrapped with a cushion collar (851).

8. 5. The locking device according to claim 1, wherein the bracket forms an end cap (39) of the main module (3) of the electromechanical brake, the end cap (39) having an additional accommodating cavity (391) containing an electromagnet (82), the electromagnet (82) being arranged in the additional accommodating cavity (391), one end of the rotating shaft (83) of the rotating lever (81) being arranged in the hole (392) of the end cap, the rotating lever (81) being rotationally fixed to the rotating shaft (83), the reset member being a torsion spring (84) arranged on the rotating shaft (83), a first end (841) of the torsion spring (84) abutting a hook portion (817) of the rotating lever and a second end (842) of the torsion spring being fixed.

9. 1. An electromechanical brake, comprising: A brake motor (1); a spindle (301) coupled to the brake motor, the spindle (301) being driven by the brake motor to rotate along a first direction and drive a brake module (5) to perform a braking operation, a ratchet (33) being fixedly disposed on the spindle (301); A locking device (8) according to any one of claims 1 to 5, wherein the operating end (811) is separated from the ratchet (33) when the rotating lever of the locking device (8) is in the idle position, and the operating end (811) is interlocked with the ratchet (33) when the rotating lever of the locking device (8) is in the working position; The ratchet (33) and the operating end (811) of the rotating lever are arranged such that, when in the working position, the operating end (811) interacts with the ratchet (33) to prevent the ratchet (33) from rotating along a second direction opposite to the first direction and to prevent the rotating lever (81) from rotating towards the idle position.

10. the spindle (301) has a front end (302) and an opposite rear end (303), the front end (302) of the spindle is connected to the brake module (5) through a ball screw nut mechanism (304), the ratchet (33) is fixedly attached to the rear end (303) of the spindle (301), a worm gear (32) is fixedly disposed in an intermediate section between the front end (302) and the rear end (303) of the spindle (301), an output shaft (11) of the brake motor (1) is configured as a worm meshed with the worm gear (32) on the spindle (301); the electromechanical brake comprises a brake motor (1), a main module (3), a brake module (5) and an electronic control unit (4), the main module (3) comprises a main housing (31) and an end cap (39), the spindle (301), the ball screw nut mechanism (304), the ratchet (33), the worm gear (32) and the locking device (8) are accommodated between the main housing (31) and the end cap (39), a first end of the main housing (31) is connected to the brake module (5) and a second end of the main housing (31) opposite to the first end is closed by the end cap (39), the brake motor (1) and the electronic control unit (4) are connected to the main housing (31) from two opposite sides of the main housing (31), 10. The electromechanical brake of claim 9, wherein the locking device (8) is pre-assembled and then attached to the main housing (31), the locking device housing (89) of the locking device (8) having restrictive features that match with the main housing (31), the locking device housing (89) further having a bolt hole (896) that connects with a bolt (91) that passes through a wall of the main housing (31).

11. 11. The electromechanical brake of claim 10, further comprising an adapter (41) attached to the main housing (31), the electronic control unit (4) being electrically connected to the electromagnet (82) and the brake motor (1) through the adapter (41), respectively, the electromagnet (82) having a terminal (822) connected to the adapter, the terminal (822) facing towards the adapter (41) or the terminal facing towards the end cap (39).

Images