Electromechanical brake and locking device therefor

Abstract

The invention provides an electromechanical brake and a locking device therefor. The locking device comprises a support; the rotating rod comprises an operating end which is used for being interlocked with a ratchet wheel of the electronic mechanical brake, and the rotating rod is connected to the support through a rotating shaft, so that the rotating rod can rotate between an idle position and a working position by taking the rotating shaft as a rotating axis; the electromagnet acts on the acting end of the rotating rod, so that the rotating rod is driven to rotate from the idle position to the working position; the reset component is used for promoting the rotating rod to return to the idle position from the working position; the locking device is configured to enable the moving distance c of the operating end of the rotating rod to be more than three times of the moving distance d of the acting end when the rotating rod moves from the idle position to the working position. According to the electronic mechanical brake, the occupied space is smaller, and the electronic mechanical brake is more compact.

Description

Technical Field

[0001] The present invention relates to the field of vehicle braking devices, and more particularly, to an electromechanical brake and a locking device therefor. Background Art

[0002] Electromechanical brakes are devices that achieve braking by driving the brake caliper with an electric motor. Compared with traditional hydraulic pipeline brakes, they have the advantages of fast response, simple structure, and easy maintenance. As vehicles move towards electrification and intelligence, electromechanical brakes have become a development trend in the braking system because they are easier to integrate with electric control systems. Since the electromechanical brake is set inside the vehicle wheel hub, how to balance compactness and functionality is a challenge in the design of electromechanical brakes.

[0003] In conventional hydraulic brake systems, the hydraulic pressure in the brake cylinder is maintained by a hand brake or foot brake, thereby achieving parking brake. For electromechanical brakes, in order to achieve the parking brake function, a parking lock device is often configured, such as using a pin driven by an electromagnetic actuator to interfere with the transmission mechanism to lock the brake. However, this type of system requires the electromagnetic actuator to be energized when the vehicle is parked, and when the electromagnetic actuator fails, the parking brake may fail. Summary of the invention

[0004] The purpose of this application is to solve or at least alleviate the problems existing in the prior art.

[0005] In one aspect, a locking device for an electromechanical brake is provided, comprising: Bracket; a rotating rod, the rotating rod comprising an operating end for interlocking with a ratchet of the electromechanical brake, the rotating rod being connected to the bracket via a rotating shaft so that the rotating rod can rotate between an idle position and an operating position with the rotating shaft as a rotation axis; an electromagnet, the electromagnet acting on an active end of the rotating rod, thereby causing the rotating rod to rotate from the idle position to the working position; A reset component, which causes the rotating rod to return from the working position to the idle position; wherein the locking device is configured so that during the movement of the rotating rod from the idle position to the working position, the movement distance c of the operating end of the rotating rod is more than 3 times the movement distance d of the active end, and optionally, the movement distance c of the operating end of the rotating rod is more than 5 times the movement distance d of the active end.

[0006] Optionally, in an embodiment of the locking device, the operating end is located on a first side of the rotating shaft, and the rotating rod further includes a counterweight portion located on a second side of the rotating shaft opposite to the first side, so that the center of gravity of the rotating rod is near the rotating shaft.

[0007] Optionally, in an embodiment of the locking device, the distance from the center of gravity of the rotating rod to the rotating axis is less than 1 cm.

[0008] Optionally, in an embodiment of the locking device, the counterweight portion is arranged on the acting end, or the rotating rod includes a first arm, a second arm and a third arm extending from the axial hole in three directions, and the ends of the first arm, the second arm and the third arm are respectively configured as the operating end, the acting end and the counterweight portion.

[0009] Optionally, in an embodiment of the locking device, the operating end, the action end and / or the counterweight portion has an extension portion extending in the axial direction.

[0010] Optionally, in an embodiment of the locking device, the maximum distance from the operating end to the rotating shaft is more than 3 times the maximum distance from the counterweight portion to the rotating shaft.

[0011] Optionally, in an embodiment of the locking device, the maximum distance from the operating end to the rotating shaft is more than 5 times the maximum distance from the counterweight portion to the rotating shaft.

[0012] Optionally, in an embodiment of the locking device, the bracket is an independent locking device housing, the rotating rod is connected to the locking device housing through the rotating shaft, and the locking device housing includes a first cavity for accommodating the electromagnet and a second cavity for accommodating the rotating shaft, the rotating rod and the reset member.

[0013] Optionally, in an embodiment of the locking device, the first cavity is configured to match the outer shape of the electromagnet, the first cavity and the second cavity are separated by an intermediate wall, and the intermediate wall has an opening allowing the actuating end of the electromagnet to pass through.

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

[0015] Optionally, in an embodiment of the locking device, the rotating rod is sleeved on the rotating shaft and a washer is arranged between the rotating rod and the relative wall to limit the axial position of the rotating rod.

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

[0017] Optionally, in an embodiment of the locking device, the folding spring includes a first end connected to the first column pin, a bent portion bypassing the second column pin, and a second end connected to the rotating rod.

[0018] Optionally, in an embodiment of the locking device, the locking device further comprises a stop pin extending from the relative wall, and the stop pin is configured to limit the rotating rod when the rotating rod returns from the working position to the idle position.

[0019] Optionally, in an embodiment of the locking device, the stop pin is wrapped with a buffer sleeve.

[0020] Optionally, in an embodiment of the locking device, the bracket constitutes an end cover of a main module of the electromechanical brake, and the end cover has an additional cavity for accommodating an electromagnet, and the electromagnet is arranged in the additional cavity.

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

[0022] In another aspect, an electromechanical brake is provided, comprising: Brake motor; a main shaft connected to the brake motor, the main shaft being driven by the brake motor to rotate in a first direction to drive the brake module to perform a braking operation, wherein a ratchet is fixedly disposed on the main shaft; and The locking device according to various embodiments, wherein when the rotating rod of the locking device is in an idle position, the operating end is separated from the ratchet, and when the rotating rod of the locking device is in a working position, the operating end is interlocked with the ratchet; Wherein, the operating end of the ratchet and the rotating rod is arranged so that when in the working position, the operating end interacts with the ratchet to prevent the ratchet from rotating in a second direction opposite to the first direction, and prevents the rotating rod from rotating to the idle position.

[0023] Optionally, in an embodiment of the electronic mechanical brake, the main shaft includes relative front and rear ends, the front end of the main shaft is coupled to the brake module through a ball screw nut mechanism, the ratchet is fixedly mounted on the rear end of the main shaft, and a worm gear is also fixedly provided in the middle section between the front and rear ends of the main shaft.

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

[0025] Optionally, in an 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 cover, the main shaft, the ball screw nut mechanism, the ratchet, the worm gear and the locking device are accommodated between the main housing and the end cover, 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 end cover, and the brake motor and the electronic control unit are connected to the main housing from opposite sides of the main housing; Optionally, in an embodiment of the electromechanical brake, the locking device is pre-assembled and mounted to the main housing.

[0026] Optionally, in an embodiment of the electronic mechanical brake, the locking device housing of the locking device includes a limiting feature that cooperates with the main housing, and the locking device housing also includes a bolt hole to connect to a bolt passing through the wall of the main housing.

[0027] Optionally, in an embodiment of the electronic mechanical brake, the electronic mechanical brake also includes an adapter installed in the main housing, the electronic control unit is electrically connected to the electromagnet and the brake motor respectively through the adapter, and the electromagnet includes a terminal connected to the adapter, the terminal is facing the adapter, or the terminal is facing the end cover.

[0028] 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

[0029] The disclosure of the present application will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present application. In addition, similar numbers in the drawings are used to represent similar components, among which: Figure 1 shows an exploded view of an electromechanical brake according to an embodiment when assembled to a wheel hub; Figure 2 A perspective view showing an electromechanical brake according to a first embodiment of the present invention; Figure 3 shows an exploded view of an electromechanical brake according to a first embodiment of the present invention; Figure 4 A schematic diagram of an electromechanical brake according to an embodiment of the present invention is shown; Figure 5 An exploded view of an end cap and a locking device according to a first embodiment of the present invention is shown; Figure 6 A perspective view of a rotating rod according to a first embodiment of the present invention is shown; Figure 7 An assembly view of an end cap and a locking device according to a first embodiment of the present invention is shown; Figure 8 shows an exploded view of a locking device according to a first embodiment of the present invention; Fig. 9 shows a perspective view of an electromechanical brake according to a first embodiment of the present invention with the end cap removed; Fig.10 and Fig.11 A front view and a perspective view respectively show a locking device in an idle state according to a first embodiment of the present invention; Fig.12 It shows a front view of the locking device according to the first embodiment of the present invention when it is switched from an idle state to a working state; Fig.13 It shows a front view of the locking device according to the first embodiment of the present invention in the working state; Fig.14 shows part of the design dimensions of the locking device according to the first embodiment of the present invention; Fig.15 A schematic diagram showing the assembly of the end cover of the electromechanical brake according to the first embodiment of the present invention; Fig.16 A schematic diagram showing an electronic control unit of an electronic mechanical brake according to a first embodiment of the present invention when assembled; Fig.17 A perspective view showing an electromechanical brake according to a first embodiment of the present invention; Fig.18 shows a partially exploded view of an electromechanical brake according to a second embodiment of the present invention; Fig.19 A perspective view showing an end cap and a locking device of an electromechanical brake according to a second embodiment of the present invention; Fig. 20 An exploded view showing an end cap and a locking device of an electromechanical brake according to a second embodiment of the present invention; Fig.21 A perspective view of a rotating rod according to a second embodiment of the present invention is shown; Fig. 22 and Fig.23 The front view and rear view of the locking device in an idle state according to the second embodiment of the present invention are respectively shown; Fig.24 and Fig.25 A perspective view and a front view respectively show a locking device in an idle state according to a second embodiment of the present invention; Fig.26 A schematic diagram showing an end cover of an electromechanical brake according to a second embodiment of the present invention when assembled; Fig. 27 A schematic diagram showing an electromechanical brake according to a second embodiment of the present invention when assembled; Fig.28 A perspective view showing an electromechanical brake according to a third embodiment of the present invention; Fig.29 A partial exploded view of an electromechanical brake according to a third embodiment of the present invention is shown; Fig.30 A perspective view showing an end cap and a locking device of an electromechanical brake according to a third embodiment of the present invention; Fig.31 A perspective view of a locking device according to a third embodiment of the present invention is shown; Fig.32 An exploded view showing an end cap and a locking device of an electromechanical brake according to a third embodiment of the present invention; Fig.33 shows a perspective view of a pivot pin according to a third embodiment of the present invention; Fig.34 and Fig.35 A perspective view of a main housing and an enlarged view of a pivot pin receiving hole therein are respectively shown according to a third embodiment of the present invention; Fig.36 A perspective view showing an adapter for an electromechanical brake according to a third embodiment of the present invention; Fig.37 A perspective view showing an electromechanical brake according to a fourth embodiment of the present invention; Fig.38 shows an exploded view of an electromechanical brake according to a fourth embodiment of the present invention; Fig.39 An exploded view showing a locking device of an electromechanical brake according to a fourth embodiment of the present invention; Fig.40 An assembly view showing a locking device of an electromechanical brake according to a fourth embodiment of the present invention; Fig.41 and Fig.42 They are views of different angles of assembling a locking device and a main housing according to a fourth embodiment of the present invention; Fig.43A view showing a locking device according to a fourth embodiment of the present invention when assembled; and Fig.44 and Fig.45 An electromagnet according to an alternative embodiment and a view thereof when assembled are respectively shown. DETAILED DESCRIPTION

[0030] Figure 1 The installation diagram of the electromechanical brake is shown, wherein a rotating shaft 97, a shock absorber 92, a bearing 94, a steering knuckle arm 93, a brake disc 95 and a wheel 96 are shown, and an electromechanical brake 100 according to an embodiment is driven by a motor to provide a 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, and the electromechanical brake 100 is accommodated in a compact space inside the wheel hub of the wheel 96.

[0031] refer to Figures 2 to 16 The electronic mechanical brake 100 according to the first embodiment of the present invention is introduced. The electronic mechanical brake 100 is modularly designed and generally includes a brake motor 1, a main module 3, a brake caliper module 5 and an electronic control unit 4. The main module 3 contains a main shaft 301 connected to the brake motor 1, and the direction along which the main shaft 301 is located is defined as an axial direction in this document. The main shaft 301 rotates in a first direction under the drive of the brake motor 1 to drive the brake caliper module 5 to perform a braking operation, that is, to rub against the brake disc 95, wherein a ratchet 33 is fixedly arranged on the main shaft 301.

[0032] refer to Figure 4 As shown, the main shaft 301 includes a front end 302 and a rear end 303. The front end 302 of the main shaft 301, that is, the end close to the brake caliper module 5, constitutes a screw of the ball screw nut mechanism 304, and the ratchet 33 is arranged at the rear end 303 of the main shaft 301, that is, the end away from the brake caliper module 5. The middle part of the main shaft 301 (the position between the front end and the rear end) can be provided with a worm gear 32 to receive the torque from the brake motor 1, and at least a part of the section of the output shaft 11 of the brake motor 1 can be constructed as a worm 11, which is oriented to intersect with the axial direction and mesh with the worm gear 32 to transmit the torque (see Fig. 9 ). Alternatively, the brake motor 1 can also drive the main shaft 301 through a gear. The main shaft 301 rotates in the first direction under the drive of the brake motor 1, and drives the plunger 305 to move by means of the ball screw nut mechanism 304, so that the brake caliper module 5 clamps the brake disc 95 to perform the braking function.

[0033] On the other hand, a locking device 8 is provided to cooperate with the ratchet 33 to play the role of parking brake. The locking device includes: a rotating rod 81, the rotating rod 81 includes an operating end 811, and the rotating rod can be in an idle position (such as Fig.10 and Fig.11 ) and the working position where the operating end 811 is interlocked with the ratchet (as shown Fig.13 The ratchet wheel and the operating end of the rotating rod are arranged so that when in the working position, the operating end 811 interferes with the ratchet wheel 33 to prevent the ratchet wheel 33 from rotating in a second direction opposite to the first direction, and prevents the rotating rod 81 from returning to the idle position.

[0034] In some embodiments, the main module 3 of the electromechanical brake includes a main housing 31 and an end cover 39, wherein 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 cover 39. The space between the main housing 31 and the end cover 39 accommodates the main shaft 301, the ratchet 33, the worm gear 32, the locking device 8, etc. In the first embodiment, the locking device 8 is disposed in the end cover 39. Specifically, referring to Figure 5 In some embodiments, the end cover 39 includes a main body portion (lower portion) roughly used to cover the ratchet position in the main housing and an additional portion (upper portion) roughly used to cover the worm position in the main housing. The additional portion of the end cover has an additional cavity 391 for accommodating the actuating member of the locking device 8. In this embodiment, the actuating member is an electromagnet 82, which is disposed in the additional cavity 391 of the end cover. In this embodiment, the rotating shaft 83 of the rotating rod 81 is connected between the opening 392 of the end cover and the opening (not shown in the figure) at the corresponding position of the main housing. The rotating rod 81 is rotatably fixed to the rotating shaft 83, for example, the rotating shaft 83 passes through the shaft hole 810 of the rotating rod 81. Figure 8 In the specific embodiment shown, the rotating rod 81 is axially positioned on the rotating shaft 83 by the notches 831, 832 and the corresponding snap rings 833, 834 on the rotating shaft 83, and the opposite ends 835, 836 of the rotating shaft 83 are respectively interference fit to the openings of the end cover 39 and the main housing 31. In this embodiment, the reset member is a torsion spring 84 provided on the rotating shaft 83 and connected to the rotating rod 81.

[0035] More specifically, refer to Figure 7 The first end 841 of the torsion spring 84 abuts against the hook 817 of the rotating rod 81, and the other end 842 of the torsion spring is fixed, for example, abutting against the first protrusion 394 on the end cover, and the torsion spring 84 is pre-compressed or pre-stretched to provide a resetting elastic force. In addition, a second protrusion 393 is also provided on the end cover, and its function is to limit the rotating rod 81 when the elastic member resets the rotating rod. In some embodiments, the second protrusion 393 can be wrapped with a buffer material to provide buffering and reduce collision sound.

[0036] In some embodiments, the action end 819 of the rotating rod 81 extends axially and is used to contact with the actuating mechanism, such as the execution end 821 of the electromagnet 82, to receive power ( Figure 8 In the first embodiment, the rotating rod 81 is in the same plane as the ratchet 33, and is approximately located on the side of the ratchet close to the worm of the brake motor. The rotating rod 81 receives the rotating power by means of the action end 819 extending in the axial direction.

[0037] refer to Figures 10 to 13 , the ratchet 33 rotates with the spindle 301 in the first plane, the rotating rod 81 is configured to rotate in the first plane, in the idle position, the rotating rod 81 is located radially outside the ratchet 33 (the worm side), and the ratchet teeth 331 of the ratchet 33 are located on the outer periphery of the ratchet 33. In some embodiments, the operating end 811 is configured as a hook, and in the working position, the hook of the operating end 811 hooks one of the ratchet teeth 331 on the outer periphery of the ratchet, thereby achieving interlocking. More specifically, with Fig.13 For example, the counterclockwise direction corresponds to the first direction in which the ratchet 33 rotates when receiving the drive of the brake motor 1, and when the brake motor 1 stops working, the ratchet 33 has a second direction ( Fig.13 The ratchet 331 will bite the hook of the operating end 811 to achieve interlocking. At this time, even if the electromagnet 82 is powered off, that is, its execution end 821 is retracted, the ratchet 331 and the operating end 811 will not separate. On the contrary, when the ratchet 33 is rotated in the first direction (clockwise) again under the action of the brake motor 1, the ratchet 331 will bite the hook of the operating end 811 to achieve interlocking. Fig.13 When the rotating rod 81 is rotated in the counterclockwise direction (in the middle), under the action of the restoring elastic force of the torsion spring 84, the ratchet 331 will guide the rotating rod 81 to rotate toward the idle position, thereby releasing both the rotating rod 81 and the ratchet 33 at the same time.

[0038] refer to Figure 3 The electronic mechanical brake according to the present invention adopts a modular design, including a main module 3, a brake caliper module 5 installed at the far end of the main module 3, and a fastening nut 61 and a sealing ring 62 are arranged between the two. The main module 3 includes a main housing 31 and an end cover 39. The main housing 31 accommodates a main shaft 301, a ball screw nut mechanism 304, a ratchet 33, a worm gear 32 and 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 cover 39. The brake motor 1 and the electronic control unit 4 are integrated at opposite sides of the main module 3, such as the first side 313 and the second side 314. It should be understood that the operation of the brake motor 1 and the electromagnet 82 of the locking mechanism 8 is controlled by the electronic control unit 4. Specifically, as Figure 4As shown, the brake motor 1 and the electromagnet 82 are connected to the electronic control unit 4. In the parking brake control, when receiving the parking brake signal, the electronic control unit 4 controls the brake motor 1 to rotate so that the main shaft 301 rotates in the first direction, thereby driving the brake caliper module 5 to establish a predetermined braking torque, that is, the brake caliper clamps the brake disc 95. Subsequently, the electronic control unit 4 controls the electromagnet 82 to act on the rotating rod 81 to rotate from the idle position to the working position. At this time, the hook portion of the operating end of the rotating rod 81 is not necessarily aligned with the gap between the ratchet teeth 331 of the ratchet wheel 33 (for example, as shown in FIG. 1 ). Fig.12 As shown), the brake motor 1 is controlled to rotate slightly in the second direction (for example, the position of one tooth) so that the operating end 811 of the rotating rod moves to the position as shown. Fig.13 The working position shown is interlocked with the ratchet teeth 331 of the ratchet wheel 33, at which time, the electromagnet 82 and the brake motor 1 can be powered off. Since the rotating rod 81 is interlocked with the ratchet wheel 33, even if the electromagnet 82 and the brake motor 1 are powered off, the brake caliper module 5 can still maintain the braking torque, which makes it unnecessary for the electromagnet 82 to keep working under the parking brake condition of the vehicle, thereby reducing the risk of damage to the electromagnet 82 due to long-term operation. When it is necessary to restart the vehicle, it is only necessary to control the brake motor 1 to rotate, and the ratchet wheel 33 will rotate in the first direction, and the rotating rod 81 will return to the idle position under the guidance of the ratchet teeth of the ratchet wheel 33 and the action of the reset member until the next parking brake.

[0039] Continue to refer Fig.14 In some embodiments, the maximum engagement depth c of the ratchet teeth 331 of the ratchet wheel 33 and the rotating rod 81 is greater than 3 mm, for example, the maximum engagement depth c of the ratchet teeth 331 of the ratchet wheel 33 is 4.5 mm, to ensure the stability of the interlocking of the two. In addition, the second lever arm L2 from the operating end to the rotation center of the rotating rod 81 is more than 3 times the first lever arm L1 from the action end to the rotation center. For example, in the illustrated embodiment, the second lever arm L2 is 39.3 mm, the first lever arm L1 is 7 mm, and the second lever arm L2 is more than 5 times the first lever arm L1. This setting can reduce the displacement d of the electromagnet 82. On the other hand, the rotating rod 81 can have a counterweight portion 818, so that the center of gravity of the rotating rod is closer to the rotation center, which can reduce the requirements for the capacity of the electromagnet 82, that is, the electromagnet 82 can have a smaller thrust and therefore have a smaller volume.

[0040] Continue to refer Fig.15 and Fig.16, the end cover 39 pre-installed with the locking device 8 is assembled to the main housing 31, and the first seal 318 is arranged between the main housing 31 and the end cover 39 to provide a seal therebetween. Subsequently, the electronic control unit 4 is assembled to the main module 3, and the end cover 39 has a port for connecting the electromagnet 82 to the electronic control unit 4, around which a second seal 396 is arranged. The main housing 31 also has a port facing the electronic control unit, wherein the output shaft 11 of the brake motor is exposed, on which a position sensor can be arranged, so that the angular position of the output shaft is monitored by the electronic control unit 4. The additional opening 310 can be used, for example, to arrange the line connecting the brake motor 1 and the electronic control unit 4. The third seal 317 surrounds the output shaft 11 of the brake motor 1 and the opening 310 to provide additional sealing. It can be seen from the above structure that the electronic mechanical brake according to the first embodiment of the present invention has a compact structure, a reasonable layout, convenient assembly, and a modular design that facilitates subsequent maintenance.

[0041] Continue to refer Figures 17 to 27 Next, the second embodiment of the present invention is introduced. In this second embodiment, only the back plate 40 of the electronic control unit is used to replace the electronic control unit 4, and other identical components are marked with the same reference numerals. In this embodiment, the second end of the main housing 31 of the main module 3 has a cylindrical recess, and the end cover 39 is also configured to be roughly disc-shaped. In this embodiment, the locking device 8 is also basically integrated in the end cover 39, and the actuating member, i.e., the electromagnet 82, is provided at the main housing 31. Specifically, an electromagnet cavity 318 is provided at the side wall of the cylindrical recess, and the electromagnet 82 is accommodated in the electromagnet cavity 318. The end cover 39 also has a wall 399 ( Fig. 20 ) so that the electromagnet 82 is between and in contact with the main housing 31 and the end cap 39 when installed in place. Fig.19 When the electromagnet 82 is installed in place, its execution end 821 faces the rotating rod 81 , and the connection port on the back side of the electromagnet 82 faces the electronic control unit 4 .

[0042] Continue to refer Fig. 20, where it can be seen that the inner side of the end cover 39 has a mounting hole 390 for arranging the rotating shaft 83 of the rotating rod, and openings 397, 398 for arranging the first positioning pin 68 and the second positioning pin 69. In addition, the inner side of the end cover 39 also has a plurality of reinforcing ribs diverging from the mounting hole 390. One end of the rotating shaft 83 is fitted into the mounting hole 390, and passes through the shaft hole 810 of the rotating rod 81, and is axially positioned by the snap ring 833. The folding spring 843 is mounted on the first positioning pin 68 and the second positioning pin 69. Specifically, the first end 844 of the folding spring 843 is fixed to the first positioning pin 68, the bent portion 845 thereof bypasses the second positioning pin 69, and the second end 846 thereof abuts against the rotating rod, and the second end 846 is formed, for example, as a tiger's mouth or a collar to better support the arm of the rotating rod connected to the operating end 811.

[0043] Continue to refer Fig.21 , which shows the specific structure of the rotating rod 81. The rotating rod 81 includes a first arm 812, a second arm 813 and a third arm 814 extending from the shaft hole 810 in three directions. The ends of the first arm 812, the second arm 813 and the third arm 814 extend axially to form an operating end 811, an action end 819 and a counterweight 818, respectively. The operating end 811 is used to interact with the ratchet 33 in the manner detailed above in conjunction with the first embodiment. The action end 819 receives the thrust of the electromagnet 82, and the counterweight 818 is arranged to make the center of gravity of the rotating rod close to the pivot center. Figure 21 to Figure 25 It can be seen that, with the rotation plane of the ratchet 33 as the first plane, the rotating rod 81 rotates in a second plane parallel to the first plane, and the second plane is further away from the brake caliper module 5. In some embodiments, the rotating rod 81 at least partially overlaps with the ratchet 33 in the axial direction, and its operating end 811, the action end 819 and the counterweight portion 818 extend axially from the second plane to the first plane respectively and are located radially outside the ratchet. More specifically, the action end 819 and the counterweight portion 818 are always located radially outside the ratchet 33 during the rotation of the rotating rod in the idle position and the working position, and the interaction mode between the operating end 811 and the ratchet teeth of the ratchet is basically the same as that described in the first embodiment, and will not be repeated here. Through this arrangement, the locking device 8 can only increase the size of the main module 1 by a small amount in the axial direction, without increasing the size in other directions, making the main module 1 more compact.

[0044] Continue to refer Fig.26 and Fig. 27 The end cap 39 is disc-shaped and can be fitted into the cylindrical recess of the main housing 31, and the seal 691 is provided between the two. Similarly, the connection port of the electromagnet 82 and the end of the motor output shaft extend to the electronic control unit 4.

[0045] Continue to refer Figures 28 to 36In this embodiment, the adapter 41 is provided between the electronic control unit 4 and the electromagnet 82 and the brake motor 1. In some embodiments, such as Fig.36 As shown, the adapter 41 may include a clamping portion 43 for receiving the electromagnet 82. The adapter 41 also includes a plurality of positioning mounting holes 441. In addition, the adapter 41 also includes a socket 610 at the back facing the electronic control unit 4, two terminals 611 connected to the electromagnet and three terminals 612 connected to the three-phase brake motor 1.

[0046] refer to Fig.30 and Fig.31 , wherein a locking device combined with the end cap 39 and a separate locking device are shown. In some embodiments, the end cap 39 is designed with at least one positioning column 395, which is inserted into the mounting hole of the main housing to withstand the reaction force received by the end cap when the ratchet and the rotating rod are interlocked. In addition, in this third embodiment, the reset member is similar to the second embodiment, using a folding spring, and the rotating shaft 83 is constructed to have a first column portion 837, a second column portion 838 and a transition portion 839 because it is impossible to open an opening at a corresponding position on the main housing. The first column portion 837 and the second column portion 838 are offset and connected by the transition portion 839. The first column portion 837 passes through the positioning pad 63 and is inserted into the opening on the end cap, and the second column portion 838 is inserted into the positioning hole 315 of the main housing 31. The positioning hole 315 is configured to accommodate both the second column portion 838 and the transition portion 839, thereby inhibiting the rotation of the rotating shaft 83. The rotating shaft 83 passes through the rotating rod 81, and the operating end 811 of the rotating rod 81 interacts with the ratchet 33 in the manner described in detail above in conjunction with the first embodiment. Figures 37 to 45 The electronic mechanical brake 100 according to the fourth embodiment of the present invention is introduced. The electronic mechanical brake 100 is modularly designed and generally includes a brake motor 1, a main module 3, a brake module 5 and an electronic control unit 4. The electronic control unit 4 can be connected to the brake motor 1 and the actuating mechanism of the locking device 8, such as an electromagnet, via an adapter 41. The main module 3 may include a main housing 31 and an end cover 39, in which a main shaft 301 connected to the brake motor 1 may be accommodated, and the main shaft 301 rotates in a first direction under the drive of the brake motor 1 to drive the brake module 5 to perform a braking operation, that is, frictionally contact with the brake disc 95, wherein a ratchet 33 is fixedly arranged on the main shaft 301.

[0047] Furthermore, if Fig.38As shown, the electromechanical brake according to the present invention comprises a main module 3, a brake module 5 mounted at the far end of the main module 3. The main module 3 comprises a main housing 31 and an end cover 39, and the main module 3 accommodates a main shaft 301, a ball screw nut mechanism 304, a ratchet 33, a worm wheel 32, a locking device 8 and an adapter 41. The first end of the main housing 31 is connected to the brake module 5, and the second end of the main housing 31 opposite to the first end is closed by the end cover 39. The brake motor 1 and the electronic control unit 4 are integrated at the opposite side of the main module 3, and the output shaft of the brake motor 1 is inserted into the main housing 31 to engage with the worm wheel on the main shaft 301, and the end of the output shaft can 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 should be understood that the operation of the brake motor 1 and the actuating member of the locking mechanism 8 is controlled by the electronic control unit 4, and the electronic control unit 4 can be connected to the brake motor 1 and the electromagnet 82 through the adapter 41, for example.

[0048] Continue to refer Fig.39 and Fig.40 , which shows a stereoscopic view of the assembled state and the disassembled state of the locking device 8. The locking device 8 includes: a locking device housing 89, a rotating rod 81 connected to the locking device housing 89 through a rotating shaft 83, the rotating rod 81 including an operating end 811, the rotating rod 81 can rotate between an idle position and a working position, in the idle position, the operating end 811 of the rotating rod 81 is separated from the ratchet 33, and in the working position, the operating end 811 of the rotating rod 81 is interlocked with the ratchet 33. The locking device 8 also includes an actuating member and a reset member, the actuating member prompts the rotating rod 81 to rotate from the idle position to the working position, and the reset member prompts the rotating rod 81 to return from the working position to the idle position. The ratchet 33 and the operating end 811 of the rotating rod are arranged so that when in the working position, the operating end 811 interacts with the ratchet 33 to prevent the ratchet 33 from rotating in a second direction opposite to the first direction, and prevents the rotating rod 81 from rotating to the idle position.

[0049] In some embodiments, the locking device housing 89 includes a first cavity 891 for accommodating the actuating member and a second cavity 890 for accommodating the rotating shaft 83, the rotating rod 81 and the reset member. In some embodiments, the actuating member is an electromagnet 82. The electromagnet 82 may have a generally cylindrical shape and include a terminal 822 for electrical connection and an actuating end 821 for performing linear displacement (see Fig.44 ). The first cavity 891 can be configured to match the shape of the electromagnet 82, for example, the first cavity 891 can be configured as a cylindrical cavity that matches the cylindrical electromagnet. In alternative embodiments, the actuating member can adopt any other suitable structure, and the shape of the first cavity 891 can also be adaptively modified. In alternative embodiments, the actuating member can be any other component that can drive the rotating rod to move.

[0050] In some embodiments, the first cavity 891 and the second cavity 890 are separated by an intermediate wall 8971, and the intermediate wall 8971 has an opening 897 that allows the actuating end 821 of the electromagnet 82 to pass through. The actuating end 821 of the electromagnet 82 can translate through the opening 897, thereby acting on the rotating rod 81 to be described in detail below. Fig.39 As shown, the electromagnet 82 can be inserted into the first cavity 891 from the end of the first cavity 891 opposite to the middle wall 8971 , and the shape of the first cavity 891 radially limits the electromagnet 82 .

[0051] In some embodiments, the second cavity 890 includes opposite walls 893, 894, and the rotating shaft 83 is connected between the mounting holes 892 of the opposite walls 893, 894, for example, by riveting or other connection methods. The rotating rod 81 includes an axial hole 810 so as to be sleeved on the rotating shaft 83. In addition, in some embodiments, washers 931, 932 may also be provided, and the washers 931, 932 are also sleeved on both sides of the rotating rod 81 on the rotating shaft 83, thereby being arranged between the rotating rod 81 and the opposite walls 893, 894 to axially limit the rotating rod 81. In some embodiments, the rotating rod 81 includes a recessed portion 913 corresponding to the washers 931, 932. The washers 931, 932 may be made of suitable materials such as plastic, rubber or metal.

[0052] In some embodiments, the reset member is a folding spring 843, and is mounted on a pin 899 extending from opposite walls 893, 894. In the illustrated embodiment, there are two pins 899 connected to the upper wall 893, and the folding spring 843 includes 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 rod, and the second end 846 can be sleeved on the rotating rod 81 near the operating end 811, thereby providing a reset force through the elastic force of the folding spring 843. In alternative embodiments, the reset member can also be a coil spring, a disc spring, etc., which is mounted to the locking device housing and applies an elastic force to the rotating rod 81. In some embodiments, the second end 846 of the folding spring 843 is configured with a barb 8431, so as to limit the rotating rod 81 and prevent the rotating rod 81 from being separated from the second end 846 when subjected to vibration or impact.

[0053] In some embodiments, the locking device 8 further includes a stop pin 85 extending from one of the opposite walls 893, 894, and the stop pin 85 is configured to limit the rotation rod 81 when the rotation rod 81 returns from the working position to the idle position under the action of a reset member such as a folding spring 843. In some embodiments, the stop pin 85 is wrapped with a buffer sleeve 851, such as a rubber layer, thereby avoiding noise generated when the rotation rod 81 collides with the stop pin 85.

[0054] In some embodiments, the rotating rod 81 includes an action end 819 in contact with the actuating member, which, for example, contacts with the execution end 821 of the electromagnet 82 to receive the power to drive the rotating rod 81 to rotate, and the shaft hole 810 of the rotating rod 81 is located between the operating end 811 and the action end 819. In order to make the overall structure of the locking device 8 compact, the action end 819 is closer to the shaft hole 810 than the operating end 811, so that the force arm for the electromagnet 82 is shorter, so 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 so that the center of gravity of the rotating rod 81 is located near the shaft hole 810, thereby reducing the requirement for the capacity of the electromagnet 82. On the other hand, in some embodiments, the operating end 811 includes an axial extension extending perpendicular to the rotation plane of the rotating rod 81, thereby interacting with the ratchet 33. In alternative embodiments, the operating end 811 may have any structure that can interlock with the ratchet 33, such as a pawl, a hook or a pin.

[0055] like Figure 40 to Figure 42 As shown, the locking device 8 is first preassembled, including assembling the electromagnet 82, the rotating rod 81, the folding spring 843 and the stop pin 85 to the locking device housing 89. In this state, when the execution end 821 of the electromagnet 82 is extended or retracted based on the control signal, the rotating rod 81 will correspondingly rotate in the aa direction in the plane with the rotating shaft 83 as the center, that is, corresponding to the rotation between the idle position and the working position. After being installed in place, the rotation range of the rotating rod 81 is limited by the stop pin 85 and the ratchet 33.

[0056] The preassembled locking device 8 is installed in the main housing 31. In some embodiments, the locking device housing 89 of the locking device 8 may include a stop feature that cooperates with the main housing 31, for example, the wall 894 may include a protrusion 895, which is aligned with and cooperates with the notch 310 on a platform of the main housing 31, and the stop feature ensures that the locking device 8 can remain positioned when subjected to the reaction force of the ratchet 33. In addition, the locking device housing 89 also includes a bolt hole 896 to connect with the bolt 91 passing 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 of one end where the actuating member is located, which are aligned with the opening 319 on the main housing 31, and the bolt 91 passes through the opening 319 and is connected to the bolt hole 896 of the locking device housing 89. The stop feature and the bolt fastening cooperate to fix the locking device 8 in the main housing 31. In an alternative embodiment, the locking device 8 as a whole may also be fixed in the main housing 31 by other suitable means, such as a snap connection, cooperation of fasteners or glue with limiting features, etc.

[0057] from Fig.41 and Fig.43As can be seen in the figure, the adapter 41 is also installed in the main housing 31, wherein the adapter 41 includes a socket 610, and the socket 610 is exposed to the end surface of the main housing 31 facing the electronic control unit 4 for connecting to the adapter when the electronic control unit 4 is installed. At the same time, the adapter also includes a plurality of terminals 611, 612, wherein a portion 611 of the plurality of terminals is used to connect to the actuating mechanism of the locking device 8, and another portion 612 of the plurality of terminals is connected to the brake motor 1. The actuating member, such as the 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. Fig.43 In the illustrated embodiment, when assembled in the main housing 31, the terminal 822 of the electromagnet 82 faces the end cap 39 of the main housing, and the wire can be welded between the terminal 822 of the electromagnet and the terminal 611 of the adapter 41. Fig.44 and Fig.45 As shown, in an alternative embodiment, the terminal 822 of the electromagnet 82 may also be disposed at the same end as the actuating end 821 , and when assembled in the main housing 31 , the terminal 822 of the electromagnet 82 faces the adapter 41 .

[0058] The electronic brake device according to the embodiment can work as follows: during normal driving, the electronic control unit 4 controls the brake motor 1 to rotate based on the stroke or input force of the brake pedal so that the main shaft 301 rotates in a first direction, thereby driving the brake module 5 to apply a braking torque corresponding to the brake pedal stroke or input force. During this process, the rotating rod 81 of the locking device is always maintained in an idle position by the reset component. In the control of the parking brake condition, when a parking brake signal (such as a hand brake or an electronic hand brake) is received, the electronic control unit 4 controls the brake motor 1 to rotate so that the main shaft 301 rotates in a first direction, thereby driving the brake module 5 to establish a predetermined braking torque, that is, the brake caliper clamps the brake disc 95. Subsequently, the electronic control unit 4 controls the actuating component to act on the rotating rod 81 to rotate from the idle position to the working position, such as Fig.45As shown by the middle arrow a, at this time, the operating end 811 of the rotating rod 81 may not be aligned with the ratchet teeth 331 of the ratchet 33, so the brake motor 1 is controlled to rotate slightly in the second direction (for example, the position of one tooth) so that the operating end 811 of the rotating rod moves to the working position to interlock with the ratchet teeth 331 of the ratchet 33 (stuck in the gap 330 between the ratchet teeth 331). At this time, the electromagnet 82 and the brake motor 1 can be powered off. Since in the working position, the ratchet 33 and the operating end 811 of the rotating rod are configured so that the operating end 811 interacts with the ratchet 33 to prevent the ratchet 33 from rotating in a second direction opposite to the first direction, and prevents the rotating rod 81 from rotating toward the idle position. Therefore, even if the electromagnet 82 and the brake motor 1 are powered off, the brake module 5 can still maintain the braking torque, which makes it unnecessary for the electromagnet 82 to keep working under the parking brake condition, 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 drive the main shaft 301 to rotate slightly in the first direction. Due to the design of the ratchet 331, the rotation of the ratchet 33 in the first direction will release the rotating rod 81, and the reset member will return the rotating rod 81 to the idle position until the next parking brake.

[0059] The above describes the electronic mechanical brake according to various embodiments of the present invention. For the design of the locking device in each of the above embodiments, an important factor is its size. Figure 1 As mentioned above, due to the limitation of the layout space of the electronic mechanical brake itself, the size of the locking device for realizing the parking brake function is required to be as small as possible. The design of the rotating rod of the locking device is particularly important, which is also closely related to the size of the electromagnet. On the one hand, it is desired that the displacement of the actuator end 821 of the electromagnet 82 is as small as possible while ensuring sufficient displacement of the operating end. Therefore, in some embodiments, such as Fig.14 As shown, the locking device is configured so that during the movement of the rotating rod 81 from the idle position to the working position, the moving distance c of the operating end 811 of the rotating rod 81 is more than 3 times the moving distance d of the active end 819 of the rotating rod 81. In some embodiments, the moving distance c of the operating end 811 of the rotating rod 81 is more than 5 times the moving distance d of the active end 819 of the rotating rod 81, for example, c is about 0.8 mm, and d is more than 4.5 mm. Figure 8 In the illustrated embodiment, the active end 819 and the operating end 811 are on the same side of the shaft hole 810, but in other embodiments, the active end 819 and the operating end 811 are on opposite sides of the shaft hole 810. The above displacement ratio can be achieved by setting the position of the active end to the rotation axis, for example, making the active end 819 close to the rotation axis, i.e., the shaft hole 810. A smaller displacement of the active end 819 corresponds to a smaller displacement and a smaller size of the electromagnet 82.

[0060] In some embodiments, the rotating rod 81 further includes a weight portion 818 located at a second side of the shaft hole 810 opposite to the first side, so that the center of gravity of the rotating rod 81 is near the shaft hole 810. In some embodiments, the distance from the center of gravity of the rotating rod 81 to the shaft hole 810 is less than 1 cm. Making the center of gravity of the rotating rod 81 close to the rotation center of gravity can make the rotating rod 81 rotate under a smaller actuating force. In order to reduce the displacement, the action end 819 is closer to the rotation center, which will result in a smaller torque of the actuating force. Adding the weight portion 818 enables such a smaller torque to ensure the rotation of the rotating rod 81. The weight portion 818 can be implemented in a variety of ways, but in order not to significantly increase the volume, its material can be changed, such as selecting a heavier metal, or constructing an extension along the axial direction to increase the weight. In order not to significantly increase the volume, the maximum distance from the operating end 811 to the rotating shaft 83 is more than 3 times, for example, more than 5 times, the maximum distance from the weight portion 818 to the rotating shaft 83, so the weight portion has a smaller radial dimension, and the weight is mainly achieved by extending along the axial direction. Taking the third and fourth embodiments as examples, the counterweight portion 818 is disposed on the action end 819 and extends axially from the action end 819 to both ends, so that the action end 819 has a greater thickness than the operation end. In the second embodiment, the rotating rod 81 includes a first arm 812, a second arm 813 and a third arm 814 extending from the shaft hole 810 in three directions, and the ends of the first arm 812, the second arm 813 and the third arm 814 are respectively configured as the operation end 811, the action end 819 and the counterweight portion 818. In each embodiment, the operation end 811, the action end 819 and / or the counterweight portion 818 have an axial extension portion extending in the axial direction.

[0061] In addition, for each embodiment, the locking device 8 can be pre-assembled separately, wherein the end cap 39 can be used as a bracket for each part, or a separate locking device housing 89 can be used as a bracket for each part as shown in the fourth embodiment. With this arrangement, the locking device 8 can be pre-assembled on a separate production line and easily installed into or assembled with the main housing produced by another production line, which avoids the problem of a single production line being too long.

[0062] The electronic mechanical brake according to the present application has a compact structure, and during parking braking, the actuating mechanism of the locking device does not need to be energized, thereby avoiding failure due to long-term energization. On the other hand, the special design of the rotating rod reduces the requirements for the electromagnet capacity and volume.

[0063] The specific embodiments described above in this application are only for more clearly describing the principles of this application, wherein each component is clearly shown or described to make the principles of the present invention easier to understand. Without departing from 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 should be included in the scope of patent protection of this application.

Claims

1. A locking device for an electromechanical brake, characterized in that: include: Bracket; A rotating rod (81), the rotating rod (81) comprising an operating end (811) for interlocking with the ratchet (33) of the electronic mechanical brake, the rotating rod (81) being connected to the bracket via a rotating shaft (83), so that the rotating rod (81) can rotate between an idle position and a working position with the rotating shaft (83) as a rotation axis; an electromagnet (82), the electromagnet (82) acting on an action end (819) of the rotating rod (81), thereby causing the rotating rod (81) to rotate from the idle position to the working position; A reset component, which causes the rotating rod (81) to return from the working position to the idle position; wherein the locking device is configured so that during the movement of the rotating rod (81) from the idle position to the working position, the movement distance c of the operating end (811) of the rotating rod (81) is more than 3 times the movement distance d of the active end (819) of the rotating rod (81), and optionally, the movement distance c of the operating end (811) of the rotating rod (81) is more than 5 times the movement distance d of the active end (819) of the rotating rod (81).

2. The locking device according to claim 1, characterized in that: The operating end (811) is located on a first side of an axial hole (810) that cooperates with the rotating shaft (83), and the rotating rod (81) also includes a counterweight portion (818) located on a second side of the axial hole (810) opposite to the first side, so that the center of gravity of the rotating rod (81) is near the axial hole (810). Optionally, the distance from the center of gravity of the rotating rod (81) to the axial hole (810) is less than 1 cm.

3. The locking device according to claim 2, characterized in that: The counterweight portion (818) is arranged on the action end (819), or the rotating rod (81) includes a first arm (812), a second arm (813) and a third arm (814) extending from the axial hole (810) in three directions, and the ends of the first arm (812), the second arm (813) and the third arm (814) are respectively configured to form the operating end (811), the action end (819) and the counterweight portion (818); wherein the operating end (811), the action end (819) and / or the counterweight portion (818) have an axial extension portion extending along the axial direction.

4. The locking device according to claim 1, characterized in that: The maximum distance from the operating end (811) to the rotating shaft (83) is more than three times the maximum distance from the counterweight portion (818) to the rotating shaft (83). Optionally, the maximum distance from the operating 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, characterized in that: The bracket is an independent locking device housing (89), the rotating rod (81) is connected to the locking device housing (89) through the rotating shaft (83), and the locking device housing (89) includes a first cavity (891) accommodating the electromagnet (82) and a second cavity (890) accommodating the rotating shaft (83), the rotating rod (81) and the reset member.

6. The locking device according to claim 5, characterized in that: The first cavity (891) is configured to match the outer shape of the electromagnet (82), and the first cavity (891) and the second cavity (890) are separated by an intermediate wall (8970), and the intermediate wall (8970) has an opening (897) allowing the actuating end (821) of the electromagnet (82) to pass through; wherein the second cavity (890) includes opposite walls (893, 894), and the rotating shaft (83) is connected to the mounting hole (892) of the opposite walls (893, 894), wherein the rotating rod (81) is sleeved on the rotating shaft (83) and washers (931, 932) are arranged between the rotating rod (81) and the opposite walls (893, 894) to limit the axial position of the rotating rod (81).

7. The locking device according to claim 5, characterized in that: The reset member is a folding spring (843) and is mounted on a pin (899) extending from the relative walls (893, 894); wherein the folding spring (843) includes 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 rod; wherein the locking device (8) also includes a stop pin (85) extending from the relative walls (893, 894), wherein the stop pin (85) is configured to limit the rotating rod (81) when the rotating rod (81) returns from the working position to the idle position, wherein the stop pin (85) is wrapped with a buffer sleeve (851).

8. The locking device according to any one of claims 1 to 4, characterized in that: The bracket constitutes an end cover (39) of a main module (3) of the electronic mechanical brake, and the end cover (39) has an additional cavity (391) for accommodating an electromagnet (82), and the electromagnet (82) is arranged in the additional cavity (391), wherein one end of a rotating shaft (83) of the rotating rod (81) is arranged in an opening (392) of the end cover, the rotating rod (81) is rotatably fixed to the rotating shaft (83), and the reset member is a torsion spring (84) arranged on the rotating shaft (83), the first end (841) of the torsion spring (84) abuts against the hook portion (817) of the rotating rod, and the second end (842) of the torsion spring is fixed.

9. An electromechanical brake, characterized in that: include: Brake motor (1); a main shaft (301) connected to the brake motor, the main shaft (301) being driven by the brake motor to rotate in a first direction to drive the brake module (5) to perform a braking operation, wherein a ratchet (33) is fixedly arranged on the main shaft (301); as well as The locking device (8) according to any one of claims 1 to 8, wherein when the rotating rod of the locking device (8) is in an idle position, the operating end (811) is separated from the ratchet (33), and when the rotating rod of the locking device (8) is in a working position, the operating end (811) is interlocked with the ratchet (33); The ratchet (33) and the operating end (811) of the rotating rod are arranged so that when in the working position, the operating end (811) interacts with the ratchet (33) to prevent the ratchet (33) from rotating in a second direction opposite to the first direction, and prevents the rotating rod (81) from rotating toward the idle position.

10. The electromechanical brake according to claim 9, characterized in that The main shaft (301) comprises a front end (302) and a rear end (303) opposite to each other, the front end (302) of the main shaft is coupled to the brake module (5) via a ball screw nut mechanism (304), the ratchet (33) is fixedly mounted on the rear end (303) of the main shaft (301), and a worm gear (32) is also fixedly arranged in the middle section between the front end (302) and the rear end (303) of the main shaft (301), wherein the output shaft (11) of the brake motor (1) is constructed as a worm that meshes with the worm gear (32) on the main shaft (301); The electronic mechanical 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 cover (39); the main shaft (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 cover (39); a first end of the main housing (31) is connected to the brake module (5); a second end of the main housing (31) opposite to the first end is closed by the end cover (39); the brake motor (1) and the electronic control unit (4) are connected to the main housing (31) from opposite sides of the main housing (31); The locking device (8) is pre-assembled and installed to the main housing (31), wherein the locking device housing (89) of the locking device (8) includes a limiting feature that cooperates with the main housing (31), and the locking device housing (89) also includes a bolt hole (896) for connecting with a bolt (91) passing through the wall of the main housing (31).

11. The electromechanical brake according to claim 10, characterized in that The electronic mechanical brake also includes an adapter (41) installed in the main housing (31), and the electronic control unit (4) is electrically connected to the electromagnet (82) and the brake motor (1) respectively through the adapter (41), and the electromagnet (82) includes a terminal (822) connected to the adapter, and the terminal (822) faces the adapter (41), or the terminal faces the end cover (39).

Images