Electromechanical brake

Abstract

The application provides an electromechanical brake. The electromechanical brake comprises a main brake module, a brake caliper module and a clasp; wherein when the main brake module and the brake caliper module are assembled, a protrusion of the main brake module is inserted into a recess of the brake caliper module in an axial direction, the clasp is compressed at the first slot, so that the clasp can be inserted along with the protrusion, and the clasp is unfolded when the first slot and the second slot are aligned, so as to limit the relative position of the main brake module and the brake caliper module in the axial direction. The electromechanical brake according to the embodiment can realize easy assembly and / or disassembly between the main brake module and the brake caliper module.

Description

Technical Field

[0001] This application relates to the field of braking devices, and more specifically, to an electromechanical brake. Background Technology

[0002] Electromechanical brakes are devices that achieve braking by using a motor to drive the brake caliper. Compared to traditional hydraulic brakes, they offer advantages such as faster response, simpler structure, and easier maintenance. With the increasing electrification and intelligence of vehicles, electromechanical brakes are becoming a development trend in braking systems due to their easier integration with electric control systems.

[0003] Electromechanical brakes generally consist of a main braking module and a brake caliper module. The main braking module includes a brake motor, transmission mechanism, and control unit, while the brake caliper module includes a housing and friction pad support, etc. The main braking module and brake caliper module need to be fixed together when assembled, and are difficult to disassemble after assembly. Utility Model Content

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

[0005] According to one aspect, an electromechanical brake is provided, comprising:

[0006] A main braking module, the main braking module including a protrusion having a first groove;

[0007] A brake caliper module, the brake caliper module including a recess that mates with a protrusion of the main brake module, the recess having a second groove; and

[0008] A retaining ring, the retaining ring being annular and having a notch, the retaining ring having a first end and a second end located on both sides of the notch, the retaining ring being compressible by bringing the first end and the second end closer to each other, wherein the first end and the second end each have a engagement portion for engaging with an external tool, so as to bring the first end and the second end closer to each other by means of an external tool;

[0009] During the assembly of the main braking module and the brake caliper module, the protrusion of the main braking module is inserted axially into the recess of the brake caliper module, and the retaining ring is compressed at the first groove so that the retaining ring can be inserted with the protrusion. The retaining ring unfolds when the first groove and the second groove are aligned to restrict the relative position of the main braking module and the brake caliper module in the axial direction.

[0010] Optionally, in an embodiment of the electromechanical brake, the engagement portion at the first end of the retaining ring is formed as a first outwardly open slot, and the engagement portion at the second end of the retaining ring is formed as a second outwardly open slot.

[0011] Optionally, in an embodiment of the electromechanical brake, the brake caliper module further includes an operation hole extending from the outer peripheral surface of the brake caliper module to the second groove. The operation hole corresponds to the position of the first end and the second end of the retaining ring, such that the positions of the first end and the second end of the retaining ring can be accessed through the operation hole.

[0012] Optionally, in an embodiment of the electromechanical brake, the operating hole includes a first section axially aligned with the second groove and a second section located on the end face side of the first section, the first section having a width greater than that of the second section, wherein the second section has a width that gradually decreases toward the end face.

[0013] Optionally, the operating hole may also consist of only the first section. In this case, the length of the first section along the axial direction may be appropriately increased to facilitate the movement of external tools along the axial direction during operation.

[0014] Optionally, in an embodiment of the electromechanical brake, the electromechanical brake further includes a plug that seals the operating hole. The plug includes a cover and a plug body. When the plug is installed into the operating hole, the plug body is inserted into the operating hole and the cover is located outside the operating hole.

[0015] Optionally, in an embodiment of the electromechanical brake, the cover is sheet-shaped 3 and has an embedded metal frame.

[0016] Optionally, in an embodiment of the electromechanical brake, the sidewall of the operating hole includes one or more slots, and the plug body has one or more engaging portions that engage with the one or more slots when inserted into the operating hole;

[0017] The plug body is integral and has one or more blind holes to allow the plug body to be compressed, or the plug body is composed of multiple separate guides, and the snap-fit ​​portion is provided on the outer side of a pair of the multiple separate guides.

[0018] Optionally, in an embodiment of the electromechanical brake, the brake caliper module further includes an observation hole extending from the outer peripheral surface of the brake caliper module to the second groove.

[0019] Optionally, in an embodiment of the electromechanical brake, the electromechanical brake further includes an elastic member disposed between the outer end face of the notch of the brake caliper module and the shoulder of the protrusion of the main brake module, wherein the elastic member is a disc spring and is axially compressed when the main brake module is assembled with the brake caliper module, wherein the outer end face of the brake caliper module supports the entire annular elastic member.

[0020] Optionally, in an embodiment of the electromechanical brake, the protrusion includes a cylindrical outer wall and a retractable end wall, the first groove and the shoulder being disposed along the outer periphery of the cylindrical outer wall, wherein the cylindrical outer wall internally accommodates a ball screw mechanism, and the retractable end wall is connected to the ball screw mechanism.

[0021] Optionally, in the embodiment of the electromechanical brake, the brake caliper module includes: a housing and a friction pad support, the housing defining the notch and being axially slidably supported on the friction pad support, the first friction pad and the second friction pad being disposed on the friction pad support, wherein the notch communicates with the first friction pad, such that the end wall can act on the first friction pad.

[0022] The electromechanical brake according to the embodiment enables easy assembly and / or disassembly between the main braking module and the brake caliper module. Attached Figure Description

[0023] The disclosure of this application will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the drawings are used to denote similar components, wherein:

[0024] Figure 1 An exploded view of the electromechanical brake according to an embodiment being assembled to a wheel hub is shown;

[0025] Figure 2 A perspective view of an electromechanical brake according to an embodiment is shown;

[0026] Figure 3 An exploded view of an electromechanical brake according to an embodiment is shown;

[0027] Figure 4 A bottom view of the brake caliper module of the electromechanical brake according to an embodiment is shown;

[0028] Figure 5 A perspective view of the retaining ring of the electromechanical brake according to an embodiment is shown;

[0029] Figure 6A schematic diagram of the retaining ring of the electromechanical brake according to an embodiment is shown when it is operated by an external tool;

[0030] Figure 7 A longitudinal cross-sectional view of an electromechanical brake according to an embodiment is shown;

[0031] Figure 8 It shows Figure 7 An enlarged view of the retaining ring section;

[0032] Figure 9 A side view of an electromechanical brake according to an embodiment is shown;

[0033] Figure 10 It shows Figure 9 A cross-sectional view of section AA in the diagram;

[0034] Figure 11 A bottom view of the brake caliper module of the electromechanical brake with the circlip installed is shown;

[0035] Figure 12 yes Figure 11 A magnified view of area B in the middle;

[0036] Figure 13 A front view of the brake caliper module of the electromechanical brake with the circlip installed is shown;

[0037] Figure 14 yes Figure 13 A magnified view of area C in the middle;

[0038] Figure 15 A longitudinal section view of the electromechanical brake according to an embodiment is shown during disassembly.

[0039] Figure 16 A longitudinal cross-sectional view of the brake caliper module of the electromechanical brake according to an embodiment is shown;

[0040] Figure 17 yes Figure 16 A magnified view of region D in the middle;

[0041] Figure 18 and Figure 19 These are perspective views of the plug from different angles according to the embodiments;

[0042] Figure 20 This is a longitudinal cross-sectional view of the brake caliper module when the piston is installed.

[0043] Figure 21 This is a cross-sectional view of the brake caliper module when the plug is installed.

[0044] Figure 22 This is a cross-sectional view of the plug according to another embodiment;

[0045] Figure 23 A perspective view of a plug according to another embodiment; and

[0046] Figure 24 and Figure 25 It is an installation device for the plug according to the embodiment. Detailed Implementation

[0047] Figure 1 An installation diagram of an electromechanical brake is shown, illustrating a shaft 91, a shock absorber 92, a bearing 94, a steering knuckle arm 93, a brake disc 95, and a wheel 96, as well as an electromechanical brake 100 according to an embodiment, which is driven by a motor to provide braking force by clamping the brake disc 95 with a brake caliper. During assembly, the electromechanical brake 100 is mounted on the steering knuckle arm 93, and is also housed within a compact space inside the wheel hub of the wheel 96, thus imposing strict limitations on the volume of the electromechanical brake 100 itself.

[0048] Continue to refer to Figures 2 to 15An electromechanical brake according to an embodiment is described below. The electromechanical brake includes a main brake module 2, a brake caliper module 1, and a retaining ring 3, wherein the main brake module 2 and the brake caliper module 1 are assembled by the retaining ring 3. The main brake module 2 includes a protrusion 20, which may be generally cylindrical and has a first groove 201. The brake caliper module 1 includes a recess 10 that mates with the protrusion 20 of the main brake module 2, and the recess 10 has a second groove 15. The retaining ring 3 is generally annular and has a notch 31, i.e., the retaining ring 3 is an open annular shape. The retaining ring 3 has a first end 32 and a second end 33 located on both sides of the notch 31. The retaining ring 3 can be compressed by bringing the first end 32 and the second end 33 close to each other, wherein the first end 32 and the second end 33 each have a engagement portion for engaging with an external tool to bring the first end 32 and the second end 33 close to each other by means of an external tool. During the assembly of the main brake module 2 and the brake caliper module 1, the protrusion 20 of the main brake module 2 is axially inserted into the recess 10 of the brake caliper module 1. The retaining ring 3 is pre-installed into the first groove 201 of the protrusion 20 of the main brake module 2. Subsequently, an external tool is used to bring the first end 32 and the second end 33 closer together, compressing the retaining ring 3 within the first groove 201. The compressed retaining ring 3 has an outer diameter smaller than the inner diameter of the recess 10, allowing it to be inserted into the recess 10 of the brake caliper module 1 along with the protrusion 20 of the main brake module 2. During this insertion process, the annular portion of the retaining ring 3 is embedded in the first groove 201 of the protrusion 20, while the first end 32 and the second end 33 of the retaining ring 3 are held by the external tool until the retaining ring 3, along with the protrusion 20 of the main brake module 2, enters the recess 10. After this, the inner wall of the recess 10 holds the retaining ring 3, and the external tool can be removed. As the protrusion 20 of the main brake module 2 further inserts into the recess 10 of the brake caliper module 1, when the first groove 201 and the second groove 15 are aligned, the retaining ring 3 will unfold under its own elastic force to axially restrict the relative position of the main brake module 2 and the brake caliper module 1. It should be understood that although the retaining ring 3 unfolds at the second groove 15, the size of the second groove 15 can be designed to be smaller than the outer diameter of the retaining ring 3 in its natural state, so that the retaining ring 3 is still compressed at the second groove 15. Figure 7 and Figure 8 As shown, the second groove 15 cannot fully accommodate the retaining ring 3. In other words, when unfolded, the retaining ring 3 partially overlaps radially with both the first groove 201 and the second groove 15, thereby restricting the relative position of the main braking module 2 and the brake caliper module 1 axially. By providing the joint between the first end 32 and the second end 33 of the retaining ring 3, the retaining ring 3 can be easily compressed, thereby facilitating the assembly of the electromechanical brake.

[0049] like Figure 5 and Figure 6As shown, in some embodiments, the engaging portions of the first end 32 and the second end 33 of the retaining ring 3 are respectively formed as an outwardly open first slot 321 and a second slot 331. "Outwardly open" means that the first slot 321 and the second slot 331 can be accessed from the radially outer side of the retaining ring 3. Like retaining rings commonly found in the art, the retaining ring 3 may have a uniform cross-section, for example, rectangular in the figures, or alternatively circular, except at the engaging portions of the first end 32 and the second end 33. In the illustrated embodiment, the outer surfaces of the retaining ring are partially removed at the first end 32 and the second end 33 to form the first slot 321 and the second slot 331. It should be understood that the engaging portions of the first end 32 and the second end 33 of the retaining ring 3 may also employ any known engaging force-applying structure, such as a hook (…). Figure 6 c), small hole ( Figure 6 d) etc. For example Figure 6 As shown in (a)-6(b), under the action of the external tool 99, the first end 32 and the second end 33 can approach each other. The external tool 99 can be, for example, a clamp or tweezers, which may have a pair of operating ends to engage with the joints of the first end 32 and the second end 33 of the circlip 3 to provide clamping force. After the external tool is removed, the circlip 3 will return to its original position due to its own elasticity.

[0050] In some embodiments, such as Figure 3 As shown, in order to observe whether the retaining ring 3 is installed in place, the brake caliper module 1 may also include an observation hole 12 extending from the outer peripheral surface of the brake caliper module 1 to the second groove 15. In the illustrated embodiment, the observation hole 12 is located at the top of the brake caliper module 1.

[0051] In some embodiments, to facilitate the disassembly of the electromechanical brake, the brake caliper module 1 further includes an operation hole 11 extending from the outer peripheral surface of the brake caliper module 1 to the second groove 15. The operation hole 11 corresponds to the position of the first end 32 and the second end 33 of the retaining ring 3 during assembly. In the illustrated embodiment, the operation hole 11 is located at the bottom of the brake caliper module 1. For ease of operation, the operation hole 11 can be positioned on the outer peripheral surface of the brake caliper module 1 closest to the second groove 15.

[0052] refer to Figures 10 to 15In some embodiments, the operating hole 11 includes a first segment 111 axially aligned with the second groove 15 and the retaining ring 3 therein, and a second segment 112 located on the end face 19 side of the first segment 111. The first segment 111 has a width greater than that of the second segment 112, meaning that any position in the first segment 111 has a width greater than any position in the second segment 112. In some embodiments, the second segment 112 may have a width that gradually decreases towards the end face 19; for example, the second segment 112 may be trapezoidal. It should be understood that the width of the first segment 111 is set to be wider than the distance between the first end 32 and the second end 33 of the retaining ring 3 in the second groove 15 in its unfolded state, meaning that when the retaining ring 3 is unfolded in the second groove 15, the first end 32 and the second end 33 can be accessed through the first segment 111 of the operating hole 11. In some embodiments, the second segment 112 has a width narrower than the distance between the first end 32 and the second end 33 of the retaining ring 3 in the second groove 15 in its unfolded state. It should be understood that the second section 112 is provided so that during disassembly, external tools can keep the retaining ring 3 in a compressed state until the retaining ring 3 is disengaged from the second groove 15, thereby facilitating disassembly.

[0053] Optionally, the operating hole 11 may also consist only of the first segment 111, in which case the length of the first segment 111 in the axial direction is equal to or close to the length of the first segment 111. Figure 4 The length of the first segment 111 and the second segment 112 shown is the sum of their lengths along the axial direction. It should be understood that the extended first segment 111 is provided so that during disassembly, external tools can keep the retaining ring 3 in a compressed state until the retaining ring 3 disengages from the second groove 15, thereby facilitating disassembly.

[0054] like Figure 7 and Figure 8 As shown, further, in some embodiments, to achieve better axial limiting, the electromechanical brake also includes an elastic member 4, such as a disc spring, disposed between the outer end face 19 of the notch 10 of the brake caliper module 1 and the shoulder 29 of the protrusion 20 of the main brake module 2. This elastic member 4 is pressed together during the assembly of the brake caliper module 1 and the main brake module 2, thereby applying a thrust in the opposite axial direction to the brake caliper module 1 and the main brake module 2, thereby further limiting the axial movement between the brake caliper module 1 and the main brake module 2. More specifically, as... Figure 8 As shown, the elastic member 4 applies a rightward force to the protrusion 20 of the main braking module 2, while the retaining ring 3 abuts against the first groove 201, thereby restricting the main braking module 2 from moving to the right. This prevents the retaining ring 3 from moving within the first groove 201 and the second groove 15, and thus avoids vibration and noise caused by the retaining ring 3 moving within the second groove 15. Figure 3 As shown, the outer end face 19 of the brake caliper module 1 supports the entire annular elastic member 4, that is, it is in contact with the entire annular elastic member 4, and the contact position is a complete ring.

[0055] like Figure 15 As shown, when it is necessary to disassemble the brake caliper module 1 and the main brake module 2, a force F is applied to the brake caliper module 1 on the main brake module 2, causing the retaining ring 3 to separate from the wall of the second groove. The retaining ring 3 is no longer subjected to axial force. At this time, an external tool 99 can be used through the first section 111 of the operating hole 11 to act on the joint between the first end and the second end of the retaining ring 3 to easily compress the retaining ring 3 into the first groove 201. When the retaining ring 3 is compressed into the first groove 201, the force F can be released. At this time, the reaction force of the elastic member 4 will eject the main brake module 2 axially outward. The retaining ring 3 enters the recess 10 together with the protrusion 20 of the main brake module 2. The inner wall of the recess 10 will keep the retaining ring 3 in a compressed state. Then the external tool 99 can be removed, and the main brake module 2 can be taken out axially outward. In an alternative embodiment, the elastic member 4 can be set at any suitable position between the brake caliper module 1 and the main brake module 2, and can be selected from any suitable spring or elastic material, such as an elastic pad.

[0056] In some embodiments, the main braking module includes a brake motor, a transmission mechanism, and an electronic control unit, and the brake caliper module includes a housing and a friction pad support, etc. In some embodiments, the protrusion 20 includes a cylindrical outer wall 23 and a telescopic end wall 21, with a first groove 201 and a shoulder 29 disposed along the outer periphery of the cylindrical outer wall 23. In some embodiments, a ball screw mechanism is housed inside the cylindrical outer wall 23, and the telescopic end wall 21 is connected to the ball screw mechanism, thereby enabling its telescopic movement. Specifically, the ball screw mechanism may include a spindle 221, a plurality of balls 222, and a sleeve 223, the spindle 221 and the sleeve 223 being connected by means of the plurality of balls 222, and the sleeve 223 being further connected to the end wall 21, such that rotation of the motor-driven spindle 221 can be converted into telescopic movement of the end wall 21. The brake caliper module 1 includes a housing 101 and a friction pad support 102. A first friction pad 71 and a second friction pad 72 are disposed on the friction pad support 102. The friction pad support 102 is fixedly mounted near the wheel through mounting holes 103. After being fixedly connected to the main brake module 2, the housing 101 is axially slidably supported on the friction pad support 102. The notch 10 of the brake caliper module 1 communicates with the first friction pad 71, allowing the end wall to act on the first friction pad 71. Furthermore, the second friction pad 72 is acted upon via the housing 101, thereby clamping the brake disc 95 to achieve braking. For the specific structure and operation of the electromechanical brake including the main brake module 2 and the brake caliper module 1, please refer to Chinese invention patent application CN117267280A entitled "Electromechanical Brake", the entire contents of which are incorporated herein by reference.

[0057] Continue to refer to Figures 16 to 25Further embodiments are described below. In some embodiments, to prevent dust or the like from entering the operating hole 11 and causing the retaining ring 3 to become stuck or rusted and difficult to disassemble, the electromechanical brake further includes a plug 13 that seals the operating hole 11. The plug 13 includes a cover portion 131 and a plug body 132. When the plug 13 is installed into the operating hole 11, the plug body 132 is inserted into the operating hole 11 and the cover portion 131 is located outside the operating hole 11. In some embodiments, such as Figure 22 As shown, the cover 131 is sheet-shaped and has an embedded metal frame 134, thereby strengthening the cover 131. The metal frame 134 may have a shape corresponding to the sheet-shaped cover. The cover 131 facilitates the installation / removal of the plug 13 and the operating hole 11. Providing the metal frame 134 in the cover 131 prevents damage to the cover when removing the plug.

[0058] In some embodiments, such as Figure 16 and Figure 17 As shown, the sidewalls of the operating hole 11 include one or more slots 113, 114. For example, in the embodiment shown, a pair of axially opposite sidewalls of the operating hole 11 are provided with slots 113, 114. Figures 18 to 20 As shown, the plug body 132 has one or more engaging portions 1321, 1322 that engage with one or more slots 113, 114 when inserted into the operating hole 11. Through the engagement of the slots and engaging portions, the plug 13 can be stably fixed in the operating hole 11. To enable the plug 13 to be smoothly inserted into the operating hole, the plug body 132 may have a design that allows for easy compression. This compressibility can be achieved through the selection of the plug's material, such as easily deformable rubber, or through structural features, such as when the plug is made of other slightly harder plastic materials. In some embodiments, such as... Figure 19 As shown, the plug body 132 may be integral and the plug body 132 has one or more holes 1323 to allow the plug body 132 to be compressed. The integral plug body 132 may provide a continuous outer peripheral surface 1320, which provides a continuous sealing surface.

[0059] like Figure 23 As shown, in some embodiments, the plug body 132 may also be composed of a plurality of separate guide portions 1324, 1325, 1326, 1327, which provide compressibility of the plug body 132. In some embodiments, the engaging portions 1321, 1322 are provided on the outer surfaces of a pair of the plurality of separate guide portions. Figure 24 and 25 As shown, plug 13 can be installed or removed by a suction head with a vacuum chamber V, or when plug 13 has a metal frame, plug 13 can be installed or removed by a suction head with a magnet M.

[0060] The electromechanical brake according to the embodiments of this application enables easy assembly and / or disassembly between the main brake module 2 and the brake caliper module 1, thereby facilitating maintenance and component replacement of the electromechanical brake.

[0061] The specific embodiments described above are merely for the purpose of more clearly illustrating the principles of this application, wherein various components are clearly shown or described to make the principles of the invention easier to understand. Various modifications or variations can be easily made to this application by those skilled in the art without departing from the scope of this application. Therefore, it should be understood that all such modifications or variations should be included within the patent protection scope of this application.

Claims

1. An electromechanical brake, comprising: The main braking module (2) includes a protrusion (20) having a first groove (201); A brake caliper module (1), the brake caliper module (1) including a recess (10) that mates with a protrusion (20) of the main brake module (2), the recess (10) having a second groove (15); and A retaining ring (3) is annular and has a notch (31). The retaining ring (3) has a first end (32) and a second end (33) located on both sides of the notch (31). The retaining ring (3) can be compressed by bringing the first end (32) and the second end (33) closer to each other. The first end (32) and the second end (33) each have a joint for engaging with an external tool so that the first end (32) and the second end (33) can be brought closer to each other by an external tool. When the main braking module (2) and the brake caliper module (1) are assembled, the protrusion (20) of the main braking module (2) is inserted axially into the notch (10) of the brake caliper module (1), and the retaining ring (3) is compressed at the first groove (201) of the main braking module (2) so that the retaining ring (3) can be inserted with the protrusion (20), and the retaining ring (3) unfolds when the first groove (201) and the second groove (15) are aligned, so as to restrict the relative position of the main braking module (2) and the brake caliper module (1) in the axial direction.

2. The electromechanical brake according to claim 1, characterized in that, The first end (32) of the retaining ring (3) is formed as an outwardly open first slot (321), hook or hole, and the second end (33) of the retaining ring (3) is formed as an outwardly open second slot (331), hook or hole.

3. The electromechanical brake according to claim 2, characterized in that, The brake caliper module (1) also includes an operation hole (11) extending from the outer peripheral surface of the brake caliper module (1) to the second groove (15). In the assembled state, the operation hole (11) corresponds to the position of the first end (32) and the second end (33) of the retaining ring (3), so that the first end (32) and the second end (33) of the retaining ring (3) can be reached through the operation hole (11).

4. The electromechanical brake according to claim 3, characterized in that, The operating hole (11) includes a first section (111) aligned axially with the second groove (15) and a second section (112) located on the side of the end face (19) of the first section. The first section (111) has a width greater than that of the second section (112), wherein the second section (112) has a width that gradually decreases toward the end face (19).

5. The electromechanical brake according to claim 3, characterized in that, The electromechanical brake also includes a plug (13) for sealing the operating hole. The plug (13) includes a cover (131) and a plug body (132). When the plug (13) is installed into the operating hole (11), the plug body (132) is inserted into the operating hole (11) and the cover (131) is located outside the operating hole (11).

6. The electromechanical brake according to claim 5, characterized in that, The cover (131) is sheet-shaped and has an embedded metal frame (134).

7. The electromechanical brake according to claim 5, characterized in that, The sidewall of the operating hole (11) includes one or more slots (113, 114), and the plug body (132) has one or more snap-fit ​​portions (1321, 1322) that engage with the one or more slots (113, 114) when inserted into the operating hole (11); The plug body (132) is integral and has one or more blind holes (1323), or the plug body (132) is composed of multiple separate guides, and the outer side of a pair of the multiple separate guides is provided with the snap-fit ​​portion (1321, 1322).

8. The electromechanical brake according to claim 1, characterized in that, The brake caliper module (1) also includes an observation hole (12) extending from the outer peripheral surface of the brake caliper module (1) to the second groove (15).

9. The electromechanical brake according to any one of claims 1-8, characterized in that, The electromechanical brake further includes an elastic member (4) disposed between the outer end face (19) of the notch (10) of the brake caliper module (1) and the shoulder (29) of the protrusion (20) of the main brake module (2), wherein the elastic member (4) is a disc spring and is axially pressed when the main brake module (2) is assembled with the brake caliper module (1), wherein the outer end face (19) of the brake caliper module (1) supports the entire annular elastic member (4).

10. The electromechanical brake according to claim 9, characterized in that, The protrusion (20) includes a cylindrical outer wall (23) and a retractable end wall (21), the first groove (201) and the shoulder (29) are arranged along the outer periphery of the cylindrical outer wall (23), wherein the cylindrical outer wall (23) houses a ball screw mechanism, and the retractable end wall (21) is connected to the ball screw mechanism.

11. The electromechanical brake according to claim 10, characterized in that, The brake caliper module (1) includes a housing (101) and a friction plate support (102). The housing (101) defines the recess (10) and is axially slidably supported on the friction plate support (102). A first friction plate (71) and a second friction plate (72) are disposed on the friction plate support (102). The recess (10) communicates with the first friction plate (71) so that the end wall (21) can act on the first friction plate (71).

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