Seals, brake calipers and electromechanical brakes

Abstract

This application provides a seal, a brake caliper, and an electromechanical brake. The brake caliper includes: a housing; a ball screw mechanism housed within the housing; and a first seal disposed circumferentially in a first groove on the inner wall of the housing. The first seal has a C-shaped cross-section and includes an outer flange, an inner flange, and a body connecting the outer flange and the inner flange. The outer flange of the first seal engages in the first groove of the housing, and the inner flange of the first seal abuts against the outer surface of the nut of the ball screw mechanism. The seal, brake caliper, and electromechanical brake according to embodiments provide improved sealing performance.

Description

Technical Field

[0001] This application relates to the field of braking devices, and more specifically, to an electromechanical brake and a brake caliper and seal therein. 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 are exposed to external road surfaces during use, where they may be exposed to sewage and dust. Preventing sewage and dust from entering the electromechanical brake is a challenge. Summary of the Invention

[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, a brake caliper is provided, comprising: Enclosure; The ball screw mechanism housed within the casing; and A first sealing element is disposed in a first groove on the inner wall of the housing along the circumferential direction. The first sealing element has a C-shaped cross-section and includes an outer flange, an inner flange, and a main body connecting the outer flange and the inner flange. The outer flange of the first sealing element is inserted into the first groove of the housing, and the inner flange of the first sealing element is in contact with the outer surface of the nut of the ball screw mechanism.

[0006] According to another aspect, an electromechanical brake is also provided, the electromechanical brake comprising: a brake caliper according to various embodiments; and A brake drive device that is connected to the ball screw mechanism of the brake caliper.

[0007] According to another aspect, a sealing element is also provided, the sealing element being annular and having a C-shaped cross-section, the sealing element comprising: an outer flange, an inner flange, and a body connecting the outer flange and the inner flange; the sealing element comprising a skeleton and a cover formed on the skeleton, the skeleton being made of a rigid material, and the cover being made of an elastic material; The skeleton includes a first segment corresponding to the outward flange, a second segment corresponding to the inward flange, and a third segment connecting the first segment and the second segment. The first segment of the skeleton is constructed as a plurality of separate tabs to allow elastic deformation of the outward flange of the first seal.

[0008] The seals, brake calipers, and electromechanical brakes according to the embodiments provide improved sealing performance. Attached Figure Description

[0009] 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: Figure 1 An exploded view of the electromechanical brake according to an embodiment being assembled to a wheel hub is shown; Figure 2 A perspective view of an electromechanical brake according to an embodiment is shown; Figure 3 An exploded view of an electromechanical brake according to an embodiment is shown; Figure 4 A longitudinal cross-sectional view of an electromechanical brake according to an embodiment is shown; Figure 5 A partial enlarged view of the electromechanical brake according to an embodiment is shown; Figure 6 It shows the basis with Figure 5 A magnified view of the corresponding part of the casing; Figure 7 A perspective view of the skeleton of the first seal of the electromechanical brake according to an embodiment is shown; Figure 8 A perspective view of the first seal of an electromechanical brake according to an embodiment is shown; Figure 9 A perspective view of the compensation plate of an electromechanical brake according to an embodiment is shown; Figure 10 A perspective view of a compensation plate with a sealing portion of an electromechanical brake according to an embodiment is shown; Figure 11 It shows Figure 10 Cross-sectional view of the compensation plate; Figure 12 A perspective view of a force transmission plate according to an embodiment is shown; Figure 13 A cross-sectional view is shown when the compensation plate and the force transmission plate are joined according to one embodiment; Figure 14 A perspective view of a force transmission plate with a sealing sleeve according to an embodiment is shown; Figure 15 It shows Figure 14 A cross-sectional view of the force transmission plate in the diagram; Figure 16 A cross-sectional view is shown when the compensation plate and the force transmission plate are joined according to another embodiment; Figure 17 It shows that according to Figure 16 A partial enlarged view of the endplate assembly being assembled into the electromechanical actuator; Figure 18 A perspective view of the housing according to an embodiment is shown; Figure 19 A cross-sectional view of the housing according to an embodiment is shown; Figure 20 A cross-sectional view of the housing according to an embodiment is shown; Figure 21 A perspective view of the bearing and retaining ring according to an embodiment is shown; and Figure 22 , Figure 23 and Figure 24 Cross-sectional views of various states during the assembly process of the brake caliper according to the embodiment are shown. Detailed Implementation

[0010] 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.

[0011] refer to Figures 2 to 24 To describe electromechanical brakes according to various embodiments. For example... Figure 2 , Figure 3 and Figure 4 As shown, the electromechanical brake includes a brake caliper 1 and a brake drive device 2. The brake drive device 2 may include a motor (only the motor's output shaft 31 is visible in the figure), an electronic control unit 4, and a housing. The housing includes an outer wall 21 defining a recess 20. The electronic control unit 4 may be mounted at one end of the housing and can be connected to the vehicle via a wiring harness to receive brake control signals and to the motor to control the motor to output appropriate braking torque. The brake caliper 1 may include a housing 11, a friction pad holder housing a pair of friction pads, and a ball screw mechanism, etc. The housing 11 includes a housing wall 12 defining a cavity 120, in which a ball screw mechanism is disposed. The ball screw mechanism includes a main shaft 4 supported by a bearing 5 on the inner side of the housing wall 12. Figure 4As shown in the longitudinal cross-sectional view, when the brake caliper 1 is assembled with the brake drive unit 2, the housing wall 12 of the brake caliper 1 is inserted into the recess 20 of the brake drive unit 2, such that the outer wall 21 surrounds the housing wall 12, and the motor, such as its output shaft 31, is drive-connected to the main shaft 4. Through this arrangement, the rotation of the motor is transmitted to the ball screw mechanism, which in turn is converted into the translation of the end plate assembly 44, thereby driving the first friction plate 71 and the second friction plate 72 to clamp the brake disc 95, thereby providing braking force.

[0012] Since the endplate assembly is exposed to the environment, considering the complex road conditions during vehicle operation, contaminants such as dust and sewage may enter the electromechanical brake from the endplate assembly location, causing it to malfunction. Furthermore, the endplate assembly 44 needs to accommodate the deformation of the housing 11 (the housing deforms during braking, causing the housing 11 to...) Figure 4 The end plate assembly (offset to the right by 0-5 degrees from its vertical position) has a relatively complex structure, and it is also necessary to prevent contaminants from entering the interior of the end plate assembly. Given that both nut 42 and end plate assembly 44 are moving parts, providing an effective seal is a challenge.

[0013] To address this problem, a brake caliper 1 and an electromechanical brake including the brake caliper 1 are provided. The brake caliper 1 includes: a housing 11; a ball screw mechanism housed within the housing 11; and a first seal 82 disposed circumferentially in a first groove 69 on the inner wall of the housing 11. (Reference) Figures 5 to 8 The first seal 82 has a C-shaped cross-section and includes an outer flange 824, an inner flange 822, and a body 823 connecting the outer flange 824 and the inner flange 822. The outer flange 824 of the first seal is engaged in the first groove 691 of the housing, and the inner flange 822 of the first seal is in contact with the outer surface of the nut 42 of the ball screw mechanism. The C-shaped first seal 82 provides a seal between the nut 42 and the inner side of the housing, effectively preventing contaminants from entering the electromechanical brake from the gap between the nut 42 and the housing, regardless of how the nut 42 moves.

[0014] like Figure 5 , Figure 7 and Figure 8As shown, the first seal includes a skeleton 820 and a cover 821 formed on the skeleton 820. The skeleton 820 may be made of a rigid material, such as steel, and the cover 821 may be made of an elastic material, such as rubber or silicone. The skeleton 820 may have a shape corresponding to the first seal, including a first segment 8202 corresponding to an outward flange, a second segment 8201 corresponding to an inward flange, and a third segment 8203 connecting the first segment 8202 and the second segment 8201. The cover 821 may be molded outside the skeleton 820 and partially or completely enclose the skeleton 820. The skeleton 820 can maintain the basic shape stability of the first seal 82 and has a certain elastic deformation capability, while the cover 821 ensures that the first seal 82 is in close contact with each surface to be sealed to provide a seal. In some embodiments, the skeleton 820 is made of stamped metal material, and the cover 821 is rubber formed on the skeleton 820 by molding.

[0015] refer to Figure 5 and Figure 6 When installed in place, the outer side of the outer flange 824 of the first seal abuts against the bottom wall 691 of the first groove 69, and the outer side of the inner flange 822 of the first seal abuts against the cylindrical end 421 of the nut 42, which causes the first seal to be compressed radially. Furthermore, the end of the outer flange 824 of the first seal abuts against the front wall 690 of the first groove 69, and the outer side of the body 823 of the first seal abuts against the rear wall of the first groove 69, which causes the first seal to be compressed axially. In some embodiments, the rear wall of the first groove 69 is formed by a first shoulder 651 of the inner wall of the housing. To allow the first seal 82 to be installed more stably in the first groove 69, the skeleton 820 of the first seal is formed with a plurality of separate tabs at the position corresponding to the outer flange 824, i.e., the first section 8202 of the skeleton 820, to allow the outer flange 824 of the first seal to deform and pass through the contraction section 692 in front of the first groove 691. In some embodiments, in order to ensure that the first seal 82 can be engaged in the first groove 691, the outer ring of the first shoulder 651 has a relief groove 653, so that the outer flange 824 of the first seal 82 can move more relative to the inner flange 822, thereby ensuring that the end of the outer flange 824 can enter the first groove 691.

[0016] In some embodiments, the nut 42 includes a cylindrical end 421 and is connected via this cylindrical end 421 to an end plate assembly 44, the end plate assembly 44 including: a compensating plate 442 connected to the cylindrical end 421 of the nut and a force transmission plate 441 engaged with the compensating plate 442. Figure 9As shown, in some embodiments, the compensation plate 442 includes a hub 4421, which is connected to the inner side of the cylindrical end 421 of the nut, and a second seal 83 is provided between the hub 4421 and the cylindrical end 421. In some embodiments, the second seal 83 is a sealing ring disposed in a sealing ring groove 4422 on the outer side of the hub 4421 of the compensation plate. In some embodiments, the hub 4421 of the compensation plate is interference-fitted to the cylindrical end 421 of the nut. The second seal 83 can prevent contaminants from entering the ball screw mechanism from between the end plate assembly 44 and the nut 42, thereby affecting the normal operation of the ball screw mechanism. Of course, considering that the hub 4421 of the compensation plate and the cylindrical end 421 of the nut are interference-fitted, the second seal 83 can be omitted while ensuring tightness of the fit.

[0017] In some embodiments, a third seal is provided between the compensation plate 442 and the force transmission plate 441. The third seal is a sealing portion 841 disposed at the edge of the compensation plate or a sealing sleeve 842 disposed at the edge of the force transmission plate. (See reference) Figures 9 to 13 In some embodiments, the third seal is constructed as a sealing portion 841 at the edge of the compensation plate. More specifically, Figure 9 A rear side view of a compensation plate 442 without a seal is shown, which includes a hub 4421 and a sealing ring groove 4422. Figure 10 For the compensation plate 442 with added sealing part 841, the sealing part 841 can be made of conventional sealing material, such as silicone, rubber, etc., which is formed, for example, by molding on the edge of the compensation plate. Figure 11 A cross-sectional view of the compensation plate 442 is shown. As can be seen, the edges of the compensation plate are constructed with grooves 4434 on both the front and rear sides, thereby positioning the sealing part 841 and preventing it from easily falling off. Furthermore, the front side of the compensation plate that engages with the force transmission plate 441 includes a central recess 4430, which is constructed as a blind hole, i.e., its bottom wall is closed to prevent contaminants from entering the inside of the nut. The outer side of the central recess 4430 is provided with a convex spherical portion 4431, and the outer side of the spherical portion 4431 is provided with a raised portion 4432, wherein the raised portion 4432 is raised forward. Figure 12 and Figure 13 As shown, the force transmission plate 441 has a central protrusion 4411 on the side that engages with the compensation plate, corresponding to the position of the central notch 4430. Outside the central protrusion 4411, there is a spherical groove 4412 that mates with the spherical portion 4431 of the compensation plate, and an inclined portion 4413 outside the spherical groove 4412. The contour of the inclined portion 4413 is configured such that when the compensation plate and the force transmission plate are engaged, the sealing portion 841 engages tightly with it. Although in Figure 13 (Not shown in the diagram) A tolerance bushing 443 is provided between the central protrusion 4411 of the force transmission plate and the central recess 4430 of the compensation plate (see...). Figure 4This allows the compensating plate 442 to rotate relative to the force transmission plate 441 while the spherical portion 4431 is engaged with the spherical groove 4412, thereby accommodating the deformation of the cover 11.

[0018] refer to Figures 14 to 17 In another embodiment, the third seal 842 is a sealing sleeve 842 molded onto the edge of the force transmission plate and extending radially inward. The sealing sleeve 842 can also be formed on the force transmission plate 842 by molding. Figure 15 As shown, the force transmission plate may have a groove 4415 on its edge 4414 to prevent the sealing sleeve 842 from falling off. Figure 16 As shown, when the compensation plate and the force transmission plate are engaged, the sealing sleeve 842 is fitted onto the raised portion. Figure 17 As shown, the sealing form of such an endplate assembly 44 can be used in the same way for Figure 4 Electromechanical brakes in the middle.

[0019] Continue to refer to Figure 3 and Figure 4 In some embodiments, the brake caliper 1 includes: a friction pad bracket 112, which is fixedly mounted on the vehicle through a mounting hole 1121; a first friction pad 71 and a second friction pad 72 are disposed on the friction pad bracket 112; and a cover 11, the ball screw mechanism therein, and the brake drive device 2 connected thereto are slidably mounted on the friction pad bracket 112.

[0020] Continue to refer to Figures 18 to 20 The specific structure of the cover 11 is described below. In some embodiments, the cover 11 includes a cover body 110, which has opposing inner and outer ends. The outer end of the cover body 110 has a hook 111 that acts on the second friction plate 72. The inner end of the cover body 110 is connected to a cylindrical cover wall 12, which defines a cavity 120 for housing a ball screw mechanism. The cavity 120 leads to the first friction plate 71, allowing the ball screw mechanism to act on the first friction plate 71. The cover body 110 covers the first friction plate 71 and the second friction plate 72. A pair of flanges 113 are provided on both sides of the cover body 110. Each of the flanges 113 includes a mounting hole 114 for connecting to a first guide pin and a second guide pin that are parallel to each other. The cover 11 is slidably mounted to the friction plate support 112 via the first guide pin and the second guide pin. More specifically, the first guide pin and the second guide pin are respectively inserted into the guide holes 122 of the friction plate support 112.

[0021] In some embodiments, the ball screw mechanism includes a main shaft 4, which includes a first end 45 and a second end 41 opposite to each other. The first end 45 of the main shaft 4 is fixedly connected to an input gear 43, and the second end 41 of the main shaft is formed as the screw of the ball screw mechanism. The main shaft 4 is supported in a housing by a bearing 5 between the first end 45 and the second end 41. The input gear 43 is constructed as a worm gear, and the output shaft 31 of the motor is constructed as a worm and meshes with the worm gear. The inner surface of the housing includes a second circumferential groove 64, such as... Figure 21 The bearing 5 shown is fitted into the second groove 64 via a retaining ring 51. Figure 20 As shown, in some embodiments, the inner surface of the housing further includes a boss 650, which includes a first shoulder 651 facing the first groove 69 and a second shoulder 65 facing the second groove 64. An elastic member 52 is disposed between the second shoulder 65 and the bearing 5. The boss 650 also includes a circumferentially oriented third groove 68 in which a sliding bearing 54 is arranged to guide the axial sliding of the nut 42. In some embodiments, the boss 650 further includes at least one axially oriented anti-rotation groove 67, and the outer surface of the nut 42 includes a protrusion that engages with the anti-rotation groove 67, thereby restricting rotation of the nut and allowing it to translate axially.

[0022] The outer wall 21 of the brake drive device 2 and the housing wall 12 of the housing 11 can both be cylindrical, and when the outer wall 21 surrounds the housing wall 12, the two are tightly joined, with only an assembly gap. The outer wall 21 and the housing wall 12 can be connected by any suitable means, such as welding, bonding, etc. In some embodiments, such as Figures 18 to 20 As shown, the outer surface of the housing wall 12 has a fourth groove 62 along the circumference. The outer wall 21 is deformed to fill the fourth groove 62, thereby connecting the brake caliper 1 to the brake drive device 2. This process is also called caulking or crimping. In some embodiments, the outer surface of the outer wall 21 includes at least one rib 23. When at least one rib 23 on the outer surface of the outer wall 21 is aligned with the fourth groove 62, a force is applied to the at least one rib 23, causing the at least one rib 23 to deform towards the fourth groove 62 to fill the fourth groove 62, thereby achieving the connection. To achieve this connection, the outer wall 21 can be made of aluminum-based material or other metal or non-metal materials with good deformability. The deformation can be achieved by pressing with a pressure head. The pressing process, for example, causes the pressure head to press the rib 23 into the fourth groove 62 at one point, and then the assembly is rotated to press the entire rib 23 into the fourth groove 62.

[0023] In some embodiments, the outer surface of the housing wall has a fifth groove 61 circumferentially parallel to the fourth groove 62, and a fourth seal 81, such as a sealing ring, is arranged in the fifth groove 61 to seal the gap between the housing wall 12 and the outer wall 21. In the illustrated embodiment, the fourth groove 62 is closer to the end or further out than the fifth groove 61. In some embodiments, the outer surface of the housing wall 12 also includes circumferential anti-rotation teeth 63, which are interference-fitted into the recesses 20 of the outer wall 21. The anti-rotation teeth 63 achieve circumferential restraint between the two by interference fit with the outer wall 21, and axial restraint between the two by the aforementioned caulking and riveting. In the illustrated embodiment, the anti-rotation teeth 63 are further out or closer to the end than the fourth groove 62. The anti-rotation teeth 63 can be formed by a cylindrical scraper acting on the outside of the housing wall 12, and in some embodiments, the anti-rotation teeth can be formed by two processes: coarse scraping and fine scraping. Although the anti-rotation tooth 63 is formed along the entire circumference in the illustrated embodiment, in alternative embodiments, the anti-rotation tooth 63 may occupy only one or more arcuate segments. The fourth groove 62, the fifth groove 61 and the anti-rotation tooth 63 on the outer side of the cover wall 12 can achieve limiting and sealing between the cover wall 12 and the outer wall 21.

[0024] Continue to refer to Figures 22 to 24 Let's introduce the assembly process of brake caliper 1. For example... Figure 22 As shown, before assembly, the sliding bearing 54 and the elastic member 52 are first assembled to the housing wall 12. The spindle 4 is connected to the bearing 5, such that the spindle 4 is interference-fitted to the inner ring 502 of the bearing at an intermediate position between the first end and the second end, and then the input gear 43 is installed to the spindle 4. In some embodiments, the input gear 43 may include an inner ring 431 made of a first material and an outer ring 432 made of a second material, such as metal to improve its connection strength with the spindle, and the outer ring may be made of plastic, etc. Then, the assembly of the spindle 4 and the bearing 5 is inserted together into the housing wall 12 and fixed in place by the retaining ring 51. Specifically, the bearing 5 is fitted into the second groove 64 by the retaining ring 51, such as... Figure 21 As shown, the outer ring of bearing 5 has a retaining ring groove. A retaining ring 51 can be compressed into the retaining ring groove and inserted into the inner side of the housing wall 12 along with the bearing. The retaining ring 51 unfolds at the second groove 64, thereby achieving axial positioning of bearing 5. Figure 23As clearly shown, the inner diameter of the second groove 64 is configured such that the retaining ring 51, when the second groove 64 is deployed, still radially overlaps with the second groove 64 and the retaining ring groove. In some embodiments, the inner surface of the housing wall 12 further includes a boss 650, the boss 650 including a first shoulder 65 facing the second groove 64, and an elastic member 52 disposed between the first shoulder 65 and the bearing 5. The arrangement of the elastic member 52 will provide an outward thrust to the outer ring 501 of the bearing 5, while the retaining ring 51 will prevent the outer ring 501 of the bearing 5 from moving outward, thereby achieving axial positioning of the bearing 5. The bearing 5 may be a thrust bearing. In some embodiments, a fourth groove 66 is provided at the first shoulder 65 in the circumferential direction, and the elastic member 52 can be embedded in the fourth groove 66. Continuing to refer to Figure 23 After the lead screw nut is installed in place, the first seal 82 is installed into the first groove. Pressure, as indicated by arrow F, can be applied to the first seal 82 via a ring-shaped pressure head. The clearance space 653 provided in the first groove ensures that the first seal 82 can be embedded in the groove, thereby improving the production yield. Subsequently, as... Figure 24 As shown, the end plate assembly 44 is interference-fitted to the cylindrical end 421 of the nut via the hub 441 of the compensation plate, wherein the main shaft 4 includes a notch 420, thereby avoiding the protrusion of the compensation plate. For the specific structure and operation of the electromechanical brake, please refer to Chinese invention patent application CN117267280A entitled "Electromechanical Brake," the entire contents of which are incorporated herein by reference.

[0025] According to another aspect, this application also provides an electromechanical brake, which includes a brake caliper 1 according to various embodiments and a brake drive device 2 drivenly connected thereto. According to another aspect, this application also provides a seal. The seal, brake caliper, and electromechanical brake according to embodiments of this application provide improved sealing performance.

[0026] 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. A brake caliper, comprising: Cover (11); A ball screw mechanism housed in the housing (11); as well as A first sealing element (82) is disposed in a first groove (69) on the inner wall of the housing (11) along the circumferential direction. The first sealing element (82) has a C-shaped cross-section and includes an outer flange (824), an inner flange (822), and a body (823) connecting the outer flange (824) and the inner flange (822). The outer flange (824) of the first sealing element (82) is inserted into the first groove (69) of the housing (11), and the inner flange (822) of the first sealing element is in contact with the outer surface of the nut (42) of the ball screw mechanism.

2. The brake caliper according to claim 1, characterized in that, The first seal includes a skeleton (820) and a cover (821) formed on the skeleton; The skeleton (820) is made of rigid material, the cover (821) is made of elastic material, and the cover (821) partially or completely covers the skeleton (820). The skeleton (820) is made of metal material by stamping, and the coating (821) is rubber or silicone formed on the skeleton (820) by molding.

3. The brake caliper according to claim 1, characterized in that, The first seal includes a skeleton (820) and a cover (821) formed on the skeleton. The skeleton (820) includes a first segment (8202) corresponding to the outer flange, a second segment (8201) corresponding to the inner flange, and a third segment (8203) connecting the first segment (8202) and the second segment (8201). The first segment (8202) of the skeleton is configured as a plurality of separate tabs (8202) to allow the outer flange (824) of the first seal to elastically deform.

4. The brake caliper according to claim 3, characterized in that, The inner wall of the cover includes a first shoulder (651) on the inner side of the first groove (69), and the body (823) of the first seal abuts against the first shoulder (651), wherein the outer ring of the first shoulder (651) is provided with a relief groove (653).

5. The brake caliper according to claim 1, characterized in that, The nut (42) of the ball screw mechanism includes a cylindrical end (421) and is connected to an end plate assembly (44), the end plate assembly (44) including: a compensating plate (442) connected to the cylindrical end (421) of the nut and a force transmission plate (441) engaged with the compensating plate (442).

6. The brake caliper according to claim 5, characterized in that, The compensation plate (442) includes a hub (4421), the hub (4421) of the compensation plate is connected to the inner side of the cylindrical end (421) of the nut, and a second seal (83) is provided between the hub (4421) and the cylindrical end (421), wherein the second seal (83) is a sealing ring, and the hub (4421) is interference-fitted to the cylindrical end (421).

7. The brake caliper according to claim 5, characterized in that, A third sealing element is provided between the compensation plate (442) and the force transmission plate (441). The third sealing element is a sealing part (841) provided on the edge of the compensation plate or a sealing sleeve (842) on the edge of the force transmission plate.

8. The brake caliper according to claim 7, characterized in that, The side of the compensation plate that engages with the force transmission plate has a central notch (4430), a spherical portion (4431) on the outer side of the central notch (4430), and a raised portion (4432) on the outer side of the spherical portion (4431), wherein the central notch (4430) is constructed as a blind hole; the side of the force transmission plate that engages with the compensation plate has a central protrusion (4411) corresponding to the position of the central notch, a spherical groove (4412) on the outer side of the central protrusion that mates with the spherical portion of the compensation plate, and a sloped portion (4413) on the outer side of the spherical groove; A tolerance bushing (443) is provided between the central protrusion (4411) and the central recess (4430) to allow the force transmission plate (441) to rotate relative to the compensation plate (442) when the spherical portion (4431) is engaged with the spherical groove (4412). The third seal is a sealing portion (841) molded onto the edge of the compensation plate and partially engaged with the inclined portion (4413) of the force transmission plate; or The third seal is a sealing sleeve (842) molded on the edge of the force transmission plate and extending radially inward to cover the edge of the compensation plate.

9. The brake caliper according to any one of claims 1-8, characterized in that, The electromechanical brake includes: Friction plate bracket (112), on which a first friction plate (71) and a second friction plate (72) are disposed; The cover (11) is slidably mounted on the friction plate support (112). The cover (11) includes a cover body (110), which has opposing inner and outer ends. The outer end of the cover body (110) has a hook (111) that acts on the second friction plate (72). The inner end of the cover body (110) is connected to a cylindrical cover wall (12). The cover wall (12) defines a cavity (120) for accommodating a ball screw mechanism. The cavity (120) leads to the first friction plate (71). The cover body (110) covers the first friction plate (71) and the second friction plate (72). A pair of flanges (113) are provided on both sides of the cover body (110) for connecting to a first guide pin and a second guide pin that are parallel to each other, respectively. The cover (11) is slidably mounted to the friction plate support (112) via the first guide pin and the second guide pin.

10. The brake caliper according to any one of claims 1-8, characterized in that, The ball screw mechanism includes a main shaft (4), which includes a first end (45) and a second end (41) opposite to each other. The first end (45) of the main shaft (4) is fixedly connected to an input gear (43), and the second end (41) of the main shaft is formed as the screw of the ball screw mechanism. The main shaft (4) is supported in the housing by a bearing (5) between the first end (45) and the second end (41). The input gear (43) is constructed as a worm gear to mesh with the output shaft (31) of a motor, which is constructed as a worm. The inner surface of the cover includes a second groove (64) along the circumferential direction, and the bearing (5) is fitted to the second groove (64) by a retaining ring (51); The inner surface of the cover also includes a boss (650), the boss (650) includes a first shoulder (651) facing the first groove (69) and a second shoulder (65) facing the second groove (64), and an elastic member (52) is disposed between the second shoulder (65) and the bearing (5); The boss (650) further includes a third groove (68) along the circumferential direction, in which a sliding bearing (54) is arranged to guide the axial sliding of the nut (42); The boss (650) further includes at least one anti-rotation groove (67) along the axial direction, and the outer surface of the nut (42) includes a protrusion that fits into the anti-rotation groove (67).

11. An electromechanical brake, characterized in that, The electromechanical brake includes: Brake calipers as claimed in any one of claims 1-10; and Braking drive device (2) that is connected to the ball screw mechanism of the brake caliper.

12. A sealing element, characterized in that, The sealing element is annular and has a C-shaped cross-section. The sealing element includes: an outer flange (824), an inner flange (822), and a body (823) connecting the outer flange (824) and the inner flange (822). The seal includes a skeleton (820) and a cover (821) formed on the skeleton, the skeleton (820) being made of a rigid material and the cover (821) being made of an elastic material; The skeleton (820) includes a first segment (8202) corresponding to the outer flange, a second segment (8201) corresponding to the inner flange, and a third segment (8203) connecting the first segment (8202) and the second segment (8201). The first segment (8202) of the skeleton is constructed as a plurality of separate tabs (8202) to allow the outer flange (824) of the first seal to elastically deform.

13. The seal according to claim 12, characterized in that, The skeleton (820) is made of metal material by stamping, and the cover (821) is rubber or silicone formed on the skeleton (820) by molding, wherein the cover (821) partially or completely covers the skeleton (820).

Images