Electronic mechanical brake caliper

Abstract

The utility model relates to an electronic mechanical brake caliper which comprises a caliper body, a piston, a sealing cover and an elastic film, a sealing space is arranged in the caliper body, and the piston is arranged in the sealing space in a sliding mode. The sealing cover is provided with an outer ring and an inner ring which are opposite to each other, the outer ring is fixedly connected with the caliper body, the inner ring is fixedly connected with the piston, and a telescopic sealing part is arranged between the outer ring and the inner ring; a through hole communicating the sealed space with the external environment is formed in the wall of the sealed space, and the elastic film is arranged at the through hole and used for balancing the pressure difference between the sealed space and the external environment. According to the electronic mechanical brake caliper, the air pressure in the sealed space can be adjusted through the elastic film to balance the pressure difference between the interior of the sealed space and the external environment, so that reverse resistance is prevented from being generated in the braking process, energy consumption is further prevented from being increased, and energy conservation and consumption reduction are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile braking, in particular to an electronic mechanical brake caliper. Background Art

[0002] Traditional hydraulic brake systems rely on brake fluid to transmit force, with the piston pushing the brake pads into contact with the brake disc to achieve braking. Over time, wear on the brake pads and discs causes the pads to become thinner, forcing the piston to extend a greater distance to bring the pads into contact, which in turn increases the volume of the piston cavity. To maintain braking performance, more brake fluid flows into the piston cavity to fill the gaps created by wear, ensuring that the piston cavity remains full of brake fluid.

[0003] In EMB (Electric Mechanical Brake) calipers, brake fluid is no longer used as a force transmission medium. Instead, an electric motor is used as the power source to directly transmit force to the piston via a reduction mechanism and transmission components, thereby reducing the complexity of the braking system and improving the response speed.

[0004] The EMB caliper contains a confined space, but due to structural and sealing requirements, this space is isolated from the outside world. As the brake pads wear, the piston needs to extend farther out of the confined space, increasing its volume. This increase in volume reduces the air pressure inside the space, creating a pressure differential between the two sides of the piston (the confined space and the external environment). During braking, this pressure differential pushes the piston in the opposite direction of its extension, generating a force known as reverse resistance. Currently, EMB calipers typically overcome this reverse resistance by increasing the driving force of the motor to ensure effective braking. However, this approach increases energy consumption during braking. Utility Model Content

[0005] The utility model aims to solve the problem of increasing energy consumption during braking due to the pressure difference between the interior of the enclosed space in the electronic mechanical brake caliper and the external environment and overcoming the reverse resistance generated by the pressure difference.

[0006] In order to solve the above problems, the utility model proposes an electronic mechanical brake caliper, comprising a caliper body, a sealing cover, a piston and an elastic membrane, wherein a sealed space is provided in the caliper body, and the piston is slidably arranged in the sealed space; the sealing cover has a relative outer ring and an inner ring, the outer ring is fixedly connected to the caliper body, and the inner ring is fixedly connected to the piston, and a retractable sealing portion is provided between the outer ring and the inner ring; the wall of the sealed space is provided with a through hole connecting the sealed space and the external environment, and the elastic membrane is provided at the through hole for balancing the pressure difference between the sealed space and the external environment.

[0007] Furthermore, the electronic mechanical brake caliper of the present invention further includes an end cover, which is mounted on an end of the caliper body away from the piston, and the through hole is provided on the end cover.

[0008] Optionally, the elastic membrane includes a film body and an external frame fixedly connected to an edge of the film body, and the film body is mounted on the end cover through the external frame.

[0009] Optionally, the sealed space includes a piston chamber for accommodating the piston and an accommodating chamber for accommodating the driving element, and the piston chamber and the accommodating chamber are separated by a partition and communicated through an air vent provided on the partition.

[0010] Optionally, a transmission rod and a moving ring are provided between the output end of the driving element and the piston, the transmission rod is connected to the output end of the driving element, the moving ring is fixedly connected to the piston, and the moving ring and the transmission rod are respectively provided with internal threads and external threads that match each other.

[0011] Furthermore, the electronic mechanical brake caliper of the present invention further comprises a protective cover, which is located outside the end cover. The end surface of the protective cover is provided with a plurality of hollow portions to connect the interior of the protective cover with the external environment.

[0012] Optionally, the outer ring of the sealing cover is provided with a positioning flange, and the caliper body is provided with a limiting step on the wall portion of the sealing space corresponding to the position of the positioning flange, and the positioning flange abuts against the end face of the limiting step to limit the position of the outer ring relative to the caliper body; one of the piston and the inner ring of the sealing cover is provided with a clamping portion, and the other is provided with a mounting groove, and the clamping portion is at least partially embedded in the mounting groove to limit the relative position of the inner ring and the piston.

[0013] Optionally, a plurality of air grooves are provided on the inner ring of the sealing cover, and the air grooves are arranged along the circumference of the inner ring. During the process of fixing the inner ring of the sealing cover to the piston, the gas between the sealing cover and the piston is discharged from the air grooves.

[0014] Optionally, a plurality of spaced protrusions are provided on the inner surface of the sealing portion of the sealing cover, and the spaced protrusions are in contact with the piston during the extension of the sealing portion.

[0015] Optionally, the sealing cover further includes a skeleton, and the skeleton is fixedly connected to the outer ring of the sealing cover.

[0016] The technical solution of the present invention has the following beneficial effects compared with the existing technology: the electronic mechanical brake caliper of the present invention can adjust the air pressure inside the sealed space through the elastic membrane to balance the pressure difference between the inside of the sealed space and the external environment, thereby avoiding the generation of reverse resistance during braking, and further avoiding increased energy consumption, which is conducive to energy saving and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a cross-sectional view of the electronic mechanical brake caliper of the present invention.

[0019] Figure 2 This is a schematic diagram of the electronic mechanical brake caliper of the present invention in the braking state.

[0020] Figure 3 This is a schematic diagram of the electronic mechanical brake caliper of the present invention in a released state.

[0021] Figure 4 This is an exploded view of the caliper body, sealing cover and piston in the electronic mechanical brake caliper of the present invention.

[0022] Figure 5 It is an isometric cross-sectional view of the sealing cover in the electronic mechanical brake caliper of the present invention.

[0023] Figure 6 It is an isometric cross-sectional view of the sealing cover in the electromechanical brake caliper of the present invention from another perspective.

[0024] In the picture:

[0025] 11-caliper body; 111-limiting step; 112-partition; 12-piston; 121-mounting slot; 13-end cover; 131-through hole; 14-driving element; 15-transmission assembly; 151-transmission rod; 152-movement ring; 16-brake pad assembly; 161-inner brake pad; 162-outer brake pad;

[0026] 2-sealing cover; 21-outer ring; 211-positioning flange; 212-frame; 22-inner ring; 221-clamping portion; 222-air groove; 223-spacer block; 224-spacer protrusion; 23-sealing portion;

[0027] 3-elastic membrane; 31-film body; 32-external frame; 321-connecting groove;

[0028] 4-sealed space; 41-piston chamber; 42-accommodating chamber; 43-ventilation hole. DETAILED DESCRIPTION

[0029] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the description of the present invention, all other embodiments derived by persons of ordinary skill in the art without inventive effort are also within the scope of protection of the present invention.

[0030] The orientations or positional relationships indicated by terms such as "upper", "lower", "top", "bottom", "inside", and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limitations on the utility model.

[0031] The terms "first," "second," and the like are merely used to distinguish between elements of similar nature and do not indicate or imply relative importance or a particular order.

[0032] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than the listed elements and may also include additional elements not specifically listed.

[0033] See also Figure 1The present invention provides an electronic mechanical brake caliper, comprising a caliper body 11, a piston 12, a driving element 14, a transmission assembly 15, and a brake pad assembly 16. In one example, a sealed space 4 is provided within the caliper body 11, and a partition 112 is provided within the sealed space 4, dividing the sealed space 4 into a piston chamber 41 and an accommodating chamber 42. The piston chamber 41 and the accommodating chamber 42 are connected via an air vent 43 provided on the partition 112. The piston 12 and the driving element 14 are respectively installed in the piston chamber 41 and the accommodating chamber 42. The brake pad assembly 16 comprises an inner brake pad 161 and an outer brake pad 162. The outer brake pad 162 is fixedly connected to the caliper body 11, and the inner brake pad 161 is connected to the piston 12. The driving element 14 is in transmission connection with the piston 12 via the transmission assembly 15, and is used to drive the piston 12 to perform linear reciprocating motion in the piston chamber 41, thereby driving the inner brake pad 161 to perform linear reciprocating motion in a direction close to or away from the outer brake pad 162. When the inner brake pad 161 moves to the preset first position and the second position, the brake caliper is adjusted to the braking state and the release state respectively, so that the braking force can be applied or released. For the convenience of description, the electronic mechanical brake caliper of the present invention is referred to as the brake caliper for short.

[0034] In one example, the driving element 14 is a motor, and the transmission assembly 15 includes a transmission rod 151 and a moving ring 152. The transmission rod 151 is connected to the output end of the driving element 14 and can rotate with the output end of the driving element 14. The moving ring 152 is sleeved on the transmission rod 151 and fixedly connected to the piston 12. The outer surface of the transmission rod 151 is provided with an external thread, and the inner surface of the moving ring 152 is provided with an internal thread. When the driving element 14 is working, its output end drives the transmission rod 151 to rotate, and further drives the moving ring 152 and the piston 12 to move axially through the engagement of the internal and external threads. Furthermore, the brake caliper also includes a reduction mechanism (not shown) connected between the driving element 14 and the transmission assembly 15.

[0035] As the brake pad assembly 16 wears, the length of the piston 12 extending relative to the piston chamber 41 needs to increase in order to fill the gap between the inner brake pad 161 and the brake disc caused by the wear of the brake pad assembly 16, so that the inner brake pad 161 contacts the brake disc. When the brake caliper is in the braking state, the position of the inner brake pad 161 exceeds the preset first position and is closer to the brake disc relative to the preset first position. At this time, the volume of the sealed space 4 increases, and accordingly, the vacuum degree within the sealed space 4 increases, causing a pressure difference on both sides of the piston 12, that is, between the sealed space 4 and the outside atmosphere. This pressure difference generates reverse resistance that pushes the piston 12 inward, pushing the piston 12 in the opposite direction. During long-term use, as the brake pad assembly 16 wears, the vacuum degree within the sealed space 4 will continue to increase. Overcoming the reverse resistance by increasing the driving force of the driving element 14 is not conducive to energy saving.

[0036] like Figure 2 and Figure 3 As shown, to balance the aforementioned pressure difference, the brake caliper of the present invention further includes an elastic membrane 3 , which is disposed within a through-hole 131 provided in the wall of the sealed space 4 . This membrane is used to balance the pressure difference between the sealed space 4 and the external environment, avoiding the need to increase the driving force of the driving element 14 to overcome reverse resistance, thereby facilitating energy conservation and consumption reduction. Specifically, when the piston 12 moves outward to a specific position and the pressure within the piston cavity 41 is lower than the pressure of the external environment, the elastic membrane 3 recesses inward to balance the pressure difference between the inside and outside of the sealed space 4 . When the piston 12 moves inward to a specific position and the pressure within the piston cavity 41 is higher than the pressure of the external environment, the elastic membrane 3 protrudes outward to balance the pressure difference between the inside and outside of the sealed space 4 .

[0037] Furthermore, the brake caliper of the present invention also includes an end cover 13, which is installed at the end of the accommodating chamber 42 away from the piston 12, and is used to cover the open end of the accommodating chamber 42 after the driving element 14 is installed. It can be understood that the end cover 13 can be installed on the caliper body 11 by fasteners such as bolts, or can be directly screwed by threaded connection, or fixed to the caliper body 11 by interference fit. The through hole 131 can be provided on the end cover 13 or the caliper body 11, or can be provided at other locations connected to the sealed space 4. In this embodiment, the through hole 131 is provided on the end cover 13, which can facilitate the installation and removal of the elastic membrane 3.

[0038] Specifically, the elastic membrane 3 includes a film body 31 and an external frame 32 connected to the edge of the film body 31. The film body 31 is arranged on the inner side of the external frame 32 and is integrally formed with the external frame 32. It can be understood that the film body 31 can also be fixedly connected to the external frame 32 by adhesive bonding, press-fit connection using a fixing ring, etc. The outer surface of the external frame 32 is recessed inward to form an annular connecting groove 321 extending along the circumference of the external frame 32. When installing the elastic membrane 3, the external frame 32 can be pressed so that the portion around the through hole 131 on the end cover 13 is embedded in the connecting groove 321, thereby fixing the elastic membrane 3 to the through hole 131. Optionally, an adhesive or sealant can be provided between the external frame 32 and the end cover 13 to improve the connection stability and sealing. In other connection methods, an internal thread can be set in the through hole 131 of the end cover 13, and an external thread can be set on the external frame 32, and the elastic membrane 3 can be installed on the end cover 13 by threaded matching. A fixing part extending outward perpendicular to the external frame 32 can also be set on the external frame 32, and the elastic membrane 3 can be installed on the end cover 13 by using bolts or other fixing parts to pass through the fixing part and the end cover 13.

[0039] The brake caliper of the present invention optionally further includes a protective cover (not shown) located outside the end cap 13 to protect the elastic membrane 3 and prevent damage. The end surface of the protective cover is provided with a plurality of hollow portions to connect the interior of the protective cover with the external environment. Optionally, a certain distance is provided between the end surface of the protective cover facing the end cap 13 and the end cap 13 to accommodate the deformation space when the elastic membrane 3 bulges outward. In other embodiments, the portion of the protective cover facing the elastic membrane 3 is provided with an outwardly convex arc, which can also accommodate the deformation space when the elastic membrane 3 bulges outward.

[0040] Furthermore, the brake caliper of the present invention also includes a sealing cover 2, which can be made of a material with a certain degree of flexibility such as rubber, silicone, etc. The sealing cover 2 is arranged between the piston 12 and the caliper body 11, and is used to maintain the sealing of the sealing space 4 when the piston 12 moves linearly relative to the caliper body 11.

[0041] See also Figures 4 to 6 In one example, the sealing cover 2 is annular as a whole, and has an outer ring 21 and an inner ring 22 relative to each other, and a sealing portion 23 located between the outer ring 21 and the inner ring 22. The inner ring 22 of the sealing cover 2 is radially arranged on the inner side of the outer ring 21, and can move axially relative to the outer ring 21. The sealing portion 23 includes one or more pleated structures, which can be stretched and expanded when the inner ring 22 moves axially outward relative to the outer ring 21, and can also be squeezed and folded when the inner ring 22 moves axially inward relative to the outer ring 21. In the present utility model, the outer ring 21 of the sealing cover 2 is fixedly connected to the caliper body 11, and the inner ring 22 of the sealing cover 2 is fixedly connected to the end of the piston 12 close to the inner brake pad 161.

[0042] Specifically, an opening is formed at one end of the caliper body 11 near the brake pad assembly 16 for the piston 12 to pass through. The outer ring 21 of the sealing cover 2 is inserted into the caliper body 11 through the opening and is fixedly connected to the caliper body 11. The inner ring 22 of the sealing cover 2 is sleeved on the outer surface of the piston 12 and is fixedly connected to the piston 12. When the piston 12 reciprocates between the first position and the second position, the inner ring 22 of the sealing cover 2 reciprocates with the piston 12. In addition, the sealing portion 23 can extend and retract relative to the caliper body 11, thereby ensuring the sealing of the piston cavity 41 during movement and preventing impurities such as dust and moisture from entering the piston cavity 41.

[0043] Furthermore, the outer ring 21 of the sealing cover 2 is provided with a positioning flange 211, and the caliper body 11 is provided with a limiting step 111. The positioning flange 211 cooperates with the limiting step 111 to limit the position of the outer ring 21 relative to the caliper body 11, which facilitates installation and ensures that it is installed in place; one of the piston 12 and the inner ring 22 of the sealing cover 2 is provided with an annular clamping portion 221, and the other is provided with an annular mounting groove 121, and the clamping portion 221 is at least partially embedded in the mounting groove 121 to limit the relative position of the inner ring 22 and the piston 12.

[0044] In one example, a limiting step 111 is provided within an opening of the caliper body 11 near the end of the inner brake pad 161. The diameter of the end of the caliper body 11 near the inner brake pad 161 is greater than the diameter of the other portions of the inner surface of the sidewall of the opening, forming the limiting step 111 on the inner wall of the opening. A positioning flange 211 is provided on the outer surface of the outer ring 21 of the sealing cover 2, protruding radially outward from the circumferential outer surface of the outer ring 21 of the sealing cover 2. The end surface of the positioning flange 211 away from the inner brake pad 161 abuts against the end surface of the limiting step 111, thereby limiting the position of the outer ring 21 relative to the caliper body 11.

[0045] In one example, the clamping portion 221 is provided on the inner ring 22 of the sealing cover 2, protruding radially inward from the inner surface of the inner ring 22 of the sealing cover 2, and the mounting groove 121 is provided on the circumferential outer surface of the piston 12, recessed radially inward from the circumferential outer surface of the piston 12. Preferably, the cross-section of the clamping portion 221 is an arc-shaped, which facilitates the clamping portion 221 to be embedded in the mounting groove 121.

[0046] Optionally, the inner ring 22 of the sealing cover 2 is further provided with a plurality of air grooves 222, which are evenly arranged along the circumference of the sealing cover 2 and are used to discharge air between the sealing cover 2 and the piston 12 during the process of installing the inner ring 22 of the sealing cover 2 to the piston 12, thereby facilitating the installation of the sealing cover 2 on the piston 12. Specifically, the air grooves 222 are provided on the clamping portion 221, and are recessed from the clamping portion 221 toward the wall of the sealing cover 2. The bottom surface of the air grooves 222 is inclined relative to the inner wall surface of the inner ring 22 of the sealing cover 2. In this way, a gap can be formed between the surface of the arc-shaped clamping portion 221 and the bottom surface of the air grooves 222, thereby facilitating the discharge of gas.

[0047] Optionally, a number of spacer blocks 223 are provided between the inner ring 22 of the sealing cover 2 and the piston 12. These spacer blocks 223 are located on the side of the clamping portion 221 close to the outer ring 21 of the sealing cover 2, arranged along the circumference of the sealing cover 2, and close to the air groove 222. They are used to separate the inner ring 22 of the sealing cover 2 and the piston 12, so that there is a gap between the sealing cover 2 and the piston 12, so that the gas between the sealing cover 2 and the piston 12 can smoothly enter the air groove 222 and be discharged through the air groove 222, making the assembly of the sealing cover 2 and the piston 12 easier.

[0048] Optionally, the sealing cover 2 is formed with a plurality of spaced protrusions 224 on the inner surface of the sealing portion 23 (the surface close to the sealing space 4), and these spaced protrusions 224 are arranged at intervals along the circumferential direction of the sealing portion 23. The spaced protrusions 224 are in the shape of spherical, conical, truncated cone or other convex points, or in the shape of cylindrical, prism or other long strips, so as to reduce the contact area between the inner surface of the sealing cover 2 and the piston 12, and avoid adhesion between the sealing portion 23 and the piston 12 during the stretching or folding process.

[0049] Please continue reading Figure 4 The sealing cover 2 further includes a skeleton 212, which is fixedly connected to the outer ring 21 of the sealing cover 2 by integral injection molding, clamping, bonding, press-fitting, or compression molding. The skeleton 212 enhances the structural stability of the sealing cover 2, ensures that the sealing cover 2 can maintain the correct shape and position, and further ensures a good seal between the sealing cover 2 and the caliper body 11. In one example, the skeleton 212 is integrally injection molded with the sealing cover 2. Optionally, the surface of the skeleton 212 is recessed along its radial direction to form a through-hole for allowing molten rubber or other materials to flow in.

[0050] Preferably, the skeleton 212 is a hollow cylindrical shape, and the outer surface of the skeleton 212 extends radially to form a flange-shaped positioning portion 212a. The positioning portion 212a is fitted with the positioning flange 211 of the outer ring 21, or the positioning portion 212a is fixedly embedded in the positioning flange 211. The positioning portion 212a cooperates with the limiting step 111 to limit the relative position of the outer ring 21 of the sealing cover 2 and the caliper body 11 to ensure that it is installed in place.

[0051] In summary, the electronic mechanical brake caliper of the present invention provides a through hole 131 in the wall of the sealed space 4 and an elastic membrane 3 at the through hole 131. The deformation of the elastic membrane 3 can adjust the air pressure within the sealed space 4 to balance the pressure difference between the interior of the sealed space 4 and the external environment, thereby avoiding increased energy consumption to overcome reverse resistance during braking, thereby facilitating energy conservation and consumption reduction. A protective cover is provided outside the end cap 13 to protect the elastic membrane 3 and prevent damage to the elastic membrane 3. The provision of the sealing cover 2 allows a portion of the sealing cover 2 to move with the piston 12, ensuring the sealing of the sealed space 4 during the movement of the piston 12.

[0052] The above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. An electromechanical brake caliper, characterized in that: The invention comprises a caliper body (11), a piston (12), a sealing cover (2) and an elastic membrane (3), wherein a sealing space (4) is provided in the caliper body (11), and the piston (12) is slidably provided in the sealing space (4); the sealing cover (2) has an outer ring (21) and an inner ring (22) relative to each other, the outer ring (21) is fixedly connected to the caliper body (11), and the inner ring (22) is fixedly connected to the piston (12), and a retractable sealing portion (23) is provided between the outer ring (21) and the inner ring (22); a through hole (131) is provided on the wall of the sealing space (4) for connecting the sealing space (4) and the external environment, and the elastic membrane (3) is provided at the through hole (131) for balancing the pressure difference between the sealing space (4) and the external environment.

2. The electromechanical brake caliper according to claim 1, characterized in that: It also includes an end cover (13), which is mounted on an end of the caliper body (11) away from the piston (12), and the through hole (131) is provided on the end cover (13).

3. The electromechanical brake caliper according to claim 2, characterized in that: The elastic membrane (3) comprises a membrane body (31) and an external frame (32) fixedly connected to the edge of the membrane body (31), and the membrane body (31) is mounted on the end cover (13) via the external frame (32).

4. The electromechanical brake caliper according to claim 1, characterized in that: The sealed space (4) comprises a piston chamber (41) for accommodating the piston (12) and an accommodating chamber (42) for accommodating the driving element (14); the piston chamber (41) and the accommodating chamber (42) are separated by a partition (112) and communicated with each other through an air vent (43) provided on the partition (112).

5. The electromechanical brake caliper according to claim 4, characterized in that: A transmission rod (151) and a movement ring (152) are provided between the output end of the driving element (14) and the piston (12); the transmission rod (151) is connected to the output end of the driving element (14); the movement ring (152) is fixedly connected to the piston (12); and the movement ring (152) and the transmission rod (151) are respectively provided with internal threads and external threads that match each other.

6. The electromechanical brake caliper according to claim 2, characterized in that: It also includes a protective cover, which is located outside the end cover (13), and the end surface of the protective cover is provided with a plurality of hollow parts to connect the interior of the protective cover with the external environment.

7. The electromechanical brake caliper according to claim 1, characterized in that: The outer ring (21) of the sealing cover (2) is provided with a positioning flange (211), and the caliper body (11) is provided with a limiting step (111) on the wall portion of the sealing space (4) corresponding to the position of the positioning flange (211), and the positioning flange (211) and the end face of the limiting step (111) are abutted against each other to limit the position of the outer ring (21) relative to the caliper body (11); one of the piston (12) and the inner ring (22) of the sealing cover (2) is provided with a clamping portion (221), and the other is provided with a mounting groove (121), and the clamping portion (221) is at least partially embedded in the mounting groove (121) to limit the relative position of the inner ring (22) and the piston (12).

8. The electromechanical brake caliper according to claim 7, characterized in that: A plurality of air grooves (222) are provided on the inner ring (22) of the sealing cover (2), and the air grooves (222) are arranged along the circumference of the inner ring (22). When the inner ring (22) of the sealing cover (2) is fixed to the piston (12), the gas between the sealing cover (2) and the piston (12) is discharged from the air grooves (222).

9. The electromechanical brake caliper according to claim 1, characterized in that: A plurality of spaced protrusions (224) are provided on the inner surface of the sealing portion (23) of the sealing cover (2), and the spaced protrusions (224) are in contact with the piston (12) during the extension of the sealing portion (23).

10. The electromechanical brake caliper according to claim 1, characterized in that: The sealing cover (2) further comprises a skeleton (212), wherein the skeleton (212) is fixedly connected to the outer ring (21) of the sealing cover (2).

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