Brake caliper and electromechanical brake

Abstract

The utility model provides a brake caliper and an electromechanical brake. The brake caliper comprises a friction plate support and a housing, the friction plate support is provided with a first friction plate and a second friction plate which are oppositely arranged in the axial direction, the friction plate support comprises a first channel and a second channel which are located on the two sides of the first friction plate and the two sides of the second friction plate in the axial direction, and the housing comprises a first mounting hole and a second mounting hole. A first guide pin and a second guide pin are installed on the brake body through the first installation hole and the second installation hole respectively, and the first guide pin and the second guide pin are inserted into the first channel and the second channel of the friction plate support respectively. The cover shell can be mounted on the friction plate bracket in an axial sliding manner; and the first guide pin is mounted in the first mounting hole in a riveting manner. According to the brake caliper, connection between the friction plate support and the housing is more stable.

Description

Technical Field

[0001] The present application relates to the field of brake devices, and more particularly, to an electromechanical brake. Background Art

[0002] Electromechanical brakes, which use a motor to drive a caliper, offer advantages over traditional hydraulic brakes, such as faster response, simpler structure, and easier maintenance. As vehicles move toward electrification and intelligent driving, electromechanical brakes are becoming a trend in braking systems due to their easier integration with electric control systems.

[0003] Electromechanical brakes typically consist of a brake caliper and a brake actuator. The caliper housing is connected to the brake actuator and suspended axially from the friction pad support via guide pins. Due to mounting constraints, the guide pins are typically provided with bolt holes for bolt attachment to the brake body. However, since the center of gravity of the brake actuator is outside the supported friction pad support, the guide pins resemble cantilevered arms, subjecting the bolts attached to them to significant stress. Furthermore, the bolt size is limited by the guide pin's bolt hole. 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, a brake caliper is provided, comprising:

[0006] a friction plate bracket, wherein a first friction plate and a second friction plate are provided on the friction plate bracket in an axially opposed relationship, wherein when the friction plate bracket of the electronic mechanical brake is fixedly mounted to a vehicle, the first friction plate and the second friction plate are respectively located on opposite sides of a brake disc, and the friction plate bracket includes a first channel and a second channel in an axial direction located on either side of the first friction plate and the second friction plate; and

[0007] a cover shell, the cover shell comprising a first mounting hole and a second mounting hole, a first guide pin and a second guide pin being mounted to the cover shell through the first mounting hole and the second mounting hole, respectively, and the first guide pin and the second guide pin being inserted into the first channel and the second channel of the friction plate bracket, respectively, so that the cover shell can be axially slidably mounted to the friction plate bracket;

[0008] Wherein, the first guide pin is mounted to the first mounting hole by riveting.

[0009] Optionally, in an embodiment of the brake caliper, the first guide pin has a flange and a long end and a short end on both sides of the flange. When the first guide pin is installed to the first mounting hole, the short end is inserted into the first mounting hole so that the flange abuts against the first side of the first mounting hole, and the portion of the short end exposed from the second side of the first mounting hole is riveted.

[0010] Optionally, in an embodiment of the brake caliper, the second side of the first mounting hole comprises a countersunk hole, and the exposed portion of the short end is press-filled into the countersunk hole.

[0011] Optionally, in an embodiment of the brake caliper, the first mounting hole includes a tapered surface section at a position connected to the counterbore.

[0012] Optionally, in an embodiment of the brake caliper, the flange includes a step portion, and the step portion together with the first side of the first mounting hole defines an annular groove, and the annular groove is used to install a first sealing sleeve, wherein the first end of the first sealing sleeve is installed to the annular groove, and the second end of the first sealing sleeve is installed to the first groove on the inner side of the first channel near the first end of the first mounting hole, and the first sealing sleeve is retractable.

[0013] Optionally, in an embodiment of the brake caliper, the second end of the first channel away from the first mounting hole is configured to be closed, wherein the end of the first guide pin has a groove, and a bushing is installed in the groove.

[0014] Optionally, in an embodiment of the brake caliper, a second end of the first channel away from the first mounting hole is configured to be open, and a long end of the first guide pin extends out of the first channel, so that during braking, when the cover slides axially relative to the friction plate holder, the length of the contact section between the first guide pin and the first channel remains unchanged;

[0015] wherein the inner side of the end portion of the second end of the first channel has an inner groove for installing a second sealing sleeve, and the second sealing sleeve comprises a bushing portion arranged on the inner side of the end portion of the second end of the first channel and a covering portion closing the second end of the first channel; or

[0016] The outer side of the second end of the first channel is provided with an outer groove for installing a third sealing sleeve, and the inner side of the first channel is provided with an inner groove for installing an inner liner.

[0017] Optionally, in an embodiment of the brake caliper, the second mounting hole has an internal thread, the second guide pin has an external thread, and the second guide pin is connected to the second mounting hole by engagement of the external thread and the internal thread.

[0018] Optionally, in an embodiment of the brake caliper, the second mounting hole is longer in axial direction than the first mounting hole, a torque application portion is provided on the end face of the second guide pin, the second end of the second channel away from the second mounting hole is configured to be closed, and the length of the contact section between the first guide pin and the first channel is longer than the length of the contact section between the second guide pin and the second channel.

[0019] Optionally, during braking, the end of the long end of the first guide pin and the end of the second guide pin are located on both axial sides of the first friction plate.

[0020] According to another aspect, there is also provided an electromechanical brake comprising:

[0021] A brake caliper according to various embodiments; and

[0022] A brake actuator is connected to the housing of the brake caliper.

[0023] Optionally, in an embodiment of the electronic mechanical brake, the brake drive device includes: a main module connected to the cover shell and a motor and an electronic control unit connected to the main module, wherein the first mounting hole and the second mounting hole are arranged on the inner flanges on both sides of the inner end of the cover shell, the main module includes an active end passing through the cavity of the cover shell and acting on the first friction plate, and the cover shell includes an outer end portion acting on the second friction plate.

[0024] The connection between the friction plate support and the brake body in the electromechanical brake according to the embodiment is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The disclosure of this application will be more easily understood with reference to the accompanying drawings. Those skilled in the art will readily appreciate 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 figures represent similar components, where:

[0026] Figure 1 shows an exploded view of an electromechanical brake according to an embodiment when assembled to a wheel hub;

[0027] Figure 2 shows a perspective view of an electromechanical brake according to an embodiment;

[0028] Figure 3 shows an end view of the brake caliper portion of an electromechanical brake;

[0029] Figure 4 Shown by Figure 3 Cross-sectional view of section AA in FIG;

[0030] Figure 5 shows a cross-sectional view of a brake caliper during assembly according to an embodiment;

[0031] Figure 6 Shown Figure 5 A partial enlarged view of

[0032] Figure 7 and Figure 8 1. The perspective views of the first guide pin according to the embodiment are respectively shown before and after riveting;

[0033] Figure 9 shows a partial cross-sectional view of a brake caliper according to an alternative embodiment;

[0034] Figure 10 shows a partial cross-sectional view of a brake caliper according to another alternative embodiment;

[0035] Figure 11 shows a partial cross-sectional view of a brake caliper according to yet another alternative embodiment;

[0036] Figure 12 Shown Figure 11 A perspective view of the first guide pin in FIG;

[0037] Figure 13 Shown Figure 12 A partially enlarged view of the first guide pin in FIG; and

[0038] Figure 14 Shown Figure 11 A partial enlarged view of . DETAILED DESCRIPTION

[0039] Figure 1 The figure shows an installation diagram of an electromechanical brake, which includes a rotating shaft 91, a shock absorber 92, a bearing 94, a steering knuckle arm 93, a brake disc 95, and a wheel 96. The figure also shows an electromechanical brake 100 according to an embodiment, which is driven by a motor to clamp the brake disc 95 with a brake caliper to provide braking force. During assembly, the electromechanical brake 100 is mounted on the steering knuckle arm 93 and is accommodated in a compact space inside the wheel hub of the wheel 96.

[0040] Continue to refer Figures 2 to 8The following describes an electromechanical brake according to an embodiment. The electromechanical brake generally comprises a brake caliper and a brake actuator 2. The brake caliper includes a friction pad holder 1 and a housing 21. The friction pad holder 1 is mounted near a wheel on a vehicle, such as by being fixed to a steering knuckle arm 93, through a pair of through-holes 10, so that the clamping opening 101 of the friction pad holder 1 is aligned with the brake disc 95. The friction pad holder 1 is provided with axially opposed first and second friction pads 71 ​​and 72. When the friction pad holder 1 of the electromechanical brake is fixed to the vehicle, the first and second friction pads 71 ​​and 72 are located on opposite sides of the brake disc 95. When braking is required, the motor-driven brake actuator 2 causes the first and second friction pads 71 ​​and 72 to clamp against the brake disc 95, thereby achieving braking. The friction pad holder 1 includes first and second axial channels 11 and 12 located on either side of the first and second friction pads 71 ​​and 72. The housing 21 is axially slidably mounted to the friction pad holder 1 by means of the first and second channels 11 and 12.

[0041] More specifically, the cover 21 includes a first mounting hole 211 and a second mounting hole 212, and the first guide pin 31 and the second guide pin 41 are respectively mounted to the cover 21 through the first mounting hole 211 and the second mounting hole 212, and the first guide pin 31 and the second guide pin 41 are respectively inserted into the first channel 11 and the second channel 12 of the friction plate bracket, thereby enabling the cover 21 to be axially slidably mounted to the friction plate bracket 1. In this application, as Figures 4 to 8 As shown, the first guide pin 31 is riveted to the first mounting hole 211. By passing the first guide pin 31 through the first mounting hole 211 and riveting it to the first mounting hole 211, the diameter of the first mounting hole 211 can be made comparable to the diameter of the first guide pin 31, compared to a solution where a bolt is passed through the first mounting hole 211 to secure the first guide pin 31, allowing it to withstand greater stress. Furthermore, the riveted first guide pin 31 exhibits greater robustness.

[0042] In some embodiments, the cover 21 at least partially covers the friction plate bracket 1, and the brake actuator 2 includes a main module 23 connected to the cover 21, and a motor 22 and an electronic control unit 24 connected to the main module 23. The first mounting hole 211 and the second mounting hole 212 can be located on the inner flange 214 on both sides of the inner end of the cover 21. The electronic control unit 24 includes a port connected to the vehicle wiring harness to receive a braking command and control the brake motor to output a braking torque. The braking torque is transmitted through the transmission mechanism in the internal chamber 210 of the cover 21, and directly acts on the first friction plate 71 through the active end of the transmission mechanism, such as a plunger, to push the first friction plate 71 toward the brake disc 95. When the first friction plate 71 engages with the brake disc 95, since the plunger cannot move further, its reaction force on the brake actuator 2 causes the cover 21, the main module 23, the motor 22 and the electronic control unit 24 to slide axially relative to the friction plate bracket 1 ( Figure 1 or Figure 4 The outer end 213 of the housing 21 then drives the second friction plate 72 to the right and engages the brake disc 95, thereby achieving clamping and braking. For the detailed structure of the brake actuator 2, reference may be made to the Chinese invention patent application with publication number CN117267280A, entitled "Electromechanical Brake," which is incorporated herein by reference in its entirety. Since the main module 23, motor 22, and electronic control unit 24 are not the focus of this application, for the sake of clarity, the following are omitted. Figure 1 In the other figures except FIG1 , only the brake caliper is shown, and the brake actuator 2 including the main module 23, the motor 22 and the electronic control unit 24 is omitted. In alternative embodiments, the brake caliper according to the embodiment can also be assembled with other suitable brake actuators 2.

[0043] In some embodiments, the first guide pin 31 has a flange 313 and a long end 311 and a short end 312 on both sides of the flange 313. The long end 311 is used to be installed in the first channel 11, and the short end 312 is used to be riveted to the first mounting hole 211. More specifically, as Figure 5 As shown, when the first guide pin 31 is installed in the first mounting hole 211, the short end 312 is inserted into the first mounting hole 211 so that the flange 313 abuts the first side 2111 of the first mounting hole 211, and the portion of the short end 312 exposed from the second side 2112 of the first mounting hole is subjected to pressure riveting. During the pressure riveting, the long end 311 of the first guide pin 31 can be clamped by a clamp, and the pressure head presses down from the short end 312, causing the exposed portion of the short end 312 to deform. In some embodiments, the second side of the first mounting hole 211 includes a countersunk hole 2110, and the exposed portion of the short end 312 is pressed into the countersunk hole 2110. Figure 7 and Figure 8 As can be seen from the comparison of the first guide pin 31 after riveting, the short end 312 of the first guide pin 31 forms a protrusion 3120 that is filled into the counterbore 2110. Figure 6As shown, in some embodiments, the first mounting hole 211 includes a tapered section 2113 at a position connected to the counterbore 2110 , thereby improving the stability of riveting.

[0044] exist Figure 4 In the illustrated embodiment, the first channel 11 has a first end proximate to the first mounting hole 211 and a second end opposite the first end and distal to the first mounting hole 211. The second end of the first channel 11 may be open, and the long end 311 of the first guide pin extends out of the first channel 11. The long end 311 of the first guide pin is configured such that, during braking, when the brake actuator 2 and the housing 21 slide axially relative to the friction plate support 1, the length of the contact section between the first guide pin 31 and the first channel 11 remains constant. This prevents increased stress on the first guide pin due to changes in the length of the contact section.

[0045] In some embodiments, the second end of first channel 11 has an inner groove on its inner side for mounting second sealing sleeve 39. Second sealing sleeve 39 includes a bushing portion 391 disposed on the inner side of the second end of first channel 11 and a cover portion 392 that closes the second end of first channel 11. Bushing portion 391 provides cushioning during sliding, while cover portion 392 prevents dust, moisture, etc. from entering first channel 11. In some embodiments, second sealing sleeve 39 may be retractable.

[0046] exist Figure 4 In the illustrated embodiment, the first guide pin 31 has a protrusion 319 near the flange 313, and a slot is defined between the protrusion 319 and the flange 313 for installing the first sealing sleeve 38. One end of the first sealing sleeve 38 is connected to the slot between the protrusion 319 and the flange 313, and the other end of the first sealing sleeve 38 is formed into a bushing portion 381 at the first end of the first channel 11. The first sealing sleeve 38 is retractable and also serves as a buffer and dustproof and waterproof function.

[0047] In some embodiments, the second mounting hole 212 has internal threads, and the second guide pin 41 has external threads, with the second guide pin 41 connected to the second mounting hole 212 via the engagement of the external and internal threads. In some embodiments, the second mounting hole 212 is axially longer than the first mounting hole 211, thereby increasing the length of the contact segment between the second guide pin 41 and the second mounting hole 212. In some embodiments, the end surface of the second guide pin 41 includes a torque application portion 411 to facilitate installation of the second guide pin 41. In some embodiments, the second end of the second channel 12, distal from the second mounting hole 212, is closed. An elastic gasket 49 and a dust cover 48 may be positioned between the second guide pin 41 and the second channel 12. Furthermore, an additional dust cover 47 may be positioned in the second mounting hole 212. It should be understood that the contact segment between the first guide pin 31 and the first channel 11 is longer than the contact segment between the second guide pin 41 and the second channel 12. The second guide pin 41 may also be referred to as the main guide pin, while the first guide pin 31 primarily serves to limit rotation and provide auxiliary load-bearing functions.

[0048] In some embodiments, during braking, that is, when the first friction plate 71 and the second friction plate 72 clamp the brake disc 95, the end of the long end 312 of the first guide pin 31 and the end 412 of the second guide pin 41 are located on both axial sides of the first friction plate 71.

[0049] Continue to refer Figure 9 , which shows a variation. In this embodiment, the outer side of the second end of the first channel 11 has an outer groove for mounting a third sealing sleeve 371, and the inner side of the first channel 11 has an inner groove for mounting an inner sleeve 372. The inner sleeve 372 provides cushioning, while the third sealing sleeve 371 provides waterproof and dustproof protection.

[0050] Continue to refer Figure 10 In an alternative embodiment, the second end of the first channel 11 is configured to be closed, and the end of the first guide pin 31 has a groove in which a bushing 36 is installed. In this configuration, dust and water resistance are achieved by closing the second end of the first channel 11, and the bushing 36 is provided in the groove of the first guide pin 31 to provide a buffer.

[0051] refer to Figures 11 to 14Let's introduce another variation. Considering that forming a raised portion 319 on the surface of the first guide pin presents difficulties in parts processing, in this embodiment, the flange 313 is constructed to include a step portion 3131, which is located on the side of the flange body 3130 close to the short end 312 and has a diameter smaller than the flange body 3130. After the first guide pin 313 is riveted to the first mounting hole 211, the step portion 3131 and the first side of the first mounting hole together define an annular groove for installing a replacement first sealing sleeve 38'. The first end 381' of the first sealing sleeve is installed in the annular groove, and the second end of the first sealing sleeve is installed in the first card groove on the inner side of the first end of the first channel 11 close to the first mounting hole, and the first sealing sleeve 38' is retractable. In some embodiments, the transition surface 3132 from the flange 313 to the long end 311 is arc-shaped, and the side of the flange 313 facing the long end 311 is formed as a slope 3133. As Figure 14 As shown, in this embodiment, the first mounting hole 211 includes a tapered surface section 2113 at a position connected to the counterbore 2110 , thereby improving the stability of riveting.

[0052] In some embodiments, an electromechanical brake is also provided, comprising a brake caliper according to various embodiments and a brake actuator 2 connected to a housing 21 of the brake caliper. The brake actuator 2 includes a main module 23 mounted to the housing 21, as well as a motor 22 and an electronic control unit 24 connected to the main module 23. First and second mounting holes are provided on side flanges 214 on either side of the inner end of the housing. The main module 23 includes an active end that passes through an internal chamber 210 of the housing 21 and acts on the first friction plate 71. The housing 21 includes an outer end 213 that acts on the second friction plate 72. In alternative embodiments, the brake actuator 2 may have other suitable structures.

[0053] The specific embodiments described above are intended only to more clearly illustrate the principles of the present invention, wherein the various components are clearly shown or described to facilitate understanding of the principles of the present invention. Those skilled in the art may readily make various modifications or variations to the present invention without departing from the scope of the present invention. It should be understood that such modifications or variations are intended to be encompassed within the scope of the present invention.

Claims

1. A brake caliper, characterized in that: include: A friction plate bracket (1), wherein a first friction plate (71) and a second friction plate (72) are provided on the friction plate bracket (1) and are axially opposed to each other; when the friction plate bracket (1) of the electronic mechanical brake is fixedly mounted on a vehicle, the first friction plate (71) and the second friction plate (72) are respectively located on opposite sides of a brake disc (95); and the friction plate bracket (1) includes a first channel (11) and a second channel (12) located on both sides of the first friction plate (71) and the second friction plate (72) along the axial direction; and A cover shell (21), the cover shell (21) comprising a first mounting hole (211) and a second mounting hole (212), a first guide pin (31) and a second guide pin (41) being mounted to the cover shell (21) through the first mounting hole (211) and the second mounting hole (212), respectively, and the first guide pin (31) and the second guide pin (41) being inserted into the first channel (11) and the second channel (12) of the friction plate bracket (1), respectively, so that the brake body can be axially slidably mounted to the friction plate (1) bracket; Wherein, the first guide pin (31) is mounted to the first mounting hole (211) by riveting.

2. The brake caliper according to claim 1, characterized in that: The first guide pin (31) has a flange (313) and a long end (311) and a short end (312) on both sides of the flange (313). When the first guide pin (31) is installed in the first mounting hole (211), the short end (312) is inserted into the first mounting hole (211) so that the flange (313) abuts against the first side of the first mounting hole (211), and the portion of the short end (312) exposed from the second side of the first mounting hole is subjected to a riveting process.

3. The brake caliper according to claim 2, characterized in that The second side of the first mounting hole (211) includes a countersunk hole (2110), and the exposed portion of the short end (312) is press-filled into the countersunk hole (2110).

4. The brake caliper according to claim 2, characterized in that: The first mounting hole (211) includes a tapered section (2113) at a position connected to the counterbore (2110).

5. The brake caliper according to claim 2, characterized in that: The flange (313) includes a step portion (3131), and the step portion (3131) defines an annular groove together with the first side of the first mounting hole. The annular groove is used to install a first sealing sleeve (38'), wherein the first end of the first sealing sleeve (38') is installed in the annular groove, and the second end of the first sealing sleeve is installed in a first groove on the inner side of the first channel (11) close to the first end of the first mounting hole, and the first sealing sleeve (38') is retractable.

6. The brake caliper according to claim 1, characterized in that The second end of the first channel (11) away from the first mounting hole is configured to be closed, wherein the end of the first guide pin (31) has a groove, and a bushing (36) is installed in the groove.

7. The brake caliper according to claim 1, characterized in that The second end of the first channel (11) away from the first mounting hole is configured to be open, and the long end (311) of the first guide pin extends out of the first channel (11), so that during braking, when the cover (21) slides axially relative to the friction plate bracket (1), the length of the contact section between the first guide pin (31) and the first channel (11) remains unchanged; wherein the inner side of the end of the second end of the first channel (11) has an inner groove for installing a second sealing sleeve (39), and the second sealing sleeve (39) comprises a bushing portion (391) arranged on the inner side of the end of the second end of the first channel (11) and a covering portion (392) closing the second end of the first channel (11); or The outer side of the second end of the first channel (11) has an outer groove for installing a third sealing sleeve (371), and the inner side of the first channel (11) has an inner groove for installing an inner liner (372).

8. The brake caliper according to claim 1, characterized in that The second mounting hole (212) has an internal thread, the second guide pin (41) has an external thread, and the second guide pin (41) is connected to the second mounting hole (212) by engaging the external thread and the internal thread, wherein, during braking, the end of the long end (311) of the first guide pin and the end (412) of the second guide pin (41) are located on both axial sides of the first friction plate (71).

9. The brake caliper according to claim 8, characterized in that: The second mounting hole (212) has a greater axial length than the first mounting hole (211), a torque applying portion (411) is provided on the end face of the second guide pin (41), the second end of the second channel (12) away from the second mounting hole is configured to be closed, and the length of the contact section between the first guide pin (31) and the first channel (11) is greater than the length of the contact section between the second guide pin (41) and the second channel (12).

10. An electromechanical brake, characterized in that: It includes: The brake caliper according to any one of claims 1 to 9; as well as A brake actuator (2) is connected to a housing (21) of the brake caliper.

11. The electromechanical brake according to claim 10, characterized in that The brake drive device includes: a main module (23) connected to the cover (21) and a motor (22) and an electronic control unit (24) connected to the main module (23), wherein the first mounting hole and the second mounting hole are arranged on the inner flange (214) on both sides of the inner end of the cover, the main module (23) includes an action end that passes through the internal chamber (21O) of the cover (21) and acts on the first friction plate (71), and the cover (21) includes an outer end (213) that acts on the second friction plate (72).

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