Electromechanical brake

Abstract

The utility model provides an electromechanical brake. The electronic mechanical brake comprises a friction plate support, the friction plate support is provided with a first friction plate and a second friction plate which are oppositely arranged in the axial direction, and 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 a brake body, the brake body including a first mounting hole and a second mounting hole, a first guide pin and a second guide pin being mounted to the brake body through the first mounting hole and the second mounting hole, respectively, the first guide pin and the second guide pin are respectively inserted into the first channel and the second channel of the friction plate bracket; wherein the outer end of the first channel and / or the outer end of the second channel are / is open, and the outer end of the first guide pin and / or the outer end of the second guide pin extend out of the first channel and / or the second channel. The electromechanical brake according to the embodiment relieves the stress on the guide pin.

Description

Technical Field

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

[0002] An electromechanical brake is a device that realizes braking by driving a brake caliper with a motor. Compared with traditional hydraulic pipeline braking, it has the advantages of fast response, simple structure, and easy maintenance. With the development of vehicles towards electrification and intelligence, electromechanical brakes have become the development trend of braking systems because they are easier to integrate with electric control systems.

[0003] An electromechanical brake generally includes a friction plate bracket and a brake body. The brake body is axially movably suspended on the friction plate bracket through a guide pin. Due to installation limitations, the guide pin is generally provided with a bolt hole for installation to the brake body through a bolt. However, since the center of gravity of the brake body is outside the supported friction plate bracket, the bolt installed to the guide pin, which is similar to a cantilever, will be subjected to a large stress, and the size of the bolt is further limited by the bolt hole of the guide pin.

[0004] On the other hand, the length of the contact section between the guide pin and the channel of the friction plate bracket will change as the brake body moves. When the brake body moves away from the supported friction plate bracket, the stress on the guide pin itself will increase. Summary of the Utility Model

[0005] The purpose of the present application is to solve or at least alleviate one or more problems existing in the prior art.

[0006] An electromechanical brake, comprising:

[0007] A friction plate bracket, on which a first friction plate and a second friction plate are axially opposed. When the friction plate bracket of the electromechanical brake is fixedly installed on a vehicle, the first friction plate and the second friction plate are respectively located on opposite sides of a brake disc. The friction plate bracket includes a first channel and a second channel along the axis on both sides of the first friction plate and the second friction plate; and

[0008] A brake body, the brake body includes a first mounting hole and a second mounting hole. A first guide pin and a second guide pin are respectively installed to the brake body through the first mounting hole and the second mounting hole, and the first guide pin and the second guide pin are respectively inserted into the first channel and the second channel of the friction plate bracket, so that the brake body can be axially slidably installed on the friction plate bracket;

[0009] Wherein, the outer ends of the first channel and / or the second channel are open, and the outer ends of the first guide pin and / or the second guide pin extend out of the first channel and / or the second channel.

[0010] Optionally, in the embodiment of the electromechanical brake, the first guide pin and / or the second guide pin are configured such that during the braking process, when the brake body slides axially relative to the friction plate bracket, the length of the contact section between the first guide pin and the first channel and / or the second guide pin and the second channel remains unchanged.

[0011] Optionally, in the embodiment of the electromechanical brake, the outer end of the first guide pin and / or the outer end of the second guide pin are installed in the third mounting hole and / or the fourth mounting hole on the brake body.

[0012] Optionally, in the embodiment of the electromechanical brake, the third mounting hole and / or the fourth mounting hole are located on the outer flange at the outer end of the housing of the brake body.

[0013] Optionally, in the embodiment of the electromechanical brake, the outer end of the first guide pin and / or the outer end of the second guide pin are wrapped by a sealing sleeve connected to the first channel and / or the second channel.

[0014] Optionally, in the embodiment of the electromechanical brake, the inner end of the first guide pin has a first threaded hole, and the first guide pin is installed on the brake body by a first bolt passing through the first mounting hole and received by the first threaded hole.

[0015] Optionally, in the embodiment of the electromechanical brake, the inner end of the second guide pin has a second threaded hole, and the second guide pin is installed on the brake body by a second bolt passing through the second mounting hole and received by the second threaded hole.

[0016] Optionally, in the embodiment of the electromechanical brake, the first guide pin has a first flange that abuts against the outside of the first mounting hole. The inner end of the first guide pin passes through the first mounting hole, and the inner end of the first mounting hole has a first external thread. A first nut is installed on the first external thread of the first guide pin and abuts against the inside of the first mounting hole.

[0017] Optionally, in the embodiment of the electromechanical brake, the second guide pin has a second flange that abuts against the outer side of the second mounting hole. The second guide pin has an inner end that passes through the second mounting hole. The inner end of the second mounting hole has a second external thread, and a second nut is mounted to the second external thread of the second guide pin and abuts against the inner side of the second mounting hole.

[0018] Optionally, in the embodiment of the electromechanical brake, the first mounting hole and the second mounting hole are axially offset.

[0019] Optionally, in the embodiment of the electromechanical brake, the first mounting hole has an axial length greater than that of the second mounting hole.

[0020] Optionally, in the embodiment of the electromechanical brake, the first mounting hole is axially more inward than the second mounting hole.

[0021] Optionally, in the embodiment of the electromechanical brake, the brake body includes a housing, a main module connected to the housing, and a motor and an electronic control unit connected to the main module.

[0022] Optionally, in the embodiment of the electromechanical brake, the first mounting hole and the second mounting hole are provided on inner flanges on both sides of the inner end of the housing. The main module includes an acting end acting on the first friction plate, and the housing includes an outer end portion acting on the second friction plate.

[0023] Optionally, in the embodiment of the electromechanical brake, the housing is composed of a first housing portion and a second housing portion assembled axially. The first housing portion defines the first mounting hole and the second mounting hole and is connected to the main module. The second housing portion includes an outer end portion acting on the second friction plate.

[0024] Optionally, in the embodiment of the electromechanical brake, at least one of the outer end and the inner end of the first guide pin has an external thread to engage with the internal thread of the corresponding mounting hole, and at least one of the outer end and the inner end of the first guide pin has a torque application portion.

[0025] Optionally, in the embodiment of the electromechanical brake, at least one of the outer end and the inner end of the second guide pin has an external thread to engage with the internal thread of the corresponding mounting hole, and at least one of the outer end and the inner end of the second guide pin has a torque application portion.

[0026] In the electromechanical brake according to the embodiment, the connection between the friction plate bracket and the brake body is more stable. Description of the Drawings

[0027] Referring to the accompanying drawings, the disclosure of the present application will become more readily understood. It is readily understood by those skilled in the art that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present application. In addition, similar numbers in the figures are used to represent similar components, where:

[0028] Figure 1 shows an exploded view of an electromechanical brake assembled to a wheel hub according to an embodiment;

[0029] Figure 2 shows a perspective view of an electromechanical brake according to an embodiment;

[0030] Figure 3 shows a longitudinal sectional view of a first guide pin of the electromechanical brake in Figure 2 ;

[0031] Figure 4 shows a cross-sectional view of two guide pins of the electromechanical brake in Figure 2 ;

[0032] Figure 5 and Figure 6 show a perspective view and a cross-sectional view of an electromechanical brake according to another embodiment, respectively;

[0033] Figure 7 shows a cross-sectional view of an electromechanical brake according to another embodiment;

[0034] Figure 8 shows a cross-sectional view of an electromechanical brake according to another embodiment;

[0035] Figure 9 shows a cross-sectional view of an electromechanical brake according to another embodiment;

[0036] Figure 10 shows a cross-sectional view of an electromechanical brake according to another embodiment;

[0037] Figure 11 shows a perspective view of an electromechanical brake according to another embodiment;

[0038] Figure 12 shows a Figure 11 cross-sectional view of the electromechanical brake in

[0039] Figure 13 shows a perspective view of a friction plate bracket according to an embodiment;

[0040] Figure 14 shows a perspective view of an electromechanical brake according to another embodiment;

[0041] Figure 15 shows Figure 14 an exploded view of an electromechanical brake in

[0042] Figure 16 shows Figure 14 an end view of an electromechanical brake in

[0043] Figure 17 and Figure 18 respectively show Figure 16 cross-sectional views of the A-A section and the B-B section in

[0044] Figure 19 a cross-sectional view of an electromechanical brake according to another embodiment;

[0045] Figure 20 a cross-sectional view of an electromechanical brake according to another embodiment;

[0046] Figure 21 a cross-sectional view of an electromechanical brake according to another embodiment; and

[0047] Figure 22 a cross-sectional view of an electromechanical brake according to another embodiment. DETAILED DESCRIPTION

[0048] Figure 1 shows an installation view of an electromechanical brake, in which a rotating shaft 91, a shock absorber 92, a bearing 94, a knuckle arm 93, a brake disc 95 and a wheel 96 are shown, and an electromechanical brake 100 according to an embodiment, which is driven by a motor to provide a braking force by clamping the brake disc 95 with a brake caliper. When assembled, the electromechanical brake 100 is installed on the knuckle arm 93, and at the same time, the electromechanical brake 100 is accommodated in a compact space inside the hub of the wheel 96.

[0049] Refer to Figures 2 to 4 , in which an electromechanical brake is shown. The electromechanical brake mainly includes a friction plate bracket 1 and a brake body 2. The friction plate bracket 1 is mounted to a position near the vehicle wheel through a pair of through holes 10, such as fixed to the knuckle arm 93, so that the clamping opening 101 of the friction plate bracket 1 is aligned with the brake disc 95. Refer to Figure 13, which shows the specific structure of the friction plate bracket 1, which includes a bracket body and a first friction plate 71 and a second friction plate 72 that can slide axially on the bracket body. The first friction plate 71 and the second friction plate 72 are biased by a number of elastic members 89, and the space therebetween corresponds to the clamping opening 101. The first friction plate 71 and the second friction plate 72 are located on the axially opposite sides of the brake disc 95 and are actuated by the motor-based brake body 2 to clamp the brake disc 95, thereby achieving braking. The friction plate bracket 1 further includes a first channel 11 and a second channel 12 arranged axially on both sides of the first friction plate 71 and the second friction plate 72. The brake body is slidably mounted to the friction plate bracket 1 by means of the first channel 11 and the second channel 12.

[0050] More specifically, the brake body 2 includes a first mounting hole 211 and a second mounting hole 212. The first guide pin 31 and the second guide pin 41 are respectively mounted to the brake body 2 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. More specifically, the first guide pin 31 and the second guide pin 41 respectively include outer ends 311, 411 away from the brake body 2 and inner ends 312, 412 close to the brake body 2. In Figures 2 to 4 the illustrated embodiment, the inner ends 312, 412 of the first guide pin 31 and the second guide pin 41 have threaded holes, and the first bolt 31 and the second bolt 42 respectively pass through the first mounting hole 211 and the second mounting hole 212 of the brake body 2 and are received by the threaded holes of the corresponding inner ends 312, 412 of the first guide pin 31 and the second guide pin 41, thereby mounting the first guide pin 31 and the second guide pin 41 to the brake body 2. The first guide pin 31 and the second guide pin 41 can slide axially in the first channel 11 and the second channel 12, thereby enabling the brake body 2 to slide axially relative to the friction plate bracket 1.

[0051] In some embodiments, the brake body 2 mainly includes: a housing 21 that at least partially covers the friction plate bracket 1, a main module 23 connected to the housing 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 flanges 214 on both sides of the inner end of the housing 21. For the specific structure of the brake body 2, reference can be made to the Chinese patent application for invention with the publication number CN117267280A and the title "Electromechanical Brake", and the full text of this patent application is incorporated herein by reference.

[0052] For a more concise description, throughout the present application, the term "inner" refers to the end close to the main module 23 of the brake body 2 ( Figure 3 the right side inFigure 3 the left side in [figure reference], for example, for the first guide pin 31, the first channel 11, and the housing 21, its inner end is the end closer to the main module 23, and its outer end is the end farther from the main module 23. "Both sides" refers to the outer sides on both sides of the friction plate, that is, corresponding to Figure 4 above and below the first friction plate 71 and the second friction plate 72 in [figure reference]. "Axial direction" refers to the direction parallel to the first channel 11 or the guide pin 31.

[0053] Refer to Figure 4 to introduce the working mode of the electromechanical brake. During operation, when braking is required, the brake body 2 will cause the acting end, such as the plunger 25 ( Figure 15 visible in [figure reference]) to extend out to push the first friction plate 71 towards the brake disc 95 (corresponding to Figure 4 causing the first friction plate 71 to move leftward in [figure reference]). During this process, the brake body 2 does not undergo axial displacement. After the first friction plate 71 contacts the brake disc 95, since the brake disc 95 is fixed, the first friction plate 71 cannot move further leftward. At this time, further elongation of the plunger 25 will cause the entire brake body 2 to displace rightward, and the outer end 213 of the housing (for example, in the shape of a hook) will drive the second friction plate 72 to move rightward until the first friction plate 71 and the second friction plate 72 clamp the brake disc 95 to provide braking. During the above working process, since the friction plate bracket 1 is fixedly installed on the vehicle, the first channel 11 and the second channel 12 therein remain stationary, while the first guide pin 31 and the second guide pin 41 connected to the brake body 2 will move axially (rightward) together with the brake body 2. As Figure 3 shown, the center of gravity G of the brake body 2 is marked therein, which is located outside the supported friction plate bracket 1. The brake body 2 is actually suspended on the friction plate bracket 1 through the first guide pin 31 and the second guide pin 41. Therefore, the first bolt 32 and the second bolt 42 will be subjected to greater stress. In addition, the sizes of the first bolt 32 and the second bolt 42 are also limited by the thread hole sizes at the inner ends of the first guide pin 31 and the second guide pin 41. On the other hand, as the brake body 2 moves rightward, the center of gravity G will also move rightward, and the axial length of the contact section between the first guide pin 31 and the second guide pin 41 and the first channel 11 and the second channel 12 will decrease, resulting in an increase in the stress on the first guide pin 31 and the second guide pin 41.

[0054] Continue to refer to Figure 5 and Figure 6, which shows a modified electromechanical brake. In this modification, the outer ends of the first channel 11 and the second channel 12 are open, and the outer ends 311 of the first guide pin and the outer ends 411 of the second guide pin extend out of the first channel 11 and the second channel 12. In some embodiments, during the entire braking process, the outer ends 311 of the first guide pin and the outer ends 411 of the second guide pin remain outside the first channel 11 and the second channel 12. In some embodiments, the first guide pin 31 and the second guide pin 41 are configured such that during the braking process, when the brake body 2 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 and / or the second guide pin 41 and the second channel 12 remains unchanged, that is, the length of the contact section is equal to the entire length of the first channel 11 and the second channel 12. This can be achieved by appropriately setting the lengths of the first guide pin 31 and the second guide pin 41. In the illustrated embodiment, the outer ends 311 of the first guide pin and the outer ends 411 of the second guide pin are wrapped by a first seal sleeve 971 and a second seal sleeve 972 respectively connected to the first channel and the second channel. The first seal sleeve 971 includes a first connecting portion 976 that wraps the outer end of the first channel and a telescopic portion 975, and the second seal sleeve 972 includes a second connecting portion 974 that is embedded in the outer end of the second channel and a telescopic portion 975. The telescopic portion 975 can expand and contract with the movement of the guide pin when the guide pin moves axially. By extending the guide pin out of the first channel and the second channel, the stress on the guide pin during the entire braking process can be made stable and relatively small.

[0055] Continuing to refer to Figure 7 , which shows a modified electromechanical brake. In this modification, the outer end 311 of the first guide pin 31 is wrapped by an alternative first seal sleeve 9711, which does not have a telescopic portion. In addition, there is a certain gap between the seal sleeve and the outer end 311 of the first guide pin 31. Alternatively, the seal sleeve at the outer end of the second guide pin 41 can be set similarly.

[0056] Continuing to refer to Figure 8 , which shows a modified electromechanical brake. In this embodiment, only the outer end of the second channel is open, and the first channel 11 is still set to be closed, so that the outer end of the first guide pin 31 does not extend out of the first channel 11. Nevertheless, Figure 8 the arrangement can still relieve the shear stress to a certain extent. In an alternative embodiment, the outer end of the first channel 11 can also be set to be open, while the outer end of the second channel 12 is set to be closed.

[0057] Continuing to refer to Figure 9, which shows a modified electromechanical brake. In this embodiment, the second guide pin 41 includes a second flange 413, the second flange 413 abuts against the outer side of the second mounting hole 212, the inner end 412 of the second guide pin 41 passes through the second mounting hole 212, the inner end 412 of the second guide pin 41 has a second external thread 4121, the second mounting hole 212 has an internal thread, and the second guide pin 41 is joined to the second mounting hole 212 by the second external thread 4121 at its inner end. By passing the second guide pin 41 through the second mounting hole 212, the thread size used can be increased relative to Figures 2 to 4 the embodiment shown, thereby better resisting stress. For example, in some embodiments, the thread size can be increased from M10 to M12. It should be understood that when adopting Figure 9 the structure shown, during assembly, the inner end 412 of the second guide pin 41 is first screwed into the second mounting hole 212 of the brake body 2, the first guide pin 31 is inserted into the first channel 11, the second guide pin 41 is axially inserted into the first channel 11, and finally the brake body 2 is rotated as a whole around the second guide pin 41 so that the housing 21 covers the friction plate bracket 1 and the threaded hole at the inner end of the first guide pin is aligned with the first mounting hole, and finally the first bolt 32 is installed, thereby completing the assembly between the brake body 2 and the friction plate bracket 1.

[0058] Continuing to refer to Figure 10 , which shows a modified electromechanical brake. In this modification, the inner end 412 of the second guide pin 41 has a second external thread 4121, and the second mounting hole 212 has an internal thread. The outer end 411 of the second guide pin 41 has a torque application portion, more specifically, the torque application portion is configured as a groove at the outer end of the second guide pin 41, such as an internal hexagonal groove. With this structure, the assembly of the brake body 2 and the friction plate bracket 1 no longer requires rotation around the second guide pin, but after aligning the brake body 2 and the friction plate bracket 1, the inner end 412 of the second guide pin is respectively screwed into the second mounting hole 212 and the first bolt 32 is screwed into the threaded hole at the inner end of the first guide pin. In addition, a bushing 904 can be provided between the outer end of the second channel and the second guide pin 41, and the outer seal 905 is assembled to the outer end of the second channel after the second guide pin 41 is installed in place, and in this embodiment, it is sleeved on the outer end of the second channel, thereby covering the torque application portion. In an alternative embodiment, the first guide pin 31 can adopt the same structure as the second guide pin 41.

[0059] Continuing to refer to Figure 11 , Figure 12 and Figure 13, which shows a modified electromechanical brake. In this modification, the first guide pin 31 penetrates into the first mounting hole 211. In this embodiment, the first guide pin 31 has a first flange 313, the first flange 313 abuts against the outer side of the first mounting hole 211, the inner end 312 of the first guide pin 31 passes through the first mounting hole 211, the inner end 312 of the first guide pin 31 has a first external thread 3121, and the first nut 33 is mounted to the portion of the first external thread 3121 of the first guide pin and abuts against the inner side of the first mounting hole 211. By passing the first guide pin 31 through the first mounting hole 211 and being received by the first nut 33, the bolt size adopted can be increased relative to Figures 2 to 4 the embodiment shown, thereby better resisting stress. For example, in some embodiments, the bolt size can be increased from M10 to M12. In this embodiment, the inner end of the second guide pin 41 has a second threaded hole, and the second guide pin is mounted to the brake body, such as the inner flange 214 at the inner end of the housing 21, by a second bolt 42 passing through the second mounting hole 212 and being received by the second threaded hole.

[0060] In this embodiment, the first mounting hole 211 and the second mounting hole 212 can be axially offset. In this embodiment, the first mounting hole 211 is more inward, that is, closer to the main module 23 of the brake body 2. When assembling the brake body 2 and the friction plate bracket 1, the first guide pin 31 is fixed to the brake body 2 through the engagement of its inner end 312 with the first nut 33 and inserted into the first channel 11, the second guide pin 41 is inserted into the second channel, and then the brake body 2 is rotated relative to the friction plate bracket 1 along the axis where the first guide pin is located, so that the housing 21 covers the friction plate bracket 1, and the second bolt 42 is installed when the second mounting hole 212 is aligned with the second threaded hole of the second guide pin 41, thereby completing the assembly. In some embodiments, the first mounting hole 211 has an axial length greater than that of the second mounting hole 212, thereby providing a larger support area and reducing stress. In addition, in Figure 12 the embodiment, a sealing sleeve 99 and an additional sealing sleeve 98 are also provided, which are arranged between the guide pin and the corresponding channel to prevent dust from entering the channel and affecting the sliding. The sealing sleeve 99 and the additional sealing sleeve 98 can both have telescopic portions.

[0061] In addition, the outer ends of both the first channel 11 and the second channel 12 are open, and the outer ends 311, 411 of the first guide pin 31 and the second guide pin 32 pass through the first channel 11 and the second channel 12, so that when the brake body 2 axially slides relative to the friction plate bracket, the length of the contact section between the first guide pin 31 and the first channel 11 and / or the second guide pin 32 and the second channel 12 remains unchanged. Herein, the contact section is the entire length of the first channel 11 and the second channel 12. In other words, when the brake body 2 moves rightward, the outer ends of the first guide pin 31 and the second guide pin 32 will not enter the first channel and the second channel, resulting in the shortening of the contact section. This arrangement maximizes the contact surface between the guide pin and the channel, reducing the stress on the guide pin.

[0062] In addition, as Figure 13 can be seen, the bracket body of the friction plate bracket 1 includes an outer support portion 151, an inner support portion 152 spaced apart from the outer support portion 151, and left and right wing portions 153, 154 connecting the outer support portion 151 and the inner support portion 152 on both sides. The left and right wing portions 153, 154 respectively define the first channel 11 and the second channel 12.

[0063] In this embodiment, the outer ends 311, 411 of the first guide pin 31 and the second guide pin 41 are installed in the third mounting hole 216 and the fourth mounting hole 217 on the brake body. The third mounting hole 216 and the fourth mounting hole 217 are provided, for example, at the outer flange 215 extending from the outer end of the housing 21. An additional sealing sleeve 98 is provided between the first channel and the third mounting hole and between the second channel and the fourth mounting hole. The additional sealing sleeve 98 can also have a telescopic portion similar to the sealing sleeve 99. In this embodiment, a bushing 981 is provided between the inside of the third mounting hole 216 and the fourth mounting hole 217 and the corresponding guide pin, and the sealing sleeve 98 is connected between the bushing 981 and the corresponding channel opening. In this embodiment, the outer ends of the first guide pin 31 and the second guide pin 41 are configured as stud pins. In this embodiment, the assembly method of the friction plate bracket 1 and the brake body 2 includes a step of rotating around the first guide pin 31. By supporting the outer ends of the first guide pin 31 and the second guide pin 41, the support mode of the brake body 2 is changed from suspension to two-point support, further alleviating the stress on the guide pin.

[0064] Continue to refer to Figures 14 to 18, which shows a modified electromechanical brake. In this embodiment, the housing 21 includes a first housing part 201 and a second housing part 202 assembled axially. For example, the first housing part 201 and the second housing part 202 are assembled by a plurality of bolts 203 along the axis. In some embodiments, the first housing part 201 defines inner flanges 214 on both sides of the inner end, and the inner flanges 214 on both sides respectively include a first mounting hole 211 and a second mounting hole 212. The main module 23 of the brake body is connected to the first housing part 201, and the plunger 25 of the main module 23 acts on the first friction plate 71. In some embodiments, the second housing part 202 defines an outer end portion 213 acting on the second friction plate 72 at the outer end of the housing, and has outer flanges 215 at both sides of the outer end of the housing. A third mounting hole 216 and a fourth mounting hole 217 are respectively provided on the outer flanges 215 on both sides. The second housing part 202 is assembled with the first housing part 201 after the first guide pin and the second guide pin are respectively inserted into the first channel and the second channel. The specific assembly method includes, for example, installing the first guide pin 31 and the second guide pin 41 to the first housing part 201, sleeving the first channel and the second channel of the friction plate bracket 1 on the first guide pin 31 and the second guide pin 41, and finally assembling the second housing part 202 to the first housing part 201, including inserting the outer ends 311, 411 of the first guide pin 31 and the second guide pin 41 into the third mounting hole 216 and the fourth mounting hole 217, and installing a plurality of bolts 203. In this embodiment, the installation method of the first guide pin 31 and the second guide pin 41 is the same as that of the previous embodiment. By dividing the housing into two axially assembled parts, the assembly of the electromechanical brake is facilitated. The assembly process no longer involves rotation around the guide pins, and more possibilities of the form of the guide pins are provided.

[0065] Continue to refer to Figure 19 , which shows a modification to the previously shown electromechanical brake. In this embodiment, the inner end 412 of the second guide pin 41 has a torque application portion 4122 and an external thread 4121. In this embodiment, the torque application portion 4122 is in the form of a bolt head, and the bolt head may have an external hexagonal profile, an internal hexagonal, a cross or a slotted head, etc. to receive the torque applied by a specific tool. Correspondingly, the second mounting hole of the inner flange 214 of the housing may be provided with an internal thread, so that the second guide pin 41 can be installed by the engagement of its external thread 4121 with the internal thread of the mounting hole. With this arrangement, the second guide pin 41 is also configured to pass through the second mounting hole, relieving the stress on the second guide pin 41. In some embodiments, the external thread of the second guide pin 41 may also be provided at the outer end 411, and correspondingly the fourth mounting hole is provided with an internal thread.

[0066] Continue to refer to Figure 20, which shows a modification to the previously shown electromechanical brake. In this embodiment, the inner end 312 of the first guide pin 31 has a torque application portion 3122 and an external thread 3121. In this embodiment, the torque application portion 3122 is in the form of a bolt head, and the bolt head may have an external hexagonal profile, an internal hexagonal shape, a cross or a slotted screwdriver head, etc. to receive the torque applied by a specific tool. The first mounting hole of the inner flange 214 of the housing may be provided with an internal thread such that the first guide pin 31 can be installed by the engagement of its external thread 3121 with the internal thread of the first mounting hole. In some embodiments, the external thread of the first guide pin 31 may also be provided at the outer end 311, and correspondingly, the third mounting hole is provided with an internal thread.

[0067] Continuing to refer to Figure 21 , which shows a modification to the previously shown electromechanical brake. In this embodiment, the outer end 411 of the second guide pin 41 has an external thread 4111, and the inner end 412 of the second guide pin 41 has a torque application portion, which is in the form of an internal hexagonal notch in this embodiment. Alternatively, the torque application portion may take any other form suitable for receiving torque. In addition, in Figure 21 the embodiment, the bushing 981 is installed in the second mounting hole, and the seal sleeve 99 is connected between the bushing 98 and the inner end of the second channel.

[0068] Continuing to refer to Figure 22 , which shows a modification to the previously shown electromechanical brake. In this embodiment, the outer end 411 of the second guide pin 41 has a torque application portion, and the inner end 412 of the second guide pin 41 has an external thread 4121 to engage with the internal thread of the second mounting hole. In addition, the outer end 311 of the first guide pin 31 has a torque application portion, and the inner end 312 of the first guide pin 31 has an external thread 3121, which engages with the internal thread of the first mounting hole. In this embodiment, both the first guide pin 31 and the second guide pin 41 are inserted and installed from the left side to the right side in the figure.

[0069] The electromechanical brake according to each embodiment effectively relieves the stress on the guide pin or bolt, avoiding failures such as breakage of the guide pin or bolt and related safety hazards.

[0070] The specific embodiments described above in this application are only for more clearly describing the principle of this application, where each component is clearly shown or described to make the principle of the present invention easier to understand. Without departing from the scope of this application, those skilled in the art can easily make various modifications or changes to this application. Therefore, it should be understood that these modifications or changes should all be included within the scope of the patent protection of this application.

Claims

1. An electromechanical brake, characterized in that: include: A friction plate bracket (1), wherein a first friction plate (71) and a second friction plate (72) are arranged 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) comprises 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 brake body (2), the brake body (2) 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 brake body (2) 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 bracket (1); Wherein, the outer ends of the first channel (11) and / or the second channel (12) are open, and the outer ends (311) of the first guide pin and / or the outer ends (411) of the second guide pin extend out of the first channel (11) and / or the second channel (12).

2. The electromechanical brake according to claim 1, characterized in that The first guide pin (31) and / or the second guide pin (41) are configured so that during braking, when the brake body (2) 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) and / or the second guide pin (41) and the second channel (12) remains unchanged.

3. The electromechanical brake according to claim 1, characterized in that The outer end (311) of the first guide pin and / or the outer end (411) of the second guide pin are installed into the third mounting hole (216) and / or the fourth mounting hole (217) on the brake body, wherein the third mounting hole (216) and / or the fourth mounting hole (217) are located on the outer flange (215) of the outer end of the cover (21) of the brake body (2).

4. The electromechanical brake according to claim 1, characterized in that The outer end (311) of the first guide pin and / or the outer end (411) of the second guide pin is wrapped by a sealing sleeve connected to the first channel and / or the second channel.

5. The electromechanical brake according to any one of claims 1 to 4, characterized in that: The inner end (312) of the first guide pin (31) has a first threaded hole, and the first guide pin (31) is mounted to the brake body by a first bolt (32) passing through the first mounting hole (211) and received by the first threaded hole; and / or The inner end (412) of the second guide pin (41) has a second threaded hole, and the second guide pin (41) is mounted to the brake body by a second bolt (42) passing through the second mounting hole (212) and received by the second threaded hole.

6. The electromechanical brake according to any one of claims 1 to 4, characterized in that: The first guide pin (31) has a first flange (313), the first flange (313) abuts against the outer side of the first mounting hole (211), the first guide pin (31) has an inner end (312) passing through the first mounting hole, the inner end (312) of the first mounting hole has a first external thread (3121), and the first nut (33) is mounted to the first external thread (3121) of the first guide pin and abuts against the inner side of the first mounting hole (211); and / or The second guide pin (41) has a second flange, the second flange abuts against the outer side of the second mounting hole (212), the second guide pin (41) has an inner end passing through the second mounting hole, the inner end of the second mounting hole has a second external thread, and the second nut is mounted to the second external thread of the second guide pin and abuts against the inner side of the second mounting hole (212).

7. The electromechanical brake according to any one of claims 1 to 4, characterized in that: The first mounting hole (211) and the second mounting hole (212) are axially offset, wherein the first mounting hole (211) has an axial length greater than that of the second mounting hole (212), and wherein the first mounting hole (211) is axially more inward than the second mounting hole (212).

8. The electromechanical brake according to any one of claims 1 to 4, characterized in that: The brake body (2) includes a cover shell (21), a main module (23) connected to the cover shell (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 inner flanges (214) on both sides of the inner end of the cover shell, the main module (23) includes an action end (25) acting on the first friction plate (71), and the cover shell (21) includes an outer end (213) acting on the second friction plate (72).

9. The electromechanical brake according to claim 8, characterized in that The cover shell (21) is composed of a first cover shell part (201) and a second cover shell part (202) assembled along the axial direction, the first cover shell part (201) defines the first mounting hole (211) and the second mounting hole (212) and is connected to the main module (23), and the second cover shell part (202) includes an outer end part (213) acting on the second friction plate.

10. The electromechanical brake according to any one of claims 1 to 4, characterized in that: At least one of the outer end (311) and the inner end (312) of the first guide pin (31) has an external thread to engage with the internal thread of the corresponding mounting hole, and at least one of the outer end (311) and the inner end (312) of the first guide pin (31) has a torque application portion, and / or at least one of the outer end (411) and the inner end (412) of the second guide pin (41) has an external thread to engage with the internal thread of the corresponding mounting hole, and at least one of the outer end (411) and the inner end (412) of the second guide pin (41) has a torque application portion.

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