Electromechanical brake device and vehicle

Abstract

The application relates to the technical field of vehicle brake-by-wire, in particular to an electronic mechanical brake device and a vehicle. The electronic mechanical brake device comprises a support, a caliper body, a driving mechanism, an inner brake pad and an outer brake pad. The caliper body is slidably connected with the support along a first direction. The caliper body has a first part and a second part arranged oppositely. The first part is provided with a containing cavity, and the second part is provided with a first opening which is arranged oppositely to the containing cavity. The driving mechanism is arranged on the first part, and part of the driving mechanism is contained in the containing cavity. The inner brake pad and the outer brake pad are arranged oppositely and spaced apart along the first direction, and are adapted to move towards each other under the driving of the driving mechanism. The electronic mechanical brake device further comprises a pressing block which is fixed to the caliper body and arranged at least partially in the first opening. The outer brake pad is fixed to the pressing block, and the outer brake pad and the pressing block are in abutment along the first direction. The electronic mechanical brake device can make the force on the brake pad uniform and reduce the eccentric wear of the brake pad.

Description

Technical Field

[0001] This application relates to the field of vehicle brake-by-wire technology, and in particular to an electromechanical braking device and a vehicle. Background Technology

[0002] Currently, vehicles with large loads require electromechanical braking devices with high clamping force. These devices require brake pads with a large braking area. However, because the caliper body has openings on its surface during manufacturing, no force is applied to the brake pads at these openings, resulting in uneven pressure distribution on the brake pads and causing uneven wear. Utility Model Content

[0003] This application provides an electromechanical braking device and vehicle that can make the brake pads bear force evenly and reduce uneven wear of the brake pads.

[0004] To achieve the above objectives, the main technical solutions adopted in this application include:

[0005] In a first aspect, embodiments of this application provide an electromechanical braking device, including a bracket, a clamp body, a drive mechanism, an inner brake pad, and an outer brake pad. Along a first direction, the clamp body is slidably connected to the bracket. The clamp body has a first part and a second part disposed opposite to each other. The first part has a receiving cavity, and the second part has a first opening. Along the first direction, the first opening is disposed opposite to the receiving cavity. The drive mechanism is disposed in the first part, and a portion of the drive mechanism is received in the receiving cavity. Along the first direction, the inner brake pad and the outer brake pad are disposed opposite to each other and spaced apart. The inner brake pad and the outer brake pad are adapted to move toward each other under the drive of the drive mechanism. The electromechanical braking device further includes a pressure block, which is fixed to the clamp body and at least partially disposed within the first opening. The outer brake pad is fixed to the pressure block, and along the first direction, the outer brake pad abuts against the pressure block.

[0006] The electromechanical braking device proposed in this application embodiment has a pressure block on the second part, and part of the pressure block is located in the first opening. When the drive mechanism drives the inner brake pad and the outer brake pad to clamp the brake disc, the caliper slides relative to the bracket, and at the same time drives the pressure block to press against the outer brake pad. At this time, the second part and the pressure block press against the outer brake pad at the same time, thereby increasing the force-bearing area of ​​the outer brake pad, making the surface of the outer brake pad uniformly stressed, thereby reducing the uneven wear of the outer brake pad.

[0007] Optionally, the pressure block has a first side surface, and the outer brake pad has a second side surface, with the first side surface and the second side surface facing each other and engaging in abutment along the first direction.

[0008] In the above embodiment, the first side of the pressure block and the second side of the outer brake pad are in face-to-face contact. When the caliper body drives the pressure block and the outer brake pad to press against the brake disc, the pressure block and the caliper body simultaneously apply force to the second side of the outer brake pad, which increases the force-bearing area of ​​the outer brake pad and makes the force distribution on the outer brake pad uniform, reducing the probability of uneven wear of the outer brake pad.

[0009] Optionally, the second part has a third side surface, which is disposed opposite to and abuts against the second side surface along the first direction.

[0010] In the above embodiment, when the caliper body drives the pressure block and the outer brake pad to press against the brake disc, the first side and the third side simultaneously press against the second side, which increases the force-bearing area of ​​the outer brake pad and makes the force distribution on the outer brake pad uniform, reducing the probability of uneven wear of the outer brake pad.

[0011] Optionally, the pressure block is provided with a mounting groove, which extends through the first side along the first direction, and a mounting post is provided on the second side, wherein the mounting post is interference-fitted with the mounting groove.

[0012] In the above embodiment, the mounting groove extends from the first side toward the interior of the pressure block to accommodate the mounting post, thereby fixing the pressure block and the outer brake pad, so that the second side of the outer brake pad is in close contact with the first side of the pressure block, and the force on the outer brake pad is uniform.

[0013] Optionally, the bracket is provided with a first guide rail, and the inner brake pad is provided with a first slider. The first slider is slidably engaged with the first guide rail so that the inner brake pad moves relative to the bracket in a first direction.

[0014] In the above embodiments, the first guide rail provides guidance for the sliding of the inner brake pad toward or away from the brake disc, so as to uniformly distribute the braking force of the inner brake pad on the brake disc and improve the stability of the braking force.

[0015] Optionally, the drive mechanism includes a driver and a housing, the driver being disposed within the housing, and the inner brake pad and the outer brake pad being adapted to move toward each other under the drive of the driver; along the vertical direction, the housing has two spaced-apart first mounting holes, and the first part has two spaced-apart second mounting holes, with the two first mounting holes corresponding one-to-one with the two second mounting holes; the electromechanical braking device further includes two fasteners, each of the fasteners passing through a corresponding first mounting hole and a corresponding second mounting hole.

[0016] In the above embodiment, the two second mounting holes are symmetrically arranged in the vertical direction, so that the clamp body structure of the left wheel and the right wheel is the same. Only the installation direction of the clamp body needs to be changed, and the two fasteners are passed through the corresponding first mounting hole and the corresponding second mounting hole respectively to fix the housing and the clamp body. This reduces the identification of left and right parts when installing the clamp body, and the installation of the drive mechanism only requires changing the installation direction, thus improving the assembly efficiency.

[0017] Optionally, the drive mechanism further includes a transmission component, which is configured as a ball screw. The ball screw includes a screw and a nut. The screw is connected to the drive end of the driver. The nut cooperates with the screw. The nut is movably disposed in the clamp body and selectively abuts against the inner brake pad.

[0018] In the above embodiment, when the driver drives the lead screw to rotate, the lead screw drives the nut to move toward the inner brake pad. When the nut abuts against the inner brake pad, it drives the inner brake pad to move toward the brake disc so that the inner brake pad presses against the brake disc.

[0019] Optionally, the lead screw includes a first section and a second section connected together. The first section is connected to the drive end of the driver, and the second section is engaged with the nut. The outer diameter of the first section is smaller than the outer diameter of the second section to form a first stepped surface. The electromechanical braking device also includes a force sensor, a first washer, a bearing, and a second washer. Along the first direction, the force sensor, the first washer, the bearing, and the second washer are sequentially disposed between the clamp body and the first stepped surface.

[0020] In the above embodiment, when the inner brake pad presses against the brake disc, the brake disc generates a reaction force on the inner brake pad. The inner brake pad transmits the reaction force to the lead screw, which moves away from the inner brake pad. The lead screw transmits the force through the first step surface to the force sensor, the first shim, the bearing, and the second shim, thereby transmitting the reaction force to the caliper body. This causes the first part of the caliper body to move away from the inner brake pad relative to the bracket. During the movement, the second part of the caliper body drives the pressure block and the outer brake pad to move closer to the brake disc, thereby causing the inner brake pad and the outer brake pad to clamp the brake disc together, achieving braking.

[0021] Optionally, the first stepped surface is constructed as an arc surface, and along the radial direction of the lead screw, the arc surface has an inner peripheral edge and an outer peripheral edge, and along the first direction, the inner peripheral edge is farther away from the inner brake pad than the outer peripheral edge.

[0022] In the above embodiments, the first step surface is constructed as an arc surface, which can evenly distribute the force of the lead screw to the clamp body, reduce the impact of the change in the angle of the receiving cavity on the measurement accuracy of the force sensor after the clamp body is deformed, and improve the stability of the braking pressure of the electronic braking device.

[0023] Secondly, embodiments of this application provide a vehicle including the electromechanical braking device described in any of the above embodiments.

[0024] The vehicle in this embodiment includes the electromechanical braking device described in any of the above embodiments, and has the beneficial effects of the electromechanical braking device described in any of the above embodiments. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a cross-sectional view of the electromechanical braking device in an embodiment of this application;

[0027] Figure 2 This is an exploded view of the electromechanical braking device in the embodiments of this application;

[0028] Figure 3 This is a schematic diagram of the structure of the pressure block in the embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the electromechanical braking device in the embodiments of this application;

[0030] Figure 5 This is a schematic diagram of the electromechanical braking device in the embodiments of this application.

[0031] [Explanation of Labels in the Attached Image]

[0032] 1. Bracket; 11. First guide rail;

[0033] 2. Clamp body; 21. First part; 210. Receiving cavity; 211. Second mounting hole; 22. Second part; 220. First opening; 221. Third side;

[0034] 3. Drive mechanism; 31. Driver; 32. Housing; 321. First mounting hole; 33. Transmission component; 331. Lead screw; 3311. First section; 3312. Second section; 3313. First stepped surface; 332. Nut;

[0035] 4. Inner brake pad; 41. First slider;

[0036] 5. External brake pad; 51. Second side; 52. Mounting post;

[0037] 6. Pressure block; 61. First side surface; 62. Mounting groove;

[0038] 71. Force sensor; 72. First gasket; 73. Bearing; 74. Second gasket;

[0039] 8. Fasteners; 9. Pins; a. Brake disc;

[0040] X, first direction; Y, up and down direction; Z, second direction. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0043] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0046] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0047] Electro-mechanical brakes (EMBs) use a motor, reduction gear, and mechanical transmission mechanism to drive the caliper for braking. EMBs are characterized by their simple structure, rapid response, smooth load transfer, and lack of hydraulic lines, resulting in high transmission efficiency. EMBs can improve vehicle safety, handling, and comfort.

[0048] The clamp body is the main load-bearing component of the electromechanical device. Its complex structure demands high strength and precision. The clamp body houses mechanical transmission mechanisms, drive structures, and other components. Machining the receiving cavity on one side of the clamp body to mate with the transmission mechanism is challenging, necessitating a corresponding opening on the other side. Furthermore, the other side of the clamp body also needs to connect to the brake pads. Moreover, vehicles with large loads require electromechanical braking devices with high clamping forces. These devices require brake pads with large braking areas. However, because the clamp body has openings on its surface, no force is applied to the brake pads at these openings. This results in a small area of ​​pressure on the brake pads and uneven pressure distribution, leading to uneven wear.

[0049] In addition, the clamp structure of the electromechanical braking device currently adapted to the left and right wheels is different. During the production and clamp assembly process, the clamp needs to be identified in order to be adapted to the corresponding wheel, resulting in low production and assembly efficiency.

[0050] In view of this, this application provides an electromechanical braking device that can increase the force-bearing area of ​​the outer brake pad, making the force on the outer brake pad uniform, thereby reducing the uneven wear phenomenon of the outer brake disc a. In addition, the clamp structure of the electromechanical braking device in this application does not require differentiation between left and right parts, which improves consistency in production and improves assembly efficiency during clamp assembly.

[0051] Firstly, reference Figure 1 and Figure 2This application provides an electromechanical braking device, which includes a bracket 1, a clamp body 2, a drive mechanism 3, an inner brake pad 4, and an outer brake pad 5. Along the first direction X, the clamp body 2 is slidably connected to the bracket 1. The clamp body 2 has a first part 21 and a second part 22 arranged opposite to each other. The first part 21 is provided with a receiving cavity 210, and the second part 22 is provided with a first opening 220. Along the first direction X, the first opening 220 is arranged opposite to the receiving cavity 210. The drive mechanism 3 is disposed in the first part 21, and a portion of the drive mechanism 3 is received in the receiving cavity 210. Along the first direction X, the inner brake pad 4 and the outer brake pad 5 are arranged opposite to each other and spaced apart. The inner brake pad 4 and the outer brake pad 5 are adapted to move toward each other under the drive of the drive mechanism 3. The electromechanical braking device also includes a pressure block 6, which is fixed to the clamp body 2 and at least partially disposed in the first opening 220. The outer brake pad 5 is fixed to the pressure block 6, and along the first direction X, the outer brake pad 5 abuts against the pressure block 6.

[0052] In this application, the inner brake pad 4 is the brake pad that acts on the inner friction surface of the brake disc a, i.e., the inner side of the vehicle chassis, and is not visible when the vehicle is off the production line. The outer brake pad is the brake pad that acts on the outer friction surface of the brake disc a, i.e., the outer side of the brake disc a (inner side of the wheel hub). If the vehicle is equipped with a non-enclosed wheel hub, its condition can be observed from the outside when the vehicle is off the production line.

[0053] The inner brake pad 4 and the outer brake pad 5 are spaced apart to define the space for accommodating the brake disc a. The brake disc a is located between the inner brake pad 4 and the outer brake pad 5. The drive structure drives the inner brake pad 4 and the outer brake pad 5 to move toward the brake disc a to clamp the brake disc a, thereby achieving the braking effect.

[0054] The receiving cavity 210 is used to house the part of the drive mechanism 3. When the receiving cavity 210 is machined in the first part 21 of the clamp body 2, it needs to be machined in the second part 22 at the same time to complete the machining of the receiving cavity 210. Therefore, the second part 22 will form a first opening 220. Since the outer brake pad 5 is located on one side of the second part 22, when the drive mechanism 3 drives the inner brake pad 4 and the outer brake pad 5 to clamp the brake disc a, the presence of the first opening 220 causes uneven force on the outer brake pad 5, which is prone to uneven wear.

[0055] Therefore, in this application, a pressure block 6 is provided on the second part 22. Part of the pressure block 6 is located inside the first opening 220. When the drive mechanism 3 drives the inner brake pad 4 and the outer brake pad 5 to clamp the brake disc a, the clamp body 2 slides relative to the bracket 1, and at the same time drives the pressure block 6 to press against the outer brake pad 5. At this time, the second part 22 and the pressure block 6 press against the outer brake pad 5 at the same time, thereby increasing the force-bearing area of ​​the outer brake pad 5, making the surface of the outer brake pad 5 uniformly stressed, thereby reducing the uneven wear of the outer brake pad 5.

[0056] The first direction X can be the rotation axis of the drive end of the drive mechanism 3, or the rotation axis of the wheel.

[0057] In one specific embodiment, the inner brake pad 4 is located on the side close to the first part 21, and the driving end of the driving mechanism 3 abuts against the inner brake pad 4. The outer brake pad 5 is located on the second part 22 and fixed to the pressure block 6. When the driving mechanism 3 drives the inner brake pad 4 to move toward the brake disc a until the inner brake pad 4 presses against the brake disc a, the brake disc a generates a reaction force on the inner brake pad 4. The inner brake pad 4 transmits the reaction force to the caliper body 2, thereby causing the first part 21 of the caliper body 2 to move away from the inner brake pad 4 relative to the bracket 1. During the movement of the caliper body 2, the second part 22 drives the pressure block 6 and the outer brake pad 5 to move toward the brake disc a, thereby causing the inner brake pad 4 and the outer brake pad 5 to clamp the brake disc a together, thus achieving braking.

[0058] Specifically, part of the pressure block 6 is located inside the first opening 220, and the other part of the pressure block is fixedly connected to the clamp body 2.

[0059] Optionally, refer to Figures 1 to 3 The reference figure shows that the pressure block 6 has a first side 61 and the outer brake pad 5 has a second side 51. Along the first direction X, the first side 61 and the second side 51 are opposite to and abut against each other.

[0060] The first side 61 of the pressure block 6 and the second side 51 of the outer brake pad 5 are in surface contact. When the caliper 2 drives the pressure block 6 and the outer brake pad 5 to press against the brake disc a, the second part 22 of the caliper 2 applies force to the outer brake pad 5. At the same time, the pressure block 6 applies force to the second side 51 of the outer brake pad 5 through the first side 61. This increases the force-bearing area of ​​the outer brake pad 5 and makes the force distribution on the outer brake pad 5 uniform, reducing the probability of uneven wear on the outer brake pad 5.

[0061] It should be noted that both the first side 61 and the second side 51 are perpendicular to the first direction X, so that the force exerted by the pressure block 6 on the external brake pad 5 is perpendicular to the brake pad, thereby improving the stability of the brake disc a under force.

[0062] Optionally, refer to Figure 2 The second part 22 has a third side 221 along the first direction X, and the third side 221 is disposed opposite to and abuts against the second side 51.

[0063] The second part 22 has a third side 221 facing the outer brake pad 5. A first opening 220 passes through the third side 221. The pressure block 6 passes through the first opening 220 and is along the first direction X. The first side 61 is flush with the third side 221. The first side 61 and the third side 221 simultaneously press against the second side 51, which increases the force-bearing area of ​​the outer brake pad 5 and makes the force distribution on the outer brake pad 5 uniform, reducing the probability of uneven wear of the outer brake pad 5.

[0064] Optionally, refer to Figure 1 and Figure 3 The pressure block 6 is provided with a mounting groove 62. Along the first direction X, the mounting groove 62 passes through the first side 61. The second side 51 is provided with a mounting post 52. The mounting post 52 is interference-fitted with the mounting groove 62.

[0065] The mounting groove 62 extends from the first side 61 toward the interior of the pressure block 6 to accommodate the mounting post 52, thereby fixing the pressure block 6 and the outer brake pad 5, so that the second side 51 of the outer brake pad 5 is in close contact with the first side 61 of the pressure block 6, and the force on the outer brake pad 5 is uniform.

[0066] It should be noted that there can be multiple mounting slots 62, and there can also be multiple mounting posts 52 on the second side 51, with each mounting slot 62 and mounting post 52 corresponding one-to-one. The mounting slot 62 can be a countersunk hole that does not penetrate the pressure block 6 along the first direction X, or it can be a through hole that penetrates the pressure block 6 along the first direction X.

[0067] Optionally, refer to Figure 1 and Figure 2 The bracket 1 is provided with a first guide rail 11, and the inner brake pad 4 is provided with a first slider 41. The first slider 41 slides with the first guide rail 11 so that the inner brake pad 4 moves relative to the bracket 1 in the first direction X.

[0068] The bracket 1 is provided with a first guide rail 11 extending along the first direction X. The inner brake pad 4 has a first slider 41, which is accommodated in the first guide rail 11 and can slide relative to the first guide rail 11 along the first direction X, thereby clamping or releasing the brake disc a. The first guide rail 11 provides guidance for the sliding of the inner brake pad 4 toward or away from the brake disc a, so that the braking force of the inner brake pad 4 on the brake disc a is evenly distributed and the stability of the braking force is improved.

[0069] Optionally, refer to Figure 1 , Figure 4 and Figure 5The drive mechanism 3 includes a driver 31 and a housing 32. The driver 31 is disposed within the housing 32. The inner brake pad 4 and the outer brake pad 5 are adapted to move toward each other under the drive of the driver 31. Along the vertical direction Y, the housing 32 has two spaced-apart first mounting holes 321, and the first part 21 has two spaced-apart second mounting holes 211. The two first mounting holes 321 and the two second mounting holes 211 correspond one-to-one. The electromechanical braking device also includes two fasteners 8, each fastener 8 passing through a corresponding first mounting hole 321 and a corresponding second mounting hole 211. The vertical direction Y refers to the vertical direction of the vehicle, which is perpendicular to the first direction X.

[0070] The two first mounting holes 321 on the housing 32 are arranged along the vertical direction Y, and the two second mounting holes 211 on the first part 21 are arranged along the vertical direction Y. The two second mounting holes 211 are symmetrically arranged in the vertical direction Y, so that the clamp body 2 of the left wheel and the right wheel have the same structure. Only the installation direction of the clamp body 2 needs to be changed, and then the first mounting holes 321 on the housing 32 are aligned with the second mounting holes 211 on the first part 21. The two fasteners 8 are passed through the corresponding first mounting holes 321 and the corresponding second mounting holes 211 respectively to fix the housing 32 and the clamp body 2. This reduces the identification of left and right parts when installing the clamp body 2, and the installation of the drive mechanism 3 only requires changing the installation direction, which improves the assembly efficiency.

[0071] Optionally, refer to Figure 1 The drive mechanism 3 also includes a transmission component 33, which is constructed as a ball screw. The ball screw includes a screw 331 and a nut 332. The screw 331 is connected to the drive end of the driver 31. The nut 332 cooperates with the screw 331. The nut 332 is movably disposed in the clamp body 2 and selectively abuts against the inner brake pad 4.

[0072] The inner brake pad 4 is located on the side close to the first part 21, and the outer brake pad 5 is located on the second part 22 and fixed to the pressure block 6. When the driver 31 drives the lead screw 331 to rotate, the lead screw 331 drives the nut 332 to move toward the inner brake pad 4. When the nut 332 abuts against the inner brake pad 4, it drives the inner brake pad 4 to move toward the brake disc a, so that the inner brake pad 4 presses against the brake disc a. When the inner brake pad 4 presses against the brake disc a, the brake disc a generates a reaction force on the inner brake pad 4. The inner brake pad 4 transmits the reaction force to the lead screw 331, and the lead screw 331 then transmits the reaction force to the clamp body 2, so that the first part 21 of the clamp body 2 moves away from the inner brake pad 4 relative to the bracket 1. During the movement, the second part 22 of the clamp body 2 drives the pressure block 6 and the outer brake pad 5 to move toward the brake disc a, so that the inner brake pad 4 and the outer brake pad 5 clamp the brake disc a together, thereby achieving braking.

[0073] It should be understood that since the lead screw 331 is fixedly connected to the driver 31, and the driver 31 is connected to the caliper body through the housing 32, the lead screw 331 and the caliper body 2 can be regarded as an integral structure. When the inner brake pad 4 presses against the brake disc a, the brake disc a generates a reaction force on the inner brake pad 4. The reaction force pushes the lead screw 331, the driver 32 and the caliper body 2 to move, and at the same time drives the pressure block 6 and the outer brake pad 5 to move toward the brake disc a.

[0074] For example, the lead screw 331 is provided with a helical groove, and the nut 332 is provided with a helical groove. The nut 332 is sleeved on the lead screw 331, and the balls are filled between the lead screw 331 and the nut 332. When the lead screw 331 is driven to rotate, the balls roll along the helical groove between the lead screw 331 and the nut 332, thereby driving the nut 332 to move linearly along the axial direction of the lead screw 331.

[0075] The nut 332 includes a connecting peripheral wall and a bottom wall. The peripheral wall is provided with balls, and the peripheral wall of the nut 332 rolls with the lead screw 331 through the balls. The bottom wall selectively abuts against the inner brake pad 4. When the bottom wall of the nut 332 abuts against the inner brake pad 4, the nut 332 transmits the driving force of the driver 31 to the inner brake pad 4, increasing the force-bearing area of ​​the inner brake pad 4 and making the force on the inner brake pad 4 uniform.

[0076] The first part 21 has a first through hole on the side away from the second part 22. The first through hole communicates with the receiving cavity 210. The driving end of the driver 31 passes through the first through hole and is connected to the transmission mechanism.

[0077] Optionally, refer to Figure 1 The lead screw 331 includes a first section 3311 and a second section 3312 connected together. The first section 3311 is connected to the drive end of the driver 31, and the second section 3312 is engaged with the nut 332. The outer diameter of the first section 3311 is smaller than the outer diameter of the second section 3312 to form a first stepped surface 3313. The electromechanical braking device also includes a force sensor 71, a first washer 72, a bearing 73 and a second washer 74. Along the first direction X, the force sensor 71, the first washer 72, the bearing 73 and the second washer 74 are sequentially disposed between the clamp body 2 and the first stepped surface 3313.

[0078] When the inner brake pad 4 presses against the brake disc a, the brake disc a generates a reaction force on the inner brake pad 4. The inner brake pad 4 transmits the reaction force to the lead screw 331. The lead screw 331 moves away from the inner brake pad 4. The lead screw 331 transmits the force through the first step surface 3313 to the force sensor 71, the first shim 72, the bearing 73, and the second shim 74, thereby transmitting the reaction force to the caliper body 2. This causes the first part 21 of the caliper body 2 to move away from the inner brake pad 4 relative to the bracket 1. During the movement, the second part 22 of the caliper body 2 drives the pressure block 6 and the outer brake pad 5 to move closer to the brake disc a, thereby causing the inner brake pad 4 and the outer brake pad 5 to clamp the brake disc a together, achieving braking.

[0079] The force sensor 71 is used to detect the clamping force of the electromechanical braking device. The bearing 73 can be a needle roller bearing 73 to reduce hard friction, thereby improving drive efficiency.

[0080] Optionally, refer to Figure 1 The first step surface 3313 is constructed as an arc surface. Along the radial direction of the lead screw 331, the arc surface has an inner circumference and an outer circumference. Along the first direction X, the inner circumference is farther away from the inner brake pad 4 than the outer circumference.

[0081] The first step surface 3313 is constructed as an arc surface, which can evenly distribute the force of the lead screw 331 to the clamp body 2, reduce the impact of the angle change of the receiving cavity 210 on the measurement accuracy of the force sensor 71 after the clamp body 2 is deformed, and improve the stability of the braking pressure of the electronic braking device.

[0082] It should be noted that since the second gasket 74 abuts against the first step surface 3313, the second gasket 74 has an arc surface that matches the arc surface of the first step surface 3313.

[0083] refer to Figure 1 and Figure 2 The bracket 1 has two sliding connection holes spaced apart along the second direction Z. The electromechanical braking device also includes two pins 9, both of which are fixedly connected to the clamp body 2 and slidably connected to their corresponding sliding connection holes. The first direction X, the second direction Z, and the vertical direction Y are all perpendicular to each other.

[0084] When the driver 31 drives the lead screw 331 to rotate, the lead screw 331 drives the nut 332 to move toward the inner brake pad 4. When the nut 332 abuts against the inner brake pad 4, it drives the inner brake pad 4 to move toward the brake disc a, so that the inner brake pad 4 presses against the brake disc a. When the inner brake pad 4 presses against the brake disc a, the brake disc a generates a reaction force on the inner brake pad 4. The inner brake pad 4 transmits the reaction force to the lead screw 331, and the lead screw 331 then transmits the reaction force to the caliper body 2, so that the pin of the caliper body 2 slides relative to the sliding connection hole of the bracket 1. The first part 21 of the caliper body 2 moves away from the inner brake pad 4. During the movement, the second part 22 of the caliper body 2 drives the pressure block 6 and the outer brake pad 5 to move toward the brake disc a. The outer brake pad 5 bears the force of the second part 22 and the pressure block 6 at the same time, thereby increasing the force-bearing area of ​​the outer brake pad 5 and making the force distribution on the outer brake pad 5 uniform, reducing the probability of uneven wear of the outer brake pad 5.

[0085] It should be noted that since the outer brake pad is fixedly connected to the pressure block 6, and the pressure block 6 is fixedly connected to the second part 22, the outer brake pad 5 will move during the movement of the caliper 2, thereby eliminating the sliding connection between the outer brake pad 5 and the bracket 1, and thus reducing the sliding resistance when the outer brake pad 5 moves.

[0086] Secondly, embodiments of this application provide a vehicle including the electromechanical braking device described in any of the above embodiments.

[0087] The vehicle in this embodiment includes the electromechanical braking device described in any of the above embodiments, and has the beneficial effects of the electromechanical braking device described in any of the above embodiments. It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0088] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0089] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0090] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An electromechanical braking device, characterized in that, include: Support (1); The clamp body (2) is slidably connected to the bracket (1) along the first direction (X). The clamp body (2) has a first part (21) and a second part (22) arranged opposite to each other. The first part (21) is provided with a receiving cavity (210), and the second part (22) is provided with a first opening (220). Along the first direction (X), the first opening (220) is arranged opposite to the receiving cavity (210). A drive mechanism (3) is disposed in the first part (21), and a portion of the drive mechanism (3) is housed in the receiving cavity (210). Inner brake pad (4) and outer brake pad (5), along the first direction (X), the inner brake pad (4) and the outer brake pad (5) are arranged opposite to each other and spaced apart, the inner brake pad (4) and the outer brake pad (5) are adapted to move toward each other under the drive of the drive mechanism (3); The electromechanical braking device further includes a pressure block (6), which is fixed to the clamp body (2) and at least partially disposed in the first opening (220). The outer brake pad (5) is fixed to the pressure block (6) and abuts against the pressure block (6) along the first direction (X).

2. The electromechanical braking device according to claim 1, characterized in that, The pressure block (6) has a first side surface (61), and the outer brake pad (5) has a second side surface (51). Along the first direction (X), the first side surface (61) and the second side surface (51) are opposite to and abut against each other.

3. The electromechanical braking device according to claim 2, characterized in that, The second part (22) has a third side surface (221) along the first direction (X), the third side surface (221) being disposed opposite to and abutting against the second side surface (51).

4. The electromechanical braking device according to claim 2, characterized in that, The pressure block (6) is provided with a mounting groove (62) along the first direction (X), the mounting groove (62) penetrates the first side surface (61), and the second side surface (51) is provided with a mounting post (52), the mounting post (52) and the mounting groove (62) are interference fit.

5. The electromechanical braking device according to claim 1, characterized in that, The bracket (1) is provided with a first guide rail (11), and the inner brake pad (4) is provided with a first slider (41). The first slider (41) slides with the first guide rail (11) so that the inner brake pad (4) moves relative to the bracket (1) in a first direction (X).

6. The electromechanical braking device according to claim 1, characterized in that, The drive mechanism (3) includes a driver (31) and a housing (32). The driver (31) is disposed inside the housing (32). The inner brake pad (4) and the outer brake pad (5) are adapted to move toward each other under the drive of the driver (31). Along the vertical direction (Y), the housing (32) has two spaced first mounting holes (321), and the first part (21) has two spaced second mounting holes (211). The two first mounting holes (321) correspond one-to-one with the two second mounting holes (211). The electromechanical braking device further includes two fasteners (8), each of which passes through a corresponding first mounting hole (321) and a corresponding second mounting hole (211).

7. The electromechanical braking device according to claim 6, characterized in that, The drive mechanism (3) further includes a transmission component (33), which is constructed as a ball screw. The ball screw includes a screw (331) and a nut (332). The screw (331) is connected to the drive end of the driver (31). The nut (332) cooperates with the screw (331). The nut (332) is movably disposed in the clamp body (2) and selectively abuts against the inner brake pad (4).

8. The electromechanical braking device according to claim 7, characterized in that, The lead screw (331) includes a first section (3311) and a second section (3312) connected together. The first section (3311) is connected to the drive end of the driver (31), and the second section (3312) is engaged with the nut (332). The outer diameter of the first section (3311) is smaller than the outer diameter of the second section (3312) to form a first stepped surface (3313). The electromechanical braking device further includes a force sensor (71), a first shim (72), a bearing (73), and a second shim (74). Along the first direction (X), the force sensor (71), the first shim (72), the bearing (73), and the second shim (74) are sequentially disposed between the clamp body (2) and the first step surface (3313).

9. The electromechanical braking device according to claim 8, characterized in that, The first step surface (3313) is constructed as an arc surface. Along the radial direction of the lead screw (331), the arc surface has an inner circumference and an outer circumference. Along the first direction (X), the inner circumference is farther away from the inner brake pad (4) than the outer circumference.

10. A vehicle, characterized in that, The electromechanical braking device includes any one of claims 1 to 9.

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