Electromechanical brake apparatus comprising two pressure sensors having different ranges, and vehicle

Abstract

An electromechanical brake apparatus (100) comprising two pressure sensors having different ranges. The electromechanical brake apparatus (100) is used for driving a friction plate (21) to brake a brake disc (1002), and comprises a brake caliper (30) and two pressure sensors having different ranges. The brake caliper (30) comprises a caliper body; and the caliper body is used for mounting the two pressure sensors and the friction plate (21). A first pressure sensor is used for measuring the pressure borne by the friction plate (21) during zero point detection; a second pressure sensor is used for measuring the pressure of the friction plate (21) pressing the brake disc (1002) during braking; and the range of the first pressure sensor is less than that of the second pressure sensor. In this way, the control precision of a braking force is improved by means of cooperation of two pressure sensors having different ranges. In addition, the present invention also relates to a vehicle comprising the electromechanical brake apparatus.

Description

Electromechanical braking devices and vehicles with dual pressure sensors having different ranges

[0001] This application claims priority to Chinese Patent Application No. 202410486758.4, filed on April 22, 2024, entitled “Electromechanical Braking Device and Vehicle with Dual Pressure Sensors of Different Ranges”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of vehicle technology, specifically to an electromechanical braking device with dual pressure sensors having different ranges and a vehicle. Background Technology

[0003] Electro-mechanical brakes (EMBs) use a motor and a mechanical feed mechanism to drive the brake. EMBs are characterized by their simple structure, rapid response, smooth load transfer, and lack of hydraulic lines, resulting in high transmission efficiency. Furthermore, EMBs are trending towards miniaturization to better fit the wheel-side space of vehicles. Summary of the Invention

[0004] This application provides an electromechanical braking device with dual pressure sensors having different ranges and a vehicle, which improves the braking force control accuracy of the electromechanical braking device by having two pressure sensors with different ranges work together.

[0005] In a first aspect, this application provides an electromechanical braking device with dual pressure sensors having different ranges. The electromechanical braking device is used to drive at least one friction pad to brake a brake disc. The device includes a brake caliper and two pressure sensors with different ranges. The brake caliper includes at least one clamp body for mounting the two pressure sensors and at least one friction pad. The first pressure sensor is used to detect the pressure exerted on at least one friction pad during zero-point detection, and the second pressure sensor is used to detect the pressure exerted by at least one friction pad on the brake disc during braking.

[0006] The range of the first type of pressure sensor is smaller than that of the second type of pressure sensor.

[0007] The electromechanical braking device of this application uses two pressure sensors with different ranges, each operating in a different phase. The first pressure sensor has a smaller range, which facilitates more accurate detection of the pressure on a single friction pad during zero-point detection. The second pressure sensor has a larger range, which facilitates detection of the pressure exerted by a friction pad against a brake disc throughout the entire braking process.

[0008] The electromechanical braking device of this application works in conjunction with two pressure sensors with different ranges, which can take into account the detection accuracy during the zero-point detection process and the detection range during the entire braking process, thereby improving the braking force control accuracy of the electromechanical braking device.

[0009] In one implementation, a zero-point detection process is used to determine a preset pressure value, which indicates that the pressure exerted by the electromechanical braking device on at least one friction pad is greater than zero during braking.

[0010] In one implementation, one of the clamps in at least one clamp is used to mount a friction pad and to accommodate at least one first-type pressure sensor. The first-type pressure sensor is arranged along the axial direction of a brake disc on the side of the friction pad away from the brake disc, and the first-type pressure sensor is used to detect the pressure applied to the friction pad.

[0011] In this implementation, at least one first type of pressure sensor is installed on a clamp body and detects the pressure of a friction pad installed on the same clamp body during the braking process to achieve the zero-point detection function.

[0012] In one implementation, a clamp body is further configured to accommodate at least one elastic element, each elastic element being configured to cushion the reverse pressure exerted on a friction plate by a first pressure sensor. Specifically, along the axial direction of a brake disc, an elastic element is arranged in abutment against either the first pressure sensor on the side facing the clamp body or on the side facing the friction plate.

[0013] In this implementation, an elastic element is provided on one side of each first pressure sensor along the axial direction of a brake disc. This element can buffer the reverse pressure of a friction pad on the first pressure sensor during braking, thus preventing damage to the first pressure sensor that may be caused by excessive reverse pressure from a friction pad.

[0014] In one implementation, a clamp body includes a receiving groove and a slider. The receiving groove is used to receive a first type of pressure sensor. A slider is arranged between a first type of pressure sensor and a friction plate along the axial direction of a brake disc. The opening of the receiving groove faces a friction plate and is used to receive a portion of the slider. A friction plate is used to securely connect another portion of the slider.

[0015] In this implementation, a clamp body houses and secures a first pressure sensor via a receiving groove. A slider is positioned between the first pressure sensor and a friction plate along the axial direction of a brake disc. The slider slides and presses against the first pressure sensor within the receiving groove to transmit the pressure exerted by the friction plate pressing against the brake disc to the first pressure sensor.

[0016] In one implementation, a receiving groove includes a first segment and a second segment connected together. The first segment, along the axial direction of a brake disc, is positioned on the side of the second segment away from a friction pad, and the first segment is used to receive a first type of pressure sensor.

[0017] Along the radial direction of a brake disc, the dimension of the first segment is smaller than the dimension of the second segment and smaller than the maximum width of a slider.

[0018] In this implementation, the first segment of a receiving groove is smaller than the second segment, allowing a slider to slide within the second segment and drive a friction plate. An abutment surface is formed at the junction of the first and second segments along the axial direction of a brake disc, facing the friction plate. This abutment surface can be used to limit the displacement of the slider towards the first segment, thereby protecting the first type of pressure sensor.

[0019] In one implementation, a receiving groove is also used to at least partially receive an elastic element, the length of which along the axial direction of a brake disc is less than the sum of the length of a first pressure sensor and the natural length of the elastic element.

[0020] In this implementation, when an elastic element is not compressed, a first type of pressure sensor and an elastic element that are arranged in abutment extend from a first section of a receiving groove, ensuring reliable contact between the first type of pressure sensor and a sliding element to detect the pressure of a friction plate. When an elastic element is subjected to pressure from a sliding element, a first type of pressure sensor can retract into the first section by compressing an elastic element to avoid bearing greater pressure.

[0021] In one implementation, the electromechanical braking device includes two first-type pressure sensors mounted on the same clamp body. Specifically, along the axial direction of a brake disc, the two first-type pressure sensors are arranged between a clamp body and a friction plate.

[0022] Along the radial direction of a brake disc, the distance between the two first-type pressure sensors is greater than the outer diameter of either first-type pressure sensor. In one embodiment, the two first-type pressure sensors are symmetrically distributed around the center of a friction plate.

[0023] In this implementation, two first-type pressure sensors are arranged radially on both sides of the center of a friction pad to eliminate the detection data deviation that may be caused by the friction pad being subjected to force on one side only.

[0024] In one implementation, at least one clamping body is used to mount a friction pad and to accommodate a second pressure sensor. The second pressure sensor is arranged along the axial direction of a brake disc on the side of the friction pad away from the brake disc, and is used to detect the pressure exerted by the friction pad against one side of the brake disc.

[0025] In this implementation, a second type of pressure sensor is installed on a clamp body and detects the pressure of a friction pad installed on the same clamp body during the braking process to achieve the pressure detection function during the braking process.

[0026] In one implementation, the electromechanical braking device includes a lead screw, a clamp body for housing the lead screw and a second pressure sensor, and the lead screw for driving a friction pad. The lead screw is positioned between the friction pad and the second pressure sensor along the axial direction of a brake disc.

[0027] In this implementation, a lead screw is arranged along the axial direction of a brake disc between a second type of pressure sensor and a friction plate. The lead screw is used to drive the friction plate to slide, and the lead screw is used to transmit the pressure of the friction plate pressing against the brake disc to the second type of pressure sensor.

[0028] In one implementation, a clamp body further accommodates a thrust bearing, arranged along the axial direction of a brake disc between a lead screw and a second type of pressure sensor. Specifically, along the radial direction of the brake disc, the outer diameter of the thrust bearing is larger than the inner diameter of the second type of pressure sensor, smaller than the outer diameter of the lead screw, and smaller than the outer diameter of the second type of pressure sensor.

[0029] In this implementation, a thrust bearing is used to bear the reverse thrust of a friction plate acting on a leadscrew. One side of the thrust bearing rotates with the leadscrew within a clamping body, while the other side of the thrust bearing remains stationary relative to a second type of pressure sensor. The thrust bearing is used to reduce the friction between the leadscrew and the second type of pressure sensor to avoid frictional losses.

[0030] In one implementation, the electromechanical braking device includes a brake motor and a drive shaft. A clamp is used to fix the brake motor, and the drive shaft is used to drive a lead screw and the brake motor. A second type of pressure sensor is arranged between the lead screw and the brake motor along the axial direction of a brake disc.

[0031] Along the radial direction of a brake disc, a second type of pressure sensor is fitted onto the outside of a drive shaft.

[0032] In this implementation, a clamp housing a second type of pressure sensor also serves to secure a brake motor, and a lead screw receives the drive of the brake motor to actuate a friction plate mounted on the same clamp housing. A second type of pressure sensor allows a drive shaft to pass through, and this second type of pressure sensor, via a lead screw, detects the reverse pressure generated when a friction plate presses against a brake disc.

[0033] In one implementation, a clamp body includes a groove and a through hole. The groove accommodates a lead screw and a second type of pressure sensor. Along the axial direction of a brake disc, a through hole extends through the bottom of the groove, and the through hole accommodates a drive shaft passing through it. Specifically, along the radial direction of the lead screw, the diameter of the through hole is greater than or equal to the outer diameter of the drive shaft and less than the outer diameter of the second type of pressure sensor.

[0034] In this implementation, a clamp for accommodating a second type of pressure sensor accommodates a lead screw via a groove, the opening of which is axially opposite to a brake motor along a brake disc. A drive shaft passes through a through-hole to drively connect the lead screw and the brake motor. The diameter of the through-hole is smaller than the outer diameter of the second type of pressure sensor, which can abut against the bottom of the groove.

[0035] In one implementation, the brake caliper includes two caliper bodies arranged axially along both sides of a brake disc. One caliper body is used to mount a friction pad and a second pressure sensor, while the other caliper body is used to mount another friction pad and at least one first pressure sensor.

[0036] In this implementation, two pressure sensors with different ranges are mounted on two different clamping bodies. Two friction pads abut against a brake disc from opposite sides. The two pressure sensors are used to detect the pressure of the two friction pads respectively. Each clamping body is used to mount one friction pad and one pressure sensor, resulting in a relatively simple structure that is easy to manufacture.

[0037] In one implementation, at least one of the clamps is used to mount a friction plate and to accommodate a first pressure sensor and a second pressure sensor. The second pressure sensor is arranged between the friction plate and the first pressure sensor along the axial direction of a brake disc.

[0038] In this implementation, two pressure sensors with different ranges are mounted on the same clamp body, and both sensors are used to detect the pressure of the same friction plate. The overall structure of the brake caliper is more compact, which is beneficial for miniaturizing the electromechanical braking device. The first pressure sensor is located on the side of the second pressure sensor away from one of the friction plates, which allows for the placement of an elastic element or other structure on the side of the first pressure sensor to protect it.

[0039] Secondly, this application provides an electromechanical braking device, which includes a brake caliper and a lead screw. The brake caliper is used to fixably connect a brake motor and to accommodate the lead screw. The lead screw is used to drive the brake motor and to drive two friction pads. The brake caliper includes two mounting surfaces, each for mounting one friction pad. Along the axial direction of the lead screw, the distance between the other mounting surface and the lead screw is greater than the distance between the first mounting surface and the lead screw.

[0040] A lead screw consists of two end faces, and the distance between one end face and any mounting surface is greater than the distance between the other end face and any mounting surface.

[0041] At least one of the end faces or the other mounting face includes a receiving groove, each receiving groove being used to receive a portion of a pressure sensor, each pressure sensor being used to detect the pressure of one of the friction pads during braking.

[0042] In this implementation, the electromechanical braking device provided in this application mounts a friction pad on each of the two opposing mounting surfaces of the brake caliper. A brake motor drives the two friction pads to move closer together or further apart via a lead screw to engage or disengage from the brake disc. The electromechanical braking device also uses a pressure sensor to detect the pressure of one of the friction pads during braking and adjusts the torque output of the brake motor based on the detection signal from the pressure sensor to ensure reliable braking.

[0043] The electromechanical braking device provided in this application also accommodates a pressure sensor via a receiving groove, one of which is located at the distal end of the brake caliper relative to a brake motor or at the proximal end of a lead screw towards a brake motor. When the receiving groove is located at the distal end of the brake caliper, the axial dimension of the brake caliper relative to the proximal end of the brake motor can be compressed; similarly, when the receiving groove is located at the proximal end of the lead screw, the axial dimension of the brake caliper relative to the proximal end of the brake motor can be compressed. Thus, the axial dimension of the electromechanical braking device provided in this application is reduced on the side near the brake motor, facilitating adaptation of the electromechanical braking device to the wheel-side space.

[0044] In one implementation, one end face includes a receiving groove, and another mounting face includes another receiving groove. One receiving groove on one end face is used to accommodate a pressure sensor for detecting the pressure of a friction pad during braking.

[0045] Another mounting surface has another receiving groove for accommodating another pressure sensor, which is used to detect the pressure of another friction pad during braking.

[0046] The range of one pressure sensor is greater than the range of another pressure sensor.

[0047] In this implementation, the electromechanical braking device includes two pressure sensors, located in one receiving groove and the other in another, respectively, and each sensor detects the pressure of the two friction pads during braking. The two pressure sensors have different ranges: the sensor with the smaller range facilitates zero-point detection, improving braking accuracy; the sensor with the larger range facilitates detection of braking force throughout the entire braking stroke, ensuring reliable braking.

[0048] In one implementation, the other mounting surface includes two receiving grooves, each used to accommodate two pressure sensors. The range of each pressure sensor is less than the range of a single pressure sensor accommodated in one of the receiving grooves on one end face. Along the arrangement direction of the two receiving grooves on the other mounting surface, the distance between the two receiving grooves is greater than the outer diameter of one lead screw and less than the length of the other friction plate.

[0049] In this implementation, two pressure sensors with smaller ranges are positioned at the distal end of the brake caliper relative to a brake motor for joint detection to further improve detection accuracy. The two pressure sensors with smaller ranges are arranged radially on both sides of a leadscrew to eliminate potential data deviations caused by unilateral force on the other friction plate.

[0050] In one implementation, along the axis of a lead screw, another friction plate, a friction plate, a lead screw, and a brake motor are arranged in sequence.

[0051] In one implementation, a lead screw, another mounting surface, a mounting surface, a lead screw, and a brake motor are arranged sequentially along the axial direction of a lead screw. In another implementation, an end face includes a receiving groove, and the brake caliper is also used to receive another part of a pressure sensor. Specifically, along the radial direction of a lead screw, the inner diameter of the opening of the receiving groove is larger than the inner diameter of the pressure sensor.

[0052] In this implementation, the brake caliper is used to simultaneously accommodate a lead screw and a pressure sensor, with the pressure sensor partially extending into a receiving groove of the lead screw. That is, a portion of the pressure sensor, along with the lead screw and the brake caliper, is sequentially fitted radially along the lead screw, thereby compressing the axial dimension of the brake caliper.

[0053] In one implementation, a receiving groove is also used to accommodate a thrust bearing, which is arranged along the axial direction of a lead screw between the bottom of the receiving groove and a pressure sensor. The inner diameter of the receiving groove is larger than the outer diameter of the thrust bearing, and the outer diameter of the thrust bearing is larger than the inner diameter of the pressure sensor, along the radial direction of the lead screw.

[0054] In this implementation, a thrust bearing is used to bear the reverse thrust of a friction plate acting on a leadscrew. One side of the thrust bearing rotates with the leadscrew within a brake caliper, while the other side of the thrust bearing remains stationary relative to a pressure sensor. The thrust bearing is used to reduce the friction between the leadscrew and the pressure sensor to avoid frictional losses.

[0055] In one implementation, along the axial direction of a lead screw, the length of a receiving groove is less than the sum of the length of a thrust bearing and the length of a pressure sensor.

[0056] In this implementation, a thrust bearing and a pressure sensor are arranged in abutment along the axial direction of a lead screw. The pressure sensor extends at least partially out of a receiving groove along the axial direction of the lead screw to abut against a brake caliper. In one implementation, the brake caliper is also used to receive a threaded sleeve, and the lead screw is used to drive the threaded sleeve to move along the axial direction of the lead screw. A helical groove of the lead screw is used to engage with the helical groove of the threaded sleeve. Along the axial direction of the lead screw, the length of the receiving groove is less than the length of the helical groove of the lead screw, and the sum of the lengths of the helical groove and the receiving groove is greater than the length of the lead screw.

[0057] Along the radial direction of a lead screw, the outer diameter of the lead screw is larger than the outer diameter of a pressure sensor.

[0058] In this implementation, the helical groove on the inner circumferential surface of a screw sleeve engages with the helical groove on the outer circumferential surface of a lead screw, converting the rotational motion of a lead screw driven by a brake motor into a displacement along the axial direction of the lead screw. The screw sleeve then drives a friction plate to slide along the axial direction of the lead screw. Along the axial direction of the lead screw, the helical groove of the lead screw at least partially overlaps with a receiving groove, ensuring a reliable transmission of braking force through the engagement length between the lead screw and the screw sleeve. Furthermore, the receiving groove at least partially accommodates a pressure sensor, compressing the axial dimension of the brake caliper. In one implementation, the electromechanical braking device includes a drive shaft for receiving drive from the motor shaft of a brake motor. The bottom of the receiving groove is used to fixably connect to the drive shaft. Alternatively, the bottom of the receiving groove includes an internal spline for coupling the external spline of the drive shaft.

[0059] In this implementation, a drive shaft is used to drive a brake motor and a lead screw. One of the drive shafts and the lead screw is driven to the bottom of a receiving groove, which also partially accommodates the drive shaft to compress the axial dimension of the electromechanical braking device.

[0060] In one implementation, a pressure sensor is used to be fitted radially onto the outer circumferential surface of a drive shaft and to abut against the outer circumferential surface of the drive shaft.

[0061] In this implementation, a pressure sensor is radially positioned by abutting against the outer circumferential surface of a drive shaft, preventing the pressure sensor from moving radially within a groove along a lead screw and ensuring the detection accuracy of the pressure sensor.

[0062] In one implementation, the brake caliper includes a groove and a through hole. The groove accommodates a lead screw, a threaded sleeve, and a pressure sensor. Along the axial direction of the lead screw, the through hole extends through the bottom of the groove, and the through hole accommodates a drive shaft passing through it. Radially along the lead screw, the diameter of the through hole is greater than or equal to the outer diameter of the drive shaft and less than the outer diameter of the pressure sensor.

[0063] In this implementation, a brake caliper accommodates a lead screw via a groove on a mounting surface. The opening of the groove is axially away from a brake motor along the lead screw. A drive shaft passes through a through-hole to drively connect the lead screw and the brake motor. The diameter of the through-hole is smaller than the outer diameter of a pressure sensor, which abuts against the bottom of the groove. In one implementation, along the axial direction of the lead screw, one side of a pressure sensor directly abuts against the bottom of the groove, while the other side of the pressure sensor abuts against the bottom of a receiving groove via a thrust bearing.

[0064] In this implementation, a pressure sensor is in contact with a thrust bearing and the bottom of a groove on both sides, respectively, to detect the pressure of a friction pad during braking.

[0065] In one implementation, a pressure sensor includes an axial protrusion that is embedded in the bottom of a groove along the axial direction of a lead screw.

[0066] In this implementation, a pressure sensor abuts against the bottom of a groove, and further forms an axial protrusion embedded in the bottom of the groove. The axial protrusion can be used to accommodate the internal components of a pressure sensor and compress the axial dimension of the brake caliper by being embedded in the bottom of the groove.

[0067] In one implementation, a groove along the axial direction of a lead screw comprises two connected segments, one of which is further away from any mounting surface than the other segment is from any mounting surface. Along the radial direction of the lead screw, the diameter of the other segment is smaller than the outer circumferential diameter of the lead screw but larger than the outer diameter of a pressure sensor.

[0068] In this implementation, the outer diameter of a lead screw is larger than the outer diameter of a pressure sensor, and the inner diameter of a groove near the end of a pressure sensor is reduced, which can improve the structural strength of the brake caliper and compress the radial dimension of the other part of the groove.

[0069] In one implementation, the other mounting surface further includes another receiving groove for accommodating another pressure sensor and one end of a slider, the other end of which is used to fix another friction plate. The other pressure sensor is positioned between the slider and the bottom of the receiving groove.

[0070] In this implementation, another mounting surface located at the distal end of a brake motor includes another receiving groove, within which another pressure sensor is partially housed. By arranging the other pressure sensor on the side of the brake disc away from a brake motor, the axial dimension of the brake caliper on the side closer to the brake motor can be reduced, making better use of the vehicle's wheel-side space.

[0071] In one implementation, the bottom of another receiving groove includes a protrusion that extends from the bottom of the other receiving groove toward the opening, the outer diameter of the protrusion being less than or equal to the inner diameter of the other pressure sensor.

[0072] In this implementation, another pressure sensor can be fitted onto a protrusion of another receiving groove, facilitating the installation of the other pressure sensor within the other receiving groove.

[0073] In one implementation, another pressure sensor is fitted onto a protrusion, one side of the other pressure sensor directly abuts the bottom of another receiving groove, and the other side of the other pressure sensor directly abuts one end of a slider.

[0074] In this implementation, the other pressure sensor is radially positioned by abutting against the outer peripheral surface of a protrusion, preventing it from moving radially along a lead screw within the other receiving groove and ensuring the detection accuracy of the other pressure sensor. In one implementation, the length of the protrusion is less than or equal to the thickness of the other pressure sensor.

[0075] In this implementation, a protrusion is recessed relative to the bottom of the receiving groove of another pressure sensor, thus preventing the protrusion from abutting against another friction pad and affecting the pressure detection of the other pressure sensor.

[0076] In one implementation, another pressure sensor includes another axial protrusion that is embedded in the bottom of another receiving groove along the axial direction of a lead screw.

[0077] In this implementation, another pressure sensor abuts against the bottom of another receiving groove, and further forms an axial protrusion embedded in the bottom of the other receiving groove. The axial protrusion can be used to accommodate the internal components of the other pressure sensor and compress the axial dimension of the brake caliper by being embedded in the bottom of the other receiving groove.

[0078] Thirdly, this application provides a vehicle including wheels, a frame, and an electromechanical braking device provided in any of the above aspects. The brake caliper in the electromechanical braking device is used to slidably connect to the frame along the axial direction of the wheel.

[0079] At least one friction pad in an electromechanical braking device is used to brake the wheel disc along the wheel's axial direction.

[0080] Because the electromechanical braking device provided in this application improves the control precision of braking force, the vehicle provided in the third aspect of this application also achieves better braking performance and extends the service life of the electromechanical braking device. Attached Figure Description

[0081] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0082] Figure 1 is a schematic diagram of a partial appearance structure of the wheel of the vehicle provided in an embodiment of this application;

[0083] Figure 2 is a schematic diagram of a partial cross-sectional structure of the wheel of the vehicle provided in an embodiment of this application;

[0084] Figure 3 is a cross-sectional structural schematic diagram of the electromechanical braking device provided in the embodiment of this application;

[0085] Figure 4 is a cross-sectional structural diagram of the brake caliper in the electromechanical braking device provided in the embodiment of this application;

[0086] Figure 5 is a cross-sectional structural diagram of the internal components of the housing in the electromechanical braking device provided in the embodiment of this application;

[0087] Figure 6 is a cross-sectional structural schematic diagram of the electromechanical braking device provided in the embodiment of this application;

[0088] Figure 7 is a cross-sectional structural schematic diagram of the electromechanical braking device provided in the embodiment of this application;

[0089] Figure 8 is a cross-sectional structural diagram of the internal components of the second clamp in the electromechanical braking device provided in the embodiment of this application;

[0090] Figure 9 is a cross-sectional schematic diagram of the internal components of the second clamp in the electromechanical braking device provided in the embodiment of this application;

[0091] Figure 10 is a schematic diagram of the external structure of the sliding component of the electromechanical braking device provided in the embodiment of this application;

[0092] Figure 11 is a partially enlarged cross-sectional view of the internal components of the second clamp in the electromechanical braking device provided in the embodiment of this application;

[0093] Figure 12 is a cross-sectional structural diagram of the internal components of the second clamp in the electromechanical braking device provided in the embodiment of this application;

[0094] Figure 13 is a schematic diagram of the external structure of the first type of pressure sensor of the electromechanical braking device provided in the embodiment of this application;

[0095] Figure 14 is a schematic diagram of the external structure of the first type of pressure sensor of the electromechanical braking device provided in the embodiment of this application;

[0096] Figure 15 is a cross-sectional structural diagram of the internal components of the first clamp body in the electromechanical braking device provided in the embodiment of this application;

[0097] Figure 16 is a partially enlarged cross-sectional view of the internal components of the first clamp in the electromechanical braking device provided in the embodiment of this application;

[0098] Figure 17 is a schematic diagram of the external structure of the thrust bearing of the electromechanical braking device provided in the embodiment of this application;

[0099] Figure 18 is a partial cross-sectional view of the internal components of the first clamp in the electromechanical braking device provided in the embodiment of this application;

[0100] Figure 19 is a schematic diagram of the external structure of the lead screw of the electromechanical braking device provided in the embodiment of this application;

[0101] Figure 20 is a partial cross-sectional structural diagram of the first clamp body of the electromechanical braking device provided in the embodiment of this application;

[0102] Figure 21 is a cross-sectional structural schematic diagram of the electromechanical braking device provided in the embodiment of this application;

[0103] Figure 22 is a partial cross-sectional view of the internal components of the first clamp body in the electromechanical braking device provided in the embodiment of this application;

[0104] Figure 23 is a partially enlarged cross-sectional view of the internal components of the first clamp in the electromechanical braking device provided in the embodiment of this application;

[0105] Figure 24 is a partial cross-sectional view of the internal components of the first clamp in the electromechanical braking device provided in the embodiment of this application;

[0106] Figure 25 is a partial cross-sectional view of the internal components of the first clamp in the electromechanical braking device provided in the embodiment of this application;

[0107] Figure 26 is a partially enlarged cross-sectional view of the internal components of the first clamp in the electromechanical braking device provided in the embodiment of this application;

[0108] Figure 27 is a schematic diagram of the external structure of the second type of pressure sensor of the electromechanical braking device provided in the embodiment of this application;

[0109] Figure 28 is a partial cross-sectional view of the internal components of the brake caliper in the electromechanical braking device provided in the embodiment of this application;

[0110] Figure 29 is a cross-sectional structural diagram of the internal components of the first clamp body in the electromechanical braking device provided in the embodiment of this application. Detailed Implementation

[0111] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0112] This application provides an electromechanical braking device with dual pressure sensors having different ranges. The electromechanical braking device is used to drive at least one friction pad to brake a brake disc. The device includes a brake caliper and two pressure sensors with different ranges. The brake caliper includes at least one caliper body for mounting the two pressure sensors and at least one friction pad. The first pressure sensor detects the pressure on at least one friction pad during zero-point detection, while the second pressure sensor detects the pressure exerted by the at least one friction pad on the brake disc during braking. The range of the first pressure sensor is smaller than the range of the second pressure sensor.

[0113] The electromechanical braking device of this application works in conjunction with two pressure sensors with different ranges, which can take into account the detection accuracy during the zero-point detection process and the detection range during the entire braking process, thereby improving the braking force control accuracy of the electromechanical braking device.

[0114] This application provides a vehicle including wheels, a frame, and the electromechanical braking device provided in this application. The electromechanical braking device is fixed to the frame and located at the wheels, and brakes the wheels via an internal mechanism. The brake calipers in the electromechanical braking device are used to slide along the wheel's axial direction to connect with the frame. At least one friction pad in the electromechanical braking device is used to brake the wheel's brake disc along the wheel's axial direction. The vehicle provided by this application offers better braking performance and a longer service life.

[0115] The vehicle provided in this application may include multiple electromechanical braking devices, each corresponding to a specific wheel. The vehicle also includes a brake pedal for controlling the multiple electromechanical braking devices to displace the friction pads toward or away from the brake disc of the wheel.

[0116] Please refer to Figure 1, which shows a schematic diagram of the partial appearance structure of the vehicle wheel provided in this embodiment of the application.

[0117] As shown in Figure 1, the wheel 1001 is equipped with a brake disc 1002, which is coaxially fixed to the wheel hub of the wheel 1001. When the wheel 1001 rotates relative to the frame, the brake disc 1002 rotates synchronously with the wheel 1001 relative to the frame. In the illustration of Figure 1, the outer diameter of the brake disc 1002 is smaller than the inner diameter of the inner rim of the wheel, and the brake disc 1002 is housed within the inner rim of the wheel 1001.

[0118] The electromechanical braking device 100 provided in this application is fixed to the vehicle frame. The electromechanical braking device 100 extends at least partially into the inner ring of the wheel 1001 and cooperates with the brake disc 1002 to brake the wheel 1001.

[0119] Please refer to Figure 2, which shows a schematic diagram of a partial cross-sectional structure of a vehicle wheel provided in an embodiment of this application.

[0120] As shown in Figure 2, the electromechanical braking device 100 provided in this application includes a caliper frame 10, a friction pad 21, a brake caliper 30, a lead screw 41, and a brake motor 50. The connection relationship between the lead screw 41, the brake motor 50, and the brake caliper 30 is shown in Figure 3. The caliper frame 10 is used to fix and connect to the vehicle frame. The brake caliper 30 is slidably connected to the caliper frame 10. The brake motor 50 is fixed to the brake caliper 30 and slides synchronously with the brake caliper 30 relative to the caliper frame 10. In one embodiment, the brake caliper 30 and the caliper frame 10 are slidably connected by a through hole and a sliding rod. That is, the brake caliper 30 has one of the through hole and the sliding rod, and the caliper frame 10 has the other of the through hole and the sliding rod. The relative sliding between the brake caliper 30 and the caliper frame 10 is achieved by the axial sliding of the sliding rod in the through hole.

[0121] It should be noted that the sliding direction of the brake caliper 30 relative to the caliper bracket 10 is parallel to the axial direction of the brake disc 1002. That is, the axial direction of the brake motor 50 in the electromechanical braking device 100 is parallel to the axis of the wheel 1001. The brake motor 50 is used to slide along the axial direction of the wheel 1001 to connect to the frame. Corresponding to the above-mentioned embodiment of the through hole and slide rod, the axial direction of the through hole and the axis of the slide rod are both parallel to the axial direction of the brake disc 1002.

[0122] The brake caliper 30 is used to mount the friction pads 21, fix a brake motor 50, and accommodate a lead screw 41. In the schematic diagram of Figure 2, there are two friction pads 21, arranged axially on both sides of the brake disc 1002. The two friction pads 21 face opposite outer surfaces of the brake disc 1002.

[0123] As shown in Figure 2, in the electromechanical braking device 100, the brake motor 50 drives two friction pads 21 to slide along the axial direction of the wheel 1001 to abut against the brake disc 1002. In this embodiment, the brake motor 50 drives the friction pads 21 toward or away from the brake disc 1002 of the vehicle. The brake motor 50 rotates relative to the caliper bracket 10 by driving the lead screw 41, pushing the two friction pads 21 to slide toward each other and contact the two outer surfaces opposite to the brake disc 1002, thereby generating friction to brake the brake disc 1002.

[0124] For ease of description, along the axial direction of the brake disc 1002, this application defines the friction plate 21 closer to the lead screw 41 as the first friction plate 211, and the friction plate 21 farther from the lead screw 41 as the second friction plate 212.

[0125] Please refer to Figure 3, which shows a cross-sectional view of the electromechanical braking device 100 provided in an embodiment of this application.

[0126] As shown in Figure 3, the electromechanical braking device 100 of this application further includes a brake caliper 30, a lead screw 41, and a brake motor 50. The axis of the lead screw 41 is parallel to the axial direction of the brake disc 1002. Along the axial direction of the lead screw 41, the brake caliper 30 is closer to the wheel 1001 than the brake motor 50. The brake caliper 30 is used to fix the brake motor 50 and to accommodate the lead screw 41. In one embodiment, the electromechanical braking device 100 of this application further includes a reducer 60, which is used to drive the brake motor 50 and the lead screw 41. The reducer 60 is used to adjust the speed and torque of the braking force output by the brake motor 50 and transmit the adjusted braking force to the lead screw 41.

[0127] The lead screw 41 is used to drive the brake motor 50 and to drive the two friction plates 21. The two friction plates 21 are used to slide the caliper frame 10. The lead screw 41 drives the first friction plate 211 to slide relative to the caliper frame 10. The second friction plate 212 is used to fixally or slide the brake caliper 30. That is, along the axial direction of the lead screw 41, the second friction plate 212, the first friction plate 211, the lead screw 41, and the brake motor 50 are arranged in sequence.

[0128] In this embodiment, the brake motor 50 includes a housing 51, which is fixedly connected to the brake caliper 30 along the axial direction of the brake motor 50. Referring to Figure 5, the housing 51 is used to fix the stator 52 of the brake motor 50. The inner cavity of the housing 51 is used to accommodate the stator 52 and rotor 53 of the brake motor 50. In one embodiment, the housing 51 of the brake motor 50 is also used to accommodate the gear set 61 of the reducer 60. That is, the gear set 61 of the reducer 60 is integrated within the housing 51 of the brake motor 50, so that the internal structure of the electromechanical braking device 100 is arranged more compactly, reducing the overall volume. The brake caliper 30 is used to house the lead screw 41. The brake caliper 30 is also used to drive the housing 51 and slide relative to the caliper holder 10 along the axial direction of the brake disc 1002. The reducer 60 is used to drive the lead screw 41 and the brake motor 50, and the brake motor 50 is used to drive the reducer 60 to rotate, thereby pushing the friction plate 21 and driving the brake caliper 30.

[0129] Please refer to Figure 4 for a cross-sectional view of the brake caliper 30 in the electromechanical braking device 100 provided in this embodiment of the application.

[0130] The brake caliper 30 includes two mounting surfaces, each for mounting a friction plate 21. Along the axial direction of a lead screw 41, the distance between the other mounting surface and the lead screw 41 is greater than the distance between the first mounting surface and the lead screw 41. The mounting surface with a smaller distance from the lead screw 41 along the axial direction is defined as the first mounting surface 30a, and the mounting surface with a larger distance from the lead screw 41 along the axial direction is defined as the second mounting surface 30b. That is, along the axial direction of the lead screw 41, the second mounting surface 30b, the first mounting surface 30a, the lead screw 41, and the brake motor 50 are arranged sequentially. The first friction plate 211 is mounted on the first mounting surface 30a, and the second friction plate 212 is mounted on the second mounting surface 30b.

[0131] In this embodiment, the brake caliper 30 is generally U-shaped and includes at least one clamping body for mounting at least one friction plate 21. In the schematic diagram of FIG4, the brake caliper 30 includes two clamping bodies and a connecting portion 33 connecting the two clamping bodies. In one embodiment, the clamping body of the brake caliper 30 closer to the brake motor 50 along the axial direction of the lead screw 41 is the first clamping body 31, and the clamping body of the brake caliper 30 further away from the brake motor 50 along the axial direction of the lead screw 41 is the second clamping body 32. In the schematic diagram of FIG4, the first clamping body 31 is used to mount the first friction plate 211, and the second clamping body 32 is used to mount the second friction plate 212.

[0132] The first clamp body 31 and the second clamp body 32 are arranged on both sides of the brake disc 1002 along the axial direction of the brake disc 1002. The first clamp body 31 and the second clamp body 32 are also arranged on both sides of the two friction pads 21 along the axial direction of the brake disc 1002. Along the axial direction of the brake disc 1002, the first mounting surface 30a is the surface of the first clamp body 31 facing the second clamp body 32, and the second mounting surface 30b is the surface of the second clamp body 32 facing the first clamp body 31. In other words, the first clamp body 31, the first friction pad 211, the brake disc 1002, the second friction pad 212, and the second clamp body 32 are arranged sequentially along the axial direction of the brake disc 1002. The connecting part 33 is located on the outer side of the brake disc 1002 along the radial direction of the brake disc 1002, and the connecting part 33 is used to fix the first clamp body 31 and the second clamp body 32.

[0133] In one embodiment, the first friction plate 211 is slidably connected to the first clamping body 31. In another embodiment, the second friction plate 212 is slidably connected to the second clamping body 32.

[0134] The first clamp body 31 is also used for sliding connection of the caliper bracket 10. A lead screw 41 is housed within the first clamp body 31. A housing 51 is fixed to the side of the first clamp body 31 away from the second clamp body 32. The lead screw 41 is used for transmission connection to the reducer 60. The first clamp body 31 and the housing 51 are each provided with through holes to allow passage of the drive shaft 43 between the lead screw 41 and the reducer 60. In one embodiment, the drive shaft 43 and the lead screw 41 are an integral structure; that is, one end of the lead screw 41 passes through two through holes and extends into the housing 51 to drive the reducer 60.

[0135] In one embodiment, the transmission shaft 43 and the drive shaft of the reducer 60 are an integral structure, that is, the drive shaft of the reducer 60 passes through two through holes and extends into the inner cavity of the first clamp 31 and is fixedly connected to the lead screw 41.

[0136] The electromechanical braking device 100 of this application also includes a threaded sleeve 42. The threaded sleeve 42 is coaxially sleeved on the outside of the lead screw 41, which is used for coaxial transmission with the output shaft of the reducer 60. The output shaft of the reducer 60 drives the lead screw 41 to rotate, thereby causing the threaded sleeve 42 to slide.

[0137] In one embodiment, the outer peripheral surface of the lead screw 41 includes a helical groove 412, through which the lead screw 41 engages with the threaded sleeve 42. When the lead screw 41 is driven to rotate along its own axis by the reducer 60, the lead screw 41 can drive the threaded sleeve 42 to slide along the axis of the lead screw 41. On the side of the threaded sleeve 42 away from the reducer 60, the threaded sleeve 42, the first friction plate 211, and the brake disc 1002 are arranged sequentially along the axis of the lead screw 41. By driving the threaded sleeve 42 to slide along the axis of the lead screw 41, the lead screw 41 can drive the friction plate 21 to move relative to the brake disc 1002.

[0138] Referring to Figure 5, the brake motor 50 also includes a motor shaft 54, the axis of which coincides with the axis of the lead screw 41. The motor shaft 54 ​​is used to coaxially fix the rotor 53 of the brake motor 50, and the motor shaft 54 ​​is also used to coaxially fix the output shaft of the reducer 60.

[0139] In this embodiment, the stator 52 of the brake motor 50 is also electrically connected to an external circuit. When the electromechanical braking device 100 of this application is working, the alternating current of the external circuit can cause the stator 52 to generate an alternating magnetic field. The rotor 53 rotates axially around the lead screw 41 based on the alternating magnetic field, and drives the motor shaft 54 ​​to rotate synchronously. Due to the different voltage phases of the alternating current, the rotation direction of the rotor 53 is also different. That is, the motor shaft 54 ​​of the brake motor 50 can rotate in one direction to drive the friction plate 21 to achieve braking, and the motor shaft 54 ​​of the brake motor 50 can also rotate in another direction to release the friction plate 21 from the brake disc 1002 to release the brake. One direction refers to the forward rotation of the motor shaft 54 ​​of the brake motor 50, and the other direction refers to the reverse rotation of the motor shaft 54 ​​of the brake motor 50.

[0140] When the brake motor 50 rotates forward, the reducer 60 drives the lead screw 41 to rotate forward along its own axis. The sleeve 42 slides along the axis of the lead screw 41 toward the brake disc 1002, causing the friction pad 21 to contact the brake disc 1002 to achieve braking. When the brake motor 50 rotates in reverse, the reducer 60 drives the lead screw 41 to rotate in reverse along its own axis. The sleeve 42 slides along the axis of the lead screw 41 in a direction away from the brake disc 1002, and the friction pad 21 is released from the brake disc 1002.

[0141] In one embodiment, a separation spring 22 is provided between the two friction plates 21. The opposite ends of the separation spring 22 abut against the two friction plates 21 respectively. The separation spring 22 is used to provide elastic force for the two friction plates 21 to move away from each other along the axial direction of the lead screw 41, so as to ensure that after the screw sleeve 42 slides away from the brake disc 1002, the two friction plates 21 release contact with the brake disc 1002 to release the brake.

[0142] In one embodiment, the electromechanical braking device 100 of this application further includes ball bearings, which are rotatably disposed between the lead screw 41 and the threaded sleeve 42. For ease of explanation of the overall structure, the ball bearings are not shown in the figures. There are multiple ball bearings, which abut against the outer circumferential surface of the lead screw 41 and the inner circumferential surface of the threaded sleeve 42. The ball bearings are used to reduce the frictional force between the lead screw 41 and the threaded sleeve 42, thereby improving the transmission efficiency between them.

[0143] Please refer to Figure 5 for a cross-sectional view of the internal components of the housing 51 in the electromechanical braking device provided in this embodiment of the application.

[0144] As shown in Figure 5, in one embodiment, the stator 52 and rotor 53 are arranged coaxially along the radial direction of the brake motor 50. The stator 52 is used to drive the rotor 53 to rotate to output power. The brake motor 50 also includes a motor shaft 54, which is coaxially fixed to the rotor 53.

[0145] In the embodiment shown in Figure 5, the brake motor 50 is an internal rotor motor, with the stator 52 coaxially sleeved on the outside of the rotor 53, and the rotor 53 located within the central hole of the stator 52. In this case, the housing 51 is used to fix the stator 52, and the stator 52 drives the rotor 53 to rotate within the central hole of the stator 52. In another embodiment, the brake motor 50 is an external rotor motor, with the rotor 53 coaxially sleeved on the outside of the stator 52, and the stator 52 located within the central hole of the rotor 53. In this case, the housing 51 has a support cylinder structure, which is used to fix the stator 52, and the stator 52 drives the rotor 53 to rotate outside the stator 52.

[0146] The reducer 60 includes an output shaft 62, a drive shaft 63, and a gear set 61. The output shaft 62 and the drive shaft 63 are connected by the gear set 61. The output shaft 62 is used to drive the brake motor 50. The drive shaft 63 is used to drive the lead screw 41. In one embodiment, the output shaft 62 of the reducer 60 drives the motor shaft 54 ​​of the brake motor 50. The drive shaft 63 of the reducer 60 coaxially drives the lead screw 41.

[0147] The gear set 61 is used to adjust the speed and torque of the braking force output by the motor shaft 54 ​​of the brake motor 50. In one embodiment, the axis of the output shaft 62 in the reducer 60 is offset from the axis of the drive shaft 63 in the radial direction of the brake motor 50. The gear set 61 has a relatively compact structure and can provide a large reduction ratio, which is beneficial to the miniaturization of the drive mechanism of this application.

[0148] In the schematic diagrams of Figures 3 and 5, the reducer 60 is a coaxial reducer, and the gear set 61 is a planetary gear set. This structure can reduce the size of the reducer 60. Thus, the output shaft 62 of the reducer 60 is connected to the motor shaft 54 ​​of the brake motor 50 via the planetary gear set. At this time, the motor shaft 54 ​​and the output shaft 62 are spaced apart along the axial direction of the brake motor 50. In one embodiment, the gear set 61 of the reducer 60 is a parallel shaft gear set, in which case the output shaft 62 of the reducer 60 and the motor shaft 54 ​​of the brake motor 50 are coaxially driven. The above implementation does not affect the functional realization of the electromechanical braking device 100 of this application.

[0149] When the vehicle needs to brake, the stator 52 of the brake motor 50 drives the rotor 53 to rotate the motor shaft 54 ​​clockwise. The motor shaft 54 ​​drives the output shaft 62 of the reducer 60, which is connected to the transmission, to rotate synchronously clockwise. The output shaft 62 drives the drive shaft 63 to rotate clockwise through the gear set 61. The drive shaft 63 drives the lead screw 41 to rotate synchronously clockwise. The lead screw 41 converts its rotational motion into the sliding motion of the sleeve 42, that is, the lead screw 41 drives the sleeve 42 to slide along the axis of the lead screw 41. The sliding direction of the sleeve 42 is towards the brake disc 1002. The sleeve 42 pushes the first friction plate 211 towards the brake disc 1002, and makes the first friction plate 211 contact the brake disc 1002 to generate friction.

[0150] After the first friction plate 211 contacts and abuts against the brake disc 1002, the stator 52 of the brake motor 50 continues to drive the rotor 53 to rotate forward. Following the same power transmission path, the sleeve 42 continues to slide axially along the lead screw 41. Because the position of the brake disc 1002 is fixed, the sleeve 42, the first friction plate 211, and the brake disc 1002 abut against each other in sequence. The sleeve 42 receives a reverse abutting thrust from the brake disc 1002, and the axial sliding motion of the sleeve 42 relative to the lead screw 41 is converted into a reverse pushing motion of the sleeve 42 against the brake caliper 30 relative to the caliper holder 10. That is, after the first friction plate 211 contacts and abuts against the brake disc 1002, the axial dimension of the meshing of the lead screw 41 and the sleeve 42 further increases under the action of the brake motor 50, pushing the brake caliper 30 towards the housing 51 to slide relative to the caliper holder 10. The housing 51 slides synchronously with the brake caliper 30 in a direction away from the brake disc 1002.

[0151] The sliding of the brake caliper 30 toward the housing 51 causes the second caliper body 32 to slide synchronously toward the housing 51. Because the second caliper body 32 is located on the side of the brake disc 1002 facing away from the housing 51, the sliding direction of the second caliper body 32 is toward the brake disc 1002. That is, after the first friction pad 211 contacts and abuts against the brake disc 1002, the lead screw 41 further drives the second caliper body 32 to slide toward the brake disc 1002. The second caliper body 32 thus drives the second friction pad 212 to slide synchronously toward the brake disc 1002, causing the second friction pad 212 to contact the brake disc 1002 and generate friction.

[0152] Thus, through the cooperation of the lead screw 41 and the sleeve 42, the two friction pads 21 located on both sides of the brake disc 1002 are driven to slide towards each other and contact the two opposite outer surfaces of the brake disc 1002 respectively, generating friction to brake the brake disc 1002 and realize vehicle braking.

[0153] After braking is completed, the stator of the brake motor 50 drives the rotor 53 to reverse. The rotor 53 sequentially drives the output shaft 62, drive shaft 63, and lead screw 41 of the reducer 60 to reverse synchronously. The reverse rotation of the lead screw 41 causes the screw sleeve 42 to slide away from the brake disc 1002, thereby increasing the distance between the two friction pads 21. Under the action of the release spring 22, the two friction pads 21 release contact with the brake disc 1002 to release the brake, allowing the wheel 1001 to continue rotating and drive the vehicle.

[0154] In one embodiment, the electromechanical braking device 100 includes a return spring arranged between the brake caliper 30 and the caliper holder 10. For ease of explanation of the overall structure, the return spring is not shown in the figures. The return spring drives the brake caliper 30 to slide relative to the caliper holder 10 in a direction away from the housing 51, thereby driving the second caliper body 32 to slide in a direction away from the brake disc 1002, ensuring that the two friction pads 21 are reliably separated from the brake disc 1002.

[0155] Therefore, after braking is completed, the friction pads 21 located on both sides of the brake disc 1002 are driven to slide in opposite directions through the cooperation of the lead screw 41 and the sleeve 42, and release their contact with the two outer surfaces of the brake disc 1002 respectively to release the brake, so that the wheel 1001 can continue to rotate and drive the vehicle to move.

[0156] In one embodiment, the brake motor 50 further includes a circuit board 55. The circuit board 55 is used to fix a drive circuit, which drives the stator 52 of the brake motor 50. The circuit board 55 is housed together with the brake motor 50 in the inner cavity of the housing 51, which can shorten the signal transmission distance from the drive circuit to the stator 52 of the brake motor 50 and simplify the internal wiring layout of the brake motor 50. At the same time, the housing 51 can provide a reliable sealing and protection effect for the circuit board 55.

[0157] In one embodiment, the electromechanical braking device 100 of this application further includes a position sensor. The position sensor is used to detect the rotation angle of the motor shaft 54 ​​of the brake motor 50, thereby adjusting the braking force of the brake motor 50. The position sensor includes a stator and a rotor. The stator of the position sensor is fixed to the housing 51, and the rotor of the position sensor is coaxially driven with the motor shaft 54 ​​of the brake motor 50 or the output shaft 62 of the reducer 60. In one embodiment, the stator of the position sensor is directly fixed to the housing 51. In another embodiment, the stator of the position sensor is fixed to a circuit board 55 and indirectly fixed to the housing 51 through the circuit board 55. The rotor of the position sensor is coaxially driven with the motor shaft 54 ​​of the brake motor 50 or the drive shaft 63 of the reducer 60.

[0158] By utilizing the coordination of the stator and rotor of the position sensor, the rotation angle of the motor shaft 54 ​​of the brake motor 50 and the drive shaft 63 of the reducer 60 within the cavity of the housing 51 can be detected. The position sensor is also communicatively connected to the drive circuit on the circuit board 55. The drive circuit receives the angle signal detected by the position sensor, calculates the rotation angle of the rotor 53 in the brake motor 50, and then adjusts the braking force of the brake motor 50, that is, adjusts the braking force of the vehicle.

[0159] In one embodiment, the drive mechanism includes a locking mechanism. The locking mechanism is used to lock or release the motor shaft 54 ​​of the brake motor 50, or to lock or release the drive shaft 63 of the reducer 60, thus enabling the drive mechanism to also have a parking function. In one embodiment, the locking mechanism is partially fixed to the housing 51, and another part acts on the motor shaft 54 ​​of the brake motor 50 or the drive shaft 63 of the reducer 60. When the friction pad 21 of the electromechanical braking device 100 abuts against the brake disc 1002, the locking mechanism can lock the motor shaft 54 ​​of the brake motor 50 or the drive shaft 63 of the reducer 60 to maintain the abutment state of the friction pad 21 against the brake disc 1002. The brake disc 1002 no longer rotates, and the vehicle enters a parking state.

[0160] For the electromechanical braking device 100 of this application, a first clamp 31 and a second clamp 32 are arranged on both sides of the brake disc 1002 along the axial direction of the brake disc 1002. The first clamp 31 is used to mount the first friction plate 211, and the second clamp 32 is used to mount the second friction plate 212. At least one of the first clamp 31 and the second clamp 32 is used to accommodate a pressure sensor, which is used to detect the pressure of the first friction plate 211 or the second friction plate 212 to improve the braking force control accuracy of the brake motor 50.

[0161] In one embodiment, the first clamp 31 is used to accommodate the pressure sensor and the lead screw 41. The lead screw 41 along the axial direction of the brake disc 1002 is used to at least partially accommodate the pressure sensor, so as to reduce the axial dimension of the first clamp 31, reduce the overall axial dimension of the electromechanical braking device 100, and facilitate the arrangement of the wheel space of the vehicle.

[0162] In one embodiment, the second clamp 32 is used to house the pressure sensor, thereby simplifying the internal structure of the first clamp 31 and reducing its axial dimension. This also reduces the axial dimension of the electromechanical braking device 100 on the side closest to the first clamp 31, facilitating the arrangement of the vehicle's wheel space.

[0163] In one embodiment, the first clamp 31 and the second clamp 32 are respectively used to accommodate pressure sensors. The two pressure sensors are used to detect the pressure of the first friction plate 211 and the second friction plate 212 respectively. The two pressure sensors work together to improve the braking force control accuracy of the electromechanical braking device 100.

[0164] In one embodiment, the brake caliper 30 includes a first mounting surface 30a and a second mounting surface 30b. The first mounting surface 30a is located on a first caliper body 31, and the second mounting surface 30b is located on a second caliper body 32. Along the axial direction of the brake disc 1002, the first mounting surface 30a is the surface of the first caliper body 31 facing the second caliper body 32, and the second mounting surface 30b is the surface of the second caliper body 32 facing the first caliper body 31. The first mounting surface 30a is used to mount a first friction pad 211, and the second mounting surface 30b is used to mount a second friction pad 212.

[0165] Referring to Figure 6, the first mounting surface 30a includes a groove 35 for accommodating a pressure sensor. The pressure sensor accommodated within the groove 35 is used to detect the pressure exerted on the first friction plate 211. In one embodiment, the second mounting surface 30b includes a first receiving groove 34 for accommodating a portion of another pressure sensor. The pressure sensor partially accommodated within the first receiving groove 34 is used to detect the pressure exerted on the second friction plate 212.

[0166] It should be noted that the other pressure sensor and the first pressure sensor are named differently due to their different installation locations. In one embodiment, the measurement ranges of the two pressure sensors can be set differently. The electromechanical braking device 100 provided in this application includes one pressure sensor or another pressure sensor, which can be understood as the electromechanical braking device 100 provided in this application including pressure sensors with two different installation locations. In practical application scenarios, because the installation locations of the pressure sensors are different, the structures of one pressure sensor and the other pressure sensor can be adaptively adjusted without affecting the functional realization of the pressure sensors.

[0167] In this embodiment, the pressure sensor portion housed within the second clamp 32 is housed within the first receiving groove 34. This reduces the proportion of the pressure sensor housed within the second clamp 32 to the axial space of the second clamp 32, thereby compressing the axial dimension of the brake caliper 30 relative to the distal end of the brake motor 50. This reduces the axial dimension of the electromechanical braking device 100 on the side closer to the brake motor 50, making the electromechanical braking device 100 more compact and facilitating its miniaturization.

[0168] The groove 35 also serves to accommodate the lead screw 41, and the relative positional relationship between the lead screw 41 and the pressure sensor within the groove 35 is as follows: In one embodiment, see Figure 6. The axis of the lead screw 41 is parallel to the axis of the brake disc 1002, and the axis of the lead screw 41 coincides with the axis of the groove 35. Along the axial direction of the lead screw 41, the pressure sensor, accommodated within the groove 35, is arranged between the lead screw 41 and the bottom 351 of the groove 35 to detect the pressure on the first friction plate 211 through the reverse thrust of the first friction plate 211 on the lead screw 41.

[0169] In one embodiment, referring to FIG21, along the axial direction of the lead screw 41, the lead screw 41 includes two end faces, one end face being farther from any mounting surface than the other end face being farther from any mounting surface. For ease of description, along the axial direction of the lead screw 41, the end face of the lead screw 41 with a greater distance from any mounting surface is defined as the first end face 41a, and the end face of the lead screw 41 with a closer distance from any mounting surface is defined as the second end face 41b. The first end face 41a includes a second receiving groove 411 for accommodating a portion of another pressure sensor. Understandably, this application accommodates the pressure sensor portion within the first clamp 31 within the second receiving groove 411, which reduces the space occupied by the pressure sensor within the first clamp 31 in the axial direction of the lead screw 41. This reduces the axial dimension of the brake caliper 30 relative to the proximal end of the brake motor 50, thereby reducing the axial dimension of the electromechanical braking device 100 on the side near the brake motor 50. This makes the electromechanical braking device 100 more compact and facilitates its miniaturization.

[0170] That is, based on the above embodiments, the electromechanical braking device 100 of this application provides a receiving groove at the proximal or distal end of the brake caliper 30 relative to the brake motor 50, and a pressure sensor is partially accommodated in one receiving groove. This reduces the space occupied by the pressure sensor in the axial direction of the lead screw 41 while ensuring the braking reliability of the electromechanical braking device 100 using the pressure sensor. This compresses the axial dimension of the proximal end of the brake caliper 30 relative to the brake motor 50, making the electromechanical braking device 100 of this application compact and facilitating the miniaturization of the electromechanical braking device 100 of this application.

[0171] In one embodiment, the brake caliper 30 includes at least one clamp body for mounting two pressure sensors. Referring to Figure 6, the two pressure sensors are defined as a first pressure sensor 71a and a second pressure sensor 71b. The first pressure sensor 71a is used to detect the pressure exerted on at least one friction pad 21 during zero-point detection, and the second pressure sensor 71b is used to detect the pressure exerted by at least one friction pad 21 on a brake disc 1002 during braking.

[0172] During the operation of the electromechanical braking device 100 of this application, the electromechanical braking device 100 first drives the first friction pad 211 to slide towards the brake disc 1002. After the first friction pad 211 contacts the brake disc 1002, it then drives the first friction pad 211 to press against the brake disc 1002 to achieve the braking function of the first friction pad 211 against the brake disc 1002. Subsequently, as the braking process proceeds, the second friction pad 212 also slides towards the brake disc 1002 under the drive of the electromechanical braking device 100. After the second friction pad 212 contacts the brake disc 1002, it then drives the second friction pad 212 to press against the brake disc 1002 to achieve the braking function of the second friction pad 212 against the brake disc 1002.

[0173] That is, during braking, the brake motor 50 successively pushes the first friction pad 211 and the second friction pad 212 towards the brake disc 1002 until they contact the brake disc 1002. During the process of the electromechanical braking device 100 driving at least one friction pad 21 to brake one brake disc 1002, the electromechanical braking device 100 maintains pressure on at least one friction pad 21 at all times to avoid free travel that would lead to excessively long braking time. The electromechanical braking device 100 also needs to ensure that the initial pressure of at least one friction pad 21 is relatively small to avoid excessive braking force during braking. Control of the initial pressure is achieved through zero-point detection.

[0174] In one embodiment, zero-point detection can be performed as the brake motor 50 drives the friction pads 21 away from the brake disc 1002. As the brake motor 50 reverses to allow the two friction pads 21 to slide away from the brake disc 1002 along the axial direction of the lead screw 41, the two friction pads 21 separate away from each other along the axial direction of the brake disc 1002. At this time, the two friction pads 21 gradually move away from the brake disc 1002 under the action of components such as the return spring and the release spring 22. A first pressure sensor 71a can be used to detect the pressure on the friction pads 21 during this process to determine a preset pressure value. A preset pressure value is used to indicate that the pressure of the electromechanical braking device 100 on at least one friction pad 21 is greater than zero during braking. That is, the first pressure sensor 71a is used to ensure that the electromechanical braking device 100 maintains pressure on at least one friction pad 21.

[0175] During the release of the electromechanical braking device 100, i.e., the zero-point detection process described above, the pressure of the first pressure sensor 71a gradually decreases as the process progresses. When the first pressure sensor 71a detects that the pressure on at least one friction plate 21 is lower than a preset pressure value, the brake motor 50 stops working. This preset pressure value can also be used to indicate the initial relative angle between the stator 52 and the rotor 53 in the brake motor 50. During subsequent braking, the stator 52 drives the rotor 53 to rotate based on this relative angle to precisely control the braking force. In other words, when the pressure detected by the first pressure sensor 71a is lower than the preset pressure value, the relative position of the friction plate 21 and the brake disc 1002 is the zero point of the electromechanical braking device 100 of this application.

[0176] In one embodiment, the range of the first pressure sensor 71a is smaller than that of the second pressure sensor 71b. Because the range of the first pressure sensor 71a is relatively small, when the accuracy levels of the two pressure sensors with different ranges are the same or similar, the detection error range of the first pressure sensor 71a is smaller and its accuracy is relatively higher. When the first pressure sensor 71a is applied to the zero-point detection process of the electromechanical braking device 100 of this application, the detection result obtained is relatively accurate.

[0177] In one embodiment, zero-point detection can also be performed during the forward rotation of the brake motor 50, causing the two friction pads 21 to slide axially toward the brake disc 1002 along the lead screw 41. A first pressure sensor 71a is used to detect whether the initial pressure of at least one friction pad 21 is lower than a preset pressure value and greater than zero, thereby correcting the initial relative angle between the stator 52 and rotor 53 of the brake motor 50. For the electromechanical braking device 100, the selection of the zero point typically considers the axial distance between the friction pads 21 and the brake disc 1002. When the zero point is selected too early, the axial distance between the brake disc 1002 and the friction pads 21 is too large, requiring a longer time to brake the brake disc 1002 during the braking process of the electromechanical braking device 100, increasing the braking distance of the electromechanical braking device 100, and thus affecting the vehicle's braking distance. When the zero point selection is delayed, the axial distance between the brake disc 1002 and the friction pad 21 is too small, and the friction pad 21 contacts the brake disc 1002 too early, which will increase the braking force applied later. The friction pad 21 will rub against the brake disc 1002, thereby increasing the drag torque of the electromechanical braking device 100, increasing energy consumption, and affecting the normal driving range of the vehicle.

[0178] During vehicle operation, the axial distance between the brake disc 1002 and the friction pad 21 may change due to external impacts, wear of the friction pad 21 or the brake disc 1002, etc. During the operation of the electromechanical braking device 100 of this application, the pressure on the friction pad 21 is detected by the first pressure sensor 71a during zero-point detection, which facilitates real-time adjustment of the initial pressure of the brake motor 50 on the friction pad 21, so as to more accurately control the braking force during braking.

[0179] Therefore, by setting a first type of pressure sensor 71a with a smaller range, the detection accuracy of the electromechanical braking device 100 at the zero point can be improved, and the error between the pressure detected by the first type of pressure sensor 71a when the electromechanical braking device 100 is at the zero point and the preset pressure value can be reduced, thereby improving the braking accuracy of the electromechanical braking device 100.

[0180] The second type of pressure sensor 71b is used to detect the braking force throughout the braking process. Since the two friction pads 21 of the electromechanical braking device 100 are typically subjected to significant pressure during braking, providing a second type of pressure sensor 71b with a larger range enables it to detect the braking force throughout the entire braking process and feed it back to the brake motor 50 to adjust the output torque of the brake motor 50, thereby ensuring the braking reliability of the electromechanical braking device 100.

[0181] In one embodiment, the range of the first pressure sensor 71a is less than 100N.

[0182] In one embodiment, the second pressure sensor 71b has a range greater than 60 kN.

[0183] In one embodiment, one of the clamps is used to mount a friction plate 21 and to accommodate at least one first pressure sensor 71a. The first first pressure sensor 71a is arranged along the axial direction of a brake disc 1002 on the side of the friction plate 21 away from the brake disc 1002, and the first first pressure sensor 71a is used to detect the pressure applied to the friction plate 21.

[0184] Figure 6 is a cross-sectional schematic diagram of the electromechanical braking device 100 provided in this application. As shown in Figure 6, the second clamp 32 is used to mount the second friction plate 212 and to accommodate a first pressure sensor 71a. The axis of the first pressure sensor 71a coincides with the axis of the lead screw 41. Along the axial direction of the lead screw 41, the first pressure sensor 71a is arranged on the side of the second friction plate 212 away from the first friction plate 211. The first pressure sensor 71a is used to detect the pressure on the second friction plate 212 during zero-point detection. The first pressure sensor 71a is also used to electrically connect to the drive circuit of the circuit board 55.

[0185] During the zero-point detection process of the electromechanical braking device 100, when the brake motor 50 drives the brake caliper 30 and the second friction plate 212, the first pressure sensor 71a is used to detect the pressure on the second friction plate 212. The first pressure sensor 71a transmits the detection signal to the drive circuit, and the drive circuit adjusts the initial relative angle between the stator 52 and the rotor 53 of the brake motor 50 based on the detection signal.

[0186] As shown in Figure 7, the first clamp 31 is used to mount the first friction plate 211 and to accommodate a first pressure sensor 71a. The axis of the first pressure sensor 71a coincides with the axis of the lead screw 41. Along the axial direction of the lead screw 41, the second friction plate 212, the first friction plate 211, the lead screw 41, and the first pressure sensor 71a are arranged sequentially. The first pressure sensor 71a is used to detect the pressure exerted on the first friction plate 211 during zero-point detection.

[0187] Therefore, the first pressure sensor 71a can be installed in either the first clamp 31 or the second clamp 32. Correspondingly, the first pressure sensor 71a is used to detect the pressure experienced by a friction plate 21 installed in the same clamp during zero-point detection to achieve the detection function. In subsequent embodiments of this application, the first pressure sensor 71a is installed in the second clamp 32.

[0188] In one embodiment, the second clamp 32 is further configured to accommodate at least one elastic element 80, each elastic element 80 being configured to cushion the reverse pressure of the second friction plate 212 on a first pressure sensor 71a. Specifically, along the axial direction of a brake disc 1002, an elastic element 80 is arranged abutting against either the side of a first pressure sensor 71a facing the second clamp 32 or the side facing the second friction plate 212.

[0189] Figure 8 is a cross-sectional structural diagram of the internal components of the second clamp 32 in one embodiment of the electromechanical braking device 100 provided in this application. As shown in Figure 8, the electromechanical braking device 100 of this application also includes an elastic element 80, and the second mounting surface 30b of the second clamp 32 also includes a first receiving groove 34, in which the elastic element 80 is received. The axis of the elastic element 80 coincides with the axis of the lead screw 41. Along the axial direction of the lead screw 41, the elastic element 80 is used to abut against the bottom 341 of the first receiving groove 34 and the first pressure sensor 71a, so as to buffer the reverse pressure of the second friction plate 212 on the first pressure sensor 71a during braking, and avoid damage to the first pressure sensor 71a that may be caused by excessive reverse pressure of the second friction plate 212. Thus, the first pressure sensor 71a is protected.

[0190] Figure 9 is a cross-sectional schematic diagram of the internal components of the second clamp 32 in the electromechanical braking device 100 provided in this application. As shown in Figure 9, the electromechanical braking device 100 of this application also includes an elastic element 80, the axis of which coincides with the axis of the lead screw 41. Along the axial direction of the lead screw 41, one end of the elastic element 80 is used to abut against the side of the first pressure sensor 71a facing the second friction plate 212, and the other end extends toward the second friction plate 212 to buffer the reverse pressure of the first pressure sensor 71a on the second friction plate 212 during braking, and to avoid damage to the first pressure sensor 71a that may be caused by excessive reverse pressure from the second friction plate 212. This protects the first pressure sensor 71a.

[0191] In one embodiment, the second clamp 32 includes a first receiving groove 34 and a slider 90. The first receiving groove 34 is used to receive a first type of pressure sensor 71a. A slider 90 is arranged between a first type of pressure sensor 71a and a second friction plate 212 along the axial direction of a brake disc 1002. The opening 342 of the first receiving groove 34 faces the second friction plate 212 and is used to receive a portion of the slider 90. The second friction plate 212 is used to fixally connect another portion of the slider 90.

[0192] That is, the second mounting surface 30b also includes a first receiving groove 34, which is used to receive a first type of pressure sensor 71a and one end of a slider 90. The other end of the slider 90 is used to fix the second friction plate 212. The first type of pressure sensor 71a is arranged between a slider 90 and the bottom 341 of the first receiving groove 34.

[0193] Figure 10 is a schematic diagram of the external structure of the sliding member 90 of the electromechanical braking device 100 provided in this application. As shown in Figure 10, the electromechanical braking device 100 of this application also includes a sliding member 90, the axis of which coincides with the axis of the lead screw 41. Along the axial direction of the lead screw 41, one end of the sliding member 90 is accommodated in the first receiving groove 34, and the other end is used to fix the second friction plate 212. That is, along the axial direction of the lead screw 41, the bottom 341 of the first receiving groove 34, the first pressure sensor 71a, the sliding member 90, and the second friction plate 212 are arranged in sequence.

[0194] The slider 90 is used to slide the brake caliper 30 to achieve a sliding connection between the second friction pad 212 and the brake caliper 30. Understandably, when the braking force transmitted to the lead screw 41 causes the brake caliper 30 to slide, the brake caliper 30 can push the second friction pad 212 towards the brake disc 1002. At this time, a first pressure sensor 71a, abutting between the bottom 341 of the first receiving groove 34 and the slider 90, is used to push the slider 90 and the second friction pad 212 to slide with the brake caliper 30. The first pressure sensor 71a is used to detect the pressure exerted by the electromechanical braking device 100 on the second friction pad 212. After the second friction pad 212 contacts the brake disc 1002, the two opposite ends of the second friction pad 212 abut against the brake disc 1002 and the brake caliper 30 respectively. The braking force released by the brake motor 50 increases the friction between the second friction pad 212 and the brake disc 1002, while the reverse thrust on the second friction pad 212 increases. The elastic element 80 is used to buffer this part of the reverse thrust.

[0195] During the release of the brake, as the brake motor 50 rotates in the opposite direction, the first friction pad 211 and the second friction pad 212 are subjected to the elastic force of the release spring 22 and the return spring in the axial direction of the lead screw 41. For the second friction pad 212, the elastic force of the release spring 22 and the return spring causes the second friction pad 212 to slide towards the first pressure sensor 71a via the sliding member 90 while moving away from the brake disc 1002, and be detected by the first pressure sensor 71a. On the other hand, by arranging the first pressure sensor 71a on the side of the brake disc 1002 away from the brake motor 50, the axial dimension of the brake caliper 30 near the brake motor 50 can be compressed. For the vehicle, since the brake caliper 30 of the electromechanical braking device 100 has the side with the brake motor 50 located axially inside the wheel 1001, it is understandable that arranging the first pressure sensor 71a on the side of the brake disc 1002 away from the brake motor 50 can make reasonable use of the wheel-side space of the vehicle.

[0196] In one embodiment, the second friction plate 212 is made of a non-metallic material. In another embodiment, the second friction plate 212 is made of diamond. In another embodiment, both the sliding member 90 and the second friction plate 212 are made of metallic materials. In yet another embodiment, the sliding member 90 and the second friction plate 212 are made of the same material and are integrally formed.

[0197] In one embodiment, a first receiving groove 34 includes a first segment 34a and a second segment 34b connected together. Along the axial direction of a brake disc 1002, the first segment 34a is positioned on the side of the second segment 34b away from a second friction plate 212, and the first segment 34a is used to receive a first pressure sensor 71a. Along the radial direction of a brake disc 1002, the size of the first segment 34a is smaller than the size of the second segment 34b and smaller than the maximum width of a slider 90.

[0198] In one embodiment, the axis of the first receiving groove 34 coincides with the axis of the lead screw 41. The size of the first segment 34a of the first receiving groove 34 is smaller than the size of the second segment 34b of the first receiving groove 34. Along the axial direction of the lead screw 41, an abutment surface 344 facing the second friction plate 212 is formed at the junction of the first segment 34a and the second segment 34b.

[0199] In this embodiment, the slider 90 can slide along the axial direction of the lead screw 41 within the second section 34b, causing the second friction plate 212 to also slide along the axial direction of the lead screw 41. During the braking process of the electromechanical braking device 100, the axial thrust on the second friction plate 212 causes the slider 90 to slide towards the first pressure sensor 71a, and pushes the first pressure sensor 71a towards the bottom 341 of the first receiving groove 34. The abutment surface 344 can be used to limit the distance the slider 90 slides towards the first pressure sensor 71a, protecting the first pressure sensor 71a from pressure exceeding its tolerance range.

[0200] In one embodiment, the slider 90 includes a third segment 91 and a fourth segment 92 connected together. Both the third segment 91 and the fourth segment 92 are annular, and the axes of both segments coincide with the axis of the lead screw 41. The outer diameter of the third segment 91 is smaller than the outer diameter of the fourth segment 92, such that a mating surface 93, opposing the second friction plate 212, is formed at the junction of the third segment 91 and the fourth segment 92 along the axial direction of the lead screw 41.

[0201] As shown in Figure 8, along the axial direction of the lead screw 41, the third segment 91 is farther away from the second friction plate 212 than the fourth segment 92. The third segment 91 is at least partially accommodated in the first segment 34a of the first receiving groove 34, and the fourth segment 92 is at least partially accommodated in the second segment 34b of the first receiving groove 34.

[0202] In this embodiment, the electromechanical braking device 100 of this application can limit the displacement of the sliding member 90 toward the first segment 34a by the cooperation relationship between the mating surface 93 of the sliding member 90 and the abutment surface 344. This ensures that the data detected by the first pressure sensor 71a is within the range of the first pressure sensor 71a when the mating surface 93 contacts the abutment surface 344. This avoids the first pressure sensor 71a from exceeding its range due to excessive pressure on the second friction plate 212 during braking, thereby protecting the first pressure sensor 71a.

[0203] In one embodiment, a first receiving groove 34 is also used to at least partially receive an elastic member 80, the length of which along the axial direction of a brake disc 1002 is less than the sum of the length of a first pressure sensor 71a and the natural length of an elastic member 80.

[0204] As shown in Figure 8, the axis of the elastic element 80 coincides with the axis of the lead screw 41, and the elastic element 80 is accommodated within the first section 34a of the first receiving groove 34. Along the axis of the lead screw 41, the elastic element 80 serves to abut against the bottom 341 of the first receiving groove 34 and the first type of pressure sensor 71a. When the elastic element 80 is not subjected to axial pressure, the first type of pressure sensor 71a and the elastic element 80, which are arranged in abutment, can extend out of the first section 34a of the first receiving groove 34 to ensure reliable contact between the end of the first type of pressure sensor 71a facing away from the elastic element 80 and the sliding member 90, thereby ensuring that the first type of pressure sensor 71a can detect the pressure of the second friction plate 212.

[0205] During the braking process of the electromechanical braking device 100 of this application, the axial thrust on the second friction plate 212 causes the sliding member 90 to slide towards the first pressure sensor 71a, and compresses the elastic member 80 by pushing the first pressure sensor 71a towards the bottom 341 of the first receiving groove 34. Along the axial direction of the lead screw 41, due to the support provided by the elastic member 80, the sliding member 90, together with the first pressure sensor 71a, achieves axial limitation, so that the first pressure sensor 71a can obtain the pressure on the second friction plate 212.

[0206] After the elastic element 80 is subjected to pressure transmitted by the sliding element 90, the sliding element 90 pushes the first pressure sensor 71a back into the first segment 34a by compressing the elastic element 80, thereby preventing the first pressure sensor 71a from bearing greater pressure.

[0207] In one embodiment, when the slider 90 includes a third segment 91, the length of a first receiving groove 34 along the axial direction of a brake disc 1002 is less than the sum of the length of a first pressure sensor 71a, the length of the third segment 91, and the natural length of an elastic member 80.

[0208] The dimensions of the first receiving groove 34, the first type of pressure sensor 71a, the elastic element 80, and the sliding element 90 in the above embodiments are respectively used to ensure the sliding connection between the sliding element 90 and the second clamp 32 during the use of the electromechanical braking device 100 in different embodiments of this application. This ensures the pressure detection function of the first type of pressure sensor 71a on the second friction plate 212.

[0209] In one embodiment, the electromechanical braking device 100 includes two first pressure sensors 71a mounted on the same clamp body. The two first pressure sensors 71a are spaced apart between a clamp body and a friction plate along the axial direction of a brake disc 1002.

[0210] In one embodiment, the second mounting surface 30b includes two first receiving grooves 34, which are respectively used to receive two first pressure sensors 71a.

[0211] Figure 11 is a partially enlarged cross-sectional view of the internal components of the second clamp 32 in the electromechanical braking device 100 provided in this application. As shown in Figure 11, the second mounting surface 30b includes two first receiving grooves 34, which are arranged radially along the brake disc 1002. There are two first pressure sensors 71a, each of which is housed in one of the first receiving grooves 34. In one embodiment, as shown in Figure 11, the sliding member 90 and the second friction plate 212 are configured as an integral structure.

[0212] Understandably, the arrangement of two first receiving slots 34 on the second mounting surface 30b for accommodating two first pressure sensors 71a respectively ensures that two first pressure sensors 71a with smaller ranges are provided at the far end of the brake caliper 30 relative to the brake motor 50, so that the two first pressure sensors 71a can cooperate with each other, thereby further improving the detection accuracy of the zero point of the electromechanical braking device 100 of this application.

[0213] In one embodiment, along the arrangement direction of the two first receiving grooves 34 in the second mounting surface 30b, the interval between the two first receiving grooves 34 is greater than the outer diameter of a lead screw 41 and less than the length of the second friction plate 212. That is, along the arrangement direction of the two first receiving grooves 34, the distance between the two first receiving grooves 34 is greater than the outer diameter of the lead screw 41 and less than the length of the second friction plate 212.

[0214] The braking force of the brake motor 50 is transmitted to the friction plate 21 through the interaction of the lead screw 41 and the sleeve 42. To increase the contact area between the friction plate 21 and the brake disc 1002 during braking, the length of the friction plate 21 is greater than the outer diameter of the lead screw 41 along its radial direction. Understandably, during operation of the electromechanical braking device 100, uneven thrust may occur as the lead screw 41 pushes the friction plate 21.

[0215] In this embodiment, the two first receiving grooves 34 are arranged at intervals along the length of the friction plate 21, so that the two second type of pressure sensors 71b contained in the two first receiving grooves 34 can be arranged on both sides of the lead screw 41 radially, so as to realize the pressure detection of the second friction plate 212 in two separate areas, eliminate the deviation of the detection data that may be caused by the second friction plate 212 being subjected to force on one side, and further improve the detection accuracy of the zero point of the electromechanical braking device 100 of this application.

[0216] In one embodiment, the distance between the two first pressure sensors 71a is greater than the outer diameter of either first pressure sensor 71a along the radial direction of a brake disc 1002.

[0217] As shown in Figure 11, the length of the second friction plate 212 is greater than the length of the first pressure sensor 71a along the radial direction of the lead screw 41. It can be understood that setting the distance between the two first pressure sensors 71a to be greater than their outer diameter along the radial direction of the lead screw 41 increases the distance between them, resulting in a greater interval between the pressure regions detected by the two first pressure sensors 71a on the second friction plate 212. This further eliminates the deviation in detection data that may be caused by unilateral force on the second friction plate 212. This further improves the zero-point detection accuracy of the electromechanical braking device 100 of this application.

[0218] In one embodiment, two first pressure sensors 71a are symmetrically distributed along the center of the second friction plate 212.

[0219] Since each of the first type of pressure sensors 71a abuts against the bottom 341 of the corresponding first receiving groove 34 via the elastic member 80, it is understandable that arranging the two first type of pressure sensors 71a radially on both sides of the center of the second friction plate 212 along the brake disc 1002 can avoid the phenomenon of radial displacement of the sliding member 90 due to unilateral force when the second friction plate 212 pushes the sliding member 90. This further eliminates the deviation of the detection data that may be caused by unilateral force on the second friction plate 212, and improves the detection accuracy of the zero point of the electromechanical braking device 100 of this application.

[0220] In one embodiment, the bottom 341 of the first receiving groove 34 includes a protrusion 345 extending from the bottom 341 of the first receiving groove 34 toward the opening 342 of the first receiving groove 34. The outer diameter of the protrusion 345 is less than or equal to the inner diameter of the first pressure sensor 71a.

[0221] Figure 12 is a cross-sectional schematic diagram of the internal components of the second clamp 32 in the electromechanical braking device 100 provided in this application. As shown in Figure 12, the first pressure sensor 71a is annular, and the axis of the first pressure sensor 71a coincides with the axis of the lead screw 41. Along the axial direction of the lead screw 41, the first pressure sensor 71a is arranged between the bottom 341 of the first receiving groove 34 and the second friction plate 212.

[0222] The axis of the first receiving groove 34 coincides with the axis of the lead screw 41. Along the axial direction of the lead screw 41, a protrusion 345 extends from the bottom 341 of the first receiving groove 34 towards the opening 342 of the first receiving groove 34, and the axis of the protrusion 345 coincides with the axis of the lead screw 41. A first pressure sensor 71a is sleeved on the protrusion 345 of the first receiving groove 34 to facilitate radial positioning of the first pressure sensor 71a within the first receiving groove 34.

[0223] In one embodiment, a first pressure sensor 71a is sleeved on a protrusion 345, one side of the first pressure sensor 71a directly abuts against the bottom 341 of the first receiving groove 34, and the other side of the first pressure sensor 71a directly abuts against a sliding member 90. In another embodiment, as shown in FIG12, the sliding member 90 and the second friction plate 212 are configured as an integral structure.

[0224] As shown in Figure 12, the inner circumferential surface of the first pressure sensor 71a abuts against the outer circumferential surface of the protrusion 345. Understandably, the first pressure sensor 71a achieves radial positioning by abutting against the outer circumferential surface of the protrusion 345, preventing the first pressure sensor 71a from shifting radially along the lead screw 41 under external impact. This ensures the relative position between the outer circumferential surface of the first pressure sensor 71a and the groove wall 343 of the first receiving groove 34, reducing the impact of external impacts on the detection data of the first pressure sensor 71a. This ensures the detection accuracy of the first pressure sensor 71a.

[0225] On the other hand, by abutting the inner peripheral surface of the first pressure sensor 71a against the outer peripheral surface of the protrusion 345, the inner diameter of the first pressure sensor 71a can be reduced, thereby reducing the radial dimension of the first pressure sensor 71a. This is beneficial for miniaturizing the electromechanical braking device 100 of this application.

[0226] In this embodiment, along the axial direction of the lead screw 41, the two sides of the first pressure sensor 71a respectively abut against the bottom 341 of the first receiving groove 34 and the second friction plate 212 to achieve axial positioning of the first pressure sensor 71a. The axial dimension of the first pressure sensor 71a in the clamp body is small, which is beneficial to reducing the overall axial dimension of the electromechanical braking device 100 and facilitating the arrangement of the wheel side space.

[0227] In one embodiment, along the axial direction of the lead screw 41, the length of a protrusion 345 is less than or equal to the thickness of the first pressure sensor 71a.

[0228] As shown in Figure 12, the protrusion 345 is recessed relative to the bottom 341 of the first receiving groove 34 relative to the first pressure sensor 71a. This ensures radial positioning of the first pressure sensor 71a while preventing the protrusion 345 from abutting against the second friction plate 212 and affecting the pressure detection of the first pressure sensor 71a. This guarantees the pressure detection of the second friction plate 212 by the first pressure sensor 71a within the electromechanical braking device 100 of this application.

[0229] In one embodiment, the first pressure sensor 71a includes another axial protrusion that is embedded in the bottom of a second receiving groove along the axial direction of a lead screw 41. The axial protrusion of the first pressure sensor 71a is defined as the first axial protrusion 711a.

[0230] Figure 13 is a schematic diagram of the external structure of the first type of pressure sensor 71a of the electromechanical braking device 100 provided in this application, and Figure 14 is a schematic diagram of the external structure of the first type of pressure sensor 71a of the electromechanical braking device 100 provided in this application in one embodiment. Specifically, the first type of pressure sensor 71a shown in Figure 13 is the same as the first type of pressure sensor 71a shown in Figure 12. The first type of pressure sensor 71a shown in Figure 14 is the same as the first type of pressure sensor 71a shown in Figure 8.

[0231] As shown in Figures 13 and 14, the first pressure sensor 71a has a first axial protrusion 711a on the side opposite to the brake disc 1002. The first axial protrusion 711a is used to embed into the bottom 341 of the first receiving groove 34. The pressure detection device inside the first pressure sensor 71a can be partially accommodated within the internal cavity of the first axial protrusion 711a. In other words, the interior of the first axial protrusion 711a can be used to accommodate the internal device of the first pressure sensor 71a. The first axial protrusion 711a can further reduce the axial space occupied by the first pressure sensor 71a in the brake caliper 30, thereby compressing the axial dimension of the brake caliper 30, which is beneficial to the miniaturization of the electromechanical braking device 100 of this application.

[0232] In one embodiment, at least one of the clamps is used to mount a friction plate 21 and to accommodate a second pressure sensor 71b. The second pressure sensor 71b is arranged along the axial direction of a brake disc 1002 on the side of the friction plate 21 away from the brake disc 1002, and is used to detect the pressure exerted by the friction plate 21 against one side of the brake disc 1002.

[0233] In one embodiment, the first clamp 31 is used to mount the first friction plate 211 and to accommodate a second pressure sensor 71b. The axis of the second pressure sensor 71b coincides with the axis of the lead screw 41. Along the axial direction of the lead screw 41, the second pressure sensor 71b is arranged on the side of the lead screw 41 away from the first friction plate 211. The second pressure sensor 71b is used to detect the pressure exerted by the first friction plate 211 on the side of the brake disc 1002 during braking. The second pressure sensor 71b is also used to electrically connect to the drive circuit of the circuit board 55.

[0234] During the operation of the electromechanical braking device 100, when the braking force output by the brake motor 50 is transmitted to the first friction plate 211 via the reducer 60, lead screw 41, and screw sleeve 42, the lead screw 41 can also transmit the reverse thrust to the second pressure sensor 71b, where it is detected. The second pressure sensor 71b transmits the detection signal to the drive circuit, which adjusts the output torque of the brake motor 50 based on the detection signal.

[0235] On the other hand, during the operation of the electromechanical braking device 100, while the sleeve 42 pushes the first friction plate 211 to slide towards the brake disc 1002, the release spring 22 between the first friction plate 211 and the second friction plate 212 is axially compressed along the axis of the lead screw 41. The release spring 22 applies an axial thrust to the sleeve 42, and this axial thrust prevents the first friction plate 211 from contacting the brake disc 1002. At this time, the second pressure sensor 71b can also detect the elastic force provided by the release spring 22. This elastic force, in conjunction with the braking force transmitted by the lead screw 41, enables the detection of the pressure on the first friction plate 211.

[0236] In other words, the setting of the second pressure sensor 71b enables real-time detection of the pressure of the first friction pad 211 pressing against the brake disc 1002 during braking, avoiding a mismatch between the braking force output by the brake motor 50 and the actual braking effect. This achieves the braking force feedback function of the electromechanical braking device 100 of this application, ensuring the braking reliability of the electromechanical braking device 100.

[0237] In one embodiment, the second clamp 32 is used to mount the second friction plate 212 and to accommodate a second pressure sensor 71b. The axis of the second pressure sensor 71b coincides with the axis of the lead screw 41. Along the axial direction of the lead screw 41, the second pressure sensor 71b is arranged on the side of the second friction plate 212 away from the first friction plate 211, and is used to detect the pressure exerted by the second friction plate 212 on the side pressing against the brake disc 1002 during braking.

[0238] The second type of pressure sensor 71b is also used to electrically connect the drive circuit of the circuit board 55 to realize real-time detection of the braking process, avoiding the situation where the braking force output by the brake motor 50 does not match the actual braking effect. This realizes the power feedback function of the electromechanical braking device 100 of this application, ensuring the braking reliability of the electromechanical braking device 100 of this application.

[0239] Based on the two embodiments described above, the second pressure sensor 71b can be installed inside the first clamp 31 or the second clamp 32. Correspondingly, the second pressure sensor 71b is used to detect the pressure of a friction plate 21 installed in the same clamp during braking to achieve the braking force detection function. In subsequent embodiments of this application, the second pressure sensor 71b is installed inside the first clamp 31.

[0240] In one embodiment, the electromechanical braking device 100 includes a lead screw 41, a first clamp 31 for accommodating the lead screw 41 and a second pressure sensor 71b, and the lead screw 41 for driving a first friction plate 211. The lead screw 41 is positioned between a second friction plate 212 and a second pressure sensor 71b along the axial direction of a brake disc 1002.

[0241] Figure 15 is a partial structural diagram of the internal components of the first clamp 31 in the electromechanical braking device 100 provided in this application. As shown in Figure 15, the axis of the lead screw 41 is parallel to the axis of the brake disc 1002, and the axis of the second pressure sensor 71b coincides with the axis of the lead screw 41. Along the axial direction of the lead screw 41, the second friction plate 212, the first friction plate 211, the lead screw 41, and the second pressure sensor 71b are arranged sequentially. It can be understood that during the braking process of the electromechanical braking device 100 in this application, the braking force of the brake motor 50 is transmitted to the lead screw 41. Based on the braking force of the brake motor 50, the lead screw 41 drives the first friction plate 211 to slide, and transmits the pressure received by the first friction plate 211 pressing against the brake disc 1002 to the second pressure sensor 71b. This realizes the pressure of the second pressure sensor 71b on one side of the first friction plate 211 pressing against the brake disc 1002 during the braking process.

[0242] In one embodiment, the first clamp 31 is also used to accommodate a thrust bearing 72, which is arranged along the axial direction of a brake disc 1002 between a lead screw 41 and a second pressure sensor 71b.

[0243] Figure 16 is a partially enlarged cross-sectional view of the internal components of the first clamp 31 in the electromechanical braking device 100 provided in this application. As shown in Figure 16, the electromechanical braking device 100 of this application also includes a thrust bearing 72. The axis of the thrust bearing 72 and the axis of the second pressure sensor 71b are both coincident with the axis of the lead screw 41. Along the axial direction of the lead screw 41, the thrust bearing 72 is arranged between the end face of the lead screw 41 and the second pressure sensor 71b. The thrust bearing 72 is used to bear the reverse thrust of the first friction plate 211 acting on the lead screw 41.

[0244] During the braking process of the electromechanical braking device 100 of this application, while the first friction plate 211 slides towards the brake disc 1002 under the action of the lead screw 41 and the sleeve 42, the release spring 22 also applies a reverse thrust to the first friction plate 211 based on its own compression. This reverse thrust acts on the thrust bearing 72. While bearing this reverse thrust, the thrust bearing 72 also transmits the reverse thrust to the second pressure sensor 71b, so that the second pressure sensor 71b can regulate the output torque of the brake motor 50.

[0245] In this embodiment, along the axial direction of the lead screw 41, one side of the thrust bearing 72 is used to rotate with the lead screw 41 within the brake caliper 30, while the other side of the thrust bearing 72 remains stationary relative to the second pressure sensor 71b.

[0246] Figure 17 is a schematic diagram of the external structure of the thrust bearing 72 of the electromechanical braking device 100 provided in this application, and Figure 18 is a partial cross-sectional schematic diagram of the internal components of the first clamp 31 in the electromechanical braking device 100 provided in this application.

[0247] As shown in Figures 17 and 18, the thrust bearing 72 includes a first shaft ring 721 and a second shaft ring 722. The axes of the first shaft ring 721 and the second shaft ring 722 both coincide with the axis of the lead screw 41, and the first shaft ring 721 and the second shaft ring 722 are rotatably connected. Along the axial direction of the lead screw 41, the first shaft ring 721 is farther away from the second pressure sensor 71b than the second shaft ring 722.

[0248] Along the axial direction of the lead screw 41, a first bearing ring 721 is used to fix the lead screw 41 in place, and a second bearing ring 722 is used to support the surface of the second pressure sensor 71b away from the brake motor 50. When the brake motor 50 is working, the lead screw 41 rotates relative to the brake caliper 30 under the braking force of the brake motor 50, and drives the first bearing ring 721 to rotate. At this time, the second bearing ring 722 remains stationary relative to the second pressure sensor 71b.

[0249] That is, the thrust bearing 72 ensures that the axial thrust acting on the lead screw 41 is transmitted to the second pressure sensor 71b, while avoiding the situation where the torque of the lead screw 41 is transmitted to the second pressure sensor 71b and affects the detection data of the second pressure sensor 71b. This ensures that the second pressure sensor 71b remains relatively stationary during the operation of the electromechanical braking device 100 of this application.

[0250] On the other hand, the installation of the thrust bearing 72 also reduces the friction between the second pressure sensor 71b and the lead screw 41, avoids frictional loss of the second pressure sensor 71b, ensures the service life of the second pressure sensor 71b, improves the detection accuracy of the second pressure sensor 71b in this application, and thus improves the braking accuracy of the electromechanical braking device 100 in this application.

[0251] In one embodiment, along the radial direction of a brake disc 1002, the outer diameter of a thrust bearing 72 is larger than the inner diameter of a second type of pressure sensor 71b, smaller than the outer diameter of a lead screw 41, and smaller than the outer diameter of the second type of pressure sensor 71b. The dimensional settings of the thrust bearing 72 and the lead screw 41 prevent the outer diameter of the thrust bearing 72 from being too large, which would affect the sliding stroke of the threaded sleeve 42. This ensures the sliding stroke of the threaded sleeve 42 pushing the friction plate 21, thus guaranteeing the braking effect of the electromechanical braking device 100 of this application.

[0252] On the other hand, the size settings of the thrust bearing 72 and the second pressure sensor 71b ensure that the projection of the thrust bearing 72 on the second pressure sensor 71b is contained within the second pressure sensor 71b along the axial direction of the lead screw 41, thereby ensuring the supporting effect of the thrust bearing 72 on the second pressure sensor 71b and reliably transmitting the axial thrust received by the lead screw 41 to the second pressure sensor 71b.

[0253] In one embodiment, the electromechanical braking device 100 includes a drive shaft 43. The drive shaft 43 is used to receive drive from the motor shaft 54 ​​of a brake motor 50. A first clamp 31 is used to fix the brake motor 50, and the drive shaft 43 is used to drively connect a lead screw 41 and the brake motor 50. A second pressure sensor 71b is arranged between the lead screw 41 and the brake motor 50 along the axial direction of a brake disc 1002.

[0254] Figure 19 is a schematic diagram of the external structure of the lead screw 41 of the electromechanical braking device 100 provided in this application. As shown in Figure 19, the axis of the transmission shaft 43 coincides with the axis of the lead screw 41. The transmission shaft 43 is used to drive the brake motor 50 and the lead screw 41. Along the axial direction of the lead screw 41, one end of the transmission shaft 43 is fixed relative to the lead screw 41 in the circumferential direction, and the other end extends out of the first clamp body 31 and is drively connected to the motor shaft 54 ​​of the brake motor 50. In the schematic diagram of Figure 3, the transmission shaft 43 extends into the housing 51 of the brake motor 50 and is coaxially driven with the drive shaft 63 of the reducer 60. The braking force output by the motor shaft 54 ​​of the brake motor 50 can be transmitted from the drive shaft 63 to the transmission shaft 43 via the reducer 60, thereby driving the lead screw 41 to rotate.

[0255] In one embodiment, the electromechanical braking device 100 includes a drive shaft 43 for receiving drive from the motor shaft 54 ​​of a brake motor 50. The lead screw 41 has an internal spline on its end face facing the brake motor 50 along its axial direction, and this internal spline is used to couple the external spline of the drive shaft 43.

[0256] In one embodiment, a second pressure sensor 71b is sleeved around a drive shaft 43 along the radial direction of a brake disc 1002. That is, the second pressure sensor 71b is used to be sleeved around the outer peripheral surface of a drive shaft 43 along the radial direction of a lead screw 41 and abuts against the outer peripheral surface of the drive shaft 43.

[0257] As shown in Figure 15, the second type of pressure sensor 71b is annular. The geometric axis of the second type of pressure sensor 71b coincides with the axis of the lead screw 41. Understandably, the inner circumferential surface of the second type of pressure sensor 71b is radially positioned by abutting against the outer circumferential surface of a transmission shaft 43. This avoids the radial movement of the second type of pressure sensor 71b along the lead screw 41 under external impact, ensuring the relative position between the outer circumferential surface of the second type of pressure sensor 71b and the groove wall 353 of the groove 35 of the brake caliper 30. This reduces the impact of external impact on the detection data of the second type of pressure sensor 71b, thereby ensuring the detection accuracy of the second type of pressure sensor 71b.

[0258] On the other hand, by abutting the inner circumferential surface of the second pressure sensor 71b against the outer circumferential surface of the drive shaft 43, the radial dimension of the second pressure sensor 71b can be reduced. This is beneficial for miniaturizing the electromechanical braking device 100 of this application.

[0259] In one embodiment, the brake caliper 30 includes a groove 35 and a through hole 36. The groove 35 is used to accommodate a lead screw 41, a screw sleeve 42, and a second pressure sensor 71b. The through hole 36 extends through the bottom 351 of the groove 35 along the axial direction of the lead screw 41. The through hole 36 is used to accommodate a drive shaft 43 through which it passes.

[0260] Figure 20 is a partial cross-sectional view of the first caliper 31 of the electromechanical braking device 100 provided in this application. As shown in Figure 20, a groove 35 is provided on the first mounting surface 30a of the brake caliper 30. The groove 35 extends along the axial direction of the lead screw 41 toward the brake motor 50, and the axis of the groove 35 coincides with the axis of the lead screw 41. One end of the through hole 36 is used to connect the groove 35, and the other end is used to extend along the axial direction of the lead screw 41 toward the brake motor 50. The through hole 36 penetrates the brake caliper 30, and the axis of the through hole 36 coincides with the axis of the lead screw 41. That is, the groove opening 352 of the groove 35 is away from the brake motor 50 along the axial direction of the lead screw 41, and the through hole 36 is provided at the bottom 351 of the groove 35.

[0261] The groove 35 accommodates the lead screw 41, and one end of the drive shaft 43 is located outside the groove 35 for transmission connection with the brake motor 50. The other end of the drive shaft 43 extends into the groove 35 through the through hole 36 along the axial direction of the lead screw 41, for fixed connection with the lead screw 41 accommodated in the groove 35. That is, the drive shaft 43 is used to transmit power between the lead screw 41 and the brake motor 50 through the through hole 36, so that the braking force of the brake motor 50 can be transmitted to the lead screw 41 in the groove 35 via the drive shaft 43, thereby ensuring the braking function of the electromechanical braking device 100 of this application.

[0262] In one embodiment, along the radial direction of a lead screw 41, the diameter of a through hole 36 is greater than or equal to the outer diameter of a drive shaft 43 and less than the outer diameter of a second pressure sensor 71b. The axis of the drive shaft 43 coincides with the axis of the lead screw 41. It is understood that providing a through hole 36 with a diameter greater than or equal to the outer diameter of the drive shaft 43 ensures that the drive shaft 43 can pass through the through hole 36 and extend into the groove 35 along the axial direction of the lead screw 41, ensuring the transmission connection between the drive shaft 43 and the lead screw 41 and the brake motor 50, and ensuring the braking function of the electromechanical braking device 100 of this application. The inner diameter of the second pressure sensor 71b can be equal to the outer diameter of the drive shaft 43. The inner wall of the second pressure sensor 71b is used to abut against the outer circumferential surface of the drive shaft 43, and the second pressure sensor 71b is used for radial positioning via the drive shaft 43.

[0263] On the other hand, the groove 35 also accommodates the second pressure sensor 71b, which abuts against the bottom 351 of the groove 35 along the axial direction of the lead screw 41. Since the through hole 36 is located on the bottom 351 of the groove 35, it is understandable that providing a through hole 36 with a diameter smaller than the outer diameter of the second pressure sensor 71b ensures the contact between the second pressure sensor 71b and the bottom 351 of the groove 35, thereby limiting the axial displacement of the second pressure sensor 71b. This allows the axial thrust transmitted from the lead screw 41 to the second pressure sensor 71b to be borne by the bottom 351 of the groove 35. This, in turn, ensures the detection accuracy of the second pressure sensor 71b against the axial thrust of the lead screw 41.

[0264] In one embodiment, the first end face 41a includes a second receiving groove 411, and the brake caliper 30 is also used to receive another portion of a second pressure sensor 71b. The inner diameter of the opening 4111 of the second receiving groove 411 is larger than the inner diameter of the second pressure sensor 71b along the radial direction of a lead screw 41.

[0265] Figure 21 is a cross-sectional view of the electromechanical braking device 100 provided in this application, and Figure 22 is a partial cross-sectional view of the internal components of the first clamp body 31 in the electromechanical braking device 100 provided in this application. As shown in Figures 21 and 22, the axis of the second pressure sensor 71b coincides with the axis of the lead screw 41. The first clamp body 31 of the brake caliper 30 is used to simultaneously accommodate the lead screw 41 and the second pressure sensor 71b. Along the axial direction of the lead screw 41, the second pressure sensor 71b partially extends into the second receiving groove 411 of the lead screw 41. The opening 4111 of the second receiving groove 411 faces the brake motor 50 along the axial direction of the lead screw 41. The inner diameter of the opening 4111 of the second receiving groove 411 is larger than the outer diameter of the second pressure sensor 71b, so that the second pressure sensor 71b can be partially accommodated in the second receiving groove 411.

[0266] Understandably, the second type of pressure sensor 71b can partially extend into the second receiving groove 411, so that along the radial direction of the lead screw 41, the portion of the second type of pressure sensor 71b extending into the second receiving groove 411, the lead screw 41, and the brake caliper 30 are sequentially fitted, thereby reducing the axial space occupied by the second type of pressure sensor 71b in the brake caliper 30, and thus compressing the axial dimension of the brake caliper 30.

[0267] In this embodiment, the second pressure sensor 71b is housed within the second receiving groove 411, and the second pressure sensor 71b is sleeved on the outer edge of the drive shaft 43. It is understood that the end of the drive shaft 43 is fixed to the bottom 4112 of the second receiving groove 411, so that the second receiving groove 411 also accommodates part of the drive shaft 43. This reduces the axial space occupied by the drive shaft 43 on the brake caliper 30, compresses the axial dimension of the electromechanical braking device 100, and makes the structure of the electromechanical braking device 100 of this application compact, which is beneficial for miniaturizing the electromechanical braking device 100 of this application.

[0268] In one embodiment, the second receiving groove 411 is also used to receive a thrust bearing 72, which is arranged along the axial direction of a lead screw 41 between the bottom 4112 of the second receiving groove 411 and the second pressure sensor 71b.

[0269] Figure 23 is a partially enlarged cross-sectional view of the internal components of the first clamp 31 in the electromechanical braking device 100 provided in this application. As shown in Figures 21-23, along the axial direction of the lead screw 41, the thrust bearing 72 is arranged between the bottom 4112 of the second receiving groove 411 and the second pressure sensor 71b. The thrust bearing 72 is used to bear the reverse thrust of the first friction plate 211 acting on the lead screw 41 and to reduce the friction between the lead screw 41 and the second pressure sensor 71b. During the braking process of the electromechanical braking device 100 of this application, the reverse thrust of the first friction plate 211 acting on the lead screw 41 will act on the thrust bearing 72. While bearing this part of the reverse thrust, the thrust bearing 72 will also transmit the reverse thrust to the second pressure sensor 71b so that the second pressure sensor 71b can regulate the output torque of the brake motor 50.

[0270] In one embodiment, along the radial direction of a lead screw 41, the inner diameter of the second receiving groove 411 is larger than the outer diameter of a thrust bearing 72, so as to avoid the possibility that the first shaft ring 721 of the thrust bearing 72 may come into contact with the groove wall of the second receiving groove 411 when rotating with the lead screw 41, thereby ensuring the smooth operation of the thrust bearing 72 and improving the smooth operation of the electromechanical braking device 100 of this application.

[0271] In one embodiment, along the axial direction of a lead screw 41, the length of the second receiving groove 411 is less than the sum of the length of a thrust bearing 72 and the length of the second pressure sensor 71b.

[0272] As shown in Figures 21-23, the thrust bearing 72 and the second pressure sensor 71b are arranged in contact along the axial direction of the lead screw 41. It can be understood that the length of the second receiving groove 411 along the axial direction of the lead screw 41 allows the end of the second pressure sensor 71b facing away from the thrust bearing 72 to extend out of the second receiving groove 411 and abut against the first clamp body 31. Thus, when the lead screw 41 and the screw sleeve 42 cooperate to drive the brake caliper 30 to slide, the second pressure sensor 71b can detect the pressure of the first friction plate 211 during the braking process.

[0273] That is, along the axial direction of the lead screw 41, the second pressure sensor 71b is held between the thrust bearing 72 and the brake caliper 30, which enables the second pressure sensor 71b to detect the pressure on the first friction plate 211 during braking and feed it back to the brake motor 50 to adjust the output torque of the brake motor 50, thereby further ensuring the braking reliability of the electromechanical braking device 100 of this application.

[0274] In one embodiment, the brake caliper 30 is also used to accommodate a threaded sleeve 42, a lead screw 41 is used to drive the threaded sleeve 42 to move along the axial direction of the lead screw 41, and the helical groove 412 of the lead screw 41 is used to engage the helical groove 421 of the threaded sleeve 42.

[0275] Figure 24 is a partial cross-sectional view of the internal components of the first clamp 31 in the electromechanical braking device 100 provided in this application, and Figure 25 is a partial cross-sectional view of the internal components of the first clamp 31 in the electromechanical braking device 100 provided in this application. As shown in Figures 24 and 25, the axis of the threaded sleeve 42 coincides with the axis of the lead screw 41, and the threaded sleeve 42 is used to coaxially sleeve the lead screw 41. The inner circumferential surface of the threaded sleeve 42 is provided with a helical groove 421, and the outer circumferential surface of the lead screw 41 is provided with a helical groove 412. The helical groove 421 on the inner circumferential surface of the threaded sleeve 42 engages with the helical groove 412 on the outer circumferential surface of the lead screw 41 to convert the rotational motion of the lead screw 41 driven by the brake motor 50 into the axial displacement of the threaded sleeve 42 along the lead screw 41, thereby enabling the threaded sleeve 42 to drive the first friction plate 211 to slide along the axial direction of the lead screw 41.

[0276] During the braking process of the electromechanical braking device 100, after the sleeve 42 drives the first friction plate 211 to abut against the brake disc 1002, the cooperation between the sleeve 42 and the lead screw 41 also enables the rotational motion of the brake motor 50 driving the lead screw 41 to be converted into the sleeve 42 driving the brake caliper 30 to slide along the axial direction of the lead screw 41, thereby realizing the sliding of the second friction plate 212 along the axial direction of the lead screw 41. That is, the cooperation between the sleeve 42 and the lead screw 41 realizes the braking function of the electromechanical braking device 100 of this application.

[0277] In one embodiment, along the axial direction of a lead screw 41, the length of the second receiving groove 411 is less than the length of the helical groove 412 of the lead screw 41, and the sum of the length of the helical groove 412 and the length of the second receiving groove 411 is greater than the length of the lead screw 41. That is, along the axial direction of a lead screw 41, the helical groove 412 of the lead screw 41 and the second receiving groove 411 at least partially overlap.

[0278] Understandably, the length of the second receiving groove 411 and the spiral groove 412 of the lead screw 41 along the axial direction of the lead screw 41 is such that the outer peripheral surface of the part of the lead screw 41 used to set the second receiving groove 411 is also provided with a spiral groove 412, thereby ensuring the length of the spiral groove 412 of the lead screw 41 on the outer peripheral surface of the lead screw 41 along the axial direction of the lead screw 41, and ensuring the meshing length of the lead screw 41 and the screw sleeve 42 along the axial direction of the lead screw 41, thereby realizing the reliable transmission of braking force by the electromechanical braking device of this application.

[0279] Meanwhile, the second receiving groove 411 is used to accommodate a portion of the second type of pressure sensor 71b. It is understood that a spiral groove 412 is also provided on the outer circumferential surface of the lead screw 41 used to house the second receiving groove 411. This reduces the influence of the second type of pressure sensor 71b on the axial dimension of the lead screw 41, thereby compressing the axial dimension of the brake caliper 30. This makes the electromechanical braking device 100 of this application more compact, which is beneficial for miniaturizing the electromechanical braking device 100 of this application.

[0280] In one embodiment, the outer diameter of a lead screw 41 is larger than the outer diameter of the second pressure sensor 71b along the radial direction of the lead screw 41.

[0281] When the lead screw 41 rotates relative to the brake caliper 30, the sleeve 42 may slide along the axial direction of the lead screw 41 toward the brake motor 50, causing part of the helical groove 421 of the sleeve 42 to slide out of the helical groove 412 of the lead screw 41. It is understandable that the outer diameter settings of the lead screw 41 and the second pressure sensor 71b can prevent the second pressure sensor 71b from affecting the axial sliding of the sleeve 42, thereby ensuring the engagement length of the lead screw 41 and the sleeve 42 along the axial direction of the lead screw 41, and thus achieving reliable transmission of braking force by the electromechanical braking device of this application.

[0282] In one embodiment, along the axial direction of a lead screw 41, one side of the second pressure sensor 71b directly abuts against the bottom 351 of a groove 35, and the other side of the second pressure sensor 71b abuts against the bottom 4112 of a second receiving groove 411 via a thrust bearing 72.

[0283] Figure 26 is a partially enlarged cross-sectional view of the internal components of the first clamp body 31 in the electromechanical braking device 100 provided in this application. As shown in Figure 26, along the axial direction of the lead screw 41, the two sides of the second pressure sensor 71b abut against the thrust bearing 72 and the bottom 351 of the groove 35, respectively, to achieve axial positioning of the second pressure sensor 71b. The axial dimension of the second pressure sensor 71b in the clamp body is small, which helps to reduce the overall axial dimension of the electromechanical braking device 100 and facilitates the arrangement of the wheel side space.

[0284] In one embodiment, the second pressure sensor 71b includes an axial protrusion that is embedded in the bottom 351 of a groove 35 along the axial direction of a lead screw 41. The axial protrusion of the second pressure sensor 71b is defined as the second axial protrusion 711b.

[0285] Figure 27 is a schematic diagram of the external structure of the second type of pressure sensor 71b of the electromechanical braking device 100 provided in this application. As shown in Figures 26 and 27, the second type of pressure sensor 71b has a second axial protrusion 711b on the side facing the brake motor 50. The second axial protrusion 711b is used to embed into the bottom 351 of the groove 35. The internal device of the second type of pressure sensor 71b for detecting pressure can be partially accommodated in the internal cavity of the second axial protrusion 711b. In other words, the interior of the second axial protrusion 711b can be used to accommodate the internal device of the second type of pressure sensor 71b. The second axial protrusion 711b can further reduce the axial space occupied by the second type of pressure sensor 71b in the brake caliper 30, thereby compressing the axial dimension of the brake caliper 30, which is beneficial to the miniaturization of the electromechanical braking device 100 of this application.

[0286] In one embodiment, a groove 35 along the axial direction of a lead screw 41 comprises two connected segments, one of which is at a greater distance from any mounting surface than the other segment is at a greater distance from any mounting surface. Along the radial direction of a lead screw 41, the diameter of the other segment is smaller than the outer circumferential diameter of the lead screw 41 but larger than the outer diameter of the second pressure sensor 71b.

[0287] For ease of description, the section of groove 35 with a larger distance from the first mounting surface 30a is defined as the fifth section 35a, and the section of groove 35 with a smaller distance from the first mounting surface 30a is defined as the sixth section 35b.

[0288] Figure 28 is a partial cross-sectional view of the internal components of the brake caliper 30 in the electromechanical braking device 100 provided in this application. See also Figure 26. Figure 28 is a partial cross-sectional view of the internal components of the groove 35 omitted from Figure 26. As shown in Figures 26 and 28, along the axial direction of the lead screw 41, the bottom 351 of the groove 35 is located in the fifth segment 35a, and the opening 352 of the groove 35 is located in the sixth segment 35b. The axes of the fifth segment 35a and the sixth segment 35b both coincide with the axis of the lead screw 41. Along the radial direction of the lead screw 41, the outer diameter of the lead screw 41 is larger than the outer diameter of the second pressure sensor 71b, and the sixth segment 35b is used to accommodate the second pressure sensor 71b.

[0289] Understandably, the dimensional arrangement between the fifth segment 35a and the sixth segment 35b causes the inner diameter of the sixth segment 35b to decrease radially along the lead screw 41. This results in a relatively large inner wall thickness for the portion of the brake caliper 30 used to accommodate the second pressure sensor 71b, thus improving the structural strength of the brake caliper 30. Simultaneously, the reduction in the inner diameter of the sixth segment 35b also compresses the radial dimension of the first caliper body 31 corresponding to the position of the sixth segment 35b, which is beneficial for miniaturizing the electromechanical braking device 100 of this application.

[0290] In one embodiment, the electromechanical braking device 100 of this application includes two pressure sensors. A first end face 41a includes a second receiving groove 411, and a second mounting surface 30b includes a first receiving groove 34. The second receiving groove 411 of the first end face 41a is used to receive one pressure sensor, which detects the pressure of the first friction plate 211 during braking. The first receiving groove 34 of the second mounting surface 30b is used to receive another pressure sensor, which detects the pressure of the second friction plate 212 during braking.

[0291] In one embodiment, the brake caliper 30 includes two clamping bodies arranged axially along both sides of a brake disc 1002. The first clamping body 31 is used to mount a first friction pad 211 and a second pressure sensor 71b, and the second clamping body 32 is used to mount a second friction pad 212 and at least one first pressure sensor 71a.

[0292] As shown in Figure 21, the first end face 41a includes a second receiving groove 411, and the second mounting surface 30b includes a first receiving groove 34. The second receiving groove 411 is used to accommodate a second type of pressure sensor 71b, which is used to detect the pressure of the first friction plate 211 during braking. The first receiving groove 34 is used to accommodate a first type of pressure sensor 71a, which is used to detect the pressure of the second friction plate 212 during zero-point detection.

[0293] As shown in Figure 21, the second receiving groove 411 is located near the brake caliper 30 relative to the brake motor 50. It is understood that partially accommodating the second pressure sensor 71b within the second receiving groove 411 reduces the space occupied by the second pressure sensor 71b in the axial direction of the lead screw 41, thereby compressing the axial dimension of the brake caliper 30 near the brake motor 50. This reduces the axial dimension of the electromechanical braking device 100 on the side near the brake motor 50, making the electromechanical braking device 100 more compact and facilitating its miniaturization.

[0294] In this embodiment, the first receiving groove 34 is located at the far end of the brake caliper relative to the brake motor 50. It can be understood that by partially accommodating the first pressure sensor 71a in the first receiving groove 34, the space occupied by the first pressure sensor 71a in the axial direction of the lead screw 41 can be reduced, thereby compressing the axial dimension of the brake caliper 30 at the far end relative to the brake motor 50. This reduces the axial dimension of the electromechanical braking device 100 on the side near the brake motor 50, making the electromechanical braking device 100 more compact and facilitating its miniaturization.

[0295] Therefore, this application accommodates the second type of pressure sensor 71b in the second receiving groove 411 and the first type of pressure sensor 71a in the first receiving groove 34, reducing the space occupied by the first type of pressure sensor 71a and the second type of pressure sensor 71b in the axial direction of the lead screw 41, thereby compressing the axial dimension of the brake caliper 30 of this application, reducing the axial dimension of the electromechanical braking device 100 of this application, making the structure of the electromechanical braking device 100 of this application compact, which is conducive to realizing the miniaturization of the electromechanical braking device 100 of this application.

[0296] On the other hand, the installation of the first pressure sensor 71a and the second pressure sensor 71b enables real-time detection of the pressure of the two friction pads 21 during braking, avoiding a mismatch between the braking force output by the brake motor 50 and the pressure of the friction pads 21 pressing against the brake disc 1002. This achieves the power feedback function of the electromechanical braking device 100 of this application, further ensuring the braking reliability of the electromechanical braking device 100 of this application.

[0297] In this embodiment, compared to the prior art which uses a single pressure sensor to ensure the braking reliability of the electromechanical braking device, the electromechanical braking device 100 of this application uses at least two pressure sensors. This allows the data detected by each pressure sensor to be cross-referenced, reducing the impact of measurement errors of the pressure sensors themselves on the detection results, improving the accuracy of each pressure sensor in detecting the pressure of the corresponding friction plate 21, thereby improving the control precision of the braking force output by the brake motor 50 by the electromechanical braking device 100, and further improving the braking reliability of the electromechanical braking device 100.

[0298] The electromechanical braking device 100 of this application utilizes a friction plate 21 and a pressure sensor mounted on each clamp body, which also makes the structure of the electromechanical braking device 100 of this application relatively simple and easy to manufacture.

[0299] Therefore, based on the limitations of the above embodiments, the electromechanical braking device 100 of this application utilizes the mutual cooperation between the helical groove 412 of the lead screw 41 and the helical groove 421 of the screw sleeve 42, so that the braking force output by the brake motor 50 can be transmitted to the lead screw 41 through the reducer 60. Simultaneously, the lead screw 41 rotates, causing the screw sleeve 42 to slide axially. The axial sliding of the screw sleeve 42 transmits the braking force to the two friction plates 21, causing the two friction plates 21 to slide towards the brake disc 1002 and brake the brake disc 1002. This achieves the braking function of the electromechanical braking device 100 of this application.

[0300] The electromechanical braking device 100 of this application also provides a first type of pressure sensor 71a and a second type of pressure sensor 71b to detect the braking force on the first friction plate 211 and the second friction plate 212 during braking, respectively. The first type of pressure sensor 71a, which has a smaller range, can be used to detect the zero point of the electromechanical braking device 100 of this application and ensure the detection accuracy.

[0301] In other words, the electromechanical braking device 100 of this application works in conjunction with a first pressure sensor 71a and a second pressure sensor 71b with different ranges, which can take into account the detection accuracy during the zero-point detection process and the detection range throughout the entire braking process, thereby improving the braking force control accuracy of the electromechanical braking device 100. This ensures the braking reliability of the electromechanical braking device 100 of this application.

[0302] On the other hand, the electromechanical braking device 100 of this application further reduces the axial dimension of the electromechanical braking device 100 by providing a second receiving groove 411 on the first end face 41a of the lead screw 41 and a first receiving groove 34 on the first mounting surface 30a of the brake caliper 30, such that the second pressure sensor 71b is partially received in the second receiving groove 411 and the first pressure sensor 71a is received in the first receiving groove 34. This facilitates the miniaturization of the electromechanical braking device 100 and makes the structure of the electromechanical braking device 100 of this application compact.

[0303] Based on the present application, the electromechanical braking device 100, by accommodating the second pressure sensor 71b in the second receiving groove 411 and the first pressure sensor 71a in the first receiving groove 34, compresses the axial dimension of the electromechanical braking device 100, resulting in a compact structure. When the electromechanical braking device 100 is applied to a vehicle, it can output braking force through the brake motor 50, and act on the brake disc 1002 through the reducer 60, lead screw 41, screw sleeve 42, brake caliper 30, and friction pad 21 to achieve the vehicle's braking function. The first pressure sensor 71a and the second pressure sensor 71b of the electromechanical braking device 100 work together to provide the braking force control accuracy of the electromechanical braking device 100, resulting in better braking effect and longer service life of the vehicle. On the other hand, the compact structure of the electromechanical braking device 100 is conducive to miniaturization to fit the wheel space of the vehicle, and facilitates the arrangement of internal components near the vehicle wheel 1001 and the control of the overall volume of the vehicle.

[0304] In the above embodiments of this application, the first pressure sensor 71a and the second pressure sensor 71b are arranged on both sides of the brake disc 1002 along the axial direction of the lead screw 41, so as to realize the pressure detection of the first friction plate 211 and the second friction plate 212 respectively. In one embodiment, the first pressure sensor 71a and the second pressure sensor 71b are located on the same side of the brake disc 1002 along the axial direction of the lead screw 41.

[0305] In one embodiment, at least one of the clamps is used to mount a friction plate 21 and to accommodate a first pressure sensor 71a and a second pressure sensor 71b. The second pressure sensor 71b is arranged between a friction plate 21 and a first pressure sensor 71a along the axial direction of a brake disc 1002.

[0306] Figure 29 is a cross-sectional schematic diagram of the internal components of the first clamp body 31 in the electromechanical braking device 100 provided in this application. As shown in Figure 29, the first pressure sensor 71a and the second pressure sensor 71b are both installed in the second clamp body 32 and housed in the first receiving groove 34. The axes of the first pressure sensor 71a and the second pressure sensor 71b are both coincident with the axis of the lead screw 41. Along the axial direction of the lead screw 41, the bottom 341 of the first receiving groove 34, the first pressure sensor 71a, the second pressure sensor 71b, the sliding member 90, the second friction plate 212, and the first friction plate 211 are arranged sequentially. The first pressure sensor 71a and the second pressure sensor 71b are both used to detect the pressure of the second friction plate 212.

[0307] During the braking process of the electromechanical braking device 100 of this application, the lead screw 41 and the sleeve 42 cooperate with each other, so that the sleeve 42 can transmit the braking force to the second friction plate 212 through the brake caliper 30, and cause the second friction plate 212 to slide along the axial direction of the lead screw 41 toward the brake disc 1002. At this time, the second friction plate 212 simultaneously bears the reverse thrust provided by the release spring 22, the return spring and the brake disc 1002. This reverse thrust is transmitted to the second pressure sensor 71b and the first pressure sensor 71a through the sliding member 90, thereby realizing the pressure detection function of the first pressure sensor 71a and the second pressure sensor 71b on the second friction plate 212.

[0308] It is understandable that the first pressure sensor 71a is placed on the side of the second pressure sensor 71b away from the second friction plate 212, so that an elastic element 80 or other structure can be set between the first pressure sensor 71a and the bottom 341 of the first receiving groove 34 to protect the first pressure sensor 71a.

[0309] In one embodiment, both the first pressure sensor 71a and the second pressure sensor 71b are housed within the groove 35 of the first clamp 31. The axes of both the first pressure sensor 71a and the second pressure sensor 71b coincide with the axis of the lead screw 41. Along the axial direction of the lead screw 41, the second friction plate 212, the first friction plate 211, the lead screw 41, the second pressure sensor 71b, and the first pressure sensor 71a are arranged sequentially. Both the first pressure sensor 71a and the second pressure sensor 71b are used to detect the pressure of the first friction plate 211.

[0310] During the braking process of the electromechanical braking device 100 of this application, the lead screw 41 and the sleeve 42 cooperate with each other, so that the sleeve 42 can transmit power to the first friction plate 211, and cause the first friction plate 211 to slide along the axial direction of the lead screw 41 toward the brake disc 1002. At this time, the first friction plate 211 simultaneously bears the reverse thrust provided by the release spring 22 and the brake disc 1002. This reverse thrust is transmitted through the lead screw 41 to the second pressure sensor 71b and the first pressure sensor 71a, thereby realizing the pressure detection function of the first pressure sensor 71a and the second pressure sensor 71b on the first friction plate 211.

[0311] It is understandable that the first pressure sensor 71a is placed on the side of the second pressure sensor 71b away from the first friction plate 211, so that an elastic element 80 or other structure can be set between the first pressure sensor 71a and the bottom 351 of the groove 35 to protect the first pressure sensor 71a.

[0312] Therefore, based on the limitations of the two embodiments described above, the first pressure sensor 71a and the second pressure sensor 71b are installed in the same clamping body, so that the first pressure sensor 71a and the second pressure sensor 71b can simultaneously detect the pressure of the friction pad 21 pressing against the brake disc 1002 installed in the same clamping body. This achieves real-time detection of the pressure of the friction pad 21 during braking, avoiding a mismatch between the braking force output by the brake motor 50 and the pressure of the friction pad 21 pressing against the brake disc 1002. This further realizes the power feedback function of the electromechanical braking device 100 of this application, further ensuring the braking reliability of the electromechanical braking device 100 of this application.

[0313] On the other hand, installing the first pressure sensor 71a and the second pressure sensor 71b in the same caliper body can make the overall structure of the brake caliper 30 more compact, which is conducive to the miniaturization of the electromechanical braking device 100 of this application.

[0314] In one embodiment, the electromechanical braking device 100 of this application further includes a piston 44, the axis of which coincides with the axis of the lead screw 41. Along the axial direction of the lead screw 41, one end of the piston 44 is used to abut against the first friction plate 211, and the other end is used to accommodate a portion of the threaded sleeve 42. That is, along the radial direction of the lead screw 41, the end of the piston 44 away from the first friction plate 211, the threaded sleeve 42, and the lead screw 41 are sequentially fitted. During the braking process of the electromechanical braking device 100 of this application, the threaded sleeve 42 slides toward the first friction plate 211 under the action of the braking force of the lead screw 41, and pushes the first friction plate 211 to slide through the piston 44, so that the first friction plate 211 abuts against the brake disc 1002, thereby realizing the braking function of the electromechanical braking device 100 of this application.

[0315] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of protection of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An electromechanical braking device with dual pressure sensors having different ranges, characterized in that, The electromechanical braking device is used to drive at least one friction pad to brake a brake disc. The electromechanical braking device includes a brake caliper and two pressure sensors with different ranges. The brake caliper includes at least one clamp body, which is used to mount the two pressure sensors and the at least one friction pad, wherein: A first type of pressure sensor is used to detect the pressure exerted on at least one of the friction pads during zero-point detection, and a second type of pressure sensor is used to detect the pressure exerted by at least one of the friction pads on a brake disc during braking. The range of the first type of pressure sensor is smaller than the range of the second type of pressure sensor.

2. The electromechanical braking device according to claim 1, characterized in that, One of the at least one clamps is used to mount one of the friction plates and to accommodate at least one of the first type of pressure sensors, wherein: At least one first pressure sensor is arranged along the axial direction of the brake disc on the side of the friction pad away from the brake disc, and the at least one first pressure sensor is used to detect the pressure on the friction pad.

3. The electromechanical braking device according to claim 1 or 2, characterized in that, The clamp body is also used to accommodate at least one elastic element, each of the elastic elements being used to buffer the reverse pressure of the friction plate on one of the first type of pressure sensors, wherein: Along the axial direction of one of the brake discs, one of the elastic elements is arranged in abutment against one of the first type of pressure sensors facing either the clamp body side or the friction plate side.

4. The electromechanical braking device according to any one of claims 1-3, characterized in that, The clamp body includes a receiving groove and a sliding member, the receiving groove being used to receive one of the first type of pressure sensors, wherein: Along the axial direction of the brake disc, a sliding member is arranged between the first pressure sensor and the friction plate. The opening of the receiving groove faces the friction plate and is used to receive a portion of the sliding member. The friction plate is used to fixally connect another portion of the sliding member.

5. The electromechanical braking device according to claim 4, characterized in that, The receiving slot includes a first section and a second section connected together, wherein: Along the axial direction of the brake disc, the first segment is arranged on the side of the second segment away from the friction pad, and the first segment is used to accommodate the first type of pressure sensor; Along the radial direction of the brake disc, the size of the first segment is smaller than the size of the second segment and smaller than the maximum width of the slider.

6. The electromechanical braking device according to claim 5, characterized in that, The receiving groove is also used to at least partially receive an elastic element, and the length of the receiving groove along the axial direction of the brake disc is less than the sum of the length of the first pressure sensor and the natural length of the elastic element.

7. The electromechanical braking device according to any one of claims 1-6, characterized in that, The electromechanical braking device includes two first-type pressure sensors, which are mounted on the same clamp body, wherein: Along the axial direction of the brake disc, the two first pressure sensors are arranged between the clamp and the friction plate; Along the radial direction of the brake disc, the distance between the two first pressure sensors is greater than the outer diameter of either first pressure sensor.

8. The electromechanical braking device according to claim 1, characterized in that, One of the at least one clamps is used to mount one of the friction plates and to accommodate one of the second type of pressure sensors, wherein: A second pressure sensor is arranged along the axial direction of the brake disc on the side of the friction pad away from the brake disc, and the second pressure sensor is used to detect the pressure of the friction pad pressing against the side of the brake disc.

9. The electromechanical braking device according to claim 1 or 8, characterized in that, The electromechanical braking device includes a lead screw, a clamp body for accommodating the lead screw and a second pressure sensor, and the lead screw for driving the friction plate, wherein: Along the axial direction of the brake disc, the lead screw is arranged between the friction pad and the second pressure sensor.

10. The electromechanical braking device according to claim 9, characterized in that, The clamp body also accommodates a thrust bearing, which is arranged along the axial direction of the brake disc between the lead screw and the second type of pressure sensor, wherein: Along the radial direction of the brake disc, the outer diameter of the thrust bearing is greater than the inner diameter of the second type of pressure sensor, smaller than the outer diameter of the lead screw, and smaller than the outer diameter of the second type of pressure sensor.

11. The electromechanical braking device according to claim 9 or 10, characterized in that, The electromechanical braking device includes a brake motor and a drive shaft. A clamp is used to fix the brake motor, and the drive shaft is used to drive the lead screw and the brake motor, wherein: Along the axial direction of the brake disc, the second pressure sensor is arranged between the lead screw and the brake motor; Along the radial direction of the brake disc, the second pressure sensor is sleeved on the outside of the drive shaft.

12. The electromechanical braking device according to claim 11, characterized in that, The clamp body includes a groove and a through hole. The groove is used to accommodate the lead screw and the second pressure sensor. The through hole extends through the bottom of the groove along the axial direction of the brake disc. The through hole is used to accommodate the drive shaft through which the drive shaft passes. Along the radial direction of the lead screw, the diameter of the through hole is greater than or equal to the outer diameter of the drive shaft and less than the outer diameter of the second type of pressure sensor.

13. The electromechanical braking device according to any one of claims 1-12, characterized in that, The brake caliper includes two caliper bodies, which are arranged along the axial direction of the brake disc on both sides of the brake disc, wherein: One clamp is used to mount one of the friction plates and one of the second type of pressure sensors, and the other clamp is used to mount another of the friction plates and at least one of the first type of pressure sensors.

14. The electromechanical braking device according to any one of claims 1-12, characterized in that, One of the at least one clamps is used to mount one of the friction plates and to accommodate one of the first type of pressure sensors and one of the second type of pressure sensors, wherein: Along the axial direction of the brake disc, the second pressure sensor is arranged between the friction pad and the first pressure sensor.

15. A vehicle, characterized in that, Includes wheels, a frame, and an electromechanical braking device as described in any one of claims 1-14, wherein: The brake caliper in the electromechanical braking device is used to slide along the axial direction of the wheel to connect to the frame. At least one friction pad in the electromechanical braking device is used to brake the brake disc of the wheel along the axial direction of the wheel.

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