Electronic control execution unit of brake-by-wire system and use thereof

Abstract

The present invention belongs to the field of automobile braking. Disclosed are an electronic control execution unit of a brake-by-wire system and the use thereof. The electronic control execution unit comprises a main unit and, integrated into the main unit, a permanent magnet brushless direct current motor and a speed reduction and torque boosting gear set. The permanent magnet brushless direct current motor comprises a stator assembly and a rotor assembly. The rotor assembly is connected to one end of a motor shaft, the other end of the motor shaft being connected to an input end of the speed reduction and torque boosting gear set. An output end of the speed reduction and torque boosting gear set is connected to an output shaft, the output shaft extending out of the main unit. In the electronic control execution unit of a brake-by-wire system and the use thereof in the present invention, the permanent magnet brushless direct current motor and the speed reduction and torque boosting gear set are assembled onto the integrally-formed main unit, thereby achieving the advantages of high mounting precision and compact structure. In addition, the permanent magnet brushless direct current motor can directly drive the speed reduction and torque boosting gear set to reduce speed and output torque, thereby improving transmission efficiency.

Description

An electronic control execution unit for a wire-controlled brake system and its application Technical Field

[0001] The present invention relates to the technical field of automobile braking, and in particular to an electronic control execution unit of a wire-controlled brake system and applications thereof. Background Art

[0002] With the rapid development of new energy vehicle and intelligent driving technologies, vehicle systems are becoming increasingly integrated, electrified, and safer. Braking systems have evolved from the vacuum-assisted braking systems of fuel-powered vehicles to electronic hydraulic braking systems in new energy vehicles, enabling autonomous pressure reduction and brake assist. Due to its simple structure, high feasibility, and low technical difficulty, EHB (Electronic Hydraulic Braking System) has enabled numerous automakers to incorporate this technology into new energy vehicles and enter mass production. However, since its working medium is still brake fluid, it requires hydraulic piping, a pressurizing mechanism, and a hydraulic actuator, making the vehicle layout relatively complex and requiring regular brake fluid replacement. Vehicle stability control and anti-lock braking functions require the additional support of ABS or ESC, resulting in a low level of integration within the overall braking system.

[0003] Although the Onebox system that replaces the EHB system has improved its integration, it still cannot get rid of brake fluid and pipelines. It is obvious that as long as there is medium transmission, there will be response delays and failure risks.

[0004] The further developed EMB (Electromechanical Braking System) offers improved integrated controllability and braking performance, completely eliminating the bulky hydraulic oil circuits and associated mechanisms. This allows for more convenient installation angles and locations, eliminating the need for exhaust vents. Without a hydraulic medium, the motor directly drives the gear mechanism, which in turn drives the brake pads. This provides fast response, excellent braking performance, and easier maintenance. An integrated controller drives the EMB actuator, enabling anti-lock braking (ABS), traction control (TCS), electronic stability control (ESC), and emergency braking (AEB) without the need for external mechanisms. This high level of mechatronics ensures excellent stability.

[0005] The core actuator of the EMB system is the motor-gear transmission structure. Currently, most manufacturers' EMB system actuator units require a large axial installation space and lack an integrated parking mechanism, making them incapable of parking. Separate parking brake calipers and mechanisms are required, resulting in limited space, a relatively complex system structure, and high costs.

[0006] Some manufacturers use an integrated parking mechanism EMB system, whose parking brake structure is a ratchet mechanism plus a lever mechanism, and is returned by a spring. The structure is complex, and the ratchet pawl sometimes cannot achieve precise cooperation during actual operation, reducing the service life of the mechanism.

[0007] Furthermore, in the EMB braking system, the motor in the actuator unit is used for both service and parking braking. This motor typically requires a high power design, resulting in a relatively large size and weight, high energy consumption, and significant heat generation. During continuous braking, heat energy from the brake disc is transferred through the brake pad to the brake caliper, and then to the motor itself. This, combined with the motor's own operating heat, can easily lead to overheating. High temperatures can increase the temperature of the motor's magnets, and in severe cases, can permanently demagnetize the magnetic material. Furthermore, as the motor's temperature rises, its internal resistance also increases, increasing voltage drop and copper loss, thus affecting its output power.

[0008] However, the increase in the size and weight of the motor, the material of the actuator housing, and the installation and fixation of the actuator and the brake caliper directly affect the reliability of the system. To address this problem, the existing EPB actuator unit often adopts a two-point fixing method, which cannot meet the reliability requirements of the EMB actuator unit. Summary of the Invention

[0009] To solve the above problems, the present invention provides an electronic control execution unit for a wire-controlled brake system and its application, which eliminates the hydraulic system and directly integrates the motor into the brake caliper. When there is a braking demand, the system controller ECU controls the motor to generate braking force to complete the function, thereby realizing complete electronic control of the brake. Since there is no long pipeline action time of the hydraulic system, a faster braking response can be achieved.

[0010] To achieve the above-mentioned objectives, the present invention provides an electronic control execution unit for a wire control brake system, comprising a body and a permanent magnet brushless DC motor and a deceleration and torque-increasing gear set integrated inside the body, wherein the permanent magnet brushless DC motor comprises a stator assembly and a rotor assembly, the rotor assembly is connected to one end of the motor shaft, the other end of the motor shaft is connected to the input end of the deceleration and torque-increasing gear set, the output end of the deceleration and torque-increasing gear set is connected to the output shaft, and the output shaft extends out of the body.

[0011] Preferably, the rotor assembly is interference-fitted with the motor shaft, and the motor shaft is interference-fitted with the parking lock electromagnetic assembly or key-connected;

[0012] The parking lock solenoid assembly includes a demagnetized locking disc that is keyed or interference-fitted with the motor shaft, a locking pin, and a locking mounting housing. A positioning hole is formed on the outer circumference of the locking disc, and the locking pin is disposed corresponding to the positioning hole. The locking pin is vertically slidably disposed within the locking mounting housing.

[0013] The locking latch is an electromagnetic latch, which is electrically connected to the power line via the terminal provided on the locking mounting shell and the signal acquisition chip and connector provided on the inner wall of the machine body. The connector is also electrically connected to the stator assembly via the power line.

[0014] Preferably, an anti-rotation boss is fixed on the outer wall of the locking mounting shell, and an anti-rotation groove is opened on the inner wall of the body at a position corresponding to the anti-rotation boss. The anti-rotation boss extends into the anti-rotation groove to prevent the parking lock electromagnetic assembly from rotating during the up and down movement.

[0015] Preferably, the speed reduction and torque increase gear set includes an input gear connected to the motor shaft, a duplex gear meshing with the input gear, and an output gear meshing with the duplex gear, wherein the output gear is connected to the output shaft;

[0016] The input gear is connected to the motor shaft via an involute backlash-free spline, or the input gear and the motor shaft are interference fit, or the input gear and the motor shaft are integrally formed;

[0017] The input gear, duplex gear and output gear are all spur gears or helical gears.

[0018] Preferably, the double gears are rotatably arranged on the outside of the core shaft, and the core shaft is fixed inside the machine body;

[0019] The duplex gears include an integrally formed top gear and a bottom gear, the top gear meshes with the output gear, and the bottom gear meshes with the input gear, and the number of teeth of the input gear, the top gear, the bottom gear and the output gear increases in sequence;

[0020] The top gear is rotatably connected to the core shaft via a shaft sleeve, and the bottom gear is rotatably connected to the core shaft via a bearing;

[0021] An annular oil pocket for storing grease is provided on the inner surface of the sleeve.

[0022] Preferably, the center hole of the output gear is provided with an involute internal spline, and the involute internal spline is arranged to cooperate with the involute external spline at the end of the output shaft;

[0023] One end of the output shaft extends out of the output gear and is provided with an elastic retaining ring on the outer circumference side. The other end of the output shaft passes through the machine body. The output shaft between the machine body and the output gear is rotatably connected to the inside of the machine body via a bearing.

[0024] Preferably, the end of the motor shaft passing through the input gear is connected to a magnetic ring assembly for detecting the position of the motor shaft via a pin shaft, and a positioning ring for preventing the magnetic ring assembly from moving up and down is provided at a position of the pin shaft corresponding to the magnetic ring assembly, and the inner side of the magnetic ring assembly is clamped with the pin shaft via the positioning ring;

[0025] The magnetic ring assembly is a sensor magnetic ring composed of at least one pair of magnetic poles. The sensor magnetic ring is electrically connected to the signal line via a connector arranged on the inner wall of the machine body.

[0026] Preferably, the machine body is a sealed structure consisting of a main body, an upper cover and an end cover. A cover plate is provided between the upper cover and the main body to prevent grease from splashing and overflowing between the deceleration and torque-increasing gear sets. The cover plate is connected to the main body by screws.

[0027] A sealed installation cavity is formed between the cover plate, the body and the end cover, and a permanent magnet brushless DC motor and a speed reduction and torque increasing gear set are installed in the sealed installation cavity;

[0028] A sealing ring is provided between the upper cover and the body, or a sealant is applied between the end cover and the body, and the upper cover and the body, or the end cover and the body are connected by screws or sealant;

[0029] The upper cover is an aluminum stamping.

[0030] Preferably, the end cover is arranged corresponding to the end of the motor shaft away from the speed reduction and torque increasing gear set, and a wave spring is provided between the motor shaft and the inner wall of the end cover for reducing vibration and adjusting the axial clearance of the motor shaft.

[0031] An application of an electronic control actuator unit of a wire control brake system in automobile braking. The electronic control actuator unit of the wire control brake system is symmetrically arranged on both sides of the automobile tire, and the electronic control actuator unit of the wire control brake system and the brake caliper adopt a three-point mounting method.

[0032] The output shaft after passing through the machine body is connected to the internal spline at the brake caliper end via an external spline or an involute spline.

[0033] The present invention has the following beneficial effects:

[0034] 1. By assembling the permanent magnet brushless DC motor and the deceleration and torque-increasing gear set on an integrally formed machine body, it has the advantages of high installation precision and compact structure. In addition, the permanent magnet brushless DC motor can directly drive the deceleration and torque-increasing gear set to decelerate and output torque, thereby improving transmission efficiency.

[0035] 2. It integrates the service brake and parking brake functions with a high degree of integration. The actuator is not limited by the outer dimensions of the brake caliper cylinder and is suitable for brake calipers of various sizes.

[0036] 3. The use of permanent magnet brushless DC motor can achieve greater torque output, longer motor service life and lower noise;

[0037] In summary, the entire execution unit has the characteristics of compact structure, small size, light weight, good heat dissipation and easy fixed installation.

[0038] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] FIG1 is a cross-sectional view of an electronic control execution unit of a wire control brake system according to the present invention;

[0040] FIG2 is a schematic structural diagram of a parking lock electromagnetic assembly of an electronically controlled actuator unit of a brake-by-wire system according to the present invention;

[0041] FIG3 is an assembly diagram of a double gear of an electronically controlled actuator of a brake-by-wire system according to the present invention;

[0042] FIG4 is a schematic structural diagram of a magnetic ring assembly of an electronic control execution unit of a wire control brake system according to the present invention;

[0043] FIG5 is an application assembly diagram of an electronic control execution unit of a wire control brake system according to the present invention.

[0044] Among them: 1. Machine body; 11. Main body; 12. Upper cover; 13. End cover; 131. Wave spring; 2. Permanent magnet brushless DC motor; 21. Stator assembly; 22. Rotor assembly; 23. Motor shaft; 3. Speed ​​reduction and torque increase gear set; 31. Input gear; 32. Double gear; 321. Top gear; 322. Bottom gear; 33. Output gear; 34. Core shaft; 4. Output shaft; 5. Parking lock electromagnetic assembly; 51. Locking plate; 511. Positioning hole; 52. Locking pin; 53. Locking mounting shell; 531. Anti-rotation boss; 6. Signal acquisition chip; 7. Connector; 8. Magnetic ring assembly; 9. Brake caliper. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages disclosed in the embodiments of the present invention clearer, the embodiments of the present invention are further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. Examples of the embodiments are shown in the accompanying drawings, where the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions.

[0046] It should be noted that the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or server that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or are inherent to these processes, methods, products or devices.

[0047] Like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0048] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0049] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0050] As shown in Figures 1 to 5, an electronic control execution unit of a wire control brake system includes a body 1 and a permanent magnet brushless DC motor 2 and a deceleration and torque-increasing gear set 3 integrated inside the body 1, wherein the permanent magnet brushless DC motor 2 includes a stator assembly 21 and a rotor assembly 22, the rotor assembly 22 is connected to one end of a motor shaft 23, the other end of the motor shaft 23 is connected to the input end of the deceleration and torque-increasing gear set 3, the output end of the deceleration and torque-increasing gear set 3 is connected to the output shaft 4, and the output shaft 4 extends out of the body 1.

[0051] Specifically, the rotor assembly 22 is interference-fitted with the motor shaft 23. When in operation, the motor shaft 23 rotates synchronously with the rotor assembly 22. The motor shaft 23 is interference-fitted or key-connected with the parking lock electromagnetic assembly 5. The parking lock electromagnetic assembly 5 includes a demagnetized locking plate 51 that is key-connected or interference-fitted with the motor shaft 23 (because the locking plate 51 is close to the rotor assembly 22, the locking plate 51 is demagnetized or made of non-magnetic material to avoid the locking plate 51 from affecting the rotor components), a locking pin, and a locking mounting shell 53. The outer circumference of the locking disk 51 is provided with positioning holes 511. In this embodiment, the outer circumference of the locking disk 51 is evenly distributed with multiple positioning holes 511. The locking pin 52 is provided corresponding to the positioning holes 511 and is vertically slidably provided inside the locking mounting shell 53. The locking pin 52 is an electromagnetic pin. The electromagnetic pin is electrically connected to the power line via the terminal provided on the locking mounting shell 53, the signal acquisition chip 6 provided on the inner wall of the body 1, and the connector 7. The connector 7 is also electrically connected to the stator assembly 21 via the power line. The external controller communicates with the connector 7 and controls the forward and reverse rotation of the motor according to the braking requirements of the vehicle, thereby achieving vehicle braking, deceleration, and parking through the clamping and releasing actions of the brake caliper 9. At the same time, by controlling the locking pin shaft to be inserted into the positioning hole 511 of the locking disk, the locking disk and the motor shaft 23 can be prevented from rotating freely, thereby achieving motor locking and completing the vehicle parking function.

[0052] Preferably, an anti-rotation boss 531 is fixed on the outer wall of the locking mounting shell 53, and an anti-rotation groove is opened on the inner wall of the body 1 at the position corresponding to the anti-rotation boss 531. The anti-rotation boss 531 extends into the anti-rotation groove to prevent the parking lock electromagnetic assembly 5 from rotating during the up and down movement.

[0053] Preferably, the deceleration and torque-increasing gear set 3 includes an input gear 31 connected to the motor shaft 23, a duplex gear 32 meshing with the input gear 31, and an output gear 33 meshing with the duplex gear 32, and the output gear 33 is connected to the output shaft 4; the input gear 31 is connected to the motor shaft 23 via an involute backlash-free spline, or the input gear 31 and the motor shaft 23 are interference fit, or the input gear 31 and the motor shaft 23 are formed as one piece; the input gear 31, the duplex gear 32 and the output gear 33 are all spur gears or helical gears.

[0054] Preferably, the double gear 32 is rotatably arranged on the outside of the core shaft 34, and the core shaft 34 is fixed inside the body 1; the double gear 32 includes an integrally formed top gear 321 and a bottom gear 322, the top gear 321 is engaged with the output gear 33, and the bottom gear 322 is engaged with the input gear 31, and the number of teeth of the input gear 31, the top gear 321, the bottom gear 322 and the output gear 33 increases successively; the top gear 321 is rotatably connected to the core shaft 34 via a shaft sleeve, and the bottom gear 322 is rotatably connected to the core shaft 34 via a bearing; an annular oil pocket for storing grease is provided on the inner circular surface of the shaft sleeve.

[0055] Preferably, the center hole of output gear 33 is equipped with an involute internal spline, which mates with the involute external spline at the end of output shaft 4 to achieve torque transmission. This spline-type design can transmit greater torque and is more suitable for forward and reverse motion transmission. A circlip is provided on the outer circumference of one end of output shaft 4 after it extends beyond output gear 33. The other end of output shaft 4 extends beyond body 1. Output shaft 4 is rotatably connected to the interior of body 1 via a bearing between body 1 and output gear 33.

[0056] Preferably, the end of the motor shaft 23 passing through the input gear 31 is connected to a magnetic ring assembly 8 for detecting the position (phase angle) of the motor shaft 23 via a pin shaft. A positioning ring is provided at the position of the pin shaft corresponding to the magnetic ring assembly 8 to prevent the magnetic ring assembly 8 from moving up and down. The inner side of the magnetic ring assembly 8 is clamped with the pin shaft via the positioning ring, and the magnetic ring material is pre-injected onto the pin shaft before magnetization; the magnetic ring assembly 8 is a sensor magnetic ring composed of at least one pair of magnetic poles, and the sensor magnetic ring is electrically connected to the signal line via a connector 7 arranged on the inner wall of the body 1.

[0057] Preferably, the body 1 is a sealed structure consisting of a main body 11, an upper cover 12 and an end cover 13. A cover plate is provided between the upper cover 12 and the main body 11 to prevent grease from splashing and overflowing between the deceleration and torque-increasing gear set 3. The cover plate is connected to the main body 11 by screws, which not only ensures that the gear grease does not overflow, but also prevents foreign matter from entering, and can also isolate the meshing noise of the gear transmission, so that the electronic control execution unit of the wire control brake system has a good comfort experience on the vehicle; a sealed installation cavity is formed between the cover plate, the main body 11 and the end cover 13, and a permanent magnet brushless DC motor 2 and a deceleration and torque-increasing gear set 3 are installed in the sealed installation cavity; a sealing ring is provided between the upper cover 12 and the main body 11, as well as between the end cover 13 and the main body 11, or is coated with sealant, and the upper cover 12 and the main body 11, as well as the end cover 13 and the main body 11 are connected by screws or sealant; the upper cover 12 is an aluminum stamping part, so it has a good heat dissipation function. At the same time, the main body 11 adopts a die-cast aluminum alloy structure, which can not only ensure strength and lightweight, but also better dissipate heat for the motor.

[0058] Preferably, the end cover 13 is arranged corresponding to the end of the motor shaft 23 away from the deceleration and torque-increasing gear set 3, and a wave spring 131 is provided between the motor shaft 23 and the inner wall of the end cover 13 for reducing vibration and adjusting the axial clearance of the motor shaft 23.

[0059] A brake-by-wire system electronic control execution unit is used in automobile braking. The brake-by-wire system electronic control execution unit is symmetrically arranged on both sides of the automobile tire, and the brake-by-wire system electronic control execution unit and the brake caliper 9 are installed at three points; the output shaft 4 after passing through the body 1 is connected to the internal spline at the end of the brake caliper 9 via an external spline or an involute spline.

[0060] Therefore, the present invention adopts the above-mentioned electronic control execution unit of the wire control braking system and its application, and has the advantages of high installation precision and compact structure by assembling the permanent magnet brushless DC motor and the deceleration and torque-increasing gear set on an integrally formed body; and the permanent magnet brushless DC motor can directly drive the deceleration and torque-increasing gear set to decelerate and output torque, thereby improving transmission efficiency.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solutions of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. An electronic control actuator for a wire brake system, characterized in that: It includes a body, a permanent magnet brushless DC motor integrated inside the body, and a speed reduction and torque increase gear set. Among them, the permanent magnet brushless DC motor includes a stator assembly and a rotor assembly. The rotor assembly is connected to one end of the motor shaft, the other end of the motor shaft is connected to the input end of the speed reduction and torque increase gear set, and the output end of the speed reduction and torque increase gear set is connected to the output shaft, and the output shaft extends out of the body.

2. The electronic control actuator of a wire control braking system according to claim 1, characterized in that: The rotor assembly is in interference fit with the motor shaft, and the motor shaft is in interference fit or key-connected with the parking lock electromagnetic assembly; The parking lock electromagnetic assembly includes a lock disk that is key-connected or in interference fit with the motor shaft and has been demagnetized, a lock pin, and a lock mounting shell. A positioning hole is provided on the outer circumferential side of the lock disk. The lock pin is arranged corresponding to the positioning hole, and the lock pin is vertically slidably arranged inside the lock mounting shell; The lock pin is an electromagnetic pin. The electromagnetic pin is electrically connected to the power supply line through the terminal provided on the lock mounting shell, the signal acquisition chip and the connector provided on the inner wall of the body in sequence. The connector is also electrically connected to the stator assembly through the power supply line.

3. An electronic control actuator of a wire control braking system according to claim 2, characterized in that: An anti-rotation boss is fixed on the outer wall of the lock mounting shell, and an anti-rotation groove is provided on the inner wall of the body at a position corresponding to the anti-rotation boss. The anti-rotation boss extends into the anti-rotation groove to prevent the parking lock electromagnetic assembly from rotating during the up and down movement.

4. An electronic control actuator of a wire control braking system according to claim 1, characterized in that: The speed reduction and torque increase gear set includes an input gear connected to the motor shaft, a double gear meshing with the input gear, and an output gear meshing with the double gear. The output gear is connected to the output shaft; The input gear is connected to the motor shaft through an involute backlash-free spline, or the input gear is in interference fit with the motor shaft, or the input gear is integrally formed with the motor shaft; The input gear, the double gear, and the output gear are all spur gears or helical gears.

5. An electronic control actuator of a wire brake system according to claim 4, characterized in that: The double gear is rotatably arranged outside the core shaft, and the core shaft is fixed inside the body; The double gear includes a top gear and a bottom gear integrally formed. The top gear meshes with the output gear, the bottom gear meshes with the input gear, and the number of teeth of the input gear, the top gear, the bottom gear, and the output gear increases in sequence; The top gear is rotatably connected to the core shaft through a bushing, and the bottom gear is rotatably connected to the core shaft through a bearing; An annular oil cavity for storing grease is provided on the inner circumferential surface of the bushing.

6. An electronic control actuator of a wire control braking system according to claim 4, characterized in that: An involute internal spline is provided in the central hole of the output gear, and the involute internal spline is arranged to cooperate with the involute external spline at the shaft end of the output shaft; A snap ring is provided on the outer circumferential side of one end of the output shaft after it extends out of the output gear. The other end of the output shaft passes through the body, and the output shaft between the body and the output gear is rotatably connected to the inside of the body through a bearing.

7. An electronic control actuator of a wire braking system according to claim 4, characterized in that: The end of the motor shaft passing through the input gear is connected by a pin shaft to a magnetic ring assembly for detecting the position of the motor shaft. A positioning ring for preventing the magnetic ring assembly from moving up and down is provided on the pin shaft corresponding to the magnetic ring assembly, and the inner side of the magnetic ring assembly is snap-connected to the pin shaft through the positioning ring; The magnetic ring assembly is a sensor magnetic ring composed of at least a pair of magnetic poles. The sensor magnetic ring is electrically connected to the signal line through the connector provided on the inner wall of the body.

8. An electronic control execution unit of a wire control braking system according to claim 1, characterized in that: The body is a sealed structure composed of a main body, an upper cover, and an end cover. A cover plate for preventing the grease between the speed reduction and torque increase gear sets from splashing and overflowing is also provided between the upper cover and the main body. The cover plate is connected to the main body by screws; A sealed installation cavity is formed among the cover plate, the body, and the end cover, and a permanent magnet brushless DC motor and a speed reduction and torque increasing gear set are installed in the sealed installation cavity; Sealing rings are provided or sealant is coated between the upper cover and the body and between the end cover and the body, and the upper cover and the body as well as the end cover and the body are connected by screws or sealant; The upper cover is an aluminum stamping part.

9. An electronic control actuator of a wire control braking system according to claim 8, characterized in that: The end cover is arranged corresponding to one end of the motor shaft far from the speed reduction and torque increasing gear set, and a wave spring for vibration damping and adjusting the axial clearance of the motor shaft is arranged between the motor shaft and the inner wall of the end cover.

10. Application of an electronic control actuator of a wire control braking system in automotive braking according to any one of the above claims 1-9, characterized in that: The electronic control execution units of the wire control braking system are symmetrically arranged on both sides of the vehicle tire, and the electronic control execution units of the wire control braking system and the brake caliper are installed in a three-point manner; The output shaft after passing through the body is connected to the internal spline at the brake caliper end through an external spline or an involute spline.

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