Electronic control execution unit for brake-by-wire system and its application

Abstract

[0003] The present invention discloses an electronic control execution unit for a brake-by-wire system and its applications, belonging to the field of automotive braking, which includes a vehicle body and a permanent magnet brushless DC motor and a reduction-torque-increasing gearset integrated within the vehicle body, wherein the permanent magnet brushless DC motor includes a stator module and a rotor module, the rotor module being connected to one end of the motor shaft and the other end of the motor shaft being connected to the input end of the reduction-torque-increasing gearset, the output end of the reduction-torque-increasing gearset being connected to an output shaft that protrudes from the vehicle body. [0004] The present invention employs the electronic control execution unit for a brake-by-wire system and its applications, and by assembling the permanent magnet brushless DC motor and the reduction-torque-increasing gearset into an integrally molded vehicle body, it has the advantages of high installation precision and a compact structure. [0005] The permanent magnet brushless DC motor can directly drive the reduction-torque-increasing gearset to achieve speed reduction and torque output, improving transmission efficiency.

Description

[Technical Field]

[0001] The present invention relates to the field of automotive braking technology, and more particularly to an electronic control execution unit for brake-by-wire systems and its applications. [Background technology]

[0002] With the rapid development of new energy vehicle technology and intelligent driving vehicle technology, vehicle systems are becoming increasingly integrated, electrified, and safe. Braking systems have gradually evolved from the vacuum-assisted braking systems of fuel-powered vehicles to electronic hydraulic braking systems for new energy vehicles, achieving autonomous decompression and brake assist functions. Because EHB (electronic hydraulic brake system) has a simple structure, high feasibility, and low technical complexity, many automakers have applied this technology to new energy vehicles and begun mass production. However, because the working medium is still brake fluid, hydraulic lines, pressure mechanisms, and hydraulic actuators are required, making the overall vehicle layout relatively complex and requiring regular brake fluid changes. Body stability control and anti-lock brake functions require separate ABS or ESC systems, resulting in a low level of integration of the entire braking system.

[0003] Although one-box systems offer improved integration compared to EHB systems, they still rely on the use of brake fluid and lines, which presents a delay in response and potential risk points for failure associated with the transmission of media.

[0004] The further developed EMB (electro-mechanical brake system) has better integrated controllability and braking effect, completely eliminating the need for the bulky oil passages and related mechanisms of hydraulic braking, making the installation angle and position more convenient and eliminating the need to design the exhaust port position. Without hydraulic fluid, the motor directly drives the gear mechanism, which in turn drives the braking friction block, resulting in faster response speed, better braking performance, and easier maintenance. Furthermore, an integrated controller drives the EMB actuator, eliminating the need for external mechanisms and enabling anti-lock braking (ABS), traction control (TCS), vehicle stability control (ESC), and automatic emergency braking (AEB). It boasts a high degree of mechatronic integration and excellent stability.

[0005] The core component of the EMB system is the motor gear transmission structure. Currently, the axial installation space of the EMB system implementation unit released by many manufacturers is relatively large, and there is no integrated parking mechanism, so the parking function cannot be realized, and the parking brake caliper and mechanism must be installed separately, which causes a lack of installation space, and the system structure is relatively complex and the cost is relatively high.

[0006] The EMB system integrated parking mechanism adopted by some manufacturers has a parking brake mechanism that consists of a ratchet mechanism and a lever mechanism, and is reset by a spring. This makes the structure complicated, and in the actual operation process, the ratchet pawls sometimes cannot be precisely engaged, which reduces the service life of the mechanism.

[0007] In EMB braking systems, the motor in the execution unit is used for both driving and parking braking, so the motor generally needs to be designed with a relatively high power, has a relatively large volumetric weight, high energy consumption, and generates a lot of heat. During continuous braking, thermal energy from the brake disc is transferred by the brake block to the brake caliper and then to the motor body, which then adds to the operating heat of the motor itself, easily causing the motor temperature to rise too high. High temperatures can cause the motor's magnet temperature to rise, and in serious cases, permanent demagnetization of the magnetic material. At the same time, the motor's internal resistance also increases, increasing voltage drop and copper consumption, thereby affecting the motor's output power.

[0008] The increased motor volume and weight, the material of the power unit case, and the mounting and fixing of the power unit and brake caliper directly affect the reliability of the system. To address this issue, conventional systems use an EPB power unit, but the commonly used two-point fixing method for this unit does not meet the reliability standards required for an EMB power unit. Summary of the Invention

[0009] To solve the above problems, the present invention provides an electronic control execution unit for a brake-by-wire system and its application, which eliminates the hydraulic system and directly integrates the motor into the brake caliper. When braking is required, the system controller ECU controls the motor to generate braking force, completing the function realization and realizing full electrical control of braking. The long pipeline working time of the hydraulic system is eliminated, thereby achieving faster braking response.

[0010] To achieve the above object, the present invention provides an electronic control execution unit for a brake-by-wire system, comprising: a body; and a permanent magnet brushless DC motor and a reduction-torque-increasing gearset integrated within the body, wherein the permanent magnet brushless DC motor comprises a stator module and a rotor module, the rotor module is connected to one end of the motor shaft, the other end of the motor shaft is connected to an input end of the reduction-torque-increasing gearset, and the output end of the reduction-torque-increasing gearset is connected to an output shaft, and the output shaft protrudes from the body.

[0011] Preferably, the rotor module is interference fitted with the motor shaft, and the motor shaft is interference fitted or keyed with the parking lock electromagnetic module.

[0012] The parking lock electromagnetic module is keyed or interference-fitted to the motor shaft and includes a demagnetized lock plate, a lock plug, and a lock mounting case. The lock plate has a positioning hole on the outer periphery, and the lock plug is installed in correspondence with the positioning hole. The lock plug is installed inside the lock mounting case so as to be slidable vertically.

[0013] The locking plug is an electromagnetic plug, which is electrically connected to the power line via a connecting end provided on the locking mounting case and a signal collecting chip and connector provided on the inner wall of the fuselage, and the connector is also electrically connected to the stator module via the power line.

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

[0015] Preferably, the reduction torque increasing gear set includes an input gear connected to the motor shaft, a dual gear meshing with the input gear, and an output gear meshing with the dual gear, the output gear being connected to the output shaft.

[0016] The input gear is connected to the motor shaft via an involute backlash-less spline, or the input gear and the motor shaft are interference-fitted, or the input gear and the motor shaft are integrally molded.

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

[0018] Preferably, the double gear is rotatably mounted on the outside of the core shaft, and the core shaft is fixed inside the fuselage.

[0019] The double gear includes a top gear and a bottom gear that are integrally formed, 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, top gear, bottom gear and output gear increases sequentially.

[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 hole is provided on the inner peripheral surface of the shaft sleeve for storing oil.

[0022] Preferably, the output gear has a central hole provided with an internal involute spline, which is adapted to engage with an external involute spline on the shaft end of the output shaft.

[0023] An elastic stop ring is arranged on the outer circumferential side after one end of the output shaft protrudes from the output gear, and the other end of the output shaft passes through the machine body, and the output shaft between the machine body and the output gear is rotatably connected to the inside of the machine body by a bearing.

[0024] Preferably, a magnetic ring module used to detect the position of the motor shaft via a pin shaft is connected to the end of the motor shaft that passes through the input gear, and a positioning ring used to prevent the magnetic ring module from moving up and down is arranged at a position corresponding to the pin shaft, and the inside of the magnetic ring module is engaged with the pin shaft via the positioning ring.

[0025] The magnetic ring module is a sensor magnetic ring composed of at least one pair of magnetic poles, and the sensor magnetic ring is electrically connected to a signal line via a connector provided on the body wall of the aircraft.

[0026] Preferably, the fuselage is a sealed structure consisting of a main body, an upper cover, and an end cap, and a cover plate is provided between the upper cover and the main body to prevent oil and grease from splashing and leaking between the reduction torque increasing gear set, and the cover plate is connected to the main body via a screw.

[0027] A sealed mounting cavity is formed between the cover plate, body, and end cap, and a permanent magnet brushless DC motor and a reduction torque increasing gear set are mounted within the sealed mounting cavity.

[0028] A sealing ring is disposed between the top cover and the main body, and between the end cap and the main body, or a sealant is applied, and the top cover and the main body, and the end cap and the main body are connected by screws or sealant.

[0029] The top cover is made of pressed aluminum.

[0030] Preferably, the end cap is disposed corresponding to one end of the motor shaft remote from the reduction torque increasing gear set, and a wave spring is provided between the motor shaft and the inner wall of the end cap for vibration damping and adjusting the axial clearance of the motor shaft.

[0031] An automobile brake adapted with an electronic control execution unit of a brake-by-wire system, in which the electronic control execution units of the brake-by-wire system are symmetrically arranged on both sides of the automobile tire, and the electronic control execution units of the brake-by-wire system and the brake caliper are attached at three points. After passing through the fuselage, the output shaft is connected to an internal spline at the end of the brake caliper by an external spline or an involute spline.

[0032] The present invention has the following beneficial effects. 1. The permanent magnet brushless DC motor and the deceleration torque increasing gear are assembled into an integrated molded body, which has the advantages of high installation precision and a compact structure. The permanent magnet brushless DC motor can directly drive the deceleration torque increasing gear set to achieve deceleration and torque output, improving transmission efficiency. 2. The driving brake and parking brake functions are integrated, the integration is relatively high, and the actuator is not limited by the outer diameter of the brake caliper cylinder, so it can be used with brake calipers of various sizes. 3. The permanent magnet brushless DC motor is adopted, which can have a relatively large torque output, a relatively long motor service life, and a relatively low noise level. In summary, the actuator as a whole has the features of a compact mechanism, small volume, light weight, good heat dissipation, and ease of fixed installation.

[0033] The following will further describe the technical solution of the present invention in detail with the drawings and examples. [Brief explanation of the drawings]

[0034] [Figure 1] 1 is a cross-sectional view of an electronic control execution unit of a brake-by-wire system according to the present invention. [Figure 2] 1 is a structural schematic diagram of a parking lock electromagnetic module of an electronic control execution unit of a brake-by-wire system according to the present invention; FIG. [Figure 3] FIG. 2 is a double gear assembly diagram of the electronic control execution unit of the brake-by-wire system according to the present invention. [Figure 4] 1 is a structural schematic diagram of a magnetic ring module of an electronic control execution unit of a brake-by-wire system according to the present invention; FIG. [Figure 5] FIG. 2 is an application assembly diagram of the electronic control execution unit of the brake-by-wire system according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0035] In order to make the objectives, technical solutions, and advantages disclosed in the embodiments of the present invention more clearly understood, the embodiments of the present invention will be described in more detail below in combination with the accompanying drawings and embodiments. It should be noted that the specific embodiments described in this specification are merely for the purpose of explaining the embodiments of the present invention and do not limit the embodiments of the present invention. It should be noted that all other embodiments obtained by those skilled in the art based on the embodiments described in this specification without any creative work are within the scope of protection of this specification. It should be noted that in the examples of the embodiments described in this specification, the same or similar reference numerals throughout indicate the same or similar components or components having the same or similar functions.

[0036] The terms "comprise" and "have" and variations thereof are intended to cover non-exclusive inclusions, such as that a process, method, system, product, or server comprising a series of steps or units need not be limited to the explicitly listed steps or units, but may include other steps or units not explicitly listed or inherent to the process, method, product, or apparatus.

[0037] Similar symbols and letters indicate similarity in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and interpreted in subsequent drawings.

[0038] In describing the present invention, the orientations or positional relationships indicated by the terms "upper," "lower," "inner," and "outer" are based on the orientations or positional relationships shown in the drawings or are orientations or positional relationships commonly used when using the invention product, and are intended solely to facilitate and simplify the description of the present invention, and do not indicate or imply that a device or element must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be understood as limiting the present invention.

[0039] In the description of the present invention, unless otherwise expressly specified and limited, the terms "provide," "attach," and "connect" shall be interpreted in a broad sense, such as fixed connection, detachable connection, or integral connection. It may be either a mechanical connection or an electrical connection. It may be a direct connection, an indirect connection via an intermediate medium, or internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention depending on the specific situation.

[0040] As shown in Figures 1 to 5, the electronic control execution unit of the brake-by-wire system includes a body 1, and a permanent magnet brushless DC motor 2 and a reduction torque increasing gearset 3 integrated inside the body 1, where the permanent magnet brushless DC motor 2 includes a stator module 21 and a rotor module 22, the rotor module 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 reduction torque increasing gearset 3, the output end of the reduction torque increasing gearset 3 is connected to an output shaft 4, and the output shaft 4 protrudes from the body 1.

[0041] Specifically, the rotor module 22 is interference-fitted with the motor shaft 23. During operation, the motor shaft 23 rotates synchronously with the rotor module 22, and the motor shaft 23 is interference-fitted or keyed with the parking lock electromagnetic module 5. The parking lock electromagnetic module 5 includes a lock plate 51 that is keyed or interference-fitted with the motor shaft 23 and has undergone demagnetization (because the lock plate 51 is close to the rotor module 22, the lock plate 51 is demagnetized or made of a non-magnetic material to prevent the lock plate 51 from affecting the rotor components), a lock plug, and a lock mounting case 53. The lock plate 51 has a locating hole 511 on its outer periphery. In this embodiment, the lock plate 51 has a plurality of locating holes 511 evenly distributed around its outer periphery. The lock plugs 52 are located corresponding to the locating holes 511 and are slidable vertically within the lock mounting case 53. The lock plugs 52 are electromagnetic plugs. The electromagnetic plug is electrically connected to the power line via a connection end on the lock mounting case 53, a signal collection chip 6 on the inner wall of the machine body 1, and a connector 7, which is also electrically connected to the stator module 21 via a power line. The connector 7 communicates with an external controller and further controls the forward and reverse rotation of the motor according to the braking needs of the entire vehicle, thereby achieving vehicle braking deceleration and stopping through the clamping and releasing operations of the brake caliper 9. At the same time, the lock plug shaft is inserted into the positioning hole 511 of the lock plate to prevent the lock plate and motor shaft 23 from rotating freely, thereby locking the motor and completing the vehicle parking function.

[0042] Preferably, an anti-rotation boss 531 is fixed to the outer wall of the lock mounting case 53, and an anti-rotation groove is opened at a position corresponding to the anti-rotation boss 531 on the inner wall of the machine body 1, and the anti-rotation boss 531 extends into the anti-rotation groove to prevent the parking lock electromagnetic module 5 from rotating during the up and down movement process.

[0043] Preferably, the reduction-torque-increasing gear set 3 includes an input gear 31 connected to the motor shaft 23, a double gear 32 meshing with the input gear 31, and an output gear 33 meshing with the double 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-less spline, or the input gear 31 and the motor shaft 23 are interference-fitted, or the input gear 31 and the motor shaft 23 are integrally molded. The input gear 31, the double gear 32, and the output gear 33 are all spur gears or helical gears.

[0044] Preferably, the double gear 32 is rotatably mounted on the outside of the core shaft 34, which is fixed inside the machine body 1. The double gear 32 includes a top gear 321 and a bottom gear 322 that are integrally formed. The top gear 321 meshes with the output gear 33, and the bottom gear 322 meshes with the input gear 31, and the numbers of teeth of the input gear 31, top gear 321, bottom gear 322, and output gear 33 increase sequentially. 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 hole is formed on the inner surface of the shaft sleeve to store grease.

[0045] Preferably, an internal involute spline is provided in the center hole of the output gear 33, and the internal involute spline is configured to engage with an external involute spline at the end of the output shaft 4 to achieve torque transmission. This spline engagement design can transmit relatively large torque and is more suitable for forward and reverse motion transmission. An elastic stop ring is disposed on the outer periphery of one end of the output shaft 4 after protruding from the output gear 33, and the other end of the output shaft 4 passes through the machine body 1, and the output shaft 4 between the machine body 1 and the output gear 33 is rotatably connected to the inside of the machine body 1 by a bearing.

[0046] Preferably, a magnetic ring module 8 used to detect the position (phase angle) of the motor shaft 23 is connected via a pin shaft to the end of the motor shaft 23 that passes through the input gear 31, and a positioning ring used to prevent the magnetic ring module 8 from moving up and down is disposed at a position corresponding to the pin shaft, and the inside of the magnetic ring module 8 is engaged with the pin shaft via the positioning ring. The magnetic ring material is pre-injected onto the pin shaft before being magnetized. The magnetic ring module 8 is a sensor magnetic ring composed of at least one pair of magnetic poles, and the sensor magnetic ring is electrically connected to a signal line via a connector 7 provided on the inner wall of the aircraft body 1.

[0047] Preferably, the vehicle body 1 has a sealed structure composed of a main body 11, a top cover 12, and an end cap 13. A cover plate is provided between the top cover 12 and the main body 11 to prevent oil from splashing or leaking between the reduction-torque-increasing gear set 3 and the end cap 13. The cover plate is connected to the main body 11 with screws. This not only ensures that oil does not overflow from the gears, but also prevents foreign objects from entering and isolates gear meshing noise, ensuring a comfortable vehicle experience for the electronic control execution unit of the brake-by-wire system. A sealed mounting cavity is formed between the cover plate, the main body 11, and the end cap 13, and the permanent magnet brushless DC motor 2 and the reduction-torque-increasing gear set 3 are mounted in the sealed mounting cavity. A sealing ring or sealant is disposed between the top cover 12 and the main body 11, and between the end cap 13 and the main body 11. The top cover 12 and the main body 11 and the end cap 13 and the main body 11 are connected with screws or sealant. The top cover 12 is made of pressed aluminum, which provides excellent heat dissipation. At the same time, the main body 11 is made of die-cast aluminum alloy, which not only ensures strength and light weight, but also provides better heat dissipation for the motor.

[0048] Preferably, the end cap 13 is disposed at one end of the motor shaft 23 that is farther away from the reduction torque increasing gear set 3, and a wave spring 131 is provided between the motor shaft 23 and the inner wall of the end cap 13 to damp vibrations and adjust the axial clearance of the motor shaft 23.

[0049] In the application of the electronic control execution unit of the brake-by-wire system to the brakes of an automobile, the electronic control execution units of the brake-by-wire system are symmetrically arranged on both sides of the automobile tire, and the electronic control execution unit of the brake-by-wire system and the brake caliper 9 are attached at three points. After passing through the body 1, the output shaft 4 is connected to the internal spline at the end of the brake caliper 9 by an external spline or an involute spline.

[0050] Therefore, the present invention adopts the electronic control execution unit of the brake-by-wire system and its application, and assembles the permanent magnet brushless DC motor and the reduction torque increasing gear into an integrally molded body, which has the advantages of high installation precision and a compact structure. The permanent magnet brushless DC motor can directly drive the reduction torque increasing gear set to perform deceleration and torque output, improving transmission efficiency.

[0051] Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention, and are not intended 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 the technical solutions of the present invention may still be modified or equivalently substituted, and these modifications or equivalent substitutions shall not cause the modified technical solutions to depart from the spirit and scope of the technical solutions of the present invention. [Explanation of symbols]

[0052] 1 machine body, 11 main body, 12 top cover, 13 end cap, 131 wave spring, 2 permanent magnet brushless DC motor, 21 stator module, 22 rotor module, 23 motor shaft, 3 reduction torque increasing 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 module, 51 lock plate, 511 positioning hole, 52 lock plug, 53 lock mounting case, 531 anti-rotation boss, 6 signal collection chip, 7 connector, 8 magnetic ring module, 9 brake caliper

Claims

1. An electronic control execution unit for a brake-by-wire system, The aircraft includes a permanent magnet brushless DC motor and a reduction torque increase gear set integrated inside the aircraft. wherein the permanent magnet brushless DC motor includes a stator module and a rotor module, the rotor module is connected to one end of a motor shaft, the other end of the motor shaft is connected to an input end of a reduction torque increasing gearset, the output end of the reduction torque increasing gearset is connected to an output shaft, and the output shaft protrudes from the body; the rotor module is interference fitted with the motor shaft, and the motor shaft is interference fitted or keyed with a parking lock electromagnetic module; The parking lock electromagnetic module is keyed or interference-fitted to the motor shaft and includes a demagnetized lock plate, a lock plug, and a lock mounting case, the lock plate having a positioning hole on the outer periphery, the lock plug corresponding to the positioning hole, and the lock plug being slidable vertically within the lock mounting case; the lock plug is an electromagnetic plug, the electromagnetic plug is electrically connected to a power line via a connection end provided on the lock mounting case and a signal collection chip and connector provided on the inner wall of the fuselage, and the connector is also electrically connected to a stator module via the power line.

2. 2. The electronic control execution unit of a brake-by-wire system according to claim 1, wherein an anti-rotation boss is fixed to an outer wall of the lock mounting case, and an anti-rotation groove is formed on the inner wall of the fuselage at a position corresponding to the anti-rotation boss, the anti-rotation boss extending into the anti-rotation groove, and used to prevent the parking lock electromagnetic module from rotating during up-down movement.

3. the reduction torque increasing 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 being connected to the output shaft; the input gear is connected to the motor shaft via an involute backlash-less spline, or the input gear and the motor shaft are interference-fitted, or the input gear and the motor shaft are integrally molded, 2. The electronic control execution unit for a brake-by-wire system according to claim 1, wherein the input gear, the double gear and the output gear are all spur gears or helical gears.

4. The double gear is rotatably mounted on the outside of a core shaft, and the core shaft is fixed to the inside of the machine body; The double gear includes a top gear and a bottom gear which are integrally formed, the top gear meshes with the output gear, and the bottom gear meshes with the input gear, and the numbers of teeth of the input gear, the top gear, the bottom gear and the output gear increase sequentially; 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; 4. The electronic control execution unit for a brake-by-wire system according to claim 3, wherein an annular oil hole for storing oil is provided on the inner peripheral surface of the shaft sleeve.

5. an internal involute spline is provided in a central hole of the output gear, the internal involute spline being adapted to engage with an external involute spline on a shaft end of the output shaft; 4. The electronic control execution unit of a brake-by-wire system according to claim 3, wherein an elastic stop ring is arranged on an outer circumferential side after one end of the output shaft protrudes from the output gear, the other end of the output shaft passes through the vehicle body, and the output shaft between the vehicle body and the output gear is rotatably connected to the inside of the vehicle body by a bearing.

6. A magnetic ring module used to detect the position of the motor shaft is connected to the end of the motor shaft that passes through the input gear via a pin shaft, and a positioning ring used to prevent the magnetic ring module from moving up and down is arranged at a position where the pin shaft corresponds to the magnetic ring module, and the inside of the magnetic ring module is engaged with the pin shaft via the positioning ring, 4. The electronic control execution unit of a brake-by-wire system according to claim 3, wherein the magnetic ring module is a sensor magnetic ring composed of at least one pair of magnetic poles, and the sensor magnetic ring is electrically connected to a signal line via the connector provided on the inner wall of the aircraft.

7. The machine body has a sealed structure consisting of a main body, a top cover and an end cap. A cover plate is provided between the top cover and the main body to prevent oil from splashing and leaking between the reduction torque increasing gear set. The cover plate is connected to the main body via a screw. a sealed mounting cavity is formed between the cover plate, the body, and the end cap, and the permanent magnet brushless DC motor and the reduction torque increasing gear set are mounted in the sealed mounting cavity; A sealing ring is disposed between the top cover and the main body, and a sealant is applied between the end cap and the main body, and the top cover and the main body are connected by screws or a sealant, and the end cap and the main body are connected by screws or a sealant.

2. The electronic control execution unit for a brake-by-wire system according to claim 1, wherein the upper cover is made of pressed aluminum.

8. 8. The electronic control execution unit of a brake-by-wire system according to claim 7, wherein the end cap is disposed corresponding to one end of the motor shaft remote from the reduction-torque-increasing gear set, and a wave spring is provided between the motor shaft and an inner wall of the end cap for vibration damping and adjusting an axial clearance of the motor shaft.

9. An automobile brake incorporating an electronic control execution unit for a brake-by-wire system according to any one of claims 1 to 8, The electronic control execution units of the brake-by-wire system are symmetrically arranged on both sides of the vehicle tire, and the electronic control execution units of the brake-by-wire system and the brake calipers are mounted in a three-point manner; The automobile brake, characterized in that the output shaft after passing through the aircraft body is connected to an internal spline at the end of the brake caliper via an external spline or an involute spline.

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