Integrated electromechanical brake device
By integrating an electromechanical braking system, the problem of chassis space limitations is solved, achieving a compact braking system design with driving and parking functions, improving space utilization and service life, reducing noise, and making it suitable for new energy vehicles.
Patent Information
- Application Number
- CN202422831254.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-11-20
AI Technical Summary
Existing electromechanical braking devices are large in size due to chassis installation space limitations, lack parking brake function, and require an external ECU, resulting in low space utilization.
An integrated electromechanical braking device is designed, including a mounting bracket, a brake caliper assembly, and an MGU assembly. The MGU assembly includes an electronic control unit, a deceleration and torque extension unit, and a parking unit. The electronic control unit is connected to the deceleration and torque extension unit, and the parking unit is integrated to realize braking force deceleration and torque extension and parking braking without the need for an additional ECU.
It achieves high-efficiency braking performance in a limited space, and has both driving and parking braking functions, which improves space utilization, reduces overall size and noise, and increases service life and energy saving.
Smart Images
Figure CN223725233U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to an integrated electronic mechanical brake device and belongs to the technical field of brake equipment. BACKGROUND
[0002] With the development of automobile electrification and intelligence and the rise of electric vehicles and automatic driving technology, higher requirements are put forward for brake systems, and EMB technology emerges as the times require. In recent years, EMB products have been trial-produced and road-tested by many domestic and foreign automobile manufacturers and brake manufacturers. Compared with traditional hydraulic brake systems, the line-controlled electronic mechanical brake (EMB) system has high energy efficiency, high brake precision, fast response time and shorter brake distance, and is more suitable for the technical development needs of new energy vehicles in terms of full electrification and intelligence, and can be more closely integrated with other vehicle systems to realize higher-level vehicle dynamic control and automatic driving.
[0003] In the prior art, due to the limitation of the space arranged between the steering wheel hub of the vehicle chassis and the drive shaft, the overall volume of the EMB, especially the axial dimension, needs to be compact under the premise of ensuring brake performance. The existing published EMB structure has a large size of the driving part, does not integrate the parking brake function, and the parking mechanism in some patents is relatively complex. Moreover, the existing electronic mechanical brake needs to be connected to an additional external ECU electronic control unit, and the space utilization rate is low. Therefore, an electronic mechanical brake device is needed to solve the problems of the existing technology, such as large overall volume, lack of parking brake function, and low space utilization rate caused by external connection of the ECU. CONTENT OF THE UTILITY MODEL
[0004] In view of the problems and deficiencies in the prior art, the application provides an integrated electronic mechanical brake device to solve the above technical problems.
[0005] To achieve the above purpose, the application provides the following technical scheme: an integrated electronic mechanical brake device, comprising a mounting frame, a brake caliper body assembly and an MGU assembly, the MGU assembly comprising an electronic control unit, a speed reduction and distance increasing unit and a parking unit; the brake caliper body assembly is provided with a brake caliper body, and the brake caliper body is slidingly installed on the mounting frame; the speed reduction and distance increasing unit comprises a power shaft and a speed reduction gear set; the electronic control unit comprises a control assembly, a brake motor and a parking power member; one end of the power shaft is connected with the brake motor through the speed reduction gear set, and the other end serves as a power output end and is connected with the brake caliper body; one end of the parking unit is connected with the parking power member, and the other end is connected with the power shaft to limit the rotational movement of the power shaft; the brake motor and the parking power member are electrically connected with the control assembly respectively.
[0006] Specifically, the mounting frame is provided with a mounting shell, two mounting cavities are arranged in the mounting shell, and a partition plate is arranged between the two mounting cavities; the control assembly is mounted in one of the two mounting cavities to form a first mounting cavity, and the deceleration and distance increasing unit and the parking unit are mounted in the other mounting cavity to form a second mounting cavity; an axle hole is arranged on one side of the mounting shell of the second mounting cavity, used for the power shaft to extend out, and the brake caliper body assembly is mounted on the side of the axle hole of the second mounting cavity.
[0007] Specifically, the deceleration gear set is a planetary deceleration gear set, and the deceleration ratio range is 10-80, which includes a sun gear, an inner ring gear and a planetary gear set; the sun gear, the inner ring gear and the planetary gear set are made of powder metallurgy material or powder metallurgy material and plastic material; the planetary gear set includes a planet carrier and a plurality of planetary gears; a plurality of planetary gear mounting cavities are uniformly distributed in the planet carrier along the circumference, a planet pin is arranged in the planetary gear mounting cavity, and a planetary gear is rotatably mounted on the planet pin through a bearing; the inner ring gear is fixedly mounted on the mounting frame, the planet carrier is rotatably mounted on the inner ring gear by engaging the inner ring gear with the inner ring gear of the inner ring gear through a plurality of planetary gears; the sun gear is rotatably mounted on the planet carrier by engaging with a plurality of planetary gears; the power shaft is mounted on the frame body away from the planet carrier; one end of the sun gear is connected with the brake motor.
[0008] Specifically, the sun gear is a double gear structure, including a first gear and a second gear formed integrally, and the first gear is made of plastic material and the second gear is made of metal material; a driving gear is fixedly mounted on the power end of the brake motor, and the brake motor is engaged with the first gear through the driving gear and the idler gear arranged between the driving gear and the first gear; the second gear is engaged with a plurality of planetary gears.
[0009] Specifically, the parking unit includes a ratchet wheel and a pawl; the pawl is mounted on the mounting frame, and one end thereof is connected with the power end of the parking power piece; the ratchet wheel is fixedly mounted on the planet carrier through a wheel body and is connected with the power shaft.
[0010] Specifically, the control assembly is provided with an ECU circuit board, and the ECU circuit board is mounted in the first mounting cavity; the axle hole of the second mounting cavity is provided with mounting holes on both sides thereof, respectively used for mounting the brake motor and the parking power piece.
[0011] Specifically, the parking power piece is a parking electromagnet, including an electromagnetic coil, a push rod motor, a push rod and an electromagnet; the electromagnetic coil and the push rod motor are integrated as a whole, the push rod is connected with the power end of the push rod motor, and the electromagnet is mounted on the end of the push rod; the pawl is rotatably mounted on the mounting frame, one end thereof faces the electromagnet to form a magnetic attraction end, and the other end is provided with a pawl structure to form a locking end.
[0012] Specifically, the pawl includes a first pawl body, a second pawl body, a rotating shaft and a torsion spring; the rotating shaft is fixedly installed on the mounting bracket, the torsion spring is sleeved on the rotating shaft, one end of the first pawl body and the second pawl body is respectively hinged to the rotating shaft, and the torsion spring is arranged between the first pawl body and the second pawl body; the second pawl body is limited by the limiting pin on the mounting bracket, forming a fixed end; the end of the first pawl body is provided with a pawl structure, forming a locking end, and the fixed end is located in the movement track of the push rod.
[0013] Specifically, the brake caliper body assembly includes a caliper body support, a sliding rail, a ball screw pair, a piston and a brake pad; the sliding rail is fixedly installed on the caliper body support, the brake caliper body is slidingly installed on the sliding rail, and one end thereof is fixedly connected with the nut end of the ball screw pair through the piston; the screw rod of the ball screw pair is rotatably installed on the mounting bracket, and one end thereof is connected with the power shaft; the brake pad is fixedly installed on the brake caliper body.
[0014] Specifically, the first gear and the second gear of the sun gear and the power shaft are coaxial; the driving gear and the power end of the brake motor are coaxial; the brake motor, the idler gear and the sun gear are arranged in parallel; the idler gear and the inner ring are made of plastic material.
[0015] Compared with the prior art, the beneficial effects of the present application are:
[0016] 1. The present application integrates the brake caliper body assembly and the MGU assembly on the mounting bracket, wherein the MGU assembly includes an electronic control unit, a speed reduction and distance increasing unit and a parking unit, the parking unit includes a ratchet and a pawl, and the speed reduction and distance increasing unit includes a power shaft and a speed reduction gear set; the brake motor of the electronic control unit is connected with the speed reduction and distance increasing unit, used for reducing and increasing the brake force of the brake motor, thereby driving the brake caliper body of the brake caliper body assembly to slide along the mounting bracket to perform service brake. At the same time, the ratchet of the parking unit is installed on the power shaft, so that the electronic control unit drives the pawl to lock the ratchet, thereby achieving the effect of parking brake. The electronic mechanical brake device of the present application integrates the ECU control assembly, without the need of connecting additional ECU, effectively improving the space utilization rate of the vehicle chassis, and meeting the service brake requirement while having the parking brake function.
[0017] 2. On the basis of the foregoing, the mounting bracket of the electronic mechanical brake device of the present application is provided with a mounting shell, two mounting cavities are arranged in the mounting shell, the control assembly is installed in one of the mounting cavities to form a first mounting cavity, the speed reduction and distance increasing unit and the parking unit are installed in the other mounting cavity to form a second mounting cavity, and a partition plate is arranged between the two mounting cavities, so that the mechanical part grease of the speed reduction and distance increasing unit and the parking unit can be isolated from the ECU circuit board through the partition plate, thereby protecting the control assembly.
[0018] 3. On the basis of the foregoing, the speed reduction gear set of the electronic mechanical brake device of the application is a planetary speed reduction gear set, which comprises a sun gear, an inner ring gear and a planetary gear set comprising a plurality of planetary gears, wherein the sun gear is a double gear structure comprising a first gear and a second gear, a driving gear is fixedly installed on the power end of the brake motor, the brake motor is engaged with the first gear through the driving gear and an idler gear arranged between the driving gear and the first gear, the second gear acts as a sun gear and is engaged with the planetary gear set to drive the planetary carrier of the planetary gear set to rotate and drive the power shaft to output power. At the same time, the driving gear and the power end of the brake motor are arranged in one body, and the sun gear adopts a double gear structure to reduce the possibility of slippage or movement of the driving gear, the power end of the brake motor, the first gear and the second gear when they are matched. The ratchet is arranged in the middle of the double gear, and the inner ring gear and the planetary carrier form the meshing space of the planetary gear through fixed connection, so that additional axial arrangement space is not required for the parking ratchet, thereby greatly reducing the axial size of the MGU assembly.
[0019] 4. On the basis of the foregoing, the first gear, the second gear and the power shaft of the sun gear of the application are coaxial; the driving gear and the power end of the brake motor are coaxial; the axes of the brake motor, the idler gear and the sun gear are arranged parallel to each other to save axial space and make the overall structure of the electronic mechanical brake device compact and occupy small space.
[0020] 5. On the basis of the foregoing, the parking unit of the electronic mechanical brake device of the application adopts a parking electromagnet, and the pawl comprises a first pawl body, a second pawl body, a rotating shaft and a torsion spring, one end of the first pawl body and the second pawl body is respectively hinged to the rotating shaft, and the torsion spring is arranged between the first pawl body and the second pawl body, the second pawl body is limited by a limiting pin and arranged on the mounting frame to form a fixed end, the end of the first pawl body is provided with a pawl structure to form a locking end, and the fixed end is located in the movement track of the push rod to realize that when the parking electromagnet contacts the second pawl body, the first pawl body is magnetically attracted by the electromagnet and moves away from the ratchet to release the parking brake, and vice versa, the first pawl body is driven by the elastic force of the torsion spring to lock the pawl structure on the ratchet to realize the function of the parking brake. The parking unit of the application responds quickly, uses magnetic attraction to drive the pawl to move, has small component wear and long service life. The parking mechanism can realize double holding force design during driving and parking, and can realize long-term force holding through its own mechanical structure during driving and parking, and the electromagnet does not need continuous power supply, which is energy-efficient.
[0021] 6. On the basis of the foregoing, the speed reduction and distance increasing unit of the MGU assembly of the application has a large adjustable range of speed reduction ratio, can realize the brake force adjustment requirement of different tonnage vehicles, and the designed speed reduction gear set adopts a combination of powder metallurgy or powder metallurgy and plastic gear to meet the design requirement of low noise of vehicles, especially new energy vehicles. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the integrated electromechanical braking device in this embodiment;
[0023] Figure 2 This is an exploded view of the integrated electromechanical braking device in this embodiment;
[0024] Figure 3 This is a schematic diagram of the MGU component of the integrated electromechanical braking device in this embodiment;
[0025] Figure 4 This is an exploded view of the MGU component of the integrated electromechanical braking device in this embodiment;
[0026] Figure 5 This is a schematic diagram of the brake caliper assembly of the integrated electromechanical braking device in this embodiment. Detailed Implementation
[0027] The present application will be further described below with reference to the accompanying drawings in the embodiments thereof.
[0028] Please see Figures 1-5 This embodiment discloses an integrated electromechanical braking device, including a mounting bracket, a brake caliper assembly 2, and an MGU assembly 1. The MGU assembly 1 includes an electronic control unit, a deceleration and torque-increasing unit, and a parking unit. The brake caliper assembly 2 is provided with a brake caliper 2-0, which is slidably mounted on the mounting bracket. The deceleration and torque-increasing unit includes a power shaft 1-19 and a reduction gear set. The electronic control unit includes a control component, a brake motor 1-4, and a parking power component. The parking unit includes a ratchet 1-9 and a pawl. One end of the power shaft is connected to the brake motor via the reduction gear set, and the other end is connected to the brake caliper as a power output end. The ratchet 1-9 is connected to the power shaft 1-19, and the pawl is mounted on the mounting bracket, with one end connected to the power end of the parking power component. The brake motor and the parking power component are electrically connected to the control component.
[0029] Further, the mounting frame is provided with a mounting shell, two mounting cavities are arranged in the mounting shell, and a partition plate is arranged between the two mounting cavities; the control assembly is mounted in one of the mounting cavities to form a first mounting cavity, and the control assembly of the embodiment is provided with an ECU circuit board 1-3, the ECU circuit board 1-3 is mounted in the first mounting cavity, and a mounting shell cover plate 1-1 is arranged on the outer side of the first mounting cavity to form a closed mounting cavity. The deceleration and distance increasing unit and the parking unit are mounted in the other mounting cavity to form a second mounting cavity; an axle hole is arranged on the mounting shell on one side of the second mounting cavity, used for the power shaft to extend out, the brake caliper body assembly is mounted on the side of the axle hole of the second mounting cavity, and mounting holes are arranged on both sides of the axle hole of the second mounting cavity of the embodiment, respectively used for mounting a brake motor 1-4 and a parking power piece.
[0030] The planetary gear set of the embodiment is a planetary reduction gear set, and the reduction ratio range is 10-80, which includes a sun gear 1-7, an inner ring gear 1-17 and a planetary gear set; the sun gear, the inner ring gear and the planetary gear set are made of a powder metallurgy material or a powder metallurgy material and a plastic material; the planetary gear set includes a planet carrier 1-18 and a plurality of planetary gears 1-15; a plurality of planetary gear mounting cavities are uniformly distributed in the planet carrier 1-18 along the circumference, a planet pin 1-16 is arranged in the planetary gear mounting cavity, and a planetary gear 1-15 is rotatably mounted on the planet pin 1-16 through a bearing; the inner ring gear 1-17 is fixedly mounted on the mounting frame, the planet carrier is rotatably mounted on the inner ring gear through a plurality of planetary gears and an inner side gear of the inner ring gear; the sun gear 1-7 is rotatably mounted on the planet carrier through engagement with a plurality of planetary gears; a power shaft 1-19 is mounted on the side of the planet carrier away from the planetary gears; one end of the sun gear is connected with the power end of the brake motor.
[0031] In addition, the sun gear 1-7 of the embodiment is a double gear structure, including a first gear and a second gear formed integrally; the first gear is made of a plastic material, and the second gear is made of a metal material; a driving gear 1-20 is fixedly mounted on the power end of the brake motor, and the brake motor is engaged with the first gear through an idler gear 1-6 arranged between the driving gear and the first gear; the second gear is engaged with a plurality of planetary gears. The ratchet wheel 1-9 is fixedly mounted on the planet carrier 1-18 through the wheel body by means of a connecting bolt 1-8, and is connected with the power shaft. In addition, the first gear, the second gear and the power shaft of the sun gear of the embodiment are coaxial; the driving gear and the power end of the brake motor are coaxial; the brake motor, the idler gear and the sun gear are arranged in parallel with each other.
[0032] And the parking power element of the embodiment is a parking electromagnet 1-13, which comprises an electromagnetic coil, a push rod motor, a push rod and an electromagnet; the electromagnetic coil and the push rod motor are integrated into one body, the push rod 1-21 is connected with the power end of the push rod motor, and the electromagnet is installed at the end of the push rod; the pawl is rotatably installed on the mounting bracket, one end of the pawl faces the electromagnet to form a magnetic attraction end, and the other end of the pawl is provided with a pawl structure to form a locking end. And the pawl of the embodiment comprises a first pawl body 1-11, a second pawl body 1-12, a rotating shaft 1-10 and a torsional spring 1-14; the rotating shaft is fixedly installed on the mounting bracket, the torsional spring is sleeved on the rotating shaft, one end of the first pawl body and the second pawl body is respectively hinged to the rotating shaft, and the torsional spring is arranged between the first pawl body and the second pawl body; the second pawl body is limited by the limiting pin on the mounting bracket to form a fixed end, the end of the first pawl body is provided with a pawl structure to form a locking end, and the fixed end is located in the movement track of the push rod.
[0033] In addition, the brake caliper body assembly 2 of the embodiment comprises a caliper body support 2-5, a sliding rail, a ball screw pair, a piston 2-3 and a brake pad; the sliding rail is fixedly installed on the caliper body support 2-5, the brake caliper body 2-4 is slidingly installed on the sliding rail, one end of the brake caliper body 2-4 is fixedly connected with the nut end 2-2 of the ball screw pair through the piston 2-3, and the screw rod 2-1 of the ball screw pair is rotatably installed on the mounting bracket and connected with the power shaft at one end; the power shaft 1-19 of the embodiment adopts an external spline structure, the screw rod pair adopts an internal spline structure, the power shaft and the screw rod are connected through the spline, and the brake pad is fixedly installed on the brake caliper body 2-4.
[0034] Working principle: when the integrated electronic mechanical brake device provided by the embodiment is used, during driving brake, the control assembly controls the brake motor to start, after the motor starts, the power end of the motor drives the idler to rotate through the driving gear, the idler and the first gear of the sun gear of the double gear are meshed and rotated, and then the second gear is driven to rotate, since the second gear is respectively meshed with a plurality of planetary gears of the planetary gear set, the planetary gears are driven to rotate along the inner ring, the planet carrier is driven to rotate, and finally the power shaft is driven to output power, and the brake motor braking force is reduced and the distance is increased. The rotation of the power shaft drives the screw rod of the ball screw pair to rotate, thereby driving the nut end fixedly connected with the brake caliper body to slide along the screw rod, the brake caliper body slides along the sliding rail towards the brake disc, and the brake pad is abutted against the brake disc to brake. When parking brake is not needed, the control assembly controls the parking power element to start, the push rod motor drives the push rod to extend towards the second pawl body of the pawl, and then the battery coil starts, the electromagnet is magnetized to generate magnetic force to attract the first pawl towards the second pawl body, thereby releasing the pawl from the ratchet wheel, and the planetary gear set can rotate normally. Conversely, when parking brake is needed, the parking power element loses power, the push rod retracts, the electromagnet loses magnetism, the first pawl rotates towards the ratchet wheel under the elastic force of the torsional spring, and is abutted against the ratchet wheel to achieve locking, thereby completing parking brake.
[0035] The embodiments of the present application are described in detail above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, and for those skilled in the technical field, after learning the contents described in the present application, some equivalent transformations and substitutions can be made without departing from the principles of the present application, and these equivalent transformations and substitutions should also be considered as belonging to the protection scope of the present application.
Claims
1. An integrated electromechanical brake device comprising a mounting bracket, a brake caliper body assembly, and an MGU assembly, characterized by: The MGU assembly comprises an electronic control unit, a deceleration and distance increasing unit and a parking unit; the brake caliper body assembly is provided with a brake caliper body which is slidingly installed on a mounting rack; the deceleration and distance increasing unit comprises a power shaft and a deceleration gear set; the electronic control unit comprises a control assembly, a brake motor and a parking power piece; one end of the power shaft is connected with the brake motor through the deceleration gear set, and the other end is connected with the brake caliper body as a power output end; one end of the parking unit is connected with the parking power piece, and the other end is connected with the power shaft to limit the rotating movement of the power shaft; the brake motor and the parking power piece are electrically connected with the control assembly respectively.
2. The integrated electromechanical brake apparatus of claim 1, wherein: The mounting rack is provided with a mounting shell, two mounting cavities are arranged in the mounting shell, and a partition plate is arranged between the two mounting cavities; the control assembly is installed in one of the two mounting cavities to form a first mounting cavity, and the deceleration and distance increasing unit and the parking unit are installed in the other mounting cavity to form a second mounting cavity; a shaft hole is arranged on one side of the mounting shell of the second mounting cavity and used for the power shaft to extend out, and the brake caliper body assembly is installed on the shaft hole side of the second mounting cavity.
3. The integrated electromechanical brake apparatus of claim 1, wherein: The deceleration gear set is a planetary deceleration gear set, and the deceleration ratio range is 10-80, which comprises a sun gear, an inner ring gear and a planetary gear set; the sun gear, the inner ring gear and the planetary gear set are made of a powder metallurgy material or a powder metallurgy material and a plastic material; the planetary gear set comprises a planet carrier and a plurality of planetary gears; a plurality of planetary gear mounting cavities are uniformly distributed in the planet carrier along the circumference, a planet pin is arranged in each planetary gear mounting cavity, and a planetary gear is rotatably installed on the planet pin through a bearing; the inner ring gear is fixedly installed on the mounting rack, the planet carrier is rotatably installed on the inner ring gear by meshing with the inner ring gear of the inner ring gear through a plurality of planetary gears; the sun gear is rotatably installed on the planet carrier by meshing with a plurality of planetary gears; the power shaft is installed on the rack body away from the planet carrier; one end of the sun gear is connected with the brake motor.
4. The integrated electromechanical brake apparatus of claim 3, wherein: The sun gear is a double gear structure comprising a first gear and a second gear which are integrally formed, and the first gear is made of a plastic material and the second gear is made of a metal material; a driving gear is fixedly installed on the power end of the brake motor, and the brake motor is meshed with the first gear through an idler gear arranged between the driving gear and the first gear; the second gear is meshed with a plurality of planetary gears.
5. The integrated electromechanical brake apparatus of claim 3, wherein: The parking unit comprises a ratchet wheel and a pawl; the pawl is installed on the mounting rack, and one end thereof is connected with the power end of the parking power piece; the ratchet wheel is fixedly installed on the planet carrier through a wheel body and is connected with the power shaft.
6. The integrated electromechanical brake apparatus of claim 2, wherein: The control assembly is provided with an ECU circuit board which is installed in the first mounting cavity; the shaft hole of the second mounting cavity is provided with mounting holes on both sides thereof for mounting the brake motor and the parking power piece respectively.
7. The integrated electromechanical brake apparatus of claim 5, wherein: The parking power piece is a parking electromagnet, comprising an electromagnetic coil, a push rod motor, a push rod and an electromagnet; the electromagnetic coil and the push rod motor are integrated as a whole, the push rod is connected with the power end of the push rod motor, and the electromagnet is installed at the end of the push rod; the pawl is rotatably installed on the mounting frame, one end of the pawl faces the electromagnet to form a magnetic attraction end, and the other end is provided with a pawl structure to form a locking end.
8. The integrated electromechanical brake apparatus of claim 7, wherein: The pawl comprises a first pawl body, a second pawl body, a rotating shaft and a torsion spring; the rotating shaft is fixedly installed on the mounting frame, the torsion spring is sleeved on the rotating shaft, one end of the first pawl body and the second pawl body is respectively hinged to the rotating shaft, the torsion spring is arranged between the first pawl body and the second pawl body, the second pawl body is limited by the limiting pin on the mounting frame to form a fixed end, the end of the first pawl body is provided with a pawl structure to form a locking end, and the fixed end is located in the movement track of the push rod.
9. The integrated electromechanical brake apparatus of claim 1, wherein: The brake caliper body assembly comprises a caliper body support, a sliding rail, a ball screw pair, a piston and a brake pad; the sliding rail is fixedly installed on the caliper body support, the brake caliper body is slidingly installed on the sliding rail, one end of the brake caliper body is fixedly connected with the nut end of the ball screw pair through the piston, the screw rod of the ball screw pair is rotatably installed on the mounting frame, and one end of the screw rod is connected with the power shaft; the brake pad is fixedly installed on the brake caliper body.
10. The integrated electromechanical brake apparatus of claim 4, wherein: The first gear, the second gear and the power shaft of the sun gear are coaxially arranged; the driving gear and the power end of the brake motor are coaxially arranged; the axes of the brake motor, the idler gear and the sun gear are arranged in parallel; the idler gear and the inner ring are made of plastic material.