Integrated electronic brake device

Abstract

The invention belongs to the technical field of automobile braking, and particularly relates to an integrated electronic braking device which comprises an MGU shell. The fixed end of the motor is fixedly connected to the interior of the MGU shell; one end of the planetary mechanism gear set is in transmission connection with the motor, the other end of the planetary mechanism gear set is provided with two piston assemblies in a transmission mode, and the movable ends of the piston assemblies are matched with the brake friction plates and used for driving the brake friction plates to press or loosen the brake disc. A double-piston redundancy design mechanism is adopted, the planetary mechanism gear set drives the two pistons to conduct braking, after a single piston fails, the other piston can still achieve the braking function, and the reliability of the braking system is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile braking, and in particular relates to an integrated electronic braking device. Background Art

[0002] At present, with the development trend of automobile electrification and intelligence, the application of vehicle battery packs and intelligent equipment comfort modules has made the vehicle mass larger and larger, and the braking torque, strength and durability requirements of the braking system have become higher and higher. In order to achieve the goals of safety and durability, it is necessary to design a system structure that meets the large braking capacity.

[0003] The main problems of existing electronic mechanical brake devices are: due to the single piston structure, the friction plate is unevenly stressed, the lead screw is stressed, and the reliability and durability are poor. In addition, the thrust mechanism and the caliper of the existing electronic mechanical brake are integrated, which brings inconvenience to the manufacture and processing of the caliper. Therefore, an integrated electronic brake device is urgently needed to solve the above technical problems. Summary of the invention

[0004] The object of the present invention is to provide an integrated electronic braking device to solve the above problems.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] An integrated electronic braking device, comprising:

[0007] MGU housing;

[0008] A motor, a fixed end of which is fixedly connected to the inside of the MGU housing;

[0009] One end of the planetary mechanism gear set is connected to the motor for transmission, and the other end is driven by two piston assemblies. The movable end of the piston assembly cooperates with the brake friction pad to drive the brake friction pad to press or release the brake disc.

[0010] Preferably, the MGU housing includes a reduction mechanism housing, the planetary mechanism gear set is placed on the inner side of the reduction mechanism housing, two piston cylinders are symmetrically fixed to one side of the reduction mechanism housing, and the movable end of the piston assembly is slidably connected to the inner side of the piston cylinder.

[0011] Preferably, the planetary mechanism gear set includes a double gear set mechanism and a planetary gear set mechanism;

[0012] The dual gear set mechanism comprises a motor gear connected to the motor shaft, the motor gear is meshed with two symmetrically arranged second gears on its circumferential side, each of the second gears is meshed with a third gear on its circumferential side, and the output end of the third gear is connected to the planetary gear set mechanism shaft;

[0013] The planetary gear set mechanism includes an inner gear ring fixedly connected to the inner side of the reduction mechanism housing, the inner side of the inner gear ring is meshed with a first planetary gear, a second planetary gear, and a third planetary gear, the first planetary gear, the second planetary gear, and the third planetary gear are transmission connected to the third gear, the first planetary gear, the second planetary gear, and the third planetary gear rotate on the same planetary carrier, and the planetary carrier is transmission connected to the piston assembly.

[0014] Preferably, the piston assembly includes a ball screw, which is clearance-matched with the planetary carrier, a screw nut is slidably connected to the outer side of the ball screw, a power end of the screw nut is fixedly connected to the piston, and a ball is provided between the screw nut and the ball screw.

[0015] Preferably, an upper cover plate is fixedly connected to one end of the reduction mechanism housing away from the piston cylinder.

[0016] Preferably, a support plate is provided on one side of the output end of the motor, and the support plate is fixedly connected to the inner side of the reduction mechanism housing.

[0017] Preferably, a circuit board is provided between the upper cover plate and the support plate, an induction magnetic ring is coaxially fixedly connected to the output end of the motor, an induction magnetic ring sensor is installed on the circuit board, and the induction magnetic ring sensor cooperates with the induction magnetic ring to detect the rotation angle of the motor.

[0018] Preferably, the three-phase pins of the motor are electrically connected to the circuit board.

[0019] Preferably, a connector is provided at one end of the circuit board close to the upper cover, and the connector passes through the upper cover to be connected to the controller.

[0020] Compared with the prior art, the present invention has the following advantages and technical effects:

[0021] The present invention adopts a dual-piston redundant design mechanism, and the planetary mechanism gear set drives two pistons to brake respectively. After a single piston fails, the other piston can still realize the braking function, thereby ensuring the reliability of the braking system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a structural schematic diagram of a double gear set mechanism;

[0025] Figure 3 is a cross-sectional view of the present invention;

[0026] Among them, 1. motor; 2. planetary mechanism gear set; 4. MGU housing; 5. piston assembly; 201. planetary carrier; 202. inner ring gear; 203. baffle; 204. third gear; 205. second gear; 206. motor gear; 301. induction magnetic ring; 302. circuit board; 303. connector; 304. pin; 401. reduction mechanism housing; 402. piston cylinder; 403. support plate; 405. upper cover plate; 211. first planetary gear; 212. second planetary gear; 213. third planetary gear; 501. piston; 502. ball screw; 503. screw nut; 505. ball. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Reference Figures 1 to 3 , the present invention discloses an integrated electronic brake device, comprising: an MGU housing 4;

[0030] The motor 1, with a fixed end fixedly connected to the inside of the MGU housing 4;

[0031] One end of the planetary mechanism gear set 2 is connected to the motor 1 for transmission, and the other end is connected to two piston assemblies 5 for transmission. The movable end of the piston assembly 5 cooperates with the brake friction pad to drive the brake friction pad to press or release the brake disc.

[0032] The present invention adopts a dual-piston redundant design mechanism, and the planetary mechanism gear set 2 drives two pistons 501 to brake respectively. After a single piston 501 fails, the other piston 501 can still realize the braking function, thereby ensuring the reliability of the braking system.

[0033] According to a further optimized solution, the MGU housing 4 includes a reduction mechanism housing 401 , the planetary mechanism gear set 2 is disposed on the inner side of the reduction mechanism housing 401 , two piston cylinders 402 are symmetrically fixedly connected to one side of the reduction mechanism housing 401 , and the movable end of the piston assembly 5 is slidably connected to the inner side of the piston cylinder 402 .

[0034] By integrating various structures into the MGU housing 4, the system structure layout is simplified, the weight is reduced, the volume is reduced, the assembly is convenient, and the assembly time is reduced. Due to the modular design, key components such as the piston cylinder and motion conversion mechanism can be disassembled and assembled independently, which is convenient for daily maintenance and fault replacement, reducing maintenance costs and downtime.

[0035] Further optimizing the scheme, the planetary mechanism gear set 2 includes a double gear set mechanism and a planetary gear set mechanism;

[0036] The double gear set mechanism includes a motor gear 206 connected to the motor 1 shaft, the motor gear 206 is meshed with two symmetrically arranged second gears 205 on its circumferential side, each second gear 205 is meshed with a third gear 204 on its circumferential side, and the output end of the third gear 204 is connected to the planetary gear set mechanism shaft;

[0037] The planetary gear assembly mechanism includes an inner ring gear 202 fixedly connected to the inner side of the reduction mechanism housing 401, and the inner side of the inner ring gear 202 is meshed with the first planetary gear 211, the second planetary gear 212, and the third planetary gear 213, the first planetary gear 211, the second planetary gear 212, and the third planetary gear 213 are transmission connected to the third gear 204, the first planetary gear 211, the second planetary gear 212, and the third planetary gear 213 rotate on the same planetary carrier 201, and the planetary carrier 201 is transmission connected to the piston assembly 5.

[0038] The baffle 203 is fixedly connected to the planet carrier 201 to form a whole.

[0039] Through the multi-stage reduction design of the double gear set mechanism (motor gear 206, second gear 205, third gear 204), the torque output can be effectively increased while reducing the motor speed, ensuring that the power is smoothly and efficiently transmitted to the planetary gear set mechanism, thereby improving the working efficiency of the system. The arrangement of the planetary gear set mechanism (inner ring 202, first planetary gear 211, second planetary gear 212, third planetary gear 213) enables multiple planetary gears to share the load together, achieve uniform distribution of the load, and enhance the stability and carrying capacity of the system. The use of a planetary gear structure can achieve a larger transmission ratio in a smaller space, which is conducive to the miniaturization and lightweight design of the equipment, and is particularly suitable for application scenarios with limited space. The modular design of the gear assembly facilitates individual replacement or maintenance without the need to disassemble the entire transmission system on a large scale, reducing maintenance costs and time.

[0040] According to a further optimization scheme, the piston assembly 5 includes a ball screw 502, which is clearance-matched with the planetary carrier 201, a screw nut 503 is slidably connected to the outer side of the ball screw 502, a power end of the screw nut 503 is fixedly connected to the piston 501, and a ball 505 is provided between the screw nut 503 and the ball screw 502.

[0041] By introducing the ball screw 502 as a core component, the rotational motion of the planet carrier 201 is efficiently and smoothly converted into the linear motion of the screw nut 503, thereby driving the piston 501. The ball screw 502 significantly improves the energy conversion efficiency of the entire system with its low friction and high efficiency. The ball screw 502 is connected to the planet carrier 201 through an interference fit, ensuring a reliable transmission connection even under high load conditions, and enhancing the load bearing capacity of the entire system.

[0042] According to a further optimized solution, an upper cover plate 405 is fixedly connected to one end of the reduction mechanism housing 401 away from the piston cylinder 402 .

[0043] The upper cover plate 405 fixed to one end of the reduction mechanism housing 401 away from the piston cylinder 402 can effectively increase the sealing of the top of the housing and the overall rigidity of the structure, prevent the intrusion of external pollutants, and at the same time improve the stability of the system when subjected to force, reduce vibration and deformation, and protect internal components.

[0044] According to a further optimized solution, a support plate 403 is provided on one side of the output end of the motor 1 , and the support plate 403 is fixedly connected to the inner side of the reduction mechanism housing 401 .

[0045] A support plate 403 is provided at the output end of the motor 1 and fixedly connected to the inner side of the reduction mechanism housing 401. Such a design directly provides a stable installation foundation for the motor 1, reduces the vibration transmission generated when the motor 1 is running, protects the motor 1 from unnecessary stress, and prolongs the life of the motor 1. It also helps to accurately align the motor 1 with the reduction mechanism to ensure the efficient operation of the transmission system.

[0046] A further optimized solution is that a circuit board 302 is provided between the upper cover plate 405 and the support plate 403 , an induction magnetic ring 301 is coaxially fixedly connected to the output end of the motor 1 , an induction magnetic ring sensor is installed on the circuit board 302 , and the induction magnetic ring sensor cooperates with the induction magnetic ring 301 to detect the rotation angle of the motor 1 .

[0047] By placing an integrated circuit board 302 between the upper cover plate 405 and the support plate 403 and installing an inductive magnetic ring sensor thereon for use in conjunction with the inductive magnetic ring 301, the rotation angle change of the motor 1 can be detected in real time and accurately. This non-contact monitoring method reduces wear, improves measurement accuracy and long-term stability, and is essential for applications that require precise control of the operating status of the motor 1. The use of the inductive magnetic ring 301 in conjunction with the sensor simplifies the complexity of monitoring the performance of the motor 1, and facilitates rapid diagnosis of abnormal operation of the motor 1, such as speed deviation, jamming, and other problems, thereby reducing troubleshooting time and improving maintenance efficiency.

[0048] In a further optimized solution, the three-phase pins 304 of the motor 1 are electrically connected to the circuit board 302 .

[0049] The three-phase pins 304 of the motor 1 are directly electrically connected to the circuit board 302, which simplifies the electrical circuit layout, reduces the wiring complexity and potential risk of poor contact, and facilitates production and subsequent maintenance.

[0050] According to a further optimized solution, a connector 303 is provided at one end of the circuit board 302 close to the upper cover 405 , and the connector 303 passes through the upper cover 405 and is connected to the controller.

[0051] The connector 303 provided on the circuit board 302 can be connected to the controller through the upper cover 405. This design realizes a quick plug-in connection between the motor control module and the main control system, which not only supports plug-and-play, but also facilitates system upgrades or fault replacements, thereby enhancing the flexibility and maintainability of the system.

[0052] The integrated brake-by-wire mechanism of the present invention can be replaced individually as needed. Not only can the pedal displacement and deceleration curve be realized through the programmable controller, but also the hardware selection of different models can be adapted during the vehicle development stage, and personalized customization can be performed to meet the requirements of different customers in the after-sales market.

[0053] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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, and therefore should not be understood as a limitation on the present invention.

[0054] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An integrated electronic braking device, characterized in that: include: MGU housing (4); A motor (1), the fixed end of which is fixedly connected inside the MGU housing (4); One end of the planetary mechanism gear set (2) is connected to the motor (1) in driving connection, and the other end of the planetary mechanism gear set (2) is connected to two piston assemblies (5). The movable end of the piston assembly (5) cooperates with the brake friction pad to drive the brake friction pad to tighten or loosen the brake disc.

2. The integrated electronic brake device according to claim 1, characterized in that: The MGU housing (4) comprises a reduction mechanism housing (401), the planetary mechanism gear set (2) is disposed on the inner side of the reduction mechanism housing (401), two piston cylinder bodies (402) are symmetrically fixedly connected to one side of the reduction mechanism housing (401), and the movable end of the piston assembly (5) is slidably connected to the inner side of the piston cylinder body (402).

3. The integrated electronic brake device according to claim 2, characterized in that: The planetary gear set (2) comprises a double gear set mechanism and a planetary gear set mechanism; The dual gear set mechanism comprises a motor gear (206) axially connected to the motor (1); two symmetrically arranged second gears (205) are meshed on the circumferential side of the motor gear (206); a third gear (204) is meshed on the circumferential side of each second gear (205); an output end of the third gear (204) is axially connected to the planetary gear set mechanism; The planetary gear assembly mechanism comprises an inner gear ring (202) fixedly connected to the inner side of the reduction mechanism housing (401); the inner side of the inner gear ring (202) is meshedly connected with a first planetary gear (211), a second planetary gear (212), and a third planetary gear (213); the first planetary gear (211), the second planetary gear (212), and the third planetary gear (213) are transmission-connected to the third gear (204); the first planetary gear (211), the second planetary gear (212), and the third planetary gear (213) rotate on the same planetary carrier (201); and the planetary carrier (201) is transmission-connected to the piston assembly (5).

4. The integrated electronic brake device according to claim 3, characterized in that: The piston assembly (5) comprises a ball screw (502), the ball screw (502) and the planet carrier (201) are clearance-matched, a screw nut (503) is slidably connected to the outer side of the ball screw (502), a power end of the screw nut (503) is fixedly connected to the piston (501), and a ball (505) is provided between the screw nut (503) and the ball screw (502).

5. The integrated electronic brake device according to claim 2, characterized in that: An upper cover plate (405) is fixedly connected to one end of the speed reduction mechanism housing (401) away from the piston cylinder (402).

6. The integrated electronic brake device according to claim 5, characterized in that: A support plate (403) is provided on one side of the output end of the motor (1), and the support plate (403) is fixedly connected to the inner side of the speed reduction mechanism housing (401).

7. The integrated electronic brake device according to claim 6, characterized in that: A circuit board (302) is provided between the upper cover plate (405) and the support plate (403); an induction magnetic ring (301) is coaxially fixedly connected to the output end of the motor (1); an induction magnetic ring sensor is mounted on the circuit board (302); the induction magnetic ring sensor cooperates with the induction magnetic ring (301) to detect the rotation angle of the motor (1).

8. The integrated electronic brake device according to claim 7, characterized in that: The three-phase pins (304) of the motor (1) are electrically connected to the circuit board (302).

9. The integrated electronic brake device according to claim 7, characterized in that: A connector (303) is provided at one end of the circuit board (302) close to the upper cover plate (405), and the connector (303) passes through the upper cover plate (405) to be connected to a controller.

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