Electronic mechanical brake with high control reliability

Abstract

The utility model discloses an electronic mechanical brake with high control reliability. The electronic mechanical brake comprises an MGU assembly and a caliper assembly. The MGU assembly is connected with the caliper assembly through a screw; the MGU assembly comprises a PCB (Printed Circuit Board), a Hall sensing assembly and a motor; the PCB is installed on the outer side of the MGU assembly, the Hall sensing assembly is installed on the inner side of the MGU assembly, the Hall sensing assembly is connected to the motor, and the Hall sensing assembly is used for driving the motor; the Hall sensing assembly comprises a Hall sensor and a special-shaped magnet, and the special-shaped magnet is in a non-circular shape; the Hall sensor is installed on the PCB, and the special-shaped magnet is arranged on the motor. By increasing the area of the magnet in the Hall sensing assembly, a stronger magnetic field can be generated to a certain extent, so that the Hall element generates a Hall voltage which is large enough, the gap influence caused by assembly between parts can be reduced, and the control reliability of a product is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of brake technology, and specifically relates to an electromechanical brake with high control reliability. Background Technology

[0002] Electro-mechanical brakes (EMB) are an advanced braking technology that converts the fluid transmission in traditional hydraulic or pneumatic braking systems into direct electromechanical transmission. In mainstream product designs, EMBs typically use permanent magnet synchronous motors (PMSMs) as their power source. For EMBs, motor control is the key to their performance.

[0003] In existing technologies, motors are typically controlled by pairing circular magnets with Hall sensors. While this approach performs well in many applications, it also has some drawbacks when considering the influence of surrounding components and size limitations. Due to the fixed geometry of the circular magnet, it may not be suitable for the design requirements of all application scenarios.

[0004] Therefore, the above situation urgently needs to be addressed. Utility Model Content

[0005] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide an electromechanical brake with high control reliability, which can generate a strong magnetic field and reduce the impact of gaps in the assembly of components, thereby enhancing the control reliability of the product.

[0006] Technical Solution: A highly reliable electromechanical brake includes an MGU assembly and a caliper assembly. The MGU assembly is connected to the caliper assembly via screws. The MGU assembly includes a PCB board, a Hall effect sensor assembly, and a motor. The PCB board is mounted on the outside of the MGU assembly, and the Hall effect sensor assembly is mounted on the inside of the MGU assembly. The Hall effect sensor assembly is connected to the motor and is used to drive the motor. The Hall effect sensor assembly includes a Hall sensor and a non-circular magnet. The Hall effect sensor is mounted on the PCB board, and the non-circular magnet is mounted on the motor. This application designs a non-circular magnet, which reduces the impact of assembly gaps between components and enhances the control reliability of the product.

[0007] The motor includes a motor shaft and a motor gear; the motor gear is sleeved on the motor shaft. The motor provides power to activate or release the braking mechanism.

[0008] The irregularly shaped magnet has two straight sides and two curved sides on its end face, exhibiting an axially symmetrical structure. Unlike circular magnets, this irregularly shaped magnet effectively increases the surface area, generating a stronger magnetic field to a certain extent, and has a wider range of applications.

[0009] The irregularly shaped magnets have different length and width dimensions on their end faces, with the largest diagonal dimension exceeding 15 mm. The end faces of the irregularly shaped magnetic field can be adaptively set according to actual needs.

[0010] The irregularly shaped magnet has a through hole in its center, and its center is concentric with the motor shaft. The irregularly shaped magnet is sleeved on the motor shaft. This application utilizes a magnetic field to transmit force, enabling the braking process to be completed without direct contact, reducing wear, and improving the system's lifespan and reliability.

[0011] The distance from the smallest dimension of the irregularly shaped magnet to the motor shaft is less than the root circle radius of the motor gear. This application makes more efficient use of limited space, making the entire brake more compact and facilitating miniaturization design.

[0012] The center of the Hall sensor is concentric with the motor shaft. This design, where the center of the Hall sensor is installed concentrically with the motor shaft, ensures accurate position detection and speed feedback, thereby achieving a high degree of control over the motor's operating state.

[0013] The irregularly shaped magnet is arranged parallel to the Hall sensor. This parallel arrangement of the irregularly shaped magnet and the Hall sensor is designed to optimize the accuracy and reliability of magnetic field detection, while ensuring that the interaction between the two meets specific application requirements.

[0014] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0015] This application increases the area of ​​the magnet in the Hall sensor component, which can generate a stronger magnetic field to a certain extent, thereby enabling the Hall element to generate a sufficiently large Hall voltage. It can also reduce the impact of gaps in the assembly of components and enhance the control reliability of the product. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an electromechanical brake assembly with high control reliability.

[0017] Figure 2 A schematic diagram of the internal Hall effect component structure of the MGU assembly, a high-reliability electromechanical brake.

[0018] Figure 3 A schematic diagram showing the arrangement of magnets on a motor shaft for a highly reliable electromechanical brake.

[0019] Figure 4 A schematic diagram of the magnet end face structure of an electromechanical brake with high control reliability;

[0020] Figure 5 A schematic diagram comparing the root circles of the magnet and the motor gear in an electromechanical brake with high control reliability;

[0021] Explanation of reference numerals in the attached diagram: 1-MGU assembly; 101-PCB board; 102-Hall sensor component; 1021-Hall sensor; 1022-Irregularly shaped magnet; 103-Motor; 1031-Motor shaft; 1032-Motor gear; 2-Screw; 3-Caliper assembly. Detailed Implementation

[0022] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. Example

[0023] This embodiment describes an electromechanical brake with high control reliability. Please refer to [link / reference]. Figure 1 As shown, it includes an MGU assembly 1 and a caliper assembly 3; the MGU assembly 1 is connected to the caliper assembly 3 by screws 2.

[0024] Please refer to Figure 2 As shown, the PCB board 101 is mounted on the outside of the MGU assembly 1, and a Hall sensor assembly 102 is mounted on the inside of the MGU assembly 1. The Hall sensor assembly 102 is connected to the motor 103 and is used to drive the motor 103. The Hall sensor assembly 102 includes a Hall sensor 1021 and an irregularly shaped magnet 1022, which is non-circular. The Hall sensor 1021 is mounted on the PCB board 101, and the irregularly shaped magnet 1022 is mounted on the motor 103. The center of the Hall sensor 1021 is concentric with the motor shaft 1031. The irregularly shaped magnet 1022 is arranged parallel to the Hall sensor 1021.

[0025] Please refer to Figure 3 As shown, the motor 103 includes a motor shaft 1031 and a motor gear 1032; the motor gear 1032 is sleeved on the motor shaft 1031. The irregularly shaped magnet 1022 has a through hole in its center, and the center of the irregularly shaped magnet 1022 is concentric with the motor shaft 1031. The irregularly shaped magnet 1022 is sleeved on the motor shaft 1031.

[0026] Please refer to Figure 4 As shown, the two sides of the end face of the irregularly shaped magnet 1022 are straight, while the other two sides are curved. The end face of the irregularly shaped magnet 1022 has an axisymmetric structure. The length and width of the end face of the irregularly shaped magnet 1022 are different, with the maximum diagonal dimension being greater than 15 mm.

[0027] Please refer to Figure 5 As shown, the distance from the smallest dimension of the irregular magnet 1022 to the center of the motor shaft 1031 is less than the root circle radius of the motor gear 1032.

[0028] The caliper assembly 3 is a key component of the vehicle's braking system, primarily used to clamp the brake disc to generate friction, thereby slowing or stopping the vehicle. The caliper assembly 3 includes: a caliper body, pistons, brake pads, seals, and guide rails or guide pins. The caliper body is the main frame of the entire assembly, housing and supporting other internal components. The caliper body is typically made of cast iron or aluminum. The pistons, located within the caliper body, are directly related to brake fluid pressure. Single-piston calipers are commonly used in small vehicles and on the rear wheels; while multi-piston calipers are common in high-performance vehicles or on the front wheels, providing stronger braking force. The brake pads are mounted on both sides of the caliper body; when the pistons are pushed, they press against the brake disc, slowing the vehicle through friction. The brake pads are made of wear-resistant materials, such as metal fibers or ceramics, depending on the application requirements. The seals include dust seals and piston seals to prevent dirt and moisture from entering the caliper interior, while ensuring no brake fluid leakage. The guide rails or guide pins allow the caliper to move freely relative to the wheel to apply braking force evenly. The slide rail allows the caliper to be finely adjusted as the brake disc rotates, ensuring that the brake pads on both sides make synchronous contact.

[0029] The installation method of the electromechanical brake with high control reliability includes:

[0030] Step S1: First, assemble MGU assembly 1;

[0031] Step S2: Then connect and install the PCB board 101, Hall sensor assembly 102, and motor 103 together in sequence;

[0032] Step S201: Install Hall sensor 1021 on PCB board 101;

[0033] Step S202: Install motor shaft 1031 on the output end of motor 103, and fit electric gear 1032 onto motor shaft 1031;

[0034] Step S203: Install irregularly shaped magnets 1022 on the motor shaft 1031;

[0035] Step S3: Finally, connect the MGU assembly 1 to the caliper assembly 3 using screw 2;

[0036] The Hall sensor 1021 is installed in parallel with the irregularly shaped magnet 1022; the size of the irregularly shaped magnet 1022 can be adjusted according to actual needs.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A highly reliable electromechanical brake, characterized in that, The system includes an MGU assembly (1) and a caliper assembly (3); the MGU assembly (1) is connected to the caliper assembly (3) by screws (2); the MGU assembly (1) includes a PCB board (101), a Hall sensor assembly (102), and a motor (103); the PCB board (101) is mounted on the outside of the MGU assembly (1), the Hall sensor assembly (102) is mounted on the inside of the MGU assembly (1), the Hall sensor assembly (102) is connected to the motor (103), and the Hall sensor assembly (102) is used to drive the motor (103); the Hall sensor assembly (102) includes a Hall sensor (1021) and a non-circular magnet (1022); the Hall sensor (1021) is mounted on the PCB board (101), and the non-circular magnet (1022) is mounted on the motor (103).

2. The electromechanical brake with high control reliability according to claim 1, characterized in that, The motor (103) includes a motor shaft (1031) and a motor gear (1032); the motor gear (1032) is sleeved on the motor shaft (1031).

3. The electromechanical brake with high control reliability according to claim 1, characterized in that, The two sides of the end face of the irregularly shaped magnet (1022) are straight, and the other two sides are curved. The end face of the irregularly shaped magnet (1022) has an axisymmetric structure.

4. The electromechanical brake with high control reliability according to claim 3, characterized in that, The irregularly shaped magnet (1022) has different length and width dimensions on its end face, with the maximum diagonal dimension being greater than 15 mm.

5. The electromechanical brake with high control reliability according to claim 3, characterized in that, The irregularly shaped magnet (1022) has a through hole in its center, and the center of the irregularly shaped magnet (1022) is concentric with the motor shaft (1031). The irregularly shaped magnet (1022) is sleeved on the motor shaft (1031).

6. The electromechanical brake with high control reliability according to claim 5, characterized in that, The distance from the smallest dimension of the irregular magnet (1022) to the center of the motor shaft (1031) is less than the root circle radius of the motor gear (1032).

7. A highly reliable electromechanical brake according to claim 1 or 2, characterized in that, The center of the Hall sensor (1021) is concentric with the motor shaft (1031).

8. The electromechanical brake with high control reliability according to claim 1, characterized in that, The irregularly shaped magnet (1022) is arranged in parallel with the Hall sensor (1021).

Images