Electronic brake mechanism

Abstract

The utility model belongs to the technical field of vehicle brake actuators, and particularly relates to an electronic brake mechanism. The electronic brake mechanism comprises a caliper body, and the caliper body is provided with a clamping opening for containing a brake disc. A piston cavity is formed in the side, located on the bayonet, of the caliper body, and a brake piston is contained in the piston cavity in a sliding mode. A power cabin and an electric control cabin are arranged on the caliper body and located on the same side of the piston cavity; a motor and a reduction gear set are arranged in the power cabin, and power of the motor is transmitted to the brake piston through the reduction gear set to drive the brake piston to move; a magnetic element is arranged on at least one rotating part on a power transmission path from the motor to the brake piston; a brake control circuit board and a magnetic sensing element which are mutually independent in structure are arranged in the electric control cabin. Due to the structural independence of the brake control circuit board and the magnetic sensing element, the brake control circuit board and the magnetic sensing element can be flexibly arranged according to the optimal detection requirement and spatial constraint, assembly error interference caused by integrated design is avoided, and it is ensured that the displacement of the brake piston is accurate and controllable.

Description

Technical Field

[0001] This utility model belongs to the technical field of vehicle brake actuators, specifically relating to an electronic braking mechanism. Background Technology

[0002] In the field of vehicle braking system technology, electromechanical braking technology is gradually replacing traditional hydraulic braking, becoming a development trend. Existing electronic braking mechanisms generally adopt an integrated sensor and brake control unit design, directly integrating magnetic detection elements onto the brake control circuit board, and indirectly calculating the brake piston displacement by detecting the rotation phase of the motor.

[0003] However, during the implementation of this invention, some hidden technical bottlenecks were discovered in the practical application of this integrated architecture. The integrated layout results in a fixed relative position between the magnetic sensing element and the rotating components, making it difficult to adjust the installation position and angle according to the optimal detection distance. Accumulated axial deviations and radial misalignments during assembly can easily cause magnetic field signal attenuation, leading to increased phase detection errors. Especially under high-temperature vibration conditions, signal distortion is more pronounced, affecting the closed-loop control accuracy of the braking force. Furthermore, the rotation of the detected object transmits vibration to the sensing element and then to the entire integrated circuit board through magnetic force, creating resonance within a specific speed range, accelerating the lifespan degradation of the integrated circuit board, and affecting system reliability. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides an electronic braking mechanism, which aims to provide an electronic braking mechanism that combines high-precision detection, resistance to environmental interference, easy maintenance and strong adaptability.

[0005] The electronic braking mechanism provided by this utility model includes a clamp body with a jaw to accommodate a brake disc; a piston chamber is located on one side of the jaw, and a brake piston is slidably accommodated in the piston chamber; a power compartment and an electronic control compartment are provided on the clamp body and on the same side as the piston chamber; the power compartment contains a motor and a reduction gear set, and the power of the motor is transmitted to the brake piston through the reduction gear set to drive the brake piston to move; at least one rotating component on the power transmission path from the motor to the brake piston is provided with a magnetic element; the electronic control compartment contains a brake control circuit board and a magnetic sensing element that are structurally independent of each other; the magnetic sensing element detects the phase of the magnetic element, and the brake control circuit board is electrically connected to the motor and the magnetic sensing element; the brake control circuit board controls the rotation of the motor in a closed loop according to the phase signal detected by the magnetic sensing element.

[0006] As a further optimization of the electronic braking mechanism, a partition is installed between the power compartment and the electronic control compartment to separate the two compartments into independent sealed spaces.

[0007] As a further optimization of the electronic braking mechanism, the magnetic element is embedded at the end of the rotating shaft of the motor, and the magnetic sensing element is mounted on the isolation plate and axially aligned with the magnetic element.

[0008] As a further optimization of the electronic braking mechanism, a magnetic element is embedded in any gear in the reduction gear set, and a magnetic sensing element is positioned directly opposite the magnetic element along the gear's rotation axis.

[0009] As a further optimization of the electronic braking mechanism, the braking control circuit board and the magnetic sensing element are connected by a flexible circuit, which has a redundant length section that allows the magnetic sensing element to be adjusted in position.

[0010] As a further optimization of the electronic braking mechanism, a set of mounting posts is provided inside the electronic control compartment and on the surface of the isolation plate, and the magnetic sensing element is detachably mounted on the mounting posts.

[0011] As a further optimization of the electronic braking mechanism, four mounting posts are provided, and each mounting post is equipped with an adjustable shim set at its top. The adjustable shim set consists of several replaceable shims of different thicknesses. By selecting shims of different thicknesses and combining them, the angle and position of the magnetic sensing element can be adjusted.

[0012] As a further optimization of the electronic braking mechanism, the braking control circuit board is provided with a through clearance hole, through which the mounting post passes.

[0013] As a further optimization of the electronic braking mechanism, the surface of the isolation plate is provided with multiple threaded holes, and the brake control circuit board is provided with corresponding mounting through holes; the fastening screws pass through the mounting through holes and are screwed into the threaded holes to fix the brake control circuit board on the isolation plate.

[0014] Beneficial effects

[0015] The electronic braking mechanism provided by this invention features a separate layout for the magnetic element and the magnetic sensing element, significantly improving braking accuracy and response speed. The structural independence of the braking control circuit board and the magnetic sensing element allows for flexible arrangement based on optimal detection requirements and spatial constraints, avoiding assembly errors caused by integrated designs. The magnetic sensing element can accurately capture phase changes of rotating components and, combined with a closed-loop algorithm, adjust the motor output in real time, ensuring precise controllability of the brake piston displacement.

[0016] Furthermore, the electronic braking mechanism system provided by this utility model offers high reliability and maintainability. An independent sealed space isolates lubricating grease contamination; flexible wiring and adjustable mounting posts enable multi-degree-of-freedom fine-tuning and compensate for machining tolerances, ensuring axial alignment accuracy; the clearance hole design optimizes space utilization; and the split structure facilitates independent component replacement, reducing maintenance costs. This synergistically enhances detection sensitivity and anti-interference capabilities, while simultaneously achieving miniaturization, modularization, and long-term stable operation of the braking system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the electronic braking mechanism.

[0018] Figure 2 This is an exploded schematic diagram of an electronic braking mechanism.

[0019] Figure 3 for Figure 2 A magnified view of a portion of the image.

[0020] In the diagram, 1 is the clamp body; 2 is the reduction gear set; 3 is the magnetic element; 4 is the brake control circuit board; 5 is the magnetic induction element; 11 is the bayonet; 12 is the piston chamber; 13 is the power compartment; 14 is the electrical control compartment; 15 is the isolation plate; 41 is the clearance hole; and 151 is the mounting column. Detailed Implementation

[0021] The present invention is further illustrated by the following embodiments, which are intended to more clearly illustrate the technical solution of the present invention, and should not be construed as a limitation.

[0022] like Figures 1 to 3The illustrated electronic braking mechanism includes a clamp body 1 with a jaw 11 in the center for accommodating and clamping a vehicle brake disc (not shown). On one side of the clamp body 1, for example, near the vehicle wheel hub, a piston chamber 12 is provided. An axially sliding brake piston is installed within the piston chamber 12 to press against the brake disc during braking. On the same side as the piston chamber 12, for example, along the axial extension direction of the clamp body, a power compartment 13 and an electronic control compartment 14 are respectively provided. The power compartment 13 houses a motor and a reduction gear set 2. The motor's output shaft is linked to the brake piston via the reduction gear set 2, converting rotational motion into linear motion of the brake piston, thereby applying braking force. At least one rotating component along the power transmission path from the motor to the brake piston is provided with a magnetic element 3, for example, at the end of the motor output shaft or the end of a transmission shaft in the reduction gear set, such as a ring magnet or a magnetic encoder, to characterize the phase information of the rotating component. The electronic control compartment 14 houses a structurally independent brake control circuit board 4 and a magnetic sensing element 5. The brake control circuit board 4 controls the start, stop, speed, and direction of the motor; the magnetic sensing element 5, such as a Hall sensor, obtains real-time angle information of the rotating component by detecting changes in the magnetic field of the magnetic element 3. The brake control circuit board 4 and the magnetic sensing element 5 are electrically connected to form a closed-loop control system.

[0023] During braking, the brake control circuit board 4 receives braking commands from the vehicle control unit (such as the ECU) and drives the motor to rotate. The motor's power is transmitted to the brake piston via the reduction gear set 2, pushing it to press against the brake disc. Simultaneously, the magnetic sensing element 5 detects the rotation phase of the magnetic element 3 in real time and feeds the signal back to the brake control circuit board 4. Based on the feedback signal, the brake control circuit board 4 calculates the actual rotation angle of the monitored rotating components and adjusts the motor output using a PID control algorithm to ensure accurate control of the brake piston displacement, achieving closed-loop control.

[0024] The magnetic sensing element 5 and the brake control circuit board 4 are structurally independent. The magnetic sensing element 5 can be placed individually at the optimal detection position close to the magnetic element 3, typically precisely aligned with the rotation axis of the magnetic element. The brake control circuit board 4, on the other hand, is flexibly installed in the fitting area of ​​the electronic control compartment 14 according to the vehicle's spatial layout requirements, avoiding interference with surrounding components. During assembly, the installation position and angle of the magnetic sensing element 5 can be finely adjusted independently of the brake control circuit board 4 to ensure that its gap, angle, and misalignment with the magnetic element 3 are optimal, improving detection accuracy and avoiding signal distortion due to assembly errors. Therefore, compared to a strongly coupled integrated solution, it offers greater flexibility and installation precision, which is beneficial for enhancing the reliability and response speed of brake control.

[0025] Furthermore, an isolation plate 15 is provided between the power compartment 13 and the electronic control compartment 14 to separate the two compartments into independent sealed spaces, so that the gear lubricating grease in the power compartment 13 will not seep into the electronic control compartment 14, and the electronic components in the electronic control compartment 14 will not be affected by the mechanical vibration of the power compartment 13, thereby reducing the failure rate of the brake control circuit board 4.

[0026] The magnetic element 3 can be embedded at the end of the rotating shaft of the motor. The magnetic sensing element 5 is mounted on the isolation plate 15 and is axially aligned with the magnetic element 3 to detect the rotation angle of the rotating shaft of the motor.

[0027] The magnetic element 3 can also be embedded in any gear in the reduction gear set 2, with the magnetic sensing element 5 facing the magnetic element 3 along the gear's rotation axis. By appropriately selecting the gear, the arrangement of the magnetic sensing element 5 can be facilitated, and a rotational speed that is easy to detect can be matched.

[0028] Preferably, the brake control circuit board 4 and the magnetic sensing element 5 are connected by a flexible line with a redundant length section, such as a reserved 15-30mm redundant length section, which facilitates bending and arrangement within the electronic control compartment 14 and allows the magnetic sensing element 5 to be adjusted in position.

[0029] Furthermore, a set of mounting posts 151 are provided inside the electronic control compartment 14 and on the surface of the isolation plate 15, and the magnetic sensing element 5 is detachably mounted on the mounting posts 151. During maintenance, the magnetic sensing element 5 can be removed and installed separately without affecting the brake control circuit board 4, making it convenient to replace the magnetic sensing element 5 at any time and independently.

[0030] Preferably, there are four mounting posts 151, each with an adjustable shim set at its top. The adjustable shim set consists of several replaceable shims of different thicknesses. By selecting and combining shims of different thicknesses, the angle and position of the magnetic sensing element 5 can be adjusted. The shim set includes 316L stainless steel shims of 0.1mm, 0.2mm, and 0.5mm thicknesses. During adjustment, the operator uses non-magnetic tweezers to stack the selected thickness shims in a "thick-thin-thick" stepped arrangement (e.g., a total thickness of 1.0mm is composed of 0.5+0.2+0.3mm), and then screws them onto the top of the mounting post 151. Through the differentiated thickness combination of the four sets of shims, the magnetic sensing element 5 can achieve a height adjustment of approximately ±0.8mm in the axial direction (Z-axis) and angular deflection compensation of ±1.5° around the X / Y axes.

[0031] Furthermore, the brake control circuit board 4 is provided with a through clearance hole 41, through which the mounting post 151 passes, making the spatial arrangement of the brake control circuit board 4 and the mounting post 151 more compact and flexible.

[0032] Furthermore, the surface of the isolation plate 15 is provided with multiple threaded holes, and the brake control circuit board 4 is provided with corresponding mounting through holes; the fastening screws pass through the mounting through holes and are screwed into the threaded holes to fix the brake control circuit board 4 on the isolation plate 15, thereby improving the stability of the installation.

[0033] The above embodiments are exemplary and are intended to illustrate the technical concept and features of this utility model, so that those skilled in the art can understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An electronic braking mechanism, characterized in that: The device includes a clamp body (1) having a bayonet (11) to accommodate a brake disc; a piston chamber (12) located on one side of the bayonet (11) of the clamp body (1) slidably accommodating a brake piston; a power compartment (13) and an electronic control compartment (14) are provided on the clamp body (1) and on the same side as the piston chamber (12); the power compartment (13) contains a motor and a reduction gear set (2), the power of the motor is transmitted to the brake piston via the reduction gear set (2) to drive the brake piston to move; at least one rotating component on the power transmission path from the motor to the brake piston is provided with a magnetic element (3); the electronic control compartment (14) contains a brake control circuit board (4) and a magnetic sensing element (5) with independent structures; the magnetic sensing element (5) detects the phase of the magnetic element (3), and the brake control circuit board (4) is electrically connected to the motor and the magnetic sensing element (5); the brake control circuit board (4) controls the rotation of the motor in a closed loop according to the phase signal detected by the magnetic sensing element (5).

2. The electronic braking mechanism according to claim 1, characterized in that: An isolation panel (15) is provided between the power compartment (13) and the electrical control compartment (14) to separate the two compartments into independent sealed spaces.

3. The electronic braking mechanism according to claim 2, characterized in that: The magnetic element (3) is embedded at the end of the rotating shaft of the motor, and the magnetic sensing element (5) is mounted on the isolation plate (15) and is axially aligned with the magnetic element (3).

4. The electronic braking mechanism according to claim 2, characterized in that: The magnetic element (3) is embedded in any gear in the reduction gear set (2), and the magnetic sensing element (5) is directly opposite the magnetic element (3) along the gear rotation axis.

5. The electronic braking mechanism according to claim 4, characterized in that: The braking control circuit board (4) is connected to the magnetic sensing element (5) by a flexible line, which has a redundant length segment to allow the magnetic sensing element (5) to be adjusted in position.

6. The electronic braking mechanism according to any one of claims 2 to 5, characterized in that: A set of mounting posts (151) is provided inside the electrical control compartment (14) and on the surface of the isolation plate (15), and the magnetic sensing element (5) is detachably mounted on the mounting posts (151).

7. The electronic braking mechanism according to claim 6, characterized in that: The mounting posts (151) are set to four, and each mounting post (151) is provided with an adjustable shim set at its top. The adjustable shim set consists of several replaceable shims of different thicknesses. By selecting shims of different thicknesses for combination installation, the angle and position of the magnetic sensing element (5) can be adjusted.

8. The electronic braking mechanism according to claim 6, characterized in that: The brake control circuit board (4) is provided with a through clearance hole (41), and the mounting post (151) passes through the clearance hole (41).

9. The electronic braking mechanism according to claim 6, characterized in that: The isolation plate (15) has multiple threaded holes on its surface, and the brake control circuit board (4) has corresponding mounting through holes; the fastening screw passes through the mounting through holes and screws into the threaded holes to fix the brake control circuit board (4) on the isolation plate (15).

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