Electronic parking system

Abstract

The application provides an electronic parking system, and discloses an electronic parking system, a connecting hole for connecting with a caliper body is arranged on a connecting part; an installation space for placing the caliper body is formed between the connecting part, an upper claw and a lower claw; the lower claw comprises installation ears, the installation ears comprise left installation ears and right installation ears, the lower claw further comprises a fixing part connecting the left installation ears and the right installation ears, the fixing part is provided with fixing holes, the fixing holes are arranged in parallel with the connecting holes, the installation ears comprise the left installation ears, the right installation ears, the left connecting ears and the right connecting ears, the heights of the left installation ears, the right installation ears, the left connecting ears and the right connecting ears are the same, the left installation ears and the right installation ears are located above the inside of the fixing part, and the distance between the left connecting ears and the right connecting ears is greater than the length of the fixing part. The parking system has good working fluency, does not jam, and can meet the requirements of a 24V electronic parking system.

Description

Technical Field

[0001] This invention relates to the field of electronic parking systems, and more particularly to an electronic parking system. Background Technology

[0002] The applicant previously filed a Chinese patent application, CN201920152939.8, entitled "An Electronic Parking System with Dual Actuators and Dual Pistons." This solution provides an electronic parking system equipped with a dual-actuator, dual-piston structure to meet the requirements of greater parking force. Existing parking brakes generally require mounting to the vehicle body via brackets, and traditionally, electronic caliper assemblies are equipped on both sides of the vehicle. However, to enable the electronic parking system to function as a central parking brake, the mounting method of the electronic parking caliper needs to be redesigned to accommodate the bracket and secure the electronic caliper. Furthermore, existing electronic parking systems are not compatible with 24V electronic parking systems. Summary of the Invention

[0003] This invention provides an electronic parking system to address existing technical problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An electronic parking brake system includes an EPB actuator and an electronic caliper assembly controlled by the EPB actuator. The electronic caliper assembly is fixed to the vehicle body by being fixed on a fixed bracket. The EPB actuator is a 24V motor actuator. The fixed bracket is used to fix the system to the electric drive axle in the middle of the vehicle. The fixed bracket includes an upper caliper and a lower caliper, which are connected by a connecting part. The connecting part has a connecting hole for connecting to the caliper body. An installation space for placing the caliper body is formed between the connecting part, the upper caliper, and the lower caliper. The lower caliper includes mounting ears, including a left mounting ear and a right mounting ear. The lower caliper also includes a fixing part connecting the ends of the left and right mounting ears. The fixing part has a fixing hole, which is parallel to the connecting hole. The mounting ears include a left mounting ear and a right mounting ear. The other ends of the left and right connecting ears are at the same height and located above the inner side of the fixing part. The distance between the ends of the left and right connecting ears is greater than the length of the fixing part.

[0006] Preferably, the lower caliper also includes a support portion connecting the mounting ear and the connecting portion. The inner side of the support portion is provided with a guide groove for the sliding of the brake block. The guide groove is arranged in a vertical direction. A guide groove is also provided at the position of the upper caliper directly above the lower caliper. The guide groove is part of the mounting space. The electronic caliper assembly includes a caliper body, which is embedded in the space enclosed by the upper caliper, the lower caliper, and the connecting portion. The edge of the upper brake block is inserted into the guide groove of the upper caliper, and the lower brake block is inserted into the guide groove of the lower caliper and can slide along the upper guide groove.

[0007] Preferably, the upper brake block and the lower brake block are connected on the caliper back side by two spring-loaded structures. The upper end of one spring-loaded structure is connected to the left end of the upper brake block and the other end is connected to the left end of the lower brake block. The upper end of the other spring-loaded structure is connected to the right end of the upper brake block and the other end is connected to the right end of the lower brake block. During the braking process, the gap between the upper brake block and the lower brake block gradually decreases, and the spring-loaded structure is compressed and accumulates elastic potential energy. After the braking is completed, the spring-loaded mechanism releases the elastic potential energy and the upper brake block and the lower brake block return to their original positions.

[0008] Preferably, the spring mechanism is formed by bending to form an upper spring bar and a lower spring bar. The upper spring bar and the lower spring bar are used to connect with the upper brake block and the lower brake block, respectively. The connection between the upper spring bar and the lower spring bar is a C-shaped limiting part formed by bending. The ends of the upper spring bar and the lower spring bar are bent to form an arc-shaped structure. The brake block includes a main body and guide ears extending from the left and right ends. The guide ears fit into the guide groove. The side of the guide ear clamp has a plug hole. The end of the arc-shaped structure of the spring bar is plugged into the plug hole.

[0009] Preferably, both the upper and lower jaws have guide plate structures installed in their guide slots to ensure stable movement of the upper brake block. The guide plate structure is an integral spring, which is bent to form three side panels that cover the three sides of the guide slot. A bent limiting piece is provided at the upper end of the side panel on the left or right side of the guide slot. One of the front and rear side panels has a limiting piece, and the other side panel has an inwardly bent buffer piece. The end of the guide plate is bent at the connection point with the side panel to form a C-shaped elastic portion. The brake block is confined within the space between the buffer piece and the side panel limiting piece.

[0010] Preferably, the lower side of the guide groove extends to the back side of the mounting ear, and the back side of the mounting ear forms a movement opening that facilitates the sliding of the brake block, with reinforcing ribs formed at the edges of the sliding opening.

[0011] Preferably, the support part is arranged horizontally in the longitudinal direction, the fixing part is arranged horizontally in the transverse direction, and the fixing part has fixing holes at both ends.

[0012] Preferably, the connecting part is a vertical columnar structure, and the installation space is located between the upper claw and the two supporting parts.

[0013] Preferably, the upper jaw has a C-shaped structure.

[0014] Preferably, the system also includes an ECU, which receives signals from the vehicle, including EPB switch signals, engine signals, seat belt signals, and brake signals. The ECU is connected to the EPB actuator, and the ECU controls the EPB actuator to work based on the received vehicle signals. The EPB actuator controls the electronic caliper assembly to park or release.

[0015] This solution has the following beneficial effects:

[0016] The bracket structure designed in this solution forms a semi-open space on its inner side for matching with the electronic caliper body, thus occupying a relatively small overall space. Secondly, to match the vehicle structure and function as a central parking brake, the lower caliper structure in this solution serves two purposes: it acts as a lower limit stop, and its inverted triangular design not only solves the problem of mounting holes not being able to be installed on the electric drive axle, but also meets strength design requirements. Furthermore, the inner structural design guides the brake pads without causing interference.

[0017] Meanwhile, the return structure in this solution has stable return, and the caliper assembly is designed with an active return mechanism. The return spring of the caliper friction block is designed at the lug. The center of gravity of the friction block sliding on the bracket is also on the lug, which can more effectively return after the brake is released, prevent uneven force and drag during the return process, reduce the sliding resistance between the friction plate and the bracket, thereby reducing the drag torque of the braking system and reducing the overall vehicle fuel consumption. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the device.

[0019] Figure 2 This is a schematic diagram of the overall structure of the device.

[0020] Figure 3 This is a structural diagram of the fixed support.

[0021] Figure 4 This is a structural diagram of the fixed support.

[0022] Figure 5 This is a structural diagram of the fixed support.

[0023] Figure 6 yes Figure 5 This is a magnified view of a portion of the image.

[0024] Figure 7 This is a schematic diagram of the brake block and the return structure.

[0025] Among them, 1-upper jaw, 2-lower jaw, 3-connecting part, 4-connecting hole, 5-left connecting ear, 6-right connecting ear, 7-fixing part, 8-fixing hole, 9-supporting part, 10-guide groove, 11-guide plate structure, 12-side panel, 13-limiting plate, 14-C-shaped elastic part, 15-movement port, 16-reinforcing rib, 17-clamp body, 18-upper brake block, 19-lower brake block, 20-rebound structure, 21-upper rebound bar, 22-lower rebound bar, 23-C-shaped limiting part, 24-guide ear, 25-insertion hole, 26-actuator. Detailed Implementation

[0026] Example 1

[0027] An electronic parking brake system includes an EPB actuator 26 and an electronic caliper assembly controlled by the EPB actuator 26. The electronic caliper assembly is fixed to the vehicle body by being fixed on a mounting bracket 27. The EPB actuator 26 is a 24V motor actuator. The mounting bracket 27 is used to fix the system to the electric drive axle in the middle of the vehicle. Specifically, the mounting bracket 27 includes an upper jaw 1 and a lower jaw 2, which are connected by a connecting part 3. The upper jaw 1, lower jaw 2, and connecting part 3 form a limiting space for mounting the caliper body 17. The connecting part 3 has a connecting hole 4 for connecting to the caliper body 17. The connecting hole 4 is an elongated hole. An installation space for placing the caliper body 17 is formed between the connecting part 3, the upper jaw 1, and the lower jaw 2. The lower jaw 2 includes mounting ears, which are divided into a left mounting ear on the left and a right mounting ear on the right. The left and right mounting ears are connected by a fixing part 7, which has a fixing hole 8 for fixing to the vehicle body. In this design, the fixing hole 8 is parallel to the connecting hole 4 and is vertical. The other ends of the left connecting ear 5 and the right connecting ear 6 are at the same height and located on the inner upper side of the fixing part 7. The distance between the ends of the left connecting ear 5 and the right connecting ear 6 is greater than the length of the fixing part 7. This structural shape allows the left connecting ear 5, the right connecting ear 6, and the fixing part 7 to form a limiting space, so the connecting ears of this structure can be adapted to be installed on the electric drive axle. At the same time, the designed inverted triangular structure has high strength and stable and reliable support.

[0028] Furthermore, to accommodate the installation of the clamp body 17 and support the brake block, the lower jaw 2 also includes a support portion 9 connecting the mounting ear and the connecting portion 3. The inner side of the support portion 9 is provided with a guide groove 10 for the brake block to slide, and the guide groove 10 is arranged vertically; the guide groove 10 is part of the installation space. The lower side of the guide groove 10 extends to the back side of the mounting ear, where a sliding opening 15 is formed to facilitate the sliding of the brake block, and a reinforcing rib 16 is formed at the edge of the sliding opening. A guide plate structure 11 can be installed inside the guide groove 10 to guide the brake block, reducing the design and matching difficulty of the clamp body 17. Moreover, the design of the back side of the connecting ear avoids interference between the guide groove 10 and the connecting ear, while forming the reinforcing rib 16 structure, ensuring the strength of the bracket and minimizing its weight.

[0029] The caliper backs of the upper brake block 18 and the lower brake block 19 are connected by two spring-loaded structures 20. One spring-loaded structure 20 has its upper end connected to the left end of the upper brake block 18 and its other end connected to the left end of the lower brake block 19; the other spring-loaded structure 20 has its upper end connected to the right end of the upper brake block 18 and its other end connected to the right end of the lower brake block 19. During braking, the gap between the upper brake block 18 and the lower brake block 19 gradually decreases, and the spring-loaded structure 20... The brake block 18 and lower brake block 19 are compressed and accumulate elastic potential energy. After braking, the rebound structure 20 releases the elastic potential energy and returns to their original positions. The rebound structure 20 forms an upper rebound bar 21 and a lower rebound bar 22 by bending. The upper rebound bar 21 and the lower rebound bar 22 are used to connect with the upper brake block 18 and the lower brake block 19, respectively. The connection between the upper rebound bar 21 and the lower rebound bar 22 is a C-shaped limiting part 23 formed by bending. The ends of the upper rebound bar 21 and the lower rebound bar 22 are bent. The brake block has an arc-shaped structure; the brake block includes a main body and guide ears 24 extending from the left and right ends. The guide ears 24 fit into the guide groove 10. The side of the guide ear 24 on the back side of the caliper is provided with a insertion hole 25. The end of the arc-shaped structure of the rebound bar is inserted into the insertion hole 25. The guide groove 10 of the upper and lower caliper portions is equipped with a guide plate structure to ensure the stable movement of the upper brake block 18. The guide plate structure 11 is an integral spring. The integral spring is bent to form three side panels 12, which respectively cover the three sides of the guide groove 10. The upper end of the side panel 12 on the left or right side of the guide groove 10 is provided with a bent limiting piece 13. One of the front and rear side panels 12 is provided with a limiting piece 13, and the other side panel 12 is provided with an inwardly bent buffer piece. The end of the guide piece is bent at the connection with the side panel 12 to form a C-shaped elastic part 14. The guide ears 24 of the brake block are restricted within the space limited by the buffer piece and the side panel 12.

[0030] In this design, the support part 9 is arranged horizontally and longitudinally, while the fixing part 7 is arranged horizontally and laterally. Fixing holes 8 are provided at both ends of the fixing part 7. The fixing holes 8 undergo secondary processing to ensure their strength and surface flatness. The connecting part 3 is a vertical columnar structure. The installation space is located between the upper jaw 1 and the two support parts 9. The upper jaw 1 has a C-shaped structure. The bracket structure designed in this embodiment forms a semi-open space on its inner side for matching with the caliper body 17 of the electronic caliper, thus occupying a relatively small overall space. Furthermore, to match the vehicle structure and provide a central parking function, the lower jaw 2 structure in this design serves as a lower limit stop. Additionally, the inverted triangular design not only solves the problem of the mounting hole not being able to be installed on the electric drive axle, but also meets the strength design requirements. Simultaneously, the inner structural design guides the brake blocks without interference.

[0031] Example 2

[0032] The support structure also includes a clamp body 17, with connecting ears provided at both the left and right ends of the clamp body 17. The connecting ears are installed on the upper part of the connecting part 3, and the upper end of the clamp body 17 extends out from the mouth formed by the upper jaw 1.

[0033] Example 3

[0034] The difference between this embodiment and Embodiment 1 is that the fixed bracket 27 is formed by sand casting.

[0035] Example 4

[0036] The difference between this embodiment and embodiment 1 is that it also includes an ECU. The ECU is used to receive vehicle signals, including EPB switch signals, engine signals, seat belt signals, and brake signals. The ECU is connected to the EPB actuator 26. The ECU controls the EPB actuator 26 to work through the received vehicle signals. The EPB actuator 26 controls the electronic caliper assembly to park or release.

[0037] 1. The present invention consists of a parking switch, an ECU (electronic control unit), an upper outlet EPB actuator 26, a caliper assembly, and a brake disc. The upper outlet EPB actuator 26 is fixed on the caliper. The piston inside the piston caliper is driven by the EPB actuator 26 to move, causing the brake pads to move and clamping or releasing the brake disc, thereby realizing the parking and parking release functions.

[0038] 2. In this invention, the ECU receives and judges signals from the EPB switch, engine, transmission, seat belt, brake, and door, and then controls the direction and magnitude of the current flowing to the motor in the EPB actuator 26.

[0039] 3. The present invention controls the forward and reverse rotation of the motor by controlling the direction of the current flowing to the motor inside the EPB actuator 26.

[0040] When the motor rotates forward, the EPB actuator drives the piston in the piston caliper to move outward, reducing the gap between the two brake pads in the piston caliper, thereby clamping the brake disc and realizing the parking function; when the motor rotates in reverse, the EPB actuator 26 drives the piston in the piston caliper to move inward, increasing the gap between the two brake pads in the piston caliper 2, thereby releasing the brake disc and realizing the parking release function.

Claims

1. An electronic parking system, characterized in that: The system includes an EPB actuator and an electronic caliper assembly controlled by the EPB actuator. The electronic caliper assembly is fixed to the vehicle body by being fixed on a mounting bracket. The EPB actuator is a 24V motor actuator. The mounting bracket is used to fix the system to the electric drive axle in the middle of the vehicle. The mounting bracket includes an upper jaw and a lower jaw, which are connected by a connecting part. The connecting part has a connecting hole for connecting to the caliper body. An installation space for placing the caliper body is formed between the connecting part, the upper jaw, and the lower jaw. The lower jaw includes mounting ears, including a left mounting ear and a right mounting ear. The lower jaw also includes a fixing part that connects the ends of the left and right mounting ears. The fixing part has a fixing hole that is parallel to the connecting hole. The mounting ears include a left mounting ear and a right mounting ear. The other ends of the left and right connecting ears are at the same height and located inside and above the fixing part. The distance between the ends of the left and right connecting ears is greater than the length of the fixing part.

2. The electronic parking system according to claim 1, characterized in that: The lower caliper also includes a support portion connecting the mounting ear and the connecting portion. The inner side of the support portion is provided with a guide groove for the sliding of the brake block. The guide groove is arranged in a vertical direction. A guide groove is also provided at the position of the upper caliper directly above the lower caliper. The guide groove is part of the mounting space. The electronic caliper assembly includes a caliper body, which is embedded in the space enclosed by the upper caliper, the lower caliper, and the connecting portion. The edge of the upper brake block is inserted into the guide groove of the upper caliper, and the lower brake block is inserted into the guide groove of the lower caliper and can slide along the upper guide groove.

3. The electronic parking system according to claim 1, characterized in that: The upper and lower brake blocks are connected on the caliper back side by two spring-loaded structures. The upper end of one spring-loaded structure is connected to the left end of the upper brake block and the other end is connected to the left end of the lower brake block. The upper end of the other spring-loaded structure is connected to the right end of the upper brake block and the other end is connected to the right end of the lower brake block. During the braking process, the gap between the upper and lower brake blocks gradually decreases, and the spring-loaded structures are compressed and accumulate elastic potential energy. After braking, the spring-loaded mechanism releases the elastic potential energy and the upper and lower brake blocks return to their original positions.

4. The electronic parking system according to claim 3, characterized in that: The spring mechanism is formed by bending to form an upper spring bar and a lower spring bar. The upper spring bar and the lower spring bar are used to connect with the upper brake block and the lower brake block, respectively. The connection between the upper spring bar and the lower spring bar is a C-shaped limiting part formed by bending. The ends of the upper spring bar and the lower spring bar are bent to form an arc-shaped structure. The brake block includes a main body and guide ears extending from the left and right ends. The guide ears fit into the guide groove. The side of the guide ear clamp has a plug hole. The end of the arc-shaped structure of the spring bar is plugged into the plug hole.

5. An electronic parking system according to claim 2, characterized in that: Both the upper and lower jaws have guide plate structures installed in their guide slots to ensure the stable movement of the upper brake block. The guide plate structure is an integral spring, which is bent to form three side panels that cover the three sides of the guide slot. The upper end of the side panel on the left or right side of the guide slot is provided with a bent limiting piece. One of the front and rear side panels is provided with a limiting piece, and the other side panel is provided with an inwardly bent buffer piece. The end of the guide plate is bent to form a C-shaped elastic part at the connection with the side panel. The brake block is confined within the space between the buffer piece and the side panel limiting piece.

6. An electronic parking system according to claim 2, characterized in that: The lower side of the guide groove extends to the back side of the mounting ear, and the back side of the mounting ear forms a movement opening that facilitates the sliding of the brake block. The edge of the sliding opening forms a reinforcing rib.

7. An electronic parking system according to claim 6, characterized in that: The support part is arranged horizontally in the longitudinal direction, and the fixing part is arranged horizontally in the transverse direction. The fixing part has fixing holes at both ends.

8. An electronic parking system according to claim 7, characterized in that: The connecting part is a vertical columnar structure, and the installation space is located between the upper claw and the two support parts.

9. An electronic parking system according to claim 8, characterized in that: The upper jaw has a C-shaped structure.

10. An electronic parking system according to claim 1, characterized in that: It also includes an ECU, which receives signals from the vehicle, including EPB switch signals, engine signals, seat belt signals, and brake signals. The ECU is connected to the EPB actuator, and the ECU controls the EPB actuator to work through the received vehicle signals. The EPB actuator controls the electronic caliper assembly to park or release.

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