Dual-redundancy inhaul cable type electronic parking device

Abstract

The utility model relates to the field of electronic parking, in particular to a dual-redundancy inhaul cable type electronic parking device which comprises an EPB switch, an EPB controller and two sets of parking executing mechanisms, each set of parking executing mechanism comprises a motor actuator, a parking inhaul cable and a brake, and the EPB switch, the EPB controller, the motor actuator, the parking inhaul cable and the brake are sequentially connected. The EPB controller independently controls the two motor actuators. By the adoption of the technical scheme, the probability that the parking braking function of the whole vehicle is completely lost is reduced, and meanwhile installation and arrangement are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of electronic parking brakes, specifically to a dual-redundant cable-type electronic parking brake device. Background Technology

[0002] Currently, most cable-operated electronic parking brake devices on the market are single-circuit designs. For example, an electronic parking brake system for large vehicles with announcement number CN204895436U uses a single-motor actuator connected to a single cable structure mounted on the chassis (the chassis includes crossbeams and longitudinal beams). In the event of a motor actuator failure or a mechanical failure of the parking cable, the brake cannot perform the parking brake operation, and the entire vehicle will lose its parking brake capability, which may lead to a safety accident. At the same time, due to the motor power requirements, the single-motor actuator design results in a large motor size, which is inconvenient for installation and layout, and the corresponding actuator is also large. Utility Model Content

[0003] The present invention aims to provide a dual-redundant cable-operated electronic parking brake device, which reduces parking brake accidents and solves the problem of difficult installation and layout of motors and actuators through redundancy design.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a dual-redundant cable-type electronic parking device, comprising an EPB switch, an EPB controller, and two sets of parking actuators. Each set of parking actuators includes a motor actuator, a parking cable, and a brake. The EPB switch, EPB controller, motor actuator, parking cable, and brake are connected in sequence, and the EPB controller independently controls the two motor actuators.

[0005] The technical principle of this solution is as follows: When the driver controls the EPB switch to be pulled up, the EPB controller receives the hard-wire signal from the EPB switch and connects the motor actuator through the wiring harness. The motor actuator tightens the parking cable, and the brake performs the braking operation, thus initiating the parking brake operation for the entire vehicle. When the driver controls the EPB switch to be released, the EPB controller receives the hard-wire signal from the EPB switch and connects the motor actuator through the wiring harness. The motor actuator releases the parking cable, and the brake performs the release braking operation, thus releasing the parking brake operation for the entire vehicle.

[0006] The technical advantages of this solution are as follows: Traditional cable-operated electronic parking brakes, with their single-motor design, cannot perform parking brake operations in the event of a motor actuator failure or a mechanical failure of the parking cable, resulting in the loss of parking brake capability for the entire vehicle and potentially causing a safety accident. This solution, however, employs a dual-motor redundant design, with the EPB controller independently controlling both motors. Even if one motor actuator fails, the other motor actuator can still execute the parking command from the EPB controller. In other words, if one circuit fails, the other can continue to operate normally, reducing the likelihood of complete loss of the vehicle's parking brake function. Furthermore, the dual-motor actuator design allows for a lighter, smaller, and more convenient design and layout of individual motor actuators.

[0007] Preferably, as an improvement, the motor actuator is mounted on the crossbeam of the vehicle frame.

[0008] The technical advantages of this solution are: greater ground clearance, waterproof and dustproof, and no impact on the vehicle's passability.

[0009] Preferably, as an improvement, a mounting component is fixed on the crossbeam of the frame, and the motor actuator is mounted on the crossbeam of the frame through the mounting component.

[0010] Preferably, as an improvement, the mounting component includes a mounting plate and two L-shaped fixing plates. One end of the fixing plate is welded to the frame crossbeam, and the other end of the fixing plate is welded to the mounting plate. The mounting plate and the frame crossbeam are located on different vertical planes, and the motor actuator is bolted to the mounting plate.

[0011] The technical advantages of this solution are as follows: Since the motor actuator is located below the crossbeam of the vehicle frame and is bolted to the mounting plate, the mounting plate and the crossbeam of the vehicle frame are located on different vertical planes, which facilitates the provision of visible space for the installation of the motor actuator; at the same time, when the parking cable is pulled, the parking cable will exert a reverse force on the mounting component through the motor actuator. Since the fixing plate is L-shaped, when the parking cable exerts a reaction force on the mounting plate through the motor actuator, the fixing plate acts as a buffer, thereby avoiding damage to the welding firmness between the fixing plate and the crossbeam of the vehicle frame by the reaction force.

[0012] Extended explanation: Enhanced structural stability: Two L-shaped fixing plates are welded at one end to the frame crossbeam and at the other end to the mounting plate. This L-shaped structure can provide support in two mutually perpendicular directions. Compared with a simple flat plate structure, it greatly enhances the overall structural stability and strength of the mounting components, allowing the motor actuator to be more reliably fixed to the frame crossbeam after installation, reducing the risk of loosening or displacement caused by vibration, bumps and other factors during vehicle operation.

[0013] Distributed stress: The L-shaped structure can distribute the forces generated by the motor actuator and various forces transmitted to the mounting part during vehicle movement in different directions through the fixing plate. For example, part of the force is transmitted to the frame crossbeam along the weld between the fixing plate and the frame crossbeam, while another part of the force is transmitted to the mounting plate through the connection between the fixing plate and the mounting plate. This avoids force concentration, thereby reducing the pressure on the local structure and improving the reliability and durability of the entire mounting structure.

[0014] Increased space utilization efficiency: The mounting plate and the frame crossbeam are located on different vertical planes, which allows for the rational arrangement of motor actuators and related components in a limited space. This avoids spatial conflicts with other components on the plane where the frame crossbeam is located, and provides more space and flexibility for the installation and layout of other components around the frame, which is conducive to the compact design of the whole vehicle.

[0015] Optimized force transmission path: The design of different vertical planes makes the force transmission path between the motor actuator and the frame crossbeam more diverse and reasonable. When the motor actuator is working, the force can be transmitted to the frame crossbeam at a certain angle through the mounting plate and fixing plate. This non-linear force transmission path can buffer and disperse the force to a certain extent, reduce the impact on the frame crossbeam and the mounting components themselves, and improve the fatigue resistance of the entire system.

[0016] Improved vibration resistance: Because the mounting plate and the frame crossbeam are not on the same vertical plane, a flexible connection structure is formed between them. During vehicle operation, this structure can better absorb and buffer vibration energy from different directions, reducing the transmission of vibration from the frame crossbeam to the motor actuator, and the feedback of vibration from the motor actuator to the frame crossbeam. This improves the working stability and service life of the motor actuator, while also helping to reduce the overall vibration and noise levels of the vehicle.

[0017] Facilitates maintenance and repair: The mounting plate and the frame crossbeam are not on the same plane, which creates a gap and space between the motor actuator and the frame crossbeam. During vehicle maintenance and repair, staff can more easily access the motor actuator to perform inspection, repair, replacement and other operations, improving the convenience and efficiency of maintenance work and reducing maintenance costs.

[0018] Preferably, as an improvement, the parking cable is provided with a protective sleeve. The end of the protective sleeve near the motor actuator is located at the locking component. The locking component includes a locking tube connected to the protective sleeve and two nuts threaded to the outside of the locking tube. An L-shaped locking plate is fixed on the frame crossbeam. The locking plate includes a horizontal plate and a side plate. The horizontal plate is welded to the frame crossbeam. The side plate is provided with a U-shaped groove. The locking tube passes through the U-shaped groove and the two nuts lock the side plate at the U-shaped groove.

[0019] Preferably, as an improvement, a limit ring is installed on the longitudinal beam of the frame, a locking plate is located between the motor actuator and the limit ring, and a protective sleeve passes through the limit ring.

[0020] Preferably, as an improvement, a limiting plate is fixed on the side of the horizontal plate near the limiting ring.

[0021] The technical effect of this solution is that the limiting plate can effectively prevent the protective sleeve from bending excessively at the limiting ring, thereby ensuring the normal operation of the parking cable.

[0022] Preferably, as an improvement, the motor actuator includes a housing, a motor, a worm gear, a worm shaft, and a lead screw. The housing is bolted to a mounting plate, the motor is fixedly connected to the housing, the worm shaft is coaxial with and fixedly connected to the output shaft of the motor, the worm gear is rotatably disposed inside the housing, the worm gear meshes with the worm gear, a threaded sleeve is keyed to the middle of the worm gear, the lead screw is threadedly connected to the threaded sleeve, a limit block is provided on the side wall of the lead screw, a limit groove is provided inside the housing for the axial sliding of the limit block, and the parking cable is fixedly connected to the end of the lead screw. Attached Figure Description

[0023] Figure 1 This is a top view of an embodiment of the present utility model;

[0024] Figure 2 This is a three-dimensional schematic diagram of the vehicle frame after it has been flipped according to an embodiment of this utility model;

[0025] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0026] Figure 4 This is a schematic diagram of the installation component in an embodiment of the present invention. Detailed Implementation

[0027] The following detailed description illustrates the specific implementation method:

[0028] The reference numerals in the accompanying drawings include: EPB switch 1, EPB controller 2, motor actuator 3, mounting plate 4, parking cable 5, fixing plate 6, brake 7, limit ring 8, protective sleeve 9, locking tube 10, nut 11, horizontal plate 12, side plate 13, limit plate 14, housing 15, motor 16.

[0029] Example 1

[0030] Example 1 is basically as shown in the appendix. Figure 1-4 As shown: Figure 1 , 2The illustrated dual-redundant cable-type electronic parking brake includes an EPB switch 1, an EPB controller 2, and two sets of parking actuators. Each set of parking actuators includes a motor actuator 3, a parking cable 5, and a brake 7. The EPB switch 1, EPB controller 2, motor actuator 3, parking cable 5, and brake 7 are connected in sequence. The EPB controller 2 independently controls the two motor actuators 3.

[0031] When the driver controls EPB switch 1 to pull up, EPB controller 2 receives the hard-wire signal from EPB switch 1 and connects motor actuator 3 through the wiring harness. Motor actuator 3 tightens parking cable 5, and brake 7 performs braking operation, and the vehicle begins parking braking. When the driver controls EPB switch 1 to release, EPB controller 2 receives the hard-wire signal from EPB switch 1 and connects motor actuator 3 through the wiring harness. Motor actuator 3 releases parking cable 5, and brake 7 performs brake release operation, and the vehicle parking brake is released.

[0032] like Figure 3 , 4 As shown, a mounting component is fixed on the crossbeam of the vehicle frame. The motor actuator 3 is mounted on the crossbeam of the vehicle frame via the mounting component. The motor actuator 3 can be a patented product with announcement number CN202481063U. The mounting component includes a mounting plate 4 and two L-shaped fixing plates 6. One end of the fixing plate 6 is welded to the crossbeam of the vehicle frame, and the other end of the fixing plate 6 is welded to the mounting plate 4. The mounting plate 4 and the crossbeam of the vehicle frame are located on different vertical planes. The motor actuator 3 is bolted to the mounting plate 4.

[0033] like Figure 3 As shown, a limit ring 8 is bolted and installed on the longitudinal beam of the vehicle frame near the brake 7. A protective sleeve 9 is provided outside the parking cable 5. The protective sleeve 9 passes through the limit ring 8. The end of the protective sleeve 9 near the motor actuator 3 is located at the locking member. The locking member is located between the motor actuator 3 and the limit ring 8. The locking member includes a locking tube 10 connected to the protective sleeve 9 and two nuts 11 threaded to the outside of the locking tube 10.

[0034] An L-shaped locking plate is fixed on the crossbeam of the frame. The locking plate includes a horizontal plate 12 and a side plate 13. The horizontal plate 12 is welded to the crossbeam of the frame. The side plate 13 is provided with a U-shaped groove. The locking tube 10 passes through the U-shaped groove and two nuts 11 lock the side plate 13 at the U-shaped groove. A limit plate 14 is welded to the side of the horizontal plate 12 near the limit ring 8.

[0035] Example 2

[0036] Example 2 describes the motor actuator 3, as follows: Figure 4The motor actuator 3 shown includes a housing 15, a motor 16, a worm gear, a screw, and a lead screw. The housing 15 is bolted to the mounting plate 4. The motor 16 is fixedly connected to the housing 15. The worm gear is coaxial with and fixedly connected to the output shaft of the motor 16. The worm gear is rotatably disposed inside the housing 15. The worm gear meshes with the worm gear. A threaded sleeve is keyed to the middle of the worm gear. The lead screw is threadedly connected to the threaded sleeve. A limit block is provided on the side wall of the lead screw. A limit groove is provided inside the housing 15 for the axial sliding of the limit block. The parking cable 5 is fixedly connected to the end of the lead screw.

[0037] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A dual redundant cable electronic parking device, characterized by: The application relates to an EPB (electronic parking brake) system, which comprises an EPB switch, an EPB controller and two sets of parking brake actuators, each set of parking brake actuators comprising a motor actuator, a parking brake cable and a brake, wherein the EPB switch, the EPB controller, the motor actuators, the parking brake cables and the brakes are sequentially connected, and the EPB controller independently controls the two motor actuators.

2. A dual redundant cable electronic parking device according to claim 1, characterized in that: The motor actuator is mounted on a vehicle frame cross beam.

3. A dual redundant cable electronic park device according to claim 2, wherein: The motor actuator is mounted on the vehicle frame cross beam through a mounting piece.

4. A dual redundant cable electronic park device according to claim 3, wherein: The mounting piece comprises a mounting plate and two L-shaped fixing plates, one end of the fixing plate is welded to the vehicle frame cross beam, the other end of the fixing plate is welded to the mounting plate, the mounting plate and the vehicle frame cross beam are located in different vertical planes, and the motor actuator is bolted to the mounting plate.

5. A dual redundant cable electronic parking device according to any one of claims 1 or 4, characterized in that: The parking brake cable is externally provided with a protective sleeve, one end of the protective sleeve close to the motor actuator is arranged on a locking piece, the locking piece comprises a locking tube connected with the protective sleeve and two nuts externally screwed to the locking tube, an L-shaped locking plate is fixed on the vehicle frame cross beam, the locking plate comprises a horizontal plate and a side plate, the horizontal plate is welded to the vehicle frame cross beam, a U-shaped groove is arranged on the side plate, the locking tube passes through the U-shaped groove, and the two nuts lock the side plate at the U-shaped groove.

6. A dual redundant cable electronic park device according to claim 5, wherein: A limiting ring is mounted on the vehicle frame longitudinal beam, the locking plate is located between the motor actuator and the limiting ring, and the protective sleeve passes through the limiting ring.

7. A dual redundant cable electronic park device according to claim 6, wherein: A limiting plate is fixed on the side of the horizontal plate close to the limiting ring.

8. A dual redundant cable electronic park pawl as in any one of claims 1, 4 or 7, wherein: The motor actuator comprises a shell, a motor, a turbine, a worm and a screw rod, the shell is bolted to the mounting plate, the motor is fixedly connected to the shell, the worm is coaxially and fixedly connected to the output shaft of the motor, the turbine is rotationally arranged in the shell, the worm is engaged with the turbine, a threaded sleeve is key-connected to the middle part of the turbine, the screw rod is threadedly connected to the threaded sleeve, a limiting block is arranged on the side wall of the screw rod, a limiting groove for the axial sliding of the limiting block is arranged in the shell, and the parking brake cable is fixedly connected to the end of the screw rod.

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