Dual-redundancy inhaul cable type electronic parking device

Abstract

The invention 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] The invention relates to the field of electronic parking, and in particular to a dual-redundant cable-type electronic parking device. Background Art

[0002] At present, the cable-type electronic parking devices on the market are mainly single-circuit designs. For example, an electronic parking system for large vehicles with announcement number CN204895436U adopts a single motor actuator installed on the frame (the frame includes the frame crossbeam and the frame longitudinal beam) to connect a single cable structure. 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 cause a safety accident. At the same time, the single motor actuator design has a large motor size due to the motor power requirements, which is inconvenient to install and arrange, and the corresponding actuator size is also large. Summary of the invention

[0003] The present invention is intended to provide a dual-redundant cable-type electronic parking device, so as to reduce parking brake accidents through redundant design and solve the problem of difficulty in installing and arranging a motor and an actuator.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a dual-redundant cable-type electronic parking device, including 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, the EPB controller, the motor actuator, the parking cable and the brake are connected in sequence, and the EPB controller independently controls the two motor actuators.

[0005] The technical principle of this solution is: when the driver controls the EPB switch to pull up, the EPB controller receives the hard-wire signal of the EPB switch and connects the motor actuator through the wiring harness, the motor actuator tightens the parking cable, the brake performs the braking operation, and the entire vehicle starts parking braking; when the driver controls the EPB switch to release, the EPB controller receives the hard-wire signal of the EPB switch and connects the motor actuator through the wiring harness, the motor actuator releases the parking cable, the brake performs the braking release operation, and the parking brake of the entire vehicle is released.

[0006] The technical effect of this solution is as follows: the traditional cable-type electronic parking device is designed with a single motor. 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 cause a safety accident. This solution adopts a dual-motor redundant design, and the EPB controller independently controls the dual motors. In the event of a failure in one of the motor actuators, the other motor actuator can execute the parking command of the EPB controller, that is, when one of the circuits fails, the other circuit can work normally, reducing the probability of complete loss of the parking brake function of the entire vehicle. At the same time, due to the use of a dual-motor actuator design, a single motor actuator can be designed to be lightweight, with a smaller volume and weight, which is convenient for design and layout.

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

[0008] The technical effect of this solution is: the vehicle has a large ground clearance, is waterproof and dustproof, and does not affect the vehicle's passability.

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

[0010] Preferably, as an improvement, the mounting member 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 in different vertical planes, and the motor actuator is bolted to the mounting plate.

[0011] The technical effect of this solution is: since the motor actuator is located below the frame crossbeam and the motor actuator is bolted to the mounting plate, the mounting plate and the frame crossbeam are located on different vertical planes to facilitate the reservation of visible space for the installation of the motor actuator; at the same time, when the parking cable is pulled, the parking cable will give a reverse force to the mounting part through the motor actuator, and since the fixing plate is L-shaped, when the parking cable gives a reaction force to the mounting plate through the motor actuator, the fixing plate acts as a buffer, thereby preventing the reaction force from damaging the welding firmness of the fixing plate and the frame crossbeam.

[0012] The expanded explanation is to enhance structural stability: two L-shaped fixing plates are welded to the frame crossbeam at one end and to the mounting plate at the other end. 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 parts, so that the motor actuator can 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 driving.

[0013] Dispersed force: The L-shaped structure can disperse the force generated by the motor actuator and various forces transmitted to the installation part during the vehicle's driving process in different directions through the fixing plate. For example, part of the force is transmitted to the frame crossbeam along the welding point between the fixing plate and the frame crossbeam, and the other part of the force is transmitted to the mounting plate through the connection between the fixing plate and the mounting plate, avoiding the concentration of force, thereby reducing the pressure on the local structure and improving the reliability and durability of the entire mounting structure.

[0014] Increase space utilization efficiency: The mounting plate and frame crossbeam are located on different vertical planes, which allows the motor actuator and related components to be reasonably arranged within a limited space, avoiding space conflicts with other components on the plane where the frame crossbeam is located, providing more space and flexibility for the installation and layout of other components around the frame, and facilitating the compact design of the entire vehicle.

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

[0016] Improved seismic performance: Since the mounting plate and the frame crossbeam are not on the same vertical plane, a certain flexible connection structure is formed between them. During the vehicle's driving, this structure can better absorb and buffer vibration energy from different directions, reduce the vibration transmitted from the frame crossbeam to the motor actuator, and reduce the vibration feedback of the motor actuator to the frame crossbeam, thereby improving the working stability and service life of the motor actuator, and also helping to reduce the overall vibration and noise level of the vehicle.

[0017] Easy maintenance and overhaul: The mounting plate and the frame crossbeam are not in the same plane, so there is a certain gap and space between the motor actuator and the frame crossbeam. When performing vehicle maintenance and overhaul, the staff can more easily approach the motor actuator for inspection, repair, replacement and other operations, which improves the convenience and efficiency of maintenance work and reduces maintenance costs.

[0018] Preferably, as an improvement, a protective sleeve is provided outside the parking cable, and a locking member is provided at one end of the protective sleeve close to the motor actuator, and the locking member includes a locking tube connected to the protective sleeve and two nuts threadedly connected to the outside of the locking tube; an L-shaped locking plate is fixed on the frame crossbeam, and the locking plate includes a cross plate and a side plate, the cross plate is welded to the frame crossbeam, and a U-shaped groove is provided on the side plate, the locking tube passes through the U-shaped groove and two nuts lock the side plate at the U-shaped groove.

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

[0020] Preferably, as an improvement, a limiting plate is fixed to one side of the transverse plate close to the limiting ring.

[0021] The technical effect of this solution is that the limiting plate limits the protective sleeve and can effectively prevent the protective sleeve from being excessively bent 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 turbine, a worm and a lead screw. The housing is bolted to the mounting plate, the motor is fixedly connected to the housing, the worm is coaxial with the output shaft of the motor and fixedly connected, the turbine is rotatably arranged in the housing, the worm is meshed with the turbine, a threaded sleeve is keyed in the middle of the turbine, the lead screw is threadedly connected to the threaded sleeve, the side wall of the lead screw is provided with a limit block, a limit groove is provided in the housing for axial sliding of the limit block, and the parking cable is fixedly connected to the end of the lead screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A top view of an embodiment of the present invention;

[0024] Figure 2 It is a three-dimensional schematic diagram of a vehicle frame after flipping over according to an embodiment of the present invention;

[0025] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0026] Figure 4 It is a schematic diagram of the structure of the mounting member according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The following is further described in detail through specific implementation methods:

[0028] The figure marks in the drawings of the specification include: EPB switch 1, EPB controller 2, motor actuator 3, mounting plate 4, parking cable 5, fixing plate 6, brake 7, limiting ring 8, protective sleeve 9, locking tube 10, nut 11, cross plate 12, side plate 13, limiting plate 14, housing 15, and motor 16.

[0029] Example 1

[0030] Embodiment 1 is basically as attached Figure 1-4 As shown: Figure 1 , 2A dual-redundant cable-type electronic parking device shown 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, the EPB controller 2, the motor actuator 3, the parking cable 5 and the brake 7 are connected in sequence, and the EPB controller 2 independently controls the two motor actuators 3.

[0031] When the driver controls the EPB switch 1 to be pulled up, the EPB controller 2 receives the hard-wire signal of the EPB switch 1 and connects the motor actuator 3 through the wiring harness. The motor actuator 3 tightens the parking cable 5, and the brake 7 performs the braking operation, and the whole vehicle starts to park. When the driver controls the EPB switch 1 to be released, the EPB controller 2 receives the hard-wire signal of the EPB switch 1 and connects the motor actuator 3 through the wiring harness. The motor actuator 3 releases the parking cable 5, and the brake 7 performs the braking release operation, and the parking brake of the whole vehicle is released.

[0032] like Figure 3 , 4 As shown, a mounting piece is fixed on the frame crossbeam, and the motor actuator 3 is mounted on the frame crossbeam through the mounting piece, wherein the motor actuator 3 can select the patent product with announcement number CN202481063U. The mounting piece includes a mounting plate 4 and two L-shaped fixing plates 6, one end of the fixing plate 6 is welded to the frame crossbeam, and the other end of the fixing plate 6 is welded to the mounting plate 4, the mounting plate 4 and the frame crossbeam are located in different vertical planes, and the motor actuator 3 is bolted to the mounting plate 4.

[0033] like Figure 3 As shown, a limit ring 8 is bolted and fixed to the frame longitudinal beam 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, and a locking piece is provided at one end of the protective sleeve 9 near the motor actuator 3. The locking piece is located between the motor actuator 3 and the limit ring 8, and the locking piece includes a locking tube 10 connected to the protective sleeve 9 and two nuts 11 threadedly connected to the outside of the locking tube 10.

[0034] An L-shaped locking plate is fixed on the frame crossbeam, and the locking plate includes a cross plate 12 and a side plate 13. The cross plate 12 is welded to the frame crossbeam, and a U-shaped groove is provided on the side plate 13. 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 limiting plate 14 is welded to the side of the cross plate 12 close to the limiting ring 8.

[0035] Example 2

[0036] Embodiment 2 describes the motor actuator 3, as shown in FIG. Figure 4The motor actuator 3 shown includes a housing 15, a motor 16, a turbine, a worm 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 is coaxial with the output shaft of the motor 16 and is fixedly connected, the turbine is rotatably arranged in the housing 15, the worm is meshed with the turbine, a threaded sleeve is keyed in the middle of the turbine, the lead screw is threadedly connected to the threaded sleeve, the side wall of the lead screw is arranged on a limit block, a limit groove is provided in the housing 15 for the axial sliding of the limit block, and the parking cable 5 is fixedly connected to the end of the lead screw.

[0037] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A dual-redundant cable-type electronic parking device, characterized in that: It includes 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, the EPB controller, the motor actuator, the parking cable and the brake are connected in sequence, and the EPB controller independently controls the two motor actuators.

2. The dual-redundant cable-type electronic parking device according to claim 1, characterized in that: The motor actuator is mounted on the frame crossbar.

3. The dual-redundant cable-type electronic parking device according to claim 2, characterized in that: A mounting piece is fixed on the frame crossbeam, and the motor actuator is mounted on the frame crossbeam through the mounting piece.

4. The dual-redundant cable-type electronic parking device according to claim 3, characterized in that: The mounting part 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 in different vertical planes, and the motor actuator is bolted to the mounting plate.

5. A dual-redundant cable-type electronic parking device according to any one of claims 1 or 4, characterized in that: A protective sleeve is provided outside the parking cable, and a locking piece is provided at one end of the protective sleeve close to the motor actuator. The locking piece includes a locking tube connected to the protective sleeve and two nuts threadedly connected to the outside of the locking tube; an L-shaped locking plate is fixed on the frame crossbeam, and the locking plate includes a cross plate and a side plate. The cross plate is welded to the frame crossbeam, and a U-shaped groove is provided on the side plate. The locking tube passes through the U-shaped groove and two nuts lock the side plate at the U-shaped groove.

6. A dual-redundant cable-type electronic parking device according to claim 5, characterized in that: A limit ring is installed on the frame longitudinal beam, a locking plate is located between the motor actuator and the limit ring, and a protective sleeve passes through the limit ring.

7. The dual-redundant cable-type electronic parking device according to claim 6, characterized in that: A limiting plate is fixed on one side of the transverse plate close to the limiting ring.

8. A dual-redundant cable-type electronic parking device according to any one of claims 1, 4 or 7, characterized in that: The motor actuator includes a housing, a motor, a turbine, a worm and a lead screw. The housing is bolted to the mounting plate, the motor is fixedly connected to the housing, the worm is coaxial with the output shaft of the motor and is fixedly connected, the turbine is rotatably arranged in the housing, the worm is meshed with the turbine, a threaded sleeve is keyed in the middle of the turbine, the lead screw is threadedly connected to the threaded sleeve, the side wall of the lead screw is provided with a limit block, a limit groove is provided in the housing for axial sliding of the limit block, and the parking cable is fixedly connected to the end of the lead screw.

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