Central parking braking device applied to unmanned charging vehicle

Abstract

The utility model discloses a central parking brake device applied to an unmanned charging vehicle, which is characterized in that wheel brake assemblies are fixed on the left side and the right side of a rear axle assembly, a speed reduction axle package is fixed on the front surface of the rear axle assembly, and a driving motor is fixed on the rear surface of the speed reduction axle package; a central braking parking device is fixed to the right side of the speed reduction axle package, and a central parking motor is fixed to the left side of the central braking parking device. According to the central electronic parking braking device, a set of parking structure is connected in series on the basis of a current mainstream wheel side braking parking structure, the set of parking structure is connected with an axle input shaft, most of original parts can still be used continuously, and large parking braking force can be achieved economically.

Description

Technical Field

[0001] The utility model relates to the technical field of parking brakes, in particular to a central parking brake device applied to an unmanned charging vehicle. Background Art

[0002] In recent years, the unmanned driving and intelligent driving technologies of electric vehicles have developed rapidly, and the level of unmanned driving has become higher and higher, which has put forward higher requirements for the safety performance of vehicles. In particular, the steering mechanism and braking mechanism are particularly important.

[0003] At present, the braking mechanism of most unmanned vehicles is wheel-side braking, which is achieved by the electronic hydraulic brake pushing the brake wheel cylinder (drum brake) or brake piston (disc brake) through the brake pipeline to rub the brake drum or brake disc to achieve deceleration or parking. However, wheel-side braking may cause insufficient parking torque or failure for heavy-load and unmanned vehicles due to unattended and excessive load, so the application of central braking in unmanned charging vehicles is particularly important. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a central parking brake device applied to an unmanned charging vehicle, which solves the problems raised by the above-mentioned background technology.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a central parking brake device used in an unmanned charging vehicle, including a rear axle assembly, wheel-side brake assemblies are fixed on both sides of the rear axle assembly, a reduction bridge package is fixed on the left side of the rear axle assembly, a drive motor is fixed on the rear surface of the reduction bridge package, a central brake parking device is fixed on the rear surface of the reduction bridge package, and a central parking motor is fixed on the rear surface of the central brake parking device. After the central brake parking device is connected to the input shaft of the reduction bridge package, it is connected to the output shaft of the drive motor, so that the central brake parking device can brake the drive motor.

[0006] Preferably, the brake used inside the wheel brake assembly is a drum brake.

[0007] Preferably, the central brake parking device is a disc type electronic brake.

[0008] Preferably, the central parking motor is a brushed DC motor.

[0009] Preferably, the driving motor is a brushless DC motor.

[0010] The utility model provides a central parking brake device applied to an unmanned charging vehicle. Compared with the prior art, it has the following beneficial effects:

[0011] The central electronic parking brake device is a series connection of a parking structure based on the current mainstream wheel-side brake parking structure. This structure is connected to the axle input shaft, and most of the original parts can still be used, which can achieve a larger parking brake force in a relatively economical manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of a central parking brake device used in an unmanned charging vehicle according to the utility model;

[0013] Figure 2 This is a front view structural schematic diagram of a central parking brake device used in an unmanned charging vehicle according to the utility model;

[0014] Figure 3 This is a top view structural schematic diagram of a central parking brake device used in an unmanned charging vehicle according to the utility model;

[0015] Figure 4 It is a cross-sectional view of the connection structure between the drive motor and the central brake parking device.

[0016] In the figure: 1. rear axle assembly; 2. wheel side brake assembly; 3. reduction bridge package; 301. reduction bridge package input shaft; 4. drive motor; 401. drive motor output shaft; 5. central brake parking device; 6. central parking motor. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-Figure 3The utility model provides a technical solution: a central parking brake device applied to an unmanned charging vehicle, wherein a wheel side brake assembly 2 is fixed on both sides of a rear axle assembly 1, a reduction bridge package 3 is fixed on the front surface of the rear axle assembly 1, a drive motor 4 is fixed on the rear surface of the reduction bridge package 3, a central brake parking device 5 is fixed on the right side of the reduction bridge package 3, and a central parking motor 6 is fixed on the left side of the central brake parking device 5. When the vehicle needs to park, a hydraulic signal is provided manually or by a computer, and the electronic hydraulic brake system pushes the wheel side brake through the brake pipeline to decelerate the vehicle until the vehicle stops. When the vehicle speed is zero, the vehicle VCU generates a parking request, and the central parking motor 6 receives the signal. The central brake parking device 5 is driven by the central parking motor 6 to push the friction plate to hold the brake disc to achieve parking. Since the central brake parking device 5 is connected to the reduction bridge package input shaft 301 and then connected to the drive motor output shaft 401, the braking torque is increased by more than ten times after passing through the reduction bridge package 3, so that the parking force meets the braking requirements.

[0019] Furthermore, the brake used inside the wheel-side brake assembly 2 is a drum brake, which utilizes a brake transmission mechanism to cause the brake shoe to press the brake friction plate against the inner side of the brake drum, thereby generating a braking force to slow down the wheel or stop the wheel in the shortest distance as needed, to ensure driving safety and to ensure that the car is parked securely and cannot slip automatically.

[0020] Furthermore, the central brake parking device 5 is a disc electronic brake, which has good stability when exposed to heat, has no self-amplification, and its braking effect is basically not affected by the friction coefficient. When subjected to thermal expansion, the radial expansion of the brake disc of the disc brake has no effect on its braking performance, and its axial expansion is also relatively small.

[0021] Furthermore, the central parking motor 6 is a brushed DC motor. The working principle of the brushed DC motor is to achieve current conversion through the contact between the brush and the rotor, so that the motor can run. In the parking system, the function of this motor is to realize the parking and unparking of the vehicle, and ensure the safety of the vehicle when parking.

[0022] Furthermore, the drive motor 4 is a brushless DC motor, which has the advantages of long life, low maintenance cost and good control performance. The motor realizes current conversion through the contact between the brush and the rotor, thereby driving the motor 4 to operate. During the parking process, the central parking motor 6 receives a parking request signal from the vehicle VCU (Vehicle Control Unit) and drives the central brake parking device 5 to achieve parking.

[0023] When the vehicle needs to park, the manual or computer provides a hydraulic signal, and the electronic hydraulic brake system pushes the wheel brakes through the brake pipes to slow down the vehicle until the vehicle stops. When the vehicle speed is zero, the vehicle VCU generates a parking request, the central parking motor 6 receives the signal, and the central brake parking device 5 pushes the friction plate to hold the brake disc under the force of the central parking motor 6 to achieve parking. Figure 4 As shown, the central brake parking device 5 is connected to the reduction bridge package input shaft 301 and then connected to the drive motor output shaft 401. After passing through the reduction bridge package 3, the braking torque is increased by more than ten times, so that the parking force meets the braking requirements.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A central parking brake device used in an unmanned charging vehicle, comprising a rear axle assembly (1), characterized in that: Wheel-side brake assemblies (2) are fixed on both left and right sides of the rear axle assembly (1); a reduction bridge package (3) is fixed on the front surface of the rear axle assembly (1); a drive motor (4) is fixed on the rear surface of the reduction bridge package (3); a central brake parking device (5) is fixed on the right side of the reduction bridge package (3); and a central parking motor (6) is fixed on the left side of the central brake parking device (5); the central brake parking device (5) is connected to the reduction bridge package input shaft (301) and then connected to the drive motor output shaft (401).

2. A central parking brake device used in an unmanned charging vehicle according to claim 1, characterized in that: The brake used inside the wheel brake assembly (2) is a drum brake.

3. A central parking brake device used in an unmanned charging vehicle according to claim 2, characterized in that: The central brake parking device (5) is a disc type electronic brake.

4. The central parking brake device used in an unmanned charging vehicle according to claim 3 is characterized in that: The central parking motor (6) is a brushed DC motor.

5. A central parking brake device used in an unmanned charging vehicle according to claim 4, characterized in that: The drive motor (4) is a brushless DC motor.

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