Driving anti-skid system for special carrying platform capable of being dragged

Abstract

The invention provides a driving anti-skid system for a special trailer carrying platform, which comprises a plurality of brake assemblies, each brake assembly corresponds to one wheel set of the carrying platform, and each brake assembly is connected with an air source pipeline and a brake pipeline; the brake assembly comprises an EBS valve, a stop valve, a brake and a rotating speed sensor, and the rotating speed sensor is used for collecting rotating speed data of the corresponding wheel set and connected with the stop valve; the brake is used for braking the corresponding wheel set and is connected with the EBS; the stop valve is connected with the EBS valve and then connected with the air source pipeline and the brake pipeline. According to the invention, when the speed sensor detects that the speed of a certain wheel is zero, the braking system automatically reduces the group of braking pressure; in the self-walking state, when the speed sensor detects that the rotating speed of a certain wheel exceeds the set rotating speed, the braking system control valve acts to brake the set of wheels to limit the overspeed of the wheels, the vehicle is prevented from losing hydraulic power, and the motor is protected from being damaged.

Description

Technical Field

[0001] The invention relates to the field of active anti-skid technology, and in particular to a drive anti-skid system for a towable special-purpose special carrying platform. Background Art

[0002] The multi-axle trailer consists of a front vehicle, a cargo platform and a rear vehicle. The front and rear vehicles are three-axle self-propelled vehicles with self-propelled and towing functions. The vehicle consists of three axles and six sets of hydraulic independent suspension. The left and right suspensions are linkage steering mechanisms. The front and rear three axis lines are independent steering mechanisms. The steering centering cylinder and the oil cylinder displacement sensor are used to realize the electronic hydraulic linkage steering. When the vehicle is driving on a bumpy, pothole-prone area or muddy road, it will slip. On the one hand, the motor overspeed will cause damage to the motor. On the other hand, the slip will cause the high-pressure oil to flow away from the slipping motor, making the other motors unable to rotate and lose power.

[0003] The existing technology adds an anti-skid device to the drive system to passively implement the anti-skid technology. The traditional drive anti-skid technology has the disadvantages of torque control and is insufficient in identifying road conditions. The accuracy of fault identification by the existing technology is not high. Summary of the invention

[0004] In view of the problems existing in the prior art, the present application proposes a drive anti-skid system for a towable special carrier platform, wherein the drive anti-skid system comprises a plurality of brake assemblies, each brake assembly corresponds to a wheel set of the carrier platform, and each brake assembly is connected to an air source pipeline and a brake pipeline;

[0005] The brake assembly includes an EBS valve, a stop valve, a brake and a speed sensor. The speed sensor is used to collect the speed data of the corresponding wheel group and is connected to the stop valve; the brake is used to achieve braking of the corresponding wheel group and is connected to the EBS; the stop valve is connected to the EBS valve and then connected to the air source pipeline and the brake pipeline.

[0006] Furthermore, the EBS valve is quickly connected to a control line in the tractor cab via a quick-change connector.

[0007] Furthermore, the brake is connected to an air booster pump via an oil circuit, and the air booster pump is connected to an air reservoir via an air circuit and the EBS valve;

[0008] When the tractor controls the brake port pressure of the EBS valve, it controls the compressed air entering the EBS valve from the air reservoir to reach the air booster pump. The air booster pump then outputs the brake hydraulic oil, which enters the brake chamber of the brake to achieve braking of the corresponding wheel axle.

[0009] Furthermore, each wheel axle of the carrying platform is connected to a self-driving motor, and the carrying platform can be self-propelled without being connected to a tractor; the speed sensor is integrated on the self-propelled motor, and a brake is also installed on the wheel axle of the self-propelled motor, which, in conjunction with the EBS valve of the braking system, can realize the automatic anti-overspeed function of the motor.

[0010] Furthermore, the brake adopts a hydraulic drum brake, and the brake is arranged at the shaft end of the self-driving motor.

[0011] Furthermore, when the vehicle is traveling by itself, a braking command is sent to the vehicle controller through the remote control, and the vehicle controller controls all EBS valves to implement corresponding braking; when the EBS valve receives the braking command, the EBS valve closes the normally open input solenoid valve, and at the same time opens the normally closed input solenoid valve of the EBS valve, and implements corresponding braking on the corresponding wheels, thereby realizing the driving braking function of the whole vehicle.

[0012] Furthermore, an EBS controller is included, and the EBS controller is used to receive the speed signal of the speed sensor and then output a braking signal to the EBS valve.

[0013] Furthermore, during braking, the locking state of the wheel is quickly determined based on the speed signal transmitted by each wheel speed sensor, and the normally open input solenoid valve of the EBS valve on the wheel that begins to lock is closed to keep the braking force unchanged. If the wheel continues to lock, the normally closed output solenoid valve of the EBS valve is opened to reduce the braking pressure of the corresponding wheel.

[0014] Furthermore, when driving, the electronic stability program analyzes the vehicle speed signal and wheel angle signal to determine that the driving speed of the driving wheel exceeds the theoretical speed, and then sends a correction instruction to the EBS valve, first closing the normally open input solenoid valve of the EBS valve corresponding to the driving overspeed, and at the same time opening the normally closed input solenoid valve of the EBS valve to brake the overspeeding driving wheel.

[0015] The anti-skid driving system for a towable special carrying platform provided by the present invention has the following beneficial effects compared with the prior art:

[0016] The present invention can achieve the following: when the speed sensor detects that the speed of a certain wheel is zero, the braking system automatically reduces the braking pressure of this group; in the self-propelled state, when the speed sensor detects that the speed of a certain wheel exceeds the set speed, the braking system control valve is actuated to brake this group of wheels to limit wheel overspeed, prevent the vehicle from losing hydraulic power and protect the motor from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a connection schematic diagram of the driving anti-skid system of the present invention;

[0018] Figure 2This is a control logic diagram of the drive anti-skid system of the present invention. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Reference Figure 1 and Figure 2 , the present application proposes a towable special carrier platform driving anti-skid system, comprising a plurality of brake assemblies, each brake assembly corresponds to a wheel set of the carrier platform, and each brake assembly is connected to an air source pipeline and a brake pipeline;

[0021] The brake assembly includes an EBS valve, a stop valve, a brake and a speed sensor. The speed sensor is used to collect the speed data of the corresponding wheel set and is connected to the stop valve; the brake is used to brake the corresponding wheel set and is connected to the EBS; the stop valve is connected to the EBS valve and then connected to the air source pipeline and the brake pipeline. The EBS valve is quickly connected to the control line of the tractor cab through a quick-change connector.

[0022] Anti-skid control collects signals through the speed sensors of each wheel set. The controller compares the speed of each wheel set and has speed limit anti-skid and differential anti-skid. Speed ​​limit anti-skid protects the motor from overspeed damage and also prevents the motor from losing driving force when it stalls. Differential anti-skid monitors the speed of each wheel set according to the steering mode and steering radius to prevent the vehicle from slipping on potholes and reducing driving force.

[0023] The anti-skid is achieved by providing braking force to the wheels that are slipping or differential. The speed signal is input to the EBS controller on the platform (mainly used to improve the braking performance of trucks), which calculates and controls the solenoid valve of the EBS valve to brake. The braking force increases, the load of the slipping wheel group increases, and the speed decreases, which prevents the hydraulic oil from losing pressure and flowing away through the wheel group. The brake adopts hydraulic drum brake, which is integrated at the shaft end of the hydraulic drive motor, and the air pressure is converted into hydraulic brake by the air booster pump.

[0024] When the entire towable special transport platform is in operation, control the motor speed and make it exceed the set speed, and observe the working status of the motor and ABS system controller.

[0025] If the speed of one of the motors exceeds the set speed, the ABS system controller sends a command to activate the brake air chamber of the corresponding motor tire to perform braking action and reduce the speed; that is, the entire drive anti-skid system meets the design requirements.

[0026] Alternatively, during the entire process, manual operation can be performed to select a wheel set with better road conditions, start the drive motor, drive the vehicle, and shut down the drive motor of the wheel set that is slipping and disengage it, so that the tire can follow the movement.

[0027] The motor is integrated with a speed sensor, and a hub-type service brake is installed at the shaft end. Together with the brake system EBS valve, the motor can automatically prevent overspeed. In the self-driving state, when the speed sensor detects that the speed of a wheel exceeds 100 rpm, the brake system control valve will be activated to brake the group of wheels to limit overspeed, prevent the vehicle from losing hydraulic power, and protect the motor from damage.

[0028] After the trailer and tractor are connected, the control pressure from the tractor cab is connected to the control port on the EBS valve to control the brake port pressure of the EBS valve, thereby controlling the compressed air entering the EBS valve from the air reservoir to reach the air booster pump. The air booster pump then outputs brake hydraulic oil, which enters the brake chamber to achieve vehicle driving braking.

[0029] This application has:

[0030] Automatic anti-lock function: The main function of this system is to quickly determine the locking state of the wheel according to the speed signal from each wheel speed sensor during braking, and close the normally open input solenoid valve of the EBS valve on the wheel that begins to lock to keep the braking force unchanged. If the wheel continues to lock, the normally closed output solenoid valve of the EBS valve will be opened to reduce the braking pressure of the corresponding wheel to prevent the wheel from locking due to excessive braking force, so that the braking force of each wheel is at the optimal point.

[0031] Anti-hydraulic motor overspeed function: The main function of this system is that when driving, the electronic stability program analyzes the vehicle speed signal and wheel angle signal to determine that the driving speed of the driving wheel exceeds the theoretical speed, and then sends a correction instruction to the EBS valve. First, the normally open input solenoid valve of the EBS valve corresponding to the driving overspeed is closed, and at the same time, the normally closed input solenoid valve of the EBS valve is opened to brake the overspeeding driving wheel, so as to maintain the dynamic balance of the vehicle driving speed and keep the best stability of the vehicle under various conditions.

[0032] Remote control braking function: Since the vehicle adopts an electronic braking system, the vehicle can realize the braking function through the remote control; when the trailer is used alone, the braking command is sent to the vehicle controller through the proportional brake handle on the remote control, and the vehicle controller controls all EBS valves to realize corresponding braking; when the EBS valve receives the braking command, the EBS valve closes the normally open input solenoid valve and opens the normally closed input solenoid valve of the EBS valve at the same time, and implements corresponding braking on the corresponding wheels to realize the driving braking function of the whole vehicle.

[0033] In summary, the above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereto. All equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification are within the scope covered by the patent of the present invention.

Claims

1. A towable special transport platform driving anti-skid system, characterized by: The drive anti-skid system includes a plurality of brake assemblies, each brake assembly corresponds to a wheel set of the carrying platform, and each brake assembly is connected to an air source pipeline and a brake pipeline; The brake assembly includes an EBS valve, a stop valve, a brake and a speed sensor. The speed sensor is used to collect the speed data of the corresponding wheel group and is connected to the stop valve; the brake is used to achieve braking of the corresponding wheel group and is connected to the EBS; the stop valve is connected to the EBS valve and then connected to the air source pipeline and the brake pipeline.

2. The driving anti-skid system according to claim 1, characterized in that: The EBS valve is quickly connected to a control line in the tractor cab via a quick-change connector.

3. The driving anti-skid system according to claim 1, characterized in that: The brake is connected to an air booster pump via an oil circuit, and the air booster pump is connected to an air reservoir via an air circuit and the EBS valve; When the tractor controls the brake port pressure of the EBS valve, it controls the compressed air entering the EBS valve from the air reservoir to reach the air booster pump. The air booster pump then outputs the brake hydraulic oil, which enters the brake chamber of the brake to achieve braking of the corresponding wheel axle.

4. The driving anti-skid system according to claim 1, characterized in that: Each wheel axle of the carrying platform is connected to a self-driving motor, and the carrying platform can be self-propelled without being connected to a tractor; the speed sensor is integrated on the self-propelled motor, and a brake is also installed on the wheel axle of the self-propelled motor. In conjunction with the EBS valve of the braking system, the motor can automatically prevent overspeeding.

5. The driving anti-skid system according to claim 4, characterized in that: The brake adopts hydraulic drum brake, and the brake is arranged on the shaft end of the self-driving motor.

6. The driving anti-skid system according to claim 5, characterized in that: When the vehicle is self-propelled, a braking command is sent to the vehicle controller through the remote control, and the vehicle controller controls all EBS valves to implement corresponding braking; when the EBS valve receives the braking command, the EBS valve closes the normally open input solenoid valve and opens the normally closed input solenoid valve of the EBS valve at the same time, and implements corresponding braking on the corresponding wheels to realize the vehicle's driving braking function.

7. The driving anti-skid system according to claim 1, characterized in that: It also includes an EBS controller, which is used to receive the speed signal of the speed sensor and then output a braking signal to the EBS valve.

8. The driving anti-skid system according to any one of claims 1 to 7, characterized in that: During braking, the locking state of the wheel is quickly determined based on the speed signal from each wheel speed sensor, and the normally open input solenoid valve of the EBS valve on the wheel that begins to lock is closed to keep the braking force unchanged. If the wheel continues to lock, the normally closed output solenoid valve of the EBS valve is opened to reduce the braking pressure of the corresponding wheel.

9. The driving anti-skid system according to claim 8, characterized in that: When driving, the electronic stability program analyzes the vehicle speed signal and wheel angle signal to determine that the driving speed of the driving wheel exceeds the theoretical speed, and then sends a correction instruction to the EBS valve. First, it closes the normally open input solenoid valve of the EBS valve corresponding to the driving overspeed, and at the same time opens the normally closed input solenoid valve of the EBS valve to brake the overspeeding driving wheel.

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