Mine bus passenger door control system

Abstract

The present invention provides a passenger compartment door control system for a mining passenger car, comprising a hydraulic motor serving as a power element for driving the passenger compartment door opening and closing, a hydraulic brake for braking the hydraulic motor, a shuttle valve for ensuring that pressurized oil can enter the hydraulic brake when the hydraulic motor needs to release the brake, an electromagnetic reversing valve for controlling the forward, stop, and reverse rotation of the hydraulic motor according to a control signal, an accumulator for providing high-pressure oil, an oil tank for returning oil, and an electronic control device for sending corresponding control signals to the electromagnetic reversing valve according to operating instructions and detection signals; the hydraulic motor is fluidically connected to the electromagnetic reversing valve, the hydraulic brake is fluidically connected to the electromagnetic reversing valve via the shuttle valve, the electromagnetic reversing valve is fluidically connected to the accumulator and the oil tank, respectively, and the electromagnetic reversing valve is electrically connected to the electronic control device; and when in use, the hydraulic motor is drivingly connected to the door shaft of the passenger compartment door. Compared to existing pneumatic passenger compartment door control systems, the present invention has a relatively simple structure, a low price, and is quieter during operation.

Description

Technical Field

[0001] The present invention relates to the technical field of passenger car doors, and in particular to a passenger compartment door control system for a mining passenger car. Background Art

[0002] Passenger buses typically have a cab door and passenger compartment doors (compartment doors). The compartment door control system is a component of the bus, used to automatically open and close the bus doors according to the driver's door opening and closing instructions during vehicle operation. Currently, common buses generally use outward-swinging passenger compartment doors. Their door control systems typically use pneumatic door pumps controlled by an electronic control device to drive the outward-swinging passenger compartment doors. However, these door control systems have the following shortcomings: First, pneumatic door pump-powered door control systems are complex and expensive; second, pneumatic door pump-powered door control systems generate relatively loud noise when opening and closing the doors during use; and third, for safety and economic reasons, the actuators on various vehicles used in coal mines are typically hydraulically powered, with more hydraulic power than air power. Existing door control systems powered by pneumatic door pumps are not effectively applicable to coal mine environments. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems existing in the prior art and provide a passenger compartment door control system for a coal mine passenger car that uses high-pressure oil accumulated in an on-board accumulator as power, has a relatively simple structure, a low price and makes less noise during operation, so as to meet the use needs of coal mine passenger cars.

[0004] The technical solution of the present invention is: the passenger compartment door control system of the mining passenger car of the present invention has the following structural features: it includes a hydraulic motor as a power element for driving the passenger compartment door when in use, a hydraulic brake for braking the above-mentioned hydraulic motor, a shuttle valve for ensuring that the pressure oil can enter the hydraulic brake when the hydraulic motor needs to release the brake, an electromagnetic reversing valve for controlling the forward rotation, stop and reverse rotation of the hydraulic motor according to a control signal, an accumulator for providing high-pressure oil as hydraulic power, an oil tank for returning oil, and an electronic control device for sending corresponding control signals to the above-mentioned electromagnetic reversing valve according to the door opening and closing operation instructions and the detection signal of whether the door is in place; the above-mentioned hydraulic motor is fluidly connected to the electromagnetic reversing valve, the hydraulic brake is fluidly connected to the electromagnetic reversing valve through the shuttle valve, the electromagnetic reversing valve is fluidly connected to the accumulator and the oil tank respectively, and the electromagnetic reversing valve is electrically connected to the electronic control device; when in use, the hydraulic motor is transmission-connected to the door shaft of the passenger compartment door.

[0005] A further solution is: the above-mentioned solenoid reversing valve has an oil inlet P, an oil outlet T, working ports A, B and electronic control terminals K1, K2; the solenoid reversing valve is fluidly connected to the above-mentioned accumulator through the oil inlet P, the solenoid reversing valve is fluidly connected to the above-mentioned oil tank through its oil outlet T, and the solenoid reversing valve is electrically connected to the electronic control device through its electronic control terminals K1, K2.

[0006] A further solution is: the above-mentioned hydraulic motor has oil inlet and outlet ports PT1 and PT2; the hydraulic brake has an oil inlet and outlet port PT, and the shuttle valve has oil inlet and outlet ports P1, P2, and P3; the oil inlet and outlet port PT1 of the above-mentioned hydraulic motor and the oil inlet and outlet port P1 of the shuttle valve are both fluidically connected to the working port A of the electromagnetic reversing valve; the oil inlet and outlet port PT2 of the hydraulic motor and the oil inlet and outlet P2 of the shuttle valve are both fluidically connected to the working port B of the electromagnetic reversing valve; the oil inlet and outlet PT of the hydraulic brake is fluidically connected to the oil inlet and outlet P3 of the shuttle valve.

[0007] A further solution is: the above-mentioned electronic control device includes a door opening button, a door closing button, a door opening limit sensor, a door closing limit sensor and a controller; the above-mentioned door opening button, door closing button, door opening limit sensor and door closing limit sensor are all electrically connected to the controller; the above-mentioned electronic control device is electrically connected to the electronic control terminals K1 and K2 of the electromagnetic reversing valve by its controller.

[0008] The present invention has positive effects: through the design of the overall structure, the present invention uses the high-pressure oil accumulated in the vehicle-mounted accumulator as power, and drives the opening and closing of the passenger compartment door of the bus through a hydraulic motor. Compared with the door control system in the prior art that uses a pneumatic door pump as power, the structure of the present invention is relatively simple and the cost is greatly reduced. During operation, the hydraulic control system of the present invention has significantly reduced operating noise compared to the pneumatic control system in the prior art, and can be effectively applied to the use environment of coal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0010] Figure 2 for Figure 1 The structural block diagram of the electronic control device is also shown in the figure. Figure 1 The electrical connection relationship of the electromagnetic reversing valve;

[0011] Figure 3 The figure is a schematic diagram of the connection relationship between the hydraulic motor and the door shaft of the passenger door when the present invention is used.

[0012] The reference numerals in the above drawings are as follows:

[0013] Hydraulic motor 1, hydraulic brake 2; shuttle valve 3, electromagnetic reversing valve 4, accumulator 5, oil tank 6;

[0014] Door shaft 7, connecting rod 8, passenger door 9. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] (Example 1)

[0017] See Figures 1 to 3 The passenger compartment door control system of the mining bus of this embodiment is mainly composed of a hydraulic motor 1, a hydraulic brake 2, a shuttle valve 3, an electromagnetic reversing valve 4, an accumulator 5, an oil tank 6 and an electronic control device.

[0018] The hydraulic motor 1 is used as the power element to drive the passenger door switch. Figure 3 As shown, hydraulic motor 1 is drivingly connected to door shaft 7 of the passenger door. The forward and reverse rotation of hydraulic motor 1 drives corresponding forward and reverse rotation of door shaft 7. The forward and reverse rotation of door shaft 7 drives the opening and closing of passenger door 9 via connecting rod 8. Hydraulic motor 1 is a commercially available component and has oil inlet and outlet ports PT1 and PT2 for oil flow. In this embodiment, hydraulic motor 1 preferably employs a BMR-250 model.

[0019] Hydraulic brake 2 is used to brake hydraulic motor 1 when oil supply to it is stopped after the door is fully opened or closed. This prevents the motor's rotational inertia, causing it to quickly stop and remain stationary. Hydraulic brake 2 is a commercially available component. It applies braking force through the action of a butterfly spring and releases the brake force through the hydraulic oil pressure. Hydraulic brake 2 has an oil inlet and outlet port PT. Its specific structure and operating principle are well-established in the art and are not described in detail. In this embodiment, hydraulic brake 2 preferably uses the BK913 model.

[0020] The shuttle valve 3 is used to ensure that the pressure oil can enter the hydraulic brake 2 when the hydraulic motor 1 needs to release the brake. The shuttle valve 3 is a commercially available part, preferably a RS417 shuttle valve, and the shuttle valve 3 has oil inlet and outlet ports P1, P2, and P3.

[0021] The solenoid reversing valve 4 controls the forward, stop, and reverse rotation of the hydraulic motor 1 by switching the oil circuit according to commands from the electronic control device. The solenoid reversing valve 4 is a commercially available component, preferably the GDFW-03-3C4-D24A / 53 model. The solenoid reversing valve 4 has an oil inlet P, an oil outlet T, working ports A and B, and electronic control terminals K1 and K2. The electromagnetic reversing valve 4 has three working positions: left, middle and right. When the left and right positions of the electromagnetic reversing valve 4 are both de-energized, the electromagnetic reversing valve 4 is in the middle position, and its working ports A and B are both connected to the oil outlet T. When the electronic control terminal K1 of the electromagnetic reversing valve 4 receives a control signal, the left electromagnet of the electromagnetic reversing valve 4 is energized, and the electromagnetic reversing valve 4 works in the left position. At this time, the oil inlet P of the electromagnetic reversing valve 4 is connected to the oil circuit of its working port A; when the electronic control terminal K2 of the electromagnetic reversing valve 4 receives a control signal, the right electromagnet of the electromagnetic reversing valve 4 is energized, and the electromagnetic reversing valve 4 works in the right position. At this time, the oil inlet P of the electromagnetic reversing valve 4 is connected to the oil circuit of its working port B.

[0022] The accumulator 5 is used to provide high-pressure oil as hydraulic power. The accumulator 5 is a commercially available component and is installed on the bus.

[0023] The oil tank 6 is used to receive the return oil and is provided on the bus.

[0024] like Figure 1 As shown, the oil inlet P and oil outlet T of the electromagnetic reversing valve 4 are fluidly connected to the accumulator 5 and the oil tank 6 respectively; the working port A of the electromagnetic reversing valve 4 is fluidly connected to the oil inlet and outlet PT1 of the hydraulic motor 1 and the oil inlet and outlet P1 of the shuttle valve 3; the working port B of the electromagnetic reversing valve 4 is fluidly connected to the oil inlet and outlet PT2 of the hydraulic motor 1 and the oil inlet and outlet P2 of the shuttle valve 3; the oil inlet and outlet PT of the hydraulic brake 2 is fluidly connected to the oil inlet and outlet P3 of the shuttle valve 3; and the electronic control terminals K1 and K2 of the electromagnetic reversing valve 4 are both electrically connected to the electronic control device.

[0025] See also Figure 2The electronic control device mainly consists of a door opening button, a door closing button, a door opening position sensor, a door closing position sensor, and a controller. The door opening button, door closing button, door opening position sensor, and door closing position sensor are all electrically connected to the controller. The electronic control device is electrically connected to the electronic control terminals K1 and K2 of the electromagnetic reversing valve 4 via its controller. The door opening button and door closing button are used by the driver to send door opening and door closing operation instructions to the controller respectively. The door opening position sensor and door closing position sensor are both commercially available. When in use, the door opening position sensor and door closing position sensor are used to detect whether the passenger compartment door is fully opened or fully closed, respectively, and send the detection signal to the controller in real time. The controller serves as the main control of the system. According to the command signals from the door opening button and door closing button and the detection information from the door opening position sensor and door closing position sensor, the electromagnetic reversing valve 4 is controlled accordingly, enabling the driver to operate the passenger compartment door. It should be noted that the door opening button, door closing button, door opening limit sensor, door closing limit sensor and controller are all commercially available parts, and the structure and working principle of each component are simple and mature existing technologies and will not be elaborated on.

[0026] The working process and principle of the passenger compartment door control system of the mining bus of this embodiment when in use are briefly described as follows.

[0027] When the driver presses the door opening button, the controller receives the door opening command and controls the electromagnetic reversing valve 4 to work in the left position through the electric control terminal K1 of the electromagnetic reversing valve 4. The oil inlet P is connected to its working port A. The pressure oil in the accumulator 5 enters the hydraulic brake 2 through the inlet and outlet oil ports P1 and P3 of the shuttle valve 3 and the inlet and outlet oil ports PT of the hydraulic brake 2. The hydraulic brake 2 releases the brake on the hydraulic motor 1. At the same time, the pressure oil in the accumulator 5 enters the hydraulic motor 1 through the inlet and outlet oil ports PT1 of the hydraulic motor 1. The forward rotation of the hydraulic motor 1 drives the door shaft 7 to rotate and drives the passenger door 9 to open through the connecting rod 8. When the passenger door 9 is fully opened, the door opening sensor detects a signal and feeds back to the controller. The controller controls the electromagnetic reversing valve 4 to return to the middle position. The inlet and outlet oil ports PT1 of the hydraulic motor 1 are connected to the oil outlet T through the working port A of the electromagnetic reversing valve 4. The hydraulic motor 1 stops rotating. At the same time, the hydraulic brake 2 is discharged from its inlet and outlet oil ports PT through the inlet and outlet oil ports P3 and P1 of the shuttle valve 6 and the electromagnetic reversing valve 4. The working port A is connected to the oil outlet T to release pressure, the hydraulic brake 2 brakes the hydraulic motor 1, and the passenger door 9 is locked in the open state.

[0028] Similarly, when the driver presses the door closing button, the controller receives the door opening command and controls the electromagnetic reversing valve 4 to work in the right position through the electric control terminal K2 of the electromagnetic reversing valve 4. The oil inlet P is connected to its working port B, and the pressure oil in the accumulator 5 enters the hydraulic brake 2 through the inlet and outlet ports P2 and P3 of the shuttle valve 3 and the inlet and outlet ports PT of the hydraulic brake 2. The hydraulic brake 2 releases the brake on the hydraulic motor 1. At the same time, the pressure oil in the accumulator 5 enters the hydraulic motor 1 through the inlet and outlet ports PT2 of the hydraulic motor 1. The hydraulic motor 1 rotates in the opposite direction, driving the door shaft 7 to rotate in the opposite direction and driving the passenger door 9 to close through the connecting rod 8. When the passenger door 9 is fully closed, the door closing sensor detects a signal and feeds back to the controller. The controller controls the electromagnetic reversing valve 4 to return to the middle position, and the inlet and outlet ports PT2 of the hydraulic motor 1 are connected to the oil outlet T through the working port B of the electromagnetic reversing valve 4. The hydraulic motor 1 stops rotating. At the same time, the hydraulic brake 2 is discharged from its inlet and outlet ports PT through the inlet and outlet ports P3 and P2 of the shuttle valve 6 and the electromagnetic reversing valve 4. The working port B is connected to the oil outlet T of the electromagnetic reversing valve 4 to release pressure, the hydraulic brake 2 brakes the hydraulic motor 1, and the passenger door 9 is locked in the closed state.

[0029] As can be seen from the foregoing, the passenger compartment door control system of the mining bus of this embodiment uses the high-pressure oil stored in the vehicle-mounted accumulator 5 as power through the overall structural design, and drives the opening and closing of the passenger compartment door 9 of the bus through the hydraulic motor 1. Compared with the door control system in the prior art that uses the pneumatic door pump as power, the passenger compartment door control system of the mining bus of this embodiment has a relatively simple structure and a greatly reduced cost. During operation, the noise is significantly reduced compared with the pneumatic control system in the prior art, and it can be effectively applied to the use environment of coal mines.

[0030] The above embodiments are illustrations of specific implementation methods of the present invention, rather than limitations of the present invention. Technicians in the relevant technical fields can make various changes and modifications to obtain corresponding equivalent technical solutions without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should be included in the patent protection scope of the present invention.

Claims

1. A passenger compartment door control system for a mining bus, characterized by: It includes a hydraulic motor that serves as a power element for driving the passenger compartment door to open and close when in use, a hydraulic brake for braking the hydraulic motor, a shuttle valve for ensuring that pressure oil can enter the hydraulic brake when the hydraulic motor needs to release the brake, an electromagnetic reversing valve for controlling the forward rotation, stop and reverse rotation of the hydraulic motor according to a control signal, an accumulator for providing high-pressure oil as hydraulic power, an oil tank for returning oil, and an electronic control device for sending corresponding control signals to the electromagnetic reversing valve according to the door opening and closing operation instructions and the detection signal of whether the door is in place; the hydraulic motor is fluidly connected to the electromagnetic reversing valve, the hydraulic brake is fluidly connected to the electromagnetic reversing valve through the shuttle valve, the electromagnetic reversing valve is fluidly connected to the accumulator and the oil tank respectively, and the electromagnetic reversing valve is electrically connected to the electronic control device; when in use, the hydraulic motor is transmission-connected to the door shaft of the passenger compartment door.

2. The passenger compartment door control system for a mining bus according to claim 1, characterized in that: The solenoid reversing valve has an oil inlet P, an oil outlet T, working ports A and B, and electronic control terminals K1 and K2; The electromagnetic reversing valve is fluidly connected to the accumulator via its oil inlet P, and is fluidly connected to the oil tank via its oil outlet T. The electromagnetic reversing valve is electrically connected to the electronic control device via its electronic control terminals K1 and K2.

3. The passenger compartment door control system for a mining bus according to claim 1, characterized in that: The hydraulic motor has oil inlet and outlet ports PT1 and PT2; the hydraulic brake has oil inlet and outlet port PT, and the shuttle valve has oil inlet and outlet ports P1, P2, and P3; the oil inlet and outlet port PT1 of the hydraulic motor and the oil inlet and outlet port P1 of the shuttle valve are both fluidically connected to the working port A of the electromagnetic reversing valve; the oil inlet and outlet port PT2 of the hydraulic motor and the oil inlet and outlet port P2 of the shuttle valve are both fluidically connected to the working port B of the electromagnetic reversing valve; the oil inlet and outlet port PT of the hydraulic brake is fluidically connected to the oil inlet and outlet port P3 of the shuttle valve.

4. The passenger compartment door control system for a mining bus according to claim 2 or 3, characterized in that: The electronic control device includes a door opening button, a door closing button, a door opening limit sensor, a door closing limit sensor and a controller; the door opening button, the door closing button, the door opening limit sensor and the door closing limit sensor are all electrically connected to the controller; the electronic control device is electrically connected to the electronic control terminals K1 and K2 of the electromagnetic reversing valve through its controller.

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