Rail transport vehicle

Abstract

The utility model discloses a rail transport vehicle which comprises a vehicle body, a dispatching system and a control system. The control system is arranged in the vehicle body; the control system comprises a controller, a frequency converter, a driver and a power supply; the scheduling system is communicated with the controller; the controller controls the frequency converter; the power supply supplies power to the driver; the frequency converter controls the driver through the power supply. According to the rail transport vehicle, the frequency converter is used for controlling the first driving device and the second driving device, the digital control technology of the controller is combined, more accurate control over all the driving devices can be achieved, the acceleration of acceleration and deceleration of all the driving devices can be adjusted and set according to the actual situation, and therefore the reliability of the rail transport vehicle is improved. The driving device can be controlled more accurately.

Description

Technical Field

[0001] The utility model belongs to the field of rail transport vehicles, and in particular relates to a rail transport vehicle. Background Art

[0002] Most rail transport vehicles now use DC motors to achieve variable frequency speed regulation. The structure of DC motors is relatively complex and the maintenance cost is high. Due to the existence of the commutator, the power increase space of DC motors is limited. The speed regulation of DC motors is achieved by adjusting the armature voltage. Therefore, when the armature voltage changes, the speed of the motor will also change. When the armature voltage decreases, the torque of the motor will also decrease, resulting in the motor being unable to withstand a large load at low speed. In addition, the use of DC motors for speed regulation also requires a set of corresponding DC power supply equipment, which will also increase the cost of the entire system. Utility Model Content

[0003] The utility model aims to provide a rail transport vehicle, which can more accurately control the output efficiency of the motor by adjusting the rotation speed of the motor through a frequency converter, thereby saving energy consumption and reducing the maintenance cost of the rail transport vehicle.

[0004] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0005] A rail transport vehicle comprises a vehicle body, a dispatching system and a control system; the control system is arranged inside the vehicle body; the control system comprises a controller, a frequency converter, a driver and a power supply; the dispatching system communicates with the controller; the controller controls the frequency converter; the power supply supplies power to the driver; the frequency converter controls the driver through the power supply.

[0006] The utility model discloses a rail transport vehicle, which uses a frequency converter to control a driver. Combined with the digital control technology of a controller, the driver can be controlled more accurately, and the acceleration and deceleration of the driver can also be adjusted and set according to actual conditions. By adjusting the driver through the frequency converter, the driver can be controlled more accurately, thereby saving energy. The frequency converter has a simple structure and low maintenance cost, and can also reduce the starting current of the driver and extend the life of the motor.

[0007] Preferably, the driver includes a first driving device; the vehicle body includes a driving wheel set; the first driving device drives the driving wheel set to rotate; and the driving wheel set controls the vehicle body to move forward or backward.

[0008] Preferably, the vehicle body further includes a driven wheel set; the driving wheel set drives the driven wheel set to rotate by controlling the vehicle body to move forward or backward.

[0009] Preferably, the driver further includes a second driving device; a lifting mechanism is further provided inside the vehicle body; and the second driving device controls the lifting mechanism to rise or fall.

[0010] Preferably, a detection device is also provided inside the vehicle body; the detection device obtains the motion state of the vehicle body and sends it to the controller.

[0011] Preferably, the detection device is a photoelectric encoder.

[0012] Preferably, the first driving device is a DC motor.

[0013] Preferably, the rail transport vehicle further includes a contactor; and the frequency converter controls the first drive device or the second drive device via the contactor.

[0014] Preferably, the second driving device is a hydraulic oil pump.

[0015] Preferably, the frequency converter controls the DC motor to accelerate or decelerate;

[0016] Alternatively, the frequency converter controls the hydraulic oil pump to rotate forward or reverse.

[0017] Beneficial effects:

[0018] The utility model discloses a rail transport vehicle, which uses a frequency converter to control a driver. Combined with the digital control technology of a controller, the driver can be controlled more accurately, and the acceleration and deceleration of the driver can also be adjusted and set according to actual conditions. By adjusting the driver through the frequency converter, the driver can be controlled more accurately, thereby saving energy. The frequency converter has a simple structure and low maintenance cost, and can also reduce the starting current of the driver and extend the life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shown is a structural diagram of a rail transport vehicle of an embodiment;

[0020] Figure 2 Shown is a structural block diagram of a control system of a rail transport vehicle according to an embodiment.

[0021] Reference numerals

[0022] 1. First driving device; 2. Frequency converter; 3. Second driving device; 4. Controller; 5. Driven wheel set; 6. Driving wheel set; 7. Detection device; 8. Lifting mechanism. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0024] The technical solution of the utility model is described in detail below with specific embodiments.

[0025] Example

[0026] like Figure 1 and 2 As shown, a rail transport vehicle of the present embodiment includes a vehicle body, a dispatching system, and a control system; the control system is arranged inside the vehicle body; the control system includes a controller 4, a frequency converter 2, a first drive device 1, a second drive device 3, and a power supply; the dispatching system communicates with the controller 4; the controller 4 controls the frequency converter 2; the power supply supplies power to the first drive device 1 and the second drive device 3; the frequency converter 2 controls the first drive device 1 and the second drive device 3 by converting the frequency of the power supply.

[0027] Preferably, a driving wheel set 6 is further provided inside the vehicle body; the first driving device 1 drives the driving wheel set 6; and the driving wheel set 6 controls the vehicle body to move forward or backward.

[0028] Preferably, a driven wheel set 5 is further provided inside the vehicle body; the driven wheel set 5 is transmission-connected with the driving wheel set 6 .

[0029] Preferably, the controller 4 sends a fast movement instruction to the frequency converter 2 to control the first drive device 1 to rotate quickly; or the controller 4 sends a slow movement instruction to the frequency converter 2 to control the first drive device 1 to decelerate.

[0030] Preferably, a lifting mechanism 8 is further provided inside the vehicle body; the second driving device 3 controls the lifting mechanism 8 to rise or fall.

[0031] Preferably, the controller 4 sends a pickup instruction to the frequency converter 2 to control the second drive device 3 to rotate forward; or the controller 4 sends a discharge instruction to the frequency converter 2 to control the second drive device 3 to rotate reversely.

[0032] Preferably, a detection device 7 is further provided inside the vehicle body; the detection device 7 obtains the motion state of the vehicle body and sends it to the controller 4 .

[0033] Preferably, the detection device 7 is a photoelectric encoder.

[0034] Preferably, the first driving device 1 is a DC motor.

[0035] Preferably, the second driving device 3 is a hydraulic oil pump motor.

[0036] Specifically, the frequency converter of this embodiment is an AC frequency converter, and the rail transport vehicle is transported on rails.

[0037] Furthermore, in this embodiment, the mains power is reduced to AC36V by a step-down transformer to supply power to the track. The driving wheel set 6 and the driven wheel set 5 of this embodiment realize the four-wheel drive of the vehicle body. The power supply is obtained by the rail transport vehicle from the transport track through the four wheels, and then the power supply is stepped up to AC 220V power supply through a step-up transformer, and then the AC inverter 2 is used to realize the precise control of the DC motor and the hydraulic oil pump.

[0038] Specifically, the controller of this embodiment is a PLC.

[0039] Furthermore, the rail transport vehicle of this embodiment can be applied to the field of warehouse automation logistics management such as ceramic enterprises, wherein the rail transport vehicle shuttles back and forth on a fixed track to transport goods, the lifting mechanism includes a pallet, and the detailed action steps are: lifting the pallet to pick up goods at the pickup point - driving to the unloading point - slowing down at the unloading deceleration point - lowering the pallet to unload at the unloading point - returning to the pickup point - slowing down at the pickup deceleration point - picking up goods at the pickup point, and the movement of the rail transport vehicle and the lifting and lowering actions when picking up and unloading goods are all completed by the AC inverter to control the motor.

[0040] Furthermore, in actual applications, the PLC sends a fast-moving instruction to the frequency converter 2 to control the DC motor to rotate quickly, and the trolley runs quickly to the vicinity of the target point; the PLC sends a slow-speed instruction to the frequency converter 2 to control the DC motor to decelerate, and the trolley reaches the target point slowly; the PLC sends a pick-up instruction or an unloading instruction as needed to control the frequency converter 2 to drive the hydraulic oil pump to rotate forward or reverse, thereby realizing the lifting and retrieving functions of the jacking mechanism 8.

[0041] Specifically, the lifting mechanism 8 of the present embodiment is a pallet driven by a hydraulic oil pump.

[0042] Specifically, this embodiment uses a contactor to switch the control of the motor by the inverter 2, so that the inverter 2 controls the DC motor or the hydraulic oil pump; when the inverter 2 controls the DC motor, the inverter 2 accelerates or decelerates the DC motor by changing the power supply voltage of the power supply; when the inverter 2 controls the hydraulic oil pump, the controller 4 sends a signal to the inverter 2, and the inverter 2 controls the forward or reverse rotation of the hydraulic oil pump according to the signal sent by the controller 4.

[0043] Specifically, Figure 1As shown, the vehicle body of this embodiment uses the side direction of the DC motor as the front side of the rail transport vehicle. The PLC is placed in the control box at the rear of the rail transport vehicle as the main control system, which is responsible for communicating with the external dispatching system and determining the movement state of the rail transport vehicle based on the feedback of each photoelectric encoder. The PLC transmits the signal to the AC inverter 2 in the middle, and the AC inverter 2 controls the hydraulic oil pump and the DC motor respectively. The hydraulic oil pump controls the lifting mechanism 8 through the frequency conversion signal to complete the lifting and storage and retrieval tasks of the goods; the DC motor is used as a power source to drive the active wheel pair 6 and drive the driven wheel pair 5 to complete the forward and backward tasks of the rail transport vehicle.

[0044] Specifically, the AC inverter 2 sets the setting values ​​corresponding to the speeds of the DC motor and the hydraulic oil pump according to needs, such as no-load speed, light-load speed, heavy-load speed, etc.

[0045] Specifically, the PLC is connected to the frequency converter 2 via the RS-485 communication protocol.

[0046] Specifically, the PLC communicates with the frequency converter 2 by judging the actual situation, and modifies the internally set frequency value or transmits a start signal to the frequency converter.

[0047] Specifically, the frequency converter 2 converts the 220V 50Hz AC power supply into an AC power supply with a different frequency according to the signal to control the control motor and the hydraulic oil pump motor.

[0048] Specifically, the control motor completes the actions of slow moving of heavy loads, fast placement of empty loads, and smooth switching of fast and slow speeds according to the signal of the frequency converter 2; the hydraulic oil pump controls the jacking mechanism to complete the functions of rising to pick up goods and descending to unload goods according to the signal.

[0049] A rail transport vehicle of the present embodiment uses a frequency converter 2 to control a DC motor and a hydraulic oil pump. Combined with the digital control technology of the controller, the rotation speed of the DC motor and the hydraulic oil pump can be more accurately controlled, and the acceleration of the DC motor and the hydraulic oil pump can also be adjusted and set according to actual conditions; by adjusting the rotation speed of the DC motor and the hydraulic oil pump by the frequency converter 2, their output efficiency can be more accurately controlled, thereby saving energy consumption; this frequency converter 2 has a simple structure and low maintenance cost, and can also reduce the starting current of the DC motor and the hydraulic oil pump, thereby extending the life of the motor.

[0050] Specifically, the photoelectric encoder of this embodiment converts the displacement into an electrical signal in the form of a "digital code" through photoelectric conversion, which is commonly used in the art.

[0051] Specifically, the function of the hydraulic oil pump is to convert the mechanical energy of the prime mover into the pressure energy of the liquid. For example, the oil pump in the hydraulic system can provide power to the entire hydraulic system and is commonly used in the art.

[0052] The above is a detailed description of an embodiment of a rail transport vehicle provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A rail transport vehicle, characterized in that: The vehicle comprises a vehicle body, a dispatching system and a control system; the control system is arranged inside the vehicle body; the control system comprises a controller (4), a frequency converter (2), a driver and a power supply; the dispatching system communicates with the controller (4); the controller (4) controls the frequency converter (2); the power supply supplies power to the driver; the frequency converter (2) controls the driver through the power supply; The driver comprises a first driving device (1); the vehicle body comprises a driving wheel set (6); the first driving device (1) drives the driving wheel set (6) to rotate; the driving wheel set (6) controls the vehicle body to move forward or backward; The first driving device (1) is a DC motor.

2. The rail transport vehicle according to claim 1, characterized in that: The vehicle body also includes a driven wheel set (5); the driving wheel set (6) drives the driven wheel set (5) to rotate by controlling the vehicle body to move forward or backward.

3. The rail transport vehicle according to claim 1, characterized in that: The driver further comprises a second driving device (3); a lifting mechanism (8) is also provided inside the vehicle body; and the second driving device (3) controls the lifting mechanism (8) to rise or fall.

4. The rail transport vehicle according to claim 1, characterized in that: A detection device (7) is also provided inside the vehicle body; the detection device (7) acquires the motion state of the vehicle body and sends it to the controller (4).

5. The rail transport vehicle according to claim 4, characterized in that: The detection device (7) is a photoelectric encoder.

6. The rail transport vehicle according to claim 3, characterized in that: The rail transport vehicle further comprises a contactor; the frequency converter (2) controls the first drive device (1) or the second drive device (3) via the contactor.

7. The rail transport vehicle according to claim 3, characterized in that: The second driving device (3) is a hydraulic oil pump.

8. The rail transport vehicle according to claim 7, characterized in that: The frequency converter (2) controls the DC motor to accelerate or decelerate; Alternatively, the frequency converter (2) controls the hydraulic oil pump to rotate forward or reverse.

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