JPH04136008U - Clutch operating device for remote control tractors - Google Patents

Abstract

(57) [Summary] [Purpose] In remote control type tractors,
The purpose is to improve safety and operability by allowing the clutch to be disengaged without any disengagement operation in an emergency or when a control circuit malfunctions. [Configuration] In a remote control tractor,
The radio transmitter 42 is provided with a clutch switch 52, the tractor body is provided with a radio receiver 55 and a control device that calculates and outputs the received signals and control signals of each control section, and the clutch operation system is operated by a solenoid valve. A clutch operating device for a remote control type tractor is provided with a clutch hydraulic cylinder 38 which operates to turn on the clutch when the clutch switch 52 is pressed.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a tractor clutch device that can be remotely controlled.

0002

[Conventional technology]

Traditionally, remote control tractors operate without pressing the clutch switch. to turn the clutch ON, and press the clutch switch to turn the clutch OFF. It was composed of

0003

[Problem that the idea aims to solve]

The known remote control tractor can be operated by disengaging the clutch in case of an emergency. There was a delay in stopping the body, which could lead to an accident.

0004

[Means to solve the problem]

This invention uses a clutch in the radio transmitter in a remote control tractor. A switch is installed on the tractor body to control the wireless receiver, its received signals, and each control section. A control device that calculates and outputs signals etc. is installed, and the clutch operation system is operated by a solenoid valve. A hydraulic cylinder for the clutch that moves is installed, and the clutch switch is closed while being pressed. By configuring the latch hydraulic cylinder to operate and turn on the clutch. The above-mentioned problem was solved.

[0005]

[Effect]

Remotely controlled tractors can be remotely steered and travel speed changed. When performing operations, turning the aircraft, or stopping the vehicle, the clutch should be used as a radio transmitter. When the latch switch is pressed, it turns ON and transmits power, and then remove your finger from the clutch switch. When released, the hydraulic cylinder is activated. Therefore, keep pressing the clutch switch The clutch is ON while the vehicle is in use, but in an emergency, do not press the clutch switch. If the operator falls down and drops the radio transmitter, the clutch can be When your finger leaves the switch, the clutch turns OFF immediately.

[0006]

【Example】

One embodiment of the present invention is explained about the tractor shown in the drawing.The driving section is located at the front. It consists of a steering wheel 1, a step 2, and a driver's seat 3. A clutch pedal 5, a pair of left and right brake pedals 6, 6 are provided on the other side, and the driver's seat The lever panel attached to the fender 7 on the side of A shuttle shift lever 9 is provided to switch between forward and reverse, and the rotor is located at the rear. The tiller 10 is mounted so that it can be raised and lowered by means of a top link and a lower link. The main shift lever 8 is attached to one end of the main shift operating shaft 8a, and the shuttle shift lever 9 is attached to one end of the main shift operating shaft 8a. Attach the boss so that it rotates integrally with the shuttle speed change operation shaft 9a, and hang it down from the boss. A pair of left and right pins 9e, 9e offset back and forth at the bottom of the plate-shaped operating arm 9b. is provided protrudingly, and one end of the front and rear shuttle speed change hydraulic cylinders 35, 35 is connected to the chassis. An elongated U-shaped locking member 9 is pivotally supported by a fulcrum shaft at the tip of the piston rod. f is fixed and loosely fitted onto the pin 9e.

[0007] Between the left and right frames at the front of the chassis 11, there is a steering hydraulic pressure distribution system that controls the steering system. Place the block 15 in front of the front axle case 12 and the front grill. Attach it as a balance weight so that it faces downward from step 13, and Or, on the lower right side, there is a hydraulic distribution block 1 for driving such as clutches, brakes, or gear changes. 6, which lowers the center of gravity of the aircraft and increases the lodging angle of the aircraft. It can be made difficult. Furthermore, since it is installed on the underside of Step 2, it can be used on existing tractors. It can be easily installed without any special modification.

[0008] The steering hydraulic pressure distribution block 15 and the traveling hydraulic pressure distribution block 16 are shown in FIG. To explain the hydraulic circuit shown, the pump for lifting and lowering the work equipment (A) (hydraulic circuit for this) illustration is omitted. ), steering control pump (b), and travel control pump (c) are installed in parallel, and the hydraulic oil discharged by the steering control pump (b) is connected to the steering control pump (b). A hydraulic distribution block 15, which is manually operated by the steering handle 1 through the hydraulic distribution block 15. and a fully hydraulic power steering circuit 17.

[0009] Interposed between the steering control hydraulic pump (b) and the pair of steering hydraulic cylinders 18 The above-mentioned steering hydraulic pressure distribution block 15 includes a quantitative flow dividing valve 19, a relief valve 20, The switching valve 21 for steering operation, the input flow switching valve 22 to the switching valve 21, and the ori The pressure oil from the steering control pump (b) is sent to the metered flow divider valve 19. The flow rate is controlled to be more constant and sent to the steering operation switching valve 21. This makes the operating speed of the steering hydraulic cylinder 18 suitable for remote control. If fine adjustment is required regarding the operating speed, the input flow rate can be changed. When the solenoid of the valve 22 is energized, the circuit is interrupted and the orifice 23 is passed through. The steering hydraulic cylinder 18 will operate at a low speed due to a small amount of pressurized oil, e.g. For example, when making fine adjustments to the turning angle of the front wheels, the steering speed is slowed down, and the excess oil at this time is The excess oil is returned to the tank from the relief valve 20, and the excess oil is controlled by the metered flow divider valve 19. The flow flows to a fully hydraulic power steering circuit 17.

0010 The traveling hydraulic pressure distribution block 16 has a low pressure relief valve 25, and a solenoid valve during work. The unload valve 26, which applies electricity to the right brake and puts it into a blocking state, and the hydraulic system for the right brake. A right brake switching valve 28 that cuts off and on the pressure oil to the cylinder 27, a hydraulic cylinder for the left brake The left brake switching valve 31, which intermittents the supply of pressure oil to the cylinder 30, to the main shift hydraulic cylinder 32. A main shift changeover valve 33 that connects and connects pressure oil to a pair of shuttle shift hydraulic cylinders 35, 3. Shuttle switching valve 36 for switching pressure oil to 5, and quick turn for increasing front wheel speed Pressure oil is supplied to the hydraulic cylinder 37 and the clutch hydraulic cylinder 38 for operating the main clutch. It is composed of a dual-purpose switching valve 39 that distributes the main transmission hydraulic cylinder 32. The rod 32a has a plate 32 parallel to it and having a magnet 32b. c is attached to the support plate 32e fixed to the outside of the cylinder 32d. Three reed switches 32f are attached at intervals, and the magnet 3 A shift sensor 66, which will be described later, is constructed by arranging the sensor 2b to face the movement locus of the shift sensor 2b. The main shift hydraulic cylinder 32 configured as follows has one end connected to the main shift operating shaft 8a. Connected to the arm 14 protruding from the other end via a long pin 14a in the horizontal direction so as to be movable laterally. The other end is connected to a bracket 14b installed upright on the transmission case.

[0011] The clutch pedal 5 and the brake pedal 6 have a return rotation near the fulcrum. A stopper 4 is provided oppositely to prevent the clutch pedal from moving, and the clutch pedal 5 is connected to the link 5. a, 5b, and the clutch arm 5c via the clutch hydraulic cylinder 38. The brake pedal 6 is connected to the links 6a, 6b and the link rod connected to the brake pedal 6. Via the right brake hydraulic cylinder 27 (or left brake hydraulic cylinder 30) The right (or left) brake hydraulic cylinder 2 is connected to the brake arm 6c. 7 is between the back surface of the piston 27a and the end surface of the rod protruding side of the cylinder 27b. A compression spring 27e is inserted to urge the rod 27c to retract. When hydraulic oil is pressurized from the oil port 27d, the stepped portion a of the rod 27c is inserted into the cylinder 27b. The rod 27c is pushed out until it comes into contact with the end face. In addition, the crack The hydraulic cylinder 38 for the piston has a rear surface of the piston 38a and a rod 27c that do not protrude. A compression spring 27e is interposed between the rod 27c and the inner end surface of the cylinder on the opposite side. The rod 27c is pushed out, and when hydraulic oil is pressurized from the oil port 27d, the rod 27c is pushed out. The back surface c of the stone 38a is pushed out to a position where it abuts the stepped portion d of the cylinder 27b. Ru.

0012 Pressure oil from the travel control pump (c) is supplied to the unload valve 2 when the aircraft is stopped. 6 and returns to the tank, and at this time, the left and right brake hydraulic cylinders 27 and 30 , because the built-in spring contracts and pulls the brake arm. The parking brake is activated, and when driving, unload valve 2 is activated. Since the solenoid No. 6 is energized, the operating state of the parking brake is released and the parking brake is also used. By energizing the switching valve 39 to the solenoid a, the clutch hydraulic series is switched. When pressure oil is sent to the cylinder 38, the clutch hydraulic cylinder 38 The main clutch is disengaged by compressing the ring and then by elastic biasing. The closed valve 40 is pushed open by the pressure oil, so the pressure oil is transferred to the shuttle switching valve. 36 and the main gear changeover valve 33, the aircraft becomes ready to travel, and in this state, the above-mentioned When the power to the solenoid a of the dual-purpose switching valve 39 is cut off, the clutch hydraulic cylinder 38 The pressure oil inside is pushed out by the expansion of the spring, and the orifice 41 The main clutch (multi-disc clutch) is connected slowly and the vehicle is driven. start.

[0013] During work, when the aircraft reaches the ridge and turns, the nose wheels are at the specified turning angle. When the quick turn switch is turned on, the solenoid b of the dual-purpose switching valve 39 is energized. Pressure oil is injected into the quick turn hydraulic cylinder 37, and the aircraft is When turning rapidly with the left and right brakes inactive, the turning angle of the front wheels returns to the set angle in the latter half of the turn. The power supply is cut off, the dual-purpose switching valve 39 returns to the neutral position, and the quick-turn hydraulic series The pressure oil in the engine 37 flows out, and the front wheels return to their normal rotational speed in sync with the rear wheels. left and right When using rake to correct the aircraft's running direction or turn, use either the left or right brake. When the power to the solenoids of the switching valves 28 and 31 is cut off, the series connected to them The spring in the cylinder pushes the piston and causes it to contract, so the pressure oil flows into the tank. and pull the brake arm to activate one brake.

[0014] The radio transmitter 42 has a single-pole, single-pole (spring) type push button switch on the top surface. An engine stop switch 43 consisting of an engine stop switch 43; A ring volume momentary 45, a pair of left and right brake switches 46 (single High-neutral-low switching (polar push-button switch) A single-pole twin-throttle type throttle switch 47 that can switch between up, neutral, and down. A single-pole double-sided lift arm switch 48 and a check lamp 50 are installed. , on the side, rotating forward will move forward, rotating backward will move backward, and the amount of rotation will be indicated. The main gear shifter can shift between 1st and 2nd speeds and 3rd and 4th speeds depending on the A clutch switch 51 is provided on the bottom surface, and a clutch switch 52 for connecting and disconnecting the main clutch is provided. This clutch switch 52 is a single-pole, single-fold type, and is always pressed with a finger to turn it on. It turns off when you release it, and since it is provided in the recessed part as shown in Figure 5, it can be accidentally turned off. There is no need to turn it on, it does not turn on even when placed on a stand, and it does not turn on when pressed. Since the fingers can fit into the recess, it is easy to maintain this state. 53 is a transmitting antenna.

[0015] The radio receiver 55 is located in a tool box provided on the underside of the left fender 56. , remote control changeover switch (switching between remote operation and manual operation) 57 and It is attached to the side of the proximity setting volume 58, and the received signal is sent to the front of the driving unit. The input is input to the remote control microcomputer unit 60 provided, and the remote control switch 57, proximity setting volume 58, and front facing center in the front grill 13. Proximity sensor 61 consisting of an attached ultrasonic sensor, a sensor that detects the turning angle of the front wheels. Tearing sensor 62, engine throttle sensor 63, shuttle speed change A shuttle sensor 65 that detects the position, a shift sensor 6 that detects the shift position of the main shift The detection results of step 6 are also input, and the microcomputer unit calculates these input values and outputs a buzzer. 67 and each switching valve for automatic control. 68 is the fascia behind the driver's seat 3. The receiving antenna is rotatably supported near the farmland side using a longitudinal axis. However, in fields with obstacles such as orchards, it can be placed on its side and stored in the space behind the driver's seat. Keep it in mind. There is no need for a special case for the proximity sensor 61, and there is no need for a special case for the proximity sensor 61. Obstacles can be detected accurately without being affected by noise.

[0016] The throttle control device is operated by turning the throttle switch 47 ON- as shown in FIG. The shaft rotates in forward and reverse directions based on the control signal from the microcomputer unit 60 based on the OFF signal. rotor motor 70, which is mounted on a shaft and rotated by the rotor motor 70; a cam plate 71 having an arcuate portion, and an arcuate surface A~ of the cam plate 71; It turns on between B and the throttle motor 70 rotates, and turns off when it exceeds that range. It consists of a limit switch 72 that stops when the cam plate 7 Connect the eccentric position of No. 1 and the upper end of the governor lever 73 with a throttle wire 74. Yes, the throttle switch 47 can be tilted from the standing position (OFF) to one side or the other. When turned on, the limit switch is activated by the cam plate 71 as shown in Figure 17. The throttle motor 70 rotates forward and backward within the range where 72 is ON, and the governor - Rotate the lever 73 in the forward and reverse directions. Note that the governor 73 is operated by a human operation system. It can also be operated.

[0017] When shifting manually, tilt the shuttle shift lever 9 forward. When tilting backward, the main gear shift lever 8 is moved to the neutral position (guide It moves forward and backward by pushing and pulling the horizontal groove of the groove to the left and right and rotating it back and forth. Each gear can be shifted from 1st to 2nd speed or 3rd to 4th speed, and can be remotely controlled in the field. If the main shift lever 8 is set to the 1st-2nd speed side or the 3rd-4th speed side in advance. Alternatively, the main shift lever 8 may be equipped with a hydraulic cylinder for lateral changes. The solenoid valve attached to the hydraulic cylinder of Move the operating shaft 8a to the left or right (1st-2nd speed side during work) to change gears during remote control. When the switch 51 is rotated forward, the rear shuttle shift hydraulic cylinder 35 is first activated. extends and tilts the shuttle gear change lever 9 forward to switch to forward movement, changing its rotation angle. The main transmission hydraulic cylinder 32 expands and contracts depending on the rotation angle and direction of rotation. Since the arm 14 on the opposite side of the gear shift lever 8 rotates back and forth, the main gear shift operating shaft 8a rotates to change gears. About reversing when the speed change switch 51 is turned backwards A gear change similar to that described above is performed. In addition, when manually changing the shuttle speed, the shuttle speed change lever 9 is tilted. and can be switched to forward or reverse. At that time, pins 9e and 9e are the shuttle shift lever. 9, but the pin 9e moves freely within the grooves of the locking members 9f, 9f. The shuttle speed change hydraulic cylinders 35, 35 control the tilting of the shuttle speed change lever 9. There is no obstruction.

[0018] Furthermore, when the main clutch is manually operated, the clutch hydraulic cylinder 38 is not operated. Since hydraulic oil is not press-fitted, it is in the engaged state, and the clutch pedal 5 is depressed. The clutch is disengaged by pressing the button, and during remote operation, the clutch switch 52 is pressed. As a result, hydraulic oil flows out from the clutch hydraulic cylinder 38 and the compression spring 27e pushes out the piston 27a and the clutch is turned on. When you release your finger from the switch 52, the hydraulic oil is press-fitted into the cylinder and is compressed. It will turn off automatically. In addition, when the brake is operated manually, the hydraulic cylinder for the right brake Since hydraulic oil is injected into the brake valve 27 (or 30) and it is in an extended state, the brake arm The brake pedal 6c is pushed upward and is in a non-braking state, and when the brake pedal 6 is depressed. The brake arm 6c rotates forward and downward to enter the braking state, and the remote During maneuvering, when correcting the running direction, or after completing one stroke and starting the next operation. When turning the aircraft to shift to the The brake solenoid valve switches and the hydraulic oil in the cylinder flows out, causing the brake hydraulic system to The cylinder 27 contracts due to the action of the compression spring 27e, and one brake is activated. Then, the traveling direction is corrected or the aircraft turns around.

[0019]

[Effect of the idea]

The present invention provides a wireless transmitter 42 in a remote control tractor. A switch 52 is provided on the tractor body, and a radio receiver 55 and its received signals are connected to each other. A control device that calculates and outputs control signals from the control section is installed, and the clutch operation system is equipped with a control device that calculates and outputs control signals. A clutch hydraulic cylinder 38 operated by a magnetic valve is installed, and the clutch switch When the clutch 52 is pressed, the clutch hydraulic cylinder 38 operates to turn the clutch ON. In an emergency, the clutch switch 52 can be pressed, such as by taking your finger off it. By simply stopping the clutch, the clutch is immediately disengaged without having to change hands, resulting in quick operation. can be dealt with accurately and accurately.

[Brief explanation of drawings]

FIG. 1 is a plan view of a tractor.

FIG. 2 is a side view of the same as above.

FIG. 3 is a hydraulic circuit diagram.

FIG. 4 is a plan view of the wireless transmitter.

FIG. 5 is a sectional view of the same as above.

FIG. 6 is a diagram showing transmission signals of a wireless transmitter.

FIG. 7 is an input/output diagram of the microcomputer unit.

FIG. 8 is a cross-sectional view of the main transmission section.

FIG. 9 is a sectional view of the rear connecting portion of the main transmission hydraulic cylinder.

FIG. 10 is a side view of the operation section.

FIG. 11 is a sectional view of the main transmission hydraulic cylinder.

FIG. 12 is a plan view of the shuttle speed change operating device.

FIG. 13 is a side view of a brake operating device and a clutch operating device.

FIG. 14 is a sectional view of a brake hydraulic cylinder.

FIG. 15 is a sectional view of a clutch hydraulic cylinder.

FIG. 16 is a side view of the throttle control device.

FIG. 17 is an operational diagram of a throttle switch, a limit switch, and a throttle motor.

[Explanation of symbols]

8 Main gear shift lever 9 Shuttle gear lever 10 Rotary tiller 11 Chassis 12 Front axle case 13 Front grill 14 Arm 15 Steering hydraulic distribution block 16 Hydraulic distribution block for traveling 18 Steering hydraulic cylinder 27 Hydraulic cylinder for right brake 32 Main transmission hydraulic cylinder 35 Shuttle speed change hydraulic cylinder 38 Hydraulic cylinder for clutch 42 Radio transmitter 51 Speed change switch 55 Radio receiver

Claims (1)

[Scope of utility model registration request] 1. In a remote control type tractor, a clutch switch 52 is provided in a wireless transmitter 42, and a wireless receiver 55 and a control device for calculating and outputting the received signal and control signals of each control section are provided in the tractor body. A clutch hydraulic cylinder 38 operated by a solenoid valve is interposed in the clutch operation system, and the clutch switch 5
2. A clutch operating device for a remote control tractor, characterized in that a clutch hydraulic cylinder 38 is actuated to turn on a clutch when 2 is pressed.