JP2594528Y2 - Operating device for towing vehicles such as tractors - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an operating device in a traveling vehicle such as a tractor in which an agricultural work machine such as a rotary cultivator or a civil engineering work machine is connected to be able to move up and down.

[0002]

Prior art and problems to be solved by the present invention have been disclosed by Japanese Utility Model Laid-Open No. 59-142821 and
Japanese Patent Application Laid-Open No. 0-121722 discloses that the operation of rotating two operation levers of a rice transplanter is separately operated, and that the operation of one operation lever simultaneously rotates the operation of the other operation lever. We proposed a mechanical configuration that can be selectively performed.

However, if only the mechanical structure is used,
When switching the operation, the operator must confirm the positional relationship between the two operation levers one by one. In addition, in order to connect the two operation levers, it is necessary to rotate one operation lever once in a direction orthogonal to the normal operation direction so as to approach the other operation lever. The required operation becomes complicated, and the required area of the operation unit must be increased.

The purpose of the present invention is to solve this problem.

[0005]

In order to achieve the above object, an operating device for a traveling vehicle according to the present invention is provided for a towing traveling vehicle such as a tractor having a work implement such as a rotary cultivator connected in a vertically movable manner. A traveling lever for changing the traveling speed and an operating lever for setting a working position such as raising and lowering the working machine are arranged close to each other, and the moving directions of the two levers are parallel to each other. In one of the operating devices, the traveling lever or the operating lever is provided with an interlocking member detachably connected to the other lever and its operating means, and the traveling lever is set at the lower speed position of the speed. A range of movement from
The operating range in which the operating lever rotates from the working position to the non-working position of the working machine corresponds to the operating range, and the operating lever is restricted so as not to be located in the range in which the running lever moves to the neutral position and the retracted position. When the mode changeover switch for switching between the mode and the work mode is switched to the work mode, the operation means is turned on to operate in a direction for connecting both levers via an interlocking member when the operation means is turned on.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described. FIG. 1 shows a tractor 1 having an engine 3 (see FIG. 2) as a traveling vehicle and a tractor 1 connected to the tractor via a link mechanism 4 so as to be able to move up and down. 1 shows a side view of a rotary tiller 2 towed and pulled. At the rear end of the tractor 1, the link mechanism 4 is moved up and down via an elevating hydraulic mechanism 5 and an elevating link 6, and is driven up and down so that the height position of the rotary tiller 2 with respect to the tractor 1 can be adjusted. The hydraulic pressure is supplied to the elevating hydraulic mechanism 5 and the like from a hydraulic pump (not shown) rotated by the driving force of the engine 3. Further, the tractor is moved forward and backward through the transmission (transmission mechanism) 7 by the power from the engine 3, while the PTO extending rearward from the rear end of the tractor 1.
Rotary tiller 2 to be described later via shaft 8 and universal joint shaft
And the claw body 9 is rotated clockwise in FIG.

Reference numeral 10 denotes a switch for detecting ON / OFF of a PTO shaft drive clutch provided in the work mission 11, and has a function as a mode changeover switch for switching between a traveling mode and a work mode. A traveling lever 12 for operating the traveling mission 7;
As shown in FIG. 2, an operation lever 13 for raising and lowering the rotary tiller 2 is rotatably supported by a support shaft 14, and is provided in operation slots 16 and 17 formed in an operation plate 15. Are arranged close to each other so as to be movable in parallel with each other. Then, as shown in FIG.
The operation slot 16 for the control lever 2 is set at a high speed step forward, and is set to a middle speed step, a low speed step, a neutral position, and a retreat position as going backward. The cultivator 2 is set to a lower position where the cultivator 2 is at the working position, and a non-operating position where the rear position is the ascending position. And make them correspond. In other words, the traveling lever 12 can be operated to the neutral position (N) and the retreat position (R), but the operation of the operation lever 13 to the lateral position is restricted by the operation slot 17.

An operating means 20 such as an electromagnetic solenoid is provided on the operation lever 13 side, and a locking groove 22 formed in a side surface (opposed surface) of the traveling lever 12 when the operating means 20 is turned on.
A pin 21 is provided as a connecting member that protrudes and fits into the connector. When the operating means 20 is turned off, the pin 21 is retracted, and the connection with the traveling lever 12 is released. Below the operation plate 15, a sensor (proximity sensor) 23 for detecting that the traveling lever 12 is located at the low speed stage is provided, and the sensor 23 and the switch 10 are connected to an input of a control device 24. And the output is connected to the actuation means 20. The control device 24 is of an electronic type, and has a central processing unit (CPU) such as a microcomputer and a read-only memory (R) storing a program for executing control and the like.
OM), a readable and writable memory (RAM) for temporarily storing various data, an input / output interface, and the like, which execute software-based control. The control, the rolling attitude control of the rotary tiller, the tillage depth control, and the like are also executed together. The control device 24 may be a hardware device that executes control by a combination of various electric circuits such as a limit switch and a relay.

Next, the operation control according to this configuration will be described. When the tractor 1 is advanced in the field and the rotary tilling machine 2 is lowered to perform the tilling operation, the traveling lever 12 is set to the low gear position. The sensing sensor 23 issues an ON signal. The operation lever 13 is set to a non-operation position, which is an ascending position of the rotary tiller 2.
Next, when the clutch of the work mission 11 is turned on, the switch 10 is turned on, and the control device 24 is switched to the work mode. And O in this work mode
N or ON of the switch 10 and O of the sensing sensor 23
The control device 24 determines the AND state with the N signal, turns on the operating means 20, and the pin 21 as a connecting member protrudes and fits into the locking groove of the traveling lever 12 so that both levers 12,
13 is connected. In this state, when the operation lever 13 is moved forward and the rotary tiller 2 is lowered,
Since the traveling speed of the tractor 1 is also set at the high speed position, the field is plowed at high speed.

When turning the tractor 1 at the end of the field, it is necessary to raise the rotary cultivator 2 once, and the traveling speed of the tractor 1 must be reduced for safe operation. At this time, when the operation lever 13 is rotated rearward, which is the non-working position, the traveling lever 12 can also be automatically positioned at the low gear. In this manner, the running speed of the tractor can be switched between the low speed stage and the high speed stage only by operating the operation lever 13 during the tilling operation.

Next, in a traveling mode such as traveling on a road, the clutch of the work mission 11 is turned off, and the switch 10 as mode switching means is also turned off. Is in the low-speed position, the control device 24 does not turn on the actuating means 20, so that the traveling lever 12 and the operating lever 13
Can be maintained in a blocked (released) state. In this traveling mode, the traveling lever 12 can be moved back and forth by itself, and can be arbitrarily set from the high speed gear to the reverse position.

It is needless to say that the present invention can be applied to not only a rotary cultivator but also other agricultural and civil engineering machines such as a multi-laying machine.

[0013]

[Operation and Effect of the Invention] As described above, the operating device of the present invention for towing a tractor or the like is used for towing traveling of a tractor or the like which is connected to a working machine such as a rotary cultivator so as to be able to move up and down. On the vehicle, a traveling lever for changing the traveling speed and an operating lever for setting a working position such as raising and lowering the working machine are arranged close to each other, and the moving directions of the two levers are parallel to each other. In the operating device set so that either one of the traveling lever and the operating lever is provided with an interlocking member detachably connected to the other lever and its operating means, and the traveling lever has a low speed The movement range in which the gear is rotated from the gear position to the high gear position and the movement range in which the operation lever is rotated from the work position of the work implement to the non-work position correspond to each other, and the traveling lever is in the neutral position and the retreat position. When the operation mode is switched to the work mode, the mode switching switch for controlling the operation lever to not be positioned in the range of movement and switching between the drive mode and the work mode is turned on. When the two levers are arranged sideways in the work mode, the two levers are connected to the image recognition means via the operating means and the connecting member. By simply moving the lever, it is possible to execute quick work. The operating lever and the traveling lever only need to have a space enough to move in parallel with each other. Even if one of the levers is not moved in a direction orthogonal to the moving direction, the operating lever and the connecting member can be used to move both levers. Since the connection state and the release state can be selected, there is an effect that the structure is extremely simple.

[Brief description of the drawings]

FIG. 1 is a side view of a tractor and a rotary tiller.

FIG. 2 is a functional block diagram of an operation unit and a control unit.

FIG. 3 is a view taken along line III-III of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tractor 2 Rotary cultivator 3 Engine 4 Link mechanism 5 Elevating hydraulic mechanism 6 Elevating link 7 Mission for traveling 8 PTO shaft 10 Switch 11 Mission for working 12 Traveling lever 13 Operating lever 16, 17 Operating slot 20 Operating means 21 Pin as a connecting member 23 Sense sensor 24 Control device

Claims (1)

(57) [Scope of request for utility model registration] 1. A traveling lever for changing a traveling speed, a work lever for changing a traveling speed, and a work for elevating and lowering the work machine, for a towed traveling vehicle such as a tractor having a work machine such as a rotary cultivator connected in a vertically movable manner. In an operating device in which the operating levers for position setting are arranged close to each other and the moving directions of the two levers are set to be parallel to each other, one of the traveling lever and the operating lever is provided with: An interlocking member detachably connected to the other lever and an operating means thereof are provided, and a moving range in which the traveling lever rotates from the low speed position to the high speed position, The operating range that rotates to the non-working position corresponds to the range in which the travel lever moves to the neutral position and the retreat position. A towing vehicle such as a tractor, characterized in that when the mode changeover switch is switched to a work mode, the operation means is turned on to operate in a direction connecting both levers via an interlocking member when the operating means is turned on. Operating device in