JPH0132810Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention has a control box equipped with a main operating tool and an auxiliary operating tool for an electric posture control mechanism that automatically drives and operates a working device relative to a vehicle body. The present invention relates to a structure of a control operation part in a work vehicle equipped with a check terminal for confirmation and an operation tool for fine adjustment of control operation.

In such a control operation section structure, if an auxiliary operation tool that is used less frequently than the main operation tool is left exposed, it may be accidentally operated by another object or accidentally operated by the operator. There is a risk of erroneous operation of the auxiliary operating tools, such as putting them away. Also, there is a risk of erroneous operation of the auxiliary operating tools. If the operating tools for adjustment are exposed, there is a risk that they may be deformed or damaged by contact with other objects, and there is also a risk that the operating tools for fine adjustment may be operated incorrectly, so avoid these risks. auxiliary operating tools, check terminals,
Also, it is necessary to cover each operating tool for fine adjustment.
The purpose of this invention is to have an easy-to-handle structure, an auxiliary operating tool,
The point is that the check terminal and the operating tool for fine adjustment are covered.

The characteristic structure of the control operation part structure in the work vehicle according to the present invention is such that the first cover covering the auxiliary operation tool is separate from the second cover covering each of the check terminal and the fine adjustment operation tool. The main feature is that it can be opened and closed freely.Next, the effects of the microstructure of the present invention will be described.

That is, auxiliary operating tools, check terminals, and
Each fine-adjustment operating tool is covered to prevent deformation and damage caused by contact with other objects and erroneous operation, and although it is used less frequently than the main operating tool,
The auxiliary operation tool, which is used more frequently than the check terminal and fine adjustment operation tool, can be easily operated while opening and closing the first cover, which can be opened and closed separately from the second cover, and at the same time, the check terminal and fine adjustment operation tool can be easily operated. Maintaining the state in which the adjustment operating tool is covered with the second cover,
It is designed to reliably prevent the fine adjustment operating tool from being erroneously operated.

Therefore, the configuration is advantageous in terms of operation because it allows easy operation of the auxiliary operating tool, and it also has a configuration that reliably prevents unexpected erroneous operations on the check terminal and the fine adjustment operating tool. It is now possible to cover each of the tools, check terminals, and fine adjustment operating tools.

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in Fig. 1, left and right rear wheel fenders 1, 1
A pair of left and right lift arms 3, 3 are provided at the rear of the tractor with a driver's seat 2 between them, which can be swung freely by a single-acting hydraulic cylinder 4, as well as left and right lower links 5, 5 and a top link 6. A rotary tiller 7, which is an example of a working device, is connected to the rear of the tractor so that it can be raised and lowered via a three-point linkage, and the pair of lift arms 3, 3 are connected to the left and right lower links 5, 5, respectively. The cultivating device 7 is connected to each other separately via a lift rod 8 and a double-acting hydraulic cylinder 9 for rolling operation, so that the tilling device 7 can be driven up and down with respect to the tractor, and
A riding cultivator is constructed that can freely operate the drive rolling, and the rolling control mechanism will be described below.

As shown in FIGS. 1 to 3, a sensor 10 is attached to the rear of the tractor for detecting the horizontal inclination angle of the tractor with respect to a horizontal plane as a fluctuation in a voltage signal, and a sensor 10 is installed at the rear of the tractor to detect the expansion/contraction position of the double-acting hydraulic cylinder 9. A sensor 11 is attached to the rolling operation cylinder 9. The sensor 11 detects the rolling posture of the tilling device 7 with respect to the tractor rolling posture, and outputs the detection result as a voltage signal fluctuation. Then, based on the signal from the inclination angle sensor 10, a target expansion/contraction position of the cylinder 9 suitable for maintaining the horizontal inclination angle of the tilling device 7 with respect to the horizontal plane within an appropriate range is calculated, and the voltage signal is adjusted accordingly. Comparing and determining the output arithmetic circuit 12 and the signal from it and the signal of the rolling sensor 11,
Accordingly, a discrimination circuit 15 is provided for selectively operating the shortening and extending operation circuits 14A and 14B of the electromagnetic cylinder control valve 13, and
The rolling cylinder 9 is configured to automatically extend and retract so that the horizontal inclination angle of the tilling device 7 with respect to the horizontal plane is maintained within a set range.

An inclination angle setting device 16 that outputs a voltage signal for changing the horizontal inclination angle of the tilling device 7 with respect to the horizontal plane.
and a set tilt angle changing circuit 17 that outputs a signal obtained by adding the signal from the tilt angle setter 16 to the signal from the arithmetic circuit 12 to the discrimination circuit 15.
is provided so that the horizontal inclination angle of the tilling device 7 to be maintained with respect to the horizontal plane can be changed and set.

A changeover switch 18 is provided for intermittent operation of the discrimination circuit 15 to enable switching between a rolling control state and a stop state, and a solenoid for shortening and extending the cylinder control valve 13. A neutral return type manual switch 19 is provided for selectively energizing 13A and 13B.

To calculate the target extension/contraction position in the arithmetic circuit 12, the swing angle of the lift arm 3 relative to the tractor is detected in order to increase the extension/contraction control amount as the tractor tilts by a unit angle as the lift arm 3 rises. The voltage signal of the sensor 20 is input to the arithmetic circuit 12. or,
Lift rod 8 and rolling operation cylinder 9
As the connection position for each lower link 5 is changed to two stages in the link longitudinal direction, the expansion and contraction control amount associated with unit angle tilting of the tractor is increased in two stages so that the amount of expansion and contraction that is attached to the free end side of the link is greater. A first selection switch 21 is provided for outputting a changing operation command to the arithmetic circuit 12 in order to make a change. moreover,
As the distance between the left and right lower links 5, 5 is changed in accordance with the specifications of the working equipment, the amount of expansion and contraction control that occurs when the tractor tilts by a unit angle is changed to two stages so that the amount of expansion and contraction is greater in the range where the distance is larger. A second selection switch 22 is provided for outputting a change operation command to the arithmetic circuit 12 in order to change the operation direction.

The storage case 24 for the electric control circuit section 23 in the rolling control mechanism is placed in the fender 1 on the right side.
The operation box 25 is connected to the fender 1 by bolts while being inserted into the front end of the fender 1, and an operation box 25 is connected to the front end of the storage case 24 and protrudes outward from the fender 1.

As shown in FIGS. 3 to 5, the upper wall of the operation box 25 is bent so that the front end is located lower than the rear end, and the rear end of the upper wall is provided with a control panel. Tilt angle setting device 1 as main operating tool
6. Changeover switch 18 and manual switch 19
At the same time, first and second selection switches 21 and 22 as auxiliary control devices are installed on the front end of the upper wall, and a check terminal for confirming control operation is installed on the front end of the upper wall. C ₀ , C ₁₀ ,
Five C ₁₁ , C ₁₇ , C ₂₀ and voltage regulators 10a, 11a, 20 as operating tools for fine adjustment of control operation
Three pieces a are installed.

That is, between the check terminal C10 connected to the circuit 10A that adds the signal of the first regulator 10a to the signal of the tilt angle sensor ₁₀ , and the check terminal connected to the common circuit, the so-called common terminal _C0 . Attach a voltmeter and check the tilt angle detection signal.
and a check terminal C ₁₁ connected to the circuit 11A that adds the signal of the second regulator 11a to the signal of the rolling sensor 11 to enable fine adjustment and achieve the same purpose, and the lift arm swing angle sensor 20. A check terminal C ₂₀ connected to the circuit 20A that adds the signal of the third regulator 20a to the signal of
are provided respectively, and furthermore, a circuit 17 for changing the set inclination angle is provided.
A check terminal _C17 connected to the circuit 17 is provided so that the signal from the circuit 17 can be checked.

a first cover 26 made of synthetic resin that can be opened and closed by swinging and covering the first and second selection switches 21 and 22;
A synthetic resin second cover 27 is provided to cover each of the five check terminals C ₁₀ and the three voltage regulators 10a to avoid deformation damage and erroneous operation caused by contact with other objects. .

The second cover 27 includes a first and a second cover.
A plate-like portion 27A having a hole through which each of the selection switches 21 and 22 is inserted is integrally formed.
At A is formed a locking piece 28 for fixing the cover closed, with which the free end of the first cover 26 is removably engaged. In order to attach the second cover 27 so as to be openable and closable, one of the check terminal fitting cylindrical parts 30 having an elastic deformation cutout groove 29 which is removably fitted and connected to the check terminal is provided. A screw 31 is provided for fixing the plate portion 27A to the operation box 25.

In constructing the first cover 26, a bent portion K having a small thickness is provided between the cover supporting plate portion 26A and the cover body. And the first cover 2
6, two check terminal fitting cylindrical portions 33 are provided which are provided with elastic deformation notch grooves 32 that penetrate through the second cover 27 and are removably fitted and connected to the check terminal. Thus, the first cover 26 is configured to be able to be opened and closed independently with respect to the second cover 27.

The operating section structure of the present invention can be applied to operating various posture control mechanisms such as rolling control mechanisms and elevation control mechanisms that are installed in various work vehicles such as combines in addition to tractors.

Further, in carrying out the present invention, for example, each of the first and second covers 26 and 27 may be screwed to the operation box 25, or the second cover 27 may be attached to the check terminal _C10.
The mounting structure of the first and second covers 26 and 27 can be changed in various ways, such as fitting the first cover 26 to the operation box 25 with screws.
The first cover 26 may be supported by the second cover 27 so as to be independently openable and closable.

[Brief explanation of the drawing]

The drawings show an embodiment of the structure of the control operation part in the working vehicle according to the present invention, and FIG. 1 is a perspective view showing the rear part of the riding cultivator, and FIG. 2 is a block diagram showing the specific configuration of the rolling control mechanism. Fig. 3 is a partially cutaway side view showing how the operation box is attached to the fender, and Fig. 4 shows the operation box, the first cover, and the
FIG. 5 is a perspective view of each of the second covers, and a cutaway front view showing the attached state of each of the first cover and the second cover. 7... Working device, 10a, 11a, 20a...
Fine adjustment operating tool, 16, 18, 19... Main operating tool, 21, 22... Auxiliary operating tool, 25... Operation box, 26... First cover, 27... Second cover, 33... Third 1 Cylindrical part for cover mounting, C ₀ , C ₁₀ ,
C ₁₁ , C ₁₇ , C ₂₀ ... Check terminals for checking control operation.

Claims (1)

[Claims for Utility Model Registration] Main operating tool 1 for an electric posture control mechanism that automatically drives and operates the working device 7 relative to the vehicle body.
6, 18, 19, and auxiliary operating tools 21, 22
The operation box 25 is equipped with check terminals C ₀ , C ₁₀ , C ₁₁ , C ₁₇ , and check terminals for confirming control operation.
C ₂₀ , and an operating tool 10a for fine adjustment of control operation,
11a and 20a are attached to a control operation part structure in a working vehicle, the auxiliary operation tool 21,
A first cover 26 covering the check terminals C ₀ , C ₁₀ , C ₁₁ , C ₁₇ , C ₂₀ and a second cover 27 covering each of the fine adjustment operating tools 10a, 11a, 20a A control operation part structure for a work vehicle that can be opened and closed independently. The first cover 26 for the auxiliary operating tools 21 and 22 is provided with a mounting cylindrical portion 33 that penetrates the second cover 27 and is removably fitted and connected to the check terminals C ₀ and C ₁₇ . A control operation part structure for a working vehicle as set forth in claim 1 of the utility model registration claim.