JPH0132809Y2 - - Google Patents

Description

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

In such a structure of the operating section, if the check terminal or the operating tool for fine adjustment is left exposed, not only is there a risk of deformation and damage due to contact with other objects, but also the operating tool for fine adjustment may be operated incorrectly. It is necessary to cover these terminals and operating tools that are not used in normal working conditions due to the risk of damage. , the point is to cover it with a simple structure that makes effective use of existing members.

The characteristic configuration of the control operation section structure for a working vehicle according to the present invention is that a cover covering each of the check terminal and the fine adjustment operation tool is removably fitted and connected to the check terminal; , its effects will be described.

That is, by opening and closing one cover, the check terminal and the fine adjustment operating tool can be switched at once between a covered state and an exposed state, and furthermore, the cover body can be checked using the check terminal. By removably fitting and connecting to the terminal, compared to adopting a structure in which the cover body is fixed with screws, for example, it is easier to open and close the cover body, and the cover body mounting structure is simplified. be able to.

Therefore, the check terminal has an excellent configuration in terms of use, as only one cover body can be opened and closed, which is easy to open and close, and also has an excellent configuration in terms of manufacturing, since the operation box does not need to be modified to attach the cover body. It is now possible to cover the fine adjustment operation 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. In contrast, the tilling device 7 is connected separately via a lift rod 8 and a double-acting fluid pressure cylinder 9 for rolling operation, so that the tilling device 7 can be driven up and down with respect to the tractor, and can also be driven and rolled. A tiller is constructed, and the rolling control mechanism will be explained 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. Based on the signal from the inclination angle sensor 10, a calculation circuit 12 calculates a target expansion/contraction position of the cylinder 9 with respect to the horizontal plane of the tilling device 7, and outputs a voltage signal accordingly, and a signal from the calculation circuit 12. A discrimination circuit 15 is provided for comparing and discriminating the signal from the rolling sensor 11 and selectively operating the shortening and extending operation circuits 14A and 14B of the electromagnetic cylinder control valve 13 accordingly. 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 1 that outputs a voltage signal for changing the left and right inclination angle of the tilling device 7 with respect to a horizontal plane.
6, and outputs a signal obtained by adding the signal from the arithmetic circuit 12 and the signal from the inclination angle setter 16 to the discrimination circuit 15.
7 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 so that rolling control can be switched from a state to a stop state, and a solenoid for shortening and extending the cylinder control valve 13 is provided. Neutral return type manual switch 19 for selectively energizing 13A and 13B
is provided.

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 from 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 into two stages in the link longitudinal direction, the two stages are installed so that the amount of expansion and contraction that is controlled when the tractor tilts by a unit angle is greater when the link is attached to the free end side. A first selection switch 21 is provided for outputting a changing operation command to the arithmetic circuit 12 in order to change the setting. Furthermore, as the spacing between the left and right lower links S, S is changed to match the specifications of the working equipment, the amount of expansion and contraction control that occurs when the tractor tilts by a unit angle is increased in the range where the spacing is larger. A second circuit that outputs a change operation command to the arithmetic circuit 12 in order to change to the second stage.
A selection switch 22 is provided.

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 the 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 synthetic resin first covering each of the five check terminals _C10 ... and the three voltage regulators 10a...
Three cylindrical portions 27 that are removably fit elastically into three of the check terminals C ₁₀ are attached to the cover 26.
Formed with a notch groove 28 for elastic deformation,
In addition, the first cover 26 is configured to prevent other objects from coming into contact with the terminals C ₁₀ and the regulators 10a, and to prevent the regulators 10a from being operated erroneously. It is designed to be simple and easy to install using terminal _C10 .

A second cover 29 which covers the first and second selection switches 21 and 22 and which is swingable and can be opened and closed, is provided with a small bent part K and is fixed to the first cover 26 with screws. This is designed to prevent the first and second selection switches 21 and 22 from being erroneously operated.

FIG. 6 shows another embodiment in which the first cover 26
A swingable cover 30 covering the first and second selection switches 21 and 22 is screwed to the operation box 25.

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.

In addition, to implement the present invention, as long as the check terminal is used to attach the cover, such as by fitting a part of the first cover 26 to the check terminal and screwing a part to the operation box 25, the present invention can be carried out. can reach the purpose of

Further, the present invention may be implemented without providing the auxiliary operating tools 21 and 22 for control, and even if provided, the specific mounting structure thereof can be modified in various ways.

[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
A perspective view of each of the second covers, FIG. 5 is a cutaway front view showing the installation state of each of the first cover and the second cover,
FIG. 6 is a perspective view of another embodiment. 7... Working device, 10a, 11a, 20a...
Fine adjustment operating tool, 16, 18, 19... operating tool,
25...Operation box, 26...Cover.

Claims (1)

[Scope of utility model registration request] Operating tool 16, 1 for an electric posture control mechanism that automatically drives and operates the working device 7 relative to the vehicle body
8, 19, check terminals C ₀ , C ₁₀ , C ₁₁ , C ₁₇ , C ₂₀ ,
And operating tools 10a, 11 for fine adjustment of control operation
A, 20a is attached to the control operation part structure of a working vehicle, and the check terminals C ₀ , C ₁₀ ,
C ₁₁ , C ₁₇ , C ₂₀ and the fine adjustment operating tool 10a,
11a and 20a are detachably fitted and connected to the check terminals C ₀ , C ₁₀ , C ₁₁ , C ₁₇ , and C ₂₀ .