JPH0332425Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a handle structure for a walk-behind cultivator.

[Conventional technology]

This type of conventional handle structure has a pair of left and right handle rods extending from a handle frame fixed to the aircraft frame, and a lever box for hand operation protrudes from each of the handle rods.

[Problem that the invention attempts to solve]

For a handle with the above structure, it may be possible to install an operation panel with electrical switches such as the main switch and tillage depth setting device at a separate location from the handle, but the location The panel must be located far from the operator's hand, which impairs operability and requires a new support frame to support the operation panel.

An object of the present invention is to provide a device that can improve operability and simplify the support structure of the operation panel by effectively selecting the mounting position of the operation panel.

[Means for solving problems]

The feature of the present invention is that the handle structure of the walk-behind cultivator is configured as follows. In other words, a pair of left and right handle rods extends from the handle frame fixed to the aircraft frame, and a lever box that supports the operating levers that are mechanically interlocked and connected to each device provided on the aircraft body is protruded from the handle rod. An operation panel for electrical equipment is installed across the left and right lever boxes.

[Effect]

The operating lever as described above is mechanically linked to each device by means of linking rods, wires, etc., so that when the operating lever is operated, a reaction force is applied to the lever box that supports the operating lever.
Therefore, this lever box is manufactured with sufficient strength to withstand the operation reaction force.

As a result, if the operation panel for electrical equipment is installed across the left and right lever boxes as described above, this operation panel will be supported with sufficient strength by the left and right lever boxes. Therefore, there is no particular need for a frame dedicated to supporting this operation panel.

Furthermore, since this operation panel is connected and supported to the handle rod via the lever box, the operation panel is close to the operator who is located on the handle rod side. Therefore, each switch provided on this operation panel becomes easier for the operator to operate.

[Effect of idea]

As described above, the lever box, which is an existing structure, can be effectively utilized and used as a frame for supporting the operation panel, and the structure around the operation panel can be simplified. Furthermore, the operation panel can now be placed closer to the operator, making it possible to improve the operability of each switch on the operation panel.

〔Example〕

As shown in FIG. 6, a pair of left and right propulsion wheels 1,
A tilling rotary 2 is located behind the rotary 1, an engine 3 and a transmission case 20 are provided at the front of the aircraft, and a control handle 4 is extended toward the rear of the aircraft at the rear end of the self-propelled aircraft, so that the rotary 2 acts after tilling. A tail wheel 5, which is one of the ground-contacting bodies arranged, is arranged in series, and the tail wheel 5 can be raised and lowered freely by a drive mechanism 6, and the tail wheel 5 can be moved up and down by a drive mechanism 6. Based on the inclination sensing operation, the tail wheel 5 is configured to be able to automatically raise and lower, and by raising and lowering the tail wheel 5 with respect to the wheel 1, the depth of penetration of the tilling rotary 2 into the ground becomes a set value. It is configured as a type tiller.

As shown in FIG. 5, a lifting mechanism 6 for the tail wheel 5
In detail, the support shaft 8 of the tail wheel 5 is fitted and held in a support tube 9 fixed to the aircraft body side, and the screw shaft 10 screwed into the axial center position of the support shaft 8 is inserted into the support tube 9. Fix the position inside and hold this screw shaft 1.
0, the tail wheel 5 can be slidably operated via the support shaft 8, and the screw shaft 10 is interlocked with a motor 13 with a reducer 12 via a bevel gear mechanism 11 provided at its upper end. A drive mechanism 6 is configured by connecting them.

As shown in FIGS. 2 and 3, a support frame 14 supporting a weight 16 at the lower end is attached to an input shaft 15A of a potentiometer 15 fixed to a case.
The potentiometer 15 is fitted onto the outside so as to be able to swing left and right around the input axis P, and the potentiometer 15 is configured as a detector that electrically detects the amount of swing of the weight 16, and the weight 16 is The tilt sensor 7 is configured to swing within silicone oil 17 that exerts a damper effect.

As shown in FIG. 4, the mission case 2
A swing type operating arm 22 of a clutch 21 that connects and disconnects the power transmitted to the tilling rotary 2 provided at 0
An electromagnetic solenoid 23 which is turned off when energized is interlocked, and a hand-operated lever 19 that allows manual operation of the clutch 21 is interlocked with the operating arm 22 via a flexible spring 18. Even when the operating lever 19 is set to the engaged position, the electromagnetic solenoid 23 can be operated to disengage the clutch 21 by the flexible force of the spring 18. In the figure, 44 is a spring that biases the clutch 21 toward the incision side.

As shown in FIG. 7, after comparing the machine inclination angle detection value of the inclination sensor 7 and the setting value from the plowing depth setting device 24 provided at the operator's hand side by comparison circuits 25 and 26, the setting value is When the signal from the inclination sensor 7 is large, the signal is transmitted to the motor 13 via a drive circuit 36 and a relay circuit 38 operated by the drive circuit 36 to lower the tail wheel 5; If the signal from the tilt sensor 7 is smaller than the set value, the drive circuit 37 and relay circuit 39
A plowing depth control circuit is configured to transmit a signal to the motor 13 via the plowing depth control circuit to raise the tail wheel 5.
Further, for this plowing depth control circuit, an operation control circuit for the rotary clutch 21 is provided, and more specifically, an operation regulator 28 for the electromagnetic solenoid 23 is provided,
After the value from the tilt sensor 7 and the value from the actuation regulator 28 are compared in a comparator circuit 29, the tilt sensor 7
is configured to output an output to the solenoid 23 via the drive circuit 27 when the aircraft senses a large forward downward slope of the aircraft, and when the aircraft is in a large forward downward slope at the edge of a ridge, etc., the solenoid 23 is activated. The clutch 21 is configured to be actuated to disengage the clutch 21. In addition, 30 in the figure is a setting device for setting the reference setting range B in the weight operation of the tilt sensor 7, and when the field surface unevenness is small, the signal from the sensor 7 is assumed to be absent, and the frequency of the tail wheel 5 is set. This prevents undesirable operation.

As shown in FIG. 1, the structure of the control handle 4 is explained in detail. A pair of left and right handle rods 31, 31 extend from a handle frame 33 fixed to the aircraft frame, and a pair of left and right handle rods 31, 31 Lever boxes 34, 34 for hand operation are provided in a protruding manner, respectively. These lever boxes 34, 34 have
Cultivating rotary 2 clutch 21 and wire (not shown)
An operating lever 19 is mechanically interlocked with a spring 18, and an operating lever 35 is mechanically interlocked with a dual transmission (not shown). (However, a dual transmission is one in which the transmission ratio is kept smaller than a normal one,
It is constructed so that it can be directly changed from high speed to low speed without disengaging the main clutch when the field becomes hard and high torque is required. ) An operation panel 32 for electrical equipment is removably installed across the lever boxes 34, 34, and includes a main switch 40, a plowing depth setting device 24, etc.

In the figure, 41 is a main clutch operating lever, 42 is a side clutch operating lever, and 43 is a main shift lever.

[Brief explanation of the drawing]

The drawings show an embodiment of the handle structure of the walk-behind cultivator according to the present invention, in which Fig. 1 is an overall plan view, Fig. 2 is a partially cutaway front view of the inclination sensor, and Fig. 3 is a longitudinal side view of the inclination sensor. , Fig. 4 is a side view showing the operating structure of the rotary clutch, Fig. 5 is a partially cutaway side view showing the drive mechanism of the grounding body, Fig. 6 is a side view of the walk-behind cultivator, and Fig. 7 is the control circuit. It is. 19, 35...operation lever, 31...handle rod, 32...operation panel, 33...handle frame,
34...Leverbox.

Claims (1)

[Scope of utility model registration request] A pair of left and right handle rods 31, 31 extend from a handle frame 33 fixed to the fuselage frame, and a lever box supports operating levers 19, 35 that are mechanically interlocked and connected to each device provided in the fuselage. 34, 34 to the handle rods 31, 31
The left and right lever boxes 34, 34
A handle structure of a walk-behind cultivator in which an operation panel 32 for electrical equipment is installed over the entire length.