JPH0781450A - Walking type mobile agricultural machinery - Google Patents

Abstract

PURPOSE:To simplify the operation of an accelerator lever by setting the length of a linking mechanism for a main clutch and a linking mechanism for an accelerator lever respectively so that an engine start position which is at a little higher speed than the idling position of an engine 1 may exist. CONSTITUTION:A structure for setting an engine 1 at a full rotation condition from an idling condition by ON/OFF-switching a main clutch 5, and to an engine start position and a light load rotation working position within a clutch OFF operating range is constituted by setting the length of the linking mechanism 6 of the main clutch 5 and the linking mechanism 10 of an accelerator lever 9a. The length of the linking mechanism 10 of the accelerator lever 9a is set for the linking mechanism 6 of the main clutch 5 so that the accelerator lever 9a may be operated to A-D positions by ON/OFF switching the main clutch 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walking type mobile agricultural machine such as a walking type management machine or a walking type cultivator.

[0002]

2. Description of the Related Art A conventional walk-behind cultivator has an actual open flat area of 3-23.
As shown in Japanese Patent Laid-Open No. 2 (1993), the accelerator lever of the engine is operated via an operating lever provided on the steering handle.

[0003]

Generally, when the engine is started, in order to improve the starting of the engine,
The accelerator lever of the engine is set to a position slightly higher than the idling state, and the engine is started via the recoil starter or the cell starter.

At the time of work such as plowing, the engine is operated at full rotation, and when the work is completed, the engine is operated in an idling state to reduce fuel consumption.

As described above, according to the above-described conventional structure, the operation lever provided on the steering handle has to be operated one by one.

An object of the present invention is to simplify the operation of the accelerator lever.

[0007]

To achieve the above object, the present invention is characterized in that a main clutch and an accelerator lever of an engine are linked to one operating lever through a linking mechanism, respectively, and the operation is performed. The main clutch disengagement position and engine idling position are located at one end of the lever operation range, the main clutch engaged position and engine maximum speed position are located at the other end, and the lever clutch disengagement position is extended to the engagement position. This is because the lengths of the linkage mechanism for the main clutch and the linkage mechanism for the accelerator lever are set so that the engine start position slightly higher than the idling state of the engine exists within the clutch disengagement operation range.

[0008]

When the operation lever is operated to the main clutch engaged position, the engine is operated in the full rotation state, and when the operation lever is operated to the main clutch disengaged position after finishing the work, the engine is operated to the idling state.

Since the engine start position, which is slightly faster than the idling state of the engine, is provided within the clutch disengagement operation range, by operating the operation lever to the engine start position when starting the engine, The engine can be started satisfactorily.

[0010]

Since the main clutch and the accelerator lever of the engine are linked to one operating lever, the engine rotation is automatically obtained in the optimum state when the main clutch is turned on and off, and the accelerator operation is complicated. Can be eliminated.

Further, as in the case where the accelerator lever is operated via the operation lever provided on the steering handle, after the engine is started, the operator forgets to operate the accelerator lever at the highest speed, and immediately after the main clutch is engaged, the engine is stopped. It is possible to avoid a stop, a so-called stalling.

[0012]

Embodiments of the present invention will be described below with reference to a walk-behind management machine.

FIG. 3 shows the entire walk-behind management machine. This walk-behind management machine has a recoil starter type engine 1, a transmission case 2, wheels 3, and a steering handle 4 at the rear of the traveling machine body A. The rotary tiller R is connected to perform the tilling work.

The power from the engine 1 is always transmitted to the transmission device in the transmission case 2 via the belt tension type main clutch 5 biased to the disengagement side to transmit the wheels 3 to the wheels 3.
And the power is transmitted to the transmission device in the rotary case via the transmission chain in the chain case 6 mounted on the side surface of the transmission case 2 to drive the tilling claw 8.

As shown in FIG. 1, the main clutch 5 is linked with an operating lever 7 provided on the steering handle 4 through a release wire 6 as a linking mechanism, and the operating lever 7 is connected to the operating lever 7.
Further, an accelerator lever 9a for operating the accelerator device 9 of the engine 1 is linked via a release wire 10 as a linking mechanism, and the engine 1 is changed from an idling state to a full rotation state as the main clutch 5 is turned on and off. It is configured to be operable.

As shown in FIG. 2, the disengagement position of the main clutch and the idling position A of the engine are set at one end of the guide groove 12 formed in the guide plate 11 for restricting the operation range L of the operation lever 7, and the other end is set. The main clutch engagement position and the engine maximum speed position D are set on the side so that the engine can be operated from the idling state to the full rotation state when the main clutch is engaged or disengaged.

Then, the engine start position B, which is slightly higher than the idling state of the engine, is set within the clutch disengagement operation range L ₁ from the clutch disengagement position A of the operation lever to the engagement position D, and the accelerator for engine starting is increased. Can be operated via the operation lever 7.

Further, a light load rotary working position C is set just before the engine maximum speed position D within the clutch engagement operation range L _{2 so that} a rotational speed slightly lower than the engine full speed can be obtained.

The operation lever 7 is provided with recesses 12a to 12d for lever engagement on the side surface of the guide groove 12 so that the operation lever 7 can be held at the set positions A to D, while the operation lever 7 is provided. Is biased toward the recess by a spring.

When the main clutch 5 is turned on and off, the engine 1 is in the idling state to the full rotation state, and
The structure for operating the engine start position and the light load rotation work position within the clutch disengagement operation range is the main clutch 5
Linkage mechanism 6 and the linkage mechanism 10 of the accelerator lever 9a.
Is set and configured.

That is, the linkage mechanism of the accelerator lever 9a with respect to the linkage mechanism 6 of the main clutch 5 is operated so that the accelerator lever 9a is operated to the above-mentioned positions A to D according to the on / off of the main clutch 5. A length of 10 is set.

As shown in FIG. 5, the wheel 3 has a hub 3
By integrating a and the wheel 3b, a hub-equipped wheel is manufactured symmetrically by deep drawing, facilitating the manufacture, and widening the mounting width of the hub to the axle to suppress wheel rattling. is there.

Further, as shown in FIG. 4, the walk-behind management machine is adapted to perform a plowing work by externally fitting a tubular shaft having a plowing claw 8 attached to an axle.

Further, as shown in FIG. 6, the hitch 13 for connecting the working device is provided with a slit 14a into which a plate-shaped resistance rod 15 can be inserted into the connecting hole 14 for connecting the working device in a state of being prevented from rotating. The resistance rod 15 is integrally formed and can be fixed to the plate 13a on the side surface of the hitch 13 via a set bolt 16 screwed together.

[Other Embodiments] The walk-behind mobile agricultural machine may be a walk-behind tiller, a walk-behind lawn mower, or a binder or a walk-behind rice transplanter.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a linked state of a main clutch, an accelerator lever, and an operation lever.

FIG. 2 is a plan view of a guide plate.

[Fig. 3] Overall side view

FIG. 4 is an overall side view of another embodiment.

FIG. 5 is a vertical sectional view of a wheel.

FIG. 6 is a perspective view of a hitch

[Explanation of symbols]

5 Main clutch 6 Coupling mechanism 7 Operation lever 9a Accelerator lever 10 Coupling mechanism A Clutch disengagement position C Engine start position D Clutch engagement position L Lever operation range L ₁ Clutch disengagement operation range

Claims (1)

[Claims] 1. The main clutch (5) and the accelerator lever (9a) of the engine are connected to one operating lever (7), respectively.
While linking through the linking mechanisms (6) and (10),
The main clutch disengagement position and the engine idling position (A) are provided at one end side of the operation range (L) of the operation lever (7).
, The main clutch engagement position and the engine maximum speed position (D) on the other end side, and the clutch disengagement operation range from the clutch disengagement position (A) of the operation lever (7) to the engagement position (D). A linkage mechanism (6) for the main clutch (5) and a linkage mechanism (10) for the accelerator lever (9a) so that an engine start position (C) slightly higher than the idling state of the engine exists in L ₁ ).
A walking type mobile agricultural machine in which the length of each is set.