JPH0297317A - Holder for operating lever position of walking type grass mower - Google Patents

Abstract

PURPOSE:To vertically move an extension shaft of a rotating shaft for a running control lever by rotation thereof and simply and readily hold a reaping control lever at a position by decentering the above-mentioned extension shaft by a specific dimension. CONSTITUTION:An extension shaft 6 of a rotating shaft 5 for a running control lever 4 is decentered by a dimension (B) and vertically moved by rotation of the running control lever 4. A connecting rod is mounted on an arm part of a reaping control lever 7. The dimension (B) is set as follows. When the reaping control lever 7 alone is subjected to longitudinal rocking operation, the tractive direction of the connecting rod is positioned below the extension shaft 6. After operating the running control lever 4 fully forward, the reaping control lever 7 is subjected to forward moving operation and the tractive direction of the connecting rod is positioned above the extension shaft 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to an operating lever position holding device for a walk-behind mower.

This invention aims to easily and easily hold the operating levers in a machine in which a traveling drive shaft and a reaping tool are provided on the machine body, and a plurality of operating levers for operating these are attached to a handle portion protruding from the machine body. Regarding.

[Prior Art and Problems to be Solved by the Invention] A walk-behind grass mower having a travel control lever for controlling the driving force to the travel drive shaft, and a reaping control lever for controlling the driving force to the reaping tool. For safety reasons, each drive section is configured to automatically return to the power off side when the operating lever is released.

For this reason, while the operation is continuing, the driver must move and hold each control lever to the power-on side, which means that both hands are occupied, and the operation is interrupted when operating other control sections. I was forced to.

In this case, move the tips of the respective control levers closer together,
You can hold it with one hand, but the pressure of two return springs to return the control lever to the cut side is very tiring.

[Means for Solving the Problems] The present invention attempts to solve the above-mentioned problems of the conventional device, and takes the following technical measures.

That is, between the left and right support frames 2 and 3 provided at the rear ends of the left and right handle pipes 1°1, the shafts 5 and 5 of the traveling operation lever 4, which swings in the front and rear direction, are supported. , 5 as an extension shaft 6 with either one extended outward.
The reaping operation lever 7 is attached to the top so that it can swing back and forth, and the arm 8 of the reaping operation lever 7 is provided with a mounting hole 10 for connecting several connecting rods 9 such as wires or rods. When performing a back-and-forth swing operation, the pulling direction of the connecting rod 9 is located below the extension shaft 6, and when the reaping operation lever 7 is operated forward after fully operating the travel control lever 4, the pulling direction of the connecting rod 9 is A walking mower characterized in that the axis of the extension shaft 6 is eccentric with respect to the shaft 5 so that the direction is located above the extension shaft 6, and the extension shaft 6 moves downward when the travel control lever 4 moves forward. This is the configuration of the machine's operating lever position holding device.

[Effects of the Invention] With the above-described configuration, the present invention provides the following technical effects. That is, the traveling operation lever 4 can freely move back and forth around the shaft 5 between the support frames 2 and 3, and the reaping operation lever 7
is movable back and forth around one extension shaft 6 of the shaft 5 and its outer periphery as a rocking center.
Both the reaping operation lever 7 and the reaping operation lever 7 can be turned on and off independently regardless of the other party, but when the hand is released, both are turned off.Furthermore, when the travel operation lever 4 is engaged and the operation position is maintained, the shaft of the travel operation lever 4 Since the extension shaft 6 integrally extending eccentrically outward from the extension shaft 5 moves downward, when the reaping operation lever 7 is engaged and operated in this state, the pulling direction of the connecting rod 9 will move upward and forward from the axis of the extension shaft 6. Since it is pulled, the reaping change lever 7 will continue to be in the engaged state even if you release your hand from the reaping operation lever 7.

[Examples] Examples of the present invention will be described in detail below by way of example with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the component parts described in this example are not intended to limit the scope of this invention to only those, unless there is a specific description. , is merely an illustrative example.

The rotating mechanism incorporates the present invention into a part of the manually operated lever of the walk-behind mower 11.

A mowing tool (not shown) consisting of a plurality of rotating blades is provided at the lower center of the walk-behind mower 11, and its outer periphery and ceiling are covered with a machine frame 12 that also serves as a cover.

An engine 13 is mounted on the machine frame 12, and the driving force is interlocked and connected to the reaping tool via a connecting shaft (not shown) provided with a reaping latch (not shown) in the intermediate portion.

Reference numerals 17 and 18 denote front and rear axles, which are disposed at the front and rear four corners of the machine frame 12. A drive shaft is provided at either the front or rear, and a latch (not shown) runs the driving force from the engine 13 to the middle part. ) Power is interlocked and connected to the drive wheels via a transmission shaft (not shown) provided with a transmission shaft (not shown).

Left and right handle pipes 1, 1 protrude rearward and upward from the machine frame 12.

The handle pipes 1, 1 have rear end portions bent upward to connect the left and right sides, and this connection portion serves as a grip 14.

At the rear ends of the left and right handle pipes 1, 1, there are left and right support frames 2,
3 protrudes downward, and the shafts 5, 5 of the traveling operation lever 4 are swingably supported in the front-rear direction between the support holes (not shown) of the supporting frame 2.3.

A stopper 15 prevents the shaft 5 from moving laterally between the supporting frames 2 and 3.

The left shaft 5 of the travel operating lever 4 is an extended shaft 6 eccentrically extended outward, and the base of the reaping operating lever 7 is attached to the extended shaft 6 so as to be swingable back and forth.

Reference numeral 1o denotes a mounting hole, which opens in the arm 8 portion behind the base of the reaping operation lever 7, and a connecting rod 9 such as a wire or rod is mounted in this mounting hole 10.

In rotation, the connecting rod 9 is a wire type connecting rod consisting of an inner wire and an outer wire.

Reference numeral 16 denotes a receiver to which an outer wire 9a is attached, and the arm 8 of the reaping operation lever 7
The line direction of the inner wire, one end of which is tied to the mounting hole 10 opened in the front, is defined as the "pulling direction (A)" of the connecting rod 9. That is, the other end of the inner wire is connected to the reaping latch portion of the reaping tool, and a tension spring (not shown) is interposed in this connection path.

Therefore, when the "pulling direction (A) J" of the connecting rod 9 is below the extension shaft 6, a clutch cutting force in the direction of arrow A acts on the reaping operation lever 7, and the "pulling direction (A) J" of the connecting rod 9 (A)" is above the extension shaft 6, a clutch engagement holding force acts on the reaping operation lever 7 in the direction of the arrow.

When rotating, the [pulling direction (A)] of the connecting rod 9 does not change much, but the extension shaft 6 that extends integrally is offset by the dimension B with respect to the shaft 5 on which the travel control lever 4 rotates. , the extension shaft 6 is moved up and down by the rotation of the travel control lever 4.

This fluctuation is controlled so that when the travel operating lever 4 is latched off to run, the extension shaft 6 is at the highest position, and when the travel operation lever 4 is latched to run, the extension shaft 6 is set to the lowest position.

Next, the effect will be explained.

A travel control lever 4 is located near the grip 14 of the handle pipe 1.
and the position to which the reaping operation lever 7 has been moved.

This is the clutch connection position, and both the travel control lever 4 and the reaping control lever 7 can be operated independently regardless of the other party, and when the driver releases the travel control lever 4 or the reaping control lever 7, the return spring is pulled. Due to the force, both the travel control lever 4 and the reaping control lever 7 are automatically moved back in the respective clutch disengagement directions.

While keeping the travel control lever 4 in the clutch engaged state,
Then, when the reaping operation lever 7 is operated to engage the clutch,
The extension shaft 6 moves downward from the "pulling direction (A)" of the connecting rod 9, and automatically holds the reaping operation lever 7 in the clutch engagement direction.

That is, the driver does not need any force to attract the reaping operation lever 7, just the force required to attract the traveling operation lever 4 to the grip 14.

Even in this state, when the driver releases his hand from the travel control lever 4, the travel control lever 4 is automatically moved to the clutch disengaged side by the return spring, and during this movement, the extension @6 is moved to the connecting rod 9.
The moment the reaping operation lever 7 is moved in one direction from the "pulling direction (A)", the reaping operation lever 7 automatically returns to the clutch disengaged side, and no safety problem occurs.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a side view of the main parts in each clutch disengaged state, Fig. 2 is a rear view of the main parts, and Figs. 3 and 4 are explanations of the operation. Main part side view, No. 5
The figure is an overall side view. In the figure, 1 is the handle pipe, 2 and 3 are the supporting frames, 4 is the travel control lever, 5 is the shaft, 6 is the extension shaft, 7 is the reaping control lever, 8 is the arm, 9 is the connecting rod, and 10 is the mounting hole. It is.

Claims (1)

[Claims] Left and right handle pipes 1, 1 left and right support frames 2 provided at the rear end,
3, a shaft 5 of the travel control lever 4 that swings in the front and back direction;
A reaping operation lever 7 is mounted on the extension shaft 6 so as to be swingable back and forth. When opening the mounting hole 10 for attaching a connecting rod 9 such as a wire or rod to the arm 8 and operating the reaping operation lever 7 alone to swing back and forth, the pulling direction of the connecting rod 9 should be below the extension shaft 6. When the reaping operation lever 7 is operated forward after the travel control lever 4 is fully moved forward, the extension shaft 6 is moved relative to the shaft 5 so that the pulling direction of the connecting rod 9 is located above the extension shaft 6. A control lever position holding device for a walk-behind mower, characterized in that the shaft center is eccentric and the extension shaft 6 moves downward when the travel control lever 4 moves forward.