JPS62208212A - Lever of self-propelling working machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a self-propelled work machine for self-propelling and stopping a work machine used for lawn mowing work, sanding work, etc., and for rotating and stopping a work member. This relates to the lever.

<Prior art> The overall structure of a lawn mower among self-propelled working machines is shown in Fig. 4. A handle (1) is provided diagonally at the rear of a work machine body equipped with four wheels (10).

Below the prime mover (12) fixed on the work machine body frame is a housing (12) with a storage bag (13) at the rear.
14), inside which there is a driving shaft protruding downward from the prime mover (12), to which a working member such as a knife is attached. A control device for rotating and stopping the working member is provided between the rotating shaft and the working member. This control device is connected by a wire to an operating lever (3) which will be explained in more detail later. Furthermore, the driving shaft of the prime mover (12) and the wheels (10) are also connected via a control device, and the control device is also connected to the travel lever (4) by another wire.

In the above-mentioned self-propelled work machine, the operating lever (3)
When the travel lever (4) and the travel lever (4) are not related to each other, there is an inconvenience that each operating lever must be operated and held with both hands. In order to solve this problem, the operating lever (3) can be gripped independently of the travel lever (4).
The operating lever (3) must be grasped when the operating lever (4) is grasped (Special Publication No. 59-1466), or the operating lever (3) may be equipped with a shutter that can be rotated to move forward. (4) When you squeeze the control lever (
3) has been proposed (Japanese Patent Laid-Open No. 60-37022), in which the shutter is locked and the operating lever (3) is grasped.

<Problems to be Solved by the Invention> However, if the operating lever (3) is always gripped when the travel lever (4) is gripped as shown in the above-mentioned Japanese Patent Publication No. 59-1466, it is difficult to reap. There is also the problem of driving working members such as knives even when the machine is to be moved only, such as when storing it in a warehouse or the like, without requiring any other work.

The aforementioned Unexamined Japanese Patent Publication No. Sho Go-3702 tried to solve this problem.
In the structure of No. 2, the shutter engaging mechanism is an operating lever (3)
The cam is pivoted to the cam, the cam and the shutter are connected with a rond, the cam is rotated by the rotation of the control lever (3), and the shutter is locked to the travel lever by the rotation of the cam. It is a structure. Such a structure has the drawbacks of a complicated mechanism, easy failure, and high cost.

Means for Solving the Problems> Therefore, the present invention provides that the operating lever (3) is
), and when it is necessary to maintain the grip on the operation lever (3) with the travel lever (4), it can be rotated together. When attaching the operating lever (3) for a work member such as a cutlery and the travel lever (4) for travel control to the bracket (2) attached to the nodle (1) of a self-propelled work machine, ■ The moving shaft (5) of the lever (3) is eccentric from the rotating shaft (6) of the traveling lever (4), and the operating lever (3) is moved toward the traveling lever (
The reason is that it is pressed down in 4). Here, eccentricity refers to a state in which both rotational axes (5) and (6) are not parallel, and one is provided at an eccentric angle (α) with respect to the other.

Effect> If the rotation axis (5) of the operation lever (3) is set eccentrically from the rotation axis (6) of the travel lever (4), even if each operation lever is rotated, it will not work at the beginning of rotation. There is no relationship between the operating levers, but near the end of rotation, the travel lever (4) connects to the operating lever (3).
). In this state, both the rotation of the working member and the rotation of the traveling wheels can be controlled by gripping only the traveling lever (4). It is also possible to manually drive only the working member by gripping only the operating lever (3), or to make the working member not rotate during self-propelled movement by operating only the traveling lever (4).

<Example> Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 3 are diagrams showing the movements of the operating lever and the travel lever, with FIG. 1 being a plan view, FIG. 2 being a side view, and FIG. 3 being a front view.

As is clear from these figures, a handle (1) provided in an inclined state at the rear of the main body of one working machine is provided with brackets 9+-(2). This bracket (2)
An operating lever (3) for a work member such as a knife and a travel lever (4) for travel control are pivotally supported on the shaft. Here, in the present invention, the rotation shaft (5) of the operation lever (3) is connected to the travel lever (
4) is eccentrically offset from the rotation axis (6) by an angle (α). The situation is clear from Figure 1.

As is clear from FIGS. 1 and 3, the operating lever (3) and the travel lever (4) are independent of each other when only one of them is rotated and gripped. This makes it possible to mow the lawn while manually traveling, or to only travel when storing the vehicle. However, when the operating lever (3) is rotated to a predetermined angle, since the shaft is eccentric, it can travel and lock with A-(4). The operation lever (3) is formed with a stepped locking part (7), and the travel lever (3) is located at a position where it can be locked with the travel lever (4).
4), the travel lever (4) comes into contact with the locking portion (7) of the operating lever (3), allowing them to rotate together. This is, as shown by the two-dot chain line in the figure.
The operating lever (3) is held down by the travel lever (4) near the end of rotation of each operating lever. Work such as reaping can be performed in this self-propelled state.

<Effect of the invention> This is because the present invention has the structure as described above in detail.

In a self-propelled working machine, it is possible to operate only a working member such as a knife and to control the travel t-j using a lever separately, or to perform both simultaneously using only the travel lever. Because such functions were made possible by a simple mechanism, there were almost no failures and the cost was reduced.

[Brief explanation of drawings]

1 to 3 are diagrams showing the movements of the operating lever and the travel lever, with FIG. 1 being a plan view, FIG. 2 being a side view, and FIG. 3 being a front view. FIG. 4 is a perspective view showing an example of application to a lawn mower. (1) Handle (2) Bracket (3) Operation lever (4) Travel lever (5) (6) times! !
lj axis (7) Above the locking part

Claims (1)

[Claims] 1. When attaching the operation lever (3) for a work member such as a knife and the travel lever (4) for travel control to the bracket (2) attached to the handle (1) of the self-propelled work machine,
The rotation shaft (5) of the operation lever (3) is eccentric from the rotation axis (6) of the travel lever (4), and the operation lever (3) is moved toward the travel lever (4) near the end of rotation of each operation lever. ) A lever for a self-propelled work machine characterized by being pressed down by a lever.