JPH0341984Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a handle frame for controlling the machine that is fixed to the upper part of the transmission case in walking-type mobile agricultural machines such as walking-type tillers and walking-type rice transplanters. Regarding the structure of

[Conventional technology]

One of the above-mentioned walk-behind mobile agricultural machines is a walk-behind tiller, and an example of the structure near the handle frame of this walk-behind tiller is disclosed in Japanese Utility Model Application Publication No. 57-5325.

In this structure, the handle frame fixed to the upper part of the transmission case is bent into an inverted U-shape with an open bottom and bifurcated in plan view, with notches provided at the crotches of the left and right handle frames. It is constructed of polished sheet metal. The reason why the notch is provided in the crotch portion in this manner is to allow the handle frame to be bent easily when molded into the shape described above.

A lever guide for the gear shift lever from the transmission case is fixed deep inside the crotch of the handle frame so as to cover the aforementioned notch.

[The problem that the idea aims to solve]

When fixing the above-mentioned lever guide, it is often fixed by welding. Although this welding is generally cheaper and stronger than bolting, it has the characteristic of leaving thermal stress in the welded part and making it brittle. Furthermore, when changing the orientation of the aircraft, the operating force tends to be concentrated on the crotch of the handle frame.

Therefore, if the lever guide is welded and fixed deep inside the crotch of the handle frame as described above, the strength of the crotch area will decrease, resulting in damage to the crotch area or cracks in the welded part of the lever guide. There was room for improvement as it would be easier to do.

This invention does not reduce the strength of the handle frame that is bent and molded as described above.
The purpose is to allow the lever guide to be fixed by welding.

[Means to solve the problem]

The feature of the present invention is that the above-mentioned walking type mobile agricultural machine is constructed as follows. In other words, the handle frame fixed to the upper part of the transmission case was bent into an inverted U-shape with an open bottom and bifurcated in plan view, with notches provided at the crotches of the left and right handle frames. Constructed of sheet metal, the lever guide through which the gear shift lever extends from the transmission case is welded across the opposing sides of the left and right handle frames at a position slightly rearward from the notch in the handle frame. It is fixed.

[Effect]

When constructed as described above, the lever guide 9 is welded at a position slightly rearward from the notch 7c, which is the innermost part of the crotch portion 7a of the left and right handle frames 7, 7, for example, as shown in FIG. It will be fixed.

In this way, by welding and fixing the lever guide 9 at a position away from the vicinity of the notch 7c where the operating force is concentrated, thermal stress remains in the vicinity of the notch 7c of the crotch portion 7a, reducing the strength of this area. Furthermore, there is less possibility that cracks will occur in the welded portion of the lever guide 9 due to the operating force applied to the handle frames 7, 7.

Furthermore, the opposing sides 7 of the left and right handle frames 7, 7
Since the lever guide 9 is installed and fixed across the handlebars 7b and 7b, this lever guide 9 functions as a reinforcing member, improving the strength of the left and right handle frames 7, and preventing the cut of the crotch portion 7a. Concentration of operating force near the notch 7c can be suppressed.

[Effect of idea]

As described above, the extremely simple improvement of fixing the lever guide by welding avoids the area near the notch in the crotch where operating force tends to concentrate in the handle frame, and reduces the strength of the handle frame near the crotch. We were able to suppress the occurrence of cracks. Furthermore, by using the lever guide as a reinforcing member for the left and right handle frames, it was possible to improve the strength of the entire handle frame.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 3 shows a walking-type tiller as an example of a walking-type mobile agricultural machine. As shown in FIG. 3, a transmission case 2 that transmits power to a pair of left and right wheels 1 is placed approximately in the center of the aircraft, and an engine 4 is mounted on a frame 3 that extends forward from the transmission case 2. , a belt case 5 for transmitting power from an engine 4 to a transmission case 2.

It is equipped with a chain case 6 that transmits power from the mission case 2 to the rotary tiller R connected to the rear of the machine, and handle frames 7 and 7 fixed to the upper part of the mission case 2 facing backwards.
A pair of left and right handle rods 8, 8 are attached to the.

As shown in FIGS. 1 and 2, the handle frames 7, 7 are in an inverted U-shape with an open bottom, bifurcated in plan view, and have crotches 7a of the left and right handle frames 7, 7.
It is made of a bent sheet metal with a notch 7c provided therein. The reason for providing the notch 7c in the crotch portion 7a in this way is to enable easy bending when the handle frames 7, 7 are molded into the above-described shape.

As shown in FIGS. 1 and 2, the left and right handle frames 7, 7 are located at a position slightly rearward (to the right in the paper) of the notch 7c of the crotch portion 7a of the left and right handle frames 7, 7. A lever guide 9 is welded and fixed across opposite side surfaces 7b, 7b of the lever guide 7. Shift levers 10a and 10b extending from transmission case 2 pass through lever guide 9.

[Another example]

In addition to the embodiments described above, the present invention may also be applied to a walking management machine.

[Brief explanation of the drawing]

The drawings show an embodiment of the walking-type mobile agricultural machine according to the present invention, and FIG. 1 is an exploded perspective view showing the handle frame and lever guide, FIG. 2 is a partially cutaway plan view of the handle frame and lever guide, and FIG. The figure is an overall side view of a walking-type mobile agricultural machine. 2...Mission case, 7...Handle frame,
7a...crotch part of handle frame, 7b...opposite side surface of handle frame, 7c...notch in crotch part of handle frame, 9...lever guide, 10a, 10b...shift lever.

Claims (1)

[Scope of utility model registration request] The handle frames 7, 7 fixed to the upper part of the transmission case 2 have an inverted U-shape with an open bottom and bifurcated in plan view, and a notch 7c is formed in the crotch portions 7a of the left and right handle frames 7, 7. The lever guide 9, through which the gear change levers 10a and 10b extending from the transmission case 2 pass, is made of sheet metal that is bent and bent.
At a position slightly rearward from the notch 7c of 7, the opposing side surfaces 7 of the left and right handle frames 7, 7
A walking-type mobile agricultural machine with parts b and 7b fixed by welding.