JPH0349986Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention has a transmission case installed at the rear lower part of the engine, and a control handle that can be turned back and forth by turning around a vertical axis fulcrum. Regarding walk-behind tillers.

[Conventional technology]

Conventionally, in such walk-behind cultivators, the vertical axis fulcrum of the control handle, which can freely change its direction forward and backward, is provided in the upper part of the transmission case.

[Problem that the invention attempts to solve]

However, as mentioned above, if the vertical axis fulcrum of the control handle is provided at the top of the mission case, the pivot base of the control handle will protrude above the transmission case, so when operating in an orchard, for example, the base of the control handle will There was a risk that it might get caught in the lower branches of fruit trees.

By the way, it is possible to attach the vertical axis fulcrum of the operation handle to the rear of the mission case so that the base of the operation handle does not protrude above the transmission case, but it is possible to connect the working device at the bottom of the rear of the transmission case. Since the base of the operating handle is located above the hitch, it is difficult to insert and remove the hitch pin easily, making it difficult to put it into practical use. The present invention was developed in view of the above-mentioned circumstances, and its purpose is to allow the vertical axis fulcrum of the operating handle to be located at a lower position while making it easy to insert and remove the hitch pin. At the point.

[Means for solving problems]

The characteristic configuration of the present invention includes the configurations described in [A] to [C] below.

[A] A hitch for attaching a working device and a support stand for the operating handle are provided at the rear of the mission case, with the support stand positioned above the hitch.

[B] The support base is provided with a vertical axis fulcrum of the operating handle at a position away from the rear end of the mission case, and between the vertical axis fulcrum and the mission case, and An upwardly open space is formed at the upper part of the hitch.

[C] The hitch pin insertion hole of the hitch is provided so as to face the above-mentioned upwardly open space, so that the hitch pin can be inserted and removed from the upper side of the operating handle.

[Effect]

According to the above configuration, the pivot base of the operating handle can be arranged at the rear of the mission case with little or no protrusion above the mission case, and the hit pin can be easily inserted and removed from above. Moreover, the handle load can be directly transmitted to the hitch without going through the transmission case.

[Effect of idea]

Therefore, according to the present invention, it is possible to suppress as much as possible the base of the control handle from getting caught on branches, etc. when working in an orchard, and it is also possible to easily attach and detach the working device by inserting and removing the hitch pin. I can do it.

Also, when moving the working equipment attached to the hitch vertically or horizontally while applying a ground load, the handle load can be directly transmitted to the working equipment, compared to a case where the operating handle is directly attached to the mission case. This reduces the load on the transmission case, which is advantageous in terms of strength in models where the transmission case is made of sheet metal.

〔Example〕

As shown in Fig. 4, an engine E is mounted on the fuselage frame 1, and a vertically elongated sheet metal transmission case M is provided at the rear lower part of the engine E. The transmission case M is provided to support the wheels 2, 2.
A hitch 3 for connecting a working device to which the rotary tiller A is attached and a control handle 4 are provided at the rear of the rotary tiller, thereby forming a walk-behind tiller.

In addition, to explain the rotary tilling device A in detail, as shown in FIG. Nut 7 to screw together,
A case protection plate 8 is welded and fixed to the nut 7 to prevent stones lifted by the tilling claw 9 from getting stuck between the nut 7 and the tilling claw 9 and being locked in rotation.

The operating handle 4 is attached to the upper part of the hitch 3 so as to be able to freely change its direction back and forth by turning around the vertical axis fulcrum X. The mounting structure of the operating handle 4 will be described in detail below.

As shown in FIGS. 1 and 2, the mission case M consists of left and right divided cases 11, 11.
A bracket 12 having a U-shape in plan view, to which the hitch 3 is welded and fixed, is attached and fixed to the flange portion 11a of the bracket 12 via a spacer 13 by tightening a plurality of bolts 14 . A handle support base 15 is provided at the top of the hitch 3, the front and rear width of which increases toward the top, and an upwardly open space S is formed between the support base 15 and the back surface of the bracket 12. A chrysanthemum seat 16 is provided rearwardly in the state, and the pair of left and right base ends 4a, 4a of the operating handle 4 are attached to the chrysanthemum seat 17 that engages with the chrysanthemum seat 16 fixed to the upper part of the support base 15. The operating handle 4 is attached through a pair of left and right chrysanthemum seats 18 and 19, and is rotated by rotating the first operating handle 20 that penetrates through the upper and lower pair of chrysanthemum seats 16 and 17.
can be rotated around the vertical axis fulcrum X to freely change the direction back and forth, and two sets of chrysanthemum seats 18 on the left and right,
By rotating a second operating handle 21 penetrating through the second operating handle 19, the operating handle 4 is swung around a horizontal axis fulcrum Y, thereby making it possible to freely change the vertical angle of the operating handle 4. Further, the hitch pin 22 is inserted into the space S between the vertical axis fulcrum X and the mission case M so that the hitch pin 22, which is inserted and removed vertically for changing the working device, can be easily inserted and removed from above. A hole K is formed across the support base 15 and the hitch 3.

[Brief explanation of the drawing]

The drawings show an embodiment of the walk-behind cultivator according to the present invention, in which Fig. 1 is an exploded perspective view showing the mounting structure of the operating handle, Fig. 2 is a plan view showing the mounting part of the operating handle, and Fig. 3 is a rotary cultivator. A plan view of the lower part of the case, and FIG. 4 is an overall side view of the walking cultivator. 3...Hitsuchi, 4...Control handle, 15...
Handle support base, 22... hitch pin, E... engine, K... insertion hole, M... transmission case, S... space, X... vertical axis fulcrum.

Claims (1)

[Claims for Utility Model Registration] A transmission case M is provided at the rear lower part of the engine E, and a control handle 4 is provided so that its direction can be freely changed back and forth by turning around a vertical axis fulcrum X, and the following [A] A walk-behind cultivator having the configuration described in ~[C]. [B] At the rear position of the mission case M,
The support stand 15 connects the hitch 3 for attaching the work equipment and the support stand 15 of the operating handle 4 to the hitch 3.
It is located above the. [B] The support stand 5 is provided with a vertical axis fulcrum X of the operation handle 4 at a position away from the rear end of the mission case M, and the vertical axis fulcrum X and the mission case M are connected to each other. Between the
In addition, an upwardly open space S is formed at the upper part of the hitch 3. [C] The insertion hole K of the hitch pin 22 of the hitch 3 is provided so as to face the above-mentioned upwardly open space S, so that the hitch pin 22 can be inserted and removed from the upper side of the operating handle 4.