JPS6211741Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is based on the bearing member fixed to the fuselage side.
The present invention relates to a walk-behind working machine in which the handle is configured to be able to change its rotational direction around a vertical axis with respect to the machine body by inserting and fitting a vertical shaft member connected to the handle.

Conventionally, as described in the above-mentioned walking type work machine, for example, as described in Japanese Utility Model Application Publication No. 54-162604, a mounting member provided to cover the upper end of the transmission case is positioned protruding from the upper surface. It is known that a bearing member is provided in series, and a shaft member that is provided in series on the handle side is fitted into the bearing member, but according to such a walk-behind work machine, the bearing member protrudes above the transmission case. This has the disadvantage that the handle is mounted at a higher position and the overall size of the aircraft increases.

Such walk-behind work machines are usually provided with a connection part between the clutch side part of the operation system for the steering clutch linked to the left and right wheels, and the handle side part, and this connection part is connected to the handle mounting position. If it is provided above, there is a problem that it becomes even larger.

Therefore, by providing only the above-mentioned connecting portion at a position halfway between the rotation axis of the handle and the free end side of the handle, the vertical height of the machine body is reduced by the amount of the connecting portion.
Although it is conceivable to reduce the size of the steering wheel, a new problem arises in that the rotating shaft cylinder of the handle and the connecting portion are separated by a large distance, which complicates the linkage structure from the connecting portion to the steering clutch.

In view of the above points, it is an object of the present invention to improve the mounting configuration of the handle and the connecting portion, and to make the entire aircraft body more compact.

Next, embodiments of the present invention will be described in detail with reference to the drawings.

A transmission case 2 and a rotary case 3, on which wheels 1 and 1 are mounted on the left and right sides, are connected to the upper and lower first and second
The handle 6 is connected via the connecting members 4 and 5, and the handle 6 is attached to the first connecting member 4 as an example of a mounting member so as to be freely rotatable and fixed around the vertical axis P.
A walk-behind cultivator is configured as an example of a walk-behind working machine.

A cylindrical member 7 as an example of a bearing member is inserted into the first connecting member 4 between the two cases 2 and 3, and the cylindrical member 7 is provided with a handle side rotating member as an example of a shaft member. Lower side cylindrical part 8a of member 8
It is fitted inside so that it can only be rotated freely. Three engagement holes 9 are formed in the horizontal surface portion of the first connecting member 4 on the front and rear sides of the vertical rotation axis P, and on the other hand, the handle-side rotation member 8 is provided with the engagement holes 9. Matching hole 9...
A lock pin 10 that selectively engages is provided so as to be vertically slidable, and a compression spring 11 is attached to the lock pin 10 to constantly bias it toward the engagement side.
An operating tool 12 provided near the grip portion of the handle 6 and the lock pin 10 are connected via a wire 13, and by operating the operating tool 12 and rotating the handle 6, the direction of rotation of the handle 6 can be changed to the front or back of the aircraft. It is configured to allow fixed operation.

The handle 6 is pivotally connected to the handle side rotating member 8 so as to be able to swing up and down about the horizontal axis _P1 , and the handle ₆ has a diameter centered on the horizontal axis P1. Along with providing the arc-shaped guide plates 14,
Three engagement holes 15 are formed in the guide plate 14 at predetermined intervals in the vertical direction, and on the other hand handle 6 side, a lock pin 16 is selectively engaged with the engagement holes 15. is provided so as to be able to slide freely while always being biased by a spring 17 so as to be displaced toward the engagement side, and an operating tool 18 installed in parallel with the operating tool 12 and the lock pin 16 are connected to the grip portion of the handle 6 by a wire. 19, and by operating the operating tool 18 and vertically swinging the handle 6, the height of the handle 6 can be adjusted according to the physique or the type of work such as furrow tillage or over-furrow tillage. It is configured so that it can be adjusted as appropriate.

The steering clutches 20a, 20b attached to the wheels 1, 1 are connected to the steering clutches 20a, 20b attached to the wheels 1, 1, respectively, while the handle-side rotating member 8 is positioned in the space S formed between the handle 6 and the first connecting member 4. First and second release wires 21 of the clutch side part of the operation system
a, 21b and the third and fourth release wires 22a, 22b of the handle side portion.
In order to be able to operate the left and right steering clutches 20a and 20b with the same feeling regardless of the rotation direction of the
Left and right steering operation tools 24a and 24b are provided on the left and right handle portions in conjunction with changing the rotation direction of the handle 6.
and a linkage switching mechanism 25 that automatically and contradictoryly switches the linkage state between the left and right steering clutches 20a and 20b.
It is equipped with the following details.

That is, as shown in FIG. 4, a push-pull rod 27 is slidably provided across the opposing pieces 26, 26 protruding from the handle-side rotating member 8, and the left-right opposing pieces 26 are attached to the push-pull rod 27. , 26, the first to fourth rotary bodies 28a, 28b, 2 are connected to the first to fourth release wires 21a, 21b, 22a, 22b, respectively.
9a and 29b loosely, and the rod 27 and the first
or fourth rotating body 28a, 28b, 29a, 29
b, the four collars 30 are externally fitted onto the rod 27 so as to be positioned in the axial direction and only rotate freely, and the key 3 is fitted onto the two collars 30.
1 and 31 are attached, and as the rod 27 slides, the third and fourth rotating bodies 29a and 29b can alternatively and contrarily rotate together with the first and second rotating bodies 28a and 28b, respectively. Connected and left/right steering operation tool 2
4a, 24b and left and right steering clutches 20a, 20b
It is configured to switch the state of association with the Vertical cam pieces 32, 3 are provided at both ends of the rod 27, respectively.
2, and on the other hand, an annular cam plate 33 is connected eccentrically to the cylindrical member 7, and as the handle 6 rotates, the cam plate 33 moves the cam pieces 32, 32.
The rod 27 is configured to automatically slide when pressed.

The rear part of the second connecting member 5 extends rearward, and a rotary case 3 is attached to the lower front end of the extending part 5a.
The rotary frame 34 is pivotally connected to the rotary frame 34 so as to be swingable and detachable by co-tightening, and the long hole 35 bored in the front end of the rotary frame 34 allows the rotary frame 34 to swing within a predetermined range. However, the mounting angle of the rotary frame 34 can be changed in accordance with the change in the pin connection position with respect to the rear end of the extending portion 5a. A rear cover 36 for the tilling device 3a is attached to the rotary frame 34, and a pair of front and rear mounting portions 37, 37 on the lower sides of the second connecting member 5 and the rotary case 3 are used to attach the front cover to the tilling device 3a. A cover 38 is attached to the rear cover 36 in a continuous manner.

In the middle of the rotary frame 34 in the longitudinal direction,
A mounting bracket 40 for work equipment such as a ridge erector, etc., whose fixing position can be adjusted freely by tightening bolts 44, 44 in the front and rear directions through long holes 39, 39 bored along the longitudinal direction in the opposing pieces 34a, 34a, respectively. The mounting angle can also be changed by attaching the metal fitting 40 and tightening a nut 43 to a bolt 42 passed through an arc-shaped elongated hole 41 formed in the metal fitting 40.

In summary, the walk-behind cultivator according to the present invention is
A mounting member 4 for fixing the bearing member 7 to the side of the transmission case 2 off the upper end of the aircraft body is provided to extend laterally from the upper end side of the transmission case 2, and the bearing member 7 is attached to the mounting member 4. The steering clutch 20a of the mission case 2 is provided in a space S formed between the upper surface of the mounting member 4 and the handle 6 side member, and is arranged in a protruding position below the lower surface of the member 4. , 20b, the clutch side parts 21a, 21b and the handle side part 22 of the operation system.
It is characterized in that it is provided with a connecting part 23 with the parts a and 22b.

In other words, the mounting member 4 extending laterally from the mission case 2 is positioned so as to protrude below the lower surface of the mounting member 4, and is connected to the handle 6 side on the lateral side away from the upper end of the mission case 2. Since the bearing member 7 is fixed to the fixed shaft member 8a, the mounting position of the handle 6 can be lowered compared to the conventional case.

Moreover, by effectively utilizing the space S formed between the upper surface of the mounting member 4 and the handle 6 side member when the handle 6 is attached, an operating system for the steering clutches 20a and 20b is installed in this space S. Since the connecting portion 23 of the steering clutch 20 is provided, the steering clutch 20
a, 20b and the connecting portion 23 are placed as close as possible to each other, without complicating their linkage structure, and without providing anything above the handle 6, making it possible to make the entire machine body compact.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the walking type work machine according to the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a partially cutaway side view of the main part, and Fig. 3 is a partially cutaway plan view of the main part. Fourth
The figures are a cross-sectional view taken along the line -- in FIG. 3, FIG. 5 is a partially cutaway side view of the rotary frame portion, and FIG. 6 is a cross-sectional view taken along the line -- in FIG. 1...Wheel, 2...Mission case, 4...
Mounting member, 7...Bearing member, 8a...Shaft member, 6
...Handle, 20a, 20b...Steering clutch, 21a, 21b...Clutch side part, 22
a, 22b...Handle side portion, 23...Connection portion, 25...Switching mechanism, P...Handle rotation vertical axis, S...Space.

Claims (1)

[Claims for Utility Model Registration] By inserting the vertical shaft member 8a connected to the handle 6 side into the bearing member 7 fixed on the machine body side, the handle 6 is aligned vertically with respect to the machine body. In a walk-behind work machine that is configured to be able to change the direction of rotation around a center P, the mounting member 4 that fixes the bearing member 7 to the side of the machine body away from the upper end of the transmission case 2 is attached to the side of the transmission case 2. Extending laterally from the upper end of 2,
The bearing member 7 is arranged in a protruding position below the lower surface of the mounting member 4, and the transmission case is arranged in a space S formed between the upper surface of the mounting member 4 and the handle 6 side member. A walking type work machine characterized in that a connecting part 23 is provided between the clutch side parts 21a, 21b and the handle side parts 22a, 22b of the operation system for the two steering clutches 20a, 20b. The left and right clutch side portions 21a, 21b are attached to the connecting portion 23 as the handle 6 rotates.
The walking type work machine according to claim 1, which is a registered utility model, characterized in that it is provided with a switching mechanism 25 for switching the state of connection between the left and right handle side portions 22a and 22b in a contradictory manner.