JPH019750Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field The present invention relates to a support device for a rotating part of a handle in a management machine, a tailor, etc., which allows the handle to be rotated back and forth depending on the type of agricultural work. It is.

(b) Prior art In the conventional technology, when rotating a handle back and forth on a horizontal plane, a vertical axis is set at the center of rotation, and the frame at the base of the handle is skewered on this vertical axis. , so that it could be easily rotated around this vertical axis.

(c) Problems that the invention attempts to solve However, this requires a stand to fix this vertical shaft to a solid board, and it takes a considerable amount of time to make the vertical shaft able to withstand vertical vibrations of the handle. Therefore, a large-diameter shaft must be erected.

In addition, a circular plate is placed above and below the horizontal surface of the handle base with a circular hole, and a slightly thicker disk is inserted inside the circular hole and tightened to form a rotating sliding part with a U-shaped cross section. , the horizontal surface of the handle base was used as a sliding surface for rotation.

However, in the case of a rotating device like this that is based on a horizontal surface, if the U-shaped rotating sliding part is too tightened, it will pinch the horizontal surface and will not be able to rotate, and if it is too loose, it will cause play in the top and bottom of the handle. They come out and interfere with work.

Also, if the gap between the inner diameter of the horizontal rotation hole and the outer diameter of the circular thick plate inserted is too large, the handle will play back and forth, and if the fit is too tight, friction will occur during rotation. The problem is that it is too large and difficult to rotate.

(d) Means for solving the problem The purpose of the present invention is as described above. Next, the configuration for achieving the purpose will be explained.

In a walk-behind agricultural machine in which the handle 1 can be swiveled back and forth and fixed with a handle rotation lock lever 18, a large diameter circular hole 4a for rotation is bored in the horizontal surface 4b of the handle base 4, and the height is greater than the plate thickness of the horizontal surface 4b. A plurality of small-diameter cylinders 8 are arranged inside the arc of the large-diameter round hole 4a for rotation, and the plurality of small-diameter cylinders 8 are
The outer peripheral surface of the handle frame 2 is placed in contact with the inner diameter surface of the large-diameter round hole 4a, and the lower surface plate 15 and the holding plate 10 of the handle frame 2 are arranged to sandwich the horizontal surface 4b and the small-diameter cylinder 8 from above and below, and the lower surface plate 15, a small-diameter cylinder 8, and a presser plate 10 are tightened with a fixing bolt 9 fitted in the small-diameter cylinder 8, so that the handle 1 can be rotated back and forth.

(E) Embodiment The purpose and structure of the present invention are as described above. Next, the structure of the embodiment shown in the attached drawings will be explained.

FIG. 1 is an overall side view of a management machine of the walk-behind agricultural machine with a reversible handle, FIG. 2 is a sectional side view of a handle rotation support, and FIG. 3 is a plan view.

Let me explain the configuration of the management machine. A handle base 4 is provided on the upper part of the transmission case 5, and the handle base 4
The handle frame 2 is supported so as to be rotatable back and forth. A handle 1 is fixed to a handle frame 2.

The engine 11 is mounted on an engine frame 12 that protrudes forward from the transmission case 5, and power is transmitted from the engine pulley of the engine 11 to the input pulley of the transmission case 5 via a V-belt.
The V-belt is covered with a belt cover 6.
7 is a wheel.

Depending on the type of work equipment mounted on the work equipment mounting hitch 13, the handle 1 may be placed at the rear or at the front as shown by the broken line 1'.

A handle rotation lock lever 18 is provided near the base of the handle frame 2, and if the handle rotation lock lever 18 is turned to unlock the handle frame 2 and the handle base 4, and then the handle 1 is rotated back and forth, The lower plate 15 and the holding plate 10 of the handle frame 2 rotate with respect to the handle base 4. Next, the handle rotation lock lever 18 can be tightened to fix the handle. Reference numerals 4c and 4c in FIG. 3 are engagement holes for the handle rotation lock lever 18.

As shown in FIGS. 2 and 3, the horizontal surface 4b of the handle base 4 provided on the upper surface of the mission case 5
A large diameter round hole 4a for rotation is bored in the center.

Conventionally, a circular plate whose outer diameter is close to the inner diameter of the rotating hole and thicker is inserted into the large-diameter round hole 4a for rotation, and the lower plate 15 of the handle frame 2 is applied from the upper surface, and the presser plate is placed from the lower surface. 10 and tightened with bolts to form a rotating engagement portion with a U-shaped cross section.

In contrast, in the present invention, a small-diameter cylinder 8 whose inner diameter has been opened so that the fixing bolt 9 can be inserted is arranged along the inner circumference of the large-diameter round hole 4a for rotation, and the height of the small-diameter cylinder 8 is The height is greater than the thickness of the horizontal surface 4b of the handle base, and the outer peripheral surfaces of the plurality of small diameter cylinders 8 are brought into contact with the inner diameter surface of the large diameter round hole 4a for rotation, so that the handle frame 2 can be rotated smoothly. It is configured to move.

The small diameter cylinder 8 is attached to the bottom plate 15 and the holding plate 1 by fixing bolts 9 fitted into holes inside the small diameter cylinder 8.
0, so it does not rotate like a bearing, but the part that is in contact with the inner diameter surface of the rotation hole 4a on the horizontal surface 4b is the upper and lower line part of the outer diameter of the small diameter cylinder 8. This means that the rotational friction is less than in the case of conventional contact between the outer diameter of a circular plate or donut plate and the inner diameter of the rotation hole.

14 is a wire connecting the clutch lever at the rear end of the handle and the left and right traveling clutch devices;
As the handle 1 rotates, the wire also rotates.

The height of the small-diameter cylinder 8 is preferably slightly thicker than the horizontal surface 4b of the handle base 4; if it is too thick, vertical play will occur, and if it is too thin, the handle will not rotate. Furthermore, if the gap between the outer periphery of the small diameter cylinder 8 and the inner diameter of the rotation hole is too large, backlash will occur in the front-back direction, and if they come into contact with each other, it will become difficult to rotate.

(f) Effects of the invention Since the invention is constructed as described above, the following effects can be obtained.

First, since the outer periphery of the small diameter cylinder 8 is in line contact with the inner diameter of the large diameter circular hole 4a for rotation, the handle can be rotated back and forth in a steady and smooth manner.

Second, when assembling, when creating a rotating engagement part by sandwiching a circular plate or donut plate as in the past, there was a problem that the bolt holes were difficult to match.
By interposing the cylinder as in the present invention, the cylinder can be moved freely, which eliminates the problem of difficulty in aligning the holes when inserting the bolt.

[Brief explanation of the drawing]

FIG. 1 is an overall side view of the management machine, FIG. 2 is a side sectional view of the handle rotation support, and FIG. 3 is a plan view. 1...Handle, 4...Handle base, 4a...
Large diameter round hole for rotation, 4b...horizontal surface, 8...small diameter cylinder, 9...bolt, 10...pressing plate, 15...
Bottom plate.

Claims (1)

[Scope of utility model registration request] In a walk-behind agricultural machine in which the handle 1 can be swiveled back and forth and fixed with a handle rotation lock lever 18, a large diameter circular hole 4a for rotation is bored in the horizontal surface 4b of the handle base 4, and the height is greater than the plate thickness of the horizontal surface 4b. A plurality of small-diameter cylinders 8 are arranged inside the arc of the large-diameter round hole 4a for rotation, and the plurality of small-diameter cylinders 8 are
The outer peripheral surface of the rotating large-diameter circular hole 4a is brought into contact with the inner diameter surface of the rotating large-diameter round hole 4a, and the horizontal surface 4b and the small-diameter cylinder 8 are arranged to be sandwiched from above and below by the bottom plate 15 and the presser plate 10 of the handle frame 2. Handle rotation of a walk-behind agricultural machine characterized in that a face plate 15, a small-diameter cylinder 8, and a presser plate 10 are tightened with fixing bolts 9 fitted in the small-diameter cylinder 8, and the handle 1 can be rotated back and forth. Device.