JPH046508Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a handle rotation adjustment device for a brush cutter that allows the angle of the handle to be easily adjusted during work according to the working posture.

[Conventional technology]

Conventionally, a mowing machine is constructed by connecting a handle rod in a direction perpendicular to the operating pole, which has grips at both ends, through a holder, in the middle of a long operating pole that has an engine and a cutting blade connected to each other through a holder. The hair removal machine does not have a structure that allows the holder to be easily rotated and fixed relative to the operating handle, and also allows the holder to absorb vibrations.

[Problem that the invention attempts to solve]

Therefore, during work, it is not possible to quickly and easily rotate the handle rod according to the working conditions, and adjustment requires time and effort, and frequent and fine adjustments cannot be easily made. It had a number of problems.

[Means for solving problems]

The present invention solves this problem and has a simple structure that does not cause vibrations to the handle.Therefore, a stopper is provided that locks the holder connected to the handle rod to the operating rod only in the axial direction. A part of the annular stopper, which can be inserted and fitted and tightened or loosened by the operation lever using a screw rod with a knob, is fitted into a part of the holder, and the inner peripheral surface of the holder and the stopper are connected to each other. Annular elastic members are interposed between the outer circumferential surfaces and engage with each other in the rotating direction.

[Effect]

Therefore, vibrations can be absorbed by the elastic material between the stopper and the holder, and by rotating the knob, the tightening of the stopper is released and the handle rod is rotated laterally to adjust to the working posture. The desired angle can be quickly and easily adjusted, and the knob can be simply tightened and locked quickly and easily.

〔Example〕

Next, the embodiment shown in the drawings will be described.

FIG. 2 shows a side view of the brush cutter. The rear end of a long operating shaft 2 with a transmission shaft 10 inside is fitted into the clutch case 9 of the engine E to connect the operating shaft near the clutch case 9. A gear case 1 is fitted with a grip 11 and connected to the tip of the operating handle 2.
The cutting blade 1 is rotatably mounted on a shaft below the cutting blade 2, and is constructed in the same manner as the conventional structure.

Reference numeral 4 denotes a holder, and the lower part of the holder 4 into which the operating rod 2 is inserted has a hole 14a having a cylindrical inner circumferential surface, and a complicated protrusion 13 parallel to the inner circumferential surface in the axial direction. Holes 14b are formed in the front and rear, respectively, and in the horizontal groove 15 formed in the upper part of the holder 4, a central part of the handle rod 3 is bent upward and has grips 3a, 3a at both ends. At the same time, a joint 4a is fitted above the joint 4a and secured by tightening with each bolt 16.

Reference numeral 7 designates an annular stopper, and a split groove 17 is formed on the side of the stopper 7 that can be fitted into the operating member 2 from the middle to one end, and a small diameter outer peripheral surface formed from the middle of the split groove 17 to the other end. A plurality of protrusions 18 are formed parallel to the axial direction, and a hole 19 and a screw hole 19a are formed in the upper and lower parts of the split groove 17 on the one end side.
, and a small diameter threaded portion 6a formed at the lower part of the threaded rod 6 having the knob 5 at the upper end is inserted into the hole 1.
9 and screw hole 19a.

The annular elastic member 8 fitted between the hole 14b and the stopper 7 has a plurality of grooves 20 and 21 formed in parallel to the axial direction on the outer and inner circumferential surfaces thereof, respectively.

Further, 7a is a stopper, and the stopper 7a is a stopper.
However, the stopper 7a is provided with a tightening screw 22 so that it can be inserted therein, and the outer periphery of the elastic member 8a, which is formed in the same manner as the elastic member 8, is formed as a mere circular surface.

Although not shown, a ring body for the stopper is fixedly provided adjacent to the engine side of the stopper 7 to prevent it from moving toward the engine side when the holder 4 rotates.

Therefore, when assembled as shown in FIGS. 1 to 5, the holder 4 is prevented from moving in the axial direction by the stopper 7a fixed to the operating rod 2 by the tightening screw 22. However, the elastic material 8a
Since it can slide against the stopper 7a side,
Free to rotate. In addition, the operation plate 2 side and the holder 4
Since both elastic members 8, 8a are interposed between the two, vibrations generated in the operating stick 2 are absorbed by the elastic members 8, 8a, and the handle rod 3 side becomes vibration-proof.

Also, the stopper 7 and the holder 4 are made of elastic material 8.
Since the stopper 7 is tightened to the operating rod 2 by the rotation of the threaded rod 6, the handle rod 3 can be locked, and the handle angle of the handle rod 3 can be adjusted. In this case, grip the knob 5 and rotate the screw rod 6.
This means that the stopper 7 can be loosened, and if the handle rod 3 is rotated around the axis of the operating rod 2, it can be rotated as shown by the imaginary line in FIG. 3, as desired. In this position, it can be locked by rotating and tightening the screw rod 6.

[Effect of idea]

In this way, the present invention allows you to hold the knob 5 and tighten the screw rod 6.
By rotating , the stopper 7 can be loosened and the handle rod 3 can be rotated around the axis of the operating rod 2, so that the desired handle angle can be quickly and easily adjusted according to the working posture even during work. Furthermore, since the stopper 7 and the holder 4 are engaged in the rotational direction and the elastic material 8 is interposed between them, it is possible to ensure good vibration isolation along with the rod, and the structure is simple. It has the feature that it can be carried out suitably.

[Brief explanation of the drawing]

Figure 1 is a rear view of the main parts of an embodiment of the present invention;
Figure 2 is a side view of the brush cutter, Figure 3 is the − of Figure 2.
4 is a sectional view taken along the - line in FIG. 1, FIG. 5 is a sectional view taken along the - line in FIG. 4, FIG. 6 is an exploded view of a part of FIG. 4, and FIG. , FIG. 8, FIG. 9, and FIG. 10 respectively show cross-sectional views taken along lines -, -, -, and - in FIG. E...Engine, 1...Mower blade, 2...Operation staff,
3a...Grip, 3...Handle rod, 4...Holder, 5...Knob, 6...Screw rod, 7, 7a...
...Stopper, 8...Elastic material.

Claims (1)

[Scope of utility model registration request] A handle rod 3 having grips 3a on both ends and extending in a direction perpendicular to the operating rod 2 is connected via a holder 4 to a midway portion of a long operating rod 2 to which an engine E and a cutting blade 1 are connected for transmission. In the brush cutter, the holder 4 to which the handle rod 3 is connected is fitted to the operating rod 2 with a stopper 7a interposed therebetween for locking only in the axial direction, and a threaded rod 6 with a knob 5 is inserted. A part of the annular stopper 7, which can be tightened or loosened by the operating member 2, is fitted into a part of the holder 4, and the holder 4
A handle rotation adjustment device characterized in that an annular elastic member 8 is interposed between the inner peripheral surface of the stopper 7 and the outer peripheral surface of the stopper 7 to engage with each other in the rotation direction.