JPS6036018Y2 - brush cutter handle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bundle for a brush cutter, and more particularly to a bundle with improved attachment of a bundle grip for a brush cutter.

Brush cutters cut down weeds, shrubs, etc. using a cutting blade that rotates at high speed. A mowing blade unit consisting of a blade or a group of gears is attached to the other end, and an engine unit as a power source is attached to the other end. There are backpack-type brush cutters in which the output shaft and the power transmission shaft of the operating rod are connected by a flexible shaft.

In any case, the long operating rod accommodates a power transmission shaft that rotates at high speed along its axis, so when the operating rod rotates at high speed, considerable vibration occurs in the operating rod.

Therefore, when a worker engages in grass cutting work, he/she always grasps the operating rod either directly or indirectly, which causes vibrations to be transmitted to the hands and is not very comfortable to use.

Therefore, various improvements and innovations have been made to the grip to prevent vibrations from being transmitted to the operator as much as possible.

The present invention is an improvement and device as part of this effort, and its purpose is to prevent vibrations generated by the rotation of the power transmission shaft from propagating to the bundle grip, and in order to achieve that purpose. The bundle grip is characterized in that the support arm that is directly fixed to the operating rod and the bundle rod that is fixed to this support arm do not come into direct contact with each other.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be explained below with reference to embodiments shown in the drawings.

First, FIG. 1 is an overall side view of a brush cutter having a bundle according to the present invention. In this figure, reference numeral 1 indicates an operating lever, and at one end of this operating lever 1 there is a cutting blade having a cutting blade 2a. A unit 2 is attached to the other end, and a flexible shaft 3 is attached to the other end.
A backpack-type engine unit 3 is attached via a.

A grip 4 is attached to the middle part of the operating rod 1, and a handle 5 is attached closer to the cutting blade unit 2 than the grip 4, substantially perpendicular to the axial direction of the operating rod 1. The structure is as shown in the cross-sectional view.

That is, a support arm 54 is provided which fastens the operating rod 1 to the boss portion 51 and a boss tool 52 forming a pair with the boss portion 51 using a bolt 53. It is formed of metal into a W-shape that protrudes to draw a gentle curve on both sides of the boss portion 51.

The end portion 54a of the support arm 54 is flat in the shape of a flange, and a hole 54b is bored in the center thereof.

An end face of a pipe-shaped 7) handle rod 55, specifically an end face portion 55a having an inwardly bent flange formed on the end face, is disposed in a non-contact state orthogonal to the inner center of the end portion 54a.

This handle rod 55 has a horizontal portion 55b and a horizontal portion 55b.
The inclined portion 5 extends obliquely to both sides of b.
The three straight parts of 5c form a trapezoid, and the handle bar 5
A grip material 56 made of an elastic material is fitted on the outer periphery of the support arm 54 to form a nozzle grip 59.
There is a bridge between a.

Both ends 54a of the support arm 54 and both end surfaces 55a of the nodal rod 55 are not in direct contact with each other, and have a spacer 57a at one end, a nut 57b fixed at the other end, and an elastic material. The other end of the hollow cylindrical vibration absorbing cylinder 57 molded in is housed inside the nozzle rod 55, and the bolt 5B is screwed into the nut 57b through the hole 54b drilled in the end 54a of the support arm 54 to assemble it. A vibration absorbing space S corresponding to the spacer portion 57a is formed between the two.

When the bolt 58 passed through the hole in the vibration absorbing cylinder 57 is tightened, the middle part of the vibration absorbing cylinder 57 bulges due to the attraction of the nut 57b screwed into the bolt 58, and the bulging stopper 57c
is formed inside the end face 55a of the handle rod 55, and serves as a stopper that has the ability to prevent removal.

In addition, in FIG. 2, a dashed-dotted line symbol X indicates an axial extension line of the bolt 58.

Since the handle of the brush cutter of the present invention has the above-described configuration, in order to fix the handle 5 to the operating rod 1, the boss portion 51 of the support arm 54 and the boss tool 52 are connected with the bolt 53. Therefore, the vibration transmitted to the operating rod 1 is caused by the support arm 54.
However, the support arm 54 constituting the handle 5 and the handle bar 55 are not in contact with each other and are coupled to each other with a vibration absorption space S formed by the spacer portion 57a of the vibration absorption cylinder 57. Vibration propagation is blocked in space.

Further, a vibration absorbing cylinder 57 made of an elastic material, and particularly a spacer portion 57a, are located between the end portion 54a of the support arm 54 and the end face flange 55a of the handle rod 55, forming a vibration absorbing space S, and a vibration absorbing packing. A nut 57b is fixed to the end of the vibration absorber 57 opposite to the spacer part 57a, and by screwing an assembly bolt 58 into this nut 57b, the middle part of the vibration absorber 57c is removed. is inflated in the radial direction to form a bulging stopper 57c and used to prevent it from coming off.

As is clear from the above description, in the handle of the brush cutter of the present invention, when attaching the handle grip to the operating rod, the supporting arm is fixed to the operating rod, and the end of the handle rod is attached to the end of the supporting arm. are bolted together via a hollow cylindrical vibration absorbing cylinder, which is hollow and has a spacer part at one end, and a nut embedded in the other end to form a shape, and connects the support arm and the handle rod. Since a vibration absorbing space is provided between them by a spacer portion so that the two do not come into contact with each other, vibrations propagated to the operating rod are blocked by the vibration absorbing space, so that the needle grip does not vibrate.

[Brief explanation of the drawing]

The attached drawings show one embodiment of the handle of the brush cutter of the present invention, FIG. 1 is a side view, FIG. 2 is an enlarged sectional view taken along the line ■-■ in FIG. 1, and FIG. 3 is an enlarged sectional view along the line ■It is an enlarged sectional view along the line. 1...operation rod, 2...mower blade unit,
3...Engine unit, 4...Grip, 5...Handle, 51...Boss part, 52...Boss tool, 53... ...Bolt, 54...Support arm, 54a...End part,
54b...hole, 55...handle rod,
55a... End face part, 55b... Horizontal part, 55c... Inclined part, 56... Grip material, 57... Vibration absorbing cylinder, 57a... Spacer part, 57b... Nut, 57c...
...Bulge stopper, 58...Bolt, 59...
...Handle crib.

Claims (1)

[Scope of utility model registration request] A brush cutter is equipped with a cutting blade unit at one end and an engine unit at the other end of a hollow operating rod into which a transmission shaft is inserted, and the brush cutter performs grass cutting work by grasping a bundle provided on the operating rod.
The bundle includes a pair of support arms located on a plane perpendicular to the axial direction of the operating rod and protruding to both left and right sides of the operating rod;
A bundle grip is bridged between the ends of the support arm, and the bundle grip is formed by surrounding an elastic material around the outer periphery of a hollow bundle rod, and in particular, both ends of the bundle rod are
An end face flange formed at the end thereof and bent inward is opposed to the mounting surface at each end of the support arm with a predetermined vibration absorption space, and is perpendicular to the mounting surface from both ends of the bundle rod from the support arm side. It has a bolt that is inserted into the inside, and a vibration absorbing cylinder made of an elastic material that is fitted around the outer periphery of the bolt, and a nut that is screwed into the threaded part at the tip of the bolt at the inner end of the vibration absorbing cylinder. However, due to the radial bulge formed by the attraction of the vibration absorption tube by tightening the bolt, a bulge stopper is formed inward of the end flange of the bundle rod, and the spacer section provided at the other end of the vibration absorption tube is placed in the vibration absorption space. A bundle for a brush cutter configured such that a supporting arm and a bundle rod are connected to each other by positioning the bundle.