JPS6028181Y2 - Brush cutter with anti-vibration handle - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a brush cutter with an anti-vibration bundle.

That is, in a brush cutter constructed by installing a cutting blade on the tip side of a pipe-made operating rod extending from the engine side, if the structure is as seen in the prior art, Japanese Utility Model Application No. 52-159933. If the vibration absorbing member fitted between the attachment part of the bundle rod and the main rod is tightened by the attachment part, it will be compressed and the vibration isolation effect will be greatly reduced. If the vibration-absorbing member is loosely fitted to the bundle rod, the vibration-absorbing member will deform significantly and move relative to the main rod side when the bundle rod is swung from side to side, resulting in poor bundle operability. The structure is as follows.

The present invention solves these drawbacks, and can effectively reduce the transmission of vibrations from the engine or cutting blade side to the operator via the operating rod and bundle, and also improves the operability of the bundle. To provide a simple structure that allows light cutting work to be carried out with a simple structure and that can be carried out suitably.

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

FIG. 1 shows a perspective view of the entire brush cutter, in which a waist rest 5 equipped with a hanging metal fitting 6 for hooking a hanging band is fitted on the base side of a pipe-made operating rod 1 that extends long from the engine 4 side. A cutting blade 2 driven by a transmission shaft 18 within the operating rod 1 is installed on the tip side of the operating rod 1 with a safety cover 3 interposed therebetween, and is constructed in the same manner as the conventional structure.

Reference numeral 10 indicates the entire fixture, in which a lower body 10a and a middle body 10b, each having a semicircular inner peripheral surface, are joined together and tightened with each bolt/nut 11, and an upper body 10c is joined above the middle body 10b. It is constructed by tightening each bolt 12, and the central part of the bundle rod 7, which has grips 8, 8 attached to both ends, is sandwiched and fixed between the upper body 10c and the middle body 10b, and the middle body 10b and A cylindrical elastic body 9 is fitted and fixed inside the lower body 10a, and the large diameter portions 9a, 9a at both ends engage outwardly at both ends of the middle body 10b and the lower body 10a. It is constructed by being fitted onto the operating rod 1 while maintaining a minute gap C.

Reference numeral 13 denotes an annular support body, which is fitted to the operating rod 1 so as to engage with one end surface of the elastic body 9, and has symmetrical rings formed at both ends of the split support body 13. The support body 13 is fixed to the operating rod 1 by inserting a bolt 17 into both ends 13a, 13a and tightening a nut 17a at its tip.A washer 14 is interposed between the ends 13a, 13a. Configure.

Further, both end portions 13a, 13a have both elongated leaf springs 1 on their outer surfaces.
5 and 15 are brought together, and the port 17 is inserted and connected and fixed, and the other ends of both leaf springs 15 and 15, which extend parallel to each other in the direction of the operating rod 1, are connected to the lower body 10a. Both leaf springs 1 are fitted with ports 16 that are inserted into shaft holes 19 formed in the lower part of the lower body 10a on both sides of the lower part.
5 and 15, and is tightened and fixed.

Further, as another example, if a minute gap is provided between the cylindrical elastic body 9 and the supporting body 13 installed next to it, a structure can be obtained in which this minute gap can be expected to have the effect of absorbing vibrations in the axial direction. .

Therefore, the operator can perform brush cutting work with the cutting blade 2 by swinging the operating rod 1 while holding and operating the grips 8, 8 with both hands.

In this state, vibrations generated from the engine 4 or the cutting blade 2 side are transmitted to the operating rod 1, but vibrations in the diametrical direction of the operating rod 1 are prevented from being transmitted due to the small gap C between it and the elastic body 9. , or the bundle rod 7 is cushioned by the elastic body 9.
Since the elastic body 9 is connected to the support 13, the vibration in the axial direction of the operating rod 1 is prevented from being transmitted to the bundle rod 7 side, and the vibration in the axial direction of the operating rod 1 is reduced. Vibrations in the circumferential direction, that is, in the torsional direction, are absorbed by the leaf springs 15, 15 between the fixture 10 and the support body 13, so that vibrations in all directions are effectively absorbed.

In addition, if only the vibration-proofing properties of the elastic body 9 are strengthened, the bundle rod 7
However, this problem can be solved by connecting the fixture 10 and the support 13 with plate springs 15, 15, and the operation of the bundle rod 7 is improved, allowing the operator to work longer. Even during time-consuming cutting work, the work can be carried out safely with less fatigue, and occupational diseases such as white wax caused by vibrations can be prevented.

As described above, the present invention is a brush cutter in which a cutting blade is attached to the tip side of a pipe operating rod extending from the engine side, and the cylindrical elastic body attached to the bundle rod attachment tool is installed in a small gap. A support body adjacent to the elastic body is fitted and fixed to the operating lever, and the supporting body and the fixture are provided with both ends of a leaf spring extending to the operating lever. Since the two sides are connected and fixed, vibrations in the diametrical direction of the operating rod are suppressed by a small gap between the operating rod and the elastic body, and vibrations in the axial direction are suppressed by the structure in which the elastic body and the support body are adjacent to each other. The vibrations of the bundle rods are buffered by the leaf springs, effectively absorbing vibrations in all directions, and reducing the transmission of vibrations to the bundle rod side, making the bundle rod extremely easy to operate, making it light and safe. It has the advantage of being able to carry out grass cutting work and having a simple structure that allows it to be carried out suitably.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of the entire brush cutter, Fig. 2 is a side view of the main parts, Fig. 3 is a sectional view thereof, and Fig. 4 is taken along I-I in Fig. 3. FIG. 4...Engine, 1...Operation rod, 2.
...Mowing blade, 7...Bundle rod, 10...
...Mounting tool, 9...Elastic body, C...
・Minute gap, 13...Support, 15...
- Leaf spring.

Claims (1)

[Scope of utility model registration request] In a brush cutter configured by installing a cutting blade on the tip side of a pipe operation rod extending from the engine side, the cylindrical elastic body attached to the handle rod mount is used to maintain a minute gap for the operation. A support body that is fitted onto a rod and adjacent to the elastic body is fitted and fixed to the operating rod, and both ends of a plate spring that extends to the operating rod are connected and fixed to the support body and the fixture. A brush cutter with a vibration-proof bundle, characterized in that the brush cutter is configured with a vibration-proof bundle.