JPS6010355Y2 - Installation structure of long handle tube in brush cutter - Google Patents

Description

[Detailed description of the invention] This invention has an engine attached to the proximal end via a clutch housing and a cutter attached to the distal end via a gear housing, and a driven shaft is passed through the long handle tube. In a type of brush cutter in which the cutter is rotated, it is necessary to prevent vibrations from being transmitted to the long live pipe from the clutch housing and the connecting pipe section integrally constructed therewith, and to improve the length of the connecting pipe section. This invention relates to a mounting structure for a long live pipe in a brush cutter that has been developed for the mounting force of a long live pipe.

Conventionally, when attaching a long live pipe to a connecting pipe portion of a clutch housing, the base of the long live pipe was inserted into the inside of the connecting pipe portion.

However, since a grip is usually attached to the base of a long live tube, the grip is attached to the front of the connecting tube (note: the cutter is placed in front of the engine in one direction). ), the balance when holding the grip is poor, i.e. the engine side is heavier than the cutter side, so it is preferable to install the grip as close to the engine side as possible. As mentioned above, the connecting pipe section was a hindrance, making it difficult to install it in a well-balanced location.

In addition, in the case where a long live pipe is inserted inside the connecting pipe section, vibrations from the engine are transmitted to the long live pipe through the connecting pipe section, and therefore vibrations are also transmitted to the grip. Therefore, it is necessary to make the grip itself anti-vibration structure, or to incorporate a vibration-proof material between the grip and the long live tube, and furthermore, heat from the clutch housing is easily transmitted. In view of these points, the conventional method was not preferable.

The present invention was developed by focusing on the points mentioned above, and its purpose is to fit the base of a long live tube to the outside of the connecting tube of the clutch housing, so that it can be gripped in the direction of the engine as much as possible. To provide a mounting structure for a long live pipe in a brush cutter, which can be mounted close to each other, has good balance when gripped, and has excellent workability.

Other objects of the present invention are that a vibration-proof rubber body is inserted between the tip of the outer peripheral side of the main body of the clutch housing and a clamp fitting for crassoping a long live pipe; An annular groove is formed at two locations at the front and back on the outer periphery of the connecting pipe, and a vibration-proof rubber ring is fitted into the annular groove, and the outer periphery of the ring is made to protrude beyond the outer periphery of the connecting pipe. A long live tube is fitted to the outside of the two protruding anti-vibration rubber rings, and the annular flange formed at the base end of the long live tube is fitted into the groove on the front surface of the anti-vibration rubber body. To provide a mounting structure for a long live pipe in a brush cutter, which achieves extremely good vibration isolation and heat insulation.

Another object of the present invention is to form a plurality of flanges on the outer peripheral side of the main body of the clutch housing, fit the recesses of the vibration-proof rubber body into these flanges, and By fitting the recessed part of the clamp fitting into the plurality of protrusions formed on the outside, the long live pipe can be securely attached to the clutch housing, and therefore the bush cutter does not rotate. To provide a mounting structure for a long live pipe in a.

Furthermore, another object of the present invention is to form the vibration isolating rubber body and the clamp fitting into two halves, thereby making it easier to assemble the long blade of the brush cutter. It is in providing the pipe mounting structure.

Next, an embodiment of the present invention that can achieve the above objectives is as follows.
The attached drawings will be explained in detail.

Figures 1 to 8 are exploded views, Figure 1 is a front view of the clutch housing, Figure 2 is a sectional view taken along the line ■-■, Figure 3 is a front view of the anti-vibration rubber ring, and Figure 4 is a long A vertical cross-sectional side view of a part of the active tube, FIG. 5 is an inside side view of the vibration-proof rubber body, FIG. 6 is a front view of the same as above, FIG. 7 is a rear view of the same as above, and FIG. 8 is an inside side view of the clamp fitting. , FIG. 9 shows a rear view of the same as above, and FIG. 10 shows a longitudinal sectional side view of the assembled state.

Reference numeral 1 denotes a clutch housing consisting of a main body part 11 and a connecting pipe part 12. The main body part 11 has an engine mounting hole 11a formed at its base, and a plurality of flanges 11b formed at its distal end.

An annular groove 12a is formed at two locations on the outer circumferential side of the connecting pipe part 12, at the front and rear, and the vibration-proof rubber ring 2 is fitted into this annular groove 12a, and the outer circumferential side thereof is formed from the outer circumference of the connecting pipe part 12. It is prominent.

3 indicates a long active tube, and an annular collar portion 31 is formed at the base end thereof.

4 shows a vibration-proof rubber body made in the shape of two parts, each of which has a mostly circular groove part 41 for the main body part 11 of the clutch housing 1.
A small semicircular groove 42 for the connecting pipe portion 12 and a plurality of recesses 43 formed between the semicircular groove 41 and the small semicircular groove 42.
and a convex portion 44 formed on the outside of a plurality of concave portions 43.

In addition, the annular collar 3 of the long live tube 1 is provided on the front surface of the small semicircular groove 42.
1 groove 45 is formed.

Reference numeral 5 indicates a clamp fitting made in two halves, which includes a main body part 51 having a concave part 51a for the convex part 44 of the vibration isolating rubber body 4, and a half part for the long live pipe 3 having a screw hole 52a. Circular tube part 52
It is composed of

In FIG. 10, 6 is a clutch drum, 7 is a driven long shaft fixed to the clutch drum 6, 8 is a ball bearing, and 9 is a screw.

Then, the collar 11b of the main body portion 11 of the clutch housing 1
The concave portions 43 of the two vibration isolating rubber bodies 4 are fitted into the two, and the elongated live tube 3 is fitted onto the outside of the vibration isolating rubber ring 2 fitted into the connecting pipe portion 12. The annular collar portion 31 is fitted into the groove 45 of the vibration isolating rubber body 4, and the concave portion 51 of the main body portion 51 of the two clamp fittings 5 is fitted into the convex portion 44 of the vibration isolating rubber body 4.
In the fitted state, the screws 9 are tightened in the screw holes 52a.

Therefore, the present invention has the following effects.

(a) By fitting the long live pipe 3 to the outside of the connecting pipe part 12 of the clutch housing 1, the grip can be installed as close to the engine as possible, so when gripping the grip, the balance is good and work is easy. Easy to do.

(b) A long live tube 3 is attached to the outside of the two vibration-proof rubber rings 2 which are fitted onto the outer periphery of the connecting tube portion 12 of the clutch housing 1 so that the outer periphery thereof protrudes beyond the outer periphery of the connecting tube portion 12.
As a result, the vibration of the connecting pipe section 12 connected to the main body section 11 of the clutch housing 1 is reduced by the vibration isolating rubber ring 2.
It is not transmitted to the long live pipe 3 by the connection pipe part 1.
Since a gap is formed between the outer periphery of 2 and the inner periphery of the long active tube 3, the heat of the connecting pipe portion 12 is not transferred to the long active tube 3.

(C) The clamp fitting 5 that is fitted onto the outer periphery of the long live tube 3 with the screw 9 is interposed between the vibration isolating rubber body 4 and the main body 11 of the clutch housing 1, so that the main body 11
The vibration is not transmitted to the clamp fitting 5, and therefore, together with the anti-vibration rubber ring 2 of (b) above, the transmission of vibration from the clutch housing 1 to the long disease 3 is reliably prevented, and the vibration of the grip is also prevented. You can work comfortably without any problems.

(d) The anti-vibration rubber body 4 does not rotate relative to the main body 11 because the plurality of flanges 11b of the main body 11 of the clutch housing 1 are fitted into the plurality of recesses 43, respectively.

Since the plurality of convex portions 44 provided on the outer periphery of the non-rotating vibration isolating rubber body 4 are fitted into the plurality of concave portions 51a of the clamp fitting 5, the clamp fitting 5 is attached to the vibration isolating rubber body 4. There is no rotation.

Therefore, the elongated active tube 3 into which the non-rotatable clamp fitting 5 is fitted with the screw 9 does not rotate with respect to the clutch housing 1, so the grip also does not rotate, resulting in good workability.

(e) Since the vibration isolating rubber body 4 and the two clamp fittings 5 are formed in an open manner, assembly work is easy.

[Brief explanation of drawings]

The drawings show one embodiment of the mounting structure for a long live pipe in a brush cutter according to the present invention. Figure 1 is a front view of the clutch housing, Figure 2 is a sectional view taken along the line ■-■, and Figure 3. Figure 4 is a front view of the anti-vibration rubber ring, Figure 4 is a vertical side view of a part of the long live tube, Figure 5 is a front view of the anti-vibration rubber ring,
The figure is an inside side view of the vibration isolating rubber body, Figure 6 is a front view of the same as above, Figure 7 is a back view of same as above, Figure 8 is an inside side view of the clamp fitting, Figure 9 is a rear view of same as above, and Figure 10 is FIG. 3 is a vertical side view in an assembled state. 1...Clutch housing, 11...
Main body part, 11b...Brim, 12...Connecting pipe part, 12a...Annular groove, 2...Vibration isolating rubber ring, 3... ...Long live tube, 31...
...Annular flange, 4...Vibration-proof rubber body, 43...
...Concave portion, 44...Convex portion, 45...
Groove, 5... Clamp fitting, 51a...
Recessed part, 9...Screw.

Claims (1)

[Scope of utility model registration request] A plurality of flanges 11b are formed on the main body part 11 of the clutch housing 1, and a connecting pipe part 1 is connected to the main body part 11.
Anti-vibration rubber rings 2 are fitted into the annular grooves 12a bored in two places at the front and back of the ring 2, with the outer periphery of the ring protruding from the outer periphery of the connecting pipe part 12, and the collar 11b has a two-part structure. The elongated live tube 3 is fitted to the outside of the vibration isolating rubber ring 2, and the annular collar 31 formed at the base end is fitted into the recess 43 of the vibration isolating rubber body 4. Groove 4 on the front side of
5, the recessed part 51a of the clamp fitting 5 formed in two halves is fitted to the plurality of convex parts 44 of the vibration isolating rubber body 4, and the bush cutter is tightened with the screw 9. Installation structure for long live pipes.