JPH025711Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mounting structure for an operating rod, anti-vibration grip, etc. in a brush cutter.

That is, in a brush cutter configured with an operating rod extending from a bearing part inside a detachable clutch housing on the engine side, a vibration-proof grip and a cushioning rubber are fitted to the operating rod, and a drive shaft is installed inside. By integrating the anti-vibration grip and the cushioning rubber, the anti-vibration grip can be easily attached to the operating rod, and the grip of the anti-vibration grip can be stabilized, making it possible to create a mounting structure with good operability and a compact structure. To provide a simple structure that can be easily manufactured and assembled, and can be easily implemented in a clutch housing by easily assembling an operating rod into a clutch housing with an anti-vibration grip fitted. It is something.

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

FIG. 1 shows a perspective view of the brush cutter, in which an operating rod 5 housing a drive shaft 4 extends from the engine E side, and a mounting bracket 9 is connected to the intermediate portion of the operating rod 5 to connect the handle rod 10. A disc blade 12 is pivotally attached to the lower part of a gear case 11 which is connected to the tip of the operating rod 5, and is constructed in the same manner as the conventional structure.

Reference numeral 1 designates a clutch housing, which is removably connected to the engine E side by inserting a bolt into a mounting hole 13 on the outer peripheral side of the end thereof, and a cylindrical bearing portion 2 is provided at the inner center of the clutch housing 1. are integrally formed, and a cylindrical portion 1 is provided on the outer side of the clutch housing 1.
A is integrally formed to extend, and a spline-shaped uneven portion 7 is formed on the inner peripheral surface from the middle in the longitudinal direction to the inner end side of the cylindrical portion 1a, and from the middle to the opening 1a' of the cylindrical portion 1a. is formed in the sliding hole, and the bearing portion 2
A snap spring 8 is installed on the outer peripheral surface of the end of the operating rod 5, which can be slidably fitted into the shaft, and a snap spring 8 is fitted on the inner peripheral surface of the bearing section 2.
A boss 1 is fixed to the center of the clutch drum 15, which forms a stepped portion 14 that can be engaged with, and is located inside the clutch housing 1 and can be freely engaged with the engine E side.
One end of the drive shaft 4 is inserted into and fixed to the drive shaft 6 , and a bearing 18 that is fitted into the boss 16 and locked by a snap spring 17 is installed so that it can be fitted into the bearing portion 2 . A collar 19 is installed between the end face of the bearing 18 and the bearing 18, and a snap spring 20 that can be engaged with the bearing 18 is installed at the end of the bearing 2. do.

Reference numeral 3a designates a cylindrical anti-vibration grip, one end of which is integrally formed with a cylindrical shock-absorbing rubber 3b, and the entire grip is molded from a rubber material. A cylindrical metal 21 of
A bulge 22 formed on the other end side of the anti-vibration grip 3a
The uneven portion 7 is formed in series so that b is the same as the outer diameter of the buffer rubber 3b, and the outer periphery of the buffer rubber 3b is slightly longer than half of the axial length of the cylinder portion 1a.
A spline-shaped concavo-convex portion 6 that can be fitted by sliding in the axial direction is formed, and the buffer rubber 3b is separated from one end of the operating rod 5 by a little distance.
b and the inner peripheral surface on the side of the bulge 22a are fitted onto the operating rod 5 and fixed together with adhesive or the like, and the bulge 2
A throttle wire 25 is inserted through a notch 23 formed on the inner peripheral side of the grip 2a and a hole 24 formed on the other end side of the anti-vibration grip 3a.

In addition, in the figure, 26 is a needle bearing.

Therefore, as shown in FIG.
When a part of the operating rod 5 is inserted into the sliding hole in the cylindrical portion 1a and the uneven portions 6 and 7 are fully fitted, one end of the operating rod 5 protrudes outward from the inner side of the bearing portion 2. Then, a snap spring 8 is fitted to the outer periphery of one end of the protruding operating rod 5 as shown in the figure.
When the clutch housing 1 is pulled in the direction shown by arrow A from this state, the snap ring 8 engages with the stepped portion 14, and the cushioning rubber portion 3b is inserted into the cylindrical portion 1a as shown in FIGS. 2 and 4. While inserted, the constantly engaged portions of the concave and convex portions 6 and 7 are in a state of engagement, and the collar 19 is brought into contact with the end face of the operating rod 5, and the bearing 18 that is fitted and locked in the boss 16 is inserted into the bearing. When the snap spring 20 is fitted into the inner end of the bearing part 2 and inserted into the end of the bearing part 2 from the outside, the clutch housing 1 can be assembled as shown in FIGS. 2 to 4. It can be assembled by connecting it to the E side.

When assembled in this way, the anti-vibration grip 3a does not loosen in the circumferential direction due to the engagement of the uneven parts 6 and 7, and stable gripping operation is possible. As a result, the anti-vibration grip 3a can be held in an anti-vibration state.

In this way, the present invention provides an arrangement in which the operating lever 5 is connected to the bearing part 2 in the clutch housing 1, which is detachably attached to the engine E side.
In a brush cutter configured by extending the operating rod 5, a vibration-proof grip 3a and a cushioning rubber 3b are fitted to the operating rod 5, and a drive shaft 4 is installed inside.
a and a buffer rubber 3b are integrally molded and fitted and fixed to the operating rod 5, and a spline-shaped uneven portion 6 is formed on the outer periphery of the buffer rubber 3b.
Partway inward from the opening 1a' of the longer extending cylindrical portion 1a is a sliding hole into which the end of the anti-vibration grip 3a can be inserted. A spline-shaped uneven portion 7 that fits into the uneven portion 6 is formed, and a locking portion that can be engaged with the bearing portion 2 is formed on the end side of the operating rod 5 that slidably fits into the bearing portion 2. Since the anti-vibration grip 3a and the shock-absorbing rubber 3b can be integrally attached to the operating rod 5, the anti-vibration grip 3a and the shock-absorbing rubber 3b can be easily attached to the operating rod 5. The grip 3a can be gripped stably to provide a mounting structure with good operability, and the structure can be made compact.
With the cushioning rubber 3b fitted to the cushioning rubber 3a,
b and the end of the anti-vibration grip 3a are slid into the inside of the cylindrical portion 1a, and the operating rod 5 is deeply inserted into the bearing portion 2, while the snap ring 8 can be easily engaged, thereby facilitating assembly. It will be possible to
It has a simple structure that is easy to manufacture and assemble, and can be suitably implemented.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of a brush cutter, FIG. 2 is a side sectional view of a part of the brush cutter, FIG. 3 is a sectional view taken along the line - in FIG. 2, and FIG. A sectional view taken along the line - in FIG. 3, and FIG. 5 a diagram illustrating the operation. E...Engine, 1...Clutch housing,
2...bearing part, 3a...vibration-proof grip, 3b...
Buffer rubber, 4... Drive shaft, 5... Operating rod, 6, 7
...Uneven part, 8...Snat spring.

Claims (1)

[Scope of utility model registration request] An operating rod 5 is provided extending from the bearing portion 2 in the clutch housing 1 which is detachable on the engine E side.
In a brush cutter constructed by fitting an anti-vibration grip 3a and a shock absorbing rubber 3b to the handle and incorporating a drive shaft 4 therein, the anti-vibration grip 3a and the shock absorber 3b are integrally molded and are fitted and secured to the operating rod 5. and buffer rubber 3
A spline-shaped uneven portion 6 is formed on the outer periphery of b.
A sliding hole is formed halfway inward from the opening 1a' of the cylindrical portion 1a, which extends longer than the clutch housing 1, into which the end of the anti-vibration grip 3a can be inserted, and the inner periphery that is inward from this sliding hole is formed. A spline-shaped uneven portion 7 that fits into the uneven portion 6 is formed on the surface portion,
the operating rod 5 which is slidably fitted into the bearing portion 2;
A mounting structure for an operating rod, a vibration-proof grip, etc., characterized in that a locking snap ring 8 that can be engaged with a bearing part 2 is fitted on the end side of the handle.