JP2552486Y2 - Anti-vibration ring handle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an annular handle used for portable equipment for agriculture, forestry, and horticulture such as a brush cutter.

[0002]

2. Description of the Related Art Conventionally, an annular handle of this type is provided with the structure shown in FIG.
There is no vibration isolator for preventing vibration of the engine or the rotary blade as shown in Fig. 2 and the engine is installed in another place away from the annular handle, such as between the support pipe that supports the annular handle and the engine. There was provided an anti-vibration body for preventing the vibration of the device. That is, a metal pipe such as aluminum is fixed to a synthetic resin fixing member 7 with a fixing cover 3 and bolts 5 at a lower joint portion of the grip portion 1 which is curved in an annular shape, and the fixing tool 7 is fixed to the fixing cover 9. And was fixed to the support pipe 11 by the bolt 5 described above. The bolt 5 penetrates the fixing lid 3 and the fixing tool 7 and is screwed to a nut 13 embedded in the fixing lid 9. That is, this ring-shaped handle was not provided with a vibration isolator such as rubber.

[0003]

Problems to be Solved by the Invention Conventional vibration isolators are insufficient in vibration damping, and especially when the engine and the cutting blade are separated from each other like a brush cutter, vibration is prevented from the cutting blade. Was not provided.

[0004]

The present invention provides an annular handle comprising a semi-annular grip portion 31 and a support portion 37 supporting both ends of the grip portion 31 and fixing the center to the support pipe 23. While both ends of the grip portion 31 and both ends of the support portion 37 are respectively connected via a vibration isolator 39,
A regulating portion 57 for regulating the relative movement between the grip portion 31 and the support portion 37 within a predetermined range is provided.
With respect to the outer periphery of the engagement cylinder 47 engaged with the vibration isolator 39 at both ends of the support portion 37, both ends of the grip portion 31 are separated by a predetermined gap 5.
5, and is formed to extend so as to surround the outer peripheral portion of the engagement cylinder 47.

[0005]

[Function] The vibration of the engine, the cutting blade, etc. is transmitted to the worker's hand holding the annular handle through the support pipe during the work.
Vibrated by the vibration insulator. Although the annular handle tends to swing greatly by the vibration isolator, the movement is restricted to a predetermined range by the restricting portion, so that the work is not hindered by the swing of the annular handle.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

1 and 2, the brush cutter 15 is constructed as follows. That is, a grip 25 is fitted to a support pipe 23 that connects the bearing body 19 that rotatably supports the cutting blade 17 and the engine 21, and an annular handle 27 is fixed in front of the grip 25.

The annular handle 27 is formed as follows. That is, a fixed portion 35 having a semi-annular grip portion 31 and a concave portion 33 whose central portion is engaged with the support pipe 23.
And a separate support portion 37 that supports both ends of the grip portion 31 at both ends is connected via a rubber vibration isolator 39. The vibration isolator 39 has a washer 41 baked and fixed to one end of the cylindrical shape, and is fixed to an end face of the grip portion 31 by a screw 43. The other end of the vibration isolator 39 is a groove 45 formed on the outer periphery.
Are engaged with a projection 49 provided in the circumferential direction in an engagement cylinder 47 formed at the end of the support portion 37. A lid 53 is detachably fitted over the inner diameter hole 51 of the vibration isolator 39.

On the end face of the grip portion 31, a cylindrical restricting portion 57 which fits with the outer periphery of the engaging cylinder 47 through a predetermined gap portion 55 and regulates the movement range is provided on the outer periphery of the engaging cylinder 47 (see FIG. Support part 37
Is formed so as to surround the entire periphery (excluding the arm side portion). The fixing part 35 includes a fixing lid 59, a bolt 6
1 fixed to the support pipe 23. That is, the bolt 61 passes through the fixing portion 35 and is screwed to the nut 63 embedded in the fixing lid 59.

The operator holds the grip 25 and the grip portion 31 of the annular handle 27 with both hands, and uses the cutting blade 17 rotated by the driving of the engine 21 to mow grass and the like on the ground.

The vibration of the engine 21 and the like transmitted from the support pipe 23 to the support 37 is damped by the vibration isolator 39 and does not reach the hand of the operator holding the grip 31. If the grip portion 31 attempts to swing largely due to the load applied during the work, the engagement cylinder 47 and the regulating portion 57 come into contact with each other, and the swing is regulated.

[0012]

According to the present invention, it is possible to prevent both the vibration of the working device such as the engine and the cutting blade from being transmitted to the operator's hand, and the vibration of the engine is usually generated between the engine and the connecting pipe. Since the vibration isolator of the present invention is provided in series in addition to the provided vibration isolator, the vibration isolation effect is further improved. Further, it is possible to eliminate the obstacle of the work that the load due to the work is applied to the annular handle and swings largely.

[Brief description of the drawings]

FIG. 1 is a perspective view of a bush cutter having an annular handle according to the present invention.

2 (a) is a front view, and FIG. 2 (b) is an embodiment of the present invention.
FIG. 2C is a side view, and FIG. 2C is a side view in the direction of the line CC in FIG.

FIG. 3 shows a conventional example, in which (a) is a front sectional view,
(B) is a bottom view and (c) is a side sectional view.

[Explanation of symbols]

 23 support pipe 31 gripping part 37 supporting part 39 vibration isolator 57 regulating part

Claims (1)

(57) [Scope of request for utility model registration] 1. A semi-annular grip portion 31 and the grip portion 31
And a support portion 37 that supports both ends of the support pipe 23 and fixes the center to the support pipe 23.
1 and both ends of the support portion 37
And a restricting portion 57 for restricting the relative movement between the grip portion 31 and the support portion 37 to a predetermined range.
The regulating portion 57 is provided at both ends of the support portion 37.
With respect to the outer periphery of the engagement cylinder 47 engaged with the vibration isolator 39, both ends of the grip portion 31 have predetermined gaps 55
A vibration-proof annular handle, which is formed to extend so as to surround an outer peripheral portion of the handle.