JPH0631420U - Anti-vibration ring handle - Google Patents

Abstract

(57) [Abstract] [Purpose] Vibration is prevented from propagating to the hand of the work that grips the annular handle, and the vibration-proof handle swings greatly due to the work load. prevent. [Structure] An anti-vibration body 39 is provided between a grip portion 31 of an annular handle and a support portion 37 that supports both ends of the grip portion 31, and a restriction portion 57 that restricts relative motion within a predetermined range.
To provide.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an annular handle used for portable equipment for agriculture, forestry, and horticulture such as brush cutters.

[0002]

[Prior art]

 Conventionally, this type of annular handle is not provided with a vibration isolator for preventing vibration of the engine or rotary blade as shown in FIG. At other locations apart from the annular handle, a vibration isolator was installed to prevent engine vibration. That is, a metal pipe such as an aluminum tube is fixed to a synthetic resin fixture 7 with a fixing lid 3 and a bolt 5 at a lower joint portion of a grip portion 1 which is curved in an annular shape. It was fixed to the support pipe 11 by the above-mentioned bolt 5 through 9. The bolt 5 penetrates the fixed lid 3 and the fixture 7, and is screwed into a nut 13 embedded in the fixed 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 device]

 The conventional anti-vibration body does not provide sufficient anti-vibration, and there is no anti-vibration body provided to prevent vibration from the cutting blade, especially when the engine and the cutting blade are separated from each other, such as a brush cutter.

[0004]

[Means for Solving the Problems]

 In the present invention, by providing a vibration isolator on the annular handle, both vibrations due to the rotation of the engine and the cutting blade are damped together, and the vibrations damped by the existing vibration isolator are further damped. This is to improve the anti-vibration effect, and to prevent the ring-shaped handle from significantly shaking due to the attachment of the anti-vibration body to facilitate the operation.

[0005]

[Action]

 The vibration of the engine, cutting blade, etc., during the work is transmitted to the hand of the operator who holds the annular handle through the support pipe, but is isolated by the vibration isolator. The vibration-proof body tries to swing the annular handle largely, but since the movement is regulated within a predetermined range by the regulating portion, the swinging of the annular handle does not hinder the work.

[0006]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

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

The annular handle 27 is formed as follows. That is, a semi-annular grip portion 31 and a fixing portion 35 having a concave surface portion 33 for engaging the support pipe 23 at the center portion, and a separate support portion 37 for supporting both ends of the grip portion 31 at both ends, respectively. Are coupled via a rubber vibration isolator 39. The vibration isolator 39 has a washer 41 baked and fixed to one end of a cylindrical shape, and is fixed to the end surface of the grip 31 by a screw 43. A groove 45 formed on the outer circumference of the other end of the vibration isolator 39 is 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 to cover the inner diameter hole 51 of the vibration isolator 39.

On the end surface of the grip portion 31, a cylindrical restricting portion 57 is formed that is loosely fitted to the outer periphery of the engaging cylinder 47 via a predetermined gap 55 to restrict the range of motion. The fixed portion 35 is fixed to the support pipe 23 by a fixed lid 59 and bolts 61. That is, the bolt 61 penetrates the fixing portion 35 and is screwed into the nut 63 embedded in the fixing lid 59.

The operator grips the grip 25 and the grip 31 of the annular handle 27 with both hands, and cuts off grass on the ground with the cutting blade 17 that is rotated by the drive of the engine 21.

The vibration of the engine 21 and the like transmitted from the support pipe 23 to the support body 37 is isolated by the vibration isolator 39 and does not reach the hand of the operator who holds the grip portion 31. When the grip portion 31 tries to swing greatly due to the load applied during the work, the engagement cylinder 47 and the regulating portion 57 come into contact with each other to regulate the swing.

[0012]

[Effect of device]

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

[Brief description of drawings]

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

2 is an embodiment of the present invention, (a) is a front view, (b)
Is a side view, and (c) is a side view taken along the line C-C of FIG. 1.

FIG. 3 shows a conventional example, (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 Restricting Part

Claims (1)

[Scope of utility model registration request] 1. A semi-annular grip portion 31, and the grip portion 31.
Of the grip portion 3 in the annular handle composed of the support portion 37 that supports both ends of the
1 and both ends of the support portion 37 are respectively provided with a vibration isolator 39.
And a restriction part 57 for restricting relative movement between the grip part 31 and the support part 37 within a predetermined range.
Anti-vibration annular handle characterized by having a.