JPH0210893Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention connects a bearing body that pivotally supports a rotary blade and an engine with an outer pipe, and includes a housing part that covers a clutch and a front part of this housing part. This invention relates to a clutch housing for a brush cutter, which includes an outer cylinder part provided inside the outer cylinder part, and an inner cylinder part provided inside the outer cylinder part for holding an outer pipe.

(b) Prior art and problems to be solved Conventionally, in the clutch housing of this type of brush cutter, the outer cylinder and the inner cylinder were connected via a vibration isolator such as rubber. When a sudden load is applied to the rotary blade during work, the outer pipe swings due to the deformation of the vibration isolator, and a repetitive load in the bending direction is applied to the transmission part, causing damage to the bearing, shaft, etc. I was afraid.

(c) Means and action for solving the problem The present invention connects the outer cylinder part and the inner cylinder part through a vibration isolator, and also eliminates the vibration and movement between the outer cylinder part and the inner cylinder part. A regulating part with a gap is provided to regulate the range, and a vibration isolator is interposed in this gap. In addition to effective vibration isolation with the vibration isolator, when the outer pipe and engine swing due to the sudden load applied to the rotary blade, the gap between the vibration isolator and the This is intended to prevent damage to the transmission part by preventing metal-to-metal metal from directly contacting each other and restricting the swinging, thereby eliminating repeated loads in the bending direction that are applied to the transmission part.

(d) Embodiment Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, 1 is an outer pipe that connects the engine 7 to a bearing body 5 that rotatably supports the rotary blade 3, and 9 is a grip portion provided on a handle 13 that is fixed to the outer pipe 1. A clutch 15 is provided at one end of the crankshaft 17 of the engine 7, and is connected by centrifugal force to a clutch drum 19 provided close to the outer periphery. 21 is a bearing that pivotally supports the boss portion 23 of the clutch drum 19, and 25 is a bearing portion that supports the bearing 21. 27 is a snap spring that locks the bearing 21 to the bearing portion 25;
29 is a snap spring that locks the bearing 21 to the boss portion 23. 31 is clutch drum 19
This is a hole provided on the front side surface for attaching and removing the snap spring 27. 33 is a transmission shaft for transmitting the power of the engine 7 to the rotary blade 3, and one end is connected to the boss portion 23 by a spline 35.
is engaged in. Reference numeral 37 denotes a housing portion that covers the clutch 15, and has an outer cylindrical portion 39 formed at its front portion, and an inner cylindrical portion 41 provided inside the outer cylindrical portion 39.
Reference numeral 43 denotes a rubber vibration isolator which is filled in the space formed between the outer cylinder part 39 and the inner cylinder part 41 and is bonded by baking. Reference numeral 45 denotes a notch which is cut out in the axial direction at the end of the inner cylindrical portion 41, and 47, a bolt that crosses the notch 45 is used to tighten and fix the end of the outer pipe 1 that fits into the inner cylindrical portion 41. 49 and 51 are the inner cylinder part 4
Regulation parts 57 and 59 are formed with suitable gaps 53 and 55 between the collar parts provided on the outer periphery of the outer cylindrical part 39 and the inner diameter surface of the outer cylinder part 39, respectively. Some of them are intervening.

In the above embodiment, the power of the engine 7 is
Clutch 15, clutch drum 19, transmission shaft 33
The operator rotates the rotary blade 3 through the handles 9 and 1.
1 is held with both hands to cut grass, etc. on the ground. The vibration of the engine 7 is caused by the vibration isolator 43
Since the vibration is prevented from being transmitted from the housing part 37 to the outer pipe 1, the vibration is not transmitted to the hands of the worker who grips the grip parts 9 and 11 provided on the outer pipe. Further, for example, when a large load is applied to the rotary blade 3 and the outer pipe 1 attempts to swing greatly, the inner cylinder part 41 and the outer cylinder part 39 come into contact with each other at the regulating parts 57 and 59, causing the outer pipe 1 to swing. Since the range of movement is restricted, large swings will not occur, and since the vibration isolators are interposed in the gaps 53 and 55, metals will not come into direct contact with each other.

(e) Effect of the invention Since the present invention has the configuration as described in the claims, it is possible to effectively prevent engine vibrations from propagating to the hands of the worker, and also to reduce the vibration between the outer pipe and the engine. Damage to the transmission part can be prevented by regulating the vibration, and by interposing a vibration isolator in the gap between the regulating parts, it is possible to prevent noise and damage caused by metal-to-metal collisions. .

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented in other embodiments as well. Further, the symbols shown in the claims do not limit the technical scope of the present invention.

[Brief explanation of drawings]

FIG. 1 is a perspective explanatory view of a brush cutter equipped with a clutch housing according to the present invention, and FIG. 2 is a side sectional view of one embodiment of the present invention. 1... Outer pipe, 15... Clutch, 3
7...Housing part, 39...Outer cylinder part, 41...
Inner cylinder part, 43... Vibration isolator, 53, 55... Gap,
57, 59...Regulation Department.

Claims (1)

[Scope of utility model registration request] a housing part 37 that covers the clutch 15; an outer cylinder part 39 provided at the front part of the housing part 37;
In a brush cutter including an inner cylinder part 41 provided inside the outer cylinder part 39 and for holding the outer pipe 1, the outer cylinder part 39 and the inner cylinder part 41 are connected via a vibration isolator 43. At the same time,
Regulation parts 57 and 59 having gaps 53 and 55 for regulating the range of swing motion between the outer cylinder part 39 and the inner cylinder part 41 are provided, and a vibration isolator 43 is provided in the gaps 53 and 55. A clutch housing for a brush cutter characterized by being provided with an interposed clutch housing.