JPH0262203B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides an engine and a working device such as a brush cutting device, a blower, a snow removal device, etc. by means of a connecting rod passing through a transmission shaft inside. This relates to a portable working machine that is connected to the portable working machine.

(Prior art and problems to be solved) Conventionally, in this type of portable work machine, the handle for gripping the work machine is attached to a connecting rod, and the engine is located at the side and rear of the worker. It had the disadvantages of being long and heavy, making it difficult to operate. Furthermore, in portable working machines, there is a risk of hands touching the hot parts of the engine, and dust such as grass particles adheres to the engine, making cleaning difficult. For this reason, some models house the engine in a main body case, but this main case is formed by covering both sides of an annular central case with both sides open, and the rear handle is integrated into this central case. The rear end of the connecting rod is fastened to the front part with a screw or a tightening band that crosses the notch groove cut out in the axial direction of the cylindrical part of the front part of the main body case. Ta. In this case, there are three molds for molding, and the structure of the mold for the main body case is complicated, resulting in high manufacturing costs.

[Structure of the invention]

(Means and Effects for Solving the Problems) The present invention provides a main body case that accommodates all accessory devices such as an engine and a fuel tank, and integrates a rear handle and a front handle into the rear and front parts of the main case, respectively. The length of the connecting rod can be shortened by fixing it to the rear handle, making the structure simple and light in weight, making it easier to operate. Divide along the vertical plane including the line, and divide the rear end of the connecting rod into
It is clamped and fixed at this split surface, making it easy to assemble the connecting rod.
It can be easily constructed as an individual.

(Example) Hereinafter, one example of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 to 4, an engine (not shown) and a working device 7 are connected by a connecting rod 3 passing through a transmission shaft 1 inside. The working device 7 is a brush cutting device in this embodiment, and is provided with a bearing body 11 that rotatably supports the rotary blade 9. The engine is housed in a main body case 13 together with accessory devices such as a fuel tank, and is divided into left and right cases 15 and 17 by a vertical plane that includes the centerline of the transmission shaft 1. A rear handle 19 is fixed to the rear of the main body case 13. That is, the left and right split handles 21 and 23, which are divided into the rear parts of the left and right cases 15 and 17 and fixed to each other, are integrally joined by screws 25 and 27 to form the rear handle 19. ing. At the front of the main body case 13, the rear end of the connecting rod 3 is located on the left side in the dividing plane.
It is held and fixed by the right cases 15 and 17. Further, on the outer periphery of the front part of the main body case 13, a front handle 31, which is pivotally attached by a shaft 29 so as to be swingable in the front and back direction, is attached to a bolt 3 in an appropriate swing position.
It is fixed by 3. The base of the shaft 29 is embedded integrally with the main body case 13 when it is molded from synthetic resin. FIG. 5 shows another embodiment,
An annular front handle 35 surrounding the front part of the main body case 13 is fixed to the main body case 13 with screws 37. This front handle 35 may be formed in the shape of a square ring.

In the embodiments described above, the operator grasps the front handle 31 and the rear handle 19 with both hands and performs work using the work device 7 which is rotated by the engine. That is, in this embodiment, the rotary blade 9 is used to cut grass, etc. on the ground. The overall length of the working machine can be made shorter compared to the conventional structure in which the grip part provided on the connecting rod is held with both hands.

〔Effect of the invention〕

According to the present invention, the following effects are achieved.

(a) Since the engine and accessory equipment are housed within the main body case, the operator does not have to touch the hot parts of the engine, and it is easy to clean any grass particles etc. that may have adhered to the engine.

(b) Since a rear handle is provided at the rear end, the overall length is short and the weight is light, making it easier to operate.

(c) Since the front handle and the rear handle are fixed to the main body case, the structure is simple and easy to manufacture.

(d) Since the connecting rod is clamped and fixed by the split surface of the main body case, it can be easily fixed without requiring any special fixing tools.

(e) Since the main case is divided vertically, there are two sets of molds, which reduces manufacturing costs.

Further, if the front handle is provided so as to be swingable in the front-rear direction, the load distribution of the weight applied to both hands can be appropriately changed, making the work easier. Alternatively, if the front handle is provided so as to surround the entire front part of the main body case, the front handle can be easily gripped even when the working machine is used with the working machine tilted from side to side.

[Brief explanation of the drawing]

FIG. 1 is a perspective explanatory view of one embodiment of the present invention, and FIG.
3 are a side sectional view and a plan sectional view of the main part, FIG. 4 is a front sectional view of another main part, and FIG. 5 is a front sectional view of another embodiment. 1... Transmission shaft, 3... Connection rod, 7... Working device, 13
...Body case, 19...Rear handle, 31...Front handle, 35...Front handle.

Claims (1)

[Scope of Claims] 1. In a portable working machine in which an engine and a working device 7 are connected by a connecting rod 3 passing through a transmission shaft 1 therein, a main body case 13 covering the engine and ancillary devices is provided. A rear handle 19 is integrally fixed to the rear, and the main body case 13 and the rear handle 19 are divided along a vertical plane including the axis of the engine, and the rear end of the connecting rod 3 is A portable working machine characterized in that the main body case 13 is clamped and fixed to the dividing surface of the front part of the main body case 13, and a front handle 31 is fixed and fixed to the front part of the main body case 13. 2. The portable working machine according to claim 1, wherein the handle 31 is pivotally mounted so as to be swingable in the front-back direction and fixed at an appropriate swinging position. 3. The portable working machine according to claim 1, wherein the front handle 35 is fixed to the entire front circumference of the main body case 13.