JPS6010357Y2 - portable brush cutter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a portable brush cutter for mowing grass and the like by rotating a cutting blade using the power of an engine.

Conventionally, in this type of portable brush cutter, the transmission shaft that transmits the power of the engine and the rotating shaft that rotates the cutting blade are installed in directions that are inclined to each other, so the rotating shaft is rotatably supported. In the connecting case, power was transmitted using a bevel gear between the transmission shaft and the rotating shaft.

Therefore, the structure is complicated and cannot be manufactured at low cost.

In addition, due to differences in the height of workers when exporting to a foreign country, or differences in the length of the outer pipe depending on the purpose of the work, it is necessary to manufacture products with different inclination angles between the outer pipe and the rotating shaft. In this case, not only the connecting case but also the expensive bevel gear are different, so there is also the disadvantage that the inventory price of these parts increases.

The present invention connects the transmission shaft and the rotation shaft with a universal joint, which simplifies the structure, makes it easy to process, and makes it inexpensive. The present invention aims to provide a brush cutter that can be manufactured easily, with only the connecting case being different and other parts being the same, making it easier to manage the parts.

Embodiments of the present invention will be described in detail below with reference to the drawings.

In the figure, 1 is an outer pipe that supports an engine 3 at one end and a cutting blade 7 via a connecting case 5 at the other end, and 9 and 11 are a handle and a grip for supporting the outer pipe 1, respectively. It is.

Reference numeral 13 denotes a transmission shaft which penetrates the inside of the outer pipe 1 and is rotatably supported by the connection case 5 via a bearing 15, and is rotated by the drive of the engine 3.

Reference numeral 17 denotes a rotating shaft that is inclined in the direction of the transmission shaft 13 and the axis line, and is rotatably provided in the connection case 5 by bearings 19, 19, and a support that fits into the spline 21 provided at the other end. Insert the cutting blade 5 between the nut 2 and the washer 23.
It is fixed by 7.

29 is a bearing holder fixed to the end of the connection case 5 by bolts 31 and 31; 33 is a bearing holder that holds the outer pipe 1 which fits into the fitting hole 35 provided at the end of the connection case 5 through the notch groove 37; This is a bolt that is tightened and fixed.

Reference numerals 39 and 41 are universal joints whose one end is fixed to the transmission shaft 13 and the rotating shaft 17 by bolts 43 and 45, respectively, and are connected to each other by a connecting body 51 having fork portions 47 and 49 at both ends.

Since the structure and function of the universal joints 39 and 41 are the same as those commonly used, a detailed explanation will be omitted here.

In the above configuration, the power of the engine 3 is transmitted to the transmission shaft 13
The cutting blade 7 is rotated through the universal joints 39 and 41° rotation shaft 17, and the handle 9 and grip portion 11 of the outer pipe 1 are gripped to cut grass and the like.

Since the present invention has the configuration as described in the claims, it has a simple structure, is easy to process, and can be manufactured at low cost, and it can also be manufactured with different inclination angles between the rotating shaft and the transmission shaft. In this case, only the connecting cases can be different, while other parts can be made common, which facilitates parts management.

Although two universal joints are used in this embodiment, one universal joint may be used depending on the inclination angle of the transmission shaft and the rotating shaft.

[Brief explanation of the drawing]

FIG. 1 is a perspective explanatory view of an embodiment of the present invention, and FIG. 2 is a side cross-sectional explanatory view of the main parts. Explanation of the symbols representing the main parts of the drawing, 1...
Outer pipe, 3...Engine, 5...
...Connection case, 7...Mower blade, 13...
・Transmission shaft, 17... Rotating shaft, 39, 41...
...Flexible joint.

Claims (1)

[Scope of utility model registration request] A connecting case 5 that rotatably supports a rotary shaft 17 to which a cutting blade 7 is fixed is provided at one end, and a portable mowing machine that performs mowing work by gripping an outer pipe 1 that connects the connecting case 5 and the engine 3. In the brush cutter, the outer pipe 1
The transmission shaft 13 passing through the outer pipe 1 is rotatably supported by the connection case 5, and the transmission shaft 13 and the rotation shaft 17 are connected to each other. , in the connection case 5, a universal joint 39
, 41, and the connecting case 5, which has different inclination angles in the direction of the axis of the outer pipe 1 and the rotating shaft 17, can be freely replaced and assembled. Portable brush cutter.