JPS62210A - Reaper - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a brush cutter that transmits engine power to a rotary blade to cut down vegetation and the like.

Conventionally, in this type of brush cutter, the pipe that connects the engine to the support that rotatably supports the rotary blade is made of metal such as iron or aluminum, The bearing tube is molded from metal such as steel alloy or synthetic resin, and in order to support the pipe and the bearing tube, short spacers made of synthetic resin are glued and fixed at appropriate positions on the bearing tube. was press-fitted into the pipe. However, with this method, the weight of the pipe increases due to its strength, and the material costs are high.

There were drawbacks such as the difficulty of manufacturing and assembling.

For this reason, in the past, radial ribs were continuously provided on the outer periphery of a synthetic resin bearing tube over the entire length in the axial direction, making it easier to manufacture by extrusion molding of synthetic resin. In some cases, the inner diameter of the pipe and the outer end of the rib are not fixed together, so the pipe is made of strong synthetic resin. Alternatively, if aluminum alloy is used and the bearing tube is made of low-strength, wear-resistant synthetic resin, the ribs will be made of low-strength synthetic resin.
It was not effective enough as a reinforcement.

Therefore, in order to maintain the necessary strength, it was necessary to increase the thickness of the material, which was insufficient in terms of weight reduction.

The present invention provides a pipe with radial ribs that are continuous and integrally formed in the axial direction inside the pipe, and a removable bearing tube that supports the rotating shaft at the center of the rib. If the bearing tube is made of strong synthetic resin or aluminum alloy, and the bearing tube is made of low-strength, wear-resistant synthetic resin, the ribs can be made of strong synthetic resin or aluminum alloy, which increases the strength and improves the material. To provide a bush cutter which can reduce the amount of damage caused by the bush cutter, can manufacture the pipe bearing pipe by extrusion molding, is easy to process and assemble, and can be manufactured at low cost. It is something. Hereinafter, one embodiment of the present invention will be described in detail using the drawings.

1 to 3, FIG. 1 is an overall view of a brush cutter 1 according to an embodiment of the present invention. 3 is a pipe for connecting the engine 5 and the support body 7, and is made of synthetic resin.

Reference numeral 9 denotes a rotary blade rotatably supported by the support body 7. Reference numeral 11 denotes a grip portion fixed to the pipe 3 to support the brush cutter 1. 13 is a throttle lever for operating a throttle valve (not shown) in the engine 5;
It is connected to the engine 5 by a wire 15. 1
7 is a handle. In Figures 2 and 3, 19,
19. ... are ribs provided radially and continuously in the axial direction inside the pipe 3, and are molded integrally with the pipe 3 from synthetic resin. Also, ribs 19, 19. A bearing tube fitting part 23 is provided at the center of the bearing tube 21, into which a bearing tube 21 molded from heat-resistant and wear-resistant synthetic resin can be inserted and removed.

25 is a rotating shaft that fits into the bearing tube 21.

In the above configuration, in order to insert the rotating shaft 25 into the pipe 3, the bearing pipe 21 is inserted into the bearing pipe fitting part 23 of the pipe 3.
, and further insert the rotating shaft 25 into the bearing tube 21.

Note that the pipes and ribs may be extruded from aluminum alloy.

4 and 5 show conventional embodiments, and 27
is a pipe made of metal such as iron or aluminum, and
9 is a bearing tube made of metal such as iron or copper alloy, or synthetic resin. A cylindrical spacer 31 made of synthetic resin or the like is fixed to the inner diameter of the pipe 27 at an appropriate position on the bearing tube 29 by a method such as gluing, and the bearing tube 29 is supported on the pipe 3 by this spacer 31. In FIGS. 4 to 5, the same reference numerals as those shown in FIGS. 1 to 3 represent the same components.

Since the present invention is configured as described in the claims,
The weight of the pipe is reduced, improving the efficiency of mowing work, and extrusion molding makes it easy to process and assemble.In addition, the pipe is made of inexpensive and strong material, and only a bearing pipe is used. Since heat-resistant and wear-resistant materials can be used, it can be manufactured at low cost.

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 the drawing]

FIG. 1 is a perspective explanatory view of one embodiment of the present invention, FIG.
The figures are a side view and a front view of the main parts, respectively, and FIGS. 4 and 5 are a side view and a front view, respectively, of the main parts of a conventional brush cutter. (Explanation of symbols representing main parts of the drawing) 3... Pipe 5... Engine 7... Support body
9...Rotary blade 19...Rib 21...
Bearing tube 25...rotating shaft

Claims (1)

[Claims] A pipe (3) is provided that connects the engine (5) with a support (7) that rotatably supports the rotary blade (9), and the power of the engine (5) is transferred to the inside of the pipe (3). A rotating shaft (25) for transmitting power to the rotating blade (9) is provided, and radial ribs (19) are integrally and continuously formed in the axial direction inside the pipe (3).
) A brush cutter characterized in that a removable bearing tube (21) for supporting the rotating shaft is provided at the center of the blade.