JPH018098Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a brush cutter in which a support for supporting a rotary blade and an engine are connected through an outer pipe.

Conventionally, in this type of brush cutter, as shown in Fig. 3, a rotating shaft rotatably supported by a support body is rotated by a threaded body such as a nut or bolt via two upper and lower washers. The blade was clamped and fixed, and a separate stabilizer for positioning the height of the rotary blade above the ground was also fastened together with this screw body. Therefore, when replacing the rotary blade, it was necessary to remove the nut fixed to the end of the rotary shaft and remove the stabilizer and washer, making the replacement work cumbersome.

The present invention provides a bush cutter in which a support for supporting a rotary blade and an engine are connected by an outer pipe, and the rotary shaft is fixed to the end of the rotary shaft rotatably supported by the support by a threaded body. A cylindrical stabilizer is provided at the center of the lower surface of the flange body to surround the threaded body and extend downward, and the rotary blade is disposed near the outer periphery of the stabilizer. By removably fixing it to the bottom surface, there is no need to remove the stabilizer and flange body that are fixed to the end of the rotating shaft, and the rotary blade can be directly attached to and detached from the flange body, making replacement work easy. This is what we are trying to provide.

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

In FIGS. 1 and 2, reference numeral 1 denotes an outer pipe that connects an engine 7 to a support 5 that rotatably supports a rotary blade 3. 9 is outer pipe 1
A grip portion 11 is secured to a handle 13 that is secured to the outer pipe 1. 1
Reference numeral 5 denotes a transmission shaft passing through the inside of the outer pipe 1, one end of which is supported by a bearing 17, and a bevel gear 19 is engaged with the end by a spline 21. Reference numeral 23 denotes a rotating shaft rotatably supported on the support body 5 by a bearing 25, and a bevel gear 2 that engages with the bevel gear 19 is provided at the upper end.
7 is integrally provided, and a cast flange body 31 is engaged with the lower end via a spline 29, and is fixed to the rotating shaft 23 by a screw body (a nut in this embodiment) 33. 35 is a bolt that fixes the rotary blade 3 to the flange body 31; 37 is a stabilizer that protrudes downward from the bottom surface of the flange body 31 surrounding the screw body 33; the stabilizer is used to position the rotary blade 3 from the ground and to stabilize the grass on the ground; This is to keep the cutting length constant. The stabilizer 37 is provided integrally with the flange body 31. 39 is rotary blade 3
The cover covers the upper surface of the support body 5 and is fixed to the support body 5 with screws 41.

In the above embodiment, the rotary blade 3 is rotated by the drive of the engine 7 via the transmission shaft 15, the bevel gears 19 and 27, and the rotary shaft 23. The operator holds the grips 9 and 11 with both hands to cut grass and the like on the ground. When the rotary blade 3 is worn out and needs to be replaced, simply remove the bolts 35, 35, etc.
can be easily replaced.

Note that the flange body is not limited to being made by casting, and may be provided by press-forming a metal plate.

Since the present invention has the configuration as described in the claims, the rotary blade can be easily replaced without the need to remove the stabilizer and flange body, and the ground contact radius of the stabilizer can be reduced. , the lateral movement of the reaping part is reduced to allow safe work, and the structure is simple and can be manufactured at low cost.

Note that FIG. 3 shows the main parts of a conventional brush cutter, in which the rotary blade 3 is held between an upper washer 43 and a lower washer 45, and is fixed by a screw body (nut) 33. A separate stabilizer 47 is also tightened with the nut 33. Further, the same reference numerals as those shown in FIGS. 1 and 2 represent the same components.

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 one embodiment of the present invention;
The figure is a side sectional view of the main part, and FIG. 3 is a side sectional view of the main part of a conventional brush cutter. Explanation of the symbols representing the main parts of the drawing, 1...
Outer pipe, 3... rotary blade, 5... support body,
7... Engine, 23... Rotating shaft, 31... Flange body, 33... Screw body, 37... Stabilizer.

Claims (1)

[Scope of utility model registration request] In a brush cutter in which a support body 5 supporting a rotary blade 3 and an engine 7 are connected by an outer pipe 1, a screw body 33 is attached to an end of a rotary shaft 23 rotatably supported by the support body 5. A flange body 31 is fixed thereto, and a cylindrical stabilizer 37 is provided at the center of the lower surface of the flange body 31 to surround the screw body 33 and extend downward. A brush cutter characterized in that the brush cutter is provided near the outer periphery of the flange body 31 and is detachably fixed to the lower surface of the flange body 31.