JPH0140430Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a brush cutter in which a cutting blade protruding from the outer periphery is fastened and fixed to a rotary plate rotatably supported by a support body using screws.

Conventionally, this type of brush cutter is provided with a cover that covers the top surface of the metal rotating plate, but since there is a gap between the outer peripheral edge of this cover and the rotating plate, this gap In addition, grass etc. caught in the cutting blades sometimes got caught and inhibited rotation.

In the present invention, this cover is made of synthetic resin,
By making it slidably contact the top surface of the rotary blade, the edge of the cover will come into contact with the top surface of the rotor and slide at the beginning of use, but since the cover is made of synthetic resin, the cover will not touch the top surface of the rotor. It wears out quickly due to rotation, and a small gap is formed that prevents further wear.
This minute gap prevents grass caught in the cutting blade from entering between the cover and the rotary blade, and allows for smooth rotation.

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

In FIGS. 1 and 2, 1 is a support that rotatably supports the cutting blade 3, and 5 is an engine 7 and a support 1.
A connecting rod 9 that connects the two is a handle that is fixed to the connecting rod 5 and has a grip portion 11 at its end. 1
3 is a grip portion directly fixed to the connecting rod 5. 1
5 is a cover that covers the upper part of the cutting blade 3. Support 1
is fitted into one end of the connecting rod 5 and fixed by screws 17, 17. Reference numeral 19 denotes a transmission shaft passing through the interior of the connecting rod 5, which is rotatably supported by the support body 1 via a bearing 21, a bevel gear 23 is fixed to one end, and the other end is interlocked with the engine 7. Reference numeral 25 denotes a rotating shaft which is rotatably supported on the support body 1 via bearings 27, 27. A bevel gear 29 that engages with the bevel gear 23 is formed at the upper end, and is rotated by a bolt 31 screwed into the lower end. A rotating plate 27 is clamped and fixed between an upper washer 33 and a lower washer 35. 39 is a threaded plate fixed to the upper surface of the rotary plate 37 by spot welding or rivets, and the lower surface of the rotary plate 37 is provided with cutting blades 3, 3, . The cutting blade 3 is
It is fixed by a bolt 41 that passes through the cutting blade 3 and the rotary plate 37 and is screwed into the threaded plate 39. 53
numeral 55 and 57 are collars, and 59 is an oil seal. cover 15
is provided to cover the upper surface of the rotary plate 37, is made of synthetic resin, has an outer peripheral edge with an inclined surface on the upper surface, and has a lower surface of the outer peripheral edge in slidable contact with the upper surface of the rotary plate 37. Reference numeral 61 denotes a boss portion provided near the center of the cover 15 so as to protrude downward, and its inner diameter portion fits into the outer peripheral portion of the lower part of the support body 1 . 63 is a notched groove cut out in the axial direction of the boss portion 61; 65 is a fixing fitting that fits on the outer periphery of the boss portion 61;
The boss portion 61 is fixed to the support body 1 by. A cylindrical body 71 is held by a bolt 31 on the lower surface of the lower washer 35, and an inner race of the bearing 73 is held by the bolt 31. Reference numeral 75 designates a flange body that fits into the outer race of the bearing 73, and fixes the protection plate 79 with screws 77, 77. The cover 79 protects the bolts 31, the rotary plate 37, etc., and also regulates the length of mowing of grass and the like.

In the above embodiment, the power of the engine 7 is
Transmission shaft 19, bevel gears 23, 29, rotating shaft 2
The cutting blade 3 is rotated through the handle 5, and the operator grasps the grips 11 and 13 to cut grass and the like. The outer edge of the upper cover 15 slides in contact with the rotary plate 37, but as it rotates, it wears out and creates a small gap, causing the cutting blade 3
Grass, etc. caught in the groove will not enter this gap, and the grass, etc. will be removed along the slope of the upper surface of the outer edge.

Since the present invention has the configuration as described in the claims, the gap between the cover and the rotary plate is made minute, and
It prevents grass etc. from entering and allows smooth mowing work.

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;
The figure is a side sectional view of the main part. Explanation of the symbols representing the main parts of the drawing, 3...
Cutting blade, 15...cover, 37...rotating plate.

Claims (1)

[Scope of utility model registration request] A cover 15 made of synthetic resin is provided to cover the upper surface of the rotary plate 37 to which the cutting blade 3 is fixed, and the outer edge of the cover 15 is provided in slidable contact with the upper surface of the rotary plate 37.・Brush cutter.