JP3074288U - Rotary blade for mowing - Google Patents

Abstract

(57) [Summary] [Objective] To provide a rotary blade that reduces the burden of mowing. A suitable cutting blade is formed on an outer peripheral edge of a circular blade plate, a mounting hole for an apparatus body is provided at a central portion, and a cut-and-raised blade for preventing entanglement is provided around the mounting hole. Are provided so as to be point-symmetric with respect to the center of the circular blade plate.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a rotary blade used for an electric mower or an engine-driven mower.

[0002]

[Problems to be solved by conventional techniques and devices]

 Electric mowers and engine-driven mowers used for mowing banks, shores, and forests are equipped with rotary blades, which are basically hardened on the outer periphery of the disk at the edge of the disk. An ordinary blade or a carbide tip blade is formed, a mounting hole (mounting portion) is provided in the center, and the blade is mounted on a rotating shaft of a mower, and the grass is cut by rotating the rotary blade.

[0003] Furthermore, in use, a cut-and-raised blade is particularly provided around the mounting portion so that grass is not entangled with the rotating shaft (registered utility model No. 3045491). However, the provision of the cutting and raising blade increases the reaction force against the equipment during mowing work, and increases the physical burden of the mowing operator. Therefore, the present invention proposes a rotary blade that reduces the work load using a mowing device.

[0004]

[Means for Solving the Problems]

 The rotary blade for mowing according to the present invention has an appropriate cutting blade formed on an outer peripheral edge of a circular blade plate, a mounting hole for a device main body is provided at a central portion, and a cut-and-raised blade for preventing entanglement is provided around the mounting hole. In addition to this, a large number of small through-holes are provided so as to be point-symmetric with respect to the center of the circular blade plate.

[0005]

[Action]

 When the rotating blade is mounted on the equipment body and the grass is moved by rotating the rotating blade in a horizontal state, mowing is performed with the cutting blade on the outer periphery, and the grass located on the upper surface of the blade plate is cut with the blade of the cutting and raising blade. At the same time, the blade plate itself is reduced in weight by the through holes, so that the operation becomes easy.

[0006]

【Example】

 Next, an embodiment of the present invention will be described. The rotary blade for mowing of the illustrated embodiment has a cutting blade 2 formed on an outer peripheral portion of a blade plate 1 made of a circular metal plate, and a mounting hole 3 for a rotary shaft of the apparatus main body A is formed at the center thereof. 1, a cut-and-raised blade 4 for preventing entanglement of grass is provided, and a small through hole 5 is further formed in the blade plate 1.

The cutting blade 2 is formed by forming the outer periphery of the blade plate 1 into a corrugated shape, forming a blade on the edge portion facing in the rotation direction, and appropriately heat-treating the blade. Alternatively, a blade body formed of a carbide tip body may be attached by brazing.

The cut-and-raised blade 4 is provided in two pieces so as to be point symmetrical with the mounting hole 3 being stopped, and has a trapezoidal blade body 41 in which the mounting hole 3 side is a long lower side and the outer peripheral side is a short upper side. In addition, a peripheral portion of the blade body 41 is formed as a hole 42 so that a side opposite to the rotation direction has a tip portion withdrawn in the rotation direction. The blade 43 is cut and raised so as to protrude, and a blade portion 43 is formed on the entire side facing the rotation direction.

The small through holes 5 are formed at multiple concentric positions around the mounting hole 3, and the small through holes 51, 52, 53 located on each concentric circle have the same diameter and They are formed at equal intervals, and have a small diameter in the order of the outer small hole 51, the middle small hole 52, and the inner small hole 53.

A rotary blade is mounted on the rotary shaft of the apparatus main body A through the mounting hole 3. The blade is moved with the rotating rotary blade in a horizontal state, and the blade is moved by the cutting blade on the outer periphery of the rotary blade. The mowing is performed. Especially, when the mowing work is performed, the grass located on the upper surface of the blade plate 1 is easily entangled with the rotating shaft. Is to be removed in the outer peripheral direction along the blade portion 43.

[0011]

[Effect of the invention]

 As described above, according to the present invention, the cut-and-raised blade provided on the upper surface of the blade plate has a trapezoidal shape in which the cut-and-raised portion is on the outer peripheral side, the base side is the mounting hole side, and the blade portion is formed on the entire edge facing the rotating direction. A mowing rotary blade provided with a number of small through-holes so as to be point-symmetrical with respect to the center of the circular blade plate. The grass located on the upper surface of the plate is cut off or removed in the outer circumferential direction to prevent the grass from getting entangled with the rotating shaft, while reducing the weight of the blade plate itself and reducing the workload of mowing work.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a plan view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blade plate 2 Cutting blade 3 Mounting hole 4 Cut-and-raised blade 41 Blade body 42 Drilling hole 43 Blade part 5 Small through hole

Claims (3)

[Utility model registration claims] 1. A suitable cutting blade is formed on an outer peripheral edge of a circular blade plate, a mounting hole for a device main body is provided in a central portion, and a cut-and-raised blade body for preventing entanglement is provided around the mounting hole. A rotary blade for mowing, wherein the small through holes are provided so as to be point-symmetric with respect to the center of the circular blade plate. 2. The mowing rotary blade according to claim 1, wherein the small through holes are arranged in multiple stages concentrically with respect to the center of the circular blade body, and the diameter gradually decreases as approaching the center. 3. The cutting and raising blade has a trapezoidal shape with the cutting and raising end portion on the outer peripheral side and the base side portion on the mounting portion side. The rotary blade for mowing according to claim 1 or 2, further comprising a blade portion whose front portion is retracted.