JP2023504950A - Mowing blades and applications - Google Patents

Abstract

The present invention is in the field of battery lawnmower accessories, and in particular relates to mowing blades and applications. The present invention comprises a base and a plurality of cutter heads, wherein a plurality of cutter holders are evenly distributed on the circumference of the base, the cutter heads are fixedly connected to the cutter holders, and the The mounting direction of the cutter head provides a mowing blade and application in which the blade portion is oriented toward the base. Multiple "teardrop" via holes on the base reduce self-mass and reduce aerodynamic drag when cutting, extending flight time.

Description

The present invention is in the field of battery lawnmower accessories, and in particular relates to mowing blades and applications.

Alloy lawn mower sheets have already been widely applied as accessories for lawn mowers. Blade research and development has become extremely important. Since the electric power drive lacks in power supply and cruising range compared to the fuel drive, the mowing sheet applied on the gasoline lawn mower is not suitable for use in the electric lawn mower, and its own weight and wind resistance As higher demands are being made in terms of reducing noise, it is necessary to extend the cruising time of battery-powered lawn mowers and achieve both the original sharpness and safety.

To solve the above problem, the present invention includes a base and a plurality of cutter heads, a plurality of cutter holders are evenly distributed on the circumference of the base, and the cutter heads are fixed to the cutter holders. A mowing blade is first provided that is connected and the direction of installation of said cutter head is the direction of rotation with the blade pointing towards said base.

As a preferred technical solution, a center hole is provided at an intermediate position of the base.

As a preferred technical solution, a plurality of resistance reduction holes are provided on the base, and the resistance reduction holes are arranged at intermediate positions between the center hole and the cutter holder.

As a preferred technical solution, the shape of the drag reduction hole is teardrop-shaped, and the size is divided into several levels.

As a preferred technical solution, the resistance reduction holes are arranged in such a manner that the resistance reduction holes of the same size are successfully connected and arranged along the circumference.

As a preferred technical solution, the layout method of the resistance reduction holes is to provide the resistance reduction holes of different levels in ascending order from the center to the periphery.

As a preferred technical solution, the direction of the head portion of the drag reduction hole is opposite to the direction of the cutter head. The cutting width of the cutter head is 1.3-2.3 millimeters, preferably the cutting width of the cutter head is 1.5-2.3 millimeters.

As a preferred technical solution, the cutter holder includes a tooth back and a chip discharge groove. The tooth back is designed in an arc streamline shape, and the depth of the chip discharge groove is 5-15 mm.

As a preferred technical solution, the cutter head and the base are fixedly connected by sticking one side to the main body and welding, preferably all sides of the cutter head are ground on one side, The grinding angle direction of the tip of the cutter head is the same.

Preferably, the surface of the mowing blade adopts surface plating layer treatment.

The invention further provides a lawn mowing blade application, said lawn mowing blade being used on a battery lawn mower.

Beneficial effects are as follows.
(1) Multiple "tear drop" via holes on the base to reduce self-mass and reduce air resistance during cutting to extend cruising time.
(2) By reducing the cutting width of the cutter head, the weight of the saw blade and the swept area of the front angle are reduced, thereby reducing the air resistance during cutting and extending the cruising time.
(3) For the welding method, the original intermediate welding of the cutter head was changed to a method in which one side is attached to the main body and welded, and the cutter head and the front of the base (the upper side of the counterclockwise rotation is the front). Flush and grind the back side. Reduce air resistance on the saw blade surface.
(4) The back of the tooth is designed in an arc streamline shape, and the depth of the chip discharge groove is reduced. and reduce the air resistance of the chip discharge groove.
(5) The surface adopts surface plating layer treatment to increase surface finish and reduce surface air resistance.
(6) By designing or improving the above-mentioned multiple surfaces, the aerodynamic force of the blade surface is greatly reduced, the cruising time is extended, and the lawn mowing is more suitable for battery lawn mowers without affecting sharpness and safety. provide blades.

In order to describe the embodiments of the present invention or the technical solutions in the existing technology more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the existing technology. Obviously, the accompanying drawings in the following description are merely some embodiments of the present invention, and those skilled in the art will be able to obtain other accompanying drawings based on these accompanying drawings without creative effort. You can also get drawings.
1 is a structural schematic diagram of a lawn mowing blade according to the present invention; FIG. 2 is an enlarged view of position A in FIG. 1. FIG. FIG. 4 is a diagram of experimental data in Examples. Among which, 1 - base, 2 - cutter head, 3 - center hole, 4 - drag reduction hole, 5 - cutter holder, 6 - tooth holder, 7 - chip discharge groove.

A further understanding of the present invention can be obtained with reference to the following detailed description of the preferred method of practicing the invention and the included examples.

When describing embodiments of the present application, the use of "preferred," "preferred," "more preferred," etc. refer to implementations of the invention that may provide certain beneficial effects in some cases. However, other implementations may be preferred in the same or other cases. Furthermore, the description of one or more preferred implementations does not imply that other implementations are not available, nor is it intended to exclude other implementations from the scope of the present invention.

The present invention comprises a base and a plurality of cutter heads, wherein a plurality of cutter holders are evenly distributed on the circumference of the base, the cutter heads are fixedly connected to the cutter holders, and the The direction of installation of the cutter head first provides a mowing blade with a rotational direction in which the blade points toward said base. When viewed from the angle shown in FIG. 1, the direction of rotation of the base is counterclockwise rotation.

In some preferred embodiments, a central hole is provided in the middle of the base. The size of the center hole diameter is set according to the main shaft diameter of the electric lawn mower.

In some preferred embodiments, a plurality of drag reduction holes are provided on the base, and the drag reduction holes are arranged in an intermediate position between the central hole and the cutter holder.

In some preferred embodiments, the drag-reducing holes are tear-drop shaped and divided into multiple levels of size.

In some preferred embodiments, the drag reduction hole arrangement scheme is such that the drag reduction holes of the same size are arranged in succession along the circumference.

In some preferred embodiments, the layout scheme of the resistance reduction holes is to provide the resistance reduction holes of different levels in ascending order from the center to the periphery.

In some preferred embodiments, the orientation of the heads of the drag reduction holes is opposite to the orientation of the cutterhead. When viewed from the angle shown in FIG. 1, the orientation of the cutter head is in the counterclockwise direction, the orientation of the relatively thin portion of the drag reduction hole is in the clockwise direction, and the cutting width of the cutter head is: 1.3 to 2.3 millimeters, preferably the cutting width of said cutter head is 1.5 to 2.3 millimeters. In the present invention, the cutting width is the thickness of the cutter head.

In some preferred embodiments, the cutter holder includes back teeth and chip evacuation grooves. The tooth back is designed in an arc streamline shape, and the depth of the chip discharge groove is 5-15 mm. The depth of the chip flute is the length from the lowest point of the chip flute to the highest point of the cutter head.

In some preferred embodiments, the cutter head and the base are fixedly connected by a method of sticking one side to the main body and welding, preferably all sides of the cutter head are one-sided ground. .

The cutter head and the front face of the base (the upper side of counterclockwise rotation is the front face) are flush with each other, and the back face is ground. Reduce air resistance on the saw blade surface.

Preferably, the grinding angle direction of the tips of all said cutter heads is the same. As a result, the wind-swept area is reduced, the air resistance during cutting is reduced, and the cruising time is extended.

In some preferred embodiments, the surface of the mowing blade adopts a surface plating layer treatment.

The invention further provides a lawn mowing blade application, said lawn mowing blade being used on a battery lawn mower.
Example

In the following, the technical solution of the present invention is described in detail through examples, but the protection scope of the present invention is not limited to the examples.

A set of control tests will now show the tangible effect of a mowing blade according to the invention in reducing wind resistance and extending endurance. The experimental group is the mowing blade according to the present invention, and the control group is the commercially available common JIS (230×36P).

Experimental group: The mowing blade according to the present invention comprises a base 1 and a cutter head 2, with a plurality of cutter holders 5 evenly distributed on the circumference of said base, said cutter head 2 being attached to said cutter holder 5 and the direction of attachment of the cutter head is the direction of rotation in which the blade faces the base 1 . The base 1 has a central hole 3 at an intermediate position. The diameter of said central hole 3 is 25.4 millimeters. A plurality of resistance reduction holes 4 are provided on the base 1 , and the resistance reduction holes 4 are arranged at intermediate positions between the center hole 3 and the cutter holder 5 . The resistance reduction holes 4 are teardrop-shaped and divided into five sizes. The arrangement of the resistance reduction holes 4 is such that the resistance reduction holes 4 of the same size are successfully connected and arranged along the circumference. As for the layout method of the resistance reduction holes 4, the resistance reduction holes 4 are provided at different levels in ascending order from the center to the periphery. The direction of the head portion of the resistance reducing hole 4 is opposite to the orientation of the cutter head 2 . The cutting width of the cutter head 2 is 1.6 mm. In the present invention, the cutting width is the thickness of the cutter head 2 . The cutter holder 5 includes a tooth back 6 and a chip discharge groove 7 . The tooth back 6 is designed in an arc streamline shape, and the depth of the chip evacuation groove 7 is 7.3 millimeters. The depth of the chip flute is the length from the lowest point of the chip flute to the highest point of the cutter head. The cutter head 2 and the base 1 are fixedly connected by sticking one side to the main body and welding. All sides of the cutter head 2 are one-sided ground. The cutter head 2 and the front surface of the base 1 (the upper side of the counterclockwise rotation is the front surface) are flush with each other, and the back surface is ground. Reduce air resistance on the saw blade surface. The grinding angle direction of the tips of all the cutter heads 2 is the same. As a result, the wind-swept area is reduced, the air resistance during cutting is reduced, and the cruising time is extended. The surface of said mowing blade adopts surface plating layer treatment.

Control group: (JIS230×36P), mowing blades purchased from the market.

Experiment content: (a) weigh two mowing blades of the experimental group and the control group; Measure how long it takes to consume.

Data analysis: in weight comparison, the experimental group is 3.02% heavier than the control group, the difference is negligible; in the battery operating time comparison, the experimental group's time is 20.79% longer than the control group, according to the experimental results And, given no difference in weight, the mowing blade according to the invention has a considerable advantage in reducing air resistance and extending endurance.

The accompanying drawings of the embodiments of the present disclosure relate only to the structures according to the embodiments of the present disclosure, and other structures may refer to the general design.

For the sake of clarity, the thicknesses of layers or regions may be exaggerated or reduced in the accompanying drawings to illustrate embodiments of the present disclosure, i.e., the accompanying drawings are not drawn to scale.

Where not conflicting, embodiments of the present disclosure and features in embodiments can be combined with each other to obtain new embodiments.

Finally, it should be noted that the above is merely for the purpose of describing the technical solution of the present invention, not limiting the protection scope of the present invention. Any simple amendment or equivalent replacement shall not depart from the spirit and scope of the technical solution of the present invention.

Claims (10)

comprising a base (1) and a plurality of cutter heads (2), with a plurality of cutter holders (5) evenly distributed on the circumference of said base (1), said cutter heads (2) being attached to said cutters A lawn mowing blade, characterized in that it is fixedly connected to a holder (5), and wherein the mounting direction of said cutter head (2) is the direction of rotation in which the blade is directed towards said base (1). Mowing blade according to claim 1, characterized in that the base (1) is provided with a central hole (3) in an intermediate position. A plurality of resistance reduction holes (4) are provided on the base (1), and the resistance reduction holes (4) are arranged at intermediate positions between the center hole (3) and the cutter holder (5). A mowing blade according to claim 1 or 2, characterized in that: The shape of the resistance reduction holes (4) is teardrop-shaped, and the size is divided into a plurality of levels. 4. A mowing blade according to claim 3, characterized in that it is arranged contiguously along the . The mowing blade according to claim 4, characterized in that the layout method of the resistance reduction holes (4) is arranged in ascending order from the center to the periphery. The direction of the head portion of the resistance reduction hole (4) is opposite to the orientation of the cutter head (2), and the cutting width of the cutter head (2) is 1.3 to 2.3 mm, preferably Mowing blade according to claim 1, characterized in that the cutting width of the cutter head (2) is between 1.5 and 2.3 millimeters. The cutter holder (5) includes a tooth back (6) and a chip discharge groove (7), the tooth back (6) is designed in an arc streamline shape, and the depth of the chip discharge groove (7) is is between 5 and 15 millimeters. The cutter head (2) and the base (1) are fixedly connected by sticking one side to the main body and welding, preferably all sides of the cutter head (2) are ground A mowing blade according to claim 7, characterized in that the grinding angle direction of the tips of all said cutter heads (2) is the same. The mowing blade according to claim 1, wherein the surface of the mowing blade adopts surface plating layer treatment. Application of a lawn mowing blade, characterized in that the lawn mowing blade according to claims 1-9 is used on a battery lawn mower.

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