CN209861612U - Improved blade of rotary mower - Google Patents

Abstract

The utility model discloses an improved blade of a rotary mower, in particular to a blade of a rotary mower which is structurally improved and comprises a cutter body, a mounting hole arranged at the tail part of the cutter body, cutting blades arranged at two sides of the cutter body and the like, wherein the cutter body is creatively designed into a curved cutter type, two sides of the cutter body of the curved cutter type are respectively provided with an inner arc cutting blade and an outer arc cutting blade, and the outer arc cutting blade is also an outer arc cutting tooth; therefore, the improved curved blade has smaller wind resistance and smaller reaction force of cutting impact force during rotary cutting, so that the cutting edge is not easy to be damaged, the service life is influenced, particularly, the cutting teeth with the arc shape can effectively improve the cutting force, and even harder sundries such as shrubs hidden in the grass can be cut off smoothly; in addition, the anti-reverse positioning column is additionally arranged at the tail of the cutter body, so that the accuracy of the mounting position of the bent cutter type blade is ensured, and reverse mounting is avoided.

Description

Improved blade of rotary mower

Technical Field

The utility model relates to a blade structure of lawn mower specifically indicates an improved generation blade of rotation type lawn mower.

Background

At present, a blade structure of a rotary mower mainly comprises a cutter body, a mounting hole arranged at the tail part of the cutter body, cutting edges arranged at two sides of the cutter body and the like, wherein the mounting hole is used for mounting the blade on a cutter rest of the rotary mower, the cutting edges at two sides of the cutter body are both linear edges, and a cutting edge is also a traditional cutting edge of a cutter; therefore, the blade structure can only well finish the mowing action, but for hard sundries such as undershrubs hidden in the grass, the cutting blade is flat and cannot effectively cut off by adopting the cutting edge of the cutting knife; meanwhile, the cutting edge with the straight cutting edge has larger wind resistance in the rotating process and is easy to be intensively recoiled by the cutting impact force, so that the service life of the cutting edge is influenced, and the installation stability of the installation hole at the tail part of the cutter body is also influenced.

Disclosure of Invention

The utility model aims to solve the technical problem that overcome prior art's defect and provide a windage is little when rotatory cutting, receive the counter-force of cutting impact force little, cutting force is powerful, long service life's an improved generation blade of rotation type lawn mower.

The technical problem of the utility model is realized through following technical scheme:

the utility model provides an improved generation blade of rotation type lawn mower, includes the cutter body, sets up the mounting hole at the cutter body afterbody and sets up the cutting sword in the cutter body both sides, the cutter body be the bent sword type, the cutter body both sides of this bent sword type are equipped with inner arc cutting sword and outer arc cutting sword respectively, and outer arc cutting sword is an outer curved cutting tooth.

The tail of the cutter body is provided with an anti-reverse positioning column arranged adjacent to the mounting hole.

The mounting hole is composed of a big hole, a small hole positioned at the rear side of the big hole and a hole connecting part connected between the big hole and the small hole.

The hole connecting part is in a shape of Chinese character Ba, the big opening end of the shape of Chinese character Ba is connected with the big hole, the width of the big opening end is smaller than the diameter of the big hole, the small opening end of the shape of Chinese character Ba is connected with the small hole, and the width of the small opening end is smaller than the diameter of the small hole.

The inner arc cutting edge is an inner arc cutting knife.

The cutter body gradually becomes smaller from a larger tail part to a head part.

The cutter body is made of plastic materials.

Compared with the prior art, the utility model creatively changes the blade shape of the traditional rotary mower, and designs the blade into a curved knife shape, the two sides of the knife body of the curved knife shape are respectively provided with an inner arc cutting edge and an outer arc cutting edge, and the outer arc cutting edge is also an outer arc cutting tooth; therefore, the improved curved blade has smaller wind resistance and smaller reaction force of cutting impact force during rotary cutting, so that the cutting edge is not easy to be damaged, the service life is influenced, particularly, the cutting teeth with the arc shape can effectively improve the cutting force, and even harder sundries such as shrubs hidden in the grass can be cut off smoothly; in addition, the anti-reverse positioning column is additionally arranged at the tail of the cutter body, so that the accuracy of the mounting position of the bent cutter type blade is ensured, and reverse mounting is avoided.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a perspective view of fig. 1.

Fig. 4 is a schematic structural view of the utility model mounted on the knife rest of the rotary mower.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in fig. 1 ~ and fig. 4, the cutter comprises a cutter body 1, an inner arc cutting edge 2, an outer arc cutting edge 3, a mounting hole 4, a large hole 41, a small hole 42, a hole connecting part 43, an anti-reverse positioning column 5, a cutter frame 6, a fillet 61, and a positioning pin 7.

An improved blade of a rotary mower, as shown in fig. 1 ~ and fig. 3, mainly improves the structure of the blade of the rotary mower, and comprises a cutter body 1, a mounting hole 4 arranged at the tail part of the cutter body, cutting edges arranged at two sides of the cutter body and the like.

Wherein, cutter body 1 is made for the plastics material, it compares nylon rope or metal blade commonly used and has with low costs, the installation is firm, it is convenient to change, advantages such as cutting effect is good, cutter body 1 wholly is the design of curved knife type, and by great afterbody diminishes to the prelude gradually, this kind of appearance structure can be driven by the knife rest 6 of rotation type lawn mower and when doing the rotation cutting, can receive littleer windage, and the counter-force that receives the cutting impact force is also littleer in addition, thereby difficult damage cutting edge, influence life.

Two cutting edges are an inner arc cutting edge 2 and an outer arc cutting edge 3 which are respectively arranged at two sides of the bent cutter type cutter body 1, the inner arc cutting edge 2 is an inner arc-shaped cutting knife, the outer arc cutting edge 3 is creatively designed into an outer arc-shaped cutting tooth, the outer arc-shaped cutting tooth has stronger cutting force, and even harder sundries such as small shrubs hidden in a grass cluster can be cut off smoothly.

The mounting hole 4 is composed of a large hole 41, a small hole 42 positioned at the rear side of the large hole and a hole connecting part 43 connected between the large hole and the small hole, the hole connecting part is in a splayed shape, the large opening end of the splayed shape is connected with the large hole 41, the width of the large opening end is smaller than the diameter of the large hole 41, the small opening end of the splayed shape is connected with the small hole 42, and the width of the small opening end is smaller than the diameter of the small hole 42.

Therefore, as shown in fig. 4, the blade mounting structure can be configured such that the positioning pin 7 on the blade holder 6 is sleeved with the large hole 41 with a larger diameter, and then the blade is pulled axially outward, so that the positioning pin 7 is clamped in the small hole 42 with a smaller diameter through the hole connecting portion 43, that is, the blade is fixed on the blade holder 6.

And the periphery of the bottom of the tool rest 6 needs to be designed into a round corner 61 so as to reduce wind resistance in the process of high-speed rotation of the tool rest 6.

In addition, the tail part of the cutter body 1 is also provided with an anti-reverse-installation positioning column 5 arranged adjacent to the mounting hole 4, particularly adjacent to the small hole 42, so that the accuracy of the mounting position of the bent cutter type blade is ensured, potential safety hazards caused by reverse installation are avoided, and the position of the anti-reverse-installation positioning column after being mounted faces upwards.

The utility model discloses an all made the improvement on blade overall length and shape, increased and increased radial dimension to make the rotatory in-process windage of blade littleer, the counter-force that receives the impact force is also littleer, thereby avoids influencing the installation stability of blade on knife rest 6.

The above description is only an embodiment of the present invention, and it should be understood by those skilled in the art that any structural design equivalent to this embodiment is included in the scope of the present invention.

Claims (7)

1. The utility model provides an improved generation blade of rotation type lawn mower, includes cutter body (1), sets up mounting hole (4) and the cutting edge of setting in the cutter body both sides at the cutter body afterbody, its characterized in that cutter body (1) be the bent sword type, cutter body (1) both sides of this bent sword type are equipped with inner arc cutting edge (2) and outer arc cutting edge (3) respectively, and outer arc cutting edge is an outer curved cutting tooth.

2. The improved blade of rotary mower as claimed in claim 1, wherein said body (1) is provided at the rear with anti-reverse positioning posts (5) disposed adjacent to said mounting holes (4).

3. An improved blade for a rotary mower as claimed in claim 1 wherein said mounting hole (4) is defined by a large hole (41), a small hole (42) located behind the large hole and a hole connecting portion (43) connecting the large and small holes.

4. The improved blade of rotary mower as claimed in claim 3 wherein said hole connecting portion (43) is in the shape of a chevron, the major end of which is connected to the major hole (41) and the width of which is less than the diameter of the major hole (41), the minor end of which is connected to the minor hole (42) and the width of which is less than the diameter of the minor hole (42).

5. An improved blade for a rotary mower as claimed in claim 1 wherein said inner arcuate cutting edge (2) is an inner arcuate cutting blade.

6. An improved blade for a rotary mower as claimed in claim 1 wherein said body (1) tapers from a larger tail portion to a leading portion.

7. An improved blade for a rotary mower as claimed in claim 1 wherein said body (1) is made of a plastic material.