CN212936575U

CN212936575U - Rotary blade

Info

Publication number: CN212936575U
Application number: CN202021720453.9U
Authority: CN
Inventors: 周振强
Original assignee: Tianjin Alfa Li Fengyuan Agricultural Machinery Manufacturing Co ltd
Current assignee: Tianjin Alfa Li Fengyuan Agricultural Machinery Manufacturing Co ltd
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2021-04-13
Anticipated expiration: 2030-08-17

Abstract

The utility model discloses a rotary blade, including handle of a knife, blade and the tool bit that has the mounting hole, its characterized in that: convex ribs are arranged on two sides of the joint of the knife handle and the knife body, and the convex ribs are of a convex rib structure; the convex rib extends to the middle position of the knife body along the bent square shape of the knife body to the knife head, and the end part of the convex rib is in arc smooth transition to the knife body on the side of the knife head. The utility model adopts that two sides of the joint of the knife handle and the knife body are provided with two-way convex ribs; the bending torsion resistance of the connecting part is further improved, and when the connecting part is subjected to a large external force, the cutter body is not easy to deform and break, so that the overall service life of the cutter is prolonged; in addition, the convex rib structure with the bidirectional single convex rib structure is adopted, and the problem that the rotary tillage cutter is adhered with sundries is effectively avoided.

Description

Rotary blade

Technical Field

The utility model belongs to the technical field of the rotary cultivator, especially, relate to a rotary blade.

Background

The rotary blade is a cutter accessory of a rotary cultivator used for scratching the ground of a farmland, and the cutting edge of the rotary blade mills the plowed soil in the farmland, then throws the milled plowed soil to the back and smashes the plowed soil, thereby playing roles of loosening the soil and smashing the soil. The rotary blade comprises a blade handle, a blade body and a blade head, wherein the blade body is gradually widened from the lower end part of the blade handle, and the end part of the blade body is bent towards one side; the inner edge of the knife body is a knife back, the outer edge of the knife body is a knife edge, and the thickness of the knife body is gradually reduced from the knife back to the knife edge; wherein the knife handle is provided with a through mounting hole for fixing the rotary blade; in the actual use process, the blade part of the rotary blade is vertically contacted with the ground, the blade part of the rotary blade is thinner, the blade back is thicker and does not participate in milling ploughing soil, the blade is subjected to larger impact force of the ploughing soil in the milling process, the blade is seriously abraded, the service life of the rotary blade is shorter, along with the development of the technology, the wear-resisting strength of the blade is improved by heat treatment or composite alloy steel at the blade part, but the connection part of the tool handle and the tool body is easy to distort or break; once the twisting happens, the cutting angle of the blade is changed, and the rotary tillage effect is further influenced; the concave surface and the convex surface of the protrusion 201 in the prior art can be randomly arranged on the front surface or the back surface of the rotary blade, the metallographic structure of the rotary blade is changed from the original crystalline grain in the form of densely-arranged straight lines to the crystalline grain in the form of densely-arranged curves by changing the surface shape of the rotary blade, the characteristics of enhancing the rigidity and the strength of the geometric surface of an object are facilitated, and the bending deformation or the fracture phenomenon of the rotary blade caused by too concentrated acceptance in the working process of the rotary blade is overcome.

The applicant develops a novel rotary blade in 2013 and applies for a patent with the publication number of CN 203313605U; the utility model provides a novel rotary blade, which solves the problem of short service life of the prior rotary blade, and comprises a handle provided with a fixed blade hole, a raised bending part, a blade body and a blade head; the blade includes: the knife back, the transition area and the knife edge. On the premise of not increasing the metal quantity, the bent part with larger stress of the rotary blade is provided with the convex reinforcing rib at one side concave, so that the bearing capacity of the rotary blade is enhanced, the service life of the rotary blade is effectively prolonged, the structure is simple, the service life of the blade is still not ideal, the concave part still can be broken or bent, and meanwhile, sundries are adhered to the concave surface, so that the effective operation time of the rotary cultivator is influenced; therefore, the rotary blade is simple in structure, long in service life and beneficial to cutting.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides a rotary blade with a blade body which is not easy to deform and break, and the whole service life of the blade is prolonged,

the utility model is realized in such a way that,

the utility model provides a rotary blade, includes handle of a knife, blade and the tool bit that has the mounting hole, its characterized in that: convex ribs are arranged on two sides of the joint of the knife handle and the knife body, and the convex ribs are of a convex rib structure; the convex rib extends to the middle position of the knife body along the bent square shape of the knife body to the knife head, and the end part of the convex rib is in arc smooth transition to the knife body on the side of the knife head.

The height of the convex rib is 3-5 mm.

The upper end of the convex rib is provided with a slope surface inclined towards the direction of the knife body.

The upper top surface of the convex rib is provided with a transition plane parallel to the thickness central plane of the knife body.

The width of the transition plane is gradually reduced from the upper edge of the slope surface to the other end of the convex rib.

The utility model has the advantages and technological effect:

the utility model adopts that two sides of the joint of the knife handle and the knife body are provided with two-way convex ribs; the bending torsion resistance of the connecting part is further improved, and when the connecting part is subjected to a large external force, the cutter body is not easy to deform and break, so that the overall service life of the cutter is prolonged; in addition, the convex rib structure with the bidirectional single convex rib structure is adopted, and the problem that the rotary tillage cutter is adhered with sundries is effectively avoided.

Drawings

FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

fig. 3 is a schematic structural view of embodiment 2 of the present invention.

In the drawing, 1, a knife handle; 2. a blade body; 3. a cutter head; 4. a rib is protruded; 4-1, slope surface; 4-2, transition plane.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Embodiment 1, please refer to fig. 1 and 2, a rotary blade, comprising a handle 1 with a mounting hole, a blade 2 and a blade head 3, wherein two sides of the joint of the handle and the blade are provided with convex ribs 4, the convex ribs are of a rib structure, and two surfaces forming the rib are of arc structures, so that the cutting resistance is reduced; the convex rib extends to the middle position of the knife body along the bent square shape of the knife body to the knife head, and the end part of the convex rib is in arc smooth transition to the knife body on the side of the knife head. The utility model adopts that two sides of the joint of the knife handle and the knife body are provided with two-way convex ribs; the bending torsion resistance of the connecting part is further improved, and when the connecting part is subjected to a large external force, the cutter body is not easy to deform and break, so that the overall service life of the cutter is prolonged; in addition, the convex rib structure with the bidirectional single convex rib structure is adopted, and the problem that the rotary tillage cutter is adhered with sundries is effectively avoided.

Further, the height of the convex rib is 3-5 mm.

Furthermore, the upper end part of the convex rib is provided with a slope surface 4-1 which inclines towards the direction of the knife body. Interference between the rotary tillage cutter and the cutter shaft during installation is avoided, and stress is concentrated on the edges of the convex ribs, so that stress of the convex ribs is improved;

in embodiment 2, a transition plane 4-2 parallel to the thickness center plane of the blade body is arranged on the upper top surface of the convex rib, and the width of the transition plane is gradually reduced from the upper edge of the slope surface to the other end of the convex rib; the cutting resistance is prevented from being increased due to the overhigh convex rib. The rest of the structure is the same as in example 1.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention, such as material, dimensions, installation apertures, etc., should be included within the scope of the present invention.

Claims

1. The utility model provides a rotary blade, includes handle of a knife, blade and the tool bit that has the mounting hole, its characterized in that: convex ribs are arranged on two sides of the joint of the knife handle and the knife body, and the convex ribs are of a convex rib structure; the convex rib extends to the middle position of the knife body along the bent square shape of the knife body to the knife head, and the end part of the convex rib is in arc smooth transition to the knife body on the side of the knife head.

2. A rotary blade according to claim 1, wherein: the height of the convex rib is 3-5 mm.

3. A rotary blade according to claim 1, wherein: the upper end of the convex rib is provided with a slope surface inclined towards the direction of the knife body.

4. A rotary blade according to claim 3, wherein: the upper top surface of the convex rib is provided with a transition plane parallel to the thickness central plane of the knife body.

5. A rotary blade according to claim 4, wherein: the width of the transition plane is gradually reduced from the upper edge of the slope surface to the other end of the convex rib.