CN109302905B

CN109302905B - Bionic gardening scissors

Info

Publication number: CN109302905B
Application number: CN201811283117.XA
Authority: CN
Inventors: 王虎彪; 马云海; 赵宏伟; 齐红岩; 王慧鑫; 禹江涛; 芭芭拉·布尚; 庄健; 佟金
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2023-08-29
Anticipated expiration: 2038-10-31
Also published as: CN109302905A

Abstract

The invention relates to bionic gardening scissors, belonging to the technical field of gardening tools, wherein the inner sides of the upper parts of a half knife I and a half knife II are blade parts, the blade parts of the half knife I and the half knife II are provided with bionic curve structures, the outer sides of the upper parts of the half knife I and the half knife II are knife backs with bionic curves, the lower part of the half knife I is provided with a knife handle and a torsion spring mounting through hole, the torsion spring is mounted, and the knife backs are smoothly connected with the knife handle at the lower part through an arc; the bionic curve of the bamboo rat incisors is applied to the blade structure of the gardening scissors, and the bionic gardening scissors are designed, so that compared with the existing gardening scissors in the market, the bionic gardening scissors are lower in cutting resistance, higher in cutting efficiency and better in sharpness, can cut tough plants at one time, and are good in wear resistance and longer in service life.

Description

Bionic gardening scissors

Technical Field

The invention belongs to the technical field of gardening tools, and particularly relates to bionic gardening scissors.

Background

The gardening scissors are simple to operate and convenient to carry, and are one of the necessary tools for gardening operation of gardening workers.

The existing gardening scissors on the market have the following problems: when the same gardening scissors are used for pruning different types of plants, the cutting edge is easy to damage, the wear resistance is poor, and the service life is short; when the tough plants are trimmed, the efficiency is low, the sharpness is insufficient, and more than two times of shearing are often needed to cut the plants. Therefore, the garden shears have the advantages of strong wear resistance, good sharpness, high cutting efficiency and long service life, and are the development direction of the garden shears in the future.

In the past, the research is most from arm of force, material and overall structure of gardening scissors to improve gardening scissors wearability and sharpness, and then improves work efficiency, increase life. There are few studies on the structural design of blades of garden shears, and in particular, there are few studies on applying the bionic principle to the structural design of blades of garden shears. The design and the manufacture of the existing gardening scissors need to be improved and perfected, and a new design and manufacture method and theory of the gardening scissors need to be explored. On the basis of the existing gardening scissors design and manufacturing method, the bionic principle is applied to design novel wear-resistant sharp bionic gardening scissors, so that the working efficiency and the service life of the novel wear-resistant sharp bionic gardening scissors are improved, and the novel wear-resistant sharp bionic gardening scissors have very important theoretical significance and practical significance for development of gardening scissors technology and landscaping industry.

Bamboo rat gets the name because of eating the bamboo, and its incisor is thick, has optimized geometry and good mechanical properties, and in the feeding in-process, incisor cutting efficiency is high, and the cutting resistance that receives is low, consequently is applied to gardening scissors blade structural design with the bionic curve of bamboo rat incisor, optimizes geometry and mechanical properties of gardening scissors, designs a novel bionic gardening scissors.

Disclosure of Invention

The invention aims to solve the defects of the existing gardening scissors in the market and provides the bionic gardening scissors which are strong in wear resistance, good in sharpness, high in operation efficiency and long in service life.

The invention consists of a half cutter IA, a half cutter IIB, a pin shaft 1 and a torsion spring 2, wherein the half cutter IA consists of a cutter head I7 and a cutter handle I4, a middle hole I6 is formed at the joint of the cutter head I7 and the cutter handle I4, and a hanging hole 5 is formed at the near lower end of the cutter handle I4; the joint of the cutter head I7 and the cutter handle I4 is in smooth transition.

The half cutter II B consists of a cutter head II 11 and a cutter handle II 9, and a middle hole II 10 is formed in the joint of the cutter head II 11 and the cutter handle II 9; the joint of the cutter head II 11 and the cutter handle II 9 is in smooth transition.

The cutter head I7 and the cutter head II 11 have the same structure and opposite directions; the inner surfaces of the cutter head I7 and the cutter head II 11 are provided with cutting edges 3, and the outer surfaces of the cutter head I7 and the cutter head II 11 are provided with cutter backs 8; the contour line of the blade 3 is a bionic curve C of a cd section, and the contour line of the back 8 is a curve D of an ef section; the connection line of the upper ends of the bionic curve C and the bionic curve D is a cf section straight line E, and the length of the straight line E is 0.6-1.8mm.

The middle parts of the half knife I A and the half knife II B are movably connected through a pin shaft 1.

The left end of the torsion spring 2 is fixedly connected to a hanging hole 5 of a handle I4 in the half cutter IA, and the right end of the torsion spring 2 is in sliding connection with the inner surface of a handle II 9 in the half cutter IIB.

The length H1 of the half knife I A is 160-200mm, the length H2 of the half knife II B is 135-175mm, the length S1 from the axis of the pin shaft 1 to the lower end of the knife handle I4 in the half knife I A is 95-125mm, the thickness d1 of the upper part of the knife handle II 9 in the half knife II B is 0.8-2mm, the width S2 of the lower part of the knife handle II 9 in the half knife II B is 7-12mm, and the thickness d2 is 1.5-4mm.

The mathematical expression of the bionic curve C is as follows:

y＝0.0011x ⁴ -0.0336x ³ +0.3754x ² +2.5962x-3.9563

wherein: x is more than or equal to 1 and less than or equal to 20.

The mathematical expression of the curve D is:

y＝0.0186x ³ -0.2908x ² -9.619x+12.369

wherein: x is more than or equal to 12 and less than or equal to 4.

The bionic gardening scissors are designed by applying the principle of bionics, adopting a reverse engineering technology, taking the bamboo rat incisors with typical characteristics as bionic prototypes, analyzing and researching the structures and the occlusion modes of the bamboo rat incisors to obtain the characteristic mechanism of low power consumption, low resistance and low abrasion in the process of cutting food, and utilizing the curve characteristics of the bamboo rat incisors.

Compared with the existing garden shears in the market, the bionic garden shears have the advantages of lower cutting resistance, higher cutting efficiency, better sharpness, capability of cutting tough plants once, good wear resistance and longer service life.

Drawings

FIG. 1 is a schematic view of a bionic gardening scissors

FIG. 2 is a schematic view of the structure of the half knife I

FIG. 3 is a dimension marking of half knife I

FIG. 4 is a rear view of the half knife II

FIG. 5 is a partial enlarged view of the view indicated by a in FIG. 1

FIG. 6 is a partial enlarged view of the view b in FIG. 1

FIG. 7 is a view of the blade curve indicated by C in FIG. 4

FIG. 8 is a back curve indicated by D in FIG. 4

Wherein: A. half cutter IB, half cutter II 1, pin shaft 2, torsion spring 3, blade 4, cutter handle I5, hanging hole 6, middle hole I7, cutter head I8, cutter back 9, cutter handle II 10, middle hole II 11, cutter head II

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in figures 1, 2 and 4, the invention consists of a half cutter IA, a half cutter IIB, a pin shaft 1 and a torsion spring 2, wherein the half cutter IA consists of a cutter head I7 and a cutter handle I4, a middle hole I6 is arranged at the joint of the cutter head I7 and the cutter handle I4, and a hanging hole 5 is arranged at the near lower end of the cutter handle I4; the joint of the cutter head I7 and the cutter handle I4 is in smooth transition; the half cutter II B consists of a cutter head II 11 and a cutter handle II 9, and a middle hole II 10 is formed in the joint of the cutter head II 11 and the cutter handle II 9; the joint of the cutter head II 11 and the cutter handle II 9 is in smooth transition; the cutter head I7 and the cutter head II 11 have the same structure and opposite directions; the inner surfaces of the cutter head I7 and the cutter head II 11 are provided with cutting edges 3, and the outer surfaces of the cutter head I7 and the cutter head II 11 are provided with cutter backs 8; the contour line of the blade 3 is a bionic curve C of a cd section, and the contour line of the back 8 is a curve D of an ef section; the connection line of the upper ends of the bionic curve C and the bionic curve D is a cf section straight line E, and the length of the straight line E is 0.6-1.8mm; the middle parts of the half knife I A and the half knife II B are movably connected through a pin shaft 1; the left end of the torsion spring 2 is fixedly connected to a hanging hole 5 of a handle I4 in the half cutter IA, and the right end of the torsion spring 2 is in sliding connection with the inner surface of a handle II 9 in the half cutter IIB.

As shown in fig. 3, 5 and 6, the length H1 of the half knife ia is 182mm, the length H2 of the half knife ii B is 142mm, the length S1 from the axis of the pin 1 to the lower end of the handle i 4 in the half knife ia is 111.5mm, the thickness d1 of the upper part of the handle ii 9 in the half knife ii B is 1.2mm, the width S2 of the lower part of the handle ii 9 in the half knife ii B is 9mm, and the thickness d2 is 2mm.

As shown in fig. 7, the mathematical expression of the blade-fitting curve C is:y＝0.0011x ⁴ -0.0336x ³ +0.3754x ² +2.5962x-3.9563, wherein: x is more than or equal to 1 and less than or equal to 20.

As shown in fig. 8, the mathematical expression of the blade-fitting curve D is: y=0.0186 x ³ -0.2908x ² -9.619x+12.369, wherein: x is more than or equal to 12 and less than or equal to 4.

Claims

1. A bionic gardening scissors, characterized in that: the novel cutter comprises a half cutter I (A), a half cutter II (B), a pin shaft (1) and a torsion spring (2), wherein the half cutter I (A) comprises a cutter head I (7) and a cutter handle I (4), a middle hole I (6) is formed in the joint of the cutter head I (7) and the cutter handle I (4), and a hanging hole (5) is formed in the lower end of the cutter handle I (4); the joint of the cutter head I (7) and the cutter handle I (4) is in smooth transition; the half cutter II (B) consists of a cutter head II (11) and a cutter handle II (9), and a middle hole II (10) is formed at the joint of the cutter head II (11) and the cutter handle II (9); the joint of the cutter head II (11) and the cutter handle II (9) is in smooth transition; the cutter head I (7) and the cutter head II (11) have the same structure and opposite directions; the inner surfaces of the cutter head I (7) and the cutter head II (11) are blades (3), and the outer surfaces of the cutter head I (7) and the cutter head II (11) are backs of knives (8); the contour line of the blade (3) is a bionic curve C of a cd section, and the contour line of the back (8) is a curve D of an ef section; the connection line of the upper ends of the bionic curve C and the bionic curve D is a cf section straight line E, and the length of the straight line E is 0.6-1.8mm;

the left end of the torsion spring (2) is fixedly connected with a hanging hole (5) of a knife handle I (4) in a half knife I (A), and the right end of the torsion spring (2) is in sliding connection with the inner face of a knife handle II (9) in a half knife II (B); the length H1 of the half knife I (A) is 160-200mm, the length H2 of the half knife II (B) is 135-175mm, the length S1 from the axis of the pin shaft (1) to the lower end of the knife handle I (4) in the half knife I (A) is 95-125mm, the thickness d1 of the upper part of the knife handle II (9) in the half knife II (B) is 0.8-2mm, the width S2 of the lower part of the knife handle II (9) in the half knife II (B) is 7-12mm, and the thickness d2 is 1.5-4mm;

the mathematical expression of the bionic curve C is as follows:

y = 0.0011x ⁴ - 0.0336x ³ + 0.3754x ² + 2.5962x - 3.9563

wherein: x is more than or equal to 1 and less than or equal to 20;

the mathematical expression of the curve D is:

y = 0.0186x ³ - 0.2908x ² - 9.619x + 12.369

wherein: x is more than or equal to 12 and less than or equal to 4.