CN109302905B - A kind of bionic gardening scissors - Google Patents

Abstract

A kind of bionic gardening scissors belongs to the technical field of gardening tools. In the present invention, the upper inner side of half knife I and half knife II is a blade, and the blade has a bionic curve structure, and the upper outer side of half knife I and half knife II has a bionic curve The back of the knife, the lower part of the half knife I is the handle and the torsion spring installation through hole and the torsion spring is installed, the back of the knife and the lower handle are smoothly connected by an arc; the invention applies the bionic curve of the bamboo rat incisors to the blade structure of the gardening scissors, and the design A kind of bionic gardening scissors has been developed. Compared with the existing gardening scissors on the market, it has lower cutting resistance, higher cutting efficiency, and better sharpness during the cutting operation. It can cut tough plants at one time, and has good wear resistance. Longer life.

Description

A kind of bionic gardening scissors

technical field

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

Background technique

Gardening scissors are easy to operate and easy to carry, and are one of the necessary tools for gardeners to perform gardening operations.

The existing gardening scissors on the market have the following problems: when the same gardening scissors prunes different types of plants, the cutting edge is easily damaged, has poor wear resistance, and has a short service life; when pruning tough plants, the efficiency is low and the sharpness is not enough. The above cuts can cut the plants off. Therefore, strong wear resistance, good sharpness, high cutting efficiency and long service life are the development direction of gardening scissors in the future.

In the past, most studies started with the force arm, material and overall structure of gardening scissors to improve the wear resistance and sharpness of gardening scissors, thereby improving work efficiency and increasing service life. There are very few studies on the structural design of gardening scissors blades, especially the application of bionic principles to the structural design of gardening scissors blades. The design and manufacture of existing gardening scissors needs to be improved and perfected, and it is urgent to explore new methods and theories of gardening scissors design and manufacture. On the basis of the existing design and manufacturing methods of gardening scissors, using bionic principles to design a new type of wear-resistant and sharp bionic gardening scissors to improve its operating efficiency and service life has very important theoretical significance and development of gardening scissors technology and landscaping industry. Practical significance.

The bamboo rat is named after eating bamboo. Its incisors are thick, with an optimized geometric structure and excellent mechanical properties. During the feeding process, the incisors have high cutting efficiency and low cutting resistance. Therefore, the bionic curve of the bamboo rat incisors is applied Based on the design of the blade structure of gardening scissors, the geometric structure and mechanical properties of gardening scissors are optimized, and a new type of bionic gardening scissors is designed.

Contents of the invention

The purpose of the present invention is to solve the shortcomings of the existing gardening scissors on the market, and provide a bionic gardening scissors with strong wear resistance, good sharpness, high operating efficiency and long service life.

The present invention is made up of half knife IA, half knife IIB, pin shaft 1 and torsion spring 2, wherein half knife IA is made up of cutter head I7 and knife handle I4, and the junction of knife head I7 and knife handle I4 is provided with middle hole I6, and the knife A hanging hole 5 is provided near the lower end of the handle I4; the junction between the cutter head I7 and the handle I4 is smoothly transitioned.

The half knife IIB is composed of the cutter head II11 and the handle II9, and the middle hole II10 is provided at the junction of the cutter head II11 and the handle II9; the transition between the cutter head II11 and the handle II9 is smooth.

The structure of the cutter head I7 and the cutter head II11 is the same, and the direction is opposite; the inner surface of the cutter head I7 and the cutter head II11 is the blade 3, and the outer surface of the cutter head I7 and the cutter head II11 is the blade back 8; the outline of the blade 3 is the bionic of the cd segment Curve C and the outline of the blade back 8 are the curve D of the ef section; the line connecting the upper end of the bionic curve C and the curve D is the straight line E of the cf section, and the length of the straight line E is 0.6-1.8mm.

Half cutter IA and half cutter IIB are connected flexibly through pin shaft 1 in the middle.

The left end of torsion spring 2 is affixed to the hanging hole 5 of handle of a knife Ⅰ4 in half knife IA, and the right-hand side of torsion spring 2 is slidably connected with the inner surface of handle of a knife II 9 in half knife IIB.

The length H1 of the half knife IA is 160-200mm, the length H2 of the half knife IIB is 135-175mm, the length S1 from the axis of the pin shaft 1 to the lower end of the handle Ⅰ4 in the half knife IA is 95-125mm, and the length S1 of the middle knife handle of the half knife IIB is 95-125mm. The thickness d1 of the upper part of II9 is 0.8-2mm, the width S2 of the lower part of the handle II9 in the half knife IIB is 7-12mm, and the thickness d2 is 1.5-4mm.

The mathematical expression of the bionic curve C is:

y＝ ^{0.0011x4-0.0336x3 + 0.3754x2} +2.5962x-3.9563

Where: 1≤x≤20.

The mathematical expression of the curve D is:

y ^{＝ 0.0186x3-0.2908x2-9.619x} +12.369

Where: -12≤x≤4.

The invention uses the principle of bionics, adopts reverse engineering technology, takes the bamboo rat incisors with typical characteristics as the bionic prototype, and analyzes and studies the structure and occlusal mode of the bamboo rat incisors to obtain its low power consumption and low resistance in the process of cutting food. Based on the characteristic mechanism of low wear and tear, and using the curve characteristics of bamboo rat incisors, a bionic gardening scissors is designed.

Compared with the existing gardening scissors on the market, the bionic gardening scissors of the present invention have lower cutting resistance, higher cutting efficiency, better sharpness, can cut tough plants at one time, and have good wear resistance. Longer life.

Description of drawings

Figure 1 is a schematic diagram of the structure of bionic gardening scissors

Figure 2 is a schematic diagram of the structure of half knife Ⅰ

Figure 3 is the size marking diagram of the half knife Ⅰ

Figure 4 is the rear view of Half Knife II

Figure 5 is a partial enlarged view indicated by a in Figure 1

Figure 6 is a partial enlarged view indicated by b in Figure 1

Figure 7 is the blade curve indicated by C in Figure 4

Figure 8 is the back curve indicated by D in Figure 4

Among them: A. Half knife Ⅰ B. Half knife Ⅱ 1. Pin shaft 2. Torsion spring 3. Blade 4. Knife handle Ⅰ 5. Hanging hole 6. Middle hole Ⅰ 7. Knife head Ⅰ 8. Knife back 9. Knife handle Ⅱ 10. Middle hole Ⅱ 11. Cutter head Ⅱ

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Fig. 1, Fig. 2, Fig. 4, the present invention is made up of half cutter IA, half cutter IIB, bearing pin 1 and torsion spring 2, and wherein half cutter IA is made up of cutter head I7 and knife handle I4, cutter head I7 and There is a middle hole Ⅰ6 at the joint of the handle Ⅰ4, and a hanging hole 5 is provided near the lower end of the handle Ⅰ4; the transition between the knife head Ⅰ7 and the knife handle Ⅰ4 is smooth; the half-knife IIB is composed of the knife head Ⅱ11 and the knife handle Ⅱ9, and the knife head Ⅱ11 There is a middle hole II10 at the connection with the handle II9; the transition between the cutter head II11 and the handle II9 is smooth; the structure of the cutter head I7 and the cutter head II11 are the same, and the direction is opposite; the inner surface of the cutter head I7 and the cutter head II11 is the blade 3 , the outside of the cutter head I7 and cutter head II11 is the blade back 8; the outline of the blade 3 is the bionic curve C of the cd section, and the outline of the knife back 8 is the curve D of the ef section; the connection line between the bionic curve C and the upper end of the curve D is The straight line E of the cf section, the length of the straight line E is 0.6-1.8mm; the middle part of the half knife IA and the half knife II B is flexibly connected through the pin shaft 1; the left end of the torsion spring 2 is fixedly connected to the hanging hole 5 of the handle I4 in the half knife IA, twist The right-hand side of spring 2 is slidably connected with the inner surface of handle of a knife II 9 in the half knife II B.

As shown in Figure 3, Figure 5, and Figure 6, the length H1 of the half knife IA is 182mm, the length H2 of the half knife IIB is 142mm, and the length S1 from the axis of the pin shaft 1 to the lower end of the handle I4 in the half knife IA is 111.5mm , the thickness d1 of the upper part of the handle Ⅱ9 in the half-knife IIB is 1.2mm, the width S2 of the lower part of the handle Ⅱ9 in the half-knife IIB is 9mm, and the thickness d2 is 2mm.

As shown in Figure 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, where: 1≤x≤20.

As shown in FIG. 8 , the mathematical expression of the blade fitting curve D is: y=0.0186x ³ -0.2908x ² -9.619x+12.369, where: -12≤x≤4.

Claims (1)

1. A kind of bionic gardening scissors is characterized in that: it is made up of half cutter I (A), half cutter II (B), bearing pin (1) and torsion spring (2), wherein half cutter I (A) is made up of cutter head Ⅰ(7) and handle Ⅰ(4), the connection between the cutter head Ⅰ(7) and the handle Ⅰ(4) is provided with a middle hole Ⅰ(6), and the lower end of the handle Ⅰ(4) is provided with a hanging hole ( 5); the transition between the cutter head I (7) and the handle I (4) is smooth; the half cutter II (B) is composed of the cutter head II (11) and the handle II (9), and the cutter head II (11) and There is a middle hole II (10) at the junction of the handle II (9); a smooth transition at the junction of the cutter head II (11) and the handle II (9); the structure of the cutter head I (7) and the cutter head II (11) The same, opposite directions; the inner surface of the cutter head I (7) and the cutter head II (11) is the blade (3), and the outside of the cutter head I (7) and the cutter head II (11) is the knife back (8); the blade (3 ) is the bionic curve C of the cd section, and the contour line of the knife back (8) is the curve D of the ef section; the connection line between the bionic curve C and the upper end of the curve D is the cf section straight line E, and the length of the straight line E is 0.6-1.8 mm; The distribution pin shaft (1) in the middle of the half knife Ⅰ (A) and the half knife Ⅱ (B) is movably connected; The left end of torsion spring (2) is affixed to the hanging hole (5) of handle of a knife I (4) in half knife I (A), and the right end of torsion spring (2) is connected with handle of a knife II (9) in half knife II (B). ) is slidingly connected on the inner surface; the length H1 of the half knife I (A) is 160-200mm, the length H2 of the half knife II (B) is 135-175mm, and the axis of the pin shaft (1) reaches the middle knife of the half knife I (A). The length S1 of the lower end of the handle I (4) is 95-125 mm, the thickness d1 of the upper part of the handle II (9) in the half knife II (B) is 0.8-2 mm, the lower part of the handle II (9) in the half knife II (B) The width S2 is 7-12mm, and the thickness d2 is 1.5-4mm; The mathematical expression of the bionic curve C is: y = 0.0011x ⁴ - 0.0336x ³ + 0.3754x ² + 2.5962x - 3.9563 Among them: 1≤x≤20; The mathematical expression of the curve D is: y = 0.0186x ³ - 0.2908x ² - 9.619x + 12.369 Where: -12≤x≤4.