CN201018792Y

CN201018792Y - Fruit tree pruning shear blade

Info

Publication number: CN201018792Y
Application number: CNU2007200104519U
Authority: CN
Inventors: 腾建军
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-02-02
Filing date: 2007-02-02
Publication date: 2008-02-13
Anticipated expiration: 2017-02-02

Abstract

The utility model relates to a gardening tool part which is a pruning shears blade for fruiters. The blade comprises a blade back <1>, an edge <2>, an outer lateral surface <3>, an internal surface <6>, and an axes hole <5>. The difference is that the internal surface of the blade is formed by butting at lest two surfaces. One is a friction surface <7> near the blade back; anther is an equilibrium surface <8> near the edge. The joint of the two surfaces form an outer convex obtuse angle. Since the internal blade is provided with the equilibrium surface <8>, the fruiter pruning shears adopting the above scheme can conquer the inward pressure on the outer blade; prevent the blade to bite with the anvil tablets. The utility model supports the condition that the shaft location moves to the blade instead of the guiding function of the blade internal surface around the shaft. Compared with the prior art, the distance of cut pressure point of the shear and shaft is very near, which is equivalent to shorten the lever resistance arm. The utility model has obviously save labor effect and higher property of the fruit pruning shear.

Description

Fruit tree shrub and hedge trimmer blade

Technical field the utility model relates to a kind of garden tool set parts, i.e. a planting fruit-trees pruner sheet.

The existing fruit tree shrub and hedge trimmer of background technology are that the lever by two intersections constitutes, and are a rotating shaft on the crosspoint, and two sections lever resistance arms of rotating shaft front have one to be blade, and one is the anvil sheet.The force arm of two sections levers of rotating shaft back is two handles.Spring is housed between the handle.By mechanics general knowledge as can be known, during the scissors cut branch, blade and anvil sheet to the pressure spot of branch the closer to fulcrum, just laborsaving more the closer to rotating shaft, therefore, should shorten the distance of rotating shaft to blade as far as possible., the distance of rotating shaft and blade is near more, and the guide effect of blade and anvil sheet medial surface is just more little, and the easy more mutual card of blade and anvil sheet is stung.

The summary of the invention the purpose of this utility model provides a kind of both laborsaving, can prevent the fruit tree shrub and hedge trimmer blade that blade and anvil sheet card are stung again.

Above-mentioned purpose is realized by following technical scheme: developing a planting fruit-trees pruner sheet, also is to be made of the knife back, blade, lateral surface, medial surface, axis hole etc.Different is: the medial surface of said blade is formed by two face butt joints at least, and one is near knife back rubbing surface on one side, and another is that the two sides joint forms the obtuse angle of an evagination near blade balanced surface on one side.

Said balanced surface is to be an outer peripheral tapered plane with the blade border line on the medial surface of blade.

Said balanced surface is to be an outer peripheral curved surface with the blade border line on the medial surface of blade.

Adopt the fruit tree shrub and hedge trimmer blade of such scheme, because the inboard is provided with balanced surface, can overcome the pressure in the blade lateral, effectively prevented the phenomenon that blade and anvil sheet card are stung, thereby allow rotating shaft and blade approaching, thus make shearing point move a segment distance to rotor shaft direction, be equivalent to shorten the resistance arm of lever, the labor-saving effect is very obvious, adopts the performance of the fruit tree pruner that this blade makes to significantly improve.

Description of drawings concrete structure of the present utility model is referring to the following drawings.

Fig. 1 is the front view of a kind of embodiment;

Fig. 2 is the rearview of a kind of embodiment;

Fig. 3 is a kind of cross section of this embodiment;

Fig. 4 is the another kind of cross section of this embodiment;

Fig. 5 is the blade work force diagram of existing product;

Fig. 6 is the blade work force diagram of this embodiment;

Fig. 7 is a kind of user mode schematic diagram of this embodiment;

Fig. 8 is the another kind of user mode schematic diagram of this embodiment.

Among the figure as seen: the knife back 1, blade 2, lateral surface 3, outer inclined-plane 4, shaft hole 5, medial surface 6, rubbing surface 7, balanced surface 8, anvil sheet 9, spring 10 is cut handle 11.

Embodiment is introduced an embodiment below in conjunction with accompanying drawing.

Shown in Fig. 1,2,3,4, this planting fruit-trees pruner sheet also is by the knife back (1), blade (2), lateral surface (3), medial surface (6), axis hole formations such as (5), and an outer inclined-plane (6) is also arranged on the lateral surface of blade (3).The difference of this blade and existing blade is: shown in Fig. 2,3, its medial surface (6) is not a plane, but is formed by a rubbing surface (7) and a balanced surface (8) butt joint.Said rubbing surface (7) is exactly most of plane of original medial surface, and balanced surface (8) then is to be an outer peripheral inclined-plane with blade (2).As seen from Figure 3, the angle of balanced surface (8) and rubbing surface (7) is the obtuse angle alpha that protrude in the outside, an inside side on the cross section of blade.

The form of balanced surface (8) can have multiple, can be plane shown in Figure 3, curved surface that also can be as shown in Figure 4.Its length both can occupy the whole of blade as shown in Figure 2, also can only occupy the part of blade.The effect of this balanced surface (8) is that the card that prevents blade and anvil sheet (9) is stung.Its operation principle is as follows:

Stressing conditions when Fig. 5 has illustrated original blade cuts operation.As seen, when the blade cuts branch, lateral surface is to the directed force F of the branch direction along lateral surface (4), and F can be decomposed into the power F perpendicular to the branch axis ₁With the parallel and power F branch axis ₂, F ₂Will push blade to the inside, cause the card of blade and anvil sheet (9) to sting.

Stressing conditions when Fig. 6 has illustrated the blade cuts operation of present embodiment.As seen, the side force F that the balanced surface (8) of blade inboard produces when the cutting branch ₃, also be a power parallel with the branch axis, and and F ₂Direction is opposite, can offset F ₂, thereby played the effect that prevents that blade and the mutual card of anvil sheet (9) are stung.

On other cutter, also can see the blade of this double-sided blade, on scissors, also never had.Because it is straight that traditional scissors requires that the medial surface of two blades tries one's best, it is close that two edge lines should be tried one's best, and present embodiment is divided into two planes to the medial surface of blade, and make between the cutting edge of blade and anvil sheet (9) and the gap occurred.Though this gap occurred certain negative effect is arranged, brought bigger advantage.We know, it is to strengthen contact-making surface, particularly rotating shaft the place ahead blade around the rotating shaft and the contact-making surface of anvil sheet inboard that conventional scissors overcomes method that blade and anvil sheet card sting, thereby produces enough guiding forces, overcomes the thrust in the blade outside, prevent in the blade partially., have bigger contact-making surface, just necessarily require to have bigger distance between blade and the rotating shaft, also will inevitably make the crossing of two blades and, promptly strengthen the resistance arm of lever, cause effort the reach of the pressure spot of material to be cut.The pressure F that present embodiment uses the inclined-plane of blade one side to produce ₃Offset the pressure F in the outside ₂Substituted around the original rotating shaft, the particularly guide effect of rotating shaft the place ahead contact-making surface, therefore, the position of rotating shaft just can be to blade (2) lateroprotrusion, thereby make the crossing of blade and anvil sheet cutting edge and approaching, equaled to shorten the resistance arm of lever, reached the labour-saving purpose the pressure spot and the rotating shaft of material to be cut.Simultaneously, because material to be cut fruit tree branch has higher intensity, the gap that is produced between blade and the anvil sheet cutting edge, very small to the influence of shear effect, can ignore fully.

Fig. 7 has introduced a kind of user mode of present embodiment, as seen from the figure, with this blade and anvil sheet (9), spring (10) with cut the scissors that handle (11) is formed, its rotating shaft (5) is near blade (2), thereby to the pressure spot of branch move on to after also rotating shaft near, the labor-saving effect highly significant.

Fig. 8 introduction be another fruittree shear, also adopted said structure, can improve transaction capabilities equally, illustrate that this blade can adapt to multiple fruit tree and gardening trimming tool.

Claims

1. a planting fruit-trees pruner sheet, be by the knife back (1), blade (2), lateral surface (3), medial surface (6), axis hole formations such as (5), it is characterized in that: the medial surface of said blade (6) is formed by two face butt joints at least, one is near the knife back (1) rubbing surface (7) on one side, another is that the two sides joint forms the obtuse angle alpha of an evagination near blade balanced surface (8) on one side.

2. fruit tree shrub and hedge trimmer blade according to claim 1 is characterized in that: said balanced surface (8) is that the medial surface (6) at blade is an outer peripheral tapered plane with the blade border line upward.

3. fruit tree shrub and hedge trimmer blade according to claim 1 is characterized in that: said balanced surface (8) is that the medial surface (6) at blade is an outer peripheral curved surface with the blade border line upward.