CN203708890U - Anti-clamping pressurization scissors - Google Patents

Abstract

The utility model relates to a shearing tool, in particular to a pair of anti-clamping pressurization scissors, namely, two crossed levers which are hinged together through a hinge pin. Two blades (2) are arranged in front of the hinge pin (5), and two cutter bars (3) are arranged behind the hinge pin (5). The anti-clamping pressurization scissors are characterized in that an anti-clamping device (6) for preventing blade edges of the two blades (2) from clamping each other is arranged on at least one of the two cutter bars (3). The anti-clamping pressurization scissors have the advantages that the anti-clamping device has a forced guiding effect on the blades and can prevent the two blades of the scissors from clamping each other, and therefore the hinge pin is allowed to get close to the blade edges, and in other words, the resisting arms of the levers are shortened; the labor saving effect is obvious, and the anti-clamping pressurization scissors are suitable for various types of shearing work such as fruit tree pruning where the radiuses of cut objects are large and the labor intensity is high.

Description

Anti-sticking supercharging scissors

Technical field

The utility model relates to a kind of cutting implement, i.e. a kind of anti-sticking supercharging scissors.

Background technology

Existing scissors is to be made up of the lever of two intersections, has a bearing pin on crosspoint, and two sections of lever resistance arms before bearing pin are two blades, and two sections of lever moving arms are two knife bars after bearing pin.Known according to lever principle, material to be cut is more closely more laborsaving apart from bearing pin.Therefore the bearing pin that we wish scissors is as far as possible near cut point., the distance of bearing pin and cut point is too little, there will be blade mutually to block the problem of stinging.For example: two blades of fruit tree lopping shears, one is the snip cutting, another is the anvil sheet of support fixing material to be cut.In order to obtain larger shear pressure, snip must be very thin, and the inner side of snip must be very flat, and in order to ensure the intensity of snip, snip again must be not only thick but also wide.Therefore, the outside of snip must be an inclined-plane.From force analysis, in the time shearing, the inclined-plane in snip outside is subject to an inside lateral thrust.This thrust both can make snip rely on anvil sheet, was beneficial to shearing, but also can make snip and anvil sheet mutually block and sting.For retaining the advantage of lateral thrust, avoid its shortcoming, prevent that blade from mutually blocking and stinging, between the pin shaft hole on blade and the cut point of blade, need to keep larger distance, make pin shaft hole have larger guide surface around.Taking the fruit tree lopping shears of one-handed performance as example, the minimum range of the edge of its axis hole and knife edge line or its extended line is 6-10 millimeter.Although this distance can avoid snip and anvil sheet mutually to block and sting, and also makes the application point of cutting force move simultaneously, has been equivalent to lengthen the length of lever resistance arm, make operation effort more outward.

Summary of the invention

The purpose of this utility model is to provide one can prevent that blade card stings, again labour-saving anti-sticking supercharging scissors relatively.

Above-mentioned purpose is realized by following technical scheme: develop a kind of anti-sticking supercharging scissors, comprise two intersections and pass through pin hinge lever, before bearing pin, be two blades, bearing pin is two knife bars later, is characterized in: described two knife bars have at least one to install and prevent that the cutting edge of two blades from blocking the antiseize device of stinging mutually.

Described antiseize device is a kind of pressing plate, and pressing plate is connected mutually with a knife bar, and is pressed in a side of another knife bar and/or blade.

Described pressing plate is connected mutually by slide-bar and a knife bar, and another knife bar or blade are provided with chute, and slide-bar is placed in chute and is slidably matched with chute, and the inner side of pressing plate is pressed in the outside of another knife bar and/or blade.

Described chute is the arcuation slotted hole as the center of circle taking the bearing pin axle center in two lever crosspoints, and slide-bar is through chute, and slide-bar is inner to be connected mutually with a knife bar or blade, the slide-bar outer end pressing plate that is connected, pressing plate is strip, and its width is greater than the diameter of slide-bar, and its length is extended to the knife back one side of institute's pushing broach.

Described pressing plate is the guide plate that is connected in a knife bar top, and guide plate extends and ride over the side of another knife bar to the direction of another knife bar.

Described pressing plate is provided in a side of the tail end of a knife bar and stretches to the elongated slot of another knife bar, and the tail end of another knife bar is placed in elongated slot and is slidably matched with elongated slot.

The be connected plate of a strip of the tail end of described another knife bar, plate and described elongated slot are slidably matched.

Described scissors is fruit tree lopping shears, one of them blade is snip, another is anvil sheet, distance between the extension line of the border line of the bearing pin axis hole on snip and the blade border line of blade or blade border line is less than 3 millimeters, and the distance between the axis hole outer edge line on anvil sheet and the edge line of anvil sheet blade is less than 3 millimeters.

The internal orifice of described anvil sheet is provided with protruding canine tooth, and the height of canine tooth is greater than 3 millimeters.

The beneficial effects of the utility model are: antiseize device blade has forced guiding effect, can avoid two blades of scissors mutually to block the phenomenon of stinging, thereby allow bearing pin and blade to approach, being equivalent to lever resistance arm shortens, labor-saving effect is remarkable, is suitable for fruit tree pruning and waits that material to be cut radius is large, more much higher kind of shearing work of intensity.

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

Fig. 1 is the front view of the first embodiment;

Fig. 2 is the front view of the parts blade knife bar of the first embodiment;

Fig. 3 is the left view of the parts blade knife bar of the first embodiment;

Fig. 4 is the front view of another blade knife bar of parts of the first embodiment;

Fig. 5 is the left view of another blade knife bar of parts of the first embodiment;

Fig. 6 is the front view of the second embodiment;

Fig. 7 is the parts snip of the second embodiment and the front view of knife bar;

Fig. 8 is the parts snip of the second embodiment and the left view of knife bar;

Fig. 9 is the front view of the third embodiment;

Figure 10 is the parts snip of the third embodiment and the front view of knife bar;

Figure 11 is the parts snip of the third embodiment and the left view of knife bar;

Figure 12 is the front view of the 4th kind of embodiment;

Figure 13 is the vertical view of the 4th kind of embodiment.

Visible in figure: scissors 1, blade 2, knife bar 3, spring 4, bearing pin 5, antiseize device 6, pressing plate 7, slide-bar 8, chute 9, snip 10, anvil sheet 11, canine tooth 12, guide plate 13, elongated slot 14, plate 15.

Embodiment

The total design of the utility model is: in the middle of two levers of scissors, be provided with the cut direction that can control blade, avoid blade mutually to block the antiseize device of stinging, the while near scissors blades, shortens lever small end length scissors bearing pin, reaches labour-saving object.Introduce by reference to the accompanying drawings three kinds of embodiment around this design below.

The first embodiment: Fig. 1 has introduced a kind of anti-sticking supercharging scissors, and this scissors 1 also has the lever of two intersections, contacts by bearing pin 5.Bearing pin 5 leading portions are blade 2, and back segment is two knife bars 3, also have return spring 4 between knife bar 3.Be characterized in: two knife bars 3 have at least one to install and prevent that the cutting edge of two blades 2 from blocking the antiseize device 6 of stinging mutually.Obviously, this antiseize device 6 has multiple, as long as can be at scissors bearing pin under the prerequisite near blade, the medial surface that two blades are relative in the time shearing remains and is adjacent to and parallel motion state, all belongs to this antiseize device 6.The simplest antiseize device 6 is a kind of pressing plates 7, and pressing plate 7 is connected mutually with a knife bar 3, and is pressed in a side of another knife bar 3 and/or blade 2.Visible in conjunction with Fig. 2 Fig. 3 Fig. 3 Fig. 4 Fig. 5: pressing plate 7 is to be connected mutually by a slide-bar 8 and a knife bar 3, another knife bar 3 or blade 2 are provided with chute 9, slide-bar 8 is placed in chute 9 and is slidably matched with chute 9, and the inner side of pressing plate 7 is pressed in the outside of another knife bar 3 or blade 2.Gap between the pressing plate 7 here and fixing knife bar 3 is accurate being slidably matched with the knife bar 3 of pressing or blade 2.Be preferably on pressing plate 7 and offer screw, match with the screw thread on slide-bar 8, then lock with the bulb of fritillary, can adjust as required the thrust of pressing plate 7.

When work, two knife bars 3 come closer, and slide-bar 8 is along with in the interior movement of chute 9, pressing plate 7 is pressed in the outside of another blade 2 always, the inner side of two blades is close to and parallel friction all the time, and the cutting edge that so just can ensure two blades 2 can not block to be stung, thereby obtains best shear effect.

The second embodiment: as shown in Figure 6, scissors 1 is a kind of fruit tree lopping shears, and one of them blade 2 is snips 10, and another is anvil sheet 11.Beeline between the border line of bearing pin 5 axis holes on snip 10 and the extension line of the blade border line of blade 2 or blade border line is less than 3 millimeters, and the axis hole outer edge line on same anvil sheet 11 and the beeline between the outer edge line of anvil sheet 11 blades are less than 3 millimeters.The hole wall of bearing pin axis hole can be pressed close to blade in other words, even can exceed blade, occurs certain breach.This fulcrum that is just equivalent to lever is to small end one side shifting, and the length ratio of large end will increase thereupon, and the active force of large end just can reduce, and has also just reached laborsaving object.In addition, the root of snip 10 and anvil sheet 11 all adopts curved edge, and larger-diameter fruit branch also can arrive its root.In order to strengthen fixing to fruit branch, on the internal orifice of anvil sheet 11, be provided with protruding canine tooth 12, the height of canine tooth 12 is greater than 3 millimeters.

It is to have adopted the antiseize device 6 being made up of pressing plate 7, slide-bar 8 and chute 9 that bearing pin reach cutting edge does not but block the reason of stinging.Visible in conjunction with Fig. 7 Fig. 8, chute 9 is the arcuation slotted holes as the center of circle taking the axle center of scissors bearing pin 5, slide-bar 8 is slidably matched with chute 9, slide-bar 8 is inner to be connected mutually with a knife bar 3 or blade 2, the slide-bar 8 outer ends pressing plate 7 that is connected, pressing plate 7 be strip, its width is greater than the diameter of slide-bar 8, medial surface is pressed in the outside of another blade 2, and the length of pressing plate 7 is extended to the knife back one side of institute's pushing broach 2.

When work, when two knife bars 3 come closer, slide-bar 8 is in the interior movement of chute 9, pressing plate 7 is pressed in the outside of another blade 2 always, because pressing plate 7 is longer, the knife back of blade 2 can not be lifted, the inner side of two blades is close to all the time and is parallel to each other, so just can better prevent that the card of two blade cutting edges stings, thereby obtain laborsaving shear effect fast.

The third embodiment: as shown in Figure 9, the antiseize device 6 of this fruit tree pruning shear is also a kind of pressing plate 7, and but, form and the precedent of pressing plate 7 make a variation to some extent.Visible in conjunction with Figure 10 Figure 11: pressing plate 7 is to be connected in a guide plate 13 on snip 10 knife bar tops, guide plate 13 extends and rides over the side of another knife bar to the direction of another knife bar.When work, guide plate 13 is subject to the extruding of another knife bar 3, produces a kind ofly to limit the moment that snip 10 wanders off, thereby avoids snip 10 and the card of anvil sheet 11 to sting.

The 4th kind of embodiment: as shown in Figure 13 Figure 14, the antiseize device of this fruit tree pruning shear is that the tail end of a knife bar is provided with the elongated slot 14 that stretches to another knife bar, the tail end of another knife bar is placed in elongated slot 14 and is slidably matched with elongated slot 14.Wherein, the tail end that is preferably in another knife bar strip plate 15 that is connected, plate 15 is slidably matched with the elongated slot 14 of another knife bar tail end.When work, be subject to the constraint of plate 15 and elongated slot 14, snip 10 and anvil sheet 11 above can not wander off, and also just card can not occur and sting.

Claims (9)

1. an anti-sticking supercharging scissors, comprise two intersections and pass through pin hinge lever, before bearing pin, be two blades (2), bearing pin is two knife bars (3) later, it is characterized in that: described two knife bars (3) have at least one to install and prevent that the cutting edge of two blades (2) from blocking the antiseize device (6) of stinging mutually.

2. anti-sticking supercharging scissors according to claim 1, it is characterized in that: described antiseize device (6) is a kind of pressing plate (7), pressing plate (7) is connected mutually with a knife bar (3), and is pressed in a side of another knife bar (3) and/or blade (2).

3. anti-sticking supercharging scissors according to claim 2, it is characterized in that: described pressing plate (7) is connected mutually by slide-bar (8) and a knife bar (3), another knife bar (3) or blade (2) are provided with chute (9), slide-bar (8) is placed in chute (9) and is slidably matched with chute (9), and the inner side of pressing plate (7) is pressed in the outside of another knife bar (3) and/or blade (2).

4. anti-sticking supercharging scissors according to claim 3, it is characterized in that: described chute (9) is the arcuation slotted hole as the center of circle taking bearing pin (5) axle center in two lever crosspoints, slide-bar (8) is through chute (9), slide-bar (8) is inner to be connected mutually with a knife bar (3) or blade (2), slide-bar (8) the outer end pressing plate (7) that is connected, pressing plate (7) is strip, its width is greater than the diameter of slide-bar (8), and its length is extended to the knife back one side of institute's pushing broach (2).

5. anti-sticking supercharging scissors according to claim 2, it is characterized in that: described pressing plate (7) is the guide plate (13) that is connected in a knife bar (3) top, guide plate (13) extends and rides over the side of another knife bar (3) to the direction of another knife bar (2).

6. anti-sticking supercharging scissors according to claim 2, it is characterized in that: described pressing plate (7) is provided in a side of the tail end of a knife bar (3) and stretches to the elongated slot (14) of another knife bar (3), the tail end of another knife bar (3) is placed in elongated slot (14) and is slidably matched with elongated slot (14).

7. anti-sticking supercharging scissors according to claim 6, it is characterized in that: the be connected plate (15) of a strip of the tail end of described another knife bar (3), plate (15) is slidably matched with described elongated slot (14).

8. anti-sticking supercharging scissors according to claim 1, it is characterized in that: described scissors (1) is fruit tree lopping shears, one of them blade (2) is snip (1), another is anvil sheet (11), distance between border line and the blade border line of blade (2) or the extension line of blade border line of bearing pin (5) axis hole on snip (1) is less than 3 millimeters, and the distance between the axis hole outer edge line on anvil sheet (11) and the edge line of anvil sheet (11) blade is less than 3 millimeters.

9. anti-sticking supercharging scissors according to claim 8, is characterized in that: the internal orifice of said anvil sheet (11) is provided with protruding canine tooth (12), the height of canine tooth (12) is greater than 3 millimeters.