CN208196580U - Labor-saving plier - Google Patents

Abstract

The utility model relates to a kind of labor-saving pliers, it solves existing pliers shearing labor-saving effect to be restricted, workpiece below for maximum shear size, the poor defect in labor-saving effect, including the first caliper and the second caliper, it is connected between first caliper and the second caliper by connector, first caliper is fixedly connected with connector, second caliper is flexibly connected with connector, connector can be mobile relative to the second caliper, first caliper and the second caliper will form the imaginary axis of first caliper and the second caliper actual rotation when rotating around connector, the imaginary axis is in connector towards the position of binding clip.It is biased to the position of binding clip in the position of imaginary axis, also the distance between practical axis and the jaw shearing edge for just shortening the rotation of two calipers, also just shorten the arm of force, workpiece below for maximum shear size in this way, it can be closer to the initial position of shearing edge, to realize that labour-saving acts on.

Description

Labor-saving plier

Technical field

The utility model relates to a kind of cutting implement, especially a kind of labor-saving plier.

Background technique

Existing hand-operated tools, such as pliers generally include left caliper and right caliper body, pass through between left caliper and right caliper body Pivot is hinged, and right binding clip and left binding clip are respectively arranged on left caliper and right caliper body, by controlling left clamp handle and right clamp handle Folding is met clamping to realize left binding clip and right binding clip, completes workpiece shearing.

But existing pliers, the articulated position between left caliper and right caliper body immobilize, it is most short that this allows for pliers The shearing arm of force it is constant, the most short shearing arm of force can match a maximum shearing size, when shearing size reduction, shear the arm of force It will not change again, therefore the expansion effect of shearing force remains constant, that is to say, that the maximum for shearing above-mentioned is cut Size workpiece below is cut, existing pliers labour-saving effect is poor.

Summary of the invention

The utility model solves existing pliers shearing labor-saving effect and is restricted, below for maximum shear size Workpiece, the poor defect in labor-saving effect, provides a kind of labor-saving plier, and workpiece below for maximum shear size can equally play Labour-saving effect.

The utility model the specific technical proposal is: a kind of labor-saving plier, including the first caliper and the second caliper, the first caliper And second connected by connector between caliper, the first caliper is fixedly connected with connector, the second caliper and connector activity company It connects, connector can be mobile relative to the second caliper, and the first caliper and the second caliper will form one first when rotating around connector The imaginary axis of caliper and the second caliper actual rotation, the imaginary axis are in connector towards the position of binding clip.

The imaginary axis is an axis of illusion, primarily to practical constant position in two caliper rotation processes of explanation It sets, this position is exactly the position where imaginary axis, and connector is the component of a physical presence, in two caliper rotation processes, Position between connector and the first caliper immobilizes, but the position between the second caliper changes, this position It changes so that the first caliper and the axis of the second caliper actual rotation are in the position where imaginary axis.The position of imaginary axis It is biased to the position of binding clip, the distance between practical axis and jaw shearing edge of the rotation of two calipers is also just shortened, also just contracts The short arm of force, workpiece below for maximum shear size in this way can be closer to the initial position of shearing edge, thus real Existing labour-saving effect, the full-size that this maximum shear size not instead of pliers can be sheared, relative to showing for fixed rotation There is pliers, it can be close to the maximum shear size of shearing edge.

Preferably, imaginary axis is in binding clip close to the initial position of shearing edge.Imaginary axis is closer to shearing edge, then The arm of force reduce it is bigger, it is certainly also more labor-saving, but imaginary axis closer to shearing edge but also jaw open angle limited System.

Preferably, being provided with arc groove on the second caliper, the center of circle of arc groove is at the axis of imaginary axis.Two calipers Working method be to relatively rotate in fact, therefore arc groove is set, connector slides in arc groove, connects in this way on the second caliper Fitting is formed relative to the second caliper and is rotated.

Preferably, be provided with arc groove on the second caliper, connector has two parts, a part for on the first caliper The embedded portion that is mutually fixedly connected of link slot, second part is the sliding part being slidably connected with the arc groove on the second caliper.

Preferably, the shape of connector sliding part is non-rotating shape.Sliding part is non-rotating shape, such second pincers Body relatively rotating parts will not generate the case where original place rotation, avoid two jaws from closing up and required precision is not achieved.

Preferably, arc groove only has one section, sliding part only one, the arc-shaped shape of sliding part, sliding part has and circle The identical crooked radian of arc slot.

Preferably, arc groove is two sections, sliding part is two, the corresponding arc groove of a sliding part.

Preferably, being provided with block between two arc grooves, block separates two arc grooves, and the thickness of block is less than two circular arcs The axial length of slot simultaneously forms heavy portion between block and the surface of the second caliper, which is the second caliper far from the first caliper Surface.

Preferably, the end of two sliding parts has, interconnecting piece is connected, the arc-shaped shape of interconnecting piece, the thickness of interconnecting piece and heavy portion Thickness it is equal, interconnecting piece have crooked radian identical with arc groove.

Preferably, connector both ends form pier nose, and position limiting structure is formed in the axial direction.

The beneficial effects of the utility model are: the position of binding clip is biased in the position of imaginary axis, also just shortens two calipers and turn The distance between dynamic practical axis and jaw shearing edge, also just shorten the arm of force, in this way for maximum shear size below Workpiece, can closer to the initial position of shearing edge, thus realize labour-saving act on.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of the utility model；

Fig. 2 is the decomposition diagram of structure shown in the utility model Fig. 1；

Fig. 3 is the position view of sliding part when structure jaw shown in the utility model Fig. 1 closes up；

Fig. 4 is the position view that structure jaw shown in the utility model Fig. 1 opens beginning sliding part；

Fig. 5 is second of structural schematic diagram of the utility model；

Fig. 6 is the structural schematic diagram of connector used in structure in the utility model second；

Stress diagram when Fig. 7 is existing pliers shearing 3.4mm workpiece；

Stress diagram when Fig. 8 is the utility model shearing 3.4mm or less workpiece；

In figure: 1, right caliper body, 2, connector, 3, imaginary axis, 4, right binding clip, 5, left binding clip, 6, left caliper, 7, left clamp handle, 8, right clamp handle, 9, block, 10, arc groove, 11, sliding part, 12, embedded portion, 13, interconnecting piece, 14, inlaid hole, 15, pier nose.

Specific embodiment

Below by specific embodiment, and in conjunction with attached drawing, the utility model will be further described.

Embodiment 1: a kind of labor-saving plier (referring to Fig. 1 attached drawing 2), including left caliper 6 and right caliper body 1(are by left and right as shown in the figure Direction), it is connected between left caliper and right caliper body by connector 2.Left caliper includes left clamp handle 7 and right binding clip 4, right caliper body include Right clamp handle 8 and left binding clip 5.

On right caliper body setting there are two circular inlaid hole 14(referring to fig. 2), the end of inlaid hole is cone-shaped.Left caliper There are two arc groove 10, the position between two arc grooves is provided with block 9 for upper setting, and the thickness of block is less than the axial direction of arc groove Length, and heavy portion is formed between block and the surface of the second caliper, which is surface of second caliper far from the first caliper. Two arc grooves are connected in the position in heavy portion, and the portion that sinks is arc shape, and the radian in heavy portion is identical as the radian of two arc grooves, two arc grooves With the same center of circle, the center of circle is towards binding clip side.

Connector has two parts, the embedded portion 12 being respectively mutually fixedly connected with right caliper body and is flexibly connected with left caliper Sliding part 11, being embedded in portion is cylinder, and embedded portion is embedded into the inlaid hole of right caliper body, and cylinder extends to the position of arc groove It sets, and is connected to form interconnecting piece 13 between two cylindrical ends, the thickness of interconnecting piece is identical as the thickness in heavy portion, sliding part In arc groove, interconnecting piece is in heavy portion and across block, and interconnecting piece is in bending, the center of circle of curved two camber lines and The center of circle of arc groove coincides.After connector connection, the end for being embedded in portion forms the pier nose 15 of taper, the cone of pier nose and inlaid hole Shaped position matches, the axial limiting of pier nose and interconnecting piece formation connector.Left caliper and right caliper body can be rotated around connector, In rotation process, the portion of being embedded in is remained stationary with left caliper, and sliding part and interconnecting piece are slided with respect to right caliper body, so that right caliper body and a left side Caliper is rotated around an imaginary axis 3, which is in connector towards the position of binding clip.

When two calipers close up, as shown in Figure 3, sliding part is in the left position of left caliper arc groove, and two calipers are gradually opened When opening, jaw also opens simultaneously, and movable part gradually moves right along arc groove at this time, that is to say, that left caliper opposite joints Generation rotation, center of rotation are the position where imaginary axis 3, and the position of the mobile left caliper right end of sliding part, two calipers are opened at this time Open to the maximum angle.

Labor-saving effect is illustrated below by specific data.

Referring to figs. 7 and 8, stress condition when existing pliers shearing 3.4mm workpiece, comes by taking 7 cun of angle pliers as an example Illustrate, axle center is 9mm (conventional pincers are pincers 1) from cutting edge shearing bottom, and the present embodiment uses circular arc axle construction, and the center of circle is moved up 5mm, it is pincers 2 that axle center, which is 4mm(labor-saving plier from cutting edge shearing bottom).With 18 ° of the pliers angle of shear, from pliers center of rotation 120mm Locate force (F) to calculate: conventional pincers cutting edge root maximum can cut 3.4mm iron wire, shearing force F1, labor-saving plier cutting edge root maximum 1.5mm iron wire can be cut, shearing force F2:

> 3.4mm, pincers 1, the 2 shearing force arm of forces of pincers are identical, and pliers is hardly laborsaving；

=3.4mm, F1=120F/10.8, F2=125F/10.8；F2:F1=1.04；

< 3.4mm, the 1 shearing force arm of force of pincers is constant, and the 2 shearing force arm of forces of pincers reduce, and pincers 2 are laborsaving.

=3mm, F1=120F/10.8, F2=125F/9.6；F2:F1=1.172；

=2mm, F1=120F/10.8, F2=125F/6.4；F2:F1=1.758；

=1.5mm, F1=120F/9.8, F2=125F/4.8；F2:F1=2.13(maximum saves force value).

Conclusion: when iron wire diameter is greater than 3.4mm, pincers 2 are not laborsaving；When iron wire diameter is less than 3.4mm, pincers 2 are laborsaving, directly Diameter is smaller, and labor-saving effect is more obvious.

Embodiment 2: a kind of labor-saving plier (referring to Fig. 5 Fig. 6), difference from Example 1 is: the inlaid hole on right caliper body 14 be arc shape, and the radian of arc is identical as the radian of the arc groove on left caliper.Arc groove on left caliper is one, circular arc The arc length of slot is greater than the arc length of embedding slot.

The monnolithic case for connecting the connector of left caliper and right caliper body is non-rotating shape, the embedded portion of connector and sliding Portion is identical cross sectional shape, and the arc-shaped shape of sliding part, sliding part is with crooked radian identical with arc groove.Connector both ends Pier nose 15 is formed, and forms position limiting structure in the axial direction.Remaining structure is referring to embodiment 1.

The above is only the preferred embodiment of the utility model, not imposes any restrictions to the utility model, all According to the utility model technical spirit any simple modification, change and equivalent transformation to the above embodiments, still fall within The protection scope of technical solutions of the utility model.

Claims (10)

1. a kind of labor-saving plier, it is characterised in that including the first caliper and the second caliper, pass through between the first caliper and the second caliper Connector connection, the first caliper is fixedly connected with connector, and the second caliper is flexibly connected with connector, and connector can be with respect to the Two calipers are mobile, and the first caliper and the second caliper will form first caliper and practical turn of the second caliper when rotating around connector Dynamic imaginary axis, the imaginary axis are in connector towards the position of binding clip.

2. labor-saving plier according to claim 1, it is characterised in that imaginary axis is in binding clip close to the start bit of shearing edge It sets.

3. labor-saving plier according to claim 1, it is characterised in that be provided with arc groove, the center of circle of arc groove on the second caliper At axis in imaginary axis.

4. labor-saving plier according to claim 1 or 2, it is characterised in that be provided with arc groove, connector tool on the second caliper There are two parts, a part is the embedded portion that is mutually fixedly connected with the link slot on the first caliper, and second part is and the second caliper On the sliding part that is slidably connected of arc groove；Or the center of circle of arc groove is at the axis of imaginary axis.

5. labor-saving plier according to claim 4, it is characterised in that the shape of connector sliding part is non-rotating shape.

6. labor-saving plier according to claim 4, it is characterised in that arc groove only has one section, sliding part only one, sliding The arc-shaped shape in portion, sliding part have crooked radian identical with arc groove.

7. labor-saving plier according to claim 4, it is characterised in that arc groove is two sections, and sliding part is two, a sliding Portion corresponds to an arc groove.

8. labor-saving plier according to claim 7, it is characterised in that be provided with block between two arc grooves, block separates two circles The thickness of arc slot, block forms heavy portion less than the axial length of two arc grooves and between block and the surface of the second caliper, should Surface is surface of second caliper far from the first caliper.

9. labor-saving plier according to claim 8, it is characterised in that the end of two sliding parts has interconnecting piece to be connected, and interconnecting piece is in Arc shape, the thickness of interconnecting piece is equal with the thickness in heavy portion, and interconnecting piece has crooked radian identical with arc groove.

10. labor-saving plier according to claim 1 or 2 or 3, it is characterised in that connector both ends form pier nose, and in axial direction Upper formation position limiting structure.