CN1172708A

CN1172708A - Hydraulic pincers

Info

Publication number: CN1172708A
Application number: CN 97111004
Authority: CN
Inventors: 丁凡; 吴明光
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 1997-05-05
Filing date: 1997-05-05
Publication date: 1998-02-11
Anticipated expiration: 2017-05-05
Also published as: CN1063695C

Abstract

A strong hydraulic pliers able to cut off reinforcing steel bar with diameter less than or equal to 8 mm is composed of pliers body, fixed handle, moving handle moving up and down relative to fixed handle, fixed chop and movable chop. The hydraulic oil in the oil cavity of fixed handle pushed the piston in pliers body to move movable chop toward the fixed one for cutting off the reinforcing bar. Its advantages are saving labour, small size, light weight, and easily exchanged chops for different purposes.

Description

Hydraulic pincers

The present invention relates to hand-held metal sheet slitting equipment, is a kind of hydraulically powered locking pliers of using.

In the prior art field, cut off metal wire rod (as galvanized wire, steel wire, reinforcing bar etc.) ordinary steel wire pincers commonly used, though advantage such as it is little, in light weight to have a volume, easy to carry, it can only cut off the metal wire rod of diameter≤3mm; And common locking pliers, though can cut off the bigger metal wire rod of diameter, its volume is too big, weight is too heavy, carries inconvenience, require great effort very much during operation, and in some specific occasions, as especially inconvenience when carrying out work high above the ground.

The objective of the invention is: it provides a kind of hydraulic pincers that cuts off metal wire rod with hydraulic-driven can solve problems of the prior art.

To achieve the above object of the invention, the technical solution used in the present invention is: it comprises the caliper parts, fixed handle parts, flexible handle parts, regular jaw parts.Caliper parts wherein: comprise caliper, in a stomidium of caliper, first non-return valve that is communicated with oil pocket in the fixed handle is housed, be communicated with second non-return valve through the hole, the small plunger that can move up and down is housed between two holes, second non-return valve is communicated with off-load ball valve on the caliper through the hole, the off-load ball valve is communicated with oil pocket in the fixed handle through the hole, connect the off-load knob on the off-load ball valve, in another stomidium of caliper, from a left side, the right side piston is housed successively, piston and moving jaw are fixed as one, in the adjustable clamp oral pore spring base is housed, between spring base and piston hole inner face spring is housed.The fixed handle parts: comprise the fixed handle that an end and caliper are tightly connected, in the oil pocket in the fixed handle air bag is housed, connect with end cap seal, the through hole of air bag on end cap is communicated with atmosphere.The flexible handle parts: comprise the connecting rod that an end and caliper are hinged, the flexible handle hinged with the connecting rod other end, another fulcrum and small plunger end on the flexible handle are hinged.Regular jaw parts: comprise the regular jaw that is fixed on the caliper.

Have gathering sill on the moving jaw in the caliper hole, guide finger is housed in the gathering sill, prevent that moving jaw from rotating in moving process, fixing in the hole of guide finger insertion spring base.

The present invention compared with prior art, the useful effect that has is:

1. utilize the grip of hand, make flexible handle relative to rotating up and down with fixed handle, move up and down by small plunger, generation suction oil, make hydraulic oil promote the interior piston of caliper, make moving jaw close gradually, will be contained in the bar cutting of diameter≤8mm in moving jaw and the regular jaw, leicht fallen D/A during operation to regular jaw;

2. it is little to have volume, and its length is about 200mm, easy to carry about about 1kg in light weight, behind the replacing jaw, can conveniently become compacting pincers, the sweet or multifunctional pincer of punching, is very suitable for field and work high above the ground and uses.

Fig. 1, structural principle schematic diagram of the present invention;

Fig. 2, C-C cutaway view of the present invention.

Below in conjunction with accompanying drawing,, provide details of the present invention by description to embodiment.

The course of work of the present invention as shown in Figure 1 and Figure 2, can be divided into oil-absorbing process, oil extraction and cut-out reinforcing bar process, and the reseting procedure behind the cut-out reinforcing bar, its detailed process is as follows:

1. oil-absorbing process:

When holding fixed handle 14 and flexible handle 25 and unclamping, small plunger 23 is under spring 24 effects, flexible handle 25 upwards rotates around connecting rod 22 fulcrums and small plunger 23 fulcrums, drive small plunger 23 and move upward, the hydraulic oil in the fixed handle 14 in the oil pocket 13 is by non-return valve 12, hole 11, enter the space that small plunger 23 moves upward and afterwards forms, at this moment, non-return valve 9 and off-load ball valve 18 all are in closed condition under the effect that relief lever 19 screws.Be contained in the air in the air bag 15 in the fixed handle 14, be communicated with atmosphere, avoid in oil-absorbing process, can producing vacuum, when small plunger 23 is moved upward, cause oil suction insufficient by the hole on the end cap 16.

2. oil extraction and cut off the reinforcing bar process:

When holding fixed handle 14 and flexible handle 25 generation grip forces, flexible handle 25 rotates, driving small plunger 23 moves downward, hydraulic oil in the small plunger 23 following cavity volumes is entered in the cavity volume of piston 7 bottoms by hole 10, non-return valve 9, promoting piston 7 travels forward, and it is progressively close to regular jaw 1 to promote moving jaw 3, carry out oil suction, oil extraction process repeatedly, piston is progressively released the edge of a knife B and the edge of a knife A on the regular jaw 1 that make on the moving jaw 3 and reinforcing bar 2 can be cut off, and also compresses spring 6 simultaneously.

3. the reseting procedure behind the cut-out reinforcing bar:

After cutting off, reinforcing bar 2 unscrews relief lever 19, off-load ball valve 18 is opened, because it is fixing that guide finger 4 inserts in the spring base 5, makes under the elastic force effect that is contained in the spring 6 between spring base 5 and piston 7 hole inner faces, promote piston 7 and move backward, hydraulic oil in the piston 7 bottom cavity volumes is through non-return valve 9, hole 17, off-load ball valve 18, hole 20, flow back in the oil pocket 13, piston 7 resets with moving jaw 3.

In order to prevent in cutting off the reinforcing bar process, edge of a knife B on the moving jaw 3 rotates, and has gathering sill 21 on the moving jaw 3 in caliper 8 holes, and guide finger 4 is housed in the gathering sill 21, it can guarantee when cutting off reinforcing bar can with the edge of a knife A keeping parallelism on the regular jaw 1, guarantee to cut off effect.

Claims

1. a hydraulic pincers is characterized in that comprising the caliper parts, the fixed handle parts, and the flexible handle parts, the regular jaw parts, wherein:

1) caliper parts: comprise caliper [8], in a stomidium of caliper [8], be equipped with fixed handle [14] in first non-return valve [12] that is communicated with of oil pocket [13], through the hole [11], [10] be communicated with second non-return valve [9], in the hole [10], the small plunger [23] that can move up and down is housed [11], second non-return valve [9] is communicated with off-load ball valve [18] on the caliper [8] through hole [17], off-load ball valve [18] is communicated with oil pocket [13] in the fixed handle [14] through hole [20], off-load ball valve [18] is gone up and is connected off-load knob [19], in another stomidium of caliper [8], piston [7] is housed successively from a left side, the right side, piston [7] is fixed as one with moving jaw [3], moving jaw [3] is equipped with spring base [5] in the hole, between spring base [5] and piston [7] hole inner face spring [6] is housed;

2) fixed handle parts: comprise the fixed handle [14] that an end and caliper [8] are tightly connected, in the oil pocket [13] in the fixed handle [14] air bag [15] is housed, be tightly connected with end cap [16], the through hole of air bag [15] on end cap [16] is communicated with atmosphere;

3) flexible handle parts: comprise the connecting rod [22] that an end and caliper [8] are hinged, the flexible handle hinged [25] with the connecting rod other end, another fulcrum on the flexible handle [25] and small plunger [23] end are hinged;

4) regular jaw parts: comprise the regular jaw [1] that is fixed on the caliper [8].

2. hydraulic pincers according to claim 1 is characterized in that: has gathering sill [21] on the moving jaw [3] in caliper [8] hole, guide finger [4] is housed in the gathering sill [21], and fixing in the hole of guide finger [4] insertion spring base [5].