CN105174042A

CN105174042A - High-reliability hoisting clamp

Info

Publication number: CN105174042A
Application number: CN201510646723.3A
Authority: CN
Inventors: 吴来发; 王业传; 崔明胜
Original assignee: Hefei Casting and Forging Factory of Anhui Heli Co Ltd
Current assignee: Hefei Casting and Forging Factory of Anhui Heli Co Ltd
Priority date: 2015-10-09
Filing date: 2015-10-09
Publication date: 2015-12-23
Anticipated expiration: 2035-10-09
Also published as: CN105174042B

Abstract

The invention relates to a high-reliability hoisting clamp and belongs to the technical field of hoisting equipment. The high-reliability hoisting clamp comprises a first clamping arm and a second clamping arm. Bent parts are arranged at the lower end of the first clamping arm and the lower end of the second clamping arm, and the tail ends of the bent parts are connected with clamping devices. A reinforcing block is arranged in the middle of the first clamping arm. A strip-shaped hole penetrating through a block body is formed in the reinforcing block. The second clamping arm penetrates through the strip-shaped hole. A rotary shaft transversely penetrating through the second clamping arm and the reinforcing block is arranged in the strip-shaped hole. A limiting device is arranged in the portions, between hoisting holes and the rotary shaft, of the first clamping arm and the second clamping arm. The limiting device comprises two arc-shaped rods. The arc-shaped rods are movably connected through a first rivet. The end, away from the first rivet, of the corresponding arc-shaped rod is movably connected with the first clamping arm through a second rivet. By the adoption of the technical scheme, the problem that large torsional force is applied to the rotary shaft due to the fact that the opening angle of the clamping arms is too large or too small, and consequentially deformation of the rotary shaft is caused is solved; the service life of the clamp is prolonged, and remarkable beneficial effects are achieved.

Description

A kind of high reliability stone tongs

Technical field

The present invention relates to a kind of high reliability stone tongs, belong to hanging device technical field.

Background technology

Stone tongs is widely used in the industrial production, because the structure of workpiece is different, suitable suspender should be selected targetedly, such as, in foundry technique, use the foundry goods die cavity that roughing sand, clot bond and other auxiliary materials are made, because its cast product structure is mutually corresponding, general with level and smooth surface, not there is the suspension centre for hook-shaped suspender lifting, and in order to avoid there is physical damage in sand mold outside face, should not with hard holder contacts, therefore design a kind of stone tongs being suitable for such product targetedly extremely urgent.

Summary of the invention

For solving problems of the prior art, the invention provides a kind of high reliability stone tongs, concrete technical scheme is as follows:

A kind of high reliability stone tongs, comprise the first jig arm and the second jig arm, the upper end correspondence of described first jig arm and the second jig arm is provided with lifting hole(eyelet), described first jig arm and the second jig arm lower end are provided with bending, described bending end is connected with holding device, in the middle part of described first jig arm, there is boss, the bar hole running through block is offered in described boss, described second jig arm is passed from bar hole, the rotating shaft of crossing the second jig arm and boss is provided with in described bar hole, described rotating shaft two ends have been threaded captive nut, described first jig arm and the second jig arm are provided with inhibiting device between lifting hole(eyelet) and rotating shaft, described inhibiting device comprises two bows, be flexibly connected by the first rivet between described bow, described bow is flexibly connected by the second rivet with the first jig arm away from one end of the first rivet.

As the improvement of technique scheme, described bow is provided with L shape position-limited lever near one end of the first rivet.

As the improvement of technique scheme, described holding device comprises U-shaped contiguous block, described contiguous block is flexibly connected by bearing pin with bending end, and described contiguous block is fixedly connected with clamping plate away from the side of bending, and described clamping plate are provided with flexible cushion away from the side of contiguous block.

As the improvement of technique scheme, described contiguous block is arranged on the position near lower end, clamping plate side, and described flexible cushion has the larger thick end of thickness and the less thin end of thickness.

As the improvement of technique scheme, between described lifting hole(eyelet), be fixedly connected with chain.

The jaw type fixing device that technique scheme consists of use first jig arm and the second jig arm two jig arm, in order to reduce the load of rotating shaft between two jig arm, the inhibiting device of two bow compositions is used to carry out auxiliary traction to jig arm, avoid the twisting resistance that jig arm opening angle is excessive or too small countershaft generation is larger, cause the problem of rotating shaft deformation, extend the service life of fixture, there is useful technique effect.

figure of description

Fig. 1 is the structural representation of a kind of high reliability stone tongs of the present invention;

Fig. 2 is the structural representation of holding device in the present invention.

Detailed description of the invention

As Fig. 1, shown in, the invention provides a kind of high reliability stone tongs, comprise the first jig arm 10 and the second jig arm 10a, wherein the upper end correspondence of the first jig arm 10 and the second jig arm 10a is provided with lifting hole(eyelet) 11, first jig arm 10 and the second jig arm 10a lower end are provided with bending 14, bending 14 end is connected with holding device 40, in the middle part of first jig arm 10, there is boss 12, the bar hole 13 running through block is offered in boss 12, second jig arm 10a passes from bar hole 13, the rotating shaft 20 of crossing the second jig arm 10a and boss 12 is provided with in bar hole 13, rotating shaft 20 two ends have been threaded captive nut 21, first jig arm 10 and the second jig arm 10a are provided with inhibiting device between lifting hole(eyelet) 11 and rotating shaft 20, inhibiting device comprises two bows 30, be flexibly connected by the first rivet 22 between bow 30, bow 30 is flexibly connected by the second rivet 23 with the first jig arm 10 away from one end of the first rivet 23.

During use, clamped by holding device 40 pairs of sand molds of two jig arm ends, by the lifting appliance be connected with lifting hole(eyelet) 11, two jig arm are sling, because two jig arm are flexibly connected by rotating shaft 20, in lifting process, lifting appliance produces pulling force in opposite directions between two lifting hole(eyelet)s 11, this pulling force effect and two arms make both have trend close to each other, clamping trend will be produced to sand mold by rotating shaft 20 liang of arms, guarantee that in hoisting process, fixture is connected with the firm of sand mold, in above-mentioned inhibiting device, the effect of bow 30 is the effects playing auxiliary traction in two jig arm opening procedures, avoid being used alone rotating shaft 20 to connect two jig arm and cause the problem that rotating shaft 20 load is larger, improve the service life of stone tongs.

Further, bow 30 is provided with L shape position-limited lever 31 near one end of the first rivet 22, the effect of position-limited lever 31 after two jig arm open up into certain angle, limits bow 30 move further, torsion that ambassador's rotating shaft 20 bears is excessive to avoid jig arm opening angle to cross, and causes rotating shaft 20 to produce deformation.

Further, as shown in Figure 2, holding device 40 comprises U-shaped contiguous block 41, contiguous block 41 is flexibly connected by bearing pin 44 with bending 14 end, contiguous block 41 is fixedly connected with clamping plate 42 away from the side of bending 14, described clamping plate 42 are provided with flexible cushion 43 away from the side of contiguous block 41, when the effect of this flexible cushion 43 is clamping sand molds, its surface is protected, avoid occurring mechanical damage in hoisting process, during use, when two jig arm clamp gradually be, contiguous block 41 can rotate relative to bending 14 under the compressing of bending 14, adapt to the shape of mould surface, thus realize the compact siro spinning technology accommodating device 40 and sand mold.

In order to the better clamping effect obtained, contiguous block 41 is arranged on the position near lower end, clamping plate 42 side, described flexible cushion 43 has the larger thick end 43a of thickness and the less thin end 43b of thickness, the object of this structure design adapts to change the pressure of sand mold when in hoisting process, jig arm clamps gradually, realize clamping process middle clamp plate 42 by the flexible cushion 43 that thickness is different to rotate further relative to bending 14 with contiguous block 41, and because contiguous block 41 is arranged on the position near lower end, clamping plate 42 side, the pressure larger with sand mold will be given compared to clamping plate 42 upper end in clamping process middle clamp plate 42 lower end, can effectively avoid producing relative sliding between sand mold and stone tongs, the stability of further raising hoisting process.In the above-described embodiments, between lifting hole(eyelet) 11, be fixedly connected with chain 50, during use, the suspension hook 60 of lifting appliance be connected in the middle part of chain 50, the lifting of sand mold can be realized.

Claims

1. a high reliability stone tongs, comprise the first jig arm (10) and the second jig arm (10a), the upper end correspondence of described first jig arm (10) and the second jig arm (10a) is provided with lifting hole(eyelet) (11), described first jig arm (10) and the second jig arm (10a) lower end are provided with bending (14), described bending (14) end is connected with holding device (40), described first jig arm (10) middle part has boss (12), the bar hole (13) running through block is offered in described boss (12), described second jig arm (10a) is passed from bar hole (13), the rotating shaft (20) of crossing the second jig arm (10a) and boss (12) is provided with in described bar hole (13), described rotating shaft (20) two ends have been threaded captive nut (21), it is characterized in that, described first jig arm (10) and the second jig arm (10a) are provided with inhibiting device between lifting hole(eyelet) (11) and rotating shaft (20), described inhibiting device comprises two bows (30), be flexibly connected by the first rivet (22) between described bow (30), described bow (30) is flexibly connected by the second rivet (23) with the first jig arm (10) away from one end of the first rivet (23).

2. a kind of high reliability stone tongs as claimed in claim 1, is characterized in that, described bow (30) is provided with L shape position-limited lever (31) near one end of the first rivet (22).

3. a kind of high reliability stone tongs as claimed in claim 1, it is characterized in that, described holding device (40) comprises U-shaped contiguous block (41), described contiguous block (41) is flexibly connected by bearing pin (44) with bending (14) end, described contiguous block (41) is fixedly connected with clamping plate (42) away from the side of bending (14), and described clamping plate (42) are provided with flexible cushion (43) away from the side of contiguous block (41).

4. a kind of high reliability stone tongs as claimed in claim 3, it is characterized in that, described contiguous block (41) is arranged on the position near clamping plate (42) lower end, side, and described flexible cushion (43) has the larger thick end (43a) of thickness and the less thin end (43b) of thickness.

5. a kind of high reliability stone tongs according to any one of claim 1-4, is characterized in that, is fixedly connected with chain (50) between described lifting hole(eyelet) (11).