CN105174042B

CN105174042B - A kind of high reliability stone tongs

Info

Publication number: CN105174042B
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: 2017-10-10
Anticipated expiration: 2035-10-09
Also published as: CN105174042A

Abstract

The present invention relates to a kind of high reliability stone tongs, belong to hanging device technical field, including the first jig arm and the second jig arm, first jig arm and the second jig arm lower end are provided with bending, the bending end is connected with clamping device, there is boss in the middle part of first jig arm, the bar hole through block is offered in the boss, second jig arm is passed through from bar hole, the rotating shaft for crossing the second jig arm and boss is provided with the bar hole, stopping means is provided between lifting hole(eyelet) and rotating shaft in first jig arm and the second jig arm, the stopping means includes two bows, it is flexibly connected between the bow by the first rivet, the one end of the bow away from the first rivet is flexibly connected with the first jig arm by the second rivet.The technical scheme avoids jig arm opening angle excessive or too small countershaft produces larger twisting resistance, the problem of causing rotating shaft deformation, extends fixture service life, beneficial effect is notable.

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, should be targetedly from conjunction Suitable suspender, for example, in casting technique, the casting die cavity made using roughing sand, adhesive and other auxiliary materials, due to its casting Product structure is mutually corresponded to, typically with smooth surface, the suspension centre lifted by crane without the hook-shaped suspender of confession, and sand mold outer surface is Mechanical failure is avoided the occurrence of, therefore a kind of hanging suitable for such product should not be targetedly designed with hard holder contacts Clamps are extremely urgent.

The content of the invention

To solve problems of the prior art, the invention provides a kind of high reliability stone tongs, particular technique Scheme is as follows：

A kind of high reliability stone tongs, including the first jig arm and the second jig arm, first jig arm and the second jig arm Upper end is correspondingly arranged on lifting hole(eyelet), and first jig arm and the second jig arm lower end are provided with bending, and the bending end is connected with folder Holding has the bar hole offered in boss, the boss through block, described second in the middle part of device, first jig arm Jig arm is passed through from bar hole, and the rotating shaft for crossing the second jig arm and boss, the rotating shaft two ends are provided with the bar hole It is threaded with fixing nut, first jig arm and the second jig arm and stopping means is provided between lifting hole(eyelet) and rotating shaft, institute Stating stopping means includes between two bows, the bow being flexibly connected by the first rivet, and the bow is away from the One end of one rivet is flexibly connected with the first jig arm by the second rivet.

As the improvement of above-mentioned technical proposal, the bow is provided with L-shaped gag lever post close to one end of the first rivet.

As the improvement of above-mentioned technical proposal, the clamping device includes U-shaped contiguous block, the contiguous block and bending end It is flexibly connected by bearing pin, side of the contiguous block away from bending is fixedly connected with clamping plate, and the clamping plate is away from contiguous block Side is provided with flexible cushion.

As the improvement of above-mentioned technical proposal, the contiguous block is positioned close to the position of clamping plate side lower end, described soft Property bed course has the larger thick end of thickness and the less thin end of thickness.

As the improvement of above-mentioned technical proposal, chain is fixedly connected between the lifting hole(eyelet).

The jaw type clamping device that above-mentioned technical proposal is constituted by using two jig arm of the first jig arm and the second jig arm, in order to The load of rotating shaft between two jig arm is reduced, the stopping means constituted using two bows carries out auxiliary traction to jig arm, it is to avoid jig arm Opening angle is excessive or too small countershaft produces larger twisting resistance, the problem of causing rotating shaft deformation, extends the use longevity of fixture Life, with beneficial technique effect.

Figure of description

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

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

Embodiment

As shown in Figure 1, there is shown, the invention provides a kind of high reliability stone tongs, including the first jig arm 10 and the second jig arm 10a, wherein the first jig arm 10 and the second jig arm 10a upper end are correspondingly arranged on lifting hole(eyelet) 11, the first jig arm 10 and the second jig arm 10a Lower end is provided with bending 14, and the end of bending 14 is connected with clamping device 40, and the middle part of the first jig arm 10 has boss 12, boss The bar hole 13 through block is offered in 12, the second jig arm 10a is passed through from bar hole 13, is provided with and crosses in bar hole 13 Second jig arm 10a and boss 12 rotating shaft 20, the two ends of rotating shaft 20 are threaded with fixing nut 21, the first jig arm 10 and second Stopping means is provided with jig arm 10a between lifting hole(eyelet) 11 and rotating shaft 20, stopping means includes two bows 30, bow 30 Between be flexibly connected by the first rivet 22, the one end of bow 30 away from the first rivet 23 and the first jig arm 10 pass through the second riveting Nail 23 is flexibly connected.

In use, being clamped by the clamping device 40 of two jig arm ends to sand mold, pass through rising for being connected with lifting hole(eyelet) 11 Device for hoisting slings two jig arm, because two jig arm are flexibly connected by rotating shaft 20, and boom hoisting is in two lifting hole(eyelet)s 11 during lifting Between produce opposite pulling force, make both that there is trend close to each other on the pulling force effect and two arms, pass through 20 liang of rotating shaft Arm will produce clamping trend to sand mold, it is ensured that arc in the firm connection of fixture and sand mold, above-mentioned stopping means in hoisting process The effect of shape bar 30 is to play a part of auxiliary traction in two jig arm opening procedures, it is to avoid the connection of rotating shaft 20 two is used alone and presss from both sides Arm causes the problem of load of rotating shaft 20 is larger, improves the service life of stone tongs.

Further, bow 30 is provided with L-shaped gag lever post 31, the effect of gag lever post 31 close to one end of the first rivet 22 It is to limit bow 30 after two jig arm open up into certain angle further to move, it is to avoid jig arm opening angle crosses ambassador's rotating shaft 20 The torsion undertaken is excessive, causes rotating shaft 20 to produce deformation.

Further, as shown in Fig. 2 clamping device 40 includes U-shaped contiguous block 41, contiguous block 41 passes through with the end of bending 14 Bearing pin 44 is flexibly connected, and side of the contiguous block 41 away from bending 14 is fixedly connected with clamping plate 42, and the clamping plate 42 is away from contiguous block 41 side is provided with flexible cushion 43, and the effect of the flexible cushion 43 is protected when being clamping sand mold to its surface, it is to avoid Occurs mechanical damage in hoisting process, in use, being that contiguous block 41 can under the compressing of bending 14 when two jig arm are gradually clamped Rotated relative to bending 14, adapt to the shape of mould surface, so as to realize the close connection for accommodating device 40 and sand mold.

For the more preferably clamping effect of acquisition, contiguous block 41 is positioned close to the position of the side lower end of clamping plate 42, described Flexible cushion 43 has the larger thick end 43a and the less thin end 43b of thickness of thickness, and the purpose of the structure design is to adapt to lifting During jig arm when gradually clamping to the pressure change of sand mold, realized in clamping process and pressed from both sides by the different flexible cushion 43 of thickness Plate 42 is further rotated with contiguous block 41 relative to bending 14, and because contiguous block 41 is positioned close to the side lower end of clamping plate 42 Position, the lower end of clamping process middle clamp plate 42 pressure bigger by sand mold is given compared to the upper end of clamping plate 42 can be prevented effectively from sand The relative stability slided, further improve hoisting process is produced between type and stone tongs.In the above-described embodiments, lifting hole(eyelet) 11 Between be fixedly connected with chain 50, in use, the suspension hook 60 of boom hoisting is connected into the middle part of chain 50, you can realize sand mold Lifting.

Claims

1. a kind of high reliability stone tongs, including the first jig arm (10) and the second jig arm (10a), first jig arm (10) and The upper end of second jig arm (10a) is correspondingly arranged on lifting hole(eyelet) (11), and first jig arm (10) and the second jig arm (10a) lower end are set There is bending (14), bending (14) end, which is connected with the middle part of clamping device (40), first jig arm (10), has boss (12) bar hole (13) through block, is offered in the boss (12), second jig arm (10a) is from bar hole (13) In pass through, is provided with the rotating shaft (20) for crossing the second jig arm (10a) and boss (12), the rotating shaft in the bar hole (13) (20) two ends are threaded with fixing nut (21), it is characterised in that on first jig arm (10) and the second jig arm (10a) Stopping means is provided between lifting hole(eyelet) (11) and rotating shaft (20), the stopping means includes two bows (30), the arc It is flexibly connected between bar (30) by the first rivet (22), the one end and first of the bow (30) away from the first rivet (23) Jig arm (10) is flexibly connected by the second rivet (23), and the clamping device (40) includes U-shaped contiguous block (41), the contiguous block (41) it is flexibly connected with bending (14) end by bearing pin (44), side of the contiguous block (41) away from bending (14), which is fixed, to be connected Clamping plate (42) is connected to, side of the clamping plate (42) away from contiguous block (41) is provided with flexible cushion (43), the contiguous block (41) position of clamping plate (42) side lower end is positioned close to, the flexible cushion (43) has the larger thick end (43a) of thickness With the less thin end (43b) of thickness.

2. a kind of high reliability stone tongs as claimed in claim 1, it is characterised in that the bow (30) is close to first One end of rivet (22) is provided with L-shaped gag lever post (31).

3. a kind of high reliability stone tongs as claimed in claim 1 or 2, it is characterised in that solid between the lifting hole(eyelet) (11) Surely it is connected with chain (50).