CN2155289Y

CN2155289Y - Non-burning hand electric welding tongs

Info

Publication number: CN2155289Y
Application number: CN 92240746
Authority: CN
Inventors: 连惠民; 申福远
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-11-19
Filing date: 1992-11-19
Publication date: 1994-02-09
Anticipated expiration: 2002-11-19

Abstract

Disclosed is a pair of non-burning hand electric welding tongs, which is the improvement of clamp type manual electric welding tongs used for alternating current and direct current manual arc welding. Because a cavity which is used to fasten a welding cable is moved out of a handle and is arranged between a spring and a lower jaw by the adoption of clamping type fastening cables, contact resistance is reduced and the problem that hand can be burnt by electric welding tongs when the electric welding tongs are used is effectively solved. The wiring of the improved electric welding tongs is not difficult; the quantity of copper which is used is reduced; the whole cost is reduced; manufacture is very convenient.

Description

Non-burning hand electric welding tongs

The utility model relates to the improvement of a kind of clipping alternating current-direct current manual electric arc welding with electrode holders.

In the welding process, because the existence of contact resistance, no matter how clamping mode improves, and always produces heat during by powerful electric current in fastening place of welding cable and electrode holders, makes operator service time longly just feel hot.

At above deficiency, China utility model patent CN2038436U discloses a kind of " electrode holders of non-scald on hand ", be primarily characterized in that: described handle portion has installed additional heat insulation and heat abstractor, in order to realize this conception, must increase some auxiliary equipments and go heat radiation and heat insulation, structure is also with regard to more complicated; China utility model patent CN2066787U disclosed a kind of " non scalding hand electric welding tongs having " is primarily characterized in that the fastening chamber that is respectively equipped with fixing cord on the upper and lower jaw and the voussoir that matches, locking spring, this improvement has solved the displacement problem of thermal source, but cable is installed for cavity is set at upper and lower jaw, this part size will inevitably strengthen, make the electrode holders head become too big, and fastening also relatively more difficult with the taking-up voussoir.

The purpose of this utility model: provide a kind of can prevent effectively handle scald one's hand, reduce the generation of heat, simple in structure, cost reduces, electrode holders easy to use.

The purpose of this utility model is achieved in that the cavity with fastening cable shifts out the electrode holders handle, design is between the front portion of spring and lower jaw clamping welding rod, form the cavity of an attached cable by lower jaw rear portion and ambulatory splint, thereby make thermal source away from handle; The fastening of cable is combined into one by the extended metallic conductor of screw, ambulatory splint and lower jaw rear portion, handgrip, and clamping force increases, and contact resistance reduces, thereby has reduced the generation of heat.

Cavity in the device can be arranged on ambulatory splint below the handgrip and the lower jaw rear portion on handgrip forms cavity, is used for clamping cables.

Cavity in the device also the lower jaw rear portion can be placed on the handgrip lower surface top and on the ambulatory splint put form cavity and come clamping cables.

Because the cavity of fastening cable is arranged between spring and the lower jaw front portion, far away apart from handle, cavity top does not need to be provided with insulation protection (being open can dispel the heat effectively), therefore heat is difficult to be sent to the handle place, and the general employing of handgrip is iron, heat transmits difficulty, has solved the problem that scalds one's hand effectively; The mode that adopts screw and ambulatory splint to match is relative to hold out against the increase of mode clamping force with screw, and contact resistance reduces, and produces heat and reduces to some extent; The board-like cable fastening means of live splint, wiring is more convenient, and the conducting metal use amount reduces, and cost also descends to some extent.

Description of drawings

Fig. 1 is the embodiment of the utility model underneath type ambulatory splint

Fig. 2 is the embodiment of the utility model overhead ambulatory splint

Fig. 3 is that underneath type ambulatory splint lower jaw front portion is in conjunction with cutaway view

Fig. 4 is the latter half of view of handgrip

Fig. 1 has provided the embodiment of underneath type ambulatory splint, its main part mark is: 1. lower jaw 2. handgrips 3. trip bolts 5. ambulatory splints 7. screw of handle 8. handles 11. lower encioser screws 14. spring abutments 16. springs 23. lower enciosers, other component no longer identical with general electrode holders is stated.

The rear portion 12 of lower jaw 1 is between the front portion 10 and spring 16 of lower jaw 1, and rear portion 12 is provided with two screws.There is a slot 4 lower plane of

handgrip

2 and 12 corresponding sections, rear portion, and clamping iron plate 6 fixing on the ambulatory splint 5 is more smaller than slot 4.During installation, the rear portion of cable from handle 8 penetrated, arrive lower jaw rear portion 12 through the handgrip rear portion, copper cable is divided into two strands, penetrates the rear portion 12 of lower jaw 1 and the cavity between the ambulatory splint 5, two screws 3 are tightened, move on the underneath type ambulatory splint 5, cable is clamped.The front and rear part of lower jaw 1 is an one, and its top can be placed on the handgrip 2 than the bottom is slightly wide, by lower encioser screw 11 lower encioser 23, handgrip 2, lower jaw 1 is fused.Handgrip 26 places are that a gradient which is provided with two projections 15 to the inclined-plane that parallels with curved, are used to place spring abutment 14, make spring 16 keep plumbness when work.The rear portion of handgrip 2 is provided with two fixed strips 9 and matches with groove 17 on the handle 8, and during screw of handle 7 fixed handles 8, screw 7, fixed strip 9 are formed a stable whole with groove 17, and the operator in use can be convenient, reliable.Ambulatory splint 5 should be combined into one when making with clamping iron plate 6.Remaining part of the present utility model and installation method are the same with general electrode holders.

Fig. 2 is a kind of embodiment of overhead ambulatory splint, with the mark of Fig. 1 main difference part is: 18. lower jaws, 19. handgrips, 20. ambulatory splints, 21. screws, 22. middle part insulation casings, 24. bearing pins.The rear portion 25 of lower jaw 1 is between bearing pin 24 and spring, rear portion 25 is provided with two through holes, a screw, be manufactured with two screws on the ambulatory splint 20, handgrip 19 is manufactured with 3 through holes with 25 corresponding sections, rear portion, the rear portion 25 of lower jaw 1 is positioned on the lower plane of handgrip 19, wherein trip bolt 3 is passed in Dui Ying two through holes, and the back that links to each other with ambulatory splint 20 forms cavity 13 between lower jaw 25 and ambulatory splint 20.Cable penetrates handle 8 during installation, through handgrip 19 rear portions, is divided into two strands and penetrates cavity 13, tightens screw 3, and ambulatory splint 20 moves down, and cable is clamped.Be screwed into screw on the rear portion 25 of lower jaw 1 with screw 21 then, middle part insulation casing 22 is tightened on the handgrip 19.The connected mode of remainder is identical with previous embodiment.

Fig. 3 be underneath type ambulatory splint lower jaw front portion in conjunction with cutaway view, can see among the figure that the top of lower jaw 1 is wideer than Lower Half, form boss, can be placed on the handgrip 2.Screw 11 fuses lower encioser 23, handgrip 2 and

lower jaw

1,9 fixed strips for the handle connection.

Fig. 4 is the latter half of view of handgrip, and 9 is the fixed strip that matches with the groove 17 of

handle

8, and 15 for placing the boss of spring abutment.

Non scalding hand electric welding tongs having after improving because thermal source moves outward, heat radiation better, so the sectional area (area of passage) of lower jaw comparable original electrode holders copper body of sectional area when selecting copper material to make reduces 15～20%; Its sectional area of cavity of the fastening cable that ambulatory splint and lower jaw rear portion form should be greater than 110 square millimeters. Insulation casing and ambulatory splint can select phenolic aldehyde cloth waste bakelite powder to make, and handgrip can be selected the making of cold rolling iron plate, and lower jaw also can select other conducting metal to make.

Claims

1, a kind of electrode holders of non-scald on hand, constitute by handgrip, handle, bit, curved handle, ambulatory splint, spring and insulation crust etc., it is characterized in that: be provided with the device of an attached cable between spring (16) and lower jaw clamping welding rod front portion (10), described device is to be made of lower jaw rear portion (12 or 25), exciting clamping plate (5 or 20) and screw (3).

2, device according to claim 1 is characterized in that lower jaw (1 or 18) is made of the front portion (10) of clamping welding rod and the rear portion (12 or 25) of clamping cables.

3, device according to claim 1 is characterized in that lower jaw rear portion (12) is positioned between the lower plane of the top of handgrip (2) and handgrip and the ambulatory splint (5) to form cavity (10).

4, device according to claim 1 is characterized in that lower jaw rear portion (25) is placed on the lower plane of handgrip (19) to form cavity (10) with ambulatory splint (20).

5,, it is characterized in that ambulatory splint is made up of fastening iron plate (6) and insulation crust (6) according to claim 1 or 4 described devices.

6,, it is characterized in that ambulatory splint is a metallic plate that two screws are arranged according to claim 1 or 4 described devices.

7,, it is characterized in that the lower plane of handgrip (2) has oblong aperture (4) according to claim 1 or 3 described devices.

8, device according to claim 1 is characterized in that the projection (15) of placing spring abutment is arranged on the handgrip (2 or 19).

9, device according to claim 1 is characterized in that handgrip (2 or 19) rear portion has two fixed strips (9) to match with the groove (17) of handle (8).