CN2399163Y

CN2399163Y - Auto-locking tongs

Info

Publication number: CN2399163Y
Application number: CN 99229886
Authority: CN
Inventors: 徐永明
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-11-05
Filing date: 1999-11-05
Publication date: 2000-10-04
Anticipated expiration: 2009-11-05

Abstract

The utility model relates to a pair of automatically locking tongs. The utility model comprises a first tong body and a second tong body, wherein, a handgrip of the first tong body is movably connected with a tooth part of the tongs; the handgrip of the second tong body is fixedly connected with the tooth part of the tongs. The lower half part of the handgrip of the second tong body is provided with a spacing square frame in which two triangular wedge blocks are arranged. A four-connecting rod mechanism is composed of four points which are a connecting shaft pin of the second tong body and the first tong body, a shaft pin at a connecting position of the bottom of the second tong body and the handgrip of the second tong body, and two shaft pins at the both ends of a connecting rod. The utility model which can automatically lock articles has all functions of the tongs and an ordinary spanner, other workpieces in various shapes can be fastened, and clamping injury for the objects is small. The utility model has the advantages of large clamping force, long life time, convenient and fast use, etc.

Description

The auto-locking suspension pliers

The utility model relates to a kind of adjustment type pliers, relates in particular to a kind of pliers that can be held article at auto lock under the free position.

Pliers is one of instrument of being used always of general work person, it not only can be used for locking screw or holding workpiece, article such as water pipe also can be used for locking, use more convenient, but traditional pliers will on hand firmly could be fastening with article during article in locking, hand one is loosening, article will break away from from pliers, bring a lot of troubles to the operator, and when pliers during at the clamping large article, open because two pincers toothed portions of pliers get very, make two pincers handles also get very and open, hold on two pincers handles of pliers and do not make much strength, can not reach the requirement of firm interlock.

The purpose of this utility model is to provide a kind of auto-locking suspension pliers, it can be when holding articles auto lock article and do not need to do any adjustment, and need not apply extra strength.

For achieving the above object, the technical solution of the utility model is, a kind of auto-locking suspension pliers, comprise first caliper and second caliper, the front end of second caliper is pincers tooth portion, the rear portion is the handle that is used to grip, pincers tooth portion's bottom outside and handle junction are provided with a pivot pin, pincers tooth portion's bottom inside of second caliper and the pincers tooth portion of first caliper bottom are also hinged by a pivot pin, be fixed together between pincers tooth portion on first caliper and the handle, it is characterized in that: the handle design of described first caliper becomes groove shape, groove shape opening is towards second caliper, in the bottom of groove shape handle the spacing square frame that one or four bandings close is set, the top of spacing square frame and bottom then are open state, spacing square frame is close to one side of groove shape bottom and is extended one section again to slot opening direction flanging to the pincers tooth portion of first caliper, become a spacing bayonet socket, two triangle voussoirs are arranged in spacing square frame, the two triangle voussoir the inclined-plane staggered relatively, and just in time place on the contrary the top and bottom position of two voussoirs, a wherein bottom-up voussoir is hinged by an end of a pivot pin and a connecting rod, the other end of connecting rod also is connected top triangle voussoir up by pivot pin and then is hinged with a union body with the handle of second caliper, connecting rod passes union body, connect a return spring on the union body, return spring is connected the pincers tooth portion bottom of second caliper.

The utility model has the advantages that: because the pivot pin that second caliper and first caliper are hinged in the utility model, the pivot pin that second caliper bottom and its handle are hinged and locate, pivot pin that the second caliper handle and connecting rod are hinged and connecting rod and bottom-up triangle voussoir connect the pivot pin at hinge place and have formed a quadric chain, when the pliers holding articles, because quadric chain effect, the utility model can be done clamping, locking, squeezing, the instrument of compression, have as pliers, all functions with pliers, more can self-locking, after can being locked together several workpiece, the operator just can loose one's grip, free hand to welding work pieces or with bolting, it can be made spanner and use, all functions with common wrench, more can be after the arm of angle wearing and tearing of hex nut bolt, clamp them by self-locking, thereafter turn, even can lock cylinder or other irregularly shaped workpiece such as water pipe, it can make the anchor clamps of machine tooling part again, workpiece does not become flexible because of processing after the self-locking, the user promptly clamps workpiece after only need applying initial curable grip sustainably, in addition, it is big to the utlity model has chucking power, life-span is long, convenient to use, advantages such as applied range.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 is the structural representation under the utility model nature;

Fig. 2 is the utility model folded state schematic diagram.

As seen from the figure, the utility model comprises first caliper 3 and second caliper 15, the front end of second caliper 15 is pincers tooth portion 13, the rear portion is the handle 18 that is used to grip, the junction of pincers tooth portion's 13 bottom outside and handle 18 is provided with a pivot pin 14, pincers tooth portion 13 bottom inside of second caliper 15 also are hinged and connected to by a pivot pin 2 with pincers tooth portion 1 bottom of first caliper 3, between the pincers tooth portion 1 on first caliper 3 and the handle 8 for fixedlying connected.The handle 8 of first caliper 3 is designed to groove shape, groove shape opening is towards second caliper 15, be installed with the spacing square frame 21 that one or four bandings close in the bottom of groove shape handle 8, the top of spacing square frame 21 and bottom then are open state, spacing square frame 21 is close to one side of bottom portion of groove and is extended one section again to slot opening direction flanging to the pincers tooth portion of first caliper 3, become a spacing bayonet socket 7, in spacing square frame 21, place two triangle voussoirs 11 and 12, triangle voussoir 11 and 12 the inclined-plane staggered relatively, and just in time place on the contrary the top and bottom position of two triangle voussoir 11 and 12, in order to reduce the frictional force of two triangle voussoirs 11 and 12 when the contact displacement, be provided with a smooth sheet metal 23 in the centre of two triangle voussoirs 11 and 12.Bottom-up triangle voussoir 11 is hinged by the end of pivot pin 9 with connecting rod 20, the other end of connecting rod 20 is hinged by the handle 18 of the pivot pin 17 and second caliper 15, for regulating the elasticity of pliers when the holding articles, one set screw 10 is set between union body 6 and triangle voussoir 12, the hinged end design of connecting rod 20 and triangle voussoir has the bayonet socket 22 of a protrusion, bayonet socket 22 is against on the set screw 10, for preventing that connecting rod 20 from colliding in when swing and union body 6, on union body 6, have an elongated hole, connecting rod 20 passes union body 6 and can freely swing, connect return spring 5 on the union body 6, return spring 5 is connected pincers tooth portion 13 bottoms of second caliper 15, because return spring 5 effects, bayonet socket 22 on set screw 10 and the connecting rod 20 remains when free position and contacts, and unclamping two handles 18 and at 8 o'clock, return spring 5 can make bottom-up triangle voussoir 11 be returned to spacing bayonet socket 7 places, and two triangle voussoirs 11 and 12 inclined-plane also are separated from.Adjust set screw 10, can regulate the upper-lower position of triangle voussoir 12 in spacing square frame 21, regulate the distance of two triangle voussoirs 11 and 12 between spacing square frame 21 interior two inclined-planes, displacement when adjusting triangle voussoir 11 and 12 is clamped in the spacing square frame 21, adjust quadric chain two

handles

18 and 8 open angles when " dead point " position, thereby regulate the elasticity of pliers when holding articles.In addition, in order to increase the multifunctionality of pliers, handle 18 afterbodys at second caliper 15 are provided with pivot pin 19, be connected with instruments such as screwdriver, cutting tool, arrow cutter and uncork opener on the pivot pin 19, these instruments can pull out around pivot pin 19 as required in use, then can be placed into handle 19 inside when not using these instruments, not influence the good looking appearance of pliers.In order to prevent that the pliers holding articles is too tight later on, when being not easy two

handles

18 and 8 are drawn back with hand, on pivot pin 19, also be connected with one and pull out sheet 25, pull out and have an elongated hole 24 on the sheet 25, pivot pin 19 is through in the elongated hole 24, pulling out sheet can also can grasp an end that pulls out sheet 25 and rotate around pivot pin 19 along elongated hole 24 pullings.

The utility model in use, as shown in Figure 1, this moment, the utility model auto-locking suspension pliers was nature, the pivot pin 2 that second caliper 15 and first caliper 3 are hinged, the pivot pin 14 that the pincers tooth portion 13 and the handle 18 of second caliper 15 is hinged and second caliper 15 are a straight line substantially with 17 3 points of pivot pin of connecting rod 20 hinged places, because return spring 5 effects, the bottom of triangle voussoir 11 is limited in spacing bayonet socket 7 places, the top is then stretched in the spacing square frame 21, the bottom of another triangle voussoir 12 is also stretched in the spacing square frame 21 this moment, two triangle voussoirs 11 and 12 inclined-plane and sheet metal 23 are disengaged position, and set screw 10 withstands on the bayonet socket 22 of connecting rod 20.When the utility model needs the interlock article, grasp first caliper 15 and second caliper 3, the handle 8 of handle 18 on second caliper 15 on first caliper 3 drawn close, under the promotion of connecting rod 20, the pincers tooth portion 13 of second caliper 15 is drawn close to the pincers tooth portion 1 of first caliper 3 around the pivot pin 2 of inside bottom, contact with article, power is on hand passed to article by linkage, the suffered reaction force of article is delivered on the handle 18 of second caliper 15 through second caliper, 15 pincers tooth portions 13, the reaction force acts line that is subjected on second caliper, 15 handles 18 is at this moment by pivot pin 14 and pivot pin 17 on it, can not open around they rotations, reaction force on hand passes on the connecting rod 20 by the handle 18 of second caliper 15 again, connecting rod 20 is subjected to line of action of force, this moment is also by pivot pin 17, can not rotate yet, but this active force can make the bottom-up triangle voussoir 11 that connects together with connecting rod 20 move down along spacing square frame 21, because the bayonet socket 22 on the connecting rod 20 withstands on the set screw 10, so also will promote downwards simultaneously with the top triangle voussoir 12 up that set screw 10 links together, the distance of the pivot pin 17 because connecting rod 20 and triangle voussoir 11 are hinged on the pivot pin 9 at place and the connecting rod 20 is than the distance of the pivot pin on the connecting rod 20 17 to set screw 10, so, the downward displacement of the triangle voussoir that directly is connected with connecting rod 20 11 displacement more downward than the triangle voussoir that is connected with set screw 12 is more a little, like this when being subjected to displacement, two inclined-planes on the two triangle voussoir 11 and 12 will contact with sheet metal 23 and push, but because the restriction of spacing square frame 21, two triangle voussoirs 11 and 12 just are clamped on the inwall of spacing square frame 21, can not move freely again, the pivot pin 9 at this place becomes fixed pivot at this moment, at this moment quadric chain is in " dead point " position, 3 of the pincers tooth portion 13 of second caliper 15 and the pivot pin 14 of handle 18 junctions and connecting rod 20 two

ends pivot pins

9 and 17 are a straight line substantially, this line is called " dead wire ", continue firmly handle 18 and 8, two

handles

18 and 8 close up, the handle 18 of second caliper 15 folds into to the handle 8 of first caliper 3 with the pivot pin 17 at connecting rod 20 places of being hinged, make become an obtuse triangle at above 3, even the application of force no longer, two

handles

18 and 8 can not rotate, two pincers teeth 13 and 1 are bitten the article that are held firmly, article can not be separated from from two pincers tooth portions 13 and 1, thereby reach auto lock, the requirement of firm interlock.After using the utility model,, allow pliers be returned to nature with pulling out two handles 18 and 8.If two pincers teeth 13 and 1 interlock get too tight, in the time of can not easily two

handles

18 and 8 being drawn back with hand, just will pull out sheet 25 pulls out from elongated hole 24, an end that pulls out sheet 25 is against on the handle 8 of first caliper 3, according to lever principle, one pull out gently at the other end that pulls out sheet 25, just two

handles

18 and 8 can be pushed aside, pliers returns to nature.

Claims

1, a kind of auto-locking suspension pliers, comprise first caliper (3) and second caliper (15), the front end of second caliper (15) is pincers tooth portion (13), the rear portion is the handle (18) that is used to grip, the junction of pincers tooth portion's (13) bottom outside and handle (18) is provided with a pivot pin (14), pincers tooth portion (13) bottom inside of second caliper (15) and the pincers tooth portion (1) of first caliper (3) bottom are also hinged by a pivot pin (2), be fixed together between pincers tooth portion (1) on first caliper (3) and the handle (8), it is characterized in that: the handle design of described first caliper (3) becomes groove shape, groove shape opening is towards second caliper (15), the spacing square frame (21) that one or four bandings close is set in the bottom of groove shape handle (8), the top of spacing square frame (21) and bottom then are open state, one side that spacing square frame (21) is close at the bottom of the groove is extended one section again to slot opening direction flanging to the pincers tooth portion (1) of first caliper (3), become a spacing bayonet socket (7), (21) have two triangle voussoirs (11) and (12) in spacing square frame, the inclined-plane of two triangle voussoir (11) and (12) is staggered relatively, and just in time place on the contrary the top and bottom position of two triangle voussoir (11) and (12), a wherein bottom-up triangle voussoir (11) is hinged by the end of pivot pin (9) with connecting rod (20), the other end of connecting rod (20) also is hinged by the handle (18) of pivot pin (17) with second caliper (15), top triangle voussoir (12) up then is connected with a union body (6), connecting rod (20) passes union body (6), union body (6) is gone up and is connected a return spring (5), and return spring (5) is connected pincers tooth portion (13) bottom of second caliper (15).

2, auto-locking suspension pliers according to claim 1 is characterized in that: between described two triangle voussoirs (11) and (12) two relative inclined-planes one sheet metal (23) is set.

3, auto-locking suspension pliers according to claim 1 is characterized in that: the afterbody at described second caliper (15) handle (18) is provided with a pivot pin (19).

4, according to claim 1 or 3 described auto-locking suspension pliers, it is characterized in that: the pivot pin (19) of described second caliper (15) handle (18) afterbody is gone up connection one and is pulled out sheet (25), pull out and have an elongated hole (24) on the sheet (25), pivot pin (19) penetrates in the elongated hole (24).

5, auto-locking suspension pliers according to claim 1 is characterized in that: between described union body (6) and top triangle voussoir (12) up a set screw (10) is set.