CN2127650Y

CN2127650Y - Screwdriver

Info

Publication number: CN2127650Y
Application number: CN 92224035
Authority: CN
Inventors: 包柱
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-06-09
Filing date: 1992-06-09
Publication date: 1993-03-03
Anticipated expiration: 2002-06-09

Abstract

The utility model relates to a screwdriver of which the core bar is arranged in a supporting sleeve and a clamping sleeve. A head of the core bar is a cross-shaped cutter tip, and the core bar is provided with a pin shaft, a washer and a spring; the inner part of the supporting sleeve is provided with two washers which contact with a spring of the supporting sleeve of which the right end is provided with a liner bushing and a nut; the supporting sleeve is connected with the clamping sleeve through screw threads. The screwdriver of which the clamping jaw can be used for clamping screws is applicable for being used for assembling and disassembling the cross-shaped screws. The utility model can be operated by one hand, and labour is saved.

Description

Screwdriver

The utility model relates to a kind of screwdriver, belongs to the technical field of hand-operated tools.

At present screwdriver is of a great variety, but complex structure mostly all has certain limitation in the use, the time spent, often must grip screwdriver on the other hand, and another hand steered screw of holding could guarantee the unlikely deflection in its position, unlikely dropping.

The purpose of this utility model is that a kind of novel screwdriver will be provided, and it can overcome above-mentioned deficiency, utilizes three jaws and spring to cooperate, and jaw is clamped screw head and twisted screwdriver, can unload screw, but screw can not drop, can one-handed performance.

The purpose of this utility model is to realize like this, the front end of the core bar of screwdriver is the cross cutting edge shape, the edge is the rhombus groove, bearing pin is housed on the core bar, front suit one packing ring and spring, gripping sleeve is a cone, its inner chamber right-hand member has negative thread, and a spacer ring is adorned at the middle part, edge three grooves that are uniformly distributed along the circumference, pass the end of three jaws in the groove, jaw surfaces is jagged, three screw holes that are uniformly distributed along the circumference on gripping sleeve, three fixed screws of packing in the hole, just in time withstand jaw and make its unlikely slippage, splicing sleeve also is a cone, and hexagon is processed at two ends, and the left end hexagon is connected with a step, be connected with a band male screw portion again, just in time be screwed in the gripping sleeve, 2 packing rings are housed between spacer ring and the splicing sleeve, then core bar is partly inserted in splicing sleeve and the gripping sleeve, the time spent jaw can tighten screw, makes that screw is unlikely to come off.

The schematic diagram of Fig. 1 screwdriver core bar

The schematic diagram of Fig. 2 gripping sleeve

The schematic diagram of Fig. 3 splicing sleeve

The schematic diagram of Fig. 4 screwdriver structure

Now in conjunction with the accompanying drawings the structure of screwdriver is described in further detail:

By Fig. 1, the core bar of screwdriver (1), its front end have cross section across point of a knife (5), and its edge forms rhombus groove (6), and core bar (1) is equipped with bearing pin (2), packing ring (3) and helical spring (4).

Fig. 2 is the schematic diagram of gripping sleeve, gripping sleeve (7) is a cone, the right-hand member endoporus has a part of negative thread (8), one spacer ring (9) that has a centre bore is housed in gripping sleeve (7) inner chamber, its edge three grooves that are uniformly distributed along the circumference, three jaws (10) are housed in the groove, the right-hand member bending of jaw, and pass the groove of spacer ring (9), and all the other are all on the left side of spacer ring (9), and its left end is warpage also, jaw has breach (11), fixed screw (12) can be screwed into by the cone surface of gripping sleeve (7) and fix this jaw, makes its unlikely slippage, and three fixed screws (12) are equably along splicing sleeve (7) surface distributed.Two packing ring (13), (14) that thickness is different are equipped with in the right side of spacer ring (9), and when the left end male screw portion (18) of splicing sleeve was screwed in the gripping sleeve (7), its spring (4) just in time withstood claw and packing ring (13), (14) tightly.

Fig. 3 is the schematic diagram of splicing sleeve, splicing sleeve (16) middle part is a cone, its left end all has hexagon (15), there is narrower step (19) on the left side of hexagon (15), the left side of step (19) is the part (18) of band pin thread, just in time match with the endoporus negative thread (8) of gripping sleeve (7), between splicing sleeve (16) and gripping sleeve (7), packing ring (20) is housed also, splicing sleeve (16) has a through hole (21), but the left end in hole is equipped with lining (22), lining (22) surface has pin thread just in time to support in the screwed hole (21) of the right-hand member of splicing sleeve (16) (screwed hole is the long part in hole (21)), lining (22) outside is adorned a nut (17), the length that can align lining like this again.

Fig. 4 is the schematic diagram of screwdriver structure, earlier splicing sleeve (16) is contained in above the core bar (1) during assembling, load onto bearing pin (2) and packing ring (3) and spring (4) then, refill a last packing ring (20) at splicing sleeve (16) left end, then gripping sleeve (7) part is contained in above the core bar (1), so the threaded portion of splicing sleeve (16) (18) is screwed in the screwed hole of gripping sleeve (7) right-hand member.

During use, the cross point of a knife (5) of screwdriver core bar is aligned the cross recess of Philip's head screw, splicing sleeve and spring (4) compress forward, packing ring (13), (14), jaw reclamps screw head so unclamping earlier, be used for rotating in the direction of the clock core bar (1) multi-turn, this moment, screw was pulled away it out from object by screwdriver, because the effect of jaw needn't go to help with hand, screw also can leave body surface and unlikely dropping with jaw, otherwise when screw is installed, also can utilize jaw chucking screw to be screwed in the hole, one hand just can be operated again, and the screwdriver shank can be with wooden, also can be metal material, also can use as electronic screwdriver.

Compared with prior art, this screwdriver has following advantages:

1, this screwdriver is applicable to assembling or dismounting Philip's head screw, but the head of the structure clamping screw of its jaw, therefore can one-handed performance, screw terminal is jammed, and can not drop.

More laborsaving when 2, twisting screw.

3, simple in structure being easy to made.

Claims

1, a kind of screwdriver, it is characterized in that its core bar (1) front end has cross point of a knife (5) and rhombus groove (6), core bar (1) is equipped with packing ring (3), bearing pin (2) and spring (4), core bar (1) is contained in splicing sleeve (16) and the gripping sleeve (7), gripping sleeve (7) is a cone, right-hand member endoporus (8) has negative thread, gripping sleeve (7) inner chamber is equipped with the spacer ring (9) of band centre bore, uniform three grooves in its edge, adorn three jaws (10) in the groove, this groove is passed in the bending of jaw right-hand member, remainder is all on the left side of spacer ring (9), left end also bends, jaw (10) has breach (11) fixed screw (12) and is screwed into from gripping sleeve (7) surface and is fixed, 2 packing rings (13) are equipped with on the spacer ring right side, (14), splicing sleeve (16) middle part is a cone, left part has hexagon (15) and step (19), and band male screw portion (18), just in time match with the negative thread (8) of gripping sleeve (7), lining (22) is housed in the through hole of splicing sleeve right-hand member (21), and lining (22) outside is suit one nut (17) again.