CN2100284U - Anti-withdrawal four-head solid wrench - Google Patents

Abstract

The utility model discloses an anti-withdrawal four-head solid wrench. Each head of the existing solid wrench can be only screwed with a kind of screw cap, and the jaw needs drawing turning one angle each time and realigning. Each head of the solid wrench of the utility model comprises 8 flat surfaces and curved surfaces, wherein, each head comprises 4 mutually parallel flat surfaces. The other surfaces are respectively locating surfaces and avoiding surfaces which can make the wrench turned to the original position. One head of the utility model can be screwed with two (or three) kinds of screw caps with different specifications. After the screw cap is screwed, the screw cap needs not drawing, and the wrench can turn to the new angle until the screw cap is tightened. The utility model can reduce the weight and the quantity of the tools, the operation is serialized, and the work efficiency is improved.

Description

Anti-withdrawal four-head solid wrench

The utility model belongs to the instrument manufacturing and instrument uses department.

The mouth of removing of the existing slow-witted spanner of producing both at home and abroad is two planes parallel to each other, the nut or the parts that can only be adapted to a kind of specification of a slow-witted spanner.Because remove mouthful standard and the nut standard size of various countries' spanner have certain tolerance (remove mouthful big, nut is little), remove mouthful plane when slow-witted spanner uses and have only two very little action plane.Remove and mouthful have only very little area stressed in use, remove a mouthful most of plane and do not contact with nut when stressed, we can say: major part is removed a mouthful plane and is not had stressedly, can remove when other use is arranged.Through overtesting, remove suitable part, not influence when the operator twisted an angle with nut, to counter-rotation, can be return the home position when turning nut, so just can continue to turn.The action that so just prior art can be twisted nut is kept to two (turn, return) by four (turn, extract, corner, aligning nut plane).Make simple to operateization, serialization.Because it is little to remove mouthful close specification difference, utilize the size that changes with dodging the spanner that groove can be done big a kind of specification, one of slow-witted like this spanner just can fastening two kinds or three kinds nuts.

The purpose of this utility model is to release the slow-witted spanner of the convenient use of a class, bull to the domestic and international market.For country saves the high-quality steel, improve user's operating efficiency, alleviate operator's labour intensity.

Fig. 1, Fig. 2 in conjunction with Figure of description illustrate content of the present utility model:

Fig. 1 is the front view of a slow-witted spanner among a kind of embodiment of the present utility model.Fig. 2 is that an end (nominal dimension is 17.19) of a slow-witted spanner in the slow-witted spanner of a cover described in the utility model is example explanation physical dimension and action principle of removing notch portion of the present utility model.

Fig. 2 .0 is that prior art is produced slow-witted spanner schematic diagram.Removing mouthful is two planes parallel to each other, can only adapt to the nut that turns same width, change an angle when spanner turns after, must will remove mouthful all transfer to after, after spanner can being turned over an angle and aiming at the insertion of nut plane again, could continue to move.By the standard of tolerance scope of removing mouthful with nut, the nut size is less than the size of removing mouthful, when turning, remove mouthful with the contacted position of nut on Fig. 2 .0 be 2 points (actual is two-lines) be a, b.Remove mouthful other interior position and do not work in use or, perhaps only help out.The applicant makes model repeatedly through for a long time, the prior art spanner is removed mouthful size change over shape shown in Fig. 2 .1.1, plane or curved surfaces such as 2,3,4,5,6,7,8, wherein 1,2,6,8 is plane and parallel to each other.By the diagram specification is example, distance between 2 planes and 6 planes is 17, distance between 2 planes and 8 planes is 19, distance between 1 plane and 8 planes is 22, select 17,19,22 for adapting to nut similar sizes in the international standard, manufacture a end, the manufacturing on the other end or spanner of other size in other specification at the utility model spanner.Other face of removing mouth is the nut locating surface and must extract the face of dodging that nut just can go back to spanner original position.

Fig. 2,2 for specification be that 17 nut is placed on the situation of removing shown in Fig. 2 .1 in the mouth.Shown in Fig. 2 .2, nut in removing mouth with 2 planes, 6 planes, 4 planes, E plane contact (4,5 planes also curved surface), operator's this spanner that firmly moves in the direction of the clock, a moment is promptly transmitted on 6 planes, 2 planes makes nut change an angle with spanner.Its principle is similar with the slow-witted spanner of the mode of action, active position and prior art, both can play the function of the slow-witted spanner of prior art.

Fig. 2 .3 is that specification 17 nuts are in removing mouth.When the operator forwards nut to a certain angle, needing again spanner to be got back to home position (both Fig. 2 .1 positions) does not need removing of spanner mouthful extracted from nut, only needs by counterclockwise rotating spanner.The last rib with 6 plane contact will enter 7 curved surfaces this moment, and the nut plane with 2 plane contact turns over 2 planes by the rib of removing mouthful depths simultaneously, and this moment is the position shown in Fig. 2 .3 both.Be rotated further make next symmetrical nut plane respectively with 2 planes and 6 plane contact, promptly recover position as Fig. 2 .2, nut and remove between the mouth just and slide in aforementioned process, can not form moment, so nut can keep original position, but remove mouthful corner more than 60 °, the operator can make nut fastening by counterclockwise being rotated further, during loosen nut, only need 180 ° of spanner upsets, can find out clearly that from the above the utility model in the process that tightens or loosens, can accomplish the function of existing technology fully.The slow-witted spanner of the utility model will spanner not be extracted and is removed mouth in use, only needs to rotate the new parallel surface that spanner is aimed at nut round about, so can be described as " exempt to withdraw from four-head and stay spanner ".

Fig. 2 .4 be specification to be 19 nut stay situation in removing at the utility model, nut enters removes mouth, 2 planes, 8 planes and nut plane contact, nut is stopped near 6 planar sections by 7 curved surfaces.Can nut be rotated by the moment of 8 planes and the transmission of 2 planes by counterclockwise rotating at this moment.After turning over certain angle, move in the direction of the clock, enter in 1 plane domain with the outer end on the nut plane of 2 plane contact; The rib that contacts with 7 curved surfaces enters 7 curved surfaces, and being rotated further both can be with new nut planar alignment 2 planes, 8 plane.Go round and begin again and nut can be screwed to the position, if Fig. 2 .4 is a loosen nut, needing to twist handspring when fastening changes 180 °.

Fig. 2 .2 and Fig. 2 .3 are meant that a spanner is suitable for wide 17 nuts, and Fig. 2 .4 refers to that same spanner is suitable for wide 19 nuts, two kinds of same statures of specification width; These two kinds of specifications all need not be extracted from nut removing mouth in use, only need both can use to counter-rotation.A slow-witted spanner has two statures, and two slow-witted spanners that can be made into four specifications are so name of the present utility model is called " exempting to withdraw from the slow-witted spanner of four-head ".

Fig. 2 .5 is that width is 22 the nut situation at the slow-witted spanner of the utility model, can do common slow-witted spanner usefulness under stressed little situation, can find out that from this utility model one can turn slow-witted spanner the nut of six kinds of different sizes.

The advantage that the utility model compared with prior art has: the slow-witted spanner of prior art can only be done two spanner usefulness, and of the present utility model one can do four (or six) spanner usefulness to slow-witted spanner, has increased the function of product.Single or complete manufacturing the utility model product, can be country and save to surpass 50% high-quality steel, for example: the slow-witted spanner of eight covers that prior art is produced, be processed into the spanner of two kinds of specifications with every of the utility model technology, only need three, also Duo a kind of specification than prior art.Therefore can alleviate quantity and the weight that the operator carries instrument greatly.Must not transfer in use owing to remove mouth, make the operation serialization, the person's of simplifying the operation action can be increased work efficiency, and reduces operator's labour intensity.Particularly in the inaccessible place of eyesight, but continuous operation can bring many convenience to the operator.

Implement the factory that producer of the present utility model preferably produces slow-witted spanner, only need the existing mouthful manufacturing procedure of removing is changed into the moulding broaching tool and draws on broaching machine and remove mouth, other operation is constant, even the mould of rough forging also need not be changed.Although prior art is removed mouthful and the utility model technology to remove mouthful be identical in the use, for preferably increasing heat treatment step in service life of raising product.Having ready conditions to thicken the thickness of removing notch portion, removes the intensity of mouth with raising.

Claims (1)

1, the stiff spanner of a kind of four-head, it is characterized in that: working face is made up of planes such as 1,2,3,4,5,6,7,8 or curved surface, wherein 1,2,6,8 is plane and parallel to each other, and being combined into the size that is fit to three kinds of nuts, other face is the nut locating surface and must extract the face of dodging that nut just can go back to spanner original position.

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