CN87215074U

CN87215074U - Self-adjustable ratchet wrench for use as a hand hammer

Info

Publication number: CN87215074U
Application number: CN 87215074
Authority: CN
Inventors: 田芸
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-11-09
Filing date: 1987-11-09
Publication date: 1988-08-10

Abstract

The utility model discloses a self-adjustable ratchet wrench used as a hand hammer, which is composed of an upper claw, a top plate, a rotary shaft, a handle, a tension spring and a hammer surface. In the using process, the utility model can automatically clamp the nuts with different sizes and rotate the handle in certain direction to screw nuts, or rotate the handle to other direction, and the nuts slip or skip. The utility model can implement self-adjustment and screwing for various nuts, screw bolts, and hydraulic coupling joints. The hammer surface can be used as a hand hammer to knock objects.

Description

Self-adjustable ratchet wrench for use as a hand hammer

The utility model belongs to hardware ﹠ tools, can be used for twisting nut, bolt, hydraulic fitting, can work as hand hammer usefulness again.

The common instrument of existing this class has monkey wrench, and it can not self-regulated during use, and sour jujube twists.See that again domestic and international close patent has CN85201859, US4594922, the spy opens clear 53--117900 ［ 4 ］, clear 53--45799 ［ 4 ］, and GM8316654, CN85201400 can not snap on the nut for preceding two kinds in use from the side.Though the self-regulated of middle two kinds of energy can not be twisted by fine sour jujube.Last two kinds all is that with three working faces 3 block principle mutually and sting jack panel and realize twisting, this just must press the following base angle of hex nut with curved surface, in order to prevent to skid, on curved surface, must be provided with big profile of tooth and bite the nut base angle, the nut that just will bite unavoidably, more than each design all can not make hand hammer and use.

The utility model is to use simple structure, can be as snapping into as the normal activity spanner on the nut that varies in size from the side and 2 of only tightening automatically with two working faces block principle mutually and bite nut, be formed in and be not provided with big profile of tooth on the chucking face, and in twisting, do not damage the structure of nut.Make things convenient for twisting, and oppositely just can skid during twisting and jump the limit, realize that sour jujube is stubborn, and have the design of hand hammer function concurrently.

The utility model is made up of dewclaw 1, top board 6, rotating shaft 7, extension spring 10, handle 11, the flat side of a hammer 12.

The dewclaw inside top is stung spiral shell angle 3, and uropore 8 is arranged at the bottom, a working face that is stressed in operation stinging Luo Jiao and be inboard, dewclaw top be positive limit 2 and with the non-working surface that is not stressed in operation be that side 4 constitutes.Side can be straight line or curve.It is neighbouring from positive limit at a distance that uropore is positioned at positive limit aft terminal vertical line rear side again, and there is the flat side of a hammer 12 at the dewclaw back, is used to knock the hard plane of object, makes to the utlity model has the hand hammer function.

Card top curved surface 5 and axis hole 9 are arranged on the top board, and card top curved surface is one and is designed to all can block the tangent convex surface in each nut base not of uniform size of stinging ［ in the nut and just one side of leaning on mutually, limit right limit claim the base ］ with it at it when rotating shaft is rotated.By the stinging the spiral shell angle and can constitute Contraband shape card screw socket direction of dewclaw, axis hole and uropore pine are changeed riveted with rotating shaft with card top curved surface.

Handle is rigidly attached to the top board below, extension spring one end prolong knot is in the aperture of dewclaw bottom, other end prolong knot is in the handle intermediate channel, its pulling force should make the card screw socket be in closure state gently all the time, the card screw socket just opens during like this with the dewclaw top at front end place, the positive limit of nut pushing tow, be used to sting the card nut, with compounding practice.

Because uropore is positioned at positive limit aft terminal vertical line rear side nearby, uropore and axis hole also are positioned at this place after by the rotating shaft riveted.Card top curved surface is can to block the nut base that all size stung differs tangent with it when rotating shaft is rotated at it, in the operation, two working faces promptly block top curved surface 5 to be stung by 2 A and B with positive limit 2 and blocks nut, and again because of under the effect of rotating shaft C point, formation is subjected to triangle of forces ABC ［ to see Fig. 1 ］.Because the A point is closely by rear end, positive limit, at positive rear end, limit vertical line rear side, at a distance, the B point on the nut base, causes ∠ ACB very little again to the C point from positive limit again.When therefore dwindling direction ［ being forward ］ rotary handle by the card screw socket, the car coat end face will produce self-locking action to nut, sting jack panel and together rotate.Oppositely then occur skidding during the switching handle and jump the limit, realize that sour jujube twists.

Because in twisting nut process, have only positive limit and two working faces of card top curved surface, and in fact real stressed just point of contact B and sting an A, realized that block principle and structure mutually at 2.This curved surface is tangent, 2 structures of card mutually, and under the very little situation of ∠ ACB, self-lock force is very big in the twisting nut, and therefore design tooth profile working face not was not only convenient but also do not damage the nut profile during in order to twisting.

The utility model part is few and easily make, and is easy to use, realized nut self-regulated not of uniform size. Sour jujube twists, and reasonable stress, can be used as hand hammer again. Its performance that is same principle that present similar tools has no and structure also is to compare.

Figure of description 2 numberings are: 1 dewclaw, and 2 positive limits, 3 sting Luo Jiao, 4 sides, 5 card top curved surfaces, 6 top boards, 7 rotating shafts, 8 uropores, 9 axis holes, 10 extension springs, 11 handles, 12 flat side of a hammers.

Claims

1, a kind of self-regulated sour jujube that can the double as hand hammer twists monkey wrench, it is characterized in that it by dewclaw, top board, and rotating shaft, extension spring, handle, the flat side of a hammer is formed, and dewclaw is furnished with stings Luo Jiao, uropore and the flat side of a hammer.Sting Luo Jiao and be a working face by inboard, dewclaw top and be positive limit adjacent with another with it can be that the non-working surface of straight line or curve is that side constitutes.There is card top curved surface the top board upper end, and axis hole is arranged at the bottom, by stinging Luo Jiao and blocking the direction that the top curved surface can form Contraband shape card screw socket, with rotating shaft axis hole and uropore pine is changeed riveted.Being connected below the top board of handle rigidity.

2, the self-regulated sour jujube of the described double as hand hammer of claim 1 twists monkey wrench, it is characterized in that the uropore of dewclaw is positioned at positive limit aft terminal vertical line rear side nearby from positive limit at a distance.

3, the self-regulated sour jujube of the described double as hand hammer of claim 1 twists monkey wrench, it is characterized in that card top curved surface is one and all can blocks each tangent convex surface in nut base not of uniform size of stinging with it at it when rotating shaft is rotated.

4, the self-regulated sour jujube of the described double as hand hammer of claim 1 twists monkey wrench, it is characterized in that extension spring one end prolong knot on the dewclaw bottom in the hole, and other end prolong knot is in the handle intermediate channel, and its pulling force should make the card screw socket be in closure state gently all the time.

5, the self-regulated sour jujube of the described double as hand hammer of claim 1 twists monkey wrench, it is characterized in that it is the flat side of a hammer 12 that there is a hard plane that is used to knock object at the dewclaw back.