CN2569978Y - Lockable adjustable wrench - Google Patents

Abstract

The utility model relates to a lockable adjustable wrench used for the fields of aviation, automobile, machinery, chemical industry, device repair, etc. The utility model comprises a wrench body, a wrench port, a worm, an inner handle, an outer handle and a force transfer lock mechanism. The force transfer lock mechanism is a connecting rod force transfer lock mechanism which is composed of a wrench body, a swing seat, one outer handle and a support plate. The utility model has the traditional characteristics of the adjustable wrench in the normal state. The adjustable wrench has the special functions of clamping, without slip and loosening, etc., in the locking state. The utility model has the advantages of simple structure, compact structure, reliable use and convenient carrying, is suitable to be used for a hand vice, a process clamping plate, a suspension hook, etc., and is the indispensable common tool for the fields of the mechanical maintenance, etc.

Description

A kind of adjustable wrench that can lock

The utility model relates to a kind of adjustable wrench that can lock, is used for securing member fastening and that dismounting flexibly connects, also is applicable to clamping, clamps and hang telephone-moving tool sub-assembly, the versatility hand tools technical field that belongs to equipment, machinery assembling and repair.

Adjustable wrench commonly used mainly by pull body, pull mouthful, worm screw forms.During use, rotate, promote to pull the tooth bar on the mouth, make to pull and mouthful in pulling track body, move, realize the clamping of workpiece or loosen by regulating worm screw.This structure only depends on the friction between worm screw and tooth bar that workpiece is clamped, and its clamping force is little, and when pulling, pulling mouthful easily and a workpiece slippage of adjustable wrench causes workpiece corner angle and surperficial damage.

For addressing this problem, U.S. Pat 4472986 has proposed a kind of improvement project, on the basis of adjustable wrench commonly used, increased a cover four connecting rod retaining mechanism (see figure 1)s will by pull body 1, pull mouthfuls 2, worm screw 3, swing seat 4, outer handle 5, connecting rod 6, spring 7, Internal handle 9 etc. form.Because the inside of pulling the handle 8 of body 1 is cavity structure, thereby not only difficulty of processing is big to pull body 1, and intensity, rigidity are lower; Spring 7 and connecting rod 6 installed wherein, spring 7 easily and handle 8 inwalls collide, be difficult for coordinating to cause the spanner assembling, cause and lock machinery and be difficult to " locked ", do not reach clamping, anti-skidding purpose.Connecting rod 6 is one in addition, and it uses operational stability poor, and the life-span is short; Internal handle 9 afterbodys and outer handle 5 are isometric, and be when discharging locking, not easy to operate; During release conditions, the too big use of the open-width between outer handle 5 and the handle 8 is inconvenient.

At the deficiencies in the prior art, the purpose of this utility model is to provide a kind of adjustable wrench that can lock, and it has adjustable wrench characteristics easy to use, can overcome the deficiencies in the prior art again, locking easily and reliably or release clamping work pieces prevent to damage surface of the work effectively.

Its technical scheme following (seeing Fig. 2, Fig. 3, Fig. 4) for achieving the above object; A kind of adjustable wrench that can lock, it mainly by pull body 1, pull mouthfuls 2, worm screw 3 and four connecting rod retaining mechanisms, locking relieving mechanism form.But four connecting rods of retaining mechanism mainly by pull body 1 power transmission locking worm screw 3 and pull mouthfuls 2 swing seat 4, can be afterburning the outer handle 5 of this mechanism of locking and two support plates 11,12 that play the support and connection effect form, and link together by 15,16,17,18 activities of four axles.The handle 8 of pulling body 1 is solid construction, the cavity of pulling body 1 device swing seat 4 partly has blind hole 14, and the flush type reseting pressuring spring 10 that all the time swing seat 4 (as Fig. 3 view) is had an anticlockwise opplied moment with respect to axle 15 is housed in blind hole 14 and between the plane 21 of swing seat 4.The locking relieving mechanism is made by sheet material, cross section is the middle approximately inside of outer handle 5 of U type, is made up of the Internal handle 9 and the torque spring 13 that resets by axle 19 devices.Internal handle 9 by sheet material make, cross section is the different U type of width, near the axle 19 positions rib shape projection 25 is arranged, behind the device, Internal handle 9 afterbodys are longer than the afterbody of outer handle 5, and the torque spring 13 that resets makes Internal handle 9 paste tightly mutually in the handle 5 and with outer handle 5 outside all the time.

When retaining mechanism is not locked, promptly four connecting rods are in the raw the time, retaining mechanism is to worm screw 3 and pull mouthfuls 2 and do not apply coupling mechanism force, worm screw 3 can manual adjustments, makes to pull mouthfuls 2 and move in the guide groove of plate body 1, as adjustable wrench commonly used, clamp, loosen workpiece 27, or during clamping work pieces 27, pull spanner workpiece 27 is applied twisting resistance, at this moment the clamping force of spanner is little.At this moment, because the effect of reseting pressuring spring 10, with respect to axle 15, swing seat 4 is subjected to an opplied moment all the time, makes quadric chain be in a metastable state, thereby quadric chain is not rocked.

At above-mentioned state as adjustable wrench commonly used during clamping work pieces, handle 8 and outside apply enough big power between the handle 5, will change four connecting rod states, make the quadric chain of nature become the three connecting rod states of stablizing of design, promptly outer handle 5 shaft portion in four connecting rods and support plate 11 (12) shaft portion point-blank or axle 16,17,18 when being in a straight line, four connecting rod retaining mechanisms are in locking or " locked " state.The effect of stage clip 10 makes these three stable connecting rod states more stable.When retaining mechanism is in locking state, outer handle 5 shaft portion and support plate 11 (12) shaft portion are point-blank, they apply huge pressure or apply a huge torsional moment with respect to 15 pairs of swing seats 4 of axle axle 16, and put on the worm screw 3 by swing seat body, pivot pin 20, worm screw 3 is pressed pull mouthfuls 2 tooth bar, to produce huge pressure between the working portion of pulling mouthfuls 2 working portion and pulling body 1 be clamping force thereby form.When this clamping force does not change at the state of retaining mechanism, just remain unchanged always.Under huge like this clamping force active force, reverse pull spanner tight because of or dismounting workpiece 27, just can not cause spanner and duration part slippage.Even under the state that clamps, can hang the object that is connected with workpiece that moves enough weights by spanner.

It is very simple to discharge retaining mechanism, when retaining mechanism is in locking state, discharges locking operation at any time.Outside pulling body handle 8 and stretching out between the afterbody of the Internal handle 9 of handle 5 afterbodys, apply little power, the rib shape of Internal handle 9 projection 25 with pull body and collided in 8 corresponding positions 26, and be fulcrum with position 26, utilize leverage, the major part position of Internal handle 9 can return to the linkage that is in three connecting rod states four connecting rod states of nature freely with regard to the outer handle 5 generation displacements of jack-up gently, removes retaining mechanism to worm screw 3 and the clamping force of pulling mouth 2.Can resemble adjustable wrench commonly used subsequently again neatly and use this spanner.

Compare with prior art, the utlity model has following advantage: pulling the body handle portion is solid construction, and strength rigid is good, and processing and manufacturing is simple, and cost is low; Adopt the flush type stage clip to stablize linkage, assembling is easy, and linkage is convenient to assembling and is coordinated, and improves assembly precision easily; Adopt torque spring that Internal handle 9 is resetted, Internal handle 9 utilizes rib shape projection 25 to discharge locking state, and outer handle 5 parts become the afterbody of straight shape and Internal handle 9 to grow outer handle 5 substantially, make common people use the utility model spanner just in accordance with the wish, simple to operate, freely; In addition because the effect of stage clip 10, when spanner is in relaxation state fully, shake spanner rocking between can generation activity four connecting rods, the same because effect of stage clip 24 can not produce because shaking of spanner makes worm screw 3 and pull rocking between mouthfuls 2 yet.

Attached: Fig. 2～4 show a specific embodiment.

Fig. 1: a kind of four link lock spanners.

Fig. 2: a kind of adjustable wrench that can lock.

Fig. 3: the cutaway view of adjustable wrench.

Fig. 4: the part figure of adjustable wrench.

Fig. 2, Fig. 3, handle alive shown in Figure 4, it by pull body 1, pull mouthfuls 2, worm screw 3 and retaining mechanism, relieving mechanism etc. form.Retaining mechanism is made of four connecting rods of quadric chain the appropriate section of pulling body 1, swing seat 4, outer handle 5, four parts of support plate 11 (12) (two), more than four parts by 15,16,17,18 movable bindings of four axles, the interior device of inner chamber of pulling body 1 has worm screw 3, swing seat 4, and have in the blind hole 14 and between the plane 21 of swing seat 4 reseting pressuring spring 10 is housed, worm screw 3 is housed in the groove of swing seat 4, on the pivot pin 20 between the end face 23 of the plane 22 of swing seat 4 and worm screw 3, stage clip 24 is housed.The pressure that stage clip 24 produces acts on the worm screw 3, makes worm screw 3 and pull between mouthfuls 2 the tooth bar to be in the impaction state that certain pressure is arranged always.

Relieving mechanism mainly is made up of with the axle 19 that is connected them with Internal handle 9 that is installed on it and torque spring 13 outer handle 5, and rib shape projection 25 is arranged on the Internal handle 9, and the afterbody of Internal handle 9 grows beyond the outer handle afterbody.

Pull body 1 as required and can be made into spline-simulating etc. with the working portion of pulling mouthful 2 clamping work pieces.

Claims (2)

1, a kind of adjustable wrench that can lock, it pulls body 1 by comprising, pull mouthfuls 2, worm screw 3, swing seat 4, outer handle 5, Internal handle 9 etc. are formed, of the present utility model being characterised in that: the handle 8 of pulling body 1 is solid construction, and pulling in the inner chamber of body 1 device swing seat 4 has blind hole 14; In blind hole 14 and between the plane 21 of swing seat 4, flush type reseting pressuring spring 10 is arranged; The support plate of retaining mechanism is two 11 and 12; On the axle 19 that handle 5 is connected with Internal handle 9 reduction torsion spring 13 that Internal handle 9 and outer handle 5 are contacted is all the time arranged outside; There is rib shape projection 25 at position at Internal handle 9 close axles 19.

2, the adjustable wrench that can lock according to claim 1 is characterized in: compression spring 24 is arranged on the pivot pin 20 between the inner plane 22 of the end face 23 of worm screw 3 and swing seat 4.

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