CN100431795C

CN100431795C - Jaw chunck structure of flexible spanner

Info

Publication number: CN100431795C
Application number: CNB2006101521181A
Authority: CN
Inventors: 吴传福
Original assignee: Proxene Tools Co Ltd
Current assignee: Proxene Tools Co Ltd
Priority date: 2006-09-13
Filing date: 2006-09-13
Publication date: 2008-11-12
Anticipated expiration: 2026-09-13
Also published as: CN1939668A

Abstract

A jaw clamp structure of adjustable wrench has a fixed jaw and a movable jaw, which have a force acting surface with at least one force applying rib and one slot. Said fixed jaw has an obliquely extended lower end to form a contact surface in contact with one end of the slide way of movable jaw. It features that said force applying rib can apply a force to the center on one side of any nut and said slot can prevent the angle of nut from being worn off.

Description

The jaw structure of monkey wrench

Technical field

The relevant a kind of monkey wrench of the present invention is meant that especially a kind of preventing belongs to the hand-held tool technical field because of being subjected to the clamping switching to produce the monkey wrench jaw structure that the nut angle is worn down to fillet.。

Background technology

Press, open end wrench instruments such as open-end wrench and monkey wrench all utilize the both sides face of the jaw actinal surface clamping switching nut of two jaws, with the lock that carries out nut, unload operation.

But, when the jaw actinal surface clamping switching nut two parallel edges faces of two jaws lock, when unloading, because of open-end wrench the mouth be wider than the nut opposite side distance from, though and monkey wrench can push against nut two parallel edges faces, but above both after the application of force, the torsion of two jaw switchings then can change into the active force to nut totally, application point also drops on the diagonal angle of this nut, and form the shortcoming that general so-called nut angle is worn down to fillet, for lock, unload the dangerous doubt of this nut meeting once more backward; Edge is, just the advanced open-end wrench case that proposes to overcome as U.S. Patent number No. 5878636, No. 3916735, No. 191892, No. 5152198 and No. 1632911 etc. above-mentioned disappearance is arranged; In addition, though domestic No. 586469 " spanner structure-improved " patent of bulletin that has jaw and chute surface to be non-perpendicular form got permission, but U.S. Patent number also has the preceding case that is non-perpendicular form No. 1309860, the inventor had before also proposed inboard protruding wall and the groove design of forming of two jaws of open end wrench in addition, to prevent that the Republic of China that the nut angle is worn down to fillet from announcing No. 302793 and No. 547249 patent obtains the approval of an ancient unit of weight office and vouchsafe patent.

Thereby, above-mentioned state, inside and outside many open end wrenches two jaw structural designs of getting permission, prevent that the nut angle is worn down to the effect of fillet though have, but all only limit to general nut and come the pre-groove size than regular size, or the nut that falls into this pre-set dimension has its effectiveness, this kind situation is for open monkey wrench, because movable jaw is wide for adjusting with the mouth of fixed jaw, be not wide as the mouth of open-end wrench be fixing a certain distance, and nut various different specification sizes of tool not only, the two has metric system again, the branch of two kinds of kenels made in Great Britain, moreover the nut of same internal thread specification, branch because of the load weight is arranged again, and make the length of side of nut, or opposite side distance from kind become more various, and the nut of the close specification of part, its length of side is very approaching again, cause the uncertain variable in the clamping to increase, so that the Prior Art that the above-mentioned inventor of comprising had before got permission, all can't allow the nut perseverance of all interior various different specification sizes of certain scope remain in the groove of jaw, using the nut angle that reaches all various different specification sizes can be protected; Duty is, how to make the nut of the various different specification sizes of two jaw clamping switchings of monkey wrench, all can reach the protection effect that the nut angle is not worn down to fillet, is the advanced actively direction of improvement of hand-held tool industry invariably.

Summary of the invention

At the problem of above-mentioned existence, the object of the present invention is to provide a kind of nut nut angle of causing when being subjected to the clamping switching of various different specification sizes that prevents to be worn down to the monkey wrench jaw structure of fillet.

For achieving the above object, monkey wrench fixed jaw of the present invention and movable jaw opposite end respectively are formed with a jaw actinal surface, also there is an oblique extension bottom of fixed jaw and the face that holds of connection monkey wrench chute surface one end, and two jaw actinal surface inboards at least respectively are formed with an application of force wall and a groove, and wherein the extension line of the jaw actinal surface of fixed jaw and slide-bar axial line are 65 °～85 ° slanted angles.

When the present invention is resisted against the jaw actinal surface of fixed jaw respectively and holds face when any two fillet faces of all size size nut, horizontal slip movable jaw, the application of force wall of this activity jaw inboard, just can be against the about middle position of limit face of various different specification size nuts, make its stressed nut angle keep the unsettled shape that do not contact with two jaw actinal surface perseverances, when the spanner application of force, can prevent that the nut angle is worn down to the facts generation of fillet.

Description of drawings

Fig. 1 is the jaw structure partial stereo appearance figure of monkey wrench of the present invention.

Fig. 2 is the overall appearance floor map of monkey wrench of the present invention.

Fig. 3 is the view of monkey wrench clamping big nut of the present invention.

Fig. 4 is the view of nut in the monkey wrench clamping of the present invention.

Fig. 5 is the view of the little nut of monkey wrench clamping of the present invention.

Fig. 6 is the inboard application of force wall of the movable jaw of monkey wrench of the present invention, along the schematic diagram of datum line slip.

Fig. 7 is a size dimension nut limit line of face,mounting schematic diagram.

Fig. 8 is the schematic diagram of 16 ° of size dimension nut inverse clock rotations.

[primary clustering symbol description]

1------body 10------shank

20-----head 21------fixed jaw

211----jaw actinal surface 212-----application of force wall

213----holds face 214-----groove

22-----chute 221-----chute surface

The movable jaw of 23-----storage tank 24------

241----jaw actinal surface 242-----application of force wall

243----flat face 244-----groove

The 25-----control is to assembly 30------big nut

The little nut of nut 30b-----among the 30a----

Face B-------nut angle, A------limit

B1-----nut angle X-------slide-bar axial line

X1-----datum line X2------horizontal line

The Y------extension line

The specific embodiment

Shown in Fig. 1,2, the jaw structure of the relevant a kind of monkey wrench of the present invention, the icon example is taken off mainly and is comprised:

One monkey wrench body 1, shank 10 1 ends of this body 1 are extended with the head 20 of an expansion shape, head 20 1 end one are extended with a fixed jaw 21, laterally then offer a chute 22, and this chute 22 also is with the storage tanks 23 at the default place of head 20 and vertically runs through connected relation; In the chute 22 and be installed with one can free slippage movable jaw 24, this activity jaw 24 also is the engagement shape or the shape of bonding with control in the storage tank 23 to assembly 25, rotate this control in order to do profit and be able to the movable jaw 24 of synchronous interlock when the assembly 25 along chute 22 lateral displacements, use the folder mouth distance that changes two jaws, is to be example structure narration with the worm screw of commonly using most as for control to assembly 25 graphic examples, and the utilization of in fact controlling to assembly also must be button handsetting (Button), block type piece (Wedge memB er) or other any movable jaw tong that reaches, the equivalence techniques means of electronic control slippage.

The present invention mainly focuses on the structure innovation design of head two jaws, wherein, fixed jaw 21 is formed with a jaw actinal surface that is parallel to each other 211,241 with movable jaw 24 subtend end faces, two jaw actinal surfaces, 211,241 inboards also are provided with an application of force wall 212,242 (shape of application of force wall must be implemented aspect for arc or trapezoidal etc.), and the face that holds 213 of fixed jaw 21 jaw actinal surfaces 211 bottom surfaces and oblique extension and connection chute surface 221 1 ends pastes the usefulness of supporting in order to nut one side face; In addition, the jaw actinal surface of fixed jaw 21 211 inboard application of force walls 212 with hold face 213 confluces and be formed with a groove 214 so that each nut angle B falls into; As for movable jaw 24 jaw actinal surfaces 241 inboard application of force walls 242, be to be arranged with a default long groove 244 by 243 of front end flat faces to be formed, each nut angle B1 then falls into this groove 244; The jaw actinal surface 211 of two jaws again, 241 extension line Y and horizontal slide-bar axial line X adopt skewed angle design (two jaw jaw actinal surfaces of present embodiment are to adopt the state of be arrangeding in parallel, so embodiment is the jaw actinal surface with two jaws is the structure narration, when if the jaw actinal surface of the jaw actinal surface of movable jaw and fixed jaw is adopted non-parallel design, the benchmark of this slanted angle is a measuring basis with the jaw actinal surface of fixed jaw then, close chat earlier bright), two jaw actinal surfaces 211,241 extension line Y and the slanted angle Θ permissible range that slide-bar axial line X is gone be 65 °～85 ° between, but best slanted angle is the embodiment of the best with 74 °.

Refer again to shown in Fig. 3 to 5, jaw actinal surface 211,241 inboards of two jaws of monkey wrench of the present invention respectively form an application of force wall 212,242, merge repeatedly clamping test data again, especially two jaw actinal surfaces 211,241 and slide-bar axial line X are to tilt 74 ° of angle shapes, can guarantee movable jaw 24 moving process in fact, its inboard application of force wall 242 permanent convergence and the large, medium and small nut 30 that is held, middle positions of 30a, 30b nut limit face A of keeping are replaced;

The present invention adopts 74 ° of main causes with jaw actinal surface and slide-bar axial line X can see through then that Fig. 6 to Fig. 8 further specify, at first please refer to shown in Figure 7, each nut angle B of large, medium and small size is overlapped same point, and the central point of pairing each the nut limit face A of nut angle B is linked to be a datum line X1, this datum line X1 can pass through nut angle B point, other has a horizontal line X2, is to be vertical with each nut limit face A, and the angle Θ b of this datum line X1 and horizontal line X2 just is 16 °;

Cooperate again with reference to Fig. 6, shown in 8, edge is, the present invention for maintenance activity jaw 24 when fixed jaw 21 directions advance each size nut of clamping, movable jaw 24 inboard application of force walls 242 can be replaced the about middle position of nut limit face (as shown in Figure 6 with the permanent maintenance level of each size nut, datum line X1 and axial line X are parastate), the datum line X1 and the horizontal line X2 while counterclockwise that have only Fig. 7 rotate 16 °, as shown in Figure 8, this moment, datum line X1 and horizontal line X2 angle Θ a still maintained 16 °, when application of force wall 242 that can permanent maintenance activity jaw 24 advances towards fixed jaw 21, this application of force wall 242 is resisted against each size nut limit face A middle position, and principle side's extension line (or jaw actinal surface extension line of fixed jaw) of deriving monkey wrench two jaw actinal surfaces of the present invention is 74 ° of slanted angle structural designs with slide-bar axial line X by this.

Seeing through above-mentioned design can make each size nut angle B, the B1 perseverance of two jaw actinal surface clampings drop on two jaw actinal surfaces, 211,241 inboard grooves, 214,244 places in fact, extremely shown in Figure 5 as Fig. 3, in the time of can guaranteeing to utilize monkey wrench clamping various sizes of the present invention size nut, nut angle B, B1 must and 211,241 maintenances of two jaw jaw actinal surfaces unsettled not against shape, and then when overcoming known monkey wrench clamping and exceeding the outer nut of pre-set dimension, cause the nut angle that is held to be worn down to the disappearance of fillet easily.

The jaw structural design of monkey wrench of the present invention can prevent thoroughly that not only new nut is worn down to outside the advantage of fillet because of normal nut angle B, the B1 that takes place after being subjected to the clamping switching, more because the application of force wall 212 of geometrical clamp of the present invention, be to depart from the suitable distance of nut angle B, and the application of force wall 242 permanent centers of supporting nut limit face A of movable jaw, be further from nut angle B1, although be the old nut that has been worn down to fillet, under the monkey wrench two jaw innovative designs of the present invention, the also additional utility that can reach firm clamping and lock smoothly, unload.

Claims

1, a kind of jaw structure of monkey wrench, shank one end of this monkey wrench is formed with a head, head one end is extended with a fixed jaw, head laterally then offers the storage tank of a chute and vertical communication chute, the chute content is provided with a movable jaw, movable jaw is also adjusted two a jaws folder mouthful size by the control in the storage tank to the assembly interlock, it is characterized in that:

Fixed jaw and movable jaw opposite end respectively are formed with a jaw actinal surface, also there is an oblique extension jaw actinal surface bottom of fixed jaw and the face that holds of connection chute surface one end, and the jaw actinal surface inboard of two jaws at least respectively is formed with an application of force wall, the extension line of the jaw actinal surface of this fixed jaw is 65 °～85 ° angles relations with horizontal slide-bar axial line again, when large and small size nut, when being resisted against the jaw actinal surface of fixed jaw and holding face, horizontal slip movable jaw, the application of force wall of this activity jaw inboard just can be against the about middle position of each large and small size nut limit face.

2, the jaw structure of monkey wrench according to claim 1 is characterized in that, the extension line of described fixed jaw jaw actinal surface and the angle of slide-bar axial line are 74 °.

3, the jaw structure of monkey wrench according to claim 1 and 2 is characterized in that, the jaw actinal surface of described fixed jaw and movable jaw is parallel shape.

4, the jaw structure of monkey wrench according to claim 1 is characterized in that, described application of force wall is an arc or trapezoidal.

5, the jaw structure of monkey wrench according to claim 1 is characterized in that, the jaw actinal surface of described fixed jaw is formed with a groove with the corner intersection that holds face, is formed with a groove between inboard application of force wall of the jaw actinal surface of movable jaw and upper end flat face.