CN2255895Y

CN2255895Y - Universal clyburn spanner

Info

Publication number: CN2255895Y
Application number: CN 96233367
Authority: CN
Inventors: 刘光辉
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-07-08
Filing date: 1996-07-08
Publication date: 1997-06-11
Anticipated expiration: 2006-07-08

Abstract

The utility model provides a universal adjustable spanner, which is composed of a crank with an involute working surface, a clamping hook of which the V-shaped included angle is 60 DEG, and a pivot shaft which is hinged with the crank and the clamping hook, wherein, the distance that the center of the pivot shaft deviates from the angular bisector of the clamping hook with the V-shaped included angle is a, and the distance that the center of the pivot shaft deviates from the top of the clamping hook with the V-shaped included angle is 3a. _The involute of the working surface in the crank takes the center of the pivot shaft as the center of the circle in a base circle, and the base radius is a, and the expanded scope of the involute is from 0 DEG to 100 DEG. The automatic clamping work piece has no phenomena of slip, bite or seizure, and the utility model which can replace an active adjustable spanner, a solid spanner, a pipe thread tongs, etc. has big operating space.

Description

Omnipotent universal screw wrench

The utility model relates to a kind of hand tools, particularly relates to a kind of omnipotent universal screw wrench.

The design form of universal screw wrench is more, and wherein based on pipe wrench, Chinese patent CN2066795U has introduced a kind of self-tightening type pipe wrench, and this kind pipe wrench has the handle that involute surface is decided jaw, the movable clamp port of 60 ° of V-arrangements and the rotating shaft that the two is hinged.Movable clamp port and decide the pincers tooth that jaw is provided with deflection, because the setting of pincers tooth, nothing has increased the contact stress between jaw and workpiece with fixed attention; this is injury-free unfavorable to the protection workpiece; in addition, the hardness of jaw and the requirement of processing technology are also higher, cause manufacturing cost to increase.

The purpose of this utility model is to provide a kind of serviceability more to optimize, but the omnipotent universal screw wrench of line of specifications specification.

The omnipotent universal screw wrench of the utility model is to realize like this, it is by the handle with involute shape working face, the V-arrangement angle is that 60 ° chucking hook and the hinge that the two is hinged are formed, the distance of hinge misalignment chucking hook V-arrangement angle angular bisector is a (a hinge center-biased distance), the distance on hinge misalignment chucking hook V-arrangement angle summit is 3a, handle working face involute is to be the basic circle center of circle with the hinge center, a is a base radius, 0 °～100 ° of involute spreads, wherein handle can be that an end has the working face that cooperates with chucking hook.Also can be that its two ends have the working face that cooperates with chucking hook respectively, the latter be that the omnipotent universal screw wrench of two kinds of different sizes of collection is an one, has enlarged the scope of application.Can be on chucking hook two medial surfaces embedding with liner so that the workpiece that is held of protection better, liner is generally metallic aluminium or copper, or rubber, Merlon etc. are nonmetal.The utility model is because the involute shape working face of center-biased, wedge action is arranged when holding workpiece, as shown in Figure 3, the handle of effect lever amplifies l/a with power F and doubly comes holding workpiece, and workpiece is three directions clamped (three direction on the workpiece circumference 120 ° at interval), this kind structure has big chucking power, under the situation of not considering wedge action, the suffered chucking power summation of workpiece is 3 * l/a F, the chucking power summation can be bigger after considering wedge action, do not skid so this kind structure can not produce.The workpiece of while handle clamping different size in 95 ° of slewing areas, its wedging angle α changes in 90 °～30 ° scope, does not kill phenomenon so workpiece and jaw also can not produce.Owing to set the hinge center-biased, be the workpiece of (2～0.9) a in addition, and by determining several a values, standard go out the omnipotent universal screw wrench specification of series applicable to the cross section inscribed circle diameter apart from à.

The course of work of the omnipotent universal screw wrench of the utility model is, after the chucking fastener is taken the workpiece of being removed commentaries on classics, handle connects the certain orientation rotation application of force, and a chucking mouthful opening dwindles clamping work pieces, wedging, advance face and remove the commentaries on classics part, otherwise, the handle reverse rotation application of force, the workpiece clamping force disappears, and the chucking after-opening magnifies workpiece and jaw gets loose.

Advantage of the present utility model is that serviceability is superior, automatic clamping work pieces, the operating space is big, do not have between workpiece and omnipotent spanner jaw alive and skid or kill, bite phenomenon, can replace present spanner alive, stiff hand, pipe silk pincers on the market fully, be applicable to the clamping of hexagonal prism (as hex nut, stud head, six a prismatic class etc.), cylinder (as pipe, axostylus axostyle class cylinder) workpiece and rotate dismounting.

Describe the utility model embodiment in detail below in conjunction with accompanying drawing.

Fig. 1～Fig. 2: the utility model structural representation

Fig. 3: the utility model working state figure

The omnipotent spanner alive of the utility model is by the handle 1 with involute shape working face, and the V-arrangement angle is that 60 ° chucking hook 2 and the hinge 3 that the two is hinged are formed, and is embedded with liner 4 on 2 liang of medial surfaces of chucking hook.The distance of hinge misalignment chucking hook V-arrangement angle angular bisector is a, the distance on hinge misalignment chucking hook V-arrangement angle summit is 3 a, handle working face involute is to be the basic circle center of circle with the hinge center, and a is a base radius, 0 °～100 ° of involute spreads.

Claims

1, a kind of omnipotent universal screw wrench is by the handle with involute shape working face, the V-arrangement angle is that 60 ° chucking hook and the hinge that the two is hinged are formed, the distance that it is characterized in that hinge center higher chucking hook V-arrangement angle angular bisector is a, the distance on hinge misalignment chucking hook V-arrangement angle summit is 3a, handle working face involute is to be the basic circle center of circle with the hinge center, a is a base radius, 0 °～100 ° of involute spreads.

2, omnipotent universal screw wrench as claimed in claim 1 is characterized in that handle one end has the working face that cooperates with chucking hook.

3, omnipotent universal screw wrench as claimed in claim 1 is characterized in that the handle two ends have the working face that cooperates with chucking hook respectively.

4, omnipotent universal screw wrench as claimed in claim 1 is characterized in that being embedded with liner on chucking hook two medial surfaces.