CN2034891U

CN2034891U - Stepless self-adjustable and fixable multifunction wrench

Info

Publication number: CN2034891U
Application number: CN 88202175
Authority: CN
Inventors: 蒋小钢
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-03-31
Filing date: 1988-03-31
Publication date: 1989-03-29

Abstract

The utility model relates to a manually multi-functional fastening tool which is composed of a vice body, a vice jaw and a pin shaft. The utility model utilizes the lever principle to automatically adapt the tightened and slackened clamping of the crew nut, the bolt, the pipes and other heterotype workpieces. Compared with the present common used tools, such as the adjustable wrench and pipe wrench, the utility model is provided with multi-function features and can be simultaneously used as kinds of dimensional adjustable wrench and pipe wrench. The utility model can automatically adjust different dimensional workpieces. The utility model has the advantages of reliable clamping, easy use, simple structure (the utility model can be composed of three parts only), easy manufacture, low cost, small volume, light weight, etc.

Description

Stepless self-adjustable and fixable multifunction wrench

The utility model belongs to mechanical hardware ﹠ tools field, particularly relates to a kind of hand controlling tools apparatus with monkey wrench and pipe wrench performance.

Traditional back-up wrench can not adapt to the workpiece requirement of many sizes, the use of monkey wrench commonly used at present is also inconvenient, at first need according to different workpiece and size (as the nut of various sizes), regulate the monkey wrench span of jaw in advance, it is fastening just to carry out clamping then, monkey wrench can only holding workpiece two faces, when carrying out the fastening or lax clamping of big strength, owing to regulate the strain of inaccuracy and jaw, spanner very easily skids off and defective work piece from workpiece by force, and monkey wrench can't carry out the clamping of prismatic class workpiece.And pipe wrench is limit owing to the structure of itself, then inconvenience is used for the clamping of the workpiece (as nut etc.) of other shapes except that prismatic class, and pipe wrench also has and the similar shortcoming of monkey wrench, as at first needing according to different workpiece and size, regulate span of jaw in advance, it is fastening just to carry out clamping then, also very easily skids off and defective work piece etc. by force from workpiece.

The object of the present invention is to provide a kind of broad of adaptation size range requirement that has, can make monkey wrench and pipe wrench class instrument simultaneously, can regulate adaptation various sizes workpiece automatically, chucking power is directly proportional with fastening force, the instrument that chucking power is directly proportional with workpiece size.

A kind of structure example of the present invention as shown in Figure 1, accompanying drawing 2, accompanying drawing 3, accompanying drawing 4 are fundamental diagram.

Among the figure: (1) jaw body, (2) jaw body pin-and-hole, (3) vice body, (4) vice body pin-and-hole, (5) curved section, (6) bearing pin, (7) nut.

Main points of the present invention are: be processed with the aperture that adapts to various workpiece shapes (such as polygon, abnormity etc.) on the jaw body (1), jaw body (1) is connected with vice body (3) by pin-and-hole (2), pin-and-hole (4) with bearing pin (6), the jaw body (1) after connecting can be around the relative vice body of bearing pin (6) axis (3) Free in a scope. When workpiece is carried out work, vice body (3), jaw body (1) jointly form leverage with workpiece workpiece are applied chucking power and fastening (relaxing) power, an end or two ends at vice body (3) are curved section (5), its characteristics are that each point is unequal to the distance of pin-and-hole (4) on the curve, on the face of curved section through-thickness, process effigurate teeth groove (line) or annular knurl.

Operation principle of the present invention is as follows: (referring to accompanying drawing 2, accompanying drawing 3, accompanying drawing 4), when beginning during holding workpiece (during as nut (7) (as accompanying drawing 2 situations, nut (7) is inserted in aperture on the jaw body (1), after external force P begins effect, because the jaw physical efficiency is freely rotated with respect to vice body around bearing pin, and become situation as shown in Figure 3, under external force P effect, jaw body (1) and vice body (3) are jointly around Z ₁Axle is (promptly perpendicular to X ₁-Y ₁Axle) when rotating, vice body (3) will rotate with respect to jaw body (1) around Z axle (promptly perpendicular to X-Y axle), change to the distance of bearing pin Z because vice body upper curve section (5) goes up each point, M, N section clamp nut jointly on 1 S on the curve and jaw body.And according to lever principle, when external force P increased (also promptly the fastening force of nut being increased), it was also big more to act on the pressure that S orders, (also promptly the chucking power to nut is also big more).Because each point is unequal to the distance of pin-and-hole on the curved section, the clamping to the various sizes workpiece is realized in the position that vice body is ordered by S on the change curved section, after the S point is close to workpiece, because the effect of the inclined-plane (wedge shape) of curved section will produce big normal pressure (chucking power) to workpiece.

Under the constant situation of power arm L and external force P, because resistance arm D(also is the distance of S point to pin shaft hole) variation (resistance arm D increases with workpiece size and reduces), thereby realized the design that chucking power increases with workpiece size, in addition, carrying out as tubing, during piece-holder such as post material (as shown in Figure 4), inclined-plane (wedge shape) effect by M, N, 3 clampings of S and leverage, curved section and the teeth groove (line) of curve end face or annular knurl increase the resistance effect to be realized.When needs changed the tightening state of workpiece, only needing that vice body is turned over turnback (around X-axis) can realize.

The invention has the advantages that: have and to adapt to larger size range, possess simultaneously Adjustable wrench and pipe wrench class tool performance, can stepless automatic adjusting adapt to the various sizes workpiece, chucking power is directly proportional with fastening force and chucking power is directly proportional with workpiece size, and clamping is reliable, easy to use, simple in structure, be easy to make, cost is low, volume is little, and is in light weight etc.

Implement technology required for the present invention, material and be ordinary skill and the material that modern industry is produced.

Claims

1, a kind of stepless self-regulation chucking multifunctional wrench, by the jaw body, vice body, bearing pin is formed, it is characterized in that: with bearing pin by pin-and-hole on the jaw body and the pin-and-hole on the vice body, jaw body and vice body are coupled together, jaw physical efficiency after connecting is freely rotated relative to vice body around the bearing pin axis in a scope, and vice body after connecting and caliper are a kind of leverages of forming by jaw body and vice body, inclined-plane (wedge shape) effect of the curve of vice body end (face) section and the teeth groove (line) on vice body end curve (face) section or annular knurl increase common vice body and the jaw body connector of realizing the chucking clamping of workpiece of resistance effect.

2, multifunctional wrench according to claim 1 is characterized in that: the aperture that has one or more adaptation polygons, special-shaped workpiece shape on the jaw body;

3, multifunctional wrench according to claim 1 is characterized in that: have one or more pin-and-holes on the vice body, be communicated with (or not being communicated with) with groove between pin-and-hole;

4, multifunctional wrench according to claim 1 is characterized in that: an end of vice body or two ends are curve (face) shape, are teeth groove (line) or annular knurl on the end face of curve (face) section.