CN2923200Y - Opening type double offset-ring spanner - Google Patents

Abstract

An open type box spanner consisting of a handgrip and a plate formed card connector being mounted on said handgrip. The opening of said card connector is formed by meander lines of segments having the same length: 10 to 16 segments are connected from top to end in turn, one segment subtending at the adjacent segment at an angle of 120 degrees. Convex angles are staggered with respect to recess angles one by one, all vertexes of convex angles are located on the circumferences of the same circumcircle, the length of each segment is (2-*)R, in which, R is the radius of said circumcircle. The utility model reduces the spanner angle of said card connector, it can replace existing solid wrench and is applicable for spanner angles less than 60 degree while more than 30 degree.

Description

The open type double offset ring spanner

One, technical field

The utility model belongs to small tool, is the solid wrench technical field specifically.

Two, background technology

Spanner is mainly used in the bolt connection piece on fastening or the teardown of engine equipment, exactly is fastening or the dismounting nut.Nut is to be hexagon mostly, and therefore, in the existing spanner, the bayonet socket shape of solid wrench or adjustable wrench is the part of regular hexagon or positive limit shape, as, the bayonet socket of solid wrench is generally regular hexagon, and the bayonet socket shape of adjustable wrench is made of orthohexagonal four limits.Existing spanner in use, promptly fastening or dismounting is during nut, if under the prerequisite that the back-up wrench original position remains unchanged, nut is pulled 60 °, spanner just can block the next face of six-sided nut.That is to say, the use of existing spanner is limited in 60 ° the slewing area, if the scope of activities of some spanners less than 60 ° specific occasion under, as fastening, the dismounting of railway road fork nut, existing standard spanner (activity or fork spanner) often is difficult to operate.In this case, generally, both expended man-hour, again labor intensive by means of instruments such as pipe wrench, hammer, awls.

Three, utility model content

The purpose of this utility model provides a kind of open type double offset ring spanner, normally using under less than 60 ° occasion in the spanner scope of activities.

This novel purpose is achieved in that a kind of open type double offset ring spanner, form by handle and the clamping head that is fixed on the handle, the clamping head is a plate, its bayonet socket folding lines that the identical line segment of many length is formed of serving as reasons: 10-16 bar line segment is tail, the first connection in turn, angle is 120 ° between adjacent two line segments, and outer salient angle in the above-mentioned angle and indent are contended one and are provided with alternately, and the summit of all outer salient angles is positioned on the circumference of same circumscribed circle, and the length of every line segment is Wherein, R is this external radius of a circle.

In the technique scheme, the bayonet socket shape of spanner clamping head comes down to the part by the 30 ° of outer contours that form of a rotation (center of circle with the regular hexagon circumscribed circle is the center) in two regular hexagons that size is identical, the center of circle overlaps.Therefore, the snap-latch surface of the bayonet socket of this novel spanner is on the basis of six snap-latch surfaces of existing fork spanner, increased by six snap-latch surfaces again, promptly the snap-latch surface of this novel spanner increases to 12 from six of existing spanner, and the conversion of adjacent snap-latch surface also is decreased to 30 ° from 60 ° of existing spanner.From another point of view, this novel spanner only need rotate 30 °, just can switch to another snap-latch surface.Be not difficult to draw, this novel spanner the spanner scope of activities less than 60 °, greater than 30 ° situation under, can must switch snap-latch surface freely, reach purpose fastening or the dismounting nut.

Basis is novel than the beneficial effect that existing spanner had to be:

1, solved the technical problem that the people that exist for many years turn a blind eye to already

Existing spanner is long-term used in people's work, the life, is generally pulling under the unrestricted situation of angle according to the bayonet socket of the regular hexagon of nut design, and it deserves to be called a good tool really.But, in some specific pulling in the angle occasions with limited,, being subject to external factors such as roadbed as the adjustment of railway road fork nut, fastening, existing spanner is often powerless, is difficult to a helping hand of helping others.The inventor has researched and developed this novel spanner at this people's nothing to be surprised at, the technical problem of being accustomed to, and it has solved existing spanner and has pulled the difficult problem of angle less than 60 ° (promptly can not normally use).

2, originally novel can be the regeneration product of existing fork spanner

This novel spanner both can 60 ° switches snap-latch surfaces, again can 30 ° switches snap-latch surfaces.And when the card face of this novel spanner engaged with six square nuts, its clamping area did not reduce, identical with existing fork spanner still, and therefore, the transfer function of pulling active force does not reduce, so it can substitute existing fork spanner fully.

Four, description of drawings

Fig. 1, Fig. 2 are respectively front view and the left views of this novel first embodiment;

Fig. 3 is the profile along the A-A line shown in Figure 1;

Fig. 4 Fig. 5 Fig. 6 be respectively this novel second and third, the front view of four embodiment.

Five, the specific embodiment

Fig. 1 illustrates, and this novel open type double offset ring spanner is made up of handle and the clamping head that is fixed on the handle; The section configuration of handle is illustrated by Fig. 3, and Fig. 1 and Fig. 4, Fig. 5 (three's a clamping bayonet socket 2a shape is identical, and difference only is the opening direction difference of clamping head) and Fig. 6 show the basic configuration (or structure) of two kinds of bayonet sockets respectively.

Clamping head shown in Fig. 1 is a plate, its bayonet socket 2a folding lines that the identical line segment of many length is formed of serving as reasons: 16 line segments are tail, the first connection in turn, angle is 120 ° between adjacent two line segments, and outer salient angle in the above-mentioned angle and indent are contended one and are provided with alternately, the summit of all outer salient angles is positioned on the circumference of same circumscribed circle, and the length of every line segment is Wherein, R is this external radius of a circle.Among Fig. 1, A1, A2, A3, A4, A5, A6, A7, A8, A9 ... be the summit, the tail end of line segment A1A2 (A2) is connected with the head end (A2) of line segment A2A3, similarly, the tail end of line segment A3A4 (A4) is connected with the head end (A4) of line segment A4A5, the angle of line segment A1A2 and A2A3 is 120 ° (being as the criterion with the angle less than 180 °, down together), and is defined as interior re-entrant angle; The angle of line segment A2A3 line segment A3A4 is 120 °, and is defined as outer salient angle; Be not difficult to draw, have 7 outer salient angles in the folding line that above-mentioned 16 line segments are formed, 8 interior re-entrant angles, 7 outer salient angles are concyclic, promptly be positioned on the circumference of same circumscribed circle, therefore, if circumscribed circle (it is the circumscribed circle of the pairing regular hexagon nut of spanner) radius is R, according to plane geometry, the length that can calculate each line segment in the above-mentioned bayonet socket folding line is

The bayonet socket of clamping head can also be by 15,14,13 (Fig. 6 illustrates), 12,11 or 10 folding lines that line segment is formed in a manner described among Fig. 1.The spanner of this bayonet socket can be used for some specific applications.

Among Fig. 4 Fig. 5, the bayonet socket shape of clamping head is identical, and just the direction of angulations difference is promptly different with the position that handle connects.Its clamping head is plate (the clamping head is actually integrated setting in bayonet socket), its bayonet socket 2a is shaped as the folding line of being made up of many line segments: 16 line segment tail, first connections in turn that length is identical, angle between adjacent two line segments is 120 °, and outer salient angle in the above-mentioned angle and indent are contended one and are provided with alternately, the summit of all outer salient angles is positioned on the circumference of same circumscribed circle, and the length of every line segment is Wherein, R is this external radius of a circle.We can say that also the bayonet socket shape is the formed outer contour in another orthohexagonal 3 limits (exactly being to be less than 4 limits more than 3 limits) by 30 ° of orthohexagonal four limits and deflections.

Among Fig. 6, the clamping head is a plate, its bayonet socket 2b is shaped as the folding line of being made up of many line segments: 13 line segment tail, first connections in turn that length is identical, angle between adjacent two line segments is 120 °, and outer salient angle in the above-mentioned angle and indent are contended one and are provided with alternately, the summit of all outer salient angles is positioned on the circumference of same circumscribed circle, and the length of every line segment is

Wherein, R is this external radius of a circle.We can say that also bayonet socket is shaped as the formed outer contour in another orthohexagonal 2 limits (exactly be more than 2 limits, be less than 3 limits) of 30 ° of orthohexagonal three limits and deflections.

Claims (8)

1. open type double offset ring spanner, form by handle and the clamping head that is fixed on the handle, it is characterized in that: described clamping head (2) is a plate, its bayonet socket (2a) folding lines that the identical line segment of many length is formed of serving as reasons: 10-16 bar line segment is tail, the first connection in turn, angle is 120 ° between adjacent two line segments, and outer salient angle in the above-mentioned angle and indent are contended one and are provided with alternately, and the summit of all outer salient angles is positioned on the circumference of same circumscribed circle, and the length of every line segment is (2- ) R, wherein, R is this external radius of a circle.

2. open type double offset ring spanner according to claim 1 is characterized in that: the line segment of described opening folding line is 16.

3. open type double offset ring spanner according to claim 1 is characterized in that: the line segment of described opening folding line is 15.

4. open type double offset ring spanner according to claim 1 is characterized in that: the line segment of described opening folding line is 14.

5. open type double offset ring spanner according to claim 1 is characterized in that: the line segment of described opening folding line is 13.

6. open type double offset ring spanner according to claim 1 is characterized in that: the line segment of described opening folding line is 12.

7. open type double offset ring spanner according to claim 1 is characterized in that: the line segment of described opening folding line is 11.

8. open type double offset ring spanner according to claim 1 is characterized in that: the line segment of described opening folding line is 10.

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