CN201013697Y

CN201013697Y - Screw head linkage recess structure improvement

Info

Publication number: CN201013697Y
Application number: CNU200720005758XU
Authority: CN
Inventors: 林登鸿
Original assignee: FENGPENG INDUSTRY Co Ltd
Current assignee: FENGPENG INDUSTRY Co Ltd
Priority date: 2007-02-17
Filing date: 2007-02-17
Publication date: 2008-01-30
Anticipated expiration: 2017-02-17

Abstract

The utility model discloses an improvement to the screw head coupled recess structure. The utility model is proposed in order to solve the problems that the existing screw head coupled recess easily chamfers, slips or is deformed, etc. a plurality of projections which are concave inwards are arranged on the inclined wall surface of the recess of the coupled recess which the screw head is provided with. The projection can be the projection provided with two side inclined wall surfaces or three side inclined wall surfaces and the inclination angle of each side inclined wall surface is the same with that of the inclined wall surface of the recess. The utility model has the advantages that the coupled tool is easy to be embedded, inserted and coupled, the utility model has excellent stability when the coupled rotation is implemented, the structure strength of the coupled recess ontology is excellent, etc.

Description

The improvement of screw terminal interlock cave structure

Technical field

The utility model relates to a kind of screw terminal interlock cave structure improvement.

Background technique

The shape of the interlock depression that supplies hand tools plant interlock that general screw top end is set has in-line, cross, quadrangle and hexagon; Because in-line and criss-cross interlock depression are easily because of stressed chamfering, distortion, therefore can be used in the utensil of generally not being strict with the packing effect installs and uses, and for require spiral shell put the higher utensil of firm effect (as machinery, commercial plant, facility ... or the like) then because spiral shell is established the requirements of tightness height, so to the also relative raising of stressed requirement of strength of the interlock depression of screw or bolt top end.

Yet, though have the interlock depression now the polygon design has been arranged, and a plurality of stressed walls have been arranged, when hand tools intercalation rotation interlock torsion was big, the interlock depression is possibility chamfering, slippage or distortion still, so that the hand tools slippage can't the application of force be stablized interlock.

The model utility content

In order to solve the easy chamfering of interlock depression, slippage or distortion, so that the hand tools slippage can't the application of force stablizes the problem of interlock, and the utility model provides a kind of screw terminal interlock cave structure improvement.

The depression skew wall face of the set interlock depression of screw terminal is provided with the projection of a plurality of convexes, and projection can be the projection with both sides skew wall face or three skew back walls, and the angle of inclination of each skew back wall of projection is identical with the angle of inclination of depression skew wall face.

The utlity model has the stability and the interlock depression body that have excellence when the interlock instrument is easy to intercalation interlock, interlock rotation and have advantages such as excellent structural strength.

Description of drawings

Fig. 1 is the utility model screw terminal interlock depression embodiment one;

Fig. 2 is the 2-2 sectional drawing of Fig. 1;

Fig. 3 is the utility model screw terminal interlock depression embodiment two;

Fig. 4 is the 4-4 sectional drawing of Fig. 2.

Embodiment

As Fig. 1, Figure 3 shows that two embodiments of the screw terminal interlock depression of screw terminal interlock cave structure of the present utility model improvement: the depression skew wall face 21 of screw terminal 1 set interlock depression 2 is provided with the projection 3 of a plurality of convexes, projection 3 can be the projection with both sides

skew wall face

31,32 or three

skew back walls

31,32,33, and the angle of inclination of each

skew back wall

31,32,33 of projection 3 is identical with the angle of inclination of depression skew wall face 21.

As shown in Figure 1 and Figure 2, the depression skew wall face 21 of the interlock depression 2 that screw terminal 1 top of this screw is set is provided with the projection 3 of a plurality of convexes, this projection 3 has both

sides skew wall

31,32, the angle of inclination of

skew wall

31,32 is identical with the angle of inclination of depression skew wall face 21, and the angle that projection 3 both sides skew walls are 31,32 is acute angle A, and angled end is an arc round angle 30.

As shown in Figure 3, Figure 4, the depression skew wall face 21 of the interlock depression 2 that screw terminal 1 top of this screw is set is provided with the projection 3 of a plurality of convexes, this projection 3 is the trapezoidal projection with three

skew back walls

31,32,33, and the angle of inclination of projection 3 each

skew back wall

31,32,33 is identical with the angle of inclination of depression skew wall face 21.

Designed projection 3 each skew back wall angle of inclination and the identical design in depression skew wall face 21 angles of inclination in the interlock depression 2 of the present utility model, can reach effects such as having preferable stability when the interlock instrument is easy to intercalation interlock and interlock rotation, and interlock depression body also has excellent structural strength.

Therefore, screw terminal interlock cave structure of the present utility model improvement not only has the practical effect of essence and the lifting of effect, and general known screw do not possess identical depression feature, and the utility model is progressive, novelty, practical design really.

The above is preferred embodiment of the present utility model only, is not to be used to limit protection domain of the present utility model.

Claims

1. screw terminal interlock cave structure improvement, it is characterized in that, the described depression wall that is arranged at the interlock depression on screw terminal top is provided with the projection of a plurality of convexes, each sidewall of projection is the skew wall face, depression wall between between projection and projection then is the skew wall face of arc in addition, and the angle of inclination of each skew back wall of angle of inclination and projection of the skew wall face of arc is identical.

2. screw terminal interlock cave structure improvement as claimed in claim 1, it is characterized in that, described projection can be the projection with both sides skew wall face, and the angle of inclination of projection both sides skew wall face is identical with the angle of inclination of the arc skew wall face of depression, and the angle between the skew wall face of projection both sides is an acute angle, and the angled end of acute angle is an arc round angle.

3. screw terminal interlock cave structure improvement as claimed in claim 1 it is characterized in that described projection can be the trapezoidal projection with three skew back walls, and the angle of inclination of trapezoidal projection three skew back walls is identical with the angle of inclination of the arc skew wall face of depression.