DE2321808A1 - SCREW WRENCH FOR THE AUTOMATIC SCREWING OF MULTI-EDGED SCREWS AND NUTS - Google Patents

Description

233-20.649Ρ (2Ο.65OH) April 30, 1973

VUMA Vfrskunuxfr ustav mechanizacie a automatizacie. Nove Mesto nad Vahom (CSSR )

Wrench for automatic screwing polygonal bolts and nuts

The invention relates to a ring wrench for automatically screwing polygonal screws and nuts.

When screwing polygonal screws by hand and Nut is usually the wrench size with the counter shape identical to the polygonal screw or nut, since with this manual screwing method the ring spanner comes first is pushed onto the polygonal screw or nut before the torque acts on the wrench begins.

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233- (S 7859) -Sd-r (9)

232180a

At. the automatic screwing of polygonal screws and nuts opens the turning key the stationary screw or nut pushed on. In such a case is only slight when using a ring spanner for hand screwing Probability that the moment the key touches the polygonal screw or nut the functional form of the key and the screw or nut side walls be in such a relative position that an instantaneous insertion of the key on the polygonal screw or nut take place can.

The key is only pushed on after mutual friction between the key and the nut, which causes wear on the polygonal screw or nut. There is also the possibility that the key is not pushed open at all, which causes jams and malfunctions in the automatic screwing.

The listed disadvantages are significantly reduced with the key for the automatic screwing of the polygonal screws and nuts. The principle of this ring spanner is that an opening is arranged in the key body, the diameter of which exceeds the diameter of the circle "e" of the n-edged screw or pattern, the inner wall of the key body is equipped on the circumference with supports, which between them Form an angle OC which is smaller than the central angle β of one side of the n-edge of the screw head or the nut.

40980 9/0 819

By executing the key according to the invention several advantages are achieved, e.g. B. that the Functional form of the key the deferral of the key on the polygonal screw or nut not only in one position, but in a considerable angular range against the relative rotation of the key, which enables the polygonal screw or nut. Another The advantage is that when using this key there is the possibility of an immediate deferral of the turning key on the stationary screw or »nut is significantly increased, which also the reliability of the automatic screw connection increases accordingly.

The key for the automatic screwing of polygonal screws and nuts according to the invention is shown in exemplary embodiments in the drawing.

Show it:

1 shows the cross section of the ring spanner for hexagonal screws and nuts;

Fig. 2 shows the cross section of the ring spanner for square screws and nuts.

In the key body 1, a cylindrical opening is made in such a way that its diameter is greater than the diameter of the "e" circle of the η-edged screw h or nut 5. On the inner wall 3 of the key body 1, supports 2 are attached, which are arranged in such a way that

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232180'e

that between the individual supports 2 the angle oC is formed, which is smaller than the central angle β of one side of the η-edged screw head k or the nut 5. The supports 2 are triangular in shape, with at least one of their functional sides having the same geometric shape as one side of the screw 4 or the nut.

4.Ü9 8CS / -0 8Ί 9

Claims (1)

Claim Ring wrench for automatically screwing polygonal screws and nuts, characterized in that an opening is made in the ring body (1), the diameter of which is greater than the diameter of the ^M e ^w circle of the η-edged screw head or the nut, and that on the inner wall (3) of the annular body (i) at its circumference supports (2) are arranged such that the angle Ot formed between the individual supports (2) is smaller than the central angle β of one side of the η-edged screw head (6) or the mother (k) is. 409809/0819 Read more