CN2382885Y - Concealed roller anti-theft screw nut - Google Patents

Abstract

The utility model relates to an anti-dismounting and theftproof screw nut, which is composed of a screw nut main body, an arc-shaped contraction shrink groove which is connected with a screw thread surface of the screw nut and is arranged on the screw nut main body, and a roller which is arranged on a wide side end of the arc-shaped contraction groove. The arc-shaped contraction groove is an arc-shaped contraction groove in a blind hole shape which opens from a bottom surface to top, after the utility model is installed, and the roller is completely hidden in the screw nut main body. The anti-dismounting performance and the theftproof performance are enhanced, and the utility model can replace the existing various anti-dismounting and theftproof screw nut to use.

Description

Stealthy roller anti-theft nut

The utility model relates to a kind of non-removable anti-theft nut.

Bolt is widely used in various occasions as a kind of link.Since nut can with the screw rod spinning in and out, therefore, by being gone into illegal dismounting, the incident of stealing the member that bolt connects happens occasionally.For preventing that nut from illegally being dismantled, a kind of anti-theft nut has appearred at present, the inner headed face that this anti-theft nut ties up to nut offers one one big, a little arc-shaped slot along its axial direction, is placed with the corresponding roller of stub end width of its external diameter and groove at the stub end of this arc-shaped slot.When the nut precession, roller is in the stub end position of groove all the time with the rotation of nut, and the precession that does not influence nut is tightened and put in place.When oppositely screwing out nut and since the backward rotation of nut will drive roller from the stub end of groove to microcephaly's end motion, thereby roller can't be moved and stuck playing in former nut screwing clamping position prevents unloading antitheft effect.The shortcoming of this anti-theft nut is because its groove of laying roller is a groove, after installing, the roller that plays limitation locking is exposed visible, the mounting point of nut be in connected piece below during overhead positions, by positive and negative turn nut repeatedly, cause roller loosening in groove easily and drop out groove voluntarily and lose the anti-effect of unloading.Even at other station is installed, visible roller also can be gone out by the tool holder of tweezers class and destroy it and prevent unloading theftproof performance.

The purpose of this utility model then is the above-mentioned shortcoming at existing anti-theft nut, its roller is hidden in the stealthy roller anti-theft nut that can't take out in the nut body fully after a kind of installing is provided.

The purpose of this utility model is to realize by original groove being changed into this technological scheme of pit type blind hole groove.Specifically by nut body, open the arc retraction slot that joins with the nut thread face on nut body and the roller that is placed on this arc retraction slot broadside end is constituted, described arc retraction slot is a blind hole shape arc retraction slot that upwardly opens from the nut bottom surface.During screw-in, the motion of nut makes roller follow nut motion and is positioned at the stub end of groove all the time, the lower end surface of nut touches mutually with the end face of connected piece and tightens, be arranged in groove roller the outer end also with regard to the end face institute shutoff of connected piece at the retraction slot of nut and form " concealing " shape.Because this retraction slot is the blind hole shape groove that does not penetrate into the nut upper surface from the nut bottom surface along its of axially upwardly opening, and therefore, can't see this roller from the upper surface of nut.When oppositely screwing out nut,, therefore place restrictions on the reversing motion of nut, play the recessive anti-antitheft purpose of unloading owing to the reason of the diameter of roller makes it and can not roll to the small end of groove.

Upwards and being connected in the operation of level screw-in nut, roller all can remain on better in the curve bath and finish the connection operation smoothly.When downwards screwing in the connection operation of nut, for preventing deviating from voluntarily of roller, can be inserted in a plain nut in advance, roller is withstood on the lower surface of this anti-theft nut by the upper surface apical grafting of this plain nut, screw in two nuts more synchronously and get final product.Another benefit of this mounting type is to tighten this anti-theft nut again after can utilizing plain nut to finish installation, debugging.Also can adopt adhesive tape earlier with the notch capping with the roller cap seal in groove, or with butter etc. the roller plug is got lodged in and to make it unlikely in the groove and in the screw-in process, drop out.

The utility model has the advantages that the roller that will play lock function is hidden in the nut body fully, install the back, just it taking-up can't be destroyed also that it prevents unloading, theftproof performance from can't see roller in appearance at all.Thereby it has the stronger anti-anti-theft that unloads.And the outward appearance after installing seems also do not have difference with plain nut.Being particularly suitable for replacing the existing various anti-anti-theft nut that unloads uses.

Provide embodiment below in conjunction with accompanying drawing.

Fig. 1 structural representation of the present utility model

The worm's eye view of Fig. 2 Fig. 1

Fig. 3 scheme of installation of the present utility model

Referring to Fig. 1-3, circular arc retraction slot 2 be a bottom surface 3 from nut body 1 along its blind hole shape groove that axially upwardly opens, the degree of depth of its groove is advisable to account for 4/5 of nut height.Its number also can be optionally uniform a plurality of.The external diameter of roller 4 is consistent with the width of the stub end of groove.Length is advisable with the height that slightly is shorter than groove.5 is that bolt, 6,7 is that two connected pieces, 8 are plain nut among Fig. 3.

Claims (2)

1, stealthy roller anti-theft nut, by nut body, open constituting on nut body, it is characterized in that described arc retraction slot is a blind hole shape arc retraction slot that upwardly opens from the nut bottom surface with nut thread face arc retraction slot that joins and the roller that is placed on this arc retraction slot broadside end.

2, stealthy roller anti-theft nut as claimed in claim 1, the degree of depth that it is characterized in that described arc retraction slot is 4/5 of a nut height.

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