CN2422481Y

CN2422481Y - Loosing-proof rust-proof screw nut

Info

Publication number: CN2422481Y
Application number: CN 00217252
Authority: CN
Inventors: 陈义钊
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-04-10
Filing date: 2000-04-10
Publication date: 2001-03-07
Anticipated expiration: 2010-04-10

Abstract

The utility model relates to a pair of loosing-proof rust-proof screw rod and screw nut, which is characterized in that the screw parts of the screw rod and the screw nut are sprayed (or coated) with a layer of plastic layer. After the screw rod and the screw nut of the utility model are used for fastening, because the plastic coating layer material has definite elastic damping function, the plastic material can generate pushing extrusion and deformation under the action of the pushing extrusion of the screw after the screw and the screw nut are tightly screwed; the plastic material fills up the interspace of the screw; definite reverse resistance can be generated; the utility model can achieve the anti-loosing and tightening functions. The utility model is suitable for connecting components with anti-impact with low-frequency and lower impact strength; when in use, because the plastic layer is separated from outside air, the corrosion of the oxidation and electric potential difference is difficult to generate; the utility model has the anti-corrosion function.

Description

Can locking antirust screw rod nut

The utility model relates to the designing technique of threaded fastener, gets final product the screw rod nut of anti-loose anti-corrosion after especially a kind of the screwing.

In the using processs of screw thread class fastening piece after screwing member such as existing screw rod (bolt) nut, because of being subjected to extraneous long-term ill-effect: comprise various impact shocks, suffer oxidation and potential difference corrosion or the like, make the screw rod nut produce loosening influence and connect tightness, that have even come off, seriously influence the usability or the working life of whole member or device.

The purpose of this utility model is that design is a kind of can be anti-loose and screw rod (bolt) nut of anti-corrosion, makes this class threaded fastener can vibrationproof shock-resistant, thereby has better tightness, anti-corrosion and be connected sealing.

The utility model is realized with following technological scheme: this screw rod (bolt) nut still contain outside thread and (or) female thread portion, it is characterized in that one deck plastic coating being arranged in helical thread portion spraying (or coated).

With bolt and nut of the present utility model fastening after, because the plastic coating material has certain elastic damping effect, add screw rear thread push, make plastic material generation pile-up, distortion, clogged the screw thread space, and produce certain reverse resistance, reach locking fastening effect.The utility model is applicable to that the member that anti-low frequency impacts and impact strength is very not high connects, because the isolated ambient air of plastic layer makes oxidation and potential difference corrosion be difficult to take place, plays the anti-corrosion effect in the use.

Below in conjunction with accompanying drawing embodiment concrete structure of the present utility model is described in further detail.

Fig. 1 is the structural drawing signal that the male thread portion of a kind of screw rod (or bolt) is coated with plastic layer.

Fig. 2 is the partial structurtes schematic representation (enlarged view) that the male thread portion of screw rod is coated with plastic layer.

Fig. 3 is the structural representation that the female thread portion of nut also is coated with plastic layer.

Fig. 4 is the partial structurtes schematic representation (enlarged view) that the female thread portion of nut is coated with plastic layer.

Wherein: 1～screw rod (or bolt), the male thread portion of 2～screw rod, 3～plastic layer, 4～nut, the internal thread plastic layer of 5～nut.

With reference to accompanying drawing as can be known, the utility model also can have following technical characterstic when specific design is made:

One, at every kind of threaded connector, the utility model both can be only when implementing on the outside thread of screw rod (bolt) 1 or only on the internal thread of nut 4, be coated with one deck plastic layer, internal and external threads that also can whole screw rod (bolt) or nut partly all be coated with plastic layer.Only only on screw rod or screw connector, spray plastic layer, purpose is only to consider that separately (at this moment member itself has been made interior or outside thread when making the connection fastening piece of member with screw rod or nut, be the secondary some that is threaded), also can play the anti-loose effect of anti-corrosion preferably.

Two, the plastic layer that sprays (or coated) should have suitable thickness, should equate with the fit tolerance of internal and external threads, maybe can be slightly less than its fit tolerance.

Claims

1, a kind of can locking antirust screw rod nut, it is characterized in that being coated with one deck plastic layer at the helical thread portion of screw rod (1) and nut (4).

2, according to claim 1 can locking antirust screw rod nut, it is characterized in that both can only on the outside thread of screw rod (1), being coated with one deck plastic layer (3), also can only on the internal thread of nut (4), be coated with one deck plastic layer (5).

3, according to claim 1 and 2 can locking antirust bolt and nut, it is characterized in that the plastic layer thickness that is sprayed should equate with the fit tolerance of internal and external threads, also can be slightly less than its fit tolerance.