CN87212522U

CN87212522U - Protective cover for bolts and nuts

Info

Publication number: CN87212522U
Application number: CN 87212522
Authority: CN
Inventors: 朱培德; 张惠良
Original assignee: Wuxi Hongsheng Shuguang Plastic Product Factory; SUZHOU PERMANENT WAY SECTION SHANGHAI RAILWAY SUB-BUREAU
Current assignee: Wuxi Hongsheng Shuguang Plastic Product Factory; SUZHOU PERMANENT WAY SECTION SHANGHAI RAILWAY SUB-BUREAU
Priority date: 1987-11-25
Filing date: 1987-11-25
Publication date: 1988-09-07

Abstract

The utility model discloses a protective cover for bolts and nuts which is used for the fastening the spring strip fastener of the railway spring strip fastener section. The utility model is formed by the injection molding of the high-pressure polyethylene and is used to cover the denudation parts of the bolts and the nuts. Because the structural shape of the protective cover of the nuts is identical to the denudation parts of the bolts and the nuts, the oil coating is reduced, the early volatilization and drain of the anti-rust oil film is effectively prevented, the period of the oil coating is prolonged, and the service life of the fastener is prolonged.

Description

Protective cover for bolts and nuts

It is antirust that the utility model belongs to what machinery.

As shown in Figure 1, elastic bar fastener 1, fastening bolt 2, nut 3 and the packing ring 5 that use in railway elastic bar fastener location, when mounted, must coat butter at the exposed surface of bolt 2 and nut 3,, be vulnerable to ambient influnence because the exposed spatial area of bolt, nut is big, and be subjected to the sewage of train discharging, the pollution corrosion of dirt, behind surperficial butter drying shrinkage, the very fast corrosion of bolt 2 and nut 3 causes the corrosion of dismantling difficulty and bolt nut from now on to scrap.Owing to the early stage drying shrinkage of butter makes the oiling cycle asynchronous with the line maintenance cycle, increase the oiling workload.In order to prevent the corrosion of antirust butter drying shrinkage and securing member, available technology adopting taper plastic bushing 6 as shown in Figure 1, the exposed part that garden cylindricality nut protective jacket 4 entangles bolt 2 and nut 3, to prevent the early stage drying shrinkage and the loss of antirust butter, prolong the oiling cycle and the application life of elastic bar fastener securing member.But it is inconsistent with the external form of nut 3 by what protective jacket 4, protective jacket 4 is enclosed within on the nut 3 not closely connected, effective topped property is relatively poor, make that being coated with oil mass increases, because the elastic bar fastener securing member is a large amount of accessories that use on railway line, every kilometer needs securing member 7300 to overpay approximately, and the annual oiling that for this reason consumes has very big economic worth.The aspect is bigger by the space between what protective jacket 4 and the nut 3 in addition, more easily come off by the influence of wind and rain and train vibration, protective jacket 4.Aspect again, high temperature resistant, the ageing resistace of existing plastic bushing and protective jacket and low temperature resistant, resistance to brittle fracture can be also not ideal enough, influences application life.

The purpose of this utility model is the planform that changes the nut protective jacket, makes the assemblage gap that reduces between protective jacket 4 and the nut 3, has improved the effective topped property of 4 pairs of nuts 3 of protective jacket, and minimizing is coated with oil mass, the minimizing oiling is artificial.Improve material and additive, prolong the application life of bolt, nut protective jacket.

Bolt described in the utility model, nut protective jacket are installed later state as shown in Figure 2.The inwall of nut protective jacket 4 pastes mutually with the head of nut 3 and bolt 2, has reduced the gap between nut 3 and the protective jacket 4.The bottom of protective jacket 4 and plain washer 5 closely connected contacts.

The detailed structure of nut protective jacket 4 as shown in Figure 3, Figure 4, Fig. 4 is the vertical view of Fig. 3.

As shown in Figure 3, the crossette A of nut protective jacket 4 is the garden column construction with top, and the diameter of the bigger what fastening bolt of its inwall is so that entangle the afterbody of fastening bolt; Crossette A be hexgonal structure with the lower part so that the appearance profile of topped hex nut effectively.For just what is installed, at the port of protective jacket 4 gradient of guide angle, guide angle being arranged is 1:20～1:30.

As shown in Figure 4, the little note of convex railway is arranged at the top of nut protective jacket 4.

For the instructions for use that reaches bolt, nut protective jacket and prolong its application life, it is material that bolt described in the utility model, nut protective jacket are selected polyethylene from high pressure process for use, and adds additive ultra-violet absorber carbon black (1.5) and antioxidant zho(1.5).

Elastic bar fastener fastening bolt, the nut that use in railway elastic bar fastener location, adopt bolt described in the utility model, nut protective jacket 4, can prevent the early stage volatilization and the loss of antirust oil film effectively, prolong the oiling cycle of securing member greatly, can make all period interval of oiling and line maintenance cycle synchronisation, make original annual oiling operation, change an oiling operation in 5 years into.Alleviated surfaceman's labour intensity greatly.Nut protective jacket 4 can also completely cut off aqueous vapor, acid, alkali, salt, mud and all kinds of organic solvent.Prevent fastening bolt, nut corrosion, prolonged life-span of securing member, line facility is maintained a good state.Select for use polyethylene from high pressure process to make material by what, can meet the injection mo(u)lding requirement.And additive arranged: ultra-violet absorber carbon black (1.5) and antioxidant zho, make protective jacket can meet physics, chemistry, machinery and the thermoelectricity capability of use needs, arranged long application life.

The protection of the securing member of plant equipment such as other facility beyond bolt described in the utility model, the also available what railway elastic bar of the nut protective jacket fastener, vehicle, boats and ships.

Bolt described in the utility model, nut protective jacket can form series by bolt, nut dimension series.

Fig. 2, Fig. 3, railway elastic bar fastener fastening bolt, nut protective jacket shown in Figure 4 are embodiment of the present utility model.Fig. 2 is the state of installing and using of elastic bar fastener fastening bolt, nut protective jacket, protective jacket 4 when mounted, its bottom with plain washer 5 closely connected.The inwall of protective jacket 4 pastes mutually with the exterior contour of nut 3 and the head of bolt 2, protects the exposed part of screw bolt and nut, prevents the drying shrinkage of antirust oil film.As shown in Figure 3, protective jacket 4 crossettes are the garden column construction with top, and the little note of convex railway is arranged at the top of entangling the protruding protective jacket 4 of fastening bolt afterbody.Crossette A is a hexgonal structure with the lower part, entangles the hex nut outer wall.Port is gradient to be the guide angle of 1:30, and just what is installed, and selecting polyethylene from high pressure process for use is material, and additive ultra-violet absorber carbon black (1.5) and antioxidant zho(1.5 are arranged), the injection mo(u)lding better performances, application life is longer.

Claims

1, a kind of elastic bar fastener fastening bolt, nut protective jacket that uses in railway elastic bar fastener location is made of taper plastic bushing 6 and garden cylindricality nut protective jacket 4.Of the present utility model being characterised in that: the crossette A of nut protective jacket 4 is the garden column construction with top, the diameter of the bigger what fastening bolt of its inwall; Crossette A is hexgonal structure with the lower part.It is 1: 20～1: 30 that the port of nut protective jacket 4 has the gradient of guide angle, guide angle, and convex railway insignia is arranged at the top of nut protective jacket 4.

2, fastening bolt as claimed in claim 1, nut protective jacket by the polyethylene from high pressure process injection molded, and have additive ultra-violet absorber carbon black (1.5) and antioxidant Zho(1.5).