CN2906178Y - Integrated impregnated theftproof bolt - Google Patents
Integrated impregnated theftproof bolt Download PDFInfo
- Publication number
- CN2906178Y CN2906178Y CN 200620083895 CN200620083895U CN2906178Y CN 2906178 Y CN2906178 Y CN 2906178Y CN 200620083895 CN200620083895 CN 200620083895 CN 200620083895 U CN200620083895 U CN 200620083895U CN 2906178 Y CN2906178 Y CN 2906178Y
- Authority
- CN
- China
- Prior art keywords
- nut
- screw
- cavity
- screw rod
- screw nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The utility model relates to an integrated impregnated theftproof bolt, which comprises a screw nut and a screw which is screwed into the screw nut; wherein the head of the screw has a lifting eye structure, a cavity is provided in the screw nut, an internal screw thread is provided in the entrance of the screw nut and has a smaller internal diameter than the cavity of the screw cavity and the other end of the screw nut is sealed, an oil hole and a sealing screw for the oil hole is provided on the screw nut with cavity. The utility model is characterized in that an unthreaded cylindrical end is provided at the end of the screw, a transverse through type rounded pin hole is provided in the cylindrical end, a cylindrical catch pin is mounted in the rounded pin hole and the two ends of the rounded catch pin both respectively reach out of the side of the cylindrical end. The length of the cylindrical end provided at the end of the screw is long enough to ensure that the screw thread on the screw does not contact the screw thread in the entrance of the screw nut before the rounded catch pin contacts the inside surface of the entrance of the screw nut. So the force of the human arm is not strong enough to damage the rounded catch pin and the internal screw thread in the entrance of the screw nut or to separate the screw form the screw nut, thereby preventing the loss of the screw nut.
Description
Technical field
The utility model relates to the principal mode manhole envelope car bolt that uses on a kind of Railway tank car.
Background technique
It is the principal mode manhole envelope car bolt that large-scale popularization is used on Railway tank car at present that integral type is soaked the fat bolt, is made of screw rod, nut.Screw head is a suspension ring formula structure, and nut is the hexagon full-closed structure, in cavity is arranged.On the cavity nut, also have oil hole, can effectively avoid bolt to get rusty and cause screw flight to damage because of the loading and unloading personnel knock bolt.The shortcoming that present integral type is soaked the existence of fat bolt is: the manhole bolt and nut is lost quite serious, cause Railway tank car top utilization bolt user mode bad, there is the cover bad sealing, the potential safety hazard that the flammable and combustible liquids of dress is excessive in the tank car, one-level is inflammable and explosive or poisonous and harmful chemical product escaping gas leaks has a strong impact on railway operation safety.The employing that prior art has is provided with projection in the screw rod end, can guarantee that loading and unloading personnel screw rod in loosening manhole bolt process does not temporarily separate with nut, but can't stop because of artificially stealing and cause losing in a large number of manhole bolt and nut.In addition, cavity nut length is shorter than the effective thread length on the screw rod, screw rod is screwed into the end in nut after, nut bonnet (bonnet is that the round iron plate point with 27 * 1 millimeters of Φ is welded in nut back end) is often backed down by the screw rod end and loses, rainwater, industrial chemicals enter the nut cavity easily, occur the phenomenon that manhole bolt thread rust extremely can't use after the long-term utilization.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of integral type and soaks the fat anti-theft bolt, and after in a single day bolt was assembled and finished, nut did not separate permanent with screw rod, fundamentally thoroughly solves the problem that Railway tank car manhole bolt and nut is lost in a large number.
The utility model integral type is soaked the fat anti-theft bolt, comprise nut and be screwed into the interior screw rod of nut, screw head is a suspension ring formula structure, cavity is arranged in the nut, the nut ingress is provided with internal thread, its internal diameter is less than nut cavity internal diameter, the nut the other end is an enclosed construction, have oil hole and oil hole closed screw on the cavity nut, it is characterized in that described screw rod end is provided with no threaded circular styletable, offer lateral direction penetrating formula pin hole in the cylindrical end, installation stops straight pin in the pin hole, stops that the cylindrical end side is stretched out at the two ends of straight pin respectively.
When installation stops straight pin, earlier screw rod is screwed in the cavity nut, when treating through pin hole on the cylindrical end of screw rod end and the oil hole complete matching on the nut, will stop that straight pin pushes the pin hole from oil hole, and make its two ends respectively stretch out cylindrical end side 2-3mm.Stop that straight pin installs the back and uses closed screw sealed oil-filling hole.For guaranteeing to stop that straight pin is installed in the through pin hole of screw rod end smoothly, oil hole internal thread path must be greater than stopping straight pin diameter 2-3mm.
The suitable cylindrical end of length is set in the screw rod end, before its length should guarantee to stop straight pin and nut ingress inner side surface contacts, the screw thread of screw thread on the screw rod and nut ingress disengages fully, to prevent that the lawless person is when stealing nut or loading and unloading personnel, other staff's faulty operation, utilize the tightening force that produces between nut when rotation screw rod and the nut, cause the screw rod end stop that straight pin is lost, bending deflection or cause stopping that straight pin scratches the internal thread of nut ingress.Before stopping straight pin contact nut ingress inner side surface, the internal thread of screw thread on the screw rod and nut ingress disengages fully, only depend on the strength of human arm to be not enough to damage the internal thread that stops straight pin and nut inlet, simultaneously also deficiency so that screw rod separate with nut, thereby reach the purpose that prevents that nut from losing.
After preventing that screw rod from all screwing in the cavity nut, cavity nut bonnet is backed down in its end, and screw flight effective length and screw rod end cylindrical end length sum must be less than about cavity nut length 5mm.
Advantage of the present utility model:
Simple in structure, be convenient to install, can avoid effectively that the manhole bolt gets rusty, damage and part lose.After in a single day manhole bolt of the present utility model was assembled and finished, the cavity nut did not separate permanent with screw rod, has fundamentally thoroughly solved the problem of losing in a large number of Railway tank car manhole bolt and nut during the last ten years.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Among the figure: 1 screw rod, 2 nuts, 3 nut ingress, 4 nut cavitys, 5 oil hole closed screws, 6 cylindrical ends 7 stop straight pin 8 nut bonnets
Embodiment
As Fig. 1, integral type is soaked the fat anti-theft bolt, comprises nut 2, screw rod 1, and nut 2 still is the cavity type full-closed structure, and profile is a hexagon, is processed with the internal thread of M20 (mm) in cavity nut ingress 3, is used for screwing in screw rod; The other end is an enclosed construction, and the circular steel plate that adopts Φ 27 * 2 is as nut bonnet 8 welded closure.Offer oil hole at cavity nut middle part.Oil hole has two aspect effects, is used on the one hand grease up in the nut cavity, is positioned at the screw rod end prevents that nut from losing stop straight pin 7 or stop screw from oil hole on the other hand after screw rod screws in the nut cavity.
The basic structure that screw rod 1 adopts integral type to soak fat bolt screw rod, screw head is suspension ring formula structure (a bearing pin attachment hole), screw rod 1 end is provided with no threaded circular styletable 6, offer lateral direction penetrating formula pin hole in the cylindrical end 6, installation stops straight pin 7 in the pin hole, stops that straight pin 7 and pin hole are Spielpassung.
When installation stops straight pin 7, earlier screw rod 1 is screwed in the cavity nut, when treating through pin hole on the screw rod end cylindrical end 6 and the oil hole complete matching on the nut, will stop that straight pin 7 pushes the pin hole from oil hole, and make its two ends respectively stretch out cylindrical end side 2-3mm.Stop that straight pin installs the back and uses oil hole closed screw 5 sealed oil-filling holes.For guaranteeing to stop that straight pin is installed in the through pin hole of screw rod end smoothly, oil hole internal thread path must be greater than stopping straight pin diameter 2-3mm.
Because nut 2 is hexagon and smooth surface, before stopping straight pin 7 contact nut ingress 3 inner side surfaces, the internal thread of screw thread on the screw rod and nut ingress disengages fully, only depend on the strength of human arm to be not enough to damage the internal thread that stops straight pin and nut ingress, simultaneously also deficiency so that screw rod separate with nut, thereby reach the purpose that prevents that nut from losing.
Claims (3)
1, a kind of integral type is soaked the fat anti-theft bolt, comprise nut and be screwed into the interior screw rod of nut, screw head is a suspension ring formula structure, cavity is arranged in the nut, the nut ingress is provided with internal thread, its internal diameter is less than nut cavity internal diameter, the nut the other end is an enclosed construction, have oil hole and oil hole closed screw on the cavity nut, it is characterized in that described screw rod end is provided with no threaded circular styletable, offer lateral direction penetrating formula pin hole in the cylindrical end, installation stops straight pin in the pin hole, stops that the cylindrical end side is stretched out at the two ends of straight pin respectively.
2, anti-theft bolt according to claim 1, the internal thread path that it is characterized in that described oil hole is greater than stopping straight pin diameter 2～3mm.
3, anti-theft bolt according to claim 1, before the length that it is characterized in that the cylindrical end of described screw rod end should guarantee to stop straight pin and nut ingress inner side surface contacts, the screw thread of screw thread on the screw rod and nut ingress disengaged fully.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620083895 CN2906178Y (en) | 2006-04-28 | 2006-04-28 | Integrated impregnated theftproof bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620083895 CN2906178Y (en) | 2006-04-28 | 2006-04-28 | Integrated impregnated theftproof bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2906178Y true CN2906178Y (en) | 2007-05-30 |
Family
ID=38114813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620083895 Expired - Fee Related CN2906178Y (en) | 2006-04-28 | 2006-04-28 | Integrated impregnated theftproof bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2906178Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022412A (en) * | 2010-12-02 | 2011-04-20 | 贵州航太精密制造有限公司 | Nut |
-
2006
- 2006-04-28 CN CN 200620083895 patent/CN2906178Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022412A (en) * | 2010-12-02 | 2011-04-20 | 贵州航太精密制造有限公司 | Nut |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070530 Termination date: 20100428 |