CN201057200Y - Special bolt of crane slewing support - Google Patents
Special bolt of crane slewing support Download PDFInfo
- Publication number
- CN201057200Y CN201057200Y CNU2007200396733U CN200720039673U CN201057200Y CN 201057200 Y CN201057200 Y CN 201057200Y CN U2007200396733 U CNU2007200396733 U CN U2007200396733U CN 200720039673 U CN200720039673 U CN 200720039673U CN 201057200 Y CN201057200 Y CN 201057200Y
- Authority
- CN
- China
- Prior art keywords
- bolt
- plain cushion
- cylinder
- head
- bolt head
- 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 - Lifetime
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- Bolts, Nuts, And Washers (AREA)
Abstract
The utility model relates to a special bolt of a slewing ring of a crane, which pertains to the technical field of a special bolt of a slewing ring of a crane. A cylinder-shaped plain cushion is arranged below a hexagon bolt head; a bolt shank is positioned below the cylinder-shaped plain cushion; the hexagon bolt head, the cylinder-shaped plain cushion and the bolt shank are integrated. The cylinder-shaped plain cushion is arranged below the hexagon bolt head, which are integrated; the hexagon bolt head is relatively thicker, and the cylinder-shaped plain cushion is with bigger contact area; the bolt head of the hexagon bolt and the cylinder-shaped plain cushion are organically combined to bring into the advantages of the hexagon bolt and the cylinder-shaped plain cushion into play respectively, with good pre-tightening force and fatigue resistance available. The bolt head of the special bolt and the cylinder-shaped plain cushion are organically integrated, hence a big contact area with the slewing ring, good pre-tightening force, invulnerability to pressure of the plain cushion and no relative movement between the bolt head and the plain cushion are provided. Experiments and tests show that: the utility model has good anti-loose performance; the pre-tightening force is reduced to 70 percent to 75 percent of the original bolt; stress of the bolt is reduced substantially and fatigue resistance of the bolt is greatly improved.
Description
Technical field
The utility model relates to a kind of special bolt of pivoting support, particularly a kind of crane rotation supporting special bolt.
Background technique
Pivoting support is the important coupling member on crane and chassis, and the Internal and external cycle of pivoting support all is to link to each other with revolving dial or vehicle frame supporting portion respectively by bolt, so the reliably working of connecting bolt is the assurance of rotary supporting device proper functioning.Whether pivoting support work all can not become flexible, and need add pretightening force, if pretightening force is too little can not be locking, pretightening force is too big, when pivoting support loads when working once more, can make bolt strained change big.The pretightening force of bolt depends on the area of contact and the contact surface situation of bolt head and pivoting support, usually friction factor changes comparatively difficulty, has only the increasing area of contact, it is a kind of method that bolt head adds plain washer, but because the strength grade height of pivoting support bolt, packing ring easily is crushed out of shape, and bolt head and plain cushion can produce relative movement sometimes.
A kind of bolt is arranged at present, and hex head bolt head and packing ring are connected as a single entity, and packing ring is a Rotary-table, are that 10 millimeters bolt is an example with diameter, and diagonal angle length is 17.3 millimeters, and thickness is 3.6 millimeters; The last circular diameter of round platform packing ring is 17.3 millimeters, following circular diameter is 22.3 millimeters, thickness is 5.6 millimeters, the thickness of hex head bolt head is too thin and too little, is not suitable for tightening as bolt, and the Rotary-table flange part is too thick, it is big to take up room, the height difference of pivoting support Internal and external cycle is strengthened, and the facewidth narrows down, and pretightening force and anti-fatigue ability are poor.
Summary of the invention
The purpose of this utility model is that a kind of pretightening force and the good crane rotation supporting special bolt of anti-fatigue ability will be provided.
The purpose of this utility model is achieved in that the cylindrical body plain cushion under the hex head bolt head, under the cylindrical body plain cushion bolt shank is arranged, and hex head bolt head, cylindrical body plain cushion and bolt shank are overall structure.
Beneficial effect: owing to adopt such scheme, the cylindrical body plain cushion is arranged under the hex head bolt head, hex head bolt head and cylindrical body plain cushion connect as one, the thickness of hex head bolt head is thicker, the area of contact of cylindrical body plain cushion is bigger, the bolt head and the cylindrical body plain cushion of hex head bolt is combined performance advantage separately, pretightening force and anti-fatigue ability are good, have reached the purpose of this utility model.The bolt head of this special bolt and cylindrical body flat gasket are organically in conjunction with as a whole, big with the area of contact of pivoting support, pretightening force is good, flat gasket is difficult for compressive deformation, can not produce relative movement between bolt head and the flat gasket, and experiment test proves, anti-loose ability is fine, it is original 70 ~ 75% that pretightening force is reduced to, and it is considerable to reduce the bolt stress amplitude, has significantly improved the bolt anti-fatigue ability.
Description of drawings
Fig. 1 is the structural drawing of present technology.
Fig. 2 is a structural drawing of the present utility model.
Embodiment
Embodiment 1: 1 time cylindrical body plain cushion 2 is arranged at the hex head bolt head, 2 times bolt shank 3 is arranged at the cylindrical body plain cushion, hex head bolt head, cylindrical body plain cushion and bolt shank are overall structure.With M10 be that example explanation is illustrated, diagonal angle length is 18.5 millimeters, thickness is 6.4 millimeters; The diameter of cylindrical body packing ring is 22.3 millimeters, and thickness is 2 millimeters.
Claims (1)
1. a crane rotation supporting special bolt includes hex head bolt head and bolt shank, and it is characterized in that: the cylindrical body plain cushion is arranged under the hex head bolt head, under the cylindrical body plain cushion bolt shank is arranged, hex head bolt head, cylindrical body plain cushion and bolt shank are overall structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200396733U CN201057200Y (en) | 2007-06-20 | 2007-06-20 | Special bolt of crane slewing support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200396733U CN201057200Y (en) | 2007-06-20 | 2007-06-20 | Special bolt of crane slewing support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201057200Y true CN201057200Y (en) | 2008-05-07 |
Family
ID=39426041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200396733U Expired - Lifetime CN201057200Y (en) | 2007-06-20 | 2007-06-20 | Special bolt of crane slewing support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201057200Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952757A (en) * | 2016-06-27 | 2016-09-21 | 无锡迪奥机械有限公司 | Bolt with fixed binder clip |
| JP2021502530A (en) * | 2017-11-10 | 2021-01-28 | ソフト ロボティクス， インコーポレイテッド | Fasteners with reduced bacterial retention points, sealing capacity, and component protection features |
-
2007
- 2007-06-20 CN CNU2007200396733U patent/CN201057200Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952757A (en) * | 2016-06-27 | 2016-09-21 | 无锡迪奥机械有限公司 | Bolt with fixed binder clip |
| JP2021502530A (en) * | 2017-11-10 | 2021-01-28 | ソフト ロボティクス， インコーポレイテッド | Fasteners with reduced bacterial retention points, sealing capacity, and component protection features |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080507 |
|
| CX01 | Expiry of patent term |