CN102720236A - Center revolving joint for excavating machine - Google Patents
Center revolving joint for excavating machine Download PDFInfo
- Publication number
- CN102720236A CN102720236A CN2012102135273A CN201210213527A CN102720236A CN 102720236 A CN102720236 A CN 102720236A CN 2012102135273 A CN2012102135273 A CN 2012102135273A CN 201210213527 A CN201210213527 A CN 201210213527A CN 102720236 A CN102720236 A CN 102720236A
- Authority
- CN
- China
- Prior art keywords
- mandrel
- revolving joint
- lining
- bushing block
- core shaft
- 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.)
- Pending
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- Earth Drilling (AREA)
Abstract
The invention discloses a center revolving joint for an excavating machine. The center revolving joint is characterized by comprising a bushing block, wherein an outer diameter of the bushing block is connected with an inner diameter of a revolution body in an interference fit mode, and an inner diameter of the bushing block is connected with a core shaft in a clearance fit mode; a clearance between the bushing block and the core shaft is smaller than a clearance between the revolution body and the core shaft; and the bushing block is positioned between an oil port of the core shaft and an oil groove. The center revolving joint has the advantages that the abrasion of a rotation sealing ring and a dustproof ring in the using process is reduced, and the service life of a product is prolonged; and the resistance moment of the product in the using process is reduced, and the working efficiency of the product is improved.
Description
Technical field
The present invention relates to a kind ofly be mainly used in excavator, crane, land leveller, revolve the centre revolving joint on the engineering machinery such as digging commentaries on classics, particularly relates to a kind of excavator centre revolving joint.
Background technology
Have only rotating seal ring to support at present between the swivel coupling mandrel of each swivel coupling manufacturer production and the revolving body, do not have other supporting protection device, there is some deficiency below in this structure:
1, rotating seal ring and dust ring are easy to wear, and application life is short;
2, the steering resistance square is big in the product use, and operating efficiency is low.
Summary of the invention
The object of the invention just provides and a kind ofly can reduce the wearing and tearing of rotating seal ring, dust ring, improves the digger revolving center sub of product application life and operating efficiency.
Solution of the present invention is such: the present invention includes mandrel and the revolving body that is socketed in mandrel; Upper end at revolving body is connected with end cap; Main points of the present invention are to have lining; Described lining external diameter adopts interference fit to be connected with the revolving body internal diameter, and the internal diameter of lining is connected for adopting matched in clearance with mandrel.
Solution further also comprises:
The gap of described lining and mandrel is less than the gap of revolving body and mandrel.
Described lining is between mandrel hydraulic fluid port and oil groove.
Advantage of the present invention be reduced rotating seal ring and dust ring use wearing and tearing, prolong product application life; Reduce the product moment of resistance in use, improved the operating efficiency of product.
Description of drawings
Accompanying drawing is used to explain the present invention.
Accompanying drawing 1 is traditional excavator centre revolving joint structural representation.
Accompanying drawing 2 is structural representations of the present invention.
The specific embodiment
Shown in accompanying drawing 2, lining 4 external diameters of the present invention adopt interference fit to be connected with revolving body 2 internal diameters, and the internal diameter of lining 4 is connected for adopting matched in clearance with mandrel 6; Described lining 4 is between mandrel hydraulic fluid port A and oil groove B.
After revolving body 2 roughing are accomplished, the lining 4 of high-abrasive material is withheld in revolving body inside, guaranteed that both are interference fit; Then revolving body 2 and lining 4 endoporus are carried out fine finishining, guarantee the gap of the gap of lining 4 and mandrel 6, assemble parts such as rotating seal ring 3, dust ring 5, mandrel 6, end cap 1 at last less than revolving body 2 and mandrel 6.
Claims (3)
1. plant the excavator centre revolving joint; Comprise mandrel (6) and be socketed in the revolving body (2) of mandrel (6); Be connected with end cap (1) in the upper end of revolving body (2); It is characterized in that having lining (4), described lining (4) external diameter adopts interference fit to be connected with revolving body (2) internal diameter, and the internal diameter of lining (4) is connected for adopting matched in clearance with mandrel (6).
2. excavator centre revolving joint according to claim 1 is characterized in that the gap of the gap of described lining (4) and mandrel (6) less than revolving body (2) and mandrel (6).
3. excavator centre revolving joint according to claim 1 and 2 is characterized in that described lining (4) is positioned between mandrel hydraulic fluid port (A) and the oil groove (B).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102135273A CN102720236A (en) | 2012-06-27 | 2012-06-27 | Center revolving joint for excavating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102135273A CN102720236A (en) | 2012-06-27 | 2012-06-27 | Center revolving joint for excavating machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102720236A true CN102720236A (en) | 2012-10-10 |
Family
ID=46946091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102135273A Pending CN102720236A (en) | 2012-06-27 | 2012-06-27 | Center revolving joint for excavating machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102720236A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1397992A (en) * | 1971-07-30 | 1975-06-18 | France Armed Forces | Universal joint couplings with controlled movements |
| DE19621020C2 (en) * | 1996-05-24 | 2002-02-07 | Gat Gmbh | Rotary union for high pressures and high relative speeds |
| CN1839232A (en) * | 2003-12-18 | 2006-09-27 | 日立建机株式会社 | Swivel joint for construction machine |
| CN1888325A (en) * | 2005-06-29 | 2007-01-03 | 刘润郊 | Rotating connection apparatus for borehole pump pouring concrete rotary guniting enlarging footing piling |
| CN201024045Y (en) * | 2007-03-29 | 2008-02-20 | 徐州重型机械有限公司 | Accelerograph controlled separation type central swivel joint combination device |
| JP4118763B2 (en) * | 2003-08-12 | 2008-07-16 | 株式会社クボタ | Swivel work machine |
| JP4174880B2 (en) * | 1998-11-13 | 2008-11-05 | コベルコクレーン株式会社 | Swivel joint |
| CN101718380A (en) * | 2009-12-11 | 2010-06-02 | 苏州有色金属研究院有限公司 | New type rotation joint having flexible float ring sealing structure |
| CN202278031U (en) * | 2011-08-23 | 2012-06-20 | 宝钢集团新疆八一钢铁有限公司 | Improved rotary joint of unrolling machine |
| CN202280978U (en) * | 2011-10-18 | 2012-06-20 | 江阴市长龄机械制造有限公司 | Rotary joint capable of effectively maintaining pressure |
-
2012
- 2012-06-27 CN CN2012102135273A patent/CN102720236A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1397992A (en) * | 1971-07-30 | 1975-06-18 | France Armed Forces | Universal joint couplings with controlled movements |
| DE19621020C2 (en) * | 1996-05-24 | 2002-02-07 | Gat Gmbh | Rotary union for high pressures and high relative speeds |
| JP4174880B2 (en) * | 1998-11-13 | 2008-11-05 | コベルコクレーン株式会社 | Swivel joint |
| JP4118763B2 (en) * | 2003-08-12 | 2008-07-16 | 株式会社クボタ | Swivel work machine |
| CN1839232A (en) * | 2003-12-18 | 2006-09-27 | 日立建机株式会社 | Swivel joint for construction machine |
| JPWO2005061805A1 (en) * | 2003-12-18 | 2007-12-13 | 日立建機株式会社 | Construction machine swivel joint |
| CN1888325A (en) * | 2005-06-29 | 2007-01-03 | 刘润郊 | Rotating connection apparatus for borehole pump pouring concrete rotary guniting enlarging footing piling |
| CN201024045Y (en) * | 2007-03-29 | 2008-02-20 | 徐州重型机械有限公司 | Accelerograph controlled separation type central swivel joint combination device |
| CN101718380A (en) * | 2009-12-11 | 2010-06-02 | 苏州有色金属研究院有限公司 | New type rotation joint having flexible float ring sealing structure |
| CN202278031U (en) * | 2011-08-23 | 2012-06-20 | 宝钢集团新疆八一钢铁有限公司 | Improved rotary joint of unrolling machine |
| CN202280978U (en) * | 2011-10-18 | 2012-06-20 | 江阴市长龄机械制造有限公司 | Rotary joint capable of effectively maintaining pressure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121010 |