CN2731143Y - Inner ring free needle roller bearing for gear pump - Google Patents
Inner ring free needle roller bearing for gear pump Download PDFInfo
- Publication number
- CN2731143Y CN2731143Y CN 200420096689 CN200420096689U CN2731143Y CN 2731143 Y CN2731143 Y CN 2731143Y CN 200420096689 CN200420096689 CN 200420096689 CN 200420096689 U CN200420096689 U CN 200420096689U CN 2731143 Y CN2731143 Y CN 2731143Y
- Authority
- CN
- China
- Prior art keywords
- bearing
- needle roller
- outer ring
- drum
- gear pump
- 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
Links
- 230000013011 mating Effects 0.000 claims description 10
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Rolling Contact Bearings (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The utility model provides a needle roller bearing technical project without inner ring for gear pump, comprising the outer ring of the bearing, a needle roller and a retainer, characterized in that the outer cylindrical fitting surface of the outer ring of the bearing is a slight drum-type curved face. The crow-fly distance between the maximum point and the minimum point of the drum-type curved face is within 0.001-0.1 millimeters. The outer ring fitting surface of the bearing is a slight drum-type curved face, therefore, when the bearing is arranged, the drum-type curved face on the fitting surface of the outer ring of the bearing can be forced to become the drum-type curved face of the contacting surface of the outer ring of the bearing and the needle roller because of the close fit of the bearing and the bearing block. When a support axis is under the radial stress, the needle roller can be deformed along the drum-type surface, which increases the contacting face of the support axis and the needle roller and prolongs the service life of the bearing.
Description
Affiliated technical field:
The utility model relates to a kind of bearing, especially a kind of gear pump needle bearing of no inner ring.
Background technique:
In the prior art, known gear pump is one with the mating face of the bearing outer ring of the needle bearing of no inner ring the cylndrical surface than high-axiality, this bearing in use, if the axis runout of the back shaft of bearings the axis of bearing, bearing will be subjected to bigger radial force, needle roller will produce deflection deformation, at this moment, the surface of contact of back shaft and needle roller reduces, become a contact, spot corrosion, distortion and wearing and tearing that this will cause bearing make bearing shorten working life, and this is the existing in prior technology problem.
Summary of the invention:
The utility model is at the existing in prior technology deficiency, and a kind of gear pump needle bearing technological scheme with no inner ring is provided, it is a slight cydariform curved surface that this scheme has adopted the outer cylinder mating face of bearing outer ring, this is after the bearing assembling, the cydariform curved surface of bearing outer ring mating face becomes the cydariform curved surface of bearing outer ring and needle roller surface of contact, and when back shaft was subjected to radial force, needle roller can be along the cydariform surf deform, increase the surface of contact of back shaft and needle roller, prolonged the working life of bearing.
This programme is realized by following technical measures: mainly include bearing outer ring, needle roller and retainer, the characteristics of this programme are that the outer cylinder mating face at described bearing outer ring is a slight cydariform curved surface, crow flight distance L between the highs and lows of this cydariform curved surface is between the 0.001-0.1 millimeter.The concrete characteristics of this programme also have, and the crow flight distance L between the highs and lows of described cydariform face is preferably in 0.003 or 0.004 millimeter.
The beneficial effect of this programme can be learnt according to the narration to such scheme, because in this scheme, outer cylinder mating face at bearing outer ring is a slight cydariform curved surface, this cydariform curved surface is when bearing assembles, because the interference fit between bearing and the bearing support, force the cydariform curved surface of bearing outer ring mating face to become the cydariform curved surface of bearing outer ring and needle roller surface of contact, when back shaft is subjected to radial force, needle roller can be along the cydariform surf deform, increase the surface of contact of back shaft and needle roller, prolonged the working life of bearing.This shows that the utility model compared with prior art has substantive distinguishing features and progress, the beneficial effect of its enforcement also is conspicuous.
Description of drawings:
Fig. 1 is the sectional structure schematic representation of the utility model embodiment.
Fig. 2 is the user mode schematic representation of Fig. 1.
1 is bearing outer ring among the figure, and 2 is needle roller, and 3 is retainer, and 4 is bearing support, and 5 is back shaft.
Embodiment:
For clearly demonstrating the technical characterstic of this programme,, and, this programme is set forth in conjunction with its accompanying drawing below by an embodiment.
By accompanying drawing as can be seen, the gear pump of this programme needle bearing of no inner ring, include bearing outer ring (1), needle roller (2) and retainer (3), this programme is that the outer cylinder mating face at described bearing outer ring (1) is a slight cydariform curved surface, crow flight distance L between the highs and lows of this cydariform curved surface is between the 0.001-0.1 millimeter.Crow flight distance L between the highs and lows of described cydariform face is preferably in 0.003 or 0.004 millimeter.The bearing of this programme in use, the cydariform curved surface of bearing outer ring (1) mating face is when bearing assembles, because the interference fit between bearing and the bearing support (4), force the cydariform curved surface of bearing outer ring (1) mating face to become the cydariform curved surface of bearing outer ring (1) and needle roller (2) surface of contact, when back shaft (5) is subjected to radial force P, needle roller (2) can increase the surface of contact of back shaft (5) with needle roller (2) along the cydariform surf deform, and this can prolong the working life of bearing greatly.
Claims (2)
1. a gear pump is with the needle bearing of no inner ring, mainly include bearing outer ring, needle roller and retainer, it is characterized in that: the outer cylinder mating face at described bearing outer ring is a slight cydariform curved surface, crow flight distance L between the highs and lows of this cydariform curved surface is between the 0.001-0.1 millimeter.
2. the gear pump according to claim 1 needle bearing of no inner ring, it is characterized in that: the crow flight distance L between the highs and lows of described cydariform face is preferably in 0.003 or 0.004 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420096689 CN2731143Y (en) | 2004-10-10 | 2004-10-10 | Inner ring free needle roller bearing for gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420096689 CN2731143Y (en) | 2004-10-10 | 2004-10-10 | Inner ring free needle roller bearing for gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2731143Y true CN2731143Y (en) | 2005-10-05 |
Family
ID=35051479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420096689 Expired - Lifetime CN2731143Y (en) | 2004-10-10 | 2004-10-10 | Inner ring free needle roller bearing for gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2731143Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562577A (en) * | 2012-02-28 | 2012-07-11 | 徐州科源液压有限公司 | Extra-high pressure gear oil pump |
| US8523452B2 (en) | 2007-08-31 | 2013-09-03 | Jtekt Corporation | Bearing structure and manufacturing method thereof |
| CN114135577A (en) * | 2021-12-13 | 2022-03-04 | 中国铁建重工集团股份有限公司 | Main bearing of heading machine |
-
2004
- 2004-10-10 CN CN 200420096689 patent/CN2731143Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8523452B2 (en) | 2007-08-31 | 2013-09-03 | Jtekt Corporation | Bearing structure and manufacturing method thereof |
| CN102562577A (en) * | 2012-02-28 | 2012-07-11 | 徐州科源液压有限公司 | Extra-high pressure gear oil pump |
| CN114135577A (en) * | 2021-12-13 | 2022-03-04 | 中国铁建重工集团股份有限公司 | Main bearing of heading machine |
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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 | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20141010 Granted publication date: 20051005 |