CN201090609Y - Needle bearing retainer - Google Patents
Needle bearing retainer Download PDFInfo
- Publication number
- CN201090609Y CN201090609Y CNU2007200465697U CN200720046569U CN201090609Y CN 201090609 Y CN201090609 Y CN 201090609Y CN U2007200465697 U CNU2007200465697 U CN U2007200465697U CN 200720046569 U CN200720046569 U CN 200720046569U CN 201090609 Y CN201090609 Y CN 201090609Y
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- CN
- China
- Prior art keywords
- needle
- needle roller
- evagination
- external
- window
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model discloses a case for a needle roller bearing, comprising needle roller windows which are evenly distributed on a circular case; each long edge of each needle roller window is provided with at least two external protruding locking notches which face the center of the needle roller window; the distance between two external protruding locking notches is wide enough to hold two needle rollers side by side; the external circumference of each external protruding locking slants towards the center of the needle roller window to form an inclined plane; the included angle between the internal circumference and the external circumference is an acute angle and the angle between the two external circumferential inclined planes of two opposite locking notches is 20 to 150 degrees. In such a structure, the contact area between the external protruding locking notches is reduced; the needle rollers can slightly move outward from the needle roller windows during work, thus increasing the clearance between two needle rollers, which is good for the rotation of the two needle rollers in the needle roller windows; the two needle rollers arranged side by side inside the window will not drop off, meeting the requirements of the needle roller with heavy work load and small radial size.
Description
Technical field
The utility model relates to a kind of retainer, relates in particular to the fenestra that retainer holds needle roller, belongs to technical field of bearings.
Background technique
Needle bearing is widely used in various machinery to bear advantages such as load is big, radial dimension is less, in hydraulicdriven all kinds of oil hydraulic pumps such as gear pump, vane pump, plunger pump, often uses various needle bearings.The working load that gear bore as gear pump is very big, the load that needle bearing bore of support teeth wheel shaft is also very big simultaneously, in order to satisfy the gear pump requirement that radially fitted position is less, working load is very big, existing gear pump uses the full needle bearing of no bearing inner race, no retainer usually, but when this bearing of assembling, needle roller drops easily.The needle bearing of existing band retainer holds single needle roller only in the retainer fenestra, though needle roller is difficult for dropping during assembling, because of the needle roller negligible amounts, do not reach the working load requirement of gear pump.Existing another kind of retainer fenestra can hold the needle bearing of two needle rollers, two long relatively limit keeping parallelisms of this retainer fenestra, the side direction area of the fore shaft that contacts with the needle roller axial surface is bigger, and the contact resistance of needle roller is bigger during work, and two needle rollers press from both sides dead easily in fenestra.
The model utility content
In order to overcome existing oil hydraulic pump if use plain bearing, its radial load does not satisfy the working load requirement of oil hydraulic pump; If use full needle bearing, the defective that needle roller drops easily during assembling; The utility model provides a kind of needle bearing, and the retainer of this needle bearing is equipped with two needle rollers in a fenestra, neither can drop during these two needle roller assemblings, guarantees that simultaneously needle roller rotates in bearing race flexibly, also can not press from both sides dead during work in fenestra.
The purpose of this utility model is achieved by the following technical programs.
A kind of needle bearing cage, be included at least 6 uniform on annular retainer needle roller fenestras, two long limits of described needle roller fenestra are provided with at least 2 evagination fore shafts towards needle roller fenestra center, distance between the evagination fore shaft facing each other is held two needle rollers side by side, the outer circumferential face of described evagination fore shaft is formed slopely the inclined-plane towards the needle roller window center, and the angle of inner and outer circumferential surfaces is an acute angle.
The purpose of this utility model can also further realize by following technical measures.
Aforesaid needle bearing cage, the height h on wherein said each evagination fore shaft periphery inclined-plane and the ratio of retainer thickness H are 1/2～2/3.
Aforesaid needle bearing cage, the angle between the periphery inclined-plane of wherein said relative evagination fore shaft in twos is 20 °～150 °.
Every long limit of needle roller fenestra of the present utility model is provided with at least 2 evagination fore shafts towards needle roller fenestra center, this evagination fore shaft contacts for local with the axial sides of needle roller, rather than the full contact of existing needle bearing, in addition, the angle of evagination fore shaft inner and outer circumferential surfaces is an acute angle.Owing to adopted above-mentioned two kinds of measures, thereby reduced the area of contact of evagination fore shaft and needle roller greatly, help the rotation of needle roller in the needle roller fenestra, improved the assembling condition of bearing, improved an assembly quality of bearing.And be the structure of 20 °～150 ° angle between the periphery inclined-plane of evagination fore shaft facing each other, needle roller can be moved outside slightly from the evagination fore shaft in when work, be more conducive to the rotation of two needle rollers in the needle roller fenestra, because the position-limiting action of two relative evagination fore shafts, two needle rollers that hold side by side in the fenestra can not drop.
Advantage of the present utility model and characteristics will illustrate by the non-limitative illustration of following preferred embodiment and explain that these embodiments only provide as an example with reference to accompanying drawing.
Description of drawings
Fig. 1 is an axial diagrammatic cross-sectional view of the present utility model.
Fig. 2 is a radial cross-section of the present utility model.
Fig. 3 is the P portion enlarged view of Fig. 2.
Fig. 4 is the axial half sectional view that needle bearing of the present utility model is housed.
Fig. 5 is the A-A partial sectional view of Fig. 4.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
As shown in Figure 1 and Figure 2, uniform 10 needle roller fenestras 11 on the annular retainer 1 of present embodiment, two long limits 14 of this needle roller fenestra 11, last evagination fore shaft 12,13 and 12a, the 13a that respectively is provided with 2 to fenestra 11 internal direction of 14a, the distance between this evagination fore shaft 12,13 and evagination fore shaft 12a, the 13a can be held two needle rollers 2 side by side.In the cross section of needle roller window 11, the outer circumferential face of described evagination fore shaft 12,13,12a and 13a is that the angle of inner and outer circumferential surfaces is an acute angle towards the centroclinal inclined-plane of needle roller window 11.Owing to completely contact the small part that changes into fore shaft 12,13 and 12a, 13a and contact from existing between the axial sides of needle roller 2 and needle roller window 11 edges, thereby significantly reduced contact pressure each other, help the rotation of needle roller 2.
As shown in Figure 3, evagination fore shaft 12,13, the height h on each fore shaft periphery inclined-plane of 12a, 13a and the ratio of retainer thickness H are 1/2～2/3.The ratio of present embodiment is 0.64, and such structure has also reduced the axial sides and needle roller window 11 area of contact of needle roller 2, prevents that two needle rollers 2 are stuck.Since between the two relative evagination fore shafts 12,12a or the periphery inclined-plane angle between the two relative evagination fore shafts 13,13a be 20 °～150 °, such structure makes can be by the both sides of needle roller window 11 when assembling, two needle rollers 2 are put into needle roller 2 in the needle roller window 11 by the fore shaft of needle roller window 11 from inside to outside, and can not make that the bearing rotation is dumb or stuck owing to the influence that is subjected to retainer thickness of slab H.
As Fig. 4, shown in Figure 5, in each needle roller window 11 of retainer assembly of the present utility model is housed, two needle rollers 2 of packing into side by side, during work, retainer 1 carries needle roller 2 and rotates around the needle bearing center, owing between the raceway of bearing outer ring 3 and the needle roller 2 small radial clearance is arranged, under action of centrifugal force, two needle rollers 2 move outside slightly from needle roller window 11, because evagination fore shaft 12,12a and 13, between the two relative periphery inclined-planes of 13a 20 °～150 ° angle is arranged, make the circular gap between two needle rollers 2 strengthen, two needle rollers 2 can rotate and can be not stuck freely.
In addition to the implementation, the utility model can also have other mode of executions, and all employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.
Claims (3)
1. needle bearing cage, be included in annular retainer (1) and go up uniform at least 6 needle roller fenestras (11), it is characterized in that, two long limits (14 of described needle roller fenestra (11), 14a) be provided with at least 2 evagination fore shafts (12 towards needle roller fenestra (11) center, 13), (12a, 13a), evagination fore shaft (12 facing each other, 12a), (13, distance 13a) is held two needle rollers (2) side by side, described evagination fore shaft (12,13,12a, outer circumferential face 13a) is towards the centroclinal formation of needle roller window (11) inclined-plane, and the angle of inner and outer circumferential surfaces is an acute angle.
2. needle bearing cage according to claim 1 is characterized in that, described each evagination fore shaft (12,13,12a, 13a) height h on periphery inclined-plane and the ratio of retainer thickness H are 1/2～2/3.
3. needle bearing cage according to claim 2 is characterized in that, between described evagination fore shaft facing each other (12), (12a), or the periphery inclined-plane angle between the evagination fore shaft facing each other (13), (13a) is 20 °～150 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200465697U CN201090609Y (en) | 2007-10-18 | 2007-10-18 | Needle bearing retainer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200465697U CN201090609Y (en) | 2007-10-18 | 2007-10-18 | Needle bearing retainer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201090609Y true CN201090609Y (en) | 2008-07-23 |
Family
ID=39862370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200465697U Expired - Fee Related CN201090609Y (en) | 2007-10-18 | 2007-10-18 | Needle bearing retainer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201090609Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742539A (en) * | 2013-12-27 | 2014-04-23 | 瓦房店轴承集团有限责任公司 | Needle bearing for punching cage |
-
2007
- 2007-10-18 CN CNU2007200465697U patent/CN201090609Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742539A (en) * | 2013-12-27 | 2014-04-23 | 瓦房店轴承集团有限责任公司 | Needle bearing for punching cage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080723 Termination date: 20161018 |