CN201262193Y - Unidirectional two-row combined needle bearing - Google Patents
Unidirectional two-row combined needle bearing Download PDFInfo
- Publication number
- CN201262193Y CN201262193Y CNU2008200415601U CN200820041560U CN201262193Y CN 201262193 Y CN201262193 Y CN 201262193Y CN U2008200415601 U CNU2008200415601 U CN U2008200415601U CN 200820041560 U CN200820041560 U CN 200820041560U CN 201262193 Y CN201262193 Y CN 201262193Y
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- CN
- China
- Prior art keywords
- bearing
- wall
- needle
- outer ring
- eccentric
- 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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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
- F16D41/064—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
- F16D41/066—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical
- F16D41/067—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical and the members being distributed by a separate cage encircling the axis of rotation
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The utility model relates to a one-way two-row combined needle bearing for one-way power transmission, which is mainly used on the belt pulley of an automotive power generator. The technical scheme is as follows: the one-way two-row combined needle bearing comprises a bearing outer ring, an internal toothed ring, a ball track formed between the inner wall of the bearing outer ring and the outer wall of a joint sleeve, and retainers arranged inside the ball track. The ball track comprises a plurality of units. A rolling needle fixed on the retainer and a snap spring for resetting the rolling needle are arranged in each unit. The one-way two-row combined needle bearing is characterized in that in the units, the inner wall of each bearing outer ring at least comprises two eccentric arc-shaped sections with the same eccentric direction, and one rolling needle is arranged inside the ball track relative to each eccentric arc-shaped section; the distance between one end of each eccentric arc-shaped section and the outer wall of the internal toothed ring is larger than the diameter (2r) of the rolling needle, and the distance between the other end of each eccentric arc-shaped section and the outer wall of the internal toothed ring is less than the diameter (2r) of the rolling needle; and the two adjacent eccentric arc-shaped sections define a step. The one-way two-row combined needle bearing can increase the transmission of torque and is adaptive to batch production.
Description
Technical field
The utility model relates to the unidirectional biserial combination needle bearing of a class unidirectional delivery power, is mainly used on the belt pulley of automobile current generator.
Background technique
At present, the application of one-way belt sheave has been arranged, but its working life is generally at 10000 hours abroad.This belt pulley has the function of unidirectional delivery moment, and its internal structure is equivalent to an overrunning clutch.Because the center of described one-way belt sheave also has a cover that is connected with generator rotor shaft, and the external diameter of belt pulley is less, the narrow space of inner chamber, as when adopting the overrunning clutch of routine, the diameter of roller is very little, generally exists
About, therefore, the torque force of output can not meet design requirement.The machining accuracy height of this one-way belt sheave assembles difficulty in addition, is unfavorable for producing in enormous quantities.
Summary of the invention
For overcoming above-mentioned unfavorable factor, the utility model provides a kind of unidirectional biserial combination needle bearing, to improve carry-over moment, the convenient batch process in batches.
According to the technological scheme that the utility model provides, described unidirectional biserial combination needle bearing comprises bearing outer ring and ring gear, and is formed at the raceway between the outer wall of the inwall of bearing outer ring and connecting sleeve, and retainer is arranged in raceway; Described raceway comprises several unit, in each unit, have respectively and be positioned the needle roller on the retainer and be used to reed that needle roller is resetted, it is characterized in that: in described unit, the inwall of bearing outer ring comprises two sections eccentric arcs that eccentric direction is identical at least, and a needle roller is set in the raceway corresponding to each section eccentric arc; Spacing between one end of described eccentric arc and the outer wall of described ring gear is greater than the diameter 2r of needle roller, and the spacing between the other end of described eccentric arc and the outer wall of described ring gear is less than the diameter 2r of needle roller; Between adjacent two sections eccentric arcs, form step.
The beneficial effects of the utility model are: make a kind of unidirectional drive mechanism of complexity, be integrated into one group of independently series product, make complicated originally simplified processing, can be used in widely in the mechanism that needs unidirectional transmission.
Description of drawings
Fig. 1 is a drawing in side sectional elevation tectonic maps of the present utility model.
Fig. 2 is the longitudinal section tectonic maps.
Fig. 3 is the I enlarged view of Fig. 1.
Among the figure: 1, bearing outer ring, 2, retainer, 3, needle roller, 4, reed, 5, connecting sleeve, 6, raceway, 7, eccentric arc, 8, step; D is the external diameter of bearing, and L is the width of bearing, and r is the radius of needle roller, and R1 is the internal diameter of raceway, and R2 is the radius of eccentric arc.
Embodiment
As shown in the figure: described unidirectional biserial combination needle bearing comprises bearing outer ring 1 and connecting sleeve 5, and is formed at the raceway 6 between the outer wall of the inwall of bearing outer ring 1 and connecting sleeve 5, and retainer 2 is arranged in raceway 6; Described raceway 6 comprises several unit, the needle roller 3 that is positioned on the retainer 2 is arranged respectively in each unit and be used to reed 4 that needle roller 3 is resetted, in described unit, the inwall of bearing outer ring 1 comprises two sections eccentric arcs 7 that eccentric direction is identical at least, and a needle roller 3 is set in the raceway corresponding to each section eccentric arc 7; Spacing between one end of described eccentric arc 7 and the outer wall of described connecting sleeve 5 is greater than the diameter 2r of needle roller 3, and the spacing between the outer wall of the other end of described eccentric arc 7 and described connecting sleeve 5 is less than the diameter 2r of needle roller 3; At 7 formation steps 8 of adjacent two sections eccentric arcs.
When impulse bearing outer ring 1, the chamber increases by one group of eccentric arc 7 within it, and when bearing outer ring 1 driven rotary, needle roller 3 enters engagement, plays the effect of transferring power.When the rotating speed of the reduction of bearing outer ring 1 rotating speed, 5 connecting sleeves was higher than the rotating speed of bearing outer ring 1, needle roller 3 withdrawed from engagement automatically, at this moment only plays the effect of rolling bearing, made bearing outer ring 1 and connecting sleeve 5 form a speed discrepancy.Reliable in order to guarantee engagement, stainless steel reed 4 is housed on retainer 2, needle roller 3 is pushed in the working pressure angle.For strengthening carry-over moment, adopt the form of biserial combination needle roller 3, make bearing structure more compact.
Bearing outer ring 1 can adopt thin plate cold-extruded drawing and forming, and its cavity shape is the eccentric arc 7 of one group of five equilibrium, and adopting the advantage of eccentric arc 7 is under the less situation of throw of eccentric, and its angle of wedge error rate is less, can be controlled at below 2.3%.
In Fig. 1, needle roller 3 adopts two needle rollers to be listed in the die cavity of retainer 2, and purpose is in order to improve the ability of carry-over moment, to guarantee the working life of bearing, and can make structure more compact.
Among Fig. 2, retainer 2 and bearing outer ring 1 relative fixed have one group of flange at its place, outer ring, embed in the interior die cavity of bearing outer ring 1 during installation, and its effect is to make needle roller 3 can remain on the working position of bearing outer ring 1.
Among Fig. 3, stainless steel reed 4 is embedded on the retainer 2, gives 3 one thrusts of needle roller all the time, can guarantee bearing effective engagement at work.
Claims (1)
1, a kind of unidirectional biserial combination needle bearing comprises bearing outer ring (1) and connecting sleeve (5), and is formed at the raceway (6) between the outer wall of the inwall of bearing outer ring (1) and connecting sleeve (5), and retainer (2) is arranged in raceway (6); Described raceway (6) comprises several unit, the needle roller (3) that is positioned on the retainer (2) is arranged respectively in each unit and be used to reed (4) that needle roller (3) is resetted, it is characterized in that: in described unit, the inwall of bearing outer ring (1) comprises two sections eccentric arcs (7) that eccentric direction is identical at least, and a needle roller (3) is set in the raceway corresponding to each section eccentric arc (7); Spacing between the outer wall of one end of described eccentric arc (7) and described connecting sleeve (5) is greater than the diameter 2r of needle roller (3), and the spacing between the outer wall of the other end of described eccentric arc (7) and described connecting sleeve (5) is less than the diameter 2r of needle roller (3); Between adjacent two sections eccentric arcs (7), form step (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200415601U CN201262193Y (en) | 2008-08-05 | 2008-08-05 | Unidirectional two-row combined needle bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200415601U CN201262193Y (en) | 2008-08-05 | 2008-08-05 | Unidirectional two-row combined needle bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201262193Y true CN201262193Y (en) | 2009-06-24 |
Family
ID=40808666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200415601U Expired - Fee Related CN201262193Y (en) | 2008-08-05 | 2008-08-05 | Unidirectional two-row combined needle bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201262193Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322083A (en) * | 2013-07-02 | 2013-09-25 | 广西柳工机械股份有限公司 | Overrunning clutch roller limiting device |
| CN106015389A (en) * | 2016-07-13 | 2016-10-12 | 无锡市第二轴承有限公司 | One-way clutch bearing |
| CN114593145A (en) * | 2020-12-04 | 2022-06-07 | 舍弗勒技术股份两合公司 | Harmonic drive and bearing element for a harmonic drive |
-
2008
- 2008-08-05 CN CNU2008200415601U patent/CN201262193Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322083A (en) * | 2013-07-02 | 2013-09-25 | 广西柳工机械股份有限公司 | Overrunning clutch roller limiting device |
| CN106015389A (en) * | 2016-07-13 | 2016-10-12 | 无锡市第二轴承有限公司 | One-way clutch bearing |
| CN114593145A (en) * | 2020-12-04 | 2022-06-07 | 舍弗勒技术股份两合公司 | Harmonic drive and bearing element for a harmonic drive |
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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: 20090624 Termination date: 20130805 |