CN201401442Y - Unidirectional needle bearing for unidirectional belt wheel - Google Patents
Unidirectional needle bearing for unidirectional belt wheel Download PDFInfo
- Publication number
- CN201401442Y CN201401442Y CN2009200360529U CN200920036052U CN201401442Y CN 201401442 Y CN201401442 Y CN 201401442Y CN 2009200360529 U CN2009200360529 U CN 2009200360529U CN 200920036052 U CN200920036052 U CN 200920036052U CN 201401442 Y CN201401442 Y CN 201401442Y
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- CN
- China
- Prior art keywords
- unidirectional
- bearing
- needle bearing
- outer ring
- connecting sleeve
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model relates to a unidirectional needle bearing for a unidirectional belt wheel, which currently is mainly on a belt wheel of an automobile engine. According to the technical scheme of the utility model, the unidirectional needle bearing comprises a bearing outer ring, a connecting sleeve and a rollaway nest formed between the inner wall of the bearing out ring and the outer wall of the connecting sleeve. A cage is arranged in the rollaway nest which comprises a plurality of units, and a quill roller positioned on the cage and a leaf spring used for enabling the quill roller to restore are arranged in each unit. The unidirectional needle bearing is characterized in that in the units, the inner wall of the bearing outer ring comprises at least one segment of eccentric arc, anda step is formed between two adjacent eccentric arcs. The unidirectional needle bearing can replace a unidirectional clutch mechanism inside the belt wheel and can be turned to be a group of independent series products. The unidirectional needle bearing is convenient for specialized production and batch production, and the length and the number of the quill rollers are increased in a limited roomso as to improve the transmission torque.
Description
Technical field
The utility model relates to the needle bearing of a class unidirectional delivery power, is mainly used at present on the one-way belt sheave of automobile current generator.
Background technique
Traditional one-way belt sheave is in order to realize the function of its unidirectional delivery moment, and its inside is provided with overrunning clutch usually.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, contact length is short, and quantity is few.Therefore, the torque force of output can not meet design requirement, and working life is shorter.This in addition one-way belt sheave adds the location difficulty in man-hour, and machining accuracy is difficult to improve, and the assembling difficulty is unfavorable for producing in enormous quantities.Therefore need a kind of new unidirectional needle bearing that can substitute overrunning clutch badly.
Summary of the invention
For overcoming above-mentioned unfavorable factor, the utility model provides a kind of unidirectional needle bearing that is used for one-way belt sheave, can substitute the overrunning clutch of belt pulley inside, make it become one group of independence series product, be convenient to specialized production and batch process, and increased needle roller length and quantity in limited space, to improve carry-over moment.
The technological scheme that provides according to the utility model, the described unidirectional needle bearing that is used for one-way belt sheave comprises bearing outer ring and connecting sleeve, and be formed at raceway between the outer wall of the inwall of bearing outer ring and connecting sleeve, 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 the described unit, the inwall of bearing outer ring comprises two sections eccentric arcs at least, forms step between adjacent two sections eccentric arcs.
The inwall of the bearing outer ring in the described unit comprises two sections eccentric arcs, is provided with a needle roller in the raceway corresponding to each section eccentric arc.
Spacing between one end of described eccentric arc and the outer wall of described connecting sleeve is greater than the diameter of needle roller, and the spacing between the other end of described eccentric arc and the outer wall of described connecting sleeve is less than the diameter of needle roller.
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, specialization can be used in the mechanism that needs unidirectional transmission widely.
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: the described unidirectional needle bearing that is used for one-way belt sheave 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 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.In order to improve the ability of carry-over moment, guarantee the working life of bearing, and can make structure more compact, also can adopt multistage eccentric arc 7.
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, can adopt the form of multiple row 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 can adopt many 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.(seeing accompanying drawing 2)
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 (3)
1, a kind of unidirectional needle bearing that is used for one-way belt sheave, comprise bearing outer ring (1) and connecting sleeve (5), and be formed at raceway (6) between the outer wall of the inwall of bearing outer ring (1) and connecting sleeve (5), 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 the described unit, the inwall of bearing outer ring (1) comprises two sections eccentric arcs (7) at least, forms step (8) between adjacent two sections eccentric arcs (7).
2, according to the described unidirectional needle bearing that is used for one-way belt sheave of claim 1, it is characterized in that: the inwall of the bearing outer ring in the described unit (1) comprises two sections eccentric arcs (7), is provided with a needle roller (3) in the raceway corresponding to each section eccentric arc (7).
3, according to the described unidirectional needle bearing that is used for one-way belt sheave of claim 1, it is characterized in that: the spacing between the outer wall of an end of described eccentric arc (7) and described connecting sleeve (5) is greater than the diameter 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 of needle roller (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200360529U CN201401442Y (en) | 2009-03-09 | 2009-03-09 | Unidirectional needle bearing for unidirectional belt wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200360529U CN201401442Y (en) | 2009-03-09 | 2009-03-09 | Unidirectional needle bearing for unidirectional belt wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201401442Y true CN201401442Y (en) | 2010-02-10 |
Family
ID=41661240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200360529U Expired - Fee Related CN201401442Y (en) | 2009-03-09 | 2009-03-09 | Unidirectional needle bearing for unidirectional belt wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201401442Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015144005A1 (en) * | 2014-03-24 | 2015-10-01 | Shanghai Changyi Machinery Manufacture Co., Ltd | A one-way bearing |
| CN106151259A (en) * | 2016-08-17 | 2016-11-23 | 常州市武进长江滚针轴承有限公司 | Spring type needle bearing |
-
2009
- 2009-03-09 CN CN2009200360529U patent/CN201401442Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015144005A1 (en) * | 2014-03-24 | 2015-10-01 | Shanghai Changyi Machinery Manufacture Co., Ltd | A one-way bearing |
| US10415657B2 (en) | 2014-03-24 | 2019-09-17 | Shanghai Changyi Machinery Manufacture Co., Ltd | One-way bearing |
| CN106151259A (en) * | 2016-08-17 | 2016-11-23 | 常州市武进长江滚针轴承有限公司 | Spring type needle bearing |
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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 |
Granted publication date: 20100210 Termination date: 20140309 |