CN114754067B - Self-centering overrunning belt pulley - Google Patents
Self-centering overrunning belt pulley Download PDFInfo
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- CN114754067B CN114754067B CN202210549257.7A CN202210549257A CN114754067B CN 114754067 B CN114754067 B CN 114754067B CN 202210549257 A CN202210549257 A CN 202210549257A CN 114754067 B CN114754067 B CN 114754067B
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- centering
- torque
- roller
- groups
- rollers
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- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
- F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
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- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
- F16C33/48—Cages for rollers or needles for multiple rows of rollers or needles
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- 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
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/32—Friction members
- F16H55/36—Pulleys
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pulleys (AREA)
Abstract
The invention relates to the technical field of belt pulleys, in particular to a self-centering overrunning belt pulley, which comprises an inner ring, an outer ring and a retainer positioned between the inner ring and the outer ring, wherein a plurality of windows are formed in the retainer along the circumferential direction of the retainer, a roller is arranged in each window, a roller group comprises a torque transmission roller and a centering torque roller, a plurality of cam grooves are formed in the outer circumferential wall of the inner ring along the circumferential direction of the inner ring, the cam groove group comprises a plurality of centering torque grooves and a torque transmission groove, the outer ring is supported on the inner ring when the centering torque roller is positioned at a large end, and the centering torque roller is used for transmitting torque when the centering torque roller is positioned at a small end; the invention realizes centering and torque transmission by using the centering torque roller in the centering torque groove, realizes torque transmission by using the torque transmission roller in the torque transmission groove, realizes self-centering of the belt pulley, has simple structure, obviously reduces the process cost, prolongs the service life and obviously improves the reliability.
Description
Technical Field
The invention relates to the technical field of belt pulleys, in particular to a self-centering overrunning belt pulley.
Background
The overrunning pulley comprises an inner ring, an outer ring and rollers, overruns are realized through the movement of the rollers in the cam grooves, and when the rollers move in the cam grooves, the rollers have the functions of combining in one direction and separating in the other direction, so that the overrunning pulley is widely used in various fields of vehicles, machines, tools and the like.
When the roller is in the overrunning state, a working gap exists between the roller and the inner ring and the outer ring, so that the overrunning belt pulley does not have a centering function, one or two bearings are generally required to be installed on one side or two sides of a mechanical shaft for installing the unidirectional overrunning belt pulley at the same time, the centering and supporting effects are achieved, and the device is complex in structure, large in size and high in cost.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to solve the problem that the overrunning belt pulley in the prior art generally needs to be additionally provided with a bearing to realize the centering function, which results in complex structure and higher cost, the self-centering overrunning belt pulley is provided.
In order to solve the technical problems, the invention adopts the following technical scheme: a self-centering overrunning belt pulley comprises an inner ring, an outer ring and a retainer positioned between the inner ring and the outer ring;
The retainer is provided with a plurality of windows along the circumferential direction of the retainer, the windows form window groups, each window is internally provided with a roller, the rollers form roller groups, each roller group comprises a torque transmission roller and a centering torque roller, at least one torque transmission roller is distributed between every two adjacent centering torque rollers, the outer circumferential wall of the inner ring is provided with a plurality of cam grooves along the circumferential direction of the inner ring, the cam grooves form cam groove groups, each cam groove group comprises a plurality of centering torque grooves and a torque transmission groove, the centering torque rollers are in one-to-one correspondence with the centering torque grooves, the centering torque rollers are located in the corresponding centering torque grooves, the torque transmission rollers are in one-to-one correspondence with the torque transmission grooves, each cam groove comprises a large end and a small end, the outer ring is supported on the inner ring when the centering torque rollers are located at the large end, the centering torque rollers are used for transmitting torque when the centering torque rollers are located at the small end, the inner ring and the outer ring are in overrun states when the torque transmission rollers are located at the large end, and are used for transmitting torque when the torque transmission rollers are located at the small end.
According to the technical scheme, the centering torque roller in the centering torque groove is utilized to realize centering and torque transmission, the torque transmission roller in the torque transmission groove is utilized to realize torque transmission, self-centering of the belt pulley is realized, the structure is simple, the process cost is obviously reduced, and the reliability is obviously improved.
Further, the window groups, the roller groups and the cam groove groups are respectively provided with two groups, and are in one-to-one correspondence, the two groups of window groups are distributed along the axial direction of the retainer, the two groups of cam groove groups are distributed along the axial direction of the inner ring, and the two groups of roller groups are arranged in the two groups of cam groove groups, so that the bearing performance of the belt pulley is improved.
Further, the maximum radial distance between the bottom of the centering torque groove and the inner peripheral wall of the outer ring is smaller than the maximum radial distance between the bottom of the torque transmission groove and the inner peripheral wall of the outer ring, and when the torque transmission rollers in the torque transmission groove are separated from the inner ring and the outer ring and are in an overrun state, the centering torque rollers in the centering torque groove continuously maintain a contact state with the outer ring and the inner ring under the condition of eliminating the radial distance, thereby playing a role in centering.
Further, an annular supporting beam is arranged between the two window groups, the two window groups are separated by the supporting beam, and the integral supporting rigidity is improved.
Further, the retainer is provided with a plurality of springs along the circumferential direction, each spring comprises a mounting part and two arc pushing parts fixed at two ends of the mounting part, the two pushing parts are respectively positioned in two opposite windows in the two groups of windows, the large end of each pushing part is used for pushing the roller to the small end, and the two pushing parts of each spring can push the two opposite rollers, so that the assembly efficiency is improved, and the mounting difficulty is reduced.
Further, one end face of the outer ring is inwards bent to form an end cover, the end face of the inner ring, far away from the end cover, is outwards bent to form a flange, and the end cover and the flange fix the retainer between the outer ring and the inner ring so as to avoid axial movement of the retainer.
The invention has the beneficial effects that: the invention realizes centering and torque transmission by using the centering torque roller in the centering torque groove, realizes torque transmission by using the torque transmission roller in the torque transmission groove, realizes self-centering of the belt pulley, has simple structure, obviously reduces the process cost, prolongs the service life and obviously improves the reliability.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is an exploded view of the present invention;
FIG. 2 is a cross-sectional view of the invention from a first perspective;
FIG. 3 is an enlarged partial view of portion A of FIG. 2;
FIG. 4 is a schematic view of the assembly of the cage with the spring;
FIG. 5 is a cross-sectional view of a second view of the present invention;
In the figure:
1. an inner ring; 101. centering torque slots; 102. a torque transmission slot; 103. a flange; 2. an outer ring; 201. an end cap; 3. a retainer; 301. a window; 302. a support beam; 4. centering torque rollers; 5. a torque transmission roller; 6. a spring; 601. a mounting part; 602. a pressing part;
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
Embodiment one:
as shown in fig. 1-5, the invention is a self-centering overrunning belt pulley, comprising an inner ring 1, an outer ring 2 and a retainer 3 positioned between the inner ring 1 and the outer ring 2;
The retainer 3 is provided with a plurality of windows 301 along the circumferential direction thereof, the windows 301 form window groups, each window 301 is internally provided with a roller, the rollers form roller groups, each roller group comprises a torque transmission roller 5 and a centering torque roller 4, at least one torque transmission roller 5 is distributed between two adjacent centering torque rollers 4, the outer circumferential wall of the inner ring 1 is provided with a plurality of cam grooves along the circumferential direction thereof, the cam grooves form cam groove groups, each cam groove group comprises a plurality of centering torque grooves 101 and a torque transmission groove 102, the centering torque rollers 4 are in one-to-one correspondence with the centering torque grooves 101, the centering torque rollers 4 are located in the corresponding centering torque grooves 101, the torque transmission rollers 5 are in one-to-one correspondence with the torque transmission grooves 102, the torque transmission rollers 5 are located in the corresponding torque transmission grooves 102, each cam groove comprises a large end and a small end, the outer ring 2 is supported on the inner ring 1 when the centering torque rollers 4 are located at the large end, the torque transmission rollers 4 are used for transmitting torque when the centering torque rollers are located at the small end, and the outer ring 2 are located at the small end, and the torque transmission rollers are located at the large end and are in a state of overrunning the inner ring 2 when the large end and are located at the small end.
The window groups, the roller groups and the cam groove groups are respectively provided with two groups, and are in one-to-one correspondence, the two groups of window groups are distributed along the axial direction of the retainer 3, the two groups of cam groove groups are distributed along the axial direction of the inner ring 1, and the two groups of roller groups are arranged in the two groups of cam groove groups, so that the bearing performance of the belt pulley is improved.
The maximum radial distance between the bottom of the centering torque groove 101 and the inner peripheral wall of the outer ring 2 is smaller than the maximum radial distance between the bottom of the torque transmission groove 102 and the inner peripheral wall of the outer ring 2, and when the torque transmission rollers 5 in the torque transmission groove 102 are separated from the inner ring 1 and the outer ring 2 and are in an overrun state, the centering torque rollers 4 in the centering torque groove 101 keep in contact with the outer ring 2 and the inner ring 1 under the condition of eliminating the radial distance, thereby playing a role in centering.
An annular supporting beam 302 is arranged between the two window groups, the supporting beam 302 separates the two window groups, and the overall supporting rigidity is improved.
The retainer 3 is provided with a plurality of springs 6 along the circumferential direction, each spring 6 comprises a mounting part 601 and two arc-shaped pushing parts 602 fixed at two ends of the mounting part 601, the two pushing parts 602 are respectively positioned in two opposite windows 301 in two groups of windows, the pushing parts 602 are positioned at the large end of the cam groove and used for pushing rollers to the small end, and the two pushing parts 602 of each spring 6 can push the two opposite rollers, so that the assembly efficiency is improved, and the mounting difficulty is reduced.
One of the end faces of the outer ring 2 is inwards bent to form an end cover 201, the end face of the inner ring 1 far away from the end cover 201 is outwards extended to form a flange 103, and the end cover 201 and the flange 103 are used for fixing the retainer 3 between the outer ring 2 and the inner ring 1 to avoid axial movement of the retainer.
Working principle:
Under the action of the pretightening force of the spring 6, the rollers in the centering torque groove 101 and the torque transmission groove 102 are in a critical contact state, and when the rotating speed of the outer ring 2 is greater than that of the inner ring 1, the centering torque roller 4 and the torque transmission roller 5 are in a meshing torque transmission state; when the rotation speed of the outer ring 2 is smaller than that of the inner ring 1, the torque transmission rollers 5 in the torque transmission grooves 102 are separated from the inner ring 1 and the outer ring 2 and are in an overrun state, and the centering torque rollers 4 of the centering torque groove 101 continuously keep in contact with the inner ring 1 and the outer ring 2 under the condition of eliminating radial clearance, so that the centering function is achieved.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (6)
1. A self-centering overrunning pulley, characterized in that: comprises an inner ring (1), an outer ring (2) and a retainer (3) positioned between the inner ring (1) and the outer ring (2);
The retainer (3) is provided with a plurality of windows (301) along the circumferential direction of the retainer, the windows (301) form window groups, each window (301) is internally provided with a roller, the rollers form a roller group, each roller group comprises a centering torque roller (4) and a torque transmission roller (5), and at least one torque transmission roller (5) is distributed between every two adjacent centering torque rollers (4);
The outer peripheral wall of the inner ring (1) is provided with a plurality of cam grooves along the circumferential direction of the inner ring, the cam grooves form a cam groove group, the cam groove group comprises a plurality of centering torque grooves (101) and torque transmission grooves (102), the centering torque rollers (4) are in one-to-one correspondence with the centering torque grooves (101), the centering torque rollers (4) are positioned in the corresponding centering torque grooves (101), the torque transmission rollers (5) are in one-to-one correspondence with the torque transmission grooves (102), the torque transmission rollers (5) are positioned in the corresponding torque transmission grooves (102), the cam grooves comprise large ends and small ends, the cam groove group is used for supporting the outer ring (2) on the inner ring (1) when the centering torque rollers (4) are positioned at the large ends to realize centering, and the centering torque rollers (4) are positioned at the small ends to transmit torque;
the cage (3) is provided with springs (6) along its circumferential direction for urging the rollers from the large end of the cam groove toward the small end.
2. The self-centering overrunning pulley of claim 1, wherein: the window groups, the roller groups and the cam groove groups are respectively provided with two groups, and are respectively in one-to-one correspondence, the two groups of window groups are distributed along the axial direction of the retainer (3), and the two groups of cam groove groups are distributed along the axial direction of the inner ring (1).
3. The self-centering overrunning pulley of claim 1, wherein: the maximum radial distance between the bottom of the centering torque groove (101) and the inner peripheral wall of the outer ring (2) is smaller than the maximum radial distance between the bottom of the torque transmission groove (102) and the inner peripheral wall of the outer ring (2).
4. The self-centering overrunning pulley of claim 1, wherein: an annular support beam (302) is arranged between the two window groups.
5. The self-centering overrunning pulley of claim 1, wherein: each spring (6) comprises a mounting part (601) and two arc-shaped pushing parts (602) fixed at two ends of the mounting part (601), the two pushing parts (602) are respectively positioned in two opposite windows (301) in two window groups, and the pushing parts (602) are positioned at the large end of the cam groove and used for pushing the roller towards the small end.
6. The self-centering overrunning pulley of claim 1, wherein: one end face of the outer ring (2) is inwards bent to form an end cover (201), and the end face, far away from the end cover (201), of the inner ring (1) is outwards bent to form a flange (103).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210549257.7A CN114754067B (en) | 2022-05-20 | 2022-05-20 | Self-centering overrunning belt pulley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210549257.7A CN114754067B (en) | 2022-05-20 | 2022-05-20 | Self-centering overrunning belt pulley |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114754067A CN114754067A (en) | 2022-07-15 |
| CN114754067B true CN114754067B (en) | 2024-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210549257.7A Active CN114754067B (en) | 2022-05-20 | 2022-05-20 | Self-centering overrunning belt pulley |
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| CN (1) | CN114754067B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888460A (en) * | 2005-07-02 | 2007-01-03 | 刘建平 | Roller type overrunning clutch containing roller support |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6871735B2 (en) * | 2001-06-26 | 2005-03-29 | Ntn Corporation | Reverse-input shutoff clutch and rotation drive device |
| JP2011047481A (en) * | 2009-08-27 | 2011-03-10 | Nsk Warner Kk | One-way clutch |
| CN102287459B (en) * | 2011-07-21 | 2013-04-03 | 西南大学 | Heavy-duty overrunning clutch |
| JP6661316B2 (en) * | 2015-09-24 | 2020-03-11 | Ｎｓｋワーナー株式会社 | One-way clutch |
| CN114001105A (en) * | 2021-11-02 | 2022-02-01 | 德威(苏州)新能源有限公司 | One-way ratchet structure |
-
2022
- 2022-05-20 CN CN202210549257.7A patent/CN114754067B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888460A (en) * | 2005-07-02 | 2007-01-03 | 刘建平 | Roller type overrunning clutch containing roller support |
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| Publication number | Publication date |
|---|---|
| CN114754067A (en) | 2022-07-15 |
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