GB2165615A - A pulley assembly - Google Patents
A pulley assembly Download PDFInfo
- Publication number
- GB2165615A GB2165615A GB08525091A GB8525091A GB2165615A GB 2165615 A GB2165615 A GB 2165615A GB 08525091 A GB08525091 A GB 08525091A GB 8525091 A GB8525091 A GB 8525091A GB 2165615 A GB2165615 A GB 2165615A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carrier body
- bearing
- pulley assembly
- pulley
- flange
- 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.)
- Granted
Links
- 238000010276 construction Methods 0.000 abstract description 8
- 239000002184 metal Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
- F16C13/006—Guiding rollers, wheels or the like, formed by or on the outer element of a single bearing or bearing unit, e.g. two adjacent bearings, whose ratio of length to diameter is generally less than one
-
- 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
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
- F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
- F16H7/1254—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means
- F16H7/1281—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially circular path
-
- 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
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
-
- 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
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/63—Gears with belts and pulleys
-
- 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
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0863—Finally actuated members, e.g. constructional details thereof
- F16H2007/0865—Pulleys
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mounting Of Bearings Or Others (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
A pulley assembly comprises a carrier body 10 and a pulley body 11 mounted on and for rotation relative to the carrier body 10 by a bearing 12. The carrier body is cup-shaped and has a radially outwardly extending flange 18 at the closed end 17. The bearing 12 has a radially inner ring 13 supported by the tubular part 16 of the carrier body 10. For an economical and simple construction a portion 19 of the tubular part 16 at the open end of the carrier body 10 overlies the axially adjacent part of the carrier body so that the bearing ring 13 is positioned axially between the flange 18 and the overlying part 19. The bearing ring 13 is also a sliding fit on the carrier body 10. <IMAGE>
Description
SPECIFICATION
A pulley assembly
This invention concerns a pulley assembly.
Patent Specification GB 2102531 discloses a pulley assembly comprising a carrier body and a pulley body mounted on and for rotation relative to the carrier body by a bearing.
The carrier body is cup-shaped and has a radially outwardly extending flange at the closed end and the bearing has a radially inner ring supported by the tubular part of the carrier body.
This known assembly further includes an axial spacing member which is also cup-shaped.
The open end of the carrier body extends into the bore of the open end of the axial spacing member so that the bearing inner ring is positioned axially between the bead-like flange of the carrier body and the free open end of the axial spacing member. When the pulley assembly is mounted, the closed end of the axial spacing member abuts a mounting surface of, for example, an engine block. A screwthreaded bolt extends through openings in the closed ends of the cup-shaped members and into the engine block. When the bolt is tightened-up, the carrier body is pushed further into the axial spacing member and the bearing ring is clamped between the flange of the carrier body and the rim of the open end of the spacing member.
Although this pulley assembly is reliable and easy to instal it has a drawback of having two cup-shaped members which means that it is relatively expensive.
The subject of the invention is an assembly which can be produced relatively cheaply and is of a simple construction.
According to the invention a portion of the tubular part at the open end of the carrier body overlies the axially adjacent part of the carrier body so that the bearing ring is positioned axially between the flange and the overlying part, and the bearing ring is a sliding fit on the carrier body.
With this construction, there is no axial spacing member so that only the cup-shaped carrier body is required. Preferably, during the construction of the assembly, the bearing ring abuts the flange of the carrier body whilst the overlying portion is formed to also abut the bearing ring. The pulley assembly is mounted by a screw-threaded bolt extending through the carrier body, the open end of the carrier body abutting a mounting surface and the head of the bolt abutting the closed end of the carrier body. As the bolt is tightened, by reason of elastic or plastic deformation of the carrier body, the bearing ring is clamped between the flange and the overlying portion.
Thus a construction of a pulley assembly is possible with low production costs yet which is able to be reliably fastened without radiai deformation of the bearing ring.
The overlying portion may be a continuous annular portion which can be formed by flanging. The rim that was the free end of the carrier body thus forms a continuous end face for abutting the bearing ring. With this construction the pulley body can be well spaced from the mounting surface.
Preferably, the overlying portion is one of a plurality of bent-over lugs spaced circumferentially from one another. In the production of the carrier body, the free end is slotted to provide lugs and bending over the lugs after the bearing has been mounted is a relatively simply operation. With this construction also, the pulley body can be well spaced from the mounting surface.
An embodiment of the invention will now be described by way of example and with reference to the accompanying drawing which is a longitudinal section through a pulley assembly secured to an engine block.
The pulley assembly shown comprises a carrier body 10 and a pulley body 11 mounted on and for rotation with respect to the carrier body by a bearing 12.
The bearing is a deep groove radial ball bearing comprising an inner racing ring 13, an outer race ring 14 and a single annular row of balls 15.
The pulley body 11 is a sheet metal two part construction which is a force fit on the outer race ring 14 of the bearing 12.
The carrier body 10 is a sheet metal cup shaped body having a generally tubular part 16 and a closed end 17. A radially outwardly extending annular bead-line flange 18 is formed at the closed end 1 7 during deep drawing of the carrier body 10 and the bearing inner ring 13, which is a sliding fit on the tubular part 16, abuts the flange 18.
The open end of the carrier body 10 comprises a plurality of portions or lugs 19 overlying the axially adjacent portion of the tubular part 16. The bent-over lugs 19 are spaced circumferentially from one another by slots 20.
The lugs 19 provide free end surfaces 21 which abut the bearing inner ring 13.
The pulley assembly is secured to an engine block 22 by a screw-threaded bolt 23 with the open end of the carrier body 10 abutting the engine block. The head of the bolt 23 abuts the outer surface of the closed end 17 of the carrier body 10, while the shank of the bolt extends through an opening in the closed end, through the bore of the carrier body and into a screw-threaded bore in the engine block 22. When the bolt 23 is tightened, by reason of a slight elastic or plastic deformation of the material of the carrier body 10, the inner ring 13 of the bearing 12 is clamped axially between the flange 18 and the end faces 21 of the lugs 19. The bolt 23 is offset from the axis of the bearing 12 so that the pulley assembly can be pivotted about the bolt in or der to adjust the tension of the pulley belt (not shown).
Claims (4)
1. A pulley assembly comprising a carrier body and a pulley body mounted on and for rotation relative to the carrier body by a bearing, the carrier body is cup-shaped and a radially outwardly extending flange at the closed end and the bearing has a radially inner ring supported by the tubular part of the carrier body, wherein a portion of the tubular part at the open end of the carrier body overlies the axially adjacent part of the carrier body so that the bearing ring is positioned axially between the flange and the overlying part, and the bearing ring is a sliding fit on the carrier body.
2. A pulley assembly as claimed in Claim 1, wherein the overlying portion is a continuous annular portion.
3. A pulley assembly as claimed in Claim 1, wherein the overlying portion is one of a plurality of bent-over lugs spaced circumferential from one another.
4. A pulley assembly substantially as herein described with reference to and as shown in the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8429898 | 1984-10-11 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8525091D0 GB8525091D0 (en) | 1985-11-13 |
| GB2165615A true GB2165615A (en) | 1986-04-16 |
| GB2165615B GB2165615B (en) | 1988-05-11 |
Family
ID=6771618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08525091A Expired GB2165615B (en) | 1984-10-11 | 1985-10-11 | A pulley assembly |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR2571796B1 (en) |
| GB (1) | GB2165615B (en) |
| IT (2) | IT1200776B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3080422A1 (en) * | 2018-04-19 | 2019-10-25 | Aktiebolaget Skf | PULLEY DEVICE FOR TILT ROLLER OR ROLLER |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1190901B (en) * | 1981-07-09 | 1988-02-24 | Skf Kugellagerfabriken Gmbh | TENSIONER ROLLER FOR BELT DRIVE |
| IT1194363B (en) * | 1982-08-14 | 1988-09-22 | Skf Kugellagerfabriken Gmbh | SUPPORTING BODY FOR TENSIONER ROLLERS |
-
1985
- 1985-10-10 IT IT22437/85A patent/IT1200776B/en active
- 1985-10-10 FR FR8515042A patent/FR2571796B1/en not_active Expired
- 1985-10-10 IT IT8523386U patent/IT8523386V0/en unknown
- 1985-10-11 GB GB08525091A patent/GB2165615B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3080422A1 (en) * | 2018-04-19 | 2019-10-25 | Aktiebolaget Skf | PULLEY DEVICE FOR TILT ROLLER OR ROLLER |
| FR3080421A1 (en) * | 2018-04-19 | 2019-10-25 | Aktiebolaget Skf | PULLEY DEVICE FOR TILT ROLLER OR ROLLER |
| US11313449B2 (en) | 2018-04-19 | 2022-04-26 | Aktiebolaget Skf | Pulley device for a tensioner roller or winding roller |
| US11614155B2 (en) | 2018-04-19 | 2023-03-28 | Aktiebolaget Skf | Pulley device for a tensioner roller or winding roller |
| US11732792B2 (en) | 2018-04-19 | 2023-08-22 | Aktiebolaget Skf | Pulley device for a tensioner roller or winding roller |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2571796B1 (en) | 1988-11-10 |
| GB8525091D0 (en) | 1985-11-13 |
| IT8523386V0 (en) | 1985-10-10 |
| FR2571796A1 (en) | 1986-04-18 |
| GB2165615B (en) | 1988-05-11 |
| IT8522437A0 (en) | 1985-10-10 |
| IT1200776B (en) | 1989-01-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |