GB2103332A - A combination of a support body and an annular pulley body - Google Patents

A combination of a support body and an annular pulley body Download PDF

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Publication number
GB2103332A
GB2103332A GB08219387A GB8219387A GB2103332A GB 2103332 A GB2103332 A GB 2103332A GB 08219387 A GB08219387 A GB 08219387A GB 8219387 A GB8219387 A GB 8219387A GB 2103332 A GB2103332 A GB 2103332A
Authority
GB
United Kingdom
Prior art keywords
support body
sleeve
combination
aperture
annular
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
Application number
GB08219387A
Other versions
GB2103332B (en
Inventor
Manfred Brandenstein
Roland Haas
Hans Rudiger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SKF GmbH
Original Assignee
SKF Kugellagerfabriken GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SKF Kugellagerfabriken GmbH filed Critical SKF Kugellagerfabriken GmbH
Publication of GB2103332A publication Critical patent/GB2103332A/en
Application granted granted Critical
Publication of GB2103332B publication Critical patent/GB2103332B/en
Expired legal-status Critical Current

Links

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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/18—Means for guiding or supporting belts, ropes, or chains
    • F16H7/20—Mountings for rollers or 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
    • 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
    • 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
    • F16C33/58—Raceways; Race rings
    • F16C33/581—Raceways; Race rings integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels
    • 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
    • F16C33/58—Raceways; Race rings
    • F16C33/588—Races of sheet metal
    • 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)
  • Rolls And Other Rotary Bodies (AREA)
  • Pulleys (AREA)

Abstract

There is disclosed an annular pulley body (11) mounted on and for rotation relative to a support body (10). The support body (10) comprises at least one sleeve (13) having a co-axial bore and means (14) defining an eccentric aperture (15) at one end of the support body (10) for reception of a bolt or screw to secure the support body (10) to a structure. To strengthen and stiffen that end of the support body (10) having the aperture (15), the support body has a radially outwardly extending annular flange (25) which resists deformation of the support body under compressive loads. <IMAGE>

Description

SPECIFICATION A combination of a support body and an annular pulley body This invention concerns a combination of a support body and an annular pulley.
Germany Utility Model 73 28 570 discloses a support body for use in such a combination, with an annular pulley body mounted on and for rotation relative to the support body by a rolling bearing. In one example, the support bodyis formed as a sleeve, by a drawing or extrusion process, having a coaxial bore with an eccentric aperture at one end for reception of an element for securing the sleeve to a structure. To keep the support body as light as possible, the walls of the sleeve are made thin. If, in this known example, the walls of the sleeve are made thin, the possibility exists that when the sleeve is secured to a structure by the element, the sleeve is put under too great a compression and is deformed.
In the known example an inner raceway is formed in the outer surface of the sleeve, and thus this raceway may also be deformed. Consequently the running accuracy and, in the extreme case, the satisfactory performance of the annular pulley body on the support body are impaired.
The subject of this invention is a combination of a support body and an annular pulley body in which the support body is less likely to be deformed under a compressive force when secured by an element to a structure.
The invention provides, in combination, a support body and an annular pulley body mounted on and for rotation relative to the support body, the support body comprising at least one sleeve having a co-axial bore and means defining an aperture at one end of the support body for reception of an element for securing the support body to a structure, the axis of which aperture is parallel to but spaced from the axis of the bore of the sleeve, wherein the support body has at the said one end a radially outwardly extending annular flange.
The flange stiffens the support body at that one end. When an element, such as a bolt or screw extends through the aperture, the bolt- or screwhead engages the outer surface ofthe means defining the aperture, and the flange provides a larger abutment surface for the bolt head.
The support body may have a radially outwardly extending annular flange at the other end. With such a construction, the support body is stiffened at both ends and forces can be transmitted between the support body and the structure without the risk that the support body will be deformed.
The support body may comprise two substantially identical sleeves arranged end to end. In such a construction, each sleeve has an annular flange and means defining an aperture at its end further from the other sleeve for reception of an element such as a bolt or screw. This allows the tool cost, the cost of the manufacturing process, and the cost of stockkeeping to be kept low and the stock-keeping to be simplified.
The flange may be an annular bead and the means defining an aperture may comprise a radially inwardly extending integral projection.
The means defining an aperture may, alternatively, be a wall made separately from the sleeve and fixed to the sleeve.
The annular pulley body is preferably mounted on and for rotation relative to the support body by means of a rolling bearing. The inner raceway or raceways can be formed directly in the outer surface of the support body or can be provided by an inner race ring fixed to the support body.
Two embodiments of the invention will now be described by way of example, reference being made to the accompanying drawings, of which: Figure lisa longitudinal section through one embodiment of a combination of a support body and an annular pulley body, the support body comprising a single sleeve, and Figure 2 is part of a longitudinal section through the other embodiment of a support body comprising two sleeves arranged end to end.
Figure 1 shows a support body 10 and an annular pulley body 11 mounted on and for rotation relative to the support body by a rolling bearing 12.
The support body 10 comprises a single sleeve 13 having a co-axial bore, one end of which is open and a radially inwardly extending integral projection 14 at the other end defines an aperture 15 for reception of an element for securing the support body 10 to a structure. The axis 16 of the bore of the sleeve 13 is parallel to but spaced from the axis 17 of the aperture 15. The sleeve 13 can thus be turned about axis 17 to adjust the tension of a pulley belt running over the annular pulley body 11. To facilitate the turning of the sleeve 13, the integral projection 14 also defines a further aperture 18 for engagement by a tool, such as a spanner, for turning the sleeve.
The rolling bearing 12 is a singlernwdeep-grnove ball bearing, comprising an inner raceway 19 formed directly on the outer surface of the sleeve 13, an outer race ring 20 providing an outer raceway 21, and a single row of balls 22.
The annular pulley body 11 comprises two parts 23 and 24 of sheet metal pressed onto the outer race ring 20 and secured together by, for example, welding.
The sleeve 13 may be formed by pressing. The element to extend through the aperture 15 to secure the support body 10 to a structure may be a bolt or screw, the head of which will engage the integral projection 14 defining the aperture 15. To reinforce the sleeve 13 against compressive loads to stiffen the sleeve 13 at that end having the aperture 15 and also to provide a larger abutment surface for the bolt- or screw-head, the sleeve is provided with an annular radially outwardly extending flange 25 in the form of a bead. The bead 25 is a folded part of the sleeve 13 between the cylindrical part of the sleeve and the radially inwardly extending integral projection 14.
Figure 2 shows a support body 26 for a combination according to the invention, which body comprises two substantially identical sleeves 27 and 28 arranged end to end and each having a co-axial bore arranged on a common axis. The end of each sleeve 27,28 further from the other sleeve has a radially inwardly extending integral projection 29,30 respectively defining an aperture 31,32 respectively. The apertures 32 and 32 are arranged on a common axis parallel to but spaced from the common axis of the sleeves 27 and 28 and define an eccentric bore of the support body 26. The integral projection 30 of the sleeve 28 also defines a further aperture 33 for engagement by a tool, such as a spanner, for turning the support body 26 about the axis of the eccentric bore.
An inner raceway 34 for balls 35 of a rolling bearing is formed on the outer surface of the support body 26 by, for example, chamfering the outer edges of the adjacent open ends of the two sleeves 27 and 28.
The two sleeves 27 and 28 can be held together by an element, such as a bolt or screw, extending through the eccentric bore and securing the support body 26 to a structure. However, the two sleeves 27 and 28 can be connected by welding or gluing.
To strengthen and stiffen each sleeve 27 and 28 to enable a large force to be transmitted between the support body 26 and the structure, to provide a larger abutment face for the head of the bolt or the screw and to resist deformation of the support body under compression, the end of each sleeve further from the other sleeve is provided with a radially outwardly extending annular flange 36,37 in the form of an annular bead. The bead 36,37 is a folded part of the sleeve 27,28 between the cylindrical portion and the radially inwardly extending integral projection 29, 30.

Claims (5)

1. In combination, a support body and an annular pulley body mounted on and for rotation relative to the support body, the support body comprising at least one sleeve having a co-axial bore and means defining an aperture at one end of the support body for reception of an element for securing the support body to a structure, the axis of which aperture is parallel to but spaced from the axis of the bore of the sleeve, wherein the support body has at the said one end a radially outwardly extending annular flange.
2. A combination as claimed in claim 1, wherein the support body has a radially outwardly extending annular flange at the other end.
3. A combination as claimed in claim 2, wherein the support body comprises two substantially identical sleeves arranged end to end.
4. A combination as claimed in claim 1,2 or 3, wherein the flange is an annular bead and the means defining an aperture comprises a radially inwardly extending integral projection.
5. In combination, a support body and an annu lar pulley body substantially as herein decribed with reference to and as shown in Figure 1 or with reference to and as shown in Figure 2 of the accompanying drawings.
GB08219387A 1981-07-09 1982-07-05 A combination of a support body and an annular pulley body Expired GB2103332B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE8120072 1981-07-09

Publications (2)

Publication Number Publication Date
GB2103332A true GB2103332A (en) 1983-02-16
GB2103332B GB2103332B (en) 1985-02-27

Family

ID=6729219

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08219387A Expired GB2103332B (en) 1981-07-09 1982-07-05 A combination of a support body and an annular pulley body

Country Status (3)

Country Link
FR (1) FR2509409A1 (en)
GB (1) GB2103332B (en)
IT (2) IT1190900B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156036A (en) * 1984-03-21 1985-10-02 Ina Bearing Co Tensioning pulley

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8235715U1 (en) * 1982-12-18 1983-03-24 Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt Tension pulley for drive belt
DE8515561U1 (en) * 1985-05-25 1985-07-11 SKF GmbH, 8720 Schweinfurt Support body

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3043287C2 (en) * 1979-12-12 1985-12-05 Nippon Seiko K.K., Tokio/Tokyo Device for tensioning a transmission traction device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156036A (en) * 1984-03-21 1985-10-02 Ina Bearing Co Tensioning pulley

Also Published As

Publication number Publication date
IT8222304V0 (en) 1982-07-01
IT1190900B (en) 1988-02-24
FR2509409A1 (en) 1983-01-14
GB2103332B (en) 1985-02-27
IT8222187A0 (en) 1982-07-01
FR2509409B1 (en) 1984-04-13
IT8222187A1 (en) 1984-01-01

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920705