GB2313417A - Cover for bearings - Google Patents

Cover for bearings Download PDF

Info

Publication number
GB2313417A
GB2313417A GB9709695A GB9709695A GB2313417A GB 2313417 A GB2313417 A GB 2313417A GB 9709695 A GB9709695 A GB 9709695A GB 9709695 A GB9709695 A GB 9709695A GB 2313417 A GB2313417 A GB 2313417A
Authority
GB
United Kingdom
Prior art keywords
cover
bearings
retaining projections
periphery
mounting
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
GB9709695A
Other versions
GB9709695D0 (en
GB2313417B (en
Inventor
Helmut Hauck
Dieter Ploessl
Armin Schlereth
Bettina Stoeber
Robert Stolz
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 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 GmbH filed Critical SKF GmbH
Publication of GB9709695D0 publication Critical patent/GB9709695D0/en
Publication of GB2313417A publication Critical patent/GB2313417A/en
Application granted granted Critical
Publication of GB2313417B publication Critical patent/GB2313417B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers
    • 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
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • F16C43/045—Mounting or replacing seals
    • 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
    • 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
    • F16C19/08—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 two or more rows of 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/50—Positive connections
    • F16C2226/70—Positive connections with complementary interlocking parts
    • F16C2226/74—Positive connections with complementary interlocking parts with snap-fit, e.g. by clips
    • 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)
  • Rolling Contact Bearings (AREA)
  • Pulleys (AREA)
  • Sealing Devices (AREA)
  • Closures For Containers (AREA)

Abstract

A cover 6 for a rolling bearing comprises a peripherally-extending locating element 10, which is a snap-fit in a radial groove 7 in the bearing race 3. The cover also comprises peripherally-spaced, radially-directed projections 11, which bear under preloading against the circumferential surface 5 of the race, and serve to prevent relative rotation between the cover and the race. The cover is made in one piece from plastics material.

Description

COVER FOR BEARINGS The invention relates to a cover for bearings.
Covers of this type are used for protecting roller bearings or pivotal mountings of tensioning devices from the ingress of dirt, water, etc. For example, they are secured to the outer ring or builtin component of the bearing by snap-fit members. A simple solution has been found to be a radial groove into which are snap-fitted locating members of the cover which is injection-moulded in one piece from plastics material. The radial groove is usually provided with inclined abutment surfaces, whereby the cover is stabilised and a satisfactory seal is achieved. The shape of the cover is adapted to the installation conditions and may be disc-shaped or cupshaped, whereby the entire bearing chamber and the end face of the axis, etc. is covered.
DE-GM 93 20 478, for example, discloses a cover but without an annular groove on the mounting.
To prevent the cover from rotating in the annular groove and thereby creating an unreliable seal, a powerful radial clamping action is to be achieved by suitable choice of dimensions. However, this renders fitting more difficult and often leads, unobserved, to damage to the cover and thereby to an inadequate seal.
The invention has the object of devising a cover of the type mentioned in the introduction, which can be installed so that it is reliably prevented from rotation but assures a uniformly satisfactory seal and easy fitting.
This object is achieved by radially directed retaining projections which are spaced apart on the periphery, which bear, under preloading, against a circumferential surface of the mounting and which act in a manner precluding relative rotation.
The invention therefore provides a cover for bearings of tensioning devices or the like, with locating elements extending over the periphery and engaging in a radial groove, with portions for centering and axially abutting the mounting, characterised by radially directed retaining projections which are spaced apart on the periphery, which bear, under preloading, against a circumferential surface of the mounting and which act in a manner precluding relative rotation.
The features of the invention will be described below with reference to one example of an embodiment illustrated in the drawings, wherein: Fig. 1 shows a partial longitudinal section through a tensioning pulley with a cover; Fig. 2 shows an enlarged view of the fastening according to detail X in Figure 1; and Fig. 3 shows a partial cross-section along the line A-A in Figure 2.
The tensioning pulley illustrated in the drawings (not shown in detail) is mounted with an inner ring 1 on a support stud 2 and on an outer ring 3 is provided with an outer running surface 4. A part of the circumferential surface 5 of the outer ring 3 is left free and is provided for receiving a cover 6.
For this purpose a radial groove 7 is incorporated in the outer ring 3.
The cover 6 is substantially cup-shaped with a flat peripheral portion 8 and is made in one piece from plastics material. A cylindrical extension 9 is formed integrally thereon, on the bore surface of which there is an annular radial projection 10 of a shape adapted to the profile of the annular groove 7.
As is more clearly evident from Figures 2 and 3, retaining projections 11, spaced apart on the periphery, are provided between the radial projection 10 and the peripheral portion 8. The retaining projections 11 are relatively narrow in a peripheral direction and are wedge-shaped. In the example of one embodiment illustrated three of these retaining projections 11 are disposed offset by 120 degrees.
When fitting the cover 6, the cylindrical extension 9 is initially widened via a lead-in slope 12 within the elastic region of the plastic material.
When pushed on further the radial projection 10 engages with the radial groove 7 and draws the cover 6 over the inclined groove surfaces of the radial groove 7 until the peripheral portion 8 abuts against the lateral surface of the outer ring 3.
The strong restoring forces of the flared cylindrical extension 9 induce an almost complete deformation of the three small-volume retaining projections 11 on the relevant portion of the circumferential surface 5 of the outer ring 3. In this way an exceptionally powerful surface pressure occurs at the three peripheral locations in combination with the outer ring 3 and, therefore, a very effective force-locking antirotational feature is provided.
In addition to the aforementioned annularly closed shape of the cylindrical extension 9 and of the radial projection 10, they can also be divided into individually acting portions by separating slots.

Claims (3)

  1. CLAIMS: 1. A cover for bearings of tensioning devices or the like, with locating elements extending over the periphery and engaging in a radial groove, with portions for centering and axially abutting the mounting, characterised by radially directed retaining projections (11) which are spaced apart on the periphery, which bear, under preloading, against a circumferential surface (5) of the mounting and which act in a manner precluding relative rotation.
  2. 2. A cover according to Claim 1, characterised by retaining projections (11) of wedge-shaped section and disposed within the bending region of the locating elements (10).
  3. 3. A cover substantially as hereinbefore described with reference to and as shown in the accompanying drawing.
GB9709695A 1996-05-25 1997-05-13 Cover for bearings Expired - Fee Related GB2313417B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE29609380U DE29609380U1 (en) 1996-05-25 1996-05-25 Lids for bearings

Publications (3)

Publication Number Publication Date
GB9709695D0 GB9709695D0 (en) 1997-07-02
GB2313417A true GB2313417A (en) 1997-11-26
GB2313417B GB2313417B (en) 1999-10-06

Family

ID=8024412

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9709695A Expired - Fee Related GB2313417B (en) 1996-05-25 1997-05-13 Cover for bearings

Country Status (4)

Country Link
DE (1) DE29609380U1 (en)
FR (1) FR2749048B1 (en)
GB (1) GB2313417B (en)
IT (1) IT1294392B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7909717B2 (en) 2006-10-20 2011-03-22 Aktiebolaget Skf Tensioning roller device or winder
US8888372B2 (en) 2012-04-24 2014-11-18 Aktiebolaget Skf Sensor-carrier cap for a bearing of a wheel hub
CN110997445A (en) * 2017-08-23 2020-04-10 舍弗勒技术股份两合公司 Covering system for the axle of a wheel set of a rail vehicle

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29711143U1 (en) * 1997-06-26 1998-10-29 Sachsenring Entwicklungsgesellschaft mbH, 08058 Zwickau Bearing, especially for a jig
DE20019278U1 (en) * 2000-11-13 2001-04-05 Skf Gmbh Connection between a support element and a bearing
DE10333673A1 (en) 2003-07-24 2005-02-17 Ina-Schaeffler Kg Tension pulley for belt used in engine of vehicle, comprising sealing cap securing components of pulley unit
DE102005057297A1 (en) * 2005-12-01 2007-06-21 Schaeffler Kg Deflection pulley for a traction device
FR2902699B1 (en) 2006-06-26 2010-10-22 Skf Ab SUSPENSION STOP DEVICE AND FORCE LEG.
FR2906587B1 (en) 2006-10-03 2009-07-10 Skf Ab TENDERING ROLLER DEVICE.
FR2913081B1 (en) 2007-02-27 2009-05-15 Skf Ab DEBRAYABLE PULLEY DEVICE
DE102018114240A1 (en) * 2018-06-14 2019-12-19 Schaeffler Technologies AG & Co. KG roller bearing

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1205886A (en) * 1967-05-16 1970-09-23 Skf Svenska Kullagerfab Ab Improvements in or relating to covers for bearing housings and to bearing housings provided with such covers
GB1558311A (en) * 1977-04-06 1979-12-19 Schaeffler Waelzlager Kg Rolling bearing with front end cover cap
GB2058241A (en) * 1979-07-03 1981-04-08 Ransome Hoffmann Pollard Improvements in covers for rolling-element bearing assemblies

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1273698B (en) * 1994-07-28 1997-07-09 Dayco Europe Spa PROTECTION DEVICE FOR PULLEY BEARINGS IN BELT DRIVES

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1205886A (en) * 1967-05-16 1970-09-23 Skf Svenska Kullagerfab Ab Improvements in or relating to covers for bearing housings and to bearing housings provided with such covers
GB1558311A (en) * 1977-04-06 1979-12-19 Schaeffler Waelzlager Kg Rolling bearing with front end cover cap
GB2058241A (en) * 1979-07-03 1981-04-08 Ransome Hoffmann Pollard Improvements in covers for rolling-element bearing assemblies

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7909717B2 (en) 2006-10-20 2011-03-22 Aktiebolaget Skf Tensioning roller device or winder
US8888372B2 (en) 2012-04-24 2014-11-18 Aktiebolaget Skf Sensor-carrier cap for a bearing of a wheel hub
CN110997445A (en) * 2017-08-23 2020-04-10 舍弗勒技术股份两合公司 Covering system for the axle of a wheel set of a rail vehicle

Also Published As

Publication number Publication date
IT1294392B1 (en) 1999-03-24
FR2749048A1 (en) 1997-11-28
ITTO970400A0 (en) 1997-05-09
DE29609380U1 (en) 1996-08-14
GB9709695D0 (en) 1997-07-02
ITTO970400A1 (en) 1998-11-09
FR2749048B1 (en) 1999-06-18
GB2313417B (en) 1999-10-06

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Legal Events

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

Effective date: 20070513