EP2054293A1 - Bearing arrangement for a bicycle - Google Patents

Bearing arrangement for a bicycle

Info

Publication number
EP2054293A1
EP2054293A1 EP06776294A EP06776294A EP2054293A1 EP 2054293 A1 EP2054293 A1 EP 2054293A1 EP 06776294 A EP06776294 A EP 06776294A EP 06776294 A EP06776294 A EP 06776294A EP 2054293 A1 EP2054293 A1 EP 2054293A1
Authority
EP
European Patent Office
Prior art keywords
bearing arrangement
arrangement according
bearing
housing
sealing
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.)
Withdrawn
Application number
EP06776294A
Other languages
German (de)
French (fr)
Inventor
Bernhard Bauer
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 AB
Original Assignee
SKF AB
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 AB filed Critical SKF AB
Publication of EP2054293A1 publication Critical patent/EP2054293A1/en
Withdrawn legal-status Critical Current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
    • F16C33/76—Sealings of ball or roller bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M3/00—Construction of cranks operated by hand or foot
    • B62M3/003—Combination of crank axles and bearings housed in the bottom bracket
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/20—Land vehicles
    • F16C2326/28—Bicycle propulsion, e.g. crankshaft and its support

Definitions

  • the invention relates to a bearing arrangement for a foot pedal of a bicycle, which has a shaft element which is arranged in a housing by means of a bearing, wherein the bearing is sealed against the environment by at least one sealing device.
  • a bearing arrangement according to this design is known from DE 90 14 394 Ul.
  • the foot pedal of a bicycle and specifically the shaft element of it is borne by two annular contact ball bearings.
  • a ring-shaped sealing element with a sealing lip is arranged in the axial end region of the bearing arrangement wherein the sealing element is connected with the housing and wherein the sealing lip contacts a surface of the shaft element.
  • DE 40 24 426 Al seals a bearing arrangement of the above design concept by employing a felt ring.
  • the felt ring is connected with a part which is fixed to the housing and rubs against a radial seat of the shaft element.
  • the s o l u t i o n according to the invention is characterized in that the sealing device of the bearing arrangement has a seal carrier which is arranged directly or indirectly on the shaft element, wherein at least one sealing ring with at least one sealing lip is connected to the seal carrier and wherein at least one sealing lip is in contact with the face side of the housing.
  • the contact area of the face side which is contacted by the sealing lip is flat.
  • An alternative embodiment of the invention is characterized in that the face side of the housing has a ring groove in which the sealing lip is partially axially inserted.
  • the face side is any side region of the housing which perpendicular is orientated or directed into the axial direction of the bearing arrangement.
  • the face side in the meaning of the invention can be a recess (groove) machined in the side region of the housing.
  • the housing consists of all parts which are connected during ordinary use of the bearing arrangement, e. g. side rings or washers which are connected to the carrier element of the housing which bears the bearing and which is connected with a frame part of the bicycle.
  • the solution according to the concept where the ring groove is employed in which the sealing lip is partially axially inserted has preferably a design in which the ring groove has a rectangular cross section.
  • the sealing lip can contact a first face of the ring groove which has a perpendicular oriented in axial direction of the bearing arrangement.
  • the sealing Hp can contact a second face of the ring groove which has a perpendicular oriented in radial direction of the bearing arrangement.
  • the sealing ring can have at least two sealing lips which contact the first face of the ring groove and the second face of the ring groove.
  • the bearing has two bearing elements arranged in axial distance.
  • the bearing elements can be ball bearings or roller bearings.
  • a preferred embodiment has a design where at least one of the raceways of the bearings is made from a sheet metal part which is inserted onto the shaft element and/or into the housing.
  • the housing consists at least partially, preferably completely, of plastic material.
  • the shaft element and/or the housing has at least one raceway for a ball or rolling element which is machined directly into the material of the shaft element and/or the housing.
  • the shaft element and/or the housing has at least one seat on which a raceway is arranged.
  • a raceway carrier can be arranged on the shaft element which carries a raceway for a ball or rolling element.
  • the raceway carrier can consist of plastic material.
  • one of the raceways and/or the raceway carrier can be sealed by means of an O-ring.
  • the shaft element can have a tubular shape.
  • Fig. 1 a radial cross section of a bearing arrangement for a foot pedal of a bicycle according to a first design
  • Fig. 2 a radial cross section of such a bearing arrangement according to a second design
  • FIG. 3 the left region of the housing with the sealing device according to fig. 1 in enlarged depiction.
  • Fig. 1 shows a bearing arrangement 1 by which a foot pedal 2 of a bicycle is borne.
  • the foot pedal 2 has or is in the middle region a shaft element 3 which is kept in its position relatively to a housing 4 by means of a bearing 5.
  • the bearing 5 consists of two bearing elements 5' and 5", which both are annular contact ball bearings.
  • the housing 4 is a substantial sleeve-like element which is made from plastic material, e. g. from thermoplastic material.
  • Each sealing device 6 has a ring-shaped seal carrier 7 which is connected with the shaft 3 and rotates during use of the bearing arrangement 1.
  • a sealing ring 8 is fixed. It can be that the sealing ring 8 is connected to the seal carrier 7 by a vulcanisation process. By vulcanizing the seal carrier can partly or completely be covered with the material of the sealing ring 8.
  • the sealing ring 8 is made of a typical sealing material, e. g. rubber, while the seal carrier 7 is preferably made of metal.
  • the sealing ring 8 has at least one, preferably two sealing
  • the housing 4 has a ring groove 12 at its face sides 10.
  • the groove 12 has a substantial rectangular form in cross section with a first face 13 and a second face 14.
  • the face 13 has a perpendicular directed in axial direction A of the bearing arrangement 1.
  • the face 14 has a perpendicular directed in radial direction R.
  • the housing 4 has two seats 20 and 21 for receiving raceways 15 and 16 for the balls 19 of the bearing elements 5', 5".
  • the shaft element 2 is machine (turned) in that way that a seat 23 is formed for receiving a raceway 18. So, the seats 21 and 23 of the housing 4 and the shaft elements 2 together with the raceways 16 and 18 and the balls 19 form the bearing element 5".
  • a raceway carrier 24 with ring-shaped geometry (preferably made from plastic material) and with a seat 22 is pressed on the shaft element 2 in the depicted position, which receives the raceway 17.
  • the bearing element 5' is consequently established by the raceway carrier 24, the seats 20 and 22, the raceways 15 and 17 and the balls 19.
  • AU raceways 15, 16, 17, 18 are made of sheet metal. To ensure a tight seal effect an O-ring 25 is located between the raceway carrier 24 and the shaft element 3.
  • the embodiment according to fig. 2 has a different design insofar as the face sides 10 of the housing 4 have no groove 12 but have a flat contact area 11. This area 11 is contacted by the sealing lip 9 of the sealing ring 8.
  • the solution according to fig. 2 uses interlocking means 29 (spring-like elements) to axially secure the single elements to create the depicted formation of components.
  • the shaft element 3 has a substantial cylindrical outer circumference.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Sealing Of Bearings (AREA)

Abstract

The invention relates to a bearing arrangement (1) for a foot pedal (2) of a bicycle, which has a shaft element (3) which is arranged in a housing (4) by means of a bearing (5), wherein the bearing (5) is sealed against the environment by at least one sealing device (6). To improve the sealing effect of the bearing arrangement the invention is characterized in that the sealing device (6) has a seal carrier (7) which is arranged directly or indirectly on the shaft element (3), wherein at least one sealing ring (8) with at least one sealing lip (9) is connected to the seal carrier (7) and wherein at least one sealing lip (9) is in contact with the face side (10) of the housing (4).

Description

D e s c r i p t i o n
BEARING ARRANGEMENT FOR A BICYCLE
The invention relates to a bearing arrangement for a foot pedal of a bicycle, which has a shaft element which is arranged in a housing by means of a bearing, wherein the bearing is sealed against the environment by at least one sealing device.
A bearing arrangement according to this design is known from DE 90 14 394 Ul. Here, the foot pedal of a bicycle and specifically the shaft element of it is borne by two annular contact ball bearings. To seal the inner of the bearings against the environment a ring-shaped sealing element with a sealing lip is arranged in the axial end region of the bearing arrangement wherein the sealing element is connected with the housing and wherein the sealing lip contacts a surface of the shaft element.
DE 40 24 426 Al seals a bearing arrangement of the above design concept by employing a felt ring. The felt ring is connected with a part which is fixed to the housing and rubs against a radial seat of the shaft element.
Similar solutions are know from DE 697 21 955 Tl, CH 312 492, DE 198 56 626 Al and WO 99/04988 to seal a bearing arrangement for a foot pedal of a bicycle. It has been found that the ability of existing sealing arrangements to seal the inner of the bearings against influences of the environment and also to keep the lubricant inside the space of the bearings could be better.
Therefore, it is an o b j e c t of the invention to improve a bearing arrangement according to the above mentioned design concept to achieve better sealing abilities. So, the lifetime of the bearing arrangement should be enlarged.
The s o l u t i o n according to the invention is characterized in that the sealing device of the bearing arrangement has a seal carrier which is arranged directly or indirectly on the shaft element, wherein at least one sealing ring with at least one sealing lip is connected to the seal carrier and wherein at least one sealing lip is in contact with the face side of the housing.
According to a preferred embodiment of the invention the contact area of the face side which is contacted by the sealing lip is flat.
An alternative embodiment of the invention is characterized in that the face side of the housing has a ring groove in which the sealing lip is partially axially inserted.
So, it is to be understood that the face side is any side region of the housing which perpendicular is orientated or directed into the axial direction of the bearing arrangement. Also the face side in the meaning of the invention can be a recess (groove) machined in the side region of the housing.
It is to be understood that the housing consists of all parts which are connected during ordinary use of the bearing arrangement, e. g. side rings or washers which are connected to the carrier element of the housing which bears the bearing and which is connected with a frame part of the bicycle. The solution according to the concept where the ring groove is employed in which the sealing lip is partially axially inserted has preferably a design in which the ring groove has a rectangular cross section. The sealing lip can contact a first face of the ring groove which has a perpendicular oriented in axial direction of the bearing arrangement. Alternatively, the sealing Hp can contact a second face of the ring groove which has a perpendicular oriented in radial direction of the bearing arrangement. Also a combination is possible, i. e. the sealing ring can have at least two sealing lips which contact the first face of the ring groove and the second face of the ring groove.
Preferably, the bearing has two bearing elements arranged in axial distance. Here, the bearing elements can be ball bearings or roller bearings. Preferably annular contact ball bearings are employed.
A preferred embodiment has a design where at least one of the raceways of the bearings is made from a sheet metal part which is inserted onto the shaft element and/or into the housing.
It is beneficial if the housing consists at least partially, preferably completely, of plastic material.
Another solution is characterized in that the shaft element and/or the housing has at least one raceway for a ball or rolling element which is machined directly into the material of the shaft element and/or the housing. In an alternative solution the shaft element and/or the housing has at least one seat on which a raceway is arranged.
Furthermore, a raceway carrier can be arranged on the shaft element which carries a raceway for a ball or rolling element. The raceway carrier can consist of plastic material. To further improve the sealing ability one of the raceways and/or the raceway carrier can be sealed by means of an O-ring.
Finally, the shaft element can have a tubular shape.
By the proposed design of a bearing arrangement an improved sealing effect of the bearing arrangement can be achieved. Furthermore, the weight of the arrangement can be minimized by using plastic elements instead of metal elements.
The drawings show preferred embodiments of the invention. The figures show:
Fig. 1 a radial cross section of a bearing arrangement for a foot pedal of a bicycle according to a first design,
Fig. 2 a radial cross section of such a bearing arrangement according to a second design and
Fig. 3 the left region of the housing with the sealing device according to fig. 1 in enlarged depiction.
Fig. 1 shows a bearing arrangement 1 by which a foot pedal 2 of a bicycle is borne. The foot pedal 2 has or is in the middle region a shaft element 3 which is kept in its position relatively to a housing 4 by means of a bearing 5. The bearing 5 consists of two bearing elements 5' and 5", which both are annular contact ball bearings. The housing 4 is a substantial sleeve-like element which is made from plastic material, e. g. from thermoplastic material.
To protect the bearing 5 against influences of the environment and to make sure that lubricant remains inside the space of the bearing 5 sealing devices 6 are located in both axial end regions of the housing 4. Each sealing device 6 has a ring-shaped seal carrier 7 which is connected with the shaft 3 and rotates during use of the bearing arrangement 1. At the radial end of the seal carrier 7 a sealing ring 8 is fixed. It can be that the sealing ring 8 is connected to the seal carrier 7 by a vulcanisation process. By vulcanizing the seal carrier can partly or completely be covered with the material of the sealing ring 8. The sealing ring 8 is made of a typical sealing material, e. g. rubber, while the seal carrier 7 is preferably made of metal. The sealing ring 8 has at least one, preferably two sealing
As can be seen from fig. 1 and fig. 3 the housing 4 has a ring groove 12 at its face sides 10. The groove 12 has a substantial rectangular form in cross section with a first face 13 and a second face 14. The face 13 has a perpendicular directed in axial direction A of the bearing arrangement 1. The face 14 has a perpendicular directed in radial direction R.
As can be further seen the housing 4 has two seats 20 and 21 for receiving raceways 15 and 16 for the balls 19 of the bearing elements 5', 5". Correspondingly, the shaft element 2 is machine (turned) in that way that a seat 23 is formed for receiving a raceway 18. So, the seats 21 and 23 of the housing 4 and the shaft elements 2 together with the raceways 16 and 18 and the balls 19 form the bearing element 5".
To form the bearing element 5' a raceway carrier 24 with ring-shaped geometry (preferably made from plastic material) and with a seat 22 is pressed on the shaft element 2 in the depicted position, which receives the raceway 17. The bearing element 5' is consequently established by the raceway carrier 24, the seats 20 and 22, the raceways 15 and 17 and the balls 19.
AU raceways 15, 16, 17, 18 are made of sheet metal. To ensure a tight seal effect an O-ring 25 is located between the raceway carrier 24 and the shaft element 3.
The embodiment according to fig. 2 has a different design insofar as the face sides 10 of the housing 4 have no groove 12 but have a flat contact area 11. This area 11 is contacted by the sealing lip 9 of the sealing ring 8.
To axially fix the different components of the bearing arrangement 1 well known methods can be used. A specific design is depicted in fig. 1 and 2.
In fig. 1 the right seal carrier 7 is pressed on a cylindrical seat 26 of the shaft element 3 until it axially contacts a shoulder 27. The raceways 15, 16, 17, 18 are arranged as explained above. The same applies for the raceway carrier 24 and the O-ring 25. To axially fix the whole arrangement the left seal carrier 7 is axially shifted into the depicted position. To fix part 7 in this position snapping elements 28 are supplied in the seal carrier 7 as well as on the shaft element 3 correspondingly.
The solution according to fig. 2 uses interlocking means 29 (spring-like elements) to axially secure the single elements to create the depicted formation of components. Here the shaft element 3 has a substantial cylindrical outer circumference.
List of reference signs
1 Bearing arrangement
2 Foot pedal
3 Shaft element 4 Housing
5 Bearing
5' Bearing element
5" Bearing element
6 Sealing device 7 Seal carrier
8 Sealing ring
9 Sealing lip 9' Sealing lip 9" Sealing lip 10 Face side of the housing
11 Contact area
12 Ring groove
13 First face of the ring groove
14 Second face of the ring groove 15 Raceway
16 Raceway
17 Raceway
18 Raceway
19 Ball / rolling element 20 Seat 1 Seat 2 Seat 3 Seat 4 Raceway carrier
25 O-ring
26 Seat
27 Shoulder
28 Snapping element
29 Interlocking means
A Axial direction
R Radial direction

Claims

C l a i m sBearing Arrangement for a Foot Pedal of a Bicycle
1. Bearing arrangement (1) for a foot pedal (2) of a bicycle, which has a shaft element (3) which is arranged in a housing (4) by means of a bearing (5), wherein the bearing (5) is sealed against the environment by at least one sealing device (6),
characterized in that
the sealing device (6) has a seal carrier (7) which is arranged directly or indirectly on the shaft element (3), wherein at least one sealing ring (8) with at least one sealing lip (9) is connected to the seal carrier (7) and wherein at least one sealing lip (9) is in contact with the face side (10) of the housing (4).
2. Bearing arrangement according to claim 1, characterized in that the contact area (11) of the face side (10) which is contacted by the sealing lip (9) is flat.
3. Bearing arrangement according to claim 1, characterized in that the face side (10) of the housing (4) has a ring groove (12) in which the sealing lip (9) is partially axially inserted.
4. Bearing arrangement according to claim 3, characterized in that the ring groove (12) has a rectangular cross section.
5. Bearing arrangement according to claim 3 or 4, characterized in that the sealing lip (9) contacts a first face (13) of the ring groove (12) which has a perpendicular oriented in axial direction (A) of the bearing arrangement (1).
6. Bearing arrangement according to claim 3 or 4, characterized in that the sealing lip (9) contacts a second face (14) of the ring groove (12) which has a perpendicular oriented in radial direction (R) of the bearing arrangement (1).
7. Bearing arrangement according to claim 5 and 6, characterized in that the sealing ring (8) has at least two sealing lips (9', 9") which contact the first face (13) of the ring groove (12) and the second face (14) of the ring groove (12).
8. Bearing arrangement according to at least one of claims 1 till 7, characterized in that the bearing (5) has two bearing elements (5', 5") arranged in axial distance.
9. Bearing arrangement according to claim 8, characterized in that the bearing elements (5', 5") are ball bearings or roller bearings.
10. Bearing arrangement according to claim 9, characterized in that the bearing elements (5', 5") are annular contact ball bearings.
11. Bearing arrangement according to claim 9 or 10, characterized in that at least one of the raceways (15, 16, 17, 18) of the bearings (51, 5") is made from a sheet metal part which is inserted onto the shaft element (3) and/or into the housing (4).
12. Bearing arrangement according to at least one of claims 1 till 11, characterized in that the housing (4) consists at least partially, preferably completely, of plastic material.
13. Bearing arrangement according to at least one of claims 1 till 12, characterized in that the shaft element (3) and/or the housing (4) has at least one raceway for a ball or rolling element (19) which is machined directly into the material of the shaft element (3) and/or the housing (4).
14. Bearing arrangement according to at least one of claims 1 till 12, characterized in that the shaft element (3) and/or the housing (4) has at least one seat (20, 21, 22, 23) on which a raceway (15, 16, 17, 18) is arranged.
15. Bearing arrangement according to at least one of claims 1 till 14, characterized in that a raceway carrier (24) is arranged on the shaft element (3) which carries a raceway (15, 16, 17, 18) for a ball or rolling element (19).
16. Bearing arrangement according to claim 15, characterized in that the raceway carrier (24) consists of plastic material.
17. Bearing arrangement according to claim 15 or 16, characterized in that at least one of the raceways (15, 16, 17, 18) and/or the raceway carrier (24) is sealed by means of an O-ring (25).
18. Bearing arrangement according to at least one of claims 1 till 17, characterized in that the shaft element (3) has a tubular shape.
EP06776294A 2006-07-19 2006-07-19 Bearing arrangement for a bicycle Withdrawn EP2054293A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2006/007073 WO2008009301A1 (en) 2006-07-19 2006-07-19 Bearing arrangement for a bicycle

Publications (1)

Publication Number Publication Date
EP2054293A1 true EP2054293A1 (en) 2009-05-06

Family

ID=37818186

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06776294A Withdrawn EP2054293A1 (en) 2006-07-19 2006-07-19 Bearing arrangement for a bicycle

Country Status (2)

Country Link
EP (1) EP2054293A1 (en)
WO (1) WO2008009301A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUA20163214A1 (en) * 2016-05-06 2017-11-06 Campagnolo Srl Bicycle bottom bracket
EP3501960B1 (en) * 2017-12-22 2021-11-10 Campagnolo S.r.l. Bicycle bottom bracket
DE102023210376A1 (en) * 2023-10-20 2025-04-24 Shimano Inc. PEDAL FOR A HUMAN-POWERED VEHICLE

Citations (1)

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Publication number Priority date Publication date Assignee Title
JPS62228760A (en) * 1986-03-31 1987-10-07 Toyo Electric Mfg Co Ltd Shaft seal device

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CH312492A (en) 1952-10-06 1955-12-31 Schwanden Sks Fahrradwerke Ag Dust and water protection device on ball bearings.
EP0193178B1 (en) * 1985-02-26 1989-05-31 Maeda Industries, Ltd. A bicycle freewheel assembly
DE8708234U1 (en) * 1987-06-11 1987-07-30 SKF GmbH, 8720 Schweinfurt Non-contact sealing of a bearing
US6755095B2 (en) * 2001-11-23 2004-06-29 Shimano, Inc. Bicycle crank assembly and assembly tools
DE4024426A1 (en) 1990-08-01 1992-02-06 Robert Schmitt UNIVERSAL BICYCLE PRECISION BOTTOM BEARING UNIT
DE9014394U1 (en) 1990-10-17 1991-01-03 Skf Gmbh, 97421 Schweinfurt Sealing for bearings, especially for pedal axle bearings of bicycles
US5398942A (en) * 1992-09-02 1995-03-21 Dana Corporation Annular lubricant seal assembly
EP0849154B1 (en) 1996-12-20 2003-05-14 Shimano Inc. Hollow crank spindle unit for bicycles
DE19731451A1 (en) 1997-07-22 1999-01-28 Dt Bike Technology Ag Hub, especially for bicycles and the like
DE19856626B4 (en) 1998-12-08 2008-10-09 Dt Swiss Ag Hub and impeller, especially for bicycles
AUPQ703400A0 (en) * 2000-04-19 2000-05-18 Jlv Industries Pty Ltd Conveyor roller bearing housing
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JPS62228760A (en) * 1986-03-31 1987-10-07 Toyo Electric Mfg Co Ltd Shaft seal device

Non-Patent Citations (1)

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Title
See also references of WO2008009301A1 *

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