EP0956461A1 - Brake bearing and camshaft assemblies - Google Patents
Brake bearing and camshaft assembliesInfo
- Publication number
- EP0956461A1 EP0956461A1 EP98901410A EP98901410A EP0956461A1 EP 0956461 A1 EP0956461 A1 EP 0956461A1 EP 98901410 A EP98901410 A EP 98901410A EP 98901410 A EP98901410 A EP 98901410A EP 0956461 A1 EP0956461 A1 EP 0956461A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- bush
- bearing assembly
- camshaft
- bearing
- 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- Withdrawn
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
- F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
- F16C23/02—Sliding-contact bearings
- F16C23/04—Sliding-contact bearings self-adjusting
- F16C23/043—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings
- F16C23/045—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings for radial load mainly, e.g. radial spherical plain bearings
-
- 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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/102—Construction relative to lubrication with grease as lubricant
-
- 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
- F16C33/74—Sealings of sliding-contact bearings
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
- F16D65/22—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for pressing members apart, e.g. for drum brakes
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
- F16D2125/22—Mechanical mechanisms converting rotation to linear movement or vice versa acting transversely to the axis of rotation
- F16D2125/28—Cams; Levers with cams
- F16D2125/30—Cams; Levers with cams acting on two or more cam followers, e.g. S-cams
Definitions
- This invention concerns brake bearing and camshaft assemblies for vehicle brakes.
- Camshafts for vehicle brakes are supported in bearing assemblies for rotation to operate the brakes.
- bearing assemblies generally comprise self-aligning plain bearings and this invention concerns such bearing assemblies, which are also suitable for use in other applications in which a shaft is supported for rotation.
- a self aligning plain bearing assembly for a vehicle brake camshaft comprises a housing having a part spherical inner bearing surface within which a bearing bush is retained, the bush having a plain bore providing a journal adapted in use to receive and rotatably support a camshaft and a part spherical outer surface which co-operates with the part spherical inner surface of the housing, characterised in that the bush has an axially extending recess, and the housing has an inwardly projecting protrusion engaged in the recess whereby the bush is enabled to tilt with respect to the housing but is restrained from rotating relative thereto.
- the housing may comprise two assembled half housing members with complementary part spherical inner bearing surfaces which retain the bush for articulation therein.
- Each half housing member may extend beyond the bearing bush to receive and retain an elastomeric sealing ring, for example an O ring, the extension having a part spherical inner surface for engagement by the O ring, to be followed by the O ring as the bush articulates.
- an elastomeric sealing ring for example an O ring
- a half housing member may be provided with a clearance hole to receive, and allow movement of, a grease nipple inserted though the hole and into a receiving hole in the bush.
- An elastomeric seal may be provided between the half housing member and a flange of the nipple to inhibit ingress of foreign matter through the clearance hole to the bearing surfaces.
- the bush may have a transfer hole opposite the receiving hole to permit passage of lubricant from the bush bore to the part spherical surfaces.
- the housing or bush will incorporate a channel or channels to distribute lubricant around the part spherical surfaces from the transfer hole to the clearance hole in the housing, where excess lubricant has ab escape passage past the elastomeric seal.
- An end, or each of the axially opposed ends, of the housing may be formed or arranged to provide a surface to receive a sealing boot adapted to be fitted between the bearing assembly and a camshaft received in and supported by the bearing assembly in use, to inhibit access of foreign matter to the bearing surfaces of the bearing assembly and shaft.
- the shaft may have an annular groove adjacent the bearing assembly and in which a sealing boot as aforementioned is received and located. Where it is desired to fit a sealing boot at each end of the bearing housing an annular groove may be provided in the shaft to receive and locate each sealing boot.
- a camshaft 1 has an S cam 2 at one end.
- a shoulder 3 Adjacent to the shoulder 3 an annular groove 4 is machined in which a first sealing boot 5 is received and located.
- a bearing assembly 6 is assembled to the camshaft, being located relative to the camshaft by a spring ring and groove arrangement such as is described in our prior British Patent No. EP 0504243. This is followed by a second sealing boot 7 which is engaged in a tapered groove 8 in the camshaft 1.
- the bearing assembly 6 has a housing formed by first and second half housing members 9, 11 which are secured together to retain sealing rings 12 and bush 13.
- the half housing members 9, 11 and bush 13 have part spherical bearing surfaces whereby the bush is supported and retained with freedom to articulate.
- the first half housing member 9 is punched in to form a key which engages in an axially arranged slot 14 in the bush 13 to prevent rotation of the bush, whilst allowing articulation.
- the second half housing member 11 has a clearance hole 15 through which the stem of a grease nipple 16 is inserted into a hole in the bush 13 which is countersunk to receive it.
- a sealing ring 17 is interposed between the grease nipple 16 and the second half housing member 11.
- the grease nipple 16 may be a press fit in, or for example screw threaded into, the bush 13 and the depth of the countersink may control the compression of sealing ring 17 to effect a seal and ensure lubricant is retained in the bearing assembly 6.
- the bore of the bush 13 is provided with channels to convey lubricant from the grease nipple 16 across the bearing area of the bush.
- Those parts of the half housing members 9, 11 which retain and are engaged by the O rings 12 are preferably shaped to be part spherical internally so that when the bush 13 articulates the O rings maintain sealing effectiveness between bush, half housing and shaft.
- the first sealing boot 5 is generally L shaped and has two sealing lips which sealingly engage on the first half housing member 9.
- the second sealing boot 7 is generally Z shaped and has two sealing lips which sealingly engage on the second half housing member 11.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9701902.0A GB9701902D0 (en) | 1997-01-30 | 1997-01-30 | Brake camshaft and bearing assemblies |
GB9701902 | 1997-01-30 | ||
PCT/GB1998/000258 WO1998034043A1 (en) | 1997-01-30 | 1998-01-28 | Brake bearing and camshaft assemblies |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0956461A1 true EP0956461A1 (en) | 1999-11-17 |
Family
ID=10806820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98901410A Withdrawn EP0956461A1 (en) | 1997-01-30 | 1998-01-28 | Brake bearing and camshaft assemblies |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0956461A1 (en) |
AU (1) | AU5774198A (en) |
GB (2) | GB9701902D0 (en) |
TW (1) | TW394829B (en) |
WO (1) | WO1998034043A1 (en) |
ZA (1) | ZA98757B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6237732B1 (en) * | 1999-06-16 | 2001-05-29 | Meritor Heavy Vehicle Systems, Llc | Bushing boot for a cam braking system |
US6550780B1 (en) * | 1999-12-03 | 2003-04-22 | Meritor Heavy Vehicle Systems, Llc | Washer seal for a cam braking system |
DE102014106652A1 (en) * | 2014-05-12 | 2015-11-12 | Bpw Bergische Achsen Kg | Camshaft bearing and seal for this |
FR3135493B1 (en) * | 2022-05-11 | 2024-03-29 | Skf Aerospace France | Plain bearing assembly, and associated assembly methods |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1183469A (en) * | 1966-06-20 | 1970-03-04 | North American Rockwell | Internal Shoe-Drum Brake Camshaft Mounting |
US3754802A (en) * | 1972-01-25 | 1973-08-28 | Mpb Corp | Self-aligning bearing assembly |
US3794393A (en) * | 1972-06-29 | 1974-02-26 | Borg Warner | Roller bearing assembly |
GB2041109B (en) * | 1979-01-06 | 1983-03-09 | Rubery Owen Rockwell Ltd | Bearing assemblies |
JPS60205011A (en) * | 1984-03-28 | 1985-10-16 | Hitachi Ltd | Self-lubricating bearing |
GB8927639D0 (en) * | 1989-12-07 | 1990-02-07 | Rubery Owen Rockwell Ltd | Bearing assemblies |
GB2269427A (en) * | 1989-12-07 | 1994-02-09 | Rubery Owen Rockwell Ltd | Bearing assembly |
DE4112791C1 (en) * | 1991-04-19 | 1992-07-16 | Trw Ehrenreich Gmbh & Co Kg, 4000 Duesseldorf, De | Axial strut joint with housing and bearing shell(s) - has L=shaped clamping ring, whose axial shank is radially resilient |
US5547288A (en) * | 1995-02-24 | 1996-08-20 | Euclid Industries, Inc. | Camshaft bushing assembly |
DE29611964U1 (en) * | 1996-07-10 | 1996-09-05 | Bpw Bergische Achsen Kg | Plain bearing bush |
-
1997
- 1997-01-30 GB GBGB9701902.0A patent/GB9701902D0/en active Pending
-
1998
- 1998-01-28 GB GB9801683A patent/GB2321677B/en not_active Expired - Fee Related
- 1998-01-28 EP EP98901410A patent/EP0956461A1/en not_active Withdrawn
- 1998-01-28 AU AU57741/98A patent/AU5774198A/en not_active Abandoned
- 1998-01-28 WO PCT/GB1998/000258 patent/WO1998034043A1/en not_active Application Discontinuation
- 1998-01-29 ZA ZA98757A patent/ZA98757B/en unknown
- 1998-03-03 TW TW087102067A patent/TW394829B/en active
Non-Patent Citations (1)
Title |
---|
See references of WO9834043A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1998034043A1 (en) | 1998-08-06 |
GB9801683D0 (en) | 1998-03-25 |
ZA98757B (en) | 1998-07-27 |
GB9701902D0 (en) | 1997-03-19 |
GB2321677A (en) | 1998-08-05 |
TW394829B (en) | 2000-06-21 |
GB2321677B (en) | 2000-10-04 |
AU5774198A (en) | 1998-08-25 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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Effective date: 19990816 |
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18D | Application deemed to be withdrawn |
Effective date: 20010801 |
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