WO1998034040A1 - Brake dust covers - Google Patents
Brake dust covers Download PDFInfo
- Publication number
- WO1998034040A1 WO1998034040A1 PCT/GB1998/000264 GB9800264W WO9834040A1 WO 1998034040 A1 WO1998034040 A1 WO 1998034040A1 GB 9800264 W GB9800264 W GB 9800264W WO 9834040 A1 WO9834040 A1 WO 9834040A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dust cover
- brake
- main portion
- camshaft
- opening
- 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.)
- Ceased
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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
- F16D51/16—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis
- F16D51/18—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes
- F16D51/20—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes extending in opposite directions from their pivots
- F16D51/22—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes extending in opposite directions from their pivots mechanically actuated
-
- 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
- F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
- F16D2051/001—Parts or details of drum brakes
- F16D2051/005—Protective 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
- 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
-
- 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
- F16D2125/44—Mechanical mechanisms transmitting rotation
- F16D2125/56—Shafts for transmitting torque directly
-
- 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
- F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
Definitions
- This invention relates to brake dust covers, for example dust covers for brakes fitted to axles for trailer vehicles, which are conventionally fitted with S cam operated internal expanding shoe and drum brakes.
- dust covers for such brakes comprise two half covers.
- the inner periphery of each half cover extends around approximately half the periphery of the axle beam and the outer periphery is lipped to fit with running clearance over a shoulder on the brake drum to minimise ingress of water and foreign matter.
- One half cover has a cut out portion to enable it to be passed over the brake camshaft.
- the half covers are secured to the brake anchor bracket with screws and they overlap a small amount at their radially extending edges.
- the dust cover has to be removed to gain access to the camshaft bearing which is fitted at the brake anchor bracket, for servicing and replacement.
- a brake dust cover characterised in that it comprises a main portion having an inner periphery which in use extends around about half of an axle beam, an outer periphery which extends to opposed extremities, which are separated by an arc of no more than 90 degrees centred on the axis of the axle beam, and an opening provided between the corresponding ends of the inner periphery and the opposed extremities, and a minor portion adapted to overlap and bridge the opening and be secured to the main portion, the minor portion conforming to the profile of the main portion where it overlaps and having an opening to receive a camshaft, the arrangement being such that when the camshaft has been removed a bearing assembly for the camshaft secured to a brake anchor bracket can be released and withdrawn through the opening in the minor portion without disturbing the dust cover.
- the arc over which the outer periphery extends will vary dependant on the diameter of the dust cover and the width of the camshaft bearing.
- a dust cover in accordance with the present invention provides a more rigid assembly than the prior art and facilitates servicing of the axle to which it is fitted.
- An embodiment of the invention also comprises an axle assembly fitted with a dust cover as set out herein.
- Figure 1 is an exploded view of parts of an axle assembly illustrating a prior art dust cover
- Figure 2 is a plan view of a main portion of a dust cover in accordance with the present invention.
- Figure 3 is a view on line A-A of Figure 2;
- Figure 4 is a plan view of a minor portion of the dust cover according to the present invention.
- Figure 5 is a section on line D-D of Figure 4.
- Figure 6 is a view on the lower surface of Figure 4
- Figure 7 is a view on arrow J of Figure 4.
- an axle beam 1 has a brake anchor bracket 2 secured to it.
- a brake camshaft 3 is supported in bearings in, or secured to, anchor bracket 2 and a mounting 4.
- Brake shoes 5, 6 pivot on anchor pins, as 7, at one end and have cam rollers (not shown) at their lower (not shown) ends for engagement with the S cam on camshaft 3.
- a dust cover of a known kind comprises two halves 8, 9, the latter of which has a cut out 11 to enable it to be fitted over the camshaft 3 for assembly to the brake anchor bracket 2.
- a main portion 12 has an inner periphery 12 which can fit over the axle beam and an opening 12 1 extends from the inner periphery to the extremities of an outer periphery 12 m and is sufficiently wide to allow servicing access to the camshaft bearing at the brake anchor bracket, for example as 2 on Figure 1 or as described and claimed in our prior British Patent No. EP 0504238.
- Main portion 12 has two radially extending slots 13 and holes 14, 15 and 16. Holes 15 register with corresponding tapped holes in the brake anchor bracket to receive screws to secure the main portion to the anchor bracket.
- Figures 4 to 7 illustrate a minor portion 17 of the dust cover having an opening 18 which, in this case, is designed to fit over a housing portion of a camshaft bearing secured to an anchor bracket.
- Two pins 19 are mounted on the minor portion 17 to be received in the holes 16 in the main portion 12 and holes 21 are provided to register with holes 14 of the main portion for securing the minor portion to the main portion.
- the pins 19 may be screw threaded to receive nuts to secure aadditionslall the minor portion to the main portion.
- the minor portion 17 may have holes, asl5 in hemain portion, to register with tapped holes in the brake anchor bracket so as to secure the minor portion to the brake anchor bracket.
- the opening 18 in the minor portion 17 allows access to the camshaft bearing securing screws. Following removal of the camshaft, for example after removal of the brake drum, the camshaft bearing can be released and removed via the opening 18 without disturbing the dust cover.
- the minor portion 17 can be released from the main portion 12 to allow removal of the camshaft and bearing assembly, as described in E.P. 0504238
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
A brake dust cover, e.g. for an internal expanding shoe and drum brake fitted to a trailer vehicle axle and operated by an S cam on a camshaft, comprises a main portion (12) and a minor portion (17). The main portion (12) has an inner periphery (121) which extends around about half of an axle beam to which the portion is fitted for use, an outer periphery (12111) which extends to opposed extremities separated by an arc of no more than 90° centred on the axle beam axis, and an opening (1211) from the inner to the outer periphery allowing access, for example, to a camshaft bearing at a brake anchor bracket on the axle beam. The minor portion (17) overlaps and bridges the opening (1211) and is secured to the main portion (12). Its profile conforms to that of the main portion where there is overlap. An opening (18) in the minor portion (17) can receive a camshaft and, when the camshaft has been removed, the opening allows the camshaft bearing to be withdrawn through it without disturbing the dust cover.
Description
BRAKE DUST COVERS
This invention relates to brake dust covers, for example dust covers for brakes fitted to axles for trailer vehicles, which are conventionally fitted with S cam operated internal expanding shoe and drum brakes.
Conventionally, dust covers for such brakes comprise two half covers. The inner periphery of each half cover extends around approximately half the periphery of the axle beam and the outer periphery is lipped to fit with running clearance over a shoulder on the brake drum to minimise ingress of water and foreign matter. One half cover has a cut out portion to enable it to be passed over the brake camshaft. The half covers are secured to the brake anchor bracket with screws and they overlap a small amount at their radially extending edges. The dust cover has to be removed to gain access to the camshaft bearing which is fitted at the brake anchor bracket, for servicing and replacement.
According to the present invention there is provided a brake dust cover characterised in that it comprises a main portion having an inner periphery which in use extends around about half of an axle beam, an outer periphery which extends to opposed extremities, which are separated by an arc of no more than 90 degrees centred on the axis of the axle beam, and an opening provided between the corresponding ends of the inner periphery and the opposed extremities, and a minor portion adapted to overlap and bridge the opening and be secured to the main portion, the minor portion conforming to the profile of the main portion where it overlaps and having an opening to receive a camshaft, the arrangement being such that when the camshaft has been removed a bearing assembly for the camshaft secured to a brake anchor bracket can be released and
withdrawn through the opening in the minor portion without disturbing the dust cover.
The arc over which the outer periphery extends will vary dependant on the diameter of the dust cover and the width of the camshaft bearing.
A dust cover in accordance with the present invention provides a more rigid assembly than the prior art and facilitates servicing of the axle to which it is fitted.
An embodiment of the invention also comprises an axle assembly fitted with a dust cover as set out herein.
An embodiment of the invention will now be described by way of example with reference to the accompanying drawings, in which:
Figure 1 is an exploded view of parts of an axle assembly illustrating a prior art dust cover;
Figure 2 is a plan view of a main portion of a dust cover in accordance with the present invention;
Figure 3 is a view on line A-A of Figure 2;
Figure 4 is a plan view of a minor portion of the dust cover according to the present invention;
Figure 5 is a section on line D-D of Figure 4;
Figure 6 is a view on the lower surface of Figure 4, and
Figure 7 is a view on arrow J of Figure 4.
Referring to Figure 1 , an axle beam 1 has a brake anchor bracket 2 secured to it. A brake camshaft 3 is supported in bearings in, or secured to, anchor bracket 2 and a mounting 4. Brake shoes 5, 6 pivot on anchor pins, as 7, at one end and have cam rollers (not shown) at their lower (not shown) ends for engagement with the S cam on camshaft 3. A dust cover of a known kind comprises two halves 8, 9, the latter of which has a cut out 11 to enable it to be fitted over the camshaft 3 for assembly to the brake anchor bracket 2.
Referring now to Figures 2 and 3, it will be seen the profile of the dust cover in accordance with the present invention is, necessarily, similar to the prior art dust cover. A main portion 12, as illustrated, has an inner periphery 12 which can fit over the axle beam and an opening 121 extends from the inner periphery to the extremities of an outer periphery 12m and is sufficiently wide to allow servicing access to the camshaft bearing at the brake anchor bracket, for example as 2 on Figure 1 or as described and claimed in our prior British Patent No. EP 0504238.
Main portion 12 has two radially extending slots 13 and holes 14, 15 and 16. Holes 15 register with corresponding tapped holes in the brake anchor bracket to receive screws to secure the main portion to the anchor bracket.
Figures 4 to 7 illustrate a minor portion 17 of the dust cover having an opening 18 which, in this case, is designed to fit over a housing portion of a camshaft bearing secured to an anchor bracket. Two pins 19
are mounted on the minor portion 17 to be received in the holes 16 in the main portion 12 and holes 21 are provided to register with holes 14 of the main portion for securing the minor portion to the main portion. The pins 19 may be screw threaded to receive nuts to secure aadditionslall the minor portion to the main portion. The minor portion 17 may have holes, asl5 in hemain portion, to register with tapped holes in the brake anchor bracket so as to secure the minor portion to the brake anchor bracket.
The opening 18 in the minor portion 17 allows access to the camshaft bearing securing screws. Following removal of the camshaft, for example after removal of the brake drum, the camshaft bearing can be released and removed via the opening 18 without disturbing the dust cover.
The minor portion 17 can be released from the main portion 12 to allow removal of the camshaft and bearing assembly, as described in E.P. 0504238
The dust cover of this embodiment has been described with reference to a round section axle beam but it could be adapted to be used with a square section axle beam.
Claims
1. A brake dust cover characterised in that it comprises a main portion (12) having an inner periphery (12 ) which in use extends around about half an axle beam, an outer periphery (12 ) which extends to opposed extremities which are separated by an arc of no more than 90 degrees centred on the axis of the axle beam, and an opening (12 ) provided between the corresponding ends of the inner periphery (12 ) and the opposed extremities, and a minor portion (17) adapted to overlap and bridge the opening (1211) and be secured to the main portion (12) , the minor portion (17) conforming to the profile of the main portion (12) where it overlaps and having an opening (18) to receive a camshaft, the arrangement being such that when the camshaft has been removed a bearing assembly for the camshaft secured to a brake anchor bracket can be released and withdrawn through the opening (18) in the minor portion (17) without disturbing the dust cover.
2. A brake dust cover as claimed in claim 1 characterised in that the sides of the opening (12 ) provided in the main portion (12) are substantially parallel.
3. A brake dust cover as claimed in claim 1 or claim 2 characterised in that pins or like protrusions (19) on one portion (17) engage in corresponding holes or recesses (16) in the other portion (12) to locate one portion with respect to the other.
4. A brake dust cover as claimed in claim 3 characterised in that there are two of said pins or like protrusions (19) provided on the minor portion (17) to engage in corresponding holes or recesses (16) in the main portion (12) .
5. A brake dust cover as claimed in claim 3 or claim 4 characterised in that the pins or like protrusions (19) are adapted to provide a fastening to secure the two portions (12, 17) of the dust cover together.
6. A brake dust cover as claimed in claim 5 characterised in that the pins or like protrusions (10) are screw threaded to receive nuts to secure the two portions (12, 17) of the dust cover together.
7. A brake dust cover as claimed in any preceding claim characterised in that the main portion (12) is adapted to be secured to a brake anchor bracket and the minor portion (17) is secured to the main portion (12).
8. A brake dust cover as claimed in claim 7 characterised in that the minor portion (17) is adapted to be secured to a brake anchor bracket.
9. An axle assembly characterised in that it includes a dust cover as claimed in any preceding claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU57746/98A AU5774698A (en) | 1997-01-30 | 1998-01-28 | Brake dust covers |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9701903.8 | 1997-01-30 | ||
| GBGB9701903.8A GB9701903D0 (en) | 1997-01-30 | 1997-01-30 | Brake dust covers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1998034040A1 true WO1998034040A1 (en) | 1998-08-06 |
Family
ID=10806821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/GB1998/000264 Ceased WO1998034040A1 (en) | 1997-01-30 | 1998-01-28 | Brake dust covers |
Country Status (4)
| Country | Link |
|---|---|
| AU (1) | AU5774698A (en) |
| GB (2) | GB9701903D0 (en) |
| WO (1) | WO1998034040A1 (en) |
| ZA (1) | ZA98750B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007076986A1 (en) | 2005-12-23 | 2007-07-12 | Kabelschlepp Gmbh | Chain link having a multi-axis link joint |
| DE202008008358U1 (en) | 2008-06-24 | 2008-08-21 | Kabelschlepp Gmbh | Chain link with swivel crossbar |
| US7634900B2 (en) | 2003-10-08 | 2009-12-22 | Kabelschlepp Gmbh | Link plate, chain link, energy guiding chain, and intermediate piece for an energy guiding chain, provided with locking means coupled by torsion for connecting a flight to a link plate |
| DE102008060466A1 (en) | 2008-12-05 | 2010-06-10 | Kabelschlepp Gmbh | Chain link for energy transmission chain for guiding cables and hoses between stationary and movable connection points, has transverse bar consisting of plastic that is guided by die in continuous manufacturing process of transverse bar |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2971731B1 (en) * | 2011-02-18 | 2013-03-15 | Gourdon Freres | TRAILER AXLE INCORPORATING MOTOR ASSISTANCE AND COMPACT BRAKING SYSTEM |
| CN106195265B (en) * | 2016-08-31 | 2018-02-09 | 中国铁道科学研究院 | The brake unit of dust cover and rail traffic vehicles |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2284357A (en) * | 1940-01-19 | 1942-05-26 | Charles S Ash | Dual wheeled vehicle |
| US4164273A (en) * | 1977-10-27 | 1979-08-14 | Enon Valley Industries, Inc. | Resilient shield for vehicle wheel brake assemblies |
| WO1991009235A1 (en) * | 1989-12-07 | 1991-06-27 | Rubery Owen-Rockwell Limited | Vehicle axle beam and brake assembly |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB871737A (en) * | 1956-10-10 | 1961-06-28 | Massey Ferguson Ltd | Improvements in or relating to sealing means for vehicle brakes |
-
1997
- 1997-01-30 GB GBGB9701903.8A patent/GB9701903D0/en active Pending
-
1998
- 1998-01-28 WO PCT/GB1998/000264 patent/WO1998034040A1/en not_active Ceased
- 1998-01-28 GB GB9801678A patent/GB2321680B/en not_active Expired - Fee Related
- 1998-01-28 AU AU57746/98A patent/AU5774698A/en not_active Abandoned
- 1998-01-29 ZA ZA98750A patent/ZA98750B/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2284357A (en) * | 1940-01-19 | 1942-05-26 | Charles S Ash | Dual wheeled vehicle |
| US4164273A (en) * | 1977-10-27 | 1979-08-14 | Enon Valley Industries, Inc. | Resilient shield for vehicle wheel brake assemblies |
| WO1991009235A1 (en) * | 1989-12-07 | 1991-06-27 | Rubery Owen-Rockwell Limited | Vehicle axle beam and brake assembly |
| EP0504238A1 (en) * | 1989-12-07 | 1992-09-23 | Rubery Owen Rockwell Ltd | Vehicle axle beam and brake assembly. |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7634900B2 (en) | 2003-10-08 | 2009-12-22 | Kabelschlepp Gmbh | Link plate, chain link, energy guiding chain, and intermediate piece for an energy guiding chain, provided with locking means coupled by torsion for connecting a flight to a link plate |
| WO2007076986A1 (en) | 2005-12-23 | 2007-07-12 | Kabelschlepp Gmbh | Chain link having a multi-axis link joint |
| US8196384B2 (en) | 2005-12-23 | 2012-06-12 | Tsubaki Kabelschlepp GmbH | Chain link having a multi-axis link joint |
| DE202008008358U1 (en) | 2008-06-24 | 2008-08-21 | Kabelschlepp Gmbh | Chain link with swivel crossbar |
| DE102008060466A1 (en) | 2008-12-05 | 2010-06-10 | Kabelschlepp Gmbh | Chain link for energy transmission chain for guiding cables and hoses between stationary and movable connection points, has transverse bar consisting of plastic that is guided by die in continuous manufacturing process of transverse bar |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA98750B (en) | 1998-07-28 |
| AU5774698A (en) | 1998-08-25 |
| GB9801678D0 (en) | 1998-03-25 |
| GB2321680A (en) | 1998-08-05 |
| GB9701903D0 (en) | 1997-03-19 |
| GB2321680B (en) | 2000-08-16 |
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