GB2321680A - Brake dust cover - Google Patents

Brake dust cover Download PDF

Info

Publication number
GB2321680A
GB2321680A GB9801678A GB9801678A GB2321680A GB 2321680 A GB2321680 A GB 2321680A GB 9801678 A GB9801678 A GB 9801678A GB 9801678 A GB9801678 A GB 9801678A GB 2321680 A GB2321680 A GB 2321680A
Authority
GB
United Kingdom
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.)
Granted
Application number
GB9801678A
Other versions
GB9801678D0 (en
GB2321680B (en
Inventor
David James Fanning
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.)
Meritor Heavy Vehicle Systems Ltd
Original Assignee
Meritor Heavy Vehicle Systems Ltd
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 Meritor Heavy Vehicle Systems Ltd filed Critical Meritor Heavy Vehicle Systems Ltd
Publication of GB9801678D0 publication Critical patent/GB9801678D0/en
Publication of GB2321680A publication Critical patent/GB2321680A/en
Application granted granted Critical
Publication of GB2321680B publication Critical patent/GB2321680B/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
    • 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

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 shoe 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 12' which extends, in use, around an axle beam, an outer periphery 12''', and an opening 12" which allows 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 12" and is secured to the main portion 12. An opening 18 in the minor portion 17 can receive the 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 comprising 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 121 which can fit over the axle beam and an 11 opening 1211 extends from the inner periphery to the extremities of an outer periphery 12111 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, aslS 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 (10)

1. A brake dust cover comprising a main portion having an inner periphery which in use extends around about half 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.
2. A brake dust cover as claimed in claim 1 wherein the sides of the opening provided in the main portion are substantially parallel.
3. A brake dust cover as claimed in claim 1 or claim 2 wherein pins or like protrusions on one portion engage in corresponding holes or recesses in the other portion to locate one portion with respect to the other.
4. A brake dust cover as claimed in claim 3 wherein there are two of said pins or like protrusions provided on the minor portion to engage in corresponding holes or recesses in the main portion.
5. A brake dust cover as claimed in claim 3 or claim 4 wherein the pins or like protrusions are adapted to provide a fastening to secure the two portions of the dust cover together.
6. A brake dust cover as claimed in claim 5 wherein the pins or like protrusions are screw threaded to receive nuts to secure the two portions of the dust cover together.
7. A brake dust cover as claimed in any preceding claim wherein the main portion is adapted to be secured to a brake anchor bracket and the minor portion is secured to the main portion.
8. A brake dust cover as claimed in claim 7 wherein the minor portion is adapted to be secured to a brake anchor bracket.
9. A brake dust cover substantially as described herein with reference to Figures 2 to 7 of the accompanying drawings.
10. An axle assembly including a dust cover as claimed in any preceding claim.
GB9801678A 1997-01-30 1998-01-28 Brake dust covers Expired - Fee Related GB2321680B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB9701903.8A GB9701903D0 (en) 1997-01-30 1997-01-30 Brake dust covers

Publications (3)

Publication Number Publication Date
GB9801678D0 GB9801678D0 (en) 1998-03-25
GB2321680A true GB2321680A (en) 1998-08-05
GB2321680B GB2321680B (en) 2000-08-16

Family

ID=10806821

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB9701903.8A Pending GB9701903D0 (en) 1997-01-30 1997-01-30 Brake dust covers
GB9801678A Expired - Fee Related GB2321680B (en) 1997-01-30 1998-01-28 Brake dust covers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB9701903.8A Pending GB9701903D0 (en) 1997-01-30 1997-01-30 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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2971731A1 (en) * 2011-02-18 2012-08-24 Gourdon Freres Axle for multi-purpose trailer coupled with tractor moving on e.g. road, has cam support comprising tubular part to guide shaft, and other part provided with connection unit, where parts are connected by dismountable connection

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10346653A1 (en) 2003-10-08 2005-06-09 Kabelschlepp Gmbh Chain link, chain link and energy guiding chain, as well as intermediate piece for an energy guiding chain, with torsion-coupled locking means for connecting crosspiece and link plate
DE102005061777A1 (en) 2005-12-23 2007-06-28 Kabelschlepp Gmbh Chain link for energy transmission chain, has transverse bar and clips arranged at distance to each other, where transverse bar is pin-jointed with one clip, and pin-joint is multi-axis pin-joint and ball-and-socket joint connection
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
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 (1)

* Cited by examiner, † Cited by third party
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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
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
GB8927638D0 (en) * 1989-12-07 1990-02-07 Rubery Owen Rockwell Ltd Brake assemblies

Patent Citations (1)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2971731A1 (en) * 2011-02-18 2012-08-24 Gourdon Freres Axle for multi-purpose trailer coupled with tractor moving on e.g. road, has cam support comprising tubular part to guide shaft, and other part provided with connection unit, where parts are connected by dismountable connection

Also Published As

Publication number Publication date
GB9801678D0 (en) 1998-03-25
GB9701903D0 (en) 1997-03-19
WO1998034040A1 (en) 1998-08-06
GB2321680B (en) 2000-08-16
ZA98750B (en) 1998-07-28
AU5774698A (en) 1998-08-25

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Legal Events

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

Effective date: 20160128