WO1980001505A1 - Joint - Google Patents

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Publication number
WO1980001505A1
WO1980001505A1 PCT/US1979/000026 US7900026W WO8001505A1 WO 1980001505 A1 WO1980001505 A1 WO 1980001505A1 US 7900026 W US7900026 W US 7900026W WO 8001505 A1 WO8001505 A1 WO 8001505A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal
leg
set forth
end portion
sealing surface
Prior art date
Application number
PCT/US1979/000026
Other languages
English (en)
Inventor
J Blaha
Original Assignee
Towmotor Corp
J Blaha
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 Towmotor Corp, J Blaha filed Critical Towmotor Corp
Priority to PCT/US1979/000026 priority Critical patent/WO1980001505A1/fr
Priority to US06/012,162 priority patent/US4243234A/en
Priority to US06/236,953 priority patent/USRE31314E/en
Priority to ES487793A priority patent/ES487793A0/es
Publication of WO1980001505A1 publication Critical patent/WO1980001505A1/fr
Priority to EP79901053A priority patent/EP0023201A1/fr

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
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/10—Drums for externally- or internally-engaging 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3436—Pressing means
    • F16J15/3456—Pressing means without external means for pressing the ring against the face, e.g. slip-ring with a resilient lip
    • 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
    • F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like

Definitions

  • the invention relates to a seal and a seal assembly in which the seal is positioned at a location sufficient for sealing an annular opening between first and second members rotatable one relative to the other. More particularly, the invention relates to a seal having first and second legs each having a sealing surface in contact with a respective one of a face and an outer surface of the second member.
  • U.S. Patent 4,043,620 which issued to Otto on August 23, 1977, shows embodiments of seals used to seal an annular opening between a shaft and bearing supported housing.
  • U.S. Patent 3,687,464 which issued on August 29, 1972, to Jackson et al shows an embodi ment of a seal used to seal between surfaces of a shaft and related perpendicular abutment.
  • a brake assembly in a lift truck, generally has a backing plate connected to an axle housing.
  • a wheel of the lift truck mounts to a hub which is rotatably connected to an axle tube.
  • the hub includes a brake drum portion.
  • Brake shoes controllably ride against the brake drum portion to slow or stop rotation of the wheel relative to the axle tube.
  • the backing plate is provided to prevent foreign matter from entering the drum which can interfere with the operation of brake shoes against the rotating hub.
  • an "annular opening" is necessarily maintained between said hub and backing plate.
  • dirt, rock, or water for example can enter through the annular opening and interfere with brake operation.
  • metal plates have been connected to one of the backing plate and hub and angularly extended over the other of said members to form a baffle or labyrinth against entry of the foreign matter.
  • This type of solution does not create a positive seal between the two surfaces and dirt and water can still enter the brake assembly, especially in the harsh environment of a work vehicle such as a lift truck.
  • seal and seal assembly which provides a positive seal between the surfaces of two members rotatable one relative to the other, such as the backing plate and hub, to substantially block entry of foreign matter therebetween.
  • a seal has a body and first and second legs.
  • the first leg has a sealing surface and is connected to the body and extends outwardly from a first side of the body.
  • the second leg has a sealing surface and is connected to the body and extends outwardly from the first side of the body.
  • the sealing surfaces are oriented generally perpendicular one relative to the other.
  • a seal assembly has first and second members and a body and first and second legs.
  • the second member has an outer surface and a face extending from said outer surface.
  • the first and second members are rotatable one relative to another.
  • the first leg has a sealing surface in sealing, slideable contact with the face of the second member.
  • the second leg has a sealing surface in sealing, slidable contact with the second member radially at the outer surface of said second member.
  • Means is provided for sealably conntecting said body to the first member.
  • the first and second members are, for example, a backing plate and hub of a braking assembly, respectively.
  • Fig. 1 is a diagrammatic cross-sectional view showing an embodiment of the seal assembly of the present invention on a brake assembly
  • Fig. 2 is a diagrammatic enlarged cross-sectional view of a portion of the embodiment of Fig. 1;
  • Fig. 3 is a digrammatic cross sectional view of an embodiment of the seal of the present invention.
  • a seal assembly 10 includes first and second members 12,14 and a seal 16.
  • the first and second members 12,14 are shown, for example, as a backing plate 20 and a hub 22 of a brake assembly 24, respectively.
  • the hub 22 and backing plate 20 are rotatable one relative to the other and define an annular opening 26 between the hub 22 and the backing plate 20, as is best seen in Fig. 2.
  • the hub 22 rotates relative to the backing plate 20.
  • the backing plate 20 is connected to an axle tube 32 which is fixed to an associated work vehicle (not shown).
  • the hub 22 includes a brake drum portion 30 against which brake shoes 33 are controllably operable to slow or stop rotation of the hub 22 relative to the backing plate 20.
  • First means 28 is provided for supporting said hub 22 and backing plate 20 in rotation one relative to the other. Said first means 28 is shown, for example, as a bearing 31 positioned between the hub 22 and the tube
  • the bearing 31 supports the hub 22 relative to the backing plate 20 through the axle tube 32.
  • the seal 16 is positioned at a location sufficient for blocking passage of foreign matter through the annular opening 26 to maintain satisfactory operation of the brake assembly 24.
  • the seal 16 has a body 36 and first and second legs 38,40.
  • the body 36 has first, second, third and fourth sides 42,44,46,48 and first and second end portions 50,52.
  • the first leg 38 is connected to the first end portion 50 of the body 36 and extends outwardly from said first side 42.
  • the second leg 40 has first and second end portions 54,56 and is connected at the first end portion 54 to the second end portion 52 of the body 36. Said leg 40 extends outwardly from the first side 42, preferably generally parallel to said first leg 38.
  • first and second legs 38,40 extend outwardly generally perpendicular from the first side 42 and that said second leg 40 extend a greater distance outwardly from said first side 42 than said first leg 38 extends from the first side 42.
  • Said body 36 and legs 38,40 are preferably of. unitary, elastomeric construction.
  • Each of said legs 38,40 has a sealing surface 58,60 which is contactable with the hub 22 in the installed position of the seal 16 in order to "seal" against said hub 22.
  • the sealing surface 58 of the first leg 38 is positioned on a first end 62 of said leg 38.
  • the sealing surface 60 of the second leg 40 is positioned on the second end portion 56 of the leg 40.
  • said second end portion 56 has a lip 64 extending generally inwardly from said second end portion 56 in a direction D, toward the first end portion 50 of the body 36.
  • the sealing surface 60 is positioned on said lip 64.
  • the sealing surfaces 58,60 are oriented generally perpendicularly one relative to the other.
  • the hub 22 has an outer surface 66, a face 68 and a central axis 70.
  • the outer surface 66 is positioned generally along the axis 70 which is the axis of rotation of the rotatable hub 22.
  • the face 68 extends from said outer surface 66 in a direction toward the central axis 70 to the inner surface 34 of the hub 22. It should be understood that the backing plate 20 can be rotatable without departing from the invention.
  • Second means 72 hereinafter described is provided for sealably connecting the body 36 to the backing plate 20 for so positioning said body 36.
  • the sealing surfaces 58,60 of the first and second legs 38,40 are in sealing, slidable contact with the face 68 and outer surface 66 of the hub 22, respectively.
  • the sealing surface 60 of the second leg 40 contacts said hub 22 radially relative to the central axis 70 at the outer surface 66.
  • a line 74 passing substantially perpendicularly through the sealing surface 60 is also substantially perpendicular to said central axis 70 (Fig. 1).
  • sealing surfaces 58,60 be oriented generally perpendicular or substantially perpendicular one relative to the other as was described with respect to the individual seal 16. It is desirable that said sealing surfaces 58,60 urge against the face 68 and outer surface 66 of the hub 22, respectively, to promote initial seating of the seal 16 and continued sealing despite wear on the sealing surfaces 58,60.
  • the face 68 of the hub 22 has an annular opening 76 having sidewalls 78 and a bottom surface 80.
  • the first leg 38 of the seal 16 extends into said opening 76 preferably at a location spaced from the sidewalls 78 of said opening 76.
  • the sealing surface 58 of the first leg 38 slidably contacts said face 68 of the hub 22 at the bottom surface 80 of said annular opening 76.
  • said first leg 44 forms a labyrinth type seal relative to said hub 22.
  • the first and second legs extend outwardly from the first side 46 of the body 42 to define a generally U-shaped opening 82 with the body 36 of said seal 16.
  • the seal 16 forms a first annular chamber 84 with said hub 22 owing to the configuration of said opening 74.
  • the chamber 84 is defined by the face 68 and outer surface 66 of the hub 22, the first and second legs 38,40 and a first portion 86 of the first side 42 of the body 36 extending between said first and second legs 38,40.
  • Said first portion 86 extends angularly from and relative to said second leg 40 to form an angle A 1 with a side 88 of the second leg 40.
  • the first portion 86 extends angularly from said second leg 40 to a point about midway between the first and second legs 38,40 and generally perpendicularly to said first and second legs 38,40 from said midway point to the first leg 38.
  • the installed seal 16 forms a second annular chamber 90 with the hub 22 and backing plate 20.
  • Said chamber 90 is defined by said hub 22 and backing plate 20, the second means 72, the first leg 38 and an arm portion 92 of the body 36.
  • the second annular chamber 90 is in communication with the annular opening 26 between the hub 22 and backing plate 20.
  • the arm portion 92 of the body 36 extends at substantially right angles to the first leg 38 in a direction D 2 from said first and second legs 38,40.
  • Said arm portion 92 defines the second side 44 of the body 36 oriented generally parallel to the first leg 38 and a second portion 94 of the first side 42 of the body 36.
  • the seal 16 has a fastening element 96 having first and second portions 98,100.
  • the second means 72 for sealably connecting said seal 16 to the backing plate 20 includes a mounting element 102 removably connectable to said fastening element 96. and the backing plate 20.
  • said mounting element 102 is positioned about and connected to the backing plate 20 by cap screws, rivets 104 or the like to act as a shield preventing entry of foreign matter between the seal 16 and backing plate 20 and protecting the seal 16 from damage.
  • First and second shield portions 106,108 of said mounting element 102 protect the third side 46 of the body 36, and the fourth side 48 of the body 36 and the second leg 40, respectively.
  • the first portion 98 is an annular ring 110 positioned in or molded into and positioned along said body 36.
  • the second portion 100 of the fastening element 96 shown as a plurality of flanges 112, extends outwardly from the third side 46 of the body 36 and is removably connected to the mounting element 102.
  • the flanges 112 each extend through one of a plurality of openings 114 in the mounting element 102.
  • a plurality of nuts 116 each threadably engage one of the flanges 112 to connect the fastening and mounting elements 96,102.
  • the first portion 98 of the fastening element 96 can also be, for example, individual anchors molded into the body 36 and connected to respective flanges 112.
  • the mounting element 102 In position on the seal assembly 10, the mounting element 102 extends from contact with an outer surface 118 of the backing plate 20 into contact at the first shield portion 106 with the third side 46 of the body 36 to sealably connect the seal 16 to the backing plate 20.
  • the second shield portion 108 extends at generally right angles to the first shield portion 106 along and adjacent the second leg 40.
  • seal 16 and seal assembly 10 can be of other configurations as is known in the art without departing from the invention.
  • the hub 22 rotates relative to the backing plate 20.
  • the sealing surfaces 58,60 "seal" against the hub 22 to substantially block entry of foreign material through the annular opening 76 into the brake shoes 30 and drum 26.
  • the seal 16 is preferably of abrasion resistant rubber to withstand the working environment of, for example, a work vehicle (not shown) associated with the brake, assembly 24. Installation of the seal 16 is done with the hub 22 removed.
  • the mounting element 102 is- first connected to the backing plate 20.
  • the seal 16 is passed over the brake shoes 33 and the flanges 112 inserted in the respective openings 114 in the mounting element 102.
  • the nuts 116 are partially threadably engaged on the flanges 112 to loosely secure the seal 16 to the mounting element 102.
  • the hub 22 Prior to tightening the nuts 116, the hub 22 is mounted on the brake drum 30 and directed into position relative to the seal 16.
  • the angled first portion 86 of the first side 42 of the body 36 tends to center said seal 16 relative to the hub 22 by contacting the hub 22 and moving the seal 16 along the face 68 of the hub 22.
  • the seal 16 is self centering in response to rotating said hub 22.
  • the second leg 40 positions or self centers the seal 16 owing to the radial contact of the second sealing surface 60 with the outer surface 66 of the hub 22.
  • the nuts 116 are finally tightened to effectively position the seal 16 and protect the brake drum 30.
  • the seal 16 tends to accommodate eccentricity of the rotating hub 22 relative to the backing plate 20 owing to the flexibility of the second leg 40 and the spaced relationship of the first leg 38 and the sidewalls 78 of the annular opening 76. Where the sealing surfaces 58,60 urge against the face 68 and outer surface 66 respectively, the seal 16 will gradually seat against the hub 22, particularly with respect to the sealing surface 56 of the first leg 38. Also, wear of the sealing surface 58 of the first leg 38 tends to move the second leg 40 along the outer surface 66 of the hub 22 to maintain the seal along said outer surface 66.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)

Abstract

Un joint (16) est place pour prevenir l'entree de matieres etrangeres au travers d'une ouverture annulaire entre une premiere et une seconde piece (12, 14). Ces premiere et seconde pieces (12, 4) sont, par exemple, une plaque de renforcement stationnaire (20) et un moyeu rotatif (22) d'un dispositif de freinage (24) ou un axe rotatif et les elements associes de bati. Des matieres etrangeres passant entre la plaque de renforcement (20) et le moyeu (22), par exemple, peuvent penetrer dans un tambour de frein associe (30) et porter atteinte a l'efficacite du freinage (24). Un dispositif (72) relie le joint (16) avec la plaque de renforcement (20). Le joint possede des premieres et secondes levres (38, 40) chacune presentant une surface d'obturation (58, 60). Les surfaces d'obturation sont en contact avec une face (68) et une surface externe (66) du moyeu (22), respectivement, pour bloquer le passage des matieres etrangeres vers le tambour de frein (30).
PCT/US1979/000026 1979-01-18 1979-01-18 Joint WO1980001505A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PCT/US1979/000026 WO1980001505A1 (fr) 1979-01-18 1979-01-18 Joint
US06/012,162 US4243234A (en) 1979-01-18 1979-01-18 Seal and seal assembly
US06/236,953 USRE31314E (en) 1979-01-18 1979-01-18 Brake drum seal with dual elastomeric legs
ES487793A ES487793A0 (es) 1979-01-18 1980-01-17 Perfeccionamientos en conjuntos obturadores para obturar una abertura anular entre un primer y un segundo elementos con movimiento de rotacion entre si
EP79901053A EP0023201A1 (fr) 1979-01-18 1980-07-29 Joint

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/US1979/000026 WO1980001505A1 (fr) 1979-01-18 1979-01-18 Joint
WOUS79/00026 1979-01-18

Publications (1)

Publication Number Publication Date
WO1980001505A1 true WO1980001505A1 (fr) 1980-07-24

Family

ID=22147488

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1979/000026 WO1980001505A1 (fr) 1979-01-18 1979-01-18 Joint

Country Status (2)

Country Link
EP (1) EP0023201A1 (fr)
WO (1) WO1980001505A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0124419A1 (fr) * 1983-05-02 1984-11-07 Allied Corporation Assemblage plateau-support pour un frein à tambour

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1003674B (de) * 1955-06-30 1957-03-07 Dowty Seals Ltd Abdichtungsvorrichtung, insbesondere fuer hydraulisch betaetigte Grubenstempel
FR1139430A (fr) * 1954-12-10 1957-07-01 Eickhoff Geb Joint d'étanchéité pour paliers
US3006701A (en) * 1958-06-17 1961-10-31 Timken Roller Bearing Co Seal
US3438639A (en) * 1965-03-30 1969-04-15 Luxembourg Brev Participations Packing devices for rotating shafts
US3447848A (en) * 1965-06-24 1969-06-03 Nadella Journal rolling bearing having a built-in sealing element
US3533491A (en) * 1968-03-20 1970-10-13 Rockwell Standard Co Brake with lining wear indicator
US3614183A (en) * 1970-02-19 1971-10-19 Federal Mogul Corp Shaft seal with expandable outer periphery
US3614113A (en) * 1970-03-04 1971-10-19 Caterpillar Tractor Co Boot-belleville seal
US3841723A (en) * 1973-05-22 1974-10-15 Gen Motors Corp Railway bearing seal
GB1424192A (en) * 1972-03-06 1976-02-11 Automotive Prod Co Ltd Motor vehicle wheel axle and brake support assemblies and to internal shoe drum brake back plates
US3998297A (en) * 1975-04-10 1976-12-21 Tokico Ltd. Brake shoe clearance automatic adjusting device
US4021085A (en) * 1975-11-06 1977-05-03 Ford Motor Company Universal joint seal
US4058322A (en) * 1975-06-12 1977-11-15 Intertrac Viehmann & Co. Bearing seal for endless tracks

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR48670E (fr) * 1937-01-21 1938-05-23 Perfectionnements à des organes de fermeture pour des tambours de frein
US2198944A (en) * 1938-08-03 1940-04-30 Clarence M Mikkelson Safety brake seal
DE740628C (de) * 1940-11-29 1943-10-25 Georg Seiler Dipl Ing Abdichtung fuer Bremsen, insbesondere Kraftfahrzeugbremsen
FR1418043A (fr) * 1964-06-04 1965-11-19 Dana Corp Perfectionnement à un procédé d'assemblage d'un organe d'étanchéité et d'une bague de palier en forme de cuvette sur un tourillon et joint d'étanchéité ainsi constitué

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1139430A (fr) * 1954-12-10 1957-07-01 Eickhoff Geb Joint d'étanchéité pour paliers
DE1003674B (de) * 1955-06-30 1957-03-07 Dowty Seals Ltd Abdichtungsvorrichtung, insbesondere fuer hydraulisch betaetigte Grubenstempel
US3006701A (en) * 1958-06-17 1961-10-31 Timken Roller Bearing Co Seal
US3438639A (en) * 1965-03-30 1969-04-15 Luxembourg Brev Participations Packing devices for rotating shafts
US3447848A (en) * 1965-06-24 1969-06-03 Nadella Journal rolling bearing having a built-in sealing element
US3533491A (en) * 1968-03-20 1970-10-13 Rockwell Standard Co Brake with lining wear indicator
US3614183A (en) * 1970-02-19 1971-10-19 Federal Mogul Corp Shaft seal with expandable outer periphery
US3614113A (en) * 1970-03-04 1971-10-19 Caterpillar Tractor Co Boot-belleville seal
GB1424192A (en) * 1972-03-06 1976-02-11 Automotive Prod Co Ltd Motor vehicle wheel axle and brake support assemblies and to internal shoe drum brake back plates
US3841723A (en) * 1973-05-22 1974-10-15 Gen Motors Corp Railway bearing seal
US3998297A (en) * 1975-04-10 1976-12-21 Tokico Ltd. Brake shoe clearance automatic adjusting device
US4058322A (en) * 1975-06-12 1977-11-15 Intertrac Viehmann & Co. Bearing seal for endless tracks
US4021085A (en) * 1975-11-06 1977-05-03 Ford Motor Company Universal joint seal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0023201A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0124419A1 (fr) * 1983-05-02 1984-11-07 Allied Corporation Assemblage plateau-support pour un frein à tambour

Also Published As

Publication number Publication date
EP0023201A4 (fr) 1980-12-12
EP0023201A1 (fr) 1981-02-04

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