WO2001013015A1 - Ensemble joint a ressort belleville encapsule dans un cercle de charge - Google Patents

Ensemble joint a ressort belleville encapsule dans un cercle de charge Download PDF

Info

Publication number
WO2001013015A1
WO2001013015A1 PCT/US2000/020596 US0020596W WO0113015A1 WO 2001013015 A1 WO2001013015 A1 WO 2001013015A1 US 0020596 W US0020596 W US 0020596W WO 0113015 A1 WO0113015 A1 WO 0113015A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal
seal assembly
seal member
wall
counterbore
Prior art date
Application number
PCT/US2000/020596
Other languages
English (en)
Inventor
David G. Kupper
Original Assignee
Caterpillar Inc.
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 Caterpillar Inc. filed Critical Caterpillar Inc.
Priority to EP00952258A priority Critical patent/EP1121547A1/fr
Priority to KR1020017004757A priority patent/KR20010080178A/ko
Priority to JP2001517076A priority patent/JP2003507673A/ja
Publication of WO2001013015A1 publication Critical patent/WO2001013015A1/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
    • 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
    • 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
    • F16J15/344—Pressing means the pressing force being applied by means of an elastic ring supporting the slip-ring

Definitions

  • This invention relates generally to a seal assembly, and more particularly to a seal assembly having a cone spring encapsulated within a load ring component of the seal assembly.
  • the sealing element containing the Belleville spring, is attached to one end of a support spring which has an opposite end pressed into an annular groove formed in the radial wall of a counterbore in which the seal assembly is positioned.
  • the seal assembly described by Roley requires a relatively deep counterbore to support the sealing element with a cantilevered spring supported Belleville spring, in addition to requiring a deep groove machined into the flat radial face of the counterbore to support one end of the cantilevered spring.
  • the present invention is directed to overcoming the problems set forth above. It is desirable to have a seal assembly in which a Belleville spring advantageously provides improved sealing performance as a result of being encased in a load ring that applies a consistent load to the sealing component of the seal assembly.
  • seal assembly which only requires a relatively shallow counterbore thereby allowing more engagement area between the member in which the counterbore is formed and a pin pressed into the counterbored member. It is also desirable to have such a seal assembly that does not require an annular cantilevered spring retained within a groove in the base of the counterbore.
  • a seal assembly for sealing a joint between two coaxially mounted members mounted on a pin or elongated cylindrical member (16) , in which the two members are rotatably movable with respect to each other about the longitudinal axis of the pin and have a variable space extending axially between opposed radial faces of the two members, includes a seal member and a load ring.
  • the seal assembly is mountable in a counterbore provided in a preselected one of the two members.
  • the counterbore is defined by a cylindrical circumferential wall and a recessed radial wall extending radially inwardly from the cylindrical circumferential wall .
  • the seal member component of the seal assembly has a support portion and a resilient seal portion.
  • the resilient seal portion is adapted to be disposed in contacting relationship with an opposed radial face of the non-preselected one of the two members.
  • the support portion of the seal member has a face adapted to support the resilient seal portion and a mounting surface that is spaced from the face.
  • the load ring component of the seal assembly has a frustoconical Belleville spring completely encapsulated within a plastic annular housing.
  • the annular housing has an outer cylindrical wall adapted to be forcedly received within the cylindrical circumferential wall of the counterbore formed in the radial face of the preselected member.
  • the load ring also includes a seal member support surface spaced from the outer circumferential wall that is adapted to forcedly abut the mounting surface of the support portion of the seal member and retain the seal member in fixed relationship with the load ring.
  • At least a central portion of the encapsulated frustoconical Belleville spring is disposed between the mounting surface of the support section of the seal member and the recessed radial wall of the counterbore. The encapsulated Belleville spring thereby urges the seal member in a direction away from the recessed radial wall of the counterbore and the resilient seal portion of the seal member into biased contact with the opposed radial face when the joint is assembled.
  • the support section of the seal member being an annular ring and the mounting surface of the support section having a compound curved surface comprising a radially disposed wall portion, a circumferentially disposed wall portion, and a concave curved portion extending between the radially disposed wall portion and the circumferentially disposed wall portion.
  • the mating seal member support surface of the annular ring of the load ring has a compound curved surface comprising a radially disposed wall portion, a circumferentially disposed wall portion, and a convex curved portion extending between the radially disposed wall portion and the circumferentially disposed wall portion.
  • seal assembly embodying the present invention includes the support section of the seal member being formed of a plastic material such as an inj ection-moldable polycarbonate. Yet another feature of the seal assembly includes the resilient seal portion of the seal member being formed of polyurethane material having a Shore D hardness from about 40 to about 50. Yet another feature of the seal assembly embodying the present invention includes the plastic annular housing in which the Belleville spring is embedded being formed of an inj ection-moldable polyurethane material having a Shore D hardness from about 40 to about 50.
  • Fig. 1 is a fragmentary diametric section of a track pin joint having the seal assembly embodying the present invention disposed therein;
  • Fig. 2 is a fragmentary enlarged section of the seal assembly embodying the present invention
  • Fig. 3 is a fragmentary three-dimensional view of the load ring component of the seal assembly embodying the present invention showing the load ring in its free state prior to assembly in a joint.
  • FIG. 10 An illustrated embodiment of a seal assembly embodying the present invention is generally designated by the reference numeral 10 in Figs. 1 and 2 of the drawings.
  • the seal assembly 10 is advantageously used to seal the variable space between a first joint member 12 and a second joint member 14, which have relative movement toward and from each other so as to have variable spacing therebetween during operation.
  • the first joint member 12 comprises a portion of a first track link
  • the second joint member 14 comprises a bushing that is rotatably mounted on a track pin 16 and is received in a portion of a second track link 18.
  • the track pin 16 is pressed into a bore 22 of the first track link 12, thereby prohibiting relative movement between the first track link 12 and the track pin 16.
  • the first joint member 12 further has a counterbore defined by a cylindrical circumferential wall 24 and a recessed radial wall 26 extending radially inwardly from the cylindrical circumferential wall 24. Movement of the first joint member 12 and the second joint member 14 toward each other is limited by a thrust ring 20.
  • the seal assembly 10 includes a seal member 28 and a load ring 30.
  • the seal member 28 has a support portion 32 and a resilient seal, or lip, portion 34.
  • the resilient seal portion 34 is adapted to be disposed in contacting relationship with the opposed radial face of the second joint member 14 when the joint is assembled.
  • the support portion 32 of the seal member 28 has a face 36 adapted to support the resilient seal portion 34, and a mounting surface 38 spaced from the face 36.
  • the resilient seal, or lip, portion 34 is formed of a relatively soft, compliant material such as polyurethane, having a Shore D hardness of from about 40 to about 50.
  • the support portion 32 of the seal member 27 is formed of a relatively harder material, such as an inj ection- moldable polycarbonate.
  • the resilient seal portion 34 may be preformed and insert molded into the support section 32, or injection molded in a two-stage mold with the support portion 32.
  • Fig. 2 generally has an annular ring shape with the face 36 disposed on one radial face of the ring and the mounting surface 38 generally disposed on rear radial surfaces of the ring.
  • the mounting surface 38 is generally defined by a compound curved surface having a radially disposed wall portion 40, a circumferentially disposed wall portion 42, and a concave curved portion 44 extending between the radially disposed wall portion 40 and the circumferentially disposed wall portion 42.
  • the load ring 30 has a frustoconical Belleville spring 50 completely encapsulated within a plastic annular housing, or ring, 52.
  • Belleville springs often called dish, conical springs, or washers, occupy a very small space and are stressed in a manner such that they provide unusually high spring rates.
  • the Belleville spring 50 provides a bias force that is transmitted through the load ring 30 to the seal member 30 and thence to the resilient seal portion 34 to maintain the resilient seal portion 34 in biased contact with the opposed face of the second joint member 14.
  • the load ring 30 with the Belleville spring 50 encapsulated therein is displaced outwardly at its center such that when it is assembled in the joint assembly, the center portion is compressed toward the recessed radial wall 26 of the counterbore.
  • the compression provides a bias force urging the seal member 34 into contact with the radial face of the second joint member 14.
  • the annular plastic housing 52 encapsulating the
  • Belleville spring 50 is preferably formed of an inj ection-moldable polyurethane material having a Shore D hardness from about 40 to about 50. Desirably, the Belleville spring is encapsulated, in its free state, within the plastic housing 52 by insert molding.
  • the annular plastic ring 52 has an outer cylindrical wall 54 having a diameter slightly greater than the diameter of the cylindrical circumferential wall 24 of the counterbore so that the respective circumferential walls 24, 54, forcedly abut each other as a result of an interference fit between the respective walls.
  • the cylindrical circumferential wall 24 of the counterbore has a diameter of 92.3mm and the outer circumferential wall 54 of the load ring 30 has a diameter of 93.8mm, resulting in an interference of about 0.75mm between the outer cylindrical wall 54 of the load ring 30 and the cylindrical circumferential wall 24 of the counterbore. This assures tight retention of the seal assembly 10 within the counterbore of the first joint member 12.
  • the load ring 30 further comprises a seal member support surface 56 that is shaped to mate with the mounting surface 38 of the seal member 28. More specifically, the seal member support surface 26 is spaced from the outer cylindrical wall 54 of the load ring 30 and is adapted to not only mate with, but to forcibly abut the mounting surface 56 of the support section 32 of the seal member 28.
  • the seal member support surface 56 of the load ring 30 has a compound curve shape comprising a radially disposed wall portion 58, a circumferentially disposed wall portion 60, and a convex curved portion 62 extending between the radially disposed wall portion 58 and the circumferentially disposed wall portion 60.
  • the seal member support surface 56 is adapted to forcedly abut the mounting surface 38 of the support portion 32 of the seal member 28.
  • the forced abutment between the respective surfaces 56, 38 is provided by an interference fit between the circumferentially disposed wall portion 42 of the support portion 32 of the seal member 28 and the circumferentially disposed wall portion 60 of the plastic housing 52 of the load ring 30.
  • the outer diameter of the circumferentially disposed wall portion 42 of the mounting surface 38 has a diameter of about 92.3mm
  • the diameter of the circumferentially disposed wall portion 60 of the seal member support surface 56 has a diameter of about 93.8mm, thereby providing an interference of about 0.75mm between the two members.
  • the seal assembly 10 embodying the present invention provides an improved seal for variably spaced joint members, such as found in track joints.
  • the Belleville spring 50 encapsulated within a plastic housing 52, provides a load ring 30 that urges the seal member 28 axially outwardly from the counterbore of the first joint member 12 into biased contact with the radial face of the second joint member 14, thereby assuring positive, continuously biased, abutment of the resilient seal portion 34 with the opposed face of the second joint member 14.
  • the seal member 10 provides improved sealing performance due to the consistent load provided by the Belleville spring 50. Also, pin retention capability of the link assembly is improved due to the reduced requirement for a deep counterbore in the joint member that nonrotatably receives the common mounting pin. Thus, pin retention capability of the first joint member 12 is improved due to the requirement for the reduced counterbore depth.
  • the reduction in counterbore depth allows more pin engagement surface area with the link 12.

Abstract

L'invention concerne un ensemble joint (10) à ressort Belleville entièrement encapsulé dans un cercle de charge (30) supportant un élément d'étanchéité, qui fournit une force de sollicitation à une partie joint élastique de l'élément d'étanchéité (28) de façon à assurer un contact positif avec une face opposée d'un élément (12, 14) adjacent d'un ensemble joint. Ce dernier (10) nécessite une profondeur de contre-alésage minimale dans l'élément de montage de l'ensemble joint (10), aucune modification n'étant alors requise au niveau du ressort Belleville (50) ou de la base du contre-alésage.
PCT/US2000/020596 1999-08-17 2000-07-28 Ensemble joint a ressort belleville encapsule dans un cercle de charge WO2001013015A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP00952258A EP1121547A1 (fr) 1999-08-17 2000-07-28 Ensemble joint a ressort belleville encapsule dans un cercle de charge
KR1020017004757A KR20010080178A (ko) 1999-08-17 2000-07-28 하중링 내에 캡슐화된 접시 스프링을 갖춘 시일 조립체
JP2001517076A JP2003507673A (ja) 1999-08-17 2000-07-28 皿バネをロードリング内に封入したシールアセンブリ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US37675399A 1999-08-17 1999-08-17
US09/376,753 1999-08-17

Publications (1)

Publication Number Publication Date
WO2001013015A1 true WO2001013015A1 (fr) 2001-02-22

Family

ID=23486332

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/020596 WO2001013015A1 (fr) 1999-08-17 2000-07-28 Ensemble joint a ressort belleville encapsule dans un cercle de charge

Country Status (4)

Country Link
EP (1) EP1121547A1 (fr)
JP (1) JP2003507673A (fr)
KR (1) KR20010080178A (fr)
WO (1) WO2001013015A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004031941A1 (de) * 2004-06-30 2006-01-19 Ab Skf Dichtungsanordnung und Gelenk einer Kette mit der Dichtungsanordnung
CN112443583A (zh) * 2019-09-05 2021-03-05 斯凯孚公司 用于轮毂组件的密封装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013019448A (ja) * 2011-07-09 2013-01-31 Denso Corp バックアップリング

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3269738A (en) * 1961-08-16 1966-08-30 Goetzewerke Glide ring seal for rotary piston motors
US4253713A (en) * 1979-10-22 1981-03-03 Disposable Waste Systems, Inc. High integrity fluid pressure rotary shaft seal
GB1593757A (en) * 1977-10-27 1981-07-22 Caterpillar Tractor Co End face seal assembly
US4392657A (en) 1980-02-19 1983-07-12 Caterpillar Tractor Co. Belleville spring loaded seal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3269738A (en) * 1961-08-16 1966-08-30 Goetzewerke Glide ring seal for rotary piston motors
GB1593757A (en) * 1977-10-27 1981-07-22 Caterpillar Tractor Co End face seal assembly
US4253713A (en) * 1979-10-22 1981-03-03 Disposable Waste Systems, Inc. High integrity fluid pressure rotary shaft seal
US4392657A (en) 1980-02-19 1983-07-12 Caterpillar Tractor Co. Belleville spring loaded seal

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004031941A1 (de) * 2004-06-30 2006-01-19 Ab Skf Dichtungsanordnung und Gelenk einer Kette mit der Dichtungsanordnung
US8485926B2 (en) 2004-06-30 2013-07-16 Ab Skf Sealing arrangement and link of a chain with said sealing arrangement
US9004493B2 (en) 2004-06-30 2015-04-14 Ab Skf Seal arrangement and hinge of a chain with the seal arrangement
CN112443583A (zh) * 2019-09-05 2021-03-05 斯凯孚公司 用于轮毂组件的密封装置

Also Published As

Publication number Publication date
JP2003507673A (ja) 2003-02-25
KR20010080178A (ko) 2001-08-22
EP1121547A1 (fr) 2001-08-08

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