Assembly including face seal sized to interference fit in housing
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16J-015/34
F16J-015/32
F16F-001/34
F16F-001/02
출원번호
US-0058266
(2005-02-15)
등록번호
US-7370865
(2008-05-13)
발명자
/ 주소
Vik,Brian D.
Gregor,Brian L.
출원인 / 주소
CNH America LLC
대리인 / 주소
Sheldrake,Patrick M.
인용정보
피인용 횟수 :
10인용 특허 :
7
초록▼
An assembly for a tracked vehicle includes a wheel defining a wheel cavity and a face seal including a rigid sealing ring and a flexible ring disposed on the sealing ring, the flexible ring having an outermost substantially cylindrical surface defining a maximum diameter of the ring. The flexible ri
An assembly for a tracked vehicle includes a wheel defining a wheel cavity and a face seal including a rigid sealing ring and a flexible ring disposed on the sealing ring, the flexible ring having an outermost substantially cylindrical surface defining a maximum diameter of the ring. The flexible ring sized so that the maximum diameter is slightly larger than the wheel cavity.
대표청구항▼
We claim: 1. An assembly comprising: a wheel defining a wheel cavity defined by an inner cylindrical wall having a predetermined diameter; and a face seal including a rigid sealing ring and a flexible ring disposed on the sealing ring, the flexible ring having a trapezoidal shape and including an o
We claim: 1. An assembly comprising: a wheel defining a wheel cavity defined by an inner cylindrical wall having a predetermined diameter; and a face seal including a rigid sealing ring and a flexible ring disposed on the sealing ring, the flexible ring having a trapezoidal shape and including an outermost substantially cylindrical surface defining a maximum diameter of the ring, the flexible ring sized so that in a relaxed state outside of the wheel cavity the maximum diameter of the flexible ring is slightly larger than the diameter of the wheel cavity, wherein the face seal is retained within the wheel cavity, by an interference fit of the flexible ring against the inner cylindrical wall defining the wheel cavity, the interference fit having been achieved by application of a force against only an outer edge of the flexible ring adjacent to the outermost substantially cylindrical surface and substantially evenly therearound in an axial direction toward the wheel cavity, such that the diameter of the ring was reduced so as to be equal to or less than the diameter of the inner cylindrical wall to allow the flexible ring to be inserted into the wheel cavity, and removal of the force. 2. The assembly of claim 1, further comprising a shaft assembly and an opposing face seal, the face seal and opposing face seal being in opposed, face-to-face relation, the shaft assembly including a retainer defining a retainer cavity, the retainer being disposed generally in opposition to the wheel, the opposing face seal including a flexible opposing-ring having an outermost cylindrical surface defining an opposing-ring maximum diameter of the opposing-ring, the opposing-ring maximum diameter sized to be slightly larger than the retainer cavity prior to insertion into the retainer cavity, wherein the opposing face seal is disposed within the retainer cavity whereby the opposing face seal is interference fit into the retainer cavity. 3. A track assembly for a tracked vehicle, the track assembly comprising: a wheel including a hub, the hub defining a hole and a bore, the hole extending through the wheel and the bore being disposed at one end of the hole; a shaft disposed in the hole whereby the wheel is rotatably supported by the shaft; a track supported by the wheel; a retainer disposed in opposing relation to the bore, the retainer defining a cavity; and at least two opposed face seals disposed in a space defined by the retainer and the hub of the wheel, each face seal including a flexible supporting ring having a trapezoidal shape and a rigid sealing ring, the supporting ring having opposed left and right surfaces defining opposed inner and outer surfaces in a radially spaced relationship, the outer surface being substantially smooth from the left to the right surfaces and defining a diameter of the flexible ring, the diameter of each supporting ring prior to installation being larger than one of the bore and cavity such that installation of the supporting ring is an interference fit achieved by application of a force only against an outer edge of the supporting ring adjacent to the outer surface thereof and substantially evenly therearound in a direction for pressing the ring into the bore or the cavity, respectively, such that the diameter of the ring was reduced so as to be equal to or less than the diameter of the bore or the cavity as the ring was inserted therein, and then the force was removed such that the interference fit exists; wherein the outer surface of each supporting ring abuts and forms an interference fit with at least one of (i) a surface of the wheel defining the bore and (ii) a surface defining the cavity of the retainer. 4. The track assembly of claim 3, wherein the supporting ring is elastomeric with an ASTM D 395 200�� C./22 hr compression set of about 30% or less. 5. The track assembly of claim 3, wherein the supporting ring is elastomeric with an ASTM D 395 200�� C./22 hr compression set of about 20% or less. 6. The track assembly of claim 3, wherein the supporting ring is elastomeric with an ASTM D1329 TR10 low temperature retraction of-20�� C. or less. 7. The track assembly of claim 3, wherein the supporting ring is elastomeric with an ASTM D1329 TR10 low temperature retraction of-10�� C. or lower. 8. The track assembly of claim 3, wherein, the sealing ring and supporting ring are concentric. 9. The track assembly of claim 8, wherein the sealing ring is an iron alloy and the supporting ring is an elastomer. 10. A process for installing a face seal in a wheel cavity, comprising steps of: providing a wheel mounted for rotation on a shaft assembly, the wheel defining a wheel cavity; providing a face seal including a rigid sealing ring and a flexible ring disposed on the sealing ring, the flexible ring having opposed left and right surfaces extending between opposed inner and outer surfaces, the outer surface being substantially featureless from the left to the right surfaces, the outer surface defining a diameter of the flexible ring, the flexible ring sized such that the diameter is slightly larger than a diameter of an inner surface defining the wheel cavity and larger than a diameter of the rigid sealing ring, such that the flexible ring extends radially outwardly of the rigid sealing ring around the face seal; providing a face seal installation tool having a ring and structure extending radially outwardly thereof adjacent one end thereof, the ring of the tool having an inner diameter greater than the diameter of the rigid sealing ring so as to be positionable concentric therearound with a radial clearance therebetween, the ring of the tool having an outer diameter enabling insertion thereof into the wheel cavity, and the ring of the tool having a seal-engaging surface extending between the inner diameter and the outer diameter; inserting the face seal into the wheel cavity whereby the flexible ring is compressed radially inwardly to fit into the wheel cavity by engaging only the seal-engaging surface of the tool with an outer edge of the flexible ring adjacent to the outer surface thereof and spaced radially outwardly of the rigid sealing ring, and pressing on the tool to apply a force through the tool against only the outer edge of the flexible ring substantially evenly therearound and in an axial direction toward the wheel cavity only, such that the flexible ring is inserted into the wheel cavity without twisting, until the structure of the tool extending radially outwardly of the ring of the tool contacts the wheel around the wheel cavity to position the flexible ring in the wheel cavity; and removing the force, such that an interference fit is formed between the flexible ring and the inner surface defining the wheel cavity, to retain the face seal in the cavity.
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이 특허에 인용된 특허 (7)
Olsson Burton K. (Park Ridge IL), End face seal assemblies.
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