WO2023167103A1 - 密封装置及び密封構造 - Google Patents

密封装置及び密封構造 Download PDF

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Publication number
WO2023167103A1
WO2023167103A1 PCT/JP2023/006759 JP2023006759W WO2023167103A1 WO 2023167103 A1 WO2023167103 A1 WO 2023167103A1 JP 2023006759 W JP2023006759 W JP 2023006759W WO 2023167103 A1 WO2023167103 A1 WO 2023167103A1
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WO
WIPO (PCT)
Prior art keywords
ring
lip
inner ring
outward flange
sealed
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
Application number
PCT/JP2023/006759
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English (en)
French (fr)
Japanese (ja)
Inventor
祐也 坂野
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.)
Nok Corp
Original Assignee
Nok Corp
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 Nok Corp filed Critical Nok Corp
Priority to JP2024504660A priority Critical patent/JPWO2023167103A1/ja
Priority to CN202380015313.1A priority patent/CN118434980A/zh
Priority to US18/717,169 priority patent/US12442418B2/en
Priority to KR1020247019686A priority patent/KR20240101851A/ko
Priority to EP23763362.3A priority patent/EP4488538A4/en
Publication of WO2023167103A1 publication Critical patent/WO2023167103A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • F16J15/44—Free-space packings
    • F16J15/447—Labyrinth packings
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • F16C33/7823—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of sealing 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring
    • F16C33/7883—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring mounted to the inner race and of generally L-shape, the two sealing rings defining a sealing with box-shaped cross-section
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/80—Labyrinth sealings
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/80—Labyrinth sealings
    • F16C33/805—Labyrinth sealings in addition to other sealings, e.g. dirt guards to protect sealings with sealing 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
    • F16J15/32—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
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
    • F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
    • F16J15/3256—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals
    • F16J15/3264—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals the elements being separable from each other
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/187—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with all four raceways integrated on parts other than race rings, e.g. fourth generation hubs
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/90—Surface areas
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/40—Application independent of particular apparatuses related to environment, i.e. operating conditions
    • F16C2300/42—Application independent of particular apparatuses related to environment, i.e. operating conditions corrosive, i.e. with aggressive media or harsh conditions
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

Definitions

  • the present invention relates to a sealing device and a sealing structure.
  • a hub bearing provided in an automobile or the like is provided with a sealing device to prevent foreign matter such as muddy water from entering the bearing and to prevent lubricant such as grease from leaking to the outside.
  • the sealing device is provided to seal an annular gap between the inner ring and the outer ring.
  • the inner ring has a low rust resistance, and if muddy water or the like adheres to the inner ring and rust occurs, the sealing performance decreases.
  • JP 2012-61875 A Japanese Unexamined Patent Application Publication No. 2021-11938
  • the present invention provides a sealing device and a sealing structure that improve the prevention of foreign matter such as muddy water from entering.
  • the present invention employs the following means to solve the above problems.
  • the sealing device of the present invention is A sealing device used in a hub bearing for sealing an annular gap between an inner ring and an outer ring, a slinger having a cylindrical portion attached to the inner ring and an outward flange provided at an end of the cylindrical portion; a seal body attached to the outer ring, the seal body having a reinforcing ring and an elastic sealing portion made of an elastomer material integrally provided with the reinforcing ring;
  • a sealing device comprising: The elastic seal portion is main lip and a side lip extending radially outward and opposite to the space to be sealed and in contact with the outward flange; an intermediate lip provided between the main lip and the side lip, extending radially outward and opposite to the space to be sealed, and in contact with the outward flange portion; with The second annular recess formed along the outer peripheral surface of the side lip is closer to the central axis of the inner ring than the first annular recess formed between the side lip and the intermediate lip. It is
  • the depth of the second annular recess formed along the outer peripheral surface of the side lip is deep, the capacity for holding foreign matter such as muddy water is increased on the outer peripheral surface side of the side lip. can do. As a result, foreign matter such as muddy water can be prevented from entering toward the intermediate lip and the main lip.
  • the reinforcing ring has a reinforcing ring cylindrical portion fitted to the inner peripheral surface of the outer ring, and a reinforcing ring outward flange portion provided at an end of the reinforcing ring cylindrical portion, It is preferable that the bottom of the second annular recess is positioned closer to the center axis direction of the inner ring and on the side of the space to be sealed than the surface of the reinforcing ring outward flange portion on which the outer ring is fitted.
  • the slinger has an outer ring portion extending from the radially outer side of the outward flange portion toward the central axis of the inner ring and toward the space to be sealed, A labyrinth seal portion may be formed between the outer ring portion and the outer peripheral surface side of the seal body.
  • the main lip is preferably in contact with the outer peripheral surface of the cylindrical portion of the slinger.
  • the side lip and the intermediate lip are preferably in contact with the planar end face of the outward flange portion.
  • the intermediate lip is also configured to contact the flat end face of the outward flange portion, thereby stably sealing compared to the case where it is configured to contact the curved surface. function can be demonstrated. This can prevent foreign matter such as muddy water from entering the main lip.
  • a sealing structure of the present invention is characterized by comprising an inner ring, an outer ring provided concentrically with the inner ring, and the sealing device for sealing an annular gap between the inner ring and the outer ring.
  • the sealing structure of the present invention is an inner ring having a cylindrical outer peripheral surface, a flat end surface, and a curved surface connecting the outer peripheral surface and the end surface; an outer ring provided concentrically with the inner ring; a sealing device used in a hub bearing for sealing an annular gap between the inner ring and the outer ring;
  • the sealing device is a slinger having a cylindrical portion attached to the inner ring and an outward flange provided at an end of the cylindrical portion; a seal body attached to the outer ring, the seal body having a reinforcing ring and an elastic sealing portion made of an elastomer material integrally provided with the reinforcing ring; with and the elastic seal portion is main lip and a side lip extending radially outward and opposite to the space to be sealed and in contact with the outward flange; an intermediate lip provided between the main lip and the side lip, extending radially outward and opposite to the space to be sealed, and in contact with the outward f
  • the dead space formed between the slinger and the inner ring can be made as narrow as possible.
  • the space formed between the slinger and the seal body can be made as wide as possible, and the capacity for holding foreign matter such as muddy water can be increased. As a result, it is possible to prevent foreign matter such as muddy water from reaching the main lip.
  • the second annular recess formed along the outer peripheral surface of the side lip is closer to the central axis of the inner ring than the first annular recess formed between the side lip and the intermediate lip. It is preferable that the depth of the recess toward the space to be sealed is deep.
  • the reinforcing ring has a reinforcing ring cylindrical portion fitted to the inner peripheral surface of the outer ring, and a reinforcing ring outward flange portion provided at an end of the reinforcing ring cylindrical portion, It is also preferable that the bottom of the second annular recess is located closer to the space to be sealed and in the direction of the central axis of the inner ring than the surface of the outward flange portion of the reinforcing ring on which the outer ring is fitted.
  • the slinger has an outer ring portion extending from the radially outer side of the outward flange portion toward the central axis of the inner ring and toward the space to be sealed, A labyrinth seal portion may be formed between the outer ring portion and the outer peripheral surface side of the seal body.
  • the main lip is preferably in contact with the outer peripheral surface of the cylindrical portion of the slinger.
  • FIG. 1 is a schematic cross-sectional view of a hub bearing according to an embodiment of the invention.
  • FIG. 2 is a schematic cross-sectional view of a sealing device according to an embodiment of the invention.
  • FIG. 3 is a schematic configuration diagram of a slinger according to an embodiment of the present invention.
  • FIG. 4 is a schematic configuration diagram of a seal body according to an embodiment of the present invention.
  • FIG. 1 is a schematic cross-sectional view of a hub bearing according to an embodiment of the invention.
  • FIG. 1 schematically shows a cross-sectional view of the hub bearing cut along a plane including the (rotational) central axis of the inner ring.
  • a car is equipped with a hub bearing 10.
  • the hub bearing 10 includes an inner ring 20, an outer ring 30 provided concentrically with the inner ring 20, and a plurality of balls 40 provided therebetween.
  • the inner ring 20 and the outer ring 30 are configured to be relatively rotatable.
  • a tire (not shown) is fixed to the inner ring 20 side, and the outer ring 30 is attached to the vehicle body side.
  • the right side in FIG. 1 is called the tire side (A), and the left side is called the vehicle body side (B).
  • a tire side (A) of the inner ring 20 is provided with an outward flange portion 21 for mounting a tire.
  • a gap between the inner ring 20 and the outer ring 30 is provided.
  • a sealing device 100, 200 is provided for sealing the annular gap.
  • the sealing device 100 on the tire side (A) is sometimes called an outer seal, and the sealing device 200 on the vehicle body side (B) is sometimes called an inner seal.
  • FIG. 2 is a schematic cross-sectional view of a sealing device according to an embodiment of the invention.
  • a portion of the inner ring 20 and a portion of the outer ring 30 when the sealing device is installed in the hub bearing are indicated by dotted lines.
  • FIG. 2 has shown sectional drawing which cut
  • FIG. 3 is a schematic configuration diagram of a slinger according to an embodiment of the present invention.
  • FIG. 4 is a schematic configuration diagram of a seal body according to an embodiment of the present invention.
  • a cross-sectional view obtained by cutting a part of the seal body along a plane including the central axis of the seal body is shown in the upper part of the figure, and an appearance is shown in the lower part of the figure.
  • the sealing device 100 according to this embodiment is particularly suitable for use as the outer seal.
  • embodiments of a sealing device 100 applied as an outer seal and a sealing structure including the sealing device 100 will be described.
  • the sealing device of the present invention is not limited to use in automotive hub bearings, and can be employed in various other uses besides industrial hub bearings.
  • the sealing structure includes an inner ring 20 , an outer ring 30 provided concentrically with the inner ring 20 , and a sealing device 100 that seals an annular gap between the inner ring 20 and the outer ring 30 .
  • the inner ring 20 has a cylindrical outer peripheral surface 22 , a flat end surface 23 , and a curved surface 24 connecting the outer peripheral surface 22 and the end surface 23 .
  • the sealing device 100 is arranged in an annular space portion between the annular portion 31 near the tip of the tire side (A) of the outer ring 30 and the outer peripheral surface 22, the end surface 23 and the curved surface 24 of the inner ring 20. .
  • a sealing device 100 includes a slinger 110 made of a rigid material such as metal, and a seal body 120 .
  • the slinger 110 includes a cylindrical portion 111 attached to the inner ring 20, an outward flange portion 112 provided at the end portion of the cylindrical portion 111, and a space to be sealed from the radially outer side of the outward flange portion 112 in the central axis line direction of the inner ring 20 and the space to be sealed. and an outer annular portion 113 extending toward the side.
  • the space to be sealed is the space between the outer seal (sealing device 100) and the inner seal (sealing device 200), in which a plurality of balls 40 are arranged and a lubricant ( This is the space filled with grease).
  • the side of the space to be sealed with respect to the sealing device 100 can also be called the vehicle body side (B).
  • the slinger 110 also has a curved portion 114 that connects the cylindrical portion 111 and the outward flange portion 112 .
  • the cylindrical portion 111 of the slinger 110 is attached along the outer peripheral surface 22 of the inner ring 20 .
  • the outward flange portion 112 of the slinger 110 is attached so as to be in close contact with the end surface 23 of the inner ring 20 .
  • the curved portion 114 of the slinger 110 is configured to closely fit the curved surface 24 on the inner ring 20 . Thereby, the dead space formed between the slinger 110 and the inner ring 20 can be made as narrow as possible.
  • the seal body 120 has a reinforcing ring 121 made of a rigid material such as metal, and an elastic seal portion 122 made of an elastomer material integrally provided with the reinforcing ring 121, and is attached to the outer ring 30.
  • the reinforcing ring 121 is configured to be attached to the outer ring 30.
  • the reinforcing ring 121 includes a cylindrical portion (reinforcing ring cylindrical portion) 121a fitted to the inner peripheral surface of the annular portion 31 of the outer ring 30, and an outward flange portion (reinforcing ring outer portion) provided at one end of the cylindrical portion 121a. and a body portion 121c extending radially inward from the other end of the cylindrical portion 121a.
  • the seal body 120 having the reinforcing ring 121 and the elastic sealing portion 122 integrally can be obtained.
  • the elastic seal portion 122 integrally includes a main lip 122a, an intermediate lip 122b, a side lip 122c, an auxiliary lip 122d, and an outer ring portion 122e.
  • the main lip 122a is configured to extend radially inward and toward the sealed space side (vehicle body side (B)). In this embodiment, the main lip 122a is configured to contact the outer peripheral surface of the cylindrical portion 111 of the slinger 110. As shown in FIG. The intermediate lip 122b is provided between the main lip 122a and the side lip 122c. The intermediate lip 122b is configured to extend radially outward and toward the opposite side (tire side (A)) of the space to be sealed, and contact the planar end face of the outward flange portion 112 of the slinger 110.
  • the side lip 122c is configured to extend radially outward and toward the opposite side (tire side (A)) of the space to be sealed and contact the planar end surface of the outward flange portion 112 of the slinger 110 .
  • auxiliary lip 122d is configured so as to extend radially outward and toward the opposite side (tire side (A)) of the space to be sealed so as not to come into contact with the slinger 110 .
  • the outer ring portion 122e is configured such that a minute annular gap is provided between the outer ring portion 113 of the slinger 110 and the outer ring portion 122e. With the above configuration, a labyrinth seal portion L is formed between the outer annular portion 113 of the slinger 110 and the outer peripheral surface side of the seal main body 120 .
  • the labyrinth seal portion L consists of a minute annular gap between the outer ring portion 122e of the seal body 120 and the outer ring portion 113 of the slinger 110, and a minute gap between the auxiliary lip 122d of the seal body 120 and the slinger 110. Consists of an annular gap.
  • a first annular recess 122f is formed between the side lip 122c and the intermediate lip 122b.
  • a second annular recess 122g is formed along the outer peripheral surface of the side lip 122c.
  • the second annular recess 122g is deeper than the first annular recess 122f in the central axis direction of the inner ring 20 and toward the space to be sealed. .
  • the second annular recess 122g is configured to be longer than the first annular recess 122f in terms of the distance from the end surface of the outward flange portion 112 of the slinger 110 where the side lip 122c and the intermediate lip 122b are in contact with the bottom of each recess. ing.
  • the depth of the recess of the second annular recess 122g is configured to be deeper than the depth of the recess of the first annular recess 122f by d1 (see FIG. 2).
  • the bottom of the second annular recess 122g is located closer to the space to be sealed and in the direction of the center axis of the inner ring 20 than the surface of the outward flange portion 121b of the reinforcing ring 121 on which the outer ring 30 is fitted (Fig. 2, see distance d2).
  • a sufficient step d3 is provided between the outward flange portion 121b of the reinforcing ring 121 and the body portion 121c.
  • the depth of the recess of the second annular recess 122g (the recess in the direction of the central axis of the inner ring 20 and toward the space to be sealed) is large, so that the outer peripheral surface of the side lip 122c It is possible to increase the capacity that can hold foreign matter such as muddy water. As a result, foreign matter such as muddy water can be prevented from entering toward the intermediate lip 122b and the main lip 122a.
  • the cross-sectional area S1 of the second annular concave portion 122g is set to 6 mm 2 or more, while it is approximately 5.6 mm 2 in the conventional structure.
  • the cross-sectional area of the space enclosed by is cut by a plane including the central axis of the sealing device 100 is defined as "the cross-sectional area S1 of the second annular recess 122g".
  • the intermediate lip 122b is also configured to contact the planar end face of the outward flange portion 112 in the same manner as the side lip 122c.
  • the intermediate lip 122b can stably perform the sealing function as compared with the case where it is configured to contact the curved surface. Therefore, even if foreign matter such as muddy water enters from the sealing portion of the side lip 122c, the intermediate lip 122b can effectively prevent the foreign matter from entering toward the main lip 122a.
  • a configuration in which a labyrinth seal portion L is formed is adopted. This can prevent foreign matter such as muddy water from entering the side lip 122c.
  • the main lip 122 a is configured to contact the outer peripheral surface of the cylindrical portion 111 of the slinger 110 . Therefore, even if the inner ring 20 is rusted, the main lip 122a is not affected by the rust.
  • the inner ring 20 is made of a material with low rust resistance, but the material of the slinger 110 can be freely selected. Therefore, by using, for example, SUS with high rust resistance as the material of the slinger 110, the sealing function of the main lip 122a can be stably exhibited over a long period of time.
  • the dead space formed between the slinger 110 and the inner ring 20 can be made as narrow as possible. can.
  • the space formed between the slinger 110 and the seal body 120 can be made as wide as possible, and the capacity for holding foreign matter such as muddy water can be increased. This can prevent foreign matter such as muddy water from reaching the main lip 122a.
  • the distance between the slinger 110 and the inner ring 20 is also increased, there is also the effect that muddy water entering from between the slinger 110 and the inner ring 20 is less likely to enter the sealed space.
  • the cross-sectional area S2 of the space surrounded by the main lip 122a and the intermediate lip 122b and the slinger 110 taken along a plane including the central axis of the sealing device 100 is 1 to 1.5 in the conventional structure. It is now possible to set it to 3 mm 2 or more, whereas it is about 5 mm 2 .
  • a plurality of means are employed to prevent foreign matter such as muddy water from entering the sealing portion of the main lip 122a. As a result, it is possible to synergistically suppress the intrusion of foreign matter such as muddy water.
  • a configuration in which a gap is provided between the slinger 110 and the end surface 23 and the curved surface 24 of the inner ring 20 can be adopted.
  • a configuration in which the labyrinth seal portion L is not provided can also be adopted. That is, a configuration in which the slinger 110 is not provided with the outer ring portion 113 and a configuration in which the seal main body 120 is not provided with the outer ring portion 122e can also be adopted.
  • a configuration in which the main lip 122a is in direct contact with the outer peripheral surface of the inner ring 20 may be employed.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Of Bearings (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
PCT/JP2023/006759 2022-03-04 2023-02-24 密封装置及び密封構造 Ceased WO2023167103A1 (ja)

Priority Applications (5)

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JP2024504660A JPWO2023167103A1 (https=) 2022-03-04 2023-02-24
CN202380015313.1A CN118434980A (zh) 2022-03-04 2023-02-24 密封装置和密封结构
US18/717,169 US12442418B2 (en) 2022-03-04 2023-02-24 Sealing device and sealing structure
KR1020247019686A KR20240101851A (ko) 2022-03-04 2023-02-24 밀봉 장치 및 밀봉 구조
EP23763362.3A EP4488538A4 (en) 2022-03-04 2023-02-24 SEALING DEVICE AND SEALING STRUCTURE

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JP2022033412 2022-03-04
JP2022-033412 2022-03-04

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EP (1) EP4488538A4 (https=)
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CN (1) CN118434980A (https=)
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012061875A (ja) 2010-09-14 2012-03-29 Ntn Corp 車輪用軸受装置
JP2019070398A (ja) * 2017-10-06 2019-05-09 内山工業株式会社 密封装置
JP2019138399A (ja) * 2018-02-13 2019-08-22 株式会社ジェイテクト 密封装置、及び密封装置の組み立て方法
JP2020079615A (ja) * 2018-11-13 2020-05-28 内山工業株式会社 密封装置
WO2020246206A1 (ja) * 2019-06-05 2020-12-10 Nok株式会社 密封装置
JP2021008948A (ja) * 2019-07-03 2021-01-28 株式会社ジェイテクト 転がり軸受装置
JP2021011938A (ja) 2019-07-09 2021-02-04 内山工業株式会社 密封装置

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5778238B2 (ja) * 2013-11-18 2015-09-16 Nok株式会社 密封装置の製造方法
JP6466082B2 (ja) * 2014-04-30 2019-02-06 内山工業株式会社 軸受密封装置
JP6748400B2 (ja) * 2014-07-01 2020-09-02 内山工業株式会社 密封装置
JP2017036740A (ja) * 2015-08-06 2017-02-16 光洋シーリングテクノ株式会社 密封装置
WO2017038751A1 (ja) * 2015-09-01 2017-03-09 Nok株式会社 密封装置
CN108027066B (zh) * 2015-10-09 2020-07-24 Nok株式会社 密封装置
JP2017124695A (ja) * 2016-01-13 2017-07-20 株式会社ジェイテクト 車輪用軸受装置
JP2017137973A (ja) * 2016-02-05 2017-08-10 光洋シーリングテクノ株式会社 ハブユニット用密封装置
JP6658216B2 (ja) * 2016-03-31 2020-03-04 株式会社ジェイテクト 車輪用軸受装置
JP6686692B2 (ja) * 2016-05-18 2020-04-22 株式会社ジェイテクト 車輪用軸受装置
EP3453905B1 (en) 2016-06-20 2024-10-02 Nok Corporation Sealing device
JP2018054095A (ja) * 2016-09-30 2018-04-05 内山工業株式会社 密封装置
JP7437723B2 (ja) * 2018-07-31 2024-02-26 内山工業株式会社 密封装置
JP7186039B2 (ja) * 2018-08-28 2022-12-08 光洋シーリングテクノ株式会社 密封装置
JP7164401B2 (ja) * 2018-11-01 2022-11-01 光洋シーリングテクノ株式会社 密封装置
US11994166B2 (en) * 2019-09-13 2024-05-28 Nok Corporation Sealing device
DE102020002878B3 (de) * 2020-05-13 2021-08-05 Nsk Deutschland Gmbh Radlagervorrichtung
JP2024011870A (ja) * 2022-07-15 2024-01-25 内山工業株式会社 密封装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012061875A (ja) 2010-09-14 2012-03-29 Ntn Corp 車輪用軸受装置
JP2019070398A (ja) * 2017-10-06 2019-05-09 内山工業株式会社 密封装置
JP2019138399A (ja) * 2018-02-13 2019-08-22 株式会社ジェイテクト 密封装置、及び密封装置の組み立て方法
JP2020079615A (ja) * 2018-11-13 2020-05-28 内山工業株式会社 密封装置
WO2020246206A1 (ja) * 2019-06-05 2020-12-10 Nok株式会社 密封装置
JP2021008948A (ja) * 2019-07-03 2021-01-28 株式会社ジェイテクト 転がり軸受装置
JP2021011938A (ja) 2019-07-09 2021-02-04 内山工業株式会社 密封装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4488538A4

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EP4488538A1 (en) 2025-01-08
US20250043826A1 (en) 2025-02-06
EP4488538A4 (en) 2025-07-16
US12442418B2 (en) 2025-10-14
CN118434980A (zh) 2024-08-02
JPWO2023167103A1 (https=) 2023-09-07
KR20240101851A (ko) 2024-07-02

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