WO2008018765A1 - Joint intégré avec un codeur pour palier - Google Patents

Joint intégré avec un codeur pour palier Download PDF

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Publication number
WO2008018765A1
WO2008018765A1 PCT/KR2007/003832 KR2007003832W WO2008018765A1 WO 2008018765 A1 WO2008018765 A1 WO 2008018765A1 KR 2007003832 W KR2007003832 W KR 2007003832W WO 2008018765 A1 WO2008018765 A1 WO 2008018765A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal
cylindrical portion
protrusion
slinger
encoder
Prior art date
Application number
PCT/KR2007/003832
Other languages
English (en)
Inventor
Jong Soon Im
Ji Hun Park
Min Chul Park
Young Tae Kim
Original Assignee
Il Jin Global Co., 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 Il Jin Global Co., Ltd. filed Critical Il Jin Global Co., Ltd.
Publication of WO2008018765A1 publication Critical patent/WO2008018765A1/fr

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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
    • 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
    • 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
    • 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
    • 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
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
    • 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
    • F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
    • 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
    • F16J15/326—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 with means for detecting or measuring relative rotation of the two elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/443—Devices characterised by the use of electric or magnetic means for measuring angular speed mounted in bearings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/488—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by variable reluctance detectors
    • 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
    • F16C19/186—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 three raceways provided integrally on parts other than race rings, e.g. third 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors
    • 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

Definitions

  • the present invention generally relates to an encoder-integrated seal for bearings, and more particularly to an encoder-integrated seal for bearings that includes a protrusion and/or an assistant protrusion to generate a flow during rotation, thereby efficiently preventing infiltration of impurities into an opening of a bearing.
  • a bearing which is mounted on car suspensions, serves to rotatably support car wheels.
  • the bearing is provided with a component for detecting rotation of the wheels so as to detect the wheel rotation in addition to the rotational support of the wheels. That is, the bearing is designed to have a device for measuring the rotational speed of the wheels to control an anti-lock braking system (ABS) or a traction control system (TCS).
  • ABS anti-lock braking system
  • TCS traction control system
  • Fig. 1 is a cross-sectional view of a hub bearing including a device for detecting a rotational speed of a car wheel.
  • Fig. 2 is an enlarged cross-sectional view of Part "A" of Fig. 1.
  • the bearing 1 having the device for detecting the rotational speed the wheel includes: an outer ring 20 having at least one outer ring race 21; an inner ring 10 having at least one inner ring race 11; a plurality of rolling elements 30 disposed between the inner ring race 11 and the outer ring race 21; and a seal 40 sealing an opening, which is defined between the inner ring 10 and the outer ring 20 to face the rolling elements 30.
  • a spline is located on an inner periphery 63 of a hub 60 and a seat 67 is formed at one side of an outer periphery thereof.
  • the hub 60 includes a flange 65 having at least one hole 65a, into which a securing bolt 70 is inserted.
  • a car wheel (not shown) is mounted on the securing bolt 70.
  • a single inner ring 10 is mounted on the seat 67.
  • the seat 67 may extend to the flange 65 such that a pair of inner rings 10 can be mounted thereon.
  • a knuckle flange 25 is formed on an outer periphery of the outer ring 20 to fix a knuckle joint (not shown) such that the knuckle joint can be connected to a suspension.
  • a molding part 61 is formed to maintain the inner ring 10 on the seat 67 of the hub 60 and to apply preload to the bearing.
  • a seal 80 is formed between the outer ring 20 and the hub 60 to seal the opening therebetween.
  • a seal support 41 mounted on an inner periphery 23 of the outer ring 20; a slinger 47 mounted on an outer periphery 13 of the inner ring 10; an elastic part 43 attached to the seal support 41 toward the slinger 47; an encoder 49 mounted on an outer side of the slinger 47; and a plurality of seal lips 35a, 35b and 35c extending from the elastic part 43 and contacting an opposite side of the slinger 47 to the encoder 39.
  • a dotted line indicates a sensor for detecting rotation of the bearing in association with the encoder 49.
  • the seal 40 may have an additional seal lip (not shown) extending from the encoder 49 and contacting the outer periphery 13 of the inner ring 10 to block the impurities from entering the gap formed between the slinger 47 and the outer periphery 13 of the inner ring 10.
  • the additional seal lip is brought into contact with the outer periphery 13 of the inner ring 10 and increases frictional resistance.
  • a contact portion of the seal lip is likely to be worn out due to a long time use, thereby deteriorating the function of preventing infiltration of impurities. Disclosure of Invention Technical Problem
  • the present invention relates to solving the foregoing problems of the prior art,
  • An aspect of the present invention is to provide an encoder- integrated seal for bearings that includes a protrusion and/or an assistant protrusion to form a flow by rotating along with the bearing, thereby preventing infiltration of impurities into the bearing.
  • an encoder- integrated seal mounted on a bearing comprising a rotary ring, a stationary ring, and a plurality of rolling elements disposed between the rotary ring and the stationary ring to be located in an opening formed between the rotary ring and the stationary ring to face the rolling elements, including: a seal support having a first cylindrical portion inserted into the stationary ring; a slinger having a second cylindrical portion inserted into the rotary ring and a radial portion extending from the second cylindrical portion in the radial direction; an elastic part attached to the seal support or the slinger; at least one seal lip extending from the elastic part and contacting one side of the slinger or the seal support; an encoder provided at one side of the radial portion of the slinger; and at least one protrusion projected from the encoder toward the first cylindrical portion of the seal support in a radial direction of the slinger.
  • the protrusion is integrated with the encoder.
  • the protrusion may have a circumferentially decreasing width and a radially decreasing height with an increase in distance from the rolling elements in an axial direction. Further, the elastic part of the seal may be attached to a portion of the first cylindrical portion or to the entire first cylindrical portion.
  • the elastic part may be attached to a portion of the first cylindrical portion of the seal support or the entire first cylindrical portion.
  • the slinger may further include a third cylindrical portion separated from the second cylindrical portion and extending from the radial portion.
  • the seal may further include at least one mud lip extending from the elastic part attached to the first cylindrical portion and contacting the third cylindrical portion.
  • the protrusion may have a radially decreasing height toward the rolling elements.
  • the protrusion may have a circumferentially increasing width toward the rolling elements.
  • the elastic part may have a radially increasing thickness toward the rolling elements.
  • the protrusion may further include a portion having a radially increasing height toward the rolling elements.
  • the seal may include at least one assistant protrusion formed opposite to the protrusion in the radial direction of the slinger and having a predetermined height and width, wherein the assistant protrusion may have a circumferentially decreasing width and a radially decreasing height with an increase in distance from the rolling elements in the axial direction.
  • a protrusion formed in the radial direction of a slinger and having a predetermined height and width toward a first cylindrical portion of a seal support rotates at the same time.
  • a turbulent flow is generated by the rotation of the protrusion to prevent adhesion of impurities to the seal and to block infiltration of impurities into the seal.
  • the seal when the seal includes a third cylindrical portion on the slinger and a mud lip contacting the third cylindrical portion, the protrusion provides more enhanced effects of blocking impurities.
  • the seal includes at least one assistant protrusion formed in the radial direction on the slinger opposite to the protrusion and having a predetermined height and width, thereby effectively preventing infiltration of impurities through a gap between a second cylindrical portion of the slinger and a rotary ring.
  • FIG. 1 is a cross-sectional view of a conventional wheel bearing
  • FIG. 2 is an enlarged cross-sectional view of part "A"in Fig. 1;
  • FIG. 3 is a partially cross-sectional view of an encoder-integrated seal for a bearing according to a first embodiment of the present invention
  • Fig. 4 is an enlarged cross-sectional view of the encoder- integrated seal of Fig. 3;
  • FIG. 5 is a partially perspective view of the encoder-integrated seal of Fig. 4;
  • Fig. 6 is a partially perspective view of a protrusion of the encoder-integrated seal of Fig. 4;
  • Fig. 7 is a cross-sectional view taken along line A-A of Fig. 6;
  • Fig. 8 is a plan view of the protrusion of Fig. 6;
  • FIG. 9 is a cross-sectional view of one modification of the encoder- integrated seal of
  • Fig. 10 is a cross-sectional view of another modification of the encoder-integrated seal of Fig. 4;
  • FIG. 11 is a cross-sectional view of an encoder-integrated seal according to a second embodiment of the present invention.
  • Figs. 12 to 17 are cross-sectional views of other modifications of the encoder- integrated seal of Fig. 10;
  • Fig. 18 is a partially cross-sectional view of an encoder-integrated seal for a bearing including a rotary outer ring. Best Mode for Carrying Out the Invention
  • FIG. 3 is a partially cross-sectional view of an encoder-integrated seal for a bearing according to a first embodiment of the present invention.
  • Fig. 4 is an enlarged cross- sectional view of the encoder-integrated seal of Fig. 3.
  • Fig. 5 is a partially perspective view of the encoder-integrated seal of Fig. 4.
  • Fig. 6 is a partially perspective view of a protrusion of the encoder-integrated seal of Fig. 4.
  • Fig. 7 is a cross-sectional view taken along line A-A of Fig. 6.
  • Fig. 8 is a plan view of the protrusion of Fig. 6.
  • the bearing 100 is used in a car wheel or the like and includes a rotary inner ring 110 and a stationary outer ring 120.
  • the wheel bearing 100 for the car includes two inner ring races 111, two outer ring races 121, and rolling elements disposed in a plurality of rows on the inner ring races 111 and the outer ring races 121.
  • the rotary inner ring 110 may include a flange on which a car wheel (not shown) will be mounted.
  • an encoder- integrated seal according to the first embodiment is mounted on the bearing 100 that includes the inner ring 110 and the outer ring 120.
  • the inner ring 110 is a rotary ring and the outer ring 120 is a stationary ring.
  • the inner ring 110 is formed with the inner ring race 111
  • the outer ring 120 is formed with the outer ring race 121
  • the plurality of rolling elements 130 are disposed between the inner and outer rings.
  • the encoder-integrated seal 140 is located in an opening, which is formed between the inner ring 110 and the outer ring 120 to face the bearing 100.
  • the seal 140 includes: a seal support 141 inserted into an inner periphery 123 of the outer ring 120; an elastic part 143 attached to the seal support 141; a slinger 147 inserted into an outer periphery 113 of the inner ring 110; an encoder 149 provided at one side of the slinger 147; and one or more seal lips 135a, 135b and/or 135c extending from the elastic part 143 and contacting the slinger 147.
  • the seal support 141 includes a first cylindrical portion 141a inserted into the inner periphery 123 of the outer ring 120 and contacting the inner periphery 123, as well as a ring-shaped portion 141b extending from the first cylindrical portion 141a in the radial direction.
  • the elastic part 143 attached to the seal support 141 is preferably formed of elastomer and may be attached only to the ring-shaped portion 141b. Alternatively, the elastic part 143 may be attached to a partial or the overall surface of the ring-shaped portion 141b and first cylindrical portion 141a, as shown in Figs. 3 and 4.
  • the slinger 147 includes a second cylindrical portion 147a inserted into the outer periphery 113 of the inner ring 110 and contacting the outer periphery 113. It also includes a radial portion 147b extending from the second cylindrical portion 147a in the radial direction.
  • the slinger 147 rotates along with the inner ring 110 when the inner ring 110 inserted into the outer periphery 113 rotates.
  • the slinger 140 is provided at one side with the encoder 149.
  • the encoder 149 includes permanent magnets, of which N-poles and S -poles are alternately located at predetermined intervals in a circumferential direction.
  • the seal 140 includes at least one protrusion 150 projected toward the first cylindrical portion 141a of the seal support 141 in the radial direction of the slinger 147.
  • the protrusion 150 may be formed integrally with the encoder 149 to possess magnetic properties of the N-pole or the S -pole.
  • the protrusion 150 may be formed of nonmagnetic material and be attached to the encoder 149 and/or the slinger 147. Mode for the Invention
  • the protrusion 150 preferably has a decreasing width and height with an increase in distance from the rolling elements 130 in a direction of a rotational axis.
  • the protrusion 150 may have a trapezoidal cross- section.
  • the protrusion 150 may have a lateral side 153 of a trapezoidal, triangular or two-triangular shape.
  • the protrusion 150 has slanted upper and lateral sides 151 and 153, and a turbulent flow is generated by the protrusion 150 when the inner ring 110 rotates. Then, incoming fluid contacts the slanted upper and lateral sides 151 and 153, and flows in a direction away from the seal lips 135a, 135b and/or 135c (to the right side and upward in Fig. 3). Accordingly, adhesion or infiltration of impurities into the bearing 100 through the seal 140 can be effectively blocked.
  • FIG. 11 is a cross-sectional view of an encoder-integrated seal according to a second embodiment of the present invention.
  • Figs. 12 to 17 are cross-sectional views of other modifications of the encoder-integrated seal of Fig. 10.
  • an encoder- integrated seal 140 includes: a seal support 141 disposed in the opening of the outer ring 120 and having a first cylindrical portion 141a and a ring-shaped portion 141b extending from the first cylindrical portion 141a in the radial direction; an elastic part 143 attached to the seal support 141 ; a slinger 147 disposed in the opening of the inner ring 110 and having a second cylindrical portion 147a, a radial portion 147b extending from the second cylindrical portion 147a in the radial direction, and a third cylindrical portion 147c extending from an end of the radial portion 147b in the axial direction; an encoder 149 provided at one side of the slinger 147; one or more seal lips 135a, 135b and/or 135c extending from the elastic part 143 and contacting the slinger 147; and at least one protrusion 150 projected toward the first cylindrical portion 141a of the seal support 141 in the
  • the seal 140 further includes a mud lip 135d extending from the elastic part 143 and contacting the third cylindrical portion 147c of the slinger 147.
  • the protrusion 150 may have a radially increasing or decreasing height with an increase in distance from the mud lip 135d.
  • the protrusion 150 has the radially increasing height with an increase in distance from the mud lip 135d.
  • impurities interposed between the protrusion 150 and the mud lip 135d can be efficiently removed.
  • the protrusion 150 has a circumferentially decreasing width with an increase in distance from the mud lip 135d, the aforementioned effects can be further enhanced.
  • the protrusion 150 may have a lateral side of a triangular, trapezoidal or two- triangular shape as shown in Figs. 11 to 13.
  • the elastic part 143 may have a decreasing thickness with an increase in distance from the mud lip 135d as shown in Figs. 14 to 16.
  • the thickness of the elastic part 143 and the height of the protrusion 150 may be radially constant regardless of the distance from the mud lip 135d as shown in Fig. 17.
  • the encoder-integrated seal 40 is mounted on the opening formed between the rotary inner ring 110 and the stationary outer ring 120 of the bearing 100. It should be noted, however, that the present invention is not limited to the aforementioned embodiments.
  • Fig. 18 is a cross-sectional view of an encoder-integrated seal 140, which is mounted in an opening between a rotary outer ring and a stationary inner ring of a bearing.
  • the encoder- integrated seal 140 for bearings includes: a seal support 141 inserted into an outer periphery 113 of the inner ring 110; an elastic part 143 attached to the seal support 141; a slinger 147 inserted into an inner periphery 123 of the outer ring 120; an encoder 149 provided at one side of the slinger 147; and one or more seal lips 135a, 135b and/or 135c extending from the elastic part 143 and contacting the slinger 147.
  • the seal support 141 includes a first cylindrical portion 141a inserted into the outer periphery 113 of the inner ring 110 to contact the outer periphery 113, and a ring- shaped portion 141b extending from the first cylindrical portion 141a in the radial direction.
  • the slinger 147 includes a second cylindrical portion 147a inserted into the inner periphery 123 of the outer ring 120 to contact the inner periphery 123, and a radial portion 147b extending from the second cylindrical portion 147a in the radial direction.
  • the bearing 100 is illustrated as having the inner ring 110 or the outer ring 120.
  • the inner ring 110 and the outer ring 120 may be expressed as a stationary ring or a rotary ring when the bearing 100 is mounted and operates.
  • the encoder-integrated seal 140 is mounted on the bearing 100, which includes a rotary ring, a stationary ring and a plurality of rolling elements disposed between the rotary ring and the stationary ring, and is disposed in an opening formed between the rotary ring and the stationary ring.
  • the seal 140 includes: a seal support 141 having a first cylindrical portion 141a inserted into the stationary ring; an elastic part 143 attached to the seal support 141; a slinger 147 having a second cylindrical portion 147 a inserted into the rotary ring and a radial portion 147b extending from the second cylindrical portion 147a in the radial direction; one or more seal lips 135a, 135b and/or 135c extending from the elastic part 143 and contacting one side of the slinger 147; an encoder 149 provided at one side of the radial portion 147b of the slinger 147; and at least one protrusion 150 projected toward the first cylindrical portion 141a of the seal support 141 in the radial direction of the slinger 147.
  • the second cylindrical portion 147a of the slinger 147 is brought into contact with the outer periphery 113 of the inner ring 110 when the inner ring 110 rotates, or brought into contact with the inner periphery 123 of the outer ring 120 when the outer ring 120 rotates.
  • the seal 140 preferably has at least one assistant protrusion 160 projected opposite the protrusion 150 in the radial direction and having a predetermined height and width.
  • the assistant protrusion 160 has a circumferentially decreasing width and a radially decreasing height with an increase in distance from the rolling elements 130.
  • the assistant protrusion 160 rotates along with the bearing 100 to generate a turbulent flow in a direction away from the second cylindrical portion 147a of the slinger 147.
  • the assistant protrusion 160 rotates, it is possible to effectively prevent adhesion of impurities to the second cylindrical portion 147a of the slinger 147 and a contact area of the rotary ring, or infiltration of impurities into the bearing 100.
  • the elastic part 143 is attached to the seal support 141, and the seal lips 135a, 135b, 135c and/or 135d extend from the elastic part 143 to contact with the slinger 147.
  • the elastic part 143 may be attached to the slinger 147, and the seal lips 135a, 135b, 135c and/or 135d may extend from the elastic part 143 to contact with the seal support 141.
  • the seal support 141 and the slinger 147 are preferably made of steel or reinforced plastics to have a predetermined level of rigidity. However, it should be noted that the present invention is not limited to these materials.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

L'invention concerne un joint intégré avec un codeur 140 monté sur un palier, comprenant un anneau rotatif, un anneau stationnaire et une pluralité d'éléments de roulement disposés entre l'anneau rotatif et l'anneau stationnaire, à placer dans une ouverture formée entre l'anneau rotatif et l'anneau stationnaire pour faire face aux éléments de roulement. Le joint 140 comprend: un support de joint 141 présentant une première partie cylindrique 141a insérée dans l'anneau stationnaire; un chasse-gouttes 147 comprenant une deuxième partie cylindrique 147a insérée dans l'anneau rotatif et une partie radiale 147b qui s'étend à partir de la deuxième partie cylindrique 147a dans la direction radiale; une partie élastique 143 attachée au support de joint 141 ou au chasse-gouttes 147; une ou plusieurs lèvre(s) de joint 135a, 135b et/ou 135c qui s'étend(ent) à partir de la partie élastique 143 et qui entre(nt) en contact avec un côté du chasse-gouttes 147 ou du support de joint 141; un codeur 140 disposé à la partie radiale 147b du chasse-gouttes 147; et au moins une saillie 150 saillant dans la direction radiale du chasse-gouttes 147 en direction de la première partie cylindrique 141a du support de joint 141. La saillie 150 tourne de concert avec le palier 100 pour générer un écoulement turbulent, empêchant ainsi l'adhérence d'impuretés sur le joint. En outre, un écoulement est généré dans une direction qui s'écarte des lèvres de joint par la saillie de manière à bloquer l'infiltration d'impuretés à travers le joint 140.
PCT/KR2007/003832 2006-08-09 2007-08-09 Joint intégré avec un codeur pour palier WO2008018765A1 (fr)

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Application Number Priority Date Filing Date Title
KR1020060075109A KR100799647B1 (ko) 2006-08-09 2006-08-09 베어링용 인코더 일체형 시일
KR10-2006-0075109 2006-08-09

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JP2014224550A (ja) * 2013-05-15 2014-12-04 株式会社ジェイテクト 密封装置、転がり軸受及び車輪用転がり軸受
JP2015086993A (ja) * 2013-11-01 2015-05-07 内山工業株式会社 軸受密封装置
JP2017223257A (ja) * 2016-06-14 2017-12-21 Nok株式会社 密封構造
JP2019199906A (ja) * 2018-05-15 2019-11-21 Nok株式会社 密封装置
JP2020143703A (ja) * 2019-03-04 2020-09-10 Ntn株式会社 車輪用軸受装置
WO2022070592A1 (fr) * 2020-09-29 2022-04-07 Nok株式会社 Dispositif d'étanchéité
US11473627B2 (en) 2019-10-04 2022-10-18 Aktiebolaget Skf Sealing device with dynamic action, particularly for rolling bearings
DE102017110087B4 (de) 2016-05-16 2023-06-22 Schaeffler Technologies AG & Co. KG Eine Kassettendichtungsvorrichtung sowie ein Lager mit einer solchen Kassettendichtungsvorrichtung

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KR101322425B1 (ko) * 2011-11-21 2013-10-28 주식회사 일진글로벌 차량의 휠 베어링용 씰
KR101322424B1 (ko) * 2011-11-23 2013-10-28 주식회사 일진글로벌 베어링의 씰링 장치 및 이를 포함하는 휠 베어링
KR101411616B1 (ko) * 2012-08-10 2014-06-25 주식회사 일진글로벌 베어링의 씰링장치
KR101366145B1 (ko) * 2012-10-16 2014-02-24 주식회사 일진글로벌 씨일 어셈블리 장착구조와 이를 이용한 차량용 휠 베어링
KR101814703B1 (ko) 2016-01-13 2018-01-04 주식회사 일진글로벌 휠 베어링 및 휠 베어링과 구동축의 체결구조
CN106640979A (zh) * 2017-02-10 2017-05-10 浙江万向精工有限公司 带两片骨架的密封组件
KR101961640B1 (ko) * 2017-05-29 2019-03-25 셰플러코리아(유) 구름 베어링용 씰
KR20200067010A (ko) * 2018-12-03 2020-06-11 주식회사 일진글로벌 실링 장치 및 이를 포함하는 휠 베어링 조립체
KR102620295B1 (ko) * 2021-11-24 2024-01-02 에스티엠(주) 이물질 유입방지 및 배출유도기능이 구비된 휠 베어링의 실링장치

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014224550A (ja) * 2013-05-15 2014-12-04 株式会社ジェイテクト 密封装置、転がり軸受及び車輪用転がり軸受
JP2015086993A (ja) * 2013-11-01 2015-05-07 内山工業株式会社 軸受密封装置
WO2015064400A1 (fr) * 2013-11-01 2015-05-07 内山工業株式会社 Dispositif d'étanchéité de palier
DE102017110087B4 (de) 2016-05-16 2023-06-22 Schaeffler Technologies AG & Co. KG Eine Kassettendichtungsvorrichtung sowie ein Lager mit einer solchen Kassettendichtungsvorrichtung
JP2017223257A (ja) * 2016-06-14 2017-12-21 Nok株式会社 密封構造
JP2019199906A (ja) * 2018-05-15 2019-11-21 Nok株式会社 密封装置
JP2020143703A (ja) * 2019-03-04 2020-09-10 Ntn株式会社 車輪用軸受装置
JP7274306B2 (ja) 2019-03-04 2023-05-16 Ntn株式会社 車輪用軸受装置
US11473627B2 (en) 2019-10-04 2022-10-18 Aktiebolaget Skf Sealing device with dynamic action, particularly for rolling bearings
US11898606B2 (en) 2019-10-04 2024-02-13 Aktiebolaget Skf Sealing device with dynamic action for rolling bearings
WO2022070592A1 (fr) * 2020-09-29 2022-04-07 Nok株式会社 Dispositif d'étanchéité

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