WO2016181515A1 - Codeur magnétique et palier à roulement - Google Patents

Codeur magnétique et palier à roulement Download PDF

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Publication number
WO2016181515A1
WO2016181515A1 PCT/JP2015/063698 JP2015063698W WO2016181515A1 WO 2016181515 A1 WO2016181515 A1 WO 2016181515A1 JP 2015063698 W JP2015063698 W JP 2015063698W WO 2016181515 A1 WO2016181515 A1 WO 2016181515A1
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WO
WIPO (PCT)
Prior art keywords
slinger
cylindrical portion
protruding
cylindrical
inner ring
Prior art date
Application number
PCT/JP2015/063698
Other languages
English (en)
Japanese (ja)
Inventor
勇樹 笠原
浅井　拡光
Original Assignee
日本精工株式会社
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Filing date
Publication date
Application filed by 日本精工株式会社 filed Critical 日本精工株式会社
Priority to PCT/JP2015/063698 priority Critical patent/WO2016181515A1/fr
Publication of WO2016181515A1 publication Critical patent/WO2016181515A1/fr

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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
    • 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
    • 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
    • F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting 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
    • 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
    • F16C33/7889—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to an inner race and extending toward the outer 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
    • 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

Definitions

  • the present invention relates to, for example, a magnetic encoder used for detecting the number of rotations of a rotating member such as an automobile wheel and a rolling bearing including the magnetic encoder.
  • the sealing device described in Patent Document 1 generates a magnetic pulse by attaching a sealing member attached to a fixed member, a slinger formed of ferritic stainless steel and fitted to a rotating member, and attached to an outer surface of the slinger.
  • An encoder, and the bearing is sealed by a seal member that is in sliding contact with the slinger.
  • the encoder is made of an elastic magnetic material in which magnetic powder is mixed with an elastic material made of rubber or resin, and is bonded to the outer surface of the slinger by pressure bonding.
  • a lip-shaped piece provided in the encoder is brought into contact with the rotating member, and a magnetic liquid to which ferrite is added is injected into the space between the slinger and the sealing member. And the bearing is sealed.
  • This invention is made
  • the objective can improve the sealing performance of the fitting part of a slinger and a rotation member, and can maintain productivity equivalent to the past. It is to provide a magnetic encoder and a rolling bearing.
  • a slinger having a cylindrical portion that can be fitted to the rotating member, and a flange portion extending in a radial direction from the cylindrical portion, and attached to the outer surface of the flange portion of the slinger by an adhesive, and multipolar in the circumferential direction.
  • a magnetic encoder comprising a magnetized substantially annular magnet part, wherein the cylindrical part is a linear part fitted to the rotating member, and an R part is a boundary part between the linear part and the flange part,
  • the magnet part has a protruding part that protrudes in the radial direction from the fitting surface of the cylindrical part, and the protruding part is an R part of the cylindrical part, a linear part of the cylindrical part, or a cylindrical part.
  • the projecting portion is formed from the R portion to the straight portion, and the projecting thickness of the projecting portion is set to 1 to 20% of the plate thickness of the cylindrical portion. By fitting the slinger to the rotating member, the projecting portion becomes the rotating member.
  • a magnetic encoder characterized in that it is sandwiched between a cylindrical part of a slinger and interposed in a wedge shape (2)
  • An inner ring having an inner ring raceway surface on an outer peripheral surface, an outer ring having an outer ring raceway surface on an inner peripheral surface, and a plurality of rolling elements arranged to be freely rollable between the inner ring raceway surface and the outer ring raceway surface;
  • a rolling bearing having a seal member attached to one of the inner peripheral surface of the outer ring and the outer peripheral surface of the inner ring and sealing the inside of the bearing, and a magnetic encoder attached to the other of the inner peripheral surface of the outer ring and the outer peripheral surface of the inner ring.
  • a rolling bearing, wherein the magnetic encoder is the magnetic encoder according to (1).
  • the magnet portion has a protruding portion that protrudes in the radial direction from the fitting surface of the cylindrical portion, and the protruding portion is the R portion of the cylindrical portion, the linear portion of the cylindrical portion, or the cylinder. It is formed from the R part of the part to the straight part, and the protrusion thickness of the protrusion part is set to 1 to 20% of the plate thickness of the cylindrical part, and the protrusion part rotates by fitting the slinger to the rotating member. Since it is sandwiched between the member and the cylindrical portion of the slinger and interposed in a wedge shape, the sealing performance of the fitting portion between the slinger and the rotating member can be improved. Moreover, since a protrusion part can be provided in a magnet part, without increasing a process man-hour, productivity equivalent to the past can be maintained.
  • the magnet part is made of a material that is difficult to bend, it is difficult to implement the sealing device using the lip-shaped piece described in Patent Document 2. That is, in order to improve the heat resistance and wear resistance of the magnetic encoder, when the magnet portion is made of a hard and hard-to-deform material, when the magnetic encoder is fitted to the rotating member, the rotating member of the lip-shaped piece In some cases, a crack or a chip may be generated in the contact portion, or a gap may be generated in a part of the contact portion in the circumferential direction due to plastic deformation. However, according to the present invention, the fitting portion can be sealed even when the magnet portion is formed of a hard and hardly deformable material.
  • the present invention is particularly suitable for a material having a thickness of 3.0 mm, ASTM D790; a span distance of 50 mm, and a bending resistance at 23 ° C. of 15 mm or less, and more preferably a high bending resistance.
  • the reason why the projection thickness of the projection portion of the magnet portion according to the present invention is set to 1 to 20% of the plate thickness of the cylindrical portion of the slinger will be described.
  • the necessity of setting the protrusion thickness of the protrusion of the magnet portion to 1 to 20% of the plate thickness of the cylindrical portion of the slinger requires a magnet member sandwiched between the rotating member and the slinger and interposed in a wedge shape. This is to obtain a sufficient compressive force.
  • the protruding thickness is smaller than 1% of the plate thickness of the cylindrical portion, the magnet member interposed between the rotating member and the slinger due to the slinger swell and interposed in a wedge shape cannot obtain a sufficient compressive force. The effect may not be obtained.
  • the protrusion thickness is larger than 20% of the plate thickness of the cylindrical portion, when the magnetic encoder is fitted to the rotating member, the protruding portion is not sandwiched between the rotating member and the slinger and is cracked or scraped. there is a possibility.
  • the rotating member to which the magnetic encoder is attached, and the slinger of the magnetic encoder are made of a ferrous metal, that is, a material having a physical property of about 200 GPa in the longitudinal elastic modulus, and the rotating member and the slinger are the slinger.
  • the diameter of the cylindrical portion is 0.1 to 0.4%, that is, a fitting tightening margin of about several ⁇ m to several hundred ⁇ m. Further, since the thickness of the slinger is sufficiently smaller than the thickness of the rotating member and the diameter of the encoder fitting portion, the deformation due to the fitting almost occurs in the magnetic encoder.
  • the present invention defines the protruding thickness of the protruding portion of the magnet portion as a ratio to the plate thickness of the cylindrical portion of the slinger. Since the general plate thickness of the slinger is about 0.5 to 0.8 mm, the protruding thickness of the protruding portion of the magnet portion is considered to be about 5 to 100 ⁇ m.
  • the rolling bearing 10 of the present embodiment includes an inner ring (rotating member) 11 having an inner ring raceway surface 11a on an outer peripheral surface 11b and an outer ring (fixing member) having an outer ring raceway surface 12a on an inner peripheral surface 12b. 12, a plurality of rolling elements 13 that are rotatably arranged between the inner ring raceway surface 11a and the outer ring raceway surface 12a, and a seal member 14 that is attached to the inner peripheral surface 12b of the outer ring 12 and seals the inside of the bearing. And a magnetic encoder 15 attached to the outer peripheral surface 11 b of the inner ring 11 so as to face the seal member 14.
  • the seal member 14 includes an annular core metal 16 having a substantially L-shaped cross section, and a seal portion 17 made of an elastic body such as rubber or elastomer that is bonded to the inner peripheral surface of the core metal 16.
  • Three seal lips 18a, 18b, and 18c are integrally formed in the seal portion 17.
  • the seal lips 18a and 18b are in sliding contact with a cylindrical portion 20a and a flange portion 20b of a slinger 20 which will be described later, and the seal lip 18c constitutes a labyrinth seal having a slight gap with the cylindrical portion 20a.
  • the magnetic encoder 15 includes a slinger 20 and a substantially annular magnet portion 21 fixed to the slinger 20.
  • the slinger 20 is an annular member having a substantially L-shaped cross section, and includes a cylindrical portion 20a that is externally fitted and fixed to the outer peripheral surface 11b of the inner ring 11, and a flange portion 20b that extends radially outward from the cylindrical portion 20a.
  • the cylindrical portion 20a is a cross-sectional circle that is a boundary portion between the straight portion 20c (range A in FIG. 2) fitted to the outer peripheral surface 11b of the inner ring 11 and the straight portion 20c (cylindrical portion 20a) and the flange portion 20b.
  • Arc-shaped R portion 20d (range B in FIG. 2).
  • the slinger 20 is formed by, for example, pressing a stainless steel plate material that does not deteriorate the magnetic characteristics of the magnet portion 21 and has corrosion resistance.
  • the magnet portion 21 is a multipolar magnet having N poles and S poles alternately magnetized in the circumferential direction, and is attached to the outer surface of the flange portion 20b of the slinger 20 by insert molding. Moreover, the magnet part 21 performs the molding of the magnet part 21 and the adhesion to the slinger 20 at the same time by the insert molding with the slinger 20 coated with the adhesive that progresses the curing reaction by the insert molding as the flange part 20b. It is attached.
  • a magnetic sensor 24 capable of detecting the magnetism of the magnet unit 21 is disposed facing the outside of the bearing of the magnet unit 21.
  • the magnetic sensor 24 detects the detected magnetic change as the rotation of the inner ring 11.
  • the magnet portion 21 is formed to wrap around from the outer surface to the outer peripheral surface of the flange portion 20b toward the outer diameter side, and is formed to wrap around to the inner diameter side over the R portion 20d of the cylindrical portion 20a. Yes.
  • the magnet portion 21 is formed on the inner diameter side of the R portion 20d of the cylindrical portion 20a of the slinger 20, and is radially inward from the inner peripheral surface (fitting surface) 20e of the cylindrical portion 20a. It has the protrusion part 22 which protrudes.
  • the protruding portion 22 is formed integrally and continuously at the inner diameter side end portion of the magnet portion 21.
  • the protruding portion 22 is formed such that a portion slightly closer to the flange portion 20b than the boundary line D between the linear portion 20c and the R portion 20d of the cylindrical portion 20a in the magnet portion 21 protrudes gently toward the inner diameter side of the cylindrical portion 20a. Is.
  • the projecting portion 22 is formed in a substantially trapezoidal cross section, and has a tapered surface 23a that is gently inclined from the maximum projecting position toward the inner peripheral surface 20e of the cylindrical portion 20a at the axially inner portion thereof.
  • the axially outer portion has a tapered surface 23b that is gently inclined from the maximum projecting position toward the axially outer side and the radially outer side.
  • the protruding thickness t of the protruding portion 22 is set to 1 to 20% of the plate thickness of the cylindrical portion 20a of the slinger 20.
  • the projecting thickness t of the projecting portion 22 is set to 1 to 20% of the plate thickness of the cylindrical portion 20a when the projecting thickness t is smaller than 1% of the plate thickness of the cylindrical portion 20a.
  • the projecting thickness t is larger than 20% of the plate thickness of the cylindrical portion 20a. This is because the protrusion 22 may be broken or scraped by the fitting with the inner ring 11.
  • the protruding thickness t is set to 3 to 10 of the plate thickness of the cylindrical portion 20a. It is more preferable to set to%.
  • the magnet portion 21 is made of an elastic material in which 86 to 92% by mass of magnetic powder and an elastic binder are mixed.
  • the magnetic powder ferrite such as strontium ferrite or barium ferrite, or rare earth magnetic powder such as neodymium-iron-boron, samarium-cobalt, samarium-iron can be used, and the magnetic properties of the ferrite can be improved. Therefore, it may be a mixture of rare earth elements such as lanthanum.
  • the elastic binder examples include rubber materials such as nitrile rubber and acrylic rubber, and thermoplastic resin materials such as polyamide 6, polyamide 12, polyamide 612, polyamide 11, and polyphenylene sulfide (PPS).
  • thermoplastic resin materials such as polyamide 6, polyamide 12, polyamide 612, polyamide 11, and polyphenylene sulfide (PPS).
  • PPS polyphenylene sulfide
  • the content of the magnetic powder is 86 to 92% by mass with respect to the total amount.
  • the content is less than 86% by mass, the magnetic properties are inferior and it becomes difficult to magnetize multiple poles at a narrow pitch. If it is larger than mass%, the amount of the binder is insufficient, the mechanical strength of the entire magnetic encoder is lowered, and molding becomes difficult.
  • the adhesive bonding state between the slinger 20 and the magnet part 21 is not appropriate, a crack occurs in the magnet part 21, and the magnet part 21 falls off the slinger 20, There is a possibility that a gap is generated between the slinger 20 and the magnet portion 21 is scraped or peeled off when the inner ring 11 is fitted. For this reason, it is recommended to use an adhesive for bonding the magnet portion 21 and the slinger 20.
  • the adhesive is preferably at least one selected from the group consisting of a phenol resin adhesive that undergoes a curing reaction during insert molding and an epoxy resin adhesive.
  • a chamfered portion 11c is formed at an outer end portion in the axial direction of the outer peripheral surface 11b of the inner ring 11 into which the cylindrical portion 20a of the slinger 20 is fitted.
  • a first inclined plane S1 formed flat at an inclination angle ⁇ from the outer peripheral surface 11b of the inner ring 11 toward the outer end face, and a first flat formed at an inclination angle ⁇ from the outer end portion of the first inclined plane S1. 2 inclined planes S2.
  • the boundary portion between the outer peripheral surface 11b of the inner ring 11 and the first inclined plane S1 and the boundary portion between the first inclined plane S1 and the second inclined plane S2 are each formed into a smooth curved surface.
  • the inclination angle ⁇ of the first inclined plane S1 is set to an angle ( ⁇ ⁇ ) smaller than the inclination angle ⁇ of the second inclined plane S2.
  • the inclination angle ⁇ is preferably set in the range of 5 ° to 30 °.
  • the inclination angle ⁇ is in the range of 5 ° to 30 °.
  • the inclination angle ⁇ is more preferably set to 10 ° to 20 ° from the viewpoint of guiding the slinger 20 at the time of fitting and preventing the magnet portion 21 from being scraped or peeled off.
  • the shape of the chamfered portion 11c (particularly, the chamfered length from the axially outer end surface of the inner ring 11) is such that the protruding portion 22 formed on the R portion 20d of the slinger 20 is replaced with the outer peripheral surface 11b of the inner ring 11 and the R portion of the slinger 20. It has a shape that can be sandwiched by 20d. That is, the chamfering amount of the chamfered portion 11c is relatively small.
  • the chamfering amount of the chamfered portion 11c is large, and the structure in which the protruding portion 22 is sandwiched between the chamfered portion 11c and the R portion 20d of the slinger 20 may lose the sealing performance due to deterioration of the magnet portion 21 over time. There is not preferable.
  • the chamfered portion 11c is not limited to the above-described two-stage configuration, and may be a one-stage configuration including only the first inclined plane S1 having the inclination angle ⁇ . Further, in order to smoothly fit the cylindrical portion 20a of the slinger 20 to the inner ring 11, it is more preferable to chamfer the end portion of the cylindrical portion 20a of the slinger 20 on the side away from the flange portion 20b.
  • the cylindrical portion 20 a of the slinger 20 is inserted into the outer peripheral surface 11 b of the inner ring 11.
  • the inner peripheral surface 20e of the cylindrical portion 20a is chamfered on the inner ring 11. It abuts on the second inclined plane S2 of the portion 11c.
  • the flange portion 20 b of the slinger 20 is inserted to a position beyond the chamfered portion 11 c, and the protruding portion 22 of the magnet portion 21 is inserted into the inner ring 11.
  • the outer peripheral surface 11b of the slinger 20 and the R portion 20d of the slinger 20 are sandwiched in a wedge-like state. Thereby, the fitting portion between the cylindrical portion 20 a of the slinger 20 and the outer peripheral surface 11 b of the inner ring 11 is sealed by the protruding portion 22.
  • the interference between the inner peripheral surface 20e of the cylindrical portion 20a and the outer peripheral surface 11b of the inner ring 11 is set to 0.1% to 0.4% of the diameter dimension.
  • the tightening margin is set to 0.1% to 0.4%.
  • the fitting force (fixing force) becomes weak, and the slinger 20 is moved or disconnected.
  • the tightening margin is larger than 0.4%, the increase in the fitting force (fixing force) is small compared to the ratio of the plastic deformation of the slinger 20 being large, and the magnet portion 21 is scraped off. This is because the possibility of being peeled off or peeled off increases.
  • the magnet portion 21 protrudes more radially than the inner peripheral surface (fitting surface) 20e of the cylindrical portion 20a of the slinger 20.
  • the projecting portion 22 is formed on the R portion 20d of the cylindrical portion 20a, and the projecting thickness t of the projecting portion 22 is set to 1 to 20% of the plate thickness of the cylindrical portion 20a.
  • the protruding portion 22 is sandwiched between the outer peripheral surface 11 b of the inner ring 11 and the cylindrical portion 20 a of the slinger 20 and interposed in a wedge shape, so that the fitting portion between the slinger 20 and the inner ring 11 is Sealability can be improved.
  • the protrusion part 22 can be provided in the magnet part 21 without increasing a processing man-hour, productivity equivalent to the past can be maintained.
  • the magnet portion 21 contains at least magnetic powder and an elastic binder, and the magnetic powder is 86 to 92 mass% with respect to the total amount. Therefore, the magnet unit 21 has appropriate elasticity. For this reason, since the protrusion part 22 of the magnet part 21 is appropriately crushed between the outer peripheral surface 11b of the inner ring 11 and the cylindrical part 20a of the slinger 20, the sealing performance of the fitting part between the slinger 20 and the inner ring 11 is improved. It can be further increased.
  • the protruding thickness t of the protruding portion 22 of the magnet portion 21 is larger than that of the above-described embodiment, and the tapered surface of the axially outer portion of the protruding portion 22 is used. 23b may be steeper than in the above embodiment. Also in this case, the protruding thickness t of the protruding portion 22 is set to 1 to 20% of the plate thickness of the cylindrical portion 20a of the slinger 20, more preferably set to 3 to 10% of the plate thickness of the cylindrical portion 20a. Yes.
  • a horizontal plane 23 c extending in the axial direction may be formed on the outer side in the axial direction from the protruding portion 22 of the magnet portion 21.
  • the protruding thickness t of the protruding portion 22 is set to 1 to 20% of the plate thickness of the cylindrical portion 20a of the slinger 20, more preferably set to 3 to 10% of the plate thickness of the cylindrical portion 20a. Yes.
  • the magnet portion 21 is formed on the inner diameter side of the straight portion 20c and the R portion 20d of the cylindrical portion 20a of the slinger 20, and the inner peripheral surface (fitting surface) of the cylindrical portion 20a.
  • the protrusion 22A protrudes inward in the radial direction from 20e. More specifically, the protruding portion 22A is formed continuously from the R portion 20d of the cylindrical portion 20a of the slinger 20 to a part of the linear portion 20c.
  • the projecting portion 22A is formed in a substantially triangular cross section, and has a tapered surface 23d that is gently inclined from the maximum projecting position toward the inner peripheral surface 20e of the cylindrical portion 20a on the inner side in the axial direction.
  • a taper surface 23e that gently slopes from the maximum projecting position toward the outside in the axial direction and outward in the radial direction is provided at the outer portion in the direction.
  • the protruding thickness t of the protruding portion 22A is set to 1 to 20% of the plate thickness of the cylindrical portion 20a of the slinger 20 as in the first embodiment, and more preferably 3 to 3% of the plate thickness of the cylindrical portion 20a. It is set to 10%.
  • the portion where the protrusion thickness t of the protrusion 22A is the maximum is on the R portion 20d side of the cylindrical portion 20a, but is not limited to this, and the portion on the straight portion 20c side of the cylindrical portion 20a is present. May be.
  • the magnet portion 21 protrudes more radially than the inner peripheral surface (fitting surface) 20e of the cylindrical portion 20a of the slinger 20.
  • the protruding portion 22A is formed from the R portion 20d of the cylindrical portion 20a to the straight portion 20c, and the protruding thickness t of the protruding portion 22A is 1 to 20% of the plate thickness of the cylindrical portion 20a.
  • the protruding portion 22A is sandwiched between the outer peripheral surface 11b of the inner ring 11 and the cylindrical portion 20a of the slinger 20, and is interposed like a wedge.
  • the sealing property of the fitting part can be enhanced.
  • the protruding portion 22A can be provided on the magnet portion 21 without increasing the number of processing steps, productivity equivalent to that in the past can be maintained.
  • the protruding portion 22A of the magnet portion 21 may be formed with a substantially uniform protruding thickness t on the inner diameter side of the linear portion 20c.
  • the protrusion thickness t of the protrusion 22A is set to 1 to 20% of the plate thickness of the cylindrical portion 20a of the slinger 20, more preferably 3 to 10% of the plate thickness of the cylindrical portion 20a. Yes.
  • the protruding portion 22A of the magnet portion 21 is formed with a substantially uniform protruding thickness t on the inner diameter side of the linear portion 20c and the R portion 20d.
  • the horizontal surface 23f extended in an axial direction may be formed in the axial direction outer side part from 22 A of protrusion parts.
  • the protrusion thickness t of the protrusion 22A is set to 1 to 20% of the plate thickness of the cylindrical portion 20a of the slinger 20, more preferably 3 to 10% of the plate thickness of the cylindrical portion 20a. Yes. About another structure and an effect, it is the same as that of the said 1st Embodiment.
  • the seal member 14 is fitted on the outer peripheral surface 11b of the inner ring 11 that is a fixed member, and the magnetic encoder 15 is attached to the inner peripheral surface 12b of the outer ring 12 that is a rotating member. It is fitted inside.
  • the shape of the seal member 14 is a shape obtained by reversing the one in the first embodiment in the radial direction, and the shape of the magnetic encoder 15 is the one in the second modification of the first embodiment in the radial direction. Inverted shape.
  • a chamfered portion 12 c having the same shape as the chamfered portion 11 c is formed at the axially outer end portion of the inner peripheral surface 12 b of the outer ring 12.
  • the protruding thickness t of the protruding portion 22 is set to 1 to 20% of the plate thickness of the cylindrical portion 20a of the slinger 20, more preferably 3 to 10% of the plate thickness of the cylindrical portion 20a.
  • the shape of the protrusion is the same as that of the first embodiment, the first and second modifications of the first embodiment, the second embodiment, the first modification and the second modification of the second embodiment. Any shape may be sufficient and another shape may be sufficient.
  • the magnet portion 21 protrudes in the radial direction from the outer peripheral surface (fitting surface) 20e of the cylindrical portion 20a of the slinger 20.
  • the protruding portion 22 is formed on the R portion 20 d of the cylindrical portion 20 a, the protruding thickness t of the protruding portion 22 is set to 1 to 20% of the plate thickness of the cylindrical portion 20 a, and the slinger 20 is attached to the outer ring.
  • the protruding portion 22 is sandwiched between the inner peripheral surface 12 b of the outer ring 12 and the cylindrical portion 20 a of the slinger 20 and interposed in a wedge shape, so that the fitting portion of the slinger 20 and the outer ring 12 is Sealability can be improved. Moreover, since the protrusion part 22 can be provided in the magnet part 21 without increasing a processing man-hour, productivity equivalent to the past can be maintained. About another structure and an effect, it is the same as that of the said 1st and 2nd embodiment.
  • the protruding portion is formed from the R portion of the cylindrical portion of the slinger or the R portion of the cylindrical portion to the straight portion, but is not limited to this, and the straight portion of the cylindrical portion of the slinger It may be formed only on the part.
  • magnetic encoder examples and comparative examples having protrusions shown in Table 1, Table 2, Table 5, and Table 6 below were prepared, and damage during fitting to each of them was made. Tests and penetration resistance tests were performed.
  • the rotating member is an inner ring and the fixed member is an outer ring. Further, the outer diameter of the inner ring and the inner diameter of the cylindrical portion of the magnetic encoder are 61 mm in diameter.
  • the slinger of the rotating member, the fixed member, and the magnetic encoder is an iron-based metal having a longitudinal elastic modulus of about 200 GPa. The slinger is manufactured by press molding from a steel material having a thickness of 0.6 mm.
  • the magnet member is manufactured integrally with the slinger by insert molding using a material having a thickness of 3.0 mm, ASTM D790; distance between spans of 50 mm, and a bending deflection amount at about 23 ° C. of about 7 mm.
  • the tightening margin between the rotating member and the slinger is about 0.25% of the inner diameter of the slinger.
  • the rotating member is an outer ring and the fixed member is an inner ring.
  • the inner diameter of the outer ring and the outer diameter of the cylindrical portion of the magnetic encoder are 72 mm in diameter.
  • the slinger of the rotating member, the fixed member, and the magnetic encoder is an iron-based metal having a longitudinal elastic modulus of about 200 GPa.
  • the slinger is manufactured by press molding from a steel material having a thickness of 0.6 mm.
  • the magnet member is manufactured integrally with the slinger by insert molding using a material having a thickness of 3.0 mm, ASTM D790; distance between spans of 50 mm, and a bending deflection amount at about 23 ° C. of about 7 mm.
  • the tightening margin between the rotating member and the slinger is about 0.25% of the outer diameter of the slinger.
  • the magnetic encoder of Example 1 in Table 1 corresponds to the magnetic encoder shown in the first embodiment, and the magnetic encoders of Examples 2 to 11 in Table 1 and Table 2 are the magnetic encoders shown in the second embodiment.
  • the magnetic encoders of Examples 12 to 20 in Tables 5 and 6 correspond to magnetic encoders fitted to the inner peripheral surface of the outer ring as shown in the third embodiment.
  • the position (x) shown in Table 1, Table 2, Table 5, and Table 6 is an axial position with reference to the boundary line D shown in FIG. Is-.
  • the protrusion thickness (y) shown in Table 1 and Table 2 is a radial position with reference to the fitting surface of the cylindrical portion 20a to the inner ring, as shown in FIG. +, The outside in the radial direction is-.
  • the protruding thickness (y) shown in Tables 5 and 6 is a radial position with reference to the fitting surface of the cylindrical portion 20a to the outer ring, as shown in FIG. +, Radially inside is-.
  • the maximum protrusion thickness in each table is equal to the protrusion thickness (t) of the protrusion.
  • the fitting damage test is a test in which a sample magnetic encoder is press-fitted into an inner ring to check whether or not the magnet portion of the magnetic encoder is cracked or scraped.
  • the magnetic encoder of the sample is press-fitted to the inner ring in Examples 1 to 11, and press-fitted to the outer ring in Examples 12 to 20, and the penetrating liquid (microcheck) is inserted into the fitting part.
  • the penetrating liquid microcheck
  • Rolling bearings 11 Inner ring (rotating member) 11a Inner ring raceway surface 11b Outer peripheral surface 12 Outer ring (fixing member) 12a outer ring raceway surface 12b inner circumferential surface 13 rolling element 14 seal member 15 magnetic encoder 20 slinger 20a cylindrical portion 20b flange portion 20c linear portion 20d R portion 20e inner circumferential surface (fitting surface), outer circumferential surface (fitting surface) 21 Magnet part 22, 22A Projection part A Range of straight part B Range of R part C Range of cylindrical part D Boundary line between straight part and R part

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

Abstract

L'invention concerne un codeur magnétique et un palier à roulement, par lesquels des propriétés d'étanchéité d'une partie de montage d'une bague d'étanchéité et d'un élément rotatif peuvent être améliorées, et une productivité égale à celle de l'état de la technique peut être maintenue. Un codeur magnétique (15) comprend : une bague d'étanchéité (20) ayant une partie cylindrique (20a) apte à s'ajuster dans un élément rotatif (11), et une partie bride (20b) s'étendant dans une direction radiale à partir de la partie cylindrique ; et une partie magnétique sensiblement annulaire (21) magnétisé de façon multipolaire dans la direction circonférentielle et fixée à la surface extérieure de la partie bride de la bague d'étanchéité par un adhésif ; la partie magnétique ayant une partie en saillie (22) qui fait davantage saillie qu'une surface d'ajustement (20e) de la partie cylindrique dans la direction radiale, la partie en saillie étant formée de façon à s'étendre sur une partie R (20d) de la partie cylindrique, une partie linéaire (20c) de la partie cylindrique, ou une partie linéaire à partir de la partie R de la partie cylindrique, l'épaisseur de saillie (t) de la partie en saillie étant établie de 1 à 20 % de l'épaisseur de plaque de la partie cylindrique, et par ajustement de la bague d'étanchéité dans l'élément rotatif, la partie en saillie est pincée entre l'élément rotatif et la partie cylindrique de la bague d'étanchéité et interposée sous une forme de coin entre ces derniers.
PCT/JP2015/063698 2015-05-12 2015-05-12 Codeur magnétique et palier à roulement WO2016181515A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12013038B2 (en) 2020-06-12 2024-06-18 Nok Corporation Sealing device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009127668A (ja) * 2007-11-20 2009-06-11 Koyo Sealing Techno Co Ltd 密封装置
JP2013061052A (ja) * 2011-09-15 2013-04-04 Nsk Ltd エンコーダ付車輪支持用転がり軸受ユニット
JP2013079900A (ja) * 2011-10-05 2013-05-02 Nsk Ltd エンコーダ及び組み合わせシールリング付ハブユニット
JP2013160303A (ja) * 2012-02-06 2013-08-19 Uchiyama Manufacturing Corp 密封装置の嵌合方法及び密封装置
WO2015056526A1 (fr) * 2013-10-16 2015-04-23 日本精工株式会社 Bague de joint d'étanchéité avec codeur et unité de palier à rouleaux avec codeur en combinaison

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009127668A (ja) * 2007-11-20 2009-06-11 Koyo Sealing Techno Co Ltd 密封装置
JP2013061052A (ja) * 2011-09-15 2013-04-04 Nsk Ltd エンコーダ付車輪支持用転がり軸受ユニット
JP2013079900A (ja) * 2011-10-05 2013-05-02 Nsk Ltd エンコーダ及び組み合わせシールリング付ハブユニット
JP2013160303A (ja) * 2012-02-06 2013-08-19 Uchiyama Manufacturing Corp 密封装置の嵌合方法及び密封装置
WO2015056526A1 (fr) * 2013-10-16 2015-04-23 日本精工株式会社 Bague de joint d'étanchéité avec codeur et unité de palier à rouleaux avec codeur en combinaison

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12013038B2 (en) 2020-06-12 2024-06-18 Nok Corporation Sealing device

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