WO2018230641A1 - Roller bearing - Google Patents

Roller bearing Download PDF

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Publication number
WO2018230641A1
WO2018230641A1 PCT/JP2018/022722 JP2018022722W WO2018230641A1 WO 2018230641 A1 WO2018230641 A1 WO 2018230641A1 JP 2018022722 W JP2018022722 W JP 2018022722W WO 2018230641 A1 WO2018230641 A1 WO 2018230641A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller bearing
seal member
flange portion
peripheral surface
flange
Prior art date
Application number
PCT/JP2018/022722
Other languages
French (fr)
Japanese (ja)
Inventor
将 土屋
智秋 寺田
聖也 丸亀
Original Assignee
Ntn株式会社
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
Priority claimed from JP2018097150A external-priority patent/JP2019002560A/en
Application filed by Ntn株式会社 filed Critical Ntn株式会社
Priority to EP18818789.2A priority Critical patent/EP3640489A4/en
Publication of WO2018230641A1 publication Critical patent/WO2018230641A1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/24Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
    • F16C19/26Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/44Needle bearings
    • F16C19/46Needle bearings with one row or needles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72Sealings
    • F16C33/76Sealings of ball or roller bearings
    • F16C33/78Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members

Definitions

  • the present invention relates to a roller bearing, and more particularly to a roller bearing provided with a seal member.
  • roller bearing provided with a seal member for the purpose of sealing lubricating oil inside the bearing or preventing intrusion of fluid or foreign matter from the outside.
  • Patent Document 1 thin edge portions are provided at both axial end portions of a cylindrical outer ring that does not have a flange extending radially inward.
  • a seal member having a substantially S-shaped cross section is fitted.
  • This needle roller bearing is fitted in a housing of a fluid control valve of an internal combustion engine (engine), and a seal member having a substantially S-shaped cross section is disposed in close contact with the housing, thereby allowing fluid (exhaust gas). ) Is prevented from entering the bearing.
  • a metal core may be provided on the seal member.
  • the manufacturing cost of the sealing member increases. Therefore, when a core metal is provided on the seal member, there is a problem that the manufacturing cost of the roller bearing increases.
  • the present invention has been made in order to solve the above-described problems, and an object of the present invention is to reinforce the seal member without providing a cored bar and to prevent wear of the seal member. It is to provide a roller bearing.
  • the roller bearing according to an aspect of the present invention includes an outer ring, a plurality of rollers, and a seal member.
  • the outer ring has a cylindrical portion whose inner peripheral surface forms a raceway surface, and a flange portion connected to at least one axial end of the cylindrical portion.
  • the plurality of rollers roll on the raceway surface of the cylindrical portion, and rotatably support the rotating element.
  • the seal member is held by the flange portion.
  • the flange portion includes a first portion extending radially inward from the end of the cylindrical portion, and a second portion extending axially outward from the radially inner end of the first portion.
  • the roller bearing may further include a cage that accommodates the roller.
  • the flange portion be disposed so as to restrict the axial movement of the cage.
  • the cage is opposed to the radially inner end of the first portion of the flange portion in the axial direction.
  • the seal member includes an inner diameter side seal portion disposed between the outer peripheral surface of the rotating element and the second portion of the flange portion.
  • the seal member When the outer ring is fitted in the housing, the seal member preferably includes an outer diameter side seal portion disposed between the inner peripheral surface of the housing and the second portion of the flange portion.
  • the seal member When the outer ring is fitted in the housing, the seal member may be disposed so as to surround the second portion of the flange portion between the outer peripheral surface of the rotating element and the inner peripheral surface of the housing. desirable.
  • the thickness of the second portion of the flange portion is equal to or less than the thickness of the first portion.
  • the seal member includes a lip in contact with the outer peripheral surface of the rotating element.
  • the seal member includes a first region disposed between an inner peripheral surface of the housing into which the outer ring is fitted and the second portion of the flange portion, and an axially outer side of the first region.
  • a second region having a lip disposed between the inner peripheral surface and the outer peripheral surface of the rotating element and in contact with the outer peripheral surface of the rotating element.
  • the first region is disposed in contact with the outer surface of the first portion of the flange portion, and the second region faces the axially outer end surface of the second portion of the flange portion in a non-contact state. It is desirable to have a part.
  • the facing part includes the base part of the lip.
  • the axis of the outer diameter surface or inner diameter surface of the second portion of the flange portion is disposed inside a virtual circle having a diameter of 0.5 mm centering on the axis of the inner peripheral surface of the housing.
  • the outer ring has a flange portion only on one axial side of the cylindrical portion, and has an inward flange portion extending radially inward on the other axial side of the cylindrical portion.
  • the first portion extending radially inward from the end of the cylindrical portion of the outer ring, and the second portion extending radially outward from the radially inner end of the first portion;
  • the seal member is held by the flange portion having. Therefore, the seal member can be reinforced by the flange portion of the outer ring without providing a separate cored bar.
  • FIG. 1 is a cross-sectional view schematically showing a configuration of a roller bearing 4 according to the present embodiment.
  • FIG. 2 is a partial cross-sectional view showing an enlarged region II of FIG.
  • the roller bearing 4 is a shell-type roller bearing housed in a cylindrical hole of the housing 1, and includes a shell-type outer ring (hereinafter abbreviated as “outer ring”) 5 and a plurality of rollers. 6 and an annular seal member 7.
  • outer ring shell-type outer ring
  • the center line of the roller bearing 4 is indicated by a one-dot chain line.
  • axial direction the direction along the center line of the roller bearing 4
  • radial direction the direction orthogonal to the center line of the roller bearing 4
  • the outer ring 5 is press-fitted into the hole portion of the housing 1 and has a cylindrical portion 51 and a pair of flange portions 52 and 53 provided at both ends of the cylindrical portion 51 in the axial direction.
  • the inner peripheral surface of the cylindrical portion 51 constitutes the raceway surface of the roller 6.
  • the flange portion 52 on one axial side (the left side in the drawing) of the pair of flange portions 52, 53 is a first portion extending radially inward from the end portion of the cylindrical portion 51. 52a and a second portion 52b extending outward in the axial direction from the radially inner end of the first portion 52a.
  • the flange portion 53 on the other axial side (the right side in the drawing) of the pair of flange portions 52 and 53 corresponds to an inward flange of a general shell-shaped outer ring, and extends straight inward in the radial direction.
  • the general flange-shaped flange portion 53 is referred to as an “inward flange portion 53” in order to easily distinguish the flange portions 52 and 53.
  • the first portion 52 a of the flange portion 52 is disposed substantially parallel to the inward flange portion 53. That is, the first portion 52a extends in the radial direction so that the angle with the cylindrical portion 51 is substantially a right angle.
  • the first portion 52 a and the inward flange portion 53 of the flange portion 52 face the end surface of the roller 6.
  • the second portion 52 b of the flange portion 52 is disposed substantially parallel to the cylindrical portion 51. That is, the second portion 52b extends in the axial direction so that the angle with the first portion 52a is substantially a right angle.
  • the boundary part between the cylindrical part 51 and the first part 52a and the boundary part between the first part 52a and the second part 52b are R-shaped for processing.
  • the plate thickness D13 of the second portion 52b is preferably equal to or less than the plate thickness D12 of the first portion 52a.
  • the plate thickness D12 of the first portion 52a may be the same as or greater than the plate thickness D11 of the cylindrical portion 51.
  • the plurality of rollers 6 roll on the raceway surface of the outer ring 5 and rotatably support the rotating shaft 2.
  • the roller 6 is a needle roller. That is, the roller bearing 4 according to the present embodiment is a shell needle roller bearing.
  • the rotating element that is rotatably supported by the plurality of rollers 6 is not limited to the rotating shaft 2 and may be an inner ring (not shown) provided in the roller bearing 4.
  • the roller bearing 4, the rotating shaft 2 supported by the roller bearing 4, and the housing 1 constitute a rotating shaft support structure.
  • the plurality of rollers 6 are held by the cage 60.
  • the cage 60 has a plurality of pockets for accommodating the plurality of rollers 6 respectively. Since the plurality of pockets are provided at regular intervals in the circumferential direction, the distance between the plurality of rollers 6 is kept constant by the cage 60.
  • the cage 60 faces the radially inner end portion of the first portion 52a of the flange portion 52 in the axial direction.
  • the seal member 7 is held by the flange portion 52 and includes at least a lip 74 that is in sliding contact with the rotating shaft 2.
  • the seal member 7 is sandwiched between the outer peripheral surface of the rotating shaft 2 and the inner peripheral surface of the housing 1 and is disposed so as to surround the second portion 52 b of the flange portion 52. Further, the entire seal member 7 is disposed on the outer side in the axial direction than the first portion 52 a of the flange portion 52.
  • the seal member 7 is an elastic body, and examples of the material thereof include nitrile rubber, acrylic rubber, silicone rubber, and fluorine rubber. A specific configuration example of the seal member 7 will be described later. In the present embodiment, no seal member is disposed on the inward flange portion 53 side.
  • the (minimum) inner diameter dimension D1 of the second portion 52b of the flange portion 52 is smaller than the outer diameter dimension D2 of the cage 60. Therefore, movement (detachment) of the roller 6 and the cage 60 to one side in the axial direction is restricted by the flange portion 52.
  • the flange part 52 is arrange
  • the outer ring 5 As a manufacturing method of the outer ring 5, for example, there is a method of increasing hardness by heat treatment after cold-rolling steel sheet is drawn by a press. In this case, after punching the center part of the bottom part of the cup formed by drawing, the second part of the flange part 52 is subjected to burring while thinning the inner peripheral side part of the annular bottom part. 52b is formed. The remaining portion of the annular bottom portion, that is, the outer peripheral side portion corresponds to the first portion 52 a of the flange portion 52.
  • the elastic restoration after the plastic processing can be prevented by performing the ironing simultaneously with the burring.
  • the angle and the plate thickness of the second portion 52b of the flange portion 52 can be stabilized, so that the mounting performance of the seal member 7 is improved, the rigidity of the seal member 7 is stabilized, and the seal member 7 is sealed. It is possible to stabilize the stopping force.
  • the inward flange portion 53 can be formed by bending.
  • the inward flange portion 53 may be thinner than the cylindrical portion 51 in order to facilitate bending.
  • the formation method of the flange part 52 is not limited to an above-described burring process.
  • a method may be employed in which a cup bottom including the first portion 52a and the second portion 52b is formed at the time of drawing and the center portion of the cup bottom is punched out with a mold.
  • the manufacturing method of the outer ring 5 is not limited to the drawing process as described above, and may be manufactured by cutting the outer ring from a steel material.
  • the thickness of the second portion 52b of the flange portion 52 is not particularly limited.
  • the cage 60 for example, there is a method of punching a pocket from a rolled steel plate, bending the rolled steel plate into an annular shape, and welding the end portions. According to this manufacturing method, the manufacturing cost of the cage 60 can be suppressed.
  • the annular shape may be drawn by pressing, or may be manufactured by cutting a steel pipe.
  • the material of the cage 60 is not limited to metal, and may be resin.
  • the seal member 7 is disposed between the outer peripheral surface of the rotary shaft 2 and the inner peripheral surface of the housing 1 so as to surround the second portion 52 b of the flange portion 52. Therefore, the seal member 7 includes an inner diameter side seal portion 71 positioned between the outer peripheral surface of the rotary shaft 2 and the second portion 52 b of the flange portion 52, and the inner peripheral surface of the housing 1 and the second portion of the flange portion 52. And an outer diameter side seal portion 72 located between the portion 52b. The inner diameter side seal portion 71 and the outer diameter side seal portion 72 are integrally connected by an outer seal portion 73 located on the outer side in the axial direction than the second portion 52 b of the flange portion 52.
  • the inner diameter side seal portion 71 is disposed in close contact with the inner diameter surface of the second portion 52 b of the flange portion 52.
  • the inner diameter side seal portion 71 does not overlap with the first portion 52a of the flange portion 52 in the axial direction position. That is, the inner diameter side seal portion 71 is disposed offset in the axial direction to the outside of the position of the first portion 52a.
  • the base portion 74b of the lip 74 is included in the inner diameter side seal portion 71, and the lip 74 extends obliquely outward in the axial direction.
  • the outer diameter side seal portion 72 is in close contact with both the inner peripheral surface of the housing 1 and the outer diameter surface of the second portion 52b. In addition, at least a part of the axial inner surface of the outer diameter side seal portion 72 is in close contact with the axial outer surface of the first portion 52 a of the flange portion 52.
  • the outer seal portion 73 is in close contact with the axially outer end surface of the second portion 52b, and is in close contact with the inner peripheral surface of the housing 1 together with the outer diameter side seal portion 72.
  • the entire second portion 52 b of the flange portion 52 is in a state of entering the inside of the seal member 7. Further, the second portion 52 b of the flange portion 52 extends outward in the axial direction from the axial position (position of the axial outer edge) L of the base portion 74 b of the lip 74. Thereby, according to this Embodiment, the 2nd part 52b of the flange part 52 can be functioned as a metal core of the sealing member 7.
  • the contact force of the lip 74 of the seal member 7 to the rotating shaft 2 and the contact force of the outer diameter side seal portion 72 of the seal member 7 to the housing 1 can be increased.
  • the sealing force of the sealing member 7 can be increased as in the case where the core member is provided on the sealing member.
  • the manufacturing cost of the sealing member 7 it is not necessary to incorporate a cored bar in the sealing member 7 itself, so that the manufacturing cost of the sealing member 7 can be reduced.
  • a part of the flange portion 52 of the outer ring 5 that is a shell-shaped outer ring fulfills the function of a metal core, the manufacturing cost of the roller bearing 4 as a whole can be reduced.
  • the seal member 7 since the inner diameter side seal portion 71 is arranged without protruding inward in the axial direction from the position of the first portion 52 a of the flange portion 52, the seal member 7 does not come into contact with the cage 60. . Therefore, wear of the seal member 7 can be prevented.
  • the seal member 7 may further include one or more lips in addition to the lip 74 described above. That is, the seal member 7 may have a plurality of lips. For example, by providing a lip (not shown) on the outer peripheral surface of the seal member 7, the contact force of the seal member 7 on the housing 1 side can be more sufficiently increased. Even in this case, it is desirable that the axial position of the base portion of the lip is positioned on the inner side in the axial direction than the tip position of the second portion 52b of the flange portion 52.
  • the seal member 7 may be held by increasing the surface roughness of the flange portion 52, or a part of the flange portion 52 may be narrowed to reduce the seal member. 7 may be hooked and held. Or you may provide a protrusion with a burr in the part which contacts the flange part 52 of the sealing member 7, and may prevent it from coming off.
  • the seal member 7 may be fixed using an adhesive, or the seal member 7 including the outer ring 5 may be injection-molded. Is not limited.
  • the shape of the flange portion 52 of the outer ring 5 is not limited to the shape as shown in FIG.
  • the second portion 52b of the flange portion 52A may be slightly inclined.
  • the second portion 52b of the flange portion 52A is slightly inclined so that its inner diameter dimension gradually increases toward the outer side in the axial direction.
  • the first portion 52a of the outer ring 5 may be slightly inclined.
  • the shape of the seal member 7 held by the flange portion 52 of the outer ring 5 is not limited to the shape shown in FIG.
  • the seal member 7 ⁇ / b> A may not have the outer diameter side seal portion 72 shown in FIG. 2.
  • the seal member 7A can be reinforced by the flange portion 52 of the outer ring 5 by bonding the inner diameter side seal portion 71 to the inner diameter surface of the second portion 52b.
  • adhesion of the seal member 7A to the flange portion 52 may be realized by, for example, an adhesive, or may be realized by heat welding.
  • the seal member 7 ⁇ / b> B may not include not only the outer diameter side seal portion 72 but also the outer seal portion 73.
  • the entire lip 74 is included in the inner diameter side seal portion 71, and the tip end portion 74 a of the lip 74 is pressed against the outer peripheral surface of the rotating shaft 2 by the second portion 52 b of the flange portion 52.
  • the seal member 7 ⁇ / b> C may not include the inner diameter side seal portion 71 illustrated in FIG. 2. In this case, the entire lip 74 is included in the outer seal portion 73. Also in this example, the seal member 7C can be reinforced by the flange portion 52 of the outer ring 5 by bonding the outer diameter side seal portion 72 to the outer diameter surface of the second portion 52b.
  • the seal member 7D is arranged so as to surround the second portion 52b of the flange portion 52, the seal shape around the second portion 52b of the flange portion 52 is appropriately set. It may be changed. Thereby, the contact force of the seal member 7D with respect to the housing 1 side and the rotating shaft 2 side can be adjusted, and the fitting (attachment) of the seal member 7D to the second portion 52b of the flange portion 52 can be simplified.
  • the entire lip 74 is included in the outer seal portion 73, at least the root portion 74 b of the lip 74 is included in the inner diameter side seal portion 71 as shown in FIG.
  • the radial dimension from the base 74b to the tip 74a of the lip 74 can be increased. Therefore, from the viewpoint of improving the strength of the lip 74 and the workability of the seal member, it is desirable that the entire lip 74 is included in the outer seal portion 73.
  • FIG. 8 schematically shows another example of the shape of the seal member configured so that the entire lip 74 is included in the outer seal portion 73.
  • a seal member 7E shown in FIG. 8 includes an outer diameter side seal portion 72A and an outer seal portion 73A, similarly to the seal member 7C shown in FIG.
  • the outer diameter side seal portion 72A corresponds to a region (first region) of the seal member 7E disposed between the inner peripheral surface of the housing 1 and the second portion 52b of the flange portion 52 of the outer ring 5.
  • the outer seal portion 73A is located on the outer side in the axial direction than the second portion 52b of the flange portion 52 of the outer ring 5 in the seal member 7E, and is between the inner peripheral surface of the housing 1 and the outer peripheral surface of the rotary shaft 2. This corresponds to the area (second area) to be arranged.
  • the outer-diameter side seal portion 72A and the outer-side seal portion 73A are integrally formed continuously in the axial direction.
  • the outer diameter side seal portion 72A contacts (surface contact) with the outer peripheral surface of the second portion 52b of the flange portion 52, and also contacts (surface contact) with the axially outer surface of the first portion 52a of the flange portion 52. Placed in the state. Note that the outer diameter side seal portion 72A may not be in contact with the axially outer surface of the first portion 52a.
  • the outer seal portion 73A includes a main body portion 75 that is positioned radially outward from the position of the inner peripheral surface of the outer diameter side seal portion 72A (the position of the outer peripheral surface of the second portion 52b of the flange portion 52), Projecting radially inward from the position of the inner peripheral surface of the seal portion 72A and facing the end surface 52c of the second portion 52b of the flange portion 52, and the axial direction from the radially inner end of the facing portion 76 And a lip 74 extending outward (obliquely).
  • the base portion 74 b of the lip 74 is disposed within the thickness range of the second portion 52 b of the flange portion 52.
  • a base portion 74 b of the lip 74 is included in the facing portion 76. Note that the lip 74 may extend obliquely from the radially inner end of the main body 75 toward the axially outer side.
  • the facing portion 76 of the outer seal portion 73 ⁇ / b> A is not in contact with the end surface 52 c of the second portion 52 b of the flange portion 52. In this respect, it is greatly different from the seal member 7C shown in FIG.
  • the axial length L1 from the position of the axially inner end face of the outer diameter side seal portion 72A to the facing portion 76 of the outer seal portion 73A is the axial length of the second portion 52b of the flange portion 52. Longer than L2.
  • the axial length L2 corresponds to the axial length of the second portion 52b starting from the position of the outer surface of the first portion 52a of the flange portion 52.
  • a gap C is formed between the end surface 52c of the flange portion 52 and the facing portion 76 of the outer seal portion 73A (that is, the root portion 74b of the lip 74).
  • the gap C is exaggerated from the viewpoint of facilitating understanding.
  • the difference between the axial lengths L1 and L2 is preferably 0.1 mm or more. That is, the difference between the axial lengths L1 and L2 is preferably 1/20 or more of the interval L12. In consideration of the axial dimension of the entire seal member 7E, the difference between the axial lengths L1 and L2 is preferably 1/10 or less (0.2 mm or less) of the distance L12.
  • the main body portion 75 of the outer seal portion 73A has a protruding portion 77 that protrudes outward in the axial direction from the position of the base portion 74b of the lip 74.
  • the overhanging portion 77 is a portion that faces the outer diameter surface of the lip 74 and receives a reaction force of the lip 74.
  • the outer peripheral surface of the main body 75 including the overhanging portion 77 is disposed in close contact with the inner peripheral surface of the housing 1.
  • the outer peripheral surface of the main body 75 of the outer seal portion 73 forms one cylindrical surface together with the outer peripheral surface of the outer diameter side seal portion 72A.
  • the radial thickness dimension L13 of the overhanging portion 77 is larger than the radial thickness dimension (radial dimension from the root portion 74b to the tip portion 74a) L14 of the lip 74.
  • the strength of the overhanging portion 77 is higher than the strength of the lip 74, so that the deformation of the overhanging portion 77 hardly affects the deformation of the lip 74.
  • the thickness dimension L13 of the protruding portion 77 may be smaller than the thickness dimension L11 of the outer diameter side seal portion 72A. Thereby, the cross-sectional shape of the main-body part 75 becomes a substantially L shape.
  • a space between the projecting portion 77 and the lip 74 is surrounded by an inner peripheral surface of the projecting portion 77, an outer diameter surface of the lip 74, and an annular surface 75a facing outward in the axial direction.
  • a space S is formed.
  • the annular surface 75 a is a surface that extends in the radial direction and has a base portion 74 b of the lip 74 as an inner periphery and an axially inner end edge of the inner peripheral surface of the projecting portion 77 as an outer periphery.
  • the annular surface 75a may be an orthogonal surface orthogonal to the axial direction, or may be a tapered surface that expands toward the outer periphery.
  • the outer diameter side seal portion 72A is in surface contact with the outer surface of the first portion 52a of the flange portion 52.
  • the inner diameter surface of the side seal portion 72 ⁇ / b> A is in surface contact with the outer diameter surface of the second portion 52 b of the flange portion 52.
  • the seal member 7E has a tightening margin on the outer peripheral side. As a result, the seal member 7E is sandwiched between the inner peripheral surface of the housing 1 and the second portion 52b of the flange portion 52. Therefore, also in this embodiment, the second portion 52b of the flange portion 52 is inserted into the seal member 7E. It can function as a metal core.
  • the outer diameter side seal portion 72A is provided on the outer surface of the first portion 52a of the flange portion 52 and the outer diameter surface of the second portion 52b of the flange portion 52. It is desirable to fix to at least one of them by a known method (adhesion with an adhesive, heat fusion, etc.).
  • a gap C is provided between the base portion 74 b of the lip 74 and the end surface 52 c of the flange portion 52.
  • the base portion 74 b of the lip 74 does not hit the end surface 52 c of the flange portion 52. Therefore, even when the thickness of the second portion 52b of the flange portion 52 is thin, the deformation of the second portion 52b due to the pressure from the outside in the axial direction can be prevented.
  • the seal member 7E by preventing the seal member 7E from coming into contact with the end surface 52c of the flange portion 52, damage to the seal member 7E can be prevented even when the entire end surface 52c is not a smooth surface.
  • the outer ring 5 is formed by press shearing, in the process of punching the center part of the bottom of the cup with a punch (jig), a severely broken surface and burrs are generated on the cut surface of the bottom of the cup. Is done. Therefore, the outer surface 52f of the first portion 52a of the flange portion 52 and the outer diameter surface of the second portion 52b are smooth surfaces, whereas the end surface of the second portion 52b is shown in FIG.
  • the fracture surface 52d and the burr 52e remain in 52c.
  • the burr 52e is formed at a corner on the outer diameter side of the end face 52c. In FIG. 9, the unevenness of the fracture surface 52d and the burr 52e are exaggerated.
  • the facing portion 76 including the base portion 74b of the lip 74 does not abut against the end surface 52c of the flange portion 52. Even at times, the seal member 7E can be prevented from being damaged. Further, the force from the outside in the axial direction applied to the outer end surface in the axial direction of the main body portion 75 of the outer seal portion 73A is directed inward in the axial direction and is received by the outer surface of the first portion 52a of the flange portion 52.
  • the seal member 7E has a structure that is less likely to transmit force to the lip 74 than the seal member 7C shown in FIG. Thereby, since the lip 74 can be stably brought into contact with the rotating shaft 2, an increase in the operating torque of the rotating shaft 2 can be prevented.
  • the seal member (7 or 7A,..., 7E) described above is disposed in surface contact with at least one of the outer diameter surface and the inner diameter surface of the second portion 52b of the flange portion 52. There is an advantage that the seal member can be easily aligned with respect to the center.
  • the raceway surface (cylindrical surface) is caused by anisotropy or heat treatment strain of the thin steel strip.
  • the roundness of the inner peripheral surface of the portion increases.
  • the outer diameter of the cylindrical portion of the outer ring is manufactured to be larger than the diameter of the inner peripheral surface of the housing 1, and the cylindrical portion is deformed by the pressure received from the housing 1 when press-fitted into the housing 1. There is. Therefore, it is difficult to use the raceway surface of the shell-shaped outer ring as a reference surface for alignment of the seal member.
  • the flange portion 52 of the outer ring 5 has the second portion 52b that is disposed away from the inner peripheral surface of the housing 1 in the attached state.
  • the outer diameter surface or inner diameter surface of 52b can be used as a reference surface for alignment of the seal member.
  • the comparison is made. High strength. Therefore, even if heat treatment is performed during manufacture of the outer ring 5 according to the present embodiment, there is a low possibility of distortion occurring on the outer diameter surface or inner diameter surface of the second portion 52b.
  • the axis of the outer diameter surface or inner diameter surface of the second portion 52b of the flange portion 52 is used as a housing. What is necessary is just to be arrange
  • the axis J2 of the outer diameter surface or inner diameter surface of the second portion 52b of the flange portion 52 is ideally coincident with the axis J1 of the inner peripheral surface of the housing 1, it is inside the virtual circle. It only has to be arranged.
  • the thickness of the second portion 52b is preferably equal to or greater than the thickness of the cylindrical portion 51.
  • the thickness of the second portion 52b may be equal to or greater than the thickness of the first portion 52a.
  • both the first portion 52a and the second portion 52b may be larger than the thickness of the inward flange portion 53 shown in FIG.
  • the inner diameter dimension of the second portion 52 b may be smaller than the inner diameter dimension of the inward flange portion 53.
  • the processing of the flange portion 52 can be performed as follows. That is, when the outer peripheral surface and the inner peripheral surface of the cylindrical portion 51 are pressed, the second portion 52b of the flange portion 52 is processed at the same time, and the second portion 52 is constrained in the mold.
  • the flange portion 52 may be manufactured so that the shaft center of 52b and the shaft center of the cylindrical portion 51 are aligned.
  • roller bearing 4 can be applied to a fluid control valve such as an EGR (Exhaust Gas Recirculation) control valve. That is, the roller bearing 4 is a roller bearing for an EGR control valve.
  • EGR exhaust Gas Recirculation
  • FIG. 10 is a schematic cross-sectional view schematically showing a main part of an EGR control valve to which the roller bearing 4 according to the present embodiment is applied.
  • the EGR control valve re-opens the exhaust passage from the exhaust passage to the intake passage through the exhaust gas passage 11 by changing the opening area of the exhaust gas passage 11 formed inside the housing 1 continuously or stepwise.
  • This is an exhaust gas flow rate control valve (exhaust throttle valve) that variably controls the flow rate of exhaust gas that is circulated (refluxed).
  • the housing 1 is provided with a cylindrical hole 12 that intersects with the exhaust gas flow path 11, and the rotation shaft 2 and a support mechanism that rotatably supports the rotation shaft 2 are accommodated in the hole 12. Is done.
  • the hole 12 of the housing 1 includes a central hole 12a located at the center in the axial direction, a small-diameter hole 12b located on one axial side (left side of the paper) of the central hole 12a and having a smaller diameter than the central hole 12a. And a large-diameter hole portion 12c which is located on the other axial side of the central hole portion 12a (on the right side in the drawing) and has a larger diameter than the central hole portion 12a.
  • the rotating shaft 2 includes a large diameter portion 21 supported by a support mechanism, and a small diameter portion 22 which is smaller in diameter than the large diameter portion 21 and is located adjacent to one side in the axial direction of the large diameter portion 21. Yes.
  • the tip of the small diameter portion 22 protrudes to the gas flow path 11 and is connected and fixed to the valve body 13 in the gas flow path 11.
  • the large-diameter portion 21 of the rotary shaft 2 is accommodated in the central hole portion 12a and the large-diameter hole portion 12c of the housing 1, and the other axial end portion of the small-diameter portion 22 of the rotary shaft 2 is accommodated in the small-diameter hole portion 12b of the housing 1. Contained.
  • the axis of the rotating shaft 2 is indicated by a one-dot chain line.
  • the valve element 13 has a circular shape in plan view.
  • the posture (position) of the valve body 13 is changed between the fully closed position and the fully open position according to the rotation angle of the rotary shaft 2.
  • the valve element 13 in the fully closed position is indicated by a solid line
  • the valve element 13 in the fully open position is indicated by an imaginary line (two-dot chain line).
  • the exhaust gas flow path 11 has a flow path 11a on the exhaust passage side and a flow path 11b on the intake passage side, and the exhaust gas flows from the flow path 11a side to the flow path 11b side.
  • the flow path 11a has a larger diameter (inner diameter) than the flow path 11b, and a step portion 11c is provided between the flow paths 11a and 11b.
  • the diameter (outer diameter) of the valve body 13 is smaller than the diameter of the flow path 11a and larger than the diameter of the flow path 11b.
  • valve body 13 When the valve body 13 is located at the fully closed position, the valve body 13 is fitted into the step portion 11 c of the exhaust gas passage 11. As a result, the annular gap between the inner peripheral surface of the exhaust gas passage 11 and the outer peripheral end surface of the valve body 13 is completely sealed. In this case, the exhaust gas is not mixed into clean intake air (fresh air) that has passed through the air cleaner.
  • the outer peripheral portion of the valve body 13 does not contact the stepped portion 11c of the gas flow path 11.
  • the exhaust gas is mixed into clean intake air (fresh air) that has passed through the air cleaner.
  • the support mechanism includes one ball bearing 3 and one roller bearing 4 described above.
  • the ball bearing 3 and the roller bearing 4 support the large-diameter portion 21 of the rotating shaft 2 so as to be rotatable with respect to the housing 1.
  • the support mechanism includes not only the roller bearing 4 but also the ball bearing 3, the axial position of the rotating shaft 2 is fixed.
  • the ball bearing 3, the roller bearing 4, the rotating shaft 2 supported by these bearings 3 and 4, and the housing 1 constitute a rotating shaft support structure.
  • the outer diameter of the ball bearing 3 is larger than the outer diameter of the roller bearing 4.
  • the ball bearing 3 is press-fitted into the large-diameter hole 12 c of the housing 1, and the roller bearing 4 is press-fitted into the central hole 12 a of the housing 1.
  • the roller bearing 4 is provided closer to the exhaust gas flow path 11 than the ball bearing 3.
  • the exhaust gas in the exhaust gas passage 11 is caused by an annular gap between the inner peripheral surface of the hole portion 12 (small diameter hole portion 12b) of the housing 1 and the outer peripheral surface of the small diameter portion 22 of the rotary shaft 2. 14 is assumed to enter the central hole portion 12a in which the roller bearing 4 is disposed. Since the roller bearing 4 includes the seal member 7 (7A, 7B, 7C, 7D, 7E) at the end on the gas flow path 11 side, the exhaust gas as a corrosive fluid enters the roller bearing 4. This can be prevented.
  • seal member 7 is reinforced by the second portion 52b of the flange portion 52 of the outer ring 5, according to the present embodiment, the fluid sealing performance by the seal member 7 can be enhanced. Therefore, even the high-pressure fluid can be properly sealed by the seal member 7.
  • the roller bearing 4 when the roller bearing 4 is provided with the seal member 7 for sealing the exhaust gas, it is not necessary to provide a separate seal member that is disposed away from the bearing. Therefore, the axial length of the support mechanism can be shortened as compared with the configuration in which the rotary shaft is rotatably supported by the double ball bearings. As a result, since the housing 1 can be made compact, the EGR control valve can be downsized.
  • roller bearing 4 is not limited to the EGR control valve of an automobile.
  • the fluid control valve to which the roller bearing 4 can be applied includes, for example, i) an intake flow rate control valve such as an electronically controlled throttle valve of an automobile, ii) a low-temperature exhaust gas passage installed on the outlet side of the exhaust gas recirculation cooler, Exhaust gas flow path switching valve for switching a bypass flow path (high temperature exhaust gas flow path) for bypassing the circulating exhaust gas from the exhaust gas recirculation cooler, iii) Exhaust gas flow rate installed in the exhaust pipe of the engine (turbo housing of the turbocharger) (Pressure) control valve.
  • the roller bearing 4 may be applied to other types of exhaust control valves such as an exhaust throttle valve or an exhaust brake valve.
  • the fluid control valve to which the roller bearing 4 is applied may be a control valve of a vehicle or a device other than an automobile.
  • a control valve of a vehicle for example, an air control valve of a fuel cell can be mentioned.
  • the seal member 7 is provided only on one side of the roller bearing 4 in the axial direction.
  • the seal member 8 is a known seal member that is disposed inside the inward flange portion 53 so as to face the roller 6. In this case, grease can be filled inside the bearing.
  • a grease that can be used in a high temperature environment such as urea grease or fluorine grease.
  • the seal member 8 on the other side may come into contact with the cage 60, but at least as compared with the configuration in which both seal members can contact the cage 60. There is an advantage that wear of one seal member 7 can be prevented.
  • the roller bearing may not include the cage 60.
  • the movement of the roller 6 to one side in the axial direction is restricted by the flange portion 52 of the outer ring 5. Therefore, since the seal member 7 does not contact the roller 6, wear of the seal member 7 due to contact with the roller 6 can be prevented.
  • wheel of the roller bearing may have the flange part which can hold
  • the flange itself may not be provided on the other axial side of the outer ring of the roller bearing. That is, the outer ring may have a flange as the flange portion 52 only at one end portion in the axial direction. That is, the roller bearing may be a cylindrical roller bearing instead of a shell roller bearing.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

A roller bearing (4) is provided with: an outer ring (5) having a cylinder part (51), an internal peripheral surface of which constitutes part of a raceway surface, and a flange part (52) connected at least to one end part in the axial direction of the cylinder part (51); a plurality of rollers (6) for rolling on the raceway surface of the cylinder part (51) and rotatably supporting a rotating element (2); and a seal member (7) retained by the flange part (52). The flange part (52) has a first portion (52a) extending toward the inside in the radial direction from an end part of the cylinder part (51), and a second portion (52b) extending toward the outside in the axial direction from a radially inside end part of the first portion (52a).

Description

ころ軸受Roller bearing
 本発明は、ころ軸受に関し、特に、シール部材を備えたころ軸受に関する。 The present invention relates to a roller bearing, and more particularly to a roller bearing provided with a seal member.
 従来から、軸受内部への潤滑油の封止、または、外部からの流体や異物の侵入防止を目的として、シール部材を備えたころ軸受が存在する。 Conventionally, there is a roller bearing provided with a seal member for the purpose of sealing lubricating oil inside the bearing or preventing intrusion of fluid or foreign matter from the outside.
 たとえば米国特許第9388772号明細書(特許文献1)では、径方向内側に延びる鍔を有さない円筒状の外輪の軸方向両端部に薄肉の縁部が設けられ、この薄肉の縁部に、略S形断面形状のシール部材が嵌め込まれている。この針状ころ軸受は、内燃機関(エンジン)の流体制御弁のハウジング内に嵌め入れられており、略S形断面形状のシール部材がハウジングに密着して配置されることで、流体(排気ガス)が軸受内部に侵入することを防止している。 For example, in U.S. Pat.No. 9,388,772 (Patent Document 1), thin edge portions are provided at both axial end portions of a cylindrical outer ring that does not have a flange extending radially inward. A seal member having a substantially S-shaped cross section is fitted. This needle roller bearing is fitted in a housing of a fluid control valve of an internal combustion engine (engine), and a seal member having a substantially S-shaped cross section is disposed in close contact with the housing, thereby allowing fluid (exhaust gas). ) Is prevented from entering the bearing.
米国特許第9388772号明細書U.S. Pat. No. 9,388,772
 ころ軸受に備えられるシール部材を補強するために、シール部材に芯金を設けることがある。しかしながら、芯金入りのシール部材とするためには、シール部材の製造コストが上昇する。そのため、シール部材に芯金を設ける場合、ころ軸受の製造コストが上昇してしまうという問題がある。 ¡In order to reinforce the seal member provided in the roller bearing, a metal core may be provided on the seal member. However, in order to obtain a sealing member with a cored bar, the manufacturing cost of the sealing member increases. Therefore, when a core metal is provided on the seal member, there is a problem that the manufacturing cost of the roller bearing increases.
 また、特許文献1のころ軸受においては、略S形断面形状のシール部材によって、軸方向外側に向かって延びる外輪の縁部が囲まれているに過ぎず、シール部材の補強のためには、別途補強金具が必要となる。 Further, in the roller bearing of Patent Document 1, the edge of the outer ring extending toward the outside in the axial direction is only surrounded by the seal member having a substantially S-shaped cross section, and for reinforcing the seal member, A separate reinforcing bracket is required.
 また、特許文献1において外輪の両端部に設けられた薄肉の縁部は、外輪の軌道面よりも径方向外側に配置されていることから、ころおよび保持器の軸方向移動(離脱)は、シール部材によって規制される。したがって、ころまたは保持器との接触によってシール部材が摩耗するおそれがある。 In addition, since the thin edge portions provided at both ends of the outer ring in Patent Document 1 are disposed radially outside the raceway surface of the outer ring, the axial movement (detachment) of the rollers and the cage is as follows. It is regulated by the seal member. Therefore, the seal member may be worn by contact with the rollers or the cage.
 本発明は、上記のような課題を解決するためになされたものであって、その目的は、芯金を設けることなくシール部材を補強するとともに、シール部材の摩耗を防止することのできる好適なころ軸受を提供することである。 The present invention has been made in order to solve the above-described problems, and an object of the present invention is to reinforce the seal member without providing a cored bar and to prevent wear of the seal member. It is to provide a roller bearing.
 この発明のある局面に従うころ軸受は、外輪と、複数のころと、シール部材とを備える。外輪は、内周面が軌道面を構成する円筒部と、円筒部の少なくとも軸方向一方端部に連結されたフランジ部とを有する。複数のころは、円筒部の軌道面上を転動し、回転要素を回転自在に支持する。シール部材は、フランジ部によって保持されている。フランジ部は、円筒部の端部から径方向内側に向かって延びる第1の部分と、第1の部分の径方向内側端部から軸方向外側に向かって延びる第2の部分とを有する。 The roller bearing according to an aspect of the present invention includes an outer ring, a plurality of rollers, and a seal member. The outer ring has a cylindrical portion whose inner peripheral surface forms a raceway surface, and a flange portion connected to at least one axial end of the cylindrical portion. The plurality of rollers roll on the raceway surface of the cylindrical portion, and rotatably support the rotating element. The seal member is held by the flange portion. The flange portion includes a first portion extending radially inward from the end of the cylindrical portion, and a second portion extending axially outward from the radially inner end of the first portion.
 ころ軸受は、ころを収容する保持器をさらに備えていてもよい。この場合、フランジ部は、保持器の軸方向移動を規制するように配置されていることが望ましい。 The roller bearing may further include a cage that accommodates the roller. In this case, it is desirable that the flange portion be disposed so as to restrict the axial movement of the cage.
 具体的には、保持器は、フランジ部の第1の部分のうちの径方向内側端部と軸方向に対向していることが望ましい。 Specifically, it is desirable that the cage is opposed to the radially inner end of the first portion of the flange portion in the axial direction.
 好ましくは、シール部材は、回転要素の外周面とフランジ部の第2の部分との間に配置される内径側シール部を含む。 Preferably, the seal member includes an inner diameter side seal portion disposed between the outer peripheral surface of the rotating element and the second portion of the flange portion.
 外輪がハウジング内に嵌め入れられている場合、シール部材は、ハウジングの内周面とフランジ部の第2の部分との間に配置される外径側シール部を含むことが望ましい。 When the outer ring is fitted in the housing, the seal member preferably includes an outer diameter side seal portion disposed between the inner peripheral surface of the housing and the second portion of the flange portion.
 外輪がハウジング内に嵌め入れられている場合、シール部材は、回転要素の外周面とハウジングの内周面との間において、フランジ部の第2の部分を取り囲むように配置されていることがより望ましい。 When the outer ring is fitted in the housing, the seal member may be disposed so as to surround the second portion of the flange portion between the outer peripheral surface of the rotating element and the inner peripheral surface of the housing. desirable.
 好ましくは、フランジ部の第2の部分の板厚は、第1の部分の板厚以下である。 Preferably, the thickness of the second portion of the flange portion is equal to or less than the thickness of the first portion.
 好ましくは、シール部材は、回転要素の外周面に接するリップを含む。 Preferably, the seal member includes a lip in contact with the outer peripheral surface of the rotating element.
 さらに好ましくは、シール部材は、外輪が嵌め入れられるハウジングの内周面とフランジ部の第2の部分との間に配置される第1領域と、第1領域の軸方向外側に連なってハウジングの内周面と回転要素の外周面との間に配置され、回転要素の外周面に接するリップを有する第2領域とを含む。 More preferably, the seal member includes a first region disposed between an inner peripheral surface of the housing into which the outer ring is fitted and the second portion of the flange portion, and an axially outer side of the first region. A second region having a lip disposed between the inner peripheral surface and the outer peripheral surface of the rotating element and in contact with the outer peripheral surface of the rotating element.
 この場合、第1領域は、フランジ部の第1の部分の外側面に接触状態で配置され、第2領域は、フランジ部の第2の部分の軸方向外側端面と非接触状態で対面する対面部を有していることが望ましい。 In this case, the first region is disposed in contact with the outer surface of the first portion of the flange portion, and the second region faces the axially outer end surface of the second portion of the flange portion in a non-contact state. It is desirable to have a part.
 また、対面部は、リップの付け根部分を含むことが望ましい。 Also, it is desirable that the facing part includes the base part of the lip.
 好ましくは、フランジ部の第2の部分の外径面または内径面の軸線が、ハウジングの内周面の軸線を中心とした直径0.5mmの仮想円の内側に配置されている。 Preferably, the axis of the outer diameter surface or inner diameter surface of the second portion of the flange portion is disposed inside a virtual circle having a diameter of 0.5 mm centering on the axis of the inner peripheral surface of the housing.
 好ましくは、外輪は、フランジ部を円筒部の軸方向一方側にのみ有し、円筒部の軸方向他方側には、径方向内側に延びる内向きフランジ部を有している。 Preferably, the outer ring has a flange portion only on one axial side of the cylindrical portion, and has an inward flange portion extending radially inward on the other axial side of the cylindrical portion.
 本発明によれば、外輪の円筒部の端部から径方向内側に向かって延びる第1の部分と、第1の部分の径方向内側端部から軸方向外側に向かって延びる第2の部分とを有するフランジ部によって、シール部材が保持される。したがって、芯金を別途設けなくても、外輪のフランジ部によってシール部材を補強することが可能となる。 According to the present invention, the first portion extending radially inward from the end of the cylindrical portion of the outer ring, and the second portion extending radially outward from the radially inner end of the first portion; The seal member is held by the flange portion having. Therefore, the seal member can be reinforced by the flange portion of the outer ring without providing a separate cored bar.
 また、本発明の一態様によれば、外輪のフランジ部によって、ころまたは保持器の軸方向移動が規制されるため、ころまたは保持器との接触によるシール部材の摩耗を防止することができる。 Further, according to one aspect of the present invention, since the axial movement of the roller or the cage is restricted by the flange portion of the outer ring, it is possible to prevent wear of the seal member due to contact with the roller or the cage.
本発明の実施の形態に係るころ軸受の構成を模式的に示す断面図である。It is sectional drawing which shows typically the structure of the roller bearing which concerns on embodiment of this invention. 図1の領域IIを拡大して示す部分断面図である。It is a fragmentary sectional view which expands and shows the area | region II of FIG. 外輪のフランジ部の他の形状例を模式的に示す部分断面図である。It is a fragmentary sectional view showing typically other shape examples of a flange part of an outer ring. 外輪のフランジ部に保持されるシール部材の他の形状例を模式的に示す部分断面図である。It is a fragmentary sectional view showing typically another example of shape of a seal member held at a flange part of an outer ring. 外輪のフランジ部に保持されるシール部材のさらに他の形状例を模式的に示す部分断面図である。It is a fragmentary sectional view showing typically still another example of shape of a seal member held at a flange part of an outer ring. 外輪のフランジ部に保持されるシール部材のさらに他の形状例を模式的に示す部分断面図である。It is a fragmentary sectional view showing typically still another example of shape of a seal member held at a flange part of an outer ring. 外輪のフランジ部に保持されるシール部材のさらに他の形状例を模式的に示す部分断面図である。It is a fragmentary sectional view showing typically still another example of shape of a seal member held at a flange part of an outer ring. 外輪のフランジ部に保持されるシール部材のさらに他の形状例を模式的に示す部分断面図である。It is a fragmentary sectional view showing typically still another example of shape of a seal member held at a flange part of an outer ring. 外輪のフランジ部の端面の形状例を模式的に示す図である。It is a figure which shows typically the example of a shape of the end surface of the flange part of an outer ring | wheel. 本発明の実施の形態に係るころ軸受が適用されたEGR制御弁の要部を模式的に示す概略断面図である。It is a schematic sectional drawing which shows typically the principal part of the EGR control valve to which the roller bearing which concerns on embodiment of this invention was applied. 本発明の実施の形態の変形例1に係るころ軸受の構成を模式的に示す断面図である。It is sectional drawing which shows typically the structure of the roller bearing which concerns on the modification 1 of embodiment of this invention.
 本発明の実施の形態について図面を参照しながら詳細に説明する。なお、図中同一または相当部分には同一符号を付してその説明は繰返さない。 Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.
 (ころ軸受の概略構成について)
 図1および図2を参照して、本実施の形態に係るころ軸受4の概略構成について説明する。図1は、本実施の形態に係るころ軸受4の構成を模式的に示す断面図である。図2は、図1の領域IIを拡大して示す部分断面図である。
(General configuration of roller bearing)
With reference to FIG. 1 and FIG. 2, the schematic structure of the roller bearing 4 which concerns on this Embodiment is demonstrated. FIG. 1 is a cross-sectional view schematically showing a configuration of a roller bearing 4 according to the present embodiment. FIG. 2 is a partial cross-sectional view showing an enlarged region II of FIG.
 図1に示されるように、ころ軸受4は、ハウジング1の円筒状の孔部に収容されるシェル形ころ軸受であって、シェル形外輪(以下「外輪」と略す)5と、複数のころ6と、環状に形成されたシール部材7とを備える。図1には、ころ軸受4の中心線が一点鎖線で示されている。以下の説明では、ころ軸受4の中心線に沿う方向を「軸方向」、ころ軸受4の中心線に直交する方向を「径方向」という。 As shown in FIG. 1, the roller bearing 4 is a shell-type roller bearing housed in a cylindrical hole of the housing 1, and includes a shell-type outer ring (hereinafter abbreviated as “outer ring”) 5 and a plurality of rollers. 6 and an annular seal member 7. In FIG. 1, the center line of the roller bearing 4 is indicated by a one-dot chain line. In the following description, the direction along the center line of the roller bearing 4 is referred to as “axial direction”, and the direction orthogonal to the center line of the roller bearing 4 is referred to as “radial direction”.
 外輪5は、ハウジング1の孔部内に圧入され、円筒部51と、円筒部51の軸方向両端部にそれぞれ設けられた一対のフランジ部52,53とを有する。円筒部51の内周面はころ6の軌道面を構成する。 The outer ring 5 is press-fitted into the hole portion of the housing 1 and has a cylindrical portion 51 and a pair of flange portions 52 and 53 provided at both ends of the cylindrical portion 51 in the axial direction. The inner peripheral surface of the cylindrical portion 51 constitutes the raceway surface of the roller 6.
 一対のフランジ部52,53のうちの軸方向一方側(紙面左側)のフランジ部52は、図2に示されるように、円筒部51の端部から径方向内側に向かって延びる第1の部分52aと、第1の部分52aの径方向内側端部から軸方向外側に向かって延びる第2の部分52bとを有している。 As shown in FIG. 2, the flange portion 52 on one axial side (the left side in the drawing) of the pair of flange portions 52, 53 is a first portion extending radially inward from the end portion of the cylindrical portion 51. 52a and a second portion 52b extending outward in the axial direction from the radially inner end of the first portion 52a.
 一対のフランジ部52,53のうちの軸方向他方側(紙面右側)のフランジ部53は、一般的なシェル形外輪の内向きの鍔に相当し、径方向内側に向かって真っ直ぐ延びている。以下の説明において、フランジ部52,53を区別し易くするために、一般的な鍔形状のフランジ部53を「内向きフランジ部53」という。 The flange portion 53 on the other axial side (the right side in the drawing) of the pair of flange portions 52 and 53 corresponds to an inward flange of a general shell-shaped outer ring, and extends straight inward in the radial direction. In the following description, the general flange-shaped flange portion 53 is referred to as an “inward flange portion 53” in order to easily distinguish the flange portions 52 and 53.
 フランジ部52の第1の部分52aは、内向きフランジ部53と略平行に配置されている。つまり、第1の部分52aは、円筒部51との角度が略直角となるように径方向に延びている。フランジ部52の第1の部分52aおよび内向きフランジ部53は、ころ6の端面に対面している。 The first portion 52 a of the flange portion 52 is disposed substantially parallel to the inward flange portion 53. That is, the first portion 52a extends in the radial direction so that the angle with the cylindrical portion 51 is substantially a right angle. The first portion 52 a and the inward flange portion 53 of the flange portion 52 face the end surface of the roller 6.
 フランジ部52の第2の部分52bは、円筒部51と略平行に配置されている。つまり、第2の部分52bは、第1の部分52aとの角度が略直角となるように軸方向に延びている。なお、円筒部51と第1の部分52aとの境界部および第1の部分52aと第2の部分52bとの境界部は、加工上、R形状となっている。 The second portion 52 b of the flange portion 52 is disposed substantially parallel to the cylindrical portion 51. That is, the second portion 52b extends in the axial direction so that the angle with the first portion 52a is substantially a right angle. In addition, the boundary part between the cylindrical part 51 and the first part 52a and the boundary part between the first part 52a and the second part 52b are R-shaped for processing.
 第2の部分52bの板厚D13は、第1の部分52aの板厚D12以下であることが望ましい。第1の部分52aの板厚D12は、円筒部51の板厚D11と同じか、それ以上であってもよい。 The plate thickness D13 of the second portion 52b is preferably equal to or less than the plate thickness D12 of the first portion 52a. The plate thickness D12 of the first portion 52a may be the same as or greater than the plate thickness D11 of the cylindrical portion 51.
 複数のころ6は、外輪5の軌道面上を転動し、回転軸2を回転自在に支持する。ころ6は、針状ころである。すなわち、本実施の形態に係るころ軸受4は、シェル形針状ころ軸受である。なお、複数のころ6によって回転自在に支持される回転要素は、回転軸2に限定されず、ころ軸受4が備える内輪(図示せず)であってもよい。ころ軸受4と、ころ軸受4に支持される回転軸2と、ハウジング1とで、回転軸支持構造が構成される。 The plurality of rollers 6 roll on the raceway surface of the outer ring 5 and rotatably support the rotating shaft 2. The roller 6 is a needle roller. That is, the roller bearing 4 according to the present embodiment is a shell needle roller bearing. The rotating element that is rotatably supported by the plurality of rollers 6 is not limited to the rotating shaft 2 and may be an inner ring (not shown) provided in the roller bearing 4. The roller bearing 4, the rotating shaft 2 supported by the roller bearing 4, and the housing 1 constitute a rotating shaft support structure.
 回転軸2の回転トルクを減少させるために、複数のころ6は保持器60に保持されている。保持器60は、複数のころ6をそれぞれ収容する複数のポケットを有する。複数のポケットは周方向に一定間隔で設けられているため、保持器60によって複数のころ6の間隔が一定に保たれる。保持器60は、フランジ部52の第1の部分52aのうちの径方向内側端部と軸方向に対向している。 In order to reduce the rotational torque of the rotating shaft 2, the plurality of rollers 6 are held by the cage 60. The cage 60 has a plurality of pockets for accommodating the plurality of rollers 6 respectively. Since the plurality of pockets are provided at regular intervals in the circumferential direction, the distance between the plurality of rollers 6 is kept constant by the cage 60. The cage 60 faces the radially inner end portion of the first portion 52a of the flange portion 52 in the axial direction.
 シール部材7は、フランジ部52によって保持されており、少なくとも回転軸2に摺接するリップ74を含む。シール部材7は、回転軸2の外周面とハウジング1の内周面とに挟まれており、フランジ部52の第2の部分52bを取り囲むように配置されている。また、シール部材7の全体が、フランジ部52の第1の部分52aよりも軸方向外側に配置されている。 The seal member 7 is held by the flange portion 52 and includes at least a lip 74 that is in sliding contact with the rotating shaft 2. The seal member 7 is sandwiched between the outer peripheral surface of the rotating shaft 2 and the inner peripheral surface of the housing 1 and is disposed so as to surround the second portion 52 b of the flange portion 52. Further, the entire seal member 7 is disposed on the outer side in the axial direction than the first portion 52 a of the flange portion 52.
 シール部材7は、弾性体であって、その材質としては、たとえば、ニトリルゴム、アクリルゴム、シリコーンゴム、フッ素ゴムなどが挙げられる。シール部材7の具体的な構成例については後述する。なお、本実施の形態において、内向きフランジ部53側には、シール部材は配置されていない。 The seal member 7 is an elastic body, and examples of the material thereof include nitrile rubber, acrylic rubber, silicone rubber, and fluorine rubber. A specific configuration example of the seal member 7 will be described later. In the present embodiment, no seal member is disposed on the inward flange portion 53 side.
 ここで、フランジ部52の第2の部分52bの(最小)内径寸法D1は保持器60の外径寸法D2よりも小さい。そのため、フランジ部52によって、ころ6および保持器60の軸方向一方側への移動(離脱)が規制されている。具体的には、フランジ部52は、第1の部分52aにおいて保持器60と接触し得るように配置されている。なお、ころ6および保持器60の軸方向他方側への移動は、外輪5の内向きフランジ部53によって規制される。 Here, the (minimum) inner diameter dimension D1 of the second portion 52b of the flange portion 52 is smaller than the outer diameter dimension D2 of the cage 60. Therefore, movement (detachment) of the roller 6 and the cage 60 to one side in the axial direction is restricted by the flange portion 52. Specifically, the flange part 52 is arrange | positioned so that the holder | retainer 60 may be contacted in the 1st part 52a. Note that the movement of the roller 6 and the cage 60 toward the other side in the axial direction is restricted by the inward flange portion 53 of the outer ring 5.
 外輪5の製造方法としては、たとえば冷間圧延鋼板をプレスにより絞り成形した後に、熱処理により硬度を高める方法がある。この場合、絞り加工によって成形されるカップの底部の中央部分を打抜いた後に、円環状となった底部の内周側部分を薄肉にしながらバーリング加工することによって、フランジ部52の第2の部分52bが形成される。円環状の底部の残りの部分、すなわち外周側部分が、フランジ部52の第1の部分52aに相当する。 As a manufacturing method of the outer ring 5, for example, there is a method of increasing hardness by heat treatment after cold-rolling steel sheet is drawn by a press. In this case, after punching the center part of the bottom part of the cup formed by drawing, the second part of the flange part 52 is subjected to burring while thinning the inner peripheral side part of the annular bottom part. 52b is formed. The remaining portion of the annular bottom portion, that is, the outer peripheral side portion corresponds to the first portion 52 a of the flange portion 52.
 外輪5を絞り成形で加工する場合、このようにバーリング加工と同時にしごき加工を行うことにより、塑性加工後の弾性復元を防止することができる。これにより、フランジ部52の第2の部分52bの角度や板厚を安定化させることができるため、シール部材7の装着性向上、シール部材7の剛性の安定化、および、シール部材7の封止力の安定化を図ることが可能となる。 When the outer ring 5 is processed by drawing, the elastic restoration after the plastic processing can be prevented by performing the ironing simultaneously with the burring. As a result, the angle and the plate thickness of the second portion 52b of the flange portion 52 can be stabilized, so that the mounting performance of the seal member 7 is improved, the rigidity of the seal member 7 is stabilized, and the seal member 7 is sealed. It is possible to stabilize the stopping force.
 内向きフランジ部53は、曲げ加工により形成することができる。内向きフランジ部53は、曲げ加工を行い易くするために、円筒部51よりも薄肉であってもよい。 The inward flange portion 53 can be formed by bending. The inward flange portion 53 may be thinner than the cylindrical portion 51 in order to facilitate bending.
 なお、フランジ部52の形成方法は、上記したバーリング加工に限定されない。たとえば、絞り成型時に第1の部分52aおよび第2の部分52bを含むカップ底を成形しておき、カップ底の中央部分を金型で打ち抜く方法を採用してもよい。 In addition, the formation method of the flange part 52 is not limited to an above-described burring process. For example, a method may be employed in which a cup bottom including the first portion 52a and the second portion 52b is formed at the time of drawing and the center portion of the cup bottom is punched out with a mold.
 また、外輪5の製造方法は、上記したような絞り加工に限定されず、鋼材から外輪を切削して製造してもよい。この場合には、絞り加工時のような弾性回復が起きないので、フランジ部52の第2の部分52bの板厚は特に限定されない。 Moreover, the manufacturing method of the outer ring 5 is not limited to the drawing process as described above, and may be manufactured by cutting the outer ring from a steel material. In this case, since elastic recovery does not occur as in the drawing process, the thickness of the second portion 52b of the flange portion 52 is not particularly limited.
 また、保持器60の製造方法としては、たとえば、圧延鋼板からポケットを打ち抜き、圧延鋼板を円環状に曲げて端部を溶接する方法がある。この製造方法によれば、保持器60の製造コストを抑えることができる。あるいは、プレスで円環形状を絞り成形してもよいし、鋼管を切削して製造してもよい。また、保持器60の素材は、金属に限定されず、樹脂であってもよい。 Further, as a manufacturing method of the cage 60, for example, there is a method of punching a pocket from a rolled steel plate, bending the rolled steel plate into an annular shape, and welding the end portions. According to this manufacturing method, the manufacturing cost of the cage 60 can be suppressed. Alternatively, the annular shape may be drawn by pressing, or may be manufactured by cutting a steel pipe. Further, the material of the cage 60 is not limited to metal, and may be resin.
 (シール部材の構成例について)
 図2を参照して、シール部材7の具体的な構成例について説明する。
(Example of configuration of seal member)
A specific configuration example of the seal member 7 will be described with reference to FIG.
 シール部材7は、上述のように、回転軸2の外周面とハウジング1の内周面との間において、フランジ部52の第2の部分52bを取り囲むように配置されている。そのため、シール部材7は、回転軸2の外周面とフランジ部52の第2の部分52bとの間に位置する内径側シール部71と、ハウジング1の内周面とフランジ部52の第2の部分52bとの間に位置する外径側シール部72とを含む。内径側シール部71および外径側シール部72は、フランジ部52の第2の部分52bよりも軸方向外側に位置する外側シール部73によって一体的に接続されている。 As described above, the seal member 7 is disposed between the outer peripheral surface of the rotary shaft 2 and the inner peripheral surface of the housing 1 so as to surround the second portion 52 b of the flange portion 52. Therefore, the seal member 7 includes an inner diameter side seal portion 71 positioned between the outer peripheral surface of the rotary shaft 2 and the second portion 52 b of the flange portion 52, and the inner peripheral surface of the housing 1 and the second portion of the flange portion 52. And an outer diameter side seal portion 72 located between the portion 52b. The inner diameter side seal portion 71 and the outer diameter side seal portion 72 are integrally connected by an outer seal portion 73 located on the outer side in the axial direction than the second portion 52 b of the flange portion 52.
 内径側シール部71は、フランジ部52の第2の部分52bの内径面と密着して配置されている。内径側シール部71は、フランジ部52の第1の部分52aと軸方向位置が重なっていない。つまり、内径側シール部71は、軸方向において第1の部分52aの位置よりも外側にオフセットして配置されている。本実施の形態においては、リップ74の付け根部分74bが内径側シール部71に含まれており、リップ74は、軸方向外側に向かって斜めに延びている。 The inner diameter side seal portion 71 is disposed in close contact with the inner diameter surface of the second portion 52 b of the flange portion 52. The inner diameter side seal portion 71 does not overlap with the first portion 52a of the flange portion 52 in the axial direction position. That is, the inner diameter side seal portion 71 is disposed offset in the axial direction to the outside of the position of the first portion 52a. In the present embodiment, the base portion 74b of the lip 74 is included in the inner diameter side seal portion 71, and the lip 74 extends obliquely outward in the axial direction.
 外径側シール部72は、ハウジング1の内周面と第2の部分52bの外径面との双方に密着している。また、外径側シール部72の軸方向内側面の少なくとも一部が、フランジ部52の第1の部分52aの軸方向外側面に密着している。 The outer diameter side seal portion 72 is in close contact with both the inner peripheral surface of the housing 1 and the outer diameter surface of the second portion 52b. In addition, at least a part of the axial inner surface of the outer diameter side seal portion 72 is in close contact with the axial outer surface of the first portion 52 a of the flange portion 52.
 外側シール部73は、第2の部分52bの軸方向外側端面に密着しているとともに、外径側シール部72と一体となってハウジング1の内周面に密着している。 The outer seal portion 73 is in close contact with the axially outer end surface of the second portion 52b, and is in close contact with the inner peripheral surface of the housing 1 together with the outer diameter side seal portion 72.
 このように、フランジ部52の第2の部分52bの全体が、シール部材7の内部に入り込んだ状態となっている。さらに、フランジ部52の第2の部分52bが、リップ74の付け根部分74bの軸方向位置(軸方向外側端縁の位置)Lよりも軸方向外側に延びている。これにより、本実施の形態によれば、フランジ部52の第2の部分52bをシール部材7の芯金として機能させることができる。 Thus, the entire second portion 52 b of the flange portion 52 is in a state of entering the inside of the seal member 7. Further, the second portion 52 b of the flange portion 52 extends outward in the axial direction from the axial position (position of the axial outer edge) L of the base portion 74 b of the lip 74. Thereby, according to this Embodiment, the 2nd part 52b of the flange part 52 can be functioned as a metal core of the sealing member 7. FIG.
 したがって、シール部材7のリップ74の回転軸2に対する接触力およびシール部材7の外径側シール部72のハウジング1に対する接触力を高めることができる。その結果、シール部材に芯金を設けた場合と同様に、シール部材7の封止力を高めることができる。 Therefore, the contact force of the lip 74 of the seal member 7 to the rotating shaft 2 and the contact force of the outer diameter side seal portion 72 of the seal member 7 to the housing 1 can be increased. As a result, the sealing force of the sealing member 7 can be increased as in the case where the core member is provided on the sealing member.
 また、芯金を有さないシール部材の場合、シール部材を大きく変形させて封止力を高める必要があるため、シール部材の内部に高い応力が発生する。そのため、このような場合、シール部材に亀裂が発生して封止性を損なう可能性がある。これに対し、本実施の形態では、フランジ部52の第2の部分52bがシール部材7の芯金の役割を果たすことで封止性を高めることができるため、シール部材7の内部に高い応力を発生させる必要がない。したがって、本実施の形態によれば、シール部材7の亀裂を防止または抑制することができる。 Also, in the case of a seal member that does not have a metal core, since it is necessary to greatly deform the seal member to increase the sealing force, high stress is generated inside the seal member. Therefore, in such a case, there is a possibility that the sealing member will be cracked and the sealing performance may be impaired. On the other hand, in the present embodiment, since the second portion 52b of the flange portion 52 serves as a core metal of the seal member 7, the sealing performance can be improved, and therefore, a high stress is applied to the inside of the seal member 7. It is not necessary to generate. Therefore, according to this Embodiment, the crack of the sealing member 7 can be prevented or suppressed.
 また、本実施の形態によれば、シール部材7自体に芯金を内蔵する必要がないため、シール部材7の製造コストを低減できる。また、シェル形外輪である外輪5のフランジ部52の一部が芯金の機能を果たすため、ころ軸受4全体の製造コストを抑えることもできる。 Further, according to the present embodiment, it is not necessary to incorporate a cored bar in the sealing member 7 itself, so that the manufacturing cost of the sealing member 7 can be reduced. In addition, since a part of the flange portion 52 of the outer ring 5 that is a shell-shaped outer ring fulfills the function of a metal core, the manufacturing cost of the roller bearing 4 as a whole can be reduced.
 さらに、内径側シール部71が、フランジ部52の第1の部分52aの位置よりも軸方向内側に食み出すことなく配置されているため、シール部材7が保持器60に接触することがない。したがって、シール部材7の摩耗を防止することができる。 Furthermore, since the inner diameter side seal portion 71 is arranged without protruding inward in the axial direction from the position of the first portion 52 a of the flange portion 52, the seal member 7 does not come into contact with the cage 60. . Therefore, wear of the seal member 7 can be prevented.
 なお、シール部材7は、上記したリップ74の他に、一つ以上のリップをさらに有していてもよい。つまり、シール部材7は、複数のリップを有していてもよい。たとえば、シール部材7の外周面にリップ(図示せず)を設けることで、シール部材7のハウジング1側への接触力をより十分に高めることができる。この場合であっても、リップの付け根部分の軸方向位置が、フランジ部52の第2の部分52bの先端位置よりも軸方向内側に位置していることが望ましい。 The seal member 7 may further include one or more lips in addition to the lip 74 described above. That is, the seal member 7 may have a plurality of lips. For example, by providing a lip (not shown) on the outer peripheral surface of the seal member 7, the contact force of the seal member 7 on the housing 1 side can be more sufficiently increased. Even in this case, it is desirable that the axial position of the base portion of the lip is positioned on the inner side in the axial direction than the tip position of the second portion 52b of the flange portion 52.
 シール部材7の保持(固定)方法としては、たとえば、フランジ部52の表面粗さを粗くすることでシール部材7を保持してもよいし、フランジ部52の一部を細くすることによりシール部材7を引っ掛けて保持してもよい。あるいは、シール部材7の、フランジ部52に接触する部分に、かえりのある突起を設けて抜け止めにしてもよい。 As a method of holding (fixing) the seal member 7, for example, the seal member 7 may be held by increasing the surface roughness of the flange portion 52, or a part of the flange portion 52 may be narrowed to reduce the seal member. 7 may be hooked and held. Or you may provide a protrusion with a burr in the part which contacts the flange part 52 of the sealing member 7, and may prevent it from coming off.
 また、シール部材7をフランジ部52の第2の部分52bに差し込んだ後に接着剤を使用して固定してもよいし、シール部材7を外輪5を含めて射出成形してもよいし、方法は限定しない。 Further, after the seal member 7 is inserted into the second portion 52b of the flange portion 52, the seal member 7 may be fixed using an adhesive, or the seal member 7 including the outer ring 5 may be injection-molded. Is not limited.
 (フランジ部の他の形状例について)
 外輪5のフランジ部52の形状は、図2に示したような形状に限定されない。
(About other shape examples of the flange)
The shape of the flange portion 52 of the outer ring 5 is not limited to the shape as shown in FIG.
 たとえば図3に示すように、フランジ部52Aの第2の部分52bが多少傾斜していてもよい。フランジ部52Aの第2の部分52bは、軸方向外側へ向かうにつれてその内径寸法が徐々に大きくなるように少し傾斜している。 For example, as shown in FIG. 3, the second portion 52b of the flange portion 52A may be slightly inclined. The second portion 52b of the flange portion 52A is slightly inclined so that its inner diameter dimension gradually increases toward the outer side in the axial direction.
 図示しない形状例として、外輪5の第1の部分52aが多少傾斜していてもよい。 As a shape example (not shown), the first portion 52a of the outer ring 5 may be slightly inclined.
 (シール部材の他の形状例について)
 外輪5のフランジ部52によって保持されるシール部材7の形状は、図2に示したような形状に限定されない。
(About other shapes of seal members)
The shape of the seal member 7 held by the flange portion 52 of the outer ring 5 is not limited to the shape shown in FIG.
 たとえば図4に示すように、シール部材7Aは、図2に示した外径側シール部72を有していなくてもよい。この場合、フランジ部52の第2の部分52bよりも軸方向外側に位置する外側シール部73だけがハウジング1の内周面に密着して配置される。この例においても、内径側シール部71が第2の部分52bの内径面に接着されることにより、外輪5のフランジ部52によってシール部材7Aを補強することができる。 For example, as shown in FIG. 4, the seal member 7 </ b> A may not have the outer diameter side seal portion 72 shown in FIG. 2. In this case, only the outer seal portion 73 positioned on the outer side in the axial direction than the second portion 52 b of the flange portion 52 is disposed in close contact with the inner peripheral surface of the housing 1. Also in this example, the seal member 7A can be reinforced by the flange portion 52 of the outer ring 5 by bonding the inner diameter side seal portion 71 to the inner diameter surface of the second portion 52b.
 なお、シール部材7Aのフランジ部52への接着は、たとえば接着剤によって実現されてもよいし、加熱溶着によって実現されてもよい。 Note that the adhesion of the seal member 7A to the flange portion 52 may be realized by, for example, an adhesive, or may be realized by heat welding.
 また、図5に示すように、シール部材7Bは、外径側シール部72だけでなく外側シール部73も有していなくてもよい。この場合、リップ74の全体が内径側シール部71に含まれており、リップ74の先端部74aは、フランジ部52の第2の部分52bによって回転軸2の外周面に押し付けられる。 Further, as shown in FIG. 5, the seal member 7 </ b> B may not include not only the outer diameter side seal portion 72 but also the outer seal portion 73. In this case, the entire lip 74 is included in the inner diameter side seal portion 71, and the tip end portion 74 a of the lip 74 is pressed against the outer peripheral surface of the rotating shaft 2 by the second portion 52 b of the flange portion 52.
 あるいは、図6に示すように、シール部材7Cは、図2に示した内径側シール部71を有していなくてもよい。この場合、リップ74の全体が外側シール部73に含まれている。この例においても、外径側シール部72が第2の部分52bの外径面に接着されることにより、外輪5のフランジ部52によってシール部材7Cを補強することができる。 Alternatively, as illustrated in FIG. 6, the seal member 7 </ b> C may not include the inner diameter side seal portion 71 illustrated in FIG. 2. In this case, the entire lip 74 is included in the outer seal portion 73. Also in this example, the seal member 7C can be reinforced by the flange portion 52 of the outer ring 5 by bonding the outer diameter side seal portion 72 to the outer diameter surface of the second portion 52b.
 また、図7に示すように、シール部材7Dがフランジ部52の第2の部分52bを取り囲むように配置される場合であっても、フランジ部52の第2の部分52b周辺のシール形状を適宜変更してもよい。これにより、ハウジング1側および回転軸2側に対するシール部材7Dの接触力を調整したり、フランジ部52の第2の部分52bへのシール部材7Dの嵌め込み(装着)を簡易化したりできる。 Further, as shown in FIG. 7, even when the seal member 7D is arranged so as to surround the second portion 52b of the flange portion 52, the seal shape around the second portion 52b of the flange portion 52 is appropriately set. It may be changed. Thereby, the contact force of the seal member 7D with respect to the housing 1 side and the rotating shaft 2 side can be adjusted, and the fitting (attachment) of the seal member 7D to the second portion 52b of the flange portion 52 can be simplified.
 なお、図6に示すように、リップ74の全体が外側シール部73に含まれる形態においては、図2等に示されるような、リップ74の少なくとも付け根部分74bが内径側シール部71に含まれる形態に比べて、リップ74の付け根部分74bから先端部74aまでの径方向寸法を大きくすることができる。そのため、リップ74の強度の向上、および、シール部材の加工性の観点からすれば、リップ74の全体が外側シール部73に含まれるように構成することが望ましい。 As shown in FIG. 6, in the form in which the entire lip 74 is included in the outer seal portion 73, at least the root portion 74 b of the lip 74 is included in the inner diameter side seal portion 71 as shown in FIG. Compared with the form, the radial dimension from the base 74b to the tip 74a of the lip 74 can be increased. Therefore, from the viewpoint of improving the strength of the lip 74 and the workability of the seal member, it is desirable that the entire lip 74 is included in the outer seal portion 73.
 図8には、リップ74の全体が外側シール部73に含まれるように構成されたシール部材の他の形状例が模式的に示されている。図8に示すシール部材7Eは、図6に示したシール部材7Cと同様に、外径側シール部72Aと外側シール部73Aとにより構成されている。外径側シール部72Aは、シール部材7Eのうち、ハウジング1の内周面と外輪5のフランジ部52の第2の部分52bとの間に配置される領域(第1領域)に相当する。外側シール部73Aは、シール部材7Eのうち、外輪5のフランジ部52の第2の部分52bよりも軸方向外側に位置し、ハウジング1の内周面と回転軸2の外周面との間に配置される領域(第2領域)に相当する。外径側シール部72Aおよび外側シール部73Aは、軸方向に連なって一体形成されている。 FIG. 8 schematically shows another example of the shape of the seal member configured so that the entire lip 74 is included in the outer seal portion 73. A seal member 7E shown in FIG. 8 includes an outer diameter side seal portion 72A and an outer seal portion 73A, similarly to the seal member 7C shown in FIG. The outer diameter side seal portion 72A corresponds to a region (first region) of the seal member 7E disposed between the inner peripheral surface of the housing 1 and the second portion 52b of the flange portion 52 of the outer ring 5. The outer seal portion 73A is located on the outer side in the axial direction than the second portion 52b of the flange portion 52 of the outer ring 5 in the seal member 7E, and is between the inner peripheral surface of the housing 1 and the outer peripheral surface of the rotary shaft 2. This corresponds to the area (second area) to be arranged. The outer-diameter side seal portion 72A and the outer-side seal portion 73A are integrally formed continuously in the axial direction.
 外径側シール部72Aは、フランジ部52の第2の部分52bの外周面に接触(面接触)するとともに、フランジ部52の第1の部分52aの軸方向外側面にも接触(面接触)した状態で配置される。なお、外径側シール部72Aは、第1の部分52aの軸方向外側面に接触していなくてもよい。 The outer diameter side seal portion 72A contacts (surface contact) with the outer peripheral surface of the second portion 52b of the flange portion 52, and also contacts (surface contact) with the axially outer surface of the first portion 52a of the flange portion 52. Placed in the state. Note that the outer diameter side seal portion 72A may not be in contact with the axially outer surface of the first portion 52a.
 外側シール部73Aは、外径側シール部72Aの内周面の位置(フランジ部52の第2の部分52bの外周面の位置)よりも径方向外側に位置する本体部75と、外径側シール部72Aの内周面の位置よりも径方向内側に突出して、フランジ部52の第2の部分52bの端面52cに対面する対面部76と、対面部76の径方向内側端部から軸方向外側に向かって(斜めに)延びるリップ74とを有している。 The outer seal portion 73A includes a main body portion 75 that is positioned radially outward from the position of the inner peripheral surface of the outer diameter side seal portion 72A (the position of the outer peripheral surface of the second portion 52b of the flange portion 52), Projecting radially inward from the position of the inner peripheral surface of the seal portion 72A and facing the end surface 52c of the second portion 52b of the flange portion 52, and the axial direction from the radially inner end of the facing portion 76 And a lip 74 extending outward (obliquely).
 リップ74の付け根部分74bは、フランジ部52の第2の部分52bの厚み範囲内に配置されている。リップ74の付け根部分74bは、対面部76に含まれる。なお、本体部75の径方向内側端部から直接、リップ74が軸方向外側に向かって斜めに延びていてもよい。 The base portion 74 b of the lip 74 is disposed within the thickness range of the second portion 52 b of the flange portion 52. A base portion 74 b of the lip 74 is included in the facing portion 76. Note that the lip 74 may extend obliquely from the radially inner end of the main body 75 toward the axially outer side.
 ここで、図8に示されるように、外側シール部73Aの対面部76は、フランジ部52の第2の部分52bの端面52cと接触していない。この点において、図6に示したシール部材7Cと大きく異なる。 Here, as shown in FIG. 8, the facing portion 76 of the outer seal portion 73 </ b> A is not in contact with the end surface 52 c of the second portion 52 b of the flange portion 52. In this respect, it is greatly different from the seal member 7C shown in FIG.
 具体的には、外径側シール部72Aの軸方向内側端面の位置から、外側シール部73Aの対面部76までの軸方向長さL1は、フランジ部52の第2の部分52bの軸方向長さL2よりも長い。軸方向長さL2は、フランジ部52の第1の部分52aの外側面の位置を起点とした、第2の部分52bの軸方向長さに相当する。これにより、フランジ部52の端面52cと、外側シール部73Aの対面部76(つまり、リップ74の付け根部分74b)との間に、隙間Cが形成される。なお、図8においては、理解を容易にする観点から、隙間Cを誇張して示している。 Specifically, the axial length L1 from the position of the axially inner end face of the outer diameter side seal portion 72A to the facing portion 76 of the outer seal portion 73A is the axial length of the second portion 52b of the flange portion 52. Longer than L2. The axial length L2 corresponds to the axial length of the second portion 52b starting from the position of the outer surface of the first portion 52a of the flange portion 52. Thereby, a gap C is formed between the end surface 52c of the flange portion 52 and the facing portion 76 of the outer seal portion 73A (that is, the root portion 74b of the lip 74). In FIG. 8, the gap C is exaggerated from the viewpoint of facilitating understanding.
 ハウジング1の内周面と回転軸2の外周面との間隔L12が2.0mm程度である場合、これらの軸方向長さL1,L2の差は、0.1mm以上であることが望ましい。つまり、軸方向長さL1,L2の差は、間隔L12の1/20以上であることが望ましい。なお、シール部材7E全体の軸方向寸法等を考慮すると、軸方向長さL1,L2の差は、間隔L12の1/10以下(0.2mm以下)であることも望ましい。 When the distance L12 between the inner peripheral surface of the housing 1 and the outer peripheral surface of the rotary shaft 2 is about 2.0 mm, the difference between the axial lengths L1 and L2 is preferably 0.1 mm or more. That is, the difference between the axial lengths L1 and L2 is preferably 1/20 or more of the interval L12. In consideration of the axial dimension of the entire seal member 7E, the difference between the axial lengths L1 and L2 is preferably 1/10 or less (0.2 mm or less) of the distance L12.
 外側シール部73Aの本体部75は、リップ74の付け根部分74bの位置よりも軸方向外側に張り出す張り出し部77を有している。張り出し部77は、リップ74の外径面に対面し、リップ74の反力を受ける部分である。張り出し部77を含む本体部75の外周面は、ハウジング1の内周面に密着して配置される。外側シール部73の本体部75の外周面は、外径側シール部72Aの外周面とともに1つの円筒面を形成している。 The main body portion 75 of the outer seal portion 73A has a protruding portion 77 that protrudes outward in the axial direction from the position of the base portion 74b of the lip 74. The overhanging portion 77 is a portion that faces the outer diameter surface of the lip 74 and receives a reaction force of the lip 74. The outer peripheral surface of the main body 75 including the overhanging portion 77 is disposed in close contact with the inner peripheral surface of the housing 1. The outer peripheral surface of the main body 75 of the outer seal portion 73 forms one cylindrical surface together with the outer peripheral surface of the outer diameter side seal portion 72A.
 張り出し部77の径方向の厚み寸法L13は、リップ74の径方向の厚み寸法(付け根部分74bから先端部74aまでの径方向寸法)L14よりも大きい。これにより、張り出し部77の強度がリップ74の強度よりも高くなるため、張り出し部77の変形がリップ74の変形に影響しにくい。 The radial thickness dimension L13 of the overhanging portion 77 is larger than the radial thickness dimension (radial dimension from the root portion 74b to the tip portion 74a) L14 of the lip 74. As a result, the strength of the overhanging portion 77 is higher than the strength of the lip 74, so that the deformation of the overhanging portion 77 hardly affects the deformation of the lip 74.
 張り出し部77の厚み寸法L13は、図6に示す形態とは異なり、外径側シール部72Aの厚み寸法L11よりも小さくてもよい。これにより、本体部75の断面形状は、略L字状となる。 Unlike the embodiment shown in FIG. 6, the thickness dimension L13 of the protruding portion 77 may be smaller than the thickness dimension L11 of the outer diameter side seal portion 72A. Thereby, the cross-sectional shape of the main-body part 75 becomes a substantially L shape.
 この場合、張り出し部77とリップ74との間には、張り出し部77の内周面と、リップ74の外径面と、軸方向外側を向く環状面75aとに囲まれ、軸方向外側に開口する空間Sが形成されている。環状面75aは、径方向に延在し、リップ74の付け根部分74bを内周とし、張り出し部77の内周面の軸方向内側端縁を外周とする面である。なお、環状面75aは、軸方向に直交する直交面であってもよいし、外周に向かって裾広がりとなるようなテーパ面であってもよい。 In this case, a space between the projecting portion 77 and the lip 74 is surrounded by an inner peripheral surface of the projecting portion 77, an outer diameter surface of the lip 74, and an annular surface 75a facing outward in the axial direction. A space S is formed. The annular surface 75 a is a surface that extends in the radial direction and has a base portion 74 b of the lip 74 as an inner periphery and an axially inner end edge of the inner peripheral surface of the projecting portion 77 as an outer periphery. The annular surface 75a may be an orthogonal surface orthogonal to the axial direction, or may be a tapered surface that expands toward the outer periphery.
 図8に示すようなシール部材7Eを外輪5のフランジ部52に取り付けた場合、外径側シール部72Aが、フランジ部52の第1の部分52aの外側面に面接触した状態で、外径側シール部72Aの内径面が、フランジ部52の第2の部分52bの外径面に面接触する。シール部材7Eは外周側に締め代を有している。これにより、シール部材7Eは、ハウジング1の内周面とフランジ部52の第2の部分52bとの間に挟み込まれるので、この形態においても、フランジ部52の第2の部分52bをシール部材7Eの芯金として機能させることができる。 When the seal member 7E as shown in FIG. 8 is attached to the flange portion 52 of the outer ring 5, the outer diameter side seal portion 72A is in surface contact with the outer surface of the first portion 52a of the flange portion 52. The inner diameter surface of the side seal portion 72 </ b> A is in surface contact with the outer diameter surface of the second portion 52 b of the flange portion 52. The seal member 7E has a tightening margin on the outer peripheral side. As a result, the seal member 7E is sandwiched between the inner peripheral surface of the housing 1 and the second portion 52b of the flange portion 52. Therefore, also in this embodiment, the second portion 52b of the flange portion 52 is inserted into the seal member 7E. It can function as a metal core.
 なお、シール部材7Eの脱落を防止するために、外径側シール部72Aは、フランジ部52の第1の部分52aの外側面、および、フランジ部52の第2の部分52bの外径面のうちの少なくとも一方に、公知の手法(接着剤による接着、加熱融着など)によって固着されることが望ましい。 In order to prevent the seal member 7E from falling off, the outer diameter side seal portion 72A is provided on the outer surface of the first portion 52a of the flange portion 52 and the outer diameter surface of the second portion 52b of the flange portion 52. It is desirable to fix to at least one of them by a known method (adhesion with an adhesive, heat fusion, etc.).
 また、図8の例では、リップ74の付け根部分74bと、フランジ部52の端面52cとの間には、隙間Cが設けられている。リップ74の付け根部分74bがフランジ部52の端面52cに接触して配置される場合、軸方向外側からの圧力がリップ74に掛かると、付け根部分74bは動かず、リップ74の先端部分しか動かないため、リップ74の先端部分の摩耗が懸念される。これに対し、この例では、リップ74の付け根部分74bとフランジ部52の端面52cとの間に隙間Cがある分、軸方向外側からの圧力(矢印A1方向の圧力)に対し、付け根部分74bを含めたリップ74全体で対抗できる。これにより、リップ74の先端部(回転軸2との摺接部)74aに掛かる力が抑制されるため、リップ74の摩耗を防止することができる。 Further, in the example of FIG. 8, a gap C is provided between the base portion 74 b of the lip 74 and the end surface 52 c of the flange portion 52. When the root portion 74b of the lip 74 is disposed in contact with the end face 52c of the flange portion 52, when the pressure from the outside in the axial direction is applied to the lip 74, the root portion 74b does not move and only the tip portion of the lip 74 moves. Therefore, there is a concern about wear of the tip portion of the lip 74. On the other hand, in this example, since there is a gap C between the root portion 74b of the lip 74 and the end surface 52c of the flange portion 52, the root portion 74b is against the pressure from the outside in the axial direction (pressure in the direction of the arrow A1). The entire lip 74 including can be countered. Thereby, since the force applied to the front-end | tip part (sliding contact part with the rotating shaft 2) 74a of the lip 74 is suppressed, wear of the lip 74 can be prevented.
 また、軸方向外側からの圧力を受けたとしても、リップ74の付け根部分74bがフランジ部52の端面52cに突き当たらない。そのため、フランジ部52の第2の部分52bの肉厚が薄い場合であっても、軸方向外側からの圧力による第2の部分52bの変形を防止することができる。 Further, even if pressure is applied from the outside in the axial direction, the base portion 74 b of the lip 74 does not hit the end surface 52 c of the flange portion 52. Therefore, even when the thickness of the second portion 52b of the flange portion 52 is thin, the deformation of the second portion 52b due to the pressure from the outside in the axial direction can be prevented.
 また、シール部材7Eがフランジ部52の端面52cに当接しないようにすることで、端面52c全体が滑らかな面でない場合であっても、シール部材7Eの損傷を防止することができる。具体的には、外輪5をプレスせん断加工により成形する場合、カップの底部の中央部分をパンチ(治具)で打ち抜く工程において、カップの底部の切断面に、凹凸の激しい破断面およびバリが生成される。そのため、フランジ部52の第1の部分52aの外側面52fおよび第2の部分52bの外径面は滑らかな面であるのに対し、図9に示されるように、第2の部分52bの端面52cには、破断面52dおよびバリ52eが残る。バリ52eは、端面52cの外径側の角に形成される。なお、図9では、破断面52dの凹凸およびバリ52eが誇張して示されている。 Further, by preventing the seal member 7E from coming into contact with the end surface 52c of the flange portion 52, damage to the seal member 7E can be prevented even when the entire end surface 52c is not a smooth surface. Specifically, when the outer ring 5 is formed by press shearing, in the process of punching the center part of the bottom of the cup with a punch (jig), a severely broken surface and burrs are generated on the cut surface of the bottom of the cup. Is done. Therefore, the outer surface 52f of the first portion 52a of the flange portion 52 and the outer diameter surface of the second portion 52b are smooth surfaces, whereas the end surface of the second portion 52b is shown in FIG. The fracture surface 52d and the burr 52e remain in 52c. The burr 52e is formed at a corner on the outer diameter side of the end face 52c. In FIG. 9, the unevenness of the fracture surface 52d and the burr 52e are exaggerated.
 フランジ部52の端面52cがこのような破断面52dおよびバリ52eを有する場合であっても、リップ74の付け根部分74bを含む対面部76がフランジ部52の端面52cに当接しないため、高負荷時においてもシール部材7Eの損傷を防止できる。また、外側シール部73Aの本体部75の軸方向外側端面に加わる軸方向外側からの力は、そのまま軸方向内側へ向かい、フランジ部52の第1の部分52aの外側面で受け止められる。このように、バリ52eに向かう方向には力が加わらないため、(外側シール部73Aの本体部75と外径側シール部72Aとの境界部分にバリ52eが多少接触していたとしても)バリ52eの影響を受け難くすることができる。 Even when the end surface 52c of the flange portion 52 has such a fracture surface 52d and a burr 52e, the facing portion 76 including the base portion 74b of the lip 74 does not abut against the end surface 52c of the flange portion 52. Even at times, the seal member 7E can be prevented from being damaged. Further, the force from the outside in the axial direction applied to the outer end surface in the axial direction of the main body portion 75 of the outer seal portion 73A is directed inward in the axial direction and is received by the outer surface of the first portion 52a of the flange portion 52. Thus, since no force is applied in the direction toward the burr 52e (even if the burr 52e is slightly in contact with the boundary portion between the main body 75 of the outer seal portion 73A and the outer diameter side seal portion 72A), It can be made difficult to be influenced by 52e.
 また、リップ74の外径面と張り出し部77の内周面との間の空間Sの径方向寸法が比較的大きくとられているため、空間Sに高圧の流体が入り込んできた場合、張り出し部77をハウジング1の内周面に押し付ける力が働く。そのため、シール部材7Eは、図6に示したシール部材7Cよりも、リップ74に力を伝えにくい構造となっている。これにより、リップ74を回転軸2に安定して接触させることができるため、回転軸2の作動トルクの増大を防止することができる。 In addition, since the radial dimension of the space S between the outer diameter surface of the lip 74 and the inner peripheral surface of the overhanging portion 77 is relatively large, when a high-pressure fluid enters the space S, the overhanging portion The force which presses 77 to the internal peripheral surface of the housing 1 acts. Therefore, the seal member 7E has a structure that is less likely to transmit force to the lip 74 than the seal member 7C shown in FIG. Thereby, since the lip 74 can be stably brought into contact with the rotating shaft 2, an increase in the operating torque of the rotating shaft 2 can be prevented.
 以上説明したシール部材(7あるいは7A,・・・,7E)は、フランジ部52の第2の部分52bの外径面および内径面の少なくとも一方に面接触した状態で配置されるため、外輪5に対するシール部材の心合わせが容易になるという利点がある。 The seal member (7 or 7A,..., 7E) described above is disposed in surface contact with at least one of the outer diameter surface and the inner diameter surface of the second portion 52b of the flange portion 52. There is an advantage that the seal member can be easily aligned with respect to the center.
 具体的には、シェル形外輪が、薄肉帯鋼を材料としてプレス加工により成形され、熱処理により硬度を高めて製造されるような場合、薄肉帯鋼の異方性または熱処理ひずみにより軌道面(円筒部の内周面)の真円度が大きくなるという特性がある。また、外輪の円筒部の外径寸法はハウジング1の内周面の直径よりも大きくなるように製造され、円筒部は、ハウジング1への圧入の際にハウジング1から受ける圧力によって変形するという特性がある。そのため、シェル形外輪の軌道面をシール部材の位置合わせの基準面にすることは困難である。これに対し、本実施の形態では、外輪5のフランジ部52が、取り付け状態においてハウジング1の内周面から離れて配置される第2の部分52bを有しているため、この第2の部分52bの外径面または内径面を、シール部材の位置合わせの基準面にすることが可能である。 Specifically, when the shell-shaped outer ring is formed by press working using a thin steel strip as a material and is manufactured by increasing the hardness by heat treatment, the raceway surface (cylindrical surface) is caused by anisotropy or heat treatment strain of the thin steel strip. There is a characteristic that the roundness of the inner peripheral surface of the portion increases. In addition, the outer diameter of the cylindrical portion of the outer ring is manufactured to be larger than the diameter of the inner peripheral surface of the housing 1, and the cylindrical portion is deformed by the pressure received from the housing 1 when press-fitted into the housing 1. There is. Therefore, it is difficult to use the raceway surface of the shell-shaped outer ring as a reference surface for alignment of the seal member. On the other hand, in the present embodiment, the flange portion 52 of the outer ring 5 has the second portion 52b that is disposed away from the inner peripheral surface of the housing 1 in the attached state. The outer diameter surface or inner diameter surface of 52b can be used as a reference surface for alignment of the seal member.
 第2の部分52bの軸方向寸法は円筒部51の軸方向寸法よりも十分に短く、かつ、第2の部分52bは径方向内側に延びる鋼材を軸方向外側に折り曲げて形成されているため比較的強度が高い。そのため、本実施の形態に係る外輪5の製造時に熱処理を行ったとしても、第2の部分52bの外径面または内径面にひずみが生じる可能性が低い。 Since the axial dimension of the second portion 52b is sufficiently shorter than the axial dimension of the cylindrical portion 51, and the second portion 52b is formed by bending a steel material extending radially inward outward in the axial direction, the comparison is made. High strength. Therefore, even if heat treatment is performed during manufacture of the outer ring 5 according to the present embodiment, there is a low possibility of distortion occurring on the outer diameter surface or inner diameter surface of the second portion 52b.
 なお、第2の部分52bの外径面または内径面をシール部材の位置合わせの基準面とするためには、フランジ部52の第2の部分52bの外径面または内径面の軸線が、ハウジング1の内周面の軸線を中心とした直径0.5mmの仮想円の内側に配置されていればよい。図8には、ハウジング1の内周面の軸線J1を中心とした直径D=0.5mmの仮想円の外周位置が一点鎖線93で模式的に示されている。フランジ部52の第2の部分52bの外径面または内径面の軸線J2は、理想的にはハウジング1の内周面の軸線J1と一致していることが望ましいものの、この仮想円の内側に配置されていればよい。 In order to use the outer diameter surface or inner diameter surface of the second portion 52b as a reference surface for alignment of the seal member, the axis of the outer diameter surface or inner diameter surface of the second portion 52b of the flange portion 52 is used as a housing. What is necessary is just to be arrange | positioned inside the virtual circle of diameter 0.5mm centering on the axis line of 1 inner peripheral surface. In FIG. 8, the outer peripheral position of an imaginary circle having a diameter D = 0.5 mm around the axis J <b> 1 of the inner peripheral surface of the housing 1 is schematically shown by a one-dot chain line 93. Although the axis J2 of the outer diameter surface or inner diameter surface of the second portion 52b of the flange portion 52 is ideally coincident with the axis J1 of the inner peripheral surface of the housing 1, it is inside the virtual circle. It only has to be arranged.
 第2の部分52bの肉厚(図1の寸法D13に相当)が円筒部51の肉厚(図1の寸法D11に相当)よりも大きい場合、第2の部分52bの外径面または内径面にひずみが生じる可能性がさらに低減する。このように、シール部材の心合わせ、および、第2の部分52bの強度の観点からすれば、第2の部分52bの肉厚は、円筒部51の肉厚以上であることが望ましい。また、第2の部分52bの肉厚は、第1の部分52aの肉厚以上であってもよい。さらに、第1の部分52aおよび第2の部分52bの双方が、図1に示した内向きフランジ部53の肉厚より大きくてもよい。なお、第2の部分52bの内径寸法は、内向きフランジ部53の内径寸法よりも小さくてもよい。 When the thickness of the second portion 52b (corresponding to the dimension D13 in FIG. 1) is larger than the thickness of the cylindrical portion 51 (corresponding to the dimension D11 in FIG. 1), the outer diameter surface or inner diameter surface of the second portion 52b. This further reduces the possibility of distortion. Thus, from the viewpoint of the alignment of the seal member and the strength of the second portion 52b, the thickness of the second portion 52b is preferably equal to or greater than the thickness of the cylindrical portion 51. Further, the thickness of the second portion 52b may be equal to or greater than the thickness of the first portion 52a. Further, both the first portion 52a and the second portion 52b may be larger than the thickness of the inward flange portion 53 shown in FIG. Note that the inner diameter dimension of the second portion 52 b may be smaller than the inner diameter dimension of the inward flange portion 53.
 この場合、フランジ部52の加工は次のように行うことが可能である。すなわち、円筒部51の外周面および内周面をプレス加工する際にフランジ部52の第2の部分52bを同時に加工し、金型内に外輪5が拘束されている状態で、第2の部分52bの軸心と円筒部51の軸心とが合うように、フランジ部52を製造してもよい。 In this case, the processing of the flange portion 52 can be performed as follows. That is, when the outer peripheral surface and the inner peripheral surface of the cylindrical portion 51 are pressed, the second portion 52b of the flange portion 52 is processed at the same time, and the second portion 52 is constrained in the mold. The flange portion 52 may be manufactured so that the shaft center of 52b and the shaft center of the cylindrical portion 51 are aligned.
 (ころ軸受の用途例)
 ここで、本実施の形態に係るころ軸受4の用途について説明する。ころ軸受4は,たとえばEGR(Exhaust Gas Recirculation)制御弁などの流体制御弁に適用することができる。すなわち、ころ軸受4は、EGR制御弁用のころ軸受である。
(Application examples of roller bearings)
Here, the use of the roller bearing 4 according to the present embodiment will be described. The roller bearing 4 can be applied to a fluid control valve such as an EGR (Exhaust Gas Recirculation) control valve. That is, the roller bearing 4 is a roller bearing for an EGR control valve.
 図10は、本実施の形態に係るころ軸受4が適用されたEGR制御弁の要部を模式的に示す概略断面図である。EGR制御弁は、ハウジング1の内部に形成された排気ガス流路11の開口面積を連続的または段階的に変更することで、排気ガス流路11を経由して、排気通路から吸気通路へ再循環(還流)される排気ガスの流量を可変制御する排気ガス流量制御弁(排気絞り弁)である。 FIG. 10 is a schematic cross-sectional view schematically showing a main part of an EGR control valve to which the roller bearing 4 according to the present embodiment is applied. The EGR control valve re-opens the exhaust passage from the exhaust passage to the intake passage through the exhaust gas passage 11 by changing the opening area of the exhaust gas passage 11 formed inside the housing 1 continuously or stepwise. This is an exhaust gas flow rate control valve (exhaust throttle valve) that variably controls the flow rate of exhaust gas that is circulated (refluxed).
 ハウジング1には、排気ガス流路11に交差する円筒状の孔部12が設けられており、この孔部12に、回転軸2と、回転軸2を回転自在に支持する支持機構とが収容される。ハウジング1の孔部12は、軸方向中央に位置する中央孔部12aと、中央孔部12aの軸方向一方側(紙面左側)に位置し中央孔部12aよりも小径である小径孔部12bと、中央孔部12aの軸方向他方側(紙面右側)に位置し中央孔部12aよりも大径である大径孔部12cとを有している。 The housing 1 is provided with a cylindrical hole 12 that intersects with the exhaust gas flow path 11, and the rotation shaft 2 and a support mechanism that rotatably supports the rotation shaft 2 are accommodated in the hole 12. Is done. The hole 12 of the housing 1 includes a central hole 12a located at the center in the axial direction, a small-diameter hole 12b located on one axial side (left side of the paper) of the central hole 12a and having a smaller diameter than the central hole 12a. And a large-diameter hole portion 12c which is located on the other axial side of the central hole portion 12a (on the right side in the drawing) and has a larger diameter than the central hole portion 12a.
 回転軸2は、支持機構に支持される大径部21と、大径部21よりも小径であり、大径部21の軸方向一方側に隣接して位置する小径部22とを有している。小径部22の先端部は、ガス流路11にまで突出し、ガス流路11内において弁体13に連結固定されている。ハウジング1の中央孔部12aおよび大径孔部12cに、回転軸2の大径部21が収容され、ハウジング1の小径孔部12bに、回転軸2の小径部22の軸方向他方端部が収容されている。図10には、回転軸2の軸線が一点鎖線で示されている。 The rotating shaft 2 includes a large diameter portion 21 supported by a support mechanism, and a small diameter portion 22 which is smaller in diameter than the large diameter portion 21 and is located adjacent to one side in the axial direction of the large diameter portion 21. Yes. The tip of the small diameter portion 22 protrudes to the gas flow path 11 and is connected and fixed to the valve body 13 in the gas flow path 11. The large-diameter portion 21 of the rotary shaft 2 is accommodated in the central hole portion 12a and the large-diameter hole portion 12c of the housing 1, and the other axial end portion of the small-diameter portion 22 of the rotary shaft 2 is accommodated in the small-diameter hole portion 12b of the housing 1. Contained. In FIG. 10, the axis of the rotating shaft 2 is indicated by a one-dot chain line.
 弁体13は、平面視において円形状である。弁体13は、回転軸2の回転角度に応じて、全閉位置と全開位置との間で姿勢(位置)が変更させられる。図10では、全閉位置の弁体13が実線で示され、全開位置の弁体13が想像線(二点鎖線)で示されている。 The valve element 13 has a circular shape in plan view. The posture (position) of the valve body 13 is changed between the fully closed position and the fully open position according to the rotation angle of the rotary shaft 2. In FIG. 10, the valve element 13 in the fully closed position is indicated by a solid line, and the valve element 13 in the fully open position is indicated by an imaginary line (two-dot chain line).
 排気ガス流路11は、排気通路側の流路11aと、吸気通路側の流路11bとを有しており、流路11a側から流路11b側へと排気ガスが流れる。この例では、流路11aの方が流路11bよりも直径(内径)が大きく形成されており、これらの流路11a,11b間に段差部11cが設けられている。弁体13の直径(外径)は、流路11aの直径よりも小さく、流路11bの直径よりも大きい。 The exhaust gas flow path 11 has a flow path 11a on the exhaust passage side and a flow path 11b on the intake passage side, and the exhaust gas flows from the flow path 11a side to the flow path 11b side. In this example, the flow path 11a has a larger diameter (inner diameter) than the flow path 11b, and a step portion 11c is provided between the flow paths 11a and 11b. The diameter (outer diameter) of the valve body 13 is smaller than the diameter of the flow path 11a and larger than the diameter of the flow path 11b.
 弁体13が全閉位置に位置するとき、弁体13は排気ガス流路11の段差部11cに嵌まり込む。これにより、排気ガス流路11の内周面と弁体13の外周端面との間の環状隙間が完全に封鎖される。この場合、排気ガスが、エアクリーナを通過した清浄な吸気(新気)に混入されない。 When the valve body 13 is located at the fully closed position, the valve body 13 is fitted into the step portion 11 c of the exhaust gas passage 11. As a result, the annular gap between the inner peripheral surface of the exhaust gas passage 11 and the outer peripheral end surface of the valve body 13 is completely sealed. In this case, the exhaust gas is not mixed into clean intake air (fresh air) that has passed through the air cleaner.
 弁体13が開位置に位置するとき、弁体13の外周部はガス流路11の段差部11cに接触しない。この場合、排気ガスが、エアクリーナを通過した清浄な吸気(新気)に混入される。 When the valve body 13 is located at the open position, the outer peripheral portion of the valve body 13 does not contact the stepped portion 11c of the gas flow path 11. In this case, the exhaust gas is mixed into clean intake air (fresh air) that has passed through the air cleaner.
 支持機構は、玉軸受3と上記したころ軸受4とを一つずつ含む。玉軸受3およびころ軸受4は、回転軸2の大径部21をハウジング1に対して回転自在に支持している。支持機構が、ころ軸受4だけでなく玉軸受3も含むことによって、回転軸2の軸方向位置が固定される。玉軸受3と、ころ軸受4と、これらの軸受3,4に支持される回転軸2と、ハウジング1とで、回転軸支持構造が構成される。 The support mechanism includes one ball bearing 3 and one roller bearing 4 described above. The ball bearing 3 and the roller bearing 4 support the large-diameter portion 21 of the rotating shaft 2 so as to be rotatable with respect to the housing 1. When the support mechanism includes not only the roller bearing 4 but also the ball bearing 3, the axial position of the rotating shaft 2 is fixed. The ball bearing 3, the roller bearing 4, the rotating shaft 2 supported by these bearings 3 and 4, and the housing 1 constitute a rotating shaft support structure.
 玉軸受3の外径寸法はころ軸受4の外径寸法よりも大きい。玉軸受3は、ハウジング1の大径孔部12cに圧入され、ころ軸受4は、ハウジング1の中央孔部12aに圧入されている。ころ軸受4は、玉軸受3よりも排気ガス流路11側に設けられている。 The outer diameter of the ball bearing 3 is larger than the outer diameter of the roller bearing 4. The ball bearing 3 is press-fitted into the large-diameter hole 12 c of the housing 1, and the roller bearing 4 is press-fitted into the central hole 12 a of the housing 1. The roller bearing 4 is provided closer to the exhaust gas flow path 11 than the ball bearing 3.
 EGR制御弁においては、排気ガス流路11内の排気ガスが、ハウジング1の孔部12(小径孔部12b)の内周面と回転軸2の小径部22の外周面との間の環状隙間14を介して、ころ軸受4が配置された中央孔部12aに侵入することが想定される。ころ軸受4は、ガス流路11側の端部にシール部材7(7A,7B,7C,7D,7E)を備えているため、腐食性流体としての排気ガスがころ軸受4の内部に侵入することを防止することができる。 In the EGR control valve, the exhaust gas in the exhaust gas passage 11 is caused by an annular gap between the inner peripheral surface of the hole portion 12 (small diameter hole portion 12b) of the housing 1 and the outer peripheral surface of the small diameter portion 22 of the rotary shaft 2. 14 is assumed to enter the central hole portion 12a in which the roller bearing 4 is disposed. Since the roller bearing 4 includes the seal member 7 (7A, 7B, 7C, 7D, 7E) at the end on the gas flow path 11 side, the exhaust gas as a corrosive fluid enters the roller bearing 4. This can be prevented.
 さらに、シール部材7が、外輪5のフランジ部52の第2の部分52bによって補強されているため、本実施の形態によれば、シール部材7による流体の封止性を高めることができる。したがって、高圧の流体に対しても、シール部材7によって適切に封止することができる。 Furthermore, since the seal member 7 is reinforced by the second portion 52b of the flange portion 52 of the outer ring 5, according to the present embodiment, the fluid sealing performance by the seal member 7 can be enhanced. Therefore, even the high-pressure fluid can be properly sealed by the seal member 7.
 また、回転軸2に摺接するシール部材7が、保持器60と接触しないため、シール部材が保持器またはころに接触する場合に生じ得るころ軸受の作動トルクの増加を阻止することができる。これにより、EGR制御弁の作動トルクの上昇を防ぐことができるため、作動用のモータを小型化にすることができる。その結果、EGR制御弁自体の小型化を実現することもできる。 Also, since the seal member 7 that is in sliding contact with the rotating shaft 2 does not contact the cage 60, it is possible to prevent an increase in the operating torque of the roller bearing that may occur when the seal member contacts the cage or the roller. Thereby, since the raise of the operating torque of an EGR control valve can be prevented, the motor for an operation can be reduced in size. As a result, the EGR control valve itself can be reduced in size.
 また、図2~図4、図6、図7、および図8のように、フランジ部52の軸方向外側において、シール部材が回転軸2とハウジング1との間の環状空間を塞ぐ形態の場合、排気ガス等の腐食性流体との接触による外輪5の腐食を防止することができる。 Further, as shown in FIGS. 2 to 4, 6, 7, and 8, when the sealing member closes the annular space between the rotating shaft 2 and the housing 1 on the outer side in the axial direction of the flange portion 52. Corrosion of the outer ring 5 due to contact with a corrosive fluid such as exhaust gas can be prevented.
 このように、ころ軸受4が排気ガスを封止するためのシール部材7を備えている場合、軸受から離れて配置される、単体としてのシール部材を別途設けなくてもよい。したがって、2連の玉軸受によって回転軸を回転自在に支持する構成に比べて、支持機構の軸方向長さを短くすることができる。その結果、ハウジング1をコンパクトにできるため、EGR制御弁を小型化することが可能となる。 Thus, when the roller bearing 4 is provided with the seal member 7 for sealing the exhaust gas, it is not necessary to provide a separate seal member that is disposed away from the bearing. Therefore, the axial length of the support mechanism can be shortened as compared with the configuration in which the rotary shaft is rotatably supported by the double ball bearings. As a result, since the housing 1 can be made compact, the EGR control valve can be downsized.
 なお、ころ軸受4の用途は、自動車のEGR制御弁に限定されない。ころ軸受4を適用し得る流体制御弁としては、たとえば、i)自動車の電子制御スロットルバルブのような吸気流量制御弁、ii)排ガス再循環クーラの出口側に設置される低温排気ガス流路と循環排ガスを排ガス再循環クーラより迂回させるバイパス流路(高温排気ガス流路)とを切り替える排気ガス流路切換弁、iii)エンジンの排気管(ターボチャージャのタービンハウジング)に設置される排気ガス流量(圧力)制御弁が挙げられる。あるいは、排気絞り弁または排気ブレーキ弁などの、他種の排気制御弁に、ころ軸受4を適用してもよい。 In addition, the use of the roller bearing 4 is not limited to the EGR control valve of an automobile. The fluid control valve to which the roller bearing 4 can be applied includes, for example, i) an intake flow rate control valve such as an electronically controlled throttle valve of an automobile, ii) a low-temperature exhaust gas passage installed on the outlet side of the exhaust gas recirculation cooler, Exhaust gas flow path switching valve for switching a bypass flow path (high temperature exhaust gas flow path) for bypassing the circulating exhaust gas from the exhaust gas recirculation cooler, iii) Exhaust gas flow rate installed in the exhaust pipe of the engine (turbo housing of the turbocharger) (Pressure) control valve. Alternatively, the roller bearing 4 may be applied to other types of exhaust control valves such as an exhaust throttle valve or an exhaust brake valve.
 また、ころ軸受4が適用される流体制御弁は、自動車以外の車両または装置の制御弁であってもよい。たとえば、燃料電池のエア制御弁が挙げられる。 Further, the fluid control valve to which the roller bearing 4 is applied may be a control valve of a vehicle or a device other than an automobile. For example, an air control valve of a fuel cell can be mentioned.
 (変形例1)
 上記実施の形態では、ころ軸受4の軸方向一方側にのみシール部材7が備えられることとしたが、図11に示すころ軸受4Aのように、軸方向他方側にもシール部材8を有していてもよい。シール部材8は、内向きフランジ部53の内側に、ころ6と対面して配置される公知のシール部材である。この場合、軸受内部にグリースを充填することができる。ころ軸受4をEGR制御弁に用いる場合、グリースの種類としては、たとえばウレアグリース、フッ素グリースなど、高温環境で使用可能な種類を用いることが望ましい。
(Modification 1)
In the above embodiment, the seal member 7 is provided only on one side of the roller bearing 4 in the axial direction. However, like the roller bearing 4A shown in FIG. It may be. The seal member 8 is a known seal member that is disposed inside the inward flange portion 53 so as to face the roller 6. In this case, grease can be filled inside the bearing. When the roller bearing 4 is used for an EGR control valve, it is desirable to use a grease that can be used in a high temperature environment such as urea grease or fluorine grease.
 なお、図11に示すころ軸受4Aによれば、他方側のシール部材8は保持器60に接触する可能性があるものの、双方のシール部材が保持器60に接触し得る構成に比べて、少なくとも一方のシール部材7の摩耗を防止できる利点がある。 According to the roller bearing 4 </ b> A shown in FIG. 11, the seal member 8 on the other side may come into contact with the cage 60, but at least as compared with the configuration in which both seal members can contact the cage 60. There is an advantage that wear of one seal member 7 can be prevented.
 (変形例2)
 ころ軸受は、保持器60を備えていなくてもよい。この場合、外輪5のフランジ部52によって、ころ6の軸方向一方側への移動が規制される。したがって、シール部材7はころ6と接触しないため、ころ6との接触によるシール部材7の摩耗を防止することができる。
(Modification 2)
The roller bearing may not include the cage 60. In this case, the movement of the roller 6 to one side in the axial direction is restricted by the flange portion 52 of the outer ring 5. Therefore, since the seal member 7 does not contact the roller 6, wear of the seal member 7 due to contact with the roller 6 can be prevented.
 (変形例3)
 また、ころ軸受の外輪は、軸方向両端部に、シール部材を保持可能なフランジ部を有していてもよい。つまり、ころ軸受の外輪の軸方向他方側には、上記した内向きフランジ部53に代えて、軸方向一方側に配置されたフランジ部52と同様の構造の鍔を設けてもよい。
(Modification 3)
Moreover, the outer ring | wheel of the roller bearing may have the flange part which can hold | maintain a sealing member in the axial direction both ends. That is, a flange having the same structure as that of the flange portion 52 disposed on one side in the axial direction may be provided on the other axial side of the outer ring of the roller bearing, instead of the inward flange portion 53 described above.
 (変形例4)
 あるいは、ころ軸受の外輪の軸方向他方側には、鍔自体設けられていなくてもよい。つまり、外輪は、軸方向一方端部にのみフランジ部52としての鍔を有していてもよい。すなわち、ころ軸受は、シェル形ころ軸受ではなく、円筒ころ軸受であってもよい。
(Modification 4)
Alternatively, the flange itself may not be provided on the other axial side of the outer ring of the roller bearing. That is, the outer ring may have a flange as the flange portion 52 only at one end portion in the axial direction. That is, the roller bearing may be a cylindrical roller bearing instead of a shell roller bearing.
 今回開示された実施の形態はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は上記した説明ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
 1 ハウジング、2 回転軸、3 玉軸受、4,4A ころ軸受、5 外輪、6 ころ、7,7A,7B,7C,7D,7E,8 シール部材、11 排気ガス流路、12 孔部、13 弁体、14 環状隙間、51 円筒部、52,52A フランジ部、52a 第1の部分、52b 第2の部分、53 内向きフランジ部、60 保持器、71 内径側シール部、72 外径側シール部、73 外側シール部、74 リップ。 DESCRIPTION OF SYMBOLS 1 Housing, 2 Rotating shaft, 3 Ball bearing, 4, 4A roller bearing, 5 Outer ring, 6 Roller, 7, 7A, 7B, 7C, 7D, 7E, 8 Seal member, 11 Exhaust gas flow path, 12 Hole part, 13 Valve body, 14 annular gap, 51 cylindrical part, 52, 52A flange part, 52a first part, 52b second part, 53 inward flange part, 60 retainer, 71 inner diameter side seal part, 72 outer diameter side seal Part, 73 outer seal part, 74 lip.

Claims (13)

  1.  内周面が軌道面を構成する円筒部と、前記円筒部の少なくとも軸方向一方端部に連結されたフランジ部とを有する外輪と、
     前記円筒部の前記軌道面上を転動し、回転要素を回転自在に支持する複数のころと、
     前記フランジ部によって保持されたシール部材とを備え、
     前記フランジ部は、前記円筒部の端部から径方向内側に向かって延びる第1の部分と、前記第1の部分の径方向内側端部から軸方向外側に向かって延びる第2の部分とを有する、ころ軸受。
    An outer ring having a cylindrical portion whose inner peripheral surface constitutes a raceway surface, and a flange portion connected to at least one axial end of the cylindrical portion;
    A plurality of rollers that roll on the raceway surface of the cylindrical portion and rotatably support the rotating element;
    A seal member held by the flange portion,
    The flange portion includes a first portion extending radially inward from an end portion of the cylindrical portion and a second portion extending axially outward from a radially inner end portion of the first portion. Has a roller bearing.
  2.  前記ころを収容する保持器をさらに備え、
     前記フランジ部は、前記保持器の軸方向移動を規制するように配置されている、請求項1に記載のころ軸受。
    A cage for accommodating the rollers;
    The roller bearing according to claim 1, wherein the flange portion is disposed so as to restrict axial movement of the cage.
  3.  前記保持器は、前記フランジ部の前記第1の部分のうちの径方向内側端部と軸方向に対向している、請求項2に記載のころ軸受。 The roller bearing according to claim 2, wherein the cage is opposed to the radially inner end of the first portion of the flange portion in the axial direction.
  4.  前記シール部材は、前記回転要素の外周面と前記フランジ部の前記第2の部分との間に配置される内径側シール部を含む、請求項1~3のいずれかに記載のころ軸受。 The roller bearing according to any one of claims 1 to 3, wherein the seal member includes an inner diameter side seal portion disposed between an outer peripheral surface of the rotating element and the second portion of the flange portion.
  5.  前記外輪は、ハウジング内に嵌め入れられており、
     前記シール部材は、前記ハウジングの内周面と前記フランジ部の前記第2の部分との間に配置される外径側シール部を含む、請求項1~4のいずれかに記載のころ軸受。
    The outer ring is fitted in a housing;
    The roller bearing according to any one of claims 1 to 4, wherein the seal member includes an outer diameter side seal portion disposed between an inner peripheral surface of the housing and the second portion of the flange portion.
  6.  前記外輪は、ハウジング内に嵌め入れられており、
     前記シール部材は、前記回転要素の外周面と前記ハウジングの内周面との間において、前記フランジ部の前記第2の部分を取り囲むように配置されている、請求項1~3のいずれかに記載のころ軸受。
    The outer ring is fitted in a housing;
    The seal member according to any one of claims 1 to 3, wherein the seal member is disposed so as to surround the second portion of the flange portion between an outer peripheral surface of the rotating element and an inner peripheral surface of the housing. The described roller bearing.
  7.  前記フランジ部の前記第2の部分の板厚は、前記第1の部分の板厚以下である、請求項1~6のいずれかに記載のころ軸受。 The roller bearing according to any one of claims 1 to 6, wherein a plate thickness of the second portion of the flange portion is equal to or less than a plate thickness of the first portion.
  8.  前記シール部材は、前記回転要素の外周面に接するリップを含む、請求項1~7のいずれかに記載のころ軸受。 The roller bearing according to any one of claims 1 to 7, wherein the seal member includes a lip in contact with an outer peripheral surface of the rotating element.
  9.  前記シール部材は、前記外輪が嵌め入れられるハウジングの内周面と前記フランジ部の前記第2の部分との間に配置される第1領域と、前記第1領域の軸方向外側に連なって前記ハウジングの内周面と前記回転要素の外周面との間に配置され、前記回転要素の外周面に接するリップを有する第2領域とを含む、請求項1~3のいずれかに記載のころ軸受。 The seal member includes a first region disposed between an inner peripheral surface of a housing into which the outer ring is fitted and the second portion of the flange portion, and an axially outer side of the first region. The roller bearing according to any one of claims 1 to 3, further comprising: a second region having a lip disposed between an inner peripheral surface of the housing and an outer peripheral surface of the rotating element and in contact with the outer peripheral surface of the rotating element. .
  10.  前記第1領域は、前記フランジ部の前記第1の部分の外側面に接触状態で配置され、
     前記第2領域は、前記フランジ部の前記第2の部分の軸方向外側端面と非接触状態で対面する対面部を有している、請求項9に記載のころ軸受。
    The first region is disposed in contact with the outer surface of the first portion of the flange portion,
    The roller bearing according to claim 9, wherein the second region has a facing portion that faces the axially outer end surface of the second portion of the flange portion in a non-contact state.
  11.  前記対面部は、前記リップの付け根部分を含む、請求項10に記載のころ軸受。 The roller bearing according to claim 10, wherein the facing portion includes a base portion of the lip.
  12.  前記外輪は、ハウジング内に嵌め入れられ、
     前記フランジ部の前記第2の部分の外径面または内径面の軸線が、前記ハウジングの内周面の軸線を中心とした直径0.5mmの仮想円の内側に配置されている、請求項1に記載のころ軸受。
    The outer ring is fitted in a housing;
    The axis of the outer diameter surface or inner diameter surface of the second portion of the flange portion is disposed inside an imaginary circle having a diameter of 0.5 mm centering on the axis of the inner peripheral surface of the housing. The roller bearing described in 1.
  13.  前記外輪は、前記フランジ部を前記円筒部の軸方向一方側にのみ有し、前記円筒部の軸方向他方側には、径方向内側に延びる内向きフランジ部を有している、請求項1~12のいずれかに記載のころ軸受。 The said outer ring | wheel has the said flange part only in the axial direction one side of the said cylindrical part, and has the inward flange part extended in radial direction inner side in the axial direction other side of the said cylindrical part. The roller bearing according to any one of 1 to 12.
PCT/JP2018/022722 2017-06-16 2018-06-14 Roller bearing WO2018230641A1 (en)

Priority Applications (1)

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JP2017-118253 2017-06-16
JP2017118253 2017-06-16
JP2018-097150 2018-05-21
JP2018097150A JP2019002560A (en) 2017-06-16 2018-05-21 Roller bearing

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284145A (en) * 1965-06-07 1966-11-08 Mcgill Mfg Company Inc Sealed anti-friction bearing
DE1976866U (en) * 1967-05-24 1968-01-11 Schaeffler Ohg Industriewerk THIN-WALLED, IN PARTICULAR MANUFACTURED NEEDLE BEARING BUSHINGS.
JP2008232219A (en) * 2007-03-19 2008-10-02 Jtekt Corp Drawn cup roller bearing and method of producing drawn cup roller bearing
US9388772B2 (en) 2011-03-10 2016-07-12 Schaeffler Technologies AG & Co. KG Needle sleeve for pivotably mounting the throttle valve shaft of a control device for recirculating exhaust gas in internal combustion engines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284145A (en) * 1965-06-07 1966-11-08 Mcgill Mfg Company Inc Sealed anti-friction bearing
DE1976866U (en) * 1967-05-24 1968-01-11 Schaeffler Ohg Industriewerk THIN-WALLED, IN PARTICULAR MANUFACTURED NEEDLE BEARING BUSHINGS.
JP2008232219A (en) * 2007-03-19 2008-10-02 Jtekt Corp Drawn cup roller bearing and method of producing drawn cup roller bearing
US9388772B2 (en) 2011-03-10 2016-07-12 Schaeffler Technologies AG & Co. KG Needle sleeve for pivotably mounting the throttle valve shaft of a control device for recirculating exhaust gas in internal combustion engines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3640489A4 *

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