WO2022210734A1 - 多列軸受及び軸受ユニット - Google Patents

多列軸受及び軸受ユニット Download PDF

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Publication number
WO2022210734A1
WO2022210734A1 PCT/JP2022/015548 JP2022015548W WO2022210734A1 WO 2022210734 A1 WO2022210734 A1 WO 2022210734A1 JP 2022015548 W JP2022015548 W JP 2022015548W WO 2022210734 A1 WO2022210734 A1 WO 2022210734A1
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WO
WIPO (PCT)
Prior art keywords
groove
outer ring
ring raceway
inner ring
row
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/015548
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English (en)
French (fr)
Japanese (ja)
Inventor
孝之 矢部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NSK Ltd
Original Assignee
NSK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NSK Ltd filed Critical NSK Ltd
Priority to US18/285,137 priority Critical patent/US12454980B2/en
Priority to EP22780945.6A priority patent/EP4317720B1/en
Priority to CN202280026382.8A priority patent/CN117157466A/zh
Priority to JP2023511391A priority patent/JP7816343B2/ja
Publication of WO2022210734A1 publication Critical patent/WO2022210734A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/08—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with two or more rows of balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/56—Systems consisting of a plurality of bearings with rolling friction in which the rolling bodies of one bearing differ in diameter from those of another
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C31/00—Bearings for parts which both rotate and move linearly
    • F16C31/04—Ball or roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F16C33/585—Details of specific parts of races of raceways, e.g. ribs to guide the rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • F16C43/06—Placing rolling bodies in cages or bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/60—Shaping by removing material, e.g. machining
    • F16C2220/70—Shaping by removing material, e.g. machining by grinding

Definitions

  • the present invention relates to a multi-row bearing and a bearing unit, and in particular, a multi-row bearing capable of machining the raceway grooves with high accuracy by enabling easy and accurate measurement of the axial dimension between the raceway grooves of the multi-row bearing. It relates to bearings and bearing units.
  • Patent Document 1 discloses a multi-row bearing having multi-row raceway grooves in the inner and outer rings of the bearing.
  • the raceway groove is formed over one groove shoulder in the axial direction of the raceway groove.
  • a thrust and radial bearing is disclosed in which the inner ring is inserted into the outer ring, the balls are inserted between the respective raceway grooves through the radial holes opened in the outer ring, and then the outer ring is moved in the axial direction for assembly. .
  • the measuring tool 50 has a pair of steel balls 55 and 56 engaged with a raceway groove serving as a reference for measurement to stably hold the measuring tool 50, and then a probe 57 is placed on the track for measurement. It is configured to press against the grooves to measure the axial distance between the raceway grooves.
  • the reference track grooves are formed on both sides of the groove bottom.
  • each raceway groove of the outer ring is formed only from the groove bottom to the groove shoulder on one side in the axial direction.
  • the tools 50 could not be stably installed, the measured values became unstable, and it was difficult to machine the outer ring with high dimensional accuracy between the raceway grooves.
  • the present invention has been made in view of the above-described problems, and its object is to measure the axial dimension between raceway grooves with high accuracy, simply, and in a short period of time.
  • An object of the present invention is to provide a multi-row bearing that can be machined with high dimensional accuracy and a bearing unit comprising the multi-row bearing.
  • the above object of the present invention is achieved by the following configuration [1] relating to a multi-row bearing.
  • a multi-row bearing comprising The inner ring raceway groove at one end in the axial direction is formed over groove shoulders on both sides in the axial direction with respect to the groove bottom, The inner ring raceway groove in the axially intermediate portion is formed from the groove bottom to the groove shoulder on one side in the axial direction, The outer ring raceway groove at the other end in the axial direction is formed over groove shoulders on both sides in the axial direction with respect to the groove bottom,
  • a multi-row bearing, wherein the outer ring raceway groove in the axially intermediate portion is formed from a groove bottom to a groove shoulder on one side in the axial direction.
  • the above object of the present invention is achieved by the following configuration [2] relating to the bearing unit.
  • [2] a ball screw mechanism; a multi-row bearing according to [1] above, The bearing unit, wherein the nut of the ball screw mechanism constitutes the inner ring.
  • the axial dimension between the raceway grooves can be measured with high accuracy, simply and in a short period of time.
  • Raceway grooves of row bearings can be machined.
  • a compact and inexpensive bearing unit having the multi-row bearing and capable of coping with a high load can be obtained.
  • FIG. 1 is a sectional view showing a state before assembly of a multi-row bearing having three rows of raceway grooves.
  • FIG. 2 is a cross-sectional view showing a state after assembly of the multi-row bearing shown in FIG.
  • FIG. 3(a) is a side view of a measuring tool for measuring the axial dimension between raceway grooves of a multi-row bearing, and
  • FIG. It is a side view which shows the state which measures a dimension.
  • FIG. 4 is a sectional view showing a state before assembly of a multi-row bearing having four rows of raceway grooves.
  • FIG. 5 is a cross-sectional view showing a state after assembly of the multi-row bearing shown in FIG.
  • FIG. 1 is a cross-sectional view showing a state before assembly of a multi-row bearing according to the first embodiment of the present invention
  • FIG. 2 is a cross-sectional view showing a state after assembly of the multi-row bearing.
  • the left direction in the drawings is one side, and the right direction is the other side.
  • a bearing unit 100 includes a multi-row bearing 10 and a ball screw mechanism 40 using an inner ring 30 of the multi-row bearing 10 as a nut. .
  • a multi-row bearing 10 includes an outer ring 20 having three rows of outer ring raceway grooves 21a, 21b, and 21c on its inner peripheral surface, and an inner ring 30 having three rows of inner ring raceway grooves 31a, 31b, and 31c on its outer peripheral surface. and a plurality of balls 45 that are rollably disposed between the outer ring raceway grooves 21a, 21b, 21c and the inner ring raceway grooves 31a, 31b, 31c.
  • the outer ring raceway groove 21a formed at the other axial end of the outer ring 20 extends over the groove shoulders on both sides in the axial direction. Specifically, it is formed symmetrically with respect to the groove bottom.
  • Two outer ring raceway grooves 21b and 21c, which are respectively formed in the axially intermediate portion and the end portion on one axial side of the outer ring 20, are formed from the groove bottom to the groove shoulder on one axial side (the other side). It is Specifically, the raceway grooves 21b and 21c are formed only on the other side of the groove bottom.
  • the outer ring raceway groove 21a has a substantially semi-circular cross-sectional raceway groove
  • the outer ring raceway grooves 21b and 21c have a substantially quarter-circular cross-sectional raceway groove formed on the other side of the outer ring 20. As shown in FIG.
  • a cylindrical surface 21e is formed that continues from the groove bottom of the outer ring raceway groove 21b.
  • a cylindrical surface 21f is also formed on one side in the axial direction of the outer ring raceway groove 21c, continuing from the groove bottom of the outer ring raceway groove 21c.
  • the inner diameter of the groove bottom of the outer ring raceway groove 21b and the inner diameter of the cylindrical surface 21e, and the inner diameter of the groove bottom of the outer ring raceway groove 21c and the inner diameter of the cylindrical surface 21f are substantially the same diameter.
  • the cylindrical surface 21e is provided with an opening 22 penetrating in the radial direction.
  • the inner diameters of the cylindrical surfaces 21e and 21f may be different from the inner diameters of the outer ring raceway grooves 21b and 21c as long as they are dimensioned so as not to interfere with the balls during assembly of the balls, which will be described later.
  • the inner ring 30 is also a nut of the ball screw mechanism 40 as will be described later.
  • An inner ring raceway groove 31a formed at one end of the inner ring main body 31 extends over groove shoulders on both sides in the axial direction. Specifically, the inner ring raceway groove 31a is formed symmetrically with respect to the groove bottom.
  • the inner ring raceway groove 31b formed in the axially intermediate portion of the inner ring 30 is formed from the groove bottom to the axially one side (one side) of the groove shoulder. Specifically, the raceway groove is formed only on one side with respect to the groove bottom.
  • a cylindrical surface 31f is formed on the other side of the inner ring raceway groove 31b, continuing from the groove bottom of the inner ring raceway groove 31b.
  • the outer diameter of the groove bottom of the inner ring raceway groove 31b and the outer diameter of the cylindrical surface 31f are substantially the same diameter.
  • the inner diameter of the cylindrical surface 31f may be different from the inner diameter of the inner ring raceway groove 31b as long as it does not interfere with the balls when the balls are assembled as described later.
  • the presser lid 32 is a member that is fixed to the inner ring main body 31 and forms an inner ring raceway groove 31c, and a raceway groove having a substantially 1/4 circular cross section that becomes the inner ring raceway groove 31c is formed at one outer diameter corner portion.
  • the presser lid 32 has a threaded hole 36 through which a bolt (not shown) is inserted to be screwed into a female screw 35 provided on the bottom portion 33 of the inner ring body 31 to fix the presser lid 32 to the inner ring body 31 . is provided.
  • a ball screw groove 41 (nut-side ball screw groove) of the ball screw mechanism 40 is formed on the inner peripheral surface of the bottomed hole 34 of the inner ring main body 31 , and the inside of the bottomed hole 34 rotatably accommodates a ball screw shaft 43 having a ball screw groove 42 (screw shaft side ball screw groove) formed on its outer peripheral surface.
  • a plurality of balls are rotatably arranged between the inner ring main body 31 , that is, the ball screw groove 41 of the nut and the ball screw groove 42 of the ball screw shaft 43 .
  • the ball screw mechanism 40 is composed of an inner ring main body 31 having a ball screw groove 41 on the inner peripheral surface and functioning as a nut of the ball screw mechanism 40, a ball screw shaft 43, and balls (not shown),
  • a bearing unit 100 is formed by combining with the row bearing 10 .
  • the outer ring 20 is put on the inner ring 30 while being slightly shifted to the other side. In this state, the opening 22 of the outer ring 20 is positioned corresponding to the inner ring raceway groove 31b.
  • a plurality of balls 45 are loaded from one side between the inner ring raceway groove 31a and the cylindrical surface 21f of the outer ring 20. Also, a plurality of balls 45 are loaded from the opening 22 between the inner ring raceway groove 31b and the cylindrical surface 21e. Further, a plurality of balls 45 are loaded into the outer ring raceway groove 21 a from the other side and held by the holding lid 32 .
  • the outer ring 20 is slid to one side together with the holding lid 32, and the holding lid 32 adjusts the gaps between the balls 45 and the outer ring raceway grooves 21a and 31c to a predetermined value.
  • a bolt (not shown) inserted through the threaded hole 36 of the presser lid 32 is screwed into the female screw 35 to fix the presser lid 32 to the inner ring main body 31 .
  • the plurality of balls 45 roll between the respective raceway grooves, that is, between the inner ring raceway groove 31a and the outer ring raceway groove 21c, between the inner ring raceway groove 31b and the outer ring raceway groove 21b, and between the inner ring raceway groove 31c and the outer ring raceway groove 21a. It is arranged movably, and three rows of multi-row bearings 10 are assembled.
  • the ball screw shaft 43 moves relative to the inner ring 30 in the axial direction.
  • a load P indicated by an arrow in the drawing acts on the ball screw shaft 43 . Since the load P is received by the multi-row bearing 10 having multi-row raceway grooves, a large load P can be supported.
  • the axial positions of the three rows of outer ring raceway grooves 21a, 21b, and 21c and the three rows of inner ring raceway grooves 31a, 31b, and 31c must be adjusted with accuracy. A good match is required. In other words, the machining accuracy of the outer ring raceway grooves 21a, 21b, 21c and the inner ring raceway grooves 31a, 31b, 31c greatly affects the performance of the multi-row bearing .
  • the inner ring raceway grooves 31a, 31b, 31c are formed on the outer peripheral side, they are relatively easy to measure and machine. Therefore, it is necessary to measure and adjust the axial dimension between the raceway grooves during machining. Therefore, the dimension between the raceway grooves must be measured many times during machining, and the measuring tool is required to be able to measure easily and accurately in a short time.
  • the axial dimension between the raceway grooves is measured by a dedicated measuring tool 50, as shown in FIG.
  • a case of measuring the axial dimension between the raceway grooves of the outer ring 20 will be described below as an example.
  • the measuring tool 50 includes a fixed arm 52 fixed to a support shaft 51 , a movable arm 53 swingable around the support shaft 51 , and and a measuring arm 54 provided slidably.
  • Steel balls 55 and 56 having the same size as the ball 45 used in the multi-row bearing 10 are attached to the tips of the fixed arm 52 and the movable arm 53.
  • a probe (steel ball) 57 having the same size as the ball 45 used in is attached.
  • the distance between the steel balls 55 and 56 is narrowed and inserted into the inner diameter of the outer ring 20. Then, as shown in FIG. 3B, the steel balls 55 and 56 of the fixed arm 52 and the movable arm 53 are fitted into the pair of outer ring raceway grooves 21a of the outer ring 20 facing each other to stabilize the measuring tool 50. to hold. That is, the outer ring raceway groove 21a of the outer ring 20, in which raceway grooves are formed on both sides of the groove bottom, serves as a reference groove for measuring the distance between the raceway grooves.
  • the movable arm 53 is extended and contracted in the direction of the arrow to engage the probe 57 with the outer ring raceway groove 21b or 21c to measure the movement distance of the measuring arm 54.
  • the outer ring raceway grooves 21b and 21c can be machined with high precision using the groove 21a as a reference.
  • FIG. 1 a multi-row bearing 10 according to a second embodiment of the invention will be described with reference to FIGS. 4 and 5.
  • FIG. 1 In a multi-row bearing 10 according to the second embodiment, four rows of outer ring raceway grooves 21a, 21b, 21c, and 21d are formed on the inner peripheral surface of an outer ring 20, and outer ring raceway grooves 21a, 21b are formed on the outer peripheral surface of an inner ring 30. , 21c and 21d, four rows of inner ring raceway grooves 31d, 31c, 31b and 31a are formed.
  • the outer ring raceway grooves 21a, 21b, 21c, and 21d of the outer ring 20 are positioned between the outer ring raceway grooves 21a and 21d formed at one end and the other end.
  • 21b and 21c are formed with cylindrical surfaces 21e that are continuous from the groove bottoms of the outer ring raceway grooves 21b and 21c, respectively, and these two cylindrical surfaces 21e are provided with openings 22 penetrating in the radial direction. .
  • the axial dimension between the raceway grooves can be accurately measured in a short time by using the measuring tool 50 shown in FIG. 3 with the outer ring raceway groove 21a as a reference.
  • the other outer ring raceway grooves 21b, 21c, and 21d can be machined with high precision using the outer ring raceway groove 21a as a reference.
  • the configuration is also similar to that of the multi-row bearing 10 of the first embodiment. In this case, since the multi-row bearing 10 of the second embodiment has four rows of raceway grooves, it can support a larger load than the multi-row bearing 10 of the first embodiment.
  • a multi-row bearing comprising The inner ring raceway groove at one end in the axial direction is formed over groove shoulders on both sides in the axial direction with respect to the groove bottom, The inner ring raceway groove in the axially intermediate portion is formed from the groove bottom to the groove shoulder on one side in the axial direction, The outer ring raceway groove at the other end in the axial direction is formed over groove shoulders on both sides in the axial direction with respect to the groove bottom,
  • a multi-row bearing, wherein the outer ring raceway groove in the axially intermediate portion is formed from a groove bottom to a groove shoulder on one side in the axial direction.
  • the outer ring raceway groove in the axially intermediate portion has a cylindrical surface on the side opposite to the groove shoulder with respect to the groove bottom;
  • a ball screw mechanism a multi-row bearing according to any one of (1) to (4),
  • the bearing unit wherein the nut of the ball screw mechanism constitutes the inner ring.
  • Multi-row bearing 20 Outer rings 21a to 21d Outer ring raceway grooves 21e, 21f, 31f Cylindrical surface 22 Opening 30 Inner ring (nut of ball screw mechanism) 31a to 31d Inner ring raceway groove 32 Holding lid (split inner ring) 40 ball screw mechanism 45 ball (ball) 100 bearing unit

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
PCT/JP2022/015548 2021-03-31 2022-03-29 多列軸受及び軸受ユニット Ceased WO2022210734A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US18/285,137 US12454980B2 (en) 2021-03-31 2022-03-29 Multi-row bearing and bearing unit
EP22780945.6A EP4317720B1 (en) 2021-03-31 2022-03-29 Multi-row bearing and bearing unit
CN202280026382.8A CN117157466A (zh) 2021-03-31 2022-03-29 多列轴承及轴承单元
JP2023511391A JP7816343B2 (ja) 2021-03-31 2022-03-29 多列軸受及び軸受ユニット

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-062354 2021-03-31
JP2021062354 2021-03-31

Publications (1)

Publication Number Publication Date
WO2022210734A1 true WO2022210734A1 (ja) 2022-10-06

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PCT/JP2022/015548 Ceased WO2022210734A1 (ja) 2021-03-31 2022-03-29 多列軸受及び軸受ユニット

Country Status (6)

Country Link
US (1) US12454980B2 (https=)
EP (1) EP4317720B1 (https=)
JP (1) JP7816343B2 (https=)
CN (1) CN117157466A (https=)
TW (1) TWI910334B (https=)
WO (1) WO2022210734A1 (https=)

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JP2021062354A (ja) 2019-10-16 2021-04-22 エス・ピー・ジーテクノ株式会社 円筒状多孔質膜用モジュール

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US20240183400A1 (en) 2024-06-06
JP7816343B2 (ja) 2026-02-18
US12454980B2 (en) 2025-10-28
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CN117157466A (zh) 2023-12-01
JPWO2022210734A1 (https=) 2022-10-06

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