WO2024013843A1 - Dispositif de palier à roulement - Google Patents

Dispositif de palier à roulement Download PDF

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Publication number
WO2024013843A1
WO2024013843A1 PCT/JP2022/027390 JP2022027390W WO2024013843A1 WO 2024013843 A1 WO2024013843 A1 WO 2024013843A1 JP 2022027390 W JP2022027390 W JP 2022027390W WO 2024013843 A1 WO2024013843 A1 WO 2024013843A1
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WO
WIPO (PCT)
Prior art keywords
groove
outer diameter
bearing
diameter surface
rolling bearing
Prior art date
Application number
PCT/JP2022/027390
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English (en)
Japanese (ja)
Inventor
肇 渡邉
Original Assignee
株式会社ジェイテクト
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 株式会社ジェイテクト filed Critical 株式会社ジェイテクト
Priority to PCT/JP2022/027390 priority Critical patent/WO2024013843A1/fr
Publication of WO2024013843A1 publication Critical patent/WO2024013843A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • 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
    • F16C19/06—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 a single row or 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
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • 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
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such

Definitions

  • the present invention relates to a rolling bearing device.
  • Rolling bearings are also required to have sensing functions. For example, if it is possible to detect the cutting load applied to the rolling bearing that supports the main spindle of a machine tool, it will be possible to reduce tool wear by optimizing machining conditions, shorten machining time, and prevent failures by detecting abnormal machining. etc.
  • a spacer mounting ring
  • the wiring of the sensor element passes through one inner ring and is drawn out to the outside.
  • the inner ring and the spacer are not integrated. For this reason, for example, if the inner ring and spacer are separated in the axial direction when the bearing device is assembled into mechanical equipment, there is a risk that the wiring of the sensor element may be disconnected. As a measure to prevent such disconnection, it is possible to bond the side surface of the inner ring and the side surface of the spacer with adhesive. However, when adhesive is used, the side surface of the spacer may be inclined with respect to the side surface of the inner ring. In that case, the coaxiality between the inner ring and the spacer may deteriorate, and the detection accuracy of the sensor may deteriorate.
  • the present disclosure has been made in view of the above circumstances, and aims to provide a rolling bearing device that can suppress wiring breakage while maintaining the coaxiality of two adjacent annular members. purpose.
  • the rolling bearing device of the present disclosure includes a pair of outer rings arranged adjacent to each other in the axial direction, and wiring arranged to pass from the outer diameter surface of one of the outer rings to the outer diameter surface of the other bearing. and a connecting member disposed across the one bearing outer diameter surface and the other bearing outer diameter surface, the connecting member being arranged between the one bearing outer diameter surface and the other bearing outer diameter surface. Each is fixed.
  • FIG. 1 is a sectional view of a rolling bearing device according to a first embodiment.
  • FIG. 3 is an enlarged sectional view of a rolling bearing. It is a perspective view showing a pair of rolling bearings and a spacer.
  • FIG. 3 is a perspective view showing the housing.
  • FIG. 7 is a perspective view showing a pair of rolling bearings and a spacer of a rolling bearing device according to a second embodiment.
  • FIG. 7 is a perspective view showing a housing of a rolling bearing device according to a second embodiment.
  • the rolling bearing device of the embodiment includes a pair of outer rings that are arranged adjacent to each other in the axial direction, and is arranged such that the outer ring passes from the outer diameter surface of one of the outer rings to the outer diameter surface of the other bearing.
  • a connecting member disposed across the outer diameter surface of the one bearing and the outer diameter surface of the other bearing, the connecting member being arranged between the outer diameter surface of the one bearing and the outer diameter surface of the other bearing.
  • the connecting member is fixed to the outer diameter surface of one of the outer rings and the outer diameter surface of the other bearing, it is possible to prevent the outer rings from separating from each other in the axial direction. . Thereby, it is possible to suppress disconnection of the wiring arranged on the outer diameter surfaces of the bearings of both outer rings. Furthermore, since there is no need to bond the side surfaces of both outer rings with adhesive, the coaxiality of the pair of outer rings (annular members) can be maintained. In particular, when it is necessary to control the coaxiality between the side surfaces of both outer rings at a micron level, a configuration using a connecting member is more effective.
  • the rolling bearing device of (1) further includes a cylindrical housing having an inner peripheral surface to which the pair of outer rings is attached, and the inner peripheral surface of the housing has a groove for accommodating the wiring.
  • the connecting member is disposed within the groove.
  • the connecting member since the connecting member is disposed within the groove of the housing that accommodates the wiring, it is possible to prevent the connecting member from interfering with the housing when attaching the pair of outer rings to the inner peripheral surface of the housing.
  • a general-purpose outer ring can be used.
  • the one bearing outer diameter surface has a first groove that accommodates the wiring
  • the other bearing outer diameter surface has a first groove
  • the other bearing outer diameter surface has a first groove
  • the other bearing outer diameter surface has a first groove that accommodates the wiring.
  • a second groove that communicates with the wire and accommodates the wiring
  • the connecting member is disposed within the first groove and the second groove, and is fixed to the first groove and the second groove; It is preferable to be there.
  • the connecting member is arranged in the first groove and the second groove of the pair of outer rings that accommodate the wiring, so that when the pair of outer rings is attached to the inner circumferential surface of the housing, for example, the connecting member is connected to the housing. Interference can be suppressed.
  • the rolling bearing device according to any one of (1) to (3) above further includes a sensor attached to the outer diameter surface of the one bearing, and the wiring is a lead wire of the sensor. .
  • the wiring is a lead wire of the sensor.
  • FIG. 1 is a sectional view of a rolling bearing device 1 according to a first embodiment.
  • the rolling bearing device 1 is used, for example, to support a main shaft (spindle) 50 of a machine tool.
  • the rolling bearing device 1 includes a housing 2, a plurality of rolling bearings 3, a spacer 4, a plurality of sensors 5, and a plurality of connection members 6 (see FIG. 3).
  • the direction along the central axis C of the rolling bearing 3 is the axial direction of the rolling bearing 3, and is simply referred to as the "axial direction.”
  • the axial direction also includes a direction parallel to the central axis C.
  • the axial left side of FIG. 1 will be referred to as the "axial first side”
  • the axial right side of FIG. 1 will be referred to as the "axial second side.”
  • the direction perpendicular to the central axis C is the radial direction of the rolling bearing 3, and is simply referred to as the "radial direction.”
  • the direction in which the inner ring 32 of the rolling bearing 3 rotates about the central axis C is the circumferential direction of the rolling bearing 3, and is simply referred to as the "circumferential direction.”
  • the housing 2 is formed into a cylindrical shape and surrounds the main shaft 50.
  • a plurality of rolling bearings 3 are arranged between the housing 2 and the main shaft 50.
  • the pair of rolling bearings 3 are arranged adjacent to each other in the axial direction.
  • FIG. 2 is an enlarged sectional view of the rolling bearing 3.
  • the rolling bearing 3 of this embodiment is an angular contact ball bearing.
  • the rolling bearing 3 includes an outer ring 31 that is a fixed ring, an inner ring 32 that is a rotating ring, a plurality of balls (rolling elements) 33, and an annular cage 34.
  • An outer ring raceway 31a is formed on the inner peripheral surface of the outer ring 31.
  • the outer ring raceway 31a is a raceway groove in which the balls 33 roll.
  • the outer ring 31 has a shoulder drop portion 31c on the first axial side of the outer ring raceway 31a.
  • the outer ring 31 has a shoulder 31b on the second axial side of the outer ring raceway 31a.
  • the inner diameter of the shoulder 31b is smaller than the inner diameter of the shoulder drop portion 31c.
  • a bearing outer diameter surface (outer peripheral surface) 31d of the outer ring 31 is fitted and attached to the inner peripheral surface 2a of the housing 2 (see FIG. 1).
  • a side surface 31j on the first axial side of the outer ring 31 is a front surface 31j.
  • a side surface 31e on the second axial side of the outer ring 31 is a back surface 31e.
  • the inner ring 32 is arranged radially inward of the outer ring 31 and concentrically with the outer ring 31.
  • An inner ring raceway 32a is formed on the outer peripheral surface of the inner ring 32.
  • the inner ring raceway 32a is a raceway groove in which the balls 33 roll.
  • the inner ring 32 has a first shoulder 32c on a first axial side of the inner ring raceway 32a.
  • the inner ring 32 has a second shoulder 32b on the second axial side of the inner ring raceway 32a.
  • the outer diameter of the first shoulder 32c and the outer diameter of the second shoulder 32b are the same.
  • a bearing inner diameter surface (inner peripheral surface) 32d of the inner ring 32 is fitted to an outer peripheral surface 50a (see FIG. 1) of the main shaft 50.
  • a side surface 32j on the first axial side of the inner ring 32 is a front surface 32j.
  • a side surface 32e on the second axial side of the inner ring 32 is a back
  • the plurality of balls 33 are arranged in an annular space between the outer ring 31 and the inner ring 32.
  • the retainer 34 includes a pair of annular bodies 35 and a plurality of columns 36 that connect the annular bodies 35.
  • the pillars 36 are arranged at equal intervals in the circumferential direction.
  • a pocket 37 is formed between a pair of adjacent pillars 36, 36 and between a pair of annular bodies 35, 35. Each pocket 37 accommodates each ball 33.
  • the holder 34 holds the plurality of balls 33 at equal intervals along the circumferential direction.
  • the rolling bearing 3 disposed on the first axial side is referred to as “one rolling bearing 3”
  • the rolling bearing 3 disposed on the second axial side is hereinafter referred to as “the other rolling bearing 3”.
  • the outer ring 31 of one rolling bearing 3 is also referred to as “one outer ring 31”
  • the outer ring 31 of the other rolling bearing 3 is also referred to as “other outer ring 31”.
  • the bearing outer diameter surface 31d of one outer ring 31 is also referred to as “one bearing outer diameter surface 31d”
  • the bearing outer diameter surface 31d of the other outer ring 31 is also referred to as "the other bearing outer diameter surface 31d”.
  • the back surface 31e of the outer ring 31 of one rolling bearing 3 and the front surface 31j of the outer ring 31 of the other rolling bearing 3 are in surface contact without using an adhesive.
  • the back surface 32e of the inner ring 32 of one rolling bearing 3 and the front surface 32j of the inner ring 32 of the other rolling bearing 3 are in surface contact without using an adhesive.
  • the spacer 4 is arranged adjacent to the second axial side of the other rolling bearing 3.
  • the spacer 4 is an annular member.
  • a side surface 4d on the first axial side of the spacer 4 is bonded to the back surface 32e of the other outer ring 31 with an adhesive.
  • the outer peripheral surface 4a of the spacer 4 is fitted into the inner peripheral surface 2a of the housing 2.
  • the inner diameter of the spacer 4 is larger than the outer diameter of the main shaft 50.
  • FIG. 3 is a perspective view showing a pair of rolling bearings 3 and a spacer 4.
  • a plurality of sensors 5 are mounted on a bearing outer diameter surface 31d of one outer ring 31 at equal intervals in the circumferential direction.
  • the sensor 5 of this embodiment is a sensor that detects distortion of one outer ring 31.
  • the sensor 5 includes a strain gauge 5a and a pair of wires 5b.
  • the strain gauge 5a is bonded to the bearing outer diameter surface 31d of one outer ring 31 with an adhesive.
  • the wiring 5b is a lead wire extending from the strain gauge 5a.
  • the pair of wiring lines 5b is arranged to pass from one bearing outer diameter surface 31d to the other bearing outer diameter surface 31d.
  • no adhesive is present between the back surface 31e of the outer ring 31 of one rolling bearing 3 and the front surface 31j of the outer ring 31 of the other rolling bearing 3.
  • Axial grooves 4b are formed on the first axial side of the outer peripheral surface 4a of the spacer 4 at equal intervals in the circumferential direction.
  • the number of axial grooves 4b is the same as the number of sensors 5.
  • These axial grooves 4b are formed to extend in the axial direction at positions corresponding to the respective sensors 5 in the circumferential direction.
  • a circumferential groove 4c is formed on the second axial side of the outer circumferential surface 4a of the spacer 4 over the entire circumferential direction.
  • the circumferential groove 4c communicates with all the axial grooves 4b on its first axial side.
  • the circumferential groove 4c is formed from the other axial end of the axial groove 4b to the second axial side surface of the spacer 4.
  • the circumferential groove 4c is formed deeper in the radial direction than each axial groove 4b.
  • a pair of wires 5b of each sensor 5 passes through the corresponding axial groove 4b of the spacer 4 and extends to the circumferential groove 4c.
  • the same number of terminal blocks 11 as the sensors 5 are fixed to the bottom surface of the circumferential groove 4c at equal intervals in the circumferential direction.
  • a pair of wires 5b of each sensor 5 is electrically connected to the top surface of each terminal block 11.
  • Each pair of signal lines 12 is electrically connected to the upper surface of the terminal block 11, respectively.
  • Each signal line 12 is electrically connected to each wiring 5b.
  • Each pair of signal lines 12 is arranged along the circumferential direction within the circumferential groove 4c. All the signal lines 12 are bundled at one location in the circumferential direction. All the signal lines 12 are covered with a shield 13 at a portion opposite to each terminal block 11 from one circumferential location where they are bundled.
  • FIG. 3 shows only some of the signal lines 12 among the plurality of signal lines 12 (the same applies to FIG. 5).
  • a plurality of connecting members 6 are attached to one bearing outer diameter surface 31d and the other bearing outer diameter surface 31d at equal intervals in the circumferential direction.
  • the plurality of connecting members 6 are the same in number as the sensors 5.
  • Each connecting member 6 is arranged close to each sensor 5 in the circumferential direction.
  • Each connecting member 6 is made of a member having rigidity in the axial direction. Further, each connecting member 6 has a size that fits in a later-described accommodation groove 2c of the housing 2.
  • Each connecting member 6 in this embodiment is made of a thin metal plate.
  • Each connecting member 6 is arranged so as to extend linearly along the axial direction across one bearing outer diameter surface 31d and the other bearing outer diameter surface 31d of both outer rings 31.
  • One surface 6a of each connecting member 6 is bonded to one bearing outer diameter surface 31d and the other bearing outer diameter surface 31d with an adhesive. Thereby, each connecting member 6 is fixed to one bearing outer diameter surface 31d and the other bearing outer diameter surface 31d, respectively.
  • FIG. 4 is a perspective view showing the housing 2. 1 and 4, the inner circumferential surface 2a of the housing 2 has a fitting surface 2b and the same number of housing grooves 2c as the sensors 5.
  • the bearing outer diameter surfaces 31d of both outer rings 31 are fitted into the fitting surface 2b.
  • the accommodation groove 2c is a groove that accommodates the sensor 5 (the strain gauge 5a and the pair of wires 5b) attached to the bearing outer diameter surface 31d of both outer rings 31.
  • the housing grooves 2c are formed at equal intervals in the circumferential direction on the fitting surface 2b.
  • the accommodation groove 2c of this embodiment is formed over the entire axial direction of the housing 2 so as to extend linearly along the axial direction.
  • Each connecting member 6 attached to one bearing outer diameter surface 31d and the other bearing outer diameter surface 31d is arranged in each accommodation groove 2c.
  • the inner peripheral surface 2a of the housing 2 further includes a positioning groove 2d formed at a predetermined location in the circumferential direction (12 o'clock position in FIG. 4).
  • a positioning pin 15 is fixed at a predetermined position in the circumferential direction on the outer peripheral surface 4a of the spacer 4 on the first axial side.
  • the positioning pin 15 protrudes radially outward on the outer peripheral surface 4a of the spacer 4.
  • the positioning pin 15 is formed in a size to be inserted into the positioning groove 2d of the housing 2.
  • each sensor 5 and each connecting member 6 are accommodated in each of the plurality of accommodation grooves 2c of the housing 2 by alignment between the positioning pin 15 and the positioning groove 2d. As a result, each sensor 5 and each connection member 6 are prevented from interfering with the housing 2 and being damaged.
  • the connecting member 6 is fixed to one bearing outer diameter surface 31d and the other bearing outer diameter surface 31d of both outer rings 31 of the pair of rolling bearings 3.
  • This connecting member 6 can prevent both outer rings 31 from separating from each other in the axial direction.
  • the back surface 31e of the outer ring 31 of one rolling bearing 3 and the front surface 31j of the outer ring 31 of the other rolling bearing 3 are not bonded with adhesive, so that the pair of outer rings 31 ( The coaxiality between the annular members) and the distance between the pair of outer ring raceways 31a can be adjusted with high accuracy.
  • the connecting member 6 is arranged within the housing groove 2c of the housing 2 that accommodates the wiring 5b of the sensor 5. Therefore, when both outer rings 31 are inserted and attached to the inner peripheral surface 2a of the housing 2, the connecting member 6 does not interfere with the housing 2. Moreover, since there is no groove for arranging the connecting member 6 on the bearing outer diameter surface 31d of each outer ring 31, the rolling bearing device 1 of this embodiment can use a general-purpose outer ring.
  • FIG. 5 is a perspective view showing a pair of rolling bearings 3 and a spacer 4 of the rolling bearing device 1 according to the second embodiment.
  • FIG. 6 is a perspective view showing the housing 2 of the rolling bearing device 1 according to the second embodiment. 5 and 6, in this embodiment, the inner circumferential surface 2a of the housing 2 has only a positioning groove 2d, and the pair of rolling bearings 3 are provided with grooves for accommodating the sensor 5. This is different from the embodiment.
  • the bearing outer diameter surface 31d of one outer ring 31 has a fitting surface 31f and a plurality of first grooves 31g.
  • the bearing outer diameter surface 31d of the other outer ring 31 has a fitting surface 31f and a plurality of second grooves 31h.
  • the number of first grooves 31g and second grooves 31h is the same as the number of sensors 5.
  • the fitting surface 31f of the outer diameter surface 31d of both bearings is fitted into the inner circumferential surface 2a of the housing 2.
  • the first grooves 31g are formed at equal intervals in the circumferential direction on the fitting surface 31f of one bearing outer diameter surface 31d.
  • the first groove 31g is formed over the entire axial direction of one bearing outer diameter surface 31d so as to extend linearly along the axial direction.
  • the second grooves 31h are formed at equal intervals in the circumferential direction on the fitting surface 31f of the other bearing outer diameter surface 31d.
  • the second groove 31h is formed over the entire axial direction of the other bearing outer diameter surface 31d so as to extend linearly along the axial direction.
  • the circumferential width of the second groove 31h is approximately the same as the circumferential width of the first groove 31g.
  • the second groove 31h communicates with the first groove 31g on its first axial side.
  • the second groove 31h communicates with the axial groove 4b of the spacer 4 on its second axial side.
  • the strain gauge 5a of the sensor 5 is bonded to the bottom surface of the first groove 31g with an adhesive.
  • a pair of wiring lines 5b of the sensor 5 are arranged to pass from the first groove 31g to the second groove 31h.
  • the pair of wiring lines 5b extends from the second groove 31h through the axial groove 4b of the spacer 4 to the circumferential groove 4c.
  • the pair of wires 5b of the sensor 5 are accommodated in the first groove 31g, the second groove 31h, the axial groove 4b, and the circumferential groove 4c.
  • Each connecting member 6 is formed to a size that fits in the first groove 31g and the second groove 31h that communicate with each other.
  • Each connecting member 6 is arranged so as to extend linearly along the axial direction across the bottom surface of the first groove 31g and the bottom surface of the second groove 31h, which are in communication with each other.
  • One surface 6a of each connecting member 6 is adhered to the bottom surface of the first groove 31g and the bottom surface of the second groove 31h using an adhesive.
  • no adhesive is present between the back surface 31e of the outer ring 31 of one rolling bearing 3 and the front surface 31j of the outer ring 31 of the other rolling bearing 3.
  • each connecting member 6 is fixed to the bottom surfaces of the first groove 31g and the second groove 31h within the first groove 31g and the second groove 31h.
  • the other configurations of this embodiment are the same as those of the first embodiment, so the same reference numerals are given and the explanation thereof will be omitted.
  • the rolling bearing device 1 of this embodiment has a connecting member connected to one bearing outer diameter surface 31d (first groove 31g) and the other bearing outer diameter surface 31d (second groove 31h) in both outer rings 31 of a pair of rolling bearings 3. 6 is fixed.
  • This connecting member 6 can prevent both outer rings 31 from separating from each other in the axial direction.
  • the rolling bearing device 1 of this embodiment is arranged on the bearing outer diameter surface 31d of both outer rings 31. Disconnection of the wiring 5b of the sensor 5 can be suppressed.
  • the coaxiality of both outer rings 31 can be determined with high precision, and the pair of outer rings Since the distance between the raceways 31a can be adjusted with high accuracy, the rotation accuracy of the rolling bearing 3 does not decrease even though the sensor 5 is fixed to the outer ring 31.
  • the connecting member 6 is arranged in the first groove 31g and the second groove 31h of both outer rings 31 that accommodate the wiring 5b of the sensor 5. Therefore, when the outer rings 31 are inserted and attached to the inner peripheral surface 2a of the housing 2, the connecting member 6 can be prevented from interfering with the housing 2.
  • the rolling bearing device 1 can be applied to other than machine tools.
  • the rolling bearing 3 can be applied not only to angular contact ball bearings but also to deep groove ball bearings and the like.
  • the wiring included in the rolling bearing device 1 is not limited to the wiring 5b of the sensor 5, and may be, for example, power supply wiring.
  • a rolling bearing device 1 is a rolling bearing device in which each accommodation groove 2c of the housing 2 is formed in a spiral shape in the circumferential direction.
  • each connecting member 6 may be arranged spirally in the circumferential direction across one bearing outer diameter surface 31d and the other bearing outer diameter surface 31d of both outer rings 31.
  • the rolling bearing device 1 of the modification of the first embodiment is a rolling bearing device in which the connecting member 6, the first groove 31g, and the second groove 31h are also formed in a spiral shape in the circumferential direction.
  • the connecting member 6 is not limited to a thin metal plate, and may be, for example, a thin plate made of reinforcing fiber, a metal bar member, or the like.
  • the number of connecting members 6 may be less than the number of sensors 5.
  • the connecting member 6 may be fixed to the bearing outer diameter surface 31d of each outer ring 31 with a screw or the like instead of an adhesive.
  • the connecting member 6 may be extended to the axial groove 4b of the spacer 4, and the extended portion may be fixed to the bottom surface of the axial groove 4b. In that case, the back surface 32e of the outer ring 31 and the side surface 4d of the spacer 4 in the other rolling bearing 3 do not need to be bonded with adhesive.
  • a rolling bearing device 1 according to another modification of the first embodiment may have a dedicated groove for arranging the connecting member 6 on the inner circumferential surface 2a of the housing 2 according to the first embodiment.
  • a rolling bearing device 1 according to another modification of the second embodiment may have a dedicated groove on the bearing outer diameter surface 31d of both outer rings 31 for arranging the connecting member 6.
  • the axial groove 4b of the spacer 4 may be formed on the inner peripheral surface 2a of the housing 2.
  • the rolling bearing 3 may not include the spacer 4.
  • the rolling bearing device 1 is configured such that, for example, a plurality of grooves extending in the entire radial direction are formed on the inner surface of the second axial side of the housing 2, and the wiring 5b of each sensor 5 is passed through each of the grooves. You can also pull it out.
  • Rolling bearing device 2 Housing 2a Inner peripheral surface 2c Accommodating groove (groove) 3 Rolling bearing 5 Sensor 5b Wiring (lead wire) 6 Connecting member 31 Outer ring 31d Bearing outer diameter surface 31g First groove 31h Second groove

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

Abstract

L'invention concerne un dispositif de palier à roulement 1 qui comprend : une paire de bagues externes 31 qui sont disposées adjacentes l'une à l'autre dans une direction axiale ; un câblage 5b qui est disposé de façon à passer d'une surface de diamètre externe de palier 31d de l'une de la paire de bagues externes 31 à une surface de diamètre externe de palier 31d de l'autre ; et des éléments de couplage 6 qui sont disposés dans la surface de diamètre externe de palier 31d à l'autre surface de diamètre externe de palier 31d. Les éléments de couplage (6) sont chacun fixés à la surface de diamètre externe de palier (31d) et à l'autre surface de diamètre externe de palier (31d).
PCT/JP2022/027390 2022-07-12 2022-07-12 Dispositif de palier à roulement WO2024013843A1 (fr)

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PCT/JP2022/027390 WO2024013843A1 (fr) 2022-07-12 2022-07-12 Dispositif de palier à roulement

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Application Number Priority Date Filing Date Title
PCT/JP2022/027390 WO2024013843A1 (fr) 2022-07-12 2022-07-12 Dispositif de palier à roulement

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WO2024013843A1 true WO2024013843A1 (fr) 2024-01-18

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010121639A (ja) * 2008-11-17 2010-06-03 Ntn Corp 車輪用軸受装置
JP2017219099A (ja) * 2016-06-07 2017-12-14 株式会社ジェイテクト 転がり軸受装置
US20210003478A1 (en) * 2019-07-05 2021-01-07 Aktiebolaget Skf Rolling bearing with integrated optical fiber sensor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010121639A (ja) * 2008-11-17 2010-06-03 Ntn Corp 車輪用軸受装置
JP2017219099A (ja) * 2016-06-07 2017-12-14 株式会社ジェイテクト 転がり軸受装置
US20210003478A1 (en) * 2019-07-05 2021-01-07 Aktiebolaget Skf Rolling bearing with integrated optical fiber sensor

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