WO2011007804A1 - カムフォロア及びカムフォロアの製造方法 - Google Patents
カムフォロア及びカムフォロアの製造方法 Download PDFInfo
- Publication number
- WO2011007804A1 WO2011007804A1 PCT/JP2010/061899 JP2010061899W WO2011007804A1 WO 2011007804 A1 WO2011007804 A1 WO 2011007804A1 JP 2010061899 W JP2010061899 W JP 2010061899W WO 2011007804 A1 WO2011007804 A1 WO 2011007804A1
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- WIPO (PCT)
- Prior art keywords
- cam follower
- stud
- flange
- outer end
- bearing support
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
- F16H53/06—Cam-followers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
-
- 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
- F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
- F16C13/006—Guiding rollers, wheels or the like, formed by or on the outer element of a single bearing or bearing unit, e.g. two adjacent bearings, whose ratio of length to diameter is generally less than one
-
- 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
- F16C19/22—Bearings 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
- F16C19/44—Needle bearings
- F16C19/46—Needle bearings with one row or needles
- F16C19/463—Needle bearings with one row or needles consisting of needle rollers held in a cage, i.e. subunit without 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings 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
- F16C19/44—Needle bearings
- F16C19/46—Needle bearings with one row or needles
- F16C19/466—Needle bearings with one row or needles comprising needle rollers and an outer ring, i.e. subunit without inner ring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/008—Identification means, e.g. markings, RFID-tags; Data transfer means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49295—Push rod or rocker arm making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2101—Cams
- Y10T74/2107—Follower
Definitions
- the present invention relates to a cam follower and a method for manufacturing the cam follower.
- Cam followers are used in a wide variety of applications, including indexing device index mechanisms, machine tool cam mechanisms, and printing machine paper feed mechanisms.
- indexing device index mechanisms such as a conveyor part of a general goods lifting and conveyance apparatus, a conveyance guide of a press machine, a slide part of an automatic door, a fork contraction part, such as a forklift.
- a printing machine it is used for a movement mechanism of a paper pressing claw shaft of a paper feeding mechanism, an ink kneading roller, a cam mechanism unit, and the like.
- a cam follower is a cam follower stud (hereinafter simply referred to as a “stud”) that is rotatably fitted with a thick outer ring via a rolling element.
- a cam follower stud hereinafter simply referred to as a “stud”
- a conventional cam follower includes a stud 1 and a bearing assembly 2 that is rotatably assembled to one end of the stud 1.
- the stud 1 is provided with a bearing support portion 3 in which the bearing assembly 2 is rotatably fitted at one end portion, and an attachment shaft portion 4 at the other end portion.
- a flange portion 5 serving as an outer end regulating portion of the bearing assembly 2 is provided at an end portion of the bearing support portion 3 opposite to the mounting shaft portion 4, that is, an outer end portion.
- a side plate press-fitting portion 7 having a small diameter due to the step portion 6 is provided at an end of the bearing support portion 3 on the mounting shaft portion 4 side, that is, an inner end portion.
- the mounting shaft portion 4 having a slightly smaller diameter is provided from the side plate press-fit portion 7 in the axial direction, and a screw portion 8 is provided at the tip of the mounting shaft portion 4.
- An oil supply hole 10 is provided in the stud 1.
- the bearing assembly 2 includes a roller 9 held by a cage 11 with an outer diameter surface of the bearing support portion 3 as a raceway surface, and an outer ring 12 that is rotatably fitted via the roller 9. Is done.
- An annular inner plate 13 serving as an inner end regulating portion of the bearing assembly 2 is press-fitted and fixed to the side plate press-fitting portion 7.
- the inner plate 13 has the same outer diameter as the flange portion 5.
- An annular outer end recess 14 and inner end recess 15 are concentrically provided on both end faces of the outer ring 12.
- the flange 5 is inserted into the outer end recess 14 with a slight gap in the radial direction and the axial direction
- the inner plate 13 is inserted into the other inner end recess 15 with a slight gap in the radial direction and the axial direction.
- the flange portion 5 and the inner plate 13 regulate the movement of the bearing assembly 2 in the axial direction.
- the cam follower is fixed in a cantilever manner by inserting the mounting shaft portion 4 of the stud 1 into the housing of the mechanical device to be mounted and fastening the nut to the screw portion 8 protruding from the opposite surface of the housing.
- the rolling elements include a roller type with a cage and a full roller type that does not use a cage.
- the stud 1 is generally formed by cutting a metal bar to form the above-described portions. And before the cutting process, it is known that a hexagonal hole is formed on the outer end surface of the flange portion serving as one end surface, and a center hole is processed on the outer end surface of the mounting shaft portion serving as the other end surface by forging ( Patent Document 2).
- an oil supply structure for the raceway portion it is known to provide an axial oil supply hole 10 extending from the center of the outer end surface of the mounting shaft portion 4 of the stud 1 to the center of the raceway surface of the bearing support portion 3.
- a grease nipple is attached to the open end of the axial oil supply hole (see Patent Document 1 or 2).
- seal grooves 16 and 17 are provided in the concave portions 14 and 15, respectively, and an outer end lip seal 18 and an inner end lip seal 19 are mounted in the seal grooves 16 and 17, respectively.
- the lip portions 21 (see FIG. 28A) of the lip seals 18 and 19 are bent so as to be outward (directions away from the inside of the bearing assembly 2 in the axial direction), and the bent lips The portion 21 is brought into contact with the outer diameter surfaces of the flange portion 5 and the inner plate 13 to perform sealing.
- the corner portions of the outer diameter surfaces of the flange portion 5 and the inner plate 13 and the both end surfaces in the axial direction are formed with chamfer portions 22 to prevent the occurrence of chipping or the like in the corner portions. ing.
- Japanese Patent Laying-Open No. 2005-257036 (FIGS. 3, 4, and 9) Japanese Patent No. 3874479 (paragraph 0037) Japanese Patent Laid-Open No. 7-42809 (FIG. 2) JITTO No.2513158
- the stud 1 is formed with a flange portion 5, a bearing support portion 3, a side plate press-fit portion 7, and an attachment shaft portion 4 by cutting a metal rod obtained by cutting a metal wire into a predetermined length. Further, after primary processing such as threading of the screw portion 8 and drilling of the oil supply hole 10 is performed, heat treatment and grinding processing for the bearing support portion 3 are performed to complete.
- the metal structure of the metal bar is a fibrous structure in which many fibers are gathered, and the flow of the fibrous structure is called a fiber flow.
- a fibrous flow in the length direction that is, a fiber flow appears in the length direction.
- the stud 1 is formed by cutting a metal rod having a uniform fiber flow in the length direction from the outer peripheral surface, as shown by a thin line in the schematic diagram of FIG.
- the fiber flow a is cut.
- the portion of the flange 5 at one end portion of the stud 1 cut in this way is formed by sequentially cutting the fiber flow a from the outer periphery at the end surface on the bearing support portion 3 side. Therefore, since the collar part 5 is arranged so that the eyes of the fiber flow a cut toward the end face are aligned, the collar part 5 is easily broken along the eyes of the cut fiber flow a.
- the fiber flow a in the outer peripheral portion is cut by cutting, so that the outer peripheral portion of each portion is an eye of the fiber flow a. It is easy to break along.
- the present invention provides a cam follower that is compact and low in cost by obtaining a high-strength stud having a continuous fiber flow over each part without cutting the fiber flow by cutting.
- the lip portion 21 is bent as shown in FIG. 28A when the studs 1 and the bearing assembly 2 are combined in an accurate state where the shaft centers coincide with each other (when the deviation ⁇ is zero). ), The outer diameter surface of the flange portion 5 is smoothly fitted inside the lip portion 21 of the outer end lip seal 18 (see the alternate long and short dash line), and the lip portion 21 is bent outwardly in the initial state. It is in close contact with the outer diameter surface and is in a normal wearing state.
- the tip of the lip portion 21 hits the chamfered portion 22 and is pushed in as it is. As shown in FIG. 28 (b), the lip portion 21 is wrinkled, resulting in an incomplete mounting state where the lip portion 21 does not contact the outer diameter surface of the heel portion 5.
- the maximum amount of the deviation amount ⁇ is a radial gap in the bearing assembly 2 and is about 0.06 mm.
- M is a product number marking applied to the outer end surface of the flange portion 5 and is shown here for convenience of comparison with the embodiments described later.
- the present invention eliminates the problem of lip seal wobbling in the cam follower assembly process, and even if there is a certain amount of deviation between the stud and the bearing assembly, the lip seal does not wobble and It is a second problem to provide a cam follower that can perform secure sealing.
- a third object of the present invention is to reduce the cost of processing studs in cam followers and contribute to the cost reduction of products.
- both ends of the retainer 11, the flange portion 5 and the inner plate 13 It is an effective measure to interpose washers between them.
- the sealability is insufficient only with the washer, it is necessary to add a separate seal member.
- a washer is required in addition to the sealing member in the case of FIG. 27, and there is a problem that causes an increase in the number of parts and thus an increase in product cost.
- a fourth problem of the present invention is to combine the washer function without increasing the number of parts while maintaining the seal function with respect to the seal member in addition to the third problem.
- the present invention includes an outer ring having an outer raceway surface on an inner periphery, a bearing support portion facing the outer raceway surface, and adjacent to one side of the bearing support portion.
- the side plate press-fitting portion and the mounting shaft portion of the inner plate adjacent to each other in order on the other side of the flange portion and the bearing support portion are formed, and the fiber flow continues along the surface from the flange portion to the outer periphery to the bearing support portion.
- a stud formed between the outer raceway surface and the bearing support, and a shaft of the outer ring and the rolling element in cooperation with the flange that is press-fitted into the side plate press-fitting part.
- a cam follower is constituted by an inner plate that restricts movement in the direction.
- the bearing support portion, the side plate press-fitting portion, and the mounting shaft portion are sequentially formed to have a small diameter, and step portions are formed between the bearing support portion and the side plate press-fitting portion and between the side plate press-fitting portion and the mounting shaft portion, respectively.
- a corner is provided at the corner of the step formed between the bearing support portion and the side plate press-fitting portion.
- a hexagonal hole having a center hole at the bottom of the hole on the outer end surface of the flange portion and a center hole are formed on the outer end surface of the mounting shaft portion, respectively.
- the mounting shaft portion includes an axial oil supply hole extending from the tip surface of the attachment shaft portion to the bearing support portion, and a radial direction extending from the axial oil supply hole to the raceway surface of the bearing support portion.
- An oil supply hole is formed, and the axial oil supply hole is formed at a position eccentric to the non-load region of the cam follower.
- the mounting shaft portion includes an insertion shaft portion on the press-fitting side of the inner plate and a screw portion adjacent to the insertion shaft portion via a step portion in the axial direction, and a predetermined taper is provided to the step portion. Yes.
- lip seals are installed at both ends of the outer ring, one of the lip seals is in sliding contact with the outer peripheral surface of the flange, and the other is in sliding contact with the outer peripheral surface of the inner plate.
- the stud is set in a die having a cylindrical cavity that forms a metal bar having a fiber flow along the axial direction into a shape that forms the basis of the bearing support portion, the side plate press-fitting portion, and the mounting shaft portion.
- a cold forging step in which a metal bar is pressed with a punch in a longitudinal direction to form a primary molded product having a shape serving as a base of the flange, and the outer peripheral surface of the primary molded product is ground to form the flange,
- the bearing support portion, the side plate press-fitting portion, and a grinding process step for forming a part of the mounting shaft portion can be used.
- a projecting die for forming a nudity is provided at a portion of the die that forms the base of the flange portion on the bearing support portion side.
- a required taper mold is formed at the step portion between the insertion shaft portion of the die and the portion to be the screw portion.
- the punch is provided with a forming cavity for forming the flange, and the metal bar deformed by pressurization is poured into the forming cavity to form the shape of the flange.
- a hexagonal hole having a center hole in the hole bottom can be formed on the outer end surface of the flange portion, and a center hole can be formed on the outer end surface of the mounting shaft portion.
- a rolling step of forming a screw portion on the mounting shaft portion by rolling can be provided.
- a fiber flow is continuously formed along the surface from the flange portion to the outer periphery to the raceway surface of the bearing support portion.
- the cam follower stud according to the present invention can be made smaller in shape than a stud formed by conventional cutting as long as it has the same strength.
- a cam follower comprises a stud and a bearing assembly rotatably assembled to the stud, and the stud is provided at one end of the bearing assembly.
- a bearing support portion that is rotatably fitted, an attachment shaft portion is provided at the other end portion, and an outer end recess portion provided on the outer end surface of the outer ring of the bearing assembly and an inner end recess portion provided on the inner end surface.
- An outer end regulating portion and an inner end regulating portion provided at both axial ends of the bearing support portion are respectively fitted, and an outer end seal and an inner end seal are respectively provided between the concave portions and the outer end and inner end regulating portions.
- the outer end seal is formed by an outer end lip seal mounted in the outer end recess, and the lip portion of the outer end lip seal is bent outward in the axial direction. is there.
- the tip of the lip will contact the R-shaped part.
- the magnitude of the inclination angle of the tangent at the contact position depends on the shift amount. When the amount of deviation is below a certain level, the tangential inclination angle is smaller than the conventional chamfering inclination angle, so the friction acting on the lip portion is also reduced.
- a cam follower includes a stud and a bearing assembly rotatably assembled to the stud, and the stud is formed at one end of the stud.
- a bearing support portion in which the bearing assembly is rotatably fitted, an attachment shaft portion is provided at the other end portion, and the bearing assembly includes an outer end regulating portion provided at both axial end portions of the bearing support portion.
- the stud is subjected to cold forging or cutting, etc.
- the cam follower according to the present invention has a sliding property and elasticity as each seal member in the cam follower having the above-described configuration that solves the third problem.
- the washer / seal member has an annular portion covered on the inner surface facing the restricting portion, and a bent portion is formed on the outer peripheral edge of the annular portion.
- the stud used in the cam follower of the present invention has the fiber flow continuously formed along the surface from the flange portion to the bearing support portion, so that there is no strength reduction due to the fiber flow cutting.
- the strength of the stud is improved, and the width and diameter can be reduced by that amount, and the stud can be made compact.
- cam follower using the stud can be made compact as a whole as the stud becomes compact.
- the stress concentration in this portion is alleviated and the strength of the stud is improved.
- the effect on the tightening torque applied when attaching to the mating member via the threaded portion was particularly great, and the stress applied to this location could be reduced by up to about 50%. It was also confirmed that the stress applied when a bending moment is generated in the cam follower stud when using a normal cam follower is also reduced.
- heat treatment and grinding work are not required by using a stud that is in a state of a primary work product before being subjected to heat treatment and grinding usually applied after cold forging or cutting. Therefore, the processing cost can be reduced.
- the disadvantage of not performing heat treatment and grinding on the stud is eliminated by press-fitting and fixing the flanged inner ring subjected to these treatments to the bearing support portion of the stud.
- the fiber flow of the metal bar is not cut by forming the stud by cold forging, a material having higher strength than that formed by cutting can be obtained.
- FIG. 2A is a partially enlarged sectional view of FIG. 2
- FIG. 2B is a partially sectional view of another part of FIG. 2
- FIG. 3C is a front view showing a part of the modification of FIG. .
- a figure is explanatory drawing in the case of 2nd embodiment
- FIGS. 4A to 4D are partial cross-sectional views showing examples of the fourth embodiment. It is a front view of Fig.9 (a). It is sectional drawing which shows the other example of 4th embodiment.
- a figure is sectional drawing of the cam follower of 5th embodiment
- Figure is sectional drawing which shows a part of (a) figure. It is sectional drawing which shows a part of cam follower of 6th embodiment. It is sectional drawing which shows a part of cam follower of 7th embodiment. It is sectional drawing which shows a part of cam follower of 8th embodiment.
- sectional drawing which represented typically the fiber flow of the primary molded product of the stud formed by cold forging. It is a partially notched front view of the primary molded product of the stud formed by cold forging. It is sectional drawing which shows the state which opened the punch of the metal mold
- the cam follower according to the first embodiment shown in FIG. 1 includes an outer ring 43 having an outer raceway surface 43a on the inner periphery, and a bearing support portion 34 having an inner raceway surface 34a facing the outer raceway surface 43a.
- a flange portion 33 adjacent to one side of the support portion 34 and a side plate press-fit portion 36 and a mounting shaft portion 38 adjacent to each other on the other side of the bearing support portion 34 are formed in order, and the flange portion 33 extends from the flange portion 33 to the bearing support portion 34.
- the stud 31 in which the fiber flow is continuously formed along the surface, the rolling elements 44 arranged between the outer raceway surface 43a and the bearing support portion 34, and the side plate press-fit portion 36 are press-fitted.
- the outer ring 43 and an inner plate 53 that restricts the axial movement of the rolling elements 44 are provided.
- a nusumi 62 is formed that is recessed in the flange portion 33 side (axial direction) at the corner portion on the bearing support portion 34 side (FIG. 3A). )reference).
- the susceptor in this part is recessed in the radial direction (see the snu 20 in FIG. 29), but in the case of this invention, it is processed by cold forging as described later. Therefore, it is necessary to be recessed in the die cutting direction (axial direction) during cold forging.
- the Nusumi 62 is provided in order to avoid a problem that the roller 44a (see FIG. 3A) contacts the corner portion of the step portion 61 when the rolling element 32 is a full roller type.
- the bearing support portion 34, the side plate press-fit portion 36, and the mounting shaft portion 38 are sequentially formed to have a small diameter.
- a stepped portion 37 is formed in each.
- the corner 63 of the step 35 formed between the bearing support portion 34 and the side plate press-fit portion 36 is provided with a round (R) as shown in FIG. To prevent damage.
- a hexagonal hole 42 having a center hole 42a at the bottom of the hole is formed on the outer end surface of the flange 33.
- a center hole 64 is formed on the outer end surface of the mounting shaft portion 38.
- the mounting shaft portion 38 includes an insertion shaft portion 38a on the press-fitting side, and a screw portion 38b adjacent to the insertion shaft portion 38a in the axial direction via a step portion 38c, and the step portion 38c has a required taper. Has been granted.
- Lip seals 46, 47 are installed at both ends of the outer ring 43, one lip seal 46 is in sliding contact with the outer peripheral surface of the flange 33, and the other lip seal 47 is in sliding contact with the outer peripheral surface of the inner plate 53. ing.
- the lip seals 46, 47 are concentric with the outer raceway surface 43 a formed on the inner peripheral surface of the outer ring 43, and are mounted in the outer ring radial seal grooves 51, 52 therefrom.
- the flange 33 and the inner plate 53 prevent the outer ring 43 and the rolling element 44 from moving in the axial direction, and the lip seals 46 and 47 prevent leakage of the internal lubricating oil and prevent dust from entering from the outside. is doing.
- the oil supply hole 41 provided in the stud 31 has an axial oil supply hole 41a that reaches the center portion of the bearing support portion 34 from the outer end surface on the screw portion 38b side, and a diameter that reaches the raceway surface 34a in communication with the tip portion. And the inlet of the axial oil supply hole 41a serves as an oil supply port 65. A grease nipple is attached to the oil supply port 65 in use.
- a constant load direction (see the white arrow in FIG. 1) is defined on the outer ring 43 of the cam follower.
- the stud 31 can be divided into a load region ⁇ and a non-load region ⁇ with reference to the center line thereof.
- the axial oil supply hole 41a has a constant distance r from the center line in the direction of the non-load region ⁇ . It is provided only at an eccentric position. Thereby, the strength in the load region ⁇ of the stud 31 is improved.
- roller 44 as a rolling element is held by a cage 45, but a full roller type that does not use the cage 45 may be used.
- the roller in this case is indicated by reference numeral 44a in FIG.
- the screw portion 38b may be omitted and only the insertion shaft portion 38a may be used.
- the chamfer 38d serves as a guide when the insertion shaft 38a is inserted into the mounting hole of the counterpart machine. It is fixed by press-fitting the insertion shaft portion 38a into the mounting hole.
- a slot for engaging a flathead screwdriver may be formed instead of the hexagonal hole 42.
- the lip seals 46 and 47 may be omitted. In that case, the recessed steps 51 and 52 are omitted.
- the oil supply hole 41 (the oil supply port 65, the axial oil supply hole 41a, and the radial oil supply hole 41b) may be omitted.
- the cam follower of the second embodiment shown in FIG. 4 includes a stud 31 and a bearing assembly 32 that is rotatably assembled to the stud 31 as in the conventional case.
- the stud 31 is provided with a flange portion 33 serving as an outer end restricting portion at one end portion thereof, and the side plate press-fitting portion 36 and a minute step portion are sequentially provided in an axial direction from the flange portion 33 via the bearing support portion 34 and the step portion 35.
- An attachment shaft portion 38 is provided via 37.
- the attachment shaft portion 38 includes an insertion shaft portion 38a and a screw portion 38b at the tip.
- the outer diameter surface of the bearing support portion 34 is ground to form a raceway surface 34a.
- An oil supply hole 41 is provided at the center of the end face of the screw part 39.
- a hexagonal hole 42 is provided at the center of the end face on the flange 33 side.
- the stud 31 is manufactured by cold forging or cutting.
- the bearing assembly 32 is mounted on the outer ring 43, the rollers 44 interposed between the outer ring 43 and the raceway surface of the bearing support 34, the cage 45 for guiding each roller 44, and the outer end surface of the outer ring 43.
- the outer end lip seal 46 and the inner end lip seal 47 attached to the inner end surface are formed.
- an annular outer end stepped portion 48 and a similar inner end stepped portion 49 are provided coaxially on the inner end portion, and seal grooves 51, 52 provided in the stepped portions 48, 49, respectively.
- the outer end lip seal 46 and the inner end lip seal 47 are attached to the above.
- the flange 33 is fitted into the outer end stepped portion 48 of the outer ring 43.
- the inner end stepped portion 49 is fitted with an annular inner plate 53 that is press-fitted and fixed to the side plate press-fitting portion 36 and serves as an inner regulating portion.
- the inner plate 53 has the same diameter as the flange portion 33, and the movement of the bearing assembly 32 in the axial direction is restricted by both of them.
- the corner portions on both sides of the outer diameter surface of the flange portion 33 and the inner plate 53 are rounded. That is, as shown in FIG. 5, in the flange portion 33, the inner corner portion formed by the inner side surface (the surface on the bearing assembly 32 side) and the outer diameter surface has a constant radius of curvature and a central angle of 90 degrees.
- the inner R-shaped portion 54 is formed (see FIG. 7A).
- An outer R-shaped portion 55 having the same radius of curvature and the same center angle is also formed in the outer corner portion formed by the opposite outer surface and outer diameter surface.
- an inner corner portion formed by the inner side surface (the surface on the bearing assembly 32 side) of the inner plate 53 and the outer diameter surface, and an outer corner portion formed by the outer side surface and the outer diameter surface on the opposite side are respectively similar inner Rs.
- a shape portion 56 and an outer R-shape portion 57 are formed.
- the inner R-shaped portion 54 of the flange 33 and the inner R-shaped portion 56 of the inner plate 53 are fitted into the outer end stepped portion 48 and the inner end stepped portion 49, respectively.
- the lip portions 58 and 59 of the outer end lip seal 46 and the inner end lip seal 47 are brought into contact with the outer diameter surfaces of the fitted flange portion 33 and the inner plate 53, respectively.
- Each of the lip portions 58 and 59 is bent outward in a free state, and the inner diameter surface of the bent portion comes into contact with the other outer diameter surface to perform a sealing action.
- the cam follower of the second embodiment is as described above.
- the insertion shaft portion 38a of the mounting shaft portion 38 is inserted into the mounting portion on the device side, and the screw portion 38b is screwed.
- the bearing assembly 32 is supported in a cantilevered manner, and the outer ring 43 is brought into contact with the raceway and rotated.
- the lip portion 58 is formed on the inner R-shaped portion 54. Contact.
- the lip portion 58 was easily bent due to the fact that the corner portion was a chamfered portion. Drowning is unlikely to occur for the reasons described.
- FIG. 7A shows an embodiment in which an inner R-shaped portion 54 is formed at the inner corner portion of the flange portion 33.
- the central angle of the inner R shape 54 is 90 degrees, and the radius of curvature is a.
- the tip of the lip portion 58 is in contact with the position of the shift amount ⁇ .
- the central angle of the arc portion from the contact position of the lip portion 58 to the outer diameter surface is defined as ⁇ .
- the inclination angle of the tangent line A drawn to the contact position is geometrically ⁇ .
- FIG. 7B shows a conventional case in which the chamfered portion 22 is formed in the same portion.
- the inclination angle of the chamfered portion 22 is ⁇ , and the axial length of the chamfered portion 22 is a that is the same as the radius of curvature. If the inclination angle ⁇ is too small, the width of the outer diameter surface of the flange portion 33 that contacts and seals the lip portion 58 decreases, so ⁇ is set to 30 degrees or more. The tip of the lip portion 58 is in contact with the position of the shift amount ⁇ as in the case described above.
- the central angle ⁇ is determined by the magnitude of the deviation amount ⁇ .
- the deviation amount ⁇ is the maximum radial gap of the bearing assembly 32, and the gap is usually as small as about 0.06 mm. Is very small.
- the inclination angle ⁇ (30 degrees or more) is constant regardless of the amount of deviation ⁇ , and thus the above relationship ⁇ ⁇ is established. Therefore, it can be understood that the friction is smaller in the case of the present embodiment having the R shape than in the case of the chamfered shape, and accordingly, the curling is less likely to occur.
- the R-shaped portion 54 is formed without causing the lip portion 58 to bend even if there is a deviation amount ⁇ of the maximum radial clearance.
- the contact surface (the outer diameter surface of the flange portion 33) can be smoothly fitted over the surface.
- the inner plate 53 is press-fitted into the side plate press-fit portion 36, and the inner plate 53 is fitted into the inner end stepped portion 49.
- the lip portion 59 of the inner end lip seal 47 also comes into contact with the inner R-shaped portion 56 in the same manner as in the above case, even if there is a certain amount of deviation ⁇ as in the case described above. It is installed in a regular state without.
- the marking M (refer to FIG. 27) of the product number conventionally applied to the outer surface of the collar portion 33 is applied to the outer surface (surface) of the inner plate 53 (see FIG. 4, see FIG.
- the directionality of the inner side plate 53 can be displayed together with the display of the product number, the number of markings can be reduced and the marking work can be shortened.
- the stud 31 when the stud 31 is manufactured by forging, it is conventionally difficult to make the chamfered portion 22 (see FIG. 7B) only by forging, and therefore a process of forming the chamfered portion 22 by cutting after forging is necessary.
- the R shape can be formed by forging, so that a subsequent cutting step is not necessary.
- the inner plate 53 can also be formed into an R shape by performing a heat treatment after the punching and then barrel-polishing a sag or fractured surface generated during the punching. Therefore, a cutting process is unnecessary also in this case.
- both the inner and outer corner portions of both the flange portion 33 and the inner plate 53 have an R shape, but only the inner corner portion, that is, only the inner R shape portions 54 and 56 are provided.
- the shape may be an R shape, and the other outer corner portion may be chamfered.
- the cam follower of the third embodiment shown in FIG. 8 has basically the same configuration as that of the second embodiment, but there is a difference with respect to the lip seal. That is, in the case of the second embodiment, as shown in FIG. 4, the outer end lip seal 46 is mounted between the outer end surface of the outer ring 43 and the flange 33, and the inner end surface of the outer ring 43 is An inner end lip seal 47 was mounted between the inner plates 53.
- the inner end lip seal 47 is omitted in order to reduce the number of parts, and only the outer end lip seal 46 is attached as the lip seal.
- the outer end lip seal 46 is omitted. It is not possible.
- the gap between the inner diameter surface of the inner end stepped portion 49 of the outer ring 43 and the outer diameter surface of the inner plate 53 is a minute gap (0.1-0) necessary for rotation. .2 mm) can be set narrowly.
- the minute gap serves as a labyrinth seal 60 and can prevent foreign intrusion and internal grease leakage to some extent.
- a device side mounting portion 70 for screwing one end portion of the stud 31 is necessarily close to the inner end surface of the outer ring 43.
- the device-side mounting portion 70 is in close contact with the inner plate 53 and thus is close to the labyrinth seal 60.
- the gap between the outer peripheral surface of the outer ring 43 and the device-side mounting portion 70 also has a labyrinth seal function, and prevents intrusion of dust and leakage of grease.
- the grease leaks from both the lip seals 46 and 47 when the internal pressure of the bearing assembly 32 becomes higher than a certain level.
- the labyrinth seal 60 is formed instead of the inner end lip seal 47 as in this embodiment, the grease leaks through the labyrinth seal 60 before the internal pressure becomes higher than a certain level. Leakage from the lip seal 46 can be reliably prevented.
- the corner portion of the flange portion 33 and the inner side plate 53 has an R shape.
- the corner portion is not necessarily R. It is not necessary to use a shape, and these corner portions may have a chamfered structure.
- the fourth embodiment shown in FIGS. 9 to 11 relates to the improvement of the stud 31.
- the studs 31 of the second and third embodiments described above are integrally provided with the flange 33 at one end thereof. For this reason, when the stud 31 is manufactured by cutting, the outer diameter of the metal rod as a raw material is determined by the outer diameter of the flange portion 33, so that most of the material is discarded by cutting. For this reason, it has become a factor that material cost and processing cost become high.
- the outer plate 63 can be fixed to the stud 31 without increasing the number of parts.
- the one shown in FIGS. 9A to 9C is provided with a side plate attachment portion 83 having a small diameter due to the stepped portion 64 on the tip surface of the bearing support portion 34 of the stud 31.
- the outer plate 63 is annular, and has the same outer diameter and thickness as the flange 33 (see FIG. 4).
- the outer diameter of the side plate attachment portion 83 is formed to be the same as the outer diameter of the side plate press-fitting portion 36 (see FIG. 4), the outer plate 63 and the inner plate 53 can be shared by parts of the same size.
- FIGS. 9A to 9C In order to fix the outer plate 63 to the side plate mounting portion 83, in any of the cases shown in FIGS. 9A to 9C, a structure in which caulking 67 is applied to a plurality of peripheral portions or the entire periphery of the side plate mounting portion 83 is provided. I'm taking it.
- FIG. 10 shows a case where caulking 67 is applied to three places.
- the cam follower according to the fifth embodiment shown in FIGS. 12A and 12B includes a stud 31 and a bearing assembly 32 rotatably assembled to the stud 31 as in the conventional case.
- the stud 31 is provided with a bearing support portion 34 in which the bearing assembly 32 is rotatably fitted at one end thereof, and a mounting shaft portion 38 at the other end thereof.
- the attachment shaft portion 38 includes an insertion shaft portion 38a and a screw portion 38b at the tip.
- a flange 33 serving as an inner end regulating portion is integrally provided at a boundary portion between the bearing support portion 34 and the mounting shaft portion 38, that is, an inner end portion of the bearing support portion 34.
- An oil supply hole 41 bent in an L shape at the tip is provided from the end surface on the screw portion 38b side to the center of the stud 31, and an L-shaped bent portion at the tip is provided around the outer peripheral surface. 41b communicates.
- a hexagonal hole 42 is provided at the center of the end surface on the bearing support portion 34 side.
- the stud 31 is made by cold forging a steel metal rod with a die and a punch having a molding surface corresponding to the outer shape of the stud 31, and then processing the oil supply hole 41. It is formed.
- the hexagonal hole 42 can be processed at the same time during cold forging.
- the fiber flow of the metal rod of the material is formed in a continuous state without being cut, so that a material having higher strength than that obtained by cutting is obtained.
- the entire stud 1 (see FIG. 27) is subjected to heat treatment, and the bearing support 3 is finished smoothly. Finishing such as grinding was performed.
- the stud 31 of the present invention is in a state of a primary processed product before being subjected to heat treatment and finishing without being subjected to heat treatment and finishing.
- the bearing assembly 32 includes an inner ring 71 and an outer ring 32, rollers 44 interposed between the raceways 71a and 72a facing each other (see FIG. 12 (a)) at a constant interval in the circumferential direction, A cage 45 for guiding each roller 44 and a washer / seal member 73 attached to both ends of the outer ring 43 are configured.
- the inner ring 71 is integrally provided with an inner ring collar portion 74 as an outer end restricting portion at an outer end portion thereof.
- the bearing assembly 32 is attached to the stud 31 by press-fitting the inner ring 71 into the bearing support portion 34. In order to prevent the bearing assembly 32 from coming off, caulking is applied to the inner periphery of the inner ring collar portion 74 at the end face of the stud 31.
- Reference numeral 75 indicates the crimped portion.
- a hole 76 is provided in the inner ring 71, and the hole 76 matches the oil supply hole 41b. For this reason, when the inner ring 71 is press-fitted into the bearing support portion 34, the circumferential direction is not limited. When the hole 76 matches the oil supply hole 41 b, the interior of the bearing assembly 32 is communicated with the oil supply hole 41.
- Step portions 48 and 49 from the outer ring width surface are provided on both end surfaces of the outer ring 43 on the raceway surface 72a side, and the washer / seal member 73 is mounted on the step portions 48 and 49, respectively.
- a material of each washer and seal member 73 a material excellent in wear resistance, slipperiness, and sealability, for example, engineering plastics such as PEEK, POM, and PA can be used. Other than this, there is no particular limitation on the material as long as a predetermined function can be achieved.
- the inner ring 71 and the outer ring 43 are made of ordinary steel, heat-treated, and the raceway surfaces 71a and 72a are ground.
- the washer and seal member 73 has a shape having a bent portion 73 b provided in an inverted L shape on the outer peripheral edge of the annular portion 73 a, and the bent portion 73 b is a step of the outer ring 43. It is pressed against the inner diameter surface of the portion 49.
- the annular portion 73a has a width that covers the inner surfaces of the flange portion 33 and the inner ring flange portion 74, and is sandwiched in the axial direction between the flange portions 33, 74 and the radial end surfaces of the stepped portions 48, 49. Worn. Sealing between the outer ring 43 and the flange portions 33 and 74 is performed by the annular portion 73a. At the same time, it acts as a washer that reduces friction between both ends of the retainer 45 and the inner surfaces of the flanges 33 and 74, thereby contributing to smooth rotation of the outer ring 43.
- the cam follower of the fifth embodiment is as described above.
- the screw portion 38b is fixed to a part of the mechanical device to support the portion of the bearing assembly 32 in a cantilever manner.
- the outer ring 43 of the bearing assembly 32 is brought into contact with the track and rotated.
- the roller 44 rolls on the raceway surface 71a of the inner ring 71 and the raceway surface 72a of the outer ring 43. Since these raceway surfaces 71a and 72a are heat-treated, they have sufficient durability.
- annular portion 73 a of the washer / seal member 73 is interposed between the flange portions 33 and 74 facing the stepped portions 48 and 49.
- the outer ring 43 rotates smoothly and a sealing action is performed at the same time.
- the inner surfaces of both flange portions 33 and 74 facing both ends of the retainer 45 are covered with the annular portion 73a of the washer / seal member 73, even if the end portions of the retainer 45 come into contact with each other Can be rotated. Moreover, there is no fear of scratching the flange 33 that has not been heat-treated.
- the sixth embodiment shown in FIG. 13 is different from the above case in the structure of the inner ring 71. That is, the inner ring 71 in this case is a cylindrical body, and a separate annular outer plate 77 forming an outer end restricting portion is press-fitted into the outer diameter surface of the tip end portion of the stud 31 and is caulked along the inner peripheral portion thereof. A portion 75 is provided. The outer plate 77 is formed to have the same diameter as that of the flange portion 33, and similarly to the inner ring flange portion 74 (see FIG. 12A), a required gap is provided in the step portions 48 and 49 on the outer end side of the outer ring 43. Inserted. A washer and seal member 73 is mounted on the inner surface.
- the stud 31 is straightened and can be easily formed by cold forging in terms of shape, which can contribute to further reduction in product cost.
- the roller 44 is a full-roller type in the configuration of the seventh embodiment (see FIG. 14).
- the retainer 45 since the retainer 45 is not used, the end of the roller 44 may come into contact with the inner surfaces of the outer plate 77 and the inner plate 53, and so-called galling may occur.
- the outer peripheral portion of both end faces of the cylindrical inner ring 71 is formed in an R shape, so that the sloping portion 81 is formed between the outer plate 77 and the inner plate 53.
- the drooping portion 81 can be formed by a simple process of making the outer peripheral portions of both end faces of the inner ring 31 into an R shape. Due to the presence of the drooping portion 81, voids are generated in the respective corners between the inner ring 71 and the outer plate 77 and the inner plate 53, so that the roller end portion is prevented from being worn.
- the stud 31 used for the cam follower according to the present invention can be manufactured by the following steps.
- the primary molded product 31a of the stud shown in FIGS. 16 and 17 is formed by cold forging.
- the primary molded product 31a has a shape having no stepped portion 37 between the side plate press-fitting portion 36 of the stud 31 and the mounting shaft portion 38, and the stepped portion 37 is formed by a grinding process to be described later.
- a cylindrical cavity for forming the metal rod A in which the fiber flow is formed along the axial direction into a shape that is the basis of the bearing support portion 34, the side plate press-fit portion 36, and the mounting shaft portion 38 is formed.
- This is a step of setting the die 100 having the die and pressurizing it with the punch 102 in the longitudinal direction of the metal rod A to form a primary molded product 31a having a shape to be the basis of the flange 33.
- the fiber flow a is a schematic diagram of FIG. As shown in FIG. 5, the fiber flow a becomes dense at the step portions 61 and 35, and the fiber flow a continues along the surface from the flange portion 33 to the bearing support portion 34 in which the inner raceway surface 34a is formed on the outer periphery. Formed.
- the mold includes a die 100 including a bearing support portion 34 of the stud 31 and a cylindrical molding cavity 101 of the mounting shaft portion 38, and a molding cavity 103 of the flange portion 33 on the lower surface. And punch 102.
- a knockout pin 104 for pushing out the molded product from the die 100 is provided.
- a conical protrusion 109 that forms a center hole is provided on the upper surface of the knockout pin 104.
- a guide hole 106 of a hexagonal hole forming punch 105 that forms a hexagonal hole 42 of the flange 33 is provided at the center of the punch 102.
- a projecting die 107 is provided on the periphery of the opening of the molding cavity 101 of the die 100 to form a nose 62 at the base of the flange 33.
- a taper 108 for forming a tapered step portion 38c is provided in a portion of the cavity 101 for forming the die 100 where the mounting shaft portion 38 is to be formed, between the mounting shaft portion 38 and the screw portion 38b. It has been.
- the fiber flow is axially performed with the punch 102 opened upward with respect to the die 100.
- a continuous metal bar A is set on the die 100.
- the punch 102 is moved down so that the metal bar A conforms to the shape of the molding cavity 101 in the die 100 and the molding cavity 103 of the punch 102 as shown in FIGS.
- the material A is plastically deformed.
- the hexagonal hole forming punch 105 of the punch 102 is press-fitted into the flange 33, and the hexagonal hole 42 having a center hole at the bottom is formed in the flange 33.
- the hexagonal hole forming punch 105 is opened upward, and the knockout pin 104 of the die 100 is pushed up to perform primary molding. The product 31a is removed from the die 100.
- the metal bar A can be, for example, case-hardened steel, but is not limited to this, and is not particularly specified as long as it does not impair the effects of the present invention.
- the molding cavity 103 for the flange portion 33 is provided on the lower surface of the punch 102.
- a molding cavity for molding the flange portion 33 is formed on the die 100 side.
- a metal bar set on a die with a flat pressing surface may be press-formed.
- FIG. 16 is a drawing showing the fiber flow a appearing on the surface of the cross-sectional structure along the axial direction of the primary molded product 31a.
- the whole appears almost parallel and at the same density. This indicates that the influence of plastic deformation due to forging is small on the meat portion around the shaft core.
- the flow of the fiber flow a is changed and has a high density. It shows that plastic deformation due to forging has a strong influence on the portion close to the surface.
- the high-density fiber flow a flows in the outer diameter direction along the outer surface of the flange portion 33 from around the hexagonal hole 42 in the center portion.
- the bent portion 33 is bent and folded in an inverted U shape without interruption from the tip of the flange portion 33.
- the flow of the center part of the thickness direction of the collar part 33 is relatively low density, it curves and bend
- the high-density fiber flow a in the portion close to the outer surface of the flange portion 33 is curved in a state of being deformed at a higher density along the recessed shape in the portion of the Nusumi 62, and goes toward the bearing support portion 34 without interruption. It is flowing while spreading.
- the fiber flow a of the flange portion 33 is bent in an inverted U shape without interruption, and the tip of the metal bar is pressed in the axial direction so that metal is formed in the forming cavity 103 of the punch 102. This is presumably due to the fact that the flesh of the metal flows in the radially outward direction and is molded.
- the reason why the fiber flow a is higher in the portion of the numi 62 is that the molded portion is further compressed by being hit by the projecting die 107 of the die 100.
- the stepped portion 35 is also curved along the radius of the corner portion 63 and flows toward the mounting shaft portion 38 with a slightly higher density. Further, the tapered stepped portion 38c is gently inclined along this and flows toward the unprocessed portion 39.
- the flow of the metal meat extending in the front end direction is formed by the conical protrusion 109 that forms the center hole 64 at the bottom portion, and the fiber flow a and the center of the outer peripheral portion are formed. It is thought that the part of the fiber flow a is substantially U-shaped.
- the tip end side of the mounting shaft portion 38 is formed with a small diameter through a tapered step portion 38c by the taper 108 of the die 100. As shown in FIG. 24, a threaded portion 38b is formed by rolling the small diameter portion.
- the places where grinding is performed in this grinding process include the outer peripheral surface of the flange portion 33, the step portion 35 on the raceway portion 34 a side of the flange portion 33, the track portion 34 a of the bearing support portion 34, the step portion 35, A side plate press-fit portion 36, a stepped portion 37, a corner radius (R size: R0.1 to 0.3 mm) between the side plate press-fit portion 36 and the stepped portion 37, an insertion shaft portion 38a of the mounting shaft portion 38, and a cylindrical grindstone
- the peripheral surface 110 has a shape corresponding to this grinding location.
- the surrounding grinding surface is inclined at a predetermined angle with respect to the grindstone shaft 110a, and as shown by white arrows in FIG. 25 and FIG.
- grinding in the shaft, diameter, and both directions can be performed in one step.
- reference numeral 111 denotes a turning unit of the cylindrical grindstone 110, and 112 denotes a turning axis. Moreover, in FIG. 25, FIG. 26, the code
- the width of the side plate press-fit portion 36 formed in the grinding step is slightly smaller than the width of the flange portion 33, and the insertion shaft portion 38a is formed to be equal to the thickness of the housing of the device to be attached. .
- the step portion 35 of the side plate press-fitting portion 36 is a minute one corresponding to the press-fitting allowance of the inner plate 53 (see FIG. 1) press-fitted here.
- the taper is applied to the stepped portion 38c in order to relieve stress and to prevent a problem of being caught in the mounting hole when the mounting shaft portion 38 is inserted into the mounting hole of the machine, thereby enabling smooth insertion. It is for doing so.
- a hexagonal hole 42 is provided at the center of the end surface of the flange 33, and a shallow center hole 42a is provided at the center of the tip surface of the mounting shaft 38.
- the hexagonal hole 42 is a hole into which a hexagonal wrench is inserted in order to prevent co-rotation when a nut is tightened on the screw portion 38b.
- a center hole 42a is formed at the bottom of the hexagonal hole 42, and is rotatably supported by the angular cylindrical grinding machine by the support shaft 113 with the other center hole 42a during grinding, as shown in FIGS. .
- a groove for inserting a flathead screwdriver may be provided instead of the hexagonal hole 42. In this case, the center hole 42a is provided in the groove.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
図1に示した第一実施形態のカムフォロアは、内周に外側軌道面43aを有する外輪43と、前記外側軌道面43aに対向する内側軌道面34aを有する軸受支持部34とを備え、前記軸受支持部34の一方の側に隣接する鍔部33と前記軸受支持部34の他方の側に順に隣接する側板圧入部36及び取付軸部38が形成され、前記鍔部33から軸受支持部34にかけ、表面に沿ってファイバーフローが連続して形成されているスタッド31と、前記外側軌道面43aと前記軸受支持部34の間に配列された転動体44と、前記側板圧入部36に圧入され前記鍔部33と協働で前記外輪43と前記転動体44の軸方向の移動を制限する内側板53とを備えている。
図4に示した第二実施形態のカムフォロアは、従来の場合と同様に、スタッド31と、そのスタッド31に回転自在に組み付けられた軸受組立体32とからなる。
図8に示した第三実施形態のカムフォロアは、基本的には前記第二実施形態の場合と同じ構成であるが、リップシールに関して相違がある。即ち、前記第二実施形態の場合は、図4に示したように、外輪43の外端面と鍔部33との間には外端リップシール46が装着され、また、外輪43の内端面と内側板53の間には内端リップシール47が装着されていた。
図9から図11に示した第四実施形態は、スタッド31の改良に関するものである。前述の第二及び第三実施形態のスタッド31は、その一端部に鍔部33が一体に設けられていた。このため、スタッド31を切削加工により製作する場合は、素材となる金属棒材の外径が鍔部33の外径によって決定されるで、切削によって材料の多くを捨てることとなる。このため、材料コスト及び加工コストが高くなる要因となっていた。
前記の外側板63をカシメ67によってスタッド31と固定した場合の耐久性を調べるために、以下の耐久試験を行った。その結果を次に示す。
※ 誘起スラスト力は通常ラジアル荷重の約5%とされるが、今回、耐スラスト力を調査するため、ラジアル荷重の10%相当のスラスト力を外側板63に負荷した。
ここに、Cは基本定格荷重、Pは動等価荷重であり、P/Cは軸受の負荷荷重を示す。
図12(a)(b)に示した第五実施形態のカムフォロアは、従来の場合と同様に、スタッド31と、そのスタッド31に回転自在に組み付けられた軸受組立体32とからなる。
次に、図13に示した第六実施形態は、内輪71の構造において前記の場合と相違している。即ち、この場合の内輪71は円筒体であり、外端規制部を形成する別体の環状の外側板77をスタッド31の先端部外径面に圧入し、かつその内周部に沿ってカシメ部75を設けたものである。外側板77は、鍔部33と同一径に形成され、前記の内輪鍔部74(図12(a)参照)と同様に、外輪43の外端側の段差部48、49に所要の隙間をおいて嵌入される。また、その内面にワッシャ兼シール部材73が装着される。
図14に示した第七実施形態は、前記第六実施形態(図13参照)の鍔部33を省略し、その代わりにスタッド31とは別部材の独立した環状の内側板53を軸受支持部34の内端部の段差部78に当たるまで圧入し、更に、軸受組立体32の内輪71及び外側板77をそれぞれ圧入したものである。
図15に示した変形例は、前記第七実施形態(図14参照)の構成において、ころ44を総ころタイプとしたものである。この場合は保持器45が使用されないので、ころ44の端部が外側板77及び内側板53の内面に接触して、いわゆるカジリを生じることがある。
この発明に係るカムフォロアに使用するスタッド31は、以下の工程によって製造することができる。
まず、図16及び図17に示すスタッドの一次成形品31aを冷間鍛造によって成形する。一次成形品31aは、スタッド31の側板圧入部36と取付軸部38の間に段差部37がない形状のものであり、段差部37は後述する研削工程により形成される。
このようにして、スタッド31の一次成形品31aを冷間鍛造により成形した後、図23に示すように、六角穴形成パンチ105を上方に開き、ダイス100のノックアウトピン104を押し上げて、一次成形品31aをダイス100から取り出す。
前記のようにして成形された一次成形品31aは、ダイス100のテーパ108によって取付軸部38の先端側が、テーパ状の段差部38cを介して小径に形成されている。この小径の部分を転造によって、図24に示すように、ネジ部38bを形成する。
次に、図24に示すように、ネジ部38bを形成した一次成形品31aを、防浸炭処理、高周波焼入れ等の熱処理を適宜施した後、図25、図26に示すような、アンギュラ円筒研削機を使用して、側板圧入部36の段差部37を形成して、図2に示すような、スタッド11を完成させる。
2 軸受組立体
3 軸受支持部
4 取付軸部
5 鍔部
6 段差部
7 側板圧入部
8 ネジ部
9 ころ
10 給油穴
11 保持器
12 外輪
13 内側板
14 外端凹部
15 内端凹部
16、17 シール溝
18、19 リップシール
20 ヌスミ
21 リップ部
22 面取り部
31 スタッド
32 軸受組立体
33 鍔部
34 軸受支持部
35 段差部
36 側板圧入部
37 段差部
38 取付軸部
38a 挿通軸部
38b ネジ部
38c 段差部
41 給油穴
41a、41b 給油穴
42 六角穴
43 外輪
44、44a ころ
45 保持器
46 外端リップシール
47 内端リップシール
48 段差部
49 段差部
51、52 シール溝
53 内側板
54 内側R形状部
55 外側R形状部
56 内側R形状部
57 外側R形状部
58、59 リップ部
60 ラビリンスシール
61 段差部
62 ヌスミ
63 外側板
64 センター穴
65 給油ポート
67 カシメ
69 ネジ
70 機器側取付部
71 内輪
71a、72a 軌道面
73 ワッシャ兼シール部材
73a 環状部
73b 屈曲部
74 内輪鍔部
75 カシメ部
76 孔
77 外側板
79 シール部材
80 シール溝
81 だれ部
83 側板取付部
100 ダイス
101 成形用キャビティ
102 パンチ
103 成形用キャビティ
104 ノックアウトピン
105 六角穴形成パンチ
106 ガイド孔
107 突状型
108 テーパ
109 突部
110 円筒砥石
110a 砥石軸
111 旋回ユニット
112 旋回軸
113 支持軸
Claims (28)
- 内周に外側軌道面を有する外輪と、前記外側軌道面に対向する内側軌道面を有し、前記内側軌道面の一方の側に隣接する鍔部と前記内側軌道面の他方の側に順に隣接する側板圧入部及び取付軸部が形成され、前記鍔部から外周に前記内側軌道面が形成された軸受支持部にかけて表面に沿ってファイバーフローが連続して形成されているカムフォロアスタッドと、
前記外側軌道面と前記内側軌道面の間に配列された転動体と、前記側板圧入部に圧入され、前記鍔部と協働で前記外輪と前記転動体の軸方向の移動を制限する側板と、を備えるカムフォロア。 - 前記鍔部の付け根部分に、鍔部に凹入するヌスミが形成されていることを特徴とする請求項1に記載のカムフォロア。
- 前記軸受支持部と側板圧入部との間に形成される段差部のコーナに、アールが付与されたことを特徴とする請求項1又は2に記載のカムフォロア。
- 前記鍔部の外端面に穴底にセンター穴を有する六角穴及び前記取付軸部の外端面にセンター穴がそれぞれ形成されていることを特徴とする請求項1から3のいずれかに記載のカムフォロア。
- 前記取付軸部の先端面から前記軸受支持部に至る軸方向の給油穴と、その軸方向の給油穴に連続し、かつ前記軸受支持部の軌道面に至る径方向の給油穴とが形成され、前記軸方向の給油穴がカムフォロアの非負荷域へ偏心した位置に形成されていることを特徴とする請求1から4のいずれかに記載のカムフォロア。
- 前記取付軸部が、前記側板圧入側の挿通軸部と、その挿通軸部に段差部を介して軸方向に隣接したネジ部とからなり、前記段差部に所要のテーパが付与されたことを特徴とする請求1から5のいずれかに記載のカムフォロア。
- 前記外輪の両端にシール部材が設置され、前記シール部材のうちの一方が前記鍔部の外周面に摺接し、他方が前記側板の外周面に摺接していることを特徴とする請求項1から6のいずれかに記載のカムフォロア。
- スタッドと、そのスタッドに回転自在に組み付けられた軸受組立体とからなり、前記スタッドは、その一端部に前記軸受組立体が回転自在に嵌合された軸受支持部、他端部に取付軸部が設けられ、前記軸受組立体の外輪の外端面に設けられた外端凹部と内端面に設けられた内端凹部に前記軸受支持部の軸方向両端部に設けられた外端規制部と内端規制部がそれぞれ嵌入され、各凹部と前記外端規制部及び内端規制部との間にそれぞれ外端シール及び内端シールが装着されたカムフォロアにおいて、
前記外端シールが前記外端凹部に装着された外端リップシールにより形成され、その外端リップシールのリップ部が軸方向外向きに屈曲され、前記外端規制部の内側コーナ部にR形状部が形成されていることを特徴とするカムフォロア。 - 前記外端規制部が、前記スタッドの外径面に一体に設けられた鍔部により形成されたことを特徴とする請求項8に記載のカムフォロア。
- 前記スタッドが冷間鍛造によって形成され、前記鍔部の内側コーナ部のR形状が前記冷間鍛造の際に形成されたことを特徴とする請求項9に記載のカムフォロア。
- 前記リップ部が、前記R形状部を越えて外端規制部の外径面に前記の屈曲状態で接触されたことを特徴とする請求項8から10のいずれかに記載のカムフォロア。
- 前記内端シールが、前記内端凹部に装着された内端リップシールにより形成され、その内端リップシールのリップ部が軸方向外向きに屈曲され、前記内端規制部の内側コーナ部がR形状に形成されていることを特徴とする請求項8から11のいずれかに記載のカムフォロア。
- 前記内端規制部が、前記スタッドの外径面に圧入固定された内側板により形成されたことを特徴とする請求項8から12のいずれかに記載のカムフォロア。
- 前記内側板が打ち抜き加工により形成され、その内側板の内側コーナ部のR形状がバレル研磨によって形成されたことを特徴とする請求項13に記載のカムフォロア。
- 前記内側板の外側面に当該カムフォロアの品番のマーキングを施したことを特徴とする請求項13又は14のいずれかに記載のカムフォロア。
- 前記内端シールが、ラビリンスシールであることを特徴とする請求項8から15のいずれかに記載のカムフォロア。
- 前記ラビリンスシールが、前記内端凹部の内径面と前記内端規制部の外径面との隙間によって形成されたことを特徴とする請求項8から16のいずれかに記載のカムフォロア。
- 前記リップ部が、前記R形状部を越えて内端規制部の外径面に前記の屈曲状態で接触されたことを特徴とする請求項12から17のいずれかに記載のカムフォロア。
- スタッドと、そのスタッドに回転自在に組み付けられた軸受組立体とからなり、前記スタッドは、その一端部に前記軸受組立体が回転自在に嵌合された軸受支持部、他端部に取付軸部が設けられ、前記軸受組立体は、前記軸受支持部の軸方向両端部に設けられた外端規制部と内端規制部によって軸方向に規制され、前記軸受回転体の外輪と前記各規制部との間にシール部材が介在されたカムフォロアにおいて、
前記スタッドとして、冷間鍛造又は切削加工等を施して各部を形成した一次加工品を用い、前記軸受組立体の内輪として熱処理及び研削加工の施されたものを用い、その内輪を前記軸受支持部に圧入固定したことを特徴とするカムフォロア。 - 前記各シール部材として、滑り性と弾性を兼備し、各規制部の対向内面を被覆する環状部を有し、その環状部の外周縁に屈曲部を形成したワッシャ兼シール部材を用いたことを特徴とする請求項19に記載のカムフォロア。
- 前記外端規制部が、前記内輪とは別体の独立した環状の外側板によって形成され、該外側板が前記内輪の外端面に押し当てられた状態で前記軸受支持部の先端部に圧入固定されたことを特徴とする請求項19又は20に記載のカムフォロア。
- 前記内側規制部が独立した環状の内側板によって形成され前記軸受支持部の内端部に圧入固定され、前記外端規制部が独立した環状の外側板によって形成され、前記外側板が前記内輪の外端面に押し当てられた状態で前記軸受支持部の外端部に圧入固定されたことを特徴とする請求項19に記載のカムフォロア。
- 請求項1乃至22のいずれかに記載のカムフォロアの製造方法であって、
前記カムフォロアスタッドが、軸方向に沿ってファイバーフローが形成された金属棒材を前記軌道部、側板圧入部、取付軸部の基になる形状に形成する筒状のキャビティを有するダイスにセットして前記金属棒材の長手方向にパンチで加圧し、前記鍔部の基になる形状を有する一次成形品を成形する冷間鍛造工程と、前記一次成形品の外周面を研削して前記鍔部、前記軌道部、側板圧入部、前記取付軸部の一部を成形する研削加工工程とによって製造されることを特徴とするカムフォロアの製造方法。 - 前記鍔部の前記軌道部側の付け根を形成する前記ダイスの部分に、ヌスミを形成する突状型が設けられていることを特徴とする請求項23に記載のカムフォロアの製造方法。
- 前記ダイスの前記挿通軸部と前記ネジ部となる箇所の間の前記段差部に所要のテーパの型が形成されていることを特徴とする請求項23または24に記載のカムフォロアの製造方法。
- 前記パンチは、前記鍔部を形成する成形キャビティを備えており、加圧によって変形した前記金属棒材の肉を前記成形キャビティに流し込んで前記鍔部の形状に形成することを特徴とする請求項23乃至25のいずれかに記載のカムフォロアの製造方法。
- 前記冷間鍛造の際に、前記鍔部外端面に、穴底にセンター穴を有する六角穴、及び前記取付軸部外端面にセンター穴を形成することを特徴とする請求項23乃至26のいずれかに記載のカムフォロアの製造方法。
- 前記冷間鍛造工程の後、転造によって前記取付軸部にネジ部を成形する転造工程を備えた請求項23乃至27のいずれかに記載のカムフォロアの製造方法。
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DE112010002968T DE112010002968T5 (de) | 2009-07-17 | 2010-07-14 | Kurvenrolle und Verfahren zum Herstellen der Kurvenrolle |
US13/384,484 US9951855B2 (en) | 2009-07-17 | 2010-07-14 | Cam follower and method for producing cam follower |
CN201080030747.1A CN102472379B (zh) | 2009-07-17 | 2010-07-14 | 凸轮从动件及凸轮从动件的制造方法 |
US14/495,150 US9482332B2 (en) | 2009-07-17 | 2014-09-24 | Cam follower and method for producing cam follower |
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JP2009168955A JP2011021715A (ja) | 2009-07-17 | 2009-07-17 | カムフォロア |
JP2009-168955 | 2009-07-17 | ||
JP2009172169A JP5312243B2 (ja) | 2009-07-23 | 2009-07-23 | カムフォロア及びカムフォロアの製造方法 |
JP2009-172169 | 2009-07-23 | ||
JP2009-180779 | 2009-08-03 | ||
JP2009180779A JP2011033142A (ja) | 2009-08-03 | 2009-08-03 | カムフォロア |
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US13/384,484 A-371-Of-International US9951855B2 (en) | 2009-07-17 | 2010-07-14 | Cam follower and method for producing cam follower |
US14/495,150 Division US9482332B2 (en) | 2009-07-17 | 2014-09-24 | Cam follower and method for producing cam follower |
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Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130118299A1 (en) * | 2011-11-16 | 2013-05-16 | Roller Bearing Company Of America, Inc. | Cam follower for a ram of a necker machine and a method of manufacturing the same |
US10274013B2 (en) | 2011-11-16 | 2019-04-30 | Roller Bearing Company Of America, Inc. | Cam follower with tire having axial movement compensating features |
DE102012102964A1 (de) * | 2012-04-04 | 2013-10-10 | Krones Ag | Kurvenrolle |
JP5884800B2 (ja) * | 2013-09-18 | 2016-03-15 | トヨタ自動車株式会社 | センター孔形成方法及び鍛造装置 |
GB2522204B (en) * | 2014-01-15 | 2016-06-22 | Newlenoir Ltd | Piston arrangement |
EP3001090B1 (en) | 2014-09-25 | 2017-11-08 | Roller Bearing Company of America, Inc. | Self lubricating cam follower assembly |
US10378635B2 (en) * | 2016-04-13 | 2019-08-13 | Kann Manufacturing Corporation | Cam follower roller assembly |
EP3388702B1 (en) | 2017-04-13 | 2020-06-03 | Roller Bearing Company of America, Inc. | A two part seal assembly for a track roller bearing |
US10458468B2 (en) | 2018-01-16 | 2019-10-29 | Roller Bearing Company Of America, Inc. | Cam follower for high axial load applications |
EP3581078A1 (de) * | 2018-06-14 | 2019-12-18 | Jura Elektroapparate AG | Mahlvorrichtung zum mahlen von kaffeebohnen |
EP3680515B1 (en) | 2018-11-16 | 2024-04-10 | Roller Bearing Company of America, Inc. | Maintenance free extended life cam follower for a necker machine |
US11674584B2 (en) * | 2018-11-16 | 2023-06-13 | Roller Bearing Company Of America, Inc. | Maintenance free extended life cam follower for a necker machine |
EP3999751B1 (en) | 2019-07-15 | 2024-04-17 | The Timken Company | Two-piece composite tapered roller bearing outer ring with interference fit |
CN110686011A (zh) * | 2019-10-11 | 2020-01-14 | 常熟市新冶机械制造有限公司 | 一种偏心凸轮的密封圈安装结构 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60184428U (ja) * | 1984-05-16 | 1985-12-06 | エヌ・テ−・エヌ東洋ベアリング株式会社 | 転がり軸受用密封装置 |
JPH01303377A (ja) * | 1988-04-14 | 1989-12-07 | Procal | シールジョイントのユニット |
JPH0632809U (ja) * | 1992-09-30 | 1994-04-28 | エヌティエヌ株式会社 | カムフォロア |
JPH0742809A (ja) * | 1993-07-29 | 1995-02-10 | Ntn Corp | カムフォロア |
JPH10196647A (ja) * | 1997-01-09 | 1998-07-31 | Nippon Thompson Co Ltd | スタッド付トラックローラ軸受 |
JP2000320646A (ja) * | 1999-05-07 | 2000-11-24 | Ntn Corp | カムフォロア |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2126912A (en) * | 1934-12-06 | 1938-08-16 | Gen Motors Corp | Antifriction bearing and its manufacture |
GB1071110A (en) * | 1963-10-18 | 1967-06-07 | Schaeffler Wilhelm | Sealed needle roller bearing |
DE1802743A1 (de) * | 1967-10-16 | 1969-05-14 | Mcgill Mfg Company Ltd | Lagerung fuer eine Laufrolle fuer Kurvenscheiben oder Exzenter |
US3528271A (en) * | 1968-02-02 | 1970-09-15 | Ford Motor Co | Method for rolling a race for a ball bearing |
FR2229885A1 (en) * | 1973-05-15 | 1974-12-13 | Skf Ind Trading & Dev | Lube oil system for ball and roller bearing - oil circulates and drains through radial and axial bores through hub |
US4113327A (en) * | 1976-12-29 | 1978-09-12 | Roller Bearing Company Of America | Combination seal and thrust washer for anti-friction bearings |
JPS60184428A (ja) | 1984-03-01 | 1985-09-19 | Matsushita Electric Ind Co Ltd | プレス成形方法 |
JP2513158Y2 (ja) * | 1991-05-24 | 1996-10-02 | 日本トムソン株式会社 | スタッド形トラックロ―ラ軸受 |
JPH0632809A (ja) | 1992-05-18 | 1994-02-08 | Hitachi Chem Co Ltd | 3次元重合体微粒子、その製造法、低収縮剤及び不飽和ポリエステル樹脂組成物 |
JP3285927B2 (ja) * | 1992-05-25 | 2002-05-27 | エヌティエヌ株式会社 | 分割型軸受軌道輪の製造方法 |
GB2273749B (en) * | 1992-12-08 | 1996-08-28 | Nsk Ltd | A race ring for a rolling bearing and a method of manufacturing it |
JP2513158B2 (ja) | 1994-05-25 | 1996-07-03 | 日本電気株式会社 | プリント配線板の製造方法 |
JP3874479B2 (ja) * | 1997-01-14 | 2007-01-31 | 日本トムソン株式会社 | スタッド付トラックローラ軸受 |
EP0854303B1 (en) * | 1997-01-17 | 2003-10-29 | Nsk Ltd | Rolling bearing unit for supporting vehicle wheel |
JP3914607B2 (ja) * | 1997-05-13 | 2007-05-16 | 日本トムソン株式会社 | スタッド付トラックローラ軸受 |
DE19931087C2 (de) | 1999-07-06 | 2002-07-04 | Nsk Ltd | Nockenscheibe für ein kontinuierlich variables Toroidgetriebe und Verfahren zur Herstellung derselbigen |
JP2003322162A (ja) * | 2002-05-07 | 2003-11-14 | Nippon Thompson Co Ltd | スタッド形トラックローラ軸受 |
JP4216093B2 (ja) * | 2003-02-26 | 2009-01-28 | 日本トムソン株式会社 | 固形潤滑剤入り転がり軸受の製造方法 |
EP1637705A4 (en) * | 2003-06-06 | 2009-11-04 | Nsk Ltd | CULBUTOR AND METHOD OF PRODUCTION |
JP2005083513A (ja) * | 2003-09-10 | 2005-03-31 | Ntn Corp | 車輪用軸受装置 |
JP4413660B2 (ja) * | 2004-03-15 | 2010-02-10 | 日本トムソン株式会社 | 給油プラグ及び給油プラグ付きスタッド形トラックローラ |
JP2008174208A (ja) * | 2006-12-20 | 2008-07-31 | Ntn Corp | 車輪用軸受装置のハブ輪およびその製造方法 |
WO2008075458A1 (ja) * | 2006-12-20 | 2008-06-26 | Ntn Corporation | 車輪用軸受装置のハブ輪およびその製造方法 |
CN101903667A (zh) * | 2007-12-17 | 2010-12-01 | Ntn株式会社 | 双列角轴承、车轮用轴承装置、外圈制造方法以及内圈制造方法 |
-
2010
- 2010-07-14 DE DE112010002968T patent/DE112010002968T5/de not_active Ceased
- 2010-07-14 US US13/384,484 patent/US9951855B2/en not_active Expired - Fee Related
- 2010-07-14 CN CN201080030747.1A patent/CN102472379B/zh not_active Expired - Fee Related
- 2010-07-14 WO PCT/JP2010/061899 patent/WO2011007804A1/ja active Application Filing
-
2014
- 2014-09-24 US US14/495,150 patent/US9482332B2/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60184428U (ja) * | 1984-05-16 | 1985-12-06 | エヌ・テ−・エヌ東洋ベアリング株式会社 | 転がり軸受用密封装置 |
JPH01303377A (ja) * | 1988-04-14 | 1989-12-07 | Procal | シールジョイントのユニット |
JPH0632809U (ja) * | 1992-09-30 | 1994-04-28 | エヌティエヌ株式会社 | カムフォロア |
JPH0742809A (ja) * | 1993-07-29 | 1995-02-10 | Ntn Corp | カムフォロア |
JPH10196647A (ja) * | 1997-01-09 | 1998-07-31 | Nippon Thompson Co Ltd | スタッド付トラックローラ軸受 |
JP2000320646A (ja) * | 1999-05-07 | 2000-11-24 | Ntn Corp | カムフォロア |
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DE112010002968T5 (de) | 2012-10-25 |
US20150013420A1 (en) | 2015-01-15 |
CN102472379A (zh) | 2012-05-23 |
CN102472379B (zh) | 2014-12-03 |
US20120111141A1 (en) | 2012-05-10 |
US9951855B2 (en) | 2018-04-24 |
US9482332B2 (en) | 2016-11-01 |
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