WO2016031644A1 - 軸受装置及び軸受装置の製造方法 - Google Patents
軸受装置及び軸受装置の製造方法 Download PDFInfo
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- WO2016031644A1 WO2016031644A1 PCT/JP2015/073225 JP2015073225W WO2016031644A1 WO 2016031644 A1 WO2016031644 A1 WO 2016031644A1 JP 2015073225 W JP2015073225 W JP 2015073225W WO 2016031644 A1 WO2016031644 A1 WO 2016031644A1
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- Prior art keywords
- peripheral surface
- small
- outer peripheral
- diameter hole
- outer ring
- Prior art date
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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
- 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
- F16C35/042—Housings for rolling element bearings for rotary movement
- F16C35/045—Housings for rolling element bearings for rotary movement with a radial flange to mount the housing
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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
- 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
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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
- 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
- F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring
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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
- 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
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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
- F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
- F16C2226/50—Positive connections
- F16C2226/52—Positive connections with plastic deformation, e.g. caulking or staking
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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
- F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
- F16C2226/50—Positive connections
- F16C2226/60—Positive connections with threaded parts, e.g. bolt and nut connections
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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
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/61—Toothed gear systems, e.g. support of pinion shafts
Definitions
- the present invention relates to a bearing device and a manufacturing method of the bearing device, and more particularly to a bearing device used for a rotation support portion such as a gear in a transmission or a differential device, and a manufacturing method of the bearing device.
- a bearing device that supports a rotating shaft provided with pulleys, gears, and the like of an automobile transmission
- a rolling bearing in which a plurality of rolling elements are disposed between an inner ring and an outer ring, and an outer ring of the rolling bearing are provided.
- a fixed plate that abuts against the axial end face and fixes the rolling bearing to the housing.
- FIG. 11 and 12 show a bearing device 100 described in Patent Document 3, and includes a radial rolling bearing 110 and a substantially triangular plate-like fixing plate 120 that fixes the radial rolling bearing 110 to a housing (not shown). .
- a small diameter step portion 112 is formed on the outer peripheral surface of the axial end portion of the outer ring 111 of the radial rolling bearing 110.
- the axial length L2 of the small diameter step 112 is substantially the same as the plate thickness T2 of the fixed plate 120.
- a locking groove 113 is formed on the outer peripheral surface of the small-diameter step portion 112 along the entire circumference in the circumferential direction.
- the fixing plate 120 includes three mounting holes 124 provided corresponding to the respective apexes of the triangle, and fitting holes 121 that are fitted to the small diameter step portion 112 of the outer ring 111 so as to allow relative rotation. Prepare. Three recesses 123 having a radius larger than the radius of the fitting hole 121 are formed in the inner peripheral portion of the fitting hole 121. After the small diameter step 112 is fitted into the fitting hole 121, the recess A central portion of the circumferential direction 123 is pressed in the axial direction by a punch of a press device to be plastically deformed, and a locking claw 122 protruding radially inward is formed on the inner peripheral portion of the fitting hole 121. Thereby, the latching claw 122 is latched by the latching groove 113 of the small diameter step part 112, and the outer ring
- the functions required for the locking claws 122 formed on the inner peripheral portion of the fitting hole 121 include the following. 1.
- the radial rolling bearing 110 and the fixed plate 120 are assembled without separation. 2.
- the tip of the locking claw 122 does not interfere with the locking groove 113 and does not hinder the relative rotation between the radial rolling bearing 110 and the fixed plate 120. 3.
- the tip of the locking claw 122 does not interfere with the outer ring 111 so that burrs that cause contamination are not generated.
- the locking claw 122 In order to satisfy such a function, it is important to suppress variation in shape between the respective locking claws 122. For this reason, when the locking claw 122 is molded, it is necessary to mold the locking claw 122 with the outer ring 111 and the fixed plate 120 aligned as much as possible.
- the fixed plate 120 since the fixed plate 120 is set in a shape that avoids interference with components arranged in the transmission, the outer shape of the fixed plate 120 is used unless a dedicated alignment surface is additionally formed. Centering is difficult. Therefore, when the locking claw 122 is formed, the radial rolling bearing 110 is fixed to the mold on the basis of the outer diameter of the outer ring 111 with high accuracy and the like, and the fixing plate 120 is fitted to the outer ring 111 to position the relative position. Is required.
- the outer diameter of the small-diameter step portion 112 of the outer ring 111 and the inner diameter of the fitting hole 121 of the fixed plate 120 are set with high accuracy (tolerance reduction as much as possible). There is a need to.
- the heat-treated outer ring 111 and the fixed plate 120 require additional processing such as turning and grinding, and this processing is very difficult to cut due to the removal processing for the material hardened by the heat treatment, and the bearing device 100. This is one of the reasons for increasing the manufacturing cost.
- the outer ring 111 is ground on the outer peripheral surface 111a and both side surfaces 111b in order to improve the mounting accuracy to the housing or the like, but the fixing plate 120 is fitted to the outer ring 111 of Patent Document 3. It is necessary to perform additional grinding on the outer diameter of the small diameter step 112. Further, in order to prevent interference with the outer ring 111 when the locking claw 122 is formed, the fitting hole 121 is not a single circle, but has a complicated shape having a recess 123 in the inner peripheral portion, which increases the number of processing steps. there were.
- the locking claw 122 without performing such additional processing and with a large guide clearance between the outer ring 111 and the fixed plate 120.
- the outer ring 111 and the fixed plate 120 are formed. Therefore, the length of the locking claw 122 needs to be increased so that the locking claw 122 does not come off the locking groove 113 even if it is greatly decentered within the range of the guide clearance.
- the depth of the locking groove 113 is increased, and there is a risk that the strength of the outer ring 111 is reduced or that the thin wall portion is cracked during quenching. .
- the present invention has been made in view of the above-described problems, and the object thereof is to enable the positioning of the outer ring and the fixing plate with a simple structure with high accuracy, and to prevent the interference with the outer ring and to stabilize the locking claw. It is an object of the present invention to provide a bearing device and a method for manufacturing the bearing device that can be molded to reduce the manufacturing cost.
- a rolling bearing comprising an inner ring, an outer ring provided with a small-diameter stepped portion on the outer peripheral portion in the axial direction, and a plurality of rolling elements arranged to be freely rollable between the inner and outer rings, A fixing plate attached to the outer ring so as to be relatively rotatable, and for fixing the rolling bearing to the housing;
- a bearing device comprising: A locking groove extending in the circumferential direction is formed on the outer peripheral surface of the small diameter step portion, The inner peripheral surface of the fixed plate is stepped with a small diameter hole portion facing the outer peripheral surface of the small diameter step portion, and a large diameter hole portion having an inner diameter larger than that of the small diameter hole portion and facing the outer peripheral surface of the outer ring.
- the radial clearance between the outer peripheral surface of the outer ring and the large-diameter hole is such that the fixing plate is guided to the outer ring by the large-diameter hole.
- the fixing plate is set to be smaller than the radial clearance with the hole, and the fixing plate protrudes radially inward from the inner peripheral portion of the fixing plate that defines the small-diameter hole, and is fixed to the locking groove.
- a bearing device comprising a locking claw.
- the fixed plate includes a first thinning portion formed on the periphery of the inner peripheral surface of the small diameter hole portion and the side surface of the fixed plate, and the locking claw includes at least the first thinning portion.
- the bearing device according to (1) wherein the inner peripheral portion of the fixed plate is formed by pressing in an axial direction.
- a rolling bearing comprising an inner ring, an outer ring provided with a small-diameter stepped portion on the outer peripheral portion in the axial direction, and a plurality of rolling elements disposed so as to be able to roll between the inner and outer rings;
- a fixing plate attached to the outer ring so as to be relatively rotatable, and for fixing the rolling bearing to the housing;
- a method of manufacturing a bearing device comprising: A locking groove extending in the circumferential direction is formed on the outer peripheral surface of the small diameter step portion, The inner peripheral surface of the fixed plate is stepped with a small diameter hole portion facing the outer peripheral surface of the small diameter step portion, and a large diameter hole portion having an inner diameter larger than that of the small diameter hole portion and facing the outer peripheral surface of the outer ring.
- the radial clearance between the outer peripheral surface of the outer ring and the large-diameter hole is set smaller than the radial clearance between the outer peripheral surface of the small-diameter stepped portion and the small-diameter hole located axially outside the locking groove,
- the inner periphery of the fixed plate that defines the small diameter hole is pressed in the axial direction to The portion is plastically deformed so as to bulge inward in the radial direction to form a locking claw, and locked in a locking groove formed in the circumferential direction on the outer peripheral surface of the small-diameter stepped portion.
- the small diameter step portion is formed with a locking groove extending in the circumferential direction on the outer peripheral surface, and the inner peripheral surface of the fixed plate is a small diameter hole portion facing the outer peripheral surface of the small diameter step portion. And a large-diameter hole portion having an inner diameter larger than that of the small-diameter hole portion and facing the outer peripheral surface of the outer ring, so that the fixed plate is guided to the outer ring by the large-diameter hole portion.
- the radial clearance between the outer peripheral surface of the outer ring and the large-diameter hole is set smaller than the radial clearance between the outer peripheral surface of the small-diameter stepped portion located on the axially outer side of the locking groove and the small-diameter hole, and
- the fixed plate is provided to protrude radially inward from the inner peripheral portion of the fixed plate that defines the small-diameter hole, and includes a plurality of locking claws that are locked in the locking groove. Therefore, the fixed plate is guided to the outer peripheral surface of the outer ring that has already been ground by a large-diameter hole, and the fixed plate and the outer ring are not locked by locking the locking claw in the locking groove. Assembled in separation.
- the small-diameter step portion only needs to exhibit the function of making the locking claw non-separable in the locking groove, the axial length of the small-diameter step portion can be shortened, and the strength of the outer ring can be improved. it can.
- the radial clearance between the outer peripheral surface of the outer ring and the large-diameter hole is the outer peripheral surface of the small-diameter step portion and the small-diameter hole that are located axially outside the locking groove.
- the small-diameter step portion only needs to exhibit the function of making the locking claw non-separable in the locking groove, the axial length of the small-diameter step portion can be shortened, and the strength of the outer ring can be improved. it can.
- (A) is the perspective view which looked at the bearing apparatus which concerns on one Embodiment of this invention from the surface side
- (b) is the perspective view seen from the back surface side. It is a back surface side top view of the bearing apparatus of FIG. (A) is the III-III sectional view taken on the line of FIG. 2,
- (b) is the III section enlarged view of (a).
- (A) is a fragmentary sectional view of the bearing apparatus which concerns on the 1st modification of this embodiment
- (b) is a principal part enlarged view of (a). It is sectional drawing for demonstrating the dimension conditions of the small diameter step part, taper part, small diameter hole part, large diameter hole part, and punch which are required for the assembly
- (A) is the perspective view which looked at the conventional bearing apparatus from the back surface side, (b) is a back surface side top view.
- (A) is the XII-XII sectional view taken on the line of FIG.11 (b), (b) is the XII section enlarged view of Fig.12 (a).
- the bearing device 10 is assembled to the radial rolling bearing 30 and the radial rolling bearing 30 so as to be relatively rotatable and non-separately assembled. And a fixing plate 40 for fixing to.
- the radial rolling bearing 30 includes an outer ring 31 having an outer ring raceway 32 on an inner peripheral surface, an inner ring 33 having an inner ring raceway 34 on an outer peripheral surface, and a retainer 36.
- a ball 35 as a plurality of rolling elements is provided between the inner ring raceway 32 and the inner ring raceway 34 so as to be freely rollable.
- sealing members 38 are disposed between the outer ring 31 and the inner ring 33 at both axial ends of the outer ring 31 to seal the radial rolling bearing 30.
- a small-diameter step portion 37 having a step portion outer peripheral surface 37a having a diameter smaller than the outer diameter of the outer ring 31 and a step surface 37b extending radially outward from the step portion outer peripheral surface 37a is provided on the outer peripheral portion of one end portion in the axial direction of the outer ring 31. Is formed.
- a locking groove 37c is formed along the entire circumference in the circumferential direction of the stepped portion outer circumferential surface 37a. In the embodiment shown in the figure, the axial inner wall of the locking groove 37c is formed continuously with the step surface 37b. However, the locking groove 37c is formed in the middle in the axial direction of the stepped outer peripheral surface 37a. May be. In this case, the axial inner wall of the locking groove 37c is formed at a position different from the step surface 37b.
- the fixed plate 40 is a substantially hexagonal plate-like member in which short sides 40a and long sides 40b are alternately arranged in the circumferential direction, and a small diameter step of the outer ring 31 is at the center.
- a small-diameter hole portion 41 facing the stepped outer peripheral surface 37a of the portion 37, a large-diameter hole adjacent to the small-diameter hole portion 41 and having an inner diameter larger than the small-diameter hole portion 41 and facing the outer peripheral surface 31a of the outer ring 31 Part 42 is formed.
- the large diameter hole portion 42 is a hole having a depth L3 formed from the surface 44 side of the fixed plate 40, and a step surface 43 extending in the radial direction is formed between the small diameter hole portion 41 and the large diameter hole portion 42. Is formed.
- the fixed plate 40 is formed with boss portions 45 that protrude toward the surface 44 side of the fixed plate 40 at three equally spaced circumferential positions corresponding to the short side 40a.
- a mounting hole 46 through which a fastening screw (not shown) for fixing the bearing device 10 to the housing is screwed or inserted is formed in the boss portion 45.
- Such a fixed plate 40 is first manufactured by press working in which a large-diameter hole portion 42 is formed from the surface 44 side of the fixed plate 40 and then a small-diameter hole portion 41 is formed by punching. Moreover, it can also manufacture by a cutting process irrespective of press work. In addition, since the small diameter hole part 41 is a single circle, compared with the conventional fixed plate 120 (refer FIG. 11), manufacture of a press die and shaping
- the peripheral edge of the inner peripheral surface of the small diameter hole portion 41 and the back surface 47 of the fixing plate 40 protrudes radially inward from the inner peripheral portion of the small diameter hole portion 41 by a crushing process to be described later, and the locking groove of the outer ring 31.
- Locking claws 49 for locking with 37c are formed in three places. The locking claw 49 is formed so that the outer ring 31 and the fixed plate 40 can rotate relative to each other without interfering with the outer peripheral surface 37a of the stepped portion of the outer ring 31 and the locking groove 37c.
- the outer ring 31 and the fixed plate 40 have the outer diameter of the step outer peripheral surface 37a of the small diameter step portion 37 as ⁇ 1 and the inner diameter of the small diameter hole portion 41 as shown in FIG. T1> T2 (preferably 2), where ⁇ 2, the outer diameter of the outer ring 31 is ⁇ 3, the inner diameter of the large-diameter hole 42 is ⁇ 4, the plate thickness of the fixed plate 40 is T1, and the plate thickness of the small-diameter hole 41 is T2.
- outer peripheral surface 31a and both axial side surfaces 31b of the outer ring 31 are surfaces on which the housing 60 is fitted or abutted, they are usually ground and finished with high accuracy.
- the stepped portion outer peripheral surface 37a, the stepped surface 37b, and the locking groove 37c of the small-diameter stepped portion 37 do not require relatively high accuracy, and thus are cutting surfaces by normal turning. No additional processing by polishing has been applied.
- the small-diameter step portion 37 of the outer ring 31 is inserted into the small-diameter hole portion 41 of the fixed plate 40, and the outer peripheral surface 31 a of the outer ring 31 is set in the large-diameter hole portion 42 of the fixed plate 40.
- the fixed plate 40 is set on the rolling bearing 30 by bringing the stepped surface 43 of the large-diameter hole portion 42 and the stepped surface 37b of the small-diameter stepped portion 37 into contact with each other.
- the peripheral edge on the back surface 47 side of the small-diameter hole 41 is pressed in the axial direction (downward in FIG. 6) by the punch 50 of the press device.
- the punch 50 is brought into contact with the back surface 47 of the fixed plate 40 to start crushing, and plastic deformation is performed so that the peripheral edge of the small-diameter hole 41 bulges inward in the radial direction. It is formed toward the inside.
- the locking claw 49 In the process of forming the locking claw 49, since the radial clearance C is provided between the inner peripheral surface of the small diameter hole portion 41 and the step outer peripheral surface 37a of the small diameter step portion 37, the locking claw to be formed is formed. A clearance is maintained between the tip of the claw 49 and the stepped outer peripheral surface 37a, and interference between the locking claw 49 and the stepped outer peripheral surface 37a is prevented. As shown in FIG. 6B, when the punch 50 is lowered to a predetermined position and the crushing process is finished, the locking claw 49 is located at the bottom of the locking groove 37c at the intermediate position in the axial direction of the locking groove 37c. It is formed in a state where it is locked with a gap between.
- the locking claw 49 is locked in the locking groove 37c formed in the outer peripheral surface 37a of the step portion, and the radial rolling bearing 30 and the fixed plate 40 are assembled in a state where they are not separated and can be relatively rotated.
- the large-diameter hole portion 42 of the fixed plate 40 is usually fitted with a predetermined guide clearance to the outer peripheral surface 31a of the outer ring 31 that is ground and finished with high accuracy.
- the fixing plate 40 is positioned with reference to the outer peripheral surface 31a of the outer ring 31.
- the fitting hole 121 of the fixed plate 120 is fitted to the small diameter step portion 112 of the outer ring 111, so that additional processing such as grinding is required on the outer peripheral surface 112a of the small diameter step portion 112.
- the fixing plate 40 can be accurately positioned without applying any special processing to the outer ring 31.
- a radial clearance C is provided between the small-diameter hole portion 41 of the fixed plate 40 and the stepped portion outer peripheral surface 37a of the outer ring 31, and the stepped portion outer peripheral surface 37a does not constitute a guide surface.
- a high dimensional accuracy is not required for 37a, and a cutting surface obtained by turning with a low machining cost is used as it is.
- the locking claw 49 is formed with respect to the fixed plate 40 that is accurately positioned with respect to the outer ring 31, variations in the shape (length) of the locking claw 49 are suppressed. Therefore, it is not necessary to set the depth of the locking groove 37c locked by the locking claw 49, and the possibility of burning cracks in the thin portion due to heat treatment is reduced.
- the positional accuracy of the fixing plate 40 is ensured by the outer peripheral surface 31a of the outer ring 31, and the non-separation function between the outer ring 31 and the fixing plate 40 is due to the locking between the locking groove 37c and the locking claw 49.
- the function required for the latching claw 49 can be satisfied by suppressing the variation of the latching claw 49 while suppressing the cost.
- the fixing plate 40 and the bearing 30 do not separate and need to rotate relative to each other. It is formed in a shape with a gap between the engagement groove 37c.
- an axial load acts on the fixing plate 40, and the fixing plate 40 is slightly deformed. To do.
- the locking claw 49 is formed in a position and shape that does not interfere (contact) with the groove bottom and both side walls of the locking groove 37c. With this configuration, the locking claw 49 only needs to secure strength sufficient to withstand the inertial force of the bearing 30 during transportation and assembly. Therefore, the locking claw 49 can be downsized and the application range of the bearing device 10 can be expanded. Reduction of press load (reduction of assembly cost) becomes possible.
- the fixed plate 40 is positioned by fitting the large-diameter hole portion 42 to the outer peripheral surface 31a of the outer ring 31 with a predetermined guide clearance, as shown in FIG. 3 and FIG.
- the axial length W1 of the outer peripheral surface 31a of the outer ring 31 of this embodiment is equal to the axial length L3 of the large-diameter hole portion 42.
- the length can be increased (W1> W2).
- the axial length (W1-L3) between the left side surface 31b of the outer ring 31 and the surface 44 of the fixed plate 40 is the same as the axial length W2 of the outer peripheral surface 111a in the conventional bearing device 100.
- the conventional housing shape can be applied as it is without changing the housing shape.
- the small-diameter step portion 37 is formed with the locking groove 37 c extending in the circumferential direction on the step portion outer peripheral surface 37 a, and the inner peripheral surface of the fixed plate 40.
- the small diameter step portion 37 of the small diameter step portion 37 has a small diameter hole portion 41 opposed to the step portion outer peripheral surface 37a, a large diameter larger than the small diameter hole portion 41, and a large diameter that guides the rolling bearing 30 facing the outer peripheral surface 31a of the outer ring 31. And a stepped shape.
- the radial clearance between the outer peripheral surface 31a of the outer ring 31 and the large-diameter hole portion 42 is smaller than the locking groove 37c in the axial direction so that the fixed plate 40 is guided to the outer ring 31 by the large-diameter hole portion 42. It is set to be smaller than the radial clearance C between the step portion outer peripheral surface 37 a of the step portion 37 and the small diameter hole portion 41.
- the fixed plate 40 includes a plurality of locking claws 49 that protrude radially inward from the inner peripheral portion of the fixed plate 40 that defines the small-diameter hole portion 41 and that are locked in the locking grooves 37c.
- the fixing plate 40 is guided by the large-diameter hole portion 42 to the outer peripheral surface 31a of the outer ring 31 that has already been ground, and is fixed by locking the locking claw 49 in the locking groove 37c.
- the plate 40 and the outer ring 31 are assembled inseparably. This eliminates the need to guide the fixed plate 40 with the stepped outer peripheral surface 37a of the small diameter stepped portion 37, and eliminates the need for high-precision additional processing such as grinding on the stepped outer peripheral surface 37a of the small diameter stepped portion 37.
- the small diameter step part 37 should just exhibit the function which makes the latching claw 49 non-separable in the latching groove 37c, can reduce the axial direction length L1 of the small diameter step part 37, and the outer ring
- the radial clearance between the outer peripheral surface of the outer ring 31 and the large-diameter hole portion 42 is the step portion of the small-diameter step portion 37 positioned axially outside the locking groove 37c.
- the inner peripheral surface of the fixed plate 40 is set to be smaller than the radial clearance C between the outer peripheral surface 37a and the small-diameter hole portion 41, and the small-diameter hole portion 41 facing the step outer peripheral surface 37a of the small-diameter step portion 37 and the small-diameter hole It has a larger inner diameter than the portion 41, and has a large-diameter hole portion 42 that faces the outer peripheral surface 31 a of the outer ring 31 and guides the rolling bearing 30, and is formed in a stepped shape.
- the locking claw 49 is formed by pressing and plastically deforming the inner peripheral portion of the fixed plate 40 so as to bulge radially inward, and extends in the circumferential direction on the step outer peripheral surface 37a of the small diameter step portion 37. It locks in the formed locking groove 37c.
- the small diameter step part 37 should just exhibit the function which makes the latching claw 49 inseparable in the latching groove 37c, the axial direction length of the small diameter step part 37 can be shortened, and the intensity
- a tapered portion 48 as a first wall removal portion is formed in advance on the peripheral edge between the inner peripheral surface and the rear surface 47 of the small-diameter hole portion 41 of the fixing plate 40. Also good.
- the tapered portion 48 in the fixing plate 40 in advance, it is possible to reliably prevent interference with the outer peripheral surface 37a of the stepped portion in the process of forming the locking claw 49, and to stably form the locking claw 49. can do.
- FIG. 8 shows conditions regarding the shapes of the radial rolling bearing 30 and the fixed plate 40 for forming the locking claw 49 without interfering with the outer ring 31 in the bearing device 10 of the present modification. That is, as shown in FIG. 8, the outer diameter of the small diameter step portion 37 is ⁇ 1, the inner diameter of the small diameter hole portion 41 is ⁇ 2, the outer diameter of the outer ring 31 is ⁇ 3, the inner diameter of the large diameter hole portion 42 is ⁇ 4, and the taper portion 48
- the outer diameter is ⁇ 5
- the outer diameter of the punch 50 is ⁇ 6, and the inner diameter of the punch 50 is ⁇ 7, ⁇ 2 ⁇ ⁇ 7> ⁇ 1, ⁇ 3> ⁇ 7, and ⁇ 3> ⁇ 2 are satisfied.
- the shape of the tapered portion 48 such as the angle and the axial length is arbitrarily set according to the thickness of the fixed plate 40 and the like.
- the procedure for assembling the fixed plate 40 satisfying such conditions to the outer ring 31 is to press the inner peripheral portion of the fixed plate 40 including the part of the tapered portion 48 and the back surface 47 in the axial direction, thereby
- the locking claw 49 is formed by plastically deforming the portion so as to bulge radially inward.
- the protrusion height and the formation position of the latching claw 49 are stabilized, and the latching claw 49 and the latching groove 37c are securely latched, so that the bearing 30 and the fixed plate 40 can be assembled.
- the engaging claw 49 can be formed in a shape having no corners, and the claw 49 is locally cracked or missing due to the formation process of the engaging claw 49 or contact with the outer ring 31 after molding. Can be reliably suppressed.
- the large-diameter hole portion 42 of the fixing plate 40 is fitted to the outer peripheral surface 31a of the outer ring 31 with a predetermined guide clearance, and the step of the large-diameter hole portion 42 is fitted.
- the fixed plate 40 is set on the rolling bearing 30, and then the punch 50 of the press device is moved to the taper portion 48 of the small-diameter hole portion 41 and the back surface of the fixed plate 40. It arrange
- the punch 50 is first brought into contact with the back surface 47 of the fixed plate 40 and the crushing process is started. Subsequently, the tapered portion 48 is crushed and plastically deformed, and the locking claw 49 is radially inward, that is, a stepped portion. It begins to protrude toward the outer peripheral surface 37a.
- the locking claw 49 is positioned at the locking groove 37c at the intermediate position in the axial direction of the locking groove 37c. It is formed in a state where it is locked with a gap between the bottom of the two. 7 may be a convex curved surface portion or a concave curved surface portion.
- the fixed plate 40 includes the tapered portion 48 formed on the peripheral edge between the inner peripheral surface of the small diameter hole portion 41 and the back surface 47 of the fixed plate 40.
- the latching claw 49 is formed by pressing the inner peripheral portion of the fixed plate 40 in the axial direction including at least the taper portion 48, so that the latching claw 49 is stabilized while preventing interference with the outer ring 31.
- the productivity of the bearing device 10 can be improved.
- the locking groove 37c of the small-diameter stepped portion 37 is, as in the second modification shown in FIG. 10, a second metal removal at the periphery of the axially outer wall 37d of the locking groove 37c and the stepped portion outer peripheral surface 37a.
- a tapered portion 39 as a portion may be formed.
- the tapered portion 39 shown in FIG. 10 can also be a convex curved surface portion or a concave curved surface portion.
- a pawl may be formed.
- a locking claw You may make it form the some locking groove extended in the circumferential direction in the location where is formed.
- Bearing device Radial rolling bearing (rolling bearing) 31 Outer ring 31a Outer peripheral surface 33 Inner ring 35 Ball (rolling element) 37 Small-diameter stepped portion 37a Stepped portion outer peripheral surface 37b Stepped surface 37c Locking groove 39 Tapered portion (second thinned portion) 40 Fixed plate 41 Small diameter hole 42 Large diameter hole 48 Tapered part (first thinning part) 49 Locking Claw C Radial clearance between the outer peripheral surface of the small diameter step and the small diameter hole
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
Description
1.ラジアル転がり軸受110と固定プレート120とを、不分離に組み付ける。
2.係止爪122の先端が、係止溝113と干渉せず、ラジアル転がり軸受110と固定プレート120と相対回転を阻害しない。
3.係止爪122の成形過程で、係止爪122の先端が外輪111と干渉するなどしてコンタミの原因となるバリを発生させない。
(1) 内輪と、軸方向の端部外周部に小径段部が設けられた外輪と、内外輪間に転動自在に配設された複数の転動体と、を備える転がり軸受と、
外輪に相対回転可能に取り付けられて、転がり軸受をハウジングに固定するための固定プレートと、
を備える軸受装置であって、
小径段部には、外周面に円周方向に延びる係止溝が形成され、
固定プレートの内周面は、小径段部の外周面と対向する小径孔部と、小径孔部より大きな内径を有し、外輪の外周面と対向する大径孔部と、を備えて段付き形状に形成され、
固定プレートが大径孔部で外輪に案内されるように、外輪の外周面と大径孔部との径方向すきまが、係止溝より軸方向外側に位置する小径段部の外周面と小径孔部との径方向すきまよりも小さく設定され、且つ
固定プレートは、小径孔部を画成する固定プレートの内周部から径方向内側に突出して設けられ、係止溝に係止する複数の係止爪を備えることを特徴とする軸受装置。
(2) 固定プレートは、小径孔部の内周面と固定プレートの側面との周縁に形成された第1の除肉部を備え、係止爪は、第1の除肉部を少なくとも含んで固定プレートの内周部を軸方向に押圧して形成することを特徴とする(1)に記載の軸受装置。
(3) 外輪は、小径段部の外周面と係止溝の側面との周縁に第2の除肉部を有することを特徴とする(1)または(2)に記載の軸受装置。
(4) 内輪と、軸方向の端部外周部に小径段部が設けられた外輪と、内外輪間に転動自在に配設された複数の転動体と、を備える転がり軸受と、
外輪に相対回転可能に取り付けられて、転がり軸受をハウジングに固定するための固定プレートと、
を備える軸受装置の製造方法であって、
小径段部には、外周面に円周方向に延びる係止溝が形成され、
固定プレートの内周面は、小径段部の外周面と対向する小径孔部と、小径孔部より大きな内径を有し、外輪の外周面と対向する大径孔部と、を備えて段付き形状に形成され、
外輪の外周面と大径孔部との径方向すきまが、係止溝より軸方向外側に位置する小径段部の外周面と小径孔部との径方向すきまよりも小さく設定され、
大径孔部を外輪の外周面に案内させて、転がり軸受に固定プレートをセットした後、小径孔部を画成する固定プレートの内周部を軸方向に押圧して、固定プレートの内周部を径方向内側に膨出するように塑性変形させて係止爪を形成し、小径段部の外周面に円周方向に延びて形成された係止溝に係止させることを特徴とする軸受装置の製造方法。
図6(a)に示すように、先ず、固定プレート40の小径孔部41に外輪31の小径段部37を挿入し、固定プレート40の大径孔部42に外輪31の外周面31aを所定の案内すきまを持って嵌合させ、大径孔部42の段差面43と小径段部37の段差面37bとを当接させて転がり軸受30に固定プレート40をセットする。
なお、テーパ部48の角度、軸方向長さなどの形状は、固定プレート40の厚さなどに応じて任意に設定される。
なお、図7に示すテーパ部48は、凸状の曲面部や凹状の曲面部とすることもできる。
なお、図10に示すテーパ部39も、凸状の曲面部や凹状の曲面部とすることもできる。
30 ラジアル転がり軸受(転がり軸受)
31 外輪
31a 外周面
33 内輪
35 玉(転動体)
37 小径段部
37a 段部外周面
37b 段差面
37c 係止溝
39 テーパ部(第2の除肉部)
40 固定プレート
41 小径孔部
42 大径孔部
48 テーパ部(第1の除肉部)
49 係止爪
C 小径段部の外周面と小径孔部との径方向すきま
Claims (4)
- 内輪と、軸方向の端部外周部に小径段部が設けられた外輪と、前記内外輪間に転動自在に配設された複数の転動体と、を備える転がり軸受と、
前記外輪に相対回転可能に取り付けられて、前記転がり軸受をハウジングに固定するための固定プレートと、
を備える軸受装置であって、
前記小径段部には、外周面に円周方向に延びる係止溝が形成され、
前記固定プレートの内周面は、前記小径段部の外周面と対向する小径孔部と、前記小径孔部より大きな内径を有し、前記外輪の外周面と対向する大径孔部と、を備えて段付き形状に形成され、
前記固定プレートが前記大径孔部で前記外輪に案内されるように、前記外輪の外周面と前記大径孔部との径方向すきまが、前記係止溝より軸方向外側に位置する前記小径段部の外周面と前記小径孔部との径方向すきまよりも小さく設定され、且つ
前記固定プレートは、前記小径孔部を画成する前記固定プレートの内周部から径方向内側に突出して設けられ、前記係止溝に係止する複数の係止爪を備えることを特徴とする軸受装置。 - 前記固定プレートは、前記小径孔部の内周面と前記固定プレートの側面との周縁に形成された第1の除肉部を備え、
前記係止爪は、前記第1の除肉部を少なくとも含んで前記固定プレートの内周部を軸方向に押圧して形成することを特徴とする請求項1に記載の軸受装置。 - 前記外輪は、前記小径段部の外周面と前記係止溝の側面との周縁に第2の除肉部を有することを特徴とする請求項1または2に記載の軸受装置。
- 内輪と、軸方向の端部外周部に小径段部が設けられた外輪と、前記内外輪間に転動自在に配設された複数の転動体と、を備える転がり軸受と、
前記外輪に相対回転可能に取り付けられて、前記転がり軸受をハウジングに固定するための固定プレートと、
を備える軸受装置の製造方法であって、
前記小径段部には、外周面に円周方向に延びる係止溝が形成され、
前記固定プレートの内周面は、前記小径段部の外周面と対向する小径孔部と、前記小径孔部より大きな内径を有し、前記外輪の外周面と対向する大径孔部と、を備えて段付き形状に形成され、
前記外輪の外周面と前記大径孔部との径方向すきまが、前記係止溝より軸方向外側に位置する前記小径段部の外周面と前記小径孔部との径方向すきまよりも小さく設定され、
前記大径孔部を前記外輪の外周面に案内させて、前記転がり軸受に前記固定プレートをセットした後、前記小径孔部を画成する前記固定プレートの内周部を軸方向に押圧して、前記固定プレートの内周部を径方向内側に膨出するように塑性変形させて係止爪を形成し、前記小径段部の外周面に円周方向に延びて形成された前記係止溝に係止させることを特徴とする軸受装置の製造方法。
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CN109072981A (zh) * | 2016-03-30 | 2018-12-21 | Ntn株式会社 | 滚动轴承装置以及板一体型滚动轴承 |
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