JP4882892B2 - Manufacturing method of bearing device - Google Patents

Manufacturing method of bearing device Download PDF

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JP4882892B2
JP4882892B2 JP2007176119A JP2007176119A JP4882892B2 JP 4882892 B2 JP4882892 B2 JP 4882892B2 JP 2007176119 A JP2007176119 A JP 2007176119A JP 2007176119 A JP2007176119 A JP 2007176119A JP 4882892 B2 JP4882892 B2 JP 4882892B2
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fixed plate
diameter step
fixing plate
outer ring
locking claw
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JP2009014095A (en
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正紀 定村
且弘 池沢
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NSK Ltd
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • 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
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)

Description

本発明は、例えば、トランスミッションにおけるギヤ等の回転支持部に用いられる軸受装置の製造方法に関する。   The present invention relates to a method of manufacturing a bearing device used for a rotation support portion such as a gear in a transmission, for example.

従来のこの種の軸受装置としては、例えば、図５に示すように、内輪１と外輪２との間に複数の転動体３が配設された転がり軸受４と、転がり軸受４の外輪２の軸方向端面に当接して転がり軸受４をハウジングＨに固定する固定プレート５と、を備えるものがある（例えば、特許文献１参照）。   As a conventional bearing device of this type, for example, as shown in FIG. 5, a rolling bearing 4 in which a plurality of rolling elements 3 are disposed between an inner ring 1 and an outer ring 2, and an outer ring 2 of the rolling bearing 4. Some include a fixed plate 5 that abuts the end face in the axial direction and fixes the rolling bearing 4 to the housing H (see, for example, Patent Document 1).

また、自動車の小型化と共にトランスミッションの小型化が要請されており、このような要請に応える軸受装置として、図６に示すように、転がり軸受４の外輪２の外周面の軸方向端部に小径段部６を設け、小径段部６に固定プレート７を嵌合させたものがある（例えば、特許文献２参照）。   Further, there is a demand for downsizing of a transmission along with downsizing of an automobile. As shown in FIG. 6, as a bearing device that meets such a demand, a small diameter is provided at an axial end of an outer peripheral surface of an outer ring 2 of a rolling bearing 4. A stepped portion 6 is provided, and a fixed plate 7 is fitted to the small diameter stepped portion 6 (for example, see Patent Document 2).

この軸受装置は、固定プレート７の軸方向の端部内周部に大径孔部７ａが形成されている。そして、外輪２の小径段部６に固定プレート７を外挿した後、大径孔部７ａの端面の円周方向の複数箇所をプレス装置等により軸方向に押圧することにより、小径段部６に外挿された固定プレート７の内周部に、径方向内側に突出する係止爪８を円周方向の複数箇所に形成して、小径段部６の外周面に形成した係止溝９に係止爪８を係止させる。   In this bearing device, a large-diameter hole portion 7 a is formed in the inner peripheral portion of the axial end portion of the fixed plate 7. Then, after fixing the fixed plate 7 to the small-diameter step portion 6 of the outer ring 2, the small-diameter step portion 6 is pressed by pressing a plurality of circumferential positions on the end surface of the large-diameter hole portion 7 a in the axial direction by a press device or the like. The locking claw 9 is formed on the outer peripheral surface of the small-diameter step portion 6 by forming locking claws 8 projecting radially inward at a plurality of locations in the circumferential direction on the inner peripheral portion of the fixed plate 7 that is externally inserted into the fixing plate 7. The locking claw 8 is locked.

この軸受装置によれば、外輪２の軸方向端面に固定プレート５を当接させる場合（図５参照）に比べて軸方向の寸法を短くすることができ、トランスミッションの小型化を図ることができる。   According to this bearing device, the axial dimension can be shortened compared to the case where the fixed plate 5 is brought into contact with the axial end surface of the outer ring 2 (see FIG. 5), and the transmission can be downsized. .

特開２００４−０２８１２３号公報JP 2004-028123 A 独国特許出願公開１０２００４０３１８３０号明細書German Patent Application Publication No. 102004031830

上記の軸受装置がハウジングに組み込まれた後、ハウジングに固定された固定プレートには比較的大きな力が作用する。そのため、固定プレートには、一般に焼入れを施すなどして、その強度が高められている。そして、上記特許文献２のように転がり軸受と固定プレートとを係止爪で結合した軸受装置においては、一般に係止爪を形成する箇所も含めて固定プレート全体に焼入れが施されている。   After the above-described bearing device is incorporated into the housing, a relatively large force acts on the fixed plate fixed to the housing. Therefore, the strength of the fixed plate is generally increased by quenching. And in the bearing device which connected the rolling bearing and the fixed plate with the latching claw like the said patent document 2, generally hardening is given to the whole stationary plate also including the location which forms a latching claw.

係止爪は、固定プレートの所定箇所を軸方向に押圧し、該箇所を塑性変形させて形成されているが、係止爪を形成する箇所も含めて固定プレート全体に焼入れが施されている場合に、固定プレートの所定箇所に係止爪を形成するに際して該箇所に比較的大きな力を作用させる必要がある。そのため、係止爪の破損や圧壊を招き生産性を低下させる虞があるとともに、そのための専用の装置が必要となる。   The locking claw is formed by pressing a predetermined portion of the fixing plate in the axial direction and plastically deforming the portion, but the entire fixing plate including the portion where the locking claw is formed is quenched. In this case, it is necessary to apply a relatively large force to the locking plate at a predetermined position of the fixing plate. For this reason, there is a risk that the catching claw is broken or collapsed, and the productivity is lowered, and a dedicated device for that purpose is required.

本発明は、このような不都合を解消するためになされたものであり、その目的は、転がり軸受と固定プレートとを係止爪で結合した軸受装置において、その生産性の向上を図ることができる製造方法を提供することにある。   The present invention has been made in order to eliminate such inconveniences, and an object of the present invention is to improve the productivity of a bearing device in which a rolling bearing and a fixed plate are coupled by a locking claw. It is to provide a manufacturing method.

本発明の上記目的は、下記の構成により達成される。
（１）内輪と外輪との間に複数の転動体が配設された転がり軸受と、該転がり軸受をハウジングに固定すべく、前記外輪の軸方向の端部外周部に設けられた小径段部に嵌合される固定プレートと、を備える軸受装置の製造方法であって、
前記固定プレートの内周部の円周方向の複数箇所に係止爪を径方向内側に突設し、前記小径段部の端面に連続して該小径段部の外周部に設けられた係止溝に前記係止爪を係止させて前記転がり軸受と該固定プレートとを結合するに際し、
前記係止爪を形成する前記固定プレートの所定箇所を該固定プレートの他の箇所に対して軟化させる軟化処理を施しておき、
前記小径段部に前記固定プレートを嵌合した後、該固定プレートの前記所定箇所を前記小径段部の端面との間で挟んで軸方向に押圧し、該固定プレートの該所定箇所を径方向内側に膨出させることにより前記係止爪を形成して、実質的に前記外輪を変形させることなく該係止爪を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。
（２）前記軟化処理として、前記固定プレートの前記所定箇所を除き該固定プレートに浸炭処理または浸炭窒化処理を施しておくことを特徴とする上記（１）に記載の軸受装置の製造方法。
（３）前記軟化処理として、前記固定プレートの前記所定箇所を除き該固定プレートに高周波焼入れを施しておくことを特徴とする上記（１）に記載の軸受装置の製造方法。 The above object of the present invention can be achieved by the following constitution.
(1) A rolling bearing in which a plurality of rolling elements are disposed between an inner ring and an outer ring, and a small-diameter step portion provided on an outer peripheral portion of the outer ring in the axial direction so as to fix the rolling bearing to the housing. A method of manufacturing a bearing device comprising:
Locking claws projecting radially inward at a plurality of locations in the circumferential direction of the inner peripheral portion of the fixed plate, and are provided on the outer peripheral portion of the small diameter step portion continuously from the end surface of the small diameter step portion. When connecting the rolling bearing and the fixed plate by locking the locking claw in the groove,
Applying a softening process to soften a predetermined portion of the fixing plate forming the locking claw with respect to other portions of the fixing plate,
After the fixing plate is fitted to the small diameter step portion, the predetermined portion of the fixing plate is sandwiched between the end surface of the small diameter step portion and pressed in the axial direction, and the predetermined portion of the fixing plate is radially A method of manufacturing a bearing device, wherein the locking claw is formed by bulging inward, and the locking claw is locked in the locking groove without substantially deforming the outer ring .
(2) The method for manufacturing a bearing device according to (1) above, wherein as the softening treatment, carburizing treatment or carbonitriding treatment is performed on the fixed plate except for the predetermined portion of the fixed plate.
(3) The method for manufacturing a bearing device according to (1) above, wherein, as the softening treatment, induction hardening is performed on the fixed plate except for the predetermined portion of the fixed plate.

本発明によれば、係止爪を形成する固定プレートの内周部の所定箇所を該固定プレートの他の箇所に対して軟化させる軟化処理が施されているので、係止爪を形成するに際して、前記所定箇所に作用させる力を低減させることができる。それにより、係止爪の破損や圧壊を回避して、軸受装置の生産性を向上させることができる。さらに、係止爪は、塑性変形の過程で加工硬化が生じ、十分な強度が確保される。   According to the present invention, the softening process is performed to soften the predetermined portion of the inner peripheral portion of the fixing plate forming the locking claw with respect to the other portion of the fixing plate. The force applied to the predetermined location can be reduced. Thereby, breakage and crushing of the locking claw can be avoided, and the productivity of the bearing device can be improved. Further, the locking claws are hardened in the process of plastic deformation, and sufficient strength is ensured.

以下、本発明に係る軸受装置の一実施形態について、図面を参照して詳細に説明する。
図１は本発明に係る軸受装置の一実施形態を説明するための要部断面図、図２は外輪の小径段部に固定プレートが嵌合固定された状態を示す斜視図、図３は図２の背面側から見た斜視図、図４は転がり軸受の外輪と固定プレートとを結合する工程を説明するための図である。 Hereinafter, an embodiment of a bearing device according to the present invention will be described in detail with reference to the drawings.
1 is a cross-sectional view of a main part for explaining an embodiment of a bearing device according to the present invention, FIG. 2 is a perspective view showing a state in which a fixing plate is fitted and fixed to a small-diameter step portion of the outer ring, and FIG. The perspective view seen from the back side of 2 and FIG. 4 are the figures for demonstrating the process of couple | bonding the outer ring | wheel and fixed plate of a rolling bearing.

本実施形態の軸受装置１０は、図１に示すように、転がり軸受１１と、該転がり軸受１１をハウジング（不図示）に固定すべく、転がり軸受１１の外周部に嵌合される固定プレート１２と、を備える。   As shown in FIG. 1, the bearing device 10 of the present embodiment includes a rolling bearing 11 and a fixing plate 12 that is fitted to the outer peripheral portion of the rolling bearing 11 so as to fix the rolling bearing 11 to a housing (not shown). And comprising.

転がり軸受１１は、内周面に外輪軌道面１３ａを有する外輪１３と、外周面に内輪軌道面１４ａを有する内輪１４と、内輪軌道面１４ａと外輪軌道面１３ａとの間に円周方向に転動可能に配設された複数の転動体１５と、複数の転動体１５を円周方向に略等間隔に保持する保持器１６と、外輪１３の軸方向の両端部内周部にそれぞれ装着されて、軸受空間と外部との間をシールするシール部材１７と、を有する。   The rolling bearing 11 rolls in a circumferential direction between an outer ring 13 having an outer ring raceway surface 13a on an inner peripheral surface, an inner ring 14 having an inner ring raceway surface 14a on an outer peripheral surface, and the inner ring raceway surface 14a and the outer ring raceway surface 13a. A plurality of rolling elements 15 that are movably disposed, a cage 16 that holds the plurality of rolling elements 15 at substantially equal intervals in the circumferential direction, and inner peripheral portions of both ends in the axial direction of the outer ring 13 are respectively mounted. And a seal member 17 that seals between the bearing space and the outside.

また、外輪１３の軸方向の端部外周部には、固定プレート１２が嵌合される小径段部１８が形成されており、小径段部１８の外周面の軸方向内側寄りには、小径段部１８の端面１８ａに連続する係止溝１９が周方向全周にわたって形成されている。   A small-diameter step portion 18 to which the fixing plate 12 is fitted is formed on the outer peripheral portion of the outer ring 13 in the axial direction, and the small-diameter step portion is disposed on the inner side in the axial direction of the outer peripheral surface of the small-diameter step portion 18. A locking groove 19 that is continuous with the end surface 18a of the portion 18 is formed over the entire circumference.

一方、固定プレート１２は、鋼材で形成され、図２および図３に示すように、外形が略三角形のフランジ状をなしており、三角形状の３つの頂点側にはボルト（不図示）の挿通穴２０が形成されている。なお、図２および図３では、便宜上、転がり軸受１０の外輪１３のみを示している。   On the other hand, the fixing plate 12 is made of steel and has a substantially triangular flange shape as shown in FIGS. 2 and 3, and bolts (not shown) are inserted on the three apex sides of the triangular shape. A hole 20 is formed. 2 and 3, only the outer ring 13 of the rolling bearing 10 is shown for convenience.

また、図１および図３に示すように、固定プレート１２の内周部には、外輪１３の小径段部１８に形成された係止溝１９に係止される係止爪２１が径方向内側に突出して形成されている。この係止爪２１は、本実施形態では、円周方向に略等間隔で３箇所形成されており、また、３箇所の係止爪２１は、固定プレート１２の三角形状の３つの頂点側にそれぞれ配置されている。   As shown in FIGS. 1 and 3, a locking claw 21 that is locked in a locking groove 19 formed in the small-diameter step portion 18 of the outer ring 13 is radially inward on the inner peripheral portion of the fixed plate 12. Is formed to protrude. In the present embodiment, the latching claws 21 are formed at three locations at substantially equal intervals in the circumferential direction, and the three latching claws 21 are provided on the three apexes of the triangular shape of the fixed plate 12. Each is arranged.

次に、図４を参照して、軸受装置１０の組み立てについて説明する。
本実施形態では、固定プレート１２を外輪１３の小径段部１８に嵌合した後、固定プレート１２の内周部の所定箇所に係止爪２１を形成して、転がり軸受１１の外輪１３と固定プレート１２とを結合する。 Next, assembly of the bearing device 10 will be described with reference to FIG.
In the present embodiment, after the fixing plate 12 is fitted to the small-diameter step portion 18 of the outer ring 13, a locking claw 21 is formed at a predetermined location on the inner peripheral portion of the fixing plate 12 to fix the outer ring 13 of the rolling bearing 11. The plate 12 is coupled.

ここで、固定プレート１２には、係止爪２１を形成する固定プレート１２の内周部の所定箇所を他の箇所に対して軟化させる軟化処理が施されている。軟化処理としては、固定プレート１２の前記所定箇所を除き固定プレート１２に浸炭処理または浸炭窒化処理を施しておく、あるいは、固定プレート１２の前記所定箇所を除き高周波焼入れを施しておく、等、局部的に焼き入れを施す処理が好適である。   Here, the fixing plate 12 is subjected to a softening process that softens a predetermined portion of the inner peripheral portion of the fixing plate 12 that forms the locking claw 21 with respect to other portions. As the softening treatment, the fixed plate 12 is subjected to carburizing treatment or carbonitriding except for the predetermined portion of the fixed plate 12, or is subjected to induction hardening except for the predetermined portion of the fixed plate 12. In general, a quenching treatment is preferred.

図４（Ａ）に示すように、外輪１３の小径段部１８に固定プレート１２を嵌合した後、固定プレート１２の内周部周縁の円周方向の複数箇所を小径段部１８の端面１８ａとの間で挟んでプレス装置等により端面１８ａ側に向けて軸方向に押圧する。かかる押圧により、図４（Ｂ）に示すように、固定プレート１２の内周部周縁の円周方向の複数箇所における小径段部１８の端面１８ａとの接触部位を径方向内側に膨出させるように塑性変形させて係止爪２１を形成し、係止爪２１を小径段部１８の係止溝１９に係止させる。これにより、転がり軸受１１の外輪１３と固定プレート１２とが結合されて、軸受装置１０が組み立てられる。   As shown in FIG. 4A, after the fixed plate 12 is fitted to the small-diameter step portion 18 of the outer ring 13, a plurality of circumferential positions on the periphery of the inner peripheral portion of the fixed plate 12 are arranged on the end surface 18 a of the small-diameter step portion 18. Is pressed in the axial direction toward the end face 18a by a press device or the like. With this pressing, as shown in FIG. 4 (B), contact portions with the end surface 18a of the small-diameter step portion 18 at a plurality of locations in the circumferential direction on the peripheral edge of the inner peripheral portion of the fixed plate 12 bulge radially inward. Then, the locking claw 21 is formed by plastic deformation, and the locking claw 21 is locked in the locking groove 19 of the small diameter step portion 18. Thereby, the outer ring | wheel 13 and the fixed plate 12 of the rolling bearing 11 are couple | bonded, and the bearing apparatus 10 is assembled.

以上説明したように、本実施形態の軸受装置１０によれば、係止爪２１を形成する固定プレート１２の内周部の所定箇所を固定プレート１２の他の箇所に対して軟化させる軟化処理が施されているので、係止爪２１を形成するに際して、前記所定箇所に作用させる力を低減させることができる。それにより、係止爪２１の破損や圧壊を回避して、軸受装置１０の生産性を向上させることができる。さらに、係止爪２１は、塑性変形の過程で加工硬化が生じ、十分な強度が確保される。   As described above, according to the bearing device 10 of the present embodiment, the softening process for softening the predetermined portion of the inner peripheral portion of the fixed plate 12 that forms the locking claw 21 with respect to other portions of the fixed plate 12 is performed. Therefore, when the locking claw 21 is formed, the force applied to the predetermined portion can be reduced. Thereby, breakage and crushing of the locking claw 21 can be avoided, and the productivity of the bearing device 10 can be improved. Further, the locking claw 21 undergoes work hardening in the process of plastic deformation, and sufficient strength is ensured.

なお、本発明の内輪、外輪、転動体、転がり軸受、固定プレート、係止溝、係止爪、小径段部等の構成は、上記一実施形態に例示したものに限定されるものではなく、本発明の要旨を逸脱しない範囲において適宜変更可能である。   The configurations of the inner ring, outer ring, rolling element, rolling bearing, fixed plate, locking groove, locking claw, small diameter step, etc. of the present invention are not limited to those exemplified in the above embodiment, Modifications can be made as appropriate without departing from the scope of the present invention.

例えば、上記実施形態では、固定プレート１２の内周部に３箇所の係止爪２１を形成した場合を例示したが、これに限定されず、固定プレート１２の内周部に２箇所あるいは４箇所以上の係止爪２１を形成してもよい。
また、上記実施形態では、小径段部１８の外周面の周方向全周に係止溝１９を形成した場合を例示したが、これに限定されず、例えば、小径段部１８の外周面の複数箇所に周方向に延びる係止溝を形成するようにしてもよい。 For example, in the above embodiment, the case where the three locking claws 21 are formed on the inner peripheral portion of the fixed plate 12 is illustrated, but the present invention is not limited to this, and two or four locations are provided on the inner peripheral portion of the fixed plate 12. The above locking claws 21 may be formed.
Moreover, in the said embodiment, although the case where the locking groove 19 was formed in the circumferential direction perimeter of the outer peripheral surface of the small diameter step part 18 was illustrated, it is not limited to this, For example, the some of the outer peripheral surface of the small diameter step part 18 You may make it form the locking groove extended in the circumferential direction in a location.

本発明に係る軸受装置の一実施形態を説明するための要部断面図である。It is principal part sectional drawing for demonstrating one Embodiment of the bearing apparatus which concerns on this invention. 外輪の小径段部の外周部に固定プレートが嵌合固定された状態を示す斜視図である。It is a perspective view which shows the state by which the fixing plate was fitted and fixed to the outer peripheral part of the small diameter step part of an outer ring. 図２の背面側から見た斜視図である。It is the perspective view seen from the back side of FIG. 転がり軸受の外輪と固定プレートとを結合する工程を説明するための図であり、（Ａ）は結合前の状態を示す要部断面図、（Ｂ）は結合後の状態を示す要部断面図である。It is a figure for demonstrating the process of couple | bonding the outer ring | wheel and rolling plate of a rolling bearing, (A) is principal part sectional drawing which shows the state before coupling | bonding, (B) is principal part sectional drawing which shows the state after coupling | bonding. It is. 従来の軸受装置を説明するための要部断面図である。It is principal part sectional drawing for demonstrating the conventional bearing apparatus. 従来の他の軸受装置を説明するための要部断面図である。It is principal part sectional drawing for demonstrating the other conventional bearing apparatus.

符号の説明Explanation of symbols

１０ 軸受装置
１１ 転がり軸受
１２ 固定プレート
１３ 外輪
１４ 内輪
１５ 転動体
１８ 小径段部
１９ 係止溝
２１ 係止爪 DESCRIPTION OF SYMBOLS 10 Bearing apparatus 11 Rolling bearing 12 Fixed plate 13 Outer ring 14 Inner ring 15 Rolling element 18 Small diameter step part 19 Locking groove 21 Locking claw

Claims (3)

内輪と外輪との間に複数の転動体が配設された転がり軸受と、該転がり軸受をハウジングに固定すべく、前記外輪の軸方向の端部外周部に設けられた小径段部に嵌合される固定プレートと、を備える軸受装置の製造方法であって、
前記固定プレートの内周部の円周方向の複数箇所に係止爪を径方向内側に突設し、前記小径段部の端面に連続して該小径段部の外周部に設けられた係止溝に前記係止爪を係止させて前記転がり軸受と該固定プレートとを結合するに際し、
前記係止爪を形成する前記固定プレートの所定箇所を該固定プレートの他の箇所に対して軟化させる軟化処理を施しておき、
前記小径段部に前記固定プレートを嵌合した後、該固定プレートの前記所定箇所を前記小径段部の端面との間で挟んで軸方向に押圧し、該固定プレートの該所定箇所を径方向内側に膨出させることにより前記係止爪を形成して、実質的に前記外輪を変形させることなく該係止爪を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。 A rolling bearing in which a plurality of rolling elements are disposed between an inner ring and an outer ring, and a small-diameter step provided on the outer peripheral portion of the outer ring in the axial direction so as to fix the rolling bearing to the housing. A bearing plate comprising: a fixed plate;
Locking claws projecting radially inward at a plurality of locations in the circumferential direction of the inner peripheral portion of the fixed plate, and are provided on the outer peripheral portion of the small diameter step portion continuously from the end surface of the small diameter step portion. When connecting the rolling bearing and the fixed plate by locking the locking claw in the groove,
Applying a softening process to soften a predetermined portion of the fixing plate forming the locking claw with respect to other portions of the fixing plate,
After the fixing plate is fitted to the small diameter step portion, the predetermined portion of the fixing plate is sandwiched between the end surface of the small diameter step portion and pressed in the axial direction, and the predetermined portion of the fixing plate is radially A method of manufacturing a bearing device, wherein the locking claw is formed by bulging inward, and the locking claw is locked in the locking groove without substantially deforming the outer ring . 前記軟化処理として、前記固定プレートの前記所定箇所を除き該固定プレートに浸炭処理または浸炭窒化処理を施しておくことを特徴とする請求項１に記載の軸受装置の製造方法。   2. The method for manufacturing a bearing device according to claim 1, wherein, as the softening treatment, carburizing treatment or carbonitriding treatment is performed on the fixed plate except for the predetermined portion of the fixed plate. 3. 前記軟化処理として、前記固定プレートの前記所定箇所を除き該固定プレートに高周波焼入れを施しておくことを特徴とする請求項１に記載の軸受装置の製造方法。   The method for manufacturing a bearing device according to claim 1, wherein, as the softening treatment, induction hardening is performed on the fixed plate except for the predetermined portion of the fixed plate.
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