JP5394799B2 - Fixing method of rolling bearing - Google Patents

Fixing method of rolling bearing Download PDF

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JP5394799B2
JP5394799B2 JP2009092057A JP2009092057A JP5394799B2 JP 5394799 B2 JP5394799 B2 JP 5394799B2 JP 2009092057 A JP2009092057 A JP 2009092057A JP 2009092057 A JP2009092057 A JP 2009092057A JP 5394799 B2 JP5394799 B2 JP 5394799B2
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bearing
bearing housing
housing
caulking
recess
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JP2010242855A (en
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剛 佐藤
武嗣 五味
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Oriental Motor Co Ltd
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Oriental Motor Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067Fixing them in a housing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04Bearings 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
    • F16C19/06Bearings 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2380/00Electrical apparatus
    • F16C2380/26Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators

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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、回転電機の回転軸を支持する転がり軸受、あるいは電動アクチュエータのボールネジを支持する転がり軸受を軸受ハウジング内に固定する転がり軸受の固定方法に関する。 The present invention is a rolling bearing for supporting the rotary shaft of the rotary electric machine, or a rolling bearing for supporting the ball screw of the electric actuator concerning the method of fixing a rolling bearing to be fixed to the bearing housing.

小型電動機などの回転電機、あるいはボールネジを利用した電動アクチュエータなどでは、回転軸あるいはボールネジを支持する軸受に転がり玉軸受が用いられている。   In a rotating electrical machine such as a small electric motor or an electric actuator using a ball screw, a rolling ball bearing is used as a bearing that supports the rotating shaft or the ball screw.

転がり玉軸受の固定方法には、従来、次の図7に示すような固定方式A〜Dが採用されている。
図7(A)に示す固定方式は、スナップリングを用いた固定方式で、100は軸受ハウジング、101は転がり玉軸受、102は回転軸である。転がり玉軸受101は、軸受ハウジング100の凹部103内に配置され、回転軸102を回転自在に支持している。転がり玉軸受101は、外輪101aの内部側軸方向端面を軸受ハウジング100の凹部103の軸方向内壁面103aに当接して固定され、内輪101bの軸方向端面を回転軸102に装着された軸用スナップリング104によって係止されている。また、転がり玉軸受101は、外輪101aの外部側軸方向端面を凹部103内壁面に装着された穴用スナップリング105を介して固定されている。
Conventionally, fixing methods A to D as shown in FIG. 7 are employed as a method of fixing the rolling ball bearing.
The fixing method shown in FIG. 7A is a fixing method using a snap ring, where 100 is a bearing housing, 101 is a rolling ball bearing, and 102 is a rotating shaft. The rolling ball bearing 101 is disposed in the recess 103 of the bearing housing 100 and supports the rotating shaft 102 in a freely rotatable manner. The rolling ball bearing 101 is fixed to an axially attached end surface of the outer ring 101 a in contact with the axial inner wall surface 103 a of the recess 103 of the bearing housing 100, and the axial end surface of the inner ring 101 b is attached to the rotary shaft 102. Locked by the snap ring 104. Further, the rolling ball bearing 101 is fixed to the outer side axial end surface of the outer ring 101a via a hole snap ring 105 attached to the inner wall surface of the recess 103.

図7(B)に示す固定方式は、リテーナプレートによる固定方式で、200は軸受ハウジング、201は転がり玉軸受、202は回転軸である。転がり玉軸受201は、軸受ハウジング200の凹部203内に配置され、回転軸202を回転自在に支持している。転がり玉軸受201は、外輪201aの内部側軸方向端面を軸受ハウジング200の凹部203の軸方向内壁面203aに当接して固定され、内輪201bの軸方向端面を回転軸202に装着された軸用スナップリング204によって係止されている。また、転がり玉軸受201は、外輪201aの外部側軸方向端面を軸受ハウジング200の端面203にリテーナ固定ネジ205によって装着されたリテーナプレート206を介して固定されている。   The fixing method shown in FIG. 7B is a fixing method using a retainer plate, in which 200 is a bearing housing, 201 is a rolling ball bearing, and 202 is a rotating shaft. The rolling ball bearing 201 is disposed in the recess 203 of the bearing housing 200 and supports the rotating shaft 202 in a freely rotatable manner. The rolling ball bearing 201 is fixed to an axially attached end surface of the outer ring 201 a in contact with the axial inner wall surface 203 a of the recess 203 of the bearing housing 200, and the axial end surface of the inner ring 201 b is attached to the rotary shaft 202. Locked by the snap ring 204. In the rolling ball bearing 201, the outer axial end surface of the outer ring 201a is fixed to the end surface 203 of the bearing housing 200 via a retainer plate 206 attached by a retainer fixing screw 205.

図7(C)に示す固定方式は、穴用スナップリングによる固定方式で、300は軸受ハウジング、301は転がり玉軸受、302は回転軸である。転がり玉軸受301は、軸受ハウジング300の凹部303内に配置され、回転軸302を回転自在に支持している。転がり玉軸受301は、外輪301aの内部側軸方向端面を軸受ハウジング300の凹部303の軸方向内壁面303aに当接して固定され、内輪301bの軸方向端面を回転軸302に装着された軸用スナップリング304によって係止されている。また、転がり玉軸受301は、外輪301aの外部側軸方向端面を軸受ハウジング300の凹部303内に配置された穴用スナップリング(SI型)305によって押さえられている。   The fixing method shown in FIG. 7C is a fixing method using a snap ring for holes, wherein 300 is a bearing housing, 301 is a rolling ball bearing, and 302 is a rotating shaft. The rolling ball bearing 301 is disposed in the recess 303 of the bearing housing 300 and supports the rotating shaft 302 in a rotatable manner. The rolling ball bearing 301 is fixed to an axially attached end surface of the outer ring 301 a in contact with the axial inner wall surface 303 a of the recess 303 of the bearing housing 300, and the axial end face of the inner ring 301 b is mounted on the rotary shaft 302. It is locked by a snap ring 304. Further, in the rolling ball bearing 301, the outer axial end face of the outer ring 301a is held by a hole snap ring (SI type) 305 disposed in the recess 303 of the bearing housing 300.

図7(D)に示す固定方式は、インサートリング鋳込み+接着剤による固定方式で、400は軸受ハウジング、401は転がり玉軸受、402は回転軸である。転がり玉軸受401は、軸受ハウジング400の凹部403内に配置され、回転軸402を回転自在に支持している。転がり玉軸受401は、外輪401aの内部側軸方向端面を軸受ハウジング400の凹部403の軸方向内壁面403aに当接して固定され、内輪401bの外部側軸方向端面を回転軸402の段差部402aに係止されている。この転がり玉軸受401は、外輪401aの周面と、軸受ハウジング400の凹部403の内壁面との間にインサートリング404がダイカスト鋳込みと接着剤の使用によって固着されている。
表1は、上記従来の固定方式をまとめて表したものである。
The fixing method shown in FIG. 7D is a fixing method using insert ring casting + adhesive, 400 is a bearing housing, 401 is a rolling ball bearing, and 402 is a rotating shaft. The rolling ball bearing 401 is disposed in the recess 403 of the bearing housing 400 and supports the rotating shaft 402 in a freely rotatable manner. The rolling ball bearing 401 is fixed with the inner axial end surface of the outer ring 401 a in contact with the axial inner wall surface 403 a of the recess 403 of the bearing housing 400, and the outer axial end surface of the inner ring 401 b is fixed to the stepped portion 402 a of the rotating shaft 402. It is locked to. In this rolling ball bearing 401, an insert ring 404 is fixed between the peripheral surface of the outer ring 401a and the inner wall surface of the recess 403 of the bearing housing 400 by die casting and using an adhesive.
Table 1 summarizes the conventional fixing methods.

Figure 0005394799
Figure 0005394799

表1から明らかなように、従来の軸受固定方法によると、スナップリングを用いた固定方式(A)では、軸方向に隙間を生じ、軸方向に遊びができる点、クリープ対策が施せない点において問題である。また、固定方式(B)では、省スペース性、コストの点で問題である。さらに、固定方式(C)では、クリープ対策で問題であり、固定方式(D)では、組立性、接着強度の管理、コストの点で問題である。   As is apparent from Table 1, according to the conventional bearing fixing method, in the fixing method (A) using the snap ring, a gap is generated in the axial direction, and play is possible in the axial direction. It is a problem. Further, the fixing method (B) is problematic in terms of space saving and cost. Further, the fixing method (C) is a problem in terms of creep countermeasures, and the fixing method (D) is a problem in terms of assemblability, adhesion strength management, and cost.

特許文献1には、接着剤を用いた方法が開示されている。
ところで、部品の固定にカシメ加工を利用する方法が知られている(特許文献2参照)。この方法は、図8に示すように、ハウジング500と前カバー501をカシメ加工によって固定する方法である。この方法では、ハウジング500の外周に設けられたフランジ502に前カバー501の片面を押し当て、取付部503の端面をかしめて変形部503aとフランジ502とで前カバー501をハウジング500に固定している。このとき、ハウジング500の内径側への変形を防ぐために端面に凹部503bを形成して内径側への変形を防いでいる。
Patent Document 1 discloses a method using an adhesive.
By the way, a method of using caulking for fixing parts is known (see Patent Document 2). In this method, as shown in FIG. 8, the housing 500 and the front cover 501 are fixed by caulking. In this method, one surface of the front cover 501 is pressed against the flange 502 provided on the outer periphery of the housing 500, the end surface of the mounting portion 503 is crimped, and the front cover 501 is fixed to the housing 500 with the deformed portion 503a and the flange 502. Yes. At this time, in order to prevent deformation of the housing 500 toward the inner diameter side, a recess 503b is formed on the end surface to prevent deformation toward the inner diameter side.

実開昭63−193120号公報Japanese Utility Model Publication No. 63-193120 特開2007−288939号公報JP 2007-288939 A

しかしながら、ハウジング500の固定に取付部503の端面をかしめて、変形部503aとフランジ502とで前カバー501をハウジング500に固定するために、ハウジング500の内径側への変形を防ぐために端面に凹部503bを形成する必要がある。ハウジング500の内径側にはベアリングが装着されるため、内径側に突出部が形成されると、ベアリングの組みつけができなくなる不具合が発生する。   However, in order to fix the front cover 501 to the housing 500 with the deformed portion 503a and the flange 502 by crimping the end surface of the mounting portion 503 to fix the housing 500, a concave portion is formed on the end surface to prevent deformation of the housing 500 toward the inner diameter side. It is necessary to form 503b. Since a bearing is mounted on the inner diameter side of the housing 500, if a protrusion is formed on the inner diameter side, a problem that the bearing cannot be assembled occurs.

本発明は、上記課題を解決し、転がり軸受を組付け後に、ハウジングをかしめることにより、転がり軸受を固定し、部品点数の削減を図ることができる転がり軸受の固定方法を提供することを目的とする。 An object of the present invention is to solve the above-mentioned problems and to provide a rolling bearing fixing method capable of fixing the rolling bearing and reducing the number of parts by caulking the housing after the rolling bearing is assembled. And

本発明は、上記課題を解決するため、電動機の回転軸等を支持する軸受を軸受ハウジング内に固定する方法において、前記軸受を軸受ハウジングの凹部内にすき間ばめするとともに、該軸受ハウジングの凹部の開口端部を軸受の周縁部に沿ってカシメ加工により内径側にかしめて、前記軸受の外輪端面を前記軸受ハウジングの塑性加工部および内径収縮部によって係止し、前記軸受を保持する軸受ハウジングを、塑性加工可能な材質で構成し、前記軸受ハウジングの凹部周縁に設けられた肩部を、鋭利な断面を有するカシメパンチで円周方向に沿ってカシメ加工し、前記軸受ハウジングの材質および外径寸法毎に、ハウジング深さ、カシメパンチ断面形状、カシメパンチ押し込み量の3要素を最適化する事により塑性加工部を形成したことにある。
また、本発明は、電動機の回転軸等を支持する軸受を軸受ハウジング内に固定する方法において、前記軸受を軸受ハウジングの凹部内にすき間ばめするとともに、該軸受ハウジングの凹部の開口端部を軸受の周縁部に沿ってカシメ加工により内径側にかしめて、前記軸受の外輪端面を前記軸受ハウジングの塑性加工部および内径収縮部によって係止し、前記軸受を保持する軸受ハウジングを、塑性加工可能な材質で構成し、前記軸受ハウジングの凹部より約0.2mmの周縁に設けられた肩部を、刃先角度を、軸受ハウジングの凹部側は、45°〜50°に形成され、軸受ハウジングの外周側は、15〜30°の鋭利な断面を有するカシメパンチで円周方向に沿ってカシメ加工し、前記軸受ハウジングの材質および外径寸法毎に、ハウジング深さ、カシメパンチ断面形状、カシメパンチ押し込み量の3要素を最適化する事により塑性加工部を形成したことにある。
The present invention for solving the above problems, a method of fixing the bearing supporting the rotation shaft or the like of the motor in the bearing housing, as well as clearance fit the bearing in the recess of the bearing housing, the recess of the bearing housing The bearing housing holds the bearing by caulking the opening end of the bearing to the inner diameter side by caulking along the peripheral edge of the bearing, and locking the outer ring end surface of the bearing by the plastic working portion and the inner diameter contraction portion of the bearing housing. The shoulder portion provided on the peripheral edge of the concave portion of the bearing housing is caulked along the circumferential direction with a caulking punch having a sharp cross section, and the material and outer diameter of the bearing housing are for each dimension, the housing depth, crimping punch sectional shape, to the formation of the plastic working portion by optimizing the three elements of crimping punch push-in amount That.
The present invention also provides a method of securing a bearing for supporting the rotation shaft or the like of the motor in the bearing housing, as well as clearance fit in the bearing in the recess of the bearing housing, the open end of the recess of the bearing housing The bearing housing that holds the bearing can be plastically worked by caulking along the periphery of the bearing to the inner diameter side by caulking and locking the outer ring end surface of the bearing with the plastic working portion and the inner diameter contraction portion of the bearing housing. The shoulder portion provided at a peripheral edge of about 0.2 mm from the concave portion of the bearing housing is formed with a blade edge angle, and the concave portion side of the bearing housing is formed at 45 ° to 50 °. side is caulked along circumferentially crimping punch having a sharp cross section of 15 to 30 °, for each material and the outer diameter of the bearing housing, the housing depth , It lies in the formation of the plastic working portion by optimizing crimping punch sectional shape, the three elements of crimping punch push-in amount.

本発明によれば、軸受の固定にスラスト方向のガタを発生させることが無く、小部品あるいは副資材を用いることなく、安価な軸受の固定方法を提供することができる。また、軸受ハウジングが、塑性加工可能な材質で構成されていることから、カシメ加工を容易に行うことができる。さらに、本発明によれば、カシメパンチで円周方向に沿ってカシメ加工するので、塑性加工部によって、軸受を確実に保持することができる。またさらに、上記軸受ハウジングの材質及びハウジング直径毎に、ハウジング深さ、カシメパンチ断面形状、カシメパンチ押し込み量を設定するので、最適な塑性加工部によって、軸受を確実に保持することができる。 According to the present invention, it is possible to provide an inexpensive bearing fixing method without generating backlash in the thrust direction for fixing the bearing and without using small parts or auxiliary materials. In addition, since the bearing housing is made of a material that can be plastically processed, caulking can be easily performed. Furthermore, according to the present invention, since the caulking process is performed along the circumferential direction with the caulking punch, the bearing can be reliably held by the plastic processing portion. Furthermore, since the housing depth, caulking punch cross-sectional shape, and caulking punch push-in amount are set for each material of the bearing housing and the housing diameter, the bearing can be reliably held by the optimum plastic working portion .

本発明の実施の形態による転がり軸受の固定方法および固定構造を示す部分断面図で、(A1)(B1)(C1)はカシメ前の軸受を示す断面図、(A2)(B2)(C2)はカシメ後の軸受を示す断面図、(A3)(B3)(C3)はカシメ後の塑性加工状態を示す断面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a fragmentary sectional view which shows the fixing method and fixing structure of a rolling bearing by embodiment of this invention, (A1) (B1) (C1) is sectional drawing which shows the bearing before crimping, (A2) (B2) (C2) Are sectional views showing the bearing after crimping, and (A3), (B3) and (C3) are sectional views showing the plastic working state after crimping. 軸受ハウジングに対する加工部位の位置関係とカシメパンチの形状を示す概念断面図である。It is a conceptual sectional view showing the positional relationship of the processing part with respect to the bearing housing and the shape of the caulking punch. カシメパンチの刃先形状を示す概念図である。It is a conceptual diagram which shows the blade-tip shape of a caulking punch. カシメ加工の方法を示し、(a)は円周同時にカシメ加工を行う場合の概念図、(b)は回転対称に4分割にカシメ加工を行う場合の概念図、(c)は回転対称に3分割にカシメ加工を行う場合の概念図である。FIG. 6 shows a caulking method, (a) is a conceptual diagram when caulking is performed at the same time on the circumference, (b) is a conceptual diagram when caulking is performed in four rotations symmetrically, and (c) is 3 in rotational symmetry. It is a conceptual diagram in the case of performing a crimping process to a division | segmentation. (A1)〜(A3)は、押し込み量d寸法を少なくした場合の塑性変形を示す断面図、(B1)〜(B3)は、カシメパンチ刃先角θ寸法の鋭角化によって塑性変形の量を調節する断面図である。(A1) to (A3) are cross-sectional views showing plastic deformation when the amount of indentation d is reduced, and (B1) to (B3) adjust the amount of plastic deformation by sharpening the caulking punch tip angle θ dimension. It is sectional drawing. 本発明の他の実施の形態による軸受の固定方法を示す断面図である。It is sectional drawing which shows the fixing method of the bearing by other embodiment of this invention. 従来の転がり玉軸受の固定方法を示し、(A)に示す固定方式は、スナップリングを用いた固定方式を示す断面図、(B)に示す固定方式は、リテーナプレートによる固定方式を示す断面図、(C)に示す固定方式は、穴用スナップリングによる固定方式を示す断面図、(D)に示す固定方式は、インサートリング鋳込み+接着剤による固定方式を示す断面図である。A conventional rolling ball bearing fixing method is shown, the fixing method shown in (A) is a sectional view showing a fixing method using a snap ring, and the fixing method shown in (B) is a sectional view showing a fixing method using a retainer plate. (C) is a sectional view showing a fixing method using a snap ring for holes, and the fixing method shown in (D) is a sectional view showing a fixing method using insert ring casting + adhesive. 部品の固定にカシメ加工を用いた従来の固定方法を示す部分断面図である。It is a fragmentary sectional view which shows the conventional fixing method which used the crimping process for fixation of components.

転がり軸受を組付け後に、ハウジングをかしめることにより、軸受の固定にスラスト方向のガタを発生させることが無く、転がり軸受を軸受ハウジングの塑性加工部によって係止して固定し、部品点数の削減を図った。   By caulking the housing after assembling the rolling bearing, there is no play in the thrust direction when fixing the bearing, and the rolling bearing is locked and fixed by the plastic processing part of the bearing housing, reducing the number of parts. I planned.

以下本発明の実施の形態を、図面を参照しながら詳細に説明する。
図1(A1)ないし(C3)は、本発明の転がり軸受の固定方法を説明するための部分断面図であって、図1(A1)は、モータフランジなどの軸受ハウジング1のハウジング深さ寸法LをLに設定した状態を示し、図1(B1)は、ハウジング深さ寸法LをLに設定した状態を示し、図1(C1)は、ハウジング深さ寸法LをLに設定した状態を示している。ここで、L>L>Lの関係になっている。図1(A2)(B2)(C2)は、図1(A1)(B1)(C1)の状態からカシメ後の状態を示す部分断面図である。図1(A3)(B3)(C3)は、図1(A2)(B2)(B3)の部分拡大図である。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 (A1) to (C3) are partial cross-sectional views for explaining a method of fixing a rolling bearing according to the present invention. FIG. 1 (A1) is a housing depth dimension of a bearing housing 1 such as a motor flange. L a indicates the status set to L 1, FIG. 1 (B1) shows a state of setting the housing depth L to L 2, FIG. 1 (C1) is set a housing depth L to L 3 Shows the state. Here, the relationship is L 1 > L 2 > L 3 . 1 (A2), (B2), and (C2) are partial cross-sectional views showing a state after crimping from the states of FIGS. 1 (A1), (B1), and (C1). 1 (A3), (B3), and (C3) are partial enlarged views of FIGS. 1 (A2), (B2), and (B3).

図1(A1)ないし図1(C3)において、軸受ハウジング1の凹部1a内には、転がり玉軸受2が配置され、転がり玉軸受2の中心軸上に回転軸3が支持されている。転がり玉軸受2は、リング状の外輪2aと、外輪2aより小径で、同心円筒状に配置されたリング状の内輪2bと、外輪2aと内輪2bとの間で保持具によって回転自在に保持されたボール2cによって構成されている。転がり玉軸受2は、軸受ハウジング1の凹部1a内にすき間ばめされており、外輪2a端面が、凹部1aの開口端面1bからハウジング深さLだけ凹部1a内に入り込むようにすき間ばめされている。転がり玉軸受2は内輪2bによって回転軸3を回転自在に支持している。φは転がり玉軸受2の外径を表している。回転軸3は、モータの回転子を支持するもので、固定子との間に生じる回転磁界によって回転駆動されるものである。   In FIG. 1 (A1) thru | or FIG. 1 (C3), the rolling ball bearing 2 is arrange | positioned in the recessed part 1a of the bearing housing 1, and the rotating shaft 3 is supported on the center axis | shaft of the rolling ball bearing 2. In FIG. The rolling ball bearing 2 is rotatably held by a holder between a ring-shaped outer ring 2a, a ring-shaped inner ring 2b having a smaller diameter than the outer ring 2a and arranged concentrically, and the outer ring 2a and the inner ring 2b. It is constituted by a ball 2c. The rolling ball bearing 2 is fitted into the recess 1a of the bearing housing 1 and the end surface of the outer ring 2a is fitted into the recess 1a from the opening end surface 1b of the recess 1a by the housing depth L. Yes. The rolling ball bearing 2 supports the rotating shaft 3 rotatably by an inner ring 2b. φ represents the outer diameter of the rolling ball bearing 2. The rotating shaft 3 supports the rotor of the motor and is driven to rotate by a rotating magnetic field generated between the rotating shaft 3 and the stator.

4はカシメパンチを示し、図2および図3に示すように、軸受ハウジング1の凹部1aの近傍m(mは約0.2mm)の開口端面1bの所謂、肩部に刃先を合わせてハウジング深さLに対して押し込み量dでカシメパンチ4を押し込む。カシメパンチ4の刃先角度は、凹部1a側がn(nは約0.3mm)の幅で、角度θ(θ=45°〜50°)に形成され、軸受ハウジング1の外周側がp(p=0.1〜0.15mm)の幅で、角度α(α=15〜30°)に形成されている。   Reference numeral 4 denotes a caulking punch. As shown in FIGS. 2 and 3, the depth of the housing is adjusted by aligning the blade edge with the so-called shoulder of the open end face 1b in the vicinity of the recess 1a (m is about 0.2 mm) of the bearing housing 1. The caulking punch 4 is pushed into the L with a pushing amount d. The edge angle of the caulking punch 4 is such that the recess 1a side has a width of n (n is about 0.3 mm) and is formed at an angle θ (θ = 45 ° to 50 °), and the outer peripheral side of the bearing housing 1 is p (p = 0.0 mm). 1 to 0.15 mm) and an angle α (α = 15 to 30 °).

そして、カシメ加工に際しては、芯出し冶具5で軸受ハウジング1を位置決めして、軸受ハウジング1の凹部1aに軸受2を挿入してカシメパンチ4で軸受ハウジング1の肩部を軸受ハウジング1の内径との同軸度を高めた状態で、円周同時にカシメ加工を行う。カシメ加工は、図4(a)のように円周同時にカシメ加工を行う場合の他、図4(b)のように回転対称に4分割にカシメ加工を行ってもよく、あるいは、図4(c)のように回転対称に3分割にカシメ加工を行ってもよい。
上記の本加工により、図1(B2)(B3)に示す塑性加工部及び内径収縮部1eが生成され、軸受2のスラスト方向の抜け止めおよび回転止めを図る。図中のL寸法を調整することで、塑性加工の結果得られる機能を図1(A3)〜図1(C3)のように変化させることができる。図1(B2)に示す塑性加工部1eを形成するには、(A)軸受ハウジング1のハウジング母材、(B)ハウジング深さLの寸法、(C)カシメパンチ刃先角θ寸法、(D)転がり玉軸受2の外径φ寸法、(E)押し込み量d寸法を適切に選択する。
When the caulking process is performed, the bearing housing 1 is positioned by the centering jig 5, the bearing 2 is inserted into the recess 1 a of the bearing housing 1, and the shoulder of the bearing housing 1 is connected to the inner diameter of the bearing housing 1 by the caulking punch 4. Caulking is performed at the same time on the circumference with increased coaxiality. As shown in FIG. 4A, the caulking process may be performed in four parts in a rotationally symmetrical manner as shown in FIG. As shown in c), the caulking process may be performed in three rotations symmetrically.
By the main processing described above, the plastic processing portion and the inner diameter contraction portion 1e shown in FIGS. 1B2 and 1B3 are generated, and the bearing 2 is prevented from coming off and rotating in the thrust direction. By adjusting the L dimension in the figure, the function obtained as a result of plastic working can be changed as shown in FIGS. 1 (A3) to 1 (C3). In order to form the plastic working portion 1e shown in FIG. 1 (B2), (A) the housing base material of the bearing housing 1, (B) the dimension of the housing depth L, (C) the caulking punch cutting edge angle θ dimension, (D) The outer diameter φ dimension of the rolling ball bearing 2 and (E) the push-in amount d dimension are appropriately selected.

上記のように(A)軸受ハウジング1のハウジング母材、(B)ハウジング深さLの寸法、(C)カシメパンチ刃先角θ寸法、(D)転がり玉軸受2の外径φ寸法、(E)押し込み量d寸法を調整することで、図1(B2)の固定状態を作り出すことができる。そして、本願固定状態の独創的な作用は、「軸受2をスラスト方向にガタ無く固定することができる。」、「カシメ加工位置の0.2〜0.3mm下方に塑性加工部(又は内径収縮部)1eが形成され、組立後に締め代を付与できる」という2つの効果を同時に達成することができることである。   As described above, (A) housing base material of bearing housing 1, (B) housing depth L, (C) caulking punch edge angle θ dimension, (D) outer diameter φ dimension of rolling ball bearing 2, (E) By adjusting the push-in amount d dimension, the fixed state of FIG. 1 (B2) can be created. And, the original action in the fixed state of the present application is “the bearing 2 can be fixed without backlash in the thrust direction.”, “The plastic working portion (or inner diameter shrinkage) 0.2 to 0.3 mm below the caulking position. (Part) 1e is formed, and a tightening allowance can be given after assembling ".

表2は、本発明の軸受の固定構造と表1で示した従来の固定構造とをスラスト固定強度、組立性、軸方向隙間、省スペース性、クリープ対策、コストの面で対比したもので、ほぼ総ての項目において、本発明の固定構造が優れていることが明らかである。 Table 2 compares the bearing fixing structure of the present invention and the conventional fixing structure shown in Table 1 in terms of thrust fixing strength, assemblability, axial clearance, space saving, creep countermeasures, and cost. It is clear that the fixing structure of the present invention is excellent in almost all items.

Figure 0005394799
Figure 0005394799

なお、L寸法を表3のように調整することで、軸受2を固定したい方向や拘束力を図1状態A〜状態Cへと使い分けることが可能となり、さらに、内径収縮部の収縮量や残留応力を、図5(A1)〜(A3)のように押し込み量d寸法の低減、図5(B1)〜(B3)のようにカシメパンチ刃先角θ寸法の鋭角化によって調節することも可能である。
表3はハウジング材料にA6063というアルミ合金を使用した例である。A6063は、押し出し加工性に優れ、耐食性・表面処理性が良好で、種々な形状・型材が製作可能な合金(Al−Mg−Si系)である。
By adjusting the L dimension as shown in Table 3, it is possible to selectively use the direction in which the bearing 2 is to be fixed and the restraining force in the state A to the state C in FIG. It is also possible to adjust the stress by reducing the push-in amount d dimension as shown in FIGS. 5A1 to 5A3, and by making the caulking punch edge angle θ as sharp as shown in FIGS. 5B1 to 5B3. .
Table 3 shows an example in which an aluminum alloy A6063 is used as the housing material. A6063 is an alloy (Al-Mg-Si type) having excellent extrusion processability, good corrosion resistance and surface treatment, and capable of producing various shapes and mold materials.

Figure 0005394799
Figure 0005394799

また、図6は、図1と同一部分は同符号を付して示す本発明の他の実施例で、この場合、玉軸受2の外輪2aに溝2dが形成された溝入り軸受2´を用いたものである。
この実施例では、カシメパンチ4によって塑性加工を行う際に、軸受ハウジング1の塑性加工部1eが溝2d内に入り込んで溝入り軸受2´を固定する方法である。
これにより、より強固に溝入り軸受2´を固定することができる。このように、内径収縮位置や内径収縮応力量を任意にコントロールすることで、軸受の省スペース固定も可能になる。
FIG. 6 shows another embodiment of the present invention in which the same parts as those in FIG. 1 are denoted by the same reference numerals. In this case, a grooved bearing 2 ′ in which a groove 2d is formed in the outer ring 2a of the ball bearing 2 is shown. It is what was used.
In this embodiment, when plastic working is performed by the caulking punch 4, the plastic working portion 1e of the bearing housing 1 enters the groove 2d and fixes the grooved bearing 2 '.
Thereby, grooved bearing 2 'can be fixed more firmly. As described above, by arbitrarily controlling the inner diameter contraction position and the inner diameter contraction stress amount, the bearing can be fixed in a space-saving manner.

上記実施例1,2によれば、軸受の固定にスラスト方向のガタを発生させることが無く、小部品あるいは副資材を用いることなく、安価な軸受の固定方法を提供することができる。
また、軸受ハウジング1が、塑性加工可能な材質で構成されていることから、カシメ加工を容易に行うことができる。
さらに、カシメパンチ4で円周方向に沿って同時にカシメ加工するので、塑性加工部1eによって、軸受を確実に保持することができる。
またさらに、軸受ハウジング1の材質毎に、ハウジング深さ、カシメパンチ断面形状、カシメパンチ押し込み量を設定するので、最適な塑性加工部1eによって、軸受を確実に保持することができる。
また、軸受ハウジング1の凹部1aの開口端部をカシメ加工により内径側にかしめて、前記軸受2の外輪端面を前記軸受ハウジング1の塑性加工部1eによって係止したので、簡単な構成で、確実に軸受2を固定することができる。
According to the first and second embodiments, it is possible to provide an inexpensive bearing fixing method without generating a backlash in the thrust direction for fixing the bearing and without using small parts or auxiliary materials.
Further, since the bearing housing 1 is made of a material that can be plastically processed, the caulking process can be easily performed.
Furthermore, since caulking is simultaneously performed along the circumferential direction by the caulking punch 4, the bearing can be reliably held by the plastic processing portion 1e.
Furthermore, since the housing depth, the caulking punch cross-sectional shape, and the caulking punch push-in amount are set for each material of the bearing housing 1, the bearing can be reliably held by the optimal plastic working portion 1e.
Further, the opening end portion of the recess 1a of the bearing housing 1 is caulked to the inner diameter side, and the outer ring end surface of the bearing 2 is locked by the plastic processing portion 1e of the bearing housing 1. The bearing 2 can be fixed to the base.

なお、本発明は、上記実施の形態のみに限定されるものではなく、例えば、上記実施の形態では、モータ等の回転電機の回転軸を支持する転がり軸受に適用したが、電動アクチュエータのボールネジを支持する転がり軸受の固定にも適用することができるのは、いうまでもない。   The present invention is not limited to the above embodiment. For example, in the above embodiment, the present invention is applied to a rolling bearing that supports a rotating shaft of a rotating electrical machine such as a motor. Needless to say, the present invention can also be applied to fixing of a rolling bearing to be supported.

1 軸受ハウジング
1a 凹部
1e 塑性加工部
2 転がり玉軸受
2a 外輪
2b 内輪
2c ボール
2d 外輪溝
3 回転軸
4 カシメパンチ
5 芯出し冶具
DESCRIPTION OF SYMBOLS 1 Bearing housing 1a Concave part 1e Plastic processing part 2 Rolling ball bearing 2a Outer ring 2b Inner ring 2c Ball 2d Outer ring groove 3 Rotating shaft 4 Caulking punch 5 Centering jig

Claims (2)

電動機の回転軸等を支持する軸受を軸受ハウジング内に固定する方法において、前記軸受を軸受ハウジングの凹部内にすき間ばめするとともに、該軸受ハウジングの凹部の開口端部を軸受の周縁部に沿ってカシメ加工により内径側にかしめて、前記軸受の外輪端面を前記軸受ハウジングの塑性加工部および内径収縮部によって係止し、
前記軸受を保持する軸受ハウジングを、塑性加工可能な材質で構成し、
前記軸受ハウジングの凹部周縁に設けられた肩部を、鋭利な断面を有するカシメパンチで円周方向に沿ってカシメ加工し、
前記軸受ハウジングの材質および外径寸法毎に、ハウジング深さ、カシメパンチ断面形状、カシメパンチ押し込み量の3要素を最適化する事により塑性加工部を形成したことを特徴とする軸受の固定方法。
A method for securing a bearing for supporting the rotation shaft of the electric machine or the like into the bearing housing, as well as clearance fit the bearing in the recess of the bearing housing, along the open end of the recess of the bearing housing to the periphery of the bearing And caulking to the inner diameter side, and the outer ring end surface of the bearing is locked by the plastic processing portion and the inner diameter contraction portion of the bearing housing,
The bearing housing that holds the bearing is made of a material that can be plastically processed,
The shoulder provided at the periphery of the concave portion of the bearing housing is crimped along the circumferential direction with a caulking punch having a sharp cross section,
A method for fixing a bearing, characterized in that a plastic working portion is formed by optimizing three elements of housing depth, caulking punch cross-sectional shape, and caulking punch pushing amount for each material and outer diameter of the bearing housing.
電動機の回転軸等を支持する軸受を軸受ハウジング内に固定する方法において、前記軸受を軸受ハウジングの凹部内にすき間ばめするとともに、該軸受ハウジングの凹部の開口端部を軸受の周縁部に沿ってカシメ加工により内径側にかしめて、前記軸受の外輪端面を前記軸受ハウジングの塑性加工部および内径収縮部によって係止し、
前記軸受を保持する軸受ハウジングを、塑性加工可能な材質で構成し、
前記軸受ハウジングの凹部より約0.2mmの周縁に設けられた肩部を、刃先角度を、軸受ハウジングの凹部側は、45°〜50°に形成され、軸受ハウジングの外周側は、15〜30°の鋭利な断面を有するカシメパンチで円周方向に沿ってカシメ加工し、
前記軸受ハウジングの材質および外径寸法毎に、ハウジング深さ、カシメパンチ断面形状、カシメパンチ押し込み量の3要素を最適化する事により塑性加工部を形成したことを特徴とする軸受の固定方法。
A method for securing a bearing for supporting the rotation shaft of the electric machine or the like into the bearing housing, as well as clearance fit the bearing in the recess of the bearing housing, along the open end of the recess of the bearing housing to the periphery of the bearing And caulking to the inner diameter side, and the outer ring end surface of the bearing is locked by the plastic processing portion and the inner diameter contraction portion of the bearing housing,
The bearing housing that holds the bearing is made of a material that can be plastically processed,
The shoulder provided at the peripheral edge of about 0.2 mm from the concave portion of the bearing housing is formed to have a cutting edge angle, the concave side of the bearing housing is 45 ° to 50 °, and the outer peripheral side of the bearing housing is 15 to 30 °. Caulking along the circumferential direction with a caulking punch with a sharp cross section of ° ,
A method for fixing a bearing, characterized in that a plastic working portion is formed by optimizing three elements of housing depth, caulking punch cross-sectional shape, and caulking punch pushing amount for each material and outer diameter of the bearing housing.
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