JP2548101B2 - Small press bearing and its manufacturing method - Google Patents
Small press bearing and its manufacturing methodInfo
- Publication number
- JP2548101B2 JP2548101B2 JP3542394A JP3542394A JP2548101B2 JP 2548101 B2 JP2548101 B2 JP 2548101B2 JP 3542394 A JP3542394 A JP 3542394A JP 3542394 A JP3542394 A JP 3542394A JP 2548101 B2 JP2548101 B2 JP 2548101B2
- Authority
- JP
- Japan
- Prior art keywords
- ball
- bearing
- peripheral surface
- axial direction
- outer ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- 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
- F16C33/588—Races of sheet metal
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Forging (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、外周面に複数のボール
を支承する凹部を形成した内輪と、前記凹部に嵌まった
各ボールを脱落不可能に保持するボール保持部を内周面
に設けた外輪とを有する小形プレスベアリングとその製
造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has an inner ring having an inner peripheral surface formed with a concave portion for supporting a plurality of balls and a ball holding portion for holding each ball fitted in the concave portion so as not to fall off. The present invention relates to a small press bearing having a provided outer ring and a manufacturing method thereof.
【0002】[0002]
【従来の技術】ミニチュアベアリングは外径9mm以下
のものを指し、小径ベアリングは外径9mm以上、内径
10mm以下のものを指称する。これらのように小形の
ベアリングはコストが高く、使用部位によっては品質過
剰となり、それを避けるために滑り軸受の使用を余儀な
くされることも多々あった。しかし滑り軸受と転がり軸
受とでは抵抗等回転性能に大差があり、特にトルク損失
が問題である。モータの小型化が進行するにつれてトル
ク損失は見逃せない問題となっている。2. Description of the Related Art Miniature bearings have an outer diameter of 9 mm or less, and small diameter bearings have an outer diameter of 9 mm or more and an inner diameter of 10 mm or less. Small bearings such as these are expensive, and depending on the part to be used, the quality is excessive, and in order to avoid it, sliding bearings were often used. However, there is a great difference in rotational performance such as resistance between the sliding bearing and the rolling bearing, and the torque loss is a particular problem. Torque loss has become an issue that cannot be overlooked as motors become smaller.
【0003】ミニチュアベアリングや小径ベアリングの
コストが高いことは、従来のそれらが精密な寸法管理の
しやすい切削加工によって製作された部品を使用してい
ることに一因がある。これに対し構成部品をプレス加工
によって製作すれば、コストを下げ得る可能性がある。
しかし従来のプレスベアリングはボールに接し、かつベ
アリング軸方向の一方へのボールの移動を止める部材
と、他の一方へのボールの移動を止める部材と、それら
を一体に組み合わせる部材との3部材が必要であった。
これらの部材をボールの両側からかしめ加工し或いは外
方から内方へかしめて最終的に1個のベアリングが完成
するのである。しかし、複数個の部材を加工しつつ、1
個のベアリングに組み合わせるためには誤差が増巾され
ないように高い精度で、慎重に加工することが要求され
る。このためコスト面で有利な筈のプレス加工品も小形
プレス化することにより却って高くなるおそれがある。
このようなことが原因して、プレスによるミニチュアベ
アリングは未だ提供されていない。The high cost of miniature bearings and small diameter bearings is partly due to the fact that they are traditionally made from cut parts that are easy to precisely dimension. On the other hand, if the components are manufactured by pressing, the cost may be reduced.
However, the conventional press bearing has three members, a member that contacts the ball and that stops the movement of the ball in one direction of the bearing axis, a member that stops the movement of the ball in the other direction, and a member that combines them. Was needed.
These members are caulked from both sides of the ball or caulked from the outside to the inside to finally complete one bearing. However, while processing multiple members,
In order to combine the bearings with each other, it is necessary to carefully process them with high precision so that the error is not increased. For this reason, a pressed product that should be advantageous in terms of cost may be rather expensive by making a small press.
Due to this, miniature bearings by press have not yet been offered.
【0004】[0004]
【発明が解決しようとする課題】本発明は前記の実情に
鑑みなされたもので、その課題とするところはミニチュ
アベアリングと小径ベアリングを含む小形ベアリングを
プレス加工品を用いて量産する技術を確立することにあ
る。また本発明は、プレス加工により、廉価でありしか
も回転抵抗が小さく小型モータ類に適した小形プレスベ
アリングを提供することをその目的とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and its object is to establish a technique for mass-producing small bearings including a miniature bearing and a small diameter bearing by using a press work product. Especially. It is another object of the present invention to provide a compact press bearing suitable for small motors, which is inexpensive and has a small rotational resistance by press working.
【0005】[0005]
【課題を解決するための手段】前記課題を解決するため
本発明は、ミニチュアベアリングや小径ベアリングなど
の小形のプレスベアリングについて、各ボールに対して
ベアリングの半径方向外方から接触可能であり、かつベ
アリング軸方向の一方へのボールの移動を防止するため
に半径方向内方へ突出した突部を有する接触部と、該接
触部における前記軸方向の他の一方から半径方向内方へ
向かい、内輪の外周との間に小間隙を残して終わる内方
端部とを単一の部材からなる外輪に形成するという手段
を講じたものである。In order to solve the above problems, the present invention relates to a small press bearing such as a miniature bearing or a small diameter bearing, which is capable of contacting each ball from the outside in the radial direction of the bearing, and A contact part having a protrusion projecting inward in the radial direction to prevent the ball from moving in one axial direction of the bearing, and a radial direction inward from the other one in the axial direction of the contact part, and an inner ring. A means for forming an outer end made of a single member with an inner end portion that ends with a small gap between the outer ring and the outer periphery is taken.
【0006】そしてこのような小形プレスベアリングは
外輪を単一の部材によって形成するために金属製の薄板
をドーナツ状に打ち抜き、そのドーナツ型の外周縁がベ
アリング軸方向の一方の端部を構成するとともに、ドー
ナツ型の内周縁が同じく他の一方の端部を構成するよう
に薄板を筒状にプレス成形し、凹部に全ボールを嵌めた
状態で内輪を前記筒状の中間成形品内にセットし、前記
一方の端部近くにて直径を絞り、半径方向内方へ突出さ
せることにより、全ボールを相手成形型としてベアリン
グ軸方向の一方へのボールの移動を防止するための突部
を有する接触部を成形し、該接触部における前記軸方向
の他の一方から半径方向内方へ向かい、内輪の外周との
間に小間隙を残して終わる内方端部とを中間成形品の軸
方向の他の一方の端部に成形するという方法によって製
造するのが望ましい。In such a compact press bearing, a thin metal plate is punched into a donut shape in order to form the outer ring by a single member, and the outer peripheral edge of the donut shape constitutes one end portion in the bearing axial direction. At the same time, a thin plate is press-molded into a tubular shape so that the inner edge of the donut shape constitutes the other end, and the inner ring is set in the tubular intermediate molded product with all the balls fitted in the recesses. However, by reducing the diameter near one of the one ends and projecting it inward in the radial direction, all balls are used as mating molds and have projections for preventing the balls from moving in one direction in the bearing axial direction. The contact portion is molded, and the inner end portion that extends radially inward from the other axial direction of the contact portion and ends with leaving a small gap with the outer periphery of the inner ring is formed in the axial direction of the intermediate molded product. One of the other It is desirable to manufacture by the process of molding the part.
【0007】[0007]
【実施例】図1は内輪10と外輪20及びそれらの間に
殆ど隙間なく組み込まれたボール11とからなる、所謂
総ボール型の小形プレスベアリングを軸方向から見た正
面図である。内輪10は例えば図示の如く単一の短い筒
状部材からなり、その外周面の用方向に多数のボール1
1を支承する凹部12が1条形成されている。この内輪
10とボール11とは従来のものと同様で良い。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view of a so-called full-ball type small press bearing, which is composed of an inner ring 10 and an outer ring 20 and balls 11 installed between them with almost no gap, as viewed from the axial direction. The inner ring 10 is made of, for example, a single short tubular member as shown in the drawing, and a large number of balls 1 are formed in the outer peripheral surface of the inner ring 10.
A single recess 12 is formed to support 1. The inner ring 10 and the ball 11 may be the same as conventional ones.
【0008】外輪20は単一の部材からなり、この点に
本発明の特徴がある。The outer ring 20 is composed of a single member, and this is a feature of the present invention.
【0009】外輪20の第1の例は図2(a)に示され
ている。第1の例の外輪20はその内周面がベアリング
の半径方向外方から各ボール11に接触可能であり、か
つベアリング軸方向の一方へのボール11の移動を防止
するために半径方向内方へ突出した突部21を有する接
触部22と、内輪10の外周との間に小間隙23を残し
て終る内方端部24とを有している。A first example of the outer ring 20 is shown in FIG. 2 (a). The outer ring 20 of the first example has an inner peripheral surface capable of contacting each ball 11 from the outside in the radial direction of the bearing, and inward in the radial direction in order to prevent the ball 11 from moving in one axial direction of the bearing. It has a contact portion 22 having a protruding portion 21 protruding inward, and an inner end portion 24 that ends with leaving a small gap 23 between the outer periphery of the inner ring 10.
【0010】接触部22は半径方向外方における内周面
である円周面22aと、突部21の内側の一部分である
傾斜状の傾斜周面22bとからなる(一つの曲面接触部
22でも良い。)。また内方端部24は先端部24aが
内輪外周面とほぼ平行な方向に曲げ成形されている。こ
のためボール11に対する一方の抜け止めを接触部22
が行ない、他の一方の抜け止めは上記先端部24aが担
当する。小間隙23は異物の侵入を防止する。また符号
25はフランジであり、外輪20の軸方向の一方の端部
から半径方向外方へ突出するが、その程度や有無は任意
に設定できる。The contact portion 22 is composed of a circumferential surface 22a, which is an inner circumferential surface outward in the radial direction, and an inclined peripheral surface 22b, which is a part of the inner side of the protrusion 21 (even with one curved surface contact portion 22). good.). Further, the inner end portion 24 is formed by bending the tip portion 24a in a direction substantially parallel to the outer peripheral surface of the inner ring. For this reason, one stopper for the ball 11 is used as the contact portion 22.
The above-mentioned tip portion 24a takes charge of preventing the other one from coming off. The small gap 23 prevents foreign matter from entering. Further, reference numeral 25 is a flange, which projects outward in the radial direction from one end of the outer ring 20 in the axial direction, but the extent and presence thereof can be set arbitrarily.
【0011】この第1の例の小形プレスベアリングは図
3に示す方法によって製造することができる。この方法
は外輪20をプレス成形により単一の部材として製作す
ることを可能にする。The small press bearing of the first example can be manufactured by the method shown in FIG. This method allows the outer ring 20 to be manufactured as a single member by press molding.
【0012】図3に示すように、外輪に適した金属製の
薄板Mは予めドーナツ状に打ち抜かれており、それを外
周縁がベアリング軸方向の一方の端部を構成し、内周面
は同じく他の一方の端部のU字型を構成するように筒状
にプレス成形し、中間成形品M′にする(図3中段)。
なお、薄板Mは相対的に小さくかつ、薄く図示されてい
る。内方端部24の先端部24aはこのとき成形され
る。次いで凹部12に全部のボール11を嵌めた状態で
内輪10を中間成形品M′の筒内にセットし、続いて中
間成形品M′を回転させながらその一方の端部近くにへ
らSを押しあてその部分で全ボールを相手成形型として
直径を絞り、半径方向内方へ突出させ、ベアリング軸方
向の一方へのボール11の移動を防止するための突部2
1を有する接触部22を形成する。As shown in FIG. 3, a metal thin plate M suitable for an outer ring is punched in a donut shape in advance, and the outer peripheral edge of the thin plate M constitutes one end in the bearing axial direction, and the inner peripheral surface is Similarly, it is press-molded into a cylindrical shape so as to form a U-shape at the other one end portion to form an intermediate molded product M ′ (middle stage in FIG. 3).
The thin plate M is relatively small and shown thin. The front end portion 24a of the inner end portion 24 is molded at this time. Then, the inner ring 10 is set in the cylinder of the intermediate molded product M'with all the balls 11 fitted in the recesses 12, and then the spatula S is pushed near one end while rotating the intermediate molded product M '. A projection 2 for preventing the movement of the ball 11 in one of the bearing axial directions by narrowing the diameter of all the balls by using the mating mold as a mating mold in the hitting portion and projecting it inward in the radial direction.
The contact portion 22 having the number 1 is formed.
【0013】外輪20の第2の例は図2(b)に示され
ている。第2の例の外輪20は接触部22のみでボール
11の脱落を防止する点に特徴がある。そのため第2の
例の接触部22は各ボール11に対して軸方向へ線状に
接触可能な凹部として形成されており、その凹部からな
る接触部22の軸方向の一方に第1の突部21−1を設
け、他の一方に第2の突部21−2を設けたものであ
る。両突部21−2、21−2は円周方向に沿ってお
り、故に第1の例の先端24aは上記第2の突部21−
2が代替しているのでそれに相当する構成は不要であ
る。他の構成は第1の例と同様で良いので符号を援用
し、説明は略す。A second example of the outer ring 20 is shown in FIG. 2 (b). The outer ring 20 of the second example is characterized in that the ball 11 is prevented from falling off only by the contact portion 22. Therefore, the contact portion 22 of the second example is formed as a recessed portion that can linearly contact the respective balls 11 in the axial direction, and the contact portion 22 formed of the recessed portion has the first protrusion on one side in the axial direction. 21-1 is provided, and the second protrusion 21-2 is provided on the other side. Both protrusions 21-2, 21-2 are along the circumferential direction, and therefore the tip 24a of the first example has the above-mentioned second protrusion 21-.
2 is a substitute, so that no corresponding structure is required. Since other configurations may be the same as those in the first example, the reference numerals are used and the description is omitted.
【0014】第2の例の小形プレスベアリングの製造方
法は図4に示してあり、金属薄板Mからなるドーナツ形
をプレス成形することにより一方の端部に半径方向外方
へ突出した第1の例と同じくほぼL字型のフランジ25
を形成し、他の一方には半径方向内方へほぼL字型に突
出した内方端部24を形成する。これは図4中段に示す
中間成形品M′であり、次いでその筒内に第1の例と同
じく凹部12に全部のボール11を嵌めた内輪10をセ
ットし、中間成形品M′の平行な周面に外側から一対の
へらSを押し当て、ボール列を相手成形型としてボール
列の両側に半径方向内方へ突出する第1、第2の突部2
1−1、21−2を成形する。The manufacturing method of the small press bearing of the second example is shown in FIG. 4, and a donut shape made of a thin metal plate M is press-formed to the first end protruding radially outward at one end. Similar to the example, it is an almost L-shaped flange 25
Is formed, and the other end is formed with an inner end portion 24 protruding inward in the radial direction in a substantially L-shape. This is an intermediate molded product M'shown in the middle of FIG. 4. Then, the inner ring 10 in which all the balls 11 are fitted in the recesses 12 is set in the cylinder as in the first example, and the intermediate molded product M'is parallel. First and second protrusions 2 that press a pair of spatulas S from the outside against the circumferential surface and project inward in the radial direction on both sides of the ball row by using the ball row as a mating mold.
Mold 1-1 and 21-2.
【0015】次に外輪20の第3の例を図2(c)に示
す。この例の場合も接触部22の軸方向両側に第1、第
2の突部21−1、21−2を有する点第2の例と共通
する。しかし、第2の突部21−2は円径が絞られたま
ま内方端部24に連続しており、内方端部24の側でよ
り小型化される点で第2の例のものと相違している。他
の構成は第1、或いは第2の例と同様で良いので図2
(c)に符号を援用し、説明を省略する。Next, a third example of the outer ring 20 is shown in FIG. 2 (c). This example is also common to the second example in that the first and second protrusions 21-1 and 21-2 are provided on both sides of the contact portion 22 in the axial direction. However, the second projecting portion 21-2 is continuous with the inner end portion 24 while the diameter of the circle is reduced, and the second projecting portion 21-2 is smaller in size on the inner end portion 24 side. Is different from Other configurations may be the same as those of the first or second example.
The reference numeral is used for (c), and the description is omitted.
【0016】第3の例の外輪20を製造するには、図5
に示すようにドーナツ形の金属薄板Mをプレス成形し、
ベアリング軸方向の一方の端部25に半径方向外方へ突
出したほぼL字型のフランジ25を形成し、他の一方の
端部を小径の絞り部26とし、その先に第2の例と同様
半径方向内方へほぼL字型に突出した形状の内方端部2
4を形成し、筒状の中間成形品M′とする。その絞り部
26によって内側に形成される段状の部分27が即ち第
2の突部21−2を構成する。故に中間成形品M′のプ
レス段階で第2の突部21−2が形成されるので、その
後内筒10に嵌め合わせた全部のボール11を相手成形
型としてへら加工する箇所は1箇所で良い。つまり最後
の工程ではへらSで第1の突部21−1を成形するだけ
である。To manufacture the outer ring 20 of the third example, refer to FIG.
As shown in, a donut-shaped thin metal plate M is press-molded,
A substantially L-shaped flange 25 protruding outward in the radial direction is formed at one end 25 in the axial direction of the bearing, and the other end is used as a small-diameter throttle portion 26. Similarly, the inner end portion 2 has a shape that projects inward in the radial direction in a substantially L-shape.
4 is formed into a cylindrical intermediate molded product M '. The stepped portion 27 formed on the inner side by the narrowed portion 26 constitutes the second protrusion 21-2. Therefore, since the second protrusion 21-2 is formed in the pressing step of the intermediate molded product M ', only one place is required to spatulate all the balls 11 fitted in the inner cylinder 10 as a mating mold thereafter. . That is, in the last step, the spatula S only forms the first protrusion 21-1.
【0017】以上の3タイプの小形プレスベアリングは
いずれも総ボール型であるので、次に第4乃至第6の実
施例としてリテーナ付きの小形プレスベアリングを示
す。Since the above-mentioned three types of compact press bearings are all ball type, a compact press bearing with a retainer will be shown as the fourth to sixth embodiments.
【0018】第4の例は第1の例と同じ形状、構造を有
する外輪20を使用するものである。内輪10と外輪2
0の形状、構造は第1の例に説明されており、従って第
4例はそれらの部材間に必要な間隔を保ってボール11
を支えるリテーナ30を設けたものと考えて良い。The fourth example uses an outer ring 20 having the same shape and structure as the first example. Inner ring 10 and outer ring 2
The shape and structure of 0 is described in the first example, and therefore the fourth example provides balls 11 with the necessary spacing between their members.
It may be considered that the retainer 30 for supporting the is provided.
【0019】故に外輪20はベアリング軸方向一方にお
いて半径方向内方ヘ突出する突部21を有し、また他の
一方において軸方向へほぼU字形に突出する内方端部2
4を有し、その先端24aと前記突部21との間でボー
ル11の脱落を防止する。リテーナ30はボール11を
保持するための凹部31を有するリング状の部材であ
り、リング状の連続部分32は、前記一方の突部21と
内輪外周面との間の大間隙28に配置される。Therefore, the outer ring 20 has a projection 21 that projects radially inward on one side in the bearing axial direction, and the inner end 2 that projects substantially U-shaped axially on the other side.
4 to prevent the ball 11 from falling off between the tip 24a and the protrusion 21. The retainer 30 is a ring-shaped member having a recess 31 for holding the ball 11, and the ring-shaped continuous portion 32 is arranged in a large gap 28 between the one projection 21 and the outer peripheral surface of the inner ring. .
【0020】第4の例の小形プレスベアリングは図8に
示す工程に従って製造される。図8においてドーナツ形
の金属薄板Mから筒状の中間成形品M′を成形するには
外周縁がベアリング軸方向の一方の端部を構成し、内周
面は同じく他の一方の端部のU型を構成するように筒状
にプレス成形する(図8左中段)。次いで該中間成形品
M′の中に相手成形型40であるコレットチャックをセ
ットし、その凹状の型面41に向けてへらSを押し当
て、回転させながら直径を絞り、半径方向内方へ突出し
た突部21を成形する。The small press bearing of the fourth example is manufactured according to the process shown in FIG. In FIG. 8, in order to form a tubular intermediate molded product M ′ from a donut-shaped thin metal plate M, the outer peripheral edge constitutes one end portion in the bearing axial direction, and the inner peripheral surface similarly forms the other end portion. It is press-molded into a cylindrical shape so as to form a U shape (FIG. 8, middle left). Next, a collet chuck, which is the mating mold 40, is set in the intermediate molded product M ', the spatula S is pressed against the concave mold surface 41, the diameter is reduced while rotating, and it projects radially inward. The protruding portion 21 is formed.
【0021】このように成形された外輪20の中へ内輪
10をボール11とともに組み込み(図8右中段)、各
ボール11を所定の位置に分散させながら大間隙28よ
りリテーナ30を嵌め込み、その凹部31に各ボール1
1が収まるようにする(図8右下段)。外輪20内へ内
輪10とボール11及びリテーナ30を組む込む、以上
の方法は従来行なわれている方法である。The inner ring 10 is assembled together with the balls 11 into the outer ring 20 formed in this way (the middle part of the right side of FIG. 8), the retainers 30 are fitted into the large gaps 28 while the balls 11 are dispersed at predetermined positions, and the recesses are formed. 31 for each ball
Make sure that 1 fits in (lower right of Fig. 8). The above method of incorporating the inner ring 10, the ball 11 and the retainer 30 into the outer ring 20 is a conventional method.
【0022】第5の例の小形プレスベアリングに使用す
る外輪20は図7(b)に示されており、これは第2の
例における外輪20と同じ形状、構造を有している。そ
こで外輪20の形状、構造については図2(b)に示
し、かつ第2の例の外輪20について既述した内容を参
照することとし、相違点のみを述べると、この例の特徴
は第2の例の外輪20を用いて大間隙28にリテーナ3
0を配置した構成を有する小形プレスベアリングである
点である。The outer ring 20 used for the small press bearing of the fifth example is shown in FIG. 7B, which has the same shape and structure as the outer ring 20 of the second example. Therefore, the shape and structure of the outer ring 20 are shown in FIG. 2B, and the contents already described for the outer ring 20 of the second example will be referred to. Only the differences will be described. Of the retainer 3 to the large gap 28 using the outer ring 20 of
This is a small press bearing having a configuration in which 0s are arranged.
【0023】その製造方法は図9に示されており、主要
部は図4に示した例と共通するが、総ボール型ではない
ので中間成形品M′を加工する相手成形型40として第
4例のようにコレットチャックを使用する。このコレッ
トチャックの外周面には二つの凹状の型面42、43が
設けてある。両型面42、43の間隔はボール11を押
えるのに適した間隔であり、第2の例の第1、第2の突
部21−1、21−2のそれと同じである。次に第4の
例と同じく、完成した外輪20内にボール11を片寄せ
ながら内輪10を嵌め込み、その後ボール11を分散さ
せながらリテーナ30により保持させる。The manufacturing method is shown in FIG. 9, and although the main part is common to the example shown in FIG. 4, since it is not a full ball type, it is the fourth as a mating mold 40 for processing the intermediate molded product M ′. Use a collet chuck as in the example. Two concave mold surfaces 42 and 43 are provided on the outer peripheral surface of the collet chuck. The distance between the mold surfaces 42, 43 is suitable for pressing the ball 11, and is the same as that of the first and second protrusions 21-1, 21-2 of the second example. Next, as in the fourth example, the inner ring 10 is fitted into the completed outer ring 20 while the balls 11 are being offset, and then the balls 11 are held by the retainer 30 while being dispersed.
【0024】図7(c)に示された第6の例は前記第3
り例の外輪20を用いてリテーナ付きの小形プレスベア
リングを構成した例であり、故に外輪20の形状、構造
は第3の例の場合と同じで良いので符号を援用し説明を
省略する。この例6の場合も突部21−1を成形するた
めにコレットチャックからなる相手成形型40を使用す
るが、図2(c)或いは図5で説明したのと同様に、第
2の突部21−2はドーナツ状金属薄板Mをプレス成形
して中間成形品M′を成形するときに、小径の絞り部2
6によって内側に形成される(図10左、中段)。The sixth example shown in FIG. 7C is the third example.
This is an example in which a small press bearing with a retainer is configured using the outer ring 20 of the above example. Therefore, the shape and structure of the outer ring 20 may be the same as in the case of the third example, so the reference numerals are used and the description thereof is omitted. In the case of this Example 6 as well, the mating mold 40 made of a collet chuck is used to mold the protrusion 21-1, but the second protrusion is the same as described in FIG. 2C or FIG. Reference numeral 21-2 denotes a small-diameter drawing portion 2 when press-molding a donut-shaped thin metal plate M to form an intermediate molded product M ′.
It is formed inside by 6 (FIG. 10, left, middle stage).
【0025】このように本発明に係る小形プレスベアリ
ングは外輪20を単一の部材によって形成し、各ボール
11に対して半径方向外方から接触可能な接触部22を
凹状に形成してあるので、軸方向へのボール11の移動
を接触部22の突部21、21−1と内方端部24側の
突部21−2、及び先端部24aで止めることができ
る。外輪20はプレス成形によって製作することができ
るので、製造速度が早く、しかも単一の部品からなるか
ら精度も出し易い。As described above, in the compact press bearing according to the present invention, the outer ring 20 is formed by a single member, and the contact portion 22 that can contact each ball 11 from the outside in the radial direction is formed in a concave shape. The movement of the ball 11 in the axial direction can be stopped by the protrusions 21 and 21-1 of the contact portion 22, the protrusion 21-2 on the inner end portion 24 side, and the tip portion 24a. Since the outer ring 20 can be manufactured by press molding, the manufacturing speed is high, and the accuracy is easy to obtain because it is made of a single component.
【0026】[0026]
【発明の効果】本発明は以上の如く構成されかつ作用す
るものであるから、小形プレスベアリングや小径ベアリ
ングを含む小形ベアリングをプレス加工によって量産す
る技術を確立することができた。しかもボールベアリン
グであるから回転抵抗が小さく小型機器等に適した小形
プレスベアリングを廉価に提供することができるという
効果を奏する。Since the present invention is constructed and operates as described above, it has been possible to establish a technique for mass-producing small bearings including a small press bearing and a small diameter bearing by press working. Moreover, since it is a ball bearing, there is an effect that it is possible to provide a small-sized press bearing, which has a small rotational resistance and is suitable for a small device, at a low price.
【図1】本発明に係る総ボール型の小形プレスベアリン
グの実施例を示す正面図。FIG. 1 is a front view showing an embodiment of a full ball type small press bearing according to the present invention.
【図2】(a)同上の第1の例の拡大断面図。 (b)同上の第2の例の拡大断面図。 (c)同上の第3の例の拡大断面図。FIG. 2A is an enlarged cross-sectional view of the first example of the above. (B) The expanded sectional view of the 2nd example same as the above. (C) The expanded sectional view of the 3rd example same as the above.
【図3】第1の例の製造工程図。FIG. 3 is a manufacturing process diagram of the first example.
【図4】第2の例の製造工程図。FIG. 4 is a manufacturing process diagram of a second example.
【図5】第3の例の製造工程図。FIG. 5 is a manufacturing process diagram of a third example.
【図6】本発明に係るリテーナ型小形プレスベアリング
の実施例を示す正面図。FIG. 6 is a front view showing an embodiment of a retainer type small press bearing according to the present invention.
【図7】(a)同上の第4の例の拡大断面図。 (b)同上の第5の例の拡大断面図。 (c)同上の第6の例の拡大断面図。FIG. 7A is an enlarged sectional view of a fourth example of the same. (B) The expanded sectional view of the 5th example same as the above. (C) The expanded sectional view of the 6th example same as the above.
【図8】第4の例の製造工程図。FIG. 8 is a manufacturing process drawing of the fourth example.
【図9】第5の例の製造工程図。FIG. 9 is a manufacturing process drawing of the fifth example.
【図10】第6の例の製造工程図。FIG. 10 is a manufacturing process diagram of a sixth example.
Claims (7)
形成した内輪と、前記凹部に嵌まった各ボールを脱落不
可能に保持するボール保持部を内周面に設けた外輪とを
有する小形プレスベアリングであって、各ボールに対し
てベアリングの半径方向外方から接触可能であり、かつ
ベアリング軸方向の一方へのボールの移動を防止するた
めに半径方向内方へ突出した突部を有する接触部と、該
接触部における前記軸方向の他の一方から半径方向内方
へ向かい、内輪の外周との間に小間隙を残して終わる内
方端部とを単一の部材からなる外輪に形成したことを特
徴とする小形プレスベアリング。1. An inner ring having a recess formed on the outer peripheral surface for supporting a plurality of balls, and an outer ring having a ball holding portion on the inner peripheral surface for holding each ball fitted in the recess irremovably. It is a compact press bearing that can contact each ball from the outside in the radial direction of the bearing, and has a protrusion that protrudes inward in the radial direction to prevent the ball from moving in one direction of the bearing axial direction. An outer ring composed of a single member, having a contact portion and an inner end portion that extends radially inward from the other axial direction of the contact portion and ends with a small gap between the contact portion and the outer periphery of the inner ring. A small press bearing characterized by being formed in.
形成した内輪と、前記凹部に嵌まった各ボールを脱落不
可能に保持するボール保持部を内周面に設けた外輪と、
前記各ボールを所定の間隔を保って保持するリテーナと
を有する小形プレスベアリングであって、各ボールに対
してベアリングの半径方向外方から接触可能であり、か
つベアリング軸方向の一方へのボールの移動を防止する
ために半径方向内方へ突出した突部を有する接触部と、
該接触部における前記軸方向の他の一方から半径方向内
方へ向かい、内輪の外周との間に小間隙を残して終わる
内方端部とを単一の部材からなる外輪に形成し、前記軸
方向の一方の突部と内輪外周面との間との大間隙にリテ
ーナを配置したことを特徴とする小形プレスベアリン
グ。2. An inner ring having a recess formed on the outer peripheral surface for supporting a plurality of balls, and an outer ring having a ball holding portion on the inner peripheral surface for holding each ball fitted in the recess irremovably.
A small press bearing having a retainer for holding each ball at a predetermined interval, the ball being capable of contacting each ball from the outside in the radial direction of the bearing, and the ball in one of the bearing axial directions. A contact portion having a protrusion protruding inward in the radial direction to prevent movement,
The outer ring made of a single member is formed with an inner end portion that extends inward in the radial direction from the other one of the axial directions in the contact portion and ends with a small gap from the outer periphery of the inner ring, A small press bearing characterized in that a retainer is arranged in a large gap between one projection in the axial direction and the outer peripheral surface of the inner ring.
する円周面と、突部の内側に位置する傾斜周面とからな
り、また内方端部はその先端が軸方向の他の一方からボ
ールへ接触可能に軸方向内方へ突出している請求項第1
項又は第2項記載の小形プレスベアリング。3. The contact portion is composed of a circumferential surface located on the inner surface of the outer ring radially outward and an inclined peripheral surface located on the inner side of the protrusion, and the inner end portion has a tip which is axially different from the other. A first inward projecting portion is axially inwardly contactable with the ball.
The compact press bearing according to item 2 or 3.
能な凹部として形成されており、その凹部接触部の端の
軸方向の一方を第1の突部とし、また同接触部における
軸方向の他の一方を第2の突部とし、両突部によりボー
ルの脱落を防止する構成を備えた請求項第1項又は第2
項記載の小形プレスベアリング。4. The contact portion is formed as a concave portion capable of linearly contacting each ball, and one of the ends of the concave portion contacting portion in the axial direction serves as a first protruding portion, and the contact portion has the same shape. 3. The structure according to claim 1, wherein the other one of the axial directions is a second protrusion, and the protrusions prevent the balls from falling off.
Compact press bearing described in paragraph.
形成した内輪と、前記凹部に嵌まった各ボールを脱落不
可能に保持するボール保持部を内周面に設けた外輪とを
有する小形プレスベアリングの製造方法であって、外輪
を単一の部材によって形成するために金属製の薄板をド
ーナツ状に打ち抜き、そのドーナツ型の外周縁がベアリ
ング軸方向の一方の端部を構成するとともに、ドーナツ
型の内周縁が同じく他の一方の端部を構成するように薄
板を筒状にプレス成形し、凹部に全ボールを嵌めた状態
で内輪を前記筒状の中間成形品内にセットし、前記一方
の端部近くにて直径を絞り、半径方向内方へ突出させる
ことにより、全ボールを相手成形型としてベアリング軸
方向の一方へのボールの移動を防止するための突部を有
する接触部を成形し、該接触部における前記軸方向の他
の一方から半径方向内方へ向かい、内輪の外周との間に
小間隙を残して終わる内方端部とを中間成形品の軸方向
の他の一方の端部に成形したことを特徴とする小形プレ
スベアリングの製造方法。5. An inner ring having a recess formed on the outer peripheral surface for supporting a plurality of balls, and an outer ring having a ball holding portion for retaining each ball fitted in the recess irremovably on the inner peripheral surface. A method for manufacturing a compact press bearing, wherein a thin metal plate is punched into a donut shape to form an outer ring with a single member, and the outer peripheral edge of the donut shape constitutes one end in the bearing axial direction. , A thin plate is press-molded into a tubular shape so that the inner edge of the donut shape constitutes the other end, and the inner ring is set in the tubular intermediate molded product with all the balls fitted in the recesses. , A contact having a projection for preventing the balls from moving in one axial direction of the bearing by using all balls as a mating mold by reducing the diameter near one end and projecting inward in the radial direction. Molding the part A radial direction inward from the other axial direction of the contact portion, and an inner end portion that ends with a small gap between the inner ring and the outer circumference of the inner ring, A method for manufacturing a small press bearing, characterized by being molded at the end.
形成した内輪と、前記凹部に嵌まった各ボールを脱落不
可能に保持するボール保持部を内周面に設けた外輪と、
前記各ボールを所定の間隔を保って保持するリテーナと
を有する小形プレスベアリングの製造方法であって、外
輪を単一の部材によって形成するために金属製の薄板を
ドーナツ状に打ち抜き、そのドーナツ型の外周縁がベア
リング軸方向の一方端部を構成するとともに、ドーナツ
型の内周縁が同じく他の一方の端部を構成するように筒
状にプレス成形し、該筒状の中間成形品の内周面に相手
成形型をセットすることにより中間成形品の直径を絞
り、半径方向内方へ突出して軸方向の一方へのボールの
移動を防止するための突部を有する接触部を成形し、か
つ該接触部における前記軸方向の他の一方から半径方向
内方へ向かい、内輪の外周との間に小間隙を残して終わ
る内方端部を中間成形品の軸方向の他の一方の端部に成
形することによって外輪を成形し、その外輪内に内輪を
ボールとともに組み込み最後にリテーナを取り付けるよ
うにしたことを特徴とする小形プレスベアリングの製造
方法。6. An inner ring having a recess formed on the outer peripheral surface for supporting a plurality of balls, and an outer ring having a ball holding portion on the inner peripheral surface for holding each ball fitted in the recess irremovably.
A method for manufacturing a small press bearing having a retainer for holding each ball at a predetermined interval, wherein a thin metal plate is punched into a donut shape to form the outer ring by a single member, and the donut shape is formed. Of the doughnut-shaped inner peripheral edge constitutes one end portion in the axial direction of the bearing, and the inner peripheral edge portion of the donut shape also constitutes the other one end portion thereof. By setting the mating mold on the peripheral surface, the diameter of the intermediate molded product is reduced, and a contact part is formed that protrudes inward in the radial direction and has a projection for preventing the ball from moving in one axial direction. Further, the inner end portion of the contact portion, which is directed radially inward from the other axial direction end and ends with leaving a small gap between the inner ring and the outer periphery of the contact portion, is the other axial end portion of the intermediate molded product. By molding into parts Molding the wheel manufacturing method of small press bearings with ball inner ring within the outer ring, characterized in that to attach the retainer to the embedded end.
形成した内輪と、前記凹部に嵌まった各ボールを脱落不
可能に保持するボール保持部を内周面に設けた外輪と、
前記各ボールを所定の間隔を保って保持するリテーナと
を有する小形プレスベアリングの製造方法であって、外
輪を単一の部材によって形成するために金属製の薄板を
ドーナツ状に打ち抜き、そのドーナツ型の外周縁がベア
リング軸方向の一方端部を構成するとともに、ドーナツ
型の内周縁にベアリング軸方向の他の一方へのボールの
移動を防止するための第2の突部を有しかつその内周縁
が他の一方の端部を構成するように筒状にプレス成形
し、該筒状の中間成形品の内周面に相手成形型をセット
することにより中間成形品の外径を絞り、半径方向内方
へ突出して軸方向の一方へのボールの移動を防止するた
めの第1の突部を有する外輪を成形し、その外輪内に内
輪をボールとともに組み込み最後にリテーナを取り付け
るようにしたことを特徴とする小形プレスベアリングの
製造方法。7. An inner ring having a recess formed on the outer peripheral surface for supporting a plurality of balls, and an outer ring having a ball holding portion on the inner peripheral surface for holding each ball fitted in the recess irremovably.
A method for manufacturing a small press bearing having a retainer for holding each ball at a predetermined interval, wherein a thin metal plate is punched into a donut shape to form the outer ring by a single member, and the donut shape is formed. The outer peripheral edge of the donut constitutes one end in the axial direction of the bearing, and the inner peripheral edge of the toroidal shape has a second protrusion for preventing movement of the ball to the other axial direction of the bearing, and The outer diameter of the intermediate molded product is reduced by press-molding in a cylindrical shape so that the peripheral edge constitutes the other end, and by setting a mating mold on the inner peripheral surface of the cylindrical intermediate molded product. An outer ring having a first protrusion for projecting inward in the direction to prevent the ball from moving in one axial direction, and the inner ring is assembled with the ball in the outer ring and the retainer is attached at the end. To Method of manufacturing a small press bearings and butterflies.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3542394A JP2548101B2 (en) | 1994-02-08 | 1994-02-08 | Small press bearing and its manufacturing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3542394A JP2548101B2 (en) | 1994-02-08 | 1994-02-08 | Small press bearing and its manufacturing method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07224840A JPH07224840A (en) | 1995-08-22 |
JP2548101B2 true JP2548101B2 (en) | 1996-10-30 |
Family
ID=12441470
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3542394A Expired - Fee Related JP2548101B2 (en) | 1994-02-08 | 1994-02-08 | Small press bearing and its manufacturing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2548101B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11230177A (en) | 1998-02-10 | 1999-08-27 | Tok Bearing Co Ltd | Small size bearing having flange |
-
1994
- 1994-02-08 JP JP3542394A patent/JP2548101B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH07224840A (en) | 1995-08-22 |
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