JPH0237249Y2

JPH0237249Y2 -

Info

Publication number: JPH0237249Y2
Application number: JP17815786U
Authority: JP
Priority date: 1986-11-19
Filing date: 1986-11-19
Publication date: 1990-10-09
Also published as: JPS6383956U

Description

【考案の詳細な説明】（産業上の利用分野）本考案は、小型モータに係るものであり、特
に、金属製のモータハウジングと合成樹脂製の軸
受を有した小型モータの軸受構造に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a small motor, and particularly to a bearing structure for a small motor having a metal motor housing and a synthetic resin bearing.

（従来技術）従来、金属製のモータハウジングに合成樹脂製
の軸受を取り付けたものは、第５図に示すよう
に、モータハウジング３２に軸受押え３４を突設
し、この軸受押え３４に、つば部３６を有する軸
受３８を矢印Ｃ方向から圧入することにより、モ
ータハウジング３２に圧着する構成であつた。(Prior art) Conventionally, as shown in FIG. 5, in a motor housing made of metal and a bearing made of synthetic resin attached, a bearing holder 34 is provided protruding from the motor housing 32, and a collar is attached to this bearing holder 34. The bearing 38 having the portion 36 was press-fitted to the motor housing 32 by press-fitting it from the direction of arrow C.

（考案が解決しようとする問題点）しかし、上記従来の構成では、軸受３８を軸受
押え３４に圧入することにより、モータハウジン
グ３２に圧着しただけであるため、外部の温度変
化または衝撃等により、軸受３８が外れてしまう
という問題があつた。また、軸受３８が外れない
ようにその圧着を強固にするため、軸受３８の軸
受押え３４に対する圧入強度を増すと、軸受３８
の内径３８ａが若干狭くなり、軸受３８とモータ
の回転軸との間に生じる摩擦トルクが増大すると
いう恐れがあつた。(Problems to be Solved by the Invention) However, in the above-mentioned conventional configuration, the bearing 38 is simply pressed into the motor housing 32 by press-fitting the bearing holder 34, so that external temperature changes, shocks, etc. There was a problem that the bearing 38 came off. In addition, in order to strengthen the crimp so that the bearing 38 does not come off, if the strength of the press fitting of the bearing 38 into the bearing holder 34 is increased, the bearing 38
There was a fear that the inner diameter 38a of the bearing 38 would become slightly narrower, and the frictional torque generated between the bearing 38 and the rotating shaft of the motor would increase.

本考案は上記従来の問題を解決するために為さ
れたものであり、その目的は、合成樹脂製の軸受
を金属製のモータハウジングに確実に取り付ける
ことのできる小型モータの軸受固定構造を提供す
ることである。 The present invention was devised to solve the above conventional problems, and its purpose is to provide a bearing fixing structure for a small motor that can securely attach a synthetic resin bearing to a metal motor housing. That's true.

（問題点を解決するための手段）上記目的を達成するために本考案では、底部に
軸受押えを突設した金属製のモータハウジング
と、このモータハウジング内に圧入固定されるモ
ータマグネツトと、前記軸受押えに圧入される係
合部を有した軸受と、から構成され、前記モータ
ハウジングの底部と前記モータマグネツトにより
挾着されるつば部を前記軸受に設けたことを特徴
とする。(Means for Solving the Problems) In order to achieve the above object, the present invention includes a metal motor housing with a bearing holder protruding from the bottom, a motor magnet press-fitted into the motor housing, A bearing having an engaging part press-fitted into the bearing holder, and characterized in that the bearing is provided with a flange part that is clamped by the bottom part of the motor housing and the motor magnet.

（実施例）以下図面に基づき本考案の一実施例を説明す
る。第１図は本考案の一実施例を示す断面図、第
２図は第１図の矢視Ａを示す平面図、第３図は第
２図のＢ−Ｂ線の断面図、第４図は第１図で用い
ている軸受の拡大断面図である。(Example) An example of the present invention will be described below based on the drawings. Fig. 1 is a sectional view showing one embodiment of the present invention, Fig. 2 is a plan view showing arrow A in Fig. 1, Fig. 3 is a sectional view taken along line B-B in Fig. 2, and Fig. 4. 2 is an enlarged sectional view of the bearing used in FIG. 1. FIG.

金属製のモータハウジング２は、その底部４に
後述する軸受６を圧入する軸受押え８を突設し、
また、その内周１０に凸部１２と爪１４を設け
て、モータマグネツト１６をモータハウジング２
内に圧着固定するものである。モータの回転軸
（図示せず）を回動自在に支持する軸受６は、合
成樹脂製であり、第４図に示すように、軸受押え
８に圧入される係合部１８と、軸受押え８の径よ
り大径なつば部２０からなつている。そして、つ
ば部２０の端には、モータマグネツト１６と係合
可能な小突起２２ａを有した突出部２２が設けら
れている。尚、この突出部２２は、図示のよう
に、軸受６がモータハウジング２内に挿入された
際、爪１４と係合しないように配置されている。 The metal motor housing 2 has a bearing holder 8 protruding from its bottom 4 into which a bearing 6 (described later) is press-fitted.
Further, a convex portion 12 and a claw 14 are provided on the inner circumference 10 to attach the motor magnet 16 to the motor housing 2.
It is crimped and fixed inside. The bearing 6 that rotatably supports the rotating shaft (not shown) of the motor is made of synthetic resin, and as shown in FIG. The collar part 20 has a diameter larger than that of the collar part 20. A protrusion 22 having a small protrusion 22a that can be engaged with the motor magnet 16 is provided at the end of the flange 20. Note that, as shown in the figure, the protruding portion 22 is arranged so as not to engage with the pawl 14 when the bearing 6 is inserted into the motor housing 2.

よつて、軸受６は、係合部１８が軸受押え８に
圧着され、つば部２０が底部４とモータマグネツ
ト１６により挾着されることにより、モータハウ
ジング２に固定される。 Therefore, the bearing 6 is fixed to the motor housing 2 by having the engaging portion 18 pressed against the bearing retainer 8 and the collar portion 20 being clamped between the bottom portion 4 and the motor magnet 16.

本考案は上述のような構成になつており、その
特徴的なことは、軸受６の係合部１８を軸受押え
８に圧着するとともに、そのつば部２０を底部４
とモータマグネツト１６によつて挾着したことで
あり、それにより、係合部１８と軸受押え８の圧
着力が弱くても、つば部２０が底部４とモータマ
グネツト１６によつて挾着されているため、軸受
６をモータハウジング２に強固に固定することが
できる。更に、突出部２２に設けた小突起２２ａ
がモータマグネツト１６と均一に係合するため、
モータマグネツト１６の圧入により軸受６に係る
挾着力は、突出部２２がほとんど吸収していると
いつてもよく、挾着力が軸受６の軸穴６ａに係る
力を微力化している。これは、軸受６に係る挾着
力を増しても軸穴６ａに係る歪を軽減できるとい
う効果を果たすものである。 The present invention has the above-mentioned configuration, and its characteristic feature is that the engaging part 18 of the bearing 6 is crimped to the bearing retainer 8, and the collar part 20 is attached to the bottom part 4.
As a result, even if the pressing force between the engaging part 18 and the bearing retainer 8 is weak, the collar part 20 can be clamped by the bottom part 4 and the motor magnet 16. Therefore, the bearing 6 can be firmly fixed to the motor housing 2. Furthermore, a small protrusion 22a provided on the protrusion 22
engages with the motor magnet 16 uniformly, so
It can be said that most of the clamping force applied to the bearing 6 due to the press-fitting of the motor magnet 16 is absorbed by the protrusion 22, and the clamping force reduces the force applied to the shaft hole 6a of the bearing 6. This has the effect that even if the clamping force related to the bearing 6 is increased, the strain related to the shaft hole 6a can be reduced.

（考案の効果）本考案によれば、モータハウジングに取り付け
られる軸受に、モータハウジングの底部とモータ
マグネツトにより挾着されるつば部を設けたた
め、前記軸受をモータハウジングに確実に固定す
ることができる。(Effects of the invention) According to the invention, the bearing attached to the motor housing is provided with a flange portion that is clamped by the bottom of the motor housing and the motor magnet, so that the bearing can be securely fixed to the motor housing. can.

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す断面図。第２
図は第１図の矢視Ａを示す平面図。第３図は第２
図のＢ−Ｂ線の断面図。第４図は第１図で用いて
いる軸受の拡大断面図。第５図は従来例の断面
図。２……モータハウジング、４……底部、６……
軸受、８……軸受押え、１６……モータマグネツ
ト、１８……係合部、２０……つば部。 FIG. 1 is a sectional view showing an embodiment of the present invention. Second
The figure is a plan view showing arrow A in FIG. Figure 3 is the second
A cross-sectional view taken along line B-B in the figure. FIG. 4 is an enlarged sectional view of the bearing used in FIG. 1. FIG. 5 is a sectional view of a conventional example. 2...Motor housing, 4...Bottom, 6...
Bearing, 8... Bearing holder, 16... Motor magnet, 18... Engaging portion, 20... Flange portion.

Claims

[Scope of utility model registration request]

A small motor housing 2 comprising a metal motor housing 2 with a bearing holder 8 protruding from a lower part 4, a motor magnet 16 press-fitted into the motor housing, and an engaging part 18 press-fitted into the bearing holder. In the motor bearing 6, the bearing is provided with a flange portion 20, and the end portion of the flange portion is integrally provided with a protrusion portion 22 which is held between the lower portion of the motor housing and the end face of the motor magnet. Bearings for small motors featuring: