JPH0544787A - Motor reduction gear mounting structure - Google Patents

Abstract

PURPOSE:To promote the yet thinner type of a reduction gear by extending a projection toward the outside of a motor end supporting a tuning shaft bearing, while threading an inner part of the projection, and attaching a reduction gear to it with a screw. CONSTITUTION:Two projections 2, 3 are formed toward the outside from a motor end 1, and two screws 5, 6 for clamping a reduction gear 4 are screwed in the tapped holes. Each position of the projections 2, 3 is installable in making it get closer up to an outer circumference of the motor end 1 as there is no restriction from the standpoint of machining. Therefore each setup space of gears 14-17 becomes widened, thus the reduction gear 4 can be thinned as specified. In addition, each outer circumference of these projections 2, 3 is fitted in two locating holes 8, 9 bored in a lower surface 7 of the reduction gear 4, namely, serving as locating pins. In succession, positioning can be done without jumping out of a bearing 10, and a space necessary for an escape of this bearing 10 falls into disuse, so that a yet more thinner type of the reduction gear 4 is thus promotable.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、主に０．７Ｗ以下の小
型モータにおけるモータへの減速機の取り付け構造に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a structure for mounting a reduction gear on a motor in a small motor of 0.7 W or less.

【０００２】[0002]

【従来の技術】従来、モータの減速機取り付け構造とし
ては、図４に示したものが使用されている。図４におい
て、モータ４１の軸受４３を保持するモータ端面４４に
は、モータ４１の内側方向に突起４５が形成され、突起
４５の内周にねじが切られている。この突起４５は、ね
じ長さを確保するためのものであり、突起４５のねじに
減速機４８を固定するためのねじ５０がねじ込まれてい
る。モータ４１と減速機４８の位置決めのために、軸受
４３をモータ端面４４よりも飛び出させてあり、軸受４
３の外周と減速機の下面に設けられた位置決め穴４９の
内周を嵌合させている。2. Description of the Related Art Conventionally, the structure shown in FIG. 4 has been used as a speed reducer mounting structure for a motor. In FIG. 4, a projection 45 is formed inward of the motor 41 on the motor end surface 44 that holds the bearing 43 of the motor 41, and the projection 45 is internally threaded. The protrusion 45 is for ensuring a screw length, and a screw 50 for fixing the speed reducer 48 is screwed into the screw of the protrusion 45. In order to position the motor 41 and the speed reducer 48, the bearing 43 is protruded from the motor end surface 44.
3, the outer periphery of 3 and the inner periphery of a positioning hole 49 provided on the lower surface of the speed reducer are fitted together.

【０００３】[0003]

【発明が解決しようとする課題】このような従来のモー
タの減速機取り付け構造では、突起４５とモータ外径と
の距離４２を多く取ることが必要で、その分ねじの位置
がモータの中心に寄ることになる。その結果、減速機の
歯車を配置するスペースが無くなり、この例では２本の
回転軸４６、４７に４つの歯車５１、５２、５３、５４
を組み込んでおり減速機の薄型化が阻害されるという問
題があった。なぜ距離４２を多く取らねばならないか
は、突起４５の加工方法に起因している。図５ａにおい
てモータ端面６０に穴明加工がされている。次に図５ｂ
においてモータ端面６０に突起６１を出すため、プレス
加工によりパンチ６２が図面の上から下へ移動し、ダイ
６３との隙間に材料をはさみ込んで突起６１を成形す
る。この際ダイ６３には、その径方向に多大な力が加わ
るため、ダイ６３の破壊を防ぐためにダイ６３の穴部と
外周の距離６４を多く取ることが必要になり、結果的に
図４の距離４２はそれ以上必要になるのである。In such a conventional speed reducer mounting structure for a motor, it is necessary to increase the distance 42 between the protrusion 45 and the motor outer diameter, and the position of the corresponding screw is located at the center of the motor. I will stop by. As a result, there is no space for disposing the gears of the reduction gear, and in this example, the four gears 51, 52, 53, 54 are provided on the two rotary shafts 46, 47.
However, there is a problem in that reduction of the speed reducer is hindered. The reason why the distance 42 needs to be increased depends on the processing method of the protrusion 45. In FIG. 5a, the motor end surface 60 is perforated. Next in FIG.
In order to form the protrusion 61 on the motor end face 60, the punch 62 moves from the top to the bottom of the drawing by press working, and the material is inserted into the gap between the punch 63 and the die 63 to form the protrusion 61. At this time, since a great force is applied to the die 63 in the radial direction, it is necessary to increase the distance 64 between the hole portion of the die 63 and the outer circumference in order to prevent the die 63 from being broken. As a result, as shown in FIG. Distance 42 is needed more.

【０００４】また別の問題点として、モータと減速機の
位置決めを、モータの軸受外周と減速機の位置決め穴内
周でおこなうため、確実な位置決めではなく、モータの
軸受外周を中心に回転してしまう。このことは特に自動
組立をおこなう上で不都合で、モータに減速機を載せて
次にねじ止めするまでに、モータと減速機がずれてしま
うことになり、組立が非常にやりずらくなる。さらにモ
ータの軸受のスペースを減速機の中で逃げなければなら
ず、この点でも減速機の薄型化が阻害されていた。 図
６に従来の構造の減速機の平面図を示す。ねじ７５、７
６が減速機７０の内側にかなり入っているため、減速機
７０全体のスペースのうち、歯車７１、７２の配置され
るスペースがほぼ右側半分しかなく、平面スペースを有
効に使えないため、その分断面的にスペースを使わねば
ならず減速機の薄型化が阻害されていることがわかる。Another problem is that positioning of the motor and the speed reducer is performed by the outer circumference of the motor bearing and the inner circumference of the positioning hole of the speed reducer. Therefore, the positioning is not assured and the motor rotates around the outer circumference of the bearing. .. This is particularly inconvenient for automatic assembly, and the motor and the speed reducer are displaced by the time the speed reducer is mounted on the motor and screwed next time, which makes the assembly very difficult. Further, the space for the bearing of the motor has to be escaped in the reducer, which also hinders the reduction in thickness of the reducer. FIG. 6 shows a plan view of a speed reducer having a conventional structure. Screws 75, 7
Since 6 is considerably inside the speed reducer 70, the space in which the gears 71 and 72 are arranged is only about the right half of the space of the entire speed reducer 70, and the flat space cannot be effectively used. It can be seen that space must be used in the cross section, which prevents the reduction gear from being made thinner.

【０００５】本発明の目的は、減速機の薄型化をうなが
し、さらにモータと減速機の取り付けを容易にすること
ができるモータの減速機取り付け構造を提供することに
ある。An object of the present invention is to provide a reduction gear mounting structure for a motor, which facilitates reduction in the thickness of the reduction gear and facilitates mounting of the motor and the reduction gear.

【０００６】[0006]

【課題を解決するための手段】上記目的を達成するため
に、本発明のモータの減速機取り付け構造では、モータ
の回転軸の軸受を保持するモータ端面の外側方向に突起
を出し、突起の中にねじ加工をおこない、このねじを使
って前記端面に減速機を取り付ける構造をとっている。In order to achieve the above object, in the structure for mounting a speed reducer of a motor of the present invention, a protrusion is formed in a direction outward of a motor end surface holding a bearing of a rotating shaft of the motor, and The structure is such that a screw is machined on the end face and a speed reducer is attached to the end face by using this screw.

【０００７】[0007]

【作用】突起をモータの外側に出すことで、突起すなわ
ちねじの位置をモータの外周近くにすることができる。
また、外側に出た突起の外周を減速機との位置決めピン
としても利用できる。By projecting the protrusion to the outside of the motor, the position of the protrusion, that is, the screw, can be near the outer periphery of the motor.
Further, the outer circumference of the protrusion protruding to the outside can also be used as a positioning pin for the speed reducer.

【０００８】[0008]

【実施例】以下、本発明の実施例を図１により説明す
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

【０００９】モータ端面１から突起２、３をモータの外
側方向に出し、そこに減速機４を固定するためのねじ
５、６をねじ込んである。突起２、３の位置は、従来の
構造で問題となる加工上の制約がないため、モータの外
周ぎりぎりまで近づけることができる。これを図２によ
り説明する。モータのケース２０は絞り加工されてあ
り、まず図２ａにで示すように穴明加工され、次に図２
ｂにおいてバーリング加工される。このとき、ダイ２１
はモータケース２０の外側にあるため、バーリングの位
置をモータケース２０の外周ぎりぎりまで近づけても何
ら問題を生じない。ねじ５、６の位置を外周ぎりぎりま
で持っていった分、歯車１４、１５、１６、１７の配置
スペースが広くなる。次に図１の突起２、３の外周は減
速機４の下面７に明けられた位置決め穴８、９と嵌合し
ており、位置決めピンの役目も兼ねている。本実施例で
は、従来モータと減速機の位置決めのためにモータ端面
１より飛び出していた軸受１０を、飛び出させず、突起
２、３で位置決めをおこなっている。このことで、減速
機４の歯車回転軸１１、１２、１３の位置が配置しやす
くなるとともに、軸受１０の逃げに必要となる断面的ス
ペースも不要のため、さらに減速機の薄型化が容易とな
る。Projections 2 and 3 are projected from the motor end surface 1 toward the outside of the motor, and screws 5 and 6 for fixing the reduction gear 4 are screwed into the projections. Since the positions of the protrusions 2 and 3 are not limited in processing, which is a problem in the conventional structure, they can be brought close to the outer periphery of the motor. This will be described with reference to FIG. The motor case 20 has been drawn, first punched as shown in FIG.
Burring is performed at b. At this time, die 21
Is on the outside of the motor case 20, there is no problem even if the position of the burring is brought close to the outer circumference of the motor case 20. Since the positions of the screws 5 and 6 are brought to the last minute, the space for disposing the gears 14, 15, 16 and 17 becomes wider. Next, the outer peripheries of the protrusions 2 and 3 in FIG. 1 are fitted into the positioning holes 8 and 9 formed in the lower surface 7 of the speed reducer 4, and also serve as positioning pins. In this embodiment, the bearing 10, which has been protruding from the motor end face 1 for positioning the motor and the speed reducer in the related art, is positioned by the protrusions 2 and 3 without protruding. This facilitates the positions of the gear rotation shafts 11, 12, 13 of the reduction gear 4 and eliminates the need for a cross-sectional space required for the escape of the bearing 10, which facilitates further reduction of the reduction gear. Become.

【００１０】図３は本発明の効果を示す減速機の平面図
である。減速のための歯車３１、３２、３３、３４はそ
れぞれ別の回転軸３５、３６、３７、３８を持ち、減速
機３０の中心近くに配置し、固定のためのねじ３９、４
０は、外周近くの余ったスペースに配置されており、同
じ減速段数を得るのに本実施例では平面スペースを活か
しているため、従来の構造よりも薄型化が可能になる。FIG. 3 is a plan view of a speed reducer showing the effect of the present invention. The gears 31, 32, 33, 34 for reduction have different rotating shafts 35, 36, 37, 38, are arranged near the center of the speed reducer 30, and screws 39, 4 for fixing are provided.
0 is arranged in an extra space near the outer periphery, and since the flat space is utilized in the present embodiment to obtain the same number of deceleration stages, it is possible to make the device thinner than the conventional structure.

【００１１】図１において突起２、３の２本で位置決め
することは、組立上でも有利であり、特に自動組立に
て、モータ端面１に減速機４を取り付けるときに、まず
モータの端面１に突起２、３を案内として減速機４を載
せて、次にねじ５、６で固定するまでに減速機４は位置
ずれすることがない。そのため効率の良い自動組立がで
きるわけである。Positioning with the two protrusions 2 and 3 in FIG. 1 is advantageous in assembly, and particularly when the reduction gear 4 is attached to the motor end face 1 by automatic assembly, first, the protrusion is attached to the motor end face 1. The speed reducer 4 is not displaced until the speed reducer 4 is placed by using the projections 2 and 3 as guides and then fixed by the screws 5 and 6. Therefore, efficient automatic assembly can be performed.

【００１２】[0012]

【発明の効果】以上のように本発明によれば、減速機取
り付け用のねじの位置を外周近くに配置でき、さらにモ
ータの軸受を飛び出させなくてもよいため、減速機の歯
車の配置スペースが多く取れ、結果的に減速機の薄型化
ができるという効果がある。As described above, according to the present invention, the position of the screw for mounting the speed reducer can be arranged near the outer periphery, and the bearing of the motor does not have to project, so that the space for disposing the gear of the speed reducer can be reduced. Therefore, there is an effect that the reduction gear can be thinned as a result.

【００１３】また、突起２本以上で減速機の位置決めを
することができるため、組立を確実に効率よくでき、自
動組立もしやすいという効果がある。Further, since the speed reducer can be positioned with two or more protrusions, there is an effect that the assembling can be surely and efficiently performed and the automatic assembling is easy.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の実施例を示す断面図。FIG. 1 is a sectional view showing an embodiment of the present invention.

【図２】本発明の実施例の加工方法を示す断面図。FIG. 2 is a sectional view showing a processing method according to an embodiment of the present invention.

【図３】本発明の実施例の減速機を示す平面図。FIG. 3 is a plan view showing a speed reducer according to an embodiment of the present invention.

【図４】従来の取り付け構造を示す断面図。FIG. 4 is a cross-sectional view showing a conventional mounting structure.

【図５】従来の技術の加工方法を示す断面図。FIG. 5 is a cross-sectional view showing a conventional processing method.

【図６】従来の技術の減速機を示す平面図。FIG. 6 is a plan view showing a conventional speed reducer.

【符号の説明】[Explanation of symbols]

１ モータ端面 ２、３ 突起 ４ 減速機 ５、６ ねじ ７ 減速機下面 ８、９ 位置決め穴 １０ 軸受 １１、１２、１３ 歯車回転軸 １４、１５、１６、１７ 歯車 DESCRIPTION OF SYMBOLS 1 Motor end surface 2, 3 Protrusion 4 Reduction gear 5, 6 Screw 7 Lower surface of reduction gear 8, 9 Positioning hole 10 Bearing 11, 12, 13 Gear rotation shaft 14, 15, 16, 17 Gear

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 モータの回転軸の軸受を保持するモータ
端面の外側方向に突起を出し、突起の中にねじ加工をお
こない、このねじを使って、前記端面に減速機を取り付
けることを特徴とするモータの減速機取り付け構造。1. A protrusion is formed in an outer direction of a motor end surface for holding a bearing of a rotary shaft of a motor, a thread is formed in the protrusion, and the speed reducer is attached to the end surface by using the screw. Motor reducer mounting structure. 【請求項２】 前記突起の外周と減速機の位置決め穴の
内周を嵌合させて、モータと減速機の位置決めをおこな
うことを特徴とする請求項１記載のモータの減速機取り
付け構造。2. The motor speed reducer mounting structure according to claim 1, wherein the motor and the speed reducer are positioned by fitting the outer circumference of the protrusion and the inner circumference of the positioning hole of the speed reducer.