JPH08182249A - Rotational torque transmission mechanism for motor - Google Patents
Rotational torque transmission mechanism for motorInfo
- Publication number
- JPH08182249A JPH08182249A JP32025594A JP32025594A JPH08182249A JP H08182249 A JPH08182249 A JP H08182249A JP 32025594 A JP32025594 A JP 32025594A JP 32025594 A JP32025594 A JP 32025594A JP H08182249 A JPH08182249 A JP H08182249A
- Authority
- JP
- Japan
- Prior art keywords
- output shaft
- bearing portion
- crushed
- bush
- worm gear
- 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.)
- Pending
Links
Landscapes
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、小型モータに適用して
好適なモータの回転トルク伝達機構に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary torque transmitting mechanism for a motor, which is suitable for a small motor.
【０００２】[0002]
【従来の技術】従来、ウォームギヤとウォームホイール
を用いた小型モータの回転トルク伝達機構としては図９
および第１０図に示すものが知られている。この回転ト
ルク伝達機構は、モータの出力軸１に減速用のウォーム
ギヤ２をブッシュ３を介して接続し、ウォームギヤ２の
両端に設けた軸受部４，５を軸受６，７によってそれぞ
れ回転自在に軸支し、ウォームギヤ２の軸振れを防止す
るようにしたものである。出力軸１の外周にはブッシュ
３との結合力を高めるためローレット８が施されてい
る。ブッシュ３は外形状が円形以外の形状、例えば小判
型に形成されることにより、互いに平行に対向する２つ
の平坦面９ａ，９ｂを有し、これら平坦面９ａ，９ｂが
回転防止部を形成している。また、このブッシュ３が嵌
合される前記軸受部４の嵌合凹部１０も同一形状からな
る小判型の凹部とされ、その周壁のうち互いに対向する
平坦面１１ａ，１１ｂが回転防止部を形成している。出
力軸１とウォームギヤ２を結合する際には、ブッシュ３
を出力軸１に圧入嵌合した後、平坦面９ａ，９ｂと１１
ａ，１１ｂを互いに一致させてブッシュ３を嵌合凹部１
０に嵌合すればよい。なお、１２，１３は軸受部４，５
の外周面にそれぞれ形成された環状溝からなる油溜であ
る。2. Description of the Related Art Conventionally, as a rotary torque transmission mechanism for a small motor using a worm gear and a worm wheel, FIG.
And the one shown in FIG. 10 is known. In this rotational torque transmission mechanism, a reduction worm gear 2 is connected to a motor output shaft 1 via a bush 3, and bearings 4 and 5 provided at both ends of the worm gear 2 are rotatably supported by bearings 6 and 7, respectively. The worm gear 2 is supported so as to prevent shaft runout of the worm gear 2. A knurl 8 is provided on the outer periphery of the output shaft 1 in order to enhance the coupling force with the bush 3. The bush 3 has an outer shape other than a circular shape, for example, an oval shape, and thus has two flat surfaces 9a and 9b facing each other in parallel, and these flat surfaces 9a and 9b form a rotation preventing portion. ing. Further, the fitting recess 10 of the bearing 4 into which the bush 3 is fitted is also an oval recess having the same shape, and flat surfaces 11a and 11b of the peripheral walls facing each other form a rotation preventing portion. ing. When connecting the output shaft 1 and the worm gear 2, the bush 3
After press-fitting and fitting to the output shaft 1, the flat surfaces 9a, 9b and 11
a and 11b are aligned with each other and the bush 3 is fitted into the recess 1
It suffices to fit 0. In addition, 12 and 13 are bearings 4 and 5
Is an oil sump composed of annular grooves formed on the outer peripheral surface of each.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記し
た従来のモータの回転トルク伝達機構においては、軸受
部４の嵌合凹部１０を小判型に加工形成する必要がある
ため、その加工が面倒で製造コストが高くなるという問
題があった。また、油溜１２のため加工工数が１つ増加
するため、一層製造が面倒である。However, in the above-described conventional rotary torque transmission mechanism for a motor, the fitting recess 10 of the bearing 4 needs to be machined into an oval shape, which is troublesome to manufacture. There was a problem of high cost. Further, since the oil sump 12 increases the processing man-hour by one, the manufacturing is further troublesome.
【０００４】ブッシュ３による回転防止効果を高め、高
負荷伝達を可能にするために回転防止部９ａ，９ｂの面
積を大きくすると、ブッシュ３の外径が必然的に大きく
なるため、軸受部４の外径も大きくなる。その場合、ウ
ォームギヤ２の谷径が軸受部４の外径より小さいと、歯
２ａの加工を軸受部４の直前で停止する必要があり、歯
２ａの出力軸側端を綺麗に加工できないという問題があ
った。If the areas of the rotation preventing portions 9a and 9b are increased in order to enhance the rotation preventing effect of the bush 3 and to enable transmission of a high load, the outer diameter of the bush 3 will inevitably increase, so that the bearing portion 4 has a large diameter. The outer diameter also increases. In that case, if the root diameter of the worm gear 2 is smaller than the outer diameter of the bearing portion 4, it is necessary to stop the processing of the tooth 2a immediately before the bearing portion 4, and the end of the tooth 2a on the output shaft side cannot be machined cleanly. was there.
【０００５】本発明は上記したような従来の問題点に鑑
みてなされたもので、その目的とするところは、ウォー
ムギヤの軸受部の嵌合凹部を円形とすることができ、ま
たこの軸受部に回転防止部と油溜を同時加工することが
でき、加工工数および製造コストを低減し得るようにし
たモータの回転トルク伝達機構を提供することにある。
また、本発明は、高負荷伝達であっても軸受部の外径を
小さくすることができ、ウォームギヤの出力軸側端を綺
麗に加工できるようにしたモータの回転トルク伝達機構
を提供することにある。The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to make the fitting recess of the bearing portion of the worm gear circular and to provide the bearing portion. It is an object of the present invention to provide a rotation torque transmission mechanism for a motor, which can simultaneously process the rotation preventing portion and the oil sump and can reduce the number of processing steps and the manufacturing cost.
Further, the present invention provides a rotational torque transmission mechanism for a motor, which can reduce the outer diameter of the bearing portion even in the case of high load transmission and can cleanly process the output shaft side end of the worm gear. is there.
【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
請求項１に記載の発明は、モータの出力軸にウォームギ
ヤを取り付けたモータの回転トルク伝達機構において、
外周に平坦面からなる回転防止部を有するブッシュを前
記出力軸に嵌合固定し、前記ウォームギヤの一端面に円
筒状の軸受部を一体に突設し、この軸受部に前記出力軸
を前記ブッシュと共に嵌挿し、前記軸受部の外周で前記
ブッシュの回転防止部に対応する箇所を潰して軸受部内
周側に回転防止部を突出形成すると共に、前記出力軸の
潰し跡を油溜としたことを特徴とする。請求項２に記載
の発明は、モータの出力軸にウォームギヤを取り付けた
モータの回転トルク伝達機構において、前記出力軸の外
周に平坦面からなる回転防止部を設け、前記ウォームギ
ヤの一端面に円筒状の軸受部を一体に突設し、この軸受
部に前記出力軸を嵌挿し、前記軸受部の外周で前記出力
軸の回転防止部に対応する箇所を潰して軸受部内周側に
回転防止部を突出形成すると共に、前記出力軸の潰し跡
を油溜としたことを特徴とする。In order to achieve the above object, the invention as set forth in claim 1 is a rotary torque transmission mechanism for a motor, wherein a worm gear is attached to an output shaft of the motor.
A bush having an anti-rotation portion made of a flat surface on the outer periphery is fitted and fixed to the output shaft, and a cylindrical bearing portion is integrally provided on one end surface of the worm gear so as to integrally project the output shaft to the bush. It is inserted together with, and a portion corresponding to the rotation prevention portion of the bush is crushed on the outer circumference of the bearing portion to form a rotation prevention portion on the inner circumference side of the bearing portion, and the crushed trace of the output shaft is used as an oil reservoir. Characterize. According to a second aspect of the present invention, in a rotation torque transmission mechanism for a motor in which a worm gear is attached to an output shaft of the motor, a rotation preventing portion having a flat surface is provided on an outer periphery of the output shaft, and a cylindrical shape is provided on one end surface of the worm gear. Of the bearing portion is integrally projected, and the output shaft is fitted and inserted into the bearing portion, and a portion of the outer periphery of the bearing portion corresponding to the rotation preventing portion of the output shaft is crushed to provide the rotation preventing portion on the inner peripheral side of the bearing portion. It is characterized in that it is formed so as to project and that the crushed trace of the output shaft is an oil reservoir.
【０００７】[0007]
【作用】請求項１に記載の発明において、軸受部の外周
を潰すと、この潰し部分に対応する嵌合凹部の内周側に
突起が生じ、この突起はブッシュの回転防止部に当接係
合することで、ブッシュとウォームギヤを一体的に結合
し、ウォームギヤの滑り回転を防止する。つまり、突起
はウォームギヤ側の回転防止部を形成する。請求項２に
記載の発明において、軸受部の外周を潰すと、この潰し
部分に対応する嵌合凹部の内周側に突起が生じ、この突
起は出力軸の回転防止部に当接係合することで、出力軸
とウォームギヤを一体的に結合し、ウォームギヤの滑り
回転を防止する。請求項１および２の発明において、軸
受部の外周を潰すと、その跡が凹みとなり、この凹みは
油溜として機能する。油溜は潤滑油やグリス等が供給さ
れることで、軸受とウオームの軸受部との間の摩擦、お
よび摩擦に伴う発熱を軽減する。In the invention described in claim 1, when the outer periphery of the bearing portion is crushed, a protrusion is formed on the inner peripheral side of the fitting recess corresponding to the crushed portion, and the protrusion abuts on the rotation preventing portion of the bush. By mating, the bush and the worm gear are integrally connected, and the sliding rotation of the worm gear is prevented. That is, the protrusion forms a rotation preventing portion on the worm gear side. In the invention according to claim 2, when the outer periphery of the bearing portion is crushed, a protrusion is formed on the inner peripheral side of the fitting recess corresponding to the crushed portion, and the protrusion abuts and engages with the rotation preventing portion of the output shaft. As a result, the output shaft and the worm gear are integrally connected, and the slip rotation of the worm gear is prevented. In the inventions of claims 1 and 2, when the outer periphery of the bearing portion is crushed, the mark becomes a recess, and this recess functions as an oil reservoir. By supplying lubricating oil, grease, etc. to the oil reservoir, friction between the bearing and the bearing portion of the worm and heat generation due to the friction are reduced.
【０００８】[0008]
【実施例】以下、本発明を図面に示す実施例に基づいて
詳細に説明する。図１は本発明に係るモータの回転トル
ク伝達機構の第１実施例を示す断面図、図２は図１のII
−II線拡大断面図である。なお、図中図９および図１０
に示した従来構造と同一構成部品のものに対しては同一
符号をもって示し、その説明を省略する。これらの図に
おいて、本実施例はウォームギヤ２の一端面に円筒状の
軸受部４を一体に突設し、この軸受部４に出力軸１をブ
ッシュ３を介して嵌挿し、かつ軸受部４の一部外周面を
潰すことにより軸受部４、ブッシュ３および出力軸１を
一体的に結合し、ウォームギヤ２の滑り回転を防止する
ようにしたものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. FIG. 1 is a sectional view showing a first embodiment of a rotational torque transmission mechanism for a motor according to the present invention, and FIG.
It is a II line enlarged sectional view. 9 and 10 in the figure.
The same components as those of the conventional structure shown in FIG. In these drawings, in the present embodiment, a cylindrical bearing portion 4 is integrally provided on one end surface of a worm gear 2 and the output shaft 1 is inserted into the bearing portion 4 via a bush 3 and the bearing portion 4 By crushing a part of the outer peripheral surface, the bearing portion 4, the bush 3 and the output shaft 1 are integrally connected to prevent the worm gear 2 from slipping and rotating.
【０００９】前記軸受部４の嵌合凹部１０は円形の凹部
で、ブッシュ３は外周面に複数個、例えば４つの平坦面
からなる回転防止部９ａ〜９ｄが周方向に等間隔をおい
て形成されることにより、外形状が略矩形とされ、出力
軸１に圧入嵌合された後前記嵌合凹部１０に嵌挿され
る。前記軸受部４はブッシュ３が嵌挿された後、外周面
で前記各回転防止部９ａ〜９ｄに対応する部分が潰され
る。このため、潰し跡は、軸受部４の軸線方向に長い溝
１２ａ〜１２ｄをそれぞれ形成し、これらの溝１２ａ〜
１２ｄは潤滑油、グリス等が充填されることで油溜とし
て用いられる。また、軸受部４の外周を潰すと、この潰
し部分に対応する嵌合凹部１０の内周側には突起２１ａ
〜２１ｄがそれぞれ生じ、これらの突起２１ａ〜２１ｄ
はブッシュ３の回転防止部９ａ〜９ｄにそれぞれ当接係
合することで、ブッシュ３と軸受部４を一体的に結合
し、ウォームギヤ２の滑り回転を防止する。つまり、突
起２１ａ〜２１ｄはウォームギヤ２の回転防止部を構成
するものである。なお、その他の構成は図９および図１
０に示した従来構造と同様である。The fitting concave portion 10 of the bearing portion 4 is a circular concave portion, and the bush 3 has a plurality of rotation preventing portions 9a to 9d formed of, for example, four flat surfaces on the outer peripheral surface at equal intervals in the circumferential direction. As a result, the outer shape is made substantially rectangular, and the output shaft 1 is press-fitted and then fitted into the fitting recess 10. After the bush 3 is fitted in the bearing portion 4, the outer peripheral surface of the bearing portion 4 is crushed at the portions corresponding to the rotation preventing portions 9a to 9d. Therefore, the crushed marks respectively form grooves 12a to 12d that are long in the axial direction of the bearing portion 4, and these grooves 12a to 12d
12d is used as an oil reservoir by being filled with lubricating oil, grease and the like. When the outer periphery of the bearing portion 4 is crushed, the protrusion 21a is formed on the inner circumferential side of the fitting recess 10 corresponding to this crushed portion.
~ 21d respectively, these projections 21a ~ 21d
By abuttingly engaging with the rotation preventing portions 9a to 9d of the bush 3, the bush 3 and the bearing portion 4 are integrally connected, and the worm gear 2 is prevented from sliding and rotating. That is, the protrusions 21a to 21d form a rotation preventing portion of the worm gear 2. Note that other configurations are shown in FIG. 9 and FIG.
This is the same as the conventional structure shown in FIG.
【００１０】かくしてこのような構成からなるモータの
回転トルク伝達機構にあっては、軸受部４の嵌合凹部１
０を円形の凹部に形成することができるので、ウォーム
ギヤ２の製作が容易で、安価に製作することができる。
また、ウォームギヤ２の油溜１２ａ〜１２ｄと回転防止
部２１ａ〜２１ｄを潰し作業によって同時に形成するこ
とができるので、加工工数を削減することができ、この
点からもコスト低減を可能にする。さらに、各回転防止
部２１ａ〜２１ｄをブッシュ３の回転防止部９ａ〜９ｄ
に強く押し付けると、ブッシュ３と軸受部４との結合強
度が大きく、ウォームギヤ２の滑り回転を防止するた
め、高負荷伝達を可能にする。また、大きな結合力が得
られれば、回転防止部９ａ〜９ｄの面積を小さくするこ
とが可能で、ブッシュ３および軸受部４の外径を小さく
することができる。その結果、軸受部４の外径をウォー
ムギヤ２の谷径より小さくすることができ、歯２ａの出
力軸１側端部を綺麗に加工形成することができる。Thus, in the rotational torque transmission mechanism of the motor having such a structure, the fitting recess 1 of the bearing 4 is formed.
Since 0 can be formed in the circular recess, the worm gear 2 can be manufactured easily and at low cost.
Further, since the oil sumps 12a to 12d and the rotation preventing portions 21a to 21d of the worm gear 2 can be simultaneously formed by crushing work, the number of processing steps can be reduced and the cost can be reduced from this point as well. Further, the rotation preventing portions 21a to 21d are replaced by the rotation preventing portions 9a to 9d of the bush 3.
When it is strongly pressed against, the coupling strength between the bush 3 and the bearing portion 4 is large, and the worm gear 2 is prevented from slipping and rotating, so that high load transmission is possible. Further, if a large coupling force is obtained, the areas of the rotation preventing portions 9a to 9d can be reduced, and the outer diameters of the bush 3 and the bearing portion 4 can be reduced. As a result, the outer diameter of the bearing portion 4 can be made smaller than the root diameter of the worm gear 2, and the end portion of the tooth 2a on the output shaft 1 side can be machined and formed neatly.
【００１１】図３は本発明に係るモータの回転トルク伝
達機構の第２実施例を示す断面図、図４は図３のＩＶ−
ＩＶ線拡大断面図である。この実施例は出力軸１の先端
部を断面Ｄ字型とすることにより周面の一部に平坦面か
らなる回転防止部２３を設け、この出力軸１を軸受部４
の嵌合凹部１０に嵌合し、軸受部４の外周面で前記回転
防止部２３に対応する部分を潰してその跡を油溜１２と
すると共に、潰しによって軸受部４の内周面に突出形成
された突起部を前記回転防止部２３に当接係合させて軸
受部４の回転防止部２１としたものである。FIG. 3 is a sectional view showing a second embodiment of the rotational torque transmission mechanism for a motor according to the present invention, and FIG. 4 is an IV- of FIG.
It is an IV line expanded sectional view. In this embodiment, the tip of the output shaft 1 has a D-shaped cross section, so that a rotation preventing portion 23 formed of a flat surface is provided on a part of the peripheral surface.
Is fitted into the fitting recess 10 of the bearing 4, and the portion corresponding to the rotation preventing portion 23 on the outer peripheral surface of the bearing 4 is crushed to form an oil sump 12, and the crushing projects the inner peripheral surface of the bearing 4. The formed protrusion is brought into contact with and engaged with the rotation preventing portion 23 to form the rotation preventing portion 21 of the bearing portion 4.
【００１２】このような構成においては出力軸１とウォ
ームギヤ２を直接結合しているのでブッシュを必要とせ
ず、部品点数を削減することができ、また軸受部４の肉
厚を大きくすることができ、強度アップを図ることがで
きる。In such a structure, since the output shaft 1 and the worm gear 2 are directly connected, a bush is not required, the number of parts can be reduced, and the thickness of the bearing portion 4 can be increased. It is possible to increase the strength.
【００１３】図５は本発明に係るモータの回転トルク伝
達機構の第３実施例を示す断面図、図６は図５のＶＩ−
ＶＩ線拡大断面図である。この実施例は第２実施例の変
形例を示すもので、出力軸１の先端部を断面小判型とす
ることにより周面に互いに平行な２つの平坦面からなる
回転防止部２３ａ，２３ｂを設け、この出力軸１を軸受
部４の嵌合凹部１０に嵌合し、軸受部４の外周面で前記
各回転防止部２３ａ，２３ｂに対応する部分を潰してそ
の跡を油溜１２ａ，１２ｂとすると共に、潰しによって
軸受部４の内周面に突出形成された突起部を前記回転防
止部２３ａ，２３ｂに当接係合させて軸受部４の回転防
止部２１ａ，２１ｂとしたものである。FIG. 5 is a sectional view showing a third embodiment of the rotational torque transmission mechanism for a motor according to the present invention, and FIG. 6 is VI- of FIG.
It is a VI line expanded sectional view. This embodiment shows a modification of the second embodiment, in which the tip end portion of the output shaft 1 has an oval cross section, and rotation preventing portions 23a and 23b having two flat surfaces parallel to each other are provided on the circumferential surface. The output shaft 1 is fitted into the fitting recess 10 of the bearing portion 4, and the outer peripheral surface of the bearing portion 4 is crushed at the portions corresponding to the rotation preventing portions 23a and 23b, and the traces thereof are made into oil reservoirs 12a and 12b. At the same time, the protrusions formed on the inner peripheral surface of the bearing portion 4 by crushing are brought into contact with and engaged with the rotation preventing portions 23a and 23b to form the rotation preventing portions 21a and 21b of the bearing portion 4.
【００１４】このような構成においては出力軸１と軸受
部４の結合力が第２実施例に比べて大きく、ウォームギ
ヤ２の滑り回転を確実に防止することができ、高負荷伝
達を可能にする。In such a structure, the coupling force between the output shaft 1 and the bearing portion 4 is larger than that in the second embodiment, the slip rotation of the worm gear 2 can be reliably prevented, and a high load can be transmitted. .
【００１５】図７は本発明に係るモータの回転トルク伝
達機構の第４実施例を示す断面図、図８は図７のVIII−
VIII線拡大断面図である。この実施例は上記第２実施例
のさらに変形例を示すもので、出力軸１の先端部を断面
小判型とすることにより周面に互いに平行な２つの平坦
面からなる回転防止部２３ａ，２３ｂを設け、この出力
軸１を軸受部４の嵌合凹部１０に嵌合し、軸受部４の外
周面で前記各回転防止部２３ａ，２３ｂに対応する部分
をウォームギヤ２の軸線方向に離間して３箇所それぞれ
潰してその跡を油溜１２ａ〜１２ｆとすると共に、潰し
によって軸受部４の内周面に突出形成された突起部を前
記回転防止部２３ａ，ｂに当接係合させて軸受部４の回
転防止部２１ａ〜２１ｆとしたものである。FIG. 7 is a sectional view showing a fourth embodiment of the rotational torque transmission mechanism for a motor according to the present invention, and FIG. 8 is a VIII- of FIG.
FIG. 8 is an enlarged sectional view taken along line VIII. This embodiment shows a further modification of the second embodiment, and the rotation preventing portions 23a and 23b formed by two flat surfaces parallel to the peripheral surface by making the tip of the output shaft 1 oval. The output shaft 1 is fitted into the fitting recess 10 of the bearing portion 4, and the outer peripheral surface of the bearing portion 4 is separated from the portions corresponding to the rotation preventing portions 23a and 23b in the axial direction of the worm gear 2. The bearings are formed by crushing each of the three places to form the oil reservoirs 12a to 12f, and the protrusions formed on the inner peripheral surface of the bearing portion 4 by crushing are brought into contact with and engaged with the rotation preventing portions 23a and 23b. 4 rotation prevention parts 21a to 21f.
【００１６】このような構成においても上記第３実施例
と同様、出力軸１と軸受部４の結合強度を増大させるこ
とができる。Even with such a structure, the coupling strength between the output shaft 1 and the bearing portion 4 can be increased as in the third embodiment.
【００１７】なお、本発明は上記実施例に特定されるも
のではなく、種々の変形、変更が可能であり、例えば出
力軸１、ブッシュ３および軸受部４に形成される回転防
止部の数、油溜の数等を適宜増減することができる。The present invention is not limited to the above embodiment, but various modifications and changes can be made. For example, the number of rotation preventing portions formed on the output shaft 1, the bush 3 and the bearing portion 4, The number of oil reservoirs and the like can be appropriately increased or decreased.
【００１８】[0018]
【発明の効果】以上説明したように請求項１に記載の発
明に係るモータの回転トルク伝達機構にあっては、外周
に平坦面からなる回転防止部を有するブッシュを出力軸
に嵌合し、ウォームギヤの一端面に円筒状の軸受部を一
体に突設し、この軸受部に前記出力軸を前記ブッシュと
共に嵌挿し、前記軸受部の外周で前記ブッシュの回転防
止部に対応する箇所を潰して軸受部内周側に回転防止部
を突出形成すると共に、前記出力軸の潰し跡を油溜とし
たので、ブッシュと軸受部との結合力が大きく、ウォー
ムギヤの滑り回転を確実に防止することができ、高負荷
伝達を可能にする。また、軸受部の回転防止部と油溜を
潰しによって同時形成することができるので、ウォーム
ギヤの製作が容易でコスト低減を図ることができる。As described above, in the rotational torque transmission mechanism for a motor according to the first aspect of the present invention, the bush having the rotation preventing portion formed of a flat surface on the outer periphery is fitted to the output shaft, A cylindrical bearing portion is integrally provided on one end surface of the worm gear, the output shaft is fitted into the bearing portion together with the bush, and a portion corresponding to the rotation preventing portion of the bush is crushed on the outer circumference of the bearing portion. Since the rotation prevention part is formed to project on the inner peripheral side of the bearing part and the crushed trace of the output shaft is used as an oil reservoir, the coupling force between the bush and the bearing part is large, and slip rotation of the worm gear can be reliably prevented. Enables high load transmission. Further, since the rotation preventing portion of the bearing portion and the oil sump can be simultaneously formed by crushing, the worm gear can be manufactured easily and the cost can be reduced.
【００１９】さらに、ブッシュと軸受部との結合強度が
大きければ、これらの回転防止部の面積を小さくするこ
とが可能で、ブッシュおよび軸受部の外径を小さくする
ことができる。その結果、軸受部の外径をウォームギヤ
の谷径より小さくすることができ、ウォームギヤの出力
軸側端部を綺麗に加工形成することができる。Further, if the coupling strength between the bush and the bearing portion is large, the areas of these rotation preventing portions can be reduced, and the outer diameters of the bush and the bearing portion can be reduced. As a result, the outer diameter of the bearing portion can be made smaller than the root diameter of the worm gear, and the output shaft side end portion of the worm gear can be machined and formed neatly.
【００２０】また、請求項２に記載の発明に係るモータ
の回転トルク伝達機構にあっては、出力軸の外周に平坦
面からなる回転防止部を設け、ウォームギヤの一端面に
円筒状の軸受部を一体に突設し、この軸受部に前記出力
軸を嵌挿し、前記軸受部の外周で前記出力軸の回転防止
部に対応する箇所を潰して軸受部内周側に回転防止部を
突出形成すると共に、前記出力軸の潰し跡を油溜とした
ので、出力軸と軸受部との結合強度が大きく、ウォーム
ギヤの滑り回転を確実に防止することができ、高負荷伝
達を可能にする。また、ブッシュを必要とせず、部品点
数および製造コストを削減することができる。Further, in the rotating torque transmitting mechanism for a motor according to the invention as defined in claim 2, a rotation preventing portion having a flat surface is provided on the outer periphery of the output shaft, and a cylindrical bearing portion is provided on one end surface of the worm gear. And the output shaft is fitted and inserted into this bearing portion, and a portion of the outer periphery of the bearing portion corresponding to the rotation preventing portion of the output shaft is crushed to form the rotation preventing portion on the inner peripheral side of the bearing portion. At the same time, since the crushed trace of the output shaft is used as an oil sump, the coupling strength between the output shaft and the bearing portion is large, slipping rotation of the worm gear can be reliably prevented, and high load transmission is possible. Further, since the bush is not required, the number of parts and the manufacturing cost can be reduced.
【００２１】さらに、出力軸と軸受部との結合強度が大
きければ、これらの回転防止部の面積を小さくすること
が可能で、軸受部の外径を小さくすることができる。そ
の結果、軸受部の外径をウォームギヤの谷径より小さく
することができ、ウォームギヤの出力軸側端部を綺麗に
加工形成することができる。Furthermore, if the coupling strength between the output shaft and the bearing portion is large, the area of these rotation preventing portions can be reduced, and the outer diameter of the bearing portion can be reduced. As a result, the outer diameter of the bearing portion can be made smaller than the root diameter of the worm gear, and the output shaft side end portion of the worm gear can be machined and formed neatly.
【図１】 本発明に係るモータの回転トルク伝達機構の
第１実施例を示す断面図である。FIG. 1 is a sectional view showing a first embodiment of a rotational torque transmission mechanism for a motor according to the present invention.
【図２】 図１のII−II線拡大断面図である。FIG. 2 is an enlarged sectional view taken along line II-II of FIG.
【図３】 本発明の第２実施例を示す断面図である。FIG. 3 is a sectional view showing a second embodiment of the present invention.
【図４】 図３のＩＶ−ＩＶ線拡大断面図である。FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG.
【図５】 本発明の第３実施例を示す断面図である。FIG. 5 is a sectional view showing a third embodiment of the present invention.
【図６】 図５のＶＩ−ＶＩ線拡大断面図である。6 is an enlarged cross-sectional view taken along line VI-VI of FIG.
【図７】 本発明の第４実施例を示す断面図である。FIG. 7 is a sectional view showing a fourth embodiment of the present invention.
【図８】 図７のVIII−VIII線拡大断面図である。8 is an enlarged cross-sectional view taken along the line VIII-VIII of FIG.
【図９】 モータの回転トルク伝達機構の従来例を示す
断面図である。FIG. 9 is a cross-sectional view showing a conventional example of a rotation torque transmission mechanism of a motor.
【図１０】 図９のＸ−Ｘ線拡大断面図である。10 is an enlarged cross-sectional view taken along line XX of FIG.
１…出力軸、２…ウォームギヤ、３…ブッシュ、４，５
…軸受部、６，７…軸受、９，９ａ〜９ｆ…回転防止
部、１２，１２ａ〜１２ｆ…油溜、２１ａ〜２１ｄ…回
転防止部、２３，２３ａ〜２３ｂ…回転防止部。1 ... Output shaft, 2 ... Worm gear, 3 ... Bush, 4, 5
... Bearing part, 6,7 ... Bearing, 9,9a-9f ... Rotation prevention part, 12,12a-12f ... Oil sump, 21a-21d ... Rotation prevention part, 23, 23a-23b ... Rotation prevention part.
Claims (2)
けたモータの回転トルク伝達機構において、 外周に平坦面からなる回転防止部を有するブッシュを前
記出力軸に嵌合固定し、前記ウォームギヤの一端面に円
筒状の軸受部を一体に突設し、この軸受部に前記出力軸
を前記ブッシュと共に嵌挿し、前記軸受部の外周で前記
ブッシュの回転防止部に対応する箇所を潰して軸受部内
周側に回転防止部を突出形成すると共に、前記出力軸の
つぶし跡を油溜としたことを特徴とするモータの回転ト
ルク伝達機構。1. A rotating torque transmission mechanism for a motor, wherein a worm gear is attached to an output shaft of the motor, and a bush having a rotation preventing portion having a flat surface on the outer periphery is fitted and fixed to the output shaft, and is attached to one end surface of the worm gear. A cylindrical bearing portion is integrally projected, and the output shaft is fitted into the bearing portion together with the bush, and a portion corresponding to the rotation preventing portion of the bush is crushed on the outer peripheral side of the bearing portion to the inner peripheral side of the bearing portion. A rotation torque transmission mechanism for a motor, characterized in that a rotation preventing portion is formed to project and a crushed trace of the output shaft is an oil reservoir.
けたモータの回転トルク伝達機構において、 前記出力軸の外周に平坦面からなる回転防止部を設け、
前記ウォームギヤの一端面に円筒状の軸受部を一体に突
設し、この軸受部に前記出力軸を嵌挿し、前記軸受部の
外周で前記出力軸の回転防止部に対応する箇所を潰して
軸受部内周側に回転防止部を突出形成すると共に、前記
出力軸の潰し跡を油溜としたことを特徴とするモータの
回転トルク伝達機構。2. A rotation torque transmission mechanism for a motor, in which a worm gear is attached to the output shaft of the motor, wherein a rotation preventing portion having a flat surface is provided on the outer periphery of the output shaft,
A cylindrical bearing portion is integrally projectingly provided on one end surface of the worm gear, the output shaft is fitted and inserted into the bearing portion, and a portion corresponding to the rotation prevention portion of the output shaft is crushed on the outer periphery of the bearing portion to form a bearing. A rotation torque transmission mechanism for a motor, characterized in that a rotation preventing portion is formed on the inner peripheral side of the portion so as to project, and the crushed trace of the output shaft is an oil reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32025594A JPH08182249A (en) | 1994-12-22 | 1994-12-22 | Rotational torque transmission mechanism for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32025594A JPH08182249A (en) | 1994-12-22 | 1994-12-22 | Rotational torque transmission mechanism for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08182249A true JPH08182249A (en) | 1996-07-12 |
Family
ID=18119464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32025594A Pending JPH08182249A (en) | 1994-12-22 | 1994-12-22 | Rotational torque transmission mechanism for motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08182249A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220069681A (en) * | 2020-11-20 | 2022-05-27 | 엘에스일렉트릭(주) | Motor Assembly and Circuit Breaker include the same |
-
1994
- 1994-12-22 JP JP32025594A patent/JPH08182249A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220069681A (en) * | 2020-11-20 | 2022-05-27 | 엘에스일렉트릭(주) | Motor Assembly and Circuit Breaker include the same |
| WO2022108156A1 (en) * | 2020-11-20 | 2022-05-27 | 엘에스일렉트릭 (주) | Motor assembly and circuit breaker comprising same |
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