JPS6088271A - Worm-wheel - Google Patents

Worm-wheel

Info

Publication number
JPS6088271A
JPS6088271A JP19487983A JP19487983A JPS6088271A JP S6088271 A JPS6088271 A JP S6088271A JP 19487983 A JP19487983 A JP 19487983A JP 19487983 A JP19487983 A JP 19487983A JP S6088271 A JPS6088271 A JP S6088271A
Authority
JP
Japan
Prior art keywords
worm
wheel
worm wheel
revolution
moment
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
Application number
JP19487983A
Other languages
Japanese (ja)
Inventor
Takahiro Masuda
増田　隆広
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP19487983A priority Critical patent/JPS6088271A/en
Publication of JPS6088271A publication Critical patent/JPS6088271A/en
Pending legal-status Critical Current

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
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/22—Toothed members; Worms for transmissions with crossing shafts, especially worms, worm-gears
    • F16H55/24—Special devices for taking up backlash

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)

Abstract

PURPOSE:To permit a worm-wheel to revolve at a moment, following the normal and reverse revolution of a worm by constituting the worm-wheel rotatably screwed with the worm which can revolve in the normal and reverse directions so that the center of gravity is positioned at eccentric position from the revolution shaft of the worm-wheel. CONSTITUTION:An imbalance mass 6 is installed onto a worm-wheel 2 so that a center of gravity is positioned at the position eccentric from the shaft of revolution of the worm-wheel, and the teeth part 3 of a worm 1 is allowed to always contact with the teeth part 4 of the worm-wheel 2 independently of the direction of normal and reverse revolutions of the worm 1. When the worm 1 revolves in A direction, the worm-wheel 2 is revolved in C direction along the teeth part 3 of the worm 1 by the turning moment of the imbalance mass 6. While, when the revolution of the worm 1 is switched to B direction, the turning moment of the worm 1 is transmitted to the worm-wheel 2 at a moment, and the worm-wheel 2 revolves in D direction against the turning moment of the imbalance mass 6.

Description

【発明の詳細な説明】 〈発明の技術分野〉 本発明はロボット等の駆動減速機に用いられるウオーム
歯車に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a worm gear used in a drive reducer for a robot or the like.

〈従来技術〉 従来のウオーム歯車として第１図に示す円筒ウオーム歯
車がある。<Prior Art> As a conventional worm gear, there is a cylindrical worm gear shown in FIG.

即ち、１は回転アクチュエータ例えばモータに連結され
て正逆回転する駆動側のウオーム、２はウオーム１に螺
合し、回転自由に支持された被駆動側のウオームホイー
ル、３けウオーム１に形成された歯のうちウオームホイ
ール２と接している歯部、４はウオームホイール２の上
部歯部３と接している歯部、５は相互が接している上記
歯部３゜４の反対側に形成される隙間である。That is, 1 is a drive-side worm connected to a rotary actuator, such as a motor, and rotates in forward and reverse directions; 2 is a driven-side worm wheel that is screwed onto the worm 1 and supported for free rotation; Of the teeth, tooth portion 4 is in contact with the worm wheel 2, tooth portion 4 is in contact with the upper tooth portion 3 of the worm wheel 2, and tooth portion 5 is formed on the opposite side of the tooth portions 3 and 4 that are in contact with each other. It is a gap between

かかる従来構成のウオーム歯車の作用を説明する。The operation of such a conventionally configured worm gear will be explained.

ウオーム１が右ねじの状態で切られているとすると、ウ
オーム１の矢印Ａ方向の回転によシ第１図に示すように
歯部３．４の接触を介してウオームホイール２が矢印Ｃ
方向に回転する。従って、この状態では上記接触箇所の
反対側の箇所に隙間５が形成されている。Assuming that the worm 1 is cut with a right-handed thread, the rotation of the worm 1 in the direction of arrow A causes the worm wheel 2 to rotate in the direction of arrow C through the contact of the teeth 3.4, as shown in FIG.
Rotate in the direction. Therefore, in this state, a gap 5 is formed at a location opposite to the contact location.

一方、このウオーム１を矢印Ａ方向の回転から矢印Ｂ方
向の回転に切換えると、ウオーム１が隙間５をうめつく
すまでの間ではウオームホイール２に回転力が伝達され
ず、隙間５を完全にうめつくした後に初めてウオームホ
イール２に回転力が伝達され、ウオームホイール２が矢
印り方向に回転し始める。On the other hand, when the rotation of the worm 1 is switched from the rotation in the direction of arrow A to the rotation in the direction of arrow B, the rotational force is not transmitted to the worm wheel 2 until the worm 1 fills the gap 5 completely. For the first time, the rotational force is transmitted to the worm wheel 2, and the worm wheel 2 begins to rotate in the direction of the arrow.

即ち、従来のウオーム歯車では隙間５のためにウオーム
１の回転に対してウオームホイール２が瞬時に追従せず
に、回転力伝達性能の点で好ましくない。また、上記隙
間５が存在すると、ウオーム１とウオームホイール２の
相互の歯部が衝突するため、騒音の発生を招くと共に、
捩）振動レベルが大きくなる不都合もある。That is, in the conventional worm gear, the gap 5 prevents the worm wheel 2 from instantaneously following the rotation of the worm 1, which is unfavorable in terms of rotational force transmission performance. Further, if the gap 5 exists, the teeth of the worm 1 and the worm wheel 2 will collide with each other, which will cause noise generation and
There is also the disadvantage that the torsional vibration level increases.

〈発明の概要〉 本発明は上記の点に鑑み為されたもので、ウオームの正
逆回転の方向にかかわらず、ウオームとウオームホイー
ルとを常時一方側で接触させる構成とすることによル、
上記従来の不都合を解消したウオーム歯車を提供するこ
とを目的とする。<Summary of the Invention> The present invention has been made in view of the above points, and has a configuration in which the worm and the worm wheel are always in contact with each other on one side regardless of the direction of forward or reverse rotation of the worm.
It is an object of the present invention to provide a worm gear that eliminates the above-mentioned conventional disadvantages.

〈発明の実施例〉 以下本発明の一実施例を第２図に基づｂて説明する。尚
、従来例と同一要素には同一符号を付して説明を略す。<Embodiment of the Invention> An embodiment of the present invention will be described below with reference to FIG. Incidentally, the same elements as those in the conventional example are given the same reference numerals and the explanation thereof will be omitted.

図にお騒て、６はフライホイール２の回転軸から偏心し
た位置に重心が位置するよう例えば該ホイール２０回動
中心位置で当該回転軸とｒｉｔｌ−水平面に位置する箇
所に取付けられたアンバランスマスで、第２図に示すよ
うにウオーム１の正逆回転の方向にかかわらずウオーム
１の歯部３とウオームホイール２の歯部４とを常時接触
させる。As shown in the figure, 6 is an unbalanced unit installed at a location where the center of gravity of the flywheel 2 is located at a position eccentric from the rotation axis of the flywheel 2, for example, at a location where the center of rotation of the wheel 20 is located on the ritl-horizontal plane with the rotation axis. As shown in FIG. 2, the tooth portion 3 of the worm 1 and the tooth portion 4 of the worm wheel 2 are always brought into contact with each other regardless of the direction of forward or reverse rotation of the worm 1.

次に作用を説明する。Next, the effect will be explained.

ウオーム１が矢印Ａ方向に回転すると、歯部３゜４の接
触を保ちながらアンバランス６の回転モーメントによシ
該ウオーム１の歯部３に沿ってウオームホイール２が矢
印Ｃ方向に回転する。When the worm 1 rotates in the direction of arrow A, the worm wheel 2 rotates in the direction of arrow C along the teeth 3 of the worm 1 due to the rotational moment of the unbalance 6 while maintaining the contact between the teeth 3 and 4.

一方、ウオーム１を矢印Ａ方向から矢印Ｂ方向の回転に
切換えると、アンバランスマス６による回転モーメント
によシラオーム１とウオームホイール２とは歯部３，４
で接触を保持されているので、瞬時にウオーム１０回転
力がウオームホイール２に伝達され、ウオームホイール
２＃−ｉアンバランスマス６による回転モーメントに抗
されながら矢印り方向に回転する。On the other hand, when the rotation of the worm 1 is switched from the direction of arrow A to the direction of arrow B, the rotation moment due to the unbalanced mass 6 causes the worm 1 and the worm wheel 2 to rotate in the toothed portions 3 and 4.
Since the contact is maintained, the rotational force of the worm 10 is instantaneously transmitted to the worm wheel 2, and the worm wheel 2#-i rotates in the direction of the arrow while being resisted by the rotational moment caused by the unbalanced mass 6.

尚、上記実施例ではアンバランスマス６をウオームホイ
ール２の第１．４象限側に設ける構成としたが、第２，
３象限側に設ける構成としてもよい。In the above embodiment, the unbalance mass 6 is provided on the 1.4 quadrant side of the worm wheel 2, but the unbalance mass 6 is provided on the 1.4th quadrant side of the worm wheel 2.
It may also be configured to be provided on the three quadrant side.

また、重心を回転軸から偏心させる手段としては、アン
バランスマスでなくともウオーノ、ホ・ｆ−ルに穴を形
成する構成でもよい。Furthermore, the means for making the center of gravity eccentric from the rotation axis does not have to be an unbalanced mass, but may be a structure in which a hole is formed in the hole or hole.

〈発明の効果〉 以上説明したように本発明では正逆回転可能なウオーム
に螺合し、回転自由に支持されたウオームホイールを、
当該ウオームホイールの回転軸から偏心して重心が位置
するウオームホイールとし、ウオームの正逆回転の方向
にかかわらずウオームとウオームホイールとを常時一方
側で接触さゼ−る構成としたので、ウオームホイールを
つ４−Ｊ、の正逆回転に対して瞬時に追従して回転さ、
けることができ、簡単な構成で安価なガタのないウオー
ム歯車を提供できる。<Effects of the Invention> As explained above, in the present invention, a worm wheel that is screwed onto a worm that can rotate forwardly and reversely and is supported to rotate freely,
The worm wheel has a center of gravity located eccentrically from the rotation axis of the worm wheel, and the worm and the worm wheel are always in contact on one side regardless of the direction of forward or reverse rotation of the worm. It rotates instantaneously following the forward and reverse rotation of 4-J,
It is possible to provide a worm gear with a simple configuration, low cost, and no backlash.

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

第１図は従来のウオーム歯車の構成図、第２図は本発明
の一実施例であるウオーム歯車の構成図である。 １・・・ウオーム　２・・・ウオームホイール６・・・
アンバランスマス 代理人　大岩増雄（ほか２名） 第２図FIG. 1 is a block diagram of a conventional worm gear, and FIG. 2 is a block diagram of a worm gear according to an embodiment of the present invention. 1... Worm 2... Worm wheel 6...
Unbalanced mass agent Masuo Oiwa (and 2 others) Figure 2

Claims (1)

【特許請求の範囲】[Claims] 正逆回転可能なウオームＫｍ合し、回転自由に支持され
たウオームホイールを、当該ウオームホイールの回転軸
から偏心して重心が位置するウオームホイールとしたこ
とを特徴とするウオーム歯車。A worm gear characterized in that a worm wheel which is rotatable in forward and reverse directions and is freely rotatably supported is a worm wheel whose center of gravity is eccentric from the rotation axis of the worm wheel.
JP19487983A 1983-10-18 1983-10-18 Worm-wheel Pending JPS6088271A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19487983A JPS6088271A (en) 1983-10-18 1983-10-18 Worm-wheel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19487983A JPS6088271A (en) 1983-10-18 1983-10-18 Worm-wheel

Publications (1)

Publication Number Publication Date
JPS6088271A true JPS6088271A (en) 1985-05-18

Family

ID=16331831

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19487983A Pending JPS6088271A (en) 1983-10-18 1983-10-18 Worm-wheel

Country Status (1)

Country Link
JP (1) JPS6088271A (en)

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