JPH06337056A - Toothed pulley - Google Patents

Toothed pulley

Info

Publication number
JPH06337056A
JPH06337056A JP12679293A JP12679293A JPH06337056A JP H06337056 A JPH06337056 A JP H06337056A JP 12679293 A JP12679293 A JP 12679293A JP 12679293 A JP12679293 A JP 12679293A JP H06337056 A JPH06337056 A JP H06337056A
Authority
JP
Japan
Prior art keywords
pulley
toothed
teeth
elastic body
belt
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
JP12679293A
Other languages
Japanese (ja)
Inventor
Hisayoshi Morioka
久喜 森岡
Masatomo Kojima
正友 小島
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.)
Brother Industries Ltd
Original Assignee
Brother Industries Ltd
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 Brother Industries Ltd filed Critical Brother Industries Ltd
Priority to JP12679293A priority Critical patent/JPH06337056A/en
Publication of JPH06337056A publication Critical patent/JPH06337056A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To reduce the vibration and noise caused by gearing between a toothed belt and a toothed pulley and carry out smooth rotational motion without any eccentricity of a rotation center of the pulley. CONSTITUTION:A toothed pulley is composed of a boss part 2, which is a fitting part with a shaft 17 supported rotationally by a bearing 19 in a frame of a device, an outer circumference part 7, which consists of a tooth part 5 having teeth gearing with a known toothed belt in the outer circumference and a flange plate 3 formed in both sides of the tooth part 5 for preventing the toothed belt from coming off from the tooth part 5, and an elastic body 9, which is formed between the boss part 2 and the outer circumference part 7 and has a smaller spring constant in the rotational direction than a spring constant in the radius direction. In addition, the elastic body 9 reduces vibration and noise caused by gearing between belt teeth and pulley teeth and smooth rotation without any eccentricity of a rotation center can be carried out.

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、歯付きベルトを駆動す
る、あるいは、歯付きベルトによって駆動される歯付き
プーリに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toothed pulley which drives a toothed belt or is driven by the toothed belt.

【0002】[0002]

【従来の技術】従来、モータ等の駆動源からの駆動力を
伝達する手段として、ベルトとプーリによる伝達が広く
用いられていた。これには、例えば平ベルトやVベルト
のように摩擦伝動によって回転力を伝えるものと、歯付
きベルトのように噛み合い伝動によるものとがあった。
2. Description of the Related Art Conventionally, transmission by a belt and a pulley has been widely used as a means for transmitting a driving force from a driving source such as a motor. This includes, for example, a flat belt or a V-belt that transmits rotational force by frictional transmission, and a toothed belt that transmits meshing power.

【0003】歯付きベルトは、グラスファイバあるいは
ナイロンコード等の芯線に、ゴム、樹脂等のエラストマ
をかぶせて成形したものが一般的であり、歯付きプーリ
との噛み合いによって動力を伝達する。
The toothed belt is generally formed by covering a core wire such as glass fiber or nylon cord with an elastomer such as rubber or resin, and transmits power by meshing with a toothed pulley.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、従来の
歯付きプーリでは、歯付きベルトの歯とプーリの歯が噛
み合う際に衝撃が発生し、これがプーリや他の部材を振
動させ、その結果、噛み合い周波数及びその高調波等の
周波数で大きな騒音が発生するという問題点があった。
However, in the conventional toothed pulley, an impact is generated when the teeth of the toothed belt and the teeth of the pulley mesh with each other, which causes the pulley and other members to vibrate, resulting in meshing. There has been a problem that large noise is generated at the frequency and its harmonics.

【0005】この解決方法の一つとして、例えば、実開
昭60−159262号公報に開示されているように一
様の弾性体を一体成形する方法があるが、この場合、ベ
ルトとプーリの歯の衝撃を減衰させるためには、回転方
向(プーリの回転方向)のばね定数を小さくする必要が
ある。しかしながら、半径方向ではプーリの回転中心が
ずれないようにするためにばね定数を大きくする必要が
ある。このため一様の弾性体を用いると自ずと減衰効果
は制限されてしまう。
As one of the solutions, there is a method of integrally molding a uniform elastic body as disclosed in Japanese Utility Model Laid-Open No. 60-159262. In this case, the teeth of the belt and the pulley are formed. In order to damp the impact, it is necessary to reduce the spring constant in the rotation direction (pulley rotation direction). However, it is necessary to increase the spring constant in order to prevent the rotational center of the pulley from shifting in the radial direction. Therefore, if a uniform elastic body is used, the damping effect is naturally limited.

【0006】本発明は、上述した問題点を解決するため
になされたものであり、歯の噛み合いによる衝撃を減衰
し、騒音及び振動を低減する歯付きプーリを提供するこ
とを目的としている。
The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a toothed pulley that reduces the impact due to the meshing of teeth and reduces noise and vibration.

【0007】[0007]

【課題を解決するための手段】上述の目的を達成するた
めに本発明の歯付きプーリは、多数の歯を有する歯付き
ベルトの歯に噛合される多数の歯を有する歯付きプーリ
であって、歯付きプーリの一部を、回転方向のばね定数
が半径方向のばね定数よりも小さい弾性体により形成し
たことを特徴とする。
To achieve the above object, a toothed pulley of the present invention is a toothed pulley having a large number of teeth which meshes with the teeth of a toothed belt having a large number of teeth. A part of the toothed pulley is formed of an elastic body whose spring constant in the rotation direction is smaller than that in the radial direction.

【0008】[0008]

【作用】上記の構成を有する本発明の歯付きプーリによ
れば、回転方向のばね定数が半径方向のばね定数よりも
小さい弾性体により、ベルトとプーリの歯の噛み合いに
よる衝撃が減衰され、騒音及び振動が低減され、またプ
ーリの回転中心がずれることなく円滑な回転運動が可能
となる。
According to the toothed pulley of the present invention having the above construction, the impact due to the meshing of the teeth of the belt and the pulley is damped by the elastic body whose spring constant in the rotational direction is smaller than the spring constant in the radial direction. Also, vibration is reduced, and smooth rotational movement can be performed without shifting the rotational center of the pulley.

【0009】[0009]

【実施例】以下、本発明を具体化した一実施例を図面を
参照して説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

【0010】本発明を実施した歯付きプーリ1は、図1
及び図4に示すように、軸受19により装置のフレーム
に回転可能に支持された軸17との嵌合部をなすボス部
2と、周知の歯付きベルト13が噛み合う歯を外周に有
する歯部5とその歯部5の両側に形成され、歯付きベル
トの前記歯部5からのはずれを防ぐフランジ板3とから
なる外周部7と、前記ボス部2と外周部7との間に形成
され、回転方向のばね定数が半径方向のばね定数よりも
小さくなるように形成された弾性体9とによって構成さ
れている。
A toothed pulley 1 embodying the present invention is shown in FIG.
As shown in FIG. 4, a boss portion 2 forming a fitting portion with a shaft 17 rotatably supported by a frame of the apparatus by a bearing 19 and a tooth portion having teeth on the outer periphery with which a known toothed belt 13 meshes. 5 and the outer peripheral portion 7 formed on both sides of the tooth portion 5 and preventing the toothed belt from coming off from the tooth portion 5, and between the boss portion 2 and the outer peripheral portion 7. , And an elastic body 9 formed so that the spring constant in the rotational direction is smaller than the spring constant in the radial direction.

【0011】次に、本実施例の弾性体9について図1乃
至図3を用いて詳しく説明する。図1及び図2に示すよ
うに、弾性体9の中間部分には、軸方向に貫通する多数
の空間9aが形成されている。従って、この弾性体9
を、前記空間9aを1個含むようにして個々に分割すれ
ば、図3に示すような防振ゴム11とみなすことがで
き、逆に言えば、図3に示す前記防振ゴム11が多数集
合して図2に示す前記弾性体9を形成すると考えること
ができる。
Next, the elastic body 9 of this embodiment will be described in detail with reference to FIGS. As shown in FIGS. 1 and 2, a large number of spaces 9a penetrating in the axial direction are formed in the middle portion of the elastic body 9. Therefore, this elastic body 9
Can be regarded as an anti-vibration rubber 11 as shown in FIG. 3 if it is divided so as to include one space 9a, and conversely, a large number of the anti-vibration rubber 11 shown in FIG. Can be considered to form the elastic body 9 shown in FIG.

【0012】図3に示す前記防振ゴム11は、一般的に
複合型防振ゴムと呼ばれ、圧縮方向とせん断方向のばね
定数が異なることを特徴としている。図3において、Z
方向(本実施例では半径方向)のばね定数:kzと、Y
方向(本実施例では回転方向)のばね定数:kyとの剛
性比は、一寸法例でkz/ky=7となる。つまり、圧
縮方向に対しては高剛性であり、せん断方向に対しては
低剛性である。防振ゴムの寸法を変化させることにより
自由に剛性比を調整することが可能である。
The vibration isolating rubber 11 shown in FIG. 3 is generally called a composite vibration isolating rubber, and is characterized by different spring constants in the compression direction and the shearing direction. In FIG. 3, Z
Constant in the direction (radial direction in this embodiment): kz and Y
The rigidity ratio of the spring constant in the direction (rotational direction in this embodiment): ky is kz / ky = 7 in one dimension example. That is, it has high rigidity in the compression direction and low rigidity in the shear direction. It is possible to freely adjust the rigidity ratio by changing the dimensions of the anti-vibration rubber.

【0013】次に、歯付きベルトと歯付きプーリとの噛
み合いについて図4を用いて説明する。
Next, the engagement between the toothed belt and the toothed pulley will be described with reference to FIG.

【0014】図4に示すように、歯付きベルト13の歯
15と前記歯付きプーリ1の歯部5の歯が衝突すると、
その衝撃で振動及び騒音が発生する。ここで生じる騒音
振動の周波数は噛み合い周波数と呼ばれ、次式で表され
る。
As shown in FIG. 4, when the teeth 15 of the toothed belt 13 and the teeth of the tooth portion 5 of the toothed pulley 1 collide,
The impact causes vibration and noise. The frequency of noise vibration generated here is called the meshing frequency and is expressed by the following equation.

【0015】[0015]

【数1】 [Equation 1]

【0016】この噛み合い周波数:Fmでの騒音振動レ
ベルは伝達エネルギが大きいほど顕著になり、又個々の
歯での噛み合いが全て同調することから噛み合い周波
数:Fmに対する高調波も発生しやすい。
The noise vibration level at the meshing frequency: Fm becomes more remarkable as the transmitted energy is larger, and since the meshing at each tooth is all synchronized, a harmonic wave with respect to the meshing frequency: Fm is likely to occur.

【0017】しかしながら、本実施例の歯付きプーリ1
によれば、前記歯付きベルト13と前記歯付きプーリ1
が噛み合うときの衝撃力が弾性体9により緩和されるた
め、両者が噛み合うことにより発生する音を軽減するこ
とができる。また、この衝撃力により発生し前記歯付き
プーリ1、回転軸17、軸受19を介してフレームに伝
わる振動も軽減することができる。
However, the toothed pulley 1 of this embodiment is
According to the toothed belt 13 and the toothed pulley 1
Since the elastic body 9 absorbs the impact force generated when the two mesh with each other, it is possible to reduce the sound generated when the two mesh with each other. Further, vibration generated by this impact force and transmitted to the frame via the toothed pulley 1, the rotary shaft 17, and the bearing 19 can be reduced.

【0018】更に、前記歯付きプーリ1の半径方向の剛
性が高いため、プーリの回転中心がずれることなく円滑
な回転運動が可能である。図5に、従来の歯付きプーリ
を用いた場合の騒音レベルAと本実施例の場合の騒音レ
ベルBとをプーリ回転数との関係で示すように、本実施
例の場合の方が騒音レベルが低い。
Furthermore, since the rigidity of the toothed pulley 1 in the radial direction is high, smooth rotational movement is possible without the rotational center of the pulley shifting. In FIG. 5, the noise level A in the case of using the conventional toothed pulley and the noise level B in the case of this embodiment are shown in relation to the pulley rotation speed. Is low.

【0019】上述した実施例では、歯付きプーリ1の半
径方向、回転方向に対して、図3のZ方向、Y方向がそ
れぞれ一致するように弾性体9を配置したが、図6、7
に示すように、歯付きプーリ1の半径方向、回転方向に
対して図3のX方向、Y方向がそれぞれ一致するように
弾性体を配置してもよい。
In the above-described embodiment, the elastic body 9 is arranged so that the Z direction and the Y direction of FIG. 3 are aligned with the radial direction and the rotation direction of the toothed pulley 1, but FIGS.
As shown in FIG. 3, the elastic body may be arranged so that the X direction and the Y direction of FIG.

【0020】尚、本発明は以上記述した実施例に限定さ
れるものではなく、その趣旨を逸脱しない範囲において
種々の変更を加えることができる。例えば、本実施例で
は一体成形する弾性体を防振ゴムとしているが、これに
限定されることはなく、可塑性を有し、かつ粘弾性を有
する材料で圧縮方向とせん断方向のばね定数が異なるも
のであれば可能である。
The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention. For example, in this embodiment, the integrally molded elastic body is the vibration-proof rubber. However, the elastic body is not limited to this, and the material has plasticity and viscoelasticity, and the spring constants in the compression direction and the shear direction are different. Anything is possible.

【0021】[0021]

【発明の効果】以上説明したことから明かなように、本
発明の歯付きプーリによれば、回転方向のばね定数が半
径方向のばね定数よりも小さい弾性体により、ベルトと
プーリの歯の噛み合いによる衝撃が減衰され、騒音及び
振動が低減し、またプーリの回転中心がずれることなく
円滑な回転運動が可能となる。
As is apparent from the above description, according to the toothed pulley of the present invention, the meshing of the teeth of the belt and the pulley is achieved by the elastic body whose spring constant in the rotational direction is smaller than that in the radial direction. The impact due to the vibration is attenuated, noise and vibration are reduced, and a smooth rotational movement becomes possible without shifting the rotational center of the pulley.

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

【図1】本発明の歯付きプーリの縦断面図である。FIG. 1 is a vertical cross-sectional view of a toothed pulley of the present invention.

【図2】本発明の歯付きプーリの横断面図である。FIG. 2 is a cross-sectional view of the toothed pulley of the present invention.

【図3】弾性体の詳細図である。FIG. 3 is a detailed view of an elastic body.

【図4】歯付きベルトと歯付きプーリの噛み合い状態を
示す図である。
FIG. 4 is a diagram showing a meshed state of a toothed belt and a toothed pulley.

【図5】騒音レベルとプーリ回転数との関係を示す図で
ある。
FIG. 5 is a diagram showing a relationship between a noise level and a pulley rotation speed.

【図6】本発明の他の実施例を示す縦断面図である。FIG. 6 is a vertical sectional view showing another embodiment of the present invention.

【図7】その弾性体のみを示す斜視図である。FIG. 7 is a perspective view showing only the elastic body.

【符号の説明】[Explanation of symbols]

1 歯付きプーリ 7 外周部 9 弾性体 11 防振ゴム 1 Toothed pulley 7 Outer peripheral portion 9 Elastic body 11 Anti-vibration rubber

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 多数の歯を有する歯付きベルトの歯に噛
合される多数の歯を有する歯付きプーリにおいて、 歯付きプーリの一部を、回転方向のばね定数が半径方向
のばね定数よりも小さい弾性体により形成したことを特
徴とする歯付きプーリ。
1. A toothed pulley having a large number of teeth which meshes with teeth of a toothed belt having a large number of teeth, wherein a part of the toothed pulley has a spring constant in a rotational direction more than a spring constant in a radial direction. A toothed pulley characterized by being formed of a small elastic body.
JP12679293A 1993-05-28 1993-05-28 Toothed pulley Pending JPH06337056A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12679293A JPH06337056A (en) 1993-05-28 1993-05-28 Toothed pulley

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12679293A JPH06337056A (en) 1993-05-28 1993-05-28 Toothed pulley

Publications (1)

Publication Number Publication Date
JPH06337056A true JPH06337056A (en) 1994-12-06

Family

ID=14944066

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12679293A Pending JPH06337056A (en) 1993-05-28 1993-05-28 Toothed pulley

Country Status (1)

Country Link
JP (1) JPH06337056A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7789483B2 (en) 2005-12-28 2010-09-07 Brother Kogyo Kabushiki Kaisha Carriage driving unit and image recording apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7789483B2 (en) 2005-12-28 2010-09-07 Brother Kogyo Kabushiki Kaisha Carriage driving unit and image recording apparatus

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