JPH0755402Y2 - Resin transmission wheel - Google Patents
Resin transmission wheelInfo
- Publication number
- JPH0755402Y2 JPH0755402Y2 JP1794288U JP1794288U JPH0755402Y2 JP H0755402 Y2 JPH0755402 Y2 JP H0755402Y2 JP 1794288 U JP1794288 U JP 1794288U JP 1794288 U JP1794288 U JP 1794288U JP H0755402 Y2 JPH0755402 Y2 JP H0755402Y2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- shaft insertion
- transmission wheel
- insertion hole
- transmission
- 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.)
- Expired - Lifetime
Links
Landscapes
- Rolls And Other Rotary Bodies (AREA)
- Gears, Cams (AREA)
Description
【考案の詳細な説明】 〈産業上の利用分野〉 本考案は、一方向クラッチや針状コロ軸受の回転部材を
介して軸に取り付けられる樹脂製ギア等の伝動輪に係
り、とくに、回転部材の装着部と動力伝動部とが軸方向
に並設される樹脂製伝動輪の改良に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a transmission wheel such as a resin gear attached to a shaft via a rotating member of a one-way clutch or a needle roller bearing, and particularly to a rotating member. The present invention relates to an improvement of a resin transmission wheel in which a mounting portion and a power transmission portion are arranged side by side in the axial direction.
〈従来の技術〉 従来の樹脂製の伝動輪で、その軸孔に一方向クラッチや
針状コロ軸受等（以下、軸受状部材と略称する）が組み
付けられ、該軸受状部材を介して軸に取り付けられるも
のは、一般には、第４図に示すように、外周にギア歯等
が設けられた伝動部10の内径側に装着部20を形成した構
造で、この装着部20の内部には軸受状部材30が嵌入によ
り組み付けられる。<Prior Art> In a conventional resin transmission wheel, a one-way clutch, a needle roller bearing, etc. (hereinafter abbreviated as a bearing member) are assembled in its shaft hole, and the shaft is attached to the shaft through the bearing member. mounted ones, generally, as shown in Figure 4, in the structure forming the attachment portion 2 0 on the inner diameter side of the transmission section 1 0 the gear teeth or the like is provided on the outer periphery, inside of the mounting portion 2 0 the bearing member 3 0 is assembled by fitting the.
上記の装着部20に組み付けられる軸受状部材30は、片側
が開放された一方向クラッチや針状コロ軸受であり、こ
れに対応して、装着部20の一側には、これらの軸受状部
材30からコロや保持器が抜け出さないように抜け止め片
40が一体に形成されている。The bearing member 3 0 to be assembled to the mounting portion 2 0 of the above, a one-way clutch or a needle roller bearing on one side is open and, correspondingly, to the one side of the mounting portion 2 0, these retainer piece from the bearing member 3 0 as roller and cage does not come off
4 0 is formed integrally.
片側開放の一方向クラッチや針状コロ軸受は、両側にコ
ロや保持器の抜け止めの付いたものより安価であるため
に、樹脂製ギア等の伝動輪と組み合わせる場合に広く採
用されている。One-way open one-way clutches and needle roller bearings are more widely used when combined with transmission wheels such as resin gears because they are cheaper than those with rollers and retainer retaining locks on both sides.
〈考案が解決しようとする問題点〉 ところで、上記の樹脂製伝動輪の中には、軸受状部材の
外径に比べて伝動部の外径が小径なものがある。このよ
うな伝動輪では、装着部の外周に伝動部を形成すること
は無理なので、第５図に示すように、装着部20の軸方向
一側に並列した形で伝動部10が形成され、全体として軸
方向に幅が広い構造となっている。<Problems to be Solved by the Invention> By the way, in some of the above resin transmission wheels, the outer diameter of the transmission portion is smaller than the outer diameter of the bearing member. In such a driving wheel, since it is impossible to form the transmission portion to the outer periphery of the mounting portion, as shown in FIG. 5, the transmission section 1 0 in parallel form to one axial side of the attachment portion 2 0 formed The overall structure is wide in the axial direction.
このような幅広の伝動輪において、片側開放の軸受状部
材30を組み付けようとすると、該部材30のコロや保持器
の抜け出しを防ぐ部分を伝動部10の内部に形成する必要
があるが、このような抜け止め部分を形成すると、伝動
輪各部の肉厚が不均一となり、成形後の収縮で変形が生
じ、伝動輪としての精度が低下する。In such a wide driving wheel, when you Kumitsukeyo bearing member 3 0 of one side open, it is necessary to form a portion to prevent escape of the member 3 0 rollers and the cage in the interior of the transmission section 1 0 However, when such a retaining portion is formed, the thickness of each portion of the transmission wheel becomes non-uniform, deformation occurs due to shrinkage after molding, and the accuracy of the transmission wheel decreases.
したがって、従来のこの種の伝動輪では、片側開放の軸
受状部材の使用を諦めて、両側に抜け止めを有する軸受
状部材を使用することとし、伝動輪本体各部の肉厚をほ
ぼ一定に設定するか、あるいは、片側開放の軸受状部材
を使用することとし、その内側に別体の抜け止め用の部
材を介装するか、する必要があり、いずれにしてもコス
ト高となる欠点があった。Therefore, with this type of conventional transmission wheel, we decided to give up using a bearing-like member that is open on one side and use a bearing-like member that has retainers on both sides, and set the thickness of each part of the transmission wheel body to be almost constant. Alternatively, it is necessary to use a bearing-like member that is open on one side, and to insert a separate member for preventing slip-out inside the bearing-like member. It was
本考案は、上述の問題点に鑑みてなされたものであっ
て、装着部と伝動部とが軸方向に並列した形で形成され
た樹脂製伝動輪において、伝動部の筒状部分の肉厚を装
着部の肉厚と同程度に設定可能として、成形後の収縮変
形を防止できるようにした。The present invention has been made in view of the above problems, and in a resin transmission wheel in which a mounting portion and a transmission portion are formed in parallel with each other in the axial direction, the wall thickness of the tubular portion of the transmission portion is increased. The thickness can be set to be approximately the same as the thickness of the mounting portion, so that shrinkage deformation after molding can be prevented.
〈問題点を解決するための手段〉 本考案では、樹脂製伝動輪を、軸挿通孔を備える樹脂製
筒体の該軸挿通孔の一方側が他方側に比して大径とさ
れ、その軸挿通孔の径の変化する位置に位置決め用の段
部面が備えられ、前記樹脂製筒体の前記軸挿通孔を大径
とした側が、筒状外輪とこの外輪内に保持されたコロと
を有する回転部材が前記段部面に位置決めされて嵌着さ
れる装着部とされ、前記樹脂製筒体の前記軸挿通孔を小
径とした側が、前記軸挿通孔の内面に軸方向に沿って樹
脂量減少用凹部が形成された伝動部とされてなる構成と
した。<Means for Solving the Problems> In the present invention, the resin transmission wheel is configured such that one side of the resin-made cylindrical body having the shaft insertion hole has a larger diameter than the other side, A stepped surface for positioning is provided at a position where the diameter of the insertion hole changes, and the side where the shaft insertion hole of the resin cylindrical body has a large diameter defines a cylindrical outer ring and a roller held in the outer ring. The rotating member has a mounting portion to be positioned and fitted to the step surface, and the side of the resin cylindrical body having the shaft insertion hole having a smaller diameter is a resin along the inner surface of the shaft insertion hole along the axial direction. The configuration is such that it is a transmission section in which a quantity reducing recess is formed.
上記樹脂量減少用凹部は、例えば、複数の溝として形成
される。The resin amount reducing recesses are formed, for example, as a plurality of grooves.
また、上記回転部材としては、一方向クラッチもしくは
針状ころ軸受が使用される。A one-way clutch or a needle roller bearing is used as the rotating member.
〈作用〉 伝動部の内面に樹脂量減少用凹部が形成され、この部分
で、いわゆる、肉盗みが可能となっているから、伝動部
の筒状部分の肉厚を、装着部の肉厚と同程度に設定する
ことができる。<Function> Since a resin amount reducing recess is formed on the inner surface of the transmission portion, and so-called meat stealing is possible at this portion, the wall thickness of the tubular portion of the transmission portion is made equal to that of the mounting portion. It can be set to the same level.
〈実施例〉 以下、本考案を図面に示す実施例に基づいて詳細に説明
する。<Embodiment> Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.
第１図は、本考案の一実施例に係る樹脂製伝動輪の断面
図、第２図は軸に装着した場合の半断面図、第３図は第
１図のIII-III線における断面図である。FIG. 1 is a sectional view of a resin transmission wheel according to an embodiment of the present invention, FIG. 2 is a half sectional view when mounted on a shaft, and FIG. 3 is a sectional view taken along line III-III in FIG. Is.
この実施例の樹脂製伝動輪は、回転部材の装着部１とタ
イミングベルト用の伝動部２とが軸方向に並列する形で
一体に形成されたものである。In the resin transmission wheel of this embodiment, the mounting portion 1 of the rotary member and the transmission portion 2 for the timing belt are integrally formed so as to be parallel to each other in the axial direction.
樹脂製伝動輪は、軸挿通孔20を備える樹脂製筒体21の軸
挿通孔20の一方側が他方側に比して大径とされ、その軸
挿通孔20の径の変化する位置に位置決め用の段部面22が
備えられている。The resin transmission wheel has a larger diameter on one side of the shaft insertion hole 20 of the resin cylindrical body 21 having the shaft insertion hole 20 than the other side, and is positioned at a position where the diameter of the shaft insertion hole 20 changes. The step surface 22 is provided.
そして、樹脂製筒体21の軸挿通孔20を大径とした側が、
筒状外輪41とこの外輪41内に保持されたコロ42とを有す
る回転部材としての一方向クラッチ４が段部面22に位置
決めされて嵌着される装着部１とされている。第２図に
示すように、装着部１内には、その内端が段部面22で受
けられる状態に、一方向クラッチ４が圧入装着される。And, the side where the shaft insertion hole 20 of the resin tubular body 21 has a large diameter,
A one-way clutch 4 as a rotating member having a cylindrical outer ring 41 and a roller 42 held in the outer ring 41 is positioned on the step surface 22 and fitted into the mounting portion 1. As shown in FIG. 2, the one-way clutch 4 is press-fitted and mounted in the mounting portion 1 such that the inner end thereof is received by the step surface 22.
また、樹脂製筒体21の軸挿通孔20を小径とした側が、軸
挿通孔20の内面に軸方向に沿って樹脂量減少用凹部とし
ての複数本の溝25が形成された伝動部２とされている。
伝動部２は、外周にタイミングベルトの係合部と係合す
る凸部5,…とガイドフランジ６とを有している。Further, the side of the resin cylindrical body 21 with the shaft insertion hole 20 having a smaller diameter is the transmission portion 2 in which a plurality of grooves 25 as resin amount reducing recesses are formed on the inner surface of the shaft insertion hole 20 along the axial direction. Has been done.
The transmission portion 2 has convex portions 5, ... And a guide flange 6 that engage with the engagement portion of the timing belt on the outer periphery.
上記のように、伝動部２の内面に樹脂量減少用凹部とし
ての複数本の溝25が形成され、これが伝動部２の肉盗み
作用を奏するので、伝動部２の筒状部分の肉厚を実質的
に装着部１の肉厚と同程度に設定することができる。そ
のため、この樹脂製伝動輪は、成形後の収縮による変形
が生じない。As described above, a plurality of grooves 25 as resin amount reducing recesses are formed on the inner surface of the transmission portion 2, and this has a function of stealing the transmission portion 2. Therefore, the thickness of the cylindrical portion of the transmission portion 2 can be reduced. It can be set to substantially the same thickness as the mounting portion 1. Therefore, the resin transmission wheel is not deformed due to shrinkage after molding.
なお、装着部１に装着する回転部材は、一方向クラッチ
４に限らず、針状コロ軸受等の軸受であってもよい。ま
た、伝動部２は、タイミングベルト用凸部に限らず、ギ
ア、プーリ、スプロケットホイール等の伝動輪の伝動部
を構成するものであってもよい。The rotating member mounted on the mounting portion 1 is not limited to the one-way clutch 4, and may be a bearing such as a needle roller bearing. Further, the transmission portion 2 is not limited to the convex portion for the timing belt, but may be a transmission portion of transmission wheels such as gears, pulleys, and sprocket wheels.
〈考案の効果〉 以上のように、本考案によれば、伝動部の内面に樹脂量
減少用凹部が形成され、この部分で、いわゆる、肉盗み
が可能となっているから、伝動部の筒状部分の肉厚を、
実質的に装着部の肉厚と同程度に設定することができ、
これにより、成形後の収縮による変形を防止できる。<Effect of the Invention> As described above, according to the present invention, the resin amount reducing recess is formed on the inner surface of the transmission portion, and so-called meat stealing is possible at this portion. The wall thickness of the
It can be set to the same level as the thickness of the mounting part,
This can prevent deformation due to shrinkage after molding.
その結果、装着部と伝動部とが軸方向に並設される樹脂
製伝動輪として、寸法精度に優れて性能の安定したもの
を提供できるようになる。As a result, it becomes possible to provide a resin transmission wheel in which the mounting portion and the transmission portion are arranged side by side in the axial direction and which has excellent dimensional accuracy and stable performance.
第１図ないし第３図は本考案の一実施例に係り、第１図
は樹脂製伝動輪の断面図、第２図は軸に装着した場合の
半断面図、第３図は第１図のIII-III線における断面図
である。 第４図および第５図はいずれも従来例の半断面図であ
る。 １……装着部、２……伝動部、４……一方向クラッチ
（回転部材）、20……軸挿通孔、21……樹脂製筒体、22
……段部面、25……溝（樹脂量減少用凹部）、41……筒
状外輪、42……コロ。1 to 3 relate to an embodiment of the present invention. FIG. 1 is a sectional view of a resin transmission wheel, FIG. 2 is a half sectional view when mounted on a shaft, and FIG. 3 is FIG. FIG. 3 is a sectional view taken along line III-III of FIG. 4 and 5 are both half-sectional views of the conventional example. 1 ... Mounting part, 2 ... Transmission part, 4 ... One-way clutch (rotating member), 20 ... Shaft insertion hole, 21 ... Resin cylinder, 22
...... Step surface, 25 ...... Groove (recess for reducing resin amount), 41 ...... Cylindrical outer ring, 42 ...... Roller.
Claims (4)
の一方側が他方側に比して大径とされ、その軸挿通孔の
径の変化する位置に位置決め用の段部面が備えられ、 前記樹脂製筒体の前記軸挿通孔を大径とした側が、筒状
外輪とこの外輪内に保持されたコロとを有する回転部材
が前記段部面に位置決めされて嵌着される装着部とさ
れ、 前記樹脂製筒体の前記軸挿通孔を小径とした側が、前記
軸挿通孔の内面に軸方向に沿って樹脂量減少用凹部が形
成された伝動部とされてなることを特徴とする樹脂製伝
動輪。1. A stepped surface for positioning at a position where a diameter of one of the shaft insertion holes of a resin cylindrical body having the shaft insertion hole is larger than that of the other side, and the diameter of the shaft insertion hole changes. The rotating member having a cylindrical outer ring and a roller held in the outer ring is positioned and fitted to the stepped surface on the side where the shaft insertion hole of the resin cylindrical body has a large diameter. And a side where the shaft insertion hole of the resin cylindrical body has a small diameter is a transmission part in which a resin amount reducing recess is formed along the axial direction on the inner surface of the shaft insertion hole. Resin transmission wheel characterized by.
求項１記載の樹脂製伝動輪。2. The resin transmission wheel according to claim 1, wherein the recess for resin amount reduction is a plurality of grooves.
を特徴とする請求項１記載の樹脂製伝動輪。3. The resin transmission wheel according to claim 1, wherein the rotating member is a one-way clutch.
特徴とする請求項１記載の樹脂製伝動輪。4. The resin transmission wheel according to claim 1, wherein the rotating member is a needle roller bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1794288U JPH0755402Y2 (en) | 1988-02-12 | 1988-02-12 | Resin transmission wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1794288U JPH0755402Y2 (en) | 1988-02-12 | 1988-02-12 | Resin transmission wheel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01121727U JPH01121727U (en) | 1989-08-17 |
| JPH0755402Y2 true JPH0755402Y2 (en) | 1995-12-20 |
Family
ID=31232152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1794288U Expired - Lifetime JPH0755402Y2 (en) | 1988-02-12 | 1988-02-12 | Resin transmission wheel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0755402Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0733837Y2 (en) * | 1990-06-18 | 1995-08-02 | 宝興産株式会社 | Balloon support |
| JP4964012B2 (en) * | 2007-04-18 | 2012-06-27 | 株式会社リコー | Driving device and image forming apparatus |
-
1988
- 1988-02-12 JP JP1794288U patent/JPH0755402Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01121727U (en) | 1989-08-17 |
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