JPH0320590Y2 - - Google Patents
Info
- Publication number
- JPH0320590Y2 JPH0320590Y2 JP1985159016U JP15901685U JPH0320590Y2 JP H0320590 Y2 JPH0320590 Y2 JP H0320590Y2 JP 1985159016 U JP1985159016 U JP 1985159016U JP 15901685 U JP15901685 U JP 15901685U JP H0320590 Y2 JPH0320590 Y2 JP H0320590Y2
- Authority
- JP
- Japan
- Prior art keywords
- driven
- rotating body
- ball
- overload
- 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
Links
- 230000005540 biological transmission Effects 0.000 claims description 23
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
Landscapes
- Transmission Devices (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Description
【考案の詳細な説明】
(イ) 産業上の利用分野
本考案は従動軸に過負荷がかかつた時、伝動を
断つトルクリミツタに関する。[Detailed description of the invention] (a) Industrial application field The present invention relates to a torque limiter that cuts off power transmission when an overload is applied to the driven shaft.
(ロ) 従来技術
従来、伝動軸に内筒を一体回転するように嵌合
し、該内筒に別の中間筒を回転は伝えるが軸方向
には移動し得るように嵌合し、更にその外周に伝
動輪のハブを遊嵌し、該ハブの内周面に弾持した
ボールを中間筒の外周の凹部に弾圧嵌合して伝動
し得るようになし、中間筒の上記凹部に隣接した
部位から周溝に向けてく字状に折曲した溝を設
け、上記凹部と周溝の間に該周溝よりも浅い溝を
穿設したトルクリミツターは既に知られている。(b) Prior art Conventionally, an inner cylinder is fitted to a transmission shaft so as to rotate together, and another intermediate cylinder is fitted to the inner cylinder so that it can transmit rotation but can move in the axial direction. A hub of a transmission wheel is loosely fitted on the outer periphery, and a ball elastically supported on the inner circumferential surface of the hub is elastically fitted into a recess on the outer periphery of the intermediate cylinder to enable transmission, and a ball adjacent to the recess of the intermediate cylinder is provided. A torque limiter is already known in which a groove is bent in a dogleg shape from a portion toward a circumferential groove, and a groove shallower than the circumferential groove is bored between the recess and the circumferential groove.
(ハ) 考案が解決しようとする問題点
前記既知のトルクリミツターは、中間筒の外周
に、凹部の外に円周溝に亙る特殊形状の溝及び凹
部と円周溝を接続する浅い溝を設ける必要がある
と等、加工が面倒であり、かつ、コスト高であ
り、しかも、過負荷の原因を除去した後に伝動せ
んとする時、ハブと中間筒等を位置合わせする操
作を行なつた後に、中間筒をハンマー等で打ち込
む操作を必要とする等の問題点があつた。(c) Problems to be solved by the invention In the known torque limiter, it is necessary to provide, on the outer periphery of the intermediate cylinder, a specially shaped groove that spans the circumferential groove in addition to the recess, and a shallow groove that connects the recess and the circumferential groove. If the cause of the overload is removed, the processing is troublesome and the cost is high.Moreover, when the cause of the overload is removed and the transmission is to be performed, the hub and the intermediate cylinder etc. must be aligned. There were problems such as the need to drive the intermediate cylinder with a hammer or the like.
(ニ) 問題点を解決するための手段
本考案は、従動軸に回転自在に嵌装した従動回
転体を駆動回転体に連動連繋し、上記従動回転体
に弾持されたボールを前記従動軸の外周の凹部に
圧入して過負荷時に伝動を断つようにしたものに
おいて、前記従動回転体の一側を受金により受け
止め、他側を弾機で上記受金側へ押圧し、前記凹
部を、過負荷時に上記ボールを上記弾機側へ案内
する螺旋溝により構成し、該螺旋溝の弾機側の端
部を円形溝に連動させることにより加工が容易
で、かつ、過負荷時には伝動を断つた状態を維持
することができるものでありながら過負荷の原因
を除去した後、自動的に伝動状態に復帰し得るよ
うにして前述の問題点を解決した。(d) Means for solving the problem The present invention involves interlocking and interlocking a driven rotating body rotatably fitted to a driven shaft with a driving rotating body, and a ball elastically supported by the driven rotating body is attached to the driven shaft. The driven rotating body is press-fitted into a recess on the outer periphery to cut off transmission in the event of an overload, in which one side of the driven rotating body is received by a receiver, the other side is pressed against the receiver side by an elastic machine, and the recess is closed. , is composed of a spiral groove that guides the ball to the bullet side during overload, and the end of the spiral groove on the bullet side is linked to a circular groove, which facilitates machining and prevents transmission during overload. The above-mentioned problem has been solved by making it possible to maintain the disconnected state and automatically return to the transmission state after removing the cause of the overload.
(ホ) 作用
従動軸に過負荷がかかると、従動回転体がボー
ルによる弾圧力及び弾機に抗して従動軸に対して
相対回動するので、従動回転体が弾機を圧縮しな
がら移動し、ボールは螺旋溝に案内されて円形溝
に移動して該円形溝内を回動し、従動回転体から
従動軸への伝動が断たれる。(E) Effect When an overload is applied to the driven shaft, the driven rotating body rotates relative to the driven shaft against the elastic force of the ball and the bullet, so the driven rotating body moves while compressing the bullet. However, the ball is guided by the spiral groove, moves to the circular groove, rotates within the circular groove, and power transmission from the driven rotating body to the driven shaft is cut off.
また、過負荷の原因を除去した後、駆動回転体
を駆動すると、従動回転体と従動軸とが相対回動
し、その間、従動軸には過負荷が負荷されておら
ず、かつ従動回転体は弾機により受金に向けて押
圧されているので、ボールが螺旋溝に侵入し、従
動回転体は、適切な伝動位置へ自動的に復帰す
る。 In addition, when the driving rotor is driven after removing the cause of the overload, the driven rotor and the driven shaft rotate relative to each other, and during that time, the driven shaft is not overloaded and the driven rotor Since the ball is pressed toward the receiver by the bullet, the ball enters the spiral groove and the driven rotating body automatically returns to the proper transmission position.
(ヘ) 実施例
本考案の一実施例を図面に示すトルクリミツタ
ついて説明すると、１は伝動ケース２にベアリン
グ３，３（一方のみ図示）により支承されていて
入力軸となる従動軸であつて、その突出部の端部
寄りの外周には螺旋溝５及びその端部に連通する
円形溝６を穿設すると共にボス７を有していて従
動回転体となる従動ギヤ８を回転自在に嵌装して
あり、該従動ギヤ８は原動機の動力により回転す
る駆動軸９（軸芯位置のみ図示）と一体で駆動回
転体となる駆動ギヤ１０に噛合している。(F) Embodiment To explain an embodiment of the present invention of a torque limiter shown in the drawings, 1 is a driven shaft supported by bearings 3, 3 (only one shown) in a transmission case 2 and serves as an input shaft; A spiral groove 5 and a circular groove 6 communicating with the end are bored on the outer periphery of the protrusion near the end, and a driven gear 8 having a boss 7 and serving as a driven rotating body is rotatably fitted therein. The driven gear 8 meshes with a drive gear 10 which is integrally formed with a drive shaft 9 (only the axis position is shown) which rotates by the power of a prime mover and which serves as a drive rotating body.
そして、前記動ギヤ８のボス７は従動軸１に、
ボス７の孔１１内のスプリング１２で押圧されて
いて前記螺旋溝５に一部嵌合するボール１３によ
り連動連繋してあり、外端面は小径部に嵌合した
座金からなる受金１５とナツト１６により受け止
められており、内端面と従動軸１に突設したフラ
ンジ１７との間には、スラストベアリング１８と
圧縮スプリングからなる弾機２０を介装してあ
る。 The boss 7 of the moving gear 8 is attached to the driven shaft 1,
It is pressed by a spring 12 in the hole 11 of the boss 7 and is interlocked by a ball 13 that partially fits into the spiral groove 5, and the outer end surface has a nut and a receiver 15 made of a washer fitted into the small diameter part. A thrust bearing 18 and a compression spring 20 are interposed between the inner end surface and a flange 17 protruding from the driven shaft 1.
また、前記従動軸１は伝動機構を介して各種の
作動部を駆動する。 Further, the driven shaft 1 drives various operating parts via a transmission mechanism.
前述のトルクリミツタにおいて、駆動ギヤ１０
は従動ギヤ８を駆動し、従動軸１に対する負荷が
前記弾機２０で設定されたトルク以下の場合、弾
機２０は従動ギヤ８を外側方へ押圧してボス７の
外端面を受金１５に圧接しているので、前記ボー
ル１３は従動軸１の螺旋溝５に係合して従動軸１
に伝動する。 In the torque limiter described above, the drive gear 10
drives the driven gear 8, and when the load on the driven shaft 1 is less than the torque set by the bullet 20, the bullet 20 presses the driven gear 8 outward to push the outer end surface of the boss 7 into the holder 15. Since the ball 13 is in pressure contact with the driven shaft 1, the ball 13 engages with the helical groove 5 of the driven shaft 1.
It is transmitted to.
しかし、前記従動軸１に設定されたトルク以上
の過負荷がかかると、従動軸１が従動ギヤ８に対
してスリツプするので、ボール１３は螺旋溝５に
案内されて円形溝６に侵入し、それにともなつて
ボール１３にボス７が係合している従動ギヤ８も
弾機２０を圧縮して移動するので、従動ギヤ８が
従動軸１に対して空転することとなり、従動軸１
への伝動が断たれる。 However, if an overload exceeding the set torque is applied to the driven shaft 1, the driven shaft 1 will slip against the driven gear 8, and the ball 13 will be guided by the spiral groove 5 and enter the circular groove 6. Along with this, the driven gear 8 in which the boss 7 is engaged with the ball 13 also compresses the bullet 20 and moves, so the driven gear 8 idles with respect to the driven shaft 1, and the driven shaft 1
transmission is cut off.
その際、弾機２０の一端は従動ギヤ８に圧接さ
れ、他端はスラストベアリング１８に受け止めら
れているので従動ギヤ８と共に無理なく回転す
る。 At this time, one end of the ammunition 20 is pressed against the driven gear 8, and the other end is received by the thrust bearing 18, so that the ammunition 20 rotates together with the driven gear 8 without difficulty.
前述のように過負荷により伝動が断たれた後
に、過負荷の原因を取り除き、駆動ギヤ１０を回
転させると、従動ギヤ８は弾機２０により受金１
５に向けて押圧されているので、ボール１３は螺
旋溝６に侵入し、従動ギヤ８と従動軸１の相対回
動により従動ギヤ８は、そのボス７が受金１５に
当接するまで移動し、正常な伝動状態に自動的に
復帰する。 After the transmission is cut off due to overload as described above, when the cause of the overload is removed and the drive gear 10 is rotated, the driven gear 8 is moved by the bullet 20 to the receiver 1.
5, the ball 13 enters the spiral groove 6, and due to the relative rotation of the driven gear 8 and the driven shaft 1, the driven gear 8 moves until its boss 7 abuts against the support 15. , automatically returns to normal transmission state.
また、前述の実施例では、従動回転体と駆動回
転体を従動ギヤ８及び駆動ギヤ１０として例示し
たが、従動スプロケツト、駆動スプロケツト及び
それらに張設したチエン、又は従動プーリー、駆
動プーリー及びそれらに張設したベルトとしても
良い。 Furthermore, in the above-described embodiment, the driven rotary body and the driving rotary body were illustrated as the driven gear 8 and the driving gear 10, but the driven sprocket, the driving sprocket, and the chain stretched thereon, or the driven pulley, the driving pulley, and the It may also be used as a stretched belt.
(ト) 考案の効果
本考案は前述のように従動軸１に回転自在に嵌
装した従動回転体を駆動回転体に連動連繋し、上
記従動回転体に弾持されたボール１３を前記従動
軸１の外周の凹部に圧入して過負荷時に伝動を断
つようにしたものにおいて、前記従動回転体の一
側を受金１５により受け止め、他側を弾機２０で
上記受金１５側へ押圧し、前記凹部を、過負荷時
に上記ボール１３を上記弾機２０側へ案内する螺
旋溝５により構成し、該螺旋溝５の弾機２０側の
端部を円形溝６に連動させたので、従動軸１に対
する負荷が弾機で設定されたトルク以下の場合は
従動回転体がボール１３を介して従動軸１の螺旋
溝５に連繋されて従動回転体と従動軸１とが一体
回転し、従動軸１に過負荷がかかると、従動回転
体はボール１３と共に弾機２０を圧縮しながら円
形溝６側へ移動し、ボール１３が円形溝６に入る
と従動軸１への伝動が断たれることとなり、結
局、過負荷がかかつた時、所定トルクで伝動を断
つことができ、また、前記既知の噛合方式のもの
のように伝動が断たれた時摩耗することがない。(G) Effects of the invention As described above, the invention connects the driven rotating body rotatably fitted to the driven shaft 1 with the driving rotating body, and the ball 13 elastically supported by the driven rotating body is attached to the driven shaft. 1 is press-fitted into a recess on the outer periphery of the rotary member 1 to cut off transmission in the event of overload, one side of the driven rotating body is received by a receiver 15, and the other side is pressed toward the receiver 15 by a spring 20. , the recessed portion is constituted by a spiral groove 5 that guides the ball 13 toward the bullet machine 20 side during overload, and the end of the spiral groove 5 on the bullet machine 20 side is interlocked with the circular groove 6, so that the driven When the load on the shaft 1 is less than the torque set by the bullet, the driven rotor is connected to the helical groove 5 of the driven shaft 1 via the ball 13, and the driven rotor and the driven shaft 1 rotate integrally. When an overload is applied to the shaft 1, the driven rotating body moves toward the circular groove 6 while compressing the bullet 20 together with the ball 13, and when the ball 13 enters the circular groove 6, the power transmission to the driven shaft 1 is cut off. As a result, when an overload is applied, the transmission can be cut off at a predetermined torque, and there is no wear when the transmission is cut off, unlike in the known meshing system.
また、過負荷の原因を取除いた後、駆動回転体
を駆動すると、従動回転体は弾機２０に押され、
それによりボール１３が螺旋溝５に侵入するの
で、従動回転体は、受金に当接した正規の伝動位
置に復帰し、位置合わせ作業及び打込み作業を行
なわなくとも自動的に伝動を再開することができ
る。 Furthermore, when the driving rotary body is driven after removing the cause of the overload, the driven rotary body is pushed by the ammunition 20,
As a result, the ball 13 enters the spiral groove 5, and the driven rotary body returns to the normal transmission position where it is in contact with the receiver, and transmission can be automatically restarted without any alignment or driving work. I can do it.
しかも、構成が簡単であるので加工が容易であ
り、コストダウンを図ることができる。 Moreover, since the structure is simple, processing is easy and costs can be reduced.
図面は本考案の一実施例を示すものであつて、
第１図は伝動装置の断面図である。
１……従動軸、５……螺旋溝、６……円形溝、
８……従動ギヤ、１０……駆動ギヤ、１３……ボ
ール、１８……スラストベアリング、２０……弾
機。
The drawings show one embodiment of the present invention,
FIG. 1 is a sectional view of the transmission. 1... Driven shaft, 5... Spiral groove, 6... Circular groove,
8... Driven gear, 10... Drive gear, 13... Ball, 18... Thrust bearing, 20... Bullet machine.
Claims (1)
駆動回転体に連動連繋し、上記従動回転体に弾
持されたボール１３を前記従動軸１の外周の凹
部に圧入して過負荷時に伝動を断つようにした
ものにおいて、前記従動回転体の一側を受金１
５により受け止め他側を弾機２０で上記受金１
５側へ押圧し、前記凹部を、過負荷時に上記ボ
ール１３を上記弾機２０側へ案内する螺旋溝５
により構成し、該螺旋溝５の弾機２０側の端部
を円形溝６に連通させたことを特徴とするトル
クリミツタ。 (2) 前記弾機２０の従動回転体と反対側をスラス
トベアリング１８で支持した実用新案登録請求
の範囲第１項記載のトルクリミツタ。[Claims for Utility Model Registration] (1) A driven rotating body rotatably fitted to the driven shaft 1 is interlocked with a driving rotating body, and the ball 13 held elastically by the driven rotating body is connected to the driven rotating body. In a device that is press-fitted into a recess on the outer periphery to cut off transmission in the event of an overload, one side of the driven rotating body is connected to the holder 1.
5, and the other side is received by the bullet 20.
5 side, and the recessed portion guides the ball 13 toward the bullet 20 side during overload.
A torque limiter characterized in that the end of the spiral groove 5 on the ammunition 20 side is communicated with a circular groove 6. (2) The torque limiter according to claim 1, wherein the side of the ammunition 20 opposite to the driven rotating body is supported by a thrust bearing 18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985159016U JPH0320590Y2 (en) | 1985-10-17 | 1985-10-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985159016U JPH0320590Y2 (en) | 1985-10-17 | 1985-10-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6268032U JPS6268032U (en) | 1987-04-28 |
| JPH0320590Y2 true JPH0320590Y2 (en) | 1991-05-02 |
Family
ID=31083049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985159016U Expired JPH0320590Y2 (en) | 1985-10-17 | 1985-10-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0320590Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS562617U (en) * | 1979-06-19 | 1981-01-10 |
-
1985
- 1985-10-17 JP JP1985159016U patent/JPH0320590Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS562617U (en) * | 1979-06-19 | 1981-01-10 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6268032U (en) | 1987-04-28 |
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