JPH0893869A - Springing pressure mechanism of endless transmission gear - Google Patents
Springing pressure mechanism of endless transmission gearInfo
- Publication number
- JPH0893869A JPH0893869A JP22459794A JP22459794A JPH0893869A JP H0893869 A JPH0893869 A JP H0893869A JP 22459794 A JP22459794 A JP 22459794A JP 22459794 A JP22459794 A JP 22459794A JP H0893869 A JPH0893869 A JP H0893869A
- Authority
- JP
- Japan
- Prior art keywords
- springs
- spring
- endless
- mounting
- pressure mechanism
- 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
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
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0808—Extension coil springs
Landscapes
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明はコンバイン等の作業機に
おいてベルト又はチェン伝動を行なう無端伝動装置のテ
ンション機構に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension mechanism for an endless transmission device for performing belt or chain transmission in a working machine such as a combine.
【0002】[0002]
【従来の技術】従来、コンバイン等の作業機においてエ
ンジンから穀粒の搬送ラセンを回転駆動する伝動手段と
しては、図4に示すようなベルトによる無端伝動装置が
主として実施されている。即ち、伝動装置は、作業機1
(図1)に搭載されたエンジン2の回転軸3に固着した
駆動プーリ(駆動輪) 4から穀粒搬送装置5のラセン軸
(回転軸)6に取着された従動プーリ4aにベルト(無
端帯)7を張架するとともに、このベルト7の緩み側の
一側を前記回転軸6に揺動可能に軸支される回動アーム
8の先端部に軸支したテンションプーリ(押接輪)9を
弾圧機構10を介して押接してエンジン2の動力を回転
軸6に伝え、穀粒搬送装置5を回転作動させて穀粒の搬
送を行なうようにしている。2. Description of the Related Art Conventionally, in a working machine such as a combine, an endless transmission device using a belt as shown in FIG. 4 has been mainly used as a transmission means for rotationally driving a grain conveying spiral from an engine. That is, the transmission is the work machine 1
A belt (endless belt) is attached from a drive pulley (drive wheel) 4 fixed to a rotary shaft 3 of an engine 2 mounted on (Fig. 1) to a driven pulley 4a attached to a spiral shaft (rotary shaft) 6 of a grain transfer device 5. (Band) 7 is stretched, and one side of the loose side of the belt 7 is rotatably supported by the rotary shaft 6 on the tip end of a rotating arm 8 which is a tension pulley (pressing wheel). 9 is pushed through the elastic pressure mechanism 10 to transmit the power of the engine 2 to the rotating shaft 6, and the grain conveying device 5 is rotated to convey the grains.
【0003】そして上記弾圧機構10は、機体フレーム
11に設けたロックナット12,12付きの調節ネジ1
3と前記回動アーム8との間にコイルスプリング20を
設け、この調節ネジ13の突出長さを調節してスプリン
グ20引張力を加減してテンションプーリ9の押圧力を
調整して適正なベルト7の張力により伝動するようにし
ている。The above-mentioned elastic pressure mechanism 10 comprises an adjusting screw 1 with lock nuts 12, 12 provided on a machine body frame 11.
A coil spring 20 is provided between the rotating arm 8 and the rotating arm 8, and the protrusion length of the adjusting screw 13 is adjusted to adjust the pulling force of the spring 20 to adjust the pressing force of the tension pulley 9. It is designed to be transmitted by the tension of 7.
【0004】[0004]
【発明が解決しようとする課題】従来の無端伝動装置は
脱殻機(図示せず)等の側方で狭小な部位に設置される
ためテンションプーリ9の押接張力を自動的に張圧して
可動させる調節距離Lが大きく取れない。従って伝動を
適切に行なう所定の張力を得るためにはバネ定数の大き
なスプリング20を使用する必要がある。Since the conventional endless transmission is installed in a narrow area on the side of a shelling machine (not shown) or the like, it is automatically moved by pressing the tension of the tension pulley 9 automatically. A large adjustment distance L cannot be obtained. Therefore, it is necessary to use the spring 20 having a large spring constant in order to obtain a predetermined tension for proper transmission.
【0005】しかし、このような強いスプリング20を
使用すると、マウントゴムで防振構造で支持されたエン
ジン2がクラッチを入りにさて急負荷を掛けられたと
き、振動や機体の揺れ等によりベルト7の緩み側に振れ
た場合に、このスプリング20がテンションプーリ9を
適切に押接伝動するように追随することができず、伝動
スリップを生ずることがあり、これによりラセン軸(回
転軸)6の初期の駆動が不充分となって穀粒の搬送詰ま
りを生じ、継続伝動が不能になるという問題がある。However, when such a strong spring 20 is used, when the engine 2 supported by the mount rubber in a vibration-proof structure is subjected to a sudden load with the clutch engaged, the belt 7 is vibrated or shaken due to vibration or the like. When the spring 20 is swung to the loose side, the spring 20 cannot follow the tension pulley 9 so as to appropriately press and transmit the tension pulley 9, and a transmission slip may occur. As a result, the helical shaft (rotary shaft) 6 There is a problem in that the initial drive becomes insufficient and the conveyance of the grain becomes clogged, making continuous transmission impossible.
【0006】また、ベルト7はエンジン2が発する高熱
でベルト伸び易いが、この場合狭小な部分に設置された
スプリング20の張力調節を随時行うことが困難であ
り、その結果、スプリング20がベルト伸びに追従しき
れずに伝動不良を生ずる欠点がある。Further, the belt 7 is apt to stretch due to the high heat generated by the engine 2, but in this case, it is difficult to adjust the tension of the spring 20 installed in the narrow portion at any time, and as a result, the spring 20 stretches the belt. However, there is a drawback that transmission failure occurs due to failure to follow up with.
【0007】[0007]
【課題を解決しようとする手段】本発明は前記従来の装
置の問題点を解消した無端伝動装置の弾圧機構を提供す
るものであって、駆動輪と従動輪間に無端帯を張架し、
該張架された無端帯の一側を取付軸を中心に揺動回動す
る回動アームに軸支された押接輪を弾圧機構により押接
することにより伝動する無端伝動装置において、前記弾
圧機構を前記回動アームに少なくとも左右2本のスプリ
ングを係止させるとともに、該両スプリングの他端を機
体フレームに設けた取付部に取付ピンを介して揺動回動
可能に枢支される取付片に、該取付ピンを中心に天秤状
に回動可能となるように係止させて構成している。SUMMARY OF THE INVENTION The present invention provides an elastic mechanism for an endless transmission which solves the problems of the above-mentioned conventional device, in which an endless belt is stretched between a driving wheel and a driven wheel,
In the endless transmission device, which is transmitted by pressing a pressing ring, which is pivotally supported by a rotating arm that swings and rotates one side of the stretched endless band around a mounting shaft, by a pressing mechanism. At least two left and right springs are locked to the rotating arm, and the other ends of the both springs are pivotally supported by a mounting pin provided on the machine body frame so as to be swingably rotatable via a mounting pin. In addition, the mounting pin is locked so as to be rotatable around the mounting pin in a balance shape.
【0008】また、回動アームに係止された両スプリン
グのうち該回動アームの取付軸側に係止させたスプリグ
を他のスプリングよりもバネ定数を高くした強スプリン
グにするとともに、取付片に強スプリングの係止側への
回動を規制するストッパを設けたことを特徴としてい
る。Further, of both springs locked to the rotary arm, the sprig locked to the mounting shaft side of the rotary arm is made a strong spring having a higher spring constant than the other springs, and the mounting piece. It is characterized in that a stopper for restricting rotation of the strong spring toward the locking side is provided.
【0009】[0009]
【作 用】以上の構成により、無端帯7に伸びが生じた
場合、或いは低負荷伝動の場合には押接輪9が取付軸6
を中心に複数のスプリング20,21により弾圧され
て、前記無端帯7に追随して適切に押接し、伝動を確実
に行なうことができる。また、無端伝動装置に高負荷が
かかり無端帯7が張られる場合には、前記スプリング2
0,21が押接輪9の可動を速やか且つ円滑に許容しな
がら、その伝動負荷に対応して適切な張力で無端帯7を
押接するので伝動を良好確実に行なうことができる。[Operation] With the above configuration, when the endless belt 7 is stretched or when a low load is transmitted, the pressing ring 9 is attached to the mounting shaft 6.
The elastic force is exerted by a plurality of springs 20 and 21 centering on the center, and the endless belt 7 is appropriately pressed and pressed to follow the endless belt 7 for reliable transmission. Further, when a high load is applied to the endless transmission and the endless belt 7 is stretched, the spring 2
While 0 and 21 allow the push contact wheel 9 to move quickly and smoothly, the endless belt 7 is pressed against the transmission load with an appropriate tension corresponding to the transmission load, so that the transmission can be performed satisfactorily and reliably.
【0010】[0010]
【実 施 例】次に図面を参照して本発明の実施例を説
明する。本発明に係る無端伝動装置の基本レイアウト及
び伝動構成は、先に述べた従来構成と同じなのでこれを
省略し、弾圧機構10部分の要部について図2を参照し
説明する。EXAMPLES Examples of the present invention will be described with reference to the drawings. The basic layout and transmission structure of the endless transmission according to the present invention are the same as the conventional structure described above, and therefore the description thereof will be omitted, and the main part of the elastic pressure mechanism 10 will be described with reference to FIG.
【0011】弾圧機構10にはバネ定数を異ならせた複
数本、好ましくは2本のスプリングが使用されている。
具体的には、線径を太くして弾性力を強く設定した強ス
プリング20と、前記線径より線径を小さくして弾性力
を低く設定した弱スプリング21の複数のスプリングを
回動アーム8と調節ネジ13間に併設している。A plurality of springs having different spring constants, preferably two springs are used in the elastic pressure mechanism 10.
Specifically, a plurality of springs, a strong spring 20 having a thicker wire diameter and a stronger elastic force, and a weak spring 21 having a wire diameter smaller than the wire diameter and a lower elastic force, are used to rotate the arm 8. And the adjusting screw 13 are installed side by side.
【0012】即ち、強スプリング20と弱スプリング2
1の上端部を回動アーム8の取付軸6側から順次並べて
係合(取付軸6側を強くする)するとともに、これらの
下端部を前記調節ネジ13の上端部に取付ピン22によ
り回動可能に枢支された取付片23の左右の係合孔23
a,23bに係合止着している。以上の構成により、ベ
ルト7が使用に際し伸びを生じたとき、及びエンジン3
振動(揺れ)により緩みを生じたときに、強スプリング
20が回動アーム8の回動基部側を強く引き、また弱ス
プリング21が回動ストロークの大きいテンションプー
リ9の近傍を弱く引くことにより、テンションプーリ9
を前記ベルト7の緩み代に速やかに、且つ適切に対応し
て良好に押接し張圧するのでベルトスリップ等を生ずる
ことなく伝動を確実に行なうことができる。That is, the strong spring 20 and the weak spring 2
The upper ends of the rotating arms 8 are sequentially arranged from the side of the mounting shaft 6 of the rotating arm 8 to engage with each other (strengthen the mounting shaft 6 side), and the lower ends of these are rotated to the upper end of the adjusting screw 13 by the mounting pin 22. Left and right engagement holes 23 of the mounting piece 23 pivotably supported
It is engaged and fixed to a and 23b. With the above configuration, when the belt 7 is stretched during use, and the engine 3
When loosening is caused by vibration (shaking), the strong spring 20 strongly pulls the rotation base side of the rotation arm 8 and the weak spring 21 weakly pulls the vicinity of the tension pulley 9 having a large rotation stroke. Tension pulley 9
Since the belt 7 is pressed and tensioned quickly and appropriately in response to the loosening margin of the belt 7, the transmission can be reliably performed without causing belt slip and the like.
【0013】また初期駆動時並びに高負荷伝動時にベル
ト7の緩み側が引張られて巻角を小にして伝動能力が低
下させられようとする時は、前記両スプリング20,2
1がそれぞれの部位において回動アーム8の上部を抑制
させるように働いてベルト7をテンションプーリ9が適
切に押圧して伝動巻角を維持し、ベルト外れや伝動スリ
ップ等の不具合を防止して良好な伝動を円滑に行なうこ
とができる。Further, when the loose side of the belt 7 is pulled to reduce the winding angle to reduce the power transmission capability at the time of initial drive and high load transmission, both the springs 20 and 2 are used.
1 acts to suppress the upper part of the rotating arm 8 in each part, the tension pulley 9 presses the belt 7 appropriately to maintain the transmission winding angle, and prevents problems such as belt detachment and transmission slip. Good transmission can be performed smoothly.
【0014】このとき、取付片23は揺動回動される回
動アーム8の変動に対し両スプリング20,21が伸縮
する引張り力に応じ、取付ピン22を中心にその引張り
方向に天秤状に回動して追従して変位するので、両バネ
20,21はよじられたり、また不必要に引き伸ばされ
たりすることなく適正な平行姿勢で引張ることができ
る。At this time, the mounting piece 23 is shaped like a balance around the mounting pin 22 in accordance with the tensile force of expansion and contraction of the springs 20 and 21 with respect to the fluctuation of the pivoting arm 8 which is pivotally rotated. Since the springs 20 and 21 rotate and follow and are displaced, the springs 20 and 21 can be pulled in a proper parallel posture without being twisted or unnecessarily stretched.
【0015】このように取付片23は取付ピン22を中
心として両スプリング20,21による引張り力が釣り
合った部位において姿勢を安定されるので両スプリング
20,21の取付孔(作用点)32a,23bには略等
しい力が常に作用することとなる。また、2本(複数)
のスプリング20,21で張圧することにより1本当り
のバネ定数を下げることができるのでベルト7の変動に
対する追従性を向上することができる。As described above, since the mounting piece 23 has its posture stabilized at a portion where the tensile forces of the springs 20 and 21 are balanced around the mounting pin 22, the mounting holes (points of action) 32a and 23b of the springs 20 and 21 are provided. Forces that are almost equal will always act on. Also, two (plural)
Since the spring constant per one can be lowered by tensioning with the springs 20 and 21, the followability to the fluctuation of the belt 7 can be improved.
【0016】また図3に示すように、既述の取付片23
に前記回動アーム8が上動する際の回動方向側に、その
回動を規制するストッパ24を設けることにより、テン
ションプーリ9がベルト7に持ち上げられて上動する際
の押接力を上記ストッパ24が調節ネジ13に接当して
その回動を規制するので、特に強スプリング20がその
上動を抑制するように作用することができ、伝動を確実
に行なわせることができる。Further, as shown in FIG. 3, the above-mentioned mounting piece 23
By providing a stopper 24 on the side of the rotating direction when the rotating arm 8 moves upward, the pressing force when the tension pulley 9 is lifted by the belt 7 and moves upward is set as described above. Since the stopper 24 contacts the adjusting screw 13 and restricts its rotation, the strong spring 20 can act so as to suppress its upward movement, and the transmission can be reliably performed.
【0017】[0017]
【発明の効果】本発明に係る無端伝動装置の弾圧機構
は、駆動輪と従動輪間に無端帯を張架し、該無端帯の一
側を取付軸を中心に揺動回動する回動アームに軸支され
た押接輪を弾圧機構により押接することにより伝動する
無端伝動装置において、前記弾圧機構を前記回動アーム
に少なくとも左右2本のスプリングを係止させるととも
に、該両スプリングの他端を機体フレームに設けた取付
部に取付ピンを介して揺動回動可能に枢支される取付片
に、該取付ピンを中心に天秤状に回動可能となるように
係止させて構成している。The elastic force mechanism of the endless transmission according to the present invention is such that the endless belt is stretched between the drive wheel and the driven wheel, and one side of the endless belt is pivotally rotated about the mounting shaft. In an endless transmission device for transmitting by pressing a pressing wheel axially supported by an arm by an elastic pressure mechanism, at least two springs on the left and right of the elastic pressure mechanism are locked to the rotating arm, An end is locked to a mounting piece pivotally supported by a mounting pin provided on the body frame via a mounting pin so as to be rotatable in a balance-like manner about the mounting pin. are doing.
【0018】従って、バネ定数の低いスプリングを用い
ながら適切に回動アームを弾圧できるので、狭小な調節
間隔内に押接輪の押接性能のより弾圧機構を簡単に設置
することができる。また、回動アームに係止された両ス
プリングのうち、該回動アームの取付軸側に係止させた
スプリングを他のスプリングよりもバネ定数を高くした
強スプリングにするとともに、取付片に強スプリングの
係止側への回動を規制するストッパを設けている。Therefore, since it is possible to appropriately press the rotating arm while using the spring having a low spring constant, it is possible to easily install the elastic pressing mechanism having the pressing performance of the pressing wheel within the narrow adjustment interval. Of the two springs that are locked to the rotating arm, the spring that is locked to the mounting shaft side of the rotating arm is a strong spring with a higher spring constant than the other springs, and the spring is strong on the mounting piece. A stopper that restricts the rotation of the spring toward the locking side is provided.
【0019】従って、回動アームが揺動する際、回動距
離の異なる該回動アームの取付部に両スプリングの押圧
力を適切に作用させることができ、無端帯の変動に対し
押接輪を良好に追動させることができるとともに、高負
荷時において取付片の回動を規制して押接輪の押圧力を
大きくするように作用させ、無端帯外れを防止して転動
を確実に行なうことができる。Therefore, when the rotating arm swings, the pressing force of both springs can be appropriately applied to the mounting portions of the rotating arm having different rotating distances, and the pressing ring can be moved against the fluctuation of the endless belt. Can be driven well, and at the time of high load, the rotation of the mounting piece is regulated to increase the pressing force of the pressing ring, preventing endless stripping and ensuring rolling. Can be done.
【図1】本発明の実施例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of the present invention.
【図2】本発明の要部を示す正面図である。FIG. 2 is a front view showing a main part of the present invention.
【図3】(A)は別の実施例の正面図、(B)取付片部
の側面図である。FIG. 3A is a front view of another embodiment, and FIG. 3B is a side view of a mounting piece portion.
【図4】従来例を示す正面図である。FIG. 4 is a front view showing a conventional example.
1 作業機 4 駆動輪 4a 従動輪 6 取付軸
(回転軸) 7 無端帯(ベルト) 8 回動アー
ム 9 押接輪(テンションプーリ) 10 弾圧機
構 13 取付部(調節ネジ) 20 強スプ
リング 21 弱(スプリング) 22 取付ピ
ン 23 取付片 23a スト
ッパ1 Working Machine 4 Drive Wheel 4a Driven Wheel 6 Mounting Shaft (Rotating Shaft) 7 Endless Belt (Belt) 8 Rotating Arm 9 Pushing Wheel (Tension Pulley) 10 Repression Mechanism 13 Mounting Part (Adjusting Screw) 20 Strong Spring 21 Weak ( Spring) 22 Mounting pin 23 Mounting piece 23a Stopper
Claims (2)
無端帯の一側を取付軸を中心に揺動回動する回動アーム
に軸支された押接輪を弾圧機構により押接することによ
り伝動する無端伝動装置において、 前記弾圧機構を前記回動アームに少なくとも左右2本の
スプリングを係止させるとともに、該両スプリングの他
端を機体フレームに設けた取付部に取付ピンを介して揺
動回動可能に枢支される取付片に、該取付ピンを中心に
天秤状に回動可能となるように係止させて構成した無端
伝動装置の弾圧機構。1. A pressurizing mechanism comprising a push-contact wheel axially supported by a rotating arm which stretches an endless belt between a drive wheel and a driven wheel and swings and rotates one side of the endless belt around a mounting shaft. In an endless transmission device that is transmitted by being pressed by, the at least two left and right springs are locked to the rotating arm of the elastic pressure mechanism, and the other ends of the both springs are attached to a mounting portion provided on a body frame. An elastic force mechanism for an endless transmission, comprising a mounting piece pivotally supported via a shaft so as to be pivotally movable around the mounting pin in a balance-like manner.
うち、該回動アームの取付軸側に係止させたスプリング
を他のスプリングよりもバネ定数を高くした強スプリン
グにするとともに、取付片に強スプリングの係止側への
回動を規制するストッパを設けた請求項1記載の無端伝
動装置の弾圧機構。2. Of both springs locked to the rotary arm, the spring locked to the mounting shaft side of the rotary arm is a strong spring having a higher spring constant than the other springs, and is mounted. The elastic force mechanism for an endless transmission according to claim 1, wherein a stopper for restricting rotation of the strong spring toward the locking side is provided on one piece.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22459794A JPH0893869A (en) | 1994-09-20 | 1994-09-20 | Springing pressure mechanism of endless transmission gear |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22459794A JPH0893869A (en) | 1994-09-20 | 1994-09-20 | Springing pressure mechanism of endless transmission gear |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0893869A true JPH0893869A (en) | 1996-04-12 |
Family
ID=16816225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22459794A Pending JPH0893869A (en) | 1994-09-20 | 1994-09-20 | Springing pressure mechanism of endless transmission gear |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0893869A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001088408A3 (en) * | 2000-05-17 | 2002-04-25 | Heidelberg Digital Llc | Dual spring tensioner |
JP2008215587A (en) * | 2007-03-07 | 2008-09-18 | Yanmar Co Ltd | Bearing device, pulley using the bearing device, belt tension adjusting device having the pulley, and combine having the belt tension adjusting device |
-
1994
- 1994-09-20 JP JP22459794A patent/JPH0893869A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001088408A3 (en) * | 2000-05-17 | 2002-04-25 | Heidelberg Digital Llc | Dual spring tensioner |
US7115056B2 (en) | 2000-05-17 | 2006-10-03 | Eastman Kodak Company | Dual spring tensioner |
JP2008215587A (en) * | 2007-03-07 | 2008-09-18 | Yanmar Co Ltd | Bearing device, pulley using the bearing device, belt tension adjusting device having the pulley, and combine having the belt tension adjusting device |
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