JP3757255B2 - Damper pulley for Rishorum compressor - Google Patents

Damper pulley for Rishorum compressor Download PDF

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Publication number
JP3757255B2
JP3757255B2 JP26373094A JP26373094A JP3757255B2 JP 3757255 B2 JP3757255 B2 JP 3757255B2 JP 26373094 A JP26373094 A JP 26373094A JP 26373094 A JP26373094 A JP 26373094A JP 3757255 B2 JP3757255 B2 JP 3757255B2
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JP
Japan
Prior art keywords
boss
pulley
input shaft
pulley body
compressor
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 - Fee Related
Application number
JP26373094A
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Japanese (ja)
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JPH08121362A (en
Inventor
茂 高部
嘉幸 宮城
徹 栗栖
靖典 神田
耕一 畑村
欣哉 岡島
一由 針本
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.)
NTN Corp
Mazda Motor Corp
Nok Corp
Original Assignee
NTN Corp
Mazda Motor Corp
Nok 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 NTN Corp, Mazda Motor Corp, Nok Corp filed Critical NTN Corp
Priority to JP26373094A priority Critical patent/JP3757255B2/en
Publication of JPH08121362A publication Critical patent/JPH08121362A/en
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Publication of JP3757255B2 publication Critical patent/JP3757255B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【0001】
【産業上の利用分野】
本発明は、リショルムコンプレッサの入力軸に回転動力を伝達するための、リショルムコンプレッサ用ダンパプーリに関するものである。
【0002】
【従来の技術】
図5及び図6はリショルムコンプレッサ23の概要を示すもので、周面に複数の螺旋状の山部1aを有する雄ロータ1と、周面に前記雄ロータ1の山部1aと噛み合う複数の螺旋状の谷部2aを有する雌ロータ2とを互いに噛み合わせた状態でケーシング3の内部に回転可能に収容し、前記雄ロータ1と雌ロータ2とを図5中の矢印R,R’方向に回転することにより、軸心方向の一端側から空気4を吸込み、この空気4を雄ロータ1と雌ロータ2との間で圧縮して、軸心方向の他端側から軸と直角方向に吐出させるようにしたものであり、前記雄ロータ1及び雌ロータ2は、図6に示すように軸心方向の両端部に突設した雄ロータ側軸5,6及び雌ロータ側軸7,8を軸受9,10及び軸受11,12を介してケーシング3に支持されている。
【0003】
ケーシング3の空気吸込み側とは反対側の図6における左側には、入力軸13が設けられており、この入力軸13の外側端部にダンパプーリ14が取り付けられている。
【0004】
入力軸13のダンパプーリ14側の端部は、プーリ側軸受15によって回転自在に支持されており、また入力軸13のケーシング3内側端部は、増速装置側軸受16によって回転自在に支持されている。
【0005】
前記ケーシング3内側端部と、前記雄ロータ側軸5及び雌ロータ側軸7との間には、増速装置17が配設されている。増速装置17は、入力軸13のケーシング3内側端部に固定された増速ギヤ18と、前記雌ロータ2の雌ロータ側軸7に固定されて前記増速ギヤ18に噛み合う増速ピニオン19と、この増速ピニオン19のボス部20に固定した雌ロータタイミングギヤ21と、雄ロータ側軸5に固定され前記雌ロータタイミングギヤ21と噛み合う雄ロータタイミングギヤ22とから構成されている。また、上述のダンパプーリ14はエンジンの出力軸にベルト24を介して連結され、エンジンの出力軸の回転を入力軸13に伝達するようになっている。
【0006】
ベルト24は図7に示すように、エンジンの出力軸に固定されているクランクプーリ25に掛け渡され、テンショナ26で張力が与えられ、上述のダンパプーリ14と共に他の補機に備えているプーリ(A)27、プーリ(B)28に回転を伝達するようになっている。
【0007】
【発明が解決しようとする課題】
クランクプーリ25はエンジンの出力軸によって回転されるアイドリング時のエンジン爆発周波数より低い周波数のトルク変動を含んでおり、更に他の補機の例えばプーリ(A)27でも振動による低い周波数のトルク変動を生じ、こうした低い周波数のトルク変動が、ベルト24からダンパプーリ14、入力軸13を介して増速装置17へ伝達されてしまうこととなり、増速装置17を構成するギヤの間にはバックラッシュが設けられていることから、アイドリング時のエンジン爆発周波数より低い周波数のトルク変動により増速装置17のギヤ同士が強く衝突して大きな歯打音を発生して、リショルムコンプレッサ23の円滑な運転を妨げる問題があった。
【0008】
そこで従来から、入力軸13とダンパプーリ14との間に、ゴム等の緩衝部材を介在させることも行われたが、十分に振動を防止することができなかった。
【0009】
本発明は、上述の実情に鑑み、ダンパプーリに生ずる微小な振動が入力軸に伝達されるのを防止し、リショルムコンプレッサの円滑な運転ができるようにしたリショルムコンプレッサ用ダンパプーリを提供することを目的とするものである。
【0010】
【課題を解決するための手段】
本発明のリショルムコンプレッサ用ダンパプーリは、リショルムコンプレッサの入力軸に一体に取り付けられるボスにニードルベアリングを介してプーリ本体を回転自在に外嵌し、前記ボスとプーリ本体とを変形復帰可能な緩衝部材で連結し、前記ボスとプーリ本体との間に仕切りリングを設け、前記ニードルベアリングのインナーレースに、仕切りリングに近い側の径を大きくした傾斜面を形成し、前記ニードルベアリングに、前記仕切りリングを押して前記ボスとプーリ本体とに当接させる推力を生じさせるようにしたことを特徴とするものである。
【0011】
【作用】
プーリ本体にエンジンの出力軸からの回転が伝達されると、プーリ本体から緩衝部材を介してボスに回転が伝達され、リショルムコンプレッサの入力軸を回転させる。
【0012】
ボスとプーリ本体とが回転することによってニードルベアリングに生ずる推力により、仕切りリングがボスとプーリ本体とに当接して仕切りリングとボス及びプーリ本体との間に摩擦力が発生し、この摩擦力により低い周波数の振動は減衰する。
【0013】
【実施例】
以下、本発明の実施例を図を参照しつつ説明する。
【0014】
図1は本発明の一実施例の断面図であって、段付き円筒状をしたボス30の小径部31の中心には入力軸嵌合孔32が設けられており、図6に示したリショルムコンプレッサ23の入力軸13の外側端部の外周に入力軸嵌合孔32が嵌められ、ボス30はリショルムコンプレッサ23の入力軸13に一体に取り付けられるようになっている。
【0015】
ボス30の大径部33の外周には、インナーレース34とアウターレース35とを備えたニードルベアリング36を介して、円筒状のプーリ本体37が回転自在に外嵌されていて、プーリ本体37の外側端部(図1において左端部)内周とボス30の小径部31外周との間を円盤状のゴムディスク等の緩衝部材38で連結している。
【0016】
またボス30における大径部33の外側端部(図1において左端側)の外周には、図3に示すように周方向に間隔をおいて複数の突部39を突設すると共に、プーリ本体37の対応する部分の内周には、周方向に間隔をおいて前記突部39を挟むように突部40が突設されている。
【0017】
前述したニードルベアリング36のインナーレース34外面は、外側端部側(突部39,40側)が若干大径になるような角αのテーパを有した傾斜面41になっており、アウターレース35の内面42は水平な円周面になっている。
【0018】
さらにボス30の大径部33外周とプーリ本体37の内周との間における突部39,40の内側端縁部とアウターレース35の外側(図1において左端側)端縁部との間には、若干の間隙をおいてリング状の仕切りリング43が設けられている。
【0019】
次に、上述した装置の作用を説明する。
【0020】
図6で説明したリショルムコンプレッサ23の入力軸13の外側端部に、図1で説明したボス30の小径部31の中心に設けられている入力軸嵌合孔32を図2に示すように外嵌し、キー44によってボス30を入力軸13に一体に取り付ける。そしてプーリ本体37の外周にはエンジンの出力軸の回転を伝達するベルト24を、従来と同様に掛け渡す。
【0021】
エンジンの出力軸の回転によりベルト24が駆動されるとプーリ本体37が回転し、円盤状のゴムディスク等の緩衝部材38を介してボス30が回転され、入力軸13が回転して従来と同様にリショルムコンプレッサの駆動が行われる。
【0022】
この際、ベルト24によって伝えられる動力のトルク変動の大部分は緩衝部材38が回転方向に撓むことによって吸収し、又大きなトルク変動及び大きな定トルクに対しては、ボス30とプーリ本体37との間に位相のずれが生じ、突部40が突部39に接することによって回転力の伝達が行われる。
【0023】
ボス30及びプーリ本体37間に相対な回転が生じると、その回転によりニードルベアリング36は矢印で示すようにインナーレース34の傾斜面41の大径側に移動する方向の推力を発生し、図2に示すようにニードルベアリング36はアウターレース35を介して、仕切りリング43をボス30の突部39及びプーリ本体37の突部40の各側面に当接させる。これによって仕切りリング43は、ボス30とプーリ本体37との間に摩擦力を与えることになる。
【0024】
ベルト24によって伝達されるトルク変動の内、高い周波数のトルク変動はゴムディスク等の緩衝部材38によって吸収され、アイドリング時のエンジン爆発周波数より低いような周波数のトルク変動は、仕切りリング43の当接によって生じた摩擦力によって吸収される。このため図4のグラフに実線で示すように、従来の場合を示す破線に比して共振点f0付近の振動の伝達率が低下されボス30に伝達される振動は減少するようになり、歯打音や共振が抑制されることになり、異音の発生が防止され、リショルムコンプレッサの円滑な運転が可能になる。
【0025】
【発明の効果】
本発明は、高い周波数のトルク変動は緩衝部材によって吸収され、アイドリング時のエンジン爆発周波数より低いような周波数のトルク変動は、仕切りリングがボスとプーリ本体とに当接することによって生ずるボスとプーリ本体との間の摩擦力によって吸収され、ボスに伝達される振動が減少して歯打音や共振が抑制されて異音の発生が防止され、リショルムコンプレッサの円滑な運転ができる効果がある。
【図面の簡単な説明】
【図1】本発明の一実施例の断面図である。
【図2】本発明の一実施例の作動状態を示す断面図である。
【図3】図1のIII−III断面図である。
【図4】振動特性を示すグラフである。
【図5】リショルムコンプレッサの要部を示す斜視図である。
【図6】リショルムコンプレッサの横断平面図である。
【図7】ベルトの伝導系統を示す正面図である。
【符号の説明】
13 入力軸
23 リショルムコンプレッサ
30 ボス
34 インナーレース
36 ニードルベアリング
37 プーリ本体
38 緩衝部材
43 仕切りリング
[0001]
[Industrial application fields]
The present invention relates to a damper pulley for a Rishorum compressor for transmitting rotational power to an input shaft of the Rishorum compressor.
[0002]
[Prior art]
5 and 6 show an outline of the Rishorum compressor 23, and a male rotor 1 having a plurality of spiral ridges 1a on the peripheral surface and a plurality of spirals meshing with the ridges 1a of the male rotor 1 on the peripheral surface. A female rotor 2 having a trough portion 2a meshed with each other is rotatably accommodated in the casing 3, and the male rotor 1 and the female rotor 2 are moved in the directions of arrows R and R 'in FIG. By rotating, the air 4 is sucked from one end side in the axial direction, the air 4 is compressed between the male rotor 1 and the female rotor 2, and discharged from the other end side in the axial direction in a direction perpendicular to the axis. As shown in FIG. 6, the male rotor 1 and the female rotor 2 are provided with male rotor side shafts 5 and 6 and female rotor side shafts 7 and 8 projecting from both ends in the axial direction. It is supported on the casing 3 via bearings 9 and 10 and bearings 11 and 12. .
[0003]
An input shaft 13 is provided on the left side in FIG. 6 opposite to the air suction side of the casing 3, and a damper pulley 14 is attached to an outer end portion of the input shaft 13.
[0004]
An end of the input shaft 13 on the damper pulley 14 side is rotatably supported by a pulley side bearing 15, and an inner end of the casing 3 of the input shaft 13 is rotatably supported by a speed increasing device side bearing 16. Yes.
[0005]
A speed increasing device 17 is disposed between the inner end portion of the casing 3 and the male rotor side shaft 5 and the female rotor side shaft 7. The speed increasing device 17 includes a speed increasing gear 18 fixed to the inner end of the casing 3 of the input shaft 13 and a speed increasing pinion 19 fixed to the female rotor side shaft 7 of the female rotor 2 and meshing with the speed increasing gear 18. And a female rotor timing gear 21 fixed to the boss portion 20 of the speed increasing pinion 19 and a male rotor timing gear 22 fixed to the male rotor side shaft 5 and meshing with the female rotor timing gear 21. The above-described damper pulley 14 is connected to the output shaft of the engine via a belt 24 and transmits the rotation of the output shaft of the engine to the input shaft 13.
[0006]
As shown in FIG. 7, the belt 24 is stretched over a crank pulley 25 fixed to the output shaft of the engine, is tensioned by a tensioner 26, and is provided with other pulleys together with the above-described damper pulley 14 ( A) The rotation is transmitted to 27 and the pulley (B) 28.
[0007]
[Problems to be solved by the invention]
The crank pulley 25 includes a torque fluctuation having a frequency lower than the engine explosion frequency at idling, which is rotated by the output shaft of the engine. Further, for example, the pulley (A) 27 of another auxiliary machine also exhibits a low frequency torque fluctuation due to vibration. As a result, such a low-frequency torque fluctuation is transmitted from the belt 24 to the speed increasing device 17 via the damper pulley 14 and the input shaft 13, and a backlash is provided between the gears constituting the speed increasing device 17. As a result, the gears of the speed increasing device 17 strongly collide with each other due to torque fluctuations at a frequency lower than the engine explosion frequency during idling, thereby generating a loud rattling noise and hindering the smooth operation of the Rishorum compressor 23. was there.
[0008]
Therefore, conventionally, a cushioning member such as rubber has been interposed between the input shaft 13 and the damper pulley 14, but it has not been possible to sufficiently prevent vibration.
[0009]
An object of the present invention is to provide a damper pulley for a Rishorum compressor that prevents a minute vibration generated in a damper pulley from being transmitted to an input shaft and enables a smooth operation of the Rorish compressor. To do.
[0010]
[Means for Solving the Problems]
The damper pulley for a Rishorum compressor of the present invention is a shock absorbing member that allows a pulley body to be rotatably fitted via a needle bearing to a boss that is integrally attached to an input shaft of the Rishorum compressor, and the boss and the pulley body can be deformed and restored. And a partition ring is provided between the boss and the pulley body, an inclined surface having a larger diameter near the partition ring is formed on the inner race of the needle bearing, and the partition ring is formed on the needle bearing. It is characterized in that a thrust force is generated to be pressed and brought into contact with the boss and the pulley body.
[0011]
[Action]
When the rotation from the output shaft of the engine is transmitted to the pulley body, the rotation is transmitted from the pulley body to the boss via the buffer member, and the input shaft of the Rishorum compressor is rotated.
[0012]
Due to the thrust generated in the needle bearing by the rotation of the boss and the pulley body, the partition ring comes into contact with the boss and the pulley body, and a frictional force is generated between the partition ring, the boss and the pulley body. Low frequency vibrations are damped.
[0013]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0014]
FIG. 1 is a cross-sectional view of an embodiment of the present invention, in which an input shaft fitting hole 32 is provided at the center of a small diameter portion 31 of a stepped cylindrical boss 30, which is shown in FIG. An input shaft fitting hole 32 is fitted on the outer periphery of the outer end portion of the input shaft 13 of the compressor 23, and the boss 30 is integrally attached to the input shaft 13 of the Rishorum compressor 23.
[0015]
A cylindrical pulley body 37 is rotatably fitted on the outer periphery of the large-diameter portion 33 of the boss 30 via a needle bearing 36 having an inner race 34 and an outer race 35. The inner periphery of the outer end (left end in FIG. 1) and the outer periphery of the small diameter portion 31 of the boss 30 are connected by a buffer member 38 such as a disk-shaped rubber disk.
[0016]
Further, as shown in FIG. 3, a plurality of protrusions 39 are provided on the outer periphery of the outer end portion (the left end side in FIG. 1) of the large-diameter portion 33 of the boss 30 at intervals in the circumferential direction. On the inner periphery of the corresponding portion of 37, a protrusion 40 is provided so as to sandwich the protrusion 39 with an interval in the circumferential direction.
[0017]
The outer surface of the inner race 34 of the needle bearing 36 described above is an inclined surface 41 having a taper of an angle α such that the outer end side (projection 39, 40 side) has a slightly larger diameter. The inner surface 42 is a horizontal circumferential surface.
[0018]
Further, between the inner edge of the protrusions 39 and 40 between the outer periphery of the large-diameter portion 33 of the boss 30 and the inner periphery of the pulley body 37 and the outer edge (left end side in FIG. 1) of the outer race 35. Is provided with a ring-shaped partition ring 43 with a slight gap.
[0019]
Next, the operation of the above-described apparatus will be described.
[0020]
An input shaft fitting hole 32 provided at the center of the small diameter portion 31 of the boss 30 described in FIG. 1 is formed on the outer end of the input shaft 13 of the Rishorum compressor 23 described in FIG. 6 as shown in FIG. The boss 30 is integrally attached to the input shaft 13 by the key 44. The belt 24 that transmits the rotation of the output shaft of the engine is wound around the outer periphery of the pulley body 37 in the same manner as in the prior art.
[0021]
When the belt 24 is driven by the rotation of the output shaft of the engine, the pulley body 37 is rotated, the boss 30 is rotated via the buffer member 38 such as a disk-shaped rubber disk, and the input shaft 13 is rotated, which is the same as the conventional one. The Rishorum compressor is driven.
[0022]
At this time, most of the torque fluctuation of the power transmitted by the belt 24 is absorbed by the buffer member 38 being bent in the rotational direction, and for the large torque fluctuation and the large constant torque, the boss 30 and the pulley body 37 During this time, a phase shift occurs, and the projecting portion 40 comes into contact with the projecting portion 39 to transmit the rotational force.
[0023]
When relative rotation occurs between the boss 30 and the pulley main body 37, the needle bearing 36 generates a thrust force in the direction of moving toward the large diameter side of the inclined surface 41 of the inner race 34 as shown by the arrow in FIG. 2, the needle bearing 36 causes the partition ring 43 to abut on the side surfaces of the protrusion 39 of the boss 30 and the protrusion 40 of the pulley body 37 via the outer race 35. As a result, the partition ring 43 gives a frictional force between the boss 30 and the pulley body 37.
[0024]
Among torque fluctuations transmitted by the belt 24, high-frequency torque fluctuations are absorbed by the buffer member 38 such as a rubber disk, and torque fluctuations having a frequency lower than the engine explosion frequency during idling are brought into contact with the partition ring 43. It is absorbed by the frictional force generated by Therefore, as shown by the solid line in the graph of FIG. 4, the transmission rate of the vibration near the resonance point f 0 is lowered and the vibration transmitted to the boss 30 is reduced as compared with the broken line indicating the conventional case. The rattling noise and resonance are suppressed, the generation of abnormal noise is prevented, and the Rishorum compressor can be operated smoothly.
[0025]
【The invention's effect】
In the present invention, high frequency torque fluctuations are absorbed by the buffer member, and torque fluctuations at frequencies lower than the engine explosion frequency during idling are caused by the partition ring coming into contact with the boss and the pulley body. The vibration transmitted to the boss is reduced and the vibration transmitted to the boss is reduced, the rattling noise and resonance are suppressed, and the generation of abnormal noise is prevented, and the Rishorum compressor can be smoothly operated.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing an operating state of an embodiment of the present invention.
3 is a cross-sectional view taken along the line III-III in FIG.
FIG. 4 is a graph showing vibration characteristics.
FIG. 5 is a perspective view showing a main part of the Rishorum compressor.
FIG. 6 is a cross-sectional plan view of a Rishorum compressor.
FIG. 7 is a front view showing a belt conduction system;
[Explanation of symbols]
13 Input shaft 23 Rishorum compressor 30 Boss 34 Inner race 36 Needle bearing 37 Pulley body 38 Buffer member 43 Partition ring

Claims (1)

リショルムコンプレッサの入力軸に一体に取り付けられるボスにニードルベアリングを介してプーリ本体を回転自在に外嵌し、前記ボスとプーリ本体とを変形復帰可能な緩衝部材で連結し、前記ボスとプーリ本体との間に仕切りリングを設け、前記ニードルベアリングのインナーレースに、仕切りリングに近い側の径を大きくした傾斜面を形成し、前記ニードルベアリングに、前記仕切りリングを押して前記ボスとプーリ本体とに当接させる推力を生じさせるようにしたことを特徴とするリショルムコンプレッサ用ダンパプーリ。A pulley body is rotatably fitted through a needle bearing to a boss that is integrally attached to the input shaft of the Rishorum compressor, and the boss and the pulley body are connected by a buffer member that can be deformed and restored. A partition ring is provided between the inner race of the needle bearing, and an inclined surface having a larger diameter near the partition ring is formed on the inner race of the needle bearing, and the partition ring is pressed against the boss and the pulley body on the needle bearing. A damper pulley for a Rishorum compressor, characterized in that a thrust force to contact is generated.
JP26373094A 1994-10-27 1994-10-27 Damper pulley for Rishorum compressor Expired - Fee Related JP3757255B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26373094A JP3757255B2 (en) 1994-10-27 1994-10-27 Damper pulley for Rishorum compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26373094A JP3757255B2 (en) 1994-10-27 1994-10-27 Damper pulley for Rishorum compressor

Publications (2)

Publication Number Publication Date
JPH08121362A JPH08121362A (en) 1996-05-14
JP3757255B2 true JP3757255B2 (en) 2006-03-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP26373094A Expired - Fee Related JP3757255B2 (en) 1994-10-27 1994-10-27 Damper pulley for Rishorum compressor

Country Status (1)

Country Link
JP (1) JP3757255B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4103498B2 (en) * 2002-08-23 2008-06-18 株式会社デンソー Power transmission device and torque transmission member

Also Published As

Publication number Publication date
JPH08121362A (en) 1996-05-14

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