JP2003139156A - Rotor assembly and fastening mechanism thereof - Google Patents
Rotor assembly and fastening mechanism thereofInfo
- Publication number
- JP2003139156A JP2003139156A JP2001338907A JP2001338907A JP2003139156A JP 2003139156 A JP2003139156 A JP 2003139156A JP 2001338907 A JP2001338907 A JP 2001338907A JP 2001338907 A JP2001338907 A JP 2001338907A JP 2003139156 A JP2003139156 A JP 2003139156A
- Authority
- JP
- Japan
- Prior art keywords
- collar
- taper
- rotary shaft
- boss
- impeller
- 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
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は組立回転体およびそ
の締結機構に関する。さらに詳しくは、たとえば過給機
や送風機のような回転体としての羽根車とその回転軸と
の組立体など（組立回転体）と、その回転体と回転軸と
の締結機構に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary assembly and a fastening mechanism therefor. More specifically, the present invention relates to an assembly of an impeller and a rotating shaft thereof as a rotating body such as a supercharger or a blower (an assembled rotating body), and a fastening mechanism between the rotating body and the rotating shaft.
【０００２】[0002]
【従来の技術および発明が解決しようとする課題】従来
の羽根車の組立体およびその締結機構としては、たとえ
ば特開平９−２７３５６４に開示されたものが知られて
いる。図４に示すように、この羽根車の組立体は、中心
にボス部５２を有する羽根車５１と、ボス部５２に貫入
する回転軸５３とを備えている。回転軸５３はその外周
に段部５４を有する段付き棒である。羽根車５１はその
ボス部５２の一端側がブッシュ５５を介して上記段部５
４に当接し、ボス部５２の他端側は回転軸５３に螺合さ
れたナット５６によって締め付けられる。こうすること
により、羽根車５１は回転軸５３の軸方向の挟圧力によ
って回転軸５３に固定されている。2. Description of the Related Art As a conventional impeller assembly and its fastening mechanism, the one disclosed in, for example, JP-A-9-273564 is known. As shown in FIG. 4, this impeller assembly includes an impeller 51 having a boss portion 52 at the center, and a rotary shaft 53 penetrating the boss portion 52. The rotary shaft 53 is a stepped rod having a step portion 54 on its outer circumference. In the impeller 51, one end side of a boss portion 52 of the impeller 51 is provided with a bush 55, and
4, and the other end of the boss portion 52 is tightened by a nut 56 screwed to the rotating shaft 53. By doing so, the impeller 51 is fixed to the rotary shaft 53 by the clamping force of the rotary shaft 53 in the axial direction.
【０００３】一方、羽根車５１にはその回転によって遠
心力が発生する。また、流体との摩擦や流体の圧縮など
によって回転軸５３を含めた組立体全体の温度が上昇す
る。遠心力によって羽根車のボス部５２の内径側が拡大
し、回転軸５３の外周面とブッシュ５５の内周面との
間、または、ブッシュ５５の外周面とボス部５２の内周
面との間にスキマが生じる。その結果、回転中に羽根車
５１と回転軸５３との同心状がくずれる、いわゆる芯ぶ
れを起こすおそれがある。また、羽根車５１に比べて回
転軸５３の熱膨張係数が大きい場合、上記段部５４とナ
ット５６との離間距離が拡大し、羽根車５１に対する締
結力が低下するおそれもある。On the other hand, centrifugal force is generated in the impeller 51 by its rotation. Further, the temperature of the entire assembly including the rotating shaft 53 rises due to friction with the fluid, compression of the fluid, and the like. Due to the centrifugal force, the inner diameter side of the boss portion 52 of the impeller expands, and between the outer peripheral surface of the rotating shaft 53 and the inner peripheral surface of the bush 55, or between the outer peripheral surface of the bush 55 and the inner peripheral surface of the boss portion 52. A gap occurs in the. As a result, the concentric shape of the impeller 51 and the rotating shaft 53 may be broken during rotation, that is, so-called misalignment may occur. Further, when the coefficient of thermal expansion of the rotary shaft 53 is larger than that of the impeller 51, the distance between the step portion 54 and the nut 56 may increase, and the fastening force for the impeller 51 may decrease.
【０００４】本発明は如上の課題を解決するためになさ
れたものであり、簡易な構成によって羽根車等の回転体
の回転軸に対する芯ぶれを効果的に防止し、締結力の低
下も防止しうる組立回転体およびその締結機構を提供す
ることを目的としている。The present invention has been made in order to solve the above problems, and it is possible to effectively prevent center deviation of a rotating body such as an impeller with respect to a rotating shaft with a simple structure and prevent a decrease in fastening force. It is an object of the present invention to provide a rotatable assembly and a fastening mechanism therefor.
【０００５】[0005]
【課題を解決するための手段】本発明の回転組立体の締
結機構は、その中心にボス部を有する回転体と、該ボス
部に貫入した回転軸とを、回転軸の軸方向の挟圧力によ
って締結するための締結機構であって、上記ボス部の少
なくとも一方の端部の外周面に形成された円錐状の第一
テーパ部と、上記回転軸の外周に配設された、その内周
面に上記第一テーパ部と対応する第二テーパ部を有する
カラー部とを備えており、第一テーパ部と第二テーパ部
とが当接し得るように構成されてなることを特徴として
いる。According to the fastening mechanism of a rotary assembly of the present invention, a rotary body having a boss portion at its center and a rotary shaft penetrating into the boss portion are clamped in the axial direction of the rotary shaft. A conical first taper portion formed on an outer peripheral surface of at least one end of the boss portion, and an inner periphery of the conical first taper portion arranged on the outer periphery of the rotary shaft. The surface is provided with a collar portion having a second taper portion corresponding to the first taper portion, and is characterized in that the first taper portion and the second taper portion can be brought into contact with each other.
【０００６】かかる構成によれば、回転時に回転体に発
生した遠心力や熱膨張によってボス部が半径方向に拡大
するように撓み、回転軸の外周面との間にスキマが生じ
る可能性がある。しかし、第一テーパ部と第二テーパ部
とが当接するので、ボス部は第二テーパ部によって回転
軸との同心状態が確保される。また、回転軸の熱膨張係
数が回転体の熱膨張係数より大きい場合、回転に伴う温
度上昇時に熱膨張差によって回転体を締結する力が低下
するおそれがある。しかし、上記のとおり回転に伴って
第一テーパ部と第二テーパ部とが当接するので、回転体
にはカラー部の第二テーパ部から第一テーパ部を介して
軸方向反力成分が加わるため、締結力の低下が回避され
る。According to this structure, the boss portion may flex so as to expand in the radial direction due to the centrifugal force or the thermal expansion generated in the rotating body at the time of rotation, and a gap may occur between the boss portion and the outer peripheral surface of the rotating shaft. . However, since the first taper portion and the second taper portion are in contact with each other, the boss portion is ensured to be concentric with the rotation shaft by the second taper portion. When the coefficient of thermal expansion of the rotating shaft is larger than that of the rotating body, the force for fastening the rotating body may decrease due to the difference in thermal expansion when the temperature rises due to the rotation. However, as described above, the first taper portion and the second taper portion come into contact with each other with the rotation, so that an axial reaction force component is applied to the rotating body from the second taper portion of the collar through the first taper portion. Therefore, a decrease in fastening force is avoided.
【０００７】そして、上記カラー部が回転軸の軸方向に
取り外し可能に配設されてなる締結機構にあっては、カ
ラー部の交換を含めたメンテナンスが容易となる。さら
に、カラー部として熱膨張係数の異なる材料を選択する
ことができるので、上記同心状態の確保および締結力低
下の防止を一層効果的に行うことができる。Further, in the fastening mechanism in which the collar portion is detachably arranged in the axial direction of the rotary shaft, maintenance including replacement of the collar portion can be facilitated. Furthermore, since materials having different thermal expansion coefficients can be selected for the collar portion, it is possible to more effectively ensure the concentric state and prevent the fastening force from decreasing.
【０００８】また、上記ボス部の両端部に第一テーパ部
が形成されており、各第一テーパ部に対応するカラー部
が回転軸にそれぞれ配設されており、少なくとも一方の
カラー部が回転軸に着脱自在にされてなる締結機構にあ
っては、ボス部の両端ともに第一テーパ部を介して同心
状態の確保および締結力低下の防止のための力が加えら
れるので好ましい。Further, first taper portions are formed at both ends of the boss portion, and collar portions corresponding to the respective first taper portions are respectively arranged on the rotary shaft, and at least one collar portion is rotated. A fastening mechanism that is detachably attached to the shaft is preferable because both ends of the boss portion are applied with a force for securing a concentric state and preventing a reduction in fastening force through the first tapered portion.
【０００９】本発明の回転組立体は、その中心にボス部
を有する回転体と、該ボス部に貫入した、上記回転体と
の間で回転力を伝達する回転軸と、上記ボス部の少なく
とも一方の端部の外周面に形成された円錐状の第一テー
パ部と、上記回転軸の外周に配設された、その内周面に
上記第一テーパ部と対応する第二テーパ部を有するカラ
ー部と、上記第一テーパ部と第二テーパ部とが押圧しあ
うように、回転体およびカラー部のいずれか一方を他方
に向けて付勢する付勢装置とを備えている。In the rotating assembly of the present invention, at least the rotating body having a boss portion at the center thereof, the rotating shaft penetrating into the boss portion for transmitting a rotating force between the rotating body and the boss portion. A conical first taper portion formed on the outer peripheral surface of one end portion, and a second taper portion corresponding to the first taper portion on the inner peripheral surface disposed on the outer periphery of the rotating shaft. A collar portion and an urging device that urges one of the rotating body and the collar portion toward the other so that the first taper portion and the second taper portion press each other.
【００１０】かかる構成により、前述した回転体の同心
状態の確保および締結力低下の防止という作用効果が得
られる。なお、付勢装置としては、ナット、ラジアルキ
ーとナットとの組み合わせ、焼嵌めなどを採用すること
ができる。With this structure, the above-described operational effects of securing the concentric state of the rotating body and preventing the fastening force from decreasing can be obtained. As the urging device, a nut, a combination of a radial key and a nut, shrink fitting, or the like can be adopted.
【００１１】そして、少なくとも一方のカラー部が回転
軸の軸方向に取り外し可能に配設されており、該カラー
部の反回転体側に、カラー部が反回転体側に変位するこ
とを規制する固定部材が配設されてなる組立回転体にあ
っては、前述したと同様に、カラー部の材料として熱膨
張係数の異なる材料を選択することができるので好まし
い。At least one of the collar portions is detachably arranged in the axial direction of the rotary shaft, and a fixing member for restricting the collar portion from displacing to the anti-rotation body side on the anti-rotation body side. In the assembled rotary body in which is disposed, as described above, it is possible to select materials having different thermal expansion coefficients as the material of the collar portion, which is preferable.
【００１２】また、ナットなどの上記付勢装置を固定部
材として兼用することが可能である。The biasing device such as a nut can also be used as a fixing member.
【００１３】[0013]
【発明の実施の形態】以下、添付図面を参照しつつ本発
明の組立回転体およびその締結機構の実施形態を説明す
る。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the assembled rotating body and the fastening mechanism thereof according to the present invention will be described below with reference to the accompanying drawings.
【００１４】図１（ａ）は本発明の回転組立体の一実施
形態を概略的に示す一部切欠き側面図であり、図１
（ｂ）は組立前の一部切欠き側面図である。FIG. 1 (a) is a partially cutaway side view schematically showing an embodiment of the rotating assembly of the present invention.
(B) is a partially cutaway side view before assembly.
【００１５】図１に示す回転組立体１００は、回転体と
しての送風機の羽根車１と、この羽根車１に回転を伝え
る回転軸２との組立体を例にとっている。もちろん、本
発明はかかる対象に限定されず、他の回転組立体にも適
用可能である。さらに、回転体から回転軸に回転を伝達
する組立体にも適用可能である。The rotating assembly 100 shown in FIG. 1 is an example of an assembly of an impeller 1 of a blower as a rotating body and a rotary shaft 2 for transmitting rotation to the impeller 1. Of course, the present invention is not limited to such an object and can be applied to other rotary assemblies. Further, it can be applied to an assembly for transmitting rotation from a rotating body to a rotating shaft.
【００１６】羽根車１はその中心にボス部３が形成さ
れ、ボス部から放射状に複数枚の羽根４が形成されたも
のである。回転軸２はボス部３の貫通孔５に貫入されて
いる。回転軸２の外周には回転軸２より大径のカラー部
６が回転軸２に一体に形成されている。もちろん、別体
のカラー部材を公知の手段によって回転軸２に固定して
もよい。カラー部６に対向するボス部３の端部（これを
一方の端部という）には貫通孔５の中心軸に垂直な第一
端面７が形成され、外周には貫通孔５と同心状に円錐状
の第一テーパ部８が形成されている。The impeller 1 has a boss portion 3 formed in the center thereof and a plurality of blades 4 formed radially from the boss portion. The rotary shaft 2 penetrates the through hole 5 of the boss portion 3. A collar portion 6 having a diameter larger than that of the rotary shaft 2 is integrally formed on the outer circumference of the rotary shaft 2. Of course, a separate collar member may be fixed to the rotary shaft 2 by a known means. A first end face 7 perpendicular to the central axis of the through hole 5 is formed at the end of the boss portion 3 facing the collar portion 6 (this is referred to as one end portion), and the outer periphery is concentric with the through hole 5. A conical first taper portion 8 is formed.
【００１７】ボス部３に対向するカラー部６の端部には
回転軸２と同心状のリング状の凹所９が形成されてい
る。この凹所９の内周面は回転軸と同心状に、上記第一
テーパ部８と相補的な円錐状の第二テーパ部１０が形成
されている。すなわち、第一テーパ部８の面と第二テー
パ部１０の面とは当接し合う。図では理解容易のために
わずかに離間させて図示している。また、凹所９の奥端
部には上記端面７と対向するように回転軸２の中心軸に
垂直な底面１１が形成されている。また、カラー部６の
羽根車側の端部には羽根車１の背面に当接しうる当接面
１２が形成されている。A ring-shaped recess 9 concentric with the rotary shaft 2 is formed at the end of the collar portion 6 facing the boss portion 3. An inner peripheral surface of the recess 9 is formed with a conical second taper portion 10 that is complementary to the first taper portion 8 concentrically with the rotation axis. That is, the surface of the first taper portion 8 and the surface of the second taper portion 10 are in contact with each other. In the figure, they are shown separated from each other for easy understanding. Further, a bottom surface 11 perpendicular to the central axis of the rotary shaft 2 is formed at the rear end of the recess 9 so as to face the end surface 7. Further, a contact surface 12 that can contact the back surface of the impeller 1 is formed at the end of the collar portion 6 on the impeller side.
【００１８】回転軸２の先端からは回転軸に形成された
ねじ１３に締結用のナット１４が螺合している。ボス部
３の他方の端部にはナット１４が当接する当接面１５が
形成されている。貫通孔５の内周面および回転軸２の外
周面にはキー溝１６ａ、１６ｂが形成されており、ここ
にはトルク伝達のために羽根車１と回転軸２とを回転方
向に固定するキー１７が挿入される。そして上記ナット
１４を締め込むことによってナット１４とカラー部６と
で羽根車１を挟圧して回転軸２に固定するようにされて
いる。このとき、第一テーパ部８と第二テーパ部１０と
は当接するようにされている。これによって回転軸方向
の位置決め、および羽根車（ボス部）と回転軸との調心
がなされる。From the tip of the rotary shaft 2, a fastening nut 14 is screwed into a screw 13 formed on the rotary shaft. A contact surface 15 with which the nut 14 abuts is formed at the other end of the boss portion 3. Key grooves 16a, 16b are formed on the inner peripheral surface of the through hole 5 and the outer peripheral surface of the rotary shaft 2, and a key for fixing the impeller 1 and the rotary shaft 2 in the rotational direction for torque transmission is formed here. 17 is inserted. Then, by tightening the nut 14, the impeller 1 is pinched by the nut 14 and the collar portion 6 and fixed to the rotating shaft 2. At this time, the 1st taper part 8 and the 2nd taper part 10 are made to contact. As a result, positioning in the rotation axis direction and alignment of the impeller (boss portion) and the rotation axis are performed.
【００１９】この状態で回転軸２を回転させると羽根車
１に発生した遠心力によってボス部３が半径方向に（放
射状に）拡大するように撓み、回転軸２の外周面との間
にスキマが生じる可能性がある。しかし、前述のとおり
第一テーパ部８と第二テーパ部１０とが当接するので、
ボス部３はカラー部６の第二テーパ部１０によって回転
軸との同心状態が確保される。したがって芯ぶれを起こ
す心配がない。When the rotary shaft 2 is rotated in this state, the centrifugal force generated in the impeller 1 causes the boss portion 3 to flex so as to expand in the radial direction (radially), and a gap is generated between the rotary shaft 2 and the outer peripheral surface thereof. May occur. However, as described above, since the first taper portion 8 and the second taper portion 10 contact each other,
The second taper portion 10 of the collar portion 6 ensures that the boss portion 3 is concentric with the rotating shaft. Therefore, there is no need to worry about run-out.
【００２０】一方、回転軸２の熱膨張係数が羽根車１の
熱膨張係数より大きい場合、回転に伴う回転組立体の温
度上昇によって上記遠心力によるスキマは緩和される。
すなわち、熱膨張はスキマが小さくなる方向に作用す
る。しかし、回転軸２の軸方向についてはナット１４と
カラー部６との間が、ボス部３より大きく膨張するた
め、羽根車を締結する力が低下するおそれがある。しか
し、上記遠心力によって第一テーパ部８と第二テーパ部
１０とが当接するので、羽根車１にはカラー部６の第二
テーパ部１０から第一テーパ部８を介して軸方向反力成
分が加わるため、締結力の低下が回避される。逆に、回
転軸２の熱膨張係数が羽根車１の熱膨張係数より小さい
場合でも、第一テーパ部８と第二テーパ部１０との当接
によって羽根車１の回転軸２に対する同心状態は確保さ
れ、締結力の低下も防止される。On the other hand, when the coefficient of thermal expansion of the rotary shaft 2 is larger than that of the impeller 1, the skimmer caused by the centrifugal force is alleviated due to the temperature rise of the rotary assembly due to the rotation.
That is, the thermal expansion acts in the direction of reducing the clearance. However, in the axial direction of the rotary shaft 2, the space between the nut 14 and the collar portion 6 expands more than the boss portion 3, so that the force for fastening the impeller may decrease. However, the centrifugal force causes the first taper portion 8 and the second taper portion 10 to come into contact with each other, so that the impeller 1 receives an axial reaction force from the second taper portion 10 of the collar portion 6 via the first taper portion 8. Since the components are added, a decrease in fastening force is avoided. On the contrary, even when the coefficient of thermal expansion of the rotating shaft 2 is smaller than that of the impeller 1, the contact between the first tapered portion 8 and the second tapered portion 10 causes the impeller 1 to be concentric with the rotating shaft 2. As a result, the fastening force is prevented from being lowered.
【００２１】図２には着脱自在のカラー部材２６を備え
た回転組立体１１０が示されている。この回転組立体１
１０は図１の回転組立体１００におけるカラー部６をカ
ラー部材２６に変え、回転軸２２に鍔部２７を形成した
点が上記回転組立体１００と異なる。そして、羽根車２
１の一部形状が異なる。その他は図１の回転組立体１０
０と同じ構造である。したがって、図１の回転組立体１
００と対応する同一部分には同一符号を付記してその詳
細な説明は省略する。FIG. 2 shows a rotary assembly 110 having a detachable collar member 26. This rotating assembly 1
10 differs from the above rotary assembly 100 in that the collar portion 6 of the rotary assembly 100 of FIG. 1 is replaced with a collar member 26 and a collar portion 27 is formed on the rotary shaft 22. And impeller 2
Part 1 is different in shape. Others are the rotation assembly 10 of FIG.
It has the same structure as 0. Therefore, the rotation assembly 1 of FIG.
The same parts corresponding to 00 are denoted by the same reference numerals, and detailed description thereof will be omitted.
【００２２】羽根車２１の形状構造は図１の羽根車１の
それとほとんど同じである。ただ、ボス部２３の先端に
は当接用の端面は形成されていない。その他は上記羽根
車１と同じ構造である。たとえばそのボス部２３の端部
の外周面には第一テーパ部８が形成されており、ナット
１４によって締結される。The shape structure of the impeller 21 is almost the same as that of the impeller 1 of FIG. However, an end surface for contact is not formed at the tip of the boss portion 23. The other structure is the same as that of the impeller 1. For example, the first tapered portion 8 is formed on the outer peripheral surface of the end portion of the boss portion 23 and is fastened by the nut 14.
【００２３】カラー部材２６はその中心に回転軸２２が
貫入する貫通孔２５を有するリング状を呈した部材であ
り、回転軸２２の軸方向に滑らせて着脱できるようにさ
れている。ボス部３に対向するカラー部材２６の端部に
は回転軸２２と同心状のリング状の凹所２９が形成され
ている。この凹所２９の内周面は回転軸と同心状に、上
記第一テーパ部８と相補的な円錐状の第二テーパ部１０
が形成されている。また、第二テーパ部１０の中心寄り
（凹所２９の奥端部）にはボス部２３の先端と干渉しな
いようにいわゆるヌスミ２９ａが形成されている。The collar member 26 is a ring-shaped member having a through hole 25 through which the rotary shaft 22 penetrates, and is slidable in the axial direction of the rotary shaft 22 so as to be detachable. A ring-shaped recess 29 concentric with the rotating shaft 22 is formed at the end of the collar member 26 facing the boss 3. The inner peripheral surface of the recess 29 is concentric with the rotating shaft, and is a conical second tapered portion 10 complementary to the first tapered portion 8.
Are formed. Further, a so-called slime 29 a is formed near the center of the second taper portion 10 (the rear end portion of the recess 29) so as not to interfere with the tip of the boss portion 23.
【００２４】回転軸２２の外周には鍔部２７が形成され
ている。回転軸２２にカラー部材２６が嵌挿されたとき
に、この鍔部２７にカラー部材２６の背面が当接する。
こうすることにより、ナット１４を締め込めばカラー部
材２６は羽根車２１と鍔部２７とでされて固定状態とな
る。本回転組立体１１０においても第一テーパ部８と第
二テーパ部１０とが当接するので、その遠心力や熱膨張
の発生に拘わらず、羽根車２１の回転軸２２に対する同
心状態は確保され、締結力の低下も防止される。また、
このようにカラー部を着脱自在にすることにより、カラ
ー部材の材質として回転軸の熱膨張係数より大きい熱膨
張係数を有するものを選択することができる。こうすれ
ば、回転軸の熱膨張係数が羽根車の熱膨張係数より大き
い場合であっても、羽根車の同心状態の確保および締結
力の低下が一層効果的に防止される。A collar portion 27 is formed on the outer periphery of the rotary shaft 22. When the collar member 26 is fitted into the rotary shaft 22, the back surface of the collar member 26 contacts the collar portion 27.
By doing so, when the nut 14 is tightened, the collar member 26 is fixed by the impeller 21 and the collar portion 27. In the present rotary assembly 110 as well, the first taper portion 8 and the second taper portion 10 are in contact with each other, so that the concentric state of the impeller 21 with respect to the rotation shaft 22 is secured regardless of the centrifugal force and the thermal expansion. A reduction in fastening force is also prevented. Also,
By detachable Thus the collar, color
-The material of the member has a thermal expansion coefficient larger than that of the rotary shaft.
It is possible to select one having a tension coefficient. This way
For example, the coefficient of thermal expansion of the rotating shaft is larger than that of the impeller.
Even if it is not, secure and fasten the concentric state of the impeller
The decrease in force is prevented more effectively .
【００２５】図３にはボス部３３の両端部それぞれに第
一テーパ部８ａ、８ｂが形成された羽根車３１を備えた
回転組立体１２０が示されている。この回転組立体１２
０の回転軸３２には、上記ボス部３３の一方の第一テー
パ部（図中の右側の第一テーパ部）８ａに対応してカラ
ー部３６ａが回転軸３２と一体に形成されており、他方
の第一テーパ部（図中の左側の第一テーパ部）８ｂに対
応して着脱自在のカラー部材３６ｂが外嵌されている。
右側のカラー部３６ａは図１に示すカラー部６と同一の
形状構造を有しているので、図１のカラー部６と対応す
る同一部分には同一符号を付記してその詳細な説明は省
略する。一方、左側のカラー部材３６ｂは図２に示すカ
ラー部材２６と逆向きに装着されてはいるが、同一の形
状構造を有しているので、図２のカラー部材２６と対応
する同一部分には同一符号を付記してその詳細な説明は
省略する。しかし、重要なことは、ボス部３３の一方の
第一テーパ部８ａはカラー部３６ａの第二テーパ部１０
と当接し、他方の第一テーパ部８ｂはカラー部材３６ｂ
の第二テーパ部１０と当接するということである。そし
て、図示のごとくカラー部材３６ｂの背面には回転軸３
２に螺着された締結用のナット１４が当接する。FIG. 3 shows a rotary assembly 120 having an impeller 31 having first tapered portions 8a and 8b formed at both ends of a boss portion 33, respectively. This rotating assembly 12
On the rotary shaft 32 of 0, a collar portion 36a is integrally formed with the rotary shaft 32 in correspondence with one first tapered portion (first tapered portion on the right side in the drawing) 8a of the boss portion 33, A detachable collar member 36b is externally fitted to correspond to the other first tapered portion (first tapered portion on the left side in the drawing) 8b.
Since the collar portion 36a on the right side has the same shape and structure as the collar portion 6 shown in FIG. 1, the same portions corresponding to the collar portion 6 in FIG. 1 are designated by the same reference numerals and detailed description thereof is omitted. To do. On the other hand, the collar member 36b on the left side is mounted in the opposite direction to the collar member 26 shown in FIG. 2, but since it has the same shape structure, the same portion corresponding to the collar member 26 of FIG. The same reference numerals are given and detailed description thereof is omitted. However, it is important to note that the one first taper portion 8a of the boss portion 33 is connected to the second taper portion 10 of the collar portion 36a.
And the other first taper portion 8b has a collar member 36b.
That is, the second taper portion 10 comes into contact with the second taper portion 10. Then, as shown in the figure, the rotary shaft 3 is provided on the back surface of the collar member 36b.
The fastening nut 14 screwed to the screw 2 abuts.
【００２６】ボス部３３の右側端部には上記第一テーパ
部８ａとともにその先端にカラー部３６ａの底面１１と
対応する端面７が形成されている。このように、ボス部
３３の右側端部は図１におけるボス部の右側端部と同一
の形状構造を有している。At the right end of the boss portion 33, the end surface 7 corresponding to the bottom surface 11 of the collar portion 36a is formed along with the first taper portion 8a. As described above, the right end portion of the boss portion 33 has the same shape structure as the right end portion of the boss portion in FIG.
【００２７】ボス部３３の左側端部には前述のとおり第
一テーパ部８ｂが形成されている。さらに、ボス部３３
の左側端部およびこれに対応する回転軸３２の部分それ
ぞれにキー１７が挿入されるキー溝１６ａ、１６ｂが形
成されている。このように、ボス部３３の左側端部はそ
のキー溝１６ａを除けば図１におけるボス部の左側端部
と同一の形状構造を有している。The first taper portion 8b is formed on the left end of the boss portion 33 as described above. Furthermore, the boss 33
Key grooves 16a and 16b into which the key 17 is inserted are formed at the left end and the corresponding portion of the rotary shaft 32. Thus, the left end of the boss 33 has the same shape and structure as the left end of the boss in FIG. 1 except for the key groove 16a.
【００２８】本回転組立体１２０では、回転時にボス部
３３の両端ともに第二テーパ部１０から軸方向の反力成
分が加わるので、一層効果的に羽根車３１の同心状態が
確保され、締結力の低下も防止される。In the rotary assembly 120, the reaction force component in the axial direction is applied from the second taper portion 10 to both ends of the boss portion 33 during rotation, so that the concentric state of the impeller 31 is more effectively secured and the fastening force is increased. Is also prevented.
【００２９】図３に示す回転組立体１２０では、一方を
固定のカラー部３６ａとし、他方を着脱可能なカラー部
材３６ｂとしたが、本発明ではかかる構成限定されな
い。左右いずれも着脱式のカラー部材としてもよい。こ
の場合、図中右側のカラー部３６ａに代えて図２に示す
カラー部材２６と鍔部２７を採用することになる。In the rotary assembly 120 shown in FIG. 3, one is the fixed collar portion 36a and the other is the detachable collar member 36b, but the present invention is not limited to this. Both the left and right sides may be detachable collar members. In this case, the collar member 26 and the collar portion 27 shown in FIG. 2 are adopted instead of the collar portion 36a on the right side in the figure.
【００３０】以上説明した実施形態において、回転軸と
は別体のカラー部材を用いる場合、カラー部材の材質と
して回転軸の熱膨張係数より大きい熱膨張係数を有する
ものを選択することができる。こうすれば、回転軸の熱
膨張係数が羽根車の熱膨張係数より大きい場合であって
も、羽根車の同心状態の確保および締結力の低下が一層
効果的に防止される。In the embodiment described above, when a collar member separate from the rotary shaft is used, a material having a thermal expansion coefficient larger than that of the rotary shaft can be selected as the material of the collar member. With this configuration, even when the coefficient of thermal expansion of the rotary shaft is larger than that of the impeller, the concentric state of the impeller and the reduction of the fastening force are more effectively prevented.
【００３１】本発明では、回転軸の直径およびボス部の
貫通孔の直径はともに軸方向に一定値とすることには限
定されない、回転軸もボス部の貫通孔もともにテーパ状
にしたテーパーフィットとしてもよい。In the present invention, the diameter of the rotary shaft and the diameter of the through hole of the boss are not limited to constant values in the axial direction, and both the rotary shaft and the through hole of the boss are tapered. May be
【００３２】[0032]
【発明の効果】本発明によれば、羽根車等の回転体の回
転軸に対する芯ぶれを効果的に防止することができ、し
かも、回転体の回転軸への締結力の低下も防止すること
ができる。According to the present invention, it is possible to effectively prevent the center deviation of the rotating body such as an impeller with respect to the rotating shaft, and to prevent the fastening force of the rotating body from being reduced. You can
【図１】図１（ａ）は本発明の回転組立体の一実施形態
を概略的に示す一部切欠き側面図であり、図１（ｂ）は
組立前の一部切欠き側面図である。1 (a) is a partially cutaway side view schematically showing an embodiment of a rotary assembly of the present invention, and FIG. 1 (b) is a partially cutaway side view before assembly. is there.
【図２】本発明の回転組立体の他の実施形態を示す一部
切欠き側面図である。FIG. 2 is a partially cutaway side view showing another embodiment of the rotating assembly of the present invention.
【図３】本発明の回転組立体のさらに他の実施形態を示
す一部切欠き側面図である。FIG. 3 is a partially cutaway side view showing still another embodiment of the rotation assembly of the present invention.
【図４】従来の羽根車と回転軸との締結構造を示す一部
切欠き側面図である。FIG. 4 is a partially cutaway side view showing a conventional fastening structure of an impeller and a rotary shaft.
１、２１、３１・・・・羽根車 ２、２２、３２・・・・回転軸 ３、２３、３３・・・・ボス部 ４・・・・羽根 ５、２５・・・・貫通孔 ６、３６ａ・・・・カラー部 ７・・・・端面 ８、８ａ、８ｂ・・・・第一テーパ部 ９、２９・・・・凹所 １０・・・・第二テーパ部 １１・・・・底面 １２・・・・（カラー部の）当接面 １３・・・・ねじ １４・・・・ナット １５・・・・（ボス部の）当接面 １６ａ・・・（ボス部の）キー溝 １６ｂ・・・（回転軸の）キー溝 １７・・・・キー ２６、３６ｂ・・・・カラー部材 ２７・・・・鍔部 ２９ａ・・・ヌスミ １００、１１０、１２０・・・・回転組立体 1, 21, 31, ... Impeller 2, 22, 32 ... Rotating shaft 3, 23, 33 ... Boss 4 ... 5, 25 ... Through holes 6, 36a ... ・ Color part 7 ... End face 8, 8a, 8b ... First taper portion 9, 29 ... Recess 10 ... Second taper part 11 ... bottom surface 12 ... Abutment surface (of collar part) 13 ... Screws 14 ... Nuts 15 ··· Contact surface (of boss) 16a ... Key groove (of boss) 16b ... (Rotation axis) Keyway 17 ... key 26, 36b ... ・ Color members 27 ... 29a ... Nusumi 100, 110, 120 ... Rotating assembly
Claims (6)
ボス部に貫入した回転軸とを、回転軸の軸方向の挟圧力
によって締結するための締結機構であって、 上記ボス部の少なくとも一方の端部の外周面に形成され
た円錐状の第一テーパ部と、 上記回転軸の外周に配設された、その内周面に上記第一
テーパ部と対応する第二テーパ部を有するカラー部とを
備えており、 第一テーパ部と第二テーパ部とが当接し得るように構成
されてなることを特徴とする締結機構。1. A fastening mechanism for fastening a rotary body having a boss portion at its center and a rotary shaft penetrating into the boss portion by clamping force in the axial direction of the rotary shaft, wherein the rotary body has a boss portion. A conical first taper portion formed on the outer peripheral surface of at least one end portion, and a second taper portion corresponding to the first taper portion on the inner peripheral surface disposed on the outer peripheral surface of the rotating shaft. A fastening mechanism, comprising: a collar part having the first taper part and the second taper part.
し可能に配設されてなる請求項１記載の締結機構。2. The fastening mechanism according to claim 1, wherein the collar portion is detachably arranged in the axial direction of the rotary shaft.
成されており、各第一テーパ部に対応するカラー部が回
転軸にそれぞれ配設されており、少なくとも一方のカラ
ー部が回転軸に着脱自在にされてなる請求項１または２
記載の締結機構。3. A first taper portion is formed at both ends of the boss portion, and a collar portion corresponding to each first taper portion is disposed on a rotary shaft, and at least one collar portion is rotated. The shaft according to claim 1 or 2, wherein the shaft is detachable.
Fastening mechanism described.
する回転軸と、 上記ボス部の少なくとも一方の端部の外周面に形成され
た円錐状の第一テーパ部と、 上記回転軸の外周に配設された、その内周面に上記第一
テーパ部と対応する第二テーパ部を有するカラー部と、 上記第一テーパ部と第二テーパ部とが押圧しあうよう
に、回転体およびカラー部のいずれか一方を他方に向け
て付勢する付勢装置とを備えてなる組立回転体。4. A rotary body having a boss portion at its center, a rotary shaft penetrating into the boss portion for transmitting a rotational force between the rotary body, and an outer periphery of at least one end portion of the boss portion. A conical first taper portion formed on the surface, a collar portion disposed on the outer periphery of the rotating shaft and having a second taper portion corresponding to the first taper portion on the inner peripheral surface thereof, An assembled rotating body comprising: a biasing device that biases one of the rotating body and the collar toward the other so that the one tapered portion and the second tapered portion press each other.
方向に取り外し可能に配設されており、該カラー部の反
回転体側に、カラー部が反回転体側に変位することを規
制する固定部材が配設されてなる請求項５記載の組立回
転体。5. A fixing member, wherein at least one of the collar portions is detachably disposed in the axial direction of the rotary shaft, and the collar portion restricts the collar portion from displacing to the anti-rotator side. 6. The assembled rotating body according to claim 5, wherein:
請求項５記載の組立回転体。6. The assembly rotating body according to claim 5, wherein the urging device constitutes a fixing member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001338907A JP2003139156A (en) | 2001-11-05 | 2001-11-05 | Rotor assembly and fastening mechanism thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001338907A JP2003139156A (en) | 2001-11-05 | 2001-11-05 | Rotor assembly and fastening mechanism thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003139156A true JP2003139156A (en) | 2003-05-14 |
Family
ID=19153329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001338907A Pending JP2003139156A (en) | 2001-11-05 | 2001-11-05 | Rotor assembly and fastening mechanism thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003139156A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1630437A1 (en) * | 2004-08-28 | 2006-03-01 | Bayerische Motoren Werke Aktiengesellschaft | Hub shaft connection |
| JP2006214341A (en) * | 2005-02-03 | 2006-08-17 | Shimadzu Corp | Turbo rotating equipment |
| JPWO2006043556A1 (en) * | 2004-10-19 | 2008-05-22 | 株式会社小松製作所 | Turbomachine, compressor impeller used in turbomachine, and method of manufacturing turbomachine |
| US7438531B2 (en) | 2003-11-20 | 2008-10-21 | Delta Electronics, Inc. | Fan and rotor structure thereof |
| JP2010065538A (en) * | 2008-09-08 | 2010-03-25 | Toyota Motor Corp | Gas turbine rotary main shaft |
| US7723888B2 (en) | 2004-05-25 | 2010-05-25 | Marko Petek | Synchronous electromechanical transformer |
| JP2012077643A (en) * | 2010-09-30 | 2012-04-19 | Kobe Steel Ltd | Rotor for centrifugal fluid machinery |
| JP2014095420A (en) * | 2012-11-09 | 2014-05-22 | Cfc Design Inc | Connecting structure of shaft member |
| KR20150036586A (en) * | 2012-08-07 | 2015-04-07 | 보르그워너 인코퍼레이티드 | Compressor wheel with balance correction and positive piloting |
| DE102016012658A1 (en) * | 2016-10-22 | 2018-04-26 | Daimler Ag | Rotor for a turbomachine, in particular of a motor vehicle |
| WO2019059010A1 (en) * | 2017-09-20 | 2019-03-28 | パナソニックＩｐマネジメント株式会社 | Mounting mechanism and electric motor using same |
| CN110017300A (en) * | 2019-05-16 | 2019-07-16 | 上海优社动力科技有限公司 | A kind of self-locking type Centrufugal compressor impeller structure |
-
2001
- 2001-11-05 JP JP2001338907A patent/JP2003139156A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7438531B2 (en) | 2003-11-20 | 2008-10-21 | Delta Electronics, Inc. | Fan and rotor structure thereof |
| DE102004056093B4 (en) * | 2003-11-20 | 2016-10-20 | Delta Electronics, Inc. | Fan and its rotor structure |
| US7723888B2 (en) | 2004-05-25 | 2010-05-25 | Marko Petek | Synchronous electromechanical transformer |
| EP1630437A1 (en) * | 2004-08-28 | 2006-03-01 | Bayerische Motoren Werke Aktiengesellschaft | Hub shaft connection |
| JPWO2006043556A1 (en) * | 2004-10-19 | 2008-05-22 | 株式会社小松製作所 | Turbomachine, compressor impeller used in turbomachine, and method of manufacturing turbomachine |
| JP2006214341A (en) * | 2005-02-03 | 2006-08-17 | Shimadzu Corp | Turbo rotating equipment |
| JP2010065538A (en) * | 2008-09-08 | 2010-03-25 | Toyota Motor Corp | Gas turbine rotary main shaft |
| JP2012077643A (en) * | 2010-09-30 | 2012-04-19 | Kobe Steel Ltd | Rotor for centrifugal fluid machinery |
| KR20150036586A (en) * | 2012-08-07 | 2015-04-07 | 보르그워너 인코퍼레이티드 | Compressor wheel with balance correction and positive piloting |
| KR102032389B1 (en) * | 2012-08-07 | 2019-10-15 | 보르그워너 인코퍼레이티드 | Compressor wheel with balance correction and positive piloting |
| JP2014095420A (en) * | 2012-11-09 | 2014-05-22 | Cfc Design Inc | Connecting structure of shaft member |
| DE102016012658A1 (en) * | 2016-10-22 | 2018-04-26 | Daimler Ag | Rotor for a turbomachine, in particular of a motor vehicle |
| WO2019059010A1 (en) * | 2017-09-20 | 2019-03-28 | パナソニックＩｐマネジメント株式会社 | Mounting mechanism and electric motor using same |
| JPWO2019059010A1 (en) * | 2017-09-20 | 2020-09-03 | パナソニックＩｐマネジメント株式会社 | Mounting mechanism and electric motor using it |
| JP7113237B2 (en) | 2017-09-20 | 2022-08-05 | パナソニックＩｐマネジメント株式会社 | Mounting mechanism and electric motor using the same |
| CN110017300A (en) * | 2019-05-16 | 2019-07-16 | 上海优社动力科技有限公司 | A kind of self-locking type Centrufugal compressor impeller structure |
| CN110017300B (en) * | 2019-05-16 | 2024-01-30 | 上海优社动力科技有限公司 | Self-locking centrifugal compressor impeller structure |
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