JP3901858B2 - Joint structure of power transmission shaft - Google Patents

Joint structure of power transmission shaft Download PDF

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Publication number
JP3901858B2
JP3901858B2 JP25186998A JP25186998A JP3901858B2 JP 3901858 B2 JP3901858 B2 JP 3901858B2 JP 25186998 A JP25186998 A JP 25186998A JP 25186998 A JP25186998 A JP 25186998A JP 3901858 B2 JP3901858 B2 JP 3901858B2
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JP
Japan
Prior art keywords
shaft
pump
outer cylinder
inner cylinder
joint portion
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
Application number
JP25186998A
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Japanese (ja)
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JP2000065082A (en
Inventor
勉 仙道
武 亀井
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.)
Ebara Corp
Original Assignee
Ebara 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 Ebara Corp filed Critical Ebara Corp
Priority to JP25186998A priority Critical patent/JP3901858B2/en
Publication of JP2000065082A publication Critical patent/JP2000065082A/en
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Publication of JP3901858B2 publication Critical patent/JP3901858B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【0001】
【発明の属する技術分野】
本発明は、例えば、立軸ポンプのポンプ軸と電動機の駆動軸を動力伝達可能に連結する動力伝達軸の継手構造に関する。
【0002】
【従来の技術】
例えば、1床式の立軸ポンプにおいては、図4に示すように、ポンプ床10にポンプ装置12が吊り下げ固定され、このポンプ床10に立設された架台14の上面に電動機16が据え付けられる。そして、ポンプ装置12のポンプ軸18と電動機16の駆動軸20とは、例えば、撓み軸継手(フレキシブルカップリング)等の軸継手22によって動力伝達可能に連結される。
【0003】
図5に詳細に示すように、軸継手22の一方の継手部24aがポンプ軸18の端部に、他方の継手部24bが駆動軸20の端部にそれぞれ取り付けられ、両継手部24a,24bは例えば板ばね26等の弾性部材を介してフレキシブルに連結されている。両者を連結する場合には、架台14の高さ寸法に対するポンプ装置12と電動機16間の軸継手面間寸法W1 を調整する必要がある。
【0004】
このため、例えば、ポンプ軸18の端部に螺着された軸ナット(調整ナット)28の端面と該ポンプ軸18に取り付けられる継手部24aの端面との間に円筒状の調整リング30を装着して、軸継手22の取付位置を調整していた。調整リング30の長さLは、電動機16を架台14上に仮据え付けした後、電動機16側の軸端寸法W2 及び軸継手面間寸法W1 を測定して求め、工場或いは現場で長さLを有する調整リング30を加工していた。
【0005】
一方、2床式の立軸ポンプにおいては、図6に示すように、ポンプ床10とは別に電動機床32が設けられ、ポンプ床10にポンプ装置12が吊り下げ固定され、電動機床32の架台34の上面に電動機16が据え付けられている。ポンプ装置12のポンプ軸18と電動機16の駆動軸20とは、軸継手22によって動力伝達可能に連結される。
【0006】
そして、将来、地盤沈下等によって床間寸法に誤差が生じた場合のポンプ装置12と電動機16間の軸継手面間寸法の調整手段として、前述と同様に、ポンプ軸18の端部の軸ナット28の端面と継手部24aの端面との間に調整リング30を装着していた。このことは、多床式の立軸ポンプにあっても同様であった。
【0007】
【発明が解決しようとする課題】
しかしながら、このような従来の技術では、現場で長さを決定し、工場或いは現地で調整リングを加工していたので、作業が煩雑でかつ時間が掛かり、コストアップの要因となっていた。特に、大型の立軸ポンプにあっては、これらの作業を高所で行う必要があるために、安全上も好ましくない。
【0008】
本発明は上記課題に鑑みて為されたもので、調整リングの加工を行わずに軸継手の取付位置を調整することができ、特に、立軸ポンプに使用した場合に、作業の安全とコストの低減を図ることができるようにした動力伝達軸の継手構造を提供することを目的とする。
【0009】
【課題を解決するための手段】
請求項1に記載の発明は、縦軸ポンプのポンプ軸と電動機の駆動軸を動力伝達可能に連結する軸継手の少なくとも一方の継手部と該継手部が取り付けられる軸に固定された固定部材との間に、外周面に雄ねじを刻設した内筒と内周面に前記雄ねじと螺合する雌ねじを刻設した外筒を有し、内筒と外筒とを相対的に回転して固定することで、内筒の端面と外筒の端面間の全長を任意に調節可能な長さ調節機能を有する調節リング装置を、該調節リング装置の前記内筒及び前記外筒の両端面を前記継手部及び前記固定部材にそれぞれ当接させて設けたことを特徴とする動力伝達軸の継手構造である。これにより、内筒と外筒とを相対的に回転して調節リング装置の長さを調整することで、現場合せによる調整加工を施すことなく、軸継手の取付位置を調整することができる。
【0011】
【発明の実施の形態】
以下、本発明の実施の形態を図1乃至図3を参照して説明する。この実施の形態では、ポンプ軸18の端部に螺着された軸ナット28の端面と該ポンプ軸18に取り付けられる継手部24aの端面との間に長さ調整機能を有する調節リング装置40が装着されている。ポンプ軸18と継手部24aとの間にはキー36が装着されて、両者が一体となって回転するようになっている。
【0012】
この調節リング装置40は、ポンプ軸18の装着位置における外径とほぼ同じ内径の内筒42と、この内筒42の周囲を囲繞する外筒44とからなり、内筒42の外周面には雄ねじ46が、外筒44の内周面には雄ねじ46と螺合する雌ねじ48がそれぞれ刻設されている。これによって、内筒42と外筒44とを相対的に回転させることで、内筒42の端面と外筒44の端面間の長さL1を調整できるようになっている。
【0013】
内筒42には、その内周面にキー溝50が設けられ、キー溝50内にキー36を位置させることで回転不能にポンプ軸18に取り付けられる。内筒42の外周面の基準セット位置には、円周方向の全周に亘るV溝52が設けられている。一方、外筒44の円周方向所定位置に、スパナ用の貫通孔54とねじ溝56が設けられ、貫通孔54にスパナの突起を嵌着して回転させることに位置調整が可能であり、ねじ溝56内に止めねじ58を螺着させることで内筒42に固定されるようになっている。
【0014】
この実施の形態において、軸継手22の取付位置を調整する方法を説明する。予め、調節リング機構40の内筒42と外筒44を相対的に回転させて長さ方向に縮めておく。そして、調節リング機構40を、ポンプ軸18の端部の軸ナット28の端面と該ポンプ軸18に取り付けられた継手部24aの端面との間に装着し、継手部24aを適当な部材に仮付けしておく。
【0015】
そして、外筒44の貫通孔54にスパナの突起を嵌着して回転させ、内筒42をポンプ軸18に沿って継手部24aの端面に突き当たるまで延ばし、内筒42の端面と外筒44の端面間の長さL1 を調整する。さらに、スパナを増し締めしてガタを無くした後、ねじ溝56内に止めねじ58を螺着させて内筒42と外筒44を互いに固定する。これにより、調節リング装置40の長さを調整することで、軸継手22の取付位置を容易且つ迅速に調整することができる。
【0016】
【発明の効果】
以上説明したように、本発明によれば、調節リングを用いることにより、調整リングを調整加工する必要がなくなり、軸継手の取付位置調整作業を容易且つ迅速に、しかも安価に行うことができ、電動機の入庫に左右されることなく、組立工程を進めることができる。特に、立軸ポンプに使用することにより、電動機の吊り下げ、吊降しを含む高所での作業時間を大幅に短縮して、危険防止を図ることができる。
【図面の簡単な説明】
【図1】本発明の実施の形態の使用状態の要部を示す断面図である。
【図2】調節リング装置の内筒を示し、(a)は正面図、(b)はそのA−A線断面図である。
【図3】調節リング装置の外筒を示し、(a)は正面図、(b)はそのB−B線断面図である。
【図4】従来の1床式の立軸ポンプの据え付け例を示す縦断正面図である。
【図5】図4の要部拡大図である。
【図6】従来の2床式の立軸ポンプの据え付け例を示す縦断正面図である。
【符号の説明】
12 ポンプ装置
16 電動機
18 ポンプ軸
20 駆動軸
22 軸継手
24a,24b 継手部
40 調節リング装置
42 内筒
44 外筒
46 雄ねじ
48 雌ねじ
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joint structure of a power transmission shaft that connects, for example, a pump shaft of a vertical shaft pump and a drive shaft of an electric motor so that power can be transmitted.
[0002]
[Prior art]
For example, in a single-floor vertical shaft pump, as shown in FIG. 4, a pump device 12 is suspended and fixed to the pump floor 10, and an electric motor 16 is installed on the upper surface of a gantry 14 erected on the pump floor 10. . The pump shaft 18 of the pump device 12 and the drive shaft 20 of the electric motor 16 are connected to each other so as to be able to transmit power by a shaft joint 22 such as a flexible shaft joint (flexible coupling).
[0003]
As shown in detail in FIG. 5, one joint portion 24a of the shaft joint 22 is attached to the end portion of the pump shaft 18, and the other joint portion 24b is attached to the end portion of the drive shaft 20, respectively. Are connected flexibly via an elastic member such as a leaf spring 26, for example. When connecting the both, it is necessary to adjust the shaft coupling surface dimension between W 1 between the pump device 12 and the motor 16 with respect to the height dimension of the gantry 14.
[0004]
For this reason, for example, a cylindrical adjustment ring 30 is mounted between an end surface of a shaft nut (adjustment nut) 28 screwed to an end portion of the pump shaft 18 and an end surface of a joint portion 24 a attached to the pump shaft 18. Thus, the mounting position of the shaft coupling 22 has been adjusted. The length L of the adjustment ring 30 is obtained by temporarily installing the motor 16 on the gantry 14 and then measuring the shaft end dimension W 2 and the shaft joint surface dimension W 1 on the motor 16 side. The adjustment ring 30 having L was processed.
[0005]
On the other hand, in the two-story vertical shaft pump, as shown in FIG. 6, an electric motor floor 32 is provided separately from the pump floor 10, and the pump device 12 is suspended and fixed to the pump floor 10. An electric motor 16 is installed on the upper surface of the motor. The pump shaft 18 of the pump device 12 and the drive shaft 20 of the electric motor 16 are connected by a shaft coupling 22 so that power can be transmitted.
[0006]
As a means for adjusting the dimension between the shaft joint surfaces between the pump device 12 and the electric motor 16 when an error occurs in the dimension between floors due to ground subsidence or the like in the future, the shaft nut at the end of the pump shaft 18 is used as described above. The adjustment ring 30 is mounted between the end face 28 and the end face of the joint portion 24a. The same was true for the multi-bed vertical shaft pump.
[0007]
[Problems to be solved by the invention]
However, in such a conventional technique, since the length is determined at the site and the adjustment ring is processed at the factory or the site, the work is complicated and time-consuming, resulting in a cost increase. In particular, a large vertical shaft pump is not preferable in terms of safety because it is necessary to perform these operations at a high place.
[0008]
The present invention has been made in view of the above problems, and can adjust the mounting position of the shaft coupling without processing the adjustment ring. Especially, when used in a vertical shaft pump, the safety and cost of the work can be reduced. An object of the present invention is to provide a joint structure of a power transmission shaft that can be reduced.
[0009]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided at least one joint portion of a shaft joint that couples the pump shaft of the vertical axis pump and the drive shaft of the electric motor so that power can be transmitted, and a fixing member fixed to the shaft to which the joint portion is attached. In between, there is an inner cylinder with an external thread engraved on the outer peripheral surface and an outer cylinder with an internal thread engraved on the inner peripheral surface with the male screw, and the inner cylinder and the outer cylinder are relatively rotated and fixed. Thus , an adjustment ring device having a length adjustment function capable of arbitrarily adjusting the overall length between the end surface of the inner cylinder and the end surface of the outer cylinder, and the both end surfaces of the inner cylinder and the outer cylinder of the adjustment ring device are A joint structure for a power transmission shaft, wherein the joint portion and the fixing member are provided in contact with each other. Thereby, the attachment position of a shaft coupling can be adjusted without performing the adjustment process by on-site adjustment by rotating the inner cylinder and an outer cylinder relatively, and adjusting the length of an adjustment ring apparatus.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. In this embodiment, an adjusting ring device 40 having a length adjusting function is provided between the end surface of the shaft nut 28 screwed to the end portion of the pump shaft 18 and the end surface of the joint portion 24a attached to the pump shaft 18. It is installed. A key 36 is mounted between the pump shaft 18 and the joint portion 24a so that both rotate together.
[0012]
The adjustment ring device 40 includes an inner cylinder 42 having an inner diameter substantially the same as the outer diameter at the mounting position of the pump shaft 18 and an outer cylinder 44 surrounding the inner cylinder 42. The male screw 46 is engraved on the inner peripheral surface of the outer cylinder 44 with a female screw 48 that is screwed with the male screw 46. Accordingly, the length L 1 between the end surface of the inner tube 42 and the end surface of the outer tube 44 can be adjusted by relatively rotating the inner tube 42 and the outer tube 44.
[0013]
The inner cylinder 42, key groove 50 is provided on the inner peripheral surface thereof, it is attached to rotatably pump shaft 18 by positioning the keys 36 on the key groove 50. At the reference set position on the outer peripheral surface of the inner cylinder 42, a V-groove 52 is provided over the entire circumference in the circumferential direction. On the other hand, a through hole 54 for a wrench and a screw groove 56 are provided at a predetermined position in the circumferential direction of the outer cylinder 44, and the position can be adjusted by fitting and rotating a projection of a wrench in the through hole 54, A set screw 58 is screwed into the thread groove 56 to be fixed to the inner cylinder 42.
[0014]
In this embodiment, a method for adjusting the mounting position of the shaft coupling 22 will be described. In advance, the inner cylinder 42 and the outer cylinder 44 of the adjustment ring mechanism 40 are relatively rotated and contracted in the length direction. Then, the adjusting ring mechanism 40 is mounted between the end face of the shaft nut 28 at the end of the pump shaft 18 and the end face of the joint portion 24a attached to the pump shaft 18, and the joint portion 24a is temporarily attached to an appropriate member. Keep it attached.
[0015]
Then, a projection of a spanner is fitted into the through hole 54 of the outer cylinder 44 and rotated, and the inner cylinder 42 is extended along the pump shaft 18 until it abuts against the end face of the joint portion 24a, and the end face of the inner cylinder 42 and the outer cylinder 44 are extended. The length L 1 between the end faces of the is adjusted. Further, after tightening the spanner to eliminate the play, a set screw 58 is screwed into the screw groove 56 to fix the inner cylinder 42 and the outer cylinder 44 to each other. Thereby, the attachment position of the shaft coupling 22 can be adjusted easily and quickly by adjusting the length of the adjusting ring device 40.
[0016]
【The invention's effect】
As described above, according to the present invention, by using the adjustment ring, there is no need to adjust the adjustment ring, and the mounting position adjustment work of the shaft coupling can be easily and quickly performed at a low cost. The assembly process can proceed without being influenced by the receipt of the electric motor. In particular, when used for a vertical shaft pump, it is possible to significantly reduce the working time at high places including suspension and suspension of the electric motor, and to prevent danger.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a main part of a usage state of an embodiment of the present invention.
FIGS. 2A and 2B show an inner cylinder of the adjusting ring device, in which FIG. 2A is a front view and FIG.
FIGS. 3A and 3B show an outer cylinder of the adjusting ring device, in which FIG. 3A is a front view and FIG.
FIG. 4 is a longitudinal front view showing an example of installation of a conventional single-floor vertical shaft pump.
FIG. 5 is an enlarged view of a main part of FIG.
FIG. 6 is a longitudinal front view showing an installation example of a conventional two-floor vertical shaft pump.
[Explanation of symbols]
12 Pump device 16 Electric motor 18 Pump shaft 20 Drive shaft 22 Joints 24a and 24b Joint part 40 Adjustment ring device 42 Inner cylinder 44 Outer cylinder 46 Male thread 48 Female thread

Claims (1)

縦軸ポンプのポンプ軸と電動機の駆動軸を動力伝達可能に連結する軸継手の少なくとも一方の継手部と該継手部が取り付けられる軸に固定された固定部材との間に、外周面に雄ねじを刻設した内筒と内周面に前記雄ねじと螺合する雌ねじを刻設した外筒を有し、内筒と外筒とを相対的に回転させて固定することで、内筒の端面と外筒の端面間の全長を任意に調節可能な長さ調節機能を有する調節リング装置を、該調節リング装置の前記内筒及び前記外筒の両端面を前記継手部及び前記固定部材にそれぞれ当接させて設けたことを特徴とする動力伝達軸の継手構造。 A male screw is provided on the outer peripheral surface between at least one joint portion of a shaft joint that connects the pump shaft of the vertical pump and the drive shaft of the electric motor so that power can be transmitted, and a fixing member fixed to the shaft to which the joint portion is attached. An inner cylinder that is engraved and an outer cylinder that is engraved with an internal thread that engages with the male screw on the inner peripheral surface, and by rotating and fixing the inner cylinder and the outer cylinder relative to each other , An adjusting ring device having a length adjusting function capable of arbitrarily adjusting the overall length between the end faces of the outer cylinder is applied to both the inner cylinder and the outer cylinder at both ends of the adjusting ring device and the joint portion and the fixing member, respectively. A power transmission shaft joint structure characterized by being provided in contact with each other.
JP25186998A 1998-08-21 1998-08-21 Joint structure of power transmission shaft Expired - Lifetime JP3901858B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25186998A JP3901858B2 (en) 1998-08-21 1998-08-21 Joint structure of power transmission shaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25186998A JP3901858B2 (en) 1998-08-21 1998-08-21 Joint structure of power transmission shaft

Publications (2)

Publication Number Publication Date
JP2000065082A JP2000065082A (en) 2000-03-03
JP3901858B2 true JP3901858B2 (en) 2007-04-04

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4820844B2 (en) * 2008-06-02 2011-11-24 株式会社荏原製作所 Joint structure of power transmission shaft
CN112032093A (en) * 2020-08-20 2020-12-04 瑞卡斯(南京)精密机械有限公司 Water pump impeller transmission shaft connecting structure and sealing water pump

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