JP4364517B2 - Boss fixing mechanism for pump impeller - Google Patents

Boss fixing mechanism for pump impeller Download PDF

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Publication number
JP4364517B2
JP4364517B2 JP2003008342A JP2003008342A JP4364517B2 JP 4364517 B2 JP4364517 B2 JP 4364517B2 JP 2003008342 A JP2003008342 A JP 2003008342A JP 2003008342 A JP2003008342 A JP 2003008342A JP 4364517 B2 JP4364517 B2 JP 4364517B2
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JP
Japan
Prior art keywords
screw
hole
impeller
diameter
nut
Prior art date
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Expired - Fee Related
Application number
JP2003008342A
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Japanese (ja)
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JP2004218573A (en
Inventor
隆浩 松原
秀典 鶴田
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Tsurumi Manufacturing Co Ltd
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Tsurumi Manufacturing Co Ltd
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Filing date
Publication date
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Priority to JP2003008342A priority Critical patent/JP4364517B2/en
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Description

【０００１】
【発明の技術分野】
本発明は、ポンプ用羽根車におけるボス部の固定機構に関するものである。
【０００２】
【従来の技術】
羽根車ボス部の中心孔をポンプ軸に嵌合させ、環状介装体を介して角頭ボルトをポンプ軸のネジ孔に螺装させ、環状介装体と羽根車ボス部を連係ピンにより連係させ、中央の角孔を角頭ボルトに嵌合させて環状介装体に重合させたロックプレートをセットボルトで締着させるという、ポンプ用羽根車におけるボス部の固定機構は公知である（特許文献１参照）。また、ポンプ羽根車を対象としたものではないが、深く穿設されたネジ孔の深部に角穴付きネジ杆を螺入しておき、貫通穴付き角頭ボルトを上記ネジ杆の後方から螺入させ、角頭ボルトの貫通穴からアレンキーを挿し込んでその先端をネジ杆の角穴に係合させ、該アレンキーの回動操作によりネジ杆の前端面を角頭ボルトの後端面へ圧接させて弛み止め効果を得ようとする固定機構も公知である（特許文献２参照）。
【０００３】
【特許文献１】
特開２０００−１９２８９５号公報 （第１図）
【特許文献２】
特開平８−４２５４４号公報 （第２−３図）
【０００４】
【発明が解決しょうとする課題】
特許文献１記載のものは、弛み止め効果は大きいが、構造が複雑で位置合せが瞬速に行われず、取付作業に時間が掛かるという欠点がある。また、特許文献２記載のものは、構造的な複雑さはないが操作はやや煩雑で、ネジ杆と角頭ボルトの圧接が強力に作用し難く、これをポンプ羽根車の固定用として実施した場合には、羽根車ボス部の介在によりボルト頭からネジ杆までの距離が図示よりも更に長くなり、長いアレンキーによってネジ孔深部のネジ杆を操作しなければならず、アレンキーの捻り強度も低下し、ネジ杆と角頭ボルトの圧接作用が不十分となることは避けられない。
【０００５】
本発明の目的は、構造が簡潔で取付作業が迅速且つ容易に行われ、ローコストで、しかも弛み止め効果の大きい、ポンプ用羽根車におけるボス部の固定機構を提供することにある。
【０００６】
【問題を解決するための手段】
本発明に係るポンプ用羽根車におけるボス部の固定機構では、羽根車ボス部の前端面から穿設された大径有底孔の孔底部中心より羽根車ボス部の後端面へかけて小径貫通孔を穿設し、上記大径有底孔の内周面にはネジ栓の雄ネジと螺合する雌ネジを刻設し、ポンプ軸の前端面中心から導出されたネジ杆を小径貫通孔より大径有底孔側へ向けて挿通し、大径有底孔内においてネジ杆にポンプ軸の回転方向に対して締付け方向のナットを螺合することにより羽根車をポンプ軸に定着させ、且つ、上記大径有底孔に上記ナットと同一方向ネジのネジ栓を螺装してその後端面を上記ナットの前端面へ圧接させ、ポンプの回転によってダブルナット作用を生じさせるポンプ用羽根車におけるボス部の固定機構を提供する。
【０００７】
【実施例】
以下図１及び図２の実施例により説明をする。
【０００８】
１は羽根車ボス部、２は羽根車ボス部１の前端面から穿設された大径有底孔であり、内周面には雌ネジが刻設されている。３は大径有底孔２の孔底部中心より羽根車ボス部１の後端面へかけて穿設された小径貫通孔、４はポンプ軸、５はポンプ軸４の前端面中心から導出されたネジ杆、６は外周面を多角形に形成した該ポンプ軸４の回転方向に対して締付け方向のナットであり、内周面には上記ネジ杆５と螺合する雌ネジが刻設されている。
【０００９】
７は大径有底孔２の雌ネジと螺合する雄ネジを外周面に刻設した該ナット６と同一方向ネジのネジ栓であり、レンチ等螺回工具の係入に供するため、例えば端面中心に角孔を設け、或いは外周面の前端部付近を多角形に形成しておくものとする。
【００１０】
羽根車ボス部１の小径貫通孔３をポンプ軸４のネジ杆５に貫挿させ、大径有底孔２内においてナット６をネジ杆５に螺装することにより羽根車をポンプ軸４に定着させ、且つ、ネジ栓７を大径有底孔２に螺装してその後端面をナット６の前端面へ圧接させれば、ナット６の前端面に、それよりも大きな螺旋サイズのネジ栓７のねじ込みトルクによって強固なダブルナット作用を生じることになる。
【００１１】
【発明の効果】
本発明ポンプ用羽根車におけるボス部の固定機構によれば、構造が簡潔で取付作業が迅速且つ容易に行われ、ローコストで比較的小さなナット６を用いても、それよりも大きなサイズのネジ栓７のねじ込みトルクにより、ポンプの回転によってダブルナット作用を生じさせる、ポンプ用羽根車におけるボス部の固定機構として、強力な弛み止め効果が得られるという利点がある。
【図面の簡単な説明】
【図１】 本発明機構による羽根車定着手順を示した要部縦断側面図であって、ネジ栓未螺装の状態である。
【図２】 本発明機構による羽根車定着手順を示した要部縦断側面図であって、ネジ栓螺装後の状態である。
【符号の説明】
１ 羽根車ボス部
２ 大径有底孔
３ 小径貫通孔
４ ポンプ軸
５ ネジ杆
６ ナット
７ ネジ栓[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fixing mechanism for a boss portion in a pump impeller.
[0002]
[Prior art]
The center hole of the impeller boss part is fitted to the pump shaft, the square head bolt is screwed into the screw hole of the pump shaft through the annular interposer, and the annular interposer and the impeller boss part are linked by the linkage pin. A fixing mechanism for a boss portion in a pump impeller is known in which a central square hole is fitted to a square head bolt, and a lock plate that is superposed on an annular interposed body is fastened with a set bolt (patent) Reference 1). Although not intended for a pump impeller, a screw hole with a square hole is screwed into a deep portion of a deeply drilled screw hole, and a square head bolt with a through hole is screwed from behind the screw hole. Insert the Allen key from the through hole of the square head bolt, engage the tip of the Allen key with the square hole of the screw 杆, and press the front end surface of the screw へ to the rear end surface of the square head bolt by rotating the Allen key. In addition, a fixing mechanism for obtaining a loosening prevention effect is also known (see Patent Document 2).
[0003]
[Patent Document 1]
JP 2000-192895 (FIG. 1)
[Patent Document 2]
JP-A-8-42544 (Fig. 2-3)
[0004]
[Problems to be solved by the invention]
Although the thing of patent document 1 has a big anti-loosening effect, there exists a fault that a structure is complicated and alignment is not performed instantaneously and attachment work takes time. Moreover, although the thing of patent document 2 does not have structural complexity, operation is a little complicated, and the press contact of a screw rod and a square head bolt does not act strongly, and this was implemented for the fixing of a pump impeller. In this case, the distance from the bolt head to the screw rod becomes longer than shown in the figure due to the intervening impeller boss, and the screw rod in the deep part of the screw hole must be operated with a long Allen key, and the twist strength of the Allen key is also reduced. However, it is inevitable that the pressure contact action between the screw rod and the square head bolt is insufficient.
[0005]
An object of the present invention is to provide a fixing mechanism for a boss portion in a pump impeller that has a simple structure, can be mounted quickly and easily, is low-cost, and has a large anti-loosening effect.
[0006]
[Means for solving problems]
In the boss portion fixing mechanism in the pump impeller according to the present invention, the small-diameter penetrating from the center of the bottom of the large-diameter bottomed hole drilled from the front end surface of the impeller boss portion to the rear end surface of the impeller boss portion. A hole is drilled, and a female screw that engages with the male screw of the screw cap is engraved on the inner peripheral surface of the large-diameter bottomed hole, and a screw rod led out from the center of the front end surface of the pump shaft is inserted into the small-diameter through-hole. The impeller is fixed to the pump shaft by inserting it toward the larger diameter bottomed hole side, and screwing a nut in the tightening direction with respect to the rotation direction of the pump shaft into the screw rod in the large diameter bottomed hole, In the impeller for a pump, a screw cap having the same direction screw as the nut is screwed into the large-diameter bottomed hole, a rear end surface thereof is pressed against the front end surface of the nut, and a double nut action is generated by rotation of the pump. that provides a locking mechanism of the boss.
[0007]
【Example】
This will be described below with reference to the embodiment shown in FIGS.
[0008]
Reference numeral 1 denotes an impeller boss portion, and 2 denotes a large-diameter bottomed hole drilled from the front end surface of the impeller boss portion 1, and a female screw is engraved on the inner peripheral surface. 3 is a small-diameter through hole drilled from the center of the bottom of the large-diameter bottomed hole 2 to the rear end surface of the impeller boss 1, 4 is a pump shaft, and 5 is derived from the center of the front end surface of the pump shaft 4. The screw rods 6 and 6 are nuts in the tightening direction with respect to the rotation direction of the pump shaft 4 whose outer peripheral surface is formed in a polygonal shape, and female screws that are screwed with the screw rods 5 are engraved on the inner peripheral surface. Yes.
[0009]
Reference numeral 7 denotes a screw plug of a screw in the same direction as the nut 6 in which a male screw threadedly engaged with a female screw of the large-diameter bottomed hole 2 is engraved on the outer peripheral surface, and is used for engaging a screw tool such as a wrench. A square hole is provided at the center of the end face, or the vicinity of the front end portion of the outer peripheral face is formed in a polygon.
[00 10 ]
The small diameter through hole 3 of the impeller boss 1 is inserted into the screw rod 5 of the pump shaft 4, and the nut 6 is screwed to the screw rod 5 in the large diameter bottomed hole 2, whereby the impeller is attached to the pump shaft 4. If the screw plug 7 is screwed into the large-diameter bottomed hole 2 and its rear end face is pressed against the front end face of the nut 6, a screw plug having a larger spiral size is placed on the front end face of the nut 6. A strong double nut action is produced by the screwing torque of 7.
[001 1 ]
【The invention's effect】
According to the fixing mechanism of the boss portion in the pump impeller of the present invention, the structure is simple, the mounting operation is performed quickly and easily, and a screw cap having a larger size than that can be obtained even if a relatively small nut 6 is used at low cost. As a fixing mechanism for the boss portion of the pump impeller that causes a double nut action by rotation of the pump, the screwing torque of 7 has an advantage that a strong loosening prevention effect can be obtained.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of a main part showing an impeller fixing procedure by a mechanism of the present invention, in a state where a screw cap is not screwed.
FIG. 2 is a longitudinal sectional side view showing a main part of the impeller fixing procedure according to the mechanism of the present invention, after screw screwing.
[Explanation of symbols]
1 Impeller boss 2 Large-diameter bottomed hole 3 Small-diameter through-hole 4 Pump shaft 5 Screw rod 6 Nut 7 Screw plug

Claims (1)

羽根車ボス部の前端面から穿設された大径有底孔の孔底部中心より羽根車ボス部の後端面へかけて小径貫通孔を穿設し、上記大径有底孔の内周面にはネジ栓の雄ネジと螺合する雌ネジを刻設し、ポンプ軸の前端面中心から導出されたネジ杆を小径貫通孔より大径有底孔側へ向けて挿通し、大径有底孔内においてネジ杆にポンプ軸の回転方向に対して締付け方向のナットを螺合することにより羽根車をポンプ軸に定着させ、且つ、上記大径有底孔に上記ナットと同一方向ネジのネジ栓を螺装してその後端面を上記ナットの前端面へ圧接させ、ポンプの回転によってダブルナット作用を生じさせることを特徴とする、ポンプ用羽根車におけるボス部の固定機構。A small-diameter through hole is drilled from the center of the bottom of the large-diameter bottomed hole drilled from the front end surface of the impeller boss portion to the rear end surface of the impeller boss portion, and the inner peripheral surface of the large-diameter bottomed hole Is engraved with a female screw that engages with the male screw of the screw cap, and the screw rod led out from the center of the front end surface of the pump shaft is inserted from the small-diameter through hole toward the large-diameter bottomed hole side. The impeller is fixed to the pump shaft by screwing a nut in the tightening direction with respect to the rotation direction of the pump shaft in the bottom hole in the bottom hole, and the screw having the same direction screw as the nut is fixed to the large-diameter bottomed hole. the rear end face and screwed the threaded plug is pressed against the front end surface of the nut, characterized Rukoto cause double nut action by the rotation of the pump, the fixing mechanism of the boss portion of the pump impeller.
JP2003008342A 2003-01-16 2003-01-16 Boss fixing mechanism for pump impeller Expired - Fee Related JP4364517B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003008342A JP4364517B2 (en) 2003-01-16 2003-01-16 Boss fixing mechanism for pump impeller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003008342A JP4364517B2 (en) 2003-01-16 2003-01-16 Boss fixing mechanism for pump impeller

Publications (2)

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JP2004218573A JP2004218573A (en) 2004-08-05
JP4364517B2 true JP4364517B2 (en) 2009-11-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108825550A (en) * 2018-08-30 2018-11-16 湖南机油泵股份有限公司 A kind of impeller and water pump of the fast quick-detach of energy

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109555723B (en) * 2018-11-16 2020-05-12 襄阳五二五泵业有限公司 Detachable impeller seal head structure for dredge pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108825550A (en) * 2018-08-30 2018-11-16 湖南机油泵股份有限公司 A kind of impeller and water pump of the fast quick-detach of energy

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