JP2023105938A - Pump device - Google Patents

Pump device Download PDF

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Publication number
JP2023105938A
JP2023105938A JP2022006974A JP2022006974A JP2023105938A JP 2023105938 A JP2023105938 A JP 2023105938A JP 2022006974 A JP2022006974 A JP 2022006974A JP 2022006974 A JP2022006974 A JP 2022006974A JP 2023105938 A JP2023105938 A JP 2023105938A
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Japan
Prior art keywords
partition member
sealing member
pump device
resin sealing
rotor
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JP2022006974A
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Japanese (ja)
Inventor
岳彦 矢澤
Takehiko Yazawa
岳 山本
Takeshi Yamamoto
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Nidec Instruments Corp
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Nidec Instruments Corp
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Priority to JP2022006974A priority Critical patent/JP2023105938A/en
Priority to PCT/JP2023/000238 priority patent/WO2023140131A1/en
Publication of JP2023105938A publication Critical patent/JP2023105938A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

To provide a pump device which can reduce manufacturing costs.SOLUTION: A pump device 1 includes: a motor 2 including a rotor 3 and a stator 4; a resin impeller 5 which is disposed at one side L1 of the rotor 3 and integrally rotates with the rotor 3; a case 6 which defines a pump chamber 60 for housing the impeller 5; a resin partition member 7 which defines the pump chamber 60 with the case 6 attached thereto from the one side L1 and is disposed between the rotor 3 and the stator 4; a resin sealing member 8 which covers the stator 4 and which the partition member 7 overlaps with from the one side L1; and a fixing mechanism 9 which detachably fixes the partition member 7 to the resin sealing member 8. The case 6 and the partition member 7 are formed of a first resin material and the resin sealing member 8 is formed of a second resin material different from the first resin material. The case 6 and the partition member 7 are fixed by welding.SELECTED DRAWING: Figure 2

Description

本発明は、ポンプ室を形成するケースおよび隔壁部材が互いに溶着されたポンプ装置に関する。 The present invention relates to a pump device in which a case forming a pump chamber and a partition member are welded together.

ポンプ装置は、特許文献１に記載されている。特許文献１のポンプ装置は、エンジンの冷却水を循環させるために用いられる。特許文献１のポンプ装置は、ロータおよびステータを備えたモータと、ロータの一方側に配置されロータと一体に回転するインペラと、インペラを収容する樹脂製のポンプハウジングと、ステータを覆う樹脂製のモータハウジングとを備える。モータハウジングには、インペラと対向する対向面と、ロータを収容するロータ室と、ロータ室の底部である隔壁とが一体に形成されている。 A pump device is described in US Pat. The pump device of Patent Document 1 is used to circulate engine cooling water. The pump device of Patent Document 1 includes a motor having a rotor and a stator, an impeller arranged on one side of the rotor and rotating integrally with the rotor, a resin pump housing that houses the impeller, and a resin housing that covers the stator. a motor housing. The motor housing is integrally formed with a facing surface that faces the impeller, a rotor chamber that houses the rotor, and a partition that is the bottom of the rotor chamber.

ポンプハウジングのモータハウジング側端部には、円形のポンプ側フランジが形成されている。モータハウジングのポンプハウジング側端部には、円形のモータ側フランジが形成されている。ポンプ側フランジとモータ側フランジとを溶着によって互いを接合することによって、ポンプハウジングは、モータハウジングの一方側から固定されている。このとき、モータハウジング、対向面、ロータ室および隔壁は、ポンプ室を形成する。 A circular pump-side flange is formed at the motor-housing-side end of the pump housing. A circular motor-side flange is formed at the pump-housing-side end of the motor housing. The pump housing is fixed from one side of the motor housing by welding together the pump-side flange and the motor-side flange. The motor housing, the facing surface, the rotor chamber and the partition then form a pump chamber.

特開２０１６－２２７２８号公報JP 2016-22728 A

ポンプ装置の製造時において、ポンプハウジングとモータハウジングとの溶着不良が発生する場合がある。この場合、溶着不良個所から冷却水が漏れるため、溶着不良箇所を構成する部材を廃棄して新しい部材に交換しなければならないが、特許文献１では、モータハウジングがステータと一体化されている。したがって、モータが正常であっても、モータハウジングと共にステータまでも廃棄対象となってしまう。このため、ポンプ装置の製造コストが嵩むという問題があった。 During the manufacture of the pump device, a welding failure may occur between the pump housing and the motor housing. In this case, cooling water leaks from the poorly welded portion, so the member forming the poorly welded portion must be discarded and replaced with a new member. Therefore, even if the motor is normal, not only the motor housing but also the stator will be discarded. Therefore, there is a problem that the manufacturing cost of the pump device increases.

また、ポンプ装置が循環する冷却水は高温・高圧となるため、ポンプ室を形成する部分には、耐水性の優れた樹脂を使用する必要がある。一方で、ステータを覆う樹脂は耐水性の低い安価な樹脂を用いることができるが、特許文献１の構成では、冷却水と接する対向面、ロータ室および隔壁がステータを覆う樹脂と一体化されてモータハウジングを形成しており、安価な樹脂でもよい部分（ステータを覆う部分）まで高価な耐水性の樹脂で成形されている。この結果、モータハウジングの原価が高くなるので、ポンプ装置の製造コストが嵩むという問題がある。 In addition, since the cooling water circulated by the pump device is at a high temperature and a high pressure, it is necessary to use a highly water-resistant resin for the portion forming the pump chamber. On the other hand, an inexpensive resin with low water resistance can be used as the resin that covers the stator. The motor housing is formed, and parts that can be made of inexpensive resin (parts that cover the stator) are also molded with expensive water-resistant resin. As a result, the cost of the motor housing becomes high, which raises the problem that the manufacturing cost of the pump device increases.

以上の問題に鑑みて、本発明の課題は、製造コストを抑制することができるポンプ装置を提供することにある。 In view of the above problems, an object of the present invention is to provide a pump device capable of suppressing manufacturing costs.

上記課題を解決するため、本発明は、ロータおよび前記ロータの外周側に筒状に配置されたステータを備えるモータと、前記ロータの回転中心軸線が延在する軸線方向の一方側に配置され、前記ロータと一体に回転する樹脂製のインペラと、前記インペラを収容するポンプ室を区画するケースと、前記一方側から前記ケースが被せられて前記ポンプ室を区
画するとともに、前記ロータと前記ステータとの間に配置される隔壁部材と、前記ステータを覆うとともに前記隔壁部材が前記一方側から重ねられる樹脂封止部材と、前記隔壁部材と前記樹脂封止部材とを着脱可能に固定する固定機構とを有し、前記ケースおよび前記隔壁部材は、第１の樹脂材料によって形成され、前記樹脂封止部材は、前記第１の樹脂材料とは異なる第２の樹脂材料によって形成され、前記ケースと前記隔壁部材とは、溶着によって固定されることを特徴とする。 In order to solve the above problems, the present invention provides a motor that includes a rotor and a stator that is cylindrically arranged on the outer peripheral side of the rotor; a resin impeller that rotates integrally with the rotor; a case that defines a pump chamber that houses the impeller; a partition member disposed between; a resin sealing member that covers the stator and overlaps the partition member from one side; and a fixing mechanism that detachably fixes the partition member and the resin sealing member. wherein the case and the partition member are made of a first resin material, the resin sealing member is made of a second resin material different from the first resin material, and the case and the The partition member is characterized by being fixed by welding.

本発明によれば、インペラを収容するポンプ室を区画するケースと、ケースが被せられてポンプ室を区画する隔壁部材とは、溶着によって固定される。隔壁部材と樹脂封止部材とは、着脱可能な固定機構によって固定される。したがって、ケースと隔壁部材との溶着不良が生じても、隔壁部材を樹脂封止部材から外して廃棄できるので、ステータおよび樹脂封止部材を廃棄する必要がない。これにより、ポンプ装置の製造コストを抑制することができる。 According to the present invention, the case that defines the pump chamber that houses the impeller and the partition member that is covered with the case and defines the pump chamber are fixed by welding. The partition member and the resin sealing member are fixed by a detachable fixing mechanism. Therefore, even if a welding failure occurs between the case and the partition member, the partition member can be removed from the resin sealing member and discarded, so there is no need to discard the stator and the resin sealing member. Thereby, the manufacturing cost of the pump device can be suppressed.

また、ケースおよび隔壁部材は、第１の樹脂材料によって形成され、樹脂封止部材は、第１の樹脂材料とは異なる第２の樹脂材料によって形成される。したがって、ポンプ室を構成するケースおよび隔壁部材の樹脂材料を耐水性の優れた樹脂材料とし、樹脂封止部材の樹脂材料を耐水性の劣る樹脂材料とすることできるので、全ての部材を耐水性の優れた樹脂材料とした場合と比較して、ポンプ装置の製造コストを抑制することができる。 Also, the case and the partition member are made of a first resin material, and the resin sealing member is made of a second resin material different from the first resin material. Therefore, the resin material of the case and the partition member constituting the pump chamber can be made of a resin material having excellent water resistance, and the resin material of the resin sealing member can be made of a resin material having poor water resistance. The manufacturing cost of the pump device can be suppressed as compared with the case of using a resin material having excellent properties.

本発明において、前記第１の樹脂材料は、ポリフェニレンサルファイドであり、前記第２の樹脂材料は、ポリブチレンテレフタレートであるものとすることができる。 In the present invention, the first resin material may be polyphenylene sulfide, and the second resin material may be polybutylene terephthalate.

本発明において、前記固定機構は、スナップフィット構造であることが好ましい。スナップフィット構造は、樹脂部材の弾性を利用して機械的に係合させる構造であるため、隔壁部材と樹脂封止部材とを容易に着脱できるとともに、隔壁部材と樹脂封止部材とがガタつくことを抑制できる。 In the present invention, it is preferable that the fixing mechanism has a snap-fit structure. Since the snap-fit structure is a structure that mechanically engages using the elasticity of the resin member, the partition member and the resin sealing member can be easily attached and detached, and the partition member and the resin sealing member rattle. can be suppressed.

本発明において、前記隔壁部材は、前記ロータと前記ステータとの間に配置される円筒部と、前記円筒部の前記一方側の端部から径方向の外側に広がる鍔部と、前記円筒部の前記軸線方向の他方側の端部を塞ぐ端板部と、を備え、前記固定機構は、前記樹脂封止部材の外周面に設けられた第１固定部と、前記鍔部から前記他方側へ延びて前記第１固定部と係合する第２固定部とを備えることが好ましい。このようすれば、軸線方向に着脱可能な固定機構を設けることが容易である。 In the present invention, the partition member includes a cylindrical portion arranged between the rotor and the stator, a flange extending radially outwardly from the one end of the cylindrical portion, and a portion of the cylindrical portion. and an end plate portion that closes the end portion on the other side in the axial direction. The fixing mechanism includes a first fixing portion provided on the outer peripheral surface of the resin sealing member, and a It preferably comprises a second securing portion that extends and engages with the first securing portion. In this way, it is easy to provide a fixing mechanism that can be attached and detached in the axial direction.

本発明において、前記樹脂封止部材は、前記円筒部を内側に収容し前記ステータを封止する筒状の本体部を備え、前記本体部は、前記鍔部と前記軸線方向に対向する対向面を備え、前記対向面と前記鍔部との間には、環状の弾性部材が前記軸線方向に弾性変形した状態で配置されることが好ましい。このようにすれば、弾性部材がシール部材として機能し、隔壁部材と樹脂封止部材との隙間を密封できる。したがって、防水性を高めることができる。また、環状部と鍔部との間において、弾性部材の付勢力が軸線方向に働くので、固定機構によって隔壁部材と樹脂封止部材とを軸線方向に着脱可能に固定した際、隔壁部材と樹脂封止部材とがガタつくことを抑制することができる。 In the present invention, the resin sealing member includes a cylindrical main body portion that accommodates the cylindrical portion inside and seals the stator, and the main body portion faces the flange portion in the axial direction. and an annular elastic member is preferably disposed between the facing surface and the flange portion in a state of being elastically deformed in the axial direction. With this configuration, the elastic member functions as a sealing member, and the gap between the partition member and the resin sealing member can be sealed. Therefore, waterproofness can be improved. In addition, since the biasing force of the elastic member acts in the axial direction between the annular portion and the flange portion, when the partition member and the resin sealing member are detachably fixed in the axial direction by the fixing mechanism, the partition member and the resin are It is possible to suppress rattling with the sealing member.

本発明において、前記モータは、回路基板を備え、前記樹脂封止部材は、前記本体部の前記他方側を塞ぐ底部と、前記本体部から前記底部の前記他方側へ延びる筒部とを備え、前記回路基板は、前記筒部の内側に収容されることが好ましい。このようにすれば、ポンプ室等から漏れた液体が弾性部材を通過して本体部の内側まで侵入しても、本体部の内側は、底部によって、筒部の内部と隔てられているので、液体が回路基板に到達することを抑制することができる。 In the present invention, the motor includes a circuit board, and the resin sealing member includes a bottom portion that closes the other side of the main body portion, and a cylindrical portion that extends from the main body portion to the other side of the bottom portion, It is preferable that the circuit board is accommodated inside the cylindrical portion. With this configuration, even if liquid leaking from the pump chamber or the like passes through the elastic member and enters the inside of the main body, the inside of the main body is separated from the inside of the cylinder by the bottom. It is possible to suppress the liquid from reaching the circuit board.

本発明において、前記第１固定部は、第１係止部と、前記第１係止部に対して周方向に離隔した第２係止部を備え、前記第２固定部は、前記第１係止部と前記第２係止部の間に挿入される第１フック部および第２フック部を備え、前記第１フック部と前記第２フック部のそれぞれは、前記他方側へ延びるアーム部と、前記アーム部の先端に設けられた爪部を備え、前記第１係止部と前記第２係止部のそれぞれは、前記他方側を向く係合面を備え、前記係合面に前記爪部が他方側から係合することが好ましい。このようにすると、スナップフィット構造の固定機構を構成することができ、アーム部を撓ませることによって爪部と係合面とを機械的に係合させることができる。したがって、容易に着脱可能で、且つ、ガタつきの少ない固定機構を構成できる。 In the present invention, the first fixing portion includes a first locking portion and a second locking portion spaced apart from the first locking portion in the circumferential direction, and the second fixing portion includes the first locking portion. a first hook portion and a second hook portion inserted between the locking portion and the second locking portion, wherein each of the first hook portion and the second hook portion is an arm portion extending to the other side; and a claw portion provided at the tip of the arm portion, each of the first locking portion and the second locking portion has an engaging surface facing the other side, and the engaging surface has the It is preferred that the pawl engages from the other side. In this way, a fixing mechanism with a snap-fit structure can be constructed, and the claw portion and the engaging surface can be mechanically engaged by bending the arm portion. Therefore, it is possible to construct a fixing mechanism that can be easily attached and detached and that has little backlash.

本発明において、前記鍔部は、前記他方側を向く第１面を備え、前記第１フック部と前記第２フック部の少なくとも一方は、前記第１面から前記他方側へ突出する基部を備え、前記アーム部は、前記基部から前記他方側へ延びており、前記第１係止部と前記第２係止部の少なくとも一方は、前記基部に対して前記軸線方向に対向する壁面と、前記壁面から前記一方側へ突出する凸部を備え、前記係合面に前記爪部が前記他方側から係合する際、前記凸部は、前記基部に前記他方側から当接して前記軸線方向に潰されることが好ましい。このようにすると、第１固定部と第２固定部の寸法精度および位置精度が低くても、凸部を潰すことによって隔壁部材と樹脂封止部材との軸線方向の隙間をなくすことができるので、隔壁部材と樹脂封止部材との軸線方向のガタつきを抑制できる。 In the present invention, the collar portion has a first surface facing the other side, and at least one of the first hook portion and the second hook portion has a base projecting from the first surface to the other side. , the arm portion extends from the base portion to the other side, and at least one of the first locking portion and the second locking portion includes a wall surface facing the base portion in the axial direction; A protrusion projecting from the wall surface to the one side is provided, and when the claw engages with the engaging surface from the other side, the protrusion contacts the base from the other side and extends in the axial direction. preferably crushed. With this configuration, even if the dimensional accuracy and the positional accuracy of the first fixing portion and the second fixing portion are low, the gap in the axial direction between the partition member and the resin sealing member can be eliminated by crushing the convex portion. , the rattling in the axial direction between the partition member and the resin sealing member can be suppressed.

本発明において、前記固定機構は、前記軸線の周方向に等間隔で複数設けられることが好ましい。このようにすれば、隔壁部材を樹脂封止部材に対して均等に固定することができる。 In the present invention, it is preferable that a plurality of fixing mechanisms be provided at equal intervals in the circumferential direction of the axis. In this way, the partition member can be evenly fixed to the resin sealing member.

本発明によれば、隔壁部材と樹脂封止部材とは、着脱可能な固定機構によって固定される。よって、ケースと隔壁部材との溶着不要が生じても、隔壁部材を樹脂封止部材から外すことができるので、ステータを覆う樹脂封止部材を廃棄する必要がない。これにより、ポンプ装置の製造コストを抑制することができる。 According to the present invention, the partition member and the resin sealing member are fixed by the detachable fixing mechanism. Therefore, even if the case and the partition member do not need to be welded together, the partition member can be removed from the resin sealing member, so there is no need to discard the resin sealing member that covers the stator. Thereby, the manufacturing cost of the pump device can be suppressed.

本発明を適用したポンプ装置１の斜視図である。1 is a perspective view of a pump device 1 to which the present invention is applied; FIG. 図１に示すポンプ装置１を一方側から見た分解斜視図である。2 is an exploded perspective view of the pump device 1 shown in FIG. 1 as seen from one side; FIG. 図１に示すポンプ装置１を他方側から見た分解斜視図である。2 is an exploded perspective view of the pump device 1 shown in FIG. 1 as seen from the other side; FIG. 図１に示すポンプ装置の断面図である。2 is a cross-sectional view of the pump device shown in FIG. 1; FIG. 固定機構の斜視図である。FIG. 3 is a perspective view of a fixing mechanism; 固定機構の分解斜視図である。It is an exploded perspective view of a fixing mechanism.

以下、図面を参照して、本発明を適用したポンプ装置の実施形態について説明する。 An embodiment of a pump device to which the present invention is applied will be described below with reference to the drawings.

（全体構成）
図１は、本発明を適用したポンプ装置１の斜視図である。図２は、図１に示すポンプ装置１を一方側から見た分解斜視図である。図３は、図１に示すポンプ装置１を他方側から見た分解斜視図である。図４は、図１に示すポンプ装置の断面図である。以下の説明において、後述するモータにおけるロータの回転中心軸線が延在する方向を軸線方向Ｌとして説明する。また、軸線方向Ｌにおいて、一方側にはＬ１を付し、他方側にＬ２を付して説明する。また、以下の説明において、ロータの回転中心軸線を中心とする径方向および周方向を各々、単に「径方向」および「周方向」とする。 (overall structure)
FIG. 1 is a perspective view of a pump device 1 to which the present invention is applied. FIG. 2 is an exploded perspective view of the pump device 1 shown in FIG. 1 as seen from one side. FIG. 3 is an exploded perspective view of the pump device 1 shown in FIG. 1 as seen from the other side. 4 is a cross-sectional view of the pump device shown in FIG. 1. FIG. In the following description, the axial direction L is defined as the direction in which the rotation center axis of the rotor of the motor, which will be described later, extends. Also, in the axial direction L, one side is denoted by L1 and the other side is denoted by L2. Further, in the following description, the radial direction and the circumferential direction about the rotation center axis of the rotor are simply referred to as the "radial direction" and the "circumferential direction", respectively.

図１～図４に示すように、ポンプ装置１は、ロータ３およびロータ３の外周側に筒状に配置されたステータ４を備えるモータ２と、ロータ３の一方側Ｌ１に配置されロータ３と一体に回転する樹脂製のインペラ５と、インペラ５を収容するポンプ室６０を区画するケース６と、を備える。また、ポンプ装置１は、一方側Ｌ１からケース６が被せられてポンプ室６０を区画する隔壁部材７と、ステータ４を覆うとともに隔壁部材７が一方側Ｌ１から重ねられる樹脂封止部材８と、隔壁部材７と樹脂封止部材８とをスナップフィット構造により固定する固定機構９とを備える。ポンプ装置１は、インペラ５がロータ３と一体に回転することによりポンプ室６０内の流体を移動させる。 As shown in FIGS. 1 to 4, the pump device 1 includes a motor 2 having a rotor 3 and a stator 4 arranged cylindrically on the outer peripheral side of the rotor 3, and a rotor 3 arranged on one side L1 of the rotor 3. It has a resin impeller 5 that rotates integrally and a case 6 that defines a pump chamber 60 that houses the impeller 5 . Further, the pump device 1 includes a partition member 7 covered with the case 6 from one side L1 to partition the pump chamber 60, a resin sealing member 8 covering the stator 4 and overlapping the partition member 7 from the one side L1, A fixing mechanism 9 for fixing the partition member 7 and the resin sealing member 8 by a snap-fit structure is provided. The pump device 1 moves the fluid in the pump chamber 60 by rotating the impeller 5 together with the rotor 3 .

（モータ）
図２～図４に示すように、モータ２は、ロータ３と、ロータ３の外周側に筒状に配置されたステータ４と、回路基板２１とを備える。モータ２は、ＤＣブラスレスモータである。ロータ３は、軸線方向Ｌに延びる円筒状のホルダ３１と、ホルダ３１の内側に固定された円筒状のラジアル軸受２２と、ホルダ３１の外周面に保持された円筒状の磁石２３と、ラジアル軸受２２を介してロータ３を回転可能に支持する支持軸２４とを備える。 (motor)
As shown in FIGS. 2 to 4, the motor 2 includes a rotor 3, a stator 4 cylindrically arranged on the outer peripheral side of the rotor 3, and a circuit board . Motor 2 is a DC brushless motor. The rotor 3 includes a cylindrical holder 31 extending in the axial direction L, a cylindrical radial bearing 22 fixed inside the holder 31, a cylindrical magnet 23 held on the outer peripheral surface of the holder 31, and a radial bearing. and a support shaft 24 that rotatably supports the rotor 3 via 22 .

ホルダ３１は、樹脂製である。ホルダ３１は、外周面に磁石２３を保持する小径筒部３２と、磁石２３の一方側Ｌ１の端部と当接する円形のフランジ部３３と、フランジ部３３から一方側Ｌ１に突出する大径筒部３４とを備える。小径筒部３２の外径寸法は、大径筒部３４の外径寸法より小さい。小径筒部３２と大径筒部３４とは、同軸に設けられている。小径筒部３２は、内部にラジアル軸受２２を保持する。 The holder 31 is made of resin. The holder 31 has a small-diameter tubular portion 32 that holds the magnet 23 on its outer peripheral surface, a circular flange portion 33 that abuts the end of the magnet 23 on one side L1, and a large-diameter tubular portion that protrudes from the flange portion 33 to the one side L1. a portion 34; The outer diameter dimension of the small diameter tubular portion 32 is smaller than the outer diameter dimension of the large diameter tubular portion 34 . The small-diameter tubular portion 32 and the large-diameter tubular portion 34 are provided coaxially. The small-diameter cylindrical portion 32 holds the radial bearing 22 inside.

磁石２３は、ネオジムボンド磁石である。この磁石２３は、全体が樹脂のスキン層で覆われる。磁石２３の外径寸法は、フランジ部３３の外径寸法と略同一である。磁石２３と小径筒部３２との間に接着剤を塗布することにより、磁石２３と小径筒部３２とは接着されている。 Magnet 23 is a neodymium bonded magnet. The magnet 23 is entirely covered with a resin skin layer. The outer diameter dimension of the magnet 23 is substantially the same as the outer diameter dimension of the flange portion 33 . By applying an adhesive between the magnet 23 and the small-diameter tubular portion 32, the magnet 23 and the small-diameter tubular portion 32 are adhered.

支持軸２４は、金属製の棒状部材である。支持軸２４の中心軸線がロータ３の回転中心軸線と一致する。支持軸２４の他方側Ｌ２の端部は、隔壁部材７に形成された孔部７４に圧入されている。支持軸２４の一方側Ｌ１の端部には、円環状のスラスト軸受２５が取り付けられている。スラスト軸受２５は、ラジアル軸受２２の一方側Ｌ１の端部と当接する。支持軸２４の一方側Ｌ１の端部は、ケース６に設けられた筒部２６に保持される。筒部２６は、ケース６の径方向の中央に設けられた吸入管６１の内周面から他方側Ｌ２へ延びる支持部２７に接続される。スラスト軸受２５は、ラジアル軸受２２と筒部２６との間に配置される。 The support shaft 24 is a rod-shaped member made of metal. The center axis of the support shaft 24 coincides with the rotation center axis of the rotor 3 . The end of the support shaft 24 on the other side L<b>2 is press-fitted into a hole 74 formed in the partition member 7 . An annular thrust bearing 25 is attached to the end of the support shaft 24 on one side L<b>1 . Thrust bearing 25 abuts on the end of radial bearing 22 on one side L<b>1 . An end portion of the support shaft 24 on one side L1 is held by a tubular portion 26 provided in the case 6 . The cylindrical portion 26 is connected to a support portion 27 extending from the inner peripheral surface of a suction pipe 61 provided in the radial center of the case 6 to the other side L2. Thrust bearing 25 is arranged between radial bearing 22 and tubular portion 26 .

ステータ４は、ステータコア４１と、ステータコア４１にインシュレータ４２を介して巻回されたコイル４３とを有する。詳細な説明を省略するが、ステータコア４１は、円環状に延在する円環部と、円環部から径方向の内側へ突出する複数の突極とを備える。コイル４３は、突極を覆うインシュレータ４２の径方向内側の端に設けられた第１鍔部４２１と径方向外側の端に設けられた第２鍔部４２２との間に巻回される。本形態において、モータ２は３相モータであり、コイル４３には、Ｕ相コイル、Ｖ相コイル、およびＷ相コイルが含まれている。 The stator 4 has a stator core 41 and a coil 43 wound around the stator core 41 via an insulator 42 . Although detailed description is omitted, the stator core 41 includes an annular portion extending in an annular shape and a plurality of salient poles protruding radially inward from the annular portion. The coil 43 is wound between a first collar portion 421 provided at the radial inner end of the insulator 42 covering the salient pole and a second collar portion 422 provided at the radial outer end. In this embodiment, motor 2 is a three-phase motor, and coil 43 includes a U-phase coil, a V-phase coil, and a W-phase coil.

回路基板２１は、ガラスエポキシ基板等のリジッド基板であり、平面状に形成されている。回路基板２１は、樹脂封止部材８の他方側Ｌ２の端部に配置され、ネジ等により樹脂封止部材８に固定される。回路基板２１は、樹脂封止部材８の他方側Ｌ２の端部に固定されたカバー１０によって覆われている。 The circuit board 21 is a rigid board such as a glass epoxy board, and is formed in a planar shape. The circuit board 21 is arranged at the end portion of the other side L2 of the resin sealing member 8 and fixed to the resin sealing member 8 with screws or the like. The circuit board 21 is covered with a cover 10 fixed to the end of the resin sealing member 8 on the other side L2.

（インペラ）
インペラ５は、樹脂製である。図２～図４に示すように、インペラ５は、円形の第１プレート５１と、第１プレート５１から一方側Ｌ１に突出するとともに周方向に一定の間隔で配置された複数の羽根部５２と、羽根部５２の他方側Ｌ２の先端部と当接する円形の第２プレート５３とを備える。第１プレート５１は、ロータ３のホルダ３１と一体に形成されており、ホルダ３１の大径筒部３４の一方側Ｌ１の端部から径方向外側へ延びている。 (impeller)
The impeller 5 is made of resin. As shown in FIGS. 2 to 4, the impeller 5 includes a circular first plate 51 and a plurality of blade portions 52 protruding from the first plate 51 to one side L1 and arranged at regular intervals in the circumferential direction. , and a circular second plate 53 that abuts on the tip portion of the blade portion 52 on the other side L2. The first plate 51 is formed integrally with the holder 31 of the rotor 3 and extends radially outward from the end of the large-diameter cylindrical portion 34 of the holder 31 on the one side L1.

（ケース）
ケース６は、樹脂製である。図１～図４に示すように、ケース６は、インペラ５に一方側Ｌ１で対向する対向壁６４と、周方向に延在する側壁６５と、側壁６５の他方側Ｌ２の端部から径方向の外側に広がる鍔部６６とを備える。対向壁６４および側壁６５は、ポンプ室６０を構成する。ケース６は、軸線方向Ｌに沿って延在する吸入管６１と、軸線方向Ｌに対して直交する方向に延在する吐出管６２とを備える。吸入管６１および吐出管６２は各々、端部に吸入口６１ａおよび吐出口６２ａを備える。吐出管６２は、インペラ５の径方向外側に位置する。ここで、モータ２の駆動によってロータ３と一体にインペラ５が回転中心軸線を中心に回転すると、羽根部５４によってポンプ室６０内の流体が回転方向に流動する。これにより、流体は、遠心力を生じて、径方向内側は低圧、径方向外側は高圧となって、ケース６の吸入口６１ａから吸入され、ケース６の吐出口６２ａから吐出される。 (Case)
The case 6 is made of resin. As shown in FIGS. 1 to 4, the case 6 includes a facing wall 64 facing the impeller 5 on one side L1, a side wall 65 extending in the circumferential direction, and radially extending from the end of the side wall 65 on the other side L2. and a collar portion 66 extending outwardly of the . The opposing wall 64 and side walls 65 constitute the pump chamber 60 . The case 6 includes a suction pipe 61 extending along the axial direction L and a discharge pipe 62 extending in a direction orthogonal to the axial direction L. As shown in FIG. The suction pipe 61 and the discharge pipe 62 each have a suction port 61a and a discharge port 62a at their ends. The discharge pipe 62 is located radially outside the impeller 5 . Here, when the impeller 5 rotates integrally with the rotor 3 around the rotation center axis by driving the motor 2 , the fluid in the pump chamber 60 flows in the rotation direction due to the vanes 54 . As a result, the fluid generates a centrifugal force, becomes low pressure on the radially inner side and high pressure on the radially outer side, is sucked from the suction port 61 a of the case 6 , and is discharged from the discharge port 62 a of the case 6 .

（隔壁部材）
隔壁部材７は、樹脂製である。図１～図４に示すように、隔壁部材７は、ケース６とともにポンプ室６０を区画する。後述するように、ケース６および隔壁部材７は、溶着によって固定される。そのため、ケース６および隔壁部材７は、同一の樹脂材料からなる。また、ケース６および隔壁部材７は、ポンプ室６０を区画するため、耐水性および耐薬品性に優れた第１の樹脂材料からなる。より具体的には、第１の樹脂材料は、ポリフェニレンサルファイド（ＰＰＳ：Ｐｏｌｙ Ｐｈｅｎｙｌｅｎｅ Ｓｕｌｆｉｄｅ）である。 (Partition member)
The partition member 7 is made of resin. As shown in FIGS. 1 to 4, the partition member 7 partitions the pump chamber 60 together with the case 6. As shown in FIGS. As will be described later, the case 6 and the partition member 7 are fixed by welding. Therefore, the case 6 and the partition member 7 are made of the same resin material. Further, the case 6 and the partition member 7 partition the pump chamber 60 and are therefore made of the first resin material that is excellent in water resistance and chemical resistance. More specifically, the first resin material is polyphenylene sulfide (PPS).

隔壁部材７は、ロータ３とステータ４との間に配置される円筒部７１と、円筒部７１の一方側Ｌ１の端部から径方向の外側に広がる鍔部７２と、円筒部７１の他方側Ｌ２の端部を塞ぐ端板部７３と、を備える。円筒部７１は、軸線方向Ｌに延在する。円筒部７１の内周面は、磁石２３の外周面と対向する。図２、図３に示すように、円筒部７１の外周面には、軸線方向Ｌに直線状に延びる複数の縦リブ７１ａが周方向に等間隔で並んでいる。また、端板部７３の中央部分には、支持軸２４の端部が圧入される孔部７４が設けられている（図４参照）。 The partition member 7 includes a cylindrical portion 71 arranged between the rotor 3 and the stator 4, a collar portion 72 extending radially outward from an end portion of one side L1 of the cylindrical portion 71, and the other side of the cylindrical portion 71. and an end plate portion 73 that closes the end of L2. The cylindrical portion 71 extends in the axial direction L. As shown in FIG. The inner peripheral surface of the cylindrical portion 71 faces the outer peripheral surface of the magnet 23 . As shown in FIGS. 2 and 3, on the outer peripheral surface of the cylindrical portion 71, a plurality of vertical ribs 71a linearly extending in the axial direction L are arranged at regular intervals in the circumferential direction. A hole portion 74 into which the end portion of the support shaft 24 is press-fitted is provided in the central portion of the end plate portion 73 (see FIG. 4).

鍔部７２の外径寸法は、ケース６の鍔部６６の外径寸法と同じである。鍔部７２は、他方側Ｌ２を向く環状の第１面７５を備えており、第１面７５には、回転中心軸線を中心に円弧状に延びるリブ７６が複数設けられている。図３に示すように、本形態では、同一円上に３本のリブ７６が周方向に等間隔で配置される。周方向で隣り合うリブ７６の間には、後述する固定機構９の第２固定部９６が配置される。各リブ７６の内周面は、隔壁部材７を一方側Ｌ１から樹脂封止部材８に重ねた際に、樹脂封止部材８の外周面８１ａに当接する。これにより、隔壁部材７は、樹脂封止部材８に対して、周方向に位置決めされる。 The outer diameter dimension of the collar portion 72 is the same as the outer diameter dimension of the collar portion 66 of the case 6 . The collar portion 72 has an annular first surface 75 facing the other side L2, and the first surface 75 is provided with a plurality of ribs 76 extending in an arc around the rotation center axis. As shown in FIG. 3, in this embodiment, three ribs 76 are arranged on the same circle at regular intervals in the circumferential direction. A second fixing portion 96 of the fixing mechanism 9, which will be described later, is arranged between the ribs 76 adjacent in the circumferential direction. The inner peripheral surface of each rib 76 contacts the outer peripheral surface 81a of the resin sealing member 8 when the partition member 7 is placed on the resin sealing member 8 from the one side L1. Thereby, the partition member 7 is positioned in the circumferential direction with respect to the resin sealing member 8 .

ケース６と隔壁部材７とは、溶着によって固定される。溶着方法としては、振動溶着や超音波溶着などが採用される。本形態では、ケース６の鍔部６６と隔壁部材７の鍔部７２との間には、ケース６と隔壁部材７とを接合する溶着部１１が設けられる。ケース６の鍔部６６は、他方側Ｌ２に突出する環状の溶着用凸部６６１を備える。隔壁部材７の鍔部７２は、溶着用凸部６６１に他方側Ｌ２から対向する環状の溶着用凹部７２１を備える。溶着用凹部７２１は、鍔部７２の外周縁から一方側Ｌ１に突出する環状凸部７２２の先端面
において一方側Ｌ１に開口する。ケース６の鍔部６６と隔壁部材７の環状凸部７２２とを軸線方向Ｌに当接させ、溶着用凸部６６１と溶着用凹部７２１とを嵌合させた状態で、振動溶着もしくは超音波溶着によって溶着用凸部６６１と溶着用凹部７２１を溶着することにより、環状の溶着部１１が形成される。なお、ケース６の鍔部６６に一方側Ｌ１に凹んだ溶着用凹部を設け、隔壁部材７の鍔部７２に一方側Ｌ１に突出する溶着用凸部を設けた構成を採用してもよい。 The case 6 and the partition member 7 are fixed by welding. As a welding method, vibration welding, ultrasonic welding, or the like is adopted. In this embodiment, a welding portion 11 for joining the case 6 and the partition member 7 is provided between the flange portion 66 of the case 6 and the flange portion 72 of the partition member 7 . The flange 66 of the case 6 has an annular welding protrusion 661 that protrudes toward the other side L2. The flange portion 72 of the partition member 7 has an annular welding concave portion 721 facing the welding convex portion 661 from the other side L2. The welding concave portion 721 opens to the one side L1 at the tip surface of the annular convex portion 722 that protrudes from the outer peripheral edge of the collar portion 72 to the one side L1. The flange 66 of the case 6 and the annular protrusion 722 of the partition member 7 are brought into contact with each other in the axial direction L, and the welding protrusion 661 and the welding recess 721 are fitted together, and vibration welding or ultrasonic welding is performed. By welding the welding convex portion 661 and the welding concave portion 721 together, the ring-shaped welded portion 11 is formed. Alternatively, the flange 66 of the case 6 may be provided with a welding recess recessed on one side L1, and the flange 72 of the partition member 7 may be provided with a welding projection projecting on the one side L1.

（樹脂封止部材）
樹脂封止部材８は、樹脂製である。図４に示すように、樹脂封止部材８は、ポンプ室６０を構成しないので、隔壁部材７およびケース６を構成する第１の樹脂材料とは異なる第２の樹脂材料によって形成される。第２の樹脂材料は、第１の樹脂材料より耐水性および耐薬品性が劣る樹脂材料が選択される。より具体的には、第２の樹脂材料は、ポリブチレンテレフタレート（ＰＢＴ：Ｐｏｌｙｂｕｔｙｌｅｎｅ ｔｅｒｅｐｈｔｈａｌａｔｅ）である。ポリブチレンテレフタレートは、ポリフェニレンサルファイドより耐水性および耐薬品性が劣る分、安価である。樹脂封止部材８は、ステータ４をインサート成形することによって形成されている。 (resin sealing member)
The resin sealing member 8 is made of resin. As shown in FIG. 4 , since the resin sealing member 8 does not form the pump chamber 60 , it is made of a second resin material different from the first resin material forming the partition member 7 and the case 6 . For the second resin material, a resin material having lower water resistance and chemical resistance than the first resin material is selected. More specifically, the second resin material is polybutylene terephthalate (PBT). Polybutylene terephthalate is less expensive than polyphenylene sulfide due to its inferior water and chemical resistance. The resin sealing member 8 is formed by insert-molding the stator 4 .

図１～図４に示すように、樹脂封止部材８は、ステータ４を封止する円筒状の本体部８１を備える。本体部８１の外周面８１ａは円筒形状である。本体部８１の外径寸法は、隔壁部材７の鍔部７２の外径寸法より小さい。本体部８１は、円筒部７１を囲む筒状の内周面８２と、内周面８２の一方側Ｌ１から径方向外側に広がるとともに、鍔部７２の第１面７５と軸線方向Ｌに対向する対向面８３を備える。内周面８２は、隔壁部材７の円筒部７１の外周面に接している。図２に示すように、内周面８２には、円筒部７１の縦リブ７１ａに対応する位置に、軸線方向Ｌに直線状に延びる縦溝８２ａが設けられている。したがって、隔壁部材７が一方側Ｌ１から樹脂封止部材８に重ねられた際、円筒部７１の縦リブ７１ａは内周面８２の縦溝８２ａに嵌め込まれる。これにより、隔壁部材７は、樹脂封止部材８に対して、周方向に位置決めされる。 As shown in FIGS. 1 to 4, the resin sealing member 8 includes a cylindrical body portion 81 that seals the stator 4. As shown in FIGS. An outer peripheral surface 81a of the body portion 81 is cylindrical. The outer diameter dimension of the body portion 81 is smaller than the outer diameter dimension of the flange portion 72 of the partition member 7 . The body portion 81 extends radially outward from a cylindrical inner peripheral surface 82 surrounding the cylindrical portion 71 and one side L1 of the inner peripheral surface 82 and faces the first surface 75 of the flange portion 72 in the axial direction L. A facing surface 83 is provided. The inner peripheral surface 82 is in contact with the outer peripheral surface of the cylindrical portion 71 of the partition member 7 . As shown in FIG. 2 , the inner peripheral surface 82 is provided with vertical grooves 82 a extending linearly in the axial direction L at positions corresponding to the vertical ribs 71 a of the cylindrical portion 71 . Therefore, when the partition member 7 is stacked on the resin sealing member 8 from one side L1, the vertical ribs 71a of the cylindrical portion 71 are fitted into the vertical grooves 82a of the inner peripheral surface 82. As shown in FIG. Thereby, the partition member 7 is positioned in the circumferential direction with respect to the resin sealing member 8 .

樹脂封止部材８は、筒状の本体部８１の他方側Ｌ２を塞ぐ底部８４と、本体部８１から他方側Ｌ２へ延びる円筒状の筒部８５を備える。筒部８５は、底部８４よりも他方側Ｌ２まで延びており、他方側Ｌ２に開口する。筒部８５の内部には、回路基板２１が収容される。回路基板２１は、ネジ等によって筒部８５の内部に固定される。底部８４は、本体部８１の内側の空間を回路基板２１が配置される空間から区画し、隔壁部材７の端板部７３を他方側Ｌ２から覆う。回路基板２１は、筒部８５の他方側の端部に固定されるカバー１０と底部８４との間に収容される。 The resin sealing member 8 includes a bottom portion 84 closing the other side L2 of the tubular main body portion 81, and a cylindrical tubular portion 85 extending from the main body portion 81 to the other side L2. The cylindrical portion 85 extends from the bottom portion 84 to the other side L2 and opens to the other side L2. The circuit board 21 is accommodated inside the cylindrical portion 85 . The circuit board 21 is fixed inside the cylindrical portion 85 with screws or the like. The bottom portion 84 separates the space inside the body portion 81 from the space in which the circuit board 21 is arranged, and covers the end plate portion 73 of the partition member 7 from the other side L2. The circuit board 21 is accommodated between the cover 10 fixed to the other end of the cylindrical portion 85 and the bottom portion 84 .

（固定機構）
図５は、固定機構９の斜視図である。図６は、固定機構９の分解斜視図である。固定機構９は、スナップフィット構造である。図５および図６に示すように、固定機構９は、樹脂封止部材８の外周面８１ａから径方向に突出する第１固定部９１と、鍔部７２の第１面７５から他方側Ｌ２に延びる第２固定部９６を備える。固定機構９は、周方向に等間隔で複数箇所に設けられている。図２および図３に示すように、本形態では、固定機構９は、周方向に等間隔で３つ設けられている。 (fixing mechanism)
5 is a perspective view of the fixing mechanism 9. FIG. 6 is an exploded perspective view of the fixing mechanism 9. FIG. The fixing mechanism 9 has a snap-fit structure. As shown in FIGS. 5 and 6, the fixing mechanism 9 includes a first fixing portion 91 radially protruding from the outer peripheral surface 81a of the resin sealing member 8, and a first fixing portion 91 extending from the first surface 75 of the flange portion 72 to the other side L2. An extending second fixing portion 96 is provided. The fixing mechanisms 9 are provided at a plurality of locations at equal intervals in the circumferential direction. As shown in FIGS. 2 and 3, in this embodiment, three fixing mechanisms 9 are provided at equal intervals in the circumferential direction.

図５および図６に示すように、第１固定部９１は、第１係止部９１ａと、第１係止部９１ａに対して周方向に離れた第２係止部９１ｂとを備える。第１係止部９１ａと第２係止部９１ｂとは、軸線方向Ｌに沿って延びる直線に対して線対称の形状を備える。第１係止部９１ａおよび第２係止部９１ｂは、それぞれ、他方側Ｌ２を向く係合面９２と、一方側Ｌ１を向く壁面９３と、壁面９３の端部から他方側Ｌ２に向かって外側に傾斜する傾斜面９４と、係合面９２と傾斜面９４と接続して軸線方向Ｌに延在する案内面９４ａとを備え
る。第１係止部９１ａの傾斜面９４と第２係止部９１ｂの傾斜面９４は周方向に対向する。また、第１係止部９１ａおよび第２係止部９１ｂは、壁面９３から一方側Ｌ１に突出する凸部９５を備える。 As shown in FIGS. 5 and 6, the first fixing portion 91 includes a first locking portion 91a and a second locking portion 91b circumferentially separated from the first locking portion 91a. The first locking portion 91a and the second locking portion 91b have shapes that are symmetrical with respect to a straight line extending along the axial direction L. As shown in FIG. The first locking portion 91a and the second locking portion 91b each have an engaging surface 92 facing the other side L2, a wall surface 93 facing the one side L1, and an end portion of the wall surface 93 facing outward toward the other side L2. and a guide surface 94a connecting the engaging surface 92 and the inclined surface 94 and extending in the axial direction L. As shown in FIG. The inclined surface 94 of the first engaging portion 91a and the inclined surface 94 of the second engaging portion 91b face each other in the circumferential direction. Further, the first locking portion 91a and the second locking portion 91b are provided with a convex portion 95 projecting from the wall surface 93 to the one side L1.

図５および図６に示すように、第２固定部９６は、第１係止部９１ａに係合する第１フック部９６ａと、第２係止部９１ｂに係合する第２フック部９６ｂとを備える。第１フック部９６ａと第２フック部９６ｂとは、軸線方向Ｌに沿って延びる直線に対して線対称の形状を備える。第１フック部９６ａおよび第２フック部９６ｂは、鍔部７２の第１面７５から突出し他方側Ｌ２を向く当接面９８ａを有する基部９８と、基部９８の当接面９８ａから他方側Ｌ２に延びるアーム部９９と、アーム部９９の先端に設けられた爪部９７とを備える。 As shown in FIGS. 5 and 6, the second fixing portion 96 includes a first hook portion 96a that engages with the first locking portion 91a and a second hook portion 96b that engages with the second locking portion 91b. Prepare. The first hook portion 96a and the second hook portion 96b have shapes that are symmetrical with respect to a straight line extending along the axial direction L. As shown in FIG. The first hook portion 96a and the second hook portion 96b have a base portion 98 that protrudes from the first surface 75 of the collar portion 72 and has a contact surface 98a that faces the other side L2, and a contact surface 98a of the base portion 98 that extends from the contact surface 98a to the other side L2. It has an extending arm portion 99 and a claw portion 97 provided at the tip of the arm portion 99 .

隔壁部材７を樹脂封止部材８に固定する際、隔壁部材７が一方側Ｌ１から樹脂封止部材８に重ねられると、第１フック部９６ａおよび第２フック部９６ｂは、第１係止部９１ａと第２係止部９１ｂとの間に一方側Ｌ１から挿入される。第１フック部９６ａおよび第２フック部９６ｂは、第１係止部９１ａと第２係止部９１ｂとの間を通過するときに爪部９７の先端が傾斜面９４に沿って移動し、アーム部９９が周方向に弾性変形する。爪部９７が第１係止部９１ａと第２係止部９１ｂの間を通りぬけると、アーム部９９が元の形状に復帰して爪部９７が係合面９２に他方側Ｌ２から係合する。これにより、隔壁部材７と樹脂封止部材８とは、固定機構９によって軸線方向Ｌに固定される。 When fixing the partition member 7 to the resin sealing member 8, when the partition member 7 is overlapped with the resin sealing member 8 from the one side L1, the first hook portion 96a and the second hook portion 96b are connected to the first locking portion. It is inserted from one side L1 between 91a and the second locking portion 91b. When the first hook portion 96a and the second hook portion 96b pass between the first locking portion 91a and the second locking portion 91b, the tip of the claw portion 97 moves along the inclined surface 94, and the arm The portion 99 elastically deforms in the circumferential direction. When the claw portion 97 passes through between the first locking portion 91a and the second locking portion 91b, the arm portion 99 returns to its original shape and the claw portion 97 engages the engaging surface 92 from the other side L2. do. Thereby, the partition member 7 and the resin sealing member 8 are fixed in the axial direction L by the fixing mechanism 9 .

第１係止部９１ａと第２係止部９１ｂの壁面９３から突出する凸部９５は、第１フック部９６ａおよび第２フック部９６ｂが第１係止部９１ａと第２係止部９１ｂとの間を通り抜けるまでの間に、基部９８の当接面９８ａに当接し、軸線方向Ｌに潰される潰し部９５ａを備える。これにより、第１係止部９１ａと第２係止部９１ｂは、それぞれ、爪部９７と当接面９８ａとの間に隙間なく挟まれる。よって、固定機構９は、第１固定部９１と第２固定部９６とが軸線方向Ｌに相対移動することが規制される。 The convex portion 95 protruding from the wall surface 93 of the first locking portion 91a and the second locking portion 91b is formed by the first hook portion 96a and the second hook portion 96b. It has a crushing portion 95a that contacts the contact surface 98a of the base portion 98 and is crushed in the axial direction L until it passes through the gap. As a result, the first locking portion 91a and the second locking portion 91b are respectively sandwiched between the claw portion 97 and the contact surface 98a without any gap. Therefore, in the fixing mechanism 9, relative movement in the axial direction L between the first fixing portion 91 and the second fixing portion 96 is restricted.

ここで、樹脂封止部材８の対向面８３と、対向面８３に一方側Ｌ１から重ねられる隔壁部材７の第１面７５との間には、環状の弾性部材１２が配置される。弾性部材１２は、Ｏリング１２０である。Ｏリング１２０は、対向面８３に設けられた環状の溝部８３ａに配置され、第１面７５に当接する。隔壁部材７と樹脂封止部材８とが固定機構９によって固定された際、Ｏリング１２０は、軸線方向Ｌに弾性変形した状態で、対向面８３と第１面７５とに密着している。 Here, an annular elastic member 12 is arranged between the opposing surface 83 of the resin sealing member 8 and the first surface 75 of the partition member 7 overlapping the opposing surface 83 from one side L1. The elastic member 12 is an O-ring 120 . The O-ring 120 is arranged in an annular groove portion 83 a provided in the opposing surface 83 and contacts the first surface 75 . When the partition member 7 and the resin sealing member 8 are fixed by the fixing mechanism 9 , the O-ring 120 is elastically deformed in the axial direction L and adheres tightly to the opposing surface 83 and the first surface 75 .

次に、隔壁部材７を樹脂封止部材８から外す際、第１フック部９６ａおよび第２フック部９６ｂの爪部９７が係合面９２から外れるように、アーム部９９を周方向に弾性変形させて爪部９７を周方向に移動させ、第１フック部９６ａと第２フック部９６ｂを周方向に当接させる。これにより、第１係止部９１ａの案内面９４ａと第２係止部９１ｂの案内面９４ａの間を第１フック部９６ａと第２フック部９６ｂが通過できるようになる。したがって、隔壁部材７を樹脂封止部材８に対して一方側Ｌ１に移動させれば、固定機構９は、第１固定部９１と第２固定部９６の係合が解除されるので、隔壁部材７を樹脂封止部材８から外すことができる。 Next, when the partition member 7 is removed from the resin sealing member 8, the arm portion 99 is elastically deformed in the circumferential direction so that the claw portions 97 of the first hook portion 96a and the second hook portion 96b are disengaged from the engaging surface 92. to move the claw portion 97 in the circumferential direction so that the first hook portion 96a and the second hook portion 96b are brought into contact with each other in the circumferential direction. As a result, the first hook portion 96a and the second hook portion 96b can pass between the guide surface 94a of the first locking portion 91a and the guide surface 94a of the second locking portion 91b. Therefore, if the partition member 7 is moved to the one side L1 with respect to the resin sealing member 8, the engagement between the first fixing portion 91 and the second fixing portion 96 of the fixing mechanism 9 is released. 7 can be removed from the resin sealing member 8 .

（作用効果）
本形態のポンプ装置１は、インペラ５を収容するポンプ室６０を区画するケース６と、ケース６が被せられてポンプ室６０を区画する隔壁部材７とが溶着によって固定される。また、隔壁部材７と樹脂封止部材８とが固定機構９によって軸線方向Ｌに着脱可能に固定される。したがって、ケース６と隔壁部材７との溶着不良が生じても、隔壁部材７を樹脂封止部材８から外すことができるので、ステータ４を覆う樹脂封止部材８を廃棄する必要
がない。これにより、ポンプ装置１の製造コストを抑制することができる。 (Effect)
In the pump device 1 of this embodiment, a case 6 that defines a pump chamber 60 that houses an impeller 5 and a partition member 7 that is covered with the case 6 and defines the pump chamber 60 are fixed by welding. Further, the partition member 7 and the resin sealing member 8 are detachably fixed in the axial direction L by the fixing mechanism 9 . Therefore, even if a welding failure occurs between the case 6 and the partition member 7, the partition member 7 can be removed from the resin sealing member 8, so the resin sealing member 8 covering the stator 4 need not be discarded. Thereby, the manufacturing cost of the pump device 1 can be suppressed.

また、ケース６および隔壁部材７は、第１の樹脂材料によって形成され、樹脂封止部材８は、第１の樹脂材料とは異なる第２の樹脂材料によって形成される。より具体的には、ケース６および隔壁部材７は、ポリフェニレンサルファイドによって形成され、樹脂封止部材８は、ポリブチレンテレフタレートによって形成される。ここで、ポリブチレンテレフタレートは、ポリフェニレンサルファイドより耐水性および耐薬品性が劣る分、安価である。したがって、樹脂封止部材を第１の樹脂材料であるポリフェニレンサルファイドによって形成した場合と比較して、ポンプ装置１の製造コストを抑制することができる。なお、第１の樹脂材料は、ポリフェニレンサルファイドに限定されない。第２の樹脂材料は、ポリブチレンテレフタレートに限定されない。 The case 6 and the partition member 7 are made of a first resin material, and the resin sealing member 8 is made of a second resin material different from the first resin material. More specifically, the case 6 and the partition member 7 are made of polyphenylene sulfide, and the resin sealing member 8 is made of polybutylene terephthalate. Here, polybutylene terephthalate is less expensive than polyphenylene sulfide in water resistance and chemical resistance. Therefore, the manufacturing cost of the pump device 1 can be suppressed as compared with the case where the resin sealing member is made of polyphenylene sulfide, which is the first resin material. Note that the first resin material is not limited to polyphenylene sulfide. The second resin material is not limited to polybutylene terephthalate.

本形態のポンプ装置１では、隔壁部材７は、ロータ３とステータ４との間に配置される円筒部７１と、円筒部７１の一方側Ｌ１の端部から径方向の外側に広がる鍔部７２と、円筒部７１の他方側Ｌ２の端部を塞ぐ端板部７３と、を備える。また、固定機構９は、樹脂封止部材８の外周面８１ａに設けられた第１固定部９１と、鍔部７２から他方側Ｌ２へ延びて第１固定部９１と係合する第２固定部９６とを備える。よって、樹脂封止部材８に設けられた第１固定部９１と隔壁部材７に設けられた第２固定部９６とで軸線方向Ｌに着脱可能な固定機構９を構成できる。 In the pump device 1 of this embodiment, the partition member 7 includes a cylindrical portion 71 arranged between the rotor 3 and the stator 4, and a flange portion 72 extending radially outward from the end of the cylindrical portion 71 on one side L1. and an end plate portion 73 that closes the end of the cylindrical portion 71 on the other side L2. The fixing mechanism 9 also includes a first fixing portion 91 provided on the outer peripheral surface 81a of the resin sealing member 8, and a second fixing portion extending from the collar portion 72 to the other side L2 and engaging with the first fixing portion 91. 96. Therefore, the first fixing portion 91 provided on the resin sealing member 8 and the second fixing portion 96 provided on the partition member 7 can constitute the fixing mechanism 9 that can be attached and detached in the axial direction L. As shown in FIG.

本形態のポンプ装置１では、樹脂封止部材８は、円筒部７１を内側に収容しステータ４を封止する筒状の本体部８１を備え、本体部８１は、鍔部７２と軸線方向Ｌに対向する環状の対向面８３を備える。また、対向面８３と鍔部７２の第１面７５との間には、環状の弾性部材１２が弾性変形した状態で配置される。したがって、対向面８３と鍔部７２との間において、弾性部材１２の弾性復帰力が軸線方向Ｌに働くので、固定機構９によって隔壁部材７と樹脂封止部材８とを固定した際、隔壁部材７と樹脂封止部材８とがガタつくことを抑制することができる。 In the pump device 1 of this embodiment, the resin sealing member 8 includes a cylindrical body portion 81 that accommodates the cylindrical portion 71 inside and seals the stator 4 . It has an annular facing surface 83 facing the . Between the facing surface 83 and the first surface 75 of the flange portion 72, the annular elastic member 12 is arranged in an elastically deformed state. Therefore, since the elastic restoring force of the elastic member 12 acts in the axial direction L between the opposing surface 83 and the flange portion 72, when the partition member 7 and the resin sealing member 8 are fixed by the fixing mechanism 9, the partition member 7 and the resin sealing member 8 can be suppressed from rattling.

本形態のポンプ装置１では、モータ２は、ステータ４のコイル４３に接続される回路基板２１を備える。樹脂封止部材８は、本体部８１の他方側Ｌ２を塞ぐ底部８４と、本体部８１から他方側Ｌ２へ延びる筒部８５とを備えており、回路基板２１は、筒部８５の内側に収容される。したがって、ポンプ室６０等から漏れた液体が弾性部材１２を通過して内周面８２まで侵入しても、本体部８１の内側は、底部８４によって、筒部８５の内部と隔てられているので、液体が回路基板２１に到達することを抑制することができる。 In the pump device 1 of this embodiment, the motor 2 includes a circuit board 21 connected to the coils 43 of the stator 4 . The resin sealing member 8 includes a bottom portion 84 closing the other side L2 of the main body portion 81 and a cylindrical portion 85 extending from the main body portion 81 to the other side L2. be done. Therefore, even if liquid leaking from the pump chamber 60 or the like passes through the elastic member 12 and reaches the inner peripheral surface 82, the inside of the body portion 81 is separated from the inside of the cylindrical portion 85 by the bottom portion 84. , the liquid can be suppressed from reaching the circuit board 21 .

本形態の固定機構９において、第１固定部９１は、第１係止部９１ａと、第１係止部９１ａに対して周方向に離隔した第２係止部９１ｂを備える。第２固定部９６は、第１係止部９１ａと第２係止部９１ｂの間に挿入される第１フック部９６ａおよび第２フック部９６ｂを備える。第１フック部９６ａと第２フック部９６ｂのそれぞれは、他方側Ｌ２へ延びるアーム部９９と、アーム部９９の先端に設けられた爪部９７を備える。第１係止部９１ａと第２係止部９１ｂのそれぞれは、他方側Ｌ２を向く係合面９２を備え、係合面９２に爪部９７が他方側Ｌ２から係合する。このような構成により、スナップフィット構造の固定機構９を構成することができ、アーム部９９を撓ませることによって爪部９７と係合面９２とを機械的に係合させることができる。したがって、容易に着脱可能で、且つ、ガタつきの少ない固定機構９を構成できる。 In the fixing mechanism 9 of this embodiment, the first fixing portion 91 includes a first locking portion 91a and a second locking portion 91b spaced apart from the first locking portion 91a in the circumferential direction. The second fixing portion 96 includes a first hook portion 96a and a second hook portion 96b that are inserted between the first locking portion 91a and the second locking portion 91b. Each of the first hook portion 96 a and the second hook portion 96 b includes an arm portion 99 extending to the other side L<b>2 and a claw portion 97 provided at the tip of the arm portion 99 . Each of the first locking portion 91a and the second locking portion 91b has an engaging surface 92 facing the other side L2, and a claw portion 97 engages with the engaging surface 92 from the other side L2. With such a configuration, the fixing mechanism 9 having a snap-fit structure can be configured, and the claw portion 97 and the engaging surface 92 can be mechanically engaged by bending the arm portion 99 . Therefore, it is possible to configure the fixing mechanism 9 which can be easily attached and detached and which has less backlash.

本形態の固定機構９において、鍔部７２は、他方側Ｌ２を向く第１面７５を備える。第１フック部９６ａと第２フック部９６ｂのそれぞれは、第１面７５から他方側Ｌ２へ突出する基部９８を備え、アーム部９９は、基部９８から他方側Ｌ２へ延びている。第１係止部９１ａと第２係止部９１ｂのそれぞれは、基部９８に対して軸線方向Ｌに対向する壁面
９３と、壁面９３から一方側Ｌ１へ突出する凸部９５を備える。係合面９２に爪部９７が他方側Ｌ２から係合する際、凸部９５は基部９８に他方側Ｌ２から当接して軸線方向Ｌに潰されるので、第１固定部９１と第２固定部９６の寸法精度および位置精度が低くても、凸部９５を潰すことによって隔壁部材７と樹脂封止部材８との軸線方向Ｌの隙間をなくすことができる。したがって、隔壁部材７と樹脂封止部材８との軸線方向Ｌのガタつきを抑制できる。 In the fixing mechanism 9 of this embodiment, the collar portion 72 has a first surface 75 facing the other side L2. Each of the first hook portion 96a and the second hook portion 96b has a base portion 98 projecting from the first surface 75 to the other side L2, and the arm portion 99 extends from the base portion 98 to the other side L2. Each of the first locking portion 91a and the second locking portion 91b has a wall surface 93 facing the base portion 98 in the axial direction L, and a convex portion 95 projecting from the wall surface 93 to the one side L1. When the claw portion 97 is engaged with the engaging surface 92 from the other side L2, the convex portion 95 contacts the base portion 98 from the other side L2 and is crushed in the axial direction L. Even if the dimensional accuracy and positional accuracy of 96 are low, the gap in the axial direction L between partition member 7 and resin sealing member 8 can be eliminated by crushing convex portion 95 . Therefore, rattling in the axial direction L between the partition member 7 and the resin sealing member 8 can be suppressed.

本形態のポンプ装置１では、固定機構９は、軸線の周方向に等間隔で３つ設けられる。したがって、隔壁部材７を樹脂封止部材８に対して均等に固定することができる。 In the pump device 1 of this embodiment, three fixing mechanisms 9 are provided at equal intervals in the circumferential direction of the axis. Therefore, the partition member 7 can be uniformly fixed to the resin sealing member 8 .

（変形例）
（１）上記形態では、第１係止部９１ａと第２係止部９１ｂのそれぞれが凸部９５を備えているが、第１係止部９１ａと第２係止部９１ｂの一方のみが基部９８と軸線方向Ｌに対向する壁面９３から一方側Ｌ１へ突出する凸部９５を備えている構成とすることができる。 (Modification)
(1) In the above embodiment, each of the first locking portion 91a and the second locking portion 91b has the convex portion 95, but only one of the first locking portion 91a and the second locking portion 91b has a base portion. A wall surface 93 opposite to 98 in the axial direction L may be provided with a protrusion 95 protruding to one side L1.

（２）上記形態では、第１固定部９１（第１係止部９１ａおよび第２係止部９１ｂ）は、樹脂封止部材８の外周面８１ａから径方向に突出する突出部であるが、樹脂封止部材８の外周面８１ａに第２固定部９６が一方側Ｌ１から挿入される凹部を形成し、凹部の内面に第１固定部９１を設けた構成とすることもできる。 (2) In the above embodiment, the first fixing portion 91 (the first locking portion 91a and the second locking portion 91b) is a projecting portion radially projecting from the outer peripheral surface 81a of the resin sealing member 8. A recess into which the second fixing portion 96 is inserted from one side L1 may be formed on the outer peripheral surface 81a of the resin sealing member 8, and the first fixing portion 91 may be provided on the inner surface of the recess.

１…ポンプ装置、２…モータ、２…前記第、３…ロータ、４…ステータ、５…インペラ、６…ケース、７…隔壁部材、８…樹脂封止部材、９…固定機構、１０…カバー、１１…溶着部、１２…弾性部材、２１…回路基板、２２…ラジアル軸受、２３…磁石、２４…支持軸、２５…スラスト軸受、２６…筒部、２７…支持部、３１…ホルダ、３２…小径筒部、３３…当接部、３４…大径筒部、４１…ステータコア、４２…インシュレータ、４３…コイル、５１…第１プレート、５２…羽根部、５３…第２プレート、５４…羽根部、６０…ポンプ室、６１…吸入管、６１ａ…吸入口、６２…吐出管、６２ａ…吐出口、６４…対向壁、６５…側壁、６６…鍔部、７１…円筒部、７１ａ…縦リブ、７２…鍔部、７３…端板部、７４…孔部、７５…第１面、７６…リブ、８１ａ…外周面、８１…本体部、８２…内周面、８２ａ…縦溝、８３…対向面、８３ａ…溝部、８４…底部、８５…筒部、９１…第１固定部、９１ａ…第１係止部、９１ｂ…第２係止部、９２…係合面、９３…壁面、９４…傾斜面、９４ａ…案内面、９５…凸部、９５ａ…潰し部、９６…第２固定部、９６ａ…第１フック部、９６ｂ…第２フック部、９７…爪部、９８…基部、９８ａ…当接面、９９…アーム部、１２０…Ｏリング、４２１…第１鍔部、４２２…第２鍔部、６６１…溶着用凸部、７２１…溶着用凹部、７２２…環状凸部、Ｌ…軸線方向、Ｌ１…一方側、Ｌ２…他方側

DESCRIPTION OF SYMBOLS 1... Pump apparatus, 2... Motor, 2... Said 3... Rotor, 4... Stator, 5... Impeller, 6... Case, 7... Partition member, 8... Resin sealing member, 9... Fixing mechanism, 10... Cover DESCRIPTION OF SYMBOLS 11... Welding part 12... Elastic member 21... Circuit board 22... Radial bearing 23... Magnet 24... Support shaft 25... Thrust bearing 26... Cylindrical part 27... Support part 31... Holder 32 Small-diameter tubular portion 33 Contact portion 34 Large-diameter tubular portion 41 Stator core 42 Insulator 43 Coil 51 First plate 52 Blade portion 53 Second plate 54 Blade Portion 60 Pump chamber 61 Suction pipe 61a Suction port 62 Discharge pipe 62a Discharge port 64 Opposing wall 65 Side wall 66 Collar 71 Cylindrical portion 71a Vertical rib , 72... brim portion 73... end plate portion 74... hole portion 75... first surface 76... rib 81a... outer peripheral surface 81... main body portion 82... inner peripheral surface 82a... vertical groove 83... Opposing surface 83a Groove 84 Bottom 85 Cylindrical portion 91 First fixing portion 91a First locking portion 91b Second locking portion 92 Engaging surface 93 Wall surface 94 Inclined surface 94a Guide surface 95 Convex portion 95a Crushing portion 96 Second fixing portion 96a First hook portion 96b Second hook portion 97 Claw portion 98 Base portion 98a Contact surface 99 Arm portion 120 O-ring 421 First flange 422 Second flange 661 Welding projection 721 Welding recess 722 Annular projection L Axial direction, L1...one side, L2...other side

Claims (9)

ロータおよび前記ロータの外周側に筒状に配置されたステータを備えるモータと、
前記ロータの回転中心軸線が延在する軸線方向の一方側に配置され、前記ロータと一体に回転する樹脂製のインペラと、
前記インペラを収容するポンプ室を区画するケースと、
前記一方側から前記ケースが被せられて前記ポンプ室を区画するとともに、前記ロータと前記ステータとの間に配置される隔壁部材と、
前記ステータを覆うとともに前記隔壁部材が前記一方側から重ねられる樹脂封止部材と、
前記隔壁部材と前記樹脂封止部材とを着脱可能に固定する固定機構とを有し、
前記ケースおよび前記隔壁部材は、第１の樹脂材料によって形成され、
前記樹脂封止部材は、前記第１の樹脂材料とは異なる第２の樹脂材料によって形成され、
前記ケースと前記隔壁部材とは、溶着によって固定されることを特徴とするポンプ装置。 a motor comprising a rotor and a stator cylindrically arranged on the outer peripheral side of the rotor;
a resin impeller arranged on one side in the axial direction along which the rotation center axis of the rotor extends and rotating integrally with the rotor;
a case defining a pump chamber that houses the impeller;
a partition member covered with the case from one side to partition the pump chamber and arranged between the rotor and the stator;
a resin sealing member that covers the stator and overlaps the partition member from the one side;
a fixing mechanism for detachably fixing the partition member and the resin sealing member;
the case and the partition member are made of a first resin material,
The resin sealing member is made of a second resin material different from the first resin material,
The pump device, wherein the case and the partition member are fixed by welding. 前記第１の樹脂材料は、ポリフェニレンサルファイドであり、
前記第２の樹脂材料は、ポリブチレンテレフタレートであることを特徴とする請求項１に記載のポンプ装置。 The first resin material is polyphenylene sulfide,
2. The pump device according to claim 1, wherein said second resin material is polybutylene terephthalate. 前記固定機構は、スナップフィット構造であることを特徴とする請求項１または２に記載のポンプ装置。 3. The pump device according to claim 1, wherein the fixing mechanism has a snap-fit structure. 前記隔壁部材は、前記ロータと前記ステータとの間に配置される円筒部と、前記円筒部の前記一方側の端部から径方向の外側に広がる鍔部と、前記円筒部の前記軸線方向の他方側の端部を塞ぐ端板部と、を備え、
前記固定機構は、前記樹脂封止部材の外周面に設けられた第１固定部と、前記鍔部から前記他方側へ延びて前記第１固定部と係合する第２固定部とを備えることを特徴とする請求項３に記載のポンプ装置。 The partition member includes a cylindrical portion arranged between the rotor and the stator, a flange extending radially outward from the one end of the cylindrical portion, and an end plate portion that closes the end on the other side,
The fixing mechanism includes a first fixing portion provided on the outer peripheral surface of the resin sealing member, and a second fixing portion extending from the flange portion to the other side and engaging with the first fixing portion. 4. The pump device according to claim 3, characterized by: 前記樹脂封止部材は、前記円筒部を内側に収容し前記ステータを封止する筒状の本体部を備え、
前記本体部は、前記鍔部と前記軸線方向に対向する対向面を備え、
前記対向面と前記鍔部との間には、環状の弾性部材が前記軸線方向に弾性変形した状態で配置されることを特徴とする請求項４に記載のポンプ装置。 The resin sealing member includes a cylindrical main body that accommodates the cylindrical portion inside and seals the stator,
The body portion has a facing surface facing the flange portion in the axial direction,
5. The pump device according to claim 4, wherein an annular elastic member is arranged between the facing surface and the flange portion while being elastically deformed in the axial direction. 前記モータは、回路基板を備え、
前記樹脂封止部材は、前記本体部の前記他方側を塞ぐ底部と、前記本体部から前記底部の前記他方側へ延びる筒部とを備え、
前記回路基板は、前記筒部の内側に収容されることを特徴とする請求項５に記載のポンプ装置。 the motor comprises a circuit board,
The resin sealing member includes a bottom portion closing the other side of the main body portion, and a tubular portion extending from the main body portion to the other side of the bottom portion,
6. The pump device according to claim 5, wherein the circuit board is accommodated inside the cylindrical portion. 前記第１固定部は、第１係止部と、前記第１係止部に対して周方向に離隔した第２係止部を備え、
前記第２固定部は、前記第１係止部と前記第２係止部の間に挿入される第１フック部および第２フック部を備え、
前記第１フック部と前記第２フック部のそれぞれは、前記他方側へ延びるアーム部と、前記アーム部の先端に設けられた爪部を備え、
前記第１係止部と前記第２係止部のそれぞれは、前記他方側を向く係合面を備え、
前記係合面に前記爪部が他方側から係合することを特徴とする請求項４から６の何れか一項に記載のポンプ装置。 The first fixing portion includes a first locking portion and a second locking portion that is circumferentially separated from the first locking portion,
The second fixing portion includes a first hook portion and a second hook portion inserted between the first locking portion and the second locking portion,
Each of the first hook portion and the second hook portion includes an arm portion extending to the other side and a claw portion provided at the tip of the arm portion,
each of the first locking portion and the second locking portion has an engaging surface facing the other side;
The pump device according to any one of claims 4 to 6, wherein the claw portion engages with the engaging surface from the other side. 前記鍔部は、前記他方側を向く第１面を備え、
前記第１フック部と前記第２フック部の少なくとも一方は、前記第１面から前記他方側へ突出する基部を備え、前記アーム部は、前記基部から前記他方側へ延びており、
前記第１係止部と前記第２係止部の少なくとも一方は、前記基部に対して前記軸線方向に対向する壁面と、前記壁面から前記一方側へ突出する凸部を備え、
前記係合面に前記爪部が前記他方側から係合する際、前記凸部は、前記基部に前記他方側から当接して前記軸線方向に潰されることを特徴とする請求項７に記載のポンプ装置。 The collar portion has a first surface facing the other side,
At least one of the first hook portion and the second hook portion has a base projecting from the first surface to the other side, and the arm portion extends from the base to the other side,
At least one of the first locking portion and the second locking portion includes a wall surface facing the base portion in the axial direction and a convex portion projecting from the wall surface to the one side,
8. The method according to claim 7, wherein when the claw portion engages with the engaging surface from the other side, the convex portion abuts against the base portion from the other side and is crushed in the axial direction. pump device. 前記固定機構は、前記軸線の周方向に等間隔で複数設けられることを特徴とする請求項１から８のうち何れか一項に記載のポンプ装置。 9. The pump device according to any one of claims 1 to 8, wherein a plurality of said fixing mechanisms are provided at equal intervals in the circumferential direction of said axis.
JP2022006974A 2022-01-20 2022-01-20 Pump device Pending JP2023105938A (en)

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