Sealed pump

Abstract

The present application provides a kind of sealed pump, by the structure of engagement mechanism, configuration is improved, can ensure compact and reliable engagement state.The sealed pump (100) of the present application has: rotor unit (10);Stator unit (50) has coil shell (90);And engagement mechanism, in the state of the detachable rotor unit (10) and stator unit (50) assembly, the insertion part (32d) of rotor unit (10) is inserted in the bottom surface opening portion (90aa) of coil shell (90), and the insertion part (32d) of rotor unit (10) and the bottom surface opening portion peripheral wall (90d) of the bottom surface opening portion (90aa) are mutually engaged, engagement mechanism has rotation-preventing mechanism and axial direction anti-disengagement mechanism, which limit the relative rotation direction and the movement of axis (L) direction of rotor unit (10) and stator unit (50) respectively.

Description

Technical Field

[0001] The present invention relates to a sealed pump having an engaging mechanism in which the peripheral walls of the bottom opening of the rotor unit and the bottom opening of the coil housing engage with each other. Background Technology

[0002] In the past, sealed pumps had a detachable locking mechanism for the rotor and stator units in order to improve the efficiency of on-site installation.

[0003] For example, in patent document 1, such as Figure 13 As shown, a sealed pump 1300 (hereinafter referred to as a "conventional sealed pump") is described, comprising: a rotor unit 1310, which houses an impeller component 1321 having a rotor magnet 1322 rotatable about an axis L within a main body housing 1330; and a stator unit 1350 having a stator 1360 and a base plate 1370 connected to the stator 1360. Here, a blade housing portion 1332b, a rotor magnet housing portion 1332c, and a shaft fixing component housing portion 1332d are provided on the other side of the main body housing 1330. Furthermore, a coil 1363 is wound around the stator 1360 in a coil frame housing 1362 covering a portion of the stator core 1361.

[0004] Furthermore, in the existing sealed pump 1300, when the rotor unit 1310 is removed from the stator unit 1350, in order to prevent physical contact with the coil 1363 or the adhesion of foreign objects such as dust, the coil cover 1380 and the coil housing 1390 are respectively fixed to one side (upper side in the figure) and the other side (lower side in the figure) of the coil frame housing 1362 to cover the coil 1363. Moreover, in the existing sealed pump 1300, the detachable engaging mechanism 1305 for the rotor unit 1310 and the stator unit 1350 includes a rotor unit side engaging mechanism 1305a provided in the blade receiving part 1332b and a stator unit side engaging mechanism 1305b provided in the coil cover 1380.

[0005] Here, in the existing sealed pump 1300, such as Figure 14 As shown, when assembling the stator unit 1350 onto the rotor unit 1310, firstly, the stator unit 1350 is moved relative to the rotor unit 1310 along the axis L, so that the shaft fixing component housing portion 1332d of the main body housing 1330 is housed in the housing recess 1390d of the coil housing 1390. Figure 14 The direction of movement is M1401. Then, the stator unit 1350 is rotated relative to the rotor unit 1310 about the axis L, so that the rotor unit side engaging mechanism 1305a and the stator unit side engaging mechanism 1305b engage with each other. Figure 14 The rotation direction in M1402).

[0006] Thus, in the existing sealed pump 1300, the engaging mechanism 1305 is located between the rotor unit 1310 and the stator unit 1350 in the direction of axis L. Therefore, there is a concern that it is difficult to reduce the height in the structure (hereinafter referred to as "existing problem 1 (difficulty in reducing the height of the sealed pump)").

[0007] Furthermore, in the existing sealed pump 1300, the assembled engagement mechanism 1305 cannot be directly visually inspected from the outside. Therefore, after assembly, to confirm the engagement state of the engagement mechanism 1305, it is necessary to rely on the operator's fingertip feel. Specifically, after assembly, the operator applies a load manually between the rotor unit 1310 and the stator unit 1350 by gradually increasing the relative rotational torque, and judges the engagement state based on whether relative rotational movement occurs between the rotor unit 1310 and the stator unit 1350. Therefore, there is a concern that the assembled engagement mechanism 1305 may not maintain an adequate engagement state (hereinafter referred to as "existing problem point 2 (inadequate engagement state caused by inability to visually inspect the engagement mechanism)").

[0008] Existing technical documents

[0009] Patent documents

[0010] Patent Document 1: Japanese Patent Application Publication No. 2015-72018 Summary of the Invention

[0011] The problem that the invention aims to solve

[0012] The purpose of this invention is to provide a sealed pump that, by improving the structure and configuration of the engagement mechanism, can ensure a compact and reliable engagement state.

[0013] Solution for solving the problem

[0014] To address the aforementioned issues, a sealed pump is provided, comprising: a rotor unit having a rotor with a rotor magnet mounted on an impeller component and rotating about an axis, and a main housing housing the rotor; a stator unit having a stator with a coil wound around a stator core through a coil housing, a base plate fixed to the other side of the coil housing, and a coil housing disposed on the other side of the base plate to protect the coil; and a locking mechanism that, in an assembled state where the rotor unit and the stator unit are detachable and the rotor magnet is disposed inside the stator in the radial direction, inserts the insertion portion of the rotor unit into the bottom opening of the coil housing, and engages the insertion portion of the rotor unit with the peripheral wall of the bottom opening defining the bottom opening, wherein the locking mechanism includes an anti-rotation mechanism that restricts the relative rotational direction and axial direction movement of the rotor unit and the stator unit, respectively, and an axial direction anti-disengagement mechanism.

[0015] Alternatively, in the aforementioned sealed pump, the aforementioned anti-rotation mechanism may be a keyway engagement, which is composed of a key portion provided on either the aforementioned insertion portion or the peripheral wall of the aforementioned bottom opening portion and extending along the axial direction, and a groove portion provided on either of the other portions and extending along the axial direction, and when viewed from the axial direction, the aforementioned key portion and the aforementioned groove portion engage.

[0016] Alternatively, in the aforementioned sealed pump, the axial anti-disengagement mechanism may be a snap-fit ​​mechanism. This snap-fit ​​mechanism consists of a protrusion that is provided on either the insertion part or the peripheral wall of the bottom opening and protrudes in the radial direction, and a recess that is provided on the other side and has a radially recessed shape capable of receiving the protrusion. When viewed from a direction orthogonal to the axis, the protrusion and the recess engage due to the radial force generated between the insertion part and the peripheral wall of the bottom opening.

[0017] Alternatively, in the aforementioned sealed pump, the insertion portion of the rotor unit may include a circular plate-shaped mounting member. This circular plate-shaped mounting member has a circular plate-shaped fixing portion and an extension portion extending from the inner periphery of the circular plate-shaped fixing portion toward the other end in the axial direction. The aforementioned anti-rotation mechanism and the aforementioned axial direction anti-detachment mechanism are provided in the aforementioned extension portion of the circular plate-shaped mounting member.

[0018] Alternatively, in the aforementioned sealed pump, the insertion portion of the rotor unit may have a cylindrical mounting member. This cylindrical mounting member has a cylindrical fixing portion with a cylindrical shape, and a portion of the periphery of the other end of the cylindrical fixing portion that protrudes outward in the radial direction when viewed from the axial direction and is inclined to the axis when viewed from a direction orthogonal to the axis. The aforementioned anti-rotation mechanism and the aforementioned axial direction anti-detachment mechanism are provided on the inclined portion of the cylindrical mounting member.

[0019] Invention Effects

[0020] According to the present invention, by improving the structure and configuration of the engagement mechanism, a compact and reliable engagement sealing pump can be provided. Attached Figure Description

[0021] Figure 1 A longitudinal sectional view showing the sealed pump of the first embodiment.

[0022] Figure 2 express Figure 1 The sectional view shown is II-II.

[0023] Figure 3 express Figure 1 The image shows an exploded perspective view of the sealed pump.

[0024] Figure 4 yes Figure 3 The diagrams shown depict the coil housing and the circular plate-shaped mounting component. (a) is a top view of the coil housing, (b) is a bottom perspective view of the coil housing, (c) is a top view of the circular plate-shaped mounting component, and (d) is a top perspective view of the circular plate-shaped mounting component.

[0025] Figure 5 yes Figure 1 The diagram illustrates the assembly process of the rotor unit and stator unit. (a) shows the approach movement state of the rotor unit and stator unit, and (b) shows the insertion state of the engaging mechanism.

[0026] Figure 6 This is an enlarged view of the engaging mechanism of the first embodiment, (a) showing the mechanism consisting of... Figure 5 (b) is an enlarged view of the area enclosed by the dashed line VIA. (b) represents the area enclosed by the dashed line VIA. Figure 1 The enlarged view of the area enclosed by the dashed line VIb is shown.

[0027] Figure 7 An enlarged view showing the engaging mechanism of Modified Example 1 of the first embodiment (and...) Figure 6 (b) corresponds to the diagram.

[0028] Figure 8 yes Figure 7 The diagram showing the coil housing and the circular mounting plate, (a) is a top view of the coil housing (and...). Figure 4 (a) corresponds to the figure, (b) represents a top perspective view of the coil housing, and (c) represents a top view of the circular plate-shaped mounting component (and...). Figure 4 (c) corresponds to the figure, and (d) represents the top perspective view of the circular plate-shaped mounting component (and...). Figure 4 (d) corresponds to the diagram.

[0029] Figure 9 This is an explanatory diagram showing a modified example 2 of the locking mechanism according to the first embodiment. (a) shows an enlarged view of the locking mechanism (and...). Figure 6 (b) corresponds to the figure, where (b) represents a top perspective view of the circular plate-shaped mounting component (and...). Figure 4 (d) corresponds to the figure, and (c) represents the side view of the circular plate-shaped mounting component.

[0030] Figure 10 This is an explanatory diagram showing a variation of the engaging mechanism 3 of the first embodiment. (a) shows an enlarged view of the engaging mechanism (and...). Figure 6 (b) corresponds to the figure, where (b) represents a top perspective view of the circular plate-shaped mounting component (and...). Figure 4 (d) corresponds to the figure, and (c) represents the side view of the circular plate-shaped mounting component (with...). Figure 9 (c) corresponds to the diagram.

[0031] Figure 11 Enlarged view showing the engagement mechanism of the second embodiment (and) Figure 6 (b) corresponds to the diagram.

[0032] Figure 12 yes Figure 11 The illustrated diagram of the coil housing and cylindrical mounting component, (a) shows a top view of the coil housing (and...). Figure 4 (a) corresponds to the figure, and (b) represents a bottom-view perspective of the coil housing (and...). Figure 4 (b) corresponds to the figure, and (c) represents the top view of the cylindrical mounting component (as opposed to...). Figure 4 (c) corresponds to the figure, (d) represents the front view of the cylindrical mounting component, and (e) represents the top perspective view of the cylindrical mounting component (and...). Figure 4 (d) corresponds to the diagram.

[0033] Figure 13 A cross-sectional view showing a conventional sealed pump.

[0034] Figure 14 express Figure 13 The diagram illustrates the assembly process (approaching moving state and stator state) of the rotor and stator units.

[0035] In the picture:

[0036] 100—Sealed pump; 1—Suction side connector assembly; 2—Discharge side connector assembly; 3A, 3A1, 3A2, 3A3—Circular plate mounting parts; 3Aa—Circular plate fixed part; 3Ab—Opening part; 3Ac, 3A1c, 3A2c, 3A3c—Extension part (anti-rotation mechanism) (key part); 3Ad, 3A2d, 3A3d, 4d, 90f'—Protrusion part (axial anti-detachment mechanism); 3A1e—Through hole (axial anti-detachment mechanism) (recessed part); 4—Cylindrical mounting part; 4a—Cylindrical fixed part; 4b—Opening part; 4c—Inclined part (anti-rotation mechanism) (key part); 6—Thrust washer; 7—Anti-detachment component; 8—Fastening component; 9—Cable insertion hole; 10 —Rotor unit, 20—Rotor, 21—Impeller assembly, 21a—Bearing section, 21b—Base end section, 21c—Expanded diameter section, 21d—Suction blade section, 21e—Outer blade section, 22—Rotor magnet, 30—Main body housing, 31—One side main body housing, 31a—Top wall, 31b—Side peripheral wall, 31c—Opening, 31d—Inner wall of the other end, 31e—Raised section, 31f—Opening, 32—The other side main body housing, 32a—Outer peripheral flange, 32b—Blade storage section, 32c—Rotor magnet storage section, 32d—Shaft fixing component storage section (insertion section), 41—Shaft fixing component, 41a—Shaft hole, 42—Fixed shaft, 43—Blade housing, 43a —One side, 43aa—Opening, 43b—Foot, 43c—Side peripheral wall, 50—Stator unit, 60—Stator, 61—Stator core, 62—Coil frame housing, 62a1—First wall, 62a1h—Main body insertion hole, 62a2—Second wall, 62b—Support, 62ba—Cut-out, 62bb—Coil housing abutment, 63—Coil, 64—Terminal pin, 70—Base plate, 70a—Opening, 70b—Cut-out, 70c—Connector, 70d—Cable, 70h—Pin hole, 80—Coil cover, 80aa—Cover, 80aa—Opening, 80b—Placement, 80c—Connection, 80d—Outer peripheral opening of cover, 80 e—fastening hole, 80f—drooping wall, 90, 90'—coil housing, 90a—bottom of coil housing, 90aa—bottom opening, 90ab—connector insertion hole, 90b—side of coil housing, 90ba—cutout, 90c—coil frame housing receiving part, 90ca—fastening hole, 90d—peripheral wall of bottom opening, 90e—groove (anti-rotation mechanism), 90ea—recess (axial anti-detachment mechanism), 90eb—stepped return part, 90f'—protrusion (axial anti-detachment mechanism), L—axis, Lc—key width, Lg—groove width, M1-1—moving direction, M1-2—moving direction, S1—radial fluid path, S2—impeller storage space. Detailed Implementation

[0037] Reference Figures 1 to 12The embodiments of the present invention will be described in detail. However, the present invention is not limited to the solutions described in this embodiment. Furthermore, Figure 1 , Figure 4 (c), (d) Figures 5 to 8 of (b) Figures 9 to 11 , Figure 12 (c) to Figure 12 The protrusions 3Ad, 3A2d, 3A3d, 4d, and 90f' in (e) are exaggerated for illustrative purposes. In the following description of sealed pumps, a centrifugal impeller is used, but this impeller type is only one example; for example, other impeller types such as cascaded impellers can be used.

[0038] <About Terminology>

[0039] In this specification and the claims, "left," "right," "upper," and "lower" indicate... Figure 1 , Figures 5 to 7 , Figure 9 of (a) Figure 10 of (a) Figure 11 The directions shown. In this specification and claims, "one end" and "the other end" refer to the "upper end" and "lower end" in the drawing. In this specification and claims, "one side" and "the other side" refer to the "upper side" and "lower side" in the drawing. In this specification and claims, "anti-rotation mechanism" means "a component that limits the relative rotational movement of the rotor unit and the stator unit respectively." In this specification and claims, "axial direction anti-disengagement mechanism" means "a component that limits the relative axial movement of the rotor unit and the stator unit respectively." In this specification and claims, "keyway engagement" means "composed of a key extending along the axial direction and a groove extending along the axial direction, and the key and groove engage when viewed from the axial direction." In this specification and the claims, "click-locking" means "comprising a convex portion protruding in the radial direction and a concave portion having a radially recessed shape capable of receiving the convex portion, and when viewed from a direction orthogonal to the axis, the convex portion and the concave portion engage through a radially generated force between the insertion portion and the peripheral wall of the bottom opening." In this specification and the claims, "insertion portion of the rotor unit" and "shaft fixing component receiving portion" mean "in addition to the shaft fixing component receiving portion, it also includes the boundary portion between the shaft fixing component receiving portion and the rotor magnet receiving portion."

[0040] (First Implementation)

[0041] <About the structure of the sealed pump>

[0042] use Figures 1 to 4The sealed pump 100 of this embodiment will be described. Figure 5 As shown, the sealed pump 100 mainly consists of a rotor unit 10 and a stator unit 50, which can be installed and removed along the axis L via a locking mechanism. The various structures of the sealed pump 100 will be described in turn below.

[0043] <About the rotor unit>

[0044] First, such as Figures 1 to 3 As shown, the rotor unit 10 mainly consists of a rotor 20, a main housing 30, a shaft fixing component 41, a fixed shaft 42, and a blade housing 43. The various structures of the rotor unit 10 will be described in detail below.

[0045] Although details will be described later, in the sealing pump 100 of this embodiment, a locking mechanism is adopted, which locks the shaft fixing member housing 32d (insertion portion) of the rotor unit 10 and the peripheral wall 90d of the bottom opening portion 90aa that defines the bottom opening portion into each other. It also has an anti-rotation mechanism and an anti-disengagement mechanism in the axial direction, thereby eliminating both the existing problem 1 (large size in the axial direction of the sealing pump) and the existing problem 2 (insufficient locking state caused by the inability to visually inspect the locking mechanism).

[0046] <About the rotor>

[0047] like Figure 1 As shown, the rotor 20 includes an impeller component 21 and a rotor magnet 22.

[0048] The impeller component 21 includes a cylindrical bearing portion 21a, a base end portion 21b forming the other side of the bearing portion 21a, an enlarged diameter portion 21c forming the center of the bearing portion 21a and extending outward from the base end portion 21b, an intake blade portion 21d forming one side of the bearing portion 21a and extending in one direction, and an outer blade portion 21e that is continuous with the intake blade portion 21d and extends outward in the peripheral direction.

[0049] Furthermore, the impeller component 21 in this embodiment has eight blades, but it is not limited to this and can be selected according to the application of the sealed pump 100 and the required pump capacity.

[0050] The rotor magnet 22 is composed of a ring-shaped permanent magnet and is fixed to the other side of the expanded diameter portion 21c of the impeller component 21 and the outer peripheral surface of the base end portion 21b via an anti-detachment component 7 (e.g., a C-ring). Thus, the impeller component 21 is configured to rotate around the axis L together with the rotor magnet 22.

[0051] <About the main body shell>

[0052] The main casing 30 is made of, for example, a metal material such as stainless steel. Figure 1 As shown, the rotor 20 is housed within a main body housing 31 on one side and a main body housing 32 on the other side. Furthermore, the main body housing 30 of this embodiment is made of a metal material such as stainless steel, but is not limited to this; for example, it may also be made of a resin material.

[0053] The main body shell 31 on one side has a circular shape when viewed from the axis L, and has a top wall 31a and a side peripheral wall 31b formed by a cylindrical shape extending from the outer periphery of the top wall 31a to the other side. An opening 31c is formed in the side peripheral wall 31b of the main body shell 31 on one side (see reference). Figure 2 ), at a position 270° counterclockwise from an opening 31c when viewed from the axis L (refer to Figure 2 Another opening 31f is formed (see reference) Figure 2 The suction-side connector component 1 and the discharge-side connector component 2 are fixed in a sealed state at one opening 31c and another opening 31f, respectively. In addition, when viewed from the axis L, a raised portion 31e is formed on one side of the main body housing 31 along the radial direction from the fixed position of the suction-side connector component 1 to the center position of the axis L.

[0054] The other side of the main body housing 32 has a circular shape when viewed from the axis L direction, and includes: an outer peripheral flange 32a that is provided to hang downward to the other side; a blade receiving portion 32b that extends horizontally from one end of the outer peripheral flange 32a to the inner peripheral side; a cylindrical rotor magnet receiving portion 32c that is provided on the other side of the inner periphery of the blade receiving portion 32b; and a shaft fixing member receiving portion 32d that has a bottom cylindrical shape that is provided on the other side of the inner periphery of the rotor magnet receiving portion 32c.

[0055] Here, the outer peripheral flange 32a of the other main body housing 32 is fixed in a sealed state to the inner wall 31d of the other end of the side peripheral wall 31b of the one main body housing 31. As a result, an internal space is formed in the main body housing 30, which is surrounded by the one main body housing 31 and the other main body housing 32 and is in fluid communication with the suction side connector 1 and the discharge side connector 2.

[0056] <Regarding shaft fixing components and fixed shafts>

[0057] The shaft fixing component 41 is fitted into the shaft fixing component receiving portion 32d, for example, by pressing or inserting. The shaft fixing component 41 has a shaft hole 41a centered on the axis L, and the lower end of the fixing shaft 42 is fixed to the shaft hole 41a by pressing or inserting. The bearing portion 21a of the impeller component 21 is rotatably inserted into the cantilevered fixing shaft 42 via a thrust washer 6 that mitigates dynamic friction.

[0058] <About the blade shell>

[0059] like Figure 2 As shown, when viewed from the axis L, the blade shell 43 has a circular shape. Figure 1 As shown, the blade housing 43 includes: a side surface 43a having an opening 43aa centered on the axis L, and its outer diameter gradually increasing along the circumferential direction from the mounting position of the suction-side connector 1 to the mounting position of the discharge-side connector 2; a foot 43b disposed on the outer periphery of the side surface 43a; and a side peripheral wall 43c connected to the outer periphery of the side surface 43a and the inner periphery of the foot 43b, respectively. Furthermore, the outer diameter of the side peripheral wall 43c of the blade housing 43 is smaller than the inner diameter of the side peripheral wall 31b of one side of the main body housing 31, and the height of the side peripheral wall 43c of the blade housing 43 is smaller than the height of the side peripheral wall 31b of one side of the main body housing 31.

[0060] like Figure 1 As shown, the foot 43b of the blade housing 43 is fixed in a sealed state to the side peripheral wall 31b of one side of the main body housing 31 while abutting against one side of the other main body housing 32 on the suction side connector component 1 side. In addition, although not shown, the side peripheral wall 43c of the blade housing 43 has a shape corresponding to the side peripheral wall 31b of one side of the main body housing 31 on the discharge side connector component 2 side. That is, it has an opening (not shown) at a position corresponding to another opening 31f of one side of the main body housing 31, and the side peripheral wall 43c of the blade housing 43 is fixed in a sealed state together with the discharge side connector component 2 through the opening while abutting against the side peripheral wall 31b of one side of the main body housing 31.

[0061] like Figure 1 as well as Figure 2 As shown, the blade housing 43 forms a fluid path between itself and one side of the main body housing 31. On the other hand, it houses the suction blade portion 21d and the outer blade portion 21e between itself and the blade receiving portion 32b of the other side of the main body housing 32. This fluid path includes: a radial fluid path S1 formed between the protrusion 31e of one side of the main body housing 31 and the blade housing 43; and an impeller receiving space S2 connected to the radial fluid path S1 via the opening 43aa of the blade housing 43. The radial fluid path S1 and the impeller receiving space S2 are in fluid communication with the suction-side connector component 1 and the discharge-side connector component 2, respectively.

[0062] <Regarding the fluid path of a cooling system equipped with a sealed pump>

[0063] Although not shown in the diagram, the fluid path of the cooling device equipped with the sealed pump 100 is a closed loop. This closed loop is connected via a cooling circulation path in the following order: sealed pump 100, heat exchanger with the object being cooled attached, and radiator (e.g., air cooling or water cooling based on a fan), and then circulates back to the sealed pump 100. Therefore, the object being cooled is cooled by the working fluid (e.g., water) circulating between the heat exchanger and the radiator via the sealed pump 100. In this cooling device equipped with the sealed pump 100, cooling of heat-generating elements, equipment, etc., is achieved through fluid circulation, resulting in excellent durability, operability, and quiet operation.

[0064] Next, use Figure 1 as well as Figure 2 The fluid path of the sealed pump 100 during operation will be explained. First, the coil 63 of the stator unit 50 is energized by flowing current through it. The energization of the coil 63 acts on the rotor magnet 22, thereby causing the impeller component 21, which is fixed to the rotor magnet 22, to rotate about the fixed shaft 42 inserted into the shaft fixing component 41.

[0065] like Figure 2 As shown, the rotation of the impeller component 21 creates a negative pressure near the opening 43aa of the blade housing 43 by the suction blade portion 21d. Through this negative pressure, the working fluid is drawn from the suction side connector component 1, which is fluidly connected to the radiator, into the opening 43aa of the blade housing 43 via a radial fluid path S1 defined by the ridge 31e of the blade housing 43 and one side of the main body housing 31. Figure 2 (Arrows A and B in the diagram).

[0066] Then, the fluid drawn into the opening 43aa of the blade housing 43 moves in a spiral shape along the radial direction of the impeller receiving space S2 and the inner circumferential side of the side wall 43c of the blade housing 43 by the centrifugal force of the outer blade portion 21e, and is finally discharged to the heat exchanger through the discharge side connector component 2. Figure 2 (Arrows C and D in the diagram).

[0067] <About stator unit>

[0068] From this point on, use Figure 1 Returning to the description of the stator unit 50 in this embodiment. The stator unit 50 includes a stator 60, a substrate 70, a coil cover 80, and a coil housing 90.

[0069] <About stator>

[0070] like Figure 1 as well as Figure 3As shown, the stator 60 includes: a stator core 61 formed by stacking thin magnetic plates made of magnetic material; a coil frame housing 62 made of insulating material such as resin, covering a portion of the stator core 61; and a plurality of coils 63 wound around the stator core 61 through the coil frame housing 62. Here, as... Figure 3 as well as Figure 5 As shown, the coil holder housing 62 has: a plurality of first wall portions 62a1, which form a main body insertion hole 62a1h into which the main body housing 30 is inserted (see reference). Figure 5 (a)); and a plurality of second wall portions 62a2 that surround the coil 63 from the outer peripheral side. The first wall portion 62a1 and the second wall portion 62a2 extend toward one end and the other end respectively, and a plurality of them are arranged circumferentially. In addition, as Figure 3 As shown, the coil housing 62 has a rectangular shape and includes a support portion 62b at each corner, a cutout portion 62ba provided in the support portion 62b through which a fastening member (not shown) is inserted, and a plurality of terminal pins 64 disposed on the inner periphery of the support portion 62b and electrically connected to the end of the coil 63.

[0071] <About the substrate>

[0072] like Figure 1 and Figure 3 As shown, the substrate 70 has a generally rectangular shape and controls the drive signal to the coil 63. It has an opening 70a centered on the axis L, cutouts 70b located at each corner when viewed from the axis L and through which the fastening member 8 is inserted, and a plurality of pin holes 70h disposed on the inner periphery of the cutouts 70b. Furthermore, as... Figure 3 As shown, a connector 70c with a cable 70d for power supply terminals to the substrate 70 is connected to the other side of the substrate 70.

[0073] <About the coil cover>

[0074] like Figure 1 , Figure 3 as well as Figure 5 As shown in (a), the coil cover 80 covers and protects at least a portion of one side of the coil 63 to prevent physical contact with the coil 63 and the adhesion of foreign objects such as dust, and is made of resin material. In this way, by making the coil cover 80 detachable from one side of the coil 63, a lower cost can be achieved compared to the case where one side of the coil 63 is resin molded.

[0075] Specifically, such as Figure 3As shown, the coil cover 80 includes: a cover portion 80a having a generally rectangular shape and an opening 80aa centered on axis L; a mounting portion 80b disposed on the outer side of the cover portion 80a in the radial direction; a plurality of connecting portions 80c connecting the cover portion 80a and the mounting portion 80b; and fastening holes 80e disposed at each corner for fastening members (not shown) to pass through. The plurality of connecting portions 80c extend from the outer periphery of the cover portion 80a to the other side, and the mounting portion 80b extends radially outward from the other end of the connecting portions 80c. Here, the outer periphery opening 80d of the cover portion is defined by the cover portion 80a, a pair of adjacent connecting portions 80c, and the mounting portion 80b. In the coil cover 80, as... Figure 3 as well as Figure 5 As shown, a first wall portion 62a1 of the coil housing 62 is inserted through the opening 80aa, and a second wall portion 62a2 of the coil housing 62 with a corresponding shape is inserted through the opening 80d on the outer periphery of the cover portion. Furthermore, the coil cover 80 has a drooping wall 80f that hangs down from one side of the mounting portion 80b.

[0076] Furthermore, a coil cover 80 is used in this embodiment, but the coil cover 80 is not a necessary structure. For example, it is also possible to resin mold one side of the stator 60 with a portion of one side of the coil frame housing 62 exposed as the main housing abutment part, or to omit the coil cover 80 itself.

[0077] <About the coil housing>

[0078] like Figure 1 and Figure 3 As shown, the coil housing 90 covers and protects the other side of the coil 63 to prevent physical contact with the coil 63 and the adhesion of foreign objects such as dust, and is made of resin material. Figure 4 As shown in (a), the coil housing 90 has a generally rectangular shape and includes: a coil housing bottom 90a; a coil housing side portion 90b, which is erected from the periphery of the coil housing bottom 90a; a coil frame housing receiving portion 90c, which is provided at each corner of the coil housing bottom 90a and the coil housing side portion 90b; and a fastening hole 90ca, which is formed in the coil frame housing receiving portion 90c and threadedly engaged with the threaded portion of a fastening member (not shown). A bottom opening 90aa centered on the axis L and a connector insertion hole 90ab are formed on the coil housing bottom 90a. Furthermore, a portion of the coil housing side portion 90b of the coil housing 90 is formed that allows it to connect with the lower wall 80f (see reference 80) of the coil cover 80. Figure 3 Insert a cable 70d between them (refer to) Figure 1 The cable has a 90ba cut (refer to) Figure 4 (b)

[0079] <About Card-Setting Institutions>

[0080] like Figure 5 As shown in (a) and (b), the locking mechanism enables the rotor unit 10 and the stator unit 50 to be loaded and unloaded in the axial direction L, and is provided in each of the rotor unit 10 and the stator unit 50. Details will be described later. The locking mechanism includes an anti-rotation mechanism and an axial direction anti-detachment mechanism that respectively restrict the relative rotational direction and axial direction movement of the rotor unit 10 and the stator unit 50.

[0081] <Regarding the locking mechanism of the rotor unit>

[0082] The locking mechanism of the rotor unit 10 is located on the outer side of the shaft fixing member receiving portion 32d (insertion portion) of the rotor unit 10 in the radial direction. Specifically, as the locking mechanism of the rotor unit 10, it is indirectly formed on the outer side of the shaft fixing member receiving portion 32d of the rotor unit 10 in the radial direction via the circular plate-shaped mounting member 3A. In addition, although it is indirectly formed on the outer side of the shaft fixing member receiving portion 32d of the rotor unit 10 in the radial direction via the circular plate-shaped mounting member 3A in this embodiment, it is not limited to this. For example, it may be directly formed on the outer side of the shaft fixing member receiving portion 32d of the rotor unit 10 in the radial direction.

[0083] <About circular plate mounting components>

[0084] use Figure 4 Sections (c) and (d) provide detailed information about the circular plate-shaped mounting component 3A. Additionally, Figure 4 (a) to Figure 4 (d) is a diagram with scales appropriately altered for illustrative purposes. The circular plate-shaped mounting part 3A is a stamped product made of metal, an injection-molded product made of resin, etc. The circular plate-shaped mounting part 3A has: a circular plate-shaped fixing portion 3Aa, which has an opening 3Ab and is circular in shape; and an extension portion 3Ac (key portion), which extends from the inner periphery of the circular plate-shaped fixing portion 3Aa along the axis L and is generally rectangular in shape. A protrusion 3Ad, which protrudes outward in the radial direction and has a hemispherical shape, is provided on the outer radial side of the extension portion 3Ac. In this embodiment, the protrusion 3Ad has a hemispherical shape, but is not limited to this; for example, any protruding shape is acceptable. Furthermore, when viewed from the axis L direction, the distance between the outer radial side of the extension portion 3Ac and the axis L (refer to...) Figure 4 (c) is set to be larger than the distance between the inner circumferential surface of the bottom opening 90d and the axis L, i.e., the radius of the bottom opening 90aa.

[0085] In the circular plate-shaped mounting member 3A, the inner diameter of the opening 3Ab is set to be slightly larger than the outer diameter of the shaft fixing member receiving portion 32d. Furthermore, in the circular plate-shaped mounting member 3A, as... Figure 6As shown in (b), a small protrusion is formed on one end face of the circular plate-shaped fixing part 3Aa. Therefore, when the circular plate-shaped mounting part 3Aa is fixed to the shaft fixing member receiving part 32d of the rotor unit 10, radial positioning can be achieved by inserting the shaft fixing member receiving part 32d into the opening 3Ab of the circular plate-shaped mounting part 3Aa, and the circular plate-shaped fixing part 3Aa and the main body housing 30 can be fixed by resistance welding via the small protrusion formed on one end face of the circular plate-shaped fixing part 3Aa. Furthermore, in this embodiment, resistance welding is used to fix the circular plate-shaped mounting part 3Aa and the main body housing 30, but it is not limited to this; for example, adhesives can also be used.

[0086] Furthermore, although details will be described later, in the locking mechanism of the rotor unit 10, the anti-rotation mechanism is the extension 3Ac of the circular plate-shaped mounting member 3A, and the axial anti-detachment mechanism is the protrusion 3Ad of the circular plate-shaped mounting member 3A.

[0087] <Regarding the locking mechanism of the stator unit>

[0088] The locking mechanism of the stator unit 50 is located on the peripheral wall 90d of the bottom opening 90aa of the coil housing 90.

[0089] <Regarding the perimeter wall of the bottom opening>

[0090] use Figure 4 (a) and (b) provide details about the peripheral wall 90d of the bottom opening. Additionally, Figure 4 (a) to Figure 4 (d) is a diagram whose scale has been appropriately altered for illustrative purposes. For example... Figure 4 As shown in (a), the peripheral wall 90d of the bottom opening has a groove 90e extending along the axis L. Figure 4 As shown in (b), a recess 90ea with a shape that is recessed outward in the radial direction is provided on the other side of the groove 90e, and a stepped return portion 90eb is provided on one side of the groove 90e. The recess 90ea can be any shape that can accommodate the protrusion 3Ad. Here, when viewed from the axis L direction, the groove width Lg of the groove 90e (refer to...) Figure 4 (a) is set to be slightly larger than the key width Lc of the extension 3Ac. Additionally, when viewed from the axis L direction, the distance between the inner radial side of the stepped return section 90eb and the axis L (refer to...) Figure 4 (a) is set to be greater than the distance between the outer peripheral surface of the protrusion 3Ad and the axis L (refer to...). Figure 4 (c) is small. In addition, the groove 90e, which has a recess 90ea and a stepped return portion 90eb, can be formed simultaneously with the coil housing 90 by injection molding.

[0091] In the peripheral wall 90d of the bottom opening in this embodiment, as follows Figure 4 As shown in (a), when viewed from the axis L direction, the groove 90e has a ( Figure 4 (The solid line in (a)), but not limited to this, for example, there can be multiple places (e.g., four places). Figure 4 (The solid and dashed lines in (a)). Thus, when the rotor unit 10 and the stator unit 50 are engaged in the direction of axis L via the locking mechanism, the degree of freedom of the cable 70d in the lead-out direction can be improved.

[0092] In addition, although details will be described later, in the locking mechanism of the stator unit 50, the anti-rotation mechanism is the groove 90e of the peripheral wall 90d of the bottom opening, and the anti-detachment mechanism in the axial direction is the recess 90ea of ​​the peripheral wall 90d of the bottom opening.

[0093] <Regarding the assembly process of the stator unit>

[0094] use Figures 3 to 5 The assembly process of the stator unit 50 will be explained. First, regarding the assembly process of the stator 60 and the substrate 70, the multiple terminal pins 64 of the stator 60 (refer to...) Figure 3 The terminal pin 64 is fixed to the substrate 70 by soldering while the other end of the first wall portion 62a1 and the other end of the second wall portion 62a2 are in contact with the substrate 70.

[0095] Next, regarding the process of assembling the mutually fixed stator 60 and substrate 70 into the coil housing 90, as follows... Figure 3 As shown, the connector 70c, located on the other side of the substrate 70, is inserted into the connector insertion hole 90ab, and the coil housing abutment portion 62bb of the support portions 62b located at the four corners of the coil housing 62 is placed on the coil housing receiving portion 90c of the coil housing 90 (see reference). Figure 4 (a)).

[0096] Then, regarding the assembly process of the stator 60 and the coil cover 80 placed on the coil housing 90, the plurality of first wall portions 62a1 (refer to...) are... Figure 5 (a) is inserted into the opening 80aa of the coil cover 80 respectively (refer to) Figure 3 ), and the second wall portion 62a2 of the coil frame housing 62 (see reference) Figure 5 (a) are respectively inserted into the outer peripheral opening 80d of the cover portion of the coil cover 80 having the corresponding shape (refer to) Figure 3At this time, the other side of the mounting portion 80b of the coil cover 80 rests on one side of the support portion 62b of the coil frame housing 62, and the connecting portion 80c of the coil cover 80 is respectively inserted into the circumferential gap of the second wall portion 62a2 of the coil frame housing 62, which is provided at the corresponding position. Additionally, at the same time, the lower wall 80f of the coil frame housing 62 (see...) Figure 3 The cable cutout 90ba that engages with the coil housing 90 (see reference) Figure 4 One side of (b) is thus formed Figure 1 The cable insertion hole 9 is shown, and the cable 70d is led out to the outside through the cable insertion hole 9.

[0097] Finally, in stator unit 50, the fastening component (not shown) is connected to... Figure 4 The fastening holes 90ca of the coil housing 90 shown in (a) are threaded together, thereby forming the stator unit 50 as a whole. At this time, the fastening components are inserted in sequence. Figure 3 The coil cover 80 has a fastening hole 80e, the stator 60 has a cutout 62ba, and the substrate 70 has a cutout 70b.

[0098] <Assembly process of rotor unit and stator unit>

[0099] use Figure 5 and Figure 6 The assembly process of rotor unit 10 and stator unit 50 is described. First, with the rotor unit 10 and stator unit 50 aligned with each other along their axes L, the stator unit 50 is moved closer to one side of axis L relative to the rotor unit 10. Figure 5 (m1-1 in (a)).

[0100] As described above, in the locking mechanism of the rotor unit 10, the anti-rotation mechanism is the extension 3Ac (key portion) of the circular plate-shaped mounting member 3A, and the axial direction anti-disengagement mechanism is the protrusion 3Ad of the circular plate-shaped mounting member 3A. On the other hand, in the locking mechanism of the stator unit 50, the anti-rotation mechanism is the groove 90e of the peripheral wall 90d of the bottom opening, and the axial direction anti-disengagement mechanism is the recess 90ea of ​​the peripheral wall 90d of the bottom opening.

[0101] Furthermore, in the engaging mechanism of the first embodiment, the anti-rotation mechanism (extension 3Ac) provided on the circular plate-shaped mounting member 3A and the axial anti-detachment mechanism (protrusion 3Ad) provided on the circular plate-shaped mounting member 3A are arranged adjacent to each other, and the anti-rotation mechanism (groove 90e) provided on the peripheral wall 90d of the bottom opening and the axial anti-detachment mechanism (recess 90ea) provided on the peripheral wall 90d of the bottom opening are arranged adjacent to each other. However, this is not a limitation. For example, the anti-rotation mechanism provided on the circular plate-shaped mounting member 3A and the axial anti-detachment mechanism provided on the circular plate-shaped mounting member 3A may be separately configured, and the anti-rotation mechanism provided on the peripheral wall 90d of the bottom opening and the axial anti-detachment mechanism provided on the peripheral wall 90d of the bottom opening may also be separately configured.

[0102] Here, when the rotor unit 10 and stator unit 50 are engaged with each other via the engagement mechanism, the engagement must be performed in the order of the anti-rotation mechanism and the axial anti-disengagement mechanism. Therefore, first, when viewed from the axial direction L, the circumferential alignment of the extension 3Ac (key portion) of the circular plate-shaped mounting member 3A in the anti-rotation mechanism and the groove 90e of the peripheral wall 90d of the bottom opening portion is performed.

[0103] Then, the rotor magnet housing portion 32c of the rotor unit 10 is inserted through the main body insertion hole 62a1h of the stator 60, and the shaft fixing component housing portion 32d of the rotor unit 10 is inserted through the opening 70a of the substrate 70 and the bottom opening 90aa of the coil housing 90. Figure 5 (m1-2 in (b)).

[0104] Thus, the extension 3Ac of the circular plate-shaped mounting member 3A in the anti-rotation mechanism is received in the groove 90e of the peripheral wall 90d of the bottom opening, which is called keyway engagement, and can restrict the movement of the rotor unit 10 and the stator unit 50 in the relative rotational direction.

[0105] In this embodiment, the key width Lc of the extension 3Ac and the groove width Lg of the groove 90e in the keyway engagement are approximately constant in the direction of the axis L, but are not limited thereto. For example, as long as the extension 3Ac and the groove 90e have a shape that allows them to be inserted into each other in the direction of the axis L (a shape with a chamfer at the front end, a conical shape, etc.), it is acceptable.

[0106] Next, in order to engage the rotor unit 10 and the stator unit 50 with the axial anti-disengagement mechanism, the stator unit 50 continues to move relative to the rotor unit 10 to the other side of the axis L. Figure 5 (b) shows the direction of movement M1-2). At this time, as... Figure 6As shown in (a), the protrusion 3Ad of the circular plate-shaped mounting member 3A moves relative to the groove 90e of the peripheral wall 90d of the bottom opening along the axis L, and abuts against the stepped return portion 90eb through the protrusion 3Ad, while the extension 3Ac elastically deforms inward in the radial direction. Then, as... Figure 6 As shown in (b), the protrusion 3Ad passes over the stepped return portion 90eb, and thereby, through the outward radial force (restoring force) generated by the extension 3Ac, the protrusion 3Ad and the recess 90ea engage, forming a so-called snap-fit ​​engagement, which restricts the movement of the rotor unit 10 and the stator unit 50 in the relative axis L direction. As a result, the rotor magnet 22 is arranged in an assembly state with the stator 60 arranged radially inside. At this time, as... Figure 1 As shown, the other end (lower end) of the rotor unit 10 is configured to be the same as the other end face of the coil housing 90, or to be configured to be on one side of the other end face of the coil housing 90.

[0107] Furthermore, when the circular plate-shaped mounting member 3A and the coil housing 90 are both made of resin material, or when the circular plate-shaped mounting member 3A is made of metal material and the coil housing 90 is made of resin material, the wear powder generated by the engaging mechanism is non-conductive resin powder, so it will not cause any obstruction to the power supply of the nearby substrate 70 or electrical equipment disposed around the sealing pump 100.

[0108] like Figure 6 As shown in (b), in this assembled state, the radial contact portion between the rotor unit 10 and the stator unit 50 causes the rotor magnet housing portion 32c to abut against the stator 60. However, it is not limited to this; for example, it can be used wherever... Figure 6 As shown in (b), the wall thickness of the peripheral wall 90d of the bottom opening on the right side, which is located symmetrical to the groove 90e relative to the axis L, is increased inward in the radial direction, and the shaft fixing component housing 32d abuts against the inner peripheral surface of the peripheral wall 90d of the bottom opening on the right side, etc., can be a structure in which the shaft fixing component housing 32d abuts against the inner peripheral surface of the peripheral wall 90d of the bottom opening on the right side, etc., in any part of the radial direction.

[0109] In addition, such as Figure 1 As shown, in the assembled state, the contact portion of the rotor unit 10 and the stator unit 50 along the axis L causes the blade receiving portion 32b of the rotor unit 10 to abut against one end of the first wall portion 62a1 and / or one end of the second wall portion 62a2. However, it is not limited to this; for example, it can be used wherever... Figure 6 The structure shown in (b) can be such that the peripheral wall 90d of the bottom opening extends to one end in the direction of the axis L, and the peripheral wall 90d of the bottom opening abuts against the circular plate-shaped fixing part 3Aa of the circular plate-shaped mounting part 3A, or the structure abuts against each other in the direction of the axis L at any part.

[0110] Thus, in the sealing pump 100 of the first embodiment, a locking mechanism is employed that engages the shaft fixing member housing portion 32d (insertion portion) of the rotor unit 10 with the peripheral wall 90d of the bottom opening portion 90aa, and includes an anti-rotation mechanism and an anti-disengagement mechanism in the axial direction. This allows for a lower height in the axial direction L, and the locking state of the locking mechanism can be directly observed through the bottom opening portion 90aa. Therefore, both existing problem 1 (the sealing pump's increased size in the axial direction) and existing problem 2 (insufficient locking state caused by the inability to visually observe the locking mechanism) can be eliminated simultaneously.

[0111] From this point onward, targeting Figure 13 as well as Figure 14 The existing sealing pump 1300 shown has concerns 1 (loosening of the locking mechanism caused by impact from external forces), 2 (reduced loading and unloading due to the two-operation locking mechanism), and 3 (high manufacturing cost and difficulty in size management of the locking mechanism). The sealing pump 100 of the first embodiment eliminates each concern.

[0112] <Regarding concern 1 (loosening of the locking mechanism due to external impact)>

[0113] Additionally, in the existing sealed pump 1300, such as Figure 14 As shown, when assembling the stator unit 1350 onto the rotor unit 1310, the stator unit 1350 is moved relative to the rotor unit 1310 along the axis L. Figure 14 The direction of movement is M1401), and it rotates around axis L. Figure 14 The rotation direction M1402 causes the rotor unit-side locking mechanism 1305a and the stator unit-side locking mechanism 1305b to engage with each other. Therefore, in the existing sealed pump 1300, when it is subjected to an impact from an external force in the rotation direction during assembly, relative rotational motion occurs between the stator unit 1350 and the rotor unit 1310, and there is a concern that the locking state of the locking mechanism 1305 may become loose (hereinafter referred to as "Concern 1 (Loosening of the locking mechanism caused by an impact from an external force)").

[0114] In contrast, in the sealing pump 100 of this embodiment, a keyway locking mechanism in the L-axis direction is used to stop the rotation. This provides a mechanically robust structure that allows for loading and unloading and is mechanically resistant to forces in the rotational direction when locked, thus eliminating concern 1 (loosening of the locking mechanism due to impacts from external forces).

[0115] <Regarding concern 2 (reduced loading and unloading performance caused by the engagement mechanism of the two actions)>

[0116] Additionally, in the existing sealed pump 1300, such as Figure 14 As shown, in order to assemble the rotor unit 1310 and the stator unit 1350 via the engaging mechanism 1305, two actions are required (movement in the axial direction and rotational direction). Figure 14 There is a concern about reduced loading and unloading performance in the moving direction M1401 and rotating direction M1402 (hereinafter referred to as "Concern 2 (Reduced loading and unloading performance caused by the engagement mechanism of the two actions)").

[0117] In contrast, in the sealed pump 100 of this embodiment, a keyway engagement and a snap-fit ​​engagement in the axial L direction are used to stop the rotation mechanism and an anti-disengagement mechanism in the axial direction, respectively. Therefore, the assembly of the rotor unit 10 and the stator unit 50 can be achieved by only one action in the axial L direction. Figure 5 The movement is carried out in the directions M1-1 and M1-2, thus eliminating concern 2 (the reduced loading and unloading performance caused by the engagement mechanism of the two actions).

[0118] Furthermore, in the assembled state of the rotor unit 10 and stator unit 50, the coil housing 90 is typically placed on the mounting surface (not shown). Therefore, in order to remove the rotor unit 10 and stator unit 50, it is necessary to apply appropriate force in the appropriate direction to the extension 3Ac, which is difficult to access from the outside. Therefore, in the mounted state of the sealed pump 100, it is possible to prevent the snap-fit ​​mechanism, which serves as an axial anti-disengagement mechanism, from being unintendedly removed.

[0119] <Regarding concern 3 (high manufacturing costs and difficulties in dimensional management of the locking mechanism)>

[0120] Furthermore, in the existing sealed pump 1300, such as Figure 14 As shown, the rotor unit side locking mechanism 1305a and the stator unit side locking mechanism 1305b, which are locking mechanisms 1305, have relatively large radial dimensions and complex shapes. Therefore, there are concerns about high manufacturing costs and difficulties in dimensional management (hereinafter referred to as "Concern 3 (High manufacturing costs and difficulties in dimensional management of locking mechanisms)").

[0121] In contrast, in the sealing pump 100 of this embodiment, the axial anti-detachment mechanism and the anti-rotation mechanism are concentrated in the extension 3Ac of the circular plate-shaped mounting member 3A (the extension 3Ac itself or is disposed close to the extension 3Ac), which can reduce manufacturing costs and make size management easier, thus eliminating concern 3 (high manufacturing cost and difficulty in size management of the locking mechanism).

[0122] As described above, in the sealing pump 100 of the first embodiment, a locking mechanism is employed that engages the shaft fixing member receiving portion 32d (insertion portion) of the rotor unit 10 with the peripheral wall 90d of the bottom opening portion 90aa, and includes an anti-rotation mechanism and an axial anti-disengagement mechanism. This simultaneously eliminates both existing problem 1 (the sealing pump's axial enlargement) and existing problem 2 (insufficient engagement due to the inability to visually inspect the locking mechanism). Furthermore, in the sealing pump 100 of the first embodiment, a keyway locking mechanism in the axial L direction is employed as the anti-rotation mechanism, thereby eliminating concern 1 (loosening of the locking mechanism due to external impact). Further, in the sealing pump 100 of the first embodiment, both a keyway locking mechanism in the axial L direction and a snap-locking mechanism in the axial direction are employed as the anti-rotation mechanism and the axial anti-disengagement mechanism, thus eliminating concern 2 (reduced ease of installation and removal caused by two locking mechanisms). Furthermore, in the sealing pump 100 of the first embodiment, the axial anti-disengagement mechanism and the anti-rotation mechanism are concentrated in the extension 3Ac of the circular plate-shaped mounting member 3A, thereby eliminating concern 3 (high manufacturing cost and difficulty in size management of the locking mechanism).

[0123] (Modifications 1-3 of the engagement mechanism of the first embodiment)

[0124] Next, use Figures 7 to 10 This section describes the deformation examples 1 to 3 of the engagement mechanism.

[0125] (Example 1 of the modified engagement mechanism)

[0126] use Figure 7 as well as Figure 8 The snap-fit ​​mechanism of the modified snap-fit ​​mechanism 1 of the first embodiment, serving as an axial anti-detachment mechanism, will be described. This modified snap-fit ​​mechanism 1, serving as an axial anti-detachment mechanism, consists of a protrusion 90f' in the groove 90e of the bottom opening peripheral wall 90d and a through hole 3A1e (recess) in the extension 3A1c of the circular plate-shaped mounting member 3A1. It differs from the first embodiment in that the protrusion and concave parts are reversed, but the other basic structures are the same as the first embodiment. Here, the same symbols are used to denote the same structures, and repeated descriptions are omitted. Furthermore, Figure 8 (a) to Figure 8 (d) is a diagram whose scale has been appropriately changed for illustrative purposes.

[0127] <About circular plate mounting components>

[0128] use Figure 7 as well as Figure 8(c) and (d) describe the details of the circular plate-shaped mounting part 3A1. The circular plate-shaped mounting part 3A1 is a stamped product made of metal, an injection-molded product made of resin, etc. The circular plate-shaped mounting part 3A1 has: a circular plate-shaped fixing part 3Aa, which has an opening 3Ab and is circular in shape; and an extension part 3A1c (key part), which extends from the inner periphery of the circular plate-shaped fixing part 3Aa along the axis L and is generally rectangular in shape. A through hole 3A1e (recess) is provided in the extension part 3A1c, penetrating in the radial direction. While this embodiment includes a through hole 3A1e, it is not limited to this; for example, any shape that is recessed in the radial direction and can accommodate the protrusion 90f' is acceptable.

[0129] In addition, in the locking mechanism of the rotor unit 10, the anti-rotation mechanism is the extension 3A1c of the circular plate-shaped mounting member 3A1, and the axial anti-detachment mechanism is the through hole 3A1e of the circular plate-shaped mounting member 3A1.

[0130] <Regarding the perimeter wall of the bottom opening>

[0131] use Figure 7 as well as Figure 8 (a) and (b) provide details about the peripheral wall 90d of the bottom opening. For example... Figure 8 As shown in (a), the peripheral wall 90d of the bottom opening has a groove 90e extending along the axis L. Figure 8 As shown in (b), a protrusion 90f' protruding inward in the radial direction and having a hemispherical shape is provided in the groove 90e. In this embodiment, the protrusion 90f' has a hemispherical shape, but it is not limited to this; for example, it can have any convex shape.

[0132] In addition, in the locking mechanism of the stator unit 50, the anti-rotation mechanism is the groove 90e of the peripheral wall 90d of the bottom opening, and the anti-detachment mechanism in the axial direction is the protrusion 90f' of the peripheral wall 90d of the bottom opening.

[0133] <Assembly process of rotor and stator units>

[0134] use Figure 7 The assembly process of the rotor unit 10 and the stator unit 50 will be described. Here, in the locking mechanism of the rotor unit 10, the anti-rotation mechanism is the extension 3A1c (key portion) of the circular plate-shaped mounting member 3A1, and the axial anti-detachment mechanism is the through hole 3A1e of the circular plate-shaped mounting member 3A1. On the other hand, in the locking mechanism of the stator unit 50 (coil housing 90'), the anti-rotation mechanism is the groove 90e of the peripheral wall 90d of the bottom opening, and the axial anti-detachment mechanism is the protrusion 90f' of the peripheral wall 90d of the bottom opening.

[0135] Therefore, when the rotor unit 10 and the stator unit 50 are engaged with each other via the engagement mechanism, the engagement must be performed in the order of the anti-rotation mechanism and the axial anti-disengagement mechanism. Therefore, firstly, as the anti-rotation mechanism, i.e., the keyway engagement, the extension 3Ac of the circular plate-shaped mounting member 3A is housed in the groove 90e of the peripheral wall 90d of the bottom opening.

[0136] Next, as an anti-detachment mechanism in the axial direction, the buckle engages by the outward force generated by the extension 3A1c in the radial direction, causing the protrusion 90f' to engage with the through hole 3A1e (recess).

[0137] Furthermore, in the modified example 1 of the locking mechanism of the first embodiment, the protrusion and concavity of the latch engagement, which serves as the axial anti-disengagement mechanism, are opposite to those of the first embodiment. On the other hand, the key portion and groove portion of the keyway engagement, which serves as the anti-rotation mechanism, are the same as those of the first embodiment. However, it is not limited to this. For example, it is also possible that the protrusion and concavity of the latch engagement, which serves as the axial anti-disengagement mechanism, are opposite to those of the first embodiment, while the key portion and groove portion of the keyway engagement, which serves as the anti-rotation mechanism, are opposite to those of the first embodiment. Alternatively, it is also possible that the protrusion and concavity of the latch engagement, which serves as the axial anti-disengagement mechanism, are the same as those of the first embodiment, while the key portion and groove portion of the keyway engagement, which serves as the anti-rotation mechanism, are opposite to those of the first embodiment.

[0138] As described above, in the sealing pump 100 of the first embodiment's locking mechanism modification 1, a locking mechanism is employed similarly to the first embodiment. This locking mechanism engages the shaft fixing member housing portion 32d (insertion portion) of the rotor unit 10 with the peripheral wall 90d of the bottom opening portion 90aa, and includes an anti-rotation mechanism and an axial anti-disengagement mechanism. This simultaneously eliminates both existing problem 1 (the sealing pump's axial enlargement) and existing problem 2 (insufficient locking due to the inability to visually inspect the locking mechanism). Furthermore, in the sealing pump 100 of the first embodiment's locking mechanism modification 1, a keyway locking mechanism in the axial L direction is employed as an anti-rotation mechanism, similarly to the first embodiment. This eliminates concern 1 (loosening of the locking mechanism caused by external impact). Furthermore, in the sealing pump 100 of the modified engagement mechanism 1 of the first embodiment, similarly to the first embodiment, a keyway engagement and a snap-fit ​​engagement in the axial direction L are used as an anti-rotation mechanism and an anti-disengagement mechanism in the axial direction, thus eliminating concern 2 (reduced ease of installation and removal caused by the two engagement mechanisms). Moreover, in the sealing pump 100 of the modified engagement mechanism 1 of the first embodiment, similarly to the first embodiment, the anti-disengagement mechanism and the anti-rotation mechanism in the axial direction are concentrated in the extension 3A1c of the circular plate-shaped mounting member 3A1, thereby eliminating concern 3 (high manufacturing cost and difficulty in dimensional management of the engagement mechanism).

[0139] (Modifications of the locking mechanism, examples 2 and 3)

[0140] use Figure 9 as well as Figure 10 The protrusions 3A2d and 3A2d, which are continuously provided at the front ends of the extensions 3A2c and 3A3c in the circular plate-shaped mounting members 3A2 and 3A3 of the first embodiment, will be described. In the circular plate-shaped mounting members 3A2 and 3A3 of the first embodiment, the shapes of the protrusions 3A2d and 3A2d are different from those in the first embodiment, but the other basic structures are the same as those in the first embodiment. Here, the same symbols are used to mark the same structures, and repeated descriptions are omitted.

[0141] <Regarding concern 4 (insufficient retaining force of the latch due to the force exerted by the extension)>

[0142] In the circular plate-shaped mounting member 3A of the first embodiment, such as Figure 4 As shown in (d), the extension 3Ac functions as a cantilever beam for the leaf spring. Therefore, as Figure 6 As shown in (b), the retaining force of the snap-fit ​​engagement after the rotor unit 10 and stator unit 50 are assembled depends heavily on the force of the extension 3Ac. Therefore, there is a concern that the retaining force required for the snap-fit ​​engagement cannot be adequately met by the force of the extension 3Ac alone (hereinafter referred to as "Concern 4 (Insufficient retaining force of snap-fit ​​engagement caused by the force of the extension)").

[0143] In contrast, in the modified examples 2 and 3 of the first embodiment of the engaging mechanism, the shape of the protrusions 3A2d and 3A3d of the circular plate mounting members 3A2 and 3A3 is improved, and a winding structure or a bending structure is adopted, thereby eliminating concern 4 (insufficient retaining force of the snap-fit ​​caused by the force of the extension).

[0144] (Example 2 of the locking mechanism)

[0145] use Figure 9The details of the circular plate-shaped mounting member 3A2 in the modified example 2 of the first embodiment of the engaging mechanism will be described. The circular plate-shaped mounting member 3A2 is a stamped product made of metal material, an injection-molded product made of resin material, etc. The circular plate-shaped mounting member 3A2 has: a circular plate-shaped fixing part 3Aa, which has an opening 3Ab and is circular plate-shaped; an extension part 3A2c (key part), which extends from the inner periphery of the circular plate-shaped fixing part 3Aa along the axis L direction and is generally rectangular in shape; and a protrusion part 3A2d (axial direction anti-detachment mechanism), which is continuously provided with the front end of the extension part 3A2c and is composed of a winding structure that bends and winds outward in the radial direction. In this way, the protrusion part 3A2d is composed of a winding structure, so when it is housed in the recess 90ea, the force of the cantilever leaf spring of the extension part 3A2c and the force of the winding structure of the protrusion part 3A2d act in an overlapping manner. Therefore, in the circular plate mounting part 3A2, the protrusion 3A2d adopts a winding structure, which allows the force to be set freely, thus eliminating concern 4 (insufficient retaining force of the snap-fit ​​due to the force of the extension).

[0146] (Example 3 of the modified engagement mechanism)

[0147] use Figure 10 The details of the circular plate-shaped mounting member 3A3 of the modified example 3 of the locking mechanism of the first embodiment will be described. The circular plate-shaped mounting member 3A3 is a stamped product made of metal material, an injection-molded product made of resin material, etc. The circular plate-shaped mounting member 3A3 has: a circular plate-shaped fixing part 3Aa, which has an opening 3Ab and is circular plate-shaped; an extension part 3A3c (key part), which extends from the inner periphery of the circular plate-shaped fixing part 3Aa along the axis L direction and is generally rectangular in shape; and a protrusion part 3A3d (axial direction anti-disengagement mechanism), which is continuously provided with the front end of the extension part 3A3c and is composed of a buckling structure that buckles outward in the radial direction and inward in the radial direction. In this way, the protrusion part 3A3d is composed of a buckling structure, so when it is received in the recess 90ea, the force of the cantilever leaf spring of the extension part 3A3c and the force of the buckling structure of the protrusion part 3A3d act in an overlapping manner. Therefore, in the circular plate mounting part 3A3, the protrusion 3A3d adopts a buckling structure, which can freely set the force, thus eliminating concern 4 (insufficient retaining force of the snap-fit ​​caused by the force of the extension).

[0148] As described above, in the sealing pump 100 of the locking mechanism variations 2 and 3 of the first embodiment, a locking mechanism is employed similarly to the first embodiment. This locking mechanism engages the shaft fixing member housing portion 32d (insertion portion) of the rotor unit 10 with the peripheral wall 90d of the bottom opening portion 90aa, and includes an anti-rotation mechanism and an axial anti-disengagement mechanism. This simultaneously eliminates both existing problem 1 (larger size of the sealing pump in the axial direction) and existing problem 2 (insufficient engagement caused by the inability to visually inspect the locking mechanism). Furthermore, in the sealing pump 100 of the locking mechanism variations 2 and 3 of the first embodiment, a keyway locking mechanism in the axial direction L is employed as an anti-rotation mechanism, thereby eliminating concern 1 (loosening of the locking mechanism caused by external impact). Furthermore, in the sealing pumps 100 of the locking mechanism variations 2 and 3 of the first embodiment, similarly to the first embodiment, keyway locking in the axial direction L and snap-fit ​​locking are respectively used as anti-rotation mechanisms and anti-detachment mechanisms in the axial direction, thus eliminating concern 2 (reduced ease of installation and removal caused by the two locking mechanisms). Moreover, in the sealing pumps 100 of the locking mechanism variations 2 and 3 of the first embodiment, similarly to the first embodiment, the anti-detachment mechanism and anti-rotation mechanism in the axial direction are concentrated in the extensions 3A2c and 3A3c of the circular plate-shaped mounting members 3A2 and 3A3, thereby eliminating concern 3 (high manufacturing cost and difficulty in dimensional management of the locking mechanism). Furthermore, in the sealing pumps 100 of the locking mechanism variations 2 and 3 of the first embodiment, the protrusions 3A2d and 3A3d, which are continuously provided with the front ends of the extensions 3A2c and 3A3c, adopt a winding or bending structure, thereby allowing for free setting of the force, thus eliminating concern 4 (insufficient retaining force of the snap-fit ​​locking caused by the force of the extension).

[0149] (Second Implementation)

[0150] use Figure 11 as well as Figure 12 The cylindrical mounting member 4 of the second embodiment will be described. This second embodiment differs from the first embodiment in that it uses a cylindrical mounting member 4 instead of a circular plate-shaped mounting member 3A; otherwise, the basic structure is the same as the first embodiment. Here, identical symbols are used to denote identical structures, and repeated descriptions are omitted. Furthermore, Figure 12 (a) to Figure 12 (d) is a diagram whose scale has been appropriately changed for illustrative purposes.

[0151] <Regarding concern 5 (the complex dimensional management of protruding structures)>

[0152] As described above, in variations 2 and 3 of the engagement mechanism of the first embodiment, such as Figure 9(b) and Figure 10 As shown in (b), the protrusions 3A2d and 3A3d of the circular plate-shaped mounting parts 3A2 and 3A3 employ a coiled or bent structure, thereby eliminating concern 4 (insufficient retaining force of the snap-fit ​​due to the force of the extension). However, the coiled or bent structure of the protrusions 3A2d and 3A3d has a relatively complex structure, thus raising concerns about the complexity of dimensional management during the manufacturing process (hereinafter referred to as "Concern 5 (complex dimensional management of the protrusion structure)"). Furthermore, as... Figure 9 (a) and Figure 10 As shown in (a), the length of the extensions 3A2c and 3A3c of the circular plate mounting parts 3A2 and 3A3 in the L direction is determined by the configuration relationship between the rotor unit 10 and the stator unit 50, and therefore cannot be changed.

[0153] In contrast, in the second embodiment, instead of modifying the shapes of the extensions 3A2c, 3A3c and the protrusions 3A2d, 3A2d of the circular plate mounting members 3A2, 3A3 as in the first embodiment's locking mechanism variations 2 and 3, a cylindrical mounting member 4 is used instead of the circular plate mounting members 3A2, 3A3 of the first embodiment's locking mechanism variations 2 and 3. This simultaneously eliminates concern 4 (insufficient retaining force of the latching caused by the force of the extension) and concern 5 (complex size management of the protrusion structure).

[0154] <About cylindrical mounting components>

[0155] use Figure 12 (c), (d), and (e) will describe the details of the cylindrical mounting part 4. The cylindrical mounting part 4 is a stamped product made of metal material, an injection-molded product made of resin material, etc. The cylindrical mounting part 4 has a cylindrical fixing part 4a and an inclined part 4c (key part). The cylindrical fixing part 4a has an opening 4b and is cylindrical in shape. The inclined part 4c causes a portion of the peripheral edge of the other end of the cylindrical fixing part 4a to protrude outward in the radial direction when viewed from the axis L direction, and is inclined to the axis L when viewed from a direction orthogonal to the axis L. A protrusion 4d protruding outward in the radial direction and having a hemispherical shape is provided on the outer radial side of the inclined part 4c. In this embodiment, the protrusion 4d has a hemispherical shape, but is not limited to this, for example, it can have any convex shape. In addition, when viewed from the axis L direction, the distance between the outer radial side of the inclined part 4c and the axis L (refer to Figure 12 (c) is set to be larger than the distance between the inner circumferential surface of the bottom opening 90d and the axis L, i.e., the radius of the bottom opening 90aa.

[0156] In the cylindrical mounting member 4, the inner diameter of the opening 4b is set to be the same as or slightly larger than the outer diameter of the shaft fixing member receiving portion 32d. Furthermore, when the cylindrical mounting member 4 is fixed to the outer circumferential surface of the shaft fixing member receiving portion 32d of the rotor unit 10, the shaft fixing member receiving portion 32d is fitted into the opening 4b of the cylindrical mounting member 4, thereby enabling radial positioning. The cylindrical fixing portion 4a and the main housing 30 are then fixed by welding. In this embodiment, welding is used to fix the cylindrical mounting member 4 to the main housing 30, but this is not a limitation; for example, adhesives may also be used.

[0157] Thus, the cylindrical mounting member 4 of the second embodiment is positioned further from the other end of the main body housing 30 than the plate-shaped mounting members 3A2 and 3A3 of the locking mechanism variations 2 and 3 of the first embodiment. Therefore, it is certain that the length of the inclined portion 4c in the axial L direction (refer to) can be increased. Figure 11 The length in the L direction of the extensions 3A2c and 3A3c of the locking mechanism in variations 2 and 3 of the first embodiment (refer to...) Figure 9 (a) and Figure 10 (a) is smaller. Detailed explanation is omitted here, but in the cantilever beam model of the leaf spring, the force generated by the leaf spring is inversely proportional to the cube of the length of the leaf spring in the longitudinal direction. Therefore, in the second embodiment, the force of the inclined portion 4c can be made greater than the forces of the extension portions 3A2c and 3A3c, and the shape of the protrusion 4d can also be simplified. Thus, concern 4 (insufficient retaining force of the snap-fit ​​caused by the force of the extension portion) and concern 5 (complex dimensional management of the protrusion structure) can be eliminated simultaneously.

[0158] In addition, in the locking mechanism of the rotor unit 10, the anti-rotation mechanism is the inclined part 4c of the cylindrical mounting member 4, and the axial anti-detachment mechanism is the protrusion 4d of the cylindrical mounting member 4.

[0159] <Regarding the perimeter wall of the bottom opening>

[0160] Figure 12 The bottom opening peripheral wall 90d shown in (a) and (b) is... Figure 4 The bottom opening peripheral wall 90d shown in the first embodiment is the same, so a detailed description is omitted here. Furthermore, the recess 90ea can be any shape capable of accommodating the recess of the protrusion 4d. Additionally, when viewed from the axis L direction, the groove width Lg of the groove 90e (refer to...) Figure 12 (a) is set to be slightly larger than the key width Lc of the inclined section 4c. Additionally, when viewed from the axis L direction, the distance between the inner radial side of the stepped return section 90eb and the axis L (refer to...) Figure 12 (a) is set to be greater than the distance between the outer peripheral surface of the convex part 4d and the axis L (refer to...). Figure 12 (c) small.

[0161] In addition, in the locking mechanism of the stator unit 50, the anti-rotation mechanism is the groove 90e of the peripheral wall 90d of the bottom opening, and the anti-detachment mechanism in the axial direction is the recess 90ea of ​​the peripheral wall 90d of the bottom opening.

[0162] <Assembly process of rotor and stator units>

[0163] use Figure 11 The assembly process of the rotor unit 10 and the stator unit 50 will be described. Here, in the locking mechanism of the rotor unit 10, the anti-rotation mechanism is the inclined portion 4c (key portion) of the cylindrical mounting member 4, and the axial anti-detachment mechanism is the protrusion 4d of the cylindrical mounting member 4. On the other hand, in the locking mechanism of the stator unit 50, the anti-rotation mechanism is the groove 90e of the peripheral wall 90d of the bottom opening, and the axial anti-detachment mechanism is the recess 90ea of ​​the peripheral wall 90d of the bottom opening.

[0164] Therefore, when the rotor unit 10 and the stator unit 50 are engaged with each other via the engaging mechanism, the engagement must be performed in the order of the anti-rotation mechanism and the axial anti-disengagement mechanism. Therefore, firstly, as the anti-rotation mechanism, i.e., the keyway engagement, the inclined portion 4c of the cylindrical mounting member 4 is housed in the groove 90e of the peripheral wall 90d of the bottom opening.

[0165] Next, as an anti-detachment mechanism in the axial direction, the buckle engages by using the force (restoring force) generated by the inclined part 4c in the radial direction to make the protrusion 4d and the concave part 90ea engage.

[0166] Furthermore, in the second embodiment, the interlocking convex and concave shapes of the latching engagement as the axial anti-detachment mechanism are the same as in the first embodiment. On the other hand, the key portion and groove portion of the keyway engagement as the anti-rotation mechanism are the same as in the first embodiment. However, this is not a limitation. For example, the interlocking convex and concave shapes of the latching engagement as the axial anti-detachment mechanism may be opposite to those in the first embodiment, while the key portion and groove portion of the keyway engagement as the anti-rotation mechanism are the same as in the first embodiment. Alternatively, the interlocking convex and concave shapes of the latching engagement as the axial anti-detachment mechanism may be opposite to those in the first embodiment, while the key portion and groove portion of the keyway engagement as the anti-rotation mechanism are opposite to those in the first embodiment. Alternatively, the interlocking convex and concave shapes of the latching engagement as the axial anti-detachment mechanism may be the same as those in the first embodiment, while the key portion and groove portion of the keyway engagement as the anti-rotation mechanism are opposite to those in the first embodiment.

[0167] As described above, in the second embodiment of the sealing pump 100, similarly to the first embodiment, a locking mechanism is employed. This locking mechanism engages the shaft fixing member housing portion 32d (insertion portion) of the rotor unit 10 with the peripheral wall 90d of the bottom opening portion 90aa, and includes an anti-rotation mechanism and an axial anti-detachment mechanism. This simultaneously eliminates both existing problem 1 (the sealing pump's increased size in the axial direction) and existing problem 2 (insufficient engagement due to the inability to visually inspect the locking mechanism). Furthermore, in the second embodiment of the sealing pump 100, similarly to the first embodiment, a keyway locking mechanism in the axial L direction is employed as an anti-rotation mechanism, thereby eliminating concern 1 (loosening of the locking mechanism due to external impact). Further, in the second embodiment of the sealing pump 100, similarly to the first embodiment, both a keyway locking mechanism in the axial L direction and a snap-locking mechanism in the axial direction are employed as anti-rotation mechanisms and axial anti-detachment mechanisms, thus eliminating concern 2 (reduced ease of installation and removal due to the two locking mechanisms). Furthermore, in the sealing pump 100 of the second embodiment, the axial anti-detachment mechanism and the anti-rotation mechanism are concentrated in the inclined portion 4c of the cylindrical mounting member 4 (the inclined portion 4c itself or close to the inclined portion 4c), thereby eliminating concern 3 (high manufacturing cost and difficulty in dimensional management of the engaging mechanism). Also, in the sealing pump 100 of the second embodiment, the axial length L of the inclined portion 4c is relatively small, thereby increasing the force exerted by the inclined portion 4c and simplifying the shape of the protrusion 4d. Therefore, concern 4 (insufficient retaining force of the snap-fit ​​due to the force of the extension) and concern 5 (complex dimensional management of the protrusion structure) can be eliminated simultaneously.

[0168] <Other>

[0169] The sealed pump 100 of this embodiment can, of course, be applied to all fluid devices and fluid circuits, including refrigeration units. Furthermore, the present invention is not limited to the embodiments described above, and appropriate changes and modifications can be made without departing from the technical concept of the present invention.

Claims

1. A sealed pump, characterized in that, have: A rotor unit having a rotor on which rotor magnets are disposed in an impeller component and which rotates about an axis, and a main housing for housing the rotor; A stator unit having a stator on which a coil is wound in a stator core through a coil frame housing, a base plate fixed to the other side of the coil frame housing, and a coil housing disposed on the other side of the base plate in a manner that protects the coil. as well as The engaging mechanism, in an assembled state where the rotor unit and stator unit are detachable and the rotor magnet is positioned inside the stator in the radial direction, allows the insertion portion of the rotor unit to be inserted into the bottom opening of the coil housing, and the insertion portion of the rotor unit and the peripheral wall of the bottom opening that defines the bottom opening engage with each other. The locking mechanism includes an anti-rotation mechanism and an axial anti-disengagement mechanism that respectively restrict the relative rotational direction and axial movement of the rotor unit and the stator unit.

2. The sealed pump according to claim 1, characterized in that, The anti-rotation mechanism is a keyway engagement, which consists of a key portion provided on either the insertion portion or the peripheral wall of the bottom opening portion and extending along the axial direction, and a groove portion provided on the other side and extending along the axial direction. When viewed from the axial direction, the key portion and the groove portion are engaged.

3. The sealed pump according to claim 2, characterized in that, The axial anti-disengagement mechanism is a snap-fit ​​mechanism, which consists of a protrusion that protrudes in the radial direction and is located on either the insertion part or the peripheral wall of the bottom opening, and a recess that is located on the other side and has a radially recessed shape that can accommodate the protrusion. When viewed from a direction orthogonal to the axis, the protrusion and the recess engage through the radial force generated between the insertion part and the peripheral wall of the bottom opening.

4. The sealed pump according to claim 1, characterized in that, The insertion portion of the rotor unit includes a circular plate-shaped mounting member, which has a circular plate-shaped fixing portion and an extension portion extending from the inner periphery of the circular plate-shaped fixing portion toward the other end in the axial direction. The anti-rotation mechanism and the axial anti-detachment mechanism are located on the extension of the circular plate-shaped mounting component.

5. The sealed pump according to claim 1, characterized in that, The insertion portion of the rotor unit includes a cylindrical mounting member, which has a cylindrical fixing portion and a portion of the other end periphery of the cylindrical fixing portion that protrudes radially outward when viewed from the axial direction and is inclined to the axis when viewed from a direction orthogonal to the axis. The anti-rotation mechanism and the axial anti-detachment mechanism are located on the inclined portion of the cylindrical mounting component.

Images