CN213450874U

CN213450874U - Connecting structure of rotor shaft and pump shell and fluid pump comprising same

Info

Publication number: CN213450874U
Application number: CN202022219596.8U
Authority: CN
Inventors: 刘玉宝; 蒲善建
Original assignee: Zhongshan Jingding Electric Appliance Co ltd
Current assignee: Zhongshan Jingding Electric Appliance Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-06-15
Anticipated expiration: 2030-09-30

Abstract

The utility model discloses a connection structure of rotor shaft and pump case and contain its fluid pump, the connection structure of rotor shaft and pump case includes: a rotor shaft; a connecting member provided at one end of the rotor shaft, the connecting member having a radially protruding extension portion; the pump shell is provided with a shaft seat part, and the shaft seat part covers and fixes the connecting piece. Because the shaft seat part covers the connecting part, the extending part on the connecting part is rather embedded into the shaft seat part in the radial direction, and the connecting strength of the rotor shaft and the pump shell is enhanced; when the rotor shaft is stressed, the extending part can provide supporting force for the rotor shaft, the rotor shaft is not easy to skew, and the pump shell is not easy to deform. The utility model discloses still disclose the fluid pump who contains the connection structure of above-mentioned rotor shaft and pump case, the rotor shaft is high with the joint strength of pump case, fluid pump job stabilization, long service life.

Description

Connecting structure of rotor shaft and pump shell and fluid pump comprising same

Technical Field

The utility model relates to a fluid pump technical field, in particular to connection structure of rotor shaft and pump case and contain its fluid pump.

Background

In the existing fluid pump, a rotor shaft is fixed on a pump shell, a rotor is rotatably arranged on the rotor shaft, an impeller is arranged on the rotor, a stator is arranged on the pump shell, and the stator is electrified to drive the rotor to rotate so as to drive the impeller to rotate. Both ends of the rotor shaft are generally fixed to the pump housing for the purpose of supporting the rotor shaft uniformly. In some cases, due to structural limitation, only one end of the rotor shaft can be fixed on the pump shell, and the rotor shaft is equivalent to form a cantilever beam. Under the weight of the rotor and impeller, the pump casing is subjected to a large load where it is connected to the rotor shaft. Especially for some plastic pump cases, if the strength of the connection between the pump case and the rotor shaft is insufficient, the pump case is easy to deform, so that the rotor shaft is inclined and loosened, the normal work of the fluid pump is influenced, and the service life of the fluid pump is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a connection structure of rotor shaft and pump case can strengthen the joint strength of rotor shaft and pump case.

The utility model discloses still provide a fluid pump of connection structure who has above-mentioned rotor shaft and pump case.

According to the utility model discloses a connection structure of rotor shaft and pump case of first aspect embodiment, it includes: a rotor shaft; a connecting member provided at one end of the rotor shaft, the connecting member having a radially protruding extension portion; the pump shell is provided with a shaft seat part, and the shaft seat part covers and fixes the connecting piece.

According to the utility model discloses connection structure of rotor shaft and pump case has following beneficial effect at least: the shaft seat part is coated with the connecting piece, and the extending part on the connecting piece is rather embedded into the shaft seat part in the radial direction, so that the connecting strength of the rotor shaft and the pump shell is enhanced; when the rotor shaft is stressed, the extending part can provide supporting force for the rotor shaft, the rotor shaft is not easy to incline, and the pump shell is not easy to deform.

According to some embodiments of the invention, the shaft seat portion is over-molded to the connecting member.

According to some embodiments of the utility model, be provided with the through-hole on the extension, be provided with in the through-hole with the portion of wearing to establish that the axle seat portion links to each other.

According to some embodiments of the invention, the through hole is provided in plurality and arranged around an axis of the rotor shaft.

According to some embodiments of the utility model, the connecting piece with the rotor shaft is split type structure, connecting piece fixed mounting in the rotor shaft.

According to some embodiments of the invention, the connecting piece and the rotor shaft are of an integral structure.

According to the utility model discloses a some embodiments, the connecting piece is provided with cup joints the hole, the one end of rotor shaft is fixed in cup joint the hole.

According to some embodiments of the utility model, the connecting piece includes axially extending's main part, cup joint the hole set up in the main part, the extension including set up in the flange structure of main part.

According to some embodiments of the invention, the shaft seat portion covers part of the rotor shaft.

According to a second aspect of the present invention, a fluid pump includes any one of the above-described rotor shaft and pump housing connection structures.

According to the utility model discloses fluid pump has following beneficial effect at least: by adopting the connecting structure of the rotor shaft and the pump shell, the connecting strength of the rotor shaft and the pump shell is high, the fluid pump works stably, and the service life is long.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic half-sectional view of a fluid pump according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

fig. 3 is a schematic structural view of a rotor shaft and connecting member forming assembly according to an embodiment of the present invention;

fig. 4 is an exploded view of a rotor shaft and a connecting member according to an embodiment of the present invention;

fig. 5 is an exploded view of a connector according to an embodiment of the present invention.

Reference numerals: the rotor comprises a rotor 1, an impeller 2, a stator 3, a rotor shaft 100, a connecting piece 200, an extension portion 210, a through hole 211, a sleeving hole 220, a main body portion 230, a sub-frame body 240, a pump shell 300, a shaft seat portion 310, a boss structure 311 and a penetrating portion 320.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 3, a connection structure of a rotor shaft and a pump case includes: a rotor shaft 100; a coupling member 200 provided at one end of the rotor shaft 100, the coupling member 200 having a radially protruding extension 210; the pump housing 300 is provided with a shaft seat 310, and the shaft seat 310 covers and fixes the connector 200. Because the shaft seat part 310 covers the connecting piece 200, the extending part 210 on the connecting piece 200 is embedded into the shaft seat part 310 in the radial direction, so that the connecting strength of the rotor shaft and the pump shell is enhanced; when the rotor shaft is stressed, the extension portion 210 can provide a supporting force for the rotor shaft, the rotor shaft is not prone to being inclined, and the pump shell is not prone to being deformed.

In this embodiment, the shaft seat 310 is formed by being over-molded on the connector 200, so that the shaft seat 310 covers the connector 200 more effectively and is combined more tightly. Of course, in some embodiments, other ways of wrapping the shaft seat 310 around the connector 200 may be used, and those skilled in the art may select the manner.

In this embodiment, the protruding portion 210 is provided with a through hole 211, and the through hole 211 is provided with a through portion 320 connected to the shaft seat portion 310. By the arrangement of the through-hole 320, the shaft seat 310 and the connecting member 200 can be combined more tightly. When the shaft seat portion 310 is formed by the two-shot molding, the molten plastic enters the through hole 211, and after cooling, the through hole 320 is formed integrally with the shaft seat portion 310.

In the present embodiment, the through-holes 211 are provided in plurality and arranged around the axis of the rotor shaft 100. In the present embodiment, four through holes 211 are provided. Of course, the number of through holes 211 can be selected as desired.

Referring to fig. 4, in the present embodiment, the connection member 200 and the rotor shaft 100 are a split structure, and the connection member 200 is fixedly mounted to the rotor shaft 100. In the present embodiment, the rotor shaft 100 is formed in a split structure, and the rotor shaft 100 and the connecting member 200 are manufactured separately and then assembled to form the rotor shaft 100. The split structure, the rotor shaft 100 and the coupling member 200 can be suitably selected in terms of their respective functions and manufacturing processes, thereby reducing the difficulty and cost of manufacturing. In this embodiment, the connecting element 200 may be made of a material with a stronger strength than the shaft seat 310, so as to strengthen the connection structure between the rotor shaft and the pump casing, for example, in this embodiment, the shaft seat 310 is made of plastic, and the connecting element 200 may be made of metal.

In other embodiments, it is envisioned that the coupling member 200 and the rotor shaft 100 are of a unitary construction, thereby reducing assembly processes.

In this embodiment, the connector 200 is provided with a socket hole 220, and one end of the rotor shaft 100 is fixed to the socket hole 220. Specifically, the rotor shaft 100 may be fixed to the socket hole 220 in an interference manner. The rotor shaft 100 and the coupling member 200 have a simple mounting structure and are easy to implement. Of course, in other embodiments, the coupling member 200 may be coupled to the rotor shaft 100 using other mounting structures, which may be selected by one skilled in the art based on the actual circumstances.

In this embodiment, the connector 200 includes a main body 230 extending axially, the socket hole 220 is disposed on the main body 230, and the protruding portion 210 includes a flange structure disposed on the main body 230. The above-mentioned connecting piece 200 is simple in structure and easy to implement.

In the present embodiment, the shaft seat 310 covers a portion of the rotor shaft 100, so that the rotor shaft 100 can be more stably connected to the pump housing. In the present embodiment, the shaft seat 310 has a boss structure 311, and the shaft seat 310 covers a portion of the rotor shaft 100 through the boss structure 311. Of course, in other embodiments, it is envisioned that the shaft seat portion 310 may only encase the connector 200.

Referring to fig. 5, in the present embodiment, the connection member 200 includes two sub-frame bodies 240 having the same structure, and the two sub-frame bodies 240 are combined to form the connection member 200. The structure of the subframe body 240 is similar to that of the connector 200 as a whole: the sub-frame body 240 is provided with a main body 230 extending in the axial direction, and one end of the main body 230 is provided with a flange structure as the extension 210. The flange structures of the two sub-frame bodies 240 are attached back to form the connecting member 200, and the two sub-frame bodies 240 are provided with through holes, and the two through holes form the sleeving holes 220 of the connecting member 200. Of course, it is envisioned that in some embodiments, the connector 200 may also include a single sub-frame 240. It should be understood that the above description merely presents several embodiments of the connector 200, and it is envisioned that the connector 200 may take other embodiments without limitation to the embodiments described above.

The above-described connecting structure of the rotor shaft and the pump housing may be manufactured by a method including: first, a rotor shaft 100 is manufactured, and one or two sub-housings 240 are manufactured to obtain a coupling member 200, the rotor shaft 100 and the coupling member 200 are assembled together by a press to form a rotor shaft assembly, and then the rotor shaft assembly is put into an injection mold to injection mold a pump housing 300 such that a shaft seating portion 310 covers and fixes the coupling member 200.

The fluid pump comprising the connection structure of the rotor shaft and the pump shell has the advantages that the connection strength of the rotor shaft 100 and the pump shell 300 is high, the operation of the fluid pump is stable, and the service life is long.

In the fluid pump structure shown in fig. 1, a rotor 1 is rotatably provided on a rotor shaft 100, an impeller 2 is provided on the rotor 1, and a stator 3 is provided on a pump housing 300.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. Connection structure of rotor shaft and pump case, its characterized in that includes:

a rotor shaft (100);

a connector (200) provided at one end of the rotor shaft (100), the connector (200) having a radially protruding extension (210);

a pump housing (300) provided with a shaft seat part (310), wherein the shaft seat part (310) covers and fixes the connecting piece (200).

2. The rotor shaft to pump housing connection according to claim 1, wherein the shaft seat (310) is overmolded to the connector (200).

3. The structure for connecting a rotor shaft and a pump housing according to claim 1 or 2, wherein a through hole (211) is provided in the protruding portion (210), and a through-hole (320) connected to the shaft seat portion (310) is provided in the through hole (211).

4. A rotor shaft and pump casing connection structure according to claim 3, wherein said through hole (211) is provided in plurality and arranged around the axis of said rotor shaft (100).

5. The structure for connecting a rotor shaft and a pump casing according to claim 1, wherein the coupling member (200) and the rotor shaft (100) are of a split structure, and the coupling member (200) is fixedly mounted to the rotor shaft (100).

6. A rotor shaft to pump housing connection according to claim 1, characterised in that the connection (200) and the rotor shaft (100) are of one-piece construction.

7. The structure for connecting a rotor shaft and a pump casing according to claim 5, wherein the coupling member (200) is provided with a socket hole (220), and one end of the rotor shaft (100) is fixed to the socket hole (220).

8. The rotor shaft and pump casing connection according to claim 7, wherein the connection piece (200) comprises an axially extending main body portion (230), the socket hole (220) is provided in the main body portion (230), and the protrusion (210) comprises a flange structure provided in the main body portion (230).

9. A rotor shaft and pump casing connection according to claim 1, characterised in that the shaft seat (310) covers part of the rotor shaft (100).

10. A fluid pump comprising the rotor shaft-pump casing connecting structure according to any one of claims 1 to 9.