CN214273963U

CN214273963U - Rotor structure in brushless drainage motor and drainage pump

Info

Publication number: CN214273963U
Application number: CN202120335369.3U
Authority: CN
Inventors: 杨皓
Original assignee: Changzhou Leili Motor Science & Technology Co ltd
Current assignee: Changzhou Leili Motor Science & Technology Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-09-24
Anticipated expiration: 2031-02-05

Abstract

The utility model discloses a rotor structure and a drainage pump in a brushless drainage motor, which comprises a rotating shaft, and an impeller, a pump body and a rotor which are sequentially sleeved on the rotating shaft along the axial direction, wherein the impeller and the rotor rotate synchronously with the rotating shaft; the axial both ends of the pump body are fixed with water conservancy diversion board mechanism and end cover respectively, and water conservancy diversion board mechanism is close to the impeller sets up, water conservancy diversion board mechanism is suitable for liquid to the liquid outlet direction guide, and the center of water conservancy diversion board mechanism has the third bearing, the center of end cover is equipped with the second bearing, second bearing and third bearing all assemble in the pivot. The utility model discloses respectively set up a bearing at rotor structure's axial both ends to form three group's bearing support structures with the bearing of motor casing department, the third bearing at axle output position can effectively prevent because the too big pivot that leads to of load from taking place eccentric phenomenon, and the bearing that is located the rotor both ends can effectively guarantee the axiality, does not take place eccentric phenomenon in high-speed rotatory, reduces the vibration.

Description

Rotor structure in brushless drainage motor and drainage pump

Technical Field

The utility model relates to the technical field of household appliances, especially, relate to a rotor structure and drain pump in brushless for drainage motor.

Background

At present, washing machine, set up heating structure in the pump case of the heating cycle drain pump among household electrical appliances such as dish washer, lead to the pump case at the ascending length extension of the axial of motor shaft, thereby lead to the pivot extension, only set up the bearing at the both ends of pivot among the current technical scheme, one of them bearing is located the bottom of pump case, another bearing is located the end cover of the pump case other end, because pivot length is longer, be greater than 100mm, and the end cover is the components of a whole that can function independently structure with the pump case, two bearing axialities are difficult to guarantee, can aggravate the degree of wear to the bearing when using for a long time, thereby seriously shorten the life of motor.

SUMMERY OF THE UTILITY MODEL

In order to solve the drain pump among the prior art and only set up the bearing at the both ends of pivot, when the pivot is longer, the axiality of two bearings is hardly guaranteed, leads to the bearing to be worn and torn, the technical problem that the motor life-span reduced, the utility model provides a rotor structure and drain pump among brushless drainage motor solve above-mentioned problem.

The utility model provides a rotor structure in a brushless drainage motor, which comprises a rotating shaft, an impeller, a pump body and a rotor, wherein the impeller, the pump body and the rotor are sequentially sleeved on the rotating shaft along the axial direction, and the impeller and the rotor rotate synchronously with the rotating shaft; the pump body is internally provided with a pump cavity for sealing a liquid medium; be equipped with inlet and liquid outlet on the pump body, the axial both ends of the pump body are fixed with deflector mechanism and end cover respectively, and deflector mechanism is close to the impeller sets up, deflector mechanism is suitable for liquid to the liquid outlet direction guide, and there is the third bearing in the center of deflector mechanism, the center of end cover is equipped with the second bearing, second bearing and third bearing all assemble in the pivot.

Further, the pump body includes the upper pump body and the lower pump body, the inlet is located on the upper pump body, the liquid outlet is located on the lower pump body, deflector mechanism and end cover are fixed in the both ends of the lower pump body, go up the pump body and enclose with the lower pump body and become the pump chamber.

Furthermore, a heating pipe is arranged in the pump cavity.

Furthermore, a plurality of guide plates are arranged on the circumferential outer side of the guide plate mechanism, and the guide plates gradually extend from one end to the other end of the guide plate mechanism in a circumferential inclined manner.

Furthermore, the circumference inboard of flow deflector mechanism is equipped with the bearing frame that supplies the pivot to pass, the third bearing assembly in the inner wall of bearing frame.

Preferably, a plurality of flow holes are arranged on the flow guide plate mechanism and the end cover.

Further, the bearing seat extends from one end of the pump body to the inside of the pump body; the center of the end cover extends from the other end of the pump body to the inside of the pump body and is sleeved on the periphery of the bearing seat.

The utility model also provides a drain pump, including stator module, motor casing and above the brushless for the drainage motor in the rotor structure, the motor casing is located the one end of the rotor structure in the brushless for the drainage motor is close to the rotor setting, motor casing and end cover fixed connection, stator module are located the periphery of rotor, be equipped with first bearing in the motor casing, first bearing assembly is in the pivot.

Preferably, the bearing parts assembled on the guide plate mechanism, the end cover and the motor shell are all provided with a knurling structure.

Preferably, the first bearing, the second bearing and the third bearing are in clearance fit with the rotating shaft.

The utility model has the advantages that:

(1) rotor structure and drain pump in brushless for drainage motor, respectively set up a bearing at rotor structure's axial both ends to form three group's bearing structure with the bearing of motor casing department, the third bearing at axle output position can effectively prevent because the too big pivot of leading to of load from taking place eccentric phenomenon, the bearing that is located the rotor both ends can effectively guarantee the axiality, does not take place eccentric phenomenon in high-speed rotation, reduces the vibration.

(2) Brushless for drainage rotor structure and drain pump in motor, the one end that is close to the impeller on the pump body still is provided with flow deflector mechanism, flow deflector mechanism can be with liquid to the guide of liquid outlet direction, the water outlet velocity is fast, avoids the inside turbulent flow that produces of pump chamber.

(3) Brushless for drainage motor in rotor structure and drain pump, bearing frame and end cover cup joint each other in the inside of the pump body, can protect the bearing on the one hand, reduce the contact of bearing and liquid, on the other hand can reduce the vibration noise.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is an exploded schematic view of an embodiment of a rotor structure in a brushless drainage motor according to the present invention;

FIG. 2 is a schematic structural view of the lower pump body according to the present invention;

fig. 3 is a perspective view of the deflector mechanism of the present invention;

fig. 4 is a perspective view of the middle end cap of the present invention;

fig. 5 is an exploded view of the drain pump of the present invention;

fig. 6 is a schematic cross-sectional view of a drain pump according to the present invention;

fig. 7 is an exploded view of the stator assembly of the present invention.

In the figure, 1, an impeller, 2, an upper pump body, 201, a liquid inlet, 3, a lower pump body, 301, a liquid outlet, 4, a magnetic ring injection molding assembly, 401, a rotor, 402, a rotating shaft, 5, a guide plate mechanism, 501, a guide plate, 502, a bearing seat, 6, an end cover, 7, a first bearing, 8, a second bearing, 9, a third bearing, 10, a shaft output position, 11, a torque output position, 12, a circulation hole, 13, a heating pipe, 14, a stator assembly, 1401, an iron core assembly, 1402, a coil framework, 1403, a connecting terminal, 15 and a motor shell.

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.

Example one

As shown in fig. 1 to 4, a rotor structure in a brushless drainage motor includes a rotating shaft 402, and an impeller 1, a pump body and a rotor 401 sequentially sleeved on the rotating shaft 402 along an axial direction, wherein the impeller 1 and the rotor 401 rotate synchronously with the rotating shaft 402; the pump body is internally provided with a pump cavity for sealing the liquid medium; be equipped with inlet 201 and liquid outlet 301 on the pump body, the axial both ends of the pump body are fixed with guide plate mechanism 5 and end cover 6 respectively, and guide plate mechanism 5 is close to impeller 1 setting, and guide plate mechanism 5 is suitable for liquid to the direction guide of liquid outlet 301, and there is third bearing 9 at the center of guide plate mechanism 5, and the center of end cover 6 is equipped with second bearing 8, and second bearing 8 and third bearing 9 all assemble on pivot 402.

The impeller 1 plays a role of shaft output, so that the liquid medium generates centrifugal force to realize the function of water drainage. Rotor 401 and pivot 402 form the magnetic ring subassembly 4 of moulding plastics through injection molding integral injection moulding, and pivot 402 plays the effect of transmission moment, and rotor 401 is the permanent magnet, provides permanent magnetic field, and the injection molding is used for fixed pivot 402 and rotor 401. The end cap 6 provides a support location for the second bearing 8 and the deflector mechanism 5 provides a mounting location for the third bearing 9.

The pump chamber is used for sealing liquid in certain space to inhale and extrude liquid by impeller 1's effect, inlet 201 is located the axial one end of the pump body, and liquid outlet 301 radially stretches out along the pump body, in this embodiment, the pump body includes the pump body 2 and the lower pump body 3, and inlet 201 is located the pump body 2, and liquid outlet 301 is located the lower pump body 3, and guide plate mechanism 5 and end cover 6 are fixed in the both ends of the lower pump body 3, go up the pump body 2 and enclose with the lower pump body 3 the pump chamber.

The guide plate mechanism 5 is positioned in the pump body, so that liquid in the pump body moves towards the wall surface of the pump body in a certain direction under the guide of the guide plate mechanism 5, and the liquid flowing to the liquid outlet 301 can be rapidly discharged, thereby improving the liquid discharge speed on one hand and being beneficial to improving the lift of the drainage pump on the other hand. The concrete structure is as follows: as shown in fig. 3, a plurality of flow deflectors 501 are arranged on the circumferential outer side of the flow deflector mechanism 5, and the flow deflectors 501 gradually extend in a circumferential direction from one end to the other end of the flow deflector mechanism 5 in an inclined manner. The circumferential inner side of the deflector mechanism 5 is provided with a bearing seat 502 for the rotating shaft 402 to pass through, and the third bearing 9 is assembled on the inner wall of the bearing seat 502. Can set up the assembly of annular knurl structure and second bearing 8 at the inner wall of bearing frame 502, in a similar way, the center of guide plate mechanism 5 also can set up annular knurl structure and the assembly of third bearing 9.

The shaft output position 10 is formed by the impeller 1, and the third bearing 9 is arranged at the shaft output end, so that the eccentric phenomenon of the rotating shaft 402 caused by overlarge load can be effectively prevented. The inside main circulation channel that is liquid medium of the pump body, consequently cause the pump body vibration very easily, third bearing 9 and second bearing 8 are located the both ends of the pump body, can effectively avoid pivot 402 off-centre, reduce vibration noise.

Since the liquid medium in the pump chamber needs to be communicated with the impeller 1, the baffle mechanism 5 needs to be provided with a plurality of axially-through flow holes 12, and the end cover 6 is also provided with a plurality of flow holes 12 in order to allow the liquid medium in the pump chamber to flow to the rotor 401 and to perform a lubricating function.

Example two

On the basis of the first embodiment, a heating pipe 13 is further arranged in the pump cavity, the heating pipe 13 can be fixed on the inner wall of the upper pump body 2 or the inner wall of the lower pump body 3, and the heating pipe 13 is in contact with a liquid medium to achieve the purpose of heating liquid. Can be used on a heated recirculating pump.

EXAMPLE III

In the first or second embodiment, the bearing seat 502 extends from one end of the pump body to the inside of the pump body; the center of the end cover 6 extends from the other end of the pump body to the inside of the pump body and is sleeved on the periphery of the bearing seat 502. As shown in fig. 6, the center of the end cover 6 and the bearing seat 502 are both columnar structures, the center of the columnar structure is provided with a shaft hole for the rotating shaft 402 to pass through, the third bearing 9 is located on the bearing seat 502 and close to one end inside the pump body, the second bearing 8 is located on the end cover 6 and close to one end of the end part of the pump body, the end cover 6 and the bearing seat 502 are sleeved with each other through the columnar structure extending axially, so that the rotating shaft 402, the second bearing 8 and the third bearing 9 are isolated from the liquid medium, and the impact on the rotating shaft 402 during the movement of the liquid medium is avoided.

Example four

A drainage pump, as shown in fig. 5, comprises a stator assembly 14, a motor casing 15 and the rotor structure in the brushless drainage motor, wherein the motor casing 15 is positioned at one end of the rotor structure in the brushless drainage motor and is arranged close to a rotor 401, the motor casing 15 is fixedly connected with an end cover 6, the stator assembly 14 is positioned at the periphery of the rotor 401, a first bearing 7 is arranged in the motor casing 15, and the first bearing 7 is assembled on a rotating shaft 402.

The motor shell 15 and the end cover 6 are fixed to form a rotor 401 cavity, the rotor 401 is located in the rotor 401 cavity, the stator assembly 14 is located outside the rotor 401 cavity, the shape of the stator assembly is square, and the stator assembly 14 generates an excitation magnetic field to interact with a permanent magnet magnetic field of the rotor 401 after being connected with an external circuit, so that the rotor 401 rotates. As shown in fig. 7, the stator assembly 14 mainly includes an iron core assembly 1401, a coil skeleton 1402, a connection terminal 1403, a terminal plastic casing and an enameled wire, the iron core assembly 1401 is made of a metal magnetic conductive material, a plurality of teeth are distributed on the inner circumference of the iron core assembly, and the coil skeleton 1402 and the iron core assembly 1401 are formed into an iron core injection molding assembly in a plastic-coated manner. The coil framework 1402 has two functions, namely, an insulation protection function and a support for winding of an enameled wire.

The rotor structure of the brushless drainage motor is used for generating the kinetic energy of rotation, and the drainage function of the drainage pump is realized through the rotation of the impeller 1. The motor housing 15 protects and supports the stator assembly 14, supports the rotor 401, isolates and contains the rotor 401 and the stator assembly 14.

The first bearing 7 is located at the bottom of the motor casing 15 and used for restraining the bottom of the rotating shaft 402 after assembly, and the bottom center of the motor casing 15 is assembled with the first bearing 7 through a knurled structure.

After the drainage pump is assembled, the rotating shaft 402 is restrained by the three bearings, so that the coaxiality of the rotating shaft 402 in long-term high-speed operation can be effectively ensured. The first bearing 7, the second bearing 8 and the third bearing 9 are in clearance fit with the rotating shaft 402, and the first bearing 7 is located at one end, close to the rotor 401, of the rotating shaft 402.

The torque output position 11 is formed by the rotor 401, and the first bearing 7 and the second bearing 8 are respectively arranged at two ends of the rotor 401, so that the coaxiality can be effectively ensured, and the eccentric phenomenon is not generated during high-speed rotation, thereby reducing vibration noise.

In the description of the present invention, it is to be understood that the terms "center", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

In this specification, the schematic representations of the terms are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A rotor structure in a brushless drainage motor is characterized in that: the pump comprises a rotating shaft (402), and an impeller (1), a pump body and a rotor (401) which are sequentially sleeved on the rotating shaft (402) along the axial direction, wherein the impeller (1) and the rotor (401) rotate synchronously with the rotating shaft (402); the pump body is internally provided with a pump cavity for sealing a liquid medium;

be equipped with inlet (201) and liquid outlet (301) on the pump body, the axial both ends of the pump body are fixed with water conservancy diversion board mechanism (5) and end cover (6) respectively, and water conservancy diversion board mechanism (5) are close to impeller (1) sets up, water conservancy diversion board mechanism (5) are suitable for liquid to liquid outlet (301) direction guide, and there is third bearing (9) at the center of water conservancy diversion board mechanism (5), the center of end cover (6) is equipped with second bearing (8), second bearing (8) and third bearing (9) all assemble in pivot (402).

2. The rotor structure in a brushless drainage motor according to claim 1, wherein: the pump body includes the upper pump body (2) and the lower pump body (3), inlet (201) are located on the upper pump body (2), liquid outlet (301) are located down on the pump body (3), deflector mechanism (5) and end cover (6) are fixed in the both ends of the lower pump body (3), go up the pump body (2) and enclose with the lower pump body (3) the pump chamber.

3. The rotor structure in a brushless drainage motor according to claim 1, wherein: and a heating pipe (13) is also arranged in the pump cavity.

4. The rotor structure in a brushless drainage motor according to claim 1, wherein: the circumference outside of guide plate mechanism (5) is equipped with a plurality of guide plates (501), guide plate (501) extend along circumference slope gradually by the one end to the other end of guide plate mechanism (5).

5. The rotor structure in a brushless drainage motor according to claim 4, wherein: and a bearing seat (502) for the rotating shaft (402) to penetrate through is arranged on the circumferential inner side of the flow guide plate mechanism (5), and the third bearing (9) is assembled on the inner wall of the bearing seat (502).

6. The rotor structure in a brushless drainage motor according to claim 1, wherein: and a plurality of circulation holes (12) are arranged on the flow guide plate mechanism (5) and the end cover (6).

7. The rotor structure in a brushless drainage motor according to claim 5, wherein: the bearing seat (502) extends from one end of the pump body to the interior of the pump body; the center of the end cover (6) extends from the other end of the pump body to the inside of the pump body and is sleeved on the periphery of the bearing seat (502).

8. A drain pump, characterized by: the brushless drainage motor comprises a stator assembly (14), a motor shell (15) and a rotor structure in the brushless drainage motor according to any one of claims 1 to 7, wherein the motor shell (15) is positioned at one end of the rotor structure in the brushless drainage motor and is arranged close to a rotor (401), the motor shell (15) is fixedly connected with an end cover (6), the stator assembly (14) is positioned at the periphery of the rotor (401), a first bearing (7) is arranged in the motor shell (15), and the first bearing (7) is assembled on a rotating shaft (402).

9. A sump pump according to claim 8, wherein: and knurling structures are arranged at the positions of assembling bearings on the flow guide plate mechanism (5), the end cover (6) and the motor shell (15).

10. A sump pump according to claim 9, wherein: the first bearing (7), the second bearing (8) and the third bearing (9) are in clearance fit with the rotating shaft (402).