TWI649500B - Pump motor structure and its rotor - Google Patents

Abstract

The present invention relates to a pump motor structure and a rotor therefor. The pump motor structure includes a first cover, a pivot, a rotor and a stator. The first cover has a shaft seat. The pivot is disposed on the axle seat. The rotor is sleeved on the pivot, and the rotor comprises a rotor magnet, a sleeve and a plurality of water circulation grooves. The sleeve is coupled to the rotor magnet. The water circulation grooves are located between the rotor magnet and the pivot shaft, and the water circulation groove rings are disposed at the periphery of the pivot shaft. The stator ring is disposed at a periphery of the rotor.

Description

Pump motor structure and its rotor

The present invention relates to a motor structure and a rotor thereof, and more particularly to a pump motor structure and a rotor therefor.

Lubrication between the rotor and the pivot in the conventional motor generally uses lubricating oil as a lubricating medium, which forms an oil film between the rotor and the pivot to achieve the lubrication effect. However, when the above oil film lubrication method is carried out in water, the oil film is emulsified by contact with water, and thus it is not suitable for a water pump motor.

The pump motor is ideal for use as a lubricating medium due to its use in water. However, how to introduce water into the lubricating water film between the rotor and the pivot is a problem that must be overcome by the current pump motor.

Therefore, it is necessary to provide an innovative and progressive pump motor structure and its rotor to solve the above problems.

In one embodiment, a pump motor structure includes a first cover, a pivot, a rotor, and a stator. The first cover has a shaft seat. The pivot is disposed on the axle seat. The rotor is sleeved on the pivot, and the rotor comprises a rotor magnet, a sleeve and a plurality of water circulation grooves. The sleeve is coupled to the rotor magnet. The water circulation grooves are located between the rotor magnet and the pivot shaft, and the water circulation groove rings are disposed at the periphery of the pivot shaft. The stator ring is disposed at a periphery of the rotor.

In one embodiment, a rotor includes a rotor magnet, a bushing, and a plurality of water flow channels. The rotor magnet has a hollow portion. The sleeve is coupled to the hollow portion of the rotor magnet. The water circulation grooves are located in the hollow portion of the rotor magnet.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective exploded view showing the structure of a water pump motor of the present invention. Figure 2 shows a perspective assembled view of the pump motor structure of the present invention. Figure 3 is a cross-sectional view of the pump motor structure of the present invention taken along line A-A of Figure 2; Referring to Figures 1, 2 and 3, the pump motor structure 1 of the present invention includes a first cover 10, a pivot 20, a rotor 30 and a stator 40. In the embodiment, the pump motor structure 1 further includes a sealing cover 50 and a second cover 60.

The first cover 10 has a shaft seat 11, a water inlet portion 12, a water outlet portion 13, and a water guiding structure 14. This water inlet portion 12 corresponds to the shaft seat 11. The water outlet portion 13 is located on one side of the water inlet portion 12. The water guiding structure 14 corresponds to the water inlet portion 12.

Figure 4 shows a plan view of the first cover of the present invention. Referring to FIG. 1 , FIG. 3 and FIG. 4 , the water guiding structure 14 includes a second water blocking side plate 14P , two water guiding plates 14G and two water guiding arc surfaces 14S. The second water blocking side plates 14P are respectively disposed on two sides of the shaft seat 11 , and each of the water blocking side plates 14P and the shaft seat 11 has a spacing D therebetween. The two water deflectors 14G are disposed at intervals, and the two water deflectors 14G are located between the second water blocking side plates 14P. Each of the water guiding arc surfaces 14S is located between each of the water guiding plates 14G and each of the water blocking side plates 14P.

The pivot 20 is disposed on the axle seat 11 of the first cover 10.

Figure 5 shows a perspective view of the rotor of the present invention. Figure 6 shows a top plan view of the combination of the rotor of the present invention and the first cover. Referring to FIG. 3, FIG. 5 and FIG. 6, the rotor 30 is sleeved on the pivot 20, and the rotor 30 includes a rotor magnet 31, a sleeve 32 and a plurality of water circulation grooves 33. The rotor magnet 31 has a hollow portion 312. The sleeve 32 is coupled to the hollow portion 312 of the rotor magnet 31, and preferably, the sleeve 32 is injection molded to the hollow portion 312 of the rotor magnet 31. In the present embodiment, the sleeve 32 has an upper surface 32A, a lower surface 32B and an inner wall 32S extending between the upper surface 32A and the lower surface 32B.

The water circulation grooves 33 are located in the hollow portion 312 of the rotor magnet 31, and preferably, the water circulation grooves 33 are located between the rotor magnet 31 and the pivot shaft 20. In addition, the water circulation grooves 33 are disposed around the periphery of the pivot shaft 20. In the present embodiment, the water circulation grooves 33 are recessed in the inner wall 32S of the sleeve 32, and preferably, the water circulation grooves 33 communicate with the upper surface 32A of the sleeve 32 and the Lower surface 32B.

In this embodiment, the water guiding structure 14 is corresponding to the water circulation groove 33, and the second water blocking side plate 14P of the water guiding structure 14 can concentrate the water flow and prevent the water side flow, and the two water guiding plates 14G and The two water guiding arc surfaces 14S can introduce a water flow into the water circulation grooves 33.

In addition, in order to form a uniform lubricating water film between the sleeve 32 and the pivot 20, the number of the water circulation grooves 33 is greater than or equal to three, and preferably, the water circulation grooves 33 are Arranged in a ring shape.

In one embodiment, one end of the sleeve 32 can extend to form an impeller 34 that rotates in synchronization with the rotor 30 to draw water from outside the motor into the water inlet portion 12. Preferably, the impeller 34 is integrally molded with the sleeve 32.

In one embodiment, the rotor 30 can include a bearing 35 that is coupled to the sleeve 32 and that is located between the sleeve 32 and the pivot 20. In one embodiment, the bearing 35 is coupled to the sleeve 32 by injection molding, and preferably, the bearing 35 is a ceramic bearing.

Referring to Figure 7, there is shown a perspective view of a rotor of another embodiment of the present invention. In another embodiment, the bearing 35 has an outer wall 35S that can be recessed in the outer wall 35S of the bearing 35.

Referring again to FIGS. 1 , 2 and 3 , the stator 40 is disposed on the periphery of the rotor 30 . In this embodiment, the stator 40 is electrically connected to a control circuit board 70.

The sealing cover 50 is coupled to the first cover 10. The sealing cover 50 has a receiving portion 50U for receiving the rotor 30. In this embodiment, the stator 40 is disposed around the periphery of the receiving portion 50U of the sealing cover 50.

The second cover 60 is coupled to the sealing cover 50 to seal the stator 40 and the control circuit board 70, thereby preventing the stator 40 and the control circuit board 70 from being short-circuited by contact with water.

Referring to FIGS. 5 and 6, the water circulation grooves 33 of the present invention can form a uniform lubricating water film between the sleeve 32 and the pivot 20 and prevent the generation of air bubbles. Through the guidance of the water guiding structure 14, the water flow can be accelerated into the water circulation grooves 33, thereby maintaining the stability of the lubricating water film.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the scope of the present invention. The scope of the invention should be as set forth in the appended claims.

1‧‧‧Water pump motor structure

10‧‧‧First cover

11‧‧‧ shaft seat

12‧‧‧Water entrance

13‧‧‧Water Export Department

14‧‧‧Water guiding structure

14G‧‧‧ water deflector

14P‧‧‧Water retaining side panel

14S‧‧‧Water guide

20‧‧‧ pivot

30‧‧‧Rotor

31‧‧‧Rotor magnet

312‧‧‧ Hollow

32‧‧‧ bushings

32A‧‧‧Upper surface

32B‧‧‧ lower surface

32S‧‧‧ inner wall

33‧‧‧Water flow trough

34‧‧‧ Impeller

35‧‧‧ bearing

35S‧‧‧ outer wall

40‧‧‧ Stator

50‧‧‧ Sealing cover

50U‧‧‧Receipt Department

60‧‧‧Second cover

70‧‧‧Control circuit board

D‧‧‧ spacing

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective exploded view showing the structure of a water pump motor of the present invention.

Figure 2 shows a perspective assembled view of the pump motor structure of the present invention.

Figure 3 is a cross-sectional view of the pump motor structure of the present invention taken along line A-A of Figure 2;

Figure 4 shows a plan view of the first cover of the present invention.

Figure 5 shows a perspective view of the rotor of the present invention.

Figure 6 shows a top plan view of the combination of the rotor of the present invention and the first cover.

Figure 7 shows a perspective view of a rotor of another embodiment of the present invention.

Claims (33)

A pump motor structure comprising: a first cover body having a shaft seat; a pivot shaft disposed on the shaft seat; a rotor sleeved on the pivot shaft, the rotor comprising: a rotor magnet; a bush sleeve, The rotor magnet is coupled to the rotor magnet; and a plurality of water circulation grooves are located between the rotor magnet and the pivot shaft, and the water circulation groove rings are disposed at a periphery of the pivot shaft; and a stator is disposed at a periphery of the rotor . The pump motor structure of claim 1, wherein the rotor magnet has a hollow portion coupled to the hollow portion of the rotor magnet. The pump motor structure of claim 2, wherein the sleeve is injection molded to the hollow portion. The pump motor structure of claim 1, wherein the sleeve has an inner wall, and the water circulation grooves are recessed in the inner wall of the sleeve. The pump motor structure of claim 4, wherein the sleeve has an upper surface and a lower surface, the water circulation grooves communicating the upper surface and the lower surface. The water pump motor structure of claim 1, wherein the first cover body has a water guiding structure, and the water guiding structure corresponds to a water circulation groove. The pump motor structure of claim 6, wherein the water guiding structure comprises a second water blocking side plate, and the two water blocking side plates are respectively disposed on two sides of the shaft seat. The pump motor structure of claim 7, wherein each of the water retaining side plates has a spacing from the shaft seat. The water pump motor structure of claim 7, wherein the water guiding structure further comprises two water deflectors, the two water deflectors are spaced apart, and the two water deflectors are located between the second water retaining side plates. The pump motor structure of claim 9, wherein the water guiding structure further comprises two water guiding arc surfaces, each of the water guiding arc surfaces being located between each of the water guiding plates and each of the water blocking side plates. The pump motor structure of claim 6, wherein the first cover has a water inlet portion and a water outlet portion, the water guiding structure corresponding to the water inlet portion. The pump motor structure of claim 1, wherein the number of the water circulation grooves is greater than or equal to three. The pump motor structure of claim 1, wherein the water circulation grooves are arranged in an annular interval. The pump motor structure of claim 1, wherein the sleeve is injection molded to the rotor magnet. The pump motor structure of claim 1, wherein one end of the sleeve extends to form an impeller. The pump motor structure of claim 15, wherein the impeller is integrally molded with the sleeve. The pump motor structure of claim 1, wherein the rotor further comprises a bearing coupled to the sleeve and the bearing is located between the sleeve and the pivot. The pump motor structure of claim 17, wherein the bearing is coupled to the sleeve in an injection molding. The pump motor structure of claim 17, wherein the bearing has an outer wall, the water circulation grooves being recessed in the outer wall of the bearing. The pump motor structure of claim 1, further comprising a sealing cover coupled to the first cover, the sealing cover having a receiving portion for receiving the rotor. The pump motor structure of claim 20, wherein the stator ring is disposed at a periphery of the receiving portion of the sealing cover. The pump motor structure of claim 20, further comprising a second cover to which the second cover is coupled. A rotor comprising: a rotor magnet having a hollow portion; a bushing coupled to the hollow portion of the rotor magnet; and a plurality of water circulation grooves located in the hollow portion of the rotor magnet. The rotor of claim 23, wherein the sleeve is bonded to the hollow portion by injection molding. The rotor of claim 23, wherein the sleeve has an inner wall, and the water circulation grooves are recessed in the inner wall of the sleeve. The rotor of claim 25, wherein the sleeve has an upper surface and a lower surface, the water circulation grooves communicating the upper surface and the lower surface. The rotor of claim 23, wherein the number of the water circulation grooves is greater than or equal to three. The rotor of claim 23, wherein the water circulation grooves are arranged in an annular interval. The rotor of claim 23, wherein one end of the sleeve extends to form an impeller. The rotor of claim 29, wherein the impeller is integrally molded with the sleeve. The rotor of claim 23, further comprising a bearing coupled to the sleeve. The rotor of claim 31, wherein the bearing is coupled to the sleeve in an injection molding. The rotor of claim 31, wherein the bearing has an outer wall, the water circulation grooves being recessed in the outer wall of the bearing.