CN110529386B

CN110529386B - Pump and washing equipment

Info

Publication number: CN110529386B
Application number: CN201810501971.2A
Authority: CN
Inventors: 王金水; 尹斌
Original assignee: Sanhua Aweco Appliance Systems Wuhu Co Ltd
Current assignee: Sanhua Aweco Appliance Systems Wuhu Co Ltd
Priority date: 2018-05-23
Filing date: 2018-05-23
Publication date: 2021-04-06
Anticipated expiration: 2038-05-23
Also published as: CN110529386A

Abstract

The invention provides a pump and washing equipment, wherein the pump comprises a driving device, the driving device is provided with a driving shaft, a rotor assembly sleeved on the driving shaft, a stator assembly positioned on the periphery of the rotor assembly and a plastic connecting piece arranged between the rotor assembly and the driving shaft, the plastic connecting piece is provided with a first wall spaced between the rotor assembly and the shaft wall of the driving shaft, at least one cavity extending along the axial direction of the driving shaft is arranged in the first wall, one end of the cavity is arranged in a sealing manner, and the other end of the cavity is provided with an opening. With the arrangement, the weight of the rotor assembly is reduced, the rotational inertia of the rotor assembly is reduced, the influence on the concentricity of the rotor assembly is reduced, the noise and abnormal vibration generated between the rotor assembly and the driving shaft are reduced, and the rotor assembly can be controlled more accurately.

Description

Pump and washing equipment

Technical Field

The invention relates to the field of household appliances, in particular to a pump and washing equipment.

Background

With the development of brushless motors, especially the popularization and application in the field of household appliances, brushless motors are highly approved because of the advantages of high power density, high efficiency and the like. Brushless motors are an industry that has developed rapidly in recent years, and many processes are in need of improvement.

In the prior art, the weight of a rotor core and a plastic part in the brushless motor is heavier, the rotor has large moment of inertia in the operation process of the motor, the adjustment amount in dynamic balance is large, and the motor generates abnormal vibration and noise due to poor concentricity in high-speed rotation of the motor, so that the motor is unsmooth in operation and directly influences the work of the motor.

Disclosure of Invention

The invention aims to provide a pump and washing equipment which are light in weight, small in vibration and small in noise.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a pump, includes drive arrangement is equipped with the drive shaft, the cover is located the rotor assembly of drive shaft, is located the stator assembly of rotor assembly periphery and set up in the rotor assembly with plastic connector between the drive shaft, plastic connector be equipped with the interval in the rotor assembly with first wall between the drive shaft axle wall, be equipped with the edge in the first wall at least one cavity that drive shaft axial direction extends, the sealed setting of cavity one end, the cavity other end is equipped with the opening.

Optionally, the rotor assembly is provided with a first end wall, a second end wall opposite to the first end wall, and an inner wall and an outer wall connecting the first end wall and the second end wall, the first end wall is provided with at least one limiting groove and/or the second end wall is provided with at least one limiting groove and/or the inner wall is provided with at least one limiting groove.

Optionally, the number of the limiting grooves is greater than or equal to 2, and the limiting grooves are symmetrically arranged.

Optionally, the plastic connecting piece is further provided with a fixing piece matched with the limiting groove, and the fixing piece is matched with the limiting groove to fix the plastic connecting piece.

Optionally, the plastic connecting member further includes clamping members disposed at two ends of the first wall, and the clamping members fix the plastic connecting member and the rotor assembly relatively.

Optionally, the driving shaft is further provided with a first chamber extending along the axial direction of the driving shaft and located in the shaft wall, and the shaft wall is provided with at least one water drainage portion penetrating in the radial direction.

Optionally, the pump is further provided with bearings which are sleeved on the driving shaft and located at two ends of the rotor assembly, and a projection of the bearings along the radial direction of the driving shaft is at least partially overlapped with a projection of the water discharging part.

Optionally, the drainage part is at least one drainage hole penetrating through the shaft wall in the radial direction, and a projection of the drainage hole is at least partially overlapped with a projection of the bearing.

Optionally, the pump includes a first bearing and a second bearing disposed at two ends of the rotor assembly, the water discharging portion includes a first water discharging portion and a second water discharging portion, and a projection of the first water discharging portion at least partially overlaps a projection of the first bearing, and a projection of the second water discharging portion at least partially overlaps a projection of the second bearing along the radial direction.

The invention also provides washing equipment which is provided with a pump and a washing cavity, wherein a liquid outlet pipeline of the pump is communicated with the washing cavity, and the pump also comprises the pump.

According to the technical scheme, the rotor assembly is provided with the plastic connecting piece, the plastic connecting piece is provided with the edge and is arranged on the first wall in the axial direction of the driving shaft, the cavity is formed in the first wall, the mass of the plastic connecting piece is reduced through the cavity, the rotational inertia of the rotor assembly is reduced, the influence on the concentricity of the rotor assembly is reduced, the noise and abnormal vibration generated between the rotor assembly and the driving shaft are reduced, and the rotor assembly can be controlled more accurately.

Drawings

FIG. 1 is a perspective view of the pump of the present invention.

Fig. 2 is a cross-sectional view of the present invention taken along a-a in fig. 1.

Fig. 3 is a partially exploded perspective view of the pump housing and cover of the present invention with the pump housing and cover removed.

Fig. 4 is a perspective view of the rotor assembly of the present invention.

Fig. 5 is a perspective view of the drive shaft of the present invention.

Fig. 6 is a perspective view of the impeller of the present invention.

Fig. 7 is a perspective view of the plastic connector of the present invention.

Fig. 8 is a perspective view of another angle of the plastic connector of the present invention.

FIG. 9 is a cross-sectional view of a rotor assembly of the present invention.

Fig. 10 is a schematic structural view of the right side of the plastic connecting piece of the invention.

FIG. 11 is a schematic view of a rotor assembly of the plastic connector of the present invention.

Fig. 12 is a cross-sectional view of B-B of fig. 11 in accordance with the present invention.

Reference numerals: 100-a pump; 1-a pump casing; 10-a second chamber; 11-a liquid inlet pipeline; 12-a heating device; 13-chamber wall; 14-a liquid outlet pipeline; 15-a third chamber; 2-a drive device; 21-a drive shaft; 211-a first water discharge portion; 2111-first drain hole; 212-a second drain; 2121-a second drain hole; 213-a chamber; 214-water inlet hole; 215-water outlet; 216-axial wall; 22-a rotor assembly; 221-a first end wall; 222-a second end wall; 223-inner wall; 224-outer wall; 23-a stator assembly; 231-a stator core; 232-stator winding; 24-a first bearing; 25-a second bearing; 26-plastic connectors; 261-a cavity; 2611-water through port; 2612-a second wall; 262-a first catch; 263-second retaining member; 264-a first boss; 265-a second boss; 266-a first rib; 267-a holder; 268 — central axial cavity; 269-a first wall; 27-a limiting groove; 29-a seventh chamber; 3-a water distribution disc; 30-a fourth chamber; 31-an annular partition wall; 310-a fifth chamber; 32-buckling; 33-wall; 4-a housing; 42-a housing; 5-an impeller; 51-a water inlet; 6-a scaffold; 60-a sixth chamber; 61-a disc-shaped body; 62-an annular wall body; 7-O ring; 8-O-shaped sealing rings; 9-a fixing piece; 91-outer peripheral surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 12, the present invention discloses a washing apparatus, which includes a pump 100, wherein the pump 100 includes a driving device 2, a water diversion disc 3 installed at a left end of the driving device 2, a housing 4 installed at a right end of the driving device 2, an impeller 5 installed at a left side of the water diversion disc 3, and a pump housing 1 covering an outer side of the impeller 5, and the pump housing 1 is provided with a second chamber 10 for accommodating the impeller 5.

The driving device 2 is a brushless dc motor capable of rotating forward and backward, and the brushless dc motor 2 includes a control circuit (not shown) for controlling the operation of the driving device 2, a driving shaft 21 electrically connected to the control circuit, a rotor assembly sleeved on the driving shaft, and a stator assembly located at the periphery of the rotor assembly. And the rotor assembly 22 and the stator assembly 23 are fixedly connected with the driving shaft 21. The impeller 5 is fixed to the left end of the drive shaft 21. The first bearing 24 is disposed on the driving shaft 21 and located between the impeller 5 and the rotor assembly 22, and the second bearing 25 is disposed on the driving shaft 21 and located between the rotor assembly 22 and the housing 4.

As shown in fig. 2, the water diversion disk 3 is provided with an annular partition wall 31 formed by extending up and down, a fourth chamber 30 located on the right side of the annular partition wall 31, a third wall 33 formed by extending rightward from the inner side edge of the annular partition wall 31 on the side close to the drive shaft 21, and a cylindrical fifth chamber 310 located in the third wall 33. The rotor assembly 22 is received within the fifth chamber 310. The stator assembly 23 is received in the fourth chamber 30, and the third wall 33 separates the rotor assembly 22 and the stator assembly 23. In the present embodiment, the stator assembly 23 is provided with a stator core 231 located at the outer periphery and a stator winding 232 located in the stator core 231. The stator core 231 forms a circumference (not numbered) having a first diameter around the drive shaft 21. The annular partition wall 31 of the water diversion disc 3 covers the outer side of the stator assembly 23 along the left-right direction, the circumference of the annular partition wall 31 has a second diameter, and the second diameter is smaller than or equal to the first diameter, so that the structure between parts of the pump 100 is compact, and the purpose of miniaturization of the pump 100 is achieved.

The pump 100 is further provided with a bracket 6 for fixing the bearing 21 and an O-ring 7 sealed between the bracket 6 and the first bearing 24. The water diversion disc 3 is matched with the bracket 6 through a buckle 32. The O-ring 7 is an O-shaped sealing ring.

The bracket 6 is provided with a disc-shaped main body 61 extending vertically, a sixth chamber 60 located at the center portion penetrating the disc-shaped main body 61, and an annular wall body 62 extending rightward from the right side surface of the disc-shaped main body. The sixth chamber 60 communicates with the fifth chamber 310 and their respective central axes are collinear. The annular wall 62 and the annular partition wall 31 of the water diversion disc 3 are mutually matched and clamped to separate the second chamber 10 from the rotor assembly 22 left and right.

The first bearing 24 is disposed on the left end of the rotor assembly 22 and sleeved on the driving shaft 21, and is disposed between the bracket 6 and the rotor assembly 22, and the O-ring 7 is used for sealing the first bearing 24 on the right side of the bracket 6. The left end of the first bearing 24 is received in the sixth chamber 60 of the bracket 6. The second bearing 25 is sleeved on the right end of the driving shaft 21 and located between the rotor assembly 22 and the housing 4. A third sealing ring (not numbered) is also arranged between the water diversion disc 3 and the second bearing 25 to achieve sealing between the water diversion disc 3 and the second bearing 25.

The pump case 1 is equipped with inlet channel 11, the shade is in the chamber wall 13 of second chamber 10 periphery, with chamber wall 13 connect and with go out the liquid pipeline 14 of second chamber 10 intercommunication and with 3 snap-fit's of water diversion tray outer fringe. An O-shaped sealing ring 8 is further arranged between the outer edge and the water distribution disc 3, and the O-shaped sealing ring 8 is used for sealing the pump shell 1 to prevent liquid in the second chamber 10 from leaking outwards. When the pump shell 1 is sealed with the water diversion disc 3, the O-shaped sealing ring 8 is compressed and deformed along the radial direction, so that the radial sealing between the pump shell 1 and the water diversion disc 3 is realized. So set up, also reduced the volume of the pump 100 in the radial direction, whole makes the compact structure of pump 100.

A third chamber 15 is formed between the pump shell 1 and the impeller 5, the third chamber 15 is a water inlet chamber, a heating device 12 is fixed at a position, close to the liquid inlet pipeline 11, of the pump shell 1, and the heating device 12 is used for heating water in the third chamber 15. The impeller 5 is accommodated in the second chamber 10, and a water inlet 51 is formed at the center of the impeller 5.

The drive shaft 21 is hollow and has a shaft wall 216 and a chamber 213 extending axially within the shaft wall 216, the chamber 213 being in communication with the water inlet 51 of the impeller 5 such that water enters the chamber 213 through the water inlet 51. The driving shaft 21 is a graphite bearing or a ball bearing, but is not limited to these two bearings as long as the effects of the present invention are achieved. The shaft wall 216 is provided with a first drain portion 211 and a second drain portion 212 which are radially penetrated, the first drain portion 211 comprises at least one first drain hole 2111 along the radial direction of the driving shaft 21, the second drain portion 212 comprises at least one second drain hole 2121 along the radial direction of the driving shaft 21, the projection of the first drain portion 211 overlaps with the projection of the first bearing 24 along the radial direction, and the projection of the second drain portion 212 overlaps with the projection of the second bearing 25. The shape of the first drainage hole 2111 and the second drainage hole 2121 may be one of a strip, a circle and a square, or one of two or three of them, in this embodiment, the shapes of the first drainage hole 2111 and the second drainage hole 2121 are not limited to the three, as long as water can be sprayed out from the first drainage hole 2111 and/or the second drainage hole 2121, and the effect of cleaning sand and stones around the driving shaft 21 is achieved. The driving shaft 21 includes a water inlet hole 214 at a left end of the driving shaft 21, and a water outlet hole 215 at a right end opposite to the left end of the driving shaft 21. The chamber 213 communicates with the first and

second drain holes

2111 and 2121. In this embodiment, the first drain portion 211 includes 4 independent first drain holes 2111 arranged around the shaft wall 216 of the driving shaft 21, and the second drain portion 212 includes 4 independent second drain holes 2121 arranged around the shaft wall 216 of the driving shaft 21, so that the first and

second bearings

24 and 25 and the driving shaft 21 can have a good lubricating effect. In the pump 100, water enters from the liquid inlet pipe 11, enters the chamber 213 from the water inlet hole 214 at the left end of the driving shaft 21 through the water inlet 51 on the impeller 5, and flows out from the water outlet hole 215 at the right end of the driving shaft 21, and when the driving shaft 21 rotates at a high speed, the water in the chamber 213 is ejected outwards from the first water outlet hole 2111 and the second water outlet hole 2121 to form a water flow for flushing the first bearing 24 and the second bearing 25, so that the dry grinding phenomenon between the first bearing 24 and the driving shaft 21 and between the second bearing 25 and the driving shaft 21 is avoided, the lubrication between the first bearing 24 and the driving shaft 21 and between the second bearing 25 and the driving shaft 21 is constantly maintained, the working noise of the pump 100 is reduced, and the service life of the pump 100 is prolonged; meanwhile, since water is discharged from the first and second water discharge holes 2111 and 2121 at a high speed, impurities around the first and second bearings 24 and 25 can be removed, and abrasion of the first and second bearings 24 and 25 is reduced, thereby reducing abnormal vibration between the driving shaft 21 and the first and second bearings 24 and 25 and reducing noise. In this embodiment, water enters the chamber 213 from the water inlet 214 of the driving shaft 21, flows out through the water outlet 215, finally flows out from the small hole (not shown) on the water diversion disc 3, joins with the water in the third chamber 15, and is discharged from the liquid outlet pipe 14. In the water flowing process, the water quality between the water distribution disc 3 and the third chamber 15 can be quickly exchanged, and impurities in water are not easy to precipitate and are easy to discharge.

As shown in fig. 7 to 10, the driving device 2 is provided with a driving shaft 21, a rotor assembly 22 sleeved on the driving shaft 21, a stator assembly 23, and a plastic connecting member 26 disposed between the rotor assembly 22 and the driving shaft 21, wherein the plastic connecting member 26 is provided with a hollow first wall 269 spaced between the rotor assembly 22 and a shaft wall 216 of the driving shaft 21, and a central shaft cavity 268 accommodating the driving shaft 21, and the first wall 269 surrounds the periphery of the central shaft cavity 268 and is disposed in a hollow manner. At least one cavity 261 extending in the axial direction of the drive shaft 21 is provided in the first wall 269. The drive shaft 21 passes through the central shaft cavity 268 and is retained by the plastic connector 26.

The plastic connecting member 26 further includes retainers disposed at both ends of the first wall 269, and the retainers include a first retainer 262 extending leftwards along the axial direction of the driving shaft 21 and a second retainer 263 extending rightwards, and the retainers fix the plastic connecting member 26 and the rotor assembly 22 relatively. The first retaining member 262 is provided with a first boss 264 extending along the radial direction of the driving shaft 22, and a first rib 266 extending along the axial direction of the driving shaft 22 to the outer peripheral surface of the fixing member 9, wherein the first rib 266 limits the rotor assembly 22 along the axial direction of the driving shaft 22. The second retainer 263 extends in the radial direction of the drive shaft 22 to form a second boss 265, and the first boss 264 and the second boss 265 hold the rotor assembly 22 in the radial direction of the rotor assembly 22. The right end of the first wall 296 is provided with a water through hole 2611, the water through hole 2611 is communicated with the cavity 261 and the fifth chamber 310, the left end of the cavity 261 is provided with a second wall 2612, the second wall 2612 and the first convex rib 266 form a seventh chamber 29, and the seventh chamber 29 receives the fixing piece 9.

In the present embodiment, a plurality of the cavities 261 which are not communicated with each other are provided in the first wall 269, and the plurality of cavities 261 are symmetrically provided around the drive shaft 21. The plastic connecting piece 26 is light in weight, and the plurality of cavities 261 are formed in the connecting piece 26 to reduce the mass of the plastic connecting piece 26, so that the mass of the whole rotor assembly 22 is reduced, the rotational inertia of the rotor assembly 22 is reduced, the influence on the concentricity of the rotor assembly 22 is reduced, the noise and abnormal vibration generated by the pump 100 are reduced, the rotor assembly 22 can be controlled more accurately, and the working efficiency of the pump 100 is improved. Meanwhile, in the present embodiment, a cavity 261 is formed in the plastic connector 26, and water can flow into the cavity 261 from the water passage port 2611, so that the rotor assembly 22 is in sufficient contact with the cooling water in the cavity 261, thereby reducing the temperature inside the rotor assembly 22 of the pump 100.

As shown in fig. 11 and 12, the rotor assembly 22 includes a first end wall 221, a second end wall 222 opposite to the first end wall, and an inner wall 223 and an outer wall 224 connecting the first end wall 221 and the second end wall 222. The first end wall 221 is provided with at least one limiting groove 27 and/or the second end wall 222 is provided with at least one limiting groove 27 and/or the inner wall 223 is provided with at least one limiting groove 27, meanwhile, the joint of the first end wall 221 and the inner wall 223 can also be provided with at least one limiting groove 27 and/or the joint of the second end wall 222 and the inner wall 223 is provided with at least one limiting groove 27, and the limiting groove 27 is in an arc shape which is inwards concave. Of course, the rotor assembly 22 may also be provided with a plurality of limiting grooves 27, and the shape of the limiting grooves 27 is not limited, and the limiting grooves 27 are symmetrically disposed on the rotor assembly 22, in this embodiment, the limiting grooves 27 are symmetrically disposed along the radial direction of the driving shaft 21, or the limiting grooves 27 are symmetrically disposed along the axial direction of the driving shaft 21. The plastic connector 26 is further provided with a retainer 267 matched with the limiting groove 27, the retainer 267 is injected into the limiting groove 27 by injection molding, and the retainer 267 is matched with the limiting groove 27 to retain the plastic connector 26, so as to achieve a retaining effect. In other embodiments, the limiting groove 27 and the retainer 267 can be engaged with each other in other manners, and are not limited herein as long as the function of retaining the rotor assembly 22 can be achieved.

In summary, the rotor assembly 22 of the pump 100 of the present invention is provided with the plastic connecting member 26, and the plastic connecting member 26 is made of plastic material, so as to reduce the weight of the rotor assembly. Meanwhile, the plastic connecting piece 26 is provided with a first wall 269 along the axial direction of the driving shaft 21, a cavity 261 is arranged in the first wall 269, water flows into the cavity 261 to reduce the temperature of the pump 100, and meanwhile, the cavity 261 also reduces the mass of the plastic connecting piece 26, so that the rotational inertia of the rotor assembly 22 is reduced, the influence on the concentricity of the rotor assembly is reduced, the noise and abnormal vibration generated by the pump 100 are reduced, and the working efficiency of the pump 100 is improved.

Terms such as "upper," "lower," "left," "right," "front," "rear," and the like, used herein to denote relative spatial positions, are used for ease of description to describe one feature's relationship to another feature as illustrated in the figures. It will be understood that the spatially relative positional terms may be intended to encompass different orientations than those shown in the figures depending on the product presentation position and should not be construed as limiting the claims. In addition, the descriptor "horizontal" as used herein is not entirely equivalent to allowing an angular tilt along a direction perpendicular to the direction of gravity.

In addition, the above embodiments are only used for illustrating the invention and not for limiting the technical solutions described in the invention, and the understanding of the present specification should be based on the technical personnel in the field, and although the present specification has described the invention in detail by referring to the above embodiments, the ordinary skilled in the art should understand that the technical personnel in the field can still make modifications or equivalent substitutions to the present invention, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present invention should be covered in the claims of the present invention.

Claims

1. The utility model provides a pump, its characterized in that, includes drive arrangement, drive arrangement is equipped with the drive shaft, the cover is located the rotor assembly of drive shaft, be located the stator assembly of rotor assembly periphery and set up in the rotor assembly with plastic connector between the drive shaft, plastic connector be equipped with the interval in the rotor assembly with first wall between the drive shaft axial direction, be equipped with in the first wall and follow at least one cavity that the drive shaft axial direction extends, the sealed setting of cavity one end, the cavity other end is equipped with the opening.

2. The pump of claim 1, wherein: the rotor assembly is provided with a first end wall, a second end wall opposite to the first end wall, an inner wall and an outer wall, wherein the inner wall and the outer wall are connected with the first end wall and the second end wall, the first end wall is provided with at least one limiting groove, the second end wall is provided with at least one limiting groove, and/or the inner wall is provided with at least one limiting groove.

3. The pump of claim 2, wherein: the quantity more than or equal to 2 of spacing groove, the spacing groove is the symmetry and sets up.

4. The pump of claim 3, wherein: the plastic connecting piece is also provided with a fixing piece matched with the limiting groove, and the fixing piece is matched with the limiting groove to fix the plastic connecting piece.

5. The pump of claim 1, wherein: the plastic connecting piece further comprises clamping pieces arranged at two ends of the first wall, and the clamping pieces fix the plastic connecting piece and the rotor assembly relatively.

6. The pump of claim 1, wherein: the driving shaft is further provided with a first cavity which extends along the axial direction of the driving shaft and is positioned in the shaft wall, and the shaft wall is provided with at least one drainage part which is radially penetrated.

7. The pump of claim 6, wherein: the pump is further provided with bearings which are sleeved on the driving shaft and located at two ends of the rotor assembly, and the projection of the bearings along the radial direction of the driving shaft is at least partially overlapped with the projection of the drainage part.

8. The pump of claim 7, wherein: the drainage part is at least one drainage hole which penetrates through the shaft wall along the radial direction, and the projection of the drainage hole is at least partially overlapped with the projection of the bearing.

9. The pump of claim 8, wherein: the pump is including locating the first bearing and the second bearing at rotor assembly both ends, water drainage portion includes first water drainage portion and second water drainage portion, along radial direction, the projection of first water drainage portion with the projection of first bearing is at least partially overlapped, the projection of second water drainage portion with the projection of second bearing is at least partially overlapped.

10. A washing apparatus, characterized by: having a pump and a washing chamber, the outlet conduit of the pump communicating with the washing chamber, the pump further comprising a pump according to any of claims 1-9.