WO2016061768A1

WO2016061768A1 - Electric motor and washing pump having same

Info

Publication number: WO2016061768A1
Application number: PCT/CN2014/089185
Authority: WO
Inventors: 彭小军; 史长忠; 朱成庄
Original assignee: 广东威灵电机制造有限公司
Priority date: 2014-10-22
Filing date: 2014-10-22
Publication date: 2016-04-28

Abstract

Disclosed are an electric motor (20) and a washing pump (1) having same. The electric motor (20) comprises a stator (100) and a rotor (300), wherein the stator (100) comprises a stator core (110), an insulation framework (120) and a stator winding, the stator (100) is internally provided with a front bearing chamber (210) located at the front end of the stator core (110) and a rear bearing chamber (130) located at the rear end of the stator core (110), and the stator (100) is provided with an air inlet hole (220) and an air outlet hole (160) for communicating a cavity of the stator core (110) with the outside; and the rotor (300) is arranged in the stator (100), a rotor shaft (310) of the rotor (300) is supported in the stator (100) by a front bearing (400) arranged in the front bearing chamber (210) and a rear bearing (500) arranged in the rear bearing chamber (130), and the rear end of the rotor (300) is provided with heat dissipation fan blades (320).

Description

Motor and washing pump with it

Technical field

The invention relates to an electric machine and a washing pump having the same.

Background technique

In the related art, a motor of a washing pump such as a dishwasher has a poor heat dissipation effect of a BMC (Block Molded Plastic) injection molded structure of a stator, resulting in an increase in temperature of the motor, and thus there is an improvement in demand.

Summary of the invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, the present invention proposes an electric motor which has the advantages of good heat dissipation effect and the like.

The invention also proposes a washing pump having the electric machine.

In order to achieve the above object, an embodiment of a first aspect of the present invention provides an electric motor including: a stator including a stator core, an insulating frame disposed on the stator core, and a winding a stator winding on the insulating frame, the stator has a front bearing chamber at a front end of the stator core and a rear bearing chamber at a rear end of the stator core, and the stator is provided with the stator core An air inlet hole and an air outlet hole communicating with the outside cavity, the air inlet hole being located between the front bearing chamber and the stator core, and the air outlet hole being located at the rear bearing chamber and the stator Between the iron cores; the rotor is disposed in the stator, and the rotor shaft of the rotor is supported on the stator through a front bearing disposed in the front bearing chamber and a rear bearing disposed in the rear bearing chamber Inside, the rear end of the rotor is provided with a heat dissipating fan blade.

The motor according to the embodiment of the invention has the advantages of good heat dissipation effect and the like.

Further, the motor according to the above embodiment of the present invention has the following additional technical features:

According to an embodiment of the present invention, the front bearing chamber is defined by a front metal bracket provided at a front end of the stator core, and the front metal bracket has an annular end plate on an outdoor side of the front bearing, the A wind hole is provided on the annular end plate.

According to an embodiment of the present invention, the front bearing chamber is defined by a front injection layer coated on a front end of the stator core, the front injection layer having an annular end portion on an outdoor side of the front bearing, An air inlet hole is provided on the annular end.

According to an embodiment of the present invention, the rear bearing chamber is defined by a post injection layer coated on a rear end of the stator core, the post injection layer having an outer side of the rear bearing and supporting the rear bearing chamber a plastic sealing bracket, the air outlet hole being disposed on the plastic sealing bracket.

According to an embodiment of the invention, the rear bearing chamber is defined by a rear metal bracket provided at a rear end of the stator core The air outlet hole is disposed on the rear metal bracket.

According to an embodiment of the invention, the rear bearing chamber is provided with a metal end cap, and the rear bearing is mounted in the metal end cap.

According to an embodiment of the invention, the front end face of the stator core is formed by plasticizing to form a fitting hole, and the front metal bracket is interference-fitted with the fitting hole.

According to an embodiment of the invention, the front metal bracket is provided with a grounding mounting hole.

According to an embodiment of the invention, the plastic sealing bracket is provided with a sinking groove for increasing the heat dissipation area.

According to an embodiment of the invention, the air outlet holes are plural and are arranged along a circumferential interval of the plastic sealing bracket.

According to an embodiment of the invention, the trailing edge of the heat dissipating vane extends rearward beyond the bottom wall of the air outlet and is exposed from the air outlet.

According to an embodiment of the second aspect of the present invention, a washing pump is provided, the washing pump comprising: a pump casing and a motor, the motor being the motor according to the first aspect of the invention, the pump casing and the motor Connected.

The washing pump according to the embodiment of the invention has the advantages of good heat dissipation effect and the like.

According to an embodiment of the present invention, the washing pump further includes a capacitor, the pump casing has a mounting arm, and a free end of the mounting arm is provided with a mounting hole, and the capacitor is mounted by a bolt fitted in the mounting hole On the mounting arm.

According to an embodiment of the invention, the outer wall of the stator is provided with a connecting boss, and the pump casing abuts against the connecting boss and is connected to the connecting boss by a bolt.

DRAWINGS

1 is an exploded view of a wash pump in accordance with an embodiment of the present invention.

2 is a schematic structural view of a washing pump in accordance with an embodiment of the present invention.

3 is a schematic structural view of a washing pump in accordance with an embodiment of the present invention.

4 is a schematic structural view of a washing pump in accordance with an embodiment of the present invention.

Figure 5 is a schematic view showing the structure of a washing pump in accordance with an embodiment of the present invention.

Figure 6 is a cross-sectional view of a wash pump in accordance with an embodiment of the present invention.

Fig. 7 is a schematic structural view of a rotor of a motor according to an embodiment of the present invention.

8 is a schematic structural view of a front metal bracket of a motor according to an embodiment of the present invention.

Reference numerals: washing pump 1, pump casing 10, mounting arm 11, mounting hole 12, motor 20, capacitor 30, stator 100, stator core 110, insulating frame 120, rear bearing chamber 130, fitting hole 140, sinking groove 150 The air outlet 160, the connecting boss 170, the post injection layer 180, the plastic sealing bracket 190, the metal end cover 131, the front metal bracket 200, the front bearing chamber 210, the air inlet 220, the ground mounting hole 230, the annular end plate 240, The rotor 300, the rotor shaft 310, the heat radiating blades 320, the front bearing 400, and the rear bearing 500.

detailed description

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

An electric motor 20 according to an embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1-8, a motor 20 according to an embodiment of the present invention includes a stator 100 and a rotor 300.

The stator 100 includes a stator core 110, an insulating frame 120 disposed on the stator core 110, and stator windings (not shown) wound around the insulating frame 120. The stator 100 has a front bearing chamber 210 at the front end of the stator core 110 and a rear bearing chamber 130 at the rear end of the stator core 110 (the front-rear direction is indicated by an arrow A in the drawing). The stator 100 is provided with an air inlet hole 220 and an air outlet hole 160 for communicating the inner cavity of the stator core 110 with the outside. The air inlet hole 220 is located between the front bearing chamber 210 and the stator core 110, and the air outlet hole 160 is located. Between the rear bearing chamber 130 and the stator core 110. The rotor 300 is disposed in the stator 100. The rotor shaft 310 of the rotor 300 is supported in the stator 100 through a front bearing 400 disposed in the front bearing chamber 210 and a rear bearing 500 disposed in the rear bearing chamber 130. The rear end of the rotor 300 is provided. There are cooling fins 320.

According to the motor 20 of the embodiment of the present invention, the air outlet hole 160 and the air inlet hole 220 that communicate the inner cavity of the stator core 110 with the outside are provided, and the heat dissipation vane 320 is disposed at the rear end surface of the rotor 300, so that the rotor When rotating, the outside air is introduced through the air inlet 220, and the introduced cold air flows to the front end through the gap between the outer circumferential surface of the rotor 300 and the inner circumferential surface of the stator core 110, and is carried in the flow. The heat in the inner cavity of the stator core 110 is taken out and finally discharged through the air outlet hole 160, thereby reducing the overall temperature rise of the motor 20. Therefore, the motor 20 according to the embodiment of the present invention has advantages such as a good heat dissipation effect.

An electric motor 20 according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

In some embodiments of the invention, as shown in FIGS. 1-8, a motor 20 in accordance with an embodiment of the present invention includes a stator 100 and a rotor 300.

As shown in FIGS. 1 and 6, the front bearing chamber 210 is defined by a front metal bracket 200 provided at the front end of the stator core 110. The front metal bracket 200 has an annular end plate 240 located outside the front bearing chamber 210, and the air inlet holes 220 are provided on the annular end plate 240.

Specifically, as shown in FIG. 8 , the air inlet holes 220 are long holes (ie, arc holes) extending along the circumferential direction of the annular end plate 240 , and the air inlet holes 220 may be plural and along the circumference of the annular end plate 240 . Set to equal spacing. In this way, under the condition of ensuring the structural strength of the front metal bracket 200, the surface area of the front metal bracket 200 can be utilized to the maximum extent, and the area of the air inlet hole 220 can be ensured, thereby improving the heat dissipation effect of the air inlet hole 220.

As shown in FIG. 1 , the front end surface of the stator core 110 is formed into a matching hole 140 by overmolding, and the front metal bracket 200 is interference-fitted with the matching hole 140 to realize positioning and mounting of the front metal bracket 200 .

Since the cost of the stretched front metal bracket 200 is much lower than the cost of cast aluminum or injection molding in the prior art, To reduce material costs. And since the front bearing chamber 210 does not need to be subjected to secondary processing, the coaxiality of the front bearing 400 and the rear bearing 500 can be facilitated, thereby reducing the noise of the motor 20.

Further, as shown in FIG. 8, the front metal bracket 200 is provided with a grounding mounting hole 230, and the grounding mounting hole 230 may be an inner flanged hole. When the motor 20 needs to be provided with a grounding device, the grounding device can be directly mounted on the front metal bracket 200 by screws fitted in the grounding mounting hole 230, thereby improving the safety of the operation of the motor 20.

In some specific examples of the invention, as shown in FIG. 6, the rear bearing chamber 130 is defined by a post injection layer 180 that is wrapped over the stator core 110. The post-injection layer 180 has a plastic stent 190 located outside the rear bearing chamber 130 for supporting the reinforced rear bearing chamber 130, and the air outlet 160 is disposed on the plastic stent 190.

After the winding of the stator core 110, the injection molding is performed, and the stator 100 is injected after the injection molding, thereby eliminating the post-order processing of the stator 100, thereby saving a large amount of manpower and material resources, simplifying the manufacturing process, and shortening the production cycle. And semi-finished product turnaround time.

Moreover, the rear bearing chamber 130 is directly formed by the post-injection layer 180, and the rear bearing 500 for supporting the rear end of the rotor shaft 310 can be received, so that the rear end cover of the motor in the prior art can be omitted, which not only simplifies assembly but also can be simplified. Reduce material costs.

As shown in FIG. 2, FIG. 5 and FIG. 6, the rear end surface of the plastic sealing bracket 190 is provided with a sinking groove 150, and the air outlet hole 160 is located on the inner wall of the sinking groove 150. There may be a plurality of sinking grooves 150, and the sinking grooves 150 are generally fan-shaped, and the plurality of sinking grooves 150 are disposed at equal intervals along the circumferential direction of the rear end surface of the plastic sealing bracket 190. Therefore, the heat sinking area of the plastic sealing bracket 190 can be increased by using the sinking groove 150, thereby facilitating the heat dissipation of the motor 20.

Optionally, in order to further improve the heat dissipation effect of the motor 20, a mesh hole (not shown) is disposed on the wall of the sinking groove 150, so that heat in the stator 100 can be further directly passed through the cold air entering the mesh hole. Heat exchange.

Wherein, the air outlet holes 160 may be plural and arranged along the circumferential interval of the plastic sealing bracket 190.

In some embodiments of the invention, the front bearing chamber 210 may also be defined by a front injection molded layer (not shown) that is wrapped around the front end of the stator core 110. The front injection molded layer has an annular end portion on the outdoor side of the front bearing, and an air inlet hole 220 is provided on the annular end portion.

By performing the injection molding after winding the stator core 110, the post-processing process of the stator 100 can be omitted, thereby saving a lot of manpower and material resources, simplifying the manufacturing process, and shortening the production cycle and the turnaround time of the semi-finished products.

Moreover, the front bearing chamber 210 is directly formed by the front injection molding layer, and the front bearing 400 for supporting the rear end of the rotor shaft 310 can be received, so that the front end cover of the motor in the prior art can be omitted, which not only simplifies assembly but also can be simplified. Reduce material costs.

Alternatively, the rear bearing chamber 130 is defined by a rear metal bracket (not shown) provided at the rear end of the stator core 110, and the air outlet hole 160 is provided on the rear metal bracket.

In some embodiments of the present invention, as shown in FIG. 6, a metal end cap 131 (BB is disposed in the rear bearing chamber 130). Cover), the rear bearing 500 is mounted within the metal end cap 131.

Further, in order to improve the cold air introduction effect of the heat dissipation blade 320, the trailing edge of the heat dissipation blade 320 extends beyond the bottom wall of the air outlet hole 160 and is exposed from the air outlet hole 160, that is, from the air outlet hole 160, To a part of the cooling fins 320. In other words, the rear end of the heat radiating vane 320 is located rearward of the bottom wall of the air outlet hole 160.

Alternatively, the heat dissipation fins 320 may be linear or curved. Preferably, as shown in FIG. 8, the heat dissipating blades 320 are arc-shaped and plural, and are disposed at equal intervals on the rear end surface of the rotor 300.

Other configurations and operations of the motor 20 in accordance with embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

A washing pump 1 according to an embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1-8, a washing pump 1 according to an embodiment of the present invention includes a pump casing 10 and an electric motor.

The motor is a motor 20 according to the above embodiment of the present invention, and the pump casing 10 is connected to the motor 20.

The washing pump 1 according to the present invention has an advantage of being excellent in heat dissipation effect by using the motor 20 according to the above-described embodiment of the present invention.

Specifically, as shown in FIG. 1 to FIG. 5, the outer wall of the stator 100 is provided with connection bosses 170. The connection bosses 170 may be disposed adjacent to the pump casing 10 and disposed in pairs in the radial direction of the stator 100, and the pump casing 10 abuts. The connecting boss 170 is connected to the connecting boss 170, and the pump casing 10 is connected to the connecting boss 170 by automatic screws or bolts, thereby facilitating the assembly of the pump casing 10 and the motor 20, and the connection is reliable and the operability is high.

In some embodiments of the present invention, as shown in FIGS. 1-4, the washing pump 1 further includes a capacitor 30, and the pump casing 10 is provided with an outwardly extending mounting arm 11, and the free end of the mounting arm 11 (ie, away from One end of the pump casing 10 is provided with a mounting hole 12, and the capacitor 30 is mounted on the mounting arm 11 by bolts fitted in the mounting hole 12. Therefore, the capacitor 30 can be mounted on the pump casing 10, that is, the structure for mounting the capacitor 30 is not required to be fabricated on the stator 100, which not only simplifies the structure and manufacturing process of the stator 100, but also facilitates the disassembly and assembly of the capacitor 30 and reliable installation. .

The washing pump 1 according to an embodiment of the present invention can be used in a dishwasher, and other configurations and operations of the washing pump 1 are known to those skilled in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" can be clearly indicated Or implicitly including at least one of the features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. Or in one piece; it may be a mechanical connection, or it may be an electrical connection or a communication with each other; it may be directly connected or indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship between two elements. Unless otherwise expressly defined. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the present invention, the first feature "on" or "under" the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A motor characterized in that:

a stator comprising a stator core, an insulating frame disposed on the stator core, and stator windings wound around the insulating frame, the stator having a front bearing chamber at a front end of the stator core And a rear bearing chamber at a rear end of the stator core, the stator is provided with an air inlet hole and an air outlet hole for communicating the inner cavity of the stator core with the outside, and the air inlet hole is located at the front bearing Between the chamber and the stator core and the outlet hole is located between the rear bearing chamber and the stator core;

a rotor, the rotor being disposed in the stator, a rotor shaft of the rotor being supported in the stator through a front bearing disposed in the front bearing chamber and a rear bearing disposed in the rear bearing chamber, the rotor The rear end is provided with cooling fins.
The motor according to claim 1, wherein said front bearing chamber is defined by a front metal bracket provided at a front end of said stator core, said front metal bracket having a ring end located outside said front bearing a plate, the air inlet hole is disposed on the annular end plate.
The motor according to claim 1, wherein said front bearing chamber is defined by a front injection molding layer coated on a front end of said stator core, said front injection molding layer having a ring shape on an outdoor side of said front bearing An end portion, the air inlet hole is disposed on the annular end portion.
The motor according to claim 1 or 2, wherein said rear bearing chamber is defined by a post injection layer coated on a rear end of said stator core, said post injection layer having an outer side of said rear bearing And a plastic sealing bracket supporting the rear bearing chamber, wherein the air outlet hole is disposed on the plastic sealing bracket.
The motor according to claim 1 or 3, wherein said rear bearing chamber is defined by a rear metal bracket provided at a rear end of said stator core, and said air outlet hole is provided on said rear metal bracket.
The electric machine according to any one of claims 1 to 3, wherein the rear bearing chamber is provided with a metal end cap, and the rear bearing is mounted in the metal end cap.
The motor according to claim 2, wherein a front end surface of the stator core is formed by a plasticizing to form a fitting hole, and the front metal bracket is interference-fitted with the fitting hole.
The motor according to claim 2, wherein said front metal bracket is provided with a grounding mounting hole.
The motor according to claim 4, wherein the plastic sealing bracket is provided with a sinking groove for increasing the heat dissipation area.
The motor according to claim 4, wherein the plurality of air outlet holes are plural and are arranged along a circumferential interval of the plastic sealing bracket.
The motor according to claim 4, wherein a trailing edge of the heat radiating vane extends rearward beyond the bottom wall of the air outlet hole and is exposed from the air outlet hole.
A washing pump, comprising: a pump casing and a motor, the motor being the motor according to any one of claims 1-11, the pump casing being connected to the motor.
A washing pump according to claim 12, wherein said washing pump further comprises a capacitor, said pump casing having a mounting arm, said free end of said mounting arm being provided with a mounting hole, said capacitor being engaged by said A bolt in the mounting hole is mounted on the mounting arm.
The washing pump according to claim 12, wherein the outer wall of the stator is provided with a connecting boss, and the pump casing abuts against the connecting boss and is connected to the connecting boss by a bolt.