Quadrupole outer rotor shaded pole motor

Abstract

The utility model provides a four-pole outer rotor shaded pole motor, which relates to the technical field of shaded pole motors and comprises a shell, and a plurality of cast-aluminum rotors are distributed on the inner wall of the shell. A rotating shaft is fixedly connected to the middle of the shell and provided with an oil bearing. A winding framework is arranged on the oil bearing, four winding positions are distributed on the winding framework, and a winding is arranged on each winding position; the rotating shaft is provided with an elastic component used for pressing the oil bearing to the shell, the elastic component comprises a clamping spring, a spring and a first wear-resisting gasket, and the clamping spring is fixed to the rotating shaft. The beneficial effects of the utility model are that the four-pole outer rotor shaded pole motor can effectively improve the low rotation speed stability and the torque; the rotating shaft, the cast-aluminum rotor and the shell are fixed in an interference fit manner by adopting anaerobic adhesive combination, so that the risk of loosening in later working is reduced; and the elastic component is arranged to press the oil bearing against the shell, so that the noise generated by axial movement of the oil bearing can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of shaded pole motor, especially a four-pole outer rotor shaded pole motor. BACKGROUND

[0002] The shaded pole induction motor is a simple single-phase induction motor, which is self-started by shielding one pole with a short-circuit ring. The short-circuit ring is also known as a shadow ring, which acts as a secondary winding. The shaded pole induction motor can be divided into two categories: salient pole type and hidden pole type. The power induction loss of these two types of motors is very high, and the power factor is also very low. The induction starting torque of the motor is very low. Due to these reasons, its efficiency is very low. In this regard, its rated power is low. However, due to the advantages of low cost, self-starting, simple and robust structure, high reliability, etc., the shaded pole motor is widely used in various household appliances, such as air fryers, ovens, fans, medical air pumps, warm air machines, dehumidifiers, warm bedding machines, water pumps, humidifiers, exhaust fans, washing machines, etc.

[0003] The existing salient pole type and hidden pole type shaded pole motors are both 2-pole inner rotor motors, and the motor torque is small. The 50Hz limit speed is close to 3000rpm, and the 60Hz limit speed is close to 3600rpm, which is suitable for some high-speed scenes. The salient pole type shaded pole motor is composed of one coil winding, and the hidden pole type shaded pole motor is composed of two distributed coil windings. Therefore, compared with the salient pole type shaded pole motor, the speed of the hidden pole type shaded pole motor is more stable, and the efficiency is higher. However, for some large load and low speed use scenes, the performance stability of the 2-pole shaded pole motor does not reach the ideal effect. In addition, when the inner rotor shaded pole motor uses oil-containing bearings, a certain axial gap needs to be left. The industry standard is generally 0.2-0.8mm. During operation, the wear-resistant gasket and rotor assembly may move back and forth, thereby generating noise.

[0004] Therefore, the applicant discloses a four-pole outer rotor shaded pole motor to overcome the above problems. UTILITY MODEL CONTENTS

[0005] The utility model overcomes the shortcomings in the prior art and provides a four-pole outer rotor shaded pole motor, which has stable speed and reduces noise caused by axial movement.

[0006] To solve the above technical problems, the utility model is implemented by the following technical solutions:

[0007] A kind of four-pole outer rotor shield pole motor, including shell, the inner wall of shell is distributed with several cast aluminum rotors;The middle part of shell is fixedly connected with rotating shaft, and oil-containing bearing is arranged on rotating shaft;Oil-containing bearing is provided with winding framework, and four winding positions are distributed on winding framework, and winding is arranged on each winding position;Rotating shaft is provided with elastic component for pressing oil-containing bearing to shell, and the elastic component includes snap spring, spring and first wear pad, snap spring is fixed on rotating shaft, and spring and first wear pad are sleeved on rotating shaft;Spring is located between snap spring and oil-containing bearing, and first wear pad is located on both sides of spring.

[0008] Further, stator core is arranged on the front and back sides of rotating shaft, and stator core is provided with support positioning hole, and further comprising motor mounting support, the leg of motor mounting support is inserted into support positioning hole and is fixed by screw.

[0009] Further, including rotor core, and the circumferential edge close to rotor core is provided with several cast aluminum grooves, and cast aluminum rotor is fixed in cast aluminum groove;The back of cast aluminum rotor is connected with the inner wall of shell, and first anaerobic adhesive layer is arranged between the back of cast aluminum rotor and the inner wall of shell;Cast aluminum rotor is interference fit with shell.

[0010] Further, the shell is provided with mounting hole, and second anaerobic adhesive layer is arranged between rotating shaft and mounting hole, and rotating shaft and mounting hole are interference fit.

[0011] Further, the root of oil-containing bearing is provided with circumferential avoidance slot.

[0012] Further, the end of oil-containing bearing away from avoidance slot is formed with threaded section, and nut is connected with threaded section.

[0013] Further, second wear pad is arranged between oil-containing bearing and shell, and second wear pad is sleeved on rotating shaft.

[0014] Further, shield short-circuit ring is arranged on stator core.

[0015] Further, rivet buckle position is arranged on rotor core close to circumferential edge.

[0016] Further, lead wire is connected with winding.

[0017] Compared with prior art, the beneficial effects of the utility model are:

[0018] The four-pole outer rotor shielded pole motor can effectively improve low speed stability and torque; the rotation shaft, the cast aluminum rotor and the shell are fixed by using anaerobic glue combined with interference fit, thereby reducing the risk of loosening in later period; the elastic member is arranged to press the oil-containing bearing against the shell, thereby reducing noise generated by axial movement of the oil-containing bearing. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the present application, and are used to explain the present application together with embodiments of the present application, and do not constitute limitations on the present application, and in the drawings:

[0020] Figure 1 is a general view of the four-pole outer rotor shielded pole motor according to the embodiments of the present application;

[0021] Figure 2 is Figure 1 is an enlarged view of the A circle in the figure;

[0022] Figure 3 is a front view of the winding framework according to the embodiments of the present application;

[0023] Figure 4 is a side view of the winding framework according to the embodiments of the present application;

[0024] Figure 5 is a front view of the stator core according to the embodiments of the present application;

[0025] Figure 6 is a front view of the rotor core according to the embodiments of the present application.

[0026] in the figure:

[0027] 1, shell; 101, mounting hole; 2, cast aluminum rotor; 3, rotation shaft; 4, oil-containing bearing; 401, air avoidance groove; 5, winding framework; 501, winding position; 6, winding; 7, clamp spring; 8, spring; 9, first wear-resistant gasket; 10, stator core; 1001, support positioning hole; 1002, shielded short circuit ring; 11, motor mounting support; 12, rotor core; 1201, cast aluminum groove; 1202, rivet buckle position; 13, nut; 14, second wear-resistant gasket; 15, lead wire; 16, screw. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present application are described below in combination with the drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and do not limit the present application.

[0029] As Figures 1 to 6The utility model provides a four pole outer rotor cover pole motor, including shell 1, the inner wall distribution of shell 1 is provided with a plurality of cast aluminium rotor 2, in this embodiment, shell 1 is sheet metal shell, cast aluminium rotor 2 is fixed in the inner wall of shell 1, still include rotor core 12, be provided with a plurality of cast aluminium groove 1201 close to the circumferential edge of rotor core 12, cast aluminium rotor 2 is fixed in cast aluminium groove 1201, the back of cast aluminium rotor 2 and the inner wall of shell 1 meet, and the back of cast aluminium rotor 2 and the inner wall of shell 1 between are provided with first anaerobic adhesive layer, when cast aluminium rotor 2 is fixed on rotor core 12, then in cast aluminium rotor 2 press in before in the inside of shell 1 coats a circle anaerobic adhesive, again cast aluminium rotor 2 is pressed in, and the contour outer ring that a plurality of cast aluminium rotor 2 surrounds forms and is interference fit with shell 1, therefore adopts anaerobic adhesive to combine the fixed mode of interference fit, help to enhance the stable degree of cast aluminium rotor 2 fixed in shell 1.

[0030] The middle part of shell 1 is fixedly connected with a rotating shaft 3, shell 1 is provided with a mounting hole 101, the rotating shaft 3 and the mounting hole 101 have a second anaerobic adhesive layer, and the rotating shaft 3 and the mounting hole 101 are interference fit; similarly, when the rotating shaft 3 is inserted into the mounting hole 101, anaerobic adhesive is applied to the mounting hole 101, and then the rotating shaft 3 is punched into the mounting hole 101; by adopting the fixing mode of anaerobic adhesive combined with interference fit, the fixing effect of the rotating shaft 3 in the shell 1 is enhanced.

[0031] The rotating shaft 3 is provided with an oil-impregnated bearing 4; the oil-impregnated bearing 4 is provided with a wire winding framework 5, and the wire winding framework 5 is provided with four wire winding positions 501; each wire winding position 501 is provided with a winding 6, and the winding 6 is connected with a lead wire 15 for power supply; the rotating shaft 3 is provided with an elastic member for pressing the oil-impregnated bearing 4 towards the shell 1, the elastic member presses the oil-impregnated bearing 4 towards the shell 1, which can reduce the noise caused by the axial movement of the oil-impregnated bearing 4; wherein the elastic member includes a clasp spring 7, a spring 8 and a first wear-resistant gasket 9, the clasp spring 7 is fixed on the rotating shaft 3, and the spring 8 and the first wear-resistant gasket 9 are sleeved on the rotating shaft 3; the spring 8 is located between the clasp spring 7 and the oil-impregnated bearing 4, and the first wear-resistant gasket 9 is located on both sides of the spring 8, so that the spring 8 has a pressing force on the oil-impregnated bearing 4, and the oil-impregnated bearing 4 is not easy to move axially.

[0032] The wire winding framework 5 is provided with a stator core 10 on both sides of the rotating shaft 3, the stator core 10 is sleeved and installed on the oil-impregnated bearing 4, the stator core 10 is provided with a support positioning hole 1001, and the motor mounting support 11 is further included, the support leg of the motor mounting support 11 is inserted into the support positioning hole 1001 and fixed by a screw 16, so that the motor mounting support 11, the wire winding framework 5 and the stator core 10 are fixed.

[0033] As Figure 2As shown, the root of the oil bearing 4 is provided with a circumferential clearance groove 401 to avoid assembly interference caused by excessive material at the corner; the end of the oil bearing 4 away from the clearance groove 401 is formed with a threaded section, the threaded section is connected with a nut 13, and the nut 13 is screwed into the threaded section to help limit the winding frame 5 and the stator core 10.

[0034] A second wear-resistant pad 14 is arranged between the oil bearing 4 and the shell 1, and the second wear-resistant pad 14 is sleeved on the rotating shaft 3; the second wear-resistant pad 14 and the first wear-resistant pad 9 both have the effect of increasing the contact area, reducing the pressure, and preventing loosening.

[0035] The stator core 10 is provided with a shield short circuit ring 1002, and the short circuit ring is equivalent to the secondary winding of the transformer to reduce vibration noise; this shield short circuit ring 1002 is prior art, and will not be described here.

[0036] The rotor core 12 is provided with a rivet buckle position 1202 near the circumferential edge, and after the rotor core 12 and the cast aluminum rotor 2 in the cast aluminum slot 1201 are installed to the shell 1, the rotor core 12 is fixed to the shell 1 by driving a rivet into the rivet buckle position 1202.

[0037] Finally, it should be noted that: the above is only the preferred embodiment of the present application, and is not used to limit the present application, although the present application is described in detail with reference to the embodiments, for those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some technical features can be replaced, but any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A four-pole outer rotor shaded pole motor, characterized in that: The invention comprises a housing (1), wherein a plurality of cast aluminum rotors (2) are distributed on the inner wall of the housing (1); a rotating shaft (3) is fixedly connected to the middle of the housing (1), and an oil-containing bearing (4) is provided on the rotating shaft (3); a winding skeleton (5) is provided on the oil-containing bearing (4), and four winding positions (501) are distributed on the winding skeleton (5), and each winding position (501) is provided with a winding (6); an elastic component for pressing the oil-containing bearing (4) toward the housing (1) is provided on the rotating shaft (3), and the elastic component comprises a retaining spring (7), a spring (8) and a first wear-resistant gasket (9); the retaining spring (7) is fixed on the rotating shaft (3), and the spring (8) and the first wear-resistant gasket (9) are sleeved on the rotating shaft (3); the spring (8) is located between the retaining spring (7) and the oil-containing bearing (4), and the first wear-resistant gasket (9) is located on both sides of the spring (8).

2. The four-pole outer rotor shaded pole motor according to claim 1, characterized in that: The winding frame (5) is provided with a stator core (10) along both the front and rear sides of the rotating shaft (3), the stator core (10) is provided with a bracket positioning hole (1001), and further comprises a motor mounting bracket (11), the legs of the motor mounting bracket (11) are inserted into the bracket positioning hole (1001) and fixed with screws (16).

3. The four-pole outer rotor shaded pole motor according to claim 2, characterized in that: The invention comprises a rotor core (12), a plurality of cast aluminum grooves (1201) are arranged near the circumferential edge of the rotor core (12), and the cast aluminum rotor (2) is fixed in the cast aluminum grooves (1201); the back of the cast aluminum rotor (2) is connected to the inner wall of the outer shell (1), and a first anaerobic adhesive layer is arranged between the back of the cast aluminum rotor (2) and the inner wall of the outer shell (1); the cast aluminum rotor (2) and the outer shell (1) are interference fit.

4. The four-pole outer rotor shaded pole motor according to claim 1, characterized in that: The housing (1) is provided with a mounting hole (101), a second anaerobic adhesive layer is provided between the rotating shaft (3) and the mounting hole (101), and the rotating shaft (3) and the mounting hole (101) are interference fit.

5. The four-pole outer rotor shaded pole motor according to any one of claims 1 to 4, characterized in that: The root of the oil-containing bearing (4) is provided with a circumferential air-avoiding groove (401).

6. The four-pole outer rotor shaded pole motor according to claim 5, characterized in that: A threaded section is formed on one end of the oil-containing bearing (4) away from the air-avoiding groove (401), and the threaded section is connected to a nut (13).

7. The four-pole outer rotor shaded pole motor according to claim 6, characterized in that: A second wear-resistant gasket (14) is provided between the oil-containing bearing (4) and the housing (1), and the second wear-resistant gasket (14) is sleeved on the rotating shaft (3).

8. The four-pole outer rotor shaded pole motor according to claim 2, characterized in that: A pole-covering short-circuit ring (1002) is provided on the stator core (10).

9. The four-pole outer rotor shaded pole motor according to claim 3, characterized in that: The rotor core (12) has a rivet position (1202) located near the circumferential edge.

10. The four-pole outer rotor shaded pole motor according to claim 3, characterized in that: The winding (6) is connected to a lead wire (15).

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