Plastic package motor

Abstract

A plastic package motor belongs to the technical field of motors. The positioning hole and the rear clamping hole which are integrally formed at the same time are formed in the front end and the rear end of the plastic package shell respectively, limiting is conducted through the positioning hole and the front panel, the front panel is limited when the front panel is pressed into the plastic package shell, and the rear end cover is limited through the rear clamping hole; in the process that the rear end cover is pressed into the plastic package shell, the rear clamping hole can play a guiding role, displacement of the rear end cover and the plastic package shell can be avoided when the rear end cover and the plastic package shell are pressed into the plastic package shell, and therefore concentricity of the rotor and the stator is improved, and noise generated by an operation chamber due to uneven air gaps of the rotor and the stator is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to a plastic-encapsulated motor. Background Technology

[0002] Traditional iron-cased motors are currently the most commonly used type of motor. When assembling an iron-cased motor, the stator coils need to be pre-installed inside the iron casing, and then the rotor, front and rear end covers, and other components are installed onto the iron casing. The overall assembly process is quite cumbersome, and the concentricity between the rotor and stator is poor. In order to improve the production efficiency of motors, encapsulated motors, in which the stator coils and the casing are directly injection molded, have been developed. In existing motor structures, the stator casing and end covers are generally connected by rivets or bolts. The end covers can shift during installation, which also affects the concentricity between the rotor and stator, resulting in uneven air gaps in the motor, thus causing problems such as high motor noise and vibration. Summary of the Invention

[0003] The present invention aims to solve the technical problems existing in the prior art and provide a plastic-encapsulated motor.

[0004] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a plastic-encapsulated motor, including a plastic-encapsulated housing, a rear end cover, and a front panel. A through-shaft hole is provided in the middle of both the rear end cover and the front panel. The rear end cover is located at the rear end of the plastic-encapsulated housing, and the front panel is located at the front end of the plastic-encapsulated housing. The three are coaxially arranged. A positioning hole is provided on the front end face of the plastic-encapsulated housing. A positioning ring that mates with the positioning hole is provided on the end face of the front panel near the plastic-encapsulated housing. A rotor mounting cavity is provided in the middle of the housing. The front panel is located near the plastic-encapsulated housing. A front bearing mounting position is provided on one end face of the device, and a rear bearing mounting position is provided at the center of the rear end cover. Both the front and rear bearing mounting positions are provided with support bearings. A rotor is provided in the rotor mounting cavity of the plastic-encapsulated housing. The front and rear sections of the rotor are fixed in the support bearings. The rotor includes two connecting shaft heads, which extend to the outside through the shaft holes of the front panel and the rear end cover. A rear retaining hole is provided at the rear end of the plastic-encapsulated housing, and the rear end cover is embedded in the rear retaining hole. Multiple sets of corresponding bolt holes are provided between the front panel and the plastic-encapsulated housing.

[0005] Preferably, the bottom of the plastic-encapsulated housing is provided with two symmetrical support legs, and the two support legs and the plastic-encapsulated housing are integrally formed.

[0006] Preferably, the front panel is made of aluminum alloy.

[0007] Preferably, a stator core is embedded in the housing of the plastic-encapsulated housing at a position corresponding to the rotor.

[0008] Preferably, a power line and a signal line are led out from one side of the plastic-encapsulated housing.

[0009] The beneficial effects of this utility model are as follows: By setting positioning holes and rear locking holes that are integrally formed at both ends of the plastic-encapsulated housing, the positioning holes limit the front panel when it is pressed into the plastic-encapsulated housing, and the rear locking holes limit the rear end cover when it is pressed into the plastic-encapsulated housing. The rear locking holes can play a guiding role during the process of the rear end cover being pressed into the plastic-encapsulated housing, which can prevent displacement of both when they are pressed into the plastic-encapsulated housing, thereby improving the concentricity of the rotor and stator, avoiding uneven air gap between the rotor and stator, and preventing noise generated in the operating chamber. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0012] In the diagram: 1. Plastic-encapsulated housing; 2. Rear end cover; 3. Front panel; 4. Through-shaft hole; 5. Positioning hole; 6. Positioning ring; 7. Rotor mounting cavity; 8. Front bearing mounting position; 9. Rear bearing mounting position; 10. Support bearing; 11. Rotor; 12. Connecting shaft head; 13. Rear locking hole; 14. Bolt hole; 15. Support leg; 16. Stator core; 17. Power cable; 18. Signal cable. Detailed Implementation

[0013] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0014] Example: A plastic-encapsulated motor, such as Figures 1-2As shown, the device includes a plastic-encapsulated housing 1, a rear end cover 2, and a front panel 3. Both the rear end cover 2 and the front panel 3 have through holes 4 at their midpoints. The rear end cover 2 is located at the rear end of the plastic-encapsulated housing 1, and the front panel 3 is located at the front end of the plastic-encapsulated housing 1. All three are coaxially aligned. A positioning hole 5 is provided on the front surface of the plastic-encapsulated housing 1. A positioning ring 6, which mates with the positioning hole 5, is provided on the end face of the front panel 3 near the plastic-encapsulated housing 1. By simultaneously and integrally forming positioning holes 5 and rear locking holes 13 at both ends of the plastic-encapsulated housing 1, the positioning holes 5 and front panel 3 are used for positioning. The front panel 3 is positioned when pressed into the plastic-encapsulated housing 1. The rear locking holes 13 are used to position the rear end cover 2 during the pressing process of the rear end cover 2 into the plastic-encapsulated housing 1. The housing serves as a guide. A rotor mounting cavity 7 is provided in the middle of the housing. A front bearing mounting position 8 is provided on the end face of the front panel 3 near the plastic-encapsulated housing 1. A rear bearing mounting position 9 is provided at the center of the rear end cover 2. Support bearings 10 are provided in both the front bearing mounting position 8 and the rear bearing mounting position 9. A rotor 11 is provided in the rotor mounting cavity 7 of the plastic-encapsulated housing 1. The front and rear sections of the rotor 11 are fixed in the support bearings 10. The rotor 11 includes two connecting shaft heads 12. The two connecting shaft heads 12 extend to the outside through the shaft holes 4 of the front panel 3 and the rear end cover 2. A rear locking hole 13 is provided at the rear end of the plastic-encapsulated housing 1. The rear end cover 2 is embedded in the rear locking hole 13. Multiple sets of corresponding bolt holes 14 are provided between the front panel 3 and the plastic-encapsulated housing 1.

[0015] The bottom of the plastic-encapsulated housing 1 is symmetrically provided with two support legs 15, and the two support legs 15 are integrally formed with the plastic-encapsulated housing 1; the front panel 3 is made of aluminum alloy; the stator core 16 is embedded in the housing of the plastic-encapsulated housing 1 at the position corresponding to the rotor 11; a power line 17 and a signal line 18 are led out from one side of the plastic-encapsulated housing 1.

[0016] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A plastic encapsulated motor comprising a plastic encapsulated housing (1), a back end cover (2) and a front panel (3), characterized in that: The rear end cover (2) and the middle position of the front panel (3) are provided with through shaft holes (4), the rear end cover (2) is arranged at the rear end of the plastic package shell (1), the front panel (3) is arranged at the front end of the plastic package shell (1), and the three are coaxially arranged, a positioning hole (5) is arranged on the front end surface of the plastic package shell (1), a positioning ring (6) matched with the positioning hole (5) is arranged on the end surface of the side of the front panel (3) close to the plastic package shell (1), a rotor mounting cavity (7) is arranged in the middle of the shell, a front bearing mounting position (8) is arranged on the end surface of the front panel (3) close to the plastic package shell (1), a rear bearing mounting position (9) is arranged at the center position of the rear end cover (2), support bearings (10) are arranged in the front bearing mounting position (8) and the rear bearing mounting position (9), a rotor (11) is arranged in the rotor mounting cavity (7) of the plastic package shell (1), the front and rear sections of the rotor (11) are fixed in the support bearings (10), the rotor (11) comprises front and rear connecting shaft heads (12), the two connecting shaft heads (12) extend to the outside through the through shaft holes (4) of the front panel (3) and the rear end cover (2), the rear end of the plastic package shell (1) is provided with a rear clamping hole (13), the rear end cover (2) is embedded in the rear clamping hole (13), and a plurality of groups of bolt holes (14) corresponding to each other are arranged between the front panel (3) and the plastic package shell (1).

2. A plastic encapsulated motor as claimed in claim 1, wherein: The bottom of the plastic package shell (1) is symmetrically provided with two supporting legs (15), and the two supporting legs (15) and the plastic package shell (1) are integrally formed.

3. The plastic encapsulated motor of claim 1, wherein: The front panel (3) is made of aluminum alloy material.

4. The plastic encapsulated motor of claim 1, wherein: The stator core (16) is embedded in the position corresponding to the rotor (11) in the shell of the plastic package shell (1).

5. The plastic encapsulated motor of claim 1, wherein: The power line (17) and the signal line (18) are led out from one side of the plastic package shell (1). The front panel (3) is made of aluminum alloy material. The stator core (16) is embedded in the position corresponding to the rotor (11) in the shell of the plastic package shell (1). The power line (17) and the signal line (18) are led out from one side of the plastic package shell (1).

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