Plastic package motor with core positioning structure

Abstract

The utility model discloses a plastic package motor technical field's a kind of plastic package motor with iron core positioning structure, including the shell of plastic package motor, the inside of shell is placed with iron core ring, the inside of shell is equipped with the positioning piece for fixed iron core ring, the positioning piece includes the gasket ring of the inside of shell sliding connection, the inside of shell and close to the fixed ring of opening place screw joint, iron core ring is embedded the inside of shell, gasket ring is placed in one end of iron core ring, fixed ring and shell opening place screw joint rotation is pressed fixed to gasket ring, the multiple positioning strips of gasket ring side can be embedded in the positioning groove of one side of iron core ring, positioning strip embedding positioning groove increases the contact area of gasket ring and iron core ring, improves the stability that iron core ring is inlaid and positioned in shell.

Description

Technical Field

[0001] This utility model relates to the field of encapsulated motors, specifically an encapsulated motor with an iron core positioning structure. Background Technology

[0002] Encapsulated motors are widely used in household appliances and industrial equipment such as air conditioners, refrigerators, washing machines, and fans. As the core component of the encapsulated motor, the stability of the stator core in its installation with the motor housing 1 directly affects the motor's operating accuracy, vibration noise, and service life. The stator core needs to be precisely positioned inside the housing 1 to ensure a uniform air gap between it and the rotor. This avoids uneven air gap caused by core misalignment during operation, which can lead to increased electromagnetic noise, decreased efficiency, or even motor jamming. Currently, the stator core and housing installation of encapsulated motors are mainly divided into two types: integrated and detachable. However, both types of structures have irreconcilable contradictions and cannot simultaneously meet the dual requirements of stable installation and convenient disassembly, which restricts the maintenance efficiency and long-term reliability of the motor. Most mainstream encapsulated motors adopt a design where the stator core and the housing are integrated. The stator core (including windings) is placed in a mold, and high-temperature molten plastic (such as PBT or PA66) is directly wrapped around the core through injection molding, forming a motor housing that is tightly integrated with the core. The core advantage of this installation method is that it is fixed without gaps. After the plastic cools, it forms a strong mechanical bond with the surface of the core. However, the defects of the integrated installation are very prominent, which seriously affect subsequent maintenance. It cannot be disassembled, and the cost of repair and replacement is high. If the stator windings burn out or the silicon steel sheets of the core age during the operation of the motor, the housing and the core are completely solidified into one piece and cannot be separated. The entire motor must be replaced, which leads to a significant increase in maintenance costs. To address the maintenance challenges of integrated encapsulated motors, some manufacturers have attempted to use detachable stator installations. The motor housing is typically designed as a split unit (e.g., left and right housings connected by bolts), with the stator core directly fixed inside the housing using locating pins or bolts. While this method facilitates stator assembly and disassembly, it fails to meet the stability requirements of motor operation. It suffers from low positioning accuracy, large air gap deviation, and the tendency for slight housing deformation during bolt tightening, leading to core positioning misalignment. High-frequency vibrations generated during motor operation can cause locating pins to loosen and bolts to come loose, resulting in relative displacement between the core and housing. Long-term operation may cause friction between the core and rotor, damaging the motor. Therefore, a new encapsulated motor with a core positioning structure is needed to solve these problems. Utility Model Content

[0003] The purpose of this invention is to provide a plastic-encapsulated motor with an iron core positioning structure to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a plastic-encapsulated motor with an iron core positioning structure, comprising a housing of the plastic-encapsulated motor, an iron core ring placed inside the housing, a positioning member for fixing the iron core ring installed inside the housing, the positioning member including a washer ring slidably connected to the inside of the housing, and a fixing ring screwed to the inside of the housing near the opening.

[0005] Preferably, a plurality of circumferentially arranged positioning strips are fixedly connected to the side of the washer ring that is in contact with the iron core ring, and a plurality of circumferentially arranged positioning grooves are provided on one side of the iron core ring.

[0006] Preferably, the positioning component further includes three bolt rods arranged circumferentially on the outer side of the housing, and a plurality of circumferentially arranged fixing strips are fixedly connected to the outer wall of the washer. A locking hole is provided on one side of the fixing strip, a plurality of circumferentially arranged grooves are provided on the inner side wall of the housing, and a circumferentially arranged mounting hole is provided on the other side of the fixing ring.

[0007] Preferably, the other side of the housing has a plurality of circumferentially arranged vent holes.

[0008] Preferably, a plurality of circumferentially arranged positioning posts are fixedly connected inside the housing and near the other end. The positioning posts are inserted into one side of the iron core ring and are staggered with the vent holes.

[0009] Preferably, the outer ring of the fixing ring has three circumferentially arranged fixing grooves, which are used to provide space for the bolt rod to be inserted.

[0010] Preferably, one side of the fixing ring has a limiting part, and the limiting part is embedded in the other side of the pad ring.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. The iron core ring is embedded inside the housing, and the washer ring is placed at one end of the iron core ring. The fixing ring is screwed to the opening of the housing and rotated to squeeze and fix the washer ring. Multiple positioning strips on one side of the washer ring can be embedded in the positioning groove on one side of the iron core ring. The positioning strips embedded in the positioning groove increase the contact area between the washer ring and the iron core ring, and improve the stability of the iron core ring in the housing.

[0012] 2. The top of the bolt rod has an internal hexagonal opening. When the washer enters the housing, the fixing strip is embedded in the groove, which increases the fitting area between the washer and the housing and prevents the washer from shifting or shaking. Then, the bolt rod is screwed to the housing and rotated through the locking hole to lock the washer again, preventing the washer from rotating and reducing the stability of the stator positioning. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a left-side sectional perspective view of the overall structure of this utility model; Figure 3 The overall structure of this utility model Figure 2 Enlarged view of point A in the middle; Figure 4 The overall structure of this utility model Figure 2 Enlarged view at point B in the middle; Figure 5 This is a schematic diagram showing the disassembled structure of the core ring, washer ring, fixing ring, positioning groove, and mounting hole in the overall structure of this utility model.

[0014] In the diagram: 1. Housing; 2. Iron core ring; 3. Washer ring; 4. Fixing ring; 5. Positioning strip; 6. Positioning groove; 7. Bolt rod; 8. Fixing strip; 9. Locking hole; 10. Groove; 11. Mounting hole; 12. Vent hole; 13. Positioning post; 14. Fixing groove; 15. Limiting part. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example 1

[0017] Please refer to Figure 1-5 As shown, this utility model provides a plastic-encapsulated motor with an iron core positioning structure, including a housing 1 of the plastic-encapsulated motor, an iron core ring 2 placed inside the housing 1, a positioning component for fixing the iron core ring 2 installed inside the housing 1, the positioning component including a pad ring 3 slidably connected to the inside of the housing 1, and a fixing ring 4 screwed to the inside of the housing 1 near the opening.

[0018] In addition, the iron core ring 2 is embedded inside the housing 1, the pad ring 3 is placed at one end of the iron core ring 2, and the fixing ring 4 is screwed to the opening of the housing 1 to squeeze and fix the pad ring 3. Multiple positioning strips 5 on one side of the pad ring 3 can be embedded in the positioning groove 6 on one side of the iron core ring 2. The positioning strips 5 embedded in the positioning groove 6 increase the contact area between the pad ring 3 and the iron core ring 2, and improve the stability of the iron core ring 2 in the housing 1.

[0019] Specifically, a plurality of circumferentially arranged positioning strips 5 are fixedly connected to the side of the washer ring 3 that is in contact with the iron core ring 2. A plurality of circumferentially arranged positioning grooves 6 are opened on one side of the iron core ring 2. The positioning component also includes three bolt rods 7 arranged circumferentially with the outer side of the housing 1. A plurality of circumferentially arranged fixing strips 8 are fixedly connected to the outer wall of the washer ring 3. A locking hole 9 is opened on one side of the fixing strip 8. A plurality of circumferentially arranged grooves 10 are opened on the inner side wall of the housing 1. A circumferentially arranged mounting hole 11 is opened on the other side of the fixing ring 4. A circumferentially arranged fixing groove 14 is opened on the outer ring of the fixing ring 4. The fixing groove 14 is used to provide the insertion space for the bolt rods 7. A limiting part 15 is integrally formed on one side of the fixing ring 4. The limiting part 15 is embedded in the other side of the washer ring 3.

[0020] The top of the bolt rod 7 has an internal hexagonal opening. When the washer 3 enters the housing 1, the fixing strip 8 is embedded in the groove 10, which increases the fitting area between the washer 3 and the housing 1 and prevents the washer 3 from shifting or shaking. Then, the bolt rod 7 is screwed to the housing 1 and rotated through the locking hole 9 to lock and fix the washer 3 again, preventing the washer 3 from rotating and reducing the stability of the stator positioning.

[0021] Furthermore, the end of the bolt rod 7 passes through the locking hole 9 and is inserted into the fixing groove 14 to lock and fix the fixing ring 4 again, preventing the fixing ring 4 from rotating in the housing 1. The limiting part 15 on one side of the fixing ring 4 can be embedded into one side of the washer 3, increasing the contact area between the fixing ring 4 and the washer 3, and improving the stability of the fixing ring 4 in positioning and fixing the iron core ring 2 through the fixing washer 3.

[0022] More specifically, a plurality of vent holes 12 arranged in a circular pattern are provided on the other side of the housing 1, and a plurality of positioning posts 13 arranged in a circular pattern are fixedly connected inside the housing 1 and near the other end. The positioning posts 13 are inserted into one side of the iron core ring 2, and the positioning posts 13 are staggered with the vent holes 12.

[0023] Furthermore, the vent 12 facilitates gas flow and heat dissipation, and the positioning post 13 can position and fix the other end of the iron core ring 2 to prevent the other end of the iron core ring 2 from shifting and causing a decrease in stability.

[0024] Working principle: First, the iron core ring 2 is placed inside the housing 1. At this time, the positioning post 13 is embedded in one end of the iron core ring 2. Then, the washer ring 3 is placed in one end of the iron core ring 2. The fixing ring 4 is screwed to the opening of the housing 1 and rotated to squeeze and fix the washer ring 3. At this time, when the washer ring 3 enters the housing 1, the fixing strip 8 is embedded in the groove 10. Then, the bolt rod 7 is screwed to the housing 1 and rotated to pass through the locking hole 9 to lock and fix the washer ring 3 again. At the same time, the end of the bolt rod 7 passes through the locking hole 9 and is inserted into the fixing groove 14 to lock and fix the fixing ring 4 again, preventing the fixing ring 4 from rotating inside the housing 1.

[0025] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plastic-encapsulated motor with an iron core positioning structure, comprising a housing (1) of the plastic-encapsulated motor, characterized in that: A core ring (2) is placed inside the housing (1). A positioning element for fixing the core ring (2) is installed inside the housing (1). The positioning element includes a pad ring (3) that is slidably connected to the inside of the housing (1). A fixing ring (4) is screwed into the inside of the housing (1) near the opening.

2. A plastic-encapsulated motor with an iron core positioning structure according to claim 1, characterized in that: The pad ring (3) is fixedly connected to the side of the iron core ring (2) with a plurality of circumferentially arranged positioning strips (5), and the iron core ring (2) has a plurality of circumferentially arranged positioning grooves (6) on one side.

3. A plastic-encapsulated motor with an iron core positioning structure according to claim 2, characterized in that: The positioning component also includes three bolt rods (7) arranged circumferentially on the outer side of the housing (1), and multiple fixing strips (8) arranged circumferentially are fixedly connected to the outer side wall of the washer (3). A locking hole (9) is provided on one side of the fixing strip (8), and multiple grooves (10) arranged circumferentially are provided on the inner side wall of the housing (1). A mounting hole (11) arranged circumferentially is provided on the other side of the fixing ring (4).

4. A plastic-encapsulated motor with an iron core positioning structure according to claim 3, characterized in that: The other side of the housing (1) has a plurality of circumferentially arranged vent holes (12).

5. A plastic-encapsulated motor with an iron core positioning structure according to claim 2, characterized in that: The housing (1) is fixedly connected to a plurality of circumferentially arranged positioning posts (13) inside and near the other end. The positioning posts (13) are inserted into one side of the iron core ring (2), and the positioning posts (13) are staggered with the vent (12).

6. A plastic-encapsulated motor with an iron core positioning structure according to claim 3, characterized in that: The outer ring of the fixing ring (4) has three circumferentially arranged fixing grooves (14), which are used to provide space for the bolt rod (7) to be inserted.

7. A plastic-encapsulated motor with an iron core positioning structure according to claim 3, characterized in that: The fixing ring (4) has a limiting part (15) on one side, and the limiting part (15) is embedded in the other side of the pad ring (3).

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