A plastic package structure brushless direct current motor structure
By wrapping the winding assembly of the brushless motor with an outer layer of adhesive and integrally injection molding it with the mounting base, the problems of easy conductor damage and poor sealing are solved, achieving higher protection performance and service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG ZHAOLI ELECTRIC GROUP CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-06-12
Smart Images
Figure CN224355907U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of brushless DC motor technology, and in particular to a plastic-encapsulated brushless DC motor structure. Background Technology
[0002] Brushless motors, as efficient and reliable drive devices, are widely used in many fields such as industrial automation, medical devices, and smart homes. They mainly consist of key components such as a base, iron core, permanent magnet, and rotating shaft. The conductors wound on the iron core are connected to the circuit, providing the necessary current for the motor to operate.
[0003] However, in existing brushless motor core structures, the conductors wound around the core are usually directly exposed. This design has significant drawbacks: during storage and handling before motor assembly, the exposed conductors are easily damaged by impacts from external objects. This not only increases the scrap rate and production costs but may also cause short circuits and other malfunctions in subsequent motor assembly due to conductor damage, affecting the normal operation of the motor. Furthermore, because the conductors are directly exposed, the overall sealing of the motor is poor. External moisture, dust, and corrosive gases can easily come into direct contact with the conductors, leading to corrosion and aging. This severely reduces the motor's waterproof and corrosion-resistant performance and service life, and also limits the application of brushless motors in harsh environments such as humid, dusty, or corrosive conditions. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a plastic-encapsulated brushless DC motor structure.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] The present invention provides a plastic-encapsulated brushless DC motor structure, which includes a rotating part, a fixed base, and an iron core fixed on the fixed base.
[0007] The rotating part consists of a rotating shaft rotatably connected to a fixed base and a rotating housing fixed to the rotating shaft; a permanent magnet shell sleeved on the outside of the iron core is fixed inside the rotating housing; a permanent magnet is disposed inside the permanent magnet shell;
[0008] The iron core is wound with a winding to form a winding assembly; the surface of the winding assembly is provided with an outer adhesive to wrap and fix the winding.
[0009] Furthermore, the outer coating and the fixing base are integrally injection molded.
[0010] Furthermore, the fixing base is evenly distributed with multiple connecting parts.
[0011] Furthermore, an impeller is fixed on the rotating part.
[0012] Furthermore, the impeller is fixed to the rotating housing.
[0013] Furthermore, the impeller is fixed on the rotating shaft.
[0014] Furthermore, the fixed base is disposed between the rotating housing and the impeller.
[0015] With the above structure, the beneficial effects of this utility model are as follows: the winding is a wire wound around the iron core, and a permanent magnet is set inside the permanent magnet shell; after the winding is energized, the rotating shaft and the rotating shell rotate relative to the fixed seat; after the winding is wrapped and sealed with outer rubber, the risk of damage to the winding circuit caused by bumps is reduced, and the sealing effect of the winding is improved, the risk of winding corrosion is reduced, the waterproof performance is improved, and the service life is guaranteed. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a structural diagram of the present invention after the rotating housing and the permanent magnet outer shell have been removed;
[0018] Figure 3 This is a structural diagram of the first state of the present invention, in which the impeller is fixed on the rotating housing;
[0019] Figure 4 This is a structural diagram of the second state of the present invention, in which the impeller is fixed on the rotating housing;
[0020] Figure 5 This is a diagram showing the state of the impeller fixed on the rotating shaft in this utility model;
[0021] Explanation of reference numerals in the attached figures:
[0022] 1. Shaft; 2. Rotating housing; 3. Bearing; 4. Permanent magnet housing; 5. Iron core;
[0023] 6. Mounting base; 601. Outer coating; 602. Connecting part; 603. Terminal housing; 7. Impeller. Detailed Implementation
[0024] The present invention will be further described below with reference to the accompanying drawings.
[0025] like Figures 1 to 5 As shown, the encapsulated brushless DC motor structure of this utility model includes a rotating part, a fixed base 6, and an iron core 5 fixed on the fixed base 6.
[0026] The rotating part consists of a rotating shaft 1 rotatably connected to the fixed base 6 and a rotating housing 2 fixed to the rotating shaft 1; a permanent magnet shell 4 sleeved on the outside of the iron core 5 is fixed inside the rotating housing 2; a permanent magnet is provided inside the permanent magnet shell 4;
[0027] The iron core 5 is wound with a winding to form a winding assembly; the surface of the winding assembly is provided with an outer adhesive 601 to wrap and fix the winding.
[0028] The rotating shaft 1 is rotatably connected to the fixed base 6 via the bearing 3;
[0029] The winding consists of a wire wound around the iron core 5, and a permanent magnet is installed inside the permanent magnet shell 4. After the winding is energized, the rotating shaft 1 and the rotating shell 2 rotate relative to the fixed seat 6. After the winding is wrapped and sealed with outer rubber 601, the risk of damage to the winding circuit caused by bumps is reduced, and the sealing effect of the winding is improved, the risk of winding corrosion is reduced, the waterproof performance is improved, and the service life is guaranteed.
[0030] In a preferred embodiment of this utility model, the outer coating 601 and the fixing base 6 are integrally injection molded; after the iron core 5 with the winding is placed into the mold, the winding assembly is equivalent to an insert, and the iron core 5 is coated with rubber through the injection molding process; terminals are provided at both ends of the winding, and a terminal shell 603 is formed when the outer coating 601 and the fixing base 6 are formed. The terminal shell 603 is a female plug, and the terminal is inside the terminal shell 603. When it is connected with the external male plug, the motor circuit is connected by inserting the male plug into the female plug; the permanent magnet shell 4 can also be formed by injection molding.
[0031] In a preferred embodiment of this utility model, the fixing base 6 is provided with a plurality of connecting parts 602.
[0032] In a preferred embodiment of this utility model, an impeller 7 is fixed on the rotating part to generate airflow around the entire motor for heat dissipation.
[0033] In a preferred embodiment of this utility model, the impeller 7 is fixed on the rotating housing 2.
[0034] In a preferred embodiment of this utility model, the impeller 7 is fixed on the rotating shaft 1.
[0035] In a preferred embodiment of this utility model, the fixed base 6 is disposed between the rotating housing 2 and the impeller 7.
[0036] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.
Claims
1. A plastic-encapsulated brushless DC motor structure, characterized in that: It includes a rotating part, a fixed base (6) and an iron core (5) fixed on the fixed base (6); The rotating part consists of a rotating shaft (1) rotatably connected to a fixed base (6) and a rotating housing (2) fixed to the rotating shaft (1); a permanent magnet shell (4) sleeved on the outside of the iron core (5) is fixed inside the rotating housing (2); a permanent magnet is provided inside the permanent magnet shell (4); The iron core (5) is wound with a winding to form a winding assembly; the surface of the winding assembly is provided with an outer coating (601) to wrap and fix the winding.
2. The encapsulated brushless DC motor structure according to claim 1, characterized in that: The outer coating (601) and the fixing base (6) are integrally injection molded.
3. The encapsulated brushless DC motor structure according to claim 1, characterized in that: The fixing base (6) has multiple connecting parts (602) evenly distributed on it.
4. The encapsulated brushless DC motor structure according to claim 1, characterized in that: An impeller (7) is fixed on the rotating part.
5. The encapsulated brushless DC motor structure according to claim 4, characterized in that: The impeller (7) is fixed on the rotating housing (2).
6. The encapsulated brushless DC motor structure according to claim 4, characterized in that: The impeller (7) is fixed on the rotating shaft (1).
7. The encapsulated brushless DC motor structure according to claim 6, characterized in that: The fixed base (6) is disposed between the rotating housing (2) and the impeller (7).