Motor conduction structure and motor
By introducing designs such as slots, buckles, conduction bosses, and dovetail inserts into the motor conduction structure, the installation process of the motor conduction plate is simplified, solving the problems of complex assembly and bearing electrolytic corrosion in the existing technology, and improving the stability and lifespan of the motor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN KELIER INTELLIGENT CONTROL TECH CO LTD
- Filing Date
- 2025-08-11
- Publication Date
- 2026-07-24
AI Technical Summary
The existing motor conduction structure is complicated to install, which makes assembly time-consuming and labor-intensive. It is also prone to electrolytic corrosion due to excessive pressure difference between the inner and outer rings of the bearing, which affects the life of the motor.
The design employs a structure including slots, clips, conductive bosses, and dovetail inserts to simplify the installation process of the conductive plate. Furthermore, it ensures a stable connection by using an insulating fixing plate to fix the stator core at multiple points.
This simplifies the assembly process of the motor's conductive structure, improves assembly efficiency, enhances the motor's stability and service life, and reduces the occurrence of bearing electrolytic corrosion.
Smart Images
Figure CN224555289U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, and in particular to a motor conduction structure and a motor. Background Technology
[0002] When the motor rotates, voltages are induced inside the rotor, the motor's metal cover, and the stator core. However, because the induced voltages generated by the rotor and the metal cover are not equal, a voltage difference is formed. As the motor runs at a stable speed for a long time, this voltage difference increases. Since the inner ring of the rotor is connected to the inner ring of the bearing, and the metal cover of the motor is connected to the outer ring of the bearing, this voltage difference is directly reflected in the inner and outer rings of the bearing. The inner and outer rings of the bearing are directly insulated by the oil mold formed by lubricating grease when the bearing rolls. However, if the voltage difference between the inner and outer rings of the bearing exceeds a certain value, it will break down the oil mold of the bearing, resulting in discharge and the generation of current. This will cause localized melting of the inner surface of the bearing and the balls. This is the bearing electro-erosion phenomenon we are talking about in plastic-encapsulated brushless DC motors, which will cause operating noise and reduce the service life of the motor. To address this issue, existing technologies typically employ a conductive plate between the front and rear end covers. However, these conductive plates require an insulating plate for installation, and some installation structures are complex and time-consuming to assemble. Furthermore, the front end cover needs to be positioned and electrically connected to the conductive plate, which is detrimental to production. To ensure stable installation, a large insulating plate is required. All these structures are unfavorable for product manufacturing and assembly. Therefore, further improvements to the motor's conductive structure are necessary. Utility Model Content
[0003] In view of this, the present invention provides a motor conduction structure and a motor, and addresses the problems of the prior art by designing a slot buckle, a conduction boss, and a dovetail plug to solve the existing technical problems.
[0004] The objective of this utility model is achieved through the following technical solution:
[0005] A motor conduction structure includes an insulating fixing plate and a conduction plate. The front and rear ends of the insulating fixing plate are respectively fixed to the front and rear ends of the stator core of the motor. The conduction plate is fixedly disposed on the outside of the insulating fixing plate and its two ends are electrically connected to the front end cover and rear end cover of the front and rear sides of the housing, respectively. The conduction plate is provided with at least two slots penetrating the conduction plate. The outside of the insulating fixing plate is provided with corresponding buckles that are inserted into the slots for fixation. The conduction plate is positioned and fixed by inserting at least two buckles on the outside of the insulating fixing plate into the corresponding slots.
[0006] Furthermore, the outer side of the rear end cover is provided with a connection hole, the rear end of the conductive plate is directly fixed in the connection hole of the rear end cover and electrically connected to the rear end cover, the outer side of the front end of the conductive plate is provided with an outwardly protruding conductive boss, the front end mounting step of the outer shell is provided with a corresponding through hole exposed by the conductive boss, and when the front end cover is fastened to the mounting step, the inner ring tightly abuts against the conductive boss and is electrically connected.
[0007] Furthermore, the front end of the insulating fixing plate is provided with a protective plate sleeved on the front end of the stator core. The inner side of the front end of the protective plate is provided with a rearward-facing dovetail-shaped plug-in. The front end of the stator core is provided with a slot for the corresponding dovetail-shaped plug-in to be inserted. After the protective plate at the front end of the insulating fixing plate abuts against the front end of the stator core, the dovetail-shaped plug-in on the inner side is inserted into the slot for fixation.
[0008] Furthermore, the insulating fixing plate has a locking protrusion on each side of its rear end, and the stator core has a limiting groove on its rear end corresponding to the two locking protrusions. The rear end of the insulating fixing plate is fixed by the two locking protrusions on both sides locking into the limiting groove.
[0009] Furthermore, the insulating fixing plate has a tab on each of its rear ends facing backwards, and the stator core has a fixing hole on the outer edge of its rear end corresponding to the two tabs. The rear end of the insulating fixing plate is fixed by inserting the two tabs on both sides into the fixing hole.
[0010] In addition, an electric motor is provided, including a housing, a stator assembly fixedly disposed within the housing, and a rotor assembly rotatably disposed between a front end cover and a rear end cover and located at the center of the stator assembly, wherein the front end cover and the rear end cover are electrically connected through the motor conduction structure described in any of the above claims.
[0011] The beneficial effects of this utility model are as follows:
[0012] This utility model provides at least two straight-insertion buckles on the insulating fixing plate of the motor conduction structure. The conduction plate is provided with through slots corresponding to the straight-insertion buckles. When assembling the conduction plate, the buckles can be directly inserted into the slots to achieve positioning and fixing. The operation is simple, the assembly efficiency is high, and it saves time and labor.
[0013] An outwardly protruding conductive boss is provided on the outer side of the front end of the conductive plate, which can be directly and tightly fitted against the inner ring of the front end cover for electrical connection. Electrical connection can be achieved by installing the front end cover at any position, making assembly simpler.
[0014] The inner side of the front protective plate of the insulating fixing plate is equipped with a rearward-facing dovetail-shaped plug for fixing, which can greatly reduce the area of the protective plate and make the installation and fixing more secure.
[0015] The rear end of the insulating fixing plate is equipped with a locking protrusion that works in conjunction with a limiting groove or a insert with a fixing hole, so that the rear end can be fixed very securely. Together with the fixing at the front end of the insulating fixing plate, the insulating fixing plate can be effectively fixed to the outside of the stator core, providing a stable installation for the conductor plate. Attached Figure Description
[0016] Figure 1 This is an axial cross-sectional view of the motor conduction structure in this utility model;
[0017] Figure 2 This is a schematic diagram showing the disassembled motor conduction structure in this utility model;
[0018] Figure 3 This is a schematic diagram of the insulating fixing plate in this utility model;
[0019] Figure 4 This is a schematic diagram of Embodiment 1 of the present invention;
[0020] Figure 5 This is a schematic diagram of Embodiment 2 of this utility model.
[0021] The annotations in the attached figures are explained as follows:
[0022] Insulating fixing plate 10, buckle 11, protective plate 12, dovetail plug 13, locking protrusion 14, insert 15, conductive plate 20, slot 21, conductive boss 22, stator core 30, slot 31, limiting groove 32, fixing hole 33, outer shell 40, mounting step 41, through hole 42, front cover 50, rear cover 60, connecting hole 61. Detailed Implementation
[0023] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.
[0024] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.
[0025] To facilitate assembly and ensure a more secure installation, the specific details of this utility model are as follows.
[0026] Combination Figure 1 and Figure 2 As shown, an embodiment of this utility model is a motor conduction structure, including an insulating fixing plate 10 and a conduction plate 20. The front and rear ends of the insulating fixing plate 10 are respectively fixed to the front and rear ends of the motor stator core 30. The conduction plate 20 is fixedly disposed on the outside of the insulating fixing plate 10 and its two ends are electrically connected to the front end cover 50 and the rear end cover 60 on the front and rear sides of the outer casing 40, respectively. Importantly, the conduction plate 20 is provided with at least two slots 21 that penetrate the conduction plate 20. Generally, at least two points are provided here, which can effectively position and fix the conduction plate 20 in a straight line. Of course, more slots 21 can be provided as needed. The outer side of the insulating fixing plate 10 is provided with buckles 11 that are inserted into the corresponding slots 21 for fixing. The conduction plate 20 is positioned and fixed by inserting at least two buckles 11 into the corresponding slots 21 on the outer side of the insulating fixing plate 10.
[0027] The main feature of this utility model is that at least two straight-insertion buckles 11 are provided on the insulating fixing plate 10 of the motor conduction structure, and through slots 21 corresponding to the straight-insertion buckles 11 are provided on the conduction plate 20. When assembling the conduction plate, the buckles 11 can be directly inserted into the slots 21 to achieve positioning and fixing installation. The operation is simple, the assembly efficiency is high, and it saves time and labor.
[0028] Furthermore, in some embodiments, such as Figure 1 and Figure 2 As shown, to facilitate the installation of the end cap, a connecting hole 61 is provided on the outer side of the rear end cap 60. The rear end of the conductive plate 20 is directly fixed in the connecting hole 61 of the rear end cap 60 and electrically connected to the rear end cap 60. A protruding conductive boss 22 is provided on the outer side of the front end of the conductive plate 20. A corresponding through hole 42 is provided on the mounting step 41 at the front end of the outer shell 40. When the front end cap 50 is fastened onto the mounting step 41, the inner ring tightly abuts against the conductive boss 22 for electrical connection. With this design, the outwardly protruding conductive boss 22 on the outer side of the front end of the conductive plate 20 can directly and tightly abut against the inner ring of the front end cap 50 for electrical connection. Electrical connection can be achieved by installing the front end cap 50 at any position, making assembly simpler.
[0029] Furthermore, in some embodiments, such as Figure 2 and Figure 3As shown, to reduce the volume of the front end of the insulating fixing plate and ensure a more stable installation, the front end of the insulating fixing plate 10 is provided with a protective plate 12 that fits onto the front end of the stator core 30. A rearward-facing dovetail-shaped insert 13 is provided on the inner side of the front end of the protective plate 12. The front end of the stator core 30 is provided with a corresponding slot 31 for the dovetail-shaped insert 13 to be inserted. After the protective plate 12 at the front end of the insulating fixing plate 10 abuts against the front end of the stator core 30, the inner dovetail-shaped insert 13 is inserted into the slot 31 for fixation. This design, with the rearward-facing dovetail-shaped insert 13 on the inner side of the protective plate 12 at the front end of the insulating fixing plate 10 for fixation, can significantly reduce the area of the protective plate 12 and ensure a more stable installation.
[0030] In some embodiments, such as Figure 4 As shown, the insulating fixing plate 10 has a locking flange 14 on each side of its rear end. The stator core 30 has a limiting groove 32 on its rear end that corresponds to the two locking flanges 14. The rear end of the insulating fixing plate 10 is fixed by the two locking flanges 14 on both sides locking into the limiting groove 32. This flange limiting, together with the fixing of the front end of the insulating fixing plate 10, can effectively fix the insulating fixing plate 10 to the outside of the stator core 30, providing a stable installation for the conductor plate 20.
[0031] In some embodiments, such as Figure 5 As shown, the insulating fixing plate 10 has a tab 15 on each of its two rear-facing sides. The stator core 30 has a fixing hole 33 on the outer edge of its rear end, corresponding to the two tabs 15. The rear end of the insulating fixing plate 10 is fixed by inserting the two tabs 15 on both sides into the fixing hole 33. This insertion hole fixing structure, together with the fixing of the front end of the insulating fixing plate 10, can effectively fix the insulating fixing plate 10 to the outside of the stator core 30, providing a stable installation for the conductor plate 20.
[0032] Example 1:
[0033] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the motor conduction structure of this embodiment includes an insulating fixing plate 10 and a conduction plate 20. The front and rear ends of the insulating fixing plate 10 are respectively fixed to the front and rear ends of the motor stator core 30. The conduction plate 20 is fixedly disposed on the outside of the insulating fixing plate 10 and its two ends are electrically connected to the front end cover 50 and the rear end cover 60 on the front and rear sides of the outer casing 40, respectively. Importantly, the conduction plate 20 is provided with at least two slots 21 that penetrate the conduction plate 20. The outer side of the insulating fixing plate 10 is provided with corresponding buckles 11 that are inserted into the slots 21 for fixing. The conduction plate 20 is positioned and fixed by inserting at least two buckles 11 on the outer side of the insulating fixing plate 10 into the corresponding slots 21.
[0034] The rear end cover 60 is provided with a connection hole 61 on the outside. The rear end of the conductive plate 20 is directly fixed in the connection hole 61 of the rear end cover 60 and electrically connected to the rear end cover 60. The front end of the conductive plate 20 is provided with an outwardly protruding conductive boss 22. When the front end cover 50 is fastened to the front end mounting step 41 of the outer shell 40, the inner ring tightly fits against the conductive boss 22 on the front end of the conductive plate 20 and is electrically connected.
[0035] The front end of the insulating fixing plate 10 is provided with a protective plate 12 sleeved on the front end of the stator core 30. The inner side of the front end of the protective plate 12 is provided with a rearward dovetail insert 13. The front end of the stator core 30 is provided with a slot 31 for the dovetail insert 13 to be inserted. The front end of the insulating fixing plate 10 is abutted against the front end of the stator core 30 and the inner side of the dovetail insert 13 is inserted into the slot 31 for fixation.
[0036] The insulating fixing plate 10 has a locking protrusion 14 on each side of its rear end. The stator core 30 has a limiting groove 32 on its rear end that corresponds to the two locking protrusions 14. The rear end of the insulating fixing plate 10 is fixed by the two locking protrusions 14 on both sides being locked into the limiting groove 32.
[0037] In this embodiment, during the assembly of the conductive plate, the buckle 11 can be directly inserted into the corresponding slot 21 to achieve positioning and fixing installation. The operation is simple, the assembly efficiency is high, and it saves time and labor. The outer side of the front end of the conductive plate 20 is provided with an outwardly protruding conductive boss 22, which can be directly fitted and abutted against the inner ring of the front end cover 50 for electrical connection. Electrical connection can be achieved by installing the front end cover 50 at any position, making the assembly simpler. The inner side of the front end guard plate 12 of the insulating fixing plate 10 is provided with a rearward-facing dovetail-shaped plug 13 for fixing, which can greatly reduce the area of the guard plate 12 and make the installation and fixing more stable. This locking protrusion 14, together with the limiting groove 32, and the fixing of the front end of the insulating fixing plate 10, can effectively fix the insulating fixing plate 10 to the outside of the stator core 30, providing a stable installation for the conductive plate 20.
[0038] Example 2:
[0039] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the motor conduction structure of this embodiment includes an insulating fixing plate 10 and a conduction plate 20. The front and rear ends of the insulating fixing plate 10 are respectively fixed to the front and rear ends of the motor stator core 30. The conduction plate 20 is fixedly disposed on the outside of the insulating fixing plate 10 and its two ends are electrically connected to the front end cover 50 and the rear end cover 60 on the front and rear sides of the outer casing 40, respectively. Importantly, the conduction plate 20 is provided with at least two slots 21 that penetrate the conduction plate 20. The outer side of the insulating fixing plate 10 is provided with corresponding buckles 11 that are inserted into the slots 21 for fixing. The conduction plate 20 is positioned and fixed by inserting at least two buckles 11 on the outer side of the insulating fixing plate 10 into the corresponding slots 21.
[0040] The rear end cover 60 is provided with a connection hole 61 on the outside. The rear end of the conductive plate 20 is directly fixed in the connection hole 61 of the rear end cover 60 and electrically connected to the rear end cover 60. The front end of the conductive plate 20 is provided with an outwardly protruding conductive boss 22. When the front end cover 50 is fastened to the front end mounting step 41 of the outer shell 40, the inner ring tightly fits against the conductive boss 22 on the front end of the conductive plate 20 and is electrically connected.
[0041] The front end of the insulating fixing plate 10 is provided with a protective plate 12 sleeved on the front end of the stator core 30. The inner side of the front end of the protective plate 12 is provided with a rearward dovetail insert 13. The front end of the stator core 30 is provided with a slot 31 for the dovetail insert 13 to be inserted. The front end of the insulating fixing plate 10 is abutted against the front end of the stator core 30 and the inner side of the dovetail insert 13 is inserted into the slot 31 for fixation.
[0042] The insulating fixing plate 10 has a tab 15 on each of its two rear ends facing backwards. The stator core 30 has a fixing hole 33 on the outer edge of its rear end corresponding to the insertion of the two tabs 15. The rear end of the insulating fixing plate 10 is fixed by inserting the two tabs 15 on both sides into the fixing hole 33.
[0043] In this embodiment, the rear end of the insulating fixing plate 10 is designed with two inserts 15 on both sides facing backward to insert into the fixing holes 33. Together with the fixing at the front end of the insulating fixing plate 10, the insulating fixing plate 10 can be effectively fixed to the outside of the stator core 30, providing a stable installation for the conductor plate 20.
[0044] In addition, this patent also provides an electric motor, including a housing, a stator assembly fixedly disposed within the housing, and a rotor assembly rotatably disposed between a front cover and a rear cover and located at the center of the stator assembly, wherein the front cover and the rear cover are electrically connected through the motor conduction structure described in any of the above claims.
[0045] The above description is merely illustrative of the embodiments of this utility model and is not intended to limit the scope of this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model without creative labor should be included within the protection scope of this utility model.
Claims
1. A motor conduction structure, comprising an insulating fixing plate (10) and a conduction plate (20), wherein the front and rear ends of the insulating fixing plate (10) are respectively fixed to the front and rear ends of the stator core (30) of the motor, and the conduction plate (20) is fixedly disposed on the outside of the insulating fixing plate (10) and its two ends are electrically connected to the front end cover (50) and the rear end cover (60) on the front and rear sides of the outer casing (40), characterized in that: The conductive plate (20) is provided with at least two slots (21) that penetrate the conductive plate (20). The outer side of the insulating fixing plate (10) is provided with buckles (11) that are inserted into the slots (21) for fixing. The conductive plate (20) is positioned and fixed by inserting the at least two buckles (11) on the outer side of the insulating fixing plate (10) into the corresponding slots (21).
2. The motor conduction structure according to claim 1, characterized in that: The rear end cover (60) is provided with a connection hole (61) on the outside. The rear end of the conductive plate (20) is directly fixed in the connection hole (61) of the rear end cover (60) and electrically connected to the rear end cover (60). The front end of the conductive plate (20) is provided with an outwardly protruding conductive boss (22). The front end mounting step (41) of the outer shell (40) is provided with a through hole (42) corresponding to the conductive boss (22). When the front end cover (50) is fastened to the mounting step (41), the inner ring tightly abuts against the conductive boss (22) and electrically connects.
3. The motor conduction structure according to claim 1 or 2, characterized in that: The front end of the insulating fixing plate (10) is provided with a protective plate (12) sleeved on the front end of the stator core (30). The inner side of the front end of the protective plate (12) is provided with a rearward-facing dovetail insert (13). The front end of the stator core (30) is provided with a slot (31) for the dovetail insert (13) to be inserted. The protective plate (12) at the front end of the insulating fixing plate (10) abuts against the front end of the stator core (30) and the dovetail insert (13) is inserted into the slot (31) for fixation.
4. The motor conduction structure according to claim 1, 2, or 3, characterized in that: The insulating fixing plate (10) has a locking protrusion (14) on each side of its rear end. The stator core (30) has a limiting groove (32) on its rear end that corresponds to the two locking protrusions (14). The rear end of the insulating fixing plate (10) is fixed by the two locking protrusions (14) on both sides being locked into the limiting groove (32).
5. The motor conduction structure according to claim 1, 2, or 3, characterized in that: The insulating fixing plate (10) has a insert (15) on each of its rear ends facing backwards. The stator core (30) has a fixing hole (33) on the outer edge of its rear end corresponding to the two inserts (15). The rear end of the insulating fixing plate (10) is fixed by inserting the two inserts (15) on both sides facing backwards into the fixing hole (33).
6. An electric motor, comprising a housing, a stator assembly fixedly disposed within the housing, and a rotor assembly rotatably disposed between a front end cover and a rear end cover and located at the center of the stator assembly, characterized in that: The front cover and the rear cover are electrically connected by the motor conduction structure described in any one of claims 1 to 5.