A limited angle motor stator potting structure and method

Abstract

The present application belongs to the technical field of mechanical connection and cementing of permanent magnet brushless motor, and discloses a limited rotation angle motor stator potting structure, which comprises a stator shell, winding coils, a core positioning block, a stator core, a cylindrical pin, a lead-out wire and a potting glue base. The stator core is coaxially fitted and embedded in the core positioning block, the winding coils are uniformly wound around the stator core, the stator winding assembly is coaxially installed in the stator shell through the core positioning block, the lead-out wire is welded and fixed together with the winding coils, the other end of the lead-out wire extends to the non-potting surface of the stator shell and leads out, and the potting glue base can be tightly and detachably coaxially arranged in the middle and lower part of the stator shell. The present application adopts the process measures of first welding the lead-out wire and then potting the epoxy glue, thereby enhancing the welding strength of the stator lead-out wire, improving the strength of the lead-out wire, preventing the lead-out wire from falling off during use, improving the structural reliability of the motor, and bringing convenience to use.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of mechanical connection and cementing of permanent magnet brushless motor, and particularly relates to a limited angle motor stator potting structure and method. BACKGROUND

[0002] The motor stator is an important component of the motor, which bears the function of placing and fixing the winding coil and plays the role of forming the excitation source for the rotating magnetic field. Although the current stator potting method and process have been effectively improved, the winding coil and the stator core are currently first subjected to the potting operation, and then the welding operation of the winding coil and the lead-out wire is performed after the potting. However, due to the limited structure space, the space reserved for the lead-out wire during the welding after the potting is small, which easily causes the lead-out wire to be not firmly welded, and the lead-out wire is prone to falling off during use, which brings inconvenience to use and increases the production cost.

[0003] Therefore, one or more new structures or methods are needed. SUMMARY

[0004] The application aims to overcome the deficiencies in the prior art and provide a limited angle motor stator potting structure and method.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the application is as follows:

[0006] A limited angle motor stator potting structure, which comprises a stator shell, a winding coil, a core positioning block, a stator core, a cylindrical pin, a lead-out wire and a potting glue base, the stator shell is arranged along the horizontal direction, the top of the stator shell is provided as a potting surface, and the bottom of the stator shell is provided as a non-potting surface;

[0007] The stator core is coaxially fitted and installed in the core positioning block, the winding coil is uniformly wound and arranged around the stator core, and the stator core, the core positioning block and the winding coil jointly constitute a motor stator winding assembly;

[0008] The stator winding assembly is coaxially installed in the stator shell through the core positioning block, the cylindrical pin is threadedly engaged and installed on the stator shell, a cylindrical pin threaded connection through hole is correspondingly formed on the core positioning block directly below the cylindrical pin, and the core positioning block is detachably connected and arranged with the stator shell through the cylindrical pin, the cylindrical pin threaded connection through hole;

[0009] One end of the lead-out wire is welded and fixed together with the winding coil of the stator winding assembly, and the other end of the lead-out wire extends to the non-potting surface of the stator shell and is led out;

[0010] The potting glue base is arranged along the horizontal direction and can be closely and detachably arranged coaxially in the middle and lower part of the stator shell, the lead-out wire penetrating hole is coaxially arranged on the potting glue base, and the other end of the lead-out wire can be movably penetrated through the lead-out wire penetrating hole.

[0011] A plurality of glue pouring holes are uniformly and spacedly arranged on the stator shell above the core positioning block in the circumferential direction, the glue pouring holes are arranged along the vertical direction and extend downward from the glue pouring surface of the stator shell to the lower bottom surface of the stator shell above the core positioning block.

[0012] Further, the material of the stator shell and the cylindrical pin is aluminum metal material, the material of the stator core is soft magnetic alloy material, and the material of the core positioning block is polysulfone material.

[0013] Further, the material of the potting glue base is polytetrafluoroethylene material.

[0014] Further, the potting glue base further comprises a base body and a mounting cavity, the base body is arranged along the horizontal direction and arranged coaxially with the stator shell, the lead-out wire penetrating hole is coaxially arranged on the base body, the mounting cavity is coaxially arranged in the base body, the stator shell can be detachably placed in the mounting cavity, the inner wall of the base body in the mounting cavity is provided with an engagement inner thread, and the middle and lower part of the outer surface of the stator shell is provided with an engagement outer thread.

[0015] The use method of the limited rotation angle motor stator potting structure as described above comprises the following steps:

[0016] The potting glue base is installed and arranged at the bottom of the stator shell, the lead-out wire is penetrated out of the lead-out wire penetrating hole of the potting glue base, the stator shell and the stator winding assembly are placed on the potting glue base and coaxially connected with the potting glue base;

[0017] The configured epoxy resin glue is slowly and uniformly poured into the stator winding assembly along the glue pouring hole of the stator shell, the epoxy resin glue enters the stator winding assembly through the cylindrical pin threaded connection through hole, then vacuumizing treatment is performed, after the bubbles are exhausted, the stator winding assembly is placed in a high temperature oven for baking for 8h, the temperature is set to 100 DEG C, and the furnace is cooled. After the stator winding assembly is formed, the potting glue base is removed.

[0018] The advantages and effects obtained by the present application are:

[0019] 1. In use, the prepared epoxy resin is slowly and evenly poured into the stator winding assembly through the potting holes in the stator housing. The epoxy resin enters the stator winding assembly through the threaded connection holes of the cylindrical pins. Then, a vacuum process is performed (the vacuum equipment can be set to a reasonable vacuum level and time according to actual needs). After the air bubbles are removed, it is placed in a high-temperature oven and baked for 8 hours at 100°C, then cooled in the oven. After the stator winding assembly is formed, the potting resin base can be removed. This invention employs a process of first "welding the leads" and then "potting with epoxy resin," which enhances the welding strength of the stator leads, improves the strength of the leads, reduces the likelihood of leads falling off during use, improves the structural reliability of the motor, and brings convenience to its use.

[0020] Furthermore, the potting structure of this invention encapsulates the entire stator through the potting holes in the stator housing. During the potting process, the potting adhesive base is in close contact with the end face of the stator housing, enabling control over the flatness of the potted adhesive surface.

[0021] 2. After the stator is potted, the glued end face of the lead wire side can be directly flush with the end face of the stator housing, avoiding the adverse effect of the machined housing end face on the welding strength of the lead wire.

[0022] 3. In this invention, the stator housing and cylindrical pins are made of aluminum, the stator core is made of a soft magnetic alloy, and the core positioning block is made of polysulfone. Because these materials have a linear expansion coefficient closer to that of epoxy resin, they exhibit better reliability and environmental adaptability in high and low temperature environments after being molded into a stator.

[0023] 4. The potting adhesive base of the present invention is made of polytetrafluoroethylene material, which protects the lead wires before potting; after the stator is potted and molded, it is easy to detach from the stator and easy to operate. Attached Figure Description

[0024] Figure 1 This is a front sectional view of a structural connection of the potting structure in this invention;

[0025] Figure 2 In this invention Figure 1 A top-down view. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to specific embodiments. The following embodiments are merely descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.

[0027] The raw materials used in the present application are all conventional commercially available products, unless otherwise specified. The methods used in the present application are all conventional methods in the art, unless otherwise specified. The quality of each substance used in the present application is conventional quality used. The structures and connection relationships not described in detail in the present application can be understood as conventional technical means in the art.

[0028] A limited rotation angle motor stator potting structure, as shown in Figure 1 and Figure 2 , the potting structure comprises a stator shell 1, a winding coil 2, a core positioning block 3, a stator core 4, a cylindrical pin 5, a lead-out wire 6 and a potting glue base 8, the stator shell is arranged in the horizontal direction, the top of the stator shell is provided as a glue pouring surface 9, and the bottom of the stator shell is provided as a non-glue pouring surface 11.

[0029] The stator core is coaxially fitted and installed in the core positioning block, the winding coil is uniformly wound around the stator core, and the stator core, the core positioning block and the winding coil jointly constitute a motor stator winding assembly.

[0030] The stator winding assembly is coaxially installed in the stator shell through the core positioning block, the cylindrical pin 5 is threadedly engaged and installed on the stator shell, a cylindrical pin threaded connection hole (not shown in the figure) is correspondingly formed on the core positioning block directly below the cylindrical pin, and the core positioning block is detachably connected and arranged with the stator shell through the cylindrical pin and the cylindrical pin threaded connection hole. The stator winding assembly and the core positioning block are axially fixed and connected with the stator shell through the cylindrical pin, which improves the structural connection stability and ensures the use effect.

[0031] One end of the lead-out wire is welded and fixed together with the winding coil of the stator winding assembly, thereby fixing the position of the winding coil, and at the same time, after potting, the lead-out wire core can be completely and effectively packaged in the potting glue, thereby increasing the strength of the lead-out wire. The other end of the lead-out wire extends to the non-glue pouring surface of the stator shell and is led out; this structure completely wraps the lead-out wire core inside the stator shell, can keep a sufficient safety distance between the lead-out wire and the end surface of the stator shell, and can ensure a high lead-out wire strength;

[0032] The potting glue base is arranged in the horizontal direction and can be tightly and detachably coaxially arranged in the middle and lower part of the stator shell, a lead-out wire passing hole is coaxially formed on the potting glue base, and the other end of the lead-out wire can be movably passed through the lead-out wire passing hole 10, thereby facilitating the passing of the lead-out wire; the potting glue base can ensure that the lead-out wire side glue surface is flush with the end surface of the stator shell, thereby reducing the influence of machining on the strength of the lead-out wire;

[0033] A plurality of glue pouring holes 12 are uniformly distributed and spaced apart in the circumferential direction on the stator shell directly above the iron core positioning block, the glue pouring holes are arranged in the vertical direction and extend downward from the glue pouring surface of the stator shell to the lower bottom surface of the stator shell above the iron core positioning block. The arrangement of the glue pouring holes facilitates slow and uniform pouring of the configured epoxy resin glue (not shown in the figure) into the stator winding assembly through the glue pouring holes on the stator shell, and the epoxy resin glue is uniformly poured into the stator winding assembly through the glue pouring holes to realize epoxy resin potting of the stator winding assembly and packaging of all parts of the stator.

[0034] In use, the configured epoxy resin glue is slowly and uniformly poured into the stator winding assembly through the glue pouring holes of the stator shell, the epoxy resin glue enters the stator winding assembly through the cylindrical pin threaded connection hole, then vacuumizing treatment is performed (the vacuumizing equipment can set reasonable vacuum degree and vacuumizing time according to actual needs), after the bubbles are drained, the epoxy resin glue is placed in a high-temperature oven for baking for 8h, the temperature is set to 100 DEG C, and the oven is cooled. After the stator winding assembly is formed, the potting glue base is removed.

[0035] In addition, the potting structure of the present application realizes packaging of the entire stator through the glue pouring holes of the stator shell. In the potting process, the potting glue base is tightly attached to the end surface of the stator shell, and the flatness of the glued surface after potting is controlled.

[0036] In the embodiment, the material of the stator shell and the cylindrical pin is aluminum metal material, the material of the stator core is soft magnetic alloy material, and the material of the iron core positioning block is polysulfone material. Since the linear expansion coefficients of these materials and the epoxy resin glue are more close, the stator formed by potting exhibits better reliability and environmental adaptability in high and low temperature environments.

[0037] In the embodiment, the material of the potting glue base is polytetrafluoroethylene material, which has the effect of protecting the lead-out wire before potting, and is easy to operate after the stator is formed by potting.

[0038] In the embodiment, the potting base further comprises a base body (not numbered in the figure) and a mounting cavity 13, the base body is arranged in a horizontal direction and coaxially arranged with the stator shell, the lead-out wire coaxially arranged on the base body through the hole, the mounting cavity is coaxially arranged in the base body, the stator shell can be detachably placed in the mounting cavity, the inner wall of the base body in the mounting cavity is provided with an engagement inner thread, and the outer surface of the middle and lower part of the stator shell is provided with an engagement outer thread. The engagement outer thread and the engagement inner thread are arranged in cooperation, and the stator shell is detachably connected with the base body through the engagement outer thread and the engagement inner thread. The arrangement of the engagement outer thread and the engagement inner thread of the structure makes the connection and installation of the stator shell and the base body more convenient and firm, and greatly facilitates the use.

[0039] The use method of the limited rotation angle motor stator potting structure comprises the following steps:

[0040] The potting base is mounted and arranged at the bottom of the stator shell, the lead-out wire is ensured to pass out from the lead-out wire passing hole of the potting base, the stator shell and the stator winding assembly are placed on the potting base in cooperation and connection (more preferably, the placement can be ensured in place by relying on the stop), and the stator shell and the stator winding assembly are placed on the potting base in cooperation and connection (more preferably, the placement can be ensured in place by relying on the stop).

[0041] The configured epoxy resin glue is slowly and uniformly poured into the stator winding assembly along the glue pouring hole of the stator shell, the epoxy resin glue enters the stator winding assembly through the cylindrical pin threaded connection through hole, then vacuumizing treatment is carried out (the vacuumizing equipment can set reasonable vacuum degree and vacuumizing time according to actual needs), after the bubbles are exhausted, the stator winding assembly is placed in a high temperature oven for baking for 8h, the temperature is set to 100 DEG C, and the oven is cooled. After the stator winding assembly is formed, the potting base is removed.

[0042] Although the embodiments of the present application are disclosed for the purpose of illustration, those skilled in the art can understand that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present application and the appended claims, therefore, the scope of the present application is not limited to the disclosed content of the embodiments.

Claims

1. A limited rotation motor stator potting structure, characterized in that: The potting structure comprises a stator shell, winding coils, a core positioning block, a stator core, a cylindrical pin, a lead wire and a potting glue base, the stator shell is arranged along the horizontal direction, the top of the stator shell is provided as a glue pouring surface, and the bottom of the stator shell is provided as a non-glue pouring surface; The stator core is coaxially fitted and installed in the core positioning block, the winding coils are uniformly wound around the stator core, and the stator core, the core positioning block and the winding coils jointly constitute a stator winding assembly of the motor. The stator winding assembly is coaxially installed in the stator shell through the core positioning block, the cylindrical pin is threadedly engaged and installed on the stator shell, a cylindrical pin threaded connection hole is correspondingly formed in the core positioning block directly below the cylindrical pin, and the core positioning block is detachably connected with the stator shell through the cylindrical pin and the cylindrical pin threaded connection hole. One end of the lead wire is welded and fixed with the winding coils of the stator winding assembly, and the other end of the lead wire extends to and leads out of the non-glue pouring surface of the stator shell. The potting glue base is arranged along the horizontal direction and can be closely and detachably coaxially arranged at the middle and lower part of the stator shell, a lead wire passing hole is coaxially formed on the potting glue base, and the other end of the lead wire can movably pass through the lead wire passing hole. A plurality of glue pouring holes are uniformly and spacedly formed on the stator shell directly above the core positioning block along the circumferential direction, the glue pouring holes are arranged along the vertical direction and extend downward from the glue pouring surface of the stator shell to the lower bottom surface of the stator shell directly above the core positioning block.

2. The limited rotation motor stator potting structure of claim 1, wherein: The materials of the stator shell and the cylindrical pin are both aluminum metal materials, the material of the stator core is soft magnetic alloy material, and the material of the core positioning block is polysulfone material.

3. The limited rotation motor stator potting structure of claim 1, wherein: The material of the potting glue base is polytetrafluoroethylene material.

4. The limited angle motor stator potting structure according to any one of claims 1 to 3, characterized in that: The potting glue base further comprises a base body and a mounting cavity, the base body is arranged along the horizontal direction and coaxially arranged with the stator shell, the lead wire passing hole is coaxially arranged on the base body, the mounting cavity is coaxially formed in the base body, the stator shell can be detachably placed in the mounting cavity, an engagement inner thread is formed on the inner wall of the base body in the mounting cavity, and an engagement outer thread is formed on the outer surface of the middle and lower part of the stator shell.

5. A method of using a limited angle motor stator potting structure according to any one of claims 1 to 4, wherein: The method comprises the following steps: The potting glue base is arranged on the bottom of the stator shell, the lead wire is made to pass through the lead wire passing hole of the potting glue base, and the stator shell and the stator winding assembly are placed on the potting glue base and coaxially connected therewith; The prepared epoxy resin glue is slowly and uniformly poured into the stator winding assembly along the glue pouring holes of the stator shell, the epoxy resin glue enters the stator winding assembly through the cylindrical pin threaded connection hole, then vacuumizing treatment is performed, after the bubbles are exhausted, the stator winding assembly is placed in a high-temperature oven for baking for 8h, the temperature is set to 100℃, the oven is cooled, after the stator winding assembly is formed, the potting glue base is removed, and the method is completed.

Images