A disc motor

Abstract

The utility model discloses a disc type motor, including stator subassembly and bearing assembly, stator subassembly includes stator core, installs the insulating seat outside stator core to and is around the stator winding of setting outside insulating seat, its stator subassembly still includes end plate and injection molding insulator, end plate is installed below stator core, injection molding insulator combines stator core, insulating seat, stator winding together with end plate, and injection molding insulator central place is equipped with the axial through -hole, and the central place of end plate is equipped with the fixed through -hole that communicates with the axial through -hole, and bearing assembly is installed in the axial through -hole. Through injection molding insulator carries out insulation, can reduce the insulating process of dipping lacquer, improves the efficiency and reduces the cost, through injection molding roll circle, the outer diameter can be reduced properly, and stator subassembly can reach the structure size of smaller, and stator end plate is helpful to heat dissipation.

Description

Technical Field

[0001] This utility model relates to a disc motor. Background Technology

[0002] Existing disc motors include a stator assembly and a stator end cover. The stator assembly is installed inside the stator end cover, which contains a bearing housing. The stator assembly includes a stator core, an insulating base mounted outside the stator core, and stator windings wound around the insulating base. The stator assembly dissipates heat through air. This type of disc motor has the following disadvantages: 1. The heat dissipation coefficient of air cooling (thermal conductivity 0.026W / (m*K)) is low, resulting in low heat dissipation efficiency; 2. The impregnation insulation process of the stator windings is time-consuming; 3. A certain creepage distance is required between the stator outer diameter and the outer metal wall of the stator end cover, resulting in a relatively large outer diameter of the stator assembly. Utility Model Content

[0003] This invention provides a disc motor to solve the problems of low heat dissipation efficiency and large outer diameter of the stator assembly in existing disc motors.

[0004] The technical solution of this utility model is implemented as follows:

[0005] The purpose of this utility model is to provide a disc motor, including a stator assembly and a bearing assembly. The stator assembly includes a stator core, an insulating seat installed outside the stator core, and a stator winding wound around the insulating seat. The stator assembly is characterized by further including an end plate and an injection-molded insulator. The end plate is installed below the stator core. The injection-molded insulator combines the stator core, the insulating seat, the stator winding, and the end plate together. The injection-molded insulator has an axial through hole in its center. The end plate has a fixed through hole in its center that communicates with the axial through hole. The bearing assembly is installed in the axial through hole.

[0006] The aforementioned bearing assembly includes a bearing sleeve, an upper ball bearing, and a lower ball bearing. The bearing sleeve has an upper bearing chamber and a lower bearing chamber at both ends, and the upper ball bearing and the lower ball bearing are respectively installed in the upper bearing chamber and the lower bearing chamber. The bearing sleeve is connected to the end plate.

[0007] The diameter of the aforementioned fixed through hole is smaller than the diameter of the axial through hole. The end plate surrounding the fixed through hole forms an installation platform within the axial through hole. The installation platform is provided with several first fixing holes. The outer side of the bearing sleeve has a protruding edge, which is provided with several second fixing holes corresponding to the first fixing holes. The protruding edge rests on the installation platform, and a screw is installed on the installation platform. The tail of the screw passes through the first fixing hole and the second fixing hole. The bearing assembly is fixed in the axial through hole by the screw.

[0008] The bearing assembly described above also includes a planar bearing. A planar bearing chamber is provided inside the bearing sleeve between the upper bearing chamber and the lower bearing chamber. The planar bearing is installed in the planar bearing chamber and is connected to the inner ring of the upper ball bearing.

[0009] The bearing sleeve described above has an end cap fitted at its bottom, and the inner surface of the end cap has a groove, into which the bottom of the bearing sleeve is inserted.

[0010] The bearing sleeve described above has a groove on the bottom outer wall, and a locking block protrudes outward from the groove wall, which is locked in the groove.

[0011] The end of the aforementioned end plate protrudes from the injection-molded insulating body to form several mounting feet, and the mounting feet are provided with first mounting holes.

[0012] The injection-molded insulator described above has several protruding lugs on its outer side, and the lugs are provided with a second mounting hole.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] 1. The disc motor includes a stator assembly and a bearing assembly. The stator assembly includes a stator core, an insulating base mounted outside the stator core, and stator windings wound around the insulating base. The stator assembly also includes an end plate and an injection-molded insulator. The end plate is mounted below the stator core. The injection-molded insulator combines the stator core, insulating base, stator windings, and end plate together. The injection-molded insulator has an axial through hole in its center, and the end plate has a fixed through hole communicating with the axial through hole in its center. The bearing assembly is installed within the axial through hole. Insulation using the injection-molded insulator reduces the need for impregnation insulation, improving efficiency and reducing costs. By injection molding and rolling, the outer diameter can be appropriately reduced, allowing for a smaller stator assembly structure. The stator end plate aids in heat dissipation. The injection-molded insulator dissipates heat through contact transfer and has a high heat dissipation coefficient and high heat dissipation efficiency.

[0015] 2. Other advantages of this utility model are described in detail in the embodiments section. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a disc motor provided in an embodiment of the present utility model;

[0017] Figure 2 This is a bottom view of a disc motor;

[0018] Figure 3 for Figure 2 AA cross-sectional view;

[0019] Figure 4 This is an exploded view of a disc motor.

[0020] Figure 5This is an exploded view of the bearing assembly in a disc motor.

[0021] Figure 6 This is a cross-sectional view of the bearing sleeve of a disc motor. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] like Figures 1 to 6 As shown, this embodiment provides a disc motor, including a stator assembly 1 and a bearing assembly 2. The stator assembly 1 includes a stator core 11, an insulating seat 12 installed outside the stator core 11, and a stator winding 13 wound around the insulating seat 12. The stator assembly 1 further includes an end plate 14 and an injection-molded insulator 15. The end plate 14 is installed below the stator core 11. The injection-molded insulator 15 combines the stator core 11, the insulating seat 12, the stator winding 13, and the end plate 14. The injection-molded insulator 15 has an axial through hole 151 in the center. The end plate 14 has a fixed through hole 143 in the center that communicates with the axial through hole 151. The bearing assembly 2 is installed in the axial through hole 151.

[0024] The disc motor is insulated by injection-molded insulator 15, which reduces the need for impregnation insulation, improves efficiency, and lowers costs. By injection molding and rolling, the outer diameter can be appropriately reduced, allowing for a smaller stator assembly 1. The end plate 14 facilitates heat dissipation from the stator assembly. The bearing assembly 2 is conveniently installed within the shaft through-hole 151. The injection-molded insulator 15 dissipates heat through contact transfer and has a high heat dissipation coefficient, rapidly transferring the heat generated by the stator core and stator windings 13, resulting in high heat dissipation efficiency.

[0025] The aforementioned bearing assembly 2 includes a bearing sleeve 21, an upper ball bearing 22, and a lower ball bearing 23. The bearing sleeve 21 has an upper bearing chamber 211 and a lower bearing chamber 212 at its two ends, respectively. The upper ball bearing 22 and the lower ball bearing 23 are respectively installed in the upper bearing chamber 211 and the lower bearing chamber 212. The bearing sleeve 21 is connected to the end plate 14. The bearing assembly 2 and the injection-molded insulator 15 are separately configured, allowing for the use of bearing sleeves 21 of different heights as needed. Simultaneously, the bearing sleeve 21 can block the influence of the stator winding 13 temperature on the upper bearing chamber 211 and the lower bearing chamber 212, reducing the bearing chamber temperature. Additional heat dissipation structures can also be added to the bearing assembly 2 to enhance the bearing's heat dissipation capacity.

[0026] The bearing assembly 2 described above also includes a planar bearing 24. A planar bearing chamber 213 is provided inside the bearing sleeve 21 between the upper bearing chamber 211 and the lower bearing chamber 212. The planar bearing 24 is installed in the planar bearing chamber 213 and is connected to the inner ring of the upper ball bearing 22.

[0027] The diameter of the aforementioned fixed through hole 143 is smaller than the diameter of the axial through hole 151. The end plate 14 surrounding the fixed through hole 143 forms a mounting platform 144 within the axial through hole 151. The mounting platform 144 is provided with several first fixing holes 145. The outer side of the bearing sleeve 21 has a protruding edge 214, which is provided with several second fixing holes 215 corresponding to the first fixing holes 145. The protruding edge 214 rests on the mounting platform 144, and a screw 3 is installed on the mounting platform 144. The tail of the screw 3 passes through the first fixing holes 145 and the second fixing holes 215. The bearing assembly 2 is fixed in the axial through hole 151 by the screw 3. The stator assembly 1 and the bearing assembly 2 are easy to fix, and the height deviation of the bearing assembly 2 can be adjusted by adding shims between the protruding edge 214 and the mounting platform 144.

[0028] The bearing sleeve 21 described above has an end cap 25 fitted at its bottom. The inner surface of the end cap 25 is provided with a groove 251, and the bottom of the bearing sleeve 21 is inserted into the groove 251.

[0029] The bearing sleeve 21 described above has a groove 216 on its bottom outer wall, and a locking block 252 protrudes outward from the groove wall of the groove 251, which is engaged in the groove 216. The engagement of the locking block 252 and the groove 216 makes the end cover 25 more securely fixed.

[0030] The end plate 14 described above protrudes from the injection-molded insulator 15 to form a plurality of mounting feet 141, and the mounting feet 141 are provided with first mounting holes 142.

[0031] The injection-molded insulator 15 described above has several protruding lugs 152 on its outer side, and each lug 152 has a second mounting hole 153. The lugs 152 make it easier to install the motor.

[0032] The end plate 14 is made of metal.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A disc motor, comprising a stator assembly (1) and a bearing assembly (2), wherein the stator assembly (1) comprises a stator core (11), an insulating base (12) mounted outside the stator core (11), and a stator winding (13) wound around the insulating base (12), characterized in that: The stator assembly (1) also includes an end plate (14) and an injection-molded insulator (15). The end plate (14) is installed below the stator core (11). The injection-molded insulator (15) combines the stator core (11), the insulation seat (12), the stator winding (13) with the end plate (14). The injection-molded insulator (15) has an axial through hole (151) in the center. The end plate (14) has a fixed through hole (143) in the center that communicates with the axial through hole (151). The bearing assembly (2) is installed in the axial through hole (151).

2. A disc motor according to claim 1, characterized in that: The bearing assembly (2) includes a bearing sleeve (21), an upper ball bearing (22) and a lower ball bearing (23). The bearing sleeve (21) has an upper bearing chamber (211) and a lower bearing chamber (212) at both ends. The upper ball bearing (22) and the lower ball bearing (23) are installed in the upper bearing chamber (211) and the lower bearing chamber (212) respectively. The bearing sleeve (21) is connected to the end plate (14).

3. A disc motor according to claim 2, characterized in that: The diameter of the fixed through hole (143) is smaller than the diameter of the axial through hole (151). The end plate (14) around the fixed through hole (143) forms an installation platform (144) in the axial through hole (151). The installation platform (144) is provided with a plurality of first fixing holes (145). The bearing sleeve (21) has a protruding edge (214) protruding outward on the outer side. The protruding edge (214) is provided with a plurality of second fixing holes (215) corresponding to the first fixing holes (145). The protruding edge (214) rests on the installation platform (144). A screw (3) is installed on the installation platform (144). The tail of the screw (3) passes through the first fixing hole (145) and the second fixing hole (215). The bearing assembly (2) is fixed in the axial through hole (151) by the screw (3).

4. A disc motor according to claim 3, characterized in that: The bearing assembly (2) further includes a planar bearing (24). A planar bearing chamber (213) is provided between the upper bearing chamber (211) and the lower bearing chamber (212) inside the bearing sleeve (21). The planar bearing (24) is installed in the planar bearing chamber (213) and is connected to the inner ring of the upper ball bearing (22).

5. A disc motor according to claim 4, characterized in that: The bottom of the bearing sleeve (21) is fitted with an end cap (25), and the inner surface of the end cap (25) is provided with a groove (251), into which the bottom of the bearing sleeve (21) is inserted.

6. A disc motor according to claim 5, characterized in that: The bearing sleeve (21) has a groove (216) on the bottom outer wall surface, and a locking block (252) protrudes outward from the groove wall of the groove (251), and the locking block (252) is locked in the groove (216).

7. A disc motor according to any one of claims 1 to 6, characterized in that: The end of the end plate (14) protrudes out of the injection-molded insulator (15) to form a plurality of mounting feet (141), and the mounting feet (141) are provided with first mounting holes (142).

8. A disc motor according to claim 7, characterized in that: The injection-molded insulator (15) has several protruding lugs (152) on its outer side, and the lugs (152) are provided with a second mounting hole (153).

9. A disc motor according to any one of claims 1 to 6, characterized in that: The end plate (14) is made of metal.

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