Modular electric machine

Abstract

This utility model relates to the field of motor technology, specifically to a modular motor, which includes a first housing; a second housing detachably connected to the outer periphery of the first housing, the first and second housings together forming an annular receiving cavity; a stator fixedly connected to the outer contour of the first housing and located within the receiving cavity; a rotor rotatably disposed radially on the outer side of the stator assembly and electromagnetically coupled to the stator; and a cage rotatably connected to the bottom of the first housing, with the rotor fixed to the top edge of the cage. This application improves the ease of disassembling the motor housing. When an internal fault occurs in the motor, maintenance personnel can easily disassemble the second housing to directly observe and handle the faulty part without the need for overall disassembly or destructive removal of the housing, saving manpower and time costs, shortening the maintenance cycle, reducing secondary damage to other intact components, reducing maintenance difficulty and cost, and improving the reliability and service life of the motor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a modular motor. Background Technology

[0002] Traditional motor housing designs typically employ a one-piece, enclosed structure, providing a relatively stable and reliable protective environment for the motor's core components. Critical components such as the stator and rotor are completely encapsulated within this non-removable housing. However, with the increasing frequency of motor use, its shortcomings in maintenance and repair are becoming increasingly apparent.

[0003] Because the casing is not removable, when internal faults occur in the motor, such as increased abnormal noise and vibration due to bearing wear, abnormal motor heating caused by winding short circuits, or unstable operation due to rotor dynamic imbalance, maintenance personnel cannot directly observe and handle the faulty parts. Often, the only solution is to completely disassemble the motor, or even resort to the extreme measure of destructively removing the casing to access the internal faulty components for repair. This process not only consumes significant manpower and time, greatly extending the maintenance cycle and affecting the normal operation of the equipment and production efficiency, but also, due to limited operating space and difficulty in ensuring component assembly precision during disassembly and reassembly, it is highly likely to cause secondary damage to other intact parts of the motor, further increasing the difficulty and cost of maintenance, and restricting the improvement of the motor's reliability and service life. Utility Model Content

[0004] The purpose of this invention is to provide a modular motor to solve the problem that integrated motors are difficult to disassemble in the prior art.

[0005] The technical solution of this utility model is: a modular motor, comprising: a first housing; a second housing, detachably connected to the outer periphery of the first housing, the first housing and the second housing together forming an annular receiving cavity; a stator, fixedly connected to the outer contour of the first housing and located within the receiving cavity; a rotor, rotatably disposed on the radially outer side of the stator assembly and electromagnetically coupled to the stator; and a cage, rotatably connected to the bottom of the first housing, the rotor being fixed to the top edge of the cage.

[0006] Preferably, the first housing has a first through hole, and the retainer is coaxially fixed with a rotating shaft, which is rotatably connected to the first through hole.

[0007] Preferably, the rotating shaft is detachably connected to a limiting member, the diameter of which is larger than the diameter of the rotating shaft, and the limiting member is constrained by the first housing in the axial direction.

[0008] Preferably, the first housing has a first bearing hole and a second bearing hole that are connected in a stepped manner. The second bearing hole, the first bearing hole and the first through hole are coaxially connected in a stepped manner. A first bearing is provided in the first bearing hole. The rotating shaft is rotatably connected to the first housing through the first bearing. The limiting member is located in the second bearing hole.

[0009] Preferably, a fourth bearing hole is provided at the end of the first through hole opposite to the first bearing hole, and the fourth bearing hole is provided with a second bearing. The rotating shaft is rotatably connected to the first housing through the first bearing and the second bearing.

[0010] Preferably, the second housing includes an upper housing and a lower housing. The upper housing is detachably connected to the first housing via a seal. The upper housing and the lower housing are threaded together. The lower housing, the upper housing, and the first housing form an annular receiving cavity. The stator and the rotor are both located between the lower housing and the first housing.

[0011] Preferably, the first housing has a third bearing hole that communicates with the second bearing hole, and the diameters of the first bearing hole, the second bearing hole and the third bearing hole increase in a stepwise manner. A control plate is provided inside the third bearing hole.

[0012] Preferably, the rotor is a silicon steel sheet, and multiple silicon steel sheets are circularly and fixed to the top end face of the cage.

[0013] Preferably, the edge of the cage smoothly transitions to the edge of the second housing.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] This improves the ease of disassembling the motor housing. When an internal fault occurs in the motor, maintenance personnel can easily disassemble the second housing to directly observe and handle the faulty part without having to disassemble the entire housing or destructively remove it. This saves manpower and time costs, shortens the maintenance cycle, reduces secondary damage to other intact components, lowers maintenance difficulty and cost, and helps improve the reliability and service life of the motor. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a schematic diagram of the structure of a modular motor according to the present invention;

[0018] Figure 2 This is a cross-sectional view of a modular motor according to the present invention.

[0019] Figure 3 This is a cross-sectional view of the first and second housings described in this utility model.

[0020] Figure 4 This is a schematic diagram of the assembly structure of the stator and cage described in this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. First housing; 11. First through hole; 12. First bearing hole; 13. Second bearing hole; 14. Third bearing hole; 15. Fourth bearing hole; 16. First bearing; 17. Second bearing; 2. Second housing; 21. Upper housing; 211. Base part; 212. First extension part; 213. Second extension part; 22. Lower housing; 3. Receiving cavity; 4. Stator; 5. Rotor; 51. Silicon steel sheet; 6. Seal; 7. Rotating shaft; 8. Cage; 9. Limiting part; 10. Control board. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] like Figure 1 and Figure 2As shown, a modular motor includes a first housing 1 and a second housing 2. The second housing 2 is detachably connected to the outer periphery of the first housing 1. The first housing 1 and the second housing 2 together form an annular receiving cavity 3. A stator 4 and a rotor 5 are housed within the receiving cavity 3. The stator 4 is fixedly connected to the outer contour of the first housing 1. Preferably, the stator 4 is keyed to the first housing 1, and the rotor 5 is rotatably disposed on the radially outer side of the stator 4 assembly. The first housing 1 serves as the core load-bearing component that fixes the stator 4, while the second housing 2 serves as a detachable outer cover, enabling rapid maintenance and efficient integration of the entire motor. Its modular structure allows for the inspection or replacement of external components such as the rotor 5 without disassembling internal components, significantly reducing maintenance costs. Simultaneously, the modular housing reduces overall weight and manufacturing complexity.

[0027] A sealing element 6 is provided between the first housing 1 and the second housing 2. Preferably, the outer contour of the first housing 1 is cylindrical, and correspondingly, the sealing element 6 is an annular. More preferably, the cross-section of the sealing element 6 is rectangular. The inner wall of the sealing element 6 fits against the outer contour of the first housing 1, and the outer wall of the sealing element 6 fits against the inner wall of the second housing 2. Preferably, both the first housing 1 and the second housing 2 have a radial interference fit with the sealing element 6.

[0028] The second housing 2 has an annular structure and includes an upper housing 21 and a lower housing 22. The upper housing 21 includes a base portion 211, a first extension portion 212, and a second extension portion 213. The base portion 211 has a recessed limiting groove that mates with the sealing member 6. Preferably, the limiting groove is an annular groove with right-angled sides, meaning that the top and outer periphery of the sealing member 6 are both in contact with the base portion 211. In this embodiment, a gap is left between the inner ring of the base portion 211 and the first housing 1 to facilitate the installation of the first housing 1 and the second housing 2. In other embodiments, the base portion 211 and the first housing 1 are interference-fitted.

[0029] The first extension portion 212 is fixed to the outer periphery of the base portion 211, and the second extension portion 213 is fixed to the bottom surface of the base portion 211. The first extension portion 212 and the second extension portion 213 are arranged perpendicularly to each other to form a positioning structure. The lower housing 22 is constrained by the positioning structure, and the first extension portion 212 and the lower housing 22 are connected by bolts. Preferably, the lower housing 22 is a thin-walled columnar structure. The upper housing 21 and the lower housing 22 form a modular assembly, realizing rapid and accurate positioning and installation. Preferably, the outer contour of the lower housing 22 and the outer contour of the first extension portion 212 transition smoothly.

[0030] The lower housing 22, the upper housing 21, and the first housing 1 form an annular receiving cavity 3. The outer contour of the first housing 1 is stepped. Specifically, the outer contour of the first housing 1 tapers in a stepped manner away from the first upper housing 21. The top of the stator 4 abuts against the stepped structure to position the stator 4 axially.

[0031] like Figure 2 and Figure 3 As shown, the first housing 1 has a first through hole 11 along its axial direction. A rotating shaft 7 is rotatably connected inside the first through hole 11. The top of the first through hole 11 is connected to a plurality of stepped blind holes, the diameter of each blind hole changing progressively along the axial direction. Preferably, the top of the first through hole 11 is sequentially connected to a first bearing hole 12, a second bearing hole 13, and a third bearing hole 14, the diameters of the first bearing hole 12, the second bearing hole 13, and the third bearing hole 14 increasing sequentially, and the rotational axes of the three are coaxial.

[0032] A first bearing 16 is provided inside the first bearing hole 12. The outer contour of the first bearing 16 is interference-fitted with the inner wall of the first bearing hole 12. The rotating shaft 7 rotates relative to the first housing 1 through the first bearing 16. A limiting member 9 is detachably connected to the top of the rotating shaft 7. Preferably, the limiting member 9 is threadedly connected to the rotating shaft 7 by bolts. The limiting member 9 is located in the space of the second bearing hole 13. The outer diameter of the limiting member 9 is larger than the outer diameter of the rotating shaft 7 to prevent the rotating shaft 7 from disengaging from the first through hole 11.

[0033] A control plate 10 is fixedly installed inside the third bearing hole 14. In this embodiment, the control plate 10 is an STM32 microcontroller used to adjust the winding current and achieve precise control of speed, position, or torque through PID algorithms. Since the size of the control plate 10 is larger than that of the limiting member 9, and the size of the limiting member 9 is larger than that of the first bearing 16, the control plate 10, the limiting member 9, and the first bearing 16 are stacked sequentially within the stepped first housing 1. Through the stepped structure with matching dimensions, the axial space of the housing is fully utilized, avoiding the waste of area in the planar arrangement.

[0034] A fourth bearing hole 15 is formed at the end of the first through hole 11 opposite to the first bearing hole 12. The fourth bearing hole 15 is coaxially arranged with the first bearing hole 12. A second bearing 17 is provided in the fourth bearing hole 15. The outer ring of the second bearing 17 is interference-fitted with the inner wall of the fourth bearing hole 15, and the inner ring of the second bearing 17 is in contact with the outer wall of the rotating shaft 7. The first bearing 16 bears the main radial force of the rotating shaft 7 and prevents the rotating shaft 7 from radially shifting. The second bearing 17 and the first bearing 16 form a two-point support, reducing the stress concentration of a single bearing. Through the constraint of the double bearing, the lateral vibration of the rotating shaft 7 during rotation is reduced.

[0035] like Figure 4As shown, a retainer 8 is fixedly connected to one end of the rotating shaft 7. Specifically, the end of the rotating shaft 7 away from the limiting member 9 extends out of the second bearing 17 and is fixedly connected to the rotation center of the retainer 8. The rotating shaft 7 and the retainer 8 rotate synchronously. The retainer 8 has a disc structure, and the edge of the retainer 8 smoothly transitions to the edge of the second housing 2. The rotor 5 is fixedly connected to the upper end face of the retainer 8. In this embodiment, the rotor 5 is a silicon steel sheet 51. Multiple silicon steel sheets 51 are arranged in a circular ring and fixed on the retainer 8. Preferably, the silicon steel sheets 51 are assembled to the preset positioning boss of the retainer 8 by bolting to form an axial magnetic circuit closed loop.

[0036] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A modular motor, characterized in that, include: First shell (1); The second housing (2) is detachably connected to the outer periphery of the first housing (1), and the first housing (1) and the second housing (2) together form an annular receiving cavity (3). The stator (4) is fixedly connected to the outer contour of the first housing (1) and located inside the receiving cavity (3); The rotor (5) is rotatably disposed on the radial outer side of the stator (4) assembly and is electromagnetically coupled to the stator (4); The cage (8) is rotatably connected to the bottom of the first housing (1), and the rotor (5) is fixed to the top edge of the cage (8).

2. A modular motor according to claim 1, characterized in that: The first housing (1) has a first through hole (11), and the retainer (8) is coaxially fixed with a rotating shaft (7), which is rotatably connected to the first through hole (11).

3. A modular motor according to claim 2, characterized in that: The rotating shaft (7) is detachably connected to a limiting member (9), the diameter of which is larger than the diameter of the rotating shaft (7), and the limiting member (9) is constrained by the first housing (1) in the axial direction.

4. A modular motor according to claim 3, characterized in that: The first housing (1) has a first bearing hole (12) and a second bearing hole (13) connected in a stepped manner. The second bearing hole (13), the first bearing hole (12) and the first through hole (11) are connected coaxially in a stepped manner. A first bearing (16) is provided in the first bearing hole (12). The rotating shaft (7) is rotatably connected to the first housing (1) through the first bearing (16). The limiting member (9) is located in the second bearing hole (13).

5. A modular motor according to claim 4, characterized in that: The first through hole (11) has a fourth bearing hole (15) coaxially connected to the first bearing hole (12) at one end away from the first bearing hole (12). The fourth bearing hole (15) is provided with a second bearing (17). The rotating shaft (7) is rotatably connected to the first housing (1) through the first bearing (16) and the second bearing (17).

6. A modular motor according to claim 1, characterized in that: The second housing (2) includes an upper housing (21) and a lower housing (22). The upper housing (21) is detachably connected to the first housing (1) by a seal (6). The upper housing (21) and the lower housing (22) are threaded together. The lower housing (22), the upper housing (21) and the first housing (1) form an annular receiving cavity (3). The stator (4) and the rotor (5) are both located between the lower housing (22) and the first housing (1).

7. A modular motor according to claim 5, characterized in that: The first housing (1) has a third bearing hole (14) that communicates with the second bearing hole (13). The diameters of the first bearing hole (12), the second bearing hole (13) and the third bearing hole (14) increase in a stepwise manner. A control plate (10) is provided in the third bearing hole (14).

8. A modular motor according to claim 1, characterized in that: The rotor (5) is a silicon steel sheet (51), and multiple silicon steel sheets (51) are arranged in a circular pattern and fixed to the top end face of the retainer (8).

9. A modular motor according to claim 1, characterized in that: The edge of the retainer (8) smoothly transitions to the edge of the second housing (2).

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