Disc type motor structure

Abstract

The utility model provides a disc type motor structure, which comprises a middle shaft, a stator assembly, a casing and a rotor, the periphery of the middle shaft is rotatably sleeved to the inner ring of the casing, the rotor is arranged in the casing, the stator assembly is fixedly sleeved to the periphery of the middle shaft, the rotor is positioned on one side of the stator, the middle shaft is fixedly mounted at a fixed position, and the casing can rotate relative to the middle shaft through the rotor. When the disc type motor structure is applied, the middle shaft can be arranged on the rack, the casing is fixedly sleeved in the wheel, rotation of the wheel relative to the rack is realized, the rotor iron core is arranged on the end cover, and then relative positions of the rotor iron core, the casing and the stator assembly are fixed through the end cover. Compared with the prior art, the machining error requirement of the stator assembly and the rotor is reduced, if the chamber sweeping problem exists after the motor is assembled, the relative position of the stator and the rotor can be adjusted by adjusting the relative position of the end cover and the machine shell under the condition that the motor is not disassembled, later disassembly, assembly and maintenance are facilitated, the structure is simple, and implementation is easy.

Description

Technical Field

[0001] The utility model belongs to the field of disc motors, and particularly relates to a disc motor structure. Background Art

[0002] Axial permanent magnet motors, also known as disc motors, have received increasing attention due to their advantages such as compact structure, high efficiency, and high power density. Disc permanent magnet motors are particularly suitable for applications that require high torque density and compact space, such as electric vehicles, renewable energy systems, gear energy storage systems, and industrial equipment.

[0003] Due to the short iron core, large outer diameter of the iron core part, and small air gap of the outer rotor structure of the existing disc motors, the processing technology has always been quite demanding, and it is difficult to disassemble and assemble. It is difficult to repair the stator and rotor rubbing due to processing errors. Summary of the Utility Model

[0004] In view of this, the utility model aims to provide a disc motor structure to solve the problems of small air gap and difficult repair of rotor rubbing in the existing disc motors.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A disc motor structure includes a central shaft, a stator assembly, a housing, and a rotor. The outer periphery of the central shaft is rotatably sleeved in the inner ring of the housing, and the rotor is arranged inside the housing. The stator assembly is fixedly sleeved on the outer periphery of the central shaft. The rotor is located on one side of the stator. The central shaft is fixedly installed at a fixed position, and the housing can rotate relative to the central shaft through the rotor.

[0007] Further, the central shaft is a hollow shaft, and a wire passing hole is provided on the side wall of the central shaft. One end of the winding coil of the stator assembly can pass through the wire passing hole and be located inside the inner ring of the central shaft.

[0008] Further, one end cover is provided at each end of the stator assembly, and each end cover is rotatably connected to the outer periphery of the central shaft through a bearing.

[0009] Further, the housing is a hollow cylindrical structure. The stator assembly is located inside the inner ring of the housing, and both ends of the housing are fixedly connected to one side of an end cover respectively.

[0010] Further, one rotor is provided on each end cover. The two rotors are respectively located at both ends of the stator assembly. Each rotor includes a back iron, a permanent magnet, and a fixing block. One end of the back iron abuts against one end of the end cover, and the other end of the back iron abuts against one end of the permanent magnet. The permanent magnet is detachably connected to the end cover through the fixing block.

[0011] Further, one end of the end cover is provided with an annular mounting groove. The inner ring of the annular mounting groove has a sloped groove wall. The permanent magnet includes a plurality of magnetic steel pieces, and the plurality of magnetic steel pieces are arranged circumferentially in the mounting groove. One side of each magnetic steel piece is attached to one end of the back iron. One end of each magnetic steel piece is provided with a slope matching the sloped groove wall, and the slope can fit into the sloped groove wall. The other end of the magnetic steel piece abuts against the outer groove wall of the annular mounting groove through a fixing block.

[0012] Compared with the prior art, the disc motor structure of the present utility model has the following beneficial effects: When in application, the central shaft can be arranged on the frame, the casing is fixedly sleeved inside the wheel to realize the rotation of the wheel relative to the frame, and the rotor core is installed on the end cover. Then, the relative positions with the casing and the stator assembly are fixed through the end cover, reducing the processing error requirements of the stator assembly and the rotor. If there is a problem of stator-rotor rubbing after the motor is assembled, the relative positions of the stator and the rotor can be adjusted by adjusting the relative position between the end cover and the casing without disassembling the machine, which is convenient for later disassembly, installation and maintenance, and has a simple structure and is easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0014] Figure 1 is a schematic structural diagram of a disc motor structure according to an embodiment of the present utility model;

[0015] Figure 2 is a cross-sectional schematic diagram of a disc motor structure according to an embodiment of the present utility model;

[0016] Figure 3 is an exploded structural diagram of a disc motor structure according to an embodiment of the present utility model;

[0017] Figure 4 is a schematic structural diagram of a permanent magnet installed on the end cover according to an embodiment of the present utility model.

[0018] DESCRIPTION OF THE REFERENCE NUMERALS:

[0019] 1 - Central shaft; 11 - Wire passing hole; 2 - Bearing; 3 - End cover; 4 - Casing; 5 - Stator assembly; 6 - Rotor; 61 - Back iron; 62 - Permanent magnet; 621 - Magnetic steel piece; 63 - Fixing block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "plural" is two or more.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0023] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0024] As Figures 1-4 shown, a disc motor structure includes a central shaft 1, a stator assembly 5, a housing 4, and a rotor 6. The outer periphery of the central shaft 1 is rotatably sleeved in the inner ring of the housing 4, and the rotor 6 is arranged inside the housing 4. The stator assembly 5 is fixedly sleeved on the outer periphery of the central shaft 1. The rotor 6 is located on one side of the stator. The central shaft 1 is fixedly installed at a fixed position. The housing 4 can rotate relative to the central shaft 1 through the rotor 6. Two end covers 3 are respectively arranged at both ends of the stator assembly 5, and each end cover 3 is rotatably connected to the outer periphery of the central shaft 1 through a bearing 2. In application, the central shaft 1 can be arranged on a frame, and the housing 4 is fixedly sleeved inside a wheel to realize the rotation of the wheel relative to the frame. And the core of the rotor 6 is installed on the end cover 3, and then the relative positions with the housing 4 and the stator assembly 5 are fixed through the end cover 3, reducing the processing error requirements of the stator assembly 5 and the rotor 6. If there is a problem of rubbing between the stator and the rotor after the motor is assembled, the relative positions of the stator and the rotor 6 can be adjusted by adjusting the relative position between the end cover 3 and the housing 4 without disassembling the machine, which is convenient for later disassembly and maintenance, and has a simple structure and is easy to implement.

[0025] The central shaft 1 is a hollow shaft. A wire passing hole 11 is provided on the side wall of the central shaft 1. One end of the winding coil of the stator assembly 5 can pass through the wire passing hole 11 and be located inside the inner circle of the central shaft 1. When assembling the stator assembly 5, it is necessary to first install the stator core around the central shaft 1, and then wind the coil on the stator core to complete the installation of the stator assembly 5. After passing the coil head of the stator assembly 5 into the middle of the central shaft 1, the assembly of the central shaft 1 and the stator assembly 5 is completed by potting, which can prevent foreign matters from entering the stator assembly 5 and is convenient for threading.

[0026] The housing 4 is a hollow cylindrical structure. The stator assembly 5 is located inside the inner circle of the housing 4. Both ends of the housing 4 are fixedly connected to one side of an end cover 3 respectively. A rotor 6 is provided on each end cover 3. The two rotors 6 are respectively located at both ends of the stator assembly 5. Each rotor 6 includes a back iron 61, a permanent magnet 62 and a fixing block 63. One end of the back iron 61 abuts against one end of the end cover 3, and the other end of the back iron 61 abuts against one end of the permanent magnet 62. The permanent magnet 62 is detachably connected to the end cover 3 through the fixing block 63.

[0027] One end of the end cover 3 is provided with an annular installation groove. The inner circle of the annular installation groove is a sloping groove wall. The permanent magnet 62 includes a number of magnetic steel 621, and the number of magnetic steel 621 are arranged circumferentially in the installation groove. One side of each magnetic steel 621 abuts against one end of the back iron 61. One end of each magnetic steel 621 is provided with a slope surface matching the sloping groove wall. The slope surface can fit into the sloping groove wall. The other end of the magnetic steel 621 abuts against the outer groove wall of the annular installation groove through the fixing block 63. The magnetic steel 621 can be prevented from falling off by fitting the slope surface into the sloping groove wall, and then the relative position of the magnetic steel 621 is positioned by the fixing block 63. This structure can make the magnetic steel 621 stable and reliable without falling off, and the installation is convenient and the process is simple.

[0028] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A disc motor structure, characterized in that: The invention comprises a central shaft (1), a stator assembly (5), a casing (4) and a rotor (6); the outer periphery of the central shaft (1) is rotatably sleeved on the inner ring of the casing (4), and the rotor (6) is arranged in the casing (4); the stator assembly (5) is fixedly sleeved on the outer periphery of the central shaft (1), the rotor (6) is located on one side of the stator, the central shaft (1) is fixedly installed in a fixed position, and the casing (4) can rotate relative to the central shaft (1) through the rotor (6).

2. A disc motor structure according to claim 1, characterized in that: The central shaft (1) is a hollow shaft, and a threading hole (11) is provided on the side wall of the central shaft (1). One end of the winding coil of the stator assembly (5) can pass through the threading hole (11) and then be located in the inner circle of the central shaft (1).

3. A disc motor structure according to claim 1, characterized in that: An end cover (3) is respectively provided at both ends of the stator assembly (5), and each end cover (3) is rotatably connected to the periphery of the central shaft (1) via a bearing (2).

4. A disc motor structure according to claim 3, characterized in that: The casing (4) is a hollow cylindrical structure, the stator assembly (5) is located in the inner ring of the casing (4), and the two ends of the casing (4) are respectively fixedly connected to one side of an end cover (3).

5. A disc motor structure according to claim 3, characterized in that: A rotor (6) is arranged on each end cover (3), and the two rotors (6) are respectively located at two ends of the stator assembly (5), and each rotor (6) comprises a back iron (61), a permanent magnet (62) and a fixing block (63), one end of the back iron (61) is abutted against one end of the end cover (3), and the other end of the back iron (61) is abutted against one end of the permanent magnet (62), and the permanent magnet (62) is detachably connected to the end cover (3) via the fixing block (63).

6. A disc motor structure according to claim 5, characterized in that: An annular mounting groove is provided at one end of the end cover (3), the inner ring of the annular mounting groove is a sloped groove wall, the permanent magnet (62) comprises a plurality of magnetic steels (621), and the plurality of magnetic steels (621) are arranged circumferentially in the mounting groove, one side of each magnetic steel (621) is attached to one end of the back iron (61), one end of each magnetic steel (621) is provided with a slope surface matching the sloped groove wall, the slope surface can fit into the sloped groove wall, and the other end of the magnetic steel (621) is abutted to the outer ring groove wall of the annular mounting groove through a fixing block (63).

Images