A stator structure for an axial motor

Abstract

This utility model discloses a stator structure for an axial motor, including a stator pressure plate, a stator support, a stator core, and a coil. The stator core consists of several stator teeth arranged in a circular pattern. The coil is wound around the stator teeth. The stator pressure plates are located at both ends of the stator teeth, and the two stator pressure plates are fixed together by the stator support. This utility model adopts an assembly structure, reducing the difficulty of coil winding; furthermore, the coil is fixed by positioning pressure plates on both sides to ensure proper assembly and prevent the coil from loosening under stress during operation.

Description

Technical Field

[0001] This utility model relates to the field of electric motors, and in particular to a stator structure for an axial motor. Background Technology

[0002] With the rapid development of global industrialization, the demand for miniaturization and lightweighting of equipment has become increasingly strong. Against this backdrop, disc motors have become increasingly popular due to their advantages such as short axial length, compact structure, high power density, and high efficiency, and are widely used in industries such as industry, aerospace, new energy power generation, and electric vehicles.

[0003] Traditional refrigeration compressor motors are mainly driven by cylindrical asynchronous motors and permanent magnet synchronous motors. The motor is treated as an accessory; the rotor is directly mounted on the compressor's main shaft, while the stator is installed inside the housing, integrating with the compressor into a single unit, achieving a unified design. However, cylindrical motors have a long axial length and large winding ends, resulting in a large space occupied by the motor section and consequently a large compressor unit. Furthermore, the excessively long winding ends lead to high copper losses and low efficiency.

[0004] The dual-rotor disc motor, with its stator windings directly wound on the stator teeth and almost no ends, has a short axial length, bringing new opportunities for the miniaturization and weight reduction of compressor-type equipment. Utility Model Content

[0005] In view of the above-mentioned defects in the prior art, the main purpose of this utility model is to overcome the shortcomings of the prior art and disclose a stator structure of an axial motor, including a stator pressure plate, a stator support, a stator core and a coil. The stator core is composed of a number of stator teeth distributed in a circular pattern. The coil is wound on the stator teeth. The stator pressure plates are respectively disposed at both ends of the stator teeth. The two stator pressure plates are fixed together by the stator support.

[0006] Furthermore, the stator teeth have a strip-shaped structure.

[0007] Furthermore, one or both ends of the stator tooth are provided with end plates, and the upper and lower ends of the end plates protrude from the upper and lower surfaces of the stator tooth, respectively.

[0008] Furthermore, the two sides of the end plate protrude beyond the two sides of the stator teeth.

[0009] Furthermore, the stator pressure plate has a disc structure.

[0010] Furthermore, the stator pressure plate is recessed with a positioning groove that mates with the end of the stator teeth.

[0011] Furthermore, a through connecting groove is provided on the stator pressure plate, and the end of the stator tooth is fixed in the connecting groove.

[0012] Furthermore, the inner wall of the connecting groove is tapered or has a stepped structure.

[0013] Furthermore, the stator pressure plate is provided with connecting holes along its circumference, and the stator support is fixed to the connecting holes.

[0014] Furthermore, the stator support is fixed to the connecting hole by bolts.

[0015] The beneficial effects achieved by this utility model are:

[0016] This utility model adopts an assembly structure to reduce the difficulty of coil winding; it is then fixed by positioning plates on both sides, and the surface of the positioning plates further presses the coil to ensure that the coil is assembled in place and to prevent the coil from loosening under force during operation. Attached Figure Description

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

[0018] Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 19 Schematic diagrams of different stator tooth structures;

[0019] Figure 6 and Figure 7 Schematic diagrams of different stator pressure plates;

[0020] Figure 8 A three-dimensional structural diagram showing a stepped structure for the connecting groove of the stator pressure plate;

[0021] Figure 9 for Figure 8 Enlarged view of A in the middle;

[0022] Figure 10 A cross-sectional view showing a stepped structure for the connecting groove of the stator pressure plate;

[0023] Figure 11 for Figure 10 Enlarged view of B in the middle;

[0024] Figure 12 A schematic diagram showing a tapered structure provided for the connecting groove of the stator pressure plate;

[0025] Figure 13 This is a schematic diagram of the stator support structure;

[0026] Figure 14 This is a schematic diagram showing the mating of stator teeth without end plates with stator pressure plates having positioning grooves;

[0027] Figure 15 This is a schematic diagram showing the mating of stator teeth without end plates with stator pressure plates having stepped connecting grooves;

[0028] Figure 16 This is a schematic diagram showing the mating of stator teeth without end plates with a stator pressure plate having a tapered connecting groove;

[0029] Figure 17 A schematic diagram showing the mating of stator teeth with one end plate and stator pressure plate;

[0030] Figure 18 A schematic diagram showing the fit between stator teeth with end plates on both sides and stator pressure plate with stepped connecting grooves;

[0031] Figures 19-21 This is a schematic diagram showing the fit between the stator teeth with positioning protrusions and the stator pressure plate.

[0032] The attached figures are labeled as follows:

[0033] 1. Stator pressure plate, 2. Stator support, 3. Stator teeth, 4. Coil, 11. Positioning groove, 12. Connecting groove, 13. Connecting hole, 31. End plate, 32. Positioning protrusion. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0035] A stator structure for an axial motor, such as Figure 1 As shown, the device includes a stator pressure plate 1, a stator support 2, a stator core, and a coil 4. The stator core consists of several stator teeth 3 arranged in a circular pattern. The coil 4 is wound around the stator teeth 3. The stator pressure plate 1 is located at both ends of the stator teeth 3, supporting and fixing the stator teeth 3. This modular structure allows the coil 4 to be assembled with the stator teeth 3 before being installed with the stator pressure plate 1, facilitating the winding of the coil 4.

[0036] Among them, the stator pressure plate 1 is made of non-magnetic material, such as epoxy laminated glass cloth board, PEEK material, etc., which has sufficient mechanical strength and small expansion coefficient, and cannot be deformed or dissolved when exposed to oil.

[0037] Coil 4 can be made of flat copper wire or round copper wire. When using flat copper wire, after the coil is wound by a machine, insulating paper is placed on the stator teeth 3, and then it is directly put onto the stator teeth. When using round copper wire, multiple coils are used in parallel. After placing insulating paper on the stator teeth 3, the coil is wound directly, or one end of the stator teeth 3 is first fixed to the stator pressure plate 1, and the coil 4 is then put onto the stator teeth 3 after it is wound.

[0038] In one embodiment, such as Figure 1 and 2 As shown, the stator teeth 3 have a strip-shaped structure. The stator teeth 3 are used to support the coils 4. Furthermore, the stator teeth are part of the magnetic circuit. The stator teeth are made of powder metallurgy soft magnetic material SMC and are integrally die-cast using a mold.

[0039] In the above embodiments, such as Figures 1-5 As shown, in order to further facilitate the winding of the coil 4, an end plate 31 is provided at one or both ends of the stator tooth 3, and the upper and lower ends of the end plate 31 protrude from the upper and lower surfaces of the stator tooth 3.

[0040] In the above embodiments, such as Figure 5 As shown, the two sides of the end plate 31 protrude beyond the two sides of the stator tooth 3.

[0041] In one embodiment, such as Figure 1 As shown, the stator pressure plate 1 has a disc-like structure. During assembly, the two stator pressure plates 1 are arranged in parallel and connected and fixed by the stator support column 2. The length of the stator support column 2 is slightly less than the distance between the two end plates, with a difference of 0.1 to 0.2 mm, so that the two pressure plates can be pressed tightly together. The stator support column 2 is made of a non-magnetic, non-metallic material to avoid the influence of the end magnetic field on it.

[0042] In one embodiment, such as Figure 13 As shown, the stator support 2 has recessed screw holes at both ends, and bolts pass through the stator pressure plate 1 and connect to the screw holes of the stator support 2. The stator support 2 is not limited to having screw holes at both ends; it can also have an axially formed through hole with an internal thread that mates with the bolt; that is, the through hole is a fully threaded hole.

[0043] In the above embodiments, such as Figure 6 As shown, the stator pressure plate 1 has a recessed positioning groove 11 that mates with the end of the stator tooth 3. During assembly, the end of the stator tooth 3 is inserted into the positioning groove 11, and the stator tooth 3 is fixed and limited by the positioning groove 11.

[0044] In another embodiment, such as Figure 7 As shown, a through connecting groove 12 is provided on the stator pressure plate 1, and the end of the stator tooth 3 is fixed in the connecting groove 12.

[0045] In the above embodiments, such as Figure 7 As shown, the inner wall of the connecting groove 12 is tapered or stepped. This prevents the end of the stator tooth 3 from directly passing through the connecting groove 12, thus serving as an axial limit.

[0046] Specifically, such as Figures 8-11As shown, the stator tooth 3 has an end plate 31 at its end, and a stepped structure is provided on the end plate 31. A matching stepped structure is provided in the connecting groove 12. The end plate 31 is placed in the connecting groove 12 and the stator tooth 3 is limited by the stepped structure.

[0047] In addition, such as Figure 12 As shown, the inner wall of the connecting groove 12 is provided with a tapered structure, that is, the inner wall of the connecting groove 12 is a trumpet-shaped structure. Correspondingly, the end of the stator tooth 3 or the side wall of the end plate 3 is provided with a tapered structure that mates with the inner wall of the connecting groove 12. After assembly, the axial and circumferential directions of the stator tooth 3 are limited by the engagement of the connecting groove 12 with the tapered structure at the end of the stator tooth 3. In one embodiment, as shown... Figure 6 As shown in Figure 7, the positioning plate 1 has connecting holes 13 along its circumference, and the stator support 2 is fixed to the connecting holes 13. Preferably, the stator support 2 is fixed to the connecting holes 13 by bolts.

[0048] In this embodiment, the connection structure between the stator support 2 and the positioning pressure plate 1 has two combination structures. Specific Implementation Example 1

[0050] like Figure 1 and Figure 13 As shown, the connecting hole 13 of the positioning plate 1 is a smooth hole, and the two ends of the stator support 2 are provided with screw holes that mate with bolts. During connection, the bolt passes through the connecting hole and connects with the screw hole on the stator support 2. Preferably, the connecting hole is a countersunk hole, and the head of the bolt is hidden in the groove of the countersunk hole to avoid the bolt protruding from the surface of the stator plate 1 when installed on the machine base, which would affect the installation with the machine base.

[0051] The following section describes in detail the structural fit between stator teeth 3 and stator pressure plate 1. Specific Implementation Example 2

[0053] like Figure 14 As shown, the stator teeth 3 are strip-shaped structures without end plates 31, and the stator pressure plates 1 are circular disc-shaped structures with positioning grooves 11 recessed on their surfaces. During assembly, the coil 4 is wound around the stator teeth 3, and then the ends of the stator teeth 3 are inserted into the positioning grooves 11. The two stator pressure plates 1 are then connected and fixed by the stator support column 2. Specific Implementation Example 3

[0055] like Figure 15 and Figure 16 As shown, the stator tooth 3 is a strip structure without end plate 31, and the stator pressure plate 1 is a circular disc structure with a connecting groove 12 on its surface. The connecting groove 12 has a tapered or stepped structure. During assembly, the coil 4 is wound around the stator tooth 3, and then the end of the stator tooth 3 is inserted into the positioning groove 11. The two stator pressure plates 1 are connected and fixed by the stator support 2. Specific Implementation Example 4

[0057] like Figure 17 The stator teeth 3 shown are strip-shaped structures with an end plate 31 at one end. Two different structures are chosen for the stator pressure plates 1: one is a disc structure, and the other has a disc structure with a recessed positioning groove 11 or connecting groove 12 on its surface. If a connecting groove 12 is provided, it has a tapered or stepped structure. During assembly, after the coil 4 is wound around the stator teeth 3, the end plate 31 is assembled with the positioning groove 11 or connecting groove 12, and the other end is directly pressed against the surface of the disc-shaped positioning pressure plate 1. The two stator pressure plates 1 are connected by the stator support column 2. Specific Implementation Example 5

[0059] like Figure 1 and Figure 18 As shown, the stator teeth 3 are strip-shaped structures with end plates 31 at both ends. The stator pressure plates 1 are disc-shaped structures with recessed positioning grooves 11 or connecting grooves 12 on their surfaces. If they are connected grooves 12, they have a tapered or stepped structure. During assembly, the coil 4 is wound around the stator teeth 3, and the end plates 31 are assembled with the positioning grooves 11 or connecting grooves 12. The two stator pressure plates 1 are connected by stator support columns 2.

[0060] Example 6

[0061] like Figures 20-21 As shown, the stator tooth 3 has a strip-shaped structure with end plates 31 at both ends. Positioning protrusions 32 are provided on the end plates 31, and positioning grooves 11 that mate with the positioning protrusions 32 are provided on the surface of the stator pressure plate 1. During assembly, the positioning protrusions 32 are placed in the positioning grooves 11, and the end plates 31 are tightly attached to the positioning pressure plate 1. The positioning protrusions 32 and the positioning grooves 11 are used to position the stator tooth 3. The positioning pressure plates 1 at both ends are connected by positioning supports 2 to clamp and fix the positioning tooth 3. The positioning protrusions 32 include, but are not limited to, circular, square, and polygonal shapes.

[0062] In the above embodiments, the coil 4 can be pre-assembled and then assembled with the stator pressure plate 1, adopting an assembly structure to facilitate the winding of the coil 4. A positioning groove 11 or a connecting groove 12 is provided to limit the stator teeth 3, and at the same time, the surface of the stator pressure plate 1 is used to press the coil 4.

[0063] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of implementation of the present utility model. Any modifications or equivalent substitutions to the present utility model without departing from the spirit and scope thereof should be covered within the protection scope of the claims of the present utility model.

Claims

1. A stator structure for an axial motor, characterized in that, It includes a stator pressure plate, a stator support, a stator core, and a coil. The stator core consists of several stator teeth arranged in a circular pattern. The coil is wound on the stator teeth. The stator pressure plates are located at both ends of the stator teeth. The two stator pressure plates are fixed together by the stator support.

2. The stator structure of an axial motor according to claim 1, characterized in that, The stator teeth have a strip-shaped structure.

3. The stator structure of an axial motor according to claim 2, characterized in that, One or both ends of the stator tooth are provided with end plates, and the upper and lower ends of the end plates protrude from the upper and lower surfaces of the stator tooth, respectively.

4. The stator structure of an axial motor according to claim 3, characterized in that, The two sides of the end plate protrude beyond the two sides of the stator teeth.

5. The stator structure of an axial motor according to claim 1, characterized in that, The stator pressure plate has a disc structure.

6. The stator structure of an axial motor according to claim 5, characterized in that, The stator pressure plate is recessed with a positioning groove that mates with the end of the stator teeth.

7. The stator structure of an axial motor according to claim 5, characterized in that, The stator pressure plate is provided with a through connecting groove, and the end of the stator tooth is fixed in the connecting groove.

8. The stator structure of an axial motor according to claim 7, characterized in that, The inner wall of the connecting groove is tapered or stepped.

9. The stator structure of an axial motor according to claim 1, characterized in that, The stator pressure plate is provided with connecting holes along its circumference, and the stator support is fixed to the connecting holes.

10. The stator structure of an axial motor according to claim 9, characterized in that, The stator support is fixed to the connecting hole by bolts.

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