A motor stator that facilitates coil assembly

Abstract

A motor stator for easy coil assembly relates to the field of motor technology. It requires only one winding machine to produce coils of various specifications. Through improvements to the core unit structure, the coil windings can be directly fitted onto the core unit, making assembly simple and convenient. The stator includes several core units connected in sequence, each core unit having a coil winding. Each core unit includes an arc-shaped connecting section. One end of the arc-shaped connecting section has a mounting section perpendicular to its end tangent. The thickness of the arc-shaped connecting section is not greater than the thickness of the mounting section. The other end of the arc-shaped connecting section has a protrusion. The side of the mounting section that connects to the outer diameter of the arc-shaped connecting section has a chamfered bevel. A groove corner bevel that mates with the protrusion is provided on the chamfered bevel. A groove that mates with the protrusion is also provided on the chamfered bevel.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a motor stator that facilitates coil assembly. Background Technology

[0002] Currently, stator cores are mostly manufactured using methods such as integral stamping and strip-coated stamping. These stator core manufacturing methods generally result in high waste, low material utilization, and high overall motor costs. Strip-coated stamping typically offers better material utilization than integral stamping.

[0003] The invention with application number CN201910577920.2 discloses a motor stator and a motor having the same, as well as a method for manufacturing the motor stator. The stator core can be assembled from segmented cores and then wound internally using a winding machine to form a stator winding, or the coil can be formed externally before assembling the segmented cores and then assembled. This can improve equipment utilization and production efficiency.

[0004] However, this motor stator has the same drawbacks as existing technologies: whether the coil is wound on a core block or a stator composed of core blocks, the coil must be wound on each core block. The coil winding speed or stator production efficiency is low, and this method requires the investment of various special winding equipment, resulting in high investment costs. Utility Model Content

[0005] I. Technical problems to be solved

[0006] This invention addresses the shortcomings of existing technologies by proposing a motor stator that facilitates coil assembly. It requires only one winding machine to produce coils of various specifications and models. Furthermore, through improvements to the core unit structure, the coil windings can be directly mounted on the core unit, making assembly simple and convenient.

[0007] II. Specific Technical Solutions

[0008] A motor stator for easy coil assembly includes several core units connected in sequence. Each core unit has a coil winding. Each core unit includes an arc-shaped connecting section. One end of the arc-shaped connecting section has a mounting section perpendicular to its end tangent. The thickness of the arc-shaped connecting section is not greater than the thickness of the mounting section. The other end of the arc-shaped connecting section has a protrusion. The side of the mounting section that connects to the outer diameter of the arc-shaped connecting section has a chamfered bevel, and a groove is provided on the chamfered bevel. When two core units are joined, the groove and the protrusion cooperate.

[0009] Implementation principle and working principle:

[0010] The motor stator of this design is composed of several core units connected sequentially. Each core unit consists of an arc-shaped connecting section and a mounting section. The side where the arc-shaped connecting section and the mounting section connect is provided with a chamfered bevel. When connecting core units, they are connected through the protrusion of the arc-shaped connecting section and the groove of the chamfered bevel. When assembling the coil windings, the pre-wound coil windings are passed through the arc-shaped connecting section, then through the chamfered bevel into the mounting section, and finally the core units are assembled to complete the motor stator assembly. The thickness settings of the arc-shaped connecting section and the mounting section ensure that the coil winding assembly is completed smoothly.

[0011] Preferably, the protrusion includes a connecting end located on the side away from the arc-shaped connecting section, and the cross-sectional width of the connecting end is greater than that of the side where the protrusion is located on the arc-shaped connecting section. The advantage of this preferred embodiment is that the connection between the core units is more stable by setting the width of the protrusion.

[0012] Preferably, limiting protrusions are provided on both sides of the free end of the mounting section, and the limiting protrusions are located on the side away from the arc-shaped connecting section. The beneficial effect of this preferred option is that, in this solution, by setting the limiting protrusions, the assembled coil winding can be prevented from detaching from the mounting section.

[0013] Preferably, the angle between the chamfered bevel and the side of the mounting section is 105°-135°. The advantage of this preferred option is that the setting of this angle makes the thickness at the connection between the arc-shaped connecting section and the mounting section less than the overall thickness of the mounting section, which makes the assembly of the coil winding smooth.

[0014] Preferably, insulating frames are provided on both sides of the mounting section, and the insulating frames are arranged along the axial direction of the motor stator. The advantage of this preferred embodiment is that by providing insulating frames, current leakage and short circuits can be prevented when the motor stator is assembled.

[0015] Preferably, the two ends of the outer diameter of the arc-shaped connecting section are recessed to form a receiving groove, which is a welding joint groove. The beneficial effect of this preferred option is that by setting the receiving groove or welding joint groove, the surface consistency is better after the iron core unit is assembled and welded.

[0016] Preferably, the tangent at the point connecting the arc-shaped connecting segment and the inner side of the mounting segment is perpendicular to the adjacent side of the mounting segment.

[0017] Preferably, the coil winding is a flat wire winding or a round wire winding, and the coil winding is sleeved on the mounting section along the arc-shaped connecting section. The advantage of this preferred option is that this solution can not only meet the requirements of round wire winding as in the prior art, but also directly assemble prefabricated flat wire windings, thus having better versatility.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. The motor stator of this solution consists of protrusions and operating mechanisms of the core unit. Different numbers of core units can be selected for stator assembly according to requirements, making it more applicable and versatile.

[0020] 2. By using the protrusion at the free end of the arc-shaped connecting section and the welded joint groove, the connection strength between the core units can be improved.

[0021] 3. By setting the chamfered bevel, the thickness at the connection between the installation section and the arc-shaped connection section can be reduced while ensuring strength, which can effectively ensure the smooth installation of the coil winding. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the motor stator according to an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of a core unit with coil windings according to an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Iron core unit; 2. Coil winding; 3. Arc-shaped connection section; 4. Mounting section; 5. Protrusion; 6. Chamfered beveled surface; 7. Groove; 8. Connection end; 9. Limiting protrusion; 10. Insulating frame; 11. Welding joint groove. Detailed Implementation

[0026] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] like Figure 1-2 As shown:

[0028] A motor stator that facilitates coil assembly includes a plurality of iron core units 1 connected in sequence. In this embodiment, as shown... Figure 1 The motor stator of this design mainly consists of 12 iron core units 1 connected end to end; such as Figure 2 The left side of the core unit 1 is an arc-shaped connecting section 3. The right end of the arc-shaped connecting section 3 is integrally formed or welded with an installation section 4 that is perpendicular to the tangent of its right end. The installation section 4 is used for the installation of the coil winding 2.

[0029] During implementation, the thickness of the arc-shaped connecting section 3 shall not exceed the thickness of the installation section 4, specifically as follows: Figure 2A chamfered bevel surface 6 is provided at the lower right corner of the core unit 1. The angle between the chamfered bevel surface 6 and the side of the mounting section 4 that is connected is 105°-135°. This angle setting makes the thickness of the connection between the arc-shaped connecting section 3 and the mounting section 4 less than the overall thickness of the mounting section 4. When installing the coil winding 2, the pre-wound coil winding 2 is inserted from the left side of the arc-shaped connecting section 3, and then enters the mounting section 4 through the chamfered bevel surface 6. The assembly of the coil winding 2 is smooth through the chamfered bevel surface 6, the thickness setting of the arc-shaped connecting section 3 and the mounting section 4.

[0030] In implementation, the left integrally formed right protrusion 5 of the arc-shaped connecting section 3 has a groove 7 in the middle of the chamfered bevel surface 6 that matches the protrusion 5. Specifically, the upper end of the protrusion 5 is the connecting end 8, which is located on the side away from the arc-shaped connecting section 3. The width of the top cross-section of the connecting end 8 is greater than the width of the bottom cross-section of the protrusion 5. By setting the width of the protrusion 5, the connection between the protrusion 5 and the groove 7 can be made more stable after the iron core units 1 are connected.

[0031] In implementation, to prevent the coil winding 2 from detaching from the mounting section 4 after installation, limiting protrusions 9 are provided on both sides of the top end of the mounting section 4, symmetrically positioned at the top of the mounting section 4. The limiting protrusions 9 prevent the assembled coil winding 2 from detaching from the mounting section 4. In implementation, if... Figure 2 The insulating frame 10 is bonded or threaded to both sides of the mounting section 4. The insulating frame 10 is set along the axial direction of the motor stator. The insulating frame 10 can prevent current leakage and short circuit when the motor stator is assembled.

[0032] In practice, to ensure better surface uniformity of the motor stator after the core unit 1 is assembled and welded, receiving grooves are formed at both ends of the outer diameter of the arc-shaped connecting section 3, where the receiving grooves are welding joint grooves 11. In practice, to improve the versatility of the mounting section 4, the coil winding 2 on it is either a flat wire winding or a round wire winding. This allows for both the direct winding of round wire windings onto the mounting section 4 as in the prior art and the direct assembly of prefabricated flat wire windings, resulting in better versatility and efficiency.

[0033] The implementation process of this plan is as follows:

[0034] First, the corresponding core unit 1 is produced separately, and the pre-winding of the coil winding is completed. Then, the pre-wound coil winding 2 is first fitted onto the left end of the arc-shaped connecting section 3, and then the sliding coil winding 2 enters the mounting section 4 through the chamfered bevel surface 6. Then, the assembled core unit 1 is connected by the cooperation of the protrusion 5 and the groove 7, and finally the joint groove 11 is welded. The significant difference between this solution and the existing technology is that the winding in the existing technology can only be directly wound on the mounting section 4, and the pre-wound coil winding 2 cannot be directly fitted onto the structure of the existing technology. It can only be wound on-site, which is inefficient and requires a variety of special winding equipment, resulting in higher costs. However, this solution, through the improvement of the structure of the core unit 1, can separate the winding process of the coil winding 2. The assembly of the coil winding 2 can be achieved simply by fitting it onto the wall, which is less difficult and more efficient.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims.

Claims

1. A motor stator for easy coil assembly, comprising a plurality of iron core units (1) connected in sequence, wherein coil windings (2) are provided on the iron core units (1), characterized in that: The core unit (1) includes an arc-shaped connecting section (3). One end of the arc-shaped connecting section (3) is provided with an installation section (4) perpendicular to its end tangent. The thickness of the arc-shaped connecting section (3) is not greater than the thickness of the installation section (4). The other end of the arc-shaped connecting section (3) is provided with a protrusion (5). The side of the installation section (4) connected to the outer diameter of the arc-shaped connecting section (3) is provided with a chamfered bevel surface (6). A groove (7) is provided on the chamfered bevel surface (6). When two core units (1) are spliced, the groove (7) and the protrusion (5) cooperate.

2. The motor stator for easy coil assembly according to claim 1, characterized in that: The protrusion (5) includes a connecting end (8), which is located on the side away from the arc-shaped connecting section (3). The cross-sectional width of the connecting end (8) is greater than that of the protrusion (5) located on the side where the arc-shaped connecting section (3) is located.

3. The motor stator for easy coil assembly according to claim 2, characterized in that: Limiting protrusions (9) are provided on both sides of the free end of the installation section (4), and the limiting protrusions (9) are located on the side away from the arc-shaped connecting section (3).

4. The motor stator for easy coil assembly according to claim 1, characterized in that: The angle between the chamfered beveled surface (6) and the side of the mounting section (4) is 105°-135°.

5. The motor stator for easy coil assembly according to claim 1, characterized in that: Insulating frames (10) are provided on both sides of the installation section (4), and the insulating frames (10) are arranged along the axial direction of the motor stator.

6. The motor stator for easy coil assembly according to claim 1, characterized in that: The two ends of the outer diameter of the arc-shaped connecting section (3) are sunken to form a receiving groove, which is a welding joint groove (11).

7. The motor stator for easy coil assembly according to claim 1, characterized in that: The coil winding (2) is a flat wire winding or a round wire winding, and the coil winding (2) is sleeved on the mounting section (4) along the arc-shaped connecting section (3).

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