Fastening structure of stator in motor

Abstract

The purpose of the present invention is to provide a fastening structure for the stator in a motor with reliable connection and simple structure. A plurality of fan-shaped stator units are connected in series to form an annular stator core. A support tube is inserted into the inner hole of the annular stator core by interference fit. A hole or a slot is provided on the fan-shaped stator unit. The length direction of the hole or the slot is parallel to the core axis direction of the annular stator core. A fastening clip passes through the hole or the slot and presses the fan-shaped stator unit. The fastening clip is fixed to the support tube by bolts. After the support tube is inserted into the inner hole of the assembled annular stator core by interference fit, under the interference effect of the support tube, each fan-shaped stator unit moves outward in a balanced and radial manner, so as to achieve the purpose of tightening the fan-shaped stator unit by the support tube. Then, the fastening clip passes through the hole or the slot provided on the fan-shaped stator unit and presses the fan-shaped stator unit. The fastening clip is fixed to the support tube by bolts to achieve the fastening of the stator core.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a fastening structure of a stator in a motor. Background Art

[0002] On the same day, the applicant of this application submitted an application entitled "Stator inside the motor". The sector-shaped stator units are connected in series through tenons and mortise to form a circular stator core. The problem with this structure is that if the tenon and mortise are too loose, the motor will produce noise and vibration, and if they are too tight, it cannot be assembled. Therefore, how to fasten the sector-shaped stator units is an urgent problem to be solved. Summary of the invention

[0003] The object of the present invention is to provide a fastening structure of a stator in a motor which has reliable connection and simple structure.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a fastening structure of the stator in the motor, including a fan-shaped stator unit composed of multiple stator punching units stacked together, a circular ring-shaped stator core formed by connecting multiple fan-shaped stator units in series, a support tube is interference fit into the inner hole of the circular ring-shaped stator core, a hole or a groove is opened on the fan-shaped stator unit, the length direction of the hole or the groove is parallel to the core axis direction of the circular ring-shaped stator core, a fastening buckle plate passes through the hole or the groove and presses the fan-shaped stator unit, and a bolt fixes the fastening buckle plate to the support tube.

[0005] In the above scheme, since the annular stator core is formed by connecting a plurality of sector-shaped stator units in series, the entire annular stator core is loose after assembly. After the support tube is interference fit into the inner hole of the assembled annular stator core, under the interference effect of the support tube, each sector-shaped stator unit moves outward in a balanced and radial manner, so that the support tube tightens the sector-shaped stator unit. Then, the fastening buckle plate passes through the hole or groove provided on the sector-shaped stator unit and presses the sector-shaped stator unit. The bolts fix the fastening buckle plate to the support tube to achieve the fastening of the stator core. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 A perspective view of the present invention;

[0007] Figure 2 for Figure 1 The main view of

[0008] Figure 3 for Figure 2 A cross-sectional view of

[0009] Figure 4 for Figure 1 A partially enlarged schematic diagram of

[0010] Figure 5A structural diagram of a fastening buckle;

[0011] Figure 6 A cross-sectional view of the support tube. DETAILED DESCRIPTION

[0012] Combine the following Figure 1-Figure 6 The present invention is described in further detail.

[0013] A fastening structure for a stator in a motor comprises a sector-shaped stator unit 10 formed by stacking a plurality of stator punching units together, a circular stator core formed by connecting a plurality of sector-shaped stator units 10 in series, a support tube 20 interference fits into an inner hole of the circular stator core, a hole or a groove 11 is provided on the sector-shaped stator unit 10, a length direction of the hole or the groove 11 is parallel to a core axis direction of the circular stator core, a fastening clip 30 passes through the hole or the groove 11 and presses the sector-shaped stator unit 10, and a bolt 40 fixes the fastening clip 30 to the support tube 20. Since the annular stator core is formed by connecting a plurality of fan-shaped stator units 10 in series, the entire annular stator core is loose after being assembled. After the support tube 20 is inserted into the inner hole of the assembled annular stator core, under the interference effect of the support tube 20, each fan-shaped stator unit 10 moves outward in a balanced and radial manner, so as to achieve the purpose of tightening the fan-shaped stator unit 10 by the support tube 20, and then the fastening clip 30 passes through the hole or slot 11 provided on the fan-shaped stator unit, and presses the fan-shaped stator unit, and the bolts fix the fastening clip 30 on the support tube 20 to achieve the fastening of the stator core. At the same time, the hole or slot 11 for the fastening clip 30 to pass through also constitutes a part of the internal circulation air path, optimizing the cooling structure inside the motor.

[0014] Specifically, the fastening clip 30 is in the shape of a Chinese character "X" as a whole, the middle piece 31 is pressed tightly against the hole wall of the hole or slot 11, the end pieces 32 at both ends are in contact with the wall of the support tube 20, and the end pieces 32 are provided with through holes 321, and the bolts 40 pass through the through holes 321 and are fixedly connected to the support tube 20. After the support tube 20 tightens the sector-shaped stator unit 10, the fastening clip 30 fixes each sector-shaped stator unit 10 on the support tube 20, thereby realizing the fastening of the stator core.

[0015] Furthermore, a reinforcing rib 33 is provided on the middle sheet 31 of the fastening buckle 30. The provision of the reinforcing rib 33 not only increases the strength of the fastening buckle 30, but also increases the contact area between the stator core and the air inside the motor, thereby improving the cold zone circulation inside the motor. In order to ensure the patency of the hole or slot 11 as the internal circulation air path, the reinforcing rib 33 is arranged perpendicular to the middle sheet 31, and the reinforcing rib 33 is arranged perpendicular to the middle sheet 31, and the length of the reinforcing rib 33 is consistent with the length of the middle sheet 31, and the width of the reinforcing rib 33 is less than the width of the hole or slot 11.

[0016] In order to enable the bolt 40 to be securely connected to the support tube 20, the support tube 20 is arranged coaxially with the annular stator core and both ends of the support tube 20 protrude from the outside of the annular stator core, and threaded holes 21 are provided on the two ends of the support tube 20 protruding from the outside, and the threaded holes 21 are arranged one by one correspondingly to the positions of the through holes 321 of the fastening buckle 30.

[0017] Furthermore, the hole or slot 11 is arranged near the inner end of the sector-shaped stator unit 10 , the length of the middle sheet 31 is consistent with the length of the hole or slot 11 , and the connecting sheet 34 between the middle sheet 31 and the end sheet 32 ​​is in contact with the end of the sector-shaped stator unit 10 .

Claims

1. A fastening structure of a stator in a motor, characterized in that: The invention comprises a sector-shaped stator unit (10) formed by stacking a plurality of stator punching units, a circular stator core formed by connecting a plurality of sector-shaped stator units (10) in series, a support tube (20) inserted into the inner hole of the circular stator core by interference fit, a hole or a groove (11) is provided on the sector-shaped stator unit (10), the length direction of the hole or the groove (11) is parallel to the core axis direction of the circular stator core, a fastening clip (30) passes through the hole or the groove (11) and presses the sector-shaped stator unit (10), and a bolt (40) fixes the fastening clip (30) on the support tube (20).

2. The fastening structure of the stator in the motor according to claim 1, characterized in that: The fastening buckle plate (30) is in the shape of a "X" as a whole, the middle plate body (31) is pressed tightly against the hole wall of the hole or groove (11), the end plates (32) at both ends are in contact with the tube wall of the support tube (20), and the end plates (32) are provided with through holes (321), and the bolts (40) pass through the through holes (321) to be fixedly connected with the support tube (20).

3. The fastening structure of the stator in the motor according to claim 2, characterized in that: A reinforcing rib sheet (33) is provided on the middle sheet body (31) of the fastening buckle sheet (30), the reinforcing rib sheet (33) is arranged perpendicular to the middle sheet body (31), the reinforcing rib sheet (33) is arranged perpendicular to the middle sheet body (31), the length of the reinforcing rib sheet (33) is consistent with the length of the middle sheet body (31), and the width of the reinforcing rib sheet (33) is smaller than the width of the hole or the groove (11).

4. The fastening structure of the stator in the motor according to claim 2, characterized in that: The support tube (20) is coaxially arranged with the annular stator core, and both ends of the support tube (20) protrude outside the two ends of the annular stator core. Threaded holes (21) are provided on the two ends of the support tube (20) protruding outside, and the positions of the threaded holes (21) and the through holes (321) of the fastening buckle plate (30) are arranged one by one.

5. The fastening structure of the stator in the motor according to claim 3, characterized in that: The hole or slot (11) is arranged on the fan-shaped stator unit (10) near the inner end, the length of the middle sheet (31) is consistent with the length of the hole or slot (11), and the connecting sheet (34) between the middle sheet (31) and the end sheet (32) is in contact with the end of the fan-shaped stator unit (10).

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