Motor and assembling method thereof

Abstract

The invention discloses a motor and an assembling method thereof, and relates to the technical field of motors, the motor comprises a stator base and a stator core fixedly arranged in the stator base, and the outer side surface of the stator core is wrapped with a reinforcing sheet; the reinforcing sheet is arranged between the stator base and the stator iron core, the rigidity of the stator is increased through the reinforcing sheet, the inherent frequency of the stator is improved, the risk of resonance of the motor is reduced, serious safety accidents caused by vibration of the motor are avoided, and the safety of the motor is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a motor and an assembling method thereof. Background Art

[0002] As the core component driving various mechanical equipment, the stability of the motor's operating state is crucial to the safety, reliability and efficiency of the entire system. Due to the interaction between the mechanical and structural characteristics and the control system, the frequency of the motor's mechanical system is excited close to a certain order of natural frequency, the system amplitude increases significantly, the motor resonates, and the motor vibrates, which can reach levels 2-6. The vibration will shorten the life of the winding insulation and bearings, affect the normal lubrication of the sliding bearings, and the vibration force will cause the insulation gap to expand, allowing external dust and moisture to invade, resulting in reduced insulation resistance and increased leakage current, and even insulation breakdown and other accidents, causing serious safety accidents. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a motor and an assembly method thereof, which solve the technical problem that the existing motor has low safety due to vibration.

[0004] To achieve the above object, the present invention provides a motor, including a stator frame and a stator core fixed in the stator frame, wherein the outer side of the stator core is wrapped with a reinforcing sheet; the reinforcing sheet is arranged between the stator frame and the stator core.

[0005] Preferably, the reinforcement sheet is an annular structure; the first end of the reinforcement sheet is flush with the first end of the stator core; and the second end of the reinforcement sheet is disposed beyond the second end of the stator core.

[0006] Preferably, a guide portion is formed at the second end of the reinforcement sheet, and the guide portion is arranged beyond the second end of the stator core; the guide portion is used to guide the reinforcement sheet into the stator frame; and in the axial direction along the stator core, the guide portion maintains a set axial length.

[0007] Preferably, the reinforcement sheet is adhered to the outer side surface of the stator core.

[0008] Preferably, the thickness of the reinforcing sheet satisfies: H=0.1-0.2 mm, wherein H is the thickness of the reinforcing sheet.

[0009] Preferably, a plurality of cleat slots are provided on the outer side surface of the stator core, and all of the cleat slots are distributed along the circumference of the stator core;

[0010] The reinforcing sheet is fixed in the buckle sheet groove by means of fastening screws; the number of the fastening screws is greater than or equal to three, and all the fastening screws are evenly distributed along the circumference of the stator core.

[0011] Preferably, the reinforcing plate includes a first joint and a second joint butted against each other, a connection between the first joint and the second joint is aligned with one of the buckle plate slots, and the first joint and the second joint are fixed in the buckle plate slot by means of fastening screws.

[0012] Preferably, the reinforcing sheet is formed with a recessed groove, and the recessed groove is used to accommodate a fastening screw; the depth of the recessed groove is greater than the height of the head of the fastening screw.

[0013] Preferably, the reinforcement sheet is an iron sheet.

[0014] The present invention also provides a method for assembling a motor, which is applied to the above motor and comprises:

[0015] Wrap the reinforcement sheet around the outer side of the stator core;

[0016] When the stator frame is heated to the set temperature, the stator core is pressed into the stator frame;

[0017] The stator winding is placed in the stator slots of the stator frame.

[0018] Compared with the background technology, the present invention adds a reinforcement plate between the stator frame and the stator core, uses the reinforcement plate to increase the stator stiffness, improves the natural frequency of the stator, reduces the risk of resonance of the motor, avoids serious safety accidents caused by vibration of the motor, and effectively improves the safety of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 A half-section schematic diagram of a motor provided by a specific embodiment of the present invention;

[0021] Figure 2 for Figure 1 A partial enlarged view of middle A;

[0022] Figure 3 for Figure 1 A schematic cross-sectional view of the stator core and reinforcement sheets;

[0023] Figure 4 for Figure 3 A partial enlarged view of B.

[0024] The reference numerals are as follows:

[0025] The stator frame 1 , the stator core 2 , the clip slots 21 , the reinforcing sheets 3 , the guide parts 31 and the fastening screws 4 . DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] The embodiment of the present invention discloses a motor, as shown in the attached Figures 1 to 3 As shown, it includes a stator frame 1 and a stator core 2. The stator core 2 is fixed in the stator frame 1. The outer side of the stator core 2 is wrapped with a reinforcing sheet 3. The reinforcing sheet 3 is arranged between the stator frame 1 and the stator core 2. The reinforcing sheet 3 increases the stiffness of the stator in a wrapped manner, improves the natural frequency of the stator, reduces the risk of resonance of the motor, avoids serious safety accidents caused by vibration of the motor, and effectively improves the safety of the motor.

[0029] The reinforcing sheet 3 is an annular structure, which is in close contact with the outer side of the stator core 2. The cross section of the reinforcing sheet 3 is specifically annular. The first end of the reinforcing sheet 3 is flush with the first end of the stator core 2; the second end of the reinforcing sheet 3 is arranged beyond the second end of the stator core 2, wherein the second end of the stator core 2 is the press-fit end of the stator core 2 pressed into the stator frame 1, and the second end of the reinforcing sheet 3 exceeds the press-fit end of the stator core 2, so that the reinforcing sheet 3 enters the stator frame 1 before the stator core 2, thereby preventing the reinforcing sheet 3 from flipping over during the press-fitting process.

[0030] As a preferred embodiment, the second end of the reinforcing sheet 3 is formed with a guide portion 31, which is arranged beyond the second end of the stator core 2; the guide portion 31 is in a circular ring shape, and due to the thinness of the guide portion 31, when pressed, the guide portion 31 has a tendency to gather in the radial direction under the extrusion of the stator frame 1, and can be changed from a cylindrical shape to a conical shape, so as to guide the reinforcing sheet 3 to drive the stator core 2 into the stator frame 1, and ensure that the reinforcing sheet 3 and the stator core 2 smoothly enter the stator frame 1. In the axial direction along the stator core 2, the guide portion 31 maintains a set axial length L, and the set axial length is specifically L20mm, but is not limited thereto.

[0031] The reinforcing sheet 3 is bonded to the outer side of the stator core 2 to ensure that the reinforcing sheet 3 is reliably fixed to the outer side of the stator core 2, to prevent the reinforcing sheet 3 from being separated from the stator core 2 during press-fitting, and to improve the rigidity of the stator core 2. Specifically, the reinforcing sheet 3 can be bonded to the outer side of the stator core 2 using 801 glue.

[0032] The thickness of the reinforcing sheet 3 satisfies: H=0.1~0.2mm, where H is the thickness of the reinforcing sheet 3; B is preferably 0.1mm to avoid the thickness of the reinforcing sheet 3 being too large and increasing the difficulty of assembling the stator core 2. The length of the reinforcing sheet 3 is equal to the circumference of the outer side of the stator core 2.

[0033] As attached Figure 3 and 4 As shown, the outer side surface of the stator core 2 is provided with a plurality of cleat slots 21, and all the cleat slots 21 are evenly distributed along the circumference of the stator core 2. The reinforcing sheet 3 is fixed to the cleat slots 21 by means of the fastening screws 4, ensuring that the reinforcing sheet 3 is reliably fixed to the outer side surface of the stator core 2. The number of fastening screws 4 is greater than or equal to three, and all the fastening screws 4 are evenly distributed along the circumference of the stator core 2, ensuring that the reinforcing sheet 3 is reliably fixed. The locking screws can specifically be self-tapping screws, and the number of locking screws can be adjusted according to the length of the stator core 2, which is not specifically limited here.

[0034] The reinforcing sheet 3 includes a first joint and a second joint that are butted against each other, and the connection between the first joint and the second joint is aligned with one of the cleat slots 21, preferably the cleat slot 21 of the stator core 2 with windings. The first joint and the second joint are fixed in the cleat slot 21 by means of fastening screws 4, ensuring that the reinforcing sheet 3 completely and reliably wraps the stator core 2.

[0035] When the fastening screw 4 locks and fixes the reinforcing sheet 3 to the clip groove 21 of the stator core 2, since the clip groove 21 has a certain depth in the radial direction of the stator core 2, the reinforcing sheet 3 will form a recessed groove under the extrusion of the locking screw, and the recessed groove is used to accommodate the fastening screw 4. The depth of the recessed groove is greater than the head height of the fastening screw 4, ensuring that the head of the locking screw falls completely into the recessed groove, avoiding the head of the locking screw being higher than the reinforcing sheet 3 and causing an excessive gap between the stator core 2 and the stator frame 1, thereby improving the installation accuracy of the stator core 2 in the stator frame 1. The recessed groove can be a V-shaped groove, but is not limited thereto.

[0036] The reinforcing sheet 3 is specifically an iron sheet to ensure that the reinforcing sheet 3 has sufficient rigidity, but is not limited thereto, and may also be a copper sheet, for example.

[0037] The embodiment of the present invention also discloses an assembly method, which is applied to the above-mentioned motor, including: firstly wrapping the reinforcing sheet 3 on the outer side of the stator core 2, and then pressing the stator core 2 into the stator frame 1 when the stator frame 1 is heated to a set temperature; finally, placing the stator winding in the stator slot of the stator frame 1. During the motor assembly process, the reinforcing sheet 3 is added between the stator core 2 and the stator frame 1 to increase the stiffness of the stator, improve the natural frequency of the stator, reduce serious safety accidents caused by vibration of the motor, and effectively improve the safety of the motor.

[0038] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0039] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A motor, characterized in that: It comprises a stator base (1) and a stator core (2) fixed in the stator base (1), the outer side surface of the stator core (2) being wrapped with a reinforcing sheet (3); the reinforcing sheet (3) being arranged between the stator base (1) and the stator core (2).

2. The motor according to claim 1, characterized in that The reinforcing sheet (3) is an annular structure; the first end of the reinforcing sheet (3) is flush with the first end of the stator core (2); and the second end of the reinforcing sheet (3) is arranged beyond the second end of the stator core (2).

3. The motor according to claim 2, characterized in that A guide portion (31) is formed at the second end of the reinforcing sheet (3), and the guide portion (31) is arranged beyond the second end of the stator core (2); the guide portion (31) is used to guide the reinforcing sheet (3) into the stator frame (1); and in the axial direction along the stator core (2), the guide portion (31) maintains a set axial length.

4. The motor according to any one of claims 1 to 3, characterized in that: The reinforcement sheet (3) is bonded to the outer side surface of the stator core (2).

5. The motor according to any one of claims 1 to 3, characterized in that: The thickness of the reinforcing sheet (3) satisfies: H=0.1-0.2 mm, wherein H is the thickness of the reinforcing sheet (3).

6. The motor according to any one of claims 1 to 3, characterized in that: The outer side surface of the stator core (2) is provided with a plurality of clip grooves (21), and all of the clip grooves (21) are distributed along the circumference of the stator core (2); The reinforcing sheet (3) is fixed to the clip groove (21) by means of a fastening screw (4); the number of the fastening screws (4) is greater than or equal to three, and all the fastening screws (4) are evenly distributed along the circumference of the stator core (2).

7. The motor according to claim 6, characterized in that The reinforcing plate (3) comprises a first joint and a second joint butted against each other, the connection between the first joint and the second joint being aligned with one of the buckle plate slots (21), and the first joint and the second joint being fixed in the buckle plate slot (21) by means of the fastening screws (4).

8. The motor according to claim 6, characterized in that The reinforcing sheet (3) is formed with a recessed groove, the recessed groove being used to accommodate the fastening screw (4); the depth of the recessed groove is greater than the height of the head of the fastening screw (4).

9. The motor according to any one of claims 1 to 3, characterized in that: The reinforcing sheet (3) is specifically an iron sheet.

10. A method for assembling a motor, characterized in that: The motor according to any one of claims 1 to 9 comprises: Wrap the reinforcement sheet around the outer side of the stator core; When the stator frame is heated to a set temperature, the stator core is pressed into the stator frame; The stator winding is placed in the stator slots of the stator frame.

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