Motor

Abstract

The utility model discloses a motor, and relates to the technical field of motors, the motor comprises a stator base and a stator iron core fixedly arranged in the stator base, and the outer side surface of the stator iron 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 utility model relates to motor technical field, especially a kind of motor. BACKGROUND

[0002] Motor is the core component of driving various mechanical equipment, and the stability of its operating state is crucial to the safety, reliability and efficiency of the whole system. Due to the interaction between mechanical and structural characteristics and control system, the frequency of excitation of the mechanical system of the motor is close to the natural frequency of a certain order, the system amplitude increases significantly, the motor resonates, and vibration occurs. The vibration can reach 2-6 levels, and the vibration can shorten the life of winding insulation and bearing, affect the normal lubrication of sliding bearing, and the vibration force can expand the insulation gap, allowing dust and moisture from the outside to invade, causing the insulation resistance to decrease and the leakage current to increase, and even causing insulation breakdown and other accidents, which can cause serious safety accidents. SUMMARY

[0003] Therefore, the utility model aims to provide a motor to solve the technical problem of low safety caused by vibration in the existing motor.

[0004] To achieve the above-mentioned purpose, the utility model provides a motor, which comprises a stator frame and a stator core fixed in the stator frame. 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 reinforcing sheet has a ring structure. The first end of the reinforcing sheet is flush with the first end portion of the stator core. The second end of the reinforcing sheet is arranged beyond the second end of the stator core.

[0006] Preferably, the second end of the reinforcing sheet forms a guide portion, which is arranged beyond the second end of the stator core. The guide portion is used to guide the reinforcing sheet into the stator frame. In the axial direction of the stator core, the guide portion maintains a certain axial length.

[0007] Preferably, the reinforcing sheet is fixed to the outer side of the stator core.

[0008] Preferably, the thickness of the reinforcing sheet satisfies H=0.1~0.2mm, where H is the thickness of the reinforcing sheet.

[0009] Preferably, the outer side of the stator core is provided with a plurality of buckle grooves, and all the buckle grooves are distributed along the circumference of the stator core.

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

[0011] Preferably, the reinforcing piece includes a first connector and a second connector that are mated together, the connection points of the first connector and the second connector are aligned with one of the fastening slots, and the first connector and the second connector are fixed in the fastening slot by means of fastening screws.

[0012] Preferably, the reinforcing sheet has a recessed groove for accommodating the fastening screw; the depth of the recessed groove is greater than the head height of the fastening screw.

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

[0014] Compared to the prior art, this utility model adds a reinforcing plate between the stator frame and the stator core. The reinforcing plate increases the stator stiffness, raises the stator's natural frequency, reduces the risk of motor resonance, avoids serious safety accidents caused by motor vibration, and effectively improves motor safety. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This is a half-sectional schematic diagram of a motor provided in a specific embodiment of the present utility model;

[0017] Figure 2 for Figure 1 A magnified view of part A in the image;

[0018] Figure 3 for Figure 1 A schematic diagram of the cross-section of the middle stator core and reinforcing plates;

[0019] Figure 4 for Figure 3 A magnified view of part B in the image.

[0020] The attached figures are labeled as follows:

[0021] Stator base 1, stator core 2, lamination slot 21, reinforcing plate 3, guide part 31, and fastening screw 4. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] This utility model discloses a motor, as shown in the attached figure. Figures 1 to 3 As shown, the device includes a stator frame 1 and a stator core 2. The stator core 2 is fixed inside the stator frame 1. A reinforcing plate 3 is wrapped around the outer side of the stator core 2. The reinforcing plate 3 is located between the stator frame 1 and the stator core 2. The reinforcing plate 3 increases the stiffness of the stator by wrapping it around the stator, increases the natural frequency of the stator, reduces the risk of resonance of the motor, avoids serious safety accidents caused by motor vibration, and effectively improves the safety of the motor.

[0025] The reinforcing piece 3 has a ring-shaped structure and is tightly attached to the outer surface of the stator core 2. The cross-section of the reinforcing piece 3 is specifically ring-shaped. The first end of the reinforcing piece 3 is flush with the first end of the stator core 2; the second end of the reinforcing piece 3 extends beyond the second end of the stator core 2. The second end of the stator core 2 is the pressing end where the stator core 2 is pressed into the stator frame 1. The fact that the second end of the reinforcing piece 3 extends beyond the pressing end of the stator core 2 allows the reinforcing piece 3 to enter the stator frame 1 before the stator core 2, preventing the reinforcing piece 3 from flipping over during the pressing process.

[0026] In a preferred embodiment, the second end of the reinforcing piece 3 has a guide portion 31, which extends beyond the second end of the stator core 2. The guide portion 31 is annular in shape. Due to its thinness, during press-fitting, the guide portion 31 tends to converge radially under the pressure of the stator housing 1, transforming from a cylindrical shape to a conical shape. This guides the reinforcing piece 3 and the stator core 2 into the stator housing 1, ensuring that the reinforcing piece 3 and the stator core 2 smoothly enter the stator housing 1. Along the axial direction of the stator core 2, the guide portion 31 maintains a set axial length L, specifically L = 20 mm, but not limited to this.

[0027] The reinforcing piece 3 is adhered to the outer surface of the stator core 2 to ensure that the reinforcing piece 3 is reliably fixed to the outer surface of the stator core 2, prevent the reinforcing piece 3 from detaching from the stator core 2 during press-fitting, and improve the rigidity of the stator core 2. Specifically, 801 glue can be used to adhere the reinforcing piece 3 to the outer surface of the stator core 2.

[0028] The thickness of the reinforcing plate 3 satisfies: H = 0.1~0.2mm, where H is the thickness of the reinforcing plate 3; B is preferably 0.1mm to avoid increasing the assembly difficulty of the stator core 2 due to excessive thickness of the reinforcing plate 3. The length of the reinforcing plate 3 is equal to the perimeter of the outer surface of the stator core 2.

[0029] As attached Figure 3 and 4 As shown, the outer surface of the stator core 2 is provided with several latching slots 21, all of which are evenly distributed along the circumference of the stator core 2. The reinforcing plate 3 is fixed to the latching slots 21 by fastening screws 4, ensuring that the reinforcing plate 3 is reliably fixed to the outer surface of the stator core 2. The number of fastening screws 4 is greater than or equal to three, and all of them are evenly distributed along the circumference of the stator core 2, ensuring that the reinforcing plate 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; no specific limitation is made here.

[0030] The reinforcing piece 3 includes a first joint and a second joint that are mated together. The connection point of the first joint and the second joint is aligned with one of the clip slots 21, preferably at the clip slot 21 of the stator core 2 with windings. The first joint and the second joint are fixed in the clip slot 21 by means of fastening screws 4, ensuring that the reinforcing piece 3 completely and reliably wraps around the stator core 2.

[0031] When the fastening screw 4 locks and fixes the reinforcing piece 3 into the latching groove 21 of the stator core 2, since the latching groove 21 has a certain depth in the radial direction of the stator core 2, the reinforcing piece 3 will form a recessed groove under the pressure of the fastening screw. 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 fastening screw completely falls into the recessed groove, avoiding the head of the fastening screw being higher than the reinforcing piece 3, which would create an excessive gap between the stator core 2 and the stator frame 1, thus 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 to this.

[0032] The reinforcing plate 3 is specifically made of iron to ensure that it has sufficient rigidity, but it is not limited to this; for example, it can also be made of copper.

[0033] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0034] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An electric motor, characterized in that, It includes a stator frame (1) and a stator core (2) fixed in the stator frame (1), and the outer side of the stator core (2) is wrapped with a reinforcing plate (3); the reinforcing plate (3) is located between the stator frame (1) and the stator core (2).

2. The motor according to claim 1, characterized in that, The reinforcing plate (3) has a ring structure; the first end of the reinforcing plate (3) is flush with the first end of the stator core (2); the second end of the reinforcing plate (3) extends beyond the second end of the stator core (2).

3. The motor according to claim 2, characterized in that, The second end of the reinforcing piece (3) is provided with a guide portion (31), which extends beyond the second end of the stator core (2); the guide portion (31) is used to guide the reinforcing piece (3) into the stator frame (1); the guide portion (31) maintains a set axial length in the axial direction along the stator core (2).

4. The motor according to any one of claims 1 to 3, characterized in that, The reinforcing sheet (3) is adhered to the outer side 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, where 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 surface of the stator core (2) is provided with a plurality of latching slots (21), and all the latching slots (21) are distributed along the circumference of the stator core (2); The reinforcing plate (3) is fixed to the fastening plate groove (21) by fastening screws (4); 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).

7. The motor according to claim 6, characterized in that, The reinforcing piece (3) includes a first connector and a second connector that are mated together. The connection points of the first connector and the second connector are aligned with one of the fastening slots (21), and the first connector and the second connector are fixed in the fastening slot (21) by means of the fastening screw (4).

8. The motor according to claim 6, characterized in that, The reinforcing piece (3) has a recessed groove for accommodating the fastening screw (4); the depth of the recessed groove is greater than the head height 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.

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