CN204992862U - Exchange asynchronous inner rotor motor - Google Patents

Abstract

The utility model relates to an AC asynchronous inner rotor motor, which comprises a casing, a stator, a rotor and a motor end cover; The end cover; the cylindrical surface of the stator core of the stator is provided with two or more cutting surfaces distributed equidistantly along the circumference of its axis and extending along its axis; the arc-shaped cylindrical surface between the cutting surfaces is expanded and pressed on the machine On the inner wall of the shell; the coaxial positioning block group is provided on the end face of the motor end cover and the casing; the coaxial positioning block group includes more than two arc-shaped cylindrical surfaces concentric with the stator core, and rotated by the rotor Arc-shaped positioning blocks equidistantly distributed around the axis; the number of the arc-shaped positioning blocks is equal to the number of arc-shaped cylinders; the arc-shaped positioning blocks are located on the edge of the motor end cover and cooperate with the mouth of the casing; The arc-shaped positioning block is in one-to-one correspondence with the arc-shaped cylinder. The utility model has good coaxiality and can effectively solve the jamming phenomenon of the corrugated gasket during installation.

Description

An AC asynchronous inner rotor motor

technical field

The utility model relates to an AC asynchronous inner rotor motor.

Background technique

The performance and quality of the motor not only depends on the correct design parameters, but also the processing quality and assembly quality of the parts play a decisive role in the final performance of the motor. As one of the main parts of the motor, the end cover is an important part that supports the rotation of the motor rotor through the installation of bearings. Its machining accuracy and assembly accuracy play a key role in the noise, smooth operation and performance of the motor.

In order to control the axial movement of the motor rotor and reduce the running noise and runout caused by the clearance of the bearing itself, so as to achieve the purpose of reducing noise and running smoothly, the effective solution is to install wave gaskets in the bearing housing of the end cover. The deformation of the wave washer gives the bearing a preload. However, the traditional end cover bearing housing has a step at the rear. When the corrugated gasket is installed, the corrugated gasket is often stuck by this step, and the operator needs to confirm each one to adjust the stuck corrugated gasket. This phenomenon not only greatly affects the fluency of production, but also cannot confirm whether the wave pad moves again after assembly, which affects production efficiency and at the same time has quality risks (see Figure 3).

At the same time, the outer stator of some inner rotor motors is fixedly connected with the inner wall of the housing through expansion and compression. Since the cylindrical surface of the stator iron core of some outer stators is provided with a cut surface, when the housing is connected with the stator core by expansion and pressure, the housing will be deformed and out of round. When the motor end cover is connected, due to the deformation of the casing, the motor end cover and the stator core are prone to misalignment after the motor end cover is connected to the casing. The coaxiality of the motor end cover, stator core and rotor affects the uniformity of the air gap between the rotor and the stator, which is not conducive to the optimal performance of the motor.

Utility model content

The purpose of the utility model is to provide an AC asynchronous inner rotor motor which has good coaxiality and can effectively solve the jamming phenomenon when the corrugated gasket is installed.

The technical solution for realizing the purpose of the utility model is: the utility model comprises a casing, a stator, a rotor and a motor end cover; The motor end cover; the cylindrical surface of the stator core of the stator is provided with two or more cut surfaces equidistantly distributed along the circumference of its axis and extending along its axis; the arc-shaped cylindrical surface between the cut surfaces is expanded and pressed On the inner wall of the casing; the coaxial positioning block group is provided on the end surface where the motor end cover matches with the casing; the coaxial positioning block group includes more than two arc cylindrical surfaces concentric with the stator core, and the rotor Arc-shaped positioning blocks equidistantly distributed around the circumference of the rotation axis; the number of the arc-shaped positioning blocks is equal to the number of arc-shaped cylinders; the arc-shaped positioning blocks are located on the edge of the motor end cover and cooperate with the mouth of the casing; The arc-shaped positioning blocks correspond to the arc-shaped cylindrical surfaces one by one.

Both ends of the above-mentioned stator core are provided with connection holes at each arc-shaped cylindrical surface; each arc-shaped positioning block is provided with connection through-holes corresponding to the connection holes; the motor end cover is threaded through the connection screws. It is connected with the stator core and the casing through the connection through hole and the connection hole.

The end cover of the motor is provided with an end cover bearing seat chamber; the end cover bearing seat chamber includes an annular side surface, an annular bottom surface perpendicular to the annular side surface, and an elastic washer annular chamber forming a transition with the annular bottom surface; the elastic washer annular chamber A shaft-through hole is provided in the center of the bottom surface; the side wall transitionally connected between the spring washer annular chamber and the annular bottom surface is a conical surface; the spring washer annular chamber is in the shape of a truncated cone, and the side wall closes to the shaft-through hole end; the annular side , the annular bottom surface, the spring washer annular chamber and the shaft-through hole are all coaxial.

The included angle between the side wall and the annular bottom surface that is transitionally connected between the spring washer annular chamber and the annular bottom surface is 20°.

There are four cut surfaces on the cylindrical surface of the stator core; the coaxial positioning block set includes four arc positioning blocks.

The utility model has positive effects: (1) The utility model can ensure the coaxiality of the stator core and the motor end cover through the arc-shaped positioning block on the motor end cover, and also ensure the alignment between the rotor and the stator and the motor end cover. coaxiality, so as to ensure the uniform air gap between the stator and the rotor, and realize the optimal performance of the motor; The coaxiality between the stator core and the motor end cover can be guaranteed by direct connection; (3) the side wall of the transition connection between the ring chamber of the spring pad and the bottom surface of the ring in the utility model is a conical surface, which solves the problem when installing the corrugated gasket. The problem that the corrugated gasket is easy to get stuck has improved the installation speed; (4) when the included angle between the side wall and the annular bottom surface of the elastic gasket annular chamber in the utility model is 20°, the use effect is the best.

Description of drawings

In order to make the content of the utility model easier to understand clearly, the utility model will be further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of motor end cover in the utility model;

Fig. 3 is a schematic diagram of the jamming when the corrugated gasket is installed on the existing motor end cover;

Fig. 4 is a sectional view of the motor end cover in the present invention.

detailed description

See Fig. 1, Fig. 2 and Fig. 4, the utility model comprises casing 1, stator, rotor and motor end cover 2; The end is fixed with a motor end cover 2; the cylindrical surface of the stator core 3 of the stator is provided with four cut surfaces 31 distributed equidistantly along the circumference of its axis and extending along its axis; between the cut surfaces 31 and the cut surfaces 31 The arc-shaped cylindrical surface 32 is expanded and pressed on the inner wall of the casing 1; the end face of the motor end cover 2 and the casing 1 is provided with a coaxial positioning block group; the coaxial positioning block group includes four and stator iron The arc-shaped cylindrical surface 32 of the core 3 is concentric, and the arc-shaped positioning blocks 4 are distributed equidistantly around the circumference of the rotor rotation axis; the arc-shaped positioning blocks 4 are located on the edge of the motor end cover 2 and cooperate with the mouth of the casing 1; The arc-shaped positioning block 4 is in one-to-one correspondence with the arc-shaped cylindrical surface 32 .

Both ends of the stator core 3 are provided with connection holes at each arc-shaped cylindrical surface 32; each of the arc-shaped positioning blocks 4 is provided with connection through holes corresponding to the connection holes; the motor end cover 2. Connect the stator core 3 and the casing 1 through the connecting through hole and the connecting hole through the connecting screw.

The motor end cover 2 is provided with an end cover bearing seat chamber 21; the end cover bearing seat chamber 21 includes an annular side surface 21-1, an annular bottom surface 21-2 perpendicular to the annular side surface 21-1, and an annular bottom surface 21-2. 2 forming a transitional spring washer annular chamber 21-3; the center of the bottom surface of the spring washer annular chamber 21-3 is provided with a shaft-through hole 22; the side of the transition connection between the spring washer annular chamber 21-3 and the annular bottom surface 21-2 The wall is a conical surface; the spring washer annular chamber 21-3 is in the shape of a truncated cone, and the side wall closes to the end of the shaft hole; the annular side 21-1, the annular bottom surface 21-2, the spring washer annular chamber 21-3 and The shaft-through holes 22 are all coaxial; the angle between the side wall of the spring washer annular chamber 21-3 and the annular bottom surface 21-2 transitionally connected to the annular bottom surface 21-2 is 20°.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present utility model in detail. It should be understood that the above descriptions are only specific embodiments of the present utility model and are not intended to limit the present invention. For the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (5)

1. an alternating current asynchronous inner rotor motor, comprises casing (1), stator, rotor and electric motor end cap (2); Described stator is fixedly installed in casing (1), and rotor turns is arranged in stator, and the two ends of casing (1) are fixed with electric motor end cap (2); It is characterized in that: the face of cylinder of the stator core (3) of described stator is provided with two or more and is equally spaced and along the tangent plane (31) of its Axis Extension along its circumference; Arc cylinder (32) swelling pressure between described tangent plane (31) and tangent plane (31) is on casing (1) inwall; The end face that described electric motor end cap (2) coordinates with casing (1) is provided with coaxial positioning block group; It is concentric with the arc cylinder (32) of stator core (3) that described coaxial positioning block group comprises two or more, and with the arc locating piece (4) that rotor rotation axis circumference is equally spaced; The quantity of described arc locating piece (4) is equal with the quantity of arc cylinder (32); Described arc locating piece (4) is positioned at the edge of electric motor end cap (2) and coordinates with the oral area of casing (1); Described arc locating piece (4) and arc cylinder (32) one_to_one corresponding.

2. a kind of alternating current asynchronous inner rotor motor according to claim 1, is characterized in that: the two ends of described stator core (3) are positioned at each arc cylinder (32) place and are equipped with connecting hole; Described each arc locating piece (4) is equipped with the connecting through hole corresponding with connecting hole; Described electric motor end cap (2) is linked together through connecting through hole and connecting hole and stator core (3) and casing (1) by connecting screw.

3. a kind of alternating current asynchronous inner rotor motor according to claim 1 and 2, is characterized in that: described electric motor end cap (2) is provided with end-cover axle bearing room (21); Described end-cover axle bearing room (21) comprises annular side (21-1), the annular bottom surface (21-2) vertical with annular side (21-1) and forms the bullet pad doughnut (21-3) of transition with annular bottom surface (21-2); The bottom center of described bullet pad doughnut (21-3) is provided with wears axis hole (22); The sidewall that described bullet pad doughnut (21-3) is connected with annular bottom surface (21-2) transition is taper seat; Described bullet pad doughnut (21-3) is in circular cone shape, and sidewall closes up to wearing axis hole end; Described annular side (21-1), annular bottom surface (21-2), bullet pad doughnut (21-3) and to wear axis hole (22) all coaxial.

4. a kind of alternating current asynchronous inner rotor motor according to claim 3, is characterized in that: the angle of the sidewall that described bullet pad doughnut (21-3) is connected with annular bottom surface (21-2) transition and annular bottom surface (21-2) is 20 °.

5. a kind of alternating current asynchronous inner rotor motor according to claim 4, is characterized in that: the face of cylinder of described stator core (3) is provided with four tangent planes (31); Described coaxial positioning block group comprises four arc locating pieces (4).