CN209963884U - Motor structure - Google Patents

Abstract

The utility model discloses a motor structure, comprising a stator, a rotor, a motor shaft, a first bearing and a second bearing; the rotor is fixedly connected with the motor shaft; the inner ring of the first bearing is fixed with the stator, and the outer ring is fixed with the rotor; The inner ring of the bearing is fixed with the motor shaft, and the outer ring is fixed with the stator. The utility model discloses a motor structure. When the motor rotor is under force, the outer ring of the first bearing supports the rotor, the inner ring of the first bearing transmits the external force to the stator, and the external load of the motor is mainly borne by the first bearing. The second bearing and motor shaft are only subjected to tension and minimal torsion.

Description

a motor structure

technical field

The utility model relates to a motor, in particular to a motor structure.

Background technique

Motors have been applied in many fields at present, and the existing motors are generally provided with two bearings, and the two bearings are sleeved on the motor shaft, so as to realize the relative rotation of the stator and the rotor of the motor. However, the structure in which the two bearings are sleeved on the motor shaft requires a large load on the motor shaft, which requires higher strength of the motor shaft.

In the prior art, Chinese patent CN106688163A discloses a motor, a gimbal with a motor and an unmanned aerial vehicle with a gimbal, which include: a casing and a drive shaft assembly installed in the casing; the drive The shaft assembly includes a drive shaft, a first bearing and a second bearing, the drive shaft includes a drive end and a fixed end, the drive end is used to connect an external element and drive the external element to rotate, and the fixed end extends into the In the housing, the first bearing and the second bearing are respectively sleeved on the driving end and the fixed end, and the outer circumference of the cross section of the driving end is larger than the outer circumference of the cross section of the fixed end. , so as to prevent the first bearing and the second bearing from disengaging from the driving end. The inner ring of the first bearing can be fixed with the drive shaft to rotate together with the drive shaft, the outer ring of the first bearing can be fixed with the second housing; the inner ring of the second bearing can be fixed with the drive shaft. The shaft is fixed for rotation with the drive shaft, and the outer ring of the second bearing can be fixed with the stator seat. The drive shaft (ie, the motor shaft) in this structure needs to carry a large load, and the strength of the drive shaft is required to be high during use.

Utility model content

In view of the above problems, the present invention provides a motor structure, which aims to solve the problems that the motor shaft of the existing motor structure needs to carry a large load, and the strength of the drive shaft is required to be high during use.

The utility model adopts the following technical solutions to achieve the above object:

A motor structure includes a stator, a rotor, a motor shaft, a first bearing and a second bearing; the rotor is fixedly connected to the motor shaft; the inner ring of the first bearing is fixed to the stator, the outer ring is fixed to the rotor; the inner ring of the second bearing is fixed It is fixed with the motor shaft, and the outer ring is fixed with the stator. In the motor structure of this scheme, when the motor rotor is stressed, the outer ring of the first bearing supports the rotor, and the inner ring of the first bearing transmits the external force to the stator, and the external load of the motor is mainly borne by the first bearing, and the second Bearings and motor shafts are only subject to tension and minimal torsion.

A further technical solution is that the rotor and the motor shaft are fixedly connected by one of integral molding, screw connection or tight fitting.

The beneficial effects of the present utility model are:

The utility model provides a motor structure, when the motor rotor is under force, the rotor is supported by the outer ring of the first bearing, the inner ring of the first bearing transmits the external force to the stator, and the external load of the motor is mainly borne by the first bearing, The second bearing and motor shaft are only subjected to tension and minimal torsion.

Description of drawings

FIG. 1 is a schematic diagram of a motor structure according to the present utility model.

FIG. 2 is a schematic diagram showing the components of a motor structure according to the present utility model.

In the picture:

1. Stator; 2. Rotor; 3. Motor shaft; 41. First bearing; 42. Second bearing; 5. Magnet sleeve; 6. Encoder; 7. Motor winding; 8. Motor magnet; 9. Motor end cover ; 11, the first clamping part; 12, the second clamping part; 13, the third clamping part; 14, the fourth clamping part.

Detailed ways

The present utility model will be described in detail below with reference to Figures 1 to 2 and the specific embodiments. The following embodiments and features in the embodiments may be combined with each other without conflict.

As shown in FIG. 1 to FIG. 2 , this embodiment provides a motor structure, the motor includes a stator 1, a rotor 2, a motor shaft 3, a first bearing 41, a second bearing 42, a magnet sleeve 5, an encoder 6, a motor Winding 7, motor magnet 8; wherein, the motor shaft 3 and the rotor 2 are integrally formed, the first bearing 41 and the second bearing 42 have an inner ring, an outer ring and balls between the inner ring and the outer ring, the first bearing 41 It is sleeved on the stator 1, the inner ring of the first bearing 41 is fixed to the stator 1, the outer ring of the first bearing 41 is fixed to the rotor 2, the second bearing 42 is sleeved on the motor shaft 3, and the inner ring of the second bearing 42 is connected to the motor The shaft 3 is fixed, and the outer ring of the second bearing 42 is fixed with the stator 1;

One end of the motor shaft 3 is integrally formed with the rotor 2, and the other end is connected with the magnet sleeve 5. The specific connection method between the motor shaft 3 and the magnet sleeve 5 can be realized by tight fitting, threading, gluing, etc. The magnet sleeve 5 is provided with an induction magnet, The encoder 6 is gap-fitted with the induction magnet to detect the rotation angle of the motor;

The stator 1 is provided with a motor winding 7 , and the inner wall of the rotor 2 is provided with a motor magnet 8 matched with it to generate a magnetic field, thereby realizing the rotation of the rotor 2 relative to the stator 1 .

The assembly process of the motor is as follows: the stator 1 is equipped with a motor winding 7, and the inner wall of the rotor 2 is equipped with a matching motor magnet 8; the first bearing 41 is sleeved on the stator 1, and its inner ring is fixed with the stator 1, and the stator 1 A first detent portion 11 is provided on the upper part, which is used to cooperate with the inner ring of the first bearing 41; the rotor 2 is integrally formed with the motor shaft 3, and the motor shaft 3 is inserted inside the stator 1 and is clearance-fitted with the stator 1; At this time, the outer ring of the first bearing 41 is fixed to the rotor 2, and the rotor 2 is provided with a second locking portion 12 for matching with the outer ring of the first bearing 41. The first locking portion 11 and the second locking portion 12 The position part 12 realizes the limit of the first bearing 41; the second bearing 42 is sleeved on the other end of the motor shaft 3, its inner ring is fixed with the motor shaft 3, the outer ring is fixed with the stator 1, and the stator 1 is provided with a third The retaining portion 13 is used to cooperate with the outer ring of the second bearing 42 , the magnet sleeve 5 is connected with the motor shaft 3 through threads, and the edge of the magnet sleeve 5 forms a fourth retaining portion 14 , which is used for the inner ring of the second bearing 42 . Ring fit, the third retaining portion 13 and the fourth retaining portion 14 realize the limiting of the second bearing 42 ; finally, the encoder 6 and the end cover 9 are fixedly connected to the stator 1 by screws.

The above embodiment exemplarily shows the connection relationship between the motor shaft 3 and the rotor 2. According to other embodiments and practical applications, the motor shaft 3 can also be connected with the rotor 2 by means of screw connection or tight fitting, so as to realize the connection between the motor shaft 3 and the rotor 2. Rotor 2 is linked.

The utility model provides a motor structure, when the rotor 2 of the motor is subjected to force, the rotor is supported by the outer ring of the first bearing 41, and the inner ring of the first bearing 41 transmits the external force to the stator 1, and the external load of the motor is mainly composed of The first bearing 41 bears the load, and the second bearing 42 and the motor shaft 3 are only subjected to tensile force and minimal torsional force.

Claims (2)

1. A motor structure comprises a stator (1), a rotor (2), a motor shaft (3), a first bearing (41) and a second bearing (42); the rotor (2) is fixedly connected with the motor shaft (3); the stator is characterized in that the inner ring of the first bearing (41) is fixed with the stator (1), and the outer ring of the first bearing is fixed with the rotor (2); the inner ring of the second bearing (42) is fixed with the motor shaft (3), and the outer ring of the second bearing is fixed with the stator (1).

2. A motor construction, according to claim 1, characterized in that said rotor (2) is fixedly connected to the motor shaft (3) by one of the means of integral forming, screwing or interference fit.

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