CN209963884U

CN209963884U - Motor structure

Info

Publication number: CN209963884U
Application number: CN201921095881.4U
Authority: CN
Inventors: 叶梓龙; 苏晓
Original assignee: Guilin Zhishen Information Technology Co Ltd
Current assignee: Guilin Zhishen Information Technology Co Ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2020-01-17
Anticipated expiration: 2029-07-12

Abstract

The utility model discloses a motor structure, which comprises a stator, a rotor, a motor shaft, a first bearing and a second bearing; the rotor is fixedly connected with a motor shaft; the inner ring of the first bearing is fixed with the stator, and the outer ring of the first bearing is fixed with the rotor; the inner ring of the second bearing is fixed with the motor shaft, and the outer ring of the second bearing is fixed with the stator. The utility model discloses a motor structure, when the electric motor rotor atress, by the outer lane support rotor of first bearing, the inner circle of first bearing passes external force to the stator, and the external load of motor mainly is undertaken by first bearing, and second bearing and motor shaft only receive pulling force and minimum torsion.

Description

Motor structure

Technical Field

The utility model relates to a motor especially relates to a motor structure.

Background

The motor is applied to a plurality of fields at present, and the existing motor is generally provided with two bearings which are sleeved on a motor shaft so as to realize the relative rotation of a stator and a rotor of the motor. However, the two bearings are sleeved on the motor shaft, so that the load borne by the motor shaft is large, and the requirement on the strength of the motor shaft is high.

In the prior art, chinese patent CN106688163A discloses a motor, a holder with the motor and an unmanned aerial vehicle with the holder, which should include: the driving shaft assembly is arranged in the shell; the drive shaft assembly includes: the driving shaft comprises a driving end and a fixing end, the driving end is used for connecting an external element and driving the external element to rotate, the fixing end extends into the shell, the first bearing and the second bearing are respectively sleeved on the driving end and the fixing end, and the peripheral size of the cross section of the driving end is larger than that of the cross section of the fixing end so as to prevent the first bearing and the second bearing from being separated from the driving end. The inner ring of the first bearing may be fixed with the drive shaft to rotate together with the drive shaft, and the outer ring of the first bearing may be fixed with the second housing; the inner race of the second bearing may be fixed with the drive shaft to rotate with the drive shaft, and the outer race of the second bearing may be fixed with the stator base. The driving shaft (namely the motor shaft) in the structure needs to bear a large load, and the strength requirement of the driving shaft is high in the using process.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a motor structure aims at solving current motor structure motor shaft and needs to bear great load, requires higher scheduling problem to the intensity of drive shaft in the use.

The utility model discloses take following technical scheme to realize above-mentioned purpose:

a motor structure comprises a stator, a rotor, a motor shaft, a first bearing and a second bearing; the rotor is fixedly connected with a motor shaft; the inner ring of the first bearing is fixed with the stator, and the outer ring of the first bearing is fixed with the rotor; the inner ring of the second bearing is fixed with the motor shaft, and the outer ring of the second bearing is fixed with the stator. In the motor structure in the scheme, when a motor rotor is stressed, the rotor is supported by the outer ring of the first bearing, the inner ring of the first bearing transmits external force to the stator, external load of the motor is mainly born by the first bearing, and the second bearing and a motor shaft are only stressed by tensile force and extremely small torsion.

The further technical scheme is that the rotor is fixedly connected with the motor shaft in one of the integrated forming, threaded connection or close fit modes.

The utility model has the advantages that:

the utility model provides a pair of motor structure, when the electric motor rotor atress, by the outer lane support rotor of first bearing, the inner circle of first bearing passes external force to the stator, and the external load of motor mainly is undertaken by first bearing, and second bearing and motor shaft only receive pulling force and minimum torsion.

Drawings

FIG. 1 is a diagram: a schematic diagram of a motor structure.

FIG. 2 is a diagram of: a motor structure's parts decomposition schematic diagram.

In the figure:

1. a stator; 2. a rotor; 3. a motor shaft; 41. a first bearing; 42. a second bearing; 5. a magnet sleeve; 6. an encoder; 7. a motor winding; 8. a motor magnet; 9. a motor end cover; 11. a first clamping part; 12. a second clamping part; 13. a third clamping part; 14. and a fourth clamping part.

Detailed Description

The present invention will be described in detail with reference to fig. 1 to 2 and the embodiments, and features in the following embodiments and examples may be combined with each other without conflict.

As shown in fig. 1 to 2, the present embodiment provides a motor structure, which includes a stator 1, a rotor 2, a motor shaft 3, a first bearing 41, a second bearing 42, a magnet housing 5, an encoder 6, a motor winding 7, and a motor magnet 8; the motor shaft 3 and the rotor 2 are integrally formed, the first bearing 41 and the second bearing 42 are provided with an inner ring, an outer ring and balls between the inner ring and the outer ring, the first bearing 41 is sleeved on the stator 1, the inner ring of the first bearing 41 is fixed with the stator 1, the outer ring of the first bearing 41 is fixed with the rotor 2, the second bearing 42 is sleeved on the motor shaft 3, the inner ring of the second bearing 42 is fixed with the motor shaft 3, 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, the other end of the motor shaft is connected with the magnet sleeve 5, and the specific connection mode of the motor shaft 3 and the magnet sleeve 5 can be realized through tight fit, threads, gluing and the like; the magnet sleeve 5 is provided with an induction magnet, and the encoder 6 is in clearance fit with the induction magnet and used for detecting 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 the stator to generate a magnetic field, so that the rotor 2 rotates relative to the stator 1.

The assembly process of the motor is as follows: a motor winding 7 is assembled on the stator 1, and a motor magnet 8 matched with the stator is assembled on the inner wall of the rotor 2; the first bearing 41 is sleeved on the stator 1, an inner ring of the first bearing is fixed with the stator 1, and the stator 1 is provided with a first clamping part 11 which is used for being matched with the inner ring of the first bearing 41; the rotor 2 and the motor shaft 3 are integrally formed, and the motor shaft 3 is inserted into the stator 1 and is in clearance fit with the stator 1; at this time, the outer ring of the first bearing 41 is fixed with the rotor 2, and the rotor 2 is provided with a second detent portion 12 for matching with the outer ring of the first bearing 41, and the first detent portion 11 and the second detent portion 12 limit the first bearing 41; the second bearing 42 is sleeved at the other end of the motor shaft 3, the inner ring of the second bearing is fixed with the motor shaft 3, the outer ring of the second bearing is fixed with the stator 1, the stator 1 is provided with a third clamping part 13 which is used for being matched with the outer ring of the second bearing 42, the magnet sleeve 5 is connected with the motor shaft 3 through threads, the edge of the magnet sleeve 5 forms a fourth clamping part 14 which is used for being matched with the inner ring of the second bearing 42, and the third clamping part 13 and the fourth clamping part 14 realize the limiting of the second bearing 42; and finally, fixedly connecting the encoder 6 and the end cover 9 with the stator 1 through screws.

The above embodiment exemplarily shows the connection relationship between the motor shaft 3 and the rotor 2, and according to other embodiments and practical applications, the motor shaft 3 may also be connected to the rotor 2 by a threaded connection or a close fit, so as to realize the linkage between the motor shaft 3 and the rotor 2.

The utility model provides a pair of motor structure, when the 2 atress of rotor of motor, by the outer lane support rotor of first bearing 41, the inner circle of first bearing 41 passes external force to stator 1, and the external load of motor is mainly undertaken by first bearing 41, and second bearing 42 and motor shaft 3 only receive pulling force and minimum torsion.

Claims

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.