CN210273722U

CN210273722U - Inner limiting structure of motor

Info

Publication number: CN210273722U
Application number: CN201921093410.XU
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: 2020-04-07
Anticipated expiration: 2029-07-12

Abstract

The utility model discloses an inner limit structure of a motor, which comprises a stator, a rotor and a motor shaft, wherein the motor shaft is fixedly connected with the rotor; the outer ring of motor shaft is equipped with first spacing arch, the inner ring of stator is equipped with the spacing arch of second with first spacing protruding matched with. The utility model discloses an interior limit structure of motor, with interior limit structure arrange motor shaft lateral wall in on the mode, can increase the stress surface of spacing portion to improve limit structure's rigidity.

Description

Inner limiting structure of motor

Technical Field

The utility model relates to an electric machine structure especially relates to an interior limit structure of motor.

Background

The current motor is used for shooing stabilizer or cloud platform field, and in order to prevent the wire rod winding that the motor rotation leads to, there are mainly two methods: 1. a slip ring line is arranged in the motor; 2. a limit structure is arranged between a stator and a rotor of the motor. However, the use of slip ring lines increases the production cost of the product, and because the bearing installation mode of the existing motor is generally that the motor shaft is supported by the inner rings of two bearings, the top end of the motor shaft is also provided with a magnet, the bottom end of the motor shaft is fixed with the rotor, the assembly of the structure needs the limiting part to be arranged on the end surface of the motor shaft or the stator, the size requirement on the limiting part is strict, the rigidity of the limiting structure can be influenced if the size is small, and the size of the motor needs to be correspondingly increased if the size is large.

In the prior art, chinese patent CN207719922U discloses a limiting structure of a plastic handheld pan/tilt motor, which includes a circuit board, a motor bottom cover, a hollow shaft, a motor head cover, a magnet and a coil; the coil is mounted on the motor bottom cover; the motor bottom cover is arranged on the hollow shaft through a bearing; the circuit board is arranged between the coil and the motor bottom cover; the magnet is arranged in the motor head cover and arranged outside the coil; the motor bottom cover is provided with a first limiting part, the hollow shaft is provided with a second limiting part, and the hollow shaft is embedded and installed on the motor head cover; the motor head cover is rotatable for the motor bottom cover, and the motor head cover drives after rotating the hollow shaft is rotatory, works as when first spacing portion contacts with the spacing portion of second, the motor head cover with the motor bottom produces spacingly. The first limiting part in the limiting structure is arranged on the end face of the stator, the rigidity of the first limiting part of the structure is poor, and the first limiting part is easy to damage after being used for a long time, particularly when the load is heavy. Chinese patent CN204190547U discloses a motor with a limiting device inside, wherein a stator of the motor is provided with a limiting point a parallel to the axis, a rotor is provided with a limiting point B perpendicular to the axis, the limiting point a and the limiting point B are cuboids, the length of the limiting point a and the length of the limiting point B are the same, but the width and the height of the cuboid of the limiting point a are slightly larger than the limiting point B. The limiting structure requires strict requirements on the size of the limiting part.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides an interior limit structure of motor aims at solving the poor or great scheduling problem of motor size of current interior limit structure of motor rigidity.

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

an inner limiting structure of a motor comprises a stator, a rotor and a motor shaft, wherein the motor shaft is fixedly connected with the rotor; the outer ring of motor shaft is equipped with first spacing arch, and the inner ring of stator is equipped with the spacing arch of second with first spacing protruding matched with. According to the technical scheme, a first limiting bulge is arranged on the side face of a motor shaft and serves as a limiting point on a rotor shaft, a stator limiting point, namely a second limiting bulge, is arranged on the inner wall of a stator around the motor shaft and matched with the first limiting bulge, and the spatial position of the second limiting bulge is located on the track of the first limiting bulge rotating along with the motor shaft in the assembled motor; the structure of this scheme is with interior limit structure place motor shaft lateral wall on the mode, can increase the stress surface of spacing portion to improve limit structure's rigidity.

The motor further comprises a first bearing and a second bearing, wherein 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 first limiting bulge is positioned between the first bearing and the second bearing. The cooperation mode of above-mentioned motor shaft and bearing for the interior limit structure of this scheme does not influence the assembly of motor, and when the electric motor rotor atress, supports the rotor by the outer lane of first bearing, and the inner circle of first bearing passes external force to the stator, and the external load of motor is mainly undertaken by first bearing, and second bearing and motor shaft only receive pulling force and minimum torsion.

The motor further comprises a first bearing and a second bearing, wherein the inner rings of the first bearing and the second bearing are respectively fixed with the motor shaft, and the outer rings of the first bearing and the second bearing are respectively fixed with the stator; wherein, the outer diameter of one end of the motor shaft close to the rotor is larger than that of the other end; the first limiting bulge is positioned between the first bearing and the second bearing. The matching mode of the motor shaft and the bearing ensures that the inner limiting structure does not influence the assembly of the motor.

The utility model has the advantages that:

the utility model provides a pair of interior limit structure of motor sets up first spacing arch as the epaxial limit point of rotor in the motor shaft side, on the stator around on the inner wall of motor shaft with first spacing arch matched with set up stator limit point, the spacing arch of second promptly, with interior limit structure arrange the motor shaft lateral wall in on the mode, can increase the stress surface of spacing portion to improve limit structure's rigidity.

Drawings

FIG. 1 is a diagram: the utility model relates to an interior limit structure's of motor parts decomposition schematic diagram.

FIG. 2 is a diagram of: an interior limit structure's of motor schematic diagram.

In the figure:

1. a stator; 2. a rotor; 3. a motor shaft; 41. a first limit protrusion; 42. a second limit bulge; 51. a first bearing; 52. a second bearing; 5. a magnet sleeve; 6. a magnet sleeve; 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 an internal limiting structure of a motor, which includes a stator 1, a rotor 2, a motor shaft 3, a first bearing 51, a second bearing 52, a magnet sleeve 6, an encoder, a motor winding 7, and a motor magnet 8; the motor shaft 3 and the rotor 2 are integrally formed, the first bearing 51 and the second bearing 52 are provided with an inner ring, an outer ring and balls between the inner ring and the outer ring, the first bearing 51 is sleeved on the stator 1, the inner ring of the first bearing 51 is fixed with the stator 1, the outer ring of the first bearing 51 is fixed with the rotor 2, the second bearing 52 is sleeved on the motor shaft 3, the inner ring of the second bearing 52 is fixed with the motor shaft 3, and the outer ring of the second bearing 52 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 6, and the specific connection mode of the magnet sleeve 6 and the motor shaft 3 can be realized through tight fit, threads, gluing and the like; the magnet sleeve 6 is provided with an induction magnet, and the encoder 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;

specific interior limit structure includes: a first limiting bulge 41 positioned on the outer ring of the motor shaft 3 (namely the outer side of the side wall of the motor shaft 3), a second limiting bulge 42 positioned between the first bearing 51 and the second bearing 52 and positioned on the inner ring of the stator 1 and matched with the first limiting bulge 41, wherein the spatial position of the second limiting bulge 42 is positioned on the track of the first limiting bulge 41 rotating along with the motor shaft 3; when the first limiting bulge 41 rotates to the second limiting bulge 42, the second limiting bulge 42 limits the motor shaft 3 with the first limiting bulge 41 to continue rotating, so that a wire positioned in the motor shaft 3 can be prevented from being wound; meanwhile, in the motor structure of the embodiment, the inner limiting structure is arranged on the side wall of the motor shaft 3, so that the stress surface of the first limiting protrusion 41 can be enlarged, and the rigidity of the limiting structure is improved; when the motor rotor 2 is stressed, the rotor 2 is supported by the outer ring of the first bearing 51, the outer ring of the first bearing 51 transmits external force to the stator 1, the external load of the motor is mainly borne by the first bearing 51, and the second bearing 52 and the motor shaft 3 are only stressed by tension and extremely small torsion.

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 51 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 matching with the inner ring of the first bearing 51; 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 51 is fixed with the rotor 2, the rotor 2 is provided with a second positioning portion 12 for matching with the outer ring of the first bearing 51, and the first positioning portion 11 and the second positioning portion 12 limit the first bearing 51; the second bearing 52 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 52, the magnet sleeve 6 is connected with the motor shaft 3 through threads, a fourth clamping part 14 is formed at the edge of the magnet sleeve 6 and is used for being matched with the inner ring of the second bearing 52, and the third clamping part 13 and the fourth clamping part 14 limit the second bearing 52; and finally, fixedly connecting the encoder and the end cover 9 with the stator 1 through screws. Because the spatial position of the second limiting protrusion 42 is located on the track of the first limiting protrusion 41 rotating along with the motor shaft 3, when the first limiting protrusion 41 rotates to the second limiting protrusion 42 in the rotating process of the assembled motor, the second limiting protrusion 42 limits the motor shaft 3 with the first limiting protrusion 41 to continue rotating, and the wire rod located inside the motor shaft 3 can be prevented from being wound.

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 above embodiment exemplarily shows the position relationship of the fourth detent portion 14, and according to other embodiments and practical applications, the fourth detent portion 14 may also be located on the motor shaft 3.

In another embodiment, the motor comprises a stator 1, a rotor 2, a motor shaft 3, a first bearing 51, a second bearing 52, a magnet sleeve 6, an encoder, a motor winding 7 and a motor magnet 8; the motor shaft 3 is tightly matched with the rotor 2, the outer diameter of one end, close to the rotor 2, of the motor shaft 3 is larger than that of the other end of the motor shaft, the inner rings of the first bearing 51 and the second bearing 52 are respectively fixed with the motor shaft 3, the outer rings of the first bearing 51 and the second bearing 52 are respectively fixed with the stator 1, and namely the outer diameter of the motor shaft 3 sleeved with one end of the first bearing 51 is larger than that of the motor shaft 3 sleeved with one end of the; one end of the motor shaft 3 is tightly matched with the rotor 2, the other end of the motor shaft is connected with the magnet sleeve 6, and the specific connection mode of the magnet sleeve 6 and the motor shaft 3 can be realized through tight fit, threads, gluing and the like; the magnet sleeve 6 is provided with an induction magnet, and the encoder 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 motor shaft 3 is provided with a clamping part matched with inner rings of the first bearing 51 and the second bearing 52, the stator 1 is provided with a clamping part matched with outer rings of the first bearing 51 and the second bearing 52, and the clamping parts on the motor shaft 3 and the stator 1 limit axial movement of the first bearing 51 and the second bearing 52.

Specific interior limit structure includes: a first limiting bulge 41 positioned on the outer ring of the motor shaft 3 (namely the outer side of the side wall of the motor shaft 3), a second limiting bulge 42 positioned between the first bearing 51 and the second bearing 52 and positioned on the inner ring of the stator 1 and matched with the first limiting bulge 41, wherein the spatial position of the second limiting bulge 42 is positioned on the track of the first limiting bulge 41 rotating along with the motor shaft 3; when the first limiting bulge 41 rotates to the second limiting bulge 42, the second limiting bulge 42 limits the motor shaft 3 with the first limiting bulge 41 to continue rotating, so that a wire positioned in the motor shaft 3 can be prevented from being wound; meanwhile, in the motor structure of the embodiment, the inner limiting structure is arranged on the side wall of the motor shaft 3, so that the stress surface of the first limiting protrusion 41 can be enlarged, and the rigidity of the limiting structure is improved; in addition, because the outer diameter of the end of the motor shaft 3 close to the rotor 2 is larger in this embodiment, the first limiting protrusion 41 does not affect the sleeving of the first bearing 51 on the motor shaft 3.

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 an integral molding, so as to realize the linkage between the motor shaft 3 and the rotor 2.

The above embodiment exemplarily shows the position relationship of the detent portion engaged with the inner ring of the first bearing 51, and the detent portion may be located on the edge of the magnet sleeve 6 according to other embodiments and practical applications.

The utility model provides a pair of interior limit structure of motor sets up first spacing arch 41 as rotor shaft epaxial limit point to 3 sides of motor shaft, on stator 1 around motor shaft 3's the inner wall on with first spacing arch 41 matched with set up stator limit point, the spacing arch 42 of second promptly, with interior limit structure arrange 3 lateral walls of motor shaft on the mode, can increase the stress surface of spacing portion to improve limit structure's rigidity.

Claims

1. An inner limiting structure of a motor comprises a stator (1), a rotor (2) and a motor shaft (3), wherein the motor shaft (3) is fixedly connected with the rotor (2); the motor is characterized in that a first limiting protrusion (41) is arranged on the outer ring of the motor shaft (3), and a second limiting protrusion (42) matched with the first limiting protrusion (41) is arranged on the inner ring of the stator (1).

2. The inner limit structure of the motor according to claim 1, further comprising a first bearing (51) and a second bearing (52), wherein an inner ring of the first bearing (51) is fixed with the stator (1), and an outer ring of the first bearing is fixed with the rotor (2); the inner ring of the second bearing (52) is fixed with the motor shaft (3), and the outer ring of the second bearing is fixed with the stator (1); the first limiting protrusion (41) is positioned between the first bearing (51) and the second bearing (52).

3. The inner limit structure of the motor according to claim 1, wherein the motor further comprises a first bearing (51) and a second bearing (52), inner rings of the first bearing (51) and the second bearing (52) are respectively fixed with the motor shaft (3), and outer rings of the first bearing (51) and the second bearing (52) are respectively fixed with the stator (1); wherein, the outer diameter of one end of the motor shaft (3) close to the rotor (2) is larger than that of the other end; the first limiting protrusion (41) is positioned between the first bearing (51) and the second bearing (52).