CN220107723U - Outer rotor motor with rotating shafts with two diameters - Google Patents

Abstract

The utility model discloses an outer rotor motor with two rotary shafts with two diameters, which relates to the technical field of motors and comprises a rotary shaft, a rotor, a shaft sleeve, a rotor cover, a circuit board and two bearings, wherein the rotary shaft is connected with the rotor cover; the rotating shaft is provided with a first end and a second end, the bearing is sleeved on the first end, the second end is used for being connected with a load, and the diameter of the first end is smaller than that of the second end; the inner diameter of the motor inner bearing can be kept to be smaller, the ball bearing can be a thick-wall bearing, the wear resistance is high, and the reliability is improved.

Description

Outer rotor motor with rotating shafts with two diameters

Technical Field

The utility model relates to the technical field of motors, in particular to an outer rotor motor with rotating shafts with two diameters.

Background

Motors are generally classified into an outer rotor motor and an inner rotor motor according to the relative positions of a rotor and a stator, wherein the outer rotor motor has the characteristics of space saving and compact design, and has been receiving more and more attention. An outer rotor motor generally includes a ring-shaped rotor core, an end cap fastened to an outer surface of the rotor core, a rotary shaft fixed to a center of the end cap, and the like.

The outer diameters of the front end of the rotating shaft of the existing outer rotor motor for connecting the motor component and the rear end for connecting the load are the same, for example, an outer rotor of a brushless motor with a patent number 201410164464.6, which discloses an end cover, a central shaft fixed to the rotating center of the end cover, and an annular rotor core, wherein the central shaft is a cylinder with the same outer diameter, and when the central shaft is connected with the load by the rear end, the inner diameter of the load is uncertain, when the central shaft is connected with the load by the rear end, the inner diameter of the rear end of the central shaft is larger, the outer diameter of the rear end of the central shaft needs to be set to be a larger outer diameter matched with the central shaft, and the inner diameter of a selected ball bearing needs to be larger, so that the ball bearing only adopts a thin-wall bearing, and is easy to wear and has low wear resistance in assembly and use.

Disclosure of Invention

The utility model discloses an outer rotor motor with rotating shafts with two diameters, which aims to solve the technical problem that a ball bearing is low in wear resistance when the motor is connected with a large-diameter load.

In order to solve the technical problems, the utility model provides the following optimization technical scheme:

the outer rotor motor comprises a rotating shaft, a rotor, a shaft sleeve, a rotor cover, a circuit board and two bearings, wherein the rotating shaft is connected with the rotor cover; the rotating shaft is provided with a first end and a second end, the bearing sleeve is sleeved on the first end, the second end is used for being connected with a load, and the diameter of the first end is smaller than that of the second end.

Further, the shaft sleeve comprises a first sleeve body and a second sleeve body, and the first sleeve body and the second sleeve body are of an integral structure; the circuit board is sleeved on the first sleeve body, and the rotor is sleeved on the second sleeve body.

Further, one end of the first sleeve body, which is far away from the second sleeve body, is provided with a flange, the side surface of the flange is uniformly provided with a plurality of clamping blocks, the center of the circuit board is provided with a through hole, the inner wall of the through hole is provided with a plurality of clamping grooves corresponding to the clamping blocks one by one, and the circuit board is matched with the clamping blocks through the clamping grooves and is sleeved on the first sleeve body.

Further, a clamping ring is arranged at the joint of the first sleeve body and the second sleeve body.

Further, the outer wall of the flange is provided with a protrusion, the protrusion is provided with a screw hole, and the circuit board is screwed into the screw hole through a bolt to be fixed on the protrusion.

Further, one end of the rotating shaft, which is far away from the rotor cover, is provided with a thread structure.

Compared with the prior art, the utility model has the following beneficial effects:

in the outer rotor motor with the rotating shaft with two diameters, the rotating shaft is provided with the first end and the second end, the bearing is sleeved on the first end, the second end is used for connecting a load, the diameter of the first end is smaller than that of the second end, when the rotating shaft is used for connecting a load with a larger inner diameter, the diameter of the second end of the rotating shaft is required to be set to be a larger diameter, but the first end of the rotating shaft is kept to be a smaller diameter, so that a ball bearing can be selected as a thick-wall bearing, the wear resistance is high, and the reliability is improved.

Drawings

Fig. 1 is a schematic overall structure of the present utility model.

Fig. 2 is a cross-sectional view of the overall structure of the present utility model.

Fig. 3 is a schematic structural view of a portion of the present utility model.

Fig. 4 is a schematic structural view of the sleeve of the present utility model.

Fig. 5 is a schematic structural view of the rotating shaft of the present utility model.

In the figure: 1. a rotating shaft; 2. a rotor; 3. a shaft sleeve; 4. a rotor cover; 5. a circuit board; 6. a bearing; 7. a shaft hole; 8. a first end; 9. a second end; 10. a first sleeve; 11. a second sleeve; 12. a flange; 13. a clamping block; 14. a clasp; 15. a protrusion; 16. a thread structure.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, an outer rotor 2 motor with a rotating shaft 1 with two diameters comprises a rotating shaft 1, a rotor 2, a shaft sleeve 3, a rotor cover 4, a circuit board 5 and two bearings 6, wherein the rotor 2 is used for winding coils, the rotating shaft 1 is connected with the rotor cover 4, the shaft sleeve 3 is provided with a shaft hole 7, the two bearings 6 are respectively fixed at the front end and the rear end of the shaft hole 7, and the circuit board 5 is sleeved on the shaft sleeve 3; the rotating shaft 1 is provided with a first end 8 and a second end 9, the bearing 6 is sleeved on the first end 8, the second end 9 is used for being connected with a load, and the diameter of the first end 8 is smaller than that of the second end 9. In the utility model, when the rotating shaft 1 is used for connecting a load with a larger inner diameter, the diameter of the second end 9 of the rotating shaft 1 needs to be set to be larger, but the first end 8 of the rotating shaft 1 is kept to be smaller, so that the ball bearing 6 can be a thick-wall bearing 6, the wear resistance is high, and the reliability is improved.

In this embodiment, the sleeve 3 includes a first sleeve body 10 and a second sleeve body 11, where the first sleeve body 10 and the second sleeve body 11 are in an integral structure, specifically, the outer diameter of the first sleeve body 10 is larger than that of the second sleeve body 11, and the first sleeve body 10 and the second sleeve body are respectively used for assembling the circuit board 5 and the rotor 2, and the circuit board 5 and the rotor 2 are orderly and regularly assembled separately, so as to prevent disorder of circuit arrangement and leakage; the circuit board 5 is sleeved on the first sleeve body 10, and the rotor 2 is sleeved on the second sleeve body 11.

In this embodiment, a flange 12 is provided at one end of the first sleeve body 10 away from the second sleeve body 11, a plurality of clamping blocks 13 are uniformly provided on a side surface of the flange 12, a through hole is provided in the center of the circuit board 5, a plurality of clamping grooves corresponding to the clamping blocks 13 one by one are provided on an inner wall of the through hole, and the circuit board 5 is matched with the clamping blocks 13 through the clamping grooves and is sleeved on the first sleeve body 10; the circuit board 5 is sleeved on the first sleeve body 10 for fixing, and the clamping blocks 13 play a role in preventing the circuit board 5 from rotating in the radial direction.

In this embodiment, a snap ring 14 is provided at the connection between the first sleeve 10 and the second sleeve 11, and the snap ring 14 serves to partition the first sleeve 10 and the second sleeve 11 in a region.

In this embodiment, the outer wall of the flange 12 is provided with a protrusion 15, the protrusion 15 is provided with a screw hole, and the circuit board 5 is fixed on the protrusion 15 by screwing the screw hole into the screw hole; as can be appreciated, the circuit board 5 is provided with holes matching with bolts which fix the circuit board 5 to the projections 15 through the side walls of the circuit board 5, thereby achieving a fixing effect.

In the present embodiment, the end of the shaft 1 remote from the rotor cover 4 is provided with a screw structure 16, and the screw structure 16 is used for connecting a load.

The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. The outer rotor motor comprises a rotating shaft, a rotor, a shaft sleeve, a rotor cover, a circuit board and two bearings, wherein the rotating shaft is connected with the rotor cover; the bearing sleeve is characterized in that the rotating shaft is provided with a first end and a second end, the bearing sleeve is sleeved on the first end, the second end is used for being connected with a load, and the diameter of the first end is smaller than that of the second end.

2. The external rotor motor with two diameters of rotating shafts according to claim 1, wherein the shaft sleeve comprises a first sleeve body and a second sleeve body, and the first sleeve body and the second sleeve body are of an integral structure; the circuit board is sleeved on the first sleeve body, and the rotor is sleeved on the second sleeve body.

3. The outer rotor motor with the rotating shaft with two diameters according to claim 2, wherein a flange is arranged at one end, far away from the second sleeve, of the first sleeve, a plurality of clamping blocks are uniformly arranged on the side face of the flange, a through hole is formed in the center of the circuit board, a plurality of clamping grooves in one-to-one correspondence with the clamping blocks are formed in the inner wall of the through hole, and the circuit board is matched with the clamping blocks through the clamping grooves and sleeved on the first sleeve.

4. The external rotor motor with two diameters of rotating shafts according to claim 2, wherein a clamping ring is arranged at the joint of the first sleeve body and the second sleeve body.

5. An outer rotor motor with a rotating shaft with two diameters according to claim 3, wherein the outer wall of the flange is provided with a protrusion, the protrusion is provided with a screw hole, and the circuit board is fixed on the protrusion by screwing the circuit board into the screw hole.

6. An external rotor motor having a rotary shaft with two diameters according to claim 1, wherein an end of the rotary shaft remote from the rotor cover is provided with a screw structure.