CN217159401U

CN217159401U - External rotor motor

Info

Publication number: CN217159401U
Application number: CN202220434228.1U
Authority: CN
Inventors: 李发胜
Original assignee: Hubei Queen Ocean Electrical Appliance Manufacture Co Ltd
Current assignee: Hubei Queen Ocean Electrical Appliance Manufacture Co Ltd
Priority date: 2022-03-02
Filing date: 2022-03-02
Publication date: 2022-08-09
Anticipated expiration: 2032-03-02

Abstract

The utility model discloses an external rotor electric machine, including base, external rotor assembly, pivot and stator module, external rotor assembly couples together with the pivot installation, and the base includes the bottom plate and goes up convex sleeve in the middle of the top surface from the bottom plate, and telescopic top and bottom are equipped with first bearing room and second bearing room respectively, install first bearing and second bearing in first bearing room and the second bearing room respectively, and the stator module suit is outside the sleeve, and external rotor assembly suit is outside stator module, its characterized in that: be provided with first jump ring on the inside wall of second bearing chamber, the outside bottom surface of second bearing supports and leans on first jump ring, can effectively compensate the virtual position of installation that exists between second bearing chamber and the second bearing, and positioning effect is good, prevents that the second bearing from axial float in the second bearing chamber, can protect the bearing better, the life of extension motor.

Description

External rotor motor

The technical field is as follows:

the utility model relates to an external rotor electric machine.

Background art:

the existing external rotor motor comprises a base, an external rotor component, a rotating shaft and a stator component, wherein the external rotor component is connected with the rotating shaft in an installing way, the stator component is sleeved in the external rotor component, the external rotor component comprises a rotor shell and a plurality of magnetic shoes, the rotor shell comprises an end plate and a first sleeve axially protruding from the edge of the end plate, the magnetic shoes are arranged on the inner wall of the first sleeve, the base comprises a bottom plate and a second sleeve protruding upwards from the middle of the top surface of the bottom plate, bearing chambers are respectively arranged at two ends of the second sleeve, a bearing is arranged in each bearing chamber, the rotating shaft is supported on the bearing, according to the installing mode of the external rotor motor, the bearing and the corresponding bearing chamber have certain virtual positions, and in order to prevent the motor from axial movement caused by the virtual positions of the bearing and the corresponding bearing chamber when the motor works, a wave washer is generally arranged between the bearing and the bearing seat, the structure can only realize the horizontal installation mode of the motor or the downward installation mode of the motor with the outer rotor component; however, when the outer rotor assembly is installed upwards in the motor installation mode, because the gravity of the outer rotor assembly applies pressure to the bearing in the bearing chamber at the top of the second sleeve, and the axial positioning function is lacked between the bearing at the bottom and the bearing chamber, the bearing and the corresponding bearing chamber are positioned in a virtual position to cause axial movement, the motor is easily damaged, the service life of the motor is shortened, and various installation modes of the outer rotor motor cannot be met.

The invention content is as follows:

the utility model aims at providing an external rotor electric machine can solve the motor mounting means who installs up when the external rotor assembly among the prior art, because the gravity of external rotor assembly exerts pressure to the bearing in the bearing room at second sleeve top, lacks the axial positioning function between the bearing of bottom and the bearing room, can make the bearing have the virtual position with the bearing room that corresponds and cause the axial float, damage the motor easily, shorten the life of motor, can not satisfy external rotor electric machine's multiple mounting means's technical problem.

The purpose of the utility model is realized by the following technical scheme.

The utility model aims at providing an external rotor electric machine, including base, external rotor assembly, pivot and stator module, external rotor assembly couples together with the pivot installation, and the base includes the bottom plate and goes up convex sleeve in the middle of the top surface from the bottom plate, and telescopic top and bottom are equipped with first bearing room and second bearing room respectively, install first bearing and second bearing in first bearing room and the second bearing room respectively, and the stator module suit is outside the sleeve, and external rotor assembly suit is outside stator module, its characterized in that: and a first clamp spring is arranged on the inner side wall of the second bearing chamber, and the bottom surface of the outer side of the second bearing abuts against the first clamp spring.

A first annular clamping groove is formed in the inner side wall of the second bearing chamber, and the first clamping spring is clamped in the first annular clamping groove.

And a second clamp spring and a third clamp spring are arranged on the outer surface of the rotating shaft corresponding to the top surface and the bottom surface of the second bearing, the inner side bottom surface of the second bearing is abutted against the third clamp spring, and the second clamp spring is abutted against the inner side top surface of the second bearing.

And a second annular clamping groove and a third annular clamping groove are formed in the outer surface of the rotating shaft at positions corresponding to the top surface and the bottom surface of the second bearing, and the second clamping spring and the third clamping spring are clamped in the second annular clamping groove and the third annular clamping groove respectively.

A first insulating gasket is arranged between the inner bottom surface of the second bearing and the third clamp spring, and a second insulating gasket is arranged between the second clamp spring and the inner top surface of the second bearing.

The first bearing chamber is internally provided with a third bearing, the third bearing is arranged on the top surface of the first bearing, and the third bearing and the first bearing are mutually attached or arranged at intervals.

The bottom surface of the first bearing is provided with a wave washer, a first annular insulating layer is arranged between the first bearing and the rotating shaft, a third bearing and the rotating shaft, and a second annular insulating layer is arranged between the second bearing and the rotating shaft.

The outer rotor assembly comprises a casing sleeve and a plurality of permanent magnets arranged on the inner wall surface of the casing sleeve, the rotating shaft is connected with the casing sleeve through a shaft sleeve in an installing mode, and the bottom end face of the shaft sleeve is pressed on the top face of the inner side of the third bearing.

And a third insulating gasket is arranged between the bottom end surface of the shaft sleeve and the top surface of the inner side of the third bearing.

The first bearing, the second bearing and the third bearing all adopt ball bearings.

Compared with the prior art, the utility model, following effect has:

1) the utility model provides an external rotor electric machine, includes base, external rotor component, pivot and stator module, and external rotor component couples together with the pivot installation, and the base includes the bottom plate and from the middle convex sleeve up of the top surface of bottom plate, and telescopic top and bottom are equipped with first bearing room and second bearing room respectively, install first bearing and second bearing in first bearing room and the second bearing room respectively, and the stator module suit is outside the sleeve, and external rotor component suit is outside stator module, its characterized in that: be provided with first jump ring on the inside wall of second bearing chamber, the outside bottom surface of second bearing supports and leans on first jump ring, can effectively compensate the virtual position of installation that exists between second bearing chamber and the second bearing, and positioning effect is good, prevents that the second bearing from axial float in the second bearing chamber, can protect the bearing better, the life of extension motor.

2) Other advantages of the present invention will be described in detail in the examples section.

Description of the drawings:

FIG. 1 is a cross-sectional view of the structure provided by the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is an enlarged view of a portion B of FIG. 1;

fig. 4 is a schematic structural view of a stator assembly and a base provided by the present invention;

fig. 5 is a schematic structural view of the outer rotor assembly and the rotating shaft provided by the present invention.

The specific implementation mode is as follows:

the present invention will be described in further detail with reference to the following detailed description of preferred embodiments and accompanying drawings.

The first embodiment is as follows:

as shown in fig. 1 to 5, the embodiment provides an external rotor motor, including base 1, external rotor component 2, spindle 3 and stator module 4, external rotor component 2 is connected with spindle 3 installation, base 1 includes bottom plate 11 and upwards convex sleeve 12 from the middle of the top surface of bottom plate 11, the top and the bottom of sleeve 12 are equipped with first bearing room 121 and second bearing room 122 respectively, install first bearing 5A and second bearing 5B in first bearing room 121 and the second bearing room 122 respectively, stator module 4 suit is outside sleeve 12, external rotor component 2 suit is outside stator module 4, its characterized in that: be provided with first jump ring 1221 on the inside wall of second bearing room 122, the outside bottom surface of second bearing 5B supports and leans on first jump ring 1221, can effectively compensate the installation virtual position that exists between second bearing room and the second bearing, and positioning effect is good, prevents that the second bearing from moving in the second bearing room axial float, can protect the bearing better, the life of extension motor.

The inner side wall of the second bearing chamber 122 is provided with a first ring-shaped clamping groove 1222, and the first clamping spring 1221 is clamped in the first ring-shaped clamping groove 1222. The installation structure is simple, and the positioning effect is good.

The above-mentioned position that corresponds second bearing 5B's top surface and bottom surface on the surface of pivot 3 is provided with second jump ring 31 and third jump ring 32, the inboard bottom surface of second bearing 5B supports and leans on third jump ring 32, second jump ring 31 roof pressure is at the inboard top surface of second bearing 5B, can be better carry out spacingly to second bearing 5B through increasing second jump ring 31 and third jump ring 32, make second bearing 5B under any circumstance and pivot, the relative position of axle chamber all is absolute, make the motor can realize multiple mounting means and also can not influence the bearing life-span.

A second ring-shaped clamping groove 33 and a third ring-shaped clamping groove 34 are arranged on the outer surface of the rotating shaft 3 corresponding to the top surface and the bottom surface of the second bearing 5B, and the second clamping spring 31 and the third clamping spring 32 are respectively clamped in the second ring-shaped clamping groove 33 and the third ring-shaped clamping groove 34. The mounting structure is simple, and the positioning effect is good.

A first insulating spacer 8A is disposed between the inner bottom surface of the second bearing 5B and the third snap spring 32, and a second insulating spacer 8B is disposed between the second snap spring 31 and the inner top surface of the second bearing 5B. The current can be effectively prevented from flowing to cause the second bearing 5B to generate electric corrosion.

Still install third bearing 5C in foretell first bearing room 121, third bearing 5C locates on first bearing 5A's the top surface, and third bearing 5C laminates or is the interval setting with first bearing 5A each other, and when the installation of outer rotor assembly up, the load of the bearing at top can effectively be reduced, is favorable to prolonging bearing life.

The bottom surface of the first bearing 5A is provided with a wave washer 6, a first annular insulating layer 7A is arranged between the first bearing 5A and the rotating shaft 3, a third bearing 5C and the rotating shaft 3, and a second annular insulating layer 7B is arranged between the second bearing 5B and the rotating shaft 3. It is possible to reduce the electric erosion of the first bearing 5A and the third bearing 5C, thereby ensuring the life of the first bearing 5A and the third bearing 5C.

The outer rotor assembly 2 comprises a casing sleeve 21 and a plurality of permanent magnets 22 arranged on the inner wall surface of the casing sleeve 21, the rotating shaft 3 is connected with the casing sleeve 21 through a shaft sleeve 9, and the bottom end surface of the shaft sleeve 9 is pressed on the top surface of the inner side of the third bearing 5C.

The third insulating spacer 8C is provided between the bottom end surface of the sleeve 9 and the inner top surface of the third bearing 5C, so that the electric corrosion of the first bearing 5A and the third bearing 5C can be reduced, and the service life of the first bearing 5A and the third bearing 5C can be ensured.

The first bearing 5A, the second bearing 5B and the third bearing 5C are all ball bearings, each ball bearing generally comprises an inner ring, an outer ring and a plurality of balls arranged between the inner ring and the outer ring, the bottom surface of the outer ring of the second bearing 5B is abutted against the first snap spring 1221, the bottom surface of the inner ring of the second bearing 5B is abutted against the third snap spring 32, and the second snap spring 31 is abutted against the top surface of the inner ring of the second bearing 5B. The bottom end face of the shaft sleeve 9 is pressed on the top face of the inner ring of the third bearing 5C.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent replacement modes, and are all included in the scope of the present invention.

Claims

1. The utility model provides an external rotor electric machine, including base (1), external rotor subassembly (2), pivot (3) and stator module (4), external rotor subassembly (2) are connected with pivot (3) installation, base (1) include bottom plate (11) and from going up convex sleeve (12) in the middle of the top surface of bottom plate (11), the top and the bottom of sleeve (12) are equipped with first bearing room (121) and second bearing room (122) respectively, install first bearing (5A) and second bearing (5B) in first bearing room (121) and second bearing room (122) respectively, stator module (4) suit is outside sleeve (12), external rotor subassembly (2) suit is outside stator module (4), its characterized in that: be provided with first jump ring (1221) on the inside wall of second bearing room (122), the outside bottom surface of second bearing (5B) supports and leans on first jump ring (1221).

2. The external rotor electric machine according to claim 1, wherein: a first ring clamping groove (1222) is formed in the inner side wall of the second bearing chamber (122), and a first clamping spring (1221) is clamped in the first ring clamping groove (1222).

3. The external rotor electric machine according to claim 1 or 2, wherein: and a second clamp spring (31) and a third clamp spring (32) are arranged on the outer surface of the rotating shaft (3) at positions corresponding to the top surface and the bottom surface of the second bearing (5B), the inner side bottom surface of the second bearing (5B) is abutted against the third clamp spring (32), and the second clamp spring (31) is abutted against the inner side top surface of the second bearing (5B).

4. The external rotor electric machine according to claim 3, wherein: and a second annular clamping groove (33) and a third annular clamping groove (34) are formed in the outer surface of the rotating shaft (3) and correspond to the top surface and the bottom surface of the second bearing (5B), and the second clamping spring (31) and the third clamping spring (32) are respectively clamped in the second annular clamping groove (33) and the third annular clamping groove (34).

5. The external rotor electric machine according to claim 4, wherein: a first insulating gasket (8A) is arranged between the inner bottom surface of the second bearing (5B) and the third clamp spring (32), and a second insulating gasket (8B) is arranged between the second clamp spring (31) and the inner top surface of the second bearing (5B).

6. The external rotor electric machine according to claim 5, wherein: still install third bearing (5C) in first bearing room (121), on third bearing (5C) located the top surface of first bearing (5A), third bearing (5C) and first bearing (5A) laminated each other or be the interval setting.

7. The external rotor electric machine according to claim 5, wherein: the bottom surface of first bearing (5A) is provided with wave washer (6), is equipped with first annular insulating layer (7A) between first bearing (5A) and third bearing (5C) and pivot (3), is equipped with second annular insulating layer (7B) between second bearing (5B) and pivot (3).

8. The external rotor electric machine according to claim 7, wherein: the outer rotor assembly (2) comprises a casing sleeve (21) and a plurality of permanent magnets (22) arranged on the inner wall surface of the casing sleeve (21), the rotating shaft (3) is connected with the casing sleeve (21) through a shaft sleeve (9), and the bottom end surface of the shaft sleeve (9) is pressed on the top surface of the inner side of the third bearing (5C).

9. The external rotor electric machine according to claim 8, wherein: a third insulating gasket (8C) is arranged between the bottom end surface of the shaft sleeve (9) and the top surface of the inner side of the third bearing (5C).

10. The external rotor electric machine according to claim 8, wherein: the first bearing (5A), the second bearing (5B) and the third bearing (5C) are all ball bearings.