CN221408556U - Hollow cup motor - Google Patents

Abstract

The utility model discloses a hollow cup motor, which comprises a shell, a rotor assembly and a stator assembly, wherein a stator iron core is fixed on the inner side wall of the shell, the rotor assembly comprises a rotating shaft, magnetic shoes and a sleeve which are arranged from inside to outside, shaft sleeves which are stopped against the magnetic shoes are arranged at two ends of the sleeve, the rotating shaft, the magnetic shoes, the sleeve and the shaft sleeves are of an integrated structure, the stator assembly is arranged in the shell, the stator assembly is positioned on the radial outer side of the rotor assembly, and the stator assembly is coated with plastic package. The hollow cup motor can avoid the phenomenon that the rotor assembly rubs and scrapes with the internal magnetic steel or the shell due to centrifugal force under the overload condition, and prolongs the service time of the hollow cup motor under the overload condition.

Description

Hollow cup motor

Technical Field

The utility model relates to the technical field of hollow cup motors, in particular to a hollow cup motor.

Background

The hollow cup motor is a high-efficiency energy conversion device, belongs to direct current, permanent magnet and servo micro-special motors, and has outstanding energy-saving characteristics, sensitive and convenient control characteristics and stable operation characteristics.

In the practical use process, the hollow cup motor can be used in an overload way in a short time, so that in order to reduce the volume and the weight of equipment (one piece of equipment usually comprises a plurality of motors), the motor can be allowed to be used in an overload way in a short time for equipment with strictly limited space and weight and not long running time, so that a smaller motor is selected, and the overall weight of the equipment is reduced.

However, when the existing hollow cup motor is used under the overload condition, the current is large, the heating value is large, and under the high-rotation-speed condition, the motor rotor is rubbed and rubbed with the magnetic steel inside or the outer shell due to the centrifugal force, so that the motor is easy to damage.

Therefore, how to adapt the rotor of the coreless motor to the overload condition and to prolong the service time of the coreless motor under the overload condition is a problem to be solved by those skilled in the art.

Disclosure of utility model

The utility model aims to provide a hollow cup motor, which can avoid the phenomenon that a rotor assembly rubs against magnetic steel or a shell inside the hollow cup motor due to centrifugal force under an overload condition, and prolong the service time of the hollow cup motor under the overload condition.

In order to achieve the technical effects, the technical scheme of the utility model is as follows:

The utility model discloses a hollow cup motor, comprising: the stator core is fixed on the inner side wall of the shell; the rotor assembly comprises a rotating shaft, a magnetic shoe and a sleeve pipe which are arranged from inside to outside, wherein shaft sleeves which are stopped against the magnetic shoe are arranged at two ends of the sleeve pipe, and the rotating shaft, the magnetic shoe, the sleeve pipe and the shaft sleeves are of an integrated structure; the stator assembly is arranged in the shell, and is positioned on the radial outer side of the rotor assembly, and the stator assembly is coated with plastic package.

In some embodiments, the housing comprises: the two ends of the shell are opened; the flange end cover is matched with one end of the shell, and the flange end cover is provided with a shaft hole for the rotating shaft to penetrate out; and the sealing cover is matched with the other end of the shell.

In some specific embodiments, the flange end cap is threadably connected to the housing and the flange end cap is welded to the housing; the cover is welded with the shell.

In some specific embodiments, the shaft hole is internally matched with a first bearing sleeved on the rotating shaft; the sealing cover is provided with a bearing hole, one end of the rotating shaft, which is far away from the flange end cover, stretches into the bearing hole, and a second bearing sleeved on the rotating shaft is matched in the bearing hole.

In some more specific embodiments, the hollow cup motor further includes an elastic member, the elastic member is sleeved on the rotating shaft, one end of the elastic member is abutted against the first bearing, and the other end of the elastic member is abutted against the shaft sleeve.

In some alternative embodiments, two ends of the rotating shaft are respectively provided with a clamping groove, the clamping grooves are used for accommodating shaft clamping rings, and the two shaft clamping rings are respectively used for stopping the first bearing and the second bearing.

In some specific embodiments, the cover is provided with an outlet channel extending along the circumferential direction of the cover, and the outlet channel forms an outlet hole on the outer circumferential surface of the cover.

In some embodiments, both of the shaft sleeves are welded to the shaft, and both of the shaft sleeves are welded to the sleeve.

In some embodiments, the inner side wall of the magnetic shoe is bonded to the outer side wall of the shaft, and the outer side wall of the magnetic shoe is bonded to the sleeve.

In some embodiments, the stator assembly includes: the stator wire cup is sleeved on the rotor assembly and has a gap with the sleeve; the circuit board is connected to the stator wire cup, the wire head of the stator wire cup is welded with the circuit board, and the connection strength is increased through dispensing.

The hollow cup motor has the beneficial effects that: because the rotor subassembly includes from interior pivot, magnetic shoe and the sleeve pipe that sets up outward, sheathed tube both ends are equipped with and end in the axle sleeve of magnetic shoe, pivot, magnetic shoe, sleeve pipe and axle sleeve are integrated into one piece structure, and the intensity of rotor subassembly is great, can avoid under overload condition, the phenomenon that the rotor subassembly softened to take place betterly. Meanwhile, in the radial direction, the shell is arranged at the outermost side, then the stator core, the stator assembly coated with plastic package and the rotor assembly formed into an integrated structure are sequentially arranged, even under the centrifugal effect generated by a higher rotating speed, the magnetic shoe can not directly rub with the rotor assembly, and the rotor assembly can not directly rub with the stator core, so that the magnetic shoe, the stator core and the rotor assembly can be well protected, and the service time of the hollow cup motor under an overload condition can be prolonged.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

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

FIG. 2 is a cross-sectional view of a coreless motor in accordance with an embodiment of the present utility model;

FIG. 3 is a schematic structural view of a rotor assembly according to an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a rotor assembly of an embodiment of the present utility model;

FIG. 5 is a schematic structural view of a stator assembly according to an embodiment of the present utility model;

fig. 6 is a schematic structural view of a closure according to an embodiment of the present utility model.

Reference numerals:

100. A housing; 110. a housing; 120. a flange end cap; 121. a shaft hole; 130. a cover; 131. a bearing hole; 132. an outgoing line channel; 133. a wire outlet hole;

200. A stator core;

300. A rotor assembly; 310. a rotating shaft; 311. a clamping groove; 320. a magnetic shoe; 330. a sleeve; 340. a shaft sleeve;

400. a stator assembly; 410. a stator wire cup; 420. a circuit board;

500. A first bearing; 600. a second bearing; 700. an elastic member.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly, for distinguishing between the descriptive features, and not sequentially, and not lightly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The specific structure of the coreless motor according to the embodiment of the present utility model will be described with reference to fig. 1 to 6.

The utility model discloses a coreless motor, as shown in fig. 1 and 2, which comprises a shell 100, a rotor assembly 300 and a stator assembly 400, wherein a stator core 200 is fixed on the inner side wall of the shell 100, the rotor assembly 300 comprises a rotating shaft 310, a magnetic shoe 320 and a sleeve 330 which are arranged from inside to outside, two ends of the sleeve 330 are provided with shaft sleeves 340 which are stopped against the magnetic shoe 320, the rotating shaft 310, the magnetic shoe 320, the sleeve 330 and the shaft sleeves 340 are of an integrated structure, the stator assembly 400 is arranged in the shell 100, the stator assembly 400 is positioned on the radial outer side of the rotor assembly 300, and the stator assembly 400 is coated with plastic package.

It can be appreciated that, since the rotor assembly 300 includes the rotating shaft 310, the magnetic shoe 320 and the sleeve 330 which are arranged from inside to outside, the shaft sleeves 340 which are stopped against the magnetic shoe 320 are arranged at two ends of the sleeve 330, the rotating shaft 310, the magnetic shoe 320, the sleeve 330 and the shaft sleeves 340 are in an integrated structure, the strength of the rotor assembly 300 is high, and the phenomenon that the rotor assembly 300 is softened under overload condition can be well avoided. Meanwhile, in the radial direction, the housing 100 is located at the outermost side, and then sequentially comprises the stator core 200, the stator assembly 400 coated with plastic package and the rotor assembly 300 formed into an integrated structure, even under the centrifugal effect generated by a higher rotating speed, the magnetic shoe 320 cannot directly rub against the rotor assembly 300, and the rotor assembly 300 cannot directly rub against the stator core 200, so that the magnetic shoe 320, the stator core 200 and the rotor assembly 300 can be well protected, and the service time of the coreless motor under the overload condition can be prolonged.

In some embodiments, as shown in fig. 2, the housing 100 includes a casing 110, a flange cover 120 and a cover 130, two ends of the casing 110 are opened, the flange cover 120 is matched with one end of the casing 110, the flange cover 120 is provided with a shaft hole 121 through which the rotating shaft 310 passes, and the cover 130 is matched with the other end of the casing 110. It can be appreciated that the housing 100 is split into three parts, namely the housing 110, the flange end cover 120 and the cover 130, so that the assembly is convenient, and the sealing performance after the assembly is good.

In some specific embodiments, the flange cover 120 is screwed with the casing 110, and the flange cover 120 is welded with the casing 110; the cover 130 is welded to the cabinet 110. It will be appreciated that in the actual installation process, the stator core 200 is pressed into the casing 110, then is glued on the flange end cover 120 and screwed into the casing 110, and then is welded by laser, so that the connection stability and the connection tightness between the flange end cover 120 and the casing 110 can be ensured, the rotor assembly 300 with the assembled integrated structure is inserted into the casing 110 after the flange end cover 120 is connected, so that one end of the rotating shaft 310 penetrates out from the shaft hole 121, then the stator assembly 400 is inserted into the casing 110 to penetrate out the lead wire of the stator assembly 400, then is glued on the sealing cover 130 to be installed into the other end of the casing 110, and finally, the sealing cover 130 is connected with the casing 110 by laser welding, so that the connection stability and the connection tightness between the sealing cover 130 and the casing 110 can be ensured.

It should be noted that, in other embodiments of the present utility model, the connection modes of the casing 110, the flange cover 120 and the cover 130 may be selected according to actual needs, and are not limited to the above description.

In some specific embodiments, as shown in fig. 2, the shaft hole 121 is fitted with a first bearing 500 sleeved on the rotating shaft 310; the cover 130 has a bearing hole 131, one end of the rotating shaft 310 far away from the flange cover 120 extends into the bearing hole 131, and a second bearing 600 sleeved on the rotating shaft 310 is fitted in the bearing hole 131. It can be appreciated that the added first and second bearings 500 and 600 can ensure coaxiality of the stator assembly 400 and the rotor assembly 300, reduce mechanical loss, and also can stably support both ends of the rotating shaft 310, avoid a cantilever structure at one end of the rotating shaft 310, and facilitate the extension of the service life of the rotating shaft 310.

It should be added that, in the embodiment of the present utility model, the types of the first bearing 500 and the second bearing 600 may be selected according to actual needs, and the types and the number of the first bearing 500 and the second bearing 600 are not limited herein.

In some more specific embodiments, as shown in fig. 2, the hollow cup motor further includes an elastic member 700, the elastic member 700 is sleeved on the rotating shaft 310, one end of the elastic member 700 abuts against the first bearing 500, and the other end of the elastic member 700 abuts against the shaft sleeve 340. It can be appreciated that the added elastic member 700 can play a role in buffering during the actual assembly process, so as to avoid the occurrence of damage to the bearing and the shaft sleeve 340 due to rigid impact.

Optionally, in the embodiment of the present utility model, the elastic member may be selected according to actual needs, and may be a wave spring, or may be a structure such as an elastic pad, where the elastic member may be one or more, and the elastic member may be a rubber member or a metal member. The specific materials, types and numbers of the elastic members are not limited herein.

In some alternative embodiments, as shown in fig. 2, two ends of the rotating shaft 310 are respectively provided with a clamping groove 311, where the clamping groove 311 is used to accommodate a shaft collar (not shown), and the two shaft collars are used to stop the first bearing 500 and the second bearing 600 respectively. It will be appreciated that during the actual assembly process, the mounting of the shaft collar in the clamping groove 311 can prevent the first bearing 500 and the second bearing 600 from moving in the axial direction of the rotating shaft 310, thereby ensuring the reliability of the entire coreless motor.

It should be noted here that, in the actual design, the axial retainer ring and the clamping groove 311 may be set according to actual needs, one or two axial retainer rings and clamping grooves may be set, or no axial retainer ring and clamping groove may be set, and only the reliability of the hollow cup motor may be ensured.

In some specific embodiments, as shown in fig. 6, the cover 130 is provided with a wire outlet channel 132 extending along a circumferential direction thereof, and the wire outlet channel 132 forms a wire outlet hole 133 at an outer circumferential surface of the cover 130. It can be appreciated that, in the actual connection process, the outgoing line of the stator assembly 400 is led into the outgoing line channel 132 and then passes out of the outgoing line hole 133, so that on one hand, wiring is facilitated, and on the other hand, the outgoing line channel 132 is perpendicular to the outgoing line hole 133, so that a foreign matter blocking effect can be achieved, and a larger foreign matter is prevented from entering the housing 100.

In some embodiments, as shown in fig. 3-4, two sleeves 340 are welded to the rotating shaft 310, two sleeves 340 are welded to the sleeve 330, the inner side wall of the magnetic shoe 320 is bonded to the outer side wall of the rotating shaft 310, and the outer side wall of the magnetic shoe 320 is bonded to the sleeve 330. It will be appreciated that in the actual assembly process, one end of the shaft 310 is pressed into one of the sleeves 340, and is laser-welded with the sleeve 340, then the magnetic shoe 320 is bonded with the shaft 310, and then the other sleeve 340 is pressed into the shaft 310, and then is laser-welded, then the sleeve 330 is bonded with the magnetic shoe 320, and finally the sleeve 330 is laser-welded with the two sleeves 340. Therefore, on one hand, the connection strength between the components of the rotor assembly 300 is ensured, the magnetic shoe 320 is well protected, and on the other hand, the assembly of the rotor assembly 300 is facilitated, and the assembly efficiency of the coreless motor is improved.

Of course, it should be noted that, in other embodiments of the present utility model, the connection modes among the sleeve 340, the magnetic shoe 320, the rotating shaft 310 and the sleeve 330 may be selected according to actual needs, and are not limited to the connection modes of bonding and laser welding in this embodiment.

In some embodiments, as shown in fig. 5, the stator assembly 400 includes a stator wire cup 410 and a circuit board 420, the stator wire cup 410 is sleeved on the rotor assembly 300 and has a gap with the sleeve 330, the circuit board 420 is connected to the stator wire cup 410, the wire ends of the stator wire cup 410 are welded with the circuit board 420, and the connection strength is increased by dispensing. It can be appreciated that in the actual assembly process, the wire ends of the stator wire cup 410 are welded with the circuit board 420, then dispensing is performed to increase the strength, and finally the stator assembly 400 formed by welding the stator wire cup 410 with the circuit board 420 is packaged by a mold to form a plastic package coated on the outer sides of the stator wire cup 410 and the circuit board 420, so that the connection stability of the stator wire cup 410 and the circuit board 420 is ensured, and the stator wire cup 410 and the circuit board 420 can be prevented from directly rubbing against the stator core 200 or the rotor assembly 300, thereby being beneficial to prolonging the service time of the coreless motor under overload conditions.

Examples:

As shown in fig. 1-6, the coreless motor of the present embodiment includes a housing 100, a rotor assembly 300, and a stator assembly 400, wherein the housing 100 includes a casing 110, a flange cover 120, and a cover 130, both ends of the casing 110 are opened, the inner side wall is fixedly connected with a stator core 200, the flange cover 120 is connected to one end of the casing 110 through threads, and is welded to the casing 110, a shaft hole 121 through which a rotating shaft 310 passes is provided on the flange cover 120, the cover 130 is welded to the other end of the casing 110, and the cover 130 has a bearing hole 131. The cover 130 is provided with a wire outlet channel 132 extending along the circumferential direction thereof, and the wire outlet channel 132 forms a wire outlet hole 133 at the outer circumferential surface of the cover 130. The rotor assembly 300 includes a rotating shaft 310, a magnetic shoe 320, a sleeve 330, and a sleeve 340, wherein an inner sidewall of the magnetic shoe 320 is bonded to an outer sidewall of the rotating shaft 310, and an outer sidewall of the magnetic shoe 320 is bonded to the sleeve 330. The two shaft sleeves 340 are welded with the rotating shaft 310 and the sleeve 330, and the two shaft sleeves 340 are respectively stopped at two ends of the magnetic shoe 320. The shaft hole 121 is internally fitted with a first bearing 500 fitted around the rotation shaft 310, and the bearing hole 131 is internally fitted with a second bearing 600 fitted around the rotation shaft 310. The stator assembly 400 includes a stator wire cup 410 and a circuit board 420, the stator wire cup 410 is sleeved on the rotor assembly 300 and has a gap with the sleeve 330, the circuit board 420 is connected to the stator wire cup 410, the wire end of the stator wire cup 410 is welded with the circuit board 420, and the connection strength is increased by dispensing. The outer sides of the stator wire cup 410 and the circuit board 420 are covered with a plastic package by a mold. The leads on the circuit board 420 penetrate the outlet channel 132 and are led out through the outlet hole 133. The elastic member 700 is sleeved on the rotating shaft 310, one end of the elastic member 700 is abutted against the first bearing 500, and the other end of the elastic member 700 is abutted against the shaft sleeve 340.

The advantages of the hollow cup motor of this embodiment are as follows:

First: the rotating shaft 310, the magnetic shoe 320, the sleeve 330 and the shaft sleeve 340 are of an integrated structure, so that the strength of the rotor assembly 300 is high, and the phenomenon that the rotor assembly 300 is softened under an overload condition can be well avoided;

Second,: the sleeve 330 is arranged on the outer side of the magnetic shoe 320, the stator assembly 400 is coated with plastic package, even under the centrifugal effect generated by higher rotation speed, the magnetic shoe 320 cannot directly rub with the rotor assembly 300, and the rotor assembly 300 cannot directly rub with the stator iron core 200, so that the magnetic shoe 320, the stator iron core 200 and the rotor assembly 300 can be well protected, and the service time of the hollow cup motor under the overload condition can be prolonged;

Third,: the flange end cover 120 is in threaded connection with the shell 110, and the flange end cover 120 is welded with the shell 110; the cover 130 is welded to the casing 110, and the connection stability and the connection tightness of the flange cover 120, the casing 110, and the cover 130 are ensured.

In the description of the present specification, reference to the term "some embodiments," "other embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is merely exemplary of the present utility model, and those skilled in the art should not be considered as limiting the utility model, since modifications may be made in the specific embodiments and application scope of the utility model in light of the teachings of the present utility model.

Claims (10)

1. A coreless motor comprising:

A housing (100), wherein a stator core (200) is fixed to the inner side wall of the housing (100);

The rotor assembly (300) comprises a rotating shaft (310), magnetic shoes (320) and a sleeve (330) which are arranged from inside to outside, wherein shaft sleeves (340) which are stopped against the magnetic shoes (320) are arranged at two ends of the sleeve (330), and the rotating shaft (310), the magnetic shoes (320), the sleeve (330) and the shaft sleeves (340) are of an integrated structure;

The stator assembly (400) is arranged in the shell (100), the stator assembly (400) is positioned on the radial outer side of the rotor assembly (300), and the stator assembly (400) is coated with plastic package.

2. The coreless motor of claim 1, wherein the housing (100) comprises:

a housing (110), wherein two ends of the housing (110) are opened;

The flange end cover (120) is matched with one end of the shell (110), and the flange end cover (120) is provided with a shaft hole (121) for the rotating shaft (310) to penetrate out;

And a cover (130), wherein the cover (130) is matched with the other end of the shell (110).

3. The coreless motor of claim 2, wherein the flange end cap (120) is threadably connected to the housing (110), and the flange end cap (120) is welded to the housing (110); the cover (130) is welded to the housing (110).

4. The coreless motor of claim 2, wherein the shaft bore (121) is internally fitted with a first bearing (500) that is sleeved on the rotating shaft (310);

The sealing cover (130) is provided with a bearing hole (131), one end of the rotating shaft (310) far away from the flange end cover (120) stretches into the bearing hole (131), and a second bearing (600) sleeved on the rotating shaft (310) is matched in the bearing hole (131).

5. The coreless motor of claim 4, further comprising an elastic member (700), wherein the elastic member (700) is sleeved on the rotating shaft (310), one end of the elastic member (700) is abutted against the first bearing (500), and the other end of the elastic member (700) is abutted against the shaft sleeve (340).

6. The coreless motor of claim 5, wherein the two ends of the rotating shaft (310) are respectively provided with a clamping groove (311), the clamping grooves (311) are used for accommodating shaft clamping rings, and the two shaft clamping rings are respectively used for stopping the first bearing (500) and the second bearing (600).

7. The coreless motor of claim 2, wherein the cover (130) is provided with a wire outlet passage (132) extending in a circumferential direction thereof, and the wire outlet passage (132) forms a wire outlet hole (133) in an outer circumferential surface of the cover (130).

8. The coreless motor of any one of claims 1-7, wherein both of the bushings (340) are welded to the shaft (310), and both of the bushings (340) are welded to the sleeve (330).

9. The coreless motor of any of claims 1-7, wherein an inner sidewall of the magnetic shoe (320) is bonded to an outer sidewall of the shaft (310), and wherein an outer sidewall of the magnetic shoe (320) is bonded to the sleeve (330).

10. The coreless motor of any one of claims 1-7, wherein the stator assembly (400) comprises:

A stator wire cup (410), wherein the stator wire cup (410) is sleeved on the rotor assembly (300) and has a gap with the sleeve (330);

The circuit board (420), circuit board (420) connect in on stator wire cup (410), the end of a thread of stator wire cup (410) with circuit board (420) welding, and increase joint strength through the point is glued.