TWM564866U - Inner rotor motor with hollow axle center - Google Patents

Abstract

The present invention is an inner rotor motor comprising a hollow stator, a hollow spiral inner rotor, and two blade bearings. The fan blade bearing combines the hollow stator and the hollow spiral inner rotor and makes the two coaxial and rotatable relative to each other; the hollow spiral inner rotor is disposed through the hollow stator, and the hollow inner rotor with hollow ends is open The pipe body is a shaft combined with a fan blade bearing. By designing the hollow inner spiral rotor as a hollow pipe body, and combining the hollow spiral inner rotor and the hollow stator with the fan blade bearing and coaxially rotating relative to each other, thereby hollowing out the axial portion of the spiral inner rotor It has space for air circulation, so that one leaf bearing can take in air when it rotates; the other fan bearing rotates synchronously to discharge hot air to form a hollow space to accelerate the flow of air, so that the creation can greatly improve the heat dissipation performance. .

Description

Axial hollow inner rotor motor

The present invention relates to a brushless motor, and more particularly to a brushless motor of an inner rotor.

A brushless motor is a driving device that generates a magnetic field by energizing a stator coil, thereby driving a rotor provided with a permanent magnet to rotate, thereby converting electrical energy into kinetic energy. A general brushless motor can be roughly divided into two types. The first type is an outer rotor. The rotor with the permanent magnet is sleeved around the outer side of the stator coil, and the inner stator coil is fixed to rotate the outer rotor motor. The second type is an inner rotor in which a rotor provided with a permanent magnet is inserted into the inner side of the stator coil in which the ring type is arranged, and the stator coil is fixed on the outer side to rotate the inner rotor motor.

In the prior art, the rotor of the inner rotor motor generally takes the form of a cylinder, and a plurality of permanent magnets are arranged around the outer wall surface of the cylinder, and a shaft rod is disposed through the axial center of the cylinder; The part of the stator is a hollow tube body closed at both ends and a plurality of stator coils are arranged around the inner wall surface. When the inner rotor is combined with the stator, the inner rotor is disposed on the inner diameter of the stator coils, and the axial rod of the inner rotor penetrates the closed ends of the stator, and serves as a fulcrum to stably rotate relative to the inner rotor, and Both are kept coaxial.

However, such a structure may be because the inner rotor is covered inside the stator and covered by both sides, and the air is not easily circulated, so that the heat energy generated by the stator coil when energized is not easily eliminated, and the heat dissipation effect is poor, resulting in shortened service life and failure rate. Improvement, so the prior art inner rotor motor does have the need for improvement.

In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an inner-rotor motor with a shaft core hollowed out, and the structure whose shaft core is hollowed out and connected by a fan bearing can enhance the heat dissipation performance and further prolong the service life.

In order to achieve the above-mentioned creative purpose, the technical means adopted in the present invention is to design an inner-rotor motor with a hollow shaft, which comprises: a hollow stator, which comprises a plurality of coil portions, which are arranged around the interval and Forming a hollow space at the center; two blade bearings connected to the hollow stator and respectively located at two sides of the coil portions, and each of the blade bearings has a bearing outer frame that is relatively rotatable, and is connected to The hollow inner stator is coupled to the outer frame of the bearing and includes a plurality of blade portions surrounding the inner wall surface of the inner frame of the bearing; a hollow spiral inner rotor, The two ends of the hollow bearing are coaxially and rotatably disposed in the hollow space of the hollow stator. The hollow spiral inner rotor comprises a spiral inner rotor tube body having two ends open, and the peripheral edges of the two end openings are respectively recessed along the extending direction of the spiral inner rotor tube body to form a plurality of hollows a grooving groove, the hollow spiral groove penetrating the inner wall surface and the outer wall surface of the hollow spiral inner rotor, and the fan blade portions of the two blade bearings are respectively fixed and fixed to the two end openings Inside the hollow spiral groove; a plurality of magnets surrounding the outer wall surface of the spiral inner rotor body.

The advantage of the present invention is that the inner rotor design is improved into a hollow spiral inner rotor and includes a spiral inner rotor tube body and two end openings, wherein both ends of the opening have spiral groove grooves, and are spirally inside. The rotor tube body is used as the axial center and the plurality of magnets are disposed on the outer wall surface thereof, thereby hollowing out the axial center portion of the spiral inner rotor, that is, the spiral inner rotor tube body, and being hollowed out and allowing air to circulate, and fan The leaf bearing is connected to the hollow spiral inner rotor and the hollow stator so that the two are kept coaxial and relatively rotatable, so that it is not necessary to use the shaft rod to penetrate the closed protective cover as a fulcrum, that is, the ventilation can be increased. And the blade portion of the fan bearing is fitted in the hollow spiral groove of the spiral inner rotor tube, so that the blade portion can be in the axis of the spiral inner rotor tube when the inner rotor of the hollow spiral is rotated The portion forms a fan to accelerate the air circulation of the axial portion to further increase the heat dissipation performance.

Further, the axially hollow inner rotor motor, wherein the hollow stator further comprises a stator tube body, the coil portions are circumferentially spaced apart from an inner wall surface of the stator tube body, the at least one fan The bearing outer frame of the leaf bearing is disposed on an inner wall surface of the stator tube body.

Further, the axially hollow inner rotor motor, wherein each of the blade bearings further comprises a plurality of balls, and an inner sliding surface of the bearing outer frame of each of the fan shafts is provided with an outer sliding groove, and The outer wall surface of the inner frame of the bearing is provided with an inner sliding groove, and the balls are disposed in the inner sliding groove and are disposed in the outer sliding groove, and the bearing outer frame and the bearing inner frame abut each other with the balls, and They can be connected in a relatively rotatable manner.

The technical means adopted by the present invention for achieving the intended purpose of creation are further explained below in conjunction with the drawings and the preferred embodiment of the present invention.

Referring to FIGS. 1 and 2, the axially hollow inner rotor motor of the present invention comprises a hollow stator 10, two blade bearings 20 and a hollow spiral inner rotor 30.

The hollow stator 10 includes a plurality of coil portions 11 which are circumferentially spaced apart and form a hollow space 12 at the center; specifically, in the present embodiment, the hollow stator 10 further includes a stator tube body 13. The coil portions 11 are disposed on the inner wall surface of the stator tube 13 at intervals. However, the hollow stator 10 may be formed only by the plurality of coil portions 11 .

Referring to FIG. 2 and FIG. 5, the two blade bearings 20 are connected to the hollow stator 10 and are respectively located at two sides of the coil portions 11 of the hollow stator 10, and each of the blade bearings 20 has a bearing that is relatively rotatable. The outer frame 21 and a bearing inner frame 22, the bearing outer frame 21 is connected to the hollow stator 10, and specifically, in the embodiment, the bearing outer frame 21 is provided on the inner wall surface of the stator tube body 13 of the hollow stator 10. However, not limited thereto, if the hollow stator 10 does not include the stator tube body 13, the bearing outer frame 21 is directly connected to the coil portions 11; the bearing inner frame 22 includes a plurality of blade portions 221, and the like The blade portion 221 is disposed around the inner wall surface of the bearing inner frame 22 such that the bearing inner frame 22 takes the form of a fan. In addition, in the embodiment, the blade bearing 20 further includes a plurality of balls 23, and an inner sliding surface of the bearing outer frame 21 is provided with an outer sliding groove 211, and an outer wall surface of the bearing inner frame 22 is provided with an inner sliding groove 222. The ball 23 is disposed in the inner chute 222 and is disposed in the outer chute 211 at the same time. The bearing outer frame 21 and the bearing inner frame 22 abut each other with the balls 23 and are rotatably connected, that is, the fan bearing 20 presents a form of ball 23 bearing, but not limited thereto, and may also be a needle bearing, and only the bearing inner frame 22 can be rotated with the bearing outer frame 21.

Referring to FIG. 2, FIG. 4 and FIG. 5, both ends of the hollow spiral inner rotor 30 are coaxially passed through the two bearing inner frames 22 coupled to the two blade bearings 20, and the spiral inner rotor 30 is hollowed out. Coaxially and relatively rotatably disposed in the hollow space 12 of the hollow stator 10, that is, the hollow spiral inner rotor 30 is a bearing inner frame 22 through which a blade bearing 20 is inserted, and then is worn. The hollow space 12 of the hollow stator 10 is again passed through the bearing inner frame 22 of the other blade bearing 20; the hollow spiral inner rotor 30 includes a spiral inner rotor tube body 31 and a plurality of magnets 32, and the magnets 32 The spiral inner rotor tube body 31 has an outer wall surface which is open at both ends, and the peripheral edges of the two end openings are respectively recessed along the extending direction of the spiral inner rotor tube body 31 to form a plurality of ridges. The spiral groove 33 is disposed, and the blade portions 221 of the two blade bearings 20 are respectively fitted and fixed in the hollow spiral grooves 33 which are open at both ends, thereby hollowing out the spiral of the spiral inner rotor 30. The inner rotor tube body 31 is coupled to the blade portion 221 of the blade bearing 20, and the bearing in which the blade portion 221 is located The inner frame 22 is rotatably coupled with the bearing outer frame 21, and the bearing outer frame 21 is coupled to the stator tube body 13 of the hollow stator 10, so that the hollow stator 10 is combined with the hollow stator 10 as a fulcrum. And coaxially and relatively rotatably disposed in the hollow space 12 of the hollow stator 10. In addition, in the present embodiment, the spiral extending direction of the hollow spiral groove 33 is a clockwise direction, but is not limited thereto.

Referring to FIG. 3 and FIG. 4, the present invention designs the hollow spiral inner rotor 30 as a hollow tubular body having open ends, and is fitted with the fan bearing 20 and the hollow spiral inner rotor 30. The structure acts as a fulcrum and is coaxially and relatively rotatable with the hollow stator 10 such that both ends of the hollow stator 10 are the fan bearing 20 instead of the closed wall, and the axis of the spiral inner rotor 30 is hollowed out. The heart portion has a space for air circulation, and the fan blade portion 221 of the blade bearing 20 forms a fan to accelerate the flow of air while rotating, whereby the creation can greatly improve the heat dissipation performance.

The above description is only a preferred embodiment of the present invention, and does not impose any form limitation on the present invention. Although the present invention has been disclosed above in the preferred embodiment, it is not intended to limit the present creation, and has any technical field. A person skilled in the art can make some modifications or modifications to equivalent embodiments by using the above-disclosed technical contents without departing from the technical scope of the present invention. The technical essence of the creation Any simple modification, equivalent change and modification of the above embodiments are still within the scope of the technical solution of the present invention.

10‧‧‧ hollow stator
11‧‧‧ coil department
12‧‧‧ hollow space
13‧‧‧Stator body
20‧‧‧ fan bearing
21‧‧‧ bearing frame
211‧‧‧ outer chute
22‧‧‧ bearing inner frame
221‧‧‧Face
222‧‧‧inch chute
23‧‧‧ balls
30‧‧‧ hollow spiral inner rotor
31‧‧‧Spiral inner rotor body
32‧‧‧ magnet
33‧‧‧ hollow spiral groove

Figure 1 is a three-dimensional appearance of the creation. Figure 2 is an exploded perspective view of the present creation. Figure 3 is a front view of the creation. Figure 4 is a side cross-sectional view of the present creation. Fig. 5 is a side view showing the structure of the hollow spiral inner rotor and the fan bearing of the present invention.

Claims (3)

An axially hollow inner rotor motor comprising: a hollow stator comprising a plurality of coil portions circumferentially spaced apart and forming a hollow space at a center; two blade bearings connected to The hollow stators are respectively located at two sides of the coil portions, and each of the blade bearings has a bearing outer frame that is relatively rotatable and coupled to the hollow stator; a bearing inner frame connected to the outer bearing The frame further includes a plurality of blade portions surrounding the inner wall surface of the inner frame of the bearing; a hollow spiral inner rotor, the two ends of which are coaxially penetrated and coupled to the two blade bearings a bearing inner frame, and the hollow spiral inner rotor is coaxially and rotatably disposed in the hollow space of the hollow stator, the hollow spiral inner rotor includes a spiral inner rotor tube, a plurality of hollow spiral grooves are formed in the periphery of the spiral inner rotor tube body, and the hollow spiral grooves extend through the hollow spiral inner rotor. of a wall surface and an outer wall surface, wherein the fan blade portions of the two blade bearings are respectively fitted and fixed in the hollow spiral grooves of the two ends; the plurality of magnets are disposed around the spiral inner rotor The outer wall of the pipe body. The axially hollow inner rotor motor of claim 1, wherein the hollow stator further comprises a stator tube body, the coil portions are circumferentially spaced apart from an inner wall surface of the stator tube body, the at least one fan The bearing outer frame of the leaf bearing is disposed on an inner wall surface of the stator tube body. The axially hollow inner rotor motor according to claim 1 or 2, wherein each of the blade bearings further comprises a plurality of balls, and an outer sliding groove is disposed on an inner wall surface of the bearing outer frame of each of the blade shafts. The outer wall surface of the inner frame of the bearing is provided with an inner sliding groove. The balls are disposed in the inner sliding groove and are disposed in the outer sliding groove. The bearing outer frame and the bearing inner frame abut each other with the balls. And can be connected in a relatively rotatable manner.