TWI616053B - Motor and its rotor - Google Patents

Abstract

The invention relates to a motor and a rotor thereof. The motor includes a body, a stator, and a rotor. The seat has a shaft tube portion. The stator is sleeved on a shaft tube portion of the seat body. The rotor includes a rotating cover, a ring-shaped magnetic pole, and a rotating shaft. The rotating cover has a receiving slot and a top weight area. The receiving slot is used for receiving the stator. The top weight area corresponds to the accommodating slot, the top weight area is used for setting at least one weight, and the top weight area has an outer diameter. The annular magnetic pole is disposed in the receiving groove of the rotating cover, the annular magnetic pole has an inner diameter, and the outer diameter of the top weight area is less than or equal to the inner diameter of the annular magnetic pole. The rotating shaft is pivoted on the shaft tube portion, and one end of the rotating shaft is connected to the rotating cover. Thereby, the top weight area can be prevented from interfering with the setting of the ring-shaped magnetic pole, and the overall thickness of the motor can be reduced.

Description

Motor and its rotor

The invention relates to a motor and a rotor thereof.

In order to maintain the balance and stability of the rotor during the rotation of the conventional motor, a counterweight or a part of the rotor is removed to make the rotor reach a rotationally balanced state, thereby preventing the rotor from vibrating due to unbalanced rotation. However, the design of the counterweight structure of the conventional rotor is poor, so that it will interfere with the arrangement of the annular magnetic poles, and cause the overall thickness of the conventional motor to increase. Therefore, it is necessary to provide an innovative and progressive motor and its rotor to solve the above problems.

In one embodiment, a motor includes a body, a stator, and a rotor. The seat has a shaft tube portion. The stator is sleeved on a shaft tube portion of the seat body. The rotor includes a rotating cover, a ring-shaped magnetic pole, and a rotating shaft. The rotating cover has a receiving slot and a top weight area. The receiving slot is used for receiving the stator. The top weight area corresponds to the accommodating slot, the top weight area is used for setting at least one weight, and the top weight area has an outer diameter. The annular magnetic pole is disposed in the receiving groove of the rotating cover, the annular magnetic pole has an inner diameter, and the outer diameter of the top weight area is less than or equal to the inner diameter of the annular magnetic pole. The rotating shaft is pivoted on the shaft tube portion, and one end of the rotating shaft is connected to the rotating cover. In one embodiment, a rotor includes a rotating cover, a ring-shaped magnetic pole, and a rotating shaft. The rotating cover has a receiving slot and a top weight area. The top weight area corresponds to the accommodating slot, the top weight area is used for setting at least one weight, and the top weight area has an outer diameter. The annular magnetic pole is disposed in the receiving groove of the rotating cover, the annular magnetic pole has an inner diameter, and the outer diameter of the top weight area is less than or equal to the inner diameter of the annular magnetic pole. One end of the rotating shaft is connected to the rotating cover. By controlling the outer diameter of the top weight area to be smaller than or equal to the inner diameter of the ring-shaped magnetic pole, the present invention can prevent the top weight area from interfering with the setting of the ring-shaped magnetic pole, thereby reducing the overall thickness of the motor.

FIG. 1 shows an exploded perspective view of a motor of the present invention. FIG. 2 shows a perspective assembled view of the motor of the present invention. Fig. 3 shows a sectional view of the motor of the present invention, taken along the line A-A of Fig. 2. With reference to FIG. 1, FIG. 2, and FIG. 3, the motor 1 of the present invention includes a base 10, a stator 20, and a rotor 30. The base body 10 has a shaft tube portion 11. The stator 20 is sleeved on the shaft tube portion 11 of the base body 10. The rotor 30 includes a rotating cover 31, a ring-shaped magnetic pole 32 and a rotating shaft 33. Figure 4 shows a combined sectional view of a rotor of the present invention. With reference to FIG. 1, FIG. 3 and FIG. 4, the rotating cover 31 has a receiving groove 311 and a top weight area 312. The accommodating slot 311 is used for accommodating the stator 20. The accommodating slot 311 has a shaft protruding portion 313, and the shaft protruding portion 313 has a first height H1. The top weight area 312 corresponds to the receiving groove 311. The top weight area 312 is used to set at least one weight 40, and the top weight area 312 has an outer diameter D1. In one or more embodiments, the top weight area 312 is a metal area, and the rotating cover 31 is punched to form the top weight area 312. The top weight area 312 has at least one weight groove portion 312U and at least one weight support protrusion 312V. The at least one counterweight groove portion 312U is used to set the at least one counterweight 40. The at least one counterweight supporting protrusion 312V corresponds to the at least one counterweight groove 312U to support the at least one counterweight 40. The at least one counterweight supporting protrusion 312V has a second height H2. In this embodiment, the second height H2 is smaller than the first height H1 of the shaft-mounting protrusion 313 to avoid the at least one counterweight. The supporting protrusion 312V interferes with the arrangement of the stator 20. In this aspect, the top weight area 312 has a plurality of weight groove portions 312U and a plurality of weight support protrusions 312V. The counterweight grooves 312U are arranged in a ring shape at intervals, so as to provide a balance weight 40 at multiple points. In addition, each of the weight supporting convex portions 312V corresponds to each of the weight groove portions 312U. Figure 5 shows a bottom view of the rotor of the invention. As shown in FIG. 1, FIG. 4 and FIG. 5, the ring-shaped magnetic pole 32 is disposed in the receiving slot 311 of the rotating cover 31, and the ring-shaped magnetic pole 32 has an inner diameter D2. In this embodiment, the outer diameter D1 of the top weight region 312 is less than or equal to the inner diameter D2 of the ring-shaped magnetic pole 32 to prevent the top weight region 312 from interfering with the setting of the ring-shaped magnetic pole 32. The rotating shaft 33 is pivoted on the shaft tube portion 11, and one end 33E of the rotating shaft 33 is connected to the rotating cover 31. In this aspect, one end 33E of the rotating shaft 33 is connected to the shaft-receiving convex portion 313. In addition, in this aspect, the at least one counterweight support projection 312V is located between the rotating shaft 33 and the annular magnetic pole 32, and preferably, the at least one counterweight support projection 312V is located on the shaft. Between the convex portion 313 and the ring-shaped magnetic pole 32, in this way, the at least one counterweight supporting convex portion 312V can be prevented from interfering with the arrangement of the ring-shaped magnetic pole 32. FIG. 6 is a perspective assembled view of a rotor according to a second embodiment of the present invention. Fig. 7 shows a combined sectional view of a rotor according to a second embodiment of the present invention. With reference to FIG. 6 and FIG. 7, the structural features of the rotor of the second embodiment of the present invention are basically the same as those of the first embodiment. The only difference is that the rotating cover 31 has a top surface 31S, and the top weight area 312 has A weighted convex portion 312P. The weight convex portion 312P is convexly disposed on the top surface 31S, and the weight convex portion 312P is used to set the at least one weight object 40. In addition, the weighted convex portion 312P has an outer peripheral surface 312S, and an included angle θ is formed between the outer peripheral surface 312S and the top surface 31S. The concave area where the included angle θ is located can be used to set the at least one weighted object 40. And preferably, the included angle θ is greater than or equal to 90 ° to facilitate the positioning of the at least one weight 40. Referring to FIG. 8, it is a three-dimensional assembled view showing a rotor according to a third embodiment of the present invention. The structural features of the rotor of the third embodiment of the present invention are basically the same as those of the first embodiment, except that the at least one counterweight groove portion 312U has a ring shape. Referring to FIG. 9, it is a perspective assembled view showing a rotor according to a fourth embodiment of the present invention. The structural features of the rotor of the fourth embodiment of the present invention are basically the same as those of the first embodiment, except that the position of the at least one counterweight groove portion 312U corresponds to the shaft convex portion 313, and the at least one counterweight concave portion The groove portion 312U has a circular groove shape. In addition, the at least one counterweight groove portion 312U has an inner wall surface 312C, and the inner wall surface 312C can be used to set the at least one counterweight. With the above structural configuration, the present invention can effectively prevent the top weight region 312 from interfering with the setting of the ring-shaped magnetic pole 32, and can further reduce the overall thickness of the motor 1 of the present invention. The above embodiments are only for explaining the principle of the present invention and its effects, and not for limiting the present invention. Therefore, those skilled in the art can modify and change the above embodiments without departing from the spirit of the present invention. The scope of rights of the present invention should be listed in the scope of patent application described later.

1‧‧‧ Motor
10‧‧‧ seat
11‧‧‧ shaft tube
20‧‧‧ Stator
30‧‧‧rotor
31‧‧‧Swivel cover
31S‧‧‧Top
311‧‧‧Receiving slot
312‧‧‧Top weight area
312C‧‧‧Inner wall surface
312P‧‧‧weighted protrusion
312S‧‧‧outer surface
312U‧‧‧ Counterweight groove
312V‧‧‧ Counterweight support projection
313‧‧‧ shaft projection
32‧‧‧ Toroidal pole
33‧‧‧Shaft
33E‧‧‧One end of the shaft
40‧‧‧ Counterweight
D1‧‧‧ Outside diameter
D2‧‧‧Inner diameter
H1‧‧‧First height
H2‧‧‧Second height θ‧‧‧ Angle

FIG. 1 shows an exploded perspective view of a motor of the present invention. FIG. 2 shows a perspective assembled view of the motor of the present invention. Fig. 3 shows a sectional view of the motor of the present invention, taken along the line A-A of Fig. 2. Fig. 4 shows a combined sectional view of a rotor according to a first embodiment of the present invention. Fig. 5 shows a bottom view of a rotor according to a first embodiment of the present invention. FIG. 6 is a perspective assembled view of a rotor according to a second embodiment of the present invention. Fig. 7 shows a combined sectional view of a rotor according to a second embodiment of the present invention. FIG. 8 is a perspective assembled view of a rotor according to a third embodiment of the present invention. FIG. 9 shows a perspective assembled view of a rotor according to a fourth embodiment of the present invention. Common reference numbers are used throughout the drawings and herein to indicate the same or similar components. The invention will become more apparent from the following detailed description in conjunction with the accompanying drawings.

1‧‧‧ Motor

10‧‧‧ seat

11‧‧‧ shaft tube

20‧‧‧ Stator

30‧‧‧rotor

31‧‧‧Swivel cover

311‧‧‧Receiving slot

312‧‧‧Top weight area

312U‧‧‧ Counterweight groove

313‧‧‧ shaft projection

32‧‧‧ Toroidal pole

33‧‧‧Shaft

33E‧‧‧One end of the shaft

40‧‧‧ Counterweight

Claims (32)

A motor includes: a body having a shaft tube portion; a stator sleeved on the shaft tube portion of the base body; and a rotor including: a rotating cover having a receiving groove and a top weight area, the The accommodating slot is used for accommodating the stator, the top weight area corresponds to the accommodating slot, the top weight area is used for setting at least one weight, and the top weight area has an outer diameter; a ring-shaped magnetic pole Is arranged in the receiving slot of the rotating cover, the ring-shaped magnetic pole has an inner diameter, and the outer diameter of the top weight area is smaller than or equal to the inner diameter of the ring-shaped magnetic pole; and a rotating shaft is pivotally arranged on the A shaft tube portion, and one end of the rotating shaft is connected to the rotating cover. The motor of claim 1, wherein the top weight area has at least one weight groove portion and at least one weight support protrusion, the at least one weight groove portion is used for setting the at least one weight object, and the at least one A counterweight supporting protrusion corresponds to at least one counterweight groove. The motor according to claim 2, wherein the at least one counterweight supporting protrusion is located between the rotating shaft and the annular magnetic pole. The motor as claimed in claim 3, wherein the accommodation groove has a shaft-arranged convex portion, and the at least one counterweight supporting convex portion is located between the shaft-arranged convex portion and the annular magnetic pole. According to the motor of claim 4, wherein the shaft-mounting convex portion has a first height, the at least one counterweight supporting convex portion has a second height, and the second height is smaller than the first height. The motor as claimed in claim 4, wherein one end of the rotating shaft is connected to the shaft protruding portion. The motor according to claim 2, wherein the at least one counterweight groove portion is annular. For example, the motor of claim 2, wherein the top counterweight area has a plurality of counterweight groove portions and a plurality of counterweight support protrusions, and the counterweight groove portions are arranged in a ring shape at intervals, and each counterweight support protrusion The portion corresponds to each of the weight groove portions. The motor of claim 1, wherein the rotating cover has a top surface, the top weight area has a weight convex portion, the weight convex portion is protruded on the top surface, and the weight convex portion is used to set the at least A counterweight. The motor of claim 9, wherein the weighted convex portion has an outer peripheral surface, and an angle is formed between the outer peripheral surface and the top surface. The motor of claim 10, wherein the included angle is greater than or equal to 90 °. The motor of claim 1, wherein the top weight area is a metal area. The motor of claim 1, wherein the rotating cover is punched to form the top weight area. The motor according to claim 1, wherein the receiving groove has a shaft protruding portion, the top weight area has at least one weight groove portion, and the at least one weight groove portion is used for setting the at least one weight object. And the position of the at least one counterweight groove portion corresponds to the shaft convex portion. The motor of claim 14, wherein the at least one counterweight groove is in a circular groove shape. The motor according to claim 14, wherein the at least one counterweight groove portion has an inner wall surface, and the inner wall surface is used for setting the at least one counterweight. A rotor includes: a rotating cover having a receiving slot and a top weight area, the top weight area corresponding to the receiving slot, the top weight area for setting at least one weight, and the top weight The heavy area has an outer diameter; a ring-shaped magnetic pole is disposed in the receiving slot of the rotating cover, the ring-shaped magnetic pole has an inner diameter, and the outer diameter of the top weight area is less than or equal to that of the ring-shaped magnetic pole An inner diameter; and a rotating shaft, one end of which is connected to the rotating cover. According to the rotor of claim 17, wherein the top weight area has at least one weight groove portion and at least one weight support convex portion, the at least one weight groove portion is used for setting the at least one weight object, and the at least one A counterweight supporting protrusion corresponds to at least one counterweight groove. The rotor of claim 18, wherein the at least one counterweight supporting protrusion is located between the rotating shaft and the annular magnetic pole. According to the rotor of claim 19, wherein the accommodating groove has an axially disposed convex portion, the at least one counterweight supporting convex portion is located between the axially disposed convex portion and the annular magnetic pole. The rotor as claimed in claim 20, wherein the shaft-receiving convex portion has a first height, the at least one counterweight supporting convex portion has a second height, and the second height is smaller than the first height. The rotor as claimed in claim 20, wherein one end of the rotating shaft is connected to the shaft protruding portion. The rotor as claimed in claim 18, wherein the at least one counterweight groove portion is annular. For example, the rotor of claim 18, wherein the top counterweight area has a plurality of counterweight groove portions and a plurality of counterweight support protrusions, and the counterweight groove portions are arranged at intervals in a ring, and each counterweight support protrusion The portion corresponds to each of the weight groove portions. According to the rotor of claim 17, wherein the rotating cover has a top surface, the top weight area has a weight convex portion, the weight convex portion is protruded on the top surface, and the weight convex portion is used for setting the at least A counterweight. The rotor of claim 25, wherein the weighted convex portion has an outer peripheral surface, and an angle is formed between the outer peripheral surface and the top surface. The rotor of claim 26, wherein the included angle is greater than or equal to 90 °. The rotor of claim 17, wherein the top weight area is a metal area. The rotor of claim 17, wherein the rotating cover is punched to form the top weight area. The rotor as claimed in claim 17, wherein the receiving groove has a shaft protruding portion, the top weight area has at least one weight groove portion, and the at least one weight groove portion is used for setting the at least one weight object. And the position of the at least one counterweight groove portion corresponds to the shaft convex portion. The rotor as claimed in claim 30, wherein the at least one counterweight groove portion is in a circular groove shape. The rotor of claim 30, wherein the at least one counterweight groove portion has an inner wall surface, and the inner wall surface is used for setting the at least one counterweight.