TWI609133B - Fan and its motor - Google Patents

Description

Fan and its motor

The invention relates to a fan and a motor therefor.

In the assembly process of the conventional fan, the central shaft and the fan wheel are combined in a tight fit manner, and when the fan wheel is assembled to the central shaft, the fan wheel is strongly pressed to the central shaft. In the process of strong compression, the bearing may be damaged or the bearing may be displaced and deformed, which may cause the central shaft to be accurately positioned in the bearing, causing serious problems of unsmooth rotation or inability to rotate.

The present invention relates to a fan. The fan comprises: a base, a shaft tube, a certain subgroup, a rotor group, a fan wheel and an elastic member. The base has a first abutting end. The shaft tube has a second abutting end and is disposed on the base. The stator set has a third abutting end and is disposed at a periphery of the shaft tube. The rotor set has a motor housing and a center shaft. The central shaft is rotatably disposed in the shaft tube, the central shaft has a bottom, the motor casing has a radially extending inner side wall, and the bottom portion and the first abutting end are at a first distance, the diameter A second distance is formed between the inner side wall and the second abutting end, and a third distance between the radially extending inner side wall and the third abutting end. The fan wheel is coupled to the central shaft in a tight fit. The elastic member is disposed around the central shaft. The elastic member has a maximum compression stroke, and at least one of the first distance, the second distance, or the third distance is less than the maximum compression stroke.

The present invention relates to a motor. The motor includes: a base and an axle Tube, a certain subgroup, a rotor set and an elastic member. The base has a first abutting end. The shaft tube has a second abutting end and is disposed on the base. The stator set has a third abutting end and is disposed at a periphery of the shaft tube. The rotor set has a motor housing and a center shaft. The central shaft is rotatably disposed in the shaft tube, the central shaft has a bottom, the motor casing has a radially extending inner side wall, and the bottom portion and the first abutting end are at a first distance, the diameter A second distance is formed between the inner side wall and the second abutting end, and a third distance between the radially extending inner side wall and the third abutting end. The elastic member is disposed around the central shaft. The elastic member has a maximum compression stroke, and at least one of the first distance, the second distance, or the third distance is less than the maximum compression stroke.

Therefore, when at least one of the first distance, the second distance or the third distance is less than the maximum compression stroke, the first abutting end, the first The second abutting end or the third abutting end is strongly pressed against the bonding force of the fan wheel to the central shaft to avoid damaging the bearing in the shaft tube.

10‧‧‧ motor

11‧‧‧Base

12‧‧‧ shaft tube

13‧‧‧stator group

14‧‧‧Rotor group

16‧‧‧Flexible parts

20‧‧‧Fan

21‧‧‧fan wheel

111‧‧‧First abutment

112‧‧‧floor

113‧‧‧Protruding

114‧‧‧ body

121‧‧‧second abutment

122‧‧‧ openings

123‧‧‧ bearing

131‧‧‧ third abutment

132‧‧‧ Winding sleeve

133‧‧‧ coil

134‧‧‧magnetic sheet

141‧‧ ‧ motor casing

142‧‧‧ center axis

143‧‧‧ bottom

144‧‧‧ radially extending inner side wall

211‧‧‧ Central Department

212‧‧‧ blades

G1‧‧‧ first distance

G2‧‧‧Second distance

G3‧‧‧ third distance

G4‧‧‧Maximum compression stroke

1 is a schematic cross-sectional view of a fan of the present invention; FIG. 2 is a cross-sectional view showing a fan of the present invention; FIG. 3 is a cross-sectional view showing a fan according to an embodiment of the present invention; A schematic cross-sectional view of a fan in accordance with an embodiment of the present invention.

Figure 1 shows a schematic cross-sectional view of a fan of the present invention. Figure 2 shows an exploded cross-sectional view of the fan of the present invention. 1 and 2, in an embodiment, the motor 10 of the present invention includes a base 11, a shaft tube 12, a certain subset 13, a rotor assembly 14, and an elastic member 16. In one embodiment, the motor 10 of the present invention is applicable to a fan 20, and the fan 20 of the present invention includes a motor 10 and a fan wheel 21.

The base 11 has a first abutting end 111. The base 11 has a bottom The plate 112 has a protruding portion 113. The first abutting end 111 is disposed on the protruding portion 113, that is, the first abutting end 111 is disposed on a top surface of the protruding portion 113. The projection 113 may be hollow or solid. The base 11 further includes a body 114 disposed on the bottom plate 112 and coupled to the bottom plate 112.

The shaft tube 12 has a second abutting end 121 and is disposed on the base 11 . In an embodiment, the shaft tube 12 is disposed on the base 114 of the base 11 . The shaft tube 12 includes an opening 122 that faces upward. The second abutting end 121 is disposed at one end of the opening 122. At least one bearing 123 is disposed in the shaft tube 12, and the at least one bearing 123 is provided with a shaft hole.

The stator assembly 13 has a third abutting end 131 and is disposed at the periphery of the shaft tube 12. The stator assembly 13 further includes a winding sleeve 132, a coil 133 and at least one magnetic conductive sheet 134. The coil 133 is wound around the winding sleeve 132 , and the at least one magnetic conductive sheet 134 is disposed on the winding sleeve 132 . The third abutting end 131 is disposed on the top of one of the winding sleeves 132. In an embodiment, the at least one magnetically conductive member 134 can be a silicon steel sheet or other magnetically permeable member.

The rotor assembly 14 has a motor housing 141 and a central shaft 142. The central shaft 142 is rotatably disposed in the shaft tube 12 , and the central shaft 142 is disposed in the shaft hole of the at least one bearing 123 . The center shaft 142 has a bottom 143. The motor casing 141 has a dome shape and covers the shaft tube 12 and the stator assembly 13. The inner side of the motor casing 141 has a radially extending inner side wall 144. A first distance G1 is defined between the bottom portion 143 and the first abutting end 111, and a second distance G2 between the radially extending inner side wall 144 and the second abutting end 121 is within the radial extension. A third distance G3 is defined between the sidewall 144 and the third abutting end 131.

The fan wheel 21 is coupled to the central shaft 142 in a tight fit. The fan wheel 21 has a central portion 211 and a plurality of blades 212. The central portion 211 has a hollow inner diameter D1 that is smaller than an outer diameter D2 of the central axis 142. Therefore, when the fan wheel 21 is assembled to the center shaft 142, the fan wheel 21 is strongly pressed to the center shaft 142, so that the fan wheel 21 is tight. The coupling is coupled to the central shaft 142.

The elastic member 16 is disposed around the central shaft 142. In one embodiment, the elastic member 16 is disposed between the radially extending inner side wall 144 of the motor casing 141 and the at least one bearing 123. The elastic member 16 can be a spring. The elastic member 16 has a maximum compression stroke G4, and at least one of the first distance G1, the second distance G2 or the third distance G3 is smaller than the maximum compression stroke G4.

As described above, when the fan wheel 21 is assembled to the center shaft 142, since the hollow inner diameter D1 is smaller than the outer diameter D2 of the center shaft 142, the fan wheel 21 is strongly pressed to the center shaft 142. In the process of strong compression, the elastic member 16 is first compressed. If the elastic member 16 is compressed to the maximum compression stroke G4, the elastic member 16 has no compressible space, and if the fan wheel 21 and the central shaft 142 continue to be strongly pressed. The damage of the bearing 123 may be caused, or the bearing 123 may be displaced and deformed, which may cause the central shaft 142 to be accurately positioned, causing serious problems of unsmooth rotation or inability to rotate. Therefore, at least one of the first distance G1, the second distance G2, or the third distance G3 is designed to be smaller than the maximum compression stroke G4, so that the elastic member 16 can be utilized when the maximum compression stroke G4 is not reached. The abutting end 111, the second abutting end 121 or the third abutting end 131 are subjected to a force of strong compression bonding to avoid damage to the bearing 123.

Referring to Figure 3, there is shown a cross-sectional view of a fan in accordance with one embodiment of the present invention. In an embodiment, the first distance G1 is smaller than the maximum compression stroke G4, and the second distance G2 and the third distance G3 are both greater than the first distance G1. Therefore, when the elastic member 16 is not compressed to the maximum compression stroke G4, the bottom portion 143 of the central shaft 142 is firstly abutted to the first abutting end 111, and the first abutting end 111 is strongly pressed against the fan. The bonding force of the wheel 21 to the central shaft 142. And because the second distance G2 and the third distance G3 are both greater than the first distance G1, the radially extending inner sidewall 144 does not contact or abut against the second abutting end 121 and the third abutting End 131.

Referring to Figure 4, there is shown a cross-sectional view of a fan in accordance with one embodiment of the present invention. In an embodiment, the second distance G2 is smaller than the maximum compression stroke G4, and the first distance G1 and the third distance G3 are both greater than the second distance G2. Therefore, when the elastic member 16 is not compressed to the maximum compression stroke G4, the radially extending inner side wall 144 of the motor casing 141 is firstly abutted to the second abutting end 121, and the second abutting end 121 is The bonding force of the fan wheel 21 to the center shaft 142 is strongly pressed. And the first distance G1 and the third distance G3 are both greater than the second distance G2, so the bottom 143 of the central axis 142 does not contact or abut against the first abutting end 111, and the radial extension The inner side wall 144 does not contact or abut against the third abutting end 131.

Referring to Figure 5, there is shown a cross-sectional view of a fan in accordance with one embodiment of the present invention. In an embodiment, the third distance G3 is smaller than the maximum compression stroke G4, and the first distance G1 and the second distance G2 are both greater than the third distance G3. Therefore, when the elastic member 16 is not compressed to the maximum compression stroke G4, the radially extending inner side wall 144 of the motor casing 141 is firstly abutted to the third abutting end 131, and the third abutting end 131 is The bonding force of the fan wheel 21 to the center shaft 142 is strongly pressed. And the first distance G1 and the second distance G2 are both greater than the third distance G3, so the bottom 143 of the central axis 142 does not contact or abut against the first abutting end 111, and the radial extension The inner side wall 144 does not contact or abut against the second abutting end 121.

In the above embodiment, one of the first distance G1, the second distance G2, or the third distance G3 is smaller than the maximum compression stroke G4, so that the first abutting end 111 and the second abutting end are One of the 121 or the third abutting end 131 is subjected to a strong force to press the fan wheel 21 to the central shaft 142. In other embodiments, the first abutting end 111, the second abutting end 121 or the third abutting end 131 can be used to simultaneously compress the combination of the fan wheel 21 and the central axis 142. The force may be used to simultaneously press the first abutting end 111, the second abutting end 121 and the third abutting end 131 to strongly press the combined force of the fan wheel 21 to the central shaft 142.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not limiting. this invention. Modifications and variations of the embodiments described above will be apparent to those skilled in the art without departing from the spirit of the invention. The scope of the invention should be as set forth in the appended claims.

10‧‧‧ motor

11‧‧‧Base

12‧‧‧ shaft tube

13‧‧‧stator group

14‧‧‧Rotor group

16‧‧‧Flexible parts

20‧‧‧Fan

21‧‧‧fan wheel

111‧‧‧First abutment

112‧‧‧floor

113‧‧‧Protruding

114‧‧‧ body

121‧‧‧second abutment

122‧‧‧ openings

123‧‧‧ bearing

131‧‧‧ third abutment

132‧‧‧ Winding sleeve

133‧‧‧ coil

134‧‧‧magnetic sheet

141‧‧ ‧ motor casing

142‧‧‧ center axis

143‧‧‧ bottom

144‧‧‧ radially extending inner side wall

211‧‧‧ Central Department

212‧‧‧ blades

G1‧‧‧ first distance

G2‧‧‧Second distance

G3‧‧‧ third distance

G4‧‧‧Maximum compression stroke

Claims (19)

A fan includes: a base having a first abutting end; a shaft tube having a second abutting end and disposed on the base; a certain subset having a third abutting end and disposed on the shaft a rotor assembly having a motor housing and a center shaft disposed in the shaft tube, the central shaft having a bottom portion, the motor housing having a radially extending inner side wall, the bottom portion and the bottom portion a first distance between the abutting end and a second distance between the radially extending inner side wall and the second abutting end, wherein the radially extending inner side wall and the third abutting end are a three-way; a wheel coupled to the central shaft by a tight fit; and an elastic member disposed around the central shaft, the elastic member having a maximum compression stroke, the first distance, the second distance or the third At least one of the distances is less than the maximum compression stroke; wherein the first distance is less than the maximum compression stroke, and the second distance and the third distance are both greater than the first distance. The fan of claim 1, wherein the second abutting end is disposed at an opening of the shaft tube. The fan of claim 1, wherein the fan wheel has a central portion and a plurality of blades, the central portion having a hollow inner diameter that is smaller than an outer diameter of the central axis. The fan of claim 1, wherein the base has a bottom plate, and the bottom plate has a protruding portion, and the first abutting end is disposed at the protruding portion. A fan according to claim 4, wherein the projection is hollow or solid. The fan of claim 1, wherein the stator set includes a winding sleeve and a coil, the coil is wound around the winding sleeve, and the third abutting end is disposed on the winding sleeve. The fan of claim 1, wherein at least one bearing is disposed in the shaft tube, and the elastic member is provided And disposed between the radially extending inner side wall of the motor casing and the at least one bearing. A fan according to claim 1, wherein the elastic member is a spring. A fan includes: a base having a first abutting end; a shaft tube having a second abutting end and disposed on the base; a certain subset having a third abutting end and disposed on the shaft a rotor assembly having a motor housing and a center shaft disposed in the shaft tube, the central shaft having a bottom portion, the motor housing having a radially extending inner side wall, the bottom portion and the bottom portion a first distance between the abutting end and a second distance between the radially extending inner side wall and the second abutting end, wherein the radially extending inner side wall and the third abutting end are a three-way; a wheel coupled to the central shaft by a tight fit; and an elastic member disposed around the central shaft, the elastic member having a maximum compression stroke, the first distance, the second distance or the third At least one of the distances is less than the maximum compression stroke; wherein the second distance is less than the maximum compression stroke, and the first distance and the third distance are both greater than the second distance. A fan includes: a base having a first abutting end; a shaft tube having a second abutting end and disposed on the base; a certain subset having a third abutting end and disposed on the shaft a rotor assembly having a motor housing and a center shaft disposed in the shaft tube, the central shaft having a bottom portion, the motor housing having a radially extending inner side wall, the bottom portion and the bottom portion a first distance between the abutting end and a second distance between the radially extending inner side wall and the second abutting end, wherein the radially extending inner side wall and the third abutting end are Three distances; a wheel that is tightly coupled to the central shaft; and an elastic member disposed about the central shaft, the elastic member having a maximum compression stroke, the first distance, the second distance, or the third distance being at least One of the less than the maximum compression stroke; wherein the third distance is less than the maximum compression stroke, and the first distance and the second distance are both greater than the third distance. A motor includes: a base having a first abutting end; a shaft tube having a second abutting end and disposed on the base; a certain subset having a third abutting end and disposed on the shaft a rotor assembly having a motor housing and a center shaft disposed in the shaft tube, the central shaft having a bottom portion, the motor housing having a radially extending inner side wall, the bottom portion and the bottom portion a first distance between the abutting end and a second distance between the radially extending inner side wall and the second abutting end, wherein the radially extending inner side wall and the third abutting end are a third distance; and an elastic member disposed around the central shaft, the elastic member having a maximum compression stroke, at least one of the first distance, the second distance or the third distance being less than the maximum compression stroke; The first distance is less than the maximum compression stroke, and the second distance and the third distance are both greater than the first distance. The motor of claim 11, wherein the second abutting end is disposed in an opening of the shaft tube. The motor of claim 11, wherein the base has a bottom plate, and the bottom plate has a protruding portion, and the first abutting end is disposed at the protruding portion. The motor of claim 13, wherein the projection is hollow or solid. The motor of claim 11, wherein the stator assembly comprises a winding sleeve and a coil, the coil is wound around the winding sleeve, and the third abutting end is disposed on the winding sleeve. The motor of claim 11, wherein at least one bearing is disposed in the shaft tube, the elastic member being disposed between the radially extending inner side wall of the motor casing and the at least one bearing. The motor of claim 11, wherein the elastic member is a spring. A motor includes: a base having a first abutting end; a shaft tube having a second abutting end and disposed on the base; a certain subset having a third abutting end and disposed on the shaft a rotor assembly having a motor housing and a center shaft disposed in the shaft tube, the central shaft having a bottom portion, the motor housing having a radially extending inner side wall, the bottom portion and the bottom portion a first distance between the abutting end and a second distance between the radially extending inner side wall and the second abutting end, wherein the radially extending inner side wall and the third abutting end are a third distance; and an elastic member disposed around the central shaft, the elastic member having a maximum compression stroke, at least one of the first distance, the second distance or the third distance being less than the maximum compression stroke; The second distance is less than the maximum compression stroke, and the first distance and the third distance are both greater than the second distance. A motor includes: a base having a first abutting end; a shaft tube having a second abutting end and disposed on the base; a certain subset having a third abutting end and disposed on the shaft a rotor assembly having a motor housing and a center shaft disposed in the shaft tube, the central shaft having a bottom portion, the motor housing having a radially extending inner side wall, the bottom portion and the bottom portion a first distance between the abutting end and a second distance between the radially extending inner side wall and the second abutting end, wherein the radially extending inner side wall and the third abutting end are Three distances; and An elastic member disposed around the central shaft, the elastic member having a maximum compression stroke, at least one of the first distance, the second distance or the third distance being less than the maximum compression stroke; wherein the third distance is less than The maximum compression stroke, and the first distance and the second distance are both greater than the third distance.