TW201348592A - Cooling fan with dual-shaft - Google Patents

Abstract

A cooling fan with dual-shaft at least comprises a bearing, a rotation shaft, an impeller and a supporting shaft. The bearing comprises an axial hole. The rotation shaft may rotatably penetrate through the axial hole and comprises a through hole. The impeller comprises a hub coupled to the rotation shaft. The supporting shaft penetrates through the through hole of the rotation shaft. The supporting shaft comprises a free end protruded to the hub.

Description

Double shaft cooling fan

The invention relates to a cooling fan, in particular to a double shaft cooling fan including a rotating shaft and a supporting shaft.

As electronic products such as notebook computers or tablet computers tend to be thinner, the cooling fans installed in thin electronic products may have pressure on the components such as the casing or keyboard in the electronic products due to the limitation of the installation space. The risk of the fan wheel of the cooling fan causes the fan wheel to fail to operate normally. As shown in FIG. 1 , a conventional cooling fan 10 is installed in a thin notebook computer, and a casing 21 of the notebook computer is When a force is pressed or deformed, a fan 11 of the cooling fan 10 is forced to press, causing the cooling fan 10 to fail to operate normally, or causing the fan wheel 11 to rub against the casing 21 of the notebook computer to generate an abnormal sound.

The main object of the present invention is to provide a dual-shaft cooling fan including a base, a bearing, a rotating shaft, a fan wheel and a supporting shaft, the bearing is coupled to the base, and the bearing has a shaft hole The rotating shaft rotatably penetrates the shaft hole, the rotating shaft has a through hole, the fan wheel has a hub, the fan wheel is coupled to the rotating shaft by the hub, and the supporting shaft is disposed at the shaft The through hole of the rotating shaft has a free end and a fixed end, and the fixed end is coupled to the base, and the free end protrudes from the hub. The rotating shaft of the double shaft cooling fan is rotatably disposed through the shaft hole of the bearing and the through hole of the supporting shaft is inserted through the rotating shaft, and the free end of the supporting shaft Projecting from the hub of the fan wheel, the fan wheel of the dual-axis cooling fan is rotated by the rotating shaft, and the free end of the supporting shaft protrudes from the hub, so The housing, keyboard or panel of an electronic product such as a notebook computer or a tablet computer is prevented from pressing the fan wheel of the dual-axis cooling fan, so that the dual-axis cooling fan can operate normally.

Please refer to FIG. 2 , which illustrates a first embodiment of the present invention. A dual-axis cooling fan 100 includes a base 110 , a bearing 120 , a rotating shaft 130 , a fan wheel 140 , and a support shaft . 150, a stator 160, a fastening member 170, a oil retaining cover 180, and a wear plate 190, the bearing 120 is coupled to the base 110, the bearing 120 has a shaft hole 121, in the embodiment, the base The housing 110 includes a carrier 111 and a bearing sleeve 112. The bearing sleeve 112 is coupled to the carrier 111. The bearing sleeve 112 has a bottom plate 112a, a wall 112b connecting the bottom plate 112a, and a In the embodiment, the bearing 120 is disposed in the receiving groove 112c of the bearing sleeve 112, and the rotating shaft 130 is rotatably disposed in the bottom plate 112a and the receiving groove 112c. The shaft hole 121 of the bearing 120 has an upper surface 131, a lower surface 132, a through hole 133 extending through the upper surface 131 and the lower surface 132, and an inner side wall 133a surrounding the through hole 133. The fan wheel 140 has a hub 141 and a plurality of blades 142 connected to the hub 141. The fan wheel 140 is defined by the hub 141. The support shaft 150 is disposed in the through hole 133 of the rotating shaft 130. The support shaft 150 has a free end 151, a fixed end 152 and an outer ring wall 153. The fixed end 152 of the support shaft 150 is coupled to the base 110. In the embodiment, the support shaft 150 is non-rotatably disposed through the through hole 133 of the rotating shaft 130. The fixed end 152 is combined. The bearing sleeve 112 of the base 110 is preferably coupled to the bottom plate 112a of the bearing sleeve 112 to increase the bonding strength of the support shaft 150 to the bearing sleeve 112.
Referring to FIG. 2 again, the free end 151 of the support shaft 150 protrudes from the hub 141, and the outer ring wall 153 of the support shaft 150 and the inner side wall 133a of the rotating shaft 130 have a space therebetween. The space D is used to prevent the support shaft 150 from directly rubbing against the rotating shaft 130. The stator 160 is assembled on the outer edge of the cylindrical wall 112b of the bearing sleeve 112 to drive the fan wheel 140 to rotate, in this embodiment. The rotating shaft 130 has an outer side wall 134 and a fastening groove 135 recessed in the outer side wall 134. The fastening component 170 is disposed in the bearing sleeve 112, and the fastening component 170 is fastened. The retaining groove 135 is configured to prevent the fan wheel 140 from being loosened during rotation. The oil retaining cover 180 and the wear plate 190 are disposed in the bearing sleeve 112. In this embodiment, the oil retaining oil is disposed in the bearing sleeve 112. A cover 180 is located above the bearing 120. The fastener 170 is located between the bearing 120 and the oil retaining cover 180. The wear plate 190 is located between the bearing 120 and the bottom plate 112a of the bearing sleeve 112.
Please refer to FIGS. 3 and 4 , which are a second embodiment of the present invention. A dual-axis cooling fan 100 includes a base 110 , a bearing 120 , a rotating shaft 130 , a fan wheel 140 , and a support shaft . 150, a stator 160, a fastening member 170, a oil retaining cover 180 and a wear plate 190, the second embodiment is different from the first embodiment in that the bearing 110 is located on the oil retaining cover 180 and the fastening member Between 170.
Referring to FIG. 4 , the dual-axis cooling fan 100 further includes a cover body A and a first ring wall A1 formed on the cover body A. The cover body A is coupled to a free end 151 of the support shaft 150. The cover body A is located above a hub 141 of the fan wheel 140, and the first ring wall A1 is located between the cover body A and the hub 141. The fan wheel 140 further has a second body formed on the hub 141. The annular wall 143 surrounds the first annular wall A1. The cover A can prevent leakage of lubricating oil and prevent dust from falling between the rotating shaft 130 and the supporting shaft 150, and can be avoided. The housing, keyboard or panel of the electronic article forces the fan wheel 140 of the dual shaft cooling fan 100 to ensure proper operation of the fan wheel 140.
Referring to FIGS. 2, 3 and 4, the bearing 120 of the dual-axis cooling fan 100 and the fixed end 152 of the support shaft 150 are coupled to the base 110, and the rotating shaft 130 is rotatably worn. The shaft hole 121 of the bearing 120, the through hole 133 of the support shaft 150 and the free end 151 of the support shaft 150 protrude from the hub 141, so When the fan wheel 140 is driven to rotate by the stator 160, the rotating shaft 130 is rotatable in the shaft hole 120 of the bearing 120, and the free end 151 of the supporting shaft 150 is inserted through the through hole 133. Projecting from the hub 141, the support shaft 150 can prevent the housing, keyboard or panel of an electronic article such as a notebook computer or tablet from pressing the fan wheel 140 of the dual-axis cooling fan 100, so that the double shaft The rod cooling fan 100 can operate normally.
The scope of the present invention is defined by the scope of the appended claims, and any changes and modifications made by those skilled in the art without departing from the spirit and scope of the invention are within the scope of the present invention. .

10. . . Cooling fan

11. . . Fan wheel

twenty one. . . case

100. . . Double shaft cooling fan

110. . . Pedestal

111. . . Carrier board

112. . . Bearing sleeve

112a. . . Bottom plate

112b. . . Wall

112c. . . Locating slot

120. . . Bearing

121. . . Shaft hole

130. . . Rotating shaft

131. . . Upper surface

132. . . lower surface

133. . . Through hole

133a. . . Inner side wall

134. . . Outer side wall

135. . . Buckle slot

140. . . Fan wheel

141. . . Wheel hub

142. . . Fan blade

143. . . Second ring wall

150. . . Support shaft

151. . . Free end

152. . . Fixed end

153. . . Outer ring wall

160. . . stator

170. . . Fastener

180. . . Oil retaining cap

190. . . Wear-resistant piece

A. . . Cover

A1. . . First ring wall

D. . . Space

Figure 1: Schematic diagram of a conventional cooling fan.
2 is a cross-sectional view showing a double shaft cooling fan according to a first embodiment of the present invention.
Figure 3 is a cross-sectional view showing a double shaft cooling fan in accordance with a second embodiment of the present invention.
Figure 4 is a cross-sectional view showing the dual shaft cooling fan in accordance with a second preferred embodiment of the present invention.

100. . . Double shaft cooling fan

110. . . Pedestal

111. . . Carrier board

112. . . Bearing sleeve

112a. . . Bottom plate

112b. . . Wall

112c. . . Locating slot

120. . . Bearing

121. . . Shaft hole

130. . . Rotating shaft

131. . . Upper surface

132. . . lower surface

133. . . Through hole

133a. . . Inner side wall

134. . . Outer side wall

135. . . Buckle slot

140. . . Fan wheel

141. . . Wheel hub

142. . . Fan blade

150. . . Support shaft

151. . . Free end

152. . . Fixed end

153. . . Outer ring wall

160. . . stator

170. . . Fastener

180. . . Oil retaining cap

190. . . Wear-resistant piece

D. . . Space

Claims (10)

A dual shaft cooling fan comprising:
a pedestal
a bearing coupled to the base, the bearing having a shaft hole;
a rotating shaft rotatably disposed in the shaft hole, the rotating shaft has a through hole;
a wheel having a hub, the wheel is coupled to the rotating shaft by the hub; and a supporting shaft penetrating the through hole of the rotating shaft, the supporting shaft having a free end and a fixed end coupled to the base, the free end projecting from the hub. The dual-axis heat-dissipating fan of claim 1, wherein the base comprises a carrier plate and a bearing sleeve, the bearing sleeve is coupled to the carrier plate, and the bearing is disposed on the bearing sleeve, The fixed end of the support shaft is coupled to the bearing sleeve. The double shaft cooling fan of claim 2, wherein the bearing sleeve has a bottom plate, a cylinder wall connecting the bottom plate, and a receiving groove, the bearing is disposed on the bearing sleeve. a slot, the fixed end of the support shaft being coupled to the bottom plate of the bearing sleeve. The double-shaft cooling fan of claim 2, further comprising a fastening component, the rotating shaft has an outer side wall and a fastening groove recessed on the outer side wall, the fastening component is The bearing sleeve is disposed in the bearing sleeve, and the fastening component is fastened to the fastening groove. The double shaft cooling fan of claim 2, further comprising a oil retaining cover disposed in the bearing sleeve and above the bearing. The double shaft cooling fan of claim 1, further comprising a cover body and a first ring wall formed on the cover body, the cover body being coupled to the free end of the support shaft, The cover is located above the hub, and the first ring wall is located between the cover and the hub. The double-shaft cooling fan of claim 6, wherein the fan wheel further has a second ring wall formed on the hub, the second ring wall surrounding the first ring wall. The double-shaft cooling fan of claim 1, wherein an outer ring wall of the support shaft and an inner side wall of the rotating shaft have a space between them. A dual shaft cooling fan comprising:
a bearing having a shaft hole;
a rotating shaft rotatably disposed in the shaft hole, the rotating shaft has a through hole;
a wheel coupled to the rotating shaft; and a support shaft that is non-rotatably disposed through the through hole of the rotating shaft, the support shaft having a free end protruding from the fan wheel. The double shaft cooling fan of claim 9, further comprising a bearing sleeve disposed on the bearing sleeve, the support shaft having a fixed end opposite to the free end, the fixing The end is coupled to the bearing sleeve.