CN203476823U - Hand-held hair dryer and fan assembly thereof - Google Patents

Abstract

The utility model provides a hand-held hair dryer, which comprises a casing, a channel assembly accommodated in the casing, and a blowing pipe connected with the channel assembly. The channel assembly includes a channel connected with the casing and a A fan assembly connected by duct, the fan assembly includes a motor, a fan and a fan fixing assembly, the fan fixing assembly includes a central piece, a first fastening element and a second fastening element, the fan is mounted to the center On the part, the central part has a first part and a second part which are respectively fastened to the first and second fastening elements and an inner hole connected to the output shaft of the motor. The fan of the hand-held hair dryer of the utility model is better fixed on the output shaft of the motor, which effectively improves the reliability of fan installation, and also avoids the danger caused by the fan falling off from the output shaft of the motor when rotating at high speed.

Description

Hand-held hair dryer and its fan assembly

technical field

The utility model relates to a hand-held hair dryer and a fan assembly thereof.

Background technique

The fan components in traditional tools such as hand-held hair dryers, blowers, and vacuum cleaners are generally connected through an interference fit between the fan hub and the motor output shaft, so that the fan may fall off and fail if the fit is not reliable during the high-speed rotation of the motor. In the hand-held hair dryer, the fan is the main moving part of the hair dryer. If the fan and the motor shaft are not fixed reliably, it will fall off during use, resulting in failure or even being blown out of the hair dryer, causing injury and accidents, which will greatly affect the use of the hair dryer. security.

Contents of the invention

The purpose of the utility model is to provide a hand-held hair dryer with high safety and reliability.

In order to achieve the above purpose, the present invention provides a hand-held hair dryer, which includes a housing, a duct assembly accommodated in the housing, and a blow pipe connected to the duct assembly, the duct assembly includes a duct assembly connected to the housing A channel and a fan assembly connected to the channel, the fan assembly includes a motor, a fan and a fan fixing assembly, characterized in that the fan fixing assembly includes a central piece, a first fastening element and a second fastening element, The fan is mounted on the central piece, and the central piece has first and second parts respectively fastened to the first and second fastening elements and an inner hole connected to the output shaft of the motor.

Further, the inner hole is collinear with the central axis of the fan, and the output shaft of the motor has a top end provided with external threads on the outer surface, and the output shaft of the motor is connected with the internal thread of the central part through the external threads at the top end. Hole threaded connection.

Further, the first and second parts of the center piece are respectively arranged at both ends of the center piece, the first fastener is a nut, and the first part of the center piece has an external thread connected with the nut .

Further, the central piece further includes a middle part that is pluggably connected with the fan, and the second part extends from the middle part to form a cross-sectional cone shape.

Further, a conical through hole having the same size as the cross-sectional cone of the second part of the central piece is provided inside the second fastening element.

Further, the main body of the second fastening element forms a "T"-shaped cylindrical structure, the diameter of the upper part of which is larger than the diameter of the lower part.

Further, the fan includes a hub insertably installed on the middle part of the central piece and a plurality of blades installed on the hub.

Further, the bottom of the hub forms an opening with a predetermined depth and a diameter different from the inner diameter of the hub, and the diameter of the opening is larger than the diameter of the upper part of the second fastening element.

The utility model also provides a fan assembly which is reliable in installation and effectively prevents the fan from falling off.

To achieve the above purpose, the utility model provides a fan assembly, including a fan, a motor and a fan fixing assembly, characterized in that: the fan fixing assembly includes a central piece, a first fastening element and a second fastening element, The fan is mounted on the central piece, and the central piece has first and second parts respectively fastened to the first and second fastening elements and an inner hole connected to the output shaft of the motor.

Further, the inner hole is collinear with the central axis of the fan, and the output shaft of the motor has a top end provided with external threads on the outer surface, and the output shaft of the motor is connected with the internal thread of the central part through the external threads at the top end. Hole threaded connection.

Further, the first and second parts of the center piece are respectively arranged at both ends of the center piece, the first fastener is a nut, and the first part of the center piece has an external thread connected with the nut .

Further, the central piece also includes a middle part that is pluggably connected with the fan, the second part extends from the middle part to form a cross-sectional cone shape, and the inside of the second fastening element is provided with a The cross-sectional cone of the second part of the central piece has the same size as the conical through hole, and the main body of the second fastening element forms a "T"-shaped cylindrical structure, the diameter of the upper part is larger than the diameter of the lower part.

Further, the fan includes a hub insertably installed on the middle part of the central piece and a plurality of blades installed on the hub, the bottom of the hub forms an opening with a predetermined depth and a diameter different from the inner diameter of the hub. A hole having a diameter greater than the diameter of the upper portion of the second fastening element.

In the fan fixing assembly of the hand-held hair dryer of the utility model, the fan is connected with the output shaft of the motor through the center piece, so that the fan is better fixed on the output shaft of the motor, effectively improving the concentricity of the fan installation and improving the reliability of the fan installation At the same time, it also prevents the fan from falling off from the motor shaft when it rotates at high speed. The hand-held hair dryer using the above-mentioned fan fixing assembly solves the failure and injury accidents caused by the fan falling off, and improves the safety and reliability of the hair dryer.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of a hand-held hair dryer in an embodiment of the present invention;

Fig. 2 is a front view of the hand-held hair dryer in the embodiment of the present invention after part of the housing is removed;

Fig. 3 is a perspective view of the channel assembly of the hand-held hair dryer in the embodiment of the present invention after removing part of the channel and the connecting pipe;

Fig. 4 is a cross-sectional view of the duct assembly of the hand-held hair dryer in the embodiment of the present invention.

Detailed ways

In order to understand the technical content of the present utility model more clearly, specific implementation methods are given and described as follows in conjunction with the accompanying drawings.

Please refer to Fig. 1 and Fig. 2, as the hand-held hair dryer 10 of embodiment of the present utility model, comprise housing 11, air inlet box 12, handle 13, control assembly 14, battery 15, channel assembly 17 and blowing pipe 19, wherein The duct assembly 17 and the battery 15 are respectively located on both sides of the housing 11 , the handle 13 is arranged on the housing 11 , the housing 11 is connected to the blowing pipe 19 through the duct assembly 17 , and the air inlet box 12 is located inside the housing 11 .

Please refer to FIG. 3 and FIG. 4 at the same time, the channel assembly 17 includes a connecting pipe 170 connected to the blowing pipe 19 , a channel 171 connected to the casing 11 and a fan assembly 18 connected to the channel 171 . The fan assembly 18 includes a motor 172, a fan 173 and a fan fixing assembly (not shown). The motor 172 is connected to the trigger (not shown) on the control assembly 14 through wires. The connecting pipe 170 and the channel 171 are engaged with each other. 170 and the channel 171 are provided with a support ring 174 for accommodating the motor 172 , the motor 172 is installed in the support ring 174 , and the fan 173 is connected with the output shaft of the motor 172 . A number of divergent air guiding ribs 175 are integrally formed in the connecting pipe 170 and the channel 171. One end of the air guiding rib 175 is connected to the inner wall of the connecting tube 170 or the channel 171, and the other end is connected to the support ring 174. At least A channel 176 through which the wires of the power supply motor 172 pass is arranged on one air guiding rib 175 . The fan fixing assembly is used to fix the fan 173 on the motor output shaft 1721 . It can be understood that if the length of the bypass 171 is sufficient, the support ring 174 and the air guide rib 175 can be directly arranged on the bypass 171 without connecting the pipe 170 .

The fan fixing assembly of the present invention will be described in detail below. The fan fixing assembly includes a central piece 181, a first fastening element 182 and a second fastening element 183. The two ends of the central piece 181 are respectively provided with a first part 1811 and a second part. 1813, wherein the peripheral surface of the first part 1811 extending out of the fan hub 1731 is provided with an external thread (not shown in the figure), and the first fastening element 182 is screwed with it through an internal thread (not shown in the figure), where the first fastening The fixing element 182 is a nut. It can be understood that the screw fastening method between the nut 183 and the first part 1811 of the central member 181 in the above embodiment can also be replaced by other methods well known to those skilled in the art, such as a collar Groove structure. In addition, the fan fixing assembly further includes a spacer 184 disposed between the first fastening element 182 and the top surface of the fan hub 1731 .

The central part 181 also includes a middle part 1812, the middle part 1812 is arranged as a cylinder, its size is the same as the inner diameter of the fan hub 1731, so the central part 181 can be inserted into the hub 1731 of the fan 173, the central part The second part 1813 of the 181 extends from the end of the middle part 1812 to form a truncated cone shape (not shown), the diameter of its bottom surface is larger than the diameter of the middle part 1812, and correspondingly, the second fastening element The central portion of 183 has a through hole, and its inner wall forms a conical through hole (not shown) with the same size as the cone of the second part of the central part 1813, and the second fastening element 183 is connected to the center through the conical through hole. On the second part 1813 of the member 181, the main body of the second fastening element 183 forms a "T"-shaped cylindrical structure, the diameter of the upper part of which is larger than the diameter of the lower part.

In the embodiment of the present utility model, the fan 173 is an axial flow fan, which includes a hub 1731 that can be installed on the middle part 1812 of the central member 181, and a plurality of blades 1732 that are installed on the hub 1731, wherein the blades 1732 and the hub 1731 It can be integrally formed, or assembled together after separate forming. An opening (not shown) with a predetermined depth and a diameter different from the inner diameter of the hub is formed at the bottom of the fan hub 1731 , and the diameter of the opening is larger than the diameter of the upper part of the second fastening element 183 .

An inner hole 1814 is opened on the bottom of the central piece 181 toward the middle part 1812. In this embodiment, the inner hole 1814 is a blind hole, and the size and type of the inner hole can also be designed according to actual needs. The motor output shaft 1721 has an end, and an external thread (not shown) is formed on the peripheral surface of the end. The motor output shaft 1721 is inserted into the inner hole 1814 of the central member 181, and is formed at a corresponding position in the inner hole 1814. The inner thread (not shown in the figure) constitutes a threaded connection, and the inner hole 1814 is collinear with the central axis of the fan 173 to ensure the concentricity of the fan 173 installation.

The specific installation method of the fan 173 in the utility model is described in detail below. In order to fix the fan 173 on the motor output shaft 1721, firstly, the second fastening element 183 is inserted into the second part 1813 of the center piece 181 and passed through the conical cross section. The conical surface on the body is matched with the conical through hole on the second fastening element 183, the hub 1731 of the fan 173 is inserted into the middle part 1812 of the center piece 181, and then the motor output shaft 1721 is inserted into the center piece 181. The inner hole 1814 is fastened by screwing the external thread on the top of the motor output shaft 1721 to the inner hole 1814 inside the center piece, and finally the gasket 184 and the first fastening element 182 are installed on the first part 1811 of the center piece 181 Fasten the connection. At this time, the fan 173 presses the upper part of the second fastening element 183 through the upper surface of the hole at the bottom of the hub 1731. The second fastening element 183 cooperates with the inner conical surface to tighten the central part 181. Finally, the central part 181 hugs the motor output shaft 1721 to realize fixing. Through the above-mentioned installation method of the fan fixing assembly 18, the fan 173 is better fixed on the motor output shaft 1721, which effectively improves the concentricity of the fan installation, improves the reliability of the fan installation, and also prevents the fan from falling off when it rotates at high speed. .

In another embodiment of the present utility model, an external thread (not shown) is provided on the outer surface of the motor output shaft 1721 close to the second part 1813 of the central part. When the second part 1813 of the central part is holding the motor The corresponding area of the output shaft 1721 can be directly locked on the thread and fixed by the friction of the thread, so that even if no thread connection structure is provided at the end of the motor output shaft 1721, the fan can be effectively prevented from loosening.

In the embodiment of the present utility model, the motor 172 is a brushless DC motor, and the fan 173 is driven by the motor 172. One end of the fan 173 near the handle 13 is provided with a cowl 177, and the cowl 177 is installed on the center piece 181 by a screw 178. 172 is connected to one end of the fan 173 near the blowing pipe 19. Since the fan 173 is an axial fan, after the air flow enters the fan 173 through the blowing channel, it passes through the air guide rib 175 axially under the action of the fan 173, and flows into the blowing pipe 19 . The fan assembly in the embodiment of the present invention is applied to a hand-held hair dryer, and of course it can also be applied to different types of tools as required, such as a blower, a vacuum cleaner, and the like.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the utility model belongs can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the present utility model should be defined by the claims.

Claims (13)

1. A hand-held hair dryer, comprising a housing, a duct assembly accommodated in the housing and a hair pipe connected to the duct assembly, the duct assembly includes a duct connected to the housing and a duct connected to the duct A connected fan assembly, the fan assembly includes a motor, a fan, and a fan fixing assembly, characterized in that: the fan fixing assembly includes a central piece, a first fastening element and a second fastening element, and the fan is installed on the On the center piece, the center piece has first and second parts respectively fastened to the first and second fastening elements and an inner hole connected to the output shaft of the motor. 2. The hand-held hair dryer according to claim 1, characterized in that: the inner hole is collinear with the central axis of the fan, the output shaft of the motor has a top end with an external thread on the outer surface, and the motor The output shaft is threadedly connected with the inner hole of the center piece through the outer thread at the top. 3. The hand-held hair dryer according to claim 1, characterized in that: the first and second parts of the center piece are respectively arranged at both ends of the center piece, the first fastening piece is a nut, and the The first part of the central piece has an external thread connected with the nut. 4. The hand-held hair dryer according to claim 1, wherein the central piece further comprises a middle part pluggably connected with the fan, and the second part extends from the middle part to form a cross-sectional cone shape. 5. The hand-held hair dryer according to claim 4, wherein a conical through hole having the same size as the cross-sectional cone of the second part of the central member is provided inside the second fastening element. 6. The hand-held hair dryer according to claim 5, wherein the main body of the second fastening element forms a "T"-shaped cylindrical structure, the diameter of the upper part of which is larger than the diameter of the lower part. 7. The hand-held hair dryer of claim 1, wherein the fan includes a hub insertably mounted to the middle portion of the center piece and a plurality of blades mounted to the hub. 8. The hand-held hair dryer according to claim 7, wherein the bottom of the hub forms an opening with a preset depth and a diameter different from the inner diameter of the hub, and the diameter of the opening is larger than that of the second fastening element The diameter of the upper part. 9. A fan assembly, comprising a fan, a motor, and a fan fixing assembly, characterized in that: the fan fixing assembly includes a center piece, a first fastening element and a second fastening element, and the fan is mounted to the center On the part, the central part has a first part and a second part which are respectively fastened to the first and second fastening elements and an inner hole connected to the output shaft of the motor. 10. The fan assembly according to claim 9, characterized in that: the inner hole is collinear with the central axis of the fan, the output shaft of the motor has a top end with an external thread on the outer surface, and the output shaft of the motor The shaft is threadedly connected with the inner hole of the central piece through the outer thread at the top end. 11. The fan assembly according to claim 9, characterized in that: the first and second parts of the center piece are respectively arranged at both ends of the center piece, the first fastener is a nut, and the The first part of the central piece has an external thread connected with the nut. 12. The fan assembly according to claim 9, wherein said center piece further comprises a middle portion pluggably connected to said fan, said second portion extending from the middle portion to form a cross-sectional cone shape, the inside of the second fastening element is provided with a conical through hole with the same size as the cross-sectional cone of the second part of the central piece, and the main body of the second fastening element forms a "T" shaped cylinder A structure whose upper part has a larger diameter than the lower part. 13. The fan assembly of claim 9, wherein the fan includes a hub insertably mounted to the middle portion of the center piece and a plurality of blades mounted to the hub, the bottom of the hub An opening having a predetermined depth and a diameter different from the inner diameter of the hub is formed, the opening having a diameter greater than the diameter of the upper portion of the second fastening element.

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