JP2006189037A - Electric fan - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dynamically balanced electric fan having a pair of impeller units and capable of reducing vibration generated during operation. <P>SOLUTION: This electric fan includes a motor unit of which axial center projects to both right and left directions; the pair of impeller units which back on each other and are respectively arranged at both ends of the axial center of the motor unit projecting to the both right and left directions so as to send air outwardly in right and left directions in the same rotational direction by the motor unit; and a base mechanism supporting the motor unit from below such that the motor unit can flatly reciprocate. The electric fan is also provided with a support mechanism which comprises a support shaft projecting upwardly from the base mechanism and rotatably and flatly mounted on the base mechanism and a fixation plate supported from below by the support shaft and supporting several points around the center of gravity of the motor unit from below in a balanced manner. The motor unit is supported from below by the base mechanism via the support mechanism. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric fan, and more particularly, to an electric fan that has a pair of impeller devices at the back and can blow air over a wide range of about 360 ° in the left and right directions.

  The conventional electric fan (see FIG. 4) is configured such that the motor device 1 and the impeller device 2 can be reciprocally rotated in a predetermined range with respect to the base mechanism 4 by the swing mechanism 5. However, normally, since it can only turn about 180 degrees to the left and right, it cannot blow air over a wide range (for example, Patent Document 1).

In view of the above, the present inventor has installed a pair of impeller devices with the other one on the back on both ends of the shaft core projecting in both the left and right directions of the motor, and the pair of impeller devices is flat. In addition, a fan that can blow air over a wide range of about 360 ° has been proposed (for example, Patent Document 2). However, in the proposed electric fan, since the motor or the entire motor device is supported by the lower pedestal mechanism via a single-shaft support mechanism, it can be said that there is no problem with static balance. However, due to the rotation in the same direction of the pair of impeller devices at both ends of the shaft core of the motor and the rotation in the left and right directions, the vibration became intense, and the dynamic balance was not good because it fluctuated during operation. .
Japanese Patent Laid-Open No. 07-243395 JP 2004-324640 A

  Therefore, an object of the present invention is to solve the above-mentioned problems of the electric fan having a pair of impeller devices configured as described above, that is, to reduce the vibration generated during operation. It is to provide a good electric fan.

  In order to achieve the above object, the present invention provides a motor device having an axial core projecting in both the left and right directions, the other one behind the other, and the same rotational direction by the motor device in the left and right direction. And a pair of impeller devices installed at both ends of the shaft core projecting in both the left and right directions of the motor device, and the motor device reciprocally in plan view from below. In a fan comprising a pedestal mechanism that is supported so as to be able to rotate, a support shaft that protrudes upward from the pedestal mechanism and that is rotatably mounted on the pedestal mechanism, and the support shaft And a support plate composed of a fixed plate that supports the periphery of the center of gravity of the motor device from below at a good balance, and the motor device is provided via the support mechanism. Providing a fan, characterized in that from below is supported by the pedestal mechanism.

  As an embodiment of the electric fan, the motor device has an outer frame that protects the motor, and the fixing plate is fixed at least on both the left and right sides of the outer frame by a fixing screw. One that is well balanced from below is mentioned.

  A conventional swing mechanism is installed between the pedestal mechanism and the fixed plate so that the motor device and the impeller device can reciprocate in a plane. Is further mentioned.

  The electric fan having the above-described configuration supports the motor device in a balanced manner from below by means of the support mechanism, for example, via the left and right sides of the outer frame, so a pair of impellers at both ends of the motor shaft core. It is possible to reduce vibrations caused by the rotation of the device in the same direction and the rotation in the left-right direction.

  Further, if the motor device and the impeller device can be reciprocally rotated in a planar manner by a conventional swing mechanism, the pair of impeller devices are each 180. In total, it can be rotated over a wide range of 360 °.

  These and other objects, features and advantages of the present invention will become apparent from the following detailed description of three preferred embodiments of the present invention as illustrated in the accompanying drawings. Moreover, the same code | symbol in this specification displays the components which are similar.

  As shown in FIG. 1, the first preferred embodiment of the electric fan of the present invention includes a motor device 10, a pair of impeller devices 20 and 20, a support mechanism 30, a pedestal mechanism 40, and a swing mechanism 50. It is equipped with.

  The motor device 10 includes a motor 15, a shaft core 13 that protrudes in both the left and right directions of the motor 15, and an outer frame 11 that protects the motor 15 and is installed so as to cover almost the whole. The pair of impeller devices 20 and 20 are attached to both ends of the shaft core 13 so that the other ones face each other. Further, since the pair of impeller devices 20 and 20 have impellers 21 and 21 that are twisted in directions opposite to each other, when the motor 15 is operated, the impellers 21 and 21 pass through the shaft core 13. Are driven and rotated in the same direction, but both can blow outward in the left-right direction.

  The support mechanism 30 includes a fixed plate 31 and a support shaft 32. One end of the support shaft 32 protrudes upward from the pedestal mechanism 40 and is attached to the shaft hole 41 of the pedestal mechanism 40 so as to be planarly rotatable around the axis, and the other end is It is fixed at a position below the fixed plate 31 corresponding to the center of gravity of the motor device 10, and supports the fixed plate 31 from below. Two fixing portions 14, 14 configured to receive fixing screws 33, 33 are formed symmetrically around the support shaft 32 on both the left and right sides of the lower surface of the outer frame 11 of the motor device 10. On the other hand, two through holes 313 and 313 are formed above the fixed plate 31 so as to correspond to the fixed portions 14 and 14. The fixing plate 31 is connected to the two fixing portions 14 and 14 by fixing screws 33 and 33. That is, the fixing plate 31 of the support mechanism 30 is supported by the support shaft 32 provided at a position below the fixing plate 31 corresponding to the center of gravity of the motor device 10, and the fixing screws 33 and 33 and the fixing portion 14. , 14, and through holes 313, 313 and the like are fixed on both sides of the outer frame 11 that is symmetrical about the center of gravity of the motor device 10, so that the balance is good and vibration force due to operation is fixed to the fixing plate 31. Vibration can be reduced by evenly transmitting to the whole.

  Further, although the swing mechanism 50 is conventional, the connecting tool 51 and the pedestal mechanism 40 are connected to each other, and the inverted L-shaped mounting plate 52 and the fixed plate bent 90 ° downward. The swing mechanism 50 is installed between the two mechanisms of the pedestal mechanism 40 and the fixed plate 31 so that one end of the base 31 is connected to each other. The swing mechanism 50 is configured to reciprocate and rotate the motor device 10 and the pair of impeller devices 20 and 20 with respect to the pedestal mechanism 40 in a plane. The swinging mechanism 50 restricts the rotatable support shaft 32 of the support mechanism 30 so that it can only rotate within a predetermined range of about 180 ° in the left-right or front-rear direction. Since the pair are arranged symmetrically, if they are 180 ° respectively, they can be rotated over a wide range of 360 ° and blown.

  FIG. 2 is a side partial sectional view showing a second preferred embodiment of the electric fan of the present invention. The only difference between this embodiment and the first preferred embodiment is the structure of the support mechanism 30 'and the structure and installation method of the swing mechanism 50'. The fixing plate 31 ′ of the support mechanism 30 ′ in this embodiment is formed in a U shape, and its upper end is bent so as to be separated from the support shaft 32 ′, and is fixed to the outer frame 11 of the motor device 10. Has been. Thereby, also in this embodiment, the vibration force due to the operation is uniformly transmitted to the entire fixed plate 31 ′, and the vibration can be reduced. The swing mechanism 50 'is connected to one side surface of the fixed plate 31' by an attachment plate 52 'formed in an L shape.

  FIG. 3 is a side partial sectional view showing a third preferred embodiment of the electric fan of the present invention. The only difference between this embodiment and the first preferred embodiment is the structure of the support mechanism 30 "and the structure and installation method of the swing mechanism 50". The fixing plate 31 ″ of the support mechanism 30 ″ in the present embodiment is formed in a U shape, and is bent so that the upper end portion thereof faces the support shaft 32 ″. It is fixed to. Thereby, also in the present embodiment, the vibration force due to the operation can be uniformly transmitted to the entire fixed plate 31 ″ to reduce the vibration. Further, the swing mechanism 50 ″ does not include a mounting plate and is directly connected to the bottom surface of the fixed plate 31 ″.

  In the case of the present invention, for example, in the first preferred embodiment, the fixed plate 31 of the support mechanism 30 is supported by the support shaft 32 provided at a position below the fixed plate 31 corresponding to the center of gravity of the motor device 10. In addition, the fixing mechanism such as the fixing screws 33 and 33, the fixing portions 14 and 14, and the through holes 313 and 313 are fixed on both sides of the outer frame 11 that is symmetrical about the center of gravity of the motor device 10. The vibration force due to the operation can be transmitted uniformly to the entire fixed plate 31, and the pair of impeller devices 20 and 20 at both ends of the shaft core 13 of the motor device 10 can rotate in the same direction and rotate in the left and right directions. Vibration due to movement can be reduced.

  Further, according to the present invention, since the swing mechanism 50 is installed between the two mechanisms of the pedestal mechanism 40 and the fixed plate 31, the pair of impeller devices 20 and 20 are respectively 180 ° and 360 ° in total. It can be rotated over a wide range.

It is side surface fragmentary sectional view which shows 1st preferable embodiment of the electric fan of this invention. It is side surface fragmentary sectional view which shows 2nd preferable embodiment of the electric fan of this invention. It is side surface fragmentary sectional view which shows 3rd preferable embodiment of the electric fan of this invention. It is side surface fragmentary sectional view which shows the conventional electric fan.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motor apparatus 10 Motor apparatus 11 Outer frame 13 Axle core 14 Fixed part 15 Motor 2 Impeller apparatus 20 Impeller apparatus 21 Impeller 30 Support mechanism 30 'Support mechanism 30''Support mechanism 31 Fixed plate 31' Fixed plate 31 '' Fixing plate 313 Through hole 32 Support shaft 32 'Support shaft 32''Support shaft 33 Fixing screw 4 Base mechanism 40 Base mechanism 41 Shaft hole 5 Head swing mechanism 50 Head swing mechanism 50' Head swing mechanism 50 '' Head swing mechanism 51 Connection Tool 52 Mounting plate 52 'Mounting plate

Claims (3)

A motor device whose axial core projects in both the left and right directions;
The shaft cores projecting in both the left and right directions of the motor device so that they can be blown outward in the left and right directions in the same rotational direction by the motor device with the other one on the back A pair of impeller devices installed at both ends of the
In the electric fan comprising a pedestal mechanism that supports the motor device so as to be able to reciprocate in a plane from below,
A support shaft that protrudes upward from the pedestal mechanism and is rotatably mounted on the pedestal mechanism;
A support mechanism comprising a fixed plate that is supported from below by the support shaft and that supports the periphery of the center of gravity of the motor device from below at a good balance, and the motor device is viewed from below via the support mechanism. An electric fan supported by the pedestal mechanism.   The motor device has an outer frame that protects the motor, and the fixing plate is fixed at least on both the left and right sides of the outer frame by fixing screws to support the motor device in a well-balanced manner from below. The electric fan according to claim 1.   2. A swing mechanism is installed between two mechanisms of the pedestal mechanism and the fixed plate, and the motor device and the impeller device can be reciprocally rotated in a plane. The electric fan described in 1.

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