JPH0542697U - Fan swing mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a swinging mechanism of an electric fan capable of reliably preventing the output shaft of the swinging motor from tilting by reinforcing the support structure of the bearing. [Structure] A swing motor 4 is mounted on the upper surface of a mounting plate 3, and an output shaft 4a of the swing motor 4 is projected to the lower surface side of the mounting plate 3 to drive the output shaft 4a and a fan of a fan. In which a crank mechanism is provided between the fan motor 1 and the fan motor 1 to reciprocally rotate the output shaft 4a into a reciprocating motion through the crank mechanism. The fitting hole 15 is formed in the base plate 11, and the fitting hole 1 is formed in the mounting plate 3.
5 is formed, a fitting hole 26 is formed in the bottom surface of the concave portion 25, a cylindrical bearing 16 is arranged inside the concave portion 25, and the outer periphery of one end of the bearing 16 is fitted into the concave portion 25. The outer periphery of the other end is press-fitted into the fitting hole 26 and fixed to the fitting hole 15, and the output shaft 4 a is inserted into the bearing 16.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a swinging mechanism of an electric fan that repeatedly changes the direction of the electric fan to the left and right.

[0002]

[Prior Art]

 The structure of the swinging mechanism of the electric fan is shown in FIG. 3, 1 is a fan motor, and a fan (not shown) of the electric fan is attached to the fan motor 1 to rotate. The fan motor 1 is supported via the shaft portion 2a of the neck piece 2 so as to be rotatable about its axis.

A swing motor 4 is attached to the back surface of the fan motor 1 via a mounting plate 3, and an output shaft 4a of the swing motor 4 projects to the lower surface side of the mounting plate 3 and a projecting end of the output shaft 4a. The crank body 5 is attached to the.

The crank body 5 has a connecting portion 6 which is eccentric with respect to the output shaft 4a at an end portion on one end side, and a horizontally extending arm 7 is integrally formed at a lower portion of the fan motor 1. A connecting pin 8 is provided at the end of the arm 7 and is eccentric to the shaft 2a of the neck piece 2.

A connecting rod 9 is bridged between the connecting pin 8 of the arm 7 and the connecting portion 6 of the crank body 5, and the connecting rod 9 has an end portion on one end side that rotates to the connecting pin 8. The other end is rotatably connected to the connecting portion 6, which constitutes a crank mechanism.

When the swing motor 4 is activated in this state and the crank body 5 rotates, the connecting portion 6 revolves around the rotation center of the crank body 5, and the revolving operation of the connecting portion 6 causes the connecting rod 9 to rotate. Reciprocatingly moves, and the reciprocating motion of the connecting rod 9 causes the fan motor 1 to make a reciprocating rotation, that is, a swinging motion about the shaft portion 2a of the neck piece 2, whereby the direction of the fan of the fan is repeated right and left. Is converted.

The structure of the swing motor 4 is shown in FIG. 4, and 10 is a case, a metal base plate 11 is attached to the lower surface of the case 10, and the base plate 11 is joined to the upper surface of the mounting plate 3, It is fixed to the mounting plate 3 by screws 12 shown in FIG.

A motor main body 13 is housed in the case 10, a fitting hole 15 is formed in the main plate 11 by burring, and a cylindrical bearing 16 is press fitted into the inner circumference of the fitting hole 15. The output shaft 4a is rotatably supported by being inserted into the bearing 16, and an output gear 17 is provided at the upper end of the output shaft 4a. A support shaft 18 is integrally projectingly provided on the upper end surface of the output shaft 4a, and the support shaft 18 is rotatably supported by being fitted into a support hole 20 formed in a coil bobbin 19 of the motor body 13. ..

A reduction gear mechanism 21 is provided between the rotation shaft 13 a of the motor body 13 and the output gear 17 of the output shaft 4 a, and the rotational force of the rotation shaft 13 a of the motor body 13 is generated by the reduction gear mechanism 21 and the output. It is transmitted to the output shaft 4a via the gear 17, whereby the output shaft 4a rotates at a low speed, and the rotation causes the fan motor 1 to perform a swinging motion.

[0010]

[Problems to be solved by the device]

 As described above, the crank mechanism is driven by the rotational force of the output shaft 4a of the swing motor 4 to swing the fan motor 1. When driving the crank mechanism, the output of the swing motor 4 is A bending force is applied to the shaft 4a. Also, when the user rotates the fan motor 1 by force, an excessive bending force is applied to the output shaft 4a.

However, in the conventional configuration, since the bearing 16 through which the output shaft 4a is inserted is merely supported by the peripheral edge of the fitting hole 15 formed in the base plate 11, bending of the output shaft 4a is prevented. The bearing 16 tilts together with the output shaft 4a due to an external force, and as a result, the smoothness of the operation of the swing motor 4 is impaired, which may cause noise or malfunction.

The present invention has been made in view of such a point, and its purpose is to reinforce the support structure portion of the bearing to surely prevent the output shaft of the swing motor from tilting. It is to provide a swinging mechanism of an electric fan capable of

[0013]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention attaches a swing motor to one plate surface of a mounting plate, projects the output shaft of this swing motor to the other plate surface side of the mounting plate, A crank mechanism is provided between the output shaft and a fan motor that drives a fan of the fan, and the rotational movement of the output shaft is converted into reciprocating movement through the crank mechanism to reciprocally rotate the fan motor. In the above, a fitting hole is formed in the base plate of the swing motor joined to the mounting plate, a recess facing the fitting hole is formed in the mounting plate, and a fitting hole is formed in the bottom surface of the recess. A cylindrical bearing is arranged inside the recess, and the outer circumference of one end of this bearing is press-fitted into the fitting hole and the outer circumference of the other end is press-fitted into the fitting hole. The output shaft is inserted.

[0014]

[Action]

 In such a configuration, one end of the bearing is supported by the periphery of the fitting hole formed in the base plate, and the other end is supported by the periphery of the fitting hole formed in the recess of the mounting plate. Therefore, even if an external bending force is applied to the output shaft supported by the bearing, the bearing is not stably displaced, and the output shaft is securely prevented from tilting.

[0015]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The parts corresponding to those of the conventional structure are designated by the same reference numerals, and the description thereof will be omitted.

A first embodiment is shown in FIG. 1, and a mounting plate 3 to which a swing motor 4 is mounted has a recess 25 formed by drawing at a portion facing the fitting hole 15 of the main plate 11. There is. A fitting hole 26 is formed in the center of the bottom surface of the recess 25.

A step portion 27 is formed on the outer periphery of the lower end portion of the bearing 16 press-fitted into the fitting hole 15 of the main plate 11, and the outer periphery of the step portion 27 is press-fitted into the fitting hole 26 of the recess 25. , It is fixed by crimping. The output shaft 4a is inserted into the bearing 16 and is rotatably supported.

In such a configuration, the upper end of the bearing 16 is defined by the periphery of the fitting hole 15 formed in the base plate 11, and the lower end is defined by the periphery of the fitting hole 26 formed in the recess 25 of the mounting plate 3. The bearings 16 are respectively supported, that is, the bearings 16 are supported at two points above and below the bearings 16. Therefore, even if an external bending force is applied to the output shaft 4a, the bearings 16 are not stably displaced, and therefore the output shaft 4a is Is surely prevented, so that the output shaft 4a always rotates smoothly and no noise or malfunction occurs. Even when an external force is applied to the bearing 16 downward via the output shaft 4a, the step portion 27 formed at the lower end portion of the bearing 16 is engaged with the peripheral edge of the fitting hole 26. The external force is received by the fitting hole 26, so that the downward displacement of the bearing 16 is reliably prevented.

A second embodiment is shown in FIG. 2. In the second embodiment, the inner diameter of the recess 25 formed in the mounting plate 3 is fitted to the main plate 11 by burring. The outer diameter of the burring wall 15a of the hole 15 is substantially the same as that of the burring wall 15a, and the burring wall 15a is press-fitted into the inner circumference of the recess 25.

In such a configuration, the burring wall 15a of the fitting hole 15 is reinforced by the inner peripheral surface of the recess 25, so that the upper end portion of the bearing 16 is more firmly supported and the output shaft 4a is tilted. Even more reliably prevented. The swing motor is not limited to being attached to the fan motor, but may be attached to a neck piece, a fan base, or the like.

[0021]

[Effect of the device]

 As described above, according to the present invention, the support structure of the bearing can be reliably reinforced, and therefore, the tilt of the output shaft of the swing motor supported by this bearing can be reliably prevented and the bearing can always operate smoothly. There is an advantage that can be made.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a swing mechanism according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a swing mechanism according to a second embodiment of the present invention.

FIG. 3 is a side view of a conventional swing mechanism.

FIG. 4 is a partial cross-sectional view of the swing mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Fan motor 3 ... Mounting plate 4 ... Swing motor 5 ... Crank body 11 ... Base plate 15 ... Fitting hole 16 ... Bearing 25 ... Recess 26 ... Fitting hole

Claims (1)

[Scope of utility model registration request] 1. A swinging motor is mounted on one plate surface of a mounting plate, and an output shaft of this swinging motor is projected toward the other plate surface side of the mounting plate to drive the output shaft and a fan of a fan. In which a crank mechanism is provided between the fan motor and the fan motor, and the rotational movement of the output shaft is converted into reciprocating movement through the crank mechanism to reciprocally rotate the fan motor. A fitting hole is formed in the bottom plate of the motor, a recess facing the fitting hole is formed in the mounting plate, a fitting hole is formed in the bottom surface of the recess, and a cylindrical bearing is formed inside the recess. The outer circumference of one end of the bearing is press-fitted into the fitting hole and the outer circumference of the other end is press-fitted into the fitting hole, and the output shaft is inserted into the bearing. A swinging mechanism for a fan.