JPS6145358Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an electric fan that is provided with a wind direction changing plate in front of the fan that is rotated by the wind pressure of the fan.

[Conventional technology]

Conventionally, there are electric fans that use the wind pressure of the fan to change the direction of the air blowing from the fan.
As shown in No. 2824429, a wind direction changing plate is rotatably provided in front of the air blowing direction of the fan, and the wind direction changing plate is changed by the wind from the fan hitting the propulsion blades formed on the outer periphery of the wind direction changing plate. In some cases, as shown in U.S. Patent No. 3,481,534, wind pressure from a fan acts on each blade of the wind direction changing plate, causing the wind direction changing plate to change. Those that rotate and can change the direction of air flow, and as shown in U.S. Patent No. 3,173,478, a large number of vertically arranged blades are installed in parallel using the rotational force of a rotating body that rotates due to the wind pressure of a fan. There are some that swing all at once, allowing the direction of the air from the fan to be varied.

However, in the above-mentioned electric fans, etc., the wind direction is changed by directly using the wind pressure of the fan, but when the wind direction changing plate or rotating body rotates at high speed in synchronization with the fan,
The air from the fan is wasted to rotate the wind direction changing plate and rotating body, making it impossible to obtain the desired air flow.
A deceleration mechanism is required to decelerate these rotations.

Here, in the above-mentioned U.S. Patent No. 2,824,429, the amount of deceleration of the wind direction changing plate, that is, the rotation speed, is adjusted by adjusting the amount of air blown to the propulsion blade of the wind direction changing plate. If a wind direction change plate is placed immediately before the wind direction change plate, the wind direction change plate rotates at high speed because the torsional wind from the fan acts on each blade of the wind direction change plate, which becomes a propulsion blade. For this reason, a brake mechanism that applies some kind of braking to the wind direction changing plate is required.

Therefore, in the past, for example,
As shown in the publication, a gear mechanism that rotates in conjunction with the wind direction changing plate is housed in a gear box, and
A gear box is filled with a liquid in which at least a part of the gear mechanism is immersed, and the resistance of the liquid is used to apply braking to the gear mechanism, causing the wind direction changing plate, which would otherwise rotate at high speed due to wind pressure, to rotate at a low speed.

[Problem that the invention attempts to solve]

However, when changing the direction of air blowing from a fan, it is usually necessary for practical purposes to adjust the changing speed. Although it is possible to change the rotation speed by changing the wind pressure on the wind direction changing plate by changing the rotation speed of the fan, there is a problem that the rotation speed of the wind direction changing plate cannot be adjusted with the same amount of air blown.

Therefore, the technical problem of this invention is to reduce the speed of the wind direction changing plate that rotates due to the wind pressure of the fan, and to also make it possible to vary the rotational speed even with the same amount of air blown from the fan.

[Means for solving problems]

This device includes a fan, a wind direction change plate located in front of the fan and rotated by the wind pressure of the fan, and a gear that rotates in conjunction with the rotation axis of the wind direction change plate and is eccentric with respect to the axis of the rotation axis. a gear mechanism, a storage box that is rotatably provided around the rotation axis and that stores and holds the gear mechanism and whose rotation angle is manually adjusted; It is an electric fan that is partially immersed in liquid.

[Effect]

Next, the operation of the above means will be explained.

The wind direction changing plate, which tries to rotate at high speed in synchronization with the rotation of the fan due to the wind pressure of the fan, is decelerated because a part of the gear mechanism linked to the rotating shaft is immersed in the liquid and receives a braking force from the liquid. , rotate at low speed. When the storage box containing this gear mechanism is manually rotated around the rotation axis, the gear mechanism is also rotated around the rotation axis, and the immersion position of gears etc. in the liquid that are eccentric to the rotation axis is adjusted. As the amount changes, the resistance that the gear mechanism receives from the liquid, that is, the braking force, changes, and the deceleration force that the wind direction changing plate receives changes.

〔Example〕

Next, this invention will be explained in detail with reference to drawings showing one embodiment thereof.

(Configuration of the embodiment) In the drawing, 1 is the main body of the electric fan and is a housing with an open front.The housing 1 has a motor mounting recess 2 in the center and a storage case 4 for a switch 3 etc. on the top surface. Legs 6 for stably supporting the housing 1 are formed on the lower surface of the notch 5, and air suction grilles 7 are formed on the rear surface and both side surfaces. 8 is a fan motor whose rear half is inserted into the recess 2 and fixed in the housing 1; 9 is a motor support plate with a fitting hole 10 for the motor 8 transparently provided in the center; It is fixed by a screw 12 to a boss 11 protruding from the periphery of the recess 2, and the rear half of the motor 8 is inserted into the fitting hole 10 of the support plate 9.
The support plate 9 and the flange 15 of the motor 8 are simultaneously fixed to the boss 13 protruding from the circumferential side of the recess 2 with screws 14, and the motor 8 is inserted into the recess 2.
is attached to case 1.

Reference numeral 16 denotes a rotating shaft 17 of the motor 8, which is installed inside the housing 1.
A fan 18, which is fixed and rotated, is a back cover that closes the bottom opening of the storage case 4. After the switch 3 and the capacitor are fixed in the storage case 4, the back cover 18 is attached. Reference numeral 19 denotes an elastic body fixed to the lower surface of the rear end portion 20 of the leg portion 6 with a screw 21, and when the electric fan is placed on the floor, the elastic body 19 comes into contact with the floor surface. Reference numeral 22 denotes the front end of the leg 6. An engagement hole 23 for engaging and holding a locking tongue protruding from the lower surface of the front frame, which will be described later, is formed on the upper surface of the front end 22. Legs 2 that can be raised freely on the underside
4 is pivotally mounted, and by raising the leg body 24, the center of air blowing of the electric fan can be slightly turned upward. Reference numeral 25 denotes a reinforcing plate attached to the upper part of the back of the recess 2. A keyhole-shaped wall hanging hole is provided through the reinforcing plate 25 and the back wall, and the rear end surface of the rear end 20 of the leg 6 and The rear surface of the back wall of the recessed part 2 is formed on the same plane, and the fan can also be used as a wall hanging by inserting the head of a screw screwed into the wall into the wall hanging hole.

Reference numeral 26 denotes a front frame detachably attached to the front surface of the casing 1, and the engagement tongue piece 27 on the lower surface of the front frame 26 is engaged with the engagement hole 23 and held. 28 is a wind tunnel formed inside the front frame 26 for efficiently sending air from the fan 16; 29 is a cylindrical mounting part supported by a support piece 30 from the wind tunnel 28 in the center of the wind tunnel 28; The frame 28, the wind tunnel 28, the mounting part 29, and the support piece 30 are integrally formed, and the mounting part 2
The front edge of No. 9 is bent inward.

Reference numeral 31 designates a storage box for a gear mechanism, which will be described later, which is rotatably installed in the mounting portion 29. As shown in FIG. ', and is sealed by a ring-shaped gasket 34, and the storage box 31 is inserted into the mounting part 29 from the rear, and the front peripheral edge of the storage box 31 is brought into contact with the front edge of the mounting part 29. There is. Reference numeral 35 denotes a mounting plate that is applied to the rear surface of the storage box 31 and is attached to the rear end edge of the mounting portion 29 with screws 36, and the convex portion 37 at the rear of the storage box 31 is connected to the through hole 35 in the center of the mounting plate 35. ', thereby rotatably supporting the storage box 31.

38 is a lid body 33 which is stored and supported in the storage box 31.
The gear mechanism 38 is a gear mechanism interlocked with a rotating shaft 39 that protrudes further to the front, and the gear mechanism 38 includes a first gear 40 that rotates integrally around the rotating shaft 39,
0 and is eccentric with respect to the axis of the rotating shaft 39.
a second gear 42 rotating integrally with the first coupling gear 41 on the same axis;
a second connecting gear 43 meshing with the gear 42 and eccentric to the axis of the rotating shaft 39;
and an impeller 44 that rotates integrally with the same axis as the final gear, and the impeller 44 of the final gear is shown in FIG.
As shown in b, it is formed by cutting and raising a part of a disc into a triangular shape. Note that the rotating shaft 39 is attached to the mounting portion 2.
9, and the storage box 31 is located at the center of the rotation axis 3.
It is rotatable around 9.

45 and 46 are fixed to the box body 32 and the gears 4
0, 41, 42, 43, and a support plate that pivotally supports each rotating shaft of the impeller 44, and 47 is a V-shaped ring that seals the rotating shaft 39 and the shaft hole 33' of the lid 33. 47 is fitted onto the rotating shaft 39, and the lip portion 47' on the front periphery of the ring 47 is fitted into the shaft hole 39.
It is elastically abutted against the circumferential surface of 2'. 48
4 is a liquid such as oil that is sealed in the storage box 31 and has a certain degree of viscosity in which a part of the gear mechanism 38 is immersed;
Reference numeral 9 indicates a pair of pins implanted in the rotation shaft 39, and reference numeral 50 indicates four engaging protrusions integrally formed on the front surface of the lid body 33 and formed in an arc shape centered on the rotation shaft 39. The protrusion 50 is formed with uneven teeth 50'.

Reference numeral 51 denotes a fan boss rotatably inserted into the rotating shaft 39 from the front, and as shown in FIG.
However, in the center part there is a support part 53 of the wind direction changing plate, which will be described later.
A threaded portion 54 to be screwed into a spinner, which will be described later, is provided at the front part.
each formed. Reference numeral 55 denotes an annular engagement portion provided on the outer periphery of the rear end of the support portion 53 and engaged with the aforementioned engagement projection 50. The engagement portion 55 includes teeth 55 that mesh with the teeth 50' of the engagement projection 50. ' is formed. 56 is a spring provided between the fan boss 51 and the pin 49 to hold the engaging portion 55 in a position where it is separated from the engaging protrusion 50;
The engaging portion 55 and the spring 56 constitute a rotation mechanism 57 that rotates the storage box 31. Reference numeral 58 denotes an E-ring for preventing the fan boss 51 from coming off, which is fitted into the annular groove 39' at the tip of the rotating shaft 39.

Reference numeral 59 denotes a wind direction changing plate which is inserted into the support part 54 of the fan boss 51 from the front, is located in front of the fan 16, and rotates by the wind pressure of the fan 16, and has a rectifying blade 60 extending in the radial direction in the center.
In addition, an inclined changing blade 61 for changing the direction of air blowing is provided on the outside of the straightening blade 60, and the inclination of the changing blade 61 increases from the blade 61a on one side toward the blade 61b on the other side. It is formed so that its slope becomes large. 62 is a spinner for fixing the wind direction changing plate 59 which is screwed onto the threaded portion 54 of the fan boss 51 after the wind direction changing plate 59 is attached, and the spinner 62, the wind direction changing plate 59 and the fan boss 51 are integrated by the spinner 62. is,
These are rotated together by the rotating shaft 39 by engagement between the pin 49 and the notch 52.

(Operation of example) Next, the operation of the above embodiment will be explained.

When the fan motor 8 is driven to rotate the fan 16 in the state shown in FIG. 2, the wind direction changing plate 59 is rotated by the wind pressure from the fan 16, and the wind direction is changed in accordance with the rotation of the wind direction changing plate 59. Wind is blown over a wide area.

At this time, the wind direction changing plate 59 tries to rotate at high speed in synchronization with the rotation of the fan 16, and each gear 40, 41, 4 of the gear mechanism 38 linked to the rotating shaft 39
2 and 43 and the impeller 44 also try to rotate at high speed, but the liquid 48 sealed in the storage box 31 acts as a resistance to the impeller 44 and the like trying to rotate at high speed. That is, in this state, as shown in FIGS. 6 and 7, the gears 42, 43 and the impeller 44 are immersed in the liquid 48 in the storage box 31, and the impeller 44 absorbs the liquid 48 by its rotation. Stirring, this acts as a brake, gears 40, 41, 4
Since braking is applied to 2, 43 and the impeller 44,
The wind direction changing plate 59 is decelerated and rotated at a low speed.
Furthermore, as is clear from Fig. 7, this state is as follows.
Since the impeller 44 is immersed most deeply in the liquid 48, its braking force is large, and the wind direction changing plate 59 is rotated at the slowest speed.

Next, the aforementioned driving is stopped, and the front surface of the spinner 62 is manually pressed backward against the bias of the spring 56, the engaging portion 55 is engaged with the engaging protrusion 50, and in this state, the spinner When 62 is manually rotated, the storage box 31 is rotated about the rotating shaft 39 via the fan boss 51, the engaging portion 55, and the engaging protrusion 50. For example, change this rotation to the right direction.
90 degrees and stop pressing the spinner 62,
The spring 56 causes the engagement portion 55 to engage the engagement protrusion 5.
Leave from 0.

Then, as described above, when the fan 16 is rotated, the wind direction changing plate 59 is rotated, but in this state, the gear mechanism 38 becomes as shown in FIG. No immersion,
Since only the lower part of the first gear 40 is immersed, its braking force is very small, and the wind direction changing plate 59
is rotated at relatively high speed.

Furthermore, by appropriately adjusting the rotation angle of the storage box 31, the amount of liquid 48 immersed in the impeller 44 can be adjusted, and the deceleration force received by the wind direction changing plate 59 can be varied. It also becomes possible to adjust the rotation speed steplessly.

[Effect of idea]

As described above, according to the electric fan of this invention, the braking force that the gear mechanism receives from the liquid, that is, the deceleration force of the wind direction changing plate, can be varied by rotating the storage box that houses and holds the gear mechanism. This has the unique effect of being able to vary the rotational speed of the wind direction changing plate, which is rotated by the wind pressure, even with the same amount of air blown from the fan.

[Brief explanation of the drawing]

The drawings show one embodiment of the electric fan of this invention, FIG. 1 is a perspective view, FIG. 2 is a cutaway side view, FIG. 3 is a cutaway side view of the main parts, and FIG. 4 is a perspective view of the fan boss.
Figure 5 is a front view of the storage box, Figure 6 is a cutaway side view of Figure 5, Figure 7 is a front view of the storage box with the lid removed, and Figures 8a and b are front views of the impeller. FIG. 9 is a front view of the storage box corresponding to FIG. 7 rotated by 90 degrees. 16... Fan, 31... Storage box, 38... Gear mechanism, 39... Rotating shaft, 44... Impeller, 48
...Liquid, 59...Wind direction change plate.

Claims (1)

[Claims for Utility Model Registration] A fan, a wind direction change plate located in front of the fan and rotated by the wind pressure of the fan, and a wind direction change plate that rotates in conjunction with the rotation axis of the wind direction change plate and is aligned with the axis of the rotation axis. A gear mechanism having an eccentric gear, and a storage box that is rotatably provided around the rotation axis and that houses and holds the gear mechanism and whose rotation angle is manually adjusted;
and a liquid sealed in the storage box in which a part of the gear mechanism is immersed. The electric fan according to claim 1, wherein the final gear of the gear mechanism is formed by an impeller.