JP4101600B2 - Impeller attachment / detachment device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an impeller attaching / detaching device capable of attaching / detaching an impeller without using a tool or the like.
[0002]
[Prior art]
A conventional fan mounting device includes a boss portion provided with a plurality of slits in the axial direction of a rotating shaft, and a metal connecting cylinder provided with an axial slit in a shape fitted and mounted on the outer periphery of the boss portion. A fan is attached by coupling (for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Utility Model Publication No. 62-31798 (page 3-5, FIGS. 1 and 2)
[0004]
[Problems to be solved by the invention]
In this conventional fan mounting device, a slot and a hole engaging with the pin are provided in order to reinforce the strength of the fitting hole provided with the resin boss that engages with the pin provided on the rotating shaft. Since the metal connecting tube is coupled to the boss portion, there is a problem that the fan cannot be removed by being sandwiched by the fingertip, and it is required that the fan can be removed by a simple operation sandwiched by the fingertip.
[0005]
This invention solves the said subject, and it aims at providing the attachment or detachment apparatus of the impeller which can remove an impeller by the easy operation | work which pinches | interposes with a fingertip.
[0006]
[Means for Solving the Problems]
The impeller attachment / detachment device according to the present invention moves the holding portion by pressing the blade portion provided with the boss portion engaged with the blade rotation prevention portion provided on the rotating shaft, the holding portion held by the rotating shaft, and pressing. A pair of blade lock portions formed integrally with the pressing portions to be pressed, and a blade frame portion connecting the blade lock portion to the blade portion side, and the pair of holding portions forming the pair of blade lock portions in holding said rotary shaft, a detachable device configuration as the impeller attaching and detaching the impeller to release the holding force of the holding portion by an operation of sandwiching the pressing portion of the boss portion to the rotating shaft The vane detent portion with which the engaging portion engages and the concave groove with which the holding portion engages are provided, and the pair of holding portions and the pressing portion each have a substantially U-shaped cross section so as to surround the rotation shaft. Formed in a letter shape, the pair of holding portions are Provided on the surface side so as to sandwich the concave groove of the rotating shaft, and provided with the blade locking portion that releases the holding force of the holding portion by sandwiching the pressing portion with a fingertip, and the blade locking portion is disposed on the blade It is configured to be attached to the blade part side through a frame part .
[0007]
According to the present invention, it is possible to provide an impeller attachment / detachment device that can remove an impeller by a simple operation that is sandwiched between fingertips.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, the blade portion provided with the boss portion that engages with the blade rotation preventing portion provided on the rotating shaft, the holding portion held on the rotating shaft, and the holding by pressing. A pair of blade lock portions that are integrally formed with a pressing portion that moves the blade portion, and a blade frame portion that connects the blade lock portion to the blade portion side, and forms the pair of blade lock portions. An impeller attaching / detaching device configured to hold the rotating shaft by the holding portion and release the holding force of the holding portion by an operation of sandwiching the pressing portion to attach and detach the impeller. A cross-sectional shape is provided so that the blade detent portion engaged with the engaging portion of the boss portion and a concave groove engaged with the holding portion are provided, and the pair of holding portions and the pressing portion surround the rotating shaft in each of the pair of holding portions and the pressing portion. The U-shaped A portion is provided so as to sandwich the concave groove of the rotating shaft on the inner surface side, the blade lock portion that releases the holding force of the holding portion by sandwiching the pressing portion with a fingertip, and the blade lock portion is provided. Since the blade wheel is attached to the blade portion via the blade frame portion, the impeller attached by the blade lock portion pinches the pressing portion of the blade lock portion inward so that the holding portion is detached from the rotation shaft. It has the effect | action that an impeller can be attached or detached without using a tool.
[0009]
Embodiments of the present invention will be described below with reference to FIGS.
[0010]
(Embodiment 1)
As shown in FIG. 1 to FIG. 4, the blade detent portion 6 and the concave groove 7 that prevent the rotation by engaging the engaging portion 5 of the boss portion 4 provided on the blade portion 3 with the rotating shaft 2 of the electric motor 1. A holding portion 8 and a pressing portion 9 which are provided and engaged with the concave groove 7 are formed in a substantially U shape so as to surround the rotating shaft 2, and a pair is provided so as to face each other. Is engaged with the concave groove 7 of the rotating shaft 2, and the holding portion 8 provided integrally with the pressing portion 9 is pressed by sandwiching and pressing the pressing portion 9 inside the rotating shaft 2 on the axial center side. The blade locking portion 10 is provided so that the holding portion 8 moves away in the moving direction of the portion 9, the holding portion 8 is detached from the concave groove 7, and the holding force of the holding portion 8 is released, and the blade locking portion 10 is attached to the blade portion 3. Provided integrally with the blade frame 11.
[0011]
Then, the blade locking portion 10 and the blade frame part 11, formed by a separate part and a boss portion 4 which is a member that engages the blade portion 3 and blade rotation stopper 6.
[0012]
Further, the tip of the rotating shaft 2 is provided with a taper 2a having a small diameter on the tip side so that the boss part 4 and the blade lock part 10 of the blade blade part 3 can be easily inserted.
[0013]
In the above configuration, when the impeller is attached, the boss portion 4 provided on the blade portion 3 is fitted to the rotating shaft, and the engaging portion 5 provided on the boss portion 4 is engaged with the blade rotation preventing portion 6 provided on the rotating shaft 2. At the same time, while the holding portion 8 of the blade lock portion 10 is opened by the tip portion of the rotating shaft 2, the rotating shaft 2 is held by the elastic force of the holding portion 8 while being guided to the concave groove 7 of the rotating shaft 2. The impeller is attached so as not to fall off the rotating shaft 2.
[0014]
Next, when removing the impeller, by pressing the pressing portion 9 inward with the fingertip, the holding portion 8 provided integrally with the pressing portion 9 moves in a direction away from the concave groove 7 of the rotating shaft 2. Thus, the impeller can be removed.
[0015]
As described above, in the impeller attaching / detaching device according to the first embodiment of the present invention, the blade portion 3 provided with the boss portion 4 that engages with the rotation preventing portion 6 provided on the rotating shaft 2 and the rotating shaft 2 are held. A blade lock portion 6 integrally formed with a holding portion 8 and a pressing portion 9 that moves the holding portion by pressing, and a blade frame portion that connects the blade lock portion 6 to the blade portion 3 side. 11 and is configured to release the holding force of the holding unit 8 and to attach and detach the impeller by holding the rotary shaft 2 with the pair of holding units 8 and sandwiching the pressing unit 9. The holding portion 8 expands by pressing inwardly, the holding on the rotating shaft 2 can be released, and it is possible to remove it by picking it with a fingertip and pulling it forward, so that the blade lock portion 10 has a small space. It can be done by car. Further, when the impeller is contaminated by dust or the like during operation, it is possible to cope with the impeller so that it can be easily attached and detached.
[0016]
Further, the rotating shaft 2 is provided with a vane detent portion 6 for engaging the engaging portion 5 of the boss portion 4 and a concave groove 7 for engaging the holding portion 8 so that the holding portion 8 and the pressing portion 9 are substantially U-shaped. A pair of holding portions 8 are formed so as to hold the concave groove 7 of the rotating shaft 2 on the inner surface side, and a blade lock portion 10 is released by which the holding force of the holding portion 8 is released by holding the pressing portion 9 with a fingertip. Since the blade lock portion 10 is provided on the blade portion 3 side via the blade frame portion 11, the attachment / detachment operation is easy and the impeller can be attached / detached easily.
[0017]
In addition, since the members of the blade lock unit 10, the blade frame unit 11, the blade unit 3, and the blade rotation prevention unit 6 are configured as separate parts, it is possible to select an optimal material for the function of each member.
[0018]
(Embodiment 2)
As shown in FIG. 5, the holding portion 8A and the pressing portion 9A are provided only on one side, the holding portion is not provided on the other side, and the fixing portion 12 facing the pressing portion 9A on one side is provided to provide the blade lock portion 10A. The structure is formed and connected to the blade frame portion 11A.
[0019]
In the above configuration, the holding part 8A on one side is held by the rotating shaft 2A and the impeller is attached. When removing the impeller, one of the fingertips is applied to the pressing part 9A and the other fingertip is fixed to the fixing part 12. The holding portion 8A is detached from the rotating shaft 2A in conjunction with the pressing portion 9A on one side, the lock is released, and the impeller can be removed.
[0020]
Thus, according to the impeller attachment / detachment device of Embodiment 2 of the present invention, the holding portion 8A and the pressing portion 9A are provided only on one side, and the fixing portion 12 facing the pressing portion 9A is provided on the other side. Since the blade lock portion 10A is formed and connected to the blade frame portion 11A, the structure is simplified and the structure is optimum for a lightweight impeller.
[0021]
【The invention's effect】
As is clear from the above embodiments, according to the present invention, the blade portion provided with the boss portion engaged with the rotation preventing portion provided on the rotating shaft, the holding portion held by the rotating shaft, and pressing. A blade lock portion provided integrally with a pressing portion for moving the holding portion by means of a blade frame portion and a blade frame portion connecting the blade lock portion to the blade portion side, and the rotation by the pair of holding portions. Since it is configured to remove the impeller by releasing the holding force of the holding portion by holding the shaft and sandwiching the pressing portion, the impeller can be removed by pinching the pressing portion with a fingertip and pulling it forward. An impeller attaching / detaching device that can be used even with an impeller having a small space in the impeller lock portion can be provided.
[0022]
In addition, the rotating shaft is provided with a blade anti-rotation portion that engages with the engaging portion of the boss portion and a recessed groove that engages the holding portion, and the holding portion and the pressing portion are formed in a substantially U shape, and the pair of holding portions are Provided on the inner surface side to sandwich the concave groove of the rotating shaft, provided with a blade lock part that releases the holding force of the holding part by pinching the pressing part with the fingertip, and the blade lock part via the blade frame part Since it is configured to be attached to the side, even a small impeller can be easily attached and detached with few parts.
[0023]
Further, since the members of the blade lock portion and the blade frame, and the blade portion and the blade rotation prevention portion are configured by separate parts, it is possible to select a material optimal for the function of each member.
[0024]
In addition, since the holding part and the pressing part are provided only on one side and the fixing part opposite to the pressing part is provided on the other side to form the blade lock part and connected to the blade frame part, the structure is simplified and the lightweight impeller This is the optimal configuration.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a blade lock portion of an impeller attachment / detachment device according to Embodiment 1 of the present invention. FIG. 2 is a front view showing the configuration of the impeller attachment / detachment device. FIG. 4 is an exploded perspective view of a ventilation fan provided with the impeller attaching / detaching device. FIG. 5 is a front view showing the structure of the impeller attaching / detaching device according to Embodiment 2 of the present invention. Explanation of]
2 Rotating shaft 3 Blade part 4 Boss part 5 Engagement part 6 Blade rotation prevention part 7 Groove 8 Holding part 8A Holding part 9 Pressing part 9A Pressing part 10 Blade locking part 10A Blade locking part 11 Blade frame part 11A Blade frame part 12 Fixed part

Claims (2)

A blade portion provided with a boss portion that engages with a vane detent portion provided on the rotating shaft, a holding portion held on the rotating shaft, and a pressing portion that moves the holding portion by pressing are integrally formed. A pair of blade lock portions, and a blade frame portion connecting the blade lock portion to the blade portion side, the pair of holding portions forming the pair of blade lock portions is held on the rotating shaft, a detachable device configuration as the impeller attaching and detaching the impeller to release the holding force of the holding portion by an operation of sandwiching the pressing portion, the blade engaging part of the boss portion is engaged with the rotary shaft a detent portion, said providing a groove for engagement of the holding portion, said pair of holding portions and the pressing portion is formed substantially in a U-shape in cross-sectional shape so as to surround the rotary shaft in each of the pair holding portion is the concave of the rotating shaft on the inner surface side The provided so as to sandwich, the wing locking portion holding force is released of the holding portion by sandwiching the pressing portion with a fingertip is provided, said blade locking portion to said blade portion side through the blade frame part An impeller attaching / detaching device characterized by being configured to be attached. And the blade locking portion and the blade frame part, the blade part and the blade rotation stopper detaching apparatus for an impeller according to claim 1, wherein constituted by separate parts and a boss portion which is a member for engagement.

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