JPS58185996A - Impeller inserted from outside and tightened by winding - Google Patents

Abstract

PURPOSE:To use a material piece of one definite shape in common to both kinds of impeller for right-handed and left-handed rotation, by radially arranging the grooves provided on both main board and side board in the radial direction and by expanding both edges of the blade inserting port of a groove. CONSTITUTION:A projection 11 of a blade 3 is formed flat, while grooves 10 for both main board 1 and side board 2 are provided in a radial manner with respect to the center of both the main board 1 and side board 2. Accordingly, the formal relation between the projection 11 of the blade 3 and the groove 10 for both the main board 1 and side board 2 is symmetrical with right and left direction, and this allows a an impeller of one definite shape to be used in common both right-handed and left-handed rotation. In addition, since the both edges of a blade inserting port 14 of the groove 10 are expanded, the curved part of the blade 3 can be remained free from contact with the edge of the port 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an impeller. Specifically, the present invention relates to an impeller with a two-wrap structure in which the blades are inserted outwardly and can be used for both left-handed rotation and right-handed rotation using the same member.

As shown in FIGS. 1 and 2, a conventional impeller has a main plate 1 with a boss 4 fixed to a rivet 5, a side plate 2,
The required number of blades 3 is fixed between the main plate 1 and the side plate 2.
Equipped with. This impeller has a main plate 1 and side plates 2 with through holes 6, and blades 30 with projections 7 on both ends. 1 and the side plate 2 from the axial direction, and the projection 7 is bent to fix the blade 3 between the main plate 1 and the side plate 2.

However, since the projections 7 of the blades 3 are inserted into the main plate 1 and the side plate 2 from the axial direction, this impeller requires a special jig for positioning the blades, making it difficult to assemble automatically.

Therefore, an impeller with blades inserted outwardly as shown in FIGS. 3 and 4 was developed. This impeller is provided with ears 8 for tightening and fixing at both ends of the blades 3, and the blades 3 are placed between the main plate 1 and the side plates 2, and the blades 3 are placed between the main plate 1 and the side plate 2 in the radial direction. The blade 20 and the ear portion 8 are fixed by inserting the blade 20 and wrapping the outer peripheral edges of the main plate 1 and the side plate 2 tightly. However, since this impeller is fixed at the outer ear 8 of the blade 3, there is no fixation on the inside of the blade 3, so it cannot be used in applications with large air volume and pressure, and is only applicable to applications with small air volume and pressure. There is a drawback that it cannot be done.

Therefore, an impeller with a two-wrap structure in which the blades are inserted outwardly and is tightened as shown in FIGS. 5 to 9 was developed. This impeller has a stepped portion 9 on the main plate 1 and side plate 2, and a groove 10 for inserting the blade into the stepped portion 9.

On the other hand, a protrusion 11 for bending and fixing and a lug 12 for tightening and fixing are provided at both ends of the blade 3, respectively. Insert the protrusion 11 of the blade 3 into the groove 10 of the main plate 1 and side plate 2 from the outside in the radial direction of the main plate 1 and the side plate 2, bend and fix the protrusion 11, and then insert the protrusion 11 into the groove 10 of the main plate 1 and side plate 2. 13 to fix the ear part 12. In this impeller, the blades 3 are inserted from the outside in the radial direction of the main plate l and the side plates 2, so that the drawback of the impellers shown in FIGS. 1 and 2, such as difficulty in automatic assembly, can be overcome. can. In addition, since the blade 3 is fixed at the inner protrusion 11 and the outer ear 12, it is possible to overcome the drawback that the impeller shown in FIGS. 3 and 4 is only used for small air volume and wind pressure. . However, in the above impeller, since the blades 3 are provided with protrusions 11 for bending and fixing and ears 12 for tightening and fixing at both ends of the blades 3, and the blades 3 have an arcuate cross section, the main plate 1 and the side plates 2 groove 10 for rotation in the direction of arrow A shown in Fig. 8 (clockwise rotation) and for rotation in the direction of arrow A shown in Fig. 9 (clockwise rotation).
There is a problem in that it requires processing for each purpose.

The present invention relates to an improvement of the above-mentioned impeller with a two-wrap structure in which the blades are inserted outwardly and is intended to provide an impeller that can be used both for left rotation and right rotation using the same member.

The present invention is characterized in that the protrusion of the blade is formed into a flat plate shape, the grooves in the main plate and the side plates are provided radially in the radial direction of the main plate and the side plates, and both sides of the part of the groove on the side of the blade insertion opening are widened. do.

Hereinafter, an embodiment of an impeller with a two-wrap structure in which the blades are inserted outwardly and is tightened according to the present invention will be described with reference to FIGS. 10 to 19.

In the figure, the same reference numerals as in FIGS. 1 to 9 indicate the same parts.

Therefore, in the impeller of the present invention in this embodiment, the protrusions 11 at both ends of the blades 3 are pressed flat to form a flat plate shape, and the grooves 10 in the main plate l and side plates 2 are formed in the radial direction of the main plate l and side plates 2. In addition, both sides of the portion 14 of the groove 10 on the blade insertion port side are widened.

Note that the main plate 1 is drawn to improve its strength.

Since the impeller of the present invention in this embodiment has the above-mentioned configuration, that is, the projections 11 of the blades 3 are formed in a flat plate shape, so that the blades 3 can be turned left and right as shown in FIGS. 17 and 18. Even in terms of orientation, the protrusions 11 of the blades 3 have a flat plate shape and have no left or right orientation. On the other hand, since the grooves 10 in the main plate 1 and the side plates 2 are provided radially in the radial direction of the main plate 1 and side plates 2, that is, radially from the center of the main plate 1 and side plates 2,
As shown in FIG. 15, it is symmetrical. Therefore, feather 3
There is no left or right difference between the protrusion 11 and the groove lO of the main plate 1 and side plate 2, and they are the same members (main plate 1, side plate 21 blade 3).
) can be used for both left and right rotation. Furthermore, #1
Since I expanded both sides of the part 140 on the side of the blade insertion port of 0,
Even if the blade 3, which has an arcuate cross section, is turned left and right in the opposite direction, the curved surface portion of the blade 3 can escape to the left and right.

Then, the protrusion 11 of the blade 3 is inserted into the groove l of the main plate 1 and the side plate 2.
Once inserted into O, the protrusion 11 is bent, and the outer periphery of the main plate 1 and side plate 2 is further tightened to fix the ear portion 12.

As is clear from the above embodiments, the impeller of the present invention with the blades inserted outwardly and has a two-roll fastening structure can be used for both left rotation and right rotation using the same member.

[Brief explanation of drawings]

FIGS. 1 and 2 are a partial front view and a partial sectional view of a conventional plug-in impeller. 3 and 4 are a partial front view and a partial sectional view of a conventional winding type impeller. Figures 5 to 9 show a conventional impeller with a two-wrap structure in which the blades are inserted from the outside. FIG. 8 is a partially enlarged front view for right rotation, and FIG. 9 is a partially enlarged view for left rotation. 10 to 19 show an embodiment of the impeller of the present invention with a two-wrap structure in which the blades are inserted outwardly, and FIG. 10 is a partial sectional view, FIG. 11 is a partial front view for clockwise rotation, and FIG. Figure 12 is a partial front view for left rotation, Figure 13 is a partially enlarged front view, Figure 14 is a partial perspective view, Figure 15 is a partial front view of the main plate or side plate, and Figure 16 is a partial front view of the main plate or side plate. FIG. 17 is a front view of the blade for left rotation, FIG. 18 is a front view of the blade for clockwise rotation, and FIG. 19 is a partial perspective view of the blade. 1...Main plate, 2...Side plate, 3...Blade, 4...
Boss, 10...Groove, 11...Protrusion, 12...Ear portion, 13...Outer periphery, 14...Both sides of groove. Agent Patent Attorney Toshinori Usuda 1st Firm ￥! l Z Figure 37
η↓(2) δ 5th ward 6th VI7 (2) ¥J 8 mouth 3 9th mouth 10th 11th (2) ¥i/Z
(2) ''A 13 Figure ¥14 Figure 13'' 15th Figure 16

Claims (1)

[Claims] It is equipped with a main plate to which a boss is attached, a side plate, and an appropriate number of blade limits fixed between the main plate and the side plate, and a stepped portion is provided on the outer circumference of the main plate and the side plate, and a groove for inserting the blade is provided in the stepped portion. On the other hand, a protrusion for fixing the bending and an ear for fixing the winding are provided at both ends of the blade, and the protrusion of the blade is inserted into the groove of the main plate and the side plate from the outside in the radial direction of the main plate and the side plate, and the blade is bent. In an impeller with a two-wrap structure in which the blades are inserted outwardly and fixed by wrapping the main plate and the outer peripheral edges of the main plate and the side plates to secure the ears of the blades, the protrusions of the blades are formed into a flat plate shape; The grooves in the main plate and the side plates are provided radially in the radial direction of the main plate and the side plates, and both sides of the blade insertion opening side of the grooves are widened, so that the same member can be used for both left rotation and right rotation. This is an impeller with a two-wrap structure where the blades are inserted outward.