JPH0742452U - Impeller - Google Patents

Abstract

(57) [Summary] [Purpose] The blade plate is fixed to the blade mounting plate without rattling and the assembly workability is improved. [Structure] A large number of cut grooves 15 into which the blade plates 13 are inserted are formed on the outer peripheral portion of the blade mounting plate 12, and a fixing portion 16 that protrudes inward from one inner edge of the cut groove 15 is formed. Is integrally formed in a raised state. Similarly, the end plate 14 is also provided with the cut groove 17 and the fixing portion 18. A notch 13a is formed in the blade plate 13 at a portion fixed to the blade mounting plate 12 and the end plate 14, and a positioning projection 19 is integrally formed by cutting and raising. The blade 13
The notches 13a are inserted into the inner portion of the cut groove 15 so as to be fitted to each other, and thereafter, the fixing portion 16 is fixed by caulking the fixing portion 16 toward the inside of the cut groove 15 by flattening. The blade plate 13 is fixed to the end plate 14 in the same manner.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an impeller used for, for example, a ventilation fan for a duct.

[0002]

[Prior art]

 For example, a centrifugal multi-blade fan is used for a duct ventilation fan. The impeller of this multi-blade fan is, as shown in part in FIGS. 9 and 10, a metallic circular blade mounting plate 1 attached to a rotating shaft (not shown), and an outer blade mounting plate 1 corresponding to this. A ring-shaped end plate 2 having a diameter is arranged in parallel in the vertical direction in the drawing, and is extended in the vertical direction so as to be bridged between the outer peripheral portion of the blade mounting plate 1 and the end plate 2 in the width direction. A large number of blade plates 3 having a gentle curve are attached.

9 and 10 show a conventional mounting structure of the vane plate 3 to the vane mounting plate 1 and the end plate 2. That is, cut grooves 1a and 2a are formed on the outer peripheral portions of the blade mounting plate 1 and the end plate 2, respectively, by punching, while the cut grooves 1a and 2a are formed on the side portions of the blade plate 3, respectively. Notches 3a, 3a are formed so as to correspond to 2a. Then, the blade plate 3 is inserted into the cut grooves 1a and 2a such that the cutout portions 3a and 3a are fitted to the inner side portions of the cut grooves 1a and 2a, and in this state, the blade mounting plate 1 and the outer peripheral ends of the end plates 2 (open end portions of the cut grooves 1a, 2a) are pressed by the rollers and caulked to the inner peripheral side, so that the blade mounting plates 1 and the end plates 2 are fixed. Has become.

[0004]

[Problems to be solved by the device]

 By the way, in the above-mentioned impeller, the width dimension of the cut grooves 1a, 2a must be larger than the thickness dimension of the blade plate 3, so that the open end portions of the cut grooves 1a, 2a are Even if the caulking is performed, there is a situation that a gap is formed between the inner edge portions of the cut grooves 1a and 2a and the blade plate 3. Therefore, in the above-described conventional configuration, there is a problem in that the blade plate 3 is likely to rattle in the cut grooves 1a and 2a, and so-called chatter noise is likely to occur. Further, since the outer peripheral end portions of the blade mounting plate 1 and the end plate 2 are swaged from the outer peripheral side, the workability in assembling is not so good.

The present invention has been made in view of the above circumstances, and an object thereof is to fix a blade plate to a blade mounting plate without rattling and to improve assembly workability. To provide an impeller.

[0006]

[Means for Solving the Problems]

 In the impeller of the present invention, a fixing portion projecting inward of an inner edge portion of the cut groove is integrally formed on a blade mounting plate having a cut groove, and the blade plate is fixed to the blade mounting plate. It is characterized in that it is fixed to the blade mounting plate by caulking the fixing portion by flattening after inserting it into the notch groove in a state of being raised.

[0007]

[Action]

 According to the above means, the blade plate is caulked and fixed so that the width of the blade groove is narrowed by the fixing portion projecting inwardly of the blade groove of the blade mounting plate. Even if the thickness is large, the blade plate can be fixed without rattling. Further, in this case, since the crimping is performed by the flattening process, the workability is improved.

[0008]

【Example】

 Hereinafter, a first embodiment in which the present invention is applied to an impeller of a centrifugal type multi-blade fan will be described with reference to FIGS. 1 to 3. First, FIG. 3 shows the entire configuration of the impeller 11 according to the present embodiment. Here, the impeller 11 is a metallic disk-shaped blade mounting plate 12 and an outer periphery of the blade mounting plate 12. It is constituted by a large number of blade plates 13 whose middle portion is fixed to the lower part, and a ring-shaped end plate 14 which interconnects and supports the upper ends of the large number of blade plates 13. Although not shown, a boss portion connected to the rotary shaft is provided at the center of the blade mounting plate 12.

Now, the mounting structure of the blade plate 13 to the blade mounting plate 12 will be described in detail with reference to FIGS. 1 and 2. A large number of cut grooves 15 into which the blade plate 13 is inserted are formed on the outer peripheral portion of the blade mounting plate 12 so as to extend so as to be inclined and curved with respect to the radial direction.

The blade mounting plate 12 is integrally formed with a fixing portion 16 that protrudes into the cutting groove 15 from one inner edge of the cutting groove 15 by so-called cutting and raising. The fixing portion 16 is formed such that a portion corresponding to the fixing portion 16 when the punching groove 15 is punched is left and the portion is raised obliquely upward from the plate surface of the blade mounting plate 12. ing.

Further, the end plate 14 is made of a ring-shaped metal plate having an outer diameter equivalent to that of the blade mounting plate 12, and a plurality of cutting plates are provided on the outer peripheral portion thereof similarly to the blade mounting plate 12. Notches 17 are formed, and fixing portions 18 are integrally formed corresponding to the notches 17.

On the other hand, the vane plate 13 is made of a metal plate thinner than the width dimension of the cut groove 15, has a rectangular shape elongated in the vertical direction, and is configured to have a gentle curved shape in the width direction. Then, notches 13a are formed on both side portions of the blade plate 13 so as to be located at the mounting portions to the blade mounting plate 12. Further, in the present embodiment, a positioning projection 19 is integrally formed by so-called cut-and-raised at a central portion of the plate surface of the vane plate 13 and located immediately below the cutout portion 13a.

In the above structure, the blade plate 13 is mounted on the blade mounting plate 12 as follows. That is, first, with respect to the blade mounting plate 12 in which the fixing portion 16 is raised (see FIG. 1A), the blade groove 13 is inserted at an intermediate position near the lower portion of the blade plate 13. At this time, the blade plate 13 is inserted so that the cutouts 13a fit into each other on the inner side of the cut groove 15, and as shown in FIG. By contacting the lower surface of the plate 12, vertical positioning is performed.

Thereafter, the blade mounting plate 12 is flattened so that the fixing portion 16 is caulked so as to narrow the width of the cut groove 15 toward the inside of the lower claw cut groove 15. As a result, the blade plate 13 is fixed to the blade mounting plate 12 by the pressure contact force of the crimped fixing portion 16. Further, during the flat working, the positioning projections 19 of the blade plate 13 are also returned in the direction along the plate surface of the blade plate 13. Although detailed description is omitted, the blade plate 13 is similarly attached to the end plate 14.

According to the present embodiment, the blade plate 13 is caulked and fixed by the fixing portion 16 provided integrally with the blade mounting plate 12 so as to narrow the width of the cut groove 15, so that the cut groove is formed. Even if the width dimension of 15 is larger than the thickness dimension of the blade plate 13, the blade plate 13 can be fixed without rattling. As a result, the blade plate 13 can be fixed to the blade mounting plate 12 without rattling, unlike the conventional one in which chattering noise is generated due to rattling of the blade plate 3. It is possible to reliably prevent chatter noise.

Further, since the fixing portion 16 is crimped by the flattening process, the caulking operation is easier than the conventional configuration in which the outer peripheral end portion of the blade mounting plate 1 is crimped from the outer peripheral side. Therefore, the assembling workability can be improved.

FIG. 4 shows a second embodiment of the present invention. Here, fixing portions 23 and 24 are formed in the cut groove 22 of the blade mounting plate 21 at inner edge portions on both left and right sides. Among them, the fixing portion 23 is raised and the fixing portion 24 is raised downward. Similarly, the end plate 25 is also formed with fixing portions 27 and 28 at inner edge portions on both left and right sides of the cut groove 26. The fixed portions 27, 28 of the end plate 25 are raised in the left and right directions opposite to the fixed portions 23, 24. On the other hand, in this case, the blade plate 29 has a rectangular plate shape that is long in the vertical direction.

Here, a flat die 30 is used for caulking (flat punching) the fixing portions 23, 24 and 27, 28. The flat die 30 includes an intermediate die 31, an upper movable die 32, and a lower movable die 33.

In carrying out the flattening process, first, as shown in FIG. 4A, the blade plate 29 and the end plate 25 are spread slightly above and below the mounting position, and the blade plate 29 is opened. It is inserted into the cut groove 22 and the cut groove 26. Then, in this state, the intermediate mold 31 is arranged between the blade mounting plate 21 and the end plate 25, the upper movable mold 32 is arranged above the end plate 25, and the lower movable mold 33 is arranged on the blade mounting plate 21. The flat die 30 is set so that it is arranged below.

Next, as shown in FIG. 4B, the lower movable die 33 is raised and the upper movable die 32 is lowered at the same time, so that the fixed portions 23, 24 and 27, 28 are flattened. By swaging, the blade plate 29 is fixed to the blade mounting plate 21 and the end plate 25 at the same time. By using such a flat die 30, the blade mounting plate 21 and the end plate 25 can be caulked at the same time.

5 to 8 show a third embodiment of the present invention. As shown in FIG. 8, an impeller 41 according to the present embodiment includes a disc-shaped vane mounting plate 42, and a large number of vane plates 43 whose lower ends are fixed to the outer peripheral portion of the vane mounting plate 42. And a ring-shaped end plate 44 for connecting and supporting the upper ends of the plurality of blade plates 43 to each other. A boss portion 45 to which the rotary shaft is connected is provided at the center of the blade mounting plate 42.

In this case, the outer diameter dimension of the blade mounting plate 42 is configured to be smaller than the outer diameter dimension of the end plate 44 and smaller than or equal to the inner diameter dimension of the end plate 44. Therefore, the blade mounting plate 42 and the end plate 44 can be obtained from a single plate material. Along with this, the blade plate 43 is formed in a so-called stepped shape in which the lower end portion is bent inward.

As shown in FIG. 5 and FIG. 6, a cut groove 46 is formed in the outer peripheral portion of the blade mounting plate 42, and the cut groove 46 is positioned at inner edge portions on both sides of the cut groove 46. Then, the fixing portions 47, 47 are integrally formed. In this case, the left and right fixing parts 47 and 47 are both raised upward. Similarly, a cut groove 48 and fixing portions 49, 49 are also formed on the outer peripheral portion of the end plate 44. On the other hand, notches 43a are formed at both sides of the upper and lower ends of the blade plate 43 at positions where they are attached to the blade mounting plate 42.

In this structure, when the blade plate 43 is attached to the blade mounting plate 42, the lower end portion of the blade plate 43 is inserted into the rear side portion of the cut groove 46 so that the cutout portions 43 a are fitted to each other. Thereafter, by flattening the blade mounting plate 42, as shown in FIG. 7, the fixing portions 47, 47 are caulked downward, that is, inwardly of the cut groove 46, and the blade plate 43 is fixed. It is. Also, the blade plate 43 is attached to the end plate 44 in the same manner.

As a result, similarly to the first embodiment, the blade plate 43 can be fixed to the blade mounting plate 42 without rattling, and chatter noise can be reliably prevented from occurring. As a result, the caulking work becomes easy and the assembling workability can be improved. Further, in the present embodiment, the swaging position of the blade mounting plate 42 and the swaging position of the end plate 44 are displaced from each other in the radial direction. This eliminates the interference of the and makes it possible to further improve the assembly workability.

[0026]

[Effect of device]

 As is apparent from the above description, according to the impeller of the present invention, the blade mounting plate having the cut groove is integrally formed with the fixing portion projecting inwardly of the inner edge of the cut groove, and The plate is fixed to the blade mounting plate by inserting the plate into the notch groove with the fixing part raised from the blade mounting plate and then caulking the fixing part by flattening. Therefore, the blade plate can be fixed to the blade mounting plate without rattling, and the assembling workability can be improved, which is an excellent practical effect.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention and is a vertical cross-sectional front view showing a step of assembling a blade plate in order.

FIG. 2 is an exploded perspective view of essential parts showing a state before attachment of a blade plate.

FIG. 3 is a perspective view showing the entire configuration of an impeller.

FIG. 4 shows a second embodiment of the present invention and is a vertical cross-sectional front view of a main part showing a state of flat punching.

FIG. 5 is a view corresponding to FIG. 2 showing a third embodiment of the present invention.

FIG. 6 is an enlarged vertical sectional front view of a cut groove portion of a blade mounting plate.

FIG. 7 is a perspective view of a main part

FIG. 8 is a vertical cross-sectional view showing the entire configuration of the impeller.

FIG. 9 is a view corresponding to FIG. 2 showing a conventional example.

FIG. 10 is a view corresponding to FIG. 7.

[Explanation of symbols]

In the drawings, 11, 41 are impellers, 12, 21, 42 are blade mounting plates, 13, 29, 43 are blade plates, 13a, 43a are notches, 44, 25, 44 are end plates, 15, 17, 22. ，
26, 46, 48 are notch grooves, 16, 18, 23, 2
4, 27, 28, 47, 49 are fixed parts, and 30 is a flat type.

Claims (1)

[Scope of utility model registration request] 1. A blade mounting plate having a cut groove formed on an outer peripheral portion thereof, wherein the blade plate is inserted into and fixed to the cut groove, wherein the blade mount plate has an inner edge portion of the cut groove. The fixing portion protruding in one direction is integrally formed, and the blade plate is inserted into the cut groove in a state where the fixing portion is raised from the blade mounting plate, and then the fixing portion is flattened. An impeller, which is fixed to the blade mounting plate by being caulked.