JPS581619B2 - high speed rotating body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-speed rotating body composed of a thin-walled shell, an end plate, and a shaft.

FIG. 1 shows a conventional high-speed rotating body.

Since a high-speed rotating body is required to have an extremely high circumferential speed, high-strength steel, extra-super duralumin, or the like is used as the material for the end plate 1 integrated with the thin-walled body 4 in terms of strength.

On the other hand, since the stress acting on the shaft 2 portion, which has a relatively low circumferential speed, is small, it is not necessary to use the same material as the end plate 1.

Furthermore, the shaft 2 is relatively long and thin. For this reason, the end plate 1 and the shaft 2 are manufactured separately and are connected by bolts 3.

Since a three-bolt connection is employed, the end plate 1 has conventionally been manufactured by machining from a forged material, which has the drawback of extremely poor productivity and material yield, making mass production impossible.

Therefore, the present invention was made with the object of providing a high-speed rotating body that eliminates the above-mentioned conventional drawbacks.

Next, the present invention will be specifically explained based on first to third embodiments shown in FIGS. 2 to 5.

First, in FIGS. 2 and 3 of the first embodiment, a cylindrical portion 5 is provided by bending the inner peripheral portion of the end plate 1, and a fitting surface is provided on the inner surface of the cylindrical portion 5.

The shaft 2 is also provided with a cylindrical portion 6, and its outer peripheral surface is provided with a fitting surface and a recess 7 as a stop portion.

Both cylindrical portions 67 are fitted with an appropriate fitting allowance (press fit, shrink fit, cold fit, or a combination thereof).

FIG. 3 shows a conceptual diagram of the deformed state when the end plate 1 and shaft 2 are each rotated independently.

As you can see, if the shapes (diameter, length, wall thickness) of the end plate 1 and the cylindrical parts 5 and 6 of the shaft 2 are appropriately selected, it is of course possible to prevent a decrease in the initial tightening force when mating. On the other hand, in a centrifugal force field, the tightening force can be increased, and there is no fear of the end plate 1 coming off or disassembling.

The reason why the recess 7 is provided at the positioning point in the 1st direction of the shaft is to prevent the generation of axial force due to deformation during rotation, as there is a concern that the mating surface will move relative to the axial direction if a large axial force is generated. It is something.

It is possible to connect the end plate 1 (thin wall) and the shaft 2 by press forming, which is excellent in mass production, and has higher productivity than the conventional bolt connection method.

In addition, since no bolts are required, the number of parts is reduced, the reliability of the device is improved, the weight is considerably reduced compared to the conventional method, and the rotational characteristics are improved because the fitting surface is completely centered.

In the second embodiment shown in FIG. 4, the cylindrical parts 5 and 6 are formed inside the rotating body, and in the third embodiment shown in FIG. It is fixed by
Since the rest is the same as the first embodiment, explanations of the other structures, operations, and effects will be omitted here.

As described above in detail based on the first to third embodiments, the present invention includes a thin-walled body, an end plate integrated with the thin-walled body at both ends of the thin-walled body, and a center of the end plate. In a high-speed rotating body consisting of a shaft fixed to a part, a cylindrical part is provided at an inner peripheral part of the end plate approximately at the center and an outer peripheral part of the shaft, and the cylindrical parts are fitted together and fixed together. Due to the high-speed rotating body, the end plates can be press-formed, making mass production possible, increasing productivity.Compared to conventional products, bolts are not required, reducing the number of parts and improving reliability. The object of the present invention is to provide a high-speed rotating body that can be lightweight, and has improved rotational characteristics because a cylindrical portion is provided to form a core.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of a conventional high-speed rotating body, FIG. 2 is a front sectional view of a first embodiment based on the present invention, FIG. 3 is an enlarged view of section A in FIG. 2 during rotation, and FIG. 4 and 5 are front sectional views of the second and third embodiments, respectively. 1... End plate, 2... Shaft, 3... Bolt, 4... Thin body, 5, 6...
Cylindrical part, 7... Recess, 8... Welding.

Claims (1)

[Claims] 1. In a high-speed rotating body consisting of a thin-walled body, an end plate integrated into the thin-walled body at both ends of the thin-walled body, and a shaft portion fixed to the center of the end plate, the inner part of the end plate is located approximately at the center of the body. The periphery and
A high-speed rotating body, characterized in that a cylindrical part is provided on the outer peripheral part of the shaft part, and the cylindrical parts are fitted and fixed to each other.