JP2575861Y2 - Centrifugal projection device directly connected to rotating shaft - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a rotary motor for driving a rotary wheel.
The present invention relates to a centrifugal projector directly connected to a rotation axis of a motor.

[0002]

2. Description of the Related Art Conventionally, a centrifugal projector in which a rotary wheel is directly connected to a rotary shaft of a driving motor is a rotary wheel in which a fine or fine powder of a blast material is rotated from the rotary wheel side. There is a problem that the motor enters the gap between the shaft portion of the hub that directly connects the motor and the rotating shaft of the motor and the fitting cylindrical portion of the lid bracket, and jumps out of the gap to the driving motor side to damage the motor. In view of such a problem, a centrifugal projector disclosed in Japanese Utility Model Laid-Open No. 4-112770 is intended to prevent damage to the motor even if the projection material or fine powder which has become fine in view of such a problem jumps out to the motor side. Suggested. However, such a centrifugal projector has a problem in terms of maintenance such as replacement of parts. That is, when replacing parts, centering of the hub and the lid bracket cannot be visually observed, and it takes a very long time. SUMMARY OF THE INVENTION An object of the present invention is to provide a rotary shaft direct-coupled centrifugal projector capable of preventing damage to a motor due to projection of a fine projection material or fine powder and facilitating maintenance.

[0003]

SUMMARY OF THE INVENTION In order to achieve the above object, a rotary shaft direct-coupled centrifugal projector according to the present invention has a hub with a large outer diameter at the base and a small diameter at the drive motor. The fitting cylinder of the lid bracket has a length whose rear end coincides with the stepped portion of the shaft portion in a state where the lid bracket is fitted to the hub, and is formed on the rotating shaft or the hub. The disk is characterized in that a disk whose periphery is slightly bent toward the rotating hole is fitted and fixed.

[0004]

According to the present invention, by adopting the above-described solution, even if the fine blasting material or fine powder reaching the end of the fitting tube of the lid bracket may fly out, most of the fine blasting material or the fine powder is gravity at the stepped portion. Even if it falls out in the direction of falling and does not reach the motor body, but instead jumps out to reach the motor body, it is reflected and scattered on the high-speed rotating disk, so that the motor is scattered.
It does not enter the gap between the rotor and the rotating shaft to damage the bearing. Also, when replacing the parts of the hub and the lid bracket, the stepped part of the shaft part of the hub becomes the centering reference in the axial direction.
By using a jig or the like, centering and assembling can be easily performed.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. An impeller cover-2 (partially omitted) and a drive motor 3 are disposed at an appropriate interval above the ceiling plate 1 of the cabinet, and a rotary shaft 4 of the drive motor 3 is attached to the impeller cover-2. Extends to the center position of the mounting opening 2A formed in the side surface of. A hub 5 is fitted to the rotary shaft 4 and fastened so as to be integrally rotatable, and a shaft portion 5A of the hub 5 has a stepped portion 5B having a large diameter on the base side and a small diameter on the motor 3 side.
It is shaped. A rotating wheel 8 located inside a protective liner 7 cantilevered in the impeller cover 2 is fixed to a mounting plate portion of the hub 5 by screws, and is directly connected to the rotating shaft 4. ing.

A fitting portion 9A of a splittable bracket 9 is fitted to a large diameter portion of the shaft portion 5A of the hub 5 with a predetermined gap S therebetween so as to be relatively rotatable. The lid bracket 9 covers the mounting opening 2A and is fixed to the impeller cover-2. The rear end of the fitting tube 9A is connected to the hub 5 with the lid bracket 9 fitted thereto.
The length is substantially equal to the stepped portion 5A of A. The labyrinth seal R is formed by the gap S by the splittable lid bracket 9 and the hub 5 at the large diameter portion of the shaft portion 5A of the hub 5.
The configuration is maintained. A disk 10 whose periphery is slightly bent in the direction of the large-diameter portion of the shaft portion 5A is fitted and fixed to the end of the shaft portion 5A of the hub 5 of the rotary shaft 4 (position near the motor 3). In the figure, reference numeral 11 denotes a distributor,
12 is a control cage, and 13 is a shot introducing cylinder.

In such a structure, in a rare case, the fine or fine powder of the blast material that has entered the gap S through the labyrinth seal R jumps out to the driving motor 3 side. In most cases, the motor 3 falls in the direction of gravity at the stepped portion 5B and does not reach the motor 3. Even if it jumps out so as to reach the motor 3 side, it is reflected and scattered on the disk 10 rotating at a high speed and is prevented from reaching the motor 3 to damage the motor 3. Never.
Further, when replacing the parts of the hub 5 and the lid bracket 9, the stepped portion 5B of the hub 5 serves as an axial centering reference, and the centering of the hub 5, the lid bracket 9 and the cover-2 is performed as shown in FIG. By doing so, the centering and assembling work can be easily performed. That is, the assembling operation is performed first by the shaft portion 5A of the hub 5.
Fitting tube 9 of splittable lid bracket 9 with stepped portion 5B
A, the ends of the cover 2 and the drive motor 3
Is fixed. Next, a gap gauge 6 having an appropriate thickness is inserted into the gap S between the shaft portion 5A of the hub 5 and the fitting cylinder 9A of the splittable bracket 9 at a position approximately equal to the circumference of the cover bracket 9, and the cover bracket 9 is rotated.
Adjust and fix. The centering and assembling work can be performed in the manner described above.

[0008]

According to the present invention, as is apparent from the above description, a fine object that has entered the gap between the hub shaft and the fitting tube of the lid bracket falls in the direction of gravity at the step of the shaft and is driven. It hardly reaches the motor side directly, and even if it jumps out so as to reach the motor side, it will be reflected and scattered on the disk rotating at high speed. Will not be damaged. Further, the centering and assembling work involved in exchanging the parts of the hub and the lid bracket can be performed extremely easily, which is remarkable.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal front view showing an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part in FIG.

FIG. 3 is an enlarged view of a main part showing a centered and assembled state.

[Explanation of symbols]

 3 Driving motor 4 Rotary shaft 5 Hub 5A Shaft 5B Stepped portion 6 Clearance gauge 9 Lid bracket 9A Fitting cylinder 10A Disk R Labyrinth seal S Clearance

Claims (1)

(57) [Scope of request for utility model registration] A rotary wheel is directly connected to a rotary shaft of a drive motor via a hub, and a lid bracket having a fitting cylinder is relatively rotatably mounted on the hub to be fitted and fitted to the hub. ,
A centrifugal projector directly connected to a rotating shaft in which the lid bracket is fixed to an impeller cover or a cabinet so as to close an opening thereof. The lid 3 has a stepped portion 5B with a small diameter, and the fitting cylinder 9A of the lid bracket 9 has a stepped end at the rear end of the shaft portion 5A in a state where the lid bracket 9 is fitted to the hub 5. The rotating shaft 4 or the hub 5 is provided with a peripheral portion on the rotating shaft 4 or the hub 5.
Characterized in that a slightly bent disk 10 is fitted and fixed to the side of the rotary shaft,