JPS61121743A - Rotor for squirrel-cage induction motor - Google Patents

Abstract

PURPOSE:To make the operation section of a measuring instrument memorize the reference position and angle of work exactly, by providing the detecting element of the reference position and angle for one section in the peripheral direction of a rotor provided with a rotor core and an end ring for the secondary conductor. CONSTITUTION:An unbalance detection apparatus is provided with a vibration detection table7, a belt 8 for work driving for rotating a rotor 6 for work, and a correcting position and angle detection camera 9 for a measuring instrument. On the unbalance detection apparatus, the rotor 6 for work is provided for the vibration detection table 7, and the rotor 6 is rotated via the belt 8 for work driving, and the photograph for the memory is taken with the detection camera 9. Then, the position and angle for the balance correction can be exactly and easily detected, based on a concave groove 5 for making the rotor 6 the detecting element of a reference position and angle.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a rotor of a bottle-shaped induction motor, and particularly to a method for replacing a calculated corrected position angle on a workpiece in a rotor balance correction work. [Background of the Invention] In order to automate the balance correction work of the rotor of a layered induction motor, it is necessary to correct the calculation of the measuring machine. When attempting to replace the position angle on the workpiece, it is necessary to store the reference position angle of the workpiece in the calculating section of the measuring machine.

By the way, Figs. 4 and 5 show the Utility Model No. 571155
43 shows a rotor of a conventional induction motor disclosed in US Pat.

The rotor shown in this figure includes a rotor shaft 1, a rotor core 2, an end ring 3 as a secondary conductor, and a plurality of protrusions 4 for balance correction.

However, this conventional rotor does not have a means for detecting the reference position angle of the rotor as a workpiece at the initial stage of assembly. Therefore, after assembling the rotor, marks for detecting the reference position and angle have been applied manually or using an automatic marking machine. Therefore, the conventional technology has a problem of increasing costs.

[Purpose of the invention]

An object of the present invention is to solve the problems of the prior art, and to accurately and easily store the reference position angle of the workpiece in the calculating section of the measuring machine when replacing the corrected position angle based on the calculation of the measuring machine on the workpiece. To provide a motive rotor for a cage-type rotor 4 which can be used to reduce costs and reduce costs.

[Summary of the invention]

The present invention has a percentage sign in that a reference position angle detector is provided at one location in the circumferential direction of a rotor equipped with a single rotor core and an end ring as a secondary conductor. With this configuration, the above objective can be achieved reliably.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

Figures 1 and 2 show one embodiment of the present invention;
A groove 5 is formed at this location as a detector for the reference position angle.

The groove 5 is formed at the stage of manufacturing the end ring 3 by die casting or the like.

FIG. 5 shows a state in which the rotor is mounted on an unbalance detection device and unbalance detection work is being performed.

The unbalance detection device shown in FIG. 3 includes a vibration detection table 7, a workpiece drive belt 8 that rotates a rotor 6 as a workpiece, and a camera 9 for detecting corrected position and angle as a measuring device. There is.

In this unbalance detection device, the vibration detection table 7
A rotor 6 as a workpiece is mounted on the rotor 6, rotation is given to the rotor 6 via a workpiece drive belt 8, and a detection camera 9 photographs and stores the image.

At this time, the position angle at which balance correction should be performed can be detected accurately and easily using the rotor 6 and the groove 5 as a reference position angle detector.

After detecting the position angle at which the balance should be corrected, the calculated corrected position angle is replaced with the rotor 6 as a workpiece, the balance correction work is performed, and a complete product is produced.

Next, various other embodiments of the present invention will be listed. good.

(2) The detector is manufactured by making one of the plurality of balance correction protrusions 4 provided on the end ring 3 thicker or thinner, longer or shorter during the manufacturing process of the end ring 3. It may have a shape that can be distinguished from the balance correction protrusion.

(3) The detector may also have a small hole or groove formed at one location on the outer periphery or end face of the rotor core 2 located at the end in the axial direction during the manufacturing stage of the rotor core 2. good.

〔Effect of the invention〕

According to the present invention described above, one part of the rotor in the circumferential direction is provided with a rotor core and an end ring as a secondary conductor.
Since a detector for the reference position angle is installed at the location, the corrected position angle calculated by the measuring machine is displayed on the workpiece (rotor).
At the time of lt conversion, there is an effect that the reference position angle of the workpiece can be accurately and easily stored in the calculating section of the measuring machine by using the detector.

Further, according to the present invention, since the detector for the reference position angle can be easily formed at the manufacturing stage of the rotor core and end ring, there is also an effect of reducing costs as shown in FIG.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is an enlarged perspective view of the main parts of the present invention, and Fig. 3 is a perspective view showing an embodiment of the present invention. FIG. 4 is a longitudinal sectional front view of a conventional rotor, and FIG. 5 is a side view of the same. DESCRIPTION OF SYMBOLS 1... Rotor shaft, 2... Rotor core, 3... End ring, 6... Balance correction protrusion, 5... Concave groove as a detector for basic position angle

Claims (1)

[Claims] 1. A cage characterized in that a reference position angle detector is provided at one location in the circumferential direction of a rotor that is equipped with a rotor core and an end ring as a secondary conductor. Rotor of shaped induction motor. 2. The rotor of a cage-type induction motor according to claim 1, wherein the detector of the reference position angle is a groove formed in the end ring. 3. The rotor of a cage-type induction motor according to claim 1, wherein the detector for detecting the reference position angle is a projection provided on the end ring. 4. Claim 1 is characterized in that the reference position angle detector is one of a plurality of balance correction protrusions provided on the end ring formed into an irregular shape. The rotor of a cage-type induction motor. 5. The rotor of a cage-type induction motor according to claim 1, wherein the detector for detecting the reference position angle is a hole formed in a part of the outer periphery of the rotor core. 6. A rotor for a squirrel cage induction motor according to claim 1, wherein the reference position angle detector is formed integrally with the rotor core and the end ring at a manufacturing stage.