JPH04271256A - Method of initially processing the quantity of unbalance of motor rotor - Google Patents

Abstract

PURPOSE:To correct the unbalance of a rotor by partially changing the thickness of insulating end parts or inserting a blade with specified thickness between it and the core thereby adding or reducing the mass of winding. CONSTITUTION:For the insulating end parts 4 of a core 3, one or a plurality of arms 4''a are made thicker than the others out of many arms 4'a extending radially, and the winding 1a, which is assembled and wound to position on the side being shifted to the center axis X-X of a shaft 2 or on the diameter-cut side, is lengthened as compared with the winding of the other arm 'a. Or, the additional plate for unbalance compensation may be set in piles on the arm and core. By increasing or decreasing the length of the winding, the mass of the winding is increased or decreased to reduce the quantity of unbalance in rotation in advance, so the quantity of additional balance weight of the resin becomes slight in the final balancing process, and the processes of cutting the core, the boring, etc., are lens, and the manhours in the correction of balance is sharply reduced and the cost can be reduced.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention generally relates to motors.
More specifically, the present invention relates to an initial treatment method for an unbalanced amount of a motor rotor.

0002

2. Description of the Related Art FIG. 7 shows a front view of a conventional core-wound motor rotor, and FIGS. As shown in A), the motor is eccentrically processed for use as an eccentric motor, or as shown in Figure 8 (B), it is cut in diameter (D-cut) for connection to another rotating shaft. In addition to the unbalanced state of the winding 1, the unbalanced rotation of the rotor occurs due to the unbalanced mass. Conventionally, as a method for removing this unbalance, a balance weight 5 is placed outside the insulating end piece 4 near the outer periphery of the winding 1, and in an eccentric direction with respect to the central axis XX of the shaft 2, or Add it to each direction of the diameter cut (plus balance correction), or
Alternatively, this was done by cutting off the outer periphery of the core 3 in the eccentric direction or in the opposite direction to the diametrical cut.

0003

[Problems to be Solved by the Invention] The amount of rotational unbalance obtained by the above method is relatively large, and either positive balance correction or negative balance correction usually requires two to three trial and error processes. There was a desire to improve productivity by reducing processing man-hours.

0004

[Means for Solving the Problems] In the present invention, the insulating end parts of the core are made partially thick or thin in advance in the early stage of the assembly process, or the insulating ends are placed between the insulating end parts and the core. The above problem is solved by a method of increasing or reducing the winding mass by inserting a plate that matches the shape of the part and has a predetermined thickness to have the same effect as the partial thickening method described above. did.

[0005]

[Effect] Taking into consideration the eccentricity or diameter cut of the shaft, which is known in advance, when a coil is wound around the partially thickened part of the insulated end part of the core, the length of the wound coil becomes longer and the mass increases. This works in the same way as adding a balance weight, and on the other hand, when it is made thinner, it works in the same way as minus balance, which involves cutting or drilling the core.

[0006]

Embodiment A perspective view of a first embodiment of the initial treatment for the unbalance amount of a motor rotor according to the present invention is shown in FIG. 1, and a schematic front view is shown in FIG. ) or the diameter cut shown in (B) of the same figure. As shown in FIG. 5, the insulating end piece 4a of the core has a large number of radially extending arms 4'a, one or more arms 4''a (two in FIG. 1) have a thickness h2 as shown in FIG. 6
As shown in (A), (B) and (C) of FIG.
D) is made thicker than the thickness h1 of the other normal arm 4'a, and such a thick arm 4''a is
As shown in FIG. 1, the shaft 2 is assembled so as to be located on the eccentric side with respect to the central axis XX, or on the diametrically cut side, and the winding 1a wound on that part is connected to the other arm 4'.
The length is longer than the winding wound around a.

As a second embodiment, instead of treating the integrally molded insulating end part 4a (see FIGS. 1 and 2) itself as in the first embodiment, a separate unbalanced part shown in FIG. A compensating plate 4b can also be inserted between the arm of the insulating end piece 4 and the outer end of the core to achieve a similar effect to the thickened arm 4''a shown in FIG. 1 or 5.

FIG. 4 shows a third embodiment in which some of the arms in a plurality of ordinary insulating end parts 4c are replaced with thinner compensating insulating end parts 4d. In this case, thin arms is located in the eccentric direction or in the opposite direction of the diameter cut with respect to the central axis The loss will be compensated.

[0009]

Effects of the Invention As described above, as an initial procedure for assembly, the axial thickness of some arms of the insulating end part can be increased, or the thickness of some arms of the insulating end part can be increased or Separate plates can be stacked on some arms or
By preparing and using compensating members that are relatively easy to process and install, such as reducing the axial thickness of the coil, and increasing or decreasing the length of the winding in that area, the mass of the winding can be increased or decreased. let me,
Since the amount of rotational unbalance can be reduced in advance, the amount of resin balance weight added in the final balance correction process is small, the processing such as cutting the core or drilling is small, and the number of man-hours for balance correction is large. The width is reduced and the cost is reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a motor rotor in which an unbalanced amount is corrected at an early stage of assembly by thickening a part of an insulating end part as a first embodiment of the present invention.

FIG. 2 is a schematic front view of the motor rotor shown in perspective view in FIG. 1;

FIG. 3 is a schematic front view of a second embodiment using a separate plate to thicken a portion of the insulating end piece;

FIG. 4 is a schematic front view showing a third embodiment in which a portion of the insulating end part is thinned.

FIG. 5 is an enlarged front view of an insulating end piece according to the invention.

6A, 6B, and 6C are cross-sections A-A and B-B in FIG. 5 of the insulated end piece with increased thickness, respectively;
(D) Figure 5 of a normal insulating end part in cross section and C arrow view.
This is a view from arrow D.

FIG. 7 is a front view of a conventional motor rotor adjusted with a balance weight.

FIG. 8 (A) and (B) are the VI of FIG. 7, respectively.
FIG. 2 is an explanatory diagram showing an exaggerated eccentricity or diameter cut existing in the shaft in a view taken along arrow II.

[Explanation of symbols]

1, 1a, 1b: Winding wire 2: Shaft 3: Core 4, 4a, 4c, 4d: Insulated end parts 4b: Unbalance compensation plate 4’a, 4”a: Arm 5: Balance weight

Claims (3)

[Claims] Claim 1: The amount of unbalance of the rotor caused by the condition of the winding of a motor rotor having a winding wound around the core, the imbalance of mass with respect to the rotating shaft due to eccentricity and/or diameter cutting of the rotating shaft. In the method of adding a balance weight to the surface of the winding in order to eliminate 1. A method for initial treatment of an unbalanced amount of a motor rotor, the method comprising increasing or decreasing the length of a line to reduce an initial value of an unbalanced amount of mass. 2. The method for initial treatment of an unbalance amount according to claim 1, wherein the means for increasing or decreasing the length of the winding wire includes a radius Either increase the axial thickness of the arm of the insulating end piece on the side where mass loss occurs in the direction, or add a plate of thickness corresponding to this thickness increase. A method for initial treatment of an unbalanced amount of a motor rotor, characterized by adhering it to a motor rotor. 3. The method for initial treatment of an unbalance amount according to claim 1, wherein the means for increasing or decreasing the length of the winding wire includes a radius 1. A method for initial treatment of an unbalance in a motor rotor, the method comprising reducing the axial thickness of an arm of an insulated end part on the side where an increase in mass occurs in the direction.