JPS6035943A - Balance regulating method of armature - Google Patents

Abstract

PURPOSE:To facilitate stationary balance and rotary balance of an armature by cutting the outer periphery of an armature core to roughly regulate the balance, then fixing small piece such as putty to cut portion or armature coil to precisely regulate the balance. CONSTITUTION:Recess slots 7a, 7b and 8 are formed in suitable number on the outer periphery of an armature core 2 engated with an armature rotational shaft 3. Thus, stationary balance is regulated. Then, small amount of epoxy putty is bonded to an armature coil 5 or the recess slots to finely regulate the dynamic balance for final regulation. Thus, precise balancing work can be readily performed including excessive cutting together with bonding in addition to regulation by only cutting.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for adjusting the balance of a rotor (armature).

A rotor having windings of approximately
As stated in Publication No. 9601, unbalanced rotation is likely to occur due to eccentricity of the rotating shaft or uneven distribution of the windings, and in order to eliminate this, the outer periphery of the teeth of the rotor's iron core (amateur core) is The method used was to adjust the balance by making appropriate cuts with a drill or the like.

However, with this conventionally used adjustment method, if the initial unbalance (static balance and rotational balance) of the armature is large, it cannot be corrected to the required unbalance only by cutting (perforation or milling cutter machining). ,
In addition to being defective, if the amount of unbalance is unevenly distributed at one end of the rotating shaft (1 to 4 in the case of the armature of a DC motor used in a starter motor for a normal gasoline passenger car)
With the core cutting method using a drill or cutter,
There were drawbacks such as the inability to correct the unbalance of 0.1 grams due to amateur size constraints.

In addition, with only the method of adding putty etc. to the end (end part) of the coil (armature coil), when the amount of unbalance is large, the specific gravity of the putty becomes small, so a large amount of additional material (volume) is required. There was a concern that the putty would peel off due to the centrifugal force caused by the rotation of the Hit machine, which did not have sufficient over-rotation strength.

This invention was made in order to eliminate the drawbacks of the conventional methods as described above, and provides an adjustment method that has the following excellent effects by using two methods: cutting and putty addition. is aimed at something.

An embodiment of the present invention will be described below with reference to FIGS. Figure 5 is a cross-sectional view of the armature (1) processed through the steps shown in Figures 2 and 8.
2) is the armature iron core (amateur core), (8) is the armature rotating shaft, (4) is the slot, in which the armature coil (amateur coil) (I5) is wound, and the space after winding is filled with epoxy resin. Filled with insulation material (6).

(7&) and (7b) are respectively cut grooves,
Armature core (2) by milling cutter (not shown)
The external tooth surface of is removed and the static balance of the armature (1) is adjusted. Next, in FIG. 8, (toD is a balanced armature, and a concave groove (8) is cut by a milling cutter (not shown). Next, as shown in FIG. [Illustrated (a)] Armature (101)
A small amount of epoxy putty (not shown) is applied to the armature coil (5) by additional putty work [shown (b)], and the final adjustment of the armature (tol) and fine adjustment of the amount of imbalance are performed. . In addition, if the armature unbalance amount is, for example, 4
In the case of grams, the adjustment of 8 to 5y is performed by cutting (a) K, and the remaining 1 gram cannot be adjusted by using epoxy putty.

In this way, if it is impossible to adjust the unbalance amount by cutting only (if cutting is not possible or if there are too many cutting vortices), it will be possible to correct it by fixing the putty. In the above embodiment, a case where the present invention is applied to an armature (rotor) of a blood flow motor has been described, but the present invention can also be applied to other rotating electric machines as long as the rotor has a similar configuration.

As described above, according to the present invention, in the balancing work of an armature, large corrections are made using a cutting method using a drill or a cutter, and then a method of fixing small pieces with putty or the like is used in combination to reduce the amount of unbalance. Since the correction is made in a precise manner, the correction work is easy and precise correction is possible, which is an extremely excellent effect.

[Brief explanation of drawings]

Each of the drawings shows an embodiment of the present invention.
tm is a cross-sectional view of the armature in an intermediate step according to the method of the present invention, which is taken along the line II in FIG. 2. Fig. 2 is a half cross-sectional view of the armature in an intermediate step, Fig. 8 is a half cross-sectional view of the armature with the equipment shown in Fig. 2 added, and Fig. 4 is for explaining the steps of the method of this invention. FIG. In the figure, (1) and (101) are armatures, (2) are armature cores, (8) are 11ILga child rotating shafts, (4) Haslots, (5) LJ armature: 1il, (7a) ( 7b) and (8) are concave grooves. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Masuo Oiwa

Claims (2)

[Claims] (1) In the method of adjusting the static balance and rotational balance by adjusting the weight of the armature, the outer periphery of the armature core is cut to perform rough adjustment, and then a small piece of putty or the like is fixed to perform precise adjustment. An amateur balance adjustment method characterized by: (2) The method for adjusting the balance of an armature according to claim 1, wherein the outer periphery is cut with a drill or a cutter, and the small pieces to be fixed are made with epoxy putty.