JPH0723005Y2 - Electric motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an electric motor.

<Prior Art> FIG. 2 shows one form of a stator of an electric motor during manufacture. The manufacturing process up to FIG. 2 will be described. First, the outer layer coils 4, 4 are inserted into the iron core 1 through the slot insulation 2,
Terminal wire drawn from the coil (hereinafter referred to as lead wire)
The tubular lead wire insulation 7a, 7b is inserted through 6a, 6b. Next, insert the inner layer coils 5 and 5 and draw out the leads 6c and 6d of the inner layer coils.
Similarly to the above, the lead wire insulations 7c and 7d are inserted.

The leader wire insulation is a tube made of polyester or fluorocarbon resin and having a thickness of about 50 to 200 μm. The purpose is to prevent the leader wire from being scratched in a later step and to electrically insulate the leader wire that is easily contacted with the different phase coil on the wiring. It is installed.

The lead wire of the electric motor configured as shown in FIG. 2 is connected to each other in a later step, or is connected to a lead wire, or is directly attached with a terminal to form a lead portion of the electric motor. Is.

In the electric motor configured as described above, if an error occurs in the connection of the lead wire, the performance of the electric motor becomes completely different, and the electric motor cannot be used for its intended purpose. . Therefore, misleading of the lead wire must be prevented, but can often occur in the actual manufacture of the electric motor. In particular, if the lead wires, lead wires, and connection points are concentrated in almost the same location on the motor stator, or if the number of poles and the number of phases of the motor are large, the risk of incorrect connection will definitely increase. .

As a preventive measure against this incorrect connection, it is effective to use a color-coded leader line insulation to color-code each leader line, and this method can facilitate the identification of each leader line by a wiring operator. it can. So, in the past, you could directly cover the leader line with a braided sleeve woven polyester,
Alternatively, each lead wire is identified by covering it on a tube constituting the lead wire insulation and color-coding this braid. Further, as another means, ink is attached to the tube itself that constitutes the lead wire insulation, and each lead wire is identified by color-coding this ink.

<Problems to be solved by the invention> However, since the above polyester-based braided sleeve has many gaps in itself, when it is used by directly covering the leader line, it is necessary to prevent the leader line from being scratched and electrically insulating. In order to achieve this, it is necessary to double- or triple-coat, which results in a great increase in cost. Generally, a polyester braided sleeve is more expensive than a tube made of polyester or the like.Therefore, even if the braided sleeve is used by covering it with the tube that constitutes the lead wire insulation, the material cost and the production cost will be reduced. In this case, the lead wire insulation becomes expensive, which increases the cost of the electric motor. Further, in the case of a tube to which ink is attached, since polyester or fluororesin is a material to which ink does not easily attach, it is difficult to identify colors due to disappearance of ink once attached or uneven hue. This is a delay in the wiring work, and moreover, since it is necessary to surely adhere the ink and man-hours are required for the ink adhesion work, the cost of the electric motor is also increased.

<Means for Solving the Problem> The electric motor of the present invention uses, as the lead wire insulation, a thin tape wrapped to form a tube. The lead wire insulation is formed by inserting colored threads into the wrap portion of the thin tape and welding the wrap portions so as to sandwich the colored threads. This leader line insulation is used by inserting it into a part or all of the plurality of leader lines of the electric motor. When applied to a plurality of leader lines in one electric motor, the leader line insulation Each leader line is identified by color-coding the colored threads to be sandwiched.

<Operation> The lead wire insulation inserted into each lead wire of the electric motor is configured such that the hues of the colored yarns to be sandwiched are clearly different from each other. It is easy to identify each leader line by.

<Embodiment> FIG. 1 shows a lead wire insulation 7 used in an electric motor of the present invention, which is formed by wrapping a transparent polyester film tape 8 having a thickness of about 50 to 100 .mu.m into a tube shape. In the wrap portion 10 of the lead wire insulation 7, a polyester 9 having a predetermined hue is inserted between the inner and outer tapes 8 at the same time as the wrap, while the wrap portion 10 includes the colored yarn 9
Is wrapped around the inside of the tube and sandwiched, and ultrasonically welded along the colored yarn 9 to form a welded portion 11. Although not shown in the drawing, since the tape 8 is actually transparent, the colored yarn 9 on the back side of the leader line insulation 7 is also seen through, and as a result, the colored yarn 9 spirals along the outer circumference of the leader line insulation 7. Draw a pattern and the hue is clear from any angle.

The leader wire insulation 7 configured as described above is inserted into the leader wires 6a, 6b, 6c, 6d of the motor stator as shown in FIG. 2 and contributes to the identification of the leader machine. In this case, it may be used by inserting it into a part of a plurality of leader lines, for example, together with a leader wire insulation of a different structure such as a conventional product, or by inserting it into all of the plurality of leader lines. is there.
Of course, when a plurality of lead wire insulations 7 are used for one electric motor, color yarns 9 having different hues are used to color-code each other.

Further, as another form of the lead wire insulation 7 shown in FIG. 1, a transparent polyester film tape 8 is simply wrapped and formed into a tube shape without inserting the colored yarn 9 at all, and this wrap portion 10 is formed. The leader wire insulation made by ultrasonic welding also
It can be used as one of the identification elements of the hue of colorless. In this case, another feature to note is:
The welded portion draws a spiral pattern along the outer circumference of the leader line insulation, and this pattern has a sufficient visual difference when compared with a tube made of conventional polyester or the like so that the difference can be identified. That is the point. Further, the polyester film or tube is generally one in which the degree of haze can be easily adjusted without increasing the cost by adjusting an additive to the raw material. For example, the transparent film is replaced with a milky white having a large degree of haze. By using this film, it is possible to form leader wire insulation having different ground colors. Therefore, by combining a spiral-shaped tube by welding and a conventional tube without a pattern, and further by combining the two types of tubes having different ground colors, the lead wire insulations are made different and these are inserted. Identification of the leader line is achieved.

<Effect of the Invention> According to the present invention, a plurality of leader wire insulations can be clearly distinguished by the difference in hue of the colored yarns, and from these differences, the difference of each leader wire can be easily and surely identified by the wiring operator. ,
It is possible to reduce the risk of misconnection of the electric motor and improve the quality of the electric motor. In addition, there is no need to use expensive braided sleeves, and there is no unevenness or disappearance of the hue or pattern that is a guide for identification.
It does not delay the wiring work, improves the work efficiency, and greatly contributes to the cost reduction of the electric motor.

In general, tapes such as polyester film are much cheaper than tubes made of polyester or the like, which are manufactured by extrusion processing with a large-scale device, and therefore processing for forming this tape into a tube shape by ultrasonic welding. Even if the cost is added, the leader wire insulation wrapped with the thin tape used for the electric motor of the present invention and the leader wire insulation in which the colored threads are sandwiched between the leader wire insulation can be manufactured at a lower cost than the conventional product. From the point of view, it can contribute to the cost reduction of the electric motor.

Further, another advantage of the present invention is that the welded portion of the lead wire insulation is hardened so that it becomes stiff when formed as a tube. This is because the lead wire insulation is weak in the past, so the insertion opening to the lead wire may be flat, or the lead wire insulation before insertion may be bent in the middle, leading to the work of inserting the lead wire. On the other hand, according to the present invention, the above-mentioned conventional drawbacks are improved, and workability in inserting the lead wire insulation into the lead wire is improved, and the number of steps can be reduced. Is.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention by disassembling a part of a lead wire insulation used in an electric motor, and FIG. 2 is a perspective view showing an embodiment in the middle of manufacturing a stator of the electric motor. is there. 3 ... wedge, 6a, 6b, 6c, 6d ... terminal electric wire (leader wire), 7, 7a,
7b, 7c, 7d ... Lead wire insulation, 8 ... Tape, 9 ... Colored yarn, 10 ... Wrap portion, 11 ... Welded portion.

Claims (1)

[Scope of utility model registration request] 1. A leader wire insulation formed by wrapping a thin tape, inserting a colored thread in the wrap portion, and welding the lap portion so as to sandwich the colored thread to form a tube-shaped lead wire insulation. An electric motor, which is configured by inserting a part or all of a plurality of terminal electric wires drawn out from the electric wire.