JPH09117088A - Stator for motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a connector from falling off the stator in the process preceding the integral molding process of the stator and to reduce the labor required for repairing work. SOLUTION: A connector is provided with a fixing protrusion 72 having a stopper protrusion at the forward end thereof. A groove 11 is made in the outer circumference of stator core in the axial direction thereof and a stopper recess 72 for fixing the connector is made at a position corresponding to a stopper protrusion 73 at the forward end of connector fixing part. Subsequently, the connector is inserted into the stator groove 11 and fixed in place before integrally molding the stator core 1, the coil and the connector of plastic.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator of an electric motor having a terminal housing portion and a power source connecting terminal and having a connector molded of plastic mounted therein.

[0002]

2. Description of the Related Art A stator having a power supply connection terminal and a connector molded of plastic will be described with reference to FIGS.

A connector 8 which is previously formed in a box shape from plastic for accommodating the power supply connection terminal 6 is provided with a connector fixing projection 82 having a trapezoidal cross section and a tapered tip 83. The coil tip 5 of the coil 2 which is inserted and fixed in the trapezoidal groove portion 11 on the outer periphery of the stator core and which is wound around the stator core 1 through the slot insulator 3 is soldered or welded to the terminal 6. The stator core, coil, and connector were integrally molded from plastic.

[0004]

When the connector is fixed by the conventional method, (1) the positioning of the connector in the circumferential direction and the radial direction with respect to the stator is carried out by the groove portion on the outer circumference of the stator and the connector fixing projection inserted therein. The parts can be fixed by making them trapezoidal, but the positioning in the axial direction is not reliably performed, and defects are likely to occur due to the connector falling off from the stator in the process before the integral molding of the stator. (2) There is a problem that it is necessary to manage the removal correction of the connector stator.

The present invention solves the above-mentioned conventional problems, and aims to improve the quality by preventing the occurrence of defects during integral molding of the stator by ensuring the positioning of the connector with respect to the stator.

[0006]

In order to achieve the above object, the present invention provides a connector molded of plastic,
A box-shaped terminal accommodating part for accommodating power connection terminals and a connector fixing protrusion with a trapezoidal cross section and a stopper protrusion at the tip for fixing the connector, and a trapezoidal groove in the axial direction on the outer peripheral surface of the stator core. A stopper recess for fixing the connector is provided on this part, and the fixing projection of the connector is inserted into this part.
The coil and connector are integrally molded from plastic.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a stator core 1, a coil 2, an insulator 3 of a status lot portion, a terminal 6, a connector 7 in which a fixing projection is molded of plastic, a coil tip 5 for connecting to the terminal 6, a coil 2 shows a stator made of plastic 4 integrally molded to insulate 2 and form an outer frame.

A coil 2 having a winding is provided with an axial groove portion on an outer peripheral portion of a stator core 1 which is insulated by a status lot insulating material 3, and a fixing projection portion of a connector 7 formed of plastic. The stator core 1, the coil 2 and the connector 7 are integrally formed of plastic in a state where the protrusion is inserted into the groove of the stator core and the coil tip 5 is connected to the terminal 6 housed in the connector by soldering or the like.

FIG. 2 is a diagram when the connector 7 is inserted into the stator core 1. In the connector 7 having the terminals 6, the terminal accommodating portion 71 on the power supply connection side and the connector fixing protrusion 72 are formed of plastic, and the connector fixing protrusion 7 is formed.
2 has a trapezoidal cross section, and the length, width, and height are arbitrary.

The stator core 1 has a trapezoidal outer periphery, and a stopper recess 12 for the stator outer periphery is provided in a part of the groove 11 at a position opposed to the groove 11 and the stopper protrusion 73 of the fixing protrusion of the connector 7. The trapezoidal groove 11 is fitted with a connector fixing projection 72, and the stator core outer peripheral stopper recess 12 is fitted with a connector fixing projection tip projection, whereby the stator core 1 and the connector 7 are fixed. The trapezoidal groove portion 11 and the stopper recessed portion 12 provided on the outer periphery of the stator core are formed by cutting after stacking the stator core sheets or a laminated product of the stator core sheets punched out in advance.

FIG. 3 is an enlarged view of the connector according to the present invention, in which the connector 7 is formed of a tip housing portion 71 and a connector fixing protrusion 72, and the connector fixing protrusion 72 has a trapezoidal cross section. A tip stopper convex portion 73 is provided. These shapes are of such dimensions that they can fit into the groove and stopper recess on the outer circumference of the stator core. Also,
If necessary, the joining portion 74 with the stator core is provided with a step having a different height rather than a flat shape in order to improve the fitting property with the stator core groove, and the height and the number of steps are arbitrary.

According to the present invention, with the above-described structure, by strengthening the fixing force of the connector to the stator core in the axial direction, it is possible to prevent the connector from dropping off from the stator before the integral molding of the stator, and to improve the quality. This has the effect of improving quality by reducing the management process for dropout correction.

[0014]

As described above, according to the present invention, a trapezoidal groove portion and a stopper concave portion are provided on the outer circumference of the stator core, and the trapezoidal fixing protrusion portion of the connector molded with plastic is inserted in the groove portion. Thus, it is possible to reliably position the connector in the radial direction and the circumferential direction with respect to the stator, and improve the quality by preventing the connector from falling off the stator in the pre-process of integrally molding the stator core, the coil, and the connector with plastic. This has the effect of reducing the man-hours required for management when the connector is removed.

[Brief description of the drawings]

FIG. 1 is a sectional view of a completed stator product according to an embodiment of the present invention.

FIG. 2 is an insertion diagram of a connector into a stator according to an embodiment of the present invention.

FIG. 3 is an enlarged view of a connector according to an embodiment of the present invention.

FIG. 4 is a sectional view of a conventional finished stator product.

FIG. 5 is an insertion diagram of a conventional connector into a stator.

FIG. 6 is an enlarged view of a conventional connector.

[Explanation of symbols]

 1 Stator Core 2 Coil 3 Status Lot Insulator 4 Plastic 5 Coil Tip 6 Terminal 7,8 Connector 11 Groove 12 Recess 71,81 Terminal Storage 72,82 Connector Fixing Projection 73 Stopper Projection 74,84 Joining 83 Protrusion Part tip

Claims (1)

[Claims] 1. A stator-shaped groove portion formed by forming a trapezoidal groove portion in the axial direction on the outer periphery of stacked stator cores and a recessed portion in the trapezoidal groove portion, and a connector fixing projection formed simultaneously with a terminal accommodating portion by plastic. A stator of an electric motor in which a convex portion formed on the tip of a connector fixing protrusion is fitted into the stator core trapezoidal groove concave portion to fix the connector, and the stator core coil connector is integrally molded with plastic.