JPS6325871Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a stator for a small motor.

The stator of a small motor such as a commutator motor is conventionally made by attaching a slot insulating plate to the slot inner circumferential surface of a core with salient pole teeth formed on the inner circumferential surface. The wire was wound using an automatic winding machine using a jig. However, as is clear from the partial sectional views of the stator shown in FIGS. 1A and 1B, the slot insulating plates b are offset relative to the core a, and the ends d and d of the slot insulating plates b protrude from the core end surfaces c and c. The lengths may be different, or the ends d, d of the slot insulating plate b may be curved due to the winding force of the stator coil e. This has caused a problem in that a sufficient insulation distance between the stator coil e and the core a cannot be ensured, and sometimes the slot insulation plate is torn.

The present invention aims to eliminate such drawbacks of conventional stators and provide a stator with stable insulation performance between the stator coil and the core.One embodiment of the invention will be described below with reference to the drawings.

Figure 2 is a plan view of the stator in the manufacturing process, with the salient pole teeth on the left side showing the state before the stator coil is wound, and the salient pole teeth on the right side showing the state after the stator coil is wound. shown respectively. FIG. 3 is a sectional view taken from FIG. 2, and FIG. 4 is a right side view of the stator. In these drawings, a core 1 is constructed by laminating a plurality of iron core plates 2, and the core 1 has a pair of salient pole teeth 3, 3 on the inner circumferential surface, and each salient pole on the outer circumferential surface. Engagement grooves 4, 4 are provided on the back side of the teeth. A slot insulating plate 5 is attached to the inner peripheral surface of the slot of the core 1. 6 and 6' are end faces made of resin, each having approximately the same shape as the end face 7 of the core 1;
It has an end plate part 8 that covers the salient pole tooth part 3, and is located at the end face part of each salient pole tooth part 3. Each end plate portion 8 has an axial protrusion 9 provided along the inner peripheral end surface of the salient pole tooth portion 3 in a direction protruding from the salient pole tooth portion 3, and a fitting protrusion that fits into the engagement groove 4. 10, and a protrusion 11 for positioning the slot insulating plate 5 by abutting against the axial end 5' of the slot insulating plate 5 protruding from the core end face 7. The end face stand 6 located on one end face of the core 1 is
Furthermore, it has relay terminal parts 12, 12.

The end stands 6, 6' have a pair of fitting protrusions 10, 1, respectively.
0 is press-fitted into the engagement groove 4 to be attached to the core end surface 7. In this case, the slot insulating plate 5 installed in advance on the inner peripheral surface of the slot of the core 1 is
When the axial end 5' protruding from the core end face 7 comes into contact with each protrusion 11 of the end faces 6, 6',
Positioned. In this state, a part of the shroud jig is inserted into the gap 13 between the core end surface 7 on the salient pole tooth part and the end plate part 8 to position the shroud jig, and the stator coil 14 is positioned by an automatic winding machine. is wound around each salient pole tooth portion 3. In this case, the stator coil 14 is tightly wound and held in a constant shape due to the presence of the respective axial projections 9 of the end faces 6, 6'.
Further, a winding start end 14' and a winding end 14'' of the stator coil 14 are connected to the relay terminal section 12, respectively.

As described above, according to the present invention, the stator coil can be held in a fixed shape by the end pedestal attached to the end face of the core, and the protrusion provided on the end pedestal can be attached to the shaft of the slotted insulating plate protruding from the end face of the core. Since the slot insulating plate is positioned by coming into contact with the directional end, the slot insulating plate is less likely to shift or be damaged, and the insulation distance between the stator coil and the core can be kept approximately constant. A stator with stable performance can be provided.

[Brief explanation of the drawing]

Figures 1A and 1B are partial cross-sectional views of a conventional stator;
FIG. 2 is a plan view of the stator in the manufacturing process showing one embodiment of the stator according to the present invention, FIG. 3 is a cross-sectional view along the line taken from FIG. 2, and FIG. 4 is a right side view of the stator. 3, 3...Salient pole tooth portion, 1...Core, 5...Slot insulating plate, 6...End face plate, 8...End plate portion, 9...
...Axial protrusion, 4...Engaging part, 10...Fitting part, 11...Protrusion, 12...Relay terminal part.

Claims (1)

[Claims for Utility Model Registration] (1) A core with salient pole teeth formed on the inner circumferential surface, a slot insulating plate located on the inner circumferential surface of the slot of the core, and a resin attached to the end surface of the core. The end plate has an end plate portion that covers the end surface of the core, and the end plate portion projects from the salient pole tooth portion along the inner peripheral end surface of the salient pole tooth portion. an axial protrusion provided on the core; a fitting portion that fits into the engagement portion provided on the core; A small motor stator comprising a protrusion for positioning the motor. (2) A stator for a small motor according to claim 1, wherein the end face plate further includes a relay terminal portion.