JPH02133047A - Resin-molded motor - Google Patents

Abstract

PURPOSE:To conduct a design satisfying the requirements relating to dielectric strength and a lightning surge by forming a groove to the section of a molding material made of a resin in a section with which a bearing housing is brought into contact. CONSTITUTION:Bearings 13 for holding a shaft 12, to which a rotor 11 is press- fitted, are held by bearing housings 14, and press-fitted to the central section of a molding material 10 made of a resin. A plurality of grooves 15 are shaped to sections where the bearing housings 14 are brought into contact with the molding material 10 made of the resin. Consequently, a coil 9 is stopped by the bottoms of the grooves 15 by a mold forming the grooves 15 on resin molding working, and fixed to the bearing housings 14 at the space of the depth of the grooves 15. Accordingly, a resin-molded motor can be designed so as to satisfy the requirements relating to dielectric strength and a lightning surge.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a resin molded motor in which a stator is covered with a resin molded material.

2. Description of the Related Art Conventionally, this type of resin molded motor has generally had a configuration as shown in FIG. The configuration will be explained below based on FIG. 3. That is, 1 is a stator core that becomes a part of the stator, 2 is a stator core, 3 is a resin molding material that covers the stator coils, etc., 4 is a bearing housing that holds the bearing 6, 6 is a rotor, and 7 is a shaft. be. In the above configuration, when the stator coil 2 is energized, the rotor 6 having a predetermined gap with the stator core 1 rotates, and the shaft 7 is rotated.

Problems to be Solved by the Invention However, in such a structure, when the resin molding material 3 is removed, the stator coil 2 is pushed up to the press-fitted part of the bearing nozzle 4 due to the flow of unassimilated resin. If the stator coil L'2 is pushed out, the dielectric strength and lightning surge voltage between the live part and the bearing housing 4 do not meet the standards, or the stator coil L'2 is pushed out to the bearing housing contact surface.
There were problems such as damaging the stator coil 2 when press-fitting the bearing housing.

In view of the above problems, an object of the present invention is to maintain a constant distance from the bearing housing even when the stator coil is pushed by the flow of the resin molding material.

In order to solve the problem and achieve the above object, the present invention provides a plurality of grooves in the resin molding material in the portion into which the bearing housing is press-fitted.

Operation With the above configuration, when resin molding is performed, the coil is stopped at the bottom of the groove by the mold forming the groove, and is fixed to the bearing housing with an interval equal to the depth of the groove. Therefore, a design can be made that sufficiently satisfies dielectric strength and lightning surge.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2. In the figure, the stator is constructed by winding stake coils/I/9 around the stator core 8, which is the main part of the stator, and the entire stator is molded with a resin molding material 1o.
It is covered with The bearing 13 for holding the shaft 12 with the rotor 11 compressed is still attached to the bearing 14.
The resin mold material 10 is held at the central portion thereof and is compressed.

The bearing housing 14 is made of resin mold material 1o.
A plurality of 416 are provided in the portion that contacts the.

The operation of the resin molded motor configured as described above will be explained. As shown in FIG. 2, when a stator coil ZV9 or the like is molded with a molding material 10 made of wood M''iI, the stator coil 9 is likely to be pushed out toward the inner circumference by the flow of the resin molding material 1o. By forming a plurality of convex portions around the part of the mold that contacts the bearing housing 14 during molding, the flow of the stator coil/L/9 is stopped at the convex portions.
It is not pushed out to the contact surface with the bearing nozzle 14.

That is, in the state of a completed stator product, the flow of the stator coil (V9) stops at the bottom of the groove 16.

Effects of the Invention As is clear from the above embodiments, according to the present invention, by providing a groove in the part of the resin molding material that contacts the bearing housing, the stator coil stops at the bottom of the groove and is not connected to the bearing housing. Since the insulation distance of the stator coil can be ensured, a design that satisfies the dielectric strength and lightning surge resistance can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a resin molded motor according to an embodiment of the present invention, FIG. 2 is a partially cutaway front view of the same, and the third section is a partially cutaway front view of a conventional resin molded motor. 8...Stator core, 9...Stator coil, 1o...Resin mold material, 11...
...Rotor, 12...Shaft, 13...
・Bearing, 14... Bearing no. 1 housing, 15...
····groove. Name of agent: Patent attorney Shigetaka Awano and one other person Figure 8 ・ 10 -1- U --- I2-- l3 --- Katsuko-Kin I Utsumugido Housing Exit

Claims (1)

[Claims] A resin molded motor in which the entire stator, including the stator coil and its terminals, is covered with a resin molding material, and a plurality of grooves are provided in the molding material in the part where the bearing housing that holds the bearing part is press-fitted.