JPS59106864A - Lead wiring drawing method for molded motor - Google Patents

Abstract

PURPOSE:To prevent a molding material from leaking externally of a molding die by coupling one end side of core wirings exposed at both ends of a sheath of a cabtyre cable to a coil end, and hardening the outer peripheral surface of the sheath with the molding material. CONSTITUTION:One end side of core wirings 16b exposed at both ends of a sheath 16a of a cabtyre cable 16 having the prescribed heat resistance is coupled to a coil end 3a. A stator 1 and the sheath 16a are enclosed in the prescribed mold, the outer peripheral surface of the sheath 16a is interposed between the opposite peripheral edges of the prescribed mold, and the molds are coupled. Then, the molding material is injected into the mold, and after the material is hardened, the molds are disassembled. The other ends 16c of the 3 core wirings 16b coupled to the coil end 3a at one end side are externally projected from the outer peripheral surface of the frame 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in a lead wire drawing method for a mold mold in which a stator is molded with a molding material such as resin.

[Prior art]

The structure and lead wire drawing method of a conventional electric motor of the type B will be explained with reference to FIGS. 1 and 2. In the figure, 11 is a stator consisting of a stator core 2 and a stator winding 3 wound around the stator core 2, and 4 is a predetermined location of a coil end 3a of the stator winding 3 (this end is Three lead wires are axis-aligned, 5 is a cylindrical retaining member 31 having a predetermined heat resistance fitted to the outer peripheral surface of the three lead wires 4, and 6 is an inner member of the retaining member 5. Filled around the periphery, 3 lead wires 4
A filling member 7 is made of resin and fills the gaps between the three lead wires 4 and the inner circumferential surface of the protection member 5, respectively, and 7 is a filling member that is used to protect the entire circumferential surface of the stator 1 and the three lead wires 4. For example, if one end of the member 5 is molded (molded from fat,
3 empty frame body, 7al, through hole formed in the center of the anti-load side of the frame body 7, 7b a large diameter part formed in the anti-load side end of the frame body 7, 7c 7d is a large diameter fitting portion formed at the load side end of the frame 7, and 7e is a load side end of the frame 7. 8 is a co-bearing on the opposite load side fitted into the through hole 7a, and 9 is a water sealing member formed of an O-ring fitted into the large diameter portion 7b. , 10, a male threaded part carved on one peripheral surface of one end is screwed into the female threaded part 70, and a flange formed on the other end] The inner end surface of Oa presses against the water seal member 9 to form a female thread. The thread 17 part 7c, the large diameter part 7b/e, the embolus held watertight, ]1 are connected to the load side end of the frame 7, and the large diameter fitting part 11a loosely fits into the large diameter fitting part 7d. , a load-side bracket 1 in which the medium-diameter fitting portion 11b is fitted into the medium-diameter fitting portion 7e.
Then, insert the load side bearing 1 into the through hole Jlc formed in the center.
2 is fitted. 13 is a rotor core that pairs with the stator core 2; ] 4 is a rotor shaft fitted to the inner peripheral surface of the rotor core 13; one end is connected to the coaxial bearing 8 on the opposite load side; The sides are rotatably supported in load side bearings 12. Note that, for example, a pump casing (not shown) is coupled to the other end surface of the load side bracket 11.
The rotor shaft 14 cooperates with the rotor shaft 14 to form a pump portion, and an impeller (not shown) is fitted into the circular protrusion of the pump portion of the rotor shaft 14. Also, a pair of co-bearings 8 and 12 are connected to the sealed liquid 1 in the electric motor.
5 and is lubricated.

Next, a method of drawing out the lead wire 4 from the frame 7 of the structure as shown in FIG. 2 will be explained. 3. A predetermined length of the zW part 57 is attached to a predetermined location on the outer peripheral surface of the wooden lead wire 4! - Once fitted, a filling member 6 made of 1 liter of fat is injected to fill the gaps between the three lead wires 4 and the protection member 5. Next, the stator 1 and the retainer 8W member 5 are molded into a predetermined mold (not shown).
At the same time, the outer circumferential surface of the retainer 31 member 5 is held between opposing peripheral edges of predetermined molding molds, and the molding molds are connected to each other. Next, a molding material made of a required resin is injected into the molding die, and after the resin has hardened, the prescribed molding die is disassembled, one end of which is connected to the coil end 3a, and each of the three lead wires 4 is The other end protrudes from the outer peripheral surface of the frame body 7.

The conventional electric motor of the type B is constructed as described above, and in particular, the lead wires 4 are pulled out in the manner described above, so that the gaps between the three lead wires 4 and the maintenance PJ member 5 and the three wires are In order to prevent the molding material injected into the molding die from leaking out of the molding die from the gap with the lead wires 4, the outer circumferential surface of the three lead wires 4 (C fits inside the protective member 5 and protects Since the member 5 must be filled with the filling member 6 made of resin, the work of pulling out the lead wire 4 from the frame body 7 is very troublesome, which increases the cost and reduces productivity. was there.

[Summary of the Invention 1] The invention of Party B was made in an attempt to eliminate such drawbacks, and involves connecting one end of the core wire exposed at both ends of the sheath of a cabtire cable having a prescribed heat resistance to the coil end. The mold material is injected and hardened by joining the sheath and sandwiching the outer circumferential surface of the sheath between the opposing peripheral edges of the molding die.

[Embodiments of the invention]

FIG. 3 shows an embodiment of the invention of Party B. In the figure, 16 is a predetermined length of a #4 cabtire cable with excellent heat resistance, such as a chloroprene cabtire cable or a hypalon cabtire cable, 16a is a sheath of a predetermined length of this cabtire cable 16, and 16b
The three core wires exposed at one end of the sheath 16a are connected to predetermined locations of the coil end 3a. The three core wires 16c are exposed at the other end of the sheath 16a and protrude 17 from the outer peripheral surface of the frame body 7. The rest of the configuration is the same as that of a conventional electric motor of this type, so a description thereof will be omitted.

Next, the core wire (lead wire) of something configured like this 1
A method of pulling out the parts 6b and 16c from the frame body 7 will be explained. A predetermined molding die (not shown) surrounds the stator 1 and the sheath a, and the outer circumferential surface of the sheath J6a is sandwiched between the opposing periphery of the predetermined molding die, so that the molding die B is joined to each other i. reactor. Next, for example, a molding material made of a required resin is injected into the molding die, and after the molding material has hardened, the predetermined molding mold is disassembled, and a three-piece core wire (lead wire) 16b is connected at one end to the coil end 3a. The other end portion J6C of each of the two ends protrudes outward from the outer circumferential surface of the frame body 7.

In addition, in Example B, the core wires 16b and 16c of the cabtire cable, which has poor heat resistance with 3 cores, are connected to the coil end 3.
Although the description has been made of a device that is coupled to a and pulled out from the outer circumferential surface of the frame 7, it is not limited to this embodiment.
For example, even if a four-core cabtire cable with excellent heat resistance is coupled to the coil end 3a and pulled out from the outer circumferential surface of the frame 7, the cable length will be too long.

〔Effect of the invention〕

As explained above, in an electric motor in which a stator is molded with a predetermined molding material, one end side of a core wire exposed at both ends of a sheath of a cabtire cable having a predetermined heat resistance is connected to a coil end. Since the molding material is injected and hardened by sandwiching the outer circumferential surface of the sheath between the opposing peripheral edges of a predetermined molding die, there is no possibility that the molding material will leak out of the molding die from the sheath clamping portion of the molding die. Defense 1
1-, the filling operation with the molding material is simplified, which has the effect of improving productivity and reducing manufacturing costs.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a conventional electric motor in which the stator is molded with molded material, Figure 2 is a cross-sectional view taken along the line ■-■ in Figure 1, and Figure 3 is an embodiment of the invention of B. FIG. In the figure, 1 is the stator, 2 is the stator V, core, 3 is the stator winding, 3a is the coil L1, and 7 is the molded material.
frame body, 8.12 is the same bearing, 11 is the load side bracket,
13 is a rotor core, and 14 is a rotor shaft. 3. The same symbols in the figures indicate corresponding parts. Agent Ayame 'JP Shin No. J

Claims (1)

[Scope of Claims] fil In an electric motor in which a stator is molded with a predetermined molding material, core wires are exposed at both ends of the sheath of a heat-resistant cabtire cable of a predetermined length that can withstand the molding heat during molding, and one end of the sheath is exposed. The core wire of the stator winding is connected to the coil end of the stator winding, and the outer peripheral surface of the sheath is held between the opposing peripheral edges of a predetermined molding die, A method for drawing out a lead wire from a mold mold, characterized in that the lead wire is made to protrude outward from the surface and a predetermined molding material is injected and hardened into the mold. (2) A method for drawing out lead wires from a mold mold according to item 1 of the Patent Kfi Claims, characterized in that the molding material is JfJ4 resin.