JPS5953064A - Armature - Google Patents

Abstract

PURPOSE:To eliminate the leakage and adherence of resin on the surface of a commutator when casing with the resin by forming a groove for inserting an O- ring on the outer periphery of the commutator which makes contact with a riser which is connected at the terminal of an armature coil. CONSTITUTION:A groove 24 which has suitable width and depth is formed on the outer periphery of a commutator 2 at the part which is connected to a riser 2d. The width of the groove 24 is formed in the size adapted for an O-ring 19 which is engaged with the groove 24, and the depth is formed to be equal to or smaller than the outer diameter of the riser 2d in the diameter of the center of the ring 19 to be engaged. The cut and raised part in which an undercut groove 2e makes contact with the end of the riser 2d is removed due to the groove 24. When a completed assembly is mounted in a casting mold, the ring 19 engaged with the groove 24 of the commutator 2 has no undercut groove 2e at the part which makes contact with the bottom of the groove 24, the neck of the commutator 2 is pressed by the inner surface of the upper mold 11, and resin in a cavity 14 does not leak to the surface of the commutator 2 and flow into the groove 2e.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an armature, particularly an armature having a structure in which the armature wires and a commutator connected to the terminals of the windings are cast in resin and fixed together. .

An object of the present invention is to obtain an armature in which resin does not leak and adhere to the commutator surface when it is constructed with resin.

The ff114 r-iJ of the present invention: , fi, i- A connecting wire and a rectifier J- connected thereto are integrally hardened with 4&J resin. NIV l'
+fl: Child is upper 1f2it+, 4rJ child? X, 0 on the outer peripheral part where J2 is connected to the riser part where the wire glue 54 end is connected
'Having a groove for inserting a J-ring is defined as k%fa.

The conventional armature and +if armature embodiments of the present invention will be explained below with reference to the drawings.
It shows the appearance of the flat shape 1it which has been made i-1, 1-
2, 1-3...in is a plurality of flat electric machine T-windings, 2 is a commutator connected to this winding, 31 is a rotor shaft to which the commutator 2 is fixed on the side, 4 tJ These were all fixed together (~j fat).

In the flat armature shown in Fig. 1 (a) + (b), there are multiple flat armatures! The armature is arranged in a circular plate shape around the entire center of the rotor axis, but since this armature does not have an iron core to support the windings, it is necessary to use resin to form the 1h armature windings into a flat disk shape. Generally, it is cast integrally with the commutator, and the main part of the manufacturing process is shown in Figure 2 (a).
This will be explained with reference to r(b) and FIG. 3(a) + (b).

Figures 2 (-) and (b) show a plurality of flat-wound armature windings 1-1.1-2...1-n centered around the axis. The parts were laid out in a disk shape, and each winding was temporarily fixed with 4A adhesive, and the U11 end of each winding was 1c in total, 1ctk.

This shows the state in which the wires have been connected to each segment of the child 2 and the wiring has been completed. Figures 3(a) and (b) show the completed wire assembly.
The armature winding and commutator are shown mounted on a mold for casting with (O] resin, 11 is the upper mold of the mold, 12 is the lower mold of the mold, and 13 is the resin part provided in the upper mold 11. Injection hole, 14 is a wall formed by the upper mold and the upper mold, 15 is a dowel pin for the upper mold and lower mold, 16 is a center pin, 17 is a commutator positioning pin, 1
8 is an IL armature winding alignment mark provided on the edge of the lower mold 12, and 2b is a small hole for positioning provided on the end face of the commutator.

FIGS. 4(a) and 4(b) are a plan view and a side view of a conventional commutator, where 2s is a segment of commutator 2), 2d is a riser part connecting the terminals of the armature winding, and 2e is a segment 2I.
This is an undercut groove formed by excavating the insulating part between the segments so that it does not protrude beyond the outer periphery of the segment.

Conventional %i,t 4! , Q ''F It is shown in Fig. 5 that the armature winding and commutator are cast in resin and fixed together. The central lower cavity 12-2 of the lower mold 12 shown in FIG.
Inner alignment f + ir, 12 efforts 1: Positioning d provided in the mold
) After fitting the pin 17 into the small hole zb of 'Itn υir, j' 2 and aligning the commutator 2 to the position 1.41J12, the ring 19 was fitted onto the commutator. Type 12
Still touching the stepped part 12-i provided at the middle part of the upper mold 11, then... Attach position 11 with pin 15 to tighten the upper and lower molds.

As a result, the neck of the commutator 2 is pushed by the upper mold, and the O-ring 19 is pressed between the riser part 2d of the commutator and the stepped part 12-1 of the lower mold.
is pressed, and the flow of resin to the cavity 12-2 is cut off through the lower part of the =1 mold into which the commutator-2 is inserted from within the cavity 14 of the mold.

However, even if this is done, the diameter of the center line of the O-ring 19 is usually larger than the outer circumference of the riser part 2d, so a gap is likely to occur between the end faces of the O-ring 19 and the riser part 2d, and the The sealing effect of the O-ring 19 fitted on the outer periphery was not complete, and the injected resin leaked into the commutator from the cavity 14 and into the second cavity 12-2, contaminating the surface of the commutator and further undercutting it. There was a drawback that there were many inconveniences that occurred due to the intrusion and the inconvenience of making it impossible to use the OL machine after casting with resin. That is, the undercut hole 2e provided to maintain insulation between the segments of the commutator extends to the riser portion 2d as shown in FIG. V in the circumferential direction on the contact surface
? As a result of the presence of the two undercut grooves in the contact position, the resin leaking from the gap created at the contact area between the riser part 2d and the O-ring leaks to the outer periphery of the 3-IC element via the undercut groove. In many cases, the completed armature was rendered unusable.

Lick with leaked resin like this? If, in order to prevent the child from becoming contaminated and unusable, apply paraffin or silicone rubber, etc. to the outer circumference and undercut groove of the child. Wrap it so that it does not come into direct contact with the resin. 1: Although it is possible to prevent contamination of the commutator due to the leaked resin when casting it in the above-mentioned 8-shaped mold, it is possible to prevent contamination of the OIC element by leaking resin, but it is possible to prevent the OIC element from being contaminated by the leaked resin. It takes many thousand r to remove silicone rubber etc.
＋jl "C" However, if the paraffin, silicone rubber, etc. that entered the undercut groove were not completely removed at one time, the product would become unusable, which was not a sufficient countermeasure.

The present invention eliminates the drawbacks of the prior art as described above and provides an armature that can prevent rectification-r pollution with a simple configuration.Examples thereof are shown in FIGS. Figure 7 (
Shown in a) and (b).

In the present invention, as shown in FIG. 6 (PL), the commutator 21
IfT, 24 of an appropriate width and depth is provided along the outer periphery of part 1 of the outer periphery of the part 1 and the portion 2dK that connects with the f part 2dK.

No. 61 (b) & Mako 7H24J) In the enlarged view, the width of the t1 tube 24 wt and the side Gr are white
O-ring 19; quotient 11,8, and depth d)
The diameter 1 at the center of the O-ring lC to be fitted is equal to or smaller than the outer diameter I of the riser portion 2d.

The present invention'Ijr, -C in +1 child is 6□v24 provided in the 几゛ξRyuko 2 like the upper h1shi 7 Dakatsu j1! 'i: 2 What is the round-up capital where e touches the end face of riser section 2d? 1b.

24, and the ID2 eyebrow 0 ring 19 is in contact with the groove 24 (at least the bottom part of /♂#24 is undercut on the side that connects with the end surface of the riser part 2d) iW
ceases to exist. Therefore, FIG. 7(a).

As shown in (tl), when the completed wire assembly is ceremonially attached to the metal jJ type, the O-ring 19 attached to the γ[q24 of the regular 11ifter is one undercut TW in the part that contacts the bottom surface of the groove 24. ? 2 Without e, -t of Si'E υ1j child 2
a'? 'iB is pushed inward of the upper mold 11, and is sandwiched and pressed between the end face of the user part 2d and the stepped part 12-1 of the lower mold 12, and the table A' is pressed inside the hollow cavity 14. The resin is commutator 2
The resin acts to prevent leakage into the surface of the undercut groove 2e and the undercut groove 2e. 20 surface and undercut) 572 There is no need to apply paraffin or silicone rubber to the surface of the commutator as in the past, so it is no longer necessary to remove paraffin or silicone rubber after casting. It shortens the process by eliminating the need for strips, eliminates the use of auxiliary materials such as paraffin and silicone rubber, and prevents contamination of the commutator due to resin leakage during G4 manufacturing, greatly improving product yield. There are great industrial benefits.

[Brief explanation of the drawing]

Figure 1 (11), (l)) shows a cross section of a part of a conventional flat armature.1. DA-'F surface and side view, Figure 2<h>
+ (b) is the flat d of the completed wire assembly consisting of the electric machine prewinding i, 1j1 and the commutator. Figures and front view, A1, rl (Figure 3 (n) + (b) is a 101-sided view showing the completed mold and wire assembly, and a plan view of its lower mold, Figure 4 (a) + (b) is The plan view and side view of the commutator of a conventional 11-value machine, FIG.
(b) is the original l) Side view showing the commutator of Akiko Isogo 1. Enlarged view of <No.I and a part thereof, FIG. 7(a). (b) t; J, σ! Group 1 of type J and armature of the present invention? 'j
FIG. 1 is a cross-sectional view showing the completed body and an enlarged 1711 view of a portion thereof. 1-1, l-2, 1-3~ln - armature winding,
2... Commutator, 2b... Small hole, 2S... Sekume/
2d... riser part, 2e... undercut groove,
3...Rotor'lIl! ,,,v・4...Resin, 1
1... Upper mold, 12... Lower mold, 12-1... Step;
ISL 12-2...lower cavity, 13...injection hole,
14...Cavity, 15...Dowel pin, 16...Center pin, ', 17...Positioning pin, 18...Position 1
Fitting mark, 19...0 ring, 24...groove. Agent Patent Attorney Makoto Oki - +10 (0) 1 + I l] (b) +20 (0) 12 fields (b) +6 figure, (O) +7 field (0) 弗6111 (b)! '1 +-70(b)

Claims (2)

[Claims] (1) 'lj' made by integrally solidifying the 14 child winding and the commutator connected to it with resin:
An IEQ element, wherein the commutator has a groove for inserting a QIJ ring in an outer circumferential portion where the commutator contacts a riser part connecting the terminal end of the armature winding. (2) The depth of η・- provided on the outer periphery of the commutator is:
11. The armature according to claim 1, wherein the diameter of the center edge of the O-ring fitted in the groove is equal to or smaller than the outer diameter of the riser portion of the commutator.