JPS6056386B2 - Pusher for inserting the windings of rotating electric machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a winding insertion device for press-inserting multiple layers of coils into slots of an iron core in a rotating electrical machine, and particularly to improvements to the winding presser.

Generally, a stator in which two layers of windings are inserted into each slot, an inner and outer layer, protrudes from the end of a stator core 1, as shown in FIG.

The first outer layer coil 3 in the slot 2 located on the outer peripheral side of the coil end portion and the second inner layer coil 4 located inside the slot 2 form two inner and outer layers, respectively. In this stator in which the coils 3 and 4 are inserted into two layers, the inner and outer layers,
A conventional winding insertion device for inserting each of these coils 3 and 4 in the first insertion step was constructed as shown in FIGS. 2 to 6. That is, in the figure, 5 is a fixed base, 6 is a large number of broods set up in an annular shape on this fixed base and arranged so as to form a cylindrical shape as a whole, 7 is a wedge guide, and 8 in Figure 3 is a hydraulically operated A winding presser connected to a gun of an operating cylinder (not shown) and moving up and down inside each of the blades 6 has a number of notches 9 on its periphery through which each of the blades 6 is slidably inserted. It consists of a rear pressing part 10 with respect to the pushing direction, and a front pressing part 12 having four protrusions 11 extending radially from the center and reaching the inner ends of each of the notches 9.

In addition, 13 in the figure is the top pressing surface of the rear pressing part 10, 15 is a coil flip-up part formed at the tip of each of the projections 11,
16 indicates a blade insertion groove therebetween. In order to insert the outer layer coil 3 and the inner layer coil 4 with this winding insertion device, first, the outer layer coil 3 and the inner layer coil 4 are inserted into each of the protrusions 11 of the front pressing section 12, and at a position where they are in contact with the top pressing surface 13 of the rear pressing section 10. The inner layer coil 4 is placed over each blade 6, and the outer layer coil 3 is similarly placed over each blade 6 at a position in contact with the upper surface of each protrusion 11 of the front pressing section 12. That is, the outer layer coil 3 and the inner layer coil 4 are arranged as shown in FIGS. 2, 4, and 5.
Next, set the stator core 1 around the outer periphery of each blade 6,
The upper end of this core 1 is held down by a clamp lever (not shown), and the presser 8 is raised to the position shown in FIG.
After inserting the inner and outer coils 4 and 3 into the respective slots 2, the pusher 8 is lowered to complete the insertion of the inner and outer coils 4 and 3.

In this way, with the conventional device described above, each of the inner and outer coils 4 and 3 can be inserted into the slot 2 of the stator core 1 in a single insertion process, but as shown in FIG. When looking at the coil 3, the protrusion 1 of the front pressing portion 12
1 hooks and inserts a portion of the coil 3, the remaining portion that is not hooked cannot be sufficiently lifted up from the blade 6, and as a result, the coil pool at the insertion completion position of the inner layer coil 4 is blocked. As a result, the wedge 14 cooperating with the inner layer coil 4 does not fit into the slot 2, and ultimately the amount of insertion of the inner layer coil 4 is small, and the balance between the coil ends of both the inner and outer coils becomes poor. A shortcoming occurred. This invention has been devised to eliminate the above-mentioned drawbacks, and embodiments of the invention will be described below with reference to FIGS. 7 to 13.

First, in FIG. 7, the same parts as in the conventional one are indicated by the same reference numerals, and 21 in the figure indicates the front and rear pressing parts 1.
The tip of the protruding part 22 of the intermediate pressing part provided between 2 and 10 is located inside so as to be in contact with the inner top surface of each blade 6, and 23 in FIG. 8 is a similar intermediate pressing part lever. In some cases, coil spring-up parts 25, 25 are particularly formed at the tips of the projections 24, and the coil spring-up parts are formed on the rear pressing part 10 so as to protrude into the gaps between the respective blades 6. The innermost ends of each cut portion 9 are made to protrude outside the inscribed circle. Reference numeral 26 denotes a U-shaped groove formed between the coil flip-up parts 25, 25, which are connected to the side surfaces of each notch part 9 of the rear pressing part 10, and each blade 6
The inner top surfaces of the two are in contact with each other. In order to insert the inner layer coil 4 and the outer layer coil 3 at once with the winding insertion device having the pusher of the present invention having the above configuration, if the winding diagram of FIG. 9 is taken as an example, then As shown in the figure, the outer layer coil 3 and the inner layer coil 4 are placed around the blade 6, respectively. (However, in Fig. 10, the left half shows the case using the intermediate pressing part 21 shown in Fig. 7, and the right half shows the case using the intermediate pressing part 23 shown in Fig. 8. In this arrangement state, each blade 6 is inserted into the hollow part of the stator core 1, and the presser 8 is inserted into the 11th
As shown in the figure, when looking at the relationship between the above-mentioned pressing parts and the inner and outer layer coils 4 and 3 during the ascent, the left half of the figure shows the outer layer coil 3 due to the projection 11 of the front pressing part 12.
is separated from the pressing surface 13 of the rear pressing part 10 by a height of H1, and the insertion inclination angle is 01. In the right half, the protrusion 24 of the intermediate pressing part 23 has an angle of θ4 with respect to the line perpendicular to each blade 6, so that the pressing surface of the rear pressing part 10 is the best. 13 by H2, the insertion inclination angle can be set to a predetermined angle θ3. Therefore, the inner and outer layer coils 4 and 3 can be smoothly inserted without the locking phenomenon between the blades as in the conventional case. Since the wedge is inserted, the conditions are favorable from the standpoint of the coil flip-up action, and the insertion of the wedge is also good.
Also, the balance between the inner and outer layer coils at the coil ends is good.
The inner and outer coils 4 and 3 can be inserted into the slots 2 of the stator core 1 together with the wedge 14 smoothly and stably. Note that the above embodiment shows an example in which a stator core 1 with 24 slots in a single-phase motor has two stages of outer layer coils 3 and two stages of inner layer coils 4 to form four poles.
According to the winding diagram of 24 slots in a three-phase motor as shown in FIG.
The entire three-layer coil 27, 28 is arranged as shown in Figure 3.
, 29 can be inserted at the same time, and the position, height, number,
It goes without saying that by changing the shape or combining them with each other, it can be applied to a desired number of phases, poles, slots, coil stages, and coils.

Further, it is also possible, of course, to manufacture the rear pressing part 10, the front pressing part 12, and the intermediate pressing part 23 of the pressing element 8 separately, and then combine them together.

As described above, in this invention, the presser is formed as a rear pressing part, a front pressing part, and an intermediate pressing part between them in the pushing direction, and the tip of the protrusion of the intermediate pressing part is also formed like the front pressing part. A coil flip-up part that protrudes into the gap between the blades is provided to reduce the insertion inclination angle of the inner layer coil as well as the outer layer coil, so that both coils can be inserted into the wedge without causing a locking phenomenon between the blades. This has the effect that multiple layers of coils can be inserted simultaneously in a single insertion process in a smooth and stable state, and that a stator with a high coil space factor in the slot after insertion can be obtained.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a stator with coils in two layers, inner and outer.
Figures 2 to 6 show a conventional winding insertion device, with Figure 2 being a perspective view of the main parts thereof, Figure 3 being a perspective view of the presser, and Figure 4 being a plan view showing the set state of the insertion coil. Fig. 5 is an enlarged sectional view of the main part showing the state of the presser in the middle of pushing it in, Fig. 6 is an enlarged sectional view of the main part showing the state when the pusher is pushed to the predetermined uppermost end, and Fig. 7 11 are diagrams showing an embodiment of the present invention, FIG. 7 is a perspective view of a presser, FIG. 8 is a similar perspective view showing another embodiment of this presser, and FIG. 9 is a winding. Fig. 10 is a plan view showing the set state, Fig. 11 is an enlarged sectional view of the main part showing the state in the middle of pushing the presser, and Fig. 10 is a plan view showing the set state.
FIG. 2 is a developed view of a three-layer winding, and FIG. 13 is a plan view showing its set state.

Claims (1)

[Claims] 1. A rear pressing part which has a number of blade insertion notches on the peripheral edge and a pressing surface for the inner coil at the top, and a pressing protrusion of the outer coil extending from the center to the inner end of the notches in a radial direction. A front pressing part having a front pressing part is provided between the two pressing parts, and a protruding part thereof is projected in the pushing direction by a predetermined height from the pressing surface of the rear pressing part to give a predetermined insertion inclination angle to the inner layer coil. An intermediate pressing portion is formed, and a coil flip-up portion of each coil is formed at the tip of each protrusion of the front pressing portion and the intermediate pressing portion to protrude into the gap between the blades. A pusher for inserting windings in rotating electric machines.