JPS6271455A - Inserter for stator coil - Google Patents

Abstract

PURPOSE:To prevent the generation of buckling on the insertion of a wedge while obviating the damage of a coil by forming the outer circumferential section of a stripper pressed against the wedge as an inclined plane, a diameter thereof is gradually reduced toward the inserting end side. CONSTITUTION:In a device in which a stator coil 12 is crossed between an annularly arranged blade 5, a stripper 6 and a pusher 10 are slid and the stator coil 12 and a wedge 11 are inserted into a slot 2 for a stator core 1, a section pressed against the wedge 1 in the outer circumferential surface of the stripper 6 is shaped in an inclined plane 6a in which the outer diameter of the section pressed against the wedge is gradually reduced toward the inserting end side. Accordingly, buckling is not generated in the wedge 11 when the wedge 11 is pushed and moved by the pusher 10, and the damage in the stator coil 12 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a stator coil insertion device that automatically inserts a stator coil wound in a loop shape in advance into a slot in a stator core of a rotating electric machine.

(Technical Background of the Invention) A device for automatically inserting a stator coil wound in a loop shape in advance into a slot in a cylindrical stator core of a rotating electric machine is disclosed in Japanese Patent Laid-Open No. 59-2549 and Japanese Patent Laid-Open No. 59-1989. -14347 and many other documents, it is not only already known, but also has been implemented many times.

Its typical configuration consists of a large number of rod-shaped blades installed on a base in an annular arrangement that abuts the inner diameter side end surface of the teeth between each 11 slots of the stator core, and moves along these blades. A stripper, etc., inserts the coil passed between the blades into the slot by pulling the coil in the longitudinal direction of the strip using the blade as a guide. It consists of a wedge guide provided to guide the wedge, and a pusher 17- for pushing and moving the wedge along this wedge guide and inserting it into the slot.

[Problems with the day-ahead technology]

In such a coil insertion device, one wedge is pushed by a pusher and moved toward the coil, thereby being inserted into the slot from its longitudinal end. In the insertion process of this test, the insertion resistance is small at the initial stage of insertion, but as the number of inserted legs increases, the contact area with the slot inner surface increases, so the frictional resistance increases and gradually increases. For this reason, if the number of turns of the coil is large and its cross-sectional area increases, that is, if the space factor is increased, the insertion resistance of the wedge will increase, and the wedge may buckle during marking movement by pushing.

Japanese Unexamined Patent Publication No. 59-2549 discloses an invention for preventing this buckling phenomenon, but this buckling prevention means may accidentally damage the wedge or coil, resulting in poor insulation. No answer has been disclosed regarding measures to prevent this from becoming a cause.

[Object of the Invention] Therefore, an object of the present invention is to prevent buckling of the wedge when inserting the wedge together with the coil into the slit, and to prevent the 1F prevention means from damaging the wedge or the coil. An object of the present invention is to provide a stator coil insertion device that can prevent the above problems.

[Summary of the invention]

By moving along a large number of blades arranged in a ring, the device of the present invention moves the coil that is passed between desired blades by pulling the blades as guides in the longitudinal direction of the slot. In a device that has a stripper for inserting this into the slot, the outer circumference of the stripper has a diameter that becomes smaller toward the insertion end at the part that is pressed into contact with the insertion end of the rod that is pushed into the slot of the stator core by the pusher. The wedge is characterized by forming an inclined surface portion, and when the wedge comes into pressure contact with this inclined surface portion, a component force is applied from this inclined surface portion in the slot insertion direction, and as a result, the wedge is pulled by the stripper and simultaneously pressed by the pusher. It was designed so that

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG.

In the drawings, reference numeral 1 designates a stator core having a cylindrical shape and having a plurality of slots 2 opening on its inner peripheral surface arranged in the circumferential direction, and 3 a coil insertion device having a base 4 . In this coil insertion device 3, a large number of rod-shaped blades 5 are provided in an annular arrangement on the holder 4, each of which is located in the cavity of the stator core 1 and inserted into a desired tooth 2a between each sut 2. 6 is a stripper that is reciprocated by a cylinder rod 7 (not shown) provided on the base 4, and on its outer periphery is As shown in , a large number of guide grooves 8 are formed in which each blade ε is fitted so as to be relatively slidable.Furthermore, a large number of II long guides 9 are provided on the base 4 in an annular arrangement. As shown in FIG. 3, the respective tips can be positioned at the axial end faces of the teeth 2a of the stator core 1.

Reference numeral 10 denotes a pusher, which pushes the pattern 11 for preventing the coil from popping out, which is supplied between each wedge guide 9, to the wedge guide 9.
The stripper 6 moves forward and backward while keeping a synchronized relationship with the stripper 6, since the stripper 6 is pushed in the direction of the slot 2 along the stripper 6.

The configuration up to now is no different from the known configuration.

Now, in the process of inserting the stator coil 12, which has been previously wound in a loop I shape, into the slot 2 together with the pattern 11 on the outer periphery of the stripper 6, an inclined surface is formed on the portion that presses against the outer surface of the insertion end portion of the wedge 11. 6a. That is, this inclined surface portion 6
As can be understood from Fig. 3 and Fig. 4, a is located between each guide groove 8 of the stripper 6 and is arranged in a circular shape as a whole, and the diameter becomes smaller toward the insertion end of the stripper 6. It is inclined at an angle θ in the direction. Note that 13 is slot insulation.

゛ Next, I will explain the operation of the above structure. In the initial state, the stripper 6 is in the retracted position as shown by the two-dot chain line J in FIG. . In this state, the rod 7 advances the stripper 6, and at the same time the pusher 10 pushes out the stripper 11.As shown in FIG. The stator coil 12 is moved forward together with the stripper 6 while being in contact with the inclined surface 6a of the slot 2, while the stator coil 12 is in contact with the head of the partial stripper 6, which is the coil end, so that the stator coil 12 is moved forward in the longitudinal direction of the slot 2. During this process, the stator coil 12 and the wedge 11 are inserted into the slot 2 as shown in FIG. 2. After this, the stripper 6 and the bushima-10 are moved backward.

Now, in the above coil insertion process, when the insertion end of the wedge 11 starts to be inserted into the slip 1-2, as shown in FIG. The pressure contact force (force in the direction perpendicular to the contact surface) between the outer surface of the stem 11 is upper bounded by the increase in compression received from the stator coil 1) 2 as the insertion amount increases, and The component force due to (
Repulsion force) Fx increases and this is it! 11, and acts on this wedge 11 as if it were being pulled by the stripper 6. As a result, model 11 has stripper 6 and g! 11, the space factor of the stator coil 12 is set high, and as the insertion amount increases, the pushing resistance increases, making it difficult for ctJ to buckle. Therefore, a 4M winding structure with a high C space factor can be easily obtained.

Also, there is a way to convey information from stripper 6 to model 11! ! 11
Since it is the inclined surface portion 6a that applies a component force in the insertion direction,
The inclined surface may be a smooth surface due to the nature of the wood.
As a result of forgetting to supply the stator coil 12 and performing the coil insertion operation at different times, the inclined surface portion 6a presses against the stator coil 12 and damages the stator coil 12, thereby preventing damage that may cause poor insulation.

It should be noted that the present invention is not limited only to the above embodiments,
For example, the inclined surface portion 6a does not necessarily have to be flat, but may have a somewhat arcuate shape as long as it is smooth.

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〔Effect of the invention〕

As described above, the present invention provides a wedge 11 in the outer circumference of the stripper.
By forming an inclined surface portion which becomes smaller in diameter toward the insertion end in the portion that comes into pressure contact with the insertion end portion of the slot, it is possible to prevent the wedge from buckling while the wedge is being pushed into the slot by the pusher. It is possible to provide a stator coil insertion device in which the inclined surface portion does not cause poor insulation and damage to the stator coil.

[Brief explanation of drawings]

Drawing '' relates to one embodiment of the present invention, and Fig. 1 does not show the state immediately after full insertion, but only the main parts! The cross-sectional view, Figure 2 is a view corresponding to the first valve immediately after the coil insertion is completed, and the third figure is a cross-sectional view.
The figure is an enlarged vertical sectional view taken along the line m--■ in Fig. 2, Fig. 4 is a side view showing the state of contact between the lilymph and the tree, and Fig. 5 is an overall side view. In the figure, 1 is a stator core, 2 is a slot, 3 is a coil insertion device, 5 is a blade, 6 is a stripper, 6a is an inclined surface portion, 9 is a wedge guide, 10 is a pusher 111 is a wedge, and 12 is a stator coil. be. Figure 2

Claims (1)

[Claims] 1. A large number of blades are arranged in an annular manner corresponding to the teeth between the slots of the stator core, and by moving along these blades, the coils that are stretched between the pair of blades are guided by the slots. a stripper that is inserted into the slot while being pulled and moved in the longitudinal direction; a wedge guide provided to guide the wedge in the longitudinal direction of each slot; and a wedge guide that moves in synchronization with the stripper to guide the wedge. and a pusher for pushing the stripper into the slot along the stripper, and a stator comprising: a pusher for pushing the stripper into the slot along the stripper; and an inclined surface portion whose diameter becomes smaller toward the insertion end at a portion of the outer periphery of the stripper that comes into pressure contact with the insertion end portion of the wedge. Coil insertion device.