JPS6237407Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a rotating electrical machine with an improved coil end processing structure.

(Prior Art) For example, in a motor, in order to prevent the coil ends of the coils housed in the slots of the stator core from coming into contact with the rotor or motor cover, the coil ends are molded using a molding machine, and then, The coil ends are inspected and corrected to control their dimensions, and then varnished.

(Problem to be solved by the invention) However, with the above configuration, the coil end is pressed down with a considerable force by the molding machine, so there are problems such as wire breakage or peeling of the coating, which can cause rare shorts. However, it also has the drawback that inspection and correction require a lot of effort and are disadvantageous in terms of cost.

Therefore, the purpose of this invention is to mold the coil end with a molding machine while reliably preventing the coil end from coming into contact with the rotor, motor cover, etc.
There is no need for inspection or correction to control its dimensions.
Moreover, it is an object of the present invention to provide a rotating electrical machine that can prevent wire breakage, rare shorts, etc. as much as possible.

[Structure of the invention] (Means for solving the problem) The rotating electric machine of the invention has an inner cylinder part and an outer cylinder part, and one end side of each cylinder part is connected to each other by an annular end plate part. A pair of insulating covers are placed on both ends of the stator core to cover the coil ends.
One of the pair of insulating covers is provided with an engaging part, and the other is provided with an engaged part that prevents the respective insulating covers from moving in a direction away from each other by hooking and engaging with the engaging part. The present invention is characterized in that the respective insulating covers are connected to each other by hooking engagement between the engaging portion and the engaged portion.

(Function) The coil ends of the coils housed in the stator core are covered by the inner cylindrical part, the outer cylindrical part, and the annular end plate part of the insulating cover located on both ends of the stator core, so the coil ends are not exposed to the rotor or motor cover. contact is prevented. Moreover, both insulating covers are connected in a state where they are prevented from moving away from each other by the hooking engagement between the engaging part and the engaged part provided on one and the other, respectively. It is possible to reliably prevent the insulating cover from moving in the removal direction.

(Example) An example in which the present invention is applied to a motor will be described below with reference to the drawings. Reference numeral 1 denotes a stator core formed by laminating a large number of silicon steel plates, and has a large number of slots 2 on the inner periphery.
An insulating paper 3 is inserted inside, and a coil 4 is housed through this insulating paper 3. Reference numerals 5 and 6 designate a pair of insulating covers for covering the coil ends 4a and 4b of the coil 4 protruding from both sides of the stator core 1, which are made of an insulating material such as plastic. 8 and one end side of the outer cylindrical parts 9, 10 are integrally connected by annular end plate parts 11, 12, and a bottomed annular coil storage space 13, 14 is formed between the two cylindrical parts. . The inner cylindrical parts 7 and 8 of the insulating covers 5 and 6 are formed into a cylindrical shape with a diameter slightly larger than the inner diameter of the stator core 1, and the outer cylindrical parts 9 and 10 are made to match the outer shape of the stator core 1. Flat surface portions 9a and 10a are intermittently formed on the outer peripheral surface, and the height (axial direction) thereof is set slightly higher than that of the inner cylinder portions 7 and 8. Each 15 is a plurality of engaging claws corresponding to an engaging part, and these are the outer cylindrical part 9 of the insulating cover 5.
are integrally and intermittently protruded from the flat surface portion 9a. Each 16 is a plurality of frame-shaped connecting pieces corresponding to engaged parts, which are integrally extended to the flat surface part 10a of the outer cylindrical part 10 of the insulating cover 6 in correspondence with each of the engaging claws 15, By hooking and engaging with the engaging claw 15, when each insulating cover 5, 6 attempts to move in a direction away from each other, it comes into pressure contact with the engaging claw 16, and the movement is prevented by the engaging claw 15. It has the function of cooperating with and blocking.

Therefore, the coil storage space 1 of the insulation covers 5 and 6
Coil ends 4a, 4b of coil 4 in 3, 14
The insulating covers 5 and 6 are placed on both sides of the stator core 1 so as to accommodate the outer cylindrical parts 9 and 10, and the outer cylindrical parts 9 and 10 are fitted onto the outer peripheral surface of the stator core 1. Bring it into contact with the end face. In this state, the end plates 1 of the insulating covers 5 and 6
The inner surfaces of coils 1 and 12 abut against coil ends 4a and 4b (see FIG. 3), so that coil 4 is slightly compressed. Thereafter, the frame-shaped connecting piece 16 is hooked onto the engaging claw 15 to connect the two insulating covers 5 and 6 to each other. Then, the slightly compressed coil 4
Since the insulating covers 5 and 6 are urged apart from each other by the elastic force, the frame-shaped connecting piece 16 and the engaging claw 15 are more reliably engaged and engaged, and movement of the two is restricted. In this way, the coil ends 4a, 4
With part b covered with insulating covers 5 and 6, the whole part is then immersed in a varnish bath, for example, to undergo varnish treatment. As a result, the coil 4 is solidified as one piece, and even if the insulation coating of the coil 4 is peeled off when the insulation covers 5 and 6 are attached, the varnish attached to the surface of the coil 4 prevents insulation breakdown. This can be prevented as much as possible.

According to this embodiment configured in this way, the coil ends 4a, 4b are covered with the insulating covers 5, 6, so that insulation from other members can be reliably achieved, and the coil ends 4a, 4b are covered with the insulating covers 5, 6. There is no need to mold 4b to a dimension that does not contact the rotor, motor cover, etc., and there is no need for inspection and dimensional control.
Since there is no need for correction, productivity is improved and costs are reduced. Further, as described above, since the molding of the coil 4 can be omitted, disconnection of the coil 4, rare short, etc. can be prevented as much as possible, and reliability is increased. In addition, since the hooking engagement between the engaging claw 15 and the frame-like connecting piece 16 reliably prevents the insulating covers 5 and 6 from moving away from each other, even if the spring back of the coil end 4a4b Even if a force is applied to the insulating covers 5 and 6 in the direction of removal,
In that case, the engagement becomes deeper, and detachment of the insulating covers 5 and 6 can be reliably prevented and insulation reliability can be improved. Furthermore, when the inner cylindrical parts 7 and 8 are brought into contact with the end face of the stator core 1 as in this embodiment, the coil 4 does not protrude from the opening 2a of the slot 2 due to the inner cylindrical parts 7 and 8. This eliminates the need for a wedge to prevent the coil from protruding, which was conventionally inserted into the opening of the slot.
In addition, since the engaging claws 15 and the frame-like connecting pieces 16 are formed on the flat surface portions 9a and 10a of each insulating cover 5 and 6, special considerations are required for cutting out the mold during molding compared to the case where they are formed on curved surface portions. There is no need to do this, and moreover, reliable engagement between the two can be achieved during assembly.

In the above embodiment, the engaging claw 15 and the frame-shaped connecting piece 16 are integrally molded with the insulating covers 5 and 6, and the insulating covers 5 and 6 are connected by hooking and engaging them. The invention is not limited to this, and the engaging portion and the engaged portion may be constructed as separate parts from the insulating cover.

[Effects of the invention] As described above, in the present invention, the coil end is covered with an insulating cover having an inner cylindrical part and an outer cylindrical part, thereby preventing the coil end from coming into contact with the rotor, motor cover, etc. In addition, there is no need to mold the coil end with a molding machine or inspect or modify it for dimensional control, which prevents coil breakage and rare shorts and improves production efficiency. can improve sex. Furthermore, since both insulating covers are prevented from moving away from each other due to the hooked engagement between the engaging part and the engaged part, if springback of the coil end or the like causes the insulating covers to move away from each other, This has the excellent effect of reliably preventing the insulating cover from coming off even if force is applied.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is an overall perspective view, FIG. 2 is an exploded perspective view of the entire device, and FIGS. 3 and 4 are sectional views taken in different directions. . In the drawing, 1 is the stator core, 2 is the slot, and 4 is the stator core.
is a coil, 4a, 4b are coil ends, 5, 6 are insulating covers, 7, 8 are inner cylinder parts, 9, 10 are outer cylinder parts, 9a, 10a are flat surface parts, 11, 12 are end plate parts, 15 is The engaging claw (engaging portion) 16 is a frame-shaped connecting piece (engaged portion).

Claims (1)

[Claims for Utility Model Registration] 1. A device in which a coil is housed in a slot of a stator core, which has an inner cylinder part and an outer cylinder part, one end of each cylinder part is connected to each other by an annular end plate part, and the stator core a pair of insulating covers located on both ends of the coil to cover each coil end of the coil; an engaging portion provided on one of the pair of insulating covers; and an engaging portion provided on the other of the pair of insulating covers. and an engaged portion that prevents each insulating cover from moving in a direction away from each other by a hooking engagement with the engaging portion, and a hooking engagement between the engaging portion and the engaged portion. A rotating electric machine characterized in that the respective insulating covers are connected to each other when the insulating covers are connected to each other. 2. The rotating electric machine according to claim 1, wherein the inner cylindrical portion of the insulating cover is in contact with the end surface of the stator core. 3. The rotating electric machine according to claim 1 or 2, wherein the engaging portion and the engaged portion are formed on a flat surface portion of the outer peripheral surface of the insulating cover. 4. The rotating electric machine according to any one of claims 1 to 3, wherein the engaging part and the engaged part are formed integrally with the insulating cover. 5. The rotation according to any one of claims 1 to 4 of the utility model registration claim, characterized in that at least one of the two insulating covers is in contact with the coil end toward the other insulating cover side. Electric machine.