JPH03230739A - Coil inserter - Google Patents

Abstract

PURPOSE:To secure space among the ends of coils projecting from a stator core and to carry out subsequent work without providing a hindrance in the event the coils are inserted into slots of the stator core by providing a sharp projection dividing the ends of the coils to a stripper head. CONSTITUTION:When a stripper head 10 is lowered and driven together with blades 4..., coils K... in slots (a)... remain unchanged. A projection 12 is formed into a sharp form, so that it is pulled out smoothly from between the ends of right and left coils K.... The ends of the coils K... are divided right and left to have an interval (n) of approximately 4-5mm in such a state that the stripper head 10 is completely lowered. According to the constitution, when coil division work as a subsequent process is carried out, a separator can be inserted into a space between the ends of right and left coils, and at that time, there is no coil deformation or disconnection fault, so that increased reliability can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a coil insertion machine for inserting a coil into a stator core constituting a motor, and particularly relates to an improvement of a stripper head.

(Prior Art) A motor includes a stator fixed to a case, and a rotor rotatably supported within the stator and provided with a rotating shaft. Further, the stator is configured by winding a coil around a stator core.

To explain, as shown in FIG. 3, the stator core S is made of disc-shaped iron plates laminated closely together to a predetermined height.

The stator core S has a generally ring-shaped planar shape, and is provided with a plurality of slots a radially and axially at predetermined intervals on its inner circumferential surface. The slot a is a groove formed in a substantially circular shape with a narrow opening on the inner peripheral surface side of the stator core S and a larger diameter in the direction of the outer peripheral surface.

After obtaining such a stator core S, insulating paper made of polyester resin material, for example, is brought into close contact with the circumferential surface of all slots a, and then coils are forcibly inserted using a coil insertion machine. . A main coil and an auxiliary coil are inserted into one slot, and an insulator called a wedge must be interposed between these coils.

FIG. 4 shows a state in which the coils K are inserted into the slots a of the stator core S to form the stator. The ends of the coils protruding from the end faces of the stator core S are divided into left and right sides with respect to the planar center line g of the stator core S when viewed from above.

A coil insertion machine is used to insert the coil K into the slot a. The coil insertion process in a conventional coil insertion machine is schematically shown in FIGS. 5(A) to 5(D). The stator core S having the slots a is fixedly held, for example, in an upper part of a coil insertion machine by some means.

In the figure, reference numeral 1 denotes an elevating mechanism, and a stripper 2 is integrally provided at the upper end of the elevating mechanism, and the elevating mechanism is adapted to be driven upward and downward relative to the stator core S. A stripper head 3 is integrally provided at the upper end of the stripper 2. The cross-sectional shape of the stripper head 3 is selected from, for example, a substantially mountain shape as shown in the drawing or a convex shape. In any case, the coil K can be forcibly pushed up as described later. 4 in the diagram is
These blades are provided on the same circumference of the upper end surface of the stripper head 3 at predetermined intervals and protrude in the vertical direction. That is, this blade 4... is the upper sear stripper head 3.
At the same time, the stator core S is driven up and down, and a circumferential position where it slides into contact with the inner circumferential surface of the stator core S is set. 5
. . . is a fixed wedge guide, which serves as a vertical guide for the stripper head 3 and blade 4 .

First, as shown in FIG. 5(A), a plurality of bundles of coils K are supplied and latched to the corner formed by the base end of the blade 4 and the upper surface of the stripper head 3.

At this time, with respect to the plane center line g of the stator core S,
Divide the coils K into the slots a on both the left and right sides and hang them. Then, the stator core S is held at a predetermined position. Said blade 41. , the upper end of the stator core S
Insert into the inner peripheral surface of the By driving the lifting mechanism 1, the stripper head 3 and blades 4 are lifted together with respect to the stator core S.

When these have risen to a certain extent, the stripper head 3 is inserted into the inner periphery of the stator core S, as shown in FIG. Since the positions of the coils K have been set, a part of the coil K is inserted into the lower end of the corresponding slot a. The upward movement of the stripper head 3 continues, so that the coil is gradually forcibly inserted into the slot a from the lower end to the upper end. The same figure (C
), when the stripper head 3 is raised to the uppermost end, the coils K... are connected to the slots a...
It is inserted over the entire length along the axial direction. As shown in Figure CD), the stripper head 3 is driven downward together with the blades 4, and the coils K in the slots a remain as they are. In the end, with one upward movement of the stripper head 3, the slot a of the stator core S
...Coil K... is inserted into all at the same time.

Then, the stator core S is sent to a subsequent process, and the coil K protruding from this end face undergoes a coil splitting process in which the end portion is divided into left and right sides from the plane center axis g using a separator. The stator has the shape and structure shown in the figure.

(Problem to be Solved by the Invention) However, the left and right coils K are inserted into the slots a of the stator core S by the coil insertion machine as shown in FIGS. 5(C) and (D). ), as shown in
The ends protruding from the end face of the stator core S are firmly in close contact with each other. That is, as the stripper head 3 rises, a portion of the coil is forcibly inserted into the slot a, and the portion of the coil within the slot a becomes almost fixed. On the other hand, especially the portion of the coil hooked to the stripper head 3 and blade 4 is in a substantially extended state because these upward movements continue. When the stripper head 3 rises to the uppermost position, the ends of the left and right coils K... are firmly in close contact with each other and pressed against each other, with no gaps at all between these ends.

From this state, the tip of the separator is inserted between the ends of the left and right coils K to divide the coil into left and right parts, but the ends of the coil K are firmly attached to each other. This makes it extremely difficult to insert. In addition, since the above coil is made by winding and bundling thin copper wires, it is not strong enough, and if the above separator is forcibly inserted, there is a risk that it will not only be easily deformed, but also cause wire breakage. Problems may occur.

The present invention has been made in view of the above circumstances, and its purpose is to ensure a gap between the ends of the coils protruding from the end faces of the stator core when inserting the coils into the slots of the stator core, It is an object of the present invention to provide a coil insertion machine that allows subsequent operations to be performed without any trouble.

[Structure of the Invention] (Means and Effects for Solving the Problems) The present invention supplies coils to predetermined positions of blades arranged at predetermined intervals on the same circumference, and inserts a stator core to a predetermined position of the blades. A coil insertion machine that inserts the coil into a slot of a stator core using a stripper head that is held and moves together with the blade, characterized in that the stripper head is provided with a sharp protrusion that divides the ends of the coil. This is a coil insertion machine.

In this way, by driving the stripper head together with the blade, the coil supplied thereto can be inserted into the slot of the stator core, and at the same time, the protrusion provided on the stripper head separates the left and right coil ends from each other.

Therefore, the next step to obtain a stator, which is dividing the coils using separators, is performed by inserting the tips of the separators into the ends of the already divided coils.
There is no occurrence of coil deformation or disconnection accidents.

(Example) Hereinafter, an example of the present invention will be described in Figures 1 (A) to D).
To explain with reference to , the shape and structure of the stator core S having the slots a .

In the figure, reference numeral 1 denotes the same lifting and lowering mechanism as the conventional one, and the same applies to the stripper 2 that is integrally provided at the upper end of the lifting mechanism. A stripper head 10 that is integrally provided at the upper end of the stripper 2 will be described later. At the upper end of the stripper head 10, blades 4 are projected and retracted vertically at predetermined intervals on the same circumference, and are driven up and down together with the stripper head 3. The fixed wedge guide 5 is set at a circumferential position in sliding contact with the inner circumferential surface of the stator core S, as in the conventional case, and serves as a lifting guide for the upper two stripper heads 10 and blades 4. The same applies to the provision of .

FIGS. 2(A) and (B) show the stripper head 1
Indicates 0. The proximal end thereof has a stepped stripper head body 11 directly connected to the stripper 2, and a protrusion 12 is integrally provided on the protruding surface of the stripper head body 11. The protrusion 12 has substantially triangular protrusions at both ends along the elongated direction, and is formed to have a sharp cross section.

First, as shown in FIG. 1(A), a plurality of bundles of coils K are supplied and latched to the corner formed between the base end of the blade 4 and the upper surface of the stripper head 10. At this time, with respect to the planar center line g of the stator core S, the coils K are separately hung in the slots a on both the left and right sides. Then, the stator core S is held at a predetermined position. The upper end portions of the blades 4 are inserted into the inner peripheral surface of the stator core S. The lifting mechanism 1 is driven to lift the stripper head 10 and blades 4 together with respect to the stator core S. When these have risen to a certain extent, the stripper head 10 is inserted into the inner circumferential surface of the stator core S, as shown in FIG. Above coil K...
・Since the position has been set, this part is inserted into the corresponding slot a...lower end. The above stripper head 10
continues to rise, and therefore the coils K are gradually forcibly inserted from the lower end to the upper end of the slot a. As shown in FIG. 1C, when the stripper head 10 rises to the uppermost end, the left and right coils K
... is inserted over the entire length within the slot a゛°゛. Also at this time, the end portions of the left and right coils K are substantially extended by the stripper head 10, and the protrusion 12 is interposed between them. As shown in the same figure (D), when the stripper head 10 is driven downward together with the blade 4..., the coil K in the slot a...
... will remain as is. Since the protrusion 12 is sharp, it can be smoothly pulled out from between the ends of the left and right coils K. When the stripper head 1o is completely lowered, the end of the coil K is divided into left and right parts, approximately 4 to 5 m11
A gap n of approximately 1 is maintained.

Therefore, the coil splitting, which is a post-process for the stator (stator core S1) into which the coil K obtained by such a coil insertion machine is inserted, involves inserting the end of the coil K protruding from the end face of the stator core S. It is further divided into left and right parts using a separator to form the state shown in FIG. 4 above. At this time, since the gap n exists, the separator can be easily inserted, and the coil can be reliably divided without deforming the coil or causing disconnection.

Note that the protrusion 12 provided on the stripper head 10 is not limited to the above-mentioned shape and structure.In short, when the coil K is inserted into the slot a of the stator core S, the ends of the coils K... It is sufficient if the gap n can be secured by interposing the gap n.

[Effects of the Invention] As explained above, according to the present invention, a sharp protrusion is provided on the stripper head, and the protrusion divides the end of the coil when the coil is inserted into the slot. During the coil splitting process, a separator can be inserted into the gap between the left and right coil ends, which eliminates coil deformation and disconnection accidents, resulting in improved reliability. .

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention, FIGS. 1(A) to 2(D) are explanatory diagrams sequentially showing the coil insertion work by this coil insertion machine, and FIG. 2(A) is a stripper. A plan view of the head, FIG. 3 (B) is a front view thereof, FIG. 3 is a perspective view of a general stator core, FIG. 4 is a perspective view of the stator,
FIGS. 5(A) to 5(D) are explanatory diagrams sequentially showing a coil insertion operation using a coil insertion machine showing a conventional example of the present invention. S...Stator core,...Slot, K...Coil, 0...Stripper head, 2...Protrusion.

Claims (1)

[Claims] Coils are supplied to predetermined positions of blades arranged at predetermined intervals on the same circumference, the stator core is inserted and held in the predetermined position of the blade, and the coil is inserted into the slot of the stator core by a stripper head that moves together with the blade. A coil insertion machine for inserting a coil, characterized in that the stripper head is provided with a sharp protrusion that divides the ends of the coil.