JP2004064819A - Armature coil forming apparatus and method - Google Patents

Abstract

A forming method and a forming apparatus suitable for forming a coil end portion of an armature coil by a direct winding method are provided.
In a forming apparatus for forming a coil end portion of a stator, a radial pressing body configured to move in a radial direction inside a core to form a wire, and to move axially outside a core in a forming apparatus. A first axial pressing body 15 for forming a wire is provided, and a drive mechanism 10 for interlocking an operation of pressing the radial pressing body 12 against the wire and an operation of pressing the first axial pressing body 15 against the wire.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in an armature coil forming method and a forming apparatus.
[0002]
[Prior art]
Generally, as a winding method applied to an inner rotor type stator, there are a direct winding method in which a wire is directly wound around teeth and an inserter winding method in which a previously wound wire is pushed into a slot.
[0003]
FIG. 2 shows the stator 1 on which the wire 5 is wound by the straight winding method, and FIG. 3 shows the stator 1 on which the wire 5 is wound by the inserter winding method.
[0004]
In the stator 1 by the inserter winding method, the coil end portion 6 of the winding becomes long, so that a step of forming the coil end portion 6 is required.
[0005]
The conventional forming method includes an operation of pressing the press plate in the axial direction of the core 2 to form the coil end portion 6 and an operation of pressing another press plate in the radial direction from the inside of the core 2 to form the coil end portion 6. Are repeatedly performed step by step so that the coil end portion 6 is accommodated in a predetermined size. Since the press plates are not moved together as described above, the coil end portion 6 is formed without applying an excessive force to the wire 5, and the wire 5 is prevented from being crushed and the insulation coating is prevented from being damaged and short-circuited. You.
[0006]
[Problems to be solved by the invention]
By the way, when the coil end portion 6 of the stator 1 is formed by the direct winding method, even if the press plates are moved together and formed, since the coil end portion 6 is short, excessive force does not act on the wire 5 and the wire 5 5 can be formed without damaging it.
[0007]
However, according to such a conventional molding method, since each press plate cannot be simultaneously moved corresponding to the short coil end portion 6, there has been a problem that the molding operation is troublesome.
[0008]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a forming method and a forming apparatus suitable for forming a coil end portion of an armature coil by a series winding method.
[0009]
[Means for Solving the Problems]
The first invention is applied to a method for forming an armature coil in which a wire is wound around a core in which a plurality of teeth are arranged side by side and project radially inward.
[0010]
A radial pressing body that moves in the radial direction inside the core to form a wire, and an axial pressing body that moves in the axial direction outside the core to form a wire, is provided with the radial pressing body. And the operation of pressing the axial pressing body against the wire is interlocked.
[0011]
The second invention is applied to an armature coil forming device in which a wire is wound around a core in which a plurality of teeth are arranged side by side and project radially inward.
[0012]
A radial pressing body that moves in the radial direction inside the core to form a wire, an axial pressing body that moves in the axial direction outside the core to form a wire, and this radial pressing body is formed into a wire A driving mechanism for interlocking the pressing operation and the operation of pressing the axial pressing body against the wire is provided.
[0013]
According to a third aspect, in the second aspect, the radial pressing body is divided into a plurality of pressing members in a circumferential direction thereof, and a conical cam for driving each pressing member in the radial direction is provided as a driving mechanism. The feature was adopted.
[0014]
According to a fourth aspect, in the third aspect, the cam is connected to the axial pressing body.
[0015]
Function and Effect of the Invention
According to the first and second aspects of the present invention, since the radial pressing body and the first axial pressing body are moved together to form the coil end portion, no trouble is required in the forming operation.
[0016]
Since the coil end portion of the stator by the direct winding method is short, even if the radial pressing body and the first axial pressing body are moved and formed together, an excessive force is prevented from acting on the wire. This prevents the wire material from being crushed or the insulating coating from being damaged and short-circuited.
[0017]
According to the third aspect of the present invention, the molding operation can be performed at once by forming the coil end portion by radially expanding the plurality of pressing members as the cam moves in the axial direction together with the axial pressing body. ,It does not take time and effort.
[0018]
According to the fourth aspect, the structure is simplified by moving the radial pressing body and the axial pressing body with a single actuator.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0020]
FIG. 2 shows a stator 1 in which a wire 5 is wound by a straight winding method as an armature coil to which the forming method of the present invention is applied. The stator 1 constitutes an inner rotor type three-phase motor, and has 24 teeth (magnetic poles) 3 and slots 4 which are radially arranged and protrude in the inner diameter direction. A wire 5 is wound around each tooth 3. A stator coil is formed. In this case, a distributed winding in which the wire 5 is wound over the five teeth 3 is performed. Four windings constituting each phase of U, V, and W are formed side by side in the circumferential direction. This winding has each coil part 7 that fits in the slot 4 and each coil end part 6 that goes out of the slot 4 and extends to five teeth 3.
[0021]
FIG. 1 shows a forming apparatus 10 of the present invention for automatically forming the stator 1 by a straight winding method. The forming apparatus 10 includes a jig 11 for fitting the outer periphery of the stator 1 slidably in the axial direction, a radial pressing body 12 moving in the radial direction inside the stator 1, and an axial pressing body 12 outside the stator 1. , A second axial pressing body 16 that sandwiches the stator 1 in the axial direction between the first axial pressing body 15 and the first axial pressing body 15, and a coil that presses the radial pressing body 12 There is provided a drive mechanism 20 that simultaneously links the operation of forming the end portion 6 and the operation of pressing the axial pressing body 15 to form the coil end portion 6.
[0022]
The jig 11 is formed in a cylindrical shape, and is fixedly provided on the gantry 30. The stator 1 is positioned in the radial direction by being housed inside the jig 11.
[0023]
The radial pressing body 12 is formed by being divided into a plurality of pressing members 13 in the circumferential direction. Each pressing member 13 moves in the radial direction of the stator 1 by sliding along the guide rail 31. The guide rail 31 extends radially on the gantry 30.
[0024]
Each pressing member 13 has a cylindrical upper and lower pressing portion 13 a pressed against each coil end portion 6 of the stator 1, and a concave portion 13 b recessed facing the tip of each tooth 3. Thus, the pressing members 13 can press the coil end portions 6 radially outward by a predetermined distance from the end surfaces of the teeth 3 without the respective pressing members 13 interfering with the teeth 3.
[0025]
The first and second axial pressing bodies 15, 16 are formed in a disk shape. The first axial pressing body 15 disposed above the stator 1 is slidably supported in the axial direction of the stator 1 via a guide column (not shown) provided upright from the gantry 30. The second axial pressing body 16 disposed below the stator 1 is provided on a gantry 30.
[0026]
As the drive mechanism 20, a spring 21 for drawing each pressing member 13 radially inward, a conical cam 22 for driving each pressing member 13 radially outward against the spring 21, a cam 22 and a first A pressing cylinder 23 for driving the axial pressing body 15 together in the axial direction of the stator 1 is provided.
[0027]
Each pressing member 13 is formed with an inclined surface 13c that faces the cam 22 and is inclined in a conical shape. As the cam 22 descends, each pressing member 13 is smoothly driven radially outward while sliding the inclined surface 13c against the cam 22.
[0028]
The pressing cylinder 23 includes a rod 24 that moves up and down. The cam 22 is fixed to a lower end of the rod 24, and the first axial pressing body 15 is fixed via an arm 25 extending radially from the rod 24.
[0029]
Next, a method of forming the stator 1 by the forming apparatus 10 will be described.
(1) The stator 1 in which the wire 5 is directly wound around the core 2 by a winding device (not shown) is set on a jig 11 of a molding device 10.
(2) The pressing cylinder 23 lowers the rod 24, drives each pressing member 13 radially outward via the cam 22, and moves the first axial pressing body 15 downward in conjunction with this to move each coil end. The portion 6 is compressed between the first axial pressing body 15 and the second pressing body 16 and between the pressing members 13, and the coil end portion 6 is accommodated in a predetermined size.
(3) The pressing cylinder 23 raises the rod 24, raises the cam 22 and the first axial pressing body 15, and removes the stator 1 from the jig 11.
[0030]
By moving the radial pressing body 12 and the first axial pressing body 15 together to form the coil end portion 6 as described above, the forming operation does not require much work.
[0031]
Since the coil end portion 6 of the stator 1 by the direct winding method is short, even when the radial pressing body 12 and the first axial pressing body 15 are moved and formed together, it is possible to suppress an excessive force from acting on the wire 5. . This prevents the wire 5 from being crushed or the insulating coating from being damaged and short-circuited.
[0032]
The radial pressing body 12 is divided into a plurality of pressing members 13 in the circumferential direction, and expands radially as the cam 22 descends to form the coil end portion 6 so that the forming operation can be performed at once. It can be done and hassle-free.
[0033]
The structure is simplified by moving the radial pressing body 12 and the first axial pressing body 15 together by a single pressing cylinder 23.
[0034]
Note that the first axial pressing body 15 and the second axial pressing body 16 may be moved together when the coil end portion 6 is formed so as to sandwich the stator 1 in the axial direction.
[0035]
It is apparent that the present invention is not limited to the above-described embodiment, and that various changes can be made within the scope of the technical idea.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a molding apparatus showing an embodiment of the present invention.
FIG. 2 is a perspective view of the same stator.
FIG. 3 is a perspective view of a stator showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stator 6 Coil end part 10 Forming device 11 Jig 12 Radial pressing body 13 Pressing member 15 First axial pressing body 16 Second axial pressing body 20 Drive mechanism 22 Cam 23 Press cylinder

Claims (4)

In a method of forming an armature coil in which a wire is wound around a core in which a plurality of teeth are arranged and protruding radially inward,
A radial pressing body that moves in the radial direction inside the core to form a wire, and an axial pressing body that moves in the axial direction outside the core to form the wire, and presses the radial pressing body against the wire A method for forming an armature coil, wherein an operation and an operation of pressing an axial pressing body against a wire are linked. In an armature coil forming apparatus in which a wire is wound around a core in which a plurality of teeth are arranged side by side and project radially inward,
A radial pressing body that moves radially inside the core to form a wire, an axial pressing body that moves axially outside the core to form a wire, and an operation of pressing the radial pressing body against the wire The apparatus for forming an armature coil according to claim 1, further comprising: a driving mechanism for interlocking an operation of pressing the axial pressing body against the wire rod. The radial pressing body is divided into a plurality of pressing members in the circumferential direction,
The armature coil forming apparatus according to claim 2, further comprising a conical cam that drives each pressing member in a radial direction as the driving mechanism. The armature coil forming apparatus according to claim 3, wherein the cam is coupled to the axial pressing body.

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