JP2006020448A - Work piece rocking apparatus and varnish impregnator for stator coil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a work piece rocking apparatus and a varnish impregnator for a stator coil wherein an entire stator coil can be impregnated with varnish without rotating the coil on its axis and the stator coil can be energized and heated. <P>SOLUTION: A work piece rocking apparatus includes a rotary table 11 that is rotated around a single axis by a motor 12; a work table 13 that is installed on the rotary table at a slant; a work piece holding unit 15 that is installed on the slanted face of the work table so that it can be freely rotated on a support shaft 14 perpendicularly protruded from the work table, and holds a stator coil 17; and a rail 18 that arrests the rotating motion of the work piece holding unit in the circumferential direction, and permits its turning motion in the direction perpendicular to the direction of the rotation of the rotary table. A stator coil held by the work piece holding unit 15 is rocked in the direction perpendicular to the direction of rotation of the rotary table accompanied by the rotating motion of the rotary table. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a work swinging device for swinging a work such as an electromagnetic coil when filling an electromagnetic coil with varnish, and a varnish impregnation apparatus for a stator coil provided with the work swinging device.

Generally, a stator coil of an electric motor is coated with a varnish in order to insulate the windings of the coils or between the coil and the core and the housing. In addition, by coating the stator coil with varnish, the winding is stably fixed to prevent occurrence of a short circuit due to vibration or the like.
Such coating of the varnish on the stator coil is performed by a varnish coating apparatus as shown in Patent Document 1, for example.
The coating apparatus shown in Patent Document 1 is configured to impregnate the stator coil with varnish from a nozzle disposed above while rotating the stator coil around the axis of the stator coil.
JP-A-6-209548

As described above, the varnish impregnated in the stator coil is cured by heat treatment. However, when a heating method such as indirect heating for heating the atmosphere around the stator coil is used as a varnish curing method, The time required for curing becomes longer.
On the contrary, if the energization heating that directly heats the varnish by energizing the stator coil and causing the stator coil itself to generate heat, efficient heating can be performed and curing of the varnish can be completed in a short time. It becomes.
However, since the coating apparatus described in Patent Document 1 is configured to fill the varnish while rotating the stator coil, a conductive wire for energizing the stator coil is used as the stator coil when energization heating is performed. There is a problem that the coil is twisted by the rotation of the coil, and further, there is a possibility that the wire is broken by the twist.
Therefore, the present invention can fill the entire coil with the varnish without rotating the stator coil about the axis, and can oscillate the workpiece without causing the above-mentioned problems. A moving device and a varnish impregnation processing device for a stator coil are provided.

A workpiece swinging device and a stator coil varnish impregnation processing device that solve the above-described problems have the following characteristics.
That is, as described in claim 1, a rotary table that rotates uniaxially by a drive source, a work table that is attached to the rotary table in an inclined manner, and an inclined surface of the work table that protrudes vertically from the work table. A work holding unit that is rotatably mounted around an axis, and that restricts the rotation operation of the work holding unit in the circumferential direction and the rotation operation in a direction orthogonal to the direction in which the rotary table rotates. The work piece held by the work holding part swings in a direction orthogonal to the rotation direction of the turntable as the turntable rotates.
As a result, when a fluid is dropped from above on a workpiece such as a stator coil, the dropped fluid can be caused to flow in various directions by the swinging operation of the workpiece holding portion, and can be uniformly distributed throughout the workpiece. Is possible.
Further, when a power supply conductor or the like is connected to the workpiece, the workpiece itself does not rotate in the circumferential direction, so that the conductor or the like is not twisted and is not likely to be cut.

According to a second aspect of the present invention, the center of swinging of the work held by the work holding portion is on the rotation axis of the rotary table.
As a result, the workpiece can be swung without moving the position of the workpiece in plan view.

Further, as described in claim 3, a stator coil varnish impregnation processing apparatus provided with the workpiece swinging device, comprising a dropping nozzle that is rotationally driven coaxially with the rotational axis of a rotary table by the drive source, The varnish can be supplied from the dropping nozzle to the stator coil held by the work holding part.
Thereby, when the varnish is dropped from the upper dropping nozzle to the stator coil, the varnish dropped by the swinging operation of the work holding portion can be flowed in various directions on the surface and inside of the stator coil. It is possible to distribute the entire coil uniformly.
Further, since the stator coil itself does not rotate in the circumferential direction, a lead wire or the like for energizing the stator coil is not twisted and there is no fear of cutting.
Therefore, in the curing process after applying the varnish, it is possible to perform highly efficient energization heating in which the stator coil itself generates heat by energizing the stator coil while the stator coil is swung to flow the varnish as a whole. Curing of can be completed in a short time.

According to the present invention, when a fluid is dropped from above on a workpiece such as a stator coil, the dropped fluid can be caused to flow in various directions by the swinging operation of the workpiece holding portion, and the entire workpiece can be uniformly distributed. It becomes possible to spread. Further, when a power supply conductor or the like is connected to the workpiece, the workpiece itself does not rotate in the circumferential direction, so that the conductor or the like is not twisted and is not likely to be cut.
Furthermore, the workpiece can be swung without moving the position of the workpiece in plan view.
In particular, when the work swinging device is applied to a varnish impregnation processing device for a stator coil, the stator coil is energized while the stator coil is swung to flow the varnish as a whole in the curing process after varnish application. High-efficiency energization heating that heats the coil itself can be performed, and the varnish can be cured in a short time.

Next, modes for carrying out the present invention will be described with reference to the accompanying drawings.
A varnish impregnation processing device 1 for a stator coil shown in FIG. 1 is mainly used for a workpiece swing device 2 for swinging a workpiece such as a set stator coil 17 and the workpiece set on the workpiece swing device 2. It is comprised with the nozzle part 3 for dripping a varnish.

The workpiece rocking device 2 is configured as follows.
First, in the workpiece swinging device 2, a rotary table 11 that is rotationally driven by a motor 12 is rotatably attached to a base table 10.
On the turntable 11, a worktable 13 disposed so as to be inclined by an angle θ with respect to the surface of the turntable 11 is fixed so as to be integrally rotatable, and obliquely upward from the worktable 13. The support shaft 14 protrudes.

A work holding part 15 is rotatably attached to the support shaft 14 via a bearing 16, and the work holding part 15 is arranged to be inclined at the same inclination angle θ as that of the work table 13.
In addition, a stator coil 17 that is a workpiece is installed in the workpiece holding portion 15. The stator coil 17 is also set to be inclined at the same inclination angle θ as that of the work table 13.

In the vicinity of the work table 13, an arc-shaped rail 18 is arranged in the vertical direction, and is fixed to the base table 10 by a support table 18a. A work holding portion 15 is connected to the rail 18 by a connecting arm 19.
A bearing is provided on the sliding portion 19 a which is a portion connected to the rail 18 of the connecting arm 19, and the sliding portion 19 a is configured to be slidable along the rail 18.

As the sliding portion 19a slides up and down along the rail 18, the workpiece holding portion 15 is perpendicular to the arc center O of the rail 18 (that is, orthogonal to the direction in which the rotary table 11 rotates). Direction).
On the other hand, as shown in FIG. 2, the work holding unit 15 is connected to the rail 18 by the connecting arm 19, so that the rotation operation in the circumferential direction is restricted and cannot be rotated.

  In the workpiece swinging device 2 configured as described above, when the work table 13 is rotated by the motor 12, the workpiece holding unit 15 rotatably supported by the work table 13 is rotated in the circumferential direction by the rail 18. Since the operation is restricted and it can be rotated up and down along the rail 18, it swings up and down around the arc center O.

This arc center O is located on the rotation center Q of the rotary table 11 (the axis of the rotary shaft 12a of the motor 12) Q.
Thus, by matching the arc center O and the rotation center Q, the stator coil 17 can be swung without moving the position of the stator coil 17 in plan view.

  For example, when the work table 13 is rotated 90 degrees to the left from the state shown in FIG. 1, the stator coil 17 held by the work holding unit 15 is swung without rotating in the circumferential direction as shown in FIG. The point p1 and the point p2 of the stator coil 17 are moved downward, and the point p3 and the point p4 are moved upward.

When further rotated 90 degrees to the left from the state shown in FIG. 3, as shown in FIG. 4, the points p1 and p4 move upward, and the points p2 and p3 move downward.
When further rotated 90 degrees to the left from the state shown in FIG. 4, the points p1 and p2 move upward and the points p3 and p4 move downward as shown in FIG.
When rotating further 90 degrees to the left from the state shown in FIG. 5, point p1 and point p4 move downward, and point p2 and point p3 move upward, resulting in the state shown in FIG.

As described above, when the work table 13 rotates, the rotation operation is converted into the vertical swing operation by the rail 18 and the bearing 16 and transmitted to the work holding unit 15, and the stator coil 17 performs the swing operation. Become.
This oscillating operation is an oscillating operation in which the inclined surface of the stator coil 17 (for example, the inclined surface including the points p1, p2, p3, and p4) rotates.

  By configuring the workpiece rocking device 2 as described above, when a fluid is dropped from above on the workpiece such as the stator coil 17, the fluid dropped by the rocking operation of the workpiece holding unit 15 in various directions. It can be made to flow and can be distributed evenly throughout the workpiece. Further, when a power supply conductor or the like is connected to the workpiece, the workpiece itself does not rotate in the circumferential direction, so that the conductor or the like is not twisted and is not likely to be cut.

Next, the configuration of the nozzle unit 3 will be described.
The nozzle portion 3 is disposed above the workpiece swinging device 2 and is configured by mounting a dropping nozzle 21 on a nozzle base portion 22 fixed to the support plate 20.
One or a plurality of dripping nozzles 21 are mounted (in this example, two are mounted), and are configured to be rotatable about a rotation shaft 23.

A connecting shaft 31 is disposed between the base plate 10 and the support plate 20, a lower end portion of the connecting shaft 31 protrudes below the base plate 10, and an upper end portion protrudes above the support plate 20. .
A roller 31a is fixed to the lower end portion of the connecting shaft 31, a roller 12a is fixed to the rotating shaft 12a of the motor 12, and a belt 32 is wound between the roller 12a and the roller 31a. Yes.
A roller 31b is fixed to the upper end portion of the connecting shaft 31, a roller 23a is fixed to the rotating shaft 23 of the dropping nozzle 21, and a belt 33 is wound between the roller 23a and the roller 31b. It has been turned.

The rotational driving force of the motor 12 is transmitted to the connecting shaft 31 via the belt 32 and further transmitted to the dropping nozzle 21 via the belt 33.
Thereby, the dripping nozzle 21 is rotationally driven by the motor 12 coaxially with the rotating shaft 12a of the motor 12, and rotates in conjunction with the rotary table 11 that is also rotationally driven by the motor 12.

Then, by dropping the varnish while the dropping nozzle 21 is rotating, the rotating coil does not rotate in the circumferential direction (that is, the positions of the points p1, p2, p3, and p4 do not change in plan view). Varnish can be uniformly applied to the head 17a.
In addition, the shorter dropping nozzle 21 in this example is formed to have a length corresponding to the highest position on the upper surface of the coil head 17a, and the longer dropping nozzle 21 is formed on the upper surface of the coil head 17a. Since it is formed in the length matched with the location located in the lowest position, while being able to perform efficient application | coating of a varnish, it is possible to prevent scattering to the circumference | surroundings of a varnish.

By configuring the varnish impregnation treatment apparatus 1 as described above, when the varnish is dropped from the upper dropping nozzle 21 onto the stator coil 17, the varnish dropped by the swing operation of the work holding unit 15 is the stator coil 17. It is possible to flow in various directions on the surface and inside of the stator coil 17, and it is possible to distribute the stator coil 17 uniformly.
Further, since the stator coil 17 itself does not rotate in the circumferential direction, a lead wire or the like for energizing the stator coil 17 is not twisted, and there is no fear of cutting.
Therefore, in the curing process after varnish application, highly efficient energization heating is performed to heat the stator coil 17 by energizing the stator coil 17 while the stator coil 17 is swung and the varnish flows as a whole. It is possible to complete the curing of the varnish in a short time.

It is a side view which shows the varnish impregnation processing apparatus for stator coils provided with the workpiece | work rocking | fluctuation apparatus. It is AA sectional drawing in FIG. It is a side view which shows the varnish impregnation processing apparatus of the state which rotated the turntable 90 degree | times to the left from the state shown in FIG. It is a side view which shows the varnish impregnation processing apparatus of the state which rotated the turntable 90 degree | times to the left from the state shown in FIG. It is a side view which shows the varnish impregnation processing apparatus of the state which rotated the turntable 90 degree | times to the left from the state shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Varnish impregnation processing apparatus 2 Work swinging apparatus 3 Nozzle part 11 Rotary table 12 Motor 13 Work table 14 Support shaft 15 Work holding part 17 Stator coil 18 Rail 19 Connecting arm 21 Dripping nozzle

Claims (3)

A rotary table that rotates uniaxially by a drive source;
A work table attached to the rotary table at an inclination;
A workpiece holding section that is attached to the inclined surface of the work table so as to be rotatable around an axis protruding in the vertical direction from the work table, and holds the workpiece;
A rail that restricts the rotation operation of the work holding portion in the circumferential direction and allows a rotation operation in a direction orthogonal to the direction in which the rotary table rotates,
A work swinging device characterized in that the work held by the work holding part swings in a direction orthogonal to the rotation direction of the rotary table in accordance with the rotating operation of the rotary table.   The workpiece swinging device according to claim 1, wherein the swing center of the workpiece held by the workpiece holding portion exists on the rotation axis of the rotary table. A stator coil varnish impregnation treatment apparatus comprising the workpiece swinging device according to claim 1 or 2,
A drip nozzle that is driven to rotate coaxially with the rotation axis of the rotary table by the drive source;
A varnish impregnation apparatus for a stator coil, characterized in that a varnish can be supplied from a dropping nozzle to a stator coil held by a work holding part.

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