JP2002343528A - Caulking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently connect the end part of a stator coil of a motor. SOLUTION: A wire end part of a cassette coil 4 composing a stator coil of a motor is connected by a sleeve terminal 2. The sleeve terminal 2 is clamped in radial direction by a plate 7 and a guide ring 8 from inside and out side. By the above, the sleeve terminal 2 is positioned. The cassette coil 4 is held down by a guide 9 at its inside to prevent it from moving inside. Further, the caulking is made easy by clamping a three-phase terminal by a fixing jig 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an end portion of two adjacent cables in a cassette coil of a stator in which a plurality of cassette coils are arranged in a donut shape. The present invention relates to a sleeve terminal crimping device for crimping and fixing a three-phase terminal of a coil and a sleeve terminal fitted with a pair of lead ends extending in the direction.

[0002]

2. Description of the Related Art Conventionally, three-phase motors have been widely used. In this three-phase motor, a plurality of cassette coils are usually inserted and fixed in a stator frame assembly to form a three-phase stator coil. For this reason, a plurality of cassette coils must be electrically connected so as to form three-phase stator coils. In the normal case, the ends of the adjacent cassette coils are connected to each other, and the ends of the three-phase coils are taken out.

[0003] The coils are connected to each other by passing both ends through sleeve terminals and caulking the sleeve terminals. A connection terminal with a round hole is attached to the tip of the three-phase terminal for connection with a bolt.

[0004] A cable end (lead wire) used for a coil is usually coated with an insulating coating such as an enamel coating. It is inefficient to remove this insulating coating by hand, and current caulking is often used. In this energization caulking, energization is applied to the terminal to cause the terminal to generate heat, thereby dissolving and removing an insulator such as an enamel inside, and performing caulking. The work is made more efficient by this electric caulking.

[0005]

In such an energization caulking, the caulking is performed by moving an electrode toward a terminal and energizing a pair of electrodes from both sides of the terminal in a state of contact. However, positioning of each terminal is difficult due to variations in the manufacturing accuracy of the cassette coil and the frame assembly and a margin in the radial direction between the terminal and the lead wire. That is, if there are a large number of cassette coils, terminals to be caulked are fitted into their connection portions, but their positions are shifted to some extent in the radial direction and the circumferential direction.

[0006] If the positions of the terminals are shifted, the entire terminals cannot be crimped uniformly, and a crimping failure occurs.

Therefore, conventionally, the position of the terminal, which is the object to be swaged, and the position of the electrode are visually confirmed, and a person moves the stator to perform positioning. Therefore, there is a problem that the workability is poor and the productivity is reduced.

Further, there are a large number of cassette coils and a large number of sleeve terminals to be caulked. On the other hand, it is more efficient to perform caulking after setting all the sleeve terminals. However, there is also a problem in that one sleeve terminal is displaced while being caulked or when the stator is manually moved because the other sleeve terminal is not fixed.

Further, the three-phase terminal has a round hole for bolting, and it is desired to maintain the terminal surface in a horizontal direction. But,
The swaged portion was cylindrical, and it was difficult to adjust the position in the rotation direction.

Furthermore, the cassette coil before the swaging of the sleeve terminal is not directly or indirectly fixed to the stator assembly. For this reason, when caulking is performed, the cassette coil is returned to the inside of the stator due to external force or vibration of a wire or the like at the time of electrode contact and pressurization, and the coil is likely to protrude beyond the inner diameter of the stator. In this case, there is a problem that the thickness of the mold becomes thinner when the stator is finally resin-molded.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a caulking device capable of performing efficient caulking on a sleeve terminal and a three-phase terminal.

[0012]

SUMMARY OF THE INVENTION The present invention relates to an end portion of two adjacent cables in a cassette coil of a stator in which a plurality of cassette coils are arranged in a donut shape, the cable ends after projecting above the cassette coil. A crimping device for a sleeve terminal for caulking and fixing a sleeve terminal in which a pair of lead ends extending outward are fitted, comprising a mounting mechanism for mounting a stator and at least a part of a disk,
The outer periphery has a positioning plate that defines an inner reference position of the sleeve terminal, and a rotation mechanism that relatively rotates the stator and the positioning plate, and moves the sleeve terminal along the outer periphery of the positioning plate. Thereby, the radial position of the sleeve terminal is determined.

In this manner, the positioning plate defines the inner position of the sleeve terminal.
No need to tweak.

The present invention is also directed to an end portion of two adjacent cables in a cassette coil of a stator in which a plurality of cassette coils are arranged in a donut shape. A crimping device for a sleeve terminal for caulking and fixing a sleeve terminal in which a pair of extending lead ends are fitted, wherein a mounting mechanism for mounting a stator, and an upper part of the donut-shaped stator,
A fall prevention ring provided so as to be in contact with the outer peripheral side of the sleeve, and a rotation mechanism for relatively rotating the stator and the fall prevention ring, wherein the outward movement of the sleeve terminal is prevented by the fall prevention ring. The restriction by the ring prevents the fitted sleeve from falling off from the lead end.

By providing the fall prevention ring in this manner, it is possible to prevent the sleeve terminal from coming off outward.

Further, the present invention provides an end portion of two adjacent cables in a cassette coil of a stator in which a plurality of cassette coils are arranged in a donut shape. A sleeve terminal caulking device for caulking and fixing a sleeve terminal in which a pair of extending lead ends are fitted, the mounting mechanism for mounting a stator, and the stator mounting mechanism,
A coil fixing guide provided so as to be in contact with the inner surface side of the cassette coil, wherein when the stator is mounted on the mounting mechanism, the cassette coil is pressed outward by the coil fixing guide. I do.

As described above, by providing the coil fixing guide, it is possible to prevent the cassette coil from moving to the side without the coil.

Further, the present invention provides a three-phase coil having a plurality of cassette coils arranged in a donut shape, which is divided into three-phase coils. A caulking device for caulking and fixing to a three-phase terminal with a round hole at an end protruding toward the three-phase terminal. It has a fixing mechanism for fixing and holding the hole portion.

As described above, by providing the fixing mechanism for holding the three-phase terminal, the surface direction of the three-phase terminal is regulated,
It can be caulked at an appropriate position.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of a caulking device according to one embodiment. The fixed base 15 is fixed to a gantry mounted and fixed on the floor. A fixed shaft 15 a is provided at the center of the fixed base 15, and a stator mounting base 30 a is rotatably mounted around the fixed shaft 15 a via a bearing 32. The bearing part 32 includes the fixed base 1
5, the lower cylindrical portion 30a of the stator mount 30 is fixed to the fixed shaft 15a.
It can rotate smoothly around a. A pulley 34 is attached to a lower portion of the lower cylindrical portion 30a of the stator, and a belt is hung on the pulley 34, and the belt is moved by a motor (not shown).
The stator mount 30 is rotated.

The stator mount 30 has a disk-shaped portion 3
0b, and a plurality of fixing pins 30c extending upward are provided on the outer peripheral portion. The fixing pin 30c is fixed to a fixing hole 1 provided in the outer peripheral portion of the stator 1.
a. That is, by moving the stator 1 from above toward the stator mount 30, the fixing pins 30c enter the fixing holes 1a, thereby
Are fixed to the stator mount 30. The stator 1 has a configuration in which a plurality of cassette coils 4 are arranged in a cylindrical shape inside the stator.

As shown in FIG. 2, the upper portion of the stator mounting base 30 extends outward, and a portion corresponding to the inner peripheral side of each cassette coil 4 contacts a part of the inner peripheral side of the cassette coil 4. Guide 9 is provided. That is, the guide 9 is a member that extends outward from the central portion of the stator mounting base 30,
And the inner peripheral position of the cassette coil 4 is set as a reference position. Note that, in this example, the guide 9 is formed of a plurality of pests that contact both ends of the cassette coil 4. Therefore, when the stator 1 is lowered from above and mounted on the stator mounting base 30, the inner surfaces of both ends of each cassette coil 4 in the circumferential direction are suppressed by the guide 9, and the inner peripheral position is positioned at the reference position.
The guide 9 can be appropriately shaped as long as the guide 9 can contact the inner peripheral side of the cassette coil 4 and position the inner peripheral surface of the cassette coil 4 at the reference position.

Each cassette coil 4 is constituted by a coil wound with an enamel-coated wire, and both ends of the wire protrude upward and thereafter extend outward. Then, the wire ends of the two adjacent cassette coils 4 (one end connected in series) are inserted into one sleeve terminal 2, and an electric current is applied to the sleeve terminal 2 to perform energization caulking to melt the enamel coating. The two lead wires are connected, and the two cassette coils 4 are electrically connected.

As a result, a circuit as shown in FIG. 3 is obtained as an equivalent circuit. That is, all the cassette coils are connected in series, and the three points are divided into U, V, and W.
By supplying currents having a phase shift of 120 ° to the three-phase terminals, a predetermined rotating magnetic field can be formed in the stator coil.

In FIG. 1, the fixed electrode 6 is located below the sleeve terminal 2 from the right side to be swaged, and the movable electrode is located above the sleeve terminal 2. 5 The movable electrode 5 is movable up and down in the vertical direction in the figure.

When performing the electric caulking, first, the stator 1 is moved in the left-right direction in the figure (in this case, rightward), and the fixed electrode 6 is positioned immediately below the sleeve terminal 2. Next, the movable electrode 5 is lowered, and the sleeve 2 is sandwiched between the fixed electrode 6 and the sleeve 2 and pressed. Then, by passing a large current between the movable electrode 5 and the fixed electrode 6, the enamel coated on the lead wire in the sleeve terminal 2 is removed and the pair of lead wire ends in the sleeve terminal 2 are welded and crimped. .

A disk-shaped plate 7 as a whole is fixed to the fixed shaft 15a. This plate 7
It is a member that determines a reference position on the inner peripheral side of the sleeve terminal 2, and determines an inner position where the sleeve terminal 2 is mounted when the stator 1 is fixed to the stator mount 30.

A fixed shaft 32 is provided above the stator 1.
A fall prevention ring 8 having a central portion fixed thereto is disposed. As shown in FIGS. 1 and 4, the fall prevention ring 8 has a disk shape as a whole, but has a ring portion 8a extending downward around its periphery. This ring part 8
a is set so as to be located slightly outside the outer peripheral end of the sleeve terminal 2.

After the stator 1 is mounted on the stator mounting base 30, the sleeve terminals 2 are fitted to a pair of wire ends of the cassette coil 4 (or the sleeve terminals 2 may be mounted beforehand). Then, the fall prevention ring 8 is lowered from above and fixed to the upper end portion of the fixed shaft 32. Thus, the ring portion 8a of the fall prevention ring 8 is located on the outer peripheral side of each sleeve terminal 2. Therefore, even if each sleeve terminal 2 tries to move outward, the movement is suppressed by the inner surface of the ring portion 8a of the fall prevention ring 8, and the sleeve terminal 2 does not fall off the wire end.

The fall prevention ring 8 has a disk shape as a whole. However, if the outside of the sleeve terminal 2 is completely surrounded, the above-mentioned fixed electrode 6 cannot enter from outside. Therefore, an opening 17 is provided in a part of the fall prevention ring 8. Therefore, the fixed electrode 6 can enter the lower side of the sleeve terminal 2 from the opening 17. The upper part of the fall prevention ring 8 corresponding to the opening 17 is also removed. Therefore, at the swaging position where the fixed electrode 6 is inserted below the sleeve terminal 2, the sleeve terminal 2 is visible from above, and the movable electrode 5 can swage the sleeve terminal 2.

Further, around the portion corresponding to the opening 17 of the fall prevention ring 8, an arc-shaped opening 8 is formed in the disk portion.
b is formed. In the illustrated example, the opening 8b is formed as shown in FIG.
As shown in the figure, four are provided, and the state of the sleeve terminal 2 can be monitored from the opening 8b.

Further, the position of the opening 17 of the fall prevention ring 8 in front of the stator 1 (in FIG.
Is clockwise, a positioning member 8c is provided above the opening 17 located at 15 ° to the right. The positioning member 8c is for setting the outer peripheral end of the sleeve terminal 2 to a reference position, and for the portion closest to the opening 17, the inner peripheral position of the positioning member 8c is set to the reference position.

That is, as shown in FIG. 5, the inner periphery of the ring portion 8a of the fall prevention ring 8 is located at a position where the sleeve terminal 2 does not come off, and is located slightly outside the reference position of the sleeve terminal 2. ing. When the stator 1 rotates and the sleeve terminal 2 approaches the opening 17 of the fall prevention ring 8, the sleeve terminal 2 is moved to the positioning member 8c.
Contact inside. Therefore, the outer peripheral side position of the sleeve terminal 2 is defined by the positioning member 8c.

That is, as shown in FIG. 5, the inner position of the sleeve terminal 2 is determined by the plate 7, and the outer position is defined by the positioning member 8c. Thus, the radial position of the sleeve terminal 2 is determined. As shown in FIG. 6, the distance between the outer periphery of the plate 7 on the start end side (upper part in the drawing) of the opening 8b of the fall prevention ring 8 and the ring portion 8a of the fall prevention ring 8 is a + α.
In the end side (the crimping position at the lower part in the figure), that is, the distance between the plate 7 and the positioning member 8c is a. By adjusting the distance a to the length of the sleeve terminal 2 in the circumferential direction, the sleeve terminal 2 can be reliably positioned.

FIG. 7 shows the fixed electrode 6 and the movable electrode 5.
Indicates a state in which the sleeve terminal 2 is sandwiched and caulked. When caulking is performed,
As can be seen from FIG. 6, the sleeve terminal 2 is not in contact with the positioning member 8c.

FIG. 8 is a diagram showing a state in which caulking is performed. In this way, the sleeve terminal 2 is sandwiched between the movable electrode 5 and the fixed electrode 6 from above and below, and caulking is performed. The ends of the wires 12a and 12b of the adjacent cassette coil 4 are inserted into the sleeve terminal 2, and these are connected by caulking.

Further, as shown in an equivalent circuit of FIG. 9, the coil of the stator 1 is formed as a three-phase coil as a whole, and the terminals of the U, V, and W phases are connected to three-phase coils for external connection. The terminal 3 is formed. These three-phase terminals 3
Has a circular terminal portion 3a having a round hole and a cylindrical base portion 3b for connection with a terminal for connection to each phase cable from another inverter. A wire is inserted and fixed in the base 3b, a bolt is inserted in the round hole, and the surrounding donut-shaped terminal 3a is brought into contact with another terminal with the bolt to perform connection.

Here, such a three-phase terminal 3 having a round hole is connected to an end of the three-phase wire by caulking. For this purpose, the wire ends extend outward from the outer peripheral portion of the stator 1 as shown in FIG.

Then, the three-phase terminals 3 are inserted into these three wire ends, respectively, and thereafter, current is caulked.
For this purpose, a fixing jig 10 is provided. The fixing jig 10 is fixed to a stator mounting base 30b, and is movable up and down. As shown in FIGS. 9 to 11, the fixing jig 10 has a clothespin configuration, and a pair of scissors members is urged in a closing direction about a support shaft by a spring 23. ing.

That is, the upper end 10a of the fixing jig 10
Corresponds to the tip of the clothespin and, as shown in FIG. 12, sandwiches the periphery of the round hole terminal portion of the three-phase terminal 3 here. At the tip 10 a of the clothespin of the fixed jig 10, a concave portion 18 that sandwiches the periphery of the disk-shaped terminal portion 3 a around the round hole of the three-phase terminal 3 is provided. By fixing the terminal portion 3a around the hole, the three-phase terminal 3 is horizontally supported. Further, since the position where the fixed jig 10 grips the three-phase terminal 3 is predetermined, the position of the three-phase terminal 3 is determined by fixing the three-phase terminal 3 by the fixed jig 10.

Thus, the three-phase terminal 3 is fixed to the fixed jig 1
Held by 0. In this state, the fixed electrode 6 is inserted into the lower side of the three-phase terminal 3 from outside, and the movable electrode 5 is lowered from above, so that the cylindrical base 3b of the three-phase terminal 3 is connected to the fixed electrode 6. The movable electrode 5 can be sandwiched, and by moving the two so as to be close to each other, it is possible to perform the electric caulking.

Here, the fixing jig 10 is provided in accordance with the three three-phase terminals 3 and holds all three three-phase terminals 3 when holding. Also, this fixing jig 10
Is a three-phase terminal 3
When the caulking is not performed (when the sleeve terminal 2 is caulked), it can be compared with a position that does not hinder the work (downward), and there is no problem.

Further, as shown in FIGS. 12 and 13,
The inner surface of the upper end portion 10a of the fixing jig 10 has an arc shape as a whole. Therefore, by moving the fixed jig 10 upward, the peripheral portion of the terminal portion 3b of the three-phase terminal 3 comes into contact with the fixed jig 10 and the tip portion 10a is automatically opened. Terminal 3 around the hole
When "a" matches, it is automatically inserted. In addition, the constraint is released by moving downward. Therefore, the driving of the fixed jig 10 itself only needs to be moved in the vertical direction, and the driving mechanism can be simplified. That is, it is possible to position the three-phase terminal 3 only by holding the three-phase terminal 3 by hand and pushing up the fixing jig 10 with a small load upward, and holding the three-phase terminal 3 by hand. 1
The set state of the three-phase terminal 3 can be released only by moving 0 downward. The fixing jig 10 can be locked at a predetermined position using a pin. Further, the fixed jig 10 may be moved by a motor or the like.

The overall operation is as follows.
Is mounted on the stator mounting base 30. In this case, the three-phase terminal 3 is located above the fixing jig 10.
Note that the fixed jig 10 may not be rotated.
The fixing jig 10 has three clothespins corresponding to the three three-phase terminals 3.

The wire 12 of the cassette coil 4
The sleeve terminals 2 are fitted into the ends of the terminals a and 12b. The sleeve terminal 2 may be fitted before that. Next, the fall prevention ring 8 is covered from above. Then, the stator mounting base 30 is rotated, and the sleeve terminal 2 is moved by the motor so as to be at the positions of the fixed electrode 6 and the movable electrode 5.
Then, the fixed electrode 6 is moved below the sleeve terminal 2, and the movable electrode 5 is lowered to perform electric caulking. Then, the stator mounting base 30 is rotated, and the sleeve terminals 2 are sequentially caulked. When the caulking of the sleeve terminal 2 is completed, the fixed electrode 6 is moved below one three-phase terminal 3 while the three-phase terminal 3 is fixed by the fixing jig 10, and the movable electrode 5 is lowered. Perform electric caulking.
The position of the three-phase terminal 3 is changed for the other two terminals, and the energization is similarly performed. In this case, as the operation, the stator 1 is retracted, the terminal is rotated to the next terminal, and the stator 1 is advanced, in this order, the indexing is automatically performed to the next swaging position.

As described above, when the energization caulking is completed for each terminal, the stator 1 is removed and the caulking is completed. As described above, with the apparatus of the present embodiment, the caulking operation itself can be performed fully automatically, and the efficiency of the operation can be improved.

[0048]

As described above, according to the present invention,
Since the inside position of the sleeve terminal is defined by the positioning plate, it is not necessary to finely adjust the position manually.

Further, by providing the fall prevention ring, it is possible to prevent the sleeve terminal from coming off outward.

By providing the coil fixing guide, it is possible to prevent the cassette coil from moving inward.

Further, by providing a fixing mechanism for holding the three-phase terminal, the surface direction of the three-phase terminal can be regulated and caulking can be performed at an appropriate position.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an embodiment.

FIG. 2 is a view showing a configuration of a guide member 9;

FIG. 3 is a diagram showing an equivalent circuit of a stator coil.

FIG. 4 is a view showing a configuration of a fall prevention ring 8;

FIG. 5 is a diagram showing a configuration for positioning a sleeve terminal 2 in a circumferential direction.

FIG. 6 is a diagram showing a configuration for positioning a sleeve terminal 2 in a circumferential direction.

FIG. 7 is a view showing a crimping state.

FIG. 8 is a view showing a crimped state.

FIG. 9 is a diagram showing an operation of a fixing jig 10 of a three-phase terminal.

FIG. 10 is a diagram showing an operation of a fixing jig 10 of a three-phase terminal.

FIG. 11 is a view showing the operation of a fixing jig 10 of a three-phase terminal.

FIG. 12 is a view showing an operation of a fixing jig 10 of a three-phase terminal.

FIG. 13 is a view showing the operation of the fixing jig 10 of the three-phase terminal.

[Explanation of symbols]

1 stator, 2 sleeve terminal, 3 three-phase terminal, 4
Cassette coil, 5 movable electrode, 6 fixed electrode, 7 plate, 8 fall prevention ring, 9 guide, 10 fixed jig, 15 fixed base, 30 stator mounting base.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiro Kiyokawa 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Kazuhiro Watanabe 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation F term (reference) 5E063 CB11 CC04 XA01 5H604 AA05 AA08 BB01 CC01 QB03 QB14 5H615 AA01 BB01 PP01 PP14 PP15 QQ02 SS15

Claims (4)

[Claims] An end of two adjacent cables in a cassette coil of a stator in which a plurality of cassette coils are arranged in a donut shape, a pair of leads extending outwardly after projecting above the cassette coil. What is claimed is: 1. A crimping device for a sleeve terminal for caulking and fixing a sleeve terminal having an end fitted therein, comprising: a mounting mechanism for mounting a stator; A rotating mechanism that relatively rotates the stator and the positioning plate; and a swaging that determines a radial position of the sleeve terminal by moving the sleeve terminal along an outer periphery of the positioning plate. apparatus. 2. A pair of leads, which are ends of two adjacent cables in a cassette coil of a stator in which a plurality of cassette coils are arranged in a donut shape and protrude above the cassette coil and then extend outward. What is claimed is: 1. A crimping device for a sleeve terminal for caulking and fixing a sleeve terminal having an end fitted therein, comprising: a mounting mechanism for mounting a stator; And a rotation mechanism for relatively rotating the stator and the fall prevention ring, and wherein the outward movement of the sleeve terminal is regulated by the fall prevention ring, so that the fitted sleeve has a lead end. A caulking device that prevents it from falling off. 3. A pair of leads, which are ends of two adjacent cables in a cassette coil of a stator in which a plurality of cassette coils are arranged in a donut shape, protruding above the cassette coil and then extending outward. What is claimed is: 1. A sleeve terminal caulking device for caulking and fixing a sleeve terminal having an end fitted therein, comprising: a mounting mechanism for mounting a stator; A caulking device, comprising: a guide; and pressing the cassette coil outward by a coil fixing guide when the stator is mounted on the mounting mechanism. 4. A stator coil in which a plurality of cassette coils are arranged in a donut shape is divided into three-phase coils, which are ends of a three-phase cable, which protrudes outward from the stator. A caulking device for caulking and fixing to a three-phase terminal having a round hole at an end, wherein the caulking device is movable back and forth from below the three-phase terminal to a position of the three-phase terminal, and fixes a round hole part of the three-phase terminal. A caulking device having a fixing mechanism for holding.