JP3704858B2 - Armature coil assembling apparatus and assembling method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an armature coil assembling apparatus used for a starter armature or the like and an assembling method thereof.
[0002]
[Prior art]
As a prior art, there is a “method for manufacturing a rotor of a rotating electrical machine” described in Japanese Patent Application No. 7-326983. As shown in FIG. 10, the rotor described in this prior application has a lower layer coil divided body 5 and an upper layer coil divided body 6 provided in a substantially U-shape, respectively, and the coils of the coil divided bodies 5 and 6 are arranged. Coil end portions 5b, 5c and 6b, 6c forming end portions (portions protruding from the slot 3a of the armature core 3) are respectively formed on the armature core 3 from both ends of the coil pieces 5a, 6a inserted into the slot 3a. It has a predetermined inclination with respect to a straight line (diameter) that extends to the inner peripheral side substantially parallel to the axial end face and passes through the axis of the rotating shaft 4 on a plane orthogonal to the rotating shaft 4.
The coil divided bodies 5 and 6 are held in parallel with the slot 3a by a jig arranged on the outer periphery of the armature core 3 (so that the coil pieces 5a and 6a inserted into the slot 3a are parallel to the slot 3a). Then, the jig is inserted into the slot 3a by moving the jig toward the radially inner side with respect to the armature core 3.
[0003]
[Problems to be solved by the invention]
In the above prior application, in order to hold the coil divided bodies 5 and 6 so that the coil pieces 5a and 6a are parallel to the slot 3a, it is desirable to directly hold the coil pieces 5a and 6a. However, when the coil pieces 5a and 6a are gripped, the jig (the part holding the coil pieces 5a and 6a) is moved to the armature core 3 when the jig is moved to the armature core 3 side (radially inner peripheral side). The coil pieces 5a and 6a cannot be inserted into the slot 3a. Therefore, in order to hold the coil divided bodies 5 and 6 so that the coil pieces 5a and 6a are parallel to the slot 3a, it is necessary to grip the coil end portions 5b and 5c and 6b and 6c that go out of the slot 3a. is there. However, since the coil end portions 5b, 5c and 6b, 6c have a small chuck area, the coil segments 5a, 6a are held in parallel with the slot 3a by gripping the coil end portions 5b, 5c, 6b, 6c. 5 and 6 are difficult to hold, and the coil split bodies 5 and 6 are likely to be displaced with respect to the slot 3a, so that the coil pieces 5a and 6a may not be inserted into the slot 3a.
The present invention has been made based on the above circumstances, and an object of the present invention is to provide an assembly device for an armature coil that can be reliably assembled to an armature core without the positional deviation of the coil divided body with respect to the slot, and It is to provide an assembling method.
[0004]
[Means for Solving the Problems]
(Means of Claim 1)
According to the first aspect of the present invention, the coil holding means in which the coil divided body is set in the opening and the coil divided body set in the opening are pushed in from the radially outer side of the opening to insert the coil piece into the slot. Coil insertion means. As a result, it is not necessary to insert the coil piece into the slot while holding the coil end, so that the position of the coil divided body relative to the slot can be eliminated, and the coil divided body can be securely assembled to the armature core. it can.
[0005]
According to the means of claim 2, the coil holding means includes holding means for holding the coil divided body set in the opening. As a result, the coil divided body inserted into the opening can be held in an appropriate posture (an posture in which the coil can be inserted into the slot), so that poor insertion into the slot can be eliminated.
[0006]
According to the third aspect of the present invention, the opening is formed in accordance with the shape of the coil divided body so that the assembly direction of the coil divided body can be specified with respect to the armature core. Thereby, since it can prevent that a coil division body is set to an opening part in the reverse direction, a coil division body can be assembled | attached correctly with respect to an armature core.
[0007]
According to the fourth aspect of the present invention, the coil holding means has the same number of openings as the slots in the circumferential direction, and the coil insertion means includes the same number of coil insertion arrows as the openings in the circumferential direction. Yes. As a result, the same number of coil divisions as the slots can be inserted into the slots at a time and assembled to the armature core.
[0008]
According to the means of claim 5, the coil divided body is set in the opening of the coil holding means, and the positions of the slot of the armature core, the opening of the coil holding means, and the coil insertion arrow are aligned, and then the opening is opened. The coil divided body set in the portion is pushed from the outside in the radial direction by a coil insertion arrow, and the coil piece is inserted into the slot. In this method, since it is not necessary to insert the coil piece into the slot while holding the coil divided body, the position of the coil divided body relative to the slot can be eliminated, and the coil divided body is securely assembled to the armature core. Can do.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, an armature coil assembling apparatus and an assembling method thereof according to the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view of an armature coil assembling apparatus.
The assembling apparatus 1 of this embodiment is an apparatus for assembling an armature coil (described below) to an armature core 3 used for an armature 2 of a starter as shown in FIG.
The armature core 3 is formed by laminating a plurality of thin steel plates punched into a disk shape by a press machine, and is fitted and fixed to a serration 4 a formed on the outer periphery of the rotary shaft 4. A predetermined number (for example, 25) of slots 3a for mounting armature coils are provided on the outer periphery of the armature core 3.
[0010]
The armature coil includes a lower coil division body 5 and an upper coil division body 6 each made of a material having excellent conductivity (for example, copper), and both the coil division bodies 5 and 6 have the same number as the number of slots 3a ( 25) are prepared.
The lower layer coil divided body 5 has a coil piece 5a inserted into the slot 3a via an insulator (not shown), and an inner circumference substantially parallel to the axial end face of the armature core 3 from both ends of the coil piece 5a. A pair of coil end portions 5b and 5c extending to the side, and a coil joint portion 5d bent in the axial direction from the inner peripheral end of the coil end portions 5b and 5c. However, each of the pair of coil end portions 5b and 5c has a predetermined inclination with respect to a straight line (diameter) connecting the coil piece 5a and the shaft center on a plane orthogonal to the rotation shaft 4, and is viewed from the axial direction. Sometimes one coil end 5b and the other coil end 5c are inclined to the opposite sides (see FIG. 11).
[0011]
The upper-layer coil divided body 6 includes a coil piece 6a inserted through an insulator (not shown) above the coil piece 5a previously inserted into the slot 3a, and armatures from both ends of the coil piece 6a. It comprises a pair of coil end portions 6b, 6c extending inwardly in parallel with the axial end surface of the iron core 3, and a coil joint portion 6d bent in the axial direction from the inner peripheral end of the coil end portion 6b. However, each of the pair of coil end portions 6b and 6c has a predetermined inclination with respect to a straight line (diameter) connecting the coil piece 6a and the shaft center on a plane orthogonal to the rotation shaft 4, and is viewed from the axial direction. Sometimes one coil end 6b and the other coil end 6c are inclined to the opposite sides (see FIG. 11).
[0012]
As shown in FIG. 11, in this armature coil, the coil joint portions 5d and 6d of the lower layer coil divided body 5 and the upper layer coil divided body 6 in which the coil piece 5a and the coil piece 6a are inserted in different slots 3a are connected to each other. They are joined by welding or the like and are electrically connected.
Ring-shaped insulating plates 7 and 8 are provided between the coil ends 5b and 5c and the axial end surface of the armature core 3, and between the coil ends 5b and 5c and the coil ends 6b and 6c, respectively. (See FIG. 10).
[0013]
Next, the assembly apparatus 1 for the armature coils (the lower layer coil division body 5 and the upper layer coil division body 6) will be described.
As shown in FIG. 1, the assembly apparatus 1 includes a coil holder 9 and a coil insertion machine 10.
(Description of coil holder 9)
As shown in FIGS. 3 to 5, the coil holder 9 includes a plurality (the same number as the slots 3 a) of coil holding blocks 11 arranged at constant intervals in the circumferential direction, and upper end surfaces of the coil holding blocks 11. The upper plate 13 is fixed to the lower end surface of each coil holding block 11 with a bolt 14 or the like.
[0014]
Each coil holding block 11 is arranged near the outer periphery of the top plate 13 and the bottom plate 15 so that the hollow portion 16 (see FIG. 3) is formed on the inner periphery. In addition, a predetermined number (the same number as the slots 3a) of openings 17 leading to the hollow portions 16 are provided between the coil holding blocks 11 adjacent in the circumferential direction. The opening 17 is a space for setting the lower layer coil divided body 5 or the upper layer coil divided body 6 (hereinafter, described as the coil divided body 5). As shown in the enlarged view of FIG. A coil piece insertion portion 17a into which the coil piece 5a is inserted, an upper coil end insertion portion 17b into which one coil end portion 5b is inserted, and a lower coil end insertion into which the other coil end portion 5c is inserted. Part 17c.
[0015]
The dimensional relationship between the opening 17 and the coil divided body 5 is as follows.
The circumferential width A1 of the coil piece insertion portion 17a is set slightly larger than the width B1 (see FIG. 7) of the coil piece 5a, and the axial dimension A2 of the coil piece insertion portion 17a is between the coil end portions 5b and 6c. It is set slightly smaller than the dimension B2 of the coil piece 5a. Further, the circumferential width A3 of the upper coil end insertion portion 17b is set slightly larger than the circumferential dimension B3 (see FIG. 7) of one coil end portion 5b, and the circumferential width of the lower coil end insertion portion 17c. A4 is set slightly larger than the circumferential dimension B4 (see FIG. 7) of the other coil end 5c. However, since the circumferential dimension B3 of one coil end 5b and the circumferential dimension B4 of the other coil end 5c are different (B3 <B4), the circumferential width A3 of the upper coil end insertion portion 17b is one side. It is set to be larger than the circumferential dimension B3 of the other coil end 5b and smaller than the circumferential dimension B4 of the other coil end 5c. Thereby, it can prevent that the coil division body 5 is inserted in reverse direction. It should be noted that the circumferential dimension B3 of one coil end 5b and the circumferential dimension B4 of the other coil end 5c are different from each other as shown in FIG. 8 with respect to the coil piece 5a. This is because the inclination and the length of the coil end 5c are different from each other. Therefore, since each coil divided body 5 needs to be assembled in the same direction with respect to the armature core 3, it is necessary to insert the coil divided bodies 5 in the opening 17 of the coil holder 9 in the same direction.
[0016]
A positioning projection 18 for aligning the position of the opening 17 and the slot 3a of the armature core 3 is fixed to the inner peripheral end of each coil holding block 11 by brazing or the like (see FIG. 3). As shown in FIG. 9, this positioning protrusion 18 is V-shaped provided on the outer peripheral surface of the armature core 3 with respect to the armature core 3 disposed on the inner periphery (hollow portion 16) of the coil holder 9. The circumferential positions of the opening 17 and the slot 3a can be matched by being fitted in the groove 3b. The V-shaped groove 3b is formed by a pair of protrusions 3c provided adjacent to the opening 17 of the slot 3a. Further, the pair of protrusions 3c are inserted into the slot 3a and then bent toward the slot 3a to close the opening 17 of the slot 3a, thereby closing the coil piece 5a and the coil piece 6a. It prevents popping out.
[0017]
As shown in FIG. 3, the upper plate 13 includes a spring 19 and a coil stopper 20 that is biased toward the coil holding block 11 by the spring 19. The coil stopper 20 receives the biasing force of the spring 19 and holds the coil divided body 5 at a predetermined position in the opening 17 by pressing the coil divided body 5 inserted into the opening 17. Note that the number of springs 19 and coil stoppers 20 corresponding to the number of openings 17 (the same number as the slots 3a) are provided. Further, a round hole 13 a that communicates with the hollow portion 16 formed by the coil holding block 11 is provided in the central portion of the upper plate 13. The round hole 13a is provided to attach the coil holder 9 in which the coil divided body 5 is set to the coil insertion machine 10 and then attach the coil holder 9 to the coil insertion machine 10 through the armature core 3 on the inner periphery of the coil holder 9. It has been.
The bottom plate 15 is provided with a centering hole 15a for setting the coil holder 9 in the coil insertion machine 10 and a positioning hole 15b for positioning with respect to the coil insertion machine 10 (see FIG. 3).
[0018]
(Description of the coil insertion machine 10)
As shown in FIG. 1, the coil insertion machine 10 includes a frame 21 for setting the coil holder 9, a cylinder 23 provided at the center of the base 22 of the coil insertion machine 10, and the cylinder 23. A disc 25 fixed to the tip of the piston rod 24, a predetermined number of levers 26 connected to the disc 25, and a predetermined number of coil insertion arrows 27 linked to the vertical movement of the disc 25 via the lever 26. Etc.
[0019]
The frame body 21 is provided in a substantially cylindrical shape and is fixed on the base 22 with bolts 28. A concave portion 21a for setting the coil holder 9 is provided on the upper portion of the frame body 21, and a centering protrusion 29 for centering with the coil holder 9 is fixed to the center of the bottom surface of the concave portion 21a. A shaft fitting hole 29 a into which the rotating shaft 4 of the armature core 3 is fitted is formed at the center of the centering protrusion 29. A positioning pin 30 that fits into a positioning hole 15b provided in the bottom plate 15 of the coil holder 9 is attached to the outer peripheral side of the centering protrusion 29 on the bottom surface of the recess 21a.
The cylinder 23 can move the piston rod 24 up and down by pressure operation of an air switching valve (not shown).
The circular plate 25 is provided with a plurality of guide holes 25a on the outer peripheral portion, and the guide pins 31 are fitted in the respective guide holes 25a. The guide pin 31 is disposed on the outer periphery of the cylinder 23, is fixed by a bolt 32 in an upright posture on the base 22, and an upper end portion is supported by the frame body 21.
[0020]
The lever 26 is formed in a bowl shape (substantially L-shaped) and is rotatably attached to a lever holder 33 fixed to the outer periphery of the frame body 21 through a pin 34. One end side of the lever 26 is provided with a distal end portion 26 a having an R shape, and is slidably fitted into an outer peripheral groove 25 b formed on the outer peripheral surface of the disc 25. On the other end side of the lever 26, a cam follower 35 is fixed to the tip end portion 26 b, and the cam follower 35 is fitted in an oval hole 27 a provided in the coil insertion arrow 27. The lever holder 33 is fixed to the outer periphery of the frame body 21 with a bolt 36 or the like corresponding to each lever 26. The pin 34 is attached to the lever holder 33 with a circlip 37 or the like as shown in FIG.
The coil insertion arrow 27 is formed in a guide groove 40 formed by a groove 21b provided on the wall surface forming the recess 21a of the frame body 21 and an upper plate 39 fixed to the upper end surface of the frame body 21 with a bolt 38 or the like. It is slidably fitted from the outer peripheral side in the radial direction toward the center.
[0021]
Next, the process of assembling the coil divided body 5 to the armature core 3 using the assembly apparatus 1 will be described.
First, the coil divided body 5 is inserted into the opening 17 from the outside in the radial direction of the coil holder 9 and held at a predetermined position by the coil stopper 20. After a predetermined number of coil division bodies 5 are set on the coil holder 9, the coil holder 9 is attached to the coil insertion machine 10. At this time, centering holes 15a provided in the bottom plate 15 of the coil holder 9 are fitted to the centering protrusions 29 provided in the recesses 21a of the frame body 21 to perform centering, and the positioning pins 30 are attached to the bottom plate 15. The coil holder 9 is positioned by being fitted in the positioning hole 15b. Thereby, positioning with the coil insertion arrow 27 and the opening part 17 of the coil holder 9 is performed. That is, the circumferential positions of the coil insertion arrow 27 and the opening 17 coincide.
[0022]
Subsequently, the armature core 3 is attached to the coil insertion machine 10. At this time, the V-shaped groove 3b provided on the outer peripheral surface of the armature core 3 is inserted into the inner periphery of the coil holder 9 along the positioning protrusion 18 of the coil holder 9, and the shaft of the centering protrusion 29 is inserted. The rotary shaft 4 is fitted and set in the fitting hole 29a. Thereby, the positioning of the slot 3a of the armature core 3 and the opening 17 of the coil holder 9 is performed. That is, the circumferential positions of the slot 3a and the opening 17 coincide.
[0023]
After setting the coil holder 9 and the armature core 3 in the coil insertion machine 10, the piston rod 24 is lowered by the pressure operation of the air switching valve. As a result, the disk 25 fixed to the piston rod 24 is lowered, so that the lever 26 connected to the disk 25 rotates from the position indicated by the solid line in FIG. To do. The rotation of the lever 26 causes the coil insertion arrow 27 to be pushed in along the guide groove 40 toward the radially inner side (center direction) via the cam follower 35 fixed to the other end of the lever 26, and the coil holder 9 is entered into the opening 17. As a result, the coil divided body 5 held in the opening 17 is pushed out by the coil insertion arrow 27 and inserted into the slot 3a of the armature core 3 (note that it is actually inserted in the slot 3a is the coil A piece 5a, and the coil end portion is outside the slot 3a). The coil piece 5a inserted into the slot 3a is reliably assembled to the bottom of the slot 3a under the pressure of the cylinder 23.
[0024]
Subsequently, the piston rod 24 is raised by the pressure operation of the air switching valve. As a result, the disc 25 fixed to the piston rod 24 is raised, and the lever 26 connected to the disc 25 rotates from the position indicated by the two-dot chain line in FIG. 1 to the position indicated by the solid line with the pin 34 as a fulcrum. To do. The rotation of the lever 26 causes the coil insertion arrow 27 to be pulled out along the guide groove 40 toward the outer periphery in the radial direction via the cam follower 35 fixed to the other end of the lever 26, so that the stationary position (the position shown in FIG. Return to). Thereafter, the armature core 3 and the coil holder 9 are taken out from the coil insertion machine 10 and one cycle is completed.
Subsequently, when the upper layer coil division body 6 is assembled to the armature core 3, a predetermined number of upper layer coil division bodies 6 are set in the taken out coil holder 9 and attached to the coil insertion machine 10 again. And the armature core 3 is again attached to the coil insertion machine 10, and the process similar to the said cycle is performed.
[0025]
The step of inserting the coil divided body 5 into the opening 17 of the coil holder 9 may be performed manually or automatically. Moreover, the process of attaching / detaching the coil holder 9 and the armature core 3 to / from the coil insertion machine 10 may be performed manually or automatically.
In this embodiment, the coil holder 9 is positioned with respect to the coil insertion machine 10, and the coil holder 9 and the armature core 3 are positioned, so that the slots 3 a of the armature core 3 and the coil holder 9 Although the circumferential direction position of the opening part 17 and the coil insertion arrow 27 of the coil insertion machine 10 is match | combined, you may employ | adopt positioning methods other than this. For example, the coil holder 9 and the armature core 3 may be positioned separately with respect to the coil insertion machine 10. In this case, it is not necessary to position the coil holder 9 and the armature core 3 directly.
[0026]
(Effect of this embodiment)
In the present embodiment, a predetermined number of coil division bodies 5 are set on the coil holder 9 arranged on the outer periphery of the armature core 3, and the coil is divided by the coil insertion arrow 27 from the radially outer side of the coil holder 9. in Succoth pushed out of the body 5, can be inserted coil piece 5a into the slot 3a. As a result, it is not necessary to insert the coil piece 5a into the slot 3a while holding the coil ends 5b and 5c as in the prior application, so that it is possible to eliminate the positional deviation of the coil divided body 5 with respect to the slot 3a. The coil divided body 5 can be assembled to the armature core 3.
[0027]
Further, the opening 17 provided in the coil holder 9 is such that the circumferential width A3 of the upper coil end insertion portion 17b is larger than the circumferential dimension B3 of the one coil end 5b and the other coil end 5c. Is set smaller than the circumferential dimension B4. Thereby, since it can prevent that the coil division body 5 is inserted into the opening part 17 in the reverse direction, the coil division body 5 can be assembled | attached correctly with respect to the armature core 3. FIG.
Furthermore, according to the assembling apparatus 1 of the present embodiment, even if the size of the coil divided body 5 is different, production can be handled only by preparing a dedicated coil holder 9, so that the production preparation period can be shortened and capital investment can be made. Can also be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an armature coil assembling apparatus.
FIG. 2 is a plan view of an armature coil assembling apparatus.
FIG. 3 is a cross-sectional view of a coil holder.
FIG. 4 is a plan view of a coil holder.
FIG. 5 is a side view of a coil holder.
FIG. 6 is an enlarged view showing the shape of the opening.
FIG. 7 is a plan view of a coil divided body.
FIG. 8 is a side view of a coil divided body viewed from one coil end side.
FIG. 9 is a cross-sectional view showing a positioning state of the armature core and the coil holder.
FIG. 10 is a half sectional view of an armature.
FIG. 11 is a perspective view showing a joined state of the lower layer coil divided body and the upper layer coil divided body.
[Explanation of symbols]
1 Assembly device 3 Armature core 3a Slot 3b V-shaped groove (positioning means)
5 Lower layer coil division body 6 Upper layer coil division body 9 Coil holder (coil holding means)
10 Coil insertion machine (coil insertion means)
15b Positioning hole (positioning means)
17 opening 18 positioning protrusion (positioning means)
19 Spring (holding means)
20 Coil stopper (holding means)
27 Coil Insertion Arrow 29 Centering Protrusion (Iron Core Holding Means)
30 Positioning pin (Positioning means)

Claims (5)

An assembly apparatus for assembling a predetermined number of coil divided bodies on an armature core having a predetermined number of slots on the outer periphery,
The coil split body includes a coil piece inserted into the slot, a pair of coil end portions extending from both ends of the coil piece to the inner peripheral side substantially parallel to the axial end surface of the armature core, and the coil It consists of a coil joint bent in the axial direction from the inner peripheral side tip of the end,
The assembly apparatus includes:
Iron core holding means for holding the armature core in a predetermined position;
Coil holding means disposed on the outer periphery of the armature core, having an opening that penetrates in the radial direction facing the slot, and in which the coil divided body is set;
It has a coil insertion arrow that can be inserted into the opening from the radially outer side of the opening, and the coil divided body set in the opening by the coil insertion arrow is pushed in from the radially outer side of the opening , Coil insertion means for inserting the coil piece into the slot;
In order to align the positions of the slot, the opening, and the coil insertion arrow, the armature core, the coil holding means, and positioning means for positioning the coil insertion means are provided. Armature coil assembly device. 2. The armature coil assembly apparatus according to claim 1, wherein the coil holding means includes holding means for holding the coil divided body set in the opening. The said opening part is formed according to the shape of the said coil division body so that the assembly direction of the said coil division body can be specified with respect to the said armature core. Armature coil assembly equipment. The coil holding means has the same number of openings as the slots in the circumferential direction,
The armature coil assembling apparatus according to any one of claims 1 to 3, wherein the coil insertion means includes the same number of coil insertion arrows as the opening in the circumferential direction. An assembly method for assembling the coil divided body to the armature core using the armature coil assembly apparatus according to claim 1,
The coil divided body is set in the opening of the coil holding means, and the slots, the opening, and the coil insertion arrow are aligned by the positioning means, and then the coil divided body is inserted into the coil. A method for assembling an armature coil , wherein the coil piece is inserted into the slot by being pushed in from the radial direction by an arrow.

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