JP2000197323A - Armature coil squeezing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To squeeze the end parts of a number of armature coils attached to the outer circumference of a core into the recessed grooves of a commutator together. SOLUTION: An armature coil squeezing device, which squeezes the end parts 10a and 10b of a number of armature coils 10 attached to the outer circumference of a core 2 put on the center part of a shaft 1 into the recessed grooves 9 of a commutator 3 put on one end small diameter part 1a of the shaft 1 has an annular unit 15 and a number of squeezing members 16 arranged radially on the annular unit 15. The commutator 3 is inserted into the annular unit 15, and the respective squeezing members 16 are transferred inward so as to have the end parts 10a and 10b of the respective armature coils 10 squeezed into the recessed grooves 9 of the commutator 3 by the respective squeezing members 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an armature coil pushing device for pushing the ends of a large number of armature coils mounted on the outer periphery of a core into respective grooves of a commutator.

[0002]

2. Description of the Related Art FIGS. 6 to 9 show an example of an amateur for a DC motor. This comprises a shaft 1, a core 2 fitted in the center of the shaft 1, a shaft 1
And a commutator 3 externally fitted to the small-diameter portion 1a at one end. The commutator 3 comprises an integrated inner cylindrical portion 4, an insulating synthetic resin material 5, and a conductive metal outer cylindrical portion 6. The portion 6 is divided into a plurality of divided members 6a along the circumferential direction, and the insulating layer 7 is interposed between the divided members 6a,
Grooves 8 and 9 are formed on the outer peripheral surface of each core 2 and the riser 6b of each divisional member 6a at a predetermined interval α in the circumferential direction, and a large number of amateurs with an insulating coating made of a rectangular copper wire formed in a substantially U shape. The coil 10 is inserted into each of the concave grooves 8 of the core 2 two by two via the insulating sheet 11, and the both ends 10 of the amateur coil 10 are pushed outward by a predetermined distance β.
a and 10b are fitted into each of the grooves 9 of the commutator 3 two by two. As a result, as shown in FIG. 9, each of the amateur coils 10 is divided into a plurality of groups 10A to 10D and each of the groups 10A to 10D. The ends 10a and 10b of the armature coil 10 are connected to each other. In FIG. 6, reference numeral 12 denotes a fan fitted to the other end small-diameter portion 1b of the shaft 1, and reference numeral 13 denotes a binding belt.

Conventionally, when assembling an amateur,
Both ends 10a and 10b of the substantially U-shaped amateur coil 10
8 is spread outward at a predetermined interval β to form a state shown in FIG. 8, and the formed amateur coil 10 is hit with a hammer to fit into each groove 8 of the core 2, and both ends 10 a and 10 b of the Commutator 3 with a hammer
In each of the grooves 9.

[0004]

In the above-mentioned conventional configuration,
Both ends 10a and 10b of a large number of amateur coils 10 are struck with a hammer and forcedly pushed into the respective grooves 9 of the commutator 3, and the pushing takes time and effort. There is a possibility that the insulating film coated on 10 may be damaged.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional disadvantages, the present invention is directed to an armature coil pushing device capable of pushing the ends of a large number of armature coils mounted on the outer periphery of a core into respective grooves of a commutator at once. It is intended to provide.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, a number of amateur coils are mounted on an outer peripheral portion of a core fitted to a central portion of a shaft,
An armature coil pushing device for pushing an end of each armature coil into each groove of a commutator externally fitted to one end of the shaft, comprising an annular body, and a plurality of radially arranged annular bodies. Having a pushing member, by inserting a commutator into the annular body and moving each pushing member inward, thereby pushing the end of each of the amateur coils into each groove of the commutator by each pushing member. It is characterized by doing so.

According to the above construction, the commutator is inserted into the annular body, and only a large number of pushing members radially arranged on the annular body are moved inward, and each of the pushing members causes the end of the armature coil to move to the end of the commutator. Since it can be smoothly pushed into the concave groove and does not give an impact at the time of the pushing, there is no possibility that the insulating film covering the amateur coil is damaged.

According to a second aspect of the present invention, in the first aspect of the present invention, each of the pushing members is formed integrally with a shaft portion movably supported by the annular body and an inner end of the shaft portion. Further, it is characterized in that it is formed in a substantially T-shape with a head wider than the shaft portion, and the heads of the adjacent pushing members are movably overlapped.

According to the above construction, each pushing member is substantially T
Since the heads of the adjacent pushing members are movably overlapped with each other, the inner peripheral surface of the head of each pushing member is connected in an annular shape, and the inner peripheral surface connected to the annular shape has a large number. The ends of the armature coil are uniformly pressed from the entire circumference, and each end can be reliably pushed into each groove of the commutator.

According to a third aspect of the present invention, in the second aspect of the present invention, concave steps are formed on both side edges of the heads, and the concave steps of adjacent heads are movably fitted. It is characterized by being combined.

[0011] According to the above-described structure, the concave steps formed on both side edges of each head allow the side edges of the adjacent heads to be overlapped so as not to be bulky.

According to a fourth aspect of the present invention, in the first aspect of the present invention, an annular rotating body is rotatably disposed on the annular body, and the rotating body and each of the pushing members are cammed. The push members are reciprocally moved in the radial direction via the cam mechanism by rotating the rotating body in the forward and reverse directions by being interlocked and connected by a mechanism.

[0013] According to the above construction, by simply rotating the rotating body in one direction, the cam members move the pushing members integrally inward to collectively put the ends of the many amateur coils into the respective grooves of the commutator. It can be pushed efficiently.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, a support base is arranged below the annular body so as to be able to move up and down concentrically with the annular body,
A core is placed on the support base via a shaft, and the support base is raised to insert one end of the shaft into the annular body, and a commutator is externally fitted to one end of the shaft. Are made to face each of the pushing members.

According to the above configuration, after raising the support base and inserting one end of the shaft on the support base into the annular body,
By simply fitting the commutator to one end of the shaft, the commutator can be positioned on each pushing member.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show an amateur coil pushing device according to an embodiment of the present invention, which comprises an annular body 15, a large number of pushing members 16 radially arranged on the annular body 15, and an annular body. And a support table 17 disposed below the support table 15.

As shown in FIGS. 1 and 2, the annular body 15 is fixed to a base frame 18 and has a lower annular portion 15a whose inner diameter R1 is set to be slightly larger than the outer diameter r of the core 2.
An upper annular portion 15b fixed concentrically on the lower annular portion 15a and having an inner diameter R2 set to be larger than the inner diameter R1 of the lower annular portion 15a.

As shown in FIGS. 1, 2 and 4, each of the pushing members 16 has a shaft portion 16a disposed between the upper and lower annular portions 15a and 15b so as to be movable in the radial direction.
The shaft portion 16 formed integrally with the inner end of the shaft portion 16a
The heads 16b are formed in a substantially T-shape with the heads 16b having a width wider than a. A concave step 19 is formed on both side edges of each of the heads 16b, and the concave steps 19 of the adjacent heads 16b move. Mated as possible.

According to the above configuration, each of the adjacent heads 16b
Since the concave step portions 19 are movably fitted to each other,
By overlapping the side edges of the heads 16b so as not to be bulky, the thickness t of each head 16b can be made uniform, and the inner peripheral surface of the head 16b of each pushing member 16 can be formed. 16A are connected in a ring shape, and the end portions 10 of the large number of amateur coils 10 are formed by the ring-shaped inner circumferential surface 16A.
The a and b can be pressed uniformly from the entire circumference and securely pushed into the respective grooves 9 of the commutator 3 (see FIG. 5).

As shown in FIGS. 1 and 2, below the pushing members 16 in the annular body 15, the inner diameter is
An annular rotator 21, which is set to be substantially the same as the inner diameter R2 of the b, is rotatably arranged, and the rotator 21 and each pushing member 16
And a driving mechanism 23 for rotating the rotating body 21 in the forward and reverse rotations a and b.

As shown in FIGS. 1 and 2, the cam mechanism 22 is formed on the upper surface of the rotating body 21 with a cam pin 22a protruding from the shaft 16a of each pushing member 16, and is fitted to the cam pin 22a. By rotating the rotating body 21 in the direction of the arrow a.
Each pushing member 16 is connected to the annular body 15 via the cam mechanism 22.
The pushing member 16 can be made to protrude inward from the annular body 15 via the cam mechanism 22 by rotating the rotating body 21 in the direction of the arrow b (see FIG. 2). .

As shown in FIGS. 1 and 2, the drive mechanism 23 can move forward and backward c and d along a tangential direction of the rotating body 21 on a guide rail 26 on a receiving shelf 25 fixed to the base frame 18. A nut 28 fixed to one end of the movable plate 27 is screwed to a ball screw 30 rotated forward and reverse by a drive motor 29 on a receiving shelf 25, and the movable plate 27 is A recess 31 formed at the other end of the nut 27 is fitted to a guide roller 32 provided on the outer periphery of the rotating body 21, and the drive motor 29 is driven to rotate the ball screw 30 in the forward and reverse directions. The movable plate 27 is moved forward and backward by c and d, thereby rotating the rotating body 21 forward and backward in the directions of arrows a and b via the guide roller 32.

As shown in FIG. 1, the support base 17 is arranged below the annular body 15 and concentrically with the annular body 15,
The lifting and lowering device (not shown) lifts and lowers e and f.
An insertion hole 17a for inserting b is formed.

According to the above structure, the shaft 1 is inserted into the insertion hole 17a of the support 17 with the support 17 lowered.
The other end of the support base 1b is inserted through
7, the support base 17 is raised e, and the small-diameter portion 1 a at one end of the shaft 1 is
The commutator 3 can be positioned on each push-in member 16 only by inserting the commutator 3 through the inside (see the solid line in FIG. 1) and externally fitting the commutator 3 to the small diameter portion 1a at one end from above (see the virtual line in FIG. 1).

The procedure of pushing the armature coil 10 will be described. First, a number of armature coils 10 are inserted into the respective concave grooves 8 of the core 2 and both ends 10a and 10b are pushed outward by a predetermined distance β to form. (See FIG. 8).

Next, after the core 2 is placed on the support 17 via the shaft 1, the support 17 is raised e,
The small-diameter portion 1a of the shaft 1 is inserted into the annular body 15 (see FIGS. 1 and 2), the commutator 3 is fitted to the small-diameter portion 1a at one end, and each groove 9 of the commutator 3 is It is opposed to the ends 10a and 10b (see FIG. 5A).

Subsequently, by moving the movable plate 27 in the direction of arrow d via the ball screw 30 and the nut 28 by the drive motor 29, the rotating body 21 is rotated in the direction of arrow b via the guide roller 32. As a result, as shown in FIGS. 3 and 5B, each push member 16 is projected inward in the radial direction via the cam mechanism 22, and the inner peripheral surface of the head 16 b of each push member 16. 16A, the end portions 10a, 10b of a large number of amateur coils 10 are pressed evenly from the entire circumference, and each end portion 10a, 10b is pushed into each groove 9 of the commutator 3.

Thereafter, the armature is bound by a binding band 13 and the fan 12 is fitted to the small-diameter portion 1b at the other end of the shaft 1 to obtain an amateur shown in FIG.

[0029]

According to the first aspect of the present invention, the commutator is inserted into the annular body, and a large number of pushing members radially arranged in the annular body are moved inward. The end can be smoothly pushed into each groove of the commutator, and no impact is given at the time of pushing, so that there is no possibility that the insulating film covering the amateur coil is damaged.

According to the second aspect of the present invention, each pushing member is formed in a substantially T-shape, and the heads of the adjacent pushing members are movably overlapped with each other. The inner peripheral surface of the armature is connected in an annular shape, and the end portions of a large number of amateur coils are evenly pressed from the entire circumference by the inner peripheral surface connected in the annular shape, and each end portion is securely pushed into each groove of the commutator. Can be.

According to the third aspect of the present invention, the concave steps formed on both side edges of each head allow the side edges of the adjacent heads to be overlapped so as not to be bulky.

According to the fourth aspect of the present invention, by simply rotating the rotating body in one direction, the pushing members are integrally moved inward by the cam mechanism so that the ends of the large number of amateur coils are moved to the commutator. It can be efficiently pushed into the groove at once.

According to the fifth aspect of the present invention, after the support stand is raised and one end of the shaft on the support stand is inserted into the annular body, the commutator is merely fitted to one end of the shaft. The commutator can be positioned on each pushing member.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a state before pushing an amateur coil pushing device according to an embodiment of the present invention.

FIG. 2 is a plan view of the same state.

FIG. 3 is a plan view of the pressed state.

FIG. 4 is a perspective view of a main part of the pushing member.

FIG. 5A is a perspective view of a main part before the pushing,
(B) is a perspective view of a main part in the pushed state.

FIG. 6 is a half sectional side view of an amateur.

FIG. 7 is a view taken along the line AA of FIG. 6 in the right half, and FIG.
FIG.

FIG. 8 is an exploded perspective view of the main part.

FIG. 9 is a schematic development view showing a connection state of an amateur coil.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shaft 1a One end small diameter part of shaft 2 Core 3 Commutator 9 Concave groove 10 Amateur coil 10a Amateur coil end 10b Amateur coil end 15 Annular body 16 Push member 16a Shaft of push member 16b Head of push member 17 Support Table 19 Concave step 21 Annular rotating body 22 Cam mechanism

Claims (5)

[Claims] A large number of armature coils are mounted on an outer peripheral portion of a core fitted to a central portion of a shaft, and an end portion of each armature coil is inserted into each groove of a commutator fitted to one end portion of the shaft. An amateur coil pushing device for pushing, comprising an annular body and a number of pushing members radially arranged in the annular body, inserting a commutator into the annular body, and placing each pushing member inside. Characterized in that the end portions of the respective amateur coils are pushed into the respective grooves of the commutator by the respective pushing members. 2. Each of the pushing members is substantially T-shaped by a shaft movably supported by the annular body and a head wider than the shaft integrally formed at an inner end of the shaft. 2. The amateur coil pushing device according to claim 1, wherein the pushing members are formed in a letter shape, and the heads of adjacent pushing members are overlapped so as to be movable. 3. The recess according to claim 2, wherein a concave step is formed on both side edges of each head, and the concave steps of adjacent heads are movably fitted to each other. Amateur coil pushing device. 4. An annular rotating body is rotatably disposed on the annular body, and the rotating body and each of the pushing members are interlocked and connected by a cam mechanism. By rotating the rotating body forward and backward, the rotating body is rotated. The armature pushing device according to any one of claims 1 to 3, wherein each pushing member is reciprocated in a radial direction via a cam mechanism. 5. A support base is arranged under the annular body concentrically with the annular body so as to be able to move up and down, and a core is placed on the support base via a shaft, and the support base is raised. By inserting one end of the shaft into the annular body,
The armature coil pushing device according to any one of claims 1 to 4, wherein a commutator is fitted to one end of the shaft so that the commutator faces each of the pushing members.