JPH0667144B2 - Winding structure of motor rotor - Google Patents

Description

The present invention relates to a winding structure of a motor rotor, and more particularly to a winding structure of a motor rotor characterized by a lead wire between a coil and a commutator.

<Prior Art> Conventionally, a relatively large amount of time is spent on winding a coil in the manufacture of a motor rotor, but particularly, a lot of time is required for connecting the starting end of the coil wire to a commutator tongue. That is, if it is a lead wire between coils,
For example, by winding the commutator tongue to form an α shape, it is stably engaged with the tongue, whereas
If you try to wind the commutator tongue so that the starting end of the coil wire is in the same α shape, a considerable part of the starting end of the coil wire will be wasted, so simply hook the starting end of the coil wire on the commutator tongue. I am trying. Therefore, if the first coil winding process is performed as it is, a relatively large tension acts on the coil wire,
There is a risk of disengagement between the beginning end of the coil wire and the commutator tongue. Therefore, conventionally, during the process of winding the first coil, the starting end of the coil wire is held on the commutator tongue by a tool for engaging the starting end of the coil wire with the commutating tongue. It was Therefore, there is a problem that a relatively large amount of time is required to perform the winding process of the first coil.

<Problems to be Solved by the Invention> In view of the problems of the prior art as described above, the main object of the present invention is to improve the manufacturing efficiency by improving the starting end treatment of the coil wire, and to improve the ordinary winding. It is to provide a winding structure of a motor rotor that can be manufactured by the device.

<Means for Solving the Problems> According to the present invention, there is provided an armature having a plurality of cores coaxially mounted on a rotary shaft and circumferentially divided by axial slots. A motor having a commutator fixed coaxially to a portion of the rotary shaft axially separated from the armature, and a plurality of coils wound around the core so as to pass through the slots of the core. In the rotor winding structure, a section of the first wound coil wound away from the commutator is received in the first slot,
The section of the coil wound in the direction of approaching the commutator is received in the second slot, and the lead wire from the commutator to the coil that is wound first rushed directly into the first slot. This is achieved by providing a winding structure for a motor rotor, characterized in that the coil is formed by rushing into the second slot after passing through a slot having a sharper rush angle than the case. .

<Operation> As described above, the required friction holding force is applied to the coil only by passing the starting end of the coil wire through the slot having a sharp rush angle with respect to the slot in which the first coil is directly received. Since the tool for holding the starting end of the coil wire can be removed and the first coil can be wound, the winding process of the coil is speeded up.

<Embodiment> Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a motor rotor to which the present invention is applied. A sleeve 2 made of an insulating material is fitted in an intermediate portion of the rotary shaft 1, and an armature 3 and a commutator 4 are fixed to the outer circumference of the rotary shaft 1 so as to be spaced from each other along the axial direction and coaxial with each other. The armature 3 is formed by laminating a large number of thin plates, and has eight cores 6 divided along the circumferential direction by eight slots 5 extending in the axial direction. A plurality of coils 7 are wound around the core 6 so as to pass through these slots 5. The commutator 4 is divided into eight segments 8 that are insulated from each other along the circumferential direction, and tongues 9 provided in each segment.
Have and. The lead wire 10 of the coil 7 is connected to these tongues 9 as described later.

FIG. 2 shows an embodiment of a winding structure according to the present invention wound by a double flyer type winding machine. The commutator segment 8 is composed of eight segments 11 to 18, the rotor core 6 is composed of eight cores 21 to 28, and the slot 5 is composed of eight slots 31 to 38. The tongue 9 is not shown.

The starting end of the coil wire is engaged with the segment 11 and extends slightly obliquely toward the direction B in FIG.
Indicated as 51 is a slot 38 which is offset by two in the B direction in FIG. 2 with respect to the slot 32 facing the segment 11, passes through the slot 38, and then in the A direction in FIG. It extends toward and joins the first wound coil 41. This coil 41 has a slot as the first slot.
A section 41a which is received by 31 and is wound in a direction away from the commutator 4, and a slot 3 as a second slot.
4 has a section 41b wound in a direction to approach the commutator 4 and has three cores 21 to 23 wound in the second counterclockwise direction. Lead wire 51 is a slot
After passing through 38, they join the coil section 41b.

The end of the coil 41 is connected to the segment 12 as a lead wire 52, and then the lead wire 53 is inserted into the slot 32 and the second end
The coil 42 of is formed. In this way, the coils 43 and 44 are wound around the positions adjacent to each other in the direction A in FIG. 2 via the lead wires 54 to 57, and the end of the fourth coil 44 is used as the lead wire 58. Connect to segment 15.

When using a single flyer winding machine, the end of the coil wire is connected to the segment to which the beginning of the same coil wire is connected, whereas when using a double flyer winding machine The start end of the coil wire wound around one flyer is connected to the end of the coil wire wound around the other flyer.

Thus, the lead wire 51 passes through the slot 38 farther from the slot 34 as the second slot than the slot 31 as the first slot, and then the first coil 41 is wound, so that the lead to the slot 31 is lead. The rush angle of the wire 51 becomes sharper than that when it directly rushes into the slot 31, and even if the starting end of the lead wire 51 is simply engaged with the tongue of the segment 11, the lead wire that bends and extends through the slot 38 is formed. The frictional force acting on the portion 51 supports the tension acting on the coil wire when the coil 41 is wound, and the lead wire 51
The engagement between the starting end of the and the tongue of the segment 11 cannot be released. Therefore, even if the tool for engaging the start end of the coil wire with the tongue of the segment 11 is removed before the coil 41 is wound, the start end of the coil wire and the segment are removed.
The coil can be wound rapidly without the engagement between the tongue 11 and the tongue being released.

Note that the present invention is not limited to the above, and for example, the slot into which the lead wire 51 as the starting end should project is not limited to the slot 38 in the above-described embodiment, but rather than the case where the lead wire 51 directly projects into the slot 31. Any slot may be used as long as it has an acute plunge angle.

<Effects of the Invention> As described above, according to the present invention, the handleability of the lead wire can be improved without making a great change to the existing winding machine, and the time required for the winding process of the motor rotor can be reduced. A great effect can be achieved in shortening.

[Brief description of drawings]

FIG. 1 is a perspective view showing a motor rotor to which the present invention is applied. FIG. 2 is a development diagram showing an embodiment of the winding structure according to the present invention. 1 ... Rotary axis, 2 ... Sleeve 3 ... Armature, 4 ... Commutator 5 ... Slot, 6 ... Core 7 ... Coil, 8 ... Segment 9 ... Tang, 10 ... Lead wire 11-16 ...... Segment 21-28 ...... Core, 31-38 ...... Slot 41-48 ...... Coil, 51-58 ...... Lead wire

Claims (1)

[Claims] 1. An armature having a plurality of cores coaxially mounted on a rotating shaft and circumferentially sectioned by axial slots, and a portion of the rotating shaft axially spaced from the armature. In a winding structure of a motor rotor having a commutator fixed coaxially and a plurality of coils wound around the core so as to pass through the slots of the core, A section of the coil wound in a direction away from the commutator is received in a first slot, and a section of the coil wound in a direction approaching the commutator is received in a second slot, and the section is wound from the commutator. After the lead wire leading to the first wound coil passes through the slot having a sharper plunge angle than that when it directly plunges into the first slot. Winding structure of the motor rotor, characterized by forming the coil projects into the second slot.