JPS5827748B2 - Coreless motor rotor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a coreless motor rotor comprising a cylindrical coil 2 formed by winding a conducting wire 1 into a cylindrical shape.
- The winding start end 3 and the winding end end 4 of the conductor 1 located at the tap part of the cylindrical coil 2 are overlapped in parallel and electrically connected, and this electrically connected portion is connected to the circumferential surface of the cylindrical coil 2 when the conductor 1 is wound. This relates to a rotor of a coreless motor which is bent and overlapped along the rotating direction, and this overlapped portion is located within the inner and outer circumferential surfaces of a cylindrical coil 2.

The object of the present invention is to prevent cracks in the conductor at the tap portion of the cylindrical coil and unnecessary protrusion from the inner and outer circumferential surfaces of the cylindrical coil in a coreless motor rotor consisting of a cylindrical coil formed by winding a conductor into a cylindrical shape. To provide a coreless motor rotor with improved quality.

Figure 6 shows the rotor of a conventional coreless motor.
A cylindrical coil 2 is formed by winding a conducting wire 1 into a cylindrical shape, and a winding start end 3 and a winding end end 4 of the conducting wire 1 located at the ends of the cylindrical coil 2 are connected in a twisted wire shape. It was connected by soldering.

In such a conventional example, as shown in FIG. was bent approximately at right angles and soldered to the upper surface of the commutator piece 5.

However, since the stranded wire portion 6 is formed by twisting the conductor wires 1 together, when the stranded wire portion 6 is bent at a right angle, an excessive tensile force is applied to the outer circumferential side of the bent portion.
This part had the disadvantage of cracking and breaking the wire.

Furthermore, since the apparent outer diameter of the stranded wire portion 6 is large, if the stranded wire portion 6 is bent toward the commutator piece 5 side and this portion is soldered, this portion becomes bulky, as shown in FIG. As shown in FIG. 2, during silking of the motor, the brush 7 positioned so as to be in sliding contact with the commutator piece 5 sometimes came into contact with the solder 9 portion, deforming the brush 7.

Further, as shown in FIG. 9, when the stranded wire portion 6 is bent, the stranded wire portion 6 is bent in a large curve, so that rl
A deformation of the length shown in lr2 occurs, and when the motor is assembled, this portion hits the inner wall of the stator 8, resulting in a defective starting operation.

The present invention was invented to solve each of the drawbacks of the above-mentioned conventional examples, and one embodiment is shown in FIG.

The cylindrical coil 2 is formed into a cylindrical shape by sequentially repeating the process of winding the conductor 1 diagonally and folding it back diagonally. are superimposed in parallel, and this superimposed portion is superimposed on the outer circumferential surface of the cylindrical coil 2 along the winding direction of the conducting wire 1, and that portion is electrically connected by solder 9.

Thereafter, as shown in FIG. 4a, a cylindrical core metal 10 is inserted into the cylindrical coil 2, and a coil forming mold 11 is pressed against both sides of the cylindrical coil 2.
As shown in FIG. 4, the solder 9 enters inside the outer peripheral surface of the cylindrical coil 2, and the cylindrical coil 2 is formed into a completely cylindrical shape.

12 is a commutator base inserted into the upper end of the inner circumference of the cylindrical coil 2. On the upper surface of this commutator base 12, a commutator piece 5 divided into five is arranged, and each commutator Piece 5 is cylindrical coil 2
It is electrically connected to current-carrying parts 13 provided at five locations, respectively.

FIG. 2 shows another embodiment in which the overlapping portion of the winding start end 3 and winding end 4 of the conductor 1 is superimposed on the inner peripheral surface of the cylindrical coil 2, as shown in FIG. 5a. Using the core metal 10 and the coil forming mold 11, the cylindrical coil 2 is finished into a completely cylindrical shape as shown in FIG.

FIG. 3 shows that either the winding start end 3 or the winding end 4 of the conductor 1 is extended to the bottom of the cylindrical coil 2, and the tip end 14 is bent inside the cylindrical coil 2 in the direction of the outer circumference of the conductor 1. This prevents peeling.

As described above, the present invention electrically connects the winding start end and the winding end end of the conductive wire located at the tap portion of the cylindrical coil by overlapping them flatly. Even if the conductor is bent in the direction, no unreasonable force is applied to the bent part of the conductor, and cracks do not occur as in the conventional case where the conductor is bent in a stranded shape, so wire breakage can be prevented. Moreover, since the overlapping portion of the conductor wire is bent and superimposed on the circumferential surface of the cylindrical coil along the winding direction of the conductor wire, the overlapping portion between the ends of the conductor wire can be accommodated.

In general, the bent portion of the conductor does not have a large curve, which prevents unfavorable deformation.Furthermore, since this overlapping portion is located within the inner and outer circumferential surfaces of the cylindrical coil, Therefore, when the rotor is inserted into the morph, the rotor will not come into contact with stakes, brushes, etc., resulting in poor commutation and startup. This has the effect of eliminating defects.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted perspective view of one embodiment of Honpatsu Town, Fig. 2 is a partially omitted perspective view of another embodiment of the same as above, and Fig. 3 is a partially omitted perspective view of another embodiment of the same as above. , Figure 4a. b and FIGS. 5a and 5b are cross-sectional views showing the forming operation of the cylindrical coil as above, FIG. 6 is a partially omitted perspective view of the conventional example, and FIG. 7 is a reduced scale showing an assembled state of the conventional example as above. The perspective view, FIGS. 8 and 9 are partial cross-sectional views of the conventional example. 1 is the conducting wire, 2 is the cylindrical coil, 3 is the winding start end of the conducting wire,
4 is the end of the winding of the conducting wire.

Claims (1)

[Claims] 1. In a coreless motor rotor made up of a cylindrical coil formed by winding a conductor wire into a cylindrical shape, the winding start end and winding end end of the conductor wire located at the tap part of the cylindrical coil are overlapped in parallel. A rotor for a coreless motor, which is electrically connected and is formed by bending and overlapping the electrical connection portion on the circumferential surface of a cylindrical coil along the winding direction of a conductive wire, and positioning this overlapping portion within the inner and outer circumferential surfaces of the cylindrical coil.