JPS6325878Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a six-pole DC motor used as a starter motor.

A conventional example of this type of device is shown in FIG. That is, in FIG. 1, reference numeral 1 denotes a six-pole starting motor, which includes a six-pole DC motor 2 and an electromagnetic switch 3. 4a, 4
b is a positive electrode side brush, and this positive electrode side brush 4
Lead wires (pigtails) 5a from a and 4b, respectively.
5b is led out, and the ends of these lead wires 5a and 5b are connected to each other at the position A in the figure, and furthermore, a power supply lead wire 6 is connected to this connection point. The power lead wire 6 is connected to the terminal 3a of the electromagnetic switch 3 via a connector 7 fixed to the other end thereof. Further, 8 is a negative electrode side brush, and 9 is a brush spring that presses and biases the positive electrode side brushes 4a, 4b and the negative electrode side brush 8 so as to come into sliding contact with the commutator 10. The winding of the armature connected to the commutator 10 is a wave winding, and the positive side brushes 4a, 4b and the negative side brush 8 are arranged symmetrically at 60° as shown in the figure.
They are arranged at angular intervals of degrees.

Since the operation of the starter motor configured as described above is generally known, a description thereof will be omitted.

By the way, in the conventional device with the above configuration,
The lead wires (pigtails) of the positive brushes 4a and 4b
5a and 5b are led out in the same direction and have different lead wire lengths, which leads to an increase in the number of parts, makes it easy to make mistakes during assembly, and makes it difficult to install the brush spring 9. There were other drawbacks.

This idea was made in order to eliminate the drawbacks of the conventional device as described above, and it made it possible to use the same length as the lead wires of a pair of brushes, and furthermore, the lead wires of the brush spring and the lead wires were The present invention provides a six-pole DC motor that can be arranged symmetrically.

An embodiment of this invention will be described below with reference to the drawings. In Fig. 2, 11 is a six-pole starting motor;
Reference numeral 12 indicates a six-pole type DC motor, and reference numeral 13 indicates a pair of positive electrode brushes, which have an angular interval of 60 degrees from the negative electrode brush 8 as in FIG.
They are arranged at angular intervals of 120 degrees with respect to 0. 14 is arranged between the negative electrode side brush 8 and the positive electrode side brush 13, and the positive electrode side brush 13
A pair of positive brush springs 15 are disposed between a pair of negative brushes 8 to press and bias the negative brushes 8, and 16 are a pair of negative brush springs 16, each of which has one end connected to the positive brush 13.
A pair of lead wires of the same length are led out to the middle part on the sides separated by 120 degrees, and the other ends of these lead wires are connected together with the power lead wire 17. The configuration on the electromagnetic switch 3 side is the same as that shown in FIG. 1, and the operation of each part is also the same, so a description thereof will be omitted.

In this way, the pair of positive brushes 13 are arranged at angular intervals of 120 degrees with respect to the commutator 10, and the pair of negative brushes 8 are arranged at angular intervals of 60 degrees with respect to the positive brush 13. arranged on the opposite side of the 120 degree angular interval, and
Since the positive brush spring 14 is arranged between the positive brush 13 and the negative brush 8, the pair of lead wires 16 can be drawn out from the positive brush 13 to the middle part in opposing directions. Therefore, the lengths of the pair of lead wires 16 can be made the same and can be made the shortest length, reducing management costs by reducing the number of parts, improving work efficiency, and improving lead wires. To reduce the device cost by shortening the length of the lead wire 16, to reduce the circuit resistance of the motor, to improve the vibration resistance of the lead wire, and to downsize the entire device by reducing the space for routing the lead wire 16. I can do it.

As described above, according to this invention, it is possible to make the lead wire lengths of a pair of brushes the same with a simple configuration, which reduces the number of parts in the device, reduces management costs, and improves work efficiency. In addition, since the lead wire length can be minimized, it is possible to reduce device costs, reduce circuit resistance, improve vibration resistance, and downsize the device. It has the advantage of being effective.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram showing a conventional starting motor;
The figure is a configuration diagram showing a six-pole starter motor which is an embodiment of this invention. In the figure, 3 is an electromagnetic switch, 12 is a 6-pole DC motor, 13 is a positive brush, 8 is a negative brush,
10 is a commutator, 14 is a positive brush spring, 15 is a negative brush spring, 16 is a lead wire, and 17 is a power supply lead wire. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] A commutator 10, which is arranged at an angular interval of 120 degrees from each other with this commutator 10 as the center, and whose tip end is connected to the commutator 1.
A pair of positive electrode side brushes 13 that are in sliding contact with each other.
and a pair of negative brushes 8 disposed on the opposite side of the positive brushes 13 with an angular interval of 120 degrees, the tips of which are in sliding contact with the commutator 10, respectively.
and are arranged between the positive electrode side brush 13 and the negative electrode side brush 8, respectively, and the positive electrode side brush 1
3 to the commutator 10, and a pair of positive brush springs 14 to press and bias the negative brush 8 to the commutator 10.
A pair of negative brush springs 15 are connected at one end to the positive brush 13, and the other end is connected to the positive brush 13.
A pair of lead wires 16 of the same length led out to the middle part on the side with an angular interval of 100 degrees, and a power supply lead wire 17 connected all together to the other end of these lead wires 16. A 6-pole DC motor characterized by: