JPS5930598Y2 - Rotating electric machine for vehicles - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement of a rotating electric machine for a vehicle.

Conventionally, rotating electrical machines for vehicles, such as self-ventilating main motors,
As shown in FIGS. 1 and 2, a first opening for inspecting the commutator 6, brushes 7, brush holder 7, etc. is provided in the cylindrical side of one end of the motor body 1, and the opening is used for the intake air. It also serves as a mouth, and a removable inspection cover 2 with a function of purifying intake air is attached to the opening.

The inspection cover 2 has a ventilation filter for cleaning when outside air is taken in.

On the other hand, at the other end of the cylindrical side of the main body of the moke, there is a second tube for discharging the air sucked in from the ventilation filter to the outside through the field coil 5.
The opening of the morph rotor is provided near the fan 4 which is pivotally connected to the morph rotor.

By the way, Morph ventilation filters usually have a contradictory relationship: if you try to increase the dust collection effect, the pressure loss will increase and the air volume will decrease, and if you try to increase the air volume, the dust collection effect will decrease. have.

Therefore, the dust collection effect of the filter is determined to some extent by the required cooling air volume of the morph, and for this reason, the ventilation filter cannot completely remove dust, iron powder, sand, water, etc. from the cooling air. , a certain amount of dust and the like will be taken into the motor together with the cooling air.

In a self-ventilating traction motor for a vehicle, the ventilation filter 3 is integrated with the morph inspection cover 2 as described above, and the commutator 6 is placed directly below the outlet hole a of the ventilation filter 3. Therefore, in the conventional electric motor, etc., dust that is not filtered by the ventilation filter 3 falls directly onto the surface of the commutator 6, and the commutator 6 is contaminated by dust, iron powder, sand, etc. There is a problem of roughness of the surface and abnormal wear of the brush 7, and there is also a problem of causing accidents such as inducing flashover due to conductive substances such as iron powder and water adhering to the surface of the commutator 6. Ta.

The present invention is an attempt to solve the above problem, and by providing a dustproof cover on the outlet hole of the ventilation filter, dust, iron powder, sand, water, etc. that are not filtered by the ventilation filter can be removed. To provide a rotating electrical machine for a vehicle that is prevented from falling directly onto a commutator surface.

An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 3 and 4, a brush T and a brush holder 8 are attached to a commutator 6 which is pivotally attached to the rotor of a morph (rotating electric machine).
is engaged.

The cylindrical side of the motor body near the commutator 6 is provided with an opening that doubles as an inspection port and a ventilation port, and a cover that covers the opening is used for inspecting the commutator 6 and purifying the air. A ventilation filter 3 is provided.

Between the outlet hole a of the ventilation filter 3 and the commutator section consisting of the current element 6, the brush 7, and the brush holder, there is a field coil that protrudes from the outlet hole a of the ventilation filter 3 into the motor body. A dustproof cover 9, which is a plate shaped like a dogleg, is attached to guide the air flow to the air conditioner 5.

The other end of this dustproof cover 9 is supported by a support 10.

The dustproof cover 9 has a width close to the diameter of the commutator 6, and is located directly above the commutator 6 and between the brushes 7.7.

Moreover, the dustproof cover 9 is disposed so as to protrude between the outer diameter of the motor body 1 and the outer diameter of the commutator, and is configured to reduce airflow resistance.

Therefore, in this embodiment, even if dust, iron powder, sand, water, etc. that have not been filtered by the ventilation filter 3 flow in from the outlet hole a together with the cooling air, they will hit the dust cover 9 and Since the dust is guided to the field coil 5 side by the suction force of a fan (not shown), these dustproof materials do not fall directly onto the commutator 6 surface.

In addition, in the above-mentioned embodiment, explanation was given taking as an example the case where the ventilation filter 3 has only one outlet hole a, but the present invention is applicable to a rotary vehicle equipped with a ventilation filter 3 having a plurality of outlet holes a, a. It can also be used in electrical equipment.

5 and 6 show a rotating electric machine for a vehicle equipped with a ventilation filter 3 having two outlet holes a, a, and in this case, the dustproof cover 9 has an Okayama outlet hole a, as shown in the figure. It may be of a width extending over a, or may be provided for each outlet hole a, a.

Furthermore, the present invention is not limited to the above-mentioned embodiments, but can be widely applied to general rotating electric machines for vehicles in which the ventilation filter is integrated with the inspection cover and the commutator is located at a position opposite to the outlet hole of the ventilation filter. However, the shape of the dustproof cover may be arbitrarily determined depending on the shape of the exit hole, etc.

Since the present invention is as described above, regardless of whether the dust collection performance of the ventilation filter is good or not, even if the dust collection performance is poor, dust, iron powder, sand, water, etc. that have entered the rotating electric machine can be rectified. It is possible to prevent accidents caused by such dust and the like by preventing it from falling directly onto the child surface.

[Brief explanation of drawings]

Figure 1 is a longitudinal sectional front view showing a conventional rotating electrical machine for vehicles;
The figures are a sectional view taken along the line A-A in Fig. 1, Fig. 3 is a longitudinal sectional front view showing an embodiment of the present invention, Fig. 4 is a sectional view taken along the line B-B in Fig. 3, and Fig. 5 is a sectional view taken along the line A-A in Fig. 1. The figure is a longitudinal sectional front view showing another embodiment of the present invention, and FIG. 6 is a sectional view taken along the line CC in FIG. 5. 1... Motor body, 2... Inspection cover, 3... Ventilation filter, 6... Commutator,
9...Dust-proof cover, a...Exit hole.

Claims (1)

[Scope of utility model registration request] A field coil provided in the main body of the rotating electric machine, a rotor rotatably supported in the center thereof, a commutator and a cooling fan pivotally attached to the rotor, and further a rectifier for the rotating electric machine. A first opening provided on the side of the main body near the fan, and a second opening provided on the side of the main body near the blower fan, and a ventilation filter provided on the side of the first opening. The cover is interposed between the ventilation filter and the commutator,
A rotating electric machine for a vehicle, characterized in that a dustproof cover is provided so as to protrude into the inside of the rotating electric machine.