JPH0210786Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an inspection cover for a totally enclosed external fan type motor, and in particular improves the sealing performance of an inspection window provided in a motor frame.

[Prior Art] In order to maintain the motor so that it can always operate in the best condition, it is necessary to periodically inspect the wear of the brushes and the dirt and roughness of the commutator surface. Therefore, in general, in a fully enclosed external fan type motor, an inspection window is also provided on the external fan cover in correspondence with the inspection window formed on the motor frame, and after removing the outer cover of the inspection window on the external fan cover, The inner cover blocking the inspection window of the motor frame was removed to inspect the inside.

However, the lids that block the inside and outside inspection windows are screwed on.
Since they are each fixed independently with clamps or the like, the work of opening and closing the inner insulator lid becomes redundant, resulting in a drawback that inspection is time-consuming.

Furthermore, since there are two lids, twice as many screws and the like are required for fixing the lid, resulting in a large number of parts, and there are also drawbacks such as powder loss when removed.

Furthermore, since the inspection window provided on the motor frame is located inside the outer fan cover, it is difficult to completely seal it with a lid, and the dust in the cold air sent by the outer fan can leak into the cover. There was also a risk that they could get into the motor through the gap between the inspection window and the motor frame.

[Problems to be solved by the invention] The present invention has been proposed in view of the above-mentioned prior art.At the same time, the outer fan cover that is blocking the inspection window of the outer fan cover is removed, and at the same time, the inner motor frame is removed. The inner cover of the inspection window provided can also be removed, making it easy to remove the inner and outer covers and inspecting the inside of the motor.Furthermore, the inner cover can reliably seal the inspection window of the motor frame. An object of the present invention is to provide an inspection cover for a fan-shaped motor.

[Means for Solving the Problems] In order to achieve the above object, the fully enclosed external fan type inspection cover of the present invention has an inspection window on the external fan cover corresponding to the inspection window formed on the motor frame. established,
An outer cover that can be opened and closed from the outside of the outer fan cover is attached to the inspection window of the outer fan cover, and an inner cover is arranged on the inner surface of the outer cover to cover the inspection window of the motor frame when the outer cover is closed. One end is slidable in a guide hole provided in the outer cover, and the other end is connected to a support member fixed to the outer surface of the inner cover, and an elastic member provided between the inner cover and the outer cover of the support member. By integrally supporting the outer cover and the inner cover via the inner cover, when the inspection cover is closed, the inner cover seals the inspection window of the motor frame under the pressure of the elastic member, and
When the outer cover on the outer fan cover is opened, the inner cover is also opened at the same time, opening the inspection window of the motor frame.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 and 2.

In the figure, 1 is a motor frame, and 2 is an outer fan cover that covers the outer periphery of the motor frame 1. It is supported by a support part 3 formed on the outer periphery of the motor frame 1, and a duct 4 is connected between it and the motor frame 1. is forming. Although not shown, a fan for supplying cold air into the duct 4 is provided at the end of the motor.

An inspection window 5 is provided in a portion of the motor frame 1 facing the commutator. This inspection window 5 is closed by an inner cover 6, and a gasket 7 is attached around the inner cover 6, which is the periphery of the inspection window 5, for example, in order to maintain sealing performance.

On the other hand, an outer inspection window 8, which is slightly larger than the inner cover 6, is provided at a position corresponding to the inspection window 5 on the outer fan cover 2, and this inspection window 8 is closed by an outer cover 9. There is. These inner and outer lids 6 and 9 are both arcuate members that follow the shapes of the motor frame 1 and the outer fan cover 2, and the inner lid 6 has a plurality of pin-shaped support members 10 on its outer surface. The support member 10 is fixed to a guide hole 11 provided in the outer cover 9.
It is slidably inserted inside. A stopper 12 to prevent the support member 10 from coming off is provided at the tip of the support member 10 that protrudes to the outside of the outer lid 9. Further, an elastic member 13 such as a coil spring is provided between the inner cover 6 and the outer cover 9 of the support member 10 to bias the inner cover 6 toward the surface of the motor frame 1.

The outer cover 9 integrated with the inner cover 6 in this manner is fixed to the outer fan cover 2 so as to be openable and closable by a hinge 14 provided on one side thereof. Further, on the opposite side of the outer cover 9 from the hinge 14, a box lamp 15 for fixing the outer cover 9 is provided.

According to the inspection cover of this embodiment having such a configuration, when the box lamp 15 is removed and the outer cover 9 is opened when inspecting the motor, the inner cover 6 integrated therewith is also opened at the same time. Maintenance and inspection work can be easily performed and work time can be shortened. Furthermore, when the inspection cover is opened, the inner and outer lids do not come apart, making it easy to handle. On the other hand, when the outer cover 9 is closed, the inner cover 6 also works together to close the inspection window of the motor frame 1, but at this time, the inner cover 6 is closed by the pressing force of the elastic member 13 and the packing 7. Since it can be brought into close contact with the surface of frame 1,
There is no fear that a gap will be formed in the inspection window of the motor frame, and the sealing performance of the motor frame can be ensured.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and as the means for fixing the outer cover 9, other means such as screwing, screwing, fitting, etc. can be appropriately employed in addition to the hinge and the box clamp. In addition, the means for integrating the outer cover and inner cover can be freely selected as long as it does not obstruct the flow of cold air between the motor frame and the outer fan cover, and the end can be slidably inserted into the inner cover. You can also do that. Furthermore, the shape of the elastic member is not limited to a coil spring, but may also be a U-shaped leaf spring, an S-shaped spring, or a spring in which the spring itself also serves as a support member for the inner lid.

[Effects of the invention] As described above, according to the inspection cover of the present invention, there is no need for adjustment during installation, the inspection window can be opened and closed easily and in a short time, and maintenance and inspection of the motor can be carried out easily. , and the inner lid has excellent sealing performance, which has great effects.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of an inspection cover for a totally enclosed external fan type motor according to the present invention. 1...Motor frame, 2...Outer fan cover, 3
...Support part, 4...Duct, 5...Inspection window, 6...
...Inner lid, 7...Packskin, 8...Inspection window, 9...
Outer lid, 10... Support member, 11... Insertion hole, 12
... Stopper, 13 ... Elastic member, 14 ... Hinge, 15 ... Box clamp.

Claims (1)

[Scope of Claim for Utility Model Registration] The outside of the motor frame is covered with an outer fan cover, and the motor is cooled by supplying cold air by a fan to a duct formed between the motor frame and the outer fan cover. In a fully enclosed external fan type motor, an inspection window is provided on the outer fan cover in correspondence with the inspection window formed on the motor frame, and an outer cover that can be opened and closed from the outside of the outer fan cover is attached to the inspection window of the outer fan cover. At the same time, an inner cover is arranged on the inner surface of the outer cover to cover the inspection window of the motor frame when the outer cover is closed, and further, one end is slidable into a guide hole provided in the outer cover, and the other end is slidable into the guide hole provided in the outer cover. The outer cover and the inner cover are integrally supported via a support member fixed to the outer surface of the cover and an elastic member provided between the inner cover and the outer cover of the support member. Inspection cover for fully enclosed external fan type motor.