JPS62185529A - Motor - Google Patents

Abstract

PURPOSE:To drain water in a motor with a simple structure by forming a metal retainer made of a spherical recess on a lower bracket, forming a through hole on the bottom of the retainer, and providing a thrust retainer of an outer square shape to cover the hole. CONSTITUTION:A metal retainer 3 made of a spherical recess 2 is formed on a bracket 1, a through hole 4 is formed at the bottom of the retainer 3, and a thrust retainer 5 of outer square shape in provided to cover the hole 4. A metal 5 of outer spherical shape is attached to the retainer 3, a thrust retainer 6 is further provided, a shaft 8 is vertically provided through a ball 7 to form a vertical motor. The retainer 3 is formed in a spherical recess on the inner surface, and formed with a gap 9 to the retainer 6 of the outer square shape. Water fed to a bearing section is drained from the gap 9 downward.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of an electric motor configured vertically, that is, vertically.

``Prior Art'' Conventionally, in an electric motor configured vertically, that is, perpendicular to the shaft, a bearing that receives the thrust load of the shaft is configured in a lower bracket.

Most of these bearings have a recess formed in the lower bracket to which the bearing is fitted.In response to the thrust load of the shaft, a thrust load made of a resin plate is provided at the bottom of the recess to counteract the thrust load of the shaft. There was a ball between them.

This method has the advantage that it has a simple structure, is easy to assemble, and can be manufactured at low cost.

However, if water gets inside the motor due to dew droplets or other causes, this water will naturally flow to the lower bracket and collect in the thrust receiver.

In such cases, it is possible to drain the water by forming a through hole at the bottom of the recess, and this method has often been used.

However, since a thrust receiver is provided before reaching the through hole, water flows to the through hole using the small gap in the thrust receiver, which often results in poor water flow and water retention. Failures could occur.

Also, water adheres to the small gap formed between the thrust receiver and the bracket due to capillary action and does not flow properly.
The inside of the bearing was constantly damp, making the problem even worse.

Metal parts generally have lubricating oil, which makes it easier to separate water.
Failure tends to be avoided, but if the bearing is constantly wet, it cannot necessarily guarantee a longer bearing life than if it is dry.

In other words, after a long period of time, the inside of the bearing becomes constantly damp, and as if water were to penetrate into the metal, the oil screen on the surrounding area disappears due to the influence of water, which impairs the function of the bearing. Ta.

"Problems to be Solved by the Invention" The present invention has been made in view of the above circumstances.
The purpose of the present invention is to provide an electric motor having a simple structure and a structure capable of effectively draining internal water.

1. The present invention provides a method in which a metal receptacle consisting of a spherical recess is formed in the lower bracket, a through hole is formed at the bottom of the metal receptacle, and the through hole is covered. The problem was solved by providing a thrust receiver with a rectangular outline.

``Function'' The inner surface of the metal receiver, which is made up of a spherical recess, is spherical, so if a thrust receiver with a rectangular outer shape is installed, the corner of the thrust receiver will come into contact with the inner surface of the metal receiver, creating a large gap. can.

Drainage can be easily carried out through this gap, and almost no water remains in the gap due to capillary reduction.

In addition, the bearing can be kept dry at all times, and various types of damage to the bearing part can be avoided.

[Example 1] The present invention will be explained based on an example shown in the drawings. Fig. 1 is a vertical cross-sectional view of essential parts showing an example of the electric motor according to the invention. Figure 2 is a partial plan view thereof.

Figures 1 and 2 show the main parts of an electric motor that is configured vertically to the axis with upper and lower brackets. A through hole 4 is formed at the bottom of the receiving part 3, and a thrust receiving part 5 having a rectangular outer shape is formed so as to cover this through hole 4.
is provided.

A metal 5 having a spherical outer shape is attached to the metal receiver C cup portion 3, and a thrust receiver 6 is further provided, and a shaft 8 is vertically provided with a ball 7 interposed therebetween. It forms an electric motor.

Further, the metal receiving portion 3 is a concave portion having a spherical inner surface, and forms a gap 9 between the metal receiving portion 3 and the thrust receiving portion 6 having a rectangular outer shape.

In such a configuration, if water droplets form inside the motor due to dew droplets or other causes, or if a small amount of water flows into the bearing due to some obstacle, the connection between the positive 1 to receiver 6 and the metal receiver 3 Water can be drained downward through the gap 9 formed between them.

Water can then be drained to the outside through the through hole 4 at the bottom.

Moreover, since the thrust receiver 6 has a rectangular outer shape, there is little contact between the thrust receiver 6 and the metal receiver 3, and water is hardly retained due to capillary reduction.

Therefore, this part is kept dry at all times, preventing deterioration of the lubricating oil and corrosion of the bracket 2, and making it possible to extend the life of the bearing.

Furthermore, if the thrust receiver 6 is formed into a rectangular shape as in this embodiment, it is convenient to take the material for the parts, and the parts can be formed at low cost.

Of course, other shapes are also possible, and if the outer diameter is square and the gap 9 is formed between the bracket 2 and the metal receiving part 3, the same effect can be obtained. It will be done.

Furthermore, the interior is well dried through the through hole 4 and gap 9, creating favorable conditions for lubricating oil, extending the life of the bearing and ensuring sufficient reliability against secular changes such as noise and sliding resistance. can.

"Effects of the Invention" As described above, according to the present invention, the water accumulated in the bearing can be easily drained and the bearing can be constantly dried, so that the bearing performance can be guaranteed for a long period of time. can.

Therefore, it is possible to avoid an increase in the sliding friction of the bearing, eliminate problems such as corrosion, form a bearing with a long life, and obtain a highly reliable electric motor.

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[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of an embodiment of an electric motor according to the present invention, and FIG. 2 is a partial plan view thereof. 1...Bracket, 3...Metal holder [pu part,
4...Through hole, 6...Slath 1 to receiver, 8...
shaft.

Claims (1)

[Claims] In an electric motor that has brackets on the top and bottom and is configured vertically to the axis, a metal receiving part consisting of a spherical recess is formed in the lower bracket, a through hole is formed in the bottom of this metal receiving part, and the through hole is covered. An electric motor characterized in that it is equipped with a thrust receiver having a rectangular outline.