Pressure Relief Device for a Gear Box

Abstract

A pressure relief device for a gear box which is disposed in the gear box and comprises a body, a blocking member and a spring. The body is defined with a penetrating hole. The spring pushes the blocking member and makes it seal the penetrating hole. When the pressure rises since the temperature therein is risen, and when the gas pressure in the gear box is larger than the force of the spring, the gas can push the blocking member and compress the spring, and then discharge from the penetrating hole of the body, thus reducing the pressure and the temperature of the gear box.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a component for a transmission device, and more particularly to a pressure relief device for a gear box.[0003]2. Description of the Prior Art[0004]A conventional gear box usually comprises a housing in which a plurality of gears being engaged with each other are disposed, and such a gear box can be used as a vehicle transmission box, or a speed changing device for a rotary cutting mechanism. In order to make the gears perform rotation and engaging movement more smoothly, the lubricating oil, such as machine oil or gear oil, is provided on the gears. However, when performing high speed, or long time rotation and engaging movement, the gears will produce heat energy and oil gas due to friction, such that the gas temperature in the gear box will be risen and the gas will be expanded. When the gear box is an enclosed space, the pressure inside the gear box will continuously rise, and when th...

AI Technical Summary

Benefits of technology

[0008]The primary objective of the present invention is to provide a pressure relief device for a gear box which utilizes a spring to push a blocking member and make it seal a penetrating hole, when gas pressure in the gear box is enough to compress the spring, the gas will be discharged from the penetrating hole, so as to reduce the pressure and temperature of the gear box. In addition, at ordinary times, the penetrating hole is in close condition, so as to prevent the lubricating oil from discharging from the gear box due to overturn of the gear box.

[0010]By such arrangements, the gear box can keep in close condition at ordinary times, so as to prevent the lubricating oil from discharging from the gear box due to overturn of the gear box. When the temperature in the gear box rises due to the friction of the gears to make gas in the gear box expand, and when the gas pressure which continuously rises enough to compress the elastic member, the gas will push the blocking member and compress the elastic member, and then the gas will discharge from the penetrating hole of the body, thus reducing the pressure and temperature of the gear box.

Problems solved by technology

When the gear box is an enclosed space, the pressure inside the gear box will continuously rise, and when the structural intensity of the gear box is unable to support the gas pressure, the gear box will be damaged, or even cracked.

As a result, the environment is polluted.

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