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Self-cooling back-connect driver motor assembly

Self-cooling back-connect driver motor assembly description/claims

1. Field of the Invention

The present invention generally relates to a rotary motive power apparatus, and more particularly to a motor having a back-connect driver that drives a centrifugal fan to rotate for providing an air current to the driver for the heat dissipation of the motor.

2. Description of Prior Art

At present, equipments such as motor drivers or driving devices generally use a heat dissipating structure with heat dissipating fins to dissipate heat for the equipments. For example, a “Motor driver heat dissipating structure” disclosed in R.O.C. Pat. No. M301458 is one of these heat dissipating structures.

However, the technical measure taken by aforementioned patent for solving the heat dissipation problem of a motor driver is to increase the number of heat dissipating fins in order to achieve the desired heat dissipating effect, and thus the motor will come with larger overall volume and weight, and the air dissipating effect will be poor because the hot air inside the motor driver cannot be dissipated effectively to the outside. If an air current is provided by an external fan for dissipating the heat produced by the motor driver, then an additional power supply will be needed for the operation of the external fan, and the installation of the external fan requires more spaces. Obviously, the foregoing arrangement is not convenient for use.

In view of the shortcomings of the prior art, the inventor of the present invention provides a reasonable and feasible design in accordance with the present invention to overcome the foregoing shortcomings.

It is a primary objective of the present invention to provide a self-cooling back connect driver motor assembly, and the motor assembly mainly connects a centrifugal fan to a rear end of a spindle of the motor, and the spindle is protruded from front and rear ends of the motor, such that when the motor spindle rotates, the centrifugal fan provides a heat dissipating effect for the interior of the motor driver.

To achieve the foregoing objective, the present invention provides a self-cooling back connect driver motor assembly, and the motor assembly includes a motor, a centrifugal fan and a driver; wherein the motor includes a motor body and a spindle pivotally connected to the motor body and having its front and rear ends protruded from the motor body. The centrifugal fan is installed at a distal end of the spindle for driving the motor. The driver with a casing is installed on the motor body and sheathed onto the centrifugal fan, and a sidewall of the casing has air holes including air inlet holes disposed farther from the motor body and air outlet holes disposed nearer to the motor body. When the motor spindle is rotated, outside air current is sucked and entered through the air inlet holes of the casing of the driver, and then driven by the centrifugal fan to blow towards the interior of the driver, and finally discharged from the air outlet holes of the casing to the outside, so as to achieve a thermal exchange effect by forming a convection between the outside and the interior of the driver.

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a perspective view of the present invention;

FIG. 3 is an exploded view of a motor and a centrifugal fan of the present invention;

FIG. 4 is a section view of an interior of a driver of the present invention;

FIG. 5 is an exploded view of a motor and a centrifugal fan in accordance with another preferred embodiment of the present invention; and

FIG. 6 is a section view of an interior of a driver in accordance with another preferred embodiment of the present invention.

• Provisional Patent
• Utility Patent

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