Speed controller for motor preventing interference from reverse input

Abstract

Disclosed is a speed controller for a motor, which gives a normal rotation and constant speed output to an output cover when a driving shaft of the motor rotates in a normal direction and a normal rotation and speed-changed output to the output cover when the driving shaft of the motor rotates in a reverse direction, wherein when the restriction means are restricted to the driving shaft at constant speed and changed speed, at least one of the two restriction means is not restricted at any position, so that interference caused by a reverse input can be prevented although rotation is reversely input from the output cover. In the speed controller for motor preventing interference from reverse input according to the present invention, a key is formed to protrude on an outer circumference of the driving shaft; a pawl-mounting ring having a key groove with a greater width than the key is coupled to the key; a constant speed pawl and a speed changing pawl having opposite directions are mounted to the pawl-mounting ring so that lower portions of them extend to the key groove; and the pawl-mounting ring is frictionally fixed by an additionally fixed friction pin, whereby at least one of the constant speed pawl and the speed changing pawl is made lie down by the key according to a rotation direction of the driving shaft. Also, according to the present invention, the driving shaft has a polygonal outer circumference; a ball-mounting ring is coupled to the outer circumference, the ball-mounting ring including therein a constant speed ball and a speed changing ball spaced apart from each other by a predetermined distance so that upper and lower sides of them protrude; and the ball-mounting ring is frictionally fixed by an additionally fixed friction pin, whereby at least one of the constant speed ball and the speed changing ball escapes from the outer circumference according to a rotation direction of the driving shaft.

Description

technical field [0001] The present invention relates to a speed controller for a motor, and more particularly, to a speed controller for a motor that prevents interference due to a reverse input, which is configured to move in only one direction when driven in forward and reverse directions rotation, and has a function of preventing interference due to reverse input by dispersing input and receiving input in only one direction when rotational force is reversely input from the output side, to prevent stop of operation of the speed controller. Background technique [0002] Typically, a rotating device such as a carrier or an industrial machine gets its driving force from a motor. In this case, the rotational force output from the motor may be transmitted through another transmission mechanism. In other cases, a transmission mechanism can be provided in the motor itself, so that the rotational force can be output directly or through another transmission mechanism. [0003] In...

AI Technical Summary

Problems solved by technology

[0007] Thus, when the output unit 20 rotates counterclockwise, the constant speed pawl 11 and the speed change pawl 12 are all restrained, so that the transmission mechanism does not work

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