Dual eccentric shaft driving mechanism

Patent metadata

Field	Value
Publication number	US-10288146-B2
Application number	US-201815893172-A
Country	US
Kind code	B2
Filing date	Feb 9, 2018
Priority date	Sep 27, 2017
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

A dual eccentric shaft driving mechanism comprises a motor, a first eccentric shaft, and a second eccentric shaft. The first eccentric shaft has a first eccentric portion. The second eccentric shaft has a second eccentric portion connected to the first eccentric shaft. The motor is connected to the first eccentric shaft for driving the first and the second eccentric shaft to rotate. Wherein, the first and the second eccentric shaft are connected to have a same rotating direction. A phase difference between the first and the second eccentric portion is maintained at 180 degrees. Compared to the prior art, a second centrifugal force generated by the rotation of the second eccentric shaft is balanced by a first centrifugal force generated by the rotation of the first eccentric shaft in the present invention. Therefore, the vibration generated in the operation of the present invention is drastically reduced.

First claim

What is claimed is:

1. A dual eccentric shaft driving mechanism, comprising:
a motor;
a first eccentric shaft, connected to the motor, having a first eccentric portion;
a second eccentric shaft, connected to the first eccentric shaft, having a second eccentric portion; and
a processing mechanism, connected to the first eccentric portion to process a workpiece reciprocatively
wherein the first eccentric shaft and the second eccentric shaft are connected to have the same rotating direction, while the first eccentric shaft and the second eccentric shaft rotate, a phase difference between the first eccentric portion and the second eccentric portion is maintained at 180 degrees.

2. The dual eccentric shaft driving mechanism of claim 1 , wherein the first eccentric shaft and the second eccentric shaft have the same rotation speed.

3. The dual eccentric shaft driving mechanism of claim 1 , wherein the first eccentric shaft generates a first centrifugal force while rotating, the second eccentric shaft generates a second centrifugal force while rotating, and the first centrifugal force is balanced with the second centrifugal force in the dual eccentric shaft driving mechanism.

4. The dual eccentric shaft driving mechanism of claim 1 , wherein a first eccentricity is between the rotation center of the first eccentric portion and the rotation center of the first eccentric shaft, a second eccentricity is between the rotation center of the second eccentric portion and the rotation center of the second eccentric shaft, and the first eccentricity is equal to the second eccentricity.

5. The dual eccentric shaft driving mechanism of claim 1 , wherein the motor is configured between the first eccentric shaft and the second eccentric shaft, or the second eccentric shaft is configured between the first eccentric shaft and the motor.

6. The dual eccentric shaft driving mechanism of claim 1 , wherein the motor is a servomotor, and the connection among the motor, the first eccentric shaft, and the second eccentric shaft comprises a belt, a gear belt, and a gear.

Assignees

• Univ Nat Taiwan Normal

Inventors

• Chen Shun-Tong
• Chou Wei-Yu
• Chiang Chao-Jung

Classifications

• F16F15/22 Primary

  Compensation of inertia forces {(suppression of vibrations of rotating systems by favourable grouping or relative arrangements of the moving members of the system or systems F16F15/20, counterweights F16F15/28; correcting-weights for balancing rotating bodies F16F15/32)} · CPC title

• F16F15/28

  Counterweights, {i.e. additional weights counterbalancing inertia forces induced by the reciprocating movement of masses in the system, e.g. of pistons attached to an engine crankshaft (rotating balancer shafts F16F15/264; correcting-weights for balancing rotating bodies F16F15/32)}; Attaching or mounting same · CPC title

• F16H7/023

  with belts having a toothed contact surface or regularly spaced bosses or hollows for slipless or nearly slipless meshing with complementary profiled contact surface of a pulley · CPC title

• B26D5/08 Primary

  Means for actuating the cutting member to effect the cut · CPC title