Vibrator Eccentric Mass Phase Synchronization Mechanism
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Solution Overview
Problem
Existing vibrator devices with multiple shafts face challenges in adjusting rotation phases and transferring rotational force efficiently, leading to difficulties in synchronizing eccentric masses and requiring multiple motors, which complicates phase adjustment and increases mechanical stress.
Innovation Solution
A mechanism using conical secondary gears and a shaft with threaded ends to establish and maintain phase differences between eccentric masses, allowing for reliable synchronization and reduced motor count by transferring rotational force through a gear transmission system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If each shaft is rotated by its own hydraulic motor, then the shafts can rotate at desired speeds and phases, but the adjustment of motor rotation becomes difficult and the device complexity increases
Solution Approach 1:
The patent combines multiple shaft rotations into a single drive system. One shaft is driven by a hydraulic motor, and the other shafts are synchronized through a common flexible element (belt) that connects all shafts, eliminating the need for multiple independent motors and simplifying the control system.
Solution Approach 2:
The patent introduces a flexible element (belt) as an intermediary to transmit rotational motion between shafts. This belt acts as a mediator that synchronizes the rotation of multiple shafts driven by a single motor, making phase adjustment easier through belt positioning rather than complex motor control.
2Reliability
If a flexible force-conveying belt is used to synchronize shafts, then shafts can rotate at desired phases, but the belt should not act as the conveyor of actual rotational force to avoid stress multiplication
Solution Approach 1:
The flexible element serves as a positional intermediary rather than a primary force conveyor. It synchronizes shaft positions through its flexibility and routing, while the actual rotational force is conveyed through direct mechanical connections from the motor to the primary shaft, separating the synchronization function from the power transmission function.
Solution Approach 2:
The patent segments the functions of force transmission and phase synchronization. The motor directly drives one shaft for force transmission, while the flexible element separately handles phase synchronization by routing belts between shafts, allowing each component to optimize its specific function without bearing combined stresses.
3Adaptability or versatility
If four or more shafts are used in the vibrator device, then adjustable vibration intensity is achieved, but the shafts must rotate as mirror images which complicates phase adjustment
Solution Approach 1:
The patent merges all shafts into a single synchronized system driven by one motor through a common flexible element. This unified approach allows multiple shafts (four or more) to rotate in coordinated phases without requiring complex individual motor controls, enabling versatile vibration patterns while simplifying the drive system architecture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables reliable phase adjustment and synchronization of eccentric masses with reduced mechanical stress and the option to use fewer motors, ensuring efficient vibration generation with adjustable intensity.
Implementation Method 1
The shaft showing the ends provided with threaded ends (2), only. The shaft (1) transfers rotational movement between the primary gears and specifically maintains the phase difference set between said primary gears
Implementation Method 2
comprising conical secondary gears (8) from which the rotational force is conveyed to the eccentric masses (m1, m2)
Implementation Method 3
the vibrator device comprises at least two rotatable eccentric masses whereby each mass is placed to rotate on its own shaft
Data Source
Figure 1~2
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AI summary
A vibrator device for producing impacts or vibration with adjustable intensity, the vibrator device comprising at least two rotatable eccentric masses (ml, m2) whereby each mass is placed to rotate on its own shaft, and the rotation of said shafts is arranged to take place by at least one rotating motor (M), and that between said eccentric masses (ml, m2) there is provided a mechanism conveying rotational force among said masses and including a shaft (1) conveying rotational force, as well as a wheel (3), such as a gear, rotating in cooperation with both said masses and provided with a centre opening. Said wheels (3) are interconnected by such a shaft (1) whose both ends contain a mating thread (2) fitting the screw thread arranged in the centre opening on both of said wheels, and to adjust the mutual rotating of the masses (ml, m2) the interconnecting shaft (1) may be moved in the axial direction by a power unit.