Reverse-Rotation Counterweight Shaker for Linear Vibration Balance

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing shaking devices with reciprocating poles for harvesting olives suffer from vibration issues due to complex structures, multiple components, and twisting forces, which affect operability and stability.

Innovation Solution

A shaking device with a crankshaft unit, connecting rod, and a reverse-rotation portion that includes a counterweight, where the center of gravity moves linearly opposite to the reciprocating pole, counteracting inertial forces without causing perpendicular vibrations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If a counterweight rotating in a first direction is added to counteract inertial force, then the inertial force is reduced, but vibrations in a direction perpendicular to the inertial force are caused

Engineering Contradiction:

Improveinertial forceVSAvoidperpendicular vibrations

Core Design Contradiction:

ForceVSObject-affected harmful factors

Solution Approach 1:

A counterweight is attached to the reverse-rotation gear to generate an inertial force that opposes the inertial force of the reciprocating portion. The counterweight's center of gravity moves linearly along the reciprocating axis, creating a balancing effect that reduces overall vibration without introducing perpendicular vibrations.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

Solution Approach 2:

Instead of rotating the counterweight in the same direction as the main rotation shaft, the reverse-rotation gear rotates in the opposite direction. This reverse rotation ensures that the counterweight's centrifugal force acts in the same direction as the inertial force of the reciprocating portion, effectively counteracting it without causing perpendicular vibrations.

Inventive Principle:

Principle #13The other way round (Inversion)

2Object-affected harmful factors

If two counterweights rotating in opposite directions are added to counteract perpendicular centrifugal force, then perpendicular vibrations are reduced, but the device complexity increases

Engineering Contradiction:

Improveperpendicular vibrationsVSAvoidstructure complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

A single counterweight is sufficient because it is attached to the reverse-rotation gear, which already rotates in the opposite direction. This counterweight simultaneously counteracts both the inertial force and the perpendicular centrifugal force, eliminating the need for a second counterweight and simplifying the overall structure.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

Solution Approach 2:

The reverse-rotation gear with its attached counterweight performs multiple functions: it counteracts the inertial force of the reciprocating portion and simultaneously counteracts the perpendicular centrifugal force. This multi-functionality reduces the total number of components needed.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Force

If the main rotation shaft and driven shaft are offset in vertical direction, then the counterweights can be positioned to reduce shocks, but the case size is enlarged

Engineering Contradiction:

Improveshock reductionVSAvoidcase size

Core Design Contradiction:

ForceVSVolume of moving object

Solution Approach 1:

The reverse-rotation gear rotates in the opposite direction to the main rotation shaft, allowing the counterweight to be positioned effectively without requiring vertical offset between shafts. This reverse rotation achieves shock reduction while maintaining a more compact horizontal configuration.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The functions of the main rotation shaft and driven shaft are merged into a single rotation shaft with the reverse-rotation gear attached. This integration eliminates the need for separate offset shafts and reduces the overall case size while maintaining shock reduction capabilities.

Inventive Principle:

Principle #5Merging (Combining)

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

The device achieves a compact, lightweight design with fewer components and a simple structure, effectively reducing inertial forces and twisting forces, enhancing operability and stability.

Implementation Method 1

a counterweight 44 attached to the reverse-rotation gear 42... whereby a center of gravity of the reverse-rotation portion is reciprocated along an reciprocating axis to counteract an inertial force acting on the reciprocating portion

Methodology Applied

Scientific EffectInertial force: Inertia

Implementation Method 2

the reverse-rotation gear 42 being configured to mesh with an internal gear fixed to a case and to be driven so as to revolve around the first rotation axis and spin around a second rotation axis

Methodology Applied

Scientific EffectGear mechanism: Gear

Data Source

PatentEP4344533B1Shaking device

Publication Date: 2026.02.25 YAMABIKO CORP

Figure 1
Figure 2
Figure 3

AI summary

Provided is an improved compact and lightweight shaking device having fewer components and a simple structure, capable of counteracting an inertial force acting on a reciprocating portion without causing vibrations in a direction perpendicular to the inertial force of the reciprocating portion. A counterweight (44) and a reverse-rotation gear (42) perform rotational motion, i.e., revolution around a first rotation axis (C) and spinning around a second rotation axis (E), whereby a center of gravity of a reverse-rotation portion (52) including the counterweight (44) and the reverse-rotation gear (42) is reciprocated along the same reciprocating axis (A) as a reciprocating portion (2).