Fluid-Driven Bevel Gear Adjustment for Precise Backlash Control

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Solution Overview

Problem

Conventional methods for adjusting bevel gears are cumbersome and time-consuming, requiring the addition or removal of spacers to adjust backlash and contact patterns, which are further complicated by wear and tear leading to repeated adjustments.

Innovation Solution

An adjustment device utilizing fluid-driven power sources with pistons and displacement sensors to automatically adjust the position of bevel gears along axial directions, allowing for precise control and repositioning without detaching the gears, and an automatic adjustment system that analyzes vibration data to determine necessary displacements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If spacers are added or removed to adjust bevel gear position, then the backlash and contact pattern can be adjusted, but the adjustment process becomes troublesome and time-consuming

Engineering Contradiction:
Improvebacklash and contact pattern adjustment precisionVSAvoidadjustment time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent replaces the traditional mechanical spacer adjustment system with a fluid-driven piston system. The piston can be moved axially using hydraulic or pneumatic pressure to adjust the position of the bevel gear, eliminating the need to add or remove physical spacers. This substitution transforms a manual, time-consuming mechanical process into an automated fluid-powered adjustment mechanism.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent employs a fluid-driven power source (hydraulic or pneumatic cylinder) to actuate the piston that adjusts the bevel gear position. By controlling fluid pressure, the system can precisely move the piston along the axial direction, thereby adjusting the gear position and backlash without manual intervention. This pneumatic/hydraulic approach enables rapid, repeatable adjustments compared to manual spacer changes.

Inventive Principle:
Principle #29Pneumatics and hydraulics

2Ease of operation

If manual spacer adjustment is used, then backlash can be adjusted, but the process requires detaching and reinstalling bevel gears repeatedly

Engineering Contradiction:
Improveadjustment operation simplicityVSAvoidadjustment system complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent introduces a dynamic adjustment mechanism where the piston can be moved axially to change the position of the bevel gear relative to the mating gear. This dynamic positioning capability allows the system to adapt backlash and contact pattern during operation or maintenance without disassembling the gear assembly, making the adjustment process reversible and repeatable.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The piston acts as an intermediary element between the fluid-driven power source and the bevel gear. Instead of directly manipulating the gear or using spacers, the piston mediates the adjustment by translating fluid pressure into precise axial movement, thereby simplifying the operator's task while maintaining system integrity.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Reliability

If bevel gears are worn, then backlash changes occur, but repeated manual adjustments are required to maintain proper tooth contact

Engineering Contradiction:
Improvetooth contact stabilityVSAvoidmaintenance efficiency
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The patent incorporates displacement sensors that detect the position of the piston and provide feedback to the control system. This feedback mechanism enables the system to monitor and maintain the desired backlash and contact pattern automatically. When wear occurs, the system can detect position changes and adjust the piston accordingly to compensate, reducing the need for manual re-adjustment and maintaining reliable tooth contact over time.

Inventive Principle:
Principle #23Feedback

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 efficient and precise adjustment of backlash and contact patterns between bevel gears, reducing the need for manual spacer adjustments and addressing wear-related issues, thereby simplifying the process and improving system stability.

Implementation Method 1

a first fluid-driven power source (110) including a first cylinder housing (111) and a first piston (112). The first piston (112) is configured to move the first bevel gear (26) along a first axial direction (A1)

Methodology Applied
Scientific EffectHydraulic pressure: Hydraulic Press

Implementation Method 2

a first fluid-driven power source (110) including a first cylinder housing (111) and a first piston (112)

Methodology Applied
Scientific EffectPneumatic pressure: Pressure Gradient

Implementation Method 3

The first displacement sensor (130) is disposed on the first cylinder housing (111) and configured to generate a displacement data (131) related to the first piston (112)

Methodology Applied
Scientific EffectDisplacement sensing: Displacement

Data Source

PatentUS11391357B2Adjustment device for bevel gear, automatic adjustment system for bevel gear and adjustment methods for bevel gear
Publication Date: 2022.07.19 IND TECH RES INST
  • US11391357B2 patent drawing
  • US11391357B2 patent drawing
  • US11391357B2 patent drawing

AI summary

An adjustment device configured to move first bevel gear and second bevel gear that are disposed on base and are meshed with each other. Adjustment device includes first adjustment assembly, and second adjustment assembly. First adjustment assembly includes first fluid-driven power source, first brake component and first displacement sensor. First fluid-driven power source includes first cylinder housing and first piston. First cylinder housing is configured to be disposed on base. First piston is movably disposed on first cylinder housing. First bevel gear is configured to be disposed on first piston. First piston is configured to move first bevel gear along first axial direction. First brake component is configured to be disposed on base and configured to stop or release first piston. First displacement sensor is disposed on first cylinder housing and configured to generate displacement data related to first piston.