Agricultural Gauge Wheel Depth Adjustment Mechanism

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The existing depth adjustment mechanisms for disk openers in agricultural seeding machinery are prone to failure due to vibrations and exposure to dust, leading to inaccurate control of penetration depth over time, resulting in reduced crop emergence and mechanical issues such as seizure and wear.

Innovation Solution

A separable gauge wheel adjustment assembly comprising a spindle with a rectangular boss and a complementary tapered spline engagement formation, providing a secure and durable connection with the gauge wheel arm, which includes external seals for protection against dust and vibration, allowing for precise depth control.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional gauge wheel adjustment mechanism is used, then the depth adjustment function is provided, but the mechanism is prone to failure due to vibrations and dust exposure, leading to reduced reliability

Engineering Contradiction:

Improvereliability of depth adjustment mechanismVSAvoidvibrations and dust exposure

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The adjustment mechanism is divided into separate components: a gauge wheel support arm, a spindle, and a depth adjustment handle. These segments are connected through a tapered spline engagement that allows relative movement while maintaining connection, reducing stress concentration and improving reliability under vibrational loads.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A tapered spline engagement formation acts as an intermediary between the gauge wheel support arm and the spindle. This intermediate connection element distributes loads, reduces direct contact stresses, and accommodates relative movements caused by vibrations, thereby protecting the overall mechanism from failure.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Duration of action of stationary object

If the gauge wheel and mounting arrangement are exposed to dust and vibrations, then the adjustment mechanism can be operated, but wear and seizure occur, reducing the duration of action

Engineering Contradiction:

Improveservice life of adjustment mechanismVSAvoidwear and seizure

Core Design Contradiction:

Duration of action of stationary objectVSObject-generated harmful factors

Solution Approach 1:

Sealing elements are incorporated into the mounting arrangement to create protective barriers against dust ingress. These sealing films prevent contaminant entry into the tapered spline engagement area, reducing wear and preventing seizure, thereby extending the service life of the mechanism.

Inventive Principle:

Principle #30Flexible shells and thin films

3Measurement precision

If a simple mounting arrangement is used, then the device complexity is reduced, but the precision of depth control deteriorates due to wear and play

Engineering Contradiction:

Improveprecision of depth controlVSAvoidcomplexity of adjustment mechanism

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

A tapered spline engagement formation is used instead of simple flat surfaces. The tapered geometry provides self-centering and reduced play between components, while the spline teeth maintain precise positional relationships. This curved/tapered geometry improves depth control precision without requiring overly complex mechanisms.

Inventive Principle:

Principle #14Spheroidality (Curvature)

4Ease of operation

If the spindle connection allows rotation and adjustment, then the ease of operation is improved, but wear increases due to repeated movements

Engineering Contradiction:

Improveease of depth adjustmentVSAvoidwear of engagement surfaces

Core Design Contradiction:

Ease of operationVSLoss of substance

Solution Approach 1:

The tapered spline engagement replaces traditional friction-based or clearance-based rotational connections. The spline teeth engage positively to transmit rotational movement and adjust depth, reducing sliding friction and wear compared to simple bearing surfaces, while maintaining ease of operation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS11653586B2Agricultural ground opener depth adjustment mechanism

Publication Date: 2023.05.23 BPR ENG

AI summary

Ground opener units for agricultural seeding machinery and the like utilise a gauge wheel and associated depth adjustment mechanism for regulating the penetration depth of the disk opener in use. An improved gauge wheel adjustment assembly comprises a spindle adapted to be rotatably supported in a spindle sleeve, the spindle having a shaft with a first end with a rectangular boss adapted for engagement with a depth adjustment handle of the disk opener and a second end with a tapered spline engagement formation. A gauge wheel support arm has a complementary tapered spline formation for engagement with the spindle second end.