Axle Bar Seal Guide Tab Mechanism

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Solution Overview

Problem

Existing sealing systems for work vehicles fail to maintain a seal effectively as the axle bar rotates and pivots, leading to reduced traction and occupant comfort when traversing uneven terrain.

Innovation Solution

A sealing system comprising a shaft seal plate, a seal guide with a tab, and a shaft seal, where the guide slot in the shaft seal plate allows the seal guide to translate and the tab blocks rotation, ensuring the seal is maintained during axle bar rotation and pivoting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a traditional sealing system is used for the axle bar, then the structure is simple, but the seal cannot be maintained effectively as the axle bar rotates and pivots

Engineering Contradiction:
Improveseal effectivenessVSAvoidsealing system structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The sealing system is divided into separate functional components: a seal guide with a guide slot, a shaft seal with a seal body, and a tab mechanism. This segmentation allows each component to perform its specific function independently - the guide slot accommodates translational movement while the tab prevents rotation, enabling the seal to maintain effectiveness during axle bar rotation and pivoting without requiring a completely complex integrated structure

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The tab acts as an intermediary element between the shaft seal and the seal guide. It mediates the interaction by blocking rotation of the shaft seal relative to the seal guide while allowing the seal guide to translate within the guide slot. This intermediary mechanism resolves the contradiction by providing a simple yet effective way to maintain seal integrity during dynamic operation

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If the seal guide is allowed to translate during axle bar pivoting, then the seal maintains effectiveness, but the tab must block rotation which adds structural elements

Engineering Contradiction:
Improveseal maintenanceVSAvoidseal guide and tab structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The sealing system incorporates dynamic characteristics by allowing the seal guide to translate within the guide slot as the axle bar pivots, while the tab dynamically blocks rotation. This dynamic design enables the seal to adapt to the changing positions during rotation and pivoting, maintaining seal effectiveness without requiring an overly complex fixed structure

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The guide slot is oriented in a specific dimension that allows translational movement of the seal guide while the tab blocks rotation in a different dimensional aspect. By separating the degrees of freedom - allowing movement in one dimension (translation along the guide slot) while constraining movement in another dimension (rotation blocked by the tab) - the system achieves reliable sealing without excessive structural complexity

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS11454323B2Sealing system for a moving shaft
Publication Date: 2022.09.27 BLUE LEAF I P INC
  • US11454323B2 patent drawing
  • US11454323B2 patent drawing
  • US11454323B2 patent drawing

AI summary

A sealing system includes a shaft seal plate, a seal guide having a tab, and a shaft seal coupled to the seal guide. A guide slot is formed in the shaft seal plate, and the tab extends into the guide slot. The shaft seal is configured to form and substantially maintain a seal at an axle bar as the axle bar rotates and pivots. The seal guide is configured to translate relative to the shaft seal plate as the axle bar pivots, and the tab is configured to block a rotation of the seal guide and the shaft seal relative to the shaft seal plate as the axle bar rotates.