Annular Planetary Ring Gear Press-Fit Sealing Method
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Solution Overview
Problem
Existing methods fail to securely attach an annular planetary ring gear to a tractor back axle housing, leading to dislodged fragments from the housing material entering the axle and causing damage to internal components due to the difference in hardness between the gear and the housing.
Innovation Solution
A method involving the formation of gripping formations and a seal receiving recess on the annular planetary ring gear, which is pressed into the axle housing, and a sealing member is inserted to prevent fragment escape, utilizing a polymeric L-shaped seal with a retaining groove to secure the seal and capture dislodged fragments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the annular planetary ring gear is pressed into the tractor axle housing to secure it, then the gear is firmly attached to the housing, but fragments of housing material are dislodged and may enter the axle causing damage to internal components
Solution Approach 1:
A seal is introduced as an intermediary component between the annular planetary ring gear and the tractor axle housing. This seal serves dual functions: it prevents fragments from escaping into the axle while also preventing lubricating oil from penetrating into the interface between the gear and housing, thereby resolving the contradiction between secure attachment and fragment prevention
2Strength
If the annular planetary ring gear is pressed into the tractor axle housing, then the gear is secured in position, but fragments dislodged during pressing may be carried by lubricating oil and cause serious damage to gearing within the axle
Solution Approach 1:
The seal acts as a protective intermediary that blocks the pathway for fragments to be carried by lubricating oil into the axle. By placing this barrier at the interface between the ring gear and housing, the system maintains both secure attachment and protection against fragment-induced damage to internal gearing
Solution Approach 2:
The seal receiving recess is designed to extract and contain fragments at the interface between the ring gear and housing. The recess, combined with the seal, creates a containment zone that captures dislodged fragments before they can be carried away by lubricating oil, thereby protecting the axle's internal components
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
Effectively secures the annular planetary ring gear, preventing fragments from escaping and causing damage to other components within the axle housing, ensuring the longevity of the gear and other internal components by using a polymeric seal to contain dislodged material.
Implementation Method 1
pressing the first component into the aperture in the second component so that the gripping formation cut into the cooperating surface of the other component to hold the first component in the aperture
Implementation Method 2
inserting a sealing member into the sealing recess to prevent any fragments of either component dislodged during the pressing operation from escaping from between the components
Data Source
Figure 1
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Figure 3
AI summary
A method of securing a first component such as an annulus gear (17) in an aperture (20) in a second component such as a tractor back axle housing (10). The method comprising the steps of forming gripping formations (21) and a seal receiving recess (22) in an outer peripheral surface of the first component (17) or in an inner peripheral surface of the aperture (20), pressing the first component (17) into the aperture (20) in the second component (10) so that the gripping formations (21) cut into the cooperating surface of the other component to hold the first component in the aperture. A sealing member (23) is inserted into the sealing recess (22) to prevent any fragments of either component dislodged during the pressing operation from escaping from between the components (10,17).