Offset Mounting Adapter for Uniform Concrete Tool Wear
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Solution Overview
Problem
Conventional surface processing machines tend to pivot unevenly when transitioning from trowel blades to surface processing tools, leading to uneven wear and reduced tool lifespan due to the spider arm's tendency to pivot towards a trailing side down position, causing the bearing to bind and the tool to wear unevenly.
Innovation Solution
A mounting adapter is provided that positions the rotational or longitudinal axis of surface processing tools circumferentially behind the trailing side of the spider arm, preventing the spider arm from pivoting and allowing the tools to rotate freely and maintain a flat orientation on the concrete surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If surface processing tools are mounted directly beneath the spider arm, then the tool can be positioned for surface processing, but the spider arm pivots unevenly causing the tool to wear unevenly and reducing tool lifespan
Solution Approach 1:
An offset mounting adapter is introduced as an intermediary component between the spider arm and the surface processing tool. This adapter includes a mounting plate with a mounting axis that is offset from the spider arm's rotational axis, allowing the tool to be mounted while preventing direct contact between the tool and the pivoting spider arm, thereby eliminating uneven wear
Solution Approach 2:
The mounting system is segmented into separate functional components: the spider arm for rotation, the offset mounting adapter for positioning, and the surface processing tool for operation. This segmentation allows each component to perform its specific function independently, with the adapter absorbing the pivoting motion and preventing it from transferring to the tool
2Adaptability or versatility
If the spider arm is allowed to pivot during operation, then the machine can adapt to surface variations, but the bearing binds and the tool wears unevenly
Solution Approach 1:
The offset mounting adapter serves as a mediator that decouples the spider arm's pivoting motion from the tool's operational stability. The adapter's offset mounting axis allows the spider arm to pivot for surface adaptation while the tool remains stable and properly oriented on the concrete surface
Solution Approach 2:
The mounting axis is positioned in a different dimensional location (offset circumferentially behind the trailing side) rather than directly beneath the spider arm. This dimensional change creates a geometric relationship that prevents the pivoting motion from causing uneven wear while maintaining surface contact capability
3Loss of time
If conventional mounting means are used to rapidly substitute tools, then tool changes can be made quickly, but the tools are subject to uneven wear patterns
Solution Approach 1:
The offset mounting adapter provides a universal mounting interface that can accommodate various surface processing tools (brushes, burnishers, grinders, polishers) while consistently providing the offset positioning benefit. This universal design allows rapid tool substitution while maintaining uniform wear characteristics across different tool types
Solution Approach 2:
The adapter acts as a permanent intermediary in the tool mounting system that ensures all tools, regardless of type, are positioned with the correct offset to prevent uneven wear, while still allowing quick tool changes through standard mounting mechanisms
Data Source
AI summary
A mounting adapter for mounting a surface processing tool having a rotational or longitudinal axis to at least one spider arm of a rotatable spider assembly of a surface processing apparatus, the spider arm having a leading side and a trailing side as a function of the direction of rotation of the spider assembly. The mounting adapter has a first element for removably attaching the adapter to the spider arm and a second element positioned circumferentially offset behind the first element for positioning the rotational or longitudinal axis of a surface processing tool circumferentially offset behind the trailing side of the spider arm. The first element is an elongate apertured bar and the second element is weld filler material, the bar being connected to said surface processing tool via the weld filler material.