Raked Blade Load Clamp for Lift Truck Carton Handling
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Solution Overview
Problem
Existing carton clamps for lift trucks are ineffective in grasping a single carton in a row or against a wall due to their design, which requires precise alignment and struggles with frictional engagement.
Innovation Solution
The raked blade load clamp design features adjustable clamp arms with a raked leading edge and replaceable wear components, allowing for lateral adjustment and improved frictional engagement between the clamp and the load, enabling better grip between cartons or against a wall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If standard clamp arms are used with vertical leading edges, then the clamp structure is simple, but the clamp cannot effectively grasp cartons in tight spaces or against walls
Solution Approach 1:
The clamp arm leading edge is designed with an asymmetric raked configuration that angles backward from the vertical, creating a blade-like surface. This asymmetric geometry enables the clamp to effectively grasp cartons in tight spaces by sliding the raked edge between the target carton and adjacent cartons or walls, while maintaining a relatively simple overall clamp structure.
2Ease of operation
If clamp arms require precise alignment to grasp cartons, then the gripping force is sufficient, but the operation becomes difficult in tight spaces
Solution Approach 1:
The raked leading edge of the clamp arm performs a preliminary sliding action that automatically positions and aligns the clamp with the target carton before the gripping phase. By sliding the raked edge between the carton and adjacent objects, the system preliminarily establishes the correct alignment, eliminating the need for precise manual alignment by the operator.
3Force
If the clamp uses high friction contact surfaces, then the gripping force is improved, but the wear on the clamp components increases
Solution Approach 1:
The clamp arm is segmented into a permanent structural portion and a replaceable wear portion. The replaceable wear portion contains the high-friction gripping surface that contacts the cartons, allowing this component to be replaced when worn, while the permanent structure remains in use. This segmentation maintains high gripping force through friction while extending the overall clamp lifespan by enabling component replacement.
4Strength
If the clamp arms are made robust for heavy-duty use, then the strength is sufficient, but the wear components become harder to replace
Solution Approach 1:
The clamp arm is divided into a robust permanent structure that provides the necessary strength for heavy-duty use, and a separate replaceable wear portion that can be easily removed and replaced. This segmentation allows the permanent structure to maintain high strength while the wear portion is designed for ease of replacement, solving the contradiction between robustness and maintainability.
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 secure lifting and maneuvering of cartons in tight spaces without damaging them, with easily replaceable wear components extending the clamp's lifespan.
Implementation Method 1
The clamp pad 110 comprises a high friction, compressible and resilient material, such as rubber or polyurethane
Implementation Method 2
The clamp pad 110 comprises a high friction, compressible and resilient material, such as rubber or polyurethane
Data Source
AI summary
A clamp assembly for a lift truck load handler that has a clamp leading edge that is raked back from bottom to top. The clamp leading edge is a blade edge, angled inward from the leading edge. The clamp assembly typically has a clamp plate with a front edge that forms at least part of the clamp leading edge. The clamp assembly typically has a toe plate that is harder and more wear-resistant than the clamp plate that wraps around a front edge of a lower portion of the clamp plate. The toe plate has a front edge that aligns with a front edge of the upper portion the clamp plate that together form the clamp leading edge.