Compact Loader Arm Path for Vertical Lift and Wide Tracks
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Solution Overview
Problem
Current compact utility loaders have large operating footprints and narrow tracks, making them difficult to maneuver and affecting load distribution, particularly on soft ground, and lack improved loader arm configurations and operator functionalities.
Innovation Solution
A compact utility loader design with a frame having a smaller lower portion width than the upper portion, featuring oversized tracks at least 7.5 inches wide, a vertical-lift loader arm configuration, and a keyless start mechanism with a graphic display requiring a passcode for engine operation, along with enhanced loader arm attachments and control interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the loader width is reduced to improve maneuverability, then the operating footprint is reduced, but the track width must be reduced which worsens load distribution on soft ground
Solution Approach 1:
The frame is designed with non-uniform width distribution: the upper portion width is greater than the lower portion width. This allows the loader to have a narrow lower profile for maneuverability while maintaining sufficient overall width to accommodate wide tracks (at least 7.5 inches) for proper load distribution. The differentiated frame width creates space for both narrow track spacing and wide track dimensions.
Solution Approach 2:
Instead of solving the width conflict in the horizontal plane only, the invention uses vertical dimension by having the frame upper portion extend wider than the lower portion. This three-dimensional frame configuration allows wide tracks to be positioned on the wider upper portion while maintaining narrow overall loader width for maneuverability.
2Object-affected harmful factors
If oversized tracks are used to improve load distribution, then the track width is increased, but the overall loader width increases which reduces maneuverability
Solution Approach 1:
The frame width varies at different heights: the upper portion is wider to accommodate wide tracks for load distribution, while the lower portion is narrower for maneuverability. This localized width differentiation allows each portion of the frame to optimize for its specific function.
3Device complexity
If a traditional loader arm configuration is used, then the structure is simpler, but the operational capabilities and precision are reduced
Solution Approach 1:
The loader arm configuration uses a vertical-lift design where the hitch pin follows a controlled curved path (f(x)=4.641e0.34x) during raising and lowering operations. This dynamic path control provides precise operational capability while maintaining a relatively simple mechanical structure through the use of a hitch plate and hitch pin system.
Data Source
AI summary
A compact utility loader compact utility loader comprising a frame, a first track and a second track positioned on either side of the frame, and a pair of loader arms. The loader arms are configured to couple with an attachment via a hitch plate and a hitch pin. The compact utility loader is configured such that as the loader arms are raised and lowered, the hitch pin follows a path approximately defined by a curve f(x)=4.641e0.34x The value “x” represents a horizontal direction and the function f(x) represents a vertical direction.