Collapsible Log Lifting Apparatus with Hydraulic Pivoting
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Solution Overview
Problem
Existing log lifting and forwarding apparatuses are either inefficient for portable use due to large dimensions and complexity, making them non-portable and fixed, or lack the capability to simultaneously lift and longitudinally move logs efficiently.
Innovation Solution
A collapsible apparatus with a bearing frame, crosswise arranged legs, pivoting levers, and hydraulic transposing means that allows for efficient lifting and forwarding of logs by transforming between a stable operating state and a transportable collapsed state, enabling portable use and simultaneous longitudinal movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed apparatus with multiple step-like segments is used for log transport, then log transport efficiency is improved, but device portability deteriorates
Solution Approach 1:
The apparatus is divided into multiple step-like segments that can be arranged in groups, with each segment capable of independent rotation around a transverse axis. This segmentation allows the apparatus to maintain transport efficiency while enabling compact configuration for portability.
Solution Approach 2:
The apparatus employs dynamic pivoting mechanisms where each group of segments can be pivoted for a required angle, transforming the structure between an extended operational state for efficient log transport and a collapsed compact state for portable storage and transport.
2Productivity
If a complex apparatus with multiple pivoting groups is used, then log forwarding capability is improved, but device simplicity deteriorates
Solution Approach 1:
Multiple functional elements are merged into integrated components: the bearing frame combines support and rotation functions, the segments combine log support and forwarding functions, and the pivoting mechanism combines positioning and compacting functions. This merging reduces the number of separate components while maintaining advanced log forwarding capability.
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a portable and collapsible apparatus, which is intended for lifting of logs from the ground to a desired level, where the logs are then longitudinally split, and also for forwarding of said logs in a longitudinal direction; said apparatus comprises two groups (2, 3) crosswise settable legs (20, 30), where appropriate arms (20') are attached to legs (20) of the first group (2) at their ends, which are faced away from the ground, furthermore a bearing frame (1), which is connected at the one hand with the ends of the legs (30), which are faced away from the ground, and on the other hand with said arms (20'), and equipped with transversally oriented rollers (3) and with at least one forwarding means (14', 14"), and moreover a lifting unit (4), which is pivotally connected with the first group (2) of legs (20) and supported by a hydraulic transposing means (40), which is attached to the second group (3) of legs (30).