Wheel Loader Lifting Arrangement with Movable Support
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Solution Overview
Problem
Construction machines with lifting arrangements face limitations in lifting capacity due to weight distribution and stability issues, which affect operational efficiency and require increased machine weight, leading to decreased drivability and efficiency.
Innovation Solution
A lifting arrangement with a main arm and auxiliary actuating elements, supported by a movable main arm support means, allows for a predetermined path of the equipment connector, reducing tilting moment and increasing lifting capacity without compromising efficiency, by enabling a path that deviates from a circular path and maintaining stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the total weight of the construction machine is increased to enhance lifting capacity, then the lifting capacity is improved, but the drivability and overall efficiency deteriorate
Solution Approach 1:
The invention changes the geometric parameters of the lifting arrangement by introducing a movable main arm support means that allows the main arm to deviate from a fixed circular path. This parameter change enables the equipment connector to follow a predetermined path that reduces the tilting moment, thereby improving lifting capacity without increasing machine weight
Solution Approach 2:
The main arm support means is made movable rather than fixed, allowing dynamic adjustment of the main arm's pivot point position. This dynamics enables the system to adapt the lifting path in real-time to optimize the tilting moment characteristics, resolving the contradiction between lifting capacity and machine weight
2Force
If variations in weight distribution are made to enhance lifting capacity, then the lifting capacity is improved, but the drivability deteriorates
Solution Approach 1:
Instead of changing weight distribution parameters, the invention changes the geometric and kinematic parameters of the lifting arrangement. The movable main arm support means alters the path of the equipment connector to reduce tilting moment, achieving improved lifting capacity without affecting the machine's weight distribution or drivability
3Force
If a predetermined path deviating from circular path is implemented, then the tilting moment is reduced and lifting capacity increased, but the device complexity increases
Solution Approach 1:
The lifting arrangement is segmented into distinct functional components: the main arm, the movable main arm support means, and the equipment connector. This segmentation allows the complex function of path control to be distributed across separate elements, making the system more manageable and easier to implement despite the increased functionality required
Solution Approach 2:
The main arm support means acts as an intermediary element between the fixed frame and the main arm. By making this intermediary movable, the system achieves predetermined path control without requiring complex direct control mechanisms, thereby limiting the increase in device complexity
Data Source
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AI summary
A lifting arrangement for a construction machine is provided which includes a main arm (3) which is provided with a pivot connector (4). The pivot connector (4) is pivotably supported on a main arm support means (6). The main arm support means (6) is moveable in a direction which includes at least a component in the front-rear direction with respect to a frame arrangement of a construction machine to which the lifting arrangement can be applied. Based on a control of a main arm actuating element (11) and an auxiliary actuating element (21), a path of an equipment connector (5) upon moving said main arm (3) between a lowered position and a lifted position can be achieved which follows a predetermined path.