Telescopic Support Leg Lever Mechanism for Mobile Concrete Pumps
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Solution Overview
Problem
Mobile work machines, such as concrete pumps, face challenges in stabilizing and easily handling their support legs during setup and swiveling processes, which affects their operational stability and safety.
Innovation Solution
The support legs are designed as a two-armed lever with a pivot axis, featuring a gas pressure spring for stable stop positions and an inclined foot plate, along with a locking mechanism for secure deployment, allowing for easier handling and improved force distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the support legs are designed with a simple pivot mechanism, then the device complexity is reduced, but the ease of operation deteriorates due to difficulty in handling during swiveling
Solution Approach 1:
A guide link is introduced as an intermediary element between the extension tube and the chassis. The guide link includes a guide surface that cooperates with a corresponding surface on the extension tube, providing guided movement during swiveling and reducing handling difficulty without significantly increasing overall system complexity
Solution Approach 2:
The swiveling guidance function is extracted from the main pivot mechanism and implemented separately through the guide link and guide surface arrangement. This allows the pivot mechanism to focus on rotation while the guide link handles the guidance, improving ease of operation with minimal added complexity
2Stability of the object's composition
If the support legs use a telescopic foot part with hydraulic means, then the stability is improved, but the device complexity increases
Solution Approach 1:
The support leg is segmented into multiple functional parts: the extension tube for lateral movement, the telescopic foot part for vertical adjustment, and the guide link for swiveling guidance. This segmentation allows each part to perform its specific function efficiently, improving overall stability while keeping the complexity manageable through modular design
Solution Approach 2:
The foot part is designed to be telescopically extendable and retractable, providing dynamic adjustment of the support leg length. This dynamic capability allows the support leg to adapt to different ground conditions, improving stability without requiring a completely rigid and complex structure
3Force
If the upper lever arm engages in a guide link with end stop, then the force derivation is improved, but the device complexity increases
Solution Approach 1:
The guide link is merged with the lever arm mechanism, with the guide link serving dual purposes: guiding the swiveling motion and providing the end stop for the upper lever arm. This integration improves force derivation by ensuring proper load paths while minimizing additional complexity through combined functionality
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
This design enhances the ease of handling and stability of support legs, ensuring secure engagement with the ground and improved operational safety by facilitating easier pivoting and locking mechanisms, thus improving the overall setup process of mobile work machines.
Implementation Method 1
a compression spring, preferably designed as a gas pressure spring, acts on the upper lever arm of the extension tube
Implementation Method 2
a foot part that can be extended telescopically downwards, preferably with hydraulic means
Data Source
Figure 1a~1b
Figure 2
Figure 3a~3b
AI summary
The invention relates to a mobile machine, in particular a truck-mounted concrete pump. The machine comprises a chassis (10) which has at least four wheels (11) belonging in pairs to a wheel axle. Furthermore, at least two supporting legs (20) arranged in pairs laterally on the chassis are provided, said supporting legs (20) having a telescopic segment, linked to the chassis (10) and designed as a push-out tube (28), and a foot part (24) which can be extended telescopically downwards preferably by hydraulic means and can be supported on the ground. In order to ensure simple manipulation of the supporting mechanism, it is proposed according to the invention that the push-out tube (28) of the supporting legs (20) be designed like a two-armed lever while forming a, with respect to the swivel axis (34), bottom lever arm (40) containing the foot part (24) and a top lever arm (42) preferably spring-assisted in the swing-out direction.