Hydraulic Locking Device for Lifting Arm Safety
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Solution Overview
Problem
Existing hydraulic safety devices for lifting arms on road carrier frames fail to securely manage the tipping and loading/unloading phases of caissons, as they lack efficient mechanisms to simultaneously disconnect and reconnect the tipper, connecting rod, and rocker during these operations.
Innovation Solution
A hydraulic safety device with a first locking stop on the frame, a second locking abutment on the rocker, and a double-acting cylinder that controls the rotation of the main shaft and hook, allowing for simultaneous locking and unlocking of the rocker and connecting rod relative to the chassis, enabling secure tipping and loading/unloading maneuvers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hydraulic safety device is implemented to securely manage tipping and loading phases, then operational safety is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple locking functions into a single integrated hydraulic device. The first locking stop (10) and second locking abutment (13) are controlled by a common hydraulic cylinder (16), allowing simultaneous locking/unlocking of the rocker (3) and connecting rod (4) through unified hydraulic actuation, thereby improving safety while managing complexity through functional integration
Solution Approach 2:
The hydraulic cylinder (16) serves multiple functions: it controls the main shaft (12) rotation via the structure (18) to engage/disengage the first locking stop (10), and simultaneously controls the hook (14) pivoting via the connecting rod (19) to engage/disengage the second locking abutment (13). This multi-functionality improves operational safety across different phases (tipping and loading/unloading) while avoiding the need for separate control systems
2Productivity
If simultaneous locking and unlocking mechanisms are added to control rocker and connecting rod, then operational efficiency is improved, but device complexity increases
Solution Approach 1:
The patent merges the control of two separate locking mechanisms into a single hydraulic system. The hydraulic cylinder (16) with its rod (17) simultaneously actuates the structure (18) connected to the main shaft (12) and the connecting rod (19) connected to the hook (14), enabling coordinated locking/unlocking of both the rocker (3) and connecting rod (4) during tipping and loading/unloading operations, thereby improving operational efficiency through synchronized action
Solution Approach 2:
The structure (18) acts as an intermediary mechanism that translates the linear motion of the hydraulic cylinder rod (17) into rotational motion of the main shaft (12) to control the first locking stop (10). Similarly, the connecting rod (19) mediates between the hydraulic cylinder (16) and the hook (14) to control the second locking abutment (13). These intermediary elements enable efficient simultaneous control while maintaining manageable device complexity through mechanical advantage
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
The device ensures secure disconnection and reconnection of the tipper and chassis during tipping and loading/unloading phases, enhancing operational safety and efficiency by controlling the pivoting and locking mechanisms through the hydraulic cylinder's directional action.
Implementation Method 1
a double-acting cylinder actuating by its rod a structure capable of causing rotation of the main shaft on itself in one direction or in the opposite direction depending on whether the rod of the cylinder is extended or retracted
Data Source
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Figure 5
AI summary
The device has locking stops (10, 13) fixed on a frame and a tipper to cooperate with a main shaft (12) and a hook (14), respectively, where the hook is pivoted on a transversal axle (15) of a connecting rod. A double acting cylinder (16) actuates a structure (18) controlling the rotation of the shaft by a rod (17). The connecting rod is articulated to the structure and hook at its ends, respectively. The cylinder controls the unblocking of the tipper based on a displacement direction of the connecting rod or blocking of the tipper on the frame and unblocking of the connecting rod.