Telehandler Boom Locking Mechanism Prevents Stem Slippage Under Load
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Solution Overview
Problem
Existing handling systems for telehandler booms are prone to mechanical damage due to the risk of the stem slipping beyond the extended position, especially when handling high loads, as the stem position is not locked in the retracted or extended positions.
Innovation Solution
A handling system with a locking element that rotates between two angular positions to lock the stem in either the extended or retracted position, preventing slippage and minimizing damage by using a cylinder, stem, lever, and locking element connected via a connecting element to transmit rotational movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple cylinder-stem handling system is used without locking mechanisms, then the device complexity is reduced, but the reliability deteriorates due to the risk of stem slippage and mechanical damage
Solution Approach 1:
The locking element is positioned in advance at specific angular positions (first and second positions) to prevent stem slippage before it occurs. The stop portions are pre-configured on the boom to engage with the locking element at critical positions, ensuring the stem cannot slip beyond the extended or retracted positions even under high load conditions.
2Productivity
If high loads are handled by the boom and operative tool, then the productivity and capability are improved, but the harmful factors increase due to higher stresses on the stem causing greater risk of slippage and damage
Solution Approach 1:
The locking element and stop portions create a preliminary counteracting force against the stem slippage caused by high loads. When the stem experiences stress from heavy loads, the locking element engages with the stop portions to provide an opposing force that prevents the stem from slipping beyond its intended positions, thereby eliminating the harmful effect of load-induced slippage.
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 system effectively prevents stem slippage, reducing mechanical damage to the boom and its components, even under high load conditions, by ensuring the stem remains securely positioned within the cylinder.
Implementation Method 1
a locking element (14) rotatable between a first angular position, in which it is adapted to lock the stem (12) in the extended position, and a second angular position, in which it is adapted to lock the stem (12) in the retracted position
Implementation Method 2
a lever (13) adapted to convert the translation of the stem into a rotational movement
Implementation Method 3
a connecting element (17) operatively connecting the lever (13) to the locking element (14) and adapted to transmit to the locking element (14) a rotational movement of the lever (13)
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
Handling system for a boom (5) of a telehandler (1) comprising a cylinder (11) and a stem (12) adapted to slide within the cylinder (11) along a first direction (B); a lever (13) operatively connected to the stem (12) and adapted to rotate about a first axis (C) as a result of the sliding of the stem (12) within the cylinder (11); a locking element (14) is hinged to the boom (5) and operatively connected to the lever (13); the locking element (14) is rotatable between a first angular position, in which it is adapted to cooperate with a first stop portion of the boom (5) and to lock the stem (12) in an extended position with respect to the cylinder (11); and a second angular position different than the first angular position, in which it is adapted to cooperate with a second stop portion of the boom (5) and to lock the stem (12) in a retracted position with respect to the cylinder (11).