Extendable Mast Linear Drive with Temporary Locking
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Solution Overview
Problem
Existing construction devices with extendable masts require high power to extend the mast and drilling carriage simultaneously, leading to inefficiencies in energy usage and operational versatility.
Innovation Solution
A construction device with an extendable mast featuring a linear drive system where the upper drive part is attached to the upper mast element, allowing temporary fixation to the lower mast element for extension and retraction, then releasing for other lifting tasks, enabling the same linear drive to be used for both mast extension and carriage movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the mast cylinder is connected to the lower mast element and the feed cylinder is connected to the mast cylinder, then the mast can be extended and the drilling carriage can be moved, but high power is required to extend the mast and drilling carriage simultaneously
Solution Approach 1:
The lower drive part of the linear drive is designed to be temporarily fixable and releasable from the lower mast element. During mast extension, it is fixed to transmit compressive forces. After extension, it is released to allow the linear drive to perform lifting tasks, dynamically changing the system's operational mode to reduce power requirements.
Solution Approach 2:
The linear drive is designed to perform multiple functions: extending the mast and subsequently lifting the drilling carriage. By making the lower drive part temporarily fixable and releasable, the same linear drive unit can serve different purposes at different times, eliminating the need for separate drives and reducing overall power consumption.
2Ease of operation
If separate drives are used for mast extension and carriage movement, then each function can be performed independently, but device complexity increases
Solution Approach 1:
A single linear drive with a temporarily fixable lower drive part is used to perform both mast extension and carriage lifting functions. This multi-functional approach reduces the number of drive components while maintaining operational independence through the fixable/releasable mechanism.
Solution Approach 2:
The lower drive part is temporarily fixed during mast extension and then released for carriage lifting. This temporary fixation and subsequent release allows one drive component to sequentially perform multiple tasks, reducing overall system complexity while maintaining functional independence.
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 configuration enhances economic efficiency and versatility by allowing the linear drive to be used for lifting tasks after mast extension, eliminating the need for separate drives and reducing energy consumption.
Implementation Method 1
The temporary fastening of the lower drive part to the lower mast element, which is produced by means of the fastening device, allows the compressive forces that act in the linear drive when the mast elements are extended and retracted to be transmitted to the lower mast element
Implementation Method 2
once the displacement process of the two mast elements has ended, the mast elements can be fixed relative to one another by means of the locking device, ie the upper mast element is then carried by the locking device
Data Source
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AI summary
The invention relates to a construction work device with an extendable mast comprising an upper mast element (2) and a lower mast element (3), wherein the upper mast element is longitudinally displaceable relative to the lower mast element. The device according to the invention is designed with a linear drive (10) for displacing the two mast elements relative to each other, wherein the linear drive has an upper drive part (12) which is linearly actuated relative to a lower drive part (13) of the linear drive, and with a locking device for locking the two mast elements in an extended mast position.According to the invention, the upper drive part of the linear drive is attached to the upper mast element, the lower drive part of the linear drive is displaceable along the lower mast element, and a locking device (30) is provided on the lower mast element with which the lower drive part of the linear drive can be detachably locked to the lower mast element for moving the upper mast element.