Manual Bolt Extractor Using Lever Force for Fast Machine Coupling
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Solution Overview
Problem
Manual insertion and extraction of bolts in working machines, such as cranes, is time-consuming due to the high forces required, and existing mechanical or hydraulic actuators are complex and prone to errors.
Innovation Solution
A system with a bolt extractor comprising a displaceable bolt and a rod connected to a bearing element, allowing manual insertion or extraction using a lever element, which applies force through leverage, eliminating the need for additional tools or actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual insertion/extraction of bolts is performed without assistance, then device complexity is reduced, but productivity decreases due to time-consuming operations
Solution Approach 1:
The system separates the bolt extractor into two independent parts: a simple manual extractor device and a separate lever element. This segmentation allows the extractor to remain simple while the lever provides mechanical advantage to increase operational speed and reduce effort.
Solution Approach 2:
The lever element acts as an intermediary between the operator and the bolt extractor. By inserting the lever into the bearing element, the operator can apply force with mechanical advantage, thereby increasing productivity without complicating the extractor itself.
2Ease of operation
If high forces are applied to insert/extract bolts manually, then ease of operation is reduced, but device complexity remains low
Solution Approach 1:
The system transitions from static manual force application to dynamic lever-based force multiplication. The lever element can be inserted at different positions along the bearing element to optimize mechanical advantage, making operation easier without requiring excessive force.
Solution Approach 2:
The lever element serves as a mechanical intermediary that transforms the operator's input force into higher output force on the bolt. This intermediary mechanism reduces the effort required while maintaining simplicity of the overall system.
3Productivity
If electric or hydraulic actuators are used for bolt insertion/extraction, then productivity increases, but device complexity and reliability worsen due to additional drive components
Solution Approach 1:
The system uses the operator's own physical effort combined with a simple lever mechanism to achieve the required force, eliminating the need for external power sources, actuators, or control systems. This self-service approach maintains high productivity while minimizing complexity.
Solution Approach 2:
The invention extracts the complex drive components (electric or hydraulic actuators) from the system and replaces them with a simple manual lever mechanism. This extraction of unnecessary complexity achieves the same functional result with far fewer parts and lower maintenance requirements.
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
Enables efficient and error-free manual bolt insertion and extraction with normal human force, reducing complexity and cost while maintaining high propulsive force.
Implementation Method 1
The lever element is supported on the counter-bearing element and pushes or pulls the rod along its longitudinal axis in one direction or the other by applying force (by a human operator) via the contacting of the bearing element. This allows the machine fitter to generate a very high propulsive force for the bolt with normal manual force via the lever arm.
Data Source
AI summary
The invention relates to a system for the manual insertion/extraction of bolts for connecting/disconnecting components of a working machine, comprising a bolt extractor, which comprises a displaceable bolt and a rod connected to the bolt or formed in one piece with a bearing element for manual movement of the bolt, as well as a counter-bearing element arranged on one of the components, wherein the bearing element and the counter-bearing element are designed as force application points for receiving a lever element and are arranged such that the rod can be displaced with the bolt by manual application of force to the lever element received in the bearing and counter-bearing elements, thereby enabling the components to be connected/disconnected. The invention also relates to a bolt extractor for a system according to the invention, a component, with a counter bearing and a bolt extractor as well as a working machine, with such a lattice piece.