Work Machine Towing Attachment With Winch-Pulley Force Control
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Solution Overview
Problem
Towing large vehicles stuck in soft ground poses risks due to sudden load application and potential damage to vehicles and towing devices, requiring a safe and controlled towing method.
Innovation Solution
A towing attachment for working machines, featuring a winch, movable pulley unit, and wire fixing system that amplifies towing force, allowing controlled and safe operation with hydraulic or electric power, and includes a protective design to prevent debris scattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a towing vehicle is used to pull out a large vehicle stuck in soft ground, then the large vehicle can be towed, but sudden load application may cause damage to vehicle bodies and towing devices
Solution Approach 1:
The patent applies beforehand cushioning by introducing a winch system that can gradually build towing force. The winch winds a wire rope around a drum, allowing controlled, progressive tensioning rather than sudden force application. This gradual force buildup cushions the shock that would otherwise damage vehicle bodies and towing devices when a large vehicle is pulled from soft ground.
Solution Approach 2:
The patent uses an intermediary mechanism - the winch system with wire rope and drum - between the towing vehicle and the stuck large vehicle. This intermediary allows controlled force transmission and gradual load application, mediating the interaction between the two vehicles to prevent sudden shock loads that could cause damage.
2Productivity
If maximum driving force is applied from the start to quickly tow the large vehicle, then towing speed increases, but the large vehicle may move forward too much and hit the rear of the towing vehicle
Solution Approach 1:
The patent implements feedback control through the winch system, where the operator can monitor the towing process and adjust the wire rope winding speed and tension accordingly. This feedback mechanism allows the operator to sense when the large vehicle is moving and adjust the force application to prevent it from moving forward too much and hitting the towing vehicle, while still maintaining efficient towing speed.
Solution Approach 2:
The patent applies dynamics by making the towing force adjustable and controllable during the operation. The winch system allows the operator to dynamically adjust the force being applied based on the actual towing conditions, enabling both quick towing when appropriate and controlled force reduction when the large vehicle begins to move, thus preventing collision while maintaining productivity.
3Loss of time
If a towing vehicle is stationed at the farm field at all times to quickly rescue stuck vehicles, then rescue time is reduced, but operational costs and resource requirements increase
Solution Approach 1:
The patent applies universality by designing a towing attachment that can be mounted on various types of working machines (tractors, wheel loaders, etc.). This multi-functional attachment allows any of these vehicles to perform towing operations, eliminating the need for a dedicated towing vehicle to be stationed at the farm field. The attachment transforms ordinary working machines into capable rescue vehicles, reducing both rescue time and operational costs.
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 safe and efficient towing of large vehicles by controlling towing force and preventing damage, with the ability to amplify pulling force and provide a clear field of view for operators, reducing the risk of accidents and equipment damage.
Implementation Method 1
a movable pulley unit provided with a hook for connecting to a towing-target object and at least one movable pulley; and a wire fixing unit provided on the body frame so as to fix a leading end of a wire that is pulled out from the winch, wherein the wire is wound on a movable pulley in the movable pulley unit between the winch and the wire fixing unit
Data Source
AI summary
Provided is a tow attachment that can be installed on a work machine as an attachment for towing a tow object. This tow attachment installable as a work machine attachment for towing a tow object is provided with: a body frame; a winch fixed on the body frame; a coupling part which is provided to the body frame so as to be mounted on the work machine; a movable pulley part which is equipped with a hook for coupling to the tow object and at least one movable pulley; and a wire fixing part which is provided to the body frame in order to fix a leading end of a wire that is let out of the winch, wherein the wire is applied on the movable pulley of the movable pulley part between the winch and the wire fixing part.