Loading Machine Anti-Lock Braking and Suspension
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Solution Overview
Problem
Conventional loading machines are limited to slow speeds for ground travel, making them inefficient for moving between locations, and require improved suspension and braking systems to facilitate higher speeds.
Innovation Solution
A wheeled loading machine equipped with a non-reactive suspension system and four-wheel anti-locking brakes, featuring a braking system that includes wheel speed sensors and a controller to modulate hydraulic fluid pressure for effective braking, allowing for high-speed travel without skidding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional loading machines travel over ground, then they can move between work locations, but they are limited to slow speeds around 30 km per hour which is overly slow for road travel
Solution Approach 1:
The brake control system incorporates wheel speed sensors that continuously monitor wheel rotation speed and provide feedback to a controller. The controller processes this feedback to detect skidding conditions and automatically modulates brake pressure accordingly, enabling reliable high-speed travel through active feedback control
Solution Approach 2:
The patent replaces conventional mechanical brake systems with an electronically controlled braking system that uses sensors, controllers, and hydraulic actuators. This substitution enables precise modulation of brake pressure based on real-time wheel speed data, providing superior traction control at high speeds
2Speed
If suspension is added to facilitate high speed travel, then the machine can travel faster over ground, but the device complexity increases
Solution Approach 1:
The suspension system is segmented into independent components for each wheel, with each wheel having its own suspension assembly. This segmentation allows the complex suspension function to be distributed across multiple simple, identical modules, making the overall system more manageable and maintainable
Solution Approach 2:
The suspension system incorporates dynamic elements including damping struts that actively damp axle movements, and non-reactive suspension design that allows vertical load and traction to vary independently of driving torque. This dynamic design enables high-speed travel comfort and stability
3Reliability
If four wheel anti-locking brakes with wheel speed sensors and pressure modulation are implemented, then skidding is prevented during high speed braking, but the device complexity increases
Solution Approach 1:
The brake control system uses wheel speed sensors to continuously monitor wheel rotation and provide feedback to a controller. The controller processes this feedback to detect skidding conditions and automatically modulates brake pressure, implementing reliable anti-lock braking through feedback control
Solution Approach 2:
The system uses hydraulic fluid pressure actuated by air-hydraulic actuators to apply and modulate brake pressure. This pneumatic-hydraulic combination enables precise and rapid pressure modulation for effective anti-lock braking control
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 high-speed travel over ground, reducing the need for transporting the machine between work locations by maintaining traction and stability through advanced suspension and braking technology.
Implementation Method 1
the suspension includes for the at least one axle, damping struts to damp axle movements
Implementation Method 2
The braking devices for applying braking to each of the wheels, may be operated to apply the brake by hydraulic fluid pressurised by an air-hydraulic actuator
Implementation Method 3
the brake control system includes for each wheel, a wheel speed sensor, the brake control system also including a controller responsive to wheel speed signals from each of the wheel speed sensors
Data Source
AI summary
A wheeled loading machine includes a body mounting a loading arm, a ground engaging structure including a front axle which carries a front pair of ground engaging wheels and a rear axle which carries a rear pair of ground engaging wheels, the loading arm being mounted at a position towards a rear of the machine for up and down movement about a generally horizontal axis, and the loading arm extending forwardly beside a cab which is mounted at one side of the body, to an outermost end which is beyond a front of the body, and the loading arm having at its outermost end a mounting for a loading implement and the arm being extendible to vary the length of the loading arm, and each axle being suspended from the body by a respective suspension, each of the ground engaging wheels being drivable by an engine of the machine through a mechanical transmission, and the machine including a braking system for braking each wheel, the braking system including a brake control system which provides a brake anti-locking function to resist any braked ground engaging wheel skidding relative to the ground as a result of becoming locked during braking when a low friction condition exists between the wheel and the ground.