Pendulum Joint Differential Braking for Oscillation Control
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Solution Overview
Problem
Existing pendulum joints in working machines experience prolonged oscillation during loading operations, necessitating waiting periods and requiring complex braking systems that increase size and complexity, while maintaining a slender design is desirable.
Innovation Solution
A pivot joint design with differential braking systems at the upper and lower pivot joints, where the lower joint has a higher braking force and the upper joint has a slim design, minimizing oscillation and size by using disc brakes and brake discs with adjustable forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If braking systems are added to reduce oscillation, then oscillation is reduced, but device complexity and size increase
Solution Approach 1:
The patent applies parameter changes by adjusting the braking force at different pivot joints through variable spring preloads. The upper pivot joint has a higher braking force to quickly reduce oscillation, while the lower pivot joint has a lower braking force to protect hydraulic lines. This differential parameter adjustment resolves the contradiction by achieving oscillation reduction without requiring overly complex braking systems throughout the entire structure.
Solution Approach 2:
The patent implements local quality by applying different braking characteristics to different parts of the pendulum joint system. The upper pivot joint (closer to the boom arm) receives stronger braking action, while the lower pivot joint (closer to the implement) receives gentler braking. This localized differentiation allows oscillation reduction where most needed while protecting sensitive components elsewhere, avoiding uniform complexity throughout the system.
2Stability of the object's composition
If strong braking is applied at both pivot joints, then oscillation is reduced, but stress on hydraulic lines and connections increases
Solution Approach 1:
The patent applies local quality by differentiating the braking force at each pivot joint location. The upper pivot joint experiences stronger braking to rapidly dampen oscillation, while the lower pivot joint experiences reduced braking force to minimize stress transmission to the hydraulic lines and their connections. This spatial differentiation of braking intensity directly resolves the contradiction between oscillation control and hydraulic system protection.
Solution Approach 2:
The patent uses the differential braking system as an intermediary mechanism that decouples the oscillation reduction function from the hydraulic line stress. By introducing variable braking forces at intermediate pivot points, the system can dampen oscillation without transmitting excessive stress to the hydraulic connections, effectively mediating between these two conflicting requirements.
3Stability of the object's composition
If braking systems are added to reduce oscillation, then oscillation is reduced, but the size of the pivot joint increases
Solution Approach 1:
The patent uses parameter changes by implementing adjustable spring preloads that control braking force without requiring large, fixed braking components. The variable spring mechanisms allow compact design while providing sufficient braking authority when needed, resolving the contradiction between oscillation reduction and maintaining a compact pivot joint size.
Solution Approach 2:
The patent applies dynamics by using spring-based braking systems that can dynamically adjust their force output based on operational conditions. This dynamic capability allows the braking system to be compact in size while delivering high braking forces when oscillation occurs, rather than requiring permanently large braking components that would increase the overall pivot joint volume.
4Ease of operation
If a slender pivot joint design is maintained, then ease of operation and transport are improved, but oscillation reduction capability is limited
Solution Approach 1:
The patent applies parameter changes through adjustable spring preloads that enable a slender pivot joint design to deliver high braking forces when needed. The variable spring mechanisms provide oscillation reduction capability within a compact form factor, resolving the contradiction between maintaining a slender design for ease of operation and providing sufficient oscillation control.
Solution Approach 2:
The patent uses dynamics by implementing spring-based braking systems that can dynamically generate high braking forces from compact components. This allows the pivot joint to maintain a slender, operation-friendly size while still providing effective oscillation reduction when pendulum movements occur, rather than requiring permanently large braking structures.
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
Optimally reduces oscillation and minimizes the overall size of the pivot joint, protecting hydraulic lines and their connections while allowing easy adjustment for various tools and maintaining a compact form.
Implementation Method 1
both pivot joints are each provided with a braking system
Data Source
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AI summary
A pivot joint for attaching hydraulically operated implements to a boom arm, comprising an upper pivot joint with an upper axis of rotation (D1) of an upper joint part (G1) and a lower pivot joint with a lower axis of rotation (D2) of a lower joint part (G2) extending perpendicular to the upper axis of rotation (D1). The upper axis of rotation (D1) is formed by two half-axles, each with an upper pivot bearing (2.1, 2.2), and the lower axis of rotation (D2) runs between two lower pivot bearings (3.1, 3.2). Hydraulic lines (1) for the implement are routed between the two upper pivot bearings (2.1, 2.2) at the upper pivot joint and pass outside one of the two lower pivot bearings (3.1, 3.2) at the lower pivot joint. It is proposed that both pivot joints be equipped with a braking system, and that the two braking systems can be adjusted to different braking forces by using different braking systems.