Cab Mount Structure With Gapped Radial Displacement Regulation
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Solution Overview
Problem
Conventional cab mounts experience a deterioration in vibration damping performance when large loads cause significant radial displacement of outer and inner cylinders, due to regulation by a regulation member.
Innovation Solution
A cab mount design featuring an outer cylinder, inner cylinder, body rubber, and a regulation member that protrudes inward in the radial direction with a gap, allowing regulation of relative displacement without affecting vibration damping performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a regulation member is provided between outer and inner cylinders to regulate radial displacement under large load, then displacement regulation is improved, but vibration damping performance deteriorates
Solution Approach 1:
The regulation member is designed to dynamically interact with the inner cylinder based on operating conditions. During normal vibration, the gap allows free movement and damping. Under large radial load, the inner cylinder contacts the regulation member which then provides displacement regulation. This dynamic behavior resolves the contradiction by adapting the regulation function to actual needs.
Solution Approach 2:
The regulation member acts as an intermediary element between the outer and inner cylinders. It provides a controlled interaction mechanism that only engages when necessary (under large load), allowing the body rubber to perform its vibration damping function during normal operation while still providing displacement limits when needed.
2Stability of the object's composition
If the regulation member contacts the inner cylinder to regulate displacement, then displacement control is improved, but the gap needed for vibration damping is reduced
Solution Approach 1:
The system transitions from a static fixed-gap design to a dynamic system where the gap is maintained during normal operation but closed under large load. The regulation member's position is designed to be non-contacting during vibration but contacting during extreme displacement, allowing both functions to coexist through conditional engagement.
Solution Approach 2:
Instead of maintaining continuous contact for full displacement control, the regulation member provides partial action only when exceeded displacement occurs. The gap is maintained as the normal state for vibration damping, with contact occurring only as an excessive action under large load conditions.
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
Regulates radial displacement effectively while maintaining vibration damping performance during normal driving conditions.
Implementation Method 1
body rubber configured to connect between an inner peripheral surface of the outer cylinder and an outer peripheral surface of the inner cylinder with each other
Data Source
AI summary
A cab mount 1 includes an outer cylinder 11 configured to be attached to a vehicle body frame F, an inner cylinder 12 configured to be inserted inside the outer cylinder and attached to a cab C, body rubber 13 configured to connect between an inner peripheral surface of the outer cylinder and an outer peripheral surface of the inner cylinder with each other, and a regulation member 14 that is configured to be attached to an upper end opening edge of the outer cylinder, and provided so as to protrude inward in a radial direction than the inner peripheral surface of the outer cylinder and to leave a gap in the radial direction between the regulation member and the outer peripheral surface of the inner cylinder.