Steering Shaft Vibration Isolation for Working Vehicles
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Solution Overview
Problem
Conventional steering wheel vibration-isolating devices for working vehicles fail to effectively suppress vibrations transmitted from the wheel steering mechanism to the steering wheel, leading to uncomfortable maneuverability due to inadequate vibration isolation.
Innovation Solution
A vibration-isolating device with a connecting mechanism that disconnects the first and second steering shafts within specific rotation angles for linear driving, preventing vibration transmission, and interlocks them via a vibration-isolating rubber member during turns to suppress vibration, using engage members and rubber isolators to manage rotational displacement and absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the steering shaft is supported in a vibration-isolating manner only with respect to the steering post, then the steering shaft can be supported stably, but vibration transmitted from the wheel steering mechanism to the steering wheel cannot be blocked
Solution Approach 1:
The steering shaft is divided into two separate shafts: a first steering shaft connected to the steering wheel and a second steering shaft connected to the wheel steering mechanism. These shafts are disconnected from each other to prevent vibration transmission, while each shaft is independently supported. This segmentation allows the system to maintain structural stability while blocking harmful vibration transmission paths.
2Productivity
If the first and second steering shafts are interlocked via a rigid connecting mechanism, then rotational displacement can be transmitted efficiently, but vibration from the wheel steering mechanism is transmitted to the steering wheel
Solution Approach 1:
A rubber member is introduced as an intermediary connecting element between the first and second steering shafts. This rubber member allows rotational displacement to be transmitted when needed (during turning operations) while simultaneously absorbing and isolating vibrations. The elastic properties of the rubber member enable it to function as both a connector and a vibration damper, resolving the contradiction between efficient power transmission and vibration isolation.
3Object-affected harmful factors
If the steering shafts are completely disconnected, then vibration transmission is blocked, but rotational displacement cannot be transmitted during turns
Solution Approach 1:
The connecting mechanism between the first and second steering shafts is designed to be dynamic rather than static. The rubber member allows the connection to engage and disengage based on operational conditions: during linear driving, the shafts remain effectively disconnected to block vibrations; during turning operations, the rubber member allows rotational displacement transmission. This dynamic behavior enables the system to adapt its connectivity based on the steering state, maintaining both vibration isolation and operational functionality.
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
Effectively blocks or suppresses vibration transmission to the steering wheel, enhancing comfort and maneuverability by isolating vibrations during linear driving and reducing their impact during turns.
Implementation Method 1
a vibration-isolating connecting mechanism that operatively connects the first steering shaft and the second steering shaft to each other... the transmission of vibration from the second steering shaft to the first steering shaft is suppressed
Implementation Method 2
at least one engage member connected to one of the first and second steering shafts, at least one opposite engage member connected to the other one of the first and second steering shafts, and a vibration-isolating rubber member disposed between the engage member and the opposite engage member
Data Source
AI summary
A vibration-isolating device for a steering wheel of a travelling working vehicle equipped with a wheel steering mechanism includes a first steering shaft (32) that transmits rotational displacement, the first steering shaft being operatively connected to the steering wheel (7); a second steering shaft (33) that transmits rotational displacement, the second steering shaft being operatively connected to the wheel steering mechanism (P, 23); and a vibration-isolating connecting mechanism (31) that operatively connects the first steering shaft (32) and the second steering shaft (33) to each other so that rotational displacement can be transmitted. When the angles of rotational displacement of the first steering shaft (32) and the second steering shaft (33) are within ranges of rotation angles for linearly driving the vehicle, rotational displacement cannot be transmitted between the first steering shaft (32) and the second steering shaft (33).