Vehicle Clutch Unit Rotation Suppression Mechanism
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Solution Overview
Problem
The existing clutch unit for vehicles is prone to generating abnormal noise due to vibrations in the output side transmission member.
Innovation Solution
A clutch unit design that includes a rotation suppressing member to prevent co-rotation of the input side outer ring member during the return operation of the operation lever, using a wave washer or similar to apply a rotational resistance force greater than the co-rotating force, and a pressing force transmission portion to transmit this force to the output side transmission member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the output side transmission member is movably provided between the output side inner ring member and output side outer ring member, then the operation lever can return smoothly to the neutral position, but abnormal noise occurs due to vibration of the output side transmission member
Solution Approach 1:
A rotation suppressing member is introduced as an intermediary component between the input side outer ring member and the output side transmission member. This member applies a rotational resistance force to suppress co-rotation during the return operation, thereby reducing vibrations and abnormal noise while maintaining smooth operation lever return
Solution Approach 2:
The rotation suppressing member applies a preliminary rotational resistance force in advance during the return operation to prevent co-rotation of the input side outer ring member. This preliminary anti-action counteracts the harmful vibrations before they can propagate to the output side transmission member and generate abnormal noise
2Object-generated harmful factors
If a rotation suppressing member is added to apply rotational resistance force, then abnormal noise is suppressed, but the number of components increases
Solution Approach 1:
The rotation suppressing member is designed to perform multiple functions simultaneously: it suppresses co-rotation during return operation, reduces vibrations of the output side transmission member, and prevents abnormal noise. By consolidating these functions into a single component, the patent avoids excessive increase in component count while achieving noise suppression
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
This design effectively suppresses abnormal noise caused by vibrations in the output side transmission member without increasing the number of components, ensuring smooth operation and preventing rattling of the operation lever and output side clutch roller.
Implementation Method 1
a rotation suppressing member configured to urge the other member in the rotation axis direction and apply a rotational resistance force greater than a force for the co-rotating
Implementation Method 2
a pressing force transmission portion configured to transmit a force the rotation suppressing member urges in the rotation axis direction to the output side transmission member
Data Source
Figure 1
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AI summary
A clutch unit for a vehicle is provided with a rotation prevention member (53) which, in order to prevent co-rotation of an input-side outer ring member (52) caused by an input-side inner ring member (51) when an operation for returning an operation lever (21) to a neutral position occurs, biases the input-side outer ring member (52) in the rotational axis direction and imparts rotational resistance force that is greater than the force causing co-rotation. A release bracket (pressing force transmission part) (64), which transmits to an output-side clutch collar (65) the force with which the rotation prevention member (53) biases in the rotational axis direction, is provided on the input-side outer ring member (52).