Ratchet Clutch Shutter Plate Switching Without Actuators
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Solution Overview
Problem
Existing ratchet type clutch devices require actuators and cam members, increasing their size and necessitating a need for a smaller-sized clutch device capable of switching between lock and one-way clutch modes.
Innovation Solution
A ratchet type clutch device with an inner ring and outer ring that includes claw members and a shutter plate biased by an elastic member, allowing mode switching without actuators or cam members, utilizing centrifugal force to transition between lock and one-way clutch modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If actuators and cam members are used to switch between lock mode and one-way clutch mode, then mode switching capability is achieved, but device size increases
Solution Approach 1:
The patent extracts and eliminates the actuator and cam member from the clutch device structure. Instead of using these separate components for mode switching, the invention integrates the mode switching function directly into the clutch mechanism through the interaction between claw members and inclined surfaces, thereby reducing device size while maintaining mode switching capability
Solution Approach 2:
The patent merges the mode switching function with the clutch engagement mechanism. The claw members serve dual purposes: they engage with tooth portions for torque transmission and simultaneously interact with inclined surfaces to enable mode switching, eliminating the need for separate actuating components
2Adaptability or versatility
If actuators and cam members are used to switch between lock mode and one-way clutch mode, then mode switching capability is achieved, but device complexity increases
Solution Approach 1:
The patent removes the actuator and cam member components, thereby reducing the number of parts and simplifying the overall device structure. The mode switching function is achieved through the inherent mechanical interaction of the clutch components themselves rather than through separate control mechanisms
Solution Approach 2:
The claw members are designed to perform multiple functions: they engage with tooth portions for torque transmission in lock mode, and simultaneously interact with inclined surfaces to enable mode switching. This multi-functionality reduces the need for separate components and simplifies the device structure
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 downsizing of the clutch device while maintaining functionality, reducing complexity and size without compromising performance.
Implementation Method 1
an elastic member that biases the shutter plate in a rotation direction
Implementation Method 2
the second claw members are released from the respective grooves when a centrifugal force of a predetermined value or more acts
Data Source
AI summary
A ratchet type clutch device includes outer and inner rings. A shutter plate of the inner ring has restriction tooth portions formed on an outer peripheral surface thereof. When viewed from an axial direction, a state where the restriction tooth portions are misaligned in a first rotation direction for tooth portions and overlap with a part of grooves is set as a closed state of the shutter plate, and a state where all the restriction tooth portions overlap with the tooth portions is set as an open state of the shutter plate. An elastic member biases the shutter plate from the open state to the closed state. Each of first claw members is formed to be able to enter into the corresponding groove in the closed state, and each of second claw members is formed to be able to enter into the corresponding groove in the open state.