Multi-Angle Bundle Pawl Ratchet Ring for Low-Backlash Impact Loads
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ratchet and cam clutch systems suffer from backlash, reduced precision, and durability issues when subjected to strong impact loads, due to gaps between parts and wear of components like pawls and bearing balls.
Innovation Solution
The impact-resistant multi-angle bundle pawl backstop ratchet ring features an outer ring with saw teeth and an inner ring with multi-angle bundle pawls, configured for sequential engagement at different angles to minimize gaps and prevent backlash, while being designed to withstand strong impact loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional ratchet or cam clutch systems are subjected to strong impact loads, then the device can operate under heavy conditions, but gaps between parts cause backlash and precise rotational power is not transmitted
Solution Approach 1:
Multiple pawls engage with multiple teeth simultaneously, creating multiple contact points that distribute impact loads. This segmentation prevents the gaps between parts from causing backlash under impact, as the distributed engagement maintains precise rotational power transmission even under heavy loading conditions.
Solution Approach 2:
The spring-loaded pawls are pre-loaded to maintain constant contact with the teeth, providing beforehand cushioning that prevents gap formation during impact. The springs absorb shock and maintain engagement pressure, ensuring precise operation is maintained even when subjected to strong impact loads.
2Duration of action of stationary object
If conventional ratchet or cam clutch systems are used for a long period of time, then the device can provide continuous operation, but the single pawl or bearing ball wears out resulting in severe backlash
Solution Approach 1:
The wear that occurs during continuous operation is distributed across multiple pawls and teeth rather than concentrated at a single contact point. This segmentation extends the service life of the system and prevents the severe backlash that develops in conventional systems after prolonged use, as each individual pawl experiences reduced wear.
Solution Approach 2:
By distributing engagement points locally around the circumference, the invention ensures that wear occurs at multiple locations rather than one. This local quality distribution maintains precision even after long periods of continuous operation, as the system can tolerate wear at individual locations without developing severe backlash.
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 configuration simplifies the structural design, enhances durability, and ensures precise operation by minimizing backlash and preventing driving shock, thereby improving the overall performance under strong impact conditions.
Implementation Method 1
a multi-angle bundle pawl unit having springs each installed in a corresponding one of the bundle pawl mounting grooves, wherein the multi-angle bundle pawl unit is operated to protrude by the springs and is engaged with the outer ring saw teeth
Data Source
AI summary
The present invention relates to a ratchet ring capable of transmitting one-way power and, more specifically, to an impact-resistant multi-angle bundle pawl backstop ratchet ring formed so that an outer-wheel sawteeth portion is formed in the inner circumference of an outer wheel and plural sets of multi-angle bundle pawls engaged with the outer-wheel sawteeth portion are formed on the circumference of an inner wheel, and thus, a structural simplification and precise operation can be achieved and durability against a strong impact load can be obtained. Also, by enabling the segmented engagement within one-pitch section of the outer-wheel sawteeth portion so that the multi-angle bundle pawl in each set can be engaged with the outer-wheel sawteeth portion at sequential locations at different angles, a sawteeth void due to the sequential engagement structure can be reduced so as to minimize an error and to prevent a backlash effect.