Power Ratchet Wrench Mounting Bracket Force Transmission
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Solution Overview
Problem
Conventional power ratchet wrenches suffer from quick damage to the clamping segments due to the transmission of force, leading to insecure mounting of the drive ring and operating shaft, which prevents effective fastening or loosening of bolts or nuts.
Innovation Solution
The power ratchet wrench features a body with an outer thread and annular flange, a planet gear device with transmitting gear wheels and rotating bracket, and a mounting bracket with inserting channels, securely mounting the drive ring and operating shaft to prevent damage from applied forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If force is transmitted to the clamping segments to operate the drive ring and operating shaft, then the fastening or loosening function is achieved, but the clamping segments are damaged quickly due to the applied force
Solution Approach 1:
The harmful function of the clamping segments transmitting force is extracted and removed from the system. The patent replaces the clamping segments with inserting channels that extend into the mounting bracket, transferring the force transmission function to a more durable structural feature that is integral to the mounting bracket itself.
Solution Approach 2:
The patent employs a composite structural approach where the inserting channels are formed as integral parts of the mounting bracket, combining the mounting function and force transmission function into a unified robust structure. This composite design eliminates the separate clamping segments that were prone to damage.
2Ease of manufacture
If the drive ring and operating shaft are mounted using clamping segments, then the operating device can be installed, but the mounting becomes insecure due to quick damage of the clamping segments
Solution Approach 1:
The patent merges the mounting function and the force transmission function into a single integrated structure. The inserting channels are formed directly in the mounting bracket, combining what were previously separate functions (mounting the operating device and transmitting force) into one unified structural solution, thereby eliminating the weakness of separate clamping segments.
Solution Approach 2:
The inserting channels are pre-formed in the mounting bracket during manufacturing, before the operating device is assembled. This preliminary action creates a durable, integral mounting structure that is designed to withstand operational forces from the beginning, rather than relying on separate clamping segments that may fail during use.
3Ease of operation
If the clamping segments transmit all applied force, then the operating shaft can be rotated to fasten or loosen bolts, but the clamping segments suffer damage due to concentrated stress
Solution Approach 1:
The stress-bearing function is extracted from the clamping segments and transferred to the inserting channels formed in the mounting bracket. The patent removes the clamping segments from the force transmission path, eliminating their exposure to concentrated stress while maintaining the operational function of rotating the operating shaft.
Solution Approach 2:
The patent transitions from a localized stress concentration in separate clamping segments to a distributed stress structure where the inserting channels provide extended support within the mounting bracket. This dimensional change in the force transmission path distributes the stress over a larger volume of the bracket 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
This design ensures uniform force transmission and enhanced structural strength, preventing damage to the mounting bracket and allowing secure operation for fastening or loosening bolts or nuts.
Implementation Method 1
The pawl teeth are formed on the external surface of the operating shaft (416) and are engaged with the ratchet teeth of the drive ring (411)
Implementation Method 2
The outer thread is formed on the outer surface of the connecting tube and is screwed securely with the inner thread of the body (60)
Data Source
AI summary
The power ratchet wrench has a body, a planet gear device and a mounting bracket. The body has an outer thread and an annular flange. The planet gear device is connected to the body and has three transmitting gear wheels, a rotating bracket, a bearing and a mounting cover. The transmitting gear wheels are mounted in the chamber of the body. The rotating bracket is rotatably mounted in the chamber of the body, is connected with the transmitting gear wheels and has a bottom plate, three mounting posts and an extending rod. The mounting cover is connected to the body around the rotating bracket and has an inner thread and a resisting flange. The mounting bracket is connected to the planet gear device and the body and receives an operating device.