Shear Wrench Sleeve Assembly for Tip Ejection and Balanced Handling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Shear wrench tools are cumbersome due to their weight, causing user fatigue, and require manual effort to counteract the moment of force, while also presenting difficulties in removing the sheared bolt tip for reuse.
Innovation Solution
A shear wrench tool design with a balanced handle section that minimizes wrist fatigue through ergonomic placement of the handle at the tool's center of gravity, incorporating a trigger mechanism, and an ejection mechanism using planetary gear stages and impact parts to efficiently remove the sheared bolt tip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the shear wrench tool includes motor, transmission and output section, then the tool can perform shearing function, but the tool becomes heavy causing user fatigue
Solution Approach 1:
The patent applies the counterweight principle by positioning the handle at the tool's center of gravity to create a balanced moment. The handle is located part-way along the axial length of the drive section, specifically at a position where the moment of force from the heavy components (motor, transmission, output section) is counterbalanced, reducing the counter moment required by the user's wrist and thereby reducing user fatigue despite the tool's weight.
2Device complexity
If the handle is provided at the rear of the tool, then the tool structure is simplified, but user fatigue increases due to counter moment requirement
Solution Approach 1:
The patent positions the handle not at the extreme rear but part-way along the axial length of the drive section, at a location that serves as a fulcrum point. This positioning creates a balanced moment where the heavy components (motor, transmission, output section) on one side are counterbalanced by the structural design on the other side, reducing the counter moment required by the user's wrist and thereby reducing user fatigue while maintaining structural simplicity.
3Productivity
If the sheared tip remains in the tool after shearing, then the shearing function is complete, but manual removal effort is required reducing productivity
Solution Approach 1:
The patent implements a self-service mechanism where the tool automatically ejects the sheared tip without requiring manual removal. The ejection mechanism includes a spring-loaded plunger that is radially movable relative to the output sleeve. After shearing, the plunger automatically moves to eject the sheared tip from the output sleeve, allowing the tool to service itself and eliminate manual removal effort, thereby improving productivity.
Solution Approach 2:
The patent uses a dynamic ejection mechanism where the plunger can move radially relative to the output sleeve. The plunger is positioned to engage the sheared tip and eject it when needed. This dynamic movement allows the tool to adapt its internal configuration to automatically remove the sheared tip, eliminating the need for manual intervention and improving operational efficiency.
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
The tool reduces user fatigue by balancing moments of force and simplifies the removal of the sheared bolt tip, enhancing usability and efficiency in repetitive tasks.
Implementation Method 1
A spring is provided behind the plunger for urging the plunger radially inwardly relative to the output sleeve
Implementation Method 2
The ejection mechanism has a first impact part and a second impact part
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A sleeve assembly for a shear wrench tool comprising: an output sleeve configured to mate with a nut to facilitate winding of the nut onto a threaded bolt and having a plurality of circumferentially arranged locking features for interlocking with those of a transmission sleeve; a transmission sleeve for transferring torque between the output sleeve and at least one feature of a shear wrench tool transmission section the transmission sleeve having a first set of circumferentially arranged locking features for interlocking with the locking features of the output sleeve and a second set of circumferentially arranged locking features for cooperating with a locking sleeve; a locking sleeve coupled to the output sleeve in a manner which permits the locking sleeve to rotate between first and second rotational positions relative to the output sleeve, the locking sleeve having circumferentially arranged locking features which cooperate with the second set of circumferentially arranged locking features of the transmission sleeve upon rotating the locking sleeve between the first and second rotational positions when the locking features of the output sleeve and the first set of locking features of the transmission sleeve are interlocked whereby axial movement between the output sleeve and the transmission sleeve is restricted.