Spring-Loaded Safety Bolt for Impact Wrench Socket Attachment
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Solution Overview
Problem
Existing square tool holders for impact wrenches are difficult to handle and maintain, as securing bolts are hard to replace or repair, and impact wrench sockets cannot be attached or removed without tools, leading to instability and potential breakage.
Innovation Solution
A spring-loaded safety bolt with a rounded, hemispherical surface is integrated into the square tool holder, secured by safety pins, allowing tool-free attachment and detachment of sockets and enhancing stability by minimizing cross-section weakening, while being less susceptible to breakage due to parallel locking pin arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional securing bolt is used in the square tool holder, then the structure is simple, but the bolt is difficult to replace or repair and requires tools for attachment and detachment
Solution Approach 1:
The securing bolt is designed with a rounded, preferably hemispherical, surface that protrudes from the holding surface when rebounded. This curved geometry enables tool-free attachment and detachment of impact wrench sockets by allowing manual pressing and release, directly resolving the ease of operation requirement while maintaining structural integrity through the spherical design.
Solution Approach 2:
The securing bolt is made movable within the square drive, transitioning between a rebounded state (protruding for tool attachment) and a spring-loaded state (recessed for securing). This dynamic capability allows the bolt to adapt its position for different operational phases, enabling tool-free socket changes while maintaining a relatively simple overall structure.
2Reliability
If multiple bores and blind holes are created for securing bolts, then the securing mechanism is functional, but the cross-section is weakened leading to potential breakage
Solution Approach 1:
The securing function is extracted from the main body of the square drive and implemented through a separate, movable securing bolt that can be inserted and removed. This allows the cross-section to remain largely intact when the bolt is not in use, minimizing weakening while maintaining the ability to secure tools when needed.
Solution Approach 2:
The securing bolt is designed with sufficient dimensions and material properties to compensate for the weakening effect of the bore and blind hole. The bolt's strength and the strategic placement of fastening elements provide prior reinforcement that counteracts the potential breakage risk from the openings in the square drive.
3Ease of operation
If the securing bolt is made movable for easy attachment, then tool-free operation is enabled, but the bolt may fall out without proper securing
Solution Approach 1:
The securing bolt is designed to be movable within controlled limits, allowing it to transition between rebounded (for attachment) and spring-loaded (for securing) states. This dynamic design enables tool-free operation while the spring mechanism ensures the bolt returns to and remains in the secured position, preventing accidental drop-out.
Solution Approach 2:
The spring-loaded mechanism provides automatic securing of the bolt without requiring additional fastening operations. When the bolt is pressed into the rebounded position for tool attachment, the spring automatically loads and secures it in place, and when released, the spring automatically returns the bolt to the secured position, maintaining reliability without additional complexity.
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 solution enables easy handling and secure attachment of impact wrench sockets without tools, while maintaining structural stability by reducing cross-section weakening and preventing bolt fall-out, thus improving usability and durability.
Implementation Method 1
The safety bolt is spring-loaded in the square drive
Implementation Method 2
the safety bolt having a rounded, preferably hemispherical, surface which protrudes from a holding surface of the drive square when the safety bolt is in a rebounded state
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a square tool holder (10) for an impact wrench, comprising an anvil (1), on which a drive square (2) for holding a tool, in particular an impact wrench socket, is arranged, and comprising a securing bolt (3) for securing the held tool, wherein the securing bolt (3) is spring-mounted in the drive square (2) in such a way that the securing bolt can move perpendicularly to the axis of rotation (D) of the anvil (1), wherein the securing bolt (3) has a rounded, preferably hemispherical surface (3'), which protrudes from a holding surface (2') of the drive square (2) in a spring-extension state (AZ) of the securing bolt (3) and is at least partially lowered in the holding surface (2') in a spring-compression state of the securing bolt (3), wherein the securing bolt (3) is secured against falling out by at least one securing pin (4, 4') arranged in the drive square (2).