Power-Operated Chisel Mounting Tool with Bidirectional Actuation
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Solution Overview
Problem
Existing tools for removing and replacing chisels from chisel holders require significant force, occupy excessive space, and can be hazardous, especially in tight spaces, and often fail when the chisel head is worn or broken.
Innovation Solution
A tool with a bidirectionally power-operated actuating member featuring a push-off and draw-in section, powered by a hydraulic or electric drive, allowing for easy mounting and removal of chisels through a compact design that engages the chisel's circumferential groove, with support elements for stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a pin-shaped push-off section connected to a handle by a hinged connector is used for chisel removal, then the tool can be operated with simple structure, but great force is required and the operation becomes hazardous in tight spaces
Solution Approach 1:
The patent replaces the manual hinged connector system with a power-operated actuating unit that uses hydraulic or electric mechanisms to automatically position and apply force through the push-off section, eliminating the need for manual leverage and pivoting operations
Solution Approach 2:
The actuating member serves as an intermediary between the power source and the chisel, translating power unit motion into precise push-off actions on the chisel shank, thereby mediating the force application and improving operational safety
2Reliability
If hydraulic systems or mechanical lever systems are employed for driving the plunger, then the chisel can be removed from the receiving bore, but a lot of structural space is required which cannot always be provided
Solution Approach 1:
The patent combines the plunger function and push-off section into a single integrated actuating member, eliminating the need for separate hydraulic systems or mechanical lever systems, thereby reducing the overall tool volume while maintaining removal capability
Solution Approach 2:
The actuating member serves multiple functions: it acts as both the plunger for pushing the chisel out and the push-off section for applying force to the chisel shank, thereby reducing the number of components and overall tool size
3Reliability
If claw retractors that engage a circumferential groove in the chisel head are used, then the chisel can be held and removed, but the tools become useless when the chisel head is worn out or broken off
Solution Approach 1:
The patent extracts the engagement mechanism from the chisel head area and relocates it to engage the circumferential groove on the chisel shank instead, thereby separating the holding function from the worn chisel head portion
Solution Approach 2:
Instead of engaging the chisel head as conventional tools do, the invention inverts the approach by engaging the chisel shank's circumferential groove, which remains intact even when the chisel head is worn or broken
4Ease of manufacture
If the receiving bore is embodied as a through-bore allowing access to the chisel shank end, then the security element can be engaged, but the tool requires great force for removal and cannot be used in tight spaces
Solution Approach 1:
The patent replaces manual mechanical leverage systems with a power-operated actuating unit that automatically positions and applies force, eliminating the need for operators to generate great force manually
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 effortless and safe replacement of chisels with reduced structural requirements, maintaining tool functionality even when the chisel head is worn or damaged, by providing large mounting and removal forces through a compact and user-friendly mechanism.
Implementation Method 1
the actuating unit has a hydraulic unit with a hydraulic cylinder, on which a piston can be displaced, and the actuating member is connected with the piston via a piston rod
Implementation Method 2
the actuating member can be power-operated bidirectionally in the displacement direction by the actuating unit, for example by an electric or a hydraulic drive mechanism
Data Source
AI summary
A tool for mounting a chisel on a chisel holder, having an actuating member, which has a push-off section, wherein the actuating member can be displaced along a displacement direction. It is possible to simplify changing the chisel if the actuating member can be shifted by an actuating unit. The actuating unit has a draw-in section, which is spaced apart from the push-off section and is arranged transversely with respect to the displacement direction of the actuating member. The actuating member can be power-operated bidirectionally in the displacement direction by the actuating unit.