Tool Holder Stopper Mechanism for Reliable Driver Separation
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Solution Overview
Problem
Conventional tool holders require operators to perform complex and labor-intensive operations to detach and attach tool units, with springs causing poor operability and potential deformation, and struggle with maintaining waterproof sealing during these processes.
Innovation Solution
An operating device with a movable stopper mechanism that restricts movement at specific positions, allowing for simpler operation and reliable separation of the driver from the camshaft during spindle rotation, while enhancing waterproof sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring is used to bias the driver upward to separate it from the camshaft, then the driver can be reliably separated from the camshaft during spindle rotation, but the operability deteriorates because the operator must press against the spring's reaction force
Solution Approach 1:
The spring is removed from the system entirely. Instead of using elastic force to separate the driver from the camshaft, the patent employs a stopper mechanism that physically blocks the driver's movement path, eliminating the need for spring-based separation while reducing operational resistance
Solution Approach 2:
A stopper is introduced as an intermediary element between the driver and the camshaft separation path. The stopper acts as a mechanical mediator that ensures reliable separation by preventing the driver from contacting the camshaft during rotation, without requiring the operator to overcome spring resistance
2Ease of operation
If the spring's reaction force is reduced to improve operability, then it becomes easier to push the driver in, but the driver cannot be reliably separated from the camshaft and waterproof sealing is compromised
Solution Approach 1:
The spring mechanism is completely removed from the system. The stopper-based separation mechanism eliminates the trade-off between spring force strength and operability by using a binary mechanical blocking system rather than a continuous elastic force system
Solution Approach 2:
The separation mechanism transitions from a force-based parameter (spring reaction force) to a position-based parameter (stopper location). This changes the fundamental parameter controlling separation from magnitude of force to spatial positioning, eliminating the need to balance force strength against operability
3Ease of operation
If the driver is pushed insufficiently into the camshaft, then operability is improved, but the fitting portions of the driver and camshaft get deformed, impeding subsequent use
Solution Approach 1:
The stopper is positioned in advance to define the exact insertion depth required for proper fitting. By pre-establishing the mechanical stop position, the system ensures that each insertion operation achieves the correct depth without requiring operator judgment or force control, preventing both insufficient and excessive insertion
4Reliability
If a spring with strong reaction force is used, then the driver can be reliably separated from the camshaft, but it becomes difficult for the operator to push in the driver with one hand
Solution Approach 1:
The spring is removed from the system. The stopper mechanism provides separation assurance without requiring the operator to exert force against elastic resistance, dramatically reducing the pushing force needed while maintaining reliable separation
Solution Approach 2:
Instead of using an active force-generating element (spring) to push the driver out, the system uses a passive blocking element (stopper) to prevent the driver from staying engaged. This inverts the mechanism from active expulsion to passive prevention, reducing the force required during operation
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 simplifies the clamping and unclamping process, ensures reliable driver separation from the camshaft, and improves the waterproof effect of the tool holder, enhancing overall operability and safety.
Implementation Method 1
a movement restriction mechanism adapted to restrict movement of the driver (25), wherein the movement restriction mechanism includes stoppers (40) movable in a radial direction of the through-hole (27)
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
The present invention provides a tool holder and the like which excel in operating efficiency and allow a driver to be separated reliably from a camshaft during rotation of a spindle. In an operating device 20 provided with an insertion recess 34 which allows insertion of a driver operating tool 35 and operated such that a driver 25 movable in an axial direction of the driver in a through-hole 27 is pushed in from a reference position A to an operating position B, the driver operating tool being mounted from outside, the operating device 20 includes a retention device 38 or 40 adapted to prevent the operating tool 35 from falling out of the insertion recess 34 when the driver 25 is placed between the reference position A and the operating position B.