Quick-Change Hole Saw Chuck With Rotary Clamping Ring Release
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Solution Overview
Problem
Existing quick-change chucks require significant user strength to loosen the clamping cheek and transfer it to the release position, leading to potential imbalance and safety issues during drilling, especially in interrupted cuts or sloping drilling.
Innovation Solution
A quick-change chuck with a rotatable clamping ring that converts rotary motion into linear movement, allowing the clamping cheek to be easily transferred from the interference to the release position through a linear transmission mechanism, and featuring a guide curve that adjusts the clamping cheek radially to facilitate secure attachment and detachment of the hole saw.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the clamping jaw is pressed together to release the hole saw, then the hole saw can be detached, but a lot of force is required making it difficult for the user to perform
Solution Approach 1:
The patent employs a guide curve with a specific geometric shape that converts rotational motion of the clamping ring into linear radial movement of the clamping jaw. The curved profile of the guide curve allows the clamping jaw to move along a controlled path, transforming the user's rotational input into the necessary linear displacement to release the hole saw with reduced effort.
Solution Approach 2:
The guide curve acts as an intermediary mechanism between the clamping ring and the clamping jaw. It mediates the force transmission by converting the rotational force applied to the clamping ring into the linear radial force needed to move the clamping jaw, thereby reducing the direct force requirement on the user.
2Ease of operation
If the clamping jaw moves out of the center due to imbalance at higher speeds, then the hole saw can be released, but the clamping jaw may break off and cause injuries
Solution Approach 1:
The guide curve's geometric design ensures that the clamping jaw moves along a precise radial path during rotation. This controlled curved trajectory prevents the clamping jaw from moving out of center or becoming unbalanced during operation, eliminating the safety hazard of the clamping jaw breaking off while maintaining the hole saw release functionality.
3Device complexity
If thread segments are pressed together in one longitudinal direction only, then the structure is simple, but the thread diameter is reduced only in longitudinal direction causing side surfaces to flatten and reducing engagement range
Solution Approach 1:
The guide curve's three-dimensional geometric profile enables the clamping jaw to move not only longitudinally but also radially during the releasing operation. This curved path of movement allows the thread segments to be pressed together in multiple directions simultaneously, preventing surface flattening and maintaining full thread engagement across the entire circumference, thereby improving durability without complicating the overall mechanism.
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 significantly reduces the effort required to loosen the clamping cheek, enhances safety by minimizing the risk of imbalance and injury, and improves durability by allowing a wider range of thread engagement, thus ensuring reliable and efficient operation during drilling processes.
Implementation Method 1
A spring is arranged between the clamping jaw and the base body such that the at least one thread segment can be moved against a spring force of the spring from an engaged position located radially further outwards into a release position located radially further inwards
Implementation Method 2
A quick-change chuck with a rotatable clamping ring that converts rotary motion into linear movement, allowing the clamping cheek to be easily transferred from the interference to the release position through a linear transmission mechanism
Implementation Method 3
featuring a guide curve that adjusts the clamping jaw radially to facilitate secure attachment and detachment of the hole saw
Data Source
Figure 1
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Figure 3~7
AI summary
The invention relates to a quick-change chuck for connecting a hole saw to a drive, e.g. of a drilling machine. The quick-change chuck, which can be rotated about an axis of rotation (D), has, for releasable connection to a hole saw, screw thread segments for forming an external screw thread, said screw thread segments being located around the axis of rotation. At least one screw thread segment is located on a movable clamping jaw (14) which is preloaded by means of a spring, and the at least one screw thread segment (14.6) can be moved against a spring force from a radially further outward engagement position into a release position which is radially further inward in relation to said engagement position. In order to simplify the release of the at least one clamping jaw (14), a clamping ring (6) rotatable about the axis of rotation is provided, the clamping ring being in the form of a linear transmission in order to transfer the at least one clamping jaw (14) from the engagement position to the release position in the event of a rotation.