Clamping Device Two-Part Lid for Bolt Expansion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing clamping devices for threaded bolts require complex and time-consuming processes for screwing and unscrewing, especially when replacing changeable bushings with different thread geometries or lengths, due to the need to disassemble resilient arrangements.
Innovation Solution
A clamping device with a two-part lid construction and a resilient arrangement that loads the piston instead of the changeable bushing, allowing for rapid screwing and unscrewing, and enabling easy replacement of the changeable bushing without disassembling the resilient arrangement, using a closure lid that secures the bushing in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the resilient arrangement is supported directly on the changeable bushing, then the bushing can be axially carried by the piston, but the replacement of the bushing requires disassembly of the resilient arrangement which increases complexity
Solution Approach 1:
The lid is divided into two separate parts: a lid base member that supports the resilient arrangement, and a closure lid that closes the opening. This segmentation allows the resilient arrangement to remain fixed on the lid base member while the changeable bushing can be freely removed and replaced through the opening, eliminating the need to disassemble the resilient arrangement for bushing replacement.
2Ease of operation
If the clamping device is rotated about its axis for screwing the changeable bushing, then the bushing can be screwed to the threaded bolt, but the operation becomes time-consuming and difficult due to the weight of the device
Solution Approach 1:
Instead of rotating the heavy clamping device to screw the bushing, the invention inverts the approach by keeping the device stationary and allowing the bushing to be screwed through the opening in the lid. This eliminates the need to rotate the entire device, significantly reducing the time and effort required for screwing operations.
3Ease of operation
If the opening in the lid base member has the same radial extent as the radially expanded portion of the changeable bushing, then the bushing is securely held, but the bushing cannot be easily removed for replacement
Solution Approach 1:
The opening in the lid base member is designed with a specific local quality: its radial extent is greater than that of the radially expanded portion of the changeable bushing. This local dimensional difference creates a clearance that allows the bushing to be easily inserted and removed, while the closure lid provides the necessary retention when closed, thus balancing ease of removal with secure holding.
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
Facilitates simple and rapid screwing and unscrewing operations, particularly for highly loaded screw connections, and allows for quick replacement of changeable bushings, reducing complexity and improving safety by preventing accidental ejection of the bushing.
Implementation Method 1
a resilient arrangement (15) which is arranged around the changeable bushing (10) and which acts axially on the piston (5)
Implementation Method 2
a piston (5) which can be moved in the longitudinal direction in the cylindrical housing (1) and which can be connected to a hydraulic supply line (7)
Data Source
AI summary
A clamping device for expanding a threaded bolt is provided with a support pipe supported against an underlay surrounding the threaded bolt. A cylindrical housing arranged in extension of the support pipe has a piston movable in longitudinal direction and connectable to a hydraulic supply. A changeable bushing is axially carried by the piston and is provided with an inner thread and a radially expanded portion. A resilient arrangement is arranged around the bushing and acts axially on the piston. A lid is secured to the housing. The other support of the resilient arrangement is provided on the lower side of the housing. The lid has a lid base member and a closure lid. The lid base member is provided with an opening closable by the closure lid. The radial extent of the opening is greater than the radial extent of the radially expanded portion of the bushing.