Grinding Device Inner Hole Button Assembly
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Solution Overview
Problem
Conventional grinding devices for inner holes are difficult to disassemble and require two wrenches, making it challenging to hold the device during the process, which complicates the task of changing tools.
Innovation Solution
A grinding device with a button assembly that restricts the rotation of the extension shaft, allowing the user to hold the device with one hand and disassemble the nut using the other hand, by pressing a button that extends into a concave structure to stabilize the shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional grinding device uses a nut and extension shaft assembly for tool mounting, then the tool can be securely fixed, but the device becomes difficult to disassemble and requires two wrenches for nut removal
Solution Approach 1:
A button assembly acts as an intermediary mechanism between the user's hand and the extension shaft. When pressed, the button assembly engages with the concave structure on the extension shaft to restrict its rotation, allowing the user to hold the device with one hand while using the other hand to disassemble the nut, eliminating the need for two wrenches
2Ease of operation
If the user holds two wrenches to disassemble the nut, then the nut can be properly disassembled, but the user cannot hold the grinding device with their hands
Solution Approach 1:
The button assembly provides self-service functionality by automatically restricting the extension shaft rotation when activated. The user simply needs to press the button with one hand, and the system automatically prevents the extension shaft from rotating, enabling easy nut disassembly without requiring complex two-wrench operations
3Adaptability or versatility
If the extension shaft is made rotatable for tool installation, then tools can be easily changed, but the shaft rotates uncontrollably during disassembly
Solution Approach 1:
The extension shaft's rotational characteristic is made dynamic rather than static. The shaft can rotate freely during normal operation for tool installation and removal, but when the button assembly is pressed, it automatically engages with the concave structure to restrict rotation. This dynamic behavior allows the system to adapt to different operational requirements
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 easy disassembly and tool change without the need for additional support, as the user can hold the device securely with one hand and use the other hand to disassemble the nut, simplifying the process.
Implementation Method 1
The button assembly has an elastomer sheathed on the rod, the elastomer has two ends, and each one of the two ends of the elastomer abuts a respective one of the bolt and the button
Implementation Method 2
The bolt is hollow, is mounted in the containing hole, and is threaded with the inner thread of the containing hole
Data Source
AI summary
A grinding device for inner holes has a body, an extension shaft, a nut, and a button assembly. The body has a driving shaft rotatably disposed in the body and a containing hole disposed through a side of the body. The extension shaft has two ends and a concave structure. One of the two ends of the extension shaft is connected with the driving shaft of the body. The concave structure is disposed on the extension shaft, and is aligned with the containing hole of the body after the extension shaft rotates with the driving shaft. The nut is mounted on the other one of the two ends of the extension shaft. The button assembly is mounted in the containing hole of the body, and is able to be pressed and to extend into the concave structure to restrict the extension shaft from rotating.