Reinforced Drive Tool Socket With Segmented External Diameters
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Solution Overview
Problem
Existing drive tools with non-uniform wall thickness in the socket are prone to stress concentration and cracking under torque, leading to potential disengagement of the drive bit during rotational operations.
Innovation Solution
A reinforced drive tool design featuring a socket with distinct sections, including a reinforcing section and a neck, which reduces stress concentration by varying external diameters and distances, ensuring secure engagement of the drive bit through a hexagonal hole with specific dimensional relationships.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the socket has non-uniform wall thickness to accommodate hexagonal hole and circular periphery, then the socket can be engaged in a smaller end of the socket for convenient insertion, but the thinner wall is susceptible to stress concentration and cracking when the socket is subject to torque
Solution Approach 1:
The socket is divided into three distinct sections (first, second, and third sections) with different external diameters, creating a segmented structure that addresses both insertion convenience and stress resistance. The first section has a larger diameter for engagement, the second section has a smaller diameter for reduced stress concentration, and the third section provides a transition zone.
Solution Approach 2:
Different sections of the socket are designed with different local properties - the first section has a larger external diameter for engagement purposes, while the second section has a smaller external diameter to reduce stress concentration. This local variation in dimensions allows each part of the socket to optimize for its specific function.
2Adaptability or versatility
If the wall thickness is reduced to allow hexagonal hole definition, then the socket can accommodate the drive bit, but the reduced wall thickness leads to stress concentration under torque
Solution Approach 1:
The socket structure is segmented into multiple sections with varying diameters. The second section with smaller external diameter specifically addresses the drive bit accommodation requirement while the first and third sections provide structural support to prevent cracking under torque.
Solution Approach 2:
The external diameter parameter is changed across different sections of the socket. The first section has a larger external diameter, the second section has a smaller external diameter to accommodate the drive bit, and the third section provides a transition. This parameter variation allows the socket to both accommodate the drive bit and resist cracking.
3Strength
If the socket has a larger diametrical outer periphery at the larger end for reinforcing structure, then the structural strength is improved, but the wall thickness becomes non-uniform causing stress concentration
Solution Approach 1:
The socket is segmented into three sections with progressively different external diameters. The first section provides structural reinforcement with a larger diameter, while the second and third sections have smaller diameters to create a more uniform stress distribution pattern that prevents concentration at specific weak points.
Solution Approach 2:
The socket employs an asymmetric design where the external diameter varies along its length rather than being uniform. The first section has a larger external diameter for reinforcement, while the second and third sections have smaller diameters, creating an asymmetric profile that optimizes both strength and stress distribution.
Data Source
AI summary
A socket includes a hole having a hexagonal cross section and defining six abutting sides and an included angle between any of the two adjacent abutting sides. Any of the two opposite abutting sides are spaced at a first distance. Any of the two opposite included angles are spaced at a second distance. The socket has first, second, and third sections having first, second and third external diameters, respectively. The second external diameter is smaller than the first external diameter, and the third external diameter is smaller than the second external diameter, respectively. A difference between the second and third external diameters is not less than a difference between the first and second distances. A drive bit is mounted to the second end of the socket.