Angle-Adjustable Ratchet Tool Hinge Mechanism
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Solution Overview
Problem
Traditional pneumatic and electric ratchets have a fixed linear, right-angled design, leading to awkward operator positioning and increased risk of ergonomic disorders and repetitive stress injuries due to inability to adjust the angle between the grip and the bolt or fastener.
Innovation Solution
An angle-adjustable ratchet tool with a motor housing portion rotatably attached to the handle via a hinge, allowing rotation of the motor housing portion with respect to the handle by at least ±20°, featuring a switch to control motor operation and directional rotation, and incorporating ergonomic grip elements for comfortable use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed linear, right-angled design is used, then the tool structure is simple and sturdy, but the operator positioning becomes awkward and ergonomic disorders increase
Solution Approach 1:
The motor housing portion is made rotatable relative to the handle portion through a hinge mechanism, transforming the fixed structure into a dynamic, angle-adjustable configuration. This allows the tool to adapt to different operational angles, improving operator positioning while maintaining structural integrity through the hinge connection and locking mechanism.
2Adaptability or versatility
If the motor housing portion is made rotatable, then angle adjustability is achieved, but the device complexity increases
Solution Approach 1:
The tool is divided into separable components: the handle portion and the motor housing portion, connected by a hinge mechanism. This segmentation allows for independent rotation and adjustment of the motor housing, enabling angle adaptability while keeping the overall structure modular and manageable.
Solution Approach 2:
A hinge mechanism serves as an intermediary element between the handle portion and the motor housing portion, enabling controlled rotation and angle adjustment. The hinge acts as a mediator that allows movement while maintaining structural connection, and a locking mechanism provides stability when positioning is required.
3Object-affected harmful factors
If a fixed angle design is used, then the manufacturing is simpler, but ergonomic disorders and repetitive stress injuries increase
Solution Approach 1:
The tool incorporates a dynamic hinge mechanism that allows the motor housing portion to rotate to different angles, enabling the operator to adjust the tool to ergonomic positions. This dynamic adjustment capability reduces harmful factors like ergonomic disorders and repetitive stress injuries by allowing natural hand and wrist positioning during operation.
Data Source
AI summary
An angle-adjustable ratchet tool comprises a body comprising a handle portion, comprising a connection to an energy source, and a switch connected to the energy source, a motor housing portion rotatably attached to the handle portion at a hinge point, the motor housing portion comprising a motor connected to the energy source, and a head mechanically connected to the motor and having a tip, the tip oriented to rotate about an axis orthogonal to an axis of rotation of the motor, wherein the switch is configured to provide energy to the motor from the energy source when the switch is pressed, and wherein the motor housing portion is configured to rotate at the hinge point with respect to the handle portion at a total angle of travel of at least ±20°.