Auxiliary Tool for Timing Gear Mounting and Dismounting
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Solution Overview
Problem
Existing hand tools for mounting or dismounting timing gears require reversing the operating direction and are inconvenient when handling different sizes, as they need adjustments and re-locking of components.
Innovation Solution
An auxiliary tool with a support member, movable device, and handle, featuring a transversely extending stop rod, longitudinally extending sliding slot, and an elastic member, allowing rapid adjustment to fit different sizes without reversing the operating side, using a tensile spring to adjust the distance between the stop rod and stem for engaging with timing gear notches at two opposite sides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a commercial holding tool with a fixed stop member is used, then the tool can prevent wheel rotation during mounting or dismounting operations, but the tool cannot be used for different sizes of wheels without adjusting and re-locking the stop member
Solution Approach 1:
The stop member is made movable along the longitudinal sliding slot instead of being fixed, allowing it to dynamically adjust its position. The elastic member provides a spring-loaded mechanism that enables the stop member to move freely to different positions while maintaining contact with the wheel, thus adapting to different wheel sizes without requiring manual adjustment and re-locking
Solution Approach 2:
The tool body is segmented into functional components: a fixed stop rod, a movable stop member, and an elastic member. This segmentation allows the stop member to independently adjust its position along the sliding slot to match different wheel sizes, providing versatility while maintaining ease of operation
2Adaptability or versatility
If a movable jaw type holding device with a spring member is used, then the device can be adjusted to different sizes, but the device must be reversed when mounting due to the spring keeping the jaws open during forward rotation
Solution Approach 1:
The tool employs asymmetric positioning of the stop rod and stop member at opposite ends of the tool body, allowing the tool to function effectively in a single operating direction. The limit slot with stop walls asymmetrically constrains the handle's pivoting movement, ensuring the stop member engages with the wheel notch during the mounting rotation direction, eliminating the need to reverse the device
Solution Approach 2:
The tool adds a longitudinal dimension for the stop member's movement along the sliding slot, enabling it to reach different radial positions on wheels of various sizes. This dimensional addition allows the tool to maintain effectiveness in a single operating direction while adapting to different wheel dimensions
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 convenient mounting and dismounting of timing gears of various sizes without reversing the tool, ensuring effective stopping of the gear rotation during operation, thus improving user convenience and efficiency.
Implementation Method 1
an elastic member, for example, tensile spring, connected between the support member and the movable device. Subject to the arrangement of the tensile spring, the distance between the stop rod and the stem is rapidly adjustable
Data Source
AI summary
An auxiliary tool for timing gear for use with a wrench to mount or dismount a timing gear is disclosed to include a support member having a stop rod at its one end, a movable device slidably mounted in the support member and providing a stem at its one end for working with the stop rod to engage into peripheral notches of the timing gear at two opposite sides during application, and a handle pivotally coupled to the support member and defining therein a longitudinally extending limit slot for accommodating one end of the movable device to limit pivoting movement between the support member and the handle within a predetermined range.