Pivot Handle Tire Dolly for Compact Storage
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Solution Overview
Problem
Conventional tire dolly devices are inconvenient for tire transportation due to a handle that is difficult to grasp and pull, and they are not easily disassembled or stored, with complex structures that complicate assembly and storage.
Innovation Solution
A tire assembly and disassembly auxiliary device featuring a base frame with a pivotally connected handle and a restricting member, allowing the handle to swing to multiple positions for easier tire movement and storage, with adjustable branch bar members and a U-shaped handle that can be locked in various orientations for secure handling and compact storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the handle is fixed directly on the base frame with a thread to form a fixed structure, then the handle is stable for lifting tires, but it is not easy to disassemble and causes inconvenience in storage
Solution Approach 1:
The handle is changed from a fixed structure to a movable one that can swing between a working position (parallel to ground for lifting) and a storage position (perpendicular to ground for compact storage). The connecting member allows the handle to move relative to the base frame while maintaining stability during operation through the positioning member that locks it in place when needed.
2Ease of operation
If the handle extends forwardly from the base frame close to the ground, then it is suitable for lifting tires in place, but it is not convenient to grasp and pull for tire transportation
Solution Approach 1:
The handle is designed to be movable rather than fixed, allowing it to adapt its position based on the operation needed. It can be positioned parallel to the ground for lifting operations and swung to a perpendicular position for transportation, making the device versatile for both functions.
3Ease of operation
If an arm with a roller is made foldable, then it can be stored compactly, but the structure becomes too complicated to easily assemble
Solution Approach 1:
The handle assembly is segmented into the handle itself and the base frame with the connecting member, allowing independent movement and locking of the handle relative to the base frame. This simpler segmentation avoids the complexity of foldable arm structures while achieving compact storage capability.
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
Enhances convenience in moving and assembling tires by allowing the handle to pivot and lock in multiple positions, facilitating easier transportation and storage by reducing the overall volume and simplifying the assembly process.
Implementation Method 1
The main bar member is pivotally connected with a joint member capable of rotating about an imaginary axis which is parallel to the longitudinal direction
Implementation Method 2
a rotatable roller between the front shaft seat and the rear shaft seat
Implementation Method 3
Each of the end portions of the handle is provided with a first elastic fastener and a second elastic fastener
Data Source
AI summary
A tire assembly and disassembly auxiliary device includes a base frame for loading a tire and a handle. The base frame includes a main bar member and two branch bar members. The main bar member is pivotally connected with a joint member. Each of the branch bar members has a front shaft seat at an end, a rear shaft seat having a rear wheel at an opposite end and a rotatable roller between the front shaft seat and the rear shaft seat. The rear shaft seat has a connecting member capable of movably connecting to the main bar member and being fixed to the main bar member through a positioning member. The handle connects with the joint member so as to pivot relative to the main bar member. A restricting member selectively connects with the handle and the main bar member in order to fix the handle.