Rotary Draw Bar with Telescopic Jumping Bead Lock
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Solution Overview
Problem
Conventional draw bars for pulling cases or bags cannot rotate relative to their perpendicular plane, limiting the movement of cases or bags to a tilt state and failing to maintain pets in a horizontal position, and existing rotary draw bars are complex, costly, and unreliable with limited telescopic extension.
Innovation Solution
A rotary draw bar with a hollow, rectangular telescopic rod using a rabbet joint linkage and jumping bead device, allowing for adjustable rotation and section length, featuring a simple structure, reliable operation, and reduced space occupancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional draw bars are used, then the structure is simple, but the draw bar cannot rotate and can only move cases or bags in a tilt state
Solution Approach 1:
The draw bar is designed with a telescopic rod that can rotate relative to the fixed base through a rotary shaft, transforming the static conventional draw bar into a dynamic structure capable of both telescopic extension and rotation. This allows the case or bag to be pulled in horizontal state rather than only tilt state, resolving the contradiction between simplicity and rotation capability.
Solution Approach 2:
The telescopic rod is divided into multiple sections that can extend and contract independently. This segmentation allows the draw bar to achieve variable length while maintaining rotation capability, providing adaptability without excessive complexity in the rotary mechanism.
2Length of moving object
If existing rotary draw bars with one-section telescopic rod are used, then rotation is possible, but the extension in length is limited
Solution Approach 1:
The telescopic rod is divided into multiple sections that can extend and contract independently. This segmentation allows the draw bar to achieve variable length while maintaining rotation capability, providing adaptability without excessive complexity in the rotary mechanism.
3Adaptability or versatility
If existing rotary draw bars with complex rotary structure are used, then rotation is achieved, but the cost is high and reliability is low
Solution Approach 1:
The jumping bead device automatically engages with positioning holes on the fixed base to lock the telescopic rod at specific rotation angles. This self-locking mechanism eliminates the need for complex external locking systems, reducing cost and improving reliability while maintaining rotation capability.
Solution Approach 2:
The jumping bead acts as an intermediary element between the telescopic rod and the fixed base, providing a simple yet effective locking mechanism. The bead engages with positioning holes to secure rotation angles without requiring complex rotary structures, thereby improving reliability and reducing cost.
4Adaptability or versatility
If the telescopic rod is extended for rotation, then the adjustment range is increased, but the space occupied is larger
Solution Approach 1:
The telescopic rod can dynamically adjust its length by extending when rotation is needed and retracting when not in use. This dynamic adjustment allows the draw bar to provide full position adjustment capability while minimizing space occupancy during storage or non-use periods.
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 the rotary draw bar to efficiently adjust the position of cases or bags to a horizontal state while minimizing space and cost, with a reliable and versatile design that can change the number of telescopic sections.
Implementation Method 1
a spring (413) positioned in a spring hole of the support (411). The other end of the jumping bead (414) is exposed radially out of the hollow rod (41).
Data Source
AI summary
A rotary draw bar used for drawing a case comprises a fixed rod (1), a fixed base (21, 22), a rotating shaft (3) and a telescopic rod (41, 42). One end of the fixed rod (1) is connected with the fixed base (21, 22). The rotating shaft (3) is arranged in an internal cavity of the fixed base (21, 22) and rotatably matches with the internal cavity. The telescopic rod (41, 42) is a hollow rod, of which a front end is in linking connection with the rotating shaft (3). A jumping bead device is arranged in a central hole at the front end of the telescopic rod (41, 42), and comprises a support (411), a push rod (412), a spring (413) and jumping beads (414). The support (411) is arranged in the central hole. The push rod (412) is arranged on the support (411) and slidingly matches with the support (411). The spring (413) is arranged inside the support (411). One end of the jumping bead (414) is connected with the spring (413), and another end of the jumping bead (414) is exposed out of the telescopic rod (41, 42). The fixed base (21, 22) comprises an inclined surface for the jumping bead (414) to slidingly contact and a location hole for the jumping bead (414) to be embedded in.