Telescopic Rod Pushrod Abutment and Integrated Steering
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Solution Overview
Problem
The control rod of telescopic rods in prior art cannot accurately abut the controlled part of the sleeving fastener, leading to reduced controllability, and electric luggage boxes with external steering devices are inconvenient to store due to increased volume.
Innovation Solution
A telescopic rod design featuring a pushrod with an abutment unit that can accurately lock and unlock the positioning mechanism, combined with an internal limiting structure for precise movement, and an electric luggage box with a steering device integrated into the box body to reduce volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the control rod's abutting area is enlarged to fill the entire cross-sectional area of the pull rod, then the accuracy of the control rod abutting the controlled part of the sleeving fastener is improved, but the device complexity increases and it cannot accommodate recessed controlled parts
Solution Approach 1:
The control rod is segmented into a rod body and a separate abutting component (such as an abutting block or abutting end). This abutting component can be independently shaped to match the controlled part's geometry, whether protruding or recessed, without requiring the entire control rod to have an enlarged cross-sectional area. The segmentation allows the abutting portion to be optimized for accuracy while keeping the rod body simple.
Solution Approach 2:
An intermediary abutting component is introduced between the control rod and the controlled part of the sleeving fastener. This intermediary element serves as a mediator that can accurately engage with both protruding and recessed controlled parts, eliminating the need for the control rod itself to have a complex enlarged structure. The intermediary component translates the control rod's movement into precise abutment force.
2Adaptability or versatility
If the steering device is mounted outside the box body to enable steering function, then the steering capability is improved, but the volume of the electric luggage box increases making it inconvenient to store
Solution Approach 1:
The steering device is nested within the box body structure, with the steering rod positioned inside the hollow space of the pull rod or integrated into the box frame. The steering handle may extend outward while the mechanical components are contained within the existing volume. This nesting approach allows the steering function to be incorporated without significantly increasing the external dimensions of the luggage box.
Solution Approach 2:
The pull rod structure is given multiple functions: it serves both as a telescopic handle for pulling/pushing the luggage and as a housing for the steering mechanism. The controlled part of the sleeving fastener on the pull rod is designed to engage with both the telescopic locking mechanism and the steering operation, making the same structural element serve dual purposes and eliminating the need for separate dedicated steering components that would increase volume.
Data Source
AI summary
The present disclosure relates to a telescopic rod, a steering device and an electric luggage box. The telescopic rod comprises a hollow first tube, a second tube sleeved outside the first tube and being slidable relatively to the first tube, a positioning mechanism configured to lock and unlock the first tube in position relative to the second tube, and a control member configured to control the positioning mechanism to lock and unlock in position, wherein the positioning mechanism comprises a pushrod connected to the control member and movable in the first rube, an abutment unit provided at a bottom end of the pushrod, and a positioning unit adapted for being abutted by the abutment unit for locking and unlocking in position; the first tube has a limiting structure provided therein, for limiting a space for movement of the abutment unit. The steering device comprises a handle and the afore-mentioned telescopic rod connected to the handle. The electric luggage box comprises a ridable box body, a front wheel and a rear wheel mounted on the box body, and the afore-mentioned steering device for steering the front wheel.