Rail Charging Arm Docking With Screw-Driven Telescopic Motion
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Solution Overview
Problem
Existing automatic charging devices for heavy rail traction vehicles rely on scissor structures for horizontal motion, which are bulky, unreliable, and costly due to insufficient rigidity and high weight, leading to poor performance and high manufacturing costs.
Innovation Solution
An automatic charging device utilizing a robotic arm driven by a driving screw assembly, featuring a flexible unit and charging part assembly for precise positioning, with a guide component and contact pressure detection switches to ensure safe and accurate docking, and a sliding assembly for stable movement, reducing bulkiness and cost while enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a scissor structure is used for horizontal motion mechanism, then the charging assembly can move horizontally, but the structure becomes bulky and rigidness is insufficient
Solution Approach 1:
The horizontal motion mechanism is divided into multiple telescopic assemblies, each capable of independent extension and retraction. This segmentation allows the structure to achieve the required horizontal movement while maintaining a more compact overall form compared to a single large scissor mechanism.
Solution Approach 2:
The telescopic assemblies use dynamic extension and retraction to achieve horizontal movement instead of a static scissor structure. The movable connection between the telescopic assemblies allows for adaptive positioning while maintaining structural integrity during operation.
2Weight of moving object
If a scissor structure with heavy lifting assembly is used, then vertical lifting is achieved, but the overall machine becomes bulky and unreliable
Solution Approach 1:
A counterweight block is introduced to balance the weight of the lifting assembly and charging assembly. This counterbalancing mechanism reduces the net weight that the lifting mechanism must support, improving reliability while maintaining the necessary lifting capability.
Solution Approach 2:
The lifting assembly is designed to move primarily in the vertical dimension while the horizontal positioning is achieved through the telescopic assemblies. This separation of motion dimensions allows each mechanism to be optimized independently, improving overall reliability.
3Ease of operation
If two motion mechanisms (lifting and retractable assemblies) are used for positioning, then charging assembly can move in vertical and horizontal directions, but the design becomes complex and costly
Solution Approach 1:
The lifting and horizontal motion functions are integrated through the connection between the telescopic assemblies and the lifting assembly. The telescopic assemblies are mounted on the lifting assembly, allowing coordinated movement in both vertical and horizontal directions through a unified structural design rather than completely separate mechanisms.
Solution Approach 2:
The telescopic assemblies serve multiple functions: they provide horizontal movement, support the charging assembly, and work in conjunction with the lifting assembly for coordinated positioning. This multi-functionality reduces the need for separate dedicated mechanisms for each motion direction.
4Stability of the object's composition
If guide rod and guide groove docking mechanism is added to prevent charging assembly movement, then stability is improved, but device complexity increases
Solution Approach 1:
Instead of using a guide rod that moves within a guide groove, the design uses a guide groove on the charging assembly that receives and guides the guide rod from the fixed component. This inversion allows the guiding function to be integrated into the moving charging assembly rather than requiring a separate guiding mechanism.
Solution Approach 2:
The guide rod acts as an intermediary element between the fixed component and the charging assembly. It provides the necessary guiding and stabilizing function while allowing the charging assembly to move freely in the intended directions, achieving stability without complex constraints.
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
The device provides lightweight, compact, and cost-effective charging with enhanced rigidity, ensuring safe and reliable automatic charging operations in complex environments by facilitating accurate docking and preventing structural damage through elastic components and pressure detection mechanisms.
Implementation Method 1
a driving screw assembly is assembled between the fixed arm and the retractable arm, and the retractable arm may perform a retractable movement relative to the fixed arm under the drive of the driving screw assembly
Implementation Method 2
A first elastic component is fitted on the first connecting rod
Data Source
AI summary
An automatic charging device is particularly suitable for automatically charging a heavy rail tractor, including a box body; a robotic arm, the robotic arm including a fixed arm and a retractable arm, the fixed arm is fitted in the box body, a driving screw assembly is fitted between the fixed arm and the retractable arm, and the retractable arm can be driven by the driving screw assembly to extend and retract relative to the fixed arm; a flexible unit; and a charging part, wherein the charging part is fitted to a retractable end of the retractable arm by means of the flexible unit, the charging part may be driven by the retractable arm to extend from the box body to implement charging, and after the charging is completed, the charging part may retract into the box body.