Rack-Driven Antenna Transmission Structure for Compact Precise Motion
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Solution Overview
Problem
Existing base station antenna transmission devices require a large space, have high manufacturing costs, and suffer from poor precision in transmission control due to complex components and assembly issues.
Innovation Solution
The antenna transmission device incorporates a shell with sliding output units and input units that mesh with a rack to enable linear movement, utilizing a compact design with fewer components, including a fixed rotation transmission member and input motor, to reduce space and improve precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screw and nut transmission device is used, then the transmission function is achieved, but the device occupies large space and has high manufacturing cost
Solution Approach 1:
The patent merges the screw and nut into an integrated spiral transmission structure where the spiral groove is directly formed on the transmission rod surface, eliminating the need for separate screw and nut components. This integration reduces the overall device volume while maintaining the transmission function through the spiral groove guiding the transmission rod's linear movement.
Solution Approach 2:
The transmission rod is nested within the cover body, with the spiral groove formed on the transmission rod surface. The output member contains both the transmission rod and spiral groove in a nested configuration, allowing the transmission mechanism to occupy minimal space within the antenna cover body while achieving the required transmission distance.
2Reliability
If a screw and nut transmission device is used, then the transmission function is achieved, but the manufacturing cost is high
Solution Approach 1:
The patent combines multiple components (screw, nut, sliding rail, stop piece) into a single integrated transmission rod with a spiral groove. This reduction in component count simplifies manufacturing processes, reduces assembly steps, and lowers overall manufacturing cost while maintaining reliable transmission function through the spiral groove mechanism.
Solution Approach 2:
The patent extracts and eliminates unnecessary components from the traditional screw-nut transmission system, retaining only the essential spiral groove structure on the transmission rod. This extraction of redundant parts reduces manufacturing complexity and cost while preserving the core transmission functionality.
3Device complexity
If a sliding rail chute is used to guide the nut, then the transmission structure is formed, but the cooperation is poor and precision control is difficult
Solution Approach 1:
The patent merges the sliding rail chute and nut guidance functions into the spiral groove formed directly on the transmission rod surface. The spiral groove itself serves as the guiding structure, eliminating the need for separate sliding rail chutes and improving precision control through direct geometric constraint of the transmission rod's movement path.
4Ease of manufacture
If a snap or connection member is used in the output member, then the assembly is completed, but the assembly precision is poor due to contact length
Solution Approach 1:
The patent extracts and eliminates the snap or connection member from the output member design. The spiral groove structure on the transmission rod directly provides the necessary assembly and positioning function without requiring additional connection elements, thereby improving assembly precision by removing the source of precision degradation.
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
This design reduces the overall size of the transmission device, lowers manufacturing costs, and enhances transmission control precision, allowing for flexible application and efficient antenna arrangement.
Implementation Method 1
The input unit is at least partially arranged in the shell, meshes with the rack of the output unit, and is configured to drive the output unit to move linearly
Data Source
AI summary
An antenna transmission device includes a shell, an output unit, and an input unit. The output unit is slidingly arranged at the shell and includes a rack. The input unit is at least partially arranged in the shell, meshes with the rack of the output unit, and is configured to drive the output unit to move linearly.