Base Station Antenna Drive Layout for Compact High-Force Adjustment
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Solution Overview
Problem
Existing transmission mechanisms for base station antennas are too large and lack efficient axial force, making them unsuitable for small base station antennas, and require complex assembly and disassembly processes.
Innovation Solution
A compact transmission mechanism with a gear assembly and screw system, where the motor and screw are arranged parallel to each other, allowing for a smaller length and increased axial force, and features a mounting plate for quick assembly and disassembly, along with an anti-rotation element to prevent movable parts from rotating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a traditional transmission mechanism is used for base station antenna, then the axial force is sufficient, but the length is too large and cannot fit in small base station antennas
Solution Approach 1:
The patent changes the spatial arrangement from series (motor→screw) to parallel configuration by introducing a gear assembly as intermediary. The motor drives the first gear, which drives the second gear connected to the screw, transforming the transmission path from linear to two-dimensional layout, thereby reducing the axial length while maintaining force transmission capability through gear mechanical advantage
Solution Approach 2:
The gear assembly acts as an intermediary between the motor and the screw. Instead of direct connection, the motor drives the first gear, which meshes with the second gear that connects to the screw. This intermediary gear system enables compact spatial arrangement while preserving and even amplifying the axial force through gear ratio multiplication
2Length of moving object
If a compact transmission mechanism is designed, then the length is reduced, but the assembly and disassembly process becomes more complex
Solution Approach 1:
The transmission mechanism is divided into distinct modular segments: motor module, gear assembly module (with first and second gears), screw module, and support element module. Each module can be independently manufactured and assembled, simplifying the overall assembly and disassembly process despite the compact integrated design. The gear assembly itself is segmented into meshing gear pairs that can be separately handled
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 mechanism achieves a 50% reduction in length, provides enhanced axial force for precise phase shifter adjustment, and allows for quicker assembly and disassembly, meeting the demands of small base station antennas.
Implementation Method 1
a screw, where a first end of the screw is connected to the second gear and a second end of the screw is rotatably supported by a support element so that the screw is rotatable under driving of the second gear; a movable element mounted on the screw, the movable element being fixedly connected to one end of a connecting rod and configured to translate along an axial direction of the screw when the screw rotates
Implementation Method 2
a gear assembly including a first gear and a second gear meshed with each other, where an output end of the output shaft is connected to the first gear and drives the first gear to rotate
Data Source
AI summary
The present disclosure relates to a transmission mechanism for a base station antenna, including: a motor having an output shaft; a gear assembly including a first gear and a second gear meshed with each other, an output end of the output shaft connected to the first gear and driving the first gear to rotate; a screw, a first end thereof connected to the second gear and a second end thereof rotatably supported by a support element; a movable element mounted on the screw, fixedly connected to one end of a connecting rod and translating along an axial direction of the screw when the screw rotates, thereby driving the connecting rod to translate along the axial direction; and an anti-rotation element configured to cooperate with the movable element to prevent the movable element from rotating with the screw, where the motor and the screw are configured to be arranged parallel to each other on a same side of the gear assembly. The transmission mechanism of the present disclosure can have a smaller length, can provide greater axial force to the connecting rod, and/or can be assembled and disassembled more quickly.