Lifting Column Screw Transmission Assembly With Simplified Telescoping Drive
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional lifting column transmission assemblies are complex and demanding in terms of manufacturing and assembly due to the need for high precision and intricate spline systems, making them difficult to produce and assemble.
Innovation Solution
A simplified transmission assembly featuring a first and second screw rod with a synchronously rotatable and axially extensible transmission sleeve, where both ends are fixed, eliminating the need for inner splines and bearings, and utilizing an electric motor-driven actuating device for rotation, with threaded connections and a locking structure for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a three-stage transmission with guiding tube, larger screw rod, and smaller screw rod is used, then the lifting column achieves height adjustability and moving convenience, but the manufacturing precision requirement becomes high and the manufacturing procedure becomes complicated
Solution Approach 1:
The transmission assembly is divided into three independent screw rods (first, second, and third) that can be manufactured separately with standard precision requirements. Each screw rod operates independently within its own transmission sleeve, avoiding the need for high-precision multi-stage coupling required in conventional designs.
Solution Approach 2:
The first, second, and third screw rods are nested within transmission sleeves in a telescopic arrangement. The first transmission sleeve contains the first screw rod, the second transmission sleeve contains the second screw rod and is disposed on the first screw rod, and the third transmission sleeve contains the third screw rod and is disposed on the second screw rod. This nested structure reduces manufacturing complexity while maintaining functionality.
2Ease of operation
If a three-stage transmission with multiple screw rods and splines is used, then the lifting column achieves height adjustability, but the assembling process becomes highly demanding and complex to assembly
Solution Approach 1:
The transmission system is segmented into independent modular units, each consisting of a screw rod and its corresponding transmission sleeve. This segmentation allows for simplified assembly where each module can be assembled and tested independently before integration, significantly reducing the overall assembling process complexity.
Solution Approach 2:
The nested telescopic structure of transmission sleeves and screw rods enables a straightforward assembly sequence where components are simply nested into each other in a hierarchical manner, reducing the need for complex alignment procedures and multi-step assembly operations.
3Reliability
If conventional transmission assembly with multiple splines is used, then the lifting function is achieved, but the structure becomes complex and time-consuming to manufacture
Solution Approach 1:
The complex spline systems and guiding tube structures from conventional designs are extracted and replaced with simpler threaded connections between screw rods and transmission sleeves. This extraction of unnecessary complexity maintains the lifting function while significantly reducing manufacturing time and工序 complexity.
Solution Approach 2:
Instead of using splines for transmission as in conventional designs, the invention inverts the approach by using threaded connections where the screw rods engage with transmission sleeves through threads. This inversion simplifies the manufacturing process while maintaining reliable force transmission for the lifting function.
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 solution simplifies the manufacturing and assembly process, reduces the minimum length of the transmission assembly, increases the extensible distance, and provides reliable fixation and reduced likelihood of loosening, resulting in a more efficient and cost-effective lifting column system.
Implementation Method 1
both ends of the second transmission sleeve are in threaded transmission connection with the first screw rod and the second screw rod, respectively
Data Source
AI summary
A transmission assembly and a lifting column are provided. The transmission assembly includes a first screw rod, a second screw rod, a first transmission sleeve sleeved over the first screw rod, and an actuating device for driving the first transmission sleeve to rotate. An end of the first screw rod proximal to the actuating device is fixed, and an end of the second screw rod distant from the actuating device is fixed. A second transmission sleeve is disposed between the first screw rod and the second screw rod, the second transmission sleeve and the first transmission sleeve are synchronously rotatable and are axially extensible and retractable relative to each other, and both ends of the second transmission sleeve are in threaded transmission connection with the first screw rod and the second screw rod, respectively.