Lifting Column Transmission Assembly with Sleeve-Mounted Vibration Decoupling
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Solution Overview
Problem
Current lifting column mechanisms experience vibration issues due to electric motors, which are directly fixed to the lifted platform, causing unwanted vibrations and affecting user experience and the service life of the components.
Innovation Solution
A transmission assembly for lifting columns is designed with an actuating device securely mounted to the upper end of a sleeve, which transmits vibrations to a first transmission nut and then to the inner tube, rather than directly to the lifted platform, along with features like a gap or flexible top plate to absorb shocks, and a deceleration mechanism using bevel and spur gear planet carriers for smoother power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the actuating device is directly fixed to the lifted platform, then the coupling between the lifting column and the lifted platform is simplified, but the vibration from the electric motor is directly transmitted to the lifted platform, affecting user experience
Solution Approach 1:
The patent introduces an inner tube as an intermediary component between the actuating device and the lifted platform. The actuating device is fixed to the lower end of the inner tube, which is securely coupled to the first transmission nut, while the upper end of the inner tube is movably disposed without direct connection to the top plate. This intermediary structure transmits driving force while isolating vibration, preventing direct transmission to the lifted platform.
2Device complexity
If the actuating device is directly connected to the lifted platform, then the structure is more compact, but the stress from vibration is concentrated on the inner tube, reducing service life
Solution Approach 1:
The inner tube serves as a stress-absorbing intermediary that decouples the vibration source from the lifted platform. By securing the actuating device to the lower end of the inner tube and leaving the upper end movably disposed, the structure distributes stress away from the inner tube body, preventing concentration of vibrational stress and extending service life.
3Productivity
If a rigid connection is used between the actuating device and the lifted platform, then the transmission is more direct, but the vibration and noise are amplified, affecting user experience
Solution Approach 1:
The inner tube acts as a vibration-damping intermediary that maintains transmission efficiency while reducing harmful vibrations and noise. The movable upper end connection allows the inner tube to absorb vibrations during operation, preventing their amplification and transmission to the lifted platform, thus improving user experience without sacrificing productivity.
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 vibration transmission to the lifted platform, minimizes stress on the inner tube, enhances user experience, and improves the service life of the lifting column components by smoothing the lifting process and reducing noise.
Implementation Method 1
a bevel gear planet carrier transmission-fitted with the sun gear, and a spur gear planet carrier fitted with an output end of the bevel gear planet carrier
Implementation Method 2
an exteriorly threaded hollow spindle, a transmission screw disposed in the hollow spindle
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Disclosed are a lifting column transmission assembly and a lifting column that includes an inner tube, the transmission assembly includes: an exteriorly threaded hollow spindle, a transmission screw, a sleeve fitted over the hollow spindle, a guide tube limited in the sleeve, and an actuating device actuating the guide tube to rotate, the guide tube and the hollow spindle being synchronously rotatable and being axially expandable and contractable relative to each other; the transmission screw and the hollow spindle being synchronously rotatable and being axially expandable and contractable relative to each other; the actuating device is disposed in the inner tube and securely mounted to an upper end of the sleeve; and a lower end of the sleeve is securely connected with a first transmission nut that is thread-fitted with the hollow spindle, the first transmission nut being securely coupled to the inner tube, the upper end of the sleeve being movably disposed. Vibration generated by the actuating device is transmitted to the first transmission nut via the sleeve, instead of being directly transmitted to a lifted platform on top of the inner tube, rendering a lighter vibration, a smoother transmission of the transmission assembly, and a lighter vibration during lifting of the lifting column.