Pneumatic Lifting Table Frame with Load-Adaptive Gas Spring Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional lifting tables, including manually operated, electrically actuated, and pneumatic types, face issues such as manual strain, energy wastage, noise, fault-proneness, high costs, unsteady lifting/lowering speeds, and potential for injury or damage due to uneven load handling.
Innovation Solution
A pneumatic lifting table frame equipped with a pressure sensor, controller, and adjustable gas spring assembly that adjusts piston rod movement based on load pressure to maintain consistent lifting/lowering speeds, ensuring safety and stability, and incorporates a sealing mechanism to conserve gas and reduce operational costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a gas spring is used to actuate the lifting table, then the cost and noise are reduced, but the lifting/lowering speed becomes unsteady and safety is compromised
Solution Approach 1:
The gas spring system is made dynamic by allowing adjustable gas quantity in the gas reservoir. The controller regulates the motor to adjust the piston rod position, thereby controlling the gas volume in the reservoir and achieving variable thrust force to maintain stable lifting speed under different loads.
Solution Approach 2:
The system implements feedback control by using the pressure sensor to detect load weight, transmitting signals to the controller, which then adjusts the motor-driven piston rod position to regulate gas quantity in the reservoir, creating a closed-loop control system that maintains stable lifting speed.
2Ease of manufacture
If a gas spring is used to actuate the lifting table, then the cost is reduced, but the lifting speed becomes too fast with light load causing injuries or damages
Solution Approach 1:
The pressure sensor provides feedback on load weight to the controller, which then adjusts the gas quantity in the reservoir through motor-driven piston rod adjustment. This feedback mechanism ensures the lifting speed is automatically reduced when light load is detected, preventing injuries or damages.
Solution Approach 2:
The system changes the gas quantity parameter in the reservoir based on detected load weight. When light load is detected, the controller reduces gas quantity in the reservoir, thereby reducing thrust force and controlling lifting speed to prevent injuries or damages to people or objects nearby.
3Force
If the piston rod assembly is pushed inwardly to increase thrust force, then heavy load is balanced, but the gas volume in the gas spring body increases reducing lifting speed
Solution Approach 1:
The gas storage function is segmented between the gas spring body and the gas reservoir. The gas reservoir acts as an adjustable buffer that can store or release gas to the spring body, allowing independent control of thrust force and gas volume to resolve the speed-thrust force trade-off.
4Device complexity
If manual operation is used to adjust the lifting table, then the structure is simple, but the operation becomes strenuous and prone to damage under heavy load
Solution Approach 1:
The manual mechanical operation is replaced with an automated motor-driven system. The motor drives the piston rod assembly to adjust gas quantity in the reservoir based on pressure sensor feedback, automatically providing the required thrust force for heavy loads and eliminating manual strain and transmission assembly damage risks.
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 provides a safe, stable, and comfortable lifting experience with reduced risk of damage, longer service life, and lower operational costs by maintaining uniform lifting/lowering speeds and conserving gas, enhancing practicality and stability.
Implementation Method 1
a pressure sensor configured to detect a load of the lifting table frame, a controller configured to receive a pressure signal from the pressure sensor
Implementation Method 2
the gas in the gas reservoir is partially pressed into the adjustable gas spring body, which increases the pressure in the adjustable gas spring body and thus increases the thrust force against the column
Implementation Method 3
the gas in the gas reservoir is partially pressed into the adjustable gas spring body, which increases the pressure in the adjustable gas spring body
Implementation Method 4
the drive unit drives the piston rod assembly to carry out a piston motion in the gas reservoir
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A pneumatic lifting table frame and a lifting table, relating to the field of lifting mechanisms. The lifting table includes a transverse beam and columns, and further includes a pressure sensor that detects a load of the lifting table frame, a controller configured to receive a pressure signal from the pressure sensor, and an adjustable gas spring assembly configured to drive the columns to be lifted or lowered. The adjustable gas spring assembly includes an adjustable gas spring body, a gas reservoir, a piston rod assembly, and a drive unit. The adjustable gas spring body is connected to the gas reservoir via a gas pipe. The controller is configured to control the drive unit, the adjustable gas spring body is disposed in one of the columns, and the drive unit drives the piston rod assembly to carry out a piston motion in the gas reservoir. The lifting table frame has a better comfort, a longer service life, a higher stability, a stronger practicality, and a lower damage possibility.