Electric lifting device
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Solution Overview
Problem
Existing furniture with multiple driving mechanisms for height adjustment suffers from poor consistency and high cost due to mutual interference and complexity.
Innovation Solution
An electric lifting device utilizing a single driving mechanism with two transmission mechanisms connected through a transmission bar assembly, featuring bevel gears and bearings to ensure synchronous lifting of legs, reducing complexity and cost while maintaining consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple driving mechanisms are used to lift legs, then lifting function is achieved, but consistency and reliability deteriorate due to mutual interference
Solution Approach 1:
The patent merges multiple driving mechanisms into a single driving mechanism that controls all lifting legs through a shared transmission system. The driving mechanism includes a motor connected to a transmission assembly with gears that distribute motion to multiple legs, eliminating mutual interference while maintaining lifting functionality across all legs.
Solution Approach 2:
The transmission assembly is segmented into multiple transmission mechanisms, each responsible for driving a specific lifting leg. Each transmission mechanism includes its own gear set and transmission bar, allowing independent control of each leg while being driven by a single motor through the shared transmission assembly.
2Reliability
If multiple driving mechanisms are adopted, then lifting capability is provided, but cost increases due to more components
Solution Approach 1:
The patent combines multiple driving functions into one driving mechanism, reducing the total number of motors and control units needed. The single driving mechanism shares a common motor and control system, significantly reducing component count and manufacturing cost while maintaining the ability to lift multiple legs consistently.
Solution Approach 2:
The single driving mechanism is designed with universal functionality to control all lifting legs through the transmission assembly. The transmission mechanism can be configured to drive multiple legs simultaneously, making the system multi-functional without requiring separate dedicated drivers for each leg.
3Device complexity
If a single driving mechanism is used, then device complexity is reduced, but synchronous lifting of multiple legs must be ensured through transmission mechanisms
Solution Approach 1:
The transmission assembly acts as an intermediary between the single driving mechanism and multiple lifting legs. It includes transmission bars and gear sets that distribute and synchronize motion from the single motor to all legs, automatically ensuring synchronous lifting without complex control systems.
Solution Approach 2:
The transmission mechanism uses spatial arrangement of gears and transmission bars in three-dimensional space to distribute power to multiple legs. The bevel gears and angled transmission bars create a spatial power distribution system that simplifies control while achieving synchronous motion across multiple dimensions.
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 achieves consistent and reliable synchronous lifting of multiple legs with reduced components, lowering the difficulty in control and overall cost, enhancing adaptability and applicability in furniture like lifting tables and beds.
Implementation Method 1
at least one first driving gear rotationally mounted inside the gearbox, and the first driving gear coaxial with and relatively fixed with a part of the transmission bar assembly stretching into the transmission mechanism; at least one second driving gear mutually engaged with the first driving gear
Implementation Method 2
an axis of each bearing may be coincident with an axis of the corresponding driving gear, and an inner race of each bearing may be relatively fixed with the cooperating driving gear
Data Source
AI summary
An electric lifting device includes one driving mechanism and at least two transmission mechanisms, the two transmission mechanisms cooperating mutually and connected through a transmission bar assembly, with one transmission bar assembly driven by the driving mechanism. Each transmission mechanism includes a gearbox, a first driving gear, a second driving gear with axes of the first and second driving gears being crossed vertically, and lifting table legs disposed below at least two of the transmission mechanisms and driven by the second driving gear of the corresponding transmission mechanism to be lifted synchronously. The present invention employs only one driving mechanism, and with respect to the structure employing multiple driving mechanisms, the electric lifting device in the present invention can not only prevent interference to guarantee higher consistency, but also reduce devices to lower the difficult in control, thereby significantly reducing the cost.