Transmission device for lifting sickbed
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Solution Overview
Problem
Conventional manual transmission devices for sickbeds are cumbersome, require large operation spaces, and have complex structures, making them difficult to operate, connect, remove, and maintain.
Innovation Solution
A simplified transmission device with a one-piece gear seat, cover, power input assembly, and power output assembly, featuring bevel gears and reinforcement ribs, which is fixed to the sickbed and can be driven manually or automatically, reducing material costs and facilitating easy assembly and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional manual transmission device with gear box and universal joint is used, then the sickbed can be lifted and descended, but the operation space is large and the structure is complicated
Solution Approach 1:
The patent combines the gear box, universal joint, and driving shaft into an integrated transmission assembly where the bevel gears directly mesh with the output shaft. This merging eliminates the need for separate universal joints and reduces the number of components, thereby reducing operation space and simplifying the overall structure while maintaining the lifting and descending function.
Solution Approach 2:
The transmission device is segmented into modular components: a transmission housing containing the bevel gears, a separate manual rotation device, and a screw rod assembly. This segmentation allows for compact arrangement of components, reducing the overall operation space required while keeping the structure manageable and maintainable.
2Ease of operation
If a conventional transmission device with gear box is used, then the sickbed lifting function is achieved, but the operation space is large
Solution Approach 1:
The gear box functions are merged directly into the transmission housing with the bevel gears positioned to mesh with the output shaft. This eliminates the need for a separate, space-consuming gear box enclosure, significantly reducing the occupation area while maintaining the gear transmission function for sickbed lifting.
Solution Approach 2:
The bevel gears are nested within the transmission housing, with the input shaft and output shaft arranged in a compact configuration. The manual rotation device connects directly to the input shaft, creating a nested arrangement that minimizes the overall footprint and occupation area of the transmission device.
3Ease of repair
If a conventional transmission device is used, then the sickbed can be lifted, but the device is difficult to remove and maintain
Solution Approach 1:
The transmission device is segmented into easily separable modules: the transmission housing containing bevel gears, the manual rotation device, and the screw rod assembly. Each module can be independently removed and maintained, simplifying repair operations. The cover can be detached to access the bevel gears, and the output shaft can be separated from the screw rod, making maintenance straightforward despite the functional complexity.
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 gear seat, reduces material costs, and enhances the ease of operation, connection, and removal of the transmission device, while ensuring reliable and efficient lifting and descending of the sickbed.
Implementation Method 1
the second bevel gear meshes with the first bevel gear
Data Source
AI summary
A transmission device for lifting a sickbed is fixed on a head mounting or a bed end of the sickbed and contains: a gear seat, a cover, a power input assembly, and a power output assembly. The gear seat includes a first conduit, a second conduit, a first opening, and a receiving orifice. The cover is covered on the first opening of the gear seat. The power input assembly includes an input shaft and a first bevel gear. The power output assembly includes an output shaft, a second bevel gear, and a support element. The support element is rotatably connected with the output shaft. The support element has multiple reinforcement ribs surrounding around an outer wall of the support element and configured to abut against an abutting fence of the second conduit, and the second bevel gear meshes with the first bevel gear.