Height-adjustable rotary fitting for a cabinet comprising a rotating supporting column
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Solution Overview
Problem
Existing height-adjustable rotary fittings for cabinets are difficult to manufacture and install, and they do not allow for precise height-adjustment over a wide range.
Innovation Solution
A rotary fitting with a rotating supporting column featuring a height adjustment device using a screw and nut with a bevel gear, allowing easy adjustment by a screwdriver crosstip, and a top and bottom rotary mount for secure support, along with a sliding bushing and spring-loaded latch for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a height adjustment device with screw and nut is used, then height adjustment precision is improved, but device complexity increases
Solution Approach 1:
The height adjustment device is nested within the main tube, with the screw and nut assembly contained inside the tube structure. This integration reduces the overall device footprint and simplifies the external appearance while maintaining the precision adjustment capability through the threaded connection between screw and nut.
Solution Approach 2:
The bevel gear acts as an intermediary mechanism between the screwdriver crosstip and the height adjustment function. By providing a gear interface, it translates rotational motion from the screwdriver into precise linear adjustment of the shelf height, simplifying the user interaction while maintaining adjustment precision.
2Ease of operation
If a bevel gear with screwdriver crosstip engagement is used, then ease of operation is improved, but manufacturing precision requirements increase
Solution Approach 1:
The bevel gear is designed to accommodate a standard screwdriver crosstip, which is a universally available tool. This allows the height adjustment function to be operated with a common tool rather than requiring a specialized mechanism, improving ease of operation while using standard manufacturing tolerances for the gear teeth.
3Stability of the object's composition
If top and bottom rotary mounts are used for support, then stability is improved, but device complexity increases
Solution Approach 1:
The support structure is segmented into two separate rotary mounts: one at the top end and one at the bottom end of the rotating column. This segmentation allows each mount to independently provide stable support and rotation capability, improving overall stability while keeping each individual mount relatively simple in design.
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
Enables easy and precise height adjustment of shelves within cabinets, facilitating quick and effortless installation and providing stable support for shelves and doors.
Implementation Method 1
The other of the screw and the nut is axially supported along the longitudinal axis within the main tube and has a bevel gear. A guiding hole in the main tube is located adjacent to the bevel gear such that the bevel gear can be engaged and rotated about the longitudinal axis by a screwdriver crosstip inserted into the guiding hole.
Implementation Method 2
The height adjustment device comprises a screw and a nut screwed onto the screw. One of the screw and the nut is fixed to the bottom element and wherein the other of the screw and the nut is axially supported along the longitudinal axis within the main tube.
Implementation Method 3
a spring-loaded latch protruding into a lateral opening of the slot
Data Source
AI summary
A rotary fitting for a cabinet with top and bottom walls comprises a rotating supporting column, a top and a bottom rotary mounts for the supporting column, and at least one shelf to be fixed to the supporting column. The supporting column has a main tube, a bottom element mounted to the main tube, and a height adjustment device for a height of the main tube above the bottom rotary mount. The height adjustment device comprises a screw and a nut screwed onto the screw. One of the screw and the nut is fixed to the bottom element, and the other is axially supported within the main tube and has a bevel gear. There is a guiding hole in the main tube adjacent to the bevel gear, through which the bevel gear can be engaged and rotated by a screwdriver crosstip.