Transmission rod assembly and a height-adjustable desk thereof
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Solution Overview
Problem
Existing height-adjustable desk transmission rod mechanisms require tools for assembly and disassembly, leading to cumbersome operations and potential loosening over time, causing operational difficulties.
Innovation Solution
A transmission rod assembly utilizing elastic pieces and oblique surfaces for automatic extension and locking, eliminating the need for screws and enabling easy mounting and dismounting through rotational locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If screw structures are used to fixedly connect transmission rod components, then connection strength is improved, but ease of operation deteriorates due to requiring tools and multiple assembly/disassembly steps
Solution Approach 1:
The patent replaces the traditional screw mechanical connection system with a spring-based elastic locking mechanism. The elastic piece deforms to generate locking force, substituting the screw thread mechanical engagement with elastic deformation and friction-based locking, thereby eliminating the need for tools while maintaining connection strength.
Solution Approach 2:
The elastic piece automatically locks the transmission rod components in place through its restoring force without requiring external tools or manual tightening operations. The mechanism serves itself by using the elastic deformation and recovery of the spring to maintain the locked state, eliminating the need for operator intervention during normal operation.
2Stability of the object's composition
If screw structures are used to fixedly connect transmission rod components, then mounting stability is improved, but loss of time increases due to multiple screwing and unscrewing operations
Solution Approach 1:
The elastic piece is pre-installed in the elastic cavity with its one end abutting the first transmission head and the other end abutting the second transmission head. This preliminary positioning ensures that when the transmission rod is inserted, the elastic piece is already in the correct position to immediately engage and lock the components, eliminating the need for time-consuming screw tightening operations.
Solution Approach 2:
The patent replaces the time-consuming screw tightening and loosening operations with a rapid elastic locking mechanism. The spring-based system achieves stable mounting through elastic deformation and friction locking, reducing the mounting process from multiple screw operations to a single insertion and locking action.
3Reliability
If screw structures are used to connect transmission rod components, then initial connection reliability is improved, but reliability deteriorates over time due to screw loosening
Solution Approach 1:
The elastic piece continuously maintains locking force through its inherent restoring force, automatically compensating for any dimensional changes or wear in the transmission rod components over time. This self-adjusting mechanism ensures consistent connection reliability throughout the service life without requiring periodic tightening or maintenance interventions.
Solution Approach 2:
The patent transitions from a static screw connection to a dynamic elastic locking system. The elastic piece can deform and adjust its locking force in real-time, adapting to thermal expansion, contraction, and wear of the components. This dynamic adjustment capability maintains reliable connection over extended service durations, preventing the loosening issues characteristic of fixed screw connections.
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
Facilitates convenient and efficient assembly and disassembly of the height-adjustable desk by eliminating the need for tools and reducing the risk of mechanical failure due to loosening.
Implementation Method 1
an elastic piece, abutted against the first transmission head or the second transmission head, where the second transmission head and the first transmission head are abutted against each other in an axial limiting manner by use of a restoring force of the elastic piece
Implementation Method 2
the positioning groove has at least one first oblique surface, the positioning block has at least one second oblique surface, and the first oblique surface and the second oblique surface are abutted against each other
Data Source
AI summary
A transmission rod assembly for a height-adjustable desk comprises: a first transmission head having positioning grooves; a second transmission head having positioning blocks; an elastic piece axially limiting abutment of the first and second transmission heads, the positioning blocks positioning respective positioning grooves; a sleeve pipe having an end mounted to the second transmission head, the elastic piece being mounted in the sleeve pipe, and an end of the elastic piece abutting the second transmission head; a first transmission rod having an end protruding into the other end of the sleeve pipe and abutting the other end of the elastic piece, the sleeve pipe limiting the first transmission rod; and a locking assembly mounted on the other end of the sleeve pipe, the locking assembly limiting the sleeve pipe and clamping the first transmission rod. Thus, mounting can be completed by elastic squeeze, bringing simple structure and easy operation.