Sliding Door Running Gear Elastic Mounting Noise Reduction
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Solution Overview
Problem
Existing sliding door running gear systems are complex and costly, with dimensional inaccuracies leading to noise and increased wear due to imprecise concentricity of rollers and high component counts.
Innovation Solution
A simplified running gear system featuring an elastic mounting mechanism in a threaded bush and elastically damped roller shafts, with a spindle-based height adjustment and lubricant supply through fine slits to reduce noise and wear, allowing for fewer parts and easier assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional rigid mounting of rollers is used, then assembly is simple, but rolling noise propagates to the cabinet and wear increases
Solution Approach 1:
The patent applies beforehand cushioning by incorporating an elastic mounting mechanism in the threaded bush that dampens rolling noises before they propagate to the cabinet. The elastic elements are pre-installed to absorb vibrations and reduce noise transmission, addressing the harmful factor in advance rather than requiring additional noise control measures.
Solution Approach 2:
The elastic mounting mechanism acts as an intermediary between the rigid components (threaded bush and mounting structure), providing vibration isolation and noise reduction while maintaining the structural connection. This intermediary element resolves the contradiction by introducing damping without significantly complicating the overall mounting system.
2Manufacturing precision
If dimensional inaccuracies are not compensated, then manufacturing is simpler, but noise and wear increase due to imprecise concentricity
Solution Approach 1:
The patent applies parameter changes by using an elastic mounting mechanism that allows for dimensional compensation. The elastic elements can deform to accommodate variations in manufacturing tolerances, enabling the system to achieve proper concentricity without requiring extremely tight manufacturing controls or complex adjustment mechanisms.
3Reliability
If friction and wear are not reduced, then the structure is simpler, but durability decreases and maintenance increases
Solution Approach 1:
The patent applies self-service by incorporating fine slits in the carriage carrier that automatically supply lubricant to the roller shafts during operation. The lubricant is distributed through capillary action or pressure from the slits, providing continuous lubrication without requiring external lubrication systems, manual intervention, or complex delivery mechanisms.
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 significantly reduces rolling noise propagation to the cabinet, minimizes wear, and lowers production costs by using fewer components and improving assembly efficiency.
Implementation Method 1
Thanks to an elastic mounting in a threaded bush, which is used in the drive carrier, rolling noises caused by imprecise concentricity of the rollers can be kept away from the sliding door and thus their propagation to the cabinet can be reduced
Implementation Method 2
Alternatively or additionally, the shafts to which the rollers are fastened can be mounted on the drive carrier in an elastically damped manner
Implementation Method 3
A lubricant can be supplied through fine slits in the bores for the shafts carrying the rollers on the carriage carrier, thus reducing the friction and wear between the rollers and the carriage carrier
Data Source
Figure 1
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Figure 4
AI summary
The running gear (1) for a sliding door comprises a running gear holder (15) for at least one pair of rollers (17), and a mounting housing (13), within which a spindle (27) is retained so as to be axially immovable while meshing with a threaded bore (47) in the running gear holder (15). The vertical position between the sliding door (5) and the top of the cabinet can be adjusted by changing the distance between the mounting housing (13) and the running gear holder (15) as the control gear (29) is rotated.