Floor Treating Machine Rotary Drive for Shock-Resilient Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing floor treating machines with direct drive connections between the motor shaft and housing are prone to damage from transient loadings and shocks, and lack flexibility in transmission ratios, especially when dealing with rough surfaces.
Innovation Solution
The implementation of two belt/pulley drives in series between the frame and one of the heads, with pulleys of different diameters, allows for indirect drive to the housing and accommodates transient loadings, providing resilience and flexibility in transmission ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a direct drive connection is used between the motor shaft and the housing, then the structure is simple, but the machine is prone to damage from transient loadings and shocks
Solution Approach 1:
The patent introduces an intermediary belt/pulley drive system between the motor shaft and the housing. Instead of direct connection, the motor shaft connects to a head assembly via belt/pulley, and the head assembly then drives the housing through another belt/pulley connection. This intermediary mechanism absorbs shocks and transient loadings, preventing direct transmission of harmful forces while maintaining the drive function.
Solution Approach 2:
The belt/pulley drive system acts as a cushioning mechanism before harmful shocks reach the housing. The belts can stretch and slip slightly under transient loads, providing beforehand cushioning that protects the rigid housing and motor shaft connection from damage while maintaining operational reliability.
2Speed
If pulleys with vastly different diameters are used to reduce rotational velocity, then the desired low rotational velocity of the housing is obtained, but the transmission ratio flexibility is limited
Solution Approach 1:
The patent segments the single large transmission ratio into two smaller transmission stages. Instead of one belt/pulley pair with vastly different diameters, the system uses two belt/pulley pairs with moderate diameter differences. Each stage provides a moderate speed reduction, and the combined effect achieves the desired overall reduction while allowing greater flexibility in selecting appropriate pulley diameters for different operating conditions.
Solution Approach 2:
The dual belt/pulley arrangement allows dynamic adjustment of transmission characteristics. By changing belt tensions, pulley positions, or selecting different pulley combinations in each stage, the system can adapt to different load conditions and floor types, providing versatility that a fixed single-stage transmission cannot achieve.
3Adaptability or versatility
If one or more heads are slowed down on rough floors, then the heads can adapt to the surface, but the overall machine behavior is disturbed in direct drive configurations
Solution Approach 1:
The head assembly acts as an intermediary between the motor shaft and housing. When a head encounters rough flooring and slows down, the belt/pulley connections allow this variation to be absorbed without directly affecting the housing rotation. The intermediary drive system decouples the head speed variations from the housing motion, maintaining overall machine stability while allowing local adaptation.
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
This configuration reduces the risk of damage from shocks and allows for stable operation on rough surfaces while offering a wide range of transmission ratios, ensuring consistent performance and reduced wear and tear.
Implementation Method 1
A first belt (22) is arranged around the frame pulley (21) and the first intermediate pulley (5b)... A second belt (6) is arranged around the second intermediate pulley (5a) and the auxiliary head pulley (7)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A floor treating machine, comprising a frame (20), a housing (8) which is attached to the frame in such a manner that said housing is rotatable about a substantially vertical axis, at least three heads (10) attached to the housing in such a manner that said heads are rotatable about corresponding substantially vertical axes (25), said heads being provided, on their bottom surface, with treating means and/or coupling means for treating means to be coupled to, a power source (1), the shaft (24) of which is concentric with respect to the vertical axis of the frame, which shaft is in driving interaction with the housing and the heads by means of respective transmissions, wherein the transmission between the frame and the housing comprises at least two belt/pulley drives (5a, 5b, 6, 7, 21, 22) which are arranged in series, whereby said at least two belt/pulley drives are arranged in series between the frame and at least one of the heads .