Variable-Diameter Multi-Hole Spray Gun for Complex Surface Coating
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Solution Overview
Problem
Traditional spraying robots with rigid spray guns struggle to efficiently spray multi-color complex patterns on non-flat surfaces, including narrow corners and internal cavities, due to a lack of flexibility and adjustability in gun shape and diameter.
Innovation Solution
A rigid-flexible coupled multi-hole spray gun device with a deformable bracket, featuring elastic split-bodies and a twin threaded rod system, allows for bending, telescoping, and variable diameter adjustments, driven by dual-output motors and rotating drive units, enabling precise and adaptable spraying on complex surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If rigid spray guns are used for traditional spraying robots, then the structure is simple and stable, but the spray gun cannot deform or adjust posture to spray narrow corners and internal surfaces
Solution Approach 1:
The spray gun is divided into multiple rigid sub-bodies (first rigid sub-body, second rigid sub-body, etc.) connected by flexible connectors. This segmentation allows each segment to move independently, enabling the spray gun to deform and adapt to complex surfaces while maintaining structural stability through the rigidity of individual segments.
Solution Approach 2:
The spray gun incorporates dual-output motors and flexible connectors that enable dynamic posture adjustment and deformation. The motors drive the rigid sub-bodies to rotate and reposition relative to each other, allowing the spray gun to adapt its shape and orientation in real-time to match the contours of workpieces with narrow corners and internal surfaces.
2Adaptability or versatility
If rigid spray guns with fixed diameter are used, then the manufacturing is simple, but the spray gun cannot change diameter to spray multi-color complex patterns efficiently
Solution Approach 1:
The spray gun incorporates variable diameter capability through its deformable structure. The rigid sub-bodies can rotate and reposition relative to each other under motor control, changing the effective spray diameter dynamically. This allows the same spray gun to switch between different spray patterns (e.g., single-color wide spray vs. multi-color narrow spray) without physical replacement.
Solution Approach 2:
The deformable spray gun structure serves multiple functions: it can adjust its diameter, change its posture, and adapt to various surface geometries. This multi-functionality eliminates the need for multiple specialized spray guns, allowing a single device to handle diverse spraying tasks including multi-color complex patterns, narrow corners, and internal surfaces.
3Ease of operation
If the spray gun structure is fixed, then the operation is simple, but it is impossible to implement bending and telescoping to reach narrow corners and inner cavities
Solution Approach 1:
The spray gun is segmented into multiple rigid sub-bodies connected by flexible connectors, allowing each segment to move independently. This segmentation enables the spray gun to bend and telescope by rotating individual segments relative to others, improving accessibility to narrow corners and inner cavities while maintaining operational simplicity through automated motor control.
Solution Approach 2:
The spray gun incorporates dynamic deformation capabilities through dual-output motors that drive the rigid sub-bodies to rotate and reposition. This allows the spray gun to automatically adjust its shape and length to reach difficult-to-access areas, enhancing ease of operation for complex geometries while the automation minimizes the operational complexity for the user.
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
Enhances the flexibility and adaptability of the spray gun to complex environments, allowing for efficient multi-color spraying on both external and internal surfaces of workpieces, improving precision and operation efficiency.
Implementation Method 1
a twin threaded rod (102) is arranged between two adjacent rigid-flexible coupled elastic split-bodies (101) along a circumferential direction, threads of the twin threaded rod (102) are divided into two threaded segments with opposite rotating directions, the two threaded segments of the twin threaded rod (102) are rotatably installed in the two corresponding rigid-flexible coupled elastic split-bodies (101) respectively
Implementation Method 2
each of the rigid-flexible coupled elastic split-bodies (101) is deformable in bending and elastic telescoping, and is restored to an original shape of the rigid-flexible coupled elastic split-body under an elastic action
Data Source
AI summary
A rigid-flexible coupled multi-hole spray gun device with variable size for a spraying robot is disclosed in the present disclosure, which is relates to the field of the spraying robot. The spray device includes a rigid-flexible coupled deformable bracket, a spray head assembly and a spray gun base. The rigid-flexible coupled deformable bracket is configured to connect the spray head assembly and the spray gun base. The spray gun is controlled by the motor to implement the deformation with the axial telescopic and the axial bending, as well as the deformation in increasing or decreasing the cross-sectional area. The partitioned spray holes of the spray head assembly is matchable with the change of the diameter of the elastic paint supply pipe to adjust the spraying width of the spray gun. A driving unit and a paint supply assembly are arranged in the spay gun base.