Mechanical Joint Compact Layout for Robotic Arm Height Reduction
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Solution Overview
Problem
Traditional mechanical arm designs for self-moving cleaning devices require larger overall height and dimensions due to the arrangement of rotatable joints, limiting their operational range and efficiency.
Innovation Solution
A mechanical joint with a first driving part, rotatable joint, and transmission assembly that allows the rotatable base to rotate relative to the base, reducing the overall height and dimensions by parallel arrangement of components and utilizing a belt transmission assembly, rolling assemblies, and a relocated rotation angle detection mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional mechanical joint arrangement modes are used, then the rotatable base can rotate relative to the base, but the overall height and dimensions of the mechanical arm become larger
Solution Approach 1:
The patent relocates the rotation angle detection mechanism from a vertical arrangement to a horizontal arrangement, changing the spatial dimension of component layout. This allows the detection mechanism to be positioned at the side of the driving part rather than above it, thereby reducing the overall height of the mechanical joint while maintaining full rotational detection capability
Solution Approach 2:
The rotation angle detection mechanism is integrated within the spatial envelope of the driving part assembly. The detection components are nested within or adjacent to the motor housing, utilizing the same spatial footprint without requiring additional vertical clearance, thus achieving compact integration that reduces overall height
2Ease of operation
If traditional mechanical joint arrangement modes are used, then the rotatable base can rotate relative to the base, but the dimensions of the mechanical arm become larger
Solution Approach 1:
The patent merges the rotation angle detection mechanism with the driving part assembly into a single integrated unit. The detection components share the same mounting space and structural support as the motor, eliminating the need for separate mounting areas and reducing the overall footprint of the mechanical joint
Solution Approach 2:
The driving part housing serves multiple functions: it contains the motor, supports the transmission assembly, and provides mounting structure for the rotation angle detection mechanism. This multi-functional design consolidates multiple components into a single compact assembly, reducing the total space required
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
Expands the operational range of the mechanical arm, enhances its autonomous cleaning capabilities, and achieves a compact structure suitable for efficient storage and operation.
Implementation Method 1
a belt transmission assembly
Implementation Method 2
rolling assemblies
Data Source
Figure 1~3
Figure 4~6
Figure 7~9
AI summary
A mechanical joint, which is configured to connect a rotary seat (55) and a base (50) of a mechanical arm (001). The mechanical joint comprises: a first driving portion (110), a rotary joint (120) and a first transmission assembly (130), wherein the first driving portion (110) is arranged on the base (50); the first transmission assembly (130) is configured for being in transmission connection with the first driving portion (110) and the rotary joint (120); the rotary joint (120) is connected to the rotary seat (55); and the first driving portion (110) is configured for driving the rotary joint (120) to rotate by means of the first transmission assembly (130), so as to make the rotary seat (55) rotate relative to the base (50). Further provided are the mechanical arm (001) and a self-moving cleaning apparatus (002).