Horizontal Articulated Robot Height Reduction via Gear Stacking
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Solution Overview
Problem
Existing horizontal articulated robots have a high height dimension due to the superimposed positioning of reduction gears, which limits their compactness and efficiency in two-dimensional movement.
Innovation Solution
The arrangement of a first motor and first reduction gear above the base, with a second motor and second reduction gear positioned below, allows for a lower placement of the second reduction gear, reducing the overall height and enabling a more compact design by overlapping the gears in the vertical direction, and using a flexible or fixed cable conduit to manage cable twist.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If reduction gears are superimposed in the vertical direction, then the robot achieves compact horizontal footprint, but the total height becomes large
Solution Approach 1:
The patent switches from vertical stacking (superimposing reduction gears in the vertical direction) to horizontal arrangement (placing reduction gears side-by-side in the horizontal direction). This dimensional change allows the robot to maintain a compact horizontal footprint while significantly reducing the total height, as the reduction gears no longer extend the vertical dimension.
2Device complexity
If the second reduction gear is placed below the first reduction gear, then the cable conduit can be simplified, but the overall height is reduced
Solution Approach 1:
The patent repositions the second reduction gear from a location above the first reduction gear (vertical superposition) to a location below the first reduction gear in the horizontal plane. This spatial reconfiguration simplifies the cable conduit routing by eliminating the need for an inverted J-shaped conduit, while also contributing to the overall height reduction.
Data Source
AI summary
A horizontal articulated robot including a base, a first arm provided above the base so as to be capable of rotating about a first axis, a first driving part configured to cause the first arm to rotate with respect to the base, a second arm attached so as to be capable of rotating about a second axis, and a second driving part configured to cause the second arm to rotate with respect to the first arm. The first driving part includes a first motor and a first reduction gear that are arranged in series along the first axis. The second driving part includes a second motor and a second reduction gear which are arranged in series along the second axis. A lower surface of the second reduction gear is disposed at a position lower than an upper surface of the first reduction gear.