Robot Tool Drive Bracket Wiring Protection
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Solution Overview
Problem
Existing robot tool drive systems face challenges in efficiently managing control wiring and maintaining a balanced weight distribution, which can lead to increased load on wrist elements during tool movement.
Innovation Solution
A tool drive device with a bracket system that includes a plate-like first attachment part attached to a robot's wrist tip flange and a second attachment part to which motors and a movable part are attached, featuring a wiring-body passage that guides control wiring from the flange to the motors without exposure to the movable part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control wiring body is wired through hollow holes in the flange and bracket, then the wiring can be routed to the motor, but the wiring body is exposed toward the movable part and is susceptible to spatter and dust
Solution Approach 1:
A cable guide member is introduced as an intermediary component between the wiring body and the external environment. This cable guide member receives the wiring body from the hollow hole and guides it to the motor while shielding it from spatter and dust, thus protecting the wiring without complicating the overall structure
Solution Approach 2:
The cable guide member functions as a protective sheath or channel that encloses the wiring body. This flexible or rigid protective covering prevents direct exposure of the wiring to harmful factors like spatter and dust while allowing the wiring to pass through from the flange to the motor
2Device complexity
If the bracket structure is simplified to attach motors and movable part, then the device complexity is reduced, but the weight distribution may become unbalanced increasing load on wrist elements
Solution Approach 1:
The bracket is designed with an asymmetric structure where the first attachment part and second attachment part have different configurations optimized for their specific functions. This asymmetric design allows for balanced weight distribution while maintaining structural simplicity, reducing the load on wrist elements
Solution Approach 2:
The bracket utilizes three-dimensional spatial arrangement to distribute weights effectively. By positioning the first attachment part for the flange and the second attachment part for motors and movable part in different spatial orientations, the design achieves weight balance without increasing structural complexity
3Reliability
If the movable part is disposed on the opposite side from the flange with the first attachment part sandwiched therebetween, then the wiring body can be guided without exposure, but the bracket design becomes more complex
Solution Approach 1:
The first attachment part serves multiple functions: it attaches the bracket to the flange, provides structural support, and guides the wiring body through its integrated passage. This multi-functionality reduces the need for separate wiring channels, thereby simplifying the overall bracket design while ensuring reliable wiring guidance
Data Source
AI summary
A tool drive device including a motor, a movable part driven by the motor to move a tool, and a bracket used to attach the motor and the movable part to a flange at a wrist tip of a robot. The bracket includes a plate-like first attachment part that is attached to the flange and a plate-like second attachment part to which the motor and the movable part are attached. The movable part is disposed on the opposite side from the flange with the first attachment part therebetween in the plate thickness direction thereof and on the opposite side from the motor with the second attachment part therebetween in the plate thickness direction thereof. The first attachment part is provided with a wiring-body passage that guides a wiring body that has been wired through a hollow hole in the flange, to the motor without being exposed toward the movable part.