solidworks design project

TRI’n Grab 2AC3 SolidWorks Design ProjectPerformed by: Alexander Zygmunt | Chris Basalo

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Assignment and Solution

ProblemDesign and model an original “Gripper” concept with SolidWorks CAD using the tools and concepts learned in 2AC3. The design must comply with an Arm Adapter and Motor, provided by the professor, while utilizing 5 rotations at 60rpm in order to grip the following 3 items:• Cube• Triangular Prism• Cyclinder

SolutionA minimalistic collapsing triangle design to achieve maximum performance and functionality while minimizing material, mass, and complexity.

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Presented by: Chris

Mechanism Design

Design• Simplistic and minimalistic “collapse” design to accommodate the limited operating range.• A modest triangle that collapses in order successfully grasp an object of any shape.• Using multiple gears to simultaneously collapse both sides of the triangle at an equal rate.

Basic Functionality• To transfer the rotation from the motor to a multitude of gears. Using gear ratio analysis• The motor rotates the small 10 tooth center gear, which through chains transfers it’s power to larger

gears through 2 chains. • 5 rotations (1800° of rotation) is cut down to a maximum rotation of 45° at the arms, through gear

ratios. • Pads on arms and base provide sufficient surface contact to grip various objects• Measurements: 190mm across the arm base, 116mm from adapter plate and 87mm extension from

base when open.• Total Weight of 232.64g

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Presented by: Chris and Alex

4Gearing

Motor attached to a 10 tooth gear, which then attaches to 100 tooth gears on both sides (through chains). These are locked to a 25 tooth gear, which againmeshes with another 100tooth gear, attached to thearms.

*Chains not included

Presented by: Alex

Chris’ Contribution

• Design and modelling of the TRI’n Grab base body and motor casing• Created attachment assembly from the Arm Interface to the Motor to the TRI’n Grab• Design and modelling of the simulation stage and theoretical arm• Performed Fitting Simulation• Assisted in the Motion Analysis of the TRI’n Grab • 16 Hours of work input into TRI’n Grab

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Presented by: Chris

Approx. 5 Hours

Approx. 2 Hours

Alex’s Contribution

• Came up with gripper arms and base, along with designing the gearing.

• Animated the function of the gripper [Sensor Based] (no actual grabbing, just got it to work)

• Assisted with final animations• 16 Hours of work input into TRI’n Grab

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Presented by: Alex

Approx. 6 Hours

CAD Model Quality 7


Assembly/Disassembly 8


Functionality 9

While including a theoretical chain connecting the motor in the center to the outer gears, the triangle arms slide into each other, creating a collapsing effect in which it grabs any of the 3 shapes provided.

OPEN CLOSED

Bill of Materials 10


Self Improvement and Problems

Chris• Design a slimmer body to prevent interference with object being picked up.• Design a more aesthetically pleasing model for manufacturing and practicality.• Include real world functionality including screws, bolts, etc.Alex• Create a slightly more complicated but more appealing gear system (hide the gears)• Would no longer assume that the school computers will always work• Re-design the arms to have a better gripping surface.• Wouldn’t spend as much time on motion studyGroup• Unsuccessful in simulating the pick-up and drop of the Cube, Triangular Prism and

Cylinder after 16 hours of attempts.

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Summary of Results

• Design was successfully modelled and assembled.• Body functions with the motor, and motor successfully

transfers rotary motion to the TRI’n Grab in order to close and open.

• Fitting Simulation performed and captured.• Motion Analysis: Successfully animated the TRI’n Grab

closing without causing interference with itself. Unfortunately, we were unsuccessful in simulation the pick-up and drop of the Cube, Triangular Prism and Cylinder after 16 hours of attempts.

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solidworks design project

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