Skid Steer Loader Preliminary Design Presentation

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Skid Steer Loader Preliminary Design Presentation

• Team WolfCat

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Outline

• Personnel
• CAT Background Information
• Problem Statement
• Critical Designs
• Summary

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Personnel

• T. Smith Jordan Group Coordinator, Shop
  Fabricator
• Douglas Daniel Head Welder
  
• Antwan Jones Shop Fabricator Welder
• Emmett Willis Machinist
• Jeff Pardee Treasurer

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CAT Information

• Caterpillar Inc. is the world's largest
  manufacturer of construction and mining
  equipment, diesel and natural gas engines and
  industrial gas turbines.
• Caterpillar uses cutting-edge technology to
  reduce product development time, improve
  productivity, lower operating costs and ensure
  that CAT products continue to meet changing
  customer needs.

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Problem statement

• The skid steer loader is a compact construction
  machine used in many applications including
  landscaping and general building. The door
  functions to protect the operator from weather as
  well as from flying objects.
• The door must be redesigned to
• Enhance visibility and sealing.
• Avoid damage to door from lifting loader arms.
• Improve the aesthetics of the door and give it
  the impression that it is an integral part of the
  machine.

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Problems With Current Design

• Low visibility due to bulky wiper mechanism and
  door handle
• Poor sealing between door and cab
• Potential damage to door by the lift arms

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Visibility Improvements

• Moved washer fluid reservoir inside the cab
• Simplified and moved latch mechanism
• Extended the bottom of the door two inches down
• Improves visibility on both sides of the door

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New Hinge Design

• Opening cab door extends a pin over loader arm to
  prevent arms from being raised
• Simple mechanical solution
• Increased rigidity improves sealing

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Stress Analysis

• Stresses across hinge in response to a 250lb
  force
• Resulting factor of safety of 10

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New Door Handle

• Eliminates unsightly linkages inside cab
• Improves visibility at the bottom corner
• Eliminates need for extra handle to close the
  door from inside

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Critical Design Summary

• Improves visibility in particular areas by
  repositioning the wiper mechanism and door handle
• Enables operator to remove and install the door
  quickly
• Reduction in frame size decreases overall weight
  of the door while making it more aesthetically
  pleasing
• Strengthened hinges will give the door a more
  solid feel