Group 16 - Barbie™ Kawasaki® KFX® Power Wheels

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Barbie Kawasaki KFX

Contents

Introduction

For the Fall 2010 semester of MAE 277, Group 16 will be heading the reverse engineering process of a BarbieTM Kawasaki® KFX® Power Wheels children’s ATV. Our group consists of 5 members, and together, as a team, we will completely disassemble our product in a manner such that we can analyze each component and part from an engineering standpoint. At which time we will reassemble our product, returning it to its original state, having completed a full engineering analysis.

Executive Summary

The product analyzed in this report is the BarbieTM Kawasaki® KFX® Power Wheels children’s ATV manufactured by Fisher-Price and is sold to children ages 3 to 6. The product has a maximum weight capacity of 65 lbs and is powered by a 12V battery.
The main function of the product is to provide transportation and entertainment for the user. The function of transportation is done by forward/backwards translational motion and the direction of this motion is controlled by the user inputting human energy to the steering column. Forward/backward motion is carried out by the 12V battery providing electrical energy to the 19T pinion motors, which converts the electrical energy into rotational energy to spin the gearbox which spins the wheels. The direction of forward motion or backwards motion is controlled by the forward/reverse switch located at the front of the product. The direction of the vehicle is controlled by the user. The user inputs human energy to the steering handle that is converted to rotational energy. The energy is transmitted to the steering linkage which transmits the rotational energy to the wheels causing them to turn allowing the user to turn the vehicle left or right.
The analysis of the product consisted of first determining the main function, and breaking down the main function into sub functions. This was achieved when the product was disassembled and allowed the group to analyze the subsystems and their interactions discovered during disassembly. Being able to analyze the subsystems physically allowed the group to completely determine the sub functions of the product. The subsystems discovered were the steering system assembly, footboard assembly, gearbox motor assembly and the wire harness assembly. The product was then reassembled. By disassembling and reassembling the product, the group was able to determine how exactly the product worked by investigating the subsystems and their connections as briefly described in Gate 2.
During the disassembly and reassembly of the product, the group analyzed the global, societal, environmental and economic factors that went into designing the product and its components. The major factors that were considered during the designing process were concluded to be the societal and economic factors. For societal, the Barbie KFX Kawasaki is a child toy and with any household product, safety is a major concern so the product must be designed so that is it safe for the user. An example of safety design is the accelerator switch and the PC board used in the product. The accelerator switch only provides power to the motors when pressure is applied to the switch. As soon as pressure is released, the accelerator stops sending power to the motors and the PC board automatically stops the motors brining the product to a complete stop. For the economic factor, the product needs to remain profitable so the design of the product needs to be economically feasible in addition to effective design. Global and environmental factors were found to be minor factors for Barbie KFX Kawasaki because it was found during analysis that the product virtually has no effect on the environment. The materials used, steel and plastic are commonly made in modern industry and easily obtainable making global factors a minimal issue for the design process.

Group Members

  • Cory Bunnell
  • Alex Grenning
  • Jason Kress
  • Lawrence Ma
  • Matt Schwenzfeier

Request for Proposal - Gate 1

  • Background
  • Work Proposal
  • Capabilities Assessment
  • Management Proposal
  • Initial Product Assessment

Product Dissection - Gate 2

  • Gate 2 Purpose
  • Preliminary Project Review
  • Parts list
  • Product Dissection
  • Product Dissection Assessment

Product Analysis - Gate 3

  • Purpose
  • Cause for corrective action
  • Component summary
  • Product Analysis

Product Explanation - Gate 4

  • Purpose
  • Critical Project Review
  • Product Archaeology
  • Design Revisions

Delivery - Gate 5

  • Purpose
  • Finalization of Deliverables
  • Oral Presentation