BUGABOO BUFFALO

20111848 박기성

LIST

Customer Needs Blackbox Model Glassbox Model Bill Of Materials Exploded View Subtract-and-Operate Function Analysis Constraint Propagation Engineering Specifications Design Model Design Analysis Reference Sites

CUSTOMER NEEDS

Customer Need

Ⅰ. Noise - 소음이 적은가

Ⅱ. Cost - 가격이 합리적인가

Ⅲ. Aesthetics- 심미적으로 만족스러운가

- 유모차 본연의 외형 구조에 충실하였는가

Ⅳ. Stability

- 제동 기능은 완벽히 이루어지는가

- 하중 지탱 구조는 완벽한가

- 거친 길 주행에 안정성이 확보되어 있는가

- 주행 중 고장에 대비한 대안책이 마련되어 있는가

CUSTOMER NEEDS

Ⅴ. Manipulation

- 운전자가 손쉽게 운행이 가능한가

- 조향 기능은 편리하게 이루어지는가

- Folding 기능은 편리하게 이루어지는가

- Cover 는 제 기능을 완벽히 수행하는가

- Switch 는 올바른 위치에 구비되어 있는가

- Brake 는 올바른 위치에 구비되어 있는가

Ⅵ. Size- 운전자의 체형에 맞는 Size 로 설계되었는가

- 차체는 운전자가 부담을 느끼지 않을 무게인가

Ⅶ. Certification - 제품 안정성 인증은 완료되었는가

BLACK BOX MODEL

Input : Push up force of user, Lever of folding, Switch of steering, Brake Fundamental Output : Wheel rotation, Preventation of slipping, Folding of frame Incidental Output: Noise, Vibration & Heat

Noise

BugabooBuffalo

Push up force of user

Lever of folding

Switch of steering

Brake

Wheel rotation

Vibration & Heat

Prevention of slipping

Folding of frame

Drive

GLASS BOX MODEL

Push up force of user

Lever of folding

Switch of steering

Brake

Wheel rotation

Prevention of slipping

Folding of frame

Transmission

Vibration & HeatNoise

Drive

BILL OF MATERIALS

Bill Of Materials

부품 갯수

10 인치 발포 고무 타이어 2

12 인치 발포 고무 타이어 2

매트리스 1

시트 프레임 2

배시넷 패브릭 1

배시넷 우드보드 1

섀시 1

회전 앞바퀴 조립세트 2

BILL OF MATERIALS

핸들바 교체세트 1

시트 패브릭 1

시트 우드보드 1

썬 캐노피 와이어세트 3

회전 바퀴 잠금장치 교체세트 8

언더시트 바스켓 1

레인 커버 1

센트럴 조인트 캡 2

에어 펌프 2

핸들바 조절 클립 교체세트 2

BILL OF MATERIALS

안전벨트 교체세트 3

회전식 캐리 핸들 1

썬 캐노피 클램프 2

공용 악세서리 어댑터 4

악세서리 커넥터 4

휠보드 고무줄 4

휠보드 회전바퀴 4

사타구니 부분 안전벨트 1

EXPLODED VIEW

1. rain cover2. underseat basket3. base seat fabric4. seat/bassinet frame5. carry handle6. wire frame7. chassis with wheels8. extendable sun canopy and

bassinet apron (shown above in royal blue)

9. base bassinet fabric

SUBTRACT-AND-OPERATE

Subtract-and-Operate

Assembly/

Part No.Part Description Effect of Removal

001 10'' foam filled tire can't drive

002 12'' foam filled tire can't drive

003 mattress no effect

004 seat frame can't sustain

005 bassinet fabric can't load

006 bassinet wooden board can't sustain

007 chassis can't sustain

008 front swivel wheel assembly can't assemble

009 handlebar replacement set can't replace

010 seat fabric can't pick up

011 seat wooden board can't sustain

012 sun canopy wires set can't hold

013 swivel wheel locks replacement set can't replace

014 underseat basket no effect

015 rain cover can't take shelter

016 central joint caps it's not good at aesthetic

017 air pump can't absorb a shock

SUBTRACT-AND-OPERATE

SUBTRACT-AND-OPERATE

018 handlebar adjustment clips replacement set can't replace

019 harness straps replacement set can't replace

020 rotating carry handle can't rotate

021 sun canopy clamps can't clamp a sun canopy

022 universal accessory connector(2) no effect

023 universal accessory connector(3) no effect

024 universal accessory connector(4) no effect

025 wheeled board elastic cord no effect

026 wheeled board swivel star wheel can't rotate

027 crotch strap be exposed to danger

Force

Switch BrakeLever

Transmission

NotSlipping

WheelRotation

Folding

FUNCTION ANALYSIS

CONSTRAINT PROPAGATION

TBD

ENGINEERING SPECIFICATIONS

Customer Need Sub-function Metric Benchmark

Stability

Load Bearing Weight Capacity 17kg / 37.5lbs

Stability of drivingWheels

10“ Swivel & 12”

Suspended

Seat Belt 5p Seatbelt

Braking Recline 3 Positions

Manipulation Folding function Fold 1 & 2 piece

Size

Size

Unfolded 60 cm / 24”

Folded88x54x34 cm /

35x21x13”

Weight

Underseat Basket

Weight35 l / 9.2 gal

Weight 12.3kg / 27.1lbs

Hook Weight 6kg

ENGINEERING SPECIFICATIONS

DESIGN MODEL

The invention relates to a swivel wheel (10) with suspension (14), comprising a wheel frame (11), a wheel element (12) able to turn about a horizontal wheel axle (13), a suspension (14) and an arm (15). At one end the arm (15) is attached to the wheel frame (11) such that it can pivot about a horizontal arm axis (17) and at the other end it supports the wheel axle (13) some distance away from the arm axis (17). The suspension (14) engages on the arm (15) at an arm engagement point (18) and on the wheel frame (11) at a frame engagement point (19). The arm engagement point (18) and the frame engagement point (19) define a straight suspension axis (20) running through these points. The wheel furthermore has an adjustment mechanism (30) that is equipped for setting the distance (D) from the suspension axis (20) to the arm axis (17) by moving the arm engagement point (18) and / or the frame engagement point (19) along an adjustment track (31).

DESIGN ANALYSIS

The experimental results were used to calibrate the metric equations and to solve an optimization formulation.

The Bugaboo Buffalo is engineered to be robust - tested up to a total seat load of 23 kg / 50 lbs, with a maximum weight of the child of 17kg / 37.5 lbs.

REFERENCE SITES

http://abpat.kipris.or.kr/abpat/searchLogina.do?next=MainSearch

http://www.pishposhbaby.com/bugaboo-buffalo.html

https://www.bugaboo.com/