Bike pump

From DDL Wiki

(Difference between revisions)
Jump to: navigation, search
(→Failure Modes & Effects Analysis (FMEA))
(→Bill of Materials)
Line 94: Line 94:
! scope="col" class="unsortable" | Image
! scope="col" class="unsortable" | Image
|-
|-
-
| 1 || Screw || 5 || 4 || Holds base support (#8) in place to metal base (#32) || Steel || *** || [[Image:x01.jpg | 100x100px]]
+
| 1 || Screw || 5 || 4 || Holds base support (#8) in place to metal base (#32) ||Steel|| *** || [[Image:x01.jpg | 100x100px]]
|-
|-
-
| 2 || Nut || 5 || 1 || Attaches screws (#1) to metal base (#32) || Steel || *** || [[Image:x02.jpg | 100x100px]]  
+
| 2 || Nut || 5 || 1 || Attaches screws (#1) to metal base (#32) ||Steel|| *** || [[Image:x02.jpg | 100x100px]]  
|-
|-
-
| 3 || Rubber readout cover || 1 || 30 || Holds plastic readout cover (#4) in place above pressure gauge mechanics (#23) || Rubber || *** || [[Image:x03.jpg | 100x100px]]
+
| 3 || Rubber readout cover || 1 || 30 || Holds plastic readout cover (#4) in place above pressure gauge mechanics (#23) ||Rubber|| *** || [[Image:x03.jpg | 100x100px]]
|-
|-
-
| 4 || Plastic readout cover || 1 || 12 || Provides clear screen and protection to number dial readout (#10) || Plastic || *** || [[Image:x04.jpg | 100x100px]]
+
| 4 || Plastic readout cover || 1 || 12 || Provides clear screen and protection to number dial readout (#10) ||Plastic|| *** || [[Image:x04.jpg | 100x100px]]
|-
|-
-
| 5 || Metal connection valve tip || 1 || 5 || Holds rubber connection valve tip (#6) in place || Aluminum || *** || [[Image:x05.jpg | 100x100px]]
+
| 5 || Metal connection valve tip || 1 || 5 || Holds rubber connection valve tip (#6) in place ||Aluminum|| *** || [[Image:x05.jpg | 100x100px]]
|-
|-
-
| 6 || Rubber connection valve tip || 1 || 2 || Creates seal onto bike tube valve || Rubber || *** || [[Image:x06.jpg | 100x100px]]
+
| 6 || Rubber connection valve tip || 1 || 2 || Creates seal onto bike tube valve ||Rubber|| *** || [[Image:x06.jpg | 100x100px]]
|-
|-
-
| 7 || Air hose holder (double) || 1 || 12 || Holds air hose (#33) to main tube (#31) during storage || Plastic || *** || [[Image:x07.jpg | 100x100px]]
+
| 7 || Air hose holder (double) || 1 || 12 || Holds air hose (#33) to main tube (#31) during storage ||Plastic|| *** || [[Image:x07.jpg | 100x100px]]
|-
|-
-
| 8 || Plastic base support || 1 || 10 || Reduces cantilever stresses on outer arm tube || Plastic || *** || [[Image:x08.jpg | 100x100px]]
+
| 8 || Plastic base support || 1 || 10 || Reduces cantilever stresses on outer arm tube ||Plastic|| *** || [[Image:x08.jpg | 100x100px]]
|-
|-
-
| 9 || #7 O-Ring || 2 || < 1 || Provides necessary friction to hold the double air hose holder(#7) onto outer arm tube (#31) and allow for vertical movement along axis of tube || Rubber || *** || [[Image:x09.jpg | 100x100px]]
+
| 9 || #7 O-Ring || 2 || < 1 || Provides necessary friction to hold the double air hose holder(#7) onto outer arm tube (#31) and allow for vertical movement along axis of tube ||Rubber|| *** || [[Image:x09.jpg | 100x100px]]
|-
|-
-
| 10 || Readout number dial || 1 || 3 || Provides a quantified tire pressure readout || Aluminum || *** || [[Image:x10.jpg | 100x100px]]
+
| 10 || Readout number dial || 1 || 3 || Provides a quantified tire pressure readout ||Aluminum|| *** || [[Image:x10.jpg | 100x100px]]
|-
|-
-
| 11 || Readout needle || 1 || < 1 || Displays the quantified tire pressure on (#10) || Aluminum || *** || [[Image:x11.jpg | 100x100px]]
+
| 11 || Readout needle || 1 || < 1 || Displays the quantified tire pressure on (#10) ||Aluminum|| *** || [[Image:x11.jpg | 100x100px]]
|-
|-
-
| 12 || #13 Rubber seal || 2 || < 1 || Provides seal on bike tube inside the pump stabalizer (#13) || Plastic || *** || [[Image:x12.jpg | 100x100px]]
+
| 12 || #13 Rubber seal || 2 || < 1 || Provides seal on bike tube inside the pump stabalizer (#13) ||Plastic|| *** || [[Image:x12.jpg | 100x100px]]
|-
|-
-
| 13 || Pump stabalizer || 1 || 13 || Allows metal rod (#19) to move within the main tube (#31) || Plastic ||*** || [[Image:x13.jpg | 100x100px]]
+
| 13 || Pump stabalizer || 1 || 13 || Allows metal rod (#19) to move within the main tube (#31) ||Plastic||*** || [[Image:x13.jpg | 100x100px]]
|-
|-
-
| 14 || Piston head || 1 || 8 || Acts as a pump to draw in air within the main tube (#31) and then compress the air || Plastic || *** || [[Image:x14.jpg | 100x100px]]
+
| 14 || Piston head || 1 || 8 || Acts as a pump to draw in air within the main tube (#31) and then compress the air ||Plastic|| *** || [[Image:x14.jpg | 100x100px]]
|-
|-
-
| 15 || Tube connector || 2 || 4 || Connects hose (#33) to nozzle (#***) and to the metal base (#32) || Plastic || *** || [[Image:x15.jpg | 100x100px]]
+
| 15 || Tube connector || 2 || 4 || Connects hose (#33) to nozzle (#***) and to the metal base (#32) ||Plastic|| *** || [[Image:x15.jpg | 100x100px]]
|-
|-
-
| 16 || Air hose holder (single) || 1 || 2 || Holds air hose (#33) to main tube (#31) during storage || Plastic || *** || [[Image:x16.jpg | 100x100px]]
+
| 16 || Air hose holder (single) || 1 || 2 || Holds air hose (#33) to main tube (#31) during storage ||Plastic|| *** || [[Image:x16.jpg | 100x100px]]
|-
|-
-
| 17 || Handle bar || 1 || 127 || Allows user to apply downward force to draw and compress air in the main tube (#31) || Plastic || *** || [[Image:x17.jpg | 100x100px]]
+
| 17 || Handle bar || 1 || 127 || Allows user to apply downward force to draw and compress air in the main tube (#31) ||Plastic|| *** || [[Image:x17.jpg | 100x100px]]
|-
|-
-
| 18 || End cap || 2 || 6 || Provides a covering to the ends of the handle bar || Plastic || *** || [[Image:x18.jpg | 100x100px]]
+
| 18 || End cap || 2 || 6 || Provides a covering to the ends of the handle bar ||Plastic|| *** || [[Image:x18.jpg | 100x100px]]
|-
|-
-
| 19 || Metal rod || 1 || 174 || Connects piston head (#14) to the handle bar (#17) || Steel || *** || [[Image:x19.jpg | 100x100px]]
+
| 19 || Metal rod || 1 || 174 || Connects piston head (#14) to the handle bar (#17) ||Steel|| *** || [[Image:x19.jpg | 100x100px]]
|-
|-
-
| 20 || Stopper || 1 || < 1 || *** || Plastic || *** || [[Image:x20.jpg | 100x100px]]
+
| 20 || Stopper || 1 || < 1 || *** ||Plastic|| *** || [[Image:x20.jpg | 100x100px]]
|-
|-
-
| 21 || Spring || 1 || < 1 || *** || Steel || *** || [[Image:x21.jpg | 100x100px]]
+
| 21 || Spring || 1 || < 1 || *** ||Steel|| *** || [[Image:x21.jpg | 100x100px]]
|-
|-
-
| 22 || *** || 1 || < 1 || *** || Rubber || *** || [[Image:x22.jpg | 100x100px]]
+
| 22 || *** || 1 || < 1 || *** ||Rubber|| *** || [[Image:x22.jpg | 100x100px]]
|-
|-
-
| 23 || Pressure gauge mechanics || 1 || 50 || *** || Copper || *** || [[Image:x23.jpg | 100x100px]]
+
| 23 || Pressure gauge mechanics || 1 || 50 || *** ||Copper|| *** || [[Image:x23.jpg | 100x100px]]
|-
|-
-
| 24 || Small screw || 2 || < 1 || *** || Steel ||*** || [[Image:x24.jpg | 100x100px]]
+
| 24 || Small screw || 2 || < 1 || *** ||Steel||*** || [[Image:x24.jpg | 100x100px]]
|-
|-
-
| 25 || Air flow director || 1 || 49 || *** || Plastic ||*** || [[Image:x25.jpg | 100x100px]]
+
| 25 || Air flow director || 1 || 49 || *** ||Plastic||*** || [[Image:x25.jpg | 100x100px]]
|-
|-
-
| 26 || Tube connection to #32 || 1 || 3 || *** || Plastic ||*** || [[Image:x26.jpg | 100x100px]]
+
| 26 || Tube connection to #32 || 1 || 3 || *** ||Plastic||*** || [[Image:x26.jpg | 100x100px]]
|-
|-
-
| 27 || #28 O-ring || 1 || < 1 || Provides a seal to *** (#28) || Rubber ||*** || [[Image:x27.jpg | 100x100px]]
+
| 27 || #28 O-ring || 1 || < 1 || Provides a seal to *** (#28) ||Rubber||*** || [[Image:x27.jpg | 100x100px]]
|-
|-
-
| 28 || *** || 1 || < 1 || *** || Plastic || *** || [[Image:x28.jpg | 100x100px]]
+
| 28 || *** || 1 || < 1 || *** ||Plastic|| *** || [[Image:x28.jpg | 100x100px]]
|-
|-
-
| 29 || *** Seal between #25 & #30 || 1 || < 1 || Provides a seal between the air flow director (#25) and *** (#30) || Rubber || *** || [[Image:x29.jpg | 100x100px]]
+
| 29 || *** Seal between #25 & #30 || 1 || < 1 || Provides a seal between the air flow director (#25) and *** (#30) ||Rubber || *** || [[Image:x29.jpg | 100x100px]]
|-
|-
-
| 30 || *** || 1 || 7 || Provides a connection between hose (#33) and air flow director (#25) || Plastic || *** || [[Image:x30.jpg | 100x100px]]
+
| 30 || *** || 1 || 7 || Provides a connection between hose (#33) and air flow director (#25) ||Plastic|| *** || [[Image:x30.jpg | 100x100px]]
|-
|-
-
| 31 || Main tube || 1 || 238 || *** || Steel ||*** || [[Image:x31.jpg | 100x100px]]
+
| 31 || Main tube || 1 || 238 || *** ||Steel||*** || [[Image:x31.jpg | 100x100px]]
|-
|-
-
| 32 || Metal base || 1 || 540 || *** || Steel || *** || [[Image:x32.jpg | 100x100px]]
+
| 32 || Metal base || 1 || 540 || *** ||Steel || *** || [[Image:x32.jpg | 100x100px]]
|-
|-
-
| 33 || Hose || 1 || 83 || *** || Rubber || *** || [[Image:x33.jpg | 100x100px]]
+
| 33 || Hose || 1 || 83 || *** ||Rubber|| *** || [[Image:x33.jpg | 100x100px]]
-
|-
+
-
| 34
+
-
|-
+
-
| 35
+
-
|-
+
-
| 36
+
-
|-
+
-
| 37
+
-
|-
+
-
| 38
+
-
|-
+
-
| 39
+
-
|-
+
-
| 40
+
|}
|}

Revision as of 19:51, 17 September 2012

Figure 1: Competitor product used for dissection study
Figure 1: Competitor product used for dissection study


Contents

Executive Summary

This will be a brief executive summary that describes the key findings and recommendations.

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elementum elit vel tortor scelerisque auctor. Donec urna dui, eleifend eget adipiscing vulputate, feugiat id nisl. Donec mattis, quam in tincidunt ullamcorper, orci tellus condimentum dui, aliquet faucibus risus nunc et nunc. Vestibulum metus justo, volutpat sed consequat eget, mollis sed neque. Maecenas dignissim hendrerit malesuada. Aliquam dictum gravida orci ut rutrum. Fusce eros lectus, accumsan sed rhoncus eu, tempor sed magna. In ac lacus urna, ut cursus nisl. Curabitur ac dui nisl, in imperdiet orci. Aliquam quam dui, tincidunt quis volutpat quis, convallis a ipsum. Suspendisse quis molestie lorem. Nunc vel magna commodo nunc viverra tempor id blandit neque. Donec nec elementum ligula. Cras accumsan, urna eget dictum varius, arcu nunc porttitor tortor, sit amet feugiat nisl elit vitae elit. Proin eget tellus lectus, tempus tincidunt augue. Sed sagittis iaculis orci, sit amet tempus dui tincidunt in.


Product Stakeholders

We have identified possible needs and wants for all possible stakeholders. The identified needs are those needs that are essential in order to encourage the stakeholder to use it. The identified wants are additional features that may benefit the stakeholder, however, they are not vital to the use of the product.

For the purpose of this study, the consumer is the person pumping up the bike tire, not necessarily the bike owner.


Stakeholder Needs and Wants
Stakeholder Needs Wants
Consumer
  • Product should not require much force or time during pumping process
  • Mechanical advantage and efficiency during the pumping process
  • Intuitive
  • Balances strong performance and minimal cost
  • Lightweight and space efficient
  • Ergonomic
  • Durability
Retailer
  • Cheap & durable materials
  • Efficient storage
  • Aesthetically appealing
  • Standardization
Manufacturer
  • Cheap & easily processed materials
  • Mass production
  • Easy assembly
  • Volume-efficient materials
Shipping & Transportation
  • Lightweight
  • Durability
  • Space-efficient packaging

Product Use Study

This is where we will document in detail how the product is used, step by step, and summarize findings from our user studies with photo documentation.


Product Mechanical Function

We will include some pretty diagrams and information about the mechanical function of our part.


Assembly

This is where we will have information/photo about the major assembly.

An exploded view of the floor bike pump will be inseted here... with all components labeled.


Sub-Assembly

We may need to include detailed sub-assembly photos and information here.

This is where we will insert exploded views of each internal sub-assembly with labeled components and a brief summary of each sub-assembly function.


Bill of Materials

The following is a bill of materials from the bike pump dissection. The parts can be sorted based on part number, quantity, weight or material by clicking on the appropriate tab at the top of the table.


Part Number Name QTY Weight (g) Function Material Manufacturing Process Image
1 Screw 5 4 Holds base support (#8) in place to metal base (#32) Steel ***
2 Nut 5 1 Attaches screws (#1) to metal base (#32) Steel ***
3 Rubber readout cover 1 30 Holds plastic readout cover (#4) in place above pressure gauge mechanics (#23) Rubber ***
4 Plastic readout cover 1 12 Provides clear screen and protection to number dial readout (#10) Plastic ***
5 Metal connection valve tip 1 5 Holds rubber connection valve tip (#6) in place Aluminum ***
6 Rubber connection valve tip 1 2 Creates seal onto bike tube valve Rubber ***
7 Air hose holder (double) 1 12 Holds air hose (#33) to main tube (#31) during storage Plastic ***
8 Plastic base support 1 10 Reduces cantilever stresses on outer arm tube Plastic ***
9 #7 O-Ring 2 < 1 Provides necessary friction to hold the double air hose holder(#7) onto outer arm tube (#31) and allow for vertical movement along axis of tube Rubber ***
10 Readout number dial 1 3 Provides a quantified tire pressure readout Aluminum ***
11 Readout needle 1 < 1 Displays the quantified tire pressure on (#10) Aluminum ***
12 #13 Rubber seal 2 < 1 Provides seal on bike tube inside the pump stabalizer (#13) Plastic ***
13 Pump stabalizer 1 13 Allows metal rod (#19) to move within the main tube (#31) Plastic***
14 Piston head 1 8 Acts as a pump to draw in air within the main tube (#31) and then compress the air Plastic ***
15 Tube connector 2 4 Connects hose (#33) to nozzle (#***) and to the metal base (#32) Plastic ***
16 Air hose holder (single) 1 2 Holds air hose (#33) to main tube (#31) during storage Plastic ***
17 Handle bar 1 127 Allows user to apply downward force to draw and compress air in the main tube (#31) Plastic ***
18 End cap 2 6 Provides a covering to the ends of the handle bar Plastic ***
19 Metal rod 1 174 Connects piston head (#14) to the handle bar (#17) Steel ***
20 Stopper 1 < 1 *** Plastic ***
21 Spring 1 < 1 *** Steel ***
22 *** 1 < 1 *** Rubber ***
23 Pressure gauge mechanics 1 50 *** Copper ***
24 Small screw 2 < 1 *** Steel***
25 Air flow director 1 49 *** Plastic***
26 Tube connection to #32 1 3 *** Plastic***
27 #28 O-ring 1 < 1 Provides a seal to *** (#28) Rubber***
28 *** 1 < 1 *** Plastic ***
29 *** Seal between #25 & #30 1 < 1 Provides a seal between the air flow director (#25) and *** (#30) Rubber ***
30 *** 1 7 Provides a connection between hose (#33) and air flow director (#25) Plastic ***
31 Main tube 1 238 *** Steel***
32 Metal base 1 540 *** Steel ***
33 Hose 1 83 *** Rubber ***

Design for Manufacture and Assembly (DFMA)

      • Introduction as to what DFMA is***


Manufacturing

The competitor product we analyzed displayed numerous positive manufacturing features that would minimize cost and complexity. The overall design is surprisingly simple, a result of combining features into single parts where possible, using only a few different materials, and minimizing the overall part count. (INSERT COMPONENT WITH BIGGEST ROOM FOR IMPROVEMENT AND WHY).

Below are some of the DFM Guidelines and the observations we made of how our competitor designed their product with those guidelines in mind and some areas we believe they could improve.


Design for Manufacturing Features and Improvements
Design Objective Strengths Areas of Improvement
Minimize Part Count
  • Few fasteners, mostly everything screws and locks together
  • Many multifunctional components leading to less parts overall
Standardize Design Features
  • All screws in the system are identical
  • Since there are few fasteners, most parts are custom-made for this product
Keep Designs Simple
  • Piston shows a clever design to allow air into the pump on upstroke while eliminating lost air on downstroke, while still remaining very simple
  • Pressure gauge is very complex, needs fine adjustment and much protection
Multifunctional Parts
  • Many parts serve a specific purpose while also screwing into the next assembling acting as both a functional piece and connector
Ease of fabrication
  • Mostly composed of some type of plastic and steel
  • The plastic parts are for the most part unique and would each need their own mold
Avoid Tight Tolerances
  • Uses flexible rubber o-rings to allow for larger tolerances while remaining airtight
Minimize Secondary & Finishing Operations
  • Since parts are multifunctional, most would require at least would need a secondary threading operation


Assembly

Assembly of the competitor's product is not the consumer's responsibility and occurs prior to the retail stages in the supply chain. The product requires tools and fasteners only where the piston chamber attaches to the base, and nearly all of the remaining interfaces are threaded. While minimizing toolage, this raises many challenges with orientation and radial symmetry where the assembly process could be made clearer. The variety of O-rings, springs, and cylinder diameters is another weakness that has room for improvement.

Due to the assembly process being deliberately separated from the consumer, ease of assembly is not a high priority and leaves room for redesign towards simplicity.


Design for Assembly Features and Improvements
Design Objective Strengths Areas of Improvement
Minimize Part Count
  • There’s the metal piece in the handle we can’t account for
  • Air flow pathway has several components
Minimize Assembly Surfaces
  • Baseplate has multiple interfaces, axes
  • Piston has multiple planes and axes
Use Sub-assemblies
  • Pressure Gauge is a discrete system
  • Air compression mechanics are limited to main tube
  • Nozzle is a discrete system
  • Functional testing requires end-to-end assembly
Mistake-Proof
  • Asymmetric Handlebar
  • Many radially symmetric parts
Minimize Fasteners
  • Most of the assembly is screwed together
  • Tools and fasteners required for fixing main tube to base
Minimize Handling
  • Hose attachments have conical guides
  • Interfaces have many different axes and planes
Minimize Assembly Direction
  • Two distinct possible assembly directions (Nozzle or Handle)
Provide Unobstructed Access
  • Base plate obscures airflow components
  • Nozzle has multiple hidden components
  • Pressure gauge mechanics are hard to access
Maximize Assembly Compliance

Failure Modes & Effects Analysis (FMEA)

  • NEED TO INCLUDE INTO AS TO WHAT FMEA IS
  • INCLUDE THE SCALE USED TO DETERMINE S/O/D VALUES
  • THEN, ADD TO REFERENCE SECTION THE SOURCE FOR THE SCALE


Failure Modes and Effects Analysis - Floor Bike Pump
Item & Function Failure Mode Effects of Failure S Causes of Failure O Design Controls D RPN Recommended Actions
Valve Nozzle ConnectorAir leaking out of wheelBike tube loses air3Misalignment to valve2Check if it locks212Something to help user better secure nozzle properly
Does not lockNo air transfer into wheel3User not using it correctly2Check if it locks318
  • Something that does not use a lock
  • Make it easier
Valve may not fitNo air transfer into wheel1Wrong valve type4Check if it locks416
  • Make a universal valve
  • Provide adapters
Pressure GaugeAir leaking out of wheelWon't display pressure2Broken gauge1Test in manufacturing plant24
  • Better pressure gauge tube seal
  • Different pressure reading technique
Incorrectly calibratedDisplays incorrect pressure reading2
  • Dropping gauge
  • Manufacturing error
1Test in manufacturing plant714--
Handle rodBends
  • Can not apply downward force
  • Breaks rod
5
  • Bars are physically bent forward and not down
  • Damaged
  • Improper use
2--770Stronger rod
TubeAir leaking out of wheelLoss of air from tire3
  • Misuse
  • Damage
3--436Tube wrapped in durable material

Design for Environment (DFE)

Amber shall populate this space with some cool graphs and knowledge.

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elementum elit vel tortor scelerisque auctor. Donec urna dui, eleifend eget adipiscing vulputate, feugiat id nisl. Donec mattis, quam in tincidunt ullamcorper, orci tellus condimentum dui, aliquet faucibus risus nunc et nunc. Vestibulum metus justo, volutpat sed consequat eget, mollis sed neque. Maecenas dignissim hendrerit malesuada. Aliquam dictum gravida orci ut rutrum. Fusce eros lectus, accumsan sed rhoncus eu, tempor sed magna. In ac lacus urna, ut cursus nisl. Curabitur ac dui nisl, in imperdiet orci. Aliquam quam dui, tincidunt quis volutpat quis, convallis a ipsum. Suspendisse quis molestie lorem. Nunc vel magna commodo nunc viverra tempor id blandit neque. Donec nec elementum ligula. Cras accumsan, urna eget dictum varius, arcu nunc porttitor tortor, sit amet feugiat nisl elit vitae elit. Proin eget tellus lectus, tempus tincidunt augue. Sed sagittis iaculis orci, sit amet tempus dui tincidunt in.

Group Dynamic

Group 2: JR, Patrick, Dinesh, Lauren, Amber
Group 2: JR, Patrick, Dinesh, Lauren, Amber

Team Leader: Dinesh Ayyappan

DFMA Lead: Patrick Hogan

FMEA Lead: Jonathan Wong

DFE Lead: Amber Ohiokpehai

Wiki Page Programmer/Report Compilation: Lauren Milisits

References

This is where we should list any references that we used throughout the process of our report.

Retrieved from "https://wiki.ece.cmu.edu/ddl/index.php/Bike_pump"
Personal tools