Johnson Scorpion Fishing Reel

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Reel1.jpg


Contents

Product Description

This is the Scorpion Fishing Reel made by Johnson.

Replacement fishing reel for loosening/tightening fishing line. This is accomplished by human power as a crank (gear) which through a series of conversions spins and translates the reel to allow fishing line to be released or tightened.

Johnson has a wide variety of fishing reels, this being one of the lower price/quality ($7).



User Requirements

1. Durability and reliability - people who purchase this product do not want the product to be unable to perform its intended purpose or to altogether fail.

2. Aesthetics – purchasers are going to be more likely to buy the product if it is more attractive.

3. Ease of use – the reel needs to be simple and easy to use, shouldn’t require large amounts of time to assemble to the rod or to change lines.

4. The new reel must be able to fit on the most fishing pools

Engineering Specifications

1. Must have reel large enough to fit fishing lines (in)

2. Steps to attach to rod first time (# of steps)

3. Time to attach to rod first time (s)

4. Fatigue life (# cycles until failure)

5. Color availability (# of colors)

6. Steps to change line (# of steps)

7. Time to change line (s)

8. Ability to fit rods (% of modern rod sizes fit)

Parts

The table belows lists the Bill of Materials for the Scorpion Fishing Reel:

Table 1: Scorpion Fishing Reel Bill of Materials
Part # Part Name Category Function Material Picture
1 Pick up or Bail Support Element Locking Mechanism for Line (if over line, line is locked into place, if behind, in position for casting) Metal
Bale.jpg
2 Spindle Output Holds wound line, or when turning reel handle, will spin to retract line. Plastic
Spindle.jpg
3 Drag Adjustment Knobs Support Element Adjusts tightness of the line. Allows line to “play out” when line is pulled. Plastic (Exterior)

Metal (Interior)

Drag.jpg
4 Bail Spring Support Elements Applies force against the Bail when engaged. Metal/Plastic
Balespring.jpg
5 Bail Lever Motion Conversion Element Unlocks spindle from gearbox. Metal
Balelever.jpg
6 Plastic Casings Structural To add a shine to the appearance of the reel. Plastic
Casing.jpg
7 Spindle Housing Structural/ Motion Conversion Element Protects drive shaft and spins the bail. Plastic
Housing.jpg
8 Power wheel/gear Transmission Transfers power from handle to drive shaft and scotch yoke. Metal
Powerwheel.jpg
9 Handle Input Applies external force to power wheel. Plastic
Handle.jpg
10 Yoke Shaft Support Element Moves spindle up and down. Metal
Yokeshaft.jpg
11 Clutch Transmission Stops spindle from rotating in on direction when engaged. Metal
Clutch.jpg
12 Drive Shaft Motion Conversion/Support Element Transfers energy from power wheel to spin spindle. Metal
Driveshaft.jpg
13 Scotch Yoke Transmission Converts angular energy from power wheel to move the spindle linearly. Metal
Mechanism.jpg
14 Screws Structural Holds Parts Together Metal
Screws.jpg
15 Mechanism Casing Structural Outer shell, protects mechanisms, attaches reel to rod. Plastic
Mechcasing.jpg

CAD Drawings

Figure 1: Power Wheel
Power wheel cad.jpg

1 What Decisions were made in the design of this component/module? stuff
2 What are the critical features and dimensions? stuff
3 What kind of loading do we expect to be on the component? stuff
4 What measures can we use to evaluate performance? stuff


Figure 2: Yoke Shaft
Yoke shaft.jpg

1 What Decisions were made in the design of this component/module? When creating the shaft, dimensions on the length of the shaft, diameter of the shaft, length of the groove, depth of the groove, and the size of the scotch yoke connector had to be determined. Another decision was on the type of material. The company needed a material that will withstand forces applied by the user and also corrosion resistance to the saltwater in case of the shell being penetrated.
2 What are the critical features and dimensions? The critical dimension is the groove for which the scotch yoke moves. The critical feature is that this whole operation of the reel is very smooth and requires little force to begin movement.
3 What kind of loading do we expect to be on the component? The shaft has axial torques coming from movement of the fishing line, and shear on the screw from the same source.
4 What measures can we use to evaluate performance? For destructive testing, a hardness test could be done along with a tensile test until fracture. For nondestructive, test for surface roughness using Ultrasonic.


Figure 3: Yoke Wheel Front
Front image.JPG

Figure 4: Yoke Wheel Back
Yokewheel.JPG

1 What Decisions were made in the design of this component/module? stuff
2 What are the critical features and dimensions? stuff
3 What kind of loading do we expect to be on the component? stuff
4 What measures can we use to evaluate performance? stuff