|
|
Line 126: |
Line 126: |
| |- | | |- |
| | | |
| + | | style="text-align: center;" | 13 |
| + | | U-bolt |
| + | | style="text-align: center;" | 2 |
| + | | style="text-align: center;" | NA oz |
| + | | Bolts down the ''crank'' to the ''base plate'' |
| + | | T 6061 Aluminum |
| + | | Upset forging |
| + | | [[Image:Complex_post_hole_digger_small_washer.jpg|100px]] |
| + | |- |
| | | |
| + | | style="text-align: center;" | 14 |
| + | | Base plate |
| + | | style="text-align: center;" | 1 |
| + | | style="text-align: center;" | NA oz |
| + | | Provides a location to rigidly attach ''lead screw'' to operating mechanism so a turn of the ''crank'' will produce linear motion of the ''central rod'', as well as bolting down the ''crank'' using the ''U-bolts'' |
| + | | T 6061 Aluminum |
| + | | Stamping |
| + | | [[Image:Complex_post_hole_digger_small_washer.jpg|100px]] |
| + | |- |
| | | |
- | | + | | style="text-align: center;" | 15 |
- | | + | |
- | | style="text-align: center;" | 13 | + | |
| | Shovel pivot bolt | | | Shovel pivot bolt |
| | style="text-align: center;" | 1 | | | style="text-align: center;" | 1 |
Line 140: |
Line 156: |
| |- | | |- |
| | | |
- | | style="text-align: center;" | 14 | + | | style="text-align: center;" | 16 |
| | Shovel link bolt | | | Shovel link bolt |
| | style="text-align: center;" | 2 | | | style="text-align: center;" | 2 |
Line 150: |
Line 166: |
| |- | | |- |
| | | |
- | | style="text-align: center;" | 15 | + | | style="text-align: center;" | 17 |
| | Central rod bolt | | | Central rod bolt |
| | style="text-align: center;" | 1 | | | style="text-align: center;" | 1 |
Line 160: |
Line 176: |
| |- | | |- |
| | | |
- | | style="text-align: center;" | 16 | + | | style="text-align: center;" | 18 |
| | Hairpin cotter pin | | | Hairpin cotter pin |
| | style="text-align: center;" | 1 | | | style="text-align: center;" | 1 |
Line 173: |
Line 189: |
| | | |
| | | |
- | | style="text-align: center;" | C10
| + | |
- | | M8 washer
| + | |
- | | style="text-align: center;" | 3
| + | |
- | | style="text-align: center;" | 0.05 oz
| + | |
- | | Increases surface area over which compressive force of the tightened bolt and nut is applied, placed between nut and surface and/or bolt head and surface to prevent damage to surface when nut is tightened
| + | |
- | | Steel
| + | |
- | | Stamping
| + | |
- | | [[Image:Complex_post_hole_digger_small_washer.jpg|100px]]
| + | |
- | |-
| + | |
| | | |
| | style="text-align: center;" | C11 | | | style="text-align: center;" | C11 |
Table *****: Individual Components of Redesigned Post Hole Digger
Part Number | Name | Qty. | Weight | Function | Material | Manufacturing Process | Image
|
1
| Shaft
| 1
| NA oz
| Constrains inner parts of tool and handles physical stresses of digging
| T 6061 Aluminum
| Extrusion
|
|
2
| Central rod
| 1
| NA oz
| Transmits rotational motion of lead screw into translational motion, forcing shovels closed
| T 6061 Aluminum
| Extrusion
|
|
3
| Crank
| 1
| NA oz
| Turned by user to close shovels
| T 6061 Aluminum
| Extrusion
|
|
4
| Shovel
| 2
| NA oz
| Contain dirt when digging
| Steel
| Stamping
|
|
5
| Shaft handle
| 2
| NA oz
| Provides gripping location for ground penetration strike and location for applying counteractive moment to shaft when turning crank to close shovels
| T 6061 Aluminum
| Extrusion
|
|
6
| Handle peg
| 4
| NA oz
| Allow user to force tool into the ground using his/her foot
| T 6061 Aluminum
| Extrusion
|
|
7
| Guide bushing
| 2
| NA oz
| Constrains central rod to maintain linear motion within shaft
| T 6061 Aluminum
| Extrusion
|
|
8
| Lead screw
| 1
| NA oz
| Transmits rotation of crank into translation of central rod
| Steel
| Automated CNC lathe/threading machine
|
|
9
| Lead screw nut
| 1
| NA oz
| Constrains lead screw
| Brass
| Automated CNC milling
|
|
10
| Lead screw nut bushing
| 1
| NA oz
| Constrains lead screw nut and locates it within shaft
| T 6061 Aluminum
| Lathe???
|
|
11
| Inline ball joint
| 1
| NA oz
| Translates rotation of lead screw to translation of central rod and connects the two parts
| Steel
| ???
|
|
12
| Shovel link
| 2
| NA oz
| Connects central rod to shovels
| T 6061 Aluminum
| Extrusion
|
|
13
| U-bolt
| 2
| NA oz
| Bolts down the crank to the base plate
| T 6061 Aluminum
| Upset forging
|
|
14
| Base plate
| 1
| NA oz
| Provides a location to rigidly attach lead screw to operating mechanism so a turn of the crank will produce linear motion of the central rod, as well as bolting down the crank using the U-bolts
| T 6061 Aluminum
| Stamping
|
|
15
| Shovel pivot bolt
| 1
| NA oz
| Joins center of the two shovels, allowing them to pivot about it as a central axis
| Steel
| Upset forging
|
|
16
| Shovel link bolt
| 2
| NA oz
| Joins each respective shovel to its shovel link
| Steel
| Upset forging
|
|
17
| Central rod bolt
| 1
| NA oz
| Joins central rod to the two shovel links as a loosely pinned connection
| Steel
| Upset forging
|
|
18
| Hairpin cotter pin
| 1
| NA oz
| Connects lead screw to base plate
| Steel
| Extrusion/Bending
|
|
C11
| Bushing
| 1
| 0.7 oz
| Used to align two Connecting arms and create a low friction surface for Connecting arms to pivot about
| Brass
| Roll forming
|
|
C12
| Plastic spacer
| 1
| 0.05 oz
| Placed concentric with Bushing between two connecting arms to provide low friction surface and prevent the arms from wearing against one another
| Plastic
| Injection molding
|
|
C12
| Scissor pin bolt
| 1
| 0.3 oz
| Joins two handle assemblies together, passes though Bushing to create main joint around which handles pivot
| Steel
| Upset forging
|
|
C13
| M10 washer
| 1
| 0.1 oz
| Increases surface area over which compressive force of the tightened bolt and nut is applied, placed between nut and surface and/or bolt head and surface to prevent damage to surface when nut is tightened
| Steel
| Stamping
|
|
C14
| M10 lock nut with nylon insert
| 1
| 1.3 oz
| Threads onto scissor pin bolt and tightened to join connecting arms together. Nylon insert prevents nut from loosening
| Steel
| Forging
|
|
C17
| Digging head pivot bolt
| 1
| 0.8 oz
| Connects two digging heads together, creates pivot point around which digging heads open and close
| Steel
| Upset forging
|
|
C18
| Large plastic spacer
| 2
| 0.1 oz
| Placed on pivot bolt to align two digging heads and protect pivot bolt
| Plastic
| Injection molding
|
|
C19
| Small plastic spacer
| 1
| 0.05 oz
| Placed on pivot bolt to align two digging heads and protect pivot bolt
| Plastic
| Injection molding
|
|