Lead-screw post hole digger

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(→'''List of Parts''')
(→'''List of Parts''')
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{| class="wikitable" border="1"
{| class="wikitable" border="1"
-
|+ '''Table 4.2: Individual Components of Complex Post Hole Digger'''
+
|+ '''Table *****: Individual Components of Redesigned Post Hole Digger'''
! Part Number !! Name !! Qty. !! Weight !! Function !! Material !! Manufacturing Process !! Image
! Part Number !! Name !! Qty. !! Weight !! Function !! Material !! Manufacturing Process !! Image
|-
|-
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| style="text-align: center;" | 1
| style="text-align: center;" | 1
| style="text-align: center;" | NA oz
| style="text-align: center;" | NA oz
-
| Constrains inner parts of tool and handles physical stresses of digging, etc.
+
| Constrains inner parts of tool and handles physical stresses of digging
| T 6061 Aluminum
| T 6061 Aluminum
| Extrusion
| Extrusion
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|-
|-
-
| style="text-align: center;" | 2
+
| style="text-align: center;" | 2  
-
| Guide bushing
+
| Central rod
-
| style="text-align: center;" | 2
+
| style="text-align: center;" | 1
| style="text-align: center;" | NA oz
| style="text-align: center;" | NA oz
-
| Constrains central rod to maintain linear motion within shaft
+
| Transmits rotational motion of lead screw into translational motion, forcing shovels closed
| T 6061 Aluminum
| T 6061 Aluminum
-
| Lathe???
+
| Extrusion
-
| [[Image:Complex_post_hole_digger_handle_end_cap.jpg|100px]]
+
| [[Image:Complex_post_hole_digger_fiberglass_handle.jpg|100px]]
|-
|-
| style="text-align: center;" | 3  
| style="text-align: center;" | 3  
-
| Central rod
+
| Crank
| style="text-align: center;" | 1
| style="text-align: center;" | 1
| style="text-align: center;" | NA oz
| style="text-align: center;" | NA oz
-
| Transmits rotational motion of lead screw into translational motion, forcing shovels closed
+
| Turned by user to close ''shovels''
| T 6061 Aluminum
| T 6061 Aluminum
| Extrusion
| Extrusion
-
| [[Image:Complex_post_hole_digger_fiberglass_handle.jpg|100px]]
+
| [[Image:Complex_post_hole_digger_grip.jpg|100px]]
 +
|-
 +
 
 +
| style="text-align: center;" | 4
 +
| Shovel
 +
| style="text-align: center;" | 2
 +
| style="text-align: center;" | NA oz
 +
| Contain dirt when digging
 +
| Steel
 +
| Stamping
 +
| [[Image:Complex_post_hole_digger_small_locknut.jpg|100px]]
 +
|-
 +
 
 +
| style="text-align: center;" | 5
 +
| Shaft handle
 +
| style="text-align: center;" | 2
 +
| style="text-align: center;" | 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
 +
| [[Image:Complex_post_hole_digger_grip.jpg|100px]]
 +
|-
 +
 
 +
| style="text-align: center;" | 6
 +
| Handle peg
 +
| style="text-align: center;" | 4
 +
| style="text-align: center;" | NA oz
 +
| Allow user to force tool into the ground using his/her foot
 +
| T 6061 Aluminum
 +
| Extrusion
 +
| [[Image:Complex_post_hole_digger_small_locknut.jpg|100px]]
 +
|-
 +
 
 +
| style="text-align: center;" | 7
 +
| Guide bushing
 +
| style="text-align: center;" | 2
 +
| style="text-align: center;" | NA oz
 +
| Constrains ''central rod'' to maintain linear motion within ''shaft''
 +
| T 6061 Aluminum
 +
| Extrusion
 +
| [[Image:Complex_post_hole_digger_handle_end_cap.jpg|100px]]
|-
|-
-
| style="text-align: center;" | 4
+
| style="text-align: center;" | 8
| Lead screw
| Lead screw
| style="text-align: center;" | 1
| style="text-align: center;" | 1
| style="text-align: center;" | NA oz
| style="text-align: center;" | NA oz
-
| Transmits rotation of handle into translation of central rod
+
| Transmits rotation of ''crank'' into translation of ''central rod''
| Steel
| Steel
| Automated CNC lathe/threading machine
| Automated CNC lathe/threading machine
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|-
|-
-
| style="text-align: center;" | 5
+
| style="text-align: center;" | 9
| Lead screw nut
| Lead screw nut
| style="text-align: center;" | 1
| style="text-align: center;" | 1
| style="text-align: center;" | NA oz
| style="text-align: center;" | NA oz
-
| Constrains lead screw
+
| Constrains ''lead screw''
| Brass
| Brass
| Automated CNC milling
| Automated CNC milling
Line 56: Line 96:
|-
|-
-
| style="text-align: center;" | 6
+
| style="text-align: center;" | 10
-
| Lead nut bushing
+
| Lead screw nut bushing
| style="text-align: center;" | 1
| style="text-align: center;" | 1
| style="text-align: center;" | NA oz
| style="text-align: center;" | NA oz
-
| Constrains lead nut and locates it within shaft
+
| Constrains ''lead screw nut'' and locates it within ''shaft''
| T 6061 Aluminum
| T 6061 Aluminum
| Lathe???
| Lathe???
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|-
|-
-
| style="text-align: center;" | 7
+
| style="text-align: center;" | 11
| Inline ball joint
| Inline ball joint
| style="text-align: center;" | 1
| style="text-align: center;" | 1
| style="text-align: center;" | NA oz
| style="text-align: center;" | NA oz
-
| Translates rotation of lead screw to translation of central rod and connects the two parts
+
| Translates rotation of ''lead screw'' to translation of ''central rod'' and connects the two parts
| Steel
| Steel
| ???
| ???
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|-
|-
-
| style="text-align: center;" | 8
+
| style="text-align: center;" | 12
| Shovel link
| Shovel link
| style="text-align: center;" | 2
| style="text-align: center;" | 2
| style="text-align: center;" | NA oz
| style="text-align: center;" | NA oz
-
| Connects central rod to shovels
+
| Connects ''central rod'' to ''shovels''
| T 6061 Aluminum
| T 6061 Aluminum
| Extrusion
| Extrusion
| [[Image:Complex_post_hole_digger_fender_washer.jpg|100px]]
| [[Image:Complex_post_hole_digger_fender_washer.jpg|100px]]
-
|-
 
-
 
-
| style="text-align: center;" | 9
 
-
| Shovel
 
-
| style="text-align: center;" | 2
 
-
| style="text-align: center;" | NA oz
 
-
| Contain dirt when digging
 
-
| Steel
 
-
| Stamping
 
-
| [[Image:Complex_post_hole_digger_small_locknut.jpg|100px]]
 
|-
|-

Revision as of 21:58, 28 November 2008

List of Parts

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
C10 M8 washer 3 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
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
C15 Digging head 2 26.3 oz Provides means of digging into dirt, sizing the hole, and removing dirt Steel Stamping
C16 Digging head connecting bolt 2 0.8 oz Joins connecting arm to digging head, allows connecting arm and digging head to pivot Steel Upset 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
Retrieved from "https://wiki.ece.cmu.edu/ddl/index.php/Lead-screw_post_hole_digger"
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