1module beam(r1, r2, shr, msr){
2  /* The walking beam acts as a class I lever transferring the
3   * movement from the pitmans arms to the horse head. */
4
5  H = 12; // Height
6  W = 10; // Width
7  e = 10; // Total added extension
8
9  difference(){
10      union(){
11          translate([(r2-r1)/2,0,H/2]) // Walking beam body
12              cube([r1+r2+e, W, H], center = true);
13
14          rotate([90, 0, 0]) // Fulcrum or pivoting point
15              cylinder(r = 2*msr, h = W, center = true);
16      }
17
18      rotate([90,0,0]) // Pivoting point hole
19          cylinder(r = msr, h = W+1, center = true);
20
21      translate([r2,0,H/2]) // Equalizer mounting screw hole
22          cylinder(r = shr, h = H+1, center = true);
23
Oil Pumpjack
matiasmiche
OpenSCAD
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1hingeHalfExtrudeLength=hingeLength/2-clearance/2;
2mountingHoleMoveIncrement=(hingeLength-2*mountingHoleEdgeOffset)/
3  (mountingHoleCount-1);
4
5module costomizerEnd() {}
6$fn=30;
7tiny=0.005;
8// modules
9module hingeBaseProfile() {
10  translate([pivotRadius,0,0]){
11    square([baseWidth,baseThickness]);
12  }
13}
14
15module hingeBodyHalf() {
16  difference() {
17    union() {
18      linear_extrude(hingeHalfExtrudeLength){
19        offset(1)offset(-2)offset(1){
20          translate([0,pivotRadius,0]){
21            circle(pivotRadius);
22          }
23          square([pivotRadius,pivotRadius]);
24          hingeBaseProfile();
25        }
26      }
27      linear_extrude(hingeLength){
28        offset(1)offset(-1)hingeBaseProfile();
29      }
30    }
31    plateHoles();
32  }
33}
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Print in Place Hinge
IrevDev
OpenSCAD
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