simon/tricycle-mechanical-design
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Started work on microcar suspension

Browse source
This commit is contained in:
Simon Brooke 2026-09-01 20:59:01 +01:00
parent be42bd388f
commit 66e772172b
2 changed files with 139 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

40
microcar/tub.scad
View file

@ -11,7 +11,11 @@ bb_width = 260; // internal width of battery box
* moment I'm making the simlifying assumption that it
* is horizontal.
****************************************************/
cowl_height = 550;
// slope of the cowl
cowl_angle = -70;
// maximum height of the cowl (at the A pillar)
cowl_height = 450;
floor_length = 1100;
floor_width = 1500;
@ -21,8 +25,10 @@ floor_width = 1500;
* which bonds to the front or rear bulkhead from the
* layback angles, but I'm being lazy for now
****************************************************/
layback_angle_f = 60;
layback_angle_r = 60;
// angle of the front bulkhead to vertical
layback_angle_f = 30;
// angle of the rear bulkhead to vertical
layback_angle_r = 45;
sheet_thickness = 8;
sill_max_height = bb_height;
@ -31,27 +37,31 @@ sill_width = 150;
module battery_box_side( floor_length = 1100) {
fhl = (floor_length/2);
top_hl = 800; // calculate this later
top_hlf = (bb_height * tan(layback_angle_f)) + fhl;
top_hlr = (bb_height * tan(layback_angle_r)) + fhl;
rotate([90, 0 , 0])
linear_extrude( height=sheet_thickness) {
polygon([[ 0 - fhl, 0],
[ fhl, 0],
[ top_hl, bb_height],
[ 0 - top_hl, bb_height]]);
[ top_hlr, bb_height],
[ 0 - top_hlf, bb_height]]);
}
}
module battery_box( floor_length = 1100) {
top_hl = 800; // calculate this later
hbbw = bb_width/2;
bias = (layback_angle_f == layback_angle_r) ? 0 : bb_height * ( tan(layback_angle_r) - tan(layback_angle_f))/2;
translate([0, hbbw, 0])
battery_box_side( floor_length);
translate([0, 0 - (hbbw + sheet_thickness), 0])
battery_box_side( floor_length);
translate([0, 0 - hbbw, 0])
cube([sheet_thickness, bb_width, bb_height]);
translate([0, 0 - sheet_thickness, bb_height])
cube([1600, bb_width + (sheet_thickness * 2),
translate([bias, 0 - sheet_thickness, bb_height])
cube([floor_length + (bb_height * tan(layback_angle_f)) +
(bb_height * tan(layback_angle_r)), bb_width + (sheet_thickness * 2),
sheet_thickness],
center = true);
}
@ -59,13 +69,14 @@ module battery_box( floor_length = 1100) {
module sill( floor_length = 1100) {
cr = 5000;
fhl = (floor_length/2);
top_hl = 800; // calculate this later
top_hl = fhl + (cowl_height * tan(layback_angle_f));
top_hlr = fhl + (sill_max_height * tan(layback_angle_r));
difference() {
rotate([90, 0 , 0])
linear_extrude( height=sill_width) {
polygon([[ 0 - fhl, 0],
[ fhl, 0],
[ top_hl, sill_max_height],
[ top_hlr, sill_max_height],
[ 0, sill_min_height],
[ a_pillar_y, sill_min_height],
[ a_pillar_y, cowl_height],
@ -79,6 +90,14 @@ module sill( floor_length = 1100) {
}
module front_bulkhead() {
e = cowl_height / cos(layback_angle_f);
translate([ 0 - floor_length/2, 0 -floor_width/2, 0])
rotate([0, 0- layback_angle_f, 0])
cube([sheet_thickness, floor_width, e]);
}
module rear_bulkhead() {
}
@ -94,3 +113,4 @@ mirror([0, 1, 0])
( floor_width/2) + (sill_width/2), 0])
sill();
front_bulkhead();