bh=0.8;
$fn=32;
bx=32;
by=67;
tx=41;
module dou() {
difference() {
linear_extrude(height = 30,twist=0,scale=[(tx+bh)/bx,(tx+bh)/by])polygon(points=[[-bx/2,-by/2],[bx/2,-by/2],[bx/2,by/2],[-bx/2,by/2]]);
//translate([19-bx/2,55-by/2,0]) cube([27,21,30]);
translate([9.5,6.8,0])dy();
}
translate([-tx/2,-tx/2,30]) cube([tx,tx,10]);
}
module allt() {
 difference() {
translate([-10.5,-7.8,0]) allt0();
dy();
}
}
module allt0() {
difference() {
union(){
translate([-bh,-bh,0]) dou();
translate([-bh,bh,0]) dou();
translate([bh,-bh,0]) dou();
translate([bh,bh,0]) dou();
}
dou();
translate([-bx/2+26.5,-by/2+5.1,0]) cylinder(h=30,r=3.5); //螺丝刀孔
translate([-bh,68,0]) cube([22+bh+bh,20,bh]);
}
translate([-tx/2,-tx/2,30.5]) {  //风扇台阶
difference() {
 cube([tx,tx,0.8]);
translate([bh-0.2,bh-0.2,0]) cube([tx-bh-bh+0.2+0.2,tx-bh-bh+0.2+0.2,0.8]);
}
}
translate([-bx/2,-by/2-bh,0]){ //螺丝孔
difference() {
translate([22,0,0]) cube([11,56.5,bh]);
translate([26.5,6,0]) cylinder(h=bh,r=1.5);
translate([26.5,6+18,0]) cylinder(h=bh,r=1.5);
translate([26.5,6+36,0]) cylinder(h=bh,r=1.5);
}

difference() {
translate([26.5,6,0]) cylinder(h=24,r=4.6);
 translate([26.5,6,0]) cylinder(h=24,r=3.4); //螺丝刀孔
}

 difference() {
translate([-bh,68,0]) cube([22+bh+bh,26,bh]);
}
}
}

module dt(h0) {
linear_extrude(height = h0)
  polygon(points=[[-23.5,-38.8],[-20.5,-41.8],[-6,-41.8],
[-3,-38.8],
[-3,14],[-6,14],
[-6,32],[-3,32],
[-3,44.2],
[-6,47.2],[-20.5,47.2],
[-23.5,44.2],[-25,34.2],[-25,-28.8]]);
translate([-20.5,-38.8,0]) cylinder(h=h0,r=3);
translate([-6,-38.8,0]) cylinder(h=h0,r=3);
translate([-6,44.2,0]) cylinder(h=h0,r=3);
translate([-20.5,44.2,0]) cylinder(h=h0,r=3);
}

module dt0(h0) {
linear_extrude(height = h0)
  polygon(points=[
 [bh-23.5,-38.8+bh],[-20.5+bh,-41.8+bh],[-6-bh,-41.8+bh],
[-3-bh,-38.8+bh],
[-3-bh,14-bh],[-6-bh,14-bh],
[-6-bh,32+bh],[-3-bh,32+bh],
[-3-bh,44.2-bh],
[-6-bh,47.2-bh],[-20.5+bh,47.2-bh],
[-23.5+bh,44.2-bh],[-25+bh,34.2-bh],[-25+bh,-28.8+bh]]);
translate([-20.5+bh,-38.8+bh,0]) cylinder(h=h0,r=3);
translate([-6-bh,-38.8+bh,0]) cylinder(h=h0,r=3);
translate([-6-bh,44.2-bh,0]) cylinder(h=h0,r=3);
translate([-20.5+bh,44.2-bh,0]) cylinder(h=h0,r=3);
}
module dta(bh0,h0) {
 
difference() {
union(){
translate([-bh0,-bh0,0]) dt(h0);
translate([-bh0,bh0,0]) dt(h0);
translate([bh0,-bh0,0]) dt(h0);
translate([bh0,bh0,0]) dt(h0);
}
dt(h0);
}
}
module dtb(h0) {
difference(){
dt(h0);
dt0(h0);
}
}

module allb() {
 translate([0,0,-bh])
 difference() {
  union() {
translate([0,0,bh-5]) dtb(5); //bh调整后
dta(3,bh);
   translate([-3,-42,0]) cube([9,58,bh]);
   translate([-9,11,0]) cube([9,24,bh]);
   
}
dy();
cylinder(h=20,r=1.5);
translate([0,-18,0]) cylinder(h=20,r=1.5);
translate([0,-18-18,0]) cylinder(h=20,r=1.5);
}
}

module dy(){
translate([2.5,23,0]) cube([18,18,60],true);
}

 allt(); //上面部分
translate([0,0,-10]) allb(); //下面部分
//rotate([0,180,0]) allb(); //下面部分翻过来打印
//2部分要分别打印， 并用电烙铁把它们沾在一起