Crossbows - Everything about Building, Modding, and Using your Crossbow Gear

Latest topics

» how made homemade (reverse) crossbow ?
by Ricardo Yesterday at 3:56 pm

» Pump action crossbow (powerful)
by Ivanhoe Fri Jul 13, 2018 7:50 am

» nut from antler
by OrienM Thu Jul 05, 2018 8:50 am

» Limb harding\ tempering ?
by OrienM Thu Jul 05, 2018 8:48 am

» Wooden Crossbows - Seeking Info
by kenh Sun Jun 24, 2018 8:53 pm

» Nut from a pool que ball?
by drawknife Sun Jun 17, 2018 5:29 am

» my composite crossbow lath project
by stuckinthemud1 Fri Jun 15, 2018 6:07 am

» Trouble with my Gafa
by drawknife Fri Jun 15, 2018 2:56 am

» Do all triggers Have claws - what types and claw or no claw
by globalmark Thu Jun 14, 2018 12:19 am

» For Sale: Masai Crossbow
by TonyU Mon Jun 11, 2018 1:15 pm

» Medieval composite bows
by juanjo Fri Jun 08, 2018 5:10 am

» yew and sinew prod help needed
by stuckinthemud1 Thu Jun 07, 2018 1:34 am

» Small gothic crossbow (with wooden lever)
by OrienM Fri Jun 01, 2018 10:35 am

» Binding on the stirrup
by Geezer Sat May 26, 2018 7:26 am

» horn inlay and veneer
by OrienM Thu May 24, 2018 8:44 pm

» Presentation
by c sitas Wed May 23, 2018 4:31 pm

» My latest crossbow
by drawknife Tue May 22, 2018 3:13 pm

» The Arbalist Guild - Around the World
by stuckinthemud1 Sun May 20, 2018 5:32 am

» angles and rivets
by Geezer Fri May 18, 2018 1:16 pm

» morticed nut blocks
by Dark Factor Wed May 16, 2018 12:02 pm

» Crossbow triggers
by Croftage Mon May 14, 2018 1:41 pm

» Cocking lever
by c sitas Fri May 11, 2018 8:09 am

» Late roman crossbow
by Dark Factor Wed May 09, 2018 10:27 am

» Powermaster Madness
by Archer46176 Sun May 06, 2018 8:08 pm

» Fast loading crossbow
by septua Mon Apr 23, 2018 9:22 am


    Medieval crossbow modeled in Tinkercad, with variant trigger design.

    Share

    Bs1110101
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 22
    Join date : 2013-09-12

    Medieval crossbow modeled in Tinkercad, with variant trigger design.

    Post by Bs1110101 on Mon Apr 10, 2017 3:08 am

    This mostly came about as an extension of modeling a crossbow nut so i could machine it during the open lab of my machining class, so i thought i'd model the rest of it so i'd have more exact dimensions for the trigger and whatnot. 

    The second design came about as an idea to get away from tracking down 3/8 square stock and some way to bend it, while it still uses 3/8 square stock in this model, it gets away from the large zig-zag bend most designs have, allowing for and unbent primary lever, and a secondary lever under much less strain to the point it could be made from wood even. These are connected by a simple sliding pin. I speculate canting this pin backwards may be helpful, giving you a longer, but lighter trigger pull. A single compression spring could be used for both levers by simply drilling through the wood between them ahead of the privet for the primary lever and behind that of the secondary lever, and would be held captive by the secondary lever once attached. Like a pinlock design, some means would be needed to keep the lever from rotating too far away from the stock. A similar modification could be made to a claplock design as well. Also credit to the plans on alcheminc.com, which inspired the design. 

    The model is publicly available here.


    avatar
    kenh
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 767
    Join date : 2012-08-03
    Age : 70
    Location : Living Aboard a Sailboat in Fort Myers, FL

    Re: Medieval crossbow modeled in Tinkercad, with variant trigger design.

    Post by kenh on Mon Apr 10, 2017 5:26 am

    Your second idea is really nice, but the "sliding pin" needs a "return spring" on top of the sear lever to push everything back into proper position to cock for the next shot

    Bs1110101
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 22
    Join date : 2013-09-12

    Re: Medieval crossbow modeled in Tinkercad, with variant trigger design.

    Post by Bs1110101 on Mon Apr 10, 2017 1:42 pm

    I'm aware of this, a single coil spring could be used to spring load both levers if placed vertically between the pivots. A few other places could work for either leaf springs or coil springs, but i generally leave them out of designs, partly because springs are hard to model, and partly because i simply use what springs i have laying around, or make them from old saw blades. 

    Also an idea: This second design would allow the trigger to slide forward while either locked, or set so it would be locked when pushed into the string, meaning this trigger design could work for a crossbow with a cocking mechanism where the whole trigger mechanism slid forward then back with the string. I'm not exactly a fan of this design, but i'm sure i've seen a crossbow with it somewhere.

    Sponsored content

    Re: Medieval crossbow modeled in Tinkercad, with variant trigger design.

    Post by Sponsored content


      Current date/time is Sun Jul 15, 2018 3:05 pm