My NEW and improved push trailer connection....

Discussion in 'Push Trailers' started by macarollo, Mar 1, 2009.

  1. macarollo

    macarollo Guest

    Here are some pictures of my new motorized bike trailer connection.

    What do you think?

    My goal is that it will not break like my last setup... my thin aluminum pipe that was bolted on.

    Attached Files:

  2. macarollo

    macarollo Guest

    I am guessing this still will not make everyone happy. No there is no U-joint built into the connection... I suppose if it breaks this time that might be a necessary upgrade.

    I plan to clean up the welds a little with a grinder and paint the whole frame to keep it from rusting. I am thinking Bright Yellow!
    Last edited by a moderator: Mar 1, 2009
  3. echotraveler

    echotraveler Member

    it's gonna look great macarollo, yeah i wish it got a flexible connection but i didnt build it..

    make it rawr!

    thanx for the pics
  4. RidingJesus

    RidingJesus New Member

    I'm very glad to see your approach to safety, and your great persistence in getting this trailer right! Let us know how well it rides. I'm sure it will be a success!

  5. Mountainman

    Mountainman Active Member


    sure does look -- much better than the first one

    depending on how hard you ride
    thinking that this new setup will -- be taking some mighty force
    keep an eye on it please

    I have noted a place or two that I expect to either crack or bend in -- time
    I do not think that this will happen soon or fast
    wouldn't think it to be a safty issue

    there's just a lot of stress there and someday would think it will take a toll

    just something to watch and take care of IF or when
    weld -- your bead is comming along there

    ride the motor bike
    Last edited: Mar 2, 2009
  6. macarollo

    macarollo Guest

    Where do you see the weak spots are? Where the pipe is welded the the trailer frame? I think if it breaks somewhere it will be there.

    We shall see. I don't have a lot of options on this frame as far as welding a connection piece on. There is not a whole lot of room since the engine comes very close to the edge of the frame.
  7. Mountainman

    Mountainman Active Member

    would I get there -- I think so

    yes -- I think that it looks just a little weak there also
    you could brace that spot up some more if you wished ?
    couple of small brackets on a 45 angle
    or angle iron cut to size
    small flat piece cut out so as to fit on the bottom ?? same place

    hey -- don't get me wrong
    with just what I have seen so far
    I would be more than willing to just get right on your MB
    and take off for a very long ride
    would I get there -- I think so

    just love to ride that motor bike
  8. 5-7HEAVEN

    5-7HEAVEN Guest

    The only suspension "give" you have is your tire.

    If driven gingerly, all might go well.

    If your machine cannot take the abuse, the weakest link will fail.:detective:

    I'm saying that without a pivot either your seat post connection or trailer connection will crack.:detective:
  9. macarollo

    macarollo Guest

    I actually can lift the trailer 3 inches off the ground... there is some give at where it connects to the seatpost. There are plastic bushings in there that flex a little bit.

    It will certainly be a trial... hopefully no errors!

    I do drive carefully and I plan to continue to. I avoid all potholes and go very slowly over speed bumps... I go around them if I can.
  10. Mountainman

    Mountainman Active Member

    (strong) connectors that swivel

    I hadn't really thought much about your seatpost connection

    be careful with that thing

    you have seen the cool (strong) connectors that swivel
    this would be the way to go

    as you ride the motor bike
  11. duivendyk

    duivendyk Guest

    It's the brick outhouse construction and will last for awhile,wether you will is another matter.Welding can lead to embrittlement,how thick is that bottom frame tubing?.I wish you had used through bolts and a rubber bushing to get a more flexible connection at the bottom attachment point.Would have cut down on the vibes too. 45 degree downward lateral stays from the down tube to the bottom frame sides angled towards the rear would not have hurt either,improving front /aft stiffness and reducing flexing.Remember if you make part of a structure stiffer (the attachment boom),more of the flexing&vibration will be absorbed by other parts of the structure!(The bottom connection)
    Last edited by a moderator: Mar 3, 2009
  12. srdavo

    srdavo Active Member

    IMHO....Those are some mighty clean welds, already!

    You've had SOME practice!!! Nice!!

    now... IM 0ther HO..... :whistling: :
    the only stress point I see is where your trailer attaches to your bike. I think this should rotate freely Left & Right....and allow for some up & down movement.
    maybe one of these.
    3/4" might be overkill,,,, but would be sturdy.

    just a thought.... ride safe!!
  13. macarollo

    macarollo Guest

    It does swivel left and right fairly easily. When riding... even in most turns it stays pretty lined up... main time it swivels is if I am going slow... just turning the bike.