Announcement

Collapse
No announcement yet.

Anybody want to go for a ride????

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Anybody want to go for a ride????

    This is what I've been busting my butt designing this week.--Nahh---It isn't a hovercraft!!! I just haven't got to the wheels yet. Better this week than last week. Last week it was curved windshield assembly fixtures, which involved far too many compound angles.---It gets really nutso when you design something that is so complex that there is no way to draw it---the math data goes directly to the CNC Gods for fabrication. At least on something like this the angles are generally in only one plane.
    Brian Rupnow
    Design engineer
    Barrie, Ontario, Canada

  • #2
    A walk behind hand truck manlift cherry picker thing. A Pallet Jack on Steroids. Very cool.

    Comment


    • #3
      What type of bearings are you using for the scisor joints?

      Comment


      • #4
        Short and simple. Why?

        Comment


        • #5
          Very Brave to say the least

          Not that your design is not pure genius - because it is, but the liability to put a product like that to market is staggering.

          Once I stupidly asked the rental agent what was the replacement cost of a 120' Boom Lift. I was completely floored when he told me $645,000.00

          My initial thought was "I must be in the wrong business" but then he told me a hefty portion of that cost reflects all the testing and liability

          Comment


          • #6
            One has to ask, "Why wouldn't you just buy a scissor-lift????"

            Comment


            • #7
              Where are the sheep leg restraints? And Brian, I don't need it to go so high. Waist height would be good enough for me. And really, you need to get a model of a sheep!
              Location: The Black Forest in Germany

              How to become a millionaire: Start out with 10 million and take up machining as a hobby!

              Comment


              • #8
                Originally posted by RobbieKnobbie
                What type of bearings are you using for the scisor joints?
                Using DU style bushings. They have a steel outer shell with a sintered bronze inner liner coated with PTFE
                Brian Rupnow
                Design engineer
                Barrie, Ontario, Canada

                Comment


                • #9
                  Originally posted by knedvecki
                  One has to ask, "Why wouldn't you just buy a scissor-lift????"
                  Customer wanted the portability of a motorized truck frame, as shown.
                  Brian Rupnow
                  Design engineer
                  Barrie, Ontario, Canada

                  Comment


                  • #10
                    Originally posted by tdmidget
                    Short and simple. Why?
                    Because I get paid damn good money to do it!!!
                    Brian Rupnow
                    Design engineer
                    Barrie, Ontario, Canada

                    Comment


                    • #11
                      JoeFinn---I learned many years ago to let people with much deeper pockets than mine build and market all these wonderfull devices!!! I design them, source the purchased components, prepare engineering drawings, tender bid packages, and do project management and oversight as the machines are built. like the lawyer said---"Those are all billable hours." As far as paying the cost to actually build the machine----Thats not my part of the job. In fact, probably 10 to 15 percent of what I design (and get paid for) never actually gets built for various reasons.
                      Brian Rupnow
                      Design engineer
                      Barrie, Ontario, Canada

                      Comment


                      • #12
                        Sounds like a good deal to me. Like I say at work, "I'm just here to serve". Let others make all the [bad] decisions they want to as long as I'm getting paid to work and rework things as needed.


                        Originally posted by brian Rupnow
                        JoeFinn---I learned many years ago to let people with much deeper pockets than mine build and market all these wonderfull devices!!! I design them, source the purchased components, prepare engineering drawings, tender bid packages, and do project management and oversight as the machines are built. like the lawyer said---"Those are all billable hours." As far as paying the cost to actually build the machine----Thats not my part of the job. In fact, probably 10 to 15 percent of what I design (and get paid for) never actually gets built for various reasons.
                        "Work hard. Tell everyone everything you know. Close a deal with a handshake. Have fun!"

                        -- Harold "Doc" Edgerton

                        Comment


                        • #13
                          Originally posted by brian Rupnow
                          Using DU style bushings. They have a steel outer shell with a sintered bronze inner liner coated with PTFE
                          DU bearings from GGB?

                          I used to work for them, though I wasn't involved with the metal-backed bearings.

                          Have you looked at their Filament Wound Gar-Max (GM-xxxx)bearings? They have slightly lower PV ratings, but can handle tremendous loads and have a very thick liner layer and are very resistant to contamination. We used to sell a ton of them to several scisor lift manufacturers for exactly your application.

                          They had tremendous life spans - infact it was one of the lift makers that prompted us (err, them)to develop the low cost MLG line - not so much for the initial cost benefits, rather for the parts sales after the fact (the MLG bearings have a much thinner teflon layer and no graphite impregnantion so they wear much faster but have the same compressive wall strength.

                          You're not worried about parts sales, so the GarMax or even HSG (High Strength GarMax) would would be something to look into.

                          Comment

                          Working...
                          X