For a long time I enjoyed long ago acquired by manual uniaxial shopping cart (unfortunately, information about the manufacturer not preserved). But remember, in the passport on the cart was given data: load capacity — 25 kg weight — 6.5 kg. the Trolley is made, that is, the conscience, the design is reliable, very simple moves from transport to working position, and it happens that I’m on it loads up to 50 kg, that is twice the nameplate figure. Now it is clear that the manufacturer of the truck was safe and resulted in low capacity, as the possibility of a much larger truck. The developer could specify the actual value of the load capacity, but it was necessary to test truck durability.
It should be noted that the hand truck is manufactured under the motto “Faster, higher, further!”, therefore, an important indicator led intuitive, “eyeball”. The experience of operating the truck gave me the idea that the capacity of 25 kg will provide a design with smaller dimensions and less metal. In line with this, the product should be inexpensive, have low weight and to occupy a folded up very little space. Given that their Guest (“solid rubber Tyres”) the parameters can easily be identified that full load in 25 kg withstands very small bus disc type with a diameter of 40…60 mm and a rim width of 20 mm. Finally the design is “ripe” in my head after reading in the journal “modelist-Konstruktor” No. 11, 1989, notes a “Triangle-cart” on the application of the cane to control the hand truck. In the end I managed to solve the technical problem, adding to the lineup of hand trucks yet another product.
Fig. 1. Manual household mini-truck increased load capacity:
1—crank; 2—pole (cutting spade for d40); 3—suspension; 4—clip (steel, sheet s2); 5—angled bracket (steel, sheet s); 6—screw (04×16, 5 PCs); 7—steel rivet (d4x10, 2); 8—arc backrest; 9—load bar; 10—pair of wheels with axle
Designed and manufactured a truck to use for four years. She moves very well on the asphalt surface, slightly worse on the compacted dirt road.