What is the principle of lean management cycle transfer design?

The design principle of workshop turnover vehicles is to separate and solve the three tasks of "carrying, moving, and operating", and then integrate them into a stable, efficient, and easy to push mobile platform through structure. Whether it is light or heavy load, it revolves around these main lines.

1、 Load bearing and capacity dispersion
This is the first priority of design. The load is transmitted from the platform panel to the main and secondary beams, and then dispersed to the wheel sets to avoid stress concentration.

-Structural form: Welded frames or lean pipes are used for light vehicles, and I-beams and box beams are welded into space trusses for heavy-duty vehicles to ensure bending and torsional stiffness.
-Balance beam mechanism: Each set of wheels of the heavy-duty vehicle is connected by a hinged "balance beam", and the wheels float independently when the ground is uneven, evenly distributing the weight to each wheel to avoid single wheel overload.
-Ground pressure: When designing, the ground pressure of the wheels should be calculated to ensure that it is lower than the allowable compressive strength of the workshop floor, otherwise the ground will be crushed.

2、 Moving and Turning
Whether it's easy to push depends on the wheels and steering mechanism.

-Wheel selection: The workshop floor is uneven and has oil stains. Solid rubber or polyurethane wheels are generally used, which are wear-resistant, non bursting, and have low rolling resistance. Light load with 2 universal joints and 2 directional joints, flexible and stable turning; For heavy loads, use all wheel steering or fixed axis steering, and even support stationary rotation.
-Driving method: manually pushing to reduce the rolling friction coefficient to an extremely low level; For heavy-duty or powered vehicles, motors and reducers are generally used, with independent driving and synchronous control on both sides to avoid deviation.
-Special case for long workpieces: Transport vehicles over 4 meters in length will use a rotary steering system with front wheel steering and rear wheel orientation, and can also make U-turns on channels 2 meters wide.

3、 Operation and Human Machine Engineering
A car is designed for human use, and only when it is easy and effortless to pick up and place can it be considered qualified.

-Layers and spacing: For small items, add layers; for large items, reduce layers and increase spacing; Common materials are placed on the upper layer, and heavy objects are placed on the lower layer for more stable pushing.
-Storage is arranged according to the process: the maintenance cart arranges tools in the order of "disassembly, inspection, replacement, and installation", with disassembly tools placed on the upper layer, detection instruments hung on the side, and spare parts placed in the bottom basket. There is no need to flip back and forth when working.
-Easy loading and unloading: Foldable, stackable, equipped with forklift cover and tractor, no space occupied by empty vehicles, multiple vehicles can be pulled in a row.