Foldable push-pull vehicle

Abstract

The invention relates to a foldable push-pull cart which comprises an upper U-shaped horizontal pipe A, an upper U-shaped horizontal pipe B, a lower U-shaped horizontal pipe A, a lower U-shaped horizontal pipe B, a middle U-shaped horizontal pipe, a vertical U-shaped pipe, an upper side push-pull pipe, a lower side push-pull pipe, an upper longitudinal pipe A, an upper longitudinal pipe B, a lower longitudinal pipe A, a lower longitudinal pipe B, a middle longitudinal pipe, a middle transverse pipe and a vertical pipe. The folding device comprises a side fixed connecting pipe folding device, a side sliding folding device, a middle sliding folding device, a side fixed connecting pipe middle vertical pipe folding device, a cross folding device and a four-corner drawing rod folding device, and is characterized by comprising an upper support, a lower support, a transverse horizontal pipe A, a transverse horizontal pipe B, a transverse cross pipe, a rigid hinge device and the like, a side fixed connecting pipe folding device, a side sliding folding device, a middle sliding folding device, a side fixed connecting pipe middle vertical pipe folding device and a cross folding device, the foldable push-pull cart can be folded into a sheet shape or a stick shape smoothly in more than ten folding modes such as a transverse composite cross folding device and a rigid hinge device, the foldable push-pull cart has high system rigidity when unfolded, and the folded foldable push-pull cart is small in size and convenient to carry and place.

Description

technical field [0001] The invention relates to furniture products, belonging to indoor and outdoor transportation products, in particular to push and pull carts that can be folded and unfolded conveniently. Background technique [0002] Most of the existing push-pull carts for indoor and outdoor transportation products are integrally fixed and cannot be folded and unfolded. When placed, they occupy a relatively large space. , although there are a few kinds of push-pull carts that can be folded and unfolded, but because they are all non-rigid hinges, the folding and unfolding structure is cumbersome, and the folding principle and folding method make the connection rigidity of the unfolded push-pull carts poor and the bearing capacity is not enough. For this reason, people wish to have a class of simple structure, low cost of manufacture, light weight, easy to carry, good system hinge rigidity after unfolding, small volume after folding, and foldable push-pull carts that can ...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing push-pull carts for indoor and outdoor transportation products are integrally fixed and cannot be folded and unfolded. When placed, they occupy a relatively large space. , although there are a few kinds of push-pull carts that can be folded and unfolded, but because they are all non-rigid hinges, the folding and unfolding structure is cumbersome, and the folding principle and folding method make the connection rigidity of the unfolded push-pull carts poor and the bearing capacity is not enough. For this reason, people wish to have a class of simple structure, low manufacturing cost, light weight, easy to carry, good hinged rigidity of the system after unfolding, small volume after folding, and foldable push-pull carts that can be placed and used indoors and outdoors

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