Folding cart

1. A folding cart, comprising a front frame and a rear frame arranged front and back, and a side frame arranged between the front frame and the rear frame for unfolding and folding, wherein the side frame at least comprises a front top rod, a front bottom rod, a rear top rod, a rear bottom rod, a front inclined rod, a rear inclined rod, and a pivoting mechanism;

a front end of each of the front top rod and the front bottom rod is respectively pivotally connected to an upper side and a lower side of the front frame, a rear end of each of the rear top rod and the rear bottom rod is respectively pivotally connected to an upper side and a lower side of the rear frame, a rear end of the front bottom rod is pivotally connected to a front end of the rear bottom rod, a front end of the front inclined rod is pivotally connected to the lower side of the front frame, and a rear end of the rear inclined rod is pivotally connected to the lower side of the rear frame; and

the pivoting mechanism is respectively connected to a rear end of the front top rod, a front end of the rear top rod, a rear end of the front inclined rod, and a front end of the rear inclined rod, and enables the four to be pivotally connected to each other;

wherein the pivoting mechanism is pivotally connected to the front top rod through a front top pivot seat, and a front side of the front top pivot seat is pivotally connected to the rear end of the front top rod, and a rear side of the front top pivot seat is pivotally connected to the pivoting mechanism; and

the pivoting mechanism is pivotally connected to the rear top rod through a rear top pivot seat, and a rear side of the rear top pivot seat is pivotally connected to the front end of the rear top rod, and a front side of the rear top pivot seat is pivotally connected to the pivoting mechanism.

2. The folding cart according to claim 1 , wherein the pivoting mechanism comprises a front top joint, a rear top joint, a front inclined joint, and a rear inclined joint that are pivotally connected to each other;

the front top joint is pivotally connected to a rear side of the front top pivot seat;

the rear top joint is pivotally connected to a front side of the rear top pivot seat;

the front inclined joint is connected to the rear end of the front inclined rod; and

the rear inclined joint is connected to the front end of the rear inclined rod.

3. The folding cart according to claim 2 , wherein when the folding cart is in an unfolded state, the front top joint and the rear top joint are transversely arranged, and the front inclined joint and the rear inclined joint are obliquely arranged; and

when the folding cart is folded from the unfolded state to a folded state, the front top joint and the rear top joint rotate around a pivot joint to an end away from the pivot joint and gradually approach upwards, and the front inclined joint and the rear inclined joint rotate around the pivot joint to an end away from the pivot joint and gradually approach downwards.

4. The folding cart according to claim 2 , wherein the pivoting mechanism further comprises a pivoting shaft that pivotally connects the front inclined joint, the rear inclined joint, the front top joint, and the rear top joint after passing through the four in sequence.

5. The folding cart according to claim 1 , wherein the front top pivot seat is provided with a front support rod extending downwards to be pivotally connected to the front bottom rod; and

the rear top pivot seat is provided with a rear support rod extending downwards to be pivotally connected to the rear bottom rod.

6. The folding cart according to claim 5 , wherein the front support rod and the rear support rod are vertically arranged, and when the folding cart is folded from an unfolded state to a folded state, the front top pivot seat and the rear top pivot seat are kept transversely arranged, and the front support rod and the rear support rod are kept vertically arranged.

7. The folding cart according to claim 1 , wherein the front frame comprises a front upright rod, an upper side and a lower side of the front upright rod are respectively provided with a front upper pivot seat and a front lower pivot seat, the front upper pivot seat is pivotally connected to the front end of the front top rod, and the front lower pivot seat is pivotally connected to the front end of each of the front bottom rod and the front inclined rod, respectively; and

the rear frame comprises a rear upright rod, an upper side and a lower side of the rear upright rod are respectively provided with a rear upper pivot seat and a rear lower pivot seat, the rear upper pivot seat is pivotally connected to the rear end of the rear top rod, and the rear lower pivot seat is pivotally connected to the rear end of each of the rear bottom rod and the rear inclined rod, respectively.

8. A folding cart, comprising a front frame and a rear frame arranged front and back, and a side frame arranged between the front frame and the rear frame for unfolding and folding, wherein the side frame at least comprises a front top rod, a front bottom rod, a rear top rod, a rear bottom rod, a front inclined rod, a rear inclined rod, and a pivoting mechanism;

a front end of each of the front top rod and the front bottom rod is respectively pivotally connected to an upper side and a lower side of the front frame, a rear end of each of the rear top rod and the rear bottom rod is respectively pivotally connected to an upper side and a lower side of the rear frame, a rear end of the front bottom rod is pivotally connected to a front end of the rear bottom rod, a front end of the front inclined rod is pivotally connected to the lower side of the front frame, and a rear end of the rear inclined rod is pivotally connected to the lower side of the rear frame; and

the pivoting mechanism is respectively connected to a rear end of the front top rod, a front end of the rear top rod, a rear end of the front inclined rod, and a front end of the rear inclined rod, and enables the four to be pivotally connected to each other;

wherein the rear end of the front bottom rod is provided with a front bottom pivot pipe, the front end of the rear bottom rod is provided with a rear bottom pivot seat, the rear bottom pivot seat is pivotally connected to the middle of the front bottom pivot pipe, and when the folding cart is in the unfolded state, the front bottom pivot pipe abuts against an upper side face of the rear bottom rod.

9. A folding cart, comprising a front frame and a rear frame arranged front and back, and a side frame arranged between the front frame and the rear frame for unfolding and folding, wherein the side frame at least comprises a front top rod, a front bottom rod, a rear top rod, a rear bottom rod, a front inclined rod, a rear inclined rod, and a pivoting mechanism;

a front end of each of the front top rod and the front bottom rod is respectively pivotally connected to an upper side and a lower side of the front frame, a rear end of each of the rear top rod and the rear bottom rod is respectively pivotally connected to an upper side and a lower side of the rear frame, a rear end of the front bottom rod is pivotally connected to a front end of the rear bottom rod, a front end of the front inclined rod is pivotally connected to the lower side of the front frame, and a rear end of the rear inclined rod is pivotally connected to the lower side of the rear frame; and

the pivoting mechanism is respectively connected to a rear end of the front top rod, a front end of the rear top rod, a rear end of the front inclined rod, and a front end of the rear inclined rod, and enables the four to be pivotally connected to each other;

wherein the rear inclined rod is provided with a folding hook, the front inclined rod is provided with a folding buckle, and when the folding cart is in a folded state, the folding hook can be locked on the front inclined rod through the folding buckle, enabling the folding cart to be kept in the folded state.