Simple vehicle rack

1. A simple vehicle rack comprising:

a fixing rod, a middle part of the fixing rod being an H-shaped reinforcing seat, the H-shaped reinforcing seat forming an upper sliding slot on a top surface of the fixing rod and forming a lower sliding slot on a bottom surface of the fixing rod;

two fixing frames, the fixing frames being fixed on the top surface of the fixing rod and connected to the fixing rod, moving back and forth along the upper sliding slot; and

two support frames, the support frames being fixed on the bottom surface of the fixing rod and connected to the fixing rod, moving back and forth along the lower sliding slot;

wherein:

both sides of the upper sliding slot include upper locking sheets that extend inward;

both sides of the lower sliding slot include lower locking sheets that extend inward;

the two fixing frames each include an I-shaped slide block extending from the bottom of the fixing frames;

an end of the top of the I-shaped slide block is connected to a knob connecting part;

two knobs each pass through the knob connecting part and connects with a first clamping plate at a lower surface of the knob connecting part;

the fixing frames connect the upper sliding slot through the I-shaped slide block;

the lower surface of the knobs connecting part and the clamping plate are clamped together with the upper locking sheets via the knobs;

the supporting frames each includes a second clamping plate, the second clamping plate being connected to the supporting frames by a bolt;

the second clamping plate is clamped with the lower locking sheets via the bolt;

the two fixing frames each include a top fixed hole and a bottom fixed hole that are of different heights and vertically placed on top of the I-shaped slide block, the top fixed hole has a triangular shape, and the bottom fixed hole has a trapezoidal shape; and

the two fixing frames and the two knobs are each located at corresponding ends of the I-shaped slide block and extend upward.

2. The simple vehicle rack according to claim 1 , wherein

the supporting frames each includes an upper connector;

the upper connector includes a bolt connecting part; and

the bolt passes through the bolt connecting part and the second clamping plate to clamp the lower locking sheets.

3. The simple vehicle rack according to claim 1 , wherein

the fixing rod includes closed covers at both ends, and the closed covers seal both ends of the upper sliding slot and the lower sliding slot.

4. The simple vehicle rack according to claim 1 , wherein

the supporting frames each includes a lower connector;

a fixed seat is provided under the lower connector;

the fixed seat includes a seat body, a moving clamp, and a fastening bolt;

the seat body is a right-angle aluminum alloy plate and includes a sliding slot on top, the top surface of the seat body connecting with the lower connector;

the moving clamp is a C-shaped aluminum alloy clamp and includes a slider and a fastening bolt hole; and

the fastening bolt passes through the fastening bolt hole to secure the seat body to a vehicle.

5. The simple vehicle rack according to claim 4 , wherein

the supporting frames each include two moving clamps and two fastening bolts.

6. The simple vehicle rack according to claim 5 , wherein

a fastening block is provided on the top of the fastening bolt.