Preload biased structure of linear rail

A preload biased structure of a linear rail, comprising:

• a rail;
• a sliding block slidably disposed on the rail, the sliding block having:
• a sliding base, the front and rear end of the sliding base each having a positioning plate, a connecting space being formed between the two positioning plates, each positioning plate having two protruding plates and two through-holes, the two protruding plates extending integrally from both sides of the positioning plate, the protruding plate being provided with a locking hole, the through-hole passing through the protruding plate adjacent to the positioning plate, an abutting piece protruding downwards from the connecting portion between the positioning plate and the protruding plate toward the through-hole respectively, a biased block extending from one end of each abutting piece facing the connecting space, each biased block being provided with a biased slope, and the other end of each abutting piece being provided with a slope;
• a supporting element provided in the connecting space, the front and rear end of the supporting element being provided with a trough corresponding to the biased block, each biased slope guiding the supporting element to lock the biased block into the trough, thereby preloading and fixing the supporting element;
• two connecting pieces connected to the front and rear end of the sliding base respectively, each connecting piece being provided with two insertion slots corresponding to the two protruding plates of the sliding base, each protruding plate being inserted in the insertion slot, the top surface of each connecting piece being provided with two insertion holes for communicating the two insertion slots;
• and
• two locking pieces, both sides of the bottom surface of the locking piece extending downwards to form a hook respectively, the hook penetrating the insertion hole and the locking hole to be inserted into the insertion slot, thereby hooking the connecting piece to the front and rear end of the sliding base, wherein the hook abuts the slope respectively to press each biased block into the trough of the supporting element.