Abstract: The present invention relates to a bearing structure having a top end face, a bottom end face, and a bore communicating with the top and bottom end faces, and having at least two oil-guide channel disposed on the inner wall of the bore, extending axially and penetrating one of the same end faces of the bearing. When the present invention is applied to a motor structure, the oil-guide channel is upwardly or downwardly disposed by penetrating the top or bottom end face of the bearing. Hence, when lubricant is churned by the spindle to permeate and diffuse, the oil-guide channel can block and collect the rising lubricant for the bearing to absorb, circulate and reuse again in a timely manner, thereby effectively preventing lubricant from draining and prolonging the operational lifespan of a motor.

Abstract: The present invention relates to a shock-absorbent structure of serially-connected fans. The serially-connected fans at least include two fan frames. A shock-absorbent element is disposed between the bonded surfaces of the fan frames and is made of a flexible material being shock-absorbent and damping. Therefore, when the fan rotor inside the fan frame rotates, the fundamental frequencies of two fan rotors are damped, and absorbed by the shock-absorbent element, thereby preventing the interaction of the fundamental frequencies from generating severe resonant effect and noise out of vibration and maintaining the optimized efficacy and the life span of the system.

Abstract: The present invention relates to a shock-absorbent structure of serially-connected fans. The serially-connected fans at least include two fan frames. A shock-absorbent element is disposed between the bonded surfaces of the fan frames and is made of a flexible material being shock-absorbent and damping. Therefore, when the fan rotor inside the fan frame rotates, the fundamental frequencies of two fan rotors are damped, and absorbed by the shock-absorbent element, thereby preventing the interaction of the fundamental frequencies from generating severe resonant effect and noise out of vibration and maintaining the optimized efficacy and the life span of the system.

Abstract: Disclosed is an improved precast concrete slab comprising a slab body formed of a composite of expandable sintered stones, glass fibers, and foam concrete; at least a layer of non-metallic material having pores for filling in the slab body is provided in the middle portion of the slab body; the concrete slab may be molded singly or cut from a pre-molded concrete block formed of the above-mentioned composite materials and having arranged therein a multiplicity of layers of non-metallic material.