Belt pulley

Abstract

The invention discloses a belt pulley. The belt pulley includes a belt wheel and a rotary shaft, wherein a through hole is formed in the middle of the belt wheel, and used for being connected with therotary shaft. The belt pulley is characterized in that multiple dot protrusions and cooling holes are formed in the position, contacting with a belt, of the belt wheel; a limiting groove parallel tothe axis of the rotary shaft is formed in the rotary shaft, a limiting block matched with the limiting groove is arranged in the centre hole of the belt wheel, and the limiting block is fixed to the rotary shaft through a fixing piece. The belt pulley has the advantages that the dot protrusions are arranged on the belt wheel, so that the belt pulley improves the force of friction between the beltand the belt wheel, because dots are not big, does not affect the effect of skidding to buffer in case of emergency so as not to damage the belt, can ensure the force of friction of the normal working; the cooling holes and a reinforce structure can ensure the belt pulley has enough rigidity and strength during cooling; and the belt wheel can be exactly fixed to the rotary shaft through the limiting block and the limiting groove.

Description

technical field [0001] The invention relates to a belt pulley and belongs to the technical field of transmission equipment. Background technique [0002] Now many mechanical devices are applied to the transmission device, and the transmission device generally uses the belt pulley transmission, which is relatively simple. Compared with the gear transmission, the belt pulley transmission cost is lower, and the general belt pulley transmission consists of a pulley, a rotating shaft, and a key. The pulley is an iron pulley, and there is a hole in the middle of the pulley that matches the rotating shaft. The friction between the belt and the pulley moves, but the pulley and the belt may slip when the friction is not enough or the speed is too fast, and Heat will be generated during fast rotation, and the pulleys in the prior art are not easy to dissipate heat, and the fixation between the pulley and the rotating shaft is usually unbalanced and unstable. Contents of the inventio...

AI Technical Summary

Problems solved by technology

[0002] Now many mechanical devices are applied to the transmission device, and the transmission device generally uses the belt pulley transmission, which is relatively simple. Compared with the gear transmission, the belt pulley transmission cost is lower, and the general belt pulley transmission consists of a pulley, a rotating shaft, and a key. The pulley is an iron pulley, and there is a hole in the middle of the pulley that matches the rotating shaft. The friction between the belt and the pulley moves, but the pulley and the belt may slip when the friction is not enough or the speed is too fast, and Heat is generated during rapid rotation, the pulleys of the prior art are not prone to dissipate heat, and the fixation between the pulley and the rotating shaft is often unbalanced and unstable

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