A shear pin coupling overload protection device

Abstract

The invention relates to an overload protection device for a shear pin coupling, which comprises a flange base that is internally provided with a multistep cavity structure, wherein a transmission shaft for accommodating a multistep shaft is matched in the flange base; a minor diameter end of the transmission shaft is connected with a driving chain wheel; a major diameter end of the transmission shaft is connected with an outer sleeve; at least a part of the outer sleeve is positioned between the major diameter end of the transmission shaft and a major diameter end of the flange base; a shear pin is mounted on the outer sleeve; a key groove is formed at the major diameter end of the transmission shaft; and at least a part of the shear pin is positioned in the key groove in a fit manner. The overload protection device is simple in structure and convenient to maintain, and operates stably. When an RTS (Rod Transfer System) cigarette tray unloading cache device is overloaded, the shear pin is broken, the power of a motor and the RTS cigarette tray unloading cache device is cut off, the RTS cigarette tray unloading cache device is protected, overload protection requirements are met, the shear pin can be replaced without dismounting spare parts of the RTS cigarette tray unloading cache device, and the maintenance time of equipment is shortened greatly.

Description

technical field [0001] The invention relates to a power transmission device, in particular to an overload protection device for a shear pin coupling. Background technique [0002] The COMFLEX-ML crimping and packaging auxiliary connection system in the prior art is mainly composed of three parts: RTS cigarette conveying system, HCF tray loading machine and MAGOMAT tray unloading machine. In order to temporarily balance the difference in production quantity between the cigarette making machine and the packaging machine during the turning over of the cigarette tray by the MAGOMAT unloading machine, a new cigarette unloading buffer device is added to the RTS cigarette conveying system. However, during use, the inventors found that the RTS cigarette unloading buffer device lacks the defect of a power transmission overload protection device, which causes a series of problems such as long equipment downtime and high maintenance costs. [0003] see figure 1 , when the motor 1 sta...

AI Technical Summary

Problems solved by technology

[0004] The motor directly transmits power to the drive sprocket through the transmission shaft. When the cigarette unloading cache device is overloaded, due to the lack of overload protection device, the transmission between the motor and the drive sprocket cannot be cut off until the chain in the cache device breaks and the motor It is only possible to disengage from the transmission of the buffer device, which can easily cause chain breakage, deformation of the skateboard, bending of the transmission rod, damage to the sensor, etc.

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