Variable-volume bucket and excavator

The utility model provides a variable-volume bucket and an excavator. The variable-volume bucket comprises a first bucket body and a second bucket body, and the second bucket body is telescopically arranged in a preset track of the first bucket body. The second bucket is driven by the driving device to do linear reciprocating motion along the preset track of the first bucket, so that the second bucket is telescopic relative to the first bucket, the total capacity of the bucket is changed, the problem that the bucket needs to be replaced in different working environments can be solved, the costis saved, and the bucket is more convenient to use. 本实用新型提供了一种可变容积铲斗及挖掘机。可变容积铲斗包括第一铲斗和第二铲斗，其中，所述第二铲斗可伸缩地设置于所述第一铲斗的预设轨道内。本实用新型通过驱动装置驱动第二铲斗沿第一铲斗的预设轨道的直线往复运动来实现第二铲斗相对于第一铲斗的伸缩，从而来改变铲斗的总体容量，能够解决在不同工作环境需要更换铲斗的问题，节省了成本，且更方便。