Lubricating oil collecting filter of speed reducer

The utility model relates to a lubricating oil collecting filter of a speed reducer, which comprises a slope-shaped bottom shell, the interior of the slope-shaped bottom shell is in a funnel shape, acollecting pipe is arranged in the center of the slope-shaped bottom shell, a first filter is arranged at the lower part of the collecting pipe, a sliding sleeve is arranged in the first filter and isin sliding fit with the collecting pipe, and a filtering cavity is formed in the first filter; a filter element is arranged in the middle of the filter cavity, the sliding sleeve is inserted into a center hole of the filter element, an oil tank is arranged below the filter cavity and communicated with the filter cavity through a pipeline, an overflow filter is arranged between one side of the oiltank and the slope bottom shell, and an overflow pipe is arranged in the middle of the slope bottom shell and communicated with the overflow filter and the oil tank through pipelines. Lubricating oilcan be collected through th