A planetary gearbox for hydraulic tongs

Abstract

The invention discloses a planetary gearbox for a hydraulic tong, comprising a box assembly, an input shaft, an output shaft, a first planetary gear train, a second planetary gear train and a connecting frame mounted on the box body assembly , low-speed gear clutch and high-speed gear clutch, the box assembly includes an upper end cover fixedly connected, a main box body and a lower end cover; the main box body is provided with a circle of annular protrusions and a radial grease injection hole, and the annular protrusions are located on the main In the middle of the inner wall of the box, the grease injection hole includes a grease injection end and a grease output end, and the grease output end is located in the middle of the inner wall of the annular protrusion; by adopting grease lubrication, the gearbox has a higher carrying capacity and better At the same time, the grease can form a grease ring with a certain sealing effect, which is conducive to the use in the humid and dusty environment of oil drilling; thus ensuring that the dry pneumatic friction clutch can be used in the harsh working conditions of oil drilling in normal use.

Description

technical field [0001] The invention relates to the technical field of gearboxes, in particular to a planetary gearbox used for hydraulic tongs. Background technique [0002] Oil drilling requires the use of liquid-pneumatic tongs in the production process. The hydraulic-pneumatic tongs are auxiliary proprietary equipment used to control drilling tool hook-up and breakout. The hydraulic-pneumatic tongs have the advantages of easy operation, safety, and labor saving, which greatly improves To reduce the working intensity, it is widely used in the make-up and break-out operations of a single drill pipe or column thread; the gearbox used in the existing hydraulic tongs adopts a pneumatic tire clutch, thereby meeting the demand for high torque of hydraulic tongs , but the use of a pneumatic tire clutch will increase the volume of the gearbox. At the same time, the pneumatic tire clutch wears quickly and needs to be replaced frequently, making installation and maintenance trouble...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, the purpose of the present invention is to overcome the deficiencies of the prior art and provide a planetary gearbox for hydraulic tongs, which uses a dry pneumatic friction clutch to solve the problem of large gearbox volume and fast wear of the pneumatic tire clutch. , frequent replacement, troublesome technical problems in installation and maintenance, and at the same time, it can ensure the normal use of the dry pneumatic friction clutch in the harsh working conditions of oil drilling

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