Planetary gearbox for hydraulic and pneumatic power tong

Abstract

The invention discloses a planetary gearbox for a hydraulic and pneumatic power tong. The planetary gearbox for the hydraulic and pneumatic power tong comprises a box body assembly, an input shaft, an output shaft, a first planetary gear train, a second planetary gear train, a connecting frame, a low-gear clutch and a high-gear clutch, wherein the input shaft, the output shaft, the first planetary gear train, the second planetary gear train, the connecting frame, the low-gear clutch and the high-gear clutch are installed on the box body assembly; the box body assembly comprises an upper end cover, a main box body and a lower end cover which are fixedly connected; the main box body is provided with a circle of annular protrusion and a radial grease injection hole; the annular protrusion is located in the middle of the inner side wall of the main box body; the grease injection hole comprises a grease injection end and a grease output end; and the grease output end is located in the middle of the inner side wall of the annular protrusion. By adopting grease lubrication, the gearbox has higher bearing capacity and better damping and shock absorption capacity. Meanwhile, the lubricating grease can form a grease ring with a certain sealing effect, so that the use in a humid and dusty environment of petroleum drilling is facilitated; and therefore, it is guaranteed that the dry pneumatic friction clutch can be normally used in severe working conditions of petroleum drilling.

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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