A tightening device for round nuts

Abstract

The invention discloses a round nut tightening device. The round nut tightening device comprises an input mechanism and a tightening mechanism. The tightening mechanism comprises a second planetary gear, a key chuck and a claw chuck; the second planetary gear comprises a second sun wheel, an inner tooth ring and a second planetary gear; the second sun wheel and the inner tooth ring are both engaged with the second planetary gear; the key chuck and a gear shaft of the second planetary gear are fixed relatively; the inner tooth ring and the claw chuck are fixed relatively; the output of the input mechanism is in driving connection with the second sun wheel; the key chuck, the claw chuck and the second sun wheel are all coaxially arranged and can rotate relative to one another. According to the round nut tightening device, the second planetary gear is used for transmission of tightening torque, and the output torque is changed; and smaller torque can be input for obtaining larger output torque, and the effective tightening of a round nut with a large torque requirement on the condition of smaller torque input can be achieved.

Description

technical field [0001] The invention relates to the field of machinery, in particular to a tightening device for round nuts. Background technique [0002] Yaw and pitch reducers are widely used in the field of wind power due to their excellent structural characteristics. A pair of axially arranged tapered roller bearings are installed in the lower body of the wind power yaw and pitch reducer to support the open gear. The open gear bears alternating loads during actual use, so the tapered roller bearings bear A certain radial load and axial load. A round nut and a stop washer are arranged on the axial end surface of one of the tapered roller bearings, and the round nut is fixed on the open gear shaft by a specified torque to realize the axial positioning of the tapered roller bearing. Under normal circumstances, the tightening torque of this round nut is up to 4000Nm. In order to ensure reliable installation, a professional torque wrench is used for tightening, but this kin...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a round nut tightening device, which is especially suitable for the installation and tightening of tapered roller bearings for axially positioning round nuts for open gears of wind power yaw and pitch reducers. It solves the shortcomings of lack of tightening device and insufficient universality of torque wrench in the prior art

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