Torque-adjustable multiplier

Abstract

The invention discloses a torque-adjustable multiplier. The torque-adjustable multiplier is provided with a reverse torque limit rod and also provided with two monomer torque multipliers, namely an active monomer multiplier and a driven monomer multiplier respectively, wherein the output shaft of the active monomer multiplier and the driven monomer multiplier are coaxially connected with each other in series through a shaft-shaft type torque-adjustable limiter; and the inner gear rings of the active monomer multiplier and the driven monomer multiplier are fixedly connected with more than one connecting plate respectively, wherein one connecting plate is fixedly connected with the reverse torque limit rod. The range of the ratio of the torque input to the torque output of the multiplier of the invention is greater than a conventional monomer multiplier, wherein the ratio can be adjusted freely according to design requirements; and the multiplier has the characteristics of prolonged service life, convenient use, safety and rapidness.

Description

technical field [0001] The invention relates to an adjustable torque multiplier, in particular, it is suitable as a bolt pre-tightening tool used as an anchor net supporting roadway in coal mines. Background technique [0002] Bolt-net support is a mature technology widely popularized and applied in coal mine roadway support at present. The key to the quality of bolt-net support is whether the bolt pre-tightening force meets the design requirements, so the role of bolt pre-tightening tools is particularly important. From the perspective of the current domestic coal mining industry, the development of bolt pretensioning tools is relatively lagging behind. Although there are a wide variety of multipliers or hydraulic wrenches and other related products, they all have limitations. The mechanical multiplier currently used has no torque value adjustment function; although the hydraulic wrench used has the torque value adjustment function, the safety regulations of the coal mine d...

AI Technical Summary

Problems solved by technology

From the perspective of the current domestic coal mining industry, the development of bolt pretensioning tools is relatively lagging behind. Although there are a wide variety of multipliers or hydraulic wrenches and other related products, they all have limitations.

The mechanical multiplier currently used has no torque value adjustment function; although the hydraulic wrench used has the torque value adjustment function, the safety regulations of the coal mine do not allow the power to be drawn from the roadheader in the tunneling face, and a special power system must be equipped, resulting in confusion

Neither of them can fully meet the special use requirements of coal mine underground conditions

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