Novel rotary device used on hydraulic rock drill

Abstract

The invention discloses a novel rotary device used on a hydraulic rock drill. The rotary device comprises a hydraulic rock drill outer cover, wherein a bit shank sleeve for fixedly installing a bit shank and a piston is arranged in the hydraulic rock drill outer cover; a hydraulic motor is fixedly arranged at the outer part of the hydraulic rock drill outer cover; and the hydraulic motor drives the bit shank sleeve to rotate through a three-stage transmission device. The independent rotary device is used; through twice speed reduction by the device, the output torque required by the work of the hydraulic rock drill is realized; meanwhile, the gear transmission and the belt transmission are used; the transmission efficiency is improved; the work is reliable; the transmission is stable; andthe impact and the vibration on a drill body during the piston impact can be buffered.

Description

technical field [0001] The invention relates to a rotary function of a hydraulic rock drill, in particular to a rotary device for a new hydraulic rock drill used in mining, highway, railway, water conservancy, and tunnel construction projects, belonging to the field of engineering machinery. Background technique [0002] At present, in my country's mining, high-speed rail, subway tunnels, and water conservancy construction, air-leg pneumatic rock drills are widely used, with an annual demand of more than 100,000 units and more than 350,000 employees. Pneumatic rock drills have a history of more than 150 years of development and application. However, except for machine tool structure, material and other improvements, the energy utilization rate has not been substantially improved, and problems such as large vibration and high noise have not been solved. [0003] The hydraulic rock drills put into the market in the 1970s used medium and high-pressure hydraulic oil as the energ...

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Problems solved by technology

[0004] On the one hand, the use of a large number of air-leg pneumatic rock drills consumes a lot of energy and increases the production cost of mines. On the other hand, the noise exceeds 125 dB(A), strong vibration and a large amount of oil pollution, causing a large number of employees to suffer from deafness, Occupational diseases such as hand disease seriously threaten the physical and mental health of miners

[0005] At present, the rotary structure of the pneumatic rock drill adopts an internal rotary structure. The structure is that the compressed air pushes the valve group to change direction through the inner hole of the shell to make the piston stroke. When the piston returns, it drives the rotary mechanism to rotate together with the drill rod and the drill bit; Only when the piston returns, it will drive the shank to rotate, which has large vibration and high noise, and because the working transmission medium is compressed air, it is easy to generate oil mist in the working environment when it is discharged directly to the outside of the rock drill.

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