Reciprocating motion type chain tensioning mechanism for rock drill

Abstract

Disclosed is a reciprocating motion type chain tensioning mechanism for a rock drill. The reciprocating motion type chain tensioning mechanism for the rock drill is characterized in that the two ends of a chain are connected with the two ends of each extension spring respectively, and a driven chain wheel is fixed to a machine frame. The two ends of the chain are connected with the two ends of each extension spring through connecting mechanisms respectively. Each connecting mechanism comprises a pull rod, a nut, a connecting plate and pins. The two ends of the chain are fixedly connected with the pull rods, the pull rods are fixed to the connecting plates through the nuts, and the upper connecting plate and the lower connecting plates are connected with the extension springs through the pins. Compared with an existing reciprocating motion type chain tensioning mechanism for the rock drill, the reciprocating motion type chain tensioning mechanism for the rock drill has the structural advantages that compression springs with the large sizes and high rigidity are replaced by the extension springs with the small sizes and low rigidity; a floating type driven chain wheel is replaced by the fixed type driven chain wheel, and the working environment of the driven chain wheel is improved; and the tensioning structure is simple, and adjustment is convenient and saves labor.

Description

technical field [0001] The invention belongs to the technical field of manufacturing a chain tensioning system of rock drilling equipment, and in particular relates to a reciprocating chain tensioning mechanism. Background technique [0002] Advantages of the reciprocating chain tensioning mechanism: it can compensate the tension (the chain will become looser and looser during use, and it will be compensated by the pre-tightening force of the spring of the tensioning device, so that the tension of the chain can be maintained). Most of the reciprocating chain tensioning methods used in the field of rock drilling are as follows: figure 1 As shown, 1 is a frame, 2 is a chain, 4 is a driven sprocket, 13 is a spring pressing plate, 14 is a compression spring, 9 is a nut, and 15 is the main body of the adjustment mechanism. The whole sprocket mechanism is contained in a compression spring 14 On the top of the equipment, the nut 9 is used to adjust the tension of the chain. Althou...

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Problems solved by technology

[0002] Advantages of the reciprocating chain tensioning mechanism: it can compensate the tension (the chain will become looser and looser during use, and it will be compensated by the pre-tightening force of the spring of the tensioning device, so that the tension of the chain can be maintained). Most of the reciprocating chain tensioning methods used in the field of rock drilling are as follows: figure 1 As shown, 1 is a frame, 2 is a chain, 4 is a driven sprocket, 13 is a spring pressing plate, 14 is a compression spring, 9 is a nut, and 15 is the main body of the adjustment mechanism. The whole sprocket mechanism is contained in a compression spring 14 On the top of the equipment, the nut 9 is used to adjust the tension of the chain. Although the structure is simple, the compression spring must bear all the weight of the drilling tool, chain, sprocket and other parts transmitted from the driven sprocket to the main body of the adjustment mechanism and the work of the chain. The tension and pre-tightening force lead to large spring structure size and high stiffness, making it difficult to manufacture the spring. The height of the equipment is about 4 meters, which is very inconvenient to adjust, and it is not easy to adjust and control

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