Single-action type variable length connecting rod and crank-connecting rod transmission mechanism

Abstract

The invention relates to a single-action type variable length connecting rod and a crank-connecting rod transmission mechanism, the single-action type variable length connecting rod comprises an inner connecting rod and an outer connecting rod, which are nested together and in sliding fit and connection, and the single-action type variable length connecting rod is characterized in that a guide groove is formed on the outer connecting rod and a cushion block which is in sliding fit with the guide groove is arranged in the guide groove; connecting plates for articulating the inner connecting rod and the cushion block together are respectively arranged on the two sides of the inner connecting rod and the cushion block; a guide cylinder is mounted on the outer connecting rod, a guide plate ofthe guide cylinder is fixed on the outer connecting rod through a screw, a guide hole arranged on the wall of the guide cylinder is in sliding fit with a guide short shaft on the guide plate, and a piston rod of the guide cylinder is fixed with the cushion block; a short stroke cylinder is mounted below the guide cylinder which is positioned on the outer connecting rod, and the connecting plates are used for connecting a cylinder body of the guide cylinder with the piston rod of the short stroke cylinder so as to enable the regulation of the length of the connecting rod to be more convenient and faster and enable the electric control to be easier; and the length of the variable length connecting rod can be adjusted in three positions, namely the initial position, the middle position and the hitting position, so that the variable connecting rod in the structure can be applied more widely.

Description

technical field [0001] The invention relates to a numerical control turret punching machine, in particular to a single-acting variable-length connecting rod and crank connecting rod transmission mechanism. Background technique [0002] The CNC turret punch press is the key equipment for sheet metal stamping. According to the main transmission mode, it can be divided into mechanical type, hydraulic type and servo main transmission type. Among them, the mechanical type and the servo main transmission type can use the crank-link mechanism to convert the rotary motion of the crankshaft driven by the motor into the reciprocating linear motion of the connecting rod. [0003] The servo main transmission mechanism sets the connecting rods in the traditional crank-link transmission mechanism as embedded and telescopic inner and outer connecting rods, which are respectively rigidly connected with the lower support and the upper support. The space is connected by a lifting cylinder; a...

AI Technical Summary

Problems solved by technology

In the actual electrical control process, in order to ensure that the two sets of cylinders are in place, a relatively long time needs to be set aside, which will prolong the overall control time when accumulated; at the same time, it is necessary to control the movements of the four cylinders, and the electrical control is complicated, which is not conducive to installation and maintenance. maintain

Moreover, this kind of mechanism composed of lifting cylinder, translation cylinder, and inner and outer connecting rods can only realize two positions, the highest position and the lowest position, and cannot provide a stable intermediate position between the highest position and the lowest position.

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