Range of motion variable link mechanism for oxygen-acetylene cutting machine

Abstract

A range of motion variable link mechanism for an oxygen-acetylene cutting machine comprises a base 1, a big arm lifting mechanism, a holder connecting rod pitching mechanism, a holder 27, a burning torch 28, a servo drive device, a first locking device 5 and a second locking device 12. The big arm lifting mechanism comprises a big arm 8, a fourth connecting rod 3 and a fifth connecting rod 6. The holder connecting rod pitching mechanism comprises a drive rod 16, a first connecting rod 18, a second connecting rod 21 and a third connecting rod 11. The first locking device 5 is arranged on an eleventh revolute pair 4, the second locking device 12 is arranged on an eighth revolute pair 7, and the first locking device 5 and the second locking device 12 can carry out timely locking according to different working conditions of an oxygen-acetylene cutting mechanism. The servo drive device comprises a first servo motor connected with the drive rod 16 to drive the drive rod 16 to rotate. The first locking device 5 and the second locking device 12 adopt an electromagnetic manner to carry out locking. The range of motion variable link mechanism can achieve two freedom degrees of oxygen-acetylene cutting operation with only one drive rod, the using number of motors is reduced, and the manufacturing cost of the oxygen-acetylene cutting mechanism is reduced.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a variable activity link mechanism for a gas cutting blanking machine. Background technique [0002] At present, most of the general-purpose gas cutting cutting machines in the manufacturing industry are joint-type motor-driven manipulators with a series structure in the form of an open chain. Various actions of the manipulator. Since the driving motors of the joint-type manipulators with series structure in the form of open chain are installed at the joints, this structure has the following problems: the manipulator arm needs to carry the weight of the motor and meet the rigidity requirements, and the cross-sectional size of the arm needs to be made larger. This will increase the load on the drive motor, increase the moment of inertia of the arm, and lead to a decrease in the dynamic performance of the manipulator. At the same time, the drive motors are installed at the joint position, r...

AI Technical Summary

Problems solved by technology

Since the driving motors of the joint-type manipulators with series structure in the form of open chain are installed at the joints, this structure has the following problems: the manipulator arm needs to carry the weight of the motor and meet the rigidity requirements, and the cross-sectional size of the arm needs to be made larger. This will increase the load of the drive motor, increase the motion inertia of the arm, and lead to a decrease in the dynamic performance of the manipulator. At the same time, the drive motors are installed at the joint position, resulting in large cumulative errors, small load-carrying capacity, complex structure, and low modularity of the manipulator.

At present, there are few variable-degree-of-freedom mechanisms that can be applied to practical applications, and no variable-degree-of-freedom mechanisms that have been applied to gas cutting blanking machines have been seen.

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