Automatic vibration method and device for hydraulic drilling machine

An automatic vibration device for a hydraulic drilling machine with working parts comprising a boom, an arm and a bucket, said device comprising:

• a working mode switch for selecting a vibration signal for the at least one working part selected from the boom, the arm and the bucket from a memory according to an operation form;
• a vibration mode switch for selecting an amplitude and a frequency of the selected vibration signal from the memory according to the operation form;
• and
• an automatic vibration mode switch for outputting the vibration signal, selected by the working mode switch and the vibration mode switch, to an electronic hydraulic valve of an actuator of the working part.

A method for operating a hydraulic drilling machine having a boom, an arm and a bucket as working parts, said method comprising:

• selecting a vibration signal for at least one of said working parts from a memory according to an operation form;
• selecting an amplitude and a frequency for the thus selected vibration signal from said memory according to said operation form;
• establishing an output signal responsive to the thus selected vibration signal having the thus selected amplitude and frequency;
• and
• controlling an actuator for said at least one of said working parts responsive to said output signal to thereby vibrate said at least one of said working parts.

A control system for use with a hydraulic drilling machine having a boom, an arm and a bucket as working parts, wherein each of said working parts has at least one hydraulic cylinder for actuating the respective working part, said control system comprising:

• a controller for producing an output signal, said controller having a memory for storing vibration signals for each of said working parts according to an operation form and for storing amplitudes and frequencies for each of said vibration signals according to said operation form;
• a work mode switch connected to said controller for selecting at least one of said working parts to be vibrated;
• a vibration mode switch connected to said controller for selecting an amplitude and a frequency;
• wherein said controller selects from said memory a stored vibration signal for the working part selected by said work mode switch and selects from said memory an amplitude and a frequency in response to the selection indicated by said vibration mode switch and establishes said output signal in response to the thus selected stored vibration signal and the thus selected amplitude and frequency;
• and
• means for applying said output signal to at least one actuator for the working part selected by said work mode switch, to thereby effect vibration of the thus selected working part.