Linear actuator apparatus and actuating control method

A linear actuator apparatus that linearly reciprocate a load, comprising:

• a first linear actuator including a first mover capable of linearly reciprocating in a first direction and a second direction, the first mover being connected to the load;
• a second linear actuator including a second mover capable of linearly reciprocating in the first direction and the second direction, the second mover being equipped with an accumulator;
• and
• a connecting unit that connects the first mover and the second mover so as to be able to move relative to each other linearly in the first direction and the second direction,
• wherein the shift of the first mover is larger than that of the second mover,
• the accumulator includes
• a first accumulator having a structure such that it accumulates energy by the shift of the second mover in the first direction due to the operation of the second linear actuator, and shifts the second mover in the second direction by discharging the energy accumulated by the operation of the second linear actuator;
• and
• a second accumulator having a structure such that it accumulates energy by the shift of the second mover in the second direction due to the operation of the second linear actuator, and shifts the second mover in the first direction by discharging the energy accumulated by the operation of the second linear actuator, and
• the first mover and the second mover respectively include
• a first abutting surface that abuts against each other when the second mover shifts in the second direction due to the discharge of energy by the first accumulator, to transmit the energy discharged from the first accumulator to the load;
• and
• a second abutting surface that abuts against each other when the second mover shifts in the first direction due to the discharge of energy by the second accumulator, to transmit the energy discharged from the second accumulator to the load.

An actuating control method of the linear actuator apparatus that linearly reciprocate a load, the linear actuator apparatus having

• a first linear actuator including a first mover capable of linearly reciprocating in a first direction and a second direction, the first mover being connected to the load;
• a second linear actuator including a second mover capable of linearly reciprocating in the first direction and the second direction, the second mover being equipped with an accumulator;
• and
• a connecting unit that connects the first mover and the second mover so as to be able to move relative to each other linearly in the first direction and the second direction,
• wherein the shift of the first mover is larger than that of the second mover,
• the accumulator has a structure such that the accumulator accumulates energy by the shift of the second mover in one of the first direction and the second direction, and shifts the second mover in other one of the first direction and the second direction by discharging the accumulated energy, and
• the first mover and the second mover have an abutting surface, respectively, which abuts against each other when the accumulator accumulates or discharges energy, to thereby transmit energy to each other via the accumulator,
• the method comprising, at the time of startup, actuating the second linear actuator to shift the second mover in one of the first direction and the second direction and actuating the first linear actuator to shift the first mover in the same direction in which the second linear actuator is actuated.

An actuating control method of the linear actuator apparatus that linearly reciprocate a load, the linear actuator apparatus having

• a first linear actuator including a first mover capable of linearly reciprocating in a first direction and a second direction, the first mover being connected to the load;
• a second linear actuator including a second mover capable of linearly reciprocating in the first direction and the second direction, the second mover being equipped with an accumulator;
• and
• a connecting unit that connects the first mover and the second mover so as to be able to move relative to each other linearly in the first direction and the second direction,
• wherein the shift of the first mover is larger than that of the second mover,
• the accumulator includes
• a first accumulator having a structure such that it accumulates energy by the shift of the second mover in the first direction due to the operation of the second linear actuator, and shifts the second mover in the second direction by discharging the energy accumulated by the operation of the second linear actuator;
• and
• a second accumulator having a structure such that it accumulates energy by the shift of the second mover in the second direction due to the operation of the second linear actuator, and shifts the second mover in the first direction by discharging the energy accumulated by the operation of the second linear actuator, and
• the first mover and the second mover respectively include
• a first abutting surface that abuts against each other when the second mover shifts in the second direction due to the discharge of energy by the first accumulator, to transmit the energy discharged from the first accumulator to the load;
• and
• a second abutting surface that abuts against each other when the second mover shifts in the first direction due to the discharge of energy by the second accumulator, to transmit the energy discharged from the second accumulator to the load,
• the method comprising, at the time of startup, actuating the second linear actuator to shift the second mover in one of the first direction and the second direction and actuating the first linear actuator to shift the first mover in the same direction in which the second linear actuator is actuated.

An actuating control method of the linear actuator apparatus that linearly reciprocate a load, the linear actuator apparatus having

• a first linear actuator including a first mover capable of linearly reciprocating in a first direction and a second direction, the first mover being connected to the load;
• a second linear actuator including a second mover capable of linearly reciprocating in the first direction and the second direction, the second mover being equipped with an accumulator;
• and
• a connecting unit that connects the first mover and the second mover so as to be able to move relative to each other linearly in the first direction and the second direction,
• wherein the shift of the first mover is larger than that of the second mover,
• the accumulator has a structure such that the accumulator accumulates energy by the shift of the second mover in one of the first direction and the second direction, and shifts the second mover in other one of the first direction and the second direction by discharging the accumulated energy, and
• the first mover and the second mover have an abutting surface, respectively, which abuts against each other when the accumulator accumulates or discharges energy, to thereby transmit energy to each other via the accumulator,
• the method comprising damping the shift of the first mover by the action of the accumulator for accumulating the energy and by controlling the actuation of the second linear actuator.

An actuating control method of the linear actuator apparatus that linearly reciprocate a load, the linear actuator apparatus having

• a first linear actuator including a first mover capable of linearly reciprocating in a first direction and a second direction, the first mover being connected to the load;
• a second linear actuator including a second mover capable of linearly reciprocating in the first direction and the second direction, the second mover being equipped with an accumulator;
• and
• a connecting unit that connects the first mover and the second mover so as to be able to move relative to each other linearly in the first direction and the second direction,
• wherein the shift of the first mover is larger than that of the second mover,
• the accumulator includes
• a first accumulator having a structure such that it accumulates energy by the shift of the second mover in the first direction due to the operation of the second linear actuator, and shifts the second mover in the second direction by discharging the energy accumulated by the operation of the second linear actuator;
• and
• a second accumulator having a structure such that it accumulates energy by the shift of the second mover in the second direction due to the operation of the second linear actuator, and shifts the second mover in the first direction by discharging the energy accumulated by the operation of the second linear actuator, and
• the first mover and the second mover respectively include
• a first abutting surface that abuts against each other when the second mover shifts in the second direction due to the discharge of energy by the first accumulator, to transmit the energy discharged from the first accumulator to the load;
• and
• a second abutting surface that abuts against each other when the second mover shifts in the first direction due to the discharge of energy by the second accumulator, to transmit the energy discharged from the second accumulator to the load,
• the method comprising damping the shift of the first mover by the action of the accumulator for accumulating the energy and by controlling the actuation of the second linear actuator.