The present disclosure relates to a device for fastening a lockbolt, the device comprising: a lockbolt gun including a body unit having a grip therein for pulling the lockbolt and a gripping unit protruding from a lower portion of the body unit and having an operation switch installed on the outside, wherein a hydraulic supply flow path for supplying hydraulic pressure for driving the grip, a hydraulic discharge flow path for discharging hydraulic pressure supplied to the grip, and an air supply flow path for supplying pneumatic pressure to the operation switch are installed in the gripping unit, and a discharge hole is formed outside the gripping unit to discharge air from the air supply flow path when the operation switch is operated; a driving force supply unit having a hydraulic supply pump that supplies hydraulic pressure to the hydraulic supply flow path, a hydraulic recovery pump that recovers hydraulic pressure discharged from the hydraulic discharge flow path, and an oil tank that supplies oil to the hydraulic supply pump and recovers oil from the hydraulic recovery pump; an operating unit having a first solenoid valve connected to the hydraulic supply pump, the hydraulic recovery pump, and the air supply flow path, an air supply unit that supplies air to the first solenoid valve, and an air pressure regulator installed between the first solenoid valve and the air supply unit to regulate pneumatic pressure supplied to the first solenoid valve; a housing accommodating the driving force supply unit and the operating unit; and a control unit for controlling the hydraulic supply pump and the hydraulic recovery pump to operate so that the pneumatic pressure is supplied from the first solenoid valve to the hydraulic supply pump and the hydraulic recovery pump when an operating signal is inputted from the operation switch.

The present disclosure relates to a device for fastening a lockbolt, the device comprising: a lockbolt gun including a body unit having a grip therein for pulling the lockbolt and a gripping unit protruding from a lower portion of the body unit and having an operation switch installed on the outside, wherein a hydraulic supply flow path for supplying hydraulic pressure for driving the grip, a hydraulic discharge flow path for discharging hydraulic pressure supplied to the grip, and an air supply flow path for supplying pneumatic pressure to the operation switch are installed in the gripping unit, and a discharge hole is formed outside the gripping unit to discharge air from the air supply flow path when the operation switch is operated; a driving force supply unit having a hydraulic supply pump that supplies hydraulic pressure to the hydraulic supply flow path, a hydraulic recovery pump that recovers hydraulic pressure discharged from the hydraulic discharge flow path, and an oil tank that supplies oil to the hydraulic supply pump and recovers oil from the hydraulic recovery pump; an operating unit having a first solenoid valve connected to the hydraulic supply pump, the hydraulic recovery pump, and the air supply flow path, an air supply unit that supplies air to the first solenoid valve, and an air pressure regulator installed between the first solenoid valve and the air supply unit to regulate pneumatic pressure supplied to the first solenoid valve; a housing accommodating the driving force supply unit and the operating unit; and a control unit for controlling the hydraulic supply pump and the hydraulic recovery pump to operate so that the pneumatic pressure is supplied from the first solenoid valve to the hydraulic supply pump and the hydraulic recovery pump when an operating signal is inputted from the operation switch.

A fastener application device comprising an hydraulically-operated tool head held by an operator and having an actuator trigger, a base structure having an air-operated power cylinder operatively attached to an hydraulic cylinder to supply hydraulic pressure to the tool head in response to operation of the actuator trigger. The tool head and base structure are connected only by air and oil lines that are long enough to allow the base structure to be supported on, for example, a workbench, requiring the tool operator to support only the weight of the tool head during a fastener installation sequence.

A fastener application device comprising an hydraulically-operated tool head held by an operator and having an actuator trigger, a base structure having an air-operated power cylinder operatively attached to an hydraulic cylinder to supply hydraulic pressure to the tool head in response to operation of the actuator trigger. The tool head and base structure are connected only by air and oil lines that are long enough to allow the base structure to be supported on, for example, a workbench, requiring the tool operator to support only the weight of the tool head during a fastener installation sequence.

A rivet gun includes a gun body and a spear detachably connected. The gun body has an axial negative pressure air chamber and an axial hydraulic chamber intercommunicating for gas pressure. The spear includes a connecting chamber communicating with the hydraulic chamber and a gun nozzle. A jaw chamber operating for nail-clamping purposes is adjacent to the gun nozzle. The hydraulic chamber has a piston and an elastic member attached to the piston, other end of the elastic member connecting to the negative pressure air chamber. The piston is coupled to a rod, the rod bears on the jaw chamber to move along the axis of the connecting chamber and thereby clamp on or release a riveting nail.

A rivet gun includes a gun body and a spear detachably connected. The gun body has an axial negative pressure air chamber and an axial hydraulic chamber intercommunicating for gas pressure. The spear includes a connecting chamber communicating with the hydraulic chamber and a gun nozzle. A jaw chamber operating for nail-clamping purposes is adjacent to the gun nozzle. The hydraulic chamber has a piston and an elastic member attached to the piston, other end of the elastic member connecting to the negative pressure air chamber. The piston is coupled to a rod, the rod bears on the jaw chamber to move along the axis of the connecting chamber and thereby clamp on or release a riveting nail.

A pressure-limiting unit for a pressure booster for driving hydraulic tools. The unit includes a pneumatic unit that is driven by gas or air pressure, a hydraulic unit connected to the pneumatic unit and having a hydraulic port for connecting the hydraulic tool to the hydraulic unit in a fluid-tight manner and a pressure-limiting valve for adjusting the hydraulic pressure. The unit includes a closing element pushed against a valve seat by a spring element and having a displaceable adjusting element for adjusting the spring force of the spring element. To provide a pressure-limiting unit and a pressure booster for driving hydraulic tools with a pressure-limiting unit, which offer the possibility of making a precise adjustment of the hydraulic pressure in a simple way, the pressure-limiting unit includes a position detection unit connected to the adjusting element to detect the axial position of the adjusting element, an evaluation unit for determining the set hydraulic pressure as a function of the axial position, and an output unit for displaying the set hydraulic pressure.

A pressure-limiting unit for a pressure booster for driving hydraulic tools. The unit includes a pneumatic unit that is driven by gas or air pressure, a hydraulic unit connected to the pneumatic unit and having a hydraulic port for connecting the hydraulic tool to the hydraulic unit in a fluid-tight manner and a pressure-limiting valve for adjusting the hydraulic pressure. The unit includes a closing element pushed against a valve seat by a spring element and having a displaceable adjusting element for adjusting the spring force of the spring element. To provide a pressure-limiting unit and a pressure booster for driving hydraulic tools with a pressure-limiting unit, which offer the possibility of making a precise adjustment of the hydraulic pressure in a simple way, the pressure-limiting unit includes a position detection unit connected to the adjusting element to detect the axial position of the adjusting element, an evaluation unit for determining the set hydraulic pressure as a function of the axial position, and an output unit for displaying the set hydraulic pressure.

A pneumatic unit for a hydropneumatic pressure booster has a system line that leads from a compressed air inlet to a compressed air outlet. A bypass line runs parallel to the system line and it is connected to the system line via first and second compressed air switches. A compressed air reservoir is connected in the bypass line, and a pressure intensifier is connected in the region between the first compressed air switch and the compressed air reservoir. The pneumatic unit makes available to the pressure booster a sufficiently high pneumatic pressure for carrying out at least one operational step of a connected hydraulic tool, even in the case of a pressure decrease or pressure failure in the supplying pneumatic line. For that purpose, the second compressed air switch is configured for switching the compressed air flow between the system line and the bypass line.

A rivet gun includes a gun body and a spear detachably connected. The gun body has an axial negative pressure air chamber and an axial hydraulic chamber intercommunicating for gas pressure. The spear includes a connecting chamber communicating with the hydraulic chamber and a gun nozzle. A jaw chamber operating for nail-clamping purposes is adjacent to the gun nozzle. The hydraulic chamber has a piston and an elastic member attached to the piston, other end of the elastic member connecting to the negative pressure air chamber. The piston is coupled to a rod, the rod bears on the jaw chamber to move along the axis of the connecting chamber and thereby clamp on or release a riveting nail.