Abstract: An intelligent contactor is provided which comprises a contactor body, and the contactor body is provided with a first conductive piece and a second conductive piece partially protruding out of the contactor body. A current splitter for measuring a current flowing through the first conductive piece and the second conductive piece is arranged inside the contactor body; an electromagnetic system for controlling one end of the current splitter and a circuit board for controlling the electromagnetic system. The other end of the current splitter is electrically connected to the second conductive piece. A partition plate is vertically and fixedly connected inside the contactor body, and the partition plate is used to partition the interior of the contactor body into a first accommodation chamber and a second accommodating chamber to address the problem of inability of a contactor in the prior arts to perform power cutoff for an over-current case.

Abstract: The present invention discloses an intelligent control system for a winch motor, comprising: a duplex switching relay; a contact end of the duplex switching relay comprises a first conductive sheet, a second conductive sheet, a third conductive sheet and a fourth conductive sheet, a winch motor, comprising an inner stator winding coil and an outer rotor motor; a running parameter collecting module, configured to collect electric current and running time length parameters of the winch motor in operation and/or a temperature parameter of the winch motor in operation; a controller, configured to control a conducted state of the duplex switching relay, and electrically connected to a coil control end of the duplex switching relay to protect the winch motor by cutting off power source in time when excess heat is generated after a long time of normal operation of the winch motor.

Abstract: An automatic resetting mechanism for a winch engaging-disengaging switch includes a winch bracket, a motor drive assembly, a gear box, a drive shaft, a planetary gear set, and an engaging-disengaging assembly. At least one gear ring locking portion is disposed circumferentially on an outer circumferential wall of a gear ring of the planetary gear set. The engaging-disengaging assembly includes an engaging-disengaging seat, an engaging-disengaging shaft, and an engaging-disengaging toggle sheet. The engaging-disengaging seat is fixed on the gear box. A positioning step is disposed on the engaging-disengaging seat. The engaging-disengaging shaft is penetrated into the engaging-disengaging seat. An engaging-disengaging pin is disposed on a sidewall of the engaging-disengaging shaft. The engaging-disengaging pin is abutted against the positioning step.

Abstract: A hydraulic jack is provided which comprises a piston cylinder, a piston rod, an oil passage switching valve and an internal cylinder. The oil passage switching valve is provided with an oil outlet; a one-way valve assembly preventing the backflow of the oil outlet passage is disposed between the first oil inlet passage and the oil outlet passage; a return oil inlet passage is disposed at the bottom of the piston head; a return oil chamber in communication with the return oil inlet passage is disposed inside the piston head; a return oil outlet passage communicating the return oil chamber and the piston cylinder oil storage chamber is disposed on the piston head; a one-way return oil assembly is mounted in the return oil chamber, thus the hydraulic oil does not enter the hydraulic area and finally the top plate will not rise continuously along with pressing, providing overload protection.

Abstract: The provided is an automatic resetting device of an engaging-disengaging winch. The automatic resetting device includes a winch bracket, a motor, a gear box, at least two planetary gear sets, a transmission shaft and a knob assembly. An elastic resetting assembly is disposed between the transmission shaft and the motor. A right end of the transmission shaft is connected at the rightmost planetary gear set. A one-way bearing is fixedly sleeved on a middle part of a right side plate in the rightmost planetary gear set, and a resetting drive piece is fixedly sleeved on the one-way bearing. At least one resetting protrusion is disposed circumferentially on the resetting drive piece. The resetting protrusions are axially and elastically connected to the resetting drive piece and have a tendency of protruding rightward along an axial direction.

Abstract: An intelligent contactor is provided which comprises a contactor body, and the contactor body is provided with a first conductive piece and a second conductive piece partially protruding out of the contactor body. A current splitter for measuring a current flowing through the first conductive piece and the second conductive piece is arranged inside the contactor body; an electromagnetic system for controlling one end of the current splitter and a circuit board for controlling the electromagnetic system. The other end of the current splitter is electrically connected to the second conductive piece. A partition plate is vertically and fixedly connected inside the contactor body, and the partition plate is used to partition the interior of the contactor body into a first accommodation chamber and a second accommodating chamber to address the problem of inability of a contactor in the prior arts to perform power cutoff for an over-current case.

Abstract: The present invention discloses an intelligent control system for a winch motor, comprising: a duplex switching relay; a contact end of the duplex switching relay comprises a first conductive sheet, a second conductive sheet, a third conductive sheet and a fourth conductive sheet, a winch motor, comprising an inner stator winding coil and an outer rotor motor; a running parameter collecting module, configured to collect electric current and running time length parameters of the winch motor in operation and/or a temperature parameter of the winch motor in operation; a controller, configured to control a conducted state of the duplex switching relay, and electrically connected to a coil control end of the duplex switching relay to protect the winch motor by cutting off power source in time when excess heat is generated after a long time of normal operation of the winch motor.

Abstract: A hydraulic jack is provided which comprises a piston cylinder, a piston rod, an oil passage switching valve and an internal cylinder. The oil passage switching valve is provided with an oil outlet; a one-way valve assembly preventing the backflow of the oil outlet passage is disposed between the first oil inlet passage and the oil outlet passage; a return oil inlet passage is disposed at the bottom of the piston head; a return oil chamber in communication with the return oil inlet passage is disposed inside the piston head; a return oil outlet passage communicating the return oil chamber and the piston cylinder oil storage chamber is disposed on the piston head; a one-way return oil assembly is mounted in the return oil chamber, thus the hydraulic oil does not enter the hydraulic area and finally the top plate will not rise continuously along with pressing, providing overload protection.

Abstract: The present disclosure discloses a Doherty power amplifier, including at least one carrier power amplifier and at least one peak power amplifier connected in parallel, each carrier power amplifier includes at least one carrier power amplifier unit connected in parallel for power combination, and each peak power amplifier includes at least one peak power amplifier unit connected in parallel for power combination, each of the carrier power amplifier unit and the peak power amplifier unit includes two power amplifier circuits connected in parallel for power combination, and each of the two power amplifier circuits includes a medium-low power amplifier transistor having saturation power less than or equal to a preset threshold. The present disclosure further discloses a power amplification method.

Abstract: Embodiments of the present disclosure disclose a drive for an electric clutch if a winch. The drive comprises a pusher block having a first end, a second end, and a transmission component arranged on a central portion of the pusher block to drive a transmission shaft; a first driving unit connected to the first end to drive the first end to reciprocate between a first position and a second position; and a second driving unit connected to the second end to drive the second end to reciprocate between a third position and a fourth position. The drive enables switching of the transmission shaft between a high speed mode, a low speed mode, and an idle mode. A winch including the drive is also disclosed.

Abstract: The present disclosure discloses an electric winch which comprises a motor having a motor housing, a first terminal, a second terminal and a third terminal, and an insulating cover plate having a mounting hole, a first inner bore column and a second inner bore column. A first through hole, a second through hole and a third through hole are provided on an outer edge of the motor housing. The embodiment allows pre-mounting of the terminals on the insulating cover plate before they are fixed to the motor housing and provides higher efficiency in the assembly process.