37results about How to "Avoid job failure" patented technology

A learning diagnostic system for a working machine is capable of making a fault diagnosis of the working machine universally relative to various types of sensor information, and preventing a failure in the working machine by enabling a fault diagnosis even in a transient operating state that represents a transitional state between operating states.A state learning device 201 sorts inputted sensor data 101a into one under a steady operating state and one under a transient operating state, and generates, through learning, steady state data 102a and intermediate state data 103a, each including a permissible error. A state diagnostic device 202 uses the steady state data 102a to determine whether an operating state of the working machine related to the inputted sensor data is the steady operating state or the transient operating state, and make a fault determination in the steady operating state. The state diagnostic device 202 also uses the intermediate state data 103a to make a fault determination in the determined transient operating state. The intermediate state data 103a also includes intermediate point information.

The invention discloses a hinge damping buffer structure which comprises a connection arm, a hinge cup seat, a transmission arm assembly and an elastic assembly, wherein two ends of the transmission arm assembly are respectively connected with the connection arm and the hinge cup seat in a rotatable manner; the elastic assembly is arranged on the transmission arm assembly; the connection arm is hinged with the hinge cup seat through matching between the transmission arm assembly and the elastic assembly, to realize opening and closing of a hinge. The hinge damping buffer structure is characterized in that a damper is arranged on the connection arm in a sliding manner; the transmission arm assembly is hinged with a pushing element; a zigzag region is arranged on the pushing element and at least acts on one end of the damper when the hinge closes a travel; the damper slides on the connection arm and is compressed to generate damping buffer force; the zigzag region is at least separated from one end of the damper when the hinge opens a travel; the damper slides on the connection arm and is reset to the initial position. The hinge damping buffer structure has the characteristics of simple and reasonable structure, excellent performance, quickness in assembling, long service life, low manufacturing cost, easiness in production and implementation, safety and reliability, and is high in practicability.

A level shift circuit including a level conversion unit that converts an input signal having a signal level of a first voltage into a signal having a signal level of a second voltage that is higher than the first voltage. The level conversion unit includes first and second MOS transistors of a first conductivity type and third and fourth MOS transistors of a second conductivity type, which differs from the first conductivity type and of which switching is controlled in accordance with the input signal. The third and fourth MOS transistors include drains supplied with the second voltage via the first and second MOS transistors, respectively. A control unit, when detecting a decrease in the first voltage, controls a body bias of the third and fourth MOS transistors to decrease a threshold voltage of the third and fourth MOS transistors.

A damping buffer closing structure for a furniture hinge comprises a connecting arm, elastic pieces, a hinge cup seat, a damper, a transmission arm assembly and a poking assembly. The poking assembly is arranged on the transmission arm assembly. The damper is arranged on the connecting arm. The two ends of the transmission arm assembly are rotationally connected with the connecting arm and the hinge cup seat correspondingly. The connecting arm is hinged to the hinge cup seat to open and close the furniture hinge in a hinged manner through cooperation of the transmission arm assembly and the elastic pieces, and an included angle A is formed between the connecting arm and the hinge cup seat. The poking assembly comprises a poking element and an elastic poking element. The poking element is elastically and rotationally located to the transmission arm assembly through the elastic poking element. The damper is provided with an elastic damping element. The damper elastically stretches and contracts to slide on the connecting arm through the elastic damping element. By improving the structure, the damping buffer closing structure has the beneficial effects of being simple and reasonable in structure, excellent in performance, fast and convenient to assemble, long in service life, low in manufacturing cost, easy to produce, easy to implement, safe, reliable, high in practicability and the like.

The invention discloses a food residue and water separating unit. The food residue and water separating unit comprises an outer barrel (1) and a hollow shaft (2); the hollow shaft is arranged in the outer barrel (1), connected with a support through a bearing, and connected with the outer barrel through a bearing, and a material stopping disc (3) in interference fit with the hollow shaft is fixedly arranged at the position, close to one end and perpendicular to the axial direction of the hollow shaft, inside the hollow shaft; a plurality of discharging holes (4) are formed in the part, located in the outer barrel, of the side face of the hollow shaft, the side face of the outer barrel is in a hole plate shape, and a filtering net (5) in clearance fit with the outer barrel is arranged in the outer barrel; the hollow shaft is provided with a hollow shaft transmission wheel (6), and the outer barrel is provided with an outer barrel transmission wheel (7); and the food residue and water separating unit is further provided with a controller (10), a flow sensor (11) is arranged at the position, close to an opening in the upper end, of the hollow shaft, and a weight sensor (12) is arranged on the material stopping disc. The food residue and water separating unit has the beneficial effects that food waste can be automatically treated, power adjustment can be automatically carried out according to the waste amount, and therefore the aims that the energy saving effect is good, the residue and water separating effect is better, and separated residues are conveniently recycled are achieved.

The invention discloses a forklift mask lifting hydraulic system. The system comprises a working oil way, a main oil return way, at least one lifting oil cylinder and a reversing valve, wherein a rodless cavity of the lifting oil cylinder is connected with the working oil way, a rod cavity of the lifting oil cylinder is connected with the main oil return way through a pipe joint so as to enable the rod cavity and the pipe joint to be connected to form a low-pressure oil return way used for guiding oil liquid to flow back to the rod cavity, and the reversing valve selectively communicates withthe working oil way and the pipe joint. When a heavy object presses a piston rod of the lifting oil cylinder, the piston rod pushes the oil liquid in the rodless cavity to flow into the working oil path, due to the fact that the reversing valve can communicate with the working oil way and the pipe joint, the oil liquid flowing out of the working oil way is returned to the rod cavity and the main oil return way through the pipe joint, so that fluid friction is formed between the piston rod and a cylinder barrel, serious abrasion of the piston rod or the cylinder barrel is avoided, the working failure of the lifting oil cylinder is further avoided, so that the lifting oil cylinder can be stably telescopic, so that a fork works stably. The invention further discloses a forklift comprising theforklift mask hydraulic system.

The invention belongs to the switch technical field and discloses a lightning arrester-combined grounding switch and a method thereof. The lightning arrester-combined grounding switch includes a grounding switch main body, a zinc oxide lightning arrester, an electric operation mechanism and a motor shut-down control mechanism, wherein the electric operation mechanism includes a motor and a bevel gear drive mechanism. The lightning arrester-combined grounding switch of the invention has the advantages of simple, compact and reasonable structure, simple use method, suitability for being used under high current intensity, and excellent overall operating performance. The grounding switch is combined with the lightning arrester, so that the grounding switch can have the functions of the lightning arrester; when working under working voltage, the grounding switch is required to bear additional constant lightning impulse voltage, and the grounding switch main body cannot perform discharge or be grounded under the impact of the additional constant voltage, while, the lightning arrester will be converted into a conductive state from an insulated state, and performs disruptive discharge when additional lightning intrudes the switch or voltage is increased, and therefore, a certain lightning current or overvoltage can be led into the ground, and the grounding switch will not be impacted by the additional constant voltage, and the safety of related equipment can be well protected.

A damper opening and closing angle varying mechanism of a hinge comprises a blocking element, a connection element and a lever element which are in hinge fit with one another. A damper is arranged between the blocking element and the connection element. One end of the damper is rotationally arranged on the blocking element, and the other end of the damper abuts against the connection element. The connection element, the lever element and the damper are linked with one other relative to the blocking element when the hinge is opened or closed. When the hinge is closed by at least one certain angle, the lever element acts on the damper and drives the damper to slide on the connection element in a limited mode, the damper is compressed and generates damping force, and thus, damped closing of the hinge is achieved. Through the structure improvement, the damper opening and closing angle varying mechanism of the hinge has the characteristics that the structure is simple and reasonable, safety and reliability are achieved, production and implementation are easy, adjustment is fast, operation is convenient, the service life is long, practicability is high, and the opening and closing process is labor-saving, smooth, small in collision and low in noise.

The invention relates to the field of vehicle brake components and specifically relates to a novel brake disc. The brake disc comprises a brake friction portion made of gray cast iron and a hub jointportion made of ductile iron; the brake friction portion and the hub joint portion are both annular; the brake friction portion sleeves and is fixed to a peripheral side wall of the hub joint portion.The invention has simple structure and excellent heat dissipation performance and structural strength.

The invention discloses a hydraulic wheel anti-skid device capable of automatically stretching out and relates to the field of automobile antiskid devices. The hydraulic wheel anti-skid device comprises a hub. A tire is arranged on the outer side of the hub. Arch protrusions are evenly distributed on the two side faces of the tire. Through holes are punched in the middles of the arch protrusions in the radial direction of the tire. Fixing frames evenly distributed are fixedly connected with the inner side of the hub through screws. Limiting grooves are formed in the two ends of each fixing frame. Two annular hydraulic pipes are arranged in the positions, on the two sides of the hub, of the limiting grooves on the two sides respectively. The outer sides of the two hydraulic pipes are communicated with single-rod piston hydraulic cylinders evenly distributed in a radial shape in the radial direction of the tire, an antiskid supporting rod is installed at the top end of a working rod of each single-rod piston hydraulic cylinder, the other end of the antiskid supporting rod is in a conical shape, and the supporting rods and the through holes of the arch protrusions are connected in a sliding fit mode. The hydraulic wheel anti-skid device has the advantages that the antiskid supporting rods can stretch out to achieve the antiskid purpose through a control system in a vehicle, and the hydraulic wheel anti-skid device is convenient, fast and easy to operate.

A learning diagnostic system for a working machine is capable of making a fault diagnosis of the working machine universally relative to various types of sensor information, and preventing a failure in the working machine by enabling a fault diagnosis even in a transient operating state that represents a transitional state between operating states.A state learning device 201 sorts inputted sensor data 101a into one under a steady operating state and one under a transient operating state, and generates, through learning, steady state data 102a and intermediate state data 103a, each including a permissible error. A state diagnostic device 202 uses the steady state data 102a to determine whether an operating state of the working machine related to the inputted sensor data is the steady operating state or the transient operating state, and make a fault determination in the steady operating state. The state diagnostic device 202 also uses the intermediate state data 103a to make a fault determination in the determined transient operating state. The intermediate state data 103a also includes intermediate point information.

The invention discloses a dual-purpose unlocking and locking mechanism which comprises a frame (1), a manual unlocking assembly (2), a push rod (9) and an electromagnetic locking assembly (13). The frame (1) is provided with the manual unlocking assembly (2) and the electromagnetic locking assembly (13), and the electromagnetic locking assembly (13) is composed of an electromagnet (16) and a torsional spring (18). The dual-purpose unlocking and locking mechanism is characterized in that the manual unlocking assembly (2) comprises a spring sheet (3), a cover plate (4), a pull ring (6) and a pull plate (7), the cover plate (4) is arranged on the outer portion of the spring (5), the spring sheet (3) is arranged on the lower portion of the cover plate (4), the pull ring (6) and the pull plate (7) are in sliding connection, the pull plate (7) is arranged on damping rubber (8), the push rod (9) is arranged on a rotating shaft (11), and the push rod (9) is in sliding fit with an inner ring of an annular support (10). The dual-purpose unlocking and locking mechanism is small in structural unlocking force, and reliable in locking.

The invention belongs to the field of new energy and the technical field of distributed power generation, particularly relates to a control device and method for improving the stability of a photovoltaic virtual synchronous machine system with a small-capacity energy storage ratio, and mainly relates to photovoltaic dynamic characteristic detection and photovoltaic virtual synchronous machine design. The device comprises a photovoltaic power generation system, a small-capacity energy storage device, an inversion device and a virtual synchronous machine device with DC end additional control. The power output end of the photovoltaic power generation system is connected with the small-capacity energy storage device and the inversion end of the inversion device, and then is connected with a power grid through the LC filter circuit and the line impedance. According to the invention, the phenomenon that the inverter fails to work due to sudden drop of direct-current voltage can be avoided; the problem that output active power and reactive power are affected by line impedance in inverter networking or grid-connected operation is solved, the problem that the load or the external environment cannot be predicted and controlled is solved, and the situation that the inverter fails to invert and is off-grid due to the fact that the voltage of the photovoltaic power supply is dramatically reduced and cannot return to a stable working area is avoided.

The invention discloses a long-service small-sized electromagnetic relay. The long-service small-sized electromagnetic relay comprises a yoke iron, an armature, an elastic piece, an iron core assembly, a coil frame, a push rod and a base, wherein the iron core in a nesting structure penetrates through an iron core hole of the coil frame and is riveted to a vertical section of the yoke iron, the yoke iron and the armature are steadily combined by virtue of a ''reverse L-shaped'' elastic piece, the coil is electrified to work, the armature is actuated, an armature clamp block and an elastic piece baffle block push the tail of the push rod to drive a movable spring to work, and then a movable contact is in contact with static contact; when the yoke iron and the elastic piece are reset, a limiting rod of the push rod props against an insulation wall of the base, so that the situation that the relay is disabled due to a too-large counter force of the elastic piece is avoided; the coil frameis precisely mounted in the base through a positioning column, and a varnished wire between the coil and a terminal pin is always located on the top surface of a right base plate between two wire clamping bolts, so that the steady wiring is realized. The long-service small-sized electromagnetic relay is compact in structure, stable in performance and good in insulativity, the working failure caused due to over-large actuation voltage can be effectively avoided, the position is precise, and the automatic assembling is easily realized.

The invention discloses a single-sided pipe clamp, and belongs to the technical field of single-sided pipe clamps. The single-sided pipe clamp comprises a base and a pipe clamp body. A bolt is movablyconnected to an inner cavity of a bolt hole in an inserted mode, and a push block is movably arranged on the rear side of the bolt. A buffer device is arranged at the joint of the bolt and the push block, and inner cavities of clamping rod grooves are provided with clamping rods. Clamping holes matched with the clamping rods are formed in the bottoms of connecting rods. A sleeve enables the boltnot to drive the push block to move when the bolt is slightly loosened, and the tension of a return spring pushes the push block backwards to prevent the push block from moving forward; even if the push block moves forward a certain distance, the clamping rods do not move when the inclined plane on the push block is not attached to the inclined surfaces on baffle blocks; and the baffle blocks meshes with anti-slip teeth on the push block so that the accidental movement of the push block is effectively prevented. The single-sided pipe clamp effectively avoids the failure situation of pipeline clamping work by the pipe clamp due to the loosening of the bolt caused by mechanical vibration, thereby improving the safety.

The invention relates to a methanol fuel injector structure. The methanol fuel injector structure comprises a shell, a valve element, a retainer and a valve seat; a fuel flowing channel is defined bythe shell; the valve seat is arranged at the bottom end of the shell; a guide hole is formed in the middle position of the retainer; the retainer is arranged in the flowing channel; the outer side wall of the valve element is in sliding fit with the guide hole so as to divide the flow channel into a first channel and a second channel close to the valve seat; the second channel is used for introducing methanol; and the first channel is used for introducing compressed gas with the same pressure as methanol. According to the methanol fuel injector structure, through matching between the valve element and the guide hole of the retainer, the valve element moves up and down along with an excitation signal when a methanol fuel injector works, the guide hole plays an accurate guide role, methanolforms a film in a gap under the action of pressure, the air pressure in the first channel is as same as the pressure of the methanol, the methanol cannot enter the first channel, and therefore, the situation that the methanol enters the valve element to gradually form colloid to enable the valve element fails to work is avoided.

A damping buffer closing structure for a furniture hinge comprises a connecting arm, elastic pieces, a hinge cup seat, a damper, a transmission arm assembly and a poking assembly. The poking assembly is arranged on the transmission arm assembly. The damper is arranged on the connecting arm. The two ends of the transmission arm assembly are rotationally connected with the connecting arm and the hinge cup seat correspondingly. The connecting arm is hinged to the hinge cup seat to open and close the furniture hinge in a hinged manner through cooperation of the transmission arm assembly and the elastic pieces, and an included angle A is formed between the connecting arm and the hinge cup seat. The poking assembly comprises a poking element and an elastic poking element. The poking element is elastically and rotationally located to the transmission arm assembly through the elastic poking element. The damper is provided with an elastic damping element. The damper elastically stretches and contracts to slide on the connecting arm through the elastic damping element. By improving the structure, the damping buffer closing structure has the beneficial effects of being simple and reasonable in structure, excellent in performance, fast and convenient to assemble, long in service life, low in manufacturing cost, easy to produce, easy to implement, safe, reliable, high in practicability and the like.

The invention relates to the technical field of submersible pumps, and discloses an integrated submersible pump motor support which comprises a machine shell, and a first end cover and a second end cover which are fixed to the two ends of the machine shell respectively. A rotor is further arranged in the machine shell, the inner end of the rotor is rotationally connected with the inner side of the first end cover, the outer end of the rotor extends out of the second end cover, and an inner cavity for installing a stator is further formed in the machine shell. A plurality of mounting shells are fixed to the outer side of the machine shell along the circumferential direction, notches are formed in the sides, away from the machine shell, of the mounting shells, and supporting rods are rotationally mounted in the notches through rotating shafts respectively. The movable ends of the supporting rods can rotationally stretch out of the notches, the rotating shafts are driven by the driving mechanisms, and the driving mechanisms are waterproof motors fixed to the mounting shells. The integrated submersible pump motor support is simple in structure, can be prevented from sinking to the bottom for use, enables a submersible pump to work stably and reliably, and is not prone to damage.

An integrated optimization mechanism for damping a hinge comprises a retaining element, a first connection arm element and a second collection arm element all of which are in hinged fit. A damper is arranged between the retaining element and the first connection arm element, one end of the damper is rotationally arranged on the retaining element, and the other end of the damper slides on the first connection arm element in a limiting manner, the second connection arm element is provided with an action part, and when the hinge is opened or closed, the first connection arm element, the second connection arm element and the damper are linked relative to the retaining element. When the hinge at least is closed by a certain angle, the second connection arm element acts on the damper through the action part and drives the damper to slide on the first connection arm element in a limiting manner, and the damper is compressed and produces damping force so that damping closing of the hinge can be achieved. The integrated optimization mechanism has the beneficial effects that the structure is simple and reasonable, safety and reliability are achieved, production and achievement are easy, adjusting is quick, operation is convenient, the service life is long, and in the opening and closing process, labor is saved, smoothness is achieved, collision is small and noise is low, and practicality is high.

The invention relates to the technical field of computer equipment, in particular to a high-security computer encryption auxiliary device with a data protection function. The auxiliary device comprises an equipment main body, positioning slide rails are fixedly connected to the left side wall and the right side wall in the equipment main body, and reset frames are fixedly connected to the lower surfaces of the positioning slide rails; a movable plate is fixedly connected to the right side face of the reset frame, an extrusion plate is fixedly connected to the lower surface of the movable plate, an electromagnet is fixedly connected to the position, located below the movable plate, of the bottom face in the equipment main body, and insect expelling powder in an air cushion is extruded and discharged, so that insects in a machine room are prevented from entering the equipment, thus the data lines and internal parts will not be damaged, the working failure of encryption software is avoided, the equipment is well protected, the limiting clamping plates and the clamping plates interact to limit the middle data lines, the data lines are prevented from being separated and loosened, and the working efficiency of the equipment is ensured.

The invention belongs to the technical field of garbage treating and particularly discloses a garbage solid liquid separating device which comprises an upper box. A hollow rotating shaft is connectedinto the upper box in a rotating manner. A round installing hole is formed in the side wall of the rotating shaft. A sealing ball is arranged in the installing hole in a clamped manner. A crushing blade is connected to the sealing ball. A first crushing blade adjusting mechanism and a second crushing blade adjusting mechanism are arranged in the rotating shaft. The first crushing blade adjusting mechanism comprises a lead screw, an adjusting rod and a first connecting rod. The first connecting rod is fixedly connected with the sealing ball. The adjusting rod is fixedly connected with a nut ofthe lead screw. The first connecting rod penetrates the end portion of the adjusting rod. The second crushing blade adjusting mechanism comprises a supporting shaft, a connecting arm and a second connecting rod. The supporting shaft is connected to the sealing ball in a rotating manner. The supporting shaft is fixedly connected with the crushing blade. One end of the connecting arm is fixedly arranged on the supporting shaft in a sleeving manner, and the other end of the connecting arm is hinged to one end of the second connecting rod. The other end of the second connecting rod is hinged to the inner wall of the rotating shaft. By the adoption of the garbage solid liquid separating device, the problem that at present, when garbage is crushed, a cutter is wound around by the garbage easilycan be solved.

The invention discloses a thrust vector control ball screw type gas vane servo mechanism which is composed of a plurality of servo units, the servo units are arranged around the inner wall of a gas vane cabin, the output end of each servo unit extends out of the tail end face of the gas vane cabin and then is connected with a vane piece, and the output end of each servo unit is connected with a servo motor. The servo unit comprises a servo motor, a ball screw transmission mechanism, a fixing frame, a shifting fork mechanism, a rudder shaft and an angle sensor, the servo motor is connected with a ball screw through a coupler, the ball screw converts rotary motion into linear motion of a screw nut, and the screw nut is rigidly connected with the shifting fork mechanism through a sliding block to drive the rudder sheet mechanism to deflect. The system is compact in structure, small in size and high in precision and transmission stability, the deflection angle of the rudder sheet is monitored in real time through the angle sensor and fed back to the servo motor controller, closed-loop control over the gas rudder servo system can be achieved, the influence of interference on the deflection angle of the rudder sheet is reduced, and therefore the control precision of the system is greatly improved.

The invention discloses a food residue and water separation device, which comprises an outer cylinder (1) and a hollow shaft (2). The hollow shaft is arranged in the outer cylinder and connected to a bracket bearing, and the hollow shaft is connected to the bearing of the outer cylinder. Near one end of the hollow shaft is perpendicular to the axial direction of the hollow shaft and is fixed with a material blocking plate (3) with an interference fit with it. The hollow shaft is provided with a number of discharge holes (4) on the side of the inner part of the outer cylinder. The outer cylinder The side is in the shape of an orifice, and the outer cylinder is equipped with a filter screen (5) that fits with the clearance, the hollow shaft and the outer cylinder are respectively equipped with a hollow shaft drive wheel (6) and an outer cylinder drive wheel (7), and the device also includes a controller (10), the hollow shaft is provided with a flow sensor (11) near the opening at the upper end, and a weighing sensor (12) is provided on the blocking plate. The beneficial effect of the invention is that it can automatically process food waste, and automatically adjust power according to the amount of waste, so as to achieve energy saving effect, better separation effect of slag and water, and the separated residue is easy to recycle.

The invention discloses a power relay plastic assembly, which comprises a base, a coil frame and a push rod, wherein a T-shaped insulation wall is arranged on the base, the base is segmented to a conductive system area and a magnetic circuit system area, a lead pin mounting hole and a positioning groove are symmetrically arranged at the front side and the rear side of the magnetic circuit system area, a positioning shaft of an H-shaped coil frame is inserted in the positioning groove of the base, the lower part of a right bottom plate of the coil frame is provided with a pair of rectangular lead pin seats and each of two vertex angles of the upper part of the right bottom plate is provided with a convex wire clamping bolt, a dynamic spring mounting hole and a static spring mounting hole are symmetrically arranged in the conductive system area of the base, acting plates with dynamic spring ports are symmetrically arranged in the front part and the rear part of the acting end of the pushrod, and a limiting block is vertically arranged on the back surface of the acting plate. According to the power relay plastic assembly, the structure is compact and novel, the size is small, and through rational layout among the base, the coil frame and the push rod, the creepage distance and the insulation of the relay are improved, excessive pull-in voltage to cause relay failure can be effectively avoided, the assembly and the positioning are convenient, and the precision is high.

The invention discloses a dual-purpose unlocking and locking mechanism which comprises a frame (1), a manual unlocking assembly (2), a push rod (9) and an electromagnetic locking assembly (13). The frame (1) is provided with the manual unlocking assembly (2) and the electromagnetic locking assembly (13), and the electromagnetic locking assembly (13) is composed of an electromagnet (16) and a torsional spring (18). The dual-purpose unlocking and locking mechanism is characterized in that the manual unlocking assembly (2) comprises a spring sheet (3), a cover plate (4), a pull ring (6) and a pull plate (7), the cover plate (4) is arranged on the outer portion of the spring (5), the spring sheet (3) is arranged on the lower portion of the cover plate (4), the pull ring (6) and the pull plate (7) are in sliding connection, the pull plate (7) is arranged on damping rubber (8), the push rod (9) is arranged on a rotating shaft (11), and the push rod (9) is in sliding fit with an inner ring of an annular support (10). The dual-purpose unlocking and locking mechanism is small in structural unlocking force, and reliable in locking.

The present invention provides a level shifting circuit and a semiconductor device, the level shifting circuit includes: a level conversion unit, which converts an input signal having a signal level of a first voltage into a signal having a signal level of a second voltage , the second voltage is higher than the first voltage. The level conversion unit includes first and second MOS transistors of a first conductivity type and third and fourth MOS transistors of a second conductivity type, the second conductivity type being different from the first conductivity type, and Switching is controlled according to the input signal. The third and fourth MOS transistors include drains supplied with the second voltage via the first and second MOS transistors, respectively. Upon detecting a decrease in the first voltage, the control unit controls body bias voltages of the third and fourth MOS transistors to decrease threshold voltages of the third and fourth MOS transistors. The present invention can prevent work failure when the power supply voltage is reduced.

The invention belongs to the switch technical field and discloses a lightning arrester-combined grounding switch and a method thereof. The lightning arrester-combined grounding switch includes a grounding switch main body, a zinc oxide lightning arrester, an electric operation mechanism and a motor shut-down control mechanism, wherein the electric operation mechanism includes a motor and a bevel gear drive mechanism. The lightning arrester-combined grounding switch of the invention has the advantages of simple, compact and reasonable structure, simple use method, suitability for being used under high current intensity, and excellent overall operating performance. The grounding switch is combined with the lightning arrester, so that the grounding switch can have the functions of the lightning arrester; when working under working voltage, the grounding switch is required to bear additional constant lightning impulse voltage, and the grounding switch main body cannot perform discharge or be grounded under the impact of the additional constant voltage, while, the lightning arrester will be converted into a conductive state from an insulated state, and performs disruptive discharge when additional lightning intrudes the switch or voltage is increased, and therefore, a certain lightning current or overvoltage can be led into the ground, and the grounding switch will not be impacted by the additional constant voltage, and the safety of related equipment can be well protected.