66results about How to "Reliable interlock" patented technology

The invention discloses a commutation switch type three-phase load imbalance treatment device at least comprising a control part and an execution mechanism. The execution mechanism includes at least one commutation switch. The control part consists of at least one main controller; and a current sensor for detecting current information of a branch grid is also arranged. A signal output terminal of the current sensor is connected with an input terminal of the main controller electrically. And the main controller is connected to a three-phase grid. Each main controller is connected to the at least one commutation switch by wired communication or wireless communication and the commutation switch is electrically connected to the load. Each main controller detects a three-phase unbalanced current, fault information as well as a current phase, and a current load current of the commutation switch controlled by the main controller. On the basis of the unbalanced calculation strategy, calculation is carried out to obtain each switch adjustment target phase and a commutation command is issued. Therefore, large surge current occurrence caused instantaneously during load switching can be avoided; losses resulted from long-term operation of the thyristor can be avoided; and commutation can be carried out without power interruption.

The invention relates to a connection assembly, comprising two connecting modules (1, 2) each with a load housing (51, 52) with the following features: a locking device with a spring locking element (9) and a latch piece (5), a magnet and armature construction and a movement track (60), on which the latch piece (5) can be moved from a closed position to an open position, the locking device, the magnet and armature construction and the movement track (60) cooperating by means of the following features: a. on opening, the connecting modules are moved on the movement track (60), wherein the magnet (8) and armature are moved in opposition and simultaneously the latch piece (5) and the spring locking element (9) are moved in opposition, until the spring locking element (9) is no longer engaged. On closing, the connecting module locks in with the aid of magnetic force. According to the invention, the position of the load housings (51, 52) and the position and form of the movement track (60) are designed such that on moving the connecting module the load housings (51, 52) move together by an amount Delta x against the load FL.

A panel, especially floor panel comprises a core produced of a wood product or a mixture of a wood product / synthetic material. The panel includes a top and a bottom, and is provided with mating hook elements on at least two opposite lateral edges thereof. The first hook element is formed by a profiled section which is essentially open to the top and the second hook element is formed by a profiled section which is essentially open to the bottom. The profiled section on the first hook element forms a projection which is essentially facing the top and on the second hook element forms a projection which is essentially open to the bottom. Two identical panels can be interconnected and interlocked by an essentially vertical joining movement in the horizontal and the vertical direction. At least one of the projections is deviated during the joining movement in the horizontal direction and then snaps into a locking edge which extends essentially in the horizontal direction to vertically lock the panels. At least one of the hook elements has a segmented design, thereby forming a plurality of parallel interspaced spring elements. The panel according to the invention is characterized in that the spring elements are diagonally arranged at an angle to the longitudinal axis.

The invention discloses a roller set for a universal mill, and the roller set comprises an upper horizontal roller, a lower horizontal roller, a pair of upright rollers and a quick roller-exchanging device, wherein the upper horizontal roller is provided with two upper bearing bases; the lower horizontal roller is provided with two lower bearing bases; each upright roller is provided with a roller bearing base; and the quick roller-exchanging device comprises a lower horizontal roller positioning rod, an upright roller positioning rod, an upper horizontal roller positioning rod and a lifting roller-exchanging trolley. When the roller is needed to be exchanged, the roller-exchanging trolley lifts and then drives all the positioning rods to stretch into countersinks which are correspondingly arranged on the bearing bases, thereby realizing the reliable support positioning, integrally forming the roller set, avoiding the relative movement among rollers and abrasion of the positioning rods when the roller set is quickly moved out or loaded, and being reliable in interlocking. When the roller set is needed to work, the roller-exchanging trolley descends so as to release all the supportpositioning relationships and then the roller set can start working quickly. The roller set for the universal mill has a simple and reasonable structure and can be used for efficiently increasing thereliability and maintainability of the roller set, reducing the difficulty of roller-exchanging operation, shortening the roller-exchanging time, and increasing the production efficiency.

A pneumatic gate unit of bowling apparatus is composed of a gate board able to be turned up and down around its horizontal rotary axle, a cylinder with a piston rod pivoted via pin to said gate board, a frame or wall for supporting the gate board, an optically (or magnetically) controlled open-close controller, and relative pneumatic and electric control systems. Its advantage is high speed to open or close gate.

The invention relates to an operating mechanism chassis truck interlocking device and an interlocking method thereof. A chassis truck rotating shaft of the chassis truck locking device and a chassis truck locking plate are installed on a chassis truck support in a parallel mode, and a limiting hook of the chassis truck locking plate is provided with an interlocking plate. A switching-on pinch plate is installed on a pinch plate shaft between clamping plates, and one end of the switching-on pinch plate abuts against the a switching-on half shaft between the clamping plates. The operating mechanism chassis truck locking device is characterized in that a half-circular half shaft end at one end of the switching-on half shaft extends out of the clamping plate on one side, the straight edge of the half-circular half shaft end of the switching-on half shaft abuts against the side edge of one end of the interlocking plate, the interlocking plate is installed on the clamping plates through a first fixing screw, parts where the first fixing screw is located of the interlocking plate are provided with sliding holes, the limiting hook of the chassis truck locking plate and an interlocking hook at the other end of the interlocking plate are buckled, and the chassis truck locking plate is driven by the rotation of the chassis truck rotating shaft to rotate. The chassis truck rotating shaft is shaken, the chassis truck locking plate is lifted, and an operating mechanism cannot be switched on. When the chassis truck rotating shaft is shaken in place, the chassis truck locking plate is pressed by the chassis truck rotating shaft, and the operating mechanism can be switched on.

The invention discloses a switchgear door interlocking mechanism which comprises a front isolation board, a grounding operation shaft which rotates relative to the front isolation board, a first interlocking device having a locking state and an unlocking state, a second interlocking device movably arranged on the front isolation board, and a limiting plate arranged on the grounding operation shaft, when the grounding switch opens, the limiting plate abuts against the second interlocking device to limit the first interlocking device to the locking state, and when the grounding switch closes, the second interlocking device moves upward to allow the first interlocking device to be in an unlocking state. The switchgear comprises the switchgear door interlocking mechanism. Rotation of the grounding operation shaft drives the grounding switch to open and close, and the limiting plate also rotates. When the grounding switch opens, the first interlocking device is under the locking state, and the door can not be opened. When the grounding switch closes, the first interlocking device is under the unlocking state, and the door can be opened. The switchgear door interlocking mechanism and the switchgear have the advantages of simple structure, easy processing, assembly and operation, lower cost, reliable interlocking and maintenance convenience.

The invention discloses a slow-closing type outdoor alternating-current high-voltage isolating switch with a built-in fracture. The slow-closing type outdoor alternating-current high-voltage isolatingswitch comprises a main loop unit, a main frame piece, an operating unit, an operating handle and an interlocking transmission unit, wherein the main loop unit is connected with a main switch througha connecting bar and used for controlling opening and closing of the isolating switch, the main frame piece is connected with the main loop unit and is used for placing the main switch, the operatingunit is used for driving the main loop unit to act to execute opening and closing of the isolating switch, the operating handle is connected with the operating unit and is used for outputting openingand closing actions, the interlocking transmission unit is connected with the main loop unit through a synchronizing shaft and is used for realizing bidirectional locking of the isolating switch by the main switch, the interlocking transmission unit and the operating unit are coaxially arranged, the interlocking transmission unit is linked with the operating unit to realize opening and closing ofthe isolating switch when the main switch is at the opening position, and the interlocking transmission unit unlocks the main switch and can operate the main switch to realize opening and closing when the isolating switch is at the opening or closing position. According to the invention, the main loop unit, the interlocking transmission unit, the operating unit, the main frame piece and the connecting bar are all used as independent mechanisms for production and are not arranged in sequence, the main loop unit, the interlocking transmission unit, the operating unit, the main frame piece and the connecting bar can be assembled through set positions to form the whole isolating switch, and the production and assembly process is simplified.

The invention relates to a switching-on interlocking device and a method for preventing interlocking failure. The switching-on interlocking device comprises a retaining arm and an interlocking connecting lever, wherein the retaining arm rotates along with a switching-on semi-shaft in a high-voltage switch operation mechanism and the interlocking connecting lever rotates along with the output shaft in the high-voltage switch operation mechanism. The switching-on interlocking device is characterized in that the interlocking connecting lever and the output shaft are connected coaxially and rotate in a relative limiting mode. A reset spring which resets the interlocking connecting lever and the output shaft is arranged between the interlocking connecting lever and the output shaft, wherein the interlocking connecting lever and the output shaft rotate relatively. The maximum reset elasticity of the reset spring is smaller than the reset elasticity of a reset torsion spring connected with the switching-on semi-shaft. When the end of the interlocking connecting lever abuts against one side of the retaining arm to limit rotation of the retaining arm, the interlocking connecting lever and the output shaft reach a limiting end of the limiting rotation stroke of the interlocking connecting lever and the output shaft under the action of the reset spring. The switching-on interlocking device is simple in structure, reliable in interlocking, not prone to failure, good in safety, suitable for being used as a switching-on interlocking device of the high-voltage switch operation mechanism or a structural improvement of a product of the same kind.

An adjusting apparatus for a comfort element swingable in relation to a support structure, in particular for an armrest of a vehicle, includes a latching device actuatable by adjusting the comfort element and having a latching arm connected to the comfort element and a latching lever interacting with the latching arm. A swing position of the comfort element is locked by providing a locking lever which is swingably articulated to the latching arm and has an engagement portion which locks the swing position by a spring force, when the engagement portion assumes an engagement position with a locking portion of a locking element that is fixed to the support structure, and the swing position of the comfort element is unlocked by an actuator by which the locking lever is disengageable from the engagement position with the locking element.

The invention relates to a gear interlocking device of a vehicle transmission and particularly relates to the gear interlocking device of a five-gear manual transmission. The device comprises three shifting fork shafts which are arranged on a transmission body in parallel and can move axially and three interlocking shifting levels which are arranged in a lamination mode along the axial line of the shifting fork shafts and can respectively rotate relative to the transmission body, wherein the three shifting fork shafts are arranged triangularly in space, when the interlocking shifting levels are located at the same side of the central connecting line of two adjacent shifting fork shafts and shifting fork shafts do not move in an axial direction, the interlocking shifting levels are inserted into grooves of the two adjacent shifting fork shafts with allowances; and when one of three shifting fork shafts moves in an axial direction, two interlocking shifting levels which are inserted into the grooves with allowances slide from the grooves and rotate relative to the transmission body, the two interlocking shifting levels are embedded in grooves of anther two shifting fork shafts with allowances, and the allowances are reduced. By the aid of the technical scheme, the reliable interlocking among gears of the transmission is achieved, and the spatial design of the transmission is easy.

The invention provides a method for detecting state of an observation hole cover of a coke oven. The method comprises the following steps: mounting a temperature detection device on a part which is capable of scanning the observation hole cover and is away from the observation hole cover, and then detecting the temperature of the observation hole cover; detecting the opening / closing state of the observation hole cover; detecting the damaged condition of the observation hole cover; utilizing the temperature detection device to detect the temperature of the observation hole cover in real time and transmitting the detected data to a control device in the running process of the coke oven. The method fully combines the production characteristics of the coke oven, the operation characteristics of a coal car and an automatic detection technology for quickly detecting the opening / closing state of the observation hole cover, realizing the reliable and safe interlocking of the coal loading operation, detecting and judging if the unit is away from the high temperature area; the method is the most direct and most reliable detection technology for the opening / closing state of the observation hole cover; the method is capable of monitoring the working state of the observation hole cover in real time, finding the problem in time and preventing the observation hole cover from exploding and thecoke oven body from irreversible damage; the method is an important supporting technology for the coke oven safety production.

The invention provides an isolation interlocking device of a 40.5kV vacuum combined electrical appliance complete device and is characterized in that the isolation interlocking device comprises an operating shaft, the operating shaft is arranged at the upper end of a combined electrical appliance installation cabinet frame by fixed bent boards of operating mechanisms arranged at the two ends, a cam disk is arranged at the end part of the operating shaft, a positioning device is arranged on the cam disk, an interlocking board of a maintenance room door of a switch device is arranged below the cam disk, an upper isolation insulating board is arranged at the upper side of the operating shaft by a first fixed bent board at the two ends of the bottom part, a second fixed bent board is arranged at the outside of the end part of the first fixed bent board, a lower isolation insulating board is arranged at the upper end of the second fixed bent board, and a guide rail bent board is arranged at the outside of the second fixed bent board and is fixed on the combined electrical appliance installation cabinet frame. The isolation interlocking device has the advantages of simple operation with less labour and reliable interlocking.

The invention relates to a grounding switch interlocking device for a high-voltage switch cabinet. The grounding switch interlocking device for the high-voltage switch cabinet comprises a wedge-shapedinterlocking sliding sheet which is wide at the upper part and narrow at the lower part and is mounted on the front upright column of the switch cabinet; when sliding downwards along the front upright column, the wedge-shaped interlocking sliding sheet pushes an interlocking sheet moves backwards through the wedge-shaped side edge of the wedge-shaped interlocking sliding sheet, so that the interlocking sheet can drive the interlocking mechanism of the circuit breaker of the switch cabinet to move in a linkage manner; a mounting hole matched with a grounding switch operating rod is formed in the wedge-shaped interlocking sliding sheet; the grounding switch operating rod is provided with a limiting sheet; when rotating, the grounding switch operating rod drives a limiting sheet to rotate, so that the limiting sheet can clamp or release the wedge-shaped interlocking sliding sheet; and the wedge-shaped interlocking sliding sheet is reset through a tension spring between the wedge-shaped interlocking sliding sheet and the front upright column of the switch cabinet. The grounding switch interlocking device has the advantages of simple structure, convenient operation and reliable interlocking.

The invention relates to an automatic pushing and positioning device, comprising a single-rod hydraulic cylinder and a plunger cylinder which share one cylinder body, wherein a gear is coaxially arranged between a piston and a piston rod of the single-rod hydraulic cylinder, a piston of the plunger cylinder is a rack plunger, is meshed with the gear and can relatively slide along the extension direction of teeth, a swing rod which extends along the radial direction of the gear is fixed on the piston rod, a positioning structure for positioning parts is arranged on the swing rod, and two hydraulic cylinders controls the motions of the opposite party in certain direction through control oil ports arranged on the lateral wall of respective cylinder. The automatic pushing and positioning device can conveniently realize the coincidence between the practical process reference and the design reference of the workpiece and solves the problems of reference transformation as well as large machining error, high cost and long man-hour caused by reference transformation; in addition, a great amount of control valves and indication switches can be saved by adopting a hydraulic element structure integrating the functions of the hydraulic cylinder and the control valve into a whole, and reliable interlocking of motion time can be ensured.

The invention relates to a locking key integrated control type mini-printer, which effectively solves the problems in the prior key-press type door opening mechanism such as strenuous opening and high mal-operation liability causing malfunction. The mini-printer comprises a panel, a casing, a printing unit assembled inside the casing, a bracket, and a paper door opening device; and is characterized in that a key cap of the paper door opening device protrudes out of the panel, the locking shafts of the key cap are assembled together via a locking shaft guide sleeve fixed on the inner side of the panel, and by matching a position-limiting table and a sliding chute positioned on the locking shaft guide shaft with a claw on the key cap respectively, the position limitation or movement of the ends of the locking shafts along the axial direction thereof is controlled, so as to directly or indirectly control the rotation of a swing link of the paper door opening device. The inventive mini-printer has the advantages of compact transmission structure, stable integrated control action, flexible door opening, tight door closing, and reliable interlocking; and completely eliminates key-press mal-operation and ensures the safe handling and normal operation of the printer. The loose or detachment of the transmission members can be avoided by randomly changing the casing position, so as to remarkably improve the service performance and service life of the printer.

The invention pertains to a telescopic vacuum cleaner suction tube (1) with an outer tube (2), an inner tube (3) with snap-in depressions (7) that is telescopically arranged in the outer tube, an antitwisting mechanism (4d; 16) and an interlocking device with a snap-in element (15) that is disengaged from a snap-in depression (7) by an actuating element (5) situated about diametrically opposite thereof, wherein the interlocking device consists of a bow spring (6) that positively encompasses at least the inner tube (3) and once again engages the snap-in element (15) into the nearest snap-in depression (7) of the inner tube (3) in the telescoping direction under the prestress of a spring. The invention aims to develop a telescopic vacuum cleaner suction tube of the initially cited type that significantly lowers the manufacturing and assembly expenditures of the interlocking device and ensures that the tubes are always securely interlocked and able to withstand shock-like compressive forces, namely while simultaneously providing for an ergonomic handling.

The invention relates to a three-position positioning interlocking mechanism traction lock plate anti-misoperation reinforcement mechanism assembly and a drawer unit. The three-position positioning interlocking mechanism traction lock plate anti-misoperation boosting mechanism assembly comprises a three-position positioning interlocking mechanism, a traction lock plate and a boosting propelling mechanism, the three-position positioning interlocking mechanism locks the boosting propelling mechanism through the traction lock plate, and anti-misoperation is achieved. When the three-position positioning interlocking mechanism drags the lock plate anti-misoperation boosting mechanism to move from the separation position to the test position along with the drawer and is positioned, the boostingpropelling mechanism starts to enter a matching state. The drawer unit comprises the three-position positioning interlocking mechanism traction lock plate anti-misoperation reinforcement mechanism assembly. The beneficial effects are that three-position positioning is reliable, the boosting propelling mechanism has an anti-misoperation locking function, and operation can be carried out only afterlocking is opened. The drawer unit with the mechanism assembly has two operation functions of hand pulling operation and force increasing operation, the operation is simplified, and the operation is still easy and convenient.

The invention discloses an indoor metal armored draw out type switch device which comprises a cabinet body and a handcart which can be drawn out. The cabinet body is formed by connecting aluminized zinc plates through bolts. A handcart room, a bus room, a cable room and a relay instrument room are arranged in the cabinet body. The cable room is arranged at the lower part of the cabinet body. The relay instrument room is arranged at the upper part of the front part of the cabinet body. The handcart room is arranged below the relay instrument room. The bus room is arranged behind the handcart room. The cable room is arranged below the bus room. The circuit breaker handcart is arranged in the handcart room. An interlocking device is arranged on the circuit breaker handcart. A heater is arranged on the cable room. The indoor metal armored draw out type switch device provided by the invention has the advantages of novel structure, small volume, reliable interlocking, high protection level, strong interchangeability, convenient operation and maintenance, flexible installation and convenient wiring, and fully meets the requirements of 'five-prevention'.

The invention discloses a direct-current traction trolley for a motor car, and aims at solving the problem that an existing direct-current breaker for the motor car is inconvenient to push forwards and backwards, and unreliable in interlock. The direct-current traction trolley comprises a frame, a screw rod, a handle rack, an end beam, a hand shank and a trolley body, wherein driving wheels are arranged at two sides of the trolley body; a sliding plate and a handle are arranged on the end beam; one end of the screw rod is arranged on the end beam and the other end passes through the sliding plate and the end beam and is arranged on the trolley body; the sliding plate comprises a first position and a second position; the first position is clamped with the end beam through the handle to limit rotation of the screw rod; the second position is clamped with side plates to relieve rotation limit on the screw rod after being driven to slip oppositely to the end beam by the handle; and the sliding plate has a movement trend close to the second position. According to the direct-current traction trolley for the motor car, the end beam is fixed reliably, and meanwhile, the rotation of the screw rod is limited through the sliding plate, so that misoperation of a worker is avoided; the safety of the worker is ensured; and the direct-current traction trolley has the advantages of being convenient to assemble, reliable to interlock, stable in action, reliable in connection of the breaker, long in service lifetime and the like.

The invention discloses a high-efficiency composite converter lower suspension connection system. The high-efficiency composite converter lower suspension connection system comprises coupling wheels,balance seats, a supporting column, a workbench, a working chamber, a limiting block, a guide rail, a middle shaft sliding rail, a trolley, a gyroscope, sliding blocks, a stretcher, a transmission, areduction wheel, a hanging arm, a connecting wheel and a converter, wherein the reduction wheel is fixedly connected with the connecting wheel through the hanging arm; the lower end of the connectingwheel is fixedly connected with the converter; the guide rail is slidably connected with the stretcher; the sliding blocks are embedded in the two ends of the stretcher; and the right side of the stretcher is fixedly connected with the transmission. According to the high-efficiency composite type converter lower suspension connection system, the structure bearing is improved accurately through a reasonable structure, the stability and reliability of operation of lower suspension connection are further enhanced, it can be ensured that the converter is controlled reliably by high-efficiency composite shaft symmetric structures distributed on the two sides of the workbench, the lower suspension connection system can be powered off in time when accidents occur, and a certain protection effectcan further be achieved.

The invention belongs to the technical field of a middle voltage electric transformation and distribution system and discloses an integrated fixed ISM breaker. The integrated fixed ISM breaker comprises a breaker body, a framework connected with the breaker body, a foundation for mounting the breaker body and the framework, an opening button, a closing button, a control module which is mounted on the framework to control a breaker for closing and opening, a state indictor and an opening and closing state indication device used for determining closing and opening of the breaker body. The integrated fixed ISM breaker is advantaged in that the control module is integrated in a handcart, a closing and opening indication function, a state indication function and a counter function are all integrated on the fixed breaker, and an integration degree is high; the breaker is interlocked, and interlocking with a cabinet is realized; the fixed breaker is set to employ a secondary plug socket, and wiring and maintenance are convenient.

The invention discloses a three-position spring operating mechanism which comprises symmetrically disposed front and rear clamping plates between which an energy storage control mechanism is fixedly installed. An interlocking mechanism is arranged on the other side of the front clamping plate. The interlocking mechanism comprises an operation interlocking mounting plate fixedly disposed on the front clamping plate; an operation hole locking plate slidably arranged on the operation interlocking mounting plate; a guiding mechanism; a closing and opening position locking plate; a main knife operating shaft and a ground knife operating shaft disposed at the upper and lower ends of the guiding mechanism. The guiding mechanism has a first position that is driven by a closing and opening positionshift fork to be in stopping engagement with the stopping portion of the main knife operating shaft and a second position to be in stopping engagement with the stopping portion of the ground knife operating shaft, thereby achieving an effect that one interlocking component realizes reliable interlock between the main knife operation hole and the ground knife operation hole, ensuring the logical operation sequence of the mechanism, improving the disadvantages that a plurality of independent components lock the operation holes in the past, improving the complicated linkage program between multiple components, reducing many fault point, making the interlocking device more concise and reliable than a previous interlocking device, achieving simpler and clear operation, reducing a misoperationprobability, achieving good practicality.

A solid-insulated ring main unit comprises a fuse unit, an operation mechanism, a bus unit, a control room unit, a metal plate cabinet body, a pole column body, a visual window and a light-permeable window, wherein the visual window is formed in the front face of the metal plate cabinet body, the light-permeable window is formed in the pole column body at the back of the metal plate cabinet body, and the closing position of the visual window, the closing position of the light-permeable window and the closing position of an isolating switch share the same axis. According to the solid-insulated ring main unit, devices and connection relations which lower the overall reliability in existing product structures on the market are redesigned, complex linkage structures of various main parts are replaced, the man-machine interaction characteristics of equipment are improved, the defects of existing linkage structures on the market are overcome, safety and reliability are improved, and the cost is lowered.

The invention discloses a novel three-station knife switch switching operation device mechanism, which comprises a mechanism base, a knife switch switching handle, a linkage plate, a first limiting block, a second limiting block, a main shaft and a knife switch operation sleeve. The first limiting block is a grounding and opening limiting block; the second limiting block is a closing and opening limiting block; the first limiting block is arranged on the first side edge of the mechanism base; the second limiting block is arranged on the second side edge of the mechanism base; the first side edge and the second side edge are two non-adjacent side edges; the first limiting block and the second limiting block are connected with the mechanism base in a sliding manner; the two ends of the linkage plate are connected with the first limiting block and the second limiting block correspondingly; the knife switch switching handle is arranged on the linkage plate; the knife switch operating sleeve sleeves the main shaft; the rotation center of the main shaft coincides with the rotation center of the knife switch operating sleeve. The mechanism is simple and reliable in structure, small in occupied space, easy to operate and maintain, simple in knife switch switching and reliable in interlocking.

The invention discloses a mechanical and electric interlocking device of a switching appliance. The device comprises a mounting plate, an interlocking plate and a first interlocking mechanism. Two first through holes 11 and 12 which are at an interval leftwards and rightwards are formed in the mounting plate; and the two first through holes 11 and 12 respectively correspond to two manual operation transmission rod assemblies 21 and 22. The interlocking plate can be connected with the mounting plate in a manner of sliding leftwards and rightwards and is provided with two second through holes 31 and 32 which are at an interval leftwards and rightwards; and the distance between the two second through holes 31 and 32 is different from that between the two first through holes 11 and 12. A first interlocking mechanism comprises shutting rod assemblies 41 and 42 of the state of a linked switching appliance; the shutting rod assemblies 41 and 42 move relatively to the mounting plate according to the change of the position of the switching appliance; and the movement can control whether the interlocking plate to slide leftwards and rightwards relatively to the mounting plate or not. The mechanical and electric interlocking device of the switching appliance has the advantages that the first interlocking mechanism is arranged so that the interlocking device can realize the manual operation isolation and the interlocking between every two grounding mechanisms and can realize the interlocking between the switching position and the manual operation.