69results about How to "Guaranteed power transmission" patented technology

The invention provides an inner rotor direct-driving type structure of a suspension type single-rail train. The structure comprises a framework of a bogie, wherein the framework of the bogie comprises a side frame, cross beams and a framework center platform; an air spring and a sleeper beam are arranged on the framework center platform; transverse pull rods are arranged on the front side and the back side of the sleeper beam; the sleeper beam is press-fitted on the air spring; a suspension device is a four-connecting-rod mechanism; a pair of traveling wheels is transversely arranged on each of outer sides of the side frame; guiding wheels are arranged at two ends of the side frame; and an inner rotor type permanent-magnet motor for providing rotating power for the traveling wheels is arranged between each pair of the transverse traveling wheels. According to the structure, the inner rotor type direct-driving motors are used as driving devices of the bogie, so that the energy conversion efficiency is greatly improved; and meanwhile, the size and the heating value of the motors are reduced, the structure of the bogie is simplified, the reliability of the bogie is improved, the maintenance cost is reduced, and noise caused by the bogie during running is reduced.

The invention provides a detection method for the design of a grounding grid of a substation, which includes the steps: building a boundary element model of the grounding grid; obtaining impedance characteristics of a grounding grid conductor; computing the grounding resistance of the grounding grid according to the impedance characteristics of the grounding grid conductor and the built boundary element model; obtaining total fault current and current divider coefficient of the grounding grid; determining the quantity of potential rise caused by the grounding grid according to the total fault current, the current divider coefficient and the grounding resistance of the grounding grid; and adjusting equipment parameters corresponding to the grounding grid according to the quantity of potential rise caused by the grounding grid. The invention further provides a detection device for the design of the grounding grid of the substation, which can be used for increasing the accurate rate of the grounding resistance of the grounding grid of the substation, increasing the accurate rate of the quantity of potential rise caused by the grounding grid and ensuring safety of staff and normal power transmission.

The invention relates to a vacuum breaker used for electric locomotives and motor train units, which is a vertical column and consists of a high voltage part, an insulation supporting part and a low voltage control part which are sequentially laminated from top to bottom; the vacuum breaker is characterized in that a spring mechanism in the high voltage part is an integrated three-column typed spring mechanism and consists of a closing spring, a pressing plate component which pushes through the spring, a cylindrical chamber which receives the closing spring, a connecting base which is connected with a movable contact and a spring cover which is matched with the connecting seat; the pressing plate component, the spring cover and the closing spring are arranged coaxially. The invention improves the mechanical service life which is up to more than 300,000 times of use, greatly reinforces the insulation performance, quickens the response speed, improves the on-off performance (up to 660MVA) of the product by reasonable configuration of operation force and operation speed, has an inherent opening time less than 30ms, has fast response speed and can protect the locomotive equipment and safety of personnel better.

The invention relates to a vertical connection structure of a prefabricated concrete shear wall and a construction method thereof, and belongs to the technical field of a building structure. The vertical connection structure comprises a prefabricated concrete shear wall, additional steel bars, hole filling cement-based cementing materials and cement concrete post-pouring strips, wherein one row ofstrip-shaped slot holes are reserved at each of the top and the bottom of the prefabricated concrete shear wall; the slot holes are distributed between vertical stress steel bars in the wall; when the prefabricated wall bodies are vertically spliced, the slot holes of the upper and lower layers of wall bodies are aligned and communicated in the splicing seam positions; the through length additional steel bars are put into the slot holes; and the cement-based cementing materials are poured for fixation. The concrete is cast in situ in the horizontal splicing seam positions to form the post-pouring strips. The upper layer prefabricated concrete shear wall and the lower layer prefabricated concrete shear wall are firmly connected in the vertical direction through the additional steel bars, the hole filling cement-based cementing materials and the concrete post-pouring strips; and the force is reliably transferred. The vertical connection structure of the prefabricated concrete shear wallhas the advantages that the connection performance is identical to that of the existing grouting sleeve connection structure; the integrality and the safety of the structure are effectively ensured;the stress mechanism is clear; the construction is convenient; and economic performance and practicability are realized.

The invention provides a double-cylinder pumping device hydraulic oil displacement control method, and further provides a double-cylinder pumping device and pumping equipment. According to the double-cylinder pumping device hydraulic oil displacement control method, from the moment a piston of a first main hydraulic cylinder or a piston of a second main hydraulic cylinder moves and reaches a predetermined position, a cavity with a rod and a cavity without a rod of the first main hydraulic cylinder and a cavity with a rod and a cavity without a rod of the second main hydraulic cylinder are respectively communicated for a first lasting time t1; from the predetermined position, each cavity with a rod and a corresponding cavity without a rod are divided for a second lasting time t3, and therefore hydraulic oil inside communicated cavities is displaced during the time interval which is the difference of the second lasting time t3 and the first lasting time t1. When oil displacement operations are conducted according to an oil displacement mode in the stretching and drawing process of the first main hydraulic cylinder and the stretching and drawing process of the second main hydraulic cylinder, the temperature of the hydraulic oil in the communicated cavities is detected, the first lasting time t1 and / or the second lasting time t3 is adjusted to change the span of the time interval, and therefore requirements for temperatures of working conditions are met. Oil displacement operations in the communicated cavities of the double-cylinder pumping device can be controlled in a relatively optimized mode through the double-cylinder pumping device hydraulic oil displacement control method, the double-cylinder pumping device and the equipment, and therefore the energy saving effect is achieved.

An electric power steering system with a worm gear includes a worm shaft and a worm wheel, wherein an electric motor is associated with the worm shaft, which is connected to the worm shaft in a force-transmitting manner. A bearing element, arranged on the worm shaft at the end of the worm shaft facing away from the electric motor, is received in a guide bush, wherein the guide bush has, on its circumferential side, a passage opening. It is provided a pre-tensioning device comprising a spring-loaded actuator element extending through the passage opening of the guide bush and acting on the wormshaft in the direction of the worm wheel with a defined pre-tensioning force (K), wherein the pre-tensioning device comprises a limiting device which is adapted to limit a pivoting movement that displaces the worm wheel away from the worm shaft. Furthermore, it is proposed a method for the production of steering systems and a test system for performing the method.

The invention discloses a disinfection device for a livestock breeding apparatus. The disinfection device structurally includes a disinfection turntable, a machine box, a temperature control knob, a switch, a temperature display, a box door, a handle, high temperature glass, a hinge and protective rubber. The disinfection turntable is horizontally fixed inside the machine box and electrically connected with the switch, the switch is fixed between the temperature control knob and the temperature display and is on one straight line with the temperature control knob and the temperature display, the handle is fixed in a groove at the front end of the box door through a screw, periphery glue of the high temperature glass is connected with the front end of the box door, and the protective rubbersurrounds and is fixed at a sharp corner of the groove of the machine box. The disinfection turntable of the disinfection device for the livestock breeding apparatus mainly performs rotation operation up and down, the improved disinfection device for the livestock breeding apparatus can make an instrument placing tray subjected to rotation and disinfection in a disinfection box to make the disinfection more thorough and reduce bacterial residues.

The invention relates to an automobile transmission shaft torsion damper. The automobile transmission shaft torsion damper comprises a torsion damper body and is characterized in that the torsion damper body comprises an active flange connected with a transmission shaft in a matched manner, a driven flange with the front portion matched with the active flange, and a supporting flange matched withthe rear portion of the driven flange and connected with the active flange in a fastening manner; the active flange, the driven flange and the supporting flange are coaxially arranged, and the drivenflange is in axial clearance fit with the active flange and the supporting flange; and an inner spline is arranged in the middle portion and the rear portion of the driven flange, and a main speed reducer small gear shaft is matched with the inner spline of the driven flange. By means of the automobile transmission shaft torsion damper, the additional bending moment brought by the included angle of the transmission shaft can be resisted, the overturning effect caused by a universal joint can be effectively resisted, and the automobile transmission shaft torsion damper is suitable for the condition where the included angle of the transmission shaft and a rear axle is large; the transmission smoothness can be improved; and the impacts of a rear axle gear can be buffered, noise is lowered, and power transmission during normal running of vehicles can also be ensured.

The invention discloses a power driving device for a manual wheelchair. A lateral edge of a frame of the wheelchair is provided with a seat which can swing for displacement; the seat is provided with a drum set which can be driven by a driving source to rotate; the drum set can be made to swing for displacement along with the seat to be joined to a main wheel of the wheelchair so as to perform transmission; the seat is additionally connected with an engaging and disengaging mechanism to control the seat to do reciprocal swing displacement and drive the drum set to be joined to or separated from the main wheel of the wheelchair so as to switch a driving mode of the wheelchair; and thus, the driving mode of the wheelchair is switched by using the engaging and disengaging mechanism, power can be provided to drive the manual wheelchair, easiness in operation and convenience in folding of the manual wheelchair can be guaranteed, and further, the practical benefit for convenience in use of the wheelchair can be greatly improved.

The invention discloses a gas transfer type anti-freezing and high-temperature-resistant cable, and belongs to the cable field. According to the gas transfer type anti-freezing high-temperature-resistant cable, a self-bulging layer and an interlayer transfer line are arranged; at high temperature, the self-bulging layer is heated to expand, the interlayer transfer line is driven to move upwards, therefore, the self-bulging layer is filled with interlayer protective gas from the flexible interlayer, and spreading of external high-temperature heat into the wire core layer can be effectively inhibited and slowed down; and at low temperature, the self-bulging layer restores to the original shape, the interlayer transfer line is mutually folded on the outer surface of the inner sheath to form atemperature isolation layer, leakage of the temperature generated during the operation of the cable can be effectively inhibited, and the cable can effectively isolate external low-temperature invasion. Thus, it is further ensured that the power transmission efficiency of the cable is not liable to be affected by low temperature, external high temperature is prevented from getting close to the internal wire core layer at high temperature, and further the normal power transmission effect of the cable is effectively guaranteed.

The invention discloses a window-type air conditioner, which comprises an indoor panel, a case, an evaporator, an indoor fan, a condenser, an outdoor fan, a motor, a compressor and a base plate, wherein an elastic bump is arranged at the tail end of a lower motor shaft; and a groove matched with the elastic bump is formed on the inner wall of a lower fan shaft which is combined with a lower centrifugal fan and the lower motor shaft. When the lower motor shaft and the lower centrifugal fan are arranged, the elastic bump is used for clamping the groove in the lower fan shaft and fixing the lower centrifugal fan and the lower motor shaft, so that the lower centrifugal fan is firmly fixed with the lower motor shaft together; the elastic bump is arranged on a flat part at the tail end of the lower motor shaft, so that the transmission of power to the lower centrifugal fan through the lower motor shaft can be ensured, and the accuracy of a fixed position can be ensured; and when the centrifugal fan is required to be detached, only a button on the lower motor shaft is required to be pushed, so that the elastic bump is retracted towards the inside of the lower motor shaft, namely the elastic bump can be separated from the groove, and the lower centrifugal fan can be conveniently separated from the lower motor shaft.

The invention discloses a variable-cycle upshift process control method for a multi-gear wire control automatic transmission. The method comprises the following steps: judging whether the first gear is shifted to the second gear, the second gear is shifted to the third gear and the third gear is shifted to the fourth gear by detecting a D-gear switch signal, a vehicle speed signal v of a vehicle speed sensor and an opening signal alpha of an accelerator pedal position sensor by an electrical control unit, and controlling the power-on current of an electromagnetic clutch in each upshift process; taking the process of shifting the second gear to the third gear as an example, by a variable cycle function T(v), controlling the power-on current of a third-gear electromagnetic clutch according to a power-on current function I3b(t) (I3b(t)={I3, t is not less than 0 and not more than T[delta]; kI3+I3(1-k)(t-T[delta]) / (T23-T[delta]), t is more than T[delta] and not more than T23}) of the third-gear electromagnetic clutch, and controlling the power-on current of a second-gear electromagnetic clutch according to a power-on current function I2b(t) (I2b(t)={I2, t is not less than 0 and not more than IT[delta]; 0, t is more than IT[delta] and not more than T23}) of the second-gear electromagnetic clutch by the electrical control unit, so that the control on the upshift process of the wire control automatic transmission is finished. According to the method, the interruption of input power of an engine in the upshift process and the impact of shifting can be avoided, and the upshift process of the wire control automatic transmission is stable.

A locking movement mechanism of an actuator comprises an actuator body and a one-way output device, wherein the one-way output device comprises a fixed shell, a driving shaft, a driven output shaft, a first driving piece and a second driving piece, and the first driving piece and the second driving piece are arranged between the driving shaft and the driven output shaft; a first linkage groove and a second linkage groove are formed in the driven output shaft, the first driving piece is fixedly connected with the driving shaft, the first driving piece is inserted into the first linkage groove, and at least part of the second driving piece is located in the second linkage groove and is in clearance fit with the second linkage groove; a driving groove is formed in the driving shaft, a locking groove is formed in the fixed shell, the second driving piece is movably arranged in the driving groove, and the second driving piece can be clamped into or separated from the locking groove under the guide of the driving groove. According to the invention, the power transmission from the driving shaft to the driven output shaft is guaranteed, and power transmission from the driven output shaft to the driving shaft is also cut off, so that the driving shaft can be effectively prevented from being driven by external force, and therefore using safety is guaranteed.

The invention discloses an electromagnetic-friction power generation water flow power generation device and relates to the power generation equipment field. In order to achieve the above purpose, thedevice comprises a support, a friction power generation system and a mechanical energy transmission system. The friction power generation system comprises a first insulating cylinder, a first electrode, a first friction layer, a second friction layer, a second electrode and a second insulating cylinder. The second insulating cylinder is arranged in the first insulating cylinder. The first electrode is arranged on an inner wall of the first insulating cylinder, and the first friction layer is arranged on the inner wall of the first electrode. The second electrode is arranged on an outer wall ofthe second insulating cylinder, and the second friction layer is arranged on the outer wall of the second electrode. The first friction layer and the second friction layer are relatively and circularly rotated and cooperated. The device is simple in structure and reliable in operation, can be capable of fully using water flow kinetic energy in various river water so as to collect micro kinetic energy of the river water, and simultaneously, scouring of the river water to two banks can be reduced, a popularization value is large and energy-saving significance is great.

The invention provides a solar photovoltaic power station used on the sea surface, and relates to the technical field of solar power generation. The solar photovoltaic power station comprises a floating plate floating on the sea surface and a fixator arranged at the bottom of the floating plate, the fixator falls into the seabed position, the middle position of the bottom of the floating plate isconnected with a tensioning rope, the bottom of the tensioning rope is fixedly connected to the fixator, a fixed shaft rod is arranged in the middle of the top end of the floating plate, a power generation plate supporting frame is fixed to the top end of the fixed shaft rod, an obliquely-fixed photovoltaic power generation panel is fixedly installed at the top end of the power generation plate supporting frame, and a storage battery is arranged at the bottom of the photovoltaic power generation panel. The obliquely-fixed photovoltaic power generation panel is installed at the top end of the floating plate, the photovoltaic power generation panel absorbs solar energy at the top end of the power generation panel supporting frame, light energy is converted into electric energy through the photovoltaic power generation panel to be stored in the storage battery, and the electric energy stored by the storage battery is used in the later period.

The invention discloses a cable installation tunnel structure comprising a tunnel, N cable placing devices, lighting lamps and M anti-theft devices. The cable placing devices are distributed on the inner walls of two sides of the tunnel evenly and comprise supports and semi rings; one ends of the supports are connected to the inner wall of the tunnel, and the other ends are connected to the semi rings; the lighting lamps are located on the upper end surface of the tunnel; the anti-theft devices are distributed on the inner walls of two sides of the tunnel evenly and comprise chains, circular clamping members, locks and P tool boxes. The structure is reasonable in design, cables are not prone to chemical corrosion, normal power transmission is guaranteed, the anti-theft facility is arranged, the cables are prevented from being stolen, and the technical effect of facilitating work humanization is achieved for operators.

The invention discloses an axial supporting structure of a small horizontal axis wind turbine. The axial supporting structure comprises a base and the small horizontal axis wind turbine arranged at the top of the base; the small horizontal axis wind turbine comprises a horizontal input shaft, a horizontal output shaft and an impeller arranged at the front end of the horizontal input shaft; at least two supporting seats are arranged at the top of the base in the axial direction, at least three horizontal bearing shafts are uniformly distributed between the at least two supporting seats in the circumferential direction, and bearings are arranged at the front end and the rear end of each bearing shaft; the horizontal input shaft is clamped between outer rings of the bearings, and the horizontal input shaft can move backwards in the axial direction when being subjected to axial thrust; and an elastomer is arranged in a hollow cylinder body of the front end of the horizontal output shaft, and the elastomer is compressed only when the horizontal input shaft is subjected to the axial thrust. A connecting mechanism can buffer the axial thrust generated by a wind wheel to a great extent while guaranteeing power transmission between the input shaft and the output shaft, impact on other subsequent power units is avoided, and stability of a system is improved.

The invention discloses a pressure characteristic abnormity processing method for a DCT (dual clutch transmission), which is characterized in that under certain conditions, according to different working conditions of a clutch, distinguishing diagnosis is performed by combining actual pressure and target pressure, corresponding processing is performed by using information such as vehicle speed, KP pressure and gear, and specifically, in a complete combination state, a limp flushing program can be decided to be executed based on the vehicle speed, pressure difference and KP pressure; in the oil pre-charging state or the preparation working state, the limp flushing program can be decided to be executed based on the actual pressure, the target pressure, the pressure difference and the KP pressure; and trying recovery is carried out by adopting flushing measures, pressure characteristic abnormal faults are output in time after trying is invalid, and the limping mode is controlled to be entered. On the premise of preventing false alarms, the problem that pressure characteristic abnormity is difficult to diagnose is effectively avoided, and by differentially treating the working conditions of the double clutches, the drivability problem caused by the pressure characteristic abnormity can be avoided, and meanwhile power interruption can be avoided.

The invention discloses a variable-direction transmission device. The variable-direction transmission device comprises a base, a rotating shaft is arranged on the base, a control lever is fixedly connected to one end of the rotating shaft, a handle is arranged at the tail end of the control lever, a first transmission connector is arranged at the other end of the rotating shaft, and a second transmission connector is connectedly fastened onto the first transmission connector. The first transmission connector and the second transmission connector in movable connection through a connection rod are made of tungsten steel and form an obtuse angle. Due to the fact that the first transmission connector and the second transmission connector are arranged on a body of the variable-direction transmission device and movably connected through the connection rod, the requirement on angle variation can be better met while power transmission is guaranteed, and accordingly application range of the transmission device is greatly widened.

The invention provides an arc suppression switch which includes a base. A first binding post and a second binding post are respectively arranged on the two sides of the base. The first binding post is electrically connected with a nearby hinge mount used for hinging a cutter bar. The second binding post is electrically connected with a nearby conductive bayonet mount used for clamping the cutter bar. A cushion mount is arranged between the conductive bayonet mount and the hinge mount. A metal bayonet for clamping the cutter bar is arranged at the upper end of the cushion mount. The metal bayonet is connected in series with an inductor, and then electrically connected with the conductive bayonet mount. The height of the metal bayonet on the cushion mount meets the following condition: when the cutter bar is closed, the cutter bar contacts the metal bayonet of the cushion mount first, and then contacts the conductive bayonet mount. The switch can suppress arcs in the opening / closing process, and is of high safety.

The invention discloses an automobile sub-frame with a rear suspension splash guard. The automobile sub-frame comprises the sub-frame, wherein an engine rear suspension installation cavity is arranged in the middle of the sub-frame, the rear suspension splash guard is arranged in the middle of the back side of the sub-frame and is fixed on the sub-frame through screws / buckles arranged on the left side and the right side, and an engine rear suspension through hole is formed in the middle of the rear suspension splash guard. A notch is arranged on the rear suspension splash guard at the position close to one screw / buckle and penetrates from the edge of the outer side of the rear suspension splash guard into the engine rear suspension through hole, the other side of the rear suspension splash guard located on the notch side extends to form an overlapping structure, and one screw / buckle is rightly arranged on the overlapping structure. The rear suspension splash guard is additionally arranged on the sub-frame so that adverse effect on suspension caused by mud and gravel entering the rear suspension installation cavity can be well avoided, and rear suspension splash guard additional installing is economical and practical compared with rear suspension assembly replacing.

The invention relates to the technical field of electric porcelain insulators, in particular to an electric porcelain insulator with a bird repelling device, which repels birds by knocking a first bell 17 and a second bell 18 through an iron ball 24, and after a rotating disc 11 rotates back, a clockwork spring 13 accumulates force again, and the cycle repeats. The birds are repelled by multiple repelling methods, so the flying birds are prevented from falling on the upper end of the electric porcelain insulator or nesting on the electric porcelain insulator, the threat caused by the flying birds is effectively restrained, the normal operation of the electric porcelain insulator is protected from being influenced, and the normal power supply of the power transmission line is ensured. And meanwhile, the birds are expelled from the electric porcelain insulators, so that the birds are protected from being damaged by electric shock, and a force is contributed to ecological environmental protection.

The invention relates to the field of lighthouse generator set, and aims at providing a diesel generating set convenient to demount and mount and suitable for a movable lighthouse. The diesel generating set comprises a bearing vehicle body, and a damper is fixedly arranged on the outer wall of the top of the bearing vehicle body. A compartment is mounted at the top of the damper through a bolt, and a trunk is formed in the rear end of the compartment. Observation windows are formed in the outer walls of the two sides of the compartment, and side window glass plates are fixedly mounted in the observation windows. The bottoms of the outside of the two sides of the compartment are connected with vehicle tail caution lights facing the rear portion of the compartment through bolts. A compartment back door covering the interior of the trunk is arranged on the trunk through a rotary hinge and a diagonal rod. The diesel generating set has the beneficial effects that the diesel generating set is of a minibus-shaped formal structure, mounting of the diesel generating set is achieved, a diesel engine and the generating set are mounted and demounted conveniently by people, effect desired by people is achieve, and heat generated when the diesel engine and the generating set work can be fast reduced.

The invention relates to a grinding and polishing device, in particular to a packaging box grinding and polishing device. The packaging box grinding and polishing device is high in efficiency and uniform in grinding quality. The packaging box grinding and polishing device comprises a bottom frame, an automatic feeding device, a limiting shifting mechanism, an automatic turnover mechanism and the like, wherein a groove is formed in the bottom frame; part of assemblies of the automatic feeding device are fixedly connected to the bottom frame; part of assemblies of the limiting shifting mechanism are fixedly connected to the automatic feeding device; the automatic turnover mechanism is arranged at the groove of the bottom frame; part of assemblies of the automatic turnover mechanism are fixedly connected with the bottom frame; part of assemblies of the automatic clamping device are fixedly connected with the bottom frame; and part of assemblies of the automatic grinding and polishing device are fixedly connected to the automatic clamping device. The packaging box grinding and polishing device has the advantages that the automatic clamping device and the automatic grinding and polishing device arranged in the packaging box grinding and polishing device can guarantee that the quality of a polished wooden box is uniform, and the condition of uneven quality does not exist.

The invention discloses a gas-transfer type frost-resistant and high-temperature-resistant cable, which belongs to the field of cables. A gas-transfer type freeze-resistant and high-temperature resistant cable is provided with a self-drum cladding and an interlayer transfer line. When the temperature is high, the self-drum cladding expands when heated. , to drive the interlayer transfer line to move upward, so that the interlayer protective gas is filled with the self-bulging cladding from the flexible interlayer, which can effectively restrain and slow down the spread of external high-temperature heat into the core layer. At low temperatures, the self-bulging cladding returns to its original state. The interlayer transfer line is folded with each other on the outer surface of the inner sheath to form a temperature isolation layer, which can effectively suppress the leakage of the temperature generated by the cable itself when it is running, and can effectively isolate the low temperature invasion from the outside, thereby effectively ensuring the power transmission of the cable The efficiency is not easily affected by low temperature, and at high temperature, it can effectively prevent the high temperature from the outside from approaching the inner core layer, thereby effectively ensuring the normal power transmission function of the cable.

The invention provides an AMT single-motor hybrid transmission which comprises an engine, a driving motor, an engine input shaft connected with the output end of the engine through a clutch, a motor input shaft connected with the output end of the driving motor through a gear and an output shaft connected with a vehicle transmission shaft, and the output shaft is coaxially connected with the motor input shaft through a first synchronizer, the engine input shaft is in transmission connection with the motor input shaft or output shaft through a gear. In the engine gear shifting process, the engine torque can be compensated through the driving motor, power transmission in the gear shifting process is guaranteed, the problem of power interruption of AMT gear shifting is solved, and the whole vehicle driving feeling is improved. When the electric quantity of the battery is enough and the required power of the whole vehicle is large, the transmission participates in driving, engine transient working conditions are reduced and thus oil consumption is reduced. The problem that reversing cannot be achieved due to the fact that the electric quantity of the non-plug-in hybrid vehicle is not enough after reversing for a long time is solved, and practicability is high. The invention further provides a driving control method of the AMT single-motor hybrid transmission.

The invention discloses a perforating drill bit for orthopedic surgery. The perforating drill bit comprises a drill bit body, wherein an end block is fixed to the top end of the drill bit body, a sleeve sleeves the outer wall of the top end of the end block, a rotating groove is formed in the outer wall of the end block, a side block is fixed to the side wall of the sleeve in a penetrating mode, one end of the side block extends into the rotating groove, a mounting groove is formed in the top end of the end block, and a top spring is arranged in the mounting groove. According to the perforating drill bit, the sleeve, the side block and the end block are designed, the sleeve sleeves the outer wall of the end block, the sleeve and the end block are rotationally connected through the side block, a drill handle and the drill bit body can rotate relative to each other and do not affect each other, the top spring is designed to apply elastic extrusion to a sliding block, the top end of the sliding block is attached to the end face of a transmission block, and power transmission is achieved.

The invention provides an arc suppression switch which includes a base. A first binding post and a second binding post are respectively arranged on the two sides of the base. The first binding post is electrically connected with a nearby hinge mount used for hinging a cutter bar. The second binding post is electrically connected with a nearby conductive bayonet mount used for clamping the cutter bar. A cushion mount is arranged between the conductive bayonet mount and the hinge mount. A metal bayonet for clamping the cutter bar is arranged at the upper end of the cushion mount. The metal bayonet is connected in series with an inductor, and then electrically connected with the conductive bayonet mount. The height of the metal bayonet on the cushion mount meets the following condition: when the cutter bar is closed, the cutter bar contacts the metal bayonet of the cushion mount first, and then contacts the conductive bayonet mount. The switch can suppress arcs in the opening / closing process, and is of high safety.

The invention relates to a support changing device for dismantling a shared enclosure structure of adjacent foundation pits and a construction method of the support changing device. The device comprises a first embedded part, a first steel support, a second embedded part, a second steel support and filling structures, wherein the first embedded part is embedded and fixed to the end part, close to the enclosure structure, of a first main body structure in a first foundation pit; the first steel support is horizontally and fixedly connected between the first embedded part and main reinforcements of the enclosure structure; the second embedded part is embedded and fixed at the end part, close to the enclosure structure, of a second main body structure in a second foundation pit; the second steel support is horizontally and fixedly connected between the second embedded part and the main reinforcements of the enclosure structure; and the filling structures are plugged in gaps among the end part of the first steel support, the end part of the second steel support and the main reinforcements of the enclosure structure. The first steel support and the second steel support are oppositely connected to the two sides of the enclosure structure, connection of the structures on the two sides is enhanced through the filling structures, a force transmission system is formed, normal force transmission of the structures is guaranteed, and the safety of foundation pit construction is guaranteed. The device can be dismounted through cutting, and construction is convenient.

The invention provides a double-cylinder pumping device hydraulic oil displacement control method, and further provides a double-cylinder pumping device and pumping equipment. According to the double-cylinder pumping device hydraulic oil displacement control method, from the moment a piston of a first main hydraulic cylinder or a piston of a second main hydraulic cylinder moves and reaches a predetermined position, a cavity with a rod and a cavity without a rod of the first main hydraulic cylinder and a cavity with a rod and a cavity without a rod of the second main hydraulic cylinder are respectively communicated for a first lasting time t1; from the predetermined position, each cavity with a rod and a corresponding cavity without a rod are divided for a second lasting time t3, and therefore hydraulic oil inside communicated cavities is displaced during the time interval which is the difference of the second lasting time t3 and the first lasting time t1. When oil displacement operations are conducted according to an oil displacement mode in the stretching and drawing process of the first main hydraulic cylinder and the stretching and drawing process of the second main hydraulic cylinder, the temperature of the hydraulic oil in the communicated cavities is detected, the first lasting time t1 and / or the second lasting time t3 is adjusted to change the span of the time interval, and therefore requirements for temperatures of working conditions are met. Oil displacement operations in the communicated cavities of the double-cylinder pumping device can be controlled in a relatively optimized mode through the double-cylinder pumping device hydraulic oil displacement control method, the double-cylinder pumping device and the equipment, and therefore the energy saving effect is achieved.