31results about How to "Reduced output torque requirements" patented technology

The invention discloses an RCM mechanism for a mechanical arm of a laparoscopic minimally invasive surgical robot. The RCM mechanism disclosed by the invention comprises a connecting rod I, a connecting rod II, a connecting rod III, a connecting rod IV, a connecting rod V, a connecting rod VI, a linear motion output mechanism I, a linear motion output mechanism II, a rotation output mechanism and surgical instruments, wherein the six connecting rods form double parallelogram mechanisms. According to the RCM mechanism, motions of the surgical instruments including linear displacement freedom degree T, deflection freedom degree P and rotation freedom degree Y are correspondingly realized through the driving actions of the linear motion output mechanism I, the linear motion output mechanism II and the rotation output mechanism respectively; requirements of various freedom degrees to moment / torque of a driving mechanism are reduced through the double parallelogram mechanisms and the manner that the rotary centre axis of the rotation freedom degree Y and the connecting rod II form a certain included angle theta; the connecting rod III is directly pushed and pulled through the linear motion output mechanism II, so that the output moment / torque requirements to a freedom degree driving mechanism are reduced; and thus, the light weight and the miniaturization of the mechanical arm of the laparoscopic minimally invasive surgical robot are realized.

The invention relates to a driving motor front-engine rear-drive automatic mechanical gearbox gear shifting system, in particular to a synchronizer-free gear shifting automatic mechanical gearbox on the basis of few-gear middle shaft active speed regulation, and belongs to the technical field of automobile control. The system comprises an input shaft, an output shaft, driving and driven gears for each gear, a spline hub, an engagement sleeve, a sensor, a speed regulating motor, a speed regulating motor transmission mechanism, a clutch operation mechanism, a gear shifting executing mechanism and a controller. The system realizes the synchronism of the engagement sleeve and a target-gear gear during the gear shifting through the regulation on the input shaft rotating speed under the condition of the motive power interruption of the speed regulating motor, a synchronizer with high requirements on materials is omitted, the cost is favorably reduced, and meanwhile, the problem that the starting and acceleration performance and the relative high-speed running of a small-size pure electric automobile cannot be simultaneously considered can be favorably solved.

The invention relates to a front-engine rear-drive automatic mechanical transmission case shifting system for a driving motor, in particular to a synchronizer-free shifting automatic mechanical transmission case for regulating the speed of an intermediate shaft based on a small quantity of gears, belonging to the technical field of automobile control. The system comprises an input shaft, an intermediate shaft, an output shaft, driving and driven gears for each gear, a splined hub, a jointing sleeve, a sensor, a speed regulating motor, a speed regulating motor transmission mechanism, a clutch operating mechanism, a shifting executing mechanism and a controller. According to the system, the rotating speed of the intermediate shaft is regulated through the speed regulating motor, so that synchronization of the jointing sleeve and a target gear during shifting is realized, a synchronizer with high material requirements is eliminated, reduction in the cost is facilitated, and the effect of compatibility among startup, accelerating performance and relatively high-speed running of a small-sized pure electric automobile is realized simultaneously.

In the invention, the power system consists of an engine, an integrated starting generator, a starter and a controller. The controller is made up of a main control module and power control modules of the integrated starting generator and the starter, a temperature probe and a pair of the voltage sensors connected with the main control module separately. The control method comprises the following steps of sending self-checking command via the controller; detecting whether the power control module of the integrated starting generator is normal or not to determine the running mode of the integral car via the controller; detecting the ambient temperature via the controller; detecting the voltage and the quantity of electricity output by the power battery to determine the starting engine mode via the controller; waiting for starting order via the controller and running of the integral car after starting the engine.

The invention provides a one-way spiral half soil compaction drill bit which comprises a hollow connecting rod. One end of the connecting rod is provided with a flange plate and a drill tip is arranged close to the other end of the connecting rod. The hollow connecting rod is sequentially and coaxially sleeved with a lower spiral compaction expanding body, a non-closed compaction expanding body and an upper soil conveying auger stem from the end close to the drill tip to the end provided with the flange plate. The drill tip is connected to the end of the lower spiral compaction expanding body, spiral compaction expanding blades are arranged on the outer wall of the lower spiral compaction expanding body, upper spiral soil conveying blades with the spiral direction identical to that of the spiral compaction expanding blades are arranged on the outer wall of the upper soil conveying auger stem, the outer diameter of each compaction expanding blade is identical to that of each upper spiral soil conveying blade and is D1, the maximum outer diameter of the non-closed compaction expanding body is D2, the maximum outer diameter of the lower spiral compaction expanding body is D3, and an inequation D3<D2<D1 is satisfied. According to a one-way spiral half soil compaction pile construction technology and the one-way spiral half soil compaction drill bit applied to the technology, foundation piles which are high in bearing capacity, low in cost, green and environmentally friendly can be constructed, the drill bit and the technology are suitable for various complex stratums including a hard rock stratum, and the phenomena of the compaction negative effect, pile body lateral displacement and the like are effectively reduced.

The invention belongs to the field of mechanical-electrical integration, particularly relates to a stair climbing robot with a planetary gear train, and mainly solves the problems that a conventional stair climbing robot is low in transmission efficiency, difficult to deform, slow in movement, poor in structural stability and the like. The stair climbing robot with the planetary gear train comprises a transmission system, a changeover system and an executive system, wherein the transmission system comprises a left transmission group and a right transmission group, and the left transmission group and the right transmission group are in parallel and are symmetrically mounted by using a longitudinal center line as a symmetric center; the changeover system comprises four changeover groups, wherein the four changeover groups are separately arranged in four directions of a bottom plate, and each of the changeover groups consists of a sun gear shaft, a long sleeve, a shaft coupling, an electromagnetic clutch and a bearing; the executive system consists of four gear group systems, wherein each of the gear group systems comprises an inner triangle plate, an outer triangle plate, three planetary gear shafts, six planetary gear shaft sleeves, three planetary gear blades, a sun gear and a blade bearing.

The invention relates to a gearless counterweight towing oil extractor the motor of which is arranged on the lower part, which fundamentally solves the problems in the prior towing oil extractor of high cost, short service life of wire ropes and poor safety. The technical key points of the gearless counterweight towing oil extractor are as follows: a suspension device is arranged on the top of a frame; a pumping rod and a counterweight are suspended on both sides of a head sheave through suspended wire ropes; a driving sheave of a tractor and a belt pulley of a belt gear which is arranged on a foundation and driven by a magnetoelectric machine are arranged on the same transmission shaft; and one end of a conveying rope on the driving sheave passes by a guide wheel which is fixed on the frame and a movable pulley one which is arranged on the upper part of the counterweight and then is fixed on the top of the frame, and the other end of the conveying rope passes by a movable pulley two which is arranged on the lower part of the counterweight and then is fixed on the foundation. The gearless counterweight towing oil extractor has the advantages of high transmission efficiency, low energy consumption, small volume, light weight and low manufacturing cost, and realizes more convenient assembly and maintenance of a system.

The invention discloses a link-type multi-leg robot which, based on bionic features of quadruped mammals, comprises four sets of foot modules and three-segment frame modules distributed symmetrically on two sides of a frame. The link-type multi-leg robot is characterized in that each foot unit employs a multi-link mechanism having a prismatic pair, and a hip joint, a thigh joint and a knee joint in each foot unit are driven in a transmission manner where an alternating-current permanent magnet synchronous motor and a harmonic reducer are connected; the modular foot design concept may allow foots and the frame to be quickly detached and attached to arrive at different configurations, and accordingly one robot may come with multiple models. The multi-link scaling foot structure used herein allows ratios of force and movement of thigh joints and shank joints to be amplified, and the requirement on motor output torque is lowered. The leg link structure has both high rigidity and bearing capacity. The legs can tolerate driving errors, the rigidity and stability of the whole structure are improved, and the robot is imparted better ability to adapt to complex terrains.

The invention discloses an intelligent man-machine interaction type vehicle accelerator pedal device. The device comprises a pedal rotary shaft system, a control shaft system, a sliding polished shaft system and a clutch shaft system. The pedal rotary shaft system, the control shaft system, the sliding polished shaft system and the clutch shaft system are arranged on a pedal support. The pedal rotary shaft system is used for achieving work states of a common accelerator pedal, the control shaft system transmits power to the clutch shaft system through the sliding polished shaft system, a cylindrical cam, idler wheels and a transmission rod in the clutch shaft system drive a pressing plate to move axially so that the plate-type cam of the control shaft system can achieve feedback control of pedal force after the pressing plate and a friction plate are combined and locked, and an adjusting mechanism in the sliding polished shaft system can adjust the axial position of a sliding gear so that the common accelerator pedal can work when a control motor fails. Besides, control of rotation speed and power of an engine and running speed can be achieved through the common accelerator pedal, running states and road condition information can be fed back to drivers through an accelerator pedal in a tactile feedback mode, man-machine interaction is achieved, and the drivers are assisted in improving driving behaviors.

The invention discloses a stretching component of elevator devices, and comprises a plurality of supporting bodies that have clad and support core wires and an including body that includes the supporting body, wherein, the including body takes a shape of a flat zonal body structure, and the width of the including body is at least larger than the thickness of the including body; the clad of the supporting body and the including body are made of non-metallic materials, and the supporting body and the including body can move relatively. The stretching component of the invention can eliminate the deformation influence of the including body, improves the service life of the stretching component, has the advantages of simple structure, long service life and good friction property, etc., and leads elevator systems to be more flexible.

The invention discloses an overturning hopper. The overturning hopper comprises a hopper body, a hopper revolving support and an overturning mechanism, wherein the overturning mechanism comprises a link and a crank, one end of the link is hinged onto the hopper body, the other end of the link is hinged with the crank, and the other end of the crank is hinged onto a crank revolving support through a crank rotary shaft; and the receiving point and the unloading point of the hopper are both arranged at or close to the dead point of the overturning mechanism through optimizing the starting point and the ending point of the crank, so that the impacted force working condition of speed reducer equipment is optimized during the loading and the unloading of the overturning hopper. According to the mechanism, the centre-of-gravity position of the hopper body and the centre-of-gravity position of the hopper after the loading are further optimized, so that the centre of gravity of the hopper body is located between the revolving hinge point of the hopper and the supporting hinge point of the link and close to the revolving hinge point of the hopper; and requirements on the output torque of a speed reducer are greatly lowered by virtue of the force amplification effect of the link, so that the weight of the speed reducer equipment and the power of a tilting motor are greatly reduced, and the motor power and the energy consumption of the system are saved.

The invention provides an electric adjustable jack which comprises a jack head assembly, a lifting assembly, a power transmission assembly and a base assembly. An automatic locking assembly is located in the lifting assembly. Compared with a straight rod shaped lifting assembly of a traditional scissor jack, when the lifting assembly with the bent state lifts an identical object to the same height, torque needing to be output by a motor is smaller, the lifting assembly can be adjusted to the ideal state according to the requirement of the application environment, the requirement of a jack for the torque output by the motor is lowered, and the lifting capacity of the jack can be improved temporarily, so that the jack adapts to the more narrow working environment, and meanwhile the jacking range of the jack is greatly enlarged.

The invention discloses a stretching component of an elevator device, which comprises a plurality of carrying bodies of bearing core threads provided with coating layers, and an enclosing body for enclosing the carrying bodies; wherein, the outer appearance of the enclosing body adopts a flat strap-shaped structure, and the width size of the inclosing body is at least larger than the thickness size thereof; the coating layers and the enclosing body of the carrying bodies are made of non-metal material, the carrying bodies are adjacently arranged, the relative motion can be performed between adjacent carrying bodies, as well as between the carrying bodies and the enclosing body. The invention also discloses the elevator device adopting the stretching component. The stretching component can eliminate the deformation of the enclosing body, and the service life of the stretching component is enhanced; the stretching component has the advantages that the structure is simple, the service life is long, and the friction characteristics are good, and meanwhile the arrangement of an elevator system is more flexible.

The invention relates to an elevator tractor which comprises a synchronous motor, a speed reducing box, a traction wheel and an electromagnetic brake, wherein the electromagnetic brake comprises a brake wheel and a brake shoe which are matched with each other for braking; the synchronous motor comprises a main motor body and an outer rotor; and the brake wheel is integrated on the outer rotor and is positioned between the main motor body of the synchronous motor and the speed reducing box. Compared with an asynchronous geared tractor, the elevator tractor can work at lower rotating speed and is lower in noise; a helical gear is adopted by the elevator tractor in a matching way and is taken as a speed reducing mechanism of a transmission part, so that the whole transmission efficiency of the elevator tractor can be improved; the speed reducing box is arranged, so that the requirement on the output torque of the synchronous motor can be reduced, the cost increase of an elevator caused by the facts that larger moment is output by the synchronous motor and a great deal of magnetic steel is needed to be used is avoided; an input end of the speed reducing box is braked, so that the braking moment is small, and the requirement on the brake is low; and meanwhile, by adopting a structure integrating a brake disc, a coupler and the outer rotor of the motor, the elevator tractor is compact in structure and meets the using requirement of a small machine room elevator.

A high frequency large flow 2D digital servo valve comprises a valve body, a mulitpolar AC servo motor, a moment amplifying mechanism, a valve plug and a valve sleeve, the output shaft of the mulitpolar AC servo motor is connected with the input end of the moment amplifying mechanism, the output end of the moment amplifying mechanism is fixedly connected with the front end of the valve plug, the valve sleeve is sealed in the valve body, the valve plug is rotationally installed in the valve sleeve, the left end of the valve plug, the valve sleeve and a back cover plate construct a sensitivity chamber, the surface of ledges of the valve plug in the sensitivity chamber is respectively provided with a high pressure hole and a low pressure hole which are arranged in axial symmetry, both the high pressure hole and the low pressure hole are of bow shape, the bowstring of the high pressure hole and that of the low pressure hole are parallel, the inner surface of the valve sleeve outside the sensitivity chamber is provided with a pair of spiral grooves in axial symmetry, one end of the pair of spiral grooves is communicated with the sensitivity chamber, and the other end thereof covers thearea between adjacent high pressure hole bowstring and low pressure hole bowstring. The invention has excellent dynamic response property, is suitable to work under state of large flow, and has simple structure, high precision and strong anti-pollution capacity.

The invention provides a pure electric vehicle and a powertrain system, comprising a housing, an electric motor, a first planetary row, a transmission mechanism and a control shifting device. A firstplanetary row includes three first rotating elements, one of the three first rotating elements controls the shifting device and the housing, the output shaft of the motor is connected to control the selective operation of the shifting device so as to realize braking or rotation, and the other two of the three first rotating elements are respectively connected with the output shaft of the motor andthe input ends of the transmission mechanism one by one; The output end of the transmission mechanism is used for driving and connecting to the wheel end of the automobile. The transmission mechanismhas a two-step ratio of less than 2, so that the torque demand of the motor can be reduced and the output torque of the wheel end of the automobile can be increased, and the ride comfort of the vehicle can be ensured; moreover, the whole structure of the transmission mechanism is compact, the integration level is high, the control is simple and the cost is low.

The invention discloses a stretching component of an elevator device, which comprises a plurality of carrying bodies of bearing core threads provided with coating layers, an enclosing body for enclosing the carrying bodies, and a plurality of protective sleeves between the enclosing body and the carrying bodies; wherein, the outer appearance of the enclosing body adopts a flat strap-shaped structure, and the width size of the inclosing body is at least larger than the thickness size thereof; the coating layers and the enclosing body of the carrying bodies are made of non-metal material; the carrying bodies are enclosed by the protective sleeves; and the protective sleeves and the enclosing body can move relatively. The invention also discloses the elevator device adopting the stretching component. The stretching component can eliminate the deformation of the enclosing body, and the service life of the stretching component is enhanced; the stretching component has the advantages that the structure is simple, the service life is long, and the friction characteristics are good, and meanwhile the arrangement of an elevator system is more flexible.

The invention provides a one-way spiral half soil compaction drill bit which comprises a hollow connecting rod. One end of the connecting rod is provided with a flange plate and a drill tip is arranged close to the other end of the connecting rod. The hollow connecting rod is sequentially and coaxially sleeved with a lower spiral compaction expanding body, a non-closed compaction expanding body and an upper soil conveying auger stem from the end close to the drill tip to the end provided with the flange plate. The drill tip is connected to the end of the lower spiral compaction expanding body, spiral compaction expanding blades are arranged on the outer wall of the lower spiral compaction expanding body, upper spiral soil conveying blades with the spiral direction identical to that of the spiral compaction expanding blades are arranged on the outer wall of the upper soil conveying auger stem, the outer diameter of each compaction expanding blade is identical to that of each upper spiral soil conveying blade and is D1, the maximum outer diameter of the non-closed compaction expanding body is D2, the maximum outer diameter of the lower spiral compaction expanding body is D3, and an inequation D3<D2<D1 is satisfied. According to a one-way spiral half soil compaction pile construction technology and the one-way spiral half soil compaction drill bit applied to the technology, foundation piles which are high in bearing capacity, low in cost, green and environmentally friendly can be constructed, the drill bit and the technology are suitable for various complex stratums including a hard rock stratum, and the phenomena of the compaction negative effect, pile body lateral displacement and the like are effectively reduced.

In the invention, the power system consists of an engine, an integrated starting generator, a starter and a controller. The controller is made up of a main control module and power control modules of the integrated starting generator and the starter, a temperature probe and a pair of the voltage sensors connected with the main control module separately. The control method comprises the following steps of sending self-checking command via the controller; detecting whether the power control module of the integrated starting generator is normal or not to determine the running mode of the integral car via the controller; detecting the ambient temperature via the controller; detecting the voltage and the quantity of electricity output by the power battery to determine the starting engine mode via the controller; waiting for starting order via the controller and running of the integral car after starting the engine.

The embodiment of the invention discloses a brake-by-wire system for an automobile. The system involves a master controller, a brake pedal, a brake pushrod, a fully decoupled brake simulator, an actuator front shell body, an actuator rear shell body, a normally closed solenoid valve, an anti-locking device, a first brake, a second brake, a third brake, a fourth brake, a displacement sensor, a first ball bearing, a second ball bearing, a third ball bearing, a fourth ball bearing, a first speed reducing and torque increasing mechanism, a second speed reducing and torque increasing mechanism, a first power assisting motor, a second power assisting motor, a first brake master cylinder, a second brake master cylinder, a first normally open solenoid valve, a second normally open solenoid valve,a first pressure sensor, and a second pressure sensor. According to the scheme provided by the brake-by-wire system, the problem of invalid braking force caused by the failure of a certain part of a power assisting mechanism in the travelling process of the automobile can be avoided, the response speed of the brake-by-wire system for the automobile is improved, and the control difficulty of the stability of the brake-by-wire system is reduced.

The invention provides a drive device, drive method and control device of an operation window of a ventilation cabinet. The drive device comprises an output shaft, a first-stage straight gear, a second-stage straight gear, a drive module and a fixing module. The output shaft is arranged on a center shaft of the ventilation cabinet in a sleeving manner and used for driving the center shaft to rotate. The first-stage straight gear is arranged on the output shaft in a sleeving manner and used for driving the output shaft to rotate. The second-stage straight gear is engaged with the first-stage straight gear and used for driving the first-stage straight gear to rotate. The drive module cooperates with the second-stage straight gear and is used for driving the second-stage straight gear to rotate. The fixing module is connected with the drive module and used for fixing the drive module to the top end of the ventilation cabinet. According to the drive device, the two stages of straight gearsare adopted for driving the center shaft on the ventilation cabinet, the two stages of straight gears achieve the aim of cooperating with different ventilation cabinets through the later changeable reduction ratio and good adaptability, and the drive device is suitable for most ventilation cabinets in the market and is wide in application range.

The invention discloses an unmanned aerial vehicle attitude control system with variable-angle fan blade control surfaces. The control system comprises a main body and control surface systems arrangedon two sides of the main body, the main body comprises a carbon fiber base, a brushless motor and rotors, each control surface system comprises a bracket, a control surface group, a connecting rod and a steering engine mechanism, and the invention relates to the technical field of aircraft attitude control. Compared with variable pitch adjustment, the unmanned aerial vehicle attitude control system with the variable-angle fan blade control surface is simple in structure, small in axial size and low in production and maintenance difficulty and cost; compared with vector adjustment, the controlsystem has the characteristics that the stability and rapidity are better, the requirement for the output torque of a steering engine is not high, in other words, control can be achieved through thesmall steering engine, and the weight is reduced; compared with sliding flow rudder adjustment, the control system has the advantages that the adjustment effect is good, the windward side is small, and the anti-interference capacity is higher; and efficient and stable control of the fixed double rotors is realized, the flexibility is higher, the stability is better, and the control system is moresuitable for take-off and landing control of VTOL and STOVL aircrafts.

The invention discloses a full-hydraulic down-hole rotating impact combined drill bit for pilling a rock and soil layer. The full-hydraulic down-hole rotating impact combined drill bit comprises a rotary power unit and a combined hydraulic impact hammer unit, wherein working torque of the rotary power unit in the full-hydraulic down-hole rotating impact combined drill bit is output by a hydraulic motor or a hydraulic speed reducer through a gear group, meanwhile, the hydraulic motor or the hydraulic speed reducer drives a hollow shaft, a hydraulic oil rotary joint and the combined hydraulic impact hammer unit to rotate, and thus rotary grinding is realized; meanwhile, impact power of the combined hydraulic impact hammer unit in the full-hydraulic down-hole rotating impact combined drill bit is output by a hydraulic hammer and is transmitted to an alloy-embedded hammer plate on an impact hammer fixing main body, the impact power of the alloy-embedded hammer plate directly acts on a rock layer, and thus impact crushing is realized; through the simultaneous action of the rotary grinding and the impact crushing, quick excavation construction is realized.

The invention discloses an intelligent man-machine interaction type vehicle accelerator pedal device. The device comprises a pedal rotary shaft system, a control shaft system, a sliding polished shaft system and a clutch shaft system. The pedal rotary shaft system, the control shaft system, the sliding polished shaft system and the clutch shaft system are arranged on a pedal support. The pedal rotary shaft system is used for achieving work states of a common accelerator pedal, the control shaft system transmits power to the clutch shaft system through the sliding polished shaft system, a cylindrical cam, idler wheels and a transmission rod in the clutch shaft system drive a pressing plate to move axially so that the plate-type cam of the control shaft system can achieve feedback control of pedal force after the pressing plate and a friction plate are combined and locked, and an adjusting mechanism in the sliding polished shaft system can adjust the axial position of a sliding gear so that the common accelerator pedal can work when a control motor fails. Besides, control of rotation speed and power of an engine and running speed can be achieved through the common accelerator pedal, running states and road condition information can be fed back to drivers through an accelerator pedal in a tactile feedback mode, man-machine interaction is achieved, and the drivers are assisted in improving driving behaviors.

The invention relates to a driving motor front-engine rear-drive automatic mechanical gearbox gear shifting system, in particular to a synchronizer-free gear shifting automatic mechanical gearbox on the basis of few-gear middle shaft active speed regulation, and belongs to the technical field of automobile control. The system comprises an input shaft, an output shaft, driving and driven gears for each gear, a spline hub, an engagement sleeve, a sensor, a speed regulating motor, a speed regulating motor transmission mechanism, a clutch operation mechanism, a gear shifting executing mechanism and a controller. The system realizes the synchronism of the engagement sleeve and a target-gear gear during the gear shifting through the regulation on the input shaft rotating speed under the condition of the motive power interruption of the speed regulating motor, a synchronizer with high requirements on materials is omitted, the cost is favorably reduced, and meanwhile, the problem that the starting and acceleration performance and the relative high-speed running of a small-size pure electric automobile cannot be simultaneously considered can be favorably solved.

The invention provides a base hinge point position self-adjusting six-degree-of-freedom neck part flexible exoskeleton system which has a power-assistance function, replaces a wearer to bear the weight and inertia, relieves a heaviness sense, a restriction sense and a foreign body sensation brought to the wearer by a load, improves the flexibility of connection between the wearer and the base hinge point position self-adjusting six-degree-of-freedom neck part flexible exoskeleton system, and has a head position and pose detection function. The base hinge point position self-adjusting six-degree-of-freedom neck part flexible exoskeleton system comprises a base bottom plate; unit brackets are arranged on the base bottom plate through base hinge point position adjusting mechanisms; servo motors and steel rope windings are arranged on the unit brackets; universal pulleys are rotationally arranged on the unit brackets; three compound spherical hinges are uniformly distributed on a load mounting platform in the circumferential direction; each of an inner ear and an outer ear of each compound spherical hinge is connected with one steel rope winding through a steel rope correspondingly; joint space force detection units are connected with the steel ropes in series; rotating speed and corner sensors are arranged on the servo motors; outputs of the joint space force detection units and the rotating speed and corner sensors are connected with a control unit; and an output of the control unit is connected with the servo motors.

The invention provides an electric adjustable jack which comprises a jack head assembly, a lifting assembly, a power transmission assembly and a base assembly. An automatic locking assembly is located in the lifting assembly. Compared with a straight rod shaped lifting assembly of a traditional scissor jack, when the lifting assembly with the bent state lifts an identical object to the same height, torque needing to be output by a motor is smaller, the lifting assembly can be adjusted to the ideal state according to the requirement of the application environment, the requirement of a jack for the torque output by the motor is lowered, and the lifting capacity of the jack can be improved temporarily, so that the jack adapts to the more narrow working environment, and meanwhile the jacking range of the jack is greatly enlarged.

The invention discloses a stretching component of elevator devices, and comprises a plurality of supporting bodies that have clad and support core wires and an including body that includes the supporting body, wherein, the including body takes a shape of a flat zonal body structure, and the width of the including body is at least larger than the thickness of the including body; the clad of the supporting body and the including body are made of non-metallic materials, and the supporting body and the including body can move relatively; the supporting body is arranged along the horizontal direction at intervals. The stretching component of the invention can eliminate the deformation influence of the including body, improves the service life of the stretching component, has the advantages of simple structure, long service life and good friction property, etc., and leads elevator systems to be more flexible.