112results about How to "Guaranteed self-locking" patented technology

The invention discloses a self-locking type pole-climbing robot. The self-locking type pole-climbing robot comprises an upper locking portion, a lower locking portion and a counterweight portion; the upper locking portion and the lower locking portion are in hinge connection; when the self-locking pile-climbing robot works, the lower locking portion is obliquely arranged below the upper locking portion, the counterweight portion is fixed on the lower locking portion, the upper locking portion and the lower locking portion can achieve self-locking relative to a cylinder pole under the function of the counterweight portion and accordingly the robot can climb on the cylinder pole. According to the self-locking type pole-climbing robot, the positive pressure of arc-shaped driving wheels relative to the cylinder pole is provided by the dead load of a mechanism and accordingly the robot can carry heavier articles and stably climbs on the cylinder pole; when the diameter of the cylinder pole is changed, an arranged pull pressure sensor can reflect the change in the positive pressure value in real time, a direct current servo motor is driven to change the distance between the two arc-shaped driving wheels according to the fact that whether a value of the measuring force is within a set threshold value range or not, then the positive pressure value is changed, self-locking of the robot relative to the cylinder pole is guaranteed, and the robot can be adapted to different diameters.

The invention discloses a wheel type mechanism of which the radius can be adjusted. The wheel type mechanism comprises a wheel formed by a plurality of wheel spokes, wherein the wheel comprises the wheel spokes, and further comprises a radius adjusting assembly and a motor driving assembly; the wheel spokes are arranged on the left side and the right side; more than three wheel spokes on each side are uniformly distributed on the periphery and are positioned at the same radius positions; the motor driving assembly comprises a dual-output shaft motor which is arranged in the center of the wheel and is mounted through a wheel frame, wherein driving bevel gears are respectively mounted on the left output shaft and the right output shaft of the dual-output shaft motor; the radius adjusting assembly comprises screw rods, nuts, guiding rails and sliding bases, which are arranged corresponding to each of the wheel spokes; the guiding rails are radially arranged on the wheel frame; each of the wheel spokes is mounted on the corresponding guiding rail through the corresponding sliding base; the screw rods are radially arranged; the nuts are screwed with the corresponding screw rods and mounted on the corresponding wheel spokes; driven bevel gears at the inner ends of the screw rods are meshed with the corresponding driving bevel gears. The wheel type mechanism disclosed by the invention can adapt to different complex terrains, the sense of undulating and the sense of impact when the wheel travels are reduced, and the obstacle crossing capacity of the wheel is improved.

The invention relates to a single-degree-of-freedom occlusion robot applied to food and dental monitoring. The robot comprises a static platform, a power device and a transmission device; the power device and the transmission device are in transmission connection with each other and are both arranged at the upper end of the static platform, an upper jaw fixed platform and a lower jaw adjustable platform are further up and down oppositely arranged at the upper end of the static platform, an upper jaw mounting platform is rotatably connected with the transmission device, and the lower jaw adjustable platform is slidingly connected with the static platform; the lower jaw adjustable platform includes a sliding flat plate, the upper end of the sliding flat plate is provided with a lower jaw mounting platform, and the lower jaw mounting platform is connected with the sliding flat plate through a platform lifting assembly; the upper jaw fixed platform and the jaw mounting platform are also provided with monitoring systems. The robot can simulate the occlusion process of teeth, the deformation state of food in the occlusion process is observed, the force bearing condition of a tooth modelis monitored through the monitoring systems, and therefore for different kinds of food, the whole force bearing conditions of the teeth in the occlusion process can be detected and analyzed.

The invention relates to a manipulator technology, and provides a wrist rotating clamp structure for a hydraulic manipulator. The structure comprises a linear oil cylinder, a micro hydraulic motor, aspeed reducing mechanism and a pawl; the linear oil cylinder is arranged by adopting a rear mode; the micro hydraulic motor and the speed reducing mechanism are positioned between the linear oil cylinder and the pawl; an output shaft of the micro hydraulic motor is connected to the speed reducing mechanism, and is vertically staggered with a piston rod of the linear oil cylinder; a worm wheel output shaft of the speed reducing mechanism is of a hollow structure; the piston rod of the linear oil cylinder is connected to a driving mechanism of the pawl after penetrating through the worm wheel output shaft, and drives opening or closing thereof; and the micro hydraulic motor drives the pawl to realize forward-reverse rotation through the speed reducing mechanism. The structure is simple in structure, low in technical difficulty, high in reliability, excellent in maintainability and economy, easy to realize, high in speed reducing ratio, high in wrist rotating torque and low in lowest stable rotating speed, allows staggered arrangement of the hydraulic motor and the pawl to achieve more compact and flexible structure, and has self-locking characteristics on a worm wheel and a worm rod.

The invention relates to a self-adjustable variable buoyancy underwater platform and belongs to the field of ocean monitoring. The platform comprises an emission device, an underwater monitor, a stable plate, a control unit, a battery pack, a pressure-resisting shell, an oil storage tank, a depth sensor, a depth adjusting mechanism, a hydraulic pulse control valve, a bidirectional quantitative hydraulic pump and a motor, wherein the depth adjusting mechanism comprises a connector body, an oil bag end cover, an oil bag and an oil bag protective cover; the platform adopts the motor to drive the bidirectional quantitative hydraulic pump to realize oil injection or oil pumping of the depth adjusting mechanism so as to achieve the self-adjusting function of ascending or descending on the platform; and a hydraulic loop system is internally designed with the hydraulic pulse control valve so that the self-locking performance of a driving motor can be ensured, the inversion in a large-depth ocean environment can be prevented and the whole power consumption of the platform can be reduced.

The invention discloses a four-wheel vehicle mechanism with adjustable eccentricity, which comprises left and right wheels on both sides of the front part of the vehicle body and left and right wheels on both sides of the rear part, and the wheels include a wheel body and a wheel center adjustment assembly , the wheel center adjustment assembly includes a slide plate, a slide block and a drive motor for the slide plate, the slide plate is slidably arranged in the transverse sliding groove covering the wheel center of the wheel body on the back of the wheel body, and is installed through the transverse screw rod below and the transverse guide rod above In place, the screw rod is screwed into the screw hole at the lower part of the slide plate, the guide rod is penetrated through the guide hole at the upper part of the slide plate, and the drive motor of the slide plate is set on one side of the transverse slide groove and connected to the screw rod through a gear transmission pair; The slide block is slidably arranged in an oblique slide groove provided on the diagonal direction of the slide plate, and is installed and connected with the car body through the wheel shaft. The invention can run smoothly on complex terrain, not only reduces the bumping range of the four-wheel vehicle in the running process, but also improves the ability to overcome obstacles.

The invention discloses a wedge-shaped block self-locking top tight device for a ship lift. The top tight device comprises a frame. One side of the frame is fixedly provided with a drive oil cylinder; a piston rod of the drive oil cylinder is connected to one end of a wedge-shaped drive block; a vertical surface of the wedge-shaped drive block faces toward the frame and an inclined surface of the wedge-shaped drive block faces outward; two swing arm supporting seats are fixed on the frame at two sides of the wedge-shaped drive block; the swing arm supporting seats are hinged with two swing arms; the other ends of the swing arms are co-axially hinged with two sides of a wedge-shaped top tight block; a top tight surface of the wedge-shaped top tight block faces outward; an inclined surface of the wedge-shaped top tight block is contacted with the inclined surface of the wedge-shaped drive block; and a chamfered angle of the wedge-shaped drive block and the wedge-shaped top tight block is smaller than a frictional angle of a friction surface. The self-locking characteristic of the wedge-shaped block guarantees that a ship tank is in a reliable locking state under the effect of horizontal load; and the horizontal longitudinal load of the ship tank are transmitted to a track through the wedge-shaped block self-locking top tight device for the ship lift. The wedge-shaped block self-locking top tight device for the ship lift is convenient for operation, has high reliability, and can be widely applied in the field of water conservancy and hydroelectricity engineering ship lifts.

The invention discloses a transmission type anchoring device which comprises a lifting device, an anchoring board and a baffle, wherein the lifting device connects with the anchoring board, the baffle lies beneath the anchoring board. The lifting device comprises a rack, a worm wheel, a worm, a pinion and a rocker, the rack is fixed on a mechanical equipment which is to be anchored; the worm wheel and the worm engage with each other to compose a speed reducing mechanism, the worm and the rocker connect with each other and are fixed on the external hood of the lifting device; the worm wheel and the pinion are integrated to engage with the worm and the rack respectively. When the anchoring board needs to be lifted, the rocker will be rocked, the worm in the lifting device will rotate to drive the worm wheel to rotate, and the pinion will rotate subsequently, the rack will not move for the reason of being fixed on the mechanical equipment to be anchored, so that the anchoring board will be lifted upward. The worm wheel and worm transmission structure can be used for ensure self-locking after the anchoring board being lifted.

A high-voltage line maintenance device of chain-driven lifting type substation system comprises a traveling frame, a power mechanism, a chain lifting mechanism and a telescopic rod hitching mechanism.The high-voltage line maintenance device comprises a traveling frame, a power mechanism, a chain lifting mechanism and a telescopic rod hitching mechanism. The traveling car frame plays a supportingrole, the chain lifting mechanism is located in front of the traveling car frame, the power mechanism is installed in the middle of the car frame, and the power is transmitted to the chain transmission mechanism through the bevel gear after the worm gear reducer reduces the speed. The worm gear reducer is used to realize the self-locking function of the lifting device, and a limited position frameis set to limit the lifting device. The high-voltage line maintenance device of chain-driven lifting type substation system replaces the work of directly connecting the earthing wire with the hand-held telescopic rod, thus avoiding the direct contact between the worker and the earthing device and ensuring the safety of the worker.

The invention provides a self-locking hydraulic variable-diameter threshing cylinder and a combine harvester. The self-locking hydraulic variable-diameter threshing cylinder comprises a diameter adjusting device, a hydraulic transmission device, a hydraulic pump station and a signal acquisition control system, and the diameter adjusting device is located at the inner sides of supporting radial discs at the two sides of a threshing cylinder body; and the hydraulic transmission device transmits power to the diameter adjusting device. The cylinder threshing diameter can be steplessly adjusted through the diameter adjusting device; and a controller continuously adjusts the opening degree of three-position four-way electromagnetic proportional reversing valves based on real-time feedback signals of displacement sensors to control the input and output flow of hollow hydraulic cylinders, it is guaranteed that piston rods of the two hollow hydraulic cylinders synchronously move, and the diameter of the threshing cylinder body is synchronously adjusted in real time. After the diameter of the threshing cylinder body is adjusted, the threshed cylinder diameter can be effectively locked, and the operation stability of the threshing cylinder body is guaranteed. The working performance of the combine harvester can be effectively improved.

The invention discloses a solar following system. The solar following system comprises a driving device, a transmission device, a collection device, a first detection device, a second detection device and a control device. The invention also discloses a control method of the solar following system. When the system operates for the first time, the control device controls the collection device to automatically rotate. When the first detection device on the collection device receives an alignment light source, the collection device stops to rotate. When the illuminating angle of the sun is changed, the control device compares the angle position of the second detection device detecting the alignment light source with the angle device of the collection device, judges forward and backward rotation conditions of the driving device and drives the collection device to rotate through the driving device. When the first detection device on the collection device sends an instruction to the control device again, the collection device stops to rotate so as to allow the collection device to rotate along with the light source. Thus, a problem of low conversion efficiency of a solar system in the prior art is solved, and compared with the traditional fixed photovoltaic conversion rate of 10%-15%, the conversion rate is improved by around 22%.

The invention discloses a working fluid tank door for a large-sized electrical discharge machining tool; the working fluid tank door comprises a tank body, a tank door of the tank body includes an upper door and a lower door, the lower end of the upper door is connected to the upper end of the lower door, the lower end of the lower door is provided with a hinge hinged to a base of the tool, the left and right ends of the upper door are connected with hydraulic driving mechanisms respectively; the hydraulic driving mechanisms drive the tank door to open or close. The working fluid tank door has the advantages of compact structure, small operation spatial range, good opening-closing stability of the tank door, good convenience of opening and closing, good convenience of sealing, availability for self-locking, low energy consumption and the like.

The invention discloses a cavity filter, which comprises a cavity, a cover board and a tuning self-locking bolt, wherein the cover board is used for closing the cavity of the cavity filter; the cover board comprises a cover board body; the cover board body is made of an aluminum product; a tuning threaded hole is formed in the cover board body and specifically is a lug boss which extends towards the direction of the cavity and is molded integrally with the cover board body; the tuning self-locking bolt is divided into a head part and a rod part and is fabricated by copper; the head part is arranged at one end of the bolt; the rod part is arranged at the other end of the bolt; two sets of threads are arranged on the head part of the bolt to form screws; the upper and lower two sets of threads are the same in diameter L and screw pitch P; and the diameter of the part between the two threads is 40%-70% that of the rod part. The cavity filter disclosed by the invention has the advantages of low cost and tuning performance.

The invention relates to the technical field of a camera device, and more particularly, to a schlieren cylinder protection apparatus and the schlieren cylinder, comprising: a left baffle plate, a right baffle plate, a left rotation ball screw, a right rotation ball screw, a coupling device, a guide rail, a hand wheel and a servo motor. The bottoms of the left baffle plate and the right baffle plate are provided with a plurality of guide rail sliding blocks distributed uniformly. The guide rail sliding blocks are sleeved on the guide rail. The top parts of the left baffle plate and the right baffle plate are provided with at least one screw sliding block arranged uniformly. The screw sliding block in connection with the left baffle plate is sleeved on the left rotation ball screw; and the screw sliding block in connection with the right baffle plate is sleeved on the right rotation ball screw. According to the invention, through the left baffle plate and the right baffle plate arranged inside the case body and through the transmission mode of the rotation ball screw and the servo motor, the schlieren cylinder protection apparatus can be adjusted freely in the short time within its starting or closing time to meet the requirement of schlieren cylinders of different sizes, especially of the large size on the time.

The invention disclosed a pull-type elevating mechanism which comprises a fixed pipe, a self-locking mechanism and a pull cord, wherein the self-locking mechanism comprises an upper wedge-shaped blockand a lower wedge-shaped block which can move up and down and can be arranged in the fixed tube, the upper and lower wedge-shaped blocks can match with each other and move without separation, and theupper wedge-shaped block is fixedly connected with a support part passing through the fixed tube and arranged outside the fixed tube. One end of the pull cord is connected with the top of the upper wedge-shaped block, and the other end of the pull cord is connected with the bottom of the lower wedge-shaped block. Under the action of gravity of the self-locking mechanism, the upper wedge-shaped block and the lower wedge-shaped block move close to each other longitudinally and expand laterally so as to support against the inner wall of the fixed tube for self locking; and under the tension action of the pull cord, the upper wedge-shaped block and the lower wedge-shaped block move against each other longitudinally for releasing self locking, and the height of a shower head can be adjusted bypulling the pull cord up and down.

The invention discloses a corrugated steel web positioning method and an adopted bidirectional adjusting and positioning device. The corrugated steel web positioning method comprises the following steps of S1, mounting the bidirectional adjusting and positioning device of a corrugated steel web at a fixed end die; S2, obliquely hoisting the corrugated steel web into the die according to a designedslope; S3, adjusting and positioning the corrugated steel web at the fixed end die side in height direction and transverse direction of a bridge; and S4, adjusting and positioning the corrugated steel web 1 at a matched beam side opposite to the fixed end die side in height direction and transverse direction of the bridge. The corrugated steel web positioning method is convenient and quick to position, can reduce influence of external factors such as wind power and is more accurate and reliable to position.

The invention discloses a mechanical balance valve with a foldable cantilever crane. The mechanical balance valve comprises a first oil port, a second oil port, a valve body, a control valve core, a balance valve core, a high-pressure cavity and low-pressure cavity isolating block and an overflow valve core, wherein the valve body is provided with a pilot control oil cavity, a load cavity and a pilot valve spring cavity; the first oil port is communicated with the pilot control oil cavity; the second oil port is communicated with the load cavity; the control valve core is arranged in the pilot control oil cavity; the balance valve core is arranged in the load cavity; the pilot control oil cavity is isolated from the load cavity; the balance valve core comprises a valve head and a valve rod; the valve head is arranged at one end, which faces the control valve core, of the valve rod; the valve rod passes through a center hole of the high-pressure cavity and low-pressure cavity isolating block; a spring is arranged between the valve head and the high-pressure cavity and low-pressure cavity isolating block; a through hole is formed in the center of the valve rod; a small pilot valve core is arranged in the hole; the small pilot valve core is provided with a groove which is communicated with the load cavity and a high-pressure unloading cavity. The mechanical balance valve has the advantages of high dynamic stability, low control pressure and high locking property.

The invention discloses a pneumatic hydraulic damping device of a turnover workbench. A bed body of the gas-liquid damping device is fixedly connected with a supporting seat, a rotation supporting shaft is fixed to the workbench, and the workbench is rotationally connected to the supporting seat through the rotation supporting shaft. A rotation seat is fixedly connected to a slide block of a linear guide rail pair arranged on the bed body. A pneumatic hydraulic cylinder is arranged on a guide rail seat, the rotation seat is connected with the end of a rod of the pneumatic hydraulic cylinder, one end of a connection rod is hinged to the rotation seat, and the other end of the connection rod is hinged to the workbench. The pneumatic hydraulic cylinder is connected with a pneumatic hydraulicdamping device body which provides hydraulic oil for the pneumatic hydraulic cylinder through a speed control valve and an oil pipe, the pneumatic hydraulic cylinder pushes the rotation seat to move,angle displacement of the workbench is generated through the connection rod, and the workbench is adjusted to stations of +90 degrees, -90 degrees and 0 degree through a limiting device. The hydraulicoil has incompressibility, the flowability of the hydraulic oil is lower than that of gas, thus, the stability of angle displacement of the workbench is ensured, the self-locking performance of the workbench after the workbench is turned over in place is also ensured, impaction is low when the workbench is switched between the stations, and the equipment stability and safety are high.

The invention discloses a simple large reversal resistant lifting gear reducer of an automobile seat. The lifting gear reducer comprises a case cover (1), an output gear (2), a planetary gear (4), a cross sliding plate (5), a chute ring (6), an off-axis turbine (7), a rotatory shaft (9) and a gear box (10). By adopting the device composed of the components, during working, a motor drives the off-axis turbine to rotate through a worm to conduct turbine speed reduction movements, and the off-axis turbine drives the planetary gear to conduct small tooth difference speed reduction movements along inner teeth of the output gear; when the output gear tends to reverse under the effect of external force, the cross sliding plate having extremely high self-locking ability for resisting reverse high torque and a mechanism of the chute ring stop the planetary gear from generating reversal; and by combining the technical scheme of turbine speed reduction, the cross sliding plate and a self-locking mechanism resistant to reverse high torque of the chute ring, and large speed ratio of small tooth difference speed reduction, the lifting gear reducer of the automobile seat realizes the purposes of simple structure, low cost and high self-locking ability for resisting the reverse high torque.

A proceeding self-locking device belongs to the technical field of accessories of mobile machinery. Four wheels are fixedly connected onto four corners of the bottom surface of a machine body base plate through a support respectively, a hinged supporting seat I is fixedly connected onto the front portion of the bottom surface of the machine body base plate, two steel wire soft rope limit seats are respectively fixedly connected onto the front end and the rear end of the top surface of the machine body base plate, the front end and the rear end of a steel wire soft rope are fixedly connected a connecting rod II and a control rod respectively, the left end of a main shaft I is fixedly connected with the wheel axle of the left rear wheel, the right end of a main shaft II is fixedly connected with the wheel axle of the front right wheel, two ends of a connecting piece I are movably connected with a connecting rod I and the main haft I, a connecting piece II is movably connected with the connecting rod II and the main shaft II, two ends of the long hinge pin I of the connecting rod I penetrate a limit hole I and a limit hole II respectively, two ends of the long hinge pin II of the connecting rod II penetrate a limit hole III and a limit hole IV respectively, the hole VI of the control rod is movably connected with the hinged supporting seat I, and the control rod and the connecting rod I are movably connected. The proceeding self-locking device can achieve heavy load and avoid the lateral movement, rollover and toppling over of a device on an inclined plane, is simple in structure and easy to operate, and can avoid operational errors more easily.

A manufacturing method of a tuning self-locking screw comprises the following steps of selecting materials; fixedly mounting a manufactured cold upsetting die on cold upsetting equipment; then placing a prepared blank in the cold upsetting die; starting the cold upsetting equipment; setting machining parameters of the cold upsetting equipment, wherein the machining parameters comprise machining temperature, speed and the like; adjusting cold upsetting pressure P of the cold upsetting equipment; starting to carry out cold upsetting machining on the blank; forming at one step during cold upsetting machining; carrying out thread machining on one end of a machined workpiece after cold upsetting machining is finished, wherein two sets of threads are arranged and are not connected, screw pitches P between the upper set of threads and the lower set of threads are the same, the diameters of the upper threads are greater than the diameters of the lower threads, and a part between the two threads is machined until the diameter of the part is 40%-70% of the diameter of a non-machined part of the workpieceafter thread machining is finished; and forming an accommodating groove in the top of one end of each thread after a step seven is finished. Compared with the traditional mode of machining with a numerically-controlled machine tool, the manufacturing method of the tuning self-locking screw saves equipment cost and labor cost, and is better in effect.

The invention discloses a self-locking type pole-climbing robot. The self-locking type pole-climbing robot comprises an upper locking portion, a lower locking portion and a counterweight portion; the upper locking portion and the lower locking portion are in hinge connection; when the self-locking pile-climbing robot works, the lower locking portion is obliquely arranged below the upper locking portion, the counterweight portion is fixed on the lower locking portion, the upper locking portion and the lower locking portion can achieve self-locking relative to a cylinder pole under the function of the counterweight portion and accordingly the robot can climb on the cylinder pole. According to the self-locking type pole-climbing robot, the positive pressure of arc-shaped driving wheels relative to the cylinder pole is provided by the dead load of a mechanism and accordingly the robot can carry heavier articles and stably climbs on the cylinder pole; when the diameter of the cylinder pole is changed, an arranged pull pressure sensor can reflect the change in the positive pressure value in real time, a direct current servo motor is driven to change the distance between the two arc-shaped driving wheels according to the fact that whether a value of the measuring force is within a set threshold value range or not, then the positive pressure value is changed, self-locking of the robot relative to the cylinder pole is guaranteed, and the robot can be adapted to different diameters.

The invention belongs to the technical field of hoisting, and particularly relates to an electric hoist for a single-beam crane. The electric hoist comprises a lifting mechanism speed reducer, a winding drum component, a lifting mechanism electric motor and an operation mechanism speed reducer, wherein a motor shaft is rotationally connected in an electric motor box body, and the motor shaft is insliding connection with a rotor through a spline; the motor shaft is fixedly connected with a first input shaft through an elastic sleeve pin coupling, and an opening is formed in the motor shaft; athird spring is fixedly connected to each of the two ends of the rotor, the rotor is fixedly connected in the electric motor box body which is connected with a machine frame through a screw, a fan brake wheel is fixedly connected to a support ring, a brake ring is fixedly connected to the electric motor box body, and the brake ring is made of a flexible material; one end of a movable shaft is fixedly connected with the rotor, the other end of the movable shaft is fixedly connected with the support ring, and the movable shaft is slidably connected in the opening; a sliding chute is arranged onone side of the elastic sleeve pin coupling, a sliding plate is slidably connected in the sliding chute, and the sliding plate is fixedly connected with the bottom of the sliding chute through a fourth spring; and the end surface of the sliding plate is in contact with the inner wall of a winding drum, so that the safety of the electric hoist is enhanced.

The invention discloses a cavity filter, which comprises a cavity, a cover board and a tuning self-locking bolt, wherein the cover board is used for closing the cavity of the cavity filter; the cover board comprises a cover board body; the cover board body is made of an aluminum product; a tuning threaded hole is formed in the cover board body and specifically is a lug boss which extends towards the direction of the cavity and is molded integrally with the cover board body; the tuning self-locking bolt is divided into a head part and a rod part and is fabricated by copper; the head part is arranged at one end of the bolt; the rod part is arranged at the other end of the bolt; two sets of threads are arranged on the head part of the bolt to form screws; the upper and lower two sets of threads are the same in screw pitch P; the diameter of the upper thread is greater than that of the lower thread; and the diameter of the part between the two threads is 40%-70% that of the rod part. The cavity filter disclosed by the invention has the advantages of cost and tuning performance.

The invention provides a threshing roller with an adjustable threshing diameter and a combine harvester. The threshing roller with the adjustable threshing diameter comprises the threshing roller, diameter adjusting devices, transmission devices and self-locking devices, wherein the diameter adjusting devices are located at the inner sides of supporting plates arranged at two ends of the threshingroller; the self-locking devices are located at the tail parts of the threshing roller; the transmission devices transmit power to the diameter adjusting devices and the self-locking devices; stepless adjustment of a roller threshing diameter can be realized through the diameter adjusting devices; meanwhile, the self-locking devices can completely lock an adjusted roller diameter to guarantee thestability of roller operation. According to the invention, the roller threshing diameter of the combine harvester can be conveniently and quickly adjusted, so the threshing linear speed and threshingclearance of the threshing roller can meet the optimal harvesting parameters of different varieties of grains at different regions, and the threshing adaptability of the combine harvester can be effectively improved.

The invention discloses a simple large reversal resistant lifting gear reducer of an automobile seat. The lifting gear reducer comprises a case cover (1), an output gear (2), a planetary gear (4), a cross sliding plate (5), a chute ring (6), an off-axis turbine (7), a rotatory shaft (9) and a gear box (10). By adopting the device composed of the components, during working, a motor drives the off-axis turbine to rotate through a worm to conduct turbine speed reduction movements, and the off-axis turbine drives the planetary gear to conduct small tooth difference speed reduction movements along inner teeth of the output gear; when the output gear tends to reverse under the effect of external force, the cross sliding plate having extremely high self-locking ability for resisting reverse high torque and a mechanism of the chute ring stop the planetary gear from generating reversal; and by combining the technical scheme of turbine speed reduction, the cross sliding plate and a self-locking mechanism resistant to reverse high torque of the chute ring, and large speed ratio of small tooth difference speed reduction, the lifting gear reducer of the automobile seat realizes the purposes of simple structure, low cost and high self-locking ability for resisting the reverse high torque.

The invention discloses a waveguide switch with a novel structure, which comprises a control device and a rotor assembly, a control rotating shaft of the control device is connected with a motor shifting block, the motor shifting block is provided with a slip ring, a rotor rotating shaft of the rotor assembly is connected with a rotor shifting block, and the slip ring is slidably clamped in a chute of the rotor shifting block. According to the waveguide switch, the 90-degree special micromotor is matched with the rocker sliding block transmission mechanism, 90-degree reciprocating rotation of the motor is converted into 90-degree rotation of the rotor, and four-channel corner cut conversion is achieved; a manual switching mechanism is designed to meet the requirement of manual control in the mechanical assembly and joint test process, and dual control of electric control and manual control is achieved; and after setting in place, an automatic power-off measure ensures the safety of the waveguide switch. According to the waveguide switch, the complexity of a control circuit is reduced, the insertion loss is small, the isolation degree is high, the bearing power is large, the performance is stable and reliable, and the safety is high.

The invention belongs to the technical field of fixed members, and particularly relates to a self-locking bolt. The self-locking bolt comprises a screw, a screw head and a nut; the screw head is in adisk shape, and is provided with a through hole in the horizontal direction; the screw is a half-thread screw; the end, close to the screw head, of the screw is a smooth surface; the end, away from the screw head, of the screw is of a threaded structure; and the nut is matched with a bolt. A bolt set can be in self locking, a good anti-theft effect is achieved, two implementing manners are achieved for self locking of the nut, and a selective space is provided.

The invention discloses an elevator counterweight frame clamping and releasing device. The elevator counterweight frame clamping and releasing device comprises a storage battery, a hydraulic power unit, a clamping and releasing mechanism and a remote operation unit. The hydraulic power unit comprises a direct-current motor, a gear pump, a filter, an overflow valve, a one-way valve, an unloading valve, a pressure relay, an energy accumulator, a magnetic exchange valve, a two-way hydraulic lock, a movement oil cylinder and an oil tank; the clamping and releasing mechanism comprises clamping arms, middle rods, a machine frame, machine frame and clamping arm connecting hinge pins, clamping arm and middle rod connecting hinge pins, middle rod and movement oil cylinder connecting hinge pins and movement oil cylinder piston rod guide sliding blocks; the remote operation unit comprises a remote control transmitter and a remote control receiver. The elevator counterweight frame clamping and releasing device can accomplish self-locking clamping and rapid release of an elevator counterweight frame in an elevator testing tower and meet diversified requirements for the release height of the counterweight frame, and has the advantages that remote operation and rapid release are achieved, the structure is compact, the functions are complete, and safety is high.