1248results about How to "Realize self-locking" patented technology

The invention relates to an oil field operation device, in particular to an oil field workover treatment machine. The machine body is arranged on a hydraulic load-bearing traveling gear and is interlocked with the hydraulic load-bearing traveling gear. Hydraulic tongs connected with a telescopic bracket on the machine body can be extended out and retracted with the telescopic bracket. A clip seat is positioned below the hydraulic tongs and is arranged on a well head. An elevator which is suspended onto the machine body can reciprocate up and down. A faucet is positioned above the machine body and the clip seat; a pipe throwing device is arranged on the faucet and the machine body; and a clip unlocking device and a clip locking device corresponding to the elevator are arranged on the clip seat and the pipe throwing device respectively. A righting mechanism and a valve mechanism are further arranged on the faucet. A control cabinet is arranged on the machine body; and the clip seat, the hydraulic tongs, the elevator and the pipe throwing device are connected with a control system in the control cabinet respectively. The oil field workover treatment machine can be assembled and disassembled conveniently and rapidly, thereby not only facilitating transportation, but also changing the positions to meet the requirements of different work. Simultaneously the machine can be laid freely at a well field according to the practical conditions.

The invention relates to an intelligent anastomat which comprises an electric clamping transmission component, a manual excision-closed transmission component, an executor steering transmission component, a nail bin support (16), a nail supporting seat (17), a short connecting pipe (14), a connecting pipe (13), a movable handle (39) and a fixed handle (40), a control module is arranged on the nailsupporting seat (17), the short connecting pipe (14) and the connecting pipe (13) are connected with the nail bin support (16) and an adjusting shell (36), the movable handle (39) and the fixed handle (40) are arranged at the rear end of the adjusting shell (36), a handle (25) and a battery (45) are connected below the fixed handle (40), and a pull-back block (49) and an external power supply line (55) are arranged on the movable handle (39). Compared with the prior art, the intelligent anastomat can really reduce subjective participation of doctors, use of the anastomat is more standardized,so that harmful effects caused by lack of experience of users are avoided, and anastomosis success rate is increased.

The invention belongs to the technical field of lower limb exoskeleton robots, and discloses an ankle joint exoskeleton based on an elastic element rigidity switching mechanism. The ankle joint exoskeleton based on the elastic element rigidity switching mechanism comprises a shank brace, a foot support, a spring support, a motor support, a motor, a ball screw mechanism, an extension spring, a return spring, a penetrating type electromagnet, a ratchet wheel support and a ratchet wheel mechanism, wherein the ratchet wheel mechanism comprises a ratchet wheel and a pawl; the penetrating type electromagnet is mounted on the ratchet wheel support; one end of the return spring is connected with the pawl while the other end of the return spring is mounted on the ratchet wheel support; the lower end of the extension spring is mounted on the spring support while the upper end of the extension spring is connected and wound onto a pulley through a rope; and the pulley is arranged on a ratchet shaft. By the extension spring, a unique energy storage process of achilles tendon and an energy releasing mode can be simulated effectively, an elastic element rigidity switching function can be fulfilled on the basis of a human gait movement rule, thus, an elastic element conforms to time-variant characteristics of in-gait and inter-gait of human movement, three-dimensional geometrical parameter limitation can be broken through, and deformation of the elastic element is improved.

The invention provides an anchor for lifting prostate tissue. The anchor comprises a first anchor body, a second anchor body and a fixed thread, wherein the first anchor body and the second anchor body are connected by virtue of the fixed thread; one end of the first anchor body is provided with a fixed tube and the other end of the first anchor body is provided with an arc-shaped elastic sheet; an arc line of the arc-shaped elastic sheet is tangent with the central axis of the first anchor body, and the arc-shaped elastic sheet is bent in a direction opposite to the direction of the fixed thread; the second anchor body is a V-shaped elastic clamp which is such defined that a first clamping arm and a second clamping arm are fixedly connected by virtue of an end; locking teeth A and locking teeth B, which are same in structure, are arranged on the opposite side faces of the first clamping arm and the second clamping arm; a locking tooth buckle is defined by the locking teeth A and the locking teeth B; one end of the fixed thread is fixedly arranged in the fixed tube and the other end is clamped and fixedly arranged in the locking tooth buckle; according to the anchor, the first anchor body can automatically form a self-locking state when released, and by virtue of the locking tooth buckle which is arranged on a clamping face of the second anchor body and has functions of unidirectional guiding and reverse locking, the phenomenon that an operation becomes failed in the case that the clamped fixed thread slips is avoided.

The invention discloses a self-adaptive underactuated robot clamping claw which comprises a clamping claw shell, a drive module and finger modules. The clamping claw shell comprises a front clamping claw shell body, a rear clamping claw shell body and a fixing flange, wherein the front clamping claw shell body and the rear clamping claw shell body are connected and are further in bolt connection with the fixing flange. The drive module is arranged in the clamping claw shell and comprises a drive motor, a power transmission device and drive rods. The drive motor is used for driving the drive rods to make synchronous linear motion and transmitting torque through the power transmission device. The finger modules comprise the first finger module and the second finger module which are each provided with a first finger section and a second finger section. Each first finger section and the corresponding second finger section are hinged to the corresponding drive rod through a self-adaptive connecting rod system and a parallel connecting rod system, and area driven to move through the drive rod. The self-adaptive underactuated robot clamping claw can grab objects in different shapes in different manners, is suitable for requirements of different occasions and high in clamping range and clamping force, and can grab the objects more conveniently.

The invention relates to a gapless gear transmission device and a method for removing a gear transmission gap. The gapless gear transmission device comprises a third gear connected with an output shaft of a driving device, a first gear and a second gear, wherein the first gear and the second gear are simultaneously meshed with the third gear and installed on a gear shaft in parallel, gear modules of the first gear and the second gear are same, the first gear is fixed on the gear shaft through a key groove, and penetrated wedge-shape similar holes are arranged on a gear face of the first gear. The second gear is sleeved on the gear shaft and can rotate along the gear shaft, axial movement is achieved through a spring and an adjusting nut installed on the gear shaft, a wedge-shape similar protruding block matched with the wedge-shape similar holes is arranged on the second gear corresponding to the positions of the wedge-shape similar holes, and a junction surface of the holes and the protruding block is a spiral curved surface. Staggered angles between the first gear and the second gear are adjusted through mutual rotation between the wedge-shape similar holes and the wedge-shape similar protruding block, and a transmission gap between gears is removed. The gapless gear transmission device and the method are simple in structure, convenient to operate and wide in application scope.

The invention discloses a self-locking type emulsion pump which comprises a pump chamber. A pump bead mechanism is arranged at the lower end of the pump chamber. A liquid inlet is formed in the portion, at the lower end of the pump bead mechanism, of the pump chamber. The self-locking type emulsion pump is characterized in that a locking cap capable of connecting a locking bottle cap to the pump chamber is inserted in the upper end of the pump chamber, the outer wall of the locking cap and the inner wall of the pump chamber are sealed, a pump rod is arranged in the pump camber, penetrates the locking cap and is movably sealed with the locking cap, a suction plug is arranged at the portion, at the lower end of the locking cap, of the pump rod, a bend is connected to the upper end of the pump rod, ribs are arranged on the outer wall of the lower end of the bend, limiting steps are arranged at the upper end of the locking cap and jacked by the ribs when the bend is locked, receding grooves allowing the ribs to move vertically are formed in the inner wall of the locking cap, and the limiting steps are communicated with the receding grooves. The self-locking type emulsion pump is simple in structure, convenient to use and capable of being locked by rotating the bend.

The invention belongs to the field of robot clamping jaws, and specifically relates to a self-adaptive under-actuated turning three-finger robot clamping jaw. The clamping jaw comprises a clamping jawshell, a drive module, a first finger module, a second finger module and a third finger module, wherein the drive module is installed in the clamping jaw shell and comprises a first drive motor, a second drive motor, a first power transmission system, a second power transmission system and three drive rods, the three finger modules are distributed circumferentially and are distributed at three sides of the top of the clamping jaw shell, each finger module comprises a finger base, a first finger section and a second finger section, the first drive motor drives the three finger modules to finish a grasp action through the first power transmission system, the second drive motor drives the second finger module and the third finger module to rotate along respective axis through the second power transmission system so as to acquire corresponding gestures of different finger modules. The clamping jaw can grasp a target object adaptively, has a large stroke, grasps stably, and has a graspingand self-locking function.

The invention discloses an electric vehicle permanent magnet DC brushless motor controller and a control method. The electric vehicle permanent magnet DC brushless motor controller comprises a control unit, a power driving unit, an inverter unit and BLDCM, a position detection unit and a signal input unit; subjects various input signals to logic synthesis in order to provide various control signals for a driving circuit; generates a PWM signal with a corresponding duty cycle in order to adjust the rotating speed of a motor, realizes motor self-locking by changing a driving timing sequence; and achieves overcurrent, undervoltage, and overvoltage fault protection functions. While guaranteeing the normal operation of an electric vehicle, the electric vehicle permanent magnet DC brushless motor controller improves the efficiency of the motor and a storage battery, saves energy, is simple in hardware structure, low in cost, perfect in function and high in reliability, and has high application and promotion values.

The invention discloses a variable-speed transmission mechanism for relay transmission of variable-diameter gears. The variable-speed transmission mechanism comprises two variable-diameter relay transmission gears, variable-diameter adjusting mechanisms, a power input shaft and a power output shaft, wherein the two variable-diameter relay transmission gears are connected with each other through a transmission gear group; the variable-diameter adjusting mechanisms are respectively arranged on the two variable-diameter relay transmission gears; the power input shaft is connected with one variable-diameter adjusting mechanism, and the power output shaft is connected with the other variable-diameter adjusting mechanism. Based on the basic principle of infinitely variable speed, through unique and novel design concept, variable transmission ratio of a main driven wheel is realized by utilizing a clack body combined type variable-diameter wheel body, effective variable-diameter control is realized through the variable-diameter adjusting mechanisms, and power transmission is realized through engagement of gear belts and gears; the variable-speed transmission mechanism is simpler in structure, superior in weight volume and lower in production and manufacturing costs; moreover, the variable-speed transmission mechanism is firmer in structure, the bearing load and torque transmission capacity are greatly improved, and the problems in the prior art that thermal decay exists and larger torques cannot be transmitted through friction transmission speed are solved, so that the variable-speed transmission mechanism can be widely applied to large-displacement automobiles.

The invention belongs to the technical field of bolts, and particularly relates to a safety bolt which comprises a bolt rod and a bolt box, wherein the bolt rod penetrates in the bolt box; the bolt box comprises a bolt shell and a base; the bolt shell is divided into a reset cavity and a safety cavity by a partition plate; a baffle for preventing the bolt rod from sliding down from the safety box is fixed on the bolt rod and arranged in the reset cavity; the reset cavity is provided with a reset spring for resetting the bolt rod; a safety pin, a positioning spring and a spring positioning block are assembled in the safety cavity; the spring positioning block is fixed at the lower middle part of the safety pin; the lower end of the positioning spring is connected with the spring positioning block and sleeves the safety pin above the spring positioning block; the upper end of the safety pin penetrates out of the top of the safety cavity; a safety hole is formed in the bolt rod; the diameter of the safety hole is greater than the diameter of the safety pin. According to the safety bolt provided by the invention, the bolt rod slides toward the safety cavity so that the safety pin slides into the safety hole to realize self-locking of the bolt; automatic rebound of the bolt rod is realized through the reset spring by pulling out the safety pin.

An electric armrest of an automobile seat comprises a top cover and a bottom cover, wherein the top cover is separated from the bottom cover, a mechanical transmission mechanism is arranged between the top cover and the bottom cover, the top cover is connected with a moving end of the mechanical transmission mechanism, the mechanical transmission mechanism is connected with an output shaft of an electric motor, and a control end of the electric motor is connected with a control circuit. A self-locking structure is arranged inside the mechanical transmission mechanism. The mechanical transmission mechanism comprises a parallel four-rod mechanism and a driving mechanism, the driving mechanism comprises a transmission device and a sliding block, a fixing support and a guide rail are arranged on the bottom cover, and the transmission device is composed of a worm-and-gear structure and a screw nut pair two-stage transmission mechanism. The control circuit is arranged between the top cover and the bottom cover and is connected with a key plate, a control line and a power line. By the aid of the electric armrest, the height of the top cover can be adjusted at random, so that the height of the armrest can be adjusted, the comfort of driving is improved, and the fatigue during long-term driving is avoided.

The invention discloses an air control pilot type magnetic self-locking bi-stable engine control valve structure. The air control pilot type magnetic self-locking bi-stable engine control valve structure comprises a main valve, an air cylinder and an auxiliary valve; the auxiliary valve is of a two-position three-way permanent magnet self-locking structure and can be self-locked through electromagnetic force generated by a permanent magnet, the opening movement and the closing movement can be carried out when pulse currents are guided into coils, the auxiliary valve controls gas to fill a piston cavity of the main valve or to be exhausted from the piston cavity of the main valve, and therefore a main valve core can be opened or closed under the effect of aerodynamic force of a piston and spring force. According to the air control pilot type magnetic self-locking bi-stable engine control valve structure, an engine control valve is light in weight and low in power consumption.

The invention relates to a structurally integrated piezoelectric inchworm linear motor. The structurally integrated piezoelectric inchworm linear motor comprises a left clamping mechanism, a right clamping mechanism, a driving mechanism, and an output shaft, wherein the driving mechanism is located between the left clamping mechanism and the right clamping mechanism, the left clamping mechanism and the right clamping mechanism are respectively provided with a first clamping body, a second clamping body, and a clamping drive assembly respectively, the driving mechanism comprises a left rigid part, a right rigid part, an intermediate rigid part, a pre-tightening elastic part, a flexible thin plate, and a piezoelectric actuator for driving, a clamping position for clamping the piezoelectric actuator for driving is arranged between the pre-tightening elastic part and the intermediate rigid part, the output shaft passes through the left rigid part, the piezoelectric actuator for driving, and the right rigid part at a time, a pre-tightening screw for pre-tightening the piezoelectric actuator for driving is arranged between the left rigid part and the middle rigid part, and a vacancy forinserting the pre- tightening screw for the piezoelectric actuator for driving is formed in the left clamping mechanism. The structurally integrated piezoelectric inchworm linear motor has the advantages that the clamping mechanism is integrated with the driving mechanism and the piezoelectric actuator can be clamped off when only subjected to pressure.

The invention relates to a spiral pipe inner wall weld joint grinding device. The spiral pipe inner wall weld joint grinding device comprises pipeline supporting mechanisms at the two ends, a rotary feeding mechanism and a grinding and executing mechanism, wherein each pipeline supporting mechanism comprises a central supporting seat and a plurality of movable supporting legs capable of self-locking, the movable supporting legs are evenly spaced along the circumferential direction and are arranged on the central supporting seat in a telescopic manner, the rotary feeding mechanism comprises anaxial sliding rod, a rotary servo driving device, a screw rod mechanism and an axial stepping motor, wherein the axial sliding rod and the screw rod mechanism are correspondingly arranged between thepipeline supporting mechanisms at the two ends in the axial direction, the axial sliding rod is driven to rotate through the rotary servo driving device, the screw rod mechanism is driven and controlled by an axial stepping motor, the grinding and executing mechanism is movably arranged on the axial sliding rod through a moving platform and is driven to move in the axial direction through the screw rod mechanism, and the grinding and executing mechanism is provided with a telescopic adjusting structure. According to the spiral pipe inner wall weld joint grinding device, mechanical grinding ofspiral welding joints on the inner wall of a spiral pipe can be realized, the stability is high, and the accuracy is good.

The invention discloses a circuit for soft startup and soft shutdown. The circuit comprises a positive (P)-channel metallic oxide semiconductor field effect transistor (MOSFET), a negative (N)-channel metallic oxide semiconductor field effect transistor (MOSFET), an isolating component, an input input/output (I/O) port and an output I/O port, wherein the source of the P-channel MOSFET is connected with an external power supply; the grid of the P-channel MOSFET is connected with the external power supply through a first resistor; the drain of the P-channel MOSFET is connected with a system power supply; the source of the N-channel MOSFET is grounded; the grid of the N-channel MOSFET is grounded through a second resistor; the drain of the N-channel MOSFET is connected with the grid of the P-channel MOSFET; the first electrode of the isolating component is connected with the grid of the P-channel MOSFET; the second electrode of the isolating component is connected with the system power supply through a fourth resistor; the third electrode of the isolating component is grounded through a power button; the input I/O port is connected with the second electrode of the isolating component; and the output I/O port is connected with the grid of the N-channel MOSFET through a third resistor. The startup/shutdown control process of the circuit comprise the following steps of: detecting whether the input I/O port is in a low-level state or not; if the input I/O port is in a high-level state, finishing the process; and if the input I/O port is in the low-level state, setting the output I/O port in the high-level state or in the low-level state. Thereby, the circuit can ensure that power is cut off completely when a system is shut down and no standby current exists.

The invention discloses a handheld flexible multi-joint surgical instrument for abdominal cavity minimally invasive surgery, and relates to the technical field of medical equipment for laparoscopic minimally invasive surgery. The handheld flexible multi-joint surgical instrument comprises a tail-end surgical forceps mechanism, a wrist flexible multi-joint combination and a control box. The wrist flexible multi-joint combination comprises a plurality of hook joins which are structurally identical to one another, the heads and the tails of the multiple hook joints are sequentially connected withone another, and the hook joint at the head of the wrist flexible multi-joint combination is connected with the tail-end surgical forceps mechanism; the control box comprises a shell, a routing pipe,a bottom plate, a gear transmission mechanism, a guide column group and two groups of bidirectional ratchet wheel transmission mechanisms, and the gear transmission mechanism, the guide column groupand the two groups of bidirectional ratchet wheel transmission mechanisms are arranged on the bottom plate. The handheld flexible multi-joint surgical instrument has the advantages that the problems of low flexibility ratios of the traditional medical surgical instruments and restriction on surgical operation due to rigid structures can be solved by the aid of the handheld flexible multi-joint surgical instrument; the handheld flexible multi-joint surgical instrument has movement self-locking properties, and a doctor can operate the handheld flexible multi-joint surgical instrument with a single hand; the handheld flexible multi-joint surgical instrument can be used for the abdominal cavity minimally invasive surgery.

The invention discloses a clamping and lifting type car carrier, including two carrier bodies with the same structure. Each carrier body includes a walking car body for walking, a lifting frame arranged above the walking car body, a lifting mechanism for jacking the lifting frame, and a clamping mechanism arranged on the lifting frame, each clamping mechanism includes guiding rails, two sets of arm clamping holding frames matched with the guiding rail and capable of moving in the horizontal direction, and clamping arms hinged to the arm clamping holding frames; and synchronous gear boxes are arranged on the lifting frames located between the guiding rails, the output ends of the synchronous gear boxes synchronously drive the expansion and contraction of the two sets of clamping arm holdingframe through two sets of synchronous racks, and the input ends of the synchronous gear boxes is connected with a centering motor in a transmitting mode through a transmission mechanism. According tothe clamping and lifting type car carrier, automatic clamping to car wheels is achieved while the center layout of cars about the center of the carrier body is achieved, the functions of the centering device and arm clamping holdingmechanisms are reused, and car -tipping is prevented.