132results about How to "Stable traction" patented technology

A system and method in accordance with the present invention provides a infusion catheter that is flexible, has such a smooth traction and a low profile to minimize break up of the obstruction when crossing it, can access distal vasculature quickly, is easy to use and readily to be implemented in the conventional PCI. Another object is to provide a method that can be performed within a short period of time and employs the catheter described herein to infuse a therapeutic agent distally to the obstruction before it is removed as a means of reducing reperfusion injury, protecting distal vasculature and microcirculation, preserving myocytes, reducing infarct size and ischemic damages in the heart, brain, lung, liver, kidney and limb. Another object is to provide complementary feature options to the infusion catheter and the aspiration catheter to improve the speed and quality of the vessel clearance.

An omnidirectional vehicle 1 includes: a main wheel 3 which is able to be driven in all directions; a base 2 which supports the main wheel 3; and a sub wheel 4 which is connected to the base 2 via an arm 15 and is grounded at a position apart from the ground contact point of the main wheel 3. The sub wheel 4 is attached so as to circularly move about the center of rotation of the main wheel 3.

The invention belongs to the technical field of rail traffic, and provides an explosion composite induction plate device for linear motor rails. The device comprises a rail bed, sleepers, a linear motor, an explosion composite induction plate, press seats, fixing bolts and bolt sleeves, wherein the sleepers are laid on the rail bed in a close-packed manner; steel rails are symmetrically arranged on two sides of the sleepers; a locomotive is arranged on the steel rails by virtue of rail wheels, and the linear motor is arranged right under the locomotive; the explosion composite induction plate is arranged right under the linear motor and comprises an upper pure aluminum plate and a lower substrate steel sheet; steel angles are symmetrically connected to the lower side of the explosion composite induction plate, and rib plates are fixed among the steel angles; one side of each steel angle is pressed below the respective press seat; the press seats are fixed on the rail bed by virtue of the fixing bolts and the bolt sleeves; and the bolt sleeves are pre-buried on the rail bed. The device can be used for effectively solving the problems that a composite induction plate is low in binding strength and easily causes operation failure of a linear motor rail vehicle due to the occurrence of delamination splitting.

In an elevator apparatus, an elevator car is suspended in an elevator shaft by a main rope. The car is provided with a car guide device engaging with a car guide rail. A speed regulator sheave is provided at the upper part of the elevator shaft. A speed regulator rope is passed over the speed regulator sheave. The speed regulator rope is circulated as the car is lifted and lowered. A resin-coated rope, having on its outer periphery a coating body of a resin material, is used as the main rope and the speed regulator rope. A non-lubricated guide device is used as the car guide device.

The invention provides a tower crane with a luffing boom and a mounting method for a variable-amplitude pull rod of the tower crane. The tower crane with a luffing boom comprises an A-shaped frame, a boom frame, an A-shaped frame fixed pulley block, a variable-amplitude pull rod movable pulley block, a variable-amplitude drum and a variable-amplitude rope, wherein one end of the boom frame is articulated with the A-shaped frame, the A-shaped frame fixed pulley block is arranged at the top end of the A-shaped frame; the variable-amplitude rope is threaded and wound on the variable-amplitude pull rod movable pulley block and the A-shaped frame fixed pulley block, one end of the variable-amplitude rope is wound to the variable-amplitude drum and the other end of the variable-amplitude rope is fixed at the end fixing point of the variable-amplitude rope on the A-shaped frame; and the tower crane with the luffing boom further comprises at least two traction ropes, and each of the traction ropes is connected at intervals on a pulley frame of the variable-amplitude pull rod movable pulley block and connected with a traction mechanism. Based on the technical scheme provided by the invention, the balance of the movable pulley block during traction is guaranteed by at least two traction ropes to prevent the twisting of the mounted variable-amplitude rope caused by the inclination of the movable pulley block, so that the traction process is smooth and safe.

The invention discloses a traction mechanism for a full-automatic vacuum packing machine. The full-automatic vacuum packing machine comprises a vacuum reciprocating mechanism and traction mechanisms. The vacuum reciprocating mechanism comprises a main box body capable of moving left and right and fixed side box bodies positioned on the left and right sides of the main box body, wherein the main box body moves left and right can be combined with one side box body at the same time to form a vacuum chamber, and the other side box body forms an open packing station. The number of the traction mechanisms is two sets; and each set of traction mechanism comprises a motor mounting plate, a driving motor, a driving traction wheel, two drive shafts, two driven traction wheels, two bag clasping traction wheels, a rear tensioning wheel and a double-side synchronous belt. The motor mounting plate is arranged on the main box body; the driving motor, the two drive shafts and the rear tensioning wheel are all arranged on the motor mounting plate; the driving traction wheel is arranged on the output shaft of the driving motor; the two driven traction wheels and the two bag clasping traction wheels are arranged on the upper and lower ends of the drive shafts in pair respectively; and the two bag clasping traction wheels rotate in opposite directions through the double-side synchronous belt.

The invention discloses a torque detecting device and a detecting method used in a tractor gearbox inner cavity. The torque detecting device comprises main and auxiliary box signal disks, main and auxiliary box detecting sensor, a main box signal disk spline sleeve, a gearbox case, front and rear bearings, a flexible signal shaft, a power output shaft 7, a power output drive gear, a power output driven gear, a power output shaft bearing, a controller, and the like. The torque detecting device consisting of the above components is installed inside a tractor gearbox, performs measurement and feedback of the torque and the rotation speed through a detection system and a sensor analysis system to monitor the change of the working rotation speed and the torque of the tractor in real time, can effectively control the reasonable range of the rotation speed difference and the size range of the inertia moment during a matching and gear-shifting process, can accurately calculate the power outputof the engine and the rotation speed of the tractor to achieve real-time monitoring of the output power of the tractor, can effectively adjust the reasonable gear-shifting timing of the tractor, canimprove the gear-shifting quality of the power gear-shifting of the tractor, and can ensure the constant power output of the engine.

The invention relates to the technical field of cable traction devices, and discloses a cable threading traction device for building electrical engineering. Through arrangement of a heating motor, a heating wire and the like, a heat shrink tube is shrunk, and a cable leather sheath is wrapped and thickened so that subsequent traction is facilitated, and damage to the cable leather sheath by adopting a traditional net sleeve mode is avoided; through the arrangement of a winching machine, a pull disc and the like, the pull disc drives an upper shell and a lower shell to move towards one side, through the arrangement of semicircular holes, the upper shell and the lower shell drive the cable leather sheath to move towards one side of the winching machine, then the purpose of damage-free traction is achieved, and through the arrangement of a control rod and the like, stable traction can be achieved, and the cable leather sheath is prevented from being separated during traction due to the too thin cable leather sheath; and through the arrangement of a fixing cone, a suction cup and the like, distinguished reinforcement is achieved according to different geologies, and a situation that a pay-off rack slides accidentally in the traction process and accidents are generated is avoided.

The invention discloses a process flow of a single-track double-end dragger with a flying saw, and aims to provide a process flow of a dragger which can cut automatically, meet requirements of multiple specifications and save labors and resources. The process flow comprises the following steps that: a P1 drawing head clamps sections at a discharge hole of an extruder; when the sections are drawn to meet a P2 drawing head, the P2 drawing head clamps the sections, and the two drawing heads draw the sections together at the same speed; the P1 drawing head loosens the sections and returns to the discharge hole of the extruder; the P2 drawing head continues to draw the sections and stops drawing until the extruder enters the non-extrusion period, and continues to draw the sections when the non-extrusion period ends; a detector on the P1 drawing head detects stopping marks, the P1 drawing head clamps the sections to cut the sections completely, the P2 drawing head draws the sections to reach the discharging position and unloads the sections, and moves to the P1 drawing head at the high speed; and the step is repeated when the two drawing heads meet each other. The process flow is mainly used for drawing products automatically after the products are produced by manufacturers of extruded sections.

The invention discloses a two crawler type tractor. The two crawler type tractor comprises an upper moving frame, a lower fixing frame and a traction mechanism, wherein a plurality of slide rails arearranged on one side of the upper moving frame, the same ends of the plurality of the slide rails are all connected with a top frame, a plurality of oil cylinders are installed on the top frame, the bottom of each oil cylinder is connected with a telescopic rod, and each telescopic rod is connected into the slide rail on the corresponding position, and connected with the upper moving frame. The two crawler type tractor can solve the problems that a slipping phenomenon is easily caused in the traction process of a submarine cable due to the fact that most crawler belts used by an existing crawler type tractor are flat belts, the existing crawler type tractor is lack of a mechanism for adjusting the distance between each two adjacent crawler belts, and therefore the distance between each twoadjacent crawler belts is inconvenient to adjust; the existing crawler type tractor is lack of an abutting and limiting component when each two adjacent crawler belts clamp the submarine cable, and therefore slip is easily caused in traction; and all assemblies of a traction mechanism of the existing tractor need customized production, and therefore cost is high, and procurement is troublesome.

The invention relates to an automatic bypass cable conveying system. The system comprises an electric pole, a track, a traction assembly and a cable supporting assembly. A supporting assembly is arranged on the electric pole. The supporting assembly is connected with a hanging assembly. The rail is arranged to be of a rope structure. The hanging rod is arranged on the hanging assembly after beingtightened. Two ends of the track are respectively connected with the first pay-off rack and the ground. The plurality of traction assemblies are connected with the traction rope and are arranged on the rail in a sliding manner. Two ends of the traction rope are respectively connected with the second pay-off rack and the lead rack. A traction machine capable of pulling the traction rope to move isfurther arranged on one side of the second pay-off rack. The cable supporting assemblies are connected with the traction rope and arranged on the rail in a sliding mode, each cable supporting assemblyis provided with a first fixing position for fixing the traction rope and a second fixing position for supporting the bypass cable, and the bypass cable is not pulled in the conveying process. The automatic bypass cable conveying system is simple in structure and convenient to convey.

The invention discloses a shore end traction device for intelligent ship docking. The traction device is reasonable in structural design, a second motor is driven to drive a turbine worm to drive a traction arm to swing by taking one end as an origin, an electric push rod drives the traction device to hook a traction ring on the shore side, a first motor is driven to drive a sliding plate to moveon a lead screw so as to achieve stable traction, stable traction under the condition of unmanned operation can be achieved, the traction device is more convenient, and the traction device can be adjusted according to the distance between the ship body and the shore, so that the practicability is high. The traction device is used in the technical field of intelligent ship docking.

The invention discloses a multi-roller seal tractor capable of steady traction, comprising a frame, an electric motor arranged on the frame, and a pair of wallboards arranged on the frame, wherein one side near a feeding port on the wallboard is provided with a gluing device and the wallboard is provided with three traction devices with the same structure which comprises a pair of upper, lower rollers, a shaft end of the lower roller is arranged inside a bearing support on the wallboard, the shaft end of the upper roller is arranged inside a movable bearing support which is movably arranged on the wallboard and is movably connected with one end of a lead screw, the other end of the lead screw is movably connected with a handwheel, the lead screw is also in threaded connection with the wallboards, two traction devices near a discharging port is in transmission connection with each other, and the electric motor is in transmission connection with one of the two traction devices. The multi-roller seal tractor is suitable for the gluing and traction of seal.

The invention relates to an elevator. The elevator comprises a lift car, sliding rails, a traction machine, traction ropes and a counterweight structure, wherein the lift car is connected with the traction ropes through a regulating device; the regulating device comprises an upper support plate and a lower support plate, regulating sliding grooves are formed in the opposite surfaces of the upper support plate and the lower support plate, the upper supply plate and the lower support plate are connected through regulating rods, and sliding heads at the two ends of each regulating rod are arranged in the regulating sliding grooves in the upper support plate and the lower support plate in a sliding manner; electromagnetic columns are embedded in the sliding heads; in the same regulating sliding groove, the magnetic force of the electromagnetic columns in the adjacent sliding heads is repellent; and a pedal is arranged on the inner bottom surface of the lift car, and pressure-sensitive pieces are arranged into an array on the surface of the pedal at equal intervals. The elevator is novel in structure and unique in principle and can intelligently regulate the traction positions of the traction ropes according to the distribution condition of passengers in the lift car, so that the uniform stress of each traction rope is ensured, the stable lifting of the lift car is promoted, the safety of the elevator is effectively improved, and the working efficiency is increased.