1028 results about "Traction unit" patented technology

A traction unit capable of traversing and turning on surfaces that include compound curves like the surface of a sphere or are inverted like a ceiling. The traction unit includes a plurality of trucks operable to propel the unit across a surface and a plurality of adherence members operable to releasably secure the unit to the surface. In operation, the adherence members cyclically attach to and release from the surface as the trucks propel the unit across the surface. Within each cycle, after the unit has traveled a predetermined distance relative to an attached member, the member releases the surface and reattaches to the surface at a different point.

The invention belongs to the field of oil and gas field development and relates to a tractor used for drilling, logging and well repair engineering of a coiled tubing and favorable for the coiled tubing to extend into a horizontal well section for a longer distance. A motor-driven underground tractor for the coiled tubing comprises an upper tractor system, a hexagonal central sliding pipe and a lower tractor system, wherein the upper tractor system comprises an upper supporting unit, an upper electric drive and control unit and an upper traction unit; and the upper tractor system and the lower tractor system have the same structure, and are connected at the upper part and the lower part of the hexagonal central sliding pipe respectively in a sleeving way and mounted in the same or opposite direction. The tractor is directly driven and controlled by a servo stepper motor, so that the dependence on liquid energy in the process of driving the tractor by using circulating liquid and the complexity of control of a hydraulic valve of the circulating liquid on a pipeline are reduced and most of space occupied by the hydraulic pipeline is saved; and the tractor can perform dual-direction traction, is good in stability, flexible in traction and fast in traction speed, can be suitable for underground traction work of small well holes, and can guarantee normal underground liquid circulation in the traction process.

A mower includes a zero turn radius (ZTR) traction unit carrying a front mounted cutting deck. The cutting deck is suspended beneath a carrier frame by a height of cut adjustment system comprising a plurality of pivot links and suspension chains extending between the carrier frame and the cutting deck. A hydraulic cylinder coupled to one of the pivot links can simultaneously lift the chains or permit the chains to lower to change the height of the cutting deck relative to the carrier frame. This same cylinder can also fold the carrier frame and the cutting deck relative to the traction unit about a fold pivot axis when a fold latch is selectively released by the operator. The carrier frame includes a center step for helping the operator mount or dismount the traction unit. The center step has a front view-port for allowing an operator who is seated on the traction unit to view the front edge of the cutting deck.

An orthodontic device and an orthodontic method that can prevent an orthodontic treatment from being eccentrically performed while aligning straightly tooth. The orthodontic device includes teeth-attachment unit attached to an orthodontic tooth object; and hook member provided in the teeth-attachment unit and having a connection part of traction unit for orthodontic treatment that is located in the vicinity of a center of resistance (CR) of a tooth. In addition, the orthodontic device includes teeth-attachment unit; and hook member provided in the teeth-attachment unit and having a connection part of traction unit for orthodontic treatment that is located in the vicinity of at least gingiva. Since the teeth-attachment unit of a bracket or a button is substantially horizontal to a traction line of the traction unit, it is possible to perform the orthodontic treatment effectively without eccentric phenomenon in which the tooth and a dental root are tilted.

A balancer hoist has an electric servomotor driving irreversible gearing in turn driving a hoist chain drive. A float mode and a manual mode are provided using two independent load sensors for sensing the load weight and force applied to a control grip. A traversing control is produced by a tractor carriage rolling on an overhead rail connected to a trolley also traveling on the rail and supported on upper hoist assembly. A load sensor interconnects the tractor carriage and upon hoist assembly to sense forces created by an operator pulling on the chain, which are used to control an electric motor on the tractor carriage driving a pinion gear engaged with a gear rack on the overhead rail to positively drive the carriage, trolley and upper hoist assembly along the rail. A stationary dual hoist system is also described in which two hoist assemblies are interconnected by a chain and sprockets to provide synchronized operation.

A mobile drilling structure with a base frame adapted to accommodate one or more tractor units to drill a series of relatively closely spaced boreholes in an oilfield. The drilling structure has a plurality of hinged outriggers adapted to transfer the weight of the drilling structure to a plurality of outboard tractors, but which may be retracted when not needed. The hinged outriggers allow the drilling structure to be more easy moved when lateral and longitudinal movements of the drilling structure are required in a confined area.

The invention discloses an automatic sheet take-up device which comprises a conveying mechanism, a take-up mechanism and a reel alternation mechanism. The conveying mechanism comprises a feeding transition roller, an auxiliary traction unit and a tension detection unit. The reel alternation mechanism comprises a bracket, a reel alternation unit and a cutting unit, wherein the bracket can move, and the reel alternation unit and the cutting unit are arranged on the bracket. The reel alternation unit comprises a plurality of auxiliary reel alternation rollers and a movable tight-abutting roller, wherein the auxiliary reel alternation rollers are rotationally installed on the bracket, and sheets are wound around a current take-up roller after passing through the feeding transition roller, the auxiliary traction unit and the tension detection unit to achieve automatic take-up. After the current take-up roller is filled with the sheets, the auxiliary reel alternation rollers surround the current take-up roller, the movable tight-abutting roller tightly abuts against the current take-up roller, the sheets are cut through the cutting unit, then, winding is carried out continuously, and automatic reel alternation and cutting are achieved. According to the automatic sheet take-up device, the labor cost is reduced, and the take-up precision can be conveniently and precisely controlled, so that the production speed is improved, and the automatic sheet take-up device is applicable to use and popularization on a production line of high-speed sheets, thin films and the like.

The invention relates to a machine used for the combined operation of chopping crop straws and returning farmland and recycling residual films on the ground surface. The machine comprises a traction unit (1), a transmission system (2), a frame (3), a residual film box (4), a land wheel (10), a scarifier tyne (11), a straw chopping device and a residual film recycling device; the straw chopping device consists of a reciprocating cutterbar (13), a transverse conveying belt (12), a disc type chopper (14), a protection hood (16) and a transmission device; wherein, the residual film recycling device is arranged at the back of the residual film box and consists of a chain harrow (6), an elastic gear (7) for raking the film, a bottom board (9) and a feeler wheel (8); a gear rod (5) is arranged on the chain harrow, and the elastic gear (7) for raking the film is arranged at the back side of the residual film recycling device. The machine can finish the two operations of returning the straws to the farmland and recycling the residual films, has the advantages of high operation speed, clean residual film recycling, small energy consumption and film-rod separation; moreover, the residual films are hard to twist working parts; therefore, the demands of chopping the straws and recycling the residual films can be met.

The invention relates to a wearable power-assisting flexible outer garment for lower limbs. The flexible power-assisting outer garment comprises an outer garment body, Bowden cable units, two linear traction units and a gait detection unit. Normal walking motion can be assisted when a human body wears the power-assisting flexible outer garment for lower limbs. The outer garment body is attached to the skin of the lower limbs or the surface of clothes; the Bowden cable units are distributed along the outer garment body; according to a signal of the gait detection unit, the linear traction units drive Bowden cables to pull and assist ankle joints and hip joints of the human body at appropriate moments. The two linear traction units are stacked together to be placed in a backpack, each linear traction unit pulls two sets of Bowden cable units to respectively pull the hip joints and the ankle joints of the lower limbs of the human body, so as to assist in the forward flexion of the hip joints and the downward flexion of the ankle joints to reduce acting forces required by Achilles tendon of feet and thighs and shanks to lift legs, thereby reducing energy consumption of corresponding muscles of the lower limbs of the human body and assisting the lower limes in moving.

The invention discloses a device for mounting a buckle on a sealing strip. The device comprises a traction unit, an installing unit and a feeding unit, wherein the traction unit comprises a front traction mechanism and a rear traction mechanism, the installing unit is arranged between the front traction mechanism and the rear traction mechanism, and the feeding unit is near to the installing unitand is used for supplying buckles one by one for an installing mechanism automatically. The device also comprises a base, a clam and the installing mechanism, wherein the base can slide horizontally along the running direction of a sealing strip, the clamp is arranged at the top of the base and used for horizontally clamping the sealing strip, and the installing mechanism is arranged below the clamp and used for taking buckles from the feeding unit and installing the buckles on the sealing strip clamped by the clam. According to the invention, the traction unit is used for clamping the sealing strip so that the sealing strip passes through the installing unit continuously, and the installing mechanism automatically clamps and installs the buckles on the sealing strip; and the operations can be performed continuously without changing the sealing strip in the middle, therefore the installation efficiency is improved.

A self propelled walk behind mower including a tractor unit and a mowing deck. The tractor unit is hydrostatically driven with a unique control system whereby the forward speed of the tractor is set by operating an electric rocker switch with an operator's thumb. Hand levers are used to turn the tractor to the left and the right. The tractor unit comprises two drive wheels and a third wheel that is pivotally attached, letting the tractor unit stand upright when no implements are attached. Implements attach to the front of the tractor through a movable attachment so that the tractor and implement can closely follow the contour of the ground while keeping the operator controls in a convenient position.

The invention discloses an automatic tennis ball picking robot with machine vision. The automatic tennis ball picking robot with machine vision comprises a ball picking device, a control system, a ball collecting box of which one side of the top is detachably connected with the ball picking device, and an auxiliary ball picking mechanical arm which is mounted on the ball picking device, wherein the control system comprises a system casing arranged between the ball picking device and the ball collecting box, a main control MCU arranged inside the system casing, and a power supply unit, a display unit, an obstacle avoiding unit and a traction unit which are arranged on the system casing and are connected with the main control MCU, and a binocular camera which is arranged at a middle position of the top of the ball picking device and is connected with the main control MCU; front wheels are arranged at the bottom of the ball picking device; back wheels are arranged at the bottom of the ball collecting box. The machine vision-based automatic tennis ball picking robot is high in intelligence degree, flexible in design and simple to operate, can effectively reduce the labor cost and can achieve high-efficiency ball picking.

The invention relates to the field of aviation ground facilities and specifically relates to a wheel holding mechanism of a rodless aircraft tractor. The wheel holding mechanism comprises a frame, a main lifting connecting rod, an auxiliary lifting connecting rod, a lifting oil cylinder, a swing main shaft, a swing support, a compression support, a compression oil cylinder and a clamping device, and is characterized in that the wheel holding mechanism is provided with a pushing device, the pushing device comprises a pushing main plate, a pushing oil cylinder, sliding blocks, positioning plates, an upper positioning plate and a lower positioning plate, the pushing oil cylinder is arranged at the lower end of a support platform, the pushing main plate is arranged on one side, the other end of the pushing oil cylinder is hinged with the pushing main plate through a pin shaft, the two ends of the pushing main plate are respectively fixedly connected with the positioning plates, the upper positioning plate and the lower positioning plate are arranged on the outer sides of the positioning plates, the upper positioning plate is in sliding connection with the upper end surface of a support arm via the sliding block, the lower positioning plate is in sliding connection with the lower end surface of the support arm via the sliding block, and then the pushing main plate can move rectilinearly along the support arm. When a front nose gear of an aircraft is clamped, brake constraint can be simultaneously performed on aircraft wheels by at least three points, namely the compression support, a clamping jaw and the pushing main plate, so that the potential safety hazard caused by two-point brake constraint can be solved, the traction safety can be greatly improved and the using risks of airports and airline companies can be further reduced.

This invention is an apparatus and method for reversible intermodal conversion of transport tractors and trailers, highway-to-rail. Trailer add-ons are wheel mount shims and an axle housing draft sill pin receptacle. No add-ons are required for tractors. Highway-to-rail conversion involves securing a rail interface apparatus, consisting of rail carriage assemblies, bogies, and end coupler draft sills beneath each vehicle to align and bear loads-to-rails, and to provide draft load transfer. Staging is on paved grade slightly above rail level. Vehicle conversion is made without loading/unloading mechanized infrastructure, add-on weight, wheel removal, or powered actuators. Full use of inherent vehicle suspension and anti-roll devices is afforded. Draft sills, pneumatic brake lines, and knuckle couplers are employed for train configurations. Draft may be afforded by either a locomotive or a rail converted highway tractor.

Apparatus for improving aerodynamics of a freight tractor-trailer combination, having at least one of the following:

• • a series of retractable roller-mounted screens connecting the rear of the tractor with the front of a trailer;
  • a fairing fixed to each side of the trailer near the front of the trailer, and which is adapted to fit about the rear wheels on the tractor when the tractor and trailer are connected, such fairing extending downwardly from the trailer side, and extending rearwardly towards the center of the trailer underside;
  • a pair of laterally spaced fairings connected to the underside of the trailer about the fore and aft rearmost pairs of wheels, each of said fairings having an aerodynamic rounded forward edge, and a rearward taper to a rear point;
  • an air deflector positioned at the bottom rear of the trailer, and having a slight upsweep to direct air passing beneath the trailer to a distant centerpoint to the rear of the trailer;
  • an upper baffle at the top of a rear roll-up door on the trailer positioned to direct air passing over the top of the trailer to a distant centerpoint behind the trailer; and
  • an aerodynamically improved rearview mirror mounted on the tractor having a wing profile truncated thereon.

The invention relates to the field of a semi-trailer train, in particular to a brake control system and method for the semi-trailer train. The brake control system for the semi-trailer train comprises an air braking system, a controller ECU (Electronic Control Unit) and a vehicle condition monitoring system; the air braking system comprises an energy supply module, a tractor braking module and a trailer braking module; the energy supply module comprises an air compressor, a standby air source, a pressure regulating valve and a three-loop protection valve; the tractor braking module comprises a tractor front-axis gas storage barrel, a tractor rear-axis air storage barrel; a brake proportional valve, a first two-position two-way electromagnetic valve, a tractor front-axis brake air chamber, a tractor rear-axis brake air chamber, a first air pressure sensor and a second air pressure sensor; the trailer braking module comprises a trailer air storage barrel, a second two-position two-way electromagnetic valve, an electrical control proportional valve, a trailer brake air chamber and a third air pressure sensor. According to the system, a braking pressure on a tractor and a trailer is regulated in real time; meanwhile, the problem of delay of trailer braking is solved; brake safety of the semi-trailer train is improved.

The technology relates to autonomous vehicles having articulating sections such as the trailer of a tractor-trailer. Aspects include approaches for tracking the pose of the trailer, including its orientation relative to the tractor unit. Sensor data is analyzed from one or more onboard sensors to identify and track the pose. The pose information is usable by on-board perception and/or planning systems when driving the vehicle in an autonomous mode. By way of example, on-board sensors such as Lidar sensors are used to detect the real-time pose of the trailer based on Lidar point cloud data. The orientation of the trailer is estimated based on the point cloud data, and the pose is determined according to the orientation and other information about the trailer. Aspects also include determining which side of the trailer the sensor data is coming from. A camera may also detect trailer marking information to supplement the analysis.

An article dump truck has a front tractor unit connected to an associated rear trailer unit with a tipping container by an articulated coupling. The articulated coupling is operable to allow the front tractor unit and rear trailer unit to pivot about a vertical pivot axis, rams being provided to turn the front tractor unit and rear trailer unit about the pivot to steer the dump truck. The articulated coupling also allows the front tracter unit and rear trailer unit to rotate relative to each other about a longitudinal axis of the dump truck. In addition, the front tractor unit has a front chassis mounted on a pair of wheels by an independent suspension system.

The invention discloses a method and device for weaving colorful bunchy yarn and dotted yarn based on two-component secondary traction. The device specifically comprises a traction and twisting system which comprises a primary traction unit on the front side and a secondary traction unit on the rear side. The primary traction unit comprises a combined rear roller and a middle roller. The secondary traction unit comprises a front roller and a middle roller. The two-component mixing proportion and yarn density dynamic change are controlled through primary asynchronous traction, and the datum line density or equivalent line density of yarn is controlled through secondary asynchronous traction. By means of the method and device, the changes of yarn density such as dot shape and bunchy shape of datum yarn can be accurately controlled, and the changes of yarn color such as dot color and bunchy color of datum yarn can be accurately controlled as well. Meanwhile, by controlling the middle rollers to rotate at a constant set speed, the reproducibility of pattern shape and color of yarn-density-variable yarn is ensured, and the weaving effect is more stable.

The invention provides a method, system and device for controlling starting of a vehicle. The method includes the following steps that the slope information sent by a slope acquisition device is received; according to the slope information, the traction handle level and the vehicle load information, a traction value required by starting is calculated; the traction value is sent to a traction unit,so that a traction unit applies traction force according to the traction value; a braking relief request sent by the traction unit is received, and a braking relief instruction is sent to a braking unit according to the braking relief request, so that the braking unit carries out braking relief according to the braking relief instruction. According to the method, a vehicle control system can calculate the traction value required by starting of a vehicle based on the slope information corresponding to a slope where the vehicle is located at present, the possibility of occurrence of sliding orstarting impact of the vehicle is reduced, and the user experience is improved.

The invention discloses a laser land leveling control device and method. The device comprises a traction unit (20), a supporting wheel (4), a land leveling blade (16), a laser emitter (1), a laser receiver (5), a laser receiver lifting unit (6) and a controller (15), wherein the laser receiver lifting unit (6) is used for bearing the laser receiver (5) and the controller (15) is used for controlling lifting and falling of the laser receiver (5) and the land leveling blade (16). The invention overcomes the defect that the leveling operation efficiency is low because the vehicle is repeatedly stopped to adjust the height of the receiver, solves the problem that the tractor engine or the land leveling blade is damaged because of excessive load, avoids land heaving caused by slow response of a land leveling system after the supporting wheel of the land leveling blade is raised too high from reducing the land leveling operation quality, and realizes efficient and accurate land leveling operation.

The invention discloses a die-cutting machine suitable for roll materials adopting a combined die-cutting method, comprising a frame, a roll material pulling unit, a roll material tensioning unit, and a positioning unit respectively connected with a control system , a horizontal knife unit, a vertical knife unit and a pier corner unit, wherein: the pier corner unit includes a pier corner bar, a pier corner clutch mechanism, and a pier corner tool holder and a cutter arranged on the pier corner bar, the The pier angle bar is arranged along the X direction of the frame, and the pier angle clutch mechanism is an electromagnet or a linear motion motor connected with the pier angle bar, and the electromagnet or the linear motion The motor is connected with the control system. The die-cutting machine of the present invention can solve the problem of high cost of die-cutting tools in the prior art, long production cycle, poor durability, complicated machine adjustment, heavy machine, low and unstable die-cutting quality, low die-cutting speed, waste of materials, Not suitable for technical problems such as small batch production.