98results about How to "Guaranteed driving force" patented technology

An object of the present invention is to provide a heavy-duty pneumatic tire which has a block pattern and which is capable of improving uneven wear resistance without sacrificing wet grip performance or snow performance, and which is well suited for use in various seasons. The present invention includes block patterns employing at least three types of blocks including: a central block separated by a central longitudinal groove, a middle longitudinal groove, and a central transverse groove, a central block separated by a middle longitudinal groove, an outer a middle block (4M) divided by longitudinal grooves and intermediate transverse grooves, and an outer block divided by outer longitudinal grooves, outer transverse grooves (3S) extending from the outer longitudinal grooves to the ends of the tread, Among them, the aspect ratio of the block, the groove width ratio of the longitudinal groove and the transverse groove, the maximum width of the block, the minimum width of the block and its ratio, and the circumferential edge composition and tire axial edge composition at each wear stage and its ratio are limited within a specific range.

The invention discloses a same-well extraction and injection system for medium-deep-strata terrestrial heat. The same-well extraction and injection system for medium-deep-strata terrestrial heat comprises a heat taking and heating assembly, and an underground heat extraction assembly, wherein the underground heat extraction assembly comprises a terrestrial heat well and a heat insulation pipe; theterrestrial heat well adopts a metal well wall; the metal well wall is provided with an upper-part sieve pipe and a lower-part sieve pipe at the part of a water-containing heat storage layer; a wateroutlet channel is formed in the heat insulation pipe; an annular space between the heat insulation pipe and the metal well wall forms a water inlet channel; and a packer is arranged in the water inlet channel between the upper-part sieve pipe and the lower-part sieve pipe. According to the same-well extraction and injection system for medium-deep-strata terrestrial heat, the flowing of injectionwater into the water-containing heat storage layer can be guaranteed through the action of the packer; moreover, the water-containing heat storage layer has the static pressure action of the upper part and the pumping action of the bottom simultaneously, so that the drive force of reinjection can be ensured; meanwhile, full-well-section heat taking is realized through the heat conduction of upper-part rock and lower-part convection heat exchange, so that the single-well heat taking amount is greatly increased, and drilling for a reinjection well is avoided; and moreover, the heat taking amountis greater than the heat taking amount of single-well closed heat taking, so that the utilization range of the terrestrial heat well with a low water outlet amount is expanded, and the investment risk is lowered.

The invention is a kind of product pushing device of automatic vending machine, it has: the upper and subjacent baffle plates which are supported at the aperture of the base board with shaft, and prominent from the aperture to product channel, and which maintains the first and the second product from low side; the link device which is used to control close and open of the baffle plates and which moves in shuttle through driving device, the device can push out the product with different diameter without changing the width of the channel, the character lies in: the revolution retainer is jointed with the link peg on the link device, it can lock the revolution of itself, it can restrain the rotation of the subjacent plate by using the retainer peg, maintains the maximal jaw opening state; the assistant retainer element prevents the rotation of the subjacent plate.

The elevator control device can prevent deterioration of the ride quality of the car during normal operation, and can more reliably suppress the lateral vibration of the movable connecting body. A control device (11) for an elevator includes a drive control unit (14), a control mode switching unit (12), and a calculation unit (13). When the driving control part (14) changes the rotating speed of the driving pulley (7) in a wave manner, it can limit the change frequency of the rotating speed of the driving pulley (7) in the normal mode within the prescribed low frequency band and can make the driving pulley (7) ) to switch between the vibration suppression mode at a frequency higher than the low frequency band. A control mode switching unit (12) detects lateral vibration of the main rope (8), and switches the control mode of the drive control unit (14) to a vibration suppression mode. A calculation unit (13) calculates a signal for canceling lateral vibration. The drive control unit (14) controls the rotation of the drive pulley (7) based on the information from the calculation unit (13) to suppress lateral vibration in the vibration suppression mode.

The invention discloses a deep sea four-track hydraulic direct-drive self-adaptive all-terrain chassis, which relates to the technical field of mining equipment. The deep sea four-track hydraulic direct-drive self-adaptive all-terrain chassis comprises crawler wheels, a frame, suspension mechanisms and steering mechanisms, wherein the four crawler wheels are respectively connected with four corners of the frame through suspension mechanisms; the steering mechanisms are symmetrically mounted at the front end and the rear end of the frame correspondingly; the steering mechanism is hinged with the crawler wheels, the steering mechanism comprises a steering knuckle assembly, a connecting assembly, a double-rod oil cylinder and a bogie, the double-rod oil cylinder is connected with the bottom of the frame through the bogie, and the two ends of the double-rod oil cylinder are respectively connected with the steering knuckles on the two sides through the connecting assembly. The deep sea four-track hydraulic direct-drive self-adaptive all-terrain chassis can be suitable for underwater 1000-4000 m environment operation, can also be used for non-pavement operation of mines, coastal mines, landform mines and the like, can freely go straight and steer, can freely adjust the posture and the ground clearance, and can actively intervene to achieve leveling of a vehicle body and stable groundgripping.

The invention provides an electric concrete mixer and a control method thereof. The control method comprises the following steps of acquiring the residual electric quantity of a battery pack; judgingwhether the residual electric quantity is smaller than a first threshold value or not; starting a range extender to charge the battery pack or supplying power to a driving motor if the residual electric quantity is smaller than the first threshold value. According to the technical scheme of the control method of the electric concrete mixer, the configuration of the battery pack is effectively reduced, and the structure of the electric concrete mixer is simplified, the cruising ability of the electric concrete mixer is guaranteed, the situation that the concrete mixer is broken down and a mixing drum stops rotating is avoided, emission is reduced, and pollution is reduced.

The invention discloses an air-conditioning system and an air-conditioning reversing valve. The air-conditioning reversing valve comprises a valve body and a valve spool, the valve spool comprises a piston part, the piston part comprises a piston cup and an elastic plate, the piston cup comprises a base plate and a frustum-shaped cup body, and the elastic plate comprises an elastic base plate and a frustum-shaped ring formed by a plurality of elastic pieces. The ratio of the thickness of each elastic piece to the thickness of the wall of the cup body is not smaller than 0.15 and not larger than 0.30. When in free state, the ratio of the maximum diameter of the frustum-shaped ring to the diameter of the inner cavity of the valve body is not smaller than 0.99 and not larger than 1.07, and the ratio of the maximum diameter of the cup body to the diameter of the inner cavity of the valve body is not smaller than 1.02 and not larger than 1.09. When at low temperature, the piston cup can be kept to contact with the valve body by the air-conditioning reversing valve, and affection on the sealing performance between the valve spool and the valve body from the low temperature can be reduced. When at high temperature, acting force of the piston cup to the valve body can be kept within a proper range by the air-conditioning valve, and pressure difference of reversing of the air-conditioning reversing valve at high temperature can be reduced.

The invention relates to a middle-low speed maglev vehicle running mechanism. The running mechanism comprises levitation frames connected in sequence. A linear induction motor stator is respectively hung on two sides of each levitation frame. The number of the levitation frames is six. The number of the linear induction motor stators is twelve, and the linear induction motor stators are symmetrically distributed on two sides of the running mechanism. The linear induction motor stators on each side of the running mechanism are divided into at least two groups. The linear induction motor statorsin each group are connected in series and are connected with a vehicle-mounted traction invertor. Compared with the prior art, the running mechanism increases terminal voltage of a single linear induction motor stator, and can improve maximum operation speed of a maglev train, and meanwhile system availability and reliability are improved, so as to ensure safe and stable operation of a train.

The invention relates to a self-propelled aerial working platform vehicle chassis, which belongs to the field of engineering machinery. The chassis is provided with a frame, the frame is respectively articulated with a front axle and a rear axle through main chassis shafts, the body of a four-sided slide valve is fixed on one side of the frame, a four-sided slide valve core pull rod is articulated with the rear axle, the body of a left servo hydraulic cylinder is articulated with the frame, the piston rod of the left servo hydraulic cylinder is articulated with the front axle, the body of a right servo hydraulic cylinder is articulated with the frame, the piston rod of the right servo hydraulic cylinder is articulated with the front axle, a hydraulic power source supplies oil to the four-sided slide valve under constant pressure, one oil outlet of the four-sided slide valve is connected with the piston cavity of the right servo hydraulic cylinder and the rod cavity of the left servo hydraulic cylinder via a balance valve, and the other oil outlet of the four-sided slide valve is connected with the rod cavity of the right servo hydraulic cylinder and the piston cavity of the left servo hydraulic cylinder. The invention adopts the mechano-hydraulic servo control mechanism to ensure that tyres can follow the ground to ensure driving force, and the tread can be automatically increased and decreased in the process of running.

The invention relates to a universal base plate for a heavy-load two-wheel differential robot. The universal base plate comprises a bottom plate. A suspension driving device is mounted in the middle of the bottom plate. Multiple support wheel devices are arranged on the portion, on the periphery of the suspension driving device, of the bottom plate. The suspension driving device comprises a middle shell and two driving wheel frames correspondingly located on the two sides of the middle shell. A connecting rod is arranged between each of the two sides of each driving wheel frame and the middle shell, and a four-connecting-rod mechanism is formed. Connecting end heads are correspondingly mounted on the tops of the two driving wheel frames. An adjustable spring is arranged between each connecting end head and the middle shell. The upper end of each adjustable spring is hinged to the top of the middle shell, and the lower end of each adjustable spring is hinged to the corresponding connecting end head. Driving wheel shafts with driving wheels at the outer ends are correspondingly mounted at the bottoms of the two driving wheel frames, and motors are correspondingly mounted on the inner sides of the two driving wheel frames. The outer end of a motor shaft of each motor is in butt joint with the inner end of the corresponding driving wheel shaft. Each support wheel device comprises a support wheel frame fixedly connected with the bottom plate. Universal wheels are mounted at the bottom of each support wheel frame.

The invention relates to a composite electric spindle. The composite electric spindle comprises a spindle box, a motor and a rotating shaft, wherein the rotating shaft is fixedly assembled with a motor rotor; the front end of the rotating shaft is used for installing a machining cutter; the rotating shaft is rotatably supported by a front bearing supporting structure and a rear bearing supportingstructure; a three-toothed-disc mechanism is arranged on the rear side of the motor rotor and comprises a floating toothed disc, a movable toothed disc and a fixed toothed disc; the fixed toothed discis relatively and fixedly assembled on the spindle box; the movable toothed disc is relatively and fixedly assembled on the rotating shaft; the floating toothed disc is movably assembled on the spindle box in the front-rear direction; and the floating toothed disc is provided with a combination position in the moving stroke, and the floating toothed disc meshes with the movable toothed disc and the fixed toothed disc at the same time when the floating toothed disc is in the combination position. According to the composite electric spindle, the three-toothed-disc mechanism is positioned on therear side of the motor rotor, so that compared with the prior art that a three-toothed-disc mechanism is arranged on the front side of a motor rotor, the radial size of the front end of the compositeelectric spindle is effectively reduced, and then the application fields of the composite electric spindle are effectively expanded.

The invention discloses a sand blasting derusting device for a reinforcing steel bar. The sand blasting derusting device comprises a rack, a conveying device, sand blasting devices and a sand suction device. The conveying device comprises a servo motor, a speed reducer, a chain wheel mechanism, a transmission chain, a conveying carrier roller and a reinforcing steel bar conveying groove. Each sand blasting device comprises a sand blasting compartment, a sand blasting gun frame, a gas spray gun frame, a dust collecting compartment and a steel sand recovery compartment. The sand suction device comprises a sand cylinder, a sand shot conveying-out pipe, an air compressor and a spray gun adjusting linkage device. In addition, the two sand blasting devices are sequentially installed on the rack. The sand blasting derusting device has the beneficial effects that sand blasting derusting can be conducted on the reinforcing steel bar in all directions, meanwhile, an internal environment and an external environment can be cleaned, the rack passes through the outer sides of the sand blasting compartments, the conveying carrier roller does not enter the sand blasting compartments either, and the rack and the carrier roller can be prevented from being damaged; and the sand blasting devices are increased, after sand blasting is conducted in a hierarchical manner, rough steel sand is recycled and then cleaned to be reused, and fine steel sand can be directly recycled; and with the comprehensive effect, the production efficiency can be improved, cost is reduced, and the labor protection measure is enhanced.

The invention discloses a method for controlling a chassis of a full-hydraulic drive high-speed rice transplanter; when actual traveling speed is less than A, a traveling variable motor is controlledto reach maximum displacement; when the actual traveling speed is greater than or equal to A, a plunger pump is controlled to reach maximum displacement; when overspeed is detected, the traveling variable motor that is under overspeed is controlled to reach zero displacement; when a seedling box is inclined, the seedling box reaches a horizontal state by controlling a profiling balance control valve; when grounding pressure of a seedling box floating plate is too high or too low, the grounding pressure of the seedling box floating plate is controlled to reach a set value through a seedling boxlifting control valve; when a steering wheel exceeds a set angle, the seedling box rises to the highest position; when in-situ debugging is carried out, a left reversing valve is controlled to be electrified; during non-operation transition, a right reversing valve is electrified; when normal traveling transplanting operation is carried out, the left reversing valve and the right reversing valveare not electrified; during idling, both the left reversing valve and the right reversing valve are electrified; and when plant spacing is adjusted to be smaller or larger, a rice transplanting motoris controlled to reach a larger or smaller displacement. The method can effectively improve the operation flexibility and reliability of the transplanter.