38results about How to "Reduce drag resistance" patented technology

A tire for vehicles offering low rolling resistance wherein the ground-contact surface area is variable as a portion of the tread part can be retracted and/or extended using pneumatic, mechanical or hydraulic force to withdraw from, or come into contact with the road surface before, during or after operation permitting more efficient operation wherein the material used within the tread part that retains contact with the road may generally have a smaller internal friction loss than the material used in conventional tires and the rolling resistance is thereby reduced when the retractable portion of the tread is selectively withdrawn from contact with the road surface furthermore achieving a smaller ground-contact patch footprint. The achieved object of a tire with a lower rolling resistance yields improved fuel consumption efficiency. Improvements in exterior and interior noise levels and a reduced tendency to exhibit hydroplaning action are also attained with a variable groove volume to tread surface-contact ratio. Within one embodiment of the present invention, an automated microcomputer-based tire control system is disclosed useable to command the motion of the moveable tread portion of the said tire in response to various operational scenarios.

Provided is an electric assist bicycle provided with a so-called single-axle motor drive unit capable of maintaining high torque detection performance. On an outer periphery of a crank shaft (7a), there are disposed a cylindrical human power transmission member (28) formed with a torque sensor (31) for detecting human power drive force, and a combined-force member (29) that combines the human power drive force and auxiliary drive force from a motor (21). No one-way clutch is disposed in a drive force transmission route spanning the crank shaft (7a), the human power transmission member (28), and the combined-force member (28), so that the human power transmission member (28) and the combined-force member (29) are rotated at all times as the crank shaft (7a) rotates. A rotation detector (10) is also fitted to detect the rotation of the combined-force member (29).

The invention relates to the technical field of ship cooling systems, and discloses a self-flowing cooling system and a control method thereof. The device comprises a self-flowing generator which is mounted at a bottom housing of a ship body in a lifting manner, and a water inlet channel which is arranged in the self-flowing generator, wherein the lower end part of the self-flowing generator externally extends out of the bottom housing of the ship body; the front side of the lower end part of the self-flowing generator is an incident flow surface; and a water inlet of the water inlet flowing channel is formed in the incident flow surface. According to the system, the height of the self-flowing generator extending out of the bottom housing of the ship body is adjustable; the system can control and adjust the extending height of the self-flowing generator in real time according to the actual requirement of the flow rate of cooling seawater; the active adjustment matching supply of the self-flowing cooling seawater is realized; the problems of vibration of an adjusting device and large system noise in a passive throttling mode are solved; and the dragging resistance of the self-flowing generator to the ship body can be effectively reduced in the state that the self-flowing generator does not extend out completely.

The invention relates to a water surface microplastic collection device. The water surface microplastic collection device includes a sample feeding box, a trawl net and a bag net; the sample feeding box is open in two directions; the front end of the trawl net encloses the sample outlet of the sample feeding box and is connected with the sample outlet of the sample feeding box; the bag net is detachably connected with the rear end of the trawl net; the trawl net is detachably connected with the sample feeding box; a flow meter is installed inside the sample feeding box; two sides of the samplefeeding box are and detachably provided with buoyancy adjusting fins respectively; and the buoyancy adjusting fins can be installed on the sample feeding box in a horizontally rotatable manner so that the inclined angles of the buoyancy adjusting fins can be adjusted. With the water surface microplastic collection device of the invention adopted, targeted sampling can be carried out according toa required particle size; traction resistance adjustment can be realized, so that sampling operation can be facilitated; buoyancy adjustment can be realized, so that the device is applicable to different types of water bodies; and sampling accuracy is guaranteed.

Provided is a bicycle tire for use with a bicycle wheel. The bicycle tire includes a tire body defining a closed loop and being configured to be engagable with the bicycle wheel. The tire body defines an outer periphery and includes an exposed portion extending radially outward from the bicycle wheel when engaged therewith. The exposed portion is externally configured to define a partial, non-circular ellipse in a cross sectional plane perpendicular to the tangent of the outer periphery. The partial ellipse includes a closed end portion at the outer periphery and an open end portion adjacent the bicycle wheel. A plurality of nubs is attached to the tire body, with the nubs being configured to remain attached thereto during the life of the bicycle tire. The nubs are sized and configured to enhance the aerodynamics of the bicycle tire as the tire rotates and translates through a fluid.

The invention discloses a narrow deep-loosening rotary cultivator which comprises a frame body connected with a tractor, a bevel gear commutator and a rotary blade, wherein the bevel gear commutator and the rotary blade are arranged on the frame body and are connected with a universal spindle coupling at the tail of the tractor. The rotary blade is connected with a liftable mechanism of the tractor through a rack. The narrow deep-loosening rotary cultivator is characterized in that a shallower prying plow and a deeper prying plow are arranged in front of and behind the position, in front of the rotary blade, of the frame body respectively, a prying saw tooth connection rod with saw teeth and a shallower prying plow connection rod with saw teeth are further arranged, one end of the prying saw tooth connection rod is connected with an eccentric shaft output by the commutator, the other end of the prying saw tooth connection rod is connected with a deeper prying plow and the shallower prying plow connection rod, the shallower prying plow connection rod is connected with the shallower prying plow, and the other end of an output shaft of the bevel gear commutator is connected with the rotary blade through a chain wheel and a chain. The efficient deep-loosening rotary cultivator of the structure saves overall cultivation energy consumption and achieves the protective cultivation purpose.

The invention discloses a groove roller-type cable pipe mouth sheath device. The groove roller-type cable pipe mouth sheath device comprises a pipe mouth baffle ring and a positioning short pipe, wherein the positioning short pipe is inserted into a cable protection pipe, a plurality of roller bases are arranged on an inner wall of the positioning short pipe, an arc groove roller is arranged between adjacent roller bases by a roller shaft, the groove arcs of the plurality of groove rollers are concentric with equal radius, preferably, and an angle of a fan-shaped coverage region of the plurality of groove rollers in the cable protection pipe is larger than or equal to 120 degrees. The grove roller-type cable pipe mouth sheath device has the beneficial effects of simple structure and low fabrication cost, can be repeatedly used and is convenient to carry and disassemble; sliding friction between a cable at a cable protection pipe inlet and the cable protection pipe is changed to rollingfriction, the resistance during the construction process is greatly reduced, meanwhile, direct contact of the cable and the cable protection pipe is prevented, and the risk that the cable is damagedis reduced.

The invention provides emergency efficient fireproof concrete pug agitating equipment and an application method thereof, belonging to the field of application of unshaped fireproof materials, and particularly relates to an emergency efficient fireproof concrete pug agitating method. The emergency efficient fireproof concrete pug agitating equipment is characterized by comprising a stainless steel boat, a pulling rope and an attaching type high-frequency vibrator, wherein the stainless steel boat is in a box shape with an opened upper end; the stainless steel boat is provided with a hanging ring; the hanging ring is connected with the pulling rope; the stainless steel boat is internally provided with the attaching type high-frequency vibrator. The agitating equipment provided by the invention is portable and practical; the equipment is combined with manual agitation so as to obtain high-quality mixed agitated fireproof concrete pug.

The invention relates to the technical field of automobiles, in particular to a Hybrid transmission and vehicle using the same . The hybrid transmission comprises an engine, an electric motor and an output shaft of a planetary gear mechanism; A first clutch is arranged between the crankshaft of the engine and the rotor of the electric machine for engaging or disengaging the crankshaft of the engine and the rotor of the electric machine; A second clutch and a third clutch are provided between the rotor of the motor and the planetary gear mechanism for engaging or disengaging the rotor of the motor and the planetary gear mechanism to achieve four to six shifts. The hybrid vehicle of the invention comprises the hybrid transmission, which can reduce the drag resistance of the engine to the electric motor when the electric motor is driven, and improve the fuel economy; At that same time, the engine and the electric motor can be simultaneously use for driving, so that the acceleration pow performance of the vehicle can be improved.

The invention discloses an energy-saving combination power system of an engine of an automobile. The system is characterized in that an auxiliary clutch is arranged between a main clutch of the automobile and a speed changer; the main clutch is separated and the auxiliary clutch is combined when the automobile decelerates and slides; a primary air compressor, a driving wheel of a high-speed one-way gear and a driven wheel of the high-speed one-way gear are driven to a main air compressor, an air conditioning compressor and a power generator which are connected with an accessory transmission shaft by sliding inertia energy of the automobile to allow the main air compressor, the air conditioning compressor and the power generator to operate at a high speed for converting energy of the engine; power of the engine is transmitted to a sliding sleeve gear, a speed reducing gear, a driving wheel of a crankshaft one-way gear and a driven wheel of the crankshaft one-way gear which are connected with the accessory transmission shaft to drive an engine crankshaft to operate at a low speed, so that dragging resistance when the engine operates passively is reduced. When the engine accelerates to operate to drive the automobile, the auxiliary clutch is separated, the power of the engine is reduced by a crankshaft gear, a driving wheel of a speed reducing one-way gear, and a driven wheel of the speed reducing one-way gear, and then drives related accessories connected with the accessory transmission shaft to operate at a low speed, so that power consumption of the engine is reduced.

The invention discloses a novel tensile special cable, and the cable comprises at least one conductor unit, a tensile cable and a filling layer. The conductor unit comprises a cable core and a split-phase insulating isolation layer, wherein the split-phase insulating isolation layer is set around the cable core. The tensile cable is located at the center of the cable, and the filling layer is disposed outside the tensile cable. The conductor units are arranged around the tensile cable, and are distributed in the filling layer. One side, far from the tensile cable, of the filling layer is provided with a fireproof isolation layer, and one side, far from the tensile cable, of the fireproof isolation layer is provided with a reinforcing layer. One side, far from the fireproof isolation layer,of the reinforcing layer is provided with an impact-resistant layer, and one side, far from the reinforcing layer, of the impact-resistant layer is provided with an outer protection sheath. The reinforcing layer comprises a flame-retardant oxygen isolating layer and an armored layer wrapping the flame-retardant oxygen isolating layer in an annular manner.

The invention discloses a cuff sewing machine, which comprises a table; a flat seaming machine is fixedly arranged on the table, the flat seaming machine is provided with a needle plate platform; unlike the prior art, the cuff sewing machine also comprises a rotary supporting mechanism; the rotary supporting mechanism can support or loosen sleeves and cuffs stacked together and enable the sleevesand the cuffs to rotate in a reciprocating mode and to slide on the upper surface of the needle plate table of the flat seaming machine. Compared with the prior art, the cuff sewing machine has the advantages that manual sewing of cuffs can be replaced, the efficiency is high, and the cuff sewing machine has the capacity the same as that of about tens workers.

The invention discloses a cable which comprises an outer protective layer, a movable sleeve block is arranged in the outer protective layer, an inner protective mounting block is arranged in the movable sleeve block, conductive cores are evenly and fixedly connected in the inner protective mounting block, and movable sliding grooves are evenly formed in the periphery of the interior of the movablesleeve block. Damping sliding blocks are slidably connected into the movable sliding grooves correspondingly, the ends, away from the movable sliding grooves, of the damping sliding blocks are fixedly connected with the inner protection mounting blocks, dragging shoveling mechanisms are evenly and fixedly connected to the outer surface of the outer protection layer, and impact protection mechanisms are evenly and fixedly connected to the positions, located between the dragging shoveling mechanisms, of the outer surface of the outer protection layer. And a pressure dispersion mechanism is fixedly connected to the position between the outer protective layer and the movable sleeve block. The invention relates to the technical field of cables. According to the cable, mechanical impact force is converted into air pressure, the air pressure is uniformly applied to the outer surface of the cable, local impact is dispersed, and impact damage is reduced to the minimum.

A plastic-coated hose easy to pull and resistant to abrasion comprises an outer plastic layer, a woven bag and an inner plastic layer, wherein the woven bag is arranged between the outer plastic layer and the inner plastic layer, and an abrasion-resistant protruding body is arranged on the outer surface of the outer plastic layer. The structure not only improves the abrasion resistance of the plastic-coated hose, reduces the pulling resistance of the plastic-coated hose, but also improves the pressure resistance of the plastic-coated hose, and prolongs the service life.

An automatic transmission device for a vehicle includes a first planetary gear mechanism, a second planetary gear mechanism, a third planetary gear mechanism, a fourth planetary gear mechanism, an input shaft, an output shaft, six engaging elements including a first engaging element, a first clutch, a second clutch, a third clutch, a first brake and a second brake, a first connection member, a second connection member, a third connection member, a fourth connection member, a fifth connection member, and a sixth connection member. Nine forward speeds and one reverse speed are provided by an engagement of three engaging elements of the six engaging elements.

The invention belongs to the technical field of wind resistance and oil removal, and particularly relates to anti-wave oil suction environment-friendly equipment which comprises a ship body and oil suction devices, and the two oil suction devices are symmetrically installed on the two sides of the rear portion of the ship body; when a front oil collecting arm and a rear oil collecting arm are driven to move forwards along with the ship body, the front oil collecting arm and the rear oil collecting arm can drive corresponding swing plates to move through connecting plates on the lower sides of the front oil collecting arm and the rear oil collecting arm, the swing plates move to drive a mounting plate to move, and the mounting plate moves to drive a floating block on the lower side to move to scrape an oil film on the water surface; due to the fact that the floating block floats on the water surface, the resistance of the floating block driven to move is much smaller than that of a traditional mode that oil collecting arms are directly sunk in water, the dragging resistance of the ship body is greatly reduced, and the cost of the oil suction devices is reduced. When the oil suction devices are folded, the rear oil collecting arm, the second swing rod and extraction equipment can be folded to be tightly attached to one another and close to an up-down overlapping state, the size of the folded oil suction devices is greatly reduced, and the anti-wave oil suction environment-friendly equipment is convenient to carry.

The invention relates to an outer ring anti-napping side roller support bearing and an eighteen-high mill thereof. The outer ring anti-napping side roller support bearing comprises an inner ring shaft, a support outer ring and a retainer, wherein the retainer is arranged between the inner wall surface of the support outer ring and the outer wall surface of the inner ring shaft; a first radial clearance M is formed between the outer ring surface of the retainer and the inner wall surface of the support outer ring; a plurality of pockets are formed in the retainer, pin rollers are respectively installed in the pockets, and notches are formed in the pockets in the outer surface of the retainer; second radial clearances N are formed between the pin rollers and the notches; the first radial clearance M is less than the second radial clearance N; and a friction contact surface is formed on the outer ring surface of the retainer. The clearance between the retainer and the outer ring is adjusted, so that the support outer ring can make contact with a part of the friction contact surface of the retainer when the support outer ring rotates during operation, the retainer is directly driven torotate by the support outer ring, the drag resistance of the retainer to each pin roller is reduced, and the operating resistance of the whole bearing is reduced.