350results about How to "Small inertia force" patented technology

An ultra-large truss type floating marine platform is composed of floating drums dispersed on water surface, a working platform above water surface, and connecting rods. Its advantage is high stability.

he invention relates to a foam cement insulation board and a preparation method thereof, and provides a foam cement insulation board containing industrial solid wastes and a preparation method thereof. The foam cement insulation board is composed of a mixture A and a mixture B. The mixture A comprises 55-65% of cement, 10-20% of gypsum powder, 8 -15% of hydrogen peroxide,3-4% of a flocculant, 1-2% of a water reducing agent, 1-2% of a coagulant, 2-3% of a cement waterproof agent, 1-2% of lithium carbonate, 1-2% of fiber, and 1-2% of solid master batch. The mixture B comprises 35-47% of a base material, 35-39% of a magnesium chloride solution, 10-15% of magnesium oxide, 2-5% of a binding agent, 2-3% of industrial hydrogen peroxide, 1-2% of lanthanide rare earth and 5-7% of an additive. The Foam cement insulation board provided by the invention has advantages of fireproof, waterproof, light weight, compressive and flexural resistance and high strength, and effectively utilizes industrial solid waste, facilitates environmental protection, and truly realizes turning wastes into treasures.

The invention relates to a linear motor-driven plunger pump. The mechanical part of the plunger pump comprises a cylinder body I, a cylinder body II, flow distribution valves, an in-sucking communication pipe, out-pressing communication pipes, compacting flanges, plunger rods, linear motor stators, linear motor rotors and guide rails; and the electric part mainly consists of linear motors, a controller, drivers and a position feedback device. The linear motor-driven plunger pump is characterized in that a group of coil-type stators drive a permanent magnet rotor in a combinational way, thus realizing high thrust output of the linear motors. Each flat-type linear motor drives two plungers at the two ends of one plunger rod, and while the double-action plunger rod reciprocates, one end of the double-action plunger rod sucks water and at the same time the other end of the double-action plunger rod presses water. The two cylinders realizes the effective communication between the water sucking loop and water pressing loop of the plunger pump by means of the in-sucking communication pipe and the two out-pressing communication pipes. Each plunger hole is communicated with a flow distribution valve consisting of an in-sucking valve and an out-pressing valve. The electric part controls the out-of-phase movement of the linear motors, thus ensuring the stable combinational flow output of the pump. The linear motor-driven plunger pump disclosed by the invention has the advantages of less mechanical transmission links and high system efficiency and reliability.

The invention relates to an intelligent robot capable of high-speed feeding and discharging. An existing feeding and discharging device is complicated to operate. Accordingly, the intelligent robot capable of high-speed feeding and discharging comprises a stand column and a cross arm, wherein the stand column s provided with a vertical linear guide rail, a lifting block is arranged on the vertical linear guide rail, the cross arm is fixed to the lifting block, the lifting block is driven by a ball screw pair, lead screws of the ball screw pair are driven by a lifting servo motor and sleeved with nuts of the ball screw pair, and the nuts and the lifting block are fixed together. The cross arm is provided with a horizontal linear guide rail provided with a slide block, a telescopic arm is fixed to the slide block, a sucker rack or a manipulator grabbing device is fixed to the front end of the telescopic arm, the slide block is driven by a ball screw pair, lead screws of the ball screw pair are driven by a telescopic serve motor and sleeved with nuts of the ball screw pair, and the nuts and the slide block are fixed together. The intelligent robot has the advantages of being convenient to use, safe and efficient, thereby being suitable for various production enterprises needing workpiece carrying.

A dropper fatigue testing machine comprises an upper strutting piece, a lower strutting piece, a force application part, a force buffer part and a sensor. The force application part is arranged on the lower strutting piece, the force application part is arranged on the upper strutting piece, the sensor is fixedly arranged on a pulling force buffer part, a dropper sample is arranged between the force application part and the force buffer part, the bottom end of the dropper sample is in contact connection with the top portion of the force application part, and the top end of the dropper sample is fixedly connected with the bottom portion of the force buffer part. A high-speed electric cylinder performs loading and unloading of the dropper sample from down to up, and the speeds and the displacements of the loading and the unloading in each phase can be controlled through a pretext computer program. The completion of the compression in half sine wave and the buffer inertia force of the dropper sample in the declining process are realized. The dropper sample is clamped to simulate the forced state of the dropper in a carrier cable, a spring is employed to replace the carrier cable, a buffer spring is located at a vertical position, the upper end of the buffer spring is fixed, the lower end of the buffer spring is floated, and the buffer spring is effected on the inertia force on the dropper sample.

The invention provides a lubricating oil composition for a motorcycle shock absorber. The lubricating oil composition comprises the following components in percentage by weight: 1-20% of viscosity index improver, 0-1.0% of extreme-pressure antiwear agent, 0.05-1.0% of antioxidant and antiwear agent, 0.001-0.01% of demulsifier, 0.0001-0.01% of antifoaming agent, 0.05-1.4% of pour point depressant and the balance of base oil. According to the invention, the lubricating oil composition has the advantages of proper viscosity index, good viscosity-temperature performance, good low-temperature property, excellent rubber compatibility, and good corrosion resistance and oxidation resistance, and can be also used for lubricating a bicycle saddle shock absorber.

The invention relates to an aerated concrete wall material and a preparation method thereof, in particular to an aerated concrete wall material containing river silt and a preparation method thereof. The aerated concrete wall material comprises the following main components in percentage by weight: 60-75% of river silt, 1-10% of cement, 13-28% of lime, 1-2% of gypsum powder, 6-10% of aluminum powder and 2-11% of foam stabilizing agent, and the sum of weight percentages of the components is 100%. In the invention, river silt dug out by regulating the Yangtze River can be effectively utilized, energy is saved, emission is reduced, the ecological environment is protected, and the processed aerated concrete wall material also has high compressive strength and high bending strength.

The invention provides an active protection system and a method thereof for preventing secondary damage of pedestrians, belongs to the technical field of automobiles and solves the problem that pedestrians are not efficiently protected when vehicles and pedestrians collide in the prior art. The active protection system comprises a vehicular control unit, a collision sensor, an automobile forward sensor, a pedestrian protection air bag device and a capture device. The method includes steps of A, detecting collision acceleration of the collision sensor, and detecting property and prior-collision motion states of an object to be collided by the automobile forward sensor; B, controlling the pedestrian protection air bag device to inflate and unfold an air bag when collision intensity exceeds the threshold; C, predicting flight path of the object according to the collision strength and the collision position, so as to correspondingly simulate moving track parameters of a current capture net and controlling the capture device to capture and wrap the object according to the moving track parameters of the current capture net. By the active protection system and the method thereof, secondary damage to the pedestrians can be effectively prevented, and safety of the pedestrians is protected to the greatest extent.

A three-transfer-one-shift four-degree-of-freedom heavy-load static-balance parallel motion simulation stand mechanism mainly comprises a basic platform, a motion platform, a load-bearing platform, four driving branches in identical structures and three balancing branches in identical structures. The four driving branches are connected with the motion platform and the basic platform to form a parallel driving mechanism. The three balancing branches are connected with the load-bearing platform and the basic platform to form a parallel balancing mechanism. The four driving branches are in uninterrupted power supply (UPS) structures and are composed of electric cylinders, first spherical hinges and universal hinges. The balancing branches are in RPS structures and are composed of balancing hydraulic cylinders or balancing air cylinders, first revolving pairs and second spherical hinges. The motion platform is connected with the load-bearing platform through a second revolving pair. The mechanism is high in bearing capacity, fast in dynamic response speed, simple to control, capable of preventing the three balancing branches from generating moments of rotation around a shaft and reducing the inertia force (moment) of a parallel load-bearing mechanism simultaneously and applicable to motion simulation of large devices, and the mechanism can be used indoors or in a field environment.

The NC processing machine has the Y-axial cutting tool mounted on a slider which is arranged in a sliding base on a X-axial table and reciprocates in the Y-axial direction. This NC processing machine cuts the work into the prescribed processing configuration with the Y-axial cutting tool while the slider is reciprocating in synchronism with rotation of a main shaft 10, and then polishes a processing surface of the work by a buff of the polishing unit in accordance with configuration of a program surface of the work without change in a grasping state of the work with a chuck device .

An apparatus for checking the diameter of crankpins (18) of a crankshaft (34) in the course of the machining in a grinding machine comprises a first arm (9) rotating with respect to a support (5) arranged on the grinding-wheel slide (1) of the grinding machine, a second arm (12) rotating with respect to the first, a reference device (20) carried by the second arm and a measuring device (16, 17, 40-45) associated with a reference device. A guide device (21), fixed to the reference device (20), enables the apparatus to engage a crankpin, in the course of the orbital motion of the crankpin, and limit the displacements of the first arm and those of the second arm when a control device (28-30) displaces the apparatus to a rest position.

The invention discloses a splash-proof take-out box based on magnetic repulsion force levelling and resetting, and relates to the technical field of take-out boxes. The splash-proof take-out box basedon magnetic repulsion force levelling and resetting comprises a box body and a box cover, the back side of the bottom of the box cover is connected to the back side of the top of the box body in a sewing mode, the front side of the bottom of the box cover is connected to the front side of the top of the box body in a lap-joint mode, a containing plate is arranged over the inner bottom of the boxbody, the four sides of the top of the containing plate are fixedly connected with the four sides of the bottom of a baffle, and a movable rod is arranged over the containing plate. According to the splash-proof take-out box based on magnetic repulsion force levelling and resetting, the movable rod, a horizontal rod and a weighting ball are arranged in the box body, then the baffle drives the containing plate to tends to be horizontal, the containing plate is pushed through the repulsion force between first magnets and magnetic strips when the containing plate is too oblique, the auxiliary balancing effect is achieved, and the condition that soup in food products spills when the take-out box is oblique is avoided.

A numerical control (NC) processor with an onboard grinding unit is disclosed in which a workpiece is first cut in a preselected contour with a Y-axis cutting tool, and then subjected to honing operation intact whereby both the cutting and honing operations can be performed with just a single processor with high-speed, high-acceleration. With the NC processor, the Y-axis cutting tool is mounted on a sliding base above an X-axis table in a way allowed to move back and forth in a Y-axis direction, while a grinding unit is installed in close proximity to the sliding base. A slider moves back and forth in synchronized relation with rotation of a work spindle to first let the Y-axis cutting tool cut the workpiece into a preselected contour, and then cause a buffing material of the grinding unit to grind a work surface of the workpiece into a high-quality surface finish in conformity with a programmed contour while the workpiece remains held intact in a chucking device.

The invention relates to an autoclaved aerated concrete building block and a preparation method thereof, in particular to an autoclaved aerated concrete building block containing industrial solid waste and a preparation method thereof. The autoclaved aerated concrete building block containing industrial solid waste comprises, by weight percent, 35%-47% of base material, 35%-39% of magnesium chloride solution, 10%-15% of magnesium oxide, 2%-5% of binder, 2%-3% of industrial hydrogen peroxide, 1%-2% of lanthanide rare earth, and 5%-7% of additive. The autoclaved aerated concrete building block has the advantages of fire prevention, water proofing, moth prevention, lightness, crush resistance, bending resistance, high strength, moss avoidance and the like. The proportion of the materials determines the water proofing and moth prevention. The fire prevention meets the standard (class A) of nonflammable materials. The crush resistance is larger than 53Mpa. The bending resistance is larger than 80Mpa. In addition, the industrial solid waste is effectively utilized, wastes are utilized, environment is protected, and the wastes are turned into wealth.

The invention relates to the technical field of manipulators and discloses a feeding and discharging connecting rod manipulator with a tail end turnover function. The feeding and discharging connecting rod manipulator with the tail end turnover function comprises a base rotating mechanism, a mechanical arm, a transmission mechanism, a wrist turnover mechanism and pneumatic fingers, wherein the mechanical arm is composed of a large arm and a small arm; the base rotating mechanism comprises a base, a base rotating disc, a reducer, a base rotation driving motor, a left mounting vertical plate anda right mounting vertical plate; the transmission mechanism is composed of a large arm driving motor, a small arm driving motor, a reducer, a transmission crankshaft, a small arm drawbar, a rivet base, a fixing drawbar, a triangular connecting plate and a wrist drawbar, and the large arm driving motor and the small arm driving motor are mounted on the left mounting vertical plate and the right mounting vertical plate respectively; the wrist turnover mechanism is composed of a flange base and a swing cylinder; the pneumatic fingers are composed of pneumatic finger bodies and a pneumatic fingermounting support. According to the feeding and discharging connecting rod mechanical arm with the tail end turnover function, all the driving motors are mounted on a base, so that arm structures canbe simplified and arm weight can be reduced; during motion of the feeding and discharging connecting rod mechanical arm with the tail end turnover function, the flange base the tail end of the manipulator can stay unchanged in posture relative to the base, so that the difficulty in controlling a tail end executor can be reduced.

The invention discloses a rotary vane compressor and relates to a rotary vane compressor for a vehicle air conditioner, in particular to a rotary vane compressor for an air conditioner on a sedan car, an SUV, a mini bus and a light / heavy truck. The compressor comprises a cylinder body, a rotor, vanes, a front end cover and a back end cover, wherein symmetrical working cavities are formed by the center line of the cylinder body and the contour in the cylinder body; and on any cross section of each working cavity, a first circular arc section contour, a first vane extension section contour, a second circular arc section contour, a first vane constriction section contour, a third circular arc section contour, a fourth circular arc section contour, a second vane extension section contour, a fifth circular arc section contour, a second vane constriction section contour and a sixth circular arc section contour are sequentially distributed along the contour of a rotor angle of 0-360 degrees in the counterclockwise direction, and the tail end of each section contour form smooth connection with the head end of the adjacent contour. The compressor increases the displacement, improves the compression efficiency and the volume efficiency, ensures that the moving speed and acceleration of the vanes are not subject to sudden change, realizes that the vanes do not impact the cylinder body and simultaneously improves the sealability between the cylinder body and the rotor.

A swash plate double-headed piston compressor comprises a spindle (8), a swash plate (7), a front cylinder body (1) and a back cylinder body (2); a plurality of piston chambers are arranged between the front cylinder body (1) and the back cylinder body (2), each piston chamber is provided with a double-headed hollow piston (5), the swash plate (7) is arranged on the spindle (8); the compressor is characterized in that the double-headed hollow piston (5) is symmetrically provided with two small hemisphere pits, each small hemisphere pit is internally provided with a small hemisphere (6), the swash plate (7) is inserted into the place between the two small hemispheres (6), and the heights of the two small hemispheres (6) plus the thickness of the swash plate (7) are less than the spherical diameter of the small hemisphere (6); the swash plate (7) is provided with an air pressure support ring slot for compensating and bearing load; the double-headed hollow piston (5) is provided with a piston ring (10) for supporting with diameter being less than that of the inner diameter of the piston chamber; a wear-resistant layer is arranged on the panel where the swash plate (7) is contacted with the small hemisphere (6). The invention has the advantages of simple structure, convenient manufacture and installation, long service life and high efficiency.

The invention provides a double-deck elevator car facility, which can effectively detect anomalies in ropes for driving an upper car and a lower car without any specially-equipped device. The double-deck elevator car facility comprises a plurality of sockets (16) for accommodating and fixing the end parts of ropes (153) for driving the upper car and the lower car, a plurality of rod members (18) connected with the sockets (16), a hanger plate (19) where the rod members can traverse, a plurality of nuts (20a,20b) screwed with the rod members (18) and a plurality of springs (21) equipped between the nuts and the hanger plate. The upper part of the nuts is provided with a check-out console (23) capable of moving vertically and a switch (24) for checking the displacement of the check-out console. When an anomaly occurs on the ropes, the springs are stretched and push the check-out console upwards through the nuts. The switch is then operated for noticing the anomaly of the ropes.

The invention discloses an expansion scraper blade plate-type conveyer, two ends of a frame are respectively mounted with a head pulley (7) and a tail pulley (1), a conveying chain (2) rounds the headpulley (7) and the tail pulley (1), supporting of the conveying chain (2) is located on a guide rail (4) of the frame, a lath (3) is fixed on the conveying chain (2), the expansion scraper blade is arranged on the conveying chain (2) and comprises a scraper blade (5), guide plates (9), connecting plates (13) and springs (14), a group of guide plates (9) are mounted on the conveying chain (2) at intervals, the scraper blade (5) is arranged among the guide plates (9), the connecting plates (13) are mounted at two sides of the scraper blade (5) in symmetry, at least one end of the two springs (14) is connected to the connecting plates (13), and the other end of each spring (14) is connected to the guide plates (9) and the scraper blade (5). The conveyer is used for conveying materials in bags at a large inclination angle, and is convenient to shift in a warehouse by smaller radius of gyration.

The invention relates to a rotary motion and reciprocating motion converting device (20) which comprises pistons (72, 74, 76, 78), wherein one end of each piston rods (62, 64) is connected with the pistons (72, 74, 76, 78); a shell (25) is installed on a base seat (11); a side wall (28) of the shell (25) is provided with a bearing seat (5); a transmission shaft (6) is installed in the bearing seat (5); the transmission shaft (6) is provided with transmission wheels (15, 17); the edge parts of the transmission wheels (15, 17) are provided with column pins (7, 71) extending out axially; a first gear (10) and a second gear (14) which can rotate relative to the transmission shaft (6) are installed close to the transmission wheels (15, 17); the first gear (10) and a first rack (2) are meshed mutually; the second gear (14) and a second rack (22) are meshed mutually; the first rack (2) and the second rack (22) are respectively positioned at two sides of the transmission shaft (6); connecting plates (90, 91) are connected with the end parts of the first rack (2) and the second rack (22); the connecting plates (90,91) are connected with other ends of the piston rods (62, 64); tooth-free parts of the first gear (10) and the second gear (14) are respectively provided with pin grooves (9, 21); the pin grooves (9, 21) are internally provided with sliding blocks (32, 42) which are matched with the column pins (7, 71); and the restoration springs (12, 121) are arranged below the sliding blocks (32, 42). Thus the conversion between the rotary motion and the reciprocating motion is realized.

A planetary gear train type rice seedling transplanter is disclosed. A left and a right gear boxes are driven by a central sprocket in a sprocket case for making them rotate. Two cylindrical planetary gears engaged with the static central cylindrical gear in the said gear box rotate with the gear box to drive the coaxial elliptical gear to rotate, and the said elliptical gear is further engaged with the elliptical planetary gear, so resulting in that the said elliptical gear rotates at non-uniform speed relatively to the gear box. The absolute movement of a transplanting arm pair is the composition of the circumference movement of gear box and the non-uniform movement of elliptical planetary gear. Its advantages are low inertial force, no damage to rice seedlings and reasonable structure.

The sander for sanding particularly of the flat, concave and convex surfaces and the method of its usage is based on the fact, that the sanding tool (paper, linen or other carrier with sanding abrasive layer) is pressed onto the grinded surface by means of a flexible pressure plate able to copy the concave and convex surfaces with the possibility to set accurately the radius of this curve. The principle of the technical solution of the invention of the flexible pressure plate consists in the fact, that the pressure generated during the work onto the body, handle, or handles of the sander with mechanical drive is transferred onto this pressure plate at least at two points simultaneously or over at least one balance beam.

An energy dissipation, shock absorption and anti-liquefaction rigid and flexible slide-resistant pile and a construction method belong to the slope supporting technology field. The energy dissipation, shock absorption and anti-liquefaction rigid and flexible slide-resistant pile is composed of a hollow tubular pile, broken stones, anchor cables and air cushions, wherein the hollow tubular pile comprises first-type hollow tubular piles and second-type hollow tubular piles, which are all prefabricated with reinforcement concrete; crossed plates are embedded in an external barrel; water permeating holes are formed in the external barrel in a plum blossom shape; anchor cables penetrate through the hollow tubular piles and the air cushions are covered at the outer side; one first-type hollow tubular pile and many second-type hollow tubular piles are arranged in sequence in the pile holes of a slope body; the tops and the bottoms of the hollow tubular piles are embedded with one another; the hollow tubular pile is filled with the broken stones and a cover plate is arranged on the top; the anchor cables are anchored on the bottom plate and the cover plate through an anchorage device and the air cushions are full of gas. The slide-resistant pile is prefabricated, assembled and formed to be a rigid and flexible body, has high load-bearing capacity, plays a role in well dissipating energy under earthquake condition, has good drainage capacity and prevents soil around the pile from being liquefied; the construction method is simple and quick and the engineering cost is low.

The invention discloses a rotary transplanting device of a pot seedling transplanting machine. Power is output by a sprocket shaft and transferred to a left planetary carrier system transplanting device and a right planetary carrier system transplanting device. A planetary carrier is driven by the sprocket shaft, a non-circular sun gear is fixedly connected with a sprocket box and is stationary in work, and a middle non-circular gear and a planetary non-circular gear are symmetrically arranged at both sides of the non-circular sun gear. The extending end of a planetary axle is upwards articulated with an inner half transplanting nozzle and an outer half transplanting nozzle which are respectively provided with a groove and a pin for realizing the centering opening of the transplanting nozzles. The transplanting nozzles are opened by the relative rotation of a roller on the inner half transplanting nozzle and an end surface cam fixed on the planetary carrier and closed by springs mounted on the inner half transplanting nozzle and the outer half transplanting nozzle. By a non-circular gear planetary system, the uniform rotation of the sprocket shaft is turned into the swinging absolute motion of the planetary axle to form an orbit and a stance which are needed by the transplanting nozzles on the planetary axle and satisfy the agricultural requirement of pot seedling transplantation.

The invention belongs to the field of automobiles, particularly provides an electric vehicle and a dual-motor planet gear power transmission system thereof and is intended to solve at least one of theproblems of the prior art that wheels of an electric vehicle driven by a single motor cannot output high torque through a reducer and wheels of the electric vehicle driven by the single motor are unsuitable for independent adjustment of driving torque. The dual-motor planet gear power transmission system mainly comprises two power transmission subsystems which are identical; each power transmission subsystem includes a motor and a reducer arranged on an auxiliary frame, and the motor is connected with an axle shaft of the electric vehicle through the reducer such that wheels can be driven torotate. Each reducer mainly includes a single-stage cylindrical gear reduction mechanism and a planet gear reduction mechanism which are in driving connection, the two mechanisms enable the reducer togain a high reduction ratio at the premise of compact layout space, and therefore, the electric vehicle can gain better low-speed performance.

The invention relates to the technical field of wind drag rowing machines, in particular to a wind drag rowing machine small in inertia force. The wind drag rowing machine comprises a sliding device, a main frame, a drag device and a movement device. The drag device comprises a sheet metal fan wheel set and a permanent magnet, the sheet metal fan wheel set is movably arranged on the main frame, and the permanent magnet is arranged on the circumferential outer side of the sheet metal fan wheel set through a preset gap. The movement device comprises a spring coiling box, a unidirectional rotating wheel set, a fixed central spindle, a traction belt and a holding rod. The fixed central spindle is sequentially connected with the rotation center of the sheet metal fan wheel set, the rotation center of the spring coiling box and the rotation center of the unidirectional rotating wheel set and is movably arranged on the main frame, and the spring coiling box is fixedly connected on the main frame. One end of the traction belt is connected with the unidirectional rotating wheel set, and the other end of the traction belt bypasses a belt wheel fixed on the main frame and is connected with the holding rod. The wind drag rowing machine is small in inertia force when pulled, and an ideal body-building purpose can be achieved.

The invention discloses an automatic grabbing and transferring device for multi-size flexible raw tires. The device comprises a clamping device and a transferring device, wherein the clamping device comprises a clamping frame assembly, a transmission device and telescopic devices; the transferring device comprises a rotating base, a rotating device, a telescopic device and a lifting device; the transmission device is arranged at the middle position inside the clamping frame assembly; the telescopic devices of the clamping device are arranged at the edge position inside the clamping frame assembly; the clamping frame assembly is arranged on the lifting device of the transferring device; the lifting device is arranged at the front end of the telescopic device; the telescopic device of the transferring device is arranged on the rotating device; and the rotating device is arranged on the rotating base. According to the automatic multi-size flexible raw tire grabbing and transferring device, the structure is simple, the overall mass is small, the load of a mechanical arm is reduced, the inertia force is small, and the working stability is improved; and the device is suitable for grabbing raw tires with different inner diameters, thus, the production efficiency of tires, especially small-batch tires, is improved.

The invention discloses an engine transmission mechanism capable of replacing crankshafts and connecting rods. The engine transmission mechanism comprises sector gears, racks and rotary arms. Each sector gear is mounted at an end of a spindle, the racks can slide on guide plates and can be reset by the aid of the rotary arms, the racks and the gear sectors are alternately meshed with one another, the spindles can rotate along with the driving sector gears and output power, journals on the side surfaces of the sector gears and resetting round bars on the side surfaces of the racks alternately drive the rotary arms by the aid of journal slide grooves and reset slide grooves to swing in a reciprocating manner, the journal slide grooves and the reset slide grooves are formed in the rotary arms, end teeth at one end of each sector gear are separated from end teeth at one end of the corresponding rack when pistons are positioned at lower dead centers, collision of the journals and ports of the journal slide grooves can be prevented by the journals by the aid of guide grooves of the rotary arms, collision of end teeth at the other end of each sector gear and end teeth at the other end of the corresponding rack can be prevented by the journals by the aid of the guide grooves when the pistons cross upper dead centers, and accordingly reciprocating linear movement of the pistons and rotation movement of the sector gears can be stably switched over. The engine transmission mechanism has the advantages that the engine transmission mechanism can replace crankshaft and connecting rod transmission actuators, accordingly, inherent shortcomings of crankshaft and connecting rod mechanisms can be overcome, and the conversion efficiency of engines can be greatly improved.

The invention discloses a cavitation roller capable of continuously making caves to plant cotton nutritive bowls by rotation, belonging to the agricultural machinery. The cavitation roller comprises knife roller assemblies, eccentric adjustment devices, bearing blocks and a mandrel. The knife roller assemblies are installed on the mandrel, the eccentric adjustment devices are installed at one sides of the knife roller assemblies, and the bearing blocks are installed at both ends of the mandrel. Compared with the prior art, the cavitation roller has the characteristics of small inertia force of the structure during working, capability of continuously making caves, accurate cave spacing and line spacing, uniform cave depth, low possibility of cave wall collapse and the like, improves the cave making efficiency and reduces the labor intensity.

The invention relates to a novel slide-resistant pile structure superior in seismic performance and an implement method of novel slide-resistant pile structures superior in seismic performance. The novel slide-resistant pile structure is composed of a reinforced concrete slide-resistant pile body, reinforced concrete retaining walls and an EPS filling layer. The implement method of the novel slide-resistant pile structures comprises the steps that pile pits of reinforced concrete slide-resistant pile bodies are excavated one by one, the retaining wall is arranged timely when one pile pit is excavated until the pile pit is excavated to the designed elevation, pre-cast blocks of the EPS filling layers are upwards installed one by one to the elevation of the pile top from the elevation of each pile pit bottom, and reinforcement cage binding and concrete pouring and maintenance are carried out on the reinforced concrete slide-resistant pile bodies. The novel slide-resistant pile structure superior in seismic performance and the implement method of the novel slide-resistant pile structures superior in seismic performance have the advantages that the pre-cast blocks of the EPS filling layers are low in price, can be produced in a standardization mode and are convenient to assemble on site. The novel slide-resistant pile structure is an organic whole combining rigidness with softness, not only can the requirement for resisting landslide thrust be met, but also the good energy dissipation function under the earthquake working condition can be achieved, and then the seismic performance of the structure is improved.