31results about How to "Achieve U-turn" patented technology

The invention relates to a suspension-type dry land laser land leveler, which comprises a three-point suspension apparatus, a land-leveling unit, a floating unit and an elevation adjusting apparatus,the land-leveling unit is connected with a tractor through the three-point suspension apparatus, the land-leveling unit is hinged to the floating unit, the elevation adjusting apparatus is installed between the land-leveling unit and the floating unit, the floating unit is supported on the field surface, the land-leveling unit rises and falls relative to the floating unit by the elevation adjusting apparatus, the floating unit includes spiral supporting wheels, the spiral supporting wheels are hollow spiral strip structures, and the width of the spiral supporting wheels corresponds to the land-leveling width of the land-leveling unit. The invention also relates to a suspension-type dry land laser land-leveling method. The spiral supporting wheels are used as a lifting apparatus of a land-leveling shovel, supporting surface is enlarged, and the field surface is uniform in stress. The land-leveling shovel is lifted by the tractor three-point suspension manner and retreats to a field corner to realize field corner leveling. The land leveler and the land-leveling method are suitable for precise laser land-leveling operation in a small area, and belong to the technical field of farmland-leveling machines.

Straight bridge lane-changing overpass of the present invention comprises the low-height straight bridge lane-changing bridge (7,8) that is located at two 1 / 2 passing heights of intersecting road longitudinal direction, 2 cuttings (14,15) of 1 / 2 passing depth ) and the overpass bridge (9) set on the transverse road and its four straight bridge lane-changing approach bridges (1, 2, 3, 4) and two left-turn bridges (5, 6). It avoids two consecutive turns of vehicles in the case of fast speed and narrow bridge deck, which improves the safety and passing speed of vehicles. There is no ramp that extends outwards and does not occupy land. In the case of relatively crowded urban space, it does not align with the surroundings of the road. For building demolition, underpass non-motor vehicle walkways 10, 11, 12, 13 are set up under the intersection to completely solve the separation of motor vehicles and non-motor vehicles. Due to the simple single-layer structure, all bridge underpass tunnels can be replaced. Become a fantastic overpass without a bridge. Applicable to specific surrounding environment.

The invention relates to a steering system of a rice transplanter. The steering system comprises a hydraulic system and a steering control system, wherein the hydraulic system comprises a power element, executing elements, and a control element; the power source is an engine; the power element of the hydraulic system is a hydraulic pump; the executing elements are four single-acting hydraulic cylinders which are separately mounted on the inner side of each of four wheels, and can separately control the rotating angle of the four wheels; the control element comprises three-position four-way electromagnetic proportion reversing valves, and the three-position four-way electromagnetic proportion reversing valves control the size of an electric current of a ratio electromagnet of each of the three-position four-way electromagnetic proportion reversing valves so as to adjust the opening degree of the corresponding reversing valve in a stepless manner; the steering control system mainly comprises a central controller and angle sensors, wherein the angle of a corresponding wheel and the flow direction of oil fluid of the hydraulic system are adjusted by the central controller according to a selected steering mode, and relationships between every two steering angles of the each of the wheels are calculated according to the different steering modes; and the angle sensors are separately mounted on the inner side of the corresponding wheel, and during steering, the steering angles of the wheels are measured by the corresponding angle sensor, and are fed back to the central controller to eliminate deviation of the steering angles continuously.

The invention discloses a dust cart with a mop synchronous rotation function, and belongs to the field of cleaning devices. The dust cart comprises a cart body, a cleaning mop and a synchronous rotation device, wherein the cart body is provided with a steering wheel, a first steering shaft and a second steering shaft, and the first steering shaft and the second steering shaft are connected with the steering wheel; the cleaning mop is rotationally arranged on the cart body through a support rod; the synchronous rotation device comprises a steering gear, a synchronous gear, a steering gear rack,a steering connecting rod and synchronous gear racks in a coaxial way, the steering gear is arranged on the second steering shaft, the synchronous gear is synchronously arranged on the second steering shaft, the steering gear rack is glidingly arranged on the cart body, the steering connecting rod is positioned at both sides of the steering gear, and the synchronous gear racks are positioned at both sides of the steering gear; one end of the steering connecting rod is hinged to the steering gear rack, and the other end of the steering connecting rod is fixedly connected with a front wheel ofthe cart body; the synchronous gear racks are glidingly arranged on the cart body, and one end of each synchronous gear rack is hinged to the cleaning mop. The dust cart has the advantages that the function of synchronous steering of the mop and the front wheel is realized, and the direction of the mop can be changed at smaller steering radius.

The invention discloses a highway double-guide-beam bridge erecting machine and a turning method. The bridge erecting machine comprises longitudinal guide beams, a front support leg, a rear support leg and a rear propping device, wherein the longitudinal guide beams comprise two rows of parallel space trusses with the same structure and size, a front frame is installed between the front end partsof the two rows of space trusses, an upper rear cross beam is installed between the rear end parts, and the front frame and the upper rear cross beam are used for integrating the two rows of space trusses into a whole. The turning method comprises the following steps of: (1) preprocessing the upper rear cross beam; (2) removing part of rods of the front frame; (3) installing the preprocessed upper rear cross beam; (4) removing and hoisting the front support leg; (5) installing a removed lower front cross beam; (6) interchanging the front support leg and the rear support leg; and (7) subsequently processing. The bridge erecting machine has the advantages of reasonable design, simple turning method, fewer removing and installing components, convenient front end and rear end interchange and low investment cost; and the defects of long consumed time, high economical investment, great potential safety hazards, heavy labor intensity, construction period delay and the like of the traditionalbridge erecting machine and the turning method are overcome.

The invention relates to a crossroad traffic light-free overpass, each road is arranged as follows, from west to east direction: viaduct motor vehicles lanes, non motor vehicles lanes and pedestrian straight lanes, pavement motor vehicles left turn lanes, pavement motor vehicles right turn lanes and U-turn lanes are respectively arranged, pavement annular-islands are provided at one side of the westing direction; from east to west direction: viaduct motor vehicles lanes, non motor vehicles lanes and pedestrian straight lanes are provided; underground motor vehicles left turn lanes, underground motor vehicles right turn lanes and U-turn lanes are provided; the underground annular-islands are provided at one side of the easting direction; from south to north direction: viaduct motor vehicles lanes, non motor vehicles lanes and pedestrian straight lanes are provided, pavement motor vehicles left turn lanes and underground motor vehicles right turn lanes are provided; from north to south: underground motor vehicles lanes, non motor vehicles lanes and pedestrian straight lanes are provided; underground motor vehicles left turn lanes and ground motor vehicles right turn lanes are provided. The crossroad traffic light-free overpass has the advantages of strong practicality, reasonable arrangement, simple structure and small land occupation, by distributing the flow of motor vehicles and non-motor vehicles, the speed of the vehicles can be greatly enhanced.

The invention discloses an automobile using novel axles. The automobile using the novel axles comprises the front axle connected with front wheels of the automobile, the rear axle connected with rear wheels, an engine and a main power output shaft. The engine is connected with an automobile chassis, and the engine is connected with the main power output shaft. The automobile further comprises a driving motor and an auxiliary power output shaft. The driving motor is connected with the front axle or the rear axle, and the main power of the engine is transmitted to a front axle differential which is connected with a front axle semi-shaft through the main power output shaft or to a rear axle differential which is connected with a rear axle semi-shaft. The power of the driving motor is transmitted to the front axle differential or the rear axle differential through the auxiliary power output shaft. The front wheels are connected with the front axle semi-shaft, the rear wheels are connected with the rear axle semi-shaft, and the front axle or the rear axle is an automobile active differential drive axle. The automobile using the novel axles can obtain a small turning radius, achieves good driving performance, has the good road surface adaptive capacity, possibility and flexibility, and achieves spinning in situ and turning around in narrow space.

The invention relates to a hydrostatic drive high-speed transplanter chassis. An engine provides a power source for a two-way plunger variable pump and an auxiliary gear pump. The two-way plunger variable pump is connected with a two-stage variable traveling transplant motor through a closed circuit and provides power for a parking brake control valve. An output shaft of the two-stage variable traveling transplant motor is connected with a mechanical transfer case, and the mechanical transfer case transmits power to an inter-axle differential and transplant mechanism speed change and power separation boxes. The transplant mechanism speed change and power separation boxes are connected with a transplant drive mechanism, the power separation box determines whether a transplant mechanism works or not, and the transplant mechanism speed change box adjusts the transplant plant spacing according to different transmission ratios. The output end of the auxiliary gear pump is connected with a flow distribution valve. The flow distribution valve distributes oil liquid to a high-speed electromagnetic reversing valve and a profiling mechanism control valve, the high-speed electromagnetic reversing valve and a steering gear control a steering oil cylinder, the profiling mechanism control valve controls a profiling mechanism oil cylinder, and a transplant mechanism lifting oil cylinder is controlled by a transplant mechanism lifting control valve.