32results about How to "Small turning diameter" patented technology

A skateboard includes a board body having a bottom provided with a base having a bottom provided with two opposite wheel seats. Each of the two wheel seats includes a wheel axle for mounting a roller. The wheel axle of each of the two wheel seats has a center located at a height different from that of a center of the respective wheel seat, thereby forming an eccentric state, so that each roller has independent horizontal and vertical displacement, thereby forming a balance effect, so that the skateboard can be moved in a stable manner.

The invention relates to the technical field of pipe clamps, in particular to a claw-free chuck for clamping pipes. A through hole accepting penetration of the pipes is formed in the middle of a main plate, and the main plate is provided with a claw-free clamp capable of clamping the pipes and enabling the pipes to slide in the through hole in the axial direction of the center of the main plate. According to the claw-free chuck for clamping the pipes, claws and clamping bases pushing the claws are eliminated, and therefore the thickness of the claw-free chuck for clamping the pipes is reduced, the self weight of the chuck is lowered, and feeding waste of the pipes is reduced; because the claws are eliminated, the problem that claw handles extend out of the maximum diameter part of the chuck (namely the main plate) is avoided, the installation space of the chuck is greatly reduced, the manufacturing cost of the chuck is greatly reduced, and the stability is high; pipe loads are retained by screw rods firstly, worm motors just need to bear small retaining force, and gearboxes of the worm motors are protected against damage caused by overload due to the two-stage retaining function. In addition, the claw-free chuck is simple in structure, small in size and light in self weight and has full stroke.

The embodiment of the invention provides a crane and relates to the technical field of engineering equipment. The crane provided by the embodiment of the invention comprises a towing tractor and an operation vehicle. The towing tractor comprises a first driving part for providing a traveling driving force, a suspended loading mechanism is arranged on the operation vehicle, and the back end of thetowing tractor is hinged to the front end of the operation vehicle, so that when the crane steers in the travelling process, the towing tractor can rotate relative to the operation vehicle. The steering system of the crane provided by the embodiment of the invention is simple and stable and can achieve a relatively small turning diameter.

The invention discloses a vehicle steering system and a vehicle. The vehicle steering system comprises a rear wheel hydraulic steering system and a control system, and the control system controls the rear wheel hydraulic steering system to realize self-adaptive rotation of the rear wheel steering angle and the steering direction according to the front wheel steering angle and the steering direction; the rear wheel hydraulic steering system comprises a hydraulic power source and a hydraulic control module, and further comprises a centering cylinder and a steering power cylinder; the control system controls the hydraulic control module and the hydraulic power source to work according to the vehicle state information, high-pressure oil is provided for the steering power cylinder and the centering cylinder, ordered actions of the steering power cylinder and the centering cylinder are achieved, and a vehicle working mode corresponding to the vehicle state information is completed. According to the system, rear wheels are controlled to steer through electric control hydraulic pressure, and the rear wheels correspondingly rotate by a certain angle at a low speed according to the steering angle of front wheels, so that the turning diameter is reduced, and the vehicle trafficability is improved. Operation is easy, and operation is safe and reliable.

The invention provides a hydraulic supporting control mechanism of a roller connecting shaft and a relevant puncher and a relevant pipe milling machine. The hydraulic supporting control mechanism of the roller connecting shaft is used for supporting the roller connecting shaft dynamically and comprises a connecting shaft supporting base, a hydraulic supporting control system and a hydraulic cylinder installing base. The connecting shaft supporting base contacts with and supports the roller connecting shaft, the hydraulic cylinder installing base is installed on a foundation, a hydraulic cylinder of the hydraulic supporting control system is installed in the hydraulic cylinder installing base, and the hydraulic cylinder can drive the connecting shaft supporting base to move up and down or support the roller connecting shaft in a floating mode. Due to the fact that constant supporting force exists, a sinking range of the roller connecting shaft is limited, rotary diameter of the roller connecting shaft is reduced, simultaneously the stress of handles at two ends of the roller connecting shaft is improved, and the service life of the handles is prolonged.

The invention relates to the field of walking device auxiliary mechanisms, in particular to an angle adjustment automatic reset mechanism. The angle adjustment automatic reset mechanism comprises an adjusting vehicle plate, a rotating shaft, a first torsional spring, a second torsional spring and a damper, wherein an anti-overturning block and a limiting block are arranged at the rear end of the adjusting vehicle plate; a support is arranged at the front end of the adjusting vehicle plate; a sleeve and a pin shaft are arranged in the support; the lower portion of the rotating shaft stretches into the support and is rotationally installed in the sleeve; the pin shaft is sleeved with the first torsional spring and the second torsional spring; one end of the first torsional spring is connected with the lower portion of the rotating shaft, and the other end of the first torsional spring is connected with the support; one end of the second torsional spring is connected with the sleeve, and the other end of the second torsional spring is connected with the support; and the damper is arranged at the lower end of the rotating shaft. The angle adjustment automatic reset mechanism is installed at the tail end of a walking device, when the walking device rotates in a narrow space, the rotation diameter of the walking device can be effectively reduced, and it is guaranteed that the device cannot turn over.

The invention relates to a novel load-bearing wheeled slide plate for a camera car. The novel load-bearing wheeled slide plate comprises a top plate, a pair of slide plate bodies and wheel sets on thebottom surfaces of the slide plate bodies and is characterized in that the slide plate bodies fastened to each other in a staggered manner and hinged to each other are arranged on the bottom surfaceof the top plate, one wheel set is hinged to the bottom surface of each slide plate body, the top surface of the top plate is downwardly provided with a stepped long slot along the width direction, the four corners of the top surface of the top plate are provided with screw holes, the slide plate bodies include a first slide plate body and a second slide plate body, the connecting end of the firstslide plate body extends out of a first connecting plate, the connecting end of a second slide plate body extends out of a second connecting plate, coaxial bearings are embedded into the central holes of the first connecting plate and the second connecting plate, the top surface of the first connecting plate and the bottom surface of the second connecting plate are abutted against and coordinatedwith each other, a half-threaded bolt downwardly penetrate the stepped long slot of the top plate, the polished part of the half-threaded bolt are in close fit with the bearing inner rings of the twoslide plate bodies, and the tail-end threaded part of the half-threaded bolt extends out and is connected with a nut in a threaded manner. By the novel load-bearing wheeled slide plate, the technicalproblems that an existing eight-wheel wheel set has too many dispersed hinges, and the whole wheeled slide plate jitters severely and is unsmooth in turning are solved.