1666 results about "Mechanism (engineering)" patented technology

The invention relates to the research field of asphalt pavement materials and structures in highway engineering, and discloses a torsional shear test device for asphalt pavement materials and structures, which is characterized in that it includes a machine base, a reaction force frame arranged on the machine base, and a The worm gear mechanism at the bottom of the reaction force frame, the worm input end of the worm gear mechanism is connected to the pressure motor, the output end of the worm gear is connected to the lower support plate for clamping the test piece, and the pressure sensor is arranged on the lower support plate; the reaction force frame A torque motor is arranged on the top, and the output shaft of the torque motor is connected downwards to the disc torque sensor and the upper support plate for clamping the specimen in turn.

The invention discloses a pile driver for civil engineering. The pile driver for civil engineering comprises a chassis, a stand column and a crane jib. A rotation shaft of a drive motor is provided with an incomplete gear. The support is provided with a cross shaft rotationally connected with the support. The cross shaft is provided with a transmission gear and a rope reel. The stand column is provided with a first pulley. A second pulley is arranged at the top end of the crane jib. The lower end face of the crane jib is provided with two vertically downward guide sliding grooves. A pile hammer is arranged between the two guide sliding grooves. The two sides of the upper end of the pile hammer are both provided with supporting arms which are inclined and upward. A pile clamping mechanism connected with the stand column is arranged under the pile hammer. One end of a connection rod is fixedly connected with the bottom end of the stand column. The lower end of the stand column is connected with the chassis through a sliding mechanism. The chassis is provided with a hydraulic cylinder. The pile driver for civil engineering is simple in structure, good in pile driving upright performance, capable of continuously driving piles, high in pile driving efficiency, easy and convenient to operate and high in practicability.

The invention relates the low-alloy high-tensile structural steel and preparing method. The components are as follows: C:0.05%-0.60%, Si: 0.05%-0.70%, Mn: 0.5%-2.5%, P: <= 0.04%, S: <=0.04%, Cr: 0-0.70%, Ni: 0-0.70%, molybdenum: 0-0.60%, Cu: 0-0.20%, vanadium: 0.01%-0.30%, Al 0-0.1%, niobium: 0.001%-0.10%, N: 0.004%-0.02%, and the left is Fe. The method comprises the following steps: using revolving furnace to smelt, and using LF furnace to refine. The yield strength as is above 460Mpa, the dynamic ductility Akv is above 27J at low temperature (-40Deg.C), endurance life is above 2 million times, and the finished steel can be used for train brake beam, engineering machinery and hydraulic support without heat treatment. After quenching and high tempering modified heat treatment, the strength for extension of the steel is above 750Mpa, the dynamic ductility Akv is above 150J at low temperature (-40Deg.C). After carbonization, the steel can be used for abrasion-proof driving mechanism elements and parts.

The invention discloses an engineering machine and a telescopic arm. The telescopic arm comprises a telescopic cylinder, a multi-section arm, a hydraulic system, at least one mechanical limit mechanism, a controller and a position sensor, wherein the movable end of the telescopic cylinder is telescopic in the extending direction of the telescopic arm; the hydraulic system is connected with the telescopic cylinder through a hydraulic oil circuit; the mechanical limit mechanism is matched with the movable end of the telescopic cylinder; the position sensor corresponds to the mechanical limit mechanism and is used for detecting the position of the movable end of the telescopic cylinder; and the controller outputs a control signal to a proportional control valve according to a predetermined strategy, so that the speed of the movable end of the telescopic cylinder is reduced. Through the technical scheme, the telescopic speed of the telescopic cylinder can be reduced according to the control signal, and the speed of the movable end is reduced to a low value or the movable end just stops at a position corresponding to the mechanical limit mechanism when the movable end arrives at the corresponding mechanical limit mechanism, so that collision impact between the movable end and the mechanical limit mechanism can be reduced or avoided.

The invention belongs to the technical field of construction engineering construction, and particularly relates to a combined type telescopic sleeve jacking device and method. The device solves a series of problems that in high-rise and super high-rise building concrete cylinder construction, a traditional climbing formwork system is complex in a power system, large in transmission mechanism number, poor in narrow cylinder space adaptability, low in combined construction flexibility and the like. The combined type telescopic sleeve jacking device comprises a plurality of jacking unit modules,a horizontal jacking frame, an upper supporting frame, a lower supporting side frame and a plurality of longitudinal connecting beams, wherein each unit jacking module comprises a jacking oil cylinderand a telescopic sleeve frame; the jacking oil cylinders are arranged at the center positions of the telescopic sleeve frames, and the upper ends of the jacking oil cylinders are connected with the horizontal jacking frame; and the jacking oil cylinders penetrate through gaps between the longitudinal connecting beams of the upper supporting frame, and the lower ends of the jacking oil cylinders are connected with the lower supporting frame. By providing a single-oil-cylinder jacking module device with a telescopic sleeve frame, formwork system jacking operation can be independently carried out, multi-module combined jacking can be carried out according to large-space cylinder construction needs, and large-load three-dimensional operation is achieved.

The invention discloses an air-pressure-adjustable type oil gas suspension system, which comprises an oil gas suspension mechanism which is provided with inflatable energy accumulators (16 and 17) for reducing vibration, and also comprises an air pressure adjusting unit, wherein the air pressure adjusting unit comprises an air chamber serving as an air source, and the volume of the air chamber can be adjusted; inflation openings of the inflatable energy accumulators (16 and 17) for reducing the vibration are respectively connected onto the air chamber through respective branch air channels (8); and a branch air channel on-off valve (18) is arranged on each branch air channel (8). Besides, the invention also discloses an air pressure adjusting method for the air-pressure-adjustable type oil gas suspension system and an engineering vehicle. The air-pressure-adjustable type oil gas suspension system has the advantages that through additionally arranging the air pressure adjusting unit in the oil gas suspension mechanism, when the air pressure drops due to leakage and the like of the inflatable energy accumulators for reducing the vibration of the oil gas suspension mechanism, the energy accumulators can be conveniently inflated through the air pressure adjusting unit to increase the air pressure, so the working performance of the oil gas suspension mechanism is relatively effectively improved.

The invention discloses a method for analyzing swing high-speed jet characteristics of an underwater engine nozzle, and belongs to the field of fluid mechanical engineering. The implementation methodcomprises the following steps of: through establishing a geometric model of an underwater solid rocket engine nozzle, establishing a fluid calculation domain, carrying out geometric optimization on aninterface of the two fluid calculation domains, setting an interface between the calculation domains for data transmission to achieve simulation of the swing working condition of the nozzle, carryingout grid division on the fluid domains in a partitioned mode, carrying out grid independence verification, and obtaining the optimal grid number; importing the obtained final grid file into a FLUENTsolver, setting boundary conditions, an adopted calculation model and a calculation method, and carrying out solving; carrying out numerical simulation analysis and post-processing on a numerical calculation result. The rocket engine nozzle swing high-speed jet flow characteristic is accurately simulated and analyzed, the nozzle swing high-speed jet flow rule and mechanism can be easily disclosed,a theoretical basis is provided for the engine nozzle structure design of underwater powered missile launching, and the actual engineering application problem of underwater powered missile launchingis solved.

The invention discloses a cutting slit separation device of cocoon, comprising a holding mechanism and a rotary arm cutting mechanism which are arranged on a bottom plate, wherein the holding mechanism comprises a main shaft which is driven by a main shaft rotary driving motor. The main shaft is provided with a holding device, and the holding device is an arched finger which is connected through a steel spring sheet and located at the upper part and a V-shaped finger which is connected through the holding rotary arm and located on the lower part. The steel spring sheet and the holding rotary arm are respectively connected with an arched electromagnetic clutch and a V-shaped electromagnetic clutch. The rear end of the V-shaped groove of the V-shaped finger is provided with a vertical blocking plate. The invention adopts the holding mechanism designed by the profiling human engineering to hold the cocoon with different sizes and specifications; because the elastic steel sheet and the rotary arm of the holding mechanism are connected with the main shaft through the electromagnetic clutches, so the holding actions can be respectively realized and are flexible; because a cocoon length detecting device is installed in the system, the positions of the cutting cutter can be adjusted according to the different length of the cocoon, the adapting capability on different heights of the cocoon can be realized, and silkworm pupas cannot be damaged.

The invention provides a translation and rotation driving method for an electric power overhaul lifting platform. The translation and rotation driving method for the electric power overhaul lifting platform comprises the following steps of firstly, parking an engineering vehicle below a fault electric power facility, starting a lifting motor in a connecting rod lifting mechanism, driving two driving blocks to move close to each other along a sliding groove by a bidirectional screw rod, a first connecting rod A and a first connecting rod B are close to each other and rotate and rise, a second connecting rod A and a second connecting rod B are close to each other and rotate and rise, a plurality of connecting rod assemblies rise synchronously, and the lifting platform moves upwards to rise;then, a sliding component I and a sliding component II matches with each other to jointly drive the lifting platform to translate in any direction in the horizontal plane; and finally, a stepping motor is started, a rotating plate drives a sliding driving mechanism and the connecting rod lifting mechanism to synchronously rotate in the axial direction of the rotating plate, the lifting platform rotates around the electric power and stops rotating to the proper position, and all-dimensional repair and maintenance of the electric power are facilitated for operators on the lifting platform.

The invention relates to a tunnel engineering machine, in particular to a movable automatic horizontal positioning detection arm for a tunnel. The movable automatic horizontal positioning detection arm consists of a detection instrument, a protection bracket, a damping arm, a rigid retractable arm, an enclosure, a transverse rotating driving mechanism, a height increase control bracket, a horizontal target positioning control bracket and a power drive source. The movable automatic horizontal positioning detection arm is characterized in that the protection bracket consists of four groups of triangular wheels, a protection shell and a connecting bracket, and the damping arm guarantees that the triangular wheels are attached onto a tunnel lining surface to enable the transverse surface and the longitudinal surface of a radar antenna and the tunnel lining surface are always on the same level. The movable automatic horizontal positioning detection arm for the tunnel has the advantages that the detection arm can be installed on an automobile or other walking mechanisms to adapt to different road surfaces, more importantly, the detection arm can detect the tunnel lining surface on the road surface under construction, the stability of detection quality is guaranteed, the detection quality is improved, the labor intensity of people is relieved and the efficiency is improved.

The invention discloses a synchronous control device of revolving speed of a hydraulic walking mechanism engine and discharge of a main pump, belonging to the filed of mine and engineering machinery. The synchronous control device comprises a proportional pressure reducing valve, a main pump servo valve and an accelerator control cylinder, wherein a valve block is arranged between the proportional pressure reducing valve and the main pump servo valve; a shuttle valve and two throttle plugs are embedded into the pressure reducing valve. Two ends of the shuttle valve are respectively connected between an output port A and an output port B of the proportional pressure reducing valve. The proportional pressure reducing valve controls the servo valve of a variable pump through a throttle plug hole; an output pressure signal of the proportional pressure reducing valve at the left side or the right side is output to the accelerator control cylinder through the output port of the shuttle valve to control the stroke of an oil cylinder so as to control an accelerator of the engine. The synchronous control device disclosed by the invention has the advantages that a motor car can be operated to move forwards or backwards or to change speed by operating a discharge handle of the pump only; the revolving speed of the engine is automatically adjusted to match with the power requirement of the pump while the variable of the pump is controlled, and therefore the problem that the engine is suffocated and switched off due to mismatching between the discharge of the pump and the accelerator of the engine during starting the motor car can be prevented.

The invention relates to the technical field of vehicle engineering, and provides a Mecanum electric wheel and an omnibearing mobile platform. The Mecanum electric wheel comprises a rotating mechanism and multiple Mecanum components. The rotating mechanism comprises a stator part and a rotor part which can coaxially rotate relative to the stator part. All the Mecanum components are equidistantly and circumferentially arranged outside the side wall of the rotor part in a surrounding way with the rotating shaft of the stator part acting as the center. All the Mecanum components are fixedly connected on the rotor part. According to the Mecanum electric wheel, the whole structure is simple and the conventional wheel hub structure is replaced by the rotating mechanism so that the number of parts of the whole electric wheel can be reduced, and the matching precision required for the stator part and the rotor part is low and thus the Mecanum electric wheel is more suitable for production and processing.

The invention discloses a wet spraying machine with a sliding foldable arm. The wet spraying machine comprises a frame, a driving cab is arranged on the frame in a left offset manner, a power system is arranged below the frame, an electric control system, an external additive system, a hydraulic system, an air pressure system and a pumping system which is connected with the frame are arranged above the frame, an engineering mechanical chassis is arranged on the frame on the right side of the driving cab, a sliding foldable arm support is arranged on the engineering mechanical chassis, the lower portion of the sliding foldable arm support is connected with a sliding base through bolts, a travelling mechanism is arranged below the sliding base and on a guide rail, and the guide rail is fixed on the frame. By the aid of the wet spraying machine with the sliding foldable arm, one slide, two rotations, four folding and one extension are realized, multidirectional control is realized, dead working angles are eliminated, construction quantity is improved, spraying area is enlarged, labor intensity of workers is reduced since the workers control the spraying device by controlling an operation panel, dust concentration is lowered, and risks to health of construction workers are reduced.

The invention relates to the technical field of mechanical engineering transmission, and in particular relates to a speed regulation asynchronous magnetic coupler with an adjustable radial air gap. In the speed regulation asynchronous magnetic coupler, the radial movement of active card bodies which are uniformly distributed on a disc body is utilized to realize radial shift-in or shift-out of a permanent magnet, accurately adjust the gas gap length between the permanent magnet and a conducting bar, change the acting force of an air-gap field and realize the outputs of different rotation speeds and torques, thereby realizing purpose of stepless speed change. The speed regulation asynchronous magnetic coupler provided by the invention is mainly used between a motor and a load in industries such as oil refining, chemical industry, coal and electricity generation, or used in power transmission devices of other related mechanisms.

The invention discloses an active-disturbance-rejection control method of a multi-axis series mechanical arm, and belongs to the technical field of series mechanical arm control. The control method comprises the following steps of S1, establishing a dynamic mathematical model of a motor position; S2, designing an active disturbance rejection controller; and S3, estimating and compensating the total disturbance of the system. The method has the advantages that the response speed is higher, the anti-interference capability is higher, and the tracking without overshoot is realized; a novel nonlinear function is adopted, better smoothness, continuity and conductibility are achieved near an original point, and meanwhile the better high-frequency flutter suppression capacity and the better active disturbance rejection capacity are achieved compared with a traditional ADRC; a Kalman filter is introduced into an extended state observer, so that the total disturbance of the system can be effectively estimated, including external disturbance, the coupling effect between shafts and the friction force between components; and simulation and test results show that the control method has good static performance, dynamic quality and anti-jamming capability, can provide reference for research of a connecting rod mechanism, and has very high engineering practical value.

The invention aims to provide a cable laying device for electric power engineering construction and a use method thereof. The cable laying device comprises a cable rack and a tractor; the tractor comprises a driving wheel and a driven wheel, a belt is wound between the driving wheel and the driven wheel, a gear is fixed in the axis direction of the driving wheel, an adjusting base is fixed at thebottom of the gear, a mounting base is arranged below the adjusting base, at least four retractable rods are hinged between the adjusting base and the mounting base, an adjusting rod is hinged to oneretractable rod, a horizontally-arranged screw rod is rotationally connected into the mounting base, the end, away from the retracting rods, of the adjusting rod is in threaded connection with the screw rod, a driving mechanism for automatically driving the screw rod to rotate is fixedly mounted at the end part of the screw rod, and the driving wheel is slidably connected to the mounting base. According to the cable laying device for electric power engineering construction and the use method thereof, the problem that when cables are laid in a pipeline, due to improper traction control, the belt is prone to looseness is solved. The device has the effects of automatically adjusting the belt when the belt is loosened, reducing the conditions of belt deviation and failure and improving the construction efficiency.

The invention discloses a device, a method, a system and an engineering machine for controlling rotary vibration of a cantilever crane. The device comprises a receiving device and a controlling device, wherein the receiving device is used for receiving the displacement of the cantilever crane in the rotating direction, and the controlling device is used for calculating the displacement difference between the displacement and a reference displacement after rotating motion of the cantilever crane is finished and generating control signals for a vibration attenuation executing mechanism through a proportional differential algorithm according to the displacement difference. By means of the technical scheme, the control signals can be determined by detecting the displacement in the rotating direction according to the displacement difference, and then the control signals are exerted onto the vibration attenuation executing mechanism to restrain rotary vibration of the cantilever crane. The device, the method, the system and the engineering machine for controlling the rotary vibration of the cantilever crane has significant meanings in improving manipulating efficiency and safety of a pump truck.

The invention provides a distribution valve of a pumping system, which comprises a valve body. A valve cavity is positioned on the valve body, the valve body is provided with a valve a, a valve b and a valve c which are communicated with the valve cavity, a valve plug is positioned in the valve cavity, and under the action of a driving mechanism, the valve plug can seal the valve a and the valve b in alternative mode. The invention further provides a pumping system comprising the two distribution valves. By means of two valve plugs, the purpose that two delivery cylinders alternatively suck materials and pumping is achieved. The pumping system is simple in structure, reliable in distribution performance and capable of saving cost and installation space. Two sets of driving mechanisms are utilized to respectively drive the two valve plugs, thereby greatly simplifying a control system and lightening the weight of the whole machine. The invention further provides engineering machinery including the pumping system.

The invention relates to a dual-cavity semi-ring surface type power distribution continuously variable transmission which comprises a dual-cavity semi-ring surface type continuously variable unit driven by traction, an ordinary gear train, a two-degree-of-freedom differential gear train and a reversing mechanism, wherein input power is transmitted by two paths, one path of input power is transmitted to a center shaft of the differential gear train from a main shaft, the other path of input power is transmitted to a second gear of the differential gear train through the dual-cavity semi-ring surface type continuously variable unit and the ordinary gear train, and the two parts of power are output through a planet carrier after being converged at the differential gear train. The invention ensures that one part of input torque is born by a second main shaft to reduce the torque born by the dual-cavity semi-ring surface type continuously variable unit, thereby having a capacity of transmitting a large torque. In the design, odd gears in the ordinary gear train are externally meshed, thus, power distribution is realized inside a closed system, and large torque output of the differential gear train is ensured. In order to meet the requirement for advancing and recessing during the operation of engineering machinery, the reversing mechanism is arranged in the dual-cavity semi-ring surface type power distribution continuously variable transmission during the output.

The invention relates to the technical field of engineering machine measuring and control, in particular to a rotation angle measuring method, device and system and an engineering machine to improve the measuring accuracy of a rotation angle. The rotation angle measuring system comprises a rotation speed sensor used for detecting the rotation speed of a hydraulic pump, at least one proximity switch and a controller, wherein each proximity switch sends out a sensing pulse when inducing teeth of an induction gear of a rotation mechanism, and the controller is in signal connection with the hydraulic pump, the rotation speed sensor and each proximity switch and used for determining the current induction pulse count according to the rotation direction of the rotation mechanism. A rough measurement value of the rotation angle is obtained according to the current induction pulse count. The rotation speed of the induction gear is obtained according to the rotation speed of the hydraulic pump and the control currents of the hydraulic pump, the variation of the rotation angle is obtained according to the rotation speed of the induction gear and the time difference between sampling time and current induction pulse generation time, and the accurate measurement value of the rotation angle is obtained according to the rough measurement value of the rotation angle and the variation of the rotation angle.

The invention relates to the technical field of mechanical engineering, in particular to a steel pipe bending device. The steel pipe bending device comprises a hollow bending base, and the bending base is provided with a fixing platform, a steel pipe clamping groove and a steel pipe bending mechanism; the steel pipe bending mechanism comprises a center wheel and a rotating wheel, a first pipe bending groove is formed in the side portion of the center wheel in an annular mode, and a second pipe bending groove is also formed in the side portion of the rotating wheel in an annular mode; the center wheel is connected with a motor through a shaft, and the motor is arranged inside the bending base; a fixed block is arranged at the end of the steel pipe clamping groove, and a spring is fixed to the other end of the fixed block; the steel pipe clamping groove is provided with a restoration block which is movably connected with the spring, and the restoration block is connected with the steel pipe clamping groove through a clamping part; one side of the bending base is provided with a steel pipe connecting part and a bending forming groove, the steel pipe connecting part comprises a connecting base and a bent pipe mechanical arm, and the bending forming groove is formed between the bending base and the connecting base. According to the technical scheme, a bent pipe is taken out conveniently and the working efficiency is improved by means of the steel pipe bending device.

The invention discloses an inner wall cleaning device of a steel pipe for construction engineering, and relates to the technical field of construction machinery. The device comprises a fixing frame and a limiting frame. A straight rack slidably mounted on the limiting frame is mounted on the clamping mechanism in a transmission manner. A translation mechanism used for driving the straight rack totransversely reciprocate is arranged on the fixing frame. A driving shaft is rotatably mounted in a steel pipe. The driving shaft is connected with a transmission mechanism in a driving manner. The transmission mechanism is provided with a steel wire brush plate used for cleaning an inner wall of the steel pipe. According to the inner wall cleaning device of the steel pipe for construction engineering, a driving motor is arranged for driving, the arranged transmission mechanism realizes the rotation of the steel wire brush plate and achieves a rotation cleaning effect for the inner wall of thesteel pipe, the arranged steel wire brush plate can adjust the position of the driving shaft and achieve a full cleaning effect for the inner walls of steel pipes with different inner diameters, andthe arranged translation mechanism can drive the steel pipe to transversely reciprocate relative to the steel wire brush plate, thereby achieving the full cleaning effect for the inner walls at different axial positions of the steel pipe.

The invention relates to a rigidity and damping multistage adjustable oil-pneumatic suspension and a control method, and belongs to the field of combination of hydraulic and pneumatic engineering, mechanical engineering and vehicle engineering. The rigidity and damping multistage adjustable oil-pneumatic suspension comprises a hydraulic cylinder, a damping valve, a switch electromagnetic valve andan energy accumulator, the energy accumulator adopts a diaphragm type energy accumulator, an oil cavity of the energy accumulator and a nitrogen chamber are separated by an energy accumulator diaphragm, and the energy accumulator comprises a first energy accumulator A and a second energy accumulator B which are respectively connected with switch valves 9 and 10 in series; a damping adjusting mechanism comprises two switch electromagnetic valves 7 and 8, three throttle valves 4, 5 and 6 and a one-way valve 3, the throttle valves 5 and 6 are respectively connected with the switch electromagnetic valves 7 and 8 in series, and the throttle valves 4, 5 and 6 are connected with one another in parallel. According to the rigidity and damping multistage adjustable oil-pneumatic suspension system,the rigidity and damping can be adjusted according to loads and road conditions, the adaptability of a vehicle to different roads is improved, the driving performance of the vehicle is improved, and the rigidity and damping multistage adjustable oil-pneumatic suspension has the advantages of being convenient to disassemble and assemble, reliable in work, capable of effectively improving the driving comfort and safety of the vehicle and the like.

The invention relates to an axial-flow compressor stator blade system with adjustable first and second half segments and a working method thereof and belongs to the field of mechanical technology of impellers. A single-stage stator blade is divided into a first half segment adjustable blade (1) and a second half segment adjustable blade (4). Sleeve ring structures (3) of the first and second half segment adjustable blades are connected via a connection cylinder (2). The connection cylinder (2) is arranged at the biggest thickness part of the last-stage stator blade and installed between an external casing and a stator inner ring. A stepping motor rotates so as to drive a worm, a worm wheel, a rotation ring, a cylindrical pulling block, and the first half or second half segment blade to rotate and move successively, thereby achieving adjustment of angles. Compared with the prior art, the stator blade system is advantageous in that 1) for a middle-stage stator blade, by rotating the first half segment blade, the blade is arranged at a favorable attack angle, and by rotating the second half segment blade, a rotator at the backward position of the stator is arranged at a favorable attack angle; and 2) an adjusting mechanism is simple and easy to realize in engineering.

A damage-proof drive component device applies to the field of mining machinery or engineering machinery. The device comprises a mining mechanism (1), a drive mechanism (2), a damage-proof mining drive component mechanism (3), a guide mechanism (6), and so on. The damage-proof mining drive component mechanism (3) comprises an anti-inclination structure (4) and / or a buffer anti-inclination structure (66). The mining mechanism (1) comprises a percussion head (5). The drive mechanism (2) comprises a power percussion member (9). The damage-proof mining drive component mechanism (3) is disposed at one end or both ends of the power percussion member (9), or on the power percussion member (9), or on the percussion head (5). The power percussion member (9) drives the percussion head (5) to perform percussion, and a percussion reaction inclination force is applied on the anti-inclination structure (4) and / or the buffer anti-inclination structure (66). The anti-inclination structure (4) and / or the buffer anti-inclination structure (66) prevent the drive mechanism (2) from suffering inclination and / or percussion damage. Also provided is a damage-proof drive component device method.

The invention discloses a concrete crushing device for constructional engineering. The device comprises a box body; supporting mechanisms are arranged on the two sides of the bottom of the interior ofthe box body in a supporting mode, and the supporting mechanisms comprise connecting frames, sliding rods and electric telescopic rods; crushing mechanisms are arranged at the interior of the box body, and the crushing mechanism comprise crushing wheels, fixing rods, connecting rods and third gears; guiding mechanisms are arranged on the inner walls of the two sides of the box body, and the guiding mechanisms comprise guiding frames; and gear sets are arranged on the two sides of the exterior of the box body, and the gear sets comprise first gears and second gears, and a motor is arranged onone sides of the gear sets. According to the device, when the electric telescopic rods jack up the connecting frames, the connecting frames can slide on the sliding rods, and the connecting frame scandrive the fixing rods to ascend along the guiding frames, so that the crushing wheels in the crushing mechanisms can carry the third gears to change the distance between the two crushing mechanisms,and the third gears are engaged with the gear sets all the time; and the distance between the crushing mechanisms can be changed through ascending and descending of the supporting mechanisms.

The invention discloses a straight thread rolling mechanical integrated machine, which comprises a rolling head, a steel bar clamping mechanism, a speed reducing motor, a feeding system, an electric control system and a cooling system, wherein the rolling head is axially linked with the speed reducing motor; the feeding system is arranged below the rolling head and the speed reducing motor and in fit transmission with the rolling head and the speed reducing motor; and the electric control system is arranged below the feeding system. The integrated machine has simple configuration, good using effect, strong maneuverability and high cost performance, and is suitable for large-area popularization and use in the engineering field.

The invention belongs to the technical field of geotechnical engineering and particularly relates to an SDOF vibrating table testing device. The SDOF vibrating table testing device is composed of a base, exciter front and rear fixing supports, transverse and longitudinal suspension beams, suspension fixing rods, an exciter, a vibrating table rail support, rails, a vibrating table top, fixing holes, vibrating table bottom wheels, an exciter servo system, an oil pressure conveying control system and a computer adjusting control system, wherein the exciter is composed of a fixing support, an oil cylinder, a transmission rod and a connecting bayonet device. The front fixing support, the rear fixing support, the transverse suspension support and the longitudinal suspension support are fixed onto the base to form a frame for fixing the oil cylinder of the exciter; the vibrating table top is mounted on an instrument support through the rails; the exciter is in rigid connection with the vibrating table top and is controlled by a servo system, an oil pressure system and a computer system to work. By being combined with different vibrating table model testing devices, the SDOF vibrating table testing device can achieve simulation of seismic vibration under excitation in set waveforms, thereby achieving vibrating mechanism testing study of geotechnical engineering scientific problems under SDOF vibration.

The embodiment of the invention provides a bogie and a rail engineering vehicle. The bogie comprises two wheel sets, a framework and two power devices, wherein the two wheel sets are oppositely arranged, and each wheel set comprises an axle and two wheels fixed to the two sides of the axle; each wheel set is provided with two axle boxes, and the two axle boxes are arranged on the axle and locatedbetween the two wheels; the framework comprises two side beams arranged oppositely and a cross beam connected with the two side beams, and the side beams are perpendicular to the axle and connected tothe axle boxes; the two power devices are respectively used for driving the two wheel sets to move, and are symmetrically arranged relative to the center of the bogie; the power device comprises a traction motor, a transmission mechanism and a gear box, the traction motor is arranged on the framework and connected with aninput end of the gear box through the transmission mechanism, and an outputend of the gear box is connected with the axle. The embodiment of the invention is beneficial to reducing the size of the bogie, so that the bogie is enabled to be suitable for running on a rail witha smaller limit.

The invention relates to the technical field of mounting and dismounting of large-torque threads, in particular to a hydraulic automatic nut screwing-unscrewing device for solving the nut screwing and unscrewing problem in engineering equipment. The device consists of two parts of a hydraulic pump station and an execution mechanism, wherein the hydraulic pump station is driven through a motor; the execution mechanism mainly comprises a two-way plunger motor, a hydraulic cylinder and a three-jaw chuck; a nut is locked through the cooperation between the extension of the hydraulic cylinder and the three-jaw chuck; the screwing-unscrewing of the nut is realized through the rotating torque of the hydraulic motor; and the energy conversion mode of the device is electric energy-mechanical energy-hydraulic pressure energy-mechanical energy.