2259results about How to "Improve shock absorption" patented technology

The invention relates to the technical field of wind power generation, and discloses a wind turbine generator set with a vibration reduction function and a construction method thereof.According to the wind turbine generator set with the vibration reduction function, a vibration reduction structure is additionally arranged, and the two elastic ends, arranged in the axial direction, of an elastic buffering piece are connected with the outer wall of a tower drum and the inner wall of a sleeve correspondingly; the elastic buffering piece can effectively absorb and relieve vibration of the sleeve, vibration impact borne by the tower drum is reduced, the overall stability of the wind turbine generator is improved, and safe and stable movement of the wind turbine generator is guaranteed. Compared with a conventional scheme that the diameter or the wall thickness of the tower drum is increased, the damping structure is simple in structure, convenient to install and maintain and low in cost.

The invention relates to the technical field of building shock insulation, and discloses a building shock insulation rubber support which comprises a bottom connecting plate and a top connecting plate, a damping rubber body is arranged between the bottom connecting plate and the top connecting plate, and a first through hole is formed in the middle of the damping rubber body; a plurality of fixing grooves are formed in the damping rubber body in the axial direction, and metal plates are arranged in the fixing grooves. By arranging the bottom connecting plate with the adjusting rod, one part of the adjusting rod is inserted into the damping rubber body, and one end of the adjusting rod is movably connected with the bottom connecting plate, after vibration is finished, if the damping rubber body cannot restore to the original shape, force is applied to one end of the adjusting rod through a hydraulic mechanism in a pushing or pulling mode, and the damping rubber body cannot restore to the original shape. Under pushing of the adjusting rod, resetting of the damping rubber body can be rapidly completed, and operation is convenient and rapid.

The invention discloses an intelligent bridge shock isolation device with a replaceable sensor and an installation method.The device comprises a connecting module, the connecting module comprises a support bottom connecting plate (7) and a sliding module arranged at the top of the support bottom connecting plate (7), and the sliding module comprises an upper friction plate (1), a lower friction plate (4) and an arc-shaped sliding block (3); the data measurement module comprises a sensing force holding layer (5) arranged at the bottom of the lower friction plate (4), the sensing force holding layer (5) is provided with a sensor module (8), and the replacement module comprises a sensor assembly layer (6), an internal wedge block (9) and an external wedge block (10). A sliding friction pair is jointly formed by the connecting module and the sliding module, so that the good damping performance of the support is achieved, meanwhile, the stress state of a bridge is monitored in real time through the data measuring module, intelligent monitoring and jacking installation and rapid replacement of the sensor module are achieved, and the problem that a traditional bridge support cannot be rapidly and safely replaced is solved.

The invention discloses an electromagnetic damping device control method and system for an unmanned aerial vehicle, and relates to the technical field of unmanned aerial vehicle vibration control, and the method comprises the steps: collecting multi-modal data through a sensor, carrying out the preprocessing of the multi-modal data, calculating the external disturbance force according to the preprocessed data, and constructing a BIRF dynamic characteristic model for response prediction; calculating an initial damping coefficient based on a prediction result, optimizing the initial damping coefficient to obtain an optimized compensation signal, and performing real-time early warning according to the obtained optimized compensation signal; the BIRF dynamic characteristic model is used for response prediction, the dynamic modeling precision of the unmanned aerial vehicle in the complex multivariable environment is improved, the damping parameters are adjusted through the optimization algorithm, the real-time control capability of the electromagnetic damping device is enhanced, and the real-time performance of the unmanned aerial vehicle is improved. And vibration characteristic identification and response suppression performance is enhanced through a deep learning and high-frequency signal optimization technology, so that stability improvement and damping performance optimization of the unmanned aerial vehicle in a complex operation environment are realized.

The invention discloses a damping mechanism and a warp knitting machine and process based on the damping mechanism, and relates to the field of damping mechanisms, the damping mechanism comprises a damping hydraulic cylinder and a damping hydraulic rod, the damping hydraulic rod is inserted in the damping hydraulic cylinder, a damping cylinder is fixedly installed on the damping hydraulic cylinder, and a flow limiting hole is formed between the damping cylinder and the damping hydraulic cylinder; an adjusting plate is connected to the damping hydraulic cylinder through a screw cylinder, a damping plate is fixedly installed on the top of the damping hydraulic rod, a damping spring is arranged between the damping plate and the adjusting plate, and the damping hydraulic cylinder and the damping hydraulic rod are sleeved with the damping spring. The base is rapidly leveled, the damping mechanisms and the warp knitting machine body are prevented from inclining, the stress of the damping mechanisms is consistent, the damping effect on the warp knitting machine body is better, the inclination degree of the base is more conveniently known, and the situation that the base is inclined due to misoperation of the leveling unit is prevented; the length of the supporting unit is prevented from being changed under the condition that the leveling unit vibrates, the flatness of the base is guaranteed, and the running stability of the warp knitting machine body is improved.

The invention provides an electric wheelchair damping suspension control method and device, and relates to the technical field of electric wheelchair control, and the technical scheme is characterized in that road surface information collected based on electric wheelchair front wheel mechanical response is obtained, and the road condition about to be encountered by rear wheels is predicted based on the road surface information and the distance between the front wheels and the rear wheels of an electric wheelchair; according to the predicted road condition, the optimal position of a movable heavy object below a seat of the electric wheelchair and the optimal parameters of a rear wheel damper are calculated and controlled, adjustment of the movable heavy object is used for optimizing distribution of the gravity center of the wheelchair, and adjustment of the rear wheel damper is completed before rear wheels make contact with the uneven road surface; the posture of the wheelchair and the comfort degree of a user are monitored in real time, and the position of the movable heavy object and parameters of a rear wheel damper are dynamically adjusted according to the monitoring result. The electric wheelchair damping suspension control method and device have the advantage that the comfort and stability of the electric wheelchair when the electric wheelchair runs on an uneven road surface are improved.

The invention relates to the technical field of vehicles, and discloses a vehicle damping control method and device, electronic equipment and a storage medium, and the method comprises the steps: sending an electromagnetic wave to a target area to receive a reflected wave obtained by reflecting the electromagnetic wave through each point location in the target area; calculating the distance between the vehicle and each point location in the target area according to the sending time of the electromagnetic wave and the receiving time of each reflected wave; determining the pavement type of the target area according to the distance difference between the adjacent point locations; determining a position parameter of the target area according to the sending parameter of the electromagnetic wave and the reflection parameter of each reflected wave; and according to the road surface type and the position parameters of the target area, determining a target damping control strategy, so that the vehicle performs damping control operation when passing through the target area. According to the method, the vehicle can have sufficient adjusting time for damping debugging when passing through the target area, so that the vehicle has a better damping effect when passing through the target area, and the riding comfort is improved.

The utility model discloses a noise reduction and shock absorption structure of a cooling fan. The noise reduction and shock absorption structure comprises a protective shell; the sound absorption plate is arranged in the protection shell, and a plurality of sound attenuation holes are formed in the sound absorption plate; the sound absorption holes are formed in the sound absorption plate and are connected with the silencing holes; and the silencing fluff is arranged in the silencing holes and the sound absorption holes. According to the noise reduction and shock absorption structure, the cooling fan can be buffered and damped through the multiple shock absorption springs in the protective shell, the shock absorption effect can be enhanced by arranging the shock absorption springs on the periphery of the cooling fan, the cooling fan can be further buffered and damped through the buffer air bag and the connecting plate, and the shock absorption effect is enhanced; noise entering the noise reduction holes and the sound absorption holes can be blocked and weakened through the noise reduction fluff adhered in the noise reduction holes and the sound absorption holes, and the noise entering the sound absorption holes can be reflected and absorbed by the sound absorption holes, so that the noise gradually disappears, and the generated noise is reduced.

The invention relates to the technical field of circuit board preparation, and discloses a multilayer composite circuit board preparation method and a multilayer composite circuit board, and the method comprises the steps: mixing ceramic-based powder with nano metal particles, and carrying out sintering to form a heat-conducting microporous ceramic material with a continuous heat-conducting network and a microporous structure; a plurality of heat-conducting microporous ceramic materials are laminated and then pressed into a composite substrate through vacuum hot pressing, and through heat-conducting through holes are formed in the composite substrate; the composite substrates with the heat conduction through holes are stacked, a micropore layer used for heat conduction and shock absorption is arranged between every two adjacent composite substrates, and the stacked composite substrates and the micropore layers are subjected to vacuum hot pressing to form a multi-layer structure. According to the multi-layer composite circuit board preparation method and the multi-layer composite circuit board, through the continuous heat conduction network, the micropore structure and the micropore layer, the heat conduction performance is remarkably improved, thermal stress and mechanical stress are effectively released through the elastic characteristic of the micropore structure, and the overall stability of the multi-layer composite circuit board is enhanced.

The utility model discloses a damping steel structure, which relates to the technical field of damping and comprises a support plate, a base and a plurality of buffer components. A plurality of guide columns are arranged at the bottom of the supporting plate, inserting grooves are formed in the corresponding positions of the top of the base, first springs are arranged in the inserting grooves, and the guide columns are arranged in the inserting grooves and connected with the first springs; a plurality of strip-shaped grooves are formed in the bottom of the supporting plate and the top of the base, a horizontal rod, a second spring and a sliding block are arranged in each strip-shaped groove, the horizontal rods penetrate through the sliding blocks, the two ends of the second springs are connected with the sliding blocks and the end faces of the strip-shaped grooves respectively, a plurality of cylinders are arranged at the bottom of the supporting plate, buffering grooves are formed in the corresponding positions of the top of the base, and the cylinders are arranged in the buffering grooves. Each buffering assembly comprises a lantern ring, four connecting rods and a third spring, the lantern ring sleeves the cylinder, the two ends of the third spring are connected with the supporting plate and the lantern ring respectively, the four connecting rods are distributed in an X shape, the inner ends of the connecting rods are hinged to the lantern ring, and the outer ends of the connecting rods are hinged to the corresponding sliding blocks. According to the scheme, bolts are omitted, and the risk that the damping steel structure is damaged is reduced.

The invention relates to the technical field of five-axis numerical control milling machines, and provides a multi-angle positioning detection device for axis positioning precision of a five-axis numerical control milling machine, which comprises a five-axis numerical control milling machine body, a fixed seat is fixedly mounted on a machining table of the five-axis numerical control milling machine body, and a dial indicator is fixedly mounted on the fixed seat. A main shaft ball is mounted on an A shaft of the five-axis numerical control milling machine body, an inverted-L-shaped plate is fixedly mounted on a B shaft of the five-axis numerical control milling machine body, a first fixing plate is fixedly mounted at the bottom of the inverted-L-shaped plate, and a U-shaped frame is driven by a first motor, so that the U-shaped frame can drive a fixing ring and a camera to perform angle adjustment under the action of a first connecting rod; and then under the cooperation of the angle adjusting assembly, the angle adjusting range of the camera can be expanded, so that the camera can accurately shoot and recognize, high precision is kept, meanwhile, an unexperienced operator can complete a complex alignment task through simple interface guidance, and the stability and reliability of the detection process are ensured.

The invention relates to the technical field of data processing, and discloses a limit scooter structure design management method and system and a limit scooter. The method comprises the following steps: performing intelligent acquisition and preprocessing on multi-source heterogeneous data to obtain a multi-dimensional comprehensive data set; performing multi-level index construction and nonlinear calculation on the multi-dimensional comprehensive data set to obtain a limit scooter structure design quantitative index system; performing spatio-temporal multi-scale feature analysis on the limit scooter structure design quantitative index system to obtain a spatio-temporal distribution feature map; performing high-order correlation analysis on the spatial-temporal distribution characteristic spectrum to obtain a multi-dimensional correlation intensity distribution matrix among frame geometric parameters, wheel set configuration and a damping system, performing key factor identification and sensitivity analysis to obtain an influence factor importance ranking table, and performing parameterized structure design scheme optimization; and obtaining a multi-target structure design scheme combination and a performance evaluation index set. According to the invention, the efficiency and accuracy of limit scooter structure design management are improved.

The invention discloses a chain wheel traction type villa elevator, and relates to the technical field of elevator safety, the chain wheel traction type villa elevator comprises an elevator shaft, an elevator car body, a rail guide mechanism and a chain wheel traction mechanism, the rail guide mechanism comprises a first guide rail, and a guide wheel assembly comprises a fixed sleeve, a movable sliding rod, a guide wheel support, a rotating wheel and an elastic piece. One end of the movable sliding rod is connected with the fixed sleeve in a sliding fit mode, the other end of the movable sliding rod is fixedly connected with the guide wheel support, the rotating wheel makes contact with the first guide rail, one end of the elastic piece is fixedly connected with the fixed sleeve, and the other end of the elastic piece is fixedly connected with the movable sliding rod. When the elevator runs, relative displacement is generated between the fixed sleeve and the movable sliding rod, the elastic piece in the fixed sleeve is extruded, and the elastic piece deforms, so that vibration and shaking in the elevator running process are absorbed, shaking of an elevator car in the lifting process is effectively reduced, and the riding comfort and safety of passengers are improved.

The invention belongs to the field of material science and metamaterials, and particularly relates to an internal stress self-loading two-rod two-cable tension characteristic negative poisson ratio metamaterial structure which comprises an internal stress self-loading two-rod two-cable tension metamaterial cell element structure and a rotating hinge. The two-rod and two-cable tensioning metamaterial cell element structure capable of automatically loading the internal stress comprises a rigid shell part, a T-shaped rod piece, a pressed elastic assembly, a tensioned elastic assembly and a hydrogel driving assembly. The characteristics of self-stabilization, self-recovery, self-adjustment and the like of the overall tensioning structure are combined, the unique deformation mechanism of the negative Poisson's ratio material is reserved, the local stress concentration effect of a traditional material is overcome, the limitation that the tensioning structure depends on external loading internal stress is broken through, the energy absorption, shock absorption, impact resistance and other performance of the negative Poisson's ratio material are improved, and the tensile strength of the negative Poisson's ratio material is improved. The method is expected to be developed vigorously and can realize application value in multiple fields.

The invention provides a mine hoist skip damping hook visual detection device which comprises a box body, upper hook plates are arranged on the two sides of the upper portion of the box body, and a sensor can be effectively protected against physical damage by arranging a buffer groove and a damping spring. The buffering and damping disc is matched with the fanning strip and the buffering groove to form a damping system, the buffering groove in the fanning strip provides insertion space for the sensor buffering rod, and the damping effect can be further improved. When vibration occurs, the damping disc and the structure thereof can disperse and absorb vibration energy, so that the sensor is protected from being damaged. The sensor mounting slot provides a stable platform for fixing the sensor, and ensures that the sensor can keep correct detection direction and position even under severe conditions. The combination of the linkage telescopic rod and the telescopic rod sleeve allows the sensor unit to flexibly displace within a certain range to adapt to the position change of the skip bucket hook, so that the sensor position deviation caused by equipment movement is reduced, and the detection precision is improved.

The invention belongs to the technical field of functional post-treatment of 3D printing polymer parts, and particularly relates to a shock-absorbing, heat-insulating and sound-absorbing TPU automobile seat cushion and a preparation method thereof. An integral TPU seat cushion with a hollow structure is formed by adopting a selective laser sintering (SLS) technology, an epoxy resin-based micro-foaming coating taking glass hollow microspheres as a physical foaming micropore source is prepared, the surface of a hollow lattice supporting body of a TPU seat cushion part is coated with the epoxy resin-based micro-foaming coating, and the coating formed through curing has a micro-foaming structure, so that the surface of the TPU seat cushion part is coated with the epoxy resin-based micro-foaming coating. And the heat insulation and sound absorption effects in the automobile running process are effectively improved. The micro-foaming coating also has toughening, heat-insulating and wear-resisting properties at the same time, and the coating infiltrating into the micro-gaps on the surface layer of the selective laser sintering TPU workpiece in the coating process forms an anchoring structure after being cured, so that the adhesive force of the coating to the TPU substrate is improved, and the service life of the automobile seat cushion is prolonged.

The present invention belongs to the technical field of underwater drilling and blasting, and in particular, is a combined protective device of a bubble curtain and a vibration reduction hole for underwater drilling and blasting, comprising a bedrock, an air outlet and a fixed rope, wherein a vibration reduction hole is arranged inside the bedrock, a clamp is fixed at the lower left side of the air outlet, a counterweight is arranged below the fixed rope, a first leather hose is connected above the bubble curtain tube, and a connecting mechanism is installed above the first leather hose. The combined protective device of a bubble curtain and a vibration reduction hole for underwater drilling and blasting removes water from the vibration reduction hole through bubbles generated by the bubble curtain tube, thereby solving the problem that water in the hole cannot be removed, and enhancing the shock-absorbing effect of the vibration reduction hole. There is no need to set up multiple rows of vibration reduction holes, thereby reducing costs. A large number of bubbles are removed from the orifices of multiple vibration reduction holes, thereby forming a stable bubble curtain, which has a better weakening effect on underwater shock waves than traditional bubble curtains, and multiple bubble curtain tubes reduce the failure rate.

The invention discloses a vehicle air suspension system and a vehicle, the vehicle comprises a power battery, and the system comprises at least one air suspension device; the air compressor is connected with at least one air suspension device; the vehicle-mounted charger is connected with the power battery and the air compressor and used for converting direct current provided by the power battery into alternating current to supply power to the air compressor in the first working mode, so that the air compressor outputs compressed air to drive at least one air suspension device. According to the suspension system, the power battery is adopted for high-voltage power supply, the vehicle-mounted charger is reused for supplying power to the air compressor to drive the multiple air suspension devices, driving current can be reduced, loss is reduced, heating is not prone to occurring, the diameter of a distribution wire harness can be reduced, one set of high-voltage control driver can be reduced, and cost is reduced. The cost and the size can be remarkably reduced, and the supporting and damping effects of the vehicle can be improved.

The utility model relates to the technical field of pipelines, and discloses a protection device for a pressure pipeline, which comprises an outer protection ring, a buffer ring and a pipeline main body, two sides of the inner wall of the buffer ring and positions close to the upper and lower parts are respectively provided with two mounting grooves, and damping rods are fixedly arranged in the plurality of mounting grooves. And the lower ends of the multiple damping rods are fixedly connected with connecting bases, the lower ends of the multiple connecting bases are fixedly connected with clamping rings, the outer walls of the multiple damping rods are movably sleeved with damping springs, and a plurality of moving grooves are formed in the positions, close to the front portion and the rear portion, of the outer wall of the buffering ring. According to the damping pipeline, the damping structure is arranged so that the pipeline body can be better damped and protected, the problem that the pipeline body is damaged due to the fact that the pipeline body collides with the outside is effectively solved, meanwhile, the pipeline can be better protected through the internal structure of the pipeline body, and the damping pipeline has better usability.

The utility model relates to the technical field of pig feed stirring, and discloses a stirring device for pig feed processing, which comprises a tank body and further comprises a tank cover arranged at the top of the tank body, a driving part is arranged at the top of the tank cover, and a stirring part is arranged in the tank body; the dismounting assembly is arranged in the tank body and used for dismounting the stirring part, the dismounting assembly comprises a first connecting pipe, the first connecting pipe is arranged at the bottom of the driving part, the outer side of the first connecting pipe is fixedly connected with a clamping block, and the inner wall of the clamping block is fixedly connected with a second connecting pipe; by arranging the tank cover, the tank body can be conveniently sealed, pig feed is prevented from splashing, by arranging the driving piece, the stirring piece can be conveniently driven, by arranging the stirring piece, the pig feed can be conveniently stirred, by arranging the disassembling assembly, the stirring piece can be conveniently disassembled, and by arranging the damping assembly, the pig feed can be conveniently stirred. And the main body can be conveniently damped.

The anti-loosening hanging bracket comprises a fixing plate, a U-shaped support is arranged below the fixing plate, a plurality of rectangular branch pipes are fixedly connected to the bottom of the U-shaped support, threading sleeves are fixedly connected to the bottom ends of the rectangular branch pipes, and rectangular sliding holes communicated with the interiors of the corresponding rectangular branch pipes are formed in the inner walls of the tops of the threading sleeves. Vertical missile buffer assemblies are fixedly connected to the two sides of the bottom of the fixing plate, the two vertical missile buffer assemblies are sleeved with a U-shaped support, and the same elastic tightening pressing and fixing assembly is slidably arranged in a rectangular branch pipe and a corresponding rectangular sliding hole in a sleeved mode. According to the utility model, a series of structures are arranged, so that a plurality of cables can be synchronously, rapidly, stably, elastically, tightened and fixed to prevent loosening, one-by-one fixation is not needed, the fixing efficiency and stability are improved, stable tightening and fixed pressing can be ensured when the cables vibrate, and vertical elastic buffering force unloading can be carried out on the cables at the same time; and the safety of hanging and supporting a plurality of cables is improved.

The invention relates to the technical field of building design, and discloses a shock absorption and isolation structure of an anti-seismic building, comprising: a protection box for fixing a bridge foundation and providing mounting positions for other components; the shock isolation assembly is installed on one side of the bridge foundation and used for reducing vibration transmitted to a building; the damping assembly is installed in an inner cavity of the shock isolation assembly, and a magnetic field is formed through electrification to increase swing damping of the balance weight ball; the damping assembly comprises a shielding ring, the shielding ring is installed in an inner cavity of the protection box, the inner wall of the shielding ring is sleeved with multiple sets of electromagnetic coils, and one end of each electromagnetic coil is connected with a power supply cable. And through the damping effect of the electromagnetic coil and the counterweight ball, the absorption efficiency of vibration energy is remarkably improved. The magnetic field generated by the electromagnetic coils effectively inhibits swinging of the counterweight ball and dissipates vibration energy, the multiple sets of electromagnetic coils adjust the magnetic field intensity in real time, the damping effect is optimized according to the vibration intensity, impact of energy concentration on the structure is avoided, and therefore damage of vibration to a building is effectively reduced.

The invention discloses a mineral casting prepared based on modified epoxy resin. Diacid is used for modifying epoxy resin to enhance the temperature resistance of the epoxy resin. The compressive strength of the mineral casting and the bonding strength between the epoxy resin and the aggregate are enhanced in a manner of combining the curing agent and post-curing treatment; by adding the dispersed nano silicon dioxide into the epoxy resin, the damping ratio of the mineral casting is effectively improved, and the shock absorption performance of the mineral casting is enhanced.

The electric fusion welding machine comprises a welding machine body, a movable grip, an adjusting knob, heat dissipation fins and an input interface, the adjusting knob is installed in front of the welding machine body, a state display screen is arranged on the left side of the adjusting knob, the heat dissipation fins are arranged below the state display screen, and an output interface is arranged below the heat dissipation fins. An output interface is arranged in the welding machine body, a binding post is arranged in the output interface, a supporting spring column is arranged below the welding machine body, supporting spring wheels are installed on the supporting spring column, supporting spring blocks are installed on the supporting spring wheels, and heat dissipation fins are arranged on the two sides of the welding machine body. The spring plate structure has a good damping effect, the spring plate structure has a good bearing effect, and the L-shaped interface grip fixedly connected above the power supply connector is matched with the limiting head on the power supply connector, so that plugging and unplugging can be facilitated.

The utility model discloses a reinforced comb tooth type vibration and noise reduction maintenance-free expansion joint structure, and relates to the technical field of bridge expansion joint structures, in particular to the reinforced comb tooth type vibration and noise reduction maintenance-free expansion joint structure which comprises a base, a water stop belt and a strip-shaped plate, and a cavity block is installed at the top of the base. According to the reinforced comb tooth type vibration and noise reduction maintenance-free expansion joint structure, through the arrangement of a water stop belt, a strip-shaped plate, a cavity block, a limiting spring, a positioning sliding block, a limiting rod, a pulling plate, a positioning block, a connecting rod, a pressing plate and a clamping block, the reinforced comb tooth type vibration and noise reduction maintenance-free expansion joint structure has the effect that the water stop belt is convenient to disassemble and replace; the clamping block plays a positioning role, the position of the water stop belt is limited through downward pressing of the pressing plate, the position of the positioning block is limited through the limiting rod, installation of the water stop belt is facilitated, on the contrary, rapid disassembly of the water stop belt is facilitated, and the purpose of improving practicability is achieved.

The utility model relates to the technical field of building construction, in particular to a damping base for building construction electromechanical equipment, which comprises a supporting seat fixed on the top surface of a base plate body, and a fixing plate sleeved on the surface of the supporting seat, and is characterized in that a supporting spring is arranged between the supporting seat and the fixing plate, and the surface of the supporting seat is connected with an integrated plate in a sliding manner; the integrated plate is in contact with the surface of the supporting spring, and the integrated plate has a supporting effect on the supporting spring; the damping device has the beneficial effects that in the deformation process of a supporting spring, the supporting spring can extrude an integrated plate, and an elastic plate always abuts against a sliding ring, so that the integrated plate cannot easily move in the process of being extruded by the supporting spring, the supporting spring is also extremely slowly deformed, and the damping effect of the damping device is better.

The utility model relates to a finish turning excircle tooling for processing high hardness thin wall cylindrical part, including support shaft sleeve, expansion sleeve, support piece, wedge block, pull rod, pressure plate, bolt and thin wall cylindrical part, the expansion sleeve is provided in the thin wall cylindrical part, the outer ring surface of expansion sleeve is matched with thin wall cylindrical part inner surface, the support shaft sleeve extends into the expansion sleeve, the support piece is provided with the wedge block, the pull rod is provided with the pressure plate, the bolt is provided with the pressure plate. Wedge blocks and a supporting piece are arranged between the expansion sleeve and the supporting shaft sleeve, the two wedge blocks are symmetrically arranged on the supporting shaft sleeve in a sleeving mode, the supporting piece is arranged between the two wedge blocks in a clamping mode, one wedge block is limited through a shaft ring of the supporting shaft sleeve, the other wedge block is limited through a pressing plate, the pressing plate is connected with a pull rod through a bolt, and the pull rod is arranged in the supporting shaft sleeve. The wedge block and the expansion sleeve are in wedge-shaped connection, and the wedge block and the supporting piece are in wedge-shaped connection. The clamp is simple in structure, the whole expansion sleeve expands outwards, a machined workpiece is evenly stressed, the clamping effect of the clamp is enhanced, and the machining precision is greatly improved.

The utility model provides a leveling crawler chassis of a corn harvester in hills and mountains. The leveling crawler chassis comprises a frame, a walking crawler frame, a walking crawler, a left leveling hydraulic cylinder, a right leveling hydraulic cylinder and a rocker arm mechanism, the walking crawler belt is mounted on the walking crawler belt frame; the frame is a rectangular frame and is fixedly connected to the bottom of the corn harvester; two hydraulic cylinder upper supports are arranged on the inner end surfaces of two middle longitudinal beams of the frame; piston rod ends of the left leveling hydraulic cylinder and the right leveling hydraulic cylinder are hinged to two hydraulic cylinder upper supports of the frame, and cylinder body ends of the left leveling hydraulic cylinder and the right leveling hydraulic cylinder are hinged to two hydraulic cylinder lower supports fixedly connected to the upper end faces of two longitudinal beams of the walking crawler frame; and the two groups of rocker arm mechanisms are fixedly connected between the frame and the walking track frame at a certain interval along the longitudinal axis of the leveling track chassis.

The utility model belongs to the technical field of medical rescue equipment, and particularly relates to a plateau pressurizing medical emergency ambulance which comprises a chassis, an equipment cabin, a pressurizing cabin, a pressurizing module, an oxygen supply module, a medical emergency module and a function guarantee module. The equipment compartment is arranged on the rear side of a cab of the ambulance; the pressurizing cabin is located on the rear side of the equipment cabin and comprises a shell, a heat preservation layer and a damp-proof layer. The pressurizing module comprises a pressurizing host and a gas storage tank; the pressurizing module is used for generating and storing compressed air and conveying the compressed air into the pressurizing cabin. The oxygen supply module comprises an oxygen generator and an oxygen supply terminal; and the oxygen generator is arranged in the pressurizing cabin and is connected with the oxygen supply terminal through a pipeline. And the medical first-aid module is accommodated in the pressurizing cabin. And the function guarantee modules are respectively arranged in the pressurization cabin and the equipment cabin and are used for providing power application, environment control, communication and environment illumination guarantee. The utility model aims to solve the problems of poor cross-country ability, poor comfort and single guarantee function of the existing guarantee equipment.