145results about How to "Play a damping effect" patented technology

The invention relates to a frequency-modulation mass buckling-restrained brace, which comprises a frequency-modulation mass vibration reduction part and a buckling-restrained energy dissipation and vibration reduction part, wherein the buckling-restrained energy dissipation and vibration reduction part consists of steel cores which are connected between important gussets of a structure, sleeved steel tubes which are sleeved on active sections of the steel cores, filled concrete and flexible materials which are glued on the surfaces of the steel cores; the frequency-modulation mass vibration reduction part consists of mass blocks, resilient elements and damping materials; the mass blocks are formed by the sleeved steel tubes and the filled concrete; the resilient elements are made of steel plate springs and fixed between gusset plate connecting pieces and the sleeved steel tubes or fixed between support connecting pieces and the sleeved steel tubes; and the damping materials and the flexible materials between the steel cores and the filled concrete of the buckling-restrained energy dissipation and vibration reduction part are shared. The frequency-modulation mass buckling-restrained brace integrates TMD vibration reduction technology and energy dissipation and vibration reduction technology of buckling-restrained braces, has the characteristics of easy manufacture, convenient assembly, economy and durability, non-maintaining and changeability, and simultaneously has the function of vibration reduction in the horizontal direction and the vertical direction.

The invention belongs to the field of vibration control, and in particular relates to a shear mode magnetorheological fluid damper and a magnetorheological fluid damping vibration isolator with periodic impedance distribution formed by the magnetorheological fluid. The invention comprises a magnetorheological fluid damper and a magnetorheological fluid vibration isolator, the magnetorheological fluid damper and the magnetorheological fluid vibration isolator are connected by a flange, and a sealing ring is arranged at the joint for sealing; the magnetorheological fluid The damper includes three parts: the working cylinder, the piston assembly and the accumulator; the working cylinder includes the cylinder barrel, the upper cover and the piston assembly; the piston assembly includes the hollow piston rod, the piston head installed at the end of the piston rod, Piston guide, magnetic core on piston rod. When no current is applied or the control system fails, the magneto-rheological fluid damping isolator becomes a traditional damper, which also has a certain damping force and can play a role in reducing vibration. The arrangement of multi-layer electromagnets constitutes a phonon crystal structure, and the introduction of a phonon crystal structure can realize the isolation of elastic wave vibration in the middle and low frequency bands.

The invention provides a forked type piezoelectric stack damping ring which comprises piezoelectric stacks, a forked type protection frame, an outer ring and an external shunt circuit, wherein the forked type protection frame is arranged on a bearing in a sleeving manner, the outer ring is arranged on the forked type protection frame in a sleeving manner and is fastened on the forked type protection frame; the forked type protection frame is of a symmetrical annular structure with a concave cross section; a plurality of piezoelectric stacks are distributed between an inner wall and an outer wall of a notch with the concave shape structure; two end faces of each of the piezoelectric stacks are respectively bonded on the inner wall and the outer wall of the notch; the polarization directionof each of the piezoelectric stacks is identical as the pressure load direction of the bearing received by the forked type protection frame; and all the piezoelectric stacks access an external circuitafter being connected in parallel, and are connected in series with a resistor and an inductor. With adoption of the forked type piezoelectric stack damping ring, vibration of a drive system transmitted to a support through a shaft and the bearing can be effectively reduced through a piezoelectric shunt damping technology, a tangential stress and a torque born by the piezoelectric stacks can be effectively avoided, and the service life of the piezoelectric stacks can be prolonged.

The invention relates to a vehicle, a magnetorheological fluid type vehicle shock absorbing seat control device and a magnetorheological fluid type vehicle shock absorbing seat control method. The magnetorheological fluid type vehicle shock absorbing seat control device comprises a seat body, a damping assembly, an elastic sealing connection component, a box body, an acceleration sensor and an ECU, wherein the damping assembly comprises a damping plate which is fixedly connected to the bottom part of the seat body in a perpendicular manner, and a damping hole penetrating the damping plate; a magnetorheological fluid is internally packaged in the box body, and the box body is in sealing connection with the damping assembly by means of the elastic sealing connection component; the damping assembly suspends in the magnetorheological fluid and can be kept in a state of separation from the inner surface of the box body; the acceleration sensor is used for acquiring seat acceleration information and transmitting the seat acceleration information to the ECU; and the ECU is used for receiving the seat acceleration information acquired by the acceleration sensor, and calculating a current control quantity applied to the magnetorheological fluid according to the seat acceleration information, so as to control damping characteristics of the magnetorheological fluid flowing through the damping hole. The magnetorheological fluid type vehicle shock absorbing seat control device can realize the shock absorption of the seat body, and is conductive to enhancing the comfort of a passenger sitting on the seat.

The invention discloses a lithium battery drop resistance device. An acceleration sensor is arranged between an outer tank body and a lithium battery body, the acceleration of a moving lithium battery can be detected through the acceleration sensor, and thus whether the lithium battery is dropped off or not can be judged; furthermore a plurality of damping parts and buffer parts are arranged between the lithium battery and the outer tank body, and furthermore a control chip is configured, so that all electromagnetic valves are controlled to be opened by the control chip when the acceleration sensor detects that the lithium battery is dropped off, a compressed spring is popped out, honeycomb rubber is also popped out, then the lithium battery can be fixed among all pieces of honeycomb rubber and is prevented from being directly dropped onto the ground, and a damping function is achieved; and meanwhile, after the electromagnetic valve of a compressed air cylinder is opened, compressed air is fed into an airbag, the airbag is popped out, after the airbag is inflated, a buffer function is achieved, and thus the lithium battery can be further prevented from being damaged.

The invention discloses a shell device for local reactive power compensation. The shell device comprises a box body and a roof cover, wherein the box body and the roof cover form a hollow chamber for containing a local reactive power compensation device; the front surface and the rear surface of the box body are provided with box doors; a heat dissipating mechanism is arranged on one side surface of the box body, two wire entrance holes for containing connecting wires of the local reactive power compensation device are formed in the other side surface of the box body in an up-down manner, a pair of parallel first guide rails and a movable plate for placing the local reactive power compensation device are arranged at the lower ends of the left inner side surface and the right inner side surface of the box body, and a layer of flexible plastics for reducing the vibration of the local reactive power compensation device is arranged on the movable plate. The shell device has the good noise reduction, heat dissipation, dust-proofing and insulating effects, can be used in outdoor occasions, damp ground occasions, and occasions with strong vibration, can well protect the local reactive power compensation device in the device and enables the local reactive power compensation device to normally run in a good environment.

The invention discloses a reversible planetary wheel set running mechanism. The reversible planetary wheel set running mechanism comprises a driving shaft capable of rotating in double direction and a planetary wheel set. The driving shaft is installed on a vehicle frame. The planetary wheel set is installed on the driving shaft. A one-way bearing and a center driving gear are installed on the driving shaft in a sleeving mode. The planetary wheel set comprises a planetary frame, a planetary wheel and a reverse transmission device. The planetary wheel and the reverse transmission device are fixed on the planetary frame. The planetary frame is connected with an outer ring of the one-way bearing. The planetary wheel is connected with the center driving gear through the reverse transmission device. The reversible planetary wheel set running mechanism has good heading and obstacle crossing functions and is simple in structure, easy to control and suitable for application of all-terrain vehicles.

The invention discloses a vibration reduction device suitable for an aero-engine reduction box. The vibration reduction device comprises an output shaft used for being connected with the reduction box, a power transmission mechanism used for transmitting the torque from an aero-engine to the output shaft, a spring seat arranged on the output shaft in a sleeving mode and a spring assembly which is arranged between the spring seat and the power transmission mechanism and used for applying an axial elastic acting force to the power transmission mechanism. According to the vibration reduction device suitable for the aero-engine reduction box, the spring assembly is arranged to absorb the torsional vibration energy of the engine, a buffering effect is achieved between the engine and the reduction box, then the vibration reduction effect is achieved, through shaft teeth in the reduction box, a gear is prevented from being damaged, and the reliability and comfort of an aero-power assembly are improved.

The invention discloses a circulating type cutting and crushing treatment device for soil contamination. The circulating type cutting and crushing treatment device comprises a processing housing and acirculating housing, wherein the circulating housing is arranged at the right side of the processing housing; a charge tube and a stirring pipeline are arranged on the processing housing; stainless steel blades, a metal frame and cutting blades are arranged on the stirring pipeline; a lifting rotary shaft, spiral blades, a filter screen plate and a water drainage hole are arranged at the upper end of the circulating housing; a circulating outlet and a circulating inlet are formed between the processing housing and the circulating processing; the right wall of the circulating housing is equipped with a discharge pipeline; the right side of the upper end of the circulating housing is riveted with a motor; the left side of the lower end of the processing housing and the right side of the lower end of the circulating housing are symmetrically and perpendicularly welded with supporting rods; and the lower ends of the supporting rods are connected with anti-sliding bases. The circulating type cutting and crushing treatment device can synchronously add treatment reagents while stirring contaminated soil at a high speed, and are matched with the circulating housing to improve soil treatment efficiency; and the bottom supporting rods, the anti-sliding bases, a slide connecting rod, slide sleeves and movable supporting rods can be matched to damp and support.

The invention belongs to the technical field of rolling mill vibration reduction devices, and particularly relates to a grading vibration reduction device based on magnetic force. The device comprisesan annular connecting disc, a central disc, an annular support and a spline shaft. The spline shaft and the central disc are connected into a whole through interference fit. A cavity and vibration reduction windows are arranged in the annular connecting disc. Two magnets the same in magnetic pole, a hydraulic transmission device with a telescopic rod and an arc-shaped push rod are arranged in each vibration reduction window. Spring push rods are mounted on the annular support. The central disc rotates to drive the spring push rods to do translation up and down, and the arc-shaped push rods are driven by the spring push rods to move, so that the two magnets in each vibration reduction window get close to each other to generate mutual repulsive magnetic force to achieve vibration reduction.The device has the advantages that torsional vibration and vertical vibration of a transmission system can be restrained, the restraining degree is changed in a graded manner according to the actualvibration condition, and then the torsional vibration restraining effect is improved.

The invention discloses a circular-swing loosening treatment device for contaminated soil. The device comprises a processing shell and a circulation shell, the circulation shell is arranged on the right side of the processing shell, the processing shell is provided with a material inlet pipe and a stirring pipeline, the stirring pipeline is provided with ring sleeves, rotating rods, swinging steelballs, stirring rods, stirring fins and flakes, the upper end of the circulation shell is provided with a lifting rotation shaft, a spiral blade, a filter screen plate and a water discharging opening, the right wall of the circulation shell is provided with a material discharging pipeline, a motor is riveted on the right side of the upper end of the circulation shell, supporting rods are symmetrically and vertically welded on the left side of the lower end of the processing shell and the right side of the lower end of the circulation shell, and the lower end of each supporting rod is connected with an anti-skid base seat. The device provided by the invention can stir the contaminated soil at a high speed and can synchronously add a treatment medicine, the soil is loosened through the swinging stirring rods and the swinging steel balls, the circulation shell is added to improve the soil treatment efficiency, and cooperation of the supporting rods, the anti-skid base seats, a sliding connection rod, sliding sleeves and movable supporting rods which are arranged at the bottom can reduce vibration and provide supporting.

The invention discloses a novel absorber based on PZT (piezoelectric ceramic). The novel absorber comprises an outer shaft sleeve, elastic structures, tile blocks, PZT and a metal rubber block, wherein the outer shaft sleeve, the elastic structures and the tile blocks are of an integrated structure; the outer shaft sleeve and the tile blocks are in flexible connection through the middle elastic structures; the elastic structures and PZT are circumferentially distributed between the tile blocks and the outer shaft sleeve; grooves are designed in the middle parts of the elastic structures; PZT is placed in the grooves; the metal rubber block is mounted in the grooves in the two sides of PZT and the elastic structures; and the metal rubber block and PZT are in parallel connection and support the tile blocks. The novel absorber provided by the invention has the characteristics that bearing capacity is high, rigidity is high, damping is high, damping characteristics can be actively controlled, and the like.

The invention discloses a displayer conveniently subject to multi-angle adjustment, and relates to the technical field of displayers. When a display screen vibrates, a piston plate does reciprocated movement, through a pressure spring and the damping effect of damping media, the piston plate is subject to vibration reduction, the vibration reduction effect is obvious, the display screen is protected, and the service life is prolonged; due to the fact that magnetic-south poles and magnetic-north poles of first magnets and second magnets are opposite in direction, a first rotating handle is manually rotated, the first magnets and the second magnets with different numbers coincide, the magnitudes of repulsive force are different, and therefore through manual twisting of the first rotating handle, the height of the display screen can be conveniently adjusted; through manual twisting of a second rotating handle, through the effect of an outer groove wheel mechanism, a driving gear drives adriven gear to rotate, and the pitching angle of the display screen can be adjusted; and due to the characteristics of one-way rotation of the outer groove wheel mechanism, after rotation of a secondrotation handle is finished, the display screen can be limited, and operation is easy.

The invention discloses an automobile engine suspension mounting structure. A left suspension and a right suspension are mounted on the left side and the right side of a cylinder body respectively, a rear suspension is mounted on a tail housing of a transmission, each of the left suspension and the right suspension comprises an elastomer, an upper limiter, a lower limiter and a suspension support, the rear suspension comprises a rear suspension support and a rear suspension cushion assembly, the side plates of the lower limiters extend upwards, the upper portions of the extending parts of the lower limiters are folded inwards to form limit portions, the rear suspension support is a 'U'-shaped frame, the left end and the right end of an upper suspension plate extend downwards and extend horizontally towards the inner side after overpassing the ends of a lower suspension plate, and the middle of the front end of the lower suspension plate first extends forwards and then extends vertically upwards to form a forward-rush preventing limit plate. A forward-rush preventing rubber cushion block is sleeved with the forward-rush preventing limit plate, the middle of the rear end of the lower suspension plate extends backwards and then extends vertically upwards to form a backward-rush preventing limit plate, and a backward-rush preventing rubber cushion block is sleeved with the backward-rush preventing limit plate. The automobile engine suspension mounting structure is not easy to fail.

The invention discloses an energy-absorbing automobile engine suspension. One end of the energy-absorbing automobile engine suspension is fixedly connected to the engine damping block on an automobilechassis through a mounting buckle, and the other end of the energy-absorbing automobile engine suspension is fixedly connected to an automobile engine through a mounting buckle. The energy-absorbingautomobile engine suspension comprises the mounting buckles, a shell, a spiral steel wire rope damper, a hydraulic damper and a magneto-rheological damper, the magneto-rheological damper further comprises a piston, a high magnetizer, an exciter coil, an annular magnet and a resistive ring and the like, the hydraulic damper further comprises a hydraulic cylinder, an oil storage tank and a damping control valve and the like, and the spiral steel wire rope damper further comprises a limiting plate, a spiral steel wire rope and a guiding rod and the like. Compared with a traditional hydraulic suspension, the energy-absorbing automobile engine suspension further has the advantage of active suspension, and self damping and stiffness can be changed according to the engine vibration changes so asto meet damping and noise reduction requirements of an automobile under the multiple conditions of the wide broadband as the energy-absorbing automobile engine suspension ingeniously connects the spiral steel wire rope damper, the hydraulic damper and the magneto-rheological damper in parallel to form an active suspension system.

The invention provides a vibration reduction ring based on an annular piezoelectric stack. The vibration reduction ring comprises the annular piezoelectric stack, a protective frame and an external shunt circuit, wherein the protective frame is a ring-mounted structure which sleeves a bearing, the protective frame is formed by combining an upper U-shaped protective frame and a lower U-shaped protective frame, the U-shaped grooves of the upper U-shaped protective frame and the lower U-shaped protective frame are combined into an annular empty groove, the annular piezoelectric stack is installedin the annular empty groove, the annular piezoelectric stack is connected with the external circuit, and a resistor and an inductor are connected in series. According to the vibration reduction ring,the vibration of a transmission system transmitted to a supporting bearing through a shaft and the bearing can be effectively reduced by utilizing piezoelectric shunt damping technology, the piezoelectric stack can be effectively prevented from bearing tangential stress and torque, and the service life of the piezoelectric stack is prolonged.

The invention relates to the technical field of equipment for inflation-free tires, and provides a novel inflation-free tire. The novel inflation-free tire comprises a tire and a wheel hub, wherein the tire sleeves the wheel hub; the tire comprises a tire body, a tire crown and a tire root, wherein one side, close to the wheel hub, of the tire body is connected with the tire root, the tire root sleeves the rim of the wheel hub, and the other end of the tire body is connected with the tire crown; and the tire body, the tire crown and the tire root are mutually connected to form a closed structure, and the closed structure is internally provided with a foaming tire core. According to the novel inflation-free tire, disadvantages of the prior art are overcome, the design is reasonable, the structure is compact, and the problems that a conventional inflatable tire is easy to burst, a solid tire is easy to slip and shift, and damping effect is poor can be solved. Rubber is used as a foamingmaterial in the novel inflation-free tire, so that damping effect can be improved through excellent elastic performance of the rubber, and meanwhile connection effect of the tire and the wheel hub isimproved, and the shifting is avoided; and in addition, the thickness of the tire body is reduced, thus preventing tire slip. Therefore, the novel inflation-free tire has very strong practicability.

The invention provides a guiding device of the counterweight housing of an elevator and relates to the improvement of the vertical operation guiding device of the counterweight housing of the elevator. The guiding device has simple structure and is convenient to transport. The invention is characterized in that the counterweight housing is arranged in an elevator shaft and operates between the upper end of the elevator shaft and the lower end, a lifting device is connected with the top of the counterweight housing, a pair of guide ropes are arranged between the upper end of the elevator shaft and the lower end, the two sides of the counterweight housing are connected with the guide ropes; the guide ropes are tightened between the upper end of the elevator shaft and the lower end by an upper locking clamp and a lower guide rope tightening device, and antivibrators are separately fixedly connected with the guide ropes on the upper part of the locking clamp and the lower part of the guide rope tightening device. The rigid guide rails of the original guiding device of the counterweight housing are replaced by the flexible guide ropes, thus the guide ropes can be wound during transportation. Considering that the operating environment of the elevator has regular vibration sources, in order to avoid that the vibration sources drive the guide ropes to form a resonance or even a harmonic vibration, the antivibrators are arranged on the guide ropes so as to adapt to the frequencies of different driving sources and have the effects of eliminating vibrations and reducing noises.

The invention provides a supporting component used for a similar simulation test of a high-speed rotor and a testing method, and belongs to the field of similar design of the high-speed rotor. The supporting component comprises a bearing, multiple rotor cages and a testing platform support. The bearing is used for supporting the simulation rotor to rotate, inner diameters of the rotor cages are identical and are matched with the outer diameter of the bearing, the rigidities of the rotor cages are different, in the test, different rotor cages are selected to sleeve the exterior of the bearing respectively, and the selected rotor cages and bearing are fixed through the testing platform support to simulate different supporting rigidities. The supporting rigidity of the provided supporting component can be two times or above that of a rotor original part, and the supporting component has high adjustment capacity for the supporting rigidity of a rotor system.

The invention discloses a small-sized unmanned aerial vehicle real-time tensile force detection apparatus and detection method, which belongs to the technical field of force measurement. The small-sized unmanned aerial vehicle real-time tensile force detection apparatus comprises an installation foundation support, an air cylinder, a motor and a paddle, wherein the installation foundation supportis fixed on a machine body and provided with a pressure sensor, an attitude sensor and the air cylinder; a piston is installed in the air cylinder, the shape of the piston is matched with the shape ofan inner wall of the air cylinder, the piston can slide relative to an air barrel, the air cylinder is also provided with an air valve and a vent hole, and when the air valve is opened, air can enterand exit the cylinder body freely. When the air valve is closed, the cylinder body and the piston form a sealing space. The vent hole is arranged on the bottom of the air cylinder and connected witha pressure sensor by virtue of an air pipe. The tensile force of the propeller is converted to the movement of the piston, and then the tensile force is indirectly measured in a pressure form in the air cylinder. By adopting the technical scheme, the real-time tensile force measuring structure is simplified; and by utilizing the shock absorption characteristic of the air cylinder, a measuring result is more accurate.

The invention belongs to the technical field of slides, and particularly relates to a slide based on a bidirectional clutch. The slide comprises supporting rotating shafts, a belt, a driving mechanism, a square cavity, square climbing blocks and a supporting block. When the slide works, a driving motor is powered on; the driving motor drives a clutch input shaft to rotate through a driving motor output shaft; the clutch input shaft rotates and drives a first gear shaft to rotate through a clutch output shaft; the first gear shaft rotates and drives a second gear to rotate; the second gear rotates and drives a first gear to rotate; the first gear rotates and drives a second gear shaft to rotate; when the second gear shaft rotates, a damper can not achieve a damping effect on the first gear shaft; when the first gear shaft rotates, the supporting rotating shaft, on the upper side, in the three supporting rotating shafts can be driven to rotate; then, the belt is driven to rotate around the outer side of the three supporting rotating shafts; the belt rotates and drives the square climbing blocks on the belt to rotate around the outer side of the three supporting rotating shafts. In this way, children can play with the square climbing blocks and the belt.

The invention belongs to the field of dampers and intelligent materials and in particular relates to a novel magneto-rheological fluid damper composed of a magneto-rheological fluid shearing mode and a magneto-rheological fluid. One part of the novel magneto-rheological fluid damper is formed by periodically arranging an electromagnet group and an energy accumulator group and the other part of the novel magneto-rheological fluid damper is composed of an outer control system; a magneto-rheological fluid impedance applies an electric field by an electromagnet according to the outer environment and then the magneto-rheological fluid damper is adjusted; the magneto-rheological fluid damper comprises a working cylinder, a piston assembly, an energy accumulation group and the electromagnet group; the piston assembly comprises a hollow piston rod and a piston guide device which is coaxially arranged on the hollow piston rod; a piston head is fixedly connected with the hollow piston rod. When current effect is not applied or the control system has faults, the magneto-rheological fluid damper is changed into a traditional damper and also has a certain damping force to realize vibration damping effect.

The invention discloses a stirring type soil pollution circular treatment device. The stirring type soil pollution circular treatment device comprises a machining shell and a circulating shell. The right side of the machining shell is provided with the circulating shell. The machining shell is provided with a feeding pipe and a stirring pipeline. The stirring pipeline is provided with a stirring rod, stirring fins and scales. The upper end of the circulating shell is provided with a lifting rotating shaft, spiral blades, a filter net plate and a water draining opening. A circulating outlet anda circulating inlet are formed between the machining shell and the circulating shell. The right side of the circulating shell is provided with a discharging pipeline. The discharging pipeline is provided with a valve. The right side of the upper end of the circulating shell is provided with a motor in a riveted manner. Supporting rods are symmetrically and perpendicularly welded to the left sideof the lower end of the machining shell and the right side of the lower end of the circulating shell. The lower ends of the supporting rods are connected with anti-skid bases. According to the stirring type soil pollution circular treatment device, polluted soil can be stirred at a high speed, an agent can be added synchronously, the circulating shell is additionally arranged in a coordinating manner so that the soil treatment efficiency can be improved, and by means of coordination of the bottom supporting rods, anti-skid bases, sliding connection rods, sliding sleeves and movable fulcrum bars, damping supporting can be achieved.

The invention discloses an ultra-wide insecticide sprayer rack. A balance hanging pin (5) is arranged on a support (4), a spraying frame (6) is hung on the balance hanging pin (5) and kept balanced by the full utilization of the balance principle, a shock absorber (11) can achieve the good buffer function when the spraying frame (6) swings left and right, and then the ultra-wide folding spraying frame can be installed. A balance oil cylinder (13) is arranged at the bottom end of the spraying frame (6), and balance springs (14) are arranged at the ends of the balance oil cylinder (13), so that the further shock absorbing effect can be achieved, and the balance oil cylinder can be utilized to adjust balance. Compared with the prior art, the ultra-wide folding spraying frame can be arranged, the good balance effect can be achieved, the balance oil cylinder can be utilized to adjust balance when an insecticide sprayer loses balance when being used in an uneven farmland, and therefore using efficiency of the insecticide sprayer is greatly improved.

The invention provides a battery pack cooling structure and a battery pack, and relates to the technical field a power battery. The battery pack cooling structure comprises a tray and cooling units fixedly arranged on the tray; each cooling unit comprises a liquid cooling pipe and a thermal insulation pipe sleeve for packaging the liquid cooling pipe; the lower surface of each thermal insulation pipe sleeve is fixedly connected with the upper surface of the tray; each liquid cooling pipe comprises a cooling plate fixedly arranged below a battery module and a cooling pipe packaged in the thermal insulation pipe sleeve; and the cooling plate and the cooling pipe are in contact and fixedly connected. The battery pack cooling structure provided by the invention has the characteristics of highpracticability and excellent thermal management performance.

The invention provides an anti-corrosion and high-flux double-liquid damper. The anti-corrosion and high-flux double-liquid damper comprises an outer sleeve and two symmetric damping structures; eachdamping structure comprises a magnetorheological fluid cylinder, a shear thickening fluid cylinder and a core column; the shear thickening fluid cylinders are coaxial with the outer sleeve, and axes of the magnetorheological fluid cylinders and the outer sleeve are parallel; the big end of each core column is arranged in the corresponding shear thickening fluid cylinder, and the small end extendsout of the top of the outer sleeve; the three magnetorheological fluid cylinders are arranged in the same plane and located at three vertices of an equilateral triangle respectively, and the adjacentmagnetorheological fluid cylinders are connected through a first connecting part; the bottoms of the shear thickening fluid cylinders are connected with the tops of the three magnetorheological fluidcylinders through second springs and second connecting parts; the two symmetric damping structures are connected through first springs; the core column of one damping structure extends out of the topof the outer sleeve and is fixed with the outer sleeve; and a magnet exciting coil is arranged on the inner wall of each magnetorheological fluid cylinder. The damper has a good damping effect, can beeffectively resistant to wear and corrosion, can realize automatic restoration and has a wider applicable load range.

The invention discloses a refrigerator, relates to the technical field of storage equipment, and aims at solving the problems that a vacuum pump of an existing refrigerator is complex in damping structure and not ideal in damping effect. The refrigerator comprises a refrigerator body, a mounting box, a damping sleeve and the vacuum pump; a storage chamber is arranged inside the refrigerator body;the mounting box is fixed in the storage chamber, and a mounting cavity is formed inside the mounting box; the damping sleeve is arranged in the mounting cavity, and the outer wall of the damping sleeve abuts against the inner wall of the mounting cavity; the vacuum pump is arranged in the damping sleeve, and the inner wall of the damping sleeve is tightly attached to the outer wall of the vacuumpump. The refrigerator is used for storing food materials.

The invention discloses an air transmission material receiving device for a die-cutting machine. The air transmission material receiving device for the die-cutting machine comprises a material receiving plate and a pair of base plates. The upper portion of the left base plate is fixedly connected with an inverted U-shaped installation frame. The installation frame is fixedly provided with a threaded fastener in a nested manner. Internal threads are arranged in the threaded fastener. A threaded column is connected into the threaded fastener in a threaded manner. The upper portions of the pair of base plates are both provided with fixing plates. A rotating handle is manually rotated, so that the threaded column is moved, the left fixing plate can move, and then the inclination angle of the material receiving plate can be conveniently adjusted; and in this way, the sliding speed of the semi-finished products on the material receiving plate can be conveniently adjusted, and operation is easy, rapid and convenient. When the semi-finished products fall onto the material receiving plate, under the action of spiral springs, the damping effect is achieved; fan impellers rotate, so that thesemi-finished products on the upper part of the material receiving plate are cooled, the temperature of the semi-finished products is lowered, and the quality of the semi-finished products is improved.

The invention discloses a gear reduction motor with high meshing precision, which comprises a motor and a reduction gearbox, the motor is mounted on the front surface of the reduction gearbox, a junction box is mounted on the top surface of the motor, the output end of the motor is connected with a rotating shaft, and the surface of the rotating shaft is sleeved with a self-checking sun gear. An alarm plate is installed on the surface of one side of the reduction gearbox through bolts, two sets of symmetrically-arranged rubber cushion plates are connected to the bottom of the reduction gearbox in an embedded mode, two sets of lifting rods arranged front and back are installed on the tops of the rubber cushion plates, a lubricating box is installed on the inner top wall of the reduction gearbox, and lubricating grease is contained in the lubricating box. By arranging the self-checking sun gear, during rotation, the effective meshing area and pressure between a surface gear tooth piece and the planetary gear can be detected through the photosensitive sensor and the pressure sensor in the self-checking sun gear, the auxiliary device judges the meshing state between the self-checking sun gear and the planetary gear, and then the overall meshing precision of the device is improved.