14449 results about "Shock absorber" patented technology

The invention relates to the technical field of shock absorber defect detection, and discloses an electric vehicle shock absorber defect detection method and system based on machine vision, and the method comprises the steps: collecting an initial image set under the irradiation of a multi-angle light source through high-resolution imaging collection equipment; performing denoising and filtering processing according to the initial image set to obtain clear image data; performing defect classification and spatial distribution analysis according to the clear image data to obtain surface feature vectors containing defect types and defect spatial distribution; carrying out vibration amplitude acquisition and phase angle measurement operation according to the surface feature vector, and carrying out spectral analysis to construct a performance parameter vector; performing data fusion according to the performance parameter vector and the surface feature vector to obtain a fusion feature; inputting the fusion features into a pre-constructed association prediction model to obtain defect prediction data; and performing defect influence degree analysis according to the defect prediction data to obtain a defect evaluation result. The method provides a basis for quality control and performance optimization of the shock absorber.

The invention discloses a buffering, shock-proof and anti-collision conveying box for precision equipment, and relates to the technical field of conveying boxes, the buffering, shock-proof and anti-collision conveying box comprises a specially-made wooden box body, a plurality of groups of shock-absorbing blocks are arranged in the specially-made wooden box body, a plurality of groups of shock-absorbing and anti-collision mechanisms are arranged in the shock-absorbing blocks, and a plurality of groups of screw rods are arranged in the specially-made wooden box body. A lead screw is arranged in the special wooden box body, an oblique bevel gear is fixed to one end of the lead screw, a transmission rod is arranged in the special wooden box body, and a plurality of sets of movable supports are arranged in the special wooden box body and meshed with the lead screw. During continuous slight vibration, the contact area is reduced, friction is reduced, meanwhile, a lead screw drives a damping block to be attached to equipment to eliminate resonance, a damping anti-collision mechanism is triggered to work through violent impact, a spring and a damper absorb energy, when the impact exceeds the limit, the damper drives a gear mechanism to open an air valve, and an air bag expands to absorb impact force; the sliding block sleeve guides the expansion direction of the air bag to prevent damage, and the whole system can be dynamically adjusted according to actual impact strength to effectively cope with vibration and impact in transportation.

According to the bearing rigidity optimization and vibration reduction design method for the rotor and the bearing system, under the condition that the structural form of the rotor and the bearing system is not subversively adjusted, the elastic bearing and the extrusion oil film damper are arranged and designed, and the bearing rigidity of the rotor and the bearing system is optimized. The fulcrum rigidity is reduced to change the strain energy distribution of the rotor and adjust the critical rotating speed, and the vibration level of the rotor, especially vibration caused by sudden unbalance and transcritical of the multi-fulcrum rotor, is suppressed.

The invention discloses an automatic shock absorber assembling device and method. The automatic shock absorber assembling device comprises a rack, a rotating disc, a graduator arranged on a shell and used for driving the rotating disc to rotate and a plurality of jigs circumferentially arranged on the rotating disc. The shell and lining feeding and press-fitting mechanism, the transferring mechanism, the sealing cover feeding mechanism, the spin riveting mechanism, the torque detection mechanism and the discharging mechanism are arranged on the machine frame. The shock absorber assembling device has the advantages that the integration degree of all the mechanisms is high, products can be rapidly assembled, the shock absorber assembling efficiency is effectively improved, the size of the whole device is reduced, and the manufacturing cost is saved. According to the shell and lining feeding press-fitting mechanism, linings and shells can be fed at the same time, multiple performance detection of the linings can be completed, synchronous movement of the linings in all assemblies is achieved through the linkage transfer mechanism, and the press-fitting efficiency between the shells and the linings is effectively improved.

Embodiments of the invention provide a plurality of safety features for a pen-stylus. The pen-stylus may comprise a writing shaft that receives mechanical input forces as a user engages the pen-stylus on a display of a tablet device, a force sensor that translates mechanical input forces received from the writing shaft into electrical ones for operation by electronics in the pen-stylus; and a writing shaft impact shock absorber that receives heavy forces imparted to the pen-stylus to shield the force sensor from receiving such heavy forces. The heavy forces impacting the pen-stylus may arise from the pen-stylus being dropped onto a hard surface.

The invention belongs to the technical field of automobile suspensions, and provides an adjustable shock absorber inverse model construction method and system, a medium and equipment. According to the technical scheme, actual measurement data of a shock absorber are obtained; judging whether the relative speed of the suspension exceeds the test speed point range of the shock absorber or not, and if not, performing interpolation calculation on the actually measured data under each current by using the relative speed of the suspension to obtain interpolation damping force; if yes, on the basis of measured data, obtaining prediction functions of speed and damping force under different currents, and combining the relative speed of the suspension and the prediction functions to obtain corresponding predicted damping force under different currents; mapping the obtained interpolated damping force or predicted damping force with the current to obtain current-damping force corresponding relation data under the relative speed of the suspension; the control current is calculated by combining the optimal control force under the relative speed of the suspension and the current-damping force corresponding relation data under the relative speed of the suspension, the method can be suitable for various types of shock absorbers, the method is simple, the universality is good, and the precision can be guaranteed.

The invention discloses a collaborative enhancement energy consumption mechanism and a support arm type fan tower drum damping device with the collaborative enhancement energy consumption mechanism, and relates to the technical field of engineering structure vibration, the collaborative enhancement energy consumption mechanism comprises a liquid column lever assembly and a plurality of inerter damping units symmetrically installed at the end of the liquid column lever assembly, and each inerter damping unit comprises a shell; the hydraulic damper and the linear-rotation converter are sequentially and axially installed in the shell from top to bottom, when the liquid column inclines, the first connecting plate is driven to drive the piston rod to stretch out and draw back, the piston rod drives the flywheel to rotate through the linear-rotation converter, and therefore vibration energy is transmitted to a fixed foundation structure through the second connecting plate to be dissipated; the invention further discloses a supporting arm type fan tower drum vibration reduction device, displacement of the vibration transmission part is transmitted to the liquid column lever through the connecting piece, the inerter damping unit is driven to stretch out and draw back, a complete energy consumption chain of the tower drum, the vibration transmission part, the connecting piece, the liquid column, the inerter damping unit and the ground is formed, and it is guaranteed that energy is stably transmitted to a fixed foundation structure.

The hydraulic damper comprises an oil storage container, a piston is arranged in the oil storage container, and the piston divides the oil storage container into a first oil cavity and a second oil cavity; a piston rod; one part of the first circulating oil way and one part of the second circulating oil way are shared with each other, and damping parts are arranged on the parts and used for applying damping force to the hydraulic oil flowing through the damping parts; at least one first valve is arranged on the first circulating oil way and used for limiting hydraulic oil in the first circulating oil way to only flow from the first oil cavity to the second oil cavity in a one-way mode; at least one second valve is arranged on the second circulation oil way and used for limiting the hydraulic oil in the second circulation oil way to only flow from the second oil cavity to the first oil cavity in a one-way mode. The two-way damping control device has the beneficial effects that under the condition that only one damping valve is used, two-way damping control can be achieved when the artificial limb moves, and the wearing comfort and attractiveness of the artificial limb are improved.

The invention relates to the technical field of industrial mechanism models, in particular to a shock absorber performance optimization control method based on model fusion, which comprises the following steps: extracting a low-frequency disturbance state variable and inputting the variable-topology industrial mechanism model to generate a nominal reference state trajectory; utilizing a depth state observation network fused with energy passivity constraint to calculate a non-linear model mismatch compensation amount and an adaptive weighting parameter; performing dynamic fusion on the nominal reference state trajectory and the compensation amount based on the adaptive weighting parameter to generate a generalized state estimation value; and executing dynamic multi-objective optimization based on the generalized state estimation value, and generating mixed mode control input acting on an execution end. According to the invention, through adaptive fusion of a mechanism model and a data driving method, physical consistency, calculation real-time performance and robustness of a control process are considered.

A tensioner for a belt has a fixed part provided with a pivot defining an axis (A), an eccentric arm rotatably mounted on the pivot about the axis (A), a pulley rotatable about an axis (B) defined by the arm and configured to cooperate with a timing belt, a first spring-damper assembly interposed between the arm and the fixed part, and a second spring-damper assembly configured to act between the arm and the fixed part from a predetermined angle of rotation of the arm with respect to the fixed part.

The invention discloses a magnetorheological damper durability test device, and particularly relates to the field of magnetorheological dampers, the magnetorheological damper durability test device comprises a box body and a to-be-tested magnetorheological damper, the rear end of the box body is provided with a test cavity with a triangular cross section, and the interiors of the left and right inclined side walls of the test cavity are respectively provided with a liquid storage cavity and an equipment cavity. According to the durability test device for the magneto-rheological damper, the material spraying assembly is arranged, water or powder can be sprayed to the magneto-rheological damper, the device is used for simulating a rainy day environment or simulating a dust and gravel road surface, and the complex environment encountered by the magneto-rheological damper in actual use is truly restored; meanwhile, the amplitude adjusting assembly allows the amplitude of vibration applied to the shock absorber to be accurately and continuously adjusted, and road surfaces with different jolting degrees are simulated. According to the invention, environmental factors such as water, dust, temperature, amplitude, inclination angle and the like can be independently controlled, so that test results can more accurately reflect the durability of the magnetorheological damper under specific working conditions, and data one-sidedness is avoided.

The invention discloses a multi-structure novel auxetic metamaterial replaceable energy dissipation metal damper, and relates to the technical field of anti-seismic equipment, the multi-structure novel auxetic metamaterial replaceable energy dissipation metal damper comprises a fixing seat, through the fixing seat, plate-shaped auxetic supporting and columnar double-deformation mechanism novel auxetic metamaterial double structures are used for energy dissipation at the same time, so that the anti-seismic function is achieved; the building can be dynamically protected under the earthquake vibration impact effect; the modular replaceable energy consumption core body design is adopted, and quick disassembly and replacement of damaged components are achieved through the assembly type design; meanwhile, a self-adaptive displacement compensation structure is combined, and the stability of the main body structure is maintained in the continuous energy consumption process; according to the device, the anti-seismic reliability of a building structure in the whole life cycle is remarkably improved, the later operation cost is reduced through the maintenance-friendly design, and all-around performance optimization from earthquake protection to daily maintenance is achieved.

The invention discloses a motor coil winding device and method, and belongs to the technical field of motor manufacturing, the motor coil winding device comprises a winding machine body, the upper surface of the winding machine body is fixedly connected with a pair of supporting plates, and the outer surfaces of the supporting plates are provided with self-adaptive floating wire protection assemblies; a wire dynamic regulation and control assembly is installed on the upper surface of the winding machine body, a fixing piece is installed on the upper surface of the winding machine body, and a winding displacement quality sensing assembly is installed on the portion, close to the fixing piece, of the upper surface of the winding machine body. The magnetorheological fluid in the magnetorheological fluid damper rapidly changes the rheological property under the action of a real-time control magnetic field, vibration transmission is effectively restrained, the phenomenon that a wire is broken due to too large tension is avoided, when it is monitored that the tension is too small, the magnetic powder brake increases the resisting moment and slows down the rotating speed of the pay-off reel to improve the tension, and if the tension is too large, the magnetic powder brake stops working. The magnetic powder brake reduces the resistance moment and accelerates the pay-off, and ensures that the wire is always at the optimal traction angle.

The utility model discloses a novel channel expanding device for a single-side double-channel spine endoscopic surgery, and relates to the technical field of medical equipment. The pressurizing plates are mounted on the two sides of the holding part and are symmetrically distributed; the beneficial effects of the utility model are that: be equipped with holding piece, pressurizing plate, delivery ball bin, delivery box and elastic bandage, when in use, the pressurizing plate is used for the pressure operation, the delivery box supplements the required dilation auxiliary solution, the limit bandage carries out the limit installation of first dilation plate, second dilation plate and holding piece, and the use is convenient. Double buffering protection treatment is carried out when the holding piece is pressurized through the damping shock absorber and the spring, the service life of the equipment is prolonged, the equipment is convenient to carry through the elastic binding band, the overall structure is simple and easy to operate, the use requirement is met, and the practicability is high. And normal expansion, convenient carrying and multi-stage buffer protection treatment functions are integrated when the equipment is used, so that the overall use flexibility is improved.

An exercise system for pull up exercises can include a bar, a first block, a first support bracket, and a first u-shaped pocket member. The bar can have a first bar end and a second bar end. The first block can be coupled to the first bar end, and the first block can contain a shock absorbing non-metal material. The first u-shaped pocket member can protrude from the first support bracket. The first u-shaped pocket member can be configured to at least partially mate with the first block such that when the first block slidably fits into the first u-shaped pocket member, the first block is restricted from rotating within the first u-shaped pocket member.

An impact wrench (10) including a rotary impact drive (22), wherein the rotary impact drive (22) has a drive shaft (28) running along a longitudinal axis (L), wherein the rotary impact drive (22) has a striker (30) arranged so as to be movable along the longitudinal axis (L), and an anvil head (32) which can be contacted by the striker (30) in a circumferential direction (U) relative to the longitudinal axis (L). The rotary impact drive (22) has at least one impact damper (40, 42, 44) which is configured to damp an impact of the striker (30) in a longitudinal impact direction (LR) parallel to the longitudinal axis (L), in particular on the anvil head (32). Thus undesired vibrations can be reduced or prevented, so that health risks associated with use of the impact wrench (10) can be reduced.

The invention relates to the technical field of vehicle control, in particular to a damping attenuation compensation method and device for a basic valve system of a continuous damping adjustable shock absorber, and the method comprises the steps: collecting the current mileage of a target vehicle, so as to determine whether the target vehicle carries out the self-inspection of the continuous damping adjustable shock absorber or not; under the condition that it is determined that self-inspection of the continuous damping adjustable shock absorber is conducted, the convergence time of a target vehicle passing through a preset deceleration ridge at different vehicle speeds is obtained; correcting a damping curve of the continuous damping adjustable controller of the target vehicle according to the convergence time at different vehicle speeds to obtain a target current of the continuous damping adjustable valve, comparing the target current with a current actual current of the continuous damping adjustable valve of the target vehicle to obtain a current deviation value, and outputting the current deviation value. And performing damping compensation on the continuous damping adjustable valve according to the current deviation value. Therefore, the problems that the damping force of the basic valve system is continuously attenuated along with the increase of the driving mileage of the vehicle, and stable driving and comfort of the vehicle are ensured by conventional control software are solved.

The invention provides a photovoltaic module support amplitude stabilizing device, which relates to the technical field of photovoltaic equipment and comprises a support amplitude stabilizing execution module, a data acquisition module, a windproof control type determination module and a windproof control module. By constructing a three-level windproof control strategy system, accurate response to different wind levels is achieved, a first-level windproof control strategy is adapted to the vibration frequency and amplitude of a support in real time by dynamically adjusting the damping coefficient of a damping shock absorber, and a second-level windproof control strategy is adapted to the length of a windproof hydraulic cylinder based on wind speed and wind direction data. According to the three-level windproof control strategy, when strong wind exceeds a mechanical counteracting range, the dip angle of the photovoltaic panel is adjusted to a safe and efficient conversion angle, the wind resistance and the light energy utilization rate of the structure are balanced, and the wind energy utilization rate of the photovoltaic panel is increased. And the reliability and the economical efficiency of the photovoltaic system under the severe weather condition are improved.

The utility model relates to the technical field of vibration damping devices, in particular to a wind driven generator tower tuning inerter vibration damping device which comprises a sliding support, the sliding support is mounted on a rest platform, and a mass block is slidably arranged on the sliding support in the horizontal direction; the counter-force frame assembly is fixedly connected to the rest platform, and an adjustable spring assembly and a liquid inerter damper assembly are connected between the counter-force frame assembly and the mass block; wherein the adjustable spring assembly and the liquid inerter damper assembly can rotate in the horizontal direction relative to the mass block and the reaction frame assembly, the adjustable spring assembly is used for buffering movement of the mass block in the horizontal direction, and the liquid inerter damper assembly is used for absorbing vibration of the mass block. According to the device, the damping effect of the device is improved through the amplification effect of inertial damping, the damping device can achieve balance of strong vibration energy with the small mass size, all the components of the device are supported to be disassembled and assembled, and installation and transportation are convenient.

The invention discloses an elastic support integrated bearing and squeeze film damper integrated structure with outer ring radial holes. The elastic support integrated bearing and squeeze film damper integrated structure comprises an elastic support integrated outer ring, a bearing inner ring, a retainer, a rolling body, a squeeze film damper, a bearing seat and the like. The elastic support integrated outer ring adopts the integrated design of a squirrel-cage type elastic support and the bearing outer ring, the radial size is reduced, the centering precision is improved, and an oil storage groove and a radial oil hole are formed in the outer side wall of the bearing outer ring of the integrated structure; the extrusion oil film damper is located on the outer side of the elastic support integrated bearing, and an oil film is communicated with a radial oil hole in the bearing outer ring, so that bearing lubrication and the extrusion oil film damper share a lubricating oil path; radial lubricating oil lubrication of the bearing is achieved through the arrangement of the radial oil holes, and the situation that the bearing is damaged due to lack of oil lubrication under the extreme working condition is avoided; meanwhile, the oil storage grooves and the radial oil holes can effectively promote flowing of lubricating oil in an oil film, formation of a dead cavity of the squeeze oil film damper is avoided, and the vibration reduction effect of the squeeze oil film damper is enhanced.

A portable folding wagon includes wheel components, four damping elements, a foldable load-bearing bottom frame, a foldable main frame, a telescopic handle assembly and a cloth basket. The wheel components include two fixed wheels arranged at a rear part of the portable folding wagon and two universal wheels arranged at a front part of the portable folding wagon. The foldable load-bearing bottom frame includes two lower rear connectors, two lower front connectors and an X-shaped folding load-bearing frame. The fixed wheels are arranged below the lower rear connectors through the damping elements, and the universal wheels are arranged below the lower front connectors through the damping elements. The damping elements include one or more of damping springs, cylinder dampers or variable damping force shock absorbers.

The invention discloses high-efficiency motor iron core laminating equipment which comprises a base, a support fixedly mounted at the top of the base, a top plate fixedly mounted at the top of the support, an air cylinder mounted at the top of the top plate, a punch structure mounted on an output shaft of the air cylinder, and a stepping motor mounted in the center of the inner wall of the base. A rotating shaft is mounted on an output shaft of the stepping motor, and the rotating shaft and the base are rotationally mounted through a bearing; and the stamping disc is rotationally installed at the top of the base, a groove is formed in the bottom of the stamping disc, and the inner wall of the groove and the top of the rotating shaft are fixedly installed. According to the device, through three core technologies of electromagnetic-mechanical composite driving, a multi-stage buffer structure and precise rotation positioning, the positioning repetition precision, the controllable damping characteristic of the magnetorheological fluid damper and closed-loop control formed by a pressure sensing feedback system, the lamination quality consistency is remarkably improved, electromagnetic limiting and electromagnetic stripping of a motor iron core are facilitated, and the production efficiency is improved. The use effect is good and the efficiency is high.

The invention belongs to the technical field of automobile vibration reduction, and provides a frequency-division double-closed-loop control method, system, medium and equipment for a vibration absorber, and the method comprises the steps that the vehicle body state of a vehicle is monitored in real time, and the vibration reduction state of the vehicle is determined based on the vehicle body state; if the vehicle is not in the vibration reduction state, a correction strategy is executed; dynamically capturing full-band vibration of the vehicle based on the correction strategy, obtaining a time domain signal and converting the time domain signal into a frequency domain signal; the frequency domain signal is processed, the current vibration type of the vehicle is determined, and a vibration reduction strategy corresponding to the current vibration type is determined based on the current vibration type; and the release current and the magnetorheological fluid state of the vehicle are regulated and controlled based on the vibration reduction strategy, and vibration reduction of the vehicle is completed. According to the invention, on the basis of effectively eliminating vibration invalid signals and eliminating interference energy, the limitation of low-frequency and high-frequency vibration dual suppression is reduced, broadband coverage is realized, the control precision is high, and the vibration reduction effect is good.

The invention relates to the technical field of elevator buffers, in particular to a spring damping device for an elevator buffer, which comprises a vertically arranged damping shock absorber, the top of the damping shock absorber is connected with a movable plate, a main buffer spring is connected between the movable plate and the damping shock absorber, and the movable plate is movably connected with a driving plate. The lower portion of the driving plate is connected with a movable pin assembly extruding towards one side of the movable plate, the lower surface of the movable pin assembly is connected with an impact transmission assembly, and the lower portion of the damping shock absorber is connected with a standby buffering unit. A main buffer spring and a standby buffer unit are arranged, under the normal condition, the main buffer spring absorbs impact energy, and the elevator falling speed is reduced; when the main buffer spring is broken, the movable pin assembly drives the impact transmission assembly to be connected with the standby buffer unit in a clamped mode, the standby buffer unit is started to work, a lift car or a counterweight is prevented from directly impacting the bottom of a hoistway, and double guarantees are provided for safety of passengers and equipment.

The invention belongs to the technical field of dampers, and particularly provides a shock-absorbing damper for a high-rise building, which comprises supports fixedly mounted on an upper boss and a lower boss, a damper body is hinged between the two supports, a spiral pipe is arranged on the outer side of the damper body, one support is connected with a sleeve, and the other support is connected with a spring. An air outlet one-way valve and an air inlet one-way valve are arranged on the sleeve, the air outlet one-way valve is connected with a pressurizing box through a hose, a conveying pipe is arranged in the pressurizing box, and the conveying pipe is communicated with an inlet of the spiral pipe through a hose. In the reciprocating motion process of the damper body, the sleeve and the inflating piston rod are matched to pressurize the pressurizing box, cooling liquid in the pressurizing box is pressed into the spiral pipe, heat of the damper body is taken away, the temperature of the damper body is kept within a proper range, and the situation that the energy dissipation capacity of the damper body is affected by too high temperature is avoided; the problem that in the prior art, the energy dissipation capacity of a damper is weakened due to high temperature is solved.

The invention provides a novel shock absorber which comprises a top plate, a bottom plate, a main shock absorption device and a complete machine horizontal shock absorption adjusting mechanism, the complete machine horizontal shock absorption adjusting mechanism is arranged around the main shock absorption device, and the complete machine horizontal shock absorption adjusting mechanism comprises a tension spring fixing block, a shock absorption adjusting tension spring and a shock absorption adjusting fixing block. The tension spring fixing block is located on the side, close to the bottom plate, of the top plate and fixedly connected with the top plate, the vibration reduction adjusting fixing block is perpendicular to the bottom plate and fixed to the vertex angle position of the bottom plate, one end of the vibration reduction adjusting tension spring is fixedly connected with the tension spring fixing block, and the other end of the vibration reduction adjusting tension spring is connected with the vibration reduction adjusting fixing block through the vibration reduction steel wire. According to the shock absorber, the complete machine horizontal shock absorption adjusting mechanism which is arranged around the spring shock absorption assembly and fixedly connected with the top plate is additionally arranged, the deviation problem of the shock absorber is adjusted through the shock absorption adjusting tension spring and the shock absorption steel wire, and adjustment is easy and convenient to achieve.

The invention discloses an automatic guider assembly line and an automatic guider assembly method, and relates to the field of manufacturing of automobile shock absorbers, and the automatic guider assembly line is characterized by comprising a first material machine and a second material machine which are separated from each other, and a butt joint conveying belt for connecting the first material machine and the second material machine. The first material machine is provided with an assembly rotating disc used for sequentially stacking parts such as an oil scraper ring and a valve block to form a small assembly, and a small assembly detection station and a small assembly NG discharging station are arranged before the small assembly is installed into a guider bare part. And the second material machine is used for performing bushing press fitting and final detection on the semi-finished products conveyed from the first material machine. Precise assembly and high-force press-fitting procedures are separated, so that the problem of process interference is effectively solved, and the assembly stability and the product quality are improved; meanwhile, the middle quality doors are arranged on the sub-assembly levels, so that unqualified products can be removed in advance, the cost superposition type waste is fundamentally avoided, and the production efficiency and the economic benefits are remarkably improved.

A shock absorber assembly (10, 10′, 10″) for a personal protective equipment and a deformable element (10a, 10a′, 10a″) for such a shock absorber assembly (10, 10′, 10″). The shock absorber assembly (10, 10′, 10″) comprises a deformable element; (10a, 10a′, 10a″) exhibiting a mechanical resistance against deformation and a flexible strap (16, 17) comprising a middle portion (16b) and two free end portions (16a) facing away from each other. The middle portion (16b) is tightly wrapped around the deformable element (10a, 10a′, 10a″) such that pulling the free end portions (16a) away from each other deforms the deformable element (10a, 10a′, 10a″). A protective helmet (100), a welding helmet (200), a face shield (400) or a respiratory device (300) comprising a hard shell (110, 210, 310, 410) and a shock absorber assembly (10, 10′, 10″) according to the present disclosure, wherein the hard shell (110, 210, 310, 410) of the protective helmet (100) comprises attachment means (130) for connecting the strap (16, 17) of the shock absorber assembly (10, 10′, 10″) to the hard shell (110, 210, 310, 410).

The invention relates to the technical field of vibration damping devices, in particular to a rocket body transport vehicle vibration damping device which comprises a base, a first vibration damper and a second vibration damper. The base is fixed to the upper side of the suspension, one end of the first shock absorber is fixedly connected with the middle of the base, and the other end of the first shock absorber is fixedly connected with a frame. Mounting grooves are formed in the side face, close to the frame, of the base and located on the two sides of the first shock absorber, the second shock absorbers are arranged in the mounting grooves, and the shock absorption ends of the second shock absorbers are connected with the shock absorption end of the first shock absorber. In the working process, the overall vibration reduction effect of the semitrailer can be improved.

The invention discloses a modularized replaceable self-resetting energy consumption type bridge pier anti-collision system, and belongs to the technical field of bridge engineering structure safety. The system includes an annular rubber pad, an annularly disposed damper module, and a shape memory alloy (SMA) tow. The damper module comprises a cylinder body, high-viscosity fluid, a reset spring, a piston and a force transmission plate. The cylinder body is fixed to the pier in a surrounding mode through bolts and rubber pads, the inner wall of the cylinder body is connected with the piston through a reset spring, the piston rod end is hinged to the force transmission plates, and the SMA wire bundles are connected with the force transmission plates. When an external impact load acts on the force transmission plate, the fluid damper provides viscous energy consumption, and the SMA wire bundle, the spring and the rubber pad provide deformation energy consumption; after the collision is finished, the system can be reset to the initial position under the synergistic effect of the SMA wire bundle, the spring and the rubber pad. By means of the modular design, efficient energy consumption and self-resetting can be achieved; and meanwhile, a single damper can be quickly replaced after being damaged, so that the maintenance efficiency and the system recoverability are greatly improved.