367 results about "Hydraulic shock" patented technology

The invention relates to the field of electromagnetic valves, in particular to a valve body unit, an electromagnetic valve with the valve body unit and an electric control hydraulic shock absorber with the valve body unit. The hydraulic unit comprises a main valve assembly; the valve plate unit is arranged on the main valve assembly; the main valve assembly comprises a main valve shell. An oil channel is arranged on the main valve shell; the valve plate unit comprises a control valve plate; the control valve plate is arranged at the end part of the main valve shell; the control valve plate can deform; after the control valve plate is deformed, a communication channel is formed at the joint of the control valve plate and the main valve shell; through the arrangement of the control valve plate, after the current of the coil unit is cut off, overflow and discharge of hydraulic oil can be achieved through deformation of the control valve plate.

The invention belongs to the technical field of automobile shock absorbers, and particularly relates to a shock absorber assembly structure for an active hydraulic suspension. Liquid in the rod cavity and the energy accumulator can be pumped into the rodless cavity by regulating and controlling the two-way pump to achieve active jacking of the hydraulic shock absorber, liquid in the rodless cavity is pumped into the energy accumulator and the rod cavity to enable the shock absorber to be actively compressed, and then the lifting end of the shock absorber drives a vehicle body to synchronously move to achieve active adjustment of the height of the vehicle body. In addition, a first channel, a second channel, a third channel, a fourth channel, a first electromagnetic one-way damping valve, a second one-way damping valve, a third electromagnetic one-way damping valve and a fourth one-way damping valve are arranged on the base, and the first electromagnetic one-way damping valve, the second one-way damping valve, the third electromagnetic one-way damping valve and the fourth one-way damping valve are used for controlling the oil flow direction and damping force. An oil flow channel and a flow direction of a traditional shock absorber are changed, a plurality of valve bodies are integrally assembled, and assembly of the valve bodies and the shock absorber is facilitated.

The invention belongs to the technical field of automobile shock absorber electromagnetic valves, and particularly relates to a hydraulic shock absorber electromagnetic valve for vehicle testing, which controls whether a liquid inlet hole is directly communicated with a main liquid cavity or not through an elastic valve plate, and controls whether the main liquid cavity is communicated with a liquid outlet hole or not through a pressurizing seat. The pressure of oil entering the liquid inlet must overcome the tension of the elastic valve block, the supporting force of the elastic supporting piece can push the elastic valve block and the pressurizing base to move in the direction away from the main valve body, then the oil can flow back to the shock absorber through the liquid outlet hole, and the resistance borne by the oil in the electromagnetic valve is increased. And large damping force is provided for the vibration damper. By arranging the pressurizing cavity, when the electromagnetic coil is powered on, the pilot valve element blocks the overflow hole, oil in the overflow hole applies pressure to the pressurizing base, the oil does not easily push away the pressurizing base and the elastic valve block in the direction away from the main valve body, and oil resistance is further increased. The electromagnetic valve consumes less electric energy, and the vehicle research and development test efficiency is improved.

The invention relates to a stroke-sectioned adjustable variable-damping inflatable hydraulic multi-damping device, and belongs to the technical field of vibration control. Comprising a roll shaft support assembly, a working cylinder assembly, a spring damping assembly and a piston mechanism assembly. The working cylinder assembly is mainly composed of a connecting pull ring, a main liquid storage cylinder, a limiting device, tightness adjusting threads, a piston rod connecting position, an auxiliary liquid storage cylinder and an air storage cylinder. The spring damping assembly is mainly composed of an adjusting spinning roller, a damping spring, a spinning roller damping gasket and a spring damping gasket. The piston mechanism assembly is composed of a piston rod and driving pistons on the two sides. The roller shaft support assembly is composed of a roller shaft fixing support and a pin. Through mechanism linkage of the liquid storage cylinder and the air storage cylinder, the inflatable hydraulic damping device is formed, and the purposes of damping changing and vibration reduction are achieved. The shock resistance and the transmission efficiency of a vibration reduction system can be improved, the energy consumption effect, the structural rigidity and the stability are enhanced, and the advantages of being simple in structure, convenient to implement and the like are achieved.

The utility model discloses a clutch booster with a hydraulic damping valve, which comprises a clutch booster assembly, the clutch booster assembly comprises a hydraulic cylinder, and the hydraulic cylinder is connected with the hydraulic damping valve which is used for damping hydraulic pressure sudden change or pressure wave crest in the hydraulic cylinder. The hydraulic cylinder is connected with the hydraulic damping valve, hydraulic oil pressure generated in sudden change or pressure wave crests, especially instantly generated by the sudden change or pressure wave crests, is transmitted to the hydraulic damping valve, sudden change pressure change in the hydraulic cavity is balanced through the hydraulic damping valve, and pressure generated after sudden change or wave crests is reduced and directly transmitted to the clutch. The hydraulic pressure in the hydraulic cylinder is stably output, the influence of sudden pressure change (especially increase) and overlarge pressure wave crest generated in the hydraulic cavity on product control hydraulic stability is avoided, and then the influence of unstable product output pressure is avoided.

The invention relates to the technical field of image processing, in particular to a damper valve system adjustment method based on an artificial intelligence technology, a product, equipment and a storage medium. The method comprises the steps that parameter combinations of all valve systems of the shock absorber are collected; performing data quantization on the parameter combination to obtain a feature combination; and inputting the feature combination into a neural network model to obtain a change curve of the damping force along with the piston speed predicted by the neural network. According to the method, the external characteristic functions of the passive hydraulic shock absorber under different valve system structures are predicted through the artificial intelligence algorithm, and the number of tests in the chassis adjustment process is reduced.

The present invention discloses a double-cylinder supercharging structure and a control method. The double-cylinder supercharging structure includes an accumulator, a first supercharging oil cylinder, a second supercharging oil cylinder, a shot sleeve oil cylinder, and an oil tank; the first supercharging oil cylinder and the second supercharging oil cylinder are respectively connected to the shot sleeve oil cylinder; the rodless chambers and the rod chambers of the first supercharging oil cylinder and the second supercharging oil cylinder are interconnected through hydraulic pipelines; the first supercharging oil cylinder and the second supercharging oil cylinder are synchronously controlled through a double-cylinder valve group. The technical solution of the present invention uses two smaller supercharging oil cylinders in parallel to replace a larger supercharging oil cylinder in the prior art, reducing the mass of the supercharging piston and the hydraulic shock during the supercharging action. The two small oil cylinders are synchronously controlled by two oil valves, with a larger flow rate and faster response. It can not only improve the shot sleeve performance and the yield rate of products, but also has a more flexible and compact layout.

The present invention relates to a high-frequency response semi-active shock absorber with adjustable damping, which includes an oil storage cylinder, a working cylinder, a piston rod and a bypass oil passage. A conducting one-way valve is arranged between the working cylinder and the oil storage cylinder, and both ends of the conducting one-way valve are respectively communicated with the lower end of the working cylinder and the inside of the oil storage cylinder. The piston body is provided with a conducting hole and a piston one-way valve for communicating the upper chamber and the lower chamber. The bypass oil passage includes a first branch oil passage, a second branch oil passage and a third branch oil passage which are arranged in parallel. A first switching valve and a first pilot valve are connected in series on the first branch oil passage. A second switching valve is arranged on the second branch oil passage. A first overflow valve is arranged on the third branch oil passage. The purpose of the present invention is to solve or at least alleviate the problem that the traditional passive hydraulic shock absorber cannot be adjusted in real time according to the vehicle load and line conditions, and to provide a high-frequency response semi-active shock absorber with adjustable damping.

The invention discloses a vehicle oil damper and an intelligent monitoring system thereof, and relates to the technical field of vehicle suspension systems, the vehicle oil damper comprises a dustproof sleeve, the dustproof sleeve is made of high-strength steel, the top of the dustproof sleeve is fixedly connected with an upper sealing plate through welding, and a first sealing ring is embedded in the bottom of the upper sealing plate; the surface of the first sealing ring makes contact with the inner wall of the dustproof sleeve, and the bottom of the upper sealing plate is fixedly connected with an airtight ring. According to the invention, by integrating a multi-dimensional sensor network and a data fusion algorithm, real-time, accurate and deep perception and fault diagnosis of the working state and the health state of the shock absorber are realized; according to the intelligent processing unit based on the heterogeneous multi-core architecture, various faults such as nitrogen leakage, sealing failure, oil emulsification and abnormal wear can be warned in advance, and the damping characteristic is compensated through the performance self-adaptive adjustment module, so that the reliability, safety and riding comfort of a suspension system are improved.

The invention belongs to the technical field of automobile shock absorber electromagnetic valves, and particularly relates to a hydraulic shock absorber electromagnetic valve for vehicle testing. A backflow channel communicated with an overflow cavity and a pressurizing cavity is arranged on a partition plate, a one-way valve leading to the pressurizing cavity is arranged on the backflow channel, so that oil flowing into the overflow cavity flows back into the pressurizing cavity to react on a pressurizing seat, and the oil in a main liquid cavity needs to have higher pressure when the pressurizing seat is pushed away from a main valve body; and the oil liquid pressure difference between the liquid inlet and the liquid outlet is further increased, the damping force of the oil liquid in the electromagnetic valve is increased, and the vibration reduction performance of the vibration damper is improved. Compared with an electromagnetic valve of a shock absorber in the prior art, when the power-on amount of the electromagnetic coil is certain, the electromagnetic valve provides larger damping force for the vehicle shock absorber; on the contrary, when the damping force needed by the vehicle shock absorber is fixed, the electromagnetic valve consumes less electric energy, the number of times of vehicle charging in the vehicle driving evaluation test process is reduced, the vehicle research and development test efficiency is improved, and electric energy is saved.

The invention discloses a suspension device and a vehicle. The suspension device comprises a lower supporting arm, an elastic piece, a hydraulic shock absorber, a connecting structure, an anti-tilting structure and an overprotection structure. The elastic piece achieves multi-stage damping through the main spring, the auxiliary spring and the limiting assembly. The hydraulic shock absorber dynamically dissipates vibration energy through oil damping and a speed and pressure adjusting assembly. The connecting structure is connected with the lower support arm and the transmission system through a ball head to ensure movement coordination and power transmission; the anti-inclination structure inhibits side inclination through an anti-inclination rod and an arm rod, and the control stability is improved; the overprotection structure restrains the displacement of the suspension through a limiting belt, and key components are protected. After the electric vehicle adopts the suspension device, the driving smoothness is obviously improved, the vibration transmission is reduced, and the riding comfort is enhanced; the anti-roll performance and the motion coordination of the two sides improve the control accuracy; a part protection mechanism prolongs the service life, and durability and reliability are better; the rollover risk is reduced through safety guarantee under the extreme working condition; the device adapts to various road conditions and is high in universality.

The invention relates to the technical field of fully-mechanized coal mining automation control, and discloses a hydraulic support lifting control method and device based on flow proportion and attitude feedback, and the method comprises the steps that a controller establishes a physical parameter model, and the controller calculates the target flow of a stand column oil cylinder and the target flow of a bottom lifting oil cylinder according to a kinematics coupling model; the controller executes a feedforward and fuzzy PID composite control strategy, the controller generates a feedforward instruction and combines the feedforward instruction with the feedback control quantity to synthesize a final valve control instruction, and the controller drives the electro-hydraulic control valve set to act; the controller monitors the synchronous error of the adjacent hydraulic supports and corrects a final valve control instruction, and the controller monitors the speed matching state and executes attitude priority deviation correction; the controller judges whether lifting is completed or not according to the displacement of the stand column oil cylinder, the displacement of the bottom lifting oil cylinder and the pitch angle of the hydraulic support, and the controller executes valve port smooth closing logic. According to the invention, the track tracking precision and the dynamic response speed of the lifting frame are improved, the action synchronism and the attitude stability are ensured, and hydraulic impact is eliminated.

The utility model discloses a damping single-phase electronic electric energy meter box, which comprises an electric energy meter box module, and the electric energy meter box module comprises a box body frame. The convenient disassembly and assembly module comprises a guide groove formed in the center of the front face of the inner wall of the box body frame, a guide block is slidably arranged in the guide groove, the front face of the guide block is sleeved with a mounting plate, sliding grooves are formed in the two opposite sides of the inner wall of the guide groove, and sliding blocks are fixedly arranged on the upper portions of the two sides of the guide block; the sliding rod extends into the sliding groove and abuts against the lower end; the device further comprises a damping module, the damping module comprises movable grooves symmetrically formed in the ends of the two opposite sides of the inner wall of the box body frame, micro hydraulic dampers are arranged at the rear ends of the inner walls of the movable grooves, one ends of the micro hydraulic dampers are sleeved with movable blocks, and movable plates are fixed to one ends of the multiple movable blocks. The electric energy meter can be conveniently disassembled and assembled at a low position, time and labor are saved, simplicity and convenience are achieved, use is convenient, requirements are met, and the use effect is improved.

The invention discloses a hydraulic shock absorber, a hydraulic suspension system and a vehicle. The hydraulic shock absorber comprises a shock absorber body and a pressure sensor, and a rodless cavity and a rod cavity are formed in the shock absorber body; the pressure sensor is installed on the shock absorber body and communicates with the rodless cavity and / or the rod cavity. Namely, the pressure sensor is integrated on the hydraulic shock absorber, and the pressure sensor is communicated with the rodless cavity and / or the rod cavity, so that the pressure value of oil in the rodless cavity and / or the rod cavity can be detected, and the accuracy of oil pressure detection when the hydraulic shock absorber executes actions can be improved; and conditions are created for subsequent accurate control of the hydraulic shock absorber.

We provide a piston-through hydraulic damping accumulator that absorbs or reduces hydraulic shock in real time, thereby smoothing the pressure in the hydraulic system. [Solution] A piston-through type hydraulic damping accumulator comprising a cylinder block 10 having a hollow cavity, a first hydraulic oil hole and a second hydraulic oil hole provided at both ends of the cylinder block 10, a floating spacer 20 dividing the cylinder block 10 into a damping chamber 1011 and a hydraulic oil chamber 1012 that are sealed and isolated from each other, a communicating member 30 for connecting the first hydraulic oil hole, the second hydraulic oil hole and the hydraulic oil chamber, the communicating member provided inside the cylinder block 10 along the central axis direction of the cylinder block 10, and the floating spacer 20 fitted so as to slide and seal to the outside of the communicating member 30. The accumulator can be installed in series with the hydraulic system to immediately capture and absorb hydraulic shocks in the hydraulic system.

The invention discloses a bearing powder metallurgy device and belongs to the field of powder metallurgy, the bearing powder metallurgy device comprises a base, a supporting shaft is fixedly connected to the middle of the front side and the rear side of the upper surface of the base, a mounting plate and a hydraulic impact module are slidably connected to the outer surface of the supporting shaft, and an upper punch is fixedly connected to the bottom of the hydraulic impact module; the upper surface of the mounting plate is fixedly connected with a template, one side of the template is fixedly connected with a first hydraulic push rod, and the output end of the first hydraulic push rod is fixedly connected with an anti-leakage assembly. When the powder box is reset, a rack is driven to move through transmission, a round block is driven to rotate through a gear, so that a trapezoidal block continuously rotates, a hollow rod is pushed to continuously shake up and down, a net plate and parts are continuously vibrated through transmission, and a large amount of metal powder is prevented from being attached to the surfaces of the parts; and during subsequent sintering, bonding between the parts occurs, hard nodules or protrusions are prevented from being formed on the surfaces of the parts through metal powder, and the metallurgical quality is improved.

The present invention relates to the technical field of logistics transportation, and discloses an efficient handling method for prefabricated cabins, including: Step 1, providing seismic protection for the internal equipment of the prefabricated cabin, and reducing the impact of vibration and shock on the internal equipment through a flexible support system, a full-box seismic structure, and multi-layer protection measures for precision equipment; Step 2, optimizing the transportation vehicle based on the seismic design in Step 1 to ensure the stability and efficiency of the transportation process. Through the flexible support system, the full-box seismic structure, and multi-layer protection measures for precision equipment, the problem that the electrical, HVAC, and communication equipment integrated inside the prefabricated cabin is easily damaged by vibration and shock during transportation is effectively solved. The optimized formulas for spring stiffness and damping coefficient in the seismic design, combined with the honeycomb energy-absorbing structure and hydraulic shock pads, enable the prefabricated cabin to have excellent seismic resistance in complex transportation environments, ensuring the integrity and safety of equipment operation.

The invention discloses a two-stage magnetic coupling hydraulic impact forming device and method. The two-stage magnetic coupling hydraulic impact forming device comprises a forming assembly, a first magnetic coupling assembly, a second magnetic coupling assembly and a control system. The forming assembly comprises a female die, a hydraulic cylinder filled with a liquid medium and a plunger part arranged in a sliding mode. One end of the hydraulic cylinder is in butt joint with the female die and a blank is placed. The first magnetic coupling assembly is arranged at the end, away from the female die, of the hydraulic cylinder and drives the plunger part to push the liquid medium through a coupling magnetic field to apply axial extrusion force to the blank. The second magnetic coupling assembly is arranged at the end, close to the female die, of the hydraulic cylinder and drives the blank to generate controllable radial deformation through a coupling magnetic field. The control system is in communication connection with the two magnetic coupling assemblies to achieve synchronous work. Through the synergistic effect of the axial extrusion force and the radial electromagnetic force, the blank is evenly stressed, excessive reduction of the wall thickness is restrained, the defects of stress concentration, cracking and the like are reduced, and the size precision of a formed part and the yield of finished products are remarkably improved.

The invention provides a stern structure underwater transient impact response calculation method in a steering process. The method comprises the following steps: establishing a kinetic model of an electro-hydraulic steering device based on Adams; the hydrodynamic torque of a rudder shaft of the electro-hydraulic steering device in the steering process, the hydraulic impact load in a hydraulic cylinder and the displacement of a piston rod serve as input of a dynamic model, dynamic analysis of the electro-hydraulic steering device under the steering working condition is conducted, and the impact load at the joint of the electro-hydraulic steering device and the stern structure is obtained; the impact load at the joint is loaded to the stern structure, an acoustic-solid coupling finite element method is adopted for solving, transient impact time-domain response of the stern structure is obtained, and the time-domain characteristic and the frequency-domain characteristic of the transient impact time-domain response are analyzed.

1. Name of the product in this design: Airborne radial hydraulic impact drilling rig. 2. Purpose of this design: for tunnel construction. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention provides a construction method and system for eliminating water seepage points of a pool, and the method comprises the following steps: a drilling step: a percussion drill or a hydraulic percussion drill is adopted to drill the leakage points of the side wall of the pool, and the drilling depth is not less than two thirds of the thickness of the side wall of the pool; cleaning and mounting: washing and cleaning the drilled hole; high-pressure glue injection is conducted, specifically, high-pressure glue injection equipment is connected to the top of the expansion screw, and waterproof glue is injected into the expansion screw through high pressure; cutting: after the waterproof glue in the expansion screw is completely dried, cutting the expansion screw by adopting an angle grinder, so that the expansion screw is flush with the surface of the side wall of the pool; and an anti-corrosion treatment step: carrying out anti-corrosion treatment on the exposed expansion screw. According to the method, the leakage points on the side wall of the pool can be accurately treated, and the waterproof glue can fully fill water seepage gaps under the high pressure effect, so that the leakage points are effectively blocked, the waterproof performance of the pool is greatly improved, and reworking caused by improper treatment of the leakage points in the pool construction process is avoided.

Rock drilling machine (10) comprising a hydraulic percussion unit (11) including a percussion piston (12) for providing percussive impulses to a shank adapter (13) of the rock drilling machine (10) in a forward direction (Dfwd), the shank adapter (13) being configured to be connected to a drill string (6) during operation. A hydraulic damper unit (14) is arranged for damping the recoil movement of the shank adapter (13) in the backward direction (Drev), and a hydraulic extractor unit (16) is arranged for actuating the shank adapter (13) in the backward direction (Drev). The rock drilling machine comprises an inlet coupling (Cp) for connection to a pressure source (P) of pressurised hydraulic fluid and an outlet coupling (CT) for connection to a tank (T) for non-pressurised hydraulic fluid. Further, the inlet coupling (Cr) is connectable to both the hydraulic damper unit (14) and the hydraulic extractor unit (16). The disclosure also relates to a drill rig comprising such a rock drilling machine. (FIG. 4)

The invention relates to the field of electromagnetic valves, in particular to a pilot valve assembly, a valve body unit with the pilot valve assembly, an electromagnetic valve and an electric control hydraulic shock absorber. The pilot valve element comprises a valve element body, and an abutting protrusion used for being matched with the front magnetic pole in an abutting mode is arranged on the valve element body. Through optimization of the structure of the pilot valve element, the sealing protrusion is formed on the pilot valve element, namely, through arrangement of the abutting sealing face, the sealing effect between the pilot valve element and the front magnetic pole can be guaranteed, and meanwhile the situation that the sealing performance between the pilot valve element and the front magnetic pole is prone to being affected by machining and assembling quality can be avoided or reduced.

The utility model belongs to the technical field of automobile suspensions, and particularly relates to an air spring shock absorber assembly structure. According to the hydraulic shock absorber, a buffer column is arranged at the bottom of a lower cavity, and a buffer sleeve synchronously and axially reciprocates along with a piston is arranged on the piston, so that the buffer column enters and exits from an inner cavity of the buffer sleeve; when the buffer column blocks the lower end opening of the buffer sleeve, an annular cavity is defined by the outer wall of the buffer sleeve, the side wall of the buffer column and the side wall of the lower cavity, oil in the annular cavity enters the upper cavity through the throttling pipeline and the first throttling channel, the throttling pipeline limits the flow of the oil entering the upper cavity, the downward pressing damping force of a piston is increased, and the damping performance of the damper is improved. And when the buffer column shields the inner port of the throttling pipeline, the flow of the throttling pipeline is limited, the downward pressing damping force of the piston is increased again, and the damping performance of the damper is further improved. The air spring shock absorber assembly structure adopts the shock absorber, the structure is simple, the space of an air chamber of the air spring and the installation space needed by the air spring are reduced, and installation is convenient.

The utility model relates to the technical field of squeezing device discloses a squeezing device, the top of bottom support frame is fixedly connected with vertical rod, the top of vertical rod is fixedly connected with bearing top board, the top of bearing top board is fixedly connected with installation card frame, the inside joint of installation card frame has the hydraulic cylinder, the output fixedly connected with squeezing round plate of hydraulic cylinder. The utility model discloses the sliding connection design of setting up mobile sliding rail and moving wheel, makes squeezing sleeve freely in and out along the sliding rail, and the convenient loading, unloading and cleaning operation, the further promotion equipment stability of symmetrical distribution's sliding rail, prevents the inclination or the jamming of partial load, through setting up the screw thread cooperation of limiting rotation plate and limiting screw rod, can be through the axial fixed of rotating adjustment to squeezing sleeve, ensures the sleeve position stability in the squeezing process, avoids the displacement of hydraulic impact, and the balanced stress of symmetrical distribution's limiting component, prolongs the equipment life.

A groove (2) is axially formed in the inner wall of a barrel body base body (1), and when a piston valve system (3) moves to a groove area, a hydraulic oil medium of the shock absorber and the groove form a bypass oil way through a radial gap of a piston sealing ring. The groove is formed in the middle section of a piston stroke and the tail section of a compression or stretching stroke; the cross section of the groove is rectangular, semicircular, V-shaped or trapezoidal; the depth of the groove is 0.5-2 mm, and the width of the groove is The adjustment of the damping characteristic of the shock absorber can avoid the design change of a piston valve system, and the specific damping characteristic is flexibly realized; the damping force is effectively reduced under the low-speed and small-amplitude vibration working condition, and the riding comfort of an automobile is improved; under the working condition of high-speed large-amplitude vibration, the damping force of the shock absorber is maintained or enhanced, and the operation stability of an automobile is ensured. The invention is suitable for a single-cylinder or double-cylinder hydraulic shock absorber and a passive suspension system, and is compatible with an electromagnetic valve active control system.

The invention relates to the technical field of water level and flow velocity measurement, and discloses a water level and flow velocity measuring mechanism which comprises a detection barrel, a first coil arranged on the upper side of the inner side wall of the detection barrel, a second coil arranged on the lower side of the inner side wall of the detection barrel, and an electrode probe arranged on the rear side of the inner side wall of the detection barrel. The inner side wall of the detection barrel is fixedly connected with a sound wave emitter and a sound wave receiver, the lower surface of the detection barrel is fixedly connected with a first steady flow wing plate, the inner side wall of the first steady flow wing plate is provided with an ultrasonic water level gauge probe, and the outer surface of the detection barrel is provided with a driving module; the upper surface of the detection barrel is fixedly connected with an anti-interference module through a connecting seat, and the measurement mechanism forms an integrated solution of'accurate measurement-interference resistance-convenient movement 'through a composite measurement technology of electromagnetic induction and acoustic Doppler in combination with a hydraulic damping and ball head floating structure and an infrared induction anti-winding driving system.

The utility model relates to the technical field of vehicle suspension shock absorbers, and discloses a variable rigidity oil pressure shock absorber which comprises a shock absorber body, a displacement sensor and a damping assembly, the shock absorber body comprises an outer cylinder, an inner cylinder, a piston rod, a first one-way valve and a second one-way valve, and an oil storage cavity is formed between the outer cylinder and the inner cylinder; the first end of the piston rod penetrates through the outer cylinder, extends into the inner cylinder, is in sliding contact with the inner wall of the cavity and divides the cavity of the inner cylinder into a rod cavity and a rodless cavity, and the second end of the piston rod is used for being connected with an external mechanism; the first one-way valve is used for communicating the rod cavity with the rodless cavity; the second one-way valve is used for communicating the rodless cavity with the oil storage cavity, and the second one-way valve and the first one-way valve are oppositely arranged; the damping assembly comprises a damping pipeline, a switch electromagnetic valve and a damping adjusting unit. The piston rod can be switched between a slidable state and a non-slidable state through the on-off electromagnetic valve, so that shaking of a vehicle body is reduced when the vehicle passes through a limited boundary area, and interference with facilities is avoided.

The purpose of the present invention is to appropriately generate a damping force at the start of compression after a piston rod is completely elongated while alleviating shock when the piston rod is completely elongated with a simple structure. A hydraulic shock absorber (10) is provided with: a rod guide (21) that guides a piston rod (11) so that the piston rod (11), which advances and retreats in an oil chamber (14) in a cylinder (12), can slide freely, and that forms a rebound oil chamber (20) that generates a damping force when the piston rod (11) is fully extended; a rebound stopper (19) fixed to the piston rod (11); and a springback valve (23) that enters the springback oil chamber (20) when the piston rod (11) is fully extended. The spring-back valve (23) is mounted to the spring-back stopper (19) so as to be inching in the axial direction (D) of the piston rod (11), and includes a first flow path (P1) of oil for releasing the pressure of the spring-back oil chamber (20) at the start of compression after the piston rod (11) is completely elongated.

A hydraulic shock absorber top rubber is in an annular shape on the whole, a connecting plate protruding outwards is arranged on the outer periphery of the annular shape, the whole structure comprises a second vulcanized body on the outermost side, a first vulcanized body surrounded by the second vulcanized body, a flow channel body, an outer sleeve and a cover plate, and the first vulcanized body and the flow channel body are pressed in the outer sleeve to form a whole after being assembled. The cover plate is located on the upper portion of the assembled whole, the outer side face of the first vulcanized body is of a lying-down E-shaped structure, the runner body is assembled on the outer periphery of the first vulcanized body to define an upper cavity and a lower cavity which are independent, and a runner communicating the upper cavity with the lower cavity is arranged on the outer periphery of the runner body. The damping device is simple in structure, and the axial damping effect is achieved. The first vulcanized body and the runner body are pressed into a whole through the outer sleeve inside, the upper portion is fixed and limited through the cover plate, the whole is surrounded by the first vulcanized body on the outermost layer, the stability of the whole top rubber structure is guaranteed, and large axial and radial rigidity is achieved.