632 results about "Hydraulic shock" patented technology

The invention discloses an LMES suspension system, belongs to the field of vehicle suspensions, and aims to improve the adjustment performance of the suspensions. Comprising a hydraulic shock absorber, a spring, a linear motor and a controller. The hydraulic shock absorber comprises a piston rod and an outer barrel structure which is arranged outside the piston rod in a sleeving mode and is vertically and movably matched with the piston rod. The linear motor comprises a stator and a rotor, and the stator and the rotor are movably matched in the vertical direction. Stators of the linear motors are connected with piston rods of the hydraulic shock absorbers, and the top ends of the piston rods are connected to an upper support of the vehicle body; a rotor of the linear motor is connected with an external cylinder structure of the hydraulic shock absorber, and the bottom end of the external cylinder structure is connected to a lower support used for being installed on a wheel. And the spring is arranged between the rotor of the linear motor and the upper support. The output force of the linear motor and the damping force of the hydraulic shock absorber are overlapped to form the output force of the suspension system, compared with a traditional suspension system, the adjusting performance of the suspension system is greatly improved, and the comfort performance of a vehicle is improved.

The invention belongs to the technical field of automobile accessories, and particularly relates to an automobile hydraulic shock absorber which is characterized in that an oil passing hole channel is designed in a piston rod, and when an automobile runs normally and the automobile hydraulic shock absorber works, oil liquid can smoothly penetrate through the oil passing hole channel and enters a second throttling hole in a built-in bypass piston, so that the oil liquid flows through the oil passing hole channel; when the stroke of the piston rod in the automobile hydraulic shock absorber reaches the limit due to the fact that the automobile faces the limit working condition, the built-in bypass needle can accurately penetrate into the oil passing hole channel in the upper end of the piston rod to effectively block the oil passing hole channel, at the moment, circulation of oil in the piston cylinder is forcibly changed, the damping force is increased, and the damping effect is improved. By means of the design, excessive compression of the automobile hydraulic shock absorber can be effectively limited, the automobile hydraulic shock absorber is prevented from exceeding the safety range, the internal structure of the shock absorber and an overall suspension system of an automobile are protected against damage, and meanwhile it is guaranteed that the automobile can still keep stable control performance under the extreme condition.

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 invention relates to the technical field of hydraulic valves, and discloses a high-water-base large-flow digital proportional valve which comprises a valve seat unit. By adjusting the pressure of the control cavity K1 and the pressure of the control cavity K2, a certain pressure difference is formed between high-water-base hydraulic media in the control cavity K1 and the control cavity K2, so that the high-water-base hydraulic media can push a low-pressure side pushing check ring or a high-pressure side pushing check ring to move, the low-pressure side pushing check ring or the high-pressure side pushing check ring can drive a push rod to move, and the low-pressure side pushing check ring or the high-pressure side pushing check ring can push the high-pressure side pushing check ring to move. Therefore, the high-pressure side cone valve element or the low-pressure side cone valve element can be driven to move synchronously, when the high-pressure side cone valve element moves, the high-pressure side cone valve element can be matched with a reset spring to press the low-pressure side cone valve element, and when the low-pressure side cone valve element moves, the low-pressure side cone valve element can be matched with the reset spring to press the high-pressure side cone valve element. Due to the fact that the push rod is in separated drive with the high-pressure side cone valve element and the low-pressure side cone valve element, the three-position three-way O-shaped full-proportion control valve with the meso-position function is achieved, accuracy of flow control is guaranteed, and hydraulic impact is avoided.

The invention discloses a power transmission line anti-galloping phase-to-phase spacing device, which belongs to the technical field of power transmission lines, and is characterized in that two connecting plates, two connectors, two cross universal joints and two rod type composite insulators are arranged between two adjacent six-split damping spacers; each connecting plate is connected with a cross universal joint through a connector, and the cross universal joints are further connected with the ends of the rod type composite insulators. A hydraulic shock absorber is arranged in the middle of the two rod type composite insulators; a damping ball is arranged in the center of a triangle formed by the rod type composite insulators; an outer viscous damper, a first connecting rod and a second connecting rod are arranged between the hydraulic shock absorber and the damping ball; the first connecting rod and the second connecting rod are connected to the two sides of the outer viscous damper respectively, the damping ball is connected with the first connecting rod, and the hydraulic shock absorber is connected with the second connecting rod through the connecting ferrule. The problems that in the prior art, under the long-time line use condition, wires are damaged, the safety of a power transmission line is affected, and cost is high are solved.

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 invention relates to the technical field of rock drilling equipment installation, in particular to an installation method for a rock sinking ship, which is characterized in that a track, a chassis, a walking mechanism, a winch, a retractable bracket, a two-layer platform and other structures belonging to a walking trolley are separately hoisted, so that the hoisting weight is light, the size is small, and the hoisting is easier and safer; and a stable and balanced installation foundation is provided for later installation through first installation, installation is more efficient and safer, the overturning problem can be avoided, the hydraulic impact rock drilling hammer is installed in the guide rod frame in advance and integrally hoisted, and the problem that the hydraulic impact rock drilling hammer is difficult to install after the guide rod frame is installed is solved. According to the invention, the rock sinking ship with large weight and complex structure can be installed more simply, orderly, efficiently and safely.

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 relates to a hydraulic shock absorber, a suspension system and a vehicle, the hydraulic shock absorber comprises an inner cylinder, the inner cylinder is provided with a piston rod, the space between the inner cylinder and the piston rod is filled with hydraulic oil, the outer wall of one end of the inner cylinder is coaxially sleeved with a first outer cylinder, and a first cavity is formed between the inner cylinder and the first outer cylinder; the piston rod penetrates out of the first outer cylinder, the outer wall of the other end of the inner cylinder is coaxially sleeved with a second outer cylinder, and a second cavity is formed between the inner cylinder and the second outer cylinder; the oil guide and heat dissipation assembly is communicated with the first chamber and the second chamber; the three-way valve is installed in the second cavity, an oil inlet and an oil outlet of the three-way valve are communicated with the inner barrel, a one-way oil outlet of the three-way valve is communicated with the second cavity, and a one-way oil inlet of the three-way valve is communicated with the first cavity through an oil conveying pipeline. The hydraulic oil dissipates heat to the external environment in the flowing process, and the hydraulic oil is prevented from losing efficacy due to high temperature.

A front fork includes a first tube body having an oil flowing therein, a second tube body provided inside the first tube body, the second tube body having the oil flowing therein, and having the oil flowing in an oil passage formed between the first tube body and the second tube body, a partition member provided in the second tube body and partitioning one end of an oil chamber, a rod extending along an axis of the second tube body through the partition member and being configured to move relative to the partition member, an outer periphery of the rod having a dimple portion recessed toward a center of the rod, and a piston provided at a distal end of the rod and allowing the oil to pass, wherein a boundary between an outer peripheral surface of the rod and the dimple portion is formed by a curved surface.

The invention relates to the field of hydraulic hoists, and discloses a hydraulic hoist for hoisting, dismounting and mounting coal mine equipment, which comprises a hydraulic hoist body and a hydraulic motor for driving the hydraulic hoist body, and the hydraulic motor is connected with a hydraulic buffer to protect the hydraulic motor at the moment of unloading of the hydraulic hoist body. The hydraulic buffer comprises a shell, a first elastic pressure relief mechanism, a top impact mechanism and a second elastic pressure relief mechanism, and has the beneficial effects that the whole pressure relief process can be rapidly completed, most hydraulic oil can be contained through a first channel and a second channel, most impact pressure in a system is absorbed, and the service life of the system is prolonged. And the influence of hydraulic impact on the hydraulic motor and the whole hydraulic system is prevented.

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 AGV robot comprises a chassis, the left outer wall and the right outer wall of the chassis are each provided with a notch part, a hydraulic damping structure is installed in each notch part, a flat plate is installed at the movable end of each hydraulic damping structure, and a steering adjustable electric walking module is installed at the bottom end of each flat plate; the hydraulic damping structure allows the flat plate and the steering adjustable electric walking module to obliquely swing up and down relative to the chassis. The direction and speed of each steering module can be independently adjusted, more reliable and accurate motion control can be provided in an application scene needing high-precision positioning and path planning, and meanwhile, the motion control can be achieved on the high-speed running ground or the uneven ground. The steering adjustable type electric walking module can better absorb and reduce vibration caused by road surface driving through a hydraulic damping structure, and therefore the stability of the AGV is improved.

The invention discloses a dock folding mechanism hydraulic flow channel structure optimization method and device and computer equipment. The dock folding mechanism hydraulic flow channel structure optimization method comprises the steps that optimization design is conducted on the shape of a hydraulic flow channel structure; performing three-dimensional flow field simulation analysis by adopting a fluid simulation module, and calculating a total pressure loss coefficient and wall surface pressure intensity; the curve transition design is further optimized; importing the further optimized hydraulic runner structure into a structure analysis module, performing response simulation analysis, and extracting the acceleration of a response point; obtaining an acceleration frequency response curve of the hydraulic flow channel structure according to the response point acceleration and the frequency response function extracted in the response simulation analysis; a buffer structure is designed at an impact generation position according to vibration load characteristics. On the basis of fluid simulation analysis, structural harmonic response analysis, finite element simulation, CFD topological optimization and the like, in combination with simulation analysis and based on an additive manufacturing technology, hydraulic impact is reduced by optimizing the shape of a flow channel in a shell and filling a specially-designed lattice structure, and buffering and vibration absorbing design is achieved.

The invention belongs to the technical field of automobile suspensions, and particularly relates to a hydraulic shock absorber and 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 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 unmanned vehicle anti-collision chassis structure comprises an anti-collision assembly, a chassis body is arranged at the upper end of the anti-collision assembly, the anti-collision assembly comprises a mounting frame fixed to the bottom end of the chassis body, a protection plate is arranged at the bottom end of the mounting frame, and an adjusting assembly is arranged in the mounting frame. Second fixing bases are fixedly connected to the two sides of the top end of the protection plate, a plurality of hydraulic shock absorbers are arranged between the adjusting assembly and the second fixing bases, and a plurality of limiting buffering assemblies are arranged between the top end of the protection plate and the mounting frame. According to the anti-collision chassis, the protection plate, the hydraulic shock absorbers and the limiting and buffering assemblies are arranged, so that the buffering and shock absorption protection effects can be achieved when the chassis body is impacted, the height of the protection plate can be adjusted through the adjusting assemblies, and the lifting stroke and the buffering and shock absorption effects of the protection plate can be changed; and different chassis main body heights can be adapted.

The utility model belongs to the technical field of shock absorbers, and particularly relates to a double-barrel double-piston barrel type hydraulic shock absorber which comprises an outer piston cylinder, an inner piston cylinder, piston rods and an adjusting assembly, the inner piston cylinder extends into the outer piston cylinder and is provided with a first piston head in sliding connection, and the piston rod extends into the inner piston cylinder and is provided with a second piston head in sliding connection. A first through hole and a second through hole are formed in the first piston head, a third through hole is formed in the second piston head, the adjusting assembly is installed on the piston rod and used for changing the liquid passing amount of the third through hole, the outer piston cylinder and the inner piston cylinder are both filled with damping liquid, and when the piston rod is compressed faster, the liquid passing amount of the third through hole is smaller, and the damping liquid passes through the third through hole. The adjusting assembly is arranged on the piston rod to adjust the liquid passing amount of the third through hole, namely, the size of the third through hole is changed, so that when the piston rod is compressed faster, the liquid passing amount of the third through hole is smaller, the road surface where a vehicle runs is more uneven, the damping force of the shock absorber is larger, and the shock absorption effect is effectively improved.

An electromagnetic valve connecting structure of a hydraulic shock absorber comprises a hydraulic cylinder and an electromagnetic valve, an electromagnetic valve mounting seat is welded to an outer oil hole formed in the cylinder wall of an outer cylinder of the hydraulic cylinder, the electromagnetic valve is arranged in the electromagnetic valve mounting seat, and an inner cylinder is arranged between the outer cylinder of the hydraulic cylinder and a working cylinder. An inner oil hole formed in the cylinder wall of the inner cylinder is opposite to the outer oil hole, a fixing seat is welded to the position of the inner oil hole, a valve seat of the electromagnetic valve is located in the electromagnetic valve installation seat, a T-shaped oil passing seat with an axial through hole is arranged between the valve seat and the fixing seat, and the small end of the T-shaped oil passing seat is inserted into an inner hole of the fixing seat. The T-shaped oil passing seat is in sealing connection with an inner hole of the fixing seat through an arranged circumferential sealing ring, the large end of the T-shaped oil passing seat makes contact with the oil inlet end of the valve seat through an arranged shaft end sealing ring to form sealing, an inner oil hole is communicated with the valve seat, and a supporting block used for limiting is arranged between a shaft shoulder of the large end of the T-shaped oil passing seat and the electromagnetic valve installation seat.

Disclosed herein are embodiments of an apparatus for detecting hydraulic shock events in a fluid system, the apparatus comprising a vibration sensor operable to output a vibration sensor signal indicative of sensed vibrations of one or more components of the fluid system, and a processing unit configured to: obtain a vibration velocity signal from the vibration sensor signal, the vibration velocity signal being indicative of a vibration velocity of the one or more components of the fluid system; detect one or more peaks in the vibration velocity signal; and classify one or more of the detected peaks as a hydraulic shock event.

The invention discloses a suspension type hydraulic shock absorber for an automobile. The suspension type hydraulic shock absorber comprises a shock absorption piston cylinder, a variable-ring-distance spring set and a variable-distance device. The damping piston cylinder comprises a hollow damping cylinder and a piston rod of which the end part is provided with a valve body; the piston rod is sleeved with the damping cylinder and slides up and down along the inner wall of the damping cylinder. The variable-ring-distance spring set is a double-line-distance spring formed by vertically stacking a pair of springs with different ring distances, the variable-ring-distance spring set is sleeved on the periphery of the damping piston cylinder, and the lower end of the variable-ring-distance spring set is fixedly connected with the lower end of the damping piston cylinder. The variable-pitch device is rotationally arranged on the periphery of the upper part of the damping piston cylinder, is rotationally connected with the piston rod and slides up and down along the outer wall of the damping cylinder; the upper portion of the variable-pitch device is rotationally connected with the upper portion of the variable-coil-pitch spring set, when the variable-pitch device rotates by a certain angle, compression of an upper spring of the variable-coil-pitch spring set is limited, and the upper spring is converted into a single-line-pitch spring. The spring of the shock absorber is switched between the equal line distance and the double line distance, the spring is selected according to different road conditions, and a more appropriate shock absorption springback feedback feeling is provided.

The utility model belongs to the technical field of tail hooks, and particularly relates to a tail hook oil cylinder which comprises a hydraulic cylinder, a hydraulic oil connecting pipe, an oil pump, a piston rod, a travel switch mechanism, a travel switch connecting piece, an abutting mechanism and a controller. The hydraulic cylinder is detachably connected with the travel switch body through the travel switch connecting piece, the side face of the travel switch body is hinged to the hinge block, the abutting mechanism comprises an elastic abutting rod and an abutting installation block, the abutting installation block is fixedly connected with the piston rod, a threaded hole is formed in the abutting installation block, and the elastic abutting rod is in threaded connection with the abutting installation block. The controller is in communication connection with the switch button and the oil pump; compared with the prior art, the utility model has the advantages and positive effects that the precision is high, the supply of hydraulic oil is cut off in time, the hydraulic impact of a hydraulic system can be reduced, the noise of the system is reduced, and the service life is prolonged.

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.