127 results about "Hydraulic shock" patented technology

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.

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 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.

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.

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 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.

This utility model relates to the field of hydraulic cylinder technology and discloses a buffer sealing structure for resisting hydraulic shock. It includes a cylinder body with an oil inlet and an oil outlet sequentially installed from front to back on the top of the cylinder body. An oil chamber is formed in the middle of the cylinder body. A piston block is slidably connected inside the cylinder body, located in the middle of the oil chamber. A piston rod is slidably connected to the middle of the cylinder body, and the piston rod is connected to the piston block. A sealing ring is installed on the outer periphery of the piston block. A movable ring is slidably connected to the middle of the piston block, and a buffer pad is installed on the outer side of the movable ring. In this utility model, when the piston block slides in the oil chamber and approaches the end of the cylinder body, the buffer pad contacts the inner wall of the cylinder body end, thereby pushing the movable ring to compress the compression spring. The compression spring absorbs and reduces the impact force, while the buffer pad prevents further absorption and reduction of impact force and avoids wear caused by collision.

The application discloses a railway wagon running device and relates to the technical field of running devices, which comprises two symmetrical bottom frame mounting seats, axle box assemblies arranged on the corresponding bottom frame mounting seats, wheel pairs connected between the two axle box assemblies through bearings at two ends, a brake device arranged between the two bottom frame mounting seats and fixed below a vehicle body bottom frame, a traction pull rod arranged between the axle box assemblies and the bottom frame mounting seats in cooperation, two suspension springs, a vertical hydraulic shock absorber and a transverse hydraulic shock absorber. The application has the advantages of compact structure, light weight, reduced self weight of the whole vehicle, improved vehicle operation benefit, stable vehicle operation ensured by the cooperation of the suspension springs, the vertical hydraulic shock absorber and the transverse hydraulic shock absorber.

The present invention circumvents a rapid pressure rise due to hydraulic shock while making it possible to maintain a good closed state.　The present invention comprises: a contact part 24a which is brought into contact with a valve seat; a deformation part 24b which is elastically deformed during opening and closing; and a plate-shaped part 25 which is formed from a material having a higher hardness than the contact part 24a and the deformation part 24b, and to which the contact part 24a and the deformation part 24b are attached. The plate-shaped part 25 is provided with a protruding part 25a that is inserted into a cylindrical part, the tip of which is provided with the valve seat. The contact part 24a is provided with an insertion hole 24ha through which the protruding part 25a can be inserted, and an annular projection 24p that surrounds the insertion hole 24ha, has a diameter smaller than the inner diameter of the cylindrical part, and projects in the seating direction of the contact part 24a with respect to the valve seat. The annular projection 24p has a projection length defined such that the insertion length into the cylindrical part when the contact part 24a is seated on the valve seat is shorter than the insertion length of the protruding part 25a into the cylindrical part.

The invention discloses a flushing-reducing backwashing filter for a fully-mechanized coal mining hydraulic support of a coal mine. Comprising a main valve body, a first electromagnetic pilot valve arranged on the main valve body, a first valve element assembly arranged in a first valve cavity of the main valve body, a second valve element assembly arranged in a second valve cavity of the main valve body, a first filtering assembly arranged in a third valve cavity of the main valve body and a second filtering assembly arranged in a fourth valve cavity of the main valve body. The second valve cavity communicates with the fourth valve cavity, and the first electromagnetic pilot operated valve is arranged to be used for adjusting the opening degree of the first valve element assembly. Through cooperation of the first electromagnetic pilot valve and the first valve element assembly, the impact-reducing back-flushing filter for the fully-mechanized coal mining hydraulic support has the function of reducing the starting impact of a hydraulic cylinder, and when the filter is used in the fully-mechanized coal mining hydraulic support, the hydraulic impact generated when the hydraulic cylinder is started can be reduced, and the pressure and flow of a working oil port can be stabilized; and meanwhile, the valve element assembly and the filtering assembly are arranged in the same main valve body, so that the integration level is improved.

This invention discloses a sensorless multi-stage tower erection mechanism and its control method. The method includes: establishing a state machine with multi-stage action interlocking and setting a virtual position counting variable; when each stage of the multi-stage telescopic boom extends, the counting variable changes along a first direction and the hydraulic drive unit switches its speed accordingly each time the interval proximity switch is triggered, until the approach switch is triggered when the boom reaches its final position and stops; when each stage of the multi-stage telescopic boom retracts, the counting variable changes along a second direction and the hydraulic drive unit switches its speed accordingly each time the interval proximity switch is triggered, until the approach switch is triggered when the boom reaches its final position and stops. This invention utilizes only inexpensive proximity switches in conjunction with dual trigger blocks and counting logic to achieve a servo-like "slow-fast-slow" S-shaped speed curve, solving the hydraulic shock problem caused by the lack of a displacement sensor, eliminating the risk of disordered multi-stage action sequence, and achieving high safety.

This invention relates to the field of slewing drive technology, and discloses a sliding system, adjustment method, and engineering machinery. The sliding system of this invention is applied to the slewing mechanism of engineering machinery, including a hydraulic oil tank, a hydraulic motor, a first pipeline, a second pipeline, and a slewing control module. The hydraulic motor is connected to the hydraulic oil tank, and the two pipelines are respectively connected to its inlet and outlet ends. The slewing control module includes a slewing directional valve, a free-slide proportional valve, and two slewing balance valves. The slewing directional valve can switch between blocking and conducting positions. The slewing balance valve has a load feedback valve core. The free-slide proportional valve is connected in parallel to two pipelines and is connected to a bypass oil circuit and the main machine tilt sensor. Its opening degree is controlled by its current signal. The sliding system of this invention can achieve stepless speed regulation of slewing, reduce hydraulic shock, and prevent slippage by maintaining pressure through the slewing balance valve. Compared with mechanical speed regulation, it is smoother and can achieve independent control of forward and reverse rotation, improving operational safety and stability.

The utility model relates to the technical field of ground penetrating radars, and discloses a vehicle-mounted ground penetrating radar device which comprises a vehicle carrier and a second supporting connecting plate, the rear side of the vehicle carrier is connected with a detection mechanism in a sliding mode, the top of a support is fixedly connected with a damping assembly, and the damping assembly comprises a base. Two flange connectors are slidably connected to the top side of the interior of the base, connecting bases are fixedly connected to the tops of the flange connectors, hydraulic shock absorbers are fixedly connected to the tops of the connecting bases, and first springs are fixedly connected to the tops of the connecting bases. According to the utility model, the hydraulic shock absorber and the connecting seat at the bottom of the support are matched with the first spring to effectively absorb road bumping, the hydraulic shock absorber is matched with the second sucker through the first sucker to support replacement of the air pressure spring, improve vibration isolation effect and efficiency, save installation time, and dynamically adjust detection depth and enhance reliability during advancing; and the system performance is optimized.

This invention discloses a method and system for ensuring navigation safety in a multi-level water-saving ship lock based on digital twins. The method includes: collecting multi-source sensor data, generating an aligned data stream and quality assessment report, and updating the digital twin state; using the aligned data stream and quality assessment report, obtaining the mooring force probability distribution through non-contact observation and probabilistic fusion; identifying the hydraulic shock response based on the digital twin state and the aligned data stream, and generating a vibration-suppressing opening template using hydraulic phase-locked tracking; within the digital twin system, integrating the mooring force probability distribution and the vibration-suppressing opening template, performing sub-Bruker stochastic control barrier optimization, and outputting an executable valve trajectory. This invention can actively suppress water hammer oscillations and provide robust safety guarantees for uncertain mooring forces, effectively improving the navigation safety of large water-saving ship locks.

The invention belongs to the technical field of hydraulic shock absorbers, and particularly relates to a vacuum-pumping oil injection system which is characterized in that an extraction opening of an extraction pipe of a vacuum-pumping system and an oil injection opening of an oil injection pipe of an oil injection system are communicated with a cavity of a hydraulic shock absorber, so that the hydraulic shock absorber completes vacuum-pumping and oil injection operation at the same station, and the production efficiency is improved; the pumping pressurizing device and the gas storage tank are arranged on the vacuumizing system, so that the hydraulic shock absorber is vacuumized, and pumped gas is stored in the gas storage tank; the oil storage tank with the internal oil storage cavity and the compressed air cavity isolated from each other is arranged on the oil injection system, so that oil is pre-stored in the oil storage cavity and then injected into the hydraulic shock absorber through the oil injection pipe; the compressed air cavity is communicated with the air storage tank, so that oil in the oil storage cavity is rapidly pressed into the cavity of the hydraulic shock absorber under the dual action of the vacuum cavity of the hydraulic shock absorber and high-pressure air in the air storage tank, the oil injection operation is rapidly completed, air in the cavity of the hydraulic shock absorber is reduced, and the response speed of the hydraulic shock absorber is increased.

The application relates to the technical field of automobile damping, and discloses a swing arm type independent suspension steering axle. The swing arm type independent suspension steering axle is provided with a combined structure of a swing arm, damping springs and a cylinder type hydraulic shock absorber. When the vehicle passes through uneven road surfaces, the wheels jump, the cantilever swings up and down, the damping springs and the hydraulic shock absorber are driven to make up-and-down extension and contraction movements, the damping force generated by the hydraulic shock absorber and the buffering force of the damping springs offset or reduce the vibration, so that the damping effect is achieved. Meanwhile, the damping holes are arranged in a spiral shape, the path of the hydraulic oil is increased when the hydraulic oil passes through the spiral damping holes, the impact force and the friction force are increased at the inflection points of the spiral holes, the energy loss of the hydraulic oil is increased, the damping is improved, the impact energy generated during the vibration is efficiently consumed, and the damping effect is improved.

The invention discloses a vibration excitation rotary valve for stabilizing the pressure of a throttling opening and a circular bead and a shaft sleeve of the vibration excitation rotary valve, and belongs to the field of electro-hydraulic vibration excitation. The vibration excitation rotary valve comprises a valve body, a valve sleeve and a valve element. The valve element is driven by an external motor to continuously rotate, a plurality of circular beads are arranged on the valve element in the axial direction, a plurality of throttling grooves are evenly formed in each circular bead in the circumferential direction, and the key improvement is that pre-openings are formed in the two sides of each throttling groove in the circumferential direction. And a plurality of T-shaped windows are correspondingly formed in the valve sleeve. When the valve element rotates, the throttling groove and the T-shaped window are overlapped in the radial direction to form a variable throttling opening which is opened and closed periodically. Before the main throttling area is completely opened, the pre-opening and the edge of the window can form a tiny pilot overflowing area in advance, so that the through-flow area of the throttling opening is smoother along with the change of the rotating angle, and active control over the pressure acceleration of the throttling opening is achieved. Through collaborative design of the pre-opening and the T-shaped window, hydraulic impact and pressure sudden change caused by instantaneous opening and closing of a valve port of a traditional rotary valve are effectively relieved, the working stability and reliability of the excitation rotary valve under the high-frequency working condition are remarkably improved, and vibration noise is reduced.

The utility model relates to tank transportation technical field, concretely is a kind of shock-absorbing fixing device of liquid ammonia transport vehicle. It includes shock absorber and two groups of clamping components. Two groups of clamping components all include first semicircle ring and second semicircle ring, and U-shaped frame is connected on first semicircle ring and second semicircle ring;Shock absorber includes longitudinal buffer assembly and transverse buffer assembly, wherein, longitudinal buffer assembly includes fixed base, the buffer seat being arranged on the top of fixed base and the multiple first hydraulic shock absorber being installed between fixed base and buffer seat;Transverse buffer assembly is provided with two groups, and two groups of transverse buffer assembly are respectively installed at the both ends of buffer seat. The utility model has the characteristics of good shock-absorbing effect and high stability.

The invention discloses a double-end-cover axial variable vane pump which comprises a pump body, a transmission shaft is coaxially arranged in an inner cavity of the pump body and extends out of one side of the pump body, the other side of the pump body is sealed through an upper pump cover, a driving disc is coaxially and integrally formed on the transmission shaft and located in the pump body, and a plurality of sets of vanes are evenly arranged on the driving disc in a clearance fit mode along the circumference. A stator is coaxially fixed to an inner cavity of the pump body, the transmission shaft is matched with the stator through the pump body for axial limiting, the outer ring of the stator is slidably sleeved with a pressing cylinder, the pressing cylinder is in clearance fit with the inner wall of the pump body, and the distance between the pressing cylinder and the driving disc is adjustable. According to the vane pump, on the basis of solving the problems of hydraulic impact, cavitation, extra pressure of a vane root cavity and flow pulsation in the flow distribution process, the maximum lead between the vane and the stator is changed through vertical movement of the pressing cylinder so as to control the suction amount and the discharge amount of oil, and the vane pump has the advantages of no flow distribution, low pulsation, low noise, variable quantity and the like.

The application belongs to the field of impact load test of aircraft parts, and particularly relates to a hydraulic impact load amplitude test device and a correction method, which comprises: an actuating cylinder hinged to a wall surface, an output shaft of the actuating cylinder being provided with a force sensor, the force sensor being connected with a test piece; the actuating cylinder is connected with an oil source through an actuating cylinder pipeline; the actuating cylinder is further provided with a displacement sensor, the force sensor is further provided with a first acceleration sensor, and the method overall scheme separately corrects the impact force sensor, an adapter and the test piece. Finally, the results are superposed to correct the influence of inertial force on the impact load.

The utility model discloses a plate surface structure which comprises a front panel, a rear panel and an elastic connecting plate, one end of the elastic connecting plate is connected with the front panel, and the other end of the elastic connecting plate is connected with the rear panel. And a spring hydraulic shock absorber is arranged between the front panel and the rear panel. Mounting seats are arranged on the front panel and the rear panel, and the spring hydraulic shock absorbers are mounted on the mounting seats in a hinged mode. Elastic pieces are arranged at the connecting positions of the front panel and the rear panel and the elastic connecting plates. The elastic connecting plate is a metal reed or a carbon fiber plate. By optimizing the connection structure of the electric skateboard surface and the configuration of the damping assembly, the multi-dimensional absorption capacity of vertical impact and transverse friction vibration is improved, and vertical jumping and bumping of the board surface in the riding process are reduced, so that multi-dimensional damping is achieved.

The utility model discloses a dumper rear suspension structure which comprises a balanced suspension, a frame is respectively connected with a middle axle and a rear axle through the balanced suspension, the dumper rear suspension structure further comprises a hydraulic damping assembly, the hydraulic damping assembly comprises a hydraulic oil cylinder, a first rotating mechanism, a second rotating mechanism and a connecting plate, and the connecting plate is rotatably connected with the balanced suspension. The first rotating mechanism and the second rotating mechanism are arranged on the two sides of the hydraulic oil cylinder respectively and hinged to the two ends of the hydraulic oil cylinder respectively, the first rotating mechanism is hinged to the connecting plate and the middle axle simultaneously, and the second rotating mechanism is hinged to the connecting plate and the rear axle simultaneously. A traditional plate spring is replaced with the hydraulic damping assembly, cost and weight are reduced, the space utilization rate is increased, noise is reduced, maintenance is convenient, meanwhile, the hydraulic oil cylinder can adjust oil pressure according to different loads of a vehicle, vibration caused by uneven road surfaces can be relieved through the damping effect of the hydraulic oil cylinder, and driving comfort is remarkably improved.

The utility model discloses a shock absorber rebuilt valve with an improved structure, which relates to the technical field of shock absorber rebuilt valves and comprises a cylinder and a rebuilt valve pressure adjusting device. The rebuilt valve pressure adjusting device comprises a through opening round block, a sliding plate, a guide sliding rod, a sealing plug, a spring and a long bolt, the through opening round block is fixedly connected into a cylinder, a drainage round hole is formed in the surface of the through opening round block, two sliding grooves are formed in the inner wall of the cylinder, the sliding plate is slidably connected into the two sliding grooves, and the guide sliding rod is slidably connected into the sliding plate in a sleeved mode. The sealing plug is fixedly connected to the upper end of the guide sliding rod, the sealing plug is slidably connected to the interior of the drainage round hole, the spring is slidably arranged on the surface of the guide sliding rod in a sleeving mode, the shock absorber rebuilt valve can be suitable for hydraulic shock absorbers of different grades of vehicle types, a user can conveniently adjust the shock absorber rebuilt valve according to actual use requirements, and the use is convenient. The application range of the shock absorber rebuilt valve is enlarged, and the practicability of the shock absorber rebuilt valve is improved.

The utility model provides a driving system of an oil pump, an active suspension assembly and a vehicle. The driving system of the oil pump comprises the oil pump, a driving piece and a planet row speed reducing mechanism. The two oil pumps are suitable for supplying oil to hydraulic shock absorbers on the two transverse sides of the vehicle correspondingly. One end of the driving part is in power connection with the oil pump on one side through one group of planet row speed reducing mechanism, and the other end is in power connection with the oil pump on the other side through the other group of planet row speed reducing mechanism; the driving piece outputs power to the planet row speed reducing mechanism and controls a gear ring of the planet row speed reducing mechanism to rotate forwards or reversely, and therefore the gear ring drives the oil pump to rotate forwards or reversely. According to the driving system of the oil pump, power can be output towards the planet row speed reducing mechanisms on the two sides at the same time through the driving piece, forward rotation and reverse rotation of the oil pumps on the two sides of a vehicle are achieved, cost is reduced, and the space occupied in the axial direction of the driving piece is saved through the structural layout of the planet row speed reducing mechanisms.

The invention provides a super hydraulic impact hammer, and belongs to the technical field of hydraulic impact hammers. Comprising an impact unit, the impact unit is inserted into a shell sleeve, the impact unit is used for impacting a piston to make the piston move up and down in a reciprocating mode, and the bottom end of the shell sleeve is sleeved with a piston sleeve. By arranging the impact unit, the high-pressure fluid flows in the impact unit to form a high-low pressure difference, so that when the piston is promoted to impact the drill bit downwards, the high-pressure fluid provides power, and meanwhile, the fluid in the lower cavity of the piston is extruded to the upper cavity of the piston to provide impact power; and the high-pressure fluid can directly penetrate through the impact hammer to directly impact the rock debris, so that the energy loss is reduced, and meanwhile, the debris cleaning efficiency is improved.

A gas-hydraulic shock absorber contains a housing having a filler plug, a movable buffer installed in the housing, a movable separating piston, throttle valves, and a bypass valve. The housing is formed by a cylinder fixed on a base and plugged with a bottom on one side, and having an installed axle box on its opposite side. The movable buffer is a hollow rod, plugged on one end with a removable cover with a gas-charging valve placed in it, and plugged on the opposite end with a fixed throttle piston. The movable separating piston is made with at least one annular groove for placing seals and an annular guide element in the annular grooves. The movable separating piston is arranged in the hollow rod.

This invention relates to the field of screw fastening machine technology, and provides a servo-driven automatic screw fastening machine with clamping function. It includes a worktable, with a servo-driven longitudinal guide rail on the top surface of the worktable. A slide with clamping components is fitted onto the outer wall of the guide rail for positioning and clamping the workpiece to be fastened. A dual-axis moving module is located on the right side of the top surface of the worktable. The dual-axis moving module includes a first moving platform along the X-axis and a second moving platform along the Y-axis. The first moving platform drives the second moving platform to achieve X-axis directional movement, and the second moving platform drives the fastening mechanism to achieve Y-axis directional movement. The automatic clamping structure achieves automatic centering and clamping of the workpiece without additional power, eliminating the need for manual assembly. Through a single motor's full-range linkage drive, it features high synchronization of actions, low energy consumption, hydraulic shock absorption to protect the workpiece and screwdriver bit, uniform torque, and strong applicability.

The invention relates to the technical field of launching devices, in particular to a barrel cover switch driving device and a launching device. An existing launching device is improved, especially a barrel cover switch driving device is optimized, and the resistance balance structure capable of providing acting force for preventing a piston rod of the hydraulic cylinder from stretching out and drawing back for the telescopic end or the connecting rod structure of the hydraulic cylinder in the negative load process of the hydraulic cylinder is arranged; when the hydraulic cylinder is switched from the positive load state to the negative load state, the resistance balance structure can be triggered, so that certain resistance is provided for continuous stretching or retracting of the piston rod of the hydraulic cylinder, the negative load is counteracted or weakened through the resistance, the energy consumption of the hydraulic system is reduced, the hydraulic system is protected, and the service life of the hydraulic system is prolonged. And meanwhile, hydraulic impact generated during positive and negative load alternation is weakened, so that the positive and negative load alternation process during cover opening and closing is more stable.

This application discloses a dual-path segmented decoupled damping hydraulic shock absorber, including a working cylinder, a piston assembly, and a piston rod. The piston assembly divides the inner cavity of the working cylinder into a compression chamber and a recovery chamber, and defines a spring valve chamber within the piston assembly. The top of the spring valve chamber has a first throttling orifice and a second guide orifice connecting to the recovery chamber, and the bottom has a third guide orifice connecting to the compression chamber. A first valve plate and a second valve plate are respectively provided within the spring valve chamber corresponding to the second and third guide orifices. A pre-tensioning compression spring is provided between the two valve plates to provide a pre-tensioning force with a set threshold, thereby driving the two valve plates to block the corresponding guide orifices. The second valve plate has a fourth flow-limiting orifice with a flow cross-sectional area smaller than that of the third guide orifice. This application controls the axial translational opening of the bidirectional valve plates with a single spring, utilizing a fixed orifice plate throttling and spring static balance mechanism to achieve physical separation and complete decoupling of high and low speed damping within a compact space, giving the system stable and consistent low-speed damping and a clear high-speed valve opening threshold.