3719results about "Fluid-pressure actuators" patented technology

A pump system includes a housing defining a first internal volume and a second internal volume, a first piston positioned to separate the first internal volume into a first chamber and a second chamber, a second piston positioned to separate the second internal volume into a third chamber and a fourth chamber, a first inlet check valve configured to permit fluid flow into the first chamber, a second inlet check valve configured to permit fluid flow into the third chamber, a directional control valve (DCV) repositionable between (a) a first position where the DCV is configured to fluidly couple the second chamber to a high pressure fluid source and (b) a second position where the DCV is configured to fluidly couple the fourth chamber to the high pressure fluid source, and a relief valve configured to supply a fluid to the DCV through an orifice to move the DCV.

A modular electric power take-off (E-PTO) system for a refuse vehicle includes a modular housing. The modular E-PTO also includes a motor, an inverter, a battery, and a hydraulic pump positioned within the modular housing. The modular housing is removably coupled with a front of a waste receptacle or a hopper of the waste receptacle of a refuse vehicle.

The invention discloses a special cooling device for a computer GPU (Graphic Processing Unit) cluster server, which comprises a box body, a support frame, a circulating pipe, a cooling box, a first piston cylinder, a liquid outlet pipe, an injection pipe, a liquid inlet pipe, a heat dissipation mechanism, a cooling mechanism, a detection mechanism and an auxiliary mechanism, meanwhile, a filter plate can prevent dust in air from entering, a detection mechanism monitors the temperature in the box body in real time by utilizing the thermal expansion characteristic of alcohol, and a signal is transmitted to an external controller through a pressure sensor so that a worker can master the operation temperature state of the server in real time; the cooling mechanism automatically adjusts the flow speed and flow of cooling liquid according to temperature changes so as to meet the heat dissipation requirements of the server under different loads, the auxiliary mechanism conducts rolling sweeping on a filter plate through a cleaning roller, smooth air circulation is ensured, the efficient and intelligent cooling effect is achieved, and the service life of the server is prolonged. And the operation stability and the service life of the GPU cluster server are improved.

The utility model discloses a hydraulic rock drill which comprises a machine body composed of a machine base, a cylinder body, a middle body, a gear box, a gear box cover and a machine head which are sequentially connected, a first cavity for containing an impact piston and a second cavity for containing a bit shank are formed in the machine body, and a cooling lubricating cavity communicated with the first cavity and the second cavity is formed in the machine body. An air inlet chamber is formed in the machine base, and an air inlet communicated with the air inlet chamber is formed in the rear end of the machine base. The impact piston is provided with a central channel which is communicated with the air inlet chamber and the cooling and lubricating air chamber; an air passing channel which is communicated with a gap between the bit shank, the rotary assembly and the machine head and a gap between the bit shank and the machine head part is formed in the machine head; cooling and lubricating air introduced into the air inlet chamber enters the cooling and lubricating cavity through the center channel of the impact piston, sequentially passes through the bit shank, the gap between the rotary assembly and the machine head and the air passing channel, enters the gap between the head of the bit shank and the machine head and is blown out, and the situation that the cooling effect is poor due to the fact that air flow is poor after heat exchange is avoided.

The utility model belongs to the technical field of hydraulic execution components, and particularly relates to a hydraulic cylinder sleeve type connector which comprises a hydraulic cylinder sleeve body, a pipeline connecting piece is fixed at the upper end of the hydraulic cylinder sleeve body, an upper connecting piece is fixed inside the pipeline connecting piece, and a sealing ring is fixed at the lower end of the upper connecting piece. A centering conical barrel is fixed to the lower side of the hydraulic cylinder sleeve body, symmetrical locking hydraulic cavities are formed in the lower end of the interior of the hydraulic cylinder sleeve body, hydraulic cylinder covers are fixed to the upper ends of the symmetrical locking hydraulic cavities, limiting grooves are formed in the left side and the right side of an upper connecting piece, clamping jaws are arranged in the two limiting grooves, and a clamping block is arranged in the clamping jaws. The hydraulic piston cylinder moves to drive the piston connecting rod to move, so that the piston connecting rod drives the driving ring plate on the side wall to move, the driving ring plate is matched with the clamping jaw, the upper connecting piece and the lower connecting piece are clamped, locking and unlocking are easier, and the locking effect is better.

The present invention provides a swing type hydraulic actuator, which relates to the field of swing hydraulic cylinders. In order to solve the problem that the sealing performance and durability of the current swing hydraulic cylinder sealing structure are relatively poor, a cavity is formed by a cylinder body and a rotating shaft to accommodate stator blades and rotor blades, and the wedge surfaces of the end face sealing ring and the axial combined sealing ring are used to perform preliminary pre-tightening on the two seals; at the same time, an annular tightening oil chamber is provided on the end cover, and the pressure of the annular tightening oil chamber is adjusted according to the requirements of the working environment, so that the deformation of the end cover acts on the end face sealing ring and the axial combined sealing ring, providing a second pre-tightening for the end face sealing ring and the axial combined sealing ring, thereby improving the environmental adaptability of the blade type swing oil cylinder.

The utility model discloses a brake device for a tensioning oil cylinder, and belongs to the technical field of brake equipment. The brake device comprises a cylinder body, a piston, a brake ball, a brake cylinder and an elastic piece, a piston rod penetrates through the cylinder; the piston, the brake cylinder and the elastic piece are all arranged in the cylinder body, the bottom of the elastic piece is connected with the cylinder body, the brake cylinder is arranged above the elastic piece, and the piston is arranged above the brake cylinder; the brake ball can abut against the inner wall of the brake cylinder and the outer wall of the piston rod. A sealing cavity is formed between the cylinder body and the piston; and an oil inlet nozzle communicated with the sealing cavity is arranged on the cylinder wall of the cylinder body. The brake device opens the brake by using the pressure of hydraulic oil and holds the brake by using the restoring force of the elastic piece, so that the stability of the telescopic state of the piston rod is improved; and the brake opening or contracting time can be flexibly adjusted according to the change speed of the oil pressure. The utility model belongs to a normally closed brake structure, and meets the mechanical safety performance requirements of products.

A modular electric power take-off (E-PTO) system for a refuse vehicle includes a modular housing. The modular E-PTO also includes a motor, an inverter, a battery, and a hydraulic pump positioned within the modular housing. The modular housing is removably coupled with a front of a waste receptacle or a hopper of the waste receptacle of a refuse vehicle.

The utility model relates to the field of aerial work platforms, and discloses a liquid collecting device and an aerial work platform, and the liquid collecting device comprises a steering oil cylinder liquid receiving disc which is provided with a liquid receiving cavity used for receiving leaked liquid of a steering oil cylinder; the steering oil cylinder liquid receiving disc is detachably arranged on the liquid receiving disc mounting seat, the liquid receiving disc mounting seat is provided with a connecting part, and the connecting part is used for being connected with a cylinder body of a steering oil cylinder; and the limiting structure has a locking state and an unlocking state, when the limiting structure is in the locking state, the steering oil cylinder liquid receiving disc can be locked in the liquid receiving disc mounting base, and the steering oil cylinder liquid receiving disc can be taken out of the liquid receiving disc mounting base when the limiting structure is in the unlocking state. According to the liquid collecting device and the aerial work platform, leaked liquid of the steering oil cylinder can be collected, and the liquid leakage problem of the aerial work platform can be solved.

The utility model discloses an air cylinder facilitating lubrication of a piston rod, and relates to the technical field of air cylinders. The air cylinder comprises an air cylinder body. The air cylinder body is started to drive the extrusion assembly to move, lubricating oil in the extrusion assembly can be pushed in the retraction process of the extrusion assembly, and then when the lubricating oil in the extrusion assembly is pushed into the lubricating assembly, the lubricating oil makes contact with the outer surface of a piston rod in the air cylinder body; then the lubricating oil enters the backflow assembly, under the action of the backflow assembly, the lubricating oil in the backflow assembly can be slowly pushed to enter the lubricating assembly, the lubricating oil in the backflow assembly flows into the extrusion assembly, and in the flowing process, the lubricating oil can make full contact with a piston rod in the air cylinder body; and therefore, the air cylinder can be fully lubricated and is prevented from being abraded to influence the use of the air cylinder body.

A system for cooling plungers which operate in high pressure pumps. The system uses a plunger having a blind bore formed therein. The blind bore may receive a number of different objects, some of which are fixed to the plunger. A heat exchanger may be installed within the blind bore. The heat exchanger may have internal passages or openings which allow for the circulation of fluid within the blind bore, thus cooling the plunger. The heat exchanger may be formed of a material having a higher thermal conductivity than the material used to form the plunger. This allows the heat exchanger to cool the plunger more effectively than if the plunger were solid or filled with an empty air space. The heat exchanger may be sealed within the bore of the plunger, or exposed.

A pneumatic nail gun, comprising: a nail output portion (9) filled with a fastener, and a striking portion (1), the striking portion comprising a striker (4); and a lifting portion (11) for lifting the striker, the lifting portion comprising a sliding latch (16b); the sliding of the sliding latch in a rotary disk (12) causes the lifting portion to disengage from the striker, and the striker moves in a first direction, thereby realizing nailing.

The invention discloses a hydraulic mechanism for a water-cooled magnet structure with high mechanical stability. The hydraulic mechanism comprises a cylinder body, a piston, a check ring, a pressure equalizing pad, a limiting block, a first force transmission check ring, a first anti-rotation pin, a second force transmission check ring, a second anti-rotation pin, a first force transmission column and a second force transmission column. The water-cooled magnet has the advantages that axial stress application can be carried out on the magnet coil assembly, the pressing force on the magnet coil assembly is improved, the problems of tension fracture and damage caused by coil stress overrun due to overlarge radial expansion electromagnetic force of a magnet coil bit piece and an insulating piece are solved, and the high mechanical stability of the water-cooled magnet is improved.

The invention discloses a hydraulic oil cylinder with an axial supporting protection function, and belongs to the technical field of hydraulic cylinders, the hydraulic oil cylinder comprises an outer cylinder body, an oil cylinder rod and a first piston, a center oil cavity is formed in the outer cylinder body, the first piston is fixedly connected to the bottom of the oil cylinder rod, and the oil cylinder rod and the first piston are both slidably connected to the interior of the center oil cavity; a pressure buffering structure is connected into the outer cylinder body, when the oil cylinder rod bears pressure, the pressure buffering structure and the magnetic supporting structure are matched with each other to jointly share the pressure borne by the oil cylinder rod, a supporting rod in the magnetic supporting structure can transmit the pressure of the oil cylinder rod to a second piston, and therefore the oil cylinder rod is prevented from falling off. The second piston slides downwards in the storage cavity and extrudes the magnetorheological fluid, the stress of the oil cylinder rod is relieved through the buffering characteristic of the magnetorheological fluid, and therefore protection on the oil cylinder rod is effectively enhanced, and the stability and reliability of the hydraulic oil cylinder under the pressure effect are improved.

An aircraft wing includes a fixed structure and a linear hydraulic slat actuator attached to the fixed structure. The linear hydraulic slat actuator is oriented spanwise along the aircraft wing. The aircraft wing also includes an actuator output link and a slat attached to the actuator output link. The aircraft wing also includes a bell-crank coupled to the linear hydraulic slat actuator and to the actuator output link. In response to spanwise movement of the linear hydraulic slat actuator, the bell-crank is configured to move the actuator output link in a different direction that enables the slat to move between a retracted position and an extended position.

A hydraulic system for a hydrogen fueled gas turbine engine. The hydraulic system comprises a closed-loop hydraulic fluid conduit (232), a hydrogen-hydraulic fluid heat exchanger (230) configured to exchange heat between cryogenic hydrogen fuel and hydraulic fluid within the hydraulic fluid conduit (232), and a second fuel-hydraulic heat exchanger (518) configured to exchange heat between a second, non-hydrogen fuel and hydraulic fluid in the hydraulic fluid conduit (232).

The utility model relates to the field of aerial work platforms, and discloses an aerial work platform which comprises a chassis provided with a maintenance opening and a door body capable of sealing the maintenance opening. The power unit is arranged in the chassis; the liquid collecting assembly is arranged in the chassis and located below the power unit, the liquid collecting assembly comprises a power unit liquid receiving disc and a liquid receiving disc mounting piece, the liquid receiving disc mounting piece is provided with a liquid receiving disc sliding groove, and the power unit liquid receiving disc is arranged in the liquid receiving disc sliding groove in a sliding mode and is provided with a liquid receiving cavity used for receiving leaked liquid of the power unit; when the door body is in a closed state, the power unit liquid receiving disc can be locked in the liquid receiving disc sliding groove, and the power unit liquid receiving disc can be pulled out of the liquid receiving disc sliding groove when the door body is in an open state. According to the aerial work platform, leaked liquid of the power unit can be collected, and the liquid leakage problem of the aerial work platform can be solved.

The hydraulic oil cylinder with the protection structure comprises a cylinder body, a piston rod is arranged in the cylinder body in a sliding mode, a connecting block is fixedly installed at the end of the piston rod, a machining assembly is arranged outside the cylinder body, and the machining assembly comprises a protection assembly arranged outside the cylinder body. When the oil cylinder is used and a piston rod of the oil cylinder stretches out and draws back, the outer wall of the oil cylinder needs to be protected, when the piston rod pushes a connecting block to move, the connecting block drives a top cover to move along with the connecting block, and the top cover drives a protection pipe to move along with the top cover through a first bolt set. The sliding groove formed in the inner wall of the protection pipe slides on the outer wall of the sliding block fixedly installed on the outer wall of the cylinder body, under limitation of the sliding block, the protection pipe can slide on the outer wall of the cylinder body in a limited mode, the protection pipe moves along with the piston rod, the piston rod is not exposed outside, and the piston rod is protected.

The utility model relates to the field of aerial work platforms, and discloses an oil cylinder liquid collecting assembly and an aerial work platform, and the oil cylinder liquid collecting assembly comprises an oil cylinder liquid receiving part, a liquid collecting part and a liquid collecting part, the sliding groove piece is arranged below the oil cylinder and provided with a liquid receiving disc sliding groove, and the oil cylinder liquid receiving piece is arranged in the liquid receiving disc sliding groove in a sliding mode; and the liquid baffle is arranged on a mounting structural part of the oil cylinder and is used for guiding leaked liquid of the oil cylinder into the liquid receiving cavity. The oil cylinder liquid collecting assembly can comprise two liquid baffles which are arranged in a spaced mode, and a liquid guiding flow channel can be defined between the inner side plate faces of the two liquid baffles and the peripheral wall of the installation structural part. The lower plate ends of the two liquid baffles can be bent in the direction close to each other, so that an outlet in the lower end of the liquid guide flow channel is gradually narrowed. According to the oil cylinder liquid collecting assembly and the aerial work platform, leaked liquid of the oil cylinder can be collected, and the liquid leakage problem of the aerial work platform can be solved.

A modular hydraulically-adjustable preload and / or cross-over system. The system includes a housing configured to couple with a main damper cylinder, the housing including a slave cylinder within a portion of a slave cylinder chamber, the slave cylinder telescopically movable with respect to the housing; a fluid chamber; and a fluid port configured to provide a fluid flow for the fluid chamber, wherein an increase in a fluid volume within the fluid chamber causes a portion of the slave cylinder to telescopically extend from the slave cylinder chamber. A preload flange coupled with the slave cylinder at an end of the housing such that a change in a location of the slave cylinder causes a change in a location of the preload flange.

A bi-directional valve with valve elements having compliant features biasing them together to maintain a sealing interface that defines a fluid communication barrier within the valve. Parting the valve elements from one another removes the sealing interface allow fluid communication across the valve elements. The valve includes a side port and a choke member that selectively blocks fluid flow through the valve when moved adjacent the side port and selectively opens the valve to fluid communication when moved away from the side port. The choke member remains adjacent the side port until the valve elements are spaced a distance apart greater than that at which valve erosion or fluid cavitation occurs. Also included with the valve are systems for counterbalancing forces exerted onto the valve from differential pressures.

A device (1) for holding and / or moving a rod-shaped body (2) is proposed, comprising: a fully enclosed housing (3) with a longitudinal axis (L) along which the rod-shaped body (2) is guided or is to be guided; a thrust piston (4) surrounding the rod-shaped body (2), which can be subjected to a first pressure from the outside via a first pressure port (L) through the housing (3) and which can be subjected to a second pressure from the outside via a second pressure port (K) through the housing (3), and which has a first effective surface (5) and a second effective surface (6), which effective surfaces (5, 6) preferably extend in a radial direction, wherein the first effective surface (5) is in fluidic operative connection with the first pressure port (L) and the second effective surface (6) is in fluidic operative connection with the second pressure port (K), wherein the thrust piston (4) has a radially internal recess (7) through which a circumferential free space (8) is formed between the rod-shaped body (2) and an inner surface (9) of the thrust piston (4), which free space (8) has an axial limit (10, 11) on both sides; and at least one clamping sleeve (12) which, with its inner surface (13), defines a central cylindrical area through which the rod-shaped body (2) is guided or can be guided, and which is received in the aforementioned free space (8), extending axially between the two axial limits (10, 11), wherein the clamping sleeve (12) can be subjected to a third pressure from the outside via a third pressure port (V) through the force-pull piston (4) and is designed to deform itself reversibly radially inwards according to the third pressure and to exert a holding force on the rod-shaped body (2).

The invention belongs to the technical field of engineering hydraulic oil cylinders, and particularly relates to a hydraulic oil cylinder with a filtering mechanism for reducing pollutant accumulation. An air inlet pipe is directly connected with an external cold air source, cold air can be directly diffused in a device box and wraps a hydraulic oil cylinder body, and meanwhile a motor drives fan blades to rotate through a third rotating shaft; according to the oil cylinder cooling device, flowing of cold air in the device box body can be accelerated, the heat dissipation effect of the oil cylinder can be enhanced, heat accumulation caused by local retention of the cold air can be avoided, meanwhile, suspended dust generated by cleaning of the cleaning brush, small impurities which are not settled in the cold air and falling objects in the using process of the cleaning brush can be sucked, and the cleaning effect is improved. And the cleaning rod rotates under the rotation of the third rotating shaft, so that the impurities blocked by the second filter screen are cleaned, and the impurities enter a first collecting box through a connecting pipe.

The invention provides a hydrodynamic actuator which comprises a piston cylinder, a piston, a piston rod for connecting the piston and the outside of the piston cylinder, and a cylindrical piston cylinder sleeve, the piston cylinder sleeve is connected to the outer side of the piston cylinder in a sleeving mode from the first piston cylinder end cover. A sealing piece matched with the inner wall of the piston cylinder sleeve is arranged on the outer wall of the piston cylinder and / or the first piston cylinder end cover; the piston rod penetrates through the first piston cylinder end cover of the piston cylinder and is fixedly connected with the bottom of the piston cylinder sleeve; a first driving fluid cavity is formed between the piston and the first piston cylinder end cover; a second driving fluid cavity is formed between the first piston cylinder end cover and the piston cylinder sleeve; a fluid rotation cavity is formed between the piston and the second piston cylinder end cover. The technical scheme can be widely applied to the field of force transmission components such as hydraulic cylinders and pneumatic cylinders.

To provide a robot hand having fluid pressure actuators and capable of aligning time of deformation between the fluid pressure actuators.SOLUTION: An actuator installation structure 19 comprises: a plurality of fluid pressure actuators 20 having actuator bodies 22 that bend to be deformed due to pressure of a fluid supplied therein and installation parts 32 in which a flow path R for supplying the fluid from the longitudinal one piece of each actuator body 22 into the actuator body 22 is formed; and a housing 40 having a space into which the fluid is supplied and a plurality of installed parts 60 corresponding to the installation parts 32 of the fluid pressure actuators 20 on the outer surface and having the flow path R connected to the space through attaching of the installation parts 32 to the installed parts 60.SELECTED DRAWING: Figure 9

The utility model provides a rotary sealing structure and a pneumatic system with the rotary sealing structure, the rotary sealing structure is connected with an air cylinder, and the rotary sealing structure comprises a shaft body connected with the air cylinder; a first air inlet channel and a first air outlet channel are formed in the shaft body and communicate with a cylinder body of the air cylinder. The shaft body is sleeved with the sealing component, a second air inlet channel and a second air outlet channel are formed in the sealing component, the second air inlet channel is communicated with the first air inlet channel, and the second air outlet channel is communicated with the first air outlet channel. The problems that in the prior art, a rotary sealing shaft cannot supply air to an air cylinder in the rotating process, the air cylinder needs to be provided with an independent air path, and consequently a pneumatic system is complex in structure are solved.

The application provides a heavy-load large-stroke lifting and leveling device and method, which internally adopts multi-stage cylinder driving, externally balances lateral load by multi-stage overlapping sleeves, and reverses the oil cylinder to replace the last sleeve with the outer cylinder of the oil cylinder; a weighing sensor is arranged at the bottom to detect the load in real time; and finally, the heavy-load equipment is lifted and leveled in a large stroke under the condition of limited closed size limitation.

The invention relates to the technical field of hydraulic cylinders, and particularly discloses a double-seal adjustable hydraulic oil cylinder leakage-proof mechanism and a hydraulic oil cylinder thereof.The double-seal adjustable hydraulic oil cylinder leakage-proof mechanism comprises a cylinder barrel, a piston rod is slidably arranged in the cylinder barrel, a sleeve shell is arranged in the cylinder barrel, the outer surface wall of the piston rod is sleeved with the sleeve shell, and a first sealing ring is arranged in the sleeve shell; the outer surface wall of the piston rod is sleeved with the first sealing ring, multiple sets of adjusting screw rods are rotationally arranged at the upper end of the sleeve shell, the end, away from the sleeve shell, of each set of adjusting screw rod is in threaded connection with the cylinder barrel, multiple sets of sealing assemblies are arranged at the upper end of the cylinder barrel, and each set of sealing assemblies is matched with the corresponding adjusting screw rod; and a second sealing ring and a third sealing ring are embedded in the cylinder barrel. The maintenance difficulty is reduced, equipment does not need to be disassembled, slight leakage of hydraulic oil caused by long-time telescopic movement can be rapidly eliminated, the sealing performance of the hydraulic oil cylinder is improved, and meanwhile the maintenance cost is reduced.

The invention discloses a combined piston rod type support oil cylinder which comprises a cylinder barrel, a mounting flange, a first rod body, a locking nut, a second rod body, a guide sleeve, a sleeve, a front gland and a rear gland, wherein the second rod body, the guide sleeve, the sleeve, the front gland and the rear gland are mounted in the cylinder barrel. The first rod body and the second rod body are in threaded connection to form a piston rod, trapezoidal threads are arranged on a rod body of the first rod body, the locking nut is in threaded connection with the first rod body, and the mounting flange is arranged on a barrel body of the cylinder barrel in a sleeving mode. The problem that the whole piston rod is difficult to maintain is solved, and quick replacement of the threaded section is achieved; hydraulic pressure maintaining is replaced by mechanical locking, and the oil leakage risk of the system is eliminated. The structure is particularly suitable for industrial equipment, oil drilling equipment and other high-load scenes needing long-term stable supporting, and the maintainability and reliability are remarkably improved while the bearing capacity is guaranteed.

An adjustable wear block for a mast system can include a housing and a wear pad arranged on an adjustable base within the wear block housing. In one embodiment, the wear block, wear pad, and adjustable base all have a circular cross-section. Threading on the outside of the base can match threading on an inner wall of the housing. As the base is rotated within the housing, the position of the base and the attached wear pad can be adjusted with respect to the housing. A hole can be provided through a channel or mast wall to permit an adjustment tool to be used to adjust the position of the base with respect to the housing after the wear block is secured to the carriage or mast. In an alternate embodiment, a hydraulic piston can drive the position of the wear pad with respect to the wear block housing.