141results about "Piston rods" patented technology

The present plated member includes, on an outer surface, a plated film mainly composed of chromium deposited from a trivalent chromium bath containing at least chromium, carbon, and oxygen, in which the plated film contains 60 to 80 at % of chromium and 16.5 to 30 at % of carbon and has an indentation hardness of 7 GPa or more on the outer surface, and a degree of crystallinity calculated from a peak integrated intensity ratio of a measured value of X-ray diffraction measurement and the following expression (1) is 4% or less.

The invention provides a piston rod with a self-lubricating coating and a preparation method of the piston rod. The piston rod comprises a substrate and a chromic oxide layer which are arranged in a stacked mode. The chromic oxide layer comprises a chromic oxide inner layer and a chromic oxide film layer which are arranged in a stacked mode, the chromic oxide inner layer is located in the direction close to the substrate, and the density of the chromic oxide film layer is higher than that of the chromic oxide inner layer; the surface of the chromium oxide layer is provided with at least one pit, and each pit is filled with lubricating filler. According to the piston rod with the self-lubricating coating, the compact chromium oxide film layer has high corrosion resistance and abrasion resistance and can effectively block and isolate grease with corrosion property from immersing, and therefore it is guaranteed that the bonding strength of the chromium oxide layer and a substrate is not affected by corrosion factors; in addition, at least one pit is formed in the surface of the chromium oxide layer, the lubricating filler can be filled in the pit, a good lubricating effect is achieved, and therefore the lubricating performance of the piston rod is further improved.

The sealing device comprises a first sealing assembly and a second sealing assembly, the first sealing assembly is arranged at the end, away from a gun head, of an inner cavity, the first sealing assembly comprises a sealing lantern ring, a first pressing plate and a first sealing ring, the sealing lantern ring is embedded in the inner cavity, and the first pressing plate is arranged on the first sealing ring. The first pressing plate is partially embedded in the inner cavity and abuts against the sealing lantern ring, the sealing lantern ring is in interference fit with the outer diameter of the piston rod, and the first sealing ring is arranged on the outer wall of the sealing lantern ring in a sleeving mode so as to apply radial pressing force to the sealing lantern ring; the second sealing assembly is arranged at the joint of the cylinder body and the gun head and comprises a second sealing ring, a second pressing plate and a push plate, the gun head is sleeved with the second sealing ring, the second pressing plate is embedded in the cylinder body and presses the gun head, and the push plate is connected to the cylinder body so as to press the second pressing plate. According to the technical scheme, the sealing effect and durability of the pipettor are improved.

One or more techniques and / or systems are disclosed for a mechanical assembly comprising a connecting rod with a first end and a second end, a crankshaft journal, a wrist pin, and at least one guide spacer. The crankshaft journal may be coupled to the first end of the connecting rod, allowing for the transmission of rotational forces. The wrist pin may be configured to attach to the second end of the connecting rod, facilitating the transfer of mechanical motion. At least one guide spacer may be positioned on the wrist pin, located on either side of the connecting rod at the second end, to provide alignment and reduce wear. The crankshaft journal and the wrist pin may be arranged in parallel, enabling the connecting rod to perform both rotational and reciprocating motions.

The subject matter of this specification can be embodied in, among other things, an apparatus that includes a first assembly having a first piston rod having a first rod end, a second assembly arranged substantially parallel to the first piston assembly and having a second piston rod having a second rod end, an end assembly defining a first aperture configured to receive the first rod end, and a second aperture configured to receive the second rod end, a first retaining cap configured to affix to the first rod end, abut the end assembly when affixed to the first rod end, and retain the first rod end within the first aperture, and a second retaining cap configured to affix to the second rod end, abut the end assembly when affixed to the second rod end, and retain the second rod end within the second aperture.

The utility model discloses a hollow piston rod for an automobile, which relates to the field of piston rods, and comprises a main shaft, a first connecting part and a second connecting part which are coaxially arranged, and the first connecting part and the second connecting part are respectively connected to two opposite ends of the main shaft; the first connecting part extends in the direction away from the main shaft and is used for being connected with an output shaft of a hydraulic cylinder. The second connecting part extends in the direction away from the main shaft and is used for being connected with an automobile. The diameter of the first connecting part is smaller than that of the main shaft, and a first external thread used for being matched with an output shaft of a hydraulic cylinder is arranged on the periphery of the first connecting part. The utility model has the advantage that the piston rod is convenient to connect and limit.

A working cylinder has a cylinder with a cylinder tube, a first closure part arranged on a first cylinder tube end and a second closure part arranged on a second cylinder tube end, The cylinder tube and the closure parts define a cylinder interior. A piston unit defines at least one working space in the cylinder interior and passes through the first closure part and has an outer end portion. The working cylinder has a corrosion resistant rod-side threaded coupling module with a threaded portion and a weld-on portion. The threaded portion is for coupling to a device to be actuated. The coupling module is welded by the weld-on portion to the outer end portion of the piston unit by a weld seam. The threaded portion is arranged on a longitudinal axis of the piston unit.

The utility model discloses a piston and piston rod connecting structure capable of preventing a piston rod from being broken, which comprises an outer cylinder, the piston rod and a piston block, and is characterized in that a support plate is fixed inside the outer end of the outer cylinder, the outer cylinder is fixed at two ends of the support plate through a connecting rod, and a vertical plate is fixedly connected to the upper side of the support plate. The vertical plate is connected with a piston rod limiting assembly; the piston rod limiting assembly comprises a sliding groove, the sliding groove is formed in the middle of one side of the supporting plate, one end of a T-shaped sliding block is arranged in the sliding groove, and racks are fixedly arranged at the two ends of a transverse rod of the T-shaped sliding block respectively. The utility model relates to the technical field of pistons, in particular to a piston and piston rod connecting structure capable of preventing a piston rod from being broken, which achieves symmetrical supporting and limiting of the piston rod through the arrangement of a supporting plate, a connecting rod, a vertical plate and a piston rod limiting assembly, effectively disperses stress borne by the piston rod and improves the service life of the piston rod. And the stability and the fracture resistance are improved.

The utility model belongs to the technical field of grease guns, and particularly relates to a grease pumping device of a grease gun, which comprises a mounting sleeve capable of being arranged in a grease gun barrel, a piston piece slidably arranged in the mounting sleeve and a fixing component used for fixing the mounting sleeve in the grease gun barrel. The piston piece comprises a piston rod arranged in the mounting sleeve and a piston arranged on the piston rod, the piston can be attached to the inner wall of the grease gun barrel, a threaded rod is rotationally arranged in the mounting sleeve, a threaded hole matched with the threaded rod is formed in the piston rod, the threaded rod penetrates through the threaded hole, and a driving end is arranged at the rear end of the threaded rod; the driving end is controlled to rotate to drive the piston rod and the piston to move back and forth along the threaded rod through the threaded rod, the grease pumping device is simple in structure, grease is pumped into the grease gun barrel through a screw transmission structure, and therefore the efficient and labor-saving effects are achieved. And some users with small arm strength can finish the grease pumping work of the grease gun barrel at one time, so that the working efficiency is improved.

This invention discloses a hydraulic cylinder piston rod blank, including a cylinder body. An annular groove is formed on the end face of the cylinder body, and a connecting sleeve is inserted into the annular groove. A guide assembly is fixedly connected to the end of the connecting sleeve. The guide assembly includes a cover, which is fixedly connected to the end face of the connecting sleeve. A turntable is fixedly connected to the outer wall of the cover. A through hole is formed on the surface of the cover, and a limiting groove is formed inside the through hole. This hydraulic cylinder piston rod blank, through the cooperation of the protrusion and the limiting groove, fixes the dustproof oil seal, preventing it from moving. Simultaneously, a limiting slider on the inner wall of the dustproof oil seal limits the sliding groove formed on the side wall of the rod. The connecting sleeve and cylinder body are fixedly connected together by fastening bolts, thereby preventing the cover from rotating or falling off, preventing the piston rod from rotating, and improving the stability of the piston rod after reciprocating motion.

The present invention discloses an integrated jack and a push-up device, the jack includes an outer frame body and a jack body, the jack body includes a cylinder body, a piston rod and a piston, the outer frame body includes a rectangular parallelepiped frame, the rectangular parallelepiped frame is sleeved outside the cylinder body, and the cylinder body is fixedly connected to the rectangular parallelepiped frame through a connecting component; the outer frame body also includes a plurality of positioning docking components, the positioning docking components include a vertically arranged slot and a vertical plug rod adapted to the slot, the slot and the vertical plug rod are arranged in a one-to-one correspondence, the slot is fixedly installed on one of the horizontally arranged surfaces of the rectangular parallelepiped frame, the vertical plug rod is fixedly installed on another horizontally arranged surface of the rectangular parallelepiped frame, and the central axis of the vertical plug rod and the slot is located on the same vertical straight line. The jack adopts this structure to conveniently realize the precise positioning and combined assembly of multiple jacks to form a push-up device, so as to increase the thrust of the push-up device by superimposing the jacks, thereby improving the assembly efficiency of the device.

Provided is a plated member having, on an outer surface, a plated film composed mainly of chromium formed by using a trivalent chromium bath containing at least chromium, carbon, and oxygen, the plated film containing 60 at% or more of chromium and 1 at% to 30 at% of carbon, and having, on the outer surface, an indentation hardness of 11.1 GPa or more, and a degree of crystallinity calculated from a ratio of the integrated peak intensity of a measured value of an X-ray diffraction measurement and the following expression (1) is 5% or more. Degree of crystallinity (ratio of integrated peak intensity) = {(crystalline) / (crystalline + amorphous)} × 100% Here, the indentation hardness refers to a value obtained by instrumented indentation hardness measurement using a nanoindentation method (ISO 14577), and the integrated intensity ratio in expression (1) refers to a value determined in X-ray diffraction (XRD) analysis under conditions of 2θ: 30° to 60°, a half-width of crystalline: < 3, and a half-width of amorphous: ≥ 3.

The utility model discloses a double-spliced piston with stable flow, which comprises a fixed ring, one side of the fixed ring is rotatably connected with a rotating rod, one end of the rotating rod is fixedly connected with a first connecting piece, one side of the first connecting piece is rotatably connected with a rotating ring, one end of the rotating ring is rotatably connected with a second connecting piece, and the second connecting piece is fixedly connected with a second connecting piece. A fixing rod is fixedly connected to the interior of the rotating ring, a rotating piece is slidably connected to the outer wall of the fixing rod, a positioning wheel is slidably connected to the side wall of the rotating piece in an attached mode, a rotating shaft is rotatably connected to the middle of the positioning wheel, and one end of the rotating shaft is fixedly connected to the inner wall of the rotating ring; the outer wall of the rotating ring is slidably connected with a moving piece. According to the utility model, the rotating sheet is arranged, and the rotating balance force generated by the rotation of the rotating sheet can assist the rotating ring to keep stable during rotation, so that the friction of the piston is prevented from being aggravated, the abrasion of the piston is slowed down, the service life of the piston is prolonged, and the flow stability of the piston is ensured.

A novel piston rod comprises a piston rod body, a mounting rod I and a mounting rod II, and the mounting rod I and the mounting rod II are connected to the two ends of the piston rod body through threads respectively. The butt joint rod I is connected to the mounting rod II through threads, a plurality of clamping holes and clamping balls are arranged on the inner wall of the butt joint rod I, and the clamping balls are mounted in the clamping holes; the sliding ring is mounted outside the butt joint rod I in a sliding manner; and the return spring is arranged outside the butt joint rod I in a sleeving mode, and the two ends of the return spring are connected with the sliding ring and the butt joint rod I correspondingly. The novel piston rod adopts a modular splicing design, so that the piston rod can be spliced into different lengths according to actual requirements on the premise that the original structure is not changed, the diversified requirements in actual application are better met, and the flexibility and adaptability of equipment use are improved.

The invention provides a rolling mill AGC oil cylinder piston rod end gasket and a design method of the rolling mill AGC oil cylinder piston rod end gasket, and belongs to the technical field of strip steel rolling. And after internal gaps are eliminated and integral design is adopted, spare parts are unified, and the temperature of the backup roller bearing is prevented from rising under the action of long-term super-strong rolling force, so that the service life of the backup roller is prolonged, the uniformity of the spare parts is improved, the cost is reduced, and the production requirements are met under the action of the long-term super-strong rolling force.

The invention discloses a gas-liquid cylinder which comprises a cylinder body, a piston is arranged in the cylinder body, a piston rod with the end extending out of the cylinder body is connected to the piston, a gas chamber and an oil chamber are correspondingly formed in the two sides of the piston in the cylinder body respectively, a gas channel communicated with the gas chamber is formed in the cylinder body, and the oil chamber is communicated with the gas channel. The cylinder body is further provided with an independent oil inlet and an independent oil outlet which are communicated with the oil chamber, and a switch valve is arranged at the oil outlet. When the piston rod extends outwards, the switching valve is closed to close the oil outlet, hydraulic oil is input into the oil chamber from the oil inlet, and gas in the gas chamber is compressed to form pre-pressure; and when the piston rod resets, the switching valve is opened to open the oil outlet, and the hydraulic oil in the oil chamber is discharged from the oil outlet. The reset mechanism has the advantages of being reasonable in structure and high in reset speed.

The invention provides modulation-free steel for a piston rod, and relates to the technical field of structural alloy steel, and the steel comprises the following components: 0.18 to 0.25 percent of C, 0.20 to 0.45 percent of Si, 1.20 to 1.60 percent of Mn, less than or equal to 0.025 percent of P, less than or equal to 0.015 percent of S, 0.08 to 0.15 percent of V, 0.02 to 0.06 percent of Nb, 0.30 to 0.50 percent of Cu, 0.20 to 0.35 percent of Ni and the balance of Fe. According to the modulation-free steel for the piston rod, the process is simplified, and energy consumption is reduced; the mechanical property is improved; the corrosion resistance is optimized; the fatigue life is prolonged.

The invention relates to a piston rod (1) comprising a metallic piston rod base body (2) and a first coating (3) applied to a surface of the piston rod base body (2) in a coating area (B) by means of galvanic deposition, which - is formed by a tin-nickel alloy, wherein non-metallic particles in the form of graphite and / or molybdenum disulfide and / or titanium carbide and / or tungsten carbide and / or diamond are optionally incorporated in the tin-nickel alloy, or - is formed by a zinc alloy, which in turn is coated with a lubricating varnish (4). The invention further relates to a use of such a piston rod (1).

The utility model relates to the technical field of hydraulic oil cylinders, in particular to a gas-liquid mixed pressure type energy-saving oil cylinder which comprises a mixing cylinder and a base, the lower end of the mixing cylinder is fixedly connected with the base, an end cover is installed at the end of the mixing cylinder, the inner wall of the end cover is fixedly connected with a sealing sleeve, and the upper end of the sealing sleeve is fixedly connected with a dustproof ring. The inner wall of the sealing sleeve is connected with an auxiliary mechanism. By controlling hydraulic oil injected or discharged outwards from the same oil valves at the upper end and the lower end of the mixing cylinder, the piston rod freely stretches out and draws back in the mixing cylinder when being pushed, the inflation valve injects and discharges different air pressures into and out of the hollow rod, and the hollow rod is sealed by the sealing ring on the inner wall of the piston rod, so that a cavity in the piston rod can push and pull the piston rod; power can be independently provided for different positions of the piston rod in the mixing cylinder through the oil valve and the inflation valve, independent power supply of gas and liquid is achieved, use of different object strengths is improved, and different energy-saving effects are achieved.

The utility model relates to a kind of hydraulic control check valve and its valve core subassembly for hydraulic support stand column, valve core subassembly includes screw plug, screw shell, connecting sleeve and screw sleeve, first compression sleeve and second compression sleeve embedded in screw shell;The inner peripheral wall of screw shell has protruding part;First compression sleeve is arranged between protruding part and screw plug, and second compression sleeve is arranged between protruding part and connecting sleeve;Valve stem includes stem end and stem body part;Stem end is slidably connected with the protruding part of screw shell;Left side of stem end is formed as first sealing part, and right side is formed as second sealing part;Valve stem has initial position and right limit position, when initial position, first sealing part and first compression sleeve form first sealing fit;When right limit position, second sealing part and second compression sleeve form second sealing fit, and the sealing effect between valve stem and valve body is enhanced, the stability of the pressure that maintains valve stem in two positions is guaranteed, ensure the stability of one-way valve two-stage unloading process.

The invention relates to the technical field of ocean engineering equipment, and discloses a pile turning oil cylinder for ocean engineering, equipment of the pile turning oil cylinder and a pile turning method. When clamping is needed, a piston rod stretches out, a hydraulic system supplies hydraulic oil to a second oil port of the oil cylinder, the hydraulic oil flows into a rodless cavity through a rodless pipeline, the pressure of the rodless cavity is gradually increased, namely, the output force is increased; when the output force is greater than the loading force, the piston rod extends out, and the rod cavity hydraulic oil flows back to the oil tank through the rod pipeline and the first oil port; the movable joint is driven to stretch upwards, so that the claw body rotates around the base to drive the clamping claw to open and close to clamp a target pile body; after clamping is completed, the piston rod retracts, the hydraulic system supplies hydraulic oil to the first oil port of the oil cylinder, the hydraulic oil flows into the rod cavity through the rod pipeline, the pressure of the rod cavity is gradually increased, namely, the output force is increased, and when the output force is larger than the loading force, the piston rod retracts, and at the moment, the hydraulic oil in the rod cavity flows back to the oil tank through the rodless pipeline and the second oil port.

The utility model discloses a hollow piston rod which comprises an oil cylinder and a piston rod, the piston rod comprises a piston rod body and a piston rod head, and the piston rod head is connected to one end of the piston rod body. The piston rod body is provided with a connecting rod at the other end of the piston rod head, the piston rod body is hollow in the axial direction, and two oil pipes are arranged to be communicated with the piston rod head and the connecting rod. The piston rod is subjected to hollow treatment, a traditional oil way is replaced by welding of the two oil pipes at the hollow portion, and the novel piston rod formed by welding of the oil inlet structure, the oil passing structure and the oil outlet structure is formed. Meanwhile, due to the fact that the oil way is arranged in the piston rod, the design of an oil nozzle can be omitted when the oil cylinder is machined, the machining technology of the oil cylinder is simplified, and the space utilization rate is increased.

Adjustable connecting rod device (1) for an internal combustion engine with adjustable compression ratio, comprising: a connecting rod (3) with a connecting rod eye (5) which has, at least in sections, a circumferentially varying connecting rod eye bearing width (a) with a maximum connecting rod eye bearing width (a) extending circumferentially along a connecting rod eye angle section (α) max ), wherein the connecting rod eye angle section (α) is spanned between a first trapezoidal attachment point (28) of the connecting rod eye (5) and a second trapezoidal attachment point (29) of the connecting rod eye (5); an eccentric device (10) which is accommodated at least in sections in the connecting rod eye (5) and is adjustable relative thereto, which has an eccentric device bearing width (b) which is assigned to the connecting rod eye bearing width (a) and which varies at least in sections circumferentially, with a maximum eccentric device bearing width (b) which extends circumferentially along an eccentric device angle section (β) max ), wherein the eccentric device angle section (β) is spanned between a first trapezoidal attachment point (36) of the eccentric device (10) and a second trapezoidal attachment point (37) of the eccentric device (10); wherein the varying connecting rod eye bearing width (a) of the connecting rod eye (5) is interrupted over a width (c) by an adjusting body (12) of the eccentric device (10); wherein the eccentric device angle section (β) is provided larger than the connecting rod eye angle section (α), and wherein the eccentric device angle section (β) is selected such that, when the eccentric device (10) is adjusted to end positions of a maximum effective connecting rod length (l eff_max ) or a minimum effective connecting rod length (l eff_min ) always completely covers the connecting rod eye angle section (α).

A piston assembly includes a piston head for reciprocating back and forth within a cylinder of an engine, an upper rod coupled to the piston head at one longitudinal end of the upper rod and fixed relative to the piston head, and a lower rod rotatably coupled to an opposite longitudinal end of the upper rod, the lower rod configured to pivot about the opposite longitudinal end of the upper rod. The lower rod is configured to couple to a crankshaft at a longitudinal end of the lower rod opposite the upper rod. Methods of forming a piston assembly and engines incorporating such piston assemblies are also disclosed.

The invention concerns a sealing arrangement for a reciprocating piston rod of an internal combustion engine, an internal combustion engine and a method for operating an internal combustion engine. The sealing arrangement (10) comprises a stuffing box (11) having a first axial side (12u) which is disposed towards a cylinder (101) and a second axial side (121) which is disposed towards a crankcase (104). The stuffing box (11) comprises an annular rib (14) configured to form a rib surface (15) opposing the surface (105) of the reciprocating rod (103), axially arranged between a first and a second compartment, each housing a fluid-tight ring. The annular rib (14) comprises at least one, preferably radially extending, fluid channel (16), each fluid channel (16) having a first end (17) in fluid communication with the rib surface (15) and / or in fluid communication with the first compartment (36) and / or with the second compartment (37), and a second end (18) fluidly connected or connectable with a first source (19) of pressurized air. Additionally or alternatively the stuffing box (11) comprises at least one nozzle (20), preferably a plurality of circumferentially arranged nozzles (20), arranged at the first axial side (12u) of the stuffing box (11), fluidly connected or connectable with a second source (21) of pressurized air. The nozzle (20) is adapted to provide a, preferably annular, air curtain (32), preferably above the first axial side (12u) of the stuffing box (11).

An assembly includes a conrod (10 Fig. 6), a wrist pin (30 Fig. 6), and a piston 40, and the conrod receiving into its eye (26 Fig. 2b) at the small end (12 Fig. 2b) the wrist pin. Respective ends of

The utility model discloses a piston rod with a lubricating structure, which comprises a sliding rod, a piston threaded connector is fixedly arranged at one end of the sliding rod, a connecting lantern ring is fixedly arranged at the other end of the sliding rod, a fixing ring integrally connected with the sliding rod is fixedly arranged on the outer wall of the other end of the sliding rod, an annular oil cavity is arranged in the fixing ring, and a lubricating oil cavity is arranged in the annular oil cavity. An oil seepage assembly is arranged between the annular oil cavity and the sliding rod. The fixing ring is arranged at the top of the sliding rod, the annular oil cavity is formed in the fixing ring, and the oil seepage assembly is arranged between the annular oil cavity and the sliding rod, so that when the sliding rod slides upwards to be separated from the piston sleeve, the oil seepage assembly seeps oil downwards to lubricate the surface of the sliding rod; the abrasion between the sliding rod and the piston sleeve in the stretching and retracting process is effectively reduced, and the service life is prolonged.

A piston connecting rod mechanism comprises a piston and a connecting rod which are arranged up and down. The connecting rod comprises a vertically-arranged rod body, the upper side of the rod body is in rigid connection with the piston, a connecting rod big head is arranged on the lower side of the rod body and comprises a big head body and a connecting rod cover, the big head body comprises an upper transverse plate, and first extending parts extending downwards are arranged on the left side and the right side of the upper transverse plate respectively. Second extending parts extending upwards are arranged on the left side and the right side of the lower transverse plate respectively, and after the two second extending parts and the two first extending parts are correspondingly matched in an abutting mode, a transversely-arranged long-strip-shaped through hole is formed between the large head body and the connecting rod cover. The upper side of the connecting rod is directly and fixedly connected with the piston, the large end of the connecting rod is elongated, and the piston and the connecting rod integrally linearly move along the axial direction of the cylinder barrel during acting, so that heat efficiency of the engine can be improved, and operation vibration and noise of the engine can be effectively reduced due to the fact that the connecting rod has no oblique impact force on a crankshaft.

The invention relates to a connecting rod, in particular for an engine, comprising a head region, a central region (305), and a foot region. The head region has a first connection with a thickened section for connecting a piston to a connecting rod receiving area of the piston in a rotatable manner about a pivot axis, said connecting rod receiving area having an undercut which corresponds to the thickened section. The foot region has a second connection for receiving a crankshaft, and the head region is connected to the foot region via the central region. The invention additionally relates to a piston, a crank drive, and an internal combustion engine.