304results about "Piston rods" patented technology

Disclosed are crankshaft, single-plate cam and beam mechanisms that provide significant improvements in performance for 2- & 4-stroke engines, compressors and pumps. These cost effective mechanisms include linkages with the new and improved use of pivoting arms that operate with a variety of cylinder arrangements. One embodiment of the crankshaft mechanism has its crankpin roller positioned within a novel yoke-arm. The cam mechanism uses a pair of centrally positioned parallel links that are connected to roller cam followers and single or diametrically-opposed pistons. A pair of laterally extending follower arms connects to the ends of the links to provide support and alignment for the piston rods. Between the reciprocating links, cam followers and follower arms is a rotating odd-lobe plate cam. A beam mechanism uses opposite-direction extending balancing beams that are connected to links, cam followers and piston rods.

A crosshead and connecting rod assembly for a pump comprises a connecting rod which includes a first end that is rotatably connected to the crankshaft of the pump, a second end that comprises a generally cylindrical configuration, and a shaft that extends between the first and second ends. The second end comprises at least one annular shoulder adjacent to the shaft, and the crosshead and connecting rod assembly further comprises a crosshead which includes a body that comprises a generally semi-cylindrical socket within which the second end is rotatably received and at least one trunnion that comprises a generally semi-cylindrical recess which aligns with the socket and within which the shoulder is rotatably received when the trunnion is connected to the body.

The invention provides a multifunctional crown block piston rod. A piston is arranged on a piston rod, the piston rod and the piston are of an integral structure, the piston rod is made of 38CrMoA1A steel, and the production process of the piston rod is as follows: blank-forging-normalizing-rough turning-tempering-semi finish turning-stress relief annealing-grinding-ion nitriding-polishing. The piston rod provided by the invention has high strength and rigidity and good wear resistance and fatigue resistance, so that the problem that the piston rod is easy to be fatigue to break and easy to wear in the early stage can be solved, and the service life of the piston rod is prolonged greatly and can be longer than 18 months.

The present invention relates to a connecting rod and piston pin assembly for an internal combustion engine to improve wear of the piston/connecting rod pivot point and reduce deformation of the pin bore. To this end, the assembly includes a piston having a pin bore, a connecting rod having a bore adapted to be aligned with the piston pin bore and piston pin interconnecting the piston and the connecting rod through engaging their respective bores. The piston pin has a profiled outer circumference that is substantially circular in cross-section with a larger diameter at the distal ends than at the center portion. One end of the connecting rod includes a phosphatized coating and is adapted to facilitate movement between the connecting rod bore and the profiled piston pin.

The invention discloses a composite coating piston rod and a manufacturing method thereof, and relates to the field of air compressor piston rods. The composite coating piston rod has high surface hardness and comprises a piston rod body, a nitriding layer is arranged on the surface of the piston rod body, a composite coating is attached outside the nitriding layer, a metal bottom layer, a hard coating and a solid lubrication surface layer are sequentially arranged on the composite coating from inside to outside, the metal bottom layer is Ti or Cr layer, the hard coating is a metal nitride or metal carbonitride layer, the hardness of the metal nitride or metal carbonitride layer is 20GPa-50GPa, the surface friction coefficient of the metal nitride or metal carbonitride layer is 0.2-0.5, the solid lubrication surface layer is one of a diamond-like carbon coating, a MoS2 layer or WS2 layer, and the hard coating, the solid lubrication surface layer and the metal bottom layer are coated by a vapor deposition method. The manufacturing method can be applied to the air compressor piston rods and other parts with surfaces needing high hardness.

A connecting rod of an internal combustion engine, and an internal combustion engine including the connecting rod, a piston, a crankshaft and a float bearing as main moving parts. A piston is connected to a connecting rod by a spherical joint and has radial ribs on a rear face of a crown part; a connecting rod is of an integrated, one-piece type having integrally a spherical small end part to be connected to the piston and an annular big end part; the crankshaft is of an assembly type, and a float bearing is interposed between the big end part and a crank pin.

The invention provides an integral seal jack. The jack consists of a cylinder body, a piston rod, a piston component and a cylinder port component, wherein the cylinder body consists of a base and a cylinder tube, and the base and the cylinder tube are welded together; the piston rod is a step bar one end of which is provided with a shoulder, and is sleeved in the cylinder tube; and the piston component is sleeved on the piston rod, is positioned by the shoulder of the piston rod, and is fixed on the piston rod through a nut. The integral seal jack is characterized in that the piston component consists of a piston, two piston guide parts and a piston seal component, and is an integral piston; the two piston guide parts are positioned on the front end and the rear end of the piston respectively; the piston seal component is positioned between the two piston guide parts; the piston seal component and the two piston guide parts are integrally cast on the piston; a stainless steel sleeve is welded on the inner wall of the cylinder tube; and a laser cladding layer is arranged on the outer surface of the piston rod. The integral seal jack has the advantages of simple structure, low cost, safety, reliability, good seal performance and low repair rate, and can remarkably improve the corrosion resistance effect of the jack.

The invention discloses a piston rod machining process. The piston rod machining process comprises the working procedures of blank forging, annealing, rough turning, heat treatment quenching and tempering, semi-finish turning, ultrasonic flaw detection, central oil hole boring, key groove milling, pin hole drilling, stable tempering heat treatment, ceramic coating spraying, external grinding, nitriding heat treatment and Sic grinding wheel precision grinding. According to the piston rod machining process, physical characteristics of the surface of a piston rod are changed, and the piston is good in pressure loss resistance and corrosion resistance due to the ceramic coating spraying process added to the piston rod; through the follow-up nitriding heat treatment process, the surface hardness, fatigue resistance and abrasive resistance of the piston rod are improved, and therefore product quality is greatly improved, and production cost is lowered.

The invention discloses a processing technique for a piston rod of a steering cylinder and belongs to the field of a hydraulic cylinder. The processing technique comprises the steps: (1) preparing a material; (2) roughly turning an outer circle; (3) drilling a hole on a milling surface; (4) quenching in super-audio frequency; (5) grinding the outer circle; (6) electroplating; (7) polishing; (8) forming semi-finished products. A quenching layer and an electroplating layer are formed on the surface of the piston rod in double surface hardening modes of super-audio frequency quenching and electroplating; the hardness of the quenching layer is HRC45-55 and the thickness of the quenching layer is 1-1.5mm; the hardness of the electroplating layer is HRC65 and the thickness of the electroplating layer is 0.03-0.05mm; the surface of the piston rod is more wear-resisting and the service life is longer.

The invention discloses a fast die closing oil cylinder used for a high-speed die-casting machine. The fast die closing oil cylinder comprises a die closing cylinder rear cover (1), a die closing cylinder barrel (2), a die closing cylinder front cover (3), a die closing cylinder piston (4), a die closing cylinder piston rod (5), an oil supply hole (6) and an oil return hole (7), wherein the die closing cylinder piston rod (5) is internally provided with a cavity (9) used for a fast piston rod (8) to insert, the fast piston rod (8) is internally provided with a through hole (10) arranged along the axial direction, and the other end of the fast piston rod (8) sequentially penetrates through the die closing cylinder piston (4) and the die closing cylinder rear cover (1) so as to enable the through hole (10) to be communicated with a main oil path of a hydraulic system, so that the hydraulic system can push the die closing cylinder piston rod (5) to move forward by supplying oil into the cavity (9) through the through hole (10). The fast piston rod is arranged in the die closing cylinder piston rod, so that the die closing speed is improved by more than 60 percent, and meanwhile, the die opening speed is improved by increasing the diameter of the die closing cylinder piston rod.

The invention discloses a connecting structure for a piston and a piston rod. The connecting structure mainly comprises the piston rod and the piston sleeved on the piston rod, wherein the piston is in interference fit with the piston rod; the outer wall of the piston is provided with a wear-resistant pad clamping groove and a sealing ring clamping groove; and the piston is provided with a tapered pin hole which passes through the piston rod from one side to the other side and is positioned in the wear-resistant pad clamping groove. The piston is in interference fit with the piston rod according to an expansion and contraction principle of metal, so that the piston and the piston rod are tightly sealed and locked; the tapered pin hole is drilled in the middle of the piston, so that the locking fixing force of the piston is increased, and the piston does not move or drain oil on the piston rod during work; and production benefit is improved, and production cost is reduced.

A wear resistant coating is applied to the thrust surfaces and bore surfaces of a connecting rod. The wear resistant coating includes a polymer matrix, such as polyamide imide (PAI), solid lubricant, and hard particles including Fe₂O₃. The wear resistant coating is typically applied by spraying or rolling. The wear resistant coating adheres well to metal and provides lubrication. Thus, the wear resistant coating can reliably reduce wear, scuff, and seizure along the surfaces of the connecting rod as the piston reciprocates and crank shaft rotates during operation of the internal combustion engine. The likelihood of engine contamination caused by metal shavings from wear of the connecting rod is reduced, and the life of the connecting rod and engine is increased.