342 results about "Gudgeon pin" patented technology

The invention discloses a vacuum chuck manipulator paw which comprises a piston, a piston rod, a pipe connector I, a front cylinder cover, a sleeve, a push-pull rod, a push-pull rod head, more than three knuckles, a connecting rod, a chuck sliding groove, a rear cylinder cover, a cylinder, a relaxation spring, a connecting seat, a hinge, a hinge shaft, a knuckle shaft, a mounting seat, a movable hand rack, a vacuum chuck, a return spring, a spring, a connecting ring, a sleeve connecting seat, a piston rod fixing plate, a piston pin, a disc spring slice group, a friction plate, a movable hand rack pin, a spring stopper, a stopper locking nut, a piston nut, a pressing plate, a sealing ring, a seal ring, a connecting rod fixing plate and a pipe connector II. When the cylinder charges air or discharges air, the push-pull rod is driven to move downwards or upwards, the manipulator paw opens or shrinks, the return spring is compressed or rebounds along with the manipulator paw, so that the chuck horizontally slides on an X plane and a Y plane and vertically moves in a Z direction and is matched with an external big arm to move, blocks with different sizes can be caught and taken, and the requirements of actual production are met.

The invention relates to an oil supply for an internal combustion engine, comprising an oil supply device for the supply of oil to a piston, reciprocating in a cylinder. The oil supply device is embodied such that at least at a point at which the piston is in the region of bottom dead centre, oil is introduced directly into a region below the piston, by means of the oil supply device, in particular, beneath the piston crown and within the piston skirt. The oil supply device thus comprises at least one tube element, extending into a region beneath the piston crown. The tube element terminates as close as possible to a gudgeon pin, when the piston is at bottom dead centre. A targeted lubrication of the mechanically and thermally highly loaded gudgeon pin can thus be guaranteed. It is also possible by means of the oil supply to supply transfer ports of a two-stroke engine with oil, counteracting a tendency to coke up.

The invention provides an assembly mechanism for a clamp ring of an engine gudgeon pin. A press mounting guide pillar (3) is of a rod-like structure; one end of the press mounting guide pillar (3) is connected with a telescopic rod member (4); a clamp ring press head (2) is set into a hollow cylindrical structure; a press head cavity (5) is arranged in the middle of the clamp ring press head (2); an open slot (6) is arranged at the upper end of the clamp ring press head (2); the telescopic rod member (4) can penetrate through the clamp ring press head (2); a fixing frame (8) for fixing a piston (7) is arranged at the front end of the clamp ring press head (2); when the piston (7) is fixed on the fixing frame (8), a piston pin hole (9) and the press mounting guide pillar (3) are positioned on the same straight line; the press mounting guide pillar (3) can extend forwards to the interior of the piston pin hole (9); and a press mounting device (1) is connected with a controller (10) for controlling the press mounting device (1) to work. According to the assembly mechanism for the clamp ring of the engine gudgeon pin, which is provided by the invention, the risk that the clamp ring is easily bounded to injure people during manual assembly can be avoided and the function of protecting assemble workers is achieved.

A roller shade is disclosed having a counterbalancing assembly with an optimally pretensioned spring that lowers the torque load on the motor of the roller shade throughout the rolling up or rolling down cycles. The roller shade comprises a roller tube, a gudgeon pin having a first stop, a gudgeon body having a through bore and rotatably connected about the gudgeon pin and operably connected to the roller tube, a limit nut operably connected to the gudgeon body and adapted to axially travel along the gudgeon pin within the through bore, a spring, a first spring carrier connected to the first end of the spring and operably connected to the gudgeon pin, and a second spring carrier connected to the second end of the spring and operably connected to the roller tube. The spring is pretensioned and the limit nut abuts the first stop thereby locking the pretension. Rotation of the roller tube to roll down the shade further tensions the spring, and rotation of the roller tube to roll up the shade releases the tension in the spring.

A two-cycle, opposed piston engine with side-mounted crankshafts and cylinders isolated from mechanical stresses of the engine includes tailored cooling of cylinders and symmetrical cooling of the interior surfaces of piston crowns. Each opposed piston includes a compliant member that permits movement of an axially-centered rod mounted in the piston in order to maintain axial alignment with the bore of a cylinder in which the piston is disposed during engine operation. A single wristpin is disposed externally of the piston to connect the piston with connecting rods that run between the piston and the crankshafts.

The invention relates to a friction wearing part test apparatus for a connecting rod small end bushing of an engine. The apparatus comprises a body (1), a bearing cover (2), a crankshaft (3), a connecting rod (4), a cylinder sleeve (5), a test piston (6), a piston pin (7) and a small end bushing (8). The crankshaft (3) performs rotary motion in a bearing structure composed of the body (1) and the bearing cover (2). The crankshaft (3) and the connecting rod (4) are connected, the connecting rod (4) is connected with the test piston (6) through the piston pin (7), the contact portion of the connecting rod (4) and the piston pin (7) is provided with the small end bushing (8), and the rotary motion of the crankshaft (3) drives the test piston (8) to perform up-and-down motion in the cylinder sleeve (5). The apparatus further comprises a support rod (9), a spring limiting disc (10), a motion disc (11) and a spring set (12). Compared to a whole machine test, the apparatus can reduce the cost for endurance testing of a connecting rod small end bushing.

The invention discloses a high-hardness wear-resistant piston pin and a preparation method thereof. The preparation method comprises the following steps of firstly, respectively mixing matrix material powder and Co-Cr-W alloy powder with a binder, and performing granulation to obtain a matrix material feed and a high-hardness wear-resistant coating material feed; then, sequentially injecting the matrix material feed and the Co-Cr-W alloy coating material feed into a mold cavity by using an injection molding technology to obtain a product green body; removing the binder in the green body through catalytic debinding and thermal debinding processes; and finally, performing co-sintering densification to obtain the Co-Cr-W series high-hardness wear-resistant piston pin. The process is simple, the bonding performance of a coating layer and a matrix is good, and the piston pin has the characteristics of high hardness and wear resistance.

The invention discloses a motorcycle engine connecting rod and its manufacturing process. The engine connecting rod has a rod body, a large head and a small head are respectively arranged at two ends of the rod body, and a crank pin mounting hole is arranged on the large head. A piston pin installation hole is provided on the small head, and a copper layer is plated on the surface of the shaft, the large head and the small head, and the thickness L of the copper layer is 0.05mm-0.09mm. The manufacturing process of the engine connecting rod is: 1) blanking; 2) forging blank; 3) normalizing treatment; 4) shot blasting treatment; 5) carburizing and quenching treatment; 6) copper plating treatment; 7) machining out Crank pin mounting holes and piston pin mounting holes. The invention delays the surface oxidation process of the connecting rod by increasing the copper plating treatment, reduces the chance of cracks, and improves the service life of the invention; it has the characteristics of easy realization, low cost, long life and light weight.

The invention provides a piston-typed engine without crankshaft, moment dead point, or time delay ignition, mainly comprising a cylinder body, a piston, a piston pin, a non-round internal gear, a mainshaft gear, a mainshaft, a cam, a cam roller, etc. When the piston supplies work, the piston pushes the non-round internal gear to move and pushes the mainshaft gear engaged with the non-round internal gear to rotate, and the power is output from the mainshaft; meanwhile, the other mainshaft gears are driven to drive respective non-round gear engaged with the mainshaft gear to move, in order to implement the working cycles of each cylinder of sucking, pressing, bursting, and discharging. As the thrust force of the non-round internal gear is always tangent to a reference circle of the mainshaft gear and the torque is not changed with the rotation angle of the mainshaft gear, the output torque of the mainshaft is improved to the most extent, the torque of the crankshaft is avoided to be changed with the rotation angle of the crankshaft, the work loss caused by moment dead point and time delay ignition are avoided; the conversion rate of the power can theoretically reach 100%; the output torque, the output power of the mainshaft and the power performance of the engine are greatly improved, and the fuel consumption and pollution discharge are reduced by more than a half.

The invention discloses a machine for automatically assembling a connecting rod, a piston pin and a retainer ring. The machine comprises a workbench, wherein a piston pin press-assembly line, a retainer ring press-assembly line and a finished product temporary storage line are sequentially arranged on the workbench in parallel; a material taking and unloading grab assembly is arranged among the piston pin press-assembly line, the retainer ring press-assembly line and the finished product temporary storage line, and provided with a material taking grab and a material unloading grab; the material taking grab and the material unloading grab are connected with the same movable auxiliary plate; the piston pin press-assembly line is provided with a piston positioning seat A; the retainer ring press-assembly line is provided with a piston positioning seat B; the finished product temporary storage line comprises a base plate C and a storage table movably arranged on the base plate C; and the storage table is provided with at least one piston positioning groove and slides along the length direction of the base plate C so that the piston positioning groove can be collinear with the piston positioning seat A and the piston positioning seat B. According to the scheme, the overall layout structure is compact, the occupied space is greatly reduced, parts are simplified, the mechanism is optimized, the assembly efficiency is improved, meanwhile, the cost is reduced, and the system operation reliability is guaranteed.

The invention discloses a spatial flying net synchronous launching device which comprises an igniter, an exploder, a main piston, a guide pin, a seal ring, four auxiliary piston sleeves, four auxiliary pistons, a shearing pin, a main piston guide sleeve and connecting rods. The four auxiliary pistons are pushed by the main piston, in the initial stage, the main piston pushes the auxiliary pistons to cut off the shearing pin through mechanical contact, the main piston continues to move to allow the seal ring to lose sealing effect, high-pressure fuel gas directly acts on the auxiliary pistons, each auxiliary piston pushes the corresponding connecting rod and the mass block fixedly connected with the connecting rod, so that launching of multiple mass blocks is achieved, launching synchronism of the mass blocks is achieved, launching speed is increased by utilizing the high-pressure fuel gas, and high safety is achieved.

The invention discloses a piston oil-return structure of a horizontal opposed piston two-stroke internal combustion machine. The piston oil-return structure comprises two gas rings at the head part of a piston and a piston pin hole (1), a third gas ring (2) and an oil ring (3) which are arranged in sequence from top to bottom; more than two oil return holes (4) are uniformly formed in the circumference of the bottom of an annular channel of the oil ring (3); more than two oil return holes (5) are uniformly formed in the outer circumference of a piston below the third gas ring (2); inner hole openings of the two groups of oil return holes are communicated with a crankshaft box; 8 oil return holes (4) are formed and have the aperture of being 2.5mm respectively; 8 oil return holes (5) are formed and have the aperture of being 1.5mm respectively; and the respective 8 oil return holes of two groups are respectively arranged in a staggered and symmetrical manner. According to the piston oil-return structure, the third gas ring and the oil ring can seal gas and also can sweep off a part of engine oil on the inner wall of a cylinder bushing; and the piston oil-return structure overcomes the defect of difficulty in oil return of a horizontal piston and has the remarkable effect in terms of engine oil consumption of the horizontal opposed two-stroke internal combustion machine.

The invention discloses an engine piston mechanism which comprises a piston head, a piston pin seat fixedly connected to the end surface of the piston head, and a piston skirt part arranged at the periphery of the piston pin seat, wherein the piston skirt part comprises two support parts and a roller column; the two support parts are fixedly connected to the end surface of the piston head and are symmetrically arranged at the two sides of the piston pin seat along the axial direction of the piston pin seat; and the roller column is fixedly connected to the support parts and is contacted with the wall of a cylinder in a rolling way when a piston makes reciprocating motion. The invention also discloses a machining method of the engine piston mechanism, and an engine and an automobile which are respectively provided with the engine piston mechanism. According to the engine piston mechanism, the piston skirt part and the wall of the piston are in rolling friction, so that the frictional loss of the piston skirt part and the wall of the cylinder can be reduced, and the fuel economy is improved. The engine piston mechanism is suitable for various automobile engines, and is further applied to various automobiles.

The invention discloses a pressing and disassembling device for engine gudgeon pins. The device comprises a pin falling tank and a connecting pin oil immersion tank component. The device is characterized by further comprising a support frame component, a pin pressing mechanism and a pin disassembling mechanism. By the device, assembling of piston and connecting rod assemblies can be completed efficiently, and the piston and connecting rod assemblies unqualified in assembling can be disassembled in time; in addition, type stoppers of the piston and connecting rod assemblies are added to the device, assembling and disassembling of the piston and connecting rod assemblies of two different types can be completed, and the device has the advantages of high mechanical automation, high safety and the like; meanwhile, compared with the prior art, the pressing and disassembling device is simple in structure, convenient to operate and high in reliability.

The invention discloses a high temperature-resistant light aluminum alloy piston for internal combustion engines and a preparation method thereof. A groove for forming a part of a combustion chamber is formed in the top of the high temperature-resistant light aluminum alloy piston; and the top surface of the high temperature-resistant light aluminum alloy piston and the groove undergo surface treatment by adoption of a high-voltage micro-arc oxidation surface treatment process so as to form ceramic membranes with thicknesses of 70-160 microns. The high temperature-resistant light aluminum alloy piston is capable of solving the negative influences such as large movement inertia, large piston pin hole bearing pressure, related kinematic pair frictional wear deterioration and the like causedby relatively high steel piston density, and solving the problem that the Al2O3 oxide films generated by the anodized illuminant alloy pistons are insufficient in thickness and weak in heat resistance.

The invention discloses a material and method for manufacturing a piston. The piston is made of the carbon fiber reinforced aluminum matrix composite material. The method for the piston comprises the manufacturing steps that 1, a piston pin hole is drilled; 2, pin seat pits on the two sides are milled; 3, an outer circle, a ring groove, a skirt part and an end face are roughly turned; 4, a spigot is roughly turned and located; 5, an oil return tank is milled; 6, the piston pin hole is reamed; 7, a pin seat oil hole is drilled; 8, burrs are removed; 9, the piston pin hole is subjected to rough boring and fine boring; 10, the inner side of the pin hole is chamfered; 12, the spigot is subjected to finish turning; 13, the outer circle, the ring groove, a ring bank and a chamfer are turned; 14, the piston pin hole is rolled and extruded; 15, burrs are removed; 16, the piston is cleaned and blown down; and 17, final inspection is carried out. According to the method for manufacturing the carbon fiber reinforced aluminum matrix composite material, the process is simple, and cost is low; and the piston manufacturing technology is simple and reasonable in process, no toxic and harmful substance is generated in the manufacturing process, and the material and method are suitable for being popularized in various piston production industries.