Cylinder Piston
Method for producing a connecting rod for a radial piston motor
A connecting rod for a radial piston motor including a spherical surface portion, a rod portion and a pad portion having a sliding surface. The spherical surface portion, rod portion and pad portion are formed integrally, and the sliding surface has a bearing alloy attached to its surface by centrifugal casting.
An overlay may be provided on the bearing alloy. The connecting rod is produced in a mass production basis by a method including the steps of integrally forming a star-shape cylindrical monolithic blank having a single cylindrical centrally located axial opening and bearing six equally spaced outwardly radiating rod portions, each rod portion bearing an integral, substantially spherical surface portion on its distal end; attaching a bearing alloy by centrifugal casting, to the centrally located axial opening in said blank; machining the surface of the bearing alloy; and dividing the blank into six pieces constituting six connecting rods. The machined surface of the bearing alloy may be provided with an overlay, such as a Pb-base alloy.
This invention relates to a connecting rod including a spherical surface portion, a rod portion and a pad portion for a radial piston motor suitable for use with watercraft, concrete mixers, etc., and a method of producing same.
This type of connecting rod has hitherto been produced, as shown in FIG. 1, by first forming a spherical surface portion 1, a rod portion 2 and a pad portion 3 having a sliding surface 5 integrally with one another (to provide a blank 4) as by alost-wax precision casting process, and then applying a lining of white metal bearing alloy to the sliding surface 5 (of arcuate shape as shown in FIG. 3 et seq.) of the pad portion 3 by pouring molten alloy thereon. Owing to the complex shape of theconnecting rod, a casting process used for applying a white metal bearing alloy becomes complex in construction, thereby increasing cost and making it difficult to obtain a bearing alloy of highly compact and uniform structure because difficulties areencountered in effecting uniform cooling which is one of the conditions for casting that should be met. Thus a bearing alloy having a lining applied thereto by pouring molten alloy, such as molten white metal bearing alloy, on the sliding surface of thepad portion has tended to have segregated thereon acicular crystals (Cu6 Sn5) and cubic crystals (SbSn), which are hard and bittle intermetallic compounds, and to have coarse crystals formed thereon.
Before and after the blank 4 has a lining applied to the sliding surface 5 of the pad portion 3 by pouring molten alloy thereon, the blank is machined individually to have its inner diameter finished. This has made it necessary to use amachining and holding device of a complex shape. Thus the time required for machining such workpiece has been long and no stability has ever been obtained in the precision with which the workpiece is finished. When an overlay is applied to the bearingalloy as required, each workpiece has to be treated individually, and this has made it necessary to use an expensive device of complex construction and perform a time-consuming operation. Yet it has hitherto been difficult to provide an overlay ofuniform thickness.
From the foregoing description, it will be appreciated that the method for producing a connecting rod according to the invention offers the advantage that the connecting rods can be produced on a mass production basis, and that the connectingrods produced by the method according to the invention is better in quality than connecting rods of the prior art.
In a radial piston motor transmission the deep diving or entering piston shoe is utilized and swingably borne in the pivot-bed of the radially reciprocating piston.Since deep diving piston shoes have large piston strokes, the shoes pivot in the pistons in large angles.Thereby a considerable force-portion of the load on the piston is transfered to the wall between the piston and the cylinder, whereby heretofore short pistons produced occasionally welding and sticking between the cylinder wall and the piston wall.The piston therefore receives radially extending portions, which may extend beyond the medial portions of the piston show and may even enter into the ring groove of the piston stroke actuator ring. Thereby a very long guidance of the piston on cylinder wall portions is obtained, which makes the application of effective pressure balancing pockets at correct location between piston wall and cylinder wall possible. An extended piston guide and friction–less travel of the piston in the cylinder without wearing or sticking is assured.
This invention has been developed for the purpose of obviating the aforesaid disadvantages of the radial piston motor art. Accordingly, the invention has as its object the provision of a connecting rod for a radial piston motor and a method of producing samewhich has the features and offers the advantages that are set forth hereinafter.
About the Author
Zhongyi Hydraulic Motor Company is a professional engaged in radial piston motor,axial piston motor,slewing transmission,danfoss motor,hydraulic orbital motor,hydraulic steering unit. All products are strictly tested before delivery by testing bench and comprehensive testing facilities to ensure the quality.
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Wiseco Piston Kit 1991-1995 Kawasaki ZX750 and Cylinders 13:1 stock bore R736 $0.01 |
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Briggs & Stratton 20HP V-Twin Cylinder Block with Pistons and Rods $0.50 |
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Moto Morini NOS Gilardoni Cylinders Pistons Nikasil Very Rare fits 350 3 1/2 $0.98 |
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HYOSUNG GT 650 GT650 R FRONT CYLINDER WITH PISTON 2005 $0.99 |
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KAWASAKI FRONT BRAKE MASTER CYLINDER PISTON 43020-1123 / 43020-0016 $0.99 |
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KAWASAKI FRONT BRAKE MASTER CYLINDER PISTON 43020-1123 / 43020-0016 $0.99 |
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1996 Suzuki RM 250 cylinder and Piston $0.99 |
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honda 110 atc cylinder head piston engine $0.99 |
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Suzuki LTR 450 Race Cut Cylinder And Piston Set $0.99 |
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79d harley davidson cylinder,piston, head golf cart golfcart amf $0.99 |
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1997 Suzuki DR200 Cylinder Bucket with Piston & Rings NO RESERVE! $0.99 |
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1965 Pontiac 215 6 Cylinder Pistons & Rods $1.00 |
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Kawasaki KX Brake Master Cylinder Kit. Piston & Seal Repair Kit $1.56 |
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Vintage Piston Cylinder Webley BSA Diana $1.56 |
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Harley m-m master cylinder piston ring oem#11111 $2.00 |
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Used Lego Technic Engine Cylinders & Pistons – Yellow $2.50 |
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PARKER PK2502A001 2-1/2″ BUNA PISTON RING KIT CYLINDER $2.50 |
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Bimba Air Cylinder Piston Rod Clevis Pin Mount D-166-1 NEW $2.75 |
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1946 1947 1948 46 47 48 Ford,Mercury NOS master cylinder piston $2.99 |
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Medela Symphony or Lactina Piston Cylinder Spare Part $2.99 |
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Tippmann A5 Cylinder Piston $3.00 |
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NEW SCHRADER BELLOWS A63258020 PISTON SEAL KIT 8IN A2N BUNA CYLINDER PART 50702 $3.00 |
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HONDA 250R TRX250R RATIO RITE MEASURING CUP LID ENGINE CYLINDER MOTOR PISTON OIL $3.25 |
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Maytag Gas Engine Model 72 Piston Wrist Pin Cap Motor Hit & Miss Twin Cylinder $3.50 |
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12mm x 18mm x 8mm Polyurethane Cylinder Piston Oil Seal ODU $3.55 |
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28mm x 22mm x 8mm Polyurethane Cylinder Piston Oil Seal ODU $3.56 |
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12mm x 18mm x 8mm Polyurethane Cylinder Piston Oil Seal ODU $3.56 |
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Cylinder Piston Rod 18mm x 26mm x 8m PU QYd Sealing Gasket Oil Seal $3.57 |
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28mm x 22mm x 8mm Polyurethane Cylinder Piston Oil Seal ODU $3.57 |
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Cylinder Piston Rod 18mm x 26mm x 8m PU QYd Sealing Gasket Oil Seal $3.57 |
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Cylinder Piston Rod 18mm x 26mm x 8m PU QYd Sealing Gasket Oil Seal $3.58 |
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Cylinder Piston USH Black Rubber Gasket Oil Seal 20 x 28 x 5mm $3.60 |
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Cylinder Piston USH Black Rubber Gasket Oil Seal 20 x 28 x 5mm $3.60 |
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Cylinder Piston USH Black Rubber Gasket Oil Seal 20 x 28 x 5mm $3.61 |
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Cylinder Piston USH Black Rubber Gasket Oil Seal 20 x 28 x 5mm $3.62 |
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14mm x 20mm x 8mm Polyurethane Cylinder Piston Oil Seal ODU $3.65 |
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10mm x 16mm x 8mm Polyurethane Cylinder Piston Oil Seal ODU $3.68 |
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22mm x 30mm x 10mm Polyurethane Cylinder Piston Oil Seal ODU $3.68 |
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ODU Blue Polyurethane 50x42x10mm Cylinder Piston Oil Seal $3.69 |
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Cylinder Piston Rod 12 x 20 x 5mm Black Rubber Oil Seal USH $3.74 |
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NBR Pneumatic Air Cylinder Piston Rod Seal 5x8x2.1mm $3.79 |
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22x30x2.8mm NBR Y Type Pneumatic Cylinder Piston Rod Seal Black $3.79 |
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NBR Pneumatic Air Cylinder Piston Rod Seal 12.5×16.5×2.8mm $3.79 |
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NBR Pneumatic Air Cylinder Piston Rod Seal 12x16x2.8mm $3.79 |
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NBR Pneumatic Air Cylinder Piston Rod Seal 14x10x2.8mm $3.79 |
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Black 14x18x2.8mm NBR Pneumatic Air Cylinder Piston Rod Seal MYA $3.79 |
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NBR Pneumatic Air Cylinder Piston Rod Seal 12.5×16.5×2.8mm $3.79 |
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16x20x2.8mm NBR Pneumatic Cylinder Piston Rod Seal Black $3.80 |
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NBR Pneumatic Air Cylinder Piston Rod Seal 12.5×16.5×2.8mm $3.80 |
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22x16x5mm NBR Y Type Air Pneumatic Cylinder Piston Rod Seal Black $3.80 |
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NBR Pneumatic Air Cylinder Piston Rod Seal 12x16x2.8mm $3.81 |
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Black 14x18x2.8mm NBR Pneumatic Air Cylinder Piston Rod Seal MYA $3.81 |
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16x20x2.8mm NBR Pneumatic Cylinder Piston Rod Seal Black $3.81 |
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NBR Pneumatic Air Cylinder Piston Rod Seal 14x10x2.8mm $3.81 |
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22x16x5mm NBR Y Type Air Pneumatic Cylinder Piston Rod Seal Black $3.81 |
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NBR Pneumatic Air Cylinder Piston Rod Seal 14x10x2.8mm $3.82 |
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Black 14x18x2.8mm NBR Pneumatic Air Cylinder Piston Rod Seal MYA $3.82 |
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NBR Pneumatic Air Cylinder Piston Rod Seal 12.5×16.5×2.8mm $3.82 |
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16x20x2.8mm NBR Pneumatic Cylinder Piston Rod Seal Black $3.82 |
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NBR Pneumatic Air Cylinder Piston Rod Seal 5x8x2.1mm $3.82 |
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22x30x2.8mm NBR Y Type Pneumatic Cylinder Piston Rod Seal Black $3.82 |
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15x19x2.8mm NBR Pneumatic Air Cylinder Piston Rod Seal $3.83 |
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15x19x2.8mm NBR Pneumatic Air Cylinder Piston Rod Seal $3.83 |
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NBR Pneumatic Air Cylinder Piston Rod Seal 11.2×15.2×2.8mm $3.83 |
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NBR Pneumatic Air Cylinder Piston Rod Seal 5x8x2.1mm $3.83 |
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NBR Pneumatic Air Cylinder Piston Rod Seal 11.2×15.2×2.8mm $3.83 |
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Black 8x11x2.1mm NBR Pneumatic Air Cylinder Piston Rod Seal MYA $3.83 |
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Black 8x11x2.1mm NBR Pneumatic Air Cylinder Piston Rod Seal MYA $3.83 |
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22x30x2.8mm NBR Y Type Pneumatic Cylinder Piston Rod Seal Black $3.84 |
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22mm x 16mm x 5mm Y Type NBR Air Cylinder Piston Pneumatic Seal $3.89 |
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NBR Air Pneumatic Cylinder Piston Rod Seal Y Type 30x22x2.8mm $3.90 |
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Cylinder Piston Rod 63mm x 77mm x 6mm x 12mm J Polyurethane Dust Seal $3.91 |
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Black 11x15x2.8mm NBR Pneumatic Air Cylinder Piston Rod Seal MYA $3.91 |
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Coffee Color 7x10x2.1mm NBR Pneumatic Cylinder Piston Rod Seal $3.92 |
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Black NBR Pneumatic Cylinder Piston Rod Seal 15x19x2.8mm $3.92 |
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Black 10x13x2.1mm NBR Pneumatic Air Cylinder Piston Rod Seal MYA $3.93 |
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Black 11x15x2.8mm NBR Pneumatic Air Cylinder Piston Rod Seal MYA $3.94 |
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NBR Air Pneumatic Cylinder Piston Rod Seal Y Type 30x22x2.8mm $3.94 |
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NEW CHAINSAW TRIMMER CYLINDER PISTON STOP TOOL $3.94 |
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10x14x2.8mm NBR Pneumatic Cylinder Piston Rod Seal Black $3.95 |
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33cc Piston Rings Zooma Ty Rod Kart G Scooter Kragen Pep Boys 33cc Engine Parts $3.99 |
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Allied Engine Parts Service Manual 1959 26 pages Valves, Pistons, Cylinders more $3.99 |
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12mm x 7mm x 2.2mm Y Type NBR Pneumatic Air Cylinder Piston Seal $4.03 |
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12mm x 8mm x 2mm Y Type NBR Pneumatic Air Cylinder Piston Seal $4.03 |
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7.6x14x7.4mm NBR Y Type Air Pneumatic Cylinder Piston Rod Seal $4.03 |
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20mm x 16mm x 3mm Y Type NBR Pneumatic Air Cylinder Piston Seal $4.04 |
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20mm x 16mm x 3mm Y Type NBR Pneumatic Air Cylinder Piston Seal $4.04 |
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4x9x2.4mm NBR Y Type Air Pneumatic Cylinder Piston Rod Seal $4.04 |
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4x9x2.4mm NBR Y Type Air Pneumatic Cylinder Piston Rod Seal $4.04 |
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16x10x3mm NBR Y Type Air Pneumatic Cylinder Piston Rod Seal Black $4.04 |
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Black 18x22x2.8mm NBR Pneumatic Air Cylinder Piston Rod Seal $4.05 |
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20x14x3.2mm NBR Pneumatic Air Cylinder Piston Rod Seal $4.05 |
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12mm x 7mm x 2.2mm Y Type NBR Pneumatic Air Cylinder Piston Seal $4.05 |
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13mm x 9mm x 2mm Y Type NBR Pneumatic Air Cylinder Piston Seal $4.06 |
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Black 18x22x2.8mm NBR Pneumatic Air Cylinder Piston Rod Seal $4.06 |
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20mm x 16mm x 3mm Y Type NBR Pneumatic Air Cylinder Piston Seal $4.06 |
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Black NBR Pneumatic Cylinder Piston Rod Seal Y Type 10mm x 6mm x 2mm $4.06 |
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Black 20x24x2.8mm NBR Pneumatic Air Cylinder Piston Rod Seal MYA $4.06 |
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Black 20x24x2.8mm NBR Pneumatic Air Cylinder Piston Rod Seal MYA $4.06 |
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21x25x2.8mm NBR Pneumatic Cylinder Piston Rod Seal Black $4.06 |
