Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B30—PRESSES
  • B30B—PRESSES IN GENERAL
  • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
  • B30B1/26—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks
  • B30B1/266—Drive systems for the cam, eccentric or crank axis

Definitions

• This invention resolves an arrangement of a crank press drive with an epicyclic gear mounted on one side of a crankshaft and with a flywheel mounted together with a coupling and a brake on the other side of the crankshaft.
• crank press drives have either a single or a multistage gear wheel arrangement positioned in a housing cap or an epicyclic gear that is mounted together with a flywheel on one side of a crankshaft.
• Rotating parts, including the flywheel are moved then to a dynamically disadvantageous upper position where they worsen stability of the press.
• the epicyclic gear arrangement in combination with the flywheel then increases an overall dimension on one side, limits an access to a working space of the press and moves the centroid of the rotating parts further from the axis of the press.
• crank press drive which consists of a crankshaft with an epicyclic gear when on one side of the crankshaft there is a satellite - gear carrier located, with satellites which mate to a crown wheel that is fixed with the housing cap and with a pinion fixed with a shaft of the pinion.
• the shaft of the pinion passes through the crankshaft to its other side where it is mounted in a swivel bearing and connected with a wheel of a subsequent gearing.
• the connection can be either permanent or through a coupling, possibly the shaft is connected through the brake with the bearing of the crankshaft.
• the wheel of the subsequent gearing can be also a flywheel.
• This arrangement reduces a distance of the crankshaft's bearings and also increases its stiffness At the same time it allows to close the upper housing cap as a housing and substantially increase stiffness with the weight reduced
• a high gear ratio of the epicyclic gear allows an arrangement of the gearing without a layshaft, which substantially simplifies the drive's construction
• the drive arrangement with the epicyclic gear mounted on one side of the crankshaft and the flywheel with the coupling and the brake mounted on the other side of the crankshaft in its axis out of the internal space of the upper housing cap allows the distance reduction of the crankshaft ' bearings and closure of the upper housing cap so that while the stiffness is the same the height of the upper housing cap is lowered and the weight reduced
• a direct drive of the crankshaft by the epicyclic gear with the possibility of a higher gear ratio allows to leave out one gearing and thus achieve a substancial simplification of the whole drive
• the above mentioned arrangement also reduces dynamical effects of the drive on the machine's stability
• Figure 1 shows the arrangement of the drive with the epicyclic gear, flywheel, coupling and the brake positioned in the axis of the crankshaft

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Press Drives And Press Lines (AREA)
• Retarders (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=5467419

Family Applications (1)

Country Status (2)

Cited By (1)

Citations (3)

• 1998
  • 1998-11-30 CZ CZ19983907A patent/CZ290365B6/cs not_active IP Right Cessation
• 1999
  • 1999-11-23 WO PCT/CZ1999/000042 patent/WO2000032383A1/en active Application Filing

Patent Citations (3)

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