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Drive mechanism

A kind of transmission device, primary technology, applied in the direction of fluid pressure actuator, metal processing, servo motor, etc., can solve time-consuming problems and achieve high-strength effects

Inactive Publication Date: 2010-06-30
BOSCH REXROTH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The known solution has the disadvantage that the adjustment of the zero position is time-consuming
In addition, there is the disadvantage that the high strength of the transmission required for punching presses or punching shears cannot be achieved with the known force converters

Method used

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Embodiment Construction

[0019] figure 1 A preferred transmission device 2 according to the invention is shown, in particular for the transmission of punching machines or punching shears, with a force converter 4, a spindle drive 6 and a preload for the force converter 4 The preloading device 8.

[0020] The force transducer 4 has a primary unit 10 and a secondary unit 12 . The two units 10 , 12 each have a primary or secondary piston 14 , 16 which is accommodated in a cylinder block housing 18 , 20 and is designed as a differential piston. The pistons 14 , 16 each have a piston rod 22 , 24 , which extend through the cylinder block housing 18 , 20 from the end side. Acting on the piston rod 22 of the primary unit 10 is a screw 26 which is in active engagement with a screw nut 68 of the spindle drive 6 for driving the force converter 4 . The piston 24 of the secondary unit 12 can, for example, come into direct or indirect contact with a workpiece to be processed (not shown), so that it can exert a h...

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PUM

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Abstract

Disclosed is a drive mechanism, particularly for punching machines and nibbling machines, comprising a hydraulic force transmitting element (4) and a spindle drive (26) for driving the force transmitting element. A biasing mechanism (8) is provided for biasing the force transmitting element (4).

Description

technical field [0001] The invention relates to a transmission device. Background technique [0002] Such electro-hydraulic transmissions are used in work machines in which fast adjusting movements and high forces can be achieved. Preferred working machines are punches, punch shears, presses and plastic injection molding machines. [0003] A transmission for a plastics injection molding machine is disclosed in DE 101 35 516 A1 by the applicant. The transmission has a hydraulic pressure transducer which is connected via a high-pressure line to the hydraulic adjustment of the formed extrusion plate. The force transducer has a primary piston-cylinder unit with a small primary piston and a large secondary piston and a secondary piston-cylinder unit. The two piston-cylinder units are arranged nested within one another, wherein the primary piston is actuated by an electric spindle drive and thus can actuate the profiled extrusion plate. In order to adjust the zero position of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B11/032B29C45/82B26D5/12F15B7/00
CPCF15B2211/411F15B2211/76F15B2211/7055F15B2211/41536B26D5/12F15B2211/30505B29C2045/824B29C45/82F15B7/00F15B2211/20553F15B11/032F15B2211/212F15B2211/40515
Inventor 约尔格·丹托格雷贝尔
Owner BOSCH REXROTH AG
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