Speed differential-dependent hydraulic clutch with a control valve

  • US 20040132581A1
  • Filed: 03/05/2004
  • Published: 07/08/2004
  • Est. Priority Date: 04/02/2001
  • Status: Active Grant
First Claim
Patent Images

1. A speed-difference-dependent hydraulic clutch, comprising a drive housing (11), which rotates in a housing (20) that is fixed in space and forms a reservoir for a working fluid, a first shaft (21) which can be connected in a rotationally fixed manner to the drive housing, a second shaft (22) which is connected in a rotationally fixed manner to the drive housing, and furthermore a hydrostatic displacement machine (1), a friction clutch (12) for connecting the first shaft (21) to the drive housing (11) and a piston (10) for acting on the friction clutch (12), which are accommodated in the drive housing, the drive housing (11) having a pressure space (9), and where a pressure is produced in the pressure space (9) when a difference occurs between the speed of the drive housing (11) and that of the second shaft (22), this pressure giving rise to action upon the friction clutch (12), and a passage (13) leading from the pressure space to a control valve (14) which opens up the route to a space of lower pressure in a controlled manner, characterized in that the control valve (14) is arranged in the drive housing (11) and/or, in the second shaft (22), which is connected in a rotationally fixed manner to the drive housing (11), is arranged coaxially with said shaft, and has a control element (52) which can be displaced in the direction of the axis and is actuated by an actuator (59, 61, 62;

  • 74) which is fixed on the housing.

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