A hydraulic electronic control unit HECU 100 comprising a linear actuator LAC 10, a valve support 13 and a sealing gasket 12. The linear actuator comprises a ball screw drive 14 including a spindle 17 and nut 18, and a piston 19 sliding in a piston housing 20. The piston axis is offset from the spindle axis. In a first example (figure 4a), a cylindrical pipe 15 is connected to the nut 18 and the piston 19 connected to the pipe 15, with one nut end 18.2 having its axis aligned with the spindle while the other nut end 18.1 is aligned with the piston. When the spindle is rotated by motor 11 the eccentricity of the nut prevents rotation of the nut and pipe. In a second example (see e.g. figure 8a, 9a), the spindle is eccentrically connected to the piston and the nut is rotated by the motor. When the nut rotates the eccentricity of the piston relative to the spindle prevents rotation of the spindle.
Linear actuator LAC with eccentric piston
2024-01-03
Patent
Electronic Resource
English
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