Linear Actuator

Patent metadata

Field	Value
Publication number	US-2016258391-A1
Application number	US-201415029181-A
Country	US
Kind code	A1
Filing date	Oct 10, 2014
Priority date	Oct 14, 2013
Publication date	Sep 8, 2016
Grant date	—

Abstract

A linear actuator for driving an actuating element of an internal combustion engine of a motor vehicle has two scanning elements for scanning opposite sides of a guide cam. The guide cam has a protruding rib against which the two scanning elements are pre-tensioned to permit a play-free scan of the guide cam.

First claim

1 - 9 . (canceled)

10 . A linear actuator ( 8 ) for driving an actuator element ( 4 ) for an internal combustion engine of a motor vehicle, comprising:
a rotatable drive shaft ( 12 ); an axially displaceable ram ( 11 ) configured to adjust the actuator element ( 4 ); a guide curve ( 16 ) driven by the rotatable drive shaft ( 12 ); and a guide member ( 18 ) configured to scan the guide curve ( 16 ), wherein the guide member ( 18 ) has first and second scanning bodies ( 19 , 20 ) and the first and second scanning bodies ( 19 , 20 ) are pretensioned against opposite sides of the guide curve ( 16 ).

11 . The linear actuator as claimed in claim 10 , wherein the guide member ( 18 ) has a spring element ( 23 ) for pretensioning the first and second scanning bodies ( 19 , 20 ) towards each other or away from each other.

12 . The linear actuator as claimed in claim 10 , wherein the guide curve ( 16 ) has a protruding rib ( 17 ) and the first and second scanning bodies ( 19 , 20 ) lie against opposite sides of the rib ( 17 ).

13 . The linear actuator as claimed in claim 10 , wherein contact points of the first and second scanning bodies ( 19 , 20 ) on the guide curve ( 16 ) are arranged so as to be aligned with a rotational axis of the ram ( 11 ).

14 . The linear actuator as claimed in claim 10 , wherein the first and second scanning bodies ( 19 , 20 ) each comprise a roller bearing ( 21 , 22 ).

15 . The linear actuator as claimed in claim 10 , further comprising:
a disc ( 14 ) extending over a partial circle; and a pinion ( 13 ), driven by the drive shaft ( 12 ), wherein the guide curve ( 16 ) is arranged on the disc ( 14 ), the disc ( 14 ), on its periphery, has a partial toothed rim ( 15 ), and the pinion ( 13 ) intermeshes with the partial toothed rim ( 15 ) of the disc ( 14 ).

16 . The linear actuator as claimed in claim 15 , further comprising a fixed stop ( 9 ) protruding into a movement region of the disc ( 14 ).

17 . The linear actuator as claimed in claim 10 , further comprising a valve body ( 5 ) connected to the ram ( 11 ), the valve body ( 5 ) comprising a second stop ( 10 ).

18 . The linear actuator as claimed in claim 11 , wherein the spring element ( 23 ) is configured as a bow-shaped spring plate connecting the first and second scanning bodies ( 19 , 20 ) together.

Assignees

• Continental Automotive Gmbh

Inventors

• Weis Christian
• Mikolajek Carsten

Classifications

• F16K31/52408

  comprising a lift valve · CPC title

• F16H37/124

  for interconverting rotary motion and reciprocating motion · CPC title

• F16H37/12

  Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types (gearings with cranks, eccentrics, or like members fixed to one rotary member and guided along tracks on the other F16H21/14; crank or eccentric gearings with cams or additional guides, or with members having rolling contact F16H21/28, F16H21/30) · CPC title

• F02M26/54

  Rotary actuators, e.g. step motors · CPC title

• F16H53/06

  Cam-followers (F16H53/08 takes precedence) · CPC title