WO2014046933A1

WO2014046933A1 - Actuation device, in particular electronic actuator

Info

Publication number: WO2014046933A1
Application number: PCT/US2013/059181
Authority: WO
Inventors: Hans-Joerg FETZER; Jochen Kraemer
Original assignee: Borgwarner Inc.
Priority date: 2012-09-19
Filing date: 2013-09-11
Publication date: 2014-03-27

Abstract

The invention relates to an actuation device (1), in particular electronic actuator, having a housing (2); having an actuation shank (3); and having a coupling rod (26) which is connected to the actuation shank (3) via a redirecting device (20).

Description

ACTUATION DEVICE, IN PARTICULAR ELECTRONIC ACTUATOR

DESCRIPTION

The invention relates to an actuation device according to claim 1 , in particular an electronic actuator.

It is an object of the present invention to provide an actuation device which makes it possible to realize a redirection of kinematic planes between the actuation shank of the actuation device and a coupling rod which is connected to the actuation shank.

This object is achieved by the features of claim 1.

The dependent claims contain advantageous developments of the invention.

Claims 11 and 12 define an exhaust-gas turbocharger according to the invention as an independently marketable product.

Further details, advantages and features of the present invention become apparent from the following description of exemplary embodiments with reference to the drawing, in which:

Figure 1 shows a perspective illustration of an actuation device according to the invention,

Figure 2 shows a detail illustration of a redirecting device,

Figure 3 shows a front view of a shielding cap,

Figure 4 shows a perspective illustration of the shielding cap as per figure

3,

Figure 5 shows a perspective sectional illustration of a known exhaust-gas turbocharger having an actuator which can be replaced with the actuation device as per figure 1 in order to convert the exhaust-gas turbocharger into a turbocharger according to invention.

Figure 1 illustrates an actuation device 1 according to the invention which, in the example, is in the form of an electronic actuator (electric actuator).

The electric actuator 1 has a housing 2 in which an actuation shank (not visible in its entirety) is guided by way of a first shank portion. The actuation shank has a second shank portion 3 which projects out of the housing 2 and which is indicated by dashed lines in figure 1. As shown in figure 1 , said second shank portion 3 is surrounded by a shielding cap 4 which is fastened, in particular screwed, to the housing 2. Here, the second shank portion 3 is, aside from a fastening region 5, covered by the shielding cap 4 in order to prevent an undesired introduction of heat into the shank portion 3.

As shown by figures 3 and 4 in conjunction with figure 1 , the shielding cap 4 has two interconnected first and second cylinder portions 6 and 7. Here, the cylinder portion 6 has a diameter Di which is smaller than the diameter D₂ of the cylinder portion 7. Here, the cylinder portions 6 and 7 are connected to one another via a rounded transition region 19, wherein the shielding cap 4 is preferably a unipartite component.

As can be seen from a juxtaposition of figures 3 and 4, the shielding cap 4 has cooling and water outlet bores 8, 9, 10 and 11.

In the second cylinder portion 7, there is provided a twist prevention means 12 which is in the form of a recess in the second cylinder portion 7. Said recess 12 has a rectangular recess region 12A and, adjoining the latter and adjacent to the first cylinder portion 6, a conically narrowing recess region 12B. As can be seen from a juxtaposition of figures 3 and 4, the recess 12 adjoins an end-side opening 14 of the second cylinder portion 7, said opening being arranged opposite a passage recess 18 of the first cylinder portion 6, through which passage recess the shank portion 3 extends when the shielding cap 4 is in the mounted state, as can be seen in figure 1. The shielding cap 4 also has a flanged portion 13 which encircles the end-side opening 14 of the second cylinder portion 7. Said flanged portion 13 is provided with recesses, of which the recesses 15, 16 and 17 are visible in figure 4. Said recesses serve for the passage of screws by which the shielding cap 4 can be fastened to the housing 2 of the actuation device 1. In principle, however, other fastening facilities are also conceivable.

Figures 1 and 2 also show that the actuation device 1 according to the invention is provided with a redirecting device 20. Said redirecting device 20 is fixed to the fastening region 5 of the shank portion 3, for which purpose, in the example, the fastening region 5 is provided with an external thread which is not shown in detail in figure 1. Onto the external thread of the fastening region 5 there may be screwed two nuts 27 and 28 which, in the mounted state as shown in figure 1, engage around a connection plate 23 which is provided with a recess 26 through which the fastening region 5 can be passed, as can be seen in figure 1.

The connection plate 23 is arranged on one end side 22 of a central part 21 of the redirecting device 20. As shown in figure 2, in the particularly preferred embodiment illustrated therein, a right angle a is enclosed between the central part 21 and the connection plate 23.

Furthermore, the redirecting device 20 has a journal plate 24 which is arranged on a longitudinal side of the central part 21. From this, it can be seen that the plane of the connection plate 23 is rotated through 90° with respect to the plane of the journal plate 24, as can be seen in detail from the illustration of figure 2. On the journal plate 24 there is arranged a journal 25 which is preferably of spherical form.

As illustrated in figure 1, the journal 25 extends through a connection eyelet of one end of a coupling rod 26 in order to connect the coupling rod 26 to the actuation shank of the electric actuator 1. The eyelet through which the journal 25 extends corresponds to an eyelet 29 arranged on the other end of the coupling rod 26, as can be seen in detail from the illustration of figure 1.

By means of the arrangement, explained above, of the connection plate 23 to an end side 22 of the central part 21 and the arrangement, turned through 90°, of the journal plate 24 on a longitudinal side of the central part 21, a configuration of the redirecting device 20 is attained which permits a redirection of kinematic planes.

The journal 25 may, owing to its construction, be formed as a precision casting or bent sheet-metal part or else as an MIM part.

Figure 5 illustrates, as an example of a known exhaust-gas turbocharger, the turbocharger 30 which has an actuator 44 with a control rod 43. Said design represents a known embodiment. The exhaust-gas turbocharger 30 may however be converted into an exhaust-gas turbocharger according to the invention if the actuator 44 with its control rod 43 is exchanged for the actuation device 1 according to invention explained above in conjunction with figures 1 to 4.

The reference signs used otherwise in figure 5 are explained in the following list of reference signs, because a detailed description of the technical features indicated by said reference signs is not necessary for explaining the principles of the present invention. In addition to the above written disclosure of the invention, reference is hereby explicitly made to the illustrative presentation thereof in Figures 1 to .

LIST OF REFERENCE SIGNS

1 Actuation device (electric actuator)

2 Housing

3 Shank portion

4 Shielding cap

5 Fastening region

6, 7 First and second cylinder portion

8-1 1 Cooling and water outlet bores

12 Twist prevention means

12A Rectangular recess region

12B Conical recess region

13 Flanged portion

14 End-side opening

15-17 Recesses

18 Passage openings

19 Transition region

20 Redirecting device

21 Central part

22 End side

23 Connection plate

24 Journal plate

25 Journal

26 Coupling rod

27, 28 Nuts

29 Eyelet

30 Exhaust-gas turbocharger

31 Turbine housing

32 Compressor housing

33 Bearing housing

34 Turbine wheel

35 Shaft

36 Compressor wheel

37 Turbine housing inlet Turbine housing outlet

Flap arrangement

Flap plate

Flap lever/spindle

Flap shaft

Control rod

Actuator

Right angle

Claims

1. An actuation device (1), in particular electronic actuator,

having a housing (2);

having an actuation shank (3); and

having a coupling rod (26) which is connected to the actuation shank (3) via a redirecting device (20).

2. The actuation device as claimed in claim I, wherein the redirecting device (20) has a central part (21), on one end side (22) of which is arranged a connection plate (23).

3. The actuation device as claimed in claim 2, wherein the connection plate (23) is arranged at a right angle (a) with respect to the central part (21).

4. The actuation device as claimed in claim 2 or 3, wherein the connection plate (23) is formed with a retaining recess (26).

5. The actuation device as claimed in one of claims 2 to 4, wherein the central part (21) is of plate-shaped form.

6. The actuation device as claimed in one of claims 2 to 5, wherein a journal plate (24) is arranged on one longitudinal side of the central part (21). 7. The actuation device as claimed in claim 6, wherein the journal plate

(24) is provided with a journal (25).

8 The actuation device as claimed in claim 7, wherein the journal (25) is of spherical form.

9. The actuation device as claimed in one of claims 1 to 8, wherein the redirecting device (20) is formed as a unipartite component.

10. The actuation device as claimed in one of claims 7 to 9, wherein the journal (25) is formed as a precision casting, bent sheet-metal component or MIM component.

11. An exhaust-gas turbocharger (30) having an actuation device (1) which has a housing (2), an actuation shaft (3) and a coupling rod (26) which is connected to the actuation shank (3) via a redirecting device (20).

12. The exhaust-gas turbocharger as claimed in claim 11, characterized by at least one of the features of claims 2 to 10.