DE102014218872A1 - Arrangement of a rocker arm for the valve train of an internal combustion engine - Google Patents

Abstract

In an arrangement of a rocker arm (1) for the valve train in a support designated with Blechcamsupport an internal combustion engine, the rocker arm (1) is pivotally mounted in its central lever area about a solid in the engine rocker shaft (2). At its one longitudinal end, it has a rotatably mounted cam roller (4). Its other longitudinal end is formed cooperatively with a valve stem end. According to the invention, the carrier has two spaced-apart side walls (7, 9) in which the rocker shaft (2) is mounted, with its one end in an exhibition or bulge (6) of the first side wall (7) held and is plugged with its other end in a bore of the second side wall (9). In the carrier in a circumferential groove of the rocker shaft (2), a securing ring (11) is inserted, which bears against the second side wall (9) axially. In this way, the rocker shaft (2) is held axially secured between the side walls (7, 9).

Description

Field of the invention

The invention relates to the arrangement of a rocker arm for the valve train in a support designated with Blechcamsupport of an internal combustion engine, which is pivotally mounted in its central lever portion about a solid in the engine rocker shaft, at its one longitudinal end a rotatably mounted, in the installed state of the cam one Has camshaft acted upon roller and whose other longitudinal end is formed cooperatively with a valve stem end.

Background of the invention

From the publication DE 42 34 868 C2 is for a valve train in addition to a formed as a sheet metal part rocker arm also known a rocker arm, which is pivotally mounted on an axis in a cylinder head, not shown. At one longitudinal end of the lever, a lash adjuster forms a contact surface for a valve stem end, while at the other longitudinal end there is a contact surface for a lobe formed by the outer peripheral surface of a rotatably mounted roller.

For a pivotally mounted in an internal combustion engine rocker arm axial fixing of the rocker shaft with two nuts screwed is known. When used, however, the production of two threads on the rocker shaft is required. In addition, two holes must be provided for receiving the rocker shaft in the carrier, for example, to be punched out and the assembly of the nuts requires space in the two end portions of the rocker shaft.

Summary of the invention

The invention has for its object to simplify the axial fixation of the rocker shaft in the provided for the rocker arm carrier of the internal combustion engine and to improve.

This object is achieved in that the carrier has at a distance from one another arranged side walls, in which the Kipphebelachse is mounted, being held with its one end in an exhibition or bulge of the first side wall and with its other end in a bore of inserted second side wall and secured axially there.

In the carrier, a retaining ring is inserted into a circumferential groove of the rocker shaft, which is arranged axially adjacent to the space enclosed by the side walls on the second side wall. Thus, the rocker arm is pivotally mounted about the rocker arm axis and for this purpose the rocker arm axis is axially fixed in the support of the internal combustion engine between the two side walls.

The locking ring has a circumferential opening and an inner diameter which is slightly smaller than the diameter of the groove bottom of the rocker shaft.

The cylindrical exhibition or bulge of the first side wall of the carrier is used for radial support of the rocker arm axis and to ensure the arrangement thereof in the one axial direction. It has been incorporated in the manufacturing process of the carrier in the first side wall. In the second side wall, the bore may have been made by punching. It only provides for the radial support of the rocker shaft. To secure the rocker arm shaft in the other axial direction of the locking ring is used, which is inserted into the annular circumferential groove of the rocker shaft. The retaining ring has in addition to a circumferential opening and an inner diameter which is slightly smaller than the diameter of the groove bottom of the rocker shaft.

When arranging the groove on the rocker shaft, care must be taken that the groove is located immediately next to the second side wall of the support on which the hole is punched out.

The assembly of the rocker arm in the carrier is as follows: First, the rocker arm is moved into the carrier in its intended position and held there. Then the rocker arm shaft is pushed through the bore of the second side wall and through the bearing point of the rocker arm in the middle lever area in the bulge of the first side wall to the stop. Subsequently, the locking ring is pressed with its circumferential opening ahead in the groove of the rocker shaft until it snaps there.

Short description of the drawing

An embodiment of the invention is illustrated in the drawing and will be described in more detail below. Show it

1 a mounted from a rocker arm, a rocker shaft, two side walls of a carrier and a retaining ring assembly for the arrangement in an internal combustion engine, in perspective view;

2 a section of the two side walls of the carrier, schematically in perspective view;

3 a rocker shaft in the side view;

4 the rocker shaft in the assembly according to 1 in a section and in the direction of view to a valve of the internal combustion engine;

5 the rocker shaft in the assembly according to 1 in a section, as well as held by a locking ring rocker arm in a side view;

6 the rocker arm in the assembly according to 5 in the bottom view;

7 the rocker arm in the assembly according to 5 in plan view;

8th the rocker arm in the assembly according to 5 in the view on the cam-side longitudinal end;

9 the rocker arm in the assembly according to 5 , in the view on the valve-side longitudinal end.

Detailed description of the drawing

The assembly shown in the drawing for the valve train in the internal combustion engine includes a rocker arm 1 , which in its central area about a rocker shaft 2 is pivotally mounted. At its one longitudinal end 3 is a cam roller 4 rotatably mounted while its other longitudinal end 5 is designed for the action on a valve. The rocker shaft 2 is with its one end in a bulge 6 a first side wall 7 and with its other end in a hole 8th a second side wall 9 stored. The two side walls 7 and 9 are each part of a stationary in the internal combustion engine carrier.

The rocker shaft 2 has a circular circumferential groove 10 on. This is in the installed state in the carrier of the rocker shaft 2 on the inside of the carrier on the second end wall 9 arranged immediately adjacent. In the groove 10 is a circlip 11 inserted, and that has a circumferential opening 12 on, with which he to the groove bottom of the rocker shaft 2 was pressed radially until it is in the groove 10 springy snapped. The circlip 11 has an inner diameter which is slightly smaller than the diameter of the groove bottom of the rocker shaft 2 is. As a result of this design and arrangement is the rocker shaft 2 and with it the rocker arm 1 axially fixed in the carrier, because in one axial direction is the Kipphebelachse 2 in the bulge 6 the first side wall 7 which forms a stop, and in the other axial direction becomes the Kipphebelachse 2 over the circlip 11 held on the inside of the carrier on the second side wall 9 is applied.

LIST OF REFERENCE NUMBERS

1

 rocker arm

2

 rocker shaft

3

 cam-side longitudinal end

4

 cam roller

5

 valve-side longitudinal end

6

 bulge

7

 first sidewall

8th

 drilling

9

 second side wall

10

 circumferential groove

11

 circlip

12

 peripheral opening

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 4234868 C2 [0002]

Claims (3)

Arrangement of a rocker arm ( 1 ) for the valve drive in a support designated with Blechcamsupport carrier of an internal combustion engine, which in its central lever region about a solid in the engine rocker shaft axis ( 2 ) is pivotally mounted, at its one longitudinal end ( 3 ) a rotatably mounted, acted upon by the cam of a camshaft in the installed state ( 4 ) and whose other longitudinal end ( 5 ) is cooperatively formed with a valve stem end, characterized in that the carrier has two spaced-apart side walls ( 7 . 9 ), in which the rocker arm axis ( 2 ), with one end in an exhibition or bulge ( 6 ) of the first side wall ( 7 ) and with its other end in a bore ( 8th ) of the second side wall ( 9 ) and axially secured there. Arrangement according to claim 1, characterized in that in the carrier in a circumferential groove ( 10 ) of the rocker shaft ( 2 ) a retaining ring ( 11 ) inserted inside of the side walls ( 7 . 9 ) enclosed space on the second side wall ( 9 ) is arranged axially adjacent. Arrangement according to claim 2, characterized in that the retaining ring ( 11 ) a circumferential opening ( 12 ) and an inner diameter which is slightly smaller than the diameter of the groove bottom of the rocker shaft ( 2 ).

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