DE102016222868A1 - Camshaft adjuster with extension component - Google Patents

Abstract

The invention relates to a camshaft adjuster (1) for an internal combustion engine, which has a stator (2) and a rotor (3) arranged concentrically with respect to this stator (2), the rotor (3) being connected in a rotationally fixed manner to a camshaft (4). a stator-type cover (5) being prestressable by means of a torsion spring (6), wherein a camshaft-fixed extension component (7) is present, which has a groove (8) which is designed to hold the torsion spring (6) with the extension component (7). connect to.

Description

The invention relates to a camshaft adjuster of a vane type for an internal combustion engine for adjusting the phase position between a crankshaft and a camshaft having a stator and a rotor arranged concentrically to this stator, wherein the rotor is rotatably connected to the camshaft, wherein a statorfester cover over a Torsion spring is prestressed.

Camshaft adjusters are already known from the prior art. Among other things, the US 6,418,895 an apparatus for variably setting the valve opening and closing timings for internal combustion engines, comprising a rotary body rotated in synchronism with the rotation of the internal combustion engine, a camshaft, a housing member rotatably connected to the rotary body, a vane member rotatable in the housing member is used and is rotatably connected to the camshaft, wherein at least one wing radially projecting from the wing member, and at least a pair of working oil chambers, which are partitioned between the housing member and the vane rotor by means of the wing, wherein a Arbeitsöldruckbeaufschlagungs- and -entlastungsvorrichtung, the working oil in one of the two working oil chambers supplies or emptied working oil from the other of the two working oil chambers to achieve a relative rotation between the housing member and the wing member, and a bump portion extending in the axial direction from the wing member to the outside of the Geh useelements protrudes or extends from this position towards the outside.

To move the rotor of a camshaft adjuster back to a starting position, spring elements are often used. These spring elements allow a relative displacement between the stator and the rotor when adjusting the phase position, but bring a bias on the rotor so that it is pushed back to its original position without pressurization. Often torsion springs are used as a spring element.

The prior art, however, always has the disadvantage that a connection between the torsion spring and the rotor either for reasons of compactness is very expensive to implement or the camshaft adjuster occupies a relatively large space.

It is therefore the object of the invention to avoid or at least mitigate the disadvantages of the prior art. In particular, a camshaft adjuster is to be disclosed, which has a torsion spring connected to the rotor and at the same time requires a particularly small installation space.

This object is achieved in a generic device according to the invention in that a camshaft fixed extension member which connects in the axial direction of the camshaft and / or the rotor, is present, which has a groove which is designed to connect the torsion spring with the extension member.

This has the advantage that the camshaft adjuster can be very easily mounted by the multi-part design of the rotor with the extension member and is particularly compact. In addition, the arranged in the groove torsion spring provides a reliable positioning of the rotor relative to the stator.

Advantageous embodiments are claimed in the subclaims and are explained in more detail below.

Furthermore, it is expedient if the extension component frictionally, positively, force and / or cohesively connected to the rotor and / or a rotorfestem component / is connectable. This ensures that the torque of the torsion spring can be transferred to the rotor.

In addition, the extension member may have an oil drain groove / oil supply groove, which advantageously prevents oil segregation in the region of a lock pin / lock bolt designed to non-rotatably connect the rotor to the stator.

Preferably, the Ölablassnut is introduced into the extension member, that it is connected to a recess for the locking pin, so that the locking pin can be advantageously applied with pressure and is displaced against a spring bias.

In addition, it is advantageous if a timing recess / locking hole / timing hole is present in the extension member, advantageously allowing oil loading and unloading into a decelerating and accelerating chamber between the rotor and the stator to adjust the phase position.

Preferably, the timing recess in the extension member is inserted so that it merges into a corresponding recess in the rotor, which is connected to the delay chamber and the acceleration chamber, so that the phase position can be delayed by oil and / or accelerated.

A favorable embodiment is characterized in that in the axial direction of the camshaft and / or the rotor subsequent extension member can be used as a radial bearing for the statorfesten cover and / or a statorfestem component. So it can simply be pushed radially onto the extension member and rotatably mounted, so that a relative movement between a statorfesten and a rotor fixed component is ensured.

Preferably, the statorfeste cover is slidably mounted on the extension member, which advantageously allows a twistability with the least possible friction loss.

The stator-fixed cover may be configured to transmit a torque of the crankshaft to the stator. The torque can be transmitted in a particularly efficient manner if the stator-fixed cover is formed with external teeth, so that the torque is transmitted in a form-fitting manner.

Also, it is advantageous if the extension member is mounted radially rotatable relative to the stator, so that an adjustment of the phase position is not prevented, but the relative rotation between the components which are rotatably connected to the rotor, the camshaft and the extension member, and the statorfesten components is guaranteed.

In other words, the invention relates to an extension component / camshaft adjuster adapter which connects in the axial direction to the camshaft and / or the rotor. In this case, the extension member ensures the proper functioning of a phasing by a groove is formed, which is adapted to receive a torsion spring / torsion, by an oil drain / Ölzufuhrnut, which is / in the region of the locking pin is arranged / arranged to the Rotary to fix the rotor relative to the stator, and in that the extension member provides a radial bearing for a torque of the crankshaft to the stator transmitting component. Also, generic means for phase adjustment are present in the adapter / extension component.

• 1 einen Querschnitt eines Nockenwellenverstellers mit einem an einen Rotor und/oder an eine Nockenwelle angeschlossenes Verlängerungsbauteil,
• 2 eine perspektivische Ansicht des Verlängerungsbauteils, und
• 3 eine zur 2 gedrehte, perspektivische Ansicht des Verlängerungsbauteils.

The invention will be explained below with the aid of a drawing. Show it:

• 1 a cross section of a camshaft adjuster with an attached to a rotor and / or to a camshaft extension member,
• 2 a perspective view of the extension member, and
• 3 one to 2 rotated, perspective view of the extension member.

The figures are merely schematic in nature and are for the sole purpose of understanding the invention. The same elements are provided with the same reference numerals. The features of the individual embodiments can be interchanged.

1 shows a camshaft adjuster 1 with a stator 2 and one to this stator 2 concentrically arranged rotor 3 , which rotates with a camshaft 4 connected is. A statorfester cover 5 is about a torsion spring 6 prestressable, wherein in an axial direction to the rotor 3 and / or the camshaft 4 subsequent extension component 7 in a groove 8th the torsion spring 6 receives. In the extension component 7 is also an oil drain groove 9 brought in.

Generic camshaft adjuster 1 are designed around a phase angle between a crankshaft and a camshaft 4 to adjust. It is with the camshaft 4 rotatably connected rotor 3 relative to the stator 2 rotatable. By pressurizing a delay chamber formed as a vane cell chamber or an acceleration chamber formed as a vane cell chamber, the relative rotation between the stator 2 and rotor 3 affected. This will cause valves to cam through the camshaft 4 are actuated, actuated at a different time than in the predetermined in a starting position rotation between the stator 2 and rotor 3 ,

So that the rotor 3 he always turns back to his starting position, he is about the torsion spring 6 against the stator-resistant cover 5 biased. When pressurizing the chambers of the spring resistance is overcome and a rotation of the rotor 3 authorized. If no pressure is applied to the chambers, the rotor adjusts 3 back in his by the torsion spring 6 default starting position. In the camshaft adjuster according to the invention 1 is the torsion spring 6 so attached that they are in the groove 8th of the rotatably connected to the rotor extension member 7 intervenes. In conventional camshaft adjusters is a suitable attachment of the torsion spring 6 on the rotor 3 often not possible.

The rotor 3 can also have a locking pin 10 rotatably with the stator 2 get connected. The locking pin 10 is in a recess of the rotor 3 arranged and can by pressurizing axially against a spring resistance of a locking spring 11 be moved. Through this mechanism, one of the pin 10 actuated locking sleeve 12 in a recess of a statorfesten cover plate 13 inserted axially. This locks the rotor 3 rotatably with the stator 2 ,

The stator 2 is at its one axial end with the cover plate 13 connected and at the opposite axial end with the lid 5 , The lid 5 has an external toothing 14 on, over which the crankshaft torque on the lid 5 and therefore also on the stator 2 transfers. The stator fixed cover 5 becomes radially from the extension member 7 stored by the the inner surface 15 of the lid 5 on the outside surface 16 of the extension member 7 rests. Here is the lid 5 Sliding, so the torque to the stator 2 can be transmitted as smoothly as possible.

The groove 8th for receiving the torsion spring 6 is in an outer surface 10 of the extension member 7 brought in. The extension component 7 is cylindrical with an annular cross section and consists of a main body 17 and a flange 18 that's the rotor 3 facing side protrudes radially. The flange 18 has a smaller outer diameter than the outer diameter of the main body 17 on which the lid 5 is mounted radially. The groove 8th extends from the edge between the main body 17 and the flange 18 axially more than half of the main body 17 , The groove 8th is about as deep that it reaches the outer diameter of the flange 18 protrudes radially inward.

Because the locking pin 10 is pressurized, is also the oil drain groove 9 introduced into the extension member such that the locking pin 10 can be pressurized and the oil can be drained. The oil drain groove 9 is in the outer surface 15 of the extension member 7 introduced and extends approximately axially and radially as the groove 8th , In the extension component 7 Also, there is an axially extending hole in the manner of a hole that acts as a timing hole / timing slot 19 for the phase adjustment, ie for the pressurization of the deceleration and / or acceleration chamber, is used. The timing slot 19 adjoins a corresponding recess in the rotor 3 attached to the chambers.

At the rotor remote axial side of the extension member 7 is a narrow trained, radially projecting guide ring 20 trained, which is prepared to a to the extension member 7 to pick up the subsequent component.

LIST OF REFERENCE NUMBERS

1

Phaser

2

stator

3

rotor

4

camshaft

5

stator-resistant cover

6

torsion spring

7

extension member

8th

groove

9

oil discharging groove

10

locking pin

11

locking spring

12

locking sleeve

13

cover plate

14

external teeth

15

outer surface

16

palm

17

main body

18

flange

19

Timing hole / slot timing

20

guide ring

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

• US 6418895 [0002]

Claims (4)

Camshaft adjuster (1) for an internal combustion engine, which has a stator (2) and a rotor (3) arranged concentrically to this stator (2), wherein the rotor (3) is non-rotatably connected to a camshaft (4), wherein a statorfester lid (5) is prestressed by a torsion spring (6), characterized in that a camshaft-fixed extension member (7) is present, which has a groove (8) which is adapted to the torsion spring (6) with the extension member (7) connect. Camshaft adjuster (1) to Claim 1 , characterized in that the extension member (7) has an oil drain groove (9). Camshaft adjuster (1) to Claim 1 or 2 , characterized in that in the axial direction of the camshaft (4) and / or the rotor (3) adjoining extension member (7) as a radial bearing for the statorfesten cover (5) is usable. Camshaft adjuster (1) according to one of Claims 1 to 3 , characterized in that the extension member (7) is radially rotatable relative to the stator (2).

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