DE102018005100A1 - Tool for mounting a vibration damper on a crankshaft - Google Patents

Abstract

A tool (2) for fastening a vibration damper (38) on a crankshaft (48) of a motor vehicle engine is described, wherein the tool (2) has an arm (4) which in a first region (4.1) has a connection (8) to the Fixing of the tool (2) at a fixing point (40, 42) of a crankshaft housing (36) of the motor vehicle engine, wherein in a second region (4.2) of the arm (4) spaced from the first region (4.1) an assembly ring (18) for positive locking Approach to the vibration absorber (38) is provided, wherein the connection (8) and mounting ring (18) are aligned axially parallel, wherein the distance (d) between the connection (8) and mounting ring (18) of a relative position between the vibration absorber (38) and crankshaft ( 48).

Description

A tool for mounting a vibration damper on a crankshaft is described.

Tools for mounting a vibration damper on a crankshaft are known. Combustion engines are nowadays usually reciprocating engines. Corresponding reciprocating engines have no uniform rotational movement on a crankshaft. This is due to torque fluctuations during the usual four strokes, the reciprocating engines have: suction, compression, working and ejection. Only during the power stroke torque is generated. The more cylinders an automotive engine has, the more uniformly the torque curve can be designed, but with conventional cylinder numbers, e.g. 3, 4 or 6, vibrations are still caused during operation, which are problematic and therefore must be damped. For this purpose, vibration absorbers or vibration dampers are used, which are bolted directly to the crankshaft according to the prior art.

The vibration absorbers usually have a special damping device. Usually, the damping means is an elastomer or formed by an elastomeric body or rubber body, wherein the rubber body acts as a connecting element, since the flywheel is held on the rubber body on the hub part. The rubber body is elastically deformable within certain limits, whereby vibrations, in particular torsional or rotational vibrations, are damped. Due to the elastic deformability of the rubber body, relative movements, in particular relative rotations, between the hub part and the flywheel are permitted, wherein the rubber body is elastically deformed as a result of such relative movements. Due to this deformation, vibration energy is converted into deformation energy, so that vibrations are damped. The flywheel is formed for example as a flywheel, which surrounds the flange acting as a fastening or support flange, for example, concentrically at least partially.

The mounting of the vibration damper on the flange is usually very expensive, since the screw usually includes a plurality of eccentrically arranged to the axis of rotation screws, which must be mounted or tightened individually. In addition, the mounting arrangement usually comprises a plurality of components, resulting in a long tolerance chain results. Furthermore, it can lead to an undesirable setting behavior, as a result, the screw can loosen or loosen.

From the DE 10 2015 007 175 A1 is a mounting assembly of a flywheel, at least one damping means for damping vibrations and a hub part comprising vibration damper disclosed on a rotatable about a rotation axis flange of a shaft of a vehicle, in which the flywheel and the damping means by mediating the hub part by means of a screw on the flange of the Shaft are fastened, wherein the screw is formed as a central screw, which comprises a concentric with the axis of rotation arranged thread of the flange and a vibration damper attached to the flange screw, which is screwed to the thread by turning the screw about the axis of rotation relative to the flange.

A disadvantage of the known mounting arrangement, however, is that the exact alignment of the vibration is difficult.

Thus, the task of further developing a tool for fixing a vibration damper on a crankshaft such that a particularly simple and also for a long period fixed support of the vibration damper can be realized on the flange.

The object is achieved by a tool for fastening a vibration damper on a crankshaft according to claim 1. Further developments and further developments are the subject of the dependent claims.

Disclosed is a tool for mounting a vibration damper on a crankshaft of an automotive engine, the tool having an arm having in a first region a connection for fixing the tool to a fixing point of a crankcase of the automotive engine, wherein in a second region spaced from the first region the arm a mounting ring is provided for the positive fit to the vibration damper, wherein connection and mounting ring are aligned axially parallel, wherein the distance between the connection and mounting ring corresponds to a relative position between the vibration damper and crankshaft.

With the aid of the corresponding tool, a vibration damper can be reliably mounted in the correct position on the crankshaft of the motor vehicle engine. The fact that the tool can be fixed by means of the arm on the crankcase, the relative position in which the Vibration damper can be mounted, simply specified or predefinable.

The two areas can represent end portions of the arm to keep the tool as easy and manageable as possible.

The fixing point of the crankshaft housing may be, for example, a bore or a bolt.

In a first further embodiment, it may be provided that the connection has an axially displaceable cylinder element, which is designed for insertion into a bore serving as a fixing point in the crankshaft housing, wherein the cylinder element has a smaller diameter than the bore. The cylinder member thus allows easy positioning of the tool relative to the crankcase. The smaller diameter of the cylinder element relative to the bore allows easy insertion and can serve as a tolerance compensation.

In a further embodiment, it can be provided that the cylinder element has a lock or a bayonet lock, with which it can be locked in the axially extended position. In this way, accidental release of the tool from the crankcase can be prevented.

In a further embodiment which goes beyond this, it can be provided that the connection has a screw or a knurled screw for fixing the tool to the crankshaft housing. Equivalent can be configured as a threaded bolt in a crankshaft housing with bolts of the bolt and have the connection via a rotatable internal thread. In this way, the tool can be captively attached to the crankcase.

In particular, in combination of a cylinder element with screw or thumbscrew a simple attachment of the tool for the purpose of mounting the vibration damper on the crankcase is possible. In this case, the cylinder element is first pushed forward into the bore on the crankshaft housing and tightened in a subsequent step, the screw or thumbscrew in a corresponding threaded bore of the crankcase. In this embodiment, it makes sense if the cylinder element is a sleeve, so that cylinder element and screw or thumbscrew are coaxial.

In another further embodiment, it can be provided that the mounting collar has a connection, the inner contour of which has a guide for a screwing tool, wherein the arm has a bore aligned with the connection in the second region. This allows the vibration damper to be attached to the crankshaft of the automobile engine through the tool, since the nozzle and bore allow access to the corresponding attachment means, for example screws.

In another further embodiment, an adjusting lever can be arranged on the arm, through which the arm can be rotated. This allows accurate positioning of the vibration damper relative to the crankcase and thus facilitates assembly. The arm may be aligned in a plane perpendicular to the terminal and mounting ring axis. The arm may according to a development having a handle that facilitates the operation.

In some embodiments, the arm may also serve to rotate the mounting rim relative to the arm to accurately align the vibration damper on the crankshaft.

According to another further embodiment, a grab handle or an ironing handle can be arranged between the first area and the second area. A corresponding handle facilitates the attachment and holding of the tool during the determination of the tool on the crankshaft housing.

In another further embodiment, it may be provided that the inner contour of the mounting ring is star-shaped or cloverleaf-shaped. The recesses resulting from such inner contours can be used as guides for a mounting tool for the attachment means of the vibration absorber on the crankshaft, for example, the screws, which greatly facilitates the assembly.

Further advantages, features and details will become apparent from the following description in which - where appropriate, with reference to the drawings - at least one embodiment is described in detail. The same, similar and / or functionally identical parts are provided with the same reference numerals.

• 1 eine perspektivische Darstellung eines Werkzeugs;
• 2 eine perspektivische Darstellung des Werkzeugs aus einer anderen Blickrichtung;
• 3 eine Frontalansicht auf das Werkzeug;
• 4 eine Schnittdarstellung des Werkzeugs entlang der Schnittlinie A-A aus 3;
• 5 eine Schnittdarstellung des Werkzeugs entlang der Schnittlinie C-C aus 3;
• 6 eine perspektivische Darstellung eines Kurbelwellengehäuses mit daran angesetzten Werkzeug;
• 7 ein Querschnitt durch das Kurbelwellengehäuse mit daran angesetzten Werkzeug;
• 8 eine Frontalansicht auf Werkzeug und Kurbelwellengehäuse, sowie
• 9 eine Schnittdarstellung gemäß der Schnittlinie D-D aus 7.

They show schematically:

• 1 a perspective view of a tool;
• 2 a perspective view of the tool from another viewing direction;
• 3 a frontal view of the tool;
• 4 a sectional view of the tool along the section line AA 3 ;
• 5 a sectional view of the tool along the section line CC 3 ;
• 6 a perspective view of a crankcase with it attached tool;
• 7 a cross section through the crankcase with attached tool;
• 8th a frontal view on tool and crankcase, as well
• 9 a sectional view according to the section line DD from 7 ,

1 shows a perspective view of a tool 2 ,

The tool 2 has an arm 4 on which a temples grab handle 6 is arranged, by means of which the tool 2 held and off at one 6 shown crankshaft housing of a motor vehicle engine can be positioned.

The arm 4 has a first end area 4.1 on, on which a connection 8th to be arranged on the crankshaft housing. The connection 8th has a sleeve 10 in which a thumbscrew 12 is held, which is the sleeve 10 axially projecting in both directions. The sleeve 10 is by hand 16 axially displaceable and by means of a bayonet lock 14 lockable in an extended position shown here. Because the thumbscrew 12 in the sleeve 10 is guided, the knurled screw 12 when moving the sleeve 10 together with the sleeve 10 moved axially back and forth.

The arm 4 has a second end region 4.2 on, on which a mounting wreath 18 is arranged. The assembly wreath 18 has a nozzle 20 on, which is open in the axial direction to both sides. The stub 20 has a connection contour, which allows a positive connection with the vibration damper. This is the nozzle 20 designed in a front end cloverleaf shape.

The arm 4 points in the second end area 4.2 a hole 22 on that with the neck 20 flees. In this way, an assembly tool of the in 1 visible side through the hole 22 be guided and fixing the vibration damper with attached tool 2 be used.

The arm 4 further points in the second end area 4.2 an adjustment lever 24 with a handle 26 on, by means of which the tool 2 and the vibration damper for fixing the vibration damper can be aligned exactly to the crankcase.

2 shows a perspective view of the tool 2 from a different perspective than 1 ,

The connection contour 28 of the neck 20 is cloverleaf-shaped and has four lobes in the present case, by means of which screws for fixing the vibration damper can be tightened to the crankshaft.

The connection 8th has a connection axis xa on, parallel to an extension axis xb of the nozzle 20 is aligned. Thus, an accurate by the distance d of the two axes xa and xb specific mounting position of the vibration damper is achieved relative to the crankcase.

The adjustment lever 24 lies in a plane perpendicular to the axes xa and xb , whereby this even when attached to the crankshaft housing tool 2 is well tangible.

3 shows a frontal view of the tool 2 ,

The hole 22 corresponds to the uniform connection contour 28 , whereby a corresponding assembly tool, such as a screwdriver, can be well positioned.

4 shows a sectional view of the tool 2 along the section line AA 3 ,

The assembly wreath 18 is by means of screws 30 on the arm 4 established.

5 shows a sectional view of the tool 2 along the section line CC off 3 ,

The connection 8th is by means of several screws 32 on the arm 4 established.

The ironing handle 6 is by means of a screw 34 on the arm 4 established.

6 shows a perspective view of a crankshaft housing 36 with attached tool 2 ,

On the crankshaft housing 36 is a vibration absorber 38 arranged using the tool 2 is mounted.

7 shows a cross section through the crankcase 36 with attached tool 2 ,

The crankshaft housing 36 has a hole 40 with threaded hole inserted in it 42 on. The sleeve 10 extends with its front end into the hole 40 into it, the thumbscrew 12 is in the tapped hole 42 screwed.

That way, the tool becomes 2 fixed to the exact position on the crankshaft housing 36 established.

The stub 20 sits form-fitting on a connection 44 the vibration absorber 38 ,

The vibration absorber 38 is on a flange 46 a crankshaft 48 assembled. This will be several screws 50 used.

8th shows a frontal view on tool 2 and crankshaft housing 36 ,

9 shows a sectional view according to the section line DD 7 ,

An inner contour 52 of the neck 20 is shaped so that the four screws 50 come to rest in the bulges of the cloverleaf.

Although the invention has been further illustrated and explained in detail by way of preferred embodiments, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention. It is therefore clear that a multitude of possible variations exists. It is also to be understood that exemplified embodiments are really only examples that are not to be construed in any way as limiting the scope, applicability, or configuration of the invention. Rather, the foregoing description and description enable the skilled artisan to practice the exemplary embodiments, and those of skill in the knowledge of the disclosed inventive concept may make various changes, for example, to the function or arrangement of particular elements recited in an exemplary embodiment. without departing from the scope defined by the claims and their legal equivalents, such as further explanation in the description.

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 102015007175 A1 [0005]

Claims (8)

Tool for fastening a vibration absorber (38) on a crankshaft (48) of a motor vehicle engine, characterized in that the tool (2) has an arm (4) in a first area (4.1) a connection (8) for fixing the tool (2) at a fixing point (40, 42) of a crankshaft housing (36) of the motor vehicle engine, wherein in one of the first region (4.1) spaced second region (4.2) of the arm (4) a mounting ring (18) for the positive fit to the Vibration absorber (38) is provided, wherein connection (8) and mounting ring (18) are aligned axially parallel, wherein the distance (d) between terminal (8) and mounting ring (18) corresponds to a relative position between the vibration absorber (38) and crankshaft (48) , Tool after Claim 1 , characterized in that the connection (8) has an axially displaceable cylinder element (10) which is designed for insertion into a fixing point serving as a fixing hole (40) in the crankcase (36), wherein the cylinder element (10) has a smaller diameter than the bore (40). Tool after Claim 2 characterized in that. The cylinder element (10) has a lock or a bayonet closure (14), with which it can be locked in the axially extended position. Tool according to one of the preceding claims, characterized in that the connection (8) has a screw or a knurled screw (12) for fixing the tool (2) on the crankshaft housing (36). Tool according to one of the preceding claims, characterized in that the mounting ring (18) has a connecting piece (20), the inner contour (52) is a guide for a screwing, wherein the arm (4) in the second region (4.2) with a Stub (20) has aligned bore (22). Tool according to one of the preceding claims, characterized in that on the arm (4) an adjusting lever (24) is arranged, through which the arm (4) can be rotated. Tool according to one of the preceding claims, characterized in that on the arm (4) between the first region (4.1) and the second region (4.2) a handle or an ironing handle (6) is arranged. Tool according to one of the preceding claims, characterized in that the inner contour (52) of the mounting ring (18) is star-shaped or cloverleaf-shaped.

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