WO2015149779A1

WO2015149779A1 - Sealing element for a clutch bell

Info

Publication number: WO2015149779A1
Application number: PCT/DE2015/200163
Authority: WO
Inventors: Alexander Glebov; Simon Ortmann
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2014-04-03
Filing date: 2015-03-16
Publication date: 2015-10-08
Also published as: DE112015001630A5

Abstract

The invention relates to a sealing element (1) for a clutch bell (2) having a cylindrical elastomer body (3) with a central passage (4) for a feed-through element (5), wherein the elastomer body (3) has an insertion section (6) with a first diameter (7), a sealing section (8) with a second diameter (9) and an end section (10) with a third diameter (11), wherein the sealing section (8) is arranged between the insertion section (6) and the end section (10), and wherein the first diameter (7) is smaller than the second diameter (9). Such a configuration requires little installation space, such that it is possible to carry this out irrespective of the shape of the clutch bell.

Description

Sealing element for a clutch bell

The invention relates to a sealing element for a clutch bell, in particular for a clutch bell of a drive system for a motor vehicle, in which a clutch is protected against environmental influences.

In the prior art clutch bell are known in which for a

Hydraulic feedthrough provided an opening, wherein the opening is introduced in a special paragraph. The heel is transverse to an axial orientation of the

Hydraulic feedthrough formed so that the opening edges lie in a plane which is aligned transversely to the axial alignment of the hydraulic feedthrough. However, so that the design of the clutch bell is very expensive and it is needed for sales much additional space. However, a sufficient seal with known sealing elements, such as an O-ring, otherwise can not be accomplished.

On this basis, the present invention has the object, at least partially overcome the known from the prior art disadvantages. The object is solved by the features of the independent claims. Advantageous developments are the subject of the dependent claims.

The invention relates to a sealing element for a clutch bell, which has a cylindrical elastomeric body with a central passage for a lead-through element, wherein the elastomeric body has an insertion portion having a first diameter, a sealing portion having a second diameter and an end portion having a third diameter, wherein the sealing portion is arranged between the insertion portion and the end portion, and wherein the first diameter is smaller than the second diameter.

The sealing element has a cylindrical elastomeric body. The elastomer body thus has a height that is greater than the wall thickness, in particular a height which is in the range of the diameter or greater than the diameter. This does not mean that the elastomeric body is a rotationally symmetrical component. In an advantageous application, the elastomer body has a variable radius over the circumference. For many applications, however, the elastomeric body is preferably an im

Essentially rotationally symmetric component. The elastomeric body has a central passage through which the axis of rotation runs centrally in the case of a rotationally symmetrical component. Here, a lead-through element, for example a hydraulic line, can be passed through, wherein the elastomeric body seals against the lead-through element in the central passage. The elastomeric body has an insertion portion which has a reduced diameter relative to the sealing portion, so that the elastomeric body is easily insertable into an opening. The second diameter of the

But sealing portion is arranged such that the elastomeric body is placed in the installation in an opening under tension and thus rests sealingly against the opening. Of the

End portion is set up so that it does not cooperate in the sealing, as well as the insertion does not participate in densities. With the sealing element proposed here openings can be sealed with oblique opening edges, without the need for this a greater effort. In particular, no exact adaptation of the

Sealing element to the geometry of the opening edges are made.

According to a further advantageous embodiment of the sealing element is the third

Diameter smaller than the second diameter.

In this advantageous embodiment of the sealing element forms a barrel shape in which both the insertion and the end portion has a small diameter than the sealing portion which is disposed between the end portion and the insertion portion. Thus, the sealing element to various forms of the opening edges, which are to be sealed, sealing inserted.

According to a further advantageous embodiment of the sealing element has the

Elastomer body at the end portion has a splash water cover.

The spray water cover forms a liquid-repellent protective screen, which protects the opening and the other elastomer body against splashing water, in particular in front of a

Pressure jet of a jet cleaner protects. In this case, splash water cover is not only suitable for protection against splashing water, but from any of the side of the end portion drop-shaped incident liquid. Particularly preferably, the spray water cover forms a thin flange formed from the elastomer, which radially covers the sealing surface between the opening to be sealed and the sealing portion.

According to a further advantageous embodiment of the sealing element is on

Insertion section, an axially extending sealing extension is arranged.

The sealing extension is adapted to abut against the lead-through element at least in places and thus to accomplish a seal towards the lead-through element. By extending the insertion section, an enlargement of the contact surface is achieved, whereby the sealing effect is improved. In addition, formed by the sealing extension, based on at least friction, axial captive. According to a further advantageous embodiment of the sealing element, an anti-rotation device is provided, by means of which in the installation of the sealing element, a rotation of the sealing element relative to a bushing element and / or can be prevented relative to an opening to be sealed.

By means of the anti-rotation, which is formed for example as a cutout, which cooperates with a corresponding projection, or which is formed for example as a projection which cooperates with a corresponding cutout, is a rotation of the

Sealing element relative to the lead-through element and / or relative to the sealed opening can be prevented. This makes it possible to adapt the sealing element individually to the lead-through element or the opening to be sealed and one of a pure

Rotational symmetry deviating sealing surface both to the feed-through element as well as the opening to be sealed, as needed, set up. For example, such is one

Anti-rotation device introduced as a notch in the region of the end portion, in which a tongue-like flange of the lead-through element extends, which also secures the sealing element axially. This can also be implemented with the sealed opening. Likewise, such an anti-rotation device with a corresponding counter-element is also preferred for one

Anti-rotation of the lead-through element with respect to the sealed opening

or the wall, in which the opening is introduced, provided.

According to a further advantageous embodiment of the sealing element has the

Elastomer body on an inner wall, with which a fluid-filled cavity is encompassed, wherein at the insertion and the end portion each have a collar is formed.

In this advantageous embodiment, a cavity is provided, which is preferably filled with air, but may also be filled with a liquid or another gas. As a result, the elasticity of the elastomer body in the sealing portion is easily adjustable, so that, for example, a safe investment in two sealing lines is possible, namely at the inlet side of the opening and the outlet side of the opening. The preferred arched outwards

Outer surface of the sealing portion of the sealing element is then arched inward in the installation, so that a waist formed at the opening to be sealed. The insertion section and the end section each form a collar, which on the one hand form an abutment for the deformation of the sealing section, and on the other hand effect at least one seal to the lead-through element. The inner wall is so in one on the

Implementing element applied state of an outer surface of the sealing seat of the lead-through element in the region of the sealing portion spaced. This allows a good adaptation to any geometry of the opening edges. When installed, the inner wall can rest on the outer surface of the sealing seat. According to a further advantageous embodiment of the sealing element at least one sealing lip is provided in the cavity, which is adapted to a

Passing element in the center sealingly abut.

The sealing lip supports the sealing effect of the sealing element relative to the

Through element. Most preferably, the sealing lip is arranged in a direction inclined to the axis of the lead-through element, and is stretched by the lead-through element or its surface, so that the sealing lip is pressed against the surface of the lead-through element. Most preferably, the sealing lip is inclined with its contact surface for a lead-through element to the insertion, so that the

Sealing lip is made self-sealing from the insertion to the end portion. The inclination of the sealing lip but is also inclined against the direction in which the sealing element applied to the lead-through, for example, slid, to be; that is, the connection to the inner wall of the sealing portion is directed towards the Aufführöffnung.

The sealing lip is preferably formed of a thinner material than the rest

Elastomer body, so that in a spreading of the elastomeric body by the introduction of the sealing element in a sealed opening, the sealing lip continues to bear against the surface of the lead-through element and acts sealingly.

According to a further aspect of the invention, a lead-through element for guiding into a clutch bell is proposed, which has a sealing seat with an outer surface for a sealing element as described above, wherein the fluid-filled cavity between the outer surface and the inner wall of the sealing element spaced therefrom at least in the sealing section can be formed ,

The lead-through element is a generally elongated object, which is to be passed through a clutch bell, for example, in order to be guided to a clutch, for example. For example, the lead-through element is a component of a hydraulic line. The lead-through element has a sealing seat, on the outer surface of which a sealing element according to the above description can be applied, so that a sealing effect with respect to the outer surface of the sealing seat is ensured. In this case, in a state in which the sealing element is applied to the sealing seat, between the

Outer surface and the sealing area or its inner wall formed a distance, so that a fluid is held therein, more preferably air. If that

Guide element is inserted into an opening to be sealed, comes in a preferred embodiment, the sealing area with its inner wall on the outer surface at least partially to concern. By the arrangement proposed here, it is possible to have a To make a particularly simple sealed implementation of a lead-through element through an opening in an inclined and / or curved wall to the opening axis.

In particular, it is possible to dispense with a shoulder oriented transversely to the opening axis for the opening.

According to a further aspect of the invention, a sealing arrangement for a

Clutch Bell proposed, which comprises at least the following components: a wall having an opening with an opening axis and a

Opening diameter, wherein the wall is preferably inclined and / or curved in the region of the opening with respect to the opening axis;

a feed-through element, preferably as described above, for passing through the opening in the wall;

a sealing element according to the above description, wherein the sealing element has a first diameter which is smaller than the opening diameter, and has a second diameter which is greater than the opening diameter,

wherein the lead-through element is encompassable by means of the sealing element and the

Sealing element with the lead-through element in the opening of the wall is sealingly inserted.

The sealing arrangement comprises a wall, wherein the wall is arranged inclined to the opening axis and / or additionally arched, so that the opening edges are mutually angled, ie inclined, aligned. Furthermore, a feedthrough element is provided which, for example, as described above, is an element of a hydraulic line. For sealing between the lead-through element and the opening in the wall is still a

Sealing element according to the above description provided, wherein the first diameter of the sealing element at the insertion portion is smaller than the opening diameter, so that the sealing element is easily inserted into the opening. Furthermore, the second diameter of the sealing portion of the sealing element is greater than the opening diameter, so that the

Sealing element with the sealing portion under tension in the opening. The sealing effect of the sealing element for the lead-through element is very particularly preferred

Pushing into the opening improved by the sealing surfaces to the outer surface, for example, the frets, by the introduction of the sealing element in the opening to the

Be pressed on the outside surface.

According to a further aspect of the invention is a clutch bell for a

Propulsion system of a motor vehicle proposed, which at least the following

Components comprising:

an engine mounting area;

a transmission mounting area; a bell-shaped wall between the engine mounting portion and the transmission mounting portion, wherein in the bell-like wall, a sealing arrangement is introduced as described above and wherein the bell-shaped wall is inclined in the region of the opening to the opening axis and at least partially curved.

The clutch bell is intended to protect a clutch from environmental influences, and also an attachment to a drive unit, for example a

Internal combustion engine to form and also to form a connection for the transmission of a motor vehicle. Usually, such a clutch bell is a cast component whose material insert is optimized for the mechanical load and for the casting removal and thus has a plurality of inclined and curved wall elements. In order to be able to carry out a feedthrough element through the clutch bell, such a clutch bell would have to be elaborately reconfigured and / or reworked in order to form a straight shoulder into which an opening can be made. Such a paragraph would lead to an increase in the material cost of the clutch bell and also generate additional space requirements. With the sealing element proposed here, a seal in any area of the clutch bell can be introduced, wherein it is ensured that the sealing arrangement both to

Guide element as well as the opening seals.

According to a further aspect of the invention, a motor vehicle is proposed which comprises a drive system with a drive unit, an output shaft, a

Drive train and a friction clutch in a clutch bell according to the above

Description has.

Most motor vehicles today have a front-wheel drive and therefore preferably arrange the drive unit, for example an internal combustion engine or an electric motor, in front of the driver's cab and transversely to the main drive direction. The space is particularly small in such an arrangement and it is therefore particularly advantageous to use a friction clutch small size.

The installation space situation for passenger cars of the small car class according to European classification is exacerbated. The units used in a passenger car of the small car class are not significantly reduced compared to passenger cars larger car classes. Nevertheless, the available space for small cars is much smaller. The implementation of a feedthrough element, preferably one

Hydraulic line, through a clutch bell of a drive system is connected to the here described sealing element particularly simple. In particular, no additional

Space required and saved compared to a conventional solution space.

Passenger cars are classified according to a vehicle class according to, for example, size, price, weight, power, this definition being a constant change according to the

Market needs. In the US market, vehicles of the class small cars and microcars are classified according to European classification of the class of subcompact car and in the British market they correspond to the class Supermini, for example, the class City Car. Examples of the micro car class are a Volkswagen Fox or a Renault Twingo.

Examples of the small car class are an Alfa Romeo Mito, Volkswagen Polo, Ford Fiesta or Renault Clio.

The features listed individually in the claims can be combined with each other in any technologically meaningful manner and can be supplemented by explanatory facts from the description and details of the figures, with further

Embodiments of the invention will be shown.

The invention and the technical environment will be explained in more detail with reference to FIGS. The figures show particularly preferred embodiments to which the

Invention is not limited. In particular, it should be noted that the figures and in particular the illustrated proportions are only schematic. Show it:

1: a sealing arrangement with barrel-shaped sealing element in section,

2 shows a sealing arrangement with barrel-shaped sealing element in isometric view,

3: a section of a clutch bell with sealing element in section,

4 shows a detailed view of the sealing element of Fig. 3,

5: a sealing element with sealing lip, anti-rotation and splash water cover,

6 shows a detail of a clutch bell with a sealing element as in FIG. 5, FIG.

Fig. 7: a motor vehicle with a drive system.

In Fig. 1, a seal assembly 24 is shown in section, wherein a sealing element 1 in

Barrel shape is shown. The sealing element 1 is an elastomeric body 3. The first diameter 7 of the insertion section 6 is smaller than the second diameter 9 of the sealing section 8 and the third diameter 11 of the end section 10 is smaller than the second diameter 9. The opening diameter 27 of the opening 15 is also smaller than the second diameter 9 the sealing portion 8, so that the sealing portion 8 sealingly abuts the opening 15. In the center 21, a passage 4 is formed, through which a lead-through element 5 extends and whose sealing seat 22 is sealed by the first collar 18 at the insertion section 6 and the second collar 19 at the end portion 10 with the sealing element 1 to the center 21. In this example, the inner wall 16 of the elastomeric body 3 with the outer surface 23 of the sealing seat 22 forms a cavity 17 in which, for example, air is contained. As a result, a good adaptation to the opening 15 is possible. Here it can be seen that the wall 25, in which the opening 15 is introduced with the opening diameter 27, for

Opening axis 26 is aligned inclined in the center 21, so that the opening 15 is not present in a plane normal to the opening axis 26 on the sealing element 1.

2, the same sealing element 1 is shown in the same sealing arrangement 24 as in Fig. 1 in an isometric section, in which case the opening 15 can be seen by lines that form two sealing lines in a real application of the sealing element, so that the sealing effect of the sealing element 1 despite the inclined wall 25 is very good.

In Fig. 3, for example, a section of a clutch bell 2 is shown, in which a feed-through element 5, which is shown here as a hydraulic line, through the passage 4 in the center 21 of the sealing element 1 extends. Here, the sealing element 1 is shown deformed in the opening 15, so that it can be seen that forms a waist. At the same time, the first collar 18 and the second collar 19 are pressed. The cavity 17 between the inner wall 16 and the outer surface 23 of the sealing seat 22 supports the deformation of the sealing element first

In Fig. 4, the arrangement as shown in Fig. 3 in detail, in which case again the opening 15 can be seen by lines, which form the sealing lines here.

In Fig. 5, an alternative embodiment of the sealing element 1 is shown, wherein here on the insertion section 6, a sealing extension 13 is formed, which forms a captive and at the same time improves the sealing effect to the sealing seat of the lead-through element 5 in the center 21. In the collar 18 of the end portion 10 a rotation 14 is formed, which here as

Cutout is formed, in which a corresponding flange of the lead-through element 5 engages. Furthermore, a spray water cover 12 is formed at the end portion 10, which covers the sealing seat against liquids that are sprayed so fall in the form of drops. Furthermore, a sealing lip 20 is arranged in the cavity 17, which in a deformation of the sealing portion 8 for a secure seal on the sealing seat 22 and on the Outer surface 23 of the lead-through element 5 provides. Here, the first diameter 7 of the insertion section 6 is smaller than the second diameter 9 and the third diameter 1 1 is the same size as the second diameter 9. About the thickness of the elastomer body 3 is a good stability and positional securing of the lead-through element 5 in the center 21 of the sealing element 1 formed.

FIG. 6 shows a section of a clutch bell 2 with a free-form wall 25, in which it can be clearly seen that the shape of the sealing element 1 is exactly matched to the opening 15 in the wall 25, in particular the splash guard 12. The sealing lips 20 are due to their thin design and their inclined shape towards the interior of the

Clutch bell 2 unaffected by a deformation at the opening 15. The sealing extension 13 provides a captive and a first seal to the center 21st

In Fig. 7, a motor vehicle 29 is shown with a drive system 28 which is composed of a drive unit 34, an output shaft 32, a transmission 39 and a friction clutch 38 connected therebetween in a clutch bell 2. The

Clutch bell 2 has a motor mounting portion 30 and a

Gear mounting portion 31, on which the clutch bell at each of the

Drive unit 34 and the transmission 39 is fixed or the latter stops. In the interior of the clutch bell 2, a hydraulic line 40 extends for the friction clutch 38, wherein no additional paragraph for introducing the hydraulic line 40 must be provided here. The drive system 28 supplies a purely schematically illustrated drive train 33 here. The drive system 28 is located in front of

Driver's cab 35 and with the motor shaft 37 transversely to the longitudinal axis 36 of the motor vehicle 29th

In such a configuration, little space is required, so that an independent of the shape of the clutch bell implementation is possible. Reference list of sealing element

Kupplungsglocke

elastomer body

passage

Through element

insertion

first diameter

sealing portion

second diameter

end

third diameter

splash cover

Sealing projection

twist

opening

inner wall

cavity

first fret

second fret

sealing lip

center

sealing seat

outer surface

sealing arrangement

wall

opening axis

Opening diameter

drive system

motor vehicle

Motor mounting area

Transmission mounting area

output shaft

powertrain

drive unit Driver's cab Longitudinal axis Motor axle Friction clutch Transmission Hydraulic hose

Claims

claims

1 . Sealing element (1) for a clutch bell (2), comprising a cylindrical

Elastomeric body (3) having a central passage (4) for a lead-through element (5), wherein the elastomeric body (3) has an insertion section (6) with a first

Diameter (7), a sealing portion (8) having a second diameter (9) and an end portion (10) having a third diameter (1 1), wherein the

Sealing portion (8) between the insertion portion (6) and the end portion (10) is arranged, and wherein the first diameter (7) is smaller than the second

Diameter (9) is.

Second sealing element (1) according to claim 1, wherein the third diameter (1 1) is smaller than the second diameter (9).

3. Sealing element (1) according to claim 1 or 2, wherein the elastomeric body (3) during

End portion (10) has a splash water cover (12).

4. sealing element (1) according to one of the preceding claims, wherein the

Insertion section (6) an axially extending sealing extension (13) is arranged.

5. Sealing element (1) according to one of the preceding claims, wherein a

Anti-rotation device (14) is provided, by means of which in the installation of the sealing element (1) a rotation of the sealing element (1) relative to a lead-through element (5) and / or relative to an opening to be sealed (15) can be prevented.

6. sealing element (1) according to one of the preceding claims, wherein the

Elastomer body (3) has an inner wall (16) with which a fluid-filled cavity (17) can be enclosed, wherein at the insertion section (6) and at

End portion (10) in each case a collar (18,19) is formed.

7. sealing element (1) according to claim 6, wherein in the cavity (17) at least one

Sealing lip (20) is provided, which is adapted to a

Passing element (5) in the center (21) sealingly abut.

8. feedthrough element (5) for passing into a clutch bell (2), comprising a sealing seat (22) with an outer surface (23) for a sealing element (1) according to claim 6 or 7, wherein the fluid - filled cavity (17) between the outer surface (23) and at least in the sealing portion (8) spaced inner wall (16) of the

Seal element (1) is bildbar.

9. sealing arrangement (24) for a clutch bell (2) comprising at least the following components:

- A wall (25) having an opening (15) with an opening axis (26) and an opening diameter (27), wherein the wall (25) preferably in the region of

Opening (15) is inclined and / or curved with respect to the opening axis (26);

a lead-through element (5) for passing through the opening (15) in the

Wall (25);

- A sealing element (1) according to one of the preceding claims, wherein the

Sealing element (1) has a first diameter (7) which is smaller than that

Opening diameter (27), and a second diameter (9) which is greater than the opening diameter (27),

wherein the lead-through element (5) can be enclosed by means of the sealing element (1) and the sealing element (1) with the lead-through element (5) can be inserted sealingly into the opening (15) of the wall (25).

10. clutch bell (2) for a drive system (28) of a motor vehicle (29), comprising at least the following components:

a motor mounting portion (30);

a gear mounting portion (31);

- A bell-like wall (25) between the engine mounting portion (30) and the transmission mounting portion (31), wherein in the bell-like wall (25) has a sealing arrangement (24) is introduced according to claim 9 and wherein the bell-like wall (25) in the region of the opening (15) is inclined to the opening axis (26) and is at least partially curved.