Cylinder head cap and method of installing cylinder head cap

Abstract

The invention relates to a cylinder head cover with an axial bearing (4) for a camshaft (3) in which the camshaft (3) is rotatably mounted, the camshaft (3) comprising at least one functional component (34, 35), the axial bearing (4) comprising at least one pin pair (41a, 41b and / or 42a, 42b) between which the functional component (34 or 35) is arranged, the invention also relates to at least one method for assembling the cylinder head cover according to the preceding claims, comprising the following steps: inserting the camshaft (3) with the functional component (34, 35) into the bearing half-shell (6) of the cylinder head cover body (1); inserting the pin (41a, 41b and / or 42a, 42b) into a receiving opening (43a, 43b, 43c, 43d) of the cylinder head cap body (1) or of the first cylinder head cap element (1a); the bearing bracket (2) or the second cylinder head cap element (1b) is placed on the cylinder head cap body (1) or the first cylinder head cap element (1a), wherein the pins (41a, 41b and / or 42a, 42b) are partially inserted into the receiving openings (44a, 44b, 44c, 44d) of the bearing bracket (2) or the second cylinder head cap element (1b).

Description

[0001] The invention relates to a cylinder cover, according to the preamble of claim 1, with an axial bearing for a camshaft, which bearing is rotatably mounted in the cylinder cover, and to a method for assembling a cylinder cover according to the preamble of claim 12.

[0002] For example, DE 10 2007 014 544 discloses an internal combustion engine with at least one camshaft having at least one retaining element for forming an axial bearing. Here, an internal combustion engine is described, which has at least one camshaft, which, in order to form an axial bearing, has at least one retaining element, which interacts with a bearing frame of the axial bearing for axial mounting, wherein the retaining element is formed by a cam of the camshaft, respectively, by a functional component of the camshaft, and the bearing frame has a cam-shaped clearance for the cam. Furthermore, the article also describes the use of at least one cam of a camshaft of an internal combustion engine as a retaining element for an axial bearing of the camshaft.

[0003] Although the possibilities for axial mounting of the camshaft have been pointed out here, there is still a need for improvement, in particular with regard to a more simplified assembly method and / or a more economical axial bearing and / or cylinder head cover.

[0004] According to the invention, this object is achieved by a cylinder cover having the features of claim 1. A low-cost axial bearing for a camshaft functional component is proposed, and depending on the way the functional component is connected to the rest of the camshaft, a low-cost axial bearing for a camshaft in a cylinder cover can also be proposed. This is because the axial bearing comprises at least one pair of pins, between which the functional component is arranged. The design of the component is also relatively simple, for example, the pins can be easily handled and assembled as standard components. In addition, the required pins can be produced as separate components at a relatively low cost. A further advantage with regard to expected wear is that the pins form a linear contact with the functional component, which is more defined than, for example, full-surface contact and also brings advantages in terms of reduced wear.

[0005] Further developments of the invention result in particular from the features of the respective dependent claims. The subjects and features of the different claims can basically be combined with one another in any desired manner.

[0006] In an advantageous development of the invention, the axial bearing comprises a further pair of pins, between which the functional component is mounted. The pairs of pins are preferably arranged on different sides of the camshaft. In this way, the functional component can be accessed in the pairs of pins mounted on both sides.

[0007] In a further development of the invention, the pin pair can be arranged perpendicularly to the rotation axis of the camshaft. Thus, for example, the bearing bracket which is usually placed on the cylinder head body from above will also be placed perpendicularly to the pin pair.

[0008] In a further development of the invention, provision can be made for the pins of a pin pair or the pins of a plurality of pin pairs to be partially accommodated in a receiving opening. The pins can simply be inserted into a receiving opening of this type, which can be a hole, for example.

[0009] A further improvement of the present invention is that at least one pin in the pin pair, preferably two pins in the pin pair, is rotatably mounted in the receiving opening. Thus, friction can be further reduced, the wear condition can be improved, i.e., wear can be reduced.

[0010] Another advantageous development of the present invention is that the cylinder cover comprises a cylinder cover body and a bearing frame, wherein both the cylinder cover body and the bearing frame have connector openings for the pins. This development makes assembly advantages possible. For example, the pins can be simply inserted into the connector openings of the cylinder cover body, and then the bearing cover is placed thereon so that the pins are inserted into their connector openings.

[0011] Another advantageous development of the invention is that the cylinder cover comprises a first cylinder cover element and a second cylinder cover element, wherein both the first cylinder cover element and the second cylinder cover element have connector openings for the pins. This development makes assembly advantages possible. For example, the pins can simply be inserted into the connector openings of the first cylinder cover element and then the second cylinder cover element is placed on top, with the result that the pins are inserted into their connector openings.

[0012] In a further development of the invention, the functional component can be a locking disk, a sensor wheel, a cam, in particular a pump blade.

[0013] Another advantageous development of the invention is that the camshaft is a sliding camshaft comprising a base shaft and at least one sliding cam, wherein the sliding camshaft in particular comprises two sliding cams which are connected to each other via a coupling rod.

[0014] Other features and advantages of the present invention will become more apparent from the following description of preferred exemplary embodiments with reference to the accompanying drawings:

[0015] Figure 1 A perspective view of a cylinder cover according to the invention is shown, in particular a functional component with a locking disk which is axially fixed by two pairs of pins,

[0016] Figure 2 A plan view showing a camshaft of a cylinder cover according to the invention with a locking disk which is axially fixed by an axial bearing comprising two pairs of pins,

[0017] Figure 3A perspective view of a camshaft of a cylinder cover according to the invention is shown with a locking disk which is axially fixed by an axial bearing comprising two pairs of pins,

[0018] Figure 4 shows a perspective view of a cylinder cover according to the invention, in particular a sensor wheel as a functional component which is axially fixed by two pins,

[0019] Figure 5 A perspective view of a camshaft of a cylinder head according to the invention is shown with a sensor wheel which is axially fixed by an axial bearing comprising two pin pairs,

[0020] Figure 6 A perspective view of a camshaft of a cylinder cover according to the invention is shown, with a sensor wheel and a locking plate, each of which is axially fixed by an axial bearing comprising two pin pairs,

[0021] Figure 6a A perspective view of a camshaft of a cylinder cover according to the invention is shown, the cylinder cover comprising a first cylinder cover element and a second cylinder cover element (for illustration purposes only the first cylinder cover element is shown here),

[0022] Figure 6b A perspective view of a camshaft of a cylinder cover according to the invention is shown, the cylinder cover comprising a first cylinder cover element and a second cylinder cover element, and

[0023] Figure 7-10 A schematic diagram of the assembly steps of a cylinder cover according to the present invention is shown.

[0024] The following references are used in the drawings:

[0025] D Camshaft rotation axis

[0026] 1Cylinder cover body

[0027] 2 Bearing frame

[0028] 3 Camshaft

[0029] 4Axial bearings

[0030] 5 Sliding spline system

[0031] 6 Bearing (half) housing, bearing seat or pivot bearing seat

[0032] 7 Actuator

[0033] 1a First cylinder cover element

[0034] 1b Second cylinder cover element

[0035] 31 base axis

[0036] 32(a) Sliding cam

[0037] 33 Connecting rod

[0038] 34 Locking plate (functional component)

[0039] 35 sensor wheel (functional component)

[0040] 321 First Cam

[0041] 322 Second Cam

[0042] 323 Actuating Guide Rail

[0043] 41a first pin

[0044] 41b Second pin

[0045] 42a first pin

[0046] 42b second pin

[0047] 43a Receiving opening

[0048] 43b Receiving opening

[0049] 43c receiving opening

[0050] 43d receiving opening

[0051] 44a Receiving opening

[0052] 44b Receiving opening

[0053] 44c receiving opening

[0054] 44d receiving opening

[0055] It goes without saying that features and details described in conjunction with the method also apply to the device according to the invention and vice versa, with the result that the disclosure of the various aspects of the invention always refers or can refer to each other. In addition, the method that may be described according to the invention can be implemented by the device according to the invention.

[0056] The terms used herein are only used to describe certain embodiments and are not intended to limit the disclosure of the present invention. The singular forms "a / an" and "the" used herein also include plural forms, unless the context clearly indicates otherwise. In addition, the expressions "having" and / or "having" used in this specification clearly indicate the presence of the features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof. As used herein, the expression "and / or" includes any required and all combinations of one or more of the relevant listed elements.

[0057] First reference Figure 1 .

[0058] According to the present invention, the cylinder head basically comprises a cylinder head body 1, a bearing frame 2 and a camshaft 3, and the camshaft 3 is rotatably mounted on the cylinder head.

[0059] For example, the camshaft 3 can be a sliding camshaft, comprising a base shaft 31, on which one or more sliding cams 32 are mounted axially displaceably, but not rotatably relative to the base shaft 31. For this purpose, a sliding spline system can be provided between the base shaft 31 and the sliding cam 32. Other embodiments can also be adopted, for example, a non-circular base shaft portion, in particular a flat position, and a corresponding opening for receiving the sliding cam 32 of the base shaft portion. The sliding cam 32 itself comprises an actuating guide 323, a first cam 321 and at least one second cam 322, which have different cam geometries. The sliding cam 32 is axially moved on the base shaft 31 by the actuator 7, so that the first cam 321 or the second cam 322 is brought into contact with the corresponding valve mechanism as required.

[0060] If, as shown, the two sliding cams 32, 32a are connected to one another via a coupling rod 33, a locking disk 34 is preferably used to ensure that the sliding cams 32, 32a or the coupling rod 33 can only be displaced in a predetermined angular position of the camshaft 3. The locking disk 34 is a functional component of the camshaft 3. Other conceivable functional components include sensor wheels, cams, in particular pump blades, etc. An axial bearing 4 is provided for corresponding axial guidance or fixing of the functional component, in particular the locking disk 34, relative to or on the cylinder head cover.

[0061] According to the invention, the axial bearing 4 is formed by at least one pin pair 41 a , 41 b , wherein the functional component 34 is arranged axially between the pins 41 a , 41 b of the pin pair.

[0062] In one embodiment, if the functional component 34 is arranged axially movably on the camshaft 3, it is guided relative to the cylinder cover or held in an axial position by the axial bearing 4 and can release the axially acting switching force from the push rod to the cylinder cover or support it on the cylinder cover. If the functional component 34 is arranged axially fixed on the camshaft 3, the axial bearing of the camshaft 3 can also be used to release / support the switching force. In other words, depending on whether the functional component 34 is axially fixedly mounted on the camshaft or axially movably mounted on the camshaft, the axial bearing 4 can realize the axial installation of the camshaft or only the axial installation of the functional component 34.

[0063] from Figures 1 to 3It can be seen that each pin pair includes a first pin 41a and a second pin 41b. It can be seen that the first pin 41a is arranged axially in front of the functional component 34, especially the locking disk, while a pin 41b is arranged behind the functional component 34.

[0064] Furthermore, it can be seen that the axial bearing comprises a further pin pair 42a, 42b, between which the functional component 34 is located. The pin pair also comprises a first pin 42a and a second pin 42b. It can be seen that the first pin 42a is arranged axially in front of the functional component 34, in particular the locking disk, while the second pin 42b is arranged behind the functional component 34. However, the pin pairs 41a, 41b and 42a, 42b are arranged on different sides of the camshaft 3. Furthermore, it can be seen that the pin pairs 41a, 41b and 42a, 42b are arranged perpendicularly with respect to the rotation axis D of the camshaft 3.

[0065] Furthermore, it is preferred that the pins of one pin pair or the pins of multiple pin pairs 41a, 41b and / or 42a, 42b are received in sections in the receiving openings 43a, 43b, 43c, 43d and / or 44a, 44b, 44c, 44d.

[0066] In the cylinder cover embodiment shown in the present figure, the cylinder cover comprises a cylinder cover body 1 and a bearing frame 2. The cylinder cover body 1 and the bearing frame 2 together substantially form a pivot bearing or pivot bearing seat 6 for the camshaft 3. The bearing frame 2 can be connected to the cylinder cover body 1 accordingly, for example by screws which can be seen.

[0067] Preferably, a pin pair or a plurality of pin pairs 41a, 41b and / or 42a, 42b are provided between the cylinder cover body 1 and the bearing frame 2. To this end, receiving openings 43a, 43b, 43c, 43d and / or 44a, 44b, 44c, 44d may be provided on the cylinder cover body 1 and the bearing frame 2 for the pin pair or a plurality of pin pairs 41a, 41b and / or 42a, 42b.

[0068] Figure 4 and Figure 5 Another embodiment of the cylinder cover according to the invention is shown. Here, the sensor wheel 35 is used as a functional component and is fixed in the axial direction by the axial bearing 4 according to the invention.

[0069] The sensor wheel 35 is fixed to the shaft 3 ; therefore, the axial bearing of the camshaft 3 can be realized by this component (transmission of forces to the cylinder cover).

[0070] For further details, reference may be made to the axial bearing of the locking disk 34 outlined above.

[0071] Figure 6An embodiment of a cylinder head cover according to the invention is shown, in which both the locking disk 34 and the sensor wheel 35 are fixed axially by means of the axial bearing 4 according to the invention. For more details, reference is made to the above-summarized axial bearing 4 of the locking disk 34 or the sensor wheel 35. For example, the locking disk 34 can be axially "movable / loose" on the camshaft 3 and serves to transmit displacement forces to the cylinder head cover.

[0072] If the sensor wheel 35, which is mounted axially fixed on the camshaft 3, is also guided by the pins 41 / 42 and is thus fixed relative to the camshaft, excessive stress or jamming may result. The camshaft 3 can be mounted axially. The camshaft can be guided axially in the cylinder head by the sensor wheel 35 fixed on the camshaft.

[0073] As described above, the cylinder cover is composed of a cylinder cover body 1 and a bearing frame 2. As an alternative, the cylinder cover can also include a first cylinder cover element 1a and a second cylinder cover element 1b. It can also be provided that the cylinder cover elements can be connected to each other, preferably by screws. Figure 6a and 6b This structure is shown.

[0074] It can be preferably provided that in all embodiments the pin pairs 41a, 41b and / or 42a, 42b are arranged perpendicularly to the rotation axis D of the camshaft 3, and that the pins of a pin pair or the pins of a plurality of pin pairs 41a, 41b and / or 42a, 42b or 44a, 44b, 44c, 44d and / or the pins of at least one pin pair, preferably both pins of the pin pair 41a, 41b and / or 42a, 42b, are rotatably mounted in the receiving openings 43a, 43b, 43c, 43d and / or 44a, 44b, 44c, 44d. The pins 41a, 41b and / or 42a, 42b can also be fixedly mounted in the receiving openings 43a, 43b, 43c, 43d and / or 44a, 44b, 44c, 44d.

[0075] The following will be based on Figures 7 to 10 The method of the present invention is explained in more detail. Figures 7 to 10 It goes without saying that only a few selected method steps are shown here, which help to understand the method of the present invention. The method may also include other steps or intermediate steps known to those skilled in the art.

[0076] Figure 7 A cylinder cover body 1 according to the invention is shown. The cylinder cover body 1 has receiving openings 43a, 43b and / or 44a, 44b for the pins 41a, 41b and / or 42a, 42b.

[0077] First, the camshaft 3 together with the functional components 34, 35 is inserted into the bearing half shell 6 of the cylinder head body 1 (see in particular Figure 8 ).

[0078] In a further method step, the pins 41a, 41b and / or 42a, 42b of the axial bearing 4 can be inserted in sections into the receiving openings 43a, 43b, 44a, 44b of the cylinder cover body 1 ( Fig. 9 ). They therefore protrude from the receiving opening of the cylinder cover body 1. The pins can also be inserted before the camshaft is inserted.

[0079] Subsequently, the bearing frame 2 is placed on the cylinder cover body 1. The bearing frame 2 and the cylinder cover body 1 together form a bearing seat or pivot bearing seat 6 for the camshaft 3. In addition, the pins 41a, 41b and / or 42a, 42b are inserted in sections into the receiving openings 43c, 43d and / or 44c, 44d of the bearing frame 2, thereby completing the assembly of the axial bearing 4 ( Fig.10 ).

[0080] The locking disk 34 is thus axially fixed. In the embodiment described here, the functional component, in particular the locking disk 34, is connected to the base shaft 31 of the camshaft 3 via a sliding spline system 5. Torques can be transmitted accordingly. However, the base shaft 31 and the locking disk 34 can be displaced relative to each other in principle.

[0081] In principle, the pins 41a, 41b and / or 42a, 42b can also be connected to the bearing frame 2 in advance and mounted on the cylinder head cover body 1 together with the bearing frame 2. The advantage of this is that the screwing operation of the pins 41a, 41b and / or 42a, 42b can be performed outside the cylinder head cover body 1, which makes the pins easier to operate. After the bearing frame is placed on top, the pins engage in the pin receiving openings 43a, 43b and / or 44a, 44b of the cylinder head cover body 1.

[0082] Finally, these method steps can also be applied to different or additional functional components, such as a sensor disk.

[0083] The functional components or functional assemblies 34, 35 can also be connected fixedly to the base shaft 31, so that the base shaft 31 and / or the camshaft 3 are ultimately also indirectly fixed axially in the cylinder head cover via the proposed axial bearing. Preferably, one of the functional components is fixedly connected and the other functional component is movably connected to the base shaft, so that static overstresses and / or thermal expansions are avoided. Figure 6b This structure is shown.

[0084] Although the method herein is summarized with respect to a structure composed of a cylinder cover main body 1 and a bearing bracket 2, the method is also applicable to a structure composed of a first cylinder cover element 1a and a second cylinder cover element 1b.

Claims

1. A cylinder head with a camshaft (3), the camshaft (3) being rotatably mounted in the cylinder head, wherein the camshaft is provided with a functional component (34, 35), the functional component being axially fixed to the camshaft (3), or provided with a functional component (34, 35), the functional component being axially movably mounted on the camshaft (3), characterized in that: The axial bearing (4) comprises at least one pair of pins (41a, 41b and / or 42a, 42b), and the functional component (34 or 35) is mounted between the pair of pins.

2. The cylinder cover according to claim 1, characterized in that: The pin pair includes a first pin (41a or 42a) and a second pin (41b or 42b).

3. The cylinder head according to at least one of the preceding claims, characterized in that The axial bearing comprises a further pair of pins (42a, 42b) between which the functional component (34 or 35) is arranged.

4. Cylinder head according to at least one of the preceding claims, characterized in that The pin pairs (41a, 41b and 42a, 42b) are arranged perpendicularly with respect to the rotation axis (D) of the camshaft (3).

5. Cylinder head according to at least one of the preceding claims, characterized in that The pins of one pin pair or the pins of a plurality of pin pairs (41a, 41b and / or 42a, 42b) are received in sections in the receiving openings (43a, 43b, 43c, 43d, 44a, 44b, 44c, 44d).

6. Cylinder head according to at least one of the preceding claims, characterized in that At least one pin of the pin pair (41a, 41b and / or 42a, 42b), preferably both pins of the pin pair, are rotatably received in the receiving opening (43a, 43b, 43c, 43d, 44a, 44b, 44c, 44d).

7. Cylinder head according to at least one of the preceding claims, characterized in that The cylinder cover comprises a cylinder cover body (1) and a bearing frame (2), wherein both the cylinder cover body (1) and the bearing frame (2) have connecting openings (43a, 43b, 43c, 43d, 44a, 44b, 44c, 44d) for pins (41a, 41b and / or 42a, 42b).

8. Cylinder head according to at least one of the preceding claims, characterized in that The cylinder cover comprises a first cylinder cover element (1a) and a second cylinder cover element (1b), wherein the first cylinder cover element (1a) and the second cylinder cover element (1b) are both provided with connector openings (43a, 43b, 43c, 43d, 44a, 44b, 44c, 44d) for pins (41a, 41b and / or 42a, 42b).

9. Cylinder head according to at least one of the preceding claims, characterized in that The functional components are a locking disk (34), a sensor wheel (35), a cam, and in particular a pump blade.

10. The cylinder head according to at least one of the preceding claims, characterized in that The camshaft is a sliding camshaft comprising a base shaft (31) and at least one sliding cam (32, 32a), wherein the sliding camshaft particularly comprises two sliding cams (32, 32a) which are connected to each other via a coupling rod (33).

11. Cylinder head according to at least one of the preceding claims, characterized in that The functional components (34, 35) can be selectively fixed or axially displaceably connected to the camshaft (3).

12. Method for assembling a cylinder head according to at least one of the preceding claims, comprising the following method steps: - inserting the camshaft (3) with the functional components (34, 35) into the bearing half-shell (6) of the cylinder head body (1); - inserting the pins (41a, 41b and / or 42a, 42b) into receiving openings (43a, 43b, 43c, 43d) of the cylinder cover body (1) or the first cylinder cover element (1a); - Placing the bearing frame (2) or the second cylinder cover element (1b) onto the cylinder cover body (1) or the first cylinder cover element (1a), wherein the pins (41a, 41b and / or 42a, 42b) are partially inserted into receiving openings (44a, 44b, 44c, 44d) of the bearing frame (2) or the second cylinder cover element (1b).

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