DE102009041395A1 - Bearing cover insert for crankshaft bearing of internal combustion engine, comprises two holes in side surface, where bearing cover insert is divided into multiple insertion elements - Google Patents

Abstract

The bearing cover insert (1) comprises two holes (6,6') in a side surface. The bearing cover insert is divided into multiple insertion elements (2,3) by a cutting surface running through one of the two holes. The holes are provided in a continuous manner. A recess (5) is provided in the side surface.

Description

The present invention relates to a bearing cover insert for a crankshaft bearing of an internal combustion engine, which has at least two holes in a side surface, according to the preamble of claim 1.

Such a bearing cover insert is for example from the DE 102 59 747 A1 known. The insert is intended to be cast in the region of a bearing cap in a crankcase made of a light metal material to give the bearing cap better material properties, such as strength, modulus of elasticity and thermal expansion coefficient. Here, the insert is cast in such a way that a layer of the light metal is provided between an outer surface of the light metal crankcase and an outer surface of the cast-in insert, so the insert is completely surrounded by the Umgussmaterial of light metal. Through holes are provided in the insert through which appropriate fasteners, such as fittings, can be inserted therethrough to securely attach the bearing cap to the crankcase.

The insert may for example be made of a porous material, such as a ceramic or sintered material, so that during the pouring process, the liquid light metal can penetrate the sintered insert and thus ensures a firm bond between the two materials. Subsequent machining of the insert for providing the through holes by drilling is made difficult due to the properties of the porous material or caused due to the special material properties for a short life of the tool used in the machining.

Against this background, it is the object of the present invention to provide a bearing cap insert which is easier and cheaper to manufacture.

This object is achieved in a bearing cover insert of the type described input according to the invention that the bearing cover insert part is divided by a running through at least one of the two holes separating surface into a plurality of insert elements.

The essential idea of the present invention is thus that individual insertion elements can be provided in such a way from a correspondingly suitable base material, so that a subsequent machining can be facilitated or simplified. The individual insert elements are assembled before the pouring to the bearing cover insert that is now available in its entirety for the Eingießvorgang.

In an advantageous embodiment of the bearing cap insert according to the invention, the holes are provided throughout to allow a more stable attachment of the bearing cap to a crankcase by means of completely continuous fastening devices.

A preferred embodiment of the bearing cover insert according to the invention has a recess in the side surface, so that the bearing cover insert part at least partially comprises the crankshaft bearing of the internal combustion engine. As a result, the positive improvement of the material properties, in particular in terms of strength and / or elasticity continues to drive.

In order to allow a penetration of the insert with the liquid Umgussmaterial of a light metal alloy in the pouring process, the insert elements according to the invention are preferably made of a porous material, for example of a sintered and / or ceramic material.

In order to prevent slippage or displacement of the individual insertion elements to one another during the casting process, the insert elements according to the invention are advantageously at least partially connected to one another at the parting surface by means of an adhesive bond. Alternatively and / or additionally, other fixings of the individual bearing cover inserts can be used to each other, for example, snaps, screw and / or clamps.

A particularly stable bond between the Ummussmatrial of light metal and the insert elements can be achieved that between the insert elements according to the invention, a gap is provided, which is filled in the pouring process by the Umgussmaterial.

For secure positioning of the bearing cap insert during the Eingießvorganges is preferably provided that further holes are provided in the side surface of the bearing cap insert member according to the invention, which can serve to receive retaining pins.

In order to be able to position the insert elements reliably relative to one another, in a preferred embodiment at least one projection and at least one complementary recess are provided on the insert elements.

The invention will be explained in more detail below by way of example with reference to a detailed description of an embodiment with reference to the attached drawings, in which:

1 shows a plan view of an inventive bearing cover insert with two insert elements;

2 a perspective view of the insert element according to the invention 1 shows; and

3 a cross-sectional view of the bearing cover insert according to the invention 1 in a bearing cap.

In 1 is a plan view of an inventive bearing cover insert 1 reproduced from a first insert element 2 and a second insert element 3 is composed. In the middle area around the midline 4 around is a recess 5 provided in the after pouring the bearing cap insert 1 in an infusion (see 3 ) A shaft bearing, for example, for a crankshaft of an internal combustion engine, may be provided.

On the side next to the recess there are first holes on each side 6 . 6 ' and second holes 7 . 7 ' arranged as through holes. During the pouring process, these holes can 6 . 6 ' respectively. 7 . 7 ' be completely filled with the Umgussmaterial, such as a light metal alloy. After solidification of the casting material can then be introduced into the light metal solid material by machining, for example by drilling, the final through-holes can be pushed through the correspondingly suitable bolts and / or screws to the encapsulation with cast-in bearing cover insert 1 on a housing, for example on a crankcase of an internal combustion engine, stable and secure to secure.

In the further course in the outer direction are in the embodiment of the bearing cover insert member according to the invention 1 even more, additional holes 8th . 8th' provided, which serve for receiving retaining pins (not shown) to the bearing cover insert 1 safe and reliable positioning during the pouring process.

In the presentation of the 1 is clearly seen that the first insert elements 2 and the second insert element 3 spaced apart, whereby in the region of a parting surface 9 In the illustrated embodiment, a gap is formed. In the pouring process, this gap is also filled with the light metal material of the Umgussteils. As in the present embodiment, the two insertion elements 2 and 3 are preferably made of a porous material, such as a ceramic or sintered material, is produced in the pouring the Umgussmaterial the two insertion elements 2 and 3 penetrate and thus form a continuous light metal matrix. Furthermore, the insert elements 2 and 3 at the interface 9 be joined together by at least partial adhesion. Then, at least in the areas without adhesive at the interface 9 form a very thin gap.

In 2 is the insert element according to the invention 2 out 1 reproduced in a perspective view. In this illustration, the recess 5 for the shaft bearing clearly visible on a side surface 10 of the bearing cap insert 1 and the insert element 2 is provided.

Laterally next to the recess 5 are approximately semicircular first grooves 11 . 11 ' intended. This first grooves 11 . 11 ' of the first inserting item 2 form together with corresponding grooves of the second insert element 3 the first holes 6 . 6 ' for the insert 1 , Accordingly, adjacent second grooves 12 . 12 ' in the first insert element 2 provided with corresponding second grooves in the second insert 3 the second holes 7 . 7 ' of the insert 1 form. Of the 2 is removable, that the grooves 11 . 11 ' respectively. 12 . 12 ' along the entire insertion element 2 extend and thus the corresponding holes 6 . 6 ' respectively. 7 . 7 ' of the bearing cap insert 1 Through holes are.

In addition, located in the outer end portions of the insert element 2 in about semicircular part grooves 13 . 13 ' , which together with corresponding part grooves in the second insert element 3 the blind hole-like, further holes 8th . 8th' form. Near the partial groove 13 ' is an approximately cylindrical projection 14 educated. A complementary depression 15 is near the partial groove 13 intended. The lead 14 of the first insert element 2 can with a complementary recess in the second insert element 3 engage while the indentation 15 of the first insert element 2 with a complementary projection in the second insert element 3 engaged. Other positions for the lead 14 and the complementary well 15 may also be provided, for example in the region of the recess 5 ,

In the manufacture of insert elements 2 and 3 From a sintered material, the grooves can 11 . 11 ' and 12 . 12 ' as well as the partial grooves 13 . 13 ' in a simple and inexpensive way without machining reworking already during prototyping getting produced. The insert elements 2 and 3 are preferred with respect to the centerline 4 formed symmetrically, so that the two insert elements 2 and 3 are identical in their design.

The 3 shows a cross-sectional view of the inventive Lagerdeckel-Einlegeteils 1 out 1 in one in a Umgussteil 16 cast condition. The Umgussteil 16 is in the present example a bearing cap for a crankcase of an internal combustion engine. In the area of the recess 5 is made by material of the casting 16 a shaft bearing 17 for a crankshaft (not shown) is formed.

LIST OF REFERENCE NUMBERS

1

Bearing cover insert

2

first insert element

3

second insert element

4

center line

5

recess

6, 6 '

first holes

7, 7 '

second holes

8, 8 '

more holes

9

interface

10

side surface

11, 11 '

first grooves

12, 12 '

second grooves

13, 13 '

part grooves

14

head Start

15

deepening

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 10259747 A1 [0002]

Claims (8)

Bearing insert for a crankshaft bearing of an internal combustion engine, which in a side surface ( 10 ) at least two holes ( 6 . 6 ' ), characterized in that the bearing cover insert part ( 1 ) through at least one of the two holes ( 6 . 6 ' ) separating surface ( 9 ) in several insert elements ( 2 . 3 ) is shared. Bearing insert according to claim 1, characterized in that the holes ( 6 . 6 ' ) are provided throughout. Bearing insert according to claim 1 or 2, characterized in that in the side surface ( 10 ) a recess ( 5 ) is provided. Bearing cover insert according to one of the preceding claims, characterized in that the insert elements ( 2 . 3 ) are made of a porous material. Bearing cover insert according to one of the preceding claims, characterized in that the insert elements ( 2 . 3 ) at the interface ( 9 ) are at least partially connected to each other by means of an adhesive bond. Bearing insert according to one of the preceding claims, characterized in that between the insert elements ( 2 . 3 ) A gap is provided. Bearing insert according to one of the preceding claims, characterized in that in the side surface two further holes ( 8th . 8th' ) are provided for receiving retaining pins. Bearing cover insert according to one of the preceding claims, characterized in that on the insert elements ( 2 . 3 ) at least one projection ( 14 ) and at least one complementary depression ( 15 ) are provided.

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