Cage for a crankshaft bearing or connecting-rod bearing of an internal combustion engine or of a compressor

Abstract

A cage for a crankshaft bearing or a connecting-rod bearing of an internal combustion engine or for a compressor has a plurality of receiving pockets for guiding bearing rolling elements and has an axial width. The cage includes at least first and second cage segments, each cage segment having a segment axial width equal to the axial width of the cage and having a first end circumferentially spaced from a second end, the first cage segment first end being connected to the second cage segment second end by an interference fit and the first cage segment second end being connected to the second cage segment first end by an interference fit.

Claims

1. A cage for a crankshaft bearing or a connecting-rod bearing of an internal combustion engine or for a compressor, the cage comprising a plurality of receiving pockets for guiding bearing rolling elements and having an axial width, wherein, the cage includes at least one first cage segment and at least one second cage segment, each cage segment having a segment axial width equal to the axial width of the cage and having a first end circumferentially spaced from a second end, the first cage segment first end being connected to the second cage segment second end by an interference fit, and the first cage segment second end being connected to the second cage segment first end by an interference fit, wherein the first cage segment first end includes at least one projection and the second cage segment second end includes at least complementary recess, the projection being received in the recess, wherein the first cage segment first end includes a first axial portion and a second axial portion, and wherein the at least one projection of the first cage segment comprises a radially inwardly facing projection on the first axial portion and a radially outwardly facing projection on the second axial portion, wherein the first axial portion extends axially inward from a first side of the first cage segment and the second axial portion extends axially inward from a second side of the first cage segment, wherein an axial width of the first axial portion is equal to an axial width of the second axial portion and equal to one half the axial width of the cage segment, and wherein the at least one projection of the first cage segment first end fills the complementary recess of the second cage segment second end.

2. The cage according to claim 1, wherein the cage comprises no cage segments other than the first cage segment and the second cage segment.

3. The cage according to claim 1, wherein the interference-fit connection is a clip connection.

4. The cage according to claim 1, wherein the first cage segment first end includes a recess circumferentially spaced from the at least one projection.

5. The cage according to claim 1, wherein the first cage segment is identical to the second cage segment.

6. The cage according to claim 1, wherein the bearing rolling elements are cylindrical rollers or needle rollers.

7. The cage according to claim 1, wherein a circumferential end of the at least one projection of the first cage segment is chamfered.

8. A bearing comprising: a bearing inner ring; a bearing outer ring; a cage according to claim 1; and a plurality of roller elements mounted in the receiving pockets.

9. A cage for a crankshaft bearing or a connecting-rod bearing of an internal combustion engine or for a compressor, the cage comprising a plurality of receiving pockets for guiding bearing rolling elements and having an axial width, wherein, the cage includes a first cage segment and a second cage segment, the second cage segment being substantially identical to the first cage segment, each of the first and second cage segments comprising: a first end and a second end circumferentially spaced from the first end, the first end including a first axial portion and a second axial portion, the first axial portion including a first hook having a hook end and a radially outward facing bight and the second axial portion including a second hook having a hook end and a radially inwardly facing bight, the second end including a first axial portion and a second axial portion, the first axial portion of the second end including a third hook having a hook end and a radially inwardly facing bight and the second axial portion of the second end including a fourth hook having a hook end and a radially outwardly facing bight, wherein the hook end of the of the first hook of the first cage segment is received in and fills the bight of the third hook of the second cage segment and wherein the hook end of the second hook of the first cage segment is received in and fills the bight of the fourth hook of the second cage segment, wherein the bight of the first hook extends axially inward from an axially outer side of the first cage segment, wherein the hook end of the first hook has an axial width equal to an axial width of the bight of the first hook, and wherein the axial width of the hook end of the first hook is equal to one half the axial width of the cage.

10. The cage according to claim 9, wherein the hook end of the first hook has a chamfered portion spaced from the bight of the first hook.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) An exemplary embodiment of the disclosure is depicted in the drawings.

(2) FIG. 1 is an exploded perspective view of a cage for a crankshaft bearing assembly formed of two cage segments.

(3) FIG. 2 is an enlarged section of one of the joints of FIG. 1.

(4) FIG. 3 is an enlarged perspective view of an axial end region of one of the cage segments.

DETAILED DESCRIPTION

(5) FIG. 1 illustrates a cage 1 comprising two cage segments 1 and 1, which when joined form the cage 1. In this embodiment the two cage segments 1, 1 are identical; for example, they may be produced by the same injection mold.

(6) The cage 1 includes receiving pockets 2 for rolling elements (not illustrated).

(7) The two cage segments 1, 1 can be joined at first and second joints 3 and 4 that are circumferentially offset from each other by about 180. The connection between the cage segments 1 and 1 at the first and second joints 3, 4 is effected by an interference-fit connection in the manner of a clip connection as shown in detail in FIGS. 2 and 3.

(8) As illustrated in FIG. 3, the circumferentially spaced ends of each cage 1 and 1 each extend generally in an axial direction and can be thought of as having first and second adjacent axial regions a.sub.1 and a.sub.2. The axial regions preferably have the same lengththat is, the end faces of the cage segments are divided axially in half.

(9) Hook-shaped projections 5, 5, 5, and 5 are disposed in the first and second axial regions a.sub.1 and a.sub.2 and recesses 6, 6, 6, and 6 are disposed respectively adjacent to these hook-shaped projections 5, 5, 5, and 5. As can be seen from the figures, the end regions of the two cage segments 1, 1, can be pushed onto each other as the two ring segments are pushed together to form a ring, so that simultaneously: the hook-shaped projection 5 latches into the recess 6, the hook-shaped projection 5 latches into the recess 6, the hook-shaped projection 5 latches into the recess 6, and the hook-shaped projection 5 latches into the recess 6.

(10) This results in an uninterrupted hollow-cylindrical section in the region of the joints 3, 4, and a stable cage comprising the first and second cage segments 1, 1. At a given end of one of the cage segments, the projections, e.g., 5 in the first axial region a.sub.1 extend in a radially opposite direction from the projections, e.g., 5 in the second axial region a.sub.2. The hook-shaped projections may also be described as hooks that have hook end portions and bights; that is, the aforementioned recesses may be described as bights or bight portions of a hook-shaped structure.

(11) As will be appreciated from the figures, each cage segment has two snap lugs (projections) on each circumferential end. The cage is radially mountable on any shaft by simply pressing the two cage segments against each other until they snap together. The locking mechanism substantially prevents movement, and no special device is required for holding the two cage halves together during assembly in the housing or with connecting rod installation.

(12) The bearing described is preferably used at a location for supporting the crankshaft in the housing of an internal combustion engine. The bearing can be used in the same way to support either end of a connecting rod including at its big-end bore (eye) on the journal which is a component of the crankshaft.

(13) Representative, non-limiting examples of the present invention were described above in detail with reference to the attached drawings. This detailed description is merely intended to teach a person of skill in the art further details for practicing preferred aspects of the present teachings and is not intended to limit the scope of the invention. Furthermore, each of the additional features and teachings disclosed above may be utilized separately or in conjunction with other features and teachings to provide improved bearings.

(14) Moreover, combinations of features and steps disclosed in the above detailed description may not be necessary to practice the invention in the broadest sense, and are instead taught merely to particularly describe representative examples of the invention. Furthermore, various features of the above-described representative examples, as well as the various independent and dependent claims below, may be combined in ways that are not specifically and explicitly enumerated in order to provide additional useful embodiments of the present teachings.

(15) All features disclosed in the description and/or the claims are intended to be disclosed separately and independently from each other for the purpose of original written disclosure, as well as for the purpose of restricting the claimed subject matter, independent of the compositions of the features in the embodiments and/or the claims. In addition, all value ranges or indications of groups of entities are intended to disclose every possible intermediate value or intermediate entity for the purpose of original written disclosure, as well as for the purpose of restricting the claimed subject matter.

REFERENCE NUMBER LIST

(16) 1 Cage 1 Cage segment 1 Cage segment 2 Receiving pocket 3 Joint 4 Joint 5 Hook-shaped projection 5 Hook-shaped projection 5 Hook-shaped projection 5 Hook-shaped projection 6 Recess 6 Recess 6 Recess 6 Recess a.sub.1 First axial region a.sub.2 Second axial region a Axial extension of the cage/cage segment U Circumferential direction r Radial direction