DE102018127916A1 - roller bearing - Google Patents

Abstract

The invention relates to a rolling bearing (1), comprising at least one bearing inner ring (2) and at least one bearing outer ring (3), rolling elements (4) being arranged between the bearing rings (2, 3), the rolling elements (4) being circumferential (U ) are kept at a distance by a segment cage, the segment cage consisting of a number of cage segments (5) and at least one of the cage segments (5) being designed to be resilient in the circumferential direction (U). In order to keep the noise during operation of the rolling bearing low, the invention provides that the at least one cage segment (5) which is designed to be resilient in the circumferential direction (U) has two sleeve-shaped contact elements (6, 7), each for contact with a rolling element ( 4), a separate spring element (8) being arranged between the contact elements (6, 7).

Description

Field of the Invention

The invention relates to a rolling bearing comprising at least one bearing inner ring and at least one bearing outer ring, rolling elements being arranged between the bearing rings, the rolling elements being kept at a distance in the circumferential direction by a segment cage, the segment cage consisting of a number of cage segments and at least one of the cage segments is designed to be resilient in the circumferential direction.

Background of the Invention

A rolling bearing of the generic type is from the US 1,220,616 known. The cage is designed here as a segment cage and has a number of cage segments. The individual cage segments have radially extending slots which result in a mechanical weakening of the segment and thus make it elastic in the circumferential direction.

The US 1,261,154 shows a solution that also uses a segment cage. In order to compensate for wear in the bearing, the segment is designed to be variable in length, which is accomplished, for example, by a screw.

With the previously known solutions, wear in the bearing can be partially compensated or the running behavior can be improved. However, there is a further need to achieve improved running behavior for a bearing of the type mentioned at the outset.

Object of the invention

The present invention is therefore based on the object of developing a generic roller bearing in such a way that the noise during operation of the bearing can be further reduced and kept low.

Summary of the invention

The solution to this problem by the invention is characterized in that the at least one cage segment which is designed to be resilient in the circumferential direction has two sleeve-shaped contact elements which are each designed or suitable for contact with a rolling element, a separate spring element being arranged between the contact elements.

All cage segments are preferably designed as described.

The spring element is preferably designed as a helical spring.

The contact elements are preferably made of plastic. An injection molding process is preferably used to manufacture them.

According to a further development, the contact elements have a cylindrical receptacle and an axial contact surface for the spring element.

The contact elements can also have a shape on their side facing the rolling element which corresponds to the shape of the rolling elements or is adapted to this.

With the proposed solution, the noise behavior of the bearing can be further improved.

Compared to previously known bearings, the bearing can now be provided with preloaded cage segments. The preloaded spring elements create a preload in the bearing unit. Accordingly, it advantageously results that the vibration behavior of the bearing is improved, i. H. it can be used in particular in applications in which correspondingly strong oscillations or vibrations occur. Nevertheless, only a little noise is achieved. The spring elements used are used to absorb corresponding vibratory movements.

The cage segments can be guided on the outer or on the inner raceway or on the inner ring or on the outer ring.

The proposed design enables the forces to be distributed evenly over the entire circumference of the bearing. This creates a preloaded bearing unit. The bearing is particularly suitable for strong accelerations or strong decelerations.

Ball bearings are a particularly preferred application for the proposed design.

Figure list

• 1 im Radialschnitt einen Teil eines Wälzlagers,
• 2 in der Seitenansicht einen Teil der benachbarten Kugeln samt Käfigsegmenten,
• 3 im Radialschnitt ein Käfigsegment des Lagers und
• 4 in perspektivischer Darstellung das Käfigsegment gemäß 3.

An exemplary embodiment of the invention is shown in the figures. Show it:

• 1 in radial section part of a rolling bearing,
• 2nd in the side view a part of the neighboring balls including cage segments,
• 3rd in radial section a cage segment of the bearing and
• 4th in perspective view of the cage segment 3rd .

Detailed description of the figures

In 1 is part of a rolling bearing 1 to see, namely a bearing inner ring 2nd and a bearing outer ring 3rd , being between the bearing rings 2nd , 3rd Rolling elements 4th are arranged in the form of balls. The individual rolling elements 4th are guided through a segment cage consisting of a number of cage segments 5 consists. The individual cage segments 5 follow in the circumferential direction U on top of each other, with cage segments 5 and rolling elements 4th alternate.

For the cage segments 5 special training is provided, which consists of the 2nd to 4th can be seen.

According to this, each cage segment exists 5 from two contact elements 6 and 7 between which a spring element 8th is effectively arranged. In the exemplary embodiment, the spring element 8th formed by a coil spring.

The two contact elements 6 and 7 are shaped identically, as can be seen in particular from the 3rd and 4th results. Each contact element has 6 , 7 to accommodate the axial end of the coil spring 8th a cylindrical receptacle 9 , ie a cylindrical seat, which is defined by an axial contact surface 10th is limited. Out 3rd it can be seen that accordingly the coil spring 8th in the cylindrical receptacle 9 of the contact element 6 7 is inserted until it is on the axial contact surface 10th is present.

The appropriately trained cage segments 5 are then assembled in the warehouse as it turns out 1 results.

Through the spring elements 8th becomes circumferential U an even preload of the rolling elements 4th reached against each other, so that the bearing is particularly not very susceptible to noise.

For a favorable start of the rolling element 4th on the contact element 6 , 7 has the contact element on the rolling element 4th facing side a contact surface 11 on how it out 4th can be seen. In the present case, the contact area 4th correspondingly formed spherical section after it is in the rolling elements 4th are balls.

Reference symbol list

1

roller bearing

2nd

Bearing inner ring

3rd

Bearing outer ring

4th

Rolling elements

5

Cage segment

6

Contact element

7

Contact element

8th

Spring element

9

cylindrical mount

10th

axial contact surface

11

Contact area

U

Circumferential direction

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included 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.

Patent literature cited

• US 1220616 [0002]
• US 1261154 [0003]

Claims (4)

Rolling bearing (1), comprising at least one bearing inner ring (2) and at least one bearing outer ring (3), rolling elements (4) being arranged between the bearing rings (2, 3), the rolling elements (4) in the circumferential direction (U) through a segment cage are kept at a distance, the segment cage consisting of a number of cage segments (5) and at least one of the cage segments (5) being designed to be resilient in the circumferential direction (U), characterized in that the at least one cage segment (resiliently designed in the circumferential direction (U) 5) has two sleeve-shaped contact elements (6, 7), which are each designed for contact with a rolling element (4), a separate spring element (8) being arranged between the contact elements (6, 7). Rolling bearing after Claim 1 , characterized in that the spring element (8) is designed as a helical spring. Rolling bearing after Claim 1 or 2nd , characterized in that the contact elements (6, 7) consist of plastic, which are preferably produced by an injection molding process. Rolling bearing according to one of the Claims 1 to 3rd , characterized in that the contact elements (6, 7) have a cylindrical receptacle (9) and an axial contact surface (10) for the spring element (8).

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