Transportation fixture unit, method for attaching same, and method for installation

Abstract

A transport fixture unit (10) is proposed for fixing rollers (12) in a rolling bearing cage (14) when transporting only the unit (16) formed by the rolling bearing cage, the rollers and the transport fixture unit, wherein the transport fixture unit is formed separately from the rolling bearing cage.

Description

Technical Field

[0001] The application relates to a transport securing unit, a method for attaching a transport securing unit and a method for mounting a roller. Background Art

[0002] Publication DE 10 2011 088 720 A1 relates to a rolling-element bearing cage comprising a cage ring and a plurality of separating bridges that project from the cage ring and, together with the cage ring, form pockets for receiving rolling elements. The rolling-element bearing cage is characterized by a plurality of retaining brackets that are formed separately from the cage ring and the separating bridges. The retaining brackets are attached to the ends of the separating bridges facing away from the cage ring and engage circumferentially behind one or two pockets adjacent to the respective separating bridges to prevent the rolling elements to be received in the pockets from falling out. The retaining brackets provide a transport securing function. Summary of the Invention

[0003] The object of the present invention is in particular to achieve increased efficiency. This object is achieved inventively by the following features of the transport-fixed unit.

[0004] A transport securing unit is proposed for securing rollers in a rolling bearing cage during single transport of a unit formed by the rolling bearing cage, rollers, and transport securing unit. The transport securing unit is a separate structural unit from the rolling bearing cage. This allows for high efficiency. In particular, with a structurally simple design, particularly a simple cage design, since transport is not a problem due to the transport securing unit, filling the rolling bearing cage with rollers can be performed away from the assembly line for assembling the rolling bearings. Furthermore, it is particularly possible to retrofit already-series-produced cages without having to change the cage design. In particular, since there is no need to redesign the cage and, therefore, replace complex injection molding tools, the cost of transport securing can be reduced.

[0005] Furthermore, a transport fixture is proposed, in particular as an improvement on the already mentioned transport fixture, wherein the transport fixture comprises a plurality of tongue-shaped elements which are spaced apart from one another in the circumferential direction of the transport fixture. In this way, a high efficiency can be achieved. In particular, a simple attachment and structurally simple design of the transport fixture can be achieved.

[0006] Preferably, the transport fixture comprises at least one annular region at which at least two of the tongue-shaped elements are attached. Thereby, an economical design can be achieved.

[0007] Advantageously, the plurality of tongue-shaped elements each comprises at least one tip which is elastically deflectable radially inwards with respect to a central axis of the annular region, wherein the central axis extends in the axial direction of the annular region. Thereby, a simple reduction of the diameter of the transport fixture at one of its ends only can be achieved.

[0008] Furthermore, a unit comprising such a transport fixture as well as a rolling bearing cage and rollers is proposed.

[0009] Preferably, the transport fixture fixes the rollers captively in the pockets of the rolling bearing cage. Thereby, the positioning of the rollers in the cage can be achieved / performed away from the final assembly line of the rolling bearing.

[0010] Advantageously, the unit consists of the transport fixture, the rolling bearing cage and the rollers, and / or the unit is self-retaining. Thereby, a compact structure can be achieved.

[0011] Preferably, the transport fixture comprises radially outer-lying regions which are configured to abut against the rollers in the state in which the transport fixture fixes the rollers captively in the pockets of the cage. Thereby, an abutment surface for the rollers can be provided on all sides.

[0012] Furthermore, a method for attaching a transport securing unit to a cage comprising rollers is proposed, wherein at least a portion of the transport securing unit is arranged within the cage and within the group of rollers, relative to the radial direction of the cage. This method achieves high efficiency and, in particular, low securing effort. Furthermore, the transport securing unit can be particularly reusable.

[0013] Furthermore, a method for assembling a roller set is proposed, wherein the roller set is secured in a cavity of a rolling bearing cage by a transport securing unit and the rolling bearing cage resting against the inner ring of the rolling bearing. The rolling bearing cage and the rollers are pressed against the inner ring, thereby removing (removing / detaching) the transport securing unit. This allows for high efficiency and, in particular, low assembly costs.

[0014] Further advantages are presented in the following description of the drawings. The drawings depict exemplary embodiments of the present invention. The drawings, the description, and the claims contain many combined features. A person skilled in the art will also advantageously consider the individual features and combine them into other meaningful combinations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 shows a perspective view of a transport securing unit,

[0016] Figure 2 a perspective view showing a partial section of the inner ring and the unit comprising the transport securing unit, the cage and the rolling elements in the state during assembly,

[0017] Figure 3 shows a perspective view of the unit, and

[0018] Figure 4 An axial section is shown in the state prior to installation.

[0019] 10 transport fixed units

[0020] 12 rollers

[0021] 14 Rolling bearing cage

[0022] Unit 16

[0023] 18 components

[0024] 20 circumferential direction

[0025] 22 areas

[0026] 24 end

[0027] 26 axial direction

[0028] 28 Central axis

[0029] 30 cavity grid

[0030] 32 areas

[0031] 34 inner circle

[0032] 36 Bridge

[0033] 38 rollers

[0034] 40 Insertion bevel

[0035] 42 end

[0036] 44 Bevel surface DETAILED DESCRIPTION

[0037] Figure 1 A perspective view of a transport-securing unit 10 is shown, which is suitable for securing a roller in a rolling-element bearing cage 14 ( Figures 2 to 4 ). The transport-fixing unit comprises an annular area 22, to which a plurality of tongue-shaped elements 18 are attached. More specifically, the tongue-shaped elements 18 are formed as one-piece with the area 22. Furthermore, the tongue-shaped elements 18 are arranged evenly spaced apart from one another in the circumferential direction 20 of the transport-fixing unit. The main extension direction of the tongue-shaped elements extends substantially in the axial direction 26 of the annular area 22. Furthermore, the tongue-shaped elements each comprise a tip 24, which is located at an axial end opposite to the annular area. Relative to the center axis 28, the tongue-shaped elements can each be elastically deflected (deflectable) radially inwardly relative to the annular area.

[0038] The rollers are tapered rollers of a tapered roller bearing. In a state where the unit consisting of the rolling bearing cage 14, the rollers 12 arranged in the pockets 30 of the rolling bearing cage 14, and the transport securing unit is to be transported, in order to prevent the rollers from falling out of the pockets, the tongue-shaped elements are arranged radially inside the rolling bearing cage. Figure 2 and Figure 3). Here, the tongue-shaped element ensures that the rollers do not fall out of the cavity in the radial direction inward. For this purpose, the transport securing unit includes a radially outer-lying region 32, against which the rollers rest, and which will be moved radially inward by a force (for example, gravity). At the bridge 36 of the rolling bearing cage 14 that delimits the cavity in the circumferential direction, the rolling bearing cage 14 includes a region that prevents the rollers from moving out of the cavity in the radial direction. In this way, the transport securing unit cooperates with the rolling bearing cage 14 to securely (captively) secure the rollers in the cavity. The transport securing unit is an element formed separately from the rolling bearing cage 14. In addition, it is formed as an integral piece. In the above-described design of the unit, the unit is self-retaining. For this purpose, the tongue-shaped element is held in the area 32 behind the roller, thereby preventing the transport securing unit from falling out in the axial direction from the end 24 toward the annular area 22. At the same time, the annular area bears against the end side of the rolling bearing cage 14, so that the transport securing unit cannot move relative to the rolling bearing cage 14 and the roller 12 in the other axial direction from the annular area toward the end. As a result, the rolling bearing cage, the roller, and the transport securing unit are attached to one another and are therefore self-retaining.

[0039] To install the unit consisting of rolling-element bearing cage 14, rollers 12, and transport securing element, the rollers are first arranged in the cell. Subsequently, the transport securing element, with its end 24, is initially introduced axially centrally into the rolling-element bearing cage 14 at the first opening of the central through-hole of the rolling-element bearing cage 14. The first opening of the through-hole is opposite the second opening of the central through-hole, with the first opening having a smaller diameter than the second opening. As the tongue-shaped element moves into the through-hole, it strikes the rollers. Here, the tongue-shaped element is elastically deflected radially inward, allowing the transport securing element to be introduced further axially into the cage. This continues until the annular region contacts the end face of the rolling-element bearing cage 14. The aforementioned position in which the unit is self-retaining is then reached.

[0040] By mounting the rolling bearing cage 14 and the rollers 12 on the inner ring 34 of the tapered roller bearing ( Figure 2 and Figure 4), the (transport securement) unit including the end 24 is moved forward in the axial direction 26 toward the side of the inner ring with the smaller diameter until the end 24 contacts the inner ring. A force is then applied again in the axial direction 26 to the rolling bearing cage 14 and the rollers 12, pressing the end 24 radially inwards and causing the rolling bearing cage and the rollers to slide over the end 24 onto the inner ring, while also positioning the rollers 12 within the cells and preventing further movement of the transport securement unit in the axial direction 26 by the end side of the inner ring. The transport securement unit is thus removed (removed / detached) from the rolling bearing cage 14 and the rollers 12. Consequently, the rollers also move upwards into position in the raceways 38 of the inner ring 34.

[0041] The individual tongue-shaped elements 18 are constructed geometrically identically. They each comprise a radially outer tip 42. At the axial end opposite the annular region 22, an insertion bevel 40 is arranged, which is formed by a radially outer surface extending obliquely with respect to the axial direction 28 ( Figure 4 and Figure 2 An inclined surface 44, arranged axially between the end 42 and the annular region, is also radially outwardly disposed and, during the mounting of the rolling bearing cage 14 and the rollers 12 on the inner ring 34, together with the region 32, ensures a resilient radially inward deflection of the tongue-shaped element, allowing the rolling bearing cage and the rollers to be stripped off in the axial direction. When the transport securing unit is removed from the rolling bearing cage 14 and the rollers 12, the end 42 is arranged radially outwardly of the inclined surface 44 and the insertion ramp 40.

[0042] The transport securing unit is formed from plastic.

Claims

1. A transport securing unit (10) for securing the roller (12) in the rolling bearing cage (14) when only the unit (16) formed by the rolling bearing cage, the roller and the transport securing unit is transported, wherein: The transport securing unit is formed separately from the rolling bearing cage, The transport fixing unit comprises a plurality of tongue-shaped elements (18) and at least one annular area (22), each of the plurality of tongue-shaped elements comprising at least one end (24), the at least one end (24) being elastically deflectable inwardly relative to the annular area in a radial direction relative to a central axis (28) of the annular area, wherein the central axis (28) of the annular area extends in an axial direction of the annular area.

2. The transport fixing unit according to claim 1, characterized in that: The plurality of tongue-shaped elements (18) are spaced apart from one another in a circumferential direction (20) of the transport securing unit.

3. The transport fixing unit according to claim 2, characterized in that: At least two of the tongue-shaped elements are attached at the at least one annular area (22).

4. A unit (16) for transporting rolling bearing cages and rollers, comprising the transport fixing unit according to any one of claims 1 to 3 and the rolling bearing cage and the rollers.

5. The unit for transporting rolling bearing cages and rollers according to claim 4, characterized in that The transport securing unit securely secures the roller in the cavity (30) of the rolling bearing cage.

6. The unit for transporting rolling bearing cages and rollers according to claim 4 or 5, characterized in that The unit for transporting rolling-element bearing cages and rollers consists of the transport-fixing unit, the rolling-element bearing cage and the rollers, and / or the unit for transporting rolling-element bearing cages and rollers is self-sustaining.

7. The unit for transporting rolling bearing cages and rollers according to claim 4 or 5, characterized in that The transport securing unit comprises a radially outer region (32) configured to abut against the roller when the transport securing unit securely secures the roller in the cell of the cage.

8. A method for attaching a transport securing unit, in particular a transport securing unit according to any one of claims 1 to 3, to a cage comprising rollers, wherein: At least a portion of the transport securing unit is arranged inside the cage and inside the group of rollers with respect to a radial direction of the cage.

9. A method for assembling a roller set, wherein the roller set is fixed in a cavity of the rolling bearing cage by means of a transport fixing unit and a rolling bearing cage on an inner ring (34) of the rolling bearing, the transport fixing unit being in particular the transport fixing unit according to any one of claims 1 to 3, wherein The rolling bearing cage and the rollers are pressed against the inner ring, whereby the transport securing is removed.

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