ROLLER FREEWHEEL HAVING AN AXIS OF ROTATION FOR TORQUE TRANSMISSION DEPENDING ON THE DIRECTION OF ROTATION, A METHOD FOR MANUFACTURING A ROLLER FREEWHEEL, AND A MANUFACTURING FACILITY FOR SUCH A MANUFACTURING METHOD

Abstract

A roller freewheel (1) has at least the following components: a rolling element cage (3); a plurality of rolling elements (4), the rolling elements (4) being accommodated in the rolling element cage (3); a ramp ring (5) having a ramp contour (6) for blocking the rolling elements (4) with the ramp contour (6) in a first direction of rotation (7) and for allowing rotation of the rolling elements (4) relative to the ramp ring (5) in the opposite, second direction of rotation (8). The ramp contour (6) of the ramp ring (5) is designed to accommodate a plurality of rolling element rows (9, 10, 11), and the rolling element cage (3) comprises a plurality of separate partial cages (12, 13, 14), each partial cage (12, 13, 14) comprising at least one rolling element row (9, 10, 11).

Claims

1. A roller freewheel having an axis of rotation for a torque transmission depending on the direction of rotation, comprising: a roll body cage; a plurality of roll bodies, the roll bodies being housed in the roll body cage; and a ramp ring having a ramp contour for blocking the roll bodies with the ramp contour in a first direction of rotation and for allowing rotation of the roll bodies relative to the ramp ring in an opposite, second direction of rotation, wherein the ramp contour of the ramp ring is designed to house a plurality of roll body rows; and the roll body cage comprises a plurality of separate partial cages, each partial cage comprising at least one roll body row.

2. The roller freewheel according to claim 1, wherein the partial cages of the plurality of partial cages are formed identically.

3. The roller freewheel according to claim 1, wherein the partial cages each comprise exactly one roll body row.

4. The roller freewheel according to claim 1, wherein the ramp contour has an axial length that corresponds to the sum of the axial widths of insertable partial cages, and wherein the ramp ring has a raw length in production, which can be shortened individually to a specific length.

5. The roller freewheel according to claim 1, wherein the ramp ring has an axial end stop on one side and has an open side opposite thereto, wherein the roll body rows can be pushed axially into the open side.

6. A manufacturing method for a roller freewheel, comprising at least the following steps: a. Producing a ramp ring having a ramp contour with a predetermined raw length; b. Determining a torque to be transmitted in the first direction of rotation; c. Determining a corresponding number of roll body rows in a roll body cage with a certain width; d. Adapting the raw length of the ramp contour to the width of the number of roll body rows determined in step c., wherein the raw length adapted in this way corresponds to the length of the ramp contour in the final state; and e. Introducing the determined number of roll body rows into the adapted ramp ring.

7. The manufacturing method according to claim 6, wherein the ramp ring has an axial end stop on one side and has an open side opposite thereto; and wherein the determined number of roll body rows are pushed axially into the open side of the ramp ring.

8. (canceled)

9. The manufacturing method according to claim 6, wherein the ramp ring is produced by deep drawing.

10. A roller freewheel, comprising: a plurality of separate partial cages, each partial cage having at least one roll body row, the partial cages mounted to one another such that they can be loosely rotated relative to one another; a plurality of roll bodies, the roll bodies being housed in the partial roll body cages; and a ramp ring having a ramp contour for blocking the roll bodies with the ramp contour in a first direction of rotation and for allowing rotation of the roll bodies relative to the ramp ring in an opposite, second direction of rotation.

11. The roller freewheel according to claim 10, wherein the ramp ring has an axial end stop on one side and has an open side opposite thereto, wherein the partial cages can be pushed axially into the open side.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The roller freewheel is explained in detail below based on the relevant technical background with reference to the associated drawings, which show preferred embodiments. The drawings are purely schematic and should not be regarded as dimensionally accurate and suitable for defining proportions. In the figures:

[0047] FIG. 1: shows a roller freewheel with two rolling bearing rows;

[0048] FIG. 2: shows a ramp ring with a raw length;

[0049] FIG. 3: shows a roller freewheel according to FIG. 4 in an exploded view; and

[0050] FIG. 4: shows a roller freewheel with three rolling bearing rows.

DETAILED DESCRIPTION

[0051] FIG. 1 shows a perspective view of a roller freewheel 1 in which a torque 20 (in the direction shown) can be transmitted (almost) loss-free about the axis of rotation 2 in the first direction of rotation 7 and no torque can be transmitted in the second direction of rotation 8. The first direction of rotation 7 and the second direction of rotation 8 are the relative directions of rotation based on a stationary ramp ring 5. A plurality of roll bodies 4 is provided in the ramp ring 5 for torque transmission depending on the direction of rotation. The roll bodies 4 are guided in a roll body cage 3 as a first roll body row 9 and a second roll body row 10 and are radially pretensioned against the ramp ring 5. The roll body cage 3 is subdivided here into a first partial cage 12 for the first roll body row 9 and a second partial cage 13 for the second roll body row 10. These two partial cages 12, 13 are preferably arranged in the ramp ring 5 such that they can be loosely rotated relative to one another. The ramp ring 5 is designed here with an end stop 18 and an open side 19 so that the roll bodies 4 in the roll body cage 3 can be pushed axially through the open side 19 into the ramp ring 5 up to the end stop 18. For the rotational torque transmission depending on the direction, the ramp ring 5 has a ramp contour 6, which can be clearly seen in FIGS. 2 and 3 and is therefore only referred to there. This ramp contour 6 has a length 15 that extends from the (optional) end stop 18 to the open side 19. In this embodiment, this length 15 corresponds to twice the width 16 of a partial cage 12, 13, so that the two partial cages 12, 13 are housed here exactly.

[0052] FIG. 2 shows a perspective view of a ramp ring 5 that is designed, for example, for the embodiment of the roller freewheel 1 according to FIG. 1 or FIG. 4. In the form shown, the ramp ring 5 has a raw length 17 that can be shortened to the required length 15 (see FIG. 1). The ramp contour 6 comprises a plurality of identical ramps (corresponding to the number of roll bodies 4 of a roll body row 9, 10, 11), each of which is divided into a steep ramp 21 for torque transmission (relative to the first direction of rotation 7 of the roll body rows 9, 10, 11 to the ramp ring 5) and a flat ramp 22 for (in the second direction of rotation 8 of the roll body rows 9, 10, 11 relative to the ramp ring 5) rolling over against the pretensioning by the roll body cage 3.

[0053] FIG. 3 shows a roller freewheel 1, as shown in FIG. 4, in an exploded view, which the assembly step of the axial insertion (shown to the left) of the individual partial cages 12, 13 and 14 through the open side 19 to the end stop 18 reproduces. The length 15 corresponds here to the raw length 17 of the ramp ring 5 according to the representation in FIG. 2, so it has not been shortened. The length 15 of the ramp ring 5 according to FIG. 1, however, is shortened compared to the raw length 17 according to FIG. 2 (for two partial cages 12, 13). The length 15 here in FIG. 3 corresponds to three times the width 16 of the (identical) partial cages 12, 13 and 14, which are preferably also identical to the partial cages 12 and 13 in FIG. 1.

[0054] FIG. 4 shows the roller freewheel 1 according to FIG. 3 in the final state with three partial cages 12, 13 and 14 that guide the three rolling bearing rows 9, 10 and 11 and radially pretension their roll bodies 4 against the ramp contour 6 (see FIG. 3).

[0055] A cost-effective and flexible construction system for a variable transmittable torque is provided with the roller freewheel, the manufacturing method and the manufacturing facility proposed herein.

LIST OF REFERENCE SYMBOLS

[0056] 1 Roller freewheel [0057] 2 Axis of rotation [0058] 3 Roll body cage [0059] 4 Roll body [0060] 5 Ramp ring [0061] 6 Ramp contour [0062] 7 First direction of rotation [0063] 8 Second direction of rotation [0064] 9 First roll body row [0065] 10 Second roll body row [0066] 11 Third roll body row [0067] 12 First partial cage [0068] 13 Second partial cage [0069] 14 Third partial cage [0070] 15 Length of the ramp contour [0071] 16 Width of a partial cage [0072] 17 Raw length [0073] 18 End stop [0074] 19 Open side [0075] 20 Torque [0076] 21 Steep ramp [0077] 22 Flat ramp