BELT PULLEY DECOUPLER HAVING A TOOTHING, AUXILIARY ASSEMBLY DRIVE AND DRIVE MOTOR HAVING A CORRESPONDING BELT PULLEY DECOUPLER, AND A METHOD FOR PRODUCING A CORRESPONDING BELT PULLEY DECOUPLER

Abstract

A belt pulley decoupler (1) for an auxiliary assembly drive (2) includes an input part (3) comprising a hub (4); and an output part (5) comprising a belt pulley (6). The output part (5) and the input part (3) can rotate about a common axis of rotation (7). The belt pulley decoupler further includes a first flange (8) having a first toothing (30), with the first flange (8) being connected to the hub (4) by means of a toothing (9); and a second flange (31) having a second toothing (32), with the second toothing (32) being connected to a third toothing (33) formed by the toothing (9) on the hub (4).

Claims

1. A belt pulley decoupler for an auxiliary assembly drive, having at least: an input part comprising a hub; an output part comprising a belt pulley, the output part and the input part being rotatable about a common axis of rotation; a first flange having a first toothing, the first flange being connected to the hub by a toothing; and a second flange having a second toothing, the second toothing being connected to a third toothing formed by the toothing on the hub.

2. The belt pulley decoupler according to claim 1, further comprising a spring device by which the output part and the input part are rotatable to a limited extent relative to one another about the common axis of rotation.

3. The belt pulley decoupler according to claim 1, wherein the first flange connects the hub to the belt pulley.

4. The belt pulley decoupler according to claim 1, wherein the second flange connects the hub to a rotational vibration damper.

5. The belt pulley decoupler according to claim 1, wherein the toothing is formed on an inner circumference of the first flange.

6. The belt pulley decoupler according to claim 1, wherein the toothing has a first diameter which is smaller than a second diameter of a collar of the hub.

7. The belt pulley decoupler according to claim 1, wherein the first flange has a greater hardness than the hub.

8. An auxiliary assembly drive comprising: the belt pulley decoupler according to claim 1; and a traction means at least partially wrapping around the belt pulley decoupler.

9. An assembly comprising: the belt pulley decoupler according to claim 1; and a drive motor for a motor vehicle including a shaft coupled to the belt pulley decoupler.

10. A method for producing a belt pulley decoupler for an auxiliary assembly drive comprising: providing a hub, a first flange with a first toothing, and a second flange with a second toothing; pressing the first flange onto the hub so that a third toothing is formed on the hub by the first toothing; and fastening the second flange to the third toothing of the hub.

11. The method as recited in claim 10 wherein the fastening of the second flange to the third toothing of the hub includes pressing the second flange onto the hub so the second toothing engages the third toothing.

12. The method as recited in claim 10 wherein pressing the first flange onto the hub so that the third toothing is formed on the hub by the first toothing includes cutting the third toothing radially into a collar of the hub.

13. A belt pulley decoupler for an auxiliary assembly drive comprising: an input part comprising a hub; an output part comprising a belt pulley, the output part and the input part being rotatable about a common axis of rotation; a first flange having a first toothing, the first flange being connected to the hub by the first toothing engaging a third toothing on the hub, the first flange having a greater hardness than the hub; and a second flange having a second toothing, the second toothing being connected to the third toothing in a form-fitting manner.

14. The belt pulley decoupler as recited in claim 13 further comprising energy stores, the energy stores being supported by the first flange and the belt pulley or a cover of the belt pulley so that the input part and the output part are rotatable to a limited extent relative to one another against a spring force of the energy stores.

15. The belt pulley decoupler as recited in claim 14 further comprising a sliding bearing radially between the hub and the belt pulley rotatably supporting the belt pulley on the hub.

16. The belt pulley decoupler as recited in claim 13 further comprising a cover non-rotatably held in the belt pulley.

17. The belt pulley decoupler as recited in claim 13 wherein teeth of the first toothing are identical to teeth of the second toothing.

18. The belt pulley decoupler as recited in claim 13 wherein the hub includes an annular chip chamber receiving chips formed during a pressing of the first flange onto the hub.

19. The belt pulley decoupler as recited in claim 13 wherein the first flange has a greater hardness than the second flange.

Description

BRIEF SUMMARY OF THE DRAWINGS

[0033] Both the present disclosure and the technical field are explained in more detail below with reference to the figures. It should be noted that the figures show a particularly preferred variant of the present disclosure, but is not limited thereto. Like components are provided with the same reference numerals in the figures. wherein, in an exemplary and schematic manner:

[0034] FIG. 1: shows a drive motor having a belt pulley decoupler in a side view;

[0035] FIG. 2: shows a belt pulley decoupler in longitudinal section;

[0036] FIG. 3: shows a first flange of the belt pulley decoupler in a front view;

[0037] FIG. 4: shows the first flange after caulking with a hub of the belt pulley decoupler; and

[0038] FIG. 5: shows a detailed view of the flange after caulking with the hub of the pulley decoupler.

DETAILED DESCRIPTION

[0039] FIG. 1 shows a drive motor 17 having an auxiliary assembly drive 2 in a side view. The auxiliary assembly drive 2 comprises a belt pulley decoupler 1, which is connected to a shaft 18 of the drive motor 17. Here, the shaft 18 is a crankshaft of the drive motor 17. The belt pulley decoupler 1 can be rotated about an axis of rotation 7 by means of the shaft 18. On a side of the drive motor 17 opposite the belt pulley decoupler 1, the shaft 18 is coupled to a transmission 23. An auxiliary assembly 24 can be driven by the belt pulley decoupler 1 via a traction means 16. The auxiliary assembly 24 is a (current) generator, for example in the style of an alternator.

[0040] FIG. 2 shows the belt pulley decoupler 1 in a longitudinal section. The belt pulley decoupler 1 has an input part 3 having a hub 4 and a first flange 8. The first flange 8 is annular and has a first toothing 30 radially on the inside. Furthermore, the first flange 8 is pressed onto an outer collar 14 of the hub 4, so that a toothing 9 or caulking toothing is formed between the hub 4 and the first flange 8. The toothing 9 or caulking toothing is formed on an inner circumference 11 of the first flange 8. The belt pulley decoupler 1 also comprises a second flange 31 of a rotational vibration damper 34. The second flange 31 has a second toothing 32 radially on the inside. When the first flange 8 is pressed onto the collar 14, the first toothing 30 of the first flange 8 has a third toothing 33 cut radially outward into the collar 14 of the hub 4. As a result, the second flange 31 can then be fastened to the third toothing 33 of the hub 4 by means of its second toothing 32. The second toothing 32 of the second flange 31 engages positively in the third toothing 33 of the hub 4, so that the second flange 31 is connected to the hub 4 for conjoint rotation. The hub 4 and the first flange 8 are likewise designed to be connected in a torsion-proof manner to one another, wherein the hub 4 can be connected to the shaft 18 of the drive motor 17 shown in FIG. 1, by means of which the hub 4, the first flange 8, and the second flange 31 can be rotated about the common axis of rotation 7. The belt pulley decoupler 1 also has an output part 5 having a belt pulley 6. A traction means running surface 26 for the traction means 16 of the auxiliary assembly drive 2 shown in FIG. 1 is formed on an outer surface 25 of the belt pulley 6. Between the input part 2 and the output part 4, a spring device 10 is provided with a plurality of energy stores 27 distributed in a circumferential direction, wherein the energy stores 27 here are designed in the form of arc springs. The energy stores 27 are supported on the one hand on the flange 8 and on the other hand on the belt pulley 6 or a cover 28 of the belt pulley 6, so that the input part 3 and the output part 5 can rotate to a limited extent relative to one another against a spring force of the energy stores 27. The cover 28 is pressed into the belt pulley 6 in a torsion-proof manner relative to the belt pulley 6. The belt pulley 6 can be rotated to a limited extent about the axis of rotation 7 relative to the hub 4. For this purpose, a sliding bearing 29 is arranged on a circumferential surface 21 of the hub 4. The sliding bearing 29 supports the belt pulley 6 in an axial direction 19 (parallel to the axis of rotation 7) and in a radial direction 20 (orthogonal to the axial direction 19) with respect to the hub 4.

[0041] FIG. 3 shows the first flange 8 in a partial section and in a front view. In particular, teeth 22 of the first toothing 30 of the first flange 8 can be seen here on the inner circumference 11 of the first flange 8 before caulking with the hub 4 shown in FIG. 2. The teeth of the second toothing 32, shown in FIG. 2, of the second flange 31 can be designed identically to the teeth 22 of the first toothing 30.

[0042] FIG. 4 shows the first flange 8 after caulking with the hub 4 (and before fastening of the second flange 31 shown in FIG. 2). The toothing 9 or caulking toothing was cut into the hub 4 by the toothing 30 shown in FIG. 3 during the caulking or pressing of the flange 8 with the hub 4. The chips produced in the process can be received by an annular chip chamber 15 shown in FIG. 2.

[0043] FIG. 5 shows a detailed view of the region of the first flange 8 marked in FIG. 4 after caulking or pressing with the hub 4. The toothing 9 or caulking toothing has a first diameter 12 that is smaller than a second diameter 13 of the collar 14 of the hub 4.

[0044] As a result of the present disclosure, a belt pulley decoupler 1 can be operated in a particularly reliable manner and can be produced more cost-effectively.

LIST OF REFERENCE SYMBOLS

[0045] 1 Belt pulley decoupler [0046] 2 Auxiliary assembly drive [0047] 3 Input part [0048] 4 Hub [0049] 5 Output part [0050] 6 Belt pulley [0051] 7 Axis of rotation [0052] 8 First flange [0053] 9 Toothing [0054] 10 Spring device [0055] 11 Inner circumference [0056] 12 First diameter [0057] 13 Second diameter [0058] 14 Collar [0059] 15 Chip chamber [0060] 16 Traction means [0061] 17 Drive motor [0062] 18 Shaft [0063] 19 Axial direction [0064] 20 Radial direction [0065] 21 Circumferential surface [0066] 22 Teeth [0067] 23 Transmission [0068] 24 Auxiliary assembly [0069] 25 Outer surface [0070] 26 Traction means running surface [0071] 27 Energy store [0072] 28 Cover [0073] 29 Sliding bearing [0074] 30 First toothing [0075] 31 Second flange [0076] 32 Second toothing [0077] 33 Third toothing [0078] 34 Rotational vibration damper