Belt Pulley Decoupler having a Belt Track, Sliding Bearing and Axial Friction Ring Injection-Molded thereon

Abstract

The present disclosure relates to a method for producing a belt pulley having a belt track, a sliding bearing injection-molded thereon, and an axial friction ring injection-molded thereon. The disclosure also relates to said belt pulley and to a belt pulley decoupler comprising said belt pulley.

Claims

1. A method of manufacturing a belt pulley, the method comprising at least one of the following non-sequential steps: a) injection molding of a belt track onto a base body of the belt pulley; b) injection molding of a sliding bearing onto the base body; c) injection molding of an axial friction ring onto the base body.

2. The method according to claim 1, wherein at least two of steps a) to c) are performed simultaneously.

3. The method according to claim 2, wherein a material comprising at least one plastic is used for the belt track in step a) or the sliding bearing in step b) or the axial friction ring in step c).

4. The method according to claim 3 wherein the base body is made of steel.

5. A belt pulley for a belt pulley decoupler, belt pulley comprising: a belt track which is injection-molded onto a base body of the belt pulley or a sliding bearing which is injection-molded onto the base body or an axial friction ring which is injection-molded onto the base body.

6. The belt pulley according to claim 5, wherein the belt track or the sliding bearing or the axial friction ring comprises a material containing at least one plastic.

7. The belt pulley according to claim 5, wherein the base body is made of steel.

8. A belt pulley decoupler comprising a belt pulley, wherein the belt pulley comprises: a belt track which is injection-molded onto a base body of the belt pulley; a sliding bearing which is injection-molded onto the base body; and an axial friction ring which is injection-molded onto the base body.

9. The belt pulley decoupler according to claim 8, wherein the belt track, the sliding bearing, and the axial friction ring comprise a material containing at least one plastic.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present disclosure is explained in more detail below by means of exemplary embodiments illustrated in the drawings. The exemplary embodiments serve only for a better understanding of the present disclosure and are in no way to be interpreted to be limiting.

[0022] FIG. 1 shows a schematic flow diagram of a method according to the disclosure.

[0023] FIG. 2 shows a sectional view of a belt pulley according to the disclosure.

[0024] FIG. 3 shows an isometric view of a belt pulley decoupler according to the disclosure.

DETAILED DESCRIPTION

[0025] In FIG. 1 a method 1 for manufacturing a belt pulley is shown schematically. In step a) a belt track is injection-molded onto a track surface of a base body of the belt pulley. In step b) a sliding bearing is injection molded onto a bearing surface of the base body, and in step c) an axial friction ring is injection molded onto an annular surface of the base body. At least two of steps a) to c) can also be performed simultaneously. In steps a) to c) a material containing at least one plastic can be used for the belt track, the sliding bearing and/or the axial friction ring. The base body of the belt pulley can be made of steel, preferably of soft steel suitable for cold forming, more preferably of deep-drawing steel and particularly preferably of DD12 steel or DD13 steel.

[0026] In FIG. 2 a belt pulley 10 is shown in section. The belt pulley 10 comprises a base body 11 with a track surface 12, a bearing surface 15 and an annular surface 18. The track surface 12 is an essentially radially outwardly facing circumferential surface area of a cylinder on an outer circumference of the base body 11. The bearing surface 15 is an essentially radially inwardly facing circumferential surface of a cylinder on an inner recess 16 of the base body 11. The annular surface 18 is an annular disk surface essentially pointing in the axial direction around the inner recess 16.

[0027] A belt track 13 is injection-molded onto the track surface 12 of the base body 11 (cf. step a) of the method according to FIG. 1). The belt track 13 can consist of a material containing at least one plastic. The injection-molded belt track 13 has a surface structure 14 that provides friction between the belt track 13 and a belt of an auxiliary drive unit. The friction is sufficient to transfer a torque applied to a belt pulley decoupler (see FIG. 3) between the belt pulley 10 and the belt. A sliding bearing 17 is injection-molded onto the bearing surface 15 (cf. step b) of the method according to FIG. 1). The sliding bearing 17 injection-molded thereon enables sliding between the belt pulley 10 and a second mass (see FIG. 3) of the belt pulley decoupler. An axial friction ring 19 is injection-molded onto the annular surface 18 (cf. step c) of the method according to FIG. 1).

[0028] In FIG. 3, a belt pulley decoupler 20 is shown isometrically. The belt pulley decoupler comprises a belt pulley 10 according to FIG. 2 and a second mass 21. The second mass 21 and the belt pulley 10 can slide against each other due to the sliding bearing 17 and the axial friction ring 19.

LIST OF REFERENCE NUMBERS

[0029] 1 Method of manufacturing a belt pulley

[0030] 10 Belt pulley

[0031] 11 Base body

[0032] 12 Track surface

[0033] 13 Belt track

[0034] 14 Surface structure

[0035] 15 Bearing surface

[0036] 16 Inner recess

[0037] 17 Sliding bearing

[0038] 18 Annular surface

[0039] 19 Axial friction ring

[0040] 20 Belt pulley decoupler

[0041] 21 Second mass