阅读说明：本技术 用于皮带盘解耦器的毂的无切削制造 (Chipless manufacturing of hub for pulley decoupler ) 是由 B·泽韦林 D·西贝尔 于 2020-09-27 设计创作，主要内容包括：根据本发明构造的、即具有通过挤压或者滚压构造的结构(11、13)的毂(2)能够比通过锻造和切削制造的毂(2)显著更简单且更成本有利地制造。该毂(2)使用在根据本发明的皮带盘解耦器(1)中。(The hub (2) constructed according to the invention, i.e. having a structure (11, 13) constructed by extrusion or rolling, can be produced considerably more simply and more cost-effectively than a hub (2) produced by forging and cutting. The hub (2) is used in a pulley decoupler (1) according to the invention.)

1. A method for manufacturing a hub (2) for a pulley decoupler (1), the method comprising the steps of:

a) punching a hub blank from a sheet material;

b) deep drawing a can from the hub blank; and

c) -introducing a structure (11, 13) into the tank by means of rolling for making the hub (2).

2. Method according to claim 1, wherein in step c) a structure (11) is produced which extends radially outwards.

3. Method according to claim 2, wherein in step c) a connecting flange (9) is introduced into the tank.

4. Method according to claim 1, wherein in step c) an axially extending structure (13) is produced.

5. Method according to any of the preceding claims, wherein the pressing of the sheet material of the tank in step c) is performed by means of at least one press roll.

6. The method according to any one of claims 1 to 4, wherein the roll-forming in step c) comprises rolling.

7. A hub (2) for a pulley decoupler (1), the hub being manufactured according to the method of any preceding claim.

8. A pulley decoupler (1) comprising a hub (2) according to claim 7.

9. A motor vehicle (100) comprising at least one pulley decoupler (1) according to claim 8.

Technical Field

The invention relates to the production of a hub for a belt pulley decoupler, wherein the cutting is used to a significantly smaller extent when producing the structure. Alternatively, extrusion or rolling is used in particular for the construction of the structure.

Background

A method for manufacturing a hub of a belt pulley decoupler is known, wherein the hub is manufactured by forging and subsequently the structure, for example the connecting flange, is manufactured by cutting. This is labor intensive and costly.

Disclosure of Invention

Starting from this, the invention is based on the object of at least partially overcoming the problems known from the prior art and in particular of specifying a hub of a belt pulley decoupler that can be manufactured without machining.

This task is solved by the features of the present invention. Further advantageous embodiments of the invention are described in the description. The features listed individually in the description can be combined with one another in a technically meaningful manner and can define further aspects of the invention. Furthermore, the features of the invention are set forth and described in detail in the specification, wherein other preferred configurations of the invention are shown.

The method according to the invention for manufacturing a hub for a pulley decoupler comprises the following steps:

a) punching a hub blank from a sheet material;

b) deep drawing a can from the hub blank; and

c) introducing a structure into the can by rolling for making the hub.

If desired, steps a and b) can be carried out in a combined process. The term "rolling" is understood to mean an extrusion process or a rolling process in which at least one roller acts on a partial region of the can in order to thereby extrude radial structures outwards from an axially extending partial region of the can or to extrude axial structures from a radially extending partial region.

The belt pulley decoupler causes damping of the rotational imbalance when transmitting forces from an input part, which is connected via a hub to a shaft, for example an output shaft of an internal combustion engine, to an output part, which transmits the forces via a traction means, in particular via a belt. For this purpose, a spring device is formed between the input part and the output part.

The labor-intensive and costly forging and cutting steps can be avoided by the method according to the invention.

Preferably, in step c) a structure is produced which extends radially outwards. In particular, it is preferred here that the structure is produced from an axially extending partial region of the tank. In particular, the connecting flange is introduced into the tank in step c).

The connecting flange is used in particular for connecting the hub with other elements of the input part. The connecting flange is preferably used for the abutment of an axial friction ring, which is preferably designed as a separate component or as part of a corresponding plastic plain bearing.

Alternatively, it is preferred that an axially extending structure is produced in step c). It is particularly preferred to introduce the structure from a radially extending partial region of the tank. The axially extending structure is preferably as follows: a tool, for example a counter-holding tool, can engage into the structure when the hub or the belt pulley decoupler is assembled on the shaft.

Preferably, the pressing of the sheet material of the can in step c) is performed by means of at least one press roll. Here, the can is loaded rotationally for deformation with at least one pressure roller. This is understood in particular to mean stretch-extrusion-forming. The preferred configuration is: the mandrel inserted into the interior of the can acts as a counter holder to prevent deformation of the sheet material of the can into the interior. In principle, a structure is produced here, wherein the structure is produced by an upsetting of the sheet metal.

Alternatively, a method is preferably used in which the rolling in step c) comprises rolling.

The term "rolling" is understood to mean pressure forming using a press roll which causes a partial region of the can to be formed into a structure. Here, a single-stage rolling process or a multi-stage rolling process can be performed.

Furthermore, a hub for a belt pulley decoupler is proposed, which hub has been manufactured according to the method according to the invention. Furthermore, a pulley decoupler comprising a corresponding hub and a motor vehicle comprising at least one corresponding pulley decoupler are proposed.

Preventive attention should be paid to: the terms "first", "second" … … are used herein primarily (solely) to distinguish one from another of a plurality of objects, parameters, or processes of the same type, i.e., to specify a particular relationship and/or order of such objects, parameters, or processes. If dependency and/or order is required, this is explicitly stated herein or will be apparent to the skilled person when studying the specifically stated configurations.

Drawings

The invention and the technical environment are explained in detail below with reference to the drawings. It should be noted that the present invention should not be limited by the illustrated embodiments. Unless explicitly stated otherwise, it is also possible in particular to extract part aspects from the facts set forth in the drawings and to combine them with other constituents and knowledge in the present description and/or in the drawings. It should be noted in particular that the drawings and the scaling shown in particular are purely schematic. The same reference numerals denote the same objects, so that explanations from other figures can be used supplementarily if necessary. The figures show:

FIG. 1: a pulley decoupler of a first example having a hub;

FIGS. 2 and 3: a first example of a hub is shown in two views;

FIGS. 4 and 5: a second example of a hub is shown in two views;

FIG. 6: a pulley decoupler of a second example having a hub;

FIG. 7: a first example of a canister;

FIG. 8: an example of a can deformed into a hub; and

FIG. 9: a motor vehicle having a pulley decoupler.

Detailed Description

Fig. 1 shows a pulley decoupler 1 with a first example of a hub 2. Via the hub 2, the belt pulley decoupler 1 can be connected or connected to a shaft, not shown, of, for example, a generator, for example, an alternator (Lichtmaschine) or a starter generator (i.e. a unit which combines the functions of an alternator and a starter). The pulley decoupler 1 has an output part 3 which serves as a housing for a spring device 4 having a plurality of arcuate springs 5. The pulley decoupler 1 also has an input part 6 which comprises a spring flange 7 against which the arcuate spring 5 bears. The spring device 4 here causes a limited rotatability between the output part 3 and the input part 6 about the common axis of rotation. Thereby, a rotational imbalance between the input member 6 and the output member 3 can be damped. The input member 5 further comprises a hub 2. The pulley decoupler 1 has a pulley contour 8 on the radially outer side, which serves as a running means for a not shown traction means (belt) with a corresponding contour.

The hub 2 has a thrust flange 9. The thrust flange serves as an axial abutment for the axial friction ring 10. Alternatively, the thrust flange 9 can also be used as an abutment for a one-piece plastic bearing with a corresponding axial friction ring.

Fig. 1 also shows the definition of the axial direction 15 and the radial direction 16, both with reference to the axis of rotation 17 about which the hub 2 and thus the input part 5 of the pulley decoupler 1 rotate.

Fig. 2 shows a cross section of the hub 2. Furthermore, a pressure roller is shown, which is used to introduce the thrust flange 9 as a structure 11 during the pressing process. For details of the method, reference is made in particular to fig. 7 and 8 below. Fig. 2 shows that the structure 11 is produced by a kind of upsetting of the sheet 12 of the hub 2.

Fig. 3 shows a perspective view of the hub 2 with the thrust flange 9 as a structure 11. Furthermore, a structure 13, in particular a recess, is formed in the rim 14, into which a tool can engage, for example, when the belt pulley decoupler 1 and/or the hub 2 is assembled. Such a structure 13 or the rim 14 with the structure 13 can also be formed by pressing or rolling. After the structures 11, 13 have been produced by pressing or rolling, the reworking by cutting can be engaged, but not for forming the respective structure 11, 13 itself, but only for reworking in order to maintain predeterminable tolerances. It is also possible that only the structure 11 is constructed by pressing or rolling, while the structure 13 is introduced into the rim 14 by cutting. In particular, in the production of the thrust flange 9, a machining operation is advantageously carried out in order to be able to provide a defined abutment for the axial friction ring 10 and, if appropriate, for the plain bearing.

Fig. 4 and 5 show a second example of a hub 2 in two views, which, unlike the first example, is produced not by extrusion but by rolling. In this case, in contrast to the first example, the connecting flange 9, which is designed as a structure 11, is made of a solid material. Fig. 5 shows a perspective view of the hub 2. The hub also has corresponding recesses in the rim 14 as formations 13. Fig. 6 shows a pulley decoupler 1 with a second example of a hub 2 which is identical to the pulley decoupler 1 with a hub according to the first example in fig. 1, except for the configuration of the hub 2. To avoid redundancy, refer to the description of fig. 1.

Fig. 7 schematically shows a cross section of a can 18 which has been constructed by punching a blank out of a sheet material 19 and deep drawing. Then, in order to manufacture the structure 11 according to the first example (see fig. 1 to 3), the can 18 is processed by pressing with the pressing roller 20 and the counterpart holder 21.

Fig. 9 schematically shows a motor vehicle 100 with a drive engine 101, preferably at least one internal combustion engine, which has a belt pulley decoupler 1 on a shaft 102 of the drive engine 101. The traction means 103 (belt) is correspondingly connected to the pulley decoupler 1 and serves to transmit torque to a belt drive (not shown).

The hub 2 constructed according to the invention, i.e. having the structures 11, 13 constructed by extrusion or rolling, can be produced considerably simpler and more cost-effectively than a hub 2 produced by forging and cutting. The hub 2 is used in a pulley decoupler 1 according to the invention.

List of reference numerals

1 Belt pulley decoupler

2 hub

3 output part

4 spring device

5 arc spring

6 input component

7 spring flange

8 Belt pulley Profile

9 thrust flange

10 axial friction ring

11 structure

12 sheet material

13 structure

14 wheel rim

15 axial direction

16 radial direction

17 axis of rotation

18 jar

19 sheet material

20 pressure roller

21 paired holder

100 motor vehicle

101 driving engine

102 axle

103 traction belt