WO2011023156A1

WO2011023156A1 - Arrangement of components of a belt-driven conical pulley transmission

Info

Publication number: WO2011023156A1
Application number: PCT/DE2010/000895
Authority: WO
Inventors: Bernhard Walter
Original assignee: Schaeffler Technologies Gmbh & Co. Kg
Priority date: 2009-08-24
Filing date: 2010-07-29
Publication date: 2011-03-03
Also published as: DE102010032660A1; DE112010003380A5

Abstract

The invention relates to an arrangement of components of a belt-driven conical pulley transmission having a variably adjustable transmission ratio (CVT), comprising a conical pulley and at least one further component, at least the conical pulley being a stamped part or a part shaped by stamping and being joinable or joined to the at least one further component. In order to devise an improved belt-driven conical pulley transmission, the at least one further component and the pulley can or are joined by friction welding.

Description

Arrangement of components of a Keschlelscheibenumschlinqunqsqetriebes

The invention relates to an arrangement of components of a Kegelscheibenumschlingungsge- gearbox with a variably adjustable transmission ratio (CVT), with a conical disk and at least one further component, wherein at least the conical disk is a stamped part or punching formed part and is joined or joined with the at least one further component.

Arrangements of components of a conical-pulley transmission are known. Keelsscheibenumschlingungsgetriebe can for example be used in conjunction with an internal combustion engine of a motor vehicle and have a variably adjustable by means of cone pulley pairs gear ratio, wherein two of the conical disk pairs are wrapped by a belt, for example a link chain, for transmitting a torque. DE 199 09 347 A1 relates to a transmission with at least one cone pulley pair for a continuously variable transmission, wherein at least one pulley part is formed from interconnected sheet-metal shaped parts. JP 2004 316 859 A relates to a conical-pulley transmission in which cavities can be produced by means of joining individual parts on a rear side of a conical disk. JP 2005 074 503 A relates to a method for producing a movable flange of a bevel belt transmission. In particular, a sliding part is friction-welded to a base body of a conical disk. JP 611 053 68 A relates to a production method of a deflection roller for a belt-drive stepless transmission. In this case, a cone pulley part and an axis are butt joined by friction welding.

The object of the invention is to allow a high-quality, easy-to-build, inexpensive producible conical-pulley transmission.

The object is in an arrangement of components of a conical-pulley belt drive having a variably adjustable transmission ratio (CVT), with a conical disk and at least one further component, wherein at least the conical disk is a stamped part or stamped formed part and joined or joined to the at least one further component, is achieved in that the at least one further component and the conical disk are joined or joined by means of friction welding. Advantageously, the conical disk which can be produced as a cost-effective stamped part or stamped formed part and which is at least one further Component be inexpensively and high quality joined. Advantageously occur during friction welding comparatively low temperatures, resulting in consequence to a high-quality, in particular distortion and / or Schweißkraterfreien joint between the conical disk and the at least one further component.

In one embodiment of the arrangement it is provided that the further component is a cooperating with a shaft of the conical-pulley belt drive support member. Advantageously, the stability of the conical disk can be increased by means of the support member, which in particular can have a stability comparable to a forged part, wherein advantageously a weight saving and / or saving of production costs is possible.

In a further embodiment of the arrangement it is provided that the arrangement is longitudinally displaceable in the longitudinal direction of the shaft. Advantageously, the arrangement for setting a transmission ratio in the longitudinal direction of the shaft can be moved.

In a further embodiment of the arrangement it is provided that the support member has a Anformung, by means of which the support member rotatably and longitudinally displaceable to the shaft can be assigned. Advantageously, the torque between the shaft and the conical disk can be transmitted via the Anformung, which is independent of this for adjusting the transmission ratio longitudinally displaceable. Advantageously, the molding can be produced in the production process of the support member in a simple manner by means of molding.

In a further embodiment of the arrangement it is provided that the Anformung is a Mitnahehlängszahnung which meshes with the shaft rotatably associated counter-toothing. Advantageously, the torque can be transmitted via the teeth.

In a further embodiment of the arrangement, it is provided that the conical disk of the shaft of the conical-pulley belt transmission is assigned or assignable by means of friction welding. Advantageously, the cone pulley produced as a stamped part can be assigned to the shaft by friction welding in a simple manner, which is a fixed cone pulley, which is not assigned longitudinally displaceable and rotationally fixed to the shaft. The conical disk assigned by means of friction welding can form a pair of conical disks with the previously described longitudinally displaceable conical disk for guiding the wraparound member of the conical disk belting transmission. In a further embodiment of the arrangement it is provided that the conical disk has an integrally formed collar, which is assigned to the shaft by means of friction welding or can be assigned. Advantageously, the collar can be formed in a simple manner, for example by means of forming, in particular in one step together with a punching operation on the conical disk.

In a further embodiment of the arrangement, it is provided that the at least one further component is a support plate. Advantageously, the stability of the conical disk can be increased by means of the support plate.

In a further embodiment of the arrangement, it is provided that the support plate has an integrally formed with the shaft coaxial shaft portion. Advantageously, the function of an extension of the shaft, for example, for the purpose of storage and / or an output can be taken over by the support plate in addition to the function of stability increase.

In a further exemplary embodiment of the arrangement, provision is made for the support plate to have breakthroughs and / or projections which cause stiffness jumps. Advantageously, the stiffness jumps can reduce structure-borne noise propagation in the assembled arrangement during operation of the conical-pulley belt transmission, in particular in conjunction with a link chain or toothed chain or so-called CVT chain of the applicant.

In a further embodiment of the arrangement, it is provided that the apertures have unbent partial cut-outs, wherein ends of the partial punch-outs are assigned or assignable by means of friction welding of the conical disk. Advantageously, a spatial structure enhancing stability of the structure, in particular in the sense of a truss structure, are created, with additional stability of the joint by means of the unbent Teilausstanzungen that can be assigned to the conical disk, can be achieved.

In a further embodiment of the arrangement, it is provided that the at least one further component and / or the conical disk can be added or joined together by means of friction welding. Advantageously, no further processing steps are available required for friction welding. Any necessary further processing can take place in the assembled state.

In a further embodiment of the arrangement, it is provided that the at least one further component and the conical disk have different materials. Advantageously, by means of friction welding different materials can be joined together in a simple manner. Thus, it is possible, for example, to provide special materials suitable for guiding the looping element only on the conical disks themselves, wherein the supporting parts can be manufactured from a suitable, in particular more cost-effective, material.

The object is also achieved in a conical-pulley transmission with a previously described arrangement. This results in the advantages described above.

The object is also in a method for producing an arrangement of

Components of a conical-pulley belt drive with a variably adjustable transmission ratio (CVT), in particular a previously described arrangement, with a conical disk and at least one other component solved. It is a punching or stamping forming the conical disk of Kegelscheibenumschlingungsgetriebes provided, the task is solved by joining the conical disk with the at least one other component by means of friction welding. This results in the advantages described above.

Further advantages, features and details of the invention will become apparent from the following description in which, with reference to the drawings, various embodiments are described in detail. The same, similar and / or functionally identical parts are provided with the same reference numerals. Show it:

1 shows a longitudinal section of a conical disk pair of a conical pulley belt transmission;

Figure 2 is a schematic longitudinal sectional view of a joined by friction welding

Arrangement of a conical disk and a support member;

3 shows a longitudinal section of a further arrangement with a conical disk and a

Backing pad and FIG. 4 shows a three-dimensional oblique view in the support plate shown in FIG.

FIG. 1 shows a first arrangement 1 and a second arrangement 3 of components of a cone pulley pair 5 of a conical pulley wrap 7 only partially shown. Between the conical pulley pair 5 is a belt wrapper (not shown), for example a tooth chain or CVT chain of the same assignee for transmission a torque feasible. The first arrangement 1 has a first conical disk 9, which is joined to a support part 11 by means of friction welding. The support member 11 increases the stability of the first arrangement 1 and serves to form a pressure chamber 13. By means of the pressure chamber 13, which can be filled via a fluid path 15 with a hydraulic medium, the first arrangement 1 in a longitudinal direction of the cone pulley pair 5, which in FIG is indicated by a double arrow 17, 7 are shifted back and forth for setting a transmission ratio of the conical-pulley belt drive. In addition, the support member 11 fulfills the function of a rotationally fixed assignment of the first arrangement 1 and thus the first conical disk 9 to a shaft 19 of the conical disk pair 5. For this purpose, the support member 11 has a Anformung, which is designed as an outer Mitnahehlängsverzahnung 21. However, the molding can also be an arbitrary, in particular polygonal, shape. The Mitnahehlängsverzahnung 21 meshes with a formed as an internal toothing counter teeth 25 of a rotationally fixed to the shaft 19 associated pressure chamber plate 23. The pressure chamber plate 23 is rotationally fixed and fluid-tight, for example by means of a welding, the shaft 19 assigned. The pressure chamber plate 23 and the support member 11 are sealed fluid-tight against each other by means of a seal, for example by means of an O-ring.

Advantageously, the first conical disk 9 can be produced as a stamped part or stamped formed part and can be assigned to the support part 11 in a rotationally fixed and fluid-tight manner by means of friction welding.

The second arrangement 3 has a second conical disk 27, which can advantageously also be produced as a stamped part or stamped formed part. The second conical disk 27 has an integrally formed collar 29, which is joined to the shaft 19 by friction welding. Advantageously, the collar 29 forms the fluid path 15 in an inner side.

The second arrangement 3 has, in addition to the second conical disk 27, a support plate 31 which can likewise be produced as a stamped formed part. The support plate 31 has an integrally formed white Lenteil 33 or a covenant coaxially extends the shaft 19 and the inside forms the fluid path 15. The support plate 31 is frictionally friction welded on a plate inside in the region of a circumference of the support plate 31 with a rear side of the second conical disk 27 cohesively and fluid-tight.

The support plate 31 has a plurality of openings 35, which are designed as bent-over partial punched-outs. The protrusions 37 of the apertures 35, which are formed by bending over, are also butt-welded to the rear side of the second conical disk 27 by means of friction welding. Advantageously, by means of the support plate 31 and the welded projections 37, a three-dimensional, in particular truss-like, support structure advantageously increases the stability of the second arrangement 3. In addition, the openings 35 form desired stiffness jumps in the second arrangement 3, in particular in the support plate 31, which advantageously contributes to noise optimization during operation of the conical-pulley transmission 7, advantageously in particular together with the CVT chain of the same Applicant.

Figure 2 shows a schematic view of another first arrangement 1, analogous to the first arrangement 1 of Figure 1. Shown are the first conical disk 9 and the support member 11, which are joined flat by means of friction welding radially within a circumference. To illustrate that the first conical disk 9 and the second support member 11 can be produced as sheet metal stampings, a sheet metal stamping contour 39 of both components is shown in dashed lines in Figure 2.

FIG. 3 shows a further second arrangement 3 with a support plate 31 and a second conical disk 27. It can be seen that a rear side of the second conical disk 27 is friction-welded to one another with a rear side of the support plate 31 virtually over the entire surface. As a difference from the illustration according to FIG. 1, the support plate 31 has a multiplicity of closed projections 41 which realize the desired stiffness jumps as well as the framework structure for increasing the stability.

FIG. 4 shows a three-dimensional oblique view of an inside of the support plate 31 shown in FIG. 3. It can be seen that the projections 41 extend into the inside of the support plate 31, with a total of six of the projections 41 being provided. On the back of the support plate 31, which is not visible in FIG. speaking cavities, as shown in Figure 3, are not friction welded to the back of the second conical disk 27.

The conical disks 9 and 27 are advantageously made of sheet metal and are the entire surface by friction welding with at least one other component, in particular the support member 11, the shaft 19 and / or the support plate 31 is connected. Advantageously be avoided by the full-surface welding gaping a corresponding joint and thus an unacceptable voltage increase. Advantageously, this is also a very stiff framework construction with broken even at a circumference joints cost effectively. It is also advantageous to realize structures with a different flexibility on the support plate 31, which can be advantageously used to generate, together with the belt, a special random pattern for optimizing the acoustics of the cone pulley belt transmission 7.

Advantageously, blanks of the cone pulley pair 5 can be made of at least two sheet metal parts which are available over the entire surface by means of friction welding. Advantageously, different materials, for example carbon steels and / or multilayer steels for the use of a special hardening process, can be used for the different components of the cone pulley pair 5 of the conical pulley belt transmission 7.

In comparison to known conical disks, which can be manufactured, for example, as forgings, the cone pulley pair 5 can be realized inexpensively and yet highly stable means of sheet metal stampings. Advantageously results from the surface friction welding as tension-free joint as possible ensures a high stability, which is comparable to the stability of forgings. Advantageously, the components of the cone pulley pair 5 can be connected to each other over the entire surface by means of friction welding. The full-surface welding prevents gaping at the joint, whereby an unacceptable voltage increase can be advantageously avoided. Advantageously, a framework construction can be realized, which allows a very high rigidity. In addition, structures with different flexibility can advantageously also be produced on the support plate 31, which is assigned to the second conical disk 27, which can optimize the acoustics of the conical-disk belt transmission 7 by means of a random pattern. LIST OF REFERENCE NUMBERS

arrangement

Conical pulley

cone pulley

conical disk

supporting part

pressure chamber

fluid path

double arrow

wave

Take spline

Pressure chamber plate

counter teeth

conical disk

Federation

backing pad

shaft part

breakthroughs

projections

Sheet metal stamping contour

projections

Claims

claims

1. assembly (1; 3) of components of a conical-pulley belt transmission (7) with a variably adjustable transmission ratio (CVT), with a conical disk (9; 27) and at least one further component, wherein at least the conical disk (9; 27) comprises a stamped part or Stamped forming part is and is joined or joined to the at least one further component, characterized in that the at least one further component and the conical disk (9; 27) are joined or joined by means of friction welding.

2. Arrangement according to claim 1, characterized in that the further component with a shaft (19) of the conical-pulley transmission (7) cooperating support member (11).

3. Arrangement according to claim 2, characterized in that the arrangement (1) in the longitudinal direction of the shaft (19) is displaceable.

4. Arrangement according to one of the preceding two claims, characterized in that the supporting part (11) has an Anformung by means of which the support member (11) rotatably and longitudinally displaceable to the shaft (19) can be assigned.

5. Arrangement according to one of the preceding claims, characterized in that the Anformung a Mitnahehlängsverzahnung (21) which meshes with one of the shaft (19) rotatably associated counter-toothing (25).

6. Arrangement (3) according to claim 1, characterized in that the conical disk (27) of a shaft (19) of the conical-pulley transmission (7) is assigned or assignable by means of friction welding.

7. Arrangement according to the preceding claim, characterized in that the conical disk (27) has an integrally formed collar (29) which is assigned to the shaft (19) by means of friction welding or can be assigned.

8. Arrangement according to claim 1, in particular according to claim 6 or 7, characterized in that the at least one further component is a support plate (31).

9. Arrangement according to claim 8, characterized in that the support plate (31) has a coaxial with the shaft (19) extending integrally formed shaft part (33).

10. Arrangement according to claim 9, characterized in that the support plate (31) has jumps in thickness causing perforations (35) and / or projections (41).

11. Arrangement according to claim 10, characterized in that the apertures (35) have bent partial cutouts, wherein projections (37) of the partial punches are assigned or assignable by means of the friction welding of the conical disk (27).

12. Arrangement according to one of the preceding claims, characterized in that the at least one further component and / or the conical disk (9; 27) are joined or joined to one another by means of the friction welding, as is the case with the tool.

13. Arrangement according to one of the preceding claims, characterized in that the at least one further component and the conical disk (9, 27) are formed from different materials.

14. conical-pulley belt transmission (7) with an arrangement (1; 3) according to one of the preceding claims.

15. A method for producing an arrangement (1, 3) of components of a conical-pulley transmission (7) with a variably adjustable transmission ratio, with a conical disk (9, 27) and at least one further component, with punching or stamping of the conical disk (9; 27) and / or the at least one further component, in particular an arrangement (1; 3) according to one of claims 1 to 13, characterized by joining the conical disk (9; 27) with the at least one further component by means of friction welding.