DE102020119292A1 - Holding device for a slide rail for a belt transmission, belt transmission, drive train and vehicle - Google Patents

Abstract

The invention relates to a holding device (2) for a slide rail (1) for a belt transmission, the slide rail (1) having a slide channel (4) which is delimited by slide surfaces (5, 6) for guiding an endless belt, and a base (3 ), wherein the base (3) has two legs (9, 10), which are each formed by two fork-like tongues (11, 11'; 12, 12'), and the base (3) with the legs (9 , 10) forms a swivel mount and the slide rail (3) is pivotably mounted on a holding tube (13) of the holding device (2) by means of the swivel mount. Two axial stops (14) are provided on the holding device (2) in an axial extension of the holding tube (13) on both sides, the axial extent of which is greater than the distance between the legs (9, 10) of the swivel mount and/or their extent perpendicular to the axis of the holding tube (13) is greater than the distance between the fork-like tongues (11, 11'; 12, 12') in the area of the bearing on the holding tube (13).

Description

The invention relates to a holding device for a slide rail for a belt transmission, the slide rail comprising a slide channel, which is delimited by slide surfaces for guiding a belt means, and a base, the base having two fork-like tongues, each of which forms one of two legs of a pivot mount. has, and wherein the slide rail is pivotally mounted by means of the pivot mount on a holding tube of the holding device. The invention also relates to a belt drive with such a holding device for a slide rail, a drive train with the belt drive and a motor vehicle with the belt drive.

A belt transmission, also known as a belted pulley transmission or as a CVT (continuous variable transmission) for a drive train, for example a motor vehicle, comprises at least one pair of conical pulleys on the input side arranged on a transmission input shaft and a pair of conical pulleys on the output side arranged on a transmission output shaft, as well as one for torque transmission between the Conical pulley pairs provided belt. A pair of conical disks comprises two conical disks which are aligned towards one another with corresponding conical surfaces and can be moved axially relative to one another. As a rule, a (first) conical disk, also known as a loose disk or displacement disk, can be displaced along your shaft axis and a (second) conical disk, also known as a fixed disk, is fixed in the direction of the shaft axis. Alternatively, both conical disks of a conical disk pair can be displaced. Such belt transmissions have long been, for example from the DE 100 17 005 A1 known.

During operation of the belt transmission, the belt is displaced in a radial direction between an inner position (small effective circle) and an outer position (large effective circle) due to the conical surfaces of the conical disks by means of a relative axial movement of the conical disks of a conical disk pair. The belt means thus runs on a changeable effective circle, ie with a changeable running radius. As a result, a different speed transmission and torque transmission from one pair of conical pulleys to the other pair of conical pulleys can be continuously adjusted. The belt forms two strands between the two conical disk pairs, with one of the strands forming a tight strand and the other strand a push strand, or a load strand and a slack strand, depending on the configuration and the direction of rotation of the conical pulley pairs.

The direction perpendicular to the (respective) run and pointing from the inside to the outside or vice versa is referred to as the transverse direction. The transverse direction of the first strand is therefore only parallel to the transverse direction of the second strand if the effective circles on the two conical disk pairs are of the same size. The direction perpendicular to the two strands and pointing from one conical disk to the other conical disk of a conical disk pair is referred to as the axial direction. This is therefore a direction parallel to the axes of rotation of the conical disk pairs. The third spatial direction in the (ideal) plane of the (respective) run is referred to as the running direction or as the counter-running direction or as the longitudinal direction. The running direction, transverse direction and axial direction thus span a (during operation) moving Cartesian coordinate system. Although the aim is for the running direction to form the ideal, shortest connection between the adjacent working circles of the two conical pulley pairs, the alignment of the respective strand can deviate temporarily or permanently from this ideal, shortest connection in dynamic operation.

In such continuously variable transmissions, at least one damping device is provided in the free space between the conical disk pairs. Such a damping device can be arranged on the tight strand and/or on the push strand, preferably only on the respective load strand, of the belt and serves to guide and thus limit vibrations of the belt. Such a damper device is to be designed with a focus on acoustically efficient traction means guidance (enveloping means guidance). The length of the adjacent (sliding) surface for guiding the belt means and the rigidity of the damper device are decisive influencing factors. A damper device is designed, for example, as a sliding shoe or as a sliding guide with a sliding surface on the inside only on one side, usually due to the installation space (transversal to the belt means), ie arranged between the two strands. Alternatively, the damper device is designed as a slide rail with a sliding surface on both sides, i.e. both on the outside, i.e. outside of the wrap circle formed, and on the inside sliding surface for the relevant strand of the belt. A sliding surface is also referred to as a guiding surface. In the case of a slide rail, the two transversely opposite one another, i.e. antagonistic or antagonistic to the thing to be damped Trum acting, sliding surfaces collectively referred to as guide channel or slide channel.

The damper device is mounted on a pivot means with a pivot axis by means of a pivot means mount, as a result of which pivoting of the damper device about the pivot axis is made possible. In some applications, the damper device can also be moved transversally, so that the damper device follows a (steeper oval) curve that deviates from a circular path around the pivot axis. The swivel axis thus forms the center of a (two-dimensional) polar coordinate system, with the (pure) angular movement corresponding to the change in the polar angle and the transversal movement to the change in the polar radius. This translational movement, which overlays the pure angular movement, ie is superimposed, is disregarded in the following for the sake of clarity and is summarized under the term pivoting movement. The pivot axis is aligned transversely to the running direction of the belt, ie axially. This ensures that when the active circles of the belt drive are adjusted, the damper device can follow the resulting new (tangential) alignment of the belt drive.

• - Verliersicherung, wobei die Dämpfereinrichtung auf dem Schwenkmittel mit geringem Aufwand montierbar sein muss, aber zugleich eine minimale Haltekraft vorhanden sein muss. Dafür soll der Sockel flexibel sein. Die Gleitschiene ist nach der Montage an einer ein Halterohr umfassenden Halteeinrichtung, welche am Getriebegehäuse befestigt sein kann, in ihrer axialen Bewegung mittels an dem Halterohr vorgesehener Axialanschläge in ihrer axialen Bewegung begrenzt.
• - Führung von der Dämpfereinrichtung auf dem Schwenkmittel für eine hohe Sitzsteifigkeit. Um ein relatives Schwenken von der Dämpfereinrichtung zu dem Schwenkmittel zu verhindern, soll der Sockel steif sein.

A base is provided transversally below the (inner) sliding surface for the execution of the pivoting movement. Two functions can be separated for the base:

• - Protection against loss, the damper device must be able to be mounted on the pivoting means with little effort, but at the same time a minimum holding force must be present. The base should be flexible for this. After assembly on a holding device comprising a holding tube, which can be fastened to the transmission housing, the slide rail is limited in its axial movement by means of axial stops provided on the holding tube.
• - Guidance of the damper device on the pivot means for high seat rigidity. In order to prevent relative pivoting of the damping device to the pivoting means, the base should be rigid.

Proceeding from this, the object of the present invention is to at least partially overcome the disadvantages known from the prior art. The features according to the invention result from the independent claims, for which advantageous configurations are shown in the dependent claims. The features of the claims can be combined in any technically meaningful way, whereby the explanations from the following description and features from the figures can also be used for this purpose, which include additional configurations of the invention.

The object is achieved by a holding device for a slide rail for a belt transmission, the slide rail comprising a slide channel, which is delimited by slide surfaces for guiding an endless belt, and a base, the base having two legs, each of which is formed by two fork-like tongues, and whereby the base forms a swivel mount with the legs and the slide rail is pivotably mounted on a holding tube of the holding device by means of the swivel mount, solved in that two axial stops are provided on the holding device in an axial extension of the holding tube on both sides, the axial extent of which is greater than the distance between the legs of the swivel mount and/or the extension thereof perpendicular to the axis of the holding tube is greater than the distance between the fork-like tongues in the area of the bearing on the holding tube.

One solution provides that the axial stops themselves have a greater extent in the axial direction than the distance between the legs of the swivel mount. The other solution is that the axial stops perpendicular to the holding tube (in the circumferential direction) have a greater extent than the distance between the tongues of the two legs. Incorrect assembly, in which only one leg is attached in the area of the holding tube provided for the pivoting movement and the other leg is not, is thus ruled out with both solutions. Both solutions can also be combined.

In a further development of the holding device for a slide rail, the slide rail used comprises two rail halves, with the two rail halves preferably being of identical design. A division in the running direction of the belt means is particularly preferred, so that the two rail halves can be easily joined around the belt means which is already closed.

The holding device for a slide rail can also have a holding tube with an opening for supplying lubricant and/or coolant to the belt transmission. With a corresponding orientation and configuration of the opening, the lubricant and/or coolant can thus be guided in a targeted manner to the belt means and/or the conical pulleys.

• 1a: eine Halteeinrichtung für eine Gleitschiene, sowie eine Gleitschiene;
• 1b: eine Halteeinrichtung für eine Gleitschiene, sowie eine Gleitschiene aus 1a in perspektivischer Ansicht;
• 2a: eine andere Ausführungsform einer Halteeinrichtung für eine Gleitschiene, sowie eine Gleitschiene;
• 2b: eine andere Ausführungsform einer Halteeinrichtung für eine Gleitschiene, sowie eine Gleitschiene in perspektivischer Ansicht;

The invention also includes a belt transmission with a holder according to the invention device for a slide rail, a drive train with such a belt transmission and a motor vehicle with the drive train.

• 1a : a holding device for a slide rail, and a slide rail;
• 1b : a holding device for a slide rail, and a slide rail 1a in perspective view;
• 2a : another embodiment of a holding device for a slide rail, as well as a slide rail;
• 2 B 1: another embodiment of a holding device for a slide rail and a slide rail in a perspective view;

In 1a a holding device 2 for a slide rail 1 and a corresponding slide rail 1 are shown. 1b shows the same holding device 2 and slide rail 1 in a perspective view, so that the description can be read on both figures. The slide rail 1 has a base 3, which comprises two legs 9, 10, each consisting of two fork-like tongues 11, 11', 12, 12'. The guide rail 1 forms a sliding channel 4 for guiding or damping a belt means, which is delimited by sliding surfaces 5, 6. The slide rail 1 itself is composed of two slide rail halves 7, 8, which are joined in the running direction of the belt means, for example by means of a clip connection. The slide rail 1 can be mounted on the holding device 2, namely on the holding tube 13, in that the legs 9, 10 with the openings between the tongues 11, 11', 12, 12' are pushed onto the holding tube 13. There are axial stops 14 on both sides of the holding tube 13, the axial extent of which (in the direction of the main axis of the holding tube) is greater than the distance between the legs 9, 10. This means that assembly is only possible on the holding tube 13 and not inadvertently in the area of the axial stops 14. The counterpart to the axial stops 14 are stop surfaces 18 on both sides of the legs 9, 10 on the slide rail. The holding tube 13 has an opening 15 through which coolant and/or lubricant can be routed to the belt and conical pulley parts of the belt transmission, which are not shown.

the 2a and 2 B again show a front view and a perspective view of another embodiment of a holding device 22 for a slide rail 1. Since the slide rail 1 is identical to the slide rail in FIGS 1 a and 1b only the differences will be discussed here. In contrast to the holding device 2 from FIGS. 1a, 1b, the part of the axial stop 16 shaped like a prism is shorter in this embodiment and has an axial extent smaller than the distance between the legs 9, 10. However, in each case an additional tubular element 17 connects to the outside, directed away from the holding tube 13, the diameter of which is greater than the mounting distance between the tongues 11, 11' and 12, 12'. Thus, assembly is only possible on the holding tube 13 and not inadvertently in the area of the axial stops 16 or in the area of the tubular elements 17.

Reference List

1

sliding rail

2, 22

holding device

3

base

4

sliding channel

5, 6

sliding surfaces

7.8

slide rail halves

9, 10

leg

11, 11', 12, 12'

forked tongues

13

holding tube

14, 16

axial stops

15

opening

17

raw element

18

stop faces

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 10017005 A1 [0002]

Claims (6)

Holding device (2) for a slide rail (1) for a belt transmission, the slide rail (1) comprising a slide channel (4) which is delimited by slide surfaces (5, 6) for guiding an endless belt, and a base (3). the base (3) has two legs (9, 10), each of which is formed by two fork-like tongues (11, 11'; 12, 12'), and the base (3) with the legs (9, 10) has a forms a swivel mount and the slide rail (3) is pivotably mounted on a holding tube (13) of the holding device (2) by means of the swivel mount, characterized in that two axial stops (14) are provided on the holding device (2) in an axial extension of the holding tube (13) on both sides are provided, the axial extent of which is greater than the distance between the legs (9, 10) of the swivel mount and/or the extent of which perpendicular to the axis of the holding tube (13) is greater than the distance between the fork-like tongues (11, 11'; 12 , 12') in the storage area ng on the holding tube (13). Holding device (2) according to one of the preceding claims, characterized in that the slide rail (1) comprises two rail halves (7, 8), the two rail halves (7, 8) preferably being of identical design. Holding device (2) according to one of the preceding claims, characterized in that the holding tube (13) has an opening (15) for supplying lubricant and/or coolant to the belt transmission. Continuous transmission for a drive train, having at least the following components: - A transmission input shaft with a pair of conical pulleys on the input side; - A transmission output shaft with an output-side conical disk pair; - A belt means, by means of which the conical disk pairs are connected to one another in a torque-transmitting manner; - at least one holding device (2) for a slide rail (1) according to one of the preceding claims, wherein the at least one slide rail (1) for damping the belt means rests with a sliding surface (5, 6) on a strand of the belt means. Drive train, comprising at least one drive machine with a machine shaft, at least one consumer and a belt transmission claim 4 , wherein the at least one machine shaft can be connected to the at least one consumer with a variable transmission ratio for torque transmission by means of the belt transmission. Motor vehicle, having at least one driving wheel, which by means of a drive train claim 5 is drivable.

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