EP3966469A1

EP3966469A1 - Stop assembly for damper masses of a damper system

Info

Publication number: EP3966469A1
Application number: EP20726725.3A
Authority: EP
Inventors: Jörg Bender; Michael Wirachowski; Matthias Kram; Kyrill Siemens; Volker Stampf; Reinhold Fischer
Original assignee: ZF Friedrichshafen AG
Current assignee: ZF Friedrichshafen AG
Priority date: 2019-05-08
Filing date: 2020-05-08
Publication date: 2022-03-16
Also published as: CN113853491B; US20220186813A1; US11946521B2; WO2020225404A1; CN113853491A; DE102019206575A1

Abstract

A stop assembly (10) for damper masses (7) of a damper system (1) has a stop device (12) and a stop device carrier (11) which holds the stop device. The stop device (12) has at least one shoulder (20; 20a), which is intended to engage in at least one associated receiving portion (25; 25a) of the stop device carrier (12). In at least one support region (P1, P2a, P2b), the shoulder (20; 20a) is oversized (22) relative to the associated receiving portion (25; 25a) to facilitate captive engagement in the receiving portion (25; 25a), and, at a distance from the at least one support region (P1, P2a, P2b), the shoulder is undersized (23) relative to the associated receiving portion (25; 25a) to facilitate assembly-simplifying engagement in the receiving portion (25; 25a).

Description

Attachment arrangement for Tilqermassen a Tilqersvstems

The invention relates to a stop arrangement for damper masses of a damper system, comprising a stop device and a stop device carrier receiving the same.

Such a stop arrangement is known from DE 10 2015 225 635 A1, the stop device carrier serving as reinforcement for the stop device formed from an elastomer. Such a stop arrangement formed from two components is suitable even for highly loaded damper systems, such as, for example, in hybridized drive trains, since the energy of the damper masses can be reduced sufficiently well due to the stop device. The stop arrangement is suitable both to limit the relative deflection of the Tilgermas sen against a damper mass carrier in normal operation, as well as to avoid extreme deflections of the damper masses that can occur both when starting an internal combustion engine upstream of the damper system or when switching off this internal combustion engine, as long as the Damper masses an acting weight force exceeds the rotational centrifugal force.

The connection of the stop device to the stop device carrier can take place in different ways, namely by an adhesive connection, by an integral design or by a form fit. While the first two connection methods require a relatively complicated manufacturing process to connect the stop device to the stop device carrier, there is a problem with a connection by form fit when there is little play between the areas to be brought into shape, the problem of the two parts with each other to bring into operative connection, while when there is a lot of play between the areas that come into positive engagement, it cannot be ensured that the stop device will inadvertently detach itself from the stop device carrier during the manufacturing process.

The invention is based on the object of training a stop arrangement in such a way that the respective Stop device with the associated stop device carrier the produc- tion of an operative connection between the two parts is possible without any problems in order to be secured against accidental loosening once the connection is made.

To solve this problem, a stop arrangement for damper masses of a Til gersystem is provided, which has a stop device and a stop device carrier receiving the same. It is important here that the stop device has at least one approach which is intended to engage in at least one associated receptacle of the stop device carrier, the approach being overdimensioned compared to the associated receptacle in at least one support area in favor of a loss-proof engagement in the receptacle , and for the benefit of an assembly-simplifying engagement in the receptacle at a distance from the at least one support area is undersized compared to the associated receptacle.

The particular advantage of the connection between the stop device and the stop device carrier is achieved by the special design of the attachment of the stop device in relation to the associated receptacle of the stop device carrier, namely by the formation of the approach in relation to the receptacle with an excess of a support area and with an undersize at another support area. While the undersize thus brings sufficient play in the corresponding support area, and thereby simplifies the introduction of the set in the corresponding receptacle, the oversize ensures a hold of the approach in the corresponding receptacle, and thus acts in the sense of a Ver loss protection for the anchor device relative to the stop device carrier, at least until the manufacturing process of the stop assembly is completed. This can be the case, for example, when the stop arrangement is to be provided axially between cover elements, and these cover elements are fixed to one another at a fixed axial distance by means of spacers. Such cover elements are usually provided with guideways for receiving coupling elements which also engage in guideways of the damper masses and thereby cause the cover elements to be coupled to the damper masses. The cover elements are referred to below as track elements for short because of their design with guide tracks.

With particular preference, the respective attachment of the stop device as well as the corresponding receptacle of the stop device carrier are each provided in the circumferential area of a spacer and in each case in a radial area that extends radially between the corresponding spacer and a support area of the stop device carrier extending radially within it. Alternatively or in addition to this, the respective approach of the stop device as well as the corresponding receptacle of the stop device carrier can also be provided in the circumferential area between two spacers and in a radial area of the stop device carrier extending between the radial outside and the radial inside of the stop device carrier.

Both the stop device carrier and the respective stop device can each have a material recess due to centrifugal force in the circumferential area of a spacer on its radial outer side. The reason for this is that the material of the stop device is not supported radially outside of a spacer against the effect of centrifugal force, and especially if the stop device is made of very soft elastomeric material, it lifts this area under the action of centrifugal force can come from the spacer, especially since the stop device can have a rich accumulation of material in this area. The aforementioned problem is effectively helped by the material recess at this point of the stop device.

An at least insufficient support for the stop device can also be present in the circumferential area between two spacers. For this reason, it can be advantageous to provide the respective stop device with a centrifugal force-induced material recess in this circumferential area as well. At this point, too, this is particularly advantageous if the stop device consists of very soft elastomeric material and it is therefore under the effect of centrifugal force this area can lift from the anchor device carrier.

A particularly stable static connection of the stop device to the stop device carrier is present when the at least one approach of the stop device has at least three support areas that are oversized compared to the associated reception of the stop device carrier, where preferably two reception areas in the circumferential direction on both sides of a third reception area are provided, and attack in the radial direction on opposite sides of the recording as this third recording area. This connection can be established particularly advantageously if the at least one shoulder of the stop device has the at least one support area formed with an undersize in relation to the assigned receptacle of the stop device carrier in the circumferential direction at least essentially in the same area as the at least one with an oversize compared to the assigned Recording from the support area formed, but in the radial direction on the opposite side. The approach can then, by applying force in the direction of the undersize, be deflected in such a way that the undersize can be used to introduce the approach into the corresponding receptacle. Once introduced into the receptacle, this application of force can be ended, so that the approach can return to its original position, in which the excess relative to the receptacle is noticeable in a loss-preventing manner, as an unintentional detachment of the approach from the corresponding receptacle is effectively avoided.

The stop device carrier preferably has ramps which, starting from the axial outer sides of the stop device carrier and extending in the direction of the axial center of the stop device carrier, have a radial slope and are provided for the insertion of appropriately designed attachments, the ramps each in the axial extension area the axial outer sides of the stop device carrier have a radial flattening caused by a tool-related run-out. Due to the radial slope of the ramps, the approaches run smoothly from the axial outer sides of the stop device carrier in the direction of the axial center of the stop device. device carrier can be used, whereby the tool-related run-out in the axial extension area of the axial outer sides leads to a radial narrowing of the receptacle and thus to an excess, which acts as a loss protection for the approaches against the receptacle of the anchor device carrier and thus a loss protection for the anchor device during Assembly is used.

A clip connection can also be used as a safeguard against loss during assembly, which is effective in the circumferential area between two spacers and in a radial area of the stop device carrier extending between the radial outer side and the radial inner side of the stop device carrier.

The stop arrangement is explained below with reference to a drawing. It shows:

Fig. 1 shows a damper system in plan view with effective as a damper mass carrier

Track elements, which are connected to one another by means of spacers, and with a stop arrangement which has a stop device carrier and a stop device;

FIG. 2 shows a sectional illustration according to the section line AA in FIG. 1; FIG.

3 shows a drawing of the stop arrangement to show the support from the stop device on the stop device carrier with areas recessed due to centrifugal forces;

4 shows the stop arrangement of FIG. 3 according to the section line B - B

FIG. 5 shows the stop arrangement of FIG. 3 according to section line C - C

FIG. 6 like FIG. 3, but with further areas cut out due to centrifugal force; FIG.

FIG. 7 like FIG. 5, but with at least approximately conical contours on that

Anchor device carrier and on the anchor device; 8 shows a stop arrangement with a clip connection between the stop device carrier and the stop device;

9 shows an enlarged sectional illustration of the region of the clip connection;

10 shows a stop arrangement showing suitable locations for a weld line of the stop device.

1 and 2 show a damper system 1 with a central axis 2 and with two track elements 4a, 4b serving as damper mass carriers 3, which are fixedly arranged by spacers 5 at a predetermined axial distance from one another. The track elements 4a, 4b have guide tracks 6 with a curvature, the apex 13 of which is at a maximum distance from the central axis 2. The track elements 4a, 4b take up damper masses 7 axially between them that have guide tracks 8, these guide tracks 8 having their apex 14 at a minimal distance from the central axis 2. The guide tracks 6 of the track elements 4a, 4b and the guide tracks 8 of the damper masses 7 are connected to each other by coupling elements 9. These coupling elements 9 are roles that enable the damper masses 7 through their rolling movement in the guideways 6, 8 a rela tive movement relative to the track elements 4a, 4b and thus against the Til germassträger 3.

A stop arrangement 10 for the Tilgerma ssen 7 is provided radially within the damper masses 7. The stop arrangement 10 has a stop device carrier 11 and a stop device 12. The stop device carrier 11 has openings 31 (FIGS. 4 and 5) for the passage of the spacers 5 at intervals of 90 °, and is therefore received by means of the spacers 5 on the Tilgermas sträger 3. With the exception of the areas surrounding the spacers 5, the radial outside 15 of the stop device support 11 is enclosed by the stop device 12 which, as can be seen in FIG. 2, has two stop device parts 31 a and 31 b in the axial direction. In contrast to the impact device carrier 11, which consists of a preferably solid material, the stop device 12 is preferably designed as an elastomer and is therefore also able to advantageously dampen hard impacts of the damper masses 7.

The attachment of the stop device 12 to the stop device carrier 11 will be explained in more detail below with reference to FIGS. 3 to 5. According to Fig. 3, the stop device 12 is held on the one hand in the circumferential area U1 of a spacer 5, and on the other hand in the circumferential area U2 between each two spacers 5, so for example in the circumferential direction in the middle between each two spacers 5. In the radial direction is the stop device 12 held in the circumferential area U1 of the respective spacer 5 in a first radial area 17, which extends radially between the respective spacer 5 and a support area 19 of the stop device carrier 11 extending radially within it, and in the circumferential area U2 between two spacers 5 in a second radial area 18 of the stop device carrier 11, which extends radially between the radial outer side 15 of the stop device carrier 11 and the radial inner side 16 of the sen.

In Fig. 3, in association with one of the spacers 5, contact arrows are shown, namely a central contact arrow P1 in the circumferential direction, which is directed towards the central axis 2, and, in the circumferential direction on both sides of this central contact arrow P1, two lateral contact arrows P2a and P2b . At the contact points indicated by these contact arrows P1, P2a and P2b, the stop device 12, as will be shown in detail below, each has an oversize compared to the stop device carrier 11, namely, as regards the contact arrow P1, compared to the spacer 5 and, as far as the contact arrows P2a and P2b are concerned, in each case opposite the support region 19 of the stop device carrier 11. The stop device 12 is drawn out at the point of the contact arrow P2a on the left in FIG. 3 by a section C - C in FIG. 5, from which can be seen is that each of the stop device part 31 a or 31 b of the stop device 12 axially engages with a projection 20 in a receptacle 25 of the stop device carrier 11, the radial inner sides of the projections 20 in FIG. 5, which are oversized with respect to the receptacle 25 each identified by the reference number 22 are upscale. The radial outer sides of the lugs 20 are, however, as FIG. 5 also illustrates, formed with an undersize compared to the receptacle 25 of the impact device carrier 11, which is highlighted in FIG. 5 by the reference numeral 23. As far as the stop device 12 is concerned at the point of the contact arrow P1 in the center in FIG. 3, it is drawn out by a section B - B in FIG. 4, from which it can be seen that here the radial outer sides of the attachments 20 are each with an oversize 22 against the receptacle 25 are formed, and the radial inner sides of the lugs 20 with an undersize 23 ge compared to the receptacles 25 of the stop device carrier 11. By each of the engaging in a receptacle 25 approach 20 each a support area 28 is gebil det.

In favor of a simple insertion of the stop device 12 into the stop device carrier 11, use is made of the fact that the radial opposite side of a section of a stop device part 31 a, 31 b designed with oversize 22 is always combined with a section designed with undersize 23.

By applying a radial force, which is aligned with these contact arrows P1, P2a and P2b at the points of the contact arrows P1, P2a and P2b shown in FIG. 3, the stop device 12 can be opened due to the play that is created by the contact arrows present at this point Undersize 23 results, insert easily by shifting the respective stop device part 31 a, 31 b of the two-part stop device 12 axially in the direction of the stop device carrier 11 until the lugs 20 are each at least substantially immersed in the corresponding receptacle 25 of the stop device carrier 11 . Once arrived in this posi on, the stop device 12, as soon as it is free of the forces required for the insertion, is held secured against loss by the stop device carrier 11 due to the oversize 22 between the lugs 20 and the corresponding receptacles 25.

In addition to the support areas 28 for the stop device 12 in the circumferential areas U1 of the spacers 5, the stop device 12 can have further support areas 28a in the circumferential direction U2 between two spacers 5 by providing further lugs 20a, which are in corresponding Recesses 25a of the anchor device carrier 11 engage. According to FIG. 10, this can for example be in the middle between two spacers 5. Also on these support areas 28a, the lugs 20a are formed on one radial side with an oversize 22 and on the opposite radial side with an undersize 23 in relation to the corresponding receptacle 25a, so that the insertion of the stop element parts 31a, 31b of the stop device 12 in the stop device carrier 11 as well as the function of the anti-loss device results, as has been described above with reference to the support areas 28. The lugs 20a of the stop element parts 31a, 31b, as well as the receptacles 25a of the stop device carrier 11, are each provided in the second radial region 18 of the stop device carrier 11 extending between the radial outside and the radial inside of the stop device carrier 11.

By supplementing the support areas 28a in the circumferential direction between two support areas 28 each, the stop device 12 also has an effective radial support against centrifugal forces between each two Ab spacers 5. In contrast, circumferential areas 26 of the stop device 12, which extend in the circumferential direction between the support areas 28 and 28a, and do not have connections between the stop device carrier 11 and the stop device 12 in the sense of the aforementioned support areas 28 or 28a are less resilient to centrifugal forces.

For better adaptation of these peripheral areas 26 to the unavoidable centrifugal forces 10 material recesses 21 are provided according to FIG. 3 or FIG. Because of the lower mass, these circumferential areas 26 can be better supported by means of the adjacent support areas 28 or 28a. Areas of the stop device 12, which would otherwise be located radially outside the respective spacer 5, and thus could not be supported against centrifugal forces by this, are also formed with material recesses 27. Due to the material recesses 27, it is avoided that areas of the limit stop device 12 can detach from the spacers 5 and thus from the support areas 28 under centrifugal force. The consideration of material recesses 21 or 27 is implemented particularly consistently in the embodiment according to FIG. 6. Instead of stop devices 12, which approximately enclose the respective stop device carrier 11 as in FIG. 3, or from stop devices 12, which form the corresponding stop device carrier 11 as in FIG. 10 by means of stop strips 32 extending between two spacers 5, the limit device has 12 according to FIG. 6 only have stop bar segments 33 which, starting from the respective circumferential area U 1, extend at least essentially up to the respective circumferential area U2, and thus have comparatively large material recesses 21 or 27. The stop bar segments 33 are preferably supported in support areas 28a1, 28a2 with respect to the stop device 11.

Returning to the support areas 28, 28a shown in FIG. 10, these can be used for a further positive effect. This is because any weld lines 29 of the stop device 12 are accommodated at these points, which result in the manufacture of the stop device 12 by injecting elastomeric material into a workpiece carrier. In the support areas 28, 28a acting stretching forces are minimized, whereby a predetermined breaking point is avoided.

If the stop device carrier 11 is provided on its radial outside 15, as shown in FIG. 7, with at least essentially conical ram pen 34 in the axial direction, then the radial inside 36 of the stop device parts 31a and 31b are preferably also at least in the axial direction Essentially conically designed to run. The axially outer section of the ramps 34 can, caused by a tool-related run-out, have a radial flattening 35 ge compared to the part of the ramps 34 tapering towards the component center 36. This creates an oversize 22 on the stop device 12 in the area of the radial flattening 35, even if this is preferably ausgebil det with an undersize 23, which, however, can only have an effect axially away from the radial flattening 35.

According to FIG. 8, in each case in the circumferential area between two spacers 5 and in each case in a radial area 18 of the attachment device that extends between the radial outer side 15 and the radial inner side 16 of the stop device carrier 11 Striker device carrier 11 is provided a clip connection 39 which acts between the stop device 12 and the stop device carrier 11 and serves as a loss protection 38 for the stop device 12 with respect to the stop device carrier 11 during assembly. As FIG. 9 shows in detail, the stop device 12 has an axially elastic lip 40 which extends radially inward to form this clip connection 39 and which, when pushed over a radially outer web 41 of the stop device carrier 11, is axially deflected, so that when the process of pushing is completed, with springback to its axial starting position to reach behind this web 41 radially

Refers to the Tilgersystem

Central axis

Damper mass carrier

Track elements

Spacers

Guideways

Absorber masses

Guideways

Coupling elements

Stop arrangement

Anchorage device carrier

Anchor device

Vertex

radial outside of the stop device carrier radial inside of the stop device carrier first radial region of the stop device carrier second radial region of the stop device carrier support region

approach

Material recesses

Excess

Undersize

Support areas

admission

Scopes

Material recesses

Support areas

Weld lines

Opening for spacers

Anchor components Bars of the anchorage device

Bar segments of the ramp anchor device

Radial flattening

radial inner sides of the anchor device parts

Component center

Loss protection

Clip connection

axially elastic lip

Web of the anchorage device carrier

Claims

1. Stop arrangement (10) for damper masses (7) of a damper system (1), having a stop device (12) and a stop device receiving the same device carrier (11), characterized in that the stop device (12) has at least one approach (20; 20a ) has, which is intended to engage in at least one associated receptacle (25; 25a) of the stop device carrier (12), where the approach (20; 20a) in favor of a loss-proof engagement in the receptacle (25; 25a) in at least one Support area (P1, P2a, P2b) has an oversize (22) compared to the assigned receptacle (25; 25a), and in favor of an assembly-simplifying engagement in the receptacle (25; 25a) at a distance from the at least one support area (P1, P2a, P2b) ) has an undersize (23) compared to the associated receptacle (25; 25a).

2. Stop arrangement (10) according to claim 1, characterized in that the at least one extension (20; 20a) of the stop device (12) is at least three oversized (22) with respect to the associated receptacle (25; 25a) of the stop device carrier (11) executed support areas (P1, P2a, P2b), preferably two support areas (P2a, P2b) are provided in the circumferential direction on both sides of a third support area (P1), and act in the radial direction on opposite sides of the receptacle (25; 25a) like this third Recording area (P1).

3. Stop arrangement (10) according to claim 1, characterized in that the at least one shoulder (20; 20a) of the stop device (12) has at least one undersized (23) opposite the associated receptacle (25; 25a) of the stop device carrier ( 11) has formed support area ((P1, P2a, P2b) in the circumferential direction at least essentially in the same area as the at least one support area (P1, P2a, P2b) formed with an oversize (22) relative to the associated receptacle (25; 25a) ), but in the radial direction on the opposite side.

4. stop arrangement (10) according to claim 3, characterized in that the at least one extension (20; 20a) of the stop device (12) by force impact in the direction of its undersize (22) relative to the receptacle (25; 25a) of the stop device carrier (1 1) for introduction into the corresponding receptacle (25; 25a) is deflectable, and that the approach (20; 20a) by lifting this application of force after being introduced into the receptacle (25; 25a) as a result of returning to its original position, its oversize relative to the receptacle (25; 25a) of the anchor device carrier (11) can be used to prevent loss.

5. stop arrangement (10) according to any one of claims 1 to 4, characterized in that the respective extension (20; 20a) of the stop device (12) before Mon days of the same on the stop device carrier (1 1) on the receptacle (25; 25a ) of the stop device carrier (1 1) is trimmed, can be introduced into its receptacle (25; 25a) by a movement directed towards the stop device carrier (1 1) and through the support areas formed with an oversize (22) relative to the associated receptacle (25; 25a) (P1, P2a, P2b) is held captive in the end position of this movement.

6. stop arrangement (10) according to claim 5, characterized in that the stop device carrier (1 1) has ramps (34) which, starting from the axial outer sides of the stop device carrier (1 1) and extending in the direction of the axial component center ( 37) have a radial slope and are provided for receiving (25; 25a) lugs (20), the ramps (34) in the axial extent area of the axial outer sides of the stop device carrier (1 1) each caused by a tool-related runout Ra dial flattening (35), which in cooperation with the corresponding at set (20) forms an oversize that for the approach (20) of the stop device (12) relative to the receptacle (25; 25a) of the stop device carrier (1 1) during the Assembly is effective to prevent loss.

7. stop arrangement (10) according to claim 5 with both sides of the stop device carrier (1 1) and the stop device (12) arranged, guide tracks (6) for the damper masses (7) of the damper system (1) having track elements (4a, 4b), the are held in a predetermined relative position to one another by means of spacers (5), characterized in that the respective attachment (20) of the Impact device (12) as well as the corresponding receptacle (25) of the impact device carrier (11) each in the circumferential region (U1) of a spacer (5) and each in a first radial region (17) are provided, the ra dial between the corresponding Spacer (5) and a radially inner half thereof extending support region (19) of the stop device carrier (11).

8. Stop arrangement (10) according to claim 6 or 7 with both sides of the Stoppein direction carrier (11) and the stop device (12) arranged, guide tracks (6) for the absorber masses (7) of the absorber system (1) having Bahnele elements (4a, 4b ), which are held in a predetermined relative position to one another by means of spacers (5), characterized in that the extension (20a) of the stop device (12) as well as the corresponding receptacle (25a) of the stop device carrier (11) each in a circumferential area ( U2) in the circumferential direction between two spacers (5) and in a between the radia len outside (15) and the radial inside (16) of theschlageinrichtungsträ gers (11) extending second radial region (18) of the stop device carrier

(11) are provided.

9. stop arrangement (10) according to claim 7, characterized in that in each case in the circumferential region (U2) between two spacers (5) and in each case between the radial outer side (15) and the radial inner side (16) of the impact device carrier ( 11) extending radial region (18) of the stop device carrier (11) has a clip connection (39) which is effective between the stop device (12) and the stop device carrier (11) and which prevents the stop device (12) from being lost against the stop device carrier (11) during assembly ) is provided.

10. Stop arrangement (10) according to claim 7, characterized in that both the stop device carrier (11) and the respective stop device

(12) each in the circumferential area (U1) of a spacer (5) have a material recess (27) caused by centrifugal force on the radial outside thereof.

11. Stop arrangement (10) according to claim 8, characterized in that the respective stop device (12) in the circumferential region (U2) between two spacers (5) have a centrifugal force-induced material recess (21).