WO2009149957A1

WO2009149957A1 - Shock absorber arrangement for a motor-driven two-wheeler

Info

Publication number: WO2009149957A1
Application number: PCT/EP2009/004290
Authority: WO
Inventors: Christian Klein
Original assignee: SGF SüDDEUTSCHE GELENKSCHEIBENFABRIK GMBH & CO. KG
Priority date: 2008-06-13
Filing date: 2009-06-15
Publication date: 2009-12-17
Also published as: DE102008028249A1

Abstract

The invention relates to a shock absorber arrangement (10, 110) for a motor-driven two-wheeler, comprising a torque input member, a torque output member and a shock absorber part, which is arranged between the torque input member and the torque output member and is designed for the damped transmission of a torque (M_κ) from the torque input member to the torque output member. The shock absorber part comprises a joint disc (32, 132).

Description

Shock absorber arrangement for a motor-driven two-wheeler

The invention relates to a shock absorber arrangement for a motor-driven two-wheeler comprising a torque input member, a torque output member and a jerk member disposed between the torque input member and the torque output member and adapted for damped transmission of torque from the torque input member to the torque output member.

Such a damper assembly used in motorcycle engines is already known in the art, the motorcycle engine including a motor for generating engine torque and a transmission for translating engine torque, the transmission having a transmission input and a transmission output. A primary drive connected to the transmission input serves to transmit the engine torque to the transmission and a secondary drive connected to the transmission output serves to transmit the translated engine torque from the transmission to a driven wheel of the motorcycle. As a secondary drive, chain drives, cardan drives or toothed belt drives are used in practice.

It is known that due to the non-uniformity of the engine, which has an effect especially at low speeds and a small number of engine cylinders (for example, single-cylinder engines), undesirable vibrations occur in the drive train. Furthermore, load changes and accelerations, especially in single-cylinder engines, which have a high liter output (power per liter displacement), but have a comparatively low compared to the rotational mass in the secondary drive engine flywheel, to torsional vibrations or steep torque changes on the transmission and the clutch act back and burden them in this way noticeable. Vibrations occurring in the drive train are perceived on the one hand by the driver as a disturbance in the form of unwanted noise and jerky handling of the motorcycle and on the other hand significantly shorten the life of the components used in the drive train, such as the transmission and the clutch.

For this reason, in the motorcycles known from the prior art, as is known from document DE 10 2005 051 213 A1, shock absorbers in the range of seconds are used. used därantriebes, which are usually installed between the sprocket of the rear wheel and the rear wheel rim or a corresponding adapter. Such a shock absorber comprises, for example, an injection-molded housing, which is formed by a chainring carrier carrying the chainring of the sprocket and the adapter or the rim, as well as a plurality of elastomer bodies, which are arranged between the chainring carrier and the adapter or the rim. The chainring carrier and the rim or the adapter are for this purpose equipped with drive cams, which engage opposite in the elastomer body. When occurring load in Zugbzw. Shear direction, the drivers are damped over the elastomer body. A lo power transmission takes place accordingly as soon as the driver over an elastomeric body "to stop".

However, starting from such shock absorbers, some disadvantages are known in practice. Thus, with the help of the elastomer body, the damping or the power transmission between the chainring carrier and the rim or the adapter is difficult to coordinate. Other disadvantages of such solutions are the relatively high weight and the complex installation of the shock absorber.

From the document AT 179 720 B, a rear-wheel drive for motorcycles 20 is also known, in which between the drive sprocket and the rear hub, a rubber disc is provided, which should compensate for elastic non-uniformities of the internal combustion engine as an elastic intermediate member. The rubber disc is perforated for connection to the rear hub or the drive sprocket and preferably provided with fabric inserts. In the holes of the rubber disc 5 engage from one side firmly connected to the drive sprocket driving pin and from the other side to the hub mounted counter bolt.

Furthermore, from the document US 7 083 022 B2 an elastic drive coupling element is known, which is made of an elastic material to dampen rotational o ungleichförmigkeiten.

From the document DE 197 42 361 Al finally a joint disc is known, as used in automotive powertrains. On the other hand, an object of the present invention is to reduce Schwingun ^¬ conditions that occur in the drive train in the simplest and most cost-effective manner. This object is achieved by a shock absorber arrangement of the type described, in which it is provided that the jerk damping member comprises a flexible disc, which in turn comprises an elastomeric body. It is further contemplated that in the elastomeric body of the flexible disc bushings are vulcanized, which are formed to receive the connecting means, wherein the bushes are surrounded in pairs by Schiingenpaketen.

By using a flexible joint as a shock-absorbing member, instead of the multi-part shock absorber, as is known from the prior art, a single part can be used in the motorcycle drive, which performs the function of shock absorption. This significantly facilitates the assembly, as not a large number of parts must be mounted, but only the already preformed joint disc. Furthermore, this also reduces the susceptibility of the shock absorber to damage, as a rule, with a plurality of parts (such as the elastomeric bodies) is more likely that one of them fails, as in a single. The flexible disc provides a compact and easy-to-handle part that can ensure reliable shock absorption. In addition, flexible discs already in automotive powertrains are used reliably and have proven there in long-term operation for the transmission of high torques.

Occurring vibrations are damped by the elastic behavior of the elastomer body in the transmission of the driving torque to the torque output member, so that they can not or only slightly affect the individual components of the motorcycle drive, such as transmission, possibly clutch and the like as a burden. In this case, the elastomeric body with a specific damping characteristic, for example, variable in tensile and shear direction of the flexible disc, be provided, which may vary depending on the application, ie depending on the engine characteristics of the motorcycle drive. This is a great advantage of the invention over previous systems, since, for example, when using a flexible disc with a soft identification in the direction of thrust, it is possible to generate a slight "anti-hopping effect." By "anti-hopping effect", the skilled person understands a reduction or reduction Damping the torque in the thrust direction (for example, downshifting from a higher gear to a lower gear of the motorcycle) to avoid blocking the driven rear wheel of the motorcycle. At the same time, the flexible disk can have a harder identifier in the pulling direction than in the pushing direction and is thus suitable for higher torques - A -

transmitted as a flexible disc with a uniform damping characteristic in the tensile and shear direction of the flexible disc.

Furthermore, it can be inventively provided that in the elastomer body additionally elements are introduced, which can influence the damping characteristic or even allow a variable damping characteristic of the elastomer body. In this case, it is conceivable to use elements with a deformation characteristic deviating from the elastomer body in such a way that the elastomer body or the insert part (whichever is softer) is deformed up to a certain load level and only the respective other component above this load level As a result, for example, a progressive deformation behavior can be achieved.

As an alternative to the design variant of the bush vulcanized into the elastomer body of the flexible disk, however, it is also possible according to the invention to preform the elastomer body of the flexible disk (including the shoe packages) with recesses and to subsequently insert the bushes into the recess.

With the help of the sockets can be ensured in any case that the connection means can be attached as needed within the elastomer body, for example by screwing (this, the respective socket has an internal thread) or provide a secure and defined recording of the connecting means, for example a rivet inserted through the bushing. The embedded in the elastomeric body Schiingenpakete take substantially acting through the torque to be transmitted to the flexible disc peripheral forces under tensile load. In this way, they ensure the cohesion of the elastomer body even under heavy use of the flexible disc at high torque to be transmitted. Thus, the life of such a trained joint disc is significantly increased by the Schiingenpakete used.

The Schiingenpakete be wound in conventional production of a flexible disc of threads or tapes and can be placed, for example, together with the bushes in the mold, in which they are encapsulated in a further step with rubber-elastic material and vulcanized. In a development of the invention, it can be provided that the articulated disc can be connected to the torque input element by at least one first connection means and to the torque output element through at least one second connection means. For this purpose, receiving openings for the at least first and the at least second connecting means may be provided on the flexible joint disk. About the receiving openings, the connecting means are received in the joint disc, thus enabling a torque transmission from the torque input member to the torque output member.

It can further be provided that the connecting means comprise releasable connecting elements, such as screws, rivets and the like. This is particularly advantageous because the flexible disc, should they fail due to damage or wear, can be easily replaced by a new one. For this purpose, the detachable connecting elements, such as the screws, are released, the joint disc is removed, a new is used in their place and the releasable connecting elements are used again for the preparation of the corresponding connection of the joint disc and torque input member or flexible disc and torque output member.

Furthermore, it can be provided that the torque input element is designed to be driven by a chain drive. In addition, the torque input member may include a sprocket connectable to a driven chain. In this embodiment, the chain is driven as a rotating power transmission element by a drive shaft at the transmission output of the motorcycle transmission and in turn transmits the driving force to the associated

Sprocket. Alternatively, however, it may also be provided that the torque input element is designed to be driven by a toothed belt drive, wherein a toothed belt transmits the driving force (in a manner analogous to the driven chain) to the torque input member designed as a toothed wheel as a circumferential force transmission element.

In a further alternative embodiment of the invention, the torque input element may be designed to be driven by a cardan drive. In this case, the torque input member may comprise a toothed hub, which is connectable to a Kardanabtriebsglied. In a further alternative embodiment according to the invention it can be provided that the torque input element comprises a component of a clutch of the motor-driven two-wheeled vehicle. The coupling component may be formed, for example, by a so-called coupling core or the like, which introduces a torque into the shock absorber arrangement on the coupling output side. Furthermore, the torque output member can be connectable to a transmission input of a transmission of the motor-driven two-wheeler. For example, this connection is made via a coupling disc or the like, which is connectable with an output shaft or transmission input shaft such that rotational movements can be transmitted from the coupling disc to the output shaft and thus the transmission input. In other words, in this embodiment of the invention, the jerk assembly is disposed between the clutch and the transmission of the motorcycle.

Also in this alternative embodiment of the invention, the flexible disc may comprise an elastomeric body. In these bushes can also be vulcanized, which are adapted to receive the connecting means, wherein the sockets are pairwise surrounded by Schiingenpaketen. In particular, in this embodiment, a significant advantage of the invention over the known prior art is that the damping characteristic variable in the tensile and shear direction of the flexible disc on the elastomeric body depending on the application, i. depending on the engine characteristics of the motorcycle drive adjust last. Since usually gearboxes of motorcycles are not synchronized, these have a pronounced "shift shock" (shift shock = sudden noise that occurs when gear teeth are not aligned with each other when changing gear) with each gear change, the with Help such a flexible disc can be reduced, whereby the switchability of the motorcycle transmission is significantly improved.

With respect to the torque output member may be provided that it comprises a rim of a driven wheel.

The invention further relates to a joint disk for a shock absorber arrangement with the abovementioned features, which is provided that it is arranged for the damped transmission of torque from the torque input member to the torque output member between the torque input member and the torque output member. A development of the invention provides that the flexible disc comprises an elastomeric body and has receiving openings for receiving connecting means.

Finally, the invention relates to a motorcycle drive having a shock absorber arrangement with the aforementioned features.

In the following, preferred embodiments of the invention will be explained with reference to the attached figures. It shows

1 is a sectional view of the shock absorber arrangement according to the invention with chain drive,

2 is a sectional view of FIG. 1 with shaft drive,

Fig. 3 is a sectional view of the shock absorber arrangement according to the invention, which is integrated in a coupling, and

Fig. 4 is a partially sectioned plan view of a flexible disc of the shock absorber arrangement according to the invention.

The shock absorber arrangement according to the invention shown in FIG. 1 is generally designated 10 and serves for the damped transmission of a torque M _K from a torque input element to a torque output element. The torque output member comprises in both shown embodiments of Figs. 1 and 2, a rim 14 and 114 of a driven wheel 12 and 112, which is rotatably mounted on an axle 16 and 116, respectively. The torque input element is designed in the embodiment shown in FIG. 1 as a chain drive and for this purpose comprises a sprocket 18, which is also rotatably mounted on the wheel axle 16.

At the gearbox output of a (not shown) gearbox, a chain with the translated drive torque is driven via a drive shaft (not shown). Teeth 20 of the driven sprocket 18 engage in the driving chain and transmit the driving force in the form of the torque MK via a flexible disc 32 on the rim 14 of the driven wheel 12th The illustrated sprocket 18 is formed in two parts in the present embodiment and comprises a chainring 22 with the teeth 20 and a sprocket carrier 24 to which the chainring 22 is attached. For this purpose, the chainring 22 is screwed, for example (as shown in Fig. 1) with screws 26 to the sprocket carrier 24. The bearing of the sprocket 18 is effected by means of a bearing 28 which is arranged between the sprocket carrier 24 and the axis 16. This may be a roller bearing, as is commonly used in the prior art. The same applies to the storage 30 of the wheel rim 14th

Between the rim 14 and the chainring 22, as already mentioned above, a flexible disc 32 is arranged, which allows a damped transmission of the torque M _κ . Such a flexible disk is in principle already known from the drive train of a motor vehicle and shown in a possible embodiment in Fig. 4. The sprocket carrier 24 has on its end facing the wheel rim 14 a recess 54 into which the flexible disc 32 is received with radial play. In this way, the sprocket 24 protects the flexible disc 32 from external influences, such as pollution.

In Fig. 4, a possible embodiment of such a flexible disc 32 is shown, which is formed in its cross-section substantially circular and over its circumference uniformly spaced receiving openings with sockets 34 _a and 34 _b . In the example shown, the joint disk 32 further includes six Schiingenpakete 32 _a , the two bushings 34 _a and 34 _b wrap around each other such that adjacent Schiingenpakete cross each other. The sockets 34 _a and 34 _b are arranged at equal intervals from one another around a central axis A and each provided with a collar 52. The entirety of the Schiingenpakete 32 _a and essentially also the bushes 34 _a and 34 _b and parts of each of the collar 52 are embedded in an elastic sheath 32 _b of vulcanized rubber, the so-called elastomer body 32 _b . This Schiingenpakete 32 _a are used to significantly increase the load capacity of the elastomer body 32 _b in the context of torque transmission and allow in this way the use of the flexible disc 32 at (usual for a motorcycle drive) torques of 200 Nm and more.

The flexible disk 32 may, as shown in Fig. 4, be formed of a single elastomeric body 32 _b , in which the bushings 34 _a and 34 _{b are} vulcanized. alternative However, it is also possible that the flexible disc 32 is formed from a multi-layer elastomer body, wherein the individual layers of the elastomer body have different damping properties. In the elastomeric body 32 _b are additionally, as stated above, Schiingenpakete 32 _a to increase the resilience of the elastomeric body embedded. With the help of different layers and / or by the choice of material of the Schiingenpakete 32 _a , an adaptation of the damping characteristic of the flexible disc 32 to the respective motorcycle drive and its specific properties, such as engine characteristics and liter capacity are possible. Furthermore, it is possible, by configuring the geometry of the joint disc 32, to further adjust its damping characteristic.

The bushings 34 _a and 34 _b are formed such that they can have an internal thread 36 (34 _a ) to receive a fastening screw 38 positively therein, or a smooth inner surface (34 _b ) to ensure a defined recording of a fastening screw 40 to be able to.

As shown in Fig. 1, the flexible disc is secured to the sprocket carrier via a screw connection. For this purpose, the sleeve 34 _{a has} an internal thread 36 into which the fastening screw 38 can be screwed. In addition, a bore 46 is mounted on the sprocket carrier 24, in which the screw 38 can be used. In the illustration shown in FIG. 1, the bore 46 is designed as a stepped bore, wherein the shoulder 48 of the stepped bore provides a bearing surface for the retractable screw head of the screw 38.

A spacer sleeve 50, which is arranged between the sprocket carrier 24 and the flexible disk 32, ensures a defined axial position (relative to the axis of rotation 16) of the flexible disk 32 with respect to the sprocket carrier 24. The same function is assumed by a collar 52 formed on each bush 34 _b is, this axially in one direction within the elastomer body 32 _{b of} the flexible disc 32 secures and the flexible disc 32 is axially supported on the rim 14. In this case, the joint disc 32 is also connected by a screw connection with the rim 14, wherein on the rim 14 a corresponding receiving opening 42 with internal thread 44 for connection to the fastening screw 40 is provided. The associated sleeve 34 _b has no internal thread in the illustrated embodiment, so that the screw 40 can be inserted through it. FIG. 2 shows an alternative embodiment of the invention in which, instead of a chain drive, a cardan drive drives the torque input element of the shock absorber arrangement 110 according to the invention. The same reference numerals are used as in Fig. 1, but preceded by the numeral "1".

5

The torque input member comprises in this embodiment, a toothed belt wheel 156 with teeth 122 which can engage in a toothed belt, not shown. A further essential difference from the arrangement shown in FIG. 1 is that the toothed belt wheel 156 is received to a large extent in a recess 158 with the articulated disk 132 connected by screws 138, which is attached to an end face of the rim 114 designed as a torque output member , This arrangement serves a compact design, which protects in particular the flexible disc 132 from external influences, such as contamination.

The mode of operation and further features of the shock absorption 110 correspond to those of the embodiment shown in FIG. 1.

FIG. 3 shows a further alternative embodiment of the invention, in which the shock absorber arrangement 210 is not located in the area of the secondary drive of a motor-driven two-wheeled vehicle, i. between the gearbox and the driven wheel of the two-wheeler, but in the region of the primary drive between the clutch and the gearbox of the motor-driven two-wheeler is arranged. 1, but preceded by the numeral "2." The torque input member in this embodiment includes a clutch core 262 of a clutch of the powered bicycle and, like the first and second embodiments, of the torque input member according to FIGS Fig. 1 and 2, receiving openings 242 for receiving corresponding fastening screws, which connect the coupling core 262 with the flexible disc 232-o the.

The clutch further includes a clutch basket 264, wherein the clutch core 262 and the clutch basket 264 can make a relative rotational movement to each other. The torque output element of the present embodiment wird5 formed by a coupling disc 272, the _κ on an output to the transmission of the motor-driven two-wheeler transmits the torque to be transmitted M, wherein the output includes an output shaft 266th The clutch core 262 is rotatably supported by bearings 268 relative to the output shaft and is supported by these bearings 268 relative to the output shaft 266. The coupling disk 272, however, is rotatably connected to the output shaft 266 and is rotatably supported via the bearing 270 on the clutch basket 264 from. For this purpose, the coupling disk 272 has a bearing seat 274 at its radial end.

The coupling disc 272 is used in particular for the rotational coupling of the output shaft 266 and the flexible disc 232. For this purpose, as in the first two embodiments of FIGS. 1 and 2, also receiving bores 246 for

Receiving corresponding fastening screws provided which connect the coupling disc 272 with the flexible disc 232.

In the flexible disc 232, as well as in the exemplary embodiments shown in FIGS. 1 and 2, bushes for threaded connection of the flexible disc 232 are received in the flexible disc 232 with the respective fastening screws, which are not shown in FIG. 3 for the sake of simplicity. In this way it is also possible in this embodiment, as in the embodiments of FIGS. 1 and 2, to ensure a defined position and accommodation of the respective fastening screws for connecting the flexible joint to the clutch core 262 or the coupling disk 272.

There may also be provided separate spacers 276 between the respective receiving openings 242 of the coupling core 262 and the receiving bores 246 of the coupling disc 272, which has a defined distance between the

Link disc 232 and the clutch core 262 and the coupling disc 272 allow. Alternatively, as shown in the embodiment of FIGS. 1 or 2, the bushings may also include a collar 252.

The torque to be transmitted is transmitted from the coupling via the clutch core 262 to the flexible disc 232 and from there to the coupling disc 272, which, by its rotationally fixed connection with the output shaft 266, drives it accordingly.

The mode of operation and the further features of the shock absorption 210 correspond to those of the embodiments shown in FIGS. 1 and 2. In summary, the use of a flexible joint in the shock absorber arrangement according to the invention results in several advantages. In particular, the fact that the flexible disc with respect to its damping characteristic by suitable dimensioning, choice of material, loop package design, etc., can be adapted to the particular application, leading to an improved over the prior art shock absorption. Furthermore, it is advantageous that the flexible disc is already prefabricated, and can be mounted as a part. As a result, the assembly compared to the mounting known shock absorbers is greatly facilitated, which has a corresponding cost reduction result. Further advantages result from a reduced weight compared to conventional shock absorbers.

Claims

claims

A two-wheeled damper assembly (10, 110) comprising a torque input member, a torque output member, and a jerk member disposed between the torque input member and the torque output member and configured to damply transmit a torque (MK) from the torque input member to the torque output member wherein the shock absorbing member comprises a flexible disc (32, 132) comprising an elastomer body, characterized in that in the elastomeric body of the flexible disc (32, 132) bushes (34a, 34b, 134a, 134b) are vulcanized, which are designed to the connecting means (38, 40, 138, 140) to receive, wherein the bushings (34a, 34b, 134a, 134b) are surrounded in pairs by Schiingenpaketen.

Second damper assembly (10, 110) according to claim 1, characterized in that the joint disc (32, 132) by at least a first connecting means (38) with the torque input member and by at least one second connecting means (40) with the torque output link bar bar is.

3. shock absorber arrangement (10, 110) according to claim 2, characterized in that on the joint disc (32, 132) respectively receiving openings (54, 154) for the at least first (38, 138) and the at least second connecting means (40, 140) are provided.

4. A damper assembly (10, 110) according to claim 2 or 3, characterized in that the connecting means (38, 40, 138, 140) comprise detachable connecting elements, such as screws, rivets or the like.

5. damper assembly (10, 110) according to any one of the preceding claims, characterized in that the torque input member is adapted to be driven by a chain drive.

A damper assembly (10, 110) according to claim 5, characterized in that the torque input member comprises a sprocket (18) connectable to a driven chain.

7. The shock absorber arrangement (10, 110) according to claim 1, characterized in that the torque input element is designed to be driven by a cardan drive.

A damper assembly (10, 110) according to claim 7, characterized in that the torque input member comprises a toothed hub (156) connectable to a gimbal actuator.

9. damper assembly (10, 110) according to any one of the preceding claims, i5 characterized in that the torque output member comprises a rim (14, 114) of a driven wheel (12, 112).

10. damper assembly (210) according to one of claims 1 to 4, characterized in that the torque input member comprises a component of a coupling 20 ment of the motor-driven bicycle.

11. damper assembly (210) according to one of claims 1 to 4 or 10, characterized in that the torque output member is connectable to a transmission input of a transmission of the motor-driven bicycle. 5

12. joint disc (32, 132) for a shock absorber arrangement (10, 110) according to one of claims 1 to 11, characterized in that the joint disc (32, 132) as a shock absorbing member for the damped transmission of torque from the torque input-O member to the Torque output member between the torque input member and the torque output member is arranged.

The flexible disc (32, 132) according to claim 12, characterized in that the flexible disc (32, 132) comprises an elastomer body 5 and has receiving openings (54, 154) for receiving connecting means (38, 40, 138, 140).

14. A motorcycle drive, comprising: a motor for generating a motor torque,

a gearbox which translates the engine torque, the transmission comprising a transmission input and a transmission output.

5 words,

- A primary drive connected to the transmission input for transmitting the engine torque to the transmission, and

a secondary drive connected to the transmission output for transmitting the translated engine torque from the transmission to a driven wheel (12, 112) of the motorcycle, the secondary drive comprising a shock absorber arrangement (10, 110) according to one of claims 1 to 11 for damping having the motorcycle drive occurring vibrations.

i5 15. Motorcycle drive, comprising:

a motor for generating a motor torque,

a coupling,

20 words,

a secondary drive connected to the transmission output for transmitting the translated engine torque from the transmission to a driven wheel (12, 112) of the motorcycle, the prime mover comprising a shock absorber assembly (210) according to any one of claims 10 or 11 for damping in the motorcycle drive having occurring vibrations.