Multi-layer pinion assembly and rear wheel assembly for bicycles with chain shifting mechanism

Abstract

A multi-level pinion assembly for the rear wheel assembly of a bicycle with a chain-driven shifter includes a multi-level pinion configuration and a helical plug configuration. The multi-level pinion configuration is adapted to couple with the drivetrain of the rear wheel assembly in a torque-transmitting manner and includes at least 11 pinions with different numbers of teeth. The multi-level pinion assembly is constructed such that, upon installation, at least two of the smallest pinions are axially secured to the drivetrain via the helical plug configuration. The helical plug configuration has a segment for receiving at least one of the at least two smallest pinions, wherein the segment is provided with an axially external stop section at one end region, and wherein the segment is assigned at least one external thread at its opposite end region, the helical plug configuration being secured by screwing the external thread into a corresponding internal thread. The external thread assigned to the segment has an outer diameter larger than the outer diameter of the segment in the region receiving at least one of the at least two smallest pinions.

Description

Technical Field

[0001] This invention relates to a multi-layer pinion assembly for a bicycle with a chain-driven shifting system, the multi-layer pinion assembly comprising a multi-layer pinion configuration and a coil plug configuration. The invention also relates to a rear wheel assembly for a bicycle with a chain-driven shifting system, the rear wheel assembly having a multi-layer pinion assembly. Background Technology

[0002] Rear wheel configurations for bicycles with chain-driven shifters typically include a multi-pinion configuration, which is coupled to the rear wheel hub via a drivetrain, or can be coupled to the rear wheel hub via a drivetrain. The pinions in the multi-pinion configuration are connected to the drivetrain in a torque-transmitting manner. To secure the pinions and prevent axial movement, a sealing ring is conventionally used. This sealing ring has external threads on one end section and a radially extending protrusion on the opposite end section. After the rear wheel assembly is installed, the external threads of the sealing ring engage with the internal threads of the drivetrain, causing this protrusion to abut against the outer surface of the smallest pinion. This sealing ring secures the pinions in the multi-pinion configuration in this way to prevent axial movement.

[0003] This drivetrain engages with the rear hub via a one-way clutch to transmit torque, enabling torque transmission in the direction of rotation (drive direction), while decoupling from the rear hub in the other direction via a one-way mechanism. In the assembled state, the rear hub is connected to the rear axle, which is then mounted on the corresponding fork ends of the bicycle frame at its opposite ends. Therefore, the bicycle frame defines the mounting width between its two fork ends and the inner spacing between these fork ends to allow all components to be secured to the rear hub, such as the wheel, drivetrain, multi-coil pinion configuration, hub caps, and other possible components for mounting the rear derailleur.

[0004] In recent years, chain-driven shifting systems have become increasingly sophisticated, featuring a single sprocket within the pedal crank area. This development has coincided with the widespread adoption of motor-assisted bicycles. However, this development is driven by the idea of ​​eliminating the heavy weight of multiple sprockets and corresponding front derailleurs. This development necessitates providing a sufficient number of gears on the rear multi-gear configuration (freewheel) to offer greater gear ratio range. However, the limited and largely standardized mounting widths for all components on the rear hub and the preset widths of commercially available chains prevent the simple addition of arbitrary numbers of pinions to the multi-gear configuration from meeting the growing demand for more gears and therefore more pinions. The available structural space (mounting width) conflicts with the width of conventional chains and the corresponding widths of individual pinions, serving as a limiting factor. Nevertheless, to improve gear ratios with a limited number of pinions, it is necessary to increase the range of gear ratios between the largest and smallest pinions. For both professional and amateur cyclists, having the smallest possible gear (the largest pinion) and the largest possible gear (the smallest pinion) is particularly important. This allows for comfortable riding up steep slopes while achieving greater speeds with the same cadence. The pinions in a multi-coil configuration must be matched accordingly. Large differences in transmission levels may occur between adjacent pinions, but this should generally be avoided.

[0005] The geometry of transmissions in traditional solutions limits the need to provide a small pinion for the largest possible gears. The pinion is conventionally fastened to the radial circumference of the transmission, thus its minimum inner diameter (root circle) is predetermined by the transmission's outer diameter. When using transmissions commonly found in the market, based on the transmission's geometry, a minimum pinion with 11 teeth can be mounted on the pinion configuration and axially secured by a sealing ring to prevent axial movement.

[0006] However, cycling still requires extremely small gears, that is, gears with 10 or fewer teeth. To meet this need, existing technologies employ new drivetrains that differ from standard drivetrains, which can be designed to accommodate gears with fewer than 11 teeth. However, compared to standard solutions, these specialized solutions are more expensive due to lower production volumes, and are often incompatible with traditional rear wheel components and commercially available drivetrains. Furthermore, these specialized solutions are difficult to bring to market.

[0007] Document EP 1 342 657 B1 discloses a transmission device specifically designed to accommodate a small pinion. This transmission device has a first tubular element that can be fastened to a bicycle wheel hub using a one-way mechanism. A second tubular element with a smaller diameter can be coupled to the axial outer end of the first tubular element. The second tubular element has an outer diameter smaller than the first tubular element and is capable of fastening and radially supporting a 10-tooth pinion on the second tubular element. In one embodiment, three pinions are shown being accommodated and radially supported on the second tubular element. To axially secure the pinion coupled to the transmission device, a closed ring with internal threads engages with the external threads of the second tubular element, such that the closed ring abuts against the outer surface of the smallest pinion.

[0008] Patent application publication DE 10 2017 004 853 A1 discloses another scheme using two pinions with inner diameters smaller than the outer diameter of the transmission device. The two smaller pinions are connected by a first connecting section and by another connecting section to the smallest pinion arranged on the transmission device. In one embodiment, the two smaller pinions are formed in a self-supporting manner. A locking element is provided to secure the pinions and prevent axial movement. This locking element includes an external thread that engages with the internal thread of the transmission device, a rod segment accommodating the two smaller pinions, and a radially extending protrusion. This locking element is adapted to accommodate the smaller pinions in such a way that the outer diameter of the rod segment is larger than the nominal diameter of the external thread, and the protrusion extends radially outward to abut against the smallest pinion and absorb the axial force exerted by this pinion. Summary of the Invention

[0009] The object of the present invention is to provide a multi-layer pinion assembly and a rear wheel assembly that provides an improved gear ratio in a simple manner and can also be coupled with conventional transmission types.

[0010] The solution of the present invention to achieve the above-mentioned objective is a multi-layer pinion assembly for the rear wheel assembly of a bicycle with a chain-driven shift mechanism, as described below. Furthermore, the solution of the present invention to achieve the above-mentioned objective is a rear wheel assembly for a bicycle with a chain-driven shift mechanism, as described below.

[0011] Other embodiments of the present invention are described in the dependent claims.

[0012] According to a first aspect of the invention, a multi-layer pinion assembly for the rear wheel assembly of a bicycle with a chain-driven shift mechanism includes a multi-layer pinion configuration and a helical plug configuration. The multi-layer pinion configuration is adapted to couple with the drivetrain of the rear wheel assembly in a torque-transmitting manner and includes at least 11 pinions with different numbers of teeth. The multi-layer pinion assembly is constructed such that, after the drivetrain and the multi-layer pinion assembly are installed, at least two of the smallest pinions are axially fixed to the drivetrain via the helical plug configuration. The helical plug configuration has a segment for receiving at least one of the at least two smallest pinions. The segment has an axially outward stop section at one end region. Furthermore, the segment has at least one external thread at its opposite end region, through which the helical plug configuration can be screwed into a corresponding internal thread to secure the helical plug configuration. According to the solution of the invention, the external thread assigned to the segment has an outer diameter larger than the outer diameter of the segment in the region receiving at least one of the at least two smallest pinions.

[0013] According to the solution of the invention, at least two of the smallest pinions, i.e., at least two of the pinions with the fewest teeth, are fixed by a helical plug configuration or can be fixed to the remaining pinions of a multi-layer pinion configuration. Thus, the multi-layer pinion configuration can include more pinions compared to conventional fastening of pinions to the outer circumferential surface of the transmission device. Furthermore, the solution of the invention overcomes the limitation on the inner diameter of the smallest pinion caused by the outer circumference of the transmission device for at least one pinion housed on a segment of the helical plug configuration. In this regard, the segment has an outer diameter smaller than the outer diameter of the transmission device. An external thread assigned to the segment is used to fix the helical plug configuration to the transmission device or the multi-layer pinion configuration; this external thread can engage with the internal thread of the transmission device and is preferably constructed as a ring element. That is, the external thread assigned to the segment serves as a connection between the segment and the internal thread of the transmission device. Thus, the internal thread of the transmission device can be used to fix the helical plug configuration to the transmission device. Therefore, the gear ratio of the chain-driven shifting device can be increased by means of the solution of the invention.

[0014] In one embodiment of the invention, at least one of the two smallest pinions housed on the rod segment can be formed in a self-supporting manner. That is, a radial distance may exist between the rod segment and at least one pinion housed on the rod segment, or between all the pinions housed on the rod segment.

[0015] In this application, when referring to the smallest pinion, it means the pinion with the fewest teeth. When referring to multiple smallest pinions, it means the adjacent pinions with the fewest teeth. In one embodiment of the invention, the smallest pinion has, for example, 10 teeth. However, the smallest pinion can also have 9 or 8 teeth. With the largest pinion remaining constant, a smaller number of teeth allows for a larger chain shifting ratio that can be achieved by means of a multi-pinion configuration. The minimum number of teeth is limited by the minimum possible inner diameter of the smallest pinion associated with the applied bicycle chain. The multi-pinion assembly of the present invention can include multi-pinion configurations with 12 pinions or even 13 or more pinions. The largest pinion can have at least 48 teeth, particularly 50, 51, or 52 teeth.

[0016] The axially outward stop section is adapted to absorb forces acting axially outward on the screw-type configuration. The axially outward direction is defined as the direction extending from the bicycle's center plane toward the fork end closer to the multi-pinion configuration, which is orthogonal to the rotation axis of the multi-pinion configuration and passes through the center point between two opposing fork ends of the bicycle frame. The axially inward direction is opposite to the axially outward direction. The radially outward direction is orthogonal to the rotation axis of the multi-pinion configuration and extends away from this rotation axis. The radially inward direction is opposite to the radially outward direction.

[0017] An internal thread, which can be used to engage with the external thread of a rod segment to secure the helical plug configuration, can be arranged on the transmission device. In an alternative embodiment, this internal thread can be arranged in the radially inner region of a multi-layered pinion configuration. The meshing threads are designed to provide sufficient overlap to transmit the forces generated during operation.

[0018] According to an improved embodiment of the invention, at least one pinion, along with a connecting section assigned to the pinion, is accommodated on the rod segment. According to an alternative embodiment, two pinions and the connecting section connecting the two pinions together can be accommodated on the rod segment. For this purpose, the length from the inner surface of the external thread assigned to the rod segment to the inner surface of the axially outer stop section can be 3.2 mm to 5.0 mm. The connecting section can be a flange section or a retaining bolt. The connecting section can be integrally formed with the adjacent pinion or attached to the pinion.

[0019] Generally speaking, the axial length of the spiral plug configuration can be less than the distance between four or three adjacent pinions, which is measured from the inner side of the largest of the four or three pinions to the outer side of the smallest of the four or three pinions.

[0020] According to an improved embodiment of the invention, the outer diameter of the axially outer stop section is smaller than, exactly equal to, or larger than the outer diameter of the external thread allocated to the rod section. Of course, a smaller embodiment of the stop section saves space, but should still be stable enough to absorb the axial forces generated during operation. The outer diameter of the axially outer stop section can also be larger than the outer diameter of the rod section. This creates an undercut on the outer periphery of the plug configuration. For the purposes of this invention, an undercut refers to the existence of an area whose outer peripheral surface is restricted by two axial stops with larger diameters. The undercut configuration allows the plug configuration to simultaneously provide a sufficiently large external thread, a rod region with a diameter smaller than the outer diameter of the transmission, and to axially fix the pinion housed on the rod section in a highly space-saving embodiment.

[0021] According to an improved embodiment of the invention, the external thread assigned to the rod segment is integrally formed on or together with the rod segment. Similarly, the axially outer stop segment can also be integrally formed on or together with the rod segment. After at least one of the at least two smallest pinions has been accommodated within or on the rod region, at least one of the external thread and the stop segment can be formed during the installation of the multi-layer pinion assembly. Forming can be carried out by means of laser welding, friction welding, brazing, bonding, pressing, pinning, and / or folding. That is, the plug configuration can have at least one engagement point, for example, formed by means of the aforementioned forming processes. The engagement point can be orthogonal or parallel to the rotation axis of the multi-layer pinion configuration. Alternatively, additive manufacturing processes, such as the 3D printing process of the present invention, can be employed.

[0022] Alternatively, the axially outer stop section and / or the external thread assigned to the rod segment can be integrally manufactured with or modified from the rod segment. With modification, the diameter of the axially outer stop section and / or the external thread is increased relative to the rod segment. The modified external thread assigned to the rod segment and / or the axially outer stop section has an outer diameter greater than the outer diameter of the rod segment in the region accommodating at least two minimum pinions.

[0023] Therefore, in the first step, the axially outer stop section is manufactured integrally with the rod segment and with the same outer diameter. In the second step, the axially outer stop section and / or the threaded section are modified to increase its outer diameter while decreasing its axial length. The material to be modified is extruded from the axial direction to the radial direction. For example, the modification can be implemented by crimping. This also allows for the manufacture of the external threads assigned to the rod segment at a lower cost. After modification, in the third step, only the increased outer diameter of the external threads assigned to the rod segment needs to be fitted with external threads. When manufacturing the axially outer stop section and / or the external threads assigned to the rod segment, at least two minimum pinions are pushed onto the rod segment before the modification is implemented. After modification, at least two minimum pinions are axially secured to the rod segment by the increased outer diameter of the axially outer stop section and / or the external threads assigned to the rod segment. In this embodiment, advantageously, neither additional components nor engagement points are required.

[0024] In another alternative technical solution, the axial outer stop section can be formed by multiple clips distributed on the outer periphery of the spiral plug configuration, wherein the rod segment and / or the clips have a certain degree of elasticity, allowing a pinion or multiple pinion configurations with an inner diameter smaller than the outer diameter of the clip to be pushed onto the clips, thereby accommodating the pinion or multiple pinion configurations within the area of ​​the rod segment. When using the clips, the spiral plug configuration can be integrally formed before installing the multi-layer pinion assembly. This simplifies the installation process of the multi-layer pinion assembly.

[0025] In another alternative embodiment of the invention, the axially outer stop section can be separated from the rod segment and constructed as a locking element, which can be connected to the rod segment, for example, by engaging a groove constructed within the end region of the rod segment. The locking element can be an annular element, such as a snap ring. When installing the multi-layer pinion assembly, all the pinions of the multi-layer pinion configuration can be accommodated within the region of the rod segment first, and then the locking element can be inserted into the groove to axially fix the multi-layer pinion configuration.

[0026] Alternatively, the larger diameter threaded section and / or stop section of the screw plug can be constructed as segments. This segmented construction of the screw plug and at least the smallest pinion allows for a bayonet-like connection between the smallest pinion and the screw plug. The two components are joined together by inserting them together and twisting them relative to each other.

[0027] Similarly, the aforementioned technical solutions for the axial outer stop section and the external thread assigned to the rod section can be combined. For example, one axial end of the screw plug can be manufactured by a forming process, and the other axial end can be manufactured by modification. Likewise, the mentioned technical solutions can be combined with the embodiments described below, such as the embodiment of the two-part screw plug. The key to all combinations is that the outer diameter of the external thread assigned to the rod section is larger than the outer diameter of the rod section in the region accommodating at least one of the two smallest pinions.

[0028] Another embodiment of the invention relates to a two-part screw plug configuration comprising first and second components. The two components are separable from each other. In one embodiment, the external thread assigned to a rod segment is separable from that rod segment. Possible connecting members include screw connectors, plug connectors, snap-fit ​​mechanisms, and other separable connecting members.

[0029] In one improved embodiment of the invention, the first component may have a first tool interface, and the second component may have a second tool interface. The tool interfaces may be arranged radially inward on the inner circumferential surface of the first or second component. These two tool interfaces may be identical or different, allowing the same or two different tools to engage. This allows the two components to be processed independently using corresponding tools. For example, one component can be connected to the transmission during installation, and then the two components can be connected together. Alternatively, the two components can be connected together first, and then both components can be connected to the transmission together. Of course, the components can be removed from the transmission in the same manner. Advantageously, the tool interfaces enable the two components to be installed or removed from the transmission without damage, provided that the pinions in the multi-layered pinion configuration are not coupled to the transmission in a self-supporting manner.

[0030] The external thread assigned to the rod segment can be surrounded by a first component, and the axially outer stop segment can be surrounded by a second component. The first and second components can, for example, be screwed together. This two-part screw plug configuration simplifies the installation of the multi-layer pinion assembly because it allows the two components to be connected using simple mechanical tools.

[0031] For example, flywheel tools with an outer diameter greater than 22 mm, as known in the prior art, can be inserted into tool interfaces configured with two-piece or one-piece screw plugs in a manner that transmits torque.

[0032] Specifically, the first component may have a first connecting thread adapted to engage with a complementary second connecting thread of the second component. The connecting thread may be located in various positions, such as between a rod segment and an external thread assigned to that rod segment, within a region of the rod segment, or between the rod segment and a stop segment. The connecting thread of the first component may be an external thread, and the complementary connecting thread of the second component may be an internal thread. Alternatively, the first connecting thread of the first component may be an internal thread, and the complementary second connecting thread of the second component may be an external thread.

[0033] Regardless of whether the screw plug configuration is built as a single piece or a two-piece design, it is suitable for engaging the internal thread with the external thread assigned to the rod segment. The internal thread can be arranged on the drivetrain, with multiple pinions arranged on the outer circumferential surface of the drivetrain. When the screw plug configuration is engaged or screwed into the drivetrain, at least one pinion housed in the screw plug configuration has an arbitrary angular position relative to the pinions arranged on the outer circumferential surface of the multiple pinions. However, in higher-priced bicycle shifting mechanisms, it is precisely necessary for the teeth on the installed pinions to have a predetermined angular positioning relative to each other to ensure that the shifting process of the bicycle chain between the pinions is flexible and almost imperceptible to the cyclist, thereby ensuring the most continuous torque transmission possible.

[0034] Generally, especially in products not mass-produced, threaded connections make it impossible to achieve precise angular positioning between screwed components. Furthermore, in bicycle technology, components are sometimes separated for maintenance or repair purposes, further increasing the difficulty of re-establishing precise angular positioning between threaded connections after reassembly. Therefore, according to an improvement of the invention, in the threaded connection between the screw plug configuration and the transmission, the angular position of the smallest pinion or the two smallest pinions housed on the rod segment can be set independently of the thread position. This indicates that the smallest pinion or the two smallest pinions can rotate relative to the rod segment of the screw plug configuration. For example, the smallest pinion, preferably at least two smallest pinions, can be determined by a suitable fixing member before, during, or after the screw plug configuration is screwed into the transmission, by means of a suitable fixing member. The fixing member can, for example, couple the pinion housed in the screw plug configuration to other pinions of a multi-layer pinion assembly in an anti-rotation manner. The smallest pinion coupled to the transmission and the plug configuration accommodate adjacent second pinions, for example, each having a toothed and slotted flange that can mesh with each other and determine the desired angular position between the pinions.

[0035] To ensure relative movement of at least one pinion housed on the lever segment, in one embodiment of the invention, the outer diameter of the external thread assigned to the lever segment is larger than the inner diameter of the smallest pinion in a multi-layered pinion configuration. The lever segment is adapted to house one or two pinions with an inner diameter of 27.0 mm to 28.2 mm, preferably 27.2 + / - 0.2 mm. Alternatively, the lever segment is adapted to house a pinion with an inner diameter of approximately 24 mm. The lever segment may also include a step, such that the lever segment is adapted to house two pinions with a given larger or smaller inner diameter. The pinions with the given inner diameter are adapted to have 10 or 9 teeth, the distance between which is adapted to engage with a bicycle chain.

[0036] The two smallest pinions in a multi-layered pinion configuration can be integrally connected after installation. This allows the angular positioning between the two smallest pinions to be determined. The integral connection can be achieved by integrally molding the two smallest pinions or by molding the pinions onto each other; for this purpose, the aforementioned integral molding process can be applied. Alternatively, additive manufacturing processes, such as the 3D printing process of this invention, can be used. Preferably, a connecting section is arranged between the pinions. The joint point produced during integral molding can be parallel or orthogonal to the rotation axis of the multi-layered pinion configuration and can be arranged adjacent to the connecting section that connects the two pinions together. In an improved embodiment of the invention, the three smallest pinions of the multi-layered pinion configuration can also be integrally connected after installation. The joint point can be located within the region of the rod segment, between the rod segment and the corresponding external thread, and / or between the rod segment and the axially outer stop section.

[0037] In an alternative embodiment of the multi-pinion configuration, two or three smallest pinions can be detachably connected and have meshing teeth and corresponding slots. The pinions are connected in an anti-rotation manner with the teeth meshing with the corresponding slots. After installation, the detachably connected pinions are axially secured to the transmission device by, for example, a screw plug configuration.

[0038] To mount the plug configuration on, for example, a transmission device, the plug configuration may have a radially inner tool port into which a tool engages in a torque-transmitting manner. The inner diameter of the tool port may be from 22.6 mm to 23.6 mm, preferably 21.6 + 0.4 / - 0.6 mm.

[0039] To provide a multi-layer pinion assembly with a short axial length, the smallest pinion in the multi-layer pinion configuration may have radial and axial grooves on its axially outer end side, the grooves being constructed such that an axially outer stop section can engage with them. If the axially outer stop section and the radial and axial grooves engage together after the multi-layer pinion assembly is assembled, the outer surface of the smallest pinion may be positioned axially further outward than the end side of the axially outer stop section. Alternatively, the outer surface of the smallest pinion may be aligned with the end side of the axially outer stop section. According to another alternative, the axially outer stop section may extend axially outward from the outer surface of the smallest pinion by less than a maximum of 0.5 mm, preferably less than 0.2 mm. Of course, the foregoing description also applies to all embodiments of the axially outer stop section.

[0040] In an improved embodiment of the invention, an intermediate element, such as a metal plate ring or a plastic ring, can be embedded in the region of the groove between the smallest pinion and the screw plug configuration to reduce friction at the contact point.

[0041] In another embodiment of the invention, the screw plug configuration can be implemented as a single unit and provided as a 3D-printed part having at least one pinion housed on a rod segment. This allows the screw plug configuration to be integrally manufactured, and the pinions can be printed radially outside the screw plug configuration such that they are housed within the region of the rod segment. In other words, the screw plug configuration and the pinions it houses can be integrally manufactured. Of course, other pinions in a multi-layered pinion configuration can also be manufactured as 3D-printed parts.

[0042] According to another aspect of the invention, a rear wheel assembly for a bicycle with a chain-driven shift mechanism includes a rear wheel hub that can be arranged between two opposing frame sections of the bicycle frame, a drivetrain rotatably coupled to the rear wheel hub, and a multi-layer pinion assembly constructed according to the foregoing embodiment. The multi-layer pinion configuration of the multi-layer pinion assembly is anti-rotatably coupled to the drivetrain or can be anti-rotatably coupled to the drivetrain.

[0043] Transmission devices coupled to or capable of being coupled to multi-layer pinion assemblies can refer to standard transmission devices known in the prior art, which are marketed under the name... The transmission device, or HG transmission device for short, is available for sale. In other words, the multi-layer pinion assembly of this invention can be used with conventional transmission devices, which are readily available at a lower cost due to their large production volume and widespread use.

[0044] The following describes a feasible technical solution for the transmission device. The transmission device may have a transmission element profile on a first transmission device region of its radially outer surface, the transmission element profile being arranged along a first axial transmission device length extending axially outward from the transmission device stop. The length of the first axial transmission device is less than the length of the second axial transmission device extending from the transmission device stop to the axially outer end side of the transmission device. The transmission device may not have a transmission element profile on a second transmission device region of its radially outer surface, the second transmission device region being adjacent to the axially outer end side of the transmission device. Furthermore, the transmission device may have an opening extending radially outward from the central axis of the transmission device and axially inward from the axially outer end side of the transmission device, wherein the opening may have internal threads on its radially inner surface.

[0045] The characteristic dimensions of the transmission device are as follows: The length of the first axial transmission device, from the transmission device stop to the end of the transmission component profile, can be greater than 32.9 mm, preferably 33.2 + / - 0.4 mm. The length of the second axial transmission device, from the transmission device stop to the outer axial end of the transmission device, can be greater than 34.2 mm, preferably 34.9 + / 0.3 mm. The outer diameter of the first transmission device within the first transmission device region along the length of the first axial transmission device can be greater than 34.2 mm, preferably 34.5 + / - 0.2 mm. The outer diameter of the second transmission device within the second transmission device region adjacent to the outer axial end of the transmission device can be greater than 31.4 mm, preferably 32.1 + 0.4 / - 0.2 mm. The nominal diameter of the first transmission device axially adjacent to its outer axial end can be greater than 29.8 mm, preferably 30.6 + / - 0.2 mm.

[0046] Furthermore, the multi-layer pinion assembly can be configured such that, after installation, the first axial distance from the transmission stop to the outer surface of the smallest pinion is greater than 38.0 mm, preferably greater than 39.1 mm, and more preferably 39.9 + / - 0.2 mm. As a supplement or alternative, the second axial distance from the outer end of the transmission to the outer surface of the smallest pinion is greater than 4.0 mm, preferably 5.0 + / - 0.2 mm.

[0047] With the help of the helical plug configuration of the present invention, the mounting width available for the multi-layer pinion assembly can be utilized particularly advantageously when applying a multi-layer pinion configuration with the largest possible number of teeth. This advantageous space utilization is embodied in the first and second space utilization factors defined below, which relate the dimensions of the transmission to the corresponding dimensions produced by the helical plug configuration mounted on the transmission and the at least one pinion housed in the helical plug configuration. The available mounting width for all components to be fastened to the rear wheel hub is at least 142 mm. The mounting width refers to the distance from the outer side of the left wheel hub end cap adjacent to the frame section to the outer side of the right wheel hub end cap adjacent to the frame section.

[0048] The first space utilization coefficient, derived from the ratio of the length of the second transmission device to the second distance, can be in the range of 5 to 10. The second space utilization coefficient, derived from the ratio of the length of the first transmission device to the second distance, can be in the range of 5 to 10.

[0049] The present invention also relates to a method for installing a rear wheel assembly. This method may include the following steps: connecting at least two pinions with the fewest teeth in a multi-layer pinion configuration together; connecting the at least two connected pinions to a auger such that the at least two pinions are supported in a manner rotatable about the central axis of the auger; fastening the auger to the transmission by engaging the external thread of the auger with the internal thread of the transmission; aligning the two connected pinions with the pinion with the largest number of teeth connected to the transmission; and fixing the two aligned and connected pinions to the pinion connected to the transmission by a fastening member.

[0050] All the features of the multi-layer pinion assembly and rear wheel assembly in the foregoing aspects and embodiments can be combined. Attached Figure Description

[0051] The exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Wherein:

[0052] Figure 1 A perspective view of a rear wheel assembly arranged between two frame sections and a rear shift mechanism arranged on one of these frame sections, according to an embodiment of the present invention.

[0053] Figure 2a -b is a corresponding cross-sectional view of a rear wheel assembly according to an embodiment of the present invention, the rear wheel assembly being fastened to a rear wheel hub arranged between two frame sections;

[0054] Figure 3 This is a cross-sectional view of the rear wheel assembly fastened to the frame, showing... Figure 2a A magnified portion of the multi-layered pinion assembly of -b;

[0055] Figure 4a -b is Figure 3 Rear view of the rear wheel assembly ( Figure 4a ) and side view ( Figure 4b );

[0056] Figure 5 for Figure 3 The helical plug configuration of the multi-layer pinion assembly and the cross-section of the pinions arranged on the multi-layer pinion assembly;

[0057] Figure 6 A cross-sectional view of the helical plug configuration of a multi-layer pinion assembly according to an embodiment of the present invention, and an explanation of the engagement point.

[0058] Figure 7a -e is a cross-sectional view of the multi-layer pinion configuration, along with a description of the engagement points;

[0059] Figure 8a -c represents the rear wheel assembly from different perspectives, where the smallest pinion in the multi-layer pinion configuration meshes with the bicycle chain;

[0060] Figure 9a -c is a cross-sectional view of a multi-layer pinion assembly with a spiral plug configuration according to another embodiment of the present invention;

[0061] Figure 10a -b is a cross-sectional view of a multi-layer pinion assembly with a spiral plug configuration according to another embodiment of the present invention. Figure 10a ) and side view ( Figure 10b );

[0062] Figure 11a -b and 12a-b are cross-sectional views of the rear wheel assembly in a certain state, in which the multi-layer pinion assembly and the transmission device in the embodiment of the present invention are arranged close to each other, but are not coupled to each other;

[0063] Figure 13a -d, 14a-d, and 15 are the first and second components of a two-part spiral plug configuration for a multi-layer pinion assembly according to another embodiment of the present invention;

[0064] Figure 16a -b is a cross-sectional view of a tool that engages with the second component of the split-type screw plug of the multi-layer pinion assembly according to the embodiment shown in Figures 13-15 of the present invention. Figure 16a ) and side view ( Figure 16b );

[0065] Figure 17 Cross-sectional view of a tool for engaging with a split spiral plug configuration of a multi-layer pinion assembly according to the embodiment shown in Figures 13-15 of the present invention;

[0066] Figure 18a -c is a cross-sectional view of the transmission device. Figure 18a ), front view ( Figure 18b ) and perspective ( Figure 18c );

[0067] Figure 19a -b is a view of a segmented spiral plug configuration and pinion according to another embodiment of the present invention;

[0068] Figure 20 Another embodiment of the spiral plug configuration with segmented threads and pinion;

[0069] Figure 21a -b is a view of a modified screw plug according to another embodiment. Detailed Implementation

[0070] Figure 1 The diagram shows a perspective view of the rear wheel assembly 3 arranged between two frame sections 1 and 2, and a rear shift mechanism 4 arranged on one of the frame sections 1 and engaging with the bicycle chain 5. A B-joint 6 for securing the rear shift mechanism 4 loops around the fork end 8 of frame section 1 and is secured to this fork end by means of a connector 7, which is received in both the fork end 8 and the fork end of the other frame section 2. A P-joint 9 is rotatably mounted on the B-joint 6, wherein deflection of the P-joint 9 changes at least its axial position relative to the B-joint 6.

[0071] The rear wheel assembly 3 includes a multi-layer pinion assembly 10, which further includes a multi-layer pinion configuration 12 and a spiral plug configuration 14. For clarity, Figure 1 The pinions of the multi-layered pinion configuration 12 are shown schematically only by indicating the corresponding outer periphery of the pinion. Figure 1 In this configuration, the bicycle chain 5, driven by a front drive pinion (not shown), engages with the pinions of the multi-layer pinion configuration 12 and the two chain rollers 15 of the rear shift mechanism 4. Naturally, the deflection of the rear shift mechanism 4, particularly the P-knuckle 9, alters the position of the bicycle chain 5 relative to the pinions, allowing the bicycle chain 5 to engage with the next adjacent pinion or the pinion after that.

[0072] Figure 2a -b shows a multi-level pinion assembly 10 including a multi-level pinion configuration 12 and a spiral plug configuration 14. The multi-level pinion assembly 10 is connected to a transmission 16 and together with this transmission forms a rear wheel assembly 3. The rear wheel assembly 3 is arranged on a rear wheel hub 11, which extends between two opposing frame sections 1 and 2 and is secured or can be secured to the frame sections 1 and 2 by means of a rear axle 19. A shift lug 22 is arranged between the frame section 1 and the rear wheel assembly 3, which is used to mount the rear shift mechanism 4 and through which the rear wheel hub 11 passes.

[0073] The multi-layer pinion configuration 12 shown has twelve pinions R1-R12. Figure 2a A multi-layer pinion configuration 12 is shown, in which the four largest pinions R1-R4 are connected to a star gear 13, thereby transmitting torque to the transmission 16 via the star gear 13. In this space-saving embodiment, the four largest pinions are radially spaced from the transmission 16. Six medium pinions R4-R9 are axially spaced from each other with respect to the spacer section 17 and are directly engaged with the transmission 16 in a torque-transmitting manner. The two smallest pinions R11, R12 are connected to the plug configuration 14 via a third smallest pinion R10 in a torque-transmitting manner.

[0074] Figure 2bAn alternative multi-layer pinion configuration 12 is shown, in which the pinions are connected by pins / bolts 19. Only the largest pinion R1 is connected to the transmission 16 in a torque-transmitting manner, that is, extending radially to the transmission 16. The remaining pinions R2-R12 are radially spaced from the transmission 16. The three smallest pinions are integrally formed, for example, welded together, and are connected to the transmission 16 in a torque-transmitting manner via a third smallest pinion R10, and are axially fixed by a screw plug configuration 14.

[0075] also, Figure 2a -b indicates the mounting width D0, which is at least 142 mm, that can be used to fasten the component to the rear wheel hub 11. The mounting width refers to the distance from the outer side of the left wheel hub end cap 23 adjacent to the frame section 2 to the outer side of the right wheel hub end cap 25 adjacent to the frame section 1.

[0076] In both alternative embodiments of the multi-pinion configuration, the third smallest pinion R10 is arranged on the outer peripheral surface 24 of the transmission 16 and radially supported on the transmission 16. Furthermore, the third smallest pinion R10 engages with the transmission member profile 26 arranged on the outer peripheral surface 24 of the transmission 16, thereby enabling the third smallest pinion R10 to be anti-rotationally coupled to the transmission 16. The two smallest pinions R11 and R12 are at least partially arranged axially outside the transmission 16 and adjacent to the third smallest pinion R10. Figure 3 An enlarged view is shown of the three smallest pinions R10-R12 mounted on the transmission device 16 and axially fixed by the screw plug configuration 14.

[0077] like Figure 4a As shown, the axial direction used in this application refers to the bicycle's center plane 30 and frame sections 1 and 2. The inward direction of the axial direction is A. i The direction A is defined as the direction from one of the frame sections 1 and 2 toward the bicycle's center plane 30, while the axial direction is outward. a It is defined as the direction from the center plane of the bicycle toward frame segment 1. Therefore, the axial direction R i and R a They are opposite to each other. And if we mention the radially outward direction R... a This refers to the direction that is orthogonal to and away from the rotation axis 32 of the multi-layer pinion configuration 12. The radially inward direction R i Radial outward direction R a Conversely, the direction is towards the rotation axis 32 of the multi-layer pinion configuration 12. The rotation axis 32 of the multi-layer pinion configuration 12 is parallel to the rear wheel hub and coincides with the rotation axis or longitudinal axis of the rear wheel hub. Figure 3 The directions mentioned are shown.

[0078] Figure 3 The rear wheel assembly 3 shown is arranged on the frame section 1. Figure 4a Views after the middle and in Figure 4b The image is shown in a side view. From Figure 4b It can be best seen that the rear wheel assembly 3 is mounted on the frame fork end 8 of the frame section 1 of the bicycle frame.

[0079] The transmission device 16 has an opening with an internal thread 34 on its axial outer side after installation. The spiral plug configuration 14 can be engaged with the internal thread 34.

[0080] Figure 5 A detailed view of a plug configuration 14 according to an embodiment of the present invention and at least two smallest pinions R11, R12 housed thereon is shown. The at least two smallest pinions R11, R12 are housed in a rod segment 36. The rod segment 36 has an axially outward stop section 38 disposed on its end region. An external thread 40, assigned to the rod segment, is arranged on the opposite end region of the rod segment 36. The external thread 40 of the plug configuration can engage with the internal thread 34 of the transmission device 16. In this case, the external thread 40 serves as an annular element with an intermediate diameter between the transmission device 16 and the rod segment 36. Therefore, after the rear wheel assembly 3 is installed, the external thread is axially arranged inside the internal thread 34 of the transmission device 16 and adjacent to the rod segment 36 of the plug configuration 14. The outer diameter d1 of the stop section 38 and the outer diameter d2 of the external thread 40 are larger than the outer diameter d3 of the rod segment 36 in the region suitable for accommodating at least one of the at least two smallest pinions R11, R12. This results in a spiral plug configuration 14 with undercut.

[0081] The outer diameter d2 of the external thread 40 assigned to the rod segment can be from 30.1 mm to 30.6 mm, preferably 30.5 + / - 0.2 mm. The outer diameter d3 of the rod segment 36 in the region accommodating at least one of the two smallest pinions R11, R12 can be from 26.0 mm to 27.5 mm, preferably 26.8 + / - 0.2 mm or alternatively about 24 mm. In an embodiment not shown, the rod segment may include a step, thus the rod segment having a corresponding region with a given alternative inner diameter.

[0082] The axial length L1 of the undercut between the inner surface 42 of the external thread 40 assigned to the rod segment and the inner surface 44 of the stop section 38 is 3.2 mm to 5.0 mm. The axial length L2 of the plug configuration 14 is, for example, 7.5 mm to 10.3 mm, preferably 9.0 + / - 0.2 mm. To ensure sufficient axial prestress for load transmission in the multi-layer pinion configuration, the axial length L3 of the external thread 40 assigned to the rod segment can be between 2.5 mm and 3.5 mm, preferably 3.0 + / - 0.2 mm.

[0083] exist Figure 5 In the illustrated embodiment, the rod segment 36 houses the two smallest pinions R11, R12 of the multi-layer pinion configuration 12. The at least two smallest pinions R11, R12 are radially self-supporting, meaning there is a radial distance between the rod segment 36 and the two smallest pinions R11, R12. This radially self-supporting design of the at least two smallest pinions R11, R12 is achieved by interconnecting these pinions, for example, through a joining process or a snap-fit ​​mechanism, and connecting them to an adjacent larger pinion R10. The smallest pinion R10 coupled to the transmission and the adjacent second pinion R11 housed in the screw-type configuration each have, for example, a toothed and slotted flange that can mesh with each other and define the desired angular position between the pinions.

[0084] The smallest pinion R12 abuts against the stop section 38 with its axially outward region, thereby axially securing the multi-layered pinion configuration 12 after the rear wheel assembly 3 is installed. For a particularly space-saving implementation, the smallest pinion R12 has a radially inward and axially outward groove 41 into which the stop section 38 engages. Figure 5 As shown, this engagement can, for example, allow the stop section 38 to be at least partially accommodated in the recess 41. In an alternative embodiment, the outer surface 46 of the smallest pinion R12 can coincide with the end face 48 of the stop section 38.

[0085] To install the rear wheel assembly 3, the screw plug configuration 14 is screwed into the internal thread 34 of the transmission device 16 with its external thread 40. The required rotational force can be transmitted to the screw plug configuration 14 using a tool. For this purpose, the screw plug configuration 14 has a tool interface 50 on its inner circumferential surface, into which a tool can be engaged in a torque-transmitting manner.

[0086] The inner circumferential surface of the plug configuration 14 determines the inner diameter d4 of the rod segment 36, which is 23.8 mm to 25.0 mm, preferably 24.0 + / - 0.2 mm. The inner diameter d5 of the smallest pinion R12 housed on the plug configuration 14 is greater than the outer diameter d3 of the rod segment 36, allowing the plug configuration 14 to rotate relative to the pinion housed thereon.

[0087] In order to accommodate at least one of the two smallest pinions R11, R12 within the undercut region of the screw plug configuration 14, according to one embodiment, the screw plug configuration is provided with an engagement point. Figure 6Possible engagement points 52, 54, and 56 of the plug configuration 14 are shown. These engagement points are located in the region between the rod segment 36 and the axially outer stop segment 38, between the rod segment 36 and the corresponding external thread 40, and / or within the region of the rod segment 36. The plug configuration 14 has at least one of these engagement points 52, 54, and 56. When installing the multi-layer pinion assembly 10, the pinions R11 and R12 may be accommodated within the region of the rod segment 36 before the plug configuration 14 is attached to at least one of the engagement points 52, 54, and 56.

[0088] In one embodiment, pinions R10, R11, and R12 can be connected by means of engagement point 58. Figure 7a -e indicates the possible engagement point 58 between the three smallest pinions R10, R11, and R12. Engagement point 58 is adjacent to a connecting section 60, which is arranged between two adjacent pinions and defines the distance between the pinions. The smallest pinion R12 is, for example, attached to the connecting section 60 between the smallest and the second smallest pinions R12 and R11, see [reference needed]. Figure 7a Alternatively, the second smallest pinion R11 can be integrally formed with two opposite connecting sections 60, and the smallest pinion R12 can be attached to one of the connecting sections 60, see [link to relevant documentation]. Figure 7c Alternatively, the smallest pinion R12 can be integrally formed with the connecting section 60, and the second smallest pinion R11 can be attached to the connecting section 60 of the smallest pinion R12, see [reference needed]. Figure 7d .like Figure 7e As shown, the engagement point 58 can be parallel or orthogonal to the rotation axis 32 of the multi-layer pinion configuration 12. Figure 7c As shown, the joint point 58 may have axial offset.

[0089] Figure 8a -c shows the smallest pinion R12, which is housed on the spiral plug configuration 14 and meshes with the bicycle chain 5. The bicycle chain 5 is driven by a front sprocket (not shown) and allows the multi-layer pinion configuration 12 to rotate about its axis of rotation 32. The torque transmitted through the bicycle chain 5 to the smallest pinion R12 is transmitted from the smallest pinion R12 to the larger pinion R10, which is connected to the transmission device 16 in a torque-transmitting manner. The connecting sections 60 and 64 arranged between the pinions also facilitate torque transmission between the pinions R10, R11, and R12. Clamping mechanisms for torque transmission, such as meshing teeth and slots, can be provided in the areas of the connecting sections 60 and 64.

[0090] Figure 9a-c illustrates an alternative embodiment of the plug configuration 14, wherein the axially outer stop section 38 is formed by a plurality of snap fasteners 66. The snap fasteners 66 are distributed on the outer periphery of the plug configuration 14 and spaced apart from each other. This embodiment achieves an integral construction of the plug configuration 14. That is, engagement points can be omitted. For this purpose, the snap fasteners 66 and the possible rod sections 36 have some elasticity, thereby holding the plug configuration 14 along... Figure 9a Push the marked direction 72 into the small gear to be accommodated until the groove 41 of the smallest small gear R12 is as shown. Figure 9c It engages with the snap fastener 66 as shown. In the illustrated embodiment, the groove 41 is enlarged by a radially inwardly projecting protrusion 69 on the smallest pinion R12.

[0091] Figure 10a -b illustrates an alternative embodiment of the plug configuration 14, wherein the axially outer stop section 38 is formed by a locking element 68, for example, as an annular element. The locking element 68 engages both with the groove 41 of the smallest pinion R12 and with the slot 70 constructed in the end region of the rod section 36. Thus, the locking element 68 provides axial fixation for the pinion housed on the rod section. When installing the multi-layer pinion assembly 10, the plug configuration is pushed in the direction of arrow 72 into the pinions R12, R11 to be housed until these pinions are arranged in the region of the rod section. Subsequently, the locking element 68 is engaged with the groove 41 and the slot 70.

[0092] Figure 11a -b and Figure 12a -b shows a cross-sectional view of the rear wheel assembly 3 in a certain state, in which the multi-layer pinion assembly 10 and the transmission 16 are arranged close to each other but not coupled. Figure 11a In the embodiment of the multi-pinion configuration 12 shown in -b, the two smallest pinions R11, R12 are connected and rotatable relative to the screw plug configuration. The pinions R11, R12 housed on the rod segment can be positioned at a desired angle relative to another pinion R10, which is anti-rotationally coupled to the transmission 16, either when or after the screw plug configuration 14 is screwed into the transmission device 16. This is feasible because the pinions R11, R12 housed on the rod segment are radially self-supporting, meaning they are not radially supported on the rod segment and can rotate relative to the screw plug configuration 14. The two smallest pinions R12, R11 can be radially fixed by means of a snap-fit ​​mechanism, for example, a snap-fit ​​structure with teeth and slots between the second and third smallest pinions. Alternatively, a different engagement process can be chosen for engagement. The aforementioned embodiments optimize the manufacturing cost of the multi-pinion configuration.

[0093] exist Figure 12aIn the embodiment shown in -b, the two smallest pinions R12 and R11, housed on the rod segment, are connected to the third smallest pinion R10. That is, the angular positions between the three smallest pinions are determined before the screw plug configuration 14 is screwed into the transmission device 16. During the screw plug configuration 14 is screwed into the transmission device 16, the angular positions of the three smallest pinions can be adjusted such that the third smallest pinion R10 can engage with the transmission member profile 26 of the transmission device 16, thereby determining the angular positions of the three smallest pinions of the multi-layer pinion configuration 12 relative to the other pinion. The aforementioned embodiment allows for the simple installation of pinions in the multi-layer pinion configuration that require screw plug mounting.

[0094] One embodiment is described below, in which the screw plug configuration 14 is implemented in a two-part configuration and includes first and second components 74, 76. The two components 74, 76 may be spaced apart from each other. Figure 13a -d and Figure 14a The two components 74 and 76 shown in section -d are connected by interlocking connecting threads 78 and 79 arranged in the region of the rod segment 36. An external thread 40, assigned to the rod segment, is arranged on the first component 74, and an axially outer stop section 38 is arranged on the second component 76. The two components 74 and 76 have corresponding tool interfaces 80 and 82 for engaging the same tool 83. The tool interfaces 80 and 82 are arranged radially inward on the inner circumferential surfaces of the first and second components, respectively. Figure 15 The diagram shows a two-part screw plug configuration 14 and its two components 74 and 76 on the same axis.

[0095] To install the multi-layer pinion assembly 10 with the split-type screw plug configuration 14, tool 83 selectively engages one of the two parts 74, 76 (see...). Figure 16a -b) or snap these two parts 74, 76 (see...) Figure 17 The first component 74 can be screwed into the transmission device 16 first, and then the second component 76 can be screwed into the first component 74. In this arrangement, the first component 74 serves as an annular element with a diameter in the middle. Alternatively, the components 74 and 76 can be connected together before screwing them into the transmission device 16. In both cases, before screwing the two components 74 and 76 together, at least one pinion R12 or R11 to be accommodated is accommodated in the region of the rod segment 36 of one of the components 74 and 76. During installation, the two components 74 and 76 can be screwed together until they stop. Subsequently, one of the components 74 and 76 can be rotated until the tool interfaces 80 and 82 of the two components 74 and 76 are aligned with each other. With sufficient engagement points and small threads 78 and 79, the rotation should produce a small axial offset, for example, an angle of about 29° in the case of 12 engagement points.

[0096] The multi-layer pinion assembly 10 is coupled to or can be coupled to the transmission device 16. The transmission device 16, widely used and thus known in professional fields as a "standard transmission device,"... Figure 18a -c is illustrated as a separate component marked with selected feature dimensions. This component has a transmission profile 26 extending radially outward from the base plane of the transmission device on its radially outer circumferential surface. The transmission profile 26 includes transmission protrusions or so-called splines 84. At least one of the splines 84 has a different dimension than the other splines of the transmission profile 26. The pinion to be fastened to the transmission device 16 typically has an inner profile that is complementary to the transmission profile 26 of the transmission device 16. In this way, the pinion with the corresponding inner profile can engage with the transmission device 16 in a torque-transmitting manner. The number of splines is, for example, greater than or equal to 8, preferably greater than or equal to 9. The number of splines can also be less than or equal to 22.

[0097] The transmission device 16 has a transmission profile 26 on a first region of its radially outer surface, which extends axially outward from the transmission device stop 86 along a first axial length LA1. a The transmission stop 86 generally refers to a portion of the transmission 16 on which the multi-layer pinion configuration 12, fastened to the transmission, is stopped, and the position of the multi-layer pinion configuration 12 relative to the transmission 16 can be determined by this portion. This first axial length LA1 of the transmission 16 is preferably greater than 32.9 mm, preferably 33.2 + / - 0.4 mm. The outer diameter dA1 measured on the radial outer surface of the transmission profile 26 within this first region is, for example, greater than 34.2 mm, preferably 34.5 + / - 0.15 mm.

[0098] like Figure 18a As shown in -c, a first region with the transmission profile 26 is connected to a relatively short second region in which the radially outer surface of the transmission device 16 does not have the transmission profile and is therefore smooth. The second axial length LA2 of the transmission device 16 extends from the transmission stop 86 to the axial outer end side 88 of the transmission device 16 and is 33.9 mm to 35.9 mm, but preferably 34.9 + / - 0.3 mm. The outer diameter dA2 of the second region can be greater than 31.4 mm, preferably 32.1 + 0.4 / - 0.2 mm.

[0099] Furthermore, the transmission device 16 has an internal thread 34 facing radially inward adjacent to its axial outer end side 88. The internal thread 34 preferably has a nominal diameter dA3 greater than 29.8 mm, and more preferably about 30.6 mm. The preferred pitch of the internal thread of the transmission device is 24 TPI, such that, according to known dimensioning, the thread can be characterized as M 30.6 × 24 TPI.

[0100] When applying the multi-layer pinion assembly 10 with transmission device 16, refer to Figure 3 The characteristic dimensions of the rear wheel assembly 3 after installation between the two opposing frame sections 1 and 2 are described. After installation, a first axial distance D1 from the drive stop 86 to the outer surface 46 of the smallest pinion R12 is greater than 38 mm, for example greater than 39.1 mm, and more preferably 39.9 + / - 0.2 mm. A second axial distance D2 from the outer axial end 88 of the drive 16 to the outer surface 46 of the smallest pinion R12 is greater than 4.0 mm, preferably 5.0 + / - 0.2 mm. A third axial distance D3 from the outer surface 46 of the smallest pinion R12 to the circumferential surface 90 of the frame section 1 or the rear fork end 8 is less than 8.2 mm, preferably 7.2 + / - 0.2 mm. In some cases, the frame section 1 or its fork end 8 has a recessed surface 92 for accommodating the shift lug 22. The fourth distance D4 along the axial direction from the outer surface 46 of the smallest pinion R12 to the recessed surface 92 can be less than 12.2 mm, preferably 11.2 + / - 0.2 mm.

[0101] Figure 19 and Figure 20 The following embodiment shown relates to a segmented plug. These segments are located on one or both axial ends 138, 240 of the outer circumferential surface of the plug configuration. The segments of the plug include sections with alternating larger and smaller outer diameters and mate with the similarly segmented inner circumferential surface of the pinion. The segments on the inner circumferential surface of the pinion also include sections with alternating smaller and larger outer diameters. The segmented plug and the segmented pinion can be mechanically connected together and separated by interlocking, which is the principle of bayonet connection.

[0102] Figure 19a Figures 1 and 2 show a view of a first embodiment of a segmented screw plug 114. In this embodiment, the screw plug configuration 114 has a rod segment 36, a segmented stop segment 138, and an external thread 140. The segments on the stop segment 138 include segments having a larger outer diameter d1 and a smaller outer diameter d3. The outer diameter d1 of the larger outer diameter segment is greater than the outer diameter d3 of the rod segment 36. The outer diameter d3 of the smaller outer diameter segment is equivalent to the outer diameter d3 of the rod segment 36. The thread 140 has an outer diameter d2 that is greater than the outer diameter d3 of the rod segment 36.

[0103] The smallest pinion R112 has a segmented inner circumferential surface with a groove 148. Segment 138 of the plug 114 mates with segment 148 of the smallest pinion R112. The smallest pinion R112 has an inner diameter d5 and grooves 148 distributed along its inner circumference. The imaginary diameter along the grooves 148 is larger than the inner diameter d5 of the smallest pinion R112 and also larger than the outer diameter d1 of segment 138 of the plug 114. These two smallest pinions are oriented relative to the plug 114 such that segment 138 of the plug 114 can pass through the groove 148 on the inner circumference of the smallest pinion R112. With pinions R11 and R112 inserted into the plug 114 and positioned in the rod segment 36, the pinions are twisted relative to the plug 114 such that the larger diameter segment 138 of the plug 114 engages the smallest pinion R112 from behind and axially locks it in place—this is particularly relevant to the following description. Figure 19b The inner diameter d5 of the smallest pinions R11 and R112 housed in the plug configuration 114 is greater than the outer diameter d3 of the rod segment 36, allowing the plug configuration 114 to rotate relative to the pinions. The pinions are constructed as self-supporting pinions.

[0104] Furthermore, locking element 168 can axially lock pinions R11 and R112 onto the screw plug 114. After assembly, locking element 168 is axially positioned between the smallest pinion R112 and the segmented stop section 138. Locking element 168 can be constructed as a retaining ring. The smallest pinion R112 can have a groove 141 for receiving the retaining ring 168. The smallest pinions R11 and R112 are axially fixed between the larger diameter thread 140 and the larger diameter section 138, together with the retaining ring 168.

[0105] Figure 20 An alternative embodiment of the segmented screw plug 214 is shown. The outer peripheral surface of the screw plug 214 has segmented threaded sections 240. The screw plug 214 includes a stop section 38, a rod section 36, and segmented threads 240. The operating principle follows the aforementioned embodiment.

[0106] In this case, the external thread 240 is constructed in segments, alternately comprising three threaded sections with larger diameters and three unthreaded sections with smaller diameters. The threaded sections 240 have an outer diameter d2 greater than the outer diameter d3 of the rod section 36. The stop section 38 also has an outer diameter d1 greater than the outer diameter d1 of the rod section 36—see also [reference needed]. Figure 5 The implementation plan.

[0107] The smallest pinion R212 has a segmented inner circumferential surface with a groove 248. Segment 240 of the plug 214 matches segment 248 of the smallest pinion R212. The smallest pinion R212 has an inner diameter d5 and grooves 248 distributed along its inner circumference. The imaginary inner diameter along the grooves 248 is larger than the inner diameter d5 of the smallest pinion R212, and also larger than the outer diameter d1 of the stop section 38 of the plug 214. The two smallest pinions R211 and R212 are oriented relative to the plug 214 such that segment 240 of the plug 214 can pass through the groove 248 on the inner circumference of the smallest pinion R212. With the pinions R211 and R212 inserted into the plug 214 and positioned in the rod segment 36, the pinions are twisted relative to the plug 214 such that the larger diameter threaded segment 240 of the plug 214 engages the smallest pinion R212 from behind and axially locks it—this is particularly relevant to the following... Figure 19b .

[0108] Advantageously, this embodiment requires neither additional components (such as retaining rings) nor engagement techniques. Once the smallest pinion is mounted on the screw plug configuration 214, these pinions cannot be pulled out axially due to the presence of the axial stop section 38. If, in the next step, the screw plug configuration 214 with pinions R211, R212 is screwed to the internal thread 34 of the transmission via the threaded section 240, the pinions are also axially secured inward.

[0109] exist Figure 21a , 21b In the illustrated embodiment, the plug is first manufactured as a single piece or integral unit, and then, in a subsequent processing step, its outer diameter is increased at one or both axial ends through a modification. This allows for low-cost manufacturing without the use of additional components or joining processes. The outer diameter of the axial stop section and / or threaded section can be increased by modification, for example, by crimping.

[0110] Figure 21a A cross-sectional view of a one-piece helical plug 314 is shown, which has a thread 40, a rod segment 36, and an axial end connecting the rod segment (which is not yet modified). The axial end and the rod segment 36 have equal outer diameters d3. Figure 21b The modified stop section 338 with a larger outer diameter d1 is shown. Through this modification, the outer diameter d1 of the axially outer stop section 338 is increased relative to the outer diameter d3 of the rod section 36. Alternatively, a threaded section 40 with a larger diameter can also be manufactured through this modification. Subsequently, other machining steps, such as thread (re)cutting, can be performed.

[0111] Even though the foregoing embodiments pertain to a multi-layer pinion configuration with 12 pinions, the present invention can also be applied to multi-layer pinion configurations with other numbers of teeth, such as 11 or 13 pinions.

Claims

1. A multi-stage pinion assembly for a rear wheel assembly of a bicycle with a chain gear, the multi-stage pinion assembly comprising a multi-stage pinion configuration and a screw plug configuration, - wherein the multi-stage pinion configuration - is adapted to be coupled with a transmission of the rear wheel assembly in a torque transmitting manner, and - comprises at least eleven pinions with different numbers of teeth, - wherein the multi-stage pinion assembly is constructed in such a way that, after installation, at least two of the smallest pinions are axially fixed on the transmission by means of the screw plug configuration, - wherein the screw plug configuration has a stem section for accommodating at least one of the at least two smallest pinions, wherein the stem section is provided on one end region thereof with an axial outer stop section, and wherein the stem section is assigned at least one outer thread on its opposite end region, by means of which the screw plug configuration can be screwed into a corresponding inner thread to fix the screw plug configuration, - wherein the outer thread assigned to the stem section has an outer diameter which is greater than the outer diameter of the stem section in the region in which the at least one of the at least two smallest pinions is accommodated, characterized in that - the axial outer stop section is detachable from the stem section and is constructed in the form of a clasp which can be connected with the stem section and snapped into a groove of the stem section.

2. The multi-stage pinion assembly according to claim 1, wherein at least one pinion is accommodated on the stem section together with a connecting section assigned to the pinion.

3. The multi-stage pinion assembly according to claim 1, wherein two pinions are accommodated on the stem section together with a connecting section arranged therebetween.

4. The multi-stage pinion assembly according to any one of claims 1 to 3, wherein at least one of the at least two smallest pinions accommodated on the stem section is constructed to be self-supporting.

5. The multi-stage pinion assembly according to any one of claims 1 to 3, wherein - the outer thread assigned to the stem section is integrally formed on the stem section or integrally produced with the stem section.

6. The multi-stage pinion assembly according to any one of claims 1 to 3, wherein - the screw plug configuration has at least one engagement point, and - the at least one engagement point is orthogonal or parallel to the axis of rotation of the multi-stage pinion configuration.

7. The multi-stage pinion assembly according to any one of claims 1 to 3, wherein - the screw plug configuration comprises a first and a second part which can be detached from one another, - the outer thread assigned to the stem section is surrounded by the first part, and - the axial outer stop section is surrounded by the second part.

8. The multi-stage pinion assembly according to claim 7, wherein the first and the second part can be screwed into one another.

9. The multi-stage pinion assembly according to claim 7, wherein the first part has a first tool interface and the second part has a second tool interface, wherein the two tool interfaces are adapted to be snapped into by the same tool or by two different tools.

10. The multi-layer pinion assembly according to claim 9, wherein the first part further has a first connecting thread, which is adapted to snap into a complementary second connecting thread of the second part, wherein the first connecting thread and the complementary second connecting thread - are arranged between the stem segment and the outer thread assigned to the stem segment, or - are arranged within a region of the stem segment, or - are arranged between the stem segment and the axial outer stop segment.

11. The multi-layer pinion assembly according to claim 10, wherein the first connecting thread is an outer thread and the complementary second connecting thread is an inner thread, or wherein the first connecting thread is an inner thread and the complementary second connecting thread is an outer thread.

12. The multi-layer pinion assembly according to any one of claims 1 to 3, wherein the at least one pinion accommodated on the stem segment is rotatable relative to the plug configuration.

13. The multi-layer pinion assembly according to any one of claims 1 to 3, wherein an outer diameter of the outer thread assigned to the stem segment is larger than an inner diameter of the smallest pinion of the multi-layer pinion configuration.

14. The multi-layer pinion assembly according to any one of claims 1 to 3, wherein the smallest pinion of the multi-layer pinion configuration has a radial and axial groove on its outer side, which is constructed in such a way that the axial outer stop segment can snap into the groove.

15. The multi-layer pinion assembly according to claim 14, wherein in the case that the axial outer stop segment snaps into the radial and axial groove of the smallest pinion of the multi-layer pinion configuration, - the outer side of the smallest pinion is arranged axially further out than an end side of the axial outer stop segment, or - the outer side of the smallest pinion is aligned with the end side of the axial outer stop segment, or - the axial outer stop segment protrudes less than a maximum of 0.5 mm axially outwards from the outer side of the smallest pinion.

16. The multi-layer pinion assembly according to any one of claims 1 to 3, wherein the plug configuration is implemented in one piece and is provided as a 3D printed component with at least one pinion accommodated on the stem segment.

17. The multi-layer pinion assembly according to any one of claims 1 to 3, wherein: - the transmission has a transmission contour on a first transmission region of its radially outer surface, which is arranged along a first axial transmission length in a direction axially outwards from a transmission stop, - wherein the first axial transmission length is further smaller than a second axial transmission length, which extends from the transmission stop to an axially outer end side of the transmission, - wherein the transmission further has no transmission contour on a second transmission region of its radially outer surface adjacent to the axially outer end side of the transmission, - wherein the transmission further has an opening, which extends radially outwards from a transmission center axis and axially inwards from the axially outer end side of the transmission, and - wherein the opening has the inner thread on its radially inner surface. ​ ​ 18. The multi-layer pinion assembly according to claim 17, wherein - the first axial transmission length of the transmission from the transmission stop to the end of the transmission profile is greater than 32.9 mm, or / and - the second axial transmission length of the transmission from the transmission stop to the axially outer side of the transmission is greater than 34.2 mm, or / and - a first transmission outer diameter of the transmission within a first transmission region along the first axial transmission length of the transmission is greater than 34.2 mm, or - a second transmission outer diameter of the transmission within a second transmission region adjacent to the axially outer side of the transmission is greater than 31.4 mm, or / and - a first transmission inner diameter of the transmission axially adjacent to the axially outer side thereof is greater than 29.8 mm.

19. The multi-layer pinion assembly according to any one of claims 17, wherein the multi-layer pinion assembly is constructed in such a way that, after installation, the following applies: - a first distance in axial direction from the transmission stop to the outer side of the pinion with the smallest number of teeth is greater than 38.0 mm, or / and - a second distance in axial direction from the axially outer side of the transmission to the outer side of the smallest pinion is greater than 4.0 mm.

20. The multi-layer pinion assembly according to claim 19, wherein a first space utilization factor resulting from the ratio of the second axial transmission length to the second distance is in the range of 5 to 10.

21. The multi-layer pinion assembly according to claim 19, wherein a second space utilization factor resulting from the ratio of the first axial transmission length to the second distance is in the range of 5 to 10.

22. The multi-layer pinion assembly according to claim 17, wherein the transmission profile comprises splines protruding radially from the outer circumferential surface thereof, wherein the number of splines is greater than or equal to 8.

23. A rear wheel assembly for a bicycle having a chain-type gear shift device, comprising: - a rear hub arrangeable between two opposing frame sections of a bicycle frame, - a transmission rotatably coupled with the rear hub, and - a multi-layer pinion assembly according to any one of claims 1 to 22, - wherein the multi-layer pinion assembly is configured with a multi-layer pinion arrangement that is or can be anti-rotationally coupled with the transmission. ​

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