Transmission element for torque transmission from sprocket to hub

Abstract

A transmission component (transmission member) (1) is used to transmit torque from a sprocket group (3) of a sprocket (5) to a bicycle rear wheel hub (9), the bicycle rear wheel hub is supported on an axle (7) in a bearing manner, and the transmission component is equipped with a first interface (13), the first interface is used to connect to the sprocket (5). The first interface is arranged so that the first interface fixes the sprocket or the box body to the transmission member in an axial and / or radial and / or tangential direction. The transmission member (1) is further equipped with a second interface (15), the second interface is used to connect to the sprocket (5). The second interface is arranged so that the second interface fixes the sprocket to the transmission member in an axial and / or radial and / or tangential direction. The second interface (15) has a larger diameter than the first interface (13).

Description

Technical Field

[0001] The invention relates to a transmission component (transmission member) for transmitting torque from a sprocket to a hub, the sprocket forming part of a sprocket set (cassette), the hub bearing on the axle of the rear wheel of a bicycle, and the transmission component (transmission member) is equipped with a first adapter for coupling to the hub and a first interface for coupling to the sprocket, the first interface being arranged so that the first interface fixes the sprocket or the cassette to the transmission member in the axial and / or radial and / or tangential direction, or the first interface being arranged so that the sprocket or the sprocket set is supported on the transmission component in the axial and / or radial and / or tangential direction. The adapter forms the connection between the two components in conjunction with a coupling part present in or on the hub, and the interface forms the connection between the two components in conjunction with a coupling part present in or on the sprocket. In the sprocket set (cassette), the sprockets can be attached to each other or connected to each other via a sprocket carrier. The bicycle can also be equipped with sprockets of various subgroups, which are present in the transmission component. Background Art

[0002] Transmission components (transmission elements) of this type are generally known. Summary of the invention

[0003] The object of the invention is to provide a transmission component (transmission element) of the type defined in the opening paragraph, to which a sprocket can be attached in an optimal manner. To this end, the transmission element according to the invention is characterized in that the transmission element is further equipped with a second interface for coupling to the sprocket, wherein the second interface is arranged such that it fixes the sprocket to the transmission element in the axial and / or radial and / or tangential direction and the second interface has a larger diameter than the first interface, which is understood to mean that the distance from the second interface to the axis of the wheel axle is greater than the distance from the first interface to the axis of the wheel axle.

[0004] An embodiment of the transmission member according to the present invention is characterized in that the transmission member is further equipped with a third interface, which is used to connect to the sprocket (or sprocket group), and the third interface is configured so that the third interface fixes the sprocket to the transmission member along the axial and / or radial and / or tangential direction, wherein the third interface has a larger diameter than the second interface.

[0005] A further exemplary embodiment of the transmission element according to the invention is characterized in that the first and / or the second interface is able to fix / support the sprocket in the axial direction.

[0006] A further embodiment of the transmission element according to the invention is characterized in that only the second interface is able to fix / support the sprocket in the axial direction.

[0007] Preferably, the diameter of the second interface is at least 5 mm larger than the diameter of the first interface.

[0008] Furthermore, the diameter of the second or third interface is preferably 10 mm larger than the diameter of the first interface.

[0009] Furthermore, a further embodiment of the transmission element according to the invention is characterized in that the first and second interfaces fix the sprockets of the first subgroup to the transmission element, and the second and third interfaces fix the sprockets of the second subgroup to the transmission element.

[0010] The transmission member is preferably provided with an internal thread for cooperating with the locking nut.

[0011] Furthermore, the transmission preferably comprises a transmission device, which is present between the adapter and one or more interfaces. The transmission device is preferably formed by a planetary gear set, which comprises at least three rotating members, wherein a first rotating member is connected to one or more interfaces, a second rotating member is connected to the adapter, and a third rotating member can be coupled to the axle.

[0012] The invention also relates to a sprocket assembly (sprocket carrier / cassette) for use in a transmission according to the invention. With regard to such a cassette, the invention is characterized in that the cassette is equipped with a first and a second additional interface, which are respectively coupled to a first and a second interface of the transmission.

[0013] An embodiment of the cassette according to the invention is characterized in that two additional interfaces are present in the cassette with different diameters.

[0014] A further embodiment of the box body according to the invention is characterized in that the box body is closed in the axial direction relative to the transmission element by means of the first and / or second interface and the first and / or second additional interface cooperating therewith.

[0015] A further embodiment of the box body according to the invention is characterized in that the box body is closed relative to the transmission element in the axial direction by means of the second interface and a second additional interface cooperating therewith, while the locking nut provides the axial pressure.

[0016] Furthermore, a further embodiment of the cassette according to the invention is characterized in that the cassette is equipped with a third additional interface, which positions the cassette on the transmission member in the axial and / or radial and / or tangential direction.

[0017] A further embodiment of the cassette according to the invention is characterized in that three additional interfaces are present in the cassette with different diameters.

[0018] Preferably, the diameter of the second additional interface is at least 5 mm larger than the diameter of the first additional interface.

[0019] Furthermore, the diameter of the second or third additional interface is preferably 10 mm larger than the diameter of the first additional interface.

[0020] A further embodiment of the cassette according to the invention is characterized in that the cassette comprises at least two sub-sets of sprocket wheels which are connected to one another after being mounted on the transmission element. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The invention will be described in more detail below based on examples of embodiments of the transmission member and the sprocket set (cassette) according to the invention presented in the accompanying drawings, in which:

[0022] Figure 1 A schematic diagram of the rear wheel structure is given to illustrate the known transmission components;

[0023] Figure 2 A schematic diagram of a rear wheel structure via an embodiment of a transmission member according to the present invention is given;

[0024] Figure 3 Show Figure 2 A cross-sectional view of a transmission member of a rear wheel axle structure shown in FIG.

[0025] Figure 4 A three-dimensional diagram of a transmission member having a sprocket set is provided;

[0026] Figure 5 A cross-sectional view of a transmission member having a sprocket set is given;

[0027] Figure 6 Give a cross-sectional view of the sprocket assembly;

[0028] Figure 7 A cross-sectional view of a transmission member having two sub-assembly sprockets is given;

[0029] Figure 8 Give a stereoscopic view of the two sub-assembly sprockets. DETAILED DESCRIPTION

[0030] Figure 1A schematic diagram of a rear wheel construction is given to show a known transmission 1' for transmitting torque from a sprocket 5 to a hub 9, which forms part of a sprocket set 3' and which is bearing-supported on the axle 7 of the rear wheel of a bicycle. The known transmission 1' is equipped with an adapter 11 for coupling to the hub and first and second interfaces 13' and 15' for coupling to the sprocket set 3'. The interfaces are arranged so that they fix the sprocket set (cassette) to the transmission in the axial and / or radial and / or tangential direction. A pin 25 is inserted through the axle, which together with two axial tabs 27 locks the axle 7 in a dropout 23 of the bicycle frame. A locking nut 21 is turned into an internal thread in the transmission 1' and locks the sprocket set 3' in the axial direction between the second interface 15' and the locking nut.

[0031] The invention relates to a transmission element (formed by a sleeve) and to individual sprockets, which are pushed together into a housing. The sleeve (transmission housing) comprises at least three interfaces, which provide for receiving the sprockets. Furthermore, the transmission element is threaded and there is a locking nut, by means of which all the sprockets can be fixed together.

[0032] The three interfaces all have different diameters from the transmission member, wherein the first interface has the smallest diameter and the third interface has the largest diameter. The second interface is between the first interface and the third interface in diameter.

[0033] The second interface is provided with an axial tab at which the sprocket can be pretensioned by means of a locking nut. The advantage of the additional axial second interface according to the invention is that the power loop between the locking nut and the axial tab is shorter than when an axial tab would be used in the third interface. Due to the shorter power loop over the smaller sprocket, the locking is much more rigid and more defined.

[0034] If axial tabs were used in the first interface, it would be impossible (or almost impossible) to tighten a cassette consisting of two or more parts by means of one locking nut.

[0035] In a preferred embodiment, the transmission (gear system) is present below the box body. The box body includes at least a single sprocket, but preferably includes a combination of sprockets.

[0036] Figure 2 The following figures show an embodiment of a transmission member 1 according to the invention. The transmission member 1 comprises a second interface 15 for connecting to the sprocket 5. The second interface is arranged so that it fixes the sprocket to the transmission member in the axial and / or radial and / or tangential direction. The second interface 15 has a larger diameter than the first interface 13.

[0037] The transmission member further comprises a third interface 17, which is used to be connected to the sprocket 15, and the third interface is arranged so that the third interface fixes the sprocket to the transmission member 1 in the axial and / or radial and / or tangential direction, and at the same time, the third interface has a larger diameter than the second interface 15. The second interface 15 fixes / supports the sprocket 5 in the axial direction.

[0038] The diameter of the second interface 15 is at least 5 mm larger than the diameter of the first interface 13 , and the diameter of the second or third interface 15 , 17 is at least 10 mm larger than the diameter of the first interface 13 .

[0039] The first and second interfaces 13, 15 fix the sprockets of the first subset (A) to the transmission 1, and the second and third interfaces 15, 17 fix the sprockets of the second subset (B) to the transmission.

[0040] The transmission element 1 has an internal thread 19 for cooperating with a locking nut 21. The transmission element 1 comprises a transmission device 29 which is located between the adapter 11 and the one or more interfaces 13, 15, 17.

[0041] The transmission 29 is formed by a planetary gear set comprising at least three rotating members, wherein a first rotating member 31 is connected to one or more interfaces 13 , 15 , 17 , a second rotating member 33 is connected to an adapter and a third rotating member 35 can be coupled to the axle 7 .

[0042] The box body 3 includes a first and a second additional interface 37, 39, which are respectively connected to the first and second interfaces 13, 15 of the transmission member, and the two additional interfaces 37, 39 are present in the box body 3 with different diameters. The box body 3 is closed relative to the transmission member 1 in the axial direction by means of the first and / or second interface 13, 15 and the first and / or second additional interface 37, 39 cooperating therewith.

[0043] The box body is closed relative to the transmission member in the axial direction by means of the second interface and the second additional interface cooperating therewith, while the locking nut provides axial pressure. The box body 3 includes a third additional interface 41, which positions the box body on the transmission member 1 in the axial and / or radial and / or tangential direction. The three additional interfaces 37, 39, 41 are present in the box body 3 with different diameters.

[0044] The diameter of the second additional interface 39 is at least 5 mm larger than the diameter of the first additional interface 37. The diameter of the second or third additional interface 39, 41 is at least 10 mm larger than the diameter of the first additional interface 37.

[0045] The cassette comprises at least two subsets (A, B) of sprockets 5 which are connected to one another once mounted on the transmission 1 .

[0046] Figure 4 The transmission and the cassette (road, one-piece, steel) are shown in an isometric view. For ease of understanding, the one-piece cassette is cut away to reveal certain details regarding the connection to the transmission.

[0047] The following table gives an overview of all interface directions. Figure 4 The directions indicated in the illustration are described.

[0048]

[0049]

[0050] (1) Composite box variants require radial alignment. Single-piece (road) box does not require radial alignment: this would result in excessive restriction.

[0051] Figure 5 Based on the interface overview mentioned in the previous table and the attached figure, Figure 1 The assembly description of the box body and the transmission member shown in is as follows:

[0052] The box (one-piece body) is radially supported in interface #1 and interface #3;

[0053] The composite box is radially supported in interface #1, interface #2 and interface #3;

[0054] At interface #1 and interface #3, the one-piece and composite cassettes transfer torque to the transmission element;

[0055] The smallest sprocket is radially supported and transmits torque to the drive member at interface #1 and is typically a 11t sprocket manufactured as a single component and is not part of the one-piece cassette body;

[0056] The smallest individual sprocket is pressed axially onto the (A / B) body of the cassette with the aid of a locking ring and screwed into the internal thread of the transmission element;

[0057] The cassette body (A / B) is pressed axially to the axial surface at interface #2 via the aforementioned separate sprocket;

[0058] exist Figure 6 In FIG. 1 , a road cassette is shown manufactured as a one-piece assembly. The smallest sprocket may be separate but should have an equivalent spline profile on the inner diameter of the sprocket.

[0059] Figure 7 and 8 The box design shown in proposes a composite construction. The purpose of this composite construction is to produce a lighter box.

[0060] Component (A) is made of steel (including the smallest sprocket, either alone or integrated). Since the chain forces on the largest sprocket are generally lower, component (B) can be made of a material such as titanium that has lower strength and weight than steel.

[0061] The proposed design is such that first part (B) is mounted to the transmission, followed by part (A) and the single smallest sprocket (A') if used. Part (B) will have axial tabs which will effectively locate the entire cassette in the axial direction.

[0062] Provision needs to be made to maintain proper rotational alignment (timing) between components (A) and (B), however no torque transfer through such alignment is required.

[0063] Although the present invention has been described above based on the drawings, it should be noted that the present invention is not limited in any way or device to the embodiments shown in the drawings. The present invention also extends to all embodiments that deviate from the embodiments shown in the drawings within the scope defined by the claims.

Claims

1. A transmission member (1) for transmitting torque from a cassette (3) comprising a set of sprockets (5) attached to one another to a wheel hub (9), the wheel hub (9) being bearing-supported on the axle (7) of the rear wheel of a bicycle via the transmission member, and comprising: An adapter (11), the adapter being used to be connected to the wheel hub; A transmission housing, the transmission housing comprising: a first interface (13), the first interface (13) being used to be connected to the box body (3), the first interface being arranged so that the first interface fixes the box body to the transmission member in an axial and / or radial direction rather than in a tangential direction, an additional interface (15, 17) for connecting to the box body (3), wherein the additional interface is arranged so that the additional interface fixes the box body to the transmission member in a tangential direction, and the additional interface (15, 17) has a larger diameter of the transmission member than the first interface (13), and A transmission device is formed by a planetary gear set, the planetary gear set comprising at least three rotating members, wherein a first rotating member (31) is connected to the first interface (13) and the further interfaces (15, 17), a second rotating member (33) is connected to the adapter (11), and a third rotating member (35) can be coupled to the wheel axle (7).

2. The transmission member according to claim 1, characterized in that: The other interface (15, 17) comprises a second interface (15) and a third interface (17), the second interface being used to be connected to the box body (3), and the second interface being arranged so that the second interface fixes the box body (3) to the transmission member (1) in an axial and / or radial and tangential direction, wherein the second interface (15) has a diameter larger than that of the first interface (13) and smaller than that of the third interface (17).

3. The transmission member according to claim 2, characterized in that: The first interface (13) and / or the second interface (15), and / or the third interface (17) can fix the box body (3) in the axial direction.

4. The transmission member according to claim 2, characterized in that: Only the second interface (15) can fix the box body (3) in the axial direction.

5. The transmission member according to claim 1, characterized in that: The diameter of the further interface (15, 17) is at least 5 mm larger than the diameter of the first interface (13).

6. The transmission member according to claim 2, characterized in that: The diameter of the second interface (15) or the third interface (17) is at least 10 mm larger than the diameter of the first interface (13).

7. The transmission member according to claim 2, characterized in that: The box body comprises a first subgroup (A) and a second subgroup (B), the first interface (13) and the second interface (15) fix each sprocket of the first subgroup (A) to the transmission member (1), and the second interface (15) and the third interface (17) fix each sprocket of the second subgroup (B) to the transmission member.

8. The transmission member according to claim 1, characterized in that: The transmission member (1) is provided with an internal thread (19) for cooperating with a locking nut (21).

9. A box body (3), applied to a transmission member (1) as claimed in any one of the preceding claims, characterized in that: The box body (3) comprises a first additional interface (37) and another additional interface (39, 41), wherein the first additional interface (37) and the other additional interface (39, 41) are respectively connected to the first interface (13) and the other interface (15, 17) of the transmission member.

10. The box body according to claim 9, characterized in that: The additional interfaces (37, 39, 41) are present in the box body (3) with different diameters.

11. The box body according to claim 9, characterized in that: The box body (3) is defined in an axial direction relative to the transmission member (1) by means of the first interface (13) and / or the other interface (15, 17) and the first additional interface (37) and / or the other additional interface (39, 41) coordinated therewith.

12. The box body according to claim 9, characterized in that: The box body is delimited in the axial direction relative to the transmission element by means of the further interface and the further additional interface cooperating therewith, wherein the locking nut (21) provides the axial pressure.

13. The box body according to claim 9, characterized in that: The further additional interfaces (39, 41) include a second additional interface (39), wherein the second additional interface (39) positions the box body on the transmission member (1) in the axial and / or radial and tangential directions.

14. The box body according to claim 13, characterized in that: The additional interfaces (37, 39, 41) are present in the box body (3) with different diameters.

15. The box body according to claim 9, characterized in that: The diameter of the further additional interface (39) is at least 5 mm larger than the diameter of the first additional interface (37).

16. The box body according to claim 13, characterized in that: The diameter of the further additional interface (39, 41) is at least 10 mm larger than the diameter of the first additional interface (37).

17. A box as claimed in any one of claims 9 to 16, characterized in that: The box body comprises at least two subgroups (A, B) of sprockets (5), and the sprockets of the at least two subgroups are connected to each other after being mounted on the transmission member (1).

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