Fastening assembly for bicycle, bicycle and pre-assembled structural unit

Abstract

The invention relates to a fastening arrangement (1a) for a bicycle (1), in particular an electric bicycle or an electric moped, having at least one stepped screw (6) for fastening a drive unit (2) to a bicycle frame (3), having a first screw receptacle (14), having a second screw receptacle (17), the invention relates to a drive unit (2) comprising a first bolt receptacle (14, 17) having a hollow cylindrical base body (16) through which a longitudinal bore (15) penetrates and a second bolt receptacle (19) having a hollow cylindrical base body (19) through which a longitudinal bore (18) penetrates, the base bodies (16, 19) of the two bolt receptacles (14, 17) being insertable or inserted in such a way into two housing openings (21, 22) of a housing (5) of the drive unit (2), said two housing openings (21, 22) facing each other.

Description

Technical Field

[0001] The invention relates to a fastening assembly for a bicycle, in particular an electric bicycle or an electric assisted bicycle, according to the subject matter of the claims, in particular to a bicycle having the fastening assembly and also in particular to a preassembled structural unit. Background Art

[0002] In bicycles of the type mentioned above, various fastening assemblies are currently used to fasten the bicycle's drive motor to the bicycle frame. For example, see WO 2022 / 043182 A1, which describes an exemplary fastening assembly. A disadvantage is that known fastening devices require cost-intensive and laborious assembly, particularly due to the large number of existing components. Another challenge is providing sufficient vibration damping by the fastening assembly so that vibrations from the drive motor are not transmitted to the frame, and that frame vibrations that occur during travel due to external excitation of the frame are not transmitted to the drive. Summary of the Invention

[0003] The object of the present invention is therefore to provide a fastening assembly for a bicycle that is improved with respect to the above-mentioned disadvantages or at least one further embodiment, by means of which the drive unit and bicycle frame of the bicycle can be assembled relatively easily and sufficient vibration damping and / or vibration decoupling can also be achieved. Furthermore, a bicycle having such a fastening assembly and a preassembled unit are to be provided.

[0004] In the present invention, this object is achieved by the subject matter of the independent claims. Advantageous embodiments are the subject matter of the dependent claims, the description and the drawings.

[0005] The basic idea of the present invention is to provide a fastening assembly for a bicycle, in particular an electric bicycle (E-Bike) or an electric pedelec (Pedelec), which has a reduced number of components compared to known fastening assemblies and / or is further able to achieve sufficient vibration damping and / or vibration decoupling.

[0006] To this end, the present invention provides a fastening assembly for a bicycle, particularly an electric bicycle or electric assisted bicycle, comprising a stepped bolt for fastening a bicycle drive unit to a bicycle frame. The stepped bolt comprises a shank and a head. The shank comprises a threaded section, a first, unthreaded circular section disposed on the threaded section, a second, unthreaded circular section disposed on the first circular section, and a shank step disposed between the first and second circular sections, circumscribing the bolt's central axis. The head is disposed on the second circular section of the shank. The threaded section advantageously forms or comprises a free bolt end facing away from the head of the stepped bolt, and a nut. Furthermore, the fastening assembly comprises a first bolt receiver, the first bolt receiver having a hollow cylindrical base body through which a longitudinal bore extends, and a second bolt receiver having a hollow cylindrical base body through which a longitudinal bore extends. The base bodies of the two bolt receivers can be inserted into or into two opposing housing openings of a housing of a bicycle drive unit that define a common opening central axis. Here, the base of the first bolt receptacle (also referred to herein as the first base) is fixed or secured in a torsionally fixed and axially fixed manner to the inner circumference of the first housing opening of the housing, facing the central axis of the opening. The base of the second bolt receptacle (also referred to herein as the second base) is fixed or secured in a torsionally fixed and axially fixed manner to the inner circumference of the second housing opening of the housing, facing the central axis of the opening. Furthermore, it is advantageous if the bicycle frame has two opposing frame openings that, when the bicycle is assembled, align with the two housing openings of the drive unit housing. Furthermore, it is provided that the stepped bolt can be passed through or through the two frame openings, the two housing openings, and the longitudinal bore of the base of the bolt receptacle, and that the stepped bolt can be supported or secured by its head in a contacting manner on the bicycle frame. Additionally, an intermediate element, in particular a washer, made of metal, plastic, or another (elastic) material, can be arranged between the head of the stepped bolt and the bicycle frame. Furthermore, the first base body can be supported on or on the first circular segment, the second base body can be supported on or on the second circular segment, and the nut can be screwed onto or onto the threaded section of the stepped bolt and tightened so that the nut can be supported on or on the bicycle frame and the first base body can be clamped between or between the shank step of the stepped bolt and the bicycle frame. It is straightforward and clear to a person skilled in the art that the threaded section of the stepped bolt carries an external thread that is designed to be complementary to the internal thread of the nut, such that the external and internal threads are thread-compatible with each other.

[0007] As a result, the drive unit and the bicycle frame can be assembled relatively easily and relatively cost-effectively. In addition, the drive unit can be disassembled from the bicycle frame relatively cost-effectively and quickly by removing the nut from the stepped bolt and extracting the stepped bolt from the frame opening, the two housing openings, and the longitudinal bore of the base body of the bolt receptacle.

[0008] Advantageously, the second base body can be supported on the second circular segment in a sliding seat, in particular in a second sliding seat. In other words, the second base body is supported directly on the stepped bolt. As a result, when the drive unit is mounted on the bicycle frame, the stepped bolt can be inserted or passed through the longitudinal hole of the second base body and can be aligned or aligned relative to the second base body, in particular along the central axis of the opening.

[0009] Can be arranged at this, the second matrix only receives or (at least) only receives radial force basically.In addition, the second matrix can be arranged between the head of the step bolt and the rod step of the step bolt.

[0010] Furthermore, it can be provided that, for example, during normal operation of the bicycle, the first base body is supported in the sliding seat, in particular in the first sliding seat, on the first circular segment. In other words, the first base body is supported directly on the stepped bolt. As a result, when the drive unit is mounted on the bicycle frame, the stepped bolt can be inserted or passed through the longitudinal hole of the first base body and can be aligned or oriented relative to the first base body, in particular along the central axis of the opening.

[0011] In this case, it can be provided that the first and / or second base body absorbs both axial forces and radial forces during normal operation of the bicycle.

[0012] Furthermore, a further step, in particular a circumferential undercut, can be arranged between the first circular section and the threaded section.

[0013] Alternatively, the threaded section may have a thread diameter, the first circular section may have a first diameter, and the second circular section may have a second diameter, wherein the second diameter of the second circular section is greater than the first diameter of the first circular section, and / or the first diameter of the first circular section is greater than or equal to the thread diameter of the threaded section. This provides a suitable embodiment of a stepped bolt that ensures simple and quick assembly of the drive unit on a bicycle frame. Since the diameter of the first circular section is preferably smaller than the diameter of the second circular section, the inner diameter of the inner sleeve of the first base body is preferably smaller than the inner diameter of the inner sleeve of the second base body. In other words, the outer sleeve of the first base body is larger than the outer sleeve of the second base body. Alternatively or additionally, the inner sleeve of the first base body may be larger than the inner sleeve of the second base body. The larger inner sleeve of the first base body has the advantage that the inner sleeve can absorb correspondingly larger axial and / or radial forces.

[0014] It is expedient that the shank of the step bolt can be realized as a solid shank or a hollow shank. In this case, the solid shank is in particular free of or (at least) substantially free of a cavity. The hollow shank can be penetrated by a through-hole, which extends along the bolt center axis of the step bolt over the entire longitudinal extension of the shank. In this case, the through-hole can also completely penetrate the head of the step bolt in the axial direction. In the sense of the present invention, a solid shank does not have a through-hole extending along the bolt center axis over the entire longitudinal extension of the shank. The head of a step bolt with a solid shank can have a tool receiving opening, which extends through the head in sections or completely and along the bolt center axis, and which is used to insert a manipulation tool.

[0015] Furthermore, it can be provided that the nut is designed as a cap nut or as a nut with a through-opening. In particular, the cap nut has an opening with an internal thread, wherein the opening does not extend through the head section of the cap nut. In the case of a nut with a through-opening, the through-opening extends completely through the nut. In both the cap nut and the nut with a through-opening, the internal thread can extend either completely or only partially along the opening or the through-opening.

[0016] An “opening” in the sense of the invention is in particular a recess and furthermore in particular a hole.

[0017] Furthermore, it can be provided that the nut is designed as a concentric nut or as an eccentric nut. The eccentric nut, which can be provided in large quantities at a cost-effective cost, can prevent the eccentric nut from accidentally opening due to vibrations or jitters that occur during normal operation of the bicycle. The bicycle frame of the bicycle can have a housing receiving section that is complementary to the eccentric nut. In the assembled state of the bicycle, the eccentric nut is received in this housing receiving section and supported on this housing receiving section to prevent opening movements.

[0018] Furthermore, it can be provided that the nut or eccentric nut is received in the bicycle frame, in particular in a housing receiving section that is designed complementarily to the nut or eccentric nut, such that the nut or eccentric nut is at least partially or completely sunken into the housing receiving section. As a result, the nut or eccentric nut does not protrude or only partially protrudes from the surface of the bicycle frame, thereby preventing damage or destruction.

[0019] In particular, it can be provided that the first base body and the second base body each have an outer sleeve and an inner sleeve, wherein the inner sleeve is respectively fixed to the outer sleeve and is coaxially received inside the outer sleeve. Thus, the base body can, so to speak, have different layers, via which the mechanical properties of the base body, in particular the damping properties and / or the stiffness properties, can be adapted within certain limits to the conditions occurring during normal operation of the bicycle.

[0020] Can be provided with here, outer sleeve can have the material with vibration damping and / or vibration decoupling performance or be made by such material, and be set up for making bicycle frame with respect to drive unit vibration decoupling.Corresponding material with vibration damping and / or vibration decoupling performance can be for example rubber material or elastomer or silicone.In addition, outer sleeve can be made by the mixture of different rubber materials, or by the mixture of different rubber materials and metal or metal mesh (Metallgeflecht) or one or more metal alloys or other similar materials.By means of the bolt receiving portion of corresponding configuration, can realize the suitable vibration decoupling of bicycle frame with respect to drive unit, make that the vibration from drive unit owing to the reason of operation is not actually transmitted on the bicycle frame, and vice versa.Thus, significantly improve the comfort that the rider of bicycle experiences when using bicycle, especially during travel.Can select the material with vibration damping and / or vibration decoupling performance so that the vibration of specific frequency is damped.

[0021] In addition, it can be provided that the outer sleeve has an anti-rotation device, by means of which the corresponding matrix can be fixed on or fixed in the corresponding housing opening in a torsionally rigid manner. For example, the anti-rotation device can be formed by a longitudinal projection or can have such a longitudinal projection. The longitudinal projection can extend expediently on the outside of this outer sleeve longitudinally of the outer sleeve. It is suitable that the longitudinal projection of the anti-rotation device can be arranged in or be arranged in at least one longitudinal groove of the housing of the drive unit, and this longitudinal groove can be arranged in or be arranged in a housing opening in the described housing opening of the housing. Alternatively or additionally, an opposite solution can be considered, in which the longitudinal projection is arranged in a housing opening in the described housing opening of the housing, and the outer sleeve has the longitudinal groove that forms the anti-rotation device, and this longitudinal groove for example extends expediently on the outside of this outer sleeve longitudinally of the outer sleeve.

[0022] In particular, it can be provided that the inner sleeve has a metal material or a (hard) plastic material, or is made of such a material. Thus, the preferred rigidity of the basic body can be produced by means of the inner sleeve, in particular in the direction of the longitudinal hole of the basic body involved.

[0023] The inner sleeve preferably has a single outer flange or two outer flanges that are opposite each other. If there is a single outer flange, it is either arranged on the side of the inner sleeve facing the bicycle frame or on the side of the inner sleeve facing away from the bicycle frame. Suitably, the outer flange is arranged on the end side of the inner sleeve. Preferably, multiple outer flanges are arranged on the end sides of the inner sleeve that are opposite each other. It can also be provided that the multiple outer flanges or the one outer flange extend radially beyond the inner sleeve and / or completely surround the inner sleeve in the circumferential direction of the inner sleeve. With the help of a correspondingly configured inner sleeve, the first base body can be supported on a section of the bicycle frame facing the first base body and on the shaft step of the step bolt, and optionally, the second base body can be supported on a section of the bicycle frame facing the second base body. However, it is expedient to provide a distance, in particular an air gap, during normal operation of the bicycle between the outer flange of the second base body or of the inner sleeve of the second base body and the section of the bicycle frame facing the second base body.

[0024] In another embodiment of the present invention, the second base body, in particular its outer sleeve, can have axially protruding projections. Advantageously, during normal operation of the bicycle, the second base body is supported on the bicycle frame, in particular on a section of the bicycle frame facing the second base body, via the axially protruding projections. This prevents a gap, in particular an air gap, between the second base body and the bicycle frame. In other words, the axially protruding projections of the second base body provide axial locking relative to the bicycle frame. Advantageously, the first base body does not have axially protruding projections.

[0025] It is also conceivable that the first and second base bodies, i.e., the first and second screw receptacles, can be non-detachably connected or joined to the housing of the drive unit, so that the housing of the drive unit, the first and second base bodies form a coherent, particularly one-piece, structural unit. This can be achieved, in particular, by vulcanizing the base bodies onto the housing of the drive unit. For example, this can be achieved by providing the base bodies and the metal housing of the drive unit, each with an outer sleeve made of a rubber material. If the housing of the drive unit is made of plastic, it is also conceivable to non-detachably connect the base bodies to the housing by gluing. However, it is also possible to provide that the first and second base bodies, i.e., the first and second screw receptacles, are designed to be replaceable. This allows the first and second screw receptacles to be replaced during the service life of the bicycle, and the vibration damping and / or vibration decoupling of the bicycle frame relative to the drive unit achieved by these components can be updated. In the case of an exchangeable design of the base body, it can further be provided that the first base body and the second base body, ie the first screw receiver and the second screw receiver, are pressed into corresponding housing openings of the housing of the drive unit.

[0026] Furthermore, it can be provided that, in the assembled state of the bicycle, at least one base body is elastically compressed along the central axis of the opening and / or the central axis of the bolt and elastically expands radially relative to the central axis of the opening and / or the central axis of the bolt. Preferably, the first base body or the first base body and the second base body are elastically compressed along the central axis of the opening and / or the central axis of the bolt and elastically expands radially relative to the central axis of the opening and / or the central axis of the bolt. Further preferably, the outer sleeve of the first base body, made of a material having vibration damping and / or vibration decoupling properties, in particular rubber, an elastomer, or silicone, and / or the outer sleeve of the second base body, made of a material having vibration damping and / or vibration decoupling properties, in particular rubber, an elastomer, or silicone, are elastically compressed along the central axis of the opening and / or the central axis of the bolt and elastically expands radially relative to the central axis of the opening and / or the central axis of the bolt. This radial expansion allows the base body or bodies to be clamped to the housing of the drive unit. The radial expansion is advantageously achieved by screwing a nut onto the stepped bolt, as described above, and tightening it so that the nut is supported on the bicycle frame and the first base body is clamped between the shank step of the stepped bolt and the housing of the bicycle frame facing the drive unit. Advantageously, the clamping is releasable, since both the axial compression of the base body or base bodies and the radial expansion of the base body or base bodies are purely elastic, i.e., completely or (at least) substantially reversible. This has the advantage that, if necessary, the clamping can be completely canceled, and the drive unit can be released from the bicycle frame in a non-destructive manner.

[0027] The present invention further relates to a bicycle, in particular an electric bicycle or an electric power-assisted bicycle, comprising at least one fastening assembly constructed as described above, a drive unit for driving the bicycle, and a bicycle frame configured to carry the drive unit and a rider. The invention provides that the base bodies of two bolt receptacles are inserted into two opposing housing openings of the drive unit housing, which define a central axis of the opening, such that the base body of the first bolt receptacle is fixed in a torsionally fixed and axially secure manner to the inner circumference of the first housing opening of the housing, facing the central axis of the opening, and the base body of the second bolt receptacle is fixed in a torsionally fixed and axially secure manner to the inner circumference of the second housing opening of the housing, facing the central axis of the opening. Furthermore, the bicycle frame has two opposing frame openings that, when the bicycle is assembled, align with the two housing openings of the drive unit housing. A stepped bolt extends through the two frame openings, the two housing openings, and the longitudinal bore of the bolt receptacle base body, and the stepped bolt is supported by its head in a contacting manner on the bicycle frame. Furthermore, the first base body is supported on the first circular segment, and the second base body is supported on the second circular segment. The nut is screwed onto the threaded section of the stepped bolt and tightened such that the nut is supported on the bicycle frame and the first base body is clamped between the shaft step of the stepped bolt and the bicycle frame. Furthermore, in the assembled state of the bicycle, at least one base body, or alternatively the first and second base bodies, in particular the outer sleeve of the first base body and / or the outer sleeve of the second base body, is elastically compressed along the central axis of the opening and elastically expanded radially with respect to the central axis of the opening. This provides a preferred bicycle having at least one fastening assembly.

[0028] The present invention also provides a preassembled structural unit comprising a drive unit for a bicycle, particularly an electric bicycle or electric assisted bicycle, and at least one fastening assembly constructed as described above. The drive unit has at least one housing opening for fastening or locking the drive unit by means of at least one fastening element, which can be implemented in particular as a stepped bolt. To construct the preassembled structural unit, it is provided that the base of the bolt receptacle of the at least one fastening assembly can be removably inserted or inserted into the at least one housing opening of the drive unit. This provides a preferred preassembled structural unit for a bicycle.

[0029] Further important features and advantages of the invention emerge from the dependent claims, the drawings and the associated description of the figures based on the drawings.

[0030] It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the respectively indicated combination but also in other combinations or alone without departing from the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Preferred embodiments of the invention are shown in the drawings and are explained in more detail in the following description, wherein identical reference numerals refer to identical or similar components or components having the same function.

[0032] The accompanying drawings schematically show:

[0033] Figure 1 A preferred embodiment of the fastening assembly according to the invention is shown in a sectional view in the assembled state.

[0034] Figure 2 A further preferred embodiment of the fastening assembly according to the invention is shown in a sectional view in the assembled state.

[0035] Figure 3 A preferred embodiment of the second screw receiving part of the fastening assembly according to the invention is shown in a perspective view. DETAILED DESCRIPTION

[0036] Figure 1 and 2 A fastening assembly, designated by reference numeral 1a, is shown in each case in a preferred embodiment for a bicycle, designated overall by 1, having a drive unit 2 for driving the bicycle 1 and a bicycle frame 3 for carrying the drive unit 2 and a rider (not shown) of the bicycle 1. The drive unit 2 is a separate component from the bicycle frame 3, so that it is necessary to mount the drive unit 2 on the bicycle frame 3 in a cost-effective and simple manner. Purely by way of example, the drive unit 2 is designed as an electric drive and, in particular, has an electric motor (not shown), which is accommodated in a housing 5 of the drive unit 2, which may be multi-part, in particular a light metal housing. The electric motor is designed to drive a wheel of the bicycle 1, which is also arranged on the bicycle frame 3, in accordance with the rider's needs or predefined requirements.

[0037] The drive unit 2 can be easily mounted on the bicycle frame 3. To this end, the fastening assembly 1a herein includes at least one integral stepped bolt 6 for fastening the drive unit 2 to the bicycle frame 3, which extends along a bolt center axis 11. The stepped bolt 6 has a shank 7 with a threaded section 8 having an external thread, a first, unthreaded circular section 9 arranged on the threaded section 8, and a second, unthreaded circular section 10 arranged on the first circular section 9. The head 13 of the stepped bolt 6 is arranged on the second circular section 10. The threaded section 8 forms the free axial end of the stepped bolt 6 opposite the head 13. Purely by way of example, the threaded section 8 has a thread diameter, the first circular section 9 has a first diameter, and the second circular section 10 has a second diameter. The second diameter of the second circular section 10 is greater than the first diameter of the first circular section 9, and the first diameter of the first circular section 9 is greater than the thread diameter of the threaded section 8. Thus, the shank 7 of the stepped bolt 6 has a stepped feature and, between the first circular segment 9 and the second circular segment 10, a shank step 12 completely circumferentially extending along the bolt's central axis 11. This shank step defines an annular surface, which is perpendicular to the bolt's central axis 11 and faces the free axial end of the stepped bolt 6. A first base body 16, described below, can be supported on this annular surface. Furthermore, a circumferential undercut 35 can be provided between the first circular segment 9 and the threaded segment 8.

[0038] The head 13 of the stepped bolt 6 is arranged in an integral manner on the second circular section 10 of the rod 7. Here, the head diameter of the head 13 is larger than the diameter of the first circular section 9, the diameter of the second circular section 10 and the thread diameter of the threaded section 8.

[0039] In addition, according to Figure 1 The embodiment depicted in FIG provides that the rod 7 of the stepped bolt 6 is realized as a solid rod 36. Figure 2 In the embodiment shown, a constructional variant which is lighter than this is provided, in which the shank 7 of the stepped bolt 6 is realized as a hollow shank 37 with an axial through-hole.

[0040] According to the fastening assembly 1a for the bicycle 1, Figure 1 and 2 In the embodiment shown in FIG, a first screw receiving portion 14 and a second screw receiving portion 17 are additionally provided, wherein the first screw receiving portion has a first hollow cylindrical base body 16 through which a longitudinal hole passes, and the second screw receiving portion has a second hollow cylindrical base body 19 through which a longitudinal hole 18 passes. Figure 1 and 2, it can also be seen that the two base bodies 16, 19 of the two screw receptacles 14, 17 are inserted into two opposite housing openings 21, 22 of the housing 5 of the drive unit 2, which define an opening center axis 20, such that the first base body 16 of the first screw receptacle 14 is fixed in a rotationally fixed and axially fixed manner to an inner circumference 23 of the first housing opening 21 of the housing 5, which faces the opening center axis 20, and the second base body 19 of the second screw receptacle 17 is fixed in a rotationally fixed and axially fixed manner to an inner circumference 24 of the second housing opening 22 of the housing 5, which faces the opening center axis 20, in the housing openings 21, 22 of the housing 5. The rotationally fixed and axial fixing is achieved, for example, by pressing the two base bodies 16, 19 into place during insertion into the housing 5.

[0041] The bicycle frame 3 has two frame openings 25 and 26 that are opposite to each other. Figure 1 and Figure 2 In the assembled state 4 shown in FIG, the two frame openings are aligned with the two housing openings 21, 22 of the housing 5 of the drive unit 2, since the drive unit 2 is positioned with its housing openings 21, 22 in sections between two parallel housing legs of the housing 5, in which the housing openings 21, 22 of the housing 5 are arranged. In other words, the frame openings 25, 26 mark corresponding fastening points, to which the drive unit 2 is fastened or can be fastened.

[0042] Furthermore, the stepped bolt 6 is provided through the two frame openings 25, 26, the two housing openings 21, 22, and the longitudinal bores 15, 18 of the two base bodies 16, 19 of the bolt receptacles 14, 17. At one end, the head 13 of the stepped bolt is supported in contact with the bicycle frame 3, while at the other end, the free axial end of the stepped bolt 6 is disposed in one of the housing openings 21, 22 and / or projects beyond the housing 5. The bolt center axis 11 and the opening center axis 20 are oriented parallel to and coincide with each other. Furthermore, it can be seen that the first base body 16 is supported in a first sliding seat 31 on the first circular segment 9, and the second base body 19 is supported in a second sliding seat 32 on the second circular segment 10. This allows the first and second base bodies 16, 19, and the stepped bolt 6 to be independently adjusted relative to each other along the bolt center axis 11 and / or the opening center axis 20, at least as long as the nut 27 is not tightened. To finally secure the drive unit 2 to the bicycle frame 3, the nut 27 is provided. This nut is screwed onto the threaded section 8 of the stepped bolt 6 and subsequently tightened so that the nut 27 rests in a supporting manner on the outer side of the bicycle frame 3, pointing away from the drive unit 2. The first base body 16 is thus clamped axially between the shank step 12 of the stepped bolt 6 and the bicycle frame 3. As a result, the first base body 16 is no longer adjustable along the bolt center axis 11 and / or the opening center axis 20. The second base body 19 is not clamped axially, so that it retains a certain longitudinal adjustability in the direction of the bolt center axis 11 and / or the opening center axis 20. This ensures that the first base body 16 absorbs both the axial force 34 and the radial force 33, while the second base body 19 absorbs only the radial force 33, i.e., with negligible frictional effects.

[0043] In addition, according to Figure 1 The embodiment depicted in FIG. 1 provides for the nut 27 to be implemented as an eccentric nut 29 or as an eccentric cap nut 28, so to speak, a cap-shaped eccentric nut. The bicycle frame 3 has a housing receiving section 38 designed complementarily to the eccentric nuts 28, 29. In the assembled state 4 of the fastening assembly 1a, the eccentric nuts 28, 29 are recessed into this housing receiving section and supported against it to prevent unintentional opening movements of the eccentric nuts 28, 29, which could be caused by vibrations occurring during normal operation of the bicycle 1. In the present case, the eccentric nuts 28, 29 are designed so that they are recessed sectionally into the housing receiving section 38, with the head section of the eccentric nuts 28, 29 projecting beyond the outside of the bicycle frame 3. The eccentric nuts 28, 29 have an opening 30 that extends only sectionally, i.e., not completely, through the eccentric nuts 28, 29.

[0044] In addition, according to Figure 2The embodiment shown in FIG2 provides that the nut 27 is realized as a commercially common, symmetrical nut 27 having a through-opening 30. The through-opening 30 completely passes through the nut 27. In this case, a commercially common screw locking device (not shown) can be used to lock the screw connection against accidental loosening.

[0045] According to the fastening component 1 Figure 1 and 2 In the embodiment depicted in , it is further provided that the first base body 16 and the second base body 19 each have an outer sleeve 39 and an inner sleeve 40, wherein the inner sleeve 40 is fixed to the outer sleeve 39 and the inner sleeve 40 is coaxially received inside the outer sleeve 39. In the present case, the outer sleeve 39 is manufactured from a material having vibration damping and / or vibration decoupling properties and is provided for vibration decoupling the bicycle frame 3 relative to the drive unit 2. As a result, during normal operation of the bicycle 1, vibrations occurring on the drive unit 2 are not transmitted to the bicycle frame 3 and vice versa. In addition, the outer sleeve 39 can each have an anti-rotation device 41, by means of which the corresponding base body 16, 19 can be fixed in a rotationally fixed manner or in the corresponding housing opening 21, 22. In the present case, the inner sleeve 40 is manufactured from a metal material or a (hard) plastic material. In addition, according to Figure 1 In the embodiment shown in FIG, the inner sleeve 40 has two outer flanges 42, 43 opposite to each other, but in contrast, Figure 2 In the embodiment shown in FIG, the inner sleeve 40 has only one outer flange 42, which is arranged on the side facing the bicycle frame 3. Figure 2 The embodiment also has two outer flanges 42, 43 facing each other. In addition, it can be considered that Figure 2 The outer flanges 42 , 43 are each arranged on a side facing away from the bicycle frame 3 .

[0046] It should also be mentioned that it can be additionally provided that, in the assembled state 4 of the bicycle 1 , the outer sleeve 39 of the first base body 16 and / or the outer sleeve 39 of the second base body 19 is elastically compressed along the opening center axis 20 and elastically expanded radially relative to the opening center axis 20 .

[0047] Figure 3In a preferred embodiment, the second screw receptacle 17 is shown with a second base body 19. In this embodiment, the second base body 19, in particular its outer sleeve 39, has a plurality of axially protruding, evenly distributed projections 39a. During normal operation of the bicycle 1, the second base body 19 can be supported on the bicycle frame 3 via the axially protruding projections 39a. For example, the projections 39a can be integrally formed with the outer sleeve 39 and can have a cylindrical, in particular, circular cylindrical, projection body.

Claims

1. A fastening assembly (1a) for a bicycle (1), in particular an electric bicycle or an electric power-assisted bicycle, the fastening assembly being used to fasten a drive unit (2) of the bicycle (1) to a bicycle frame (3) of the bicycle (1), the fastening assembly comprising: - a stepped bolt (6) comprising a shank (7) and a head (13), the shank comprising a threaded section (8), a first circular section (9) without thread arranged on the threaded section (8), a second circular section (10) without thread arranged on the first circular section (9), and a circumferential shank step (12) arranged between the first circular section (9) and the second circular section (10), the head being arranged on the second circular section (10) of the shank (7); - a nut (27); a first screw receptacle (14) having a hollow-cylindrical base body (16) through which a longitudinal hole (15) passes; and a second screw receptacle (17) having a hollow-cylindrical base body (19) through which a longitudinal hole (18) passes, - wherein the base bodies (16, 19) of the two screw receiving parts (14, 17) can be inserted or inserted into two housing openings (21, 22) of the housing (5) of the drive unit (2) that are opposite to each other and define the opening center axis (20) so that the base body (16) of the first screw receiving part (14) can be fixed or fixed in a torsionally fixed and axially fixed manner on the inner peripheral edge (23) of the first housing opening (21) of the housing (5) facing the opening center axis (20) and the base body (19) of the second screw receiving part (17) can be fixed or fixed in a torsionally fixed and axially fixed manner on the inner peripheral edge (24) of the second housing opening (22) of the housing (5) facing the opening center axis (20), - wherein the stepped bolt (6) can be passed through or through two mutually opposite frame openings (25, 26) of the bicycle frame (3), the two housing openings (21, 22) and the longitudinal hole (15, 18) of the base body (16, 19) of the bolt receiving portion (14, 17), the two frame openings being aligned with the two housing openings (21, 22) of the housing (5) of the drive unit (2) in the assembled state (4) of the bicycle (1), and the stepped bolt can be supported or supported on the bicycle frame (3) with its head (13) in a contacting manner, wherein the first base body (16) can be supported on or is supported on the first circular section (9), - wherein a second base body (19) can be supported on or is supported on said second circular segment (10), and - wherein the nut (27) can be screwed onto or screwed onto the threaded section (8) of the stepped bolt (6) and can be tightened or tightened in such a way that the nut (27) can be supported or supported on the bicycle frame (3) and the first base body (16) can be clamped or clamped between the rod step (12) of the stepped bolt (6) and the bicycle frame (3).

2. The fastening assembly (1a) according to claim 1, It is characterized in that The second base body (19) is supported on the second circular section (10) in a sliding seat (32) or in a second sliding seat (32).

3. The fastening assembly (1a) according to claim 1 or 2, It is characterized in that The second base body (19) absorbs only or substantially only radial forces (33).

4. Fastening assembly (1a) according to any one of the preceding claims, It is characterized in that The first base body (16) is supported on the first circular section (9) in a sliding seat (31) or in a first sliding seat (31).

5. Fastening assembly (1a) according to any one of the preceding claims, It is characterized in that During normal operation of the bicycle (1), the first base body and / or the second base body (16, 19) absorb both axial forces (34) and radial forces (33).

6. Fastening assembly (1a) according to any one of the preceding claims, It is characterized in that - the threaded segment (8) has a thread diameter, the first circular segment (9) has a first diameter, and the second circular segment (10) has a second diameter, wherein the second diameter of the second circular segment (10) is greater than the first diameter of the first circular segment (9), and / or the first diameter of the first circular segment (9) is greater than or equal to the thread diameter of the threaded segment (8).

7. Fastening assembly (1a) according to any one of the preceding claims, It is characterized in that The shank (7) of the stepped bolt (6) is realized as a solid shank (36) or as a hollow shank (37).

8. Fastening assembly (1a) according to any one of the preceding claims, It is characterized in that The nut ( 27 ) is realized as a cap nut ( 29 ) or as a nut ( 27 ) with a through-opening ( 30 ).

9. Fastening assembly (1a) according to any one of the preceding claims, It is characterized in that The nut (27) is realized as a concentric nut or as an eccentric nut (28).

10. Fastening assembly (1a) according to any one of the preceding claims, It is characterized in that The first base body (16) and the second base body (19) each have an outer sleeve (39) and an inner sleeve (40), wherein the inner sleeve (40) is fixed to the outer sleeve (39) and is coaxially received inside the outer sleeve (39).

11. The fastening assembly (1a) according to claim 10, It is characterized in that - the outer sleeve (39) is made of rubber material or elastomer or silicone, or - the outer sleeve (39) is made of a mixture of different rubber materials, or - The outer sleeve (39) is made of a mixture of different rubber materials and metal or metal mesh or one or more metal alloys or other similar materials.

12. Fastening assembly (1a) according to claim 10 or 11, It is characterized in that The inner sleeve (40) has a single outer flange or two outer flanges (42, 43) lying opposite one another.

13. Fastening assembly (1a) according to any one of claims 10 to 12, It is characterized in that -In the assembled state (4) of the fastening assembly (1a), at least one base body (16, 19) or the first base body (16) and the second base body (19), in particular the outer sleeve (39) of the first base body (16) and / or the outer sleeve (40) of the second base body (19) are elastically compressed along the central axis (20) of the opening and elastically expand radially with respect to the central axis (20) of the opening.

14. A bicycle (1), in particular an electric bicycle or an electric power-assisted bicycle, - the bicycle has at least one fastening assembly (1a) configured according to any one of the preceding claims 1 to 13, The bicycle comprises a drive unit (2) for driving the bicycle (1) and a bicycle frame (3), the bicycle frame being configured to carry the drive unit (2) and a rider, -in, The base bodies (16, 19) of the two bolt receiving parts (14, 17) are inserted into two mutually opposite housing openings (21, 22) of the housing (5) of the drive unit (2) which define an opening center axis (20) so that the base body (16) of the first bolt receiving part (14) is fixed in a torsionally fixed and axially fixed manner to the inner peripheral edge (23) of the first housing opening (21) of the housing (5) facing the opening center axis (20) in the housing openings (21, 22) of the housing (5), and the base body (19) of the second bolt receiving part (17) is fixed in a torsionally fixed and axially fixed manner to the inner peripheral edge (24) of the second housing opening (22) of the housing (5) facing the opening center axis (20), in the housing openings (21, 22) of the housing (5). wherein the bicycle frame (3) has two frame openings (25, 26) lying opposite one another, which, in the assembled state (4) of the bicycle (1), are aligned with two housing openings (21, 22) of the housing (5) of the drive unit (2), - wherein the stepped bolt (6) passes through the two frame openings (25, 26), the two housing openings (21, 22) and the longitudinal hole (15, 18) of the base (16, 19) of the bolt receiving portion (14, 17), and the stepped bolt is supported on the bicycle frame (3) by its head (13) in a contacting manner, - wherein the first base body (16) is supported on the first circular segment (9), - wherein the second base body (19) is supported on the second circular segment (10), wherein the nut (27) is screwed onto the threaded section (8) of the stepped bolt (6) and tightened in such a way that the nut (27) is supported on the bicycle frame (3) and the first base body (16) is clamped between the rod step (12) of the stepped bolt (6) and the bicycle frame (3), and - wherein, in the assembled state (4) of the bicycle (1), at least one base body (16, 19) or the first base body (16) and the second base body (19), in particular the outer sleeve (39) of the first base body (16) and / or the outer sleeve (40) of the second base body (19) are elastically compressed along the opening center axis (20) and elastically expand radially with respect to the opening center axis (20).

15. A preassembled structural unit comprising: - a drive unit (2) for a bicycle (1), in particular an electric bicycle or an electric assisted bicycle, the drive unit having at least one housing opening (21, 22) for fastening or locking the drive unit (2) by means of at least one fastening element, in particular a stepped bolt (6); and - at least one fastening assembly (1a) according to any one of claims 1 to 13, - wherein, in order to construct the preassembled structural unit, the screw receiving part (14, 17) of the at least one fastening component (1a) or the base body (16, 19) of the screw receiving part (14, 17) can be inserted or inserted into at least one housing opening (21, 22) of the drive unit (2) in a removable manner.

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