Fitting device for bicycle, bicycle including such the fitting device, and preliminarily assembled component unit

Abstract

To provide a fitting device for a bicycle that enables sufficient vibration damping and / or vibration insulation.SOLUTION: A fitting device (1a) for a bicycle (1), especially, an electric bicycle or power-assisted bicycle includes: at least one stepped screw (6) for fitting a drive unit (2) to a bicycle frame (3); a first screw receiving part (14) with a hollow cylindrical substrate (16) penetrated by a longitudinal hole (15); and a second screw receiving part (17) with a hollow cylindrical substrate (19) penetrated by a longitudinal hole (18). In the fitting device (1a), both substrates (16, 19) of the screw receiving parts (14, 17) can be or is inserted into two casing openings (21, 22) opposite to each other of a casing (5) of the drive unit (2).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a mounting device for a bicycle, in particular an electric bicycle or a pedestrian-assisted bicycle, according to the subject matter of claim 1. The invention particularly relates to a bicycle with such a mounting device, and also to a pre-assembled construction unit.

[0002] Various mounting devices are currently used for attaching the bicycle's drive motor to the bicycle frame in bicycles of the above-mentioned type; see, for example, WO 2022 / 043182, which describes exemplary mounting devices. Known mounting devices have the disadvantage of being costly and laborious to assemble, particularly due to the large number of components. Furthermore, there is a need for the mounting device to provide sufficient vibration damping so that vibrations emanating from the drive motor are not transmitted to the frame, and so that vibrations of the frame, which are generated by external excitation of the frame during bicycle travel, are not transmitted to the drive unit.

[0003] It is therefore an object of the present invention to provide an embodiment that improves upon the above-mentioned drawbacks, or at least one alternative embodiment of a mounting device for a bicycle, which allows for a relatively simple assembly of the bicycle drive unit and bicycle frame, yet still provides sufficient vibration damping and / or vibration isolation. It would also be desirable to provide a bicycle with such a mounting device, as well as a pre-assembled component unit.

[0004] According to the present invention, this problem is solved 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 mounting device for a bicycle, in particular an electric bicycle or a pedestrian-assisted bicycle, which has fewer components than known mounting devices and / or allows for more sufficient vibration damping and / or vibration isolation.

[0006] To this end, the present invention proposes a mounting device for a bicycle, in particular an electric bicycle or an electrically assisted bicycle, comprising a shoulder screw for mounting a drive unit to a bicycle frame of a bicycle, the shoulder screw comprising a shaft with a threaded portion, a first circular portion without a thread disposed on the threaded portion, a second circular portion without a thread disposed on the first circular portion, and an annular shaft shoulder centered on the central axis of the shoulder screw and disposed between the first and second circular portions, and a head disposed on the second circular portion of the shaft, wherein the threaded portion advantageously forms or has a free threaded end of the shoulder screw opposite the head and a nut. It is further specified that the mounting device comprises a first screw receiving part having a hollow tubular base body pierced by a longitudinal bore and a second screw receiving part having a hollow tubular base body pierced by a longitudinal bore, the base bodies of the screw receiving parts being insertable or being inserted into two opposing casing openings of a casing of a bicycle drive unit, the casing defining a common central opening axis, wherein the base body of the first screw receiving part, also referred to herein as the first base body, is fixable or is fixed to an inner circumferential surface of the first of the casing openings, facing the opening central axis, and the base body of the second screw receiving part, also referred to herein as the second base body, is fixable or is fixed to an inner circumferential surface of the second of the casing openings, facing the opening central axis, so as to be non-rotatable and axially immovable. It is furthermore advantageous if the bicycle frame has two opposing frame openings that are aligned with the casing openings of the drive unit casing when the bicycle is assembled.It is further specified that shoulder screws can be or are inserted through the frame openings, the casing openings, and the longitudinal bore of the base of the screw receiving part, and that the head of the shoulder screw can or is supported in contact with the bicycle frame.Additionally, an intermediate element, in particular a washer, made of metal, plastic or other (elastic) material may be arranged between the head of the shoulder screw and the bicycle frame. Furthermore, the first base body can be supported or supported on the first circular part, the second base body can be supported or supported on the second circular part, and the nut described above can be screwed or screwed onto the threaded part of the shoulder screw, and the nut can be supported or supported on the bicycle frame and can be fastened or tightened so that the first base body can be fixedly clamped or fastened between the shank shoulder of the shoulder screw and the bicycle frame. In this case, it will be immediately clear to those skilled in the art that the threaded part of the shoulder screw in this case has an external thread that is complementary to the internal thread of the nut, so that the external thread and the internal thread are thread-compatible with each other.

[0007] This allows the drive unit and the bicycle frame to be assembled together relatively easily and inexpensively, and the drive unit can be removed from the bicycle frame relatively quickly and inexpensively by removing the nut from the shoulder screw and pulling the shoulder screw out of the frame opening, both casing openings, and the longitudinal hole in the base of the screw receiving part.

[0008] Advantageously, it may be specified that the second base body is supported on the second circular portion by a slip fit, in particular by a second slip fit, in other words directly on the shoulder screw, whereby the shoulder screw can be inserted into or is inserted into the longitudinal hole of the second base body and can be aligned relative to the second base body, in particular along the opening central axis, when assembling the drive unit to the bicycle frame.

[0009] In this case, it may be specified that the second base body absorbs exclusively or (at least) substantially exclusively the radial forces. Furthermore, the second base body may be provided between the head of the shoulder screw and the shank shoulder of the shoulder screw.

[0010] It may further be specified that, for example, during a given operation of the bicycle, the first base body is supported on the first circular portion by a snug fit, in particular by a first snug fit, i.e., the first base body is supported directly on the shoulder screw, whereby the shoulder screw can be inserted or is inserted into the longitudinal hole of the first base body and can be aligned relative to the first base body, in particular along the opening central axis, when the drive unit is assembled to the bicycle frame.

[0011] In this case, it may be specified that during a given operation of the bicycle, the first base body and / or the second base body absorb both axial and radial forces.

[0012] Furthermore, a further step, in particular an annular undercut, may be arranged between the first circular portion and the threaded portion.

[0013] It may further be specified that the threaded portion has a thread diameter, the first circular portion has a first diameter, and the second circular portion has a second diameter, the second diameter of the second circular portion being larger than the first diameter of the first circular portion and / or the first diameter of the first circular portion being larger than or equal to the thread diameter of the threaded portion. This provides an advantageous embodiment of a shoulder screw that ensures simple and fast assembly of the drive unit in the bicycle frame. This is advantageous because the first circular portion preferably has a smaller diameter than the second circular portion, thereby resulting in an inner sleeve of the first base body having a smaller inner diameter than the inner sleeve of the second base body. In other words, the outer sleeve of the first base body is larger in size than the outer sleeve of the second base body. Alternatively or additionally, the inner sleeve of the first base body may be correspondingly larger in size than the inner sleeve of the second base body. A larger dimensioned inner sleeve of the first base body has the advantage that this inner sleeve can absorb correspondingly larger axial and / or radial forces.

[0014] Advantageously, the shaft of the shoulder screw may be realized as a solid shaft or as a hollow shaft. In this case, the solid shaft in particular does not have or (at least) substantially does not have a cavity. The hollow shaft may be pierced by a through-hole extending over the entire length of the shaft along the central thread axis of the shoulder screw. In this case, the aforementioned through-hole may also completely axially extend through the head of the shoulder screw. A solid shaft, in the sense of the present invention, advantageously does not have a through-hole extending over the entire length of the shaft along the central thread axis. The head of a shoulder screw with a solid shaft may have a tool-receiving opening for inserting an operating tool, which extends partially or completely through the head along the central thread axis.

[0015] It may also be specified that the nut is realized as a cap nut or as a nut with a through-hole. In this case, the cap nut in particular has an opening with an internal thread, which does not pass through the head part of the cap nut. In nuts with a through-hole, the opening passes completely through the nut. In both cap nuts and nuts with a through-hole, the internal thread may extend completely or only partially along the opening or through-hole.

[0016] An "opening" in the sense of the present invention is in particular a recess, and more particularly a hole.

[0017] It may also be specified that the nut is realized as a concentric nut or as an eccentric nut. The eccentric nut, which can be provided in large quantities and at low cost, can prevent the eccentric nut from undesirably opening due to vibrations / jolts that occur during the normal operation of the bicycle. In this case, the bicycle frame of the bicycle may have a casing receiving part that is formed complementary to the eccentric nut, in which the eccentric nut is received in the assembled state of the bicycle and in which the eccentric nut is supported against opening.

[0018] It may further be specified that the nut or eccentric nut is accommodated in the bicycle frame, in particular in a casing accommodation portion of the bicycle frame that is configured complementarily to the nut or eccentric nut, such that the nut or eccentric nut is at least partially or completely inserted into the casing accommodation portion, so that the nut or eccentric nut does not protrude, or only partially protrudes, beyond the surface of the bicycle frame, thereby preventing injury or damage.

[0019] In particular, it may be specified that the first and second base bodies each have an outer sleeve and an inner sleeve, the inner sleeve being fixed to the outer sleeve and the inner sleeve being housed coaxially inside the outer sleeve, so that the base bodies have, so to speak, different layers, by means of which the mechanical properties, in particular the damping and / or stiffness properties, of the base body can be adapted within predetermined ranges to the events occurring during a given bicycle ride.

[0020] In this case, the outer sleeve may be specified to have or be made of a material with vibration-damping and / or vibration-insulating properties and configured to damp and / or insulate the bicycle frame from the drive unit. Suitable materials with vibration-damping and / or vibration-insulating properties may be, for example, rubber materials, elastomers, or silicone. The outer sleeve may also be made of a mixture of various rubber materials or a mixture of various rubber materials with metal, metal mesh, metal alloys, or other similar materials. A suitably configured screw receptacle can provide advantageous vibration isolation of the bicycle frame from the drive unit, so that vibrations resulting from the operation of the drive unit are effectively not transmitted to the bicycle frame, and vice versa. This significantly improves the comfort experienced by the cyclist when handling the bicycle, especially while riding. Materials with vibration-damping and / or vibration-insulating properties can be selected so that vibrations of a predetermined frequency are damped.

[0021] Furthermore, the outer sleeve may have an anti-rotation device by means of which the respective base bodies can or are fixed in the respective casing openings so that they cannot rotate relative to one another. The anti-rotation device may, for example, be formed by or have a longitudinal protrusion. The longitudinal protrusion may advantageously extend longitudinally on the outside of the outer sleeve and over the outer surface of the outer sleeve. In this case, it is advantageous if the longitudinal protrusion of the anti-rotation device can or is arranged in at least one longitudinal groove of the casing of the drive unit, which is arranged in one of the aforementioned casing openings of the casing. Alternatively or additionally, the reverse solution is also conceivable, in which the longitudinal protrusion is arranged in one of the aforementioned casing openings of the casing and the outer sleeve has a longitudinal groove forming an anti-rotation device, for example, extending longitudinally on the outside of the outer sleeve and over the outer surface of the outer sleeve.

[0022] In particular, it may be specified that the inner sleeve comprises or is made of a metallic or (hard) plastic material, so that it can generate a suitable stiffness of the base body, in particular in the direction of the longitudinal bore of the base body in question.

[0023] It is advantageous if the inner sleeve has only one or two opposing outer flanges. If only one outer flange is present, this outer flange is 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. The outer flange is advantageously arranged on an end surface of the inner sleeve. The outer flanges are preferably arranged on opposite end surfaces of the inner sleeve. Furthermore, it may be specified that the outer flanges in this case protrude radially beyond the inner sleeve and / or completely surround the inner sleeve in the circumferential direction of the inner sleeve. A correspondingly configured inner sleeve can support the first base body on the part of the bicycle frame facing the first base body and the axial shoulder of the shoulder screw, and optionally the second base body on the part of the bicycle frame facing the second base body. However, it is advantageous that a distance, in particular an air gap, is adjusted between the second base body or the outer flange of the inner sleeve of the second base body and the part of the bicycle frame facing the second base body during a given bicycle operation.

[0024] In another embodiment of the present invention, it may be specified that the second base body, in particular its outer sleeve, has an axially protruding protrusion. Advantageously, during a given bicycle operation, the second base body is supported via the axially protruding protrusion on the bicycle frame, in particular on a portion of the bicycle frame facing the second base body. This prevents a gap, in particular an air gap, between the second base body and the bicycle frame. In other words, the axially protruding protrusion of the second base body provides axial fixation to the bicycle frame. In this case, it is advantageous if the first base body does not have an axially protruding protrusion.

[0025] It is further conceivable that the first and second base bodies, i.e., the first and second screw receiving portions, can be permanently connected to the drive unit casing, so that the drive unit casing, the first and second base bodies form a single, integrated, and particularly integral, structural unit. This can be achieved, in particular, by vulcanizing the base bodies to the drive unit casing. For example, in this case, the base bodies are provided with outer sleeves made of rubber material, and the drive unit casing is made of metal. Even if the drive unit casing is made of plastic, the base bodies are permanently bonded to this casing by adhesive. However, it is also possible for the first and second base bodies, i.e., the first and second screw receiving portions, to be interchangeable. This allows the first and second screw receiving portions to be replaced during the life of the bicycle, thereby updating the vibration damping and vibration isolation of the bicycle frame with respect to the drive unit provided by this component.In the case of replaceable base bodies, it may further be specified that the first and second base bodies, i.e. the first and second screw receiving portions, are press-fit into respective casing openings in the casing of the drive unit.

[0026] Furthermore, it may be specified 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 screw and elastically expanded in the radial direction with respect to the central axis of the opening and / or the central axis of the screw. 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 screw and elastically expanded in the radial direction with respect to the central axis of the opening and / or the central axis of the screw. More preferably, the outer sleeve of the first base body, made of a material with vibration-damping and / or vibration-insulating properties, in particular rubber, elastomer, or silicone, and / or the outer sleeve of the second base body, made of a material with vibration-damping and / or vibration-insulating properties, in particular rubber, elastomer, or silicone, may be elastically compressed along the central axis of the opening and / or the central axis of the screw and elastically expanded in the radial direction with respect to the central axis of the opening and / or the central axis of the screw. The radial expansion allows the base body to be fixedly clamped to the casing of the drive unit. Radial expansion is preferably achieved by threading a nut onto the shoulder screw and tightening it, as described above, so that the nut is supported on the bicycle frame and the first base body is fixedly clamped between the axial shoulder of the shoulder screw and the part of the bicycle frame facing the casing of the drive unit. In this case, the clamp is preferably releasable, since both the axial compression of the base body and the radial expansion of the base body are of a purely elastic nature, i.e., fully reversible or (at least) substantially reversible. This has the advantage that the clamp can be completely released when necessary, allowing the drive unit to be disassembled without destruction.

[0027] The present invention also relates to a bicycle, in particular an electric or electrically assisted bicycle, having at least one mounting device configured according to the above description, a drive unit for driving the bicycle, and a bicycle frame configured to support the drive unit and a rider, wherein the base bodies of the screw receiving parts are inserted into two opposing casing openings of the drive unit's casing, the opening central axes of the openings being defined, and wherein the base body of the first screw receiving part is fixed non-rotatably and axially immovable to an inner circumferential surface of the first of the casing openings facing the opening central axis, and the base body of the second screw receiving part is fixed non-rotatably and axially immovable to an inner circumferential surface of the second of the casing openings facing the opening central axis. The bicycle frame has two opposing frame openings that are aligned with the casing openings of the drive unit casing when the bicycle is assembled, and a shoulder screw is inserted through the frame openings, the casing openings, and the longitudinal hole in the base of the screw receiving portion, with the head of the shoulder screw supported in contact with the bicycle frame. The first base is supported on the first circular portion, and the second base is supported on the second circular portion. The nut is threaded onto the threaded portion of the shoulder screw, and the nut is supported on the bicycle frame and tightened so that the first base is fixedly clamped between the shank shoulder of the shoulder screw and the bicycle frame. When the bicycle is assembled, at least one base, or alternatively the first base and the second base, particularly the outer sleeve of the first base and / or the outer sleeve of the second base, is elastically compressed along the central axis of the openings and elastically expanded in a radial direction relative to the central axis of the openings. This provides a suitable bicycle with at least one mounting device.

[0028] The present invention further proposes a pre-assembled structural unit for a bicycle, in particular an electric bicycle or a power-assisted bicycle, comprising a drive unit and at least one mounting device according to the above description. The drive unit has at least one casing opening for mounting or fastening the drive unit by means of at least one mounting device, which can in particular be realized by a shoulder screw. It is specified that to form the pre-assembled structural unit, a base body of a screw receiving part of the at least one mounting device is insertable or has been inserted into the at least one casing opening of the drive unit. This provides a suitable pre-assembled structural unit for a bicycle.

[0029] Further important features and advantages of the invention are set out in the dependent claims, the drawings and the corresponding description of the drawings based on the drawings.

[0030] It is to be understood that the features mentioned above and those further described below can be used not only in the respective combinations described, but also in other combinations or alone without departing from the scope of the invention.

[0031] Preferred embodiments of the present invention are illustrated in the drawings and explained in detail in the following description, where the same reference numerals are used to refer to the same or similar or functionally identical components.

[0032] The figures are each diagrammatic. [Brief explanation of the drawings]

[0033] [Figure 1] 1 is a cross-sectional view of a preferred embodiment of a mounting device according to the present invention in an assembled state; [Figure 2] 10 is a cross-sectional view of another preferred embodiment of the mounting device according to the present invention in an assembled state. [Figure 3] 1 is a perspective view of a preferred embodiment of a second screw receiving portion of a mounting device according to the present invention;

[0034] 1 and 2 show, in preferred embodiments, a mounting device, designated 1a, for a bicycle, designated generally by the reference numeral 1, which bicycle has a drive unit 2 for driving the bicycle 1 and a bicycle frame 3 for supporting the drive unit 2 and a rider (not shown) of the bicycle 1, the drive unit 2 being a separate component with respect to the bicycle frame 3, which necessitates an inexpensive and simple assembly of the drive unit 2 to the bicycle frame 3. The drive unit 2 is in this case configured, purely by way of example, as an electric drive and in particular has an electric motor (not shown) mounted in a possibly multi-part casing 5, in particular a light metal casing, of the drive unit 2, which is adapted to drive the wheels of the bicycle 1, which is also arranged on the bicycle frame 3, according to the rider's requirements or settings.

[0035] The drive unit 2 can be easily assembled to the bicycle frame 3. To this end, the mounting device 1a has at least one integral shoulder screw 6 extending along a central screw axis 11 for attaching the drive unit 2 to the bicycle frame 3. The shoulder screw 6 has a shaft 7 having a threaded portion 8 with an external thread, a first circular portion 9 without a thread disposed on the threaded portion 8, and a second circular portion 10 without a thread disposed on the first circular portion 9. A head 13 of the shoulder screw 6 is disposed on the second circular portion 10. In this case, the threaded portion 8 forms the axially free end of the shoulder screw 6 opposite the head 13. By way of example only, it is specified that the threaded portion 8 has a thread diameter, the first circular portion 9 has a first diameter, and the second circular portion 10 has a second diameter, the second diameter of the second circular portion 10 being larger than the first diameter of the first circular portion 9, which in turn is larger than the thread diameter of the threaded portion 8. The shaft 7 of the shoulder screw 6 thereby has a stepped characteristic, with a shaft step 12 between the first circular portion 9 and the second circular portion 10, which is completely annular with respect to the thread central axis 11, and which shaft step defines a ring surface facing the free axial end of the shoulder screw 6, perpendicular to the thread central axis 11, on which a first base body 16, described in more detail below, can be supported. Furthermore, an annular undercut 35 may be provided between the first circular portion 9 and the threaded portion 8.

[0036] The head 13 of the shoulder screw 6 is integrally arranged on the second circular portion 10 of the shaft 7. In this case, the head diameter of the head 13 is larger than the diameter of the first circular portion 9, the diameter of the second circular portion 10, and the thread diameter of the threaded portion 8.

[0037] Furthermore, it is specified in the embodiment shown in Figure 1 that the shaft 7 of the shoulder screw 6 is realized as a solid shaft 36. A slightly different construction is specified in the embodiment shown in Figure 2, in which the shaft 7 of the shoulder screw 6 is realized as a hollow shaft 37 with an axial through-bore.

[0038] According to the embodiment shown in Figures 1 and 2 of the mounting device 1a for a bicycle 1, there is further provided a first screw receiving part 14 having a hollow cylindrical first base body 16 pierced by a longitudinal hole 15, and a second screw receiving part 17 having a hollow cylindrical second base body 19 pierced by a longitudinal hole 18. As can be further seen from Figures 1 and 2, the two base bodies 16, 19 of the two screw receiving portions 14, 17 are inserted into two opposing casing openings 21, 22 of the casing 5 of the drive unit 2, which define an opening central axis 20, and in this case the first base body 16 of the first screw receiving portion 14 is fixed to an inner circumferential surface 23 of the first casing opening 21 of the casing openings 21, 22 of the casing 5, facing the opening central axis 20, so as to be non-rotatable relative to the casing 5 and immovable axially, and the second base body 19 of the second screw receiving portion 17 is fixed to an inner circumferential surface 24 of the second casing opening 22 of the casing 5, facing the opening central axis 20, so as to be non-rotatable relative to the casing 5 and immovable axially. In this case, the above-mentioned fixing so as to be unable to rotate relative to each other and to be immovable in the axial direction is realized, for example, by press-fitting the above-mentioned two base bodies 16 and 19 when they are inserted into the casing 5.

[0039] The bicycle frame 3 has two frame openings 25, 26 facing each other, which, in the assembled state 4 of the mounting device 1a shown in Figures 1 and 2, are aligned with the casing openings 21, 22 of the casing 5 of the drive unit 2, since the casing openings 21, 22 of the drive unit 2 are positioned in certain parts between two parallel casing legs of the casing 5, within which the above-mentioned casing openings 21, 22 of the casing 5 are respectively located. Or, in other words, the frame openings 25, 26 mark the respective mounting points at which the drive unit 2 is or can be correspondingly mounted.

[0040] Furthermore, the shoulder screw 6 is inserted through both frame openings 25, 26, both casing openings 21, 22 and the longitudinal holes 15, 18 in both base bodies 16, 19 of the screw receiving parts 14, 17, with the head 13 of the screw bearing against the bicycle frame 3 at one end and the free axial end of the shoulder screw 6 located in one of the casing openings 21, 22 and / or protruding beyond the casing 5 at the other end. The screw central axis 11 and the opening central axis 20 are oriented parallel to and congruent with each other. Furthermore, the first base body 16 is supported on the first circular portion 9 by a first sliding fit portion 31, and the second base body 19 is supported on the second circular portion 10 by a second sliding fit portion 32, so that the first base body 16, the second base body 19, and the shoulder screw 6 are independently adjustable relative to one another along the screw central axis 11 and / or the opening central axis 20, at least as long as the nut 27 is not tightened. For final attachment of the drive unit 2 to the bicycle frame 3, the above-mentioned nut 27 is provided, which is screwed onto the threaded portion 8 of the shoulder screw 6, and in this case, the nut 27 is tightened so that the nut 27 bears against and contacts the outer surface of the bicycle frame 3 opposite the drive unit 2, and the first base body 16 is axially fixedly clamped between the axle shoulder portion 12 of the shoulder screw 6 and the bicycle frame 3. As a result, the first base body 16 is no longer adjustable along the screw central axis 11 and / or the opening central axis 20. Since the second base body 19 is not fixedly clamped in the axial direction, it maintains a certain length adjustability in the direction of the screw central axis 11 and / or the opening central axis 20. This achieves in particular that the first base body 16 absorbs both the axial force 34 and the radial force 33, whereas the second base body 19 absorbs exclusively the radial force 33, i.e., with negligible frictional effects.

[0041] 1 further specifies that the nut 27 is realized as an eccentric nut 29 or as an eccentric cap nut 28, a so-called cap eccentric nut. In this case, the bicycle frame 3 has a casing receiving portion 38 that is configured complementarily with respect to the eccentric nuts 28, 29, into which the eccentric nuts 28, 29 are received in the assembled state 4 of the mounting device 1a and where they are supported against unintended opening movements of the eccentric nuts 28, 29, possibly induced by vibrations resulting from the normal operation of the bicycle 1. In this case, the eccentric nuts 28, 29 are configured to be inserted in a predetermined portion of the casing receiving portion 38 so that the head portions of the eccentric nuts 28, 29 protrude beyond the outer surface of the bicycle frame 3. The eccentric nuts 28, 29 have an opening 30 that is only provided in a predetermined portion of the eccentric nuts 28, 29, i.e., does not pass completely through.

[0042] 2, it is further specified that the nut 27 described above is realized as a commercially available symmetrical nut 27 with a through-opening 30. The through-opening 30 passes completely through the nut 27. In this case, a commercially available screw locking device (not shown) can be used to prevent unintentional release of the screw connection.

[0043] The embodiment of the mounting device 1 shown in FIGS. 1 and 2 further specifies that the first base body 16 and the second base body 19 each have an outer sleeve 39 and an inner sleeve 40, with the inner sleeve 40 fixed to the outer sleeve 39 and coaxially housed within the outer sleeve 39. The outer sleeve 39 is, in this case, made of a material with vibration-damping and / or vibration-insulating properties and configured to isolate vibrations of the bicycle frame 3 from the drive unit 2. This ensures that vibrations occurring in the drive unit 2 during a given operation of the bicycle 1 cannot be transmitted to the bicycle frame 3, and vice versa. Furthermore, each outer sleeve 39 may have an anti-rotation device 41, by means of which the respective base body 16, 19 can be or is fixed in the respective casing opening 21, 22 so as not to rotate relative to each other. The aforementioned inner sleeve 40 is, in this case, made of a metal material or a (hard) plastic material. Furthermore, while the embodiment shown in Fig. 1 specifies that the inner sleeve 40 has two outer flanges 42, 43 facing each other, in contrast to this, the embodiment shown in Fig. 2 specifies that the inner sleeve 40 has only one outer flange 42, each on the side facing the bicycle frame 3. Likewise, it is also conceivable that the embodiment according to Fig. 2 has two outer flanges 42, 43 facing each other. It is also conceivable that the outer flanges 42, 43 according to Fig. 2 are each on the side opposite the bicycle frame 3.

[0044] It may further be specified that in the above-mentioned 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 are elastically compressed along the opening central axis 20 and elastically expanded in the radial direction relative to the opening central axis 20.

[0045] 3 shows a preferred embodiment of the second screw receiving part 17 with a second base body 19, in which the second base body 19, in particular its outer sleeve 39, has a plurality of axially projecting, uniformly distributed projections 39a. During a given operation of the bicycle 1, the second base body 19 can be supported on the bicycle frame 3 via the axially projecting projections 39a. The projections 39a can be, for example, integrally formed in the outer sleeve 39 and have a tubular, in particular cylindrical, projection body.

Claims

1. A mounting device (1a) for a bicycle (1), in particular an electric bicycle or an electrically assisted bicycle, for mounting a drive unit (2) of said bicycle (1) to a bicycle frame (3) of said bicycle (1), comprising: A shoulder screw (6) comprising a shaft (7) having a threaded portion (8), a first circular portion (9) without threads disposed on the threaded portion (8), a second circular portion (10) without threads disposed on the first circular portion (9), and an annular shaft shoulder (12) disposed between the first circular portion (9) and the second circular portion (10); and a head (13) disposed on the second circular portion (10) of the shaft (7); A nut (27), a first screw receiving part (14) having a hollow cylindrical base body (16) pierced by a longitudinal bore (15); a second screw receiving part (17) having a hollow cylindrical base body (19) pierced by a longitudinal bore (18); Including, The base bodies (16, 19) of the two screw receiving portions (14, 17) are insertable or inserted into two opposing casing openings (21, 22) of a casing (5) of the drive unit (2), the opening central axis (20) being defined by the two opposing casing openings (21, 22), and in this case, the base body (16) of the first screw receiving portion (14) is inserted into the first casing opening (21) of the casing (5) of the casing (5). the base body (19) of the second screw receiving portion (17) can be fixed to, or is fixed to, an inner peripheral surface (23) of the second casing opening (22) of the casing (5) facing the opening central axis (20) so as to be non-rotatable relative to the casing (5) and immovable in the axial direction, and the base body (19) of the second screw receiving portion (17) can be fixed to, or is fixed to, an inner peripheral surface (24) of the second casing opening (22) of the casing (5) facing the opening central axis (20), so as to be non-rotatable relative to the casing (5), and the shoulder screws (6) are insertable or are inserted through two opposing frame openings (25, 26) of the bicycle frame (3) that are aligned with the casing openings (21, 22) of the casing (5) of the drive unit (2) in the assembled state (4) of the bicycle (1), the casing openings (21, 22), and the longitudinal holes (15, 18) of the base bodies (16, 19) of the screw receiving portions (14, 17), and the heads (13) of the shoulder screws are supportable or are supported in contact with the bicycle frame (3); The first substrate (16) is supportable or supported by the first circular portion (9), The second substrate (19) is supportable or supported by the second circular portion (10); and the nut (27) can be screwed onto the threaded portion (8) of the shoulder screw (6), the nut (27) can be supported on the bicycle frame (3) or can be tightened so that the first base body (16) can be fixedly clamped between the axle shoulder portion (12) of the shoulder screw (6) and the bicycle frame (3); A mounting device (1a) for a bicycle (1).

2. 2. The mounting device (1a) according to claim 1, wherein the second base body (19) is supported on the second circular portion (10) by a sliding fit portion (32) or a second sliding fit portion (32).

3. 3. The mounting device (1a) according to claim 1 or 2, wherein the second substrate (19) absorbs only or substantially only radial forces (33).

4. 4. The mounting device (1a) according to claim 1, wherein the first base body (16) is supported on the first circular portion (9) by a sliding fit portion (31) or a first sliding fit portion (31).

5. 5. The mounting device (1a) according to any one of claims 1 to 4, wherein the first base body (16) and / or the second base body (19) absorb both axial forces (34) and radial forces (33) during a given operation of the bicycle (1).

6. 6. The mounting device (1a) according to any one of claims 1 to 5, wherein the threaded portion (8) has a thread diameter, the first circular portion (9) has a first diameter, and the second circular portion (10) has a second diameter, and wherein the second diameter of the second circular portion (10) is greater than the first diameter of the first circular portion (9) and / or the first diameter of the first circular portion (9) is greater than or equal to the thread diameter of the threaded portion (8).

7. 7. The mounting device (1a) according to claim 1, wherein the shaft (7) of the shoulder screw (6) is realized as a solid shaft (36) or as a hollow shaft (37).

8. 8. The mounting device (1a) according to any one of claims 1 to 7, wherein the nut (27) is realized as a cap nut (29) or as a nut (27) with a through-opening (30).

9. 9. The mounting device (1a) according to any one of claims 1 to 8, wherein the nut (27) is realized as a concentric nut or as an eccentric nut (28).

10. 10. The mounting device (1a) according to any one of claims 1 to 9, wherein the first base body (16) and the second base body (19) each have an outer sleeve (39) and an inner sleeve (40), the inner sleeve (40) being fixed to the outer sleeve (39) and the inner sleeve (40) being coaxially housed inside the outer sleeve (39).

11. The outer sleeve (39) is made of a rubber material or an elastomer or silicone, or The outer sleeve (39) is made from a mixture of different rubber materials or The outer sleeve (39) is made from a mixture of various rubber materials and metal or metal mesh or metal alloy or other similar materials. Mounting device (1a) according to claim 10.

12. 12. Mounting device (1a) according to claim 10 or 11, characterized in that the inner sleeve (40) has only one or two opposing outer flanges (42, 43).

13. 13. The mounting device (1a) according to claim 10, wherein in the assembled state (4) of the mounting device (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), is elastically compressed along the opening central axis (20) and elastically expanded in a radial direction relative to the opening central axis (20).

14. A bicycle (1), in particular an electric bicycle or a power-assisted bicycle, at least one mounting device (1a) formed according to any one of claims 1 to 13, a drive unit (2) for driving the bicycle (1), and a bicycle frame (3) configured to support the drive unit (2) and a rider; The base bodies (16, 19) of both screw receiving portions (14, 17) are inserted into two opposing casing openings (21, 22) of a casing (5) of the drive unit (2), which define an opening central axis (20), and in this case, the base body (16) of the first screw receiving portion (14) is inserted into the first casing opening (21, 22) of the casing (5). the base body (19) of the second screw receiving portion (17) is fixed to an inner peripheral surface (23) of the second casing opening (22) of the casing (5) facing the opening central axis (20) so as to be non-rotatable relative to the casing (5) and immovable in the axial direction, and the base body (19) of the second screw receiving portion (17) is fixed to an inner peripheral surface (24) of the second casing opening (22) of the casing (5) facing the opening central axis (20), so as to be non-rotatable relative to the casing (5) and immovable in the axial direction; the bicycle frame (3) has two frame openings (25, 26) facing each other and aligned with the casing openings (21, 22) of the casing (5) of the drive unit (2) when the bicycle (1) is in an assembled state (4); a shoulder screw (6) is inserted through both frame openings (25, 26), both casing openings (21, 22) and the longitudinal holes (15, 18) in the base bodies (16, 19) of the screw receiving portions (14, 17), the head (13) of the shoulder screw being supported in contact with the bicycle frame (3); The first substrate (16) is supported by the first circular portion (9), The second substrate (19) is supported on the second circular portion (10), a nut (27) is screwed onto the threaded portion (8) of the shoulder screw (6), and the nut (27) is tightened so that it is supported by the bicycle frame (3) and the first base body (16) is fixedly clamped between the axle shoulder portion (12) of the shoulder screw (6) and the bicycle frame (3); 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), is elastically compressed along the opening central axis (20) and elastically expanded in a radial direction relative to the opening central axis (20). Bicycle (1).

15. A pre-assembled structural unit, A drive unit (2) for a bicycle (1), in particular an electric bicycle or a power-assisted bicycle, the drive unit (2) having at least one casing opening (21, 22) for mounting or fastening the drive unit (2) by means of at least one mounting device, in particular a shoulder screw (6), and At least one mounting device (1a) according to any one of claims 1 to 13, It has a screw receiving portion (14, 17) of the at least one mounting device (1a) or a base (16, 19) of the screw receiving portion (14, 17) is removably insertable or has been inserted into the at least one casing opening (21, 22) of the drive unit (2) to form the pre-assembled structural unit; Pre-assembled component unit.

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