WO2012123455A1

WO2012123455A1 - Cycle frame, in particular for electric bicycles, having a profile element defining a receptacle

Info

Publication number: WO2012123455A1
Application number: PCT/EP2012/054394
Authority: WO
Inventors: Karlheinz Nicolai
Original assignee: Grace Gmbh & Co. Kg
Priority date: 2011-03-14
Filing date: 2012-03-13
Publication date: 2012-09-20
Also published as: DE102011005520A1

Abstract

The invention relates to a cycle frame (2), in particular for an electric bicycle (1). The cycle frame comprises load-bearing frame parts (4) connected to one another at junctions (6). At least one frame part comprises at least three spaced-apart profiled elements (34) which extend next to one another at least in certain portions. The profiled elements (34) define a receptacle (32) for cycle accessories (30). In this way there results a protected receptacle combined with a very stiff frame part (4).

Description

Bicycle frame, in particular for electric bicycles, with a receptacle spanning

profile element

The invention relates to a two-wheel frame, especially for electric bicycles, with interconnected at nodes, load-bearing frame parts.

Such frame parts are in diamond frame or derived from the diamond frame frame shapes, such as those used in bicycles and electric bicycles, for example, the seat tube, the down tube and the top tube. At the nodes, the frame parts are connected by sleeves or welded joints. Electric bicycles have both a pedal drive and an electric motor drive. In recent years, these types of bicycles, which are also referred to as pedelec or e-bike, are very popular, especially among the older consumer group. The support provided by the electric motor drive makes it possible to cope with longer journeys more quickly and master slopes with less effort. The locomotion assisted by the electric motor allows a constant cruising speed even with decreasing physical performance. The electric bicycles are mostly designed for locomotion on the road or the bike path.

The electromotive drive requires the entrainment of a power source that powers the motor. The energy source is usually in the form of a rechargeable accumulator. In the following, any self-sufficient electrical energy source, irrespective of its rechargeability, ie also a battery, is referred to as the accumulator.

Both in terms of obstruction and the shape of the engines as well as in terms of the way the accumulator is integrated into the wheel, there are considerable differences in the prior art. The size of the accumulator depends on the size and the power of the engine, the distance to be managed with a battery charge and the strength of the support to be provided by the engine.

There are variants in which the accumulator is externally mounted on the bicycle or carried by the driver, for example on the luggage rack, in a holder on the frame or in the backpack. An attachment of the accumulator on the luggage rack of a bicycle is known for example from DE 69603397 T2. Since a rechargeable battery has a high weight sits, shifts when mounted on the luggage rack the overall focus of the bike still up. This affects the driving dynamics properties. Another disadvantage of the solution of DE 69603397 T2 can be seen in the outside of the frame mounted wiring, which establishes the connection between the engine and battery. Outside the frame, the wiring is exposed and can be easily damaged in a fall.

Another possibility is to install the accumulator in the frame tubes. The accumulator thus remains invisible and protected. However, either the accumulator must be adapted to the frame geometry or the frame geometry to the accumulator. The maintenance or replacement of the battery is usually cumbersome and requires an access opening. Such an access opening can weaken the frame. Rechargeable batteries installed in the frame tubes are known, for example, from DE 60209510 T2, DE 10 2008 047 067 A1 and US 20100133778 A1.

It is also known in electric bicycles to attach the accumulator between the seat tube and the rear wheel, as shown for example in DE 6972961 1 T2. However, this approach requires an extension of the rear triangle, which changes the wheelbase of the bike. In particular, the shortest possible distance between the Tretradachse and the rear wheel axle for a good handling in curves increases.

In DE 69427656 T2, the seat tube is moved forward relative to a conventional frame in the direction of travel to allow integration of the battery. Especially for larger cyclists resulting from this shift, however, a poorer ergonomics. For putting in the displacement of the seat tube for sprung bicycles is unfavorable. Since the battery protrudes to the rear, there is a risk that the rear wheel collides with the accumulator during compression.

In view of the above drawbacks, it is an object of the present invention to provide a frame suitable for an electric bicycle, which has a high rigidity and facilitates the attachment of accumulators or other bicycle accessories.

This object is achieved for the above-mentioned bicycle frame according to the invention that at least one frame part has at least three at least partially juxtaposed and spaced-apart profile elements, which span a receptacle for bicycle accessories. By this constructive measure, a rigid receptacle for the bicycle accessories, in particular an accumulator, created. The basic geometry of the frame does not change, because the profile elements and the receptacle simply replace the conventional frame part. Due to the spacing of the profile elements from each other, the area moment of inertia increases compared to the previous frame part, so that the profile elements can be made filigree without sacrificing the rigidity.

The solution according to the invention can be further improved by the following mutually independent, each advantageous and arbitrarily combinable embodiments.

Thus, according to a first advantageous embodiment, at least part of the profile elements may be connected to one another in pairs by means of stiffening walls extending along their longitudinal direction and enclosing the receptacle at least in sections. The stiffening walls lead to a further stiffening of the profile elements having frame part in the recording. Furthermore, they form a protection of the arranged in the receptacle accumulator or other bicycle accessories. The stiffening walls also make it easier to insert the accumulator or other accessories in the receptacle by serving as a guide.

The stiffening walls can span a cross section which opens transversely to the longitudinal direction of the profile elements in a U-shaped manner. The legs of the U-shaped cross-section may surround the receptacle laterally and in particular be formed by the stiffening walls. The leg edges may define a receiving opening for the accumulator or other accessory parts extending in the longitudinal direction of the profile elements and transversely thereto.

The bicycle frame may include a flap or cap through which the receptacle or receptacle is closable to secure the accumulator or bicycle accessories in the receptacle. The flap or lid may be connected by load-transmitting fasteners to the receptacle-spanning profile elements to effect further stiffening. A part of the fasteners can be solvable without tools in order to open the flap or the lid by hand. In order to achieve the largest possible area moment of inertia, at least one pair of profile elements can preferably limit the receiving opening of the receptacle laterally. The pro- Filelemente can have a solid profile, the cross section is smaller in particular than the at least one other of the total of at least three profile elements.

At least one of the profile elements is preferably formed as a hollow profile. The hollow profile may in particular be arranged on the bottom of the receptacle and / or opposite the receiving opening. The cross-section of this profile may be larger than the profile of profile elements located on the sides of the receptacle to accommodate high loads. Instead of a single profile element with respect to the receiving opening and a plurality of separate profile elements or a multi-chamber profile can be used.

The triangular arrangement of the profile elements opposite and on both sides of the receiving opening leads to a high rigidity due to the distance between the profile elements. The arrangement of the profile elements on both sides of the recording also helps that the two-wheeled accessories is better protected in the recording. Furthermore, the two profile elements located laterally of the receptacle shield the profile arranged opposite the receiving opening in the event of lateral falls. To better absorb the loads occurring during operation, the at least two profiles arranged laterally of the receptacle can be rectangular profiles, the longitudinal sides of which run parallel to the plane spanned by the bicycle frame; the at least one profile arranged opposite the receiving opening can likewise be rectangular and extend with its longitudinal side transversely to the at least two other profiles. At least one rectangular profile can limit the reception towards the frame interior. This profile can be used as a stop for the bicycle accessories to be inserted into the receptacle.

In the area of the receptacle, the profile elements are preferably intact, ie not weakened by large recesses or recesses. If necessary, small tapped holes can be present in order to mount components such as plug connectors or holders in the receptacle.

In order to obtain as close as possible to the center of gravity in the receptacle accumulator or other bicycle accessories, the frame part with the profile elements can form a seat and / or down tube of the bicycle frame, because these two frame parts usually reach as far as the lowest point of the bicycle frame, the bottom bracket. Preferably, the receptacle is arranged closer to a ground-level node of the frame part as at a remote node. The ground-level node may be located in particular in the area of a bottom bracket or on the bottom bracket.

In a further advantageous embodiment, the frame part with the profile elements is a down tube of the bicycle frame and the receptacle opens downwards in the direction of a front wheel. In addition to a low center of gravity, this embodiment also ensures sufficient space for unhindered installation of the accumulator or accessory. To mount only the front wheel has to be taken in order to get enough space. In contrast, the seat tube for receiving a battery or other bicycle accessories is disadvantageous because behind the rear wheel blocks the recording and forward the remaining frame parts only little space.

The profile elements spanning the receptacle can be brought together at at least one end located in their longitudinal direction and, in particular, connected to one another at a common connection point. For clamping the receptacle, at least one profile element can be bent. At the merged point, the profile elements can be connected in the same way with the remaining frame parts, as a conventional frame part of a single pipe section. In particular, the profile elements can be connected to at least one longitudinal end with a substantially extending in the direction of the profile elements tube. This also makes it possible to use the profile element having frame part instead of the conventional frame parts. Beyond the longitudinal ends of the receptacle, the profile elements may extend adjacent to each other to form a node.

According to a further advantageous embodiment, the profile elements may extend continuously between two nodes of the two radrah mens to obtain a high strength. The continuous course leads to an unimpeded flow of force through the profile elements. Since the profile of the profile element is not interrupted, there are no notch effects and there are no permanent endangered seams in the middle of the frame part.

The profile elements spanning the receptacle can, at least in sections, be an integral part of an extrusion profile which forms the U-shaped receiving cross section. The reinforcing walls can also be formed from the extrusion profile. This embodiment results in an optically clear frame without seams and cost-effective production. A cost-effective production can be achieved even if the profile elements are designed substantially identical.

The invention also relates to an electric bicycle with an electric motor and a two-wheel frame having any combination of the features described above. In particular, at least one accumulator of the electric bicycle can be arranged in the receptacle spanned by the profile elements.

In order to make the accumulator as simple as possible, the power flow is preferably passed by the profile elements on the accumulator, so that the accumulator remains free of force. In this embodiment, the receptacle can accommodate any accessories.

The invention is explained in more detail below by way of example with reference to exemplary embodiments with reference to the drawings. According to the above embodiments, individual features may be added or omitted in the respective embodiment, depending on whether the effects of these features are desired or unnecessary for the specific application. Similarly, different features can be exchanged for each other in the individual embodiments in order to achieve the required effect for the particular application.

In the accompanying figures, the same reference numerals are used for similar or identical elements in their design and / or function.

Show it:

Fig. 1 is a schematic representation of an electric bicycle with an inventive

Bicycle frame;

FIG. 2 shows a schematic representation of a further embodiment of a bicycle frame according to the invention; FIG.

Fig. 3 is a schematic representation of another embodiment of a bicycle frame according to the invention;

Fig. 4 is a further schematic representation of the bicycle frame of Fig. 3;

Fig. 5 is a schematic sectional view of another embodiment of the invention along the line XX of Fig. 4; Fig. 6 is a schematic representation of another embodiment of a bicycle frame according to the invention.

First, the invention is described with reference to the electric bicycle 1 shown schematically in Fig. 1. The electric bicycle 1 has a bicycle frame 2, which is constructed from frame parts 4, which are connected to each other at node 6, for example, welded together or via sleeves (not shown) are interconnected. In the embodiment of FIG. 1, the geometry of the bicycle frame 2 is derived from a diamond frame. In this case, the frame parts 4 correspond to a top tube 8, a seat tube 10, a down tube 12 and a head tube 14. Furthermore, support struts 16, chain stays 18, as well as a steerer tube 20 and fork sheaths 22 may be present as further frame parts. Of course, instead of a geometry based on a diamond frame, the electric bicycle 1 also another frame shape, such as a gooseneck frame, in which instead of the top tube 8 and the down tube 12 two curved, parallel frame tubes are provided as frame parts 4, Tiefdurchsteiger- or Wave Frame with only one down tube and no top tube as a frame part 4, Anglaise frame with a split top tube as a frame part 4, which extends to the rear, or Y-frames are used in the application of the invention.

The electric bicycle 1 is equipped with a pedal drive 24 and an electric motor drive 26, which support each other or can be used alone. The electromotive drive 26 comprises an electric motor (not shown), which is arranged adjacent to or about a pedal bearing 24 on the bicycle frame 2 holding bottom bracket 28.

For the power supply of the electromotive drive 26 at least one accumulator 30 is provided. If there is no electric motor drive 26, because, for example, the bicycle frame 2 is installed on a bicycle with only pedal drive, the accumulator 30 can be used to supply power to electrical and electronic accessories such as lighting, cadence meters, speed and location displays. Of course, the receptacle 32 can accommodate other accessories such as a tool box instead of a battery 30. The accumulator 30 is arranged in a receptacle 32, which is spanned by profile elements 34. The profile elements 34 may be tubes, struts or supports, hollow or solid profiles be. The profile elements 34 together form a portion of a frame part 4, for example a down tube 12.

The receptacle 32 is preferably arranged so that the center of gravity 36 of the electric bicycle 1 is as close as possible to the ground when the accumulator 30 is inserted. This is achieved in the embodiment shown in Fig. 1, characterized in that the profile elements 34 together form a part of the down tube 12, which grants access to the recording even if the receptacle 32 is arranged as close to the ground as possible.

The receptacle 32 can open in particular in the direction of forward and down. The opening direction of the receptacle is indicated by an arrow 37. In this direction, viewed from the down tube 12 from the front wheel 38, which can be pivoted in the control tube 14 to the side to get in front of an opening 40 of the receptacle 32, in the direction 37, more space for insertion of the accumulator 30.

The profile elements 34 are spaced from each other and next to each other. In the region of the receptacle 32, in particular three, if necessary, more, profile elements can be provided. The three profile elements shown in Fig. 1 are hereinafter referred to as upper down tube 42, left down tube 44 and right down tube 46. The left, right and upper down tubes 42, 44, 46 define the receptacle 32 on three sides. Form the profile elements 34 part of a seat tube 10, they may be referred to as a front, rear, left or right seat tube.

The profile elements 34 do not have to extend continuously between the two nodes 6, via which the frame part 4 is connected to the other frame parts. Thus, FIG. 1 shows that the left and right downpipe 44, 46 form only a portion of the corresponding frame part 4, here of the down tube 12. At a distance from the control tube side, upper node 6, the left and right downpipe 44, 46 are brought together and connected to a lower down tube 48 that extends to the control tube side node 6 out. The location 50 at which the left, right and lower down tubes 44, 46, 48 are interconnected may be stiffened by a connecting strut 52 to the upper down tube.

The upper down tube 42 may be replaced by a plurality of parallel profile elements in a modification of the bicycle frame shown in Fig. 1.

To form the receptacle 32 at least one profile element 34 is bent. In the embodiment of FIG. 1, two profile elements 34, namely the left and right downpipe 44, 46 are bent away from each other at one end of the receptacle 32. At least one Profile element 34, for example the upper down tube 42, may extend in a straight line between its attachment points.

If, as in the electric bicycle 1 of Fig. 1, the bottom bracket 28 of the electric motor drive 26 is mounted, a larger housing 53 is usually required for its inclusion. Such a housing 53 may provide the frame member 4 with the profile members 34 toward a surface 54 of sufficient width and height to secure the receptacle 32 spanning profile members 34 thereto without having to be previously merged. In such an embodiment, the receptacle 32 may extend in full width and depth to the electric motor drive 26 and the bottom bracket. The spacing of the left and right downpipe 44, 46 from one another may correspond in particular to the width of the bottom bracket 28 or the housing 53 transversely to the plane 55 spanned by the bicycle frame 2. Thus, the left and right downpipe 44, 46 can be guided in a straight line to the bottom bracket 28 and housing 53.

An increased rigidity in the region of the receptacle 32 can be achieved by the use of at least one stiffening wall 56. As shown in FIG. 1, two such stiffening walls can be provided on both sides of the receptacle 32. The stiffening walls 56 may extend along a longitudinal direction 58 of the profile elements 34 and connect them in pairs. They may in particular be welded to the respective profile elements 34. The stiffening walls 56 can furthermore, in a plane 60 lying transversely to the longitudinal direction 58 of the receptacle 32, open up to a receiving opening 40 of the receptacle 32 and open in a substantially U-shaped cross-section. Along the edges 62 of the opening 40 preferably extend two profile elements 34, for example, the left and right downpipe 44, 46. Another profile element, the opening 40 opposite to the frame interior 63 towards a bottom 64 of the receptacle 32 may be arranged. This may be, for example, the upper down tube 42. Preferably, the stiffening walls 56 are arranged in a straight portion 65 of the receptacle, in which the profile elements 34 are not or only slightly curved. The straight portion 65 slides in the longitudinal direction 58 of the receptacle 32 to a bent portion 66 at an end 58 located in the longitudinal direction 67. In the bent portion 66, the receptacle 32 widens in the longitudinal direction 58. The profile elements 34 may be constructed of rectangular profiles, wherein the cross sections of at least one pair of profile elements 34, here the left and right down tube 44, 46 are aligned with their longitudinal sides 69 parallel to each other can, while at least one further profile element 34, here the upper down tube 42, a transversely arranged transversely has cut. The longitudinal side of the upper down tube 42 is thus aligned transversely to the longitudinal sides of the two other profile elements 34.

The cross section of the receiving opening 40 opposite profile element 34, 42 is preferably greater than the cross section of the other profile elements 34, 44, 46, which can be constructed somewhat filigree. For example, the upper down tube 42 with its large cross section receives the bending loads transversely to the plane 55, while the left and the right down tubes 44, 46 can be made somewhat finer, since they primarily serve to increase the torsional stiffness and because of their Orientation can pick up well bending loads parallel to plane 55. To connect the accumulator 30 or other accessories to the electric motor drive 26, electrical components, such as plugs and cables, may be provided in the receptacle 32. Also, fasteners (not shown) may be provided to securely hold the accumulator 32 and / or the accessories in the receptacle 30.

The accumulator 30 is preferably received without force in the receptacle 32. The power flow 71, which is passed through the bicycle frame 2, is thus guided past the accumulator 30. The accumulator 30 is thus not part of the support structure of the bicycle frame 2 and can be designed structurally simpler.

The merging of left and right downtube 44, 46 at location 50 and its continuation, for example, as a conventional lower downtube 48 has the advantage that the node 6, with which the lower downtube 48 is attached to the control tube 14, manufactured in a conventional manner can be. Thus, the structural modification is limited compared to a conventional bicycle frame for a pure pedal drive on the adjustment and replacement of the conventional down tube in the carrier side area by the profile elements 34 and the receptacle 32. FIG. 2 shows another embodiment of a bicycle frame according to the invention 2. The bicycle frame FIG. 2 also has the three-tube structure 42, 44, 46 of the exemplary embodiment of FIG. 1 in the region of the receptacle 32. In contrast to the embodiment of FIG. 1, however, the upper down tube 42 is not connected to the head tube 14 or close to the head tube 14 with the top tube 8, but in a central region M of the top tube 8. The Aufnahme 32 extends from the bottom bracket 28 and the housing 54 of the electromotive drive 26 slightly steeper up to the top tube 8 out as in the embodiment of FIG. 1st This results in more space for the front wheel 38 (not shown in FIG. 2). This is particularly especially useful if a fork (not shown) is provided, which has a particularly long travel. Otherwise, the embodiment of FIG. 2 corresponds to the embodiment of FIG. 1.

FIG. 3 shows a further embodiment of a bicycle frame 2 according to the invention with an accumulator 30 which is removed from the receptacle 32.

The frame part 4, here likewise a down tube 12, has, like the two preceding embodiments, a three-tube structure with a left, right and lower down tube 44, 46, 48 as profile elements 34. Two stiffening walls 56 each connect the upper down tube 42 to the left down tube 44 and the right down tube 46. In contrast to the preceding embodiments, the profile elements 34 extend continuously between the two junctions 6, via which the frame part 4 having the profile elements 34 the adjacent frame parts 4, here the seat tube 10 and bottom bracket 28 and the control tube 14 is connected.

In addition, in the embodiment of FIG. 3, three identically shaped profile elements 34 are used, which are arranged in different orientations with respect to one another in such a way that they span the receptacle 32. The use of identically designed profile elements 34 enables a more economical production than the two preceding embodiments.

The profile elements 34 have, in particular, straight end sections 70 which merge into the bent section 66 in the longitudinal direction 58. Between the bent portions 66 is a rectilinear center region 72, which forms the straight portion 65 of the receptacle 32. The receptacle 32 is, as before, in the region of the curved portions 66 and the straight center regions 72. In the direction transverse to the frame plane 55, the sections 66, 70, 72 of the profile elements 34 are aligned with each other and lie with respect to the longitudinal direction 58 at the same height , The end portions 70 each terminate at the node 6. The left and right downpipe 44, 46 are preferably formed completely identical, even at the node 6, they have identically shaped end surfaces 73. The upper down tube 42 has differently shaped end surfaces 73 due to its different orientation. The end surfaces 73 thus nestle against the frame part 4 adjoining the node 6, in order to facilitate the welding. If sleeves are used at the node 6, the end surfaces 73 of all three profile elements 34 may be identical. As in the embodiment of FIG. 1, the cross sections of the left and right downpipe 44, 46 are oriented transversely to the cross section of the upper downtube 42. The cross sections of the left and right downpipe 44, 46 are oriented upright with their longitudinal sides 69 parallel to the control tube 14 and / or seat tube 10. The longitudinal side 69 of the upper down tube 42 is horizontal or transverse to the plane 55th

In Fig. 3 it can also be seen how the accumulator 30 can be inserted through the opening 40 in the direction of an arrow 74 in the receptacle 32.

FIG. 4 shows the embodiment of FIG. 3 in a side view with the accumulator 30 inserted. As can be seen, the end sections 70 at the two ends of a profile element 34 each have different lengths. In particular, the distal end portion 76 is longer than a lower end portion 78 so that a distance A of the accumulator 30 from a node 6 remote from the ground is greater than a distance B from a node 6 near the ground, such as the bottom bracket 28. This guarantees a low center of gravity 36. Of course, the greater length A can also be achieved by a longer curved section 66 on the side remote from the profiled elements 34.

Fig. 5 shows, based on a cross-section along the line X-X of Fig. 4, a further embodiment of the invention. In the frame part 4 according to FIG. 5, the profile elements 34 are combined to form an extrusion profile 79. The stiffening walls 56 are part of the extrusion profile 79, which also includes the left, right and upper down tube 44, 46, 42. The extrusion profile forms a receptacle 32 surrounding the accumulator 30 on three sides.

In order to obtain as much surface as possible at a distance from the profile element 34 forming the upper down tube 42, the profile elements arranged in the region of the receiving opening 40 are solid profiles. Again, the cross sections of the upper down tube 42 and the left and right down tube 44, 46 are oriented perpendicular to each other. Finally, FIG. 6 shows an embodiment of a bicycle frame 2 according to the invention, in which a closure element 80 in the form of a cover or a flap is provided. With the closure element 80, the receiving opening 40 can be closed. The closure element can be connected by load-transmitting fastening elements 82 with the profile elements 34 or the profile elements 34 having frame part 4 and in the guided by the bicycle frame 2 power flow, so that it additionally stiffened the frame part 4 in the region of the receptacle 30. FIG. 6 further shows that the stiffening walls 56 can extend over the entire length of the straight center regions 72 and the straight region 65 of the receptacle. If this region is formed by an extrusion profile, as shown in FIG. 5, then the bent sections 66 and end sections 68 adjoining it in the longitudinal direction 58 can be made of individual profiles and connected to the extrusion profile.

LIST OF REFERENCE NUMBERS

1 electric bicycle

2 Two radra men

4 frame parts

6 knots

8 top tube

10 seat tube

12 down tube

14 head tube

16 support struts

18 chainstays

20 steerer tube

22 fork discs

24 pedal drive

26 electric motor drive

28 bottom bracket

30 accumulator

32 recording

34 profile elements

36 Focus

37 opening direction of the recording

38 front wheel

40 opening

42 upper down tube

44 left down tube

46 right down tube

48 lower down tube

50 joint between left, right and lower down tube 52 connecting strut

53 Housing for electric motor drive

54 surface of the housing

55 plane spanned by the bicycle frame

56 stiffening walls

58 longitudinal direction

60 plane transverse to the longitudinal direction

62 edge of the opening

63 frame inside

64 reason

65 straight area of recording

66 curved area

67 End of recording

69 long sides

70 end section

71 Power flow

72 center area

73 end faces of the profile elements

74 arrow

76 floor-distant end section

78 near the ground end section 79 extrusion profile

80 closure element

82 load-transferring fasteners

A, B distances

M center area

Claims

claims

1 . Two radra men (2), in particular for electric bicycles (1), with at nodes (6) interconnected, load-bearing frame parts (4), characterized in that at least one frame part (4) at least three at least partially juxtaposed and spaced apart profile elements ( 34), which mount a receptacle (32) for two-wheeled accessories, in particular an accumulator (30).

2. bicycle frame (1) according to claim 2, characterized in that at least part of the profile elements (34) extending along the longitudinal direction (58), the receptacle (32) at least partially enclosing stiffening walls (56) are interconnected.

3. bicycle frame (2) according to claim 1 or 2, characterized in that at least laterally of the receptacle (42) arranged profile elements (34, 44, 46) have a solid profile.

4. bicycle frame (2) according to one of claims 1 to 3, characterized in that at least one of an opening (40) of the receptacle (32) opposite profile element (34, 42) is a hollow profile.

5. bicycle frame (2) according to one of claims 1 to 4, characterized in that at least one profile element (34, 42) has a larger cross-section than the other profile elements (34, 44, 46).

6. bicycle frame (2) according to claim 5, characterized in that the at least one profile element (34, 42) with the larger cross-section relative to the opening (40) of the receptacle (32) is arranged.

7. bicycle frame (2) according to one of claims 1 to 6, characterized in that the frame part (4) with the profile elements (34) forms a down tube (12) of the bicycle frame.

8. bicycle frame (2) according to one of claims 1 to 7, characterized in that the receptacle (32) in the direction (37) opens to the front below.

9. Two radra men (2) according to any one of claims 1 to 8, characterized in that the profile elements (34) at least one in the longitudinal direction (58) located end (67) are brought together.

10. bicycle frame (2) according to one of claims 1 to 9, characterized in that at least two profile elements (34) in cross-section with their longitudinal sides (69) transversely to the longitudinal side (69) of at least one further profile element (34) are oriented.

1 1. A bicycle frame (2) according to claim 10, characterized in that at least one profile element (34, 42) limits the receptacle (32) to the frame interior (63).

12. bicycle frame (2) according to one of claims 1 to 1 1, characterized in that the profile elements (34) are at least partially part of an extrusion profile (79).

13. A bicycle frame (2) according to any one of claims 1 to 12, characterized in that the receptacle (32) less far from a lower, near-ground nodes (6) of the receptacle (32) forming the frame element (4) is arranged as from an upper floor remote node (6).

14. bicycle frame (2) according to one of claims 1 to 13, characterized in that at least one profile element (34) is bent.

15. A bicycle frame (2) according to any one of claims 1 to 14, characterized in that the receptacle (30) in its longitudinal direction (58) is constructed substantially identically shaped profile elements (34).

16. Electric bicycle (1) with a pedal drive (24), an electric motor drive (26), characterized by a bicycle frame (2) according to one of claims 1 to 15.

17. Electric bicycle (1) according to claim 16, characterized in that the power flow (71) through the frame member (4) with the profile elements (34) on a in the receptacle (32) mounted two-wheel accessory (30) is guided past.