DE102011005520A1 - Bicycle frame, in particular for electric bicycles, with a recording spanning profile element - Google Patents

Abstract

The invention relates to a two-wheeled frame (2), in particular for an electric bicycle (1). The two-wheeled frame has load-bearing frame parts (4) connected to one another at nodes (6). At least one frame part has at least three profile elements (34) running at least in sections next to one another and spaced from one another. The profile elements (34) span a receptacle (32) for two-wheel accessories (30). In this way, a protected receptacle is created with a very rigid frame part (4).

Description

The invention relates to a bicycle frame, in particular 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 accumulator of electrical energy independent 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 for example from the DE 69603397 T2 known. Since an accumulator has a high weight, the overall center of gravity of the bicycle shifts up when mounted on the luggage rack. This affects the driving dynamics properties. Another disadvantage in solving the DE 69603397 T2 is to be seen in the outside of the frame fixed 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. In the frame tubes built-in accumulators are for example from the DE 60209510 T2 , of the DE 10 2008 047 067 A1 and the US 20100133778 A1 known.

It is also known in electric bicycles to attach the accumulator between the seat tube and the rear wheel, as for example in the DE 69729611 T2 is shown. 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 the 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. In addition, the displacement of the seat tube for spring-loaded 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 disadvantages, it is an object of the present invention to provide a frame suitable for an electric bicycle, which has high rigidity and facilitates 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 that 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 is changing not 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 profile elements may have a solid profile whose cross section is in particular smaller 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 due to the distance between the profile elements to a high rigidity. 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. At most, small threaded holes may be present to install in the recording fixtures such as connectors or brackets.

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. In this case, the receptacle is preferably arranged closer to a node of the frame part which is near the bottom than to a node remote from the floor. 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 Downtube of the bicycle frame and the receptacle opens forward down 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 bicycle frame in order 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 stiffening walls can also be formed from the extrusion profile with. 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 bicycle 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:

1 a schematic representation of an electric bicycle with a bicycle frame according to the invention;

2 a schematic representation of another embodiment of a bicycle frame according to the invention;

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

4 another schematic representation of the bicycle frame of 3 ;

5 a schematic sectional view of another embodiment of the invention along the line XX of 4 ;

6 a schematic representation of another embodiment of a bicycle frame according to the invention.

First, the invention is based on the in 1 schematically illustrated electric bicycle 1 described.

The electric bicycle 1 has a bicycle frame 2 on, the frame parts 4 is built on the nodes 6 connected to each other, for example, welded together or via sleeves (not shown) are interconnected. In the embodiment of the 1 is the geometry of the bicycle frame 2 derived from a diamond frame. In this case, the frame parts correspond 4 a top tube 8th , a seat tube 10 , a down tube 12 and a head tube 14 , Furthermore, support struts 16 , Chainstays 18 , as well as a steerer tube 20 and fork shafts 22 be present as a 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 8th and the down tube 12 two curved, parallel frame tubes as frame parts 4 are provided Tiefdurchsteiger- or Wave frame with only one down tube and no top tube as a frame part 4 , Anglaise frame with a two-part top tube as a frame part 4 which extends to the rear wheel, or Y-frames are used in the application of the invention.

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

To power the electric motor drive 26 is at least one accumulator 30 intended. Is not an electric motor drive 26 present because, for example, the bicycle frame 2 in a bicycle is installed only with pedal drive, the accumulator 30 used to power electrical and electronic accessories such as lights, cadence meters, speed and location indicators. Of course, the recording 32 instead of a rechargeable battery 30 also pick up other accessories such as a toolbox.

The accumulator 30 is in a recording 32 arranged by profile elements 34 is stretched. The profile elements 34 can be tubes, struts or columns, hollow or solid profiles. The profile elements 34 together form a section of a frame part 4 , For example, a down tube 12 ,

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

The recording 32 can open especially in the direction of forward and down. The opening direction of the recording is indicated by an arrow 37 indicated. In this direction lies from the down tube 12 from the front wheel 38 in the head tube 14 can be swung to the side in front of an opening 40 the recording 32 , in that direction 37 , more space for inserting the accumulator 30 to obtain.

The profile elements 34 run at a distance from each other and next to each other. In the field of recording 32 In particular, three, if necessary, more, profile elements may be provided. In the 1 three profile elements shown are hereinafter referred to as the upper down tube 42 , left down tube 44 and right down tube 46 designated. The left, right and upper down tube 42 . 44 . 46 limit the intake 32 on three sides. Form the profile elements 34 Part of a seat tube 10 so they can be referred to as front, rear, left or right seat tube.

The profile elements 34 do not have to be consistent between the two nodes 6 about which the frame part 4 connected to the other frame parts extend. So shows 1 that the left and right down tube 44 . 46 only a section of the corresponding frame part 4 , here of the down tube 12 form. At a distance from the control tube side, upper node 6 are the left and right down tube 44 . 46 merged and with a lower down tube 48 connected to the control tube side node 6 extends. The spot 50 at the left, right and lower down tube 44 . 46 . 48 can be connected together by a connecting strut 52 be stiffened to the upper down tube.

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

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

If, like the electric bicycle 1 of the 1 , at the bottom bracket 28 the electric motor drive 26 is attached, is usually a larger housing for its inclusion 53 required. Such a housing 53 can be to the frame part 4 with the profile elements 34 an area 54 with sufficient width and height to accommodate the recording 32 spanning profile elements 34 to attach without having to be merged before. In such an embodiment, the recording 32 in full width and depth to the electric motor drive 26 or extend the bottom bracket.

The distance between the left and right downpipe 44 . 46 apart from each other, in particular, the width of the bottom bracket 28 or of the housing 53 across to the two-wheeler frame 2 spanned level 55 correspond. This allows the left and right down tube 44 . 46 straight to the bottom bracket 28 or housing 53 be guided.

An increased stiffness in the area of the intake 32 can be achieved by using at least one stiffening wall 56 to reach. As 1 shows two such stiffening walls on both sides of the receptacle 32 be provided. The stiffening walls 56 can move along a longitudinal direction 58 the profile elements 34 extend and connect them in pairs. You can in particular with the respective profile elements 34 be welded. The stiffening walls 56 can also be in a direction transverse to the longitudinal direction 58 the recording 32 lying level 60 one to the receiving opening 40 the recording 32 open opening, essentially U-shaped cross-section. Along the edges 62 the opening 40 preferably extend two profile elements 34 For example, the left and right downtube 44 . 46 , Another profile element may be the opening 40 opposite, to the frame interior 63 towards a reason 64 the recording 32 be arranged. This can, for example, the upper down tube 42 be. The stiffening walls are preferred 56 in a straight area 65 arranged the recording in which the profile elements 34 are not or only slightly curved. The straight area 65 slides in the longitudinal direction 58 the recording 32 to a bent section 66 at a longitudinal direction 58 situated end 67 on. In the bent section 66 the recording expands 32 longitudinal 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 the right down tube 44 . 46 with their long sides 69 may be aligned parallel to each other, while at least one further profile element 34 , here the upper down tube 42 having a transverse cross-section thereto. The long side of the upper down tube 42 is therefore transverse to the longitudinal sides of the other two profile elements 34 aligned.

The cross section of the receiving opening 40 opposite profile element 34 . 42 is preferably larger than the cross section of the other profile elements 34 . 44 . 46 , which can be constructed a little filigree. For example, take the upper down tube 42 with its large cross-section the bending loads across the plane 55 on while the left and right down tube 44 . 46 something filigree can be designed, since they serve primarily to increase the torsional rigidity and due to their orientation well bending loads parallel to the plane 55 be able to record.

To connect the accumulator 30 or other accessories on the electric motor drive 26 can electrical components, such as plugs and cables, in the receptacle 32 be provided. Likewise, fasteners (not shown) may be present to the accumulator 32 and / or the accessories safely in the receptacle 30 to keep.

The accumulator 30 is in the recording 32 Preferably absorbed force-free. The power flow 71 that by the bicycle frame 2 is headed, so is on the accumulator 30 past. The accumulator 30 is therefore not part of the supporting structure of the bicycle frame 2 and can be structurally simpler designed.

The merging of left and right down tube 44 . 46 at the point 50 and their continuation, for example, as a conventional lower down tube 48 has the advantage that the node 6 with which the lower down tube 48 on the head tube 14 attached, can be made in a conventional manner. Thus, the structural modification is limited compared to a conventional bicycle frame for a pure pedal drive on the adaptation and replacement of the conventional down tube in the carrier-side area by the profile elements 34 and the recording 32 ,

2 shows a further embodiment of a bicycle frame according to the invention 2 , The bicycle frame 2 of the 2 points in the field of recording 32 also the three-pipe structure 42 . 44 . 46 of the embodiment of 1 on. In contrast to the embodiment of the 1 is however the upper down tube 42 not on the head tube 14 or near the head tube 14 with the top tube 8th but in a central region M of the top tube 8th , The recording 32 extends from bottom bracket 28 or the housing 54 of the electromotive drive 26 a bit steeper up to the top tube 8th towards as in the embodiment of 1 , This results in the front wheel 38 (in 2 not shown) towards more space. This is particularly useful when a fork (not shown) is provided, which has a particularly long travel. Otherwise, the embodiment corresponds to 2 the embodiment of 1 ,

In the 3 is another embodiment of a bicycle frame according to the invention 2 with an accumulator 30 shown from the picture 32 is removed.

The frame part 4 , here also a down tube 12 , Like the two previous embodiments, has a three-tube structure with left, right and lower down tubes 44 . 46 . 48 as profile elements 34 on. Two stiffening walls 56 connect each of the upper down tube 42 with the left down tube 44 and the right down tube 46 , In contrast to the preceding embodiments, the profile elements extend 34 consistently between the two nodes 6 , about which the profile elements 34 comprising frame part 4 with the adjacent frame parts 4 , here the seat tube 10 or bottom bracket 28 and the head tube 14 connected is.

In addition, in the embodiment of the 3 three identically shaped profile elements 34 used, which are arranged in different orientation to each other so that they are the recording 32 span. The use of identically designed profile elements 34 allows a more economical manufacturing than the previous two embodiments.

The profile elements 34 in particular have straight end sections 70 on, in the longitudinal direction 58 each in the curved section 66 pass. Between the curved sections 66 lies a straight center area 72 that the straight area 65 the recording 32 forms. The recording 32 is located, as before, in the area of the curved sections 66 and the straight center areas 72 , In the direction transverse to the frame level 55 are the sections 66 . 70 . 72 the profile elements 34 aligned with each other and lie with respect to the longitudinal direction 58 at the same height.

The end sections 70 each end at the node 6 , The left and right down tube 44 . 46 are preferably formed completely identical, even at the node 6 they have identically shaped end surfaces 73 on. The upper down tube 42 Due to its different orientation, it has differently shaped end surfaces 73 on. The end surfaces 73 nestle in each case in the knot 6 adjacent frame part 4 to make welding easier. Be muffs at the knot 6 used, the end faces can 73 all three profile elements 34 be formed identical.

As in the embodiment of 1 are the cross sections of the left and right down tube 44 . 46 transverse to the cross section of the upper down tube 42 oriented. The cross sections of the left and right down tube 44 . 46 are upright with their long sides 69 parallel to the head tube 14 and / or seat tube 10 oriented. The long side 69 of the upper down tube 42 lies horizontally or transversely to the plane 55 ,

In 3 It can also be seen how the accumulator 30 through the opening 40 in the direction of an arrow 74 in the recording 32 can be used.

4 shows the embodiment of the 3 in a side view with inserted accumulator 30 , As can be seen, the end sections are 70 at the two ends of a profile element 34 each different length. In particular, the floor-distal end section 76 longer than a ground-level end section 78 , so that a distance A of the accumulator 30 from a node away from the ground 6 is greater than a distance B from a ground-level node 6 like 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 at the bottom side of the profile elements 34 be achieved.

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

To maximize the area at a distance from the upper down tube 42 forming profile element 34 to get those are in the area of the receiving opening 40 arranged profile elements solid profiles. Again, the cross sections of the upper down tube 42 and the left and right down tube 44 . 46 oriented perpendicular to each other.

6 finally shows an embodiment of a bicycle frame according to the invention 2 in which a closure element 80 is provided in the form of a lid or a flap. With the closure element 80 leaves the receiving opening 40 close. The closure element can by load-transmitting fasteners 82 with the profile elements 34 or the profile elements 34 comprising frame part 4 be connected and in that by the bicycle frame 2 directed power flow lie, so that there is also the frame part 4 in the field of recording 30 stiffened.

6 further shows that the stiffening walls 56 over the entire length of the straight center areas 72 or the even area 65 can extend the recording. Is this range of an extrusion profile, as in the 5 shown, formed, so they can in the longitudinal direction 58 subsequent curved sections 66 and end sections 68 be made of individual profiles and connected to the extrusion profile.

LIST OF REFERENCE NUMBERS

1

electric bicycle

2

The bicycle frame

4

frame parts

6

node

8th

top tube

10

seat tube

12

down tube

14

head tube

16

support struts

18

chainstays

20

Steerer tube

22

fork slices

24

Cycle

26

electric motor drive

28

bottom bracket

30

accumulator

32

admission

34

profile elements

36

main emphasis

37

Opening direction of the recording

38

front

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 heart

64

reason

65

straight range of recording

66

curved area

67

End of recording

69

long sides

70

end

71

power flow

72

mid-range

73

End surfaces of the profile elements

74

arrow

76

floor-distant end section

78

near the bottom end section

79

extrusion profile

80

closure element

82

load transmitting fasteners

A, B

distances

M

mid-range

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 69603397 T2 [0006, 0006]
• DE 60209510 T2 [0007]
• DE 102008047067 A1 [0007]
• US 20100133778 A1 [0007]
• DE 69729611 T2 [0008]
• DE 69427656 T2 [0009]

Claims (17)

Bicycle frame ( 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 ) having a receptacle ( 32 ) for bicycle accessories, in particular an accumulator ( 30 ) span. Bicycle frame ( 1 ) according to claim 2, characterized in that at least a part of the profile elements ( 34 ) through along the longitudinal direction ( 58 ), the recording ( 32 ) at least partially surrounding stiffening walls ( 56 ) are interconnected. 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. Bicycle frame ( 2 ) according to one of claims 1 to 3, characterized in that at least one of an opening ( 40 ) of the recording ( 32 ) opposite profile element ( 34 . 42 ) is a hollow profile. 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 ). Bicycle frame ( 2 ) according to claim 5, characterized in that the at least one profile element ( 34 . 42 ) with the larger cross-section opposite the opening ( 40 ) of the recording ( 32 ) is arranged. Bicycle frame ( 2 ) according to one of claims 1 to 6, characterized in that the frame part ( 4 ) with the profile elements ( 34 ) a down tube ( 12 ) of the bicycle frame. 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. Bicycle frame ( 2 ) according to one of claims 1 to 8, characterized in that the profile elements ( 34 ) at least one longitudinally ( 58 ) end ( 67 ) are brought together. 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 ) at least one further profile element ( 34 ) are oriented. Bicycle frame ( 2 ) according to claim 10, characterized in that at least one profile element ( 34 . 42 ) the recording ( 32 ) to the frame interior ( 63 ) limited. Bicycle frame ( 2 ) according to one of claims 1 to 11, characterized in that the profile elements ( 34 ) at least in sections part of an extrusion profile ( 79 ) are. Bicycle frame ( 2 ) according to one of claims 1 to 12, characterized in that the receptacle ( 32 ) less far from a lower, ground-level node ( 6 ) of the recording ( 32 ) forming frame element ( 4 ) is arranged as from an upper floor remote node ( 6 ). Bicycle frame ( 2 ) according to one of claims 1 to 13, characterized in that at least one profile element ( 34 ) is bent. Bicycle frame ( 2 ) according to one of claims 1 to 14, characterized in that the receptacle ( 30 ) in their longitudinal direction ( 58 ) substantially identically shaped profile elements ( 34 ) is constructed. 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. Electric bicycle ( 1 ) according to claim 16, characterized in that the force flow ( 71 ) through the frame element ( 4 ) with the profile elements ( 34 ) at one in the recording ( 32 ) attached bicycle accessories ( 30 ) is passed by.

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