Frame structure for a bicycle

Abstract

Frame structure (2) for a bicycle (1), comprising: a main frame (3) with: a seat tube (8), a top or down tube (9, 10) and a tube section (32) which has at least one elongated hole (36, 37), wherein the tube section (32) is an integral part of the top or down tube (9, 10) or a seat tube-side end of the top or down tube (9, 10) is spaced apart from the seat tube (8) and the tube section (32) is arranged between the seat tube-side end and the seat tube (8), a damping element (50) which is arranged at least partially in the tube section (32) or the top or down tube (9, 10), an element (31) which is slidable along the tube section (32) which, viewed in cross-section, at least partially surrounds the tube section (32) and seals the at least one elongated hole (36, 37), a rear triangle (4) for Mounting of a rear wheel (6) which is pivotally connected to the main frame (3), and an actuating device (43),which effectively connects the rear structure (4) with the damping element (50), wherein the acting means (43) extends through the movable element (31) and the at least one elongated hole (36, 37).

Description

[0001] The following invention relates to a frame structure for a bicycle and to a bicycle.

[0002] Bicycle frame structures with spring and / or damping elements (hereinafter referred to as "spring / damping elements") are well known. Spring elements ensure that the acceleration resulting from an impact is only transmitted to the rider in a reduced manner via the frame structure. Damping elements, on the other hand, dissipate vibrational energy by converting it into heat. It is known to design such spring elements as coil springs. Oil or air dampers are frequently used as damping elements. Combined spring / damping elements are also known. For example, an air spring can be combined with an air damper into a single element that exhibits both spring and damping properties.

[0003] Basically, the rear wheel, the front wheel, the saddle, etc., can be supported against the main frame by means of one or more spring / damping elements. In the case of the rear wheel, this is generally referred to as rear suspension.

[0004] There are many different approaches regarding the arrangement of the spring / damper element in such rear wheel suspensions.

[0005] US 644 957 A describes a spring element inside the top tube of the main frame, which couples the main frame to the rear triangle via a linkage through the seat tube.

[0006] US 973,217 A also describes a spring element in the top tube of the main frame. The top tube has two opposing slots running longitudinally along its length. The seat stays of the rear triangle are connected to the spring element by means of a bolt that passes horizontally through the slots. A very similar approach is pursued in DE 20 2017 005 686 U1, EP 3 708 476 A1, and FR 3 052 433 A1, which describe further embodiments of spring / damping elements in the top tube.

[0007] FR 2 765 854 A1 discloses a rear triangle which, unlike US 973 217 A and DE 20 2017 005 686 U1, is connected to the bolt via a lever arrangement, which extends horizontally through the slots in the top tube and thus provides the coupling to the spring element arranged in the top tube.

[0008] US 5 772 228 A describes a replaceable spring / damper unit that is integrated into the top tube.

[0009] WO 2015 / 051 472 A1 takes a different approach, revealing a spring / damper element integrated into the seat tube above the bottom bracket. The unique feature here is that, when the rear wheel compresses, the seat stays rotate a lever that acts on the spring / damper element. EP 4 215 432 A1 and EP 4 393 805 A1 pursue similar concepts.

[0010] US 11 242 110 B2 pursues an approach in which the spring / damper element is arranged in a recess on the underside of the top tube. Further state of the art is shown in US 2023 / 0 032 001 A1 and US 5 269 552 A.

[0011] The object of the present invention is to create an improved frame structure for a bicycle.

[0012] To solve this problem, a frame structure for a bicycle is proposed, comprising: a main frame with: a seat tube a top or bottom tube and a pipe section which has at least one elongated hole, wherein the tube section is an integral part of the top or bottom tube, or a seat tube-side end of the top or bottom tube is spaced away from the seat tube and the tube section is arranged between the seat tube-side end and the seat tube, a damping element which is at least partially located in the pipe section or the upper or lower tube, an element that is movable along the pipe section, which, viewed in cross-section, at least partially surrounds the pipe section and seals at least one elongated hole, a rear section for mounting a rear wheel, which is pivotally attached to the main frame, and an active element which effectively connects the rear triangle with the damping element, wherein the active element extends through the movable element and the at least one elongated hole.

[0013] Arranging the damping element in the tube section and / or the top tube or down tube is advantageous insofar as the damping element is thus protected from damage caused by improper use, especially falls.

[0014] Furthermore, this solution does not restrict the bicycle manufacturer in the design of the main frame – due to the integrated damping element and the resulting small installation space requirement. For example, it is still possible to mount two water bottles on the main frame.

[0015] Because the sliding element seals the elongated hole from the outside, or is part of a sealing system that ensures the sealing of at least one elongated hole, the ingress of dirt and moisture into the elongated hole can be effectively prevented. Ultimately, this allows at least the damping element, and possibly also the spring element, to be housed inside the tube section or the top or bottom tube, protected from dirt and moisture. This improves its reliability and / or durability.

[0016] A bicycle is specifically a two-wheeled vehicle. It can be designed to be propelled solely by muscle power or it can have an electric auxiliary motor ("electric bicycle" or "e-bike").

[0017] The main frame can be designed as a frame triangle, the sides of which are formed by the seat tube, the top tube, and the down tube. The seat tube is designed to accommodate the seat post. The top tube runs above the down tube. In the riding position of the bicycle on a level road surface, the top tube preferably runs horizontally, although deviations of, for example, up to 30° or up to 20° are also permitted. The down tube typically runs at a steeper angle than the top tube, for example, at an angle to the horizontal of > 45°, > 50°, or > 55°. The seat tube preferably runs vertically, although deviations of, for example, up to 25°, up to 20°, or up to 15° are also permitted. Opposite the seat tube, the top tube and the down tube can be connected by means of a head tube. The head tube is designed to allow the front fork to rotate. The front fork can be single-sided or double-sided.The front fork is designed to hold the front wheel in a rotatable position.

[0018] The tubes mentioned above, such as the seat tube, top tube, down tube, head tube, and / or tube section, can have any suitable cross-section, with round, oval, or square cross-sections being preferred. Round cross-sections are particularly advantageous. It is also conceivable that, for example, the tube section has a round cross-section, while the top tube or down tube has a square cross-section.

[0019] In some embodiments, the tube section is simply a section of the top tube (or down tube), meaning it is integral with the top tube (or down tube) and not a separate part. In other embodiments, the part of the frame structure conventionally referred to as the top tube or down tube is divided into two sections. Accordingly, a top tube (or down tube) is provided whose seat tube end is spaced apart from the seat tube. The resulting gap is filled by the tube section. This preferably connects the seat tube end of the top tube (or down tube) to the seat tube. That is, the top tube (or down tube) is not continuous.The tube section can be manufactured as a separate part from the top tube (or down tube) and can be connected to the seat tube end of the top tube (or down tube) by force-fit, material-fit, and / or form-fit. In some embodiments, the top tube (or down tube) can simply be a short stub attached to the head tube. In this embodiment, the tube section forms the majority of the connecting path between the seat tube and the head tube.

[0020] The damping element and a spring element can both be arranged within the tube section and / or the upper or lower tube. The spring element and the damping element can form an assembly or a combined spring / damping element. This assembly can be arranged within the tube section and / or the upper or lower tube. Alternatively, only the damping element can be arranged within the tube section and / or the upper or lower tube, while the spring element is located outside the tube section and the upper or lower tube. "Outside" here refers specifically to radially outside with respect to a longitudinal center axis of the tube section or the upper or lower tube. In some embodiments, the damping element or the spring element can extend section by section within the tube section and the upper or lower tube.

[0021] The sliding element can be made of metal or plastic. It surrounds the pipe section; that is, the sliding element is arranged radially outside the pipe section with respect to a longitudinal center axis of the pipe section, so that it can seal the at least one elongated hole from the outside. The seal can be achieved simply by the sliding element covering the elongated hole. A special or even separate seal, such as an elastomer seal, labyrinth seal, or wiper, is not strictly necessary. Nevertheless, the sliding element can have or form at least one seal, preferably two seals. In the case of only one seal, the sliding element can be part of a sealing concept in which the seal is achieved at a second location, spaced apart from the first seal, by a seal attached to another element or part, in particular an orifice.The sliding element can have one, two, or more seals. The seals can be attached to the sliding element. However, a seal can also be achieved solely by a seal attached to another element bearing against the sliding element. In this case, the sliding element merely serves as a sealing surface. The resulting seal prevents the ingress of dirt or moisture from the outside into the elongated hole, particularly towards the damping element.

[0022] Preferably, the movable element is designed as a thin-walled element, in particular as a sleeve, preferably with a closed cross-section as seen in cross-section, in particular a round, oval or polygonal cross-section.

[0023] The rear triangle preferably has two seat stays. In particular, the seat stays can be connected to the active element at their ends furthest from the rear wheel. In particular, the chainstays are pivotally connected to the main frame at their ends furthest from the rear wheel.

[0024] The actuating element connects the rear suspension to the damping element. This refers to a functional coupling whereby movement of the rear suspension with an upward component (especially upon impact with the rear wheel) leads to the actuation of the damping element, causing damping work to be performed within it. Specifically, the actuating connection can be designed such that the aforementioned movement of the rear suspension causes a piston rod to retract into a cylinder of the damping element.

[0025] The actuating element extends through the movable component and at least one elongated hole. This allows the movement of the rear triangle to be transferred into the tube section. The effective connection between the rear triangle and the damping element, provided by the actuating element, can be indirect; that is, other components, such as a lever mechanism, can be interposed between the rear triangle and the actuating element or the damping element.

[0026] According to one embodiment, the movable element is slidably mounted along the pipe section.

[0027] Therefore, lateral forces and bending moments originating from the rear triangle, resulting, for example, from riding, can be transferred into the tube section and thus into the main frame. Accordingly, these lateral forces and bending moments are kept away from the damping element and, if applicable, also from the spring element, ensuring their proper function over the long term.

[0028] For sliding support, one or more plain bearings can be provided. In particular, the sliding element can have a plain bearing at each opposite end. Roller bearings, especially ball bearings, can be used instead of or in addition to the plain bearings. Generally, the bearings used for sliding support are linear bearings.

[0029] According to another embodiment, the rear structure is operatively connected to the movable element, with a force introduction point of the operative connection into the movable element, viewed in the direction of the upper or lower tube, being located in front of the operative means.

[0030] In other words, the point of force application is shifted towards the seat tube. This means the rear triangle doesn't need to extend as far forward, towards the front wheel, for example, to (indirectly) connect the seat stays to the force source. Overall, this results in a more compact design.

[0031] According to another embodiment, the frame structure has a lever arrangement which connects the main frame, the rear triangle and the movable element in such a way that movements of the rear wheel with an upward movement component are transferred to the movable element with a reduction ratio and / or a torque that twists the rear triangle is absorbed by the main frame.

[0032] Accordingly, large movements of the rear wheel lead to relatively small movements of the movable element and thus also to smaller movements of the damping element and, if applicable, also of the spring element.

[0033] This allows even the largest compression movements of the rear suspension to be achieved. Furthermore, the rear suspension is regularly subjected to torsional rotation during riding, particularly when standing and pedaling. Advantageously, according to this design, the torsional torque is transferred to or absorbed by the main frame via the lever position, so that it is not transmitted to the sliding element or the damping element. This ensures the proper functioning of the damping element over the long term.

[0034] According to another embodiment, the lever position has a rocker arm which has a first, second and third pivot point in this order, wherein the first pivot point is connected to the main frame, in particular the seat tube, via a lever, the second pivot point to the sliding element and the third pivot point to the rear triangle.

[0035] The reduction ratio described above and / or the absorption of the torsional torque can be easily accommodated by means of a rocker arm designed in this way. Preferably, the rocker arm is designed as a double rocker arm. That is, the rocker arm consists of two rocker elements, each rocker element having a first, second, and third pivot point in that order, wherein the first pivot point is connected to the main frame, in particular the seat tube, via a lever, the second pivot point to the sliding element, and the third pivot point to the rear triangle. This results in a symmetrical and therefore particularly stable design, especially with regard to torsional torque.

[0036] According to another embodiment, the frame structure further comprises a spring element against which the movable element is supported, the movable element extending at least partially through the spring element.

[0037] Accordingly, in this embodiment, the spring element is arranged separately (i.e., not within an assembly with the damping element or as a combined spring / damping element) in relation to the damping element. In particular, the spring element is arranged outside the tube section and / or top tube or down tube. This allows space to be saved within the tube section or the top or down tube, enabling these elements to be designed with a smaller diameter.

[0038] According to a further embodiment, the frame structure has a spring element which is arranged in the tube section and / or upper or lower tube and / or is operatively connected to the damper element, in particular a piston rod thereof.

[0039] In this case, the spring element is integrated into the tube section and / or the upper or lower tube, thus protecting it from dirt and moisture (and therefore corrosion). In some embodiments, the actuation of the damper element by means of the piston rod simultaneously actuates the spring element.

[0040] According to a further embodiment, a service opening is arranged in the tube section and / or the upper or lower tube, through which the damping element and / or the spring element is accessible for replacement, repair and / or maintenance.

[0041] Maintenance can include, for example, adjusting the damping characteristics of the damping element. This allows for simple and maintenance-friendly accommodation of the damping element and / or the spring element. A flap can be provided to conceal the service opening. The service opening is preferably designed as an opening in a wall of the tube section and / or the top or bottom tube.

[0042] According to a further embodiment, when the rear wheel is in its initial position in the vertical direction, the force application direction of the rear structure and the movable element deviates from the longitudinal direction of the movable element by no more than 10°, preferably less than 5°.

[0043] This prevents or reduces the tendency for the sliding element to tilt relative to the pipe section. If a bearing is provided between the sliding element and the pipe section, this design reduces frictional forces, which in turn has a positive effect on the damping or suspension response. The longitudinal direction refers to the longitudinal center axis of the sliding element. The initial position refers specifically to the uncompressed state.

[0044] According to a further embodiment, the movable element has a sleeve through which the pipe section extends, the sleeve forming a first seal and a second seal spaced apart from it, preferably with the at least one elongated hole always being arranged between these seals.

[0045] As explained above, the first or second seal can be formed by attaching a corresponding seal to the sliding element. Alternatively, the sliding element can simply serve as a sealing surface, sealing against a seal attached to another element, such as a pipe section or a fitting, or sliding along it in a sealing manner. By always positioning at least one elongated hole between these seals, it can be reliably sealed. However, a seal can also be achieved in other ways, as explained below.

[0046] According to a further embodiment, the first seal at an end of the sleeve facing the seat tube seals against the tube section, and the second seal at the end of the sleeve facing the top tube or down tube seals against the tube section or against an aperture surrounding the tube section forming an annular gap.

[0047] The seal against the aperture allows the tube section to be made significantly shorter, which facilitates its integration into the main frame. This is because, in this case, it is not necessary for at least one elongated hole – geometrically speaking – to always be positioned between the two seals (i.e., between the first and second seals). Whenever the end of the sleeve is mentioned here, this also includes the end section.

[0048] The first and / or second seal can be designed as a wiper, elastomer, elastomer seal or the like.

[0049] According to another embodiment, the active element is an axle or a bolt. In some embodiments, the pipe section can have two opposing elongated holes. The axle or bolt can extend through both elongated holes.

[0050] The axle or bolt can point horizontally and perpendicular to the direction of travel when the bicycle or frame structure is in motion. In an alternative embodiment, instead of the axle or bolt, inwardly projecting projections could be formed on the sliding element, extending through the one or more elongated holes.

[0051] According to another embodiment, the working element is connected to a rod which is provided to be slidable in the longitudinal direction of the pipe section and is operatively connected to the damping element.

[0052] The rod can be the piston rod of the damping element or another rod connected to the piston rod of the damping element. The rod can have an eye at its free end through which the working element, in the form of the axle or bolt, extends. In some embodiments, the rod can be removable or replaceable. In others, the rod can be press-fitted to the axle or bolt. In still others, the axle or bolt can be fixed in the eye of the rod by means of screws and / or pins. A slotted design of the eye with a clamping screw is also conceivable for a detachable connection between the rod and the axle or bolt.

[0053] According to another embodiment, the tube section is detachably connected to the seat tube end of the upper or lower tube and the seat tube.

[0054] This allows the tube section to be inserted and / or replaced in the corresponding gap between the top or down tube and the seat tube. This can be important for initial assembly. It can also be relevant for subsequent maintenance work.

[0055] In alternative embodiments, the tube section can be permanently installed or, as explained above, formed integrally with the upper or lower tube. In this case, for example, the damper element and, if applicable, the spring element could be installed via the service opening or another opening.

[0056] According to another embodiment, the tube section is rigidly connected to the seat tube end of the upper or lower tube and / or pivotably connected to the seat tube.

[0057] The pivoting connection to the seat tube prevents bending forces from the seat tube being transferred into the tube section during riding, thus preventing them from negatively affecting the responsiveness of the damping element and, if applicable, the suspension element. Advantageously, the rigid coupling at the seat tube end of the top and down tubes allows bending forces or moments from the tube section to be transferred into the top or down tube.

[0058] According to another embodiment, the tube section is connected to the seat tube end of the upper or lower tube by means of a Hirth coupling and / or to the seat tube by means of an eye-bolt connection.

[0059] The Hirth coupling allows for a simple rigid connection, while the eye-bolt connection allows for a swiveling connection, as described above.

[0060] According to another embodiment, the rear triangle is articulated to the main frame in the area of ​​a bottom bracket.

[0061] In particular, one or more chainstays of the rear triangle are pivoted in the area of ​​the bottom bracket.

[0062] According to another aspect, a bicycle with the frame structure described above will be provided.

[0063] The term "one" here is not necessarily to be understood as restricting the number to exactly one element. Rather, it can also refer to multiple elements, such as two, three, or more. Similarly, every other counter used here should not be interpreted as restricting the number to the exact number stated. Instead, numerical deviations, both higher and lower, are possible unless otherwise specified.

[0064] Further advantageous embodiments and aspects of the invention are the subject of the dependent claims and the exemplary embodiments of the invention described below. The invention will be explained in more detail below with reference to preferred embodiments and the accompanying figures. Fig. Figure 1 shows a side view of a bicycle according to one embodiment; Fig. 2 shows a frame structure of the bicycle made of Fig. 1, where one of the chainstays is not shown; Fig. Figure 3 shows a perspective view of the lever position of the frame structure; Fig. 4 shows the view from Fig. 2, however, one spring / damper unit has been removed; Fig. Figure 5 shows the spring / damper unit in a perspective view; Fig. Figure 6 shows a longitudinal section VI from Fig. 5; Fig. 7 shows a section VII-VII from Fig. 5; Fig. Figure 8 shows the spring / damper unit in its individual parts; Fig. 9 shows the view from Fig. 6 in the compressed state; Fig. Figure 10 shows the framework structure from Fig. 1 in the compressed state; Fig. 11 shows the view from Fig. 2 in the compressed state; Fig. 12 shows the view from Fig. 1 according to one variant; Fig. Figure 13 shows the spring / damper unit of the variant in a perspective view; and Fig. 14 shows a longitudinal section XIV-XIV from Fig. 13.

[0065] In the figures, identical or functionally equivalent elements have been labelled with the same reference symbols, unless otherwise indicated. Furthermore, it should be noted that the representations in the figures are not necessarily to scale.

[0066] Fig. Figure 1 shows a bicycle 1 in the form of a two-wheeler. The bicycle 1 comprises a frame structure 2, which is in Fig. 2 is shown in isolation. The frame structure 2 comprises a main frame 3, to which a rear section 4 is pivotally attached at the rear, and to which a front section 5 is rotatably held at the front.

[0067] The rear section 4 carries a rear wheel 6 on a rotatable bearing, the front section 5 a front wheel 7.

[0068] The main frame 3 consists of a seat tube 8, a top tube 9, a down tube 10, and a head tube 11. The aforementioned tubes 8 to 11 form a triangle. A seatpost 12 is inserted into the seat tube 8. The head tube 11 allows the front section 5 to rotate freely.

[0069] The rear triangle 4 is pivoted around a pivot point 14 in the area of ​​a bottom bracket 13. The associated pivot axis extends horizontally and perpendicularly to the direction of travel F when the bicycle 1 is in motion. In particular, the rear triangle can have chainstays 15, 16 which are pivotable at their main frame-side ends around the pivot point 14 or the pivot axis associated therewith. Furthermore, the rear triangle 4 can have seat stays 17, 18, with the seat stay 18 being in Fig. 1 not shown because it is hidden, however in Fig. 2 can be seen. The wheel-side ends of the seat stays 17, 18 and those of the chainstays 15, 16 hold a wheel bearing 19, by means of which the rear wheel 6 is held rotatably.

[0070] The seat stays 17, 18 are pivoted at their respective main frame-side ends to a lever arm 20. The lever arm 20 is in Fig. 2 without the seat stay 17, which partially covers it, shown in side view. Fig. Figure 3 shows the lever position 20 from Fig. 1 in perspective view.

[0071] The lever position 20 is held on the seat tube 8 by means of a bracket 21. The lever position 21 comprises, for example, a double rocker with two rocker elements 22, 23, which are located on either side of a spring and / or damper unit 24 (hereinafter referred to as "spring / damper unit"), which will be described in more detail later. Fig. 1 shown, however in Fig. (3 hidden for clarity) extend vertically or accommodate the spring / damper unit 24 between them. Each of the rocker elements 22, 23 comprises a first pivot point 25a or 25b, a second pivot point 26a or 26b, and a third pivot point 27a or 27b. The pivot points 25a to 27b each define rotation or pivot axes, which are oriented horizontally and perpendicular to the direction of travel when the bicycle 1 is in motion. A lever 28 is pivotally connected to the first pivot point 25a, 25b of each rocker element 22, 23. Opposite each first pivot point 25a, 25b, the lever 28 is connected to the bracket 21 at a pivot point 30a, 30b. At pivot point 26a, 26b, the rocker element 22 or 23 is attached to a movable element 31 (see, for example, Fig. 5) the spring / damper unit 24 is articulated. The main frame-side ends of the seat stays 17, 18 are articulated at pivot point 27a, 27b. In the exemplary embodiment, pivot points 25a or 25b, 26a or 26b, and 27a or 27b are arranged one after the other along a straight line in this order. A connecting axis 29 can be provided for coupling the rocker elements 22, 23.

[0072] Fig. Figure 4 shows the spring / damper unit 24 in a state removed from the main frame 3. This state occurs, for example, during the initial assembly of the spring / damper unit 24 as part of the main frame or during a replacement or repair of the spring / damper unit 24. Fig. Figure 5 shows the spring / damper unit 24 in an enlarged perspective view. Fig. Figure 6 shows a longitudinal section VI from Fig. 5, and Fig. 7 shows a longitudinal section VII perpendicular to it. Fig. 5, but in perspective view. Fig. Figure 8 shows the spring / damper unit 24 in a disassembled state. The following description of the spring / damper unit 24 refers to the aforementioned figures.

[0073] As in Fig. As shown in Figure 8, the spring / damper unit 24 comprises a tube section 32, the aforementioned sliding element 31 provided to be slidable on this tube section, and a spring element 62, which, according to this embodiment, is provided outside the tube section 32 in the assembled state, as shown in Figure 8. Fig. 5 can be seen.

[0074] The pipe section 32 has an upper pipe end with a Hirth toothing 33, by means of which it is connected to a corresponding Hirth toothing 23 (see Fig. 4) can be detachably engaged at the end of the top tube 9 facing the seat tube 8. Due to the Hirth coupling 33, 34, a rigid connection is formed through which bending moments can be transmitted. Opposite, at its seat tube-side end, the tube section 32 is provided with an eye 35. In the assembled state, a bolt engages through the eye 35, pivotably connecting the bracket 21 to the eye 35, so that a Fig. 2 shown pivot point 61 (in Fig. 2) of the pipe section 32 at the bracket 21. The corresponding pivot axis at the pivot point 61 is again horizontally and perpendicularly to the direction of travel.

[0075] The pipe section 32 also has elongated holes 36, 37 opposite each other in the transverse direction ( Fig. 6 and Fig. 8) which extend in the longitudinal direction of pipe section 32. Pipe section 32 can in turn - see Fig. 8 - composed of a first element 38 and a second element 39, which are firmly connected in the longitudinal direction of the pipe section 32 - for example by means of a positive-locking connection 72. The first element 38 can, for example, have a diameter D1 which is smaller than the diameter D2 of the second element 39. In particular, the first element 38 can have the elongated holes 36, 37. However, as will be described in more detail in the second embodiment later, the first and second elements 38, 39 can also each have substantially the same diameter (see Fig. 14). The movable element 31 is pushed over the pipe section 32 or the first element 38 thereof for the purpose of mounting the spring / damper unit 24 (see Fig. 8), which is sleeve-shaped or has a sleeve 71. At this point, an aperture 40 – depending on the sealing concept used – may already be mounted on the end of the first element 38 that faces the second element 39. The aperture 40 is, as in Fig. 6 in conjunction with Fig. 8 can be seen, is shaped like a sleeve and defines an annular space 41, into which a section 42 ( Fig. 8) of the movable element 31 in a Fig. The spring / damper unit 24 can be retracted to the compressed state shown in Figure 9.

[0076] If the movable element 31 is pushed onto the first element 38, an axis 43 is formed (see Fig. 6 in conjunction with Fig. 8) inserted through the sliding element 31 and secured on both sides by means of screws 44a, 44b. The axle 43 extends through the elongated holes 36, 37 and through an eye 45 at the end of a rod 46. The rod 46 is, as in Fig. 6 can be seen, in a cavity 47 enclosed by the pipe section 32 or the first element 38. This is also evident in Fig. 7. The rod 46 can be slidably mounted in the cavity 47 by means of one or more linear bearings 48 in the longitudinal direction L of the pipe section 32. The rod 46 can be connected to a piston rod 49 of a damper element 50, as shown in the initial example, in particular by screwing (as in Fig. Figure 6 shows a screw connection 51. In other embodiments not shown, the rod 46 is the piston rod of the damper element 50.

[0077] The damping element 50 is arranged in the pipe section 32, specifically in the second element 39 thereof. A cavity 52 is defined in the second element 39, which accommodates the damping element 50. The damping element 50 can comprise a cylinder 53 containing oil, air, or another hydraulic fluid. The damping effect occurs when the piston rod 49 moves into the cylinder 53. An excess or expansion vessel (not shown) can, for example, be mounted outside the pipe section 32 and fluidically connected to the cylinder 53. The damping characteristics of the damping element 50 can be positively influenced by such an expansion vessel.

[0078] At its end furthest from the rod 49, the cylinder 53 can be pivotably held by means of an axle 54 that transversely penetrates the second element 39. Via a Fig. The service hatch 55 shown in Figure 8 provides access to an opening 56 in the pipe section 32 or the second element 39. The damper element 50 can be installed, replaced, or serviced via the opening 56.

[0079] In Fig. Figure 8 shows that the movable element 31 comprises a second section 57, which faces the seat tube 8, opposite the first section 42, which faces the top tube 9. The axis 43, which can also be formed by a bolt, is arranged between the two sections 42 and 57. The axis 43 acts as a means by which the movement of the movable element 31, or its displacement along the longitudinal direction L, is transmitted to the damper element 50. In addition to the movement of the movable element 31, the second section 57 of the movable element 31 also exhibits movement due to its coupling with the rocker elements 22 and 23. The second section 57 can, as shown, Fig. Figure 5 shows the sections 58a and 58b projecting on both sides. Sections 58a and 58b are each rotatably connected to the rocker element 22 and 23 respectively, such that the pivot points 26a and 26b are located there (see Figure 5). Fig. 5 and Fig. 6). The second pivot points 26a, 26b and paragraphs 58a, 58b form force introduction points K1, K2 (see Fig. 5 and Fig. 6), which are arranged longitudinally in front of the axis 45. In other words, the force application points K1, K2 are located between the seat tube 8 and the pivot point 61 respectively (see Fig. 2) and the axis 43 (i.e. the active agent).

[0080] The spring element 62 surrounds, as in Fig. As can be seen in Figure 5, the movable element 31 is at least partially – in the longitudinal direction. That is, the movable element 31 is at least partially arranged within the spring element 62. The spring element 62 is, for example, designed as a coil spring made of steel or the like. As shown in Fig. As shown in Figure 6, the spring element 62 is supported on one side by a counter-support 59 on the tube section 32, in particular on the transition section between the first element 38 and the second element 39 of the tube section 32. This corresponds to an upper tube end of the spring element 62. Opposite this, the spring element 62 is supported on a counter-support 60 on the movable element 31. The counter-support 60 can, for example, be screwed onto the movable element 31 or be formed integrally with it. The counter-support 60 can be oriented in the longitudinal direction L, as shown in Figure 6. Fig. 8 can be seen, located between the first and second sections 42, 57, in particular between the axis 43 and the second section 56.

[0081] The rear wheel experiences 6, as in Fig. As shown in Figure 1, an upward thrust S causes this, or rather the entire rear structure 4, to pivot about the pivot point 14 or the pivot axis associated with it. As shown in Figure 1. Fig. As shown in Figure 10, this results in the main frame-side ends of the seat stays 17, 18 (in Fig. 10 (the seat stay 18 is hidden) moves forward (i.e., in the direction of travel F). This moves the third pivot points 27a, 27b (in Fig. (10, pivot point 27b is obscured) is shifted forward, resulting in a rotation of the rocker elements 22, 23 around the first pivot points 25a, 25b. The intermediate second pivot points 26a, 26b are also shifted forward accordingly along the longitudinal direction L of the pipe section 32. This causes the movable element 31 ( Fig. 11) along the pipe section 32, in particular the first element 38 thereof. The resulting state is in Fig. 11 to recognize, in which, unlike Fig. 10 the seat stay 17 is not shown. As a result, the spring element 62 is compressed, as in the Fig. 9, Fig. 10 to Fig. 11 to be recognized, and in the damping element 50 vibration energy is destroyed.

[0082] Due to the distance of the third pivot point 27a, 27b from the second pivot point 26a, 26b, a reduction ratio results between a deflection movement of the rear wheel 6 and a movement of the movable element 31 or the piston rod 49 of the damper element 50. In other words, a shock S that moves the rear wheel 6 upwards by 1 cm results in a movement of the movable element 31 or the piston rod 49 by less than 1 cm.

[0083] The double rocker with the rocker elements 22, 23 ensures that torsional torques from the rear triangle 4 are introduced into the bracket 21 or the seat tube 8 and not into the sliding element 31.

[0084] Saddle stays 17, 18 are preferred in the Fig. In the initial situation shown in Figure 1 (unsprung state), the force application device KER is oriented parallel to the longitudinal direction L of the pipe section 32 or the identical longitudinal direction of the movable element 31. Accordingly, the force application device KER resulting from the impact S is also oriented parallel to the longitudinal direction L.

[0085] Returning to Fig. 6. The movable element 31 has a closed sleeve 71 (in cross-section) which, when mounted on the pipe section 32 or the first element 38 thereof, completely encloses the pipe section or the first element 38. The movable element 31 is slidably mounted on the pipe section 32 or the first element 38 thereof in the longitudinal direction L by means of sliding bearings 63 and 64. The sliding bearing 63 can be located at the saddle-tube end of the movable element 31, and the sliding bearing 64 at the top-tube end of the movable element 31.

[0086] On the outside, i.e., in front of the sliding bearings 63, 64, the sliding element 31 has ring seals 65, 66. The ring seals 65, 66 can be designed as wipers. The ring seals 65, 66 are attached to the inside of the seat tube end and the top tube end of the sliding element 31 and seal against the Fig. 9 the visible outer surface 67 of the pipe section 32 or of the first element 38 thereof. Accordingly, dirt and moisture cannot reach the sliding bearings 64, 65 and especially not the elongated holes 36 and 37. Accordingly, no dirt or moisture can reach the cavity 47 and the damping element 50. As in Fig. As can be seen in Figure 6, in this embodiment the elongated holes 36, 37 are always located between the ring seals 65, 66 (along the longitudinal direction).

[0087] It should be noted at this point that embodiments are conceivable in which the movable element 31 is not designed as a sleeve 71, but is at least partially open along its circumference, yet still seals the elongated holes 36, 37. It is also conceivable to provide only a single elongated hole or more than two elongated holes instead of the two elongated holes 36, 37. In the case of only one elongated hole, only a one-sided engagement would be required instead of the through-axis 43 in the present embodiment.

[0088] It should be further noted that, in the embodiment described here, the damping element 50 extends exclusively within the tube section 32 or its second element 39. In other embodiments, it may be arranged at least partially or completely within the upper tube 9. It should also be noted that in other embodiments, the tube section 32, particularly its second element 39, may be formed integrally with the upper tube 9. In the present embodiment, however, the tube section 32 is designed as a separate part with respect to the upper tube 9.

[0089] Although described here for the top tube 9, the spring / damper unit 24 could just as easily be integrated into the down tube.

[0090] It should also be noted that the aperture 40 is not strictly necessary; in this embodiment, it merely serves to prevent larger dirt particles from entering. The ring seal 66 (see Fig. 6) In an embodiment without the aperture 40, it can also seal against the outer surface 67 as a sealing surface.

[0091] It should also be noted that the ring seal 66 could also be located on the inside 68 of the aperture 40, specifically at its seat tube-side end. In this case, the elongated holes 36, 37 are not always positioned between the ring seals 65, 66 (in a geometric sense). Nevertheless, a seal is ensured.

[0092] The Fig. 12, Fig. 13 to Fig. Figure 14 illustrates a variant in which the spring element 62 is not arranged on the outside of the tube section 32, but inside it. This is shown in Fig. Figure 14 shows that, for example, the spring element 62 can be arranged between a counter-holder 69 on the piston rod 49 and a support surface 70 on the cylinder 53 of the damper element 50. In other embodiments, the damper element 50 is designed as a combined spring / damper element. Accordingly, for example, in an embodiment of the damper element 50 as an air spring-damper element, the enclosed air provides both damping and spring properties.

[0093] Accordingly, in the embodiment according to the Fig. 12, Fig. 13 to Fig. 14 no counterholders 59, 60 (cf. Fig. 5) Furthermore, in this embodiment, the ring seal 66 is attached to the outside of the upper tube end of the movable element 31 and seals against an inner surface 68 (see Fig. 14) of the aperture 40. Accordingly, a volume defined between the ring seal 66 and the aperture 40 within the annular space 41 remains free of dirt and moisture at all times, especially when the movable element 31 is immersed in the annular space 41 due to a compression movement of the rear wheel 6. Accordingly, dirt and moisture cannot reach the sliding bearing 64 and, in particular, not the elongated holes 36 and 37. Likewise, due to the presence of the ring seal 65, no dirt or moisture can penetrate to the sliding bearing 63, and especially not from this side to the elongated holes 36, 37. Accordingly, no dirt or moisture enters the cavity 47 and the damping element 50. As in Fig. As can be seen in Figure 14, in this embodiment the elongated holes 36, 37 are not located, or not always located, between the ring seals 65, 66 (along the longitudinal direction). Accordingly, the first element 38 of the pipe section 32 can be made shorter. REFERENCE MARK LIST 1 bicycle 2. Framework structure 3 main frames 4 Rear triangle 5 Front section 6 rear wheel 7 front wheel 8 seat tube 9 Top tube 10 Down tube 11 Head tube 12 Seatpost 13 bottom bracket 14 Pivot point 15 Chainstay 16 Chainstay 17 Seat stay 18 Seat stay 19 wheel bearings 20 Lever position 21 bracket 22 rocker element 23 rocker element 24 Spring / damper unit 25a first pivot point 25b first pivot point 26a second pivot point 26b second pivot point 27a third pivot point 27b third pivot point 28 levers 29 Connecting axis 30a pivot point 30b pivot point 31 movable element 32 Pipe section 33 Hirth coupling 34 Hirth coupling 35 Eye 36 slotted hole 37 Slotted hole 38 first element 39 second element 40 aperture 41 Ring space 42 first section 43 axle 44a screw 44b screw 45 Eye 46 bars 47 Cavity 48 linear bearings 49 Piston rod 50 damper element 51 Screw connection 52 Cavity 53 cylinders 54 axle 55 Service hatch 56 Opening 57 second section 58a paragraph 58b paragraph 59 Counterholds 60 Counterholders 61 Pivot point 62 Spring element 63 plain bearings 64 plain bearings 65 ring seal 66 ring seal 67 outdoor area 68 interior surface 69 Counterholder 70 support surface 71 Sleeve 72 connection D1 diameter D2 diameter F Direction of travel K1 Force introduction point K2 Force introduction point KER Force application direction L Longitudinal direction S impact

Claims

[1] Frame structure (2) for a bicycle (1), comprising: a main frame (3) with: a seat tube (8), a top or down tube (9, 10) and a tube section (32) which has at least one elongated hole (36, 37), wherein the tube section (32) is an integral part of the upper or lower tube (9, 10) or a seat tube-side end of the upper or lower tube (9, 10) is spaced apart from the seat tube (8) and the tube section (32) is arranged between the seat tube-side end and the seat tube (8), a damping element (50) which is arranged at least partially in the tube section (32) or the upper or lower tube (9, 10), an element (31) which is movable along the pipe section (32), which, viewed in cross-section, at least partially surrounds the pipe section (32) and seals at least one elongated hole (36, 37), a rear structure (4) for receiving a rear wheel (6), which is pivotally connected to the main frame (3), and an active means (43) which effectively connects the rear structure (4) with the damping element (50), wherein the active means (43) extends through the movable element (31) and the at least one elongated hole (36, 37). [2] Frame structure according to claim 1, wherein the movable element (31) is slidably mounted along the tube section (32). [3] Frame structure according to claim 1 or 2, wherein the rear structure (4) is operatively connected to the movable element (31), wherein a force introduction point (K1, K2) of the operative connection into the movable element (31), viewed in the direction of the upper or lower tube (9, 10), is located in front of the working means (43). [4] Frame structure according to one of the preceding claims, further comprising a lever position (20) which pivotally connects the main frame (3), the rear structure (4) and the movable element (31) such that movements (S) of the rear wheel (6) with an upward movement component are transmitted to the movable element (31) with a reduction ratio and / or a torque twisting the rear structure (4) is absorbed by the main frame (3). [5] Frame structure according to claim 4, wherein the lever position (20) has a rocker arm (22, 23) having a first, second and third pivot point (25a, 25b, 26a, 26b, 27a, 27b) in this order, wherein the first pivot point (25a, 25b) is connected via a lever (28) to the main frame (3), in particular the seat tube (8), the second pivot point (26a, 26b) to the movable element (31) and the third pivot point (27a, 27b) to the rear triangle (4). [6] Frame structure according to one of the preceding claims, further comprising a spring element (62) on which the movable element (31) is supported, wherein the movable element (31) extends at least partially through the spring element (62). [7] Frame structure according to one of claims 1 to 5, further comprising a spring element (62) which is arranged in the tube section (32) and / or upper or lower tube (9, 10) and / or is operatively connected to the damper element (50), in particular a piston rod (49) thereof. [8] Frame structure according to one of the preceding claims, wherein a service opening (56) is arranged in the tube section (32) and / or the upper or lower tube (9, 10) through which the damping element (50) and / or the spring element (62) is accessible for replacement, repair and / or maintenance thereof. [9] Frame structure according to one of the preceding claims, wherein, when the rear wheel (6) is in its initial position in the vertical direction, a force application direction (KER) of the rear structure (4) into the movable element (31) deviates by no more than 10 degrees, preferably less than 5 degrees, from the longitudinal direction (L) of the movable element (31). [10] Frame structure according to one of the preceding claims, wherein the movable element (31) has a sleeve (71) through which the tube section (32, 38) extends, wherein the sleeve (71) forms a first and a spaced-apart second seal (65, 66), wherein preferably the at least one elongated hole (36, 38) is always arranged between these seals (65, 66). [11] Frame structure according to claim 10, wherein the first seal (65) at an end of the sleeve (71) which is facing the seat tube (8) seals against the tube section (32, 38), and the second seal (66) at the end of the sleeve (71) which is facing the upper or lower tube (9, 10) seals against the tube section (32, 38, 67) or against an aperture (40) surrounding the tube section (32, 38) forming an annular gap (41). [12] Frame structure according to one of the preceding claims, wherein the working means (43) is an axle or a bolt and / or the tube section (32, 38) has two opposing elongated holes (36, 37) and the axle (43) or the bolt extends through both elongated holes (36, 37). [13] Frame structure according to one of the preceding claims, wherein the working means (43) is connected to a rod (46) which is provided to be slidably in the longitudinal direction (L) of the tube section (32, 38, 39) and is operatively connected to the damping element (50). [14] Frame structure according to one of the preceding claims, wherein the tube section (32) is detachably connected to the seat tube end of the upper or lower tube (9, 10) and the seat tube (8). [15] Frame structure according to one of the preceding claims, wherein the tube section (32) is rigidly connected to the seat tube end of the upper or lower tube (9, 10) and / or pivotably connected to the seat tube (8). [16] Frame structure according to one of the preceding claims, wherein the tube section (32) is connected to the seat tube end of the upper or lower tube (9, 10) by means of a Hirth toothing (33, 34) and / or to the seat tube (8) by means of an eye bolt connection (35). [17] Frame structure according to one of the preceding claims, wherein the rear structure (4) is articulated to the main frame (3) in the area of ​​a bottom bracket (13). [18] Bicycle (1) with a frame structure (2) according to any of the preceding claims.

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