Sliding plate suspension and sliding plate shaft

Abstract

The invention relates to a skateboard suspension (10), in particular for use in a front axle of a surfing skateboard (1), for fastening to a rotating element (50) of a skateboard (1) having a plate (40), the rotating element (50) being designed such that the skateboard suspension (10) can be rotated on the plate (40) about an axis of rotation. The sliding plate suspension (10) of the invention first comprises a connecting element (11) which is designed to fasten the sliding plate suspension (10) on the rotating element (50) in a fastening position. In addition, the skateboard shaft (20) of the invention is provided with a roller (30) which is rotatably mounted. The roller (30) is located downstream of the axis of rotation of the rotating element (50). The sliding plate suspension (10) also has a rocker arm (14) to which the at least one roller (30) is fastened, the rocker arm being fastened to the connecting element (11) by means of a first bearing (12). The first bearing (12) is arranged such that the first bearing enables vertical movement of the roller (30). The vertical movement is damped by a first elastic element (15).

Description

Technical Field

[0001] The present invention relates to a skateboard suspension, a skateboard axle, in particular a skateboard front axle, and a skateboard, in particular a surfing skateboard, having the skateboard axle according to the present invention. Background Art

[0002] Surf skating is a young trendy sport that combines elements of surfing (wave riding) and skating. Inspired by the idea of ​​transferring the typical sequence of movements of surfing to roller skating, so-called surfboards were created, which more or less enable people to move on a skateboard by imitating the swinging and rhythmic movements of a surfer.

[0003] In contrast to conventional (street) skating with conventional skateboards, acceleration in the direction of travel is not generated by stepping on (in technical language called "pushing") the pedals, but by driving on the curve with a targeted change in the moment of inertia about the axis of rotation of the curve. By stretching and curling the body along the axis where gravity and centrifugal forces are in stable balance, the moment of inertia can be changed and thus rotational acceleration can be generated. If the center of gravity of the body is kept low when entering the curve and is therefore outside the orbit around the center of the curve, the center of gravity can be brought closer to the axis of rotation (through the center of the curve) by stretching the body, thereby reducing the moment of inertia. By maintaining angular momentum, the turn can be accelerated. The increase in speed in the tangential direction can be converted into straight-line travel during the transition, so that speed can be built up using this technique by sequentially repeating turns in alternating directions.

[0004] Various forms of skateboards are known in the prior art, which are optimized for the above-mentioned movement sequence in order to convey the most realistic surfing feeling to the skateboard. Figures 1a and 1b show a surfing skateboard 1 according to an embodiment of the prior art, which has a rear skateboard axis and a front skateboard axis 20. Two skateboard axes 20 are each provided with two rollers 30. The two skateboard axes 20 are mounted on a surfing skateboard body 40 (hereinafter referred to as board 40). The view shown in Figure 1a shows the surfing skateboard 1 from below, while the view shown in Figure 1b shows the surfing skateboard 1 from the front. The surfing skateboard 1 has a longitudinal axis y and a transverse axis x perpendicular to the longitudinal axis and also extending horizontally. The vertical axis perpendicular to the above two axes and in the vertical direction is referred to as the vertical axis z for short.

[0005] In order to advance in a straight line, that is, in the direction of the longitudinal axis y, the athlete stands on the board 40 so that his body axis extends in the direction of the vertical axis z and his body center of gravity is located on the longitudinal axis y as much as possible to avoid curve travel. If the athlete transfers his weight by tilting the body axis (for example, in the opposite direction of the transverse axis x), the board 40 is caused to roll around the longitudinal axis y, as shown by the dotted line in Figure 1b and indicated by the arrow around the longitudinal axis y in Figure 1a. The rolling motion in turn causes the skateboard shaft 20 of the surfboard 1 to twist around the vertical axis z from its zero position (that is, the position when traveling forward from a straight line), as shown by the dotted line in Figure 1a. However, all four rollers 30 are kept on the floor and do not perform any vertical movement (see Figure 1b). The rotation of the shaft forces the surfboard to take a curved path. By performing the above-mentioned series of movements, the surfboard 1 can be accelerated.

[0006] In order to enable the described rotation of the skateboard axle, the skateboard axle has a corresponding bearing with elastic elements, which exert a force on the skateboard axle when turning, which counteracts the rotational movement of the axle and acts in the direction of the zero position (neutral position) of the axle. The axle of a surfboard, which is relatively special compared to the axle of a conventional skateboard, has a significantly softer elastic element, which allows a tighter turning radius, but places higher demands on the athlete's sense of balance.

[0007] According to the prior art, a surfboard is in many ways very close to the typical movements of surfing. One component of the complex movement sequence that cannot be achieved with a surfboard according to the prior art is the pumping movement transmitted by the person to the board, which, in combination with the buoyancy of the water, causes the surfboard to oscillate around a transverse axis. This movement, which can also be called a pitching movement of the board, helps on the one hand to find a better rhythm when turning and supports the change in the height of the body's center of gravity when turning as mentioned above. On the other hand, this effect can be used to obtain better acceleration regardless of the turn. The described pumping movement is a very typical movement of surfing and is therefore not included in any other related board sports type, such as snowboarding, wakeboarding or traditional skateboarding. It is therefore essential for the feeling of movement when surfing.

[0008] In addition, surfboards according to the prior art are optimized for specific speeds and therefore specific turning radii due to the corresponding suspension and axles. This means that a surfing-like movement sequence can only be fully realized within these speed ranges designed for this purpose.

[0009] Also known from the prior art is the concept of being only equipped with front wheels, such as disclosed in patent application EP2186553A1. However, such a concept also cannot make up for the above-mentioned disadvantages. Summary of the invention

[0010] In view of the described prior art, it is therefore an object of the present invention to provide an alternative skateboard suspension, an alternative skateboard axle and an alternative skateboard, with which the disadvantages pointed out in the prior art can be eliminated.

[0011] This object is achieved by the subject matter of the independent claim. Advantageous further developments of the invention are contained in the dependent claims.

[0012] The skateboard suspension according to the invention is used to be fastened to a rotating element of a skateboard having a plate, wherein the rotating element is designed so that the skateboard suspension can rotate on the plate around an axis of rotation. The rotational movement on the plate is understood here as a rotational movement substantially around the vertical axis of the skateboard, i.e. a rotational movement in a plane formed by a longitudinal axis and a transverse axis. "Substantially around the vertical axis" here means that the maximum deviation is 45°. The skateboard suspension according to the invention first has a connecting element, which is designed to fasten the skateboard suspension to the rotating element. In addition, the skateboard suspension according to the invention has a rotatably mounted roller. The roller axis of the rotatably supported roller is located in a plane formed perpendicular to the axis of rotation of the rotating element. The roller is positioned downstream of the axis of rotation of the rotating element, i.e. behind the axis of rotation in the longitudinal direction of the plate in the direction of travel. This type of downstream positioning is also called the kingpin castor angle (Nachlauf) or the kingpin castor angle principle and is known, for example, from shopping carts. Furthermore, the skateboard suspension according to the invention has a rocker arm, to which at least one roller is fastened and which is fastened to the connecting element via a first bearing. The first bearing is arranged in such a way that it enables a vertical movement of the roller, i.e. a movement in the direction of the vertical axis of the skateboard. The vertical movement is elastically supported by the first elastic element.

[0013] By means of the vertical mobility of the spring-buffered rollers according to the invention, the vertical pumping movement of the athlete is transmitted to the board, whereby a riding experience of a surfboard can be produced, which is significantly closer to the sequence of movements of surfing in terms of the complexity of surfing than a conventional surfboard according to the prior art. In addition, the skateboard suspension according to the invention makes it possible to perform acceleration movement sequences at different speeds and different curve radii. Using the skateboard suspension according to the invention, the duration during which the angular momentum conservation effect comes into play can be influenced by the athlete and is therefore prolonged compared to the embodiments of the prior art. It is thereby possible to drive at a lower frequency rhythm, which results in acceleration and thus an increase in the overall speed.

[0014] In an advantageous embodiment of the invention, the roller is mounted rotatably about the longitudinal axis of the rocker arm together with the suspension fastened to the rocker arm. In this way, the orientation of the roller can be improved, in particular in narrow curve radii, which means that material wear on the roller can be reduced due to lower lateral accelerations. This embodiment is particularly advantageous in which a rotational movement of the suspension about the longitudinal axis of the rocker arm is possible if this rotational movement is damped and / or damped by a correspondingly arranged elastic element, and this damping or damping is in particular adjustable. The elastic element is therefore arranged to counteract forces that oppose the rotational movement.

[0015] Furthermore, an advantage of an embodiment of the present invention is that the first bearing enables the rocker arm to rotate about a horizontal axis in the zero position of the skateboard suspension. The horizontal axis is here any axis that is located in a plane spanned by the transverse axis and the longitudinal axis. In a simple form of this embodiment, a horizontally arranged axis is provided on the connecting element, about which the rocker arm can rotate. Since the roller is connected to the rocker arm, the movement of the roller can be achieved at least partially in the vertical direction (i.e., vertical movement). However, the present invention is not limited to this embodiment of the vertical movement of the roller. For example, it is also conceivable to elastically mount the rocker arm in a linear guide, wherein the linear guide is understood here as the first bearing. It is also conceivable to design the rocker arm directly as a linearly guided and spring-loaded (telescopic) rod.

[0016] The first elastic element is preferably designed in the form of a spring, in particular a helical spring. Springs are widely used, inexpensive components that are available in a variety of well-defined strengths and sizes. They have a long service life and low wear and are therefore ideal elastic elements. The spring can be easily integrated into the bearing structure, thus contributing to a compact design of the skateboard suspension.

[0017] An embodiment with a spring is particularly preferred if the spring is preloaded and the preload of the spring is in particular adjustable. This means that the axle can be adjusted and adapted to the preferences of the athlete or his body type in terms of weight and strength.

[0018] In an advantageous embodiment of the invention, the skateboard suspension has, in addition to the first elastic element, a damping element which is designed to damp a vertical movement of the roller.

[0019] Advantageously, the skateboard suspension has only a central roller. This ensures that the board has a higher inclination when turning with a small radius. However, embodiments with two or more rollers are also conceivable.

[0020] Furthermore, the skateboard suspension preferably has two rollers, particularly preferably arranged in parallel, which are connected via a common axis. The shaft is preferably rigidly connected to the rocker arm or forms a part thereof.

[0021] Preferably, a third bearing is also provided, which enables the bearing or the rocker arm or a part of the rocker arm to rotate around an axis that deviates from the longitudinal axis of the skateboard by less than 60 degrees in each deflection position. This enables rotation around an axis that essentially corresponds to the longitudinal axis of the skateboard, which further optimizes the driving behavior to imitate the feeling of a surfboard when surfing. Preferably, an elastic element is provided here, which generates a force that resists rotation. Such an embodiment can ensure that when two rollers are used on the skateboard suspension, the two rollers do not lose contact with the ground even in sharp turns. The third bearing member or the third bearing can be arranged at different points in the connecting element and the rocker arm. It can also be arranged between the board and the connecting element. In addition, in one embodiment of the invention, it is conceivable to combine different bearings and represent them, for example, using ball joints.

[0022] In a preferred embodiment of the present invention, the first bearing and / or the third bearing of the rocker arm are arranged offset in the longitudinal direction of the skateboard relative to the rotating element that enables the skateboard suspension to rotate substantially around the height axis (vertical axis) of the skateboard. Therefore, the first bearing and / or the third bearing are arranged in front of or behind the rotating element in the longitudinal direction.

[0023] The skateboard axle of the skateboard with a board according to the invention has at least one skateboard suspension according to the invention and at least one swivel element, which is designed so that the skateboard suspension can be swiveled on the board. As described above, by using such a skateboard axle, the action sequence of surfing on a skateboard can be closely imitated with the corresponding axle.

[0024] In an advantageous embodiment of the skateboard axle according to the invention, the swivel element has a second elastic element, which is designed to provide a force that resists the swivel of the skateboard suspension on the board. This ensures that the skateboard suspension always returns to a neutral position without the application of external forces. The intermediate position (zero position) is preferably defined so that the roller is at the height of the longitudinal axis in the direction of the transverse axis of the skateboard. The second elastic element can also provide a force when turning, which helps the athlete to turn the turn into straight driving and then turn into the opposite direction.

[0025] The second elastic element is preferably designed as a spring, in particular a helical spring. As mentioned above, springs are widely available and inexpensive components with various well-defined strengths and sizes. They have a long service life and low wear and are therefore ideal elastic elements. The spring can be easily integrated into the bearing structure, thus contributing to a compact design of the skateboard axle. It is particularly preferred that the spring is preloaded and the preload can be adjusted.

[0026] Also preferred is an embodiment of the skateboard axle in which the rotary element has, in addition to the second elastic element, a second damping element which is designed to damp a rotary movement of the rocker arm on the board.

[0027] In an advantageous embodiment of the invention, the axis of rotation of the swivel element and thus of the skateboard suspension on the board is arranged at an angle to the vertical axis of the board. The axis of rotation therefore does not coincide with the vertical axis. By adjusting the axis of rotation to the vertical axis, the ride characteristics of the skateboard can be adjusted and adapted to personal preferences. Furthermore, by adjusting the axis of rotation to the vertical axis, a restoring moment is generated, which moves the skateboard axis in the direction of the zero position during travel, i.e. the neutral position without turning. The range of angles that can be set to achieve optimal ride characteristics is between 15 and 40 degrees compared to the vertical axis.

[0028] In another advantageous embodiment of the skateboard axle according to the invention, the swivel element has a fastening section and a swivel section, wherein the fastening section is firmly, i.e. immovably, connected to the board and the skateboard suspension is fastened to the swivel section via the connecting element. Further, in this embodiment, a swivel bearing for enabling a rotation between the skateboard suspension and the board is arranged between the fastening section and the swivel section. Such an embodiment has the advantage of a simple geometry, whereby the position of the roller relative to the fastening point can be determined by the size of the swivel section. Here, swivel sections of different sizes can be installed in order to be able to adjust the position of the roller and thus the geometry of the castor angle. In addition, the described embodiment has the advantage of interchangeability of the different components in the event of damage.

[0029] Skateboard according to the present invention has at least one skateboard axle according to the present invention. Skateboard axle is particularly intended as the front axle of the skateboard. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Aspects and advantageous embodiments of the present invention are explained in more detail below with reference to the accompanying drawings. In the drawings:

[0031] FIG. 1a shows a bottom view of a surfboard 1 according to the prior art;

[0032] FIG. 1 b shows a front view of the surfboard 1 according to FIG. 1 a ;

[0033] Figure 2a A schematic diagram of a first embodiment of a surfboard 1 according to the invention is shown in a perspective view from below;

[0034] Figure 2b The side view shows the Figure 2a A schematic diagram of a surfboard 1 according to the present invention;

[0035] Figure 3A representation of a second embodiment of a surfboard 1 according to the invention is shown in a detailed perspective view;

[0036] Figure 4 A schematic diagram of a further embodiment of a skateboard 1 according to the invention with a skateboard suspension 10 according to the invention is shown. DETAILED DESCRIPTION

[0037] 1a and 1b have been described in more detail in explaining the prior art, and therefore, a repeated description is omitted here.

[0038] Figure 2a and 2b A schematic diagram of a first embodiment of a surfboard 1 according to the present invention is shown. Figure 2a Here, a surfboard 1 is shown in a bottom perspective view, and Figure 2b 1a and 1b also apply to the surfboard 1. Figure 2a , 2b and 3.

[0039] according to Figure 2a and Figure 2b The surfboard 1 according to the invention has here a conventional skateboard axle 20 according to the prior art with two rollers 30 fastened thereto as a rear axle, a board 40 and a skateboard axle 20 according to the invention as a front axle. The skateboard axle 20 according to the invention consists of a skateboard suspension 10 according to the invention and a swivel element 50. A rocker 14 is connected to a connecting element 11 via a first bearing 12, wherein a roller 30 is arranged on the rocker 14, which can be rotated around a horizontal axis via a corresponding roller suspension on the rocker 14. The position of the roller 30 is arranged here behind the fastening position of the skateboard axle 10 on the board 40 in the direction of travel along the longitudinal axis y (positive direction of the longitudinal axis y). Therefore, the roller 30 is located downstream of the fastening position. The skateboard suspension 10 also has a connecting element 11 connected to the swivel element 50. The swivel element 50 is connected to the board 40 and has a second bearing 53.

[0040] The first bearing 12 enables the rocker arm 14 to rotate about a horizontal axis, thereby enabling the roller 30 to move vertically on the skateboard suspension 10, i.e. in the direction of the vertical axis z. Strictly speaking, even if the roller 30 in the embodiment shown moves on a circular path around the first bearing 12 of the rocker arm 14, it also performs a vertical movement in the sense of the present application. A first elastic element 15 is arranged between the plate 40 and the rocker arm 14, which elastically bears the vertical movement of the roller 30 or the rotation of the rocker arm 14. If the roller 30 deflects in the vertical direction from the zero position shown, the first elastic element 15 applies a force or a torque to the rocker arm 14 that is opposite to this deflection, and the rocker arm 14 tries to bring the rocker arm 14 and the roller 30 back to the zero position.

[0041] On the other hand, the second bearing 53 enables the skateboard suspension 10 including the rocker arm 14 to rotate horizontally, i.e. about the vertical axis z. This movement is also damped by the second elastic element 54, which applies a force or moment acting opposite to the movement of the skateboard suspension 10 when it moves in horizontal rotation from the zero position shown.

[0042] The sequence of movements for controlling the surfboard 1 corresponds to the sequence of movements for using a conventional surfboard that has already been explained above with respect to the prior art. If the athlete shifts his center of gravity along the transverse axis x from the longitudinal axis y, a rolling movement of the board 40 about the longitudinal axis y is also generated here. This rolling movement is accompanied by a horizontal rotation of the rocker 14 about the second bearing 53 and, therefore, by a deflection of the roller 30 of the skateboard axle 10 from the longitudinal axis y. The surfboard 1 is thus forced to turn. The surfboard 1 experiences a restoring moment that opposes the rolling movement via the rear axle of conventional design and partly via the second elastic element 54. Since there is only one roller 30 on the front axle, the surfboard 1 can easily tip over. Therefore, the athlete must maintain balance when turning under the influence of centrifugal force and gravity, similar to surfing.

[0043] Unlike the conventional concept of a surfboard 1, the athlete can perform a pumping motion by moving the body's center of gravity along the vertical axis z using a squat-like motion, which is cushioned by the first elastic element 15. The pumping motion is a motion of the athlete on the board, with which the center of gravity moves up and down along the vertical axis. This motion causes a relative vertical motion between the board 40 and the roller 30 on the skateboard axle 20 according to the invention. Thus, the athlete can compress the first elastic element 15 by lowering the body's center of gravity when entering a curve, and utilize the energy stored in the first elastic element 15 by raising the body's center of gravity again when turning. The lowering and raising of the body's center of gravity describes a pumping motion. This produces a supporting effect when stretching the body to change the moment of inertia, and produces a useful and easily adjustable rhythm setting.

[0044] Another advantageous aspect is that the use of the surfboard 1 according to the invention described herein for cornering acceleration can effectively utilize different frequencies or curve radii. This ensures a realistic surfing feeling at different speeds and curve radii.

[0045] Figure 3 A diagram of a second embodiment of a surfboard 1 according to the invention is shown in a detailed perspective view. A board 40 with a board axle 20 is shown, which consists of a board suspension 10 and a rotation element 50. The board suspension 10 has a connecting element 11, which is provided for fastening the board suspension 10 to the rotation element 50. The board suspension 10 and the rotation element 50 together form the board axle 20. In the configuration shown, the board axle 20 is in the zero position.

[0046] Furthermore, the skateboard suspension 10 has a rocker arm 14 with a fork 141, which is connected to a sliding ring 142 on one side of the fork 141 and to a connecting element 11 on the opposite side. Furthermore, a roller suspension 31 is arranged on the rocker arm 14. In the roller suspension 31, a roller shaft 311 is arranged, which is arranged horizontally in the zero position of the skateboard shaft and rotatably supports the roller 30. In other words, the roller shaft 311 is located in a plane formed by the rotation axis perpendicular to the rotation element 50. A rigid connecting rod is arranged between the roller suspension 31 and the connecting element 11, and the sliding ring 142 is movably arranged on its longitudinal axis. A first elastic element 15 in the form of a spring is arranged between the sliding ring 142 and the connecting element 11, which is wound on the connecting rod. The lower boundary 16 of the spring can be adjusted along the longitudinal axis of the rigid connecting rod, for example by a thread on the rigid connecting rod. By changing the position of the lower boundary 16, the preload of the spring can be adjusted.

[0047] The rocker arm 14 in the embodiment shown is designed as an integral connection, but in other embodiments this can also deviate from this and, for example, be designed as a multi-component and composite component. In addition, other possibilities for providing elastic elements are also conceivable, for example in which a helical spring is provided in the fastening point between the rocker arm 14 and the connecting element 11. In addition, if the fork 141 of the rocker arm 14 is directly connected to the roller suspension 31, a rigid connecting rod can be omitted.

[0048] Figure 3In the embodiment of the present invention, the rotating element 50 has a fastening section 51 and a rotating section 52, wherein the fastening section 51 fastens the skateboard shaft 20 as a whole to the board 40, and the rotating section 52 is fastened to the connecting element 11. The fastening of the fastening section 51 to the board 40 and the fastening of the connecting element 11 to the rotating section 52 are achieved by screw connection in the embodiment shown, but other forms are also conceivable. The second bearing 53 is arranged between the rotating section 52 and the fastening section 51, which enables the rotating section 52 to rotate horizontally, thereby enabling the skateboard suspension 10 to rotate horizontally. A second elastic element 54 ( Figure 3 ), which applies a force to the skateboard suspension 10 in the direction of the zero position shown when the skateboard suspension 10 rotates.

[0049] If the surfboard 1 is loaded by the body weight of the athlete, the roller 30 moves vertically, which is achieved by the rotation of the rocker 14 about the first bearing 12. For this purpose, the rocker 14 rotates about its fastening on the connecting element 11, so that the spring (elastic element 15) is pressed in here with the sliding ring 142. The rigid connecting rod between the roller suspension 31 and the connecting element 11 also rotates about its fastening on the connecting element 11, whereby the roller 30 undergoes a vertical movement elastically supported by the spring. By means of the adjustable lower limit 16, the preload of the spring and thus the force required for a specific deflection of the roller can be adjusted.

[0050] If the athlete performs the above-mentioned pumping movement, this leads to a constant change in the distance between the board 40 and the roller 30 according to the pumping movement. This movement is supported by the first elastic element 15. By shifting the weight from the longitudinal axis y in the direction of the transverse axis x, a rotation of the rotating element 50 and thus of the skateboard suspension 10 on the board 40 is caused, and the skateboard 1 is forced onto a curved path. As a result of this turn, the roller axis 311 is no longer in a horizontal arrangement, as is the case in the zero position of the axis shown. The second elastic element 54 generates a force that acts opposite to the rotation of the skateboard suspension 10, thereby helping the driver to transform the turn into a straight run and finally into a reverse turn, thereby accelerating the skateboard 1.

[0051] Figure 4 A further embodiment of a skateboard 1 according to the invention is shown with a skateboard suspension 10 according to the invention. This embodiment corresponds largely to Figure 2a and Figure 2b That is why only the differences between the embodiments will be discussed at this point. Figure 2a and 2b design.

[0052] Firstly, the embodiment of the skateboard suspension 10 and the skateboard 1 provides two rollers 30 on the front axle. They are arranged parallel to each other (i.e. concentrically) in the x-direction and connected to a common axle. The axle is firmly connected to the swing arm 14 and can, for example, be designed as one component, i.e. integrally with the swing arm 14. For the sake of clarity, the front rollers 30 in the drawing plane are shown by dashed lines. Figure 2a As in the embodiment of the present invention, a first bearing 12 is also provided between the connecting element 11 and the rocker arm 14, which enables the rocker arm 14 and the roller 30 to rotate around the first bearing 12 in the x direction, i.e., in the transverse direction of the skateboard. A first elastic element 15 is also provided here, which applies a force to the rocker arm 14, which force is guided so that the rocker arm enters the starting position. When the elastic element 15 deflects from the starting position, the force acting from the elastic element 15 thus counteracts the movement. The first elastic element 15 can be supported on the plate 40 here, as described in accordance with Figure 2a Embodiment, or supported on the connecting element 11, such as Figure 4 shown.

[0053] Usually, in addition to the elastic element, a damping element can also be provided, which damps the corresponding movement on the bearing and thus extracts energy from the movement.

[0054] In addition, according to Figure 2a Compared to the embodiment of the invention, the connecting element 11 is designed to be angled, wherein the angle is designed such that a part of the connecting element 11 is oriented backwards in the direction of the longitudinal axis y in the starting position. This ensures that the roller 30 is positioned in the direction of the longitudinal axis y behind the second bearing 53, which represents the connection between the plate 40 and the connecting element 11. The term "angled" is to be understood here as meaning that the connection to the rocker arm 14 is displaced in the direction of the longitudinal axis y in the undeflected state compared to the connection point between the connecting element and the plate. This can be achieved with a connecting element 11 designed as an angle with a simple construction.

[0055] Furthermore, a third bearing 13 is arranged in the connecting element 11, which enables the two parts of the connecting element 11 connected by the third bearing 13 to rotate substantially around the longitudinal axis y of the surfboard 1 in the undeflected state. "Substantially around the longitudinal axis y of the surfboard 1" is understood here as a rotation of the rotation axis deviating from the longitudinal axis y of the surfboard 1 by a maximum of 60 degrees when the surfboard 1 is in the undeflected state. As shown in the figure, the rotation at this third bearing 13 is preferably braked by a further elastic element, which applies a force opposite to the rotation to the rotating part and brings it back to the starting position as soon as the deflection force disappears. The angled connecting element provides an offset in the longitudinal direction y of the surfboard 1 between the rotating element 50 and the third bearing 13 in the undeflected state. The angled connecting element 11 is here only one way to produce this offset and the invention is not limited thereto.

[0056] Other embodiments of the invention are also conceivable here, in which the third bearing 13 is formed at a different location of the connecting element 11 or is formed as part of the rocker 14, in which the third bearing 13 then allows a rotation substantially about the longitudinal axis of the rocker 14. In addition, in another embodiment, the third bearing 13 can be arranged between the plate 40 and the connecting element 11. It is also conceivable to provide the first bearing 12 and the third bearing 13 as bearings each having a corresponding degree of rotational freedom. In addition, embodiments are conceivable in which the first bearing 12, the second bearing 53 and the third bearing 13 are formed in one bearing, for example in a ball joint.

[0057] The third bearing 13 is understood here to be any bearing capable of rotating the rocker arm 14 or a part of the rocker arm 14 or the connecting element 11 (in the case of being positioned between the plate and the connecting element) about an axis which deviates from the longitudinal axis y of the skateboard by an angle of less than 60 degrees in each possible deflection position. It thus provides a degree of rotational freedom in each possible position during driving operation, whose vector contains a y component in the global coordinate system (longitudinal direction of the skateboard). By providing three bearings, their axes of rotation span 3-dimensional space and are linearly independent of each other from a vector point of view.

[0058] Deviating from the embodiment of the invention shown in the figures, embodiments of the invention are also conceivable in which the connecting element 11 has been connected to the plate 40 of the skateboard 1 at an angle other than 90 degrees.

[0059] Reference numerals list

[0060] 1. Surfing Skateboard

[0061] 10 Skateboard Suspension

[0062] 11 Connecting elements

[0063] 12. First bearing

[0064] 13 Third bearing

[0065] 14 Rocker arm

[0066] 141 Fork

[0067] 142 Sliding ring

[0068] 15. First elastic element

[0069] 16 Lower Boundary

[0070] 20 Skateboard Axle

[0071] 30 Roller

[0072] 31 Roller suspension

[0073] 311 Shaft

[0074] 40 Plates

[0075] 50 Rotating element

[0076] 51 Fastening section

[0077] 52 Rotation Segments

[0078] 53 Second bearing

[0079] 54 second elastic element

[0080] x horizontal axis

[0081] y longitudinal axis

[0082] z vertical axis

Claims

1. A skateboard suspension (10) for fastening to a rotating element (50) of a skateboard (1) having a plate (40), wherein The rotating element (50) is configured to enable the skateboard suspension (10) to rotate on the board (40) about a rotation axis, and the skateboard suspension (10) comprises: a connecting element (11) configured to fasten the skateboard suspension (10) at a fastening position of the rotating element (50), at least one rotatably mounted roller (30), wherein said roller (30) is located on said plate (40) downstream of the axis of rotation of the rotating element (50), A rocker arm (14), the roller (30) being fastened to the rocker arm, and the rocker arm being fastened to the connecting element (11) via a first bearing (12), wherein the first bearing (12) of the rocker arm (14) is arranged so that the first bearing can realize vertical movement of at least one roller (30), wherein the vertical movement is elastically supported by a first elastic element (15).

2. A skateboard suspension (10) according to the preceding claim, wherein: The roller (30) is rotatably mounted about the longitudinal axis of the rocker arm (14).

3. A skateboard suspension (10) according to any one of the preceding claims, wherein: The first bearing (12) enables the rocker arm (14) to rotate about a horizontal axis.

4. A skateboard suspension (10) according to any one of the preceding claims, wherein: The first elastic element (15) is provided in the form of a spring, in particular in the form of a helical spring, wherein the preload of the spring is in particular adjustable.

5. A skateboard suspension (10) according to any one of the preceding claims, wherein: In addition to the first elastic element (15), a first damping element is also provided, wherein the first damping element is configured to damp the vertical movement of the roller (30).

6. A skateboard shaft (20) of a skateboard (1), comprising a plate (40), wherein the skateboard shaft comprises At least one skateboard suspension (10) according to any one of the preceding claims, At least one rotation element (50) is arranged to enable the skateboard suspension (10) on the board (40) to rotate about a rotation axis.

7. The skateboard axle (20) according to the preceding claim, wherein: The rotating element (50) has a second elastic element (54), which is configured to provide a force acting opposite to the rotation when the skateboard suspension (10) rotates on the board (40), wherein the second elastic element (54) is preferably designed in the form of a spring, particularly preferably in the form of a helical spring.

8. The skateboard axle (20) according to the preceding claim, wherein: A second damping element is provided, which is configured to dampen rotational movement of the skateboard suspension (10) on the plate (40).

9. The skateboard axle (20) according to any one of the preceding claims 6 to 8, wherein: The rotation axis of the skateboard suspension (10) on the board (40) is arranged at a specific angle relative to the vertical axis (z) of the board (40), in particular an angle between 15 degrees and 40 degrees.

10. A skateboard (1) comprising at least one skateboard axle (20) according to any one of the preceding claims 6 to 9, wherein: The skateboard axle (20) is here in particular provided as a front axle.

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