Roller having a roller wheel having a roller axis and

Abstract

The invention relates to a roller (1), in particular a steering wheel, comprising a running wheel (2) having an axis of rotation (y) and a running surface (15), a locking element (34) having a pawl (35) being provided, and the locking element (34) being displaceable between a release position, in which the pawl acts on the running surface (15) in order to lock the running wheel (2), and an engagement position, in which the pawl acts on the running surface (15) in order to lock the running wheel (2). The pawl (35) can be moved from a locking initial position into a locking end position in an engaged position as a result of a rotational movement of the running wheel (2) itself while being supported on a locking element (34), the locking element (34) having a support surface (47) for the pawl (35), the locking pawl (35) has a counter bearing surface (58) which interacts with the bearing surface (47).

Description

Technical Field

[0001] The present invention relates to a roller, in particular a steering wheel, which has a running wheel with a rotation axis and a running surface, wherein a locking element with a locking pawl is provided, and the locking element can be moved between a release position and an engagement position, in which the locking pawl acts on the running surface to lock the running wheel, and wherein the locking pawl can be moved from a locking initial position to a locking terminal position in the engagement position due to the rotational movement of the running wheel itself while being supported on the locking element, and wherein the locking pawl is designed to be wedge-shaped in a cross section of the rotation axis shown in a dotted manner, and the locking element has a support surface for the locking pawl, and the locking pawl has a corresponding support surface that cooperates with the support surface.

[0002] The present invention also relates to a roller, in particular a steering wheel, comprising a running wheel with a rotation axis and a running surface, wherein a locking element with a locking pawl is provided, and the locking element is movable between a release position and an engagement position, in which the locking pawl acts on the running surface to lock the running wheel, wherein the locking element is designed as a first lever member of a toggle mechanism and is rotatably connected to a second lever member of the toggle mechanism in an elbow joint, and wherein when the toggle mechanism moves from a first position with a larger angle to a second position with a smaller angle, the acting element moves the locking pawl to the engagement position. Background Art

[0003] The roller of the type described is known, and is further known as a steering wheel in a design scheme in particular. The roller has a running wheel preferably rotatably fixed in a wheel fork. In the case of a steering wheel, the running wheel can be deflected around a vertical axis. The wheel fork can, for example, have an assembly pin, by which the roller can be arranged on a frame. The running wheel can be rotationally locked relative to the running wheel geometric rotation axis by the locking pawl of a locking element, for which the locking pawl can be brought into an engaged position cooperating with the running surface of the running wheel. In this case, a wedge-shaped effect of the locking pawl can be generated between the locking element and the running surface of the running wheel. In this regard, for example, reference is made to EP 3 572 239 A1 (US10 857 833 B2) and EP 0 364 732 A1. A roller is known from documents DE 39 08 313 U1 and DE 79 24 594 U1, in which the locking pawl can be brought from a release position to an engaged position by a toggle mechanism.

[0004] In view of the above-mentioned prior art, the object of the present invention is to further design a roller of the above-mentioned type in an advantageous manner, in particular with regard to the effect of the locking pawl on the running wheel, in particular on the running surface of the running wheel.

[0005] According to the first inventive concept, a possible solution to the technical problem is provided by a roller, wherein it is stipulated that the support surface is designed to be longitudinally arranged along the circumference of the running wheel, and during the movement from the locking initial position to the locking terminal position, the corresponding support surface can move circumferentially along the support surface, so that the corresponding support surface as a whole is displaced circumferentially relative to the support surface in the locking terminal position and is also displaced relative to the position of the corresponding support surface in the locking initial position.

[0006] Therefore, it is advantageous to produce a support surface extending in length, which extends substantially along the curved direction of the running surface. Here, the support surface is not forced to accommodate the curved direction of the running surface, and therefore is not forced to extend concentrically with the running surface. The support surface can extend straight in its longitudinal extension, preferably in a curved manner. The support surface can also have a curvature different from the curvature of the running surface in its longitudinal extension. Therefore, with regard to the directly opposite curved area of ​​the support surface and the running surface, the curvature of the support surface can also be selected to be opposite to the curvature of the running surface. Thus, in an advantageous manner, the wedge-shaped design of the area to be filled by the locking claw between the locking element and the running surface can be produced only by the selected arrangement and design of the support surface of the locking element.

[0007] In the case where the extension of the support surface is preferably curved, preferably, the geometric center point of the curve of the support surface generated in the longitudinal extension section and extending at least partially in accordance with the circumferential line can be generated outside the locking element, if necessary, even outside the entire roller. Further preferably, the support claw can be offset around this geometric axis in the circumferential direction of the running wheel.

[0008] The following extension dimension of the support surface along the circumference of the running surface can be produced, which extension dimension can be, for example, equivalent to approximately one two hundredth or one three hundredth of the circumference of the running surface, further, for example, at least equivalent to one percent to one four hundredth or more of the circumference of the running surface, and further up to one five hundredth or one tenth of the circumference of the running surface.

[0009] Further, the extension dimension may be, for example, about 2 or 3 to 5 mm or more, further for example up to 7 mm or more.

[0010] The corresponding support surface of the locking pawl can be moved along the support surface of the locking element by this extension dimension, or the locking pawl can be moved from a locking initial position to a locking end position relative to the locking element and can be moved from a locking end position to a locking initial position relative to the locking element.

[0011] In the locking end position, the counter-support surface of the locking pawl is offset relative to the support surface of the locking element along the orientation of the support surface compared to the arrangement in the locking initial position. The offset dimension can at most correspond to the extension dimension of the counter-support surface.

[0012] In another embodiment, the support surface and the corresponding support surface can be repeated when viewed in the circumferential direction of the running surface, so that multiple surfaces can be provided if necessary, for example in the case of a relatively small extension of the support surface of a few millimeters (for example up to 4 or 5 mm) when viewed in the circumferential direction.

[0013] It can also be provided that, viewed in the circumferential direction of the running surface of the running wheel, the size of the counter-support surface of the locking pawl is smaller than or equal to the extension size of the support surface of the locking element.

[0014] According to a further inventive concept, the object is also achieved by a roller having a locking element as part of a toggle mechanism, wherein provision is made for the second position to be maintained only under the continued action of a force by the action element.

[0015] This advantageously results in the possibility that the toggle lever mechanism and thus the locking pawl are preferably automatically reset from the second position toward the first position as soon as the force action of the active element is removed. Thus, there is no stable self-holding of the toggle lever mechanism without a continuous force action. Preferably, the toggle lever element and the locking pawl are not actively moved back toward the basic position preferably defined by the first position (for example by controlled dragging).

[0016] In order to cancel the locking position or the engaged position of the pawl, the proposed embodiment merely requires the elimination of the force action on the toggle lever mechanism, thereby further advantageously enabling a simplified design of the roller as a whole.

[0017] The features of the above-mentioned independent claims are important both independently and in combination with each other, wherein the features of an independent claim can be combined with the features of another independent claim or with the features of several other independent claims, and can also be combined with only a few individual features of one or more other independent claims.

[0018] For example, a roller can be provided, wherein the support surface is constructed to extend along the circumferential longitudinal length of the running wheel, wherein, during the movement from the locking initial position to the locking terminal position, the corresponding support surface can be moved circumferentially along the support surface, so that the corresponding support surface as a whole is offset relative to the support surface in the circumferential direction in the locking terminal position and relative to the position of the corresponding support surface in the locking initial position, and wherein the locking element is also designed as a first lever member of a toggle mechanism and is connected to the second lever member of the toggle mechanism in an elbow joint, wherein, in addition, when the toggle mechanism moves from a first position with a larger angle to a second position with a smaller angle, the action element moves the locking claw into the meshing position, and wherein the second position can only be maintained under the continuous force of the action element.

[0019] Other features of the present invention are generally described below and in the description of the drawings as preferred corresponding configurations of the technical solutions of claim 1 and / or other independent claims or features of other claims. However, these features may also be meaningful only as corresponding configurations of individual features of claim 1 and / or other independent claims or corresponding other claims, or independently.

[0020] According to a possible extended design, the locking element can be used to lock the retaining opening of the pawl, which extends longitudinally along the circumference of the roller. The retaining opening can be designed as a groove, wherein, further, the surface defining the boundary of the groove can also constitute the support surface. Therefore, it is further preferred that the longitudinal extension of the groove-shaped retaining opening along the extension direction of the entire support surface can be generated.

[0021] Preferably, the retaining opening can simultaneously provide a path limitation for the movability of the locking pawl relative to the locking element.

[0022] The locking pawl itself can be designed as a double wedge in cross section and have a maximum thickness in the opposite end regions in the circumferential direction of the roller. Thus, in cross section, viewed in the direction of extension of the counter-support surface, the locking pawl has a smaller thickness in the central region than in the end regions. This can be achieved by the claw surface facing the running surface being at least approximately coaxial with respect to the running surface of the running wheel, if necessary in conjunction with the counter-support surface being curved in opposite directions in cross section for this purpose.

[0023] The thicknesses in the end regions can be selected to be identical and can correspond, for example, to approximately 1.1 to 2 times, further, for example, approximately 1.2 to 1.5 times, the thickness in the central region of the locking pawl.

[0024] Preferably, the corresponding support surface of the locking pawl can be constructed along the circumferential longitudinal extension of the running wheel. The corresponding support surface can also be formed by the upper side of one or more ribs and / or by the upper side of one or more recessed portions formed between two protuberances, possibly between the mentioned ribs.

[0025] In this case, the counter-support surface can also be composed of a plurality of surfaces separated from one another along the circumferential direction of the running wheel and / or transversely to the circumferential direction.

[0026] Further preferably, the locking pawl has a retaining protrusion that protrudes transversely to its extension along the circumference of the roller. Thereby, the locking pawl can be accommodated in a correspondingly configured retaining recess of the locking element. The accommodation is preferably movably arranged along the circumference of the running wheel.

[0027] It is further preferred to provide two holding projections which are opposite to the circumferential direction of the running wheel. Observed along the circumferential direction of the running wheel, this holding projection can also be composed of a plurality of individual projections.

[0028] Furthermore, the retaining projection is preferably configured to be longitudinally extended in the circumferential direction of the running wheel. The longitudinally extended configuration preferably means that the extension of the retaining projection in the circumferential direction is greater than the extension transversely to the circumferential direction.

[0029] According to a further embodiment, the locking pawl can also have only or additionally (at least one) reinforcement element that cooperates with the support surface. The reinforcement element can help to increase the stability of the adjustment device and / or improve the overall force transmission. For cooperation with the support surface, it can be provided that the reinforcement element engages with the retaining opening of the locking element and is optionally also guided by this opening.

[0030] Furthermore, the reinforcement element can be made of a material different from the material of the locking pawl. Preferably, a harder material is selected for the reinforcement element than the material of the locking pawl, in particular in order to improve the force transmission and increase the wear resistance. Furthermore, for example, in the case where the locking pawl (and preferably the locking element) is made of a plastic material, the reinforcement element can be made of a metal material.

[0031] The reinforcement member can be designed as a shaft as a whole, for example, preferably, at least in the region cooperating with one or more longitudinally extending retaining openings or with one or more supporting surfaces. These shaft sections (or the entire reinforcement member) can preferably have a circular cross-sectional design.

[0032] The locking pawl can be retained on the locking element by the reinforcement.Therefore, preferably by the corresponding engagement of the reinforcement with the slot-shaped retaining opening, in addition to the preferably anti-lost retention, a path limitation in terms of the movability of the locking pawl relative to the locking element can also be achieved simultaneously.

[0033] In a further preferred embodiment, two reinforcements are provided which are spaced apart from each other along the circumference of the running wheel. The two reinforcements can be engaged in retaining openings which are also spaced apart from each other along the circumference of the running wheel, or alternatively can be engaged in retaining openings which can accommodate two reinforcements at the same time and are designed for this purpose in a corresponding longitudinal manner.

[0034] The proposed design is conducive to the wedge effect in the meshing position. Here, preferably ensure that the locking element is first guided and guided into the meshing position perpendicular to the running surface of the running wheel together with the locking pawl. In this meshing position, the locking pawl can mesh with the running surface through the toothed portion of the claw face that is provided when necessary. If the running wheel that is basically locked is loaded along a rotation direction, the interaction between the locking pawl and the running surface causes the locking pawl to be dragged along the supporting surface, which causes the locking pawl to wedge between the running surface and the locking element due to the corresponding supporting surface of the locking pawl and the curve of the claw face in the opposite direction. The running wheel is locked more and more. The restriction of this dragging motion is provided by the selected thickness of the locking pawl in the end region and the stop of the shaft-shaped reinforcement on the end facing the retaining opening.

[0035] When the load to the locking element is cancelled, the locking pawl can be moved back to the middle center position along the supporting surface. This can be achieved by a spring that acts on the locking pawl accordingly.

[0036] With regard to the roller with the locking element as part of the toggle mechanism, it is further proposed that the lever elements each have a longitudinal axis and that the longitudinal axes in the second position enclose an angle of less than 180° with respect to one another. In the second position, which realizes the meshing position, the lever of the toggle mechanism is moved by the active element only to such an extent that the extended position of the lever element or even the overextended position (extended dead center position) of the lever element is not reached. In the first position (release position) of the lever elements relative to one another, an angle of, for example, about 95° to about 130° can be assumed, and in the second position (meshing position), an angle of, for example, about 115° to about 145° or up to about 160° can be assumed.

[0037] Preferably, the action element can act on the toggle mechanism in the region of the elbow joint that the lever element is rotatably connected.By applying force accordingly during the movement of the action element, the lever elements connected in the elbow joint are spread apart from each other in a manner that increases the angle surrounded.

[0038] Here, the active element can be designed as an element separate from the elbow joint mechanism. For example, the active element can be an element which is basically arranged in the steering wheel of the type described and is optionally also used to perform other functions.

[0039] The active element can also be a push rod which is preferably linearly movable along an axis which is vertical during normal operation, and further, for example, a switching push rod guided in an assembly pin, and further, for example, as a supplement or alternative to the rotational locking of the running wheel, by which the steering wheel can be rotationally locked about the aforementioned vertical axis.

[0040] Here, in a possible design, the action element can be movable between a resting position relative to the toggle mechanism, in particular a resting position on the elbow joint and a spacing position. Therefore, the toggle mechanism can be completely load-free in the release position.

[0041] Preferably, the toggle lever mechanism is moved into the engaged position of the pawl counter to the restoring force of a restoring spring acting on the toggle lever mechanism.

[0042] In particular, in the aforementioned toggle mechanism, the locking pawl, which is preferably arranged in an articulated manner on the lever-shaped locking element, is also linearly guided in such a way that it can be moved essentially perpendicularly to the running surface of the running wheel towards it.

[0043] For the purposes of the present disclosure, the ranges or value ranges or multiple ranges given above and below also include all intermediate values, in particular in steps of 1 / 10 of the corresponding dimension, if necessary dimensionless. For example, a value of 115° to 145° also includes the disclosure of 115.1° to 145°, 115° to 144.9°, 115.1° to 144.9°, etc., and a disclosure of 3 to 5 mm also includes the disclosure of 3.1 to 5 mm, 3 to 4.9 mm, 3.1 to 4.9 mm, etc. The disclosure serves on the one hand to define the lower limit and / or upper limit of the range mentioned, but alternatively or additionally also serves to disclose one or more individual values ​​in the respectively given range.

[0044] The invention is explained below in conjunction with the drawings, which however only show exemplary embodiments. Components which are described only with respect to one of these exemplary embodiments and which are not replaced by other components in other exemplary embodiments due to the particularities emphasized there are also described as at least possible existing components for the other exemplary embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In the attached picture:

[0046] Figure 1 An exploded perspective view of the roller is shown, with respect to the first embodiment;

[0047] Figure 2 A partially cutaway perspective view showing a roller of a first embodiment;

[0048] Figure 3 Show Figure 1 A separate exploded perspective view of region III in FIG. 1 , regarding the locking assembly of the roller of the first embodiment;

[0049] Figure 4 Shown by Figure 1 A cross-sectional view of plane IV in FIG.

[0050] Figure 5 Show Figure 2 Section VV in Fig. 2, about the release position of the roller;

[0051] Figure 6 Shown with Figure 5 A corresponding cross-section, but with respect to the rotationally locked position;

[0052] Figure 7 Shown with Figure 5 Additional cross-sectional views of the corresponding fully locked position;

[0053] Figure 8 Show Figure 7 A cross-sectional view of region VIII of FIG. 1 , offset perpendicularly to the plane of illustration, with respect to the locked initial position of the locking pawl of the locking assembly;

[0054] Figure 8a The locking claw is shown in accordance with Figure 8 Schematic diagram of the wedge effect in the position of ;

[0055] Fig. 9 Shown with Figure 8 Basically corresponding illustration, but with regard to the locked end positions;

[0056] Figure 9a Shown with Figure 8a The diagram is basically consistent, but the corresponding Fig. 9 location;

[0057] Fig.10 Shows additional Figure 8 A substantially corresponding illustration for a further locking end position;

[0058] Fig.10a Shows additional Figure 8a The schematic diagram basically matches the Fig.10 location;

[0059] Fig.11 showing a side view of a locking element of the locking assembly;

[0060] Fig.12 A top view showing a locking element;

[0061] Fig.13 An isolated perspective view showing a locking element;

[0062] Fig.14 A front view showing a locking pawl of the locking assembly;

[0063] Fig.15 A side view showing the locking pawl;

[0064] Fig.16 An isolated perspective view showing the locking pawl;

[0065] Fig.17 An isolated perspective view showing a lever member of the locking assembly;

[0066] Fig.18 Shown with Figure 2 A corresponding partially cutaway perspective view of a roller in a second embodiment;

[0067] Fig.19 The locking assembly of the roller of the second embodiment is shown. Figure 3 A corresponding separate exploded perspective view;

[0068] Fig. 20 Show Fig.18 A cross-sectional view of the region XX in FIG. 1 , with respect to the release position of the roller;

[0069] Fig.21 Shown with Fig. 20 A diagram that basically matches, but with respect to the fully locked position;

[0070] Fig. 22 Shown by Fig.18 Sectional view of plane XXII in ;

[0071] Fig.23 A front view showing a locking pawl of a locking assembly of a second embodiment;

[0072] Fig.24 A side view showing the locking pawl;

[0073] Fig.25 Show according to Fig.24 A cross-sectional view of line XXV-XXV in FIG.

[0074] Fig.26 An isolated perspective view of a locking pawl of a second embodiment is shown;

[0075] Fig. 27 A side view showing a second lever member of the locking assembly of the second embodiment;

[0076] Fig.28 A top view of the second lever member is shown;

[0077] Fig.29 showing an isolated perspective view of the second lever member;

[0078] Fig.30 An isolated perspective view showing a locking element of the locking assembly of the second embodiment, which is designed as a first lever member;

[0079] Fig.31 Shown with Fig. 20 A substantially corresponding cross-sectional view, but with respect to the third embodiment;

[0080] Fig.32 Shown with Figure 5 A substantially corresponding illustration of a fourth embodiment of a locking element and a locking pawl;

[0081] Fig.33 The fourth embodiment is shown in Figure 8 Corresponding illustration, regarding the locked initial position;

[0082] Fig.33a Shown with Figure 8a Corresponding illustrations, but concerning a fourth embodiment;

[0083] Fig.34 Shown with Fig.33 Basically corresponding illustration, but with regard to the locked end positions;

[0084] Fig.34a Shown with Fig.33a The diagram is basically consistent, but the Fig.34 location;

[0085] Fig.35 Shows additional Fig.33 A substantially corresponding illustration for a further locking end position;

[0086] Fig.35a Shows additional Fig.33a The schematic diagram is basically consistent, but there is no Fig.35 location;

[0087] Fig.36 A side view showing a locking element of a locking assembly of a fourth embodiment;

[0088] Fig.37 A top view showing a locking element of a fourth embodiment;

[0089] Fig.38 A bottom view showing a locking element of a fourth embodiment;

[0090] Fig.39 An isolated perspective view showing a locking element of a fourth embodiment;

[0091] Fig.40 A front view showing a locking pawl of a locking assembly of a fourth embodiment;

[0092] Fig.41 A side view showing a locking pawl of a fourth embodiment;

[0093] Fig.42 A top view showing a locking pawl of a fourth embodiment;

[0094] Fig.43 A bottom view showing a locking pawl of a fourth embodiment;

[0095] Fig.44 A perspective view showing a locking pawl with a correspondingly configurable spring according to a fourth embodiment;

[0096] Fig.45 An isolated perspective view showing a lever member of the locking assembly;

[0097] Fig.46 A top view showing a locking assembly of a fourth embodiment;

[0098] Fig.47 Shown along Fig.46 A cross-sectional view of the locking assembly of the fourth embodiment taken along line XLVII-XLVII in FIG. 1 ; and

[0099] Fig.48 A perspective view showing a locking assembly of a fourth embodiment is shown. DETAILED DESCRIPTION

[0100] First refer to Figure 1 and Figure 2 A roller 1 is shown and described, which is preferably and in the embodiment shown is designed in the form of a steering wheel.

[0101] The roller 1 basically has a running wheel 2 and a fork 3, the running wheel having a running surface 15 with a circumferential direction U, from which a cylindrical mounting pin 4 protrudes. In the deflectable design with respect to the steering wheel, the mounting pin 4 surrounds the geometric rotation axis x. In the normal use state, the mounting pin 4 also protrudes vertically upward relative to the running wheel 2.

[0102] As can be seen in the figures, the wheel fork 3 can be substantially composed of two fork housing parts 5 , 6 , wherein each fork housing part 5 , 6 has a fork arm 7 .

[0103] The fork housing parts 5, 6 of the fork 3 clamp the running wheel 2 supported in the preferably provided fork chamber 8 with their fork arms 7, which preferably substantially coincide in the direction of the rotation axis y of the running wheel 2. The running wheel 2 can be supported by a wheel axle, which passes through the running wheel 2 in the center and is preferably held at the end on the fork arms 7. The resulting geometric rotation axis y of the running wheel 2 preferably and substantially extends transversely to the rotation axis x and therefore extends substantially in a horizontal plane during normal use of the roller 1.

[0104] The roller 1 shown can be placed on a hospital bed, a mobile vehicle or the like for example. It can be fixed with a mounting pin 4 in the usual manner.

[0105] A switching cam 10 rotatably arranged about an actuation axis a can also be provided in the assembly pin 4 in the region of the upwardly pointing free end. In the case of a design as a steering wheel, the actuation axis a can extend essentially at a right angle. In the case of a design as a non-rotatable roller (also called a fixed roller), the rotation axis x corresponds to the vertical axis of the assembly pin. When the rotation axis is mentioned above and below, it should always be understood as the mentioned vertical axis also with respect to the non-rotatable design. In order to rotationally drive the switching cam 10, the switching cam 10 can have a centrally arranged non-circular coupling opening 11, which may be hexagonal according to the illustrated embodiment, through which a switching lever shaft (not shown) can pass for actuation.

[0106] For example, refer to Figure 5 As shown in the figure, a switching push rod 12 can be provided below the switching cam 10, through which the rotation locking device 13 and / or the running wheel locking device 14 can be selectively actuated or released.

[0107] The switch push rod 12 is preferably oriented about the rotation axis x in the mounting pin 4 and can be moved vertically along the rotation axis x, preferably in a rotationally fixed manner. For this purpose, the mounting pin 4 can have a reduced diameter channel 16, which is also preferably oriented about the rotation axis x and which can be adapted to the switch push rod 12 in cross section for guidance if necessary.

[0108] For example Figure 5 As shown, the free end of the switching tappet 12, which is formed between the opening of the channel 16 and the switching cam 10, can be connected, for example, by screwing, to a cam part 17. In this case, the cam part 17 can preferably have a pot-shaped shape with a preferably circular cross section, wherein a region with an increased diameter can be formed as an annular collar 18 at the end facing away from the switching tappet 12. Furthermore, with reference to the illustration, the cam part 17 of the switching tappet 12 is preferably guided vertically along the rotation axis x in the mounting pin 4.

[0109] Furthermore, the section of the cam part 17 which is reduced in diameter relative to the annular collar 18 can be surrounded by a first return spring 19, wherein one end of the first return spring 19 can be supported on the underside of the annular collar 18. The other opposite spring end can be supported on the edge of the channel 16 which is fixed relative to the cam part 17. It can thus be provided that the switching tappet 12 is subjected to a spring force in the direction of the switching cam 10 by the first return spring 19. Furthermore, preferably, the end face of the possibly provided annular collar 18 facing the switching cam 10 can have a central shaped portion in the form of a counter cam 20.

[0110] The switching push rod 12 cooperates with the control surface 21 of the switching cam 10 facing it via a preferably arranged corresponding cam 20, which can also have two control grooves 22 and 23 arranged in succession along the circumference of the switching cam 10, and the two control grooves have different depths in terms of the radial distance relative to the actuation axis a.

[0111] The switching cam 10 is limited by a stop in its rotatability observed in the circumferential direction of the control surface 21. For this purpose, as shown in the figure, the stop projection 24 on the mounting pin side can engage in the correspondingly arranged circumferential groove 25 of the switching cam 10. For example, from Figure 5 It can be seen from the illustration in that the circumferential groove 25 is arranged substantially approximately opposite the control grooves 22 and 23 with reference to the actuation axis a, wherein the circumferential groove 25 extending in the circumferential direction can also extend over an angular range of approximately 90°.

[0112] When viewed toward the running wheel 2, the switching push rod 12 preferably extends in the direction of the fork chamber 8 or into the fork chamber. The fork chamber 8 preferably surrounds a shaped portion of the switching push rod 12 that is circular in cross section and can have a larger diameter than the upper region of the switching push rod 12. This shaped portion can assume the function of a detent disk 26, which, in the case of a design as a rotating roller, can be formed on the switching push rod 12 transversely to the rotation axis x and surrounding the rotation axis.

[0113] The latching disk 26 can have a latching shaped portion 27 on its disk surface facing the switching cam 10. In the so-called Figure 6 In the fixed roller position occupied in the wheel fork 3, these latching shaped parts 27 can be pressed flatly against the lower side of the direction locking part 28 due to the spring force of the first return spring 19, in which the wheel fork 3 together with the running wheel 2 can preferably only occupy two positions offset by 180° relative to each other with respect to the assembly pin 4. The direction locking part 28 can be fixed in particular to the wheel fork 3, further for example in the following area, in which the wheel fork 3 is held as a whole on the assembly pin 4 by the bearing 29 and is held rotatably relative to the assembly pin about the rotation axis x.

[0114] The latching disk 26 and its latching shaped portion 27 , the direction locking element 28 and the rotation locking element 30 described still further below are essentially part of the rotary locking device 13 .

[0115] The fixed roller position can be assumed by rotating the switching cam 10 into a position where the counter cam 20 cooperates with the control groove 23 or other equivalent shaped parts (see Figure 6 ). Figure 5Compared to the intermediate position shown (in which the corresponding cam 20 engages with the other control groove 22), the fixed roller position can be applied according to the existing spring force of the first return spring 19 to cause the cam component 17 and the switching push rod 12 to rise and thus also cause the locking disk 26 to rise to a cooperative working position with the direction locking member 28.

[0116] On the underside of the detent disk 26 facing away from the detent shaped portion 27 , the switching tappet 12 can also have rotational locking projections 31 . These rotational locking projections can also extend, for example, coaxially with the rotation axis x in the circumferential direction of the detent disk 26 .

[0117] Viewed in the direction of the running wheel 2, a preferably circular, more preferably cylindrical projection 32 of reduced diameter compared to the detent disk 26 can correspond to the shift push rod 12 from the detent disk 26, which projection can be located in a centrally arranged passage opening of the rotary locking element 30 arranged about the rotation axis x or can engage in the passage opening. Like the direction locking element 28, the rotary locking element 30 located in the fork chamber 8 between the running wheel 2 and the detent disk 26 can also be held in a rotationally fixed manner with the wheel fork 3.

[0118] The rotary locking element 30 can have a locking receptacle 9 adapted to the geometry of the rotary locking projection 31. Preferably, the rotary locking element 30 is supported on the fork side by a spring element acting substantially in the direction of the rotation axis x.

[0119] Due to the cooperation between the rotation locking projection 31 of the locking disk 26 and the locking receptacle 9 of the rotation locking member 30, the roller 1 can be fixed in different rotational positions about the rotation axis x when it is designed as a rotating roller. For this purpose, the switching cam 10 can be deflected into the following position about its actuation axis a, in which position according to Figure 7 , the corresponding cam 20 abuts against the control surface 21 of the switching cam 10 extending radially outward in the circumferential direction. The corresponding cam 20 can move downward together with the switching push rod 12 against the force of the first return spring 19. The rotation locking projection 31 can be engaged in a correspondingly configured locking receptacle 9 in a rotationally fixed manner.

[0120] At the same time, it is also possible to achieve a rotational locking of the running wheel 2 in this position. For this purpose, a running wheel locking device 14 is used. In contrast to the illustrated diagram, the running wheel locking device 14 described in detail below can also be used alone, i.e., if necessary, without a possible rotational locking of the roller 1 about the rotation axis x. For example, in a possible design, as mentioned above, the roller 1 can be designed as a fixed roller as a whole, i.e., the roller can not have the possibility of occupying a fixed roller position (this possibility is preferably present in the case of a design as a rotating roller), for which, for example, the switching cam 10 can have only a distinct control groove 22 to define an intermediate position, and from this intermediate position, the switching cam 10 can only be twisted in one direction in order to reach the second switching position, in which the running wheel locking device 14 is activated.

[0121] Figures 1 to 17 A first embodiment of the running wheel locking device 14 is shown. Figures 18 to 30 A second embodiment is shown, and Fig.31 A combination of two first embodiments is shown as a third embodiment.

[0122] The running wheel locking device 14 first has a locking assembly 33, which has a retaining part 38, a locking element 34 and a locking pawl 35, a lever part 36 and a second return spring 37. The locking assembly 33 can be installed in an advantageous manner preassembled in the fork 3. Here, the retaining part 38, which preferably substantially retains the other components listed, is preferably arranged in the fork 3 in a rotationally fixed manner relative to the rotation axis x.

[0123] First, with reference to the first embodiment, the lever element 36 is rotatably held on a holding element 38. For this purpose, a shaft 39, for example, which is received at the end in the holding element 38, can be used, about which the lever element 36 can be rotated about a geometric axis of rotation b, which preferably extends in the same direction as the axis of rotation y of the running wheel 2.

[0124] The end of the lever part 38 facing away from the receiving axis 39 is also rotatably received in the locking element 34, for example in a groove-shaped receiving portion 40 of the locking element 34, for example using a pin 41. The geometric rotation axis c in this connection extends parallel to the above-mentioned rotation axis b.

[0125] The locking element 34 can have two guide walls 42 spaced apart from one another in the direction of the rotation axis c. The guide walls are connected to one another, preferably rigidly, if necessary via a core section 43 which also has the above-described groove-shaped receptacle 40 .

[0126] One or two guide parts, preferably two guide ribs 44 in each case, can be formed on the wall outside of the guide wall 42, which accommodate, at a distance from one another, a counter part, preferably formed on the holder 38, between them, which is designed, for example, as a counter rib 45. This essentially results in a linear guidance of the locking element 34 on the holder 38. Figure 5 and Figure 6 The release position shown is the same as Figure 7 The direction of movement r between the meshing positions shown preferably extends at an angle α of approximately 30 to 60°, further approximately 45°, to the rotation axis x. As a result, and also due to the selected arrangement of the holder 38 in the fork 3, it is possible to transport the locking element 34 together with the locking pawl 35 arranged thereon substantially in a direction perpendicular to the running surface 15 of the running wheel 2.

[0127] Like the locking element 34 , the locking pawl 35 is preferably also made of a plastic material, furthermore, is produced, for example, by an injection molding method.

[0128] In order to hold the locking claw 35 on the locking element 34, a holding opening, such as a longitudinal groove-shaped holding opening 46, can be provided on the side wall 42 of the locking element 34. Preferably, each side wall 42 can be provided with two holding openings 46 spaced apart from each other along the longitudinal direction of the holding opening 46 or along the circumferential direction U of the running wheel 2.

[0129] Referring to the cross section of the rotation axis y of the running wheel 2, which is represented as a point, further, for example, in accordance with Figure 8 In the cross section of FIG. 1 , a plurality of support surfaces 47 are generated in the holding opening 46 of the side wall 42 away from the running surface 15 of the running wheel 2, and these support surfaces extend together along an imaginary curve k. Referring to the cross section, the curve k is curved in the opposite direction to the curvature of the running wheel 15. Here, the curve k and the running surface 15 have at least approximately the same radius. In a preferred design, the radius of the curve k can be equivalent to about 0.8 to 1.2 times the radius of the running surface.

[0130] Further preferably, an interface 48 of the retaining opening 46 which is opposite the corresponding supporting surface 47 extends along a line which runs coaxially with the curve k.

[0131] As shown in the figure, when viewed along the extension direction of the curve k or along the circumferential direction U of the running wheel 2 , the retaining openings 46 may be spaced apart from each other by a certain dimension, which is substantially consistent with the extension dimension of the retaining openings 46 along the same direction.

[0132] In the projection along the direction of the rotation axis c, correspondingly perpendicular to Figure 8 In the projection onto the observation plane in FIG. 2 , the retaining openings 46 of the two side walls 42 preferably coincide with each other.

[0133] The underside 49 of each side wall 42 facing the running surface 15 can also preferably extend along a line oriented coaxially with the curve k.

[0134] The locking pawl 35 is accommodated between the side walls 42. This accommodation arrangement is achieved by shaft-shaped reinforcements 50. These reinforcements 50 are preferably made of a harder material than the locking pawl material, preferably also compared to the locking element material. Preferably, these reinforcements 50 can also be made of a metal material, for example.

[0135] Preferably, two shaft-like reinforcement elements 50 are provided, which extend through the flanks 51 of the locking pawl 34 in the region of the hole-like penetration 52 and each engage with its end in the aforementioned retaining opening 46 of the locking element 34 .

[0136] The diameter of the shaft-shaped reinforcement element 50 is preferably adapted both to the diameter of the hole-shaped passage 52 and to the radial distance between the support surface 47 of the retaining opening 46 and the opposite boundary surface 48 (cf. curve k).

[0137] The surface of the reinforcement 50 on the locking pawl side facing each support surface 47 forms a corresponding support surface 58 for the locking pawl 35 on the support surface 47 of the locking element 34. Since the cross section of the reinforcement 48 is preferably designed to be circular, a linear support on the support surface 47 is preferably produced.

[0138] The locking pawl 35 is accordingly mounted in a groove-shaped retaining opening 46 of the locking element 34 , as it were, floatingly in the circumferential direction U and can be moved in the retaining opening 46 essentially transversely to the movement direction r of the locking element 34 .

[0139] Especially according to Figure 5 and Figure 6 In the unloaded basic position, the locking pawl 35 is preferably aligned centrally relative to the locking element 34. Accordingly, in this unloaded basic position, the shaft-shaped reinforcement element 50 extends approximately in the center of the longitudinal extension of the retaining opening 46. This central basic position can be achieved by spring action, for which purpose, for example, a preferably Ω-shaped spring 53 can be provided in a configuration corresponding to the side wall 42.

[0140] Each spring 53 passes from the outside through a slot-shaped opening 54 in the corresponding side wall 42 and is inserted with its spring legs 55, which preferably extend in parallel and spaced apart from each other, into a corresponding receiving groove 56 located between the through-holes 52 of a flank 51. The spring legs 55 here abut against the side edges of the receiving groove 56 in order to preferably center the locking pawl 35 on the locking element 34.

[0141] The locking surface or claw surface 57 of the locking claw 35 pointing toward the running wheel 2 extends in the above-mentioned cross section in a manner adapted to the curved course of the running surface 15. In conjunction with the upper side 61 of the locking claw 35 adapted to the course of the curve k, and in particular in conjunction with the imaginary curve along which the corresponding support surface 58 is generated, the locking claw 35 is designed in cross section as a double wedge, which has a maximum thickness d in each of the end areas 59 opposite each other in the circumferential direction U of the running wheel 2. Approximately in the center of the circumferential direction U, the locking claw 35 has a thickness d', which can correspond, for example, to approximately 0.5 to 0.8 times the thickness d on the edge side (see also Figure 8a ).

[0142] The claw surface 57 extends in this case substantially in a manner curved in the opposite direction to the curve k.

[0143] In addition, the claw surface 57 can have sawtooth-like projections 60, which protrude beyond the substantially smooth surface. In addition, these projections are further preferably constructed in one piece with the locking claw 35 and of the same material.

[0144] Here, two groups of projections 60 can be produced, wherein a plurality of projections 60 in one group substantially assigned to the claw surface 57 at the end in the circumferential direction extend in a zigzag manner in the same direction. In contrast, the two groups of projections 60 are arranged such that the projections 60 of the two groups are away from each other, and here further point outward in the circumferential direction U.

[0145] The switch push rod 12, which forms the active element E for the running wheel locking device 14, is switched from the Figure 5 The middle position or from Figure 6 The fixed roller position of the lever 36 is lowered, preferably when the rotation locking projection 31 is simultaneously engaged in the locking receptacle 9 of the rotation locking member 30, a targeted action is applied to the lever member 36 through the protrusion 32. The action is applied directly to the end of the lever member 36 with the rotation axis c.

[0146] During the downward movement of the switching push rod 12 (acting element E), the locking element 34 and the locking pawl 35 held thereon are acted upon indirectly via the lever element 36 guided in the groove-shaped receptacle 40, so that due to the described linear guidance a linear movement of the locking element 34 and the locking pawl 35 in the direction of movement r toward the running surface 15 occurs. In particular, the locking pawl 35 is thus brought from the release position to the position according to Figure 7 and Figure 8 The sawtooth-shaped projection 60 and, if necessary, at least part of the claw surface 57 are brought into a meshing position with the running surface 15 , which bears the load of the switching push rod 12 .

[0147] The rotation of the lever part 36 about the rotation axis b caused thereby is carried out against the restoring force of the second restoring spring 37, which, as shown in the figure, can be designed, for example, as a helical torsion spring, wherein a spring arm acts on the lever part 36 and a spring arm preferably acts on a retaining part 38 fixed to the fork.

[0148] The superimposed rotational and linear displacement of the lever part 36 and the locking element 34 can be achieved by guiding the lever part 36 by means of its axle pin 41 in the groove-shaped receptacle 40 .

[0149] By constructing the longitudinal support surface 47 along the circumferential direction U of the running wheel 2 or along the curve k, when the running wheel 2 is subjected to a corresponding load in the rotation direction, the locking claw 35 can be independently moved relative to the locking element 34 along the circumferential direction U from a corresponding locking initial position (see Figure 7 and Figure 8 ) to the locked end position in order to further increase the force action on the running surface 15 by the resulting wedge effect.

[0150] Fig. 9 and Fig.10 The load f acting in the circumferential direction U (refer to Fig. 9 The diagram in the figure is in the counterclockwise direction) and the load f′ (refer to Fig.10 In the case of the two (maximum) possible locking end positions of the locking pawl 35 (in the illustration in the clockwise direction). Due to the friction fit, the locking pawl 35 is driven in the same load direction when it is guided accordingly in the retaining opening 46 by its shaft-shaped reinforcement 50.

[0151] The corresponding support surface 47 has a length g effective when viewed in the circumferential direction U or in the direction of the curve k. Figure 8 and Figure 8a In the case of the locked initial position of the schematic diagram shown, this results in a maximum possible deflection dimension h of the counter-support surface 58 of the locking pawl 35 in the two possible directions f and f′, which corresponds essentially to half the length g.

[0152] Here, according to a possible design, the offset dimension h is, for example, about 1.5 to 2.5 mm when the length g of the support surface 47 is, for example, about 3 to 5 mm. With reference to the rotation axis y of the running wheel 2, an offset of, for example, about 1.5° to 3° from the center position can be generated.

[0153] exist Figure 9a and Fig.10a The schematic diagram shows that according to Fig. 9 and Fig.10 Wedge effect with deflected locking pawl 35 .

[0154] The meshing position (whether occupying the locking initial position or the locking end position) can only be maintained under the continuous force of the action element E or the switching push rod 12 on the lever member 36. As this force is cancelled due to the lifting of the switching push rod 12, the locking element 34 and the locking pawl 35 are moved back to the release position spaced apart from the running surface 15 by the second return spring 37.

[0155] exist Figures 18 to 30 In the second embodiment shown, the locking element 34 acting on the locking pawl 35 is designed as a first lever part 62 of a toggle mechanism 63 .

[0156] The toggle mechanism 63, which also has a second lever element 64, also forms part of the locking assembly 33 together with the locking pawl 35, the retaining element 38 and the second return spring 37 in this embodiment (see also Fig.19 ), the locking assembly can be pre-assembled and installed in the fork 3.

[0157] The two lever parts 62 and 64 of the toggle mechanism 63 are connected to each other in an articulated manner in a toggle joint 65. The geometric rotation axis c generated here, more preferably the geometric rotation axis b of the second lever part 64 in the articulation region of the holder 38, preferably extends in the same direction as the rotation axis y of the running wheel 2.

[0158] In the area facing away from the elbow joint 65, the first lever part 62, which essentially forms the locking element 34, has a shaft 66 with a geometric axis of rotation m, the free end of which protrudes outwards and engages in a matching receptacle 67 of the locking pawl 35. The receptacle 67 can preferably be arranged in the area of ​​the flank 51 of the locking pawl 35.

[0159] On the outer side of the walls of these flanks 51, two guide ribs 44 extending parallel to each other are preferably formed on the locking claw 35, which cooperate with the matching corresponding ribs 35 of the retaining part 38 to linearly guide the locking claw 35 in the movement direction r (see Fig. 22 ). Thus, the preferred movement direction of the locking claw 35 can be realized substantially in a direction perpendicular to the running surface 15.

[0160] In this embodiment, the locking pawl 35 is also provided with a sawtooth-like projection 60 on the bottom side on the pawl surface 57 .

[0161] The component that exerts a moving action on the elbow joint mechanism 63 is not directly part of the elbow joint mechanism 63, but is a separate component therefrom, which is transported so as to exert an action by movement. For this purpose, preferably, as in the previous embodiment, a switching push rod 12 is used as an action element E. The working principle of this action element in achieving the roller intermediate position or the fixed roller position is as described above.

[0162] By lowering the switching push rod 12, and optionally also simultaneously engaging the locking receptacle 9 with the rotational locking projection 31, the region of the elbow joint 65 is acted upon by the projection 32 so that the toggle lever mechanism is shifted from the position according to Fig. 20 The release position, i.e. the first position in which the lever members 62 and 64 are at a greater angle relative to each other, is moved according to Fig.21 The lever members are in a second position (engaged position) in which the lever members are at a smaller angle relative to each other.

[0163] In the first position (release position), the longitudinal axis u connecting the rotation axis b and the rotation axis c encloses a (preferably obtuse) angle β with the longitudinal axis w connecting the rotation axis c and the rotation axis m. This angle can be, for example, about 95° to 130°, further, for example, about 100° to 115°.

[0164] Due to the force effect of the switching push rod 12 on the elbow joint 65, this angle is increased to an angle β' of, for example, approximately 120° to 150°, further, for example, approximately 130° to 140°. At least an angle β' is reached here that is less than 180°.

[0165] Due to the provided toggle lever mechanism 63, an increase in the pressing force of the locking pawl 35 acting on the running surface 15 can be achieved when the same force is applied by the switching push rod 12, wherein this force action in the second position of the toggle lever mechanism 63 can only be maintained when a load is continuously applied by the switching push rod 12 or by the action element E.

[0166] As the load applied by the switching push rod 12 is eliminated due to the lifting of the switching push rod, since the toggle lever mechanism 63 is in a non-extended position in the engaged position, the toggle lever mechanism 63 together with the locking pawl is automatically returned to the released position supported by the second return spring 37 acting accordingly on the second lever member 64.

[0167] Fig.31 A third embodiment is shown, in which, according to Figures 18 to 30 The toggle mechanism 63 of the second embodiment shown is similar to the Figures 1 to 17 The locking claw 35 of the quasi-floating support of the first embodiment is combined.

[0168] The locking element 34 is designed here essentially in two parts, namely on the one hand as a molded part of the floating bearing of the locking pawl 35 according to the first embodiment, which has a retaining opening 46 with a support surface 47 and on the other hand as a first lever part 62 of a toggle joint 63 .

[0169] Reference Figures 32 to 48 A fourth embodiment is shown and described with regard to the locking element 34 and the locking pawl 35 .

[0170] Reference Fig.32 First, it can be seen that although the locking element 34 is Figures 1 to 17 The locking element of the embodiment of the present invention has a retaining opening 46 in a similar manner, but the retaining opening 46 is bounded in one direction, in the rearward direction, by a locking section 68 formed on the locking element 34. The locking pawl 35 can rest against the locking section with its end face 69 when it is displaced accordingly in this direction. This displacement can be caused in particular by a spring action of the locking pawl 35 in the raised, non-engaged state, which spring action will be described below. For this purpose, the locking pawl 35 can alternatively or additionally have an overlap region 70 located at the front side in this respect, which can also be used as an alternative or in addition to the stop regions 71 and 72 for limiting the displacement relative to the locking element 34.

[0171] Further, especially from Figure 33 to Figure 35 It can be seen that the locking pawl 35 rests on the locking element 34 via preferably a plurality of corresponding supporting surfaces 58 which are formed along the circumferential length of the running wheel 2 in this exemplary embodiment, at least in the braking engaged state, on the corresponding supporting surface 47.

[0172] In this case, it is realized in the embodiment and preferably multiple, further preferably two mutually aligned counter-supporting surfaces 58. In addition, one or more counter-supporting surfaces 58 are formed on one or more ribs 73 of the locking claw 35. Preferably, a recess 74 or multiple recesses 74 are formed between the multiple ribs 73 generated transversely to the circumferential direction U. The recessed surface can be used in the same way as the counter-supporting surface 58 when the support surface 47 is adjusted accordingly.

[0173] In the fourth embodiment, it can be seen that four corresponding support surfaces 58 are preferably provided as the upper side of the ribs 73 in a transverse direction relative to the circumferential direction U of the running wheel 2 and / or three corresponding support surfaces 58 are provided as the upper side of the recesses 74 formed between the ribs 73.

[0174] Further details of the design can be found in Fig.42 and Fig.44 See.

[0175] Furthermore, a spring 53 is accommodated in the locking pawl 35, which Figures 1 to 17 The spring 53 is particularly used to move the locking claw 35 back to the position according to the first embodiment after the brake engagement is completed. Fig.33 Therefore, relative to the circumferential direction U of the running wheel 2, the spring can be used for both backward movement and forward movement.

[0176] exist Figures 32 to 42In the embodiment of the present invention, the spring 53 is also preferably configured as a U-shaped spring. The spring is further preferably locked and retained in the locking claw 35. For this reason, one or more locking overlap sections 80 can be constructed in the locking claw 35 to cooperate with the spring leg 55.

[0177] When the locking claw 35 moves out of the initial position, the spring leg 55 can abut against the protrusion 79 constructed on the locking element 34, thereby generating the spring force required for automatic reset (see also Fig.33 , 34 and 35).

[0178] The locking pawl 35 also has two preferably oppositely arranged retaining projections 75 extending transversely to the extension of the locking pawl along the circumference of the running wheel 2. These retaining projections are accommodated in the matching longitudinal guide device 78 of the locking element 34. For example, from Fig.47 It can be seen that the locking element 34 has for this purpose projections 76 which, in cooperation with one or more counter-projections 77 , provide a retaining and longitudinal guide 78 .

[0179] In the present embodiment, a double wedge-shaped cross section is also produced relative to the locking claw 35, which has a corresponding support surface 58 oriented in accordance with the curve k, which extends in the opposite direction to the running surface 15 of the running wheel 2. The claw surface 57 preferably extends in accordance with the curvature of the running surface 15. Accordingly, a thickness d' is produced in the circumferential direction U approximately in the center of the locking claw 35 between the curve k and the curvature of the claw surface 57 or the sawtooth-shaped protrusion 60 defining the claw surface 57, which thickness d' can correspond to approximately 0.5 to 0.8 times, if necessary up to 0.95 times, the thickness d of the edge side (see Fig.41 ).

[0180] Fig.35 and Fig.36 or Fig.35a and 36 The schematic diagram in a shows the load f acting in the circumferential direction U (see Fig.35 or Fig.35a The diagram in the figure is in the counterclockwise direction) and the load f′ (refer to Fig.36 or Fig.36 a) in the clockwise direction) of the two (maximum) possible locking end positions of the locking pawl 35. Here too, due to the friction fit, the locking pawl 35 is driven in the same load direction when it is guided accordingly in the longitudinal guide 78 of the locking element 34.

[0181] and Figures 1 to 17Similarly to the embodiment of the present invention, the locking element 34 has a core section 43, with which the lever member 36 engages. However, in the present embodiment, the lever member 36 is configured to be U-shaped in a central cross section transverse to the rotation axis c, corresponding to the locking element 34, and has a U-shaped opening that opens downward.

[0182] Arranged on the outside of the U-shape is the axle pin 41 already described in the first embodiment, which is preferably formed directly here and engages with the groove-shaped receptacle 40 of the locking element 34 .

[0183] In contrast to the first described embodiment of the locking element 34 and the locking pawl 35, no inherently movable parts are provided on the locking pawl 35. The locking pawl 35 is designed in one piece, except for the spring 53, which is preferably made of metal. Advantageously, it can be provided as a separate plastic injection molded part, which is slidably accommodated in the locking element 34. The anti-loss retention on the locking element 34 can be provided here in addition by the spring 53.

[0184] In addition, identical parts of this embodiment, at least identical parts in function, are provided with the same reference numerals as in the embodiment described first. In this respect, reference can also be made to the description of these parts there.

[0185] The above embodiments are used to illustrate the inventions generally included in the present application, which improve the prior art at least independently through the following feature combinations, wherein two, more or all of these feature combinations can also be combined with each other, namely:

[0186] A roller 1, characterized in that the support surface 47 is designed to be longitudinally arranged along the circumferential direction U of the running wheel 2, and during the movement from the locking initial position to the locking terminal position, the corresponding support surface 58 can move along the support surface 47 along the circumferential direction U, so that the corresponding support surface 58 is displaced as a whole relative to the support surface 47 along the circumferential direction U in the locking terminal position and is also displaced relative to the position of the corresponding support surface in the locking initial position.

[0187] A roller, characterized in that the locking element 34 has a retaining opening 46 for the locking claw 35 and the retaining opening 46 extends longitudinally along the circumferential direction U of the roller 2 .

[0188] A roller, characterized in that the locking pawl 35 is designed as a double wedge in cross section and has a maximum thickness d at opposite end regions in the circumferential direction U of the roller 2 .

[0189] A roller, characterized in that the locking claw 35 has a reinforcement member 50 that cooperates with the supporting surface 47 .

[0190] A roller, characterized in that the reinforcement member 50 is made of a material different from that of the locking claw 35 .

[0191] A roller, characterized in that the reinforcement member 50 is designed to be shaft-shaped.

[0192] A roller, characterized in that the locking claw 35 is fixed on the locking element 34 by the reinforcement member 50 .

[0193] A roller is characterized by being provided with two reinforcement members 50 which are arranged at a distance from each other along the circumferential direction U of the roller 2 .

[0194] A roller, characterized in that the corresponding support surface 58 is designed to extend longitudinally along the circumferential direction U of the roller 2.

[0195] A roller, characterized in that the corresponding support surface 58 is formed by the upper side of one or more ribs 73.

[0196] A roller, characterized in that the corresponding support surface 58 is formed by one or more upper sides of a plurality of recessed portions 74 formed between a plurality of ribs 73 .

[0197] A roller, characterized in that the locking claw 35 has a retaining protrusion 75 which protrudes transversely to the extension section thereof along the circumferential direction U of the roller 2 .

[0198] A roller, characterized in that the retaining protrusion 75 extends longitudinally along the circumferential direction U of the roller 2 .

[0199] A roller, characterized in that the retaining protrusion 75 is composed of a plurality of separate protrusions.

[0200] A roller, characterized in that the second position can only be maintained under the continuous force of the active element E.

[0201] A roller, characterized in that the lever elements 62 , 64 each have a longitudinal axis u, m, and that the longitudinal axes u, m in the second position enclose an angle β′ of less than 180° with one another.

[0202] A roller, characterized in that the action element E acts on the toggle mechanism 63 in the region of the toggle joint 65 .

[0203] A roller, characterized in that the action element E is designed as a component separate from the toggle mechanism 63.

[0204] A roller, characterized in that the action element E can be moved between a contact position and a spaced position relative to the toggle mechanism 63.

[0205] A roller, characterized in that the acting element E is designed as a linearly movable push rod.

[0206] A roller, characterized in that the push rod is designed as a switching push rod 12, and the switching push rod can also achieve rotation locking of the roller 1.

[0207] All disclosed features (as individual features or in combination of features) are essential to the invention. Therefore, the disclosure of the present application also includes the entire disclosure of the relevant / attached priority document (copy of the prior application), for which reason the features of the priority document are also incorporated into the claims of the present application. Dependent claims, by their features, can characterize unique and inventive improvements of the prior art even without the features of the cited claims, and are particularly useful for divisional applications based on these features. The invention given in each claim may additionally have one or more features that are particularly provided with reference numerals in the preceding description and / or given in the list of reference numerals. The present invention also relates to a variety of design forms, in which individual features mentioned in the above description are not implemented, especially when they are considered to be insignificant for the corresponding purpose of use or can be replaced by other means with the same technical effect.

[0208] Reference numerals list

[0209] 1 Scroll wheel

[0210] 2 Traveling wheels

[0211] 3 wheel fork

[0212] 4 Assembly pins

[0213] 5 Fork cover parts

[0214] 6 Fork cover parts

[0215] 7 Fork arm

[0216] 8 Fork chamber

[0217] 9 Locking receptacle

[0218] 10 Switching cam

[0219] 11 Coupling opening

[0220] 12 Switching the faders

[0221] 13 Rotation lock

[0222] 14 Traveling wheel locking device

[0223] 15 walking surface

[0224] 16 channels

[0225] 17 Cam assembly

[0226] 18 Annular flange

[0227] 19 First return spring

[0228] 20 Corresponding cam

[0229] 21 Control Surface

[0230] 22 control slots

[0231] 23 Control Slots

[0232] 24 Stop protrusion

[0233] 25 Circumferential groove

[0234] 26 card lock plate

[0235] 27 Lock forming part

[0236] 28 direction lock

[0237] 29 Bearing

[0238] 30 Rotation lock

[0239] 31 Rotation locking projection

[0240] 32 protrusion

[0241] 33 Locking assembly

[0242] 34 Locking element

[0243] 35 Locking claw

[0244] 36 Lever

[0245] 37 Second return spring

[0246] 38 Holder

[0247] 39 Axis

[0248] 40 Groove-shaped receiving portion

[0249] 41 Axle pin

[0250] 42 Sidewall

[0251] 43 Core Section

[0252] 44 Guide ribs

[0253] 45 corresponding rib

[0254] 46 Holding opening

[0255] 47 Support surface

[0256] 48 Interface

[0257] 49 Lower side

[0258] 50 Reinforcement

[0259] 51 Flanker

[0260] 52 penetration

[0261] 53 Spring

[0262] 54 slot opening

[0263] 55 Spring Legs

[0264] 56 Receiving slot

[0265] 57 Claw

[0266] 58 Corresponding support surface

[0267] 59 End area

[0268] 60 Raised part

[0269] 61 upper side

[0270] 62 First lever element

[0271] 63 elbow mechanism

[0272] 64 Second lever member

[0273] 65 Elbow

[0274] 66 Axis

[0275] 67 Accommodation

[0276] 68 Locking section

[0277] 69 Inner surface

[0278] 70 Overlap Area

[0279] 71 Stop area

[0280] 72 Stop area

[0281] 73 Ribs

[0282] 74 Depression

[0283] 75 Retaining protrusion

[0284] 76 Bump

[0285] 77 corresponding bump

[0286] 78 Longitudinal guide

[0287] 79 raised part

[0288] 80 Stop overlap section

[0289] a Control axis

[0290] b Axis of rotation

[0291] c Axis of rotation

[0292] d Thickness

[0293] d′ thickness

[0294] f Load

[0295] f′ Load

[0296] g Length

[0297] h Offset size

[0298] k-curve

[0299] m Rotation axis

[0300] r Movement direction

[0301] u Longitudinal axis

[0302] w Vertical axis

[0303] x Rotation axis

[0304] y axis of rotation

[0305] E Action element

[0306] U Circumferential

[0307] α Angle

[0308] β angle

[0309] β′ angle

Claims

1. A roller (1), in particular a steering wheel, having a running wheel (2) with a rotation axis (y) and a running surface (15), wherein: A locking element (34) having a locking pawl (35) is provided, and the locking element (34) can be moved between a release position and an engagement position, in which the locking pawl acts on a running surface (15) in order to lock the running wheel (2), and in which the locking pawl (35) can be moved from a locking initial position to a locking end position in the engagement position due to the rotational movement of the running wheel (2) itself while being supported on the locking element (34), and in which the locking pawl (35) is designed as a wedge in a cross section of the rotation axis (y) shown in dot form, and the locking element (34) has a locking pawl for locking the pawl. (35), and the locking claw (35) has a corresponding supporting surface (58) cooperating with the supporting surface (47), characterized in that the supporting surface (47) is designed to be longitudinally elongated along the circumferential direction (U) of the running wheel (2), and during the movement from the locking initial position to the locking terminal position, the corresponding supporting surface (58) can move along the supporting surface (47) along the circumferential direction (U), so that the corresponding supporting surface (58) as a whole is displaced relative to the supporting surface (47) along the circumferential direction (U) in the locking terminal position and is also displaced relative to the position of the corresponding supporting surface in the locking initial position.

2. The roller according to claim 1, characterized in that: The locking element (34) has a retaining opening (46) for the locking pawl (35) and extends longitudinally in the circumferential direction (U) of the roller (2).

3. A roller according to any one of the preceding claims, characterized in that The locking pawl (35) is designed as a double wedge in cross section and has a maximum thickness (d) at opposite end regions in the circumferential direction (U) of the roller (2).

4. A roller according to any one of the preceding claims, characterized in that The locking pawl (35) has a reinforcement element (50) that cooperates with the supporting surface (47).

5. The roller according to claim 4, characterized in that: The reinforcement member (50) is made of a material different from that of the locking claw (35).

6. The roller according to claim 4 or 5, characterized in that: The reinforcement member (50) is designed to be shaft-shaped.

7. The roller according to any one of claims 4 to 6, characterized in that The locking claw (35) is held on the locking element (34) by the reinforcement (50).

8. The roller according to any one of claims 4 to 7, characterized in that Two reinforcement members (50) are provided which are arranged at a distance from each other along the circumferential direction (U) of the roller (2).

9. A roller according to any one of the preceding claims, characterised in that The counter-support surface (58) is designed to extend longitudinally along the circumferential direction (U) of the roller (2).

10. A roller according to any one of the preceding claims, characterised in that The counter-support surface (58) is formed by the upper side of one or more ribs (73).

11. A roller according to any one of the preceding claims, characterised in that The corresponding support surface (58) is formed by one or more upper sides of a plurality of recessed portions (74) formed between a plurality of ribs (73).

12. A roller according to any one of the preceding claims, characterised in that The locking pawl (35) has a retaining protrusion (75) which protrudes transversely to its extension along the circumferential direction (U) of the roller (2).

13. The roller according to claim 12, characterized in that: The retaining protrusion (75) extends longitudinally along the circumferential direction (U) of the roller (2).

14. The roller according to claim 12 or 13, characterized in that: The retaining protrusion (75) is composed of a plurality of individual protrusions.

15. A roller (1), in particular a steering wheel, in particular a roller (1) according to any one of claims 1 to 14, comprising a running wheel (2) with an axis of rotation (y) and a running surface (15), wherein: A locking element (34) having a locking claw (35) is provided, and the locking element (34) is movable between a release position and an engagement position, in which the locking claw acts on a running surface (15) to lock the running wheel (2), wherein the locking element (34) is designed as a first lever member (62) of a toggle mechanism (63) and is rotatably connected to a second lever member (64) of the toggle mechanism (63) in an elbow joint (65), wherein when the toggle mechanism (63) moves from a first position with a larger angle to a second position with a smaller angle, an action element (E) moves the locking claw (35) into the engagement position, characterized in that the second position can only be maintained under the continuous force of the action element (E).

16. The roller according to claim 15, characterized in that The lever elements (62, 64) each have a longitudinal axis (u, m), and in the second position the longitudinal axes (u, m) enclose an angle (β') of less than 180° with one another.

17. The roller according to claim 15 or 16, characterized in that: The active element (E) acts on the toggle lever mechanism (63) in the region of the elbow joint (65).

18. The roller according to any one of claims 15 to 17, characterized in that The active element (E) is designed as an element separate from the toggle mechanism (63).

19. The roller according to any one of claims 15 to 18, characterized in that The active element (E) is movable between a resting position and a spaced-apart position relative to the toggle mechanism (63).

20. The roller according to any one of claims 15 to 19, characterized in that The active element (E) is designed as a linearly movable push rod.

21. The roller according to claim 20, characterized in that The push rod is designed as a switching push rod (12), and the switching push rod can also realize the rotation locking of the roller (1).

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