Bicycle rear wheel

Abstract

A bicycle rear wheel comprising a tire rim (1) with spokes (2), a hub body (4), a hub axle (3) on which chain-driven wheels (5, 6) are mounted, and a one-way clutch assembly (71, 72) wherein the clutch assembly comprises coaxially arranged rim (8) with internal teeth (81) and a disc (9) with at least one hook (91) for engaging with the internal teeth wherein the rim has an inner radius (R) defining a circle on which the tips (A) of the internal teeth are located, and wherein the hub body (4) has an outer radius (R) defining a circle on which the tips (A) of the internal teeth are located. The inner radius is greater than the radius (r) of a circle (92) on the disk to which at least one hook (93) is fixed, and wherein one of the rim and the disk is integrated with the chain drive wheel and the spokes are fixed on the other of the disk and the rim.

Description

Technical Field

[0001] The subject of the invention is a spoked bicycle rear wheel. Background Art

[0002] The rear wheel of a bicycle is usually made of a hub, to which a rim with a tire is connected by spokes. The hub consists of a hub axle, on which a rotatable hub body is mounted by ball bearings. The hub body has flanges for fixing the spokes. At one end of the hub axle, a rotatable clutch body is mounted by ball bearings, which has splines for mounting a bicycle cassette consisting of a sprocket. The hub also includes a one-way clutch, most commonly a roller, ratchet or disc clutch.

[0003] A ratchet clutch consists of a rim and a pawl. The rim is usually a metal serrated ring with internal teeth, while the pawl usually has a spring with the help of which the pawl is pressed against the teeth of the ring, achieving engagement. In this case, the rim is attached to the hub body and the pawl is attached to the clutch body. The opposite arrangement is also possible, in which the rim is made of external teeth and attached to the clutch body, while the pawl is located inside the hub body. A single pawl is sufficient to achieve coupling, but the number of engagement points affects the ride, so the goal is to increase the number of engagement points. In this solution, the greater the torque transmitted, the greater the force that presses the clutch elements together.

[0004] Another type of bicycle clutch is the disc clutch, which consists of two interlocking discs. The two discs have a lateral clearance with respect to their shafts and are simultaneously coupled axially to these shafts. The coupling is achieved by pressure of the discs against each other, for example by means of springs. This type of clutch has a greater capacity for transmitting torque. The force pressing the clutch discs together depends on the inclination angle of the teeth and the torsional moment. This pressure can also be achieved by using neodymium magnets.

[0005] From the published text of patent specification US10752320B2, a bicycle rear wheel hub assembly is known, comprising: a hub shaft, which includes a through hole for an axle with a minimum inner diameter equal to or greater than 13 mm; a hub body, which is rotatably mounted on the hub shaft around a central rotation axis; and a gear clutch body, which is rotatably mounted on the hub shaft, the clutch body including at least one external spline tooth for engaging with the rear gear assembly of the bicycle. The tooth includes a spline for receiving the torque generated during pedaling. The splined outer drive surface includes a radial spiral edge that cooperates with a toothed disc. The radial spiral edge allows one toothed disc to move relative to another toothed disc. The solution is characterized by a small number of interlocking points and a rather complex structure.

[0006] From the published text of utility model DE202021106715U1, a bicycle hub is known, which includes: a central shaft as the rotation axis of the bicycle hub; a main body rotatably connected to the central shaft; a free wheel pivotably connected to the central shaft and designed to be connected to a set of sprockets, the free wheel having a plurality of spline teeth. The hub includes a clutch assembly comprising two ratchet discs, each of which has teeth and splines for sliding engagement in the longitudinal direction. One of the ratchet discs is connected to the main body so that it can drive the main body to rotate, and the other ratchet disc is connected to a one-way clutch so that it can drive the one-way clutch. The clutch assembly includes an adjusting element, which is connected to the second ratchet disc and applies a force to displace the second ratchet disc, thereby returning the second ratchet disc to its original position. The adjusting element is a spring, a magnet or is made of an elastic material.

[0007] The published text of application CN114055996A discloses a structure of a one-way gear hub and a bicycle. The mechanism includes a hub assembly and a ratchet assembly. The ratchet assembly is installed by a first meshing mechanism, and the ratchet assembly is coupled to the hub assembly by a second meshing mechanism. The ratchet assembly is a one-way support structure, including a ratchet seat and a ratchet sleeve. The ratchet groove seat is equipped with rolling elements and springs supporting each rolling element. The ratchet sleeve covers the ratchet groove seat and all springs and rolling elements in the ratchet groove seat. The spring presses each rolling element into the ratchet seat and the ratchet sleeve and contacts them. The structure has a large mass. In addition, there is a high radial force in the structure. Therefore, the durability of this solution may be low.

[0008] Patent publication US10723174B2 relates to a bicycle freewheel having two annular bodies. The first annular ferromagnetic body rotates with the bicycle sprocket and includes a first crown-shaped annular gear ring. The second annular body rotates with the bicycle rear wheel and has a second crown-shaped annular gear ring that matches the first crown-shaped annular gear ring and faces the direction thereof. The first annular body can axially move relative to the second annular body between an engaged state in which the first annular gear ring is coupled to the second annular gear ring and a non-engaged state in which the first annular gear ring is separated from the second annular gear ring. At least one magnetic body is arranged radially outward from the first annular body so that the first annular body in the non-engaged state is at least partially contained in the axial space of the magnetic body.

[0009] Technical issues

[0010] The object of the present invention is to propose a structure for a bicycle rear wheel, characterized by a simple structure and quiet operation when the elements forming the one-way clutch are not coupled. The simplicity of design will reduce the number of structural elements, as a result of which the wheel will be lighter, easier to manufacture, more environmentally friendly, and its maintenance will also be easier. Summary of the invention

[0011] The essence of a bicycle rear wheel comprises a tire rim with spokes, a hub axle on which at least one drive sprocket is rotatably mounted, and a one-way clutch assembly, characterized in that the one-way clutch assembly consists of the following components arranged coaxially: a rim with internal teeth and a disc with at least one hook, the at least one hook being used to mesh with the internal teeth and fixed on the circumference of the disc. The rim has an inner radius defining a circle where the tips of the teeth are located, and this radius is greater than the radius of a circle on the disc, and the mounting point of the at least one hook is located on the circle. Respectively, one of the elements of the one-way clutch assembly: the rim or the disc, is integrated with the chain drive wheel, while the spokes are attached to the second element of the one-way clutch assembly: the disc or the rim.

[0012] Preferably, the rim has a thickness of no more than 30 mm and is arranged concentrically with the disc.

[0013] Preferably, the rim and the disc have a thickness no greater than 9 mm and are arranged concentrically relative to each other.

[0014] Preferably, the disc comprises a plurality of hooks.

[0015] Preferably, the hooks are arranged symmetrically with respect to the axis of the hub.

[0016] Preferably, the hook is ring-shaped.

[0017] Advantageously, the hook is rigidly fixed to the circumference of the disc by initial bending, for hooking onto the internal teeth of the rim.

[0018] As an alternative, there are at least two hooks for engaging with an internal toothing of the rim.

[0019] Preferably, one end of the hook has a mounting point on a first side of the disc and the other end of the hook has a mounting point on the other side of the disc, each hook being secured to the same attachment point.

[0020] Alternatively, at least one hook is attached at both ends to a first side of the disc and at least one hook is attached at both ends to the other side of the disc, each hook being attached to the same attachment point and forming a loop facing the inner teeth such that they are mirror images of each other when secured to the first and second sides.

[0021] As an alternative, at least two hooks are attached to the disc by initial bending, wherein the hooks have different lengths and the difference in length of the terminal hooks is smaller than the distance between the tips of the inner teeth.

[0022] Preferably, the disk has recesses for the hooks on its circumference.

[0023] Preferably, the side surface of the tooth on the side opposite to the rotation direction of the rim is concave, and / or the tip of the tooth is offset to the bottom of the groove located on the side of the tooth opposite to the rotation direction of the rim.

[0024] Preferably, the rim with internal teeth is integral with the largest chain drive wheel.

[0025] Preferably, the pitch diameter of the rim is not less than 60 mm and not greater than 55% of the wheel rim diameter.

[0026] As an alternative, the second element of the one-way clutch assembly, ie the disc or the rim, is integrated with a flange of the hub body and the spokes are attached to the flange.

[0027] The essence of a bicycle rear wheel is a tire rim with spokes, a hub axle on which at least one chain drive wheel is rotatably mounted, and a one-way clutch assembly, according to which the one-way clutch assembly is composed of the following components arranged coaxially: a disc with external teeth and a rim with at least one hook, the at least one hook being used to engage with the external teeth and fixed on the inner circumference of the rim. The disc has a radius defining a circle where the tips of the external teeth are located, and the radius is smaller than the inner radius of the circle on the rim, and the mounting point of the at least one hook is located on the circle. Respectively, one of the elements of the one-way clutch assembly: the rim or the disc, is integrated with the chain drive wheel, while the spokes are attached to the second element of the one-way clutch assembly: the disc or the rim.

[0028] Preferably, the disc has a thickness of no more than 30 mm and is arranged concentrically with the rim.

[0029] Preferably, the disc and the rim each have a thickness of no more than 9 mm and are arranged concentrically relative to each other.

[0030] Preferably, the rim comprises a plurality of hooks.

[0031] Preferably, the hooks are arranged symmetrically with respect to the axis of the hub.

[0032] Preferably, the hook is ring-shaped.

[0033] Advantageously, the hook is rigidly fixed to the circumference of the rim by initial bending, for hooking onto the external toothing of the disc.

[0034] Optionally, there are at least 2 hooks for engaging with 1 external tooth of the disc.

[0035] Preferably, one end of the hook has a mounting point on a first side of the rim and the other end of the hook has a mounting point on the other side of the rim, each hook being secured to the same attachment point.

[0036] Alternatively, both ends of at least one hook are attached to a first side of the rim and both ends of at least one hook are attached to the other side of the rim, each hook being attached to the same attachment point and forming a loop with the outer teeth facing so that they are mirror images of each other when attached to the first and second sides.

[0037] As an alternative, at least two hooks are attached to the rim by initial bending, wherein the hooks have different lengths and the difference in length of the terminal hooks is smaller than the distance between the tips of the external teeth.

[0038] Preferably, the rim has a recess for the hook on its inner circumference.

[0039] Preferably, the side surface of the tooth on the side opposite to the rotation direction of the disc is concave, and / or the tip of the tooth is offset to the bottom of the groove located on the side of the tooth opposite to the rotation direction of the disc.

[0040] Preferably, the pitch diameter of the disc is not less than 60 mm and not greater than 55% of the wheel rim diameter.

[0041] As an alternative, the second element of the one-way clutch assembly, ie the disc or the rim, is integrated with a flange of the hub body and the spokes are attached to the flange.

[0042] Advantageous Effects of the Invention

[0043] Thus, the solution provides essentially two variants of a one-way clutch assembly. In one variant, the clutch assembly consists of the following components arranged coaxially: a rim with internal teeth and a disc with at least one hook fixed on the circumference of the disc for meshing with the internal teeth; in the other variant, the clutch assembly consists of the following components arranged coaxially: a disc with external teeth and a rim with at least one hook fixed on the inner circumference of the rim for meshing with the external teeth. Both variants constitute a solution for simplifying the construction of a bicycle hub and rear wheel. The use of a disc and a rim allows the number of structural elements to be reduced, for example, the solution allows the use of a hub body with a simplified construction. The lower number of elements contributes to a lower failure rate. Wheel maintenance is easier. The use of a disc and a rim of the design shown eliminates the knocking that occurs in the disengaged state of the mechanism when using conventional known solutions. Specifically, hooks, especially annular hooks that "jump over" the teeth in the disengaged state, are much quieter than pawls in ratchet or disc clutches. In addition, the solution also contemplates an element containing teeth: the pitch diameter of the disc with external teeth or the rim with internal teeth will be no less than 60 mm and no more than 55% of the wheel rim. The use of a disc or rim of such dimensions allows multiple attachment points to improve the precision of the coupling. Multiple attachment points also increase the reliability and safety of the mechanism - damage to one of the attachment points will not lead to wheel failure. In addition, contrary to known solutions, the operation of the hook is based on tension rather than compression. Another advantage is that, due to the larger dimensions of the clutch element than the known dimensions, the driving forces acting on the teeth and hooks are smaller, which further increases the safety of the structure. The use of multiple hooks (where both ends of at least one hook are fixed on a first side of the rim or disc, and both ends of at least one hook are fixed on the other side of the rim or disc, the hooks being fixed on the same attachment point) makes the engagement on the teeth more stable. On the other hand, a number of hooks of different lengths (where the difference in the length of the end hooks is less than the distance between the tips of the teeth) allows to increase the number of engagement points, while the number of teeth on the circumference of the disc or rim remains unchanged. This ensures an increase in clutch sensitivity, for example using a smaller number of hook attachment points. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The subject matter of the invention is presented in exemplary embodiments in the accompanying drawings, in which:

[0045] Figure 1 The rear wheel of a bicycle is schematically shown;

[0046] Figure 2 Schematically shows a side view of a variant of a one-way clutch assembly having a rim with internal teeth and a disc with a hook;

[0047] Figure 3 Schematically shows a cross section of a wheel variant having an internally toothed rim integrated with a chain drive wheel;

[0048] Figure 4 Schematically shows an enlarged side view of a portion of a one-way clutch assembly variant having a rim with internal teeth and a disc with a hook;

[0049] Figure 5 A cross section of a wheel variant having an internally toothed rim connected to spokes is schematically shown;

[0050] Figure 6 schematically shows an enlarged side view of a portion of a one-way clutch assembly variant having an internally toothed rim to which spokes are attached and a hooked disc;

[0051] Figure 7 Schematically shows a cross section of a wheel variant having an externally toothed disc integrated with a chain drive wheel;

[0052] Figure 8 schematically shows an enlarged side view of a portion of a one-way clutch assembly variant having a disc with external teeth and a hooked rim to which spokes are attached;

[0053] Fig. 9 Schematically shows a cross section of a wheel variant having a disc with external teeth, with spokes attached to the disc;

[0054] Fig.10 schematically shows an enlarged side view of a portion of a one-way clutch assembly variant having a disc with external teeth and a hooked rim, wherein spokes are attached to the disc;

[0055] Fig.11 Schematically shows a cross section of a wheel variant having an externally toothed rim integrated with a flange of a hub body, wherein the spokes are attached to the flange;

[0056] Fig.12 Schematically shows a cross section of a wheel variant having an externally toothed disc integrated with a flange of a hub body, wherein the spokes are attached to said flange;

[0057] Fig.13 A variant of hooking a hook with one tooth is schematically shown;

[0058] Fig.14 A variant with a plurality of hooks for engaging an internal tooth is schematically shown, wherein the hooks are fixed by initial bending and have different lengths;

[0059] Fig.15A variant with two hooks for engaging an external tooth is schematically shown, wherein each hook is attached to one side of the disc or rim. DETAILED DESCRIPTION

[0060] Example 1

[0061] like Figure 1 As shown, the rear wheel of the bicycle is composed of a tire rim 1 with spokes 2 and a hub shaft 3. On the hub shaft 3, the following components are rotatably mounted through ball bearings: a hub body 4 and a flywheel 5 with a chain drive wheel 6. The wheel includes a one-way clutch assembly 71, such as Figure 2-4 As shown, the assembly consists of the following components arranged coaxially: a rim 8 with internal teeth 81 and a disc 9 with a plurality of hooks 91 for engaging the internal teeth 81. The hooks 91 are rigidly fixed on the circumference of the disc 9. The hooks 91 are arranged asymmetrically with respect to the axis 3 of the hub, but in a preferred variant not shown in the figure, a symmetrical distribution is designed to distribute the forces evenly. The rim 8 has an inner radius R of a circle defining the tips A of the internal teeth 81, and this radius is greater than the radius r of a circle 92 on the disc 9, on which the attachment points 93 of the hooks 91 are located. In this exemplary embodiment, the rim 8 is integrated with the largest chain drive wheel 6. It is also possible (not shown in the figure) to integrate the rim 8 with the largest chain drive wheel 6 in such a way that the internal teeth 81 are provided on the inner circumference of the largest chain drive wheel 6. The disc 9 is attached to the hub body 4 and has holes 94 for fixing the spokes 2. The rim 8 and the disc 9 have a thickness of 3 mm and are arranged concentrically relative to each other. The hook 91 is a ring made of a material that yields under pressure. The fixing point 93 of one end of the hook 91 is on the first side 96a of the disc 9, and the fixing point of the other end of the hook 91 is on the other side 96b of the disc 9. The hook 91 (which is a ring) is fixed on the circumference of the disc 9 by initial bending, thereby achieving engagement with the inner teeth 81 of the rim 8. The hook 91 hooked on the teeth 81 achieves the clutch of the disc 9 and the rim 8, and allows torque to be transmitted from the chain drive wheel 6 to the disc 9 and then to the wheel. When the driven wheel rotates faster than the chain drive wheel 6, disengagement occurs and the hook 91 slides out of the inner teeth 81. In order to make the hooking effect of the hook 91 on the inner teeth 81 better and more secure, the side surface 82 of the inner teeth 81 on the side opposite to the rotation direction of the rim 8 is concave, and the tip A of the inner teeth 81 is offset to the bottom of the groove 83 located on the side opposite to the rotation direction of the rim 8 of the inner teeth 81. The disc 9 has on its periphery a recess 95 for the hook 91. In the recess 95 the hook 91 is hidden in the disengaged state. The pitch diameter of the rim 8 is greater than 60 mm and less than 55% of the diameter of the rim 1 of the wheel.

[0062] Example 2

[0063] like Figure 1As shown, the rear wheel of the bicycle is composed of a tire rim 1 with spokes 2 and a hub shaft 3. On the hub shaft 3, the following components are rotatably mounted through ball bearings: a hub body 4 and a flywheel 5 with a chain drive wheel 6. The wheel includes a one-way clutch assembly 72, such as Figure 5 and Figure 6 As shown in FIG. 1 , the one-way clutch assembly is composed of the following components arranged coaxially: a rim 8 having internal teeth 81 and a disc 9 having a plurality of hooks 91 for engaging with the internal teeth 81. The hooks 91 are fixed on the circumference of the disc 9. The hooks 91 are arranged asymmetrically relative to the axis 3 of the hub, as shown in FIG. Figure 2 As shown, but in a preferred variant not shown in the figure, a symmetrical distribution is conceivable. The rim 8 has an inner radius R of a circle defining the tip A of the inner tooth 81, and this radius R is greater than the radius r of a circle 92 on the disc 9, on which the attachment point 93 of the hook 91 is located. In this exemplary embodiment, the disc 9 is integrated with the largest chain drive wheel 6 and has a diameter greater than the diameter of the largest chain drive wheel 6. The rim 8 is attached to the hub body 4 and has holes 84 for fixing the spokes 2. The thickness of the rim 8 and the disc 9 is 3 mm, and the two are arranged concentrically relative to each other. The hook 91 is a ring made of a material that yields under pressure. The fixing point 93 of one end of the hook 91 is on the first side 96a of the disc 9, and the fixing point 93 of the other end of the hook 91 is on the other side 96b of the disc 9. The hook 91 as a ring is fixed on the circumference of the disc 9 by initial bending, so as to achieve the snap-fit ​​on the tooth 81 of the rim 8. The hook 91 hooked on the tooth 81 realizes the clutch of the disc 9 and the rim 8 and allows the torque to be transmitted from the chain drive wheel 6 to the rim 8 and then to the wheel. When the driven wheel rotates faster than the chain drive wheel 6, disengagement occurs and the hook 91 slips out of the tooth 81. In order to make the hooking effect of the hook 91 on the tooth 81 better and more secure, the side surface 82 of the tooth 81 on the side opposite to the rotation direction of the rim 8 is concave, and the tip A of the tooth 81 is offset to the bottom of the groove 83 located on the side opposite to the rotation direction of the rim 8 of the tooth 81. The disc 9 has a recess 96 for the hook 91 on its periphery. In the recess 96, the hook 91 is hidden in the disengaged state. The pitch diameter of the rim 8 is greater than 60 mm and less than 55% of the diameter of the rim 1 of the wheel.

[0064] Example 3

[0065] like Figure 1 As shown, the rear wheel of the bicycle is composed of a tire rim 1 with spokes 2 and a hub shaft 3. On the hub shaft 3, the following components are rotatably mounted through ball bearings: a hub body 4 and a flywheel 5 with a chain drive wheel 6. The wheel includes a one-way clutch assembly 73, such as Figure 7 and Figure 8As shown, the one-way clutch assembly consists of the following components arranged coaxially: a disc 800 with external teeth 801 and a rim 900 with a plurality of hooks 901 for engaging with the external teeth 801. The hooks 901 are rigidly fixed on the inner circumference of the rim 900. The hooks 901 are arranged symmetrically around the axis 3 of the hub, which is not shown in the figure. The disc 800 has an inner radius r' of a circle defining the tip A' of the external teeth 801, and the radius is smaller than the inner radius R' of a circle 902 on the rim 900, and the fixing point 903 of the hook 901 is located on the circle 902. In this exemplary embodiment, the disc 800 is integrated with the largest chain drive wheel 6 in the following manner: the disc is attached to the chain drive wheel as another gear. The rim 900 is attached to the hub body 4 and has holes 904 for fixing the spokes 2. The thickness of the rim 900 and the disc 800 is 3 mm, and the two are arranged concentrically relative to each other. The hook 901 is a ring made of a material that yields under pressure. The fixing point 903 of one end of the hook 901 is on the first side 906a of the rim 900, and the fixing point of the other end of the hook 901 is on the other side 906b of the rim 900. The hook 901 as a ring is fixed to the circumference of the rim 900 by initial bending, thereby achieving engagement on the external teeth 801 of the disc 800. The hook 901 hooked on the external teeth 801 achieves the clutching of the rim 900 and the disc 800, and allows the torque to be transmitted from the chain drive wheel 6 to the rim 900, and then to the wheel. When the driven wheel rotates faster than the chain drive wheel 6, disengagement occurs, and the hook 901 slips out of the external teeth 801. In order to make the hooking effect of the hook 901 on the outer teeth 801 better and more firmly, the side surface 802 of the outer teeth 801 opposite to the rotation direction of the disk 800 is concave, and the tip A' of the outer teeth 801 is offset to the bottom of the groove 803 located on the side of the outer teeth 801 opposite to the rotation direction of the disk 800. The rim 900 has a recess 906 for the hook 901 on its periphery. In the recess 906, the hook 901 is hidden in the disengaged state. The pitch diameter of the disk 800 is greater than 60 mm and less than 55% of the diameter of the rim 1 of the wheel.

[0066] Example 4

[0067] like Figure 1 As shown, the rear wheel of the bicycle is composed of a tire rim 1 with spokes 2 and a hub shaft 3. On the hub shaft 3, the following components are rotatably mounted through ball bearings: a hub body 4 and a flywheel 5 with a chain drive wheel 6. The wheel includes a one-way clutch assembly 74, such as Fig. 9 and Fig.10As shown, the one-way clutch assembly is composed of the following components arranged coaxially: a disc 800 with external teeth 801 and a rim 900 with a plurality of hooks 901 for engaging with the external teeth 801. The hooks 901 are fixed on the inner circumference of the rim 900. The hooks 901 are arranged symmetrically with respect to the axis 3 of the hub. The disc 800 has an inner radius r' of a circle defining the tip A' of the external teeth 801, and the radius is smaller than the inner radius R' of a circle 902 on the rim 900, and the fixing point 903 of the hook 901 is located on the circle 902. In this exemplary embodiment, the rim 900 is integrated with the largest chain drive wheel 6. The disc 800 is attached to the hub body 4 and has holes 804 for fixing the spokes 2. The thickness of the rim 900 and the disc 800 is 3 mm, and the two are arranged concentrically relative to each other. The hook 901 is a ring made of a material that yields under pressure. The fixing point 903 of one end of the hook 901 is on the first side 906a of the rim 900, and the fixing point of the other end of the hook 901 is on the other side 906b of the rim 900. The hook 901 as a ring is fixed to the circumference of the rim 900 by initial bending, thereby achieving engagement with the outer teeth 801 of the disc 800. The hook 901 hooked on the outer teeth 801 achieves the clutch of the rim 900 and the disc 800, and can transmit the driving rotational force from the chain drive wheel 6 to the disc 800, and then to the wheel. When the driven wheel rotates faster than the chain drive wheel 6, disengagement occurs, and the hook 901 slips out of the outer teeth 801. In order to make the hooking effect of the hook 901 on the outer teeth 801 better and more secure, the side surface 802 of the outer teeth 801 opposite to the rotation direction of the disk 800 is concave, and the tip A' of the outer teeth 801 is offset to the bottom of the groove 803 of the outer teeth 801 opposite to the rotation direction of the disk 800. The rim 900 has a recess 905 for the hook 901 on its periphery. In the recess 905, the hook 901 is hidden in the disengaged state. The pitch diameter of the disk 800 is greater than 60 mm and less than 55% of the diameter of the rim 1 of the wheel.

[0068] Example 5

[0069] The wheel is manufactured as described in the above-mentioned embodiment 2, except that the rim 8 of the one-way clutch assembly 72 is integrated with the flange 10 of the hub body 4, as shown in FIG. Fig.11 The spokes 2 are fixed on the flange 10 .

[0070] Example 6

[0071] The wheel is manufactured as described in the above-mentioned embodiment 4, except that the disc 800 of the one-way clutch assembly 74 is integrated with the flange 10 of the hub body 4, as shown in FIG. Fig.12 The spokes 2 are fixed on the flange 10 .

[0072] Example 7

[0073] The wheel is manufactured according to the above-mentioned embodiments 1-6, except that the three ring-shaped hooks 91, 901 can hook an inner tooth 81 or an outer tooth 801 ( Fig.14 ). The fixing point 93, 903 of one end of each hook 91, 901 is on the first side 96a of the disc 9 or on the first side 906a of the rim 900, and the fixing point of the other end of each hook 91, 901 is on the other side 96b of the disc 9 or on the other side 906b of the rim 900. The hooks 91, 901 are attached to the same attachment point 93, 903. The hooks 91, 901 are fixed by initial bending. The ring-shaped hooks 91, 901 have different lengths, and the length difference of the end rings 91, 901 is less than the distance between the tips A or A' of adjacent teeth 81 or 801. The multiplicity of the hooks 91 or 901 makes it possible to increase the hook points.

[0074] Example 8

[0075] The wheel is manufactured according to the above-mentioned embodiments 1-6, except that two annular hooks 91 or 901 hook an inner tooth 81 or an outer tooth 801, such as Fig.15 As shown. Both ends of one hook 91 or 901 are attached to the first side 96a of the disc 9 or the first side 906a of the rim 900, while both ends of the other hook 91 or 901 are attached to the other side 96b or 906b of the disc 9 or the rim 900. The hooks 91 or 901 are attached to the same attachment point 93 or 903. The shape of the hooks 91 or 901 makes their rings face the teeth 81 or 801 so that they are mirror images of each other and cross across the teeth 81 or 801 to form a stable hook.

[0076] Components List:

[0077]

[0078]

[0079]

Claims

1. A bicycle rear wheel, comprising a tire rim with spokes, a hub axle rotatably mounted with at least one chain drive wheel, and a one-way clutch assembly, characterized in that: The one-way clutch assembly (71, 72) consists of the following components arranged coaxially: a rim (8) with internal teeth (81) and a disc (9) with at least one hook (91), the at least one hook (91) being used to engage with the internal teeth (81) and be fixed on the periphery of the disc (9), wherein the rim (8) has an inner radius (R) of a circle defining the tip (A) of the internal teeth (81), the radius being greater than the radius (r) of a circle (92) on the disc (9), the circle (92) having at least one fixing point (93) of the hook (91), and further, respectively, one of the elements of the one-way clutch assembly (71, 72): the rim (8) or the disc (9), is combined with the chain drive wheel (6), while the spokes (2) are attached to the second element of the one-way clutch assembly (71, 72): the disc (9) or the rim (8).

2. The bicycle rear wheel according to claim 1, characterized in that: The rim (8) has a thickness of no more than 30 mm and is arranged concentrically with the disc (9).

3. The bicycle rear wheel according to claim 1 or 2, characterized in that: The rim (8) and the disc (9) have a thickness of no more than 9 mm and are arranged concentrically relative to each other.

4. The bicycle rear wheel according to any one of claims 1 to 3, characterized in that: The disc (9) comprises a plurality of hooks (91).

5. The bicycle rear wheel according to claim 4, characterized in that: The hook (91) is arranged symmetrically with respect to the hub shaft (3).

6. The bicycle rear wheel according to any one of claims 1 to 5, characterized in that: The hook (91) is ring-shaped.

7. The bicycle rear wheel according to any one of claims 1 to 6, characterized in that: The hook (91) is rigidly fixed on the circumference of the disc (9) by initial bending, and is used to hook the inner teeth (81) of the rim (8).

8. The bicycle rear wheel according to any one of claims 1 to 7, characterized in that: There are at least two hooks (91) for engaging with an internal toothing (81) of the rim (8).

9. The bicycle rear wheel according to claim 8, characterized in that: One end of the hook (91) has its fixing point (93) on a first side (96a) of the disc (9), and the other end of the hook (91) has its fixing point on the other side (96b) of the disc (9), the hook (91) being fixed to the same attachment point (93).

10. The bicycle rear wheel according to claim 8, characterized in that: Both ends of at least one hook (91) are attached to a first side (96a) of the disc (9), and both ends of at least one hook (91) are attached to the other side (96b) of the disc (9), the hooks (91) are attached to the same attachment point (93), and the hooks (91) are shaped like an annulus facing the inner teeth (81) so that they are mirror images of each other when attached to the first side (96a) and the second side (96b).

11. The bicycle rear wheel according to claim 8 or 9, characterized in that: At least two hooks (91) are attached to the disc (9) by initial bending, and the hooks (91) have different lengths, and the difference in length of the terminal hooks (91) is smaller than the distance between consecutive tips (A) of the inner teeth (81).

12. The bicycle rear wheel according to any one of claims 1 to 11, characterized in that: The disk (9) has a recess (95) for the hook (91) on its circumference.

13. The bicycle rear wheel according to any one of claims 1 to 12, characterized in that: The inner tooth (81) has a concave side surface (82) on the side opposite to the rotation direction of the rim (8) and / or the tip (A) of the inner tooth (81) is offset toward the bottom of a groove (83) located on the side opposite to the rotation direction of the rim (8), and the inner tooth (81) has a convex side surface (82) on the side same as the rotation direction of the rim (8).

14. The bicycle rear wheel according to any one of claims 1 to 13, characterized in that: The wheel rim (8) with the inner teeth (81) is integral with the largest chain drive wheel (6).

15. The bicycle rear wheel according to any one of claims 1 to 14, characterized in that: The pitch diameter of the rim (8) is not less than 60 mm and not greater than 55% of the diameter of the rim (1) of the wheel.

16. The bicycle rear wheel according to any one of claims 1 to 15, characterized in that: The second element of the one-way clutch assembly (71, 72), the disc (9) or the rim (8), is integrated with the flange (10) of the hub body (4), and the spokes (2) are attached to the flange (10).

17. A bicycle rear wheel, comprising a tire rim with spokes, a hub axle rotatably mounted with at least one chain drive wheel, and a one-way clutch assembly, characterized in that: The one-way clutch assembly (73, 74) is composed of the following components arranged coaxially: A disc (800) with external teeth (801) and a rim (900) with at least one hook (901), the at least one hook (901) being used to engage with the external teeth (801) and being mounted on the inner circumference of the rim (900), the disc (800) having a radius (r') of a circle defining the tip (A') of the external teeth (801), the radius being smaller than the inner radius (R') of a circle (902) on the rim (900), the circle (902 having a fixing point (903) for the at least one hook (901), and respectively, one of the elements of the one-way clutch assembly (73, 74): the rim (900) or the disc (800), being integrated with the chain drive wheel (6), the spoke (2) being attached to the second element of the one-way clutch assembly (73, 74): the disc (800) or the rim (900).

18. The bicycle rear wheel according to claim 17, characterized in that: The disc (800) has a thickness of no more than 30 mm and is arranged concentrically with the rim (900).

19. The bicycle rear wheel according to claim 17 or 18, characterized in that: The thickness of the disc (800) and the rim (900) is no greater than 9 mm, and the two are arranged concentrically relative to each other.

20. The bicycle rear wheel according to any one of claims 17 to 19, characterized in that: The rim (900) includes a plurality of hooks (901).

21. The bicycle rear wheel according to claim 20, characterized in that: The hook (901) is arranged symmetrically with respect to the hub shaft (3).

22. The bicycle rear wheel according to any one of claims 17 to 21, characterized in that: The hook (901) is ring-shaped.

23. The bicycle rear wheel according to any one of claims 17 to 22, characterized in that: The hook (901) is rigidly fixed on the circumference of the rim (900) by initial bending to achieve engagement with the external teeth (801) of the disc (800).

24. The bicycle rear wheel according to any one of claims 17 to 23, characterized in that: There are at least two hooks (901) for engaging with an external tooth (801) of the disc (800).

25. The bicycle rear wheel according to claim 24, characterized in that: One end of the hook (901) has its fixing point (903) on a first side (906a) of the rim (900), and the other end of the hook (901) has its fixing point on the other side (906b) of the rim (900), the hook (901) being fixed to the same attachment point (903).

26. The bicycle rear wheel according to claim 24, characterized in that: Both ends of at least one hook (901) are attached to the first side (906a) of the rim (900), and both ends of at least one hook (901) are attached to the other side (906b) of the rim (900), the hooks (901) are fixed at the same attachment point (903), and the hooks (901) are shaped like an annulus facing the outer teeth (801), so that they are mirror images of each other when attached to the first side (906a) and the second side (906b).

27. The bicycle rear wheel according to claim 24 or 25, characterized in that: At least two hooks (901) are attached to the rim (900) by initial bending, the hooks (901) having different lengths, and the difference in length of the end hooks (901) is smaller than the distance between consecutive tips (A') of the outer teeth (801).

28. The bicycle rear wheel according to any one of claims 17 to 27, characterized in that The rim (900) has a recess (905) for the hook (901) on its inner circumference.

29. The bicycle rear wheel according to any one of claims 17 to 28, characterized in that: The outer tooth (801) has a concave side surface (802) on the side opposite to the rotation direction of the disc (800) and / or the tip (A') of the outer tooth (801) is offset toward the bottom of a groove (803) located on the side opposite to the rotation direction of the disc (800) of the outer tooth (801), and the outer tooth (801) has a convex side surface (802) on the side corresponding to the rotation direction of the disc (800).

30. The bicycle rear wheel according to any one of claims 17 to 29, characterized in that The pitch diameter of the disc (800) is not less than 60 mm and not greater than 55% of the diameter of the rim (1) of the wheel.

31. The bicycle rear wheel according to any one of claims 17 to 30, characterized in that: The second element of the one-way clutch assembly (73, 74), the disc (800) or the rim (900), is integrated with the flange (10) of the hub body (4), and the spokes (2) are attached to the flange (10).

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