US20240350884A1 - Bicycle trainer stand and trainer device - Google Patents

Abstract

A bicycle trainer stand comprises supporting means for supporting to a base, a lower support connected to the supporting means, and an upper support (14) connected to the lower support and comprising fastening means for connecting to a bicycle. The upper support is tiltable around an imaginary rotation axis with respect to the lower support. The trainer stand further comprises first spring elements for subjecting the upper support to a force opposing the tilting. In the invention, the lower support is movable with respect to the supporting means in a direction perpendicular to said rotation axis. A bicycle trainer device comprises a first trainer stand for fastening to the front fork of a bicycle, and a second trainer stand for fastening to the rear fork of a bicycle.

Description

FIELD OF THE INVENTION
• The invention relates to a bicycle trainer stand comprising supporting means for supporting to a base, a lower support connected to the supporting means, and an upper support connected to the lower support, the upper support comprising fastening means for connecting to a bicycle, and the upper support being tiltable with respect to the lower support around an imaginary rotation axis, and the lower support being movable with respect to the supporting means in a direction perpendicular to said rotation axis, as well as first spring elements for subjecting the upper support to a force opposing the tilting. The invention also relates to a bicycle trainer device comprising a first trainer stand to be connected to the front fork of a bicycle, and a second trainer stand to be connected to the rear fork of the bicycle.
PRIOR ART
• Racing cyclists and actively training recreational cyclists practise cycling not only outdoors but also indoors. For indoor workouts, many cyclists want to use a bicycle that is the same as, or at least similar to, the bicycle they ride outdoors, instead of a stationary exercise bicycle. For indoor training, the bicycle is fastened to a so-called bike trainer, whereby it remains safely in a vertical position during the exercise. During cycling outdoors along a road, the bicycle moves primarily forward but is also subjected to forces lateral to the direction of travel of the bicycle. These forces result from the cyclist's weight being borne by one of the two pedals after the other, from the tilting of the bicycle in the lateral direction when the position and the mass centre of the cyclist change during cycling, as well as from changes in the position of the handlebars when turning the bicycle. Moreover, cycling is different when riding either uphill or downhill instead of on a flat ground. Most bike trainers are rigidly fastened to the bicycle, whereby they do not enable tilting and/or a lateral movement of the bicycle during cycling. The rigid fastening of the bicycle to the bike trainer places a stress on the structures of the bicycle, particularly in the vicinity of the fastening points, and makes the cycling workout feel unnatural.
• Document WO 2020/018930 A1 describes a bicycle trainer stand comprising a front translation mechanism to be fastened to the front fork of a bicycle, and a rear translation mechanism to be fastened to the rear fork. The translation mechanisms comprise a rail and a carriage movable along the rail. The bicycle fastened to the carriages is movable in the lateral direction along the rails. The movement of the carriages is controlled by a control device as well as by front and rear actuators which may be pneumatic or hydraulic actuators or linear motors.
• Document US 2021/0146192 A1 describes a bicycle trainer stand comprising a bike trainer to be fastened to the rear fork of a bicycle. The document describes various mechanisms by which the bike trainer and the bicycle fastened to it are slightly movable in the longitudinal direction of the bicycle according to the movements of the rider.
• Document U.S. Pat. No. 10,933,291 B2 describes a bicycle trainer comprising a front support assembly, on which the front fork of the bicycle is mounted, and a rear support assembly, on which the rear fork of the bicycle are mounted. The front fork mounted on the front support assembly can be moved in the longitudinal and transverse directions of the bicycle. A transverse motion of the front fork causes the frame of the bicycle to tilt sideways.
• Document U.S. Pat. No. 10,974,118 B2 describes a bicycle trainer comprising a base to be placed against the ground, and a platform mounted above the base. The bicycle is rigidly supported to the platform. The platform can be moved with respect to the base in the longitudinal direction of the bicycle, tilted in a direction transverse to the longitudinal direction, and turned so that the longitudinal direction of the bicycle deviates from the longitudinal direction of the base. Cushion members are provided between the platform and the base, tending to return the platform to a position in alignment with the base.
• In spite of the wide possibilities for the movement of the bicycle frame, a bicycle mounted on the trainers according to U.S. Ser. No. 10/933,291 B2 and U.S. Pat. No. 10,974,118 B2 still does not provide a riding experience comparable with a freely ridable bicycle.
• It is an aim of the invention to present a bicycle trainer stand and a trainer device, whereby problems involved in the prior art can be reduced. The aims of the invention are achieved with a trainer stand and a trainer device which are characterized by what is presented in the independent claims. Some advantageous embodiments of the invention are presented in the dependent claims.
BRIEF SUMMARY OF THE INVENTION
• The invention relates to a bicycle trainer stand comprising supporting means for supporting to a base, a lower support connected to the supporting means, and an upper support connected to the lower support, wherein the upper support comprises fastening means for connecting to a bicycle. The upper support is tiltable with respect to the lower support around an imaginary rotation axis, and the trainer stand comprises first spring elements for subjecting the upper support to a force opposing the tilting. The lower support is movable with respect to the supporting means in a direction transverse to said rotation axis. The trainer stand comprises at least one first guide track, to which first guide track the lower support is fastened to be movable in the longitudinal direction of the guide track, as well as at least one second spring element opposing the movement of the lower support in the direction of the first guide track. The second spring element tends to return the lower support, displaced along the first guide track, to its initial position.
• In a preferred embodiment of the trainer stand according to the invention, said first guide track is fastened at a first fastening point and a second fastening point to the supporting means so that the lower support is arranged between the first fastening point and the second fastening point. Preferably, said second spring element is a helical spring arranged around the first guide track and supported at its first end to the lower support and at its second end to said supporting means.
• In another preferred embodiment of the trainer stand according to the invention, the force exerted by the first spring elements on the upper support and opposing tilting is adjustable. Preferably, the distance from the rotation axis to the first spring elements is adjustable. The effect of changing the distance between the rotation axis and the first spring elements on controlling the tilting of the upper support is similar to that obtained by changing the spring force opposing the tilting.
• In yet another preferred embodiment of the trainer stand according to the invention, the first spring elements are elastic and compressible cushions between the lower support and the upper support.
• In yet another preferred embodiment of the trainer stand according to the invention, said supporting means for supporting to the base comprise rollers, which rollers are arranged at the ends of said first guide tracks.
• In yet another preferred embodiment of the trainer stand according to the invention, said supporting means for supporting to the base comprise a supporting frame with support legs to be placed against the ground, wherein said at least one first guide track is fastened to the supporting frame to be movable in a direction transverse to the longitudinal direction of the guide track. Supported by the support legs, the supporting frame is intended to be mounted on a horizontal base, such as a floor. Alternatively or in addition, said supporting frame may comprise fastening means for mounting to a substantially vertical plane or base.
• In yet another preferred embodiment of the trainer stand according to the invention, said fastening means for fastening to a bicycle comprise a front shaft for fastening to the front fork of the bicycle. That is to say, this embodiment of the invention is intended to be fastened to the front fork of the bicycle, in place of the front wheel removed from the front fork. Preferably, it comprises a front resistance spaced from the front shaft, and a rear resistance, wherein the front resistance and the rear resistance are movable in a direction transverse to the longitudinal direction of the front shaft, and wherein the front fork can be fitted between the front resistance and the rear resistance.
• In yet another preferred embodiment of the trainer stand according to the invention, the front shaft is fastened to the upper support to be rotatable around a vertical axis perpendicular to the front shaft. The rotation of the front shaft around the vertical axis makes it possible to turn the handlebars of the bicycle mounted on the trainer stand.
• Yet another preferred embodiment of the trainer stand according to the invention comprises a bike trainer installed in the upper support, wherein the bike trainer comprises a rear shaft to be fastened to the rear fork of the bicycle. That is to say, this embodiment of the invention is intended to be fastened to the rear fork of the bicycle, in place of the rear wheel removed from the rear fork.
• A bicycle trainer device according to the invention comprises a first trainer stand according to the above description, to be fastened to the front fork of a bicycle, and a second trainer stand to be fastened to the rear fork of the bicycle.
• A preferred embodiment of the trainer device according to the invention further comprises a bicycle frame, a front fork fastened to said first trainer stand, and rear fork fastened to said second trainer stand.
• The invention has the advantage that is increases the possibilities of movement of a bicycle mounted on the trainer stand, particularly in a direction transverse to the longitudinal direction of the bicycle, wherein the cycling workout corresponds better to cycling in nature.
• Furthermore, the invention has the advantage of reducing forces and stresses on the frame of the bicycle mounted on the trainer stand and thereby reducing the risk of damage to the bicycle.
BRIEF DESCRIPTION OF THE DRAWINGS
• In the following, the invention will be described in detail. In the description, reference will be made to the appended drawings, in which
• FIG.1 shows, by way of example, a bicycle trainer device according to the invention, in a diagonal side view,
• FIG.2ashows, by way of example, a supporting frame comprised in the first embodiment of the trainer stand shown inFIG.1, in a diagonal view from above,
• FIG.2bshows, by way of example, an upper support comprised in the first embodiment of the trainer stand shown inFIG.1, in a diagonal view from above,
• FIG.3ashows, by way of example, a second embodiment of the trainer stand shown inFIG.1, in a diagonal view from above, and
• FIG.3bshows, by way of example, the second embodiment of the trainer stand shown inFIG.1, in a diagonal view from below.
DETAILED DESCRIPTION OF THE INVENTION
• FIG.1 shows, by way of example, a bicycle trainer device according to the invention, in a diagonal side view. The device comprises two embodiments of a trainer stand, of which the first one is fastened to thefront fork102 of a bicycle and the second one is fastened to therear fork104 of the bicycle. The bicycle fastened to the trainer stands is preferably a conventional road bike, from which the front and rear wheels have been removed to enable its mounting on the trainer stands. The first embodiment of a trainer stand comprises a supportingframe40 and anupper support14 which is installed to be movable on the supporting frame and to which the front fork of the bicycle is fastened. The second embodiment of a trainer stand comprises a supportingplate6 whose upper surface is provided with a so-calledbike trainer30, to which the rear fork of the bicycle is fastened. The bike trainer comprises a pack of gear wheels around which thechain33 of the bicycle is arranged to go. The bicycle mounted on the trainer stands can be used for cycling workouts, for example, indoors. Pedaling the bicycle will rotate thecircular wheel35 of the bike trainer, whose rotating motion is opposed by a resistance mechanism comprised in the bike trainer, invisible in the figure. The operating principle of the bike trainer is commonly known prior art, so that it will not be described in further detail in this context.
• FIG.2ashows the supportingframe40 comprised in the first embodiment of the trainer stand shown inFIG.1, seen in a slanted view from above, andFIG.2bshows theupper support14 fastened to the supporting frame, seen in a slanted view from the front. In the following, both figures will be described at the same time.
• The supporting frame comprises two substantially parallel second guide tracks42, to which afirst guide track16 is connected in such a way that the second guide tracks are substantially perpendicular to the first guide track. The first guide track and the second guide tracks are substantially identical metal pipes. At both ends, the first guide track is provided with aslidable fixing element44 having a hole through which the respective second guide track extends. Inside the slidable fixing element, a bearing is provided which allows the slidable fixing element, and the first guide track fastened to it, to move along the second guide track. The bearing in the slidable fixing element may be a slide bearing, a ball bearing or, for example, a roller bearing implemented by means of plastic rollers. The first ends of the second guide tracks are connected by cornerjoint pieces48 to the ends of afirst support arm46, and the second ends are connected by corner joint pieces to the ends of asecond support arm47.Support legs28 are hinged to the cornerjoint pieces48. Thanks to the hinged joint, the support legs can be turned to a passive position in a plane parallel to the first and second guide tracks, or to an active position, in which the support legs are substantially perpendicular to the direction of the first and second guide tracks. The support legs can be turned to the passive position, for example, for storage of the trainer stand. The supporting frame constitutes the supporting means for supporting the trainer stand on a horizontal base, such as a floor.
• Twosecond spring elements20 in the form of helical springs are arranged around each of the second guide tracks42 so that one spring element is placed on each side of the slidable fixing element. The second spring element is thus supported at its first end to theslidable fixing element44 and at its second end to the cornerjoint piece48. The spring elements, i.e. helical springs, are dimensioned so that they are slightly compressed in the assembled supporting frame, whereby the spring force of the spring elements tends to keep the slidable fixing elements, provided at the ends of the first guide track, halfway along the length of the second guide tracks.
• The upper support14 (FIG.2b), to which the front fork of the bicycle is fastened, is mounted on thefirst guide track16 by means of a slidingsupport52. The sliding support is provided with a hole, through which thefirst guide track16 extends. Like the slidable fixing elements, the sliding support is provided with an inside bearing which allows the sliding support to move along the first guide track. The bearing in the sliding support may be a slide bearing, a ball bearing or, for example, a roller bearing implemented by means of plastic rollers. Twospring elements20 in the form of a helical spring are arranged around the first guide track so that the sliding support is placed between the second spring elements. The second spring elements are slightly compressed between the respectiveslidable fixing element44 at the end of the first guide track and the slidingsupport52, whereby their spring forces tend to keep the slidingsupport52 halfway the length of the first guide track.
• The upper support fastened to the sliding support comprises a telescopic bar having an adjustable length. The bar comprises two nested tubular parts which can be fastened to each other by a lockingscrew50 so that the bar has a desired length. At its first end, the bar is provided with twoparallel lugs54 and a plate-like stem55 connecting them. The lugs are arranged on the sides of the sliding support and connected to the sliding support by apin56 extending through the lugs and the sliding support. The pin is placed on the imaginary central axis of thebar53. The fastening by means of the pin and the lugs makes it possible for thebar53 to tilt around the pin in either direction. A gap is provided between the substantially flatupper surface51 of the sliding support and thestem55, in which gap twofirst spring elements18 are arranged so that the spring elements are placed on opposite sides of the imaginary central axis of the bar. The first spring elements are elastic cylindrical cushions made of a resilient material, preferably neoprene, rubber or silicone. The compressibility of the first spring elements allows limited tilting of the bar around the pin in either direction. By their spring force, however, the first spring elements tend to return thestem55 and theupper surface51 of the sliding support to a position where they are parallel to each other, whereby the bar is in a position perpendicular to the upper surface of the sliding support. In this embodiment of the trainer stand, the slidingsupport52 constitutes a lower support, to which theupper support14 is fastened to be tiltable around an imaginary rotation axis.
• At the second end of the bar, two end plates are arranged on top of each other: afirst end plate58 and asecond end plate62. The first end plate is rigidly fastened to the second end of thebar53, and the second end plate is fastened to the first end plate by a bolt64 parallel to the bar in such a way that the second end plate can rotate around the bolt. On the rim of the second end plate, two parallelupper lugs60 are provided, through which afront shaft22 extends so that the ends of the front shaft protrude outside the space limited by the upper lugs. The free ends of the front shaft constitute first fastening means for fastening to thefront fork102 of the bicycle. The fastening of thesecond end plate62 to thefirst end plate58, implemented by means of the bolt64, makes it possible to rotate the front fork, fastened to front shaft, around the bolt, that is, to turn the handlebars of the bicycle. Asensor59 for measuring the rotation angle of the front shaft is installed in the first end plate.
• Afront resistance34 is provided on the first side of the upper lugs, and arear resistance36 is provided on the second side. The front and rear resistances are substantially identical bar-like elements arranged parallel to and spaced from thefront shaft22. The front and rear resistances are fastened by their respective adjustment screws61 to a plate connecting the upper lugs so that the front resistance and the rear resistance can be moved in the direction of the adjustment screw by turning the adjustment screw (FIG.2bonly shows the adjustment screw for the front resistance). Thus, a gap having an adjustable width is left between the front and rear resistances, in which gap the front fork of the bicycle can be fitted. By turning the adjustment screws, the front fork can be clamped between the front and rear resistances. The clearance in the direction of the adjustment screws for the front and rear resistances allows a fitted fastening of the front fork also when the tilting angle of the front fork is changed, for example, upon changing the length of thebar53. The front and rear resistances constitute second fastening means for fastening to the front fork of the bicycle.
• FIG.3ashows, by way of example, a second embodiment of the trainer stand shown inFIG.1, in a diagonal view from above, andFIG.3bshows the same in a diagonal view from below. This embodiment of the trainer stand is designed to be fastened to the rear fork of a bicycle, in place of a rear wheel removed from the rear fork. In the following, both figures will be described at the same time.
• The embodiment comprises the supportingplate6 shown inFIG.1, with a bike trainer (FIG.1), known as such, installed on its upper surface. The supporting plate may be made of plastic, a composite material, or a wood material, such as plywood. The supporting plate is fixed with a screw fastening to ametal spacer plate70 whose both ends are provided with anattachment bracket72 turning to a straight angle from the plane of the spacer plate. Alower beam74 formed of a metal profile having a rectangular cross section is provided between the attachment brackets. The first end of the lower beam is fastened to the attachment bracket at the first end of the spacer plate, and the second end of the lower beam is fastened to the attachment bracket at the second end of the spacer plate by ajoint pin76 so that the lower beam can rotate around the joint pin. Each end of the lower beam is provided with a slidingsleeve45 having a hole through which thefirst guide track116 extends. The longitudinal direction of the first guide tracks is perpendicular to the longitudinal direction of the lower beam. Inside the sliding sleeve, a bearing is provided, allowing the movement of the lower beam along the first guide track. The bearing may be a slide bearing, a ball bearing or, for example, a roller bearing implemented by means of plastic rollers. At the free ends of the first guide tracks,rollers32 are provided, which are mounted on bearings to the first guide tracks.
• In this embodiment, the rollers constitute supporting elements for supporting the trainer stand on a horizontal base, such as a floor. The first guide tracks are used as shafts, the rollers being installed at their ends. Thelower beam74 is used as a lower support which is fastened to thespacer plate70 used as the upper support to be turnable around an imaginary rotation axis extending via the joint pins76.
• Twosecond spring elements120 in the form of helical springs are arranged around the first guide tracks so that the slidingsleeve45 is placed between the second spring elements. The second spring elements are slightly compressed between theroller32 at the end of the first guide track and the slidingsleeve45, whereby their spring force tends to keep the slidingsleeve45 and thelower beam74 halfway the length of the first guide track.
• Two plate-like supportingbrackets78 are provided on each side surface of the lower beam. The supporting brackets on the same side of the lower beam are spaced from each other and from the ends of the lower beam in the longitudinal direction of the lower beam. The supporting brackets on opposite sides of the lower beam point away from the side surface of the lower beam and are aligned in the longitudinal direction of the lower beam. The supporting brackets are provided with a shaped plate-like spring support80 having a section above the supporting bracket and a section below the supporting bracket. On top of the section above the spring support, afirst spring element118 is provided, which is slightly compressed between thespacer plate70 and the supportingbracket78. By their spring force, the spring elements tend to keep thespacer plate70 and the supporting plate fastened to it substantially parallel to an imaginary plane extending via the first guide tracks116. The first spring element shown in the figure is a cylindrical cushion made of an elastic material, such as neoprene, rubber or silicone.
• The supporting brackets and thespacer plate70 are provided with anelongate hole84 extending in the longitudinal direction of the supporting bracket (holes of the supporting brackets are not shown in the figures). The first spring elements are fastened to the upper surface of the section on the lower side of thespring support80 by a fastening bolt82 (FIG.3b) extending through thehole84 in thespacer plate70, thefirst spring element118, the section on the lower side of the spring support, the hole in the supportingbracket78, and the section on the lower side of the spring support, below the spring support. The elongate holes in the spring support and the spacer plate allow the spring support and the first spring element fastened to it to be moved in the longitudinal direction of the elongate hole, whereby the distance of the first spring element from thelower beam74 and from the imaginary rotation axis extending via the joint pins76 is changed. The change in the distance affects the ability of the first spring elements to limit the tilting of thespacer plate70 and the supporting plate fastened to it around the rotation axis, and their ability to return the tilted spacer plate to its initial position. When the first spring elements are moved closer to the lower beam, the spring elements limit the tilting of the spring plate to a lesser extent, and when the first spring elements are moved farther away from the lower beam, the spring elements limit the tilting of the spring plate to a greater extent. The user of the trainer stand can adjust the first spring elements to a desired space from the intermediate beam by moving the spring supports80 manually.
• A conventional bicycle used in road traffic, track cycling or mountain biking can be fastened to the bicycle trainer device according to the invention. The trainer device works best when a trainer stand according to the invention is fastened to each of the front fork and the rear fork of the bicycle, in place of the wheels of the bicycle. The trainer stands enable turning of the handlebars, tilting of the bicycle in the lateral direction, as well as a small lateral movement of the bicycle, so that a cycling workout corresponds very well to normal cycling. The device can also be applied in such a way that a trainer stand according to the invention is only fastened to either the front fork or the rear fork. The device can be used for cycling exercises for example in such a way that only the rear fork of the bicycle is fastened to a trainer stand according to the invention. In such a case, the front of the bicycle is supported to the base via the front wheel. Alternatively, only the front fork of the bicycle may be fastened to a trainer stand according to the invention, whereby the rear wheel of the bicycle may be supported to, for example, a pair of rollers resting on the base.
• The trainer stand according to the invention, to be fastened to the front fork of the bicycle, may be equipped with fastening means for fastening it to a vertical plane, such as a wall, or a rail in a vertical position. A particular advantage of the fastening to a rail is that the distance of the trainer stand from the horizontal plane can be easily changed, which enables flexible training in cycling uphill and downhill.
• Some advantageous embodiments of the trainer stand and the trainer device according to the invention have been described above. The invention is not limited to the solutions described above, but the inventive idea may be applied in different ways within the scope of the claims.

• List of reference numerals:

  6	supportingplate
  14	upper support
  16, 116	first guide track
  18, 118	first spring element
  20, 120	second spring element
  22	front shaft
  26	rear shaft
  28	support leg
  30	bike trainer
  32	roller
  33	chain
  34	front resistance
  36	rear resistance
  35	circular wheel
  40	supportingframe
  42	second guide track
  44	slidable fixing element
  45	slidingsleeve
  46	first support arm
  47	second support arm
  48	cornerjoint piece
  50	lockingscrew
  51	upper surface
  52	slidingsupport
  53	bar
  54	lug
  55	stem
  56	pin
  58	first end plate
  59	sensor
  60	upper lug
  61	adjustment screw
  62	second end plate
  64	bolt
  70	spacer plate
  72	attachment bracket
  74	lower beam
  76	joint pin
  78	supportingbracket
  80	spring support
  82	fastening bolt
  84	hole
  102	front fork
  104	rear fork

Claims (15)

1. A bicycle trainer stand comprising:

supporting means for supporting to a base;

a lower support connected to the supporting means; and

an upper support connected to the lower support,

the upper support comprising fastening means for connecting to a bicycle, and the upper support being tiltable around an imaginary rotation axis with respect to the lower support, and

the lower support being movable with respect to the supporting means in a direction perpendicular to said rotation axis, as well as first spring elements for subjecting the upper support to a force opposing the tilting, wherein the bicycle trainer comprises at least one first guide track, to which first guide track the lower support is fastened to be movable in the longitudinal direction of the guide track, as well as at least one second spring element opposing the movement of the lower support in the direction of the first guide track.

2. The bicycle trainer stand according toclaim 1, wherein said first guide track is fastened to the supporting means at a first fastening point and a second fastening point so that the lower support is arranged between the first fastening point and the second fastening point.

3. The bicycle trainer stand according toclaim 1, wherein said second spring element is a helical spring arranged around the first guide track and supported at its first end to the lower support and at its second end to said supporting means.

4. The bicycle trainer stand according toclaim 1, wherein the force exerted by the first spring elements on the upper support and opposing tilting is adjustable.

5. The bicycle trainer stand according toclaim 1, wherein the distance from the first spring elements to the rotation axis is adjustable.

6. The bicycle trainer stand according toclaim 1, wherein the first spring elements are elastic and compressible cushions between the lower support and the upper support.

7. The bicycle trainer stand according toclaim 1, wherein said supporting means for supporting to the base comprise rollers, which rollers are arranged at the ends of said first guide tracks (16).

8. The bicycle trainer stand according toclaim 1, wherein said supporting means for supporting to the base comprise a supporting frame with support legs to be placed against the base, to which supporting frame said at least one first guide track is fastened to be movable in a direction perpendicular to the longitudinal direction of the guide track.

9. The bicycle trainer stand according toclaim 8, wherein said supporting frame comprises fastening means for supporting to a substantially vertical plane or base.

10. The bicycle trainer stand according toclaim 1, wherein said fastening means for fastening to a bicycle comprise a front shaft for fastening to the front fork (102) of the bicycle.

11. The bicycle trainer stand according toclaim 10, wherein the bicycle trainer stand comprises a front resistance spaced from the front shaft, and a rear resistance, wherein the front resistance and the rear resistance are movable in a direction perpendicular to the longitudinal direction of the front shaft, and wherein the front fork can be fitted between the front resistance and the rear resistance.

12. The bicycle trainer stand according toclaim 10, wherein the front shaft is fastened to the upper support to be rotatable around a vertical axis perpendicular to the front shaft.

13. The bicycle trainer stand according toclaim 1, wherein the bicycle trainer stand comprises a bike trainer installed in the upper support, wherein the bike trainer comprises a rear shaft to be fastened to the rear fork of the bicycle.

14. A bicycle trainer device comprising a first trainer stand according toclaim 1 for fastening to the front fork of a bicycle, and a second trainer stand according toclaim 13 for fastening to the rear fork of a bicycle

15. The bicycle trainer device according toclaim 14, wherein the bicycle trainer device further comprises a bicycle frame, a front fork fastened to said first trainer stand, and a rear fork fastened to said second trainer stand.

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