WO2005102473A1

WO2005102473A1 - Roller skate comprising a pivotable mechanism for actuating a braking device

Info

Publication number: WO2005102473A1
Application number: PCT/EP2005/004333
Authority: WO
Inventors: Frank Henze
Original assignee: Frank Henze
Priority date: 2004-04-26
Filing date: 2005-04-22
Publication date: 2005-11-03
Also published as: DE102004021354B4; DE102004021354A1

Abstract

Disclosed is a roller skate comprising a shoe (1) with at least one articulated connecting piece (3), a chassis (5), at least two running wheels (10) that are disposed substantially behind one another in the direction of travel while being rotatably mounted on the frame, and at least one braking device. The chassis is connected to the articulated connecting piece so as to be pivotable essentially about a swivel pin (13) which extends approximately in the direction of travel. The inventive roller skate is characterized in that the chassis is pivotable between a first and a second position relative to the shoe. At least one of the braking devices acts upon at least one of the running wheels in the first position while at least one running wheel is rotatable in the second position so as to be substantially unimpeded by at least one braking device which acts upon said running wheel in the first position.

Description

Roller skate with pivoting device for actuating a braking device

Description :

The present invention relates to a roller skate, preferably a single track, in particular an inline skate. The pivoting device described below can also be used to actuate braking devices on inline roller skis, inline skateboards and other inline sports and transportation equipment.

State of the art

Systems for braking single-track roller skates are currently almost exclusively commercially available, in which a rubber block (heel stopper) is fixed to the rear end of the roller skate. If the driver tilts the roller skate backwards, the heel stopper comes into contact with the road and the friction reduces the speed. Known disadvantages are the low braking effect of the heel stopper, the high wear and problems with tracking.

In the following, inventions are mentioned which propose a rotation of individual or all wheels around an axis pointing in the direction of travel in order to initiate braking. US 5 685 550, US 5 899 465 and WO 98/29168 have in common that the wheels are arranged in pairs and are essentially shaped as half-spheres. In US Pat. No. 5,685,550 and US Pat. No. 5,899,465, some or all of the wheel axles, on each of which one of the wheel pairs is rotatably mounted, can be rotated independently of one another about an axis lying between the half spheres and pointing in the direction of travel. The rotation causes the axis to rotate relative to the axis pointing in the direction of travel and a braking mechanism placed in the wheel pairs is actuated. In WO 98/29168 all wheel pairs can be rotated together about an axis lying between the half spheres and pointing in the direction of travel. The rotation brings different pairs of wheels into contact with the road.

In US 4,618,158 two, preferably spherical wheels are each rotatably mounted on the fork-shaped ends of a rail body. The rail body is rotatably connected to the shoe about an axis pointing in the direction of travel. The rotation of the rail body relative to the shoe brings brake wheels attached to the side of the rail body into contact with the road.

In WO 01/64302 AI, a slide movement of the driver is implemented in order to deform the wheels and to bring them into contact with the rail body on which the wheels are rotatably mounted and thus bring about a braking effect.

In addition to rotation about an axis pointing in the direction of travel, it has also been proposed to use a rotation about an axis vertical to the roadway for braking individual wheels. This idea is implemented in US 5 732 957 A and US 5 397 138 A. The object of the invention is to create a roller skate, preferably an inline skate, with a physiological pivoting device for actuating at least one braking device, said pivoting device being integrated in the roller skate and intended for a well-metered actuation of the braking device.

This object is achieved according to the invention by the features of a roller skate with pivoting device for actuating a braking device. With claim 1, the invention expressly focuses on a new device for actuating a braking device. Individual features and characteristics of individual braking devices in connection with the pivoting device from claim 1 are set out in the subclaims.

The invention has the following advantages in particular:

Since many wheels stay in contact with the road when braking, it is comparatively easy for the driver to keep on track.

A large part of the body weight can be converted into braking force and a high deceleration effect can be achieved.

The high braking forces that can be achieved can be used to actuate brakes with little wear and high stability.

The braking force can be easily metered by shifting the center of gravity.

The pivoting device is very space-saving and places hardly any design restrictions on the design of the braking device. In principle, numerous known and proven brake types (e.g. drum brakes, disc brakes, rim brakes) can be adopted from other wheeled vehicles with only minor modifications (modular system).

Numerous braking devices specially developed for roller skates can also be actuated via the pivoting device proposed in the invention.

Components of single-track roller skates, such as those used in the past, such as ball bearings, wheels, axles, spacer sleeves (spacers), only need to be developed slightly, depending on the brake design. For example, in the case of a rim brake, the rim of the wheel may need to be made largely flat and provided with a brake pad.

The present invention can be carried out without further ado such that a heel stopper which has been customary up to now can be mounted on the roller skate as a second (replacement) braking system.

Brief description of the invention

The roller skate according to the invention has several essential assemblies:

One of the assemblies is the shoe 1, which receives the driver's foot 4 and preferably encompasses it firmly. On the shoe, preferably on the bottom of the shoe, one or more extensions, referred to as joint attachment pieces 3, 301, 302, are formed, with which the shoe 1 is pivotally connected to the chassis 5, essentially about an axis 13. This oh se 13 points approximately in the direction of travel F and is referred to below as the pivot axis.

Another assembly is the chassis 5, which is connected to the shoe 1 so as to be pivotable about the pivot axis 13. The shoe 1 forms, together with the pivotably connected chassis 5, a pivoting device. At least two wheels 10 are arranged on the chassis 5 essentially one behind the other and are rotatably mounted. Assembly elements which serve to attach the wheels 10 and which themselves are not coupled to the rotation of the wheels belong to the assembly of the chassis, but not the wheels themselves.

As a further assembly, the roller skate has at least one braking device. Such a braking device is actuated by pivoting the chassis 5 relative to the shoe 1. In order to ensure such actuation, the braking device is preferably connected both to the shoe 1 and to the chassis 5. The assembly of a braking device contains a transmission mechanism that may be required, e.g. Linkage, cables or hydraulic systems.

The chassis 5 is pivotable between two positions with respect to the shoe 1. The positions are referred to as the first position AI and the second position A2.

The second position A2 is preferably defined by the fact that in this position the chassis 5 strikes the shoe 1, preferably the shoe bottom 2 and / or a joint attachment piece 3, 301, 302, and thus prevents the pivoting movement from continuing. At the points where chassis 5 and shoe 1 meet each other, contact surfaces 11, 12 are preferably formed so as to build up the counterforce as large as possible. Likewise, in the second position A2, part of a Hit the braking device against the shoe, thereby preventing the chassis from continuing to pivot relative to the shoe. The second position A2 of the chassis 1 relative to the shoe 5 is also referred to below as the driving position. In the driving position, all the wheels can preferably be rotated by one of the braking devices essentially without interference.

In the first position AI, at least one braking device builds up a counterforce which prevents the chassis 5 from continuing to pivot relative to the shoe 1. The first position AI of the chassis 1 relative to the shoe 5 is also referred to below as the braking position. In it, at least one braking device acts on at least one of the wheels 10.

The roller skate preferably has a reset unit as a further assembly. This essentially has the effect that the chassis 5 is actively guided from the braking position into the driving position when the contact of the roller skate with the road 16 is released. However, the task of the reset unit can also be taken over in whole or in part by at least one of the braking devices.

In a simple and preferred implementation, the chassis 5 has a largely rigid roller carrier, which extends essentially in the direction of travel and to which the wheels 10 are rotatably mounted via axes 19. Such a roller carrier is referred to as the rail body 6,601,602. The rail body can be assembled from several pieces. In principle, significantly more complicated chassis constructions are also possible if, for. B. an effective suspension or control of individual or a group of wheels is to be achieved. The inventive idea is generally not changed by such complex chassis constructions, so that in the further description of the invention fold is assumed from a chassis with a rail body 6, 601, 602.

The basic functioning of the pivoting device on the roller skate according to the invention is first to be illustrated by means of the embodiment variants shown in FIGS. 1 and 2.

Fig. 1 shows the roller skate in the driving position (section at the level of the rearmost wheel, looking in the direction of travel or in the direction of the toe). The roller skate shown is similar to the embodiment variant shown in FIG. 8. The representation in FIG. 1 is schematic and largely restricted to the essentials; a braking device or a reset unit are not shown. For reasons of clarity, the impeller 10 is not shown hatched, despite the section through it. The same applies to all subsequent representations of an impeller. The foot 4 of the driver is preferably largely encompassed by the shoe 1 and thereby fixed to it. The inside of the shoe designates that part of the shoe which borders on the inside of the foot and the inside of the leg. Accordingly, the outside of the shoe designates that part of the shoe which borders on the outside of the foot and the outside of the leg. The inner plane 20 of the shoe is now defined as the plane which lies tangentially on the inside of the shoe and is parallel to the direction of travel and essentially perpendicular to the insole of the shoe. Accordingly, the outer plane 21 of the shoe is defined as that plane which lies tangentially on the outside of the shoe and is parallel to the direction of travel and essentially perpendicular to the insole of the shoe. The shoe inner plane and the shoe outer plane of a shoe run parallel to one another. The shoe 1 is pivotally connected to the chassis 5 at a joint attachment piece 3 via a pivot connection, here designed as a pivot joint 22. This defines the pivot axis 13 of the pivoting movement of the chassis relative to the shoe. If the Driver loaded the roller skate, he presses on the swivel joints 22 with part of his body weight on the chassis 5. This results in a torque. This torque is directed in such a way that the chassis is pressed against shoe 1, here shoe bottom 2. The reason for the torque in the position of the roller skate shown is that the projection of the pivot axis 13 onto the road 16 is offset with respect to the road contact surfaces 17 of the wheels in the direction of the inner leg plane 20.

Fig. 2 shows the same roller skate as in Fig. 1 in the braking position (section at the level of the rearmost wheel, looking in the direction of travel or in the direction of the toe). When the driver loads the roller skate in this position, he presses the chassis 5 again with a part of his body weight at the swivel joints 22. However, the resulting torque is now directed so that the chassis 5 swings away from the shoe bottom 2. A continuation of the swiveling movement is prevented by at least one provided braking device (not shown). The reason for the torque reversal in this position of the roller skate is that the projection of the pivot axis 13 onto the carriageway 16 with respect to the carriageway contact surfaces 17 of the wheels is now offset in the direction of the outer plane of the shoe.

The change from the driving position to the braking position and the associated pivoting movement of the chassis 5 relative to the shoe 1 can be used to actuate a braking device. Thus, by means of a transmission mechanism, the change in position of the chassis 5 with respect to the shoe 1 can be converted into a movement of the braking elements of that braking device and thus a frictional contact can be established between at least one impeller and the braking elements mentioned. If a braking device acts on the impellers, it is typically no longer possible to bring the braking elements closer together. Accordingly, the transmission mechanism builds a counterforce in the braking position , which prevents the chassis from continuing to pivot relative to the shoe. Such a transmission mechanism, which is to be regarded as part of the braking device, can e.g. B. a linkage, a hydraulic piston with hydraulic system or a cable, in particular a Bowden cable.

The precise design of the braking devices is not decisive for the effect of the pivoting device. It is important that the change in the relative position of the chassis 5 relative to the shoe 1 is implemented to actuate a braking device. In the braking position, preferably at least one braking device acts on at least one of the running wheels 10 and prevents the pivoting movement from continuing. There is a hardly manageable number of design options for the braking device. The diverse, already developed solutions for inline skates and other wheeled vehicles can also be used.

The change from the driving position to the braking position is preferably carried out by the driver letting a force component act on the shoe 1 in the direction of the outer plane 21 of the shoe and keeping the wheels 10 of the chassis 5 in contact with the road 16. In contrast to the shoe 1, the impellers 10 cannot yield to the force component directed in the direction of the shoe outer plane 21; and as a result, the pivot axis 13 is displaced over the road contact surfaces 17 of the running wheels in the direction of the outer plane 21 of the shoe. This corresponds to a swiveling movement of the chassis 5 with respect to the shoe 1. A brief increase in the center of gravity of the driver, typically associated with the swiveling movement, is overcome by the aforementioned force acting in the direction 21.

The change from the braking position to the driving position is preferably carried out by the driver lifting the roller skate and the road contact Impellers releases. The force required for pivoting the chassis back into the driving position is preferably applied by the reset unit. The reset unit can also be supported by the braking devices or replaced entirely. Because often with a braking device individual parts of the braking device, for. B. brake arms, connected to its own return spring, so that after braking, the brake elements actively return to their rest position and so the braking device no longer acts on the wheels. The active return of the braking devices to the rest position can thus support the return of the chassis to the driving position.

In addition to the application of the chassis resetting force, the resetting unit can have the task of preventing a too jerky transition from the driving position to the braking position.

Both the driving position shown in FIG. 1 and the braking position shown in FIG. 2 represent a statically stable position for the driver. The position of the pivot axis 13 in relation to the wheels 10 is important. This will be explained in more detail with the help of FIG. 3. The plane which is orthogonal to the axis of rotation of the impeller and essentially runs through the points of the impeller with the maximum distance from the axis of rotation is defined as the impeller plane 23 of an impeller 10. In Fig. 3, the pivot axis 13 is offset with respect to the impeller level 23 to the inner shoe level 20. By displacing the swivel axis, the torque acts in the driving position such that the rail body 6 is pressed against the shoe bottom 2 with the contact surface 11 and the driver can thus only hold the roller skate in the driving position by loading his body weight. The driving position is therefore statically stable and the roller skate according to the invention can thus be driven essentially like a conventional inline skate. The roller skate in FIG. 4 differs from that in FIG. 3 essentially in that the contact surface 11 of the chassis is designed obliquely. As a result, the impeller level of the impellers is tilted somewhat to the inner level of the shoe in the driving position. 4, the pivot axis 13 is again offset with respect to the wheel plane 23 to the shoe inner plane 20 and the driving position is statically stable.

Alternatively, the pivoting device can be specified by taking into account the position of the shoe 1 relative to the road 16, both in the braking position and in the driving position. It is difficult to define the position of the shoe 1 in relation to the road 16 very precisely, since the foot 4 and thus the shoe, as the structure which preferably encompasses the foot, has a complicated shape. In view of this, the contact surface 24 for the forefoot, ie the surface of the insole 26 of the shoe 1, on which the toes and pads of the foot 4 are placed, is identified as largely flat. A possible footbed should not be taken into account.

5 shows the contact surface 25 of the foot on the insole 26 of the shoe (view from above, left foot). The contact surface 24 of the forefoot is highlighted with hatching.

When rolling on the road 16, shoe positions are comfortable and physiological for the driver, in which the insole 26 of the shoe, more precisely the support surface 24 for the forefoot in the shoe, is essentially parallel to the road 16. Accordingly, such a shoe position should represent both the driving position and the braking position as a statically stable position. The driver should therefore be able to load the shoe with his body weight perpendicular to the road surface without the chassis 5 starting to pivot relative to the shoe 1 into a different position. If you consider the plumb plane 28, which is perpendicular to the track 16 and passes through the pivot axis 13 of the pivoting movement of the chassis shoe, this is achieved in that, in the braking position, the roadway contact surfaces 17 interacting with the roadway are offset with respect to the perpendicular plane 28 to the inner plane 20 of the shoe, and the roadway contact surfaces 17 in the driving position impellers interacting with the road are offset with respect to the solder plane 28 to the outer shoe plane 21. The roadway contact surface 17 of an impeller is the surface of the impeller that is currently in contact with the roadway 16.

The feature just described is illustrated graphically by means of FIGS. 6 and 7 (section at the level of the foremost impeller, view against the direction of travel or towards the rear of the shoe). In order to make the alignment of the support surface 24 visible to the forefoot in the shoe 1, the roller skate is shown cut open at the front and the foot 4 in the shoe 1 is indicated.

Fig. 6 shows the roller skate in the driving position with the support surface 24 parallel to the road 16 for the forefoot in the shoe. The roadway contact surface 17 of the wheel 10 is offset with respect to the plane 28 standing perpendicular to the roadway by the pivot axis 13 to the outer plane 21 of the shoe.

Fig. 7 shows the roller skate in the driving position with the support surface 24 parallel to the road 16 for the forefoot in the shoe. The roadway contact surface 17 of the wheel 10 is now offset with respect to the plane 28 standing perpendicular to the roadway by the pivot axis 13 of the shoe inner plane 20.

In conventional inline skates, impeller arrangements have also been proposed in which the axes 19 of the impellers are not aligned exactly parallel to one another. Likewise, the pivot axis 13 are not exactly orthogonal to the axis 19 of an impeller. This is taken into account in the wording of claims 3 and 4.

If the swivel connection between the chassis 5 and the shoe 1 is not a pure swivel joint, the swivel axis 13 of the chassis 5 is not necessarily stationary relative to the shoe 1 with respect to the chassis and / or the shoe. In this case, the pivot axis 13 denotes the instantaneous axis of the pivoting movement of the chassis relative to the shoe, that is to say the pivot axis given the relative position of the chassis and the shoe at the moment.

Basically, claims 3 and 4 specify relative arrangements of pivot axis 13, chassis 5, shoe 1 and wheels 10, with which the preferred mode of operation of the roller skate according to the invention described in connection with FIGS. 1 and 2 can be realized. However, other arrangements can also be found which do not fall under the scope of protection of claims 3 and 4 but nevertheless produce the desired mode of operation. This is e.g. B. possible by deliberately distorting the forces or torques acting on the chassis and the shoe. Such a distortion can be realized quite easily by strong springs acting between the individual assemblies. To distort the forces z. B. also serve a device similar to the reset unit 18 in Fig. 18, whereby too easy pivoting of the chassis 5 is prevented from the driving position into the braking position.

Detailed description of the invention

Fig. 8 shows a first detailed embodiment of the invention with the features of claim 1 (left roller skate, exploded view). Two joint attachment pieces 301 are attached to the shoe bottom 2 of the shoe 1. The Chassis has a rail body 601, 4 wheels being provided between the two mutually parallel side pieces 29, 30 of the rail body. Through each of the wheels 10, an axis 19 is guided, which is fixed to the two side pieces 29,30. The wheels 10 are preferably ball-bearing. The fixation of the axes 19 on the rail body and the ball bearings can be carried out as in the case of inline skates according to the prior art. In this embodiment variant, the connection between the rail body 601 and the joint attachment pieces 301 takes place in each case via a swivel joint. Each of the swivel joints is constructed as follows: at the point of the joint, the rail body 601 has two intermediate webs 32 which are parallel to one another and which connect the side pieces 29, 30 of the rail body. A joint attachment piece 301 engages through the recess 46 on the upper side 31 and the side piece 29 of the rail body with the attachment extension 36 between the two intermediate webs 32. Each of the two intermediate webs is equipped with a bore. The extension of the joint attachment piece is also equipped with a bore 42. A screw 43 is inserted through the total of three bores and the end is screwed to a preferably self-locking nut 44. In this embodiment variant, the intermediate webs 32 are partially connected to one another in order to increase the stability.

As a further variant, the bore 42 in the joint attachment piece or the two bores in the intermediate webs 32 can be designed as an elongated hole. This allows a combination of the swivel movement with a translation movement.

A braking device and a reset unit are not shown in FIG. 8. As a braking device z. B. a variant with the features from FIGS. 21 to 28 can be used. A reset unit takes priority instruct at location C on the rail body and location D on the shoe bottom.

FIG. 9 shows the embodiment variant corresponding to FIG. 8 from below. For clarification, the joint attachment pieces 301 are highlighted with hatching.

10 shows one of the two joint attachment pieces 301 in detail. The joint attachment piece is fastened to the base plate 34 on the shoe bottom 2, preferably riveted or screwed. Alternatively, the base plate 34 can also be integrated directly into the shoe bottom 2 or can be designed with the shoe as a material-identical unit. An extension consisting of four cross-shaped extensions 36, 37, 38, 39 is placed on the base plate, each of the extensions being essentially orthogonal to the base plate. The two longitudinal stabilization extensions 38, 39 are arranged orthogonally to the attachment extension 36. For assembly, the joint attachment piece 301 is inserted into the recess 46 provided in the rail body on the upper side 31 and in the side piece 29 of the rail body 601 located to the inner plane of the shoe.

FIG. 11 shows a side view of the joint attachment piece 301 from FIG. 10 (view in the direction of travel).

FIG. 12 shows a section through the shoe base 2 together with the joint attachment piece 301 and on the rail body 601 pivotably attached to it (view in the direction of travel).

As can be seen in FIGS. 9 and 12, in this first detailed embodiment of the invention, the joint extension pieces 301 protrude clearly into the space between the respective impellers 10. The space in the spatial direction is parallel to the impeller axes 19 the tangential planes are limited to the two flanks of the respective impellers 10.

Fig. 13 shows a further detailed embodiment of the invention with the features of claim 1 (left roller skate, exploded view). This embodiment variant differs from the variant in FIG. 8 above all in the design of the swivel joints connecting the joint attachment pieces and the rail body.

In the embodiment variant of FIG. 13, two joint attachment pieces 302 are attached to the shoe bottom 2 of the shoe 1. The chassis has a rail body 602, four running wheels being provided between the two mutually parallel side pieces 29, 30 of the rail body. Through each of the wheels 10, an axis 19 is guided, which is fixed to the side pieces 29,30. The wheels 10 are preferably ball-bearing. The fixation of the axes 19 on the rail body and the ball bearings can be carried out as in the case of inline skates according to the prior art. In this embodiment variant, the connection between the rail body 602 and the joint attachment pieces 302 again takes place via a swivel joint. Each of the swivel joints is constructed as follows: At the location of the joint, two short formations 48, 49, each with a bore 50, 51, are provided on the side piece 29 of the rail body 602 located toward the shoe inner plane. The joint attachment piece 302, which is also equipped with a bore 52, engages with its main part 54 between the two short formations 48, 49 and is pivotally connected to these by means of a bolt 58 guided through the bores 50, 51, 52. In order to guide the pivot axis 13 as close as possible to the side piece 29 of the rail body 602, in the embodiment variant of FIG. 13 the side piece 29, which is located on the inner plane of the shoe, is provided at the location of the swivel joint with a recess 59 into which the main part 54 of the joint attachment piece 302 engages , As a variant, the bore 52 in the joint attachment piece 302 or the two bores 50, 51 in the formations 48, 49 can be designed as an elongated hole. This allows a combination of the swivel movement with a translation movement.

A braking device and a reset unit are not shown in FIG. 13. As a braking device z. B. a variant with the features from FIGS. 21 to 28 can be used. A reset unit preferably engages at point C on the rail body and point D on the shoe bottom.

FIG. 14 shows the embodiment variant corresponding to FIG. 13 from below. For clarification, the joint attachment piece 302 is highlighted with hatching.

15 shows one of the two joint attachment pieces 302 in detail. The joint attachment piece is fastened to the base plate 53 on the shoe bottom 2, preferably riveted or screwed. Alternatively, the base plate can also be integrated directly into the shoe bottom or can be designed with the shoe as a material-identical unit. An extension consisting of a main part 54 and two stabilization extensions 55, 56 is placed on the base plate 53, the main part and the stabilization extensions being essentially orthogonal to the base plate. For the assembly, the joint attachment piece 302 is inserted with the main part 54 into the depression provided in the rail body 602 on the side piece 29 of the rail body 602 located to the inner plane of the shoe.

FIG. 16 shows a side view of the joint attachment piece 302 from FIG. 13 (view in the direction of travel). 17 shows a section through the rail body 602 and an articulated attachment piece 302 which is pivotably attached to the latter (view of the direction of travel).

Both in the embodiment variant of FIG. 8 and in that of FIG. 13, pressure surfaces 11 are formed on the rail body 601 or 602, with which the rail body is pressed against the shoe 1 in the driving position. There, complementary pressing surfaces 12 are formed in the form of the base plate of the joint attachment pieces 301 and 302 attached to the shoe bottom. In general, the pressing surfaces 11 of the rail body and the pressing surfaces 12 of the shoe can be profiled. They then preferably have an approximately complementary profile at those points where they come into contact with one another, so that a largely torsion-free toothing is produced which does not impair the pivoting movement of the chassis.

In all design variants of the roller skate, there is the option of alternatively using a flexible bending element, which attaches both to the joint attachment piece and to the rail body, between a joint attachment piece 3, 301, 302 and the rail body 6, 601, 602. This flexible bending element can, for. B. be a piece of rubber or flexible plastic. The connection of the flexible bending element with the rail body and / or the joint attachment piece can in each case, for. B. glued or riveted. Alternatively, the flexible bending element can be permanently integrated in the rail body and / or in a joint attachment piece, e.g. B. with multi-component technology as a component, or simply be realized by a notch in the material, through which the increased flexibility is guaranteed.

In general, it can be advantageous to slightly pivot the pivot axis 13 of the pivoting movement of the chassis 5 relative to the shoe 1 relative to the driving direction F inclined, so not exactly parallel to this. For example, in the case of a shoe with two joint attachment pieces, the joint attachment piece which is at the rear in relation to the direction of travel can be made somewhat shorter in comparison with the front and thus the rear pivot connection can be offset somewhat upwards in relation to the front. In the driving position, the pivot axis 13 rises to the rear, the shoe bottom 2 remaining approximately parallel to the road 16 when driving. A transition to the braking position now causes the shoe bottom to drop obliquely backwards in this position, i.e. the heel is lowered lower than the toe area, and the driver has the feeling that he is bracing himself against the direction of travel. Likewise, the swivel connection between the rail body and the joint attachment piece that is at the front with respect to the direction of travel can be offset somewhat to the shoe inner plane 20 or shoe outer plane 21 compared to the swivel joint between the rail body and the rear joint attachment piece. This results in a small angle between the pivot axis 13 and the direction of travel F, the pivot axis nevertheless being in a plane that is largely parallel to the roadway 16 when driving. As a result, the triggering behavior of the pivoting movement of the chassis relative to the shoe is changed during the transition from the driving position to the braking position.

A joint attachment piece can form an immediate extension or an immediate shape of the shoe or can be attached to the shoe as a separate piece. The attachment can be permanent, e.g. B. via screws or rivets, or reversible. Shock-absorbent attachment is also possible. Basically, several joint attachment pieces can, for. B. connected by a common base plate or intermediate webs form a common unit. They then represent a common joint attachment piece. Reversible attachment to the shoe is advisable if the shoe is also intended to serve as a street shoe. In this case, the shoe should be easy to remove and re-attach. In order for the chassis 5 to return from the braking position to the driving position when the roller skate is raised and the contact of the wheels 10 with the roadway 16 is released, a restoring force, referred to as the chassis restoring force, is required.

A simple variant of a reset unit consists of a tension spring, one end of which is fixed at a point on the chassis 5 and the other end of which is fixed at a point on the shoe 1. The locations on the chassis and shoe are to be selected eccentrically with respect to the pivot axis 13. In the embodiment variant of FIGS. 8 and 13, such a location on the chassis is location C and location D on the shoe. By pivoting the chassis into the braking position, the tension spring connecting the shoe and the chassis is tensioned and the chassis restoring force is built up ,

18 shows an embodiment variant of a reset unit 18 with torsion spring 60 (view of the left roller skate from the inside of the shoe). The shoe bottom 2 is largely hidden. The chassis is similar to that in FIG. 8 or FIG. 13. Only part of the side piece 30 located to the outer plane of the shoe is shown of the rail body 6 of the chassis. The bolt 61 is oriented essentially in the direction of travel and is fastened to the shoe bottom 2 by the two shapes 62, 63 thereof. The swivel arm 64 is attached to the bolt 61 with one end rotatable about the bolt axis. At the other end of the swivel arm 64 there is an essentially tensile intermediate element, here a rope 65. The cable 65 leads to a point on the chassis 5 which is eccentric with respect to the pivot axis 13 of the connection between the chassis and the shoe, in this case the side piece 30 of the rail body located to the outer plane of the shoe. The torsion spring 60 is eccentrically attached to the swivel arm 64 with respect to the pin axis with the shaped arch 66. The turn of the torsion spring is fixed by the bolt 61. The torsion spring 60 attaches to the shoe bottom 2 with the free ends 67 and 68. If the chassis 5 is now pivoted over the shoe 1 for braking, pulls the rope 65 attached to the chassis on the pivot arm 64. This rotates it about its axis, the torsion spring 60 is tensioned and thus a chassis rear part is built up force.

FIG. 19 shows a section through the reset unit from FIG. 18 (central section, view in the direction of travel).

FIG. 20 shows a variant of the swivel arm 64 corresponding to FIGS. 18 and 19, the modification leading the swivel arm to the point at which the cable 65 runs through the swivel arm 64 having an approximately rope-wide incision 69. As a result, when the rope is relaxed, it can be removed from the swivel arm for maintenance purposes.

In principle, the roller skate can also be equipped with a combination of several, also different, reset units. As a result, in particular the chassis restoring force can be better adapted as a function of the pivoting angle of the chassis 5 relative to the shoe 1 and a transition from the driving position into the braking position that is as physiological as possible can be ensured. In particular, not all reset units have to apply a chassis reset force in every position of the chassis relative to the shoe.

21 and 22 illustrate the principle of operation of a first type of braking device. Fig. 21 shows the left roller skate in the driving position, Fig. 22 shows the same roller skate in the braking position (each section at the level of the rearmost wheel, looking in the direction of travel). The shoe and chassis essentially correspond to the embodiment variant in FIG. 8. However, such a braking device is in principle for roller skates with the features of claim 1 suitable. In principle, the braking device can act on any impeller.

In the embodiment variant of the braking device shown in FIGS. 21 and 22, the side piece 30 located to the outer plane of the shoe, together with the top 31 of the rail body 6, is provided with a recess 72 at the level of the axis 19 of the running wheel 10. Correspondingly, a brake body 74 is fastened on the shoe bottom 2, here on an extension 73 thereof. If the driver now swivels the chassis 5 relative to the shoe 1 from the driving position into the braking position, the impeller 10 comes into contact with the braking body 74 and is braked. In order to be able to replace the brake body in the event of wear, the brake body is preferably attached using one or more screws. If necessary, the brake body 74 can also be integrated in the shoe bottom 2 or in the extension 73.

The braking device shown in FIGS. 21 and 22 is characterized in that no part of it is attached to the chassis 5. In fact, the brake body 74 is only fixed to the shoe 1 via the extension 73. Braking devices attached to shoe 1 alone are simple in design and initially obvious, but in combination with the intended actuation by the pivoting movement of chassis 5 relative to shoe 1 are only suitable to a limited extent. The reason for this is e.g. B. the large space requirement of such an arrangement and the largely predetermined by the arrangement contact region with the braked impeller. In contrast, brake devices in which individual parts of the brake device such as brake arms or hydraulic systems are attached to the chassis can be better optimized with regard to space utilization, integration of an adjustment unit for wear correction, response behavior and choice of the contact region with the wheel to be braked. 23 and 24 illustrate the principle of operation of a further type of braking device. Fig. 23 shows the left roller skate in the driving position, Fig. 24 shows the same roller skate in the braking position (each section at the level of the rearmost wheel, looking in the direction of travel). Shoe 1 and chassis 5 essentially correspond to the embodiment variant in FIG. 8. However, such a braking device is in principle suitable for roller skates with the features according to claim 1. The braking device can act on any impeller 10.

In the embodiment variant shown in FIGS. 23 and 24, the side piece 30 located to the outer plane of the shoe is provided with a recess 75, 76 together with the upper side 31 of the rail body 6 at the level of the axis of the running wheel. A brake arm 8 is mounted below the recess 75 in the side piece 30 of the rail body or also at the lower end of this recess 75, essentially pivotable about an axis parallel to the direction of travel. The brake arm 8 is guided through the two recesses 75, 76 and extends with its end 77 to below the shoe base 2. When changing from the driving position to the braking position, the brake arm 8 is caused by the pivoting movement about the pivot axis 13 through the shoe base against the impeller 10 pressed and thereby braked. Preferably, a return spring acting on the brake arm and rail body ensures that the contact between the brake arm and the running wheel is released when changing from the braking position to the driving position. Alternatively, such a return spring can attack the brake arm and shoe. A return spring is not shown in FIGS. 23 and 24.

25 and 26 as well as FIGS. 27 and 28 illustrate the principle of operation of a braking device with the features of claim 9. 25 and 26 show a first embodiment variant of a braking device with the features of claim 9. The left roller skate is shown in the driving position in FIG. 25, FIG. 26 shows the same roller skate in the braking position (each section through the left roller skate between two wheels, looking in the direction of travel). Shoe 1 and chassis 5 essentially correspond to the embodiment variant in FIG. 8. However, the braking device shown is in principle suitable for roller skates with the features according to claim 1. The embodiment variant in FIGS. 25 and 26 has as hydraulic system a hydraulic piston 215 and a hydraulic line system, which is guided from the hydraulic piston to at least one hydraulically actuable brake for at least one impeller 10 and hydraulically couples said hydraulically actuated brakes to the hydraulic piston. For reasons of clarity, only the hydraulic piston 215 and not the hydraulic line system or the brakes are shown in FIGS. 25 and 26. The hydraulic piston essentially consists of two components which can be moved relative to one another, the plunger 216 and the plunger 217, in which the plunger is guided. The stamp handle 218 is pivotally attached to the shoe 1, here on an extension 220 of the shoe bottom 2 that is offset from the outer plane of the shoe. The piston 217 is pivotably attached to the rail body 6, here on a short, upwardly projecting extension 221 of the side piece 29 of the rail body located to the inner plane of the shoe. For reasons of space, the hydraulic piston 215 is preferably arranged above the space between two impellers 10. So that one of the joint attachment pieces 3 or a pressure surface 11 of the rail body does not block this area, the hydraulic piston 215 is suitable in an embodiment variant of the roller skate with four running wheels 10 and two joint attachment pieces 3 (arrangement similar to FIG. 8 or FIG. 13) to be arranged in the space or above the space between the second and third impeller. To improve the stabilization, both side pieces 29, 30 of the rail body can be connected to an intermediate web 32 below the hydraulic piston. that will. During the transition from the driving position (FIG. 25) to the braking position (FIG. 26), the plunger 216 of the hydraulic piston 215 is pressed in the direction of the piston head 219 by the relative change in position of the chassis 5 relative to the shoe 1. The pressure built up between the plunger 216 and the piston crown 219 is transmitted to the hydraulically actuable brakes via a hydraulic line system, and thereby at least one brake element of the respective brake is pressed against the respective wheel to be braked. If necessary, the orientation of the hydraulic piston 215 can also be reversed. Then the stamp 216 acts on the shoe and the piston 217 on the chassis.

In the embodiment variant of FIG. 25 or FIG. 26, both the piston and the plunger stem are fastened to the chassis or to the shoe via a swivel joint. However, the relative change in position of the chassis 5 and the shoe 1 associated with a pivoting movement of the chassis 5 relative to the shoe 1 can generally be implemented in a variety of ways for actuating a hydraulic piston. For example, the hydraulic piston can be adjusted by means of a mechanism specially adapted for the implementation of the swivel movement of the chassis shoe, eg. B. be operated by tilting, swinging and / or screwing. With such a construction there is also the possibility of firmly attaching the piston of the hydraulic piston to the chassis 5 or to the shoe 1. Such an arrangement is described in detail below.

Basically, a variety of hydraulically actuable brake types can be considered for the connection to the hydraulic system of the brake device. For example, hydraulically operated brakes specially developed for inline skates can be used. Modifications of known brake types, e.g. B. hydraulically actuated rim or disc brakes for bicycles and hydraulically actuated drum brakes. The hydraulic line system can run wholly or partially in the rail body or can be integrated into it. The function of the hydraulic piston is essentially independent of its likkolbens is essentially independent of its cross-sectional profile. The piston and the stamp base can accordingly z. B. run round, oval or angular.

27 and FIG. 28 show a further embodiment variant of a braking device with the features of claim 9 (section through the left roller skate between two wheels, looking in the direction of travel). Shoe 1 and chassis 5 essentially correspond to the embodiment variant in FIG. 8. However, the braking device shown is in principle suitable for roller skates with the features according to claim 1. The embodiment variant in FIG. 27 has as hydraulic system a hydraulic piston 235 and a hydraulic line system which is guided from the hydraulic piston to at least one hydraulically actuable brake for at least one impeller 10 and hydraulically couples said hydraulically actuated brakes to the hydraulic piston. For reasons of clarity, only the hydraulic piston and only a part of the hydraulic line system 240 are shown in FIG. 27 again. The hydraulic piston 235 again essentially consists of two components which can be displaced relative to one another, the plunger 236 and the plunger 237, in which the plunger is guided. The hydraulic fluid is provided in the hydraulic piston between the piston crown and the piston crown. The hydraulic fluid can flow in and out of the hydraulic piston 235 through a bore. The hydraulic line system 240 connects to this bore. It leads to at least one hydraulically actuable brake for at least one impeller 10. Such a brake is not shown in FIG. 27. In the embodiment variant shown in FIG. 27, the piston 237 is firmly attached to the shoe 1, preferably to the shoe bottom 2 or to an extension 242 thereof. This assembly of the hydraulic piston offers the advantage over the arrangement in FIG. 25 or FIG. 26 that a rotary joint for the piston 237 can be dispensed with. Outside the piston, two rods 243, 244 act on the stamp stem. This is preferably done by the end of the A stylus 246 is guided essentially parallel to the direction of travel and a rod 243 or 244 is pivotally attached to each of the two pen ends. The rods 243, 244 are guided substantially parallel and symmetrically along both sides of the hydraulic piston 235 and are preferably connected to the rail body via an extension 262 pointing upwards. Alternatively, instead of the two rods 243, 244, two tensile flexible connecting elements or the two end pieces of one and the same tensile flexible connecting element can be used. As a tensile, flexible connecting element, z. B. a rope or a tape.

In general, the roller skate can also be equipped with a plurality of hydraulic pistons, and a plurality of brakes, which are also arranged on different running wheels, can be controlled via one and the same hydraulic piston.

As an alternative to a hydraulic piston, other cavities filled with a hydraulic fluid, e.g. B. an elastic balloon. The volume of the cavity is variable due to the pivoting movement of the chassis shoe. Due to a change in volume, the hydraulic fluid flows in and out of the variable cavity mentioned and communicates via a hydraulic line system with at least one of the provided hydraulically actuable brakes for at least one impeller. Numerous variants are possible for the design of the variable cavity mentioned and the implementation of a mechanism for bringing about the change in volume of the cavity.

The roller skate can be provided with one or more, also different, braking devices. Both the left or the right or both roller skates can be equipped with the described features of the invention.

Claims

P a t e n t a n s r u c h e

A roller skate comprising a shoe (1) with at least one joint attachment piece (3, 301, 302), a chassis (5), at least two wheels (10) which are arranged one behind the other in the direction of travel and are rotatably attached to the chassis and at least one braking device .

wherein the chassis is pivotally connected to the joint attachment piece essentially about a pivot axis (13) which extends approximately in the direction of travel, characterized in that the chassis is pivotable relative to the shoe between a first and a second position, in the first Position (AI) acts on at least one of the braking devices on at least one of the wheels and in the second position (A2) at least one wheel is essentially unaffected by at least one braking device which acts on this wheel in the first position (AI). Roller skate according to claim 1, characterized in that at least one of the braking devices prevents the pivoting movement of the chassis (5) relative to the shoe (1) from continuing beyond the first position (AI).

Roller skate according to one of the preceding claims, characterized in that at least one point on the pivot axis (13) at which a joint attachment piece (3, 301, 302) is pivotally connected to the chassis (5) about the pivot axis (13) on the impeller level (23) of at least one impeller (10) is offset to the shoe inner level (20).

Roller skate according to one of the preceding claims, characterized in that when the roller skate interacts with a flat roadway (16), with a) the shoe (1) being in a normal position, b) the chassis (5) in the first position (AI ) and c) at least one wheel (10) interacts with the road, the road contact surface (17) of the wheel is offset with respect to the plane (28) running through the pivot axis (13) and perpendicular to the road to the shoe inner plane (20) and when the roller skate interacts with the level road (16), wherein d) the shoe (1) is in a normal position, e) the chassis (5) is in the second position (A2) and f) at least one wheel (10) interacts with the road surface with respect to the road contact surface (17) of the wheel the plane (28) running through the swivel axis (13) and perpendicular to the roadway is offset from the outer plane of the shoe (21),

A normal position is characterized in that the support surface (24) for the forefoot in the shoe (1) is aligned essentially parallel to the roadway (16).

Roller skate according to one of the preceding claims, characterized in that, in the second position (A2), the chassis (5) against the shoe (1), in particular against the shoe bottom (2), and / or at at least one point eccentric with respect to the pivot axis (13). or against at least one joint attachment piece (3, 301, 302).

Roller skate according to one of the preceding claims, characterized in that the chassis (5) has a rail body (6, 601, 602) on which the wheels (10) are rotatably attached.

7. Roller skate according to one of the preceding claims, characterized in that the roller skate has at least one return unit (18) which acts on the chassis (5) and on the shoe (1) eccentrically with respect to the pivot axis (13) and the pivoting movement of the chassis from causes and / or supports the first position (AI) in the second position (A2).

8. Roller skate according to one of the preceding claims, characterized in that at least part of at least one braking device is attached to the pivotable chassis (5).

9. Roller skate according to one of the preceding claims, characterized in that at least one of the braking devices has at least one hydraulically actuated brake for at least one of the wheels (10).