WO2020093077A1

WO2020093077A1 - Vehicle having at least one front wheel

Info

Publication number: WO2020093077A1
Application number: PCT/AT2019/000031
Authority: WO
Inventors: Markus Hager; Michael Felder
Original assignee: Saem Gmbh & Co Kg
Priority date: 2018-11-07
Filing date: 2019-10-31
Publication date: 2020-05-14
Also published as: AT521674A4; DE112019004834A5; AT521674B1

Abstract

The invention relates to a vehicle having at least one front wheel (1), which can be steered by means of a steering frame (6) that is attached to a steering column (7), wherein the steering column (7) has a guide tube (10) and a pull-out rod (9) which is displaceably guided by the guide tube (10) between a pushed-in state and a pulled-out state and which, in the pulled-out state, is secured by a detent element (21) against being pushed into the guide tube (10). For the displaceable guidance of the pull-out rod (9) in the guide tube (10), rollers (14-17), which roll along opposite raceways (34, 35) of the guide tube (10), are rotatably supported on the pull-out rod (9), wherein end sections of the raceways (34, 35), in the area of which the rollers (14-17) are located in the pulled-out state of the pull-out rod (9), are formed by raceway pins (25-27), which are inserted into a top section (13) of the guide tube (10).

Description

Vehicle with at least one front wheel

The invention relates to a vehicle with at least one front wheel which can be steered by means of a steering bracket which is attached to a steering rod, the steering rod having a guide tube and an extension rod which is displaceably guided by the guide tube between an inserted state and an extended state, which is secured in the extended state by a locking element against insertion into the guide tube.

In particular, scooters with pull-out handlebars are known. The handlebar can be used to stow or transport the scooter

folded down and pushed together to the pack size

reduce. Scooters with electric drive designed in this way too

(Electric scooters) are known. To fix the two tubes of the handlebar against each other in the extended state of the handlebar, it is known one

Insert clamping device. Such a scooter emerges, for example, from DE 19 045 821 A1. So that a quick adjustment of the length of the handlebar is possible, such clamping mechanisms are usually designed as quick releases. To ensure that the length of the handlebar is reliably fixed, the user must apply a correspondingly high clamping force. To ensure a fully extended condition of the handlebar, are also

Known locking elements, which are arranged on one of the tubes and in one

Snap the recess into the other tube. Such locking elements are usually still combined with a clamping device so that freedom from play is achieved in the extended state of the handlebar. To push the handlebar together, the clamping device must first be opened and then the locking element must be actuated.

The object of the invention is to provide a vehicle of the type mentioned in to provide advantageously designed telescopic handlebar. According to the invention, this is achieved by a vehicle with the features of

Claim 1.

In the vehicle according to the invention are for sliding guidance

Pull-out rod rotatably mounted on the pull-out rod with respect to the guide tube, which roll along opposite first and second raceways of the guide tube. End sections of the raceways, in the area of which the rollers are in the extended state of the pull-out rod, are formed by raceway pins. These are inserted into a head section of the guide tube.

Pins, which form raceways, can be placed in exact mutual alignment in the head section of the guide tube during the manufacture of the handlebar. The roles can thus with very little play between the

End sections of the raceways can be performed, which in the extended

Operating condition of the handlebar an almost complete backlash can be achieved in relation to the direction in which the opposing raceways are spaced from each other (this direction is therefore perpendicular to the axes of rotation of the rollers and perpendicular to the direction of extension) without a clamping mechanism being available and actuated for this must become.

In particular, the raceway pins are cylindrical pins.

In an advantageous embodiment of the invention, at least two rollers rotatably mounted on the pull-out rod roll on each of the two opposite raceways of the guide tube. It would also be conceivable and possible, however, that at least two rollers rotatably mounted on the pull-out rod roll on one of the opposite raceways and only one roller rotatably mounted on the pull-out rod on the other of the opposite raceways. In order to also achieve very little play in the extended operating state of the handlebar in the direction parallel to the axes of rotation of the rollers, it is provided in an advantageous embodiment of the invention that in the regions of the end sections of the raceways in which the rollers are in the extended state of the extension rod guide pins on both sides of the rollers

are arranged, which guide the rollers laterally. When producing the

Handlebars such guide pins can in turn be placed exactly in the head section of the guide tube.

In particular, the guide pins are cylindrical pins.

Another way to achieve at least a substantial freedom of play in the direction parallel to the axes of rotation of the rollers mentioned would be to design the lateral surfaces of these rollers with grooves into which the

opposite raceway pins which form the opposite raceways engage. This means that the rollers are guided laterally by the opposing raceway pins. The guide pins could be omitted in such training.

In principle, it would also be conceivable and possible that, in order to achieve at least substantial backlash in the direction parallel to the axes of rotation of the rollers mentioned, further rollers are rotatably mounted on the pull-out rod, which roll on raceways of the guide tube, which are spaced apart in this direction. End sections of these further raceways, in the area of which the further rollers would be in the extended state of the pull-out rod, could in turn be formed by further raceway pins which are inserted into the head section of the guide tube and are in particular designed as cylindrical pins.

Advantageously, an almost complete backlash can thus be achieved in the extended operating state of the handlebar, without a clamping mechanism being present and having to be actuated. The head section of the guide tube is advantageously formed by a separate unit which is connected to a tube part of the guide tube, for example by means of the guide pins which protrude from this unit. The career pens could also be used instead or in addition. This separate unit advantageously has a first and a second head piece, the first and the second head piece being connected to one another by the guide pins and / or raceway pins.

The various pins are advantageously made of steel, while the

Guide tube can also consist of aluminum. Forces acting on the pins can thus be transmitted over a large area to the guide tube, in particular its head section. In the pulled-out state of the pull-out rod, relatively high forces can thereby be absorbed without impairing the freedom of play of the pull-out rod relative to the guide tube in the pulled-out state.

The pull-out rod advantageously has an outer tube made of aluminum. An inner tube, from which an end section protrudes from the lower end of the outer tube, can be fixed therein, the rollers being rotatably mounted on this protruding section of the inner tube. The inner tube is preferably made of steel.

In a preferred embodiment of the invention, the vehicle instructs

Running board. A user can stand on this in the manner of a scooter. The drive of the vehicle can be done according to a muscle power

Kick scooter or by a motor, especially an electric motor. Such a vehicle is also called an electric scooter.

Further advantages and details are explained below with reference to the accompanying drawing. In this show:

Fig. 1 is a side view of a vehicle according to an embodiment of the Invention in the folded and closed transport state of the handlebar;

FIG. 2 shows a side view corresponding to FIG. 1 in the folded-up but still closed state of the handlebar;

Fig. 3 is a side view corresponding to Fig. 3 in the up and

exploded operating state of the handlebar;

Fig. 4 is an oblique view of the vehicle in the state of Fig. 3;

Fig. 5 is an enlarged detail A of Fig. 4;

Figure 6 is an oblique view of the pull rod of the handlebar with the rollers mounted thereon.

FIG. 7 shows an enlarged detail B from FIG. 6;

8 is an exploded view;

9 shows an upper section of the guide tube with the head section shown removed;

10 is an exploded view of the head portion;

Fig. 11 is a section along the line CC of Fig. 3;

Fig. 12 is a section along the line DD of Fig. 11;

13 shows a section along the line EE of FIG. 11;

14 shows a section analogous to FIG. 11, but after releasing the latching mechanism and with the pull-out rod already somewhat inserted.

An embodiment of a vehicle according to the invention is shown in the figures. The vehicle is in the embodiment shown as a tricycle

formed, being a single front wheel 1 and two along one

common rear wheel has spaced rear wheels 2.

For example, only a single rear wheel can be provided.

The vehicle has a vehicle body with a running board 3. From

Vehicle body, the wheel axle of the rear wheels 2 is rotatably mounted.

The front wheel 1 is rotatably mounted on a support unit 4. The support unit 4 is connected to the vehicle body so as to be rotatable about a steering axis 5. The support unit 4 with the front wheel 1 can be rotated about the steering axis 5 by means of a steering bracket 6.

The steering bracket 6 is attached to the upper end of a handlebar 7. The

Handlebar 7 is connected to the support unit 4 so as to be pivotable about a pivot axis 8. By pivoting the handlebar 7 about the pivot axis 8, the handlebar can be adjusted between a folded-down state (FIG. 1) and a folded-up state (FIG. 2-FIG. 4). When the handlebar 7 is folded up, it can be locked in relation to the support unit 4. This lock is not shown in detail in the figures and can be designed according to the prior art. A lock is preferably also present when the handlebar 7 is folded down.

The handlebar 7 is telescopic, so extendable and collapsible. In the folded-down state, the handlebar 7 can advantageously assume a closed transport state, cf. Fig. 1. After

Unfolding a pull-out rod 9 of the handlebar can be pulled out of a guide tube 10 of the handlebar until the handlebar assumes the extended operating state, cf. Fig. 4. The pull rod 9 and the guide tube 10 have longitudinal central axes 32, 33 which lie on a common straight line.

The rear wheels 2 can be driven by an electric motor that is not visible in the figures. Then it is among other things a corresponding accumulator is also available.

When using the vehicle, the user stands on the footboard 3 while holding sections of the steering bracket lying on both sides of the handlebar 7 with his hands.

The guide tube 10 has a tube part 12 which projects into a socket 11 at its lower end and is rigidly connected to the latter. The socket 1 1 is pivotally connected to the support unit 4 about the pivot axis 8. The pipe part 12 is preferably made of aluminum.

The guide tube 10 furthermore has a head section 13 which is formed by a separate unit which is rigidly connected to the upper end of the tube part 12. This head section 13 is described in more detail below.

The pull-out rod 9 is preferably tubular. in the

In the exemplary embodiment, it has an outer tube 9a and an inner tube 9b. The lower end of the inner tube 9b protrudes from the outer tube 9a. The upper end of the inner tube 9b extends to the upper end of the outer tube 9a, but could also be made shorter.

In the section of the inner tube 9b protruding from the outer tube 9b, rollers 14-17 are rotatably mounted on the inner tube 9b. The rollers 14-17 are arranged between the broad side walls of the inner tube 9b and the narrow side walls of the inner tube 9b are provided with recesses through which the rollers protrude from the interior of the inner tube 9b. To hold the rollers 14-17 on the broad side walls of the inner tube 9b, bolts 18 are provided, which are inserted into bores in the wide side walls of the inner tube 9b.

In the exemplary embodiment, the rollers 14-17 are formed by ball bearings, preferably as they are commercially available. The inner rings 19 of this

Ball bearings are carried by the bolts 18 which are fixed to the inner tube 9b. The outer rings 20 of the ball bearings form the rims of the rollers 14-17. The inner rings 19 of the ball bearings form hubs of the rollers 14-17.

The inner rings 19 of the ball bearings are held in the lateral direction between projections 38 on the inner sides of the inner tube 9b. The outer rings 20 of the ball bearings are exposed to the inner tube 9b by depressions 39.

The machining of the section of the tube projecting from the outer tube 9a Inner tube 9b can advantageously be done by lasering. As a result, the bores for the bolts 18 and the projections 38 on the inner sides of the inner tube, which hold the inner rings of the ball bearings, can be formed very precisely in a clamping position.

The outer tube 9a is preferably made of aluminum. The inner tube 9b is preferably made of steel.

On the section of the inner tube 9b protruding from the outer tube 9a

A bolt-shaped locking element 21 is also arranged. This can be pressed in against the restoring force of a spring. In the exemplary embodiment, the bolt-shaped locking element 21 is displaceably mounted in a sleeve 23, the spring 22 being supported between a step in the inner diameter of the sleeve 23 and the locking element 21. The sleeve 23 is held in a bore of a holding part 24 which is fastened to the inner tube 9b. The walls of the inner tube 9b are provided with a corresponding recess for receiving the holding part 24.

Designs of the pull-out rod 9 other than in the form of a double-walled tube are also conceivable and possible. Other rotatable bearings of the rollers 14-17 at a lower end section of the pull-out rod 9 are also conceivable and possible. The rollers 14-17 could also be in a different way than in the form of

Ball bearings can be formed.

The head section 13 has a first head piece 13a and a second head piece 13b, which are tubular and preferably made of aluminum

consist. Pins 25-31 are inserted into the first and second head pieces 13a, 13b.

The pins 25-31 are preferably cylindrical, as can be seen from the figures. The head pieces 13a, 13b point parallel to the longitudinal central axis 33; holes in the guide tube. These bores are open over part of their circumference to the interior of the respective head piece 13a, 13b. The open section of the holes extends less than 180 °. When the pins 25-31 are inserted into the holes, they protrude above one Section of its circumference out of the inner wall of the respective head piece 13a, 13b.

The pins 25-31 are preferably made of steel.

Pins 25-31 could also be referred to as dowel pins.

When the pull-out rod 9 is pulled out of or inserted into the guide tube 10, the rollers 14-17 roll along opposite ones

Raceways 34, 35 of the guide tube 10. Over most of their extension, the raceways 34, 35 are formed by the inner surface of the tubular part 12. End portions of the raceways 34, 35 located in the region of the head section 13 are formed by the raceway pins 25-27, specifically from the circumferential sections of these raceway pins 25-27 protruding from the open peripheral sections of the bores in the head pieces 13a, 13b.

In the exemplary embodiment, the end portion of the track 34 is one

continuous career pin 25 formed. The end section of the

Opposing track 35 is formed by the two track pins 26, 27. Through a gap between them, in the area of which the track 35 is thus interrupted, the latching element 21 can engage in the recess 36 on the head section 13 in order to lock the pull-out rod 9 and the guide tube 10 with one another, that is to say against one another, when the pull-out rod 9 is pulled out lock.

When the pull-out rod 9 is displaced relative to the guide tube 10, the rollers 14, 15 roll on the raceway 34 and the rollers 16, 17 roll on the raceway 35. Two of the rollers 14-17 are therefore provided for each of the two opposing raceways 34, 35, these two rollers being spaced apart from one another in the direction of the longitudinal central axis 32 of the pull-out rod 9. In the extended state of the pull-out rod 9, in which this by means of

locking mechanism described is locked against the guide tube 10, the one two rollers 14, 15 spaced apart from one another in the direction of the longitudinal central axis 32 lie in the region of the end section of the raceway 34 and the other two in the direction of the longitudinal central axis 32 from one another

spaced rollers 16, 17 lie in the region of the end section of the track 35.

The rollers 14-17 thus interact with the raceway pins 25-27 when the extension rod 9 is in the extended state.

In the area of the described end sections of the raceways 34, 35, that is to say in the area of the head section 13 of the guide tube 10, the rollers 14-17 are further guided between guide pins 28-31, namely through the open ones

Circumferential portions of the bores in the head pieces 13a, 13b projecting peripheral portions of the guide pins 28-31. The rollers 14-17 are thereby guided laterally, that is to say in relation to the directions lying parallel to the axes of rotation of the rollers 14-17. This prevents lateral movement of the rollers 14-17. In other words, the rollers 14-17 are guided through the guide pins 28-31 almost without play in the lateral direction.

The rollers 14, 15 cooperating with the raceway 34 lie in the region of the end section of the raceway 34 between the guide pins 28, 29 and the rollers 16, 17 interacting with the raceway 35 lie in the region of the end section of the raceway 35 between the guide pins 30, 31

The pins 25-31 can be in a very precisely defined position in the

Head section 13 are arranged. For this purpose, the bores into which the pins 25-31 are inserted can be introduced into the respective head piece 13a, 13b in a single clamping position. So it doesn't work

Tolerances in the manufacture of the head pieces 13a, 13b into the tolerances of the mutual arrangement of the pins 25-31, but only the tolerances in the introduction of the holes receiving the pins, these tolerances being able to be kept very low. As already described, the rotatable bearings of the rollers 14-17 at the end section of the pull-out rod 9 can be designed with very small tolerances with respect to the mutual distances between the axes of rotation of these rollers 14-17 and with respect to the axial alignment of these rollers 14-17. The tolerances in the production of the inner tube 9b are thus for the tolerances of the rotatable

Storage of rolls 14-17 is not relevant.

Overall, the rollers 14-17 and the pins 25-31 can be very precise

to be ordered. As a result, the play occurring in the extended operating state of the handlebar 7 between the pull-out rod 9 and the guide tube 10 can be kept very low, without requiring a special one

Clamping mechanism must be operated. When the pull-out rod 9 is fully extended, the locking element 21 snaps into the recess 36 and the vehicle is immediately ready for operation. To push the handlebar 7 together in the moved-together transport state, only the latching element 21 has to be pressed in, so that it comes out of the recess 36. in the

To this end, an exemplary embodiment is displaceably mounted in the head section 13, by pressing the locking element 21 out of the

Recess 36 is pushed out.

By the interaction of the rollers 14-17 with the pins 25-31 in

extended operating state of the handlebar 7 can also be high on the

Handlebar 7 acting bending forces are added. If 9 bending forces act on the upper end of the pull-out rod, which are perpendicular to

Longitudinal central axis 32 of the pull-out rod 9 act, these are transferred via the rollers 14-17 rotatably mounted on the pull-out rod 9 to the pins 25-31 arranged in the head section 13 of the guide tube 10. Forces acting on the pins 25-31 are transmitted over a large area to the head section 13.

To attach the unit forming the head portion 13 protrude in

Embodiment, the guide pins 28-31 out of the lower end of the lower head piece 13b and are inserted into bores which are in the tubular part 12th are introduced and, starting from the upper end of the tubular part 12, run parallel to the longitudinal central axis 33 of the guide tube 10. The bores can be open over a section of their circumference to the inside of the tubular part 12 (cf. FIG. 9). In order to secure the pins 25-31 in the bores of the head section 13 and the bores of the tubular part 12, gluing can be provided. To attach the unit forming the head section 13, protruding sections of the raceway pins 25-27 could be used instead or additionally at the lower end of the lower head piece 13b.

The main sections of the raceways 34, 35 formed by the inner surface of the tube part 12 are delimited on both sides by corresponding profiling of the pipe part 12, so that the rollers 14, 17 are also guided in the lateral direction in the region of the main sections of the raceways 34, 35, albeit with greater play than in the area of the head section 13.

Different modifications of the exemplary embodiment of the invention shown are conceivable and possible without leaving the scope of the invention. For example, it is conceivable and possible to provide a single head piece instead of two separate head pieces 13a, 13b, in which the pins 25-31 are inserted. In principle, it would also be conceivable and possible to arrange the pins 25-31 directly in the upper end of a tube part, so that a separate unit, which the

Forms head section 13, could be omitted.

The locking mechanism, by means of which the pull-out rod 9 is locked in its extended state with respect to the guide tube 10, can be designed in different ways.

It could also be provided that one of the opposite

Raceways 34, 35 cooperate only a single role, while at least two in the direction of the other of the opposite raceways

Longitudinal central axis 32 of the pull rod 9 spaced rollers interact. Preferably, however, each of the two opposing raceways 34, 35 each have at least two rollers 14-17 together.

In a further modified embodiment, the lateral surfaces

(= Running surfaces) of the rollers 14-17 have grooves in which the opposite raceway pins 25-27, which form the opposite raceways 34, 35, engage. The rollers 14-17 are thereby guided laterally by the raceway pins 25-27. The guide pins 28-31 can thus be omitted in this embodiment. In this exemplary embodiment, the rollers 14-17 can advantageously be formed by grooved ball bearings, the outer rings of which form the running rings of the rollers 14-17 and the inner rings of which form the hubs of the rollers 14-17. Another possibility would be to form a separate ring with a groove in the outer surface for forming the rollers 14-17 on an outer ring of a ball bearing, which has a cylindrical outer surface (outer surface). In particular, if there are no guide pins 28-31, the

Fastening of the head section 13 to the pipe part 12 is carried out by means of screws which extend through the head section 13 or at least a part thereof and engage in bores in the pipe part 12. In this exemplary embodiment, the head section 13 could be formed in one piece or in turn could have at least a first and a second head piece 13a, 13b. The head pieces 13a, 13b could be connected to one another by the screws mentioned or by additional screws.

Legend

to the reference numbers: front wheel 25 track pin rear wheel 26 track pin footboard 27 track pin support unit 28 guide pin steering axle 29 guide pin steering bracket 30 guide pin steering rod 31 guide pin swivel axis 32 longitudinal center axis extension rod 33 longitudinal center axis outer tube 34 raceway

b inner tube 35 raceway

0 guide tube 36 recess1 bush 37 actuating element2 tube part 38 projections

3 head section 39 recesses 3a head piece

3b head piece

4 roll

5 roll

6 roll

7 roll

8 bolts

9 inner ring

0 outer ring

1 locking element

2 spring

3 sleeve

4 holding part

Claims

1. Vehicle with at least one front wheel (1), which by means of a

Steering bracket (6), which is attached to a steering rod (7), can be steered, the steering rod (7) comprising a guide tube (10) and an extension rod (9) slidably guided by the guide tube (10) between an inserted state and an extended state. has, which is secured in the extended state by a locking element (21) against insertion into the guide tube (10), characterized in that for

slidable guide of the pull-out rod (9) in the guide tube (10) on the pull-out rod (9) rollers (14-17) are rotatably mounted, which roll along opposite raceways (34, 35) of the guide tube (10), end sections of the raceways ( 34, 35), in the area of which the rollers (14-17) are in the pulled-out state of the pull-out rod (9), are formed by raceway pins (25-27) which are inserted into a head section (13) of the guide tube (10) are used.

2. Vehicle according to claim 1, characterized in that on both sides of the rollers (14, 17) located in the regions of the end sections of the raceways (34, 35) guide pins (28-31) are arranged, which in the

Head portion (13) of the guide tube (10) are inserted and the rollers (14-

17) guide laterally.

3. Vehicle according to claim 1 or 2, characterized in that the

Head portion (13) of the guide tube (10) is formed by a separate unit which is connected to a tube part (12) of the guide tube (10).

4. Vehicle according to claim 3, characterized in that the

The head section (13) forming unit is connected to the pipe part (12) by means of the guide pins (28-31) and / or raceway pins (25-27) which protrude from this unit.

5. Vehicle according to one of claims 1 to 4, characterized in that the unit forming the head section (13) has a first and a second head piece (13a, 13b), which by the guide pins (28-31) and / or Career pins (25-27) are connected.

6. Vehicle according to one of claims 1 to 5, characterized in that at one end portion of the pull-out rod (9) at least three rollers (14-17) are rotatably mounted, with at least two of the rollers with one of the opposite raceways (34, 35) (14-17) and at least one of the rollers (14-17) cooperates with the other of the opposite raceways (34, 35).

7. Vehicle according to claim 6, characterized in that at least four rollers (14-17) are rotatably mounted on the end section of the pull-out rod (9), with at least two of the rollers (14-17) each having the opposite raceways (34, 35). Interact.

8. Vehicle according to one of claims 1 to 7, characterized in that the rollers (14-17) are formed by outer rings of ball bearings.

9. Vehicle according to one of claims 1 to 8, characterized in that an actuating element (37) is slidably mounted on the head portion (13) of the guide tube (10), by pressing the locking element (21) out of engagement with the recess (36) is brought and the extension rod (9) can be inserted into the guide tube (10).

10. Vehicle according to one of claims 1 to 9, characterized in that the raceway pins (25-27) and / or guide pins (28-31) are arranged in bores in the head section (13), which over part of their Are circumferentially open to the interior of the head portion (13).