WO2011154848A2

WO2011154848A2 - Front end carriage

Info

Publication number: WO2011154848A2
Application number: PCT/IB2011/002307
Authority: WO
Inventors: Holger Labes
Original assignee: Holger Labes
Priority date: 2010-05-14
Filing date: 2011-05-13
Publication date: 2011-12-15
Also published as: WO2011154848A3; DE102010020485A1

Abstract

The invention relates to a front end carriage, comprising a basic body element (1) which is provided with a releasable articulated coupling (2) for fastening to a vehicle body (3) which has a front wheel and a rear wheel and forms a bicycle, and with two supporting wheels (4) which are arranged offset parallel to each other, as seen in the direction of travel. According to the invention, the articulated coupling (2) is designed as a torsionally rigid connection of the basic body element (1) to the vehicle body (3) in the use position and with respect to a vertical axis, and each supporting wheel (4) is assigned rotatably to the basic body element (1) in the use position and with respect to a vertical axis.

Description

CFT

The invention relates to a trunk truck according to the preamble of patent claim 1.

A stem car of the type mentioned is known from DE 298 17 908 Ul. This consists of a basic body element, which is provided with a detachable universal joint for attachment to a vehicle having a front and a rear two-wheeled vehicle body and two, as seen in the direction of travel offset parallel to each other arranged supporting wheels. The basic body element in this solution consists of tubular supports. Although the articulated coupling has a vertical axis of rotation, but is fixed about a horizontal axis against rotation. As a vehicle body finds a common bicycle use. The two support wheels are rotatably mounted about a horizontal axis, but otherwise rotatably fixed relative to the main body element relative to a vertical axis.

The invention has for its object to improve a stem truck of the type mentioned.

This object is achieved with a stem truck of the type mentioned by the features listed in the characterizing part of claim 1.

According to the invention, it is thus provided that the universal joint is formed in the position of use and with respect to a vertical axis as a rotationally fixed connection of the main body member with the vehicle body and each support wheel in the use position and with respect to a vertical axis of the main body member is rotatably associated. In other words, the solution according to the invention differs from the known prior art in particular in that on the one hand the universal joint for compensating unevenness in the ground now has a horizontal pivot axis. On the other hand, the universal joint is no longer rotatable about a vertical axis, which is compensated by the respective rotatability of the support wheels each about vertical axes of rotation.

Quite apart from the doubt that the solution according to DE 298 17 908 U1 is even functional, the solution according to the invention has the considerable advantage that the trunk car now seen in the direction of travel a rigid unit with the vehicle body (preferably also a bicycle of conventional design , ie with a front and a crank-driven rear wheel) forms. This leads, as experiments have shown, to a very stable driving team, cornering thanks to the about vertical axes (free or steered) pivotable support wheels are also easily possible. Thanks to the pivotability of the Stem car about a horizontal (transverse) axis beyond, as mentioned, the compensation of uneven floors is readily possible.

With regard to other body designs, as are known for example from US 2010/0032925 Al, DE 10 2006 047 004 AI, DE 103 06 778 B4 or EP 1 690 782 AI, the solution according to the invention is characterized in particular by the fact that the Vehicle body for the cultivation of the stem cart only very small change measures are required, namely only the attachment of the aforementioned joint coupling.

Other advantageous development will become apparent from the dependent claims. The prototype trolley according to the invention including its advantageous development according to the dependent claims will be explained in more detail with reference to the drawing representation of various exemplary embodiments.

It shows schematically

Figure 1 is a team from the stem car according to the invention with a conventional bicycle, - Figure 2 the trunk car from the front;

Figure 3 made usable as a stroller, Vorbauwagen invention according to the invention;

Figure 4 shows a Bowden cable construction for the realization of a

Steering connection between the steering of the vehicle body and the support wheels of the stem cart; and

Figure 5 shows a special Anlenkkonstruktion of the

Support wheels provided carrier element on the main body element.

The prototype trolley shown schematically in the figures consists of a base body element 1, which is arranged with a detachable universal joint 2 for attachment to a front and a rear wheel exhibiting two-wheeled vehicle body 3 (commercial bicycle) and two, seen in the direction of travel offset parallel to each other Training wheels 4 is provided. The main body element 1 may, for example, which is not shown separately, optionally be formed of tubular support elements made of metal or a shell-shaped composite body made of plastic. The support wheels 4 have, for example, a distance of 60 to 90 cm from each other.

It is essential for the substructure according to the invention that the articulated coupling 2 is in the position of use (ie, for example, when the team is in motion) and with respect to a vertical axis designed as a rotationally fixed connection of the base body member 1 with the vehicle body 3 and each support wheel 4 in the position of use and with respect to a vertical axis of the base body element 1 (free or - at correspondingly higher design complexity [see below] - steered) is assigned rotatable.

It is particularly preferably provided that the joint coupling 2 of two, via a horizontally extending in use position (transverse) axis 8 joint parts

9, 10 is formed. In this case, one hinge part 9 on the front-end trolley and the other hinge part 10 fixed, but releasably fixed to the vehicle body 3. In addition, the other joint part

10, which is not shown separately, formed with two clamping parts for clamping the vehicle body 3. The joint coupling 2 thus forms, with its two joint parts 9, 10, the only connection between the stem carriage according to the invention and the vehicle body 3. This compound, which of course is correspondingly stable form, can be separated if necessary, in such a way that the one hinge part 9 remains on the trunk car and the other hinge part 10 on the vehicle body 3. It is therefore only this joint coupling 2, which, as shown, is arranged above a front wheel of the vehicle body 3 fixed to the frame, to solve the vehicle, which may also be a motor-driven vehicle or two-wheeled, like usual to use.

Thus, the support wheels 4 (unless they are already provided with a steering system connected to the steering of the vehicle) do not start to oscillate when driving (as known from fast pushed shopping cart) are to improve the driving stability horizontal axes of rotation 12 of the support wheels 4th arranged offset laterally to the above vertical axes (keyword: so-called "caster"). Furthermore, it is provided that an outer diameter of the support wheels 4 corresponds to at least one third of an outer diameter of a wheel of the vehicle body 3, ie the support wheels 4 are comparatively large compared to, for example, a front wheel of the vehicle. For example, on a bicycle with two 28-inch wheels, support wheels between 8 and 12 inches in size have proven useful.

Another special feature of the stem cart according to the invention is that the support wheels 4 are preferably articulated via a correspondingly shaped rocker or fork on a support member 5, which in turn is attached to the base body element 1. This bar-shaped carrier element 5 is hinged to a direction of travel and on the other horizontally oriented (longitudinal) axis 6 pivotally mounted on the base body element 1, wherein the axis 6 is arranged centrally between the two support wheels 4 and thus in alignment with the bicycle. This axle also helps to compensate for uneven floors. By determining the height at which this (longitudinal) axis 6 extends above the ground, influence on the driving stability or the inclination of the vehicle to fall over can also be influenced, whereby heights above the ground of 20 to 80 cm have proved successful. Shown is an embodiment in which the axis 6 is about 20 cm above the roadway level.

As can be seen, this proviso leads to the fact that the driver of the two-wheeled despite the two laterally projecting support wheels 4 on the trunk car "can put in the curve". This leads to a significant improvement in the handling of the entire team, especially at faster speeds. For the standstill of the team (ie, for example, when loading or occupying) or for the slower ride is also provided that the axis 6 between the base body member 1 and the support member 5 is formed lockable. As can be seen, this leads to the fact that the two-wheeled vehicle supported or guided over the two support wheels 4 can no longer fall over, since the carrier element 5 is now fixed in position relative to the main body element 1.

In order to operate this lock easily while driving, joint control is an actuator (not shown) for locking the axle 6 between the base body member 1 and the support member 5 is provided.

As can easily be seen, the stem car is used in particular for transporting children. For this purpose, a seat element 11 is provided on the main body element 1, wherein this preferably, as shown, seen in the direction of travel has two juxtaposed seating area. In addition, the seat element 11 or each seating area has a seat surface 14 and a backrest 15. In addition, a Fußauflagerbereich 16 is provided on the stem truck. For transporting people or children sitting while driving so next to each other on the base body element 1 in front of the driver of the vehicle and look in the direction of travel. The driver thus has the children always in the field of vision, which brings in comparison to well-known trailer constructions a significant safety gain.

Furthermore, with particular reference to FIG. 3, it is particularly preferred that the base body element 1 is provided with at least one further support wheel 7 (preferably with two further support wheels) for forming a pushchair. In this case, the at least one further support wheel 7 is hingedly attached to the base body element 1, so that it can be used as a stem dare just folded up, but not dismantled musa. In addition, a handle 13 for pushing the stem car is arranged on the base body element 1. Thanks to these requirements, the stem car according to the invention is therefore after the separation of the vehicle without further ado to turn into a ready to use stroller, at the same time the bicycle itself directly (without further conversion measures) can be used as such.

As already mentioned above, it can be provided that the supports 4 of FIG. 4 are designed to be steerable. A possible embodiment for this purpose is shown schematically in Figure 4, according to the direction of the support wheels 4 oppositely acting Bowden cables 17, 18 are provided (alternatively comes, for example, a steering via a correspondingly formed hydraulic into consideration). These Bowden cables 17, 18 are on the one hand with a steering of the vehicle body 3 and on the other hand with (at least) a support wheel 4 operatively connected: Figure 4 shows the two Bowden cables 17, 18 which are attached to a Anlenkungsrad 19. The axis of rotation of the Anlenkungsrades 19 corresponds to either the above-mentioned vertical axis about which the support wheels 4 are pivotable, wherein the Anlenkungsrad 19 is rotationally connected to the corresponding fork or rocker of the support wheel 4. However, the representation according to FIG. 4 is equally valid or suitable for an arrangement on the steering of the vehicle body 3, ie with the aid of this Bowden cable construction, a steering movement can be transmitted directly to the support wheels 4, whereby the respective diameter sizes of the steering wheel 4 Anlenkungsrades 19, the ratio between a rotation on the steering and a rotation of the support wheels can be fixed. Typically, the deflection is such that even a small movement of the front wheel of the vehicle body to a slightly larger movement of the support wheels 4 leads. The Anlenkungsrad 19 thus preferably has steering side a larger diameter than stutzradseitig.

In addition, it can be provided that only such a Bowden cable construction is arranged on one of the two support wheels 4. - In this case, a the axes of rotation of the forks or rockers of the support wheels 4 interconnecting belt, in particular a toothed belt, be provided for transmitting a steering movement to the bowdenzugfreie support wheel 4.

Finally, with reference to FIG. 5 (and in contrast to the above explanation, according to which the axis is preferably positioned approximately 20 cm above the roadway plane), the carrier element 5 is arranged on a (partial) circular path 20 with a center point (between corresponding, circularly illustrated guide elements) is mounted displaceably on the main body element 1, wherein the axis 6 forms the center of the circular path 20 and wherein the center of the circular path 20 is arranged in the road surface of the vehicle body 3.

The technical explanation of these provisos is that there is the problem, in particular when dispensing with the above-mentioned caster of the support wheels 4, that the vehicle body 3 and the support member 5 according to the figures 1 to 3 (ver-) pivot about two different axes, if the total combination is steered around a curve. In training wheels 4 with caster, this is still relatively unproblematic; without caster but it comes to considerable tension (especially in the universal joint 2). For this reason, it has proved to be advantageous to provide a construction according to FIG. 5 in which practically a common rotational point of the prototype carriage and vehicle body 3 lying on the roadway plane is realized. LIST OF REFERENCE NUMBERS

1 main body element

2 universal joint

3 vehicle body

4 support wheel

5 carrier element

6 axis

7 support wheel

8 axis

9 joint part

10 joint part

11 seat element

12 axis of rotation

13 handle

14 seat area

15 backrest

16 foot support area

17 Bowden cable

18 Bowden cable

19 articulation wheel

20 circular path

Claims

Patentanaprüche

1. Stem carriage, comprising a base body element (1) formed with a detachable universal joint (2) for attachment to a front and a rear wheel exhibiting two-wheeled vehicle body (3) and two, seen in the direction of travel mutually parallel staggered support wheels ( 4) is provided,

characterized ,

in that the articulated coupling (2) in the position of use and with respect to a vertical axis is designed as a rotationally fixed connection of the main body element (1) to the vehicle body (3) and rotatably associated with each of the support wheel (4) in the position of use and with respect to a vertical axis of the main body element (1) is.

2. Stem carriage according to claim 1,

characterized ,

in that the support wheels {4) are articulated on a carrier element (5) which in turn is fastened to the basic body element (1).

3. stem trolley according to claim 1 or 2,

characterized draws,

that the support wheels (4) are designed to be steerable.

4. stem trolley according to one of claims 1 to 3,

characterized ,

that for controlling the support wheels (4) oppositely acting Bowden cables (17, 18} are provided.

5. Stem carriage according to claim 4,

characterized ,

the Bowden cables (17, 18) are designed to be operatively connected, on the one hand, to a steering of the vehicle body (3) and, on the other hand, to a support wheel (4).

6. stem trolley according to one of claims 2 to 5,

characterized ,

in that the carrier element (5) is articulated on the main body element (1) so as to be pivotable about an axis (6) oriented in the direction of travel and on the other horizontally oriented axis.

7. Vorbauwagen according to claim 6,

characterized ,

that the axis (6) is arranged centrally between the two support wheels {4}.

8. Stem carriage according to claim 6 or 7,

characterized ,

the axle (6) is lockable between the base body element (1) and the carrier element (5).

9. Stem carriage according to one of claims 6 to 8,

characterized geke,

in that the carrier element (5) is mounted on a circular path (20) with a center point so as to be displaceable on the main body element (1), the axis (6) forming the center of the circular path (20).

10. Stem carriage according to claim 9,

characterized ,

the center of the circular path (20) is arranged in the roadway plane of the vehicle body (3).

11. Stem carriage according to one of claims 1 to 10, characterized

in that the basic body element (1) is provided with at least one further support wheel (7) for forming a baby carriage.

12. Stem carriage according to claim 11,

characterized ,

in that the at least one further support wheel (7) is hingedly attached to the base body element (1).

13. Stem carriage according to one of claims 1 to 12,

characterized draws,

in that the articulated coupling (2) is formed from two joint parts (9, 10) connected to one another via an axis (8) extending horizontally in the position of use.

14. Stem carriage according to one of claims 1 to 13,

characterized ,

a seat element (11) is provided on the base body element (1).

15. Stem carriage according to claim 14,

characterized ,

that the seat element (11) seen in the direction of travel has two juxtaposed seating area.