BACKGROUND OF THE INVENTION This application claims the priority of German Application No. 102004011934.1, filed Mar. 11, 2004, the disclosure of which is expressly incorporated by reference herein.
The present invention relates to a front axle unit for a toy vehicle, e.g., for operation on a racetrack, having a chassis which accommodates a rear axle unit as well as a front axle unit with front wheels.
DE 76 16 672 U1 shows a model vehicle having a chassis with a U-shaped cross section whose parallel legs run in the longitudinal direction of the vehicle and support the rear front axles. The front axle has transverse control arms mounted on the legs and in turn connected to front wheels via wheel arms. The wheel base of the front wheels is invariable due to the given construction.
EP 1 275 424 A1 shows a comparable construction in the form of a remote-control, track-guided toy vehicle on a racetrack. The front axle has bearing sections for an axle shaft connected to the front wheels. The wheels are not spring mounted and their wheel base is fixed.
DE 37 22 618 C2 shows a toy vehicle having a vehicle body mounted on a chassis. The chassis has drive wheels and supporting wheels. Different selectable journals for these supporting wheels are provided for the supporting wheels on the two longitudinal sides of the chassis.
SUMMARY OF THE INVENTION An object of the present invention is to provide a front axle unit for a toy vehicle characterized by simple and functional construction. However, the wheel mount for the front wheels of the front axle unit should also operate with a high efficiency.
This and other objects have been achieved by providing a wheel base adjustment device between the front wheels of the front axle unit.
Some of the main advantages achieved with the present invention include the fact that due to the adjustment device for the wheel base of the front wheels, the driving properties of the toy vehicle can be influenced in a controlled manner. The adjustment device is not only simple to operate but also forms an easily implemented construction with the fixation device and the relatively mobile arm sections situated one above the other.
The novel construction is further supported by the gear teeth on the arm sections and an adjustment housing. Finally, the longitudinal control arms on the arm sections for the guidance of the front wheels form an advantageous wheel mount, whereby the longitudinal control arms with the arm sections constitute a shock-mounted composite control arm axle which contributes to a good driving performance of the toy vehicle in a controlled manner.
BRIEF DESCRIPTION OF THE DRAWINGS Other objects, advantages and novel features of the present invention will become apparent from the following detailed description of the invention when considered in conjunction with the accompanying drawings.
FIG. 1 is a perspective view from above of a chassis of a toy vehicle according to the present invention,
FIG. 2 is a similar perspective, enlarged view of a detail of the front axle unit shown inFIG. 1 axle according to the present invention,
FIG. 3 is a partial perspective, enlarged view of a detail fromFIG. 2,
FIG. 4 is an exploded perspective view of the front axle unit shown inFIG. 2,
FIG. 5 is a sectional view along line V-V inFIG. 1.
DETAILED DESCRIPTION OF THE DRAWINGS A toy vehicle1, of which only achassis2 is shown, is provided with aguide groove4 for operation on a racetrack3 shown schematically inFIG. 1. A nose-like guide element5 of aguide mechanism6 engages in theguide groove4 and is connected to thechassis2. Thechassis2 is connected to afront axle unit9 comprisingfront wheels7,8 and to arear axle unit12 havingrear wheels10,11. Thefront axle unit9 and therear axle unit12 are optionally configured as modules or integral structures of thechassis2. In the illustrated embodiment, thefront axle unit9 is a module connected to acentral frame13 of thechassis2.
Anadjustment device14 as seen inFIG. 2 is operative between thefront wheels7,8 of thefront axle unit9, to permit variations in the wheel base (medium wheel base Swm, larger wheel base Swg and smaller wheel base Swk) to be able to connect bodies of different sizes, for example, to thechassis2, i.e., to achieve desired dynamic driving effects. Theadjustment device14 is provided on atransverse member15 having twoarm sections16,17 situated one above the other (see alsoFIG. 4). Thearm sections16,17 are configured to be relatively mobile (in directions RI and RII) in relation to one another, but they can also be locked in position byfixing device18. Thearm sections16,17 of thetransverse member15 run across or transversely to the longitudinal direction A-A of the vehicle and have approximatelyrectangular plates19,20 (FIG. 4) which are provided onlongitudinal sides21,22 with first gear teeth Vze. The first gear teeth Vze cooperates with the second gear teeth Vzz of anadjustment housing23 of thefixation device18. Theadjustment housing23 has a U-shapedcross section24 withlegs25,26 which serve to accommodate theplates19,20 of therespective arm sections16,17. The second gear teeth Vzz are arranged on the inside of thelegs25,26. Acatch part27, which holds thearm sections16,17 in position in theadjustment housing23, sits on theadjustment housing23 above the U-shapedcross section24. Theadjustment housing23 is mounted on afront axle frame28 of thefront axle unit9.
Thearm sections16,17 are connected to respectivelongitudinal control arms29,30 aligned in the longitudinal direction A-A of the vehicle adjustment to thefront wheels7,8. Theselongitudinal control arms29,30 run approximately horizontally in a basic design position and, together with thearm sections16,17, form a compositecontrol arm axle31. Thearm sections16,17 are therefore configured to have spring elasticity, with thefront wheels7,8 adapting to the properties of the road surface of the racetrack3 via thelongitudinal control arms29,30 in operation of the toy vehicle1. On thefree sides32,33, thelongitudinal control arms29,30 have fork-like receptacles34,35 forbearing bushings36,37 which surround anaxle38 carrying thefront wheels7,8. Thelongitudinal control arms29,30 run in front of theaxle38 as seen in the travel direction B.
Thefront axle frame28 of thefront axle unit9 is brought up to thecentral frame13 withlongitudinal arms39,40 extending in the vehicle longitudinal direction A-A with vertical threaded bores41 (FIG. 5) integrated where into. Thelongitudinal beams39,40 are mounted on abase frame42 byscrews43 which are screwed into the threadedbores41 from the under side44 of thebase frame42. Finally, thelongitudinal beams39,40 are connected toguide walls45,46 of thecentral frame13.
The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.