DE102007036237A1 - Stepping bicycle for use as tricycle e.g. pedal lever bicycle, has sprocket wheel connected with free wheel and fastened to drive wheel, where front or rear frame part is connected with central frame section at fixable hinge or rotary joint - Google Patents

Abstract

The bicycle has a fixable hinge (2) or a rotary joint arranged at a central frame section (1). A front frame part or a rear frame part is foldably and/or rotatably connected with the frame section at the hinge or joint. An adjustable saddle carrier has a saddle and is fastened at the frame section. Two lever arms (7) are rotatably supported at an inner side of half frames (5) and connected one after another by a tread (8). A sprocket wheel is supported at a bearing and stays in connection with a free wheel via a chain. The sprocket wheel is fastened to a drive wheel.

Description

The The invention relates to a tricycle which is driven by pedal levers. This is especially for the disabled and also as a sports equipment Can be used because no frame part exceeded for use and indoor use is possible.

State of the art

The generic bicycles and tricycles are referred to as pedal lever or stepping wheel. In contrast to the usual bicycles is the drive movement not initiated via two pedals on rotating crank arms, but over two levers mounted on one side. The up and down Down movement is due to different gear designs converted a rotational movement of the drive wheel. This drive is more complicated than a direct crank mechanism, but has some Advantages. So the body weight of the person can be better used be (no Radfahrerrundrücken) and the unfavorable power ratio deleted in the range of Kurbelarmtotpunktes. The joint load is This reduces and the possible higher body use has a positive health effect.

Wheels with this type of drive can be executed as a two- or three-wheeler. According to the DE PS 198 11 250 a standard bicycle is converted into a steppower by an additional straight sliding of the pedals. Another solution is through the DE OS 199 22 821 disclosed. The disadvantage of this drive arrangement is that when using the full body weight on the individual pedal lever, the bike must be angled relative to the body. That's why stepwheels do not have a saddle. The person stands here alternately on a pedal surface with lever arm.

To compensate for the lateral tilting moment when loading the pedal lever these stepping wheels are often designed as tricycles. ( DE Gbrm. 299 00 145 ). By doing DE Gbrm. 299 13 684 the movement of the pedal levers is transmitted via a crank drive and chain to the two rear wheels. The unfavorable leverage ratios of a crank mechanism in the dead center are also present here. These designs are large and heavy, which is why transport and parking require a lot of space. By the DE OS 102 42931 For example, a three wheel step bike is known that has a single front wheel that is driven. The two smaller rear wheels are designed steerable. The handlebar can be folded down. This construction is much smaller than the known three-wheelers with steppower. Like tricycles, the tricycles have to be climbed sideways over the frame, which is difficult or impossible for the elderly and disabled.

A tricycle with stepping drive, which has a rear divided, open frame is through the DE Gbrm. 200 03 301 known. Each frame side carries a wheel and has its own stepping drive. The user can step between the divided frames from the back and get on and off easier. A seating facility is not available. The drive consists of simple pedal levers, as with conventional bicycles. The small footprint is uncomfortable and there is a risk of slipping. The pedal levers are pulled back by springs in a high initial position and th de tenet down to the stop. For disabled persons this is unfavorable because the feet must be raised high and the stroke is unchangeable large. Furthermore, the tricycle is very bulky.

Object of the invention

task The invention is a stepping bicycle with three wheels to create that is easy and safe to use and little footprint requires a sitting or a seat in which to get up and down easily Stand by while driving and folding through to allow the construction.

These objects are achieved according to the features of claim 1. The stepping bicycle has a central frame section ( 1 ) with at least one lockable joint ( 2 ) or a lockable rotary joint on which the front frame part ( 3 ) or back frame part ( 4 ) hinged, or rotatable connected to this. An adjustable saddle carrier ( 6 ) with saddle is at the central frame section ( 1 ) attached. On the inside of the half frame ( 5 ) are behind each other two lever arms ( 7 ) pivotally mounted and by a tread ( 8th ), in each case a bearing is mounted a sprocket that is connected via a chain with the rear wheel attached to the sprocket with freewheel in combination.

By This solution will be either standing or standing Sitting possible. The treads are easy too enter and prevent slipping. The multi-part frame with lockable hinge is hinged and therefore easy to transport and turn off. Especially elderly or disabled persons Can this stepping bike to driving and for use a sports activity.

The dependent claims 2 to 4 relate to advantageous variants of the frame. The construction according to claim 2 is folded flat ( 1 ). On the frame according to claim 3, the front frame part can be pivoted downwards between the half-frames ( 2 .) According to An Award 4, the front frame part folded sideways and the half frame can be pushed together laterally.

A Particularly favorable training of the stepping drive is in the claims 5 and 6 included. By an additional Parallel guide according to claim 5 is the tread always kept horizontal. The adjustable Preload for the return movement of the lever arms according to claim 6 allows a low position of the tread when getting on and off, as well as a limitation of the stroke.

A preferred embodiment according to claim 7 relates to a saddle to be climbed from behind. Through the side hinged seat, the saddle is folded down very narrow and can be crossed from behind when ascending. Subsequently The seat is opened by means of cable and allows a comfortable sitting.

Examples

following the invention should be closer to an embodiment be explained.

1 shows the frame variant 1 in the plan view,

2 the frame variant 2 in spatial representation,

3 the frame variant 3 in spatial representation,

4 and 5 the details of the stroke adjustment and

6 the drive with parallel guide in the side view.

7 the saddle in the side view

8th the saddle in the rear view

According to 3 consists of the central frame section 1 from three U-shaped pipe sections, which are welded to laterally arranged sheets to form an elongated box. The upper, horizontal pipe section protrudes forward and is there with a lockable joint 2 welded. The counterpart is welded to an oval, bent up tube section. At the end of an approximately vertical pipe guide is attached. This carries the front fork and the handlebars. These elements form the front frame part 3 by the lockable joint 2 is hinged on the side. The rear approximately vertical pipe section of the central frame section 1 , picks up the saddle rack for the saddle. At the front, lower area of the central frame section 1 are at a distance superimposed two pipe sections welded transversely. In these are the sides of the half frame 5 inserted and fixed by screws. The half frames 5 also consist of two superposed, connected pipes that extend at an angle bent parallel backwards.

At the end of a wheel with sprocket is stored outside. In front of the two wheels are at a distance according to 6 two lever arms each 7 inside on the half frame 5 stored. At the ends of these are rotatable with a tread 8th connected. On the front Hebelarmlagerung outside a sprocket is mounted and with the lever arm 7 connected by a wave. Over both sprockets runs a chain. Inside, two additional sprockets are mounted on the Hebelarmlagerungen over which runs a common chain. This arrangement also ensures one-sided loading of the tread 7 a horizontal position and prevents blocking. An adjusting device according to the 4 and 5 is attached to the drive sprocket, so that the spring tension and thus the lifting height is adjustable via a wire cable. A saddle with down and fold-up seats 13 makes getting on the tricycle easier from the back. Further variants within the scope of the invention are possible.

1

centrally frame section

2

ascertainable joint

3

Front frame part

4

Rear frame part

5

half frame

6

caliper support

7

lever arms

8th

tread

9

cable anchoring

10

guide profile

11

Rope guide tube

12

seatpost

13

seat

14

steel cable

15

joint support

16

joint

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 19811250 [0003]
• - DE 19922821 [0003]
• - DE 29900145 U [0004]
• DE 29913684 U [0004]
• - DE 10242931 [0004]
• - DE 20003301 U [0005]

Claims (7)

Stepping bike with three wheels and free entry and a pedal lever drive, in which the up and down movement is converted by a gear in a rotational movement of the drive wheel, a central frame section, at the front of a front frame part for the front wheel with handlebar and rear U-shaped rear frame part consisting of two half-frames, is fastened, each half-frame carries a stepping drive and a wheel connected thereto, characterized in that at the central frame portion ( 1 ) at least one lockable joint ( 2 ) or a lockable rotary joint is arranged, on which the front frame part ( 3 ) and or back frame part ( 4 ) hinged or rotatable connected to this, an adjustable saddle carrier ( 6 ) with saddle on the central frame section ( 1 ), on the inside of the half frame ( 5 ) in succession two lever arms ( 7 ) pivotally mounted and by a tread ( 8th ) are connected to a respective bearing a sprocket is mounted, that is connected via a chain with the rear wheel attached to the drive sprocket with freewheel in combination. Stepping bicycle according to claim 1, characterized in that the central frame section ( 1 ) consists of a longitudinal, horizontal lying, widening towards the back box profile, at the front end of the box profile, the front wheel is mounted with handlebar, the half frame ( 5 ) at the rear end of the box profile horizontally pivotable in lockable joints ( 2 ) are mounted and a horizontal cross strut with three vertical swivel joints, the two half-frames ( 5 ) in front of the front lever arms ( 7 ) hinged connects. Stepping bicycle according to claim 1, characterized in that the central frame section ( 1 ) consists of a longitudinal, vertical box section, at the front end of the box profile, the front wheel is mounted with handlebar, the rear frame part ( 4 ) is vertically pivotally mounted at the lower, rear end of the box profile with a transverse strut, a second transverse strut of the rear frame part ( 4 ) limits the possible pivoting movement by stop on the box section and the adjustable saddle carrier ( 6 ) with saddle at the top of the central frame section ( 1 ) is mounted vertically pivotable. Stepping bicycle according to claim 1, characterized in that the front frame part ( 3 ) consists of a hollow profile, at the front of the front wheel with handlebar and rear a lockable joint ( 2 ), with which this with the front, upper central frame portion ( 1 ), at the lower central frame portion ( 1 ) are mounted cross-tubes one above the other, in which slidably and lockable consisting of two bent tubes each half frame ( 5 ) are guided. Stepping bicycle according to claim 1, characterized in that on the inside of the half-frame ( 5 ) in succession two lever arms ( 7 ) pivotally mounted and by a tread ( 8th ), outside of the respective front bearing a sprocket is mounted, that is connected via a chain with the behind the drive wheel sprocket with freewheel in conjunction and in addition as a parallel guide on each bearing inside a sprocket is mounted, which are interconnected by another chain are. Stepping bicycle according to claim 1 and 5, characterized that on the drive gear a cylindrical housing achsfluchtend is fixed, in which a coil spring is guided, the on the sprocket and with the other end outside the Housing is supported on a sleeve, the is rotatably mounted on the housing, on the sleeve a pull rope is wound, with the free end with an adjustment lever is connected, so that the spring travel and thus the restoring force is adjustable to the lever arm. Stepping bicycle according to one of claims 1 to 4, characterized in that the saddle a longitudinally split seat ( 13 ) attached to a guide profile ( 10 ) is hinged on both sides down, front of the guide profile ( 10 ) a cable anchorage ( 9 ) is mounted lever-shaped, two steel cables attached thereto ( 14 ) by a cable guide tube ( 11 ) under the saddle up to two joints ( 16 ) and there with two joint supports ( 15 ) and the upper ends of the joint supports ( 15 ) hinged to the rear seats ( 13 ) are connected.