DE20006137U1 - Link wheels (link wheels with differential sprockets / compensating belt wheels for a stepless, adjustable chain drive / belt drive) - Google Patents

Description

DESCRIPTION Reference number: 200 06 137.2

Chain drive or belt drive for continuously adjustable speed control

It is known that the adjustment range for gears with 2 expansion disks is 10:1. Conventional adjustable belt gears differ from gear-step gears in that adjustment is less convenient at low speeds, because as the speed decreases, they become harder and slower to adjust. As a result, the power that can be transmitted decreases. In addition, the gear can only be adjusted while running (see Alfred Böge, Techniker-Handbuch, Verlag Vieweg, 15th edition, p.956). The invention specified in the patent claim has the advantage of working without great effort and even when the machine is at a standstill.

A further advantage is that the chain drive can use standardized finished parts (roller chains DIN 8187) instead of expensive special chains. Depending on the area of application, all types of belts with suitable compensating pulleys can also be used.

A further development of the claimed patent makes it possible to use continuously variable chain drives with differential gears in the automotive sector with considerable advantages. In comparison to conventional continuously variable chain drives, such chain drives with differential gears require less effort when adjusting the track radii, despite their high level of efficiency.

An embodiment of the invention is shown in the drawing and is described in more detail below.

The illustrations Fig.l and Fig.2 show an example of one of many possible designs of a continuously variable chain transmission with the features listed in the patent claim.

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Explanation of the invention

based on the drawings according to structure and, if applicable, mode of operation

The drive shaft and output shaft (rotating in the same direction) are connected in a rotationally fixed manner to the two link wheels 1 and 2, which carry several radially running link tracks (item 30) for one link block each. With the help of the link blocks, the compensating chain wheels that provide the drive (roller chain wheels with freewheel and backstop, items 10...17 on link wheel 1 and items 18...25 on link wheel 2) are each adjusted radially symmetrically to the link wheels; the freewheel and thus the locking effect of the compensating chain wheels act in opposite directions on the drive and output link wheels.

The power is transmitted via a single or multi-link roller chain 3 (drawing) (e.g. DIN 8187); during the forced radial-concentric adjustment of the compensating sprockets, their effective distances (chords of the shaft-concentric effective circle) change; this difference is compensated by the freewheeling of the compensating sprockets both when stationary and during the rotation of the link wheel, whereby a continuous change in the speed between the minimum and maximum value is achieved.

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The names of the positions shown in the drawing are shown in the following table.

Pos. Crowd 2 16 designation DIN abbreviations
Factory standard 1 1 Drive wheel (joint wheel) 2 1 Output gear (joint gear) 3 1 Chain DIN8187 4 2 Electric motor 5 Mounting option for electric motor 6 Possibility of mounting on a
Body 7 4 Possibility of attachment to a
drive(motor drive) 8th 16 Hypoid gear 9 2 Hypoid gear 10..
-25 16 Compensating sprockets 26 2 Contact option for power supply
(negative pole) 27 2 Contact option for power supply
(positive pole) 28 2 Mounting option for contact pins 29 ball-bearing 30 Worm wheel (threaded rod)

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The long worm gears 30 on the slide tracks
(Drawing) are used to adjust the sliding blocks
(balance gears) are used; they are turned up and down with the help of the hypoid gears by an electric motor 4 (drawing).

The link wheels 1 and 2 (drawing) run over freewheels 29 (ball bearings).

The link wheels 1 and 2 (drawing) are attached to a body at pos.6.

At pos.7, the link gear 1 is connected to a drive (link gear 2 to an output).

The power transmission runs via the chain 3(drawing).

The drawings are not drawn to exact dimensions and serve only as an aid to the description (explanation).

Reference number: 200 06 137.2
Owner/
Registrant: Serkan Doganer, Mozartstr. 10a, 22083 Hamburg

Claims (2)

1. Adjustable chain drive, or belt or toothed belt drive as torque converter for stepless adjustment of the speed, especially for vehicles and machines, - where a torque converter is required, - the chain drive consists of one adjustable and one fixed disc or two adjustable discs (wheels), - and requires a chain or belt as a driving agent. 2. Adjustable chain drive according to claim 1, - Link wheels with compensating chain wheels/compensating belt wheels (with freewheel and backstop) as structural units for continuously adjustable (positive-locking) chain drive (according to patent claim 1), in which the drive shaft and output shaft (rotating in the same direction) are connected in a rotationally fixed manner to the two link wheels, which are characterized in that several radially extending link tracks each carry a link block, with the help of which the compensating chain wheels (roller chain wheels or belt/toothed belt wheels with freewheel and backstop) causing the rotation are each adjusted radially symmetrically to the link wheels; freewheeling and thus also the locking effect of the compensating chain wheels act in opposite directions on the drive and output link wheels; the power is transmitted via a single-link or multi-link roller chain or belt drive (flat, round, V-belt or toothed belt).