DE825812C - Switching device for the chain switching device on the sprockets of the pedal crank of bicycles or the like - Google Patents

Description

Switching device for switching the chain on the chain wheels of the Pedal crank of bicycles o. The like. The known on the Tre.bkurbelrad of bicycles o..dgl.arbeitenden gearshifts have parts for switching back and forth, -deren Machining and, fitting., Is quite intricate, and fastening devices, which numerous clamps or very, precise welding processes for manufacture or Require connection points.

In order to remedy these inconveniences, a switching device for -the chain switching on the sprockets of the crank suggested which can be fastened quickly, while at the same time the lateral adjustment 'none requires a difficult mechanism to assemble and operate.

The drawings show various exemplary embodiments of the invention Switching device. Fig. Z shows a speed changeover device in side view with chain switching on the crank; the stTächpu, nested lines Figure 3 shows the two coupled sprockets and the chain engaged; Fig. A is a front view corresponding to Fig. T; Fig.3 shows schematically the switching of the fork of the speed switching device to the one or the other sprocket of the crank; .

Fig.q. shows in a cut plan the joint and the fastening the speed switching device by a clamp on your seat post the bicycle frame; Fig. S shows the joint and in a sectioned plan fastening of the speed instinct 1ial subdivision by means of one rigidly connected to the seat post. Foot part; Fig.6 is a side view the speed, time-round device with an adjustable stop; Fig. J shows a view from the front corresponding to Fig. 6, on the large Sprocket of the crank set fork dier speed control switch message; : \ 11b. S shows in a view corresponding to Fig. 6 from the front, the small I # ', etteilra, d' the "1'i-ctl; urllel set fork of the speed switch device.

This Geschwili-digl; ci tsuinschalteinrichtung through chain switching Eil the sprockets of the crank has a swiveling aclise 5, which at a suitable point on the tube t of the bicycle: tdralinieeil (Fig. i) is attached, which at the same time the Trettl; urbelgeli »itise 2 with the two coupled chain wheels 3 and 4. wears.

1 \ 'i0 in. \ 1) h.4 and @ shown, the Schivenkaclise can be represented by a Clamp 6, or, by means of an all-welded or “hard-wired” foot part 7 be attached. It is self-evident that you should never use any other fastening method Useii 'can, such as. B, the direct weld-on of axis 5, all that Pipe i.

On the pivot axis 5, a part S pivots with a shift lever 9 is rigidly connected at one point of the Lälige dess.elheii. Furthermore, it is elastic Brenisvorriclitutrg provided, which (gelliä (. @ Dep. 4 and 5) by a wöllltc # 1. lltrrl0gsc1ieille lo of known design is formed, or by a spring of known Design type.

A wing nut i i is on the threaded t-end of the Axis 5 screwed to a certain friction pressure to ci-zcugeii; being the pressure at will, is adjustable.

The Sc'liN @ enl; llebel 9 has an operating handle at one end 12 and carries the liiliscllaltvorriclltulrg at the other end.

The utnsclialtvori-iclitung is formed by a <', allele 13, where the regulation of their lateral position, through adjustment, on the other hand End of lever 9- and blocking all place tilld place by a screw 1 4 (A111. I u. (L 2). It goes without saying that depending on the Design the fork from one piece of finite lever 9 and make it finite any other suitable means for lateral regulation or else on the lever 9 any other profile to switch the chain full one Chain edge can attach to the other.

Fig. 3 shows the two positions of the lever 9, depending on the situation. if she Device on one or the other: tlidere of the sprockets 3 and 4 of the crank is set.

The deflection of the rocking movement of the lever scans through a stop limited Nverden, which is fixed or by a screw or z. ß. by means of an M '' angle adjustment can be regulated.

In Fig. 2 is a stop system with a housing 15 with the visible Fixed connection 211 16 and 17 shown.

According to Fig. 6, 7 and S, the shell level I 9 hits immediately at i8 against the tube i of the frame, or against any other Festpuli.kt. the Regulation ordered in it, after the stop of the Ilebels, the fork 13 on the I # ', ettelirad-l (Fig. 7). When the lever 9 is pivoted (Fig. S), the fork 1 3 set to d-as 1 #> ettenra-d 3 by screwing in the stop screw 22 or screw it out, which is provided with a counter nut i9. is ilna z. B: at 2o hits a fixed point on the pipe i.

Since the fixed points iS and 2o are unchangeable, it is clear that this is the case each actuation of the switching lever .die Galxl 13 in the desired manner on the Sprockets 3 and 4 are set. If inan on the other hand, this setup for an arrangement If the sprockets are completely wider apart, it is sufficient to use the scliraul> e 22 i »deal gciviilianish sense to disguise, uni gell wil-spawn alischloader @ 'Erstcllungdcr fork 13 to enlarge. .

Tii \ llll. ) sic # lit Ina »gell c110 Srliraulic ?? supporting approach 21. 1) 1e reversed device can also be implemented, which means, (k11, feStc. \ »@ 01llag allf c101- page 20 and the adjustable stop on page 18 lwfin.det, which is practically the same l r @ elmis delivers.

Claims (7)

PATEN'TAVS1'Rt'CHL: i. Switching device for the KOttenumschaltumg on the sprockets of the crank should .Vabrrüderit ei. <1g1., Gck @ ll »zeiclitict by means of a switch lever (9), the length of which is finite in the middle area, finite eiii <#tli Allsatz (8) is rigidly bound. which can be swiveled on a Schwenil axis (5) is stored, which a seat post (1) is lwfestigt. being the swing, 1cmovement of the shift lever a ßrensumg by the adjustable friction pressure -eine, .- elastic U: n washer (i o) is subject to ttnd -% \ olxi the gear lever at one end one actuation = button (12) and on the other form a fork (13) for switching the chain on one or the other of the coupled sprockets (3, 4) different Diameter of the crank and the switching deflection is limited by stops is. 2. Device according to claim i-, characterized in that @diie pivot axis (5) all of the seat post tube is attached by a clamp (6). 3. Establishment according to claim i, characterized in that the pivot axis (5) on the saddle support tube is attached by a welded or hard soldered foot part (7). 4. Establishment according to claim i, characterized in that the adjustment of the frictional pressure the elastic washer (io) by tightening or loosening A wing nut (i f) is made "which on the threaded The end of the pivot axis (5.) is screwed on, and - the elastic on the retaining bracket (8) Washer (io) compresses more or less, the approach of this shift lever himself on. the tabs of the clamp carrying the pivot axis or of the foot part strikes. 5. Device according to claim i, characterized in that the to fold the chain used switching fork (13) with the shift lever (9) -one piece forms. 6. Device according to claim i, characterized in that the switching fork (13) is placed on the bent end of the shift lever (9), the lateral The position of this fork in relation to the shift lever is adjustable and by means of a clamping screw (14) can be fixed. 7. Device according to claim i, characterized in that that the lever travel is limited by two fixed stops (16, 17), which are applied to one on the pivot axis. Housing (15) are formed. B. Device according to claim i, characterized in that the deflection of the shift lever for adjusting the switching fork (13) outwards through the stop on the top Part of the shift lever is limited against the seat post tube! (Fig. 7), while the stop of the switching fork inwards by hitting a nut and lock nut provided adjusting screw (22, Fig. 8), which in a neck (21) is screwed on the lower part of the pivot lever, against the seat post is limited.