DE8533436U1 - Chain guards - Google Patents

Description

Paul Steinmann GmbH

4830 Gütersloh 1, Kahlertstrasse 209

Chain guard 0

The present innovation relates to a plastic, two-part chain guard for two-wheelers, consisting of a bottom bracket recess that runs at least in sections in the shape of a circular arc provided and fixable on the bottom bracket of a two-wheeler

And an inner shell so that a form-fitting connectable ~ 'outer Kettenabdeckschale.

Chain guards of the generic type are known per se.

In the known constructions, the inner shell is on screwed to a bracket that can be fixed to the bottom bracket. The chain cover shell is snapped onto the inner shell » which is provided for this purpose with several holding sticks to which the corresponding recesses in the chain cover shell are assigned *

The fact that the inner shell is attached to an additional, am Bottom bracket to be fixed holding part is attached, leads both at additional material and at additional Montsfie costs.

Steinmann - 2 -

The present innovation is based on the task of designing a chain guard of the generic type in such a way that that this can be mounted on a two-wheeled vehicle in the simplest possible way.

According to the innovation, this task is solved in that

the inner shell in the vicinity of its bottom bracket recess with at least one in the bottom bracket recess ^ opening and a clamping screw receiving hole

is provided.

This constructive measure fixes the inner shell of the chain guard in the bottom bracket area of a two-wheeler, since after the inner shell has been pushed onto the bottom bracket, all that remains is the clamping screw or the clamping screws are tightened need to set the inner shell. After the chain cover shell has been snapped open, it is opened in a known manner set in their rear end on the bicycle frame, so that a proper and twist-proof definition of the entire chain guard is effected.

Further features of the innovation are the subject of subclaims.

An embodiment of the innovation is shown in the accompanying drawings and is described in more detail below.

Show it:

1 shows a view of an inner shell of a two-part chain guard with a dash-dotted line Chain cover shell,

FIG. 2 shows a section along the line II-II in FIG. 1

Steinmann - 3 -

with the omission of a clamping screw shown in FIG. 1.

The chain guard shown in Figures 1 and 2 and provided overall with the reference numeral 10 consists in in a manner known per se from an inner shell 11 as well

an outer chain cover shell 12, which is indicated in Figures 1 and 2 by dash-dotted lines C is.

Inner shell 11 and chain cover shell 12 are made of plastic in a known manner.

The inner shell 11 is provided in the area of its outer edge 13 with retaining cams 14, which is a chain cover shell 12 provided with corresponding recesses so that the chain cover shell 12 on the retaining cams 14 of the inner shell 11 can be snapped on.

\ J The inner shell 14 is provided with an at least partially λ arcuately extending Tretlaqerausnehmung 15 so that these inner shell 11 to a hinted shown in Figure 1 the bottom bracket 16 up a two-wheeler

2Q can be pushed. \

As FIGS. 1 and 2 make clear, the inner shell 11 has in the vicinity of the bottom bracket recess 15 a bore 17 which opens into the bottom bracket recess 15. In this bore 17 is what Figure 1 clearly makes a clamping screw 18 screwed. This clamping screw 18 can be used to fix the inner shell 11 on the bottom bracket 16 of a two-wheeled vehicle can be clamped onto this bottom bracket 16, thereby fixing the inner shell 11 compared to the bottom bracket 16 is reached.

Steinmann - 4 -

Appropriately, the bore 17 is opposite to the circular arc-shaped Section 19 of the bottom bracket recess 15 arranged eccentrically, so that during assembly of the inner shell 11 it is achieved that this with its circular arc

I 5 shaped section 19 fixed to the bottom bracket 16 of a two «

■ i rades is attracted.

S The clamping screw 18 is advantageously with a

! * self-tapping external thread and the hole

(\ 17 accordingly has a smaller inner diameter

t 10 than the outside diameter of the clamping screw 18.

ξ Deviating from the illustrated embodiment, it is

I, however, also conceivable, the bore 17 with an internal thread

I can also provide a threaded bushing in

ι the inner part 11 be cast.

Hj 15 It is also possible to provide several such bores 17 with I clamping screws 18, but it has been shown that

■■ In general, the use of a clamping screw 18 for

secure fixing of the inner shell 11 is sufficient.

Claims (3)

Steinmann - 1 - claims for protection 1. Made of plastic, two-part chain guard (~ \ for two-wheelers, consisting of an inner shell which is provided with an at least partially circular arc-shaped pedal recess and can be fixed to the pedal bearing of a two-wheeler, and an outer chain cover shell that can be positively connected to it, characterized in that the inner shell (11) is provided in the vicinity of its bottom bracket recess (15) with at least one hole (17) opening into the bottom bracket recess (15) and receiving a clamping screw (18). ζ ~ \ 2. Chain guard according to claim 1, characterized in that the bore (17) is arranged eccentrically opposite the circular arc-shaped section (19) of the bottom bracket recess (15). 3. chain guard according to claim 1 or 2, characterized in that the inner diameter of the bore (17) is smaller than the outer diameter of the clamping screw (18) and that the clamping screw (18) ir.it a self-tapping External thread is fitted.