CLICK-STOP DEVICE

MECANISME D'ENCLIQUETAGE

English Abstract

ABSTRACT OF THE DISCLOSURE
A click-stop device, in particular for a central
shaft or a gearshift lever of a gear-change transmission
with a stopping body and a spring-loaded rolling-contact
body which is characterised in that a contoured stopping
block is provided for effecting movements along at least
two lines of movement and in that a stopping ball is
provided as rolling-contact body.

Claims

The embodiments of the invention in which an exclusive
property or privilege is claimed are defined as follows:-
1. Detent device, in particular for a central
shaft or a gear-shift lever of a gear-change trans-
mission, comprising a detent element and a spring-
loaded rolling element, characterized in that a con-
toured detent block which is co-operable with said
rolling element and which is provided for effecting
motions along at least two plans of movement, and in
that said rolling element comprises a detent ball.
2, Detent device according to claim 1,
characterized in that the contoured detent block com-
prises detent humps which are aligned in two prefer-
ential directions.
3. Detent device according to claim 2,
characterized in that the contoured detent block is
attached to the detent element which is mounted on
the central shaft of a gear-change transmission.
4, Detent device according to claims 1, 2 or
3, characterized in that balls are provided as bearings
for the detent ball.

Description

J~
The invention refers to a click-stop device, in particular for a central
shaft or a gearshift lever of a gear-change transmission, comprising a
stopping body and spring-loaded rolling~contact body.
Vario~s types of sw;tching equipment require their switching means to be
movable in more than one line of movement and to be stopped~ Thus it is
necessary to provide stopping means on a central shaft or a gearshift lever
of a gear-change transmission not only in the line of the selecting
movement, but also in the line of the gear-changing movementO Already
known stopping devices provide a means for stopping only in one line of
movement, so that it would really be necessary to have -two stopping devices
on a central shnft or a gearshift lever of a gear-change transmission. The
friction force to be absorbed by the gearshift lever would correspond to the
sum of the friction forces occurring in both separate stopping devices and
would thereFore be considerable.
The invention is based on the requirement to create u stopping device which,
using only a few components, provides a simple means of obtaining stopping
along two Lines of movement whilst keeping the friction force created 1hereby
to a minimum.
The xequirement is met by the features indicated in the characterising part
of claim l.
Compared with the prior art the invention has the advantage that only one
s-topping device is necessary for ensuring stopping along two lines of
movement, e.g. in connection with a gear-change transmission for gear
selection and gear change. In this way good efficiency can be achieved
and the component requirement can be kept to a minimum~ Vue to the seall
number of components there is less wear, and the manufacturing cost can be
reduced. The stopping device can be used on all gear-change transmissions

and is suited in particular for small transmissions, because it requires
only a small amount of space, The stopping device according to the
invention can also be used for other switching equipment such as electrical
switches and hydraulic or pneumutic valves where the switching means have
several lines of movement.
Further advantageous developments are revealed in the sub-claims~
The invention will now be explained by way of example with reference tothe drawing of which
fig. 1 is a perspective view oF a click-stop device according to -the
inventiGn with a contouxed stopping block,
Fig. 2 is a partial view of the stopping body with a stopping contour
for selection, and with a stopping ball, partially in section,
fig. 3 is a section through the stopping body along a line III-III in
fig~ 2 with a stopping contour for gear-changing and the stopping ball.
A stoppillg body 1 and a s-triker 3 are mounted on a cen-tral shaft 2 (fig. 1)~ ¦
The central shaft 2 is running in bearings 4, 5 and is rotatable and axially
movable, as already known. The strikex 3 is provided for e~g. the operation
of guide bar for bringing in the various gears in a gear-change trans~issionO
A stopping body 1 is provided with humps 6, 7, an indentation 8 and
surfaces 10, 11. Together they form a contoured stopping blockO The humps 6, 7
and -the indentation 8 form a stopping contour ex-tending transversely to the
axial direction of the central shaft 2 and providing the stops for the
gear~change operation, In relation to the surfaces 10, 11 the humps 6, 7
are of uniform height over their entire length and nre oF a certain height
in relation to the surfaces 10, 11, The humps 6, 7 follow the line of con-tour

~ '7
-- 4 --
of the surfaces 10, 11 which form the s-topping contour for selection.
The contour of surface 10 (fig. 1) comprises points 16, 17, which represent
indentations and adjacent to which are elevations. Such a raised seCtiQn
is provided at point 18. The contour of surface 11 also comprises indenta-tions
at the points 19, 20, with elevations adjacent to them. Such un elevation is
provided at the point 21. The contours of the surfaces 10 and 11 ore
identical or at least si~ilar to each otherO In figO ~ the stopping contour
for selection is reveuledO ~he balls 13 provide a particularly low-friction
bearing support for the stopping ball ~O A bearing part 12 is pressed aguinst
the balls 13 by means of a pressure spring and thus against the stopping
ball 9, whereby the latter is kept in engagement with the stopping contour~
Instead of using balls 13 -the stopping ball 9 may be supported directly by the
bearing part 12 preferably made from synthetic material (not shown on the
drawing).
Fig. 3 shows the stopping contour for the gear-change operation.
The stoppin0 contour for selection (fig. 1, 2) may be shaped in such a way
as to provide the driver with a feel of the forces necessary so that he
receives information via the selected lane on the force to be applied
during selection.
The stopping contour for the gear-change operation (figO 1, 33 may be shuped
in such a way that the stopping ball (g), whilst rolling off -the downward
sloping flanks 22, 23, assists in the gear-change operation thus makiny it
easier.