DE1093231B - Automatic switch for reversing lights of motor vehicles - Google Patents

Description

GERMAN

The invention relates to an automatic switch for reversing lights of motor vehicles. It such switches are already known, which are operated by the lever linkage when a reverse gear is switched on. Experience has shown that the installation of such switches is very time-consuming because the Must turn switches installed on the vehicle frame or chassis in a precisely defined position and the actuating element connected to the shift linkage, usually a clamped-on lever, of this type must be set so that the switch is only operated when the reverse gear is engaged, since after the traffic regulations of the switch only when inserting of the reverse gear may be switched on and actuation, for example, by hand, regardless of Reverse gear must be excluded.

It is also known to have a transmission part on the switch for reversing lights of motor vehicles the reverse gear to act. Here, however, the disadvantage must be taken ao that the switch-on process only starts after a few revolutions of the relevant gear shaft.

With the invention, these disadvantages are avoided, and a switch is created that is both simple Wise attached, as well as can only be operated according to regulations. According to the invention this is achieved in that a shaft of the speedometer drive directly or indirectly the switching contacts controls the switch in such a way that it is opened in a known manner when driving forward, when driving backward on the other hand are closed.

The switch can either be built into the speedometer itself, which, however, is a special design of the speedometer is required, or the switch can be used as an intermediate link in series with the Speedometer drive shaft can be used. The latter version can easily be applied to all existing ones Install motor vehicles in a few simple steps, even without subsequent adjustment of the switch is required.

An embodiment of the invention is shown in the drawing and in the following description explained in more detail. It shows

1 shows the switch which can be used as an intermediate element in series with the speedometer drive shaft Schratt and

FIG. 2 shows the interior construction of the switch shown in FIG. 1 along the section line AA in FIG. 1.

The switch is accommodated in a housing 15 with a cover 17. The housing 15 has a Externally threaded connector 16, and the cover 17 has an internally threaded Connector 18. The threaded connector 16 is used for connection to the casing of the flexible speedometer automatic counter

for reversing lights

of motor vehicles

Applicant:

Westfälische Metall Industrie KG
Hueck & Co., Lippstadt

Max Zeuner, Alfeld / Leine,
has been named as the inventor

shaft by means of the usual union nut, while the socket 18, which is provided with an internal thread, can be screwed on on the threaded connector of the speedometer.

In the housing 15 and in the threaded connector 16, an intermediate shaft 12 is mounted, which at one end with an inner square 13 and at the other end with an outer square 14 is provided so that the Intermediate shaft 12 can be easily inserted as an intermediate piece at the end of the flexible speedometer shaft can.

In a corresponding manner, the threaded connector 16 and 18 can also be used for connection to the gearbox provided shaft for driving the speedometer shaft.

An overrunning clutch is attached to the intermediate shaft 12; it consists of one with three spiraldg Part 19 provided with surfaces, an annular body 21 surrounding the part 19 and three balls 20, by means of which the part 19 and the body 21 are coupled in one direction of rotation. The annular body 21 can also be pot-shaped to increase its rigidity, as can be seen from FIG. be trained. It is of course also possible to use the inclined surfaces on the inner circumference of the body 21 and to form the part 19 fastened on the intermediate shaft 12 to be cylindrical on the circumference.

To the outer circumference of the ring or pot-shaped body 21 is the switching disk 23, which is on two opposite points with projections 24 and 25 is provided. In the projection 24 is a contact pin 29 attached, which at its one end via a flexible line 30 with a on the housing 15 insulated attached terminal 27

009 648/267

is bound. The other end of the contact pin 29 comes into contact with the switching disk 23 when it is turned clockwise a contact which is provided on a terminal 28 secured in an insulated manner in the housing is. The movement of the switching disk 23 in the clockwise direction is controlled by an im Housing attached stop 34 limited against which the projection 25 strikes.

In order to achieve a certain opening of the contact when the vehicle is moving forward, there is an advantage 25 a standing under the pressure of the spring 32 displaceable pin 31 is provided, the one in the Housing 15 attached stop 33 touches.

The ring-shaped or cup-shaped body 21 is not rigidly connected to the switching disk 23 on its periphery, but is part of a slip clutch, which in a simple manner from the body 21, one around its outer circumference wrapped, corrugated, resilient ring 22 and the inner wall of the switching disk 23 is formed.

Claims (6)

Patent claims: 1. Automatic switch for reversing lights of motor vehicles, characterized in that a shaft of the speedometer drive directly or indirectly controls the switching contacts of the switch in such a way that they are open in a known manner when driving forward, but are closed when reversing. 2. Switch according to claim 1, characterized in that it is in its own housing (15, 17) and can be used as an intermediate link in series with the speedometer drive shaft. 3. Switch according to claim 1, characterized in that it is built into the speedometer. 4. Switch according to claims 1 and 2, characterized in that it has an intermediate shaft (12) contains those for direct connection to the speedometer drive shaft and the speedometer shaft or the shaft provided on the motor vehicle transmission for connecting the speedometer shaft is formed and with the in-line freewheeling (19, 20, 21) and slip clutches (21, 22, 23) a switching disc (23) is coupled, with a contact attached to this (29) when the overrunning clutch (19, 20, 21) engages another contact (28) which is provided in the housing (15, 17) of the switch, which is also used to support the intermediate shaft (12) and connections (threaded connectors 16 and 18) to the speedometer drive shaft and to the speedometer shaft or to the shaft provided on the motor vehicle transmission for connecting the speedometer shaft having. 5. Switch according to claims 1, 2 and 4, characterized in that the overrunning clutch from a ball clamping lock (19, 19, 20), the inclined surfaces of which on a part (19) of the intermediate shaft (12) or on the ring or cup-shaped bodies (21) are provided. 6. Switch according to claims 1, 2, 4 and 5, characterized in that the slip clutch from the ring-shaped or cup-shaped body (21), one placed around its outer circumference resilient ring (22) and the inner wall of the switching disc (23) is formed. Considered publications:
French Patent Nos. 751 622, 484 844; U.S. Patent No. 1,129,446. 1 sheet of drawings © 009 648/267 11.60