DE1952541A1 - Drive device, in particular for windshield wipers, window panes and other devices on motor vehicles - Google Patents

Description

R. 9633 Sa / Hf
10.10.1969

Attachment to
Additional patent--

ROBE RT EO SCH (WiEE, 7 Stuttgart ¥, Breitscheidstr.

Drive device, especially for Scb.eii3e11v1isch.er,

Window panes and other devices on motor vehicles -_

Addendum to patent ... (patent application P 19 01 522.6)

The invention relates to a drive device, in particular for windshield wipers, pen wipers and other equipment on motor vehicles, with a compression-resistant rope that is lowered and raised by a motor from at least one pulley this can be wound up, with one end of the rope on

109817/1075

SAD ORIGINAL

, -. "' ² - ■■ -: ■ 195? 541

Robert Bosch GmbH _. '_ R. 9635 Sa / Hf

Stuttgart

the device to be operated acts, the other end of the Rope held on the pulley and at least one the ■ Power supply to the motor controlling switch is influenced by switching elements attached to the pulley, according to patent ... (Patent application P 19 01 522.6). ■;

In the arrangement according to the main patent, two pins are provided as switching elements. of the pulley are attached to the same pitch circle. The pulley can therefore each. _: w \ Lls only make about one turn until the switch is actuated and the movement of the pulley is then reversed. Accordingly, the required length of the rope to be unwound from the rope pulley must be achieved by a correspondingly large rope pulley diameter. However, this can lead to difficulties if the space required - the pulley - too. grows big. ^! ■

The invention is based on the object with a pulley also to master an actuation path for facilities., which is larger than the circumference of the pulley.

In a drive device of the type mentioned above this is achieved in that a switching element is attached to a stationary one Part at least approximately radially to the axis of rotation of the pulley is movably mounted and engages in spiral cam control means provided laterally on the rope pulley, which the switching element when turning the pulley anii in relation Crexhen to the covered rotary path, force radial sliding path.

The ^J switching points in time can, as a result of the course of the curve control means, be offset by wext ^ menf ¹ AIs ^ eO ⁰ , 'if necessary even by several spiral dimensions voaeiiamtd'eir.

... if;

- 5 1098Ί7 / 1075

³ ■ - "1957541

Robert Bosch GMBH . . E. 9633 Sa / Hf

Stuttgart

The actuation path is therefore completely independent of the diameter the pulley, so that the tree needs for the Holle "at Structure of the drive device can be of minor importance.

A particularly advantageous embodiment results when, in a further embodiment of the invention, the switching movement occurs of the switching element is composed of one of the curve control means the pulley creates radial movement and one adjoining it by a stop shoulder that starts up with tangential movement caused by the pulley, which triggers the actual switching process in the switch. Through this it is achieved that the triggering the actual switching process Movement of the switching element takes place much faster than its radial movement caused by the cam control means, so that the prescribed switching times are exactly adhered to v / can ground.

The invention is explained in more detail below with reference to an embodiment shown in the drawing. Show it:

ELg. 1 a drive device for a windshield wiper, with open, partly im. Section shown housing, and

Pig. 2 the pulley of the device according to FIG. 1 in section with the holder for the power supply of the motor.

The drive device 1 has a mounted in a housing 2 Pulley 3, which has a motor ^ alternately in the one and the other direction of rotation is driven. One end of a pressure-resistant rope 5 is attached to the pulley 3, which

attached to housing 2
sxch extends through exnen / Teleskopstafo ^ j and its

109817/1075 - 4 -

ORtGJNAL

-ν-. 1957541

Robert Bosch GmbH E. 9633 Sa / Hf

Stuttgart.

the other end is connected to the most extensible telescopic rod element to which a windshield wiper 7 is attached. The pulley 3 has a spiral groove 9.V on an end face 8 which is provided with two pins 10 and 11 serving as stop shoulders. The pins 10 and 11 are adjustable in the groove 9 and can be ^{fastened at any point dec 1} groove. In relation to the development of the spiral groove 9, the pins 10 and 11 are arranged at a distance from one another 11 located area of the groove 9> which forms a switching path 12, protrudes a pin 13 which is connected via a leaf spring 14 to an actuating element 15 of a switch 16 which controls the power supply to the motor 4.

In operation, the pressure-resistant rope 5 is alternately on the rope pulley 3 wound up and down again and the windshield wiper 7 swept back and forth. From the required stroke of the Windshield wiper 7 is calculated the pulley diameter and the number of revolutions that the pulley between the movement reversal points must run. The number of revolutions can be precisely adjusted with the help of pins 10 and 11, because they can be grounded in the groove 9 in a correspondingly offset manner. The number of spiral turns must therefore match the number required At least equal to the number of revolutions of the roller. When the pulley 3 rotates, the pin 13 slides in the than Switching path 12 limited by the two pins 10 and 11 piece of the groove 9 · With increasing rotation, the pulley 3 moves the pin 13 with respect to the pulley in the radial direction. This is made possible by the leaf spring 14, Via which it is connected to the actuating element 15 of the switch 16 is. When the pin 13 strikes one of the pins 10 or 11, the direction of rotation of the is via the switch 16 Motor 4 reversed and then the pulley 3 while in the moves in the other direction of rotation until the other pin hits the pin 13 actuated.

10 9817/1075 " ⁵ "

ORIGINAL "■. -

195-541

Robert Bosch GmbH R. 9633 Sa / Hf

Stuttgart

The switch 16 could also be designed as a limit switch be, so that when you start one of the pins 10 or 11 to the Pin 13 switches off the drive device 1 and only starts again with a new switch-on pulse and the windshield wiper moved back and forth once.

It is possible with the drive device 1 according to the invention to master even particularly large operating distances, since the 'rope 5 in several turns and if necessary also wound on the jacket 17 of the pulley 3 in layers one above the other can be. If the stroke of the wiper is a multiple of the circumference of the roller 3, the spiral groove 9 having at least a number of turns corresponding to this multiple:

1098 17/1075

ämiümo üL · , BAD ORlGlNM.

Claims (8)

.- ■■■ * - 1957541 Rotiert Bosch GmbH L R. 9633 Sa / Hf Stuttgart. . , .- 10.10.1969 claims 1. ^ Drive device, in particular for disk shears, Window panes and other devices on motor vehicles, with a rigid rope that is driven by a motor from at least one rope pulley and put it back on again. W can be wound, with one end of the rope acting on the device to be operated, the other end of the rope held on the pulley and at least one switch controlling the power supply to the motor being influenced by switching members moved by the pulley, according to the patent. . b spiral cam control means (9) engages, the the switching element when turning the pulley a proportion .- .. ·,. "■ small, radial displacement path for the covered rotary path imposition. 2. Apparatus according to claim 1, characterized in that the Switching element (13) as parallel to the axis of rotation of the pulley (3) arranged pin is formed, which in a spiral groove (9) in one end face (8) of the The rope pulley (3) engages. .- ■■ .- ■■ ■■ .. '■'; - .2 - 1098 17/10 7.5 - 2-- ^; ■ 1957541 Robert Bosch GmbH .T "■" E. 9633 Sa / Hf Stuttgart ' 3. Apparatus according to claim 1 or 2, characterized in that the switching movement of the switching element (IJ) is composed from one of the cam control centers in the pulley (3) forced radial movement and a subsequent, from a rotating stop shoulder (10 "or 11) of the rope pulley caused tangential movement, which triggers the actual switching process in the switch (16). .- ■ -. ". 4. Apparatus according to claim 3, characterized in that the switch (16) is one mounted pivotably about an at least approximately parallel to the axis of rotation of the rope pulley (3) Actuating lever (15) on which the Sehaltgerät (13) is articulated radially displaceable in the pivoting direction but rigid. 5 · Device according to claim 4-, characterized in that the Switching element (13) at one end of a circumferential direction the control cam extending leaf spring (14-) is seated, the other end on the swiveling operating lever (15) of the switch (16) is attached. 6. Device according to one of the preceding claims, characterized characterized in that the stop shoulder running around the pulley (3) (10 or 11) is arranged in the immediate vicinity of one end of the cam control means (9). 109817/1075 -3 - 8AD ORIGINAL _> _ 1957541 Robert Bosch GmbH R. 9633 Sa / Hf Stuttgart 7. Device according to claim 2 and 6, characterized in that that the stop shoulder running around the pulley (3) (10 or 11) through one into the spiral Groove (9) inserted pin is formed 8. Apparatus according to claim 7? characterized in that the pin (10 or 11) in the hat (9) is adjustable and can be fixed. ■ 1,098 177 10 7.5 ßAD ORIGlNAl.