Wiper system for a vehicle that disengages in the event of torque exceeding a threshold

Patent metadata

Field	Value
Publication number	US-10059307-B2
Application number	US-201515318888-A
Country	US
Kind code	B2
Filing date	May 19, 2015
Priority date	Jun 16, 2014
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

The invention relates to a drive mechanism and a wiper system for a vehicle. The mechanism comprises a coupling member (22), a drive head (10) having means (20) for connecting to a wiper blade arm (48) and a slide (32) arranged so as to rotatably engage the member with the head when a value of a torque applied to the head relative to the member is less than a predetermined threshold, and, when this is not the case, to rotatably disengage the member and the head by sliding in a direction perpendicular to a rotational axis of the member.

First claim

The invention claimed is:

1. A drive mechanism for a wiper system for a vehicle, comprising:
a coupling unit;
a drive head comprising means for connection to a wiper-holder arm; and
a slide that engages the unit and the head in rotation when a torque value applied to the head relative to the unit is lower than a predetermined threshold, and disengages them in rotation in the opposite ease by sliding in a direction perpendicular to an axis of rotation of the unit,
wherein the slide has a receptacle for receipt of the coupling unit.

2. The mechanism as claimed in claim 1 , wherein the coupling unit and the slide form a male-female assembly configured to facilitate sliding of the slide by a ramp effect.

3. The mechanism as claimed in claim 1 , wherein the unit comprises a main body configured to facilitate the sliding of the slide by a ramp effect.

4. The mechanism as claimed in claim 1 , wherein the unit is formed by an insert which can be connected to a shaft of a motor.

5. The mechanism as claimed in claim 4 , wherein either one of the unit and the slide has a relief and the other one of the unit and the slide has a cavity for receipt of the relief, the relief and the cavity having faces configured to facilitate the sliding of the slide by means of a ramp effect.

6. The mechanism as claimed in the claim 5 wherein the part which comprises the relief has a flat main face, with the relief extending projecting from this face according to the direction of the axis of rotation.

7. The mechanism as claimed in claim 5 , wherein the insert contains the cavity.

8. The mechanism as claimed in claim 5 , wherein the relief comprises a tooth.

9. A wiper system for a vehicle comprising:
a drive motor;
a wiper-holder arm; and
a drive mechanism connecting the motor and the arm according to claim 1 .

10. The wiper system as claimed in claim 9 , wherein the slide is connected to the wiper-holder arm by a spring which tends to engage the unit and the slide in rotation.

11. The wiper system as claimed in claim 9 , wherein the motor comprises an output shaft which forms the coupling unit.

12. A drive mechanism for a wiper system for a vehicle, comprising:
a coupling unit;
a drive head comprising means for connection to a wiper-holder arm; and
a slide that engages the unit and the head in rotation when a torque value applied to the head relative to the unit is lower than a predetermined threshold, and disengages them in rotation in the opposite ease by sliding in a direction perpendicular to an axis of rotation of the unit,
wherein the unit is formed by an insert which can be connected to a shaft of a motor,
wherein either one of the unit and the slide has a relief and the other one of the unit and the slide has a cavity for receipt of the relief, the relief and the cavity having faces configured to facilitate the sliding of the slide by means of a ramp effect, and
wherein the part which comprises the relief has a flat main face, with the relief extending projecting from this face according to the direction of the axis of rotation.

Assignees

• Valeo Systemes Dessuyage

Inventors

• Auclair Guillaume

Classifications

• B60S1/3459

  the element being a mounting head and a shaft · CPC title

• B60S1/342 Primary

  with means for temporarily uncoupling the wiper arm from the drive · CPC title

• B60S1/08 Primary

  electrically driven {(conjoint control of windscreen wiper motor and liquid supply of windscreen washer B60S1/482; conjoint control of windscreen wiper motor and means for cleaning parts o parts other than windscreens or front windows B60S1/56, B60S1/58, B60S1/606)} · CPC title

• F16D7/048

  with parts moving radially between engagement and disengagement (F16D7/10 takes precedence) · CPC title

• B60S1/3436 Primary

  Mounting heads · CPC title