Drive unit, in particular for a windshield wiper system on a motor vehicle

A drive unit for a windshield wiper system on a motor vehicle comprising:

• a drive motor;
• a gear housing;
• gearing disposed within said housing including an output shaft driven in pendulum fashion, a pinion disposed on said output shaft for rotation therewith;
• and
• a stop member separate from said pinion, said stop member including a ring-shaped portion disposed concentrically with said shaft supportively abutting a portion of said housing and operative to establish rotational limits of travel of the output shaft, wherein at one side of the pinion the output shaft comes out of the gear housing and wherein the ring-shaped portion of the stop member is pushed onto the end of the output shaft protruding at the other end of the pinion.

A drive unit for a windshield wiper system on a motor vehicle comprising:

• a drive motor;
• a gear housing;
• gearing disposed within said housing including an output shaft driven in pendulum fashion, a pinion disposed on said output shaft for rotation therewith;
• and
• a stop member separate from said pinion, said stop member including a ring-shaped portion disposed concentrically with said shaft supportively abutting a portion of said housing and operative to establish rotational limits of travel of the output shaft, wherein the ring-shaped portion of the stop member is disposed on that side of the pinion on which the output shaft comes out of the gear housing.

A drive unit for a windshield wiper system on a motor vehicle comprising:

• a drive motor;
• a gear housing;
• gearing disposed within said housing including an output shaft driven in pendulum fashion, a pinion disposed on said output shaft for rotation therewith;
• and
• a stop member separate from said pinion, said stop member including a ring-shaped portion disposed concentrically with said shaft supportively abutting a portion of said housing and operative to establish rotational limits of travel of the output shaft, wherein the stop member may be swivelled about the axis of the output shaft by the pinion and by means of a stop cooperates with at least one counterstop fixed on the housing, wherein the pinion has a circumferential recess into which recess the stop member engages radially by means of a carrier.

A drive unit for a windshield wiper system on a motor vehicle comprising:

• a drive motor;
• a gear housing;
• gearing disposed within said housing including an output shaft driven in pendulum fashion, a pinion disposed on said output shaft for rotation therewith;
• and
• a stop member separate from said pinion, said stop member including a ring-shaped portion disposed concentrically with said shaft supportively abutting a portion of said housing and operative to establish rotational limits of travel of the output shaft, wherein the stop member may be swivelled about the axis of the output shaft by the pinion and by means of a stop cooperates with at least one counterstop fixed on the housing, wherein the swivelling direction the pinon and the stop member are coupled with each other with substantially no dead travel.

A drive unit for a windshield wiper system on a motor vehicle comprising:

• a drive motor;
• a gear housing;
• gearing disposed within said housing including an output shaft driven in pendulum fashion, a pinion disposed on said output shaft for rotation therewith;
• and
• a stop member separate from said pinion, said stop member including a ring-shaped portion disposed concentrically with said shaft supportively abutting a portion of said housing and operative to establish rotational limits of travel of the output shaft, wherein the stop member may be swivelled about the axis of the output shaft by the pinion and by means of a stop cooperates with at least one counterstop fixed on the housing, wherein in the axial direction of the output shaft the stop of the stop member projects from the ring-shaped portion or from the carrier of the stop member.

A drive unit for a windshield wiper system on a motor vehicle comprising:

• a drive motor;
• a gear housing;
• gearing disposed within said housing including an output shaft driven in pendulum fashion, a pinion disposed on said output shaft for rotation therewith;
• and
• a stop member separate from said pinion, said stop member including a ring-shaped portion disposed concentrically with said shaft supportively abutting a portion of said housing and operative to establish rotational limits of travel of the output shaft, wherein the stop member may be swivelled about the axis of the output shaft by the pinion and by means of a stop cooperates with at least one counterstop fixed on the housing, wherein, looking in the circumferential direction of the pinion, the center of a carrier and the center of the stop of the stop member are set off relative to each other.

A drive unit for a windshield wiper system on a motor vehicle comprising:

• a drive motor;
• a gear housing;
• gearing disposed within said housing including an output shaft driven in pendulum fashion, a pinion disposed on said output shaft for rotation therewith;
• and
• a stop member separate from said pinion, said stop member including a ring-shaped portion disposed concentrically with said shaft supportively abutting a portion of said housing and operative to establish rotational limits of travel of the output shaft, wherein the stop member may be swivelled about the axis of the output shaft by the pinion and by means of a stop cooperates with at least one counterstop fixed on the housing, wherein the stop member to be swivelled by the pinion has the ring-shaped portion which on one side of the pinion is pushed onto the end of the output shaft, has a carrier formed onto the ring-shaped portion, which carrier engages in a recess on the circumference of the pinion, and includes a stop formed onto the carrier, which stop, at the other side of the pinion, co-operates with the at least one counterstop fixed to the housing.

A drive unit for a windshield wiper system on a motor vehicle comprising:

• a drive motor;
• a gear housing;
• gearing disposed within said housing including an output shaft driven in pendulum fashion, a pinion disposed on said output shaft for rotation therewith;
• and
• a stop member separate from said pinion, said stop member including a ring-shaped portion disposed concentrically with said shaft supportively abutting a portion of said housing and operative to establish rotational limits of travel of the output shaft, wherein the stop member may be swivelled about the axis of the output shaft by the pinion and by means of a stop cooperates with at least one counterstop fixed on the housing, wherein the stop member to be swivelled by the pinion has the ring-shaped portion located on that side of the pinion on which the gear housing has at least one counterstop, a carrier formed onto the ring-shaped portion, which carrier extends axially towards the pinion away from the ring-shaped portion, a stop formed onto the ring-shaped portion which from the side of the ring-shaped portion not facing the pinion extends anally away from the former.

A drive unit for a windshield wiper system on a motor vehicle comprising:

• a drive motor;
• a gear housing;
• gearing disposed within said housing including an output shaft driven in pendulum fashion, a pinion disposed on said output shaft for rotation therewith;
• and
• a stop member separate from said pinion, said stop member including a ring-shaped portion disposed concentrically with said shaft supportively abutting a portion of said housing and operative to establish rotational limits of travel of the output shaft, wherein the stop member comprises a first stop having at least one elastically flexible counterstop fixed to the housing and a second stop co-operating with at least one rigid counterstop fixed to the housing and that the spacing between first stop and flexible counterstop is smaller than that between the second stop and the rigid counterstop.

A drive unit for a windshield wiper system on a motor vehicle comprising:

• a drive motor;
• a gear housing;
• gearing disposed within said housing including an output shaft driven in pendulum fashion, a pinion disposed on said output shaft for rotation therewith;
• and
• a stop member separate from said pinion, said stop member including a ring-shaped portion disposed concentrically with said shaft supportively abutting a portion of said housing and operative to establish rotational limits of travel of the output shaft, wherein the stop member has a firm seat in the gear housing and that the ring-shaped portion of the stop member is made in one piece at least with one arm, which is elastically flexible and forms a counterstop fixed to the housing for a stop of the pinion.