Electromotive adjusting device

Claim 2

An adjusting device comprising a reversible driving motor, a cooperative arrangement comprising a spindle and a nut to constitute driving elements, said arrangement driven by said motor at least directly, whereby one of said driving elements performs a pushing and a pulling movement, respectively, a nut-housing receiving said nut, connection elements, having poor friction and being nonresilient, transferring axial forces for said pushing and pulling movement, respectively, from said nut driven by one of said motor and said spindle to said nut-housing, and said nut-housing being rigidly connected with said driving motor and with a push-pull tube, respectively.

Claim 3

The adjusting device, as set forth in claim 1, wherein said connecting elements between said nut and said nut-housing comprise a plurality of ball bearings.

Claim 4

The adjusting device, as set forth in claim 1, which includes a bolt disposed in said nut, and transmitting a radial force, caused by the friction between said spindle and said nut, to said nut-housing, and said nut-housing having a recess receiving said bolt, and permitting a limited rotary movement of said nut.

Claim 5

An adjusting device comprising a reversible driving motor, a cooperative arrangement comprising a spindle and a nut to constitute driving elements, said arrangement driven by said motor at least directly, whereby one of said driving elements performs a pushing and a pulling movement, respectively, a nut-housing receiving said nut, connection elements, having poor friction and being non-resilient, transferring axial forces for said pushing and pulling movement, respectively, from said nut driven by one of said motor and said spindle to said nut-housing, said nut-housing being rigidly connected with said driving motor and with a push-pull tube, respectively, a bolt being disposed in said nut, and transmitting a radial force, caused by the friction between said spindle and said nut, to said nut-housing, said nut-housing having a recess receiving said bolt, and permitting a limited rotary movement of said nut, and said bolt having a resilient body.

Claim 6

An adjusting device comprising a reversible driving motor, a cooperative arrangement comprising a spindle and a nut to constitute driving elements, said arrangement driven by said motor at least directly, whereby one of said driving elements performs a pushing and a pulling movement, respectively, a nut-housing receiving said nut, connection elements, having poor friction and being non-resilient, transferring axial forces for said pushing and pulling movement, respectively, from said nut driven by one of said motor and said spindle to said nut-housing, said nut-housing being rigidly connected with said driving motor and with a push-pull tube, respectively, a bolt being disposed in said nut, and transmitting a radial force, caused by the friction between said spindle and said nut, to said nut-housing, said nut-housing having a recess receiving said bolt, and permitting a limited rotary movement of said nut, and said bolt having a resilient body.

Claim 7

An adjusting device comprising a reversible driving motor, a cooperative arrangement comprising a spindle and a nut to constitute driving elements, said arrangement driven by said motor at least directly, whereby one of said driving elements performs a pushing and a pulling movement, respectively, a nut-housing receiving said nut, connection elements, having poor friction and being non-resilient, transferring axial forces for said pushing and pulling movement, respectively, from said nut driven by one of said motor and said spindle to said nut-housing, said nut-housing being rigidly connected with said driving motor and with a push-pull tube, respectively, said connecting elements between said nut and said nut-housing comprising a plurality of ball bearings, a pretension cup spring being disposed on both sides between said nut-housing, receiving said nut and said ball bearings, supporting said nut, and the pretension of said cup spring being determined such, that the forces exerted by said adjusting device cause no eventual resilient effect.

Claim 8

An adjusting device comprising a reversible driving motor, a cooperative arrangement comprising a spindle and a nut to constitute driving elements, said arrangement driven by said motor at least directly, whereby one of said driving elements performs a pushing and a pulling movement, respectively, a nut-housing receiving said nut, connection elements, having poor friction and being non-resilient, transferring axial forces for said pushing and pulling movement, respectively, from said nut driven by one of said motor and said spindle to said nut-housing, said nut-housing being rigidly connected with said driving motor and with a push-pull tube, respectively, said connecting elements between said nut and said nut-housing comprising a plurality of ball bearings, a pretension cup spring being disposed on both sides between said nut-housing, receiving said nut and said ball bearings, supporting said nut, and the pretension of said cup spring being determined such, that the forces exerted by said adjusting device cause no eventual resilient effect.

Claim 9

The adjusting device, as set forth in claim 1, wherein said nut is structurally joined with its transmission elementS in a housing, and constitutes an easily exchangeable independent structural unit.

Claim 10

The adjusting device as set forth in claim 6, wherein said nut-housing being formed such that it selectively can be used for reciprocating movement of one of said spindle and said nut.

Claim 11

The adjusting device as set forth in claim 1, wherein said connecting element between said nut and said nut-housing comprises a ball bearing disposed on the abutment of said nut.