Switching device for a motor vehicle transmission

Patent metadata

Field	Value
Publication number	US-10302148-B2
Application number	US-201715593127-A
Country	US
Kind code	B2
Filing date	May 11, 2017
Priority date	May 11, 2016
Publication date	May 28, 2019
Grant date	May 28, 2019

Abstract

A shifting device for a motor vehicle transmission has a first coupling component, a second coupling component rotatable about a transmission axis (A), an inner friction ring which has a conical surface on a radially outer face, an outer friction ring which has a conical surface on a radially inner face, and an intermediate friction ring having a C-shaped ring cross section, including a friction cone connected to the second coupling component for joint rotation with and for axial displacement with respect to the second coupling component, while the inner friction ring and the outer friction ring are connected to the first coupling component for joint rotation with and for axial displacement with respect to the first coupling component. The friction cone extends between the conical surfaces of the inner friction ring and outer friction ring.

First claim

The invention claimed is:

1. A shifting device for a motor vehicle transmission, comprising:
a first coupling component,
a second coupling component rotatable about a transmission axis (A),
an inner friction ring which has a conical surface on a radially outer face and is connected to the first coupling component for joint rotation with and for axial displacement with respect to the first coupling component,
an outer friction ring which has a conical surface on a radial inner face and is connected to the first coupling component for joint rotation with and for axial displacement with respect to the first coupling component, and
an intermediate friction ring which comprises a friction cone and is connected to the second coupling component for joint rotation with and for axial displacement with respect to the second coupling component,
the friction cone extending between the conical surface of the inner friction ring and the conical surface of the outer friction ring,
the first coupling component and the second coupling component being decoupled in the rotation direction in an axial starting position of the outer friction ring and being coupled in a frictional fit in the rotation direction in an axial frictional fit position of the outer friction ring,
wherein the cross-section of the intermediate friction ring is generally C-shaped extending in the circumferential direction along a complete periphery of the intermediate friction ring, comprising a radially outer linear cone limb which forms the friction cone and comprises two substantially parallel conical friction surfaces, and comprising a radially inner linear axial limb extending parallel to the transmission axis which (1) is integrally connected to the cone limb by a radial web, and which (2) directly contacts the second coupling component.

2. The shifting device according to claim 1 , wherein the first coupling component is a transmission housing or an actuation sleeve rotationally engaged with the transmission housing which is rotatable.

3. The shifting device according to claim 1 , wherein the first coupling component is a transmission shaft or an actuation sleeve connected to the transmission shaft for joint rotation with and for axial displacement with respect to the transmission shaft.

4. The shifting device according to claim 1 , wherein at least one of the inner friction ring and the outer friction ring is a reshaped sheet metal part.

5. The shifting device according to claim 1 , wherein the intermediate friction ring is a sheet metal part reshaped to obtain the C-shape in cross section.

6. The shifting device according to claim 1 , wherein the axial limb of the intermediate friction ring comprises an internal toothing on the radial inner side, which extends over the entire axial length of the axial limb.

7. The shifting device according to claim 6 , wherein the second coupling component is a shifting shaft which has an external toothing engaged with the internal toothing of the intermediate friction ring.

8. The shifting device according to claim 1 , wherein a spring element is provided which urges the inner friction ring and the outer friction ring axially into a ventilation position.

9. The shifting device according to claim 1 , wherein the inner friction ring, the outer friction ring and the intermediate friction ring form a first friction ring set, and a second friction ring set is provided which comprises a further inner friction ring, a further outer friction ring and a further intermediate friction ring.

10. The shifting device according to claim 9 , wherein the first friction ring set and the second friction ring set are arranged mirror-symmetrically, and the transmission axis (A) extends perpendicular to a plane of symmetry (E) of the friction ring sets.

11. The shifting device according to claim 9 , wherein the inner friction ring and the further inner friction ring are each configured L-shaped in cross section and each comprise a cone limb and a radial limb extending radially outwards from the cone limb.

12. A shifting device for a motor vehicle transmission comprising:
a first coupling component,
a second coupling component rotatable about a transmission axis (A),
an inner friction ring which has a conical surface on a radially outer face and is connected to the first coupling component for joint rotation with and for axial displacement with respect to the first coupling component,
an outer friction ring which has a conical surface on a radial inner face and is connected to the first coupling component for joint rotation with and for axial displacement with respect to the first coupling component, and
an intermediate friction ring which comprises a friction cone and is connected to the second coupling component for joint rotation with and for axial displacement with respect to the second coupling component,
the friction cone extending between the conical surface of the inner friction ring and the conical surface of the outer friction ring,
the first coupling component and the second coupling component being decoupled in the rotation direction in an axial starting position of the outer friction ring and being coupled in a frictional fit in the rotation direction in an axial frictional fit position of the outer friction ring,
wherein the intermediate friction ring has a C-shaped ring cross section extending peripherally in the circumferential direction, comprising a radially outer linear cone limb which forms the friction cone and comprises two substantially parallel conical friction surfaces, and comprising a radially inner linear axial limb which is integrally connected to the cone limb by a radial web,
wherein the inner friction ring, the outer friction ring and the intermediate friction ring form a first friction ring set, and a second friction ring set is provided which comprises a further inner friction ring, a further outer friction ring and a further intermediate friction ring,
wherein the inner friction ring and the further inner friction ring are each configured L-shaped in cross section and each comprise a cone limb and a radial limb extending radially outwards from the cone limb, and, wherein the radial limbs are axially braced against one another, in such a way that the inner friction ring and the further inner friction ring form an inner lamella T-shaped in cross section.

13. A shifting device for a motor vehicle transmission comprising:
a first coupling component,
a second coupling component rotatable about a transmission axis (A),
an inner friction ring which has a conical surface on a radially outer face and is connected to the first coupling component for joint rotation with and for axial displacement with respect to the first coupling component,
an outer friction ring which has a conical surface on a radial inner face and is connected to the first coupling component for joint rotation with and for axial displacement with respect to the first coupling component, and
an intermediate friction ring which comprises a friction cone and is connected to the second coupling component for joint rotation with and for axial displacement with respect to the second coupling component,
the friction cone extending between the conical surface of the inner friction ring and the conical surface of the outer friction ring,
the first coupling component and the second coupling component being decoupled in the rotation direction in an axial starting position of the outer friction ring and being coupled in a frictional fit in the rotation direction in an axial frictional fit position of the outer friction ring,
wherein the intermediate friction ring has a C-shaped ring

Assignees

• Hoerbiger Antriebstechnik Hold

Inventors

• Binder Juergen
• Oezkan Sami
• Echtler Peter
• Dempfle Andreas
• Minkwitz Philip
• Schuler Tobias
• Traut Christopher

Classifications

• F16H57/0432

  Lubricant guiding means on or inside shift rods or shift forks · CPC title

• F16H2200/0065

  the gear ratios comprising nine forward speeds · CPC title

• F16D13/32

  in which two or more axially-movable members are pressed from one side towards an axially-located member · CPC title

• F16H2200/2094

  using positive clutches, e.g. dog clutches · CPC title

• F16D23/06 Primary

  and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation · CPC title