Shifting group, and drive train with a shifting group of this type

Patent metadata

Field	Value
Publication number	US-11808305-B2
Application number	US-202017606100-A
Country	US
Kind code	B2
Filing date	Apr 2, 2020
Priority date	Apr 23, 2019
Publication date	Nov 7, 2023
Grant date	Nov 7, 2023

Abstract

A shifting group for a drive train of a motor vehicle for coupling and decoupling a drive shaft of a drive train as required, with an actuator for actuating a blocking element, a selector rod and a selector fork which is connected to the selector rod. The first drive shaft and the second drive shaft are arranged coaxially with respect to one another, the blocking element blocks an axial displacement of the selector rod in a first switching position and enables said axial displacement in a second switching position, the selector fork engages into a groove of one of the drive shafts, an actuation of the shifting group brings about an axial displacement of a drive shaft, and a clutch between the first drive shaft and the second drive shaft is opened or closed by way of the axial displacement of the selector fork.

First claim

The invention claimed is:

1. A shifting group for a drive train of a motor vehicle for coupling and decoupling a drive shaft of the drive train, the shifting group comprising:
an actuator for actuating a blocking element;
a selector rod and a selector fork which is connected to the selector rod, and a control pin received in the selector rod which protrudes in a radial direction over the selector rod;
the drive shaft including a first drive shaft and a second drive shaft arranged coaxially with respect to one another;
the blocking element being configured for blocking an axial displacement of the selector rod in a first shifting position and releasing the selector rod for axial displacement in a second shifting position;
the selector fork engages into a groove of one of the first or second drive shafts, and an actuation of the shifting group brings about an axial displacement of the one of the first or second drive shafts; and
a clutch between the first drive shaft and the second drive shaft is adapted to be opened or closed by the axial displacement of the selector fork such that a drive torque is transmitted from the first drive shaft to the second drive shaft in a first operating state, and in a second operating state a connection between the first drive shaft and the second drive shaft is interrupted.

2. The shifting group according to claim 1 , wherein the actuator comprises a lifting magnet.

3. The shifting group according to claim 1 , wherein the blocking element has a blocking pawl which in the first shifting position rests in a groove of the selector rod and blocks an axial displacement of the selector rod and the blocking pawl is disengaged from the groove in a second shifting position and enables the selector rod to be displaced axially.

4. The shifting group according to claim 1 , wherein the selector rod is pretensioned in an axial direction by a compression spring.

5. The shifting group according to claim 1 , further comprising a control contour formed on one of the first or second drive shafts, the control contour being movable into operative connection with the control pin to displace the selector rod in an axial direction.

6. The shifting group according to claim 1 , further comprising a torsion spring in operative connection with the blocking element such that the torsion spring is configured to rotate the blocking element back to an initial position when the actuator is not actuated.

7. The shifting group according to claim 1 , wherein the first drive shaft and the second drive shaft are connectable to one another by the clutch which comprises a dog clutch.

8. The shifting group according to claim 1 , further comprising a synchronization mechanism arranged between the first drive shaft and the second drive shaft configured to equalize speeds of the drive shafts.

9. A drive train, comprising the shifting group according to claim 1 , wherein the first drive shaft is connectable to a first drive motor or a transmission, and the second drive shaft is connectable to a second drive motor, and the first drive shaft and the second drive shaft being connectable to one another via the clutch.

10. A shifting group for a drive train of a motor vehicle, the shifting group comprising:
an actuator for actuating a blocking element;
a selector rod and a selector fork connected to the selector rod;
the blocking element having a pawl that blocks an axial displacement of the selector rod in a first shifting position and releases the selector rod for axial displacement in a second shifting position;
a first drive shaft and a second drive shaft arranged coaxially aligned with respect to one another;
the selector fork engages into a groove of the first drive shaft and actuation of the shifting group brings about an axial displacement of the first drive shaft toward the second drive shaft; and
a clutch between the first drive shaft and the second drive shaft is adapted to be opened or closed by the axial displacement of the selector fork such that a drive torque is transmitted from the first drive shaft to the second drive shaft in a first operating state, and a connection between the first drive shaft and the second drive shaft is interrupted in a second operating state.

11. The shifting group according to claim 10 , wherein the actuator comprises a lifting magnet.

12. The shifting group according to claim 10 , wherein the pawl rests in a groove of the selector rod in the first shifting position and blocks an axial displacement of the selector rod and the pawl is disengaged from the groove in a second shifting position and enables the selector rod to be displaced axially.

13. The shifting group according to claim 10 , further comprising a compression spring that pretensions the selector rod in an axial direction to shift the first drive shaft in the axial direction upon activation of the actuator.

14. The shifting group according to claim 10 , further comprising a control pin received in the selector rod which protrudes in a radial direction beyond the selector rod.

15. The shifting group according to claim 14 , further comprising a control contour formed on the second drive shaft, the control contour being movable into operative connection with the control pin to displace the selector rod in an axial direction to the position in which the connection between the first drive shaft and the second drive shaft is interrupted.

16. The shifting group according to claim 10 , further comprising a spring that biases the blocking element to the first shifting position when the actuator is not actuated.

17. The shifting group according to claim 10 , wherein the clutch which comprises a dog clutch.

18. The shifting group according to claim 10 , further comprising a synchronizer arranged between the first drive shaft and the second drive shaft.

19. A shifting group for a drive train of a motor vehicle for coupling and decoupling a drive shaft of the drive train, the shifting group comprising:
an actuator for actuating a blocking element;
a selector rod and a selector fork which is connected to the selector rod;
the drive shaft including a first drive shaft and a second drive shaft arranged coaxially with respect to one another;
the blocking element being configured for blocking an axial displacement of the selector rod in a first shifting position and releasing the selector rod for axial displacement in a second shifting position;
a torsion spring in operative connection with the blocking element such that the torsion spring is configured to rotate the blocking element back to an initial position when the actuator is not actuated;
the selector fork engages into a groove of one of the first or second drive shafts, and an actuation of the shifting group brings about an axial displacement of the one of the first or second drive shafts; and
a clutch between the first drive shaft and the second drive shaft is adapted to be opened or closed by the axial displacement of the selector fork such that a drive torque is transmitted from the first drive shaft to the second drive shaft in a first operating state, and in a second operating state a connection between the first drive shaft and the second drive shaft is interrupted.

20. A drive train, comprising the shifting group according to claim 19 , wherein the first drive shaft is connectable to a first drive motor or a transmission, and the second drive shaft is connectable to a second drive motor, and the first drive shaft and the second drive shaft being connectable to one another

Assignees

• Schaeffler Technologies Ag

Inventors

• Loeffelmann Jochen
• Leubner Simon
• Neugebauer Waldemar

Classifications

• F16D11/10 Primary

  with clutching members movable only axially · CPC title

• F16D11/14 Primary

  with clutching members movable only axially (F16D11/02, F16D11/08 take precedence) · CPC title

• F16D23/12

  Mechanical clutch-actuating mechanisms arranged outside the clutch as such (specific for combined clutches F16D21/00; mechanisms specific for synchronisation F16D23/02) · CPC title

• F16D27/108

  with axially movable clutching members · CPC title

• F16D23/02

  Arrangements for synchronisation, also for power-operated clutches (shape or mounting of interengaging parts of clutch members to facilitate engagement F16D11/08) · CPC title