Transfer case with clutch unit for connecting two output shafts, and coupling method
AssigneeSteyr Powertrain AG & Co KG
InventorDieter Schmidl
Life of this patent
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Abstract
A transfer case having a clutch unit, to produce a connection between a first output shaft and a second output shaft includes a claw clutch associated with a synchronizer clutch which comprises a first synchronizer part, which is connected in a rotationally fixed manner to the first output shaft, and a second sychronizer part, which is connected in a rotationally fixed manner to a first clutch part.
Claims7
A transfer case for the drive train of a motor vehicle, which comprises a clutch unit by means of which it is possible to produce the connection between a first output shaft and a second output shaft, the clutch unit comprising:
- a) a first clutch part, rotatably mounted on the first output shaft and displaceable in an axial direction and having first clutch disks arranged in a rotationally fixed but translationally movable manner thereon,
- b) a second clutch part, mounted for coaxial rotation with the first clutch part and connected in a rotationally fixed manner to the second output shaft and having second clutch disks which are arranged in a rotationally fixed but translationally movable manner thereon,
- c) a pressure plate displaceable axially toward the first clutch part, a first spring being provided between the pressure plate and the first clutch part,
- d) a claw clutch, comprising a primary part rotatable with the first output shaft, and a secondary part rotatable with the first clutch part wherein the primary part and secondary part are selectively brought into engagement with one another counter to the force of a second spring, wherein
- e) the force exerted by the first spring is greater than the force exerted by the second spring, and
- f) the claw clutch is associated with a synchronizer clutch which comprises a first synchronizer part, which is connected in a rotationally fixed manner to the first output shaft, and a second synchronizer part, which is connected in a rotationally fixed manner to the first clutch part.
A method for engaging a clutch unit, by means of which it is possible to produce the connection between a first output shaft and a second output shaft, the clutch unit comprising a multidisk clutch and a claw clutch with synchronizer clutch, the multidisk clutch comprising a first clutch part, which is mounted rotatably on the first output shaft, a second clutch part, which is connected in a rotationally fixed manner to the second output shaft, and the claw clutch comprising a primary part, which is formed on the first output shaft, and a secondary part formed on the first clutch part, in which method the following steps are carried out:
- a) firstly, the first output shaft accelerates the first clutch part by means of the synchronizer device,
- b) when first output shaft and first clutch part are running synchronously, the claw clutch is engaged,
- c) therefore, the multidisk clutch couples the second output shaft to the first output shaft.
Dependencies are inferred from the claim text.