Transfer case arrangement

Abstract

The invention relates to a transfer case arrangement comprising a first output shaft, a second output shaft, a clutch for the distribution of a torque between the output shafts, a shutdown device for the shutting down of the second output shaft when the clutch is disengaged and a lubrication device for the lubrication of the clutch and/or of another component of the transfer case arrangement.

1 . A transfer case arrangement comprising
 a first output shaft;   a second output shaft;   a clutch for distributing a torque between the output shafts;   a shutdown device for shutting down the second output shaft when the clutch is disengaged;   a lubrication device for lubricating the clutch and/or another component of the transfer case arrangement, the lubrication device having an oil conveying device for conveying lubrication oil; and   a control that activates the oil conveying device periodically when the second output shafts shut down.   
   
   
       2 . The transfer case arrangement in accordance with  claim 1 , wherein the control activates the oil conveying device intermittently when the second output shaft is shut down. 
   
   
       3 . The transfer case arrangement in accordance with  claim 1 , wherein the oil conveying device includes an electrically driven pump or a pump driven by the second output shaft. 
   
   
       4 . The transfer case arrangement in accordance with  claim 1 , wherein the oil conveying device is formed by a chain drive or by a gear connection connected between an output of the clutch and the second output shaft. 
   
   
       5 . The transfer case arrangement in accordance with  claim 1 , wherein activation of the oil conveying device takes place by an at least partial engagement of the clutch. 
   
   
       6 . The transfer case arrangement in accordance with  claim 1 , wherein the oil conveying device conveys the lubrication oil from an oil sump of the transfer case into a region of the transfer case disposed above the clutch or above the another component. 
   
   
       7 . The transfer case arrangement in accordance with  claim 1 , wherein the lubrication device includes an oil reservoir for collecting the lubrication oil conveyed by the oil conveying device such that an oil level in the oil reservoir is above an outlet opening of a supply line leading from the oil reservoir to the clutch or to the another component. 
   
   
       8 . The transfer case arrangement in accordance with  claim 1 , wherein the second output shaft transmits of torque to wheels of a motor vehicle and the shutdown device is connected between the wheels and the second output shaft. 
   
   
       9 . The transfer case arrangement in accordance with  claim 1 , wherein the shutdown device is arranged at the hubs of the wheels. 
   
   
       10 . The transfer case arrangement in accordance with  claim 1 , wherein the shutdown device is arranged at an output of an axial differential of a vehicle axle driving the wheels. 
   
   
       11 . The transfer case arrangement in accordance with  claim 1 , wherein the control activates the oil conveying device during a deceleration or a coasting mode of a motor vehicle in which the transfer case arrangement is arranged. 
   
   
       12 . A method for lubricating a clutch and/or another component of a transfer case arrangement that includes a first output shaft and a second output shaft, the clutch distributing a torque between the output shafts the method comprising:
 shutting down the second output shaft with a shutdown device when the clutch is disengaged; and   lubricating the clutch and/or the another component of the transfer case arrangement with a lubrication device having an oil conveying device for conveying lubrication oil, the oil conveying device being activated periodically when the second output shaft is shut down.   
   
   
       13 . The method in accordance with  claim 12 , wherein the oil conveying device is activated by an at least partial engagement of the clutch. 
   
   
       14 . The method in accordance with  claim 12 , wherein the oil conveying device is activated during a deceleration or a coasting mode of a vehicle in which the transfer case arrangement is arranged.