Transmission with an oil pump

Patent metadata

Field	Value
Publication number	US-2015167820-A1
Application number	US-201214409237-A
Country	US
Kind code	A1
Filing date	Jul 9, 2012
Priority date	Jul 9, 2012
Publication date	Jun 18, 2015
Grant date	—

Abstract

A transmission includes an input shaft, a main shaft, a countershaft, and an oil pump. The input shaft, the main shaft and the countershaft are provided with gearwheels in order to enable torque transfer in a plurality of forward and backward gear speeds. The oil pump is provided with a freewheel mechanism, which includes an oil pump driveshaft, a first pump drive gearwheel and a first and a second freewheel arranged upon the oil pump driveshaft. Both the first and the second freewheel can transfer torque to the oil pump drive shaft in one and the same direction. The first freewheel is in drive connection with the countershaft and the second freewheel is connected to the first pump drive gearwheel, which meshes with a first gearwheel coaxial with the main shaft and which first gearwheel transfers torque in at least one of the forward or backward gear speeds.

First claim

1 . Transmission comprising;
an input shaft a main shaft; a countershaft; and an oil pump, wherein the input shaft, the main shaft and the countershaft are provided with gearwheels in order to enable torque transfer in a plurality of forward and backward gear speeds, and wherein the oil pump is provided with a freewheel mechanism, which comprises an oil pump driveshaft, a first pump drive gearwheel and a first and a second freewheel arranged upon the oil pump driveshaft, wherein both the first and the second freewheel can transfer torque to the oil pump drive shaft in one and the same direction, wherein the first freewheel is in drive connection with the countershaft and the second freewheel is connected to the first pump drive gearwheel, which meshes with a first gearwheel coaxial with the main shaft and which first gearwheel transfers torque in at least one of the forward or backward gear speeds.

2 . Transmission according to claim 1 , wherein the oil pump driveshaft is coaxial with the countershaft and the first freewheel is connected to the countershaft.

3 . Transmission according to claim 1 , wherein the first pump drive gearwheel is arranged upon the countershaft, such that it can rotate thereupon.

4 . Transmission according to claim 1 , wherein the first gearwheel is a loose gearwheel arranged upon an input shaft of the transmission, wherein the loose gearwheel is a reverse gearwheel which meshes with a reverse idler gear which transfers torque to the countershaft in a reverse gear speed.

5 . Transmission according to claim 1 , wherein the countershaft is a hollow shaft and wherein the oil pump driveshaft extending within the hollow shaft such that the oil pump is arranged at one end the hollow shaft and at least a part of the freewheel mechanism is arranged at the other end of said the hollow shaft.

6 . Transmission according to claim 5 , wherein the first freewheel is arranged at the same end of the countershaft as the oil pump and the second freewheel is arranged upon the opposite end of the countershaft.

7 . Transmission according to claim 1 , wherein the first freewheel is connected to a second pump drive gearwheel, wherein the second pump drive gearwheel meshes with a second gearwheel which is provided upon the countershaft and which transfers torque in at least one of the forward or backward speeds.

8 . Transmission according to claim 7 , wherein the first gearwheel which is coaxial with the main shaft and meshes with the first pump drive gearwheel also meshes with the second gearwheel, which is provided upon the countershaft and meshes with the second pump drive gearwheel.

Assignees

• Hedman Anders
• Nylund Clas
• Volvo Lastvagnar Ab

Inventors

• Hedman Anders
• Nylund Clas

Classifications

• F16H3/0915

  with coaxial input and output shafts · CPC title

• F16H57/0494

  with variable gear ratio or for reversing rotary motion · CPC title

• F16H57/0441 Primary

  Arrangements of pumps · CPC title

• F16H2200/0043

  the gear ratios comprising four forward speeds · CPC title

• Y10T74/19605

  Reversing means · CPC title