Patent ID: 9151361
Filing Date: 2015-10-06
Classification: F16H,Y10T

Abstract:
1. A gearbox arrangement comprising a first gearbox, an adjoining range gearbox, and a connecting element included in the range gearbox, wherein the first gearbox comprises: at least one input shaft, and at least one countershaft, each of the at least one input shaft and the at least one countershaft having at least two primary gearwheels, respectively, wherein one of the primary gearwheels on the input shaft and one of the primary gearwheels on the at least one countershaft are configured to operate together to provide a transmission ratio for a speed of the input shaft, at least one first motion-transmitting connection including one of the primary gearwheels on the at least one countershaft, the at least one first motion-transmitting connection being configured to connect one of the at least two primary gearwheels on the at least one input shaft to the range gearbox and to transmit rotary motion from the one of the at least two primary gearwheels on the at least one input shaft to the range gearbox, the range gearbox being configured to convert the transmission ratio to a low transmission ratio or a high transmission ratio before the rotary motion is led to an output shaft, each of the at least two primary gearwheels on the at least one input shaft connected to the range gearbox being configured to operate in a first gear, the first gear providing the low transmission ratio before the rotary motion is led to the output shaft, and each of the at least two primary gearwheels on the at least one input shaft connected to the range gearbox being configured to operate in a second gear, the second gear providing the high transmission ratio before the rotary motion is led to the output shaft, and at least one second motion-transmitting connection comprising one of the primary gearwheels on the at least one countershaft, of the at least one countershaft, a first secondary gearwheel on of the at least one countershaft, a second secondary gearwheel on an extra shaft, the extra shaft, and the connecting element which is continuously and rigidly connected to: (1) the extra shaft and (2) the output shaft, and being configured to connect one of the at least two primary gearwheels on the at least one input shaft to the output shaft and to transmit rotary motion from the one of the at least two primary gearwheels on the at least one input shaft through the at least one countershaft, the first secondary gearwheel on the at least one countershaft, the second secondary gearwheel on the extra shaft, the extra shaft, and the connecting element to the output shaft, the gearbox arrangement being configured to allow each of the at least two primary gearwheels on the at least one input shaft, which are connected to the output shaft, to operate in at least one extra gear, in addition to the first gear and the second gear, wherein the first gearbox is configured to transmit rotary motion through the at least one second motion-transmitting connection, each of the at least two primary gearwheels on the at least one input shaft, which are connected to the output shaft, being so dimensioned that: the at least one extra gear has a higher transmission ratio than the low transmission ratio of the first gear, and the at least one extra gear has a lower transmission ratio than the high transmission ratio of the second gear.