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DE-102011003249-B4 - Gearbox arrangement for a rail vehicle

DE102011003249B4DE 102011003249 B4DE102011003249 B4DE 102011003249B4DE-102011003249-B4

Abstract

Gear arrangement for a rail vehicle with at least one gear stage (1) comprising at least a first gear (3) as a drive gear and at least a second gear (4) as a driven gear in a gear housing (2), wherein at least one of the meshing gears (3, 4) of the gear stage (1) is assigned to at least one lubricant inlet (10) as the suction side and at least one lubricant outlet (11) as the pressure side of a lubricant supply for lubricant delivery via the toothing, wherein at least one of the gears (3, 4) has at least a section-fixed casing (12) along the toothing of the gear (3, 4) to increase the lubricant delivery in the circumferential direction from the lubricant inlet (10) to the lubricant outlet (11), wherein the casing (12) extends from a lubricant inlet (10) arranged in the lower region of the gear stage along the toothing of one of the two gears (3, 4) to at least a section between the two gears (3, 4) extends beyond the gear engagement area (6), characterized in that the gear housing (2) is composed of two housing halves, wherein the two housing halves are essentially vertically separated, so that a separation joint between the two housing halves lies essentially in a vertical plane that is arranged perpendicular to the axis of rotation of the covered gear (4), and that the covering (12) is formed from parts of the two housing halves.

Inventors

  • Milos Mahler
  • Dieter Panowitz
  • Christoph Sacher

Assignees

  • ZF FRIEDRICHSHAFEN AG

Dates

Publication Date
20260513
Application Date
20110127

Claims (6)

  1. Gear arrangement for a rail vehicle with at least one gear stage (1) comprising at least a first gear (3) as a drive gear and at least a second gear (4) as a driven gear in a gear housing (2), wherein at least one of the meshing gears (3, 4) of the gear stage (1) is assigned to at least one lubricant inlet (10) as the suction side and at least one lubricant outlet (11) as the pressure side of a lubricant supply for lubricant delivery via the toothing, wherein at least one of the gears (3, 4) has at least a section-fixed casing (12) along the toothing of the gear (3, 4) to increase the lubricant delivery in the circumferential direction from the lubricant inlet (10) to the lubricant outlet (11), wherein the casing (12) extends from a lubricant inlet (10) arranged in the lower region of the gear stage along the toothing of one of the two gears (3, 4) to at least a section between the two gears (3, 4) arranged tooth engagement area (6), characterized in that the gear housing (2) is composed of two housing halves, wherein the two housing halves are essentially vertically separated, so that a separation joint between the two housing halves lies essentially in a vertical plane which is arranged perpendicular to the axis of rotation of the covered gear (4), and that the covering (12) is formed from parts of the two housing halves.
  2. Gear arrangement according to Claim 1 , characterized in that the casing (12) is provided for the second gear (4), which is designed as a driven gear and has a larger diameter in relation to the diameter.
  3. Gear arrangement according to Claim 1 or 2 , characterized in that the casing (12) is formed on a lubricant tray (7) provided in the area of the lubricant inflow (10).
  4. Gear arrangement according to one of the preceding claims, characterized in that the axial width of the covered gear (4) is wider than the axial width of the other gear (3) to increase the lubricant delivery.
  5. Gear arrangement according to one of the preceding claims, characterized in that at least one of the gears (3, 4) has at least one lubricant delivery element for additional lubricant delivery.
  6. Gear arrangement according to one of the preceding claims, characterized in that the lubricant drain (11) is connected to at least one lubricant channel (13) for supplying lubricant to rolling bearings (15), wherein the lubricant channel (13) is guided in the gear housing (2) in such a way that a heat exchanger (14) integrated in the gear housing is formed for lubricant cooling.

Description

The present invention relates to a transmission arrangement for a rail vehicle with at least one transmission stage according to the type defined in more detail in the preamble of claim 1. Gear arrangements for rail vehicles with circulating lubrication are known, in which the lubricant or oil is conveyed by the teeth of a gear in the gear stage from a lubricant sump into a so-called high sump in the upper part of the gearbox housing. From the high sump, the oil flows by gravity through corresponding channels to the rolling bearings. For example, from the printed text DE 203 12 235 U1 A gearbox, in particular a wheelset gearbox for use in railway vehicles, is known. The known gearbox comprises a spur gear stage in a gearbox housing as a torque conversion device, wherein the spur gear stage has a spur gear coupled to an axle as the output of the torque conversion device. The spur gear is associated with an oil pan provided in the lower part of the housing. During operation, when the spur gear rotates, lubrication occurs via the gear teeth, as the teeth are at least partially immersed in the oil pan. However, it has been found that in the known gearbox, lubricant or oil is squeezed out by the meshing of the two spur gears of the spur gear stage and is therefore not available for targeted lubrication. Consequently, the lubrication of the rolling bearings occurs randomly unless an additional lubricant pump is provided, which is particularly useful in applications with higher lubricant requirements. However, an additional lubricant pump is maintenance-intensive and costly and represents an increased risk of failure. From the GB 292 540 A Furthermore, a transmission with two meshing gears is known, in which one of the two gears has a housing-fixed covering along the toothing of the gear to increase the lubricant delivery in the circumferential direction from a lubricant inflow to a lubricant outflow. The present invention is based on the objective of proposing a gear arrangement of the type described above in which an adequate supply of lubricant is ensured regardless of the applications without the use of an additional lubricant pump. This problem is solved according to the invention by the features of claim 1. Further advantageous embodiments are described in the dependent claims and the drawings. Accordingly, a gear arrangement is proposed, for example in a rail vehicle, comprising at least one gear stage, which includes at least a first gear as a drive gear and at least a second gear as an output gear in a gear housing. At least one of the meshing gears of the gear stage can be assigned to at least one lubricant inlet as the suction side and at least one lubricant outlet as the pressure side of a lubricant supply for lubricant delivery via the gear teeth. According to the invention, at least one of the gears is provided with a housing-mounted casing, at least partially, along the gear teeth, at least partially on the axial and/or radial outer circumferential region of the gear. This significantly increases the lubricant delivery in the circumferential direction from the lubricant inlet to the lubricant outlet. The gear casing provided according to the invention along the outer circumference of the gear enables targeted lubricant guidance between the gear housing and the outer circumference of the gear in the area of the teeth. For example, the lubricant or oil squeezed out by the tooth engagement is also conveyed upwards to the lubricant drain or pressure side due to the rotation of the gear and the resulting pumping effect in the gap between the gear and the casing, thus supplying the lubricant to the lubrication circuit. Regardless of the direction of rotation, the lubricant delivery rate of the gear arrangement according to the invention can be increased to such an extent that sufficient oil transport or lubricant supply is ensured even in applications with high lubricant requirements. According to the invention, the casing extends at least from a lubricant sump located in the lower region of the gear stage, with its lubricant inlet, to beyond a tooth engagement area between the two gears. In the tooth engagement area, the casing is only partially recessed to allow the two gears to mesh. In this simpler and more cost-effective embodiment of the invention, the lubricant is conveyed from the lubricant sump in the lower region of the gearbox, which represents the suction side, to above the tooth engagement area. The pressure In this design, the lubricant outlet is located, for example, directly above the gear mesh, where the lubricant flows out of the gap between the gear and the casing and is then directed to the lubrication points. The lubricant can be guided from the outlet to individual lubrication points, for example, by lubricant channels, guide plates, or contours attached to the inner wall of the gearbox housing. Preferably, the coating according to the invention can be provided on the second gear, wh