JP7103864B2 - Gear equipment for railway vehicles - Google Patents

Description

The present invention includes a gear box, and the small gear connected to the output shaft of the drive source and the large gear connected to the axle are housed in the gear box in a state of being horizontally meshed with each other. Regarding the device.

Conventionally, as a gear device for a railway vehicle of this type, a first oil sump portion in which the lower portion of a large gear is immersed in a gear box, a second oil sump portion located below a small gear, and a first oil sump It is known that a partition wall for partitioning a portion and a second oil sump portion is provided, and a communication hole for communicating the second oil sump portion and the first oil sump portion is formed in the partition wall (for example,). , Patent Document 1).

Here, lubricating oil is stored in the gear box, and this lubricating oil is scraped up by the rotation of the large gear. The scraped up lubricating oil is supplied to each lubrication point such as the meshing point of the small gear and the large gear and the bearing, and is heated at the lubrication point. When the amount of lubricating oil that is scraped up by the rotation of the large gear increases, the temperature of the lubricating oil tends to rise, and the lubricating oil deteriorates at an early stage. In the above-mentioned conventional example, since only the lubricating oil in the first oil sump is scraped up by the rotation of the large gear, it is possible to reduce the amount of the lubricating oil scraped up and suppress the temperature rise of the lubricating oil. It becomes.

However, in the above-mentioned conventional example, since the first oil sump extends over the entire width between the side walls on both sides in the axial direction of the gearbox, the volume of the first oil sump cannot be sufficiently reduced. .. As a result, the amount of lubricating oil scraped up from the first oil sump by the rotation of the large gear is not sufficiently reduced, and the temperature rise of the lubricating oil cannot be sufficiently suppressed.

Jitsukaisho 62-22357 Gazette

In view of the above points, it is an object of the present invention to provide a gear device for railway vehicles capable of sufficiently suppressing a temperature rise of the lubricating oil and reducing the frequency of replacement of the lubricating oil as much as possible. There is.

In order to solve the above problems, the present invention includes a gear box, in which the small gear connected to the output shaft of the drive source and the large gear connected to the axle are meshed with each other in the horizontal direction. The first oil reservoir in which the lower part of the large gear is immersed in the gear box, the second oil reservoir located below the small gear, and the first oil. A partition wall for partitioning the reservoir and the second oil reservoir is provided, and a communication hole for communicating the second oil reservoir and the first oil reservoir is formed in the partition wall. A pair of partition walls located on both outer sides of the large gear in the axial direction are erected at the lower part of the peripheral wall of the gear box along the lower surface, and the first oil reservoir is defined between the partition walls, and each partition wall and the gear box are defined. A third oil reservoir that communicates with the second oil reservoir is defined between the side walls on each side in the axial direction of the gear, and the third oil reservoir is in a non-communication state with each partition wall with respect to the first oil reservoir. It is characterized by being partitioned into.

According to the present invention, the width of the first oil sump is reduced from the width between the side walls on both sides in the axial direction of the gearbox to the width between the pair of partition walls located inside the side walls, so that the first oil sump is reduced. The volume of the part can be made as small as possible. As a result, the amount of lubricating oil scraped up from the first oil sump by the rotation of the large gear can be reduced as much as possible, and the temperature rise of the lubricating oil can be sufficiently suppressed. Further, the total amount of lubricating oil stored in the portion other than the first oil sump can be increased by the amount of the third oil sump defined on the outside of each partition wall, and the temperature rise of the lubricating oil can be suppressed. In combination with this, the frequency of lubricating oil replacement can be reduced as much as possible.

FIG. 5 is a cross-sectional view of a gear device for a railway vehicle according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG.

With reference to FIG. 1, the rail vehicle gear device according to the embodiment of the present invention includes a gear box 1. In the gear box 1, the small gear 2 connected to the output shaft 21 of the drive source (not shown) and the large gear 3 connected to the axle 31 are housed in a state of being horizontally meshed with each other. With reference to FIGS. 2 to 3, the output shaft 21 and the axle 31 are pivotally supported by bearings 22 and 32 with respect to the gear box 1, respectively. A lid 11 is attached to the opening on the upper surface of the gear box 1 so as to cover the upper parts of the small gear 2 and the large gear 3.

Further, in the gear box 1, the first oil sump portion 4 in which the lower portion of the large gear 3 is immersed, the second oil sump portion 5 located below the small gear 2, the first oil sump portion 4 and the first oil sump portion 4 and the second 2 A partition wall 6 for partitioning the oil reservoir 5 is provided. The partition wall 6 is formed with a communication hole 61 that communicates the second oil sump portion 5 and the first oil sump portion 4.

A pair of partition walls 7 and 7 located on both outer sides of the large gear 3 in the axial direction are erected on the lower portion of the peripheral wall of the gear box 1 along the lower peripheral surface of the large gear 3. 1 The oil sump portion 4 is defined, and a third oil sump portion 8 communicating with the second oil sump portion 5 is defined between each partition wall 7 and the side wall on each side in the axial direction of the gear box 1. ing. The third oil sump portion 8 is partitioned from the first oil sump portion 4 by each partition wall 7 in a non-communication state. In the present embodiment, the communication hole 62 for communicating the third oil sump portion 8 and the second oil sump portion 5 with the partition wall 6 extending over the entire width between the side walls on both sides in the axial direction of the gear box 1. , 62 are formed, but the third oil sump portion 8 and the second oil sump portion 5 are communicated with each other by not providing a partition wall between the side walls on both sides of the gear box 1 in the axial direction and the partition wall 7. May be good.

An opening is formed in the lower surface of the peripheral wall which is the bottom surface of the first oil sump portion 4 of the gear box 1, and the plug body 12 is attached to this opening. A drain bolt 12a is detachably screwed into the plug body 12 so that the lubricating oil in the gear box 1 can be discharged to the outside. Further, bearing boxes 13 that are tightly fitted to the bearings 22 and 32 are mounted on the openings of the side walls on both sides of the gear box 1 in the axial direction.

Here, lubricating oil is stored in the gear box 1, and this lubricating oil is scraped up by the rotation of the large gear 3. The scraped-up lubricating oil is supplied to each lubricating portion such as the meshing portion of the small gear 2 and the large gear 3 and the bearings 22 and 32, and is heated at the lubricated portion. When the amount of lubricating oil scraped up by the rotation of the large gear 3 increases, the temperature of the lubricating oil tends to rise, and the lubricating oil deteriorates at an early stage. According to the present embodiment, the width of the first oil sump portion 4 is reduced from the width between the side walls on both sides in the axial direction of the gearbox 1 to the width between the pair of partition walls 7 and 7 located inside the side walls. Therefore, the volume of the first oil sump portion 4 can be reduced as much as possible. As a result, the amount of lubricating oil scraped up from the first oil sump 4 by the rotation of the large gear 3 can be reduced as much as possible, and the temperature rise of the lubricating oil can be sufficiently suppressed. Further, the total amount of lubricating oil stored in the portion other than the first oil sump portion 4 can be increased by the amount of the third oil sump portion 8 defined on the outside of each partition wall 7, and the temperature of the lubricating oil rises. In addition to being able to suppress the problem, the frequency of lubricating oil replacement can be reduced as much as possible.

1 ... Gear box, 21 ... Output shaft, 2 ... Small gear, 31 ... Axle, 3 ... Large gear, 4 ... 1st oil sump, 5 ... 2nd oil sump, 6 ... Partition wall, 61 ... Communication hole, 7 ... partition, 8 ... third oil sump.

Claims (1)

A gear device for rolling stock that is provided with a gear box and is housed in the gear box with the small gears connected to the output shaft of the drive source and the large gears connected to the axles meshed with each other in the horizontal direction. ,
A partition wall that separates the first oil reservoir in which the lower part of the large gear is immersed in the gear box, the second oil reservoir located below the small gear, and the first oil reservoir and the second oil reservoir. Is provided, and a communication hole for communicating the second oil sump portion and the first oil sump portion is formed on the partition wall.
A pair of partition walls located on both outer sides in the axial direction of the large gear are erected at the lower part of the peripheral wall of the gear box along the lower peripheral surface of the large gear, and the first oil reservoir is defined between the two partition walls. A third oil sump that communicates with the second oil sump is defined between the partition and the side walls on each side of the gear box in the axial direction, and the third oil sump is each partition with respect to the first oil sump. A gear device for railway vehicles, which is characterized by being partitioned in a non-communication state.

Images