WO2019003976A1

WO2019003976A1 - Lubricating oil purifying device for transmission

Info

Publication number: WO2019003976A1
Application number: PCT/JP2018/023086
Authority: WO
Inventors: 幸士寺島
Original assignee: いすゞ自動車株式会社
Priority date: 2017-06-26
Filing date: 2018-06-18
Publication date: 2019-01-03
Also published as: JP6916417B2; CN110832229B; CN110832229A; JP2019007565A

Abstract

A lubricating oil purifying device for a transmission in which lubricating oil is stored inside a case, wherein a filter that purifies the lubricating oil is disposed on a case wall surface that, in a radial direction, faces a rotational solid disposed inside the case.

Description

Transmission oil purification device for transmission

The present disclosure relates to a lubricating oil purification device for a transmission that purifies lubricating oil stored inside the transmission.

Conventionally, in a transmission in which a plurality of shafts and gears are disposed inside a case to transmit power, lubricating oil is stored inside the case and, for example, each shaft or gear is lubricated by bouncing up a rotating gear. It is known to supply oil.

Further, as such a transmission, there has been known one in which a lubricating oil purification device is disposed inside the case to suppress a defect caused by the deterioration of the lubricating oil while extending the life of the lubricating oil (for example, Patent Document 1).

The lubricating oil purifier disclosed in the patent document 1 is one in which a filter for collecting and purifying (filtering) a part of the jumped up lubricating oil is disposed in the inside of the case, and among the oil jumped up by the gear A filter is placed on the bouncing path of the lubricating oil that can not be poured into the shaft or gear.

Japanese Patent Application Laid-Open No. 2005-003026

However, in the lubricating oil purification device for a transmission disclosed in such prior art documents, it is necessary to dispose a filter on the bouncing trajectory of the lubricating oil which can not be poured into the shaft or gear inside the case. . For this reason, it is necessary to secure an arrangement space for disposing the filter in a narrow case, and there is a problem that it is difficult to efficiently collect the lubricating oil splashed up by a plurality of gears. The

The technique of the present disclosure can efficiently dispose a filter inside a narrow case in order to solve the problems as described above, and can efficiently collect lubricating oil in which a plurality of gears jump up. It is an object of the present invention to provide a lubricating oil purification device for a transmission.

The technique of the present disclosure is a lubricating oil purification device for a transmission in which lubricating oil is stored inside a case to achieve the above object, and the case radially faces the rotating body disposed inside the case. A filter for purifying lubricating oil is disposed on the wall surface.

Also, the filter is preferably dipped in lubricating oil at its lower part.

Further, it is preferable that the upper edge of the filter, which is disposed on the side of the upper end of the rotating body in the counter direction with respect to the rotation direction, be positioned above the upper end of the rotating body.

The rotating body includes a lower gear disposed in the lower stage and an upper gear disposed in the upper stage, and the filter is a first disposed on the upper side of the lower gear in the counter direction with respect to the rotational direction. A filter and a second filter disposed opposite to the first filter, wherein the upper edge of the second filter is positioned above the upper end of the lower gear, and the upper edge of the second filter is located above the first filter The edge is preferably located above the upper edge of the second filter and the upper end of the upper gear.

According to the technology of the present disclosure, it is possible to provide a filter on the rotating body, to efficiently arrange the filter inside the narrow case, and to efficiently collect the lubricating oil in which a plurality of gears jump up. Can.

FIG. 1 is a cross-sectional view of an example of a transmission to which a lubricating oil purification device for a transmission according to the present embodiment is applied. FIG. 2 is a schematic cross-sectional view of the transmission taken along line AA of FIG. 1 to which the lubricating oil purification device for the transmission according to the present embodiment is applied.

Hereinafter, a lubricating oil purification device for a transmission according to an embodiment of the present disclosure will be described based on the attached drawings. In addition, the same code | symbol is attached | subjected to the same components, and those names and functions are also the same. Therefore, detailed description about them will not be repeated. For convenience of explanation, in FIG. 1, the left side in the drawing is referred to as the input side (one end side) in the power transmission direction, and the right side in the drawing is referred to as the output side (the other end side) in the power transmission direction. Further, in the following description, the upper and lower directions are the same as the upper and lower sides of the vehicle when mounted.

Moreover, in the following description, each direction of front and rear, right and left upper and lower is demonstrated as the same as front and rear, right and left upper and lower seen from the driver at the time of vehicle advance traveling. Therefore, the left and right direction is the same as the vehicle width direction. However, in the front, rear, left, right, up and down directions, it does not necessarily show the front, rear, left, right, up and down directions in a strict sense. For example, the front, rear, left, and right directions are not necessarily based on the horizontal plane, and the vertical directions are not necessarily based on the vertical direction, but include cases in which each direction is indicated in a functional sense.

The transmission 1 shown in FIG. 1 includes an input shaft 2, a main shaft 3, an output shaft 4, a countershaft 5, a clutch housing 6 and a transmission case 7.

The input shaft 2 is a shaft member through which rotational driving force generated by an engine (not shown) is transmitted through a crankshaft. At the output side end of the input shaft 2, a primary driven gear 8 which also serves as a bearing for rotatably supporting the input side end of the main shaft 3 is mounted. The input shaft 2 may support the primary driven gear 8 in a relatively non-rotatable manner by spline connection, and may support the main shaft 3 in a relatively rotatable manner via a bearing.

The main shaft 3 is disposed coaxially with the input shaft 2, and in addition to the primary driven gear 8, a driven gear group 11 including a plurality of transmission gears 9 and a sleeve 10 is mounted.

The output shaft 4 is disposed coaxially with the main shaft 3 at the output side end of the main shaft 3. A propeller shaft (not shown) is connected to the output side end of the output shaft 4.

The counter shaft 5 is disposed in parallel with the input shaft 2 and the main shaft 3. Mounted on the countershaft 5 is a drive gear group 14 including a primary drive gear 12 meshed with the primary driven gear 8 and a plurality of transmission gears 13. The transmission gears 13 of the drive gear group 14 mesh with the transmission gears 9 of the driven gear group 11.

The clutch housing 6 and the transmission case 7 are members serving as a housing in the transmission 1. The clutch housing 6 is disposed on the input side, and the transmission case 7 is disposed on the output side. The clutch housing 6 and the transmission case 7 form a housing space 15 in a fluid-tight state by joining the flange 6a at the output side end and the flange 7a at the input side so as to abut each other.

In the storage space 15, various components constituting the driven gear group 11 and the drive gear group 14 are stored. In the storage space 15, lubricating oil OL whose fluid level is near the axis of the countershaft 5 is stored. As a result, the lower half of the countershaft 5, the primary drive gear 12, and the plurality of transmission gears 13 are immersed in the lubricating oil OL.

As shown in FIG. 2, when the primary drive gear 12 and the transmission gear 13 rotate, the rotation of the primary drive gear 12 and the transmission gear 13 causes the lubricating oil OL to be lifted, and a part of the lubricant oil OL1 is a driven gear including the primary driven gear 8 and the transmission gear 9. Lubricant oil OL can be supplied to the group 11.

As shown in FIG. 1, the clutch housing 6 rotatably supports the vicinity of the output end of the input shaft 2 and the input side end of the countershaft 5 closer to the input side than the flange portion 6 a and A partition 6b is provided integrally to partition the input side. The partition 6 b supports a bearing 16 rotatably supporting the output end side of the input shaft 2 and a bearing 17 rotatably supporting the input side end of the countershaft 5.

Specifically, an opening 6 c for supporting the bearing 17 is formed in the partition wall 6 b. The opening 6 c is covered by a cover 18 so as to ensure a fluid-tight state of the storage space 15 from the outside (input side) of the partition wall 6 b. The cover 18 may be integral with the partition 6 b.

In the transmission case 7, the output side of the storage space 15 is partitioned by rotatably supporting the vicinity of the input side end of the output shaft 4 and the output side end of the countershaft 5 on the output side of the flange portion 7a. It has the partition 7b integrally. The partition 7 b is provided with a bearing 19 rotatably supporting the output end of the countershaft 5. The output side end of the main shaft 3 (or the input side end of the output shaft 4) is also rotatably supported by the partition 7b via a bearing (not shown).

As described above, the partition 6 b and the partition 7 b are power transmission components including the plurality of

shafts

2, 3, 4, 5 and the

gears

8, 9, 12, 13 that realize the power transmission function as the transmission 1. A storage space 15 is formed as the inside of the case to be stored.

The components such as the input shaft 2, the main shaft 3, the output shaft 4, the primary driven gear 8, the transmission gear 9, and the sleeve 10 that constitute the driven gear group 11 may be of known construction. Accordingly, these further detailed descriptions are omitted.

The countershaft 5, the primary drive gear 12, and the transmission gear 13, which constitute the drive gear group 14, can use components of a known technology as a component configuration as a power transmission function.

The functions of the primary driven gear 8 and the transmission gear 9, and the primary drive gear 12 and the transmission gear 13 for achieving power transmission to the

shafts

2, 3, 4, and 5 are substantially the same, and Gear characteristics such as the ratio) and the thickness. Therefore, in the following description, the relationship between transmission gear 9 and transmission gear 13 will be mainly described, and in the relationship between primary driven gear 8 and primary drive gear 12, only the corresponding reference numerals are attached in parentheses and the details thereof will be described. Description is omitted.

As shown in FIG. 2, in the transmission gear 13 (and the primary drive gear 12), for example, a through hole 13b (12b) through which the countershaft 5 penetrates is formed at the center of a substantially disk-like gear main body 13a (12a). ing. In addition, gear teeth 13c (12c) are formed on the outer peripheral surface of the gear main body 13a (12a).

The gear teeth 13c (12c) mesh with gear teeth 9a (8a) formed on the outer peripheral surface of the transmission gear 9 (and the primary driven gear 8). The meshing between the gear teeth 9a (8a) and the gear teeth 13c (12c) may be either of spur gears or helical gears.

As shown in FIG. 2, on both case wall surfaces radially opposed to the transmission gear 9 (8) and the transmission gear 13 (12) as rotating bodies disposed in the storage space 15, a filter for purifying the

lubricating oil OL

20 and 21 are arranged respectively.

The lower part of the

filters

20 and 21 is immersed in the lubricating oil OL and, for example, the filter 20 disposed on the upper end side of the upper end of the transmission gear 9 (8) in the counter direction with respect to the rotational direction. The upper edge is located above the upper end of the transmission gear 9 (8). Similarly, the upper edge of the filter 21 disposed on the upper side of the lower transmission gear 13 (12) in the counter direction with respect to the rotational direction is positioned higher than the upper end of the transmission gear 13 (12). ing. Note that, as shown in FIG. 2, the upper edge of the filter 20 may be positioned above the upper edge of the filter 21.

The filter 20 is provided directly on the case wall with, for example, an adhesive or the like, and is a substance capable of collecting and filtering impurities contained in the lubricating oil OL while having water absorbency, for example, foam such as sponge, A filter assembly incorporating a felt-like filter, a filter assembly coated with a non-reactive material including polytetrafluoroethylene (PTFE) or the like may be used. When a foam is used for the filter 20, it may be a synthetic foam or the like containing activated carbon or the like having a high effect of collecting (adsorbing) impurities.

As described above, the lubricating oil purification device of the transmission 1 according to the present embodiment has the

filters

20 and 21 on the case wall surface radially facing the transmission gear 9 (8) and the transmission gear 13 (12), which are rotating bodies. By directly disposing the filter 20, the filter 20 can be efficiently disposed in the narrow storage space 15, and the lubricating oil splashed up by the plurality of gears can be efficiently collected. Specifically, the lubricating oil purification device for the transmission 1 in which the lubricating oil OL is stored in the storage space 15, and the transmission gear 9 (8) and the transmission gear 13 (12) and the diameter arranged in the storage space 15 The

filters

20 and 21 which purify | cleans lubricating oil OL are arrange | positioned on the case wall surface which opposes by direction.

Next, the operation of the lubricating oil purification device of the transmission 1 will be described. In the above configuration, the input shaft 2 is rotated by the rotational force transmitted from the engine (not shown). The rotational force from the input shaft 2 is transmitted to the countershaft 5 by the meshing of the gear teeth 8 a of the primary driven gear 8 and the gear teeth 12 c of the primary drive gear 12.

When the countershaft 5 rotates, the gear teeth 9a of the transmission gear 9 and the gear teeth 13c of the transmission gear 13 corresponding to the transmission gear 9 mesh with each other and rotate with each other. Then, the sleeve 10 is displaced on the shaft of the main shaft 3 in accordance with the number of shift speeds to connect the corresponding transmission gear 9 and the main shaft 3, and the rotational force of the countershaft 5 is transmitted to the output shaft 4 via the main shaft 3. It is transmitted.

Here, the lower half of the transmission gear 13 (12) is immersed in the lubricating oil OL stored in the storage space 15. Therefore, the transmission gear 13 (12) scrapes the lubricating oil OL as it is along with its rotation, and supplies the scraped-up lubricating oil OL1 mainly to the transmission gear 9 (8) engaged with each other. The lubricant oil OL1 includes one that adheres to the gear teeth 9a (8a) of the transmission gear 9 (8) while adhering to the gear teeth 13c (12c) by surface tension.

On the other hand, for the transmission gear 9 (8) and the transmission gear 13 (12), for example, part of the lubricating oil OL2 of the lubricating oil OL1 scraped up by the transmission gear 13 (12) is used as the transmission gear 9 (8). In some cases, it may be directed to the opposite case wall face in the radial direction as it is. Further, on the downstream side in the rotational direction where the transmission gear 9 (8) and the transmission gear 13 (12) are meshed, the lubricating oil OL3 splashed mainly by the transmission gear 9 (8) goes directly to the case wall facing in the radial direction. There is a case. Furthermore, also on the upper end side of the transmission gear 9 (8), the lubricating oil OL4 splashed off by the transmission gear 9 (8) may be directed as it is to the case wall surface facing in the radial direction.

However, filters 20 and 21 are disposed on the case wall surfaces facing each other in the counter direction of the rotational direction, and the upper ends of transmission gear 9 (8) and transmission gear 13 (12) The upper edges of the

filters

20 and 21 disposed on the counter direction with respect to the direction of rotation in are positioned above the upper ends of the transmission gear 9 (8) and the transmission gear 13 (12). That is, the filter 20 is disposed in the counter direction to the rotation direction of the upper end of the transmission gear 9 (8) located in the upper stage, and the upper edge thereof is positioned above the upper end of the transmission gear 9 (8) . Similarly, the filter 21 is disposed in the counter direction to the rotation direction at the upper end of the lower shift gear 13 (12), and the upper edge thereof is positioned above the upper end of the shift gear 13 (12). There is.

As a result, each of the

filters

20 and 21 can efficiently collect the lubricating oil OL2 to OL4 which has jumped up (jumped up) by the transmission gear 9 (8) and the transmission gear 13 (12).

Further, since the lower ends of the

filters

20 and 21 are immersed in the lubricating oil OL, the collected lubricating oils OL2 to OL4 can be reduced to the lubricating oil OL stored in the storage space 15 while being purified (filtered) as it is . Further, in the

filters

20 and 21 in the portion immersed in the lubricating oil OL stored in the storage space 15, convection occurs due to the stirring action accompanying the rotation of the transmission gear 13 (12), and the convection cleans the lubricating oil OL. It can be (filtered).

By the way, the lubricating oil purification device for a transmission of the present disclosure is not limited to the above embodiment, and various changes may be made within the technical scope described in the claims without departing from the scope of the invention. , Including redesigned forms.

For example, the height of the filter 21 may be the same as the filter 20. Further, the material and the like of the filter 20 and the filter 21 may be made different.

This application is based on the Japanese Patent Application (Japanese Patent Application No. 2017-124456) filed on June 26, 2017, the contents of which are incorporated herein by reference.

In the present invention, the filter can be provided on the rotating body, and the filter can be efficiently disposed inside the narrow case, and the lubricating oil in which a plurality of gears jump up can be efficiently collected. It is useful for the lubricating oil purification device etc. of a transmission.

1 ... transmission 2 ... input shaft 3 ... main shaft 4 ... output shaft 5 ... counter shaft 6 ... clutch housing (case)
7 ... Transmission case (case)
8 ... Primary driven gear (rotary)
9 ... Transmission gear (rotary)
12: Primary drive gear (rotary body)
13 ... Transmission gear (rotary)
15 ... Storage space (inside the case)
20 ... filter 21 ... filter OL ... lubricating oil

Claims

A lubricating oil purification device for a transmission in which lubricating oil is stored inside the case,
A filter for purifying the lubricating oil is disposed on a case wall radially opposed to the rotating body disposed inside the case.
Transmission lubricating oil purification device.
The filter is
The lower part is immersed in the lubricating oil,
The lubricating oil purification device for a transmission according to claim 1.
The upper edge of the filter, which is disposed on the side of the upper end of the rotating body in the counter direction with respect to the direction of rotation, is positioned above the upper end of the rotating body.
The lubricating oil purification device for a transmission according to claim 1 or 2.
The rotating body includes a lower gear disposed in the lower stage and an upper gear disposed in the upper stage,
The filter includes a first filter disposed on the side of the upper end of the lower gear in the counter direction with respect to the rotational direction, and a second filter disposed opposite to the first filter. ,
The upper edge of the second filter is located above the upper end of the lower gear,
The upper edge of the first filter is located above the upper edge of the second filter and the upper end of the upper gear,
The lubricating oil purification device for a transmission according to any one of claims 1 to 3.