WO2019003971A1

WO2019003971A1 - Device for purifying lubrication oil of transmission

Info

Publication number: WO2019003971A1
Application number: PCT/JP2018/023055
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: CN110799777B; CN110799777A; JP6981060B2; JP2019006918A

Abstract

A device for purifying the lubrication oil of a transmission in which the lubrication oil is stored in the interior of a case, wherein the device comprises, in a rotating body disposed inside the case: a lubrication oil introduction unit provided on the upstream side specified according to the centrifugal force accompanying the rotation of the rotating body; a lubrication oil discharge unit provided on the downstream side specified according to the centrifugal force accompanying the rotation of the rotating body; and a filter provided in a lubrication oil purification passage from the introduction unit to the discharge unit, the filter purifying the lubrication oil.

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 arranging the filter inside a narrow case, which causes a problem such as being restricted in the arrangement place.

An object of the technology of the present disclosure is to provide a lubricating oil purification device for a transmission capable of efficiently arranging a filter inside a narrow case in order to solve the problems as described above.

The technique of the present disclosure is a lubricating oil purification device for a transmission in which lubricating oil is stored in the case to achieve the above object, and the rotating body disposed in the case rotates the rotating body. An introducing part of the lubricating oil provided on the upstream side defined by the accompanying centrifugal force, a discharge part of the lubricating oil provided on the downstream side defined by the centrifugal force accompanying the rotation of the rotating body, and a part from the introducing part And a filter provided in the lubricating oil purification path leading to the above to purify the lubricating oil.

In addition, the filter is immersed in the lubricating oil stored inside the case at least while located below the rotation trajectory, and the rotating body is located inside the case at least located above the rotation trajectory. Preferably, the filter is exposed from the stored lubricating oil and the lubricating oil is purified by the filter in the process of moving the lubricating oil from the upstream side to the downstream side of the lubricating oil purification path by centrifugal force.

Further, in the lubricating oil purification path, the introduction part and the discharge part are disposed such that the lubricating oil after purification is discharged in a direction intersecting the discharge direction in which the lubricating oil is scraped and discharged by the rotation of the rotating body. Is preferred.

Further, the introducing portion is provided at a first distance in the radial direction of the rotating body from the rotation axis of the rotating body, and the discharging portion is provided at a second distance in the radial direction of the rotating body from the rotation axis of the rotating body The second distance is preferably longer than the first distance.

Preferably, the introduction portion is provided on at least one surface side in the axial direction of the rotating body, and the discharge portion is provided on at least the other surface side in the axial direction of the rotating body.

Preferably, the introduction part is provided on one side and the other side of the rotating body, and the discharge part is provided on the one side and the other side of the rotating body.

The introduction portion is provided at a first distance in the radial direction of the rotating body from the rotation axis of the rotating body, and the filter is provided at a second distance in the radial direction of the rotating body from the rotation axis of the rotating body The distance of 2 is preferably longer than the first distance.

According to the technology of the present disclosure, the rotating body can be provided with a filter, and the filter can be efficiently disposed inside the narrow case.

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 first embodiment is applied. FIG. 3 is a cross-sectional view of a gear applied to the lubricating oil purification device for a transmission according to the first embodiment. FIG. 4 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 second embodiment is applied. FIG. 5 is a cross-sectional view of a gear applied to a lubricating oil purification device for a transmission according to a second embodiment. FIG. 6 is a schematic cross-sectional view of the transmission along the line AA in FIG. 1 to which the lubricating oil purification device for the transmission according to the third embodiment is applied. FIG. 7 is a cross-sectional view of a countershaft applied to a lubricating oil purification device for a transmission according to a third embodiment. FIG. 8A shows a countershaft bearing applied to a lubricating oil purification apparatus for a transmission according to a fourth embodiment, and is a cross-sectional view of an essential part of an example in which a filter is disposed inside a lubricating oil purification path. FIG. 8B is a cross-sectional view of a main part of an example in which a filter is disposed at the outlet of the lubricating oil purification path in the countershaft bearing according to the fourth embodiment shown in FIG. 8A.

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.

First Embodiment
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 are housed in a fluid-tight state by joining the flange portion 6a at the output side end of the clutch housing 6 and the flange portion 7a at the input side end of the transmission case 7 The space 15 is formed.

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.

When the primary drive gear 12 and the transmission gear 13 rotate, the lubricating oil OL can be scraped up by the rotation, and the lubricating oil OL can be supplied also to the driven gear group 11 including the primary driven gear 8 and the transmission gear 9. .

The clutch housing 6 rotatably supports the vicinity of the output end of the input shaft 2 and the input end of the countershaft 5 on the input side of the flange portion 6a, and partitions the input side of the storage space 15 Together. 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 / or the primary drive gear 12), for example, a through hole 13b (12b) through which the countershaft 5 penetrates at the center of the substantially disk-like gear main body 13a (12a). It is formed. In addition, gear teeth 13c (12c) are formed on the outer peripheral surface of the gear main body 13a (12a). Furthermore, lightening parts 13d (12d) are formed at a plurality of locations near the outer periphery of the gear main body 13a (12a).

The gear teeth 13c (12c) are engaged with the gear teeth 9a (8a) formed on the outer peripheral surface of the transmission gear 9 (and / or 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.

The thinned portion 13d (12d) is formed with an appropriate size and number depending on the gear characteristics such as the diameter (gear ratio) and thickness of the transmission gear 13 (12). Therefore, in the illustrated example, although five points are provided at the radial equal positions centering on the axis of the countershaft 5, the number and the size thereof are not limited. The lightening portion 13d (12d) may be formed in the transmission gear 9 (8) as required.

As shown in FIG. 3, the lightening portion 13d (12d) is formed on the front and back of the gear main body 13a (12a), and opens on each surface and is a transmission gear 13 (and / or primary drive gear) as a rotating body. The corner | angular part in alignment with the radial direction (and circumferential direction) of 12) has the bottom face formed in cross-sectional R shape. A filter 20 is provided inside the outer peripheral side of each lightening portion 13d (12d).

As a result, the lightening portion 13d (12d) of the transmission gear 13 (and / or the primary drive gear 12) as a rotating body is located on the upstream side defined by the centrifugal force accompanying the rotation of the transmission gear 13 (12). Specified by the introduction portion 13e (12e) of the lubricating oil OL including the portion whose bottom surface shape along the radial direction on the circumferential side (first distance in the radial direction from the rotation axis) has a R-shaped cross section, and the centrifugal force accompanying rotation. The bottom shape along the radial direction includes an R-shaped cross-section on the outer peripheral side which is the downstream side (second distance in the radial direction from the rotation axis, where the second distance is longer than the first distance) The lubricant oil OL discharge portion 13f (12f) is formed. Therefore, the lightening portion 13d (12d) includes the lubricating oil purification path 13g (12g) extending from the introduction portion 13e (12e) to the discharge portion 13f (12f).

The filter 20 is provided near the outer periphery, which is the downstream side of the lubricating oil purification path 13g (12g) from the introduction part 13e (12e) to the discharge part 13f (12f), and can purify the lubricating oil OL. Thereby, the lubricating oil purification path 13g (12g) and the filter 20 are provided without providing a special filter holding member or the like by utilizing the lightening portion 13d (12d) of the transmission gear 13 (and / or the primary drive gear 12). Can constitute a lubricating oil purification device. In the case where the introduction portion 13e (12e) is provided at a first distance in the radial direction from the rotation axis of the transmission gear 13 (and / or the primary drive gear 12) as the rotating body, the filter 20 is the first It may be provided at a second distance longer than the distance.

The filter 20 is a substance capable of absorbing water and absorbing and filtering impurities contained in the lubricating oil OL. For example, a foam such as a sponge, a filter assembly incorporating a felt-like filter, polytetrafluoroethylene A filter assembly or the like coated with a non-reactive material including (PTFE) or the like can 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 for the transmission 1 according to the present embodiment is provided in the narrow storage space 15 by directly providing the filter 20 on the transmission gear 13 (and / or the primary drive gear 12) which is a rotating body. The filter 20 can be arranged efficiently. Specifically, it is a lubricating oil purification device for a transmission 1 in which the lubricating oil OL is stored in the storage space 15, and the transmission gear 13 (and the primary drive gear 12) disposed in the storage space 15 (12) to the downstream side defined by the centrifugal force accompanying the rotation of the transmission gear 13 (12) and the introduction portion 13e (12e) of the lubricating oil OL provided on the upstream side defined by the centrifugal force accompanying the rotation of (12) A filter 20 is provided in the lubricating oil cleaning path 13g (12g) extending from the introducing portion 13e (12e) to the discharging portion 13f (12f) provided for the lubricating oil OL to clean the lubricating oil OL. And.

Next, the operation of the lubricating oil purification device of the transmission 1 according to the first embodiment 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, when the transmission gear 13 (12) is positioned at least below the rotation locus, the filter 20 is immersed in the lubricating oil OL stored in the storage space 15, and the lubricating oil OL is absorbed by the water absorption characteristics of the filter 20. (Oil absorption)

As a result, the transmission gear 13 (12) is rotated, and the filter 20 is exposed from the lubricating oil OL stored in the storage space 15 when at least above the rotation trajectory.

The lubricating oil OL absorbed and absorbed (absorbed by the filter 20) by the centrifugal force accompanying this rotation is cleaned in the process of moving the inside of the filter 20 along the bottom surface shape of the discharge portion 13f (12f). Discharged as

Furthermore, it adheres or leads to a part of the lubricating oil attached to the surface of the transmission gear 13 (12) or the bottom surface of the lightening portion 13d (12d), that is, the introduction portion 13e (12e) of the lubricating oil purification path 13g (12g). Lubricant oil OL2 is newly absorbed (absorbed) to the filter 20 by centrifugal force accompanying rotation, and is purified in the process of moving inside the filter 20 along the bottom surface shape of the discharge part 13f (12f) It is discharged as OL3.

Thus, the lubricating oil purification device of the transmission 1 filters the lubricating oil OL, OL2 absorbed (absorbed) by the filter 20 directly or by centrifugal force at the time of rotation, into the filter 20 along the lubricating oil purification path 13g (12g). In the process of passing through, it is discharged in a purified state, and is reduced to the lubricating oil OL stored in the storage space 15.

Thus, the lubricating oil OL stored in the storage space 15 is purified (filtered) while being stirred by the rotation of the transmission gear 13 (12).

Here, the lubricating oil purification path 13g (12g) is in the discharge direction in which the lubricating oil OL is discharged as the scraped-up lubricating oil OL1 by the rotation of the transmission gear 13 (12), that is, in the axial direction intersecting the radial direction. The introductory part 13e (12e) and the discharge part 13f (12f) are arrange | positioned so that lubricating oil OL after purification | cleaning may be discharged | emitted so that it may be followed.

As a result, the lubricant oil OL1 supplied to the transmission gear 9 (8) and the lubricant oil OL3 purified and reduced to the lubricant oil OL stored in the storage space 15 can be made independent and stored in the storage space 15 It is possible to effectively purify the lubricant oil OL.

Second Embodiment
4 and 5 show a second embodiment. Hereinafter, the same components as those of the lubricating oil purification device of transmission 1 described based on FIGS. 1 to 3 described above are denoted by the same reference numerals, and detailed descriptions thereof will be omitted, and only specific components will be described. explain.

The transmission gear 13 (12) shown in the second embodiment includes a substantially disk-shaped gear main body 13a (12a) and a through hole 13b (12b) formed at the center of the gear main body 13a (12a) and through which the countershaft 5 passes. , Gear teeth 13c (12c) meshed with the gear teeth 9a (8a) of the transmission gear 9 (8), and lightened portions 13d (12d) formed on both sides of the outer periphery of the gear body 13a (12a). And.

The thinned portion 13d (12d) is formed with an appropriate size and number depending on the gear characteristics such as the diameter (gear ratio) and thickness of the transmission gear 13 (12).

As shown in FIG. 5, the lightening parts 13 d (12 d) are formed on the front and back of the gear main body 13 a (12 a), and open at each surface and the corner along the radial direction (and circumferential direction) has a cross section R It has a bottom surface formed in a shape. Guide holes 13h (12h) are formed on the bottom surface of each of the lightening parts 13d (12d) so as to be inclined from the inner peripheral side on one side to the outer peripheral side on the other side. A filter 20 is provided in the guide hole 13h (12h).

Thereby, the lightening portion 13d (12d) of the transmission gear 13 (and / or the primary drive gear 12) as a rotating body is defined on one side by the upstream side defined by the centrifugal force accompanying the rotation of the transmission gear 13 (12). And the introduction portion 13e (12e) of the lubricating oil OL including a portion whose bottom surface shape along the radial direction is R-shaped on the inner peripheral side, and the centrifugal force accompanying the rotation of the transmission gear 13 (12) on the other side. A discharge portion 13f (12f) of the lubricating oil OL including a portion having a R-shaped cross section in the bottom surface along the radial direction is formed on the outer peripheral side which is the downstream side defined by the above. Therefore, the lightening portion 13d (12d) is a lubricating oil purification path 13i (12i) from the introduction portion 13e (12e) on one side to the discharge portion 13f (12f) on the other side via the guide hole 13h (12h). ) Will be provided.

The filter 20 is disposed in the middle of the lubricating oil purification path 13i (12i) from the introduction part 13e (12e) on one side to the discharge part 13f (12f) on the other side via the guide hole 13h (12h). The lubricating oil OL can be cleaned by being provided in a certain guide hole 13h (12h). Thereby, the lubricating oil purification path 13i (12i) and the filter 20 are provided without providing a special filter holding member or the like by utilizing the lightening portion 13d (12d) of the transmission gear 13 (and / or the primary drive gear 12). Can constitute a lubricating oil purification device.

In the above configuration, 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.

Then, the lubricating oil OL absorbed (absorbed oil) by the filter 20 by the centrifugal force accompanying this rotation is along the guide hole 13h (12h) which is inclined from the inner peripheral side on one side to the outer peripheral side on the other side. In the process of moving inside the filter 20, it is discharged as the purified lubricating oil OL3.

Furthermore, it adheres or leads to a part of the lubricating oil adhering to the surface of the transmission gear 13 (12) or the bottom surface of the lightening portion 13d (12d), that is, the introducing portion 13e (12e) of the lubricating oil purification path 13i (12i). The lubricant oil OL2 is absorbed (absorbed) by the filter 20 by the centrifugal force accompanying the rotation, and along the guide hole 13h (12h) inclined from the inner peripheral side on one side to the outer peripheral side on the other side. In the process of moving inside the filter 20, it is discharged as the purified lubricating oil OL3.

Thus, the lubricating oil purification device of the transmission 1 filters the lubricating oil OL, OL2 absorbed (absorbed) by the filter 20 directly or by centrifugal force at the time of rotation, into the filter 20 along the lubricating oil purification path 13i (12i). In the process of passing through, it is discharged in a purified state, and is reduced to the lubricating oil OL stored in the storage space 15.

Here, the lubricating oil purification path 13i (12i) is in the discharge direction in which the lubricating oil OL is discharged as the lubricant OL scraped up by the rotation of the transmission gear 13 (12), that is, in the axial direction intersecting with the radial direction. The introductory part 13e (12e) and the discharge part 13f (12f) are arrange | positioned so that lubricating oil OL after purification | cleaning may be discharged | emitted so that it may be followed.

Third Embodiment
6 and 7 show a third embodiment. Hereinafter, the same components as those of the lubricating oil purification device of transmission 1 described based on FIGS. 1 to 3 described above are denoted by the same reference numerals, and detailed descriptions thereof will be omitted, and only specific components will be described. explain.

In the counter shaft 5 shown in the third embodiment, an axial through hole 5a penetrating along the axial direction and a radial direction such that one end communicates with the axial through hole 5a and the other end opens in the outer peripheral surface One or more radial through holes 5 b extending along the same are formed. The radial through holes 5 b can be disposed at positions not blocked by the transmission gear 13 at a plurality of locations along the axial direction. Furthermore, when the radial through holes 5 b are arranged at a plurality of locations along the axial direction, they can be arranged with different phases or numbers in the radial direction. Moreover, the filter 20 is provided in this radial through hole 5b.

Thereby, the counter shaft 5 as a rotating body is an open end (released to the peripheral wall surface of the radial through hole 5b from an open end (introduction portion) opened to the axial end face (one end or both ends) of the axial through hole 5a. The lubricating oil purification path 5c of the lubricating oil OL reaching the part.

The filter 20 is provided in the middle of the lubricating oil purification path 5c from the axial through hole 5a (and the radial through hole 5b immersed in the lubricating oil OL) to the opening end of the radial through hole 5b. It can clean up OL. Thereby, the lubricating oil purification device can be configured by the lubricating oil purification path 5 c and the filter 20 without providing a special filter holding member or the like by using the countershaft 5.

In the above configuration, the countershaft 5 is immersed in the lower half of the lubricating oil OL stored in the storage space 15. Therefore, the countershaft 5 can suck in the lubricating oil OL from the axial through hole 5a and the radial through hole 5b along with its rotation, and at least in the storage space 15 when it is positioned below the rotational trajectory. The filter 20 is immersed in the stored lubricating oil OL, and the lubricating oil OL is absorbed (absorbed) by the water absorption characteristic of the filter 20.

Thereby, the countershaft 5 is rotated, and the filter 20 is exposed from the lubricating oil OL stored in the storage space 15 when the countershaft 5 is positioned at least above the rotational trajectory.

The lubricating oil OL absorbed (absorbed) by the filter 20 is discharged as the cleaned lubricating oil OL3 in the process of moving inside the filter 20 along the radial through holes 5b by the centrifugal force accompanying this rotation.

As described above, the lubricating oil purification device of the transmission 1 discharges and stores the lubricating oil OL absorbed (absorbed) by the filter 20 in the process of passing through the filter 20 along the lubricating oil purification path 5c. The lubricant oil OL stored in the space 15 is reduced.

Fourth Embodiment
FIG. 8A shows a fourth embodiment. Hereinafter, the same components as those of the lubricating oil purification device of transmission 1 described based on FIGS. 1 to 3 described above are denoted by the same reference numerals, and detailed descriptions thereof will be omitted, and only specific components will be described. explain.

The bearing 17 (19) of the countershaft 5 shown in the fourth embodiment is assembled to the partition wall 6b (7b) to form a raceway surface 22a on which rolling elements 21 formed of a plurality of balls (or rollers) roll. The ring-shaped stationary side race 22 is provided, and the annular rotating side race 23 is formed on the countershaft 5 and has a raceway surface 23a on which a plurality of rollers roll.

The fixed side race 22 functions as an outer ring fixed to the bearing 17 (19), and the rotating side race 23 functions as an inner ring fixed to the counter shaft 5 and rotated integrally with the counter shaft 5.

The raceway surface 22a of the fixed side race 22 and the raceway surface 23a of the rotation side race 23 are parallel to each other with an interval, and are inclined from the inner peripheral side (rotation side) toward the outer peripheral side (fixed side) A gap 24 extending in a direction intersecting the axial direction of the countershaft 5 with the rolling element 21 interposed therebetween is formed.

The gap 24 forms a lubricating oil purification path 25 having an opening at the inner peripheral side as the introduction portion and an opening at the outer peripheral side as the discharge portion. A filter 20 fixed to the rotation side race 23 is provided on the outer peripheral side of the rolling element 21 of the lubricating oil purification path 25. The filter 20 is annularly formed.

As a result, the bearing 17 (19) as a rotating body cleans the lubricating oil from the open end (introduction portion) on the inner peripheral side of the gap 24 to the open end (discharge portion) on the outer peripheral side of the gap 24 The path 25 will be provided.

The filter 20 is provided in the gap 24 immersed in the lubricating oil OL, and can clean the lubricating oil OL. Thereby, the lubricating oil purification device can be configured by the lubricating oil purification path 25 and the filter 20 without providing a special filter holding member or the like by using the bearing 17 (19).

In the above configuration, the lower half of the bearing 17 (19) is immersed in the lubricating oil OL stored in the storage space 15. Therefore, the lubricating oil OL can be sucked from the gap 24 with the rotation of the countershaft 5, and the filter 20 is immersed in the lubricating oil OL stored in the storage space 15 while being positioned at least below the rotation trajectory. The lubricating oil OL is absorbed (absorbed) by the water absorption characteristics of the filter 20.

Thereby, the annular rotation side race 23 and the filter 20 are integrally rotated with the counter shaft 5, and the filter 20 is exposed from the lubricating oil OL stored in the storage space 15 when at least above the rotation locus. Be done.

Then, due to the centrifugal force accompanying this rotation, the lubricating oil OL absorbed (absorbed) by the filter 20 is discharged as the lubricating oil OL3 purified in the process of moving inside the filter 20 along the gap 24.

The filter 20 may be fixed to the end face of the countershaft 5 or the rotation side race 23 so as to close the discharge portion side of the gap 24 as shown in FIG. 8B.

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 filter 20 shown in the second embodiment may be an oblique through hole penetrating to the front and back of the gear main body 13a (12a) at a portion where the lightening portion 13d (12d) is not formed. Further, the axial through hole 5a shown in the third embodiment may be omitted. Furthermore, it is also possible to combine at least one of the configurations shown in the third embodiment and the fourth embodiment with the configuration shown in the first embodiment or the second embodiment.

This application is based on the Japanese Patent Application (Japanese Patent Application No. 2017-124454) filed on June 26, 2017, the contents of which are incorporated herein by reference.

The present invention has the effect that a filter can be provided on the rotating body, and the filter can be efficiently arranged inside a narrow case, and is useful for a lubricating oil purification device of a transmission, etc.

1 ... transmission 2 ... input shaft 3 ... main shaft 4 ... output shaft 5 ... counter shaft 5 c ... lubricating oil purification path 6 ... clutch housing (case)
7 ... Transmission case (case)
10 ... sleeve 11 ... driven gear group 12 ... primary drive gear (rotary body)
13 ... Transmission gear (rotary)
13 g ... lubricating oil purification path 15 ... storage space (inside of the case)
16 ... bearing 17 ... bearing 19 ... bearing 20 ... filter OL ... lubricating oil

Claims

A lubricating oil purification device for a transmission in which lubricating oil is stored inside the case,
The rotating body disposed inside the case,
An inlet of the lubricating oil provided on the upstream side defined by a centrifugal force accompanying the rotation of the rotating body;
A discharge unit for the lubricating oil provided on the downstream side defined by the centrifugal force accompanying the rotation of the rotating body;
A filter provided in a lubricating oil purification path from the introduction part to the discharge part to purify the lubricating oil;
Lubricating oil purification device for a transmission provided with:
The rotating body is
The filter is immersed in the lubricating oil stored inside the case at least while being located below the rotational trajectory,
The filter is exposed from the lubricating oil stored in the case at least while located above the rotational trajectory, and the lubricating oil is further from the upstream side to the downstream side of the lubricating oil purification path by centrifugal force. The lubricating oil is purified by the filter in the process of
The lubricating oil purification device for a transmission according to claim 1.
The lubricating oil purification path is
The introduction portion and the discharge portion are disposed such that the lubricating oil after purification is discharged in a direction intersecting a discharge direction in which the lubricating oil is scraped and discharged by the rotation of the rotating body.
The lubricating oil purification device for a transmission according to claim 2.
The introduction portion is provided at a first distance in a radial direction of the rotating body from an axis of rotation of the rotating body,
The discharge unit is provided at a second distance in the radial direction of the rotating body from the rotation axis of the rotating body, and the second distance is longer than the first distance.
The lubricating oil purification device for a transmission according to any one of claims 1 to 3.
The introduction portion is provided on at least one surface side in the axial direction of the rotating body,
The discharge unit is provided on at least the other surface side in the axial direction of the rotating body.
The lubricating oil purification device for a transmission according to any one of claims 1 to 4.
The introduction unit is provided on the one surface side and the other surface side of the rotating body,
The discharge unit is provided on the one surface side and the other surface side of the rotating body,
The lubricating oil purification device for a transmission according to claim 5.
The introduction portion is provided at a first distance in a radial direction of the rotating body from an axis of rotation of the rotating body,
The filter is provided at a second distance in a radial direction of the rotating body from the rotation axis of the rotating body, and the second distance is longer than the first distance.
The lubricating oil purification device for a transmission according to any one of claims 1 to 3.