JPS6317890Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a lubrication mechanism for an automobile transmission.
In particular, a shaft that rotatably supports a rotating member such as a transmission gear on the outer periphery of an intermediate portion is assembled at one end to a rolling bearing that is assembled into a recess in a casing that accommodates a required amount of lubricating oil. The present invention relates to a lubrication mechanism in which lubricating oil is supplied to the shaft support of the rotating member and the rolling bearing in an automobile transmission in which a cavity is formed in the recess.

In this type of lubrication mechanism,
Publication No. 142456, Japanese Unexamined Patent Publication No. 100463, Publication No. 1983
As seen in Publication No. 37786, the lubricating oil that is splashed inside the casing and falls into the void from above the void flows into the shaft through an oil guide provided in the void. The oil is guided into an axially extending oil hole provided in the shaft center, and is further supplied to the shaft support of the rotating member through a radial oil hole provided in the middle part of the shaft, and falls into the cavity. A configuration is adopted in which a portion of the lubricating oil is supplied to the rolling bearing. However, in the conventionally proposed lubrication mechanisms, the distribution of the amount of oil supplied to the shaft support of the rotating member and the amount of oil supplied to the rolling bearing is not considered, and there is not enough oil for either one. amount of lubricating oil is supplied, but the other side is not supplied with a sufficient amount of lubricating oil. Therefore, on the other hand, problems such as poor lubricity occur.

The present invention has been devised to deal with such problems, and one embodiment thereof will be described below based on the drawings. FIG. 1 schematically shows a parallel two-shaft transaxle for an automobile that is integrally equipped with a gear transmission and a final reduction gear.
It consists of a mission case 12 and a case cover 13. The transaxle case 11 is attached to a transverse engine (specifically, an engine block) of which only the crankshaft 90 is shown on the right side of the drawing, and a clutch device 20 is housed between the engine and the transaxle case 11. Ru. The transmission case 12 is liquid-tightly assembled to the transaxle case 11 on the right side in the drawing, and a final drive kit 30 consisting of a pair of gears is located below the transaxle case 11 and the transmission case 12 in the drawing. A differential gear unit 40 is accommodated offset in the clutch device 20. The case cover 13 is fluid-tightly attached to the transmission case 12 on the right side in the drawing, and is attached to the transmission case 12 on the right side in the drawing.
1, Mission case 12 and case cover 13
In between, an input shaft 50 is arranged coaxially with the clutch device 20, and an output shaft 60 is arranged parallel to the input shaft 50.

The input shaft 50 is rotatably supported by being attached to a roller bearing B1 attached to a bearing retainer 14 (as shown in FIG. 2, attached to the transaxle case ₁₁ ). At the same time, the _first
Speed drive gear 51, reverse drive gear 5
2, integrally equipped with a second speed drive gear 53, and third speed to fifth speed drive gears 54,5
5 and 56 are rotatably supported. The input shaft 50 also includes a synchronized mesh device 57 for 3rd and 4th speeds and a synchronized mesh device 5 for 5th speed.
8 is assembled. Output shaft 6
0 is the recess 11a of the transaxle case 11
It is assembled and rotatably supported by a roller bearing B ₃ assembled into the transmission case 12, and is rotatably supported by a ball bearing B ₄ assembled into the transmission case 12, and is mounted on one side of the final drive kit 30. A pinion gear 31, which is a gear, is integrally provided, and a first speed driven gear 61 and a second speed driven gear 62 are rotatably supported. Further, a synchromesh device 63 for 1st and 2nd speeds equipped with a reverse driven gear 63a is assembled to the output shaft 60, and torque can be transmitted to a 3rd speed driven gear 64, a 4th speed driven gear 65, and a 5th speed driven gear 66. It is assembled into. A ring gear 32, which is the other gear of the final drive kit 30, is fixed to a case 41 of a differential gear unit 40, and is constantly meshed with the pinion gear 31. The lower part of the ring gear 32 is constantly immersed in a required amount of lubricating oil (the liquid level when stationary is shown by a phantom line in FIG. 2) injected into the casing 10.

However, in this transaxle,
By assembling the output shaft 60 into the roller bearing _B3 assembled into the recess 11a of the transaxle case 11, a cavity R is formed in the recess 11a. Above this space R, as shown in FIGS. 2 and 3, oil pans O ₁ and O ₂ are formed, and these oil pans O ₁ and O ₂ are connected to through holes 11c and 11 formed in the transaxle case 11.
It is connected to the space R by d. Furthermore, an oil guide 70 is provided in the space R, as shown in FIGS. 1 and 3.

In the oil guide 70, the lubricating oil fills the cavity R.
A disk-shaped partition wall 7 partitions into a first chamber R ₁ where the falling inflow from O 1 and O ₂ is stored _{, and a second chamber R 2 which} communicates with the inside of the casing 10 through a bearing B ₃ .
1, and an oil hole 60 integrally protruding from this and having a tip 72a located at the axis of the output shaft 60.
a pipe section 72 that fits into the oil hole 60a and communicates the oil hole 60a with the first chamber _{R1 ;}
and a first communication hole 73 that communicates with the second chamber _R2 , and a partition wall 71 at a position above the first communication hole 73.
A notch provided in the transaxle case 11 is provided with a second communication hole 74 bored in the hole to communicate the first chamber R ₁ and the second chamber R ₂ , and a protrusion 71 a provided at the lower peripheral edge of the partition wall portion 71 . 11e, and is held between the transaxle case 11 and the bearing _B3 . (See Fig. 4) Also, in this transaxle, an oil hole 60a provided at the axis of the output shaft 60 passes through the shaft 60, and radial oil holes 60b, 60c are perpendicular to the oil hole 60a. ,60d,6
0e, 60f, and 60g are drilled. Among these oil holes 60b to 60g, oil holes 60b and 60c
are provided corresponding to the shaft portions of the first speed driven gear 61 and the second speed driven gear 62, respectively, and oil holes 60d to 60g are provided corresponding to locations where lubricating oil is required. In addition, the right end of the oil hole 60a in the figure allows air to bleed from the oil hole 60a in order to prevent the lubricating oil that has flowed into the oil hole 60a from flowing out and to improve the flow of the lubricating oil to the oil holes 60b to 60g. A restricting member 67 is fitted to the left end of the oil hole 60a in the drawing to prevent the lubricating oil that has flowed into the oil hole 60a from flowing out and to improve the flow of the lubricating oil to the left side of the oil hole 60a. A throttle member 68 is fitted that allows air to be removed from the oil hole 60a.

In this embodiment configured in this manner, when the output shaft 60 rotates, lubricating oil is splashed onto the upper inner wall of the casing 10 mainly by the ring gear 32 that rotates while meshing with the pinion gear 31, and the oil pan O ₁ , Enter O ₂ and open through hole 11c, 1
1d, it sequentially falls into the first chamber _R1 and is stored in the first chamber _R1 . The liquid level of the lubricating oil stored in this first chamber R ₁ is
2, the lubricating oil is guided into the oil hole 60a of the output shaft 60 through the pipe portion 72, and this further flows inside the oil hole 60a to the left in FIG. The lubricating oil reaches the outer periphery of the output shaft 60 by centrifugal force through the holes 60b to 60g, and is supplied to the shaft supports of both driven gears 61 and 62 as well as to necessary locations on the output shaft 60.

Therefore, since the lubricating oil stored in the first chamber _R1 is guided into the oil hole 60a through the pipe portion 72, all of the lubricating oil does not flow into the oil hole 60a and is stored in the first chamber _R1. The liquid level of the lubricating oil reaches the height of the first communication hole 73 of the oil guide 70. If this happens, the lubricating oil stored in the first chamber R1 will flow into the second chamber _R2 through the first communication hole 73, and the lubricating oil stored in the first chamber R1 will flow into the second chamber _R2 through the first communication hole ₇₃ , and the
After passing through and lubricating the roller bearing _B3 , it flows down to the bottom of the casing 10. By the way, pipe section 7
An amount of lubricating oil larger than the sum of the amount of lubricating oil guided into the oil hole 60a through O 2 and the amount of lubricating oil flowing into the second chamber R ₂ through the first communication hole 73 flows into both oil pans O ₁ ，
When the lubricating oil flows from O ₂ into the first chamber R ₁ , the second communication hole 74 functions as an air vent hole and releases the air in the upper part of the first chamber R ₁ to the second chamber R ₂ . The lubricating oil flows smoothly into the first chamber _R1 , and the liquid level of the lubricating oil reaches the height of the imaginary line in FIG. 3, that is, the height of the second communicating hole 74. If this happens, the amount of lubricating oil guided into the oil hole 60a through the pipe portion 72 and the first communicating hole will be lower than when the liquid level of the lubricating oil is at the height of the first communicating hole 73. 2nd chamber through hole 73
The amount of lubricating oil flowing into R ₂ increases respectively. Note that when the liquid level of the lubricating oil rises above the virtual line in FIG. 3, the lubricating oil also flows into the second chamber _R2 through the second communication hole 74.

As described above, in this embodiment, the oil guide 70 including the partition wall part 71, the pipe part 72, the first communication hole 73, and the second communication hole 74 is adopted,
While supplying lubricating oil to the shaft parts of both driven gears 61 and 62 through the pipe section 72,
Since the lubricating oil is distributed and supplied to B ₃ through at least the first communication hole 73, the lubricating oil can be optimally distributed and supplied to both, and the lubricity of both can be improved. In addition, in this embodiment, the second
The communication hole 74 functions as an air vent hole, and the first chamber
When the liquid level of the lubricating oil in R ₁ reaches the height of the imaginary line in FIG. 3, both the amount of lubricating oil supplied through the pipe portion 72 and the amount of lubricating oil supplied through the first communication hole 73 increase. However, the lubricity in both cases is improved.

In addition, in the above embodiment, the oil guide 7
A pair of upper and lower communication holes 73 and 74 are provided in the partition wall 71 of 0.
Although a suitable positional difference (difference in communicating positions) is provided in the vertical direction by drilling holes 73 and 74, it is of course possible to provide a plurality of communicating holes 73 and 74 when implementing the present invention. In particular, as shown in FIGS. 5 to 7, an appropriate positional difference may be given to the communicating holes in the vertical direction. In the oil guide 170 shown in FIG.
An oblong communication hole 175 extending in the vertical direction is bored in the partition wall 171 at a higher position.
In the oil guide 270 shown in FIG.
The partition wall portion 271 is located above the pipe portion 272.
An arcuate communication hole 276 extending in the circumferential direction is bored in the circumferential direction. In the oil guides 170, 270 shown in FIGS. 5 and 6, the communication holes 175, 2
The upper portion of 76 functions as an air vent hole. In the oil guide 370 shown in FIG. 7, a pipe-shaped communication hole 377 and a communication hole 374 are provided in the partition wall part 371 at a position above the pipe part 372.

Further, the present invention is not limited to the above-mentioned embodiments, and the shaft that rotatably supports a rotating member such as a transmission gear on the outer periphery of the intermediate portion is assembled at one end into a recess in a casing that accommodates a required amount of lubricating oil. A cavity is formed in the recess when assembled to the rolling bearing, and the lubricating oil that is splashed in the casing and falls into the cavity from above the cavity is the oil provided in the cavity. The oil is guided by a guide into an axially extending oil hole provided at the axis of the shaft, and is further supplied to the shaft support of the rotating member through a radial oil hole provided at the intermediate portion of the shaft,
The present invention can be similarly applied to various lubrication mechanisms for automobile transmissions in which a portion of the lubricating oil that falls into the cavity is supplied to the rolling bearing.

In short, in the present invention, in the lubrication mechanisms of the various automobile transmissions described above, the oil guide serves as the casing through the first chamber in which the lubricating oil falls from above and is stored in the cavity and the rolling bearing. a partition wall portion that partitions into a second chamber that communicates with the interior; and a partition wall portion integrally protruding from the partition wall portion whose tip fits into an oil hole provided at the axis of the shaft to connect the oil hole and the first chamber. A pipe section for communication,
An oil guide is provided with a communication hole bored in the partition wall at a position above the pipe section to communicate the first chamber and the second chamber, and the communication hole of the oil guide is arranged in the vertical direction. The oil guide is characterized by being bored in the oil guide so as to have an appropriate positional difference. As a result, while lubricating oil is supplied to the shaft support of rotating members such as transmission gears through the pipe section, lubricating oil to the roller bearings can be distributed and supplied through the communication hole, and lubricating oil can be optimally distributed and supplied to both. Both lubricity can be improved. In addition, in the present invention, the communication hole has an appropriate positional difference in the vertical direction, so that when lubricating oil flows into the first chamber, the upper part of the communication hole functions as an air vent hole and flows into the upper part of the first chamber. Since some air is released into the second chamber, the lubricating oil can smoothly flow into the first chamber and its liquid level can be raised, and the amount of lubricating oil supplied to both of the above-mentioned chambers can be increased.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram along the line shown in FIG.
The figure is a partial left side view of the transaxle case shown in Figure 1, Figure 3 is an enlarged sectional view along the line of Figure 2 in the assembled state, Figure 4 is a perspective view of the oil guide, Figure 5, FIGS. 6 and 7 are perspective views showing modified examples of the oil guide. Explanation of symbols, 10...Casing, 11...Transaxle case, 11a...Recess, 60...
...output shaft, 60a...oil hole extending in the axial direction, 60b, 60c...oil hole in the radial direction,
61, 62...Driven gear, 70...Oil guide, 71...Dividing wall portion, 72...Pipe portion, 7
3...First communication hole, 74...Second communication hole, _B3 ...
...Rolling bearing, R...Vacancy, R ₁ ...First chamber,
R ₂ ...Second room.

Claims (1)

[Scope of utility model registration request] A shaft that rotatably supports a rotating member such as a transmission gear on the outer periphery of an intermediate portion is attached at one end to a rolling bearing that is assembled into a recess in a casing that accommodates a required amount of lubricating oil, and is inserted into the recess. A cavity is formed, and the lubricating oil that is splashed in the casing and falls into the cavity from above the cavity is passed through an oil guide provided in the cavity and provided at the axis of the shaft. Part of the lubricating oil that is guided into the axially extending oil hole, is further supplied to the shaft support of the rotating member through the radial oil hole provided in the middle part of the shaft, and falls and flows into the cavity. In the lubrication mechanism for an automobile transmission, the lubricating oil is supplied to the rolling bearing through a first chamber in which the lubricating oil falls from above and is stored in the space as the oil guide, and passes through the rolling bearing. a partition wall portion that partitions into a second chamber that communicates with the inside of the casing; and a partition wall portion that is integrally protruded from the partition wall portion and whose tip fits into an oil hole provided at the axis of the shaft, and which connects the oil hole and the first chamber. an oil guide including a pipe portion that communicates with the first chamber and a communication hole that is bored in the partition wall at a position above the pipe portion and communicates the first chamber with the second chamber; A lubrication mechanism for an automobile transmission, characterized in that communication holes are formed in an oil guide so as to have an appropriate positional difference in the vertical direction.