JPH11247977A - Bearing lubricating structure for transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lubricate a support part of a counter shaft with a simple structure. SOLUTION: An oil discharge port 36 is opened at the upper end of an out pump housing 5, and a first rib 40 composed of an inlet wall 41 extending along a extending direction of an oil discharge port 36 and an outlet wall 42 extending in the direction of a counter shaft, and a second rib 45 partly opposing the outlet wall 42 of the first rib 40 underneath the latter and extending in the direction of the counter shaft are formed on the end wall 8 of a converter housing 7 so as to define a guide passage for guiding oil from the oil discharge port 36 toward the center of the counter shaft. The ribs are projected toward the transmission casing, being off from the mating surfaces of the converter housing 7 and a transmission casing, and have large widths. Thereby the oil is efficiently fed into a bearing 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubrication structure for a first shaft of a transmission mechanism of an automatic transmission or the like, for example, a second shaft such as a counter shaft adjacent to a main shaft.

[0002]

2. Description of the Related Art A conventional lubrication structure for a counter shaft, for example, is shown in FIG. That is, the bearing 35 that supports one end of the counter shaft 13 is held by the end wall 51 of the converter housing 50 that houses the torque converter on the transmission case side. An oil hole 53 extending from the outer peripheral surface is formed. An oil outlet 54 formed to communicate with a discharge port of an oil pump 58 is connected to the oil hole 53 by an oil pipe 55. Thereby, the oil pump 5
The oil from 8 is supplied to a bearing 35 supporting the counter shaft 13.

[0003]

However, in the conventional countershaft lubricating structure, the oil hole 53 is formed in the converter housing 50 and the oil pipe 55 as a separate part is attached, so that the number of parts is increased. In addition to the increase in cost, a thick portion for the oil hole 53 must be provided in the end wall 51 of the converter housing, and the thick portion and the oil pipe 55
However, there is a problem that it is difficult to arrange and pipe the pipes while avoiding interference with other adjacent members. Accordingly, the present invention has been made in view of the above problems, and in a transmission including a first shaft provided with an oil pump, provides a lubricating structure for a second shaft adjacent to the first shaft with a simple structure that does not require an oil pipe. The purpose is to do.

[0004]

SUMMARY OF THE INVENTION Therefore, according to the present invention, a converter housing and a transmission case are connected, and an oil pump is provided on a first shaft in the vicinity of the connection portion, and is adjacent to an end wall of the converter housing. Second
A lubrication structure for a second shaft adjacent to a first shaft in a transmission that supports one end of the shaft, wherein an oil pump is provided with an oil discharge port that opens on a second shaft side, and an end wall of a converter housing is provided on an end wall of the converter housing. A rib for guiding oil from the oil discharge port in the second axial direction is provided. Accordingly, the oil is supplied to the support portion of the second shaft by the rib without providing the oil hole or the oil pipe dedicated to the second shaft lubrication.

It is preferable that the oil discharge port is opened at the upper end of the oil pump housing, and the rib is formed by a first rib and a second rib which are substantially opposed to each other, and forms a guide path toward the center of the second shaft. In particular, the first rib includes an inlet wall extending in the direction in which the oil discharge port extends and an outlet wall facing the second axial direction, and the second rib has an outlet wall of the first rib below the first rib. It may be formed so as to face partly in the second axial direction. Thereby, the oil from the oil discharge port is efficiently guided to the support portion of the second shaft.

The second shaft is supported by a bearing held by a bearing holding portion formed on an end wall of the converter housing. The bearing holding portion has a ring-shaped ridge on an opening edge of a concave portion for housing the bearing. The second rib can be connected to the ring jetty. Furthermore, by forming a notch in the ring-shaped jetty facing the guideway, the oil is particularly smoothly supplied to the bearing.
Furthermore, by protruding the rib toward the transmission case side from the mating surface of the converter housing and the transmission case, the oil is more reliably supplied to the bearing without waste.

[0007]

Embodiments of the present invention will be described below with reference to examples. 1 is a front view of the converter housing viewed from the transmission mechanism side, FIG. 2 is a view showing an end wall of the converter housing with a counter shaft removed, and FIG. 3 is a longitudinal section of the transmission showing the vicinity of the end wall of the converter housing. FIG. The transmission 1 has a main shaft 1 as its first shaft.
1 and a final gear 20 including a differential gear device, a counter shaft 13 as a second shaft is disposed.
The conversion of the rotation direction and the deceleration are performed on the output of the motor. In this embodiment, the counter shaft 13 is arranged at substantially the same height as the main shaft 11, as shown in FIG.

As shown in FIG. 3, an oil pump housing 4 is attached to the opening end of the transmission case 2 accommodating the transmission mechanism 10, and the oil pump housing 4 is superposed on the transmission mechanism 10 side. The oil pump 3 is formed by the oil pump cover 5 assembled with the oil pump. The transmission case 2 including the oil pump 3 is further coupled to the converter housing 7, and a storage portion for the counter shaft 13 and the final gear 20 is formed between the transmission case 2 and the end wall 8 of the converter housing 7 in addition to the transmission mechanism 10. ing.

One end of the counter shaft 13 is supported by a bearing 35 held by a bearing holding portion 30 provided on the end wall 8 of the converter housing 7, and the output gear 15 meshing with the final gear 20 in order from the bearing 35 side.
And an input gear 14 meshing with the output gear 12 of the transmission mechanism.
And The bearing holder 30 is the bearing 3
5 is provided, and the periphery of the opening of the recess slightly protrudes from the surrounding wall surface to form a ring-shaped jetty 32. The other end of the counter shaft 13 is supported by a bearing (not shown) held in the transmission case 2.

As shown in FIG. 1, an oil discharge port 36 is provided at the upper end of the oil pump housing 4 in the horizontal direction toward the counter shaft 13 side. It communicates with a discharge port (not shown). On the end wall 8 of the converter housing 7, the first rib 4 is provided at a substantially intermediate position between the oil discharge port and the center of the counter shaft 13 in the lateral extension of the oil discharge port 36.
0 is formed. The first rib 40 is composed of an inlet wall 41 extending along the extension direction of the oil discharge port 36 and an outlet wall 42 facing the counter shaft 13 direction. The oil spouting from the outlet 36 is guided toward the center of the counter shaft 13.

Further, on the same end wall 8 and below the first rib 40, a second rib 45 which faces the exit wall 42 of the first rib and is substantially parallel to the direction of the counter shaft 13 is provided. Is formed. The first rib 40 and the second rib 45 are
As shown in FIG. 4, it has a thin wall shape that rises almost perpendicularly to the end wall 8. Thus, the first rib 40 and the second rib 45 form a guide path R toward the counter shaft 13.

Also, as shown in FIG.
(And the second rib 45) are connected to the converter housing 7.
And the transmission case 2 protrudes inward of the transmission case 2 from the mating surface F thereof to form a wide wall surface. Further, the lower end of the second rib 45 is connected to the ring-shaped jetty 32 of the bearing holding unit 30,
A notch 3 is formed above the connection portion of the ring-shaped jetty 32 with the second rib 45, that is, at a portion facing the guide path R.
3 are provided.

The present embodiment is constructed as described above. The oil discharge port 36 is provided at the upper end of the oil pump housing 4, and the oil from the oil discharge port 36 is supplied to the end wall 8 of the converter housing 7 by the bearing of the counter shaft 13. Since the first and second ribs 40 and 45 forming the guide path R for guiding to the holding unit 30 are provided, the oil is efficiently supplied to the bearing 35 of the counter shaft. Further, since the notch 33 is provided in the ring-shaped ridge 32 of the bearing holding portion 30 so as to be connected to the guide path R, the guided oil is particularly smoothly guided to the bearing 35.
In the embodiment, the lubrication of the support portion of the counter shaft 13 is described as the main shaft being the first shaft and the second shaft adjacent thereto, but the adjacent shaft of the present invention is not limited to the counter shaft of the embodiment.

[0014]

As described above, the present invention relates to a lubrication structure for a second shaft adjacent to a first shaft, such as a counter shaft in a transmission, wherein an oil discharge port opened to the second shaft is provided in an oil pump. The end wall of the converter housing is provided with a rib for guiding the oil from the oil discharge port in the second axial direction. As a result, the oil is guided to the support of the second shaft, so that the oil can be supplied to the support of the second shaft with a simple structure.

The oil discharge port is opened at the upper end of the oil pump housing, and the rib can form a guide path toward the center of the second axis by the first rib and the second rib which are substantially opposed to each other. In particular, the first rib comprises an inlet wall extending in the direction of extension of the oil discharge port and an outlet wall extending in the second axial direction, and the second rib is connected to the outlet wall of the first rib below the first rib. The oil from the oil discharge port is efficiently guided to the support portion of the second shaft by being formed so as to face the second shaft in the direction of the second shaft.

The second ridge formed on the end wall of the converter housing has a ring-shaped ridge of a bearing holding portion of a second shaft.
By forming a notch in the ring-shaped jetty facing the guideway, oil can be supplied to the bearing particularly smoothly. Furthermore, by protruding the rib toward the transmission case side from the mating surface of the converter housing and the transmission case, oil is more reliably supplied to the bearing without waste.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a view showing an end wall of a converter housing with a counter shaft removed.

FIG. 3 is a longitudinal sectional view of the transmission showing the vicinity of an end wall of a converter housing.

FIG. 4 is a sectional view taken along the line AA in FIG. 2;

FIG. 5 is a diagram showing a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 transmission 2 transmission case 3 oil pump 4 oil pump housing 5 oil pump cover 7 converter housing 8 end wall 10 transmission mechanism section 11 main shaft (first shaft) 12 output gear 13 counter shaft (second shaft) 14 input gear 15 output Gear 20 Final gear 30 Bearing holding part 31 Concave part 32 Ring-shaped ridge 33 Notch 35 Bearing 36 Oil discharge port 40 First rib 41 Inlet wall 42 Outlet wall 45 Second rib R Guide path

Claims (6)

[Claims] A converter housing and a transmission case are connected to each other, and a first housing is provided near the connection portion.
An oil pump is provided on the shaft, and a lubrication structure for a second shaft in a transmission that supports one end of a second shaft adjacent to the first shaft on an end wall of the converter housing, wherein the oil pump has the second lubrication structure. A shaft lubrication structure for a transmission, comprising: an oil discharge port that opens on the shaft side; and a rib that guides oil from the oil discharge port in a second axial direction is provided on an end wall of the converter housing. . 2. The oil discharge port is open at an upper end of an oil pump housing, and the rib includes a first rib and a second rib which are substantially opposed to each other, and forms a guide path toward the center of a second shaft. The shaft lubrication structure for a transmission according to claim 1, wherein: 3. The first rib comprises an inlet wall extending in a direction in which the oil discharge port extends and an outlet wall extending in a second axial direction, and the second rib is provided below the first rib in a first direction. The shaft lubrication structure for a transmission according to claim 2, wherein the shaft is formed so as to partially face the outlet wall of the rib toward the second axial direction. 4. The second shaft is supported by a bearing held by a bearing holding portion formed on an end wall of the converter housing, and the bearing holding portion has a ring-shaped ridge on an opening edge of a concave portion for housing the bearing. , The second
4. The shaft lubrication structure for a transmission according to claim 2, wherein said rib is connected to a ring-shaped jetty. 5. The shaft lubrication structure for a transmission according to claim 4, wherein a cutout is formed in the ring-shaped jetty facing the guide path. 6. The shaft lubrication structure for a transmission according to claim 1, wherein the rib protrudes toward the transmission case from the mating surface of the converter housing and the transmission case. .