JPH0611018A - Lubricator for power transmitter - Google Patents

Abstract

PURPOSE:To provide a lubricator for a power transmitter, capable of avoiding formation of an oil sump on a lubricating oil supplying side to a differential case inside a transfer case, and directing a flow of lubricating oil toward the differential case. CONSTITUTION:A differential mechanism is provided with a differential case 17 is rotatably supported inside a transfer case 5 sealed with lubricating oil. The base portion 65 of a lubrication auxiliary member 63 for embedding a recess 60 is inserted into the recess 60 formed on the transfer case 5 at the end of the differential mechanism and having a bottom lower than the inner circumference at the end of the differential case 17. A guide 67 for directing a flow of the lubricating oil toward the inner circumference of the differential case 17 is mounted on the upper surface of the base portion 65, and further, an oil feeding tank 47 for introducing the scraped-up lubricating oil toward the guide 67 is disposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating device for a power transmission device which uses a planetary gear mechanism for a traveling drive system of a vehicle or the like.

[0002]

2. Description of the Related Art An example of a power transmission device using a planetary gear mechanism is shown in a vertical plan view in FIG.

The driving force of the engine is input from a transmission (not shown) to a center differential (planetary gear mechanism) 107 via an input shaft 101 and a hollow member 103, and is connected to a planet carrier 109 of the planetary gear mechanism 107 and this. One power is split and transmitted to the left output shaft 111,
The other power split into the sun gear 113 of the planetary gear mechanism 107 is output to the left gear 119 coupled to the sun gear 113 via the differential case 117 coupled to the planet output shaft 115 of the sun gear 113, and to the gear 119. The other power is output to the drive pinion shaft 129 through the meshed gear 121, the rotary shaft 123, and the bevel gears 125 and 127.

The position of the planetary gear mechanism 107 in the transfer case 105 in the axial direction is a hollow disk-shaped shim 136.
Positioned by the hollow hole 137 of the shim 136,
It is formed near the shaft end of the planet output shaft 115.

One of the powers split into the left output shaft 111 is supplied to a left front axle (not shown) by a front differential (not shown) and a right front axle 131 inserted into the hollow portion of the planet output shaft 115. Is differentially divided into.

The left side of the differential case 117 is the gear 11
The transfer case 105 is pivotally supported by a bearing 133 on the right side and a bearing 135 on the right side.

The planetary gear mechanism 107 is arranged in the upper part of the transfer case 105, and the planetary gear mechanism 1 is provided.
07, especially internal gear 139 and outer planetary gear 1
It is difficult to supply oil to the meshing part with 41 and the shaft support part of the planetary pin 141 and the outer planetary gear 141 and the inner planetary gear 145.

Therefore, an oil feeding trough 149 extending from above the differential case 117 to above the bearing 147 of the front axle 131 is arranged in the transfer case 105, and the lubricating oil scraped up by the gear 119 is taken in by the intake port 151 of the oil feeding trough 149. From the outlet 153 of the oil supply trough 149 to lubricate the bearing 147 as shown by the arrow b to supply oil around the front axle 131 toward the differential case 117, and from the hollow hole 137 of the shim 136. Differential case 1
Oil is being sent to 17 in the direction of arrow c.

[0009]

In the lubricating device for such a power transmission device, the bearing 147 and the front axle 1 are used.
Lubricating oil supplied to the periphery of 31 is accumulated in the transfer case 105 and stays in a concave portion 138 having a bottom portion vertically lower than the end edge portion of the hollow hole 137 of the shim 136, and the oil reservoir (FIG. 6 and the hatched portion H) in FIG. 7 is generated, and the amount overflowing from this oil sump is the differential case 117.
Is sent to.

Therefore, when the amount of oil accumulated in the recess 138 is large, the differential case 117 is sufficiently lubricated, but the lubricating oil may be insufficiently supplied to parts other than the differential case 117. On the contrary, when the amount of oil accumulated in the oil sump is small, lubrication to parts other than the differential case 117 is sufficiently performed, but there is a risk that the supply of lubricating oil to the differential case 117 will be insufficient. Further, such an inconvenience can be avoided by previously circulating an extra amount of lubricating oil corresponding to the amount of oil sump, but an increase in lubricating oil contributes to an increase in weight and cost.

Further, from the bearing 147 to the front axle 13
Since the lubricating oil supplied to the periphery of No. 1 receives a force in the rotation direction of the front axle 131 (g direction in FIG. 8), the lubricating oil is not directed to the differential case 117, and the lubricating oil is actively supplied. May not be done.

The present invention has been made in order to solve such a conventional problem, and an object thereof is to prevent the occurrence of an oil pool on the lubricating oil supply side to the differential case in the transfer case. The purpose of the present invention is to provide a lubricating device for a power transmission device that can direct the flow of lubricating oil to the differential case.

[0013]

In order to achieve the above object, a lubricating device for a power transmission device according to the present invention is provided with a differential mechanism in which a differential case is rotatably supported in a case in which lubricating oil is sealed, A filling member that fills this recess is provided in a recess formed in the case at the end of this differential mechanism and having a bottom portion that is lower than the inner circumference of the end of the differential case. A guide for directing the circumference is provided, and a lubricating oil supply member for guiding the scraped lubricating oil to the guide side is provided.

[0014]

The lubricating oil is guided from the lubricating oil supply member to the guide side and flows toward the inner circumference of the differential case by the guide.
At this time, the recess has a bottom that is lower than the inner circumference of the differential case, but since this recess is filled with the filling member, the occurrence of oil pooling in this recess is avoided and it is guided to the guide side. The lubricating oil flows to the inner circumference of the differential case without stagnation.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional development view (a sectional development view taken along the line ABCD of FIG. 2) in which the lubricating device according to the present invention is applied to a power transmission device using a planetary gear mechanism. Figure 1
FIG. 7 is a sectional view taken along line EE of FIG.

The driving force of the engine is input to a transfer case 5 (case) from a transmission (not shown) via an input shaft 1 and a hollow member 3, and a planet carrier 9 of a planetary gear mechanism 7 and a left side of the planet carrier 9 connected thereto. One power is split and transmitted to the output shaft 11, and the other power is split and transmitted to the sun gear 13 of the planetary gear mechanism 7. Here, the transfer case 5 is attached to the vehicle so that the left side in FIG. 2 is vertically higher.

One of the powers split into the left output shaft 11 is driven by a front differential (not shown) to the left front axle (not shown) and the right front axle 31 (drive) which is inserted into the hollow portion of the planetary output shaft 15. Axis) and differentially divided.

The other power split into the sun gear 13 of the planetary gear mechanism 7 is output to the left gear 19 connected to the sun gear 13 via the differential case 17 connected to the planet output shaft 15 of the sun gear 13, Further, it is output to the drive pinion shaft 29 via the gear 21 meshing with the gear 19, the rotary shaft 23, and the bevel gears 25 and 27.

The differential case 17 is pivotally supported on the transfer case 5 by a bearing 33 on the left side and a bearing 35 on the right side via a gear 19.

In the planetary gear mechanism 7 of the illustrated example, the planet carrier 9 and the end plate portion 37 are connected by a bridge portion (not shown), and the internal gear 41 formed in the hollow member 3 is axially supported by the planet pin 39. The outer planetary gears 43 mesh with the inner planetary gears 44 that pivotally support the sun gear 13 on the planet pins 38, respectively.

The differential case 17 in the transfer case 5
An oil supply gutter 47 as a lubricating oil supply member is arranged above the bearing 45 of the front axle 31 from above. The lubricating oil scraped up by the gear 19 and the differential case 17 is sent in the direction of the arrow a from the intake port 49 of the oil supply gutter 47, and lubricates the bearing 45 from the discharge port 51 of the oil supply gutter 47 as shown by the arrow b. The oil is fed around the front axle 31 toward the differential case 17 in the direction of arrow c.

The axial position of the planetary gear mechanism 7 in the transfer case 5 is determined by the outer race 5 of the bearing 35.
3 and the side wall portion 5 of the bearing fitting hole of the transfer case 5
5 is positioned by a hollow disk-shaped shim 57 interposed between the planetary shaft 5 and the planetary output shaft 15.
Is formed near the end of the shaft. Here, in the present embodiment, the inner circumference of the hollow portion of the planetary output shaft 15 constitutes the inner circumference of the differential case 17, and the inner circumference of the differential case 17 substantially coincides with the edge portion of the hollow hole 59 of the shim 57. There is.

Between the bearing 45 of the front axle 31 and the differential case 17 in the transfer case 5, a recess 60 having a bottom which is vertically lower than the edge of the hollow hole 59 of the shim 57 is formed. An oil feeding auxiliary member 63 is arranged in the recess 60. As shown in FIG. 3 and FIG. 4, the oil feeding auxiliary member 63 is provided with a base portion 65 as a filling member, a plate-shaped guide 67 protruding from the upper surface of the base portion 65, and an upper side portion of the base portion 65. It consists of the arm 69
These are integrally formed.

The upper surface of the base portion 65 is formed in a flat shape, and the lower surface thereof is formed in an arc shape so as to be aligned with the inner peripheral surface of the transfer case 5. As shown in FIG. 4, when the transfer case 5 is installed, the base portion 65 is located vertically below and fills the recess 60, and the upper surface of the base portion 65 has the shim 5
7 is formed so as to substantially coincide with the edge of the hollow hole 59.

The guide 67 has a height that gradually decreases in the vertical direction from one end to the other end.
In the longitudinal direction, the guide 67 is formed so as to extend from the outer peripheral side toward the center, and the upper end of the guide 67 is, as shown in FIG.
When it is installed in the transfer case 5, it has a curved shape along the outer peripheral surface of the front axle 31.

The arm 69 has flexibility, and extends from both ends of the upper surface of the base portion 65 substantially at the center in the longitudinal direction along the inner peripheral surface of the transfer case 5. A locking portion 69a that can be locked between the transfer case 5 and the oil feeding trough 47 is formed at the tip of the arm 69. By locking the locking portion 69a, the oil feeding inside the transfer case 5 is performed. The auxiliary member 63 is positioned, and the base portion 65 is held so as to be positioned vertically below.

Next, the operation of this embodiment will be described.

The lubricating oil scraped up by the differential case 17 and the gear 19 of the planetary gear mechanism 7 is sent from the intake port 49 of the oil supply gutter 47 in the direction of arrow a, and from the discharge port 51 of the oil supply gutter 47 to the direction of arrow b. As described above, the bearing 45 is lubricated, and the oil is sent in the recess 60 toward the differential case 17.

At the time of this oil feeding, the recess 60 in the transfer case 5 is filled with the base portion 65 of the oil feeding auxiliary member 63, so that the lubricating oil supplied from the oil feeding trough 47 stays in the recess 60. It is distributed to the differential case 17 without performing.

Since the guide 67 is provided along the outer circumference of the front axle 31, as shown in FIG.
The lubricating oil receiving the force of 1 in the rotation direction flows along the guide 67 as indicated by an arrow f. For this reason, the lubricating oil positively flows toward the differential case 17, and the occurrence of oil accumulation is avoided.

Most of the lubricating oil that has flowed to the differential case 17 flows from the hollow portion 59 of the shim 57 to the front axle 3 as indicated by arrow c.
1 and the planet output shaft 15, and thereby, the meshing portion between the internal gear 41 and the outer planet gear 43, the sun gear 13 and the inner planet gear 44, the planet pin 39 and the outer planet gear 43. In addition, the shaft support between the inner planetary gear 44 and the planetary pin 38 is sufficiently lubricated. Further, a part of the lubricating oil passes through the bearing 35 and the meshing gap of the spline 59 connecting the boss portion of the end plate portion 73 of the differential case 17 and the planetary output shaft 15 to lubricate them.

As described above, according to this embodiment, the recess 60 is formed.
Since the oil sump is avoided and the lubricating oil flows toward the differential case 17, the amount of lubricating oil supplied to the differential case 17 can be reduced and the lubricity in the differential case 17 can be improved. Further, this makes it possible to sufficiently supply the lubricating oil to the portion other than the differential case 17, and improve the lubricity of the portion other than the differential case 17.

The present invention does not limit the shape of the base portion 65 and the guide 67 of the lubrication assisting member 63 to the shape of this embodiment, and the method of holding the lubricating member 63 is also limited to the support by the arm 69. Not something.

[0035]

As described above, according to the present invention, the filling member prevents the oil from accumulating in the recess, and the guide allows the lubricant to flow toward the differential case. Oil improves the lubricity of the differential case, and also improves the lubricity of parts other than the differential case.

[Brief description of drawings]

FIG. 1 is a sectional development view in which a lubricating device according to the present invention is applied to a power transmission device using a planetary gear mechanism (AB in FIG. 2).
It is a sectional development view of line -CD).

FIG. 2 is a sectional view taken along line EE of FIG.

FIG. 3 is an overall perspective view of a lubrication auxiliary member.

FIG. 4 is a sectional view taken along line FF in FIG.

FIG. 5 is a cross-sectional view from above of a transfer case in which a lubrication auxiliary member is arranged.

FIG. 6 is a sectional development view showing a conventional lubricating device.

7 is a sectional view taken along line GG in FIG.

8 is a cross-sectional view of a main part of the lubricating device of FIG. 6 from above.

[Explanation of symbols]

 5 Transfer Case (Case) 17 Differential Case 47 Oil Supply Trough (Lubricating Oil Supply Member) 60 Recessed Section 65 Base (Filling Member) 67 Guide

Claims (1)

[Claims] 1. A differential mechanism in which a differential case is rotatably supported in a case containing lubricating oil,
A filling member that fills this recess is provided in a recess formed in the case at the end of this differential mechanism and having a bottom portion that is lower than the inner circumference of the end of the differential case. A lubricating device for a power transmission device, comprising a guide for directing the circumference, and a lubricating oil supply member for guiding the scraped lubricating oil to the guide side.