JP3496336B2 - Vehicle transaxle - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle transaxle having a structure in which three or more transmission input shafts, output shafts, drive shafts, etc. are incorporated. We are trying to improve it.

[0002]

2. Description of the Related Art A trunk axle is a combination of a speed change mechanism and a differential mechanism, which is constructed as one unit. As a document relating to this, a special feature, for example, is one in which a forward / reverse switching mechanism of a transmission is added. Kaihei 6-22138
Reference is made to Japanese Patent No. 4, etc.

[0003]

The conventional trunk axle, however, has the following problems.

That is, in the conventional transaxle, the installation position of the input shaft of the speed change mechanism is regulated by the engine, while the installation position of the drive shaft of the differential mechanism is determined by the input shaft of the speed change mechanism and the wheels. In a structure in which at least one shaft such as the output shaft of the speed change mechanism is arranged between the input shaft and the drive shaft, as shown in FIG. I have no choice but to install it.

For that reason, there is a concern that the bearing supporting the shaft at that portion may be insufficiently lubricated. However, such a bearing has not been devised so far to actively perform lubrication. .

An object of the present invention is to provide a novel trunk capable of efficiently lubricating a bearing for holding a rotary shaft arranged between an input shaft of a speed change mechanism and a drive shaft of a differential mechanism, regardless of the vertical level of the rotary shaft. I'm just proposing an axle.

[0007]

SUMMARY OF THE INVENTION The present invention, said input shaft and at least one connecting the drive shaft rotation axis between the drive shaft of the input shaft and the differential mechanism of the transmission mechanism, the rotation shaft a bearing for supporting, in a transaxle having a gear mounted on the shaft body of the rotating <br/> rotating shaft adjacent to the bearing, the rotary shaft from the oil passage provided in the rotating shaft axial direction at least one lubricating oil passage to lubricate by supplying oil to the gap between the inner race and the outer race of the bearing through the open side of the bearing and the gear toward the boundary portion between the bearing and the gear the gears on the side face of the bearing side, the oil flowing through the side surface of the gear
It has forced supply guide groove in the gap of the bearing, before
End of the outer periphery of the serial guide groove has a position facing the gap between the outer race and the inner race of the bearing, the lubricating oil passage is fitted in the axial direction of the oil passage between the gears in the rotational axis
Fitting larger fitting diameter of the fitting portion of the engaging portion or said bearing
Wherein a through hole was found provided in a direction perpendicular to the axial direction communicating with the engaging portion, in that it consists of the oil groove in the axial direction for communicating the through-hole and the boundary portion formed in a surface portion of the rotary shaft And the transaxle of the vehicle.

[0008]

[0009] In the transaxle as constituted above, the transmission, by a movable flange capable of moving the rotating to the rotating shaft integrally rotate together with the fixed flange and the rotary shaft does not move in the axial direction in the axial direction forming a pulley for V belt winding, supplied with centrifugal cancel oil to counteract the centrifugal force acting it adjacent to the movable flange in the hydraulic working chamber and the hydraulic working oil chamber pressed in order to approximate to the fixed flange In the V-belt type continuously variable transmission having the pressure correction chamber, the axial oil passage in the rotary shaft is preferably a centrifugal cancel oil supply oil passage.

[0010]

In the transaxle according to the first aspect of the present invention, the oil flows through the lubricating oil passage and the side surface of the gear and is forcibly supplied to the clearance of the bearing by the guide groove.

[0011] perpendicular to the large fitting unit and the axial direction communicating the diameter of the fitting portion of the lubricating oil passage, the fitting portion or the bearing in the axial direction of the oil passage between the gears in the rotational axis to a provided we through holes in the direction, the a through-hole and the boundary portion formed in the surface portion of the rotary shaft by the axial oil grooves communicating with the oil in a direction perpendicular to the axial direction Provided
Flows to the side of the gear via the oil groove of the through-holes to the axial direction formed on the surface layer portion of the rotary shaft, the guide groove
It is forcibly fed into the gap of the bearing.

In the transaxle according to the second aspect of the present invention, the oil flows from the centrifugal cancel oil supply oil passage of the V-belt type continuously variable transmission to a through hole provided in a direction orthogonal to the axial direction and to the rotating shaft. The oil flows through the side surface of the gear through the oil groove formed in the surface layer in the axial direction, and is forcibly supplied to the clearance of the bearing by the guide groove.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings.

FIG. 2 is a cross section of a transaxle of an example in which a V-belt type automatic transmission mechanism is incorporated (the input shaft of the transmission and the drive shaft of the differential device are symmetrical with respect to the axes, so half of them are omitted. FIG. 3 shows the main part thereof, in which 1 is a torque converter, 2 is a forward / reverse switching device, and 3 is a first pulley of the transmission. Is composed of an input shaft 3a, a fixed flange 3b fixedly held by the input shaft 3a, and a movable flange 3c movable along the axis of the input shaft 3a.

Reference numeral 4 is a second pulley of the transmission, and this pulley 4 comprises a fixed flange 4b fixedly held by the output shaft 4a and a movable flange 4c movable along the axis of the output shaft 4a. . Reference numeral 5 is a V-belt that connects the first pulley 3 and the second pulley 4 to each other, and the movable flange 3c of the first pulley 3 is moved by supplying and discharging hydraulic oil to and from the pulley cylinder chamber 6 Gear shifting is performed by changing the installation position of the V belt 5 on the third pulley 3 and the second pulley 4.

Further, 7 is an oil passage provided in the shaft main body on one side of the output shaft 4a, and 8 is a cylinder provided with a passage connecting to the oil passage 7 and provided on the back surface of the movable flange 4c of the second pulley 4. Of the second pulley 4 by supplying centrifugal cancel oil from the oil passage 7 to the cylinder chamber 8.
The movable flange 4c is prevented from moving in the axial direction due to the rotation of the gear, and the performance of the transmission mechanism is stabilized.

Further, 9 and 10 are bearings that rotatably support the output shaft 4a of the second pulley 4, 11 is a through hole that opens from the oil passage 7 toward the journal in which the bearing 10 is mounted,
Reference numeral 11a denotes an oil groove communicating with the through hole 11. From this through hole 11, through the oil groove 11a, the side surface of the bearing 10 and the guide groove 12a of the side surface of the park gear 12, the oil is introduced into the clearance 10c between the outer race 10a and the inner race 10b of the bearing 10. Is supplied for lubrication.

The park gear 12 has a guide groove 12a on the side surface on the bearing 10 side, and the end portion on the outer peripheral side of the guide groove 12a exists at a position facing the clearance 10c of the bearing 10. Further, 13 is a drive gear, 14 is an idler shaft, and this idler shaft 14 has an idler gear 14 a that engages with the drive gear 13. 15 is a pinion gear , 16,
Reference numeral 17 is a side gear, and 18 and 19 are drive shafts. The pinion gear 15, the side gears 16 and 17 and the drive shafts 18 and 19 form a differential mechanism.

In the transaxle having three or more shafts having the above-mentioned structure, the output shaft 4a forming the second pulley 4 has an input shaft 3a sandwiching the output shaft 4a from both sides as shown in FIG. And drive gears 18, 19
Since the bearing 10 which is arranged considerably higher than the above, and which particularly supports the output shaft 4a, usually does not take any measures, there is a concern that lubrication may be insufficient, but in the present invention, the main part thereof is shown in FIG. As described above, the oil flowing out from the through hole 11 flows through the oil groove 11a and the side surface of the bearing 10 and flows into the clearance 10c, and at the same time, the oil that travels the side surface of the park gear 12 is accelerated in the axial direction by the guide groove 12a. Guide groove 1
When reaching the outer peripheral side end of 2a, the clearance 10c of the bearing 10 is reached.
Since the oil is injected toward, the oil can be positively pushed into the gap 10c and efficient lubrication can be performed.

In this type of transaxle, the centrifugal cancel oil used for lubricating the bearing is the opening 20 connected to a control valve (not shown) and the oil gallery 2.
1. Since the oil is supplied to the oil passage 7 through the oil guide 22, a through hole 11 connecting the oil passage 7 and the journal of the bearing 10 and an oil groove 11a communicating with the through hole 11 are provided on the output shaft 4a. It suffices to provide only the guide groove 12a on the trunk, and the structure of the trunk axle does not become complicated.

The through hole 11 is, for example, the park gear 12.
The same lubrication effect can be obtained even if it is provided at the fitting portion between the output shaft 4a and the output shaft 4a. Further, if a through hole 11 is provided at a position corresponding to the boundary between the bearing 10 and the park gear 12, oil will be transferred to the bearing 10
Although it is not necessary to form the oil groove 11a in this case, the diameter of the output shaft 4a having the bearing 10 attached thereto is larger than the diameter of the output shaft 4a having the park gear 12 attached thereto. By providing the through hole 11 here, the decrease in strength of the output shaft 4a can be minimized.

[0022]

According to the present invention, in a transaxle of a vehicle having three or more shafts, even if there is a bearing that may cause insufficient lubrication, the existing gear (park gear, etc.) can be used to remove oil. Since more space can be supplied to the bearing clearance, the lubrication efficiency can be improved (claim 1).

Since the through hole is provided in a portion of the rotating shaft having a large diameter, the reduction in strength can be minimized (claim).
Item 1) .

Since the bearing is lubricated by partially utilizing the oil (centrifugal cancel oil) used for other purposes, it is not necessary to provide a new line and the structure is not complicated ( claim 2). ) .

[Brief description of drawings]

FIG. 1 is a diagram showing an appearance of a transaxle of a vehicle having three or more shafts.

FIG. 2 is a structural explanatory view of a transaxle according to the present invention.

FIG. 3 is an enlarged view showing a main part of the transaxle according to the present invention.

FIG. 4 is a diagram showing an appearance of the transaxle shown in FIG.

[Explanation of symbols]

1 Torque converter 2 Forward / reverse switching device 3 first pulley 3a input shaft 3b fixed flange 3c movable flange 4 second pulley 4a Output shaft (rotating shaft) 4b fixed flange 4c movable flange 5 V belt 6 Pulley cylinder chamber 7 oil passage 8 cylinder chamber 9 bearings 10 bearings 10a outer race 10b inner race 10c gap 11 Through hole 11a oil groove 12 park gear 12a guide groove 13 Drive gear 14 idler axis 15 pinion gear 16 side gear 17 Side gear 18 drive shaft 19 drive shaft 20 openings 21 Oil Gallery 22 Oil guide

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16H 57/00-57/12 F16H 55/00-55/30

Claims (2)

(57) [Claims] And 1. A of the input shaft and at least one connecting the drive shaft between the drive shaft of the input shaft and the differential mechanism of the transmission mechanism rotary shaft, a bearing for supporting the rotation shaft,
In transaxle having a gear mounted on the shaft body of the rotating shaft adjacent to the bearing, the rotary shaft from the oil passage provided in the rotating shaft axial direction in the boundary portion between the gear and the bearing at least one has a lubricating oil passage, wherein the gear is a side of the bearing side to lubricate by supplying oil to the gap between the opening and the inner race and the outer race of the bearing through the side surface of the bearing and the gear toward in the oil flowing through the side of the gear has a forcibly supplying guide grooves gap of the bearing, the end of the outer periphery of the guide groove is opposed to the gap between the outer race and the inner race of the bearing position has to the lubricating oil passage is large fitting portion in the radial and communication of the fitting portion of the fitting portion or the bearing in the axial direction of the oil path and the <br/> gear in said rotary shaft Provided in the direction orthogonal to the axial direction Et <br/> a through hole was the made a through-hole formed in the surface portion of the rotary shaft and the border portion from the oil groove in the axial direction that communicates the vehicle transaxle, characterized in that. 2. A transmission pulley of the rotary shaft and the V-belt winding by integrally movable rotating and fixing flange which does not move in the axial direction to the rotary shaft and axially rotate together movable flange forming a, V with a pressure compensation chamber for supplying the centrifugal cancel oil to counteract the centrifugal force acting it adjacent to the oil in the hydraulic working chamber and the hydraulic working chamber that presses in order to approximate to the fixed flange to said movable flange a belt type continuously variable transmission, an oil passage in the axial direction in the rotary shaft is a supply oil passage of the centrifugal cancel oil, transaxle according to claim 1.