JPH1026217A - Lubricating device for vehicular power transmission system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a simple structure in supplying lubricating oil in the inner room of a mission housing or a differential housing to a lubricated part side for lubrication. SOLUTION: An output gear 27 for generating power from a shift mechanism provided in a mission housing is engaged with a ring gear 39 provided in a differential housing. A part of the inner surface(s) of the mission housing and/or the differential housing is approached, respectively to each outer peripheral surface located in front of both the engaging parts 46 out of the external peripheral surfaces of the output gear 27 and the ring gear 39 at each tooth part. The outer peripheral surfaces are formed to a first circular and a second circular guide surface 59, 60. One end is opened toward the engaging part of the output gear 27 and the ring gear 36; the other end is opened toward a lubricating part side to provide an oil path 62.

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 an automobile power transmission system in which lubricating oil is supplied to a desired portion to be lubricated using components of the automobile power transmission system. .

[0002]

2. Description of the Related Art A conventional lubricating device for a power transmission system for an automobile is disclosed in Japanese Utility Model Publication No. 5-14034.

[0003] According to this, the power transmission device is provided with a transmission housing constituting an outer shell thereof, and a gear type transmission mechanism contained in the transmission housing for inputting power from an engine. On the other hand, a differential device for interlocking the left and right wheels with each other is provided. A ring gear supported by the differential housing so as to be rotatable about an extended axis; and an output gear that outputs power from the transmission mechanism and the ring gear mesh with each other.

The power of the engine is shifted by the speed change mechanism and transmitted to the differential. By the action of the differential, power having the same torque is transmitted to each of the left and right wheels, and the automobile runs. It is made to be made.

[0005] In the above-mentioned conventional technique, the internal space of the differential housing is located at a lower position than the bottom of the internal space of the transmission housing, and these two internal spaces are communicated with each other.

For this reason, with this configuration, lubricating oil for lubricating the transmission mechanism in the internal space of the transmission housing tends to flow into the internal space of the differential housing by natural flow, and therefore, the transmission oil of the transmission housing In the internal space, lubricating oil for lubricating the transmission mechanism tends to be insufficient, while the amount of lubricating oil accumulated in the internal space of the differential housing becomes excessive, and the resistance of the ring gear to agitation of the lubricating oil becomes excessive. Tends to.

Therefore, a flow regulating plate for regulating the flow of lubricating oil from the bottom of the internal space of the transmission housing to the internal space of the differential housing is provided.
The inflow of lubricating oil from the bottom of the internal space of the transmission housing to the internal space of the differential housing is restricted. Further, a splash gear that rotates together with the ring gear is provided, and the splash gear scoops up lubricating oil that accumulates at the bottom of the internal space of the differential housing, and the internal space of the transmission housing (a desired lubricated portion side). It is supplied to.

[0008] That is, the flow restricting plate restricts the lubricating oil from flowing into the internal space of the differential housing from the bottom of the internal space of the transmission housing, and the splash gear allows transmission of lubricating oil from the internal space of the differential housing. By supplying lubricating oil to the internal space of the housing, the lubricating oil is constantly stored at the bottom of the internal space of the transmission housing, so that the transmission mechanism is properly lubricated and the differential housing is The amount of the lubricating oil stored in the internal space is determined to be appropriate, so that an increase in the agitation resistance of the lubricating oil by the ring gear is suppressed.

[0009]

According to the above prior art, a separate splash gear is provided in order to supply lubricating oil to a desired lubricating portion side. And the configuration is complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is intended to supply lubricating oil in an internal space of a transmission housing or a differential housing to a portion to be lubricated to lubricate the lubricating oil. It is an object of the present invention to achieve this with a simple configuration.

[0011]

According to the present invention, there is provided a lubricating device for a power transmission system for an automobile, wherein the power transmission device 9 includes a transmission housing 1 having an outer shell.
6 and a gear type transmission mechanism 26 incorporated in the transmission housing 16 for inputting power from the engine 6, and a differential device 11 for interlocking the left and right wheels 4 and 4 with each other is provided. 11 is a differential housing 35 which forms the outer shell and is attached to the transmission housing 16; and the differential housing 35 is provided in the differential housing 35 so as to be rotatable around an axis 38 extending in the vehicle width direction. And an output gear 2 for outputting power from the transmission mechanism 26.
7 and the ring gear 39 mesh with each other, the outer peripheral surface of the tooth portion 44 of the output gear 27
A meshing portion 46 between the output gear 27 and the ring gear 39
A part of the inner surface of the transmission housing 16 and / or the differential housing 35 is brought closer to the outer peripheral surface of the output gear 27 along the outer peripheral surface of the output gear 27, and a part of the inner surface is formed into an arc-shaped first guide surface. 59 on the other hand, on the outer peripheral surface of the tooth portion of the ring gear 39, the meshing portion 46
A part of the inner surface of the transmission housing 16 and / or the differential housing 35 is made to approach the outer peripheral surface on the front side along the outer peripheral surface of the ring gear 39, and a part of the inner surface is formed as an arc-shaped second guide surface 60. , One end is open toward the engagement portion 46, and the other end is on the lubricated portion side (for example,
An oil passage 62 that opens toward the bulging portion 52 of the flow regulating plate 50 is provided, and the oil passage 62 is provided on the opposite side of the output gear 27 with respect to the first guide surface 59. is there.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes an automobile, which is indicated by an arrow Fr.
Indicates the front of the vehicle 1 and the following left and right refer to the width direction of the vehicle 1.

The automobile 1 includes a vehicle body 2 and a pair of left and right front and rear wheels 4, 4 for supporting the vehicle body 2 on a traveling road surface 3.

An engine room 5 is formed at a front portion of the vehicle body 2, and an engine 6 which is an internal combustion engine is provided in the engine room 5. The crankshaft 7 of the engine 6 extends in the vehicle width direction, that is, the engine 6 is of a horizontal type. A clutch 8 and a power transmission device 9 are connected to one side of the left and right sides of the engine 6, and are arranged side by side in the vehicle width direction. Further, there is provided a differential device 11 for interlocking the front left and right wheels 4, 4 with each other via a universal joint shaft 10.

In all of the drawings, the clutch 8 includes a clutch housing 13 attached to a crankcase 12 of the engine 6 and a clutch body 14 housed in the clutch housing 13.

The power transmission device 9 includes a transmission housing 16 that forms an outer shell and is attached to the clutch housing 13.
Input shaft 18 and output shaft 1 housed in internal space 17 of
9 is provided. The shaft centers 20, 21 of the input shaft 18 and the output shaft 19 extend in parallel with each other and extend in a substantially horizontal vehicle width direction. The transmission housing 16 is arranged so that the input shaft 18 is rotatable about its axis 20.
And one end of the input shaft 18 on the engine 6 side is interlocked to the crankshaft 7 of the engine 6 via the clutch body 14. The output shaft 19 is supported by a bearing 24 on the transmission housing 16 so as to be rotatable around its axis 21.

A gear type transmission mechanism 26 for interlocking the input shaft 18 and the output shaft 19 with each other is provided in the internal space 1.
7. The transmission mechanism 26 includes the output shaft 1
9 has an output gear 27 which is a spur gear integrally attached to one end of the engine 6 side. Further, a shift operation means 29 for enabling the speed change mechanism 26 to perform a shift operation by a driver's operation is provided. The shift operation means 29 is provided with an engaging member 30 for enabling and disengaging the gears in the transmission mechanism 26 or for enabling and disengaging the gear and the input shaft 18 or the output shaft 19. A shift fork 32 is provided which engages to transmit the operating force applied to the shift operation section 31 to the engagement element 30 and thereby performs the engagement / disengagement operation.

The differential device 11 has a differential housing 35 forming an outer shell. The differential housing 35 is attached to a lower portion of an end (corresponding to a part of the transmission housing 16 in the horizontal direction) of the transmission housing 16 on the engine 6 side in a direction along the shaft centers 20, 21. A part of the transmission housing 16 and each internal space 1 of the differential housing 35
7, 36 are communicated with each other. A differential case 37 is accommodated in an internal space 36 of the differential housing 35,
The differential case 37 is supported by the differential housing 35 so as to be rotatable about an axis 38 extending in the vehicle width direction parallel to the axes 20 and 21. A ring gear 39, which is a spur gear, is provided on the differential case 37 on the shaft center 38.
The ring gear 39 is attached to the output gear 2.
7, the power is transmitted from the output gear 27,
Thus, it rotates together with the differential case 37.

A differential pinion 40 is provided on the differential case 37 so as to be rotatable about an axis perpendicular to the axis 38. Also, this differential pinion 4
A pair of left and right differential side gears 41, 41 supported by the differential case 37 are provided so as to be rotatable about the shaft center 38 by meshing with the differential side gears 41.
The wheels 4 are linked to each other via the universal joint shaft 10.

The power of the engine 6 is transmitted from the crankshaft 7 to the input shaft 18 of the power transmission device 9 via the clutch 8, from which the speed is changed by a transmission mechanism 26 and transmitted to the output shaft 19. The power is transmitted from the output shaft 19 to the ring gear 39 of the differential device 11, and the power of the same torque is transmitted to the left and right wheels 4, 4 via the universal joint shaft 10 by the operation of the differential device 11. ,
Thereby, the automobile 1 can travel on the traveling road surface 3.

The bearings 23, 24, the transmission mechanism 26, and the tooth portions 44, 45 of the output gear 27 and the ring gear 39.
A lubricating device 48 is provided that lubricates the lubricated portion side with a lubricating oil 47, such as a meshing portion 46 between them. Next, the lubricating device 48 will be described.

A lubricating oil 47 is provided at the bottom of the internal space 17 on the end side of the transmission housing 16 opposite to the engine 6 (corresponding to another part except the above-mentioned part of the transmission housing 16 in the horizontal direction). It is stored. The lubricating oil 47 is scraped up by the gears of the transmission mechanism 26, and the parts of the transmission mechanism 26 are lubricated.

A lubricating oil 47 is stored at the bottom of the internal space 36 of the differential housing 35. This lubricating oil 47
Is lifted up by the ring gear 39, and the meshing portion 46 between the ring gear 39 and the output gear 27 is lubricated.

In the above case, the transmission housing 1
The inner space 36 of the differential housing 35 is located at a lower position than the bottom of the other inner space 17 of the sixth part 6, and the two inner spaces 17, 36 are communicated with each other.

For this reason, with this configuration, the lubricating oil 4 at the bottom of the internal space 17 of the transmission housing 16 is not used.
7 tends to flow into the internal space 36 of the differential housing 35 by natural flow. Therefore, a flow control plate 50 made of sheet metal is provided to control the flow of the lubricating oil 47 from the bottom of the internal space 17 of the transmission housing 16 to the internal space 36 of the differential housing 35. Therefore, in each drawing, the flow control plate 50 is shown in a satin pattern.) The flow regulating plate 50 extends in the up-down direction, and the internal space 1 in the other portion of the transmission housing 16 is formed.
7 and an internal space 36 of the differential housing 35. The flow control plate 50 is detachably fastened to a side wall of the transmission housing 16 by a fastener 51.

The flow restricting plate 50 is located near each side surface of the output gear 27 and the ring gear 39 meshed with each other. In the axial direction of each of the axes 20, 21, and 38,
A part of the upper edge of the flow control plate 50 is
The bulging portion 52 is bulged toward the ring gear 39 by bending, and the bulged portion 52 is located at the same position as at least a part of the tooth portions 44 and 45 of the output gear 27 and the ring gear 39.

3 to 9, inside the output shaft 19, a first oil passage 55 is formed on its axis 21. The first oil passage 55 is not shown, but each lubrication target of the transmission mechanism 26 is not shown. Part communicates through an oil hole. One end of an oil introduction pipe 56 (shown in a satin pattern in each drawing for easy understanding) is fitted into an end of the first oil passage 55 on the engine 6 side. Is connected to the internal space 17 of the mission housing 16 by a second oil passage 57 formed in the mission housing 16. In this case, an end opening of the second oil passage 57 on the side of the internal space 17 is located near an upper portion of the bulging portion 52.

Of the outer peripheral surfaces of the teeth 44 and 45 of the output gear 27 and the ring gear 39, the transmission housing 1
6 and / or a part of the inner surface of the differential housing 35 is approached.

More specifically, in the outer peripheral surface of the tooth portion 44 of the output gear 27, in front of the meshing portion 46, that is, in the rotation direction of the output gear 27 (arrow A in FIGS. 5 to 7), A part of the inner surface of the transmission housing 16 is made to approach the outer peripheral surface behind the engagement portion 46,
A part of this inner surface is an arcuate concave first guide surface 59. The outer peripheral surface of the output gear 27 and the first guide surface 59
Although not shown in detail, the gap between them is, for example, several mm or less.

Further, in the outer peripheral surface of the tooth portion 45 of the ring gear 39, in front of the meshing portion 46, that is, in the rotation direction of the ring gear 39 (arrow B in FIGS. A part of the inner surface of the differential housing 35 is made to approach the rear outer peripheral surface, and a part of the inner surface is an arc-shaped concave second guide surface 60. The gap between the outer peripheral surface of the ring gear 39 and the second guide surface 60 is not shown in detail, but is, for example, several mm or less.

One end is opened toward the engagement portion 46,
The third oil passage 62 is an oil passage that opens toward the upper portion of the bulging portion 52 whose other end is on the lubricated portion side and the end opening of the second oil passage 57 on the internal space 17 side. The third oil passage 62 is formed in the transmission housing 16. In this case, when viewed from a line of sight along the axis of the output gear 27 (FIGS. 5 to 7), the third oil passage 62 is provided on the opposite side to the output gear 27 with respect to the first guide surface 59. This prevents the third oil passage 62 from being formed in the first guide surface 59 in a groove shape. Also,
The third oil passage 62 extends along the first guide surface 59 in an arc around the axis 21 substantially.

When the output gear 27 and the ring gear 39 mesh with each other during transmission of power from the power transmission device 9 to the differential device 11 (arrows A and B in FIGS. 5 to 7),
The lubricating oil 4 held between the teeth 44 of the output gear 27
It is suppressed by the first guide surface 59 formed on the transmission housing 16 that the 7 is going to flow out between the tooth portions 44. On the other hand, the lubricating oil 47 that has accumulated at the bottom of the internal space 36 of the differential housing 35 is scraped up while being held between the teeth 45 of the ring gear 39 one after another.
An attempt to flow out from between the teeth 45 is suppressed by the second guide surface 60 formed in the differential housing 35.

The lubricating oil 47 held between the teeth 44, 45 is engaged with the meshing portion 46 of the gears 27, 39.
The lubricating oil 47 is forcibly extruded from between the tooth portions 44 and 45, and the lubricating oil 47 pressurized by the extrusion is supplied to the lubricated portion side described later through the third oil passage 62.

That is, the output gear 27 and the ring gear 3
9, the first guide surface 59 of the transmission housing 16, the second guide surface 60 of the differential housing 35, and the third oil passage 62
Forms a kind of "gear pump".
The output gear 27 and the ring gear 39 correspond to a rotor, the first and second guide surfaces 59 and 60 correspond to a pump case, and the third oil passage 62 corresponds to a discharge port.

A part of the lubricating oil 47 pushed out from the meshing portion 46 in the above-mentioned "gear pump" passes through the third oil passage 62 by the pressure, and the opening of the other end of the third oil passage 62 is opened. When the lubricating oil 47 is discharged from the flow restricting plate 50, the lubricating oil 47 is sent into the inside of the flow restricting plate 50 with the force of the discharge.
2 and is supplied to the internal space 17 of the other part of the transmission housing 16 having the transmission mechanism 26 on the lubricated part side (note (C) in FIGS. 4, 7, and 8).

Here, the lubricating oil 47 in the internal space 17 at the other part of the transmission housing 16 flows into the internal space 36 of the differential housing 35 at a lower position than the internal space 17 and The lubricating oil 47 in the internal space 17 tends to be insufficient, while the lubricating oil 47 in the internal space 36 of the differential housing 35 tends to be excessive.
And the supply of the lubricating oil 47 from the internal space 36 of the differential housing 35 to the internal space 17 of the transmission housing 16 by the "gear pump".

As a result, the transmission housing 16
The transmission mechanism 26 is appropriately lubricated by the lubricating oil 47 in the other internal space 17. The differential housing 3
5, the lubricating oil 47 in the internal space 36 is supplied to the internal space 17 in the other part of the transmission housing 16,
The lubricating oil 47 is prevented from becoming excessive in the internal space 36 of the differential housing 35, and the stirring resistance of the lubricating oil 47 by the ring gear 39 is prevented from becoming excessive.

Further, as described above, the third gear is pushed out from the meshing portion 46 of the "gear pump" and
The lubricating oil 47 discharged through the oil passage 62 has its momentum,
The oil is fed into the second oil passage 57, and is then supplied to the bearing 24 and the speed change mechanism 26, which are lubricated parts, sequentially through the oil introduction pipe 56 and the first oil passage 55 (see FIGS. 4 and 7).
(D) Note) The lubricating oil 47 allows the bearing 24
And the transmission mechanism 26 is lubricated.

Although the above description is based on the illustrated example, both the first and second guide surfaces 59 and 60 may be formed on the inner surface of the transmission housing 16, or may be formed on the inner surface of the differential housing 35. May be.

[0041]

According to the present invention, a power transmission device includes a transmission housing constituting an outer shell thereof, and a gear type transmission mechanism contained in the transmission housing for inputting power from an engine. A differential housing that forms an outer shell and is attached to the transmission housing, and a differential housing that is included in the differential housing and that extends in the vehicle width direction. A lubricating device for a power transmission system for an automobile, comprising: a ring gear rotatably supported by the differential housing, wherein the output gear outputs power from the transmission mechanism; and the ring gear meshes with each other. Of the outer peripheral surface of the tooth portion of the transmission housing and the transmission housing, Alternatively, a part of the inner surface of the differential housing is brought close to the outer peripheral surface of the output gear so that a part of the inner surface is an arc-shaped first guide surface. A part of the inner surface of the transmission housing and / or the differential housing is made to approach the outer peripheral surface on the front side of the meshing portion along the outer peripheral surface of the ring gear, and a part of the inner surface is formed as a second arcuate guide surface. A portion is opened toward the meshing portion, and another end portion is provided with an oil passage opening toward the lubricated portion side, and the oil passage is provided on a side opposite to the output gear with respect to the first guide surface. It is provided.

For this reason, when the lubricating oil is held between the teeth of the output gear and the ring gear that rotate while meshing with each other when the power is transmitted from the power transmission to the differential, the held lubricating oil is The first and second guide surfaces formed in the transmission housing and / or the differential housing prevent the liquid from flowing out between the teeth.

The lubricating oil held between the teeth is forcibly pushed out from between the teeth at the meshing portion of the two gears, and the pushed lubricating oil flows to the oil passage. At the same time, the oil is supplied to the lubricated portion through the oil passage.

Therefore, when lubricating oil in the internal space of the transmission housing or the differential housing is supplied to the lubricated portion side to lubricate the lubricating oil, the transmission housing, the output gear, the differential housing, and the ring gear, which are components of the power transmission system, are provided. Therefore, lubrication on the lubricated portion side can be achieved with a simple configuration while suppressing an increase in the number of parts.

[Brief description of the drawings]

FIG. 1 is a front view of an automobile.

FIG. 2 is a side view of the front part of the vehicle.

FIG. 3 is a partially enlarged sectional view of FIG. 1;

FIG. 4 is a partially enlarged sectional view of FIG. 3;

FIG. 5 is a partially enlarged sectional view of FIG. 2;

FIG. 6 is a view in which a part of the flow regulating plate is cut away in FIG.

FIG. 7 is a partially enlarged sectional view of FIG. 6;

FIG. 8 is a sectional view taken along line 8-8 of FIG. 7;

FIG. 9 is a perspective developed view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automobile 4 Wheel 6 Engine 9 Power transmission device 11 Differential device 16 Transmission housing 17 Internal space 18 Input shaft 19 Output shaft 20 Axis 21 Axis 26 Transmission mechanism 27 Output gear 35 Differential housing 36 Internal space 38 Axis 39 Ring gear 44 Tooth portion 45 Tooth portion 46 Mesh portion 47 Lubricating oil 48 Lubricating device 50 Flow control plate 52 Swelling portion 59 First guide surface 60 Second guide surface 62 Third oil path (oil path)

Claims (1)

[Claims] A power transmission device includes a transmission housing constituting an outer shell of the power transmission device, and a gear-type transmission mechanism provided in the transmission housing for inputting power from an engine. A differential device is provided, and the differential device constitutes an outer shell and is mounted on the transmission housing. The differential housing is rotatable around an axis included in the differential housing and extending in the vehicle width direction. A ring gear supported by the differential housing, and an output gear that outputs power from the transmission mechanism; and a lubricating device for an automobile power transmission system in which the ring gear meshes with each other. Of the outer peripheral surface, the transmission housing and / or the transmission housing and / or the outer peripheral surface on the near side of the meshing portion between the output gear and the ring gear. A part of the inner surface of the housing is brought close to the outer peripheral surface of the output gear, and a part of the inner surface is formed as a first arcuate guide surface. A part of the inner surface of the transmission housing and / or the differential housing is made to approach the outer peripheral surface on the front side of the portion along the outer peripheral surface of the ring gear, and a part of the inner surface is formed as an arc-shaped second guide surface. Is provided to open toward the meshing portion, the other end portion is provided with an oil passage opening toward the lubricated portion side, this oil passage,
A lubricating device for a power transmission system for an automobile, provided on a side opposite to the output gear with respect to the first guide surface.