JP2772749B2 - Ring gear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ring gear having a gear portion on its inner peripheral surface that meshes with a planetary pinion gear and a spline portion on its outer peripheral surface to which a clutch or a brake is attached.

[0002]

2. Description of the Related Art A planetary pinion gear type transmission is used as a transmission for an automobile. This type of transmission incorporates a ring gear having a gear portion that meshes with a planetary pinion gear on the inner peripheral surface, and a clutch or the like for engaging and disengaging with another adjacent ring gear on the outer peripheral surface of the ring gear. It is necessary to form a spline portion for attaching a brake for stopping the ring gear. Conventionally, the spline portion has been formed integrally with the gear portion on the outer peripheral surface of the ring gear.

[0003]

It is necessary to supply lubricating oil to a clutch or a brake attached to the spline portion. Therefore, it is necessary to provide an oil hole that opens to the spline portion so as to penetrate the inner peripheral surface side. However, if the gear portion and the spline portion are provided at the same axial position, an oil hole is formed in the gear portion. In this case, it is necessary to open the oil hole in the valley portion of the gear portion, and phase matching at the time of penetrating the oil hole becomes troublesome. Another problem is that the oil hole must be reduced in diameter so that the oil hole does not cover the tooth surface of the gear portion, and a plurality of oil holes must be formed to supply lubricating oil sufficiently. is there.

If the gear portion and the spline portion are offset in the axial direction, the oil hole is not provided in the gear portion, and the above-mentioned problem does not occur. However, the axial size of the ring gear becomes longer, and the transmission becomes larger. Become.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a ring gear that can be easily processed and can supply a sufficient amount of lubricating oil without increasing the axial dimension.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention comprises a gear portion meshing with a planetary pinion gear on an inner peripheral surface and a spline portion on an outer peripheral surface,
In a ring gear in which lubricating oil is supplied from an inner peripheral surface side to an oil supply port opened to a spline portion, a spline portion and an oil supply port are press-formed on a cylindrical wall surface. The gear member having the spline portion is inserted into the cylindrical member with a gap between the inner surface and the spline portion. An opening communicating with the filler port through the gap is provided.

[0007]

When the spline portion is press-formed on a cylindrical member separate from the gear member, an oil supply port is punched out at the same time, and a gear member is inserted into the cylindrical member to form a gap connected to the oil supply port. I do. Accordingly, if the gear member is appropriately provided with an opening so as to communicate with the gap, the opening communicates with the oil supply port through the gap, and lubricating oil is supplied from the inner peripheral surface side to the spline portion. .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, reference numeral 1 denotes a ring gear incorporated in a transmission M. The ring gear 1 is fitted on a gear member 2 having gears 21 and 22 on its inner peripheral surface and fitted on its outer periphery. And a cylindrical member 3. And the gear 21
Meshes with a planetary pinion gear PG1 sandwiched between a pair of carrier plates CP11 and CP12,
Also meshes with a planetary pinion gear PG2 sandwiched between a pair of carrier plates CP21 and CP22.
The one pair of carrier plates CP12 and the other pair of carrier plates CP21 are fixed to each other with a ring-shaped oil reservoir OR having a notch serving as an oil passage therebetween. Also, both planetary pinion gears PG1
PG2 is axially supported by pinion shafts PS1 and PS2 via needle bearings B1 and B2, respectively.
Lubricating oil is supplied to the needle bearings B1 and B2 through oil holes H1 and H2 opened in PS2. The oil that has lubricated the needle bearings B1 and B2
After lubricating the meshing portion between the gear 22 and the planetary pinion gears PG1 and PG2, the lubrication is sent to the outside of the gear member 2 from a plurality of openings 23 formed at equal intervals between the gears 21 and 22 on the same circumference.

On the other hand, the cylindrical member 3 has two cylindrical splines 31 and 32 having different pitch circle diameters formed by press working on a cylindrical wall portion thereof, and at the time of press working, the spline 31/32 has an appropriate position at the crest. Oil supply ports 31a and 32a which are long in the tooth width direction are opened by punching. After the cylindrical member 3 is fitted to the outer periphery of the gear member 2, it is welded to the gear member 3 at both ends 33 and 34 in the axial direction. In this state, an annular gap 4 serving as an oil reservoir is formed between the spline 32 having the larger pitch circle diameter and the outer peripheral surface of the gear member 2. This gap 4
Communicates with both the refueling ports 31a and 32a and also communicates with the opening 23. Therefore, as described above, the lubricating oil sent from the opening 23 to the outside of the gear member 2 is temporarily stored in the gap 4, and then the clutch C and the spline attached to the spline 31 are supplied through the two oil supply ports 31a and 32a. 32
Is supplied to the brake B attached to the vehicle.

In the above embodiment, a ring gear meshing with two sets of planetary pinion gears has been described. However, as shown in FIG. 2, the present invention can be applied to a ring gear meshing with one set of planetary pinion gears. The ring gear 1 'of this embodiment is formed by inserting a cylindrical gear member 5 into a bottomed cylindrical member 6, and a gear 51 meshing with a planetary pinion gear PG is provided on the inner peripheral surface of the gear member 5. An opening 52 is provided at a position offset from the gear 51. On the other hand, a spline portion 61 and an oil supply port 62 are formed on the cylindrical wall portion of the cylindrical member 6 by press working, and the bottom portion 63 functions as a retainer plate for holding the ring gear 1 '. Then, the gear member 5 is inserted into the cylindrical member 6, and both ends 64 and 65 in the axial direction of the gap 7 formed between the outer peripheral surface of the gear member 5 and the inner peripheral surface of the spline portion 61 are sealed. Oil sump. The gap 7 is formed between the opening 52 and the fuel filler 62.
, So that the lubricating oil flows from the opening 52 to the gap 7.
And is supplied from a fuel supply port 62 to a brake B attached to the spline portion 61.

[0011]

As is apparent from the above description, according to the present invention, the opening can be provided in a portion other than the gear portion without offsetting the position of the spline portion from the position of the gear portion. There is no need to determine the phase of the gear member at the time of installation, and furthermore, since a gap serving as an oil reservoir is provided, sufficient lubricating oil can be stably supplied to the clutch and brake attached to the spline portion.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view showing a configuration of another embodiment.

DESCRIPTION OF SYMBOLS 1 Ring gear 2 Gear member 3 Cylindrical member 4 Gap 5 Gear member 6 Cylindrical member 7 Gap 1 ′ Ring gear 23 Opening 31 Spline 32 Spline 31a Oil filler 32a Oil filler 61 Spline 62 Oil filler

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toshiki Takeda 1-10-1 Shinsayama, Sayama City, Saitama Prefecture Honda Engineering Co., Ltd. (56) References JP-A-48-29945 (JP, A) JP-A-6-207650 (JP, A) JP-A-2-102058 (JP, U) JP-A-1-144562 (JP, U) JP-A-59-133863 (JP, A) U) (58) Field surveyed (Int.Cl. ⁶ , DB name) F16H 57/04 F16H 1/28 F16H 3/44

Claims (1)

(57) [Claims] 1. A ring gear having a gear portion meshing with a planetary pinion gear on an inner peripheral surface, a spline portion on an outer peripheral surface, and supplying lubricating oil from an inner peripheral surface side to an oil supply opening opened in the spline portion. In the above, a gear member having a gear portion on an inner peripheral surface is formed on a cylindrical member obtained by pressing a spline portion and an oil filler on a cylindrical wall surface, and a cylindrical member having a gap between the inner peripheral surface of the spline portion. And the gap is sealed at both ends in the axial direction to form an oil reservoir, and the gear member is provided with an opening communicating with the oil supply port through the gap.