JP2004019842A - Carrier of planetary gear device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a carrier of a planetary gear device capable of preventing undesirable lubrication oil from flowing into the carrier by improving the shape of a positioning mechanism for positioning a carrier body to a carrier cover forming the carrier of the planetary gear device. <P>SOLUTION: In this carrier of the planetary gear device, as a positioning means at the time of assembly, a recessed part not passing through the wall surface of the cover is formed in the carrier cover and a through-hole is formed in the carrier body, opposite to each other, in the carrier cover and the carrier body forming the carrier, respectively. Thus, when the carrier is assembled in an automatic transmission and the automatic transmission is operated, the undesired lubrication oil is prevented from being made to flow into the carrier through the through hole, and the effective supply of the lubrication oil to planetary gears can be realized. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a planetary gear device used for an automatic transmission or the like of a vehicle, and particularly to a carrier that supports a pinion shaft, which is one of the components of the planetary gear device.
[0002]
[Prior art]
Such a carrier usually accommodates a sun gear and a planetary gear of a planetary gear set and supports one end of a pinion shaft that rotatably supports the planetary gear, and a carrier that supports the other end of the pinion shaft and is coupled to the carrier body. Consists of a cover.
[0003]
When assembling the carrier by connecting the carrier main body and the carrier cover by welding or the like, it is necessary to correctly align them. Therefore, both are provided with a positioning mechanism facing each other. Conventionally, as this positioning mechanism, small holes penetrating both wall surfaces are formed, and positioning is performed by passing a positioning rod or the like through these through holes during assembly.
[0004]
Here, FIG. 4 is a cross-sectional view showing an enlarged part of an automatic transmission in which the planetary gear device including the carrier described above is incorporated. The illustrated planetary gear 31 of the automatic transmission 30 is a simple planetary gear having a sun gear 32 and a planetary gear 33, and a pinion shaft 34 of the planetary gear 33 is supported at both ends by a carrier cover 36 of a carrier 35 and a carrier body 37. .
[0005]
In this planetary gear device 31, the supply of the lubricating oil to the planetary gear 33 is performed by the oil passages 38 b and 38 c in the input shaft 38 and the oil passages 39 to 42 provided in the other components of the automatic transmission 30, and furthermore, the cancellation. This is performed through a gap 44 between the plate 43 and the carrier cover 36, and further through an oil passage 45 in the pinion shaft 34.
[0006]
[Problems to be solved by the invention]
As described above, through holes 46 and 47 are formed in the carrier cover 36 and the carrier body 37 of the carrier 35 for positioning during assembly, respectively. However, a part of the lubricating oil to be supplied from the input shaft 38 to the oil passage 45 of the pinion shaft 34 passes through a through hole 46 formed in the carrier cover 36 through a gap 44 between the cancel plate 43 and the carrier cover 36. 35. Therefore, there is a possibility that the lubricating oil is not sufficiently supplied to the planetary gear 33.
[0007]
The present invention improves the shape of an alignment mechanism for aligning a carrier body and a carrier cover constituting a carrier of a planetary gear device, thereby preventing undesired lubricating oil from flowing into the carrier. It aims to solve the problem of.
[0008]
[Means for Solving the Problems]
For these purposes, the carrier of the planetary gear set according to the first invention is:
A sun gear, a planetary gear, a ring gear, and a carrier in a planetary gear device including a carrier to which a pinion shaft that rotatably supports the planetary gear is attached, the carrier body supporting one end of the pinion shaft; A carrier cover that supports the other end of the pinion shaft and couples to the carrier body, wherein the carrier body and the carrier cover are provided with mutually facing alignment mechanisms for alignment during assembly, respectively. At
One of the positioning means opposed to each other is a through hole, and the other is a non-penetrating concave portion, and the concave portion does not penetrate the opening side of the oil passage in the axial direction of the pinion shaft.
[0009]
Further, the carrier of the planetary gear mechanism according to the second invention is the carrier according to the first invention,
An oil reservoir formed by a plate, a sealing means, and a carrier provided to face an opening of an oil passage in an axial direction of the pinion shaft is provided at an outer peripheral position of the opening.
[0010]
【The invention's effect】
In the first invention, as means for aligning the carrier main body and the carrier cover, a through hole is formed on the carrier main body side, and a concave portion that does not penetrate the carrier cover wall surface is formed on the carrier cover side. I have.
[0011]
Thereby, the carrier is incorporated in the automatic transmission, and when the automatic transmission is operated, the undesired lubricating oil passing through the through-hole is prevented from flowing into the carrier, and the effective lubricating oil is supplied to the planetary gears. Supply can be realized.
[0012]
In the second invention, an oil reservoir is provided on the outer periphery of the opening of the oil passage in the axial direction of the pinion shaft. This makes it possible to more effectively and efficiently supply the lubricating oil to the planetary gear.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
[0014]
1 and 2 show an embodiment of the carrier of the planetary gear device according to the present invention. FIG. 1 is a front view, and FIG. 2 is a side sectional view taken along line AA of FIG. .
[0015]
The illustrated carrier 10 includes a carrier cover 11 and a carrier body 12, and the leg 12a of the carrier body 12 and the carrier cover 11 are connected to each other by, for example, welding. Further, a pinion shaft 14 that rotatably supports the planetary gear 13 is supported between the carrier cover 11 and the carrier body 12. An oil passage 15 is formed inside the pinion shaft 14, and lubricating oil introduced from outside is supplied to the planetary gear 13 through the oil passage 15. Here, as shown in FIG. 1, the carrier 10 supports four pinion shafts 14, that is, the planetary gear set including the carrier 10 is provided with four planetary gears 13.
[0016]
The carrier cover 11 and the carrier body 12 of the illustrated carrier 10 are formed with a concave portion 16 and a through hole 17 for alignment at the time of assembly, respectively. That is, when assembling the carrier 10, positioning is performed through a positioning rod or the like.
[0017]
Unlike the conventional carrier 35 described above, the positioning recess 16 formed in the carrier cover 11 of the carrier 10 according to the present invention does not penetrate the wall surface of the carrier cover 11. This is because the planetary gear set including the carrier 10 is incorporated in the automatic transmission as described above, and when the automatic transmission is operated, the inflow of the undesired lubricating oil through the through-hole into the carrier 10 is prevented. This is to prevent the lubricating oil from being effectively supplied to the planetary gear 13.
[0018]
FIG. 3 is an enlarged sectional view showing a part of the automatic transmission provided with the planetary gear device including the carrier 10 described above. In the illustrated automatic transmission 20 as well, the supply of the lubricating oil to the planetary gear 13 is performed by the oil passages 21 a to 21 c in the input shaft 21, the oil passages 22 to 25 provided in the components of the automatic transmission 20, and the cancel plate. This is performed through a gap 27 between the lip seal 26 a provided on the carrier 26 and the carrier 10 and the oil passage 15 in the pinion shaft 14. The gap 27 functions as an oil reservoir and increases the amount of lubricating oil flowing into the pinion shaft 14.
[0019]
As described above, the positioning recess 16 provided in the carrier cover 11 does not penetrate the carrier cover 11. Therefore, the lubricating oil flowing into the gap 27 between the carrier cover 11 and the cancel plate 26 does not flow into the carrier 10. As a result, a sufficient supply of lubricating oil to the planetary gear 13 is performed.
[0020]
As described above, in the carrier of the planetary gear device according to the present invention, as a means for aligning the carrier body and the carrier cover, a through-hole is formed in the carrier body side, while the carrier cover side is formed in the carrier cover side. A recess that does not penetrate the cover wall surface is formed. Therefore, the carrier is incorporated in the automatic transmission, and when the automatic transmission is operated, the undesired lubricating oil passing through the through hole is prevented from flowing into the carrier, and the effective supply of the lubricating oil to the planetary gears is prevented. Can be realized.
[0021]
Further, in the above embodiment, since the opening of the oil passage in the axial direction of the pinion shaft is provided on the carrier cover side, the positioning mechanism on the carrier main body side is provided with a through-hole penetrating the wall surface of the carrier main body in the axial direction. The positioning mechanism on the carrier cover side is a concave portion that does not penetrate the wall surface of the carrier cover, but the present invention is not limited to this. That is, for example, an opening for the axial oil passage of the pinion shaft may be provided on the carrier body side, and the alignment mechanism on the carrier body side may be formed as a recess, while the wall surface on the carrier cover side may be formed as a through hole penetrating in the axial direction.
[0022]
It should be noted that the present invention is not limited to the above-described embodiment, but may be applied not only to a simple planetary gear device but also to a so-called Ravigneaux type planetary gear device and the like.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a carrier in a planetary gear device according to the present invention.
FIG. 2 is a side sectional view of the carrier of FIG. 1 taken along the line AA.
FIG. 3 is an enlarged sectional view showing a part of an automatic transmission incorporating the planetary gear set including the carrier shown in FIGS. 1 and 2;
FIG. 4 is an enlarged sectional view showing a part of an automatic transmission incorporating a conventional planetary gear device including a carrier.
[Explanation of symbols]
10, 35 Carrier 11, 36 Carrier body 12, 37 Carrier cover 13, 33 Planetary gear (pinion gear)
14, 34 Pinion shaft 15, 45 Oil passage 16 inside pinion shaft Positioning recess 17, 47 for carrier cover 11 Positioning through hole 20, 30 for carrier body Automatic transmission 21, 38 Input shaft 22 to 25, 39 -42 Oil passages 26,43 Cancel plate 27,44 Gap 31 between cancel plate and carrier cover 31 Planetary gear unit 32 Sun gear

Claims (2)

A sun gear, a planetary gear, a ring gear, and a carrier in a planetary gear device including a carrier to which a pinion shaft that rotatably supports the planetary gear is attached, the carrier body supporting one end of the pinion shaft; A carrier cover that supports the other end of the pinion shaft and is coupled to the carrier body, wherein the carrier body and the carrier cover are provided with mutually facing alignment mechanisms for alignment during assembly, respectively. At
A carrier for a planetary gear mechanism, characterized in that one of the positioning means facing each other is a through hole and the other is a recess that does not penetrate, and a recess that does not penetrate the opening side of the oil passage in the axial direction of the pinion shaft. In the carrier according to claim 1,
A carrier for a planetary gear mechanism, wherein an oil reservoir formed by a plate, a sealing means, and a carrier provided to face an opening of an oil passage in an axial direction of the pinion shaft is provided at an outer peripheral position of the opening.

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