JP3377274B2 - Carrier device for planetary gear set - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier for a planetary gear set used for an automatic transmission of an automobile. [0002] Hitherto, as a carrier device of a planetary gear device, for example, those described in JP-A-60-84443 and JP-A-1-148142 are known. [0003] These conventional devices have a structure in which a carrier body is formed by connecting two side-by-side plates by a column member, and a pinion gear is supported on a pinion shaft spanned between the plates. The former publication discloses a structure in which a boss is punched out to one side of a plate, and the latter publication discloses a structure in which a column member is formed by bending a plate-like member. I have. [0004] However, as described above, in the structure in which the carrier body is formed by pressing or bending, there is a limit to the workable plate thickness, and the required rigidity is reduced. There is a problem that it is difficult to secure them, and that the durability of the components is adversely affected. In particular, when the column member is bent as in the latter publication, the processing is complicated, the degree of freedom of the shape of the column member is small, and it is difficult to ensure the accuracy of the carrier body. [0005] Also, a technique is known in which an oil sump member for collecting lubricating oil scattered for lubricating the pinion gear and flowing toward the pinion gear is provided between the pinion gears (see Japanese Patent Application Laid-Open No. 2-72243). .
Therefore, if the configuration corresponding to the oil sump member is formed integrally with the pillar member, the number of parts and the labor for manufacturing can be reduced, but if the degree of freedom and accuracy of the pillar member shape are low as described above, There is also a problem that it is difficult to form the column member into a shape that allows lubrication. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and is a carrier which is easy to process, reduces the weight while securing the required rigidity of the carrier body, and can lubricate the pinion gear. It is intended to provide a device. In order to achieve the above object, according to the present invention, a carrier body is formed by connecting two side-by-side plates by a column member, and a plurality of plates are provided between the plates. A pinion shaft, a pinion gear is supported on each of the pinion shafts, and a boss portion coupled to a rotating shaft is integrally formed on one of the plates. And is formed by welding a column component including at least a column member, and a plate component including at least one of the plates and formed separately from the column component, A hollow portion is formed inside the column member, and the side surface on the rotation center side has
Grooves as guides to guide the lubricating oil in the direction of the pinion shaft or the pinion gear supported by it
And a notch at an axial end of the groove.
There said pinion gear side and the groove has a configuration is <br/> Is communicated are formed. The column member may be formed integrally with the other plate not included in the plate member. In this case, the plate member includes one plate. When the column member does not include the other plate, two plate members are provided, one including the one plate and the other including the other plate. When the carrier body is manufactured, first, a sintered metal material is sintered and formed to form a column member and a plate member. If another component is included in the carrier body, the component is also formed by sintering. [0010] Then, the constituent members are welded to each other and formed integrally to form a carrier body. Next, when the carrier body is rotated, lubricating oil flowing radially from the center of rotation is received by a concave groove which is a guide portion formed on a side surface of the column near the center of rotation.
In addition, provided at the axial end of the groove, the groove and
A notch communicating with the pinion gear side guides the pinion shaft or the direction of the pinion gear to lubricate the pinion shaft. Embodiments of the present invention will be described below in detail with reference to the drawings. The carrier apparatus according to the embodiment of the present invention comprises a front planetary gear (planetary gear unit) FP and a rear planetary gear (planetary gear unit) RP of the automatic transmission AT shown in FIG.
Since the carrier devices applied to the respective planetary gears FP and RP have different structures, the carrier device applied to the rear planetary gear RP will be described below in the first embodiment, and the carrier device applied to the front planetary gear FP will be described in the first embodiment. A description will be given as two embodiments. FIG. 1 is a sectional view showing a carrier body 11 of a rear carrier 1 which is a carrier apparatus according to a first embodiment of the present invention. The carrier body 11 is mounted on an output shaft OUT (rotary shaft: see FIG. 6). Column member 12 formed by sintering and molding a sintered metal material integrally with the boss 12a, the plate 12b, and the column member 12c, and a sintered metal material disposed in parallel with the plate 12b. (Plate component) 1 formed by sinter molding of
3, and the column member 12 of the column member 12
c and the plate 13 are welded. In addition,
In carrying out this welding, means for laser welding the inner and outer two portions (points indicated by arrows Y1 and Y2) of the end surface of the column member 12c in the direction perpendicular to the axis, or brazing the end surface of the column member 12c over the entire circumference. Welding means can be used. An internal gear I2 is provided on the outer periphery of the plate 13. This internal gear I
Numeral 2 meshes with a pinion gear 26 of the front planetary gear FP, which will be described later, is made of steel to ensure strength, and is welded to the outer peripheral surface of the plate 13. Each of the plates 12b and 13 has
A plurality of shaft holes 12d and 13a are formed on the same circumference (see FIG. 2), and the plates 12b and 13 are arranged with the shaft holes 12d and 13a facing each other. The pinion shaft 15 is inserted into both shift holes 12d and 13a.
Are inserted and supported, and a pinion gear 16 is rotatably supported by the pinion shaft 15 (see FIG. 6). The pinion gear 16 meshes with the sun gear S1 and the internal gear I1 (see FIG. 6). As shown in the front view of the pillar component member 12 in FIG. 2, the pillar members 12c are arranged between the pinion gears 16 (disposed at positions indicated by oblique lines) and provided in a plurality in the circumferential direction. It has a substantially fan-shaped cross section and a hollow portion 12e formed inside. In the column member 12c, a groove 12f as a guiding portion is formed in the side surface on the side of the rotation center C in the axial direction. As shown, a notch 12g is formed so that the inside of the concave groove 12f communicates with the pinion gear 16 side. The groove 12f including the notch 12g is indicated by an arrow O in the drawing.
As shown by i, the lubricating oil scattered in the radial direction from the rotation center C side is directed to the pinion gear 16, the pinion shaft 15, and the shaft hole 13a. Next, a description will be given of a front carrier 2 which is a carrier device according to a second embodiment of the present invention. FIG. 4 is a cross-sectional view showing a carrier main body 21 of the front carrier 2, and the carrier main body 21 includes a column component 22 and a plate (plate component) 23.
The column component member 22 is formed by sintering and molding a sintered metal material integrally with the boss 22a, the plate 22b, and the column member 22c, as in the first embodiment. The column member 2 is formed by sintering a sintered metal material in parallel with the plate 22b.
2c is welded to the plate 23 by brazing the front end surface over the entire surface. In addition, each plate 22b, 23 has
Shaft holes 22d and 23a are formed, and a pinion shaft 25 is inserted and supported. Further, the pinion shaft 25 has an internal gear I2 and a sun gear S
6 is supported (see FIG. 6).
reference). A hollow portion 22e is formed inside the column member 22c, and a side surface on the side of the rotation center C is provided with a hollow portion 22e as shown in FIG. Unlike the first embodiment, a guide surface (guide portion) 22f is formed that is gently projected toward the rotation center C and that is gently inclined toward the shaft hole 22d. Like the concave groove 12f, the guide surface 22f receives the lubricating oil that moves in the radial direction from the rotation center C side in the pinion gear 26 or the shaft hole 22d which is disposed at a position shown by oblique lines in the drawing as shown by an arrow Oi. It is for guiding in the direction. The plate 2b of the pillar component member 22 has a guide groove 22 for guiding lubricating oil to a shaft hole 22d.
g is formed from the inner periphery of the boss 22a to the shaft hole 22d. As shown in FIG. 6, the inner peripheral surface of a spline member SP that is spline-coupled to the clutch drum BD is laser-welded to the outer peripheral surface of the plate 23. Although it is formed by sintering using a sintered metal material, if it is desired to increase the strength, it may be formed by press forming. In the apparatus of the present embodiment constructed as described above, in the case of the rear carrier 1, the lubricating oil scattered from the sun gear S1 and the like is captured and stored in the concave groove 12f. Via pinion gear 1
6 (see arrow Oi in FIG. 2). Further, in the case of the front carrier 2, lubricating oil scattered from the sun gear S2 and the like is guided by the guide surface 22f of the column member 22c as shown in FIG.
Is guided to the pinion gear 26 side as shown by the arrow Oi. Therefore, appropriate lubrication of the pinion gears 16, 26 and the pinion shafts 15, 26 is ensured. As described above, in the present embodiment, the sinter-formed column member 12, 22 and the sinter-formed plates 13, 23 are welded to each other to form the carrier main body 11. , 21 are formed, and the column members 12c, 22c are formed with the hollow portions 12e, 22e and the concave groove 12f, the notch portion 12g for guiding the lubricating oil, or the guide surface 22f, so that the following effects can be obtained. Since the carrier main bodies 11 and 21 are formed by sinter molding, molding is easy and excellent in manufacturability, and it is easy to secure necessary rigidity by changing a plate thickness as needed, and durability is high. Is excellent. The hollow portions 12 are formed in the pillar members 12c and 22c.
Since e and 22e are provided, the weight can be reduced. As described above, since it is formed by sintering, the degree of freedom in forming and the forming accuracy are high, and the column members 12 c, 2
In forming the concave groove 12f and the cutout portion 12g as the guide portion for guiding the lubricating oil to 2c, or the guide surface 22f, these can be formed with a high degree of freedom and accuracy, and a high lubrication effect can be obtained. Since the internal gear I2 fixed to the outer periphery of the carrier main body 11 is formed of a steel material, necessary strength can be easily obtained. Although the embodiment of the present invention has been described with reference to the drawings, the specific configuration is not limited to this embodiment. For example, in the embodiment, the column members 12, 22 are
The column members 12c, 22c and the plates 12b, 22b are formed integrally with each other.
Alternatively, the plates 12b and 22b may be separately formed and sintered and formed separately, and then welded to the pillars 12c and 22c. As described above, in the carrier device of the planetary gear device according to the present invention, the carrier main body is formed by welding the sintered column member and the sintered plate member. The column member of the column member is formed with a hollow portion and a guiding portion for guiding lubricating oil.
A groove is formed in the axial direction, and
Notch is formed on the opposite end so that the concave groove and the pinion gear side
Since bets is formed so as to communicate the lubricating splashing radially
It is easy to form the oil and has excellent productivity, and it is easy to secure the required composition by changing the sheet thickness as necessary, and it is excellent in durability. The effect of reducing the weight can be achieved, and since the molding is performed by sintering, when forming the guiding portion for guiding the lubricating oil to the column member, these can be provided with a high degree of freedom.
It can be formed with high precision, and a high lubrication effect can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a carrier body of a carrier device according to a first embodiment of the present invention. FIG. 2 is a front view showing a column member of the carrier body of the first embodiment. FIG. 3 is a perspective view showing a main part of a column member of the first embodiment device. FIG. 4 is a sectional view showing a carrier body of a carrier device according to a second embodiment of the present invention. FIG. 5 is a front view showing a constituent member for a pillar portion of a carrier body of the second embodiment. FIG. 6 is a sectional view showing an automatic transmission to which the first embodiment device and the second embodiment device are applied. DESCRIPTION OF SYMBOLS 1 Rear carrier (carrier device of first embodiment) 2 Front carrier (carrier device of second embodiment) 11 Carrier body 12 Column member 12b Plate 12c Column member 12e Hollow portion 12f Groove (induction) 12g Notch (guide portion) 13 Plate (plate component member) 15 Pinion shaft 16 Pinion gear 21 Carrier body 22 Column component member 22b Plate 22c Column member 22e Hollow portion 22f Guide surface (guide portion) 23 Plate (plate configuration) Members) 25 Pinion shaft 26 Pinion gear

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16H 1/28 F16H 3 F16H 57

Claims (1)

(57) Claims 1. A carrier body is formed by connecting two side-by-side plates with a column member, and a plurality of pinion shafts are bridged between the plates, and each pinion is A pinion gear is supported on the shaft, and on one of the plates,
In a carrier device in which a boss portion coupled to a rotating shaft is integrally formed, the carrier main body is formed by sintering, and at least one of a column component member including at least a column member and the plate. The column member is formed by welding a plate member formed separately from the column member, and the column member has a hollow portion formed therein, and a side surface on the rotation center side, A groove for guiding lubricating oil in the direction of the pinion shaft or the pinion gear supported by the pinion shaft is formed in the axial direction.
A notch is formed at the axial end of the groove so that the groove is
The carrier device of the planetary gear device and a serial pinion gear side, characterized in that it is communicating.