JP2520475Y2 - Stator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to improvement of a stator used in an automatic transmission or the like.

[Prior Art] Conventionally, as shown in FIG. 10 and FIG. 11, there is known a stator including a stator body 1 made of a resin material and provided with blades 3 between the stator body 1 and the outer ring 2. ing.

The stator body 1 made of a resin material is provided with an annular plate portion 5 on the inner peripheral side near one end in the axial direction of the tubular portion 4, and a plurality (7 in the figure) of oil grooves 7 are provided on the outer end surface 6 of the plate portion 5. Are provided radially. This stator is rotatably mounted inside the automatic transmission, and generates a flow of oil inside the transmission by a pump action accompanying rotation of the blades 3. Most of the oil circulates in the direction of arrow A through the blades 3,
Some oil flows in the direction of arrow B to lubricate the one-way clutch. The oil groove 7 provided in the plate portion 5 is for guiding the flow in the B direction.

A one-way clutch (not shown) is attached to the inner circumference of the tubular portion 4 of the stator, and the stator is axially supported via the clutch.

Therefore, it is necessary to appropriately lubricate this clutch, and for this reason, the plate portion 5 is provided with an oil hole 8 penetrating in the thickness direction thereof. The oil hole 8 opens on the bottom surface of the oil groove 7 and branches a part of the flow in the B direction in the C direction.

[Problems to be Solved by the Invention] The stator main body 1 is generally formed of a phenol resin, and therefore has a problem of large thermal contraction when exposed to a high temperature atmosphere.

For this reason, the inventors first considered inserting the outer race of the one-way clutch into the inner circumference of the tubular portion 4 to prevent heat shrinkage of the tubular portion 4. A large stress is generated, and this stress concentrates particularly on the oil hole 8 portion.
There is a problem that cracks occur at the periphery of the oil hole 8.

[Means for Solving the Problems] In view of the above points, the present invention aims to prevent the occurrence of cracks due to concentration of stress. As shown in
An annular plate portion is provided on the inner peripheral side near one end of the tubular portion in the axial direction, and a stator body made of a resin material having a plurality of oil grooves radially provided on the outer end surface of the plate portion is provided, and the plate portions are adjacent to each other. An oil hole penetrating the plate portion in the thickness direction is provided in the thick portion between the oil grooves, the oil hole is arranged adjacent to the oil groove, and a part of the oil hole communicates with the oil groove. I decided to do it.

Further, the stator according to claim 2 of the present application is the stator according to claim 1, wherein the opening shape of the oil hole is “a shape in which the outer shape of the elliptical shape in which the major axis is arranged in the radial direction of the plate portion is tapered”. I decided.

A stator according to claim 3 of the present application is made of a resin material in which an annular plate portion is provided on the inner peripheral side near one axial end of the tubular portion, and a plurality of oil grooves are radially provided on the outer end surface of the plate portion. The stator body is provided, and a notch that communicates with the oil groove via the surface of the outer end surface is provided at the inner diameter edge of the thick portion between the oil grooves adjacent to each other of the plate portion.

A stator according to claim 4 of the present application provides an annular plate portion on the inner peripheral side near one end in the axial direction of the tubular portion, and a plurality of oil grooves are radially provided on the outer end surface of the plate portion, and the plate portion is provided. Penetrate the plate portion in its thickness direction,
A stator main body made of a resin material, which is disposed adjacent to the oil groove, and a part of which communicates with the oil groove, is made of a resin material, and is bonded to the inner diameter side of the tubular portion, and one end surface thereof is A ring member made of metal adhered to the plate portion is provided, and unevenness is provided on one end surface of the ring member formed flat so as to have the same circumferential arrangement as the oil holes.

Further, according to claim 5 of the present application, an annular plate portion is provided on the inner peripheral side near one end in the axial direction of the tubular portion, and a plurality of oil grooves are radially provided on the outer end surface of the plate portion. A stator main body made of a resin material having a notch communicating with the oil groove on the inner diameter edge through the surface of the outer end surface, and a metal adhered to the inner diameter side of the cylindrical portion, and one end surface of which is adhered to the plate portion. The ring member is made flat, and the one end surface of the ring member that is formed flat is provided with concavities and convexities with the same arrangement in the circumferential direction as the notch.

[Operation] In the above-mentioned conventional technique, the reason why cracks are likely to occur at the peripheral edge of the oil hole 8 is that the oil hole 8 is opened in the thinnest oil groove 7 portion of the plate 5.

On the other hand, in the stator according to claim 1 of the present application, since the oil hole is provided in the thick portion other than the oil groove in the plate portion, it is possible to enhance the mechanical strength of the periphery of the oil hole. .

It is more effective to prevent cracks from occurring when the opening shape of the oil hole is set to "a shape in which the outer shape of the elliptical shape in which the major axis is arranged in the radial direction of the plate portion is tapered" rather than making it a perfect circle. There is (claim 2).

That is, when the opening shape of the oil hole is a perfect circle as in the conventional case, a large weld is likely to be formed near the oil hole due to the flow direction of the resin material when the stator body is molded, and the existence of this large weld exists. This was one of the causes of cracks, but this time, in the present invention, the opening shape of the oil hole is set to "a tapered shape on the outer side of the ellipse in which the major axis is arranged in the radial direction of the plate portion". It has been found that, by doing so, the weld generated can be made small and the mechanical strength of the portion can be increased.

Further, in place of the conventional oil hole, a notch for introducing oil is provided on the inner diameter edge of the plate portion, and this notch is provided in the thick portion other than the oil groove in the plate portion, similar to the oil hole in claim 1. And, it is possible to set the mechanical strength of the notch peripheral edge to be high.

If the metal ring member (including the outer race of the one-way clutch, etc.) that is integrated with the stator body by insert molding is arranged in the circumferential direction to be the same as an oil hole or notch, and if unevenness is provided, It is possible to suppress thermal contraction of the stator body in the portion provided with the unevenness (claims 4 and 5).

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2 according to the first embodiment, an oil hole 8 provided in the plate portion 5 of the stator body 1 has a thick portion 9 between two oil grooves 7, 7 adjacent to each other. Is provided at a position slightly displaced in the circumferential direction from one of the oil grooves 7, and most of the peripheral edge thereof has a large thickness, and a groove-shaped communication passage opening in a part in the circumferential direction is used. By communicating with the oil groove, the mechanical strength of the peripheral edge of the oil hole 8 is enhanced.

Therefore, according to this stator, since the mechanical strength of the periphery of the oil hole 8 is increased, it is possible to prevent the occurrence of cracks here.

A communication passage 10 is provided from one oil groove 7 to the oil hole 8 as a part of the peripheral edge of the oil hole 8, whereby a part of the oil flowing in the oil groove 7 is part of the oil hole 8. Has been introduced smoothly.

The opening shape of the oil hole 8 is, as shown in the drawing, the “plate portion 5
The outer shape of the elliptical shape in which the major axis is arranged in the radial direction is tapered. ”This makes it difficult for cracks to occur.

That is, as shown in FIG. 3 (A), when the opening shape of the oil hole 8 is a perfect circle, the oil hole 8 is formed from the relationship of the flow direction (arrow direction) of the resin material when the stator body 1 is molded. A large weld 11 was apt to be formed on the downstream side of the weld, and the weld 11 was burned with gas to weaken the mechanical strength of the portion, which easily caused cracks. As shown in FIG. 2B, the resin material is smoothed by forming the oil holes 8 into “a shape in which the outer shape of the elliptical shape in which the major axis is arranged in the radial direction of the plate portion 5 is tapered”. The resulting weld 11 is small in size due to the merging with the above, so that the mechanical strength of the portion is increased.

Therefore, it is possible to prevent the occurrence of cracks due to the occurrence of large welds 11.

In FIGS. 4 and 5 according to the second embodiment, the oil hole 8 is provided substantially in the center between the two oil grooves 7, 7, and the opening shape is “diameter of the plate portion 5”. The outer shape of the elliptical shape with the major axis arranged in the direction is tapered. "

In FIGS. 6 and 7 according to the third embodiment, the plate 5 of the stator body 1 is not provided with an oil hole, and instead of this oil hole, the thickness between the oil grooves 7, 7 adjacent to each other is set. A notch 12 communicating with the oil groove 7 through the surface of the outer end face 6 is provided on the inner diameter edge of the meat portion 9, and a part of the oil is used as the notch 12
It will be introduced to the clutch side.

Therefore, according to this stator, since the mechanical strength of the peripheral edge of the notch 12 is set to be high, it is possible to prevent the occurrence of cracks here. In the valley of notch 12,
It is desirable to add a radius so that the concentration of stress can be further alleviated.

When molding the stator body 1 shown in each of the above-mentioned embodiments, the metal ring member such as the outer race of the one-way clutch is integrated by insert molding.

Further, as shown in FIGS. 8 and 9, by providing unevenness 15 such as a fine groove on one end surface 14 of the ring member 13 formed flat, the adhesion between the metal material and the resin material is strengthened and the resin is strengthened. It is possible to suppress heat shrinkage of the material and prevent cracks from occurring. The unevenness 15 is arranged in the same circumferential direction with respect to the oil hole 8 or the notch 12, so that the contraction preventing action can be concentrated. This unevenness 15
For example, it is formed by knurling.

[Effects of the Invention] The present invention has the following effects.

That is, in the stator according to claim 1, most of the peripheral edge of the oil hole is provided in the thick portion between the oil grooves adjacent to each other in the plate portion, except for a part in the circumferential direction, It is possible to increase the mechanical strength of the peripheral edge of the oil hole, which can prevent the occurrence of cracks due to the concentration of stress.

Further, in the stator according to claim 2, the stator according to claim 1
The opening shape of the oil hole in "is a shape in which the outer side of the elliptical shape in which the major axis is arranged in the radial direction of the plate portion is tapered"
Therefore, the weld generated at the time of molding the stator main body can be made small to increase the mechanical strength of the portion, and thereby the generation of cracks due to the generation of a large weld can be prevented.

Further, in the stator according to the third aspect, the notch is provided in the thick portion other than the oil groove in the plate portion instead of the oil hole, so that the mechanical strength of the notch peripheral edge can be set high. Therefore, it is possible to prevent the occurrence of cracks due to the concentration of stress.

Further, in the stator according to claims 4 and 5, since the metal ring member integrated with the stator body by insert molding is provided with local unevenness, the heat of the stator main body is provided at the unevenness portion. It is possible to suppress shrinkage, which can prevent the occurrence of cracks due to the occurrence of large thermal shrinkage.

[Brief description of drawings]

1 is a partial front view of a stator according to a first embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along line II-II in FIG. 1, and FIG.
(A) and (B) are explanatory views showing the opening shape of the oil hole and the flow of the resin material, FIG. 4 is a partial front view of the stator according to the second embodiment of the present invention, and FIG. 6 is an enlarged sectional view taken along line VV in FIG. 6, FIG. 6 is a partial front view of a stator according to a third embodiment of the present invention, FIG. 7 is an enlarged sectional view taken along line VII-VII in FIG. 6, and FIG. Partial front view of the metal ring member, FIG. 9 is an enlarged sectional view taken along line IX-IX in FIG. 8, FIG. 10 is a front view of a stator according to a conventional example, and FIG. 11 is a sectional view of the stator. . 1 ... Stator body, 2 ... Outer ring 3 ... Blades, 4 ... Cylindrical part 5 ... Plate part, 6 ... Outer end face 7 ... Oil groove, 8 ... Oil hole 9 ... Thick part, 10 …… communication passage 11 …… weld, 12 …… notch 13 …… metal ring member, 14 …… one end surface 15 …… unevenness

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-64-65363 (JP, A) Actually opened 62-183156 (JP, U) Actually opened 61-140251 (JP, U) Actual public 55- 48213 (JP, Y2)

Claims (5)

(57) [Scope of utility model registration request] 1. An annular plate portion (5) is provided on an inner peripheral side of the tubular portion (4) near one axial end thereof, and a plurality of oil grooves (7) are provided on an outer end surface (6) of the plate portion (5). A stator main body (1) made of a resin material that is provided radially, and the plate portion (5) is thickened in a thick portion between the oil grooves (7, 7) adjacent to each other of the plate portion (5). An oil hole (8) penetrating in the depth direction is provided, the oil hole (8) is arranged adjacent to the oil groove (7), and a part of the oil hole (8) communicates with the oil groove (7). Stator characterized by. 2. The stator according to claim 1, wherein an oil hole (8) is provided.
The stator is characterized in that the opening shape thereof is "a shape in which the outer diameter side of an ellipse in which the major axis is arranged in the radial direction of the plate portion (5) is tapered". 3. An annular plate portion (5) is provided on the inner peripheral side near one axial end of the tubular portion (4), and a plurality of oil grooves (7) are formed on the outer end surface (6) of the plate portion (5). And a stator main body (1) made of a resin material, which is provided radially, at the inner peripheral edge of the thick portion (9) between the oil grooves (7) and (7) adjacent to each other in the plate portion (5), A stator provided with a notch (12) communicating with the oil groove (7) through the surface of the outer end surface (6). 4. An annular plate portion (5) is provided on the inner peripheral side of the tubular portion (4) near one end in the axial direction, and a plurality of oil grooves (7) are provided on the outer end surface (6) of the plate portion (5). Are radially provided, penetrate the plate portion (5) in the thickness direction of the plate portion (5), and are arranged adjacent to the oil groove (7), and a part of the oil groove (7) is provided. A resin-made stator main body (1) having an oil hole (8) communicating with the cylindrical portion (4)
And a ring member (13) made of metal that is bonded to the inner diameter side of the ring member and has one end surface (14) bonded to the plate portion (5), and the one end surface (14) of the ring member (13) formed flat ), The arrangement of the oil holes (8) in the circumferential direction is the same as the oil holes (8), and the concavities and convexities (15) are provided in the stator. 5. An annular plate portion (5) is provided on the inner peripheral side near one axial end of the tubular portion (4), and a plurality of oil grooves (7) are provided on the outer end surface (6) of the plate portion (5). And a notch (12) communicating with the oil groove (7) through the surface of the outer end surface (6) at the inner diameter edge of the plate portion (5) and the stator body (1) made of a resin material. ) And a metal ring member (13) adhered to the inner diameter side of the tube portion (4) and having one end surface (14) thereof bonded to the plate portion (5), the ring formed flat. A stator characterized in that an uneven surface (15) is provided on one end surface (14) of a member (13) in the same circumferential arrangement as the notch (12).