JPH073067Y2 - Annular plate material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an annular plate member incorporated in a clutch mechanism of an automobile.

[Conventional technology]

For example, in a multi-plate clutch for an automatic transmission of an automobile, a metal annular plate material is used as a separator plate or a core metal for a friction plate. Conventionally, this kind of plate material 1 has been manufactured by punching a metal flat plate 2 in an annular shape by a press cutter as shown in FIG. However, the remaining metal plate punched out in an annular shape has no use and has to be discarded, resulting in wasteful consumption of materials.

An annular plate material which eliminates such waste is disclosed in Japanese Patent Application Laid-Open No. 59-147128. In the one disclosed in the publication, as shown in FIG. 7 (a), a 1/4 circular arc plate 3 provided with a convex portion 3a and a concave portion 3b is punched from a metal flat plate 2, and as shown in FIG. 7 (b). The annular plate member 5 is manufactured by engaging the convex portions 3a and the concave portions 3b of the four arc plates 3 with each other.

[Problems to be solved by the invention]

The annular plate member 5 shown in FIG. 7 can considerably reduce material waste, but since there are meshing portions at several places, the meshing portions are easily disengaged even if a slight force is applied. Especially, it is easy to disassemble due to the force in the direction perpendicular to the surface. Since it is difficult to disassemble, if the dimensions of the meshing part are made tight, it will take time and effort for the meshing. In any case, there is a drawback that it is difficult to assemble the separator plate or to attach the core plate to the lining. There is also a problem that the mechanical strength of the finished product is weak.

Further, in both the annular plate member 1 shown in FIG. 6 and the annular plate member 5 shown in FIG. 7, since the metal flat plate 2 as a raw material has winding gusset because it is wound on a roll, it is necessary to correct it.

It is an object of the present invention to solve these drawbacks and problems, to provide an annular plate member which is easy to assemble, has sufficient mechanical strength, and which does not waste the raw material.

[Means for solving problems]

An annular plate material to which the present invention for achieving the above object is applied will be described with reference to the drawings corresponding to the embodiments.

The annular plate material of the present invention is used for a separator plate of a vehicle clutch or a core metal for a friction plate, and as shown in FIG. 1 (a), a plate-shaped metal plate 7 having a plate thickness inclined in the band width direction. Is curved in a band width direction having the thin plate side 7a as the inner circumference. As shown in FIG. 3B, the outer peripheral side of the annular plate member 8 extends to have a substantially uniform plate thickness. As shown in FIG. 3, both ends are provided with a convex portion 17a whose tip is located in the middle of the plate thickness direction and a concave portion 17b engaging with the convex portion 17a on the other side. The convex portion 17a and the concave portion 17b are mutually It meshes and is united.

[Action]

The strip-shaped metal plate 7 is stretched by pulling the thick side 7b and the plate thickness on the outer peripheral side of the annular plate member 8 is substantially equal to the plate thickness on the inner peripheral side 8a, so that the annular plate member 8 is a substantially uniform plate. Become thick. Even when compared with the annular plate material 1 manufactured by the method shown in FIG.
There is almost no difference in flatness and concentricity. Therefore, it can be used as a separate plate of a vehicle clutch or a core metal for a friction plate.

Both ends have a convex portion 17 that has a tip at one end in the middle of the plate thickness direction.
a is provided, and the other is provided with a recess 17b that engages with the protrusion 17a, and is engaged with the other. Therefore, if the metal plate 7 is once bent to have a diameter smaller than a desired diameter by plastic deformation, then both ends are slightly widened, and the two plates are engaged with each other by the force of the spring to return to the original state, even if a vertical force is applied to the annular surface. An annular plate material that does not come off and has no step on the annular surface can be easily obtained. There is no need to polish the steps.

On the other hand, unlike the annular plate member 5 manufactured by the method shown in FIG. 7, it is not a member in which a plurality of members are joined, so that sufficient strength can be obtained and joining is not troublesome.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The metal plate 7 shown in FIG. 1 (a) is a strip steel plate of S35C, the plate thickness of which is inclined in the width direction (see I-I cross section), and the thin side 7a.
Thickness 1.0mm, thick side 7b thickness 1.2mm, width 17mm, length 322.
It is 3 mm. At 300 ° C., both ends of the strip-shaped metal plate 7 are supported and curved into an arc in the direction of the arrow. As shown in FIG. 3, both ends have a convex portion 17a whose one end has a tip located in the middle of the plate thickness direction.
Is provided along the width direction of the annular plate member 14, and a groove-shaped concave portion 17b that engages with the convex portion 17a is provided at the other end along the width direction. Once the metal plate 7 is plastically deformed to a size smaller than the desired diameter, both ends are slightly widened, and the two springs are engaged with each other by the restoring force of the springs.
An integrated annular plate member 8 of 126.7Φmm × inner diameter 102.6Φmm × plate thickness 1.0 mm is manufactured. The unevenness of the plate surface of the formed annular plate member 8 is 0.
There was 2 mm. The annular plate member 8 is punched out by a press cutter, and as shown in FIG. 1 (c), an inner peripheral spline 9 is formed to complete a friction plate core metal 10. The core metal 10 is barrel-polished as necessary. Then, a lining is bonded to the core metal 10 to complete a friction plate (not shown). Both ends of the metal plate may be welded.

FIG. 2 shows another embodiment of the annular plate member which also constitutes the core metal 10 for the friction plate. The band-shaped metal plate 11 shown in FIG. 2 (a) has a spline 9 processed. If the spline 9 is curved in the direction of the arrow, as shown in FIG. Can be built.

FIG. 4 shows an example in which the inner circumference 8a of the annular plate member 8 shown in FIG. The convex portion 23a may be provided in advance on the strip-shaped metal plate material, and then the annular friction plate core bar 23 may be curved in this manner.

FIG. 5 shows an example in which the outer periphery is processed to have an uneven surface and the separate plate 24 is finished. In this example, the strip-shaped metal plate material is provided with the convex portions 24a in advance and then curved to finish the separate plate 24.

The annular plate material of the present invention can be used not only as a separator plate of a multi-plate clutch of an automatic transmission or a core plate for a friction plate, but also as a center plate of a so-called dry clutch.

[Effect of device]

As described above, the annular plate material of the present invention has a high material yield and can be manufactured at low cost. Also, even if it is an integral part, it does not mean that a plurality of members are spliced together, but both ends are meshed with a convex part having a tip in the middle of the plate thickness direction and a concave part that engages with it. It has high mechanical strength because it does not easily come off even when a vertical force is applied to it. In addition, it does not take time and effort to join them together. Since a step is unlikely to occur at the joint at both ends, the polishing work can be saved, and the work of assembling the separator plate of the multi-plate clutch or attaching it to the lining as a core bar becomes easy. Also,
In the conventional manufacturing by punching, burrs are easily generated and barrel polishing is required, but the annular plate material of the present invention can significantly reduce the number of barrel polishing steps.

[Brief description of drawings]

1 and 2 are perspective views showing an embodiment of an annular plate member to which the present invention is applied, FIG. 3 is a partial perspective view showing an embodiment of an annular plate member to which the present invention is applied, and FIG. 4 is a friction plate Front view of core metal,
FIG. 5 is a front view of the separator plate, and FIGS. 6 and 7 are views showing a conventional annular plate member. 1, 5, 8, 14 …… Annular plate material 8a …… Inner circumference 2 …… Metal flat plate, 3 …… Arc plate 3a ・ 17a …… Convex part 3b · 17b …… Recessed part 711 …… Strip metal plate 7a… … Thin side, 7b …… Thick side 9 …… Spline 10 ・ 23 …… Core plate for friction plate 24 …… Separator plate 23a ・ 24a …… Convex convex part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenaki Yasui 1141, Okawagahara, Iino, Fujioka-cho, Nishikamo-gun, Aichi Prefecture 1 Aisin Kako Co., Ltd. (72) Hideto Nakagawa Iino, Fujioka-cho, Nishikamo-gun, Aichi Prefecture Iino Okawagahara 1141-1 Aisin Kako Co., Ltd. (56) Reference JP 59-147128 (JP, A) JP 57-190741 (JP, A)

Claims (2)

[Scope of utility model registration request] 1. An annular plate member used for a separator plate of a vehicle clutch or a core metal for a friction plate, wherein a band-shaped metal plate having a plate thickness inclined in the band width direction has a thin plate side as an inner circumference. Circularly curved in the width direction, the outer circumference is stretched to have a substantially uniform plate thickness, and a convex portion whose tip is located in the middle of the plate thickness direction is provided on one of both ends and engages with the convex portion on the other. A concave portion is provided, and the convex portion and the concave portion are engaged with each other,
An annular plate material that is integrated. 2. The annular plate material according to claim 1, wherein at least one of the inner circumference and the outer circumference is uneven.