JP2861645B2 - Fluid transmission blades - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid transmission device blade.

[0002]

2. Description of the Related Art A fluid transmission device such as a torque converter and a fluid coupling used in an automatic transmission of a vehicle includes a shell in which a number of blade mounting grooves are formed substantially radially on an inner peripheral surface of a semi-annular member. And a number of blades each having a claw portion to be fitted in these blade mounting grooves. FIGS. 3 to 6 show examples of such conventional fluid transmission blades. The fluid transmission blade shown here has a first pawl 50a and a second pawl 50b,
Are formed by press working so as to cut and bend a part of each. That is, the blade 50
Is formed by cutting and bending (cutting and bending) the portions corresponding to the first and second claw portions 50a and 50b of the blade main body from a plate material by a press machine.
It is formed into a shape that projects obliquely from the blade body.
As shown in FIG. 4, the first pawl 50a on the shell axis C side
In the assembled state, the front end portion 50a1 of the cut and bent portion is cut and bent so as to point in the large-diameter outer peripheral direction (outward direction) of the semicircular ring of the shell 52, and the second claw portion 50b also The tip 50b1 is cut and bent so as to point outward. That is, when the blade 50 is assembled to the shell 52 as described later, the first and second pawls 50a and 50b are cut and bent so as to face outward. The shell 52 has a blade mounting groove 5 into which the both pawl portions 50a and 50b are fitted.
2a and 52b are formed respectively. These groove widths are set equal to the plate thickness of the blade 50. The blade 50 and the shell 52 are attached to each other with a mounting dimension w in FIG.
(The distance A from the shell axis C to the tip 50b1 of the second pawl, and the base 5 inside the first pawl from the shell axis C.
(The difference from the distance B to 0a2) is smaller on the shell 52 side, it is impossible to assemble. On the contrary, if it is larger, the blades 50 are more likely to fall off. It is desirable that the mounting dimension on the shell 52 side and the mounting dimension on the blade 50 side be equal (strictly speaking, the blade 50 is slightly elastically deformed in the mounted state) because of variations and variations in the performance of each fluid transmission device. Thus, it is necessary to slightly increase the w dimension on the blade 50 side).

[0003]

However, the conventional fluid transmission blades as described above have a problem in that the cost for assembling the blades to the shell is high. That is, when the first first portion 50a on the side of the shell axis is cut and bent, as shown in FIGS. 5 and 6, from the side ends p1 to p2 of the cut and bent portion, the twist (side end away from the cut and bent base) is performed. The larger the part p2 side, the greater the twist), which makes it difficult to measure the mounting dimension w accurately. Therefore, the mounting dimension on the shell 52 side is processed to a slightly larger dimension, and when the blade 50 is mounted on the shell 52 (or after the temporary mounting), the blade 50 is mounted on a predetermined position using a correction jig. Although such correction is conceivable, a correction jig is required, and since it takes time to assemble the blade 50, the assembling cost increases. An object of the present invention is to solve such a problem.

[0004]

SUMMARY OF THE INVENTION According to the present invention, in a state where the blade is opposed to the blade mounting groove of the shell, of the two pawls of the blade, the tip of the pawl on the shell axis side (inner side) is formed. The above-mentioned problem is solved by cutting and bending so as to face inward, and cutting and bending the nail portion on the side (outside) away from the shell axis so that the tip end thereof faces outward. That is, the blade (10) of the fluid transmission device of the present invention is formed by press-forming into a shape having two or more claws (10a, 10b) to be fitted on the inner peripheral surface of the shell (12). Of the two or more pawls (10a, 10b) of 10), the pawl (10a) closest to the shell axis is cut and bent so that the tip (10a1) of the pawl (10a1) faces the shell axis. The claws (10b) furthest away from the shell axis are cut and bent such that their tips (10b1) face the opposite side to the shell axis. It is preferable that the two claw portions (10a, 10b) cut and bent as described above are arranged such that their ends (10a1, 10b1) are parallel to each other. In addition, the code | symbol in a parenthesis shows the corresponding member of an Example.

[0005]

The blade is cut and bent from the main body by press working so that the tip of each claw portion faces inward for the inner portion and faces outward for the outer portion. Since the tip of each claw of the blade manufactured in this manner is less likely to be twisted, it is possible to accurately measure the mounting distance between both claw tip and manufacture the blade to a predetermined size. Further, even if the groove size of the shell is processed to a corresponding size, no trouble occurs. Therefore, the blade can be assembled at a predetermined position of the shell without variation without using a correction jig. If the distal ends of the two pawls are arranged so as to be parallel to each other, the distance between the pawls can be measured more accurately (than when they are not parallel).

[0006]

1 and 2 show an embodiment of the present invention. The blade 10 is press-formed from a long plate material into a predetermined shape by a forming die (not shown). That is, the blade 10
1 is formed such that a first claw portion 10a is cut at the lower right end in FIG. 1 and a second claw portion 10b is cut and bent at the lower left end in FIG. The first claw portion 10a has its tip portion 10a1 facing inward (substantially in the axial direction of the shell 12), and the second claw portion 10b has its tip portion 10b1 located on the outside (axial center of the shell 12). (The direction opposite to the direction). In the case of this embodiment, the first claw 10a and the second claw 10b are
Oa1 and 10b1 are cut and bent so as to be parallel to each other. The first claw 10a is cut and bent using the main body connecting portion remote from the distal end 10a1 as a bending base, and the second claw 10b is similarly cut and bent using the main body connecting portion remote from the distal end 10b1 as a bending base. Therefore, each tip surface is less likely to be twisted. Therefore, it is possible to accurately measure the mounting distance w (the distance indicated by AB in FIG. 2) between the two tip portions. Accordingly, the mounting distance between the two grooves on the shell 12 (similar to the conventional shell 52 shown in FIG. 3) is the same as the mounting distance w of the blade 10.

Next, a procedure for assembling the blade 10 thus manufactured into the shell 12 will be described. From the state where the blade 10 is positioned on the blade mounting groove of the shell 12, the first pawl 10a is fitted into the inner blade mounting groove. Next, the second claw portion 10b is fitted into the outer blade mounting groove while slightly deforming the blade 10 elastically. Thus, the blade 10 is connected to the shell 1
After the temporary assembling, the upper part of the blade 10 in FIG. 1 is lightly tapped with a hammer and driven into the shell 12 to a predetermined position to perform final assembling. The mounting distance on the shell 12 side is the same as the mounting distance w on the blade 10 side (strictly, a slightly larger dimension on the blade 10 side), so that the mounting position for each blade does not vary, and therefore, The performance of the fluid transmission can be prevented from varying.

[0008]

As described above, according to the present invention, the work of assembling the blade of the fluid transmission device to the shell can be performed in a short time, and the mounting position of the blade does not vary. Therefore, a fluid transmission device with stable performance can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a view of a blade of the present invention as viewed from the direction of arrow 1 in FIG. 2;

FIG. 2 is a diagram showing an arrangement relationship of a claw portion of a blade of the present invention together with a shell.

FIG. 3 is a view of a conventional blade and shell as viewed from the direction of arrow 3 in FIG. 4;

FIG. 4 is a diagram showing a positional relationship between a conventional blade and a shell.

FIG. 5 is an enlarged view showing a twisted state of a conventional blade.

6 is a view as seen from the direction of arrow 6 in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Blade 10a 1st 1st part 10a1 Tip 10b 2nd 2nd part 10b1 Tip 12 Shell

Continuation of the front page (72) Inventor Makoto Umezawa Nissan Motor Co., Ltd., 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture (56) References JP-A-4-92146 (JP, A) , A) JP-A-57-47587 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16H 41/28 F16H 41/26 F16D 33/18-33/20

Claims (2)

(57) [Claims] 1. A blade of a fluid transmission device such as a torque converter or a fluid coupling, which is press-formed into a shape having two or more claws to be fitted on an inner peripheral surface of a shell, wherein the two blades are used. Of the claws described above, the claws on the side closest to the shell axis are cut and bent so that the tip end faces the shell axis side, and the claws on the side farthest from the shell axis are A blade of a fluid transmission device, wherein a tip portion is cut and bent so as to face a side opposite to a shell axis side. 2. The blade of the fluid transmission device according to claim 1, wherein the two claw portions cut and bent as described above are arranged such that their tip sides are parallel to each other.