JPH0842659A - Cover for torque converter and manufacture thereof - Google Patents

Abstract

PURPOSE:To integrally caulk a separately arranged pilot boss to a cover body for torque converter. CONSTITUTION:A torque converter E comprises a cover body 10 for a torque converter having a torque converter protruded to a given position; a pilot boss 20 inserted in the guide boss 13 of a cover body 10 for the torque converter. A lock means 20b is arranged inside the pilot boss 20. By caulking the guide boss 13 to the lock means 20b, a cover body 10 for the torque converter is formed integrally with the pilot boss 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torque converter cover mounted on the front side of a vehicle torque converter, that is, on the engine side, and a method for manufacturing the same.

[0002]

2. Description of the Related Art FIG. 12 shows a conventional example of a torque converter cover, in which a torque converter cover main body 2 of a torque converter cover 1 serves as a reference when a drive plate (not shown) is mounted. Are integrally fixed by arc welding.

FIG. 13 shows another conventional example of the torque converter cover. The torque converter cover body 5 of the torque converter cover 4 is integrally formed with a pilot boss 6 by deep drawing. ing.

In FIGS. 12 and 13, reference numeral 7 denotes a drive plate mounting boss.

[0005]

However, in the former torque converter cover 1, welding distortion occurs in the pilot boss 3 due to arc welding, and it is therefore necessary to cut the inner and outer diameter surfaces of the pilot boss 3. There is a problem that the manufacturing cost becomes high. Further, a high level of welding technology is required, and in the case of poor welding, the attachment strength of the pilot boss 3 is insufficient, which may deteriorate the quality of the torque converter cover 1.

Further, the latter torque converter cover 4
Then, the number of pressing steps for deep-drawing the pilot boss 6 becomes very large, which inevitably increases the die cost and eventually the manufacturing cost. Further, since the volume of the pilot boss 6 is reduced from the initial step, there is a risk that the flat surface or the like will have a narrowing flaw, the dimensional accuracy will deteriorate, and the quality will deteriorate. Further, since the pilot boss 6 is integrally molded, it is necessary to completely change the torque converter cover 4 when changing the specifications of the torque converter cover 4, which is not suitable for high-mix low-volume production.

The present invention has been made to solve the above-mentioned problems of the prior art. The object of the present invention is to separately caulk a separately provided pilot boss to a torque converter cover body. A torque converter cover and a method for manufacturing the same are provided.

[0008]

To achieve the above object, in a torque converter cover according to a first aspect of the present invention, a torque converter cover main body having a guide boss projecting at a predetermined position, and the torque converter cover body are provided. The pilot boss is inserted into the guide boss of the cover body, and locking means is provided inside the pilot boss. By caulking the guide boss to the locking means, the torque converter for the torque converter is formed. The feature is that the cover body and the pilot boss are integrated.

Further, in the torque converter cover according to the present invention, the locking means of the pilot boss is a convex portion projecting on the inner peripheral surface of the pilot boss in the vicinity of the contact surface of the torque converter cover body. I am trying.

Further, in the torque converter cover of the third aspect, the torque converter cover main body is provided with a guide boss projecting at a predetermined position, and the pilot boss is inserted into the guide boss of the torque converter cover main body. A locking means is provided at a position corresponding to the outer surface of the pilot boss of the torque converter cover body, and the pilot boss and the torque converter cover body are integrated by this locking means. There is.

In the torque converter cover according to the present invention, the locking means of the torque converter cover body is:
It is characterized in that it is a caulking portion provided at a position corresponding to the outer surface of the pilot boss of the torque converter cover body.

Further, in the torque converter cover manufacturing method according to the present invention, after the guide boss is provided at a predetermined position of the torque converter cover body, the locking means is provided inside the projecting guide boss. It is characterized in that the pilot boss is inserted, and then the outer end of the guide boss is pressed to integrate the locking means of the pilot boss with the guide boss.

According to the sixth aspect of the present invention, there is provided a torque converter cover manufacturing method, wherein a guide boss is provided at a predetermined position of the torque converter cover body, and the pilot boss is inserted outside the guide boss in the next step. After the locking means is provided at the position corresponding to the outer surface of the pilot boss, the inner peripheral surface of the pilot boss is inserted into the guide boss. It is characterized in that it is integrated with the converter cover body.

[0014]

According to the torque converter cover and the manufacturing method thereof according to claims 1, 2, and 5, the pilot boss is fixed to the torque converter cover body by caulking the guide boss.

Further, according to the torque converter cover and the manufacturing method thereof according to claims 3, 4 and 6, the pilot boss is fixed to the torque converter cover body by caulking the locking means.

According to the torque converter cover and the method of manufacturing the same of the above claims, the separately provided pilot boss can be integrally fixed to the torque converter cover body by caulking. As a result, the manufacturing process can be simplified by eliminating the welding process, and the cutting work of the pilot boss due to welding distortion can be eliminated, so that the manufacturing cost can be reduced.

Further, since the specifications of the torque converter cover can be changed only by changing the pilot boss, it is possible to very easily cope with small-lot production of a wide variety of products.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described based on the embodiments shown in the drawings.

1 to 3 relate to a first embodiment of the present invention, and FIG. 1 is a sectional explanatory view of a torque converter cover,
FIG. 2 is an enlarged explanatory view of a part A in FIG. 1, and FIG. 3 is an explanatory view showing a manufacturing process of the torque converter cover.

In the figure, E is a torque converter cover, a torque converter cover main body 10 having a guide boss 13 projecting at a predetermined position, and a pilot boss inserted into the guide boss 13 of the torque converter cover main body 10. 20 and a locking means 20b is provided inside the pilot boss 20.
It is characterized in that the torque converter cover main body 10 and the pilot boss 20 are integrated by caulking the guide boss 13 to 0b.

Further, the structure of the first embodiment according to the present invention will be described in detail.

The torque converter cover body 10 is formed of a metal plate, and comprises a disc-shaped web portion 11 and a ring-shaped rim portion 12 formed concentrically on the outer peripheral edge of the web portion 11. ing. Further, in the vicinity of the outer peripheral edge of the web portion 11, a plurality of drive plate mounting bosses 16 are fixed along the circumferential direction.

The guide boss 13 is composed of a bottomed cylindrical body 13a protruding from the center of the web portion 11 as shown by an imaginary line, and the top surface of the cylindrical body 13a is pressed and caulked. The bulging portion 13b is formed.

The pilot boss 20 has a cylindrical shape, and a flange portion 20a is formed at a position corresponding to the contact surface of the torque converter cover body 10, and the inside of the pilot boss 20, for example, the torque converter cover body 10 contact surface. A convex portion 20b serving as a locking means is formed on the entire inner peripheral surface in contact with the whole area in the circumferential direction. The inner diameter of the convex portion 20b is set to be slightly smaller than the diameter of the cylindrical body 13a of the guide boss 13 by the press fitting margin.

The pilot boss 20 is press-fitted into the cylindrical body 13a of the guide boss 13 such that its flange portion 20a is in contact with the web portion 11, and the cylindrical body 13
The convex portion 20b is pressed by the bulging portion 13b formed by crimping the top surface of a. As a result, the pilot boss 20 is integrally fixed to the torque converter cover body 10.

Next, a method of manufacturing the torque converter cover E according to the first embodiment will be described.

The torque converter cover E according to this embodiment is manufactured by the torque converter cover body 10.
After projecting the guide boss 13 at a predetermined position, the pilot boss 20 having the convex portion 20b as a locking means inside is inserted into the projecting guide boss 13, and after that,
It is characterized in that the convex end 20b of the pilot boss 20 and the guide boss 13 are integrated by pressing the outer end of the guide boss 13.

Further, a method of manufacturing the torque converter cover E according to the first embodiment will be described in detail with reference to FIG.

First, as shown in FIG. 3A, the center of the web portion 11 of the torque converter cover body 10 is clamped by the punching die 30 and the stripper 31.

Then, as shown in FIGS. 3B and 3C, the cylindrical body 13a of the guide boss 13 is formed by the punch 32.

Then, as shown in FIG.
0b and the pilot boss 20 to the flange portion 20a
Is pressed into the cylindrical body 13a of the guide boss 13 so as to come into contact with the web portion 11.

Then, as shown in FIG. 3 (e), the cylindrical body 13a of the guide boss 13 is pressed by the caulking punch 33 and caulked to form the bulging portion 13b. As a result, the pilot boss 20 becomes the torque converter cover body 10
To be integrally fixed to the torque converter cover E to complete the torque converter cover E.

In the first embodiment, the convex portion 20b serving as the locking means for the pilot boss 20 is formed over the entire area in the circumferential direction, but as shown in FIGS. 4 and 5, along the circumferential direction. For example, six pieces may be provided partially at predetermined intervals. Also, the guide boss 1
As a modified example of No. 3, as shown in FIG. 6, a boss out volume part 13c may be provided.

According to the above-described first embodiment, the pilot boss 20 can be integrally fixed to the torque converter cover body 10 by caulking the guide boss 13. As a result, the welding process can be eliminated and the manufacturing process can be simplified, and the cutting work of the pilot boss 20 due to welding distortion can be eliminated, and the manufacturing cost can be reduced.

Further, since the specifications of the torque converter cover E can be changed only by changing the pilot boss 20, it is possible to cope with small lot production of a wide variety of products very easily. Further, the flange portion 20a enlarges the contact surface of the torque boss cover body 10 of the pilot boss 20, and the fixing performance of the pilot boss 20 can be improved.

7 to 9 relate to a second embodiment of the present invention. FIG. 7 is a sectional explanatory view of a torque converter cover, FIG. 8 is an enlarged explanatory view of a portion B of FIG. 7, and FIG. 9 is a torque converter cover. It is explanatory drawing which shows a part of manufacturing process, and attaches | subjects the same code | symbol to the same component as 1st Example, and demonstrates it.

A torque converter cover E according to the second embodiment is inserted into a torque converter cover body 10A having a guide boss 13 projecting at a predetermined position and a guide boss 13 of the torque converter cover body 10A. The pilot boss 20A is provided with a convex portion 20b as a locking means inside the pilot boss 20A. The convex portion 20b integrates the guide boss 13 and the pilot boss 20A, and further A caulking portion 15 serving as a locking means is provided at a position corresponding to the outer surface of the pilot boss 20A of the converter cover body 10A, and the caulking portion 15 is caulked to the pilot boss 20A side to thereby form the pilot boss 20A and the torque converter cover body 10A. It is characterized by integrating.

Further, the structure of the second embodiment according to the present invention will be described in detail.

The pilot boss 2 is attached to the portion of the torque converter cover body 10A that is in contact with the pilot boss 20A.
The recess 14 into which 0A fits is formed.
4, a caulking portion 15 is provided so as to project over the entire area in the circumferential direction. Further, a caulking locking portion 20c is provided over the entire area in the circumferential direction at a position of the pilot boss 20 facing the caulking portion 15 of the torque converter cover body 10A.

Next, a method of manufacturing the torque converter cover E according to the second embodiment will be described.

The torque converter cover E according to this embodiment is manufactured by the torque converter cover body 10.
A guide boss 13 is projected at a predetermined position of A, and
After the caulking portion 15 is provided outside the guide boss 13 at a position corresponding to the outer surface of the pilot boss 20A to be inserted in the next step, the inner peripheral surface of the pilot boss 20A having the convex portion 20b as a locking means on the inner side. The guide boss 13 is inserted, and the pilot boss 20A outer surface is caulked.
Then, the outer end of the guide boss 13 is pressed to integrate the convex portion 20b of the pilot boss 20A with the guide boss 13, and the caulking portion 15 is caulked to the outer surface of the pilot boss 20A and the torque converter. It is characterized in that it is integrated with the cover main body 10A.

Further, in the method of manufacturing the torque converter cover E according to the second embodiment, the points different from the first embodiment will be described in detail.

As shown in FIG. 9A, the guide boss 13 is formed on the web portion 11 of the torque converter cover body 10A.
After molding the cylindrical body 13a, the extrusion punch 34 forms a ring-shaped recess 14 into which the pilot boss 20A fits in a portion of the torque converter cover body 10A that is in contact with the pilot boss 20A, and the recess 14 is continuous with the recess 14. Then, the caulking portion 15 is provided so as to project over the entire area in the circumferential direction.

Then, as shown in FIG. 9 (b), the pilot boss 20A is inserted into the guide boss 13 as in the first embodiment, and the caulking punch 33 presses the top surface of the guide boss 13 to caulk the bulging portion. 13b is molded, whereby the convex portion 20b of the pilot boss 20A and the guide boss 13 are integrated. After that, the caulking portion 1 is pressed by the caulking punch 35.
5, the caulking portion 15 and the caulking locking portion 20c of the pilot boss 20A are integrated, that is, the torque converter cover body 10A and the pilot boss 20A are integrated.

According to the second embodiment described above, the pilot boss 20A is fixed to the torque converter cover body 10 by crimping the crimp portion 15 in addition to the guide boss 13.
Since it is integrally fixed to A, the pilot boss 20A
The fixing force can be made stronger than in the case of the first embodiment.

Further, the caulking portion 15 can be easily formed by the concave portion 14, and the caulking operation of the caulking portion 15 can be easily performed by the caulking locking portion 20c.

FIGS. 10 and 11 relate to a third embodiment of the present invention. FIG. 10 is a sectional explanatory view of a torque converter cover, FIG. 11 is an enlarged explanatory view of portion C of FIG. 10, and a second embodiment. The same parts as those in FIG.

The torque converter cover E according to the third embodiment is inserted into the torque converter cover body 10B in which a guide boss 13B is provided in a predetermined position and the guide boss 13B of the torque converter cover body 10B. The pilot boss 20B and the pilot boss 20B are provided with a caulking portion 15 as a locking means at a position corresponding to the outer surface of the pilot boss 20B of the torque converter cover body 10B. It is characterized in that it is integrated with the converter cover body 10B.

Further, the structure of the third embodiment according to the present invention will be described in detail.

The pilot boss 13B is formed lower than the guide boss 13 of the first and second embodiments, and the cylindrical body 1
Only 3a. Along with this, pilot boss 2
The convex portion 20b as a locking means is not formed on the inner peripheral surface of 0B. In addition, the torque converter cover body 10
A concave portion 14 and a caulking portion 15 similar to those of the second embodiment are formed in the portion corresponding to the B pilot boss 20B contacting portion.

The other structure is similar to that of the second embodiment.
The description is omitted.

In the method of manufacturing the torque converter cover E according to the third embodiment, the guide boss 13B is provided at a predetermined position of the torque converter cover main body 10B, and the guide boss 13B is provided outside the guide boss 13B. After the caulking portion 15 is provided at a position corresponding to the outer surface of the pilot boss 20B inserted in the process, the inner peripheral surface of the pilot boss 20B is inserted into the guide boss 13B, and the outer surface of the pilot boss 20B is attached to the caulking portion 15. After inserting, and then caulking the caulking portion 15, the caulking locking portion 20c on the outer surface of the pilot boss 20B and the torque converter cover body 1
It is characterized in that it is integrated with 0B, and the details thereof are the same as those shown in the second embodiment, and the explanation thereof will be omitted.

[0053]

As described above, according to the torque converter cover and the manufacturing method thereof according to the present invention, the separately provided pilot boss can be integrally fixed to the torque converter cover main body by caulking. As a result, the manufacturing process can be simplified by eliminating the welding process, and the cutting work of the pilot boss due to welding distortion can be eliminated, so that the manufacturing cost can be reduced.

Further, since the specifications of the torque converter cover can be changed simply by changing the pilot boss, it is possible to cope with small lot production of a wide variety of products very easily.

[Brief description of drawings]

FIG. 1 is an explanatory cross-sectional view of a torque converter cover according to a first embodiment of the present invention.

FIG. 2 is an enlarged explanatory view of a part A in FIG.

FIG. 3 is an explanatory diagram showing a manufacturing process of the torque converter cover shown in FIG. 1.

FIG. 4 is an explanatory plan view showing a modification of the pilot boss shown in FIG.

5 is a cross-sectional view taken along the line VV of FIG.

6 is a cross-sectional explanatory view showing a modified example of the guide boss shown in FIG.

FIG. 7 is a cross-sectional explanatory view of a torque converter cover according to a second embodiment of the present invention.

8 is an enlarged explanatory view of a part B in FIG.

FIG. 9 is an explanatory view showing a part of the manufacturing process of the torque converter cover shown in FIG. 6.

FIG. 10 is a sectional explanatory view of a torque converter cover according to a third embodiment of the present invention.

FIG. 11 is an enlarged explanatory diagram of a C part in FIG. 9;

FIG. 12 is a cross-sectional explanatory view of a torque converter cover according to a conventional example.

FIG. 13 is a cross-sectional explanatory view of a torque converter cover according to another conventional example.

[Explanation of symbols]

 E Torque Converter Cover 10 Torque Converter Cover Main Body 10A Torque Converter Cover Main Body 10B Torque Converter Cover Main Body 13 Guide Boss 13B Guide Boss 13a Cylindrical Body 13b Swelling Part 15 Locking Means (Caulking Part) 20 Pilot Boss 20A Pilot Boss 20B Pilot boss 20a Flange portion 20b Locking means (projection) 20c Caulking lock portion

Claims (6)

[Claims] 1. A torque converter cover main body having a guide boss projecting from a predetermined position, and a pilot boss inserted into the guide boss of the torque converter cover main body. A torque converter cover characterized in that stop means are provided, and the guide boss is caulked to the locking means to integrate the torque converter cover main body and the pilot boss. 2. The torque converter according to claim 1, wherein the locking means of the pilot boss is a convex portion projecting on the inner peripheral surface of the pilot boss near the contact surface of the torque converter cover body. cover. 3. A torque converter cover main body having a guide boss projecting from a predetermined position, and a pilot boss inserted into the guide boss of the torque converter cover main body.
A locking means cover is provided at a position corresponding to an outer surface of the pilot boss, and the pilot boss and the torque converter cover body are integrated by the locking means. 4. The torque converter cover according to claim 3, wherein the locking means of the torque converter cover main body is a caulking portion provided at a position corresponding to an outer surface of the pilot boss of the torque converter main body. . 5. A guide boss is provided at a predetermined position of a torque converter cover main body, and a pilot boss having locking means inside is inserted into the projecting guide boss. A method of manufacturing a cover for a torque converter, characterized in that the locking means of the pilot boss and the guide boss are integrated by pressing the outer end of the cover. 6. After providing a guide boss at a predetermined position of the torque converter cover main body and providing a locking means at a position corresponding to the outer surface of the pilot boss to be inserted in the next step outside the guide boss. The inner peripheral surface of the pilot boss is inserted into the guide boss, and then the locking means is caulked so that the outer surface of the pilot boss and the torque converter cover body are integrated with each other. Method of manufacturing cover for torque converter.