JPH0868455A - Pulley clutch and manufacturing method thereof - Google Patents

Abstract

(57) [Abstract] [Purpose] A pulley clutch in which a pulley clutch main body is formed by plastic working from a thin metal plate, and a magnetic flux absorbing ring constituting a magnet accommodating space is integrally fixed to the pulley clutch main body, and a manufacturing method thereof. I will provide a. A pulley clutch according to the present invention comprises a pulley clutch main body 10 formed by plastically working a thin metal plate, and a magnetic flux absorbing ring 20 integrated with the pulley clutch main body 10.
Is integrated by swaging the pulley clutch main body 10 at a predetermined position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulley clutch having a pulley clutch main body provided with a magnet accommodating space and a method for manufacturing the same.

[0002]

2. Description of the Related Art FIG. 5 is a cross-sectional explanatory view of a pulley clutch according to a conventional example. The pulley clutch body 2 of this pulley clutch 1 is formed from a round bar by cold forging.
Web portion 2a, bearing holding portion 2b, rim portion 2c
It consists of The bearing 3 is press-fitted into the bearing holding portion 2b, and a V groove, for example, a poly V groove 2d is formed by turning on the outer periphery of the rim portion 2c. A magnet housing space 2e is formed by the outer peripheral surface of the bearing holding portion 2b and the inner peripheral surface of the rim portion 2c. In FIG. 5, 2f is a lightening hole.

FIG. 6 is a cross-sectional explanatory view of a pulley clutch according to another conventional example. The pulley clutch main body 5 of the pulley clutch 4 is formed from a round bar by cold forging as in the case shown in FIG. It is composed of a web portion 5a, a bearing holding portion 5b, and a rim portion 5c, and a magnet accommodating space portion 5e is formed by the outer peripheral surface of the bearing holding portion 5b and the inner peripheral surface of the rim portion 5c. Poly V groove 5
The pulley portion 5f having d on its outer periphery is separately formed from a metal plate and integrally fixed to the pulley clutch body 5 by welding.

[0004]

However, since the former pulley clutch 1 requires a large-scale facility for cold forging, there is a problem that the manufacturing cost becomes high in the case of production in small quantities of various types. There is also a problem that the weight is heavy.

Further, in the latter pulley clutch 4, since the pulley portion 5f is formed of a metal plate, the pulley clutch 1 can be made slightly lighter than the former pulley clutch 1, but since a welding process is required, the manufacturing cost is reduced. As a result, the welding strength becomes insufficient and the mounting strength becomes insufficient, which may reduce the reliability of quality.

The present invention has been made to solve the above-mentioned problems of the prior art. The object of the present invention is to form a pulley clutch body from a thin metal plate by plastic working, and to house the magnet accommodating space in the pulley clutch body. It is an object of the present invention to provide a pulley clutch in which a magnetic flux absorbing ring forming a part is integrally fixed, and a manufacturing method thereof.

[0007]

In order to achieve the above object, a pulley clutch according to a first aspect of the present invention comprises:
A pulley clutch main body formed by plastically processing a thin metal plate, and a pulley clutch in which a magnetic flux absorption ring is integrated with this pulley clutch main body, and the magnetic flux absorption ring is caulked at a predetermined position of the pulley clutch main body. It is characterized by the fact that they are integrated.

Further, in the pulley clutch of claim 2,
It is characterized in that a caulking locking means is provided outside the contact surface side of the pulley clutch main body with the magnetic flux absorbing ring.

According to the pulley clutch of claim 3,
The caulking locking means is characterized in that it comprises a flange-shaped caulking projection that is provided outside the contact surface side of the magnetic flux absorbing ring and the pulley clutch main body.

According to the pulley clutch of claim 4,
The caulking protrusions that constitute the caulking locking means are characterized in that they are radially arranged at a predetermined distance outside the contact surface side between the magnetic flux absorbing ring and the pulley clutch main body.

According to the pulley clutch of claim 5,
It is characterized in that a caulking locking portion is provided at a corresponding position of the magnetic flux absorbing ring facing the caulking locking means.

In the method for manufacturing a pulley clutch according to a sixth aspect of the present invention, a step of forming a disc-shaped web portion and a ring-shaped rim portion concentrically arranged on the outer peripheral edge of the web portion from a metal thin plate, Forming a cylindrical bearing holding part in the center of the web part, forming a caulking locking means concentric with the bearing holding part outside the bearing holding part of the web part, and the caulking locking means After inserting the magnetic flux absorbing ring into the magnetic flux absorbing ring, the side surface of the magnetic flux absorbing ring is brought into contact with the side surface of the web portion, and then the side surface of the magnetic flux absorbing ring is caulked via the caulking locking means. A step of fixing the absorbing ring to the web portion,
And a step of inserting the bearing into the bearing holder.

[0013]

According to the pulley clutch and the method for manufacturing the same according to claims 1 and 6, since the pulley clutch body is formed by plastic working from a thin metal plate, it is possible to reduce the weight as compared with a conventional cold forged product. It is possible to reduce the manufacturing cost significantly.

Further, according to the pulley clutches of claims 2, 3 and 4, the magnetic flux absorbing ring can be easily fixed integrally to the pulley clutch main body by the caulking locking means.

According to the pulley clutch of the fifth aspect, the magnetic flux absorbing ring can be fixed to the pulley clutch main body more easily and more firmly by the caulking locking portion provided on the magnetic flux absorbing ring. .

[0016]

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

FIG. 1 is an explanatory front view of a pulley clutch,
2 is a sectional view taken along the line II-II of FIG. 1, FIG. 3 is a front view explanatory view of a pulley clutch main body showing a modified example of the caulking locking means, and FIG. 4 is an explanatory view showing a manufacturing process of the pulley clutch. .

In the figure, E is a pulley clutch, which has a pulley clutch main body 10 formed by subjecting a thin metal plate to plastic working, and a magnetic flux absorbing ring 20 integrated with the pulley clutch main body 10.

The pulley clutch E according to the present invention is characterized in that the magnetic flux absorbing ring 20 is integrated by caulking the pulley clutch main body 10 at a predetermined position.

Further, the structure of the pulley clutch E according to the present invention will be described in detail.

The pulley clutch body 10 is formed by plastic working from a thin metal plate, and has a disc-shaped web portion 11
And a ring-shaped rim portion 12 arranged concentrically with the web portion 11 on the outer peripheral edge side of the web portion 11 and having a V groove, for example, a poly V groove 12a on the outer periphery, and arranged concentrically in the center of the web portion 11. It comprises a cylindrical bearing holding portion 13 for holding the bearing 30. Further, the web portion 11 is formed with a lightening hole 11a for reducing the weight of the pulley clutch body 10.

Web portion 11 of pulley clutch body 10
On the outer side of the contact surface with the magnetic flux absorbing ring 20, a flange-shaped caulking projection 14 serving as caulking locking means is provided concentrically with the bearing holding portion 13 over the entire circumferential direction.

The magnetic flux absorbing ring 20 is concentrically arranged outside the bearing holding portion 13, and the web portion 11 is provided.
A locking projection 20a as a caulking locking portion is provided over the entire area in the circumferential direction at a position facing the caulking projection 14. Further, the anti-web portion 11 of the magnetic flux absorbing ring 20
The side end surface projects outward from the end surface of the rim portion 12 on the side opposite to the web portion 11 and is formed by the inner peripheral surface of the magnetic flux absorbing ring 20 and the outer peripheral surface of the bearing holding portion 21. A magnet (not shown) is housed.

Then, the magnetic flux absorbing ring 20 is inserted into the caulking protrusion 14 so as to abut the web portion 11, and the caulking protrusion 14 is caulked to the magnetic flux absorbing ring 20 side, whereby the magnetic flux absorbing ring 20. Is integrally fixed to the web portion 11 of the pulley clutch body 10.

In the above embodiment, the caulking projections 14 serving as the caulking locking means are provided over the entire area in the circumferential direction, but as shown in FIG. You may make it arrange | position 6 pieces.

Next, a method of manufacturing the pulley clutch E according to the present invention will be described.

The method of manufacturing the pulley clutch E is a step of forming a disc-shaped web portion 11 from a thin metal plate and a ring-shaped rim portion 12 concentrically arranged on the outer peripheral edge of the web portion 11, and the web. Forming a cylindrical bearing holding portion 13 in the center of the portion 11 and forming a caulking protrusion 14 as a caulking locking means concentric with the bearing holding portion 13 on the outside of the bearing holding portion 13 of the web portion 11. Insert the magnetic flux absorbing ring 20 into the process and the caulking protrusion 14,
After the side surface of the magnetic flux absorbing ring 20 is brought into contact with the side surface of the web portion 11, the side surface of the magnetic flux absorbing ring 20 is caulked via the caulking projection 14 to thereby attach the magnetic flux absorbing ring 20 to the web portion 11. It includes a step of fixing and a step of inserting the bearing 30 into the bearing holding portion 13 and caulking it.

Further, details of the method for manufacturing the pulley clutch E according to the present invention will be described with reference to FIG.

First, as shown in FIG. 4 (a), a disk-shaped work 40 is formed by pressing from a thin metal plate, and then,
As shown in FIG. 4B, the work 40 is drawn to form the cup body 41.

Next, as shown in FIG. 4C, a bottomed cylindrical portion 42 is formed in the center of the cup body 41 by drawing, and then, as shown in FIG. 4D, a forming step is performed. The web portion 11, the rim portion 12, and the bearing holding portion 13 are first preformed. At this time, the thickness of the web portion 11 is thicker than that of the other portions.

Next, as shown in FIG. 4 (e), a web portion 11 and a rim portion 12 are formed by a forming process.
The bearing holder 13 is secondarily preformed. At this time, a flange-shaped caulking projection 14 as caulking locking means is provided outside the contact surface of the web portion 11 with the magnetic flux absorbing ring 20 concentrically with the bearing holding portion 13 over the entire circumferential direction.

Next, as shown in FIG. 4 (f), a through hole 13a is formed in the bottom portion of the bearing holding portion 13, and further, as shown in FIG. 4 (g), the outer peripheral surface of the rim portion 12 is roll-formed. After the poly V groove 12a is formed by, the lightening hole 11a is formed in the web portion 11 as shown in FIG. 4 (h).

Next, as shown in FIG. 4 (i), the magnetic flux absorbing ring 20 is inserted into the caulking projection 14 so as to abut the web portion 11, and then, as shown in FIG. 4 (j).
By crimping the crimping protrusion 14 toward the magnetic flux absorbing ring 20 with the crimping punch 43, the magnetic flux absorbing ring 2
0 is integrally fixed to the web portion 11, that is, to the pulley clutch main body 10.

Then, as shown in FIG. 4 (k), the outer surface 11b of the web portion 11 and the inner peripheral surface 13b of the bearing holding portion 13 are machined, and thereafter, as shown in FIG. 4 (l). The bearing 30 is press-fitted into the bearing holding portion 13 so as to abut on the bottom portion of the bearing holding portion 13, and a plurality of inner circumferential surfaces of the bearing holding portion 13 on the web portion 11 side are provided.
For example, the bearing 30 is integrally fixed to the bearing holding portion 13 by caulking at 12 places on the bearing 30 side. This completes the pulley clutch E.

As described above, according to the pulley clutch E and the method for manufacturing the same according to the present invention, the pulley clutch body 10 is formed by plastic working from a thin metal plate, so that it is lighter than the conventional cold forged product. It is possible to reduce the manufacturing cost significantly. In addition, since the web portion 11, the rim portion 12, and the bearing holding portion 13 that require strength are integrally formed from a thin metal plate, and the web portion 11 that transmits power is thickened, the strength of the pulley clutch 10 is increased. It can strongly improve durability and reliability of quality.

Further, the magnetic flux absorbing ring 20 can be easily and integrally fixed to the pulley clutch main body 10 by the caulking protrusion 14 as the caulking locking means.
The magnetic flux absorbing ring 20 can be more easily and more firmly fixed to the pulley clutch main body 10 by the locking protrusion 20a provided as the caulking locking portion on the magnetic flux absorbing ring 20.

[0037]

As described above, claim 1 according to the present invention
According to the pulley clutch and the manufacturing method thereof,
Since the pulley clutch main body is formed from a thin metal plate by plastic working, it is possible to reduce the weight as compared with the conventional cold forged product, and to significantly reduce the manufacturing cost.

According to the pulley clutches of the second, third and fourth aspects, the magnetic flux absorbing ring can be easily fixed integrally to the pulley clutch body by the caulking locking means.

Further, according to the pulley clutch of the fifth aspect, the magnetic flux absorbing ring can be fixed to the pulley clutch main body more easily and firmly by the caulking locking portion provided on the magnetic flux absorbing ring. it can.

[Brief description of drawings]

FIG. 1 is a front view explanatory diagram of a pulley clutch according to the present invention.

2 is a cross-sectional view taken along the line II-II of FIG.

FIG. 3 is an explanatory front view of a pulley clutch body showing a modified example of the caulking locking means according to the present invention.

FIG. 4 is an explanatory view showing a manufacturing process of the pulley clutch according to the present invention.

FIG. 5 is a cross-sectional explanatory view of a pulley clutch according to a conventional example.

FIG. 6 is a cross-sectional explanatory view of a pulley clutch according to another conventional example.

[Explanation of symbols]

 E Pulley clutch 10 Pulley clutch main body 11 Web part 12 Rim part 13 Bearing holding part 14 Caulking locking means (caulking protrusion) 20 Magnetic flux absorbing ring 20a Caulking locking part (locking protrusion) 30 Bearing

Claims (6)

[Claims] 1. A pulley clutch main body formed by plastically processing a thin metal plate, and a pulley clutch in which a magnetic flux absorbing ring is integrated with the pulley clutch main body, wherein the magnetic flux absorbing ring is a predetermined part of the pulley clutch main body. A pulley clutch characterized by being integrated by swaging at the position. 2. The pulley clutch according to claim 1, wherein caulking locking means is provided on the outside of the contact surface side of the pulley clutch main body with the magnetic flux absorbing ring. 3. The caulking locking means comprises a flange-shaped caulking protrusion projecting outward on the contact surface side between the magnetic flux absorbing ring and the pulley clutch main body. 2. The pulley clutch described in 2. 4. The caulking protrusion forming the caulking locking means is arranged radially outside the contact surface side of the magnetic flux absorbing ring and the pulley clutch main body at a predetermined interval. The pulley clutch according to claim 1, claim 2 or claim 3. 5. The pulley according to claim 1, wherein a caulking locking portion is provided at a corresponding position of the magnetic flux absorbing ring facing the caulking locking means. clutch. 6. A step of forming a disc-shaped web portion and a ring-shaped rim portion arranged concentrically on the outer peripheral edge of the web portion from a thin metal plate, and a cylindrical bearing holding member in the center of the web portion. A step of forming a portion, a step of forming a caulking locking means concentric with the bearing holding portion on the outside of the bearing holding portion of the web portion, and a magnetic flux absorbing ring inserted into the caulking locking means, A step of fixing the magnetic flux absorbing ring to the web portion by contacting the side surface of the absorbing ring with the side surface of the web portion and then caulking the side surface of the magnetic flux absorbing ring via the caulking locking means. And a step of inserting the bearing into the bearing holding portion and crimping the bearing, the method of manufacturing the pulley clutch.