KR101928649B1 - Ring assembly for clutch and method for manufacturing the same - Google Patents

Abstract

A ring assembly of a clutch used in an automotive compressor and a method of manufacturing the ring assembly are disclosed. A method of manufacturing a ring assembly of a clutch includes the steps of removing the surface oil of the inner ring and the outering, surface treating the inner ring and the outering, applying an adhesive to one surface of the inner ring and one surface of the outer ring, A step of injecting an elastic material in a liquid state or a gel state between the outer ring and the outer ring, applying heat to the elastic material to form the elastic material, and reducing the outer diameter of the outer ring surrounding the inner ring and surrounding the inner ring .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a ring assembly for a clutch,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ring assembly for a clutch and a method of manufacturing the ring assembly, and more particularly to a ring assembly for a clutch used in a vehicle compressor and a manufacturing method thereof.

Generally, a compressor used in an automotive air conditioner is connected to an evaporator and a condenser, and is driven by engine power to compress the refrigerant and send it to a condenser. Further, the compressor is usually selectively delivered with the engine power by the intermittent operation of the electromagnetic clutch.

The above-described compressor basically includes a pulley that rotates by a rotational force transmitted from an engine, a limiter that functions as a power transmitting device, an impact sensor that outputs a limiter, an impact of an overtorque transmitted from the drive shaft of the compressor while being connected to the pulley, And a damper for absorbing the fluid.

BACKGROUND ART [0002] In recent years, a variable capacity type compressor capable of adjusting a required power according to a cooling state has been widely used. However, when a load greater than a reference value, that is, an overload larger than the maximum setting load is applied, a phenomenon occurs in which the central shaft is not rotated in the variable displacement compressor and the rotating pulley is stopped together with the driving force of the engine. When such a problem occurs, the belt connected to the pulley continuously slips on the pulley irrespective of the drive of the engine, thereby causing belt wear and eventually causing the belt to break. In order to prevent such a problem from occurring, most compressors are equipped with a power transmission device capable of shutting off the power transmission when an overload occurs.

Thus, as the performance of the compressor is improved or the functions thereof are diversified, the structure of the compressor becomes complicated and the weight of the compressor increases accordingly. Increasing the weight of the compressor has the disadvantage of lowering the automobile fuel economy and increasing the manufacturing cost by increasing the process steps.

Korean Registered Patent No. 10-1463256 (November 12, 2014)

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems in the prior art, and to provide a method of manufacturing a ring assembly of a clutch, which can manufacture a ring assembly of a clutch used in a compressor of a vehicular air- .

It is another object of the present invention to provide a ring assembly of a clutch produced by the above-described manufacturing method.

According to an aspect of the present invention, there is provided a method of manufacturing a ring assembly of a clutch, the method comprising: removing surface oil of an inner ring and an outer ring; Surface treating the inner ring and the outer ring; Applying an adhesive to one surface of the inner ring and one surface of the outer ring; Injecting an elastic material in a liquid or gel state between the inner ring and the outer ring; Applying heat to the elastic material to form the elastic material; And a step of reducing the outer diameter of the outer ring surrounding the inner ring by placing the elastic body in which the elastic material is molded.

In one embodiment, the reducing step may be performed within a predetermined time after the molding step, that is, before the elastic material is completely hardened after the elastic material is molded. After the reducing step, a part of the elastic body may be provided with a concave portion (secondary forming portion) in a form of secondary molding. The secondary shaping portion may correspond to a portion pressed by the supporting portion or the supporting device for fixing the ring assembly in the process of reducing the outer diameter of the outer ring.

In one embodiment, the method of manufacturing a ring assembly of a clutch may further include, after the shrinking step, forming a fastening hole in the outer edge fastener of the outer ring.

In one embodiment, the method of manufacturing the ring assembly of the clutch may further include, after the step of forming the fastening hole, painting the inner ring, the outer ring, and the elastic body therebetween.

In one embodiment, the outering comprises a circular disc shaped body having a through opening; A first flange extending in a direction orthogonal to one surface of the body at an inner edge facing the opening; And a fastening portion protruding radially from an outer edge of the circular disc-shaped body and having a through-hole.

In one embodiment, the material of the outering may be aluminum or plastic.

In one embodiment, the material of the outerings may be PBT reinforced with polybutylene terephthalate (PBT) or 30% glass fiber.

In one embodiment, the inner ring includes: a circular disc shaped body having a through opening smaller than the through opening of the outering and smaller than the size of the outering; And a second flange extending from the outer edge of the body in a direction orthogonal to one surface of the body.

In one embodiment, the thickness of the material plate of the inner ring may be greater than the thickness of the material plate of the outer ring.

In one embodiment, the elastic material may comprise rubber.

According to another aspect of the present invention, there is provided a ring assembly for a clutch including an outer ring, an inner ring, and an elastic body therebetween. The outering comprising: a circular disk shaped body having a through opening; A first flange extending in a direction orthogonal to one surface of the body at an inner edge facing the opening; And a fastening portion protruding radially from an outer edge of the circular disk shaped body and having a through-hole, wherein the inner ring has a through-hole smaller than the through-hole of the outer ring, A smaller circular disk shaped body; And a second flange extending in a direction orthogonal to one side of the body at an outer edge of the body, the elastic body being disposed between the first flange and the second flange, A flange and a concave portion that is fixedly adhered to the second flange and is secondarily formed in a process of reducing an outer diameter of the outer ring.

In the case of using the ring assembly and the manufacturing method of the clutch according to the present invention as described above, the inner ring and the outer ring are efficiently manufactured by using an aluminum material in the compressor of the vehicle compressor or the compressor and omitting the painting process, The ring assembly or the ring assembly can reduce the manufacturing cost while reducing the weight of the electromagnetic clutch or the compressor including the compressor.

According to an embodiment of the present invention, a specific plastic material such as polybutylene terephthalate (PBT) or PBT reinforced with 30% of glass fiber is used, Thereby reducing manufacturing costs while reducing the weight of the electromagnetic clutch or compressor including the ring assembly or the ring assembly.

1 is an illustration of a compressor using a clutch with a ring assembly according to an embodiment of the invention.
Figure 2 is an illustration of a ring assembly of a clutch that may be employed in the compressor of Figure 1;
3 is another exemplary view of a ring assembly of a clutch that can be employed in the compressor of FIG.
Fig. 4 is an exemplary view corresponding to the bottom view of the ring assembly of Fig. 3;
5 is a plan view of a ring assembly according to an embodiment of the present invention.
Figure 6 is a perspective view of the outering of the ring assembly of Figure 5;
7 is a plan view, front view and sectional view taken along the line A1-A1 of the outering of Fig. 6;
8 is a bottom view of the outering of Fig.
Fig. 9 is a plan view, a front view, a cross-sectional view and a bottom view of the inner ring of the ring assembly of Fig. 5 taken along line A2-A2.
10 is a flowchart of a method of manufacturing a ring assembly of a clutch according to another embodiment of the present invention.
11 is a photograph showing an assembly in which a hub is coupled to a ring assembly according to another embodiment of the present invention.
12 is a photograph showing a clutch in which a hub and a disk are coupled to a ring assembly according to another embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "comprising" and "having" are intended to specify the presence of stated features, integers, steps, operations, elements, parts, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless otherwise defined herein, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted in a manner consistent with the contextual meaning of the related art, and are not to be construed as ideal or overly formal, unless explicitly defined herein.

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

1 is an illustration of a compressor using a clutch with a ring assembly according to an embodiment of the invention.

Referring to FIG. 1, the compressor 100 according to the present embodiment can be used as a part of a vehicle air conditioner. The compressor 100 includes a pulley 10 that receives a driving force supplied from an engine, a pulley 10 that rotates together with the pulley 10 and is broken or loose when a torque greater than a set value is applied to the compressor 100, And a clutch (20) for blocking or isolating the transmission of rotation to the rotating shaft of the motor (100). The assembly of the pulley 10 and the clutch 20 may be referred to as a power transmission device.

The clutch 20 includes a ring assembly 30, a hub, and a disk (see FIG. 11). The assembly of the ring assembly 30 and the disc may be referred to simply as a disc in a broad sense. The assembly of the wider disc and hub may be referred to as an electromagnetic clutch. In the present specification, the clutch may correspond to the electromagnetic clutch, but is not limited thereto.

The ring assembly 30 may include an outering ring, an inner ring, and an elastic body disposed therebetween. Also, depending on the implementation, the ring assembly 30 may include outering, inner ring, resilient body, and hub.

Figure 2 is an illustration of a ring assembly of a clutch that may be employed in the compressor of Figure 1;

2, the ring assembly 30 according to the present embodiment may include an outer ring 320, an inner ring 340, a first elastic body, and a second elastic body 370.

The ring assembly 30 may include an outer ring 320 and an inner ring 340. The elastic body is composed of an elastic body (first elastic body) formed by injecting an elastic material in the form of liquid or gel between the outer ring 320 and the inner ring 340, and an elastic body (a second elastic body 370 ), But it is not limited thereto, and it can be formed of a single elastic body.

2, the outering 320 and the inner ring 340 are formed so that the fastening holes (see 325 in FIG. 3) of the outer ring 320 and the fastening holes (see 345 in FIG. 3) It may be in a state where it is not. In addition, the outer ring 320 and the inner ring 340 may be in a state that they are not yet painted by a predetermined paint.

3 is another exemplary view of a ring assembly of a clutch that can be employed in the compressor of FIG. Fig. 4 is an exemplary view corresponding to the bottom view of the ring assembly of Fig. 3;

3 and 4, the ring assembly 30 according to the present embodiment may include an outer ring 320, an inner ring 340, and a first elastic body 360.

The outer ring 320 has a fastening hole 325 formed in the fastening piece and the inner ring 340 may have a fastening hole 345 formed in the body. The body of the inner ring 340 may further include another hole 344. The other holes 344 may be used for air circulation or for engagement with fastening means or protrusions (protrusions).

The ring assembly 30 is pressed together with the outering ring 320 when the outer ring 320 is pressed to reduce the outer diameter of the outer ring 320 after the first elastic body 360 is formed, And secondary forming portions 363 and 364 of the first elastic body 360 (see Fig. 4).

The above-described secondary molding sections 363 and 364 are formed so that after the elastic material is injected between the outer ring and the inner ring, before the elastic material is completely molded, that is, in the molding step, Can be formed when performing the process. The secondary forming portions 363 and 364 may correspond to the portions pressed by the supporting portion or the supporting device for fixing the ring assembly in the process of reducing the outer diameter of the outering.

5 is a plan view of a ring assembly according to an embodiment of the present invention.

5, the ring assembly 30 according to the present embodiment may include an outer ring 320, an inner ring 340, and a first elastic body 360. Hereinafter, the first elastic body is simply referred to as an elastic body.

The outer ring 320 has a circular disk-shaped body 321 having a through-hole and a flange (first flange) 323 extending in a direction orthogonal to one surface of the body 321 at an inner edge contacting the through- A fastening piece 324 protruding in a radial direction on a plane parallel to one surface of the body 321 from the center point of the body 321 at the outer edge of the circular disk shaped body 321, And a through-hole 325 formed therein. The fastening holes 325 are used to connect the outer part 320 with other parts using bolts, rivets, or the like, and can be appropriately deformed by corresponding recesses, concavo-convex parts, or the like. The combination of the fastening piece 324 and the fastening hole 325 can be referred to as a fastening portion.

The inner ring 340 is arranged in the through-hole of the outer ring 320. The inner ring 340 has a circular disk-shaped body 341 having a through-hole smaller than the through-hole of the outer ring 320 and having a size smaller than that of the outer ring 320, A flange 343 extending in a direction orthogonal to one surface of the body 341 at the outer edge of the body 341 and a flange 343 having a diameter equal to or different from the diameter of the fastening hole 325 of the outer ring 320 And a through-hole 344 having a through-hole (not shown).

The elastic body 360 is disposed between the first flange 323 of the outer ring 320 and the second flange 343 of the inner ring 340. To this end, the elastic body 360 may have a ring-shaped body 361 having a central opening. In addition, the elastic body 360 may be fixedly attached to the first flange 323 by placing an adhesive or an adhesive material between the elastic body 360 and the first flange 323. Similarly, the elastic body 360 may be fixedly attached to the second flange 343 with at least a portion of adhesive or adhesive material between the elastic body 360 and the second flange 343.

Hereinafter, the structure of the outer ring and the inner ring will be described in more detail.

Figure 6 is a perspective view of the outering of the ring assembly of Figure 5; Fig. 7 is a plan view (a), a front view (b), and a sectional view (c) taken along the line A1-A1 for outering in Fig. And Figure 8 is a bottom view of the outering of Figure 6.

6 to 8, the outer ring 320 of the ring assembly according to the present embodiment is a component for connecting a ring-shaped assembly to a screw-coupled disk coupled to a pulley. The outering 320 includes a body 321, a flange 323, and a fastening piece 324.

The material of the outer ring 320 may be aluminum or plastic. In the case of plastic, it may be polybutylene terephthalate (PBT), more preferably PBT reinforced with 30% of glass fiber.

In the outering 320, the body 321 has a circular disk shape, and has an opening (through-hole) 322 passing through one side and the other side in the central portion thereof. The diameter of the opening 322 may be from about 50 mm to about 250 mm.

The flange 323 extends in a direction orthogonal to one surface of the body 321 at an inner edge thereof in contact with the opening 322 of the body 321. The flange 323 is formed to extend the thickness or the depth of the through-hole 322. The flange 323 may have an extension length of about 10 mm to about 20 mm. The thickness of body 321 and / or flange 323 may be about 1.6 mm to about 2.0 mm.

The fastening piece 324 may be integrally formed with the body 321. The fastening pieces 324 may have a shape protruding from the outer edge of three bodies 321 of the radial directions from the center of the circular disk shape toward the outside with a predetermined width. A fastening hole 325 may be formed in the fastening piece 324. The fastening holes 325 may be formed after the elastomer is placed and integrated with the inner ring during the manufacturing process of the ring assembly. The fastening holes 325 can be used to fasten the disk to the disk by means of rivets or the like.

Figure 9 is a view of the inner ring of the ring assembly of Figure 5; FIG. 9A is a plan view of the inner ring of FIG. 5, FIG. 9B is a front view, and FIG. 9C is a sectional view taken along the line A2-A2. 9 (d) is a bottom view of the inner ring of Fig. 5. Fig.

Referring to FIG. 9, the inner ring 340 of the ring assembly according to the present embodiment is a component for connecting the drive shaft of the compressor to the ring assembly. The inner ring 340 has a body 341 and a flange 343.

The material of the inner ring 340 may be aluminum or plastic. In the case of plastic, it may be polybutylene terephthalate (PBT), more preferably PBT reinforced with 30% of glass fiber.

In the inner ring 340, the body 341 has a cylindrical disc shape smaller than the through-hole of the outering, and has a through-hole 342 at the center thereof. After being assembled with the ring assembly, a fastening hole may be formed in the body 341. The fastening hole may be fastened by fastening means with a hub to which the drive shaft of the compressor is coupled.

The flange 343 may be an extension extending in a direction orthogonal to one surface of the body 341 at the outer edge of the body 341. A circular depression with a predetermined depth may be formed on one surface of the body 341 by the flange 343. [

10 is a flowchart of a method of manufacturing a ring assembly of a clutch according to another embodiment of the present invention.

Referring to FIG. 10, a method of manufacturing a ring assembly according to the present embodiment may include first to eighth steps (S11 to S18), and may include a cleaning device, a shot device, a coating device, a molding device, sizing device, a piercing device, and a coating device, such as a conveyor belt, to perform a series of automatic processes. Each process apparatus is included in the ring assembly manufacturing apparatus, and can correspond to a configuration unit (a cleaning unit, a shot unit, or the like) that performs the functions of each process.

Each step will be described in detail. First, the first step (S11) may be carried out after performing the surface inspection according to the inspection standard according to the material receipt as the surface oil removing step or the cleaning step with the cleaning device. In the first step S11, the surface oil of the inner ring and the outer ring is removed. The surface oil removal process of the inner ring and the outer ring may include a cleaning time of about 30 minutes. According to the first step S11, when the material of the inner ring and the outer ring is aluminum, the amount of oil remaining on the inner ring and the outer ring in a short time can be reduced. Further, when the material of the inner ring and the outer ring is plastic, substantially no residual oil can be provided. In addition, if inner ring and outer ring made of plastic are used, the washing process can be omitted according to the condition of the plastic material.

The second step (S12) is a surface treatment step by a shot apparatus, in which the surface of the inner ring and the surface of the outering, in particular, the second flange of the inner ring, And performing a surface treatment on mutually facing surfaces of the first flange of the outering. The surface treatment may be a surface treatment with an abrasive such as a shot. When performing a surface treatment using a shot for inner ring and outer ring made of aluminum or plastic, the material can reduce the short time by the characteristic (softness). Short surface treatment for inner ring and outerering can be performed for about 20 minutes. In addition, when a plastic material is used, surface treatment such as etching can be performed in the inner ring or outerring itself. According to the second step S12, the bonding strength or the bonding strength between the aluminum material and the rubber can be greatly increased.

The third step (S13) may comprise applying an adhesive on one side of the first flange of the outering and the second flange of the inner ring facing each other, as an adhesive applying step with the application device. In the third step S13, the outer ring to which the adhesive is applied through the hot air device coupled to the applicator is heated to about 90 DEG C at about 60 DEG C, or the inner ring coated with the adhesive is heated to about 60 DEG C Followed by drying at 90 占 폚. According to the adhesive applying step, the bonding force between the outer ring of the aluminum or plastic material and the inner ring and the elastic material can be enhanced.

The fourth step S14 is a step of injecting the elastic material by the molding apparatus. The elastic material is melted in a state of liquid, semi-solid lump or gel by applying heat to the raw material, Lt; / RTI > The raw paper may include rubber raw paper.

The fifth step S15 may include converting the elastic material injected between the outer ring and the inner ring into an elastic body through a vulcanization process in a molding apparatus. When outer ring and inner ring made of aluminum or plastic are used, the vulcanization time can be shortened due to the high thermal conductivity of the material itself. The vulcanization time in the vulcanization step of this embodiment may be from about 360 seconds to about 480 seconds. The fifth step S15 may be performed substantially simultaneously with the fourth step S14.

The sixth step S16 may include reducing the outer diameter of the outering by a sizing device. The sizing device may be disposed between the outer ring and the inner ring to reduce the outer diameter of the first flange or body of the outer ring while supporting the formed elastic body and the inner ring in the previous step S15. The outer diameter reduction process of the outering can improve the durability of the ring assembly.

In addition, the sixth step S16 may be performed before the molded elastic body is completely formed in the previous step S15. In this case, after the sizing step of the sixth step S16, the elastic body may be formed with a depressed depression (secondary molding portion) by a supporting means such as a support fixture.

The ring assembly manufactured through the first through sixth steps S11 through S16 may be manufactured, transported, distributed or sold in the semi-finished product form.

The seventh step S17 may include forming a fastening hole simultaneously or sequentially on the outering and inner ring by a piercing device. The fastening hole of the outer ring is formed in a fastening piece extending from the body to the outside, and the fastening hole of the inner ring can be formed in a body portion surrounded by the second flange. The diameter of the fastening hole of the inner ring may be greater than or equal to the diameter of the fastening hole of the outer ring. When the coupling hole (or coupling hole) of the ring assembly provided in the clutch and the coupling means penetrating the coupling hole are used, the rotation axis of the pulley and the compressor can be effectively connected. The pulley can be connected to an external power unit (engine, etc.) through a belt, chain, or the like. The fastening means may include bolts, rivets, and the like. The rotary shaft of the compressor can effectively fasten the ring assembly used for the clutch.

The eighth step S18 includes coating the outer surface of the ring assembly having the outer ring, the elastic body and the inner ring and the fastening hole through the piercing process with a predetermined paint, as a painting step by a painting apparatus . The coating material may comprise a material capable of enhancing resistance to salt water. In this embodiment, since aluminum or plastic is used as the material of the inner ring and the outer ring, the coating process can be at least partially omitted. In fact, the inner ring or outer ring made of plastic material does not cause corrosion or rust, so the painting process can be omitted completely, and the inner ring or outer ring made of aluminum material is resistant to salt water, so the coating process can be omitted almost completely. However, when the coating process is performed, it has an advantage that it can improve not only the resistance to salt water but also a good appearance. The coating time may vary depending on the coating material. For example, the painting time can correspond to the time for the painting that satisfies the salt water time of 480 hours.

According to the present embodiment, by using the outer ring and the inner ring made of aluminum or plastic, it is possible to reduce or eliminate the cleaning time in manufacturing the ring assembly, reduce the short time, . In addition, the coating step can be omitted. In addition, the weight of the device can be reduced.

Further, according to the above-described characteristics, the weight of the product of the ring assembly manufactured according to the above manufacturing method can be reduced to improve the fuel efficiency of the vehicle, and the effect of reducing the cost by shortening / reducing the manufacturing process of the ring assembly have. In addition, even when the ring assembly to be manufactured is manufactured by omitting the painting process, the ring assembly can be prevented from being resistant to salt water or rusting due to the characteristics of the material itself.

11 is a photograph showing an assembly in which a hub is coupled to a ring assembly according to another embodiment of the present invention.

11, the ring assembly according to the present embodiment includes an outer ring 320, an inner ring 340, and an elastic body 370, and includes a hub 40 for coupling with a rotary shaft (or a drive shaft) Lt; / RTI > The elastic body 370 may be provided with a secondary molded portion 364 having a concave shape.

The hub 40 may be integrally coupled to the fastening hole formed in the body of the inner ring 340 by fastening means such as a rivet 410.

Further, the hub 40 may include a support plate 401, a flange 403, and a fastening hole 405. The support plate 401 has a size in contact with the inside of one surface area of the body of the inner ring 340 and can be in close contact with one surface of the body of the inner ring 340. The fastening hole 405 formed in the support plate 401 may be engaged with the fastening hole of the inner ring 340 to fix the support plate 401 on the body of the inner ring 304.

The flange 403 has a cylindrical shape extending in a direction substantially perpendicular to one surface of the body of the inner ring 340 and a spline 407 for spline coupling with the drive shaft of the compressor may be formed therein. The flange 403 may be arranged in a substantially concentric structure with the center of the outer peripheral surface of the cross section orthogonal to the extending direction thereof with the through-hole of the inner ring 340. [

12 is a photograph showing a clutch in which a hub and a disk are coupled to a ring assembly according to another embodiment of the present invention.

Referring to FIG. 12, the clutch according to the present embodiment may include a ring assembly 30, a hub 40, and a disk 50.

A hub 40 is coupled to the inner ring of the ring assembly 30, and a disk 50 is coupled to the outer ring. The disc 50 may be referred to as an armature.

The disk 50 may have an outer ring disk 501, an inner ring disk 502, an opening 503, and a breaking bridge 504. [ The outer ring disk 501 has a fastening hole 505 disposed at a position facing the fastening hole of the outer ring of the ring assembly 30. The fastening holes can be filled with fastening means such as rivets. The inner ring disk 502 is disposed inside the outer ring disk 501 in a concentric arrangement with the center of the outer ring disk 501. An opening 503 is formed between the outer ring disk 501 and the inner ring disk 502 to separate them from each other by a predetermined distance. A break bridge 504 is provided between the outer ring disk 501 and the inner ring disk 502 to connect the outer ring disk 501 and the inner ring disk 502 in such a manner as to cut off the opening 503 .

On the inner opening surface of the inner ring disk 502, a thread for coupling with the pulley can be formed.

The breaking bridge 504 is broken when a torque greater than a set value is applied to a compressor that is coupled to a pulley (see 10 in FIG. 1) and rotates together to prevent the driving force of an external power device such as an engine from being transmitted to the rotary shaft of the compressor, Can be protected. In this embodiment, the break bridge 504 includes a one-step break bridge 504 disposed between the fastening holes of the outer ring disc 501, a two-step break bridge 504 formed next to the fastening hole of the outer ring disc 501, . The width of the two-step broken bridge in the extending direction of the circular opening 503 may be larger than the width of the one-step broken bridge 504. [

Although the present invention has been described with respect to a ring assembly of a clutch used in a vehicle compressor and a manufacturing method thereof, the present invention is not limited to such a structure, As a ring assembly of the clutch of the power transmission apparatus.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

Claims (12)

A method of manufacturing a ring assembly of a clutch used in a compressor,
Removing the surface oil of the inner ring and the outer ring;
Surface treating the inner ring and the outer ring;
Applying an adhesive to one surface of the inner ring and one surface of the outer ring;
Injecting an elastic material in a liquid or gel state between the inner ring and the outer ring;
Applying heat to the elastic material to form the elastic material; And
A step of performing a sizing process of reducing the outer diameter of the outer ring surrounding the inner ring before the elastic material is completely formed in the elastic material forming step, And pressing the elastic body with a support means for fixing the ring assembly together to form a secondary molded portion that is pressed concavely in the elastic body. The method according to claim 1,
Further comprising the step of forming a fastening hole in the outer edge fastening piece of the outer ring after the step of forming the secondary forming part in the elastic body. The method of claim 2,
Further comprising coating the inner ring, the outer ring, and the elastic body therebetween after forming the fastening hole. 4. The method according to any one of claims 1 to 3,
The out-
A circular disc shaped body having a through opening;
A first flange extending in a direction orthogonal to one surface of the body at an inner edge facing the opening; And
And a fastening portion projecting radially from an outer edge of the circular disk shaped body and having a through-hole. The method of claim 4,
Wherein the material of the outering ring is aluminum or plastic. The method of claim 4,
Wherein the material of the outering is PBT reinforced with polybutylene terephthalate (PBT) or 30% of glass fiber. The method of claim 4,
In the inner ring,
A circular disc shaped body having a through opening smaller than the through opening of the outering and smaller than the size of the outering; And
And a second flange extending from an outer edge of the body in a direction orthogonal to one surface of the body. The method of claim 7,
Wherein the inner ring is made of aluminum or plastic. The method of claim 8,
Wherein the thickness of the material plate of the inner ring is thicker than the thickness of the material plate of the outer ring. The method of claim 8,
Wherein the elastic material comprises rubber. delete delete

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