JPH0637901B2 - Carrier for clutch release bearing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a carrier of a clutch release bearing device mainly used in a clutch release mechanism of an automobile or the like.

<Prior Art> A clutch release bearing device is a clutch release mechanism of an automobile or the like, which transmits a stepping force from a pedal to a diaphragm spring of a clutch plate to disengage the clutch, that is, to perform a release operation. As the structure, for example, the structure described in JP-B-55-17853 is known.

FIG. 11 shows a schematic structure of the one described in the above publication, in which 1 is a steering element or carrier and 2 is a driving element or bearing. The carrier 1 is held by the flange-shaped hub portion 3 and the guide retainer 4 which are required to have a function of receiving an operating force for operating the clutch from a fork member (not shown), and smoothly slides in the axial direction. It consists of the required sleeve member 5. In addition, the bearing 2 includes a wave spring 7 between the cover case 6 fixed to the hub portion 3 and the hub portion 3.
The fixed wheel 2a is held by means of the carrier, and in response to the movement of the carrier 1, the tip of the movable wheel 2b is brought into contact with the diaphragm spring 8 to disengage the clutch.

As described above, since the hub portion 3 receives the operating force from the fork member, the hub portion 3 is required to have high strength and little deformation, and the contact portion 3a, which is generally made of heat-treated metal, is provided at the portion directly contacting the fork member. , 3b are integrally provided,
It has high wear resistance as well as mechanical strength. Further, it is desirable that the hub portion 3 itself is also made of a material having high strength.
It is desirable that the contact portion of the fixed ring 2a with the fixed wheel 2a is made of a material having a large friction coefficient as a measure for preventing creep.

Further, the sleeve portion 5 is rich in slidability, less likely to wear the guide retainer 4 (generally aluminum is used), has a small wear coefficient, is excellent in wear resistance, and has good dimensional accuracy. It is desirable that the coefficient of thermal expansion be the same as that of the guide retainer 4.

As described above, the carrier 1 is required to have different performance depending on its portion, but as shown in the figure, the hub portion 3 and the sleeve portion 5 are integrally formed of the same material,
Only one requirement can be met. Generally, since it is unavoidable to emphasize the problem of strength, it is usual to form the whole by molding a synthetic resin containing glass fiber. In this case, the inner surface of the sleeve portion 5 is made of glass fiber. Is exposed, and the guide retainer 4 is abraded or galled to deteriorate the clutch operability.

Further, the following problems may occur in terms of manufacturing technology called synthetic resin molding.

That is, as described above, the sleeve portion 5 is required to be finished with an extremely accurate inner diameter, but as shown in the figure, the hub portion 3 is integrally formed, and a part of the contact member 3 is formed.
Since it is an anisotropic shape in which a and 3b are provided, it is extremely difficult to obtain a high inner diameter accuracy, and a lot of trial examinations regarding the shape of the member, molding conditions, etc. are required. In addition, it is desirable that both edges of the inner surface of the sleeve portion 5 be rounded as a measure against abrasion during sliding, but the inner diameter molding die must be removed in one direction because of the structure of the injection molding die. Although the edges can be rounded, it is difficult to round both.

<Purpose of the Invention> The present invention solves the above problems and is suitable for a flange portion that is mainly required to have strength and a sleeve portion that is mainly required to have good slidability. The purpose is to provide a carrier that can be formed of a material.

<Structure of the Invention> In order to achieve the above object, in the carrier of the clutch release bearing device of the present invention, the sleeve member into which the guide retainer is inserted is made of a resin molded product having high wear resistance and good slidability. A flange having a low height is projected on the outer periphery of the sleeve member close to one end edge, and a rotation preventing uneven portion is formed on the side surface of the flange on the other end edge side of the sleeve on the inner diameter side with respect to the outer peripheral edge of the flange. The flange-shaped hub member, which is formed and is in contact with the fork member for operating the clutch, is made of metal having high mechanical strength, and has a diameter near the inner edge of the hub member and the outer peripheral edge of the flange of the sleeve member. Form an appropriate number of communication holes in the axially outer part,
The hub member is fitted into the sleeve member from the side where the flange is provided and brought into contact with the flange, and is continuous through the communication hole by integral molding of resin having high mechanical strength, and with the hub member. It is characterized in that the sleeve member and the hub member are integrally connected by forming a connecting portion having a shape sandwiching the flange.

<Operation of the Invention> According to the carrier of the clutch release bearing device of the present invention, since the sleeve member prevents wear due to the guide retainer inserted in the inner periphery and improves slidability,
In addition to using a resin having high abrasion resistance and slidability, the hub member has abrasion resistance and durability against repeated pressing force from the fork member for clutch operation, and has high mechanical strength. It is made of metal and separately made of a suitable material. Thereafter, the connecting portion is connected through the axial connecting hole formed in the hub member to connect the sleeve member and the hub member to each other to obtain the durable strength of the integral structure, and the flange of the sleeve member and the hub member are connected. It is integrally molded with resin with high mechanical strength. A resin having a high fluidity is selected as the resin of the connecting portion so as to fill the communication hole at the time of molding. Since the connecting portion is formed separately from the sleeve member, it is possible to select an optimum resin having fluidity and high mechanical strength for filling the communication hole during molding.

Then, the coupling portion made of resin having high mechanical strength is continuous through the communication hole of the hub member, and the flange of the sleeve member and the hub member are sandwiched to support the axial load. Further, the inner peripheral surface of the communication hole of the hub member and the coupling portion in the communication hole are engaged with each other, and the anti-rotation concave-convex member formed on the side surface of the flange of the multi-end side edge of the sleeve member is coupled. The combination with the parts prevents the hub member from rotating relative to the sleeve member against a load in the rotational direction. Further, by fitting the hub member to the sleeve member, abutting on the flange of the sleeve member,
Since the sleeve member and the hub member are integrally joined by the joining portion made of resin having high mechanical strength, the sleeve member and the hub member have sufficient strength against radial load and bending.

As described above, the most suitable resin and metal can be selected for the sleeve member, the hub member, and the connecting portion. In addition, since the sleeve member and the hub member are firmly joined by the joining portion by utilizing the flange of the sleeve member, the uneven portion of the flange, and the connecting hole of the hub member, this carrier has an axial direction, a rotational direction, and a radial direction. And it can have sufficient strength against a load such as bending.

<Example> Next, an example of the present invention shown in the drawings will be described in detail.

1 is a sectional view, FIG. 2 is a side view, and FIG.
It is a sectional view taken along the line I-I in the figure. In the figure,
11 is a carrier according to the present invention, and 12 is a bearing.
The carrier 11 has a structure in which a sleeve member 13 having a substantially cylindrical shape and a hub member 14 having a substantially brim shape are integrally connected by a connecting portion 15. The bearing 12 has a corrugated spring 18 between the end edge 17 a of the cover case 17 fixed to the carrier 11 and the contact surface 15 a of the coupling portion 15.
The outer ring 12a is held via the aligning ring 19 that also serves as a seal, and the plate 20 that is in contact with the diaphragm spring is fixed to the inner ring 12b. In addition, 21 is a rolling element, 22 is a cage, and 23 is a seal.

The sleeve member 13 is made of a synthetic resin molded product having lubricity, low sliding resistance, and high wear resistance, and has good slidability with respect to the guide retainer, and also wear. It is designed so that it is not easy to cause. Further, the hub member 14 is made of a metal that has been heat-treated so that durability and wear resistance will not be a problem even when subjected to repeated pressing force from the fork member. Furthermore, the connecting portion 15 places importance on durability strength,
For example, it is injection molded using a synthetic resin having high mechanical strength containing glass fibers.

Next, a structure in which the sleeve member 13 and the hub member 14 are integrally connected by the connecting portion 15 will be described.

As shown in FIGS. 3 (a) and 3 (b), the sleeve member 13 has
A flange 31 having a low height is provided on the outer periphery near one end edge, and on the side surface of the flange 31 on the other end edge side of the sleeve member 13, on the inner diameter side of the outer peripheral edge 31α of the flange 31,
An uneven portion 31b having a spline shape is formed. Further, a cylindrical portion 32 is formed on the edge side of the flange 31,
A thin projection 33 having a tongue-shaped cross section is formed on the inner diameter portion of the end edge, and a rounded rounded portion 34 is formed on the inner diameter portion of the other end edge. Reference numeral 35 is a grease reservoir groove. The shapes of these parts are formed at the same time when the sleeve member 13 is molded.

On the other hand, as shown in FIG. 4, a plurality of communication holes 41 are formed in the axial direction in the portion near the inner edge of the hub member 14 and radially outside the outer peripheral edge 31a of the flange 31 of the sleeve member 13. Correspondingly, a communication hole 42 is also formed in the cover case 17, and the cover case 17 is superposed on the hub member 14 so that these communication holes 41, 42 are aligned with each other, and the hub member 14 is caulked at the inner diameter portion. The cover case 17 is fixed to. Then, the hub member 14 to which the cover case 17 is fixed is fitted into the cylindrical portion 32 of the sleeve member 13, abutted against the flange 31 and positioned, and then the joint portion 15 is integrally molded.

The shape of the connecting portion 15 is continuous through the connecting holes 41 and 42, and the flange 31 and the hub member 14 are sandwiched from both sides thereof in a sandwich shape to be fixed in the axial direction and combined with the uneven portion 31b of the flange 31. The hub member 14 to which the sleeve member 13 and the cover case 17 are fixed and the three members of the coupling portion 15 are mutually coupled and firmly integrated with each other. Further, when the joint portion 15 is formed, the protrusion 33 of the sleeve member 13 is subjected to heat bending to be curved in the outer peripheral direction, that is, in the direction of the joint portion 15, whereby the inner diameter portion of the edge is rounded. The portion 33a is formed. The protrusion 33 and the flange 31 serve as a stopper that prevents the resin material from flowing out to an unnecessary portion when the joining portion 15 is molded, and by bending the protrusion 33,
It also acts to reinforce the axial and radial fixation of the coupling portion 15 and the sleeve member 13.

After forming the carrier 11 as shown in FIG. 5 by integrally molding the joint portion 15 as described above, the aligning ring 19, the bearing 12 and the wave spring 1 are formed on the contact surface 15a of the joint portion 15.
8 are arranged in this order, the end edge 17a of the cover case 17 is bent, and the bearing 12 is attached to complete the clutch release bearing device shown in FIG.

6 (a), (b) and (c) are modified examples of the anti-rotation uneven portion 31b formed on the flange 31, and FIG. 6 (a) shows triangular wave-shaped uneven portions, FIG. 6 (b) shows a gentle wavy shape, and FIG. 6 (c) shows a large number of small protrusions 31c projecting in the axial direction.

Further, when the anti-rotation strength is insufficient only with the uneven portion 31b of the flange 31, a spline-shaped uneven portion 32a is formed on the outer peripheral surface of the cylindrical portion 32 of the sleeve member 13 as shown in FIG. 7 (a). In response to this, the cover case 17
If the notch 17a is formed on the inner edge of the, and the concavo-convex portion 32a and the notch 17a are combined and then the joint 15 is integrally molded, a stronger detent can be achieved. FIG. 7 (b) shows a case in which a quadrangular protrusion is provided as the uneven portion 32a, FIG.
(c) shows each with a semi-circular protrusion.

FIG. 8 shows a plurality of connecting holes 41 of the hub member 14 having an L-shaped cross section in which the aligning ring 19 is eliminated and the inner edge is bent downward in the axial direction.
In the cover case 17 which is caulked and fixed as shown in FIG.
The outer ring 12a is held via the corrugated spring 18, and the connecting portion 15
And a sealed portion having a small gap S is formed between the end faces of the inner ring 12b and the inner ring 12b.

FIG. 9 shows the case of the cover case 17 of the embodiment of FIG.
A cylindrical portion 43 is formed on the outer circumference of the coupling portion 15 and extends from the outer circumference in the radial direction and the axial direction to cover the outer circumference of the outer ring 12a.
The outer ring 12a is connected to the coupling portion 1 by a leaf spring 45 having a substantially L-shaped cross section, which is fitted in an annular groove 44 provided on the outer periphery of the tip of the cylindrical portion 43.
The contact surface 15a of No. 5 is biased and held.

FIG. 10 shows a leaf spring 45 having a substantially L-shaped cross section in the embodiment shown in FIG.
Is omitted, the tip end of the cylindrical portion 43 is appropriately extended, the extension portion 46 is bent inward by a heat bending process and brought into contact with the end surface of the outer ring 12a, and the extension portion 46 joins the outer ring 12a to the joint portion 15.
The contact surface 15a is urged and held.

<Effects of the Invention> As is apparent from the above description, the present invention has the following effects, and solves various problems in performance, production and cost in a carrier for a clutch release bearing device. (A) It is possible to make each part of the carrier with a material suitable for each.

That is, the sleeve member having the sliding portion reduces the wear of the guide retainer more than the strength, and has the self-wear resistance and the small friction coefficient with respect to the guide retainer. It becomes possible to select the most suitable material by emphasizing the conditions such as the thermal expansion coefficient close to the material of the guide retainer (generally aluminum).
Further, it is possible to select the most suitable material for the hub member by emphasizing mechanical strength such as durability, wear resistance and rigidity. Further, for the joint portion, it is possible to select the most suitable material for this, with emphasis on fluidity and moldability such as injection molding, and mechanical strength such as strong joint between the sleeve member and the hub member. . Therefore, it is possible to satisfy all different requirements for each member.

(b) Inner diameter dimensional accuracy can be improved.

Since the sleeve member can be molded independently, and the protrusion on the outer peripheral part is only a flange with a low height and does not have a large protrusion, it can be made into a simple shape close to a cylinder instead of an anisotropic shape, so distortion, deformation etc. of the molded product Is reduced, and molding with high dimensional accuracy becomes possible.

(c) A rounded portion can be easily formed on the inner surface of both ends of the sleeve member.

Since a rounded portion can be formed at one end edge of the sleeve member at the time of molding the joint portion, it is sufficient to form a rounded portion at the other side at the time of molding the sleeve member, and it is necessary to form rounded portions at both ends at the time of molding using a complicated mold. The mold is easily manufactured, and no parting line is formed in the rounded portion. Further, unlike the case where rounding is performed by cutting or the like, the reinforcing material in the resin material is not exposed on the surface. Therefore, it becomes easy to form a good rounded portion that is unlikely to reduce slidability and cause galling of the guide retainer.

(d) The strength of the carrier is sufficient.

Since the flange of the sleeve member and the hub member are sandwiched by a joint that is made of a resin having mechanical strength and that is continuous through a continuous hole, and the joints are combined with the flange irregularities, the clutch release bearing It is possible to have practically sufficient strength against various loads acting on the device, such as the axial direction, the radial direction, the rotation direction, and bending, and it is possible to utilize the elastic force peculiar to the resin material.

(e) Integral molding is easy.

When integrally molding the joint, a part of the sleeve member can be used as a stopper that plays the role of a mold, so the property of the resin material with a high elastic limit can be used to improve the accuracy of other members and the accuracy of assembly. It can be manufactured without being affected. For example, as the hub member, a sheet metal product that is heat treated is generally used, but it is possible to perform integral molding with good dimensional accuracy without being affected by variations in plate thickness, press working accuracy, heat treatment distortion, etc. Becomes

(f) Cost can be reduced.

Although the resin material with the special specifications as described above is generally expensive, it can be used only in a necessary place, so that it is cheaper than the entire use. Further, it can be performed in the injection molding step without performing post-processing such as the grease reservoir groove and rounding of one end surface. Furthermore, because the inner diameter is finished with high accuracy, the cost of scrapping defective products can be reduced, and even if defective products are produced, only the sleeve members need to be scrapped. These overall results allow for reduced manufacturing costs.

[Brief description of drawings]

1 is a sectional view of an embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 (a) is a side view of a sleeve member, and FIG. 3 (b).
Is the same sectional view, FIG. 4 is an enlarged sectional view of the main part, FIG. 5 is a sectional view of the carrier before mounting the bearing, and FIGS. 6 (a), (b),
(c) is a side view of a sleeve member showing a modified example of the concavo-convex portion, FIG. 7 (a) is an enlarged cross-sectional view of the main part of another modified example, and FIGS. 7 (b) and (c) are respectively FIG. 7 (a) is a side view as seen from the direction of the arrow, FIG. 8, FIG. 9 and FIG. 10 are sectional views of a modified embodiment, and FIG. 11 is a sectional view of a conventional example. 11 ... Carrier, 12 ... Bearing, 13 ... Sleeve member, 14 ... Hub member, 15 ... Coupling portion, 31 ... Flange, 31b ... Concavo-convex portion, 33 ... Projection, 33a.
Rounded part, 41 ... Contact hole.

Claims (1)

[Claims] 1. A sleeve member into which a guide retainer is inserted is made of a resin molded product having high wear resistance and good slidability, and a low-height flange is formed on the outer periphery near one edge of the sleeve member. A collar-shaped hub that projects and is formed with a rotation-preventing concavo-convex portion on the side surface of the flange on the other end edge side of the sleeve that is closer to the inner diameter than the outer peripheral edge of the flange, and fork member for clutch operation abuts. The member is made of a metal having high mechanical strength, and a suitable number of communication holes are formed in the axial direction in the vicinity of the inner edge of the hub member and in the portion radially outside the outer peripheral edge of the flange of the sleeve member, The hub member is fitted into the sleeve member from the side where the flange is provided and brought into contact with the flange, and the hub member is continuous through the communication hole by integral molding of resin having high mechanical strength, and the hub member. To form a bond portion having a shape sandwiching the flange, the carrier of the clutch release bearing device is characterized in that integrally joined the said sleeve member and said hub member.