JPH0218358Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a structure for attaching a facing to the facing attachment part (driven plate or cushioning plate) of a clutch disk for a friction clutch, and in particular uses sintered body facings and organic facings as facings. This applies to combination type clutch disks used in combination.

As shown in FIG. 1, which is a schematic front view, the clutch disk has ceramic facings 2 (a sintered body of metal powder mainly composed of ceramic and copper) fixed to, for example, eight locations on a facing mounting plate 1 on the outer periphery of the disk. However, it has a structure in which the organic facing 3 is fixed to a part other than the part to which the facing 2 is attached. Such discs are currently under development in order to improve the wear resistance of facings and clutch performance. However, in the structure that has already been proposed, −
As shown in FIG. 2, which is an enlarged partial cross-sectional view, since the organic facings 3, 3 on both sides of the mounting plate 1 are fixed with rivets 4, the inner periphery of the rivet mounting hole 5 of the facing 3 There are problems in that cracks are likely to occur in the facing 3 and the burst strength (rotational strength) of the facing 3 is low. Also, since the facing 3 is not annular but arcuate,
This is also a factor in reducing the burst strength.

In order to solve the above-mentioned problems, the present invention molds the organic facings on both sides of the facing mounting plate integrally with each other through the portions that penetrate into the holes of the mounting plate, thereby riveting the organic facings. In other words, the present invention is a clutch disk that uses a combination of a sintered body facing and an organic facing, and is based on Utility Model Application No. 56-98240 filed by the applicant. No. (1986-)
The above-mentioned problem is attempted to be solved by employing an organic facing mounting technique such as that described in No. 2425).

That is, in the present invention, sintered facings are fixed with rivets to both sides of a facing mounting plate at a plurality of locations on the outer periphery of the clutch disk, and the parts other than the sintered facing mounting parts are connected to the inner periphery of the mounting plate. A plurality of holes are provided at regular intervals in the circumferential direction in each of the parts near the outer periphery, and a pair of organik facings are arranged along both sides of the mounting plate, and both organik facings are The organ facings are fixed to the mounting plate by integrally molding each other through the facing parts that have entered the holes, and the total area of the holes provided near the outer periphery of the mounting plate is reduced to the inner periphery. It is characterized in that the area is larger than the total area of the holes provided.

Next, embodiments will be described with reference to the drawings.

In FIG. 3, which is a schematic front view, ceramic facings 2 are fixed to both sides of the facing mounting plate 1 at three equally spaced locations in the circumferential direction by rivets 6 (fasteners) as will be described later. Each facing 2 has a generally arcuate shape close to a rectangle (short in the circumferential direction), and an arcuate organic facing 7 which is relatively long in the circumferential direction is provided between the facings 2 . Organic Facing 7 is made by adding rubber or phenolic resin binder to asbestos thread and molding it.
As shown in FIG. 4, which is an enlarged partial cross-sectional view of FIG. 3, facings 7, 7 provided on both sides of the mounting plate 1
are integrated with each other at the facing portions 12 that enter the punched holes 9, 10, 11 of the mounting plate 1, and this integrated structure allows the facing 7 to be fixed in close contact with the mounting plate 1.

In the illustrated embodiment, the following measures are taken in connection with the holes 9, 10, and 11. That is, when the facings 7, 7 are held between the pressure plate and the flywheel (both not shown) when the clutch is connected, and torque is transmitted from the flywheel to the mounting plate 1 via the facings 7, Along the outer periphery 15 of the facing 7
(Fig. 3), a large load is applied to the inner circumference 17.
A relatively small load is applied to the In response to this load distribution, large-diameter holes 9, medium-diameter A hole 10 and a small diameter hole 11 are provided, and the facing fixing strength by the connecting portion 12 is
5 is large, and the inner peripheral portion 17 is relatively small. In this way, since the load distribution state caused by torque corresponds to the fixing strength of each part of the facing 7, the facing 7 will not be damaged and detached from the mounting plate 1. Note that instead of the structure shown in FIG. 3, the diameters of the holes 9, 10, and 11 are made constant, and a large number of holes 9 are provided on the outer periphery of the mounting plate 1, and a small number of holes 11 are provided on the inner periphery. You can also do that. In addition to these structures, the facing fixing strength can be made to correspond to the load by appropriately setting the diameter and number of the holes 9, 10, and 11. Hole 9, 10, 1
1 need not necessarily be provided in three rows on the outer periphery, middle, and inner periphery, but may be provided in four or more rows or in two rows.

The facing 7 includes a thin arc-shaped continuous portion 14 extending along the inner edge 2a and outer edge 2b of the ceramic facing 2, and the portion 14 continues the entire facing 7 in an annular shape, in other words, the facing 7 is adjacent to the facing 2 with the facing 2 in between. The facings 7, 7 are connected together. Further, grooves 18 are provided on the surface of the facing 7. Groove 18 is facing 7
It is inclined with respect to the radial direction and rotational direction R of the facing 7, and is provided for the purpose of discharging abrasion powder generated from the facing 7. Two-dot chain line 18'
When the groove 18 is provided adjacent to the front of the facing 2 in the rotational direction R, as shown in FIG.

The friction surface 20 of the facing 2 can be exposed to the outside, as shown in the left half of FIG. 5, which is an enlarged cross-sectional partial view of FIG. 3, or as shown in the right half of FIG. In this case, the friction surface 20 can also be thinly covered by the organic facing 7. Note that 21 in FIG. 5 is a cup made of a metal plate that holds the facing 2, and is fitted to the back surface of the facing 2 (the surface on the mounting plate 1 side) and the peripheral edge near the back surface, and the cup 21 is attached to the rivet 6. It is fixed to the mounting plate 1 by.

The mounting structure of the facing 7 described above is obtained by molding. Specifically, after the ceramic facing 2 has been fixed, a flexible material of the organic facing 7 is placed on both sides of the mounting plate 1. A facing 7 having a predetermined size and shape is formed by heating and compressing the material, and at this time, the material portions that have penetrated the entire interior of the holes 9, 10, and 11 are integrated with each other to form a connecting portion 12.

As explained above, according to the present invention, ceramic facings 2 (sintered compact facings) are fixed to both sides of the facing mounting plate 1 at a plurality of locations on the outer periphery of the clutch disk with rivets 6, and Arrange the organik facings 7 on both sides of the mounting plate 1 at the part shown in FIG.
Since the facing 7 is fixed to the mounting plate 1 by integrally molding the mounting plate 1 through the facing portions 12 that have penetrated into the holes 9, 10, and 11 of the mounting plate 1, rivets are not required as a means for fixing the facing 7. I don't. Therefore, there is no fear that cracks will form in the facing 7 from the inner periphery of the rivet hole, and the burst strength of the facing 7 can be improved.

Furthermore, in the present invention, the total area of the holes (for example, hole 9) provided near the outer circumference of the facing mounting plate 1 is made larger than the total area of the holes (for example, hole 11) on the inner circumference side, and The holes near the periphery are provided at regular intervals in the circumferential direction, and the fixing strength of the connecting part (facing part 12) is made to correspond to the load distribution state caused by torque, so the facing of the organik facing 7 can be ensured. It can be fixed to the mounting plate 1.

Furthermore, compared to the case where the facing mounting plate 1 is used as the organik facing fixing means, the present invention has fewer restrictions on the specifications of each part and is easier to manufacture, as will be explained below.

That is, when fixing a facing by baking, the fixing strength depends on the contact area (baked area) and dimensions of the facing and the driven plate, and the surface roughness and material of the driven plate. On the other hand, if, as in the present invention, only the integral part of the facing in the hole is used as the main fixing means, the fixing strength depends mainly only on the number and size of the holes. Moreover, it is extremely easy to accurately set the number and size of such holes. As described above, in the present invention, the factors that determine the fixing strength can be easily set, and therefore manufacturing is easy.

Further, as in the illustrated embodiment, if continuous parts 14 of the organic facing 7 are provided on the inside and outside of the ceramic facing 2, and the entire facing 7 is continuous in an annular shape by the parts 14, the facing 7 can be easily resisted against transmitted torque and centrifugal force. 7. The strength of the entire structure can be improved.

In addition, when embodying the present invention, -
As shown in FIG. 6 corresponding to the cross section, holes 9, 10, 11
It can be formed by cutting and raising. By doing so, the cut and raised pieces 25 are embedded in the facing 7 and serve as an anchor, so that the fixing strength of the facing 7 is further increased. Cut-and-raised piece 2
5 is inclined with respect to the surface of the mounting plate 1 as shown in the figure, and the cut and raised piece 25 is made to protrude from the proximal end to the distal end in a direction opposite to the clutch rotation direction R, so that the facing 7 is subjected to torque. In this case, the torque acts in a direction that causes the facing 7 to bite into the cut and raised piece 25, so that the fixing strength is further increased.

Ceramic facings can also be used in place of the ceramic facings 2.

[Brief explanation of the drawing]

Figure 1 is a schematic front view of the conventional example, and Figure 2 is the front view of the conventional example.
FIG. 3 is a schematic front view of the embodiment of the present invention, and FIGS. 4, 5, and 6 are enlarged partial views of -, -, and - of FIG. 3, respectively. 1... Facing mounting plate, 2...
...Cerametallic facing, 6...Rivet, 7...Organic facing, 9,1
0, 11...hole, 12...facing part.

Claims (1)

[Scope of utility model registration request] Sintered facings are fixed to both sides of the facing mounting plate at multiple locations on the outer periphery of the clutch disk using rivets. , a plurality of holes are provided at regular intervals in the circumferential direction, a pair of organic facings are arranged along both sides of the mounting plate, and both organic facings are inserted into the holes. The organ facings are fixed to the mounting plate by integrally molding the parts, and the total area of the holes provided on the outer periphery of the mounting plate is equal to the total area of the holes provided on the inner periphery of the mounting plate. The facing mounting structure of the clutch disk is characterized by being larger than the surface area.