JPH0214663Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a clutch cover assembly for automobile clutches, etc., and more specifically to a clutch cover assembly in which a diaphragm spring is supported by a stud pin fixed to the clutch cover. Regarding the clutch cover assembly.

(Prior Art) Generally, in a friction clutch, the facing on the outer periphery of the clutch disk is brought into pressure contact with the flywheel by a pressure plate, so an increase in temperature of the facing, etc. is unavoidable, which may cause abnormal wear or seizure of the facing. In particular, with conventional diaphragm spring type clutches that use a diaphragm spring to bias the pressure plate toward the flywheel, the facing installation space is closed off by the diaphragm spring from the back side (the side opposite the flywheel). The internal temperature tends to rise, making the above problems more noticeable.

(Purpose of the invention) The present invention attempts to solve the above problems by introducing cold air from outside the clutch cover into the cover using stud pins for supporting the diaphragm spring.

(Structure of the invention) The invention arranges a diaphragm spring for biasing the pressure plate between the pressure plate and the clutch cover covering the back side of the pressure plate, and a stud pin for supporting the spring that passes through a notch in the spring. A cold air passage that is fixed to the clutch cover and connects the external space outside the clutch cover and the internal space where the pressure plate is installed is provided on the stud pin, and the inlet opening of the cold air passage on the external space side is aligned with the rotation direction of the diaphragm spring. The stud pin is provided with a cover that opens in the same direction and covers the inlet side end of the cold air passage having the inlet opening from the side opposite to the diaphragm spring and from the side opposite to the inlet opening.

(Example) In FIG. 1, which is a schematic cross-sectional view, a facing 3 is located between a flywheel 1 and an annular pressure plate 2 of an engine. The facing 3 is fixed to the outer periphery of a clutch disk 5 which is connected to an output shaft 4 (only the center line is shown). An annular diaphragm spring 6 is provided on the opposite side of the disk 5 with the pressure plate 2 in between. Spring 6 is pressure plate 2
It is a member for pushing the pressure plate 2 toward the facing 3, and its outer peripheral portion is in contact with the protrusion 7 on the back surface of the pressure plate 2 (the surface opposite to the facing 3). A release bearing 8 is provided on the opposite side of the disk 5 with the spring 6 in between. The release bearing 8 is adjacent to the inner circumference of the spring 6,
It is connected to a clutch operating mechanism (not shown).

The spring 6 is covered by a clutch cover 10 from the outer circumferential side and the rear side. The clutch cover 10 includes a generally annular end wall 11 and a cylindrical peripheral wall 12 extending from the outer periphery of the end wall 11 toward the flywheel 1 side.
The tip of the peripheral wall 12 is fixed to the flywheel 1. One end of a stud pin 13 is fixed to the inner circumference of the end wall 11. The pins 13 are provided at a plurality of locations at intervals in the circumferential direction of the cover 10, and each extends parallel to the output shaft 4. Each pin 13 passes from the end wall 11 through a notch 15 in the spring 6 to the pressure plate 2.
It protrudes to the side, and the large diameter portion 14 at the other end is located between the pressure plate 2 and the spring 6.

A pair of wire rings 19 and 20 are provided outside the pin 13 when viewed in the radial direction of the spring 6. The wire rings 19 and 20 are members that constitute the fulcrum of the spring 6, and the inner circumference of each wire ring is the pin 13.
Supported by The wire ring 19 is located between the spring 6 and the end wall 11, and the wire ring 20 is located between the spring 6 and the large diameter portion 14.

As shown in FIG. 2, which is a schematic cross-sectional view of FIG. is adapted to be seated on a pressure plate 2 (FIG. 1).
The spring 6 is provided with a slit 8 extending radially from the inner circumference to the middle part in the radial direction, and the inner circumference and the middle part of the spring 6 are divided by the slit 18 to form a number of radial tongue parts 17.
The notch 15 through which the pin 13 passes is formed by widening the slit 18 in the circumferential direction at a portion adjacent to the annular portion 16.

As shown in FIG. 1, the pin 13 has a hollow structure and is provided with a cold air passage 25 inside. The cold air passage 25 is formed of a hole that passes through the center of the pin 13 except for the inlet end, and is connected to the internal space 26 of the cover 10 in which the pressure plate 2 and the disk 5 are installed.
and an external space 27 outside the cover 10.

The end of the pin 13 on the external space 27 side is connected to the cover 10.
It is fitted into the hole 28 of the pin 13 and fixed by caulking, and more specifically, the periphery of the hole 28 is held between the middle large diameter part of the pin 13 and the caulking part 29 (large diameter part) at the tip. Fixed. The edge of the current plate 30 is held between the caulked portion 29 and the edge of the hole 28. The rectifier plate 30 is, for example, a cap-shaped sheet metal product or a synthetic resin molded product, and as shown in FIG. 3, which is a schematic cross-sectional view of FIG. It is formed in the same direction as R. That is, the inlet end of the cold air passage 25 has a center through hole of the pin 13 (a hole extending in the longitudinal direction of the center of the pin 13) and a space (an inlet) extending from the end of the hole on the external space 27 side to the outer periphery of the pin 13. The inlet end is provided with the opening 31, and the baffle plate 30 (cover) covers the inlet end from the side opposite to the diaphragm spring 6 and the side opposite to the inlet opening 31. It's on.

As shown in FIG. 1, a recess 32 is provided on the back surface of the pressure plate 2 at a portion facing the large diameter portion 14 of the pin 13, and the thickness T of the pressure plate 2 is the portion where the recess 32 is provided. 33 is thinner than other parts. The recess 32 is provided to avoid interference with the pin 13 when the clutch is disconnected, so that the large diameter portion 14 enters the recess 32 when the clutch is disconnected and the pressure plate 2 moves toward the pin 13. It's summery. Figure 1 -
As shown in FIG. 4, which is a schematic view of a portion viewed from the arrows, the edge of the recess 32 avoids the pin 13 and extends generally in a wave shape.

(Operation) When the clutch is disengaged, the inner peripheral part of the spring 6 is pushed toward the disk 5 by the release bearing 8, and the spring 6 deforms as shown by the two-dot chain line 6a in FIG. 1, releasing the pressing force against the pressure plate 2. do. When the clutch is connected, the pressing force of the release bearing 8 is released, and the spring 6 returns to its original solid line shape to press the pressure plate 2. This causes the pressure plate 2 to move to the facing 3.
is pressed against the flywheel 1 to connect the clutch, and torque is transmitted from the flywheel 1 to the output shaft 4 via the disk 5.

In both the connected state and the disconnected state, the clutch cover 10 rotates together with the flywheel 1, so the spring 6 also constantly rotates, and the pin 13 in FIG. 3 moves at high speed in the rotational direction R with the opening 31 at the top. do. Therefore, the cold air in the external space 27 flows into the cold air passage 25 through the opening 31 and is supplied to the internal space 26, and the pressure plate 2, facing 3, flywheel 1, etc. are cooled by this cold air. Moreover, since the cold air flowing into the internal space 26 collides with the thin walled portion 33 of the pressure plate 2, the facing 3 is effectively cooled via the portion 33. Furthermore, the cold air sufficiently cools the spring 6 and the wire rings 19, 20 while passing through the passage 25.

(Effect of the invention) As explained above, according to the invention, pin 13
Since cold air from the external space 27 is supplied to the internal space 26 through the internal cold air passage 25, the facing 3, spring 6, etc. are sufficiently cooled, preventing abnormal wear and seizure of various parts, and improving durability. can be improved. Moreover, since the cold air passage 25 is formed in the pin 13 itself, the weight can be reduced and the structure can be simplified compared to the case where the cold air passage is formed by a separate dedicated part. In addition, since a baffle plate 30 (cover) is attached to the pin 13 and the inlet opening 31 of the cold air passage 25 is aligned with the rotational direction R of the spring 6, cold air can be actively and efficiently flowed into the cooling passage 25. Therefore, the cooling effect on the facing 3 and the like can be enhanced.

(Modification) The rectifying plate 30 shown in FIG. 3 can also be formed of a rectifying section 34 integrated with the pin 13 as shown in FIG. 5.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of the embodiment, and FIG.
Figure 3 is a schematic cross-sectional view of Figure 1.
FIG. 4 is a schematic cross-sectional view of FIG. 1 taken in the direction of the - arrow, and FIG. 5 is a schematic cross-sectional view of another embodiment. 2... Pressure plate, 6... Diaphragm spring, 10... Cover, 13... Stud pin, 15... Notch, 25... Cold air passage, 2
6...Internal space, 27...External space, 31...Opening.

Claims (1)

[Scope of utility model registration request] A diaphragm spring for biasing the pressure plate is arranged between the pressure plate and the clutch cover that covers the back side of the pressure plate, and a stud pin for supporting the spring that passes through a notch in the spring is fixed to the clutch cover. A cold air passage connecting the outside space and the inner space where the pressure plate is installed is provided in the stud pin, and the inlet opening of the cold air passage on the side of the external space is opened in the same direction as the rotational direction of the diaphragm spring, and the inlet opening is opened in the same direction as the rotation direction of the diaphragm spring. A clutch cover assembly characterized in that a stud pin is provided with a cover that covers an inlet end of a cold air passage having an opening from a side opposite to a diaphragm spring and from a side opposite to the inlet opening.