JPH026272Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a clutch disk.

In vehicle clutches, displacement in the rotational direction (torsion) is applied between the hub plate and the clutch plate, which make up the clutch disk, in order to reduce the impact of the connection and absorb torsional vibration. It is.

By the way, in order to make the above effect effective against vibrations in the rotational direction when the engine is idling, the clutch disk is required to have a wide torsion angle of the first stage spring, but in reality this is due to space constraints within the clutch. Therefore, there is a certain limit to the widening of the torsion angle.

This idea was created in view of the actual situation,
The object is to provide a clutch disk that can widen the torsion angle of the first stage spring and improve its characteristics.

In order to achieve such an object, the present invention includes a hub plate having a spline in the center and a plurality of stopper pin receivers formed on the outer periphery, and a stopper pin to be engaged with the stopper pin receivers of the hub plate. A clutch disk comprising: a clutch plate, wherein the stopper pin receiving portion has a gap in the circumferential direction with respect to the stopper pin so as to allow relative rotation of a predetermined amount between the hub plate and the clutch plate; a spring support pin protruding from the stopper pin on the clutch plate at a position radially outward;
An engaging recess formed in the center portion and engaged with the spring support pin extends from the engaging recess toward the stopper pin receiving portion, and the distal end abuts the stopper pin receiving portion to connect the hub plate and the clutch. It is characterized by comprising a first stage spring consisting of one strip plate having two arm parts that are elastically deformed by relative rotation with the plate.

A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of the main parts of a clutch disk according to the present invention, and FIG. 2 is a diagram showing characteristics of the clutch disk.

In the clutch disk shown in FIG. 1, reference numeral 1 denotes a hub plate having a spline 2 at its center, which is spline-fitted to a clutch shaft (not shown) via the spline 2 so as to be movable in the axial direction. On the outer periphery of the hub plate 1, there is a stopper pin receiving part 1 forming an angle θ ₀ as shown in the figure.
a is formed. The width of this stopper pin receiving portion 1a is larger than that of the conventional one, and therefore the angle θ ₀ is set larger than that of the conventional one.

On the other hand, in the figure, reference numeral 3 designates a clutch plate made up of a friction material 4 stretched with a constant width on both sides of its outer periphery.
As shown in the figure, a stopper pin 5 is provided protrudingly to engage with the stopper pin receiving portion 1a provided on the hub plate 1.

By the way, as shown in the figure, a first stage spring 6 made of a band plate is housed in the stopper pin receiving part 1a of the hub plate 1, and the first stage spring 6 has an engagement recess 6a formed in its center. A spring support pin 7 protruding from the clutch plate 3 at a position radially outward from the stopper pin 5 is engaged with the recess 6a.

When the clutch plate 3 is pressed by a flywheel (not shown) that rotates together with the crankshaft, the clutch plate 3 rotates together with the flywheel due to the frictional resistance generated between the clutch plate 3 and the flywheel. Until the provided stopper pin 5 engages with the stopper pin receiving portion 1a provided on the hub plate 1, the clutch plate 3 rotates relative to the hub plate 1 by an angle θ ₂ . Therefore, the second
As shown in the figure, until the torsion angle θ reaches θ ₁ , which is the range in which only the first stage spring 6 deforms, almost no engine power is transmitted from the crankshaft side to the clutch shaft side, and during this time, the transmitted torque is as shown in the figure. T is substantially approximately zero (T=0). During this time, the first stage spring 6 is deflected, and its buffering action alleviates the impact, particularly the vibration in the rotational direction when the engine is idling.

Then, the stopper pin 5 protruding from the clutch plate 3 is connected to the stopper pin receiving portion 1 of the hub plate 1.
The engine power is transmitted to the clutch shaft through the clutch plate 3, the second and subsequent stage springs (not shown), and the hub plate 1 until the engine contacts a. second
As shown in the figure, the stopper pin 5 is further twisted to an angle θ ₂ at which it comes into contact with the stopper pin receiving portion 1a. Therefore, when the torsion angle θ is from θ ₁ to θ ₂ , the torque transmission to the clutch shaft increases linearly, and the torsion angle θ
When reaches θ ₂ , the transmitted torque T becomes the rated torque.
becomes equal to Ts.

By the way, the characteristics of the conventional clutch disk are shown by the broken line in FIG. 2, and as is clear from the comparison with this, the clutch disk according to the present invention can have a larger torsion angle θ of the first stage spring.
Compared to conventional products, the shock and torsional vibration absorption capacity can be improved.

As is clear from the above description, according to the present invention, the width of the stopper pin receiver formed on the outer periphery of the hub plate is expanded, the first stage spring is housed in the stopper pin receiver, and the first stage spring is projected from the clutch plate. Since it is engaged and supported by the provided spring support pin, it is possible to widen the torsion angle of the first stage spring of the clutch disk and improve its characteristics. In particular, since both ends of the first stage spring engage with the stopper pin receiving part, there is no impact on the space for the well-known second and subsequent stage torsion springs that are conventionally provided on the hub plate. In addition, the first stage spring made of a strip plate can be installed extremely easily and is securely held between the spring supporting pin receiving portion, so that a clutch disk that is extremely useful in practice can be obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the main parts of a clutch disk according to the present invention, and FIG. 2 is a characteristic diagram of the clutch disk. In the drawings, 1 is a hub plate, 1a is a stopper pin receiver, 3 is a clutch plate, 5 is a stopper pin, 6 is a first stage spring, and 7 is a spring support pin.

Claims (1)

[Scope of utility model registration request] A hub plate having a spline in the center and a plurality of stopper pin receiving parts formed on the outer periphery, and a clutch plate having a stopper pin projecting to be engaged with the stopper pin receiving parts of the hub plate, In the clutch disk, the stopper pin receiving portion has a gap in the circumferential direction from the stopper pin so as to allow relative rotation of the hub plate and the clutch plate by a predetermined amount, a spring support pin protruding at a horizontal position; an engagement recess formed in the center and engaged with the spring support pin; and a distal end extending from the engagement recess toward the stopper pin receiver. 1. A clutch disk comprising: a first stage spring made of a single strip plate having two arm portions that come into contact with the clutch plate and are elastically deformed by relative rotation between the hub plate and the clutch plate.