JPS5913126A - Clutch of plate spring type - Google Patents

Abstract

PURPOSE:To dispense with a buffer spring and simplify a construction, by providing a pair of fulcrum rings which are interposed to pivotally couple a plate spring to a clutch cover and are springs which are wave-shaped so that flexural load is caused in the direction of the load upon the plate spring. CONSTITUTION:A plate spring 7 is pivotally connected to a clutch cover 6 through a pair of fulcrum rings 8 located on both the sides of the plate spring 7. The peripheral part of the plate spring 7 is anchored to a pressure plate 5 by a clip 10. One or both of the fulcrum rings 8 are made of wave-shaped springs so that flexural load is caused in the direction of the load upon the plate spring 7. A friction plate 2 is gradually pinched between a flywheel 4 and the pressure plate 5 by the spring forces of the fulcrum rings 8 caused at the stroke of the plate 5. According to this constitution, a conventional buffer spring is not needed. As a result, the friction plate 2 is directly secured on a drive plate 3a.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disc spring type clutch used in an automobile power transmission system or the like.

FIG. 1 is a sectional view showing the general structure of a disc spring type clutch. That is, reference numeral 1 includes a friction plate 2.2, which is a companion clutch plate, and is fixed to both sides of a buffer spring member 3 having a spring reaction force t in the axial direction.
is integrally fixed to the drive plate 3a. 4
is a flywheel, and 6 is a pressure plate. 6
is a clutch cover 6, and a disc spring 7 is attached to this clutch cover 6. t-A pair of fulcrum rings sandwiched between the inside and outside 8.
The plate spring 7 is pivoted at 9 via 8 and 9, and furthermore, this disc spring 7 is locked to the pressure plate 5 at its outer periphery by means of a clip 10.

FIG. 1 shows the connected state of the clutch [7, the spring force of the disc spring 7 acts on the pressure plate] 5, and the pressure plate 6 acts on the friction plate 2.2 of the clutch plate 1 and the lie wheel 4.
is being pressed. To completely disengage the clutch from this state, press the vicinity of the inner peripheral end of the disc spring 7 via the release bearing (not shown) on the clutch pedal, as well known. nru. Next, the clutch is reconnected by removing the releasing force applied to the vicinity of the inner peripheral end, and this operation is as follows. That is,
The pressure plate 6 moves to the left in the figure under the force of the disc spring 7 acting on the clutch plate 1, and begins to press against the friction plate 2.2'lH of the clutch plate 1 and the rotating flywheel 4. At this time, the buffer spring member 3 of the clutch plate 1 acts, and the friction plate 2.2 is moved between the flywheel 4 and the pressure plate 6 by the spring force of the buffer spring member 3 generated in accordance with the stroke of the pressure plate 6. Gradually squeeze the pressure between
That will happen. During this process, clutch plate 1#-
j7 is rotating with some slippage between the lie wheel 4 and the pressure grate 6, but gradually the disc spring 7
The spring force increases, and as a result, the friction plate 2゜2 is clamped between the flywheel 4 and the pressure plate 5 with a strong spring force, and the clutch plate 1 is synchronized with the 40 revolutions of the flywheel, causing the clutch to rotate. The connection is complete. In order to smoothly connect this clutch, it is most important to control the time during which the clutch plate 1 is slipping between the 7 life wheels 4 and the 1 glacier plate 6. Therefore, the buffer spring member 3 is provided.

By the way, the inventor has been conducting research to simplify and reduce the cost of the entire clutch device, and as a result, the buffer spring member 3 of the clutch plate 1 has been abolished, and the friction plate 2゜2'Jk direct drive plate) 3d [hard It is an extremely effective means of layering. In this case, it is necessary to add a member or performance equivalent to the buffer spring member 3 provided on the clutch plate 1, but instead of eliminating the buffer spring member 3,
If new fc and VC were added to the corresponding parts, the number of parts would not be reduced, and it would be difficult to simplify and reduce the cost of the entire clutch device.In order to simplify and reduce the cost, Vr
The buffer spring member 3 is added to the existing member without adding a new member.
It is desirable to add this function.

In order to satisfy this desire, the present invention #I focuses on the fulcrum ring that pivots the disc spring, which is an existing member, and adds a spring force equivalent to that of the spring member, resulting in a simple structure. It was created with the aim of obtaining a low-friction disc spring type clutch, and its main structure is the second one.
1. Shown in the drawings below. In addition, one or both of the fulcrum rings 8.8 and 7t are formed of a wave-shaped spring member so as to generate a deflection load in the load direction of the disc spring 7.1. That's true.

In the embodiment shown in FIGS. 2 to 4, the friction plate 2 is directly fixed to the drive plate 3a without using the buffer spring member 3. In addition, the inner end of the clutch cover 6 is folded 9
By turning K, a concave groove-shaped disc spring pivot part aa is formed, and the concave groove-shaped disc spring pivot part 6aK disc spring 7 is sandwiched between the inside and outside of F by the fulcrum ring 8.8. In this way, the IM is directly supported (without riveting). Note that δ is the deflection allowance.

Next, we will discuss its effect. The pressure grate 6 moves to the left in the figure under the spring force of the disc spring 7 acting on the grate. Spring force acts t
2. The friction plate 2.2 is gradually clamped between the flywheel 4 and the pressure plate 60 by the spring force of the fulcrum ring 8 generated with the stroke of the pressure plate 6. Ru.

Thus, the fulcrum ring Aij performs the same function as the conventional buffer spring member 3 and smoothes the clutch connection.

The embodiment shown in FIG.
Use [7, fulcrum ring 8, 8 mechanism 1. In the case where the disc spring 7 is pivotally supported on the clutch cover 6, the configuration 1. ing.

As mentioned above, the present invention has one advantage in omitting the buffer spring member.
Although the primary objective is to simplify the structure of the disc spring type clutch, a further cushioning effect can be obtained if the buffer spring member is not omitted.

As explained above, in the clutch in which the textured disc spring of the present invention is pivotally supported by the clutch cover π via the pair of fulcrum rings that sandwich the inner and outer surfaces of the clutch cover π, one or both of the pair of fulcrum rings The spring member is formed into a wave shape so as to generate a deflection load in the load direction of the disc spring, and is characterized by being a ring-shaped spring member as a whole.
Eliminating all buffer spring members 11 has the effect of making it possible to obtain a product with a simple structure and low friction.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional disc spring type clutch, Fig. 2 is a lllfi side view of the disc spring type clutch of the present invention, Fig. 3 is a plane view of the fulcrum ring, Fig. 4 is a side view of the same, and Fig. 5 is a cross-sectional view of a conventional disc spring type clutch. The figure is a rlfr plane view of another embodiment. 6... Clutch cover 7... Disc spring 8... Fulcrum ring JP-A-59-13126 (4)

Claims (1)

[Claims] (1) In a clutch in which a disc spring is pivotally supported on a clutch cover via a pair of fulcrum rings that sandwich the inner and outer surfaces of the disc spring, one or both of the pair of fulcrum rings 72: A disc spring type clutch, characterized in that the nyF-1 is a ring-shaped spring member formed as a whole in a wave shape so as to generate a deflection load in the loading direction of the disc spring.