DE3506769A1 - Clutch control system - Google Patents

Abstract

The invention relates to a clutch control system in which a clutch release bearing for engaging and releasing a friction clutch is connected by way of a clutch release control system in the manner of a clutch release fork to a clutch operating element, an elastic element, for example a spring, according to one characteristic of the invention, being provided in the clutch release control system.

Description

Dipl.-Jiig. Otto Huegel, Dipl.-Ing. Manfred Siigcr. Patent attorneys, Cosimnstr. 81, D-8 Munich 81

For the present application, priority is given to Japanese Utility Model Application No. 59-27664 dated Claimed February 27, 1984.

The invention relates to a clutch control system for engaging and disengaging a friction clutch.

There are clutch plates that are especially designed to improve maneuverability and the feel of the Driver when engaging the clutch have a damping property. However, it is difficult to find one To give clutch disc made of ceramic material or metal such a damping property. Furthermore it has been found that this damping property is due to frictional heat or the like Influences is often weakened. That means deviations in the spring characteristics lead to disadvantageous Way to reduce the elasticity of the spring device.

The invention is therefore based on the object of designing a clutch control system in such a way that the driver a better feeling when the clutch is engaged, half engagement and full Engagement of the clutch facilitated and the influence caused by frictional heat in terms of performance stability is decreased.

In the case of an object according to the preamble of claim 1, this object is achieved according to the invention by the latter characteristic features solved.

Dipl.-Ing. Otto ΠϋροΙ. Dipl.-lnp. M.inl'icd super. I'nlcniiiinv.ilte. Cosim; istr. Rl. I) -R Munich 81

This is in a clutch control system according to the invention a release bearing for engaging and disengaging a friction clutch via a release control system connected in the manner of a release fork with a clutch actuation unit, according to a characteristic Feature of the invention an elastic element, for example a spring, in the release control system is provided.

Advantageous configurations and developments of the invention are characterized in the subclaims.

The description of preferred embodiments follows of the invention in connection with the drawings.

It shows:

Figure 1

a longitudinal sectional view of certain areas of a clutch control system according to a first preferred embodiment of the invention;

FIG. 2 shows a diagram to illustrate the relationship between load and stroke or distance of movement the clutch actuator;

Figure 3

Figure 4

Figure 5

Figure 6.

each a longitudinal sectional view of certain areas of a clutch control system according to various preferred embodiments of the invention.

Dipl -Inn. Olli »l-liipL · !. Ι) ί | ΐΙ. Ιιιμ Μ; ΐηΙϊαΙ S; ipor, Palcnl.inwjlto. C'osimaslr. 81. I) -8 Munich 81

In Figure 1, in which an arrow F indicates the forward direction, is around the center of rotation or the Line 0, - 0, a clutch housing 12 attached to an input-side flywheel 11. In the clutch housing 12, a coaxial pressure plate 13 is arranged, and a clutch plate 14 is between the flywheel 11 and the pressure plate 13 are provided. A diaphragm spring 15 presses against with its outer periphery the back of the pressure plate 13. At its inner periphery, the diaphragm spring 15 is coaxial with the Clutch housing 12 held or supported. The spring 15 is designed to be compressible, this being Base serves as a storage point. The diaphragm spring 15 is arranged so that its inner peripheral end can be brought into contact under pressure with a release bearing 20, the axis of which is in the center line 0, - 0, is located. The release bearing 20 is an annular member that extends in the direction of the center line 0, - 0, is slidably held on the center line by a support shaft, not shown.

The rear side of the release bearing 20 comes into contact with the inner peripheral end of a release fork 21 which is arranged in a substantially radial direction _{with respect to the center line O 1} -O _1. The release fork 21 is held in its central area by a bolt 22 in such a way that it can be rotated _{in the direction of the arrow X 1.} The fork 21 has at its outer peripheral end a bore 23 which extends essentially parallel to the center line O ₁ -O ₁ . The front end of a cable 24, which is connected to a clutch actuation element (for example a clutch pedal not shown), is slidably inserted into the bore 23.

Dipl.-Iiii ·. Otto Iliijid.

-Ιημ. Μ.ιηΓίγιΙ sawmill, I'alenlamv.ilte, C'osmiasir. Xl, l) -8 Munich 81

A cup-shaped spring bearing 25 is on that area of the cable 24 set, which leads away from the release fork 21 to the front. A coil spring 26 is between the spring bearing 2 5 and the release fork 21 arranged, the edge of the cup-shaped spring bearing 25 of the Release fork 21 is facing.

The function of the clutch control system according to the invention is explained below in connection with FIG. in which the relation between the load P and the stroke S (e.g. the pedal stroke) of a clutch actuator is shown.

In Figure 1, in which the clutch is shown in the engaged state, the stroke S corresponds to zero. The clutch disk 14 is located between the flywheel 11 by spring loading or loading of the diaphragm spring 15 and the pressure plate 13 held. The torque emanating from the flywheel 11 is therefore transferred to the clutch disc 14.

If the clutch pedal (not shown) is pressed down, the stroke S becomes large. The thrust or thrust load P of the pressure plate 13 and that P _{r of} the release bearing 20, which each act on the diaphragm spring 15, differ from one another in this case, as shown in FIG. When the stroke S reaches the value Sl, the clutch is completely disengaged. While the pedal is being depressed, the cable 24 moves in the direction opposite to the arrow F in FIG. Since the cable 24 is slidably inserted into the opening 23, the coil spring 26 is compressed. Therefore, the stroke length s2 of stroke S required for complete engagement of the clutch is correspondingly lengthened.

l) i | il Inn OUo l-'liipcl, Dipl -Ing. Manfred Säger, I'atuiitanwiilte, ('osimastr. 81, DH Munich 81

When the pedal is slowly released from the clutch release position, the stroke S in Figure 2 approaches slowly to the value zero, and the clutch is engaged in the reverse sequence of the sequence described above. The distance s2 between the starting point of engagement si of the clutch and the point at which the The stroke reaches zero is long. The so-called half-engaged state of the clutch becomes therefore expanded and made it easier to engage the clutch.

The arrangement of the coil spring 26 outside the clutch cover 12 weakens the influence of frictional heat in the clutch housing on the spring 26 is exercised. This enables stable, that is to say constant, operation of the spring 26.

With the clutch control system according to the invention, at which a release bearing 20 for engaging and disengaging a friction clutch via a release control system in the manner of a release fork with a clutch actuator (for example a clutch pedal) connected and an elastic element in the manner of a Spring (e.g. coil spring 26) in the release control system is provided, the following advantages are achieved:

(a) The driver is given a better feeling of engaging the clutch.

(b) The process of half-engaging and fully engaging the clutch is facilitated.

Dipl.-Ing. Otto Huegel, Dipl.-Ing. Manfred Siiger. Patent Attorneys, Cosiinastr. 81. D-8 Munich 81

(c) The influence of frictional heat is largely reduced, making it more stable or constant Operation ensured.

Modifications of the invention are described below in connection with Figures 3 to 6:

(a) Instead of the coil spring 26, a conical spring can be used.

(b) As can be seen from FIG. 3, a coil spring 27 can be inserted between the cable 24 and the release fork 21 to be ordered.

(c) In the case of a sliding clutch, a coil spring 29 can be positioned between the release fork 21 and a push rod 28 can be arranged on the side of the clutch actuation element, as shown in FIG is. An element 30 is cylindrical and serves to guide the helical spring 29. The element 30 is welded to the release fork 21.

(d) In the embodiment shown in FIG an elastic element is arranged between the release bearing 20 and the release fork 21 .. The release fork 21 comes into contact with the back of a cup-shaped spring bearing 31, which is attached to a cylindrical Area 20a of the release bearing 20 is held displaceably. A coil spring 32, the axis of which is attached the center line 0, - 0, is with its end faces between the spring bearing 31 and the cylindrical Area 20a arranged. The one encompassed by the edge region of the cup-shaped spring bearing 31 acts here Helical spring 32 in the same way as helical spring 26 in FIG. 1.

Dipl.-Ing. OtIo Huegel, Dipl.-Ing. Manfred Siigcr, patent attorneys, Cosimastr. 81, D-8 NJünchejn U ...

(e) Instead of the helical spring 32 according to FIG. 5, a multiplicity of helical springs with a small diameter are used, which are arranged in the circumferential direction at regular intervals.

(f) The coil springs 26 and 32 can also be replaced by a rubber ring.

(g) As FIG. 6 shows, a coil spring 36 can be arranged between a clutch pedal 35 and the cable 24 will.

(h) In one embodiment, according to which the release fork 21 in Figure 1 operated without the use of the cable 24 by a hydraulic mechanism an elastic element between such a hydraulic mechanism and the release fork 21 arranged or the design according to Figure 5 can be selected.

ORIGINAL

Dipl.-Ing. OUo ΙΊί'ιμοΙ. Pipl.-Ιημ. Manfred S.ijicr. l'ak'iihiinva'ltc, Cosimaslr. 81, I) -H Munich

11 ... flywheel

12 ... clutch housing

13 ... pressure or pressure plate

14 ... clutch disc

15 ... diaphragm spring

20 ... release bearing

20a ... cylindrical area

21 ... release fork

22 ... bolt 2 3 ... hole 24 ... cable

2 5 ... spring bearing

26 ... coil spring

27 ... coil spring

28 ... push rod

29 ... coil spring

30 ... cylindrical guide element

31 ... spring bearing

32 ... coil spring

3 5 ... clutch pedal 36 ... coil spring

Claims (7)

Claims 1. Clutch control system in which a release bearing is used to engage and disengage a friction clutch a release control system in the manner of a release fork is connected to a clutch actuator, characterized in that in the release control system (21) an elastic element in Form of a spring (26; 27; 29; 32; 36) is provided. 2. clutch control system according to claim 1, characterized in that the release fork (21) in its end located on the outer circumferential side of the coupling substantially parallel to the center line (0, - 0,) extending bore (23) that the front end of a with the Clutch actuator connected cable (24) is slidably inserted into the bore (23) that a spring bearing (25) is attached to the portion of the cable (24) which extends from the release fork (21) to the front discharges, and that a spring (26) is arranged in the spring bearing (25) and the release fork (21). 3. clutch control system according to claim!, Characterized in that a spring (27) between the front end of the dome with the clutch actuator connected cable (24) and on Dipl.-Iiig. Otto Huegel, Dipl.-Ing. Manfred Säger, I'atenlanwMte, Cosimastr. 81, D-8 Munich 81 the outer peripheral side of the coupling end the release fork (21) is arranged. 4. clutch control system according to claim 1, characterized in that in the designed as a sliding clutch coupling a push rod (28) on the side of the clutch actuation element is arranged that between the end of the push rod (28) and that on the outer peripheral side of the Coupling located end of the release fork (21) a spring (29) is arranged and that a spring (29) receiving guide element (30) is welded to the release fork (21). 5. clutch control system according to claim 1, characterized in that a spring bearing (31) is held displaceably on a cylindrical region (20a) of the release bearing (20) that the back of the spring bearing (31) with the end of the located on the inner circumferential side of the coupling Release fork (21) comes into contact and that a coaxially extending spring (32) to the clutch between the spring bearing (31) and the end surface of the cylindrical portion (20a) is arranged. 6. clutch control system according to claim 1, characterized in that the clutch actuator is provided in the form of a clutch pedal (35) and that the spring (36) between the clutch pedal (35) and the rear end of the cable (24) connected to the release fork (21) is. Dipl.-Ing. Otto Flügel, Dipl.-Ing. Manfred Super. I'atentanw.ilte, Cosiniasir. 81, D-8 Munich 81 7. clutch control system according to one of claims 1 to 6, characterized in that the spring (15) of the clutch and the elastic element (26; 27; 29; 32; 36) in the course of the movement of the clutch actuating element can be deformed in parallel at the same time.