JPS60241526A - Abrasion compensation apparatus of connection apparatus, forexample, drive part of clutch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Applicability] The present invention generally relates to a coupling device of the type that tightens a friction disc between a flywheel and a pressure plate under the action of a diaphragm-shaped spring (diaphragm spring). In particular, the present invention relates to a device for compensating for wear of a clutch drive unit or a wear compensation device.

The clutch is engaged under the action of a diaphragm spring, which is supported on a cover connected to the flywheel and exerts a tightening force on the pressure plate.

The clutch is adapted to be moved from an engaged or clutch position to a disengaged or clutch disengaged position via a counteracting part that acts on a movable part or a movable mechanism formed by a pressure plate and a diaphragm spring.

[Conventional technology]

This counteracting element generally includes a translationally movable hair ring or release bearing that acts on the center of the diaphragm spring in order to eliminate the elastic linear action of the diaphragm spring on the pressure plate at the desired time.

In addition to this release hair ring, the counter operation part is -I
I is provided with a dynamic chain consisting of a clutch fork, lever, clevis link, etc., which cooperates with a positioning drive, for example a small electric motor, and an elastic device for moderating or regulating the actuating force. This elastic device makes it possible to utilize reduced forces on the operating means.

The counteracting element is generally mounted with a stroke consisting of a truly useful part and protruding parts on either side thereof. The ends of the truly useful portion of the stroke correspond to the engaged and disengaged states of the clutch.

Friction discs (commonly referred to as clutch discs) are periodically replaced as they wear out.

[Problem that the invention seeks to solve]

The object of the present invention is to eliminate the need for periodic replacement.
The object of the invention is to provide a wear compensation device for a drive part of a coupling device, such as a clutch, of the type mentioned at the beginning of the description.

[Means for solving problems]

According to the present invention, a connecting means consisting of two parts (connecting element) is arranged between the positioning drive device and the elastic means and the counter operation part, and the first part (first connecting element) of the connecting means is provided. is combined with the positioning drive device and the elastic means, and the second part (second connecting element) is combined with the counter operation part, respectively,
The first portion and the second portion are typically ratcheted to each other and are unlatched from each other beyond a predetermined position in the travel of the first portion.

With this arrangement, the presence of the adjusting elastic means not only makes use of an electric drive with low power, but also ensures perfect operation, independent of the state of wear, by a very simple mechanism.

According to a preferred embodiment, the device for compensating the wear of the coupling device, for example the drive part of the clutch, has a particularly strong construction, is long-lasting and has a precise action.

1! ! The rubbing compensation device is constructed as follows.

That is, the first part combined with the positioning drive device and the adjusting elastic means includes a sector gear, and the sector gear is rotatably mounted around the operating axis of the counter-operating part, Said second part, which is engaged with a pinion device cooperating both with and adjusting elastic means and which is associated with the counteractuating part, is adapted to include a lever device connected to said actuating shaft.

According to this configuration, the overall structure is simple and strong, the stroke of the sector gear is minimized, and the wear-compensating device occupies the minimum space inside the operating part and under the best conditions. be assembled into.

According to another feature of the invention, the lever device has a first lever and a second lever, the second lever cooperates with the sector gear by means of a latching means, and the second lever is integrated with the actuating shaft; The first lever and the second lever are connected to each other by two connecting shafts, one with no play and the other with play, so that the first lever is connected to the second lever and has a large range of movement. ing.

Due to the fact that the wear-compensating device with latching means is connected to the second lever, which has an amplified movement, the action of the wear-compensating device is particularly precise and, due to its large dimensions, Strong structural elements can compensate for slight wear and tear.

According to a preferred embodiment of the invention, the ratchet means include a pawl which is rotatably mounted on the sector gear and cooperates with teeth formed on the lever device.

According to another preferred embodiment of the invention, the ratchet means includes a trochanter mounted in a cage mounted rotatably about an axis of rotation, the ratchet means comprising a lever device and a sector gear. The respective supporting surfaces of and the clamping and clamping work together in a releasing relationship.

According to a further preferred embodiment of the invention, the first coupling element of the coupling means meshes with two pinions, one pinion being driven by the positioning drive and the other pinion being associated with the adjusting elastic means. and a second connecting element of the connecting means is slidably engaged within the rack.

Preferably, the pawl is pivotally mounted on the first connecting element of the connecting means and cooperates with a tooth formed on the second connecting element of the connecting means.

According to another preferred embodiment of the invention, the return spring is
tending to maintain the pawl in mesh with the toothing of the second connecting element of the connecting means, the pawl cooperating in an abutting manner with the fixed support member, disengaging from said toothing and automatically compensating for wear. It's starting to look like this.

The features and advantages of the present invention will become more apparent from the following description with reference to the accompanying drawings.

(Embodiment) FIGS. 1 to 7 illustrate an example in which the present invention is applied particularly to operating a diaphragm spring type clutch of an automobile.

The clutch comprises a cover 10 adapted to be fixed to the flywheel 11 of the motor vehicle engine. The flywheel 11 forms a reaction plate. The clutch 4 also has a friction disc or clutch disc 12 which is connected to a first shaft 13 of the motor vehicle transmission. The disk 12 is tightened under the elastic force of a diaphragm spring 15 between a pressure plate 14 connected to a cover 10 and a flywheel 11.

The diaphragm spring 15 is supported on the cover 10 at a fulcrum 16 and is provided with finger sections 17 in the central region, which are shown in FIG. From the clutch engaged state, the release hair ring 18 pushes the diaphragm spring 15 to the left in FIG. When moving, it is pushed to the left by the thalasso relief hair ring 18.

The clutch thus changes its state as a function of the position of the movable part formed by the pressure plate 14 and the diaphragm spring 15. The movable part is movable in both directions according to a stroke defined between a first extreme position, in which the clutch is engaged or engaged, and a second extreme position, in which the clutch is disengaged or disengaged.

The diaphragm spring 15 forms an elastic device for returning the movable part towards the first extreme position.

The release hair ring 18 forms part of a counter-operating section that is combined with the movable section, and this operating section is provided with an operating shaft 40 that is integral with a clutch fork 41. The counter-operating part is mounted movably according to a stroke having positions corresponding individually to the two positions of the movable part, and is for moving the movable part from the first extreme position to the second extreme position. It is designed to act against this.

A positioning drive, for example a small electric motor 41!20, is combined with the operating part (which, as mentioned above, includes the release ring 18, the actuating shaft 40 and the clutch fork 41), and which is connected to the movable part (the pressure plate 14 and the clutch fork 41). (including the diaphragm spring 15), it acts to fix all instantaneous positions of the operating part.

The electric motor 20 is adapted to move the operating part according to its own stroke so as to cause a corresponding movement of the movable part according to its stroke. Spring 21 (second
(see figure) is also combined with the operation section. In addition to the release bearing 18, this operating section also includes a lever 19 combined with an operating shaft 40.

The lever 19 connects the positioning drive device and the elastic device with the first
and a second connecting element 26,27.

The first connecting element 26 is connected to the positioning drive and the elastic device, and the second connecting element 27 is connected to the lever 19.

The first and second connecting elements 26,27 are ratchet mechanisms 51
This ratchet mechanism is normally in a latched state, but in particular in order to be able to compensate for wear on the clutch disc 12, the first coupling element 26
During the stroke, the clutch is disengaged from a predetermined position near the clutch position.

The first coupling element 26 includes a sector gear 42 having teeth 43 and pivoted 44 for free rotation about an actuation axis 40 .

The sector gear 42 meshes with a pinion 45 through teeth 43. The pinion 45 is integrated with another pinion 46, and the pinion 46 meshes with a worm 47 driven by the electric motor 20.
7. The pinions 46 and 45 form a reduction gear system; 6. The spring 21, which is an elastic device, is moored to the pinion 46.
8 has been done. Therefore, pinion 45.46 is in position 'I
A pinion device is formed which cooperates not only with the electric motor 20, which is the l'G drive device, but also with the spring 2I, which is the elastic device.

The second coupling element 27 also comprises a lever device 19 connected to the actuating shaft 40 .

The lever device 19, as shown particularly well in FIG. 2.3,
It includes a second lever 49 and a second lever 50.

The lever 49 cooperates with the sector gear 42 by means of a ratchet mechanism 51. The second lever 5o is integrated with the operating shaft 40 (Fig. 2.3).

The levers 49.50 are connected to each other by two articulating shafts 52.53, the articulating shaft 52 having no play and the articulating shaft 53 having play, so that the movement of the first lever 49 is caused by the movement of the second lever 50. It has a wider range than the motion of The play of the connecting shaft 53 is approximately radial play, as shown in FIG.

In the example shown in Figure 2.3, the ratchet) 41 structure 51 is
A stop 54 with a pivot 55 is provided on the sector gear 42.

The catch 54 cooperates with a toothing 56 formed on the lever 49 of the lever device 19. The return spring 57 engages the pawl 54 with the teeth 56 of the lever device 19! I hold it in vain. The catch 54 cooperates with the fixed support member 58 by abutting against each other, and prevents it from separating from the tooth portion 56 at the clutch engagement position.
Figure) Automatically compensates for wear.

Next, with reference to FIGS. 1 to 4, the operation will be explained.
If the war 1.47 of the electric motor 20 is present in the position shown in Figure), the thalassochi fork 41 of the counter operation part
does not act on the diaphragm spring 15 in any way.

In this position, the spring 21 is effectively inactive and the clutch is engaged with an engagement force which is the spring force of the diaphragm spring 15.

Further, in this position, the pawl 54 is pushed up by the fixed support member 58, so that wear is compensated for.

FIG. 4 shows the clutch when the clutch disc 12 is in a tightly engaged state, and FIG. 6 shows the clutch when the clutch disc I2 is in a worn out state. .

To disengage the clutch, the electric motor 20 is rotated in a direction corresponding to the transition from the position shown in FIG. 4 to the position shown in FIG. The pawl 54 separates from the fixed support member 58, and the opposing operating portion overcomes the elasticity of the diaphragm spring 15, disengaging the clutch and freeing the clutch disc 12 (Fig. 5.7). 7 shows this engaged position when the clutch disc 12 is new, and FIG. 7 shows the engaged position when the clutch disc 12 is worn out. The spring 21 operates during this disengagement operation according to the law of decreasing operating force.

Re-engaging the clutch is just as easy, but in the opposite direction.

As will be appreciated, pawl 54 automatically compensates for wear on clutch disc 12. Lever device 19 is 2
It has two levers 49, 50, which are connected to each other by an articulation shaft 52 without play and an articulation shaft 53 with radial play. With the configuration shown in FIGS. 1-7, the angular movement of the toothing 56 is greatly amplified compared to the angular movement of the actuating shaft 40. Therefore, by selecting the dimensions of the toothings 56 to relatively large values, a strong structure and reliable operation are achieved, without losing the advantage of very fine friction compensation.

The embodiment shown in FIG. 8.9 is similar to the embodiment shown in FIGS. cage or guy 1
61 includes a single-digit trochanter 60 which is clamped between and released from the lever device 19 and the supporting surfaces 63, 64 of the sector gear 42. Let's move together like this.

The support surface 63 of the gear 42 forms a tightening slope, and the support surface 64 of the lever device 19 is cylindrical and coaxial with the rotation axis 62 of the cage 61.

The cage 61 cooperates with the clamping/releasing fixing support surface 58, as shown in FIG.

The lever device 19 according to the embodiment of FIG.
Similar to the embodiment shown in the figures, it has two levers 49,50 connected via a free-play articulation shaft 52 and a play-free articulation shaft 53.

The play-free connecting shaft 52 is arranged coaxially with the rotation shaft 62 of the cage 6. The lever 49 has a cylindrical clamping support surface 64, and the lever 50 is integral with the actuating shaft 40, as shown in FIGS. 1-7.

The operation of this embodiment is similar to the embodiment of FIGS. 1-7. Due to the fact that the lever device 19 has the shape of a lever 49,50 and the ratchet device W51 has a trochanter 60, the cage 61 and the bearing surface 63,64, as described above, undergo an amplified angular movement and a rigid It is preferable because it can have a large size, which is advantageous in terms of efficiency and efficiency.

The configuration of the embodiment shown in Figure 10.11 is similar to that described above with respect to Figure 8.9. Ratchet gear? 1
f51, as before, consists of a trochanter 60, a cage 61 and a bearing surface 63,64, but the lever device 19 has only a single lever 70, which is connected to the ramp 63 of the sector gear 42. They work together via a trochanter 60 and are integrated with the operating shaft 40.

In this case, the rotation shaft 62 of the cage 6 is the operating shaft 40.
is on the same axis as

The operation of this embodiment is the same as described above.

In FIG. 12, the thalasso release bearing 18 forms, together with the lever device 19, a counter operating section that is fitted to the movable section (the pressure plate 14 and the diaphragm spring 15).

This counter-operating part is mounted movably according to strokes that correspond individually to the two positions of the movable part.

The counteracting element is preferably mechanical in nature, but may also be of any other nature.

The counter-actuating part thus acts on the movable part in order to shift the movable part from the first extreme position to the second extreme position or vice versa, from the second extreme position to the first extreme position. It looks like this.

A positioning drive, for example a small electric motor 20, is connected to the counter-operating part and serves to fix all instantaneous positions of the counter-actuating part, independently of the diaphragm spring 15, which is the elastic element of the movable part. .

The electric motor 20 is adapted to move the opposing operating portion according to its stroke so as to move the movable portion correspondingly according to its stroke. A spring 21, which is a device for relaxing or adjusting the operating force, is also associated with the counteractuating element. The lever device I9, which is an element other than the release bearing 18 of this counteracting part, is pivoted around a fixed pivot shaft 23, and is supported by a spring 1, which is a permanent support spring.
It is combined with 9A.

The lever device 19 cooperates with a release bearing 18 at the tip 24. The other end 25 of the lever device 19 is connected to the first
The electric motor 20 is connected by the connecting element 26 and the second connecting element 27.
and spring 21, respectively.

The first connecting element 26 connects the electric motor 20 and the spring 21 to the second
The connecting elements 27 are each associated with a lever assembly W19.

The first and coupling elements 26 , 27 are normally latched 29 to each other in a ratcheted manner and are arranged at predetermined positions in the travel of the first coupling element 26 in order to automatically compensate for wear on the clutch disc 12 . , and are unhinged from each other.

More specifically, the first coupling element 26 has a rank which meshes with the two pinions 22A, 22B;
The pinion 228 is a positioning drive device such as a small electric motor 2.
The other pinion 22B is connected to a spring 21, which is an elastic device. The second connecting element 27 is slidably received 31 within the rank 26 .

The pawl 32 is pivotally mounted 33 on the rack 26 and cooperates 29 with teeth 34 formed on the second connecting element 27.

A return spring 35 tends to keep the pawl 32 in mesh with the toothing 34, and a fixed support member in the form of a finger 36 provides a first stop to automatically compensate for clutch disc wear.
After the predetermined position of the travel of the connecting element 26, the pawl 32 is moved so that the pawl 32 disengages from the teeth 34.
work together with

The present invention can be implemented with various modifications other than the embodiments described above, and the specific configuration described above is merely an example of IP, and does not limit the present invention.

[Brief explanation of drawings]

Fig. 1 is a schematic layout diagram showing the entire clutch and its electric motor drive unit incorporating the wear compensation device according to the present invention, and Fig. 2 shows the clutch electric motor drive unit and the wear compensation device. FIG. 5 is a detailed view showing the clutch in an engaged position;
Fig. 3 is a cross-sectional view taken along the line ■-■ in Fig. 2, and Figs. 4 to 7 are detailed views similar to Fig. 2 shown in various operating positions and states. Figure 4 shows the engaged position of the new clutch, Figure 5 shows the disengaged position of the new clutch, Figure 6 shows the engaged position of the worn-out clutch, and Figure 7 shows the disengaged position of the worn-out clutch. FIG. 8 is an arrangement diagram similar to FIG. 2 showing a modification of the present invention in which the ratchet means is not tightened but is provided with a trochanter that cooperates with the slope, and FIG. 9 is an arrangement view IX-IX in FIG. 8. 10 is an arrangement view similar to FIG. 8 showing another modification of the present invention; FIG. 11 is a sectional view taken along line xI-xI in FIG. 10; FIG. 12 FIG. 1 is an arrangement diagram showing a driving part of a linear latch according to the present invention. Explanation of symbols 14...Pressure plate (movable mechanism), 15
...Diaphragm spring (movable mechanism), I8・
...Clara Lily's hair ring (counter control unit). 19
... Lever device (counter operation part), 20 ... Electric motor (
positioning drive device), 21... spring (elastic device), 2
6... First connecting element (part), 27... Second connecting element (part). F/G = 1Or--xr L+xr

Claims (1)

[Scope of Claims] 1) A device for compensating the wear of a drive part of a coupling device, for example a clutch, in which the state of the coupling device is movable in two directions according to a defined stroke between two extreme positions. (
14, 15), the mechanism is
A counter operation part (1B, 19) combined with the mechanism and having elastic means (15) for restoring toward the first extreme position of the two extreme positions,
) for moving said mechanism from its first extreme position to its second extreme position, or vice versa, from its second extreme position to its first extreme position; The opposing operation section is adapted to act on the mechanism as shown in FIG.
The positioning drive device (21) also works together with the elastic device (21) for adjusting the operating force.
o) and the elastic device (21) and the counter operation part (1B,
19), a coupling means consisting of two parts (26, 27) is arranged, the first part (26) connecting the positioning drive (20) and the elastic device (21) with the second part (26, 27). (2
7) are respectively combined with counter operation parts (18, 19), the first part (26) and the second part (27) are usually latched to each other in a ratchet manner, and the first part (
26) A wear compensating device characterized in that the wear compensating device is hooked and unlatched from each other in a ratchet type after a predetermined position in the stroke. 2) The first part (26) has a sector gear (42), the sector gear (42) is mounted so as to freely rotate around the actuating shaft (40) of the counter operation part, and the sector gear (42) is mounted to rotate freely around the operating shaft (40) of the counter operation part, and the sector gear (42) is mounted so as to rotate freely around the operating shaft (40) of the counter operation part. The second part (27) comprises a lever device f (19) connected to the actuating shaft (40), meshing with a pinion device (45, 46) cooperating with both the device (20) and the elastic device (21). A wear compensation device according to claim 1, characterized in that: 3) The lever device (19) is connected to the second lever (49) and the second lever device (19).
a lever (50), the third lever (49) is a radier;
The second lever (50) is integrated with the actuating shaft (40) by means (51) of the second lever (49) and the second lever (50). There are two connecting shafts, one without play (52) and one with play (52).
3), the second lever (4)
9. The wear compensation device according to claim 2, wherein the movement of the second lever (50) has a wider range of movement than the movement of the second lever (50). 4) The wear compensation device according to claim 3, wherein the play of the connecting shaft (53) having play is approximately radial play. 5) the ratchet means (51) includes a pawl (54);
The pawl (54) is rotatably mounted on the sector gear (42) and has teeth (56) formed on the lever device (19).
) Claims 1 to 4 characterized in that they cooperate with each other.
The wear compensation device according to any one of the above items. 6) The return spring (57) moves the pawl (54) to the lever device (
The wear compensation device according to claim 5, characterized in that the wear compensation device tends to be kept in mesh with the teeth (56) of the teeth (19). 7) A patent claim characterized in that the pawl (54) cooperates with the fixed support part +4 (58) in an abutting state so that it can be separated from the tooth part (56) and automatically compensate for wear. The wear compensation device according to item 6. 8) the ratchet means (51) includes a trochanter (60);
The trochanter (60) is mounted in a cage (61) that is rotatable around a rotating wheel (62), and is tightened with one tightening of 4J to the supporting surfaces (63, 64) of the lever device and sector gear. The wear compensation device according to claim 1, characterized in that the device cooperates in releasing the device. 9) The support surface of the sector gear forms a slope (63) when tightened,
The supporting surface of the lever device is the rotation shaft (62) of the cage (61).
9. The wear compensation device according to claim 8, wherein the wear compensation device is a cylindrical surface coaxial with the cylindrical surface. 10) Cage (61) is unfastened and fixed support surface (58)
10. Wear compensation device according to claim 9, characterized in that it cooperates with a wear compensation device. 11) The lever device (19) is connected to the second lever (49) and the second lever device (19).
It includes a lever (50), the first lever (49) is a trochanter (60).
) cooperates with the sector gear (42), and the second lever (50
) is integrated with the actuating shaft (40), and the first lever (49) and the second lever (50) are composed of two connecting shafts, namely, a connecting shaft without play (52) and a connecting shaft with play (53). The cage (61) is connected to the connecting shaft (5) with no play.
2) The wear compensation device according to any one of claims 8 to 10, wherein the wear compensation device is rotatably mounted around the wear compensation device. 12) The lever device (19) comprises a single lever (70), which is driven by a trochanter (60) into a sector gear (
42) and is integrated with the operating shaft (40), and the cage (
11. The wear compensation device according to claim 8, wherein the wear compensation device 61) is rotatably mounted around the operating shaft (40). 13) The first part of the coupling means includes a shaft (26) and two pinions (22A) meshing with the rank (26).
, 22B) is driven by a positioning drive, the elastic device f (21) is connected to the other pinion, and the second part of said connecting means is slidably engaged in said rack. A wear compensation device according to claim 1, characterized in that: 14) a pawl (32) is pivotally mounted on the first part of the coupling means and a toothing (34) formed in the second part of the coupling means;
14. Wear compensation device according to claim 13, characterized in that it cooperates with a wear compensation device. 15) The return spring (35) tends to hold the pawl (32) in mesh with the toothing (34) of the second part of the coupling means. wear compensation device. 16) The pawl (32) cooperates with the fixed support member (36) in an abutting state, thereby detaching from the tooth portion (34) and automatically compensating for wear. The wear compensation device according to scope 15.