KR20190013776A - Clutch system comprising an actuating device for a friction clutch and an actuating device - Google Patents

Abstract

The present invention relates to a sleeve 37, 38 having annular rims 35, 36, which are arranged around the axis of rotation d and apply a load to the actuating elements of one or more friction clutches 200, Wow; (21, 22) which are arranged substantially perpendicular to the rotation axis (d) and that are engaged with the annular rims (35, 36) in a fork shape in the radial direction and resiliently received in the base plate (2) A lever actuator (3, 4) having an arm portion A supporting portion having a lever point displaceable in the radial direction by the actuators 5 and 6 and the spindle driving portions 9 and 10 and displaceable in the radial direction between the base plate 2 and the levers 21 and 22 (1) for one or more friction clutches (200, 201) arranged around a rotational axis (d) with a transverse member (15, 16), and a clutch system comprising such an actuating device. One or more friction clutches 200 and 201 are operated in a retracted state and in order to improve the operating device 1 for more uniform operation of the one or more friction clutches 200 and 201, The support portion is formed so as to be tilted flexibly with respect to the base plate (2).

Description

Clutch system comprising an actuating device for a friction clutch and an actuating device

The present invention provides a friction clutch comprising: a sleeve having a toroidal rim disposed around a rotating shaft and applying a load to an operating element of at least one friction clutch along an operating path; A lever actuator having a lever arranged substantially vertically with respect to the rotation axis, the lever being engaged with the annular rim in a fork shape in the radial direction and resiliently received in the base plate in the radial direction; And a transverse member displaceable in a radial direction by the actuator and the spindle drive unit and defining a support having a lever point displaceable radially between the base plate and the lever, Devices, and clutch devices including such actuating devices.

A general type of operating device is used to actuate a friction clutch that is rotatably arranged around the axis of rotation to control the torque to be transmitted through the friction clutch. For this purpose, for example in DE 10 2004 009 832 A1, a so-called lever actuator with a lever arranged substantially vertically is known, in which case the lever has its own lever tip ) Is used to displace the sleeve arranged about the axis of rotation axially along the working path, thereby actuating the actuating element, for example a leaf spring or lever spring of a friction clutch to be actuated in a dry manner, Activate the operating piston of the clutch. At this time, the actuating element forms a frictional engagement under the pre-stress of the inlet-side friction surface and the outlet-side friction surface of the friction clutch, in which case the pre-stress is controlled by an axial action in the working element in the radial direction, As the clutch is formed, the frictional engagement portion is formed or disengaged while forming a temporary sliding step.

The levers of the lever actuators are resiliently connected to the base plate in a radially spaced relationship with respect to the lever tips. Between the lever and the base plate is arranged a radially displaceable cross member which rolls on the rolling surface of the lever and base plate by means of rollers and forms a lever point with respect to the lever. In this case, the lever tip of the lever is displaced by the actuator by displacing the transverse member by an actuator in the radial direction, for example by a motor having a spindle drive part or a hydraulic cylinder. DE 10 2008 026 944 A1 discloses a structurally formed embodiment of an actuating device with lever actuators in which the friction clutch is pressurized through a sleeve for the actuation of the lever, It is opened or closed by pressure. DE 10 2010 025 408 A1 also discloses an actuating device with a lever actuator which pulls the friction clutch by applying a tension to a friction clutch which is opened in the unloaded state.

An object of the present invention is to improve an actuation device for at least one friction clutch. In particular, an object of the present invention is to propose an actuating device for one or more friction clutches, which enables improved operation of one or more friction clutches. It is also an object of the present invention to propose a clutch system with one or more friction clutches with improved operating devices.

The above problem is solved by the objects of Claim 1, Claim 9 and Claim 10. [ Claims dependent on claim 1 reproduce the preferred embodiments of the subject matter of claim 1.

The proposed actuating device is used to actuate one or more friction clutches arranged around the rotational axis. The one or more friction clutches may be operated either dry or wet. The one or more friction clutches may be closed or open. The actuation of the at least one friction clutch is effected along the operating path by means of the actuating elements of the at least one friction clutch. In the case of a frictionally actuated friction clutch, the actuating element may be formed as a leaf spring, a lever spring or the like. A wet friction clutch comprises a plurality of multi-discs formed in alternating layers and fixed in a rotationally coupled manner at the inlet side and the outlet side, the multi-discs comprising actuating elements, for example a piston sheet ) Or the like to the final stopper. In this case, each of the actuating elements is provided with an annular rim, and is axially loaded in a state of being disengaged from the sleeve arranged around the rotational axis in a rotational manner.

The actuating device comprises a lever actuator arranged substantially perpendicular to the rotational axis for actuation of the at least one friction clutch, the lever actuator being provided with a lever, the lever tip of the lever being forked in the radial direction And is resiliently received in the base plate in the radial outside. For example, the elastic accommodation of the lever in the base plate can be made by two spring elements arranged at regular intervals, for example a helical compression spring, with respect to the radial extension of the lever.

A radially displaceable transverse member is provided to form a lever point radially displaceable between a resilient receiving portion of the lever on the base plate and the lever tip. The transverse member is actuated by an actuator fixed to the base plate or otherwise fixed. For example, the actuator may be formed as an electric motor with a spindle drive, in which case a radial motion is generated which displaces the transverse member from the rotor motion of the motor by the spindle drive. For example, a spindle nut received on a spindle thread of a spindle provided to rotate integrally and axially displaceably can be provided or formed inside the rotor of the motor, in which case the spindle is firmly connected to the transverse member .

 The lateral member is radially displaced from the radially outside to the radially inside, thereby changing the lever point of the lever. From this it can be seen that when the bearing surfaces of the levers for the transverse members are correspondingly profiled and the spring elements are arranged correspondingly between the lever and the base plate, Resulting in a pulling action of the lever tip. In this case, the profiling and the spring elements can be matched to the force relationship in the friction clutch so that the operation of the friction clutch can be effected substantially without force.

Due to the manufacturing offset of the actuating device and the friction clutch, the axial offset between the crankshaft driving the friction clutch and the transmission input shaft and / or the like of the subsequent transmission, the inclination of the lever relative to the friction clutch May appear. This allows, for example, the lever tip of the lever to operate the annular rim of the sleeve non-uniformly. Such unequal behavior may again cause so-called NVH-loads (noise, vibration, roughness). Therefore, it is proposed to form the supporting portion of the lever with respect to the base plate so as to be inclined flexibly. It is also desirable to form the frictional clutch as an open frictional clutch which is pulled through a transverse member on the base plate in conjunction with a flexibly tilting support of the lever, preferably as a closed frictional clutch in the absence of a load appear. In this case, the lever is pulled to its correct position during clutch operation using its lever tip - with the sleeve arranged non-uniformly, depending on the situation. In this way, the height difference due to the tolerance of the lever tip is also compensated.

The flexibly inclined supports can be formed on the base plate and on the lever along the rolling surface by a single roller, unlike the two spaced-apart rollers of the prior art. This means that only one roller rolls on the rolling surface of the lever and another roller rolls on the rolling surface of the base plate. In this case, the rollers are preferably arranged in the same plane so as to avoid the rollover moment. The rollers can each be rotated by one axis in the transverse member, for example in the pocket of the transverse member, preferably on both sides, for example by a rolling bearing or a sliding bearing. As long as sufficient tilt capability is maintained, the single roller may also mean a pair of rollers with roller halves arranged at a small distance from one another. Subsequently, it has also proven desirable to install the rollers at the same height in the radial direction in the transverse member.

According to a preferred embodiment of the actuating device, the rolling surfaces can be arranged on the facing surfaces of the base plate and the lever. This arrangement means that the rollers are arranged adjacent to each other in the axial direction at a narrow gap with respect to each other in the axial direction. In this case, the base plate may be arranged axially between one or more friction clutches and the lever.

In an alternative embodiment of the actuating device, the rolling surfaces can be arranged on mutually distant surfaces of the base plate and the lever. In this case, the transverse member may have sections penetrating the base plate and lever at corresponding recesses, for example a radial extending longitudinal slot, each of which has a single roller accommodated therein . In such embodiments, the lever may be arranged axially between the base plate and the at least one friction clutch.

The actuating device may comprise two lever actuators and corresponding sleeves, such as actuating sleeves, in which case the lever actuators are arranged displaced about a rotational axis, and the sleeves are arranged in an axially spaced annular rim And the levers are formed axially displaced relative to each other with lever tips for accessing the annular rim in a state of being displaced in the axial direction. At this time, the lever actuators actuate one of the two friction clutches of the double clutch, respectively, for example, for a dual clutch transmission having a transmission input shaft coaxially arranged with respect to each other. Alternatively, the double clutch may be provided with a starter clutch and an auxiliary output clutch.

The base plate can be received in the transmission housing of the transmission. In this case, the subassembly of the operating device including the sleeve (s) can be secured to the transmission. Alternatively, the base plate may be arranged on the engine side or at the clutch bell. In particular, in the case of a double-clutch with one wet-actuated friction clutch or two wet-actuated friction clutches, the actuating device comprises a friction clutch or double clutch and a transmission housing with a cavity oil chamber Can be integrated. In this case, the actuator may be integrally flanged to the transmission housing from the outside through the corresponding opening, or may be received within the oil chamber. The base plate may be formed as a casting portion, a forged portion, or a sheet metal portion. The proposed clutch system comprises one or more friction clutches, preferably wet-actuated, operated in a pulled state, and an actuation device as proposed for operating such friction clutches, in which case one or more friction clutches The device forms one structural unit. This allows the clutch system to be inspected, calibrated and / or parameterized substantially autonomously, for example, before mounting, after final assembly, during storage, during maintenance or repair operations and / or the like. In this case, the data necessary for the operation of the clutch system, in particular the calibration data, the parametrization data, the error memory entries and / or similar data, may be stored in the field electronics of the actuator or actuators, Can be adapted. Further, when the lever and the at least one friction clutch are accommodated on the same base plate, a series of tolerances can be improved.

One preferred embodiment of the proposed clutch system comprises two friction clutches which are preferably operated as wet and formed as a double clutch and have an actuating device as proposed. In this case, the two lever actuators, each actuating one friction clutch, are arranged displaced by a predetermined offset angle of 90 [deg.] To 120 [deg.], Especially 110 [deg.] To 115 [ In this way, the actuating device can be inserted in a circumferential gap between the transmission eyes of the transmission output shaft of the dual clutch transmission in a space-saving manner and in axial overlap with the circumferential gap .

The present invention will be described in more detail with reference to the embodiments shown in Figs.
Figure 1 shows a view of a transmission with an actuating device with two lever actuators,
Figure 2 shows a cross section of the clutch system with the actuating device of Figure 1 taken along section line AA in Figure 1,
Figure 3 shows a view corresponding to the view of Figure 1 with a modified operating device for the operating device of Figure 1,
Fig. 4 shows a section of the actuating device of Fig. 3 corresponding to the view of Fig. 2 cut along the cutting line BB.

Figures 1 and 2 show a transmission 100 having a transmission input shaft 111, 112 formed as a double clutch transmission and coaxially arranged around the axis of rotation d with an actuating device 1, (FIG. 2) of an actuating device 1 for actuating two friction clutches 200, 201 which form one double clutch and which are not shown in detail, or in cross-section (FIG. The operating device 1 comprises a base plate 2, 2 ', in which case the upper part of figure 2 shows a base plate 2 made from a cast part, the lower part of figure 2, in an alternative example, ≪ / RTI > shown in Fig. In the following, the base plates 2, 2 'are described as a base plate 2 in unison and in a summary of the two base plates. On the base plate 2 the two lever actuators 3 and 4 are arranged with a deviation angle a of 110 to 115 relative to one another so that the transmission output shafts 115 and 116 of the transmission 100 The two transmission idles 113 and 114, respectively.

The lever actuators 3 and 4 are accommodated in the base plate 2 and include actuators 5 and 6 each having the electric motors 7 and 8 and the spindle drivers 9 and 10. At this time, the rotors 11 and 12 are used as the spindle nuts of the spindle drive units 9 and 10, and the spindles 13 and 14 are accommodated in the electric motors 7 and 8 so as to rotate integrally and displace axially And is connected to the lateral members 15, 16 at the end side. The transverse members 15, 16 are provided with rollers 17, 18, 19, 20, respectively.

Each of the lever actuators 3 and 4 has levers 21 and 22 which are resiliently received by the spring elements 23 and 24 radially outwardly on the base plate 2, The spring elements are formed as helical compression springs (25, 26) arranged at circumferentially spaced intervals. The helical compression springs are housed in ports 27 and 28 connected to the base plate 2. In this case the levers 21 and 22 are connected to the rear holders 29 and 30 connected to the base plate 2 and the helical compression springs 25, and 26, respectively. The levers 21 and 22 are provided with lever tips 31 and 32 formed in a fork shape in the radial direction and having elevated action surfaces 33 and 34 remote from the friction clutches 200 and 201, The working surface is in close contact with the annular rims 35 and 36 of the sleeves 37 and 38 arranged concentrically around the rotation axis d.

The transverse members 15, 16 are engaged between the base plate 2 and the levers 21, 22, respectively. The rollers 17 and 18 roll on the rolling surfaces 39 and 40 of the levers 21 and 22 and the rollers 19 and 20 roll on the rolling surfaces 41 and 42 of the base plate 2. The rolling surfaces 39 and 40 have axial profile rings along their radial extensions to, for example, match the force / distance-characteristics to the operating force of the friction clutches 200 and 201. The transverse members 15,16 having their own rollers 17,18,19,20 form a lever point which can be displaced radially between the levers 21,22 and the base plate 2, In the case of radial displacement, one transverse member 15, 16 of each of the levers 21, 22 is tilted about the lever point, and the lever tips 31, 32 are displaced by the transverse members 15, Apply friction to the individual sleeves 37 and 38 radially inward against the action of the spring elements 23 and 24 when the frictional clutches 200 and 201 are formed as closed friction clutches or as open frictional clutches Thereby closing or opening the friction clutch. When the transverse members 15, 16 are displaced radially inversely, the friction clutches 200, 201 are automatically opened or closed again in the opposite manner, preferably automatically. Depending on the position of the transverse members 15, 16, the sliding state of the friction clutches 200, 201 can be maintained or adjusted as specified.

Only one roller 17,18 rolling on only one of the rolling surfaces 39,40 of the levers 21,22 and a single roller 17,18 on each of the rolling surfaces 41,42 of the base plate 2 The lever tips 31 and 32 of the levers 21 and 22 can be uniformly adhered to the annular rims 35 and 36 by the formation of the single roller 19 and 20 rolling. It is clear that the rollers 17, 18, 19 and 20 can be formed as roller elements which are arranged side by side in the axial direction and roll on only one rolling surface, for example from roller elements composed of several parts. In this case, the tolerances of the components, for example the tolerances of the lever tips 31 and 32 of the levers 21 and 22, the axial direction between the crankshaft of the internal combustion engine and the transmission input shafts 111 and 112, Due to the displacement, for example, the two spaced apart spring elements 23, 24 are operated at different intensities, so that the levers 21, 22 can be tilted about their radial longitudinal axis. In this way, a situation in which one side of the annular rim 35, 36 is actuated and subsequently a situation in which one side of the sleeve 37, 38 and of the actuating element of the friction clutch 200, Can be avoided or at least reduced.

Figs. 3 and 4 show an embodiment of a modified operating device 1a with respect to the operating device 1 in the drawings of Figs. 1 and 2. Fig. Unlike the actuating device 1 in which the base plate 2 and the two rolling surfaces 39, 41 or 40 of the levers 21 and 22 face each other, the base plate 2a and the levers 21a, The rolling surfaces 39a and 41a or 40a and 42a of the base plates 2a and 22a are arranged on the far side of the base plate 2a and the levers 21a and 22a. In this case, the transverse members 15a and 16a are held between the levers 21a and 22a and the base plate 2a and have respective axially extended sections 43a and 44a, Roller elements 48a, 49a (19a, 19a), which pass through corresponding longitudinal slots (45a, 46a, 47a) in the plate 2a and in the levers 21a, 22a and form rollers 17a, , 50a.

1: Operation device
1a: Operation device
2: Base plate
2 ': Base plate
2a: base plate
3: Lever actuator
4: Lever actuator
5: Actuator
6: Actuator
7: Electric motor
8: Electric motor
9:
10: spindle driving part
11: Rotor
12: Rotor
13: Spindle
14: Spindle
15: transverse member
15a:
16: transverse member
16a:
17: Roller
17a: Roller
18: Rollers
18a: Rollers
19: Rollers
19a: Rollers
20: Rollers
21: Lever
21a: Lever
22: Lever
22a: Lever
23: spring element
24: spring element
25: helical compression spring
26: helical compression spring
27: Port
28: Port
29: rear holder
30: rear holder
31: Lever tip
32: Lever tip
33: working surface
34: working face
35: Fantastic limb
36: Fantastic limb
37: Sleeve
38: Sleeve
39: Rolling face
39a: rolling face
40: rolling face
40a: rolling face
41: Rolling face
41a: rolling face
42: Rolling face
42a: rolling face
43a: section
44a: section
45a: longitudinal slot
46a: longitudinal slot
47a: longitudinal slot
48a: Rolling element
49a: Rolling element
50a: Rolling element
100: transmission
111: transmission input shaft
112: transmission input shaft
113: transmission eye
114: transmission eye
115: transmission output shaft
116: transmission output shaft
200: friction clutch
201: Friction clutch
d:
α: deviation angle

Claims (10)

An actuating device (1, 1a) for at least one friction clutch (200, 201) arranged around a rotational axis (d)
Sleeves (37, 38) having a toroidal rim (35, 36) disposed around the axis of rotation (d) and applying a load to the operating element of the at least one friction clutch (200, 201) along the working path; Are arranged substantially vertically with respect to the rotational axis d and engage with the annular rims 35 and 36 in a fork shape in the radial direction and are elastically accommodated in the base plates 2, 2a and 2 ' A lever actuator (3, 4) having levers (21, 21a, 22, 22a); Is displaced radially by the actuators 5 and 6 and the spindle drives 9 and 10 and is displaced in the radial direction between the base plates 2, 2a and 2 'and the levers 21, 21a, 22 and 22a And a transverse member (15, 15a, 16, 16a) forming a support having a possible lever point,
Characterized in that at least one friction clutch is operated in a pulled state and the supports of the levers (21, 21a, 22, 22a) are formed so as to flexibly tilt with respect to the base plates (2, 2a, 2 ' (1, 1a). 2. The roll of claim 1, wherein the flexibly tilted supports are formed by a single roller (17,17a, 18,18a, 19,19a, 20) on each of the rolling surfaces (39,39a, 40,40a, 41,41a, Are formed in the base plates (2, 2a, 2 ') and in the levers (21, 21a, 22, 22a) A friction clutch according to claim 2, characterized in that the rolling surfaces (39, 40, 41, 42) are arranged on mutually facing surfaces of the base plates (2, 2 ' Operating device (1). The operating device for a friction clutch according to claim 3, characterized in that the base plates (2, 2 ') are arranged axially between one or more friction clutches (200, 201) and levers (21, 22) One). The operating device for friction clutches according to claim 2, characterized in that the rolling surfaces (39a, 40a, 41a, 42a) are arranged on mutually distant surfaces of the base plate (2a) and the levers (21a, 22a) 1a). 5. A device according to claim 4, characterized in that the transverse members (15a, 16a) are arranged in the corresponding longitudinal slots (45a, 46a, 47a) of the base plate (2a) and the levers (21a, Characterized in that each of the sections (43a, 44a) has a section (43a, 44a) penetrating through each of the sections (43a, 44a) . A friction clutch according to claim 5 or 6, characterized in that the levers (21a, 22a) are arranged axially between the base plate (2a) and one or more friction clutches (200, 201) (1a). 8. A friction clutch actuating device (1, 2 ') according to any one of claims 1 to 7, characterized in that the base plates (2, 2a, 2') are formed as casting parts, forgings, 1a). (1, 1a) according to any one of the claims 1 to 7 for actuating one or more friction clutches (200, 201) which are operated in a pulled state, CLAIMS 1. A clutch system comprising:
Wherein the at least one friction clutch (200, 201) and the actuating device (1, 1a) form one structural unit. A clutch system (200, 201) comprising two friction clutches (200, 201) with an actuating device (1, 1a) according to one of the claims 1 to 8, preferably operated as a wet clutch and formed as a double clutch As a result,
The two lever actuators 3 and 4 for actuating one friction clutch 200 and 201 are displaced by a predetermined deviation angle alpha of 90 to 120 degrees about the rotational axis d The clutch system being arranged.

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