CN116989095A

CN116989095A - Torque transmission device

Info

Publication number: CN116989095A
Application number: CN202210444750.2A
Authority: CN
Inventors: 肖荣亭
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2023-11-03

Abstract

The present invention relates to a torque transmitting device. The torque transmission device comprises a first rotating assembly, a second rotating assembly and a damping spring, wherein the first rotating assembly and the second rotating assembly can rotate relatively, and the damping spring is abutted between the first rotating assembly and the second rotating assembly along the rotating direction. Wherein the torque transfer device further comprises an output hub rotatable relative to the second rotating assembly and a clutch configured to selectively rotationally couple or decouple the second rotating assembly from the output hub. The torque transmitting device of the present invention facilitates a plurality of different modes of operation.

Description

Torque transmission device

Technical Field

The invention relates to the technical field of vehicles. In particular, the present invention relates to a torque transmitting device.

Background

Internal combustion engine drives are still used in the foreseeable future of motor vehicles. The basic requirements for torque transfer between the engine and the transmission are the same, no matter what type of transmission is chosen, i.e. torsional vibrations and rotational non-uniformities should be reduced while starting and transferring the average torque. Therefore, a torque transmitting device with a vibration damping function is generally provided between the engine and the transmission so as to absorb and dampen vibrations of torque output from the engine.

In current torque transmitting devices, there is typically only one pair of input and output terminals, and therefore only a single torque transmission path can be provided between the pair of input and output terminals. For some practical applications, however, particularly in hybrid vehicles, it is often desirable to provide a plurality of different torque transfer paths to output torque in order to accommodate different modes of operation.

Disclosure of Invention

The problem underlying the present invention is therefore to provide an improved torque transmission device.

The above technical problem is solved by a torque transmitting device according to the present invention. The torque transmission device comprises a first rotating assembly, a second rotating assembly and a damping spring, wherein the first rotating assembly and the second rotating assembly can rotate relatively, and the damping spring is abutted between the first rotating assembly and the second rotating assembly along the rotating direction. Wherein the torque transfer device further comprises an output hub rotatable relative to the second rotating assembly and a clutch configured to selectively rotationally couple or decouple the second rotating assembly from the output hub. The damper springs are capable of transmitting torque between two rotating assemblies such that the two rotating assemblies can act as two opposing torque transmitting ends (input or output) of a torque transmitting device. When the clutch is closed, torque may also be transferred between the first rotating assembly and the output hub, such that the output hub may act as another torque transfer end opposite the first rotating assembly and in parallel with the second rotating assembly. Such a torque transmitting device may provide two torque transfer paths and facilitate a variety of different modes of operation, particularly for use in a hybrid vehicle driveline.

According to a preferred embodiment of the invention, the clutch may be mounted axially between the second rotating assembly and the output hub. The clutch is axially movable between the second rotating assembly and the output hub to simultaneously engage both in an engaged state and to disengage from at least one of them in a disengaged state to control torque transfer between the second rotating assembly and the output hub.

According to another preferred embodiment of the invention, the output hub may be rotatably supported on the second rotating assembly by means of bearings. The bearing is radially supported between the second rotating assembly and the output hub and allows rotation of the output hub relative to the second rotating assembly.

According to another preferred embodiment of the present invention, the first rotating assembly may include a first flywheel, and the damper spring is abutted between the first flywheel and the second rotating assembly in the rotating direction. The first flywheel may act as the engine-side torque transfer end of the torque transfer device and may dampen torque oscillations by its own moment of inertia.

According to another preferred embodiment of the invention, the second rotating assembly may comprise an input flange and an output flange, the damper spring being in abutment between the first flywheel and the input flange in the direction of rotation, the input flange being in frictional contact with the output flange so as to transmit a limited torque, the clutch being mounted between the output flange and the output hub. The input flange and the output flange, which transmit limited torque through frictional contact, constitute a torque limiter. The torque limiter may limit the maximum torque that can be transmitted through the torque transmitting device, thereby protecting the various rotating components in the torque transmission path.

According to another preferred embodiment of the invention, the second rotating assembly may further comprise a second flywheel fixed to the output flange, the second flywheel being located axially on a side of the output flange remote from the first flywheel. The torque transmitting device is thus formed as a dual mass flywheel type torque transmitting device.

According to another preferred embodiment of the present invention, the first rotating assembly may include a side plate assembly, and the damper spring may be abutted between the side plate assembly and the second rotating assembly in the rotating direction. The side plate assembly may include two side plates that are axially spaced apart and fixedly connected together. The second rotating assembly may be located between the two side plates.

According to another preferred embodiment of the present invention, the torque transmitting device may further comprise an input plate in frictional contact with the side plate assembly to transmit limited torque. The input plate and side plate assemblies, which transfer limited torque through frictional contact, constitute a torque limiter. The torque limiter may limit the maximum torque that can be transmitted through the torque transmitting device, thereby protecting the various rotating components in the torque transmission path.

According to another preferred embodiment of the present invention, the second rotating assembly may include an output flange, the damper spring being abutted between the side plate assembly and the output flange in the rotating direction, and the clutch being mounted between the output flange and the output hub.

According to another preferred embodiment of the invention, the torque transmitting device further comprises an actuating mechanism for controlling the clutch. The actuating mechanism may be an electromagnetic actuator, a hydraulic actuator, a mechanical actuator, or the like, which may drive the clutch in motion, thereby controlling the engaged and disengaged state of the clutch.

Drawings

The invention is further described below with reference to the accompanying drawings. Like reference numerals in the drawings denote functionally identical elements. Wherein:

FIG. 1 illustrates a schematic diagram of a torque transmitting device according to a first embodiment of the present invention;

FIG. 2 illustrates a schematic diagram of a torque transmitting device according to a second embodiment of the present invention;

FIGS. 3a and 3b illustrate schematic diagrams of clutches of a torque transmitting device according to an embodiment of the present invention; and

FIG. 4 shows a schematic representation of a vehicle driveline having a torque transmitting device in accordance with an embodiment of the invention.

Detailed Description

Specific embodiments of a torque transmitting device according to the present invention will be described below with reference to the accompanying drawings. The following detailed description and the accompanying drawings are provided to illustrate the principles of the invention and not to limit the invention to the preferred embodiments described, the scope of which is defined by the claims.

According to an embodiment of the present invention, a torque transmitting device, in particular a torque transmitting device with a disc damper, is provided. Such torque transmitting devices may be employed in the drive train of a motor vehicle, which is typically disposed between the engine and the transmission, for absorbing and dampening vibrations and shocks in the torque from the engine. The torque transmitting device includes at least two rotating assemblies capable of relative rotation and a damper spring abutting between the two rotating assemblies in a rotational direction. These two rotating assemblies may be referred to as a first rotating assembly and a second rotating assembly, respectively, wherein the first rotating assembly is the assembly in the transmission path near the engine (front end) and the second rotating assembly is the assembly in the transmission path near the transmission (rear end). The specific construction of the torque transmitting device is explained below by means of specific embodiments, wherein fig. 1 and 2 show two different exemplary embodiments according to the invention, respectively.

Fig. 1 shows a first embodiment of a torque transmitting device according to the present invention. As shown in fig. 1, in the first embodiment, the first rotating assembly of the torque transmitting device 100 mainly includes a first flywheel 101. The first flywheel 101 is formed as a substantially disc-shaped member having a large moment of inertia, which is rotatable about a rotation axis substantially coinciding with the central axis. The first flywheel 101 is capable of damping torque vibrations by its own moment of inertia.

The damper spring 102 abuts between the first flywheel 101 and the second rotating assembly in the rotational direction. The torque transmitting device 100 may include one or more damper springs 102. The damper spring 102 may be a coil spring or other form of resilient member. When the torque transmitting device 100 includes a plurality of damper springs 102, the damper springs 102 are circumferentially spaced, particularly evenly spaced. The damper spring 102 is capable of transmitting torque between the first rotating assembly and the second rotating assembly, and damping torque vibration by elastic deformation of itself.

The second rotating assembly is located axially on the side of the first flywheel 101 remote from the engine. In the first embodiment, the second rotating assembly mainly comprises an output flange 103. The output flange 103 is formed as a substantially disc-shaped member which is arranged substantially coaxially with the first flywheel 101 and is rotatable relative to the first flywheel 101 about a rotation axis substantially coinciding with the central axis. Preferably, to support the output flange 103, the first rotating assembly may additionally comprise a support flange 106. The support flange 106 is fixed to the first flywheel 101. The output flange 103 is rotatably supported radially outward of the support flange 106 by a bearing 107. Furthermore, the bearing 107 may additionally provide axial support between the output flange 103 and the support flange 106.

In the present embodiment, a torque limiter is also provided in the torque transmitting device 100. The torque limiter is arranged between the output flange 103 and the damper spring 102. Specifically, the second rotating assembly also includes an input flange 104. The input flange 104 is also a substantially disk-shaped member arranged substantially coaxially with the first flywheel 101. The damper spring 102 abuts between the first flywheel 101 and the input flange 104. The input flange 104 axially abuts the output flange 103 (e.g., abuts an outer peripheral region of the output flange 103) so as to be in frictional contact with the output flange 103. The input flange 104 and the output flange 103 are capable of transmitting torque by friction, such that torque from the first flywheel 101 can be transmitted to the output flange 103 by the input flange 104, and torque from the output flange 103 can also be transmitted to the first flywheel 101 by the input flange 104. However, since there is an upper limit to the magnitude of the friction force, the amount of torque that can be transmitted between the input flange 104 and the output flange 103 is limited. The input flange 104 and the output flange 103 thus constitute a torque limiter. Preferably, in order to mount the input flange 104, as shown in fig. 1, the output flange 103 may be formed of a main body portion and a clamping portion fixed together, the clamping portion being mounted on one axial side of an outer peripheral region of the main body portion, and the input flange 104 may be axially clamped between the main body portion and the clamping portion of the output flange 103.

Alternatively, in an alternative embodiment to the first embodiment, a torque limiter may not be provided in the second rotating assembly. In this case, the second rotating assembly does not comprise an input flange 104, and the damper spring 102 is directly abutted between the first flywheel 101 and the output flange 103.

In the first embodiment shown in fig. 1, the second rotating assembly may also preferably include a second flywheel 105. The second flywheel 105 is fixed to the output flange 103 (e.g., by rivets, bolts or welding, etc., not shown). The second flywheel 105 is preferably located axially on the side of the output flange 103 remote from the first flywheel 101. The second flywheel 105 is also formed as a substantially disc-shaped member with a large moment of inertia, which is also arranged substantially coaxially with the first flywheel 101 and is rotatable with the output flange 103 in relation to the first flywheel 101. The second flywheel 105 is also capable of damping torque vibrations by its own moment of inertia. Thus, the torque transmitting device 100 is configured as a dual mass flywheel type torque transmitting device. Alternatively, the torque transmitting device may also include only the first flywheel 101 and not the second flywheel 105, thereby being configured as a single mass flywheel type torque transmitting device.

The torque transfer device 100 further includes an output hub 108 and a clutch 109. The output hub 108 is also formed in a substantially disc shape coaxially arranged with the first flywheel 101, the output flange 103. The output hub 108 is rotatable relative to the second rotating assembly, in particular the output flange 103, about an axis of rotation substantially coincident with the central axis. Preferably, the output hub 108 may be rotatably supported radially outward or radially inward of the output flange 103 by a bearing 110. The bearing 110 may also provide an axial stop function between the output flange 103 and the output hub 108.

The clutch 109 is mounted, in particular axially mounted, between the output hub 108 and the output flange 103 and is movable between the two. The clutch 109 is switchable between an engaged state and a disengaged state. In the engaged state, the clutch 109 is moved to a position that engages both the output hub 108 and the output flange 103 simultaneously, such that the output hub 108 and the output flange 103 are torsionally connected by the clutch 109, enabling torque to be transferred between the first rotating assembly and the output hub 108 via the second rotating assembly; in the disengaged state, the clutch 109 moves to a position disengaged from at least one of the output hub 108 and the output flange 103 such that no torque can be transmitted between the output hub 108 and the output flange 103. Fig. 3a and 3b illustrate two exemplary clutch 109 configurations. In fig. 3a, the clutch 109 is a pivot pin clutch, while in fig. 3b, the clutch 109 is a telescopic pin clutch. However, this is merely illustrative and the clutch 109 may be any other type of clutch known in the art.

To facilitate control of the movement of the clutch 109, the torque transmitting device 100 may also include an actuation mechanism 111. The actuation mechanism 111 may drive the clutch 109 to move, thereby controlling the position of the clutch 109. The actuation mechanism 111 may be, for example, an electromagnetic actuator, a hydraulic actuator, or other types of actuators known. The actuation mechanism 111 may be mounted, for example, on a housing (not shown) or other component of the torque transfer device 100 and disposed proximate to the clutch 109.

The output flange 103 and the output hub 108 may serve as two parallel torque transmitting ends of the torque transmitting device 100 opposite the first rotating assembly (in this embodiment, the first flywheel 101) to transmit torque for torsionally connecting with different transmission components or transmission paths. When clutch 109 is in an engaged state, both output flange 103 and output hub 108 can transmit torque to a transmission component or transmission path connected thereto; when the clutch 109 is in the disengaged state, only the output flange 103 is able to transmit torque to the transmission component or transmission path to which it is connected.

Fig. 2 shows a second embodiment of a torque transmitting device according to the invention. In a second embodiment, as shown in fig. 2, the first rotating assembly of the torque transmitting device 200 basically comprises a side plate assembly that includes two side plates 202 fixedly coupled together. Both side plates 202 are generally disc-shaped members that are axially spaced apart and fixedly connected to each other by means such as rivets or screws. The two side plates 202 are arranged substantially coaxially and are rotatable together about a rotation axis substantially coinciding with the central axis.

In a second embodiment, the second rotating component of the torque transmitting device 200 basically includes an output flange 204. The output flange 204 is formed as a generally disc-shaped member that is disposed substantially coaxially with the side plate assembly and is rotatable relative to the side plate assembly about an axis of rotation that is substantially coincident with the central axis. The damper springs 203 are abutted between the side plate assembly and the output flange 204 in the rotational direction. The structure, function and installation of the damper spring 203 in the second embodiment are substantially the same as those of the damper spring 102 in the first embodiment, and will not be described here.

The output flange 204 is axially located between the two side plates 202. Preferably, to axially position the output flange 204 relative to the side plate assembly, the torque transfer device may further include a friction washer 205 and a diaphragm spring 206. An annular friction washer 205 is mounted between the two side plates 202 and the output flange 204, respectively. Further, a diaphragm spring 206 is provided between one of the side plates 202 and the friction washer 205. The diaphragm spring 206 axially abuts between the side plates 202 and the friction washer 205 in a pre-compressed state, so that the output flange 204 is axially clamped between the two side plates 202.

In the second embodiment, the torque transmitting device 200 may also preferably include a torque limiter. Unlike the first embodiment, the torque limiter of the torque transmitting device 200 may be provided at the front end (engine side) of the first rotating assembly. As shown in fig. 2, the torque transmitting device 200 further includes an input plate 201. The input plate 201 is formed as a generally annular member that is disposed substantially coaxially with the side plate assembly and is rotatable relative to the side plate assembly about an axis of rotation that is substantially coincident with the central axis. The input plate 201 extends from the radially outer side of the side plate assembly to between the outer peripheral edge portions of the two side plates 202, and is clamped between the two side plates 202 directly or indirectly through friction washers or the like so as to be in frictional contact with the two side plates 202. Thus, limited torque can be transmitted between the input plate 201 and the side plate assembly by friction, thereby constituting a torque limiter.

The torque transfer device 200 also includes an output hub 207 and a clutch 208. Similar to the first embodiment, in the second embodiment, the output hub 207 is also formed in a generally disc shape coaxially arranged with the side plate assembly, the output flange 204. The output hub 207 is rotatable relative to the output flange 204 about an axis of rotation that is substantially coincident with the central axis. Preferably, the output hub 207 may be rotatably supported radially outward or radially inward of the output flange 204 by bearings 209. The bearing 209 may be axially positioned on the output hub 207, for example, by a snap ring 210.

The clutch 208 is mounted, in particular axially mounted, between the output flanges 204 of the output hub 207 and is movable therebetween. The clutch 208 is switchable between an engaged state and a disengaged state, such that the output hub 207 is rotationally fixed to or disconnected from the output flange 204 by the clutch 208. The structure and function of the clutch 208 are substantially the same as those of the clutch 109 in the first embodiment, and will not be described again. The torque transmitting device 200 may also include an actuation mechanism 211 disposed proximate the clutch 208. The actuation mechanism 211 may drive the clutch 208 to move, thereby controlling the state of the clutch 208. The function and structure of the actuating mechanism 211 in the second embodiment are also substantially the same as those of the actuating mechanism 11 in the first embodiment.

In various embodiments according to the present invention, torque transmitting device 100 or 200 provides two parallel torque transmitting ends through an output flange and an output hub, and is capable of controlling the state of a torque transmitting path to which the output hub is connected through a clutch. The torque transmitting device may be adapted to a variety of operating modes, particularly for use in a hybrid vehicle. Fig. 4 schematically shows a driveline layout to which a hybrid device according to an embodiment of the invention is applied. As shown in fig. 4, the hybrid vehicle power train includes the torque transmitting device, the first propeller shaft S1, and the second propeller shaft S2 according to the foregoing embodiments. The torque transmitting device is provided at a rear end of the engine E, and an output shaft (crankshaft) of the engine E is connected to an input end (i.e., a first rotating assembly) of the torque transmitting device, so that torque can be transmitted between the engine E and the torque transmitting device. The first transmission shaft S1 is connected to or integrally formed with an input shaft of the motor M (the position of this motor is referred to as the P1 position), and the second transmission shaft S2 is connected to or integrally formed with an input shaft of the transmission T. Fig. 4 shows only briefly a partial structure of the transmission, wherein for example a third drive shaft or the like, which is arranged parallel to the first drive shaft S1 and the second drive shaft S2, may be included.

The P1 electric machine M is always connected to the engine E by a torque transmitting device, while the torque transmission path between the transmission T and the engine E can be switched on or off by a clutch in the torque transmitting device. With the clutch in the disengaged state, the P1 motor M can be charged by the engine E, since the second rotating assembly remains connected to the P1 motor M. When the clutch is in the engaged state, the vehicle may be driven to travel by the engine E and/or the P1 motor M. A plurality of different operating modes of the hybrid vehicle are thereby achieved.

While possible embodiments are exemplarily described in the above description, it should be understood that there are numerous variations of the embodiments still through all known and furthermore easily conceivable combinations of technical features and embodiments by the skilled person. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration of the invention in any way. The technical teaching for converting at least one exemplary embodiment is provided more in the foregoing description to the skilled person, wherein various changes may be made without departing from the scope of the claims, in particular with regard to the function and structure of the components.

Reference numeral table

100. Torque transmission device

101. First flywheel

102. Vibration damping spring

103. Output flange

104. Input flange

105. Second flywheel

106. Support flange

107. Bearing

108. Output hub

109. Clutch device

110. Bearing

111. Actuating mechanism

200. Torque transmission device

201. Input board

202. Side plate

203. Vibration damping spring

204. Output flange

205. Friction washer

206. Diaphragm spring

207. Output hub

208. Clutch device

209. Bearing

210. Clasp ring

211. Actuating mechanism

S1 first transmission shaft

S2 second transmission shaft

E engine

M motor

T-shaped speed changer

Claims

1. A torque transmission device comprises a first rotating assembly, a second rotating assembly and damping springs (102, 203), wherein the first rotating assembly and the second rotating assembly can rotate relatively, the damping springs (102, 203) are abutted between the first rotating assembly and the second rotating assembly along the rotating direction,

it is characterized in that the method comprises the steps of,

the torque transfer device further includes an output hub (108, 207) rotatable relative to the second rotating assembly and a clutch (109, 208) configured to selectively rotationally couple or decouple the second rotating assembly to or from the output hub (108, 207).

2. The torque transmitting device according to claim 1, characterized in that the clutch (109, 208) is mounted axially between the second rotating assembly and the output hub (108, 207).

3. The torque transmitting device according to claim 1, characterized in that the output hub (108, 207) is rotatably supported on the second rotating assembly by means of bearings.

4. The torque transmitting device according to claim 1, characterized in that the first rotating assembly comprises a first flywheel (101), the damper spring (102) abutting in the rotational direction between the first flywheel (101) and the second rotating assembly.

5. The torque transmitting device according to claim 4, characterized in that the second rotating assembly comprises an input flange (104) and an output flange (103), the damper spring (102) being in abutment between the first flywheel (101) and the input flange (104) in the direction of rotation, the input flange (104) being in frictional contact with the output flange (103) for transmitting limited torque, the clutch (109) being mounted between the output flange (103) and the output hub (108).

6. The torque transmitting device according to claim 5, characterized in that the second rotating assembly further comprises a second flywheel (105) fixed to the output flange (103), the second flywheel (105) being located axially on a side of the output flange (103) remote from the first flywheel (101).

7. The torque transfer device of claim 1, wherein the first rotating assembly comprises a side plate assembly, the damper spring (203) abutting in a rotational direction between the side plate assembly and the second rotating assembly.

8. The torque transfer device of claim 7, further comprising an input plate (201), the input plate (201) in frictional contact with the side plate assembly to transfer limited torque.

9. The torque transfer device of claim 7, wherein the second rotating assembly includes an output flange (204), the damper spring (203) is rotationally abutted between the side plate assembly and the output flange (204), and the clutch (208) is mounted between the output flange (204) and the output hub (207).

10. The torque transmitting device according to any one of claims 1 to 9, characterized in that it further comprises an actuating mechanism (111, 211) for controlling the clutch (109, 208).