Clutch device

Abstract

The invention relates to a clutch device. The clutch device comprises an inner hub, an outer hub and a plurality of rolling bodies, the inner hub comprises a plurality of guide profiles which are formed on the radial outer side face and distributed in the circumferential direction, and the circumferential movement range of each rolling body relative to the inner hub is limited between a first limit position and a second limit position by the corresponding guide profile. The first direction of rotation points from a first limit position of each rolling body to a second limit position. The clutch device further comprises a retainer and an elastic bias part, the retainer retains the circumferential positions of the rolling bodies relative to each other, the elastic bias part abuts between the inner hub and the retainer and biases the retainer relative to the inner hub in the circumferential direction opposite to the first rotation direction, and the retainer can be selectively connected with or separated from the outer hub in an anti-torque mode. The clutch device can be switched between a one-way torque transmission state and a two-way torque transmission state.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a clutch device for a transmission system of a motor vehicle. Background Art

[0002] The clutch device is an important component in a motor vehicle. The clutch is usually arranged in the transmission path of the power system of the motor vehicle so as to control the transmission path to be connected or disconnected as required, thereby achieving different driving states.

[0003] There are many different types of clutch devices, and different types of clutch devices are suitable for different transmission scenarios. For example, a friction disc clutch device is a common clutch device, which is only suitable for two-way torque transmission. Another clutch device is a tooth-type clutch device, such as the clutch disclosed in CN 104565101A. This clutch has impact when the key teeth are engaged, thereby causing NVH (vibration, noise and harshness) problems. Another clutch device is a sleeve-type freewheel clutch device, such as the clutch device disclosed in WO 2022 / 167019 A1. This clutch device can usually only achieve one-way torque transmission.

[0004] However, in conventional systems such as hybrid vehicles, in order to adapt to different driving modes, it is expected that the clutch device can provide both a bidirectional torque transmission function and a unidirectional torque transmission function. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to provide a clutch device that can switch between a one-way torque transmission state and a two-way torque transmission state.

[0006] The above technical problems are solved by a clutch device according to the present invention. The clutch device comprises an inner hub, an outer hub and a plurality of rolling bodies, the inner hub and the outer hub are coaxially arranged so as to be relatively rotatable, the inner hub comprises a plurality of guide profiles formed on a radially outer surface and distributed in a circumferential direction, each rolling body is arranged between a corresponding guide profile and the outer hub in a radial direction, a circumferential motion range of each rolling body relative to the inner hub is limited by a corresponding guide profile between a first limit position and a second limit position, a first rotation direction points from the first limit position of each rolling body to the second limit position, at least a portion of the plurality of rolling bodies abuts between a corresponding guide profile and the outer hub when located at a corresponding first limit position, so as to be able to transmit torque from the inner hub rotating in the first rotation direction to the outer hub, at least a portion of the plurality of rolling bodies abuts between a corresponding guide profile and the outer hub when located at a corresponding second limit position, so as to be able to transmit torque from the outer hub rotating in the first rotation direction to the inner hub, and the plurality of rolling bodies cannot abut against the inner hub and the outer hub at the same time to transmit torque when located at other positions between the corresponding first limit position and the second limit position. The clutch device further comprises a retainer and an elastic biasing member, wherein the retainer retains the circumferential positions of the plurality of rolling elements relative to each other, the elastic biasing member abuts between the inner hub and the retainer and biases the retainer relative to the inner hub in a circumferential direction opposite to the first rotation direction; the retainer can selectively engage or separate with the outer hub in a torsion-resistant manner, and when the retainer is separated from the outer hub, the retainer keeps each rolling element away from the corresponding second limit position under the biasing force of the elastic biasing member, and when the retainer is engaged in a torsion-resistant manner with the outer hub, the outer hub rotating in the first rotation direction can drive the retainer to overcome the biasing force of the elastic biasing member so as to allow each rolling element to reach the corresponding second limit position. When the retainer is separated from the outer hub, the torque can only be transmitted from the inner hub rotating in the first rotation direction to the outer hub but cannot be transmitted from the outer hub rotating in the first rotation direction to the inner hub, and the clutch device is in a one-way torque transmission state; when the retainer is engaged in a torsion-resistant manner with the outer hub, the torque can be transmitted from the inner hub to the outer hub as well as from the outer hub to the inner hub, and the clutch device is in a two-way torque transmission state. Thereby, the clutch device can be switched between a one-way torque transmission state and a two-way torque transmission state.

[0007] According to a preferred embodiment of the present invention, each rolling body can abut between the corresponding guide profile and the outer hub when located at the corresponding first extreme position and abut between the corresponding guide profile and the outer hub when located at the corresponding second extreme position. Thereby, each rolling body can provide a bidirectional torque transmission function. In this case, the clutch device can include a plurality of elastic buffers, and each rolling body abuts against the retaining frame on both sides of the circumference through corresponding elastic buffers. The elastic buffers can not only reduce the impact force between the rolling body and the retaining frame, but also compensate for the deviation of the circumferential position of different rolling bodies relative to their respective guide profiles, so that multiple rolling bodies can be simultaneously located at the corresponding extreme positions when transmitting torque.

[0008] According to another preferred embodiment of the present invention, the plurality of guide profiles may include at least one first guide profile and at least one second guide profile, each rolling body guided by the at least one first guide profile abuts between the corresponding first guide profile and the outer hub only when it is located at the corresponding first limit position, and each rolling body guided by the at least one second guide profile abuts between the corresponding second guide profile and the outer hub only when it is located at the corresponding second limit position. Thus, each rolling body can only provide a one-way torque transmission function, and torque transmission functions in different directions are allocated to different rolling bodies. In this case, the clutch device may include a plurality of elastic buffers, each rolling body guided by the at least one first guide profile abuts against the retaining frame on the side facing the first rotation direction through the corresponding elastic buffer, and each rolling body guided by the at least one second guide profile abuts against the retaining frame on the side facing away from the first rotation direction through the corresponding elastic buffer. The elastic buffer can not only reduce the impact force between the rolling body and the retaining frame, but also compensate for the deviation of the circumferential position of different rolling bodies relative to their respective guide profiles, so that multiple rolling bodies can be simultaneously located at the corresponding limit positions when transmitting torque.

[0009] According to another preferred embodiment of the present invention, the retainer may include an annular ring body and a stopper connected to the ring body, the plurality of rolling elements are retained in the ring body, the inner hub includes a recess formed in the axial end face, the stopper extends into the recess, and the elastic biasing member abuts between the stopper and the side wall of the recess. The elastic biasing member is thereby accommodated in the recess on the axial end face of the inner hub. In this case, the clutch device may include a plurality of elastic biasing members spaced circumferentially, the retainer may include a plurality of stoppers spaced circumferentially, the inner hub may include a plurality of recesses spaced circumferentially, each elastic biasing member abuts between a corresponding stopper and the side wall of a corresponding recess. The number of elastic biasing members may be set according to the size of the inner hub and the required biasing force.

[0010] According to another preferred embodiment of the present invention, the clutch device may include a connecting sleeve, the retaining frame is connected to the connecting sleeve in a torsion-proof manner, and the connecting sleeve can be moved relative to the outer hub so as to selectively engage or disengage with the outer hub in a torsion-proof manner. The retaining frame can thereby selectively engage or disengage with the outer hub in a torsion-proof manner through the connecting sleeve.

[0011] According to another preferred embodiment of the present invention, the connecting sleeve is capable of axially moving relative to the outer hub so as to selectively engage or disengage with the outer hub in a torsionally rigid manner, the connecting sleeve includes an axially extending socket, the retaining frame includes an insertion portion extending axially toward the connecting sleeve, and the insertion portion is axially movably inserted into the socket, thereby torsionally connecting the retaining frame to the connecting sleeve in an axially movably manner.

[0012] According to another preferred embodiment of the present invention, the connecting sleeve may include a tapered inner surface area, and the outer hub includes a tapered outer surface area, the tapered inner surface area is located radially outside the tapered outer surface area, and the tapered inner surface area and the tapered outer surface area can be selectively frictionally engaged or separated by axial movement of the connecting sleeve. The connecting sleeve and the outer hub can thus achieve a torsion-resistant connection by friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described below in conjunction with the accompanying drawings. The same reference numerals in the drawings represent elements with the same functions. Among them:

[0014] Figure 1 A cross-sectional view showing a clutch device according to an exemplary embodiment of the present invention;

[0015] Figure 2 Show Figure 1 A partial enlarged view of the cross-sectional view shown;

[0016] Figure 3 Show Figure 1 A perspective view of the clutch device shown;

[0017] Figure 4a and Figure 4b Show Figure 1 A plan view of the clutch device shown;

[0018] Figure 5 A perspective view showing a clutch device according to another exemplary embodiment of the present invention; and

[0019] Figure 6a and Figure 6b Show Figure 5 A plan view of the clutch device shown. DETAILED DESCRIPTION

[0020] The following detailed description and drawings are used to illustrate the principle of the present invention. The present invention is not limited to the preferred embodiments described. The protection scope of the present invention is defined by the claims.

[0021] According to an embodiment of the present invention, a clutch device for a motor vehicle is provided. The clutch device is used to be arranged in a transmission system of the motor vehicle so as to realize different transmission modes of the transmission system.

[0022] Figures 1 to 4b An exemplary embodiment of a clutch device according to the invention is shown. Figure 1 2 shows a cross-sectional view through the central axis of the clutch device according to this exemplary embodiment. Figure 1As shown, the clutch device is arranged between a first transmission shaft 1 and a second transmission shaft 2 so as to transmit torque therebetween as required. The first transmission shaft 1 may be, for example, an output shaft of an internal combustion engine of a motor vehicle, and the second transmission shaft 2 may be, for example, a transmission shaft torsionally connected to an output shaft of a generator motor of the motor vehicle. The clutch device comprises an inner hub 3, an outer hub 4, a plurality of rolling elements 5, a retainer 6 and an elastic biasing member 7.

[0023] The inner hub 3 is a generally circular component that is connected to the first transmission shaft 1 in a torsion-proof manner and arranged coaxially. The outer hub 4 is a generally circular component that is connected to the second transmission shaft 2 in a torsion-proof manner and arranged coaxially. The inner hub 3 and the outer hub 4 are arranged coaxially and can rotate relative to each other around a common central axis. At least a portion of the outer hub 4 surrounds the radial outer side of the inner hub 3 to provide a radial inner side surface that faces radially inwardly toward the inner hub 3. Accordingly, the inner hub 3 has a radial outer side surface that faces radially outwardly toward the radial inner side surface of the outer hub 4. There is a radial gap between the radial outer side surface of the inner hub 3 and the radial inner side surface of the outer hub 4, so that the two cannot directly contact each other.

[0024] like Figure 1 and Figure 3 As shown, a plurality of rolling bodies 5 are radially arranged between the radial outer side of the inner hub 3 and the radial inner side of the outer hub 4 and are distributed at intervals (preferably uniform intervals) in the circumferential direction. Each rolling body 5 can be a substantially cylindrical component, and its central axis is substantially parallel to the central axis of the inner hub 3 and the outer hub 4.

[0025] The inner hub 3 includes a plurality of guide profiles 3a formed on the radially outer side and distributed in the circumferential direction. Figure 4a and Figure 4b As shown, each guide profile 3a extends circumferentially in the radial outer side surface of the inner hub 3, so as to have a radially concave profile in a cross section perpendicular to the central axis. The number of guide profiles 3a is the same as the number of rolling elements 5, so that each rolling element 5 corresponds to a corresponding guide profile 3a. Each rolling element 5 is arranged radially between the corresponding guide profile 3a and the outer hub 4. The radial concave depth of the guide profile 3a changes with the circumferential position, so that the radial distance between the guide profile 3a and the outer hub 4 is inconsistent in the circumferential direction, thereby limiting the circumferential movement range of each rolling element 5 relative to the inner hub 3.

[0026] Specifically, the circumferential motion range of each rolling element 5 relative to the inner hub 3 is limited by the corresponding guide profile 3a in the first limit position ( Figure 4a ) and the second limit position ( Figure 4b). The first limit position and the second limit position are two circumferential end positions that the rolling element 5 can reach within the extension range of the corresponding guide profile 3a, and the rolling element 5 cannot exceed the two limit positions and reach outside the circumferential rotation range. Wherein, a first rotation direction R is defined, and the circumferential position relationship between the first limit position and the second limit position of each rolling element 5 relative to the first rotation direction R is the same, that is, the first rotation direction R points from the first limit position of each rolling element 5 to the second limit position.

[0027] exist Figures 1 to 4b In the illustrated embodiment, the radial depth of each guide profile 3a gradually decreases from the circumferential middle toward both ends, so that each rolling element 5 abuts between the corresponding guide profile 3a and the outer hub 4 when located at the corresponding first limit position, and abuts between the corresponding guide profile 3a and the outer hub 4 when located at the corresponding second limit position. At the same time, the radial distance of other positions between the first limit position and the second limit position relative to the radial inner side of the outer hub 4 is greater than the radial size of the rolling element 5, so that the rolling element 5 located at other positions between the corresponding first limit position and the second limit position cannot abut against the inner hub 3 and the outer hub 4 at the same time. The rolling element 5 abutting between the corresponding guide profile 3a and the outer hub 4 at the first extreme position can transmit torque from the inner hub 3 rotating in the first rotation direction R to the outer hub 4 (correspondingly, it can also transmit torque from the outer hub 4 rotating in the direction opposite to the first rotation direction R to the inner hub 3), but cannot transmit torque from the outer hub 4 rotating in the first rotation direction R to the inner hub 3, while the rolling element 5 abutting between the corresponding guide profile 3a and the outer hub 4 at the second extreme position can transmit torque from the outer hub 4 rotating in the first rotation direction R to the inner hub 3 (correspondingly, it can also transmit torque from the inner hub 3 rotating in the direction opposite to the first rotation direction R to the outer hub 4), but cannot transmit torque from the inner hub 3 rotating in the first rotation direction R to the outer hub 4. When the rolling element 5 is located at other positions between the corresponding first extreme position and the second extreme position, torque in any direction cannot be transmitted between the inner hub 3 and the outer hub 4 via the rolling element 5. It can be seen from this that the allowable torque transmission direction between the inner hub 3 and the outer hub 4 depends on the position of the rolling element 5 relative to the guide profile 3a.

[0028] like Figure 3 As shown, each rolling body 5 is held in the same cage 6 in the circumferential direction. The circumferential positions of all rolling bodies 5 relative to each other are held by the cage 6. Specifically, the cage 6 may include an annular (especially cylindrical) ring body 6a for holding these rolling bodies 5, and the ring body 6a is coaxially arranged between the inner hub 3 and the outer hub 4. The ring body 6a is formed with a plurality of radially penetrating pockets, and each rolling body 5 is arranged in a corresponding pocket. Due to the restraining effect of the cage 6, the circumferential movement of these rolling bodies 5 is basically synchronized, and thus they are located at substantially the same circumferential position relative to their respective guide profiles 3a.

[0029] The elastic biasing member 7 abuts between the inner hub 3 and the retaining frame 6 in a pre-compressed state and biases the retaining frame 6 relative to the inner hub 3 in a circumferential direction opposite to the first rotation direction R. The elastic biasing member 7 can be, for example, a coil spring or other types of elastic members. The biasing force provided by the elastic biasing member 7 causes the retaining frame 6 to tend to push each rolling element 5 toward the corresponding first limit position.

[0030] The retainer 6 can selectively engage or disengage with the outer hub 4 in a torsion-proof manner. When the retainer 6 is separated from the outer hub 4, the retainer 6 can rotate freely relative to the outer hub 4. At this time, the retainer 6 keeps each rolling element 5 away from the corresponding second limit position under the biasing force of the elastic biasing member 7, so that each rolling element 5 can only reach the first limit position but not the second limit position. This means that the torque can only be transmitted from the inner hub 3 rotating along the first rotation direction R to the outer hub 4 but not from the outer hub 4 rotating along the first rotation direction R to the inner hub 3, or can only be transmitted from the outer hub 4 rotating in the direction opposite to the first rotation direction R to the inner hub 3 but not from the inner hub 3 rotating in the direction opposite to the first rotation direction R to the outer hub 4, and the clutch device is therefore in a one-way torque transmission state.

[0031] When the retainer 6 is in torsion-proof engagement with the outer hub 4, the retainer 6 cannot rotate freely relative to the outer hub 4. At this time, the outer hub 4 rotating in the first rotation direction R can drive the retainer 6 to overcome the biasing force of the elastic biasing member 7, thereby allowing each rolling element 5 to reach the corresponding second extreme position, so that each rolling element 5 can move between the two extreme positions according to the rotation direction and the torque transmission direction. This means that the torque can be transmitted from the inner hub 3 to the outer hub 4 and from the outer hub 4 to the inner hub 3, and the clutch device is therefore in a two-way torque transmission state.

[0032] Preferably, the elastic biasing member 7 can be arranged in the following manner. Figure 3 As shown, the inner hub 3 may include a recess 3b formed in an axial end face. The recess 3b may be axially recessed from the axial end face of the inner hub 3 facing away from the second transmission shaft 2. The elastic biasing member 7 is accommodated in the recess 3b. The retaining frame 6 includes a stopper 6b connected to the ring body 6a, and the stopper 6b extends into the recess 3b. The elastic biasing member 7 abuts between the stopper 6b and the side wall of the recess 3b in a pre-compressed state approximately in the circumferential direction. The first rotation direction R points from the stopper 6b to the side wall of the recess 3b via the elastic biasing member 7.

[0033] The number of elastic biasing members 7, stoppers 6b and recesses 3b is the same, and can be one or more. The number of elastic biasing members 7 can be set according to the size of the inner hub 3 and the required biasing force. Preferably, the clutch device may include a plurality of elastic biasing members 7 distributed along the circumferential interval (preferably uniform interval), the retaining frame 6 may include a corresponding plurality of stoppers 6b distributed along the circumferential interval (preferably uniform interval), the inner hub 3 may include a corresponding plurality of recesses 3b distributed along the circumferential interval (preferably uniform interval), and each elastic biasing member 7 abuts between the corresponding stopper 6b and the side wall of the corresponding recess 3b.

[0034] like Figure 3 As shown, in this embodiment, the clutch device may also include a plurality of elastic buffers 8. Each rolling element 5 abuts against the retaining frame 6 on both sides of the circumference through corresponding elastic buffers 8. These elastic buffers 8 may be, for example, folding springs or other types of elastic members. The elastic buffers 8 can not only reduce the impact force between the rolling element 5 and the retaining frame 6, but also compensate for the deviation (processing or assembly error) of the circumferential position of different rolling elements 5 relative to their respective guide profiles 3b, so that all rolling elements 5 can reach the corresponding limit position at the same time to transmit torque.

[0035] Preferably, the optional torsion-resistant connection between the retaining frame 6 and the outer hub 4 can be achieved in the following manner. Figure 1 and Figure 2 As shown, the clutch device may include a connecting sleeve 9. The retainer 6 is connected to the connecting sleeve 9 in a torsion-proof manner. The connecting sleeve 9 can move relative to the outer hub 4 so as to selectively engage or disengage with the outer hub 4 in a torsion-proof manner. The movement of the connecting sleeve 9 relative to the outer hub 4 can be driven and controlled by an actuator 10, for example. The actuator 10 can be an actuator of any known type, such as an electromagnetic, hydraulic, or pneumatic actuator. The retainer 6 can thus be selectively engaged or disengaged with the outer hub 4 in a torsion-proof manner through the connecting sleeve 9.

[0036] Preferably, the connecting sleeve 9 can be axially moved relative to the outer hub 4 so as to selectively engage or disengage with the outer hub 4 in a torsionally fixed manner. When the connecting sleeve 9 moves axially relative to the outer hub 4, it also moves axially relative to the retaining frame 6. In order to allow such axial movement, the retaining frame 6 may include one or more insert portions 6c ( Figure 3 ), the connecting sleeve 9 may include one or more axially extending sockets (not shown) corresponding to the insertion portion 6c, each insertion portion 6c is axially inserted into the corresponding socket and can move axially in the socket relative to the connecting sleeve 9, thereby connecting the retaining frame 6 to the connecting sleeve 9 in a torsion-proof manner in an axially movable manner.

[0037] Preferably, the anti-torsion engagement between the connecting sleeve 9 and the outer hub 4 can be achieved by friction engagement. Figure 2As shown, the connecting sleeve 9 may include a tapered inner surface area 9c around the central axis, and correspondingly, the outer hub 4 may include a tapered outer surface area 4a around the central axis. The tapered inner surface area 9c is located radially outside the tapered outer surface area 4a, and in a section passing through the central axis, the two surface areas have substantially the same inclination direction with respect to the central axis. According to the axial movement position of the connecting sleeve 9, the tapered inner surface area 9c and the tapered outer surface area 4a can selectively frictionally engage with each other or separate from each other.

[0038] For ease of processing, the connecting sleeve 9 may include a first portion 9a and a second portion 9b. The first portion 9a extends approximately radially on the side of the inner hub 3 facing away from the second transmission shaft 2, and the second portion 9b extends approximately axially on the radially outer side of the outer hub 4, and the second portion 9b is fixed to the flange portion on the radially outer side of the first portion 9a. The plug hole may be formed in the first portion 9a. The tapered inner surface area 9c may be formed on the second portion 9b.

[0039] Figures 5 to 6b A further exemplary embodiment of a clutch device according to the invention is shown. Figures 5 to 6b The embodiment shown is Figures 1 to 4b The difference of the embodiment shown is that each rolling element 5 can only abut between the corresponding guide profile 3a and the outer hub 4 at the first extreme position or at the second extreme position to transmit torque, and torques in different directions are realized by rolling elements 5 on different guide profiles 3a. Specifically, Figure 6a and Figure 6b As shown, all guide profiles 3a are divided into two different types of guide profiles 3a, namely, at least one first guide profile 3a1 and at least one second guide profile 3a2. Each rolling body 5 guided by the first guide profile 3a1 abuts between the corresponding first guide profile 3a1 and the outer hub 4 only when it is located in the corresponding first extreme position, and each rolling body 5 guided by the second guide profile 3a2 abuts between the corresponding second guide profile 3a and the outer hub 4 only when it is located in the corresponding second extreme position. At the same time, the radial distance of other positions relative to the radial inner side of the outer hub 4 is greater than the radial size of the rolling body 5, so that the rolling body 5 located in other positions cannot abut against the inner hub 3 and the outer hub 4 at the same time. This means that when these rolling bodies 5 are held in the first extreme position by the retaining frame 6 ( Figure 6a ), only the rolling element 5 guided by the first guide profile 3a1 can play the role of Figures 1 to 4b The rolling elements 5 in the embodiment shown have the same torque transmission effect, while the rolling elements 5 guided by the second guide profile 3a2 cannot transmit torque; when these rolling elements 5 are held in the second limit position by the cage 6 ( Figure 6b ), only the rolling element 5 guided by the second guide profile 3a2 can play the role of Figures 1 to 4bThe rolling element 5 in the embodiment shown in the figure has the same torque transmission effect, while the rolling element 5 guided by the first guide profile 3a1 cannot transmit torque. This makes each rolling element only able to provide a one-way torque transmission function, and the torque transmission functions in different directions are assigned to different rolling elements. However, the entire clutch device can achieve the same Figures 1 to 4b The first guide profiles 3a1 and the second guide profiles 3a2 may preferably have the same number and be arranged alternately in the circumferential direction.

[0040] In this embodiment, the clutch device may also preferably include a plurality of elastic buffer members 8. Figures 1 to 4b The embodiment shown, as Figures 5 to 6b As shown, each rolling element 5 in this embodiment can abut only one elastic buffer 8. Specifically, each rolling element 5 guided by the first guide profile 3a1 abuts against the retaining frame 6 through the corresponding elastic buffer 8 on the side facing the first rotation direction R, and each rolling element 5 guided by the second guide profile 3a2 abuts against the retaining frame 6 through the corresponding elastic buffer 8 on the side facing away from the first rotation direction R. In other words, it is only necessary to set the elastic buffer 8 on the side of each rolling element 5 facing away from the extreme position where it can realize the torque transmission function (that is, it can abut between the corresponding guide profile 3a and the outer hub 4).

[0041] In addition to the above differences, Figures 5 to 6b The embodiment shown is different from the embodiment shown in terms of the design of other components such as the retaining frame 6, the elastic biasing member 7 and the connecting sleeve 9. Figures 1 to 4b The embodiments shown are basically the same and will not be described again in detail.

[0042] The clutch device according to the present invention can realize switching between a unidirectional torque transmission state and a bidirectional torque transmission state, and is thus particularly suitable for a transmission system with multiple working states. For example, the clutch device can be arranged between the internal combustion engine and the generator motor of a hybrid vehicle, wherein the inner hub 3 is connected to the internal combustion engine and the outer hub 4 is connected to the generator motor. In the series mode of the internal combustion engine and the generator motor, the clutch device can be in a bidirectional torque transmission state, thereby allowing the internal combustion engine to charge the generator motor; in the parallel mode of the internal combustion engine and the generator motor, the clutch device can be in a bidirectional torque transmission state, thereby allowing the internal combustion engine to drive the wheels and charge the generator motor at the same time; in the ignition start mode of the internal combustion engine, the clutch device can be in a bidirectional torque transmission state, thereby allowing the generator motor to start the internal combustion engine; in the pure electric drive mode in which the internal combustion engine is disconnected, the clutch device can be in a unidirectional torque transmission state, thereby allowing the generator motor to drive the wheels, but not allowing the generator motor to transmit torque to the internal combustion engine. In addition, this clutch device can also be used to connect the auxiliary drive motor and the wheel of the auxiliary drive axle. In addition, this clutch device is smooth in switching state or direction transition and has good NVH performance.

[0043] Although possible embodiments are described by way of example in the above description, it should be understood that there are still a large number of variations of embodiments through the combination of all known and other technical features and embodiments that are easily conceivable to the skilled person. It should also be understood that the exemplary embodiment is only an example and that such an embodiment in no way limits the scope of protection, application and configuration of the present invention. The above description is more to provide the skilled person with a technical guide for converting at least one exemplary embodiment, wherein various changes can be made, especially changes in the functions and structures of the components, as long as they do not depart from the scope of protection of the claims.

[0044] Reference numerals list

[0045] 1 First transmission shaft

[0046] 2 Second transmission shaft

[0047] 3 Inner hub

[0048] 3a Guide profile

[0049] 3a1 First guide profile

[0050] 3a2 Second guide profile

[0051] 3b Concave

[0052] 4 Outer hub

[0053] 4a Conical outer surface area

[0054] 5 Rolling elements

[0055] 6 Cage

[0056] 6a Circle

[0057] 6b Stopper

[0058] 6c Insertion

[0059] 7 Elastic biasing member

[0060] 8 Elastic buffer

[0061] 9 Connecting sleeve

[0062] 9a Part 1

[0063] 9b Part 2

[0064] 9c Conical inner surface area

[0065] 10 Actuator

[0066] R First direction of rotation

Claims

1. A clutch device, comprising an inner hub (3), an outer hub (4) and a plurality of rolling bodies (5), wherein the inner hub (3) and the outer hub (4) are coaxially arranged so as to be relatively rotatable, the inner hub (3) comprising a plurality of guide profiles (3a) formed on a radially outer surface and distributed in a circumferential direction, each rolling body (5) being arranged radially between a corresponding guide profile (3a) and the outer hub (4), the circumferential motion range of each rolling body (5) relative to the inner hub (3) being limited by the corresponding guide profile (3a) between a first limit position and a second limit position, a first rotation direction (R) pointing from the first limit position of each rolling body (5) to the second limit position, at least one of the plurality of rolling bodies (5) When located at a corresponding first extreme position, a portion of the plurality of rolling elements (5) abuts between a corresponding guide profile (3a) and the outer hub (4), thereby enabling torque to be transmitted from the inner hub (3) rotating along the first rotation direction (R) to the outer hub (4); when located at a corresponding second extreme position, at least a portion of the plurality of rolling elements (5) abuts between a corresponding guide profile (3a) and the outer hub (4), thereby enabling torque to be transmitted from the outer hub (4) rotating along the first rotation direction (R) to the inner hub (3); when located at other positions between the corresponding first extreme position and the second extreme position, the plurality of rolling elements (5) cannot simultaneously abut against the inner hub (3) and the outer hub (4) to transmit torque. It is characterized in that The clutch device further comprises a retainer (6) and an elastic biasing member (7), wherein the retainer (6) maintains the circumferential positions of the plurality of rolling elements (5) relative to each other, and the elastic biasing member (7) abuts between the inner hub (3) and the retainer (6) and biases the retainer (6) relative to the inner hub (3) in a circumferential direction opposite to the first rotation direction (R); The retaining frame (6) can selectively engage or disengage with the outer hub (4) in a torsion-resistant manner. When the retaining frame (6) is separated from the outer hub (4), the retaining frame (6) keeps each rolling element (5) away from the corresponding second extreme position under the action of the biasing force of the elastic biasing member (7). When the retaining frame (6) is engaged with the outer hub (4) in a torsion-resistant manner, the outer hub (4) rotating along the first rotation direction (R) can drive the retaining frame (6) to overcome the biasing force of the elastic biasing member (7) so as to allow each rolling element (5) to reach the corresponding second extreme position.

2. The clutch device according to claim 1, characterized in that: Each rolling element (5) abuts between the corresponding guide profile (3a) and the outer hub (4) when it is in the corresponding first extreme position and abuts between the corresponding guide profile (3a) and the outer hub (4) when it is in the corresponding second extreme position.

3. The clutch device according to claim 2, characterized in that: The clutch device comprises a plurality of elastic buffer members (8), and each rolling body (5) abuts against the retaining frame (6) on both sides in the circumferential direction through corresponding elastic buffer members (8).

4. The clutch device according to claim 1, characterized in that: The multiple guide profiles (3a) include at least one first guide profile (3a1) and at least one second guide profile (3a2); each rolling body (5) guided by the at least one first guide profile (3a1) abuts between the corresponding first guide profile (3a1) and the outer hub (4) only when it is located at the corresponding first extreme position; each rolling body (5) guided by the at least one second guide profile (3a2) abuts between the corresponding second guide profile (3a2) and the outer hub (4) only when it is located at the corresponding second extreme position.

5. The clutch device according to claim 4, characterized in that: The clutch device comprises a plurality of elastic buffers (8), each rolling body (5) guided by the at least one first guide profile (3a1) abuts against the retaining frame (6) on the side facing the first rotation direction (R) via a corresponding elastic buffer (8), and each rolling body (5) guided by the at least one second guide profile (3a2) abuts against the retaining frame (6) on the side facing away from the first rotation direction (R) via a corresponding elastic buffer (8).

6. The clutch device according to claim 1, characterized in that: The retaining frame (6) includes an annular ring body (6a) and a stopper (6b) connected to the ring body (6a), the plurality of rolling elements (5) are retained in the ring body (6a), the inner hub (3) includes a recess (3b) formed in an axial end face, the stopper (6b) extends into the recess (3b), and the elastic biasing member (7) abuts between the stopper (6b) and the side wall of the recess (3b).

7. The clutch device according to claim 6, characterized in that: The clutch device comprises a plurality of elastic biasing members (7) distributed along the circumferential direction, the retaining frame (6) comprises a plurality of stop portions (6b) distributed along the circumferential direction, the inner hub (3) comprises a plurality of recesses (3b) distributed along the circumferential direction, and each elastic biasing member (7) abuts between a corresponding stop portion (6b) and a side wall of a corresponding recess (3b).

8. The clutch device according to any one of claims 1 to 7, characterized in that: The clutch device comprises a connecting sleeve (9), the retaining frame (6) is connected to the connecting sleeve (9) in a torsion-proof manner, and the connecting sleeve (9) can move relative to the outer hub (4) so ​​as to selectively engage with or disengage from the outer hub (4) in a torsion-proof manner.

9. The clutch device according to claim 8, characterized in that: The connecting sleeve (9) is capable of axially moving relative to the outer hub (4) so ​​as to selectively engage or disengage with the outer hub (4) in a torsion-proof manner. The connecting sleeve (9) includes an axially extending socket. The retaining frame (6) includes an insertion portion (6c) extending axially toward the connecting sleeve (9). The insertion portion (6c) is axially movably inserted into the socket, so as to connect the retaining frame (6) to the connecting sleeve (9) in a torsion-proof manner in an axially movably manner.

10. The clutch device according to claim 9, characterized in that: The connecting sleeve (9) includes a conical inner surface area (9c), and the outer hub (4) includes a conical outer surface area (4a). The conical inner surface area (9c) is located radially outside the conical outer surface area (4a), and the conical inner surface area (9c) and the conical outer surface area (4a) can be selectively frictionally engaged or disengaged through axial movement of the connecting sleeve (9).

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