Electric Clutch Actuator

Abstract

The utility model discloses an electric drive clutch actuator, which belongs to automobile power transmission technology. The existing hydraulic drive automatic clutch actuator has a high manufacturing cost. The utility model is driven by a motor to rotate a rotating ring, and the rotation of the rotating ring is converted into the axial movement of the first moving ring through the transmission of the first axial undulating surface, the first rolling body and the second axial undulating surface of the first moving ring, and then the first moving ring moves axially with the first release bearing to control the clutch. The electric drive clutch actuator changes the hydraulic drive to electric drive, omits the hydraulic system, simplifies the product structure, reduces the manufacturing cost, saves energy and protects the environment, and has reliable performance.

Description

Technical Field

[0001] The utility model belongs to automobile power transmission technology, and in particular relates to an electric drive clutch actuator, which is used for realizing the engagement and separation of an automatic transmission clutch plate of an electrified vehicle. Background Art

[0002] The existing mature clutch release actuators include mechanical release bearings and hydraulic release assemblies suitable for manual transmission, and mechanical dual-clutch release actuators, dry dual-clutch actuators, and wet dual-clutch actuators suitable for automatic transmission. Existing automatic transmission clutch actuators almost all rely on hydraulics to transfer power to achieve drive, and the overall manufacturing cost is relatively high. In the general environment of reducing manufacturing costs, the existing hydraulically driven automatic transmission clutch actuator is not the preferred solution. In addition, the electrification of vehicles is the trend of the times, and hydraulic transmission will gradually fade out of the stage of automotive power transmission. Therefore, designing a new type of separator actuator that is electric, energy-saving, environmentally friendly, low-cost and reliable has become an objective need at present. Utility Model Content

[0003] The technical problem to be solved and the technical task proposed by the utility model are to overcome the defect of high manufacturing cost of the existing hydraulically driven automatic clutch actuator, and to provide an electric, energy-saving, environmentally friendly, low-cost and reliable electric-driven clutch actuator.

[0004] In order to achieve the above object, the electric drive clutch actuator of the utility model comprises:

[0005] A base having a mounting portion and a sleeve, wherein the sleeve extends axially and has a first end and a second end in the axial direction, and the mounting portion is connected to the sleeve at the first end and extends radially;

[0006] A thrust bearing is rotatably mounted on the radially outer side of the sleeve and relies on the mounting portion;

[0007] The pushing mechanism comprises a rotating ring, a first rolling body and a first moving ring which are sequentially distributed in the axial direction away from the mounting portion; the rotating ring can be rotatably mounted on the radial outer side of the sleeve and relies on the thrust bearing, the rotating ring can be driven to rotate by the motor mechanism, the rotating ring is provided with a first axial undulating surface extending circumferentially and facing the second end of the sleeve; the first moving ring can be axially movably mounted on the radial outer side of the sleeve, the first moving ring is provided with a second axial undulating surface extending circumferentially and facing the first end of the sleeve, the second axial undulating surface is axially opposite to the first axial undulating surface and has an opposite circumferential undulating direction; the first rolling body is located between the axially opposite first axial undulating surface and the second axial undulating surface to convert the rotation of the rotating ring into the axial movement of the first moving ring;

[0008] The first release bearing is assembled to the first moving ring so as to move axially together with the first moving ring.

[0009] The electric-driven clutch actuator is driven by a motor to rotate a rotating ring, and the rotation of the rotating ring is converted into an axial movement of the first moving ring through the transmission of the first axial undulating surface, the first rolling body and the second axial undulating surface, and then the first moving ring moves axially with the first release bearing to control the engagement and separation of the clutch. The electric-driven clutch actuator changes the hydraulic drive to an electric drive, omits the hydraulic system, simplifies the product structure, reduces the manufacturing cost, is energy-saving and environmentally friendly, and has reliable performance. Among them, under the rotation support of the thrust bearing and the first rolling body, the rotating ring moves lightly and has high transmission efficiency.

[0010] Preferably, the first axial undulating surface and the second axial undulating surface are uniformly distributed and concentrically arranged in the same number. Accordingly, by means of the axial transmission of the first axial undulating surface, the second axial undulating surface and the first rolling body therebetween, the first movable ring can be synchronously and accurately driven to move axially, ensuring that the first release bearing moves axially together with the first movable ring.

[0011] Preferably, a first blocking portion is provided at the highest point of the first axial undulating surface, and a second blocking portion is provided at the highest point of the second axial undulating surface. Accordingly, the first rolling body can be constrained between the first axial undulating surface and the second axial undulating surface that are axially opposite to each other, ensuring that the first rolling body does not go offside when moving forward, does not fall behind when moving backward, and moves along a strictly designed trajectory.

[0012] Preferably, a retainer is arranged on both the radial outer side and the radial inner side of the first rolling body. Accordingly, the first rolling body can be kept in a suitable position to ensure that the rotation of the rotating ring is accurately converted into the axial movement of the first moving ring and the first release bearing. Moreover, the retainer is integrally formed on the rotating ring or / and the first moving ring, which can simplify the internal structure.

[0013] Preferably, the first movable ring is axially movable and sleeved on the radial outer side of the sleeve via a spline structure, thereby ensuring the flexible axial movement of the first movable ring and the first release bearing and preventing their circumferential rotation.

[0014] Preferably, the rotating ring is provided with a third axial undulating surface extending circumferentially and facing the second end of the sleeve, the third axial undulating surface is coaxial with the first axial undulating surface and is located radially outside the first axial undulating surface, and the undulating direction of the third axial undulating surface along the circumferential direction is opposite to that of the first axial undulating surface;

[0015] The radial outer side of the first movable ring is axially movably sleeved with a second movable ring, the second movable ring is provided with a fourth axial undulating surface extending circumferentially and facing the first end of the sleeve, and the undulating direction of the fourth axial undulating surface along the circumferential direction is opposite to that of the second axial undulating surface;

[0016] The fourth axial undulating surface is axially opposite to the third axial undulating surface and has opposite circumferential undulating directions, and a second rolling body is distributed between the third axial undulating surface and the fourth axial undulating surface to convert the rotation of the rotating ring into the axial movement of the second moving ring;

[0017] The second moving ring is equipped with a second release bearing which moves axially together with the second release bearing, and the second release bearing is located axially outside the first release bearing.

[0018] Accordingly, by coaxially arranging the first release bearing and the second release bearing to work alternately, gapless clutch switching of the dual clutch is achieved, ensuring smooth shifting of the clutch.

[0019] Preferably, a third blocking portion is provided at the highest point of the third axial undulating surface, and a fourth blocking portion is provided at the highest point of the fourth axial undulating surface. Accordingly, the second rolling body can be constrained between the third axial undulating surface and the fourth axial undulating surface which are axially opposite to each other, ensuring that the second rolling body does not go offside when moving forward, does not fall behind when moving backward, and moves along a strictly designed trajectory.

[0020] Preferably, retainers are arranged on the radial outer side and the radial inner side of the first rolling body and the radial outer side and the radial inner side of the second rolling body. Accordingly, the first rolling body and the second rolling body can be kept in a suitable position to ensure that the rotation of the rotating ring is accurately converted into the axial movement of the first moving ring and the first release bearing and the second moving ring and the second release bearing. Moreover, the retainer is integrally formed on at least one of the rotating ring, the first moving ring and the second moving ring. The first rolling body and the second rolling body can be constrained in a precise position relative to the rotating ring, the first moving ring and the second moving ring.

[0021] Preferably, the second movable ring is axially movably mounted on the first movable ring via a spline structure, thereby ensuring the flexibility of the second movable ring and the first movable ring in relative axial movement and preventing the two from rotating in the circumferential direction relative to each other.

[0022] Preferably, for ease of control, the motor drives the rotating ring to rotate via a gear transmission mechanism or a worm gear transmission mechanism, thereby accurately controlling the rotation angle of the rotating ring and the axial movement stroke of the release bearing, and accurately controlling the clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic axial section diagram of an electric drive clutch actuator according to Embodiment 1 of the utility model;

[0024] Figure 2 for Figure 1 A schematic diagram of the first release bearing after being moved to the right by the pushing mechanism;

[0025] Figure 3 It is a schematic diagram of a rotating ring of Example 1 of the utility model;

[0026] Figure 4 It is a schematic diagram of the first moving ring of Example 1 of the utility model;

[0027] Figure 5 for Figure 1 A schematic diagram of the positional relationship between the rotating ring and the first moving ring in the state shown;

[0028] Figure 6 For the first moving ring Figure 1 The position shown is Figure 2 Schematic diagram of en route positions for movement between the indicated positions;

[0029] Figure 7 for Figure 2 A schematic diagram of the positional relationship between the rotating ring and the first moving ring in the state shown;

[0030] Figure 8 This is a schematic axial section diagram of an electric-driven clutch actuator according to Embodiment 2 of the present utility model;

[0031] Fig. 9 It is a schematic diagram of a rotating ring of Embodiment 2 of the present utility model;

[0032] Fig.10 It is a schematic diagram of the first moving ring of Example 2 of the utility model;

[0033] Fig.11 This is a schematic diagram of the second moving ring of Embodiment 2 of the present utility model;

[0034] Fig.12 This is a schematic diagram of the first moving ring of Example 3 of the utility model;

[0035] Fig.13 This is a schematic diagram of the second moving ring of Embodiment 3 of the present utility model;

[0036] Description of the numbers in the figure:

[0037] 100 bases,

[0038] 110 Installation Department,

[0039] 120 sleeve, 121 first end, 122 second end, 123 first keyway;

[0040] 200 thrust bearing;

[0041] 300 driving agencies,

[0042] 310 rotating ring, 311 first axial undulating surface, 312 first blocking portion, 313 third axial undulating surface, 314 third blocking portion, 315 bottom surface, 316 first raised portion, 317 third raised portion,

[0043] 320 first rolling element,

[0044] 330 first moving ring, 331 second axial undulating surface, 332 second blocking portion, 333 bottom surface, 334 first key tooth, 335 second key groove, 336 second raised portion,

[0045] 340 second moving ring, 341 fourth axial undulating surface, 342 fourth blocking portion, 343 bottom surface, 344 second key teeth, 345 fourth raised portion,

[0046] 350 second rolling element;

[0047] 410 a first release bearing, 420 a second release bearing;

[0048] 510 first retaining frame, 520 second retaining frame, 530 third retaining frame;

[0049] 610 worm wheel, 620 worm. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0051] The terms "including" and "having" and any variations thereof in the specification and claims of the present utility model are intended to cover non-exclusive inclusions. For example, a method or product comprising a series of technical features is not necessarily limited to those technical features clearly listed, but may also include other technical features that are not clearly listed and can be included in the method or product.

[0052] In the description of the present utility model, it is necessary to understand that the technical features defined by the terms "first", "second", "third", "fourth" and the like with sequential concepts are only for the purpose of clearly describing the defined technical features so that the defined technical features can be clearly distinguished from other technical features, and do not represent such naming in actual implementation, and therefore cannot be understood as a limitation of the present utility model.

[0053] The present invention is described in detail below in conjunction with specific embodiments and drawings.

[0054] Example 1

[0055] like Figure 1-2As shown, the electric clutch actuator includes a base 100 , a thrust bearing 200 , a pushing mechanism 300 and a first release bearing 410 .

[0056] The base 100 is made in one piece and has a mounting portion 110 and a sleeve 120. The sleeve 120 extends axially and has a first end 121 and a second end 122 in the axial direction. The mounting portion 110 is connected to the sleeve 120 at the first end and extends radially to present a flange shape.

[0057] The thrust bearing 200 is rotatably mounted on the radially outer side of the sleeve 120 . The left side of the thrust bearing 200 is supported by the right side surface of the mounting portion 110 and can rotate relative to the right side surface of the mounting portion.

[0058] The pushing mechanism 300 includes a rotating ring 310 , a first rolling body 320 , and a first moving ring 330 , which are sequentially distributed from left to right in a direction away from the mounting portion.

[0059] The rotating ring 310 is rotatably mounted on the radial outer side of the sleeve 120 and relies on the thrust bearing 200. The rotating ring 310 is driven to rotate by a motor. Specifically, the motor not shown in the figure drives the rotating ring to rotate via a worm gear transmission mechanism. The worm gear transmission mechanism shown in the figure includes a meshing worm 620 and a worm wheel 610. The worm is directly or indirectly connected to the output shaft of the motor, and the worm wheel 610 is arranged on the periphery of the rotating wheel 310. Therefore, the rotation of the motor is converted into the rotation of the rotating wheel through the worm gear mechanism. In order to accurately control the rotation angle of the rotating wheel, the motor is preferably a servo motor. The distribution angle of the worm wheel on the periphery of the rotating wheel is adapted to the rotation angle of the rotating wheel. In this embodiment, the rotating wheel only reciprocates within a certain angle range, so the worm wheel is only distributed on a part of the circumference of the rotating ring. In other embodiments, the worm gear transmission structure can be replaced by a gear transmission mechanism. The rotating ring 310 is provided with a first axial undulating surface 311 extending circumferentially and facing the second end of the sleeve in the assembled state. As shown Figure 3 As shown in FIG. 1 , the upper side plane of the rotating ring 310 is used as the bottom surface 315 and a first arc-shaped protrusion 316 is provided on the bottom surface. The axial height of the first protrusion 316 gradually increases in the clockwise direction, and the upward surface of the first protrusion forms a first axial undulating surface 311. The circumferential extension refers to the first axial undulating surface as shown in FIG. Figure 3 The first axial undulating surface faces the second end of the sleeve in the assembled state. Figure 3 In the structure shown, six concentric first raised portions 316 and six first axial undulating surfaces 311 formed by the first raised portions are evenly distributed on the circumference.

[0060] The first movable ring 330 is axially movable and sleeved on the radial outer side of the sleeve 120 via a spline structure and is located on the right side of the rotating ring 310. Figure 4 As shown in FIG. 1 , three first key teeth 334 are provided on the radial inner edge of the first moving ring 330. Figure 1-2 As shown, three first key grooves 123 are provided on the outer circumferential surface of the sleeve. When the first movable ring is sleeved on the radial outer side of the sleeve, the first key teeth 334 are located in the corresponding first key grooves 123 to form a spline fit. The first movable ring 330 is provided with a second axial undulating surface 331 extending circumferentially and facing the first end of the sleeve. The second axial undulating surface 331 is formed in the same manner as the first axial undulating surface but in a different direction. Figure 4 In the structure shown, six second protrusions 336 and six second axial undulating surfaces 331 formed by the second protrusions are evenly distributed on the circumference. The axial height of the six second protrusions gradually increases in the clockwise direction. Figure 3 The upper side plane of the rotating ring as its bottom surface 315 faces rightward, and Figure 4 The upper side plane of the first moving ring as shown is facing the left side as its bottom surface 333, which will make the second axial undulating surface 331 axially opposite to the first axial undulating surface 311 and the undulating directions along the circumferential direction opposite.

[0061] The first rolling body 320 is located between the first axial undulating surface 311 and the second axial undulating surface 331 which are axially opposite to each other, so as to convert the rotation of the rotating ring into the axial movement of the first moving ring. Figure 3 , Figure 5-7 As shown in FIG. 1 , a first blocking portion 312 is provided at the highest point of the first axial undulating surface 311. Figure 4-7 As shown, a second blocking portion 332 is provided at the highest point of the second axial undulating surface 331 .

[0062] exist Figure 1-2 In the embodiment, the first retaining frame 510 is arranged radially inside the first rolling body 320, and the second retaining frame 520 is arranged radially outside the first rolling body 320. The first rolling body is kept in its working position under the constraints of the first retaining frame and the second retaining frame. Figure 3 As shown, the first retainer 510 is integrally formed on the rotating ring. In other embodiments, the first retainer and the second retainer can be integrally formed on the rotating ring or the first moving ring, or the first retainer and the second retainer can be separately integrally formed on the rotating ring and the first moving ring.

[0063] like Figure 5-7As shown, it is a model in which the first axial undulating surface 311 of the rotating ring 310 and the second axial undulating surface 331 of the first moving ring 330 are unfolded on a plane, which is equivalent to the situation in which the arc shapes of the first axial undulating surface 311 and the second axial undulating surface 331 are flattened along a straight line. Figure 5-7 The left and right directions in the figure express the rotation angle of the rotating ring relative to the first moving ring. Figure 5-7 The up and down directions in the figure express the axial movement distance of the first movable ring relative to the rotating ring. Figure 5-7 In the figure, the distribution angles are marked on the rotating ring 310 and the first moving ring 330. Since the rotating ring 310 and the first moving ring 330 are both circular, in the case of full expression, the rotating ring and the first moving ring will be distributed 360°, and the figure only represents a part. Among them, the marked angles are only used to illustrate the position change of the rotating ring and the first moving ring, and these angles may not be marked on the specific product.

[0064] like Figure 5 As shown, the first rolling body 320 contacts the bottom surface 315 of the rotating ring and the bottom surface 333 of the first moving ring. At this time, the axial distance S1 between the rotating ring and the first moving ring is the shortest. The first moving ring 330 is located at Figure 1 Position shown.

[0065] from Figure 5 The status shown will Figure 3 The rotating ring 310 shown rotates counterclockwise, which is equivalent to Figure 5 The rotating ring 310 in the embodiment moves upward, and the first rolling body 320 rolls Figure 6 As shown, the first axial undulating surface 311 and the second axial undulating surface 331 are climbed, and at this time, the axial distance S2 between the rotating ring 310 and the first moving ring 330 increases.

[0066] from Figure 6 The status shown will continue Figure 3 Turning the rotating ring counterclockwise is equivalent to turning Figure 6 The rotating ring 310 in the embodiment continues to move upward, and the first rolling body 320 rolls Figure 7 As shown in FIG. 1 , the first movable ring 330 climbs to the highest point between the first axial undulating surface 311 and the second axial undulating surface 331. At this time, the axial distance S3 between the rotating ring 310 and the first movable ring 330 is the largest. Figure 2 Position shown.

[0067] On the contrary, from Figure 7 The status shown will Figure 3 Turning the rotating ring clockwise is equivalent to turning Figure 7 The rotating ring 310 in the middle continues to move downward, and the positions of the rotating ring 310 and the first moving ring 330 will be Figure 6The status shown has been reached Figure 5 In the state shown, the first moving ring 330 will also move from Figure 2 Arrive at the indicated location Figure 1 Position shown.

[0068] The first release bearing 410 is assembled to the first movable ring 330, so it can move axially with the first movable ring to control the clutch. In the installed use state, the first release bearing 410 and the first movable ring 330 are subjected to the left axial force from the clutch. When the rotating ring is rotated, the first axial undulating surface of the rotating ring overcomes the left axial force from the clutch when the axial thrust applied to the second axial undulating surface by the first rolling body overcomes the left axial force from the clutch, and the first release bearing moves to the right. When the rotating ring is rotated in the opposite direction, the first axial undulating surface of the rotating ring is reset, and the left axial elastic force from the clutch causes the first movable ring and the first release bearing to move to the left.

[0069] Example 2

[0070] like Figure 8 As shown, compared with Example 1, the electric drive clutch actuator of this embodiment has the following structure added on the basis of Example 1:

[0071] like Fig. 9 As shown, the rotating ring 310 is provided with a third axial undulating surface 313 extending circumferentially and facing the second end of the sleeve in the assembled state, and the third axial undulating surface 313 is coaxial with the first axial undulating surface 311 and is located radially outside the first axial undulating surface. Specifically, the upper side plane of the rotating ring 310 serves as its bottom surface 315 and 6 arc-shaped third protrusions 317 are evenly distributed on the bottom surface along the circumference, and the axial height of the third protrusion 317 gradually decreases in the clockwise direction, so that the third axial undulating surface 313 formed by the third protrusion 317 is opposite to the undulating direction of the first axial undulating surface 311 along the circumferential direction.

[0072] The second moving ring 340 is mounted on the radial outer side of the first moving ring 330 so as to be axially movable. Fig.10 As shown in FIG. 1 , three second key grooves 335 are provided on the radial outer edge of the first moving ring 330. Fig.11 As shown, three second key teeth 344 are provided on the radial inner edge of the second movable ring 340. When the second movable ring is sleeved on the radial outer side of the first movable ring, the second key teeth 344 are located in the corresponding second key grooves 335 to form a spline fit.

[0073] The second moving ring 340 is provided with a fourth axial undulating surface 341 extending circumferentially and facing the first end of the sleeve in the assembled state. The fourth axial undulating surface 341 is formed in the same manner as the second axial undulating surface but in a different direction. Fig.11In the structure shown, six fourth protrusions 345 and six fourth axial undulating surfaces 341 formed by the fourth protrusions are evenly distributed on the circumference. The axial height of the six fourth protrusions gradually decreases in the clockwise direction, so that the fourth axial undulating surface 341 and the second axial undulating surface 331 have opposite circumferential undulation directions.

[0074] In the assembled state, the fourth axial undulating surface 341 is axially opposite to the third axial undulating surface 313 and has opposite circumferential undulating directions, and the second rolling body 350 is distributed between the third axial undulating surface 313 and the fourth axial undulating surface 341 to convert the rotation of the rotating ring into the axial movement of the second moving ring. In addition, the third blocking portion 314 is provided at the highest point of the third axial undulating surface 313, and the fourth blocking portion 342 is provided at the highest point of the fourth axial undulating surface 341.

[0075] The second moving ring 340 is equipped with a second release bearing 420 that moves axially therewith, and the second release bearing 420 is located axially outside the first release bearing 410 .

[0076] According to the structure of this embodiment, when the rotating ring 310 rotates, the moving direction of the first moving ring 330 is the same as that of the embodiment 1, while the moving direction of the second moving ring 340 is opposite to that of the first moving ring 330. Accordingly, when the rotating ring 310 is rotated counterclockwise to make the first moving ring 330 move rightward with the first release bearing 410, the second release shaft 420 pushes the second moving ring 340 to move leftward under the reaction of the clutch elastic force; when the rotating ring 310 is rotated clockwise to make the second moving ring 340 move rightward with the second release bearing 420, the first release shaft 410 pushes the first moving ring 330 to move leftward under the reaction of the clutch elastic force. In this way, the first release bearing 410 and the second release bearing 420 alternately move to continuously and accurately control the engagement and separation of the inner and outer layers of different clutches.

[0077] In this embodiment, the third retaining frame 530 is configured radially outside the second rolling element 350 , and accordingly, the second rolling element 350 is retained in its working position under the constraint of the second retaining frame 520 and the third retaining frame 530 .

[0078] Example 3

[0079] like Figure 12-13 As shown, the electric drive clutch actuator of this embodiment is different from that of embodiment 2 only in the arrangement of the retaining frame. In this embodiment, the second retaining frame 520 is integrally formed on the outer periphery of the first moving ring 310 and extends to the left in the assembled state, and the third retaining frame 530 is integrally formed on the outer periphery of the second moving ring 340 and extends to the left in the assembled state.

[0080] In other embodiments, the retaining frame can be integrally formed on at least one of the rotating ring, the first movable ring and the second movable ring according to the specific structure. For example, on the basis of Example 2, the first retaining frame is integrally formed on the rotating ring, or the first retaining frame, the second retaining frame and the third retaining frame are all integrally formed on the rotating ring, which are not listed one by one.

[0081] The remaining structures of this embodiment are the same as those of Embodiment 2 and will not be described in detail.

Claims

1. Electric clutch actuator, characterized by include: A base (100) comprises a mounting portion (110) and a sleeve (120), wherein the sleeve (120) extends axially and has a first end (121) and a second end (122) in the axial direction, and the mounting portion (110) is connected to the sleeve at the first end (121) and extends radially; A thrust bearing (200) is rotatably mounted on the radially outer side of the sleeve (120) and relies on the mounting portion (110); The pushing mechanism (300) comprises a rotating ring (310), a first rolling body (320) and a first moving ring (330) which are sequentially distributed along the axial direction away from the mounting portion; the rotating ring (310) is rotatably mounted on the radial outer side of the sleeve (120) and relies on the thrust bearing (200); the rotating ring (310) can be driven to rotate by a motor driving mechanism; the rotating ring (310) is provided with a first axial undulating surface (311) extending circumferentially and facing the second end of the sleeve; the first moving ring (330) can be axially The first movable ring (330) is movably sleeved on the radial outer side of the sleeve (120), and is provided with a second axial undulating surface (331) extending circumferentially and facing the first end of the sleeve, and the second axial undulating surface (331) is axially opposite to the first axial undulating surface (311) and has opposite circumferential undulating directions; the first rolling body (320) is located between the first axial undulating surface (311) and the second axial undulating surface (331) to convert the rotation of the rotating ring (310) into the axial movement of the first movable ring (330); A first release bearing (410) is assembled to the first moving ring (330) so as to move axially along with the first moving ring.

2. The electric clutch actuator according to claim 1 is characterized in that: The same number of first axial undulating surfaces (311) and second axial undulating surfaces (331) are evenly distributed and concentrically arranged along the circumference.

3. The electric clutch actuator according to claim 2 is characterized in that: A first blocking portion (312) is provided at the highest point of the first axial undulating surface (311), and a second blocking portion (332) is provided at the highest point of the second axial undulating surface (331).

4. The electrically driven clutch actuator according to claim 1, 2 or 3, characterized in that: A retaining frame is arranged on the radial outer side and the radial inner side of the first rolling body (320).

5. The electrically driven clutch actuator according to claim 4, characterized in that: The retaining frame is integrally formed on the rotating ring (310) or / and the first movable ring (330).

6. The electrically driven clutch actuator according to claim 1, 2 or 3, characterized in that: The first movable ring (330) is axially movably sleeved on the radial outer side of the sleeve (120) via a spline structure.

7. The electrically driven clutch actuator according to claim 1, 2 or 3, characterized in that: The rotating ring (310) is provided with a third axial undulating surface (313) extending circumferentially and facing the second end of the sleeve, the third axial undulating surface (313) is coaxial with the first axial undulating surface (311) and is located radially outside the first axial undulating surface, and the third axial undulating surface (313) and the first axial undulating surface (311) have undulating directions in the circumferential direction opposite to each other; The radial outer side of the first movable ring (330) is axially movably sleeved with a second movable ring (340), the second movable ring (340) being provided with a fourth axial undulating surface (341) extending circumferentially and facing the first end of the sleeve, the fourth axial undulating surface (341) having an undulating direction opposite to that of the second axial undulating surface (331) along the circumferential direction; The third axial undulating surface (313) and the fourth axial undulating surface (341) are axially opposite to each other and have opposite undulating directions along the circumferential direction; a second rolling body (350) is distributed between the third axial undulating surface and the fourth axial undulating surface to convert the rotation of the rotating ring (310) into the axial movement of the second moving ring (340); The second moving ring (340) is equipped with a second release bearing (420) that moves axially together with the second moving ring, and the second release bearing (420) is located axially outside the first release bearing (410).

8. The electrically driven clutch actuator according to claim 7, characterized in that: A third blocking portion (314) is provided at the highest point of the third axial undulating surface (313), and a fourth blocking portion (342) is provided at the highest point of the fourth axial undulating surface (341).

9. The electrically driven clutch actuator according to claim 7, characterized in that: Retaining frames are arranged on the radial outer side and the radial inner side of the first rolling body (320) and the radial outer side and the radial inner side of the second rolling body (350).

10. The electrically driven clutch actuator according to claim 9, characterized in that: The retaining frame is integrally formed on at least one of the rotating ring (310), the first moving ring (330) and the second moving ring (340).

11. The electrically driven clutch actuator according to claim 7, characterized in that: The second movable ring (340) is axially movably sleeved on the radial outer side of the first movable ring (330) via a spline structure.

12. The electric clutch actuator according to claim 1, 2 or 3, characterized in that: The motor drives the rotating ring (310) to rotate forward or reverse via a gear transmission mechanism or a worm gear transmission mechanism.

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