Unlocking device, electric suction actuator and electric suction door

Abstract

The present invention discloses an unlocking device, an electric suction actuator and an electric suction door, wherein the unlocking device comprises: a lock bolt; a cam, a follower that contacts and cooperates with the cam is provided on the lock bolt; a first driving mechanism; a first pull rope; and a second pull rope. This unlocking device drives the lock bolt to move back and forth linearly through the contact and cooperation between the cam and the follower, thereby locking or unlocking the locked part. The cam can be driven to rotate electrically by a first motor, or the pull rope can be pulled, wherein pulling the first pull rope drives the cam to rotate forward by an angle, which can drive the lock bolt to move and unlock, and pulling the second pull rope drives the cam to reverse by an angle, which drives the lock bolt to reset and re-lock the locked part. Therefore, the lock bolt can lock or unlock the locked part by an electric or manual method, and has strong flexibility. Even if one of the methods fails and cannot be unlocked, another method can still be used to unlock, and safety is guaranteed. This invention is used in the field of electric suction doors.

Description

Technical Field

[0001] The present invention relates to the field of electric suction doors, and in particular to an unlocking device, an electric suction actuator and an electric suction door. Background Art

[0002] With the development of the automobile industry and the motor industry, people's comprehensive demand for automobiles is getting higher and higher. More and more electric equipment and electronic equipment are installed on modern cars, and they are gradually moving towards intelligence. Among them, electric tailgates, electric front trunks, electric self-priming doors, etc. make users' experience of opening and closing doors more convenient and comfortable.

[0003] The existing electric suction actuators of automobile door locks have the following problems: (1) The structure is simple and the safety is low. Once a fault occurs, it is easy to cause the automobile electric suction door lock to be unable to be opened after being locked, and the electric suction door can only be unlocked through a single way; (2) The integration is high, the versatility is poor, and the scope of application is small. Generally, it can only be used for a specific car or a certain door structure; (3) The electronic control logic is simple and the flexibility is poor. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide an unlocking device and an electric suction actuator, which can be unlocked in a variety of ways and have strong flexibility.

[0005] The present invention also provides an electric suction door, comprising the above-mentioned electric suction actuator.

[0006] According to a first aspect of the present invention, there is provided an unlocking device, comprising:

[0007] Lock bolt;

[0008] A cam, wherein the lock bolt is provided with a follower that contacts and cooperates with the cam, and the cam is used to drive the follower to move back and forth in a straight line so that the lock bolt locks or unlocks the locked object;

[0009] A first driving mechanism, the first driving mechanism is used to drive the cam to rotate, and the first driving mechanism includes a first motor;

[0010] A first pull rope, the cam is directly or indirectly connected to the first pull rope, and pulling the first pull rope can drive the cam to rotate forward; and

[0011] A second pull rope, the cam is directly or indirectly connected to the second pull rope, and pulling the second pull rope can drive the cam to reverse.

[0012] The above-mentioned unlocking device has at least the following beneficial effects: the contact and cooperation between the cam and the follower drives the locking bolt to move back and forth in a straight line, thereby realizing locking or unlocking the locked part, and driving the cam to rotate can be electrically driven by the first motor, or manually pulling the pull rope, wherein pulling the first pull rope drives the cam to rotate forward by an angle, which can drive the locking bolt to move and realize unlocking, and pulling the second pull rope drives the cam to reverse by an angle, which drives the locking bolt to reset and realize re-locking of the locked part. Therefore, the locking bolt can lock or unlock the locked part by electric or manual means, and has strong flexibility. Even if one of the methods fails, such as the first motor loses power and cannot unlock, another method can still be used to unlock, so safety is guaranteed.

[0013] According to the unlocking device described in the embodiment of the first aspect of the present invention, the cam has a valley portion, the cam has a smooth transition at one end of the valley portion, and the cam has a radial vertical transition at the other end of the valley portion. In the radial vertical transition portion, the follower cannot pass over, thereby blocking the cam from rotating, limiting the position of the cam, and preventing the second pull rope from being pulled, so that the cam rotates beyond a predetermined angle or the valley portion when the lock bolt is reset, resulting in failure to reset.

[0014] According to the unlocking device described in the embodiment of the first aspect of the present invention, the first driving mechanism also includes a first gear and a first worm, the first worm cooperates with the first gear, the first motor is used to drive the first worm, the unfolded helical angle of the first worm is not less than the friction angle of the first worm and the first gear, the first gear is fixedly connected to the cam, and the rotation of the first gear can drive the cam to rotate. The use of worm transmission makes the structure more compact, and the transmission cooperation between the first worm and the first gear does not have a self-locking condition, so it is easy to pull the first pull rope or the second pull rope, avoiding the worm transmission from limiting the pull rope action.

[0015] According to the unlocking device described in the embodiment of the first aspect of the present invention, the unlocking device further includes a torsion spring, one end of which is fixedly arranged, and the other end of which is fixedly connected to the cam or the first gear. After unlocking, when the lock bolt is reset, the torsion spring can realize mechanical automatic reset, so that the lock bolt can re-lock the locked object.

[0016] According to a second aspect of the present invention, there is provided an electric suction actuator, comprising an electric suction component and the unlocking device described above, wherein the electric suction component comprises:

[0017] Several planetary gears;

[0018] A gear ring, each of the planetary gears meshes with the inner teeth of the gear ring, the gear ring is provided with a slot that can be engaged with the lock bolt of the unlocking device, the lock bolt has a first position and a second position under the drive of the cam, the lock bolt is engaged with the slot in the first position, and the lock bolt is disengaged from the slot in the second position to release the gear ring from the constraint of the lock bolt;

[0019] A sun gear, each of the planetary gears is arranged around the sun gear, and each of the planetary gears is meshed with the sun gear;

[0020] A second driving mechanism, the second driving mechanism is used to drive the sun gear to rotate, and the second driving mechanism includes a second motor;

[0021] a planet carrier, each of the planetary gears being hinged to the planet carrier respectively; and

[0022] An electric suction pull rope is connected to the planetary frame, and the electric suction pull rope can be pulled or released by rotating the planetary frame.

[0023] The above-mentioned electric suction actuator has at least the following beneficial effects: under normal working conditions, the lock bolt of the unlocking device is engaged with the slot of the gear ring to lock the gear ring; when the electric suction component fails, the lock bolt is controlled to disengage from the slot to release the lock of the gear ring; at this time, the electric suction pull rope can be pulled to release the electric suction pull rope so that the electric suction door can be opened; the lock bolt can be unlocked electrically or manually, with strong flexibility; even if one of the methods fails, such as the first motor loses power and cannot be unlocked, another method can still be used to unlock, and safety is guaranteed.

[0024] According to the electric suction actuator described in the second embodiment of the present invention, the second driving mechanism also includes a second gear and a second worm, the second worm cooperates with the second gear, the second motor is used to drive the second worm, the unfolded helix angle of the second worm is less than the friction angle of the second worm and the second gear, the second gear is fixedly connected to the sun gear, and the rotation of the second gear can drive the sun gear to rotate. The use of worm transmission makes the structure more compact, and the transmission cooperation between the second worm and the second gear has a self-locking condition to ensure that the electric suction component can maintain the state of the second motor when the output is terminated.

[0025] According to the electric suction actuator described in the embodiment of the second aspect of the present invention, the electric suction actuator further includes a limit switch, and a first protrusion is provided on the gear ring, and when the first protrusion contacts the limit switch, the lock bolt is engaged with the card slot. The limit switch detects the first protrusion to determine whether the lock bolt is in a locked state or an unlocked state.

[0026] According to the electric suction actuator described in the embodiment of the second aspect of the present invention, the electric suction actuator also includes a fixed limiting protrusion, and a second protrusion is provided on the planetary carrier, and the limiting protrusion is used to prevent the planetary carrier and the second protrusion from rotating beyond a predetermined angle.

[0027] According to the electric suction actuator described in the embodiment of the second aspect of the present invention, the electric suction actuator also includes an upper cover and a base, the upper cover and the base are connected to form a cavity for accommodating the electric suction assembly and the unlocking device, the planetary carrier, the ring gear, the sun gear and the cam are coaxially arranged, the installation is convenient, and the overall structure is compact.

[0028] According to a third aspect of the present invention, there is provided an electric suction door, comprising the above-mentioned electric suction actuator.

[0029] The above-mentioned electric suction door has at least the following beneficial effects: when the electric suction component of the electric suction actuator fails and the electric suction door lock is locked and cannot be opened, the gear ring of the electric suction component can be unlocked by means of an unlocking device, and the electric suction pull rope can be released, so that the electric suction door lock and the electric suction door can be opened. The unlocking device can be unlocked electrically or manually, and has strong flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with the accompanying drawings:

[0031] Figure 1 Schematic diagram of the external structure of the electric suction actuator according to an embodiment of the present invention;

[0032] Figure 2 is an exploded schematic diagram of an electric suction actuator according to an embodiment of the present invention;

[0033] Figure 3 1 is a schematic diagram of the assembly of a planet carrier and a planetary gear according to an embodiment of the present invention;

[0034] Figure 4 is a schematic structural diagram of a locking bolt locking a gear ring according to an embodiment of the present invention;

[0035] Figure 5 is a schematic structural diagram of a locking bolt releasing the locking of the gear ring according to an embodiment of the present invention;

[0036] Figure 6 It is a schematic diagram of the structure of tightening the electric suction pull rope according to an embodiment of the present invention;

[0037] Figure 7 It is a structural schematic diagram of releasing the electric suction pull rope according to an embodiment of the present invention;

[0038] Figure 8 is a front structural schematic diagram of the unlocking device in a state where the locking bolt releases the locking of the gear ring according to an embodiment of the present invention;

[0039] Fig. 9 is a schematic diagram of the back structure of the unlocking device in a state where the locking bolt releases the locking of the gear ring according to an embodiment of the present invention;

[0040] Fig.10 is a front structural schematic diagram of the unlocking device in a state where the lock bolt locks the gear ring according to an embodiment of the present invention;

[0041] Fig.11 is a schematic diagram of the back structure of the unlocking device in a state where the lock bolt locks the gear ring according to an embodiment of the present invention;

[0042] Figure numerals: electric suction assembly 100, planetary gear 110, ring gear 120, slot 121, first protrusion 122, sun gear 130, planetary carrier 140, second drive mechanism 150, second motor 151, second gear 152, second worm 153, electric suction pull rope 160, upper cover 170, base 180, limit switch 181, column 190, unlocking device 200, bolt 210, follower 211, cam 220, valley part 221, first drive mechanism 230, first motor 231, first gear 232, first worm 233, first pull rope 240, second pull rope 250, fixed seat 260, compression spring 270, torsion spring 280. DETAILED DESCRIPTION

[0043] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0044] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0046] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0047] Reference Figure 1 and Figure 2 The embodiment of the present invention provides an electric suction actuator, including an electric suction component 100 and an unlocking device 200, wherein the electric suction component 100 adopts a planetary gear transmission mechanism, the electric suction component 100 includes a plurality of planetary gears 110, a ring gear 120, a sun gear 130, a planet carrier 140, a second driving mechanism 150 and an electric suction pull rope 160, each planetary gear 110 is meshed with the inner teeth of the ring gear 120, each planetary gear 110 is arranged around the sun gear 130, each planetary gear 110 is meshed with the sun gear 130, each planetary gear 110 is respectively hinged to the planet carrier 140, the second driving mechanism 150 drives the sun gear 130 to rotate, the second driving mechanism 150 includes a second motor 151, the electric suction pull rope 160 is connected to the planet carrier 140, and the rotation of the planet carrier 140 can pull or release the electric suction pull rope 160, wherein a card slot 121 is provided on the ring gear 120.

[0048] It can be understood that the second driving mechanism 150 drives the sun gear 130 to rotate, and the second motor 151 is used as a power source, which can drive the sun gear 130 in a direct driving manner or through different transmission mechanisms. In this embodiment, the second driving mechanism 150 also includes a second gear 152 and a second worm 153. The second worm 153 is in transmission cooperation with the second gear 152. The second motor 151 drives the second worm 153, thereby driving the second gear 152 to rotate. The second gear 152 is fixedly connected to the sun gear 130, and the rotation of the second gear 152 drives the sun gear 130 to rotate. The use of worm transmission makes the structure more compact.

[0049] Reference Figure 3 In this embodiment, there are three planetary gears 110, which are respectively installed on three shafts on the planetary carrier 140. Under the action of the sun gear 130, the planetary gear 110 rotates around the axis hinged to the planetary carrier 140, and revolves around the sun gear 130, thereby driving the planetary carrier 140 to rotate.

[0050] In the electric suction actuator of this embodiment, in the normal working state, the lock bolt 210 of the unlocking device 200 is engaged with the slot 121 on the ring gear 120, locking the ring gear 120 so that the ring gear 120 cannot rotate. Figure 4The second motor 151 rotates, driving the second worm 153 to rotate, and then driving the second gear 152 and the sun gear 130 to rotate. The rotation of the sun gear 130 drives the planetary gears 110 to rotate and revolve, and then drives the planetary carrier 140 to rotate. Finally, the planetary carrier 140 drives the electric suction rope 160 to move. Figure 6 When the second motor 151 rotates forward, it drives the planetary frame 140 to rotate counterclockwise, pulling the electric suction rope 160 to the left to tighten the electric suction rope 160; Figure 7 When the second motor 151 rotates in the reverse direction, it drives the planetary frame 140 to rotate clockwise, and releases the electric suction rope 160 to the right.

[0051] In this embodiment, the unfolded helix angle of the second worm 153 is smaller than the friction angle of the second worm 153 in contact with the second gear 152, that is, the worm has a self-locking condition to ensure that the electric suction component 100 can maintain the state of the second motor 151 when the output is terminated, and avoid loosening when the electric suction rope 160 is tightened. Specifically, the second worm 153 adopts a double-headed worm.

[0052] The electric suction pull rope 160 is in a tensioned state. When the electric suction assembly 100 fails, such as the second motor 151 loses power, the second worm 153, the second gear 152 and the sun gear 130 cannot rotate, and the electric suction pull rope 160 is always in a tensioned state. The electric suction door lock cannot be opened. At this time, the locking bolt 210 on the gear ring 120 can be released by the unlocking device 200, so that the locking bolt 210 is disengaged from the slot 121 on the gear ring 120, and the gear ring 120 can rotate freely. Figure 5 , so that the planet carrier 140 is not constrained, so as to release the electric suction pull rope 160, and the external force can pull the electric suction pull rope 160.

[0053] Reference Figures 8 to 11 In this embodiment, the unlocking device 200 includes a lock bolt 210 , a cam 220 , a first driving mechanism 230 , a first pull rope 240 and a second pull rope 250 . The lock bolt 210 is provided with a follower 211 which contacts and cooperates with the cam 220. The rotation of the cam 220 can drive the follower 211 and the lock bolt 210 to reciprocate linearly to lock or unlock the locked member. The gear ring 120 is the locked member. The lock bolt 210 can be engaged with the slot 121 on the gear ring 120. The lock bolt 210 has a first position and a second position driven by the cam 220. The lock bolt 210 is engaged with the slot 121 in the first position, and the lock bolt 210 is separated from the slot 121 in the second position. The first driving mechanism 230 drives the cam 220 to rotate. The first driving mechanism 230 includes a first motor 231. The cam 220 is directly or indirectly connected to the first pull rope 240. Pulling the first pull rope 240 can drive the cam 220 to rotate forward (in this embodiment, counterclockwise rotation is forward rotation, and counterclockwise rotation is reverse rotation). Figure 8The cam 220 is directly or indirectly connected to the second pull rope 250, and pulling the second pull rope 250 can drive the cam 220 to reverse.

[0054] It is understandable that the first driving mechanism 230 drives the cam 220 to rotate, and the first motor 231 is used as a power source, which can drive the cam 220 in a direct driving manner or through different transmission mechanisms. In some embodiments, the first driving mechanism 230 also includes a first gear 232 and a first worm 233. The first worm 233 and the first gear 232 are in transmission cooperation. The first motor 231 drives the first worm 233, and the first gear 232 is fixedly connected to the cam 220. The rotation of the first gear 232 can drive the cam 220 to rotate. The use of worm transmission makes the structure more compact.

[0055] In this embodiment, the unfolded helix angle of the first worm 233 is not less than the friction angle of the first worm 233 in contact with the first gear 232, that is, the first worm 233 does not have a self-locking condition. Specifically, the first worm 233 adopts a four-head worm, which facilitates pulling the first pull rope 240 or the second pull rope 250, avoiding the worm transmission from limiting the pull rope action.

[0056] The cam 220 is fixedly connected to the first gear 232. The two can be made as one piece or made separately and then connected. In this embodiment, the cam 220 and the first gear 232 are made as one piece. The cam 220 is processed at the bottom of the first gear 232. The cam 220 has a valley portion 221. Fig.11 , when the follower 211 contacts the valley portion 221 of the cam 220, the lock bolt 210 is in the first position, and the lock bolt 210 is engaged with the slot 121 on the gear ring 120; Fig. 9 The cam 220 rotates, driving the follower 211 and the lock bolt 210 to move. When the follower 211 contacts the non-trough portion of the cam 220, the lock bolt 210 is in the second position, and the lock bolt 210 is disengaged from the slot 121 to achieve unlocking. The first pull rope 240 and the second pull rope 250 are connected to the first gear 232 respectively.

[0057] Specifically, the follower 211 and the cam 220 can be in contact with each other by applying elastic force to the follower 211. In some embodiments, a fixing seat 260 is provided, and a compression spring 270 is provided between the fixing seat 260 and the lock bolt 210. The compression spring 270 applies elastic force to the lock bolt 210 and the follower 211, so that the follower 211 and the cam 220 are kept in contact.

[0058] The unlocking device 200 of this embodiment drives the bolt 210 to reciprocate linearly through the contact and cooperation between the cam 220 and the follower 211, thereby locking or unlocking the ring gear 120. The cam 220 can be driven to rotate electrically by the first motor 231, or manually by pulling the pull rope. When driven by the first motor 231, the first motor 231 drives the first worm 233 to rotate, and the first worm 233 drives the first gear 232 and the cam 220 to rotate, thereby driving the bolt 210 to move. When the manual method is adopted, refer to Figure 8 and Fig. 9 , pulling the first pull rope 240 drives the cam 220 to rotate forward by an angle, which can drive the lock bolt 210 to move and achieve unlocking; Fig.10 and Fig.11 , pulling the second pull rope 250 drives the cam 220 to reverse an angle, which can drive the lock bolt 210 to reset and realize re-locking the gear ring 120.

[0059] Therefore, the unlocking device 200 of this embodiment can lock or unlock the locked element by the lock bolt 210 electrically or manually, with high flexibility. Even if one of the methods fails, such as the first motor 231 loses power and cannot be unlocked, another method can still be used to unlock, which is highly safe and easy to operate.

[0060] In some embodiments, one end of the cam 220 at the valley portion 221 is a smooth transition, and the other end is a radial vertical transition. In the radial vertical transition portion, it is difficult for the follower 211 to pass over, thereby blocking the cam 220 from rotating, limiting the position of the cam 220, and preventing the second pull rope 250 from being pulled, so that the cam 220 rotates beyond a predetermined angle or exceeds the valley portion 221 when the lock bolt 210 is reset, resulting in failure to reset.

[0061] In this embodiment, the unlocking device 200 further includes a torsion spring 280, one end of which is fixedly arranged, and the other end of which is fixedly connected to the cam 220 or the first gear 232. After unlocking, the lock bolt 210 is reset to achieve re-locking of the gear ring 120, and a mechanical reset can also be used. When unlocking, the cam 220 rotates to compress the torsion spring 280, and when resetting, the power of the first motor 231 is released, and the elastic force of the torsion spring 280 can drive the cam 220 to rotate in the opposite direction, thereby driving the lock bolt 210 to automatically reset.

[0062] In some embodiments, the electric suction actuator also includes an upper cover 170 and a base 180, which are connected up and down to form a cavity for accommodating the electric suction assembly 100 and the unlocking device 200. The planetary carrier 140, the ring gear 120, the sun gear 130 and the cam 220 are coaxially arranged, and the planetary carrier 140, the sun gear 130, the first gear 232, the cam 220 and the second gear 152 are rotatably connected to the column 190. The overall structure is compact, which facilitates the installation of various components.

[0063] In some embodiments, a limit switch 181 is provided on the base 180, and a first protrusion 122 is provided on the gear ring 120. When the first protrusion 122 contacts the limit switch 181, the lock bolt 210 is engaged with the slot 121. The first protrusion 122 is detected by the limit switch 181 to determine whether the lock bolt 210 is in a locked state or an unlocked state. A limit protrusion is also provided on the upper cover 170, and a second protrusion is provided on the planet carrier 140. The limit protrusion is used to prevent the planet carrier 140 and the second protrusion from rotating beyond a predetermined angle. When the planet carrier 140 rotates clockwise by a predetermined angle, the second protrusion hits the limit protrusion on the upper cover 170 and stops rotating.

[0064] An embodiment of the present invention further provides an electric suction door, comprising the above-mentioned electric suction actuator.

[0065] For the electric suction door of this embodiment, when the electric suction component 100 of the electric suction actuator fails and the electric suction door lock is locked and cannot be opened, the unlocking device 200 can be used to unlock the gear ring 120 of the electric suction component 100, and the electric suction pull rope 160 can be released, so that the electric suction door lock and the electric suction door can be opened. The unlocking device 200 can be unlocked electrically or manually, and has strong flexibility.

[0066] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. An electric suction actuator, characterized in that: It includes an electric suction component and an unlocking device, wherein the unlocking device includes Lock bolt; A cam, wherein the lock bolt is provided with a follower that contacts and cooperates with the cam, and the cam is used to drive the follower to move back and forth in a straight line so that the lock bolt locks or unlocks the locked object; A first driving mechanism, the first driving mechanism is used to drive the cam to rotate, and the first driving mechanism includes a first motor; a first pull rope, the cam is directly or indirectly connected to the first pull rope, and pulling the first pull rope can drive the cam to rotate forward; as well as A second pull rope, the cam is directly or indirectly connected to the second pull rope, and pulling the second pull rope can drive the cam to reverse; Wherein, the electric suction component comprises: Several planetary gears; A gear ring, each of the planetary gears meshes with the inner teeth of the gear ring, the gear ring is provided with a slot that can be engaged with the lock bolt of the unlocking device, the lock bolt has a first position and a second position under the drive of the cam, the lock bolt is engaged with the slot in the first position, and the lock bolt is disengaged from the slot in the second position to release the gear ring from the constraint of the lock bolt; A sun gear, each of the planetary gears is arranged around the sun gear, and each of the planetary gears is meshed with the sun gear; A second driving mechanism, the second driving mechanism is used to drive the sun gear to rotate, and the second driving mechanism includes a second motor; a planet carrier, each of the planetary gears being hinged to the planet carrier respectively; and An electric suction pull rope, the electric suction pull rope is connected to the planetary frame, and the rotation of the planetary frame can pull or release the electric suction pull rope; The second driving mechanism further includes a second gear and a second worm, the second worm is in transmission cooperation with the second gear, the second motor is used to drive the second worm, the unfolded helix angle of the second worm is smaller than the friction angle of the second worm in contact with the second gear, the second gear is fixedly connected to the sun gear, and the rotation of the second gear can drive the sun gear to rotate; The first driving mechanism also includes a first gear and a first worm, the first worm is in transmission cooperation with the first gear, the first motor is used to drive the first worm, the unfolded helix angle of the first worm is not less than the friction angle of the first worm in contact with the first gear, the first gear is fixedly connected to the cam, and the rotation of the first gear can drive the cam to rotate.

2. The electric suction actuator according to claim 1, characterized in that: The electric suction actuator also includes a limit switch. A first protrusion is provided on the gear ring. When the first protrusion contacts the limit switch, the locking bolt is engaged with the locking slot.

3. The electric suction actuator according to claim 1, characterized in that: The electric suction actuator further comprises a fixedly arranged limiting protrusion, and a second protrusion is arranged on the planet carrier, and the limiting protrusion is used to prevent the planet carrier and the second protrusion from rotating beyond a predetermined angle.

4. The electric suction actuator according to any one of claims 1 to 3, characterized in that: The electric suction actuator also includes an upper cover and a base, wherein the upper cover and the base are connected to form a cavity for accommodating the electric suction assembly and the unlocking device, and the planet carrier, the ring gear, the sun gear and the cam are coaxially arranged.

5. The electric suction actuator according to claim 1, characterized in that: The cam has a valley portion, the cam has a smooth transition at one end of the valley portion, and the cam has a radially vertical transition at the other end of the valley portion.

6. The electric suction actuator according to claim 1, characterized in that: The unlocking device further comprises a torsion spring, one end of which is fixedly arranged, and the other end of which is fixedly connected to the cam or the first gear.

7. An electric suction door, characterized in that: An electric suction actuator comprising any one of claims 1 to 6.

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