CN213839790U

CN213839790U - Fuel tank cap actuator with double-insurance structure

Info

Publication number: CN213839790U
Application number: CN202022979548.9U
Authority: CN
Inventors: 李鹏超; 王宗佳; 徐翔
Original assignee: Jiangsu Tetra Smart Technology Co ltd
Current assignee: Jiangsu Tetra Smart Technology Co ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-07-30
Anticipated expiration: 2030-12-09

Abstract

The utility model relates to an oil tank cap executor with dual fail-safe structure, it relates to executor technical field, and it is including the installation shell, the installation shell includes casing and cap, the casing includes locking chamber and motor chamber, be equipped with mechanical locking subassembly in the locking chamber, be equipped with electronic locking subassembly, its characterized in that in the motor chamber: the mechanical locking assembly sequentially comprises a locking rod, a locking ring matched with the locking rod and an elastic piece from top to bottom, and an opening for the locking rod to move up and down is formed in the shell cover; the electric locking assembly comprises a telescopic piece capable of locking the lock rod. Mechanical auto-lock cooperatees with electronic locking, and this application has the effect of realizing dual fail-safe.

Description

Fuel tank cap actuator with double-insurance structure

Technical Field

The present application relates to the field of actuators, and more particularly, to a fuel tank cap actuator with a dual fail-safe structure.

Background

The actuator is one of the fastest valve varieties developed in recent ten years, is widely applied to production processes with higher safety requirements, such as power plants, chemical engineering, oil refining and the like, and is a locking mechanism of an oil tank and a driving device for controlling the opening and closing of the oil tank cover.

In the related art, in order to avoid the occurrence of misoperation, the opening and closing of the fuel tank cap are performed in a mode of combining a mechanical locking structure with a mechanical structure and an electric structure. Generally, the locking effect is realized through the stroke controlled by a mechanical structure and the locking block controlled by a motor structure, or the locking is realized through machinery, the release is realized through an electric structure, and the whole opening and closing process of the oil tank cover is completed through the combination of the stroke controlled by the mechanical structure and the locking block controlled by the motor structure.

In view of the above related technologies, the inventor believes that a combination of a mechanical structure and an electric structure effectively reduces the risk of false start, but has a single safety performance, and as long as any one of the mechanical structure and the electric structure is damaged, the locking structure cannot realize the locking function.

SUMMERY OF THE UTILITY MODEL

In order to lock the structure and only form the locking effect through mechanical structure and electronic structure cooperation, the application provides an oil tank cap executor of dual fail-safe structure.

The application provides a fuel tank cap executor of dual fail-safe structure adopts following technical scheme:

the fuel tank cap actuator with the double-safety structure comprises an installation shell, wherein the installation shell comprises a shell body and a shell cover, the shell body comprises a locking cavity and a motor cavity, a mechanical locking assembly is arranged in the locking cavity, and an electric locking assembly is arranged in the motor cavity;

the mechanical locking assembly sequentially comprises a locking rod, a locking ring matched with the locking rod and an elastic piece from top to bottom, and an opening for the locking rod to move up and down is formed in the shell cover; the electric locking assembly comprises a telescopic piece capable of locking the lock rod.

Through adopting above-mentioned technical scheme, through locking lever, catch and elastic component, realize the effect of mechanical locking subassembly auto-lock, through the extensible member locking lever of electronic locking subassembly, realize the effect of electronic locking subassembly locking, mechanical auto-lock cooperatees with electronic locking, realizes dual fail-safe's effect.

Optionally, the lock rod is provided with at least two lugs, each lug forms a locking guide rail with the lug adjacent to one side of the lug, the lug forms a releasing guide rail with the lug adjacent to the other side of the lug, the lug is provided with a locking groove, and the locking groove is located between the locking guide rail and the releasing guide rail; the locking ring is fixed between the shell and the shell cover, locking guide blocks are arranged on the locking ring, and the number of the locking guide blocks is the same as that of the convex blocks.

By adopting the technical scheme, the locking guide rail and the release guide rail which are used for moving the locking guide block are formed by matching the convex block on the locking rod with the convex block, the locking ring is relatively fixed with the shell, and when the locking rod moves downwards, the locking guide block on the locking ring moves into the locking groove, and the locking rod is locked.

Optionally, the central axis of the locking ring is collinear with the central axis of the opening, and the locking guide is located on the inner ring of the locking ring.

Through adopting above-mentioned technical scheme, catch center pin and open-ended center pin collineation, the locking lever reciprocates the in-process and reciprocates at the catch and reciprocates in the catch, is convenient for set up a plurality of locking guide blocks on the catch for mechanical locking function has the multilayer guarantee.

Optionally, a lock head connected with the oil tank cover is arranged at one end, away from the lock ring, of the lock rod, the locking guide rail comprises a first guide slope and a second guide slope, the first guide slope and the second guide slope are symmetrically arranged with a horizontal cross shaft of the protrusion as a symmetry axis, and the locking groove is located on the second guide slope.

Through adopting above-mentioned technical scheme, the locking lever needs through the rotation for the tapered end unblock, so that the tank cap is opened. The setting on first guide slope and second guide slope, when the locking guide block of being convenient for removed in the locking guide rail, can rotate simultaneously, and then make the purpose that the fuel tank cap realized opening.

Optionally, the locking rod is connected with a rubber head, the rubber head is connected with a limiting cap located in the casing, an upper limiting head is arranged in the limiting cap, a lower limiting head is arranged in the casing, one end of the elastic part is sleeved on the upper limiting head, and the other end of the elastic part is sleeved on the lower limiting head.

Through adopting above-mentioned technical scheme, the locking lever removes in the casing through the external force of pressing, and the rubber head provides the space of buffering for the preliminary atress of locking lever. The elastic component is installed between last spacing head and lower spacing head, and the flexible orbit of elastic component is restricted to the locking chamber, and the maximum stroke that resets of elastic component is restricted to the spacing cap.

Optionally, the locking rod is sleeved with a telescopic rubber sleeve, one end of the telescopic rubber sleeve is connected with the locking head in a sealing mode, and the other end of the telescopic rubber sleeve is connected with the shell cover.

Through adopting above-mentioned technical scheme, flexible rubber sleeve plays the effect of sealed locking guide rail and release guide rail, reduces the influence that external environment caused the locking guide block.

Optionally, the electric locking assembly further includes a driver, a driving gear and a driven gear, the driver is fixed at the bottom of the housing, the driving gear is coaxially and fixedly connected with an output shaft of the driver, the driven gear is engaged with the driving gear, and the driven gear is rotatably connected with the housing cover; a stroke guide rail is arranged on the end face of the driven gear, one end of the stroke guide rail is arranged close to the peripheral wall of the driven gear, and the other end of the stroke guide rail is arranged close to the circle center of the driven gear; the telescopic link one end is equipped with the sliding block, the sliding block is located in the stroke guide rail, and follow under driven gear's the effect the stroke guide rail removes, one of them seted up on the lug and supplied the guide slot that the telescopic link stretched into.

Through adopting above-mentioned technical scheme, the driving gear rotates the back under the driver effect, and drive driven gear rotates for the sliding block removes at the stroke guide rail, makes the telescopic link realize flexible function, and the telescopic link card after stretching out realizes electronic locking function in the guide slot.

Optionally, a limiting member is fixed in the housing, the limiting member is located at one end of the driven gear, which is far away from the sliding block, a first limiting head and a second limiting head are respectively arranged at two ends of the limiting member, and a limiting member matched with the limiting member is fixed on the driven gear; the sliding block of telescopic link is located during the one end of stroke guide rail, the stopper with first spacing first butt, the sliding block of telescopic link is located during the other end of stroke guide rail, the stopper with the spacing first butt of second.

Through adopting above-mentioned technical scheme, through the multiple cooperation of guide slot position, telescopic link length, stroke guide rail angle, stroke guide rail length and locating part, the position of calibration telescopic link and guide slot can realize the effect of electronic locking.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the arrangement of the lock rod, the lock ring and the elastic piece, the lock rod is provided with a locking guide rail, a releasing guide rail and a locking groove for the movement of the locking guide block, so that the self-locking effect of a mechanical structure can be achieved;

2. through the arrangement of the telescopic piece and the guide groove on the lock rod, the driver controls the telescopic rod to extend into the guide groove, so that the electric locking effect can be achieved;

3. through the setting of spacing cap, can play the effect of restriction elastic component stroke.

Drawings

Fig. 1 is an exploded view of the overall structure of a fuel tank cap actuator in the embodiment of the present application.

Fig. 2 is an enlarged schematic view of a portion a of fig. 1.

Fig. 3 is a cross-sectional view of the mechanical locking assembly of fig. 1 mounted in a mounting housing taken along line B-B of fig. 1.

Fig. 4 is an enlarged schematic view of the portion C in fig. 1.

Fig. 5 is an enlarged schematic view of a portion D in fig. 1.

Fig. 6 is an exploded view of the motor locking assembly of fig. 1.

Description of reference numerals: 1. a mechanical locking assembly; 11. a lock head; 12. a lock lever; 121. a bump; 122. locking the guide rail; 1221. a first guide slope; 1222. a second guide ramp; 1223. a locking groove; 123. releasing the guide rail; 13. a rubber head; 14. a limiting cap; 141. an upper limiting head; 142. a lower limiting head; 15. an elastic member; 16. a telescopic pipe; 17. a locking ring; 171. a locking guide block; 2. an electrically powered locking assembly; 21. a driver; 22. a driving gear; 23. a driven gear; 231. a limiting block; 24. a telescopic rod; 241. a slider; 25. a fixing member; 251. a support table; 252. a limiting plate; 26. a travel guide rail; 27. a limiting member; 271. a first stopper; 272. a second limiting head; 3. mounting a shell; 31. a housing; 311. a lock cavity; 312. a motor cavity; 32. a shell cover; 321. a locking cover; 322. a motor cover; 323. and (4) opening.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses fuel tank cap executor with dual fail-safe structure. Referring to fig. 1, a fuel tank cap actuator having a double safety structure includes an actuator installed at a position of a vehicle adjacent to a fuel tank opening 323 for controlling opening and closing of the fuel tank cap at the position of the fuel tank opening 323. The actuator comprises a mechanical locking assembly 1, an electric locking assembly 2 and a mounting shell 3, the mounting shell 3 comprises a shell 31 and a shell cover 32, the shell 31 comprises a locking cavity 311 for mounting the mechanical locking assembly 1 and a motor cavity 312 for mounting the electric locking assembly 2, and the shell cover 32 comprises a locking cover 321 sealed at the position of the locking cavity 311 and a motor cover 322 sealed at the position of the motor cavity 312. Mechanical locking subassembly 1 has mechanical locking function, and electronic locking subassembly 2 has electronic locking function with the cooperation of mechanical locking subassembly 1 for the executor has dual fail-safe's effect.

Referring to fig. 1, the mechanical locking assembly 1 includes, in order from top to bottom, a locking head 11, a locking rod 12, a rubber head 13, a limit cap 14, and an elastic member 15. The locking cover 321 is provided with an opening 323, the lock head 11 is always located outside the locking cavity 311, and an extension tube 16 for sealing the opening 323 is connected between the lock head 11 and the locking cover 321, in this embodiment, the extension tube 16 is made of rubber material. When the fuel tank cover is in an open state, the lock head 11 is separated from the fuel tank cover, and the lock rod 12 is located in the telescopic tube 16 outside the locking cavity 311.

Referring to fig. 2, the locking lever 12 is provided with at least two protrusions 121, wherein one protrusion 121 and the adjacent protrusion 121 on one side form a locking rail 122, and the protrusion 121 and the adjacent protrusion 121 on the other side form a release rail 123. The locking rail 122 includes a first guide slope 1221 and a second guide slope 1222, the first guide slope 1221 and the second guide slope 1222 are symmetrically disposed with a horizontal center axis of the protrusion 121 as a symmetry axis, the second guide slope 1222 is disposed away from the rubber head 13, one end of the second guide slope 1222 away from the first guide slope 1221 is provided with a locking groove 1223, and a notch of the locking groove 1223 is disposed toward the release rail 123.

Referring to fig. 1 and 3, when the fuel tank cap is in the open state, the rubber head 13 is located at the position of the opening 323 of the locking cap 321, the rubber head 13 moves into the locking cavity 311 by the external force applied by the locking rod 12, and the rubber head 13 can have a certain buffer space when the locking rod 12 is initially stressed. When the fuel cap is in the open state, the stopper cap 14 is located in the locking cavity 311 and near one end of the opening 323 of the locking cap 321. The diameter of the limiting cap 14 is larger than that of the opening 323, so that the limiting cap 14 is always positioned in the locking cavity 311, the limiting cap 14 is fixedly connected with the rubber head 13, and the limiting cap 14 moves in the locking cavity 311 under the external force applied by the rubber head 13. An upper limiting head 141 is arranged in the limiting cap 14, a lower limiting head 142 is arranged at the bottom of the shell 31, one end of the elastic element 15 is sleeved on the upper limiting head 141, the other end of the elastic element 15 is sleeved on the lower limiting head 142, and the limiting cap 14 limits the elastic element 15 to be always located in the locking cavity 311 to stretch. In this embodiment, the elastic member 15 is a spring.

Referring to fig. 3 and 4, the mechanical lock assembly 1 further includes a lock ring 17 located at a top end position of the lock cavity 311, a central axis of the lock ring 17 is collinear with a central axis of the opening 323, and an inner ring diameter of the lock ring 17 is equal to the opening 323 diameter, so that the lock ring 17 is fixed between the lock cover 321 and the housing 31 by the lock cover 321. The lock ring 17 has lock guides 171 fixed to an inner circumference thereof, and the number of the lock guides 171 is equal to the number of the protrusions 121.

Referring to fig. 3 and 4, when the fuel tank cap needs to be closed, the fuel tank cap is rotated and closed by pressing the fuel tank cap, the lock head 11 is touched in the rotation process of the fuel tank cap, the lock head 11 extends into the lock hole of the fuel tank cap, external force is continuously applied to the fuel tank cap, and the lock head 11 is stressed and acts on the lock rod 12. One end of the lock lever 12 near the opening 323 passes through the opening 323 and the lock ring 17, and the lock guide 171 on the lock ring 17 moves along the lock guide rail 122.

Referring to fig. 2 and 4, during the movement of the locking guide block 171 along the locking guide rail 122, due to the arrangement of the first guide slope 1221, the locking lever 12 is rotated under the action of the locking guide rail 122 and the locking guide block 171, so that the locking head 11 rotates in the locking hole of the fuel tank cap, and thus the locking head 11 and the fuel tank cap are fastened to each other.

Referring to fig. 2 and 4, the locking guide 171 continues to move along the locking rail 122 and moves to the position of the second guide slope 1222, so that the locking head 11 is turned. When the lock head 11 rotates to a position close to and parallel to the lock hole of the oil tank cap, the locking guide block 171 moves into the locking groove 1223, as long as the lock rod 12 loses external pressure, the lock rod 12 cannot reset under the action of the locking guide block 171, that is, the position of the lock rod 12 is locked by the locking guide block 171, so that the oil tank cap can be closed and locked all the time, and the effect of locking the oil tank cap through the mechanical locking assembly 1 can be achieved. The process of moving the locking guide 171 to the locking groove 1223 position is the locking process of the mechanical locking assembly 1.

Referring to fig. 2 and 4, when it is not necessary to fix the lock lever 12, the lock lever 12 is pressed again by an external force such that the lock lever 12 continues to move down, and the locking guide 171 moves up with respect to the lock lever 12 and moves out of the locking groove 1223.

Referring to fig. 1, at this time, the lock lever 12 is immediately released, external force is not applied to the lock lever 12, and the lock lever 12 is restored by the elastic member 15.

Referring to fig. 2 and 4, during the reset of the lock lever 12, the locking guide 171 moves downward along the release rail with respect to the lock lever 12. During the process that the locking guide 171 moves out of the locking groove 1223, the lock head 11 continues to rotate back to a position parallel to the locking hole of the fuel tank cap, the lock head 11 is separated from the fuel tank cap, and simultaneously, the fuel tank cap is ejected by the locking rod 12 during the resetting process of the locking rod 12.

Referring to fig. 1 and 5, the electric locking assembly 2 includes, from bottom to top, a driver 21, a driving gear 22, a driven gear 23, and a telescopic rod 24. In this embodiment, the driver 21 is a motor, the driver 21 is fixed in the motor cavity 312, the fixing member 25 for fixing the driver 21 is disposed in the motor cavity 312, and the driving gear 22 is coaxially and fixedly connected with the output shaft of the driver 21. The driven gear 23 is engaged with the driving gear 22, and the driven gear 23 is rotatably connected with the fixing member 25. The end face of the driven gear 23 far away from the fixed part 25 is provided with a stroke guide rail 26, one end of the telescopic rod 24 is provided with a sliding block 241, and the sliding block 241 is positioned in the stroke guide rail 26.

Referring to fig. 1 and 5, the stroke rail 26 has a curved shape, one end of the stroke rail 26 is disposed near the central axis of the driven gear 23, and the other end of the stroke rail 26 is disposed near the peripheral wall of the driven gear 23. When the fuel lid is in the open state, the slide block 241 is located at one end of the travel rail 26 near the center axis of the driven gear 23. In the process of closing the oil tank cap, when the oil tank cap touches the lock head 11, the driver 21 is started, and after the driver 21 drives the driving gear 22 to rotate, the driven gear 23 is driven to rotate, so that the sliding block 241 moves in the travel guide rail 26. During the process that the sliding block 241 moves to the other end of the travel guide rail 26, the telescopic rod 24 is forced to extend into the locking cavity 311.

Referring to fig. 2, one of the protrusions 121 of the locking lever 12 is provided with a guide groove.

Referring to fig. 1 and 5, during the locking process of the mechanical locking assembly 1, one end of the telescopic rod 24 away from the sliding block 241 extends into the locking cavity 311.

Referring to fig. 1 and 2, the guide channel is rotated to a position facing the telescoping rod 24.

Referring to fig. 2 and 5, the end of the telescopic rod 24 remote from the sliding block 241 extends into the guide groove, further locking the locking lever 12.

Referring to fig. 1 and 5, a support base 251 extends toward the housing cover 32 from the fixing member 25, and a limit plate 252 abutting against the housing cover 32 is provided on both sides of the support base 251. The telescopic rod 24 is located on the supporting table 251 and located between the two limiting plates 252.

Referring to fig. 2 and 5, in the telescopic process of the telescopic rod 24, the telescopic rod 24 is limited by the support table 251 and the limit plate 252, and can only move in the horizontal direction and cannot move up and down, so that when the electric locking assembly 2 is started, the telescopic rod 24 can be accurately positioned in the guide groove.

Referring to fig. 5 and 6, an arc-shaped limiting member 27 is fixed on the fixing member 25, one end of the limiting member 27 is provided with a first limiting head 271, the other end of the limiting member 27 is provided with a second limiting head 272, and the driven gear 23 is provided with a limiting block 231; when the slide block 241 is positioned at one end of the stroke guide 26 close to the center axis of the driven gear 23, the stopper 231 abuts against the first stopper 271, and the stopper 231 rotates to the position of the second stopper 272 along with the driven gear 23 while the slide block 241 moves along the stroke guide 26. The first limiting head 271 and the second limiting head 272 are matched with the limiting block 231 to limit the rotation angle of the driven gear 23, and the maximum angle of the positive and negative rotation of the driven gear 23 is the radian of the limiting part 27.

Referring to fig. 5 and 6, the number of forward and reverse rotations of the actuator 21, the arc profile of the travel track, the length of the travel track, and the arc of the limit piece 27 are multiply matched to further improve the accuracy of the locking of the telescopic rod 24.

The implementation principle of the fuel tank cap actuator with the double-insurance structure in the embodiment of the application is as follows: when the fuel tank cap is opened, the fuel tank cap is pressed, and the lock head 11 and the lock rod 12 are forced to move towards the shell 31. When the locking guide 171 located in the locking groove 1223 is escaped from the locking groove 1223, the locking guide 171 moves to the position of the release rail 123, and the locking guide 171 moves from the locking groove 1223 to the position of the release rail 123, the lock lever 12 is forced to rotate, and the lock head 11 rotates to a position parallel to the locking hole of the tank cap. The locking rod 12 is reset by the elastic member 15, so that the locking guide 171 moves along the releasing guide 123, the locking rod 12 pushes against the fuel tank cap in the resetting process, the locking head 11 moves out of the locking hole of the fuel tank cap, and the fuel tank cap is opened by force.

When the fuel tank cover is pressed and touches the lock head 11, the driver 21 is started, and the driving gear 22 drives the driven gear 23 to rotate under the action of the driver 21. During the rotation of the driven gear 23, the limiting block 231 moves from the position of the second limiting head 272 to the position of the first limiting head 271, the sliding block 241 moves in the travel guide rail 26, the sliding block 241 moves from one end close to the peripheral wall of the driven gear 23 to one end close to the central shaft of the driven gear 23, and one end of the telescopic rod 24 away from the sliding block 241 retracts from the guide groove position into the motor cavity 312. The locking guide block 171 jumps out of the locking groove 1223 and the end of the telescopic rod 24 remote from the sliding block 241 moves out of the guide groove position, both of which are performed simultaneously, so that the locking lever 12 can be quickly reset and the fuel tank cap is opened.

When the fuel tank cap is closed, the locking guide block 171 moves into the locking groove 1223 along the first guide slope 1222, one end of the telescopic rod 24, which is far away from the sliding block 241, moves into the guide groove from the motor cavity 312, the locking head 11 moves into the locking hole of the fuel tank cap through the matching of the first guide slope and the second guide slope, the locking head 11 is intersected with the locking hole of the fuel tank cap, the locking rod 12 cannot be reset, and the fuel tank cap is locked.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A fuel tank cap actuator with a double safety feature, comprising a mounting housing (3), the mounting housing (3) comprising a housing body (31) and a housing cover (32), the housing body (31) comprising a locking chamber (311) and a motor chamber (312), characterized in that: a mechanical locking assembly (1) is arranged in the locking cavity (311), and an electric locking assembly (2) is arranged in the motor cavity (312);

the mechanical locking assembly (1) sequentially comprises a lock rod (12), a lock ring (17) matched with the lock rod (12) and an elastic piece (15) from top to bottom, and an opening (323) for the lock rod (12) to move up and down is formed in the shell cover (32); the electric locking assembly (2) comprises a telescopic piece capable of locking the lock rod (12).

2. The fuel tank cap actuator according to claim 1, wherein: the locking rod (12) is provided with at least two convex blocks (121), each convex block (121) and the adjacent convex block (121) on one side form a locking guide rail (122), the convex block (121) and the adjacent convex block (121) on the other side form a releasing guide rail (123), the convex block (121) is provided with a locking groove (1223), and the locking groove (1223) is positioned between the locking guide rail (122) and the releasing guide rail (123); the locking ring (17) is fixed between the shell (31) and the shell cover (32), locking guide blocks (171) are arranged on the locking ring (17), and the number of the locking guide blocks (171) is the same as that of the convex blocks (121).

3. The fuel tank cap actuator having a double safety feature of claim 2, wherein: the central axis of the lock ring (17) is collinear with the central axis of the opening (323), and the lock guide (171) is located on the inner ring of the lock ring (17).

4. The fuel tank cap actuator having a double safety feature of claim 2, wherein: one end, far away from the locking ring (17), of the locking rod (12) is provided with a locking head (11) connected with the oil tank cover, the locking guide rail (122) comprises a first guide slope (1221) and a second guide slope (1222), the first guide slope (1221) and the second guide slope (1222) are symmetrically arranged by taking a horizontal transverse shaft of the projection (121) as a symmetry axis, and the locking groove (1223) is positioned on the second guide slope (1222).

5. The fuel tank cap actuator according to claim 4, wherein: locking lever (12) are connected with rubber head (13), rubber head (13) are connected with and are located spacing cap (14) in casing (31), be equipped with spacing head (141) on spacing cap (14), be equipped with spacing head (142) down in casing (31), a pot head of elastic component (15) is established go up spacing head (141) on, the other pot head of elastic component (15) is established on spacing head (142) down.

6. The fuel tank cap actuator according to claim 4, wherein: the lock rod (12) is sleeved with a telescopic rubber sleeve, one end of the telescopic rubber sleeve is connected with the lock head (11) in a sealing mode, and the other end of the telescopic rubber sleeve is connected with the shell cover (32).

7. The fuel tank cap actuator according to claim 6, wherein: the electric locking assembly (2) further comprises a driver (21), a driving gear (22) and a driven gear (23), the driver (21) is fixed at the bottom of the shell (31), the driving gear (22) is coaxially and fixedly connected with an output shaft of the driver (21), the driven gear (23) is meshed with the driving gear (22), and the driven gear (23) is rotatably connected with the shell cover (32); a stroke guide rail (26) is arranged on the end face of the driven gear (23), one end of the stroke guide rail (26) is arranged close to the peripheral wall of the driven gear (23), and the other end of the stroke guide rail (26) is arranged close to the circle center of the driven gear (23); one end of the telescopic rod (24) is provided with a sliding block (241), the sliding block (241) is located in the travel guide rail (26) and moves along the travel guide rail (26) under the action of the driven gear (23), and one of the convex blocks (121) is provided with a guide groove for the telescopic rod (24) to extend into.

8. The fuel tank cap actuator according to claim 7, wherein: a limiting piece (27) is fixed in the shell (31), the limiting piece (27) is located at one end, away from the sliding block (241), of the driven gear (23), a first limiting head (271) and a second limiting head (272) are respectively arranged at two ends of the limiting piece (27), and a limiting piece (231) matched with the limiting piece (27) is fixed on the driven gear (23); when the sliding block (241) of the telescopic rod (24) is located at one end of the travel guide rail (26), the limiting block (231) is abutted to the first limiting head (271), and when the sliding block (241) of the telescopic rod (24) is located at the other end of the travel guide rail (26), the limiting block (231) is abutted to the second limiting head (272).