Electric self-suction lock actuator

Abstract

The invention relates to the technical field of vehicle accessories, in particular to an electric self-suction lock actuator which comprises a shell, an actuating wheel, a first inhaul cable and a second inhaul cable, the actuating wheel capable of rotating after being driven is arranged in the shell, and the two faces of the actuating wheel form a first actuating face and a second actuating face. An arc-shaped shifting groove is formed in the first execution face in the rotating direction, a coiling groove is formed between the driving disc and the second execution face, an arc-shaped driving groove communicated with the coiling groove is formed in the driving disc, a driving face is formed on the end face of one end of the driving groove, and the first inhaul cable is driven by the first execution face. A driving lever which rotates coaxially is arranged on the first execution surface, the rotating end of the driving lever is rotatably matched in the shell, the driving end of the driving lever is movably connected with the stress end of the first inhaul cable to drive the first inhaul cable, and the second inhaul cable is driven by the second execution surface. The technical problems that in the prior art, one actuator can only drive one inhaul cable, so that cost is high, and occupied space is large are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle accessories, in particular to an electric self-priming lock actuator. Background Art

[0002] The actuator of the car's hood lock is equipped with a cable, which is used to pull the hood lock's actuators, such as the lock hook and push rod, to switch the hood lock between fully locked, half-locked, and fully open states. The existing actuator's motor can only drive one cable, while the car's hood lock requires at least two cables. In other words, one car's hood lock requires two actuators, which is costly and takes up a lot of space in front of the car. Summary of the Invention

[0003] In order to solve the technical problem in the prior art that one actuator can only drive one cable, resulting in high cost and large space occupation, the present application proposes an electric self-priming lock actuator to solve the above technical problem.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] The present invention provides an electric self-priming lock actuator, comprising: a shell, wherein an actuator wheel that can rotate after being driven is arranged in the shell; an actuator wheel, wherein two surfaces of the actuator wheel are formed into a first actuator surface and a second actuator surface, an arc-shaped toggle groove is formed on the first actuator surface along the rotation direction, one end surface of the toggle groove is formed into a toggle surface, a driving disc is arranged on the second actuator surface, a winding groove is formed between the driving disc and the second actuator surface, a driving groove that is connected to the winding groove and is arc-shaped is formed on the driving disc, the extension direction of the driving groove is the same as the rotation direction of the actuator wheel, and one end surface of the driving groove is formed into a driving surface; a first cable, the first cable, the second ... A cable is driven by the first execution surface, and a coaxially rotating shift lever is arranged on the first execution surface. The rotating end of the shift lever can be rotatably engaged in the shell, and the driving end of the shift lever is movably connected with the force-bearing end of the first cable to drive the first cable. At the same time, a shift pin with a limited position and movement in the shift groove is formed on the shift lever. After the shift pin is pushed by the shift surface, it drives the first cable to realize a pulling action; a second cable, the second cable is driven by the second execution surface, and the force-bearing end of the second cable is limited to move in the driving groove. After the force-bearing end of the second cable is pushed by the driving surface, it drives the second cable to realize a pulling action.

[0006] Furthermore, the shell includes a first half shell and a second half shell that are assembled with each other, a receiving space is formed in the first half shell, the execution wheel and the shift lever are received in the receiving space, a rotating shaft is formed on the first half shell, and the execution wheel and the shift lever are rotatably assembled on the rotating shaft.

[0007] Furthermore, the joint between the first half shell and the second half shell is provided with a flange and an edge groove cooperating with the flange, the flange is formed on the first half shell, the edge groove is formed on the second half shell, and the flange is embedded in the edge groove and then laser welded to fuse the first half shell and the second half shell.

[0008] Furthermore, a torsion spring is arranged on the rotating end of the shift lever, and the rotating shaft includes a thick section mounted on the actuator wheel and a thin section mounted on the shift lever, and the outer periphery of the thick section close to one end of the thin section extends axially toward the thin section to form a mounting groove for mounting the ring body of the torsion spring, and an avoidance groove opened along the axial direction is formed on the thin section, and the avoidance groove is used to accommodate a force arm of the torsion spring; at the same time, a receiving groove for mounting the ring body of the torsion spring and an avoidance portion for accommodating another force arm of the torsion spring are formed on the surface of the shift lever facing the avoidance groove, and the avoidance portion is connected to the receiving groove.

[0009] Furthermore, the first and second cables both include a pull rod and a rope extending from one end of the pull rod, and an end of the rope away from the pull rod is connected to a force-bearing body driven by the execution wheel.

[0010] Furthermore, the pull rod is plugged into the shell through a quick connector, and the quick connector is sleeved on one end of the pull rod close to the shell and passed through by the rope. The quick connector includes a straight tube section on which the pull rod is sleeved and a plug-in section for plugging in. The body of the plug-in section gradually narrows toward the inside of the shell, and the narrowed part of the plug-in section includes a plurality of spaced-apart sheets to enable the plug-in section to deform and shrink when inserted. A circumferentially recessed tightening ring is formed at the transition between the straight tube section and the plug-in connector. Accordingly, a socket for inserting the quick connector is formed on the shell, and the inner diameter of the socket is adapted to the outer diameter of the tightening ring. A guide cylinder extends outward from the shell at the socket, and the inner diameter of the guide cylinder is adapted to the outer diameter of the straight tube section. A sealing ring is provided on the guide cylinder.

[0011] Furthermore, a movable groove is formed on the shift rod, and the force-bearing body of the first cable is restricted to move in the movable groove. One end of the movable groove is open, and a rope channel with an inner diameter smaller than the inner diameter of the movable groove is formed on the other end. The rope of the first cable enters the movable groove through the rope channel.

[0012] Furthermore, two limit baffles are formed on the housing, and the two baffles are respectively arranged at two limit positions of the shift lever stroke.

[0013] Furthermore, the force-bearing body of the second cable is limited to move in the driving groove, the rope of the second cable rests on the groove surface of the winding groove, and the rope enters the driving groove through the gap at the connection between the winding groove and the driving groove.

[0014] Furthermore, it also includes an electronic control device, which includes a driving motor arranged in the housing, a worm gear is connected to the driving shaft of the driving motor, and the worm gear drives the executive wheel through an intermediate wheel group, and the intermediate wheel group includes an integrally formed and coaxially arranged turbine and driving wheel, the turbine cooperates with the worm gear, and the driving wheel cooperates with the executive wheel; the electronic control device also includes a micro switch for signal feedback, the micro switch is arranged in the housing, and the pressing part of the micro switch is triggered by the outer peripheral surface of the driving disk and the concave point formed on the outer peripheral surface of the driving disk.

[0015] Based on the above technical solution, the technical effects that can be achieved by the present invention are:

[0016] The electric self-priming lock actuator of the present invention is equipped with an actuator wheel that can rotate after being driven in the shell. The two surfaces of the actuator wheel form a first actuator surface and a second actuator surface. The first actuator surface drives the toggle lever through the toggle groove, and the toggle lever drives the first cable to realize the pulling action. The second actuator surface directly drives the second cable through the driving groove to realize the pulling action, thereby driving the entire cable through one actuator wheel, solving the technical problem in the prior art that one actuator can only drive one cable, resulting in high cost and large space occupation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of the overall structure of the invented electric self-priming lock actuator;

[0018] Figure 2 A schematic diagram of the invented electric self-priming lock actuator from another perspective;

[0019] Figure 3 A schematic diagram of the invented electric self-priming lock actuator with its housing hidden;

[0020] Figure 4 A schematic diagram of the lever of the invented electric self-priming lock actuator;

[0021] Figure 5 A schematic diagram of the lever slot of the invented electric self-priming lock actuator;

[0022] Figure 6 A partial cross-sectional view of the lever of the invented electric self-priming lock actuator;

[0023] Figure 7 A schematic diagram of a lever for the invented electric self-priming lock actuator;

[0024] Figure 8 A schematic diagram of the driving slot of the invented electric self-priming lock actuator;

[0025] Figure 9 A schematic diagram of the second half shell of the electric self-priming lock actuator of the invention;

[0026] Figure 10 A schematic diagram of the first half shell of the electric self-priming lock actuator of the invention;

[0027] Figure 11 This is a cross-sectional schematic diagram of the quick connector of the invented electric self-priming lock actuator.

[0028] Wherein: 1-shell, 11-first half shell, 111-rotating shaft, 1111-thick section, 1112-thin section, 1113-mounting groove, 1114-avoidance groove, 112-flange, 12-second half shell, 121-edge groove, 13-socket, 131-guide cylinder, 14-limiting block;

[0029] 2-actuator wheel, 21-dial slot, 211-dial surface, 22-coil slot, 23-drive slot, 231-drive surface, 232-notch, 24-drive disc, 241-concave point;

[0030] 3-first cable, 31-shift lever, 311-storage slot, 312-avoidance portion, 313-movable slot, 314-rope channel, 32-shift pin, 33-torsion spring;

[0031] 4- Second cable;

[0032] 5-pull rod, 51-rope, 52-quick connector, 521-straight section, 522-plug section, 523-tightening ring, 53-force-bearing body, 54-sealing ring;

[0033] 6-Electronic control device, 61-Drive motor, 62-Turbine rod, 63-Intermediate wheel set, 631-Turbine, 632-Drive wheel, 64-Micro switch. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] like Figure 1-11As shown, the present invention provides an electric self-priming lock actuator, including a shell 1, an execution wheel 2, a first cable 3 and a second cable 4. The shell 1 is provided with an execution wheel 2 that can rotate after being driven. The execution wheel 2 is preferably an execution wheel 2 with eccentric gravity. The two surfaces of the execution wheel 2 are formed as a first execution surface and a second execution surface. An arc-shaped toggle groove 21 is formed on the first execution surface along the rotation direction, and one end surface of the toggle groove 21 is formed as a toggle surface 211. A driving disk 24 is provided on the second execution surface, and a winding groove 22 is formed between the driving disk 24 and the second execution surface. A driving groove 23 that is connected to the winding groove 22 and is arc-shaped is formed on the driving disk 24, and the extending direction of the driving groove 23 is the same as the rotation direction of the execution wheel 2. One end surface of the drive groove 23 is formed as a driving surface 231. The first cable 3 is driven by the first actuating surface. A coaxially rotating lever 31 is disposed on the first actuating surface. The rotating end of the lever 31 is rotatably engaged within the housing 1. The driving end of the lever 31 is movably connected to the force-bearing end of the first cable 3 to drive the first cable 3. Simultaneously, a toggle pin 32 is formed on the toggle lever 31, which is limited in position and movable within the toggle groove 21. When pushed by the toggle surface 211, the toggle pin 32 drives the first cable 3 to perform a pulling action. The second cable 4 is driven by the second actuating surface. The force-bearing end of the second cable 4 is limited in position and movable within the drive groove 23. When pushed by the driving surface 231, the force-bearing end of the second cable 4 drives the second cable 4 to perform a pulling action. The positions of the toggle groove 21 and the driving groove 23 are sufficient to ensure that the cable travel is sufficient and that the respective actions do not interfere with each other.

[0036] In a specific embodiment of the present invention, the shell 1 includes a first half shell 11 and a second half shell 12 that are assembled with each other. A receiving space is formed in the first half shell 11, and the execution wheel 2 and the shift lever 31 are received in the receiving space. A rotating shaft 111 is formed on the first half shell 11, and the execution wheel 2 and the shift lever 31 are both rotatably assembled on the rotating shaft 111.

[0037] Furthermore, the joint between the first half shell 11 and the second half shell 12 is provided with a flange 112 and an edge groove 121 cooperating with the flange 112. The flange 112 is formed on the first half shell 11, and the edge groove 121 is formed on the second half shell 12. After the flange 112 is embedded in the edge groove 121, laser welding is performed to fuse the first half shell 11 and the second half shell 12.

[0038] In a specific embodiment of the present invention, a torsion spring 33 is arranged on the rotating end of the shift lever 31, and the rotating shaft 111 includes a thick section 1111 mounted on the executing wheel 2 and a thin section 1112 mounted on the shift lever 31. The outer periphery of the thick section 1111 at one end close to the thin section 1112 extends axially toward the thin section 1112 to form a mounting groove 1113 for mounting a ring body of the torsion spring 33, and an axially opened avoidance groove 1114 is formed on the thin section 1112, and the avoidance groove 1114 is used to accommodate a force arm of the torsion spring 33; at the same time, a receiving groove 311 for mounting a ring body of the torsion spring 33 and an avoidance portion 312 for accommodating another force arm of the torsion spring 33 are formed on the surface of the shift lever 31 facing the avoidance groove 1114, and the avoidance portion 312 is connected to the receiving groove 311. The function of the torsion spring 33 is to enhance the reset ability of the first cable 3. In the absence of the torsion spring 33, the reset of the first cable 3 and the second cable 4 is achieved as the actuator on the vehicle lock at the end of the actuator is reset. For example, the rotation points of the ratchet and pawl on the vehicle lock are both equipped with reset torsion springs. However, sometimes the reset force on the pawl is small, so a torsion spring 33 is arranged on the lever 31 to assist in resetting the first cable 3 connected to the pawl.

[0039] In a specific embodiment of the present invention, the first cable 3 and the second cable 4 both include a pull rod 5 and a rope 51 extending from one end of the pull rod 5, and the end of the rope 51 away from the pull rod 5 is connected to a force-bearing body 53 driven by the execution wheel 2, wherein the force-bearing body 53 of the first cable 3 is spherical, and the force-bearing body 53 of the second cable 4 is cylindrical.

[0040] In a preferred embodiment of the present invention, the pull rod 5 is connected to the shell 1 through a quick connector 52, specifically a first half shell 11 with a receiving space, the quick connector 52 is sleeved on one end of the pull rod 5 close to the shell 1, and is passed through by the rope 51, the quick connector 52 includes a straight section 521 sleeved on the pull rod 5 and a plug section 522 for plugging, the plug section 522 is gradually narrowed toward the inside of the shell 1, and the narrowing of the plug section 522 includes a plurality of spaced apart sheets to make the plug section 522 deform and shrink when inserted, and the straight section 521 and the plug connector are connected. A circumferentially recessed tightening ring 523 is formed at the transition point. Correspondingly, a socket 13 is formed on the shell 1 for inserting the quick connector 52. The inner diameter of the socket 13 is adapted to the outer diameter of the tightening ring 523. The shell 1 has a guide cylinder 131 extending outward from the socket 13. The inner diameter of the guide cylinder 131 is adapted to the outer diameter of the straight section 521, thereby ensuring that the quick connector 52 can be firmly connected to the first half shell 11 after being inserted into the first half shell 11 and will not fall off. A sealing ring 54 is provided on the guide cylinder 131 to ensure waterproof sealing.

[0041] In a preferred embodiment of the present invention, a movable groove 313 is formed on the shift rod 31, and the force-bearing body 53 of the first cable 3 is restricted to move in the movable groove 313. One end of the movable groove 313 is open, and a rope 51 channel 314 with an inner diameter smaller than the inner diameter of the movable groove 313 is formed on the other end. The rope 51 of the first cable 3 enters the movable groove 313 through the rope 51 channel 314.

[0042] In a preferred embodiment of the present invention, two limit baffles 14 are formed on the housing 1, and the two baffles are respectively arranged at the two extreme positions of the travel of the lever 31. The function of the baffles is to prevent the lever 31 from excessively twisting and to prevent it from touching the electronic control device 6, such as touching the intermediate wheel set 63 of the electronic control device 6.

[0043] In a preferred embodiment of the present invention, the force-bearing body 53 of the second cable 4 is limited to move within the driving groove 23, and the rope 51 of the second cable 4 is against the groove surface of the winding groove 22, and the rope 51 enters the driving groove 23 through the notch 232 at the connection between the winding groove 22 and the driving groove 23.

[0044] In a preferred embodiment of the present invention, it also includes an electronic control device 6, which includes a drive motor 61 configured in the housing 1, a worm gear 62 is connected to the drive shaft of the drive motor 61, and the worm gear 62 drives the executive wheel 2 through the intermediate wheel set 63, the intermediate wheel set 63 includes an integrally formed and coaxially arranged turbine 631 and a drive wheel 632, the turbine 631 cooperates with the worm gear 62, and the drive wheel 632 cooperates with the executive wheel 2; the electronic control device 6 also includes a micro switch 64 for signal feedback, the micro switch 64 is configured in the housing 1, and the pressing portion of the micro switch 64 is triggered by the outer peripheral surface of the drive disk 24 and the concave point 241 formed on the outer peripheral surface of the drive disk 24, wherein when the pressing portion of the micro switch 64 is at the concave point 241 on the outer peripheral surface of the drive disk 24, the vehicle lock of the matching vehicle hood is in a fully locked state.

[0045] The cooperation process between the electric self-priming lock actuator of the present invention and the vehicle lock is as follows:

[0046] During the unlocking process, when the vehicle lock is in the fully locked state, the executive wheel 2 rotates, the lever 31 on the first executive surface is actuated, the first cable 3 is pulled once, and the vehicle lock enters the semi-locked state from the fully locked state; the first cable 3 is reset, the executive wheel 2 rotates again, the first cable 3 is pulled a second time, and the vehicle lock enters the fully unlocked state from the semi-locked state;

[0047] During the locking process, when the vehicle lock is in a semi-locked state, the executive wheel 2 rotates, and the second cable 4 on the second executive surface performs a pulling action, and the vehicle lock enters a fully locked state from a semi-locked state.

[0048] Among them, Figure 3As shown, when the vehicle lock is in the full-lock initial position, the cylindrical force-bearing body 53 of the second cable 4 is in the dark blue position. As the executive wheel 2 rotates during the unlocking process, the force-bearing body 53 in the dark blue position is driven to the green position by the driving groove 23. During this process, the second cable 4 does not pull, and then the front cover is not completely closed by external force, and the vehicle lock enters a semi-locked state. The executive wheel 2 rotates, and the driving surface 231 pushes the force-bearing body 53 in the green position of the second cable 4. The force-bearing body 53 in the green position rotates to the orange position. At this time, the gravity-eccentric executive wheel 2 is reset due to gravity, or driven by the external force of the electronic control device 6, the rope 51 of the second cable 4 will be driven by the groove surface of the winding groove 22, and the force-bearing body 53 of the second cable 4 moves from the orange position to the dark blue initial position.

[0049] It should be understood that the specific embodiments described above are only used to explain the present invention and are not intended to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. An electric self-priming lock actuator, characterized in that: include: A housing (1), wherein an actuator wheel (2) is disposed in the housing (1) and is rotatable after being driven; An execution wheel (2), wherein two surfaces of the execution wheel (2) are formed into a first execution surface and a second execution surface, an arc-shaped toggle groove (21) is formed on the first execution surface along the rotation direction, one end surface of the toggle groove (21) is formed as a toggle surface (211), a driving disc (24) is arranged on the second execution surface, a winding groove (22) is formed between the driving disc (24) and the second execution surface, a driving groove (23) in an arc shape and connected to the winding groove (22) is formed on the driving disc (24), an extension direction of the driving groove (23) is the same as the rotation direction of the execution wheel (2), and one end surface of the driving groove (23) is formed as a driving surface (231); A first cable (3), the first cable (3) is driven by the first execution surface, a coaxially rotating lever (31) is arranged on the first execution surface, the rotating end of the lever (31) is rotatably engaged in the housing (1), the driving end of the lever (31) is movably connected with the force-bearing end of the first cable (3) to drive the first cable (3), and at the same time, a toggle pin (32) is formed on the lever (31) and is movable in the toggle groove (21) with a limited position, and the toggle pin (32) is pushed by the toggle surface (211) to drive the first cable (3) to achieve a pulling action; The second cable (4) is driven by the second execution surface, the force-bearing end of the second cable (4) is limited to move in the driving groove (23), and the force-bearing end of the second cable (4) is pushed by the driving surface (231) to drive the second cable (4) to achieve a pulling action.

2. The electric self-priming lock actuator according to claim 1, characterized in that: The housing (1) comprises a first half shell (11) and a second half shell (12) which are assembled with each other. A receiving space is formed in the first half shell (11), and the execution wheel (2) and the shifting rod (31) are received in the receiving space. A rotating shaft (111) is formed on the first half shell (11), and the execution wheel (2) and the shifting rod (31) are both rotatably mounted on the rotating shaft (111).

3. The electric self-priming lock actuator according to claim 2, characterized in that: The joint between the first half shell (11) and the second half shell (12) is provided with a flange (112) and an edge groove (121) matched with the flange (112); the flange (112) is formed on the first half shell (11), and the edge groove (121) is formed on the second half shell (12); the flange (112) is embedded in the edge groove (121) and then laser welding is performed to fuse the first half shell (11) and the second half shell (12).

4. The electric self-priming lock actuator according to claim 2, characterized in that: A torsion spring (33) is arranged on the rotating end of the shifting rod (31), and the rotating shaft (111) comprises a thick section (1111) sleeved by the execution wheel (2) and a thin section (1112) sleeved by the shifting rod (31). The outer periphery of one end of the thick section (1111) close to the thin section (1112) extends axially toward the thin section (1112) to form an installation groove (1113) for installing the ring body of the torsion spring (33). The thin section (1111) is provided with a plurality of springs. 12) is formed with an avoidance groove (1114) opened along the axial direction, and the avoidance groove (1114) is used to accommodate a force arm of the torsion spring (33); at the same time, a receiving groove (311) for installing the ring body of the torsion spring (33) and an avoidance portion (312) for accommodating the other force arm of the torsion spring (33) are formed on the surface of the shifting rod (31) facing the avoidance groove (1114), and the avoidance portion (312) is communicated with the receiving groove (311).

5. The electric self-priming lock actuator according to claim 1, characterized in that: The first cable (3) and the second cable (4) both include a pull rod (5) and a rope (51) extending from one end of the pull rod (5); the end of the rope (51) away from the pull rod (5) is connected to a force-bearing body (53) driven by the execution wheel (2).

6. The electric self-priming lock actuator according to claim 5, characterized in that: The pull rod (5) is connected to the housing (1) through a quick connector (52). The quick connector (52) is sleeved on one end of the pull rod (5) close to the housing (1) and is passed through by the rope (51). The quick connector (52) includes a straight section (521) sleeved on the pull rod (5) and a plug-in section (522) for plugging in. The body of the plug-in section (522) gradually narrows toward the inside of the housing (1). The narrowing part of the plug-in section (522) includes a plurality of spaced-apart sheets to enable the plug-in section (522) to deform and shrink when inserted. A circumferentially recessed tightening ring (523) is formed at the transition between the straight section (521) and the plug connector. Correspondingly, a socket (13) for inserting the quick connector (52) is formed on the housing (1). The inner diameter of the socket (13) is adapted to the outer diameter of the tightening ring (523). A guide cylinder (131) extends outward from the housing (1) at the socket (13). The inner diameter of the guide cylinder (131) is adapted to the outer diameter of the straight section (521). A sealing ring (54) is provided on the guide cylinder (131).

7. The electric self-priming lock actuator according to claim 5, characterized in that: A movable groove (313) is formed on the shifting rod (31), and the force-bearing body (53) of the first cable (3) is restricted to move in the movable groove (313). One end of the movable groove (313) is open, and the other end is formed with a rope (51) channel (314) whose inner diameter is smaller than the inner diameter of the movable groove (313). The rope (51) of the first cable (3) enters the movable groove (313) through the rope (51) channel (314).

8. The electric self-priming lock actuator according to claim 1, characterized in that: Two position-limiting baffles (14) are formed on the housing (1), and the two baffles are respectively arranged at two limit positions of the travel of the shifting rod (31).

9. The electric self-priming lock actuator according to claim 5, characterized in that: The force-bearing body (53) of the second cable (4) is limited to move in the driving groove (23), and the rope (51) of the second cable (4) is against the groove surface of the winding groove (22), and the rope (51) enters the driving groove (23) through the notch (232) at the connection point between the winding groove (22) and the driving groove (23).

10. The electric self-priming lock actuator according to claim 1, characterized in that: The invention also includes an electric control device (6), the electric control device (6) including a driving motor (61) arranged in the housing (1), a worm gear (62) connected to the driving shaft of the driving motor (61), the worm gear (62) driving the execution wheel (2) through an intermediate wheel set (63), the intermediate wheel set (63) including a turbine (631) and a driving wheel (632) formed in one piece and arranged coaxially, the turbine (631) cooperating with the worm gear (62), and the driving wheel (632) cooperating with the execution wheel (2); the electric control device (6) also includes a micro switch (64) for signal feedback, the micro switch (64) being arranged in the housing (1), the pressing portion of the micro switch (64) being triggered by the outer peripheral surface of the driving disk (24) and the concave point (241) formed on the outer peripheral surface of the driving disk (24).

Images