Improved electric starting assembly

Abstract

An improved electric starting assembly disclosed by the present invention comprises a starting shell and a starting mechanism arranged in the starting shell, a power device is arranged on the outer side end face of the starting shell, the power device is in transmission connection with the starting mechanism, a starting switch is arranged on the starting shell, a circuit board is arranged on the inner side wall of the starting shell, and the circuit board is in transmission connection with the starting mechanism. The starting switch is connected with the power device through the circuit board, the power device comprises a motor arranged on the starting shell, a speed reduction driver is arranged on an output shaft of the motor, a main gear is arranged on the speed reduction driver, a driven wheel is arranged on the starting mechanism in the starting shell, and the driven wheel is connected with the circuit board. The main gear and the driven wheel are in meshing transmission, and the circle center lines of the motor, the speed reduction transmission device and the main gear are located on the same axis. According to the invention, traditional hand-pulling starting is changed into electric starting, so that large-scale use by common users is more convenient, and the practicability is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of general-purpose power machinery, and particularly relates to an improved electric starting assembly. BACKGROUND

[0002] It is known that in small general-purpose engines (mainly covering small engines, generators, water pumps, agricultural machinery, etc.), there are two ways to start the engine, namely manual starting or electric starting. Due to the cost of electric starting and the instability and consumption of the battery, the engine is usually designed with a manual starting device, and the manual starting device is generally composed of a starting assembly. For example, a starting assembly disclosed in a Chinese patent (CN210152818U) can be seen. In actual use, some users (such as users with little strength, etc.) cannot directly start by manual means, which causes normal use and inconvenience to ordinary users. There is no general-purpose device that can change manual starting to electric starting on traditional small general-purpose engines. Therefore, improvement is urgently needed. SUMMARY

[0003] (I) Technical problems to be solved

[0004] In view of the deficiencies in the prior art, the present application provides an improved electric starting assembly, which changes the traditional hand-pulled starting to electric starting, is more convenient for large-scale use by ordinary users, has stronger practicality, and has a broader market prospect.

[0005] (II) Technical solutions to be taken

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0007] An improved electric starting assembly, comprising a starting shell and a starting mechanism arranged inside the starting shell for controlling a flywheel on an engine, and a power device arranged on the outer end face of the starting shell, the power device being in transmission connection with the starting mechanism, and the starting shell being provided with a starting switch for controlling the power device, the inner side wall of the starting shell being provided with a circuit board, the starting switch and the power device being connected through the circuit board, the power device comprising a motor arranged on the starting shell, a speed reducer being arranged on the output shaft of the motor, a main gear being arranged on the speed reducer, a driven wheel being arranged on the starting mechanism inside the starting shell, the main gear and the driven wheel being in meshing transmission therebetween, and the centers of the motor, the speed reducer and the main gear being on the same axis.

[0008] Preferably, the speed reducer comprises an intermediate gear arranged on the motor output shaft, an inner ring gear inside the starting shell, a rotating seat arranged inside the inner ring gear, a planetary gear arranged on one end face of the rotating seat, the intermediate gear and the inner ring gear being in meshing transmission through the planetary gear, a central gear arranged on the other end face of the rotating seat, a connecting piece connected with the central gear, the main gear being arranged on the connecting piece, and the motor and the starting switch being connected through the circuit board.

[0009] Preferably, the starting shell is internally provided with a fixing seat for covering the connecting piece.

[0010] Preferably, the connecting piece comprises a connecting seat and a connecting column arranged on the connecting seat, the connecting seat and the connecting column being integrally formed, and the main gear being arranged on the connecting column.

[0011] Preferably, one end of the connecting column is used for mounting the main gear, and the other end of the connecting column is clamped in the central gear.

[0012] Preferably, the planetary gear and the rotating seat are fixedly connected through a fixing shaft.

[0013] Preferably, the starting mechanism comprises a starting wheel arranged inside the starting shell, a driving wheel arranged between the starting wheel and the starting shell, a starting disc spring arranged on an end face of the driving wheel on one side of the starting wheel, the starting wheel and the driving wheel being connected through a connecting shaft, the driving wheel being sleeved with the driven wheel, a pull cord disc being arranged on the driving wheel, at least two limiting flaps being arranged on the pull cord disc on one side of the driving wheel, the at least two limiting flaps being arranged around the connecting shaft, the connecting shaft connecting the pull cord disc, the driving wheel and the starting wheel in series, a rope groove being arranged on the circumference of the pull cord disc, a pull cord being mounted in the rope groove and wound in the rope groove, a pulling handle being arranged on the starting shell and connected with the pull cord, a pair of starting flaps being arranged on the outer end face of the starting wheel, and a reset spring being arranged on the starting wheel and used for resetting the starting flaps.

[0014] Preferably, the pull cord disc is provided with a recess for mounting the limiting flaps, and the recess is provided with a positioning column for mounting the limiting flaps.

[0015] Preferably, the at least two limiting flaps are preferably two.

[0016] Preferably, the starting wheel can be replaced by a ratchet wheel, in particular, the ratchet wheel comprises a ratchet seat arranged on the starting wheel, the ratchet seat is arranged with ratchet blocks arranged in pairs, the center of the ratchet seat is arranged with a ratchet gear matched with the ratchet blocks, the ratchet blocks swing back and forth on the ratchet seat, and the ratchet seat is arranged with a cover for covering the ratchet blocks and the ratchet gear.

[0017] (Three) technical effects to be achieved

[0018] Compared with the prior art, the beneficial effects of the present application are:

[0019] Firstly, the power device comprises a motor arranged on a starting shell, a speed reducer arranged on the output shaft of the motor, a main gear arranged on the speed reducer, a driven wheel arranged on the starting mechanism inside the starting shell, the main gear and the driven wheel are in meshing transmission, and the center lines of the motor, the speed reducer and the main gear are on the same axis. This arrangement not only changes the traditional hand-pulling starting into electric starting, but also makes it more convenient for ordinary users to use on a large scale, has stronger practicality, wider market prospects, and is more optimized in structure, greatly reducing the difficulty of production and manufacturing, and facilitating batch production and manufacturing.

[0020] Secondly, the speed reducer comprises an intermediate gear arranged on the output shaft of the motor, an inner gear ring located inside the starting shell, a rotating seat arranged inside the inner gear ring, a planetary gear arranged on one end face of the rotating seat, the intermediate gear and the inner gear ring are in meshing transmission through the planetary gear, a center gear is arranged on the other end face of the rotating seat, the center gear is connected with a connecting piece, the connecting piece is arranged with a main gear, and the motor and the starting switch are connected through a circuit board. The speed reducer of this arrangement can not only achieve transmission, but also achieve the purpose of speed reduction, which is conducive to meeting the use demand of electric starting.

[0021] Thirdly, the starting mechanism comprises a starting wheel arranged inside the starting shell, a starting wheel arranged between the starting wheel and the starting shell, a starting disc spring arranged on the end face of the starting wheel on one side of the starting wheel, the starting wheel and the starting wheel are connected through a connecting shaft, a driven wheel is sleeved on the starting wheel, a pull line disc is arranged on the starting wheel, at least two limiting flaps are arranged on the pull line disc on one side of the starting wheel, the at least two limiting flaps are arranged around the connecting shaft, the connecting shaft connects the pull line disc, the starting wheel and the starting wheel in series, a rope groove is arranged on the circumference of the pull line disc, a pull rope is installed in the rope groove and wound in the rope groove, a pulling handle is arranged on the starting shell, and the pulling handle is connected with the pull rope. This not only can realize electric starting, but also can realize manual pulling starting, has various forms, can provide users with more selection, and can meet the use demand of users. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1This is a schematic diagram of the main view of the present invention.

[0023] Figure 2 for Figure 1 Diagram showing the right-center view.

[0024] Figure 3 for Figure 2 Sectional view along the AA direction.

[0025] Figure 4 This is an exploded view of the present invention.

[0026] Figure 5 This is a schematic diagram of the overall invention.

[0027] Figure 6 This is a three-dimensional schematic diagram of the present invention.

[0028] Figure 7 for Figure 1 A schematic diagram from a top-down view.

[0029] Figure 8 This is an exploded schematic diagram of the motor, speed reducer, and main gear of the present invention.

[0030] Figure 9 This is a schematic diagram of the assembly of the speed reducer and main gear of the present invention.

[0031] Figure 10 This is an exploded view of the starting wheel, the driving wheel, the cable reel, and the driven wheel of the present invention.

[0032] Figure 11 This is a schematic diagram of the assembly of the starter wheel, engine wheel, cable reel, driven wheel and pull handle of the present invention.

[0033] Figure 12 This is a schematic diagram of a driven wheel mounted on the engine wheel of the present invention.

[0034] Figure 13 This is a schematic diagram of the present invention with a ratchet component.

[0035] Figure 14 This is an exploded view of the ratchet component of the present invention.

[0036] In the diagram: 1. Starter housing; 2. Starter mechanism; 3. Power unit; 4. Starter switch; 5. Circuit board; 21. Starter wheel; 22. Engine wheel; 23. Starter disc spring; 24. Connecting shaft; 25. Cable pull plate; 26. Restriction lever; 27. Pull handle; 28. Ratchet assembly; 31. Motor; 32. Reducer; 33. Main gear; 34. Driven wheel; 281. Ratchet seat; 282. Ratchet block; 283. Ratchet tooth; 284. Cover; 321. Intermediate gear; 322. Internal gear ring; 323. Rotating seat; 324. Planetary gear; 325. Central gear; 326. Connector; 327. Fixed seat. Detailed Implementation

[0037] In the description of this invention, it should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to the other element.

[0038] In the description of this invention, it should be noted that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0039] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0041] Example 1: See Figures 1 to 10An improved electric starter assembly includes a starter housing 1 and a starter mechanism 2 disposed inside the starter housing 1 for controlling the flywheel of the engine. A power unit 3 is disposed on the outer end face of the starter housing 1, and the power unit 3 is drively connected to the starter mechanism 2. A starter switch 4 for controlling the power unit 3 is disposed on the starter housing 1. A circuit board 5 is disposed on the inner side wall of the starter housing 1, and the starter switch 4 is connected to the power unit 3 through the circuit board 5. When the starter switch 4 is activated, the starter switch 4 starts the power unit 3 through the circuit board 5, and then the power unit 3 starts the engine (general purpose engine) through the starter mechanism 2. 3 includes a motor 31 mounted on the starter housing 1, which provides the power for starting. A reduction gear 32 is mounted on the output shaft of the motor 31, and a main gear 33 is mounted on the reduction gear 32. A driven wheel 34 is mounted on the starting mechanism 2 inside the starter housing 1. The main gear 33 and the driven wheel 34 mesh and transmit power. The center lines of the motor 31, the reduction gear 32 and the main gear 33 are all on the same axis. This configuration not only changes the traditional manual starter to an electric starter, making it more convenient for ordinary users to use on a large scale, but also has stronger practicality and a broader market prospect. Moreover, the structure is more optimized, which greatly reduces the difficulty of manufacturing and facilitates mass production.

[0042] Example 2: This can be explained based on Example 1, such as... Figures 1 to 12 As shown, the speed reducer 32 includes an intermediate gear 321 mounted on the output shaft of the motor 31, an internal gear ring 322 located inside the starter housing 1, a rotating seat 323 inside the internal gear ring 322, a planetary gear 324 mounted on one end face of the rotating seat 323, and the intermediate gear 321 and the internal gear ring 322 are driven by meshing with the planetary gear 324. A central gear 325 is mounted on the other end face of the rotating seat 323, and a connecting member 326 is connected to the central gear 325. A main gear 33 is mounted on the connecting member 326. This arrangement facilitates the rotation of the main gear 33 driven by the motor 31. The motor 31 is connected to the start switch 4 through the circuit board 5, which facilitates control via the start switch 4. In this embodiment, the intermediate gear 321 uses a 0.6 module 17-tooth gear, the planetary gear 324 uses a 0.6 module 14-tooth gear, and the internal gear ring 322 uses a 0.6 module 46-tooth gear. This arrangement facilitates mutual meshing and transmission, ultimately enabling the main gear 33 to mesh and transmit power to the driven gear 34. Through two-stage reduction, a reduction ratio of 33:1 is achieved, increasing torque and reducing speed.

[0043] Among them, such as Figures 1 to 12As shown, the starter housing 1 has a fixing seat 327 inside to cover the connector 326, which helps to better protect the connector 326. Further, the connector 326 includes a connecting seat and a connecting post mounted on the connecting seat. The connecting seat and the connecting post are integrally formed, and a main gear 33 is mounted on the connecting post. Even further, one end of the connecting post is used to mount the main gear 33, and the other end of the connecting post is engaged in the central gear 325, which facilitates transmission.

[0044] Among them, such as Figures 1 to 12 As shown, the planetary gear 324 and the rotating seat 323 can be fixedly connected by a fixed shaft, which facilitates implementation.

[0045] Example 3: This can be described based on Example 1 or Example 2, such as... Figures 1 to 12 As shown, the starting mechanism 2 includes a starting wheel 21 disposed inside the starting housing 1, a starting wheel 22 disposed between the starting wheel 21 and the starting housing 1, a starting disc spring 23 disposed on the end face of the starting wheel 22 located on one side of the starting wheel 21, the starting wheel 21 and the starting wheel 22 being connected by a connecting shaft 24, a driven wheel 34 sleeved on the starting wheel 22, a cable reel 25 disposed on the starting wheel 22, at least two limiting paddles 26 disposed on the cable reel 25 located on one side of the starting wheel 22, the at least two limiting paddles 26 being arranged around the connecting shaft 24, the connecting shaft 24 connecting the cable reel 25, the starting wheel 22 and the starting wheel 21 together. The pull cable reel 25 has a rope groove on its circumference, and a pull rope (not shown in the figure) is installed in the rope groove and wound in the rope groove. The starter housing 1 is provided with a pull handle 27, which is connected to the pull rope. The outer end face of the starter wheel 21 is provided with a pair of starter paddles (not shown in the figure, but two in this embodiment, the starter paddles are on the end face of the starter wheel 21 away from the limiting paddle 26). The starter wheel 21 is provided with a return spring (not shown in the figure, preferably a torsion spring) for resetting the starter paddles. This configuration can not only realize normal electric start, but also manual pull start, with various forms and a wide range of choices. In this embodiment, the minimum number of limiting paddles 26 is preferably two. This configuration is reasonable, not only because the operation is more stable with two limiting paddles 26, but also because the structure is not complicated, which greatly reduces the difficulty of manufacturing. To further explain, the function of the starter wheel 21 is to connect the starter disc spring. The starter wheel 21 provides support for the starter paddle. When the engine is not being started, the starter paddle will not be locked onto the starter cup of the engine (general-purpose engine), and the starter cup is connected to the crankshaft, so the engine will not be started. When the starter paddle is extended, it will lock onto the starter cup of the engine (general-purpose engine). Since the starter cup is connected to the crankshaft, the engine can be started.

[0046] Among them, such as Figures 1 to 12As shown, the driven wheel 34 is fixedly connected to the driven wheel 34 by screws or bolts, which facilitates installation and implementation.

[0047] Among them, such as Figures 1 to 12 As shown, the pull plate 25 is provided with a groove for installing the limiting lever 26, and the groove is provided with a positioning post for installing the limiting lever 26. This arrangement is conducive to the limiting lever 26 rotating back and forth around the positioning post as the axis.

[0048] Among them, such as Figure 13 and Figure 14 As shown, the starter wheel 21 can be replaced with a ratchet assembly 28. This arrangement is more reliable during operation, produces less noise, and better meets usage requirements. Specifically, the ratchet assembly 28 includes a ratchet seat 281 mounted on the starter wheel 22. The ratchet seat 281 has paired ratchet blocks 282. A ratchet tooth 283 that engages with the ratchet blocks 282 is located at the center of the ratchet seat 281. The ratchet blocks 282 swing back and forth on the ratchet seat 281. The ratchet seat 281 has a cover 284 for covering the ratchet blocks 282 and the ratchet tooth 283. This arrangement is simple and easy to manufacture.

[0049] like Figures 1 to 12 As shown, when the start switch 4 is pressed, the start switch 4 starts the motor 31 in the power unit 3 through the circuit board 5. The motor 31 drives the planetary gear 324 through the intermediate gear 321. The planetary gear 324 drives the rotating seat 32 to rotate in the internal gear ring 322. The rotating seat 32 causes the central gear 325 to rotate. The central gear 325 drives the connecting piece 326 to rotate. The connecting piece 326 drives the main gear 33 to rotate. The main gear 33 meshes with the driven wheel 34. Since the driven wheel 34 is fixedly sleeved on the start wheel 22, the driven wheel 34 causes the start wheel 22 to rotate together. Since the start wheel 22 is provided with a starter disc spring 23 (starter disc spring 23) on its end face, the starter disc spring 23 is used to start the engine wheel 22. The starting disc spring 23 is a seven-turn coiled spring. The starting disc spring 23 on the driven wheel 34 is constantly coiled. After coiling for approximately 0.8 seconds (about one turn), when the engine (general purpose engine) reaches top dead center, the cylinder pressure suddenly drops. At this time, the rebound force of the starting disc spring 23 is much greater than the resistance, causing it to suddenly release and provide the starting speed. This causes the starting paddle on the starting wheel 21 to engage with the engine (general purpose engine) starting cup. Since the starting cup is connected to the crankshaft, this allows for starting. When the starter switch 4 is not activated, the starting paddle will not engage with the engine (general purpose engine) starting cup, thus preventing starting. In the case of electric start, the limiting paddle 26 can limit the rotation of the starter wheel 22 and the cable reel 25.

[0050] like Figures 1 to 12As shown, when the handle 27 is pulled, the handle 27 can rotate the cable reel 25 via the pull rope. The cable reel 25 rotates the starter wheel 22 via the limiting paddle 26. The starter wheel 22 drives the starter wheel 21 to rotate. A starter disc spring 23 (a seven-turn coiled disc spring) is provided on the end face of the starter wheel 22. The starter disc spring 23 on the driven wheel 34 is always coiled, about one turn. After the engine (general purpose engine) rises to top dead center, the cylinder pressure suddenly drops. At this time, the rebound force of the starter disc spring 23 is much greater than the resistance, and it is suddenly released to provide the starting speed. In this way, the starter paddle on the starter wheel 21 will be locked onto the starter cup of the engine (general purpose engine). Since the starter cup is connected to the crankshaft, the starting operation can be performed. When the handle 27 is not pulled to start, the starter paddle will not be locked onto the starter cup of the engine (general purpose engine).

[0051] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts and rivets that are mature in the existing technology. The circuit board, starter, and internal engine components all adopt conventional models in the existing technology, and their internal structure belongs to the existing technology structure. Workers can complete normal operation according to the existing technical manual. In addition, the circuit connection adopts conventional connection methods in the existing technology, and will not be described in detail here.

[0052] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this invention. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this invention, or equivalent structural or procedural transformations made using the description and drawings of this invention, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this invention.

Claims

1. An improved electric starter assembly, comprising a starter housing (1) and a starter mechanism (2) disposed inside the starter housing (1) for controlling the flywheel of an engine, wherein a power unit (3) is disposed on the outer end face of the starter housing (1), the power unit (3) is drively connected to the starter mechanism (2), and a starter switch (4) for controlling the power unit (3) is disposed on the starter housing (1), wherein a circuit board (5) is disposed on the inner side wall of the starter housing (1), and the starter switch (4) is connected to the power unit (3) through the circuit board (5), characterized in that: The power device (3) comprises a motor (31) arranged on the starting shell (1), a speed reducer (32) arranged on the output shaft of the motor (31), a main gear (33) arranged on the speed reducer (32), a driven wheel (34) arranged on the starting mechanism (2) inside the starting shell (1), and the main gear (33) and the driven wheel (34) are in mesh transmission, and the centers of the motor (31), the speed reducer (32) and the main gear (33) are on the same axis.

2. The improved electric actuation assembly of claim 1, wherein: The speed reducer (32) comprises an intermediate gear (321) arranged on the output shaft of the motor (31), an inner gear ring (322) arranged inside the starting shell (1), a rotating seat (323) arranged inside the inner gear ring (322), a planetary gear (324) arranged on one end surface of the rotating seat (323), the intermediate gear (321) and the inner gear ring (322) are in mesh transmission through the planetary gear (324), a center gear (325) is arranged on the other end surface of the rotating seat (323), the center gear (325) is connected with a connecting piece (326), the main gear (33) is arranged on the connecting piece (326), and the motor (31) and the starting switch (4) are connected through the circuit board (5).

3. The improved electric actuation assembly of claim 2, wherein: The starting shell (1) is internally provided with a fixing seat (327) for covering the connecting piece (326).

4. The improved electric actuation assembly of claim 2 or 3, wherein: The connecting piece (326) comprises a connecting seat and a connecting column arranged on the connecting seat, the connecting seat and the connecting column are integrally formed, and the main gear (33) is arranged on the connecting column.

5. The improved electric actuation assembly of claim 4, wherein: One end of the connecting column is used for mounting the main gear (33), and the other end of the connecting column is clamped in the center gear (325).

6. The improved electrically activated assembly of claim 2 or 3 or 5, wherein: The planetary gear (324) and the rotating seat (323) can be fixedly connected through a fixing shaft.

7. The improved electric actuation assembly as claimed in claim 1 or 2 or 3 or 5 wherein: The starting mechanism (2) comprises a starting wheel (21) arranged inside the starting shell (1), a driving wheel (22) arranged between the starting wheel (21) and the starting shell (1), a starting disc spring (23) arranged on the end face of the driving wheel (22) on one side of the starting wheel (21), a connecting shaft (24) connecting the starting wheel (21) and the driving wheel (22), the driving wheel (22) sleeving the driven wheel (34), a pull line disc (25) arranged on the driving wheel (22), at least two limiting tabs (26) arranged on the pull line disc (25) on one side of the driving wheel (22), the at least two limiting tabs (26) being arranged around the connecting shaft (24), the connecting shaft (24) connecting the pull line disc (25), the driving wheel (22) and the starting wheel (21) in series, a rope groove being arranged on the circumference of the pull line disc (25), a pull rope being installed in the rope groove, a pulling handle (27) being arranged on the starting shell (1), the pulling handle (27) being connected with the pull rope, a pair of starting tabs being arranged on the outer end face of the starting wheel (21), a reset spring being arranged on the starting wheel (21) for resetting the starting tabs.

8. The improved electric actuation assembly of claim 7, wherein: The at least two limiting tabs (26) are preferably two.

9. The improved electric actuation assembly of claim 7, wherein: The pull line disc (25) is provided with a groove for mounting the limiting tab (26), and the groove is provided with a positioning column for mounting the limiting tab (26).

10. The improved electric actuation assembly of claim 7, wherein: The starting wheel (21) can be replaced by a ratchet member (28), specifically, the ratchet member (28) comprises a ratchet seat (281) arranged on the driving wheel (22), the ratchet seat (281) is provided with a pair of ratchet blocks (282) arranged opposite to each other, the center of the ratchet seat (281) is provided with a ratchet tooth (283) matched with the ratchet blocks (282), the ratchet blocks (282) swing back and forth on the ratchet seat (281), and the ratchet seat (281) is provided with a cover (284) for covering the ratchet blocks (282) and the ratchet tooth (283). The at least two limiting tabs (26) are preferably two. The pull line disc (25) is provided with a groove for mounting the limiting tab (26), and the groove is provided with a positioning column for mounting the limiting tab (26). The starting wheel (21) can be replaced by a ratchet member (28), specifically, the ratchet member (28) comprises a ratchet seat (281) arranged on the driving wheel (22), the ratchet seat (281) is provided with a pair of ratchet blocks (282) arranged opposite to each other, the center of the ratchet seat (281) is provided with a ratchet tooth (283) matched with the ratchet blocks (282), the ratchet blocks (282) swing back and forth on the ratchet seat (281), and the ratchet seat (281) is provided with a cover (284) for covering the ratchet blocks (282) and the ratchet tooth (283).

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