Electric cover turning device

Abstract

The utility model discloses an electric cover turning device, which comprises a shell, a cover plate and a cover plate, the driving motor is arranged in the shell; the speed reducing mechanism is arranged in the shell, and the input end of the speed reducing mechanism is connected with the output end of the driving motor; the output shaft is connected to the output end of the speed reducing mechanism, and part of the output shaft extends out of the shell; an angle limiting piece used for limiting the rotation angle of the output shaft is arranged between the output end of the speed reducing mechanism and the part, arranged in the shell, of the output shaft. And the output end of the driving motor, the input end of the speed reducing mechanism, the output end of the speed reducing mechanism and the rotating center of the angle limiting piece are coaxially arranged. The output end of the driving motor, the input end of the speed reducing mechanism, the output end of the speed reducing mechanism and the rotating center of the angle limiting piece are coaxially arranged, the coaxiality is high, the overall structure of the cover turning device is more compact, operation is stable, the size of the cover turning device is far smaller than that of an existing cover turning device, and installation is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of electric gear flip covers, in particular to an electric flip cover device. Background Art

[0002] With the progress of the times and the development of science and technology, the demand for quality of life in all aspects has increased. People also have higher requirements for the structure and functionality of toilets, such as heating function, cover lifting function, etc.

[0003] Most of the bases and covers of toilets are still passive structures on the market. In some special scenarios, the passive cover cannot meet modern needs, such as: after going to the toilet, the toilet cover is not closed manually. Since the toilet is connected to the sewer, the smell may enter the room and cause discomfort to the personnel, etc. At the same time, based on the technical conditions of the existing flip motor, the flip motor is too large and requires too much installation space. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The technical problem to be solved by the utility model is to provide an electric flip cover device, in which the output end of the driving motor, the input end of the reduction mechanism, the output end of the reduction mechanism, and the rotation center of the angle limiter are coaxially arranged. The coaxiality is high, so the overall structure of the flip cover device is more compact, the operation is stable, and the volume is much smaller than the existing flip cover device, which is convenient for installation.

[0006] (II) Technical solution

[0007] The utility model solves the above technical problems by adopting an electric flip cover device, comprising:

[0008] A shell body having a cavity disposed therein;

[0009] A driving motor, which is arranged in the housing;

[0010] A speed reduction mechanism is disposed in the housing, and an input end of the speed reduction mechanism is connected to an output end of the drive motor;

[0011] An output shaft connected to an output end of the speed reduction mechanism, and the output shaft partially extends out of the housing;

[0012] Among them, an angle limiter for limiting the rotation angle of the output shaft is arranged between the output end of the reduction mechanism and the part of the output shaft placed in the shell; and the output end of the drive motor, the input end of the reduction mechanism, the output end of the reduction mechanism, and the rotation center of the angle limiter are coaxially arranged.

[0013] By adopting the above scheme, the drive motor, the reduction mechanism, the angle limiter, and the output shaft are connected and arranged in sequence, and the output end of the drive motor, the input end of the reduction mechanism, the output end of the reduction mechanism, and the rotation center of the angle limiter are coaxially arranged with high coaxiality. Then, the overall structure of the flip cover device is more compact, the operation is stable, and the volume is much smaller than that of the existing flip cover device, which is convenient for installation.

[0014] In some embodiments, the reduction mechanism includes a first planetary gear set, a second planetary gear set, and a third planetary gear set arranged coaxially in sequence; wherein the first planetary gear set includes a first sun gear transmission connected to the output end of the drive motor, and three first planetary gears meshing around the first sun gear; the second planetary gear set includes a second sun gear transmission connected to the first planetary gear, and three second planetary gears meshing around the second sun gear; the third planetary gear set includes a third sun gear transmission connected to the second planetary gear, and four third planetary gears meshing around the third sun gear, and the output shaft is transmission connected to the third planetary gear; correspondingly, the inner wall of the housing is provided with a ring gear meshing with the first planetary gear, the second planetary gear, and the third planetary gear.

[0015] In some embodiments, the angle limiter is connected to the third planetary gear through a plurality of positioning columns to achieve a transmission connection between the third planetary gear and the angle limiter, thereby driving the rotation of the output shaft to enable the drive motor to drive the output shaft to rotate.

[0016] In some embodiments, the first sun gear and the first planetary gear are helical teeth, the second sun gear and the second planetary gear are helical teeth, and the third sun gear and the third planetary gear are spur teeth; then, the ring gear has a helical tooth structure that can cooperate with the helical teeth, and a spur tooth structure that can cooperate with the spur teeth. The helical teeth are engaged, the meshing degree is better, the stress is reduced, the transmission is more stable, and the structure is more compact; and the housing is provided with an annular raised partition portion between the helical tooth structure and the spur tooth structure, so that the transmission is smoother.

[0017] In some embodiments, at least one limiting portion for limiting the rotation angle of the angle limiting member is provided in the cavity on the rotation travel of the angle limiting member.

[0018] In some embodiments, two spaced-apart limiting portions may be provided in the cavity, and a limiting matching portion may be provided on the angle limiting member. The limiting matching portion rotates the two limiting portions respectively to limit the rotation angle of the angle limiting member.

[0019] In some embodiments, the inner wall of the shell protrudes inward to form the limiting portion; the two ends of the limiting portion are formed with a first limiting end face and a second limiting end face; correspondingly, the outer peripheral wall of the angle limiting member is formed with a first limiting matching portion that can cooperate with the first limiting end face for limiting, and a second limiting matching portion that can cooperate with the second limiting end face for limiting.

[0020] Specifically, the following directions are defined as facing the output shaft; the flap device can be configured as a left flap device adapted to the left side of the toilet through a structural arrangement, or can be configured as a right flap device adapted to the right side of the toilet;

[0021] For the left flip cover device, when the first limit fitting part and the first limit end face of the limit part, the output shaft is in the initial position, that is, the toilet cover is in a closed state; then the drive motor is controlled to drive the angle limit part to rotate clockwise until the second limit fitting part and the second limit end face of the limit part are against each other, then the output shaft is driven to rotate synchronously and drive the toilet cover to flip open.

[0022] For the right flip cover device, when the first limit fitting part abuts against the first limit end face of the limit part, the output shaft is in the initial position, that is, the toilet cover is in a closed state; then the drive motor is controlled to drive the angle limit part to rotate counterclockwise until the second limit fitting part abuts against the second limit end face of the limit part, then the output shaft is driven to rotate synchronously and drives the toilet cover to flip open.

[0023] In some embodiments, the first position-limiting fitting portion is disposed close to the first position-limiting end surface, and the second position-limiting fitting portion is disposed close to the second position-limiting end surface.

[0024] In some embodiments, the outer peripheral wall protrusion of the angle limit member forms the first limit fitting portion and the second limit fitting portion; and, a first fitting end surface is formed on the side of the first limit fitting portion close to the first limit end surface, and a second fitting end surface is formed on the side of the second limit fitting portion close to the second limit end surface.

[0025] In some embodiments, the rotation angle of the angle limiter is 120±5°.

[0026] By adopting the above solution, the setting of the rotation angle can be adapted to a variety of different toilets.

[0027] In some embodiments, the angle limiter is integrally formed on one side of the output shaft close to the output end of the reduction mechanism, and the synchronization rate is high.

[0028] In some embodiments, an angle controller is also disposed in the cavity.

[0029] In some embodiments, the angle limiter has a plurality of teeth on its outer peripheral wall, and the angle controller can determine the rotation angle of the angle limiter by the number of rotating teeth. Since the angle limiter and the output shaft move synchronously, feedback on the rotation angle of the output shaft itself can be achieved.

[0030] In some embodiments, the shell includes an outer shell that is arranged to penetrate from top to bottom, a bottom cover assembled at an opening at one end of the outer shell, and a top cover assembled at an opening at the other end of the outer shell; the output shaft can rotate relative to the top cover.

[0031] In some embodiments, the top cover includes an end cover capable of closing the opening of the outer shell, and a matching wall formed by inward extension of the end cover and capable of abutting against the inner wall of the outer shell; the inner wall of the matching wall is provided with the limiting portion.

[0032] In some embodiments, the inner wall portion of the matching wall is raised to form a protrusion, and correspondingly, the angular position controller is provided with a recessed portion that can be matched with the protrusion to achieve fixed installation of the angular position controller on the matching wall; the outer sleeve of the output shaft is provided with an output shaft sleeve, and the fixed connection between the two is achieved through flat fitting; the output shaft sleeve includes a shaft sleeve portion sleeved outside the output shaft, and an extension wall formed by the portion of the shaft sleeve portion located in the cavity extending in the radial direction, and the end cover is located at the periphery of the central through-hole thereof and extends downward to form an inner wall, and the inner The wall abuts against the extension wall, and the extension wall abuts against the angle limiter, then the extension wall can be fixed by the angle limiter and the inner wall, thereby realizing the fixed installation of the output shaft sleeve; at the same time, the angle controller is sleeved outside the inner wall; the output shaft sleeve and the inner wall are provided with sealing rings near their top end openings to enhance the sealing performance, thereby ensuring the safety of the flip cover device; an elastic retaining ring is sleeved on the part of the output shaft sleeve extending out of the end cover to limit the movement of the output shaft sleeve in the axial direction, thereby ensuring the stability of its rotational movement.

[0033] (III) Beneficial effects

[0034] Compared with the prior art, the utility model designs an electric flip cover device, in which the output end of the driving motor, the input end of the reduction mechanism, the output end of the reduction mechanism, and the rotation center of the angle limiter are coaxially arranged with high coaxiality. The overall structure of the flip cover device is more compact, the operation is stable, and the volume is much smaller than the existing flip cover device, which is convenient for installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 This is an exploded view of an electric flip cover device of the utility model (left flip cover device);

[0037] Figure 2 It is a cross-sectional view of an electric flip cover device of the utility model (left flip cover device);

[0038] Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle;

[0039] Figure 4 for Figure 2 The enlarged schematic diagram of point B in the middle;

[0040] Figure 5 This is a schematic diagram of the cooperation between the angle limiter and the limiter of the utility model (left flip cover device, the toilet cover is in the closed state);

[0041] Figure 6 for Figure 5 The enlarged schematic diagram at C in the middle;

[0042] Figure 7 This is a schematic diagram of the cooperation between the angle limiter and the limiter of the utility model (left flip cover device, the toilet cover is in the open state);

[0043] Figure 8 This is a schematic diagram of the cooperation between the angle limiter and the limiter of the utility model (right flip cover device, the toilet cover is in the closed state);

[0044] Fig. 9 This is a schematic diagram of the cooperation between the angle limiter and the limiter portion of the utility model (right flip cover device, the toilet cover is in the open state).

[0045] The names of the components corresponding to the various reference numerals in the figure are: 10, shell; 11, cavity; 12, limit portion; 121, first limit end face; 122, second limit end face; 13, outer shell; 14, bottom cover; 15, top cover; 151, end cover; 152, matching wall; 152a, raised portion; 153, inner wall; 16, ring gear; 17, partition; 20, drive motor; 30, speed reduction mechanism; 31, first planetary gear set; 311, first sun gear; 312, first planetary gear; 32, second planetary gear Gear set; 321, second sun gear; 322, second planetary gear; 33, third planetary gear set; 331, third sun gear; 332, third planetary gear; 40, output shaft; 41, output shaft sleeve; 411, shaft sleeve portion; 412, extension wall; 50, angle limiter; 51, first limit fitting portion; 511, first fitting end face; 52, second limit fitting portion; 521, second fitting end face; 53, tooth portion; 60, angular position controller; 61, recessed portion; 70, sealing ring; 80, elastic retaining ring. DETAILED DESCRIPTION

[0046] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0047] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0049] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0050] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0051] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0052] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0053] like Figure 1-Figure 7 As shown, the utility model discloses an electric flip cover device, including a shell 10, which is provided with a cavity 11 inside; a driving motor 20, which is arranged in the shell 10; a reduction mechanism 30, which is arranged in the shell 10, and the input end of the reduction mechanism 30 is connected to the output end of the driving motor 20; an output shaft 40, which is connected to the output end of the reduction mechanism 30, and the output shaft 40 partially extends out of the shell 10; wherein, an angle limiter 50 for limiting the rotation angle of the output shaft 40 is provided between the output end of the reduction mechanism 30 and the part of the output shaft 40 placed in the shell 10; and the output end of the driving motor 20, the input end of the reduction mechanism 30, the output end of the reduction mechanism 30, and the rotation center of the angle limiter 50 are coaxially arranged. By adopting the above scheme, the drive motor 20, the reduction mechanism 30, the angle limiter 50, and the output shaft 40 are sequentially connected and arranged, and the output end of the drive motor 20, the input end of the reduction mechanism 30, the output end of the reduction mechanism 30, and the rotation center of the angle limiter 50 are coaxially arranged with high coaxiality. Then, the overall structure of the flip cover device is more compact, the operation is stable, and the volume is much smaller than that of the existing flip cover device, which is convenient for installation.

[0054] In some embodiments, the reduction mechanism 30 includes a first planetary gear set 31, a second planetary gear set 32, and a third planetary gear set 33 which are coaxially arranged in sequence; wherein the first planetary gear set 31 includes a first sun gear 311 which is transmission-connected to the output end of the drive motor 20, and three first planetary gears 312 which are meshed around the first sun gear 311; the second planetary gear set 32 ​​includes a second sun gear 321 which is transmission-connected to the first planetary gear 312, and three second planetary gears 322 which are meshed around the second sun gear 321; the third planetary gear set 33 includes a third sun gear 331 which is transmission-connected to the second planetary gear 322, and four third planetary gears 332 which are meshed around the third sun gear 331, and the output shaft 40 is transmission-connected to the third planetary gear 332; correspondingly, the inner wall 153 of the housing 10 is provided with a ring gear 16 which is meshed with the first planetary gear 312, the second planetary gear 322, and the third planetary gear 332. In some embodiments, the angle limiter 50 is connected to the third planetary gear 332 through a plurality of positioning columns to realize the transmission connection between the third planetary gear 332 and the angle limiter 50, and then the output shaft 40 can be driven to rotate, so that the drive motor 20 drives the output shaft 40 to rotate. In some embodiments, the first sun gear 311 and the first planetary gear 312 are helical teeth, the second sun gear 321 and the second planetary gear 322 are helical teeth, and the third sun gear 331 and the third planetary gear 332 are spur teeth; then, the gear ring 16 has a helical tooth structure that can cooperate with the helical teeth, and a spur tooth structure that can cooperate with the spur teeth. The helical teeth are meshed, the meshing degree is better, the stress is reduced, the transmission is more stable, and the structure is more compact; and the housing 10 is provided with an annular raised partition 17 between the helical tooth structure and the spur tooth structure, so that the transmission is more stable.

[0055] In some embodiments, a limiting portion 12 for limiting the rotation angle of the angle limiting member 50 is provided in the cavity 11 on the rotation stroke of the angle limiting member 50. In some embodiments, the inner wall 153 of the housing 10 protrudes inward to form the limiting portion 12; the two ends of the limiting portion 12 are formed with a first limiting end face 121 and a second limiting end face 122; correspondingly, the outer peripheral wall of the angle limiting member 50 is formed with a first limiting matching portion 51 capable of cooperating with the first limiting end face 121 for limiting, and a second limiting matching portion 52 capable of cooperating with the second limiting end face 122 for limiting. In some embodiments, the first limiting matching portion 51 is arranged close to the first limiting end face 121, and the second limiting matching portion 52 is arranged close to the second limiting end face 122. In some embodiments, the outer peripheral wall of the angle limiter 50 is raised to form the first limiter fitting portion 51 and the second limiter fitting portion 52; and the first limiter fitting portion 51 is formed with a first fitting end surface 511 on one side close to the first limiter end surface 121, and the second limiter fitting portion 52 is formed with a second fitting end surface 521 on one side close to the second limiter end surface 122. In some embodiments, the rotation angle of the angle limiter 50 is 115°. With the above solution, the setting of the rotation angle can be adapted to a variety of different toilets.

[0056] In some embodiments, the angle limiter 50 is integrally formed on one side of the output shaft 40 close to the output end of the speed reduction mechanism 30, and the synchronization rate is high. In some embodiments, an angle controller 60 is also provided in the cavity 11. In some embodiments, the outer peripheral wall of the angle limiter 50 has a plurality of teeth 53, and the angle controller 60 can determine the rotation angle of the angle limiter 50 by the number of teeth 53 that rotate. Since the angle limiter 50 and the output shaft 40 move synchronously, feedback on the rotation angle of the output shaft 40 itself can be achieved.

[0057] In some embodiments, the housing 10 includes an outer shell 13 that is vertically through-set, a bottom cover 14 assembled at an opening at one end of the outer shell 13, and a top cover 15 assembled at an opening at the other end of the outer shell 13; the output shaft 40 can rotate relative to the top cover 15. In some embodiments, the top cover 15 includes an end cover 151 that can close the opening of the outer shell 13, and a matching wall 152 formed by the end cover 151 extending inwardly and being able to abut against an inner wall 153 of the outer shell 13; the inner wall 153 of the matching wall 152 is provided with the limiting portion 12. In some embodiments, the inner wall 153 of the matching wall 152 is partially raised to form a protrusion 152a, and correspondingly, the angular position controller 60 is provided with a recessed portion 61 that can be matched with the protrusion 152a to achieve the fixed installation of the angular position controller 60 on the matching wall 152; the output shaft 40 is sleeved with an output shaft sleeve 41 on the outside, and the fixed connection between the two is achieved by flat fitting; the output shaft sleeve 41 includes a shaft sleeve portion 411 sleeved outside the output shaft 40, and an extension wall 412 formed by the portion of the shaft sleeve portion 411 located in the cavity 11 extending in the radial direction; the end cover 151 is located at the periphery of the central through hole thereof and extends downward to form an inner wall 153, The inner wall 153 abuts against the extension wall 412, and the extension wall 412 abuts against the angle limiter 50, so that the extension wall 412 can be fixed by the angle limiter 50 and the inner wall 153, thereby realizing the fixed installation of the output sleeve 41; at the same time, the angle controller 60 is sleeved outside the inner wall 153; the output sleeve 41 and the inner wall 153 are provided with a sealing ring 70 near their top end openings to enhance the sealing performance, thereby ensuring the safety of the flip cover device; an elastic retaining ring 80 is sleeved on the portion of the output sleeve 41 extending out of the end cover 151 to limit the movement of the output sleeve 41 in the axial direction, thereby ensuring the stability of its rotational movement.

[0058] Specifically, the following directions are defined in terms of the direction facing the output shaft 40; the flap device is configured to be a left flap device adapted to the left side of the toilet through a structural arrangement. For the left flap device, when the first limiting fitting portion 51 is in contact with the first limiting end surface 121 of the limiting portion 12, the output shaft 40 is in the initial position, that is, the toilet lid is in a closed state; the drive motor 20 is controlled to drive the angle limiting member 50 to rotate clockwise until the second limiting fitting portion 52 is in contact with the second limiting end surface 122 of the limiting portion 12, and the output shaft 40 is driven to rotate synchronously, and the toilet lid is driven to flip open.

[0059] like Figure 8-Figure 9As shown, the utility model also discloses an electric flap device, which is configured as a right flap device adapted to the left side of the toilet through structural arrangement. The following direction is defined as facing the output shaft 40; when the first limiting fitting part 51 abuts against the first limiting end face 121 of the limiting part 12, the output shaft 40 is in the initial position, that is, the toilet cover is in a closed state; then the driving motor 20 is controlled to drive the angle limiting member 50 to rotate counterclockwise until the second limiting fitting part 52 abuts against the second limiting end face 122 of the limiting part 12, then the output shaft 40 is driven to rotate synchronously and drives the toilet cover to flip open.

[0060] The same and similar parts between the various embodiments in this specification can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0061] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An electric flip cover device, characterized in that: include A housing (10) having a cavity (11) disposed therein; A driving motor (20) disposed in the housing (10); A speed reduction mechanism (30) is disposed in the housing (10), and an input end of the speed reduction mechanism (30) is connected to an output end of the drive motor (20); an output shaft (40) connected to an output end of the speed reduction mechanism (30), and the output shaft (40) partially extends out of the housing (10); An angle limiter (50) for limiting the rotation angle of the output shaft (40) is provided between the output end of the reduction mechanism (30) and the portion of the output shaft (40) disposed in the housing (10); and the output end of the drive motor (20), the input end of the reduction mechanism (30), the output end of the reduction mechanism (30), and the rotation center of the angle limiter (50) are coaxially arranged.

2. The electric flip cover device according to claim 1, characterized in that: At least one limiting portion (12) for limiting the rotation angle of the angle limiting member (50) is provided in the cavity (11) on the rotation stroke of the angle limiting member (50).

3. The electric flip cover device according to claim 2, characterized in that: The inner wall (153) of the shell (10) protrudes inward to form the limiting portion (12); the two ends of the limiting portion (12) are formed with a first limiting end face (121) and a second limiting end face (122); correspondingly, the outer peripheral wall of the angle limiting member (50) is formed with a first limiting matching portion (51) capable of cooperating with the first limiting end face (121) for limiting, and a second limiting matching portion (52) capable of cooperating with the second limiting end face (122) for limiting.

4. The electric flip cover device according to claim 3, characterized in that: The first position-limiting matching portion (51) is arranged close to the first position-limiting end surface (121), and the second position-limiting matching portion (52) is arranged close to the second position-limiting end surface (122).

5. The electric flip cover device according to claim 3, characterized in that: The outer peripheral wall protrusion of the angle limiting member (50) forms the first limiting fitting portion (51) and the second limiting fitting portion (52); and, the first limiting fitting portion (51) has a first fitting end surface (511) formed on a side close to the first limiting end surface (121), and the second limiting fitting portion (52) has a second fitting end surface (521) formed on a side close to the second limiting end surface (122).

6. The electric flip cover device according to claim 2, characterized in that: The rotation angle of the angle limiting member (50) is 120±5°.

7. The electric flip cover device according to claim 1, characterized in that: The angle limiting component (50) is integrally formed on one side of the output shaft (40) close to the output end of the speed reduction mechanism (30).

8. The electric flip cover device according to claim 1, characterized in that: An angular position controller (60) is also arranged in the cavity (11).

9. The electric flip cover device according to claim 2, characterized in that: The housing (10) comprises an outer shell (13) which is arranged to penetrate from top to bottom, a bottom cover (14) assembled at an opening at one end of the outer shell (13), and a top cover (15) assembled at an opening at the other end of the outer shell (13); the output shaft (40) is rotatable relative to the top cover (15).

10. The electric flip cover device according to claim 9, characterized in that: The top cover (15) comprises an end cover (151) capable of closing an opening of the outer shell (13), and a matching wall (152) formed by inward extension of the end cover (151) and capable of abutting against an inner wall (153) of the outer shell (13); the inner wall (153) of the matching wall (152) is provided with the limiting portion (12).

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