Electric flip driver

Abstract

The utility model discloses an electric flip driver, which comprises a shell, a power device, a transmission device and an output shaft, the power device and the transmission device are arranged in the shell, the output shaft is connected with the transmission device, the shell comprises a middle shell, a front end cover and a rear end cover, and the front end cover and the rear end cover are arranged at two ends of the middle shell. A partition plate is arranged in the middle shell and divides the middle shell into two independent functional chambers, namely a power unit mounting chamber and a transmission device mounting chamber; a motor is installed in the power unit installation chamber, and the output end of the motor is connected with a reversing transmission pair capable of changing the power transmission direction of an output shaft of the motor. And the transmission device mounting chamber is used for mounting a transmission device for speed reduction and a power output shaft. In conclusion, by means of the compact structural design, the high-strength shell, the efficient transmission device, the overload protection mechanism and the accurate angle detection and feedback technology, the electric cover turning driver achieves the purpose that powerful torque is output in the small size, and the stability of the automatic cover turning function of the intelligent closestool is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of intelligent home drive flipping, in particular to an electric flip cover driver. Background Art

[0002] In today's society, the smart home sector is experiencing unprecedented rapid development. A wide variety of smart home appliances are popping up like mushrooms after rain, significantly enriching the market and improving consumers' quality of life. Among them, smart toilets, as a key component of smart home products, are experiencing particularly rapid growth and are highly sought after by consumers.

[0003] One of the core functions of a smart toilet is its automatic flap, a convenient feature that greatly enhances the user experience. Currently, smart toilets on the market generally utilize an electric flap actuator to achieve this function. However, due to internal space constraints within smart toilets, the flap actuator must be relatively compact, placing stringent requirements on the motor specifications, requiring a small motor to accommodate the installation space.

[0004] Although compact, small motors require specialized transmission and reduction gears to achieve powerful output torque within their limited dimensions, ensuring smooth and stable automatic flip operation. The design and optimization of these devices are key to improving the performance of electric flip drives.

[0005] Therefore, in response to the problems and challenges existing in the existing technology, the utility model aims to develop a new type of electric flip-up driver, which can achieve powerful output torque in a compact size, ensure that the automatic flip-up function of the smart toilet is more stable and reliable, and further enhance the user experience. Utility Model Content

[0006] In response to the problems existing in the prior art, the utility model provides an electric flip-up driver that can achieve powerful output torque in a compact size, ensuring that the automatic flip-up function of the smart toilet is more stable.

[0007] The utility model is implemented as follows: an electric flip cover drive includes a housing, a power device and a transmission device installed in the housing, and an output shaft connected to the transmission device, characterized in that: the housing includes an intermediate housing and a front cover and a rear cover installed at both ends of the intermediate housing; a partition is provided in the intermediate housing, and the partition divides the intermediate housing into two independent functional chambers, namely a power unit installation chamber and a transmission device installation chamber; a motor is installed in the power unit installation chamber, and the output end of the motor is connected to a reversing transmission pair that can change the power transmission direction of the motor output shaft; the transmission device installation chamber is used to install a transmission device for deceleration and a power output shaft.

[0008] Preferably, the reversing transmission pair is a single-stage reduction reversing gear pair, including a worm gear transmission pair consisting of a worm wheel and a worm, a bevel gear pair consisting of two bevel gears, or an end gear transmission pair consisting of an end gear and a cylindrical gear.

[0009] Preferably, the transmission device is a reduction gear pair, including a secondary reduction input pinion coaxially mounted on the primary transmission shaft with the worm gear or driven bevel gear or cylindrical gear, the secondary reduction input pinion meshing with the secondary output gearwheel, the secondary output gearwheel being mounted between the partition and the front end cover through the secondary transmission shaft; the secondary output gearwheel is connected to the final input pinion through an overload protection mechanism, the final input pinion meshing with the final output gearwheel, the final output gearwheel being mounted on the power output shaft, the power output shaft being mounted on the partition and the front end cover, and the power output shaft extending out of the front end cover.

[0010] Preferably, the overload protection mechanism includes an elastic deformation part connected to the final input pinion, the elastic deformation part includes a rotating sleeve, and the outer circumference of the rotating sleeve is provided with at least two fan-shaped deformation bodies, and there is a gap between adjacent fan-shaped deformation bodies; the outer surface of the fan-shaped deformation body is provided with a tooth connection part, and the tooth connection part is engaged with the inner gear ring of the secondary output large gear.

[0011] Preferably, the overload protection mechanism includes an overload protection disk connected to the final input pinion, the overload protection disk is embedded in the groove of the secondary output gearwheel, and a spherical protrusion and a spherical groove that cooperate with each other are provided between the overload protection disk and the groove mating surface, and a clutch elastic component is provided on the secondary transmission shaft between the final input pinion and the front end cover and / or between the secondary output gearwheel and the partition on the front end cover side.

[0012] Preferably, an angle detection device for detecting the rotation angle of the power output shaft is installed on the output shaft inside the front end cover.

[0013] Preferably, the angle detection device includes a signal gear, which is the final output gearwheel; at least two permanent magnets are arranged on the end face of the final output gearwheel, and Hall sensors that respond to changes in the permanent magnet magnetic field are provided at the corresponding permanent magnet positions. The Hall sensors are installed on a PCB circuit board that judges the rotation angle of the final output gearwheel according to changes in the magnetic field. The PCB circuit board is electrically connected to the motor control mainboard, and the motor control mainboard is used to control the working state of the motor.

[0014] Preferably, the angle detection device includes a signal gear, which is the final output gearwheel; an arc groove is provided on the end face of the final output gearwheel, and an arc magnet with a gradually changing thickness is embedded in the arc groove. A Hall sensor responds to changes in the magnetic field of the permanent magnet, and the Hall sensor is installed on a PCB circuit board that judges the rotation angle of the final output gearwheel according to changes in the magnetic field. The PCB circuit board is installed on the front end cover, and the PCB circuit board is electrically connected to the motor control main board.

[0015] Preferably, the angle detection device includes a signal gear, which is the final output gearwheel; a brush is embedded on the end face of the final output gearwheel, and a PCB circuit board is installed on the front end cover at the brush position, and a carbon film resistor that cooperates with the brush is provided on the PCB circuit board, and the PCB circuit board is electrically connected to the motor control mainboard.

[0016] Preferably, the power output shaft is provided with an extreme limit block, and an annular boss is provided on the shaft hole on the inner side of the front end cover corresponding to the position of the extreme limit block, and an output shaft rotation limit platform is provided on the annular boss for limiting the extreme rotation angle of the output shaft in forward and reverse rotation.

[0017] The advantages and technical effects of this utility model are as follows: This electric flip-up drive has significant technical effects, especially in achieving a compact size and strong output torque while ensuring the stability of the automatic flip-up function of the smart toilet. The following is a summary of the specific technical effects:

[0018] Compact Structure and Optimized Functionality: A partition within the intermediate housing separates the drive into a power unit compartment and a transmission compartment. This effectively isolates the motor and reversing drive assembly from the transmission and power take-off shaft, improving operational stability and reliability. This compartmentalized design allows each compartment to focus on a specific function, optimizing space utilization and resulting in a more compact and organized internal structure.

[0019] Improved structural strength and durability: The housing consists of an intermediate housing, front cover, and rear cover. The segmented design facilitates the use of stronger materials or increased wall thickness, improving overall structural strength and reducing the risk of deformation. This enhances the stability and durability of the drive during long-term operation or when subjected to large reaction forces, extending its service life.

[0020] High transmission efficiency and performance: The independent design of the power unit and transmission compartments enables more efficient operation of the motor and transmission, reducing energy losses during transmission. The transmission utilizes a reduction gear pair to amplify torque, meeting the torque requirements of the flip-top system. This reduction gear pair also enhances transmission stability, resulting in a smoother and quieter flip-top operation.

[0021] Overload protection and safety: Overload protection mechanisms, such as elastic deformation units or overload protection discs, are incorporated into the transmission to effectively prevent damage to the motor and transmission components due to overload. This overload protection enhances the safety and reliability of the transmission, extends its service life, and improves the user experience.

[0022] Precise Angle Detection and Feedback: An angle detection device is installed on the output shaft inside the front cover to precisely measure the rotation angle of the drive shaft. This device transmits the drive shaft's position information, providing important feedback on the motor's operating status and ensuring the accuracy and stability of the cover's flipping action. This design enhances the user experience and makes the entire smart toilet system more stable and reliable.

[0023] In summary, this electric lid actuator achieves powerful torque output within a compact package and ensures the stability of the automatic lid flap function of smart toilets through its compact design, high-strength housing, efficient transmission, overload protection, and precise angle detection and feedback technology. These technical advantages collectively enhance the actuator's performance, reliability, and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model;

[0026] Figure 3 It is a schematic diagram of the structure without the rear end cover;

[0027] Figure 4 It is a schematic diagram of the structure without the front end cover;

[0028] Figure 5 It is a schematic diagram of the structure of the reversing gear pair and the transmission device;

[0029] Figure 6 1. It is a schematic diagram of the structure of the rear end cover side of the intermediate housing;

[0030] Figure 7 2. It is a schematic diagram of the three-dimensional structure of the rear end cover side of the intermediate housing;

[0031] Figure 8 1. It is a schematic diagram of the structure of the front cover side of the intermediate housing;

[0032] Figure 9 2. It is a schematic diagram of the three-dimensional structure of the front end cover side of the intermediate housing;

[0033] Figure 10 yes Figure 6 Middle AA section view;

[0034] Figure 11 and Figure 12 1. It is a schematic diagram of the three-dimensional structure of the rear end cover;

[0035] Figure 13 and Figure 14 2. It is a schematic diagram of the three-dimensional structure of the front end cover;

[0036] Figure 15 This is a schematic diagram of the structure of the overload protection mechanism in Example 1 of the present utility model;

[0037] Figure 16 yes Figure 15 Middle BB cross-section;

[0038] Figure 17 is a schematic diagram of the three-dimensional structure of the overload protection mechanism in Example 1;

[0039] Figure 18 is a schematic diagram of the three-dimensional structure of the elastic deformation portion in Example 1;

[0040] Figure 19 This is a schematic diagram of the D-shaped hole structure of the slewing sleeve of the overload protection mechanism;

[0041] Figure 20 This is a schematic diagram of the structure of the final stage input pinion that matches the D-shaped hole;

[0042] Figure 21 This is a schematic diagram of a square hole structure in which the mounting hole of the rotary sleeve of the overload protection mechanism is provided;

[0043] Figure 22 This is a schematic diagram of the structure of the final stage input pinion that fits with the square hole;

[0044] Figure 23 The mounting hole of the rotary sleeve of the overload protection mechanism is a schematic diagram of a diamond-shaped hole structure;

[0045] Figure 24 This is a schematic diagram of the structure of the final stage input pinion that matches the diamond hole;

[0046] Figure 25 This is a schematic diagram of the structure in which the mounting hole of the rotary sleeve of the overload protection mechanism is an oblong hole;

[0047] Figure 26 This is a schematic diagram of the structure of the final stage input pinion that matches the oblong hole;

[0048] Figure 27 This is a schematic diagram of the structure of a spline groove provided in the mounting hole of the rotary sleeve of the overload protection mechanism;

[0049] Figure 28 This is a schematic diagram of the structure of the final stage input pinion gear that cooperates with the spline groove;

[0050] Figure 29This is a schematic diagram of the structure of the overload protection mechanism in Example 2 of the present utility model;

[0051] Figure 30 yes Figure 29 Middle CC section view;

[0052] Figure 31 2 is a schematic structural diagram of a second embodiment of the angle detection device;

[0053] Figure 32a 2 is a schematic diagram of the structure of the arc-shaped magnet in the second embodiment of the angle detection device;

[0054] Figure 32b 2 is a schematic diagram of another arc-shaped magnet structure in the second embodiment of the angle detection device;

[0055] Figure 33 2 is a schematic structural diagram of a third embodiment of the angle detection device;

[0056] Figure 34 This is a schematic diagram of the brush structure in the third embodiment of the angle detection device.

[0057] In the figure, 10, intermediate housing; 101, partition; 102, power unit installation chamber; 103, transmission device installation chamber; 1040, first motor shaft end support plate; 1041, first motor tail end support plate; 105, first arc-shaped support groove; 106, reversing transmission chamber; 107, shaft head support platform; 108, wire accommodating chamber; 109, threading groove; 110, secondary transmission shaft rear axle seat; 111, output shaft shaft seat; 112, rear end cover mounting stop; 113, front end cover mounting stop; 114, first positioning sleeve; 115, second positioning sleeve; 116, external connection part; 117, groove; 20, front end cover; 201, shaft head press-fitting part; 202, primary transmission shaft front axle seat; 20 3. Front axle seat of secondary transmission shaft; 204. Shaft hole; 205. Limit stopper; 206. Annular boss; 207. Positioning column; 30. Rear end cover; 300. Shaft head press-fitting portion; 301. Rear axle seat of primary transmission shaft; 302. Second motor shaft end support plate; 303. Second motor tail end support plate; 304. Second arc-shaped support groove; 305. External connection outlet groove; 304. Positioning column; 40. Motor; 50. Reversing transmission pair; 51. Worm gear; 52. Worm; 60. Transmission device; 61. Secondary reduction input pinion; 601. Primary transmission shaft; 62. Secondary output gear; 621. Ring gear; 622. Groove; 63. Secondary transmission shaft; 64. Final input pinion; 640. Torsion portion; 641. Spline; 65. Final output gear; 70. Power output shaft; 80. Overload protection mechanism; 81. Elastic deformation portion; 810. Tooth connection portion; 82. Rotating sleeve; 820. Mounting hole; 821. Torsion surface; 822. Spline groove; 83. Fan-shaped deformation body; 84. Overload protection disk; 85. Spherical protrusion; 86. Spherical groove; 87. Clutch elastic member; 90. Angle detection device; 91. Permanent magnet; 92. PCB circuit board; 93. Arc groove; 94. Arc magnet; 95. Brush. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0059] Example 1, please refer to Figures 1 to 14, an electric flip cover drive, comprising a shell, a power device and a transmission device installed in the shell, and an output shaft connected to the transmission device, the shell comprising an intermediate shell 10 and a front cover 20 and a rear cover 30 installed at both ends of the intermediate shell; a partition 101 is provided in the intermediate shell, the partition divides the intermediate shell into two independent functional chambers, namely a power unit installation chamber 102 and a transmission device installation chamber 103; the power device installed in the power unit installation chamber includes a motor 40, which serves as a power source and provides rotational power to drive the entire system; the output end of the motor is connected to a reversing transmission pair 50 that can change the power transmission direction of the motor output shaft, which is used to convert the rotation direction of the motor into a direction perpendicular to the motor shaft to reduce the defect of direct connection and the large space occupied; the transmission device installation chamber is used to install a transmission device 60 for deceleration and a power output shaft 70, the transmission device with deceleration realizes torque amplification and thus drives the flip cover, and the power output shaft, as the final output component of the system, outputs the power transmitted by the transmission device to an external device or mechanism.

[0060] The operating principle of this electric flip-lid actuator is as follows: a motor 40 is installed in the power unit installation chamber 102 and serves as a power source to provide rotational power. The output end of the motor is connected to a reversing transmission pair 50, which can convert the motor's rotation direction to a direction perpendicular to the motor shaft, thereby reducing the space occupied by a direct connection. The converted power is transmitted to the transmission device 60 in the transmission device installation chamber 103. The transmission device has a speed reduction function, which can amplify the torque and thus drive the flip-lid. Finally, the power is output to an external device or mechanism, such as a toilet lid, through the power output shaft 70, to realize the flip-lid action.

[0061] The above electric flip drive has the following effects:

[0062] Structural separation and functional optimization:

[0063] A partition installed within the intermediate housing divides the housing into two independent functional chambers: the power unit compartment and the transmission compartment. This separation effectively isolates the motor, reversing drive assembly, transmission, and power take-off shaft from each other, improving the overall operational stability and reliability of the drive. Each chamber is dedicated to a specific function, optimizing space utilization and making the drive's internal structure more compact and organized.

[0064] Improved structural strength and durability:

[0065] The housing consists of an intermediate housing, a front cover, and a rear cover. This segmented design facilitates the use of stronger materials or thicker walls, thereby improving the overall structural strength of the housing and reducing the risk of deformation due to external forces. This enhances the stability and durability of the driver during long-term operation or when subjected to large reaction forces, extending its service life.

[0066] Simplified installation and maintenance:

[0067] By dividing the drive into multiple independent functional modules and installing them in separate compartments, the installation process is simplified. Users or maintenance personnel can more easily access and replace individual components, reducing maintenance costs and time. This modular design also helps quickly locate the problem in the event of a fault, improving repair efficiency.

[0068] Improve transmission efficiency and performance:

[0069] The separate design of the power unit and transmission compartments enables the motor and transmission to operate more efficiently, reducing energy loss during transmission and improving transmission efficiency. This design also helps optimize the transmission ratio and power output, allowing the driver to more accurately control the movement of the clamshell, improving overall performance.

[0070] Preferably, the reversing transmission pair is a single-stage reduction reversing gear pair, including a worm gear transmission pair consisting of a worm wheel 51 and a worm 52, a bevel gear pair consisting of two bevel gears, or an end gear transmission pair consisting of an end gear and a cylindrical gear.

[0071] From a design perspective, the present invention provides a variety of reversing transmission pair options, including worm gear transmission pairs, bevel gear pairs, and face gear transmission pairs. This embodiment prefers worm gear transmission pairs; these different transmission pairs have their own characteristics and can meet the performance requirements of different application scenarios and needs. For example, in situations where a high transmission ratio and good self-locking properties are required, a worm gear transmission pair can be selected; in applications that pursue compact structure and efficient transmission, a bevel gear pair is an ideal choice; and for scenarios that need to withstand large loads and maintain smooth transmission, the face gear transmission pair can perform excellently.

[0072] This highly selective design not only enhances the adaptability and flexibility of the electric clamshell actuator, but also enables manufacturers to select the most appropriate transmission pair solution for production and application based on specific needs and cost considerations. This not only helps optimize product performance, but also achieves cost control and maximizes benefits while meeting market demand.

[0073] From a market application perspective, the utility model's wide range of technical options also provides manufacturers of smart home products, such as smart toilets, with more choices and possibilities. They can flexibly select the appropriate electric flap actuator solution based on product positioning, target market, and specific consumer needs, thereby creating smart home products that better meet market demands and consumer expectations.

[0074] A first motor shaft end support plate 1040 and a first motor tail end support plate 1041 are provided in the power unit installation chamber 102 of the above-mentioned shell; a stable first motor accommodating space is formed between the first motor shaft end support plate and the first motor tail end support plate, which provides solid support for the motor, effectively prevents the motor from shaking and displacing during operation, and improves the stability and service life of the motor; the first motor shaft end support plate and the first motor tail end support plate are provided with a first arc-shaped support groove 105 for installing the motor; this enables the motor to be installed more snugly on the support plate, increases the contact area, and further improves the stability of the support and the heat dissipation effect of the motor.

[0075] An intermediate support plate 1042 is further provided between the first motor shaft end support plate and the first motor tail end support plate to further improve their stability. The ends of the first motor shaft end support plate and the first motor tail end support plate can extend to form an integral structure with the side wall, or they can not extend to the side wall to form an independent motor support structure.

[0076] The first motor shaft end support plate and the inner side of the upper portion of the intermediate housing enclose a reversing transmission chamber 106. The reversing transmission chamber provides an independent and protected working environment for the reversing transmission pair, reduces external interference, and improves the accuracy and reliability of the reversing transmission.

[0077] A shaft head support platform 107 is provided in the reversing transmission chamber, and a shaft head mounting groove 1071 is provided on the shaft head support platform; the shaft head mounting groove is in the same straight line as the center of the first arc-shaped support groove; a shaft head pressing portion 201 is provided on the rear end cover 20 at the position corresponding to the shaft head mounting groove, so that the shaft end of the power input shaft is kept in the shaft head mounting groove; the shaft head mounting groove on the shaft head support platform ensures the stable installation of the power input shaft or the transmission shaft, and cooperates with the shaft head pressing portion 201 on the rear end cover to form an effective clamping of the power input shaft, prevents the loosening and deviation of the shaft end, and improves the stability and efficiency of the transmission.

[0078] The second motor's rear end support plate and the lower interior of the intermediate housing form a wire storage chamber 108, which provides an organized and secure storage space for the driver's internal wires, preventing disorganization and interference, and enhancing overall aesthetics and safety. A wire threading trough 109 is located at the bottom of the partition, connecting the power unit installation chamber and the transmission installation chamber. This threading trough design ensures wire connectivity between the power unit installation chamber and the transmission installation chamber, facilitating wire layout and management while also ensuring stability and safety during wire transfer.

[0079] Preferably, the first motor shaft end support plate and the first motor tail end support plate are tilted relative to the center line of the intermediate housing, with an inclination angle of 0 to 45 degrees. This technical feature is also a new installation method that is different from traditional motor installation. Its technical effects are mainly reflected in the following aspects:

[0080] Optimizing space utilization: By tilting the first motor shaft end support plate and the first motor tail end support plate relative to the centerline of the intermediate housing, the overall size of the driver can be effectively reduced while ensuring a secure motor installation. This tilted design allows the motor to more closely fit the contours of the housing during installation, reducing wasted space.

[0081] Improved Compactness: The tilted support plate helps distribute the motor's weight and volume more evenly within the housing, improving overall structural compactness. This design streamlines the internal layout of the driver and aligns components more closely, contributing to improved overall stability and durability.

[0082] Enhanced Adaptability: The support plate's tilt angle is determined based on the motor's rated power and volume. This flexible design enhances the driver's adaptability to motors of varying specifications. Whether high- or low-power, the tilt angle can be adjusted to achieve optimal space utilization and assembly results.

[0083] Improved transmission efficiency: The tilted support plate also helps optimize the motor's transmission path, reducing energy loss during the transmission process. Because the relative positioning between the motor and transmission is more rational, transmission efficiency is improved, thereby improving the overall performance of the drive.

[0084] Preferably, a first-stage transmission shaft rear axle seat 301 is provided on the upper part of the rear end cover 30; a second motor accommodating space is provided corresponding to the position of the first motor accommodating space, and the first motor accommodating space and the second motor accommodating space are snapped together to form a motor accommodating cavity that is completely in contact with the outer wall of the motor; second arc-shaped support grooves 304 are provided on the second motor shaft end support plates 302 and the second motor tail end support plates 303 at both ends of the second motor accommodating space; an external connection outlet groove 305 is provided on the rear end cover or the intermediate shell.

[0085] This technical feature achieves stable support and compact layout for the two motors by setting a primary transmission shaft rear axle seat on the upper part of the rear end cover and adding a second motor accommodating space at the position corresponding to the first motor accommodating space. After the two motor accommodating spaces are buckled together, a motor accommodating cavity that fits perfectly with the outer wall of the motor is formed. This design not only optimizes space utilization, but also improves the installation stability and heat dissipation effect of the motor. At the same time, the second arc-shaped support grooves provided on the second motor shaft end support plates and the second motor tail end support plates at both ends of the second motor accommodating space further enhance the support strength and positioning accuracy of the motor. The external connection outlet groove provided on the rear end cover or the intermediate housing facilitates the connection of the motor wires, making the assembly process of the entire drive simpler and faster.

[0086] Preferably, the partition on the transmission device installation chamber side is provided with a secondary transmission shaft rear axle seat 110 for mounting the secondary transmission shaft and an output shaft seat 111 for mounting the output shaft. The upper portion of the front end cover 20 is provided with a primary transmission shaft front axle seat 202 corresponding to the primary transmission shaft rear axle seat and a secondary transmission shaft front axle seat 203 corresponding to the secondary transmission shaft rear axle seat; and a shaft hole 204 is provided on the front end cover corresponding to the output shaft seat position.

[0087] This technical feature achieves efficient installation and stable operation of the transmission system by carefully designing the layout of the transmission installation room and its related components. Specifically, the secondary drive shaft rear axle seat and output shaft seat set on the side partition of the transmission installation room provide stable support points for the secondary drive shaft and output shaft, ensuring accuracy and reliability during the transmission process. At the same time, the primary drive shaft front axle seat, secondary drive shaft front axle seat and corresponding shaft holes designed on the upper part of the front end cover not only form a perfect match with the shaft seat of the rear end cover, achieving stable support for the front and rear ends of the drive shaft and output shaft, but also further optimizes the overall structural layout, making the transmission system more compact and orderly. This design not only improves the transmission efficiency, but also enhances the stability and durability of the entire drive, providing a more reliable and efficient transmission solution for smart home products, thereby improving the overall performance and user experience of the product.

[0088] Preferably, an annular boss 205 is provided on the shaft hole on the inner side of the front end cover, and an output shaft rotation limiter 206 is provided on the annular boss for limiting the maximum rotation angle of the output shaft in forward and reverse rotation.

[0089] This technical feature achieves precise control of the output shaft's rotation angle by adding an annular boss to the shaft hole inside the front end cover and installing an output shaft rotation limiter on the boss. This design not only effectively limits the output shaft's maximum rotation angle during forward and reverse rotation, preventing mechanical damage or performance degradation caused by excessive rotation, but also improves the stability and reliability of the transmission system. Furthermore, the output shaft rotation limiter helps optimize the transmission system's operating range, ensuring operation within a predetermined angular range, thereby improving overall transmission efficiency and accuracy.

[0090] Preferably, a rear end cover mounting stop 112 is provided on the intermediate housing at the end of the power unit installation chamber; a stop is provided on the rear end cover; the rear end cover is fixedly connected to the rear end of the intermediate housing by ultrasonic welding, laser welding, or adhesive to form a whole; and / or, a front end cover mounting stop 113 is provided on the intermediate housing at the end of the transmission device installation chamber; a stop is provided on the front end cover; the front end cover is fixedly connected to the rear end of the intermediate housing by hot melting or adhesive to form a whole. This technical feature achieves a stable integration of the front end cover, the rear end cover, and the intermediate housing through a carefully designed connection method. Specifically, a rear end cover mounting stop and a front end cover mounting stop are respectively provided on the intermediate housing at the end of the power unit installation chamber and the transmission device installation chamber, which match the stops on the rear end cover and the front end cover, ensuring the accuracy and stability of the connection. At the same time, the front cover, the rear cover and the middle shell can be connected by snaps or bolts, and preferably by ultrasonic welding, laser welding or adhesives. This not only improves the connection strength, but also enhances the overall sealing and durability, effectively preventing loosening or damage caused by vibration or external force; it also simplifies the assembly process, improves production efficiency and reduces manufacturing costs.

[0091] Preferably, the partition is provided with a first positioning sleeve 114 extending toward the rear end cover for installation and positioning of the rear end cover; the rear end cover is provided with a positioning column 304; the partition is provided with a second positioning sleeve 115 extending toward the front end cover for installation and positioning of the front end cover; the front end cover is provided with a positioning column 207.

[0092] This technical feature achieves precise positioning and stable installation between components by providing specific positioning sleeves and positioning posts on the partition, rear end cover, and front end cover. Specifically, the first positioning sleeve 114 on the partition extends toward the rear end cover and cooperates with the positioning post 304 on the rear end cover, which not only ensures the accurate positioning of the rear end cover during installation, but also enhances the strength of the adjacent side walls through the special design at the corners, thereby improving the stability of the overall structure. At the same time, the second positioning sleeve 115 on the partition extends toward the front end cover and cooperates with the positioning post 207 on the front end cover to achieve precise positioning and installation of the front end cover. This design not only simplifies the installation process and improves installation efficiency, but also enhances the stability and reliability of the entire device through the close cooperation of the positioning sleeve and the positioning post, ensuring the performance and safety of the equipment during long-term operation.

[0093] The intermediate housing and / or rear end are provided with an external connection portion 116, which is provided with a connection hole or slot 117. This design significantly enhances the component's versatility and connectability. Through the connection holes or slots, the component can be easily connected and secured to other components or structures, simplifying the installation process and improving the overall structural stability and reliability. This flexible connection method makes the component more adaptable in different application scenarios.

[0094] Preferably, the transmission device is a reduction gear pair, including a secondary reduction input pinion 61 coaxially mounted on the primary transmission shaft 601 with the worm gear or driven bevel gear or cylindrical gear, the secondary reduction input pinion meshing with the secondary output gearwheel 62, the secondary output gearwheel being mounted between the partition and the front end cover through the secondary transmission shaft 63; the secondary output gearwheel is connected to the final input pinion 64 through the overload protection mechanism 80, the final input pinion meshing with the final output gearwheel 65, the final output gearwheel being mounted on the power output shaft 70, the power output shaft being mounted on the partition and the front end cover, and the power output shaft extending out of the front end cover.

[0095] As the core component of the electric flip-top drive, the design and performance of the transmission device directly affect the overall performance of the drive. In the present invention, the transmission device adopts a reduction gear pair, which brings significant advantages. First, the reduction gear pair can achieve torque amplification. Due to the limited output torque of the motor, direct drive may not be able to meet the torque required for the flip-top. The reduction gear pair reduces the speed of the motor through the meshing of the gears and amplifies the torque at the same time, allowing the drive to output greater torque to meet the requirements of the flip-top. Second, the reduction gear pair can improve the smoothness of the transmission. The meshing transmission method of the gear pair is smooth and reliable, which can effectively reduce the impact and vibration during the transmission process, making the flip-top action smoother and quieter. In addition, the reduction gear pair has the advantages of compact structure and strong load-bearing capacity. Through reasonable gear design and layout, a large reduction ratio can be achieved in a small space while bearing a large load, meeting the volume and load-bearing capacity requirements of the electric flip-top drive.

[0096] Furthermore, the reduction gear pair of the present invention can be designed with multiple reduction stages based on actual needs. In addition to the aforementioned secondary and final reduction stages, additional reduction stages can be added based on specific application scenarios and requirements. This multi-stage reduction design can further amplify torque, improve transmission smoothness and reliability, and better adapt to different application scenarios and requirements.

[0097] In the transmission device of the electric flip cover drive, the design of connecting the secondary output large gear to the final input small gear through an overload protection mechanism brings significant technical effects to the entire transmission system.

[0098] First, the inclusion of an overload protection mechanism significantly enhances the safety and reliability of the transmission. Under normal operating conditions, the overload protection mechanism ensures stable transmission between the secondary output gear and the final input gear, ensuring smooth flip-up operation. However, if the transmission system experiences an overload, such as unusual resistance or a jam, the overload protection mechanism immediately activates, severing or weakening the transmission connection, effectively preventing damage to the motor and transmission components due to overload.

[0099] Secondly, the overload protection mechanism helps to extend the service life of the electric flip cover drive. By timely cutting off the overload transmission, the mechanism can prevent the transmission components from being worn or deformed due to long-term excessive load, thereby maintaining the good condition of the transmission system and extending its service life.

[0100] The overload protection mechanism also enhances the user experience of the electric flip drive. In the event of an abnormal situation, the mechanism can quickly respond and cut off the transmission, preventing abnormal flip movement or jamming, thereby ensuring smooth and comfortable use.

[0101] The addition of an overload protection mechanism to the transmission device of the electric flip cover drive undoubtedly adds more reliability and safety. Specifically, the present invention provides two technical solutions for the overload protection mechanism, each of which brings unique technical effects and can be selected according to actual needs.

[0102] Specifically, the overload protection mechanism described in Example 1 employs the following technical solution: the overload protection mechanism 80 includes an elastic deformation portion 81 connected to the final input pinion 64. The elastic deformation portion includes a rotating sleeve 82, the outer circumference of which is provided with at least two sector-shaped deformation bodies 83, with spaces between adjacent sector-shaped deformation bodies. The outer surfaces of the sector-shaped deformation bodies are provided with toothed portions 810, which mesh with the meshing inner ring 621 of the secondary output gear 62. When the transmission system encounters an overload, the sector-shaped deformation bodies deform due to the excessive force, thereby changing the meshing state between the toothed portions and the meshing inner ring, severing or weakening the transmission connection. This design is not only simple in structure and easy to implement, but also has a rapid response and significant protection effect.

[0103] Furthermore, the rotating sleeve and the overload protection plate are connected to the final input pinion in an integrated structure, or they can be a separate structure; for example, the center of the rotating sleeve is provided with a mounting hole 820, which is a D-shaped hole (see Figure 19 and Figure 20 ), square hole (see Figure 21 and Figure 22 ), diamond-shaped holes (see Figure 23 and Figure 24 ) or oblong holes (see Figure 25 and Figure 26 ), it can also be rectangular or triangular; at least one torsion surface 821 for driving the rotary sleeve to rotate is provided in the mounting hole, and a torsion portion 640 having the same cross-sectional shape as the mounting hole is provided on the end of the final input pinion 64 on the overload protection component side.

[0104] For example, the rotary sleeve and the final stage input pinion 64 are connected by a key, see Figure 27 and Figure 28 In this embodiment, a spline groove 822 is provided at the center of the rotating sleeve, and a spline 641 is provided at the end of the final stage input pinion gear to cooperate with the spline groove.

[0105] Both an integrated design and a detachable connection between the slewing sleeve and the final-stage input pinion have their advantages. The integrated design is suitable for applications requiring compactness, transmission efficiency, and reliability; the detachable connection is more suitable for applications requiring frequent maintenance and component replacement or achieving modular design. In practical applications, the appropriate connection method should be selected based on specific needs and conditions.

[0106] Example 2, please refer to Figure 29 and Figure 30 The overload protection mechanism adopts the following technical solution; the overload protection mechanism includes an overload protection disk 84 connected to the final input pinion, the overload protection disk is embedded in the groove 622 of the secondary output gearwheel, and a spherical protrusion 85 and a spherical groove 86 that cooperate with each other are provided between the overload protection disk and the groove mating surface. A clutch elastic component 87 is provided on the secondary transmission shaft between the final input pinion and the front end cover and / or between the secondary output gearwheel and the partition on the front end cover side. The clutch elastic component is preferably a spring or a butterfly spring.

[0107] This embodiment uses a method in which the overload protection disk cooperates with the groove of the secondary output gear. The overload protection disk is connected to the final input pinion and embedded in the groove of the secondary output gear. On the mating surface of the overload protection disk and the groove, spherical protrusions and spherical grooves that cooperate with each other are cleverly set, and the necessary elastic force is provided for the entire mechanism through the clutch elastic component. When the transmission system is overloaded, the spherical protrusion will be squeezed and moved, thereby changing the mating state of the overload protection disk and the groove in the secondary output gear, cutting off the transmission connection. This design not only has a significant protection effect, but also has a long service life and high stability.

[0108] In summary, both overload protection solutions offer significant benefits. The first, with its core sector-shaped deformable element, achieves a simple and rapid protection response; the second, through the clever combination of spherical protrusions and grooves, provides more stable and long-lasting protection. In practical applications, the appropriate overload protection solution can be selected based on specific needs and scenarios, ensuring a safer and more reliable transmission mechanism for electric clamshell actuators.

[0109] Further preferably, on the basis of the above-mentioned embodiment 1 or embodiment 2, an angle detection device 90 for detecting the rotation angle of the power output shaft is installed on the output shaft on the inner side of the front end cover, and the one-way rotation angle of the power output shaft is 0-120 degrees; the actual preferred maximum opening angle is 110 degrees.

[0110] The inclusion of an angle detection device plays a crucial role in the design of a powered clamshell actuator. This device, cleverly mounted on the output shaft inside the front cover, accurately detects the rotational angle of the drive shaft. Electrically connected to the control board, the angle detection device not only transmits real-time position information about the drive shaft but also provides crucial feedback on the motor's operating status.

[0111] Its importance lies first in the precise control of the lid's flap action. The lid of a smart toilet must precisely adhere to a set angle to ensure the desired effect every time it is used. The angle detection device is the guardian of this process, constantly monitoring the rotation of the drive shaft to ensure that the lid flips into place accurately at the set angle.

[0112] The angle detection device also plays a key role in enhancing the user experience. By detecting and providing real-time feedback on the drive shaft's position, it enables precise control of the motor's operating state. This means that whenever the user uses the smart toilet, the lid opens and closes smoothly and steadily, providing a more comfortable and convenient experience.

[0113] From a broader perspective, the addition of the angle detection device also helps improve the stability and reliability of the entire smart toilet system. By providing real-time monitoring and feedback on the motor's operating status, the device can promptly detect and address any potential anomalies, effectively preventing various problems caused by inaccurate drive shaft rotation angles.

[0114] The above-mentioned angle detection devices include two non-contact types and one contact type, as follows:

[0115] The first solution of the angle detection device 90: please refer to Figure 4 The angle detection device includes a signal gear, which is the final output gearwheel 65; at least two permanent magnets 91 are set on the end face of the final output gearwheel, and Hall sensors that respond to changes in the permanent magnet magnetic field are set at the corresponding permanent magnet positions. The Hall sensors are installed on a PCB circuit board 92 that determines the rotation angle of the final output gearwheel according to the magnetic field changes. The PCB circuit board is electrically connected to the motor control mainboard, which is used to control the working state of the motor.

[0116] This angle detection device operates on the principle of fixed-point discrete angle detection. Specifically, it uses the final output gear as the signal gear and places permanent magnets on its end face. These magnets generate a changing magnetic field as the gear rotates.

[0117] A Hall effect sensor is a component that responds to changes in magnetic field. When a permanent magnet approaches or moves away from the sensor as the gear rotates, the sensor outputs a corresponding electrical signal. These Hall effect sensors are mounted on a printed circuit board (PCB), which uses the electrical signals output by the Hall effect sensors to determine the rotation angle of the final output gear. Specifically, the processing circuitry on the PCB decodes and processes the Hall effect sensor output signals to determine the current position, or rotation angle, of the gear.

[0118] For example, if five permanent magnets are placed within a ±120° rotation angle range, with adjacent permanent magnets at a 30° center angle, each permanent magnet will approach and trigger its corresponding Hall effect sensor as the gear rotates. This allows the circuit board to detect the gear's rotation angle with a 30° resolution and achieve precise angular control.

[0119] Finally, the PCB is electrically connected to the motor control motherboard, transmitting the detected angle information to the motherboard. The motor control motherboard then controls the motor's operating state based on this information, ensuring that the flip cover can flip to the set angle.

[0120] The second solution of angle detection device: please refer to Figure 31 and Figure 32a and Figure 32b The angle detection device includes a signal gear, which is the final output gearwheel 65; an arc groove 93 is provided on the end face of the final output gearwheel, in which an arc magnet 94 with a gradually changing thickness is embedded, and a Hall sensor that responds to changes in the permanent magnet's magnetic field is installed on a PCB circuit board 92 that determines the rotation angle of the final output gearwheel according to changes in the magnetic field. The PCB circuit board is installed on the front end cover, and the PCB circuit board is electrically connected to the motor control main board.

[0121] This angle detection device utilizes the principle of continuous linear angle detection. Its core components include the final output gear, which serves as the signal gear, and a specially designed arc groove on the end face of the final output gear. This groove houses a gradually varying arc-shaped magnet, which is the key to achieving continuous linear angle detection.

[0122] When the final output gear rotates, the arc-shaped magnet also rotates. Because its thickness is gradually changing, the magnetic field strength generated by it also changes continuously with the rotation angle. This continuous change in magnetic field strength makes it possible to continuously detect angles.

[0123] To detect this continuously changing magnetic field, the device is equipped with a Hall effect sensor. Mounted on a printed circuit board (PCB), the sensor generates an electrical signal that determines the rotation angle of the final output gear. Specifically, as the arc-shaped magnet rotates, the Hall effect sensor senses the change in magnetic field strength and converts it into an electrical signal. Processing circuitry on the PCB decodes and processes this signal to determine the current rotation angle of the final output gear.

[0124] Finally, the PCB is electrically connected to the motor control motherboard, transmitting the detected angle information to the motherboard in real time. Based on this information, the motor control motherboard controls the motor's operating state, ensuring that the flip cover flips to the desired angle. By utilizing the principle of continuous linear angle detection, this device achieves more precise and stable angle control.

[0125] Applied to smart toilet lids, the rotation angle is typically 0-120 degrees. Electric flap actuators are installed on both sides, with the closed position set to 0 degrees. During operation, the motor controller receives signals from the PCB and drives the motor on one side to rotate 110 degrees clockwise and 110 degrees counterclockwise to open the toilet lid. A Hall effect sensor monitors magnetic field changes in real time, converting them into electrical signals to ensure accurate rotation angles. The maximum opening angle of the toilet lid is 90-120 degrees. The coordinated operation of the two actuators enables intelligent control of the opening and closing of the toilet lid.

[0126] The optional model of the Hall sensor in the first and second solutions of the above-mentioned angle detection device is the 49E Hall sensor.

[0127] The third solution of angle detection device: please refer to Figure 33 and Figure 34 The angle detection device 90 includes a signal gear, which is the final output gear 65; a brush 95 is embedded on the end face of the final output gear, and a PCB circuit board 92 is installed on the front cover of the brush position. The PCB circuit board is provided with a carbon film resistor that cooperates with the brush, and the PCB circuit board is electrically connected to the motor control main board.

[0128] This angle detection device utilizes contact-type angle detection, specifically a resistive-type angle detection system. Its core components include a large final output gear, which serves as a signal gear, with brushes embedded on its end face. Furthermore, a PCB (Printed Circuit Board) is mounted on the front cover, housing carbon film resistors that interact with the brushes.

[0129] When the final output gear begins to rotate, the brushes also rotate and come into contact with the carbon film resistors on the PCB. The carbon film resistors are designed so that their resistance varies with position. Therefore, as the brushes rotate and come into contact with the carbon film resistors at different locations, a varying resistance value is formed. This varying resistance value has a one-to-one correspondence with the rotation angle of the final output gear.

[0130] To detect this change in resistance, the device establishes an electrical connection with the motor control motherboard via a PCB. This change in resistance is converted into an electrical signal and transmitted to the motor control motherboard. The motherboard uses this signal to determine the rotation angle of the final output gear and further control the motor's operating state, ensuring the cover flips precisely to the desired angle.

[0131] The above three solutions each have unique effects and are suitable for different application scenarios.

[0132] First, the common advantage of the first two non-contact angle detection devices is that they can achieve angle detection without physical contact, thereby reducing the possibility of wear and failure. Specifically, the first solution sets a permanent magnet on the end face of the final output gear and uses a Hall sensor to detect changes in the magnetic field to determine the rotation angle of the gear. This design has a simple structure and a fast response, and the non-contact detection method between the permanent magnet and the Hall sensor ensures long-term stability and reliability. The second solution uses an arc-shaped magnet embedded in the arc-shaped groove of the final output gear, and also uses a Hall sensor to detect changes in the magnetic field to achieve angle detection. This design further optimizes the distribution of the magnetic field and detection accuracy, thereby improving the accuracy of angle detection.

[0133] Contact-type angle detection devices detect angles through contact between brushes and a carbon film on a PCB. This design may offer advantages in certain applications, such as adaptability to extreme environments or special operating conditions. However, due to the risk of wear and poor contact, contact detection may offer slightly lower long-term stability and reliability than non-contact solutions.

[0134] Preferably, the power output shaft is provided with a limit stop block 205, and an annular boss 206 is provided on the shaft hole on the inner side of the front end cover corresponding to the position of the limit stop block, and an output shaft rotation limit platform is provided on the annular boss for limiting the maximum rotation angle of the output shaft in forward and reverse rotation.

[0135] This technical feature achieves precise control of the output shaft's rotation angle by adding an annular boss 205 to the shaft hole inside the front end cover and arranging an output shaft rotation limiter 206 on the boss. This design not only effectively limits the output shaft's maximum rotation angle during forward and reverse rotation, preventing mechanical damage or performance degradation caused by excessive rotation, but also improves the stability and reliability of the transmission system. Furthermore, the output shaft rotation limiter helps optimize the transmission system's operating range, ensuring operation within a predetermined angular range, thereby improving overall transmission efficiency and accuracy.

[0136] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electric flip-top actuator comprising a housing, a power device and a transmission device mounted within the housing, and an output shaft connected to the transmission device, characterized in that: The shell includes an intermediate shell and a front cover and a rear cover installed at both ends of the intermediate shell; a partition is provided in the intermediate shell, which divides the intermediate shell into two independent functional chambers, namely the power unit installation chamber and the transmission device installation chamber; a motor is installed in the power unit installation chamber, and the output end of the motor is connected to a reversing transmission pair that can change the power transmission direction of the motor output shaft; the transmission device installation chamber is used to install a transmission device for deceleration and a power output shaft.

2. The electric flip-cover driver according to claim 1, characterized in that: The reversing transmission pair is a first-stage reduction reversing gear pair, including a worm gear transmission pair consisting of a worm wheel and a worm, a bevel gear pair consisting of two bevel gears, or an end gear transmission pair consisting of an end gear and a cylindrical gear.

3. The electric flip-cover driver according to claim 1, characterized in that: The transmission device is a reduction gear pair, including a secondary reduction input pinion coaxially mounted on the primary transmission shaft with the worm gear or driven bevel gear or cylindrical gear, the secondary reduction input pinion meshing with the secondary output gearwheel, the secondary output gearwheel being mounted between the partition and the front end cover through the secondary transmission shaft; the secondary output gearwheel is connected to the final input pinion through an overload protection mechanism, the final input pinion meshing with the final output gearwheel, the final output gearwheel being mounted on the power output shaft, the power output shaft being mounted on the partition and the front end cover, and the power output shaft extending out of the front end cover.

4. The electric flip-cover driver according to claim 3, characterized in that: The overload protection mechanism includes an elastic deformation part connected to the final input pinion, and the elastic deformation part includes a rotating sleeve. The outer circumference of the rotating sleeve is provided with at least two sector-shaped deformation bodies, and there is a gap between adjacent sector-shaped deformation bodies; the outer surface of the sector-shaped deformation body is provided with a tooth connection part, and the tooth connection part is engaged with the inner gear ring of the secondary output large gear.

5. The electric flip-cover driver according to claim 3, characterized in that: The overload protection mechanism includes an overload protection disk connected to the final input pinion, and the overload protection disk is embedded in the groove of the secondary output gearwheel. A spherical protrusion and a spherical groove that cooperate with each other are provided between the overload protection disk and the groove mating surface. A clutch elastic component is provided on the secondary transmission shaft between the final input pinion and the front end cover and / or between the secondary output gearwheel and the partition on the front end cover side.

6. The electric flip-cover driver according to claim 1, characterized in that: An angle detection device for detecting the rotation angle of the power output shaft is installed on the output shaft inside the front end cover.

7. The electric flip-cover driver according to claim 6, characterized in that: The angle detection device includes a signal gear, which is the final output gearwheel; at least two permanent magnets are arranged on the end face of the final output gearwheel, and Hall sensors that respond to changes in the permanent magnet magnetic field are provided at the corresponding permanent magnet positions. The Hall sensors are installed on a PCB circuit board that determines the rotation angle of the final output gearwheel according to the magnetic field changes. The PCB circuit board is electrically connected to the motor control mainboard, and the motor control mainboard is used to control the working state of the motor.

8. The electric flip-cover driver according to claim 6, characterized in that: The angle detection device includes a signal gear, which is the final output gearwheel; an arc groove is provided on the end face of the final output gearwheel, in which an arc magnet with a gradually changing thickness is embedded, and a Hall sensor that responds to changes in the magnetic field of the permanent magnet is installed on a PCB circuit board that determines the rotation angle of the final output gearwheel according to changes in the magnetic field. The PCB circuit board is installed on the front end cover, and the PCB circuit board is electrically connected to the motor control main board.

9. The electric flip-cover driver according to claim 6, characterized in that: The angle detection device includes a signal gear, which is the final output gearwheel; a brush is embedded on the end face of the final output gearwheel, and a PCB circuit board is installed on the front end cover at the brush position. The PCB circuit board is provided with a carbon film resistor that cooperates with the brush, and the PCB circuit board is electrically connected to the motor control mainboard.

10. The electric flip-cover driver according to claim 1, characterized in that: The power output shaft is provided with an extreme limit block, and an annular boss is provided on the shaft hole on the inner side of the front end cover corresponding to the position of the extreme limit block. The annular boss is provided with an output shaft rotation limit platform for limiting the extreme rotation angle of the output shaft in forward and reverse rotation.

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