A self-locking planetary gearbox structure

Abstract

The utility model relates to electric curtain planetary gear box field especially, a kind of with self-locking planetary gear box structure. Including mounting panel and connecting structure, the side of mounting panel is provided with motor, the motor is connected with mounting panel by means of connecting structure, the end of motor away from mounting panel is equipped with connecting plate, the output end of motor is equipped with first sun gear, the side of connecting plate away from motor is equipped with gear box shell, the inside of gear box shell is equipped with first layer inner tooth ring, the inside of gear box shell is equipped with output inner tooth ring, the inner wall of output inner tooth ring is provided with planet carrier, the inside of planet carrier is equipped with several planetary gears. The utility model provides a kind of with self-locking planetary gear box structure has in the operation process of electric curtain position locking at any time, to effectively improve the curtain control precision and stability, ensure the accurate positioning advantage after the shutdown of curtain.

Description

Technical Field

[0001] This utility model relates to the field of planetary gearboxes for electric curtains, and in particular to a planetary gearbox structure with a self-locking mechanism. Background Technology

[0002] Planetary gearboxes are key transmission devices commonly used in electric curtain systems. They convert the rotational motion of the motor into the translational or lifting motion of the curtains through a planetary gear transmission structure. The core advantages of planetary gearboxes lie in their compact size, high efficiency, and high torque transmission capability, making them widely used in electric curtains that require precise control and handle large loads.

[0003] Existing technologies, such as the utility model patent with publication number CN221120822U, disclose a high-efficiency DC geared motor for electric curtains. This patent employs a motor and a gear reducer used in conjunction with it. The gear reducer includes a multi-stage planetary gear transmission assembly that meshes sequentially. The planetary gear transmission assembly includes a first-stage planetary gear transmission assembly, intermediate planetary gear transmission assemblies, and a final-stage planetary gear transmission assembly. The speed ratio of the first-stage planetary gear transmission assembly is (41:7+1), the speed ratio of the intermediate planetary gear transmission assembly is (38:10+1), and the speed ratio of the final-stage planetary gear transmission assembly is (38:10+1). The total speed ratio of the gear reducer is (41:7+1)×(38:10+1)×(38:10+1). This application effectively improves the efficiency of the DC geared motor.

[0004] The inventors discovered during daily use that in existing technologies, the planetary gearboxes of electric curtains typically lack a self-locking function. Therefore, after the electric curtains stop operating, external factors (such as wind or vibration) may cause the curtains to shift position, affecting their stability. Furthermore, the lack of a self-locking mechanism reduces the precision of curtain position control, especially when the curtains remain in one position for an extended period, potentially causing them to fail to maintain their intended angle or position. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a self-locking planetary gearbox structure.

[0006] To solve the above-mentioned technical problems, this utility model provides a self-locking planetary gearbox structure, including: a mounting plate and a connecting structure. A motor is disposed on one side of the mounting plate, and the motor is connected to the mounting plate via the connecting structure. A connecting plate is mounted on the end of the motor away from the mounting plate. A first sun gear is mounted on the output end of the motor. A gearbox housing is mounted on the side of the connecting plate away from the motor. A first internal gear ring is mounted inside the gearbox housing. An output internal gear ring is mounted inside the gearbox housing. A planet carrier is disposed on the inner wall of the output internal gear ring. A plurality of planet gears are mounted inside the planet carrier. The sides of the plurality of planet gears that are close to each other are all engaged with the first sun gear. The sides of the planet gears that are away from the first sun gear are respectively engaged with the output... An internal gear ring meshes with a first-layer internal gear ring. An injection-molded insert is installed inside the gearbox housing, meshing with the output internal gear ring. An oil-impregnated bearing is installed inside the injection-molded insert, and an output shaft is installed inside the oil-impregnated bearing. A gearbox body is installed at the end of the gearbox housing furthest from the motor. An output component is installed inside the gearbox housing, and a drive shaft is installed on the inner wall of the output component. An internal gear ring body is installed inside the gearbox body, and a planetary gear cover is installed inside the internal gear ring body. Several planetary gear shafts are installed inside the planetary gear cover, and planetary gear bodies are installed on the arcuate surfaces of the planetary gear shafts. A second sun gear is installed on the arcuate surface of the output shaft, and the second sun gear meshes with the planetary gear body.

[0007] The effect achieved by the above components is as follows: The gearbox is divided into two layers. The first layer is a normal NGW-type planetary gearbox transmission. The second layer planetary gear body is the same as the first layer planetary gear. The transmission from the first layer planetary gear to the second layer planetary gear body is through the internal gear ring body (the second layer internal gear ring is a non-fixed part), which drives the output shaft to output. The output shaft drives the second sun gear of the output layer, and then the second sun gear drives the second layer planetary gear body. The second layer planetary gear body drives the internal gear ring body, the internal gear ring drives the transmission shaft, and the transmission shaft drives the output component to output.

[0008] Preferably, the inner wall of the mounting plate is provided with a connecting structure, the connecting structure including four sliding grooves, the four sliding grooves being formed on the mounting plate, a slider being slidably connected to the inner wall of the sliding groove, a clamping plate being fixedly connected to the side of the slider away from the mounting plate, a retaining ring abutting the sides of the four clamping plates that are away from each other, and a spring being provided inside the sliding groove, the two ends of the spring being fixedly connected to the slider and the sliding groove respectively.

[0009] The effect achieved by the above components is as follows: when it is necessary to connect the motor to the mounting plate, the motor is pulled to move it, the motor is placed between the clamping plates, and then the clamping plates are pulled to move it. The clamping plates drive the slider to move, the slider slides on the inner wall of the groove, the slider drives the spring to stretch, then the retaining ring is put on the clamping plate, and then the clamping plate presses and fixes the motor. Then the spring's rebound force drives the clamping plate and the retaining ring to abut and fix it.

[0010] Preferably, each of the four clamping plates is fixedly connected to an anti-slip pad on one side that is close to each other, and the anti-slip pad is a rubber pad.

[0011] The effect achieved by the above components is that the anti-slip pad can increase the friction between the clamp and the motor, preventing the clamp from sliding when clamping and fixing the motor.

[0012] Preferably, a limiting rod is fixedly connected inside the groove, and the limiting rod is slidably connected to a slider.

[0013] The effect achieved by the above components is that the limiting rod can limit the slider, prevent the slider from deviating during use, and improve the stability of the slider sliding.

[0014] Preferably, the limiting rod has a circular cross-section, and the spring is sleeved on the arc surface of the limiting rod.

[0015] The effect achieved by the above components is that the limiting rod can limit the spring, prevent the spring from deforming during use, and improve the service life of the spring.

[0016] Preferably, the outer surface of the clamping plate and the inner surface of the retaining ring are relatively rough, and the cross-section of the clamping plate is arc-shaped.

[0017] The effect achieved by the above components is that the roughness of the outer surface of the clamping plate and the inner surface of the retaining ring can increase the friction between the retaining ring and the clamping plate, and prevent slippage when the clamping plate and the retaining ring are abutted and fixed.

[0018] Compared with related technologies, the self-locking planetary gearbox structure provided by this utility model has the following advantages:

[0019] By designing the overall structure, existing technologies often lack a self-locking function in the planetary gearbox of motorized curtains. Therefore, after the motorized curtain stops operating, external factors (such as wind or vibration) may cause the curtain's position to shift, affecting its stability. Furthermore, the lack of a self-locking mechanism reduces the accuracy of curtain position control, especially when the curtain remains in one position for an extended period; the angle or position of the curtain may not maintain the intended state. To address this issue, this device, through optimized design, enables position locking during the operation of the motorized curtain, effectively improving the curtain's control accuracy and stability, and ensuring precise positioning of the curtain after it stops.

[0020] By setting up a connection structure, the entire gearbox can be easily and quickly installed and disassembled, avoiding difficulties in regular maintenance of the gearbox. Attached Figure Description

[0021] Figure 1 A structural schematic diagram of a self-locking planetary gearbox structure provided by this utility model;

[0022] Figure 2 for Figure 1 The exploded view of the gearbox shown;

[0023] Figure 3 for Figure 2 The diagram shows a partial structural representation.

[0024] Figure 4 for Figure 1 The diagram shows the connection structure.

[0025] Figure 5 for Figure 4 The enlarged view of point A shown.

[0026] The following components are labeled in the diagram: 1. Mounting plate; 2. Motor; 3. Gearbox housing; 4. Connecting plate; 5. First sun gear; 6. First internal gear ring; 7. Planetary carrier; 8. Output internal gear ring; 9. Injection-molded insert; 10. Oil-impregnated bearing; 11. Output shaft; 12. Connecting structure; 121. Slide groove; 122. Snap ring; 123. Clamping plate; 124. Anti-slip pad; 125. Limiting rod; 126. Slider; 127. Spring; 13. Planetary gear; 14. Second sun gear; 15. Planetary gear shaft; 16. Planetary gear body; 17. Planetary gear cover; 18. Internal gear ring body; 19. Gearbox body; 20. Drive shaft; 21. Output component. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0028] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0029] Please see Figures 1 to 5 This utility model provides a self-locking planetary gearbox structure, comprising: a mounting plate 1 and a connecting structure 12. A motor 2 is disposed on one side of the mounting plate 1, and the motor 2 is connected to the mounting plate 1 via the connecting structure 12. A connecting plate 4 is mounted on the end of the motor 2 away from the mounting plate 1. A first sun gear 5 is mounted on the output end of the motor 2. A gearbox housing 3 is mounted on the side of the connecting plate 4 away from the motor 2. A first internal gear ring 6 is mounted inside the gearbox housing 3. An output internal gear ring 8 is mounted inside the gearbox housing 3. A planet carrier 7 is disposed on the inner wall of the output internal gear ring 8. A plurality of planet gears 13 are mounted inside the planet carrier 7. The sides of the plurality of planet gears 13 that are close to each other are all engaged with the first sun gear 5. The sides of the planet gears 13 that are away from the first sun gear 5 are respectively engaged with the output internal gear ring 8 and the first internal gear ring 6. The internal gear ring 6 meshes with the gearbox housing 3. The gearbox housing 3 has an injection-molded insert 9 installed inside, which meshes with the output internal gear ring 8. The injection-molded insert 9 has an oil-impregnated bearing 10 installed inside, and the oil-impregnated bearing 10 has an output shaft 11 installed inside. The gearbox housing 3 is equipped with a gearbox body 19 at the end away from the motor 2. The gearbox housing 3 has an output component 21 installed inside, and a drive shaft 20 is installed on the inner wall of the output component 21. The gearbox body 19 has an internal gear ring body 18 installed inside, and a planetary gear cover 17 is installed inside the internal gear ring body 18. Several planetary gear shafts 15 are installed inside the planetary gear cover 17. The planetary gear body 16 is installed on the arc surface of the planetary gear shaft 15. The second sun gear 14 is installed on the arc surface of the output shaft 11, and the second sun gear 14 meshes with the planetary gear body 16. The gearbox has two layers. The first layer is a normal NGW-type planetary gearbox transmission. The second layer planetary gear body 16 is the same as the first layer planetary gear 13. The first layer planetary gear 13 transmits to the second layer planetary gear body 16. The second layer gear transmission outputs through the internal gear ring body 18 (the second layer internal gear ring is a non-fixed component), which drives the output shaft 11 to output. The output shaft 11 drives the second sun gear 14 of the output layer, which in turn drives the second layer planetary gear body 16. The second layer planetary gear body 16 drives the internal gear ring body 18, which drives the transmission shaft 20. The transmission shaft 20 drives the output component 21 to output.

[0030] In the embodiments of this utility model, please refer to Figure 4 and Figure 5The inner wall of the mounting plate 1 is provided with a connecting structure 12, which includes four sliding grooves 121. The four sliding grooves 121 are formed on the mounting plate 1. A slider 126 is slidably connected to the inner wall of the sliding groove 121. A clamping plate 123 is fixedly connected to the side of the slider 126 away from the mounting plate 1. The four clamping plates 123 are abutted against each other on the sides away from each other. A spring 127 is provided inside the sliding groove 121. The two ends of the spring 127 are fixedly connected to the slider 126 and the sliding groove 121 respectively. When it is necessary to connect motor 2 to mounting plate 1, pull motor 2 to move it, placing motor 2 between clamping plates 123. Then pull clamping plate 123 to move it, causing clamping plate 123 to move slider 126. Sliding slider 126 slides on the inner wall of slide groove 121, and slider 126 stretches spring 127. Then, retaining ring 122 is put on clamping plate 123, and clamping plate 123 presses and fixes motor 2. Then, the rebound force of spring 127 causes clamping plate 123 to abut and fix retaining ring 122. Anti-slip pads 124 are fixedly connected to the sides of the four clamping plates 123 that are close to each other. Anti-slip pads 124 are rubber pads. Anti-slip pads 124 can increase the friction between clamping plate 123 and motor 2, preventing clamping plate 123 from sliding when clamping and fixing motor 2. Limiting rod 125 is fixedly connected inside slide groove 121, and limiting rod 125 is slidably connected to slider 126. The limiting rod 125 can limit the slider 126, preventing it from shifting during use and improving the stability of its sliding. The limiting rod 125 has a circular cross-section, and the spring 127 is fitted onto its arc surface. The limiting rod 125 can also limit the spring 127, preventing it from deforming during use and improving its service life. The outer surface of the clamping plate 123 and the inner surface of the retaining ring 122 are relatively rough, and the cross-section of the clamping plate 123 is arc-shaped. The roughness of the outer surface of the clamping plate 123 and the inner surface of the retaining ring 122 increases the friction between them, preventing slippage when they are in contact.

[0031] The working principle of the self-locking planetary gearbox structure provided by this utility model is as follows: The gearbox is divided into two layers. The first layer is a normal NGW-type planetary gearbox transmission. The second layer planetary gear body 16 and the first layer planetary gear 13 are the same body. The first layer planetary gear 13 transmits to the second layer planetary gear body 16. The second layer gear transmission is output by the internal gear ring body 18 (the second layer internal gear ring is a non-fixed part), which drives the output shaft 11 to output. The output shaft 11 transmits to the second sun gear 14 of the output layer, and then the second sun gear 14 transmits to the second layer planetary gear body 16. The second layer planetary gear body 16 transmits to the internal gear ring body 18. The internal gear ring drives the transmission shaft 20, and the transmission shaft 20 drives the output part 21 to output.

[0032] When it is necessary to connect motor 2 to mounting plate 1, pull motor 2 to move it, placing motor 2 between clamping plates 123. Then pull clamping plate 123 to move it, causing clamping plate 123 to move slider 126. Sliding slider 126 slides on the inner wall of slide groove 121, causing spring 127 to stretch. Then, retaining ring 122 is put on clamping plate 123, and clamping plate 123 presses and fixes motor 2. Then, the rebound force of spring 127 causes clamping plate 123 to abut and fix retaining ring 122. Anti-slip pad 124 can increase the friction between clamping plate 123 and motor 2. The friction force prevents the clamping plate 123 from sliding when clamping and fixing the motor 2. The limiting rod 125 can limit the slider 126 to prevent the slider 126 from deviating during use, thus improving the sliding stability of the slider 126. The limiting rod 125 can also limit the spring 127 to prevent the spring 127 from deforming during use, thus improving the service life of the spring 127. The roughness of the outer surface of the clamping plate 123 and the inner surface of the retaining ring 122 can increase the friction between the retaining ring 122 and the clamping plate 123, thus preventing the clamping plate 123 from sliding when it is abutting and fixed with the retaining ring 122.

[0033] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0034] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A structure for a self-locking planetary gearbox, characterized in that, include: The mounting plate (1) and the connecting structure (12) are provided. A motor (2) is provided on one side of the mounting plate (1). The motor (2) is connected to the mounting plate (1) via the connecting structure (12). A connecting plate (4) is installed on the end of the motor (2) away from the mounting plate (1). A first sun gear (5) is installed on the output end of the motor (2). A gearbox housing (3) is installed on the side of the connecting plate (4) away from the motor (2). A first internal gear ring (6) is installed inside the gearbox housing (3). An output internal gear ring (8) is installed inside the gearbox housing (3). A planet carrier (7) is provided on the inner wall of the output internal gear ring (8). A plurality of planet gears (13) are installed inside the planet carrier (7). The sides of the plurality of planet gears (13) that are close to each other are all meshed with the first sun gear (5). The sides of the planet gears (13) that are away from the first sun gear (5) are respectively meshed with the output internal gear ring (8) and the first internal gear ring (6). The gearbox housing (3) has an injection-molded insert (9) installed inside, which meshes with the output internal gear ring (8). An oil-impregnated bearing (10) is installed inside the injection-molded insert (9), and an output shaft (11) is installed inside the oil-impregnated bearing (10). A gearbox body (19) is installed at the end of the gearbox housing (3) away from the motor (2). An output component (21) is installed inside the gearbox housing (3). A transmission shaft (20) is installed on the inner wall of the output component (21). An internal gear ring body (18) is installed inside the gearbox body (19). A planetary gear cover (17) is installed inside the internal gear ring body (18). Several planetary gear shafts (15) are installed inside the planetary gear cover (17). A planetary gear body (16) is installed on the arc surface of the planetary gear shaft (15). A second sun gear (14) is installed on the arc surface of the output shaft (11). The second sun gear (14) meshes with the planetary gear body (16).

2. The structure of a self-locking planetary gearbox according to claim 1, characterized in that, The inner wall of the mounting plate (1) is provided with a connecting structure (12). The connecting structure (12) includes four sliding grooves (121). The four sliding grooves (121) are opened on the mounting plate (1). A slider (126) is slidably connected to the inner wall of the sliding groove (121). A clamp (123) is fixedly connected to the side of the slider (126) away from the mounting plate (1). A retaining ring (122) abuts against the side of the four clamps (123) away from each other. A spring (127) is provided inside the sliding groove (121). The two ends of the spring (127) are fixedly connected to the slider (126) and the sliding groove (121) respectively.

3. The structure of a self-locking planetary gearbox according to claim 2, characterized in that, Each of the four clamps (123) has an anti-slip pad (124) fixedly connected to one side of each other. The anti-slip pad (124) is a rubber pad.

4. The structure of a self-locking planetary gearbox according to claim 2, characterized in that, The sliding groove (121) is internally fixedly connected to a limiting rod (125), and the limiting rod (125) is slidably connected to the slider (126).

5. The structure of a self-locking planetary gearbox according to claim 4, characterized in that, The limiting rod (125) has a circular cross-section, and the spring (127) is sleeved on the arc surface of the limiting rod (125).

6. The structure of a self-locking planetary gearbox according to claim 2, characterized in that, The outer surface of the clamp (123) and the inner surface of the retaining ring (122) are relatively rough, and the cross-section of the clamp (123) is arc-shaped.

Images