Power transmission structure of swimming pool cleaning robot

Abstract

The embodiment of the utility model provides a power transmission structure of a swimming pool cleaning robot. The power transmission structure comprises an output shaft, an output gear, a transmission gear, a cleaning brush gear, a conveying belt and a driven wheel. Wherein an output gear is mounted on the output shaft, and the transmission gear is mounted on a fixed shaft parallel to the output shaft; the transmission gear comprises an inner gear and an outer gear which are coaxial, the inner gear is meshed with the output gear to transmit power, the outer gear comprises inner teeth and outer teeth, the inner teeth are used for being meshed with the cleaning brush gear, the outer teeth are used for being meshed with the conveying belt, and the conveying belt is meshed with the driven wheel; a groove is formed in the outer side of an outer tooth of the transmission gear, a protrusion matched with the groove is arranged on the inner side of the conveying belt, and the depth of the groove is larger than the height of the protrusion. Through the scheme of the embodiment of the invention, the transmission belt can be prevented from derailing while the power is effectively transmitted.

Description

Technical Field

[0001] The present application relates to the technical field of swimming pool cleaning robots, and in particular to a power transmission structure of a swimming pool cleaning robot. Background Art

[0002] The power transmission structure of a pool cleaning robot is a specialized power transmission system designed for pool cleaning robots. It uses a transmission mechanism to convert the motor's rotation into sweeping and propulsion motions, thereby achieving automated pool cleaning. However, in practical applications, this system faces the challenge of effectively transmitting power while preventing the conveyor belt from derailing. Derailment not only affects the robot's efficiency but also causes mechanical failures and increases maintenance costs. Summary of the Invention

[0003] In view of this, an embodiment of the present disclosure provides a power transmission structure for a swimming pool cleaning robot, which at least partially solves the problems existing in the prior art.

[0004] The present application discloses a power transmission structure for a swimming pool cleaning robot, comprising an output shaft, an output gear, a transmission gear, a cleaning brush gear, a transmission belt, and a driven wheel;

[0005] An output gear is mounted on the output shaft, and the transmission gear is mounted on a fixed shaft parallel to the output shaft;

[0006] The transmission gear includes a coaxial internal gear and an external gear, the internal gear meshes with the output gear to transmit power, the external gear includes internal teeth and external teeth, the internal teeth are used to mesh with the cleaning brush gear, and the external teeth are used to mesh with the transmission belt, and the transmission belt is meshed with the driven wheel; and

[0007] A groove is provided on the outer side of the outer teeth of the transmission gear, a protrusion matching the groove is provided on the inner side of the transmission belt, and the depth of the groove is greater than the height of the protrusion.

[0008] In a specific embodiment, the output shaft is connected to the motor, and includes two output shafts, which are respectively arranged on both sides of the front end of the pool cleaning robot.

[0009] In a specific embodiment, a cover plate is fastened to the outer side of the transmission gear, and the cover plate at least partially covers the transmission belt.

[0010] In a specific embodiment, a baffle is provided on the other side of the groove away from the external teeth.

[0011] In a specific embodiment, the transmission ratio of the inner teeth to the cleaning brush gear is set so that the ratio of the outer linear speed of the roller brush to the linear speed of the conveyor belt is greater than 2.

[0012] In a specific embodiment, there are two roller brushes, which are respectively arranged on the left and right sides of the front end of the pool cleaning robot, and the connecting parts of the two roller brushes are fixed to the main body through a connecting bracket.

[0013] In a specific embodiment, a protrusion is provided on the side of the conveyor belt opposite to the side where the protrusion is provided to form a crawler-type walking mechanism.

[0014] In a specific embodiment, the conveyor belt is retractable.

[0015] The present disclosure provides a power transmission structure for a pool cleaning robot, comprising an output shaft, an output gear, a transmission gear, a cleaning brush gear, a transmission belt, and a driven wheel. The output shaft is mounted with an output gear, and the transmission gear is mounted on a fixed shaft parallel to the output shaft. The transmission gear comprises a coaxial internal gear and an external gear, the internal gear meshing with the output gear to transmit power, the external gear comprising internal and external teeth, the internal teeth being configured to mesh with the cleaning brush gear, while the external teeth are configured to mesh with the transmission belt, which meshes with the driven wheel. Furthermore, the external teeth of the transmission gear are provided with grooves on the outside, and the transmission belt is provided with protrusions on the inside that match the grooves, wherein the depth of the grooves is greater than the height of the protrusions. The solution of the present disclosure can effectively transmit power while preventing the transmission belt from derailing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the exemplary implementation methods of the embodiments of the present disclosure, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of the overall structure of the swimming pool cleaning robot in this application;

[0018] Figure 2 This is a schematic diagram of the power transmission structure of the swimming pool cleaning robot of the present application;

[0019] Figure 3 This is a schematic diagram of the structure of the transmission gear and transmission belt of this application;

[0020] Figure 4 This is a schematic diagram of the structure of the motor-driven transmission gear of this application;

[0021] Figure 5 This is a schematic structural diagram of the cover plate of this application;

[0022] Figure 6This is a schematic structural diagram of the roller brush of this application.

[0023] In the figure: 100, swimming pool cleaning robot; 110, housing; 120, flow channel structure; 130, filtering structure; 140, drainage device; 150, driving mechanism; 160, walking mechanism; 170, cleaning brush; 1, output shaft; 2, output gear; 3, transmission gear; 4, cleaning brush gear; 5, transmission belt; 6, driven pulley; 31, internal gear; 32, external gear; 321, internal teeth; 322, external teeth; 33, groove; 51, protrusion; 7, motor; 8, cover plate; 34, baffle; 9, roller brush; 10, connecting bracket; 52, protrusion DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure more clear, the embodiments of the present disclosure are further described in detail below in combination with the embodiments and drawings. The schematic implementation methods of the embodiments of the present disclosure and their descriptions are only used to explain the embodiments of the present disclosure and are not intended to limit the embodiments of the present disclosure.

[0025] First, refer to Figure 1 , describes the overall structure of the swimming pool cleaning robot 100 of the present application. Figure 1 As shown, the swimming pool cleaning robot of the present application includes a housing 110 , a flow channel structure 120 , a filtering structure 130 , a drainage device 140 , a driving mechanism 150 , a walking mechanism 160 and a cleaning brush 170 .

[0026] The housing 110 is the main structure of the pool cleaning robot, and is internally provided with a flow channel structure 120. The flow channel structure 120 is a water flow channel, and a filter structure 130 is provided in the flow channel structure 120 to filter the water flowing through the flow channel structure 120. The drainage device 140 is also provided in the flow channel structure 120 and provides power to discharge the filtered water out of the flow channel structure 120, thereby filtering the water in the pool. The pool cleaning robot of the present application is provided with a cleaning brush 170 that can rotate to clean the pool bottom or pool walls, and the drive mechanism 150 is responsible for driving the walking mechanism 160 and the cleaning brush 170 to clean the pool during the walking process.

[0027] In the present application, the shell 110 can be made of plastic and has a cavity inside to accommodate a filtering structure 130 such as a filter screen. Impurities cleaned by the cleaning brush 170 enter the flow channel structure 120 through, for example, a water inlet at the bottom of the pool cleaning robot, and are then filtered through the filter screen. The filtered water is then discharged from the top of the pool cleaning robot 100 using a drainage device 140 such as a spiral mechanism, while impurities and the like are retained in the filter screen to achieve the cleaning operation of the pool.

[0028] Next, refer to Figure 2 , describing a power transmission structure of a swimming pool cleaning robot of the present application, the power transmission structure includes an output shaft 1, an output gear 2, a transmission gear 3, a cleaning brush gear 4, a transmission belt 5 and a driven wheel 6.

[0029] Output shaft 1 is mounted with output gear 2, and transmission gear 3 is mounted on a fixed shaft parallel to output shaft 1. Transmission gear 3 consists of a coaxial internal gear 31 and external gear 32. Internal gear 31 meshes with output gear 2 to transmit power, while external gear 32 includes internal teeth 321 and external teeth 322. Internal teeth 321 mesh with cleaning brush gear 4, while external teeth 322 mesh with transmission belt 5, which in turn meshes with driven pulley 6.

[0030] In addition, if Figure 3 As shown, a groove 33 is provided on the outer side of the transmission gear 3 , and a protrusion 51 matching the groove 33 is provided on the inner side of the transmission belt 5 . The depth of the groove 33 is greater than the height of the protrusion 51 .

[0031] In actual technical implementation, the output shaft 1 and the fixed shaft of the power transmission structure are made of stainless steel or plastic to ensure corrosion resistance and mechanical strength. The output gear 2 and the transmission gear 3 adopt high-precision gear processing technology to ensure smooth engagement and efficient transmission. The cleaning brush gear 4 is also made of high-strength wear-resistant material, and is tightly engaged with the inner teeth 321 through precise processing technology to prevent loosening. The transmission belt 5 is made of high-strength flexible material with good corrosion resistance and aging resistance. The protrusion 51 on the inner surface of the transmission belt 5 and the groove 33 of the transmission gear 3 are formed by precision molds to ensure stable fit between the two. The driven wheel 6 is made of a high-hardness material to prevent deformation, thereby ensuring the normal operation of the transmission belt 5.

[0032] The power transmission structure of the present application effectively solves the problem of easy derailment of the transmission belt 5 in the traditional transmission system by providing a groove 33 on the outside of the transmission gear 3 and a matching protrusion 51 on the inside of the transmission belt 5. Specifically, when the transmission gear 3 rotates, the groove 33 on its outside and the protrusion 51 on the inside of the transmission belt 5 form a tight fit, preventing the transmission belt 5 from being offset or falling off due to external forces. At the same time, the depth of the groove 33 is greater than the height of the protrusion 51, ensuring that even if slight vibrations or impacts occur during operation, or even when particulate impurities enter between the transmission belt 5 and the transmission gear 3 during the robot cleaning the swimming pool, the protrusion 51 can always operate stably in the groove 33, ensuring the continuity and reliability of power transmission. This design not only improves the stability and durability of the transmission system, but also significantly improves the overall working efficiency of the pool cleaning robot.

[0033] In one embodiment, Figure 4As shown, the power transmission structure of a pool cleaning robot according to the present application comprises an output shaft 1 connected to a motor 7. Two output shafts 1 are provided, one on each side of the front end of the pool cleaning robot. Specifically, the two output shafts 1 are symmetrically arranged at the front end of the pool cleaning robot and independently connected to the motor 7. This arrangement ensures balanced power transmission between the left and right sides of the robot during operation, thereby improving motion stability and efficiency.

[0034] The connection between the output shaft 1 and the motor 7 can be direct or via a speed reducer. For example, in one embodiment, each output shaft 1 is directly connected to the output end of the motor 7 via a coupling, ensuring efficient and smooth power transmission. The design of the coupling must consider its torque transmission capacity and tolerance for axial and radial errors to ensure reliable performance over long periods of operation.

[0035] Specifically, to ensure easy installation and a secure connection, the motor 7 is fixed to the robot's internal support structure, while the output shaft 1 is secured to both sides of the robot's front end via bearing blocks. This design makes the entire power transmission system compact and easy to install and maintain. Seals can also be installed at both ends of the output shaft 1 to prevent water and other debris from entering, extending the device's service life.

[0036] In one embodiment, Figure 5 As shown, a cover plate 8 is provided on the outside of the transmission gear 3 of the power transmission structure of a pool cleaning robot according to the present application. This cover plate 8 can cover the entire conveyor belt 5, but it is understood that this cover plate 8 can also partially cover the conveyor belt 5, that is, the cover plate 8 at least partially covers the conveyor belt 5 to ensure the safety and stability of the transmission gear 3 and conveyor belt 5 during operation. Specifically, the cover plate 8 is installed on the outside of the transmission gear 3 and completely encloses the conveyor belt 5, effectively preventing external impurities from entering the transmission system and avoiding mechanical failures caused by interference from foreign objects.

[0037] In actual technical implementation, the cover plate 8 can be fixed to the robot's housing by bolts, or it can adopt a snap-on design to facilitate quick disassembly and maintenance. The gap between the cover plate 8 and the transmission gear 3 must be reasonably designed to ensure that it does not interfere with the normal operation of the gear. In addition, the material of the cover plate 8 should be selected to have high strength and wear resistance, such as metal or engineering plastic, to ensure reliability and durability under long-term use. For example, the cover plate 8 can be designed as a detachable structure and fixed to the housing with four bolts evenly distributed on the edges to facilitate regular cleaning and inspection of the transmission components.

[0038] In one embodiment, a groove 33 of a power transmission structure of a swimming pool cleaning robot of the present application is provided with a baffle 34 on one side close to the outer teeth 322 (see FIG. Figure 3Grooves 33 are designed to accommodate and position protrusions 51 of the transmission belt 5 to prevent derailment during transmission. Baffles 34 function to restrain and secure the transmission belt 5, preventing it from shifting or falling off during movement, thereby ensuring the stability of the power transmission. Specifically, baffles 34 are located on the side of grooves 33 away from the external teeth 322. Together with the external teeth 322, baffles 34 restrict the position of protrusions 51, thus providing a stable installation environment for the power transmission mechanism.

[0039] For example, baffle 34 can be integrally formed with groove 33 to form a single, integrated structure. This structure secures power transmission components, such as gears and bearings, within this enclosed space, preventing them from shifting or becoming loose due to external forces. Furthermore, baffle 34 can be designed to be removable, facilitating maintenance and replacement of key transmission components. Specifically, the size and shape of baffle 34 should match groove 33 to ensure stability and sealing after installation.

[0040] In one embodiment, the transmission ratio between the inner teeth 321 of the power transmission structure of a swimming pool cleaning robot of the present application and the cleaning brush gear 4 is set so that the ratio of the outer linear speed of the roller brush 9 as an example of the cleaning brush 170 to the linear speed of the conveyor belt is greater than 2. This design ensures that the movement speed of the roller brush 9 is higher than the speed of the conveyor belt through a specific transmission ratio, thereby improving the cleaning efficiency. Specifically, the transmission ratio between the inner teeth 321 and the cleaning brush gear 4 is achieved by optimizing the number of teeth and diameter of the gears. The inner teeth 321 are mounted on the internal frame of the robot and mesh with the cleaning brush gear 4 to form a stable transmission chain. The roller brush 9 is mounted on the bottom of the robot and is directly driven by the cleaning brush gear 4.

[0041] In one embodiment, to achieve the aforementioned transmission ratio, the internal teeth 321 and the cleaning brush gear 4 can have different numbers of teeth. For example, the internal teeth 321 can have 36 teeth, while the cleaning brush gear 4 can have 18 teeth. This way, when the motor 7 drives the internal teeth 321, the cleaning brush gear 4 rotates at twice the speed, causing the outer edge of the roller brush 9 to have a speed at least twice that of the conveyor belt. This specific transmission ratio ensures that the roller brush 9 can efficiently remove dirt from the pool bottom, while the conveyor belt effectively transfers the collected dirt to the trash can.

[0042] In one embodiment, Figure 6As shown, the power transmission structure of a pool cleaning robot according to the present application includes two roller brushes 9, one located on the left and right sides of the front end of the pool cleaning robot. The joint of the two roller brushes 9 is secured to the robot body via a connecting bracket 10. The presence of roller brushes 9 not only enhances cleaning effectiveness but also improves the stability and reliability of the entire system. The number and placement of roller brushes 9 ensures a wider coverage area when cleaning the pool walls while reducing blind spots.

[0043] Specifically, each roller brush 9 is mounted on the left or right side of the front end of the main body. One end of the connecting bracket 10 is fixed to the main structure, and the other end is connected to the joint of the two roller brushes 9, ensuring the stability and synchronization of the roller brushes 9 during operation. The material of the connecting bracket 10 is generally selected from a high-strength lightweight alloy to achieve a balance between strength and weight reduction.

[0044] For example, in one specific technical implementation, two symmetrically mounted motors can be used to drive the left and right roller brushes 9, respectively. Roller brushes 9 are composed of multiple soft bristles to enhance cleaning effectiveness. The motor's output shaft 1 is connected to roller brushes 9 via a speed reducer and coupling, ensuring smooth power transmission. Furthermore, the connecting bracket 10 can be designed with an adjustable structure to allow for flexible adjustment to different pool types.

[0045] In one embodiment, a conveyor belt of a power transmission structure of a swimming pool cleaning robot of the present application is provided with a protrusion 52 on the side opposite to the side provided with the protrusion 51 (see Figure 3 ) to form a crawler-type walking mechanism. The protrusions 52 effectively enhance the friction between the conveyor belt and the ground or pool bottom, thereby improving the robot's walking stability. Furthermore, the protrusions 52 provide better grip in complex swimming pool environments, ensuring reliable operation of the robot in diverse terrain conditions.

[0046] In terms of its specific structure, the entire conveyor belt is made of a flexible material, capable of withstanding certain bending and deformation to adapt to uneven surfaces. Multiple protrusions 51 are evenly distributed on the inner side of the conveyor belt, which are used to achieve linkage with the internal power system to drive the robot's movement. On the side opposite the protrusions 51, multiple protrusions 52 are provided. These protrusions 52 are arranged along the longitudinal direction of the conveyor belt, and each protrusion 52 has a specific height and shape designed to generate greater friction when in contact with the ground or swimming pool bottom. This design not only enhances the grip of the walking mechanism but also maintains high operating efficiency under different operating environments.

[0047] For example, in practical applications, the conveyor belt can be fixed between the driving wheel and the driven wheel 6 on the power system to ensure smooth transmission. The specific shape and arrangement of the protrusions 52 can be optimized according to actual needs. For example, triangular or cylindrical protrusions 52 can be used, and the density and distribution of the protrusions 52 can be adjusted according to the specific application scenario to achieve the best running effect.

[0048] In one embodiment, the conveyor belt of the power transmission structure of a pool cleaning robot disclosed herein is stretchable. As a key component of the power transmission structure, the conveyor belt is responsible for transmitting power from the power unit to the various actuators. To ensure reliability and adaptability of the power transmission, the conveyor belt is constructed of stretchable materials or designs, enabling it to maintain stable power transmission performance in diverse operating environments.

[0049] Specifically, stretchable conveyor belts can be made of elastic materials. These materials can be highly elastic polymers or composite materials that deform when subjected to force and quickly return to their original shape after unloading. This structure can effectively absorb and compensate for dimensional changes caused by changes in the working environment or wear of mechanical components, ensuring stable and reliable power transmission.

[0050] During actual operation, when this device is used, the driving mechanism first provides driving force to the output shaft 1. The output shaft 1 rotates and drives the output gear 2 on it to rotate synchronously. The output gear 2 transmits power to the transmission gear 3 through a meshing relationship. The transmission gear 3 consists of two parts, an inner and an outer part, and the inner gear 31 and the outer gear 32 rotate coaxially. The inner gear 31 meshes with the output gear 2 to ensure efficient power transmission. At the same time, the inner teeth 321 of the outer gear 32 mesh with the cleaning brush gear 4, further transmitting the power to the cleaning brush. The cleaning brush starts to rotate and cleans the wall of the swimming pool. In addition, the outer gear 32 of the transmission gear 3 has a special outer tooth 322 design, which meshes with the transmission belt 5. The transmission belt 5 bypasses the outer gear 32 and connects to the driven wheel 6 on it. The driven wheel 6 is usually installed at the power input end of the walking mechanism, thereby further transmitting the power to the walking mechanism. During the meshing process between the transmission belt 5 and the external gear 32, the grooves 33 on the external gear 32 and the corresponding protrusions 51 on the transmission belt 5 engage with the grooves 33, ensuring stable and reliable power transmission. The depth of the grooves 33 is designed to be greater than the height of the protrusions 51, preventing the protrusions 51 from falling out of the grooves 33 and avoiding slipping or tooth jumping. Through these precise mechanical connections, the entire power transmission structure ensures that the cleaning brush and the travel mechanism receive the required power simultaneously, allowing the pool cleaning robot to efficiently complete its cleaning tasks.

[0051] While the exemplary systems and methods of the present invention have been specifically shown and described with reference to the foregoing embodiments, these are merely examples of the best modes for implementing the present systems and methods. Those skilled in the art will appreciate that various changes may be made to the embodiments of the systems and methods described herein when implementing the present systems and / or methods without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A power transmission structure of a swimming pool cleaning robot, characterized in that: The power transmission structure comprises an output shaft (1), an output gear (2), a transmission gear (3), a cleaning brush gear (4), a transmission belt (5) and a driven wheel (6); wherein An output gear (2) is mounted on the output shaft (1), and the transmission gear (3) is mounted on a fixed shaft parallel to the output shaft (1); The transmission gear (3) includes a coaxial internal gear (31) and an external gear (32), the internal gear (31) meshes with the output gear (2) to transmit power, the external gear (32) includes internal teeth (321) and external teeth (322), the internal teeth (321) are used to mesh with the cleaning brush gear (4), and the external teeth (322) are used to mesh with the transmission belt (5), and the transmission belt (5) is meshed with the driven wheel (6); and A groove (33) is provided on the outside of the outer teeth (322) of the transmission gear (3), and a protrusion (51) matching the groove (33) is provided on the inside of the transmission belt (5), and the depth of the groove (33) is greater than the height of the protrusion (51).

2. The power transmission structure according to claim 1, characterized in that: The output shaft (1) is connected to the motor (7), and comprises two output shafts, which are respectively arranged on both sides of the front end of the swimming pool cleaning robot.

3. The power transmission structure according to claim 1, characterized in that: A cover plate (8) is fastened to the outside of the transmission gear (3), and the cover plate (8) at least partially covers the transmission belt (5).

4. The power transmission structure according to claim 1, characterized in that: A baffle (34) is provided on the other side of the groove (33) away from the outer teeth (322).

5. The power transmission structure according to claim 1, characterized in that: The transmission ratio of the inner teeth (321) to the cleaning brush gear (4) is set so that the ratio of the outer linear speed of the roller brush (9) to the linear speed of the transmission belt (5) is greater than 2.

6. The power transmission structure according to claim 5, characterized in that: There are two roller brushes (9), which are respectively arranged on the left and right sides of the front end of the swimming pool cleaning robot, and the combined parts of the two roller brushes (9) are fixed to the main body via a connecting bracket (10).

7. The power transmission structure according to claim 1, characterized in that: A protrusion (52) is provided on the side of the conveyor belt (5) opposite to the side where the protrusion (51) is provided, so as to form a crawler-type walking mechanism.

8. The power transmission structure according to claim 7, characterized in that: The conveyor belt (5) is stretchable.

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