Belt wheel type driving mechanism and swimming pool cleaning robot

Abstract

The utility model provides a belt wheel type driving mechanism and a swimming pool cleaning robot, the belt wheel type driving mechanism comprises a main shell, a first belt wheel assembly and a second belt wheel assembly, the first belt wheel assembly is provided with a first synchronous belt wheel, the second belt wheel assembly comprises a third synchronous belt wheel, a fourth synchronous belt wheel and a second synchronous belt, the third synchronous belt wheel is coaxially fixed to the first end face of the first synchronous belt wheel, the fourth synchronous belt wheel is used for driving a rolling brush assembly arranged close to the first end face to rotate, the first synchronous belt wheel is provided with a mounting process hole for a mounting jig to stretch in, and the mounting jig is used for mounting the second synchronous belt wheel, the third synchronous belt wheel and the fourth synchronous belt wheel. According to the belt wheel type driving mechanism and the swimming pool cleaning robot, the number of structural parts is small, installation steps are simple, the fourth synchronous belt wheel, the third synchronous belt wheel, the first synchronous belt wheel, the second synchronous belt wheel and the like do not need to be installed into a whole, and the installation procedure is simplified.

Description

Technical Field

[0001] The utility model belongs to the technical field of swimming pool cleaning, and more specifically relates to a wheeled driving mechanism and a swimming pool cleaning robot. Background Art

[0002] The pool cleaning robot can move on the bottom and side walls of the pool, and remove dirt in the pool by filtering, brushing, etc. It can replace manpower to clean the pool, and has a high cleaning efficiency. It can also reach every corner of the pool, including some areas that are difficult to clean manually.

[0003] Tracked pool cleaning robots can use a pulley transmission mechanism to drive the track and the roller brush to rotate, allowing the robot to reach the cleaning area and scrub the pool surface. However, the current transmission mechanism has many structural parts and the installation process is also relatively complicated. Utility Model Content

[0004] The purpose of the embodiments of the present utility model is to provide a pulley drive mechanism and a swimming pool cleaning robot to solve the technical problems in the prior art of having a large number of transmission mechanism components and a complicated installation process.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a pulley drive mechanism, including a main shell, a first pulley assembly and a second pulley assembly, the first pulley assembly is used to drive the robot to move, and the first pulley assembly has a first synchronous pulley, the first synchronous pulley has a first end face and a second end face axially opposite to each other, the second pulley assembly includes a third synchronous pulley, a fourth synchronous pulley and a second synchronous belt, the second synchronous belt is wound around the third synchronous pulley and the fourth synchronous pulley, the third synchronous pulley is coaxially fixed to the first end face of the first synchronous pulley, the fourth synchronous pulley is used to drive the roller brush assembly arranged near the first end face to rotate, the first synchronous pulley is provided with an installation process hole for an installation jig to extend into, and the installation jig is used to install the second synchronous belt to the fourth synchronous pulley.

[0006] Optionally, the third synchronous pulley and the first synchronous pulley are integrally formed.

[0007] Optionally, the diameter of the mounting fixture is the same as the diameter of the fourth synchronous pulley, and the outer diameter of the fourth synchronous pulley after meshing with the second synchronous belt is a first size, and the first size is larger than the diameter of the mounting process hole.

[0008] Optionally, the main shell has a first circumferential portion, the first synchronous pulley is provided with a first circumferential hole for the first circumferential portion to extend into, a first rotating bearing is provided between the first circumferential portion and the first circumferential hole, the first circumferential portion has a limiting step for axially positioning the first rotating bearing, and a limiting plate is fixed at one end of the first circumferential portion away from the limiting step, and the first rotating bearing is located between the limiting plate and the limiting step.

[0009] Optionally, the number of the first rotating bearings is two, and the inner wall of the first circumferential hole extends radially inward to form a first limiting portion and a second limiting portion, the first limiting portion connects the first synchronous pulley and the second limiting portion, and the axial dimension of the first limiting portion is greater than the axial dimension of the second limiting portion; the limiting step, one of the first rotating bearings, the first limiting portion, the other first rotating bearing and the limiting plate are arranged in sequence along the axial direction, and the axial ends of the first limiting portion respectively abut against the outer rings of the two first rotating bearings.

[0010] Optionally, the pulley drive mechanism also includes a roller brush assembly, the fourth synchronous pulley includes a pulley body and a transmission part that are connected to each other, the pulley body is engaged with the second synchronous belt, the roller brush assembly has a transmission hole for inserting the transmission part, and the roller brush assembly moves synchronously with the fourth synchronous pulley.

[0011] Optionally, the main shell is provided with a second circumferential hole, the fourth synchronous pulley is arranged through the second circumferential hole, and the pulley body and the transmission part are connected through a second circumferential part, and a second rotating bearing is provided between the second circumferential hole and the second circumferential part; the main shell radially extends near the second circumferential hole to form a first annular limiting part, and the connection between the second circumferential part and the pulley body radially protrudes outward to form a second annular limiting part, and the second rotating bearing is located between the first annular limiting part and the second annular limiting part.

[0012] Optionally, the roller brush assembly includes a roller brush body, a roller brush shaft and a roller brush sleeve, the roller brush sleeve is arranged to extend into the end of the roller brush body, the roller brush shaft is arranged to pass through the roller brush body, the roller brush sleeve and the fourth synchronous pulley, and a slot is provided at one end of the roller brush shaft away from the roller brush body, and a retaining spring is clamped at the slot for axially limiting the fourth synchronous pulley.

[0013] Optionally, the second end face of the first synchronous pulley has a first annular protrusion and a second annular protrusion, the second annular protrusion is located on the outer periphery of the first annular protrusion, and the second annular protrusion extends radially outward away from the second end face to form a skirt portion; the skirt portion is covered with a decorative cover, and the decorative cover extends axially towards the second end face to form a third annular protrusion, and the third annular protrusion extends between the first annular protrusion and the second annular protrusion; the first annular protrusion has a first clamping portion, and the decorative cover has a second clamping portion that is engaged with the first clamping portion on the side facing the second end face.

[0014] The utility model also provides a swimming pool cleaning robot, which includes the above-mentioned wheeled driving mechanism.

[0015] The pulley drive mechanism and pool cleaning robot provided by the present invention have the following advantages: Compared with the prior art, the pulley drive mechanism of the present invention includes a main housing, a first pulley assembly, and a second pulley assembly. The second pulley assembly is positioned on the first synchronous pulley of the first pulley assembly and is used to drive the roller brush assembly. In the second pulley assembly, a third synchronous pulley is coaxially fixedly connected to the first synchronous pulley. When installing the second synchronous belt, the second synchronous belt is first wound around the third synchronous pulley and a mounting jig extending through the mounting hole. The first, third, and mounting jigs are then mounted to the main housing. The mounting jig is then docked with the roller brush assembly. The mounting jig is then removed, and the second synchronous belt is transferred to the fourth synchronous pulley. Compared to a scheme in which the fourth synchronous pulley is mounted on the first synchronous pulley, this scheme has fewer structural parts, eliminating the need for a connecting member between the fourth and first synchronous pulleys. Furthermore, the installation process is simplified, as there is no need to first install the fourth, third, first, and second synchronous belts as a single unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A three-dimensional structural diagram of a pulley drive mechanism provided in an embodiment of the present utility model;

[0018] Figure 2 A partial exploded structural diagram of a pulley drive mechanism provided in an embodiment of the present utility model;

[0019] Figure 3 A three-dimensional structural diagram of a first mounting assembly provided in an embodiment of the present utility model;

[0020] Figure 4 A three-dimensional structural diagram of a second mounting assembly provided in an embodiment of the present utility model;

[0021] Figure 5 A cross-sectional view of a pulley drive mechanism provided in an embodiment of the present utility model;

[0022] Figure 6 for Figure 5 A partial enlarged view of point A in the middle;

[0023] Figure 7 for Figure 5 A partial enlarged view of point B in the middle;

[0024] Figure 8 The three-dimensional structure of the first synchronous pulley provided in the embodiment of the utility model Figure 1 ;

[0025] Figure 9 The three-dimensional structure of the first synchronous pulley provided in the embodiment of the utility model Figure 2 ;

[0026] Figure 10 A three-dimensional structural diagram of a fourth synchronous pulley provided in an embodiment of the present utility model;

[0027] Figure 11 A three-dimensional structural diagram of a decorative cover provided in an embodiment of the present utility model;

[0028] Figure 12 This is a three-dimensional structural diagram of one end of the roller brush assembly provided in an embodiment of the present utility model.

[0029] Among them, the reference numerals in the figures are:

[0030] 10-main housing; 11-first circumferential portion; 12-second connecting hole; 13-circumferential positioning protrusion; 14-limiting step; 15-second circumferential hole; 16-first annular limiting portion; 20-first pulley assembly; 21-driving gear; 22-first synchronous pulley; 2201-first end face; 2202-second end face; 221-first circumferential hole; 222-first limiting portion; 223-second limiting portion; 224-first annular protrusion; 225-second annular protrusion; 226-installation process hole; 227-first clamping portion; 228-skirt portion; 23-first synchronous belt; 30-second pulley assembly; 31-third synchronous pulley; 32-fourth synchronous pulley; 321-pulley body; 322-transmission part; 323-second circumferential part; 324-second annular limiting part; 33-second synchronous belt; 40-mounting fixture; 50-roller brush assembly; 51-roller brush body; 511-bristles; 512-first annular step; 52-roller brush sleeve; 521-transmission hole; 522-second annular step; 53-roller brush shaft; 60-decorative cover; 61-third annular protrusion; 62-second clamping part; 71-first rotating bearing; 72-second rotating bearing; 73-limiting plate; 74-locking screw; 75-circlip. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and 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.

[0032] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0035] The pool cleaning robot can move on the bottom and side walls of the pool, and remove dirt in the pool by filtering, brushing, etc. It can replace manpower to clean the pool, and has a high cleaning efficiency. It can also reach every corner of the pool, including some areas that are difficult to clean manually.

[0036] Tracked pool cleaning robots use a pulley drive mechanism to drive the tracks and the roller brush, allowing the robot to reach the cleaning area and scrub the pool's walls. The first pulley assembly drives the robot's movement, while the second pulley assembly drives the roller brush. The two pulleys of the second pulley assembly are fixed to one of the pulleys of the first pulley assembly. A drive belt is then placed over the two pulleys. One of the pulleys of the first pulley assembly and the second pulley assembly form a mounting assembly, which is then installed on the robot's housing, with the output pulley of the second pulley assembly docked with the roller brush assembly. During installation, both pulleys of the second pulley assembly must be connected to the first pulley assembly via connectors, resulting in numerous connectors and installation steps. Furthermore, when docking the roller brush with the output pulley of the second pulley assembly, the installer cannot see the internal structure, making docking difficult.

[0037] In order to solve the above technical problems, the utility model proposes a pulley drive mechanism and a swimming pool cleaning robot. The pulley drive mechanism includes a main shell 10, a first pulley assembly 20 and a second pulley assembly 30. The first pulley assembly 20 has a first synchronous pulley 22, and the second pulley assembly 30 includes a third synchronous pulley 31, a fourth synchronous pulley 32 and a second synchronous belt 33. The third synchronous pulley 31 is fixed to the first synchronous pulley 22 and rotates synchronously with the first synchronous pulley 22. The fourth synchronous pulley 32 is fixed to the roller brush assembly 50. The mounting fixture 40 is inserted into the mounting process hole 226, and the second synchronous belt 33 is wrapped around the third synchronous pulley 31 and the mounting fixture 40 to form a first mounting assembly. The first mounting assembly is then installed on the main shell 10, and the mounting fixture 40 is pulled out, and the second synchronous belt 33 is transferred to the fourth synchronous pulley 32. In this way, compared with the related art, at least the connecting parts between the fourth synchronous pulley 32 and the first synchronous pulley 22 can be reduced, the installation steps are relatively simple, and the installation fixture 40 and the roller brush assembly 50 can be quickly aligned, reducing the difficulty of installation.

[0038] The pulley drive mechanism provided in the embodiment of the present utility model is now described.

[0039] See also Figures 1 to 4 The pulley drive mechanism includes a main housing 10, a first pulley assembly 20 and a second pulley assembly 30. The first pulley assembly 20 is used to drive the robot to move, and the first pulley assembly 20 has a first synchronous pulley 22. The first synchronous pulley 22 has a first end face 2201 and a second end face 2202 axially opposite to each other. The second pulley assembly 30 includes a third synchronous pulley 31, a fourth synchronous pulley 32 and a second synchronous belt 33. The second synchronous belt 33 is wound around the third synchronous pulley 31 and the fourth synchronous pulley 32. The third synchronous pulley 31 is coaxially fixed to the first end face 2201 of the first synchronous pulley 22. The fourth synchronous pulley 32 is used to drive the roller brush assembly 50 arranged near the first end face 2201 to rotate. The first synchronous pulley 22 is provided with an installation process hole 226 for the installation fixture 40 to extend into. The installation fixture 40 is used to install the second synchronous belt 33 to the fourth synchronous pulley 32.

[0040] The main housing 10 is the main structure of the pulley drive mechanism. When the pulley drive mechanism is applied to a swimming pool cleaning robot, the main housing 10 may be the base of the swimming pool cleaning robot.

[0041] The first pulley assembly 20 is used to drive the robot to the location that requires cleaning. The first pulley assembly 20 includes a first synchronous pulley 22, a second synchronous pulley, and a first synchronous belt 23. The first synchronous belt 23 is wound around the first and second synchronous pulleys. The first synchronous belt 23 can be a track that enables the robot to move. The first synchronous pulley 22 has a first end face 2201 and a second end face 2202. The first end face 2201 faces the main housing 10, while the second end face 2202 faces away from the main housing 10.

[0042] The second pulley assembly 30 is used to rotate the roller brush assembly 50, which is used to scrub the pool surface. This allows the pool cleaning robot to scrub the pool surface while moving, thereby improving scrubbing efficiency. The second pulley assembly 30 includes a third synchronous pulley 31, a fourth synchronous pulley 32, and a second synchronous belt 33. The second synchronous belt 33 is wound around the third and fourth synchronous pulleys 31, 32. The third synchronous pulley 31 is coaxially fixedly connected to the first synchronous pulley 22. That is, the third synchronous pulley 31 and the first synchronous pulley 22 rotate synchronously. This allows the first and second pulley assemblies 20 and 30 to be driven by the same drive element, reducing the number of drive elements. The third synchronous pulley 31 is fixed to the first end surface 2201 of the first synchronous pulley 22. The roller brush assembly 50 and the fourth synchronous pulley 32 are also positioned near the first end surface 2201 of the first synchronous pulley 22.

[0043] When the first pulley assembly 20 is working, the first synchronous pulley 22 rotates, driving the third synchronous pulley 31 to rotate. The third synchronous pulley 31 drives the fourth synchronous pulley 32 to rotate through the second synchronous belt 33, thereby rotating the roller brush assembly 50.

[0044] The mounting jig 40 is used to install the second synchronous belt 33. Specifically, when installing the pulley drive mechanism, the third synchronous pulley 31 and the first synchronous pulley 22 are fixedly connected, and the fourth synchronous pulley 32 is installed on the roller brush assembly 50. Then, the mounting jig 40 is passed from the second end face 2202 through the installation process hole 226 of the first synchronous pulley 22 to the first end face 2201. The second synchronous belt 33 is wound around the third synchronous pulley 31 and the mounting jig 40, thus forming a first mounting assembly. The roller brush assembly 50 and the main housing 10 with the fourth synchronous pulley 32 installed form the second mounting assembly. Finally, the first end face 2201 of the first mounting assembly is installed facing the second mounting assembly. The mounting jig 40 is directly opposite the fourth synchronous pulley 32, and the main housing 10 and the first synchronous pulley 22 are fixedly connected. The mounting jig 40 is then withdrawn, and the second synchronous belt 33 on the mounting jig 40 is transferred to the fourth synchronous pulley 32.

[0045] The pulley drive mechanism in the above embodiment includes a main housing 10, a first pulley assembly 20, and a second pulley assembly 30. The second pulley assembly 30 is located on the first synchronous pulley 22 of the first pulley assembly 20, and the second pulley assembly 30 is used to drive the roller brush assembly 50 to rotate. In the second pulley assembly 30, the third synchronous pulley 31 is coaxially fixedly connected to the first synchronous pulley 22. When installing the second synchronous belt 33, the second synchronous belt 33 is first wound around the third synchronous pulley 31 and the mounting fixture 40 passing through the mounting process hole 226. Then, the first synchronous pulley 22, the third synchronous pulley 31, and the mounting fixture 40 are installed together to the main housing 10. The mounting fixture 40 is docked with the fourth synchronous pulley 32, and then the mounting fixture 40 is removed, and the second synchronous belt 33 is transferred to the fourth synchronous pulley 32. Compared with the solution in which the fourth synchronous pulley 32 is installed on the first synchronous pulley 22, this solution has fewer structural parts, the connecting structural parts between the fourth synchronous pulley 32 and the first synchronous pulley 22 can be omitted, and the installation steps are also simpler. There is no need to first install the fourth synchronous pulley 32, the third synchronous pulley 31, the first synchronous pulley 22, the second synchronous belt 33, etc. as a whole, which simplifies the installation process.

[0046] In some embodiments of the present invention, please refer to Figure 1 and Figure 2The pulley drive mechanism also includes a driving member and a driving gear 21. The motion output end of the driving member is fixedly connected to the driving gear 21. The driving gear 21 is engaged with the first synchronous pulley 22 to rotate the first synchronous pulley 22. The rotation of the first synchronous pulley 22 drives the second pulley assembly 30 to move, and at the same time moves the first synchronous belt 23, thereby rotating the second synchronous pulley.

[0047] In some embodiments of the present invention, the mounting jig 40 is a rod-shaped structure. The portion of the mounting jig 40 that interfaces with the fourth synchronous pulley 32 is a plug end of the mounting jig 40. The outer diameter and tooth profile of the plug end of the mounting jig 40 are the same as those of the fourth synchronous pulley 32. When the mounting jig 40 interfaces with the fourth synchronous pulley 32, the second synchronous belt 33 can be smoothly transferred from the outer periphery of the mounting jig 40 to the fourth synchronous pulley 32.

[0048] Optionally, the plug-in end of the mounting jig 40 and one axial end of the fourth synchronous pulley 32 have a concave-convex matching structure, which makes it easier to position the mounting jig 40 and the fourth synchronous pulley 32 circumferentially, thereby allowing the tooth shapes of the mounting jig 40 and the fourth synchronous pulley 32 to be completely aligned.

[0049] In some embodiments of the present invention, please refer to Figure 5 、 Figure 6 and Figure 8 The third synchronous pulley 31 is integrally formed with the first synchronous pulley 22. During the manufacturing process, the third synchronous pulley 31 and the first synchronous pulley 22 are formed at the same time, and there is no need to design a positioning and connection structure between the two.

[0050] The third synchronous pulley 31 does not need to be installed to the first synchronous pulley 22 through a locking member, a fixing member, etc., which can reduce the number of parts of the pulley drive mechanism and also eliminate the installation steps of the third synchronous pulley 31 and the first synchronous pulley 22, making the installation steps of the pulley drive mechanism simpler.

[0051] In some embodiments, the first synchronous pulley 22 and the third synchronous pulley 31 are coaxially arranged, and the third synchronous pulley 31 is located on the first end surface 2201 of the first synchronous pulley 22. A first circumferential hole 221 is formed at the center of the first synchronous pulley 22 and the third synchronous pulley 31, through which the main housing 10 passes, so that the first synchronous pulley 22 is rotatably mounted on the main housing 10.

[0052] In some embodiments of the present invention, please refer to Figure 3 、 Figure 8 and Figure 9 The diameter of the mounting fixture 40 is the same as the diameter of the fourth synchronous pulley 32 , and the outer diameter of the fourth synchronous pulley 32 after meshing with the second synchronous belt 33 is a first size, which is larger than the diameter of the mounting process hole 226 .

[0053] After the second synchronous belt 33 is transferred to the fourth synchronous pulley 32, the fourth synchronous pulley 32 and the second synchronous belt 33 are engaged with each other, and the outer diameter of the engagement point is the outer diameter (first dimension) of the fourth synchronous pulley 32 and the second synchronous belt 33 after engagement.

[0054] When the installation jig 40 is pulled out, since the first size is larger than the diameter of the installation process hole 226, the second synchronous belt 33 will be pushed to the fourth synchronous pulley 32 under the stop of the first synchronous pulley 22, making it easier for the second synchronous belt 33 to be transferred to the fourth synchronous pulley 32.

[0055] In some embodiments, the edge of the installation process hole 226 is recessed to form a notch, so that the second synchronous belt 33 can be exposed for observation, making it easier for the installer to observe whether the second synchronous belt 33 is properly installed. The specific shape and number of the notch are not limited here.

[0056] In some embodiments of the present invention, please refer to Figures 3 to 6 The main housing 10 has a first circumferential portion 11, and the first synchronous pulley 22 is provided with a first circumferential hole 221 for the first circumferential portion 11 to extend into. A first rotating bearing 71 is provided between the first circumferential portion 11 and the first circumferential hole 221. The first circumferential portion 11 has a limiting step 14 for axially positioning the first rotating bearing 71, and a limiting plate 73 is fixed at one end of the first circumferential portion 11 away from the limiting step 14, and the first rotating bearing 71 is located between the limiting plate 73 and the limiting step 14.

[0057] The first circumferential portion 11 of the main housing 10 is disposed through the first circumferential hole 221 of the first synchronous pulley 22. A first rotary bearing 71 is disposed between the inner circumferential wall of the first circumferential hole 221 and the outer circumferential wall of the first circumferential portion 11, allowing the first synchronous pulley 22 to be rotatably mounted on the main housing 10. Specifically, the inner ring of the first rotary bearing 71 is fixed to the outer circumference of the first circumferential portion 11, while the outer ring of the first rotary bearing 71 is fixed to the inner circumference of the first circumferential hole 221. A limiting plate 73 and a limiting step 14 are located at either axial end of the first rotary bearing 71, thereby limiting the axial position of the first rotary bearing 71 and preventing axial movement.

[0058] In some embodiments, the limiting plate 73 is fixed to the first circumferential portion 11 via a locking screw 74. A first connecting hole is defined in the limiting plate 73, and a second connecting hole 12 is defined at one axial end of the first circumferential portion 11. The locking screw 74 passes through the first connecting hole and connects with the second connecting hole 12, thereby pressing and securing the limiting plate 73 to one end of the first circumferential portion 11. The outer diameter of the limiting plate 73 is larger than the outer diameter of the first circumferential portion 11, thereby blocking the end of the first rotating bearing 71.

[0059] In some embodiments, there are multiple locking screws 74 , and the multiple locking screws 74 are circumferentially spaced apart on the limiting piece 73 .

[0060] In some embodiments, the limiting piece 73 is in the shape of a circular ring, with a hollowed-out center to avoid interference with structures such as the roller brush shaft 53 and allow the roller brush shaft 53 to pass through.

[0061] In some embodiments, the limiting plate 73 is provided with a circumferential positioning hole, and the main housing 10 is provided with a circumferential positioning protrusion 13. When the limiting plate 73 is installed on the main housing 10, the circumferential positioning hole and the circumferential positioning protrusion 13 cooperate to circumferentially position the limiting plate 73 to prevent installation misalignment. The circumferential positioning hole can be in the shape of a circular hole, an arc hole, etc.

[0062] In some embodiments of the present invention, please refer to Figure 2 、 Figure 5 and Figure 6 There are two first rotating bearings 71. The inner wall of the first circumferential hole 221 extends radially inward to form a first limiting portion 222 and a second limiting portion 223. The first limiting portion 222 connects the first synchronous pulley 22 and the second limiting portion 223. The axial dimension of the first limiting portion 222 is greater than the axial dimension of the second limiting portion 223. The limiting step 14, one of the first rotating bearings 71, the first limiting portion 222, the other first rotating bearing 71 and the limiting plate 73 are arranged in sequence along the axial direction, and the axial ends of the first limiting portion 222 respectively abut against the outer rings of the two first rotating bearings 71.

[0063] In the radial direction, the second limiting portion 223 is arranged closer to the central axis than the first limiting portion 222. After the two first rotation bearings 71 are installed in place, the axial ends of the first limiting portion 222 respectively abut against the outer rings of the two first rotation bearings 71, causing the outer rings of the first rotation bearings 71 and the first synchronous pulley 22 to rotate synchronously.

[0064] By providing the two first rotating bearings 71 , at least two supporting positions can be provided between the first circumferential portion 11 and the first circumferential hole 221 , thereby making the rotation of the first synchronous pulley 22 smoother.

[0065] In some embodiments, the first limiting portion 222 includes a connecting portion and a filling portion, the connecting portion connecting the inner wall of the first circumferential hole 221 and the second limiting portion 223, and the filling portion filling on both axial opposite sides of the connecting portion, so that the axial dimension of the first limiting portion 222 is larger than the axial dimension of the second limiting portion 223.

[0066] In some embodiments of the present invention, please refer to Figure 2 、 Figure 5 and Figure 10The pulley drive mechanism also includes a roller brush assembly 50. The fourth synchronous pulley 32 includes a pulley body 321 and a transmission part 322 that are connected to each other. The pulley body 321 is engaged with the second synchronous belt 33. The roller brush assembly 50 has a transmission hole 521 for inserting the transmission part 322. The roller brush assembly 50 moves synchronously with the fourth synchronous pulley 32.

[0067] When installing the pulley drive mechanism, the fourth synchronous pulley 32 is installed on the roller brush assembly 50. The fourth synchronous pulley 32 is circumferentially fixed to the roller brush assembly 50. The transmission part 322 extends into the transmission hole 521. The transmission part 322 and the transmission hole 521 are both non-rotating structures, so that the rotation of the transmission part 322 can drive the roller brush assembly 50 to move.

[0068] By setting a transmission hole 521 on the roller brush assembly 50 and setting a transmission part 322 on the fourth synchronous pulley 32, the fourth synchronous pulley 32 can be directly sleeved on the end of the roller brush assembly 50. No connecting parts are required to connect the roller brush assembly 50 and the fourth synchronous pulley 32, and the installation difficulty is also relatively low.

[0069] In some embodiments, the cross-sections of the transmission hole 521 and the transmission portion 322 are both hexagonal, so that the rotation of the fourth synchronous pulley 32 drives the roller brush assembly 50 to move, and the bristles 511 of the roller brush assembly 50 rub against the wall of the swimming pool to clean dirt.

[0070] In some embodiments, the cross-sections of the transmission hole 521 and the transmission portion 322 are both D-shaped, so that the rotation of the fourth synchronous pulley 32 drives the roller brush assembly 50 to move, and the bristles 511 of the roller brush assembly 50 rub against the wall of the swimming pool to clean dirt.

[0071] It can be understood that when the cross-sections of the transmission hole 521 and the transmission part 322 are both non-circular, the rotation of the transmission part 322 will drive the components to which the transmission hole 521 belongs to rotate.

[0072] In some embodiments of the present invention, please refer to Figure 5 、 Figure 7 and Figure 10 The main shell 10 is provided with a second circumferential hole 15, the fourth synchronous pulley 32 is arranged through the second circumferential hole 15, and the pulley body 321 and the transmission part 322 are connected through the second circumferential part 323, and a second rotating bearing 72 is provided between the second circumferential hole 15 and the second circumferential part 323; the main shell 10 radially extends near the second circumferential hole 15 to form a first annular limiting part 16, and the connection between the second circumferential part 323 and the pulley body 321 protrudes radially outward to form a second annular limiting part 324, and the second rotating bearing 72 is located between the first annular limiting part 16 and the second annular limiting part 324.

[0073] The second rotary bearing 72 is used to connect the main housing 10 and the fourth synchronous pulley 32, providing rotational support for the fourth synchronous pulley 32. Specifically, the inner ring of the second rotary bearing 72 is fixed to the outer circumferential wall of the second circumferential portion 323, and the outer ring of the second rotary bearing 72 is fixed to the inner circumferential wall of the second circumferential hole 15. The axial ends of the second rotary bearing 72 are respectively limited by the first annular limiting portion 16 and the second annular limiting portion 324.

[0074] By disposing the second rotating bearing 72 , the fourth synchronous pulley 32 is rotatably disposed on the main housing 10 , providing a mounting and supporting position for the fourth synchronous pulley 32 .

[0075] In some embodiments, the first annular limit portion 16 abuts against the outer ring of the second rotating bearing 72, the outer ring of the second rotating bearing 72 remains stationary, and the second annular limit portion 324 abuts against the inner ring of the second rotating bearing 72, and the inner ring of the second rotating bearing 72 rotates together with the fourth synchronous pulley 32.

[0076] In some embodiments of the present invention, please refer to Figure 5 、 Figure 7 and Figure 12 The roller brush assembly 50 includes a roller brush body 51, a roller brush shaft 53 and a roller brush sleeve 52. The roller brush sleeve 52 is extended into the end of the roller brush body 51, and the roller brush shaft 53 is arranged through the roller brush body 51, the roller brush sleeve 52 and the fourth synchronous pulley 32. A card slot is provided at the end of the roller brush shaft 53 away from the roller brush body 51, and a retaining spring 75 for axially limiting the fourth synchronous pulley 32 is clamped at the card slot.

[0077] The outer periphery of the roller brush body 51 is provided with bristles 511. When the bristles 511 come into contact with the sidewall of the pool, they scrub the pool's surface. A filter structure can be provided within the roller brush body 51. As dirt is removed from the pool's sidewall by the bristles 511, the filter structure absorbs the dirt to prevent contamination of the pool. The roller brush shaft 53 passes through the roller brush sleeve 52, the roller brush body 51, and the fourth synchronous pulley 32. The central axis of the roller brush shaft 53 is coaxial with the central axis of the roller brush body 51. A retaining spring 75, attached to one end of the roller brush shaft 53, limits the axial position of the roller brush sleeve 52, the roller brush body 51, and the fourth synchronous pulley 32.

[0078] By disposing the roller brush shaft 53 and the roller brush sleeve 52 , the roller brush assembly 50 is more easily fixed axially to the fourth synchronous pulley 32 , thereby preventing the fourth synchronous pulley 32 , the roller brush assembly 50 and the like from axially moving.

[0079] In some embodiments, see Figure 5The inner circumferential wall of the roller brush body 51 has a first annular step 512, and one end of the roller brush sleeve 52 abuts against the first annular step 512. The inner circumferential wall of the roller brush sleeve 52 has a second annular step 522, and one end of the transmission portion 322 of the fourth synchronous pulley 32 abuts against the second annular step 522. The end of the fourth synchronous pulley 32 away from the transmission portion 322 is restrained by a retaining spring 75. In this way, the roller brush body 51, roller brush sleeve 52, roller brush drum, and fourth synchronous pulley 32 are completely axially fixed.

[0080] In some embodiments, a threaded member is fixed to the end of the roller brush shaft 53 , and the threaded member replaces the retaining spring 75 , and the fourth synchronous pulley 32 is compressed by the threaded member.

[0081] In some embodiments of the present invention, please refer to Figure 5 、 Figure 9 and Figure 11 The second end face 2202 of the first synchronous pulley 22 has a first annular protrusion 224 and a second annular protrusion 225. The second annular protrusion 225 is located on the outer periphery of the first annular protrusion 224. The second annular protrusion 225 extends radially outward from the side of the second end face 2202 to form a skirt portion 228. A decorative cover 60 is provided on the skirt portion 228. The decorative cover 60 extends axially on the side facing the second end face 2202 to form a third annular protrusion 61. The third annular protrusion 61 extends between the first annular protrusion 224 and the second annular protrusion 225. The first annular protrusion 224 has a first clamping portion 227. The decorative cover 60 also has a second clamping portion 62 on the side facing the second end face 2202 that is clamped and matched with the first clamping portion 227.

[0082] The decorative cover 60 is positioned over the second end surface 2202 of the first synchronous pulley 22, thereby concealing the exposed structure of the first synchronous pulley 22, giving the pool cleaning robot a simpler appearance and a higher quality feel. When the decorative cover 60 is positioned over the first synchronous pulley 22, the third annular protrusion 61 is inserted between the first annular protrusion 224 and the second annular protrusion 225, the skirt 228 abuts against the end surface of the decorative cover 60, and the first engaging portion 227 and the second engaging portion 62 engage with each other.

[0083] By providing the first annular protrusion 224 and the second annular protrusion 225 on the first synchronous pulley 22 and the third annular protrusion 61 on the decorative cover 60, the decorative cover 60 can be radially limited during installation, making it easier for the decorative cover 60 to align with the first synchronous pulley 22. Furthermore, the first clamping portion 227 on the first synchronous pulley 22 and the second clamping portion 62 on the decorative cover 60 are clamped together, making it easier to assemble and disassemble the decorative cover 60, facilitating assembly and subsequent maintenance.

[0084] In some embodiments, the outer circumferential wall of the third annular protrusion 61 is disposed in close contact with the inner circumferential wall of the second annular protrusion 225, and the decorative cover 60 is radially positioned by the second annular protrusion 225. Alternatively, the inner circumferential wall of the third annular protrusion 61 is disposed in close contact with the outer circumferential wall of the first annular protrusion 224, and the decorative cover 60 is radially positioned by the second annular protrusion 225. Alternatively, the outer circumferential wall of the third annular protrusion 61 is disposed in close contact with the inner circumferential wall of the second annular protrusion 225, and the inner circumferential wall of the third annular protrusion 61 is disposed in close contact with the outer circumferential wall of the first annular protrusion 224. In other words, the distance between the first annular protrusion 224 and the second annular protrusion 225 is the same as the thickness of the third annular protrusion 61.

[0085] In some embodiments, the first annular protrusion 224 , the second annular protrusion 225 and the third annular protrusion 61 may be segmented arc structures, with multiple arc structures forming an annular shape; or, they may be closed annular structures.

[0086] In some embodiments, the second clamping portion 62 is disposed on the third annular protrusion 61 , or the second clamping portion 62 is disposed separately from the third annular protrusion 61 .

[0087] The present invention further provides a swimming pool cleaning robot, which includes the wheeled drive mechanism of any of the above embodiments. The swimming pool cleaning robot is used to clean dirt from a swimming pool and is widely used in public swimming pools, private swimming pools, etc.

[0088] The pool cleaning robot provided by the present invention adopts the above-mentioned pulley drive mechanism, which includes a main housing 10, a first pulley assembly 20, and a second pulley assembly 30. The second pulley assembly 30 is located on the first synchronous pulley 22 of the first pulley assembly 20, and the second pulley assembly 30 is used to drive the roller brush assembly 50 to rotate. In the second pulley assembly 30, the third synchronous pulley 31 is coaxially fixedly connected to the first synchronous pulley 22. When installing the second synchronous belt 33, the second synchronous belt 33 is first wound around the third synchronous pulley 31 and the installation jig 40 passing through the installation process hole 226. Then, the first synchronous pulley 22, the third synchronous pulley 31, and the installation jig 40 are installed together to the main housing 10. The installation jig 40 is docked with the roller brush assembly 50, and then the installation jig 40 is removed, and the second synchronous belt 33 is transferred to the fourth synchronous pulley 32. Compared to the solution where the fourth synchronous pulley 32 is mounted on the first synchronous pulley 22, this solution has fewer structural parts, eliminating the need for connecting components between the fourth synchronous pulley 32 and the first synchronous pulley 22. Furthermore, the installation process is simpler, as there is no need to first assemble the fourth synchronous pulley 32, the third synchronous pulley 31, the first synchronous pulley 22, and the second synchronous belt 33 as a whole. This simplifies the installation process.

[0089] In some embodiments of the present invention, please refer to Figure 1 There are two pulley drive mechanisms, and the main housings 10 of the two pulley drive mechanisms are fixedly connected, or the main housings 10 of the two pulley drive mechanisms are integrally formed. Accordingly, the pool cleaning robot moves via two tracks (first timing belt 23). In the two pulley drive mechanisms, two roller brush assemblies 50 are coaxially arranged, and the ends of the two roller brush assemblies 50 that are closest to each other are fixed to each other.

[0090] In some embodiments, see Figure 1 In the two pulley fixing assemblies, the roller brush shafts 53 of the two roller brush assemblies 50 are coaxial and fixedly connected, and can be regarded as the same axis. Limiting members are provided at both ends of the roller brush shaft 53. The limiting members are used to stop the fourth synchronous pulley 32 and axially position the fourth synchronous pulley 32 and the roller brush shaft 53. The limiting members can be the aforementioned retaining spring 75, a threaded member, etc.

[0091] 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. A pulley drive mechanism, characterized in that: The present invention relates to a method for rotating the belt conveyor belt of claim 1, wherein the first pulley assembly is configured to drive the robot to move and has a first synchronous pulley having a first end face and a second end face axially opposite to each other; the second pulley assembly comprises a third synchronous pulley, a fourth synchronous pulley and a second synchronous belt; the second synchronous belt is wound around the third synchronous pulley and the fourth synchronous pulley; the third synchronous pulley is coaxially fixed to the first end face of the first synchronous pulley; the fourth synchronous pulley is configured to drive the roller brush assembly arranged near the first end face to rotate; the first synchronous pulley is provided with an installation process hole for an installation fixture to extend into; the installation fixture is used to install the second synchronous belt to the fourth synchronous pulley.

2. The pulley drive mechanism according to claim 1, wherein: The third synchronous pulley is integrally formed with the first synchronous pulley.

3. The pulley drive mechanism according to claim 1, wherein: The diameter of the installation fixture is the same as the diameter of the fourth synchronous pulley. The outer diameter of the fourth synchronous pulley after being engaged with the second synchronous belt is a first size, and the first size is larger than the diameter of the installation process hole.

4. The pulley drive mechanism according to claim 1, wherein: The main housing has a first circumferential portion, the first synchronous pulley is provided with a first circumferential hole for the first circumferential portion to extend into, a first rotating bearing is provided between the first circumferential portion and the first circumferential hole, the first circumferential portion has a limiting step for axially positioning the first rotating bearing, and a limiting plate is fixed to one end of the first circumferential portion away from the limiting step, and the first rotating bearing is located between the limiting plate and the limiting step.

5. The pulley drive mechanism according to claim 4, wherein: There are two first rotating bearings, and the inner wall of the first circumferential hole extends radially inward to form a first limiting portion and a second limiting portion. The first limiting portion connects the first synchronous pulley and the second limiting portion, and the axial dimension of the first limiting portion is greater than the axial dimension of the second limiting portion; the limiting step, one of the first rotating bearings, the first limiting portion, the other first rotating bearing and the limiting plate are arranged in sequence along the axial direction, and the axial ends of the first limiting portion respectively abut against the outer rings of the two first rotating bearings.

6. The pulley drive mechanism according to claim 1, wherein: The pulley drive mechanism also includes a roller brush assembly, the fourth synchronous pulley includes a pulley body and a transmission part that are connected to each other, the pulley body is engaged with the second synchronous belt, the roller brush assembly has a transmission hole for inserting the transmission part, and the roller brush assembly moves synchronously with the fourth synchronous pulley.

7. The pulley drive mechanism according to claim 6, wherein: The main shell is provided with a second circumferential hole, the fourth synchronous pulley is arranged through the second circumferential hole, and the pulley body and the transmission part are connected through a second circumferential part, and a second rotating bearing is provided between the second circumferential hole and the second circumferential part; the main shell radially extends near the second circumferential hole to form a first annular limiting part, and the connection between the second circumferential part and the pulley body radially protrudes outward to form a second annular limiting part, and the second rotating bearing is located between the first annular limiting part and the second annular limiting part.

8. The pulley drive mechanism according to claim 6, wherein: The roller brush assembly includes a roller brush body, a roller brush shaft and a roller brush sleeve. The roller brush sleeve is arranged to extend into the end of the roller brush body. The roller brush shaft is arranged to pass through the roller brush body, the roller brush sleeve and the fourth synchronous pulley. A slot is provided at one end of the roller brush shaft away from the roller brush body. A retaining spring is clamped at the slot to limit the axial position of the fourth synchronous pulley.

9. The pulley drive mechanism according to any one of claims 1 to 8, characterized in that: The second end face of the first synchronous pulley has a first annular protrusion and a second annular protrusion, the second annular protrusion is located on the outer periphery of the first annular protrusion, and the second annular protrusion extends radially outward away from the second end face to form a skirt portion; the skirt portion is covered with a decorative cover, and the decorative cover extends axially towards the second end face to form a third annular protrusion, and the third annular protrusion extends between the first annular protrusion and the second annular protrusion; the first annular protrusion has a first clamping portion, and the decorative cover has a second clamping portion that is engaged with the first clamping portion on the side facing the second end face.

10. A swimming pool cleaning robot, characterized by: It comprises the pulley drive mechanism according to any one of claims 1 to 9.

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