Belt wheel type driving mechanism and swimming pool cleaning robot

Abstract

The invention 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, and 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 smaller, 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 invention 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 swimming pool, and remove dirt in the swimming pool by filtering and scrubbing. It can replace manpower to clean the swimming pool, and has a high cleaning efficiency. It can reach every corner of the swimming pool, including some areas that are difficult to clean manually.

[0003] The crawler-type pool cleaning robot can use a pulley transmission mechanism to drive the crawler to move and the roller brush to rotate, so that the robot reaches the cleaning area and scrubs the wall of the pool. However, the current transmission mechanism has many structural parts and the installation process is also relatively complicated. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a pulley drive mechanism and a swimming pool cleaning robot to solve the technical problems existing in the prior art that the transmission mechanism has many structural parts and the installation process is complicated.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention 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 is integrally formed with the first synchronous pulley.

[0007] Optionally, the diameter of the installation 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 installation process hole.

[0008] Optionally, the main shell body 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 meshed 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 groove is provided at one end of the roller brush shaft away from the roller brush body, and a retaining spring is clamped at the groove 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 on the side facing 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 clamped and matched with the first clamping portion on the side facing the second end face.

[0014] The present invention also provides a swimming pool cleaning robot, comprising the above-mentioned wheeled driving mechanism.

[0015] The pulley drive mechanism and the pool cleaning robot provided by the present invention have the beneficial effect that: 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 located on the first synchronous pulley of the first pulley assembly, and the second pulley assembly is used to drive the roller brush assembly to rotate. In the second pulley assembly, the third synchronous pulley is coaxially fixedly connected with the first synchronous pulley. When installing the second synchronous belt, the second synchronous belt is firstly wound around the third synchronous pulley and the installation jig passing through the installation process hole, and then the first synchronous pulley, the third synchronous pulley and the installation jig are installed to the main housing together, the installation jig is docked with the roller brush assembly, and then the installation jig is taken out, and the second synchronous belt is transferred to the fourth synchronous pulley. Compared with the scheme in which the fourth synchronous pulley is installed on the first synchronous pulley, the structural parts of this scheme are fewer, the connecting structural parts between the fourth synchronous pulley and the first synchronous pulley can be omitted, and the installation steps are also simpler, and there is no need to first install the fourth synchronous pulley, the third synchronous pulley, the first synchronous pulley, the second synchronous belt, etc. as a whole, which simplifies the installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

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

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

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

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

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

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

[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 present invention Figure 1 ;

[0025] Fig. 9 The three-dimensional structure of the first synchronous pulley provided in the embodiment of the present invention Figure 2 ;

[0026] Fig.10 A three-dimensional structural diagram of a fourth synchronous pulley provided in an embodiment of the present invention;

[0027] Fig.11 A three-dimensional structural diagram of a decorative cover provided by an embodiment of the present invention;

[0028] Fig.12 A three-dimensional structural diagram of one end of a roller brush assembly provided in an embodiment of the present invention.

[0029] Among them, the reference numerals in the figure 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-installation 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 in conjunction with 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 to" or "disposed on" another element, it can 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 can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the 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 operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

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

[0036] The crawler-type pool cleaning robot can use a pulley transmission mechanism to drive the crawler to move and the roller brush to rotate, so that the robot reaches the cleaning area and scrubs the wall of the pool. The mechanism that drives the pool cleaning robot to move is the first pulley assembly, and the mechanism that drives the roller brush transmission is the second pulley assembly. After the two pulleys of the second pulley assembly are fixed to one of the pulleys of the first pulley assembly, the transmission belt is set on the two pulleys, and one of the pulleys of the first pulley assembly and the second pulley assembly form an installation assembly, which is then installed on the housing of the pool robot so that the output wheel of the second pulley assembly is docked with the roller brush assembly. During the installation process, both pulleys of the second pulley assembly need to be connected to the first pulley assembly through a connector, and there are many connectors and many installation steps. In addition, when the roller brush and the output wheel of the second pulley assembly are docked, the installer cannot see the internal structure, so it is difficult to dock.

[0037] In order to solve the above technical problems, the present invention 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, 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 wound around the third synchronous pulley 31 and the mounting fixture 40 to form a first mounting assembly, and then the first mounting assembly is 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 to reduce the difficulty of installation.

[0038] The pulley drive mechanism provided in the embodiment of the present invention 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 move to a position that needs to be cleaned. The first pulley assembly 20 includes a first synchronous pulley 22, a second synchronous pulley and a first synchronous belt 23, and the first synchronous belt 23 is wound around the first synchronous pulley 22 and the second synchronous pulley. The first synchronous belt 23 can be a crawler that moves the robot. The first synchronous pulley 22 has a first end face 2201 and a second end face 2202, wherein the first end face 2201 is arranged facing the main housing 10, and the second end face 2202 is arranged facing away from the main housing 10.

[0042] The second pulley assembly 30 is used to drive the roller brush assembly 50 to rotate, and the roller brush assembly 50 is used to scrub the wall of the swimming pool. In this way, while the swimming pool cleaning robot is moving, it scrubs the wall of the swimming pool, which can improve the scrubbing efficiency. The second pulley assembly 30 includes a third synchronous pulley 31, a fourth synchronous pulley 32 and a second synchronous belt 33, and 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 fixedly connected to the first synchronous pulley 22, that is, the third synchronous pulley 31 and the first synchronous pulley 22 rotate synchronously, so that the first pulley assembly 20 and the second pulley assembly 30 can be driven by the same driving member, which can reduce the number of driving members. The third synchronous pulley 31 is fixed to the first end face 2201 of the first synchronous pulley 22, and the roller brush assembly 50 and the fourth synchronous pulley 32 are also arranged close to the first end face 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, and 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 installation 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, the fourth synchronous pulley 32 is installed to the roller brush assembly 50, and then the installation 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, and the second synchronous belt 33 is wound around the third synchronous pulley 31 and the installation jig 40, so as to form a first installation assembly. The roller brush assembly 50 and the main housing 10 with the fourth synchronous pulley 32 installed are the second installation assembly, and finally the first end face 2201 of the first installation assembly is installed facing the second installation assembly, the installation jig 40 is opposite to the fourth synchronous pulley 32, the main housing 10 and the first synchronous pulley 22 are fixedly connected, the installation jig 40 is pulled out, and the second synchronous belt 33 on the installation 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 with the first synchronous pulley 22. When installing the second synchronous belt 33, the second synchronous belt 33 is firstly wound around the third synchronous pulley 31 and the installation jig 40 passing through the installation process hole 226, and 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 fourth synchronous pulley 32, and then the installation jig 40 is taken out, 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, see 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 meshed 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 fixture 40 is a rod-shaped structure, and the portion of the mounting fixture 40 used for docking with the fourth synchronous pulley 32 is the plug-in end of the mounting fixture 40, and the outer diameter and tooth shape of the plug-in end of the mounting fixture 40 are the same as the outer diameter and tooth shape of the fourth synchronous pulley 32. When the mounting fixture 40 is docked with the fourth synchronous pulley 32, the second synchronous belt 33 can be smoothly transferred from the outer periphery of the mounting fixture 40 to the fourth synchronous pulley 32.

[0048] Optionally, the plug-in end of the mounting fixture 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 fixture 40 and the fourth synchronous pulley 32 circumferentially, thereby allowing the tooth shapes of the mounting fixture 40 and the fourth synchronous pulley 32 to be completely aligned.

[0049] In some embodiments of the present invention, see 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 piece, a fixing piece, 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 at the first end surface 2201 of the first synchronous pulley 22. The first synchronous pulley 22 and the third synchronous pulley 31 have a first circumferential hole 221 at the center thereof, through which the main housing 10 passes, so that the first synchronous pulley 22 can be rotatably mounted on the main housing 10.

[0052] In some embodiments of the present invention, see Figure 3 , Figure 8 and Fig. 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 outer contour of the fourth synchronous pulley 32 after meshing with the second synchronous belt 33 is a first size, and the first size 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 meshed with each other, and the outer diameter of the meshing point is the outer diameter (first dimension) of the outer contour after the fourth synchronous pulley 32 and the second synchronous belt 33 are meshed.

[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, which is convenient for the installer to observe whether the second synchronous belt 33 is installed in place. The specific shape and number of the notch are not limited here.

[0056] In some embodiments of the present invention, see 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 arranged through the first circumferential hole 221 of the first synchronous pulley 22, and the first rotating bearing 71 is arranged between the inner circumferential wall of the first circumferential hole 221 and the outer circumferential wall of the first circumferential portion 11, so that the first synchronous pulley 22 is rotatably arranged on the main housing 10. Specifically, the inner ring of the first rotating bearing 71 is fixed to the outer periphery of the first circumferential portion 11, and the outer ring of the first rotating bearing 71 is fixed to the inner periphery of the first circumferential hole 221. The limiting piece 73 and the limiting step 14 are respectively located at the axial ends of the first rotating bearing 71, so that the first rotating bearing 71 can be axially limited to prevent the first rotating bearing 71 from axial movement.

[0058] In some embodiments, the limiting plate 73 is fixed to the first circumferential portion 11 by a locking screw 74. A first connecting hole is provided on the limiting plate 73, and a second connecting hole 12 is provided at one axial end of the first circumferential portion 11. The locking screw 74 passes through the first connecting hole and is connected to the second connecting hole 12, so that the limiting plate 73 is pressed and fixed 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, so that the end of the first rotating bearing 71 can be stopped.

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

[0060] In some embodiments, the limiting piece 73 is in the shape of a circular ring, and the middle part thereof is hollowed out to avoid interference with the roller brush shaft 53 and other structures, and the roller brush shaft 53 can pass through.

[0061] In some embodiments, a circumferential positioning hole is provided on the limiting piece 73, and a circumferential positioning protrusion 13 is provided on the main housing 10. When the limiting piece 73 is installed on the main housing 10, the circumferential positioning hole and the circumferential positioning protrusion 13 are positioned to prevent the limiting piece 73 from being misaligned during installation. The shape of the circumferential positioning hole can be a circular hole, an arc hole, etc.

[0062] In some embodiments of the present invention, see 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 rotating 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 rotating bearings 71, so that the outer rings of the first rotating bearings 71 and the first synchronous pulley 22 rotate synchronously.

[0064] By disposing 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 two opposite axial 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, see Figure 2 , Figure 5 and Fig.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 meshed 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, and 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 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 part 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 part 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, see Figure 5 , Figure 7 and Fig.10 The main shell 10 is provided with a second circumferential hole 15, and 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 rotating bearing 72 is used to connect the main housing 10 and the fourth synchronous pulley 32, and provide rotation support for the fourth synchronous pulley 32. Specifically, the inner ring of the second rotating bearing 72 is fixed to the outer peripheral wall of the second circumferential portion 323, and the outer ring of the second rotating bearing 72 is fixed to the inner peripheral wall of the second circumferential hole 15. The axial ends of the second rotating 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 fixed, 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, see Figure 5 , Figure 7 and Fig.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 arranged to extend into the end of the roller brush body 51. The roller brush shaft 53 passes through the roller brush body 51, the roller brush sleeve 52 and the fourth synchronous pulley 32. A groove is provided at one end of the roller brush shaft 53 away from the roller brush body 51. A retaining spring 75 for axially limiting the fourth synchronous pulley 32 is clamped at the groove.

[0077] The outer periphery of the roller brush body 51 is provided with bristles 511, and when the bristles 511 contact the side wall of the swimming pool, the bristles 511 can scrub the side wall of the swimming pool. A filtering structure can be provided inside the roller brush body 51, and when dirt is removed from the side wall of the swimming pool by the bristles 511, the filtering structure can absorb the dirt to avoid polluting the swimming pool. The roller brush shaft 53 is provided through the roller brush sleeve 52, the roller brush body 51 and the fourth synchronous pulley 32, and the central axis of the roller brush shaft 53 is coaxially provided with the central axis of the roller brush body 51. The retaining spring 75 is clamped at one end of the roller brush shaft 53, and can axially limit the roller brush sleeve 52, the roller brush body 51 and the fourth synchronous pulley 32.

[0078] By providing the roller brush shaft 53 and the roller brush sleeve 52 , the roller brush assembly 50 can be 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 part 322 of the fourth synchronous pulley 32 abuts against the second annular step 522, and the end of the fourth synchronous pulley 32 away from the transmission part 322 is limited by the clamping spring 75. In this way, the roller brush body 51, the roller brush sleeve 52, the roller brush cylinder and the fourth synchronous pulley 32 can be 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, see Figure 5 , Fig. 9 and Fig.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, and 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, and the decorative cover 60 extends axially from the side facing the second end face 2202 to form a third annular protrusion 61, and the third annular protrusion 61 extends between the first annular protrusion 224 and the second annular protrusion 225; a first clamping portion 227 is provided at the first annular protrusion 224, and a second clamping portion 62 that is clamped and matched with the first clamping portion 227 is also provided on the side of the decorative cover 60 facing the second end face 2202.

[0082] The decorative cover 60 is used to cover the second end surface 2202 of the first synchronous pulley 22, so that the exposed structure on the first synchronous pulley 22 can be covered, making the appearance of the swimming pool cleaning robot more concise and the product texture better. When the decorative cover 60 is covered on 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 portion 228 and the end surface of the decorative cover 60 are mutually abutted, and the first clamping portion 227 and the second clamping portion 62 are mutually clamped.

[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, and the decorative cover 60 is more easily aligned with the first synchronous pulley 22. Moreover, by clamping the first clamping portion 227 on the first synchronous pulley 22 and the second clamping portion 62 on the decorative cover 60, the decorative cover 60 can be easily disassembled and assembled, which is convenient for assembly and subsequent maintenance.

[0084] In some embodiments, the outer circumferential wall of the third annular protrusion 61 is arranged 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 arranged 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 arranged 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 arranged in close contact with the outer circumferential wall of the first annular protrusion 224, that is, 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, may be a closed annular structure.

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

[0087] The present invention also provides a swimming pool cleaning robot, which includes the wheeled driving mechanism in any of the above embodiments. The swimming pool cleaning robot is used to clean dirt from the 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 with the first synchronous pulley 22. When installing the second synchronous belt 33, the second synchronous belt 33 is firstly wound around the third synchronous pulley 31 and the installation jig 40 passing through the installation process hole 226, and 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 taken out, 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, and 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.

[0089] In some embodiments of the present invention, see Figure 1 The number of the pulley drive mechanisms is two, 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 swimming pool cleaning robot moves via two tracks (first synchronous belts 23). In the two pulley drive mechanisms, the two roller brush assemblies 50 are coaxially arranged, and the ends of the two roller brush assemblies 50 that are close 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. Both ends of the roller brush shaft 53 are provided with limit members, which are used to stop the fourth synchronous pulley 32 and axially position the fourth synchronous pulley 32 and the roller brush shaft 53. The limit members can be the above-mentioned retaining spring 75, 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 substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pulley drive mechanism, characterized in that: It includes 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 fixture to extend into, and 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, characterized in that: The third synchronous belt pulley is integrally formed with the first synchronous belt pulley.

3. The pulley drive mechanism according to claim 1, characterized in that: The diameter of the installation jig 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 installation process hole.

4. The pulley drive mechanism according to claim 1, characterized in that: 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 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.

5. The pulley drive mechanism according to claim 4, characterized in that: 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, characterized in that: The pulley drive mechanism also includes a roller brush assembly, the fourth synchronous pulley includes a pulley body and a transmission part connected to each other, the pulley body is meshed 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, characterized in that: The main shell body 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 body 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, characterized in that: 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, and the roller brush shaft is arranged to pass through the roller brush body, the roller brush sleeve and the fourth synchronous pulley. A groove is provided at one end of the roller brush shaft away from the roller brush body, and a retaining spring for axially limiting the fourth synchronous pulley is clamped at the groove.

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 on the side facing 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 is provided with a first clamping portion, and the decorative cover also has a second clamping portion that is clamped and matched with the first clamping portion on the side facing the second end face.

10. A swimming pool cleaning robot, characterized in that: It comprises the pulley drive mechanism as described in any one of claims 1 to 9.

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